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6b5732b5ca
Convert to new uid/gid option parsing helpers Signed-off-by: Eric Sandeen <sandeen@redhat.com> Link: https://lore.kernel.org/r/a84be40d-5110-4dac-83b1-0ea8e043f0fd@redhat.com Signed-off-by: Christian Brauner <brauner@kernel.org>
7408 lines
205 KiB
C
7408 lines
205 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/ext4/super.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/fs/minix/inode.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* Big-endian to little-endian byte-swapping/bitmaps by
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* David S. Miller (davem@caip.rutgers.edu), 1995
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/fs.h>
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#include <linux/time.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/backing-dev.h>
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#include <linux/parser.h>
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#include <linux/buffer_head.h>
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#include <linux/exportfs.h>
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#include <linux/vfs.h>
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#include <linux/random.h>
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#include <linux/mount.h>
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#include <linux/namei.h>
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#include <linux/quotaops.h>
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#include <linux/seq_file.h>
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#include <linux/ctype.h>
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#include <linux/log2.h>
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#include <linux/crc16.h>
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#include <linux/dax.h>
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#include <linux/uaccess.h>
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#include <linux/iversion.h>
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#include <linux/unicode.h>
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#include <linux/part_stat.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/fsnotify.h>
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#include <linux/fs_context.h>
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#include <linux/fs_parser.h>
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#include "ext4.h"
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#include "ext4_extents.h" /* Needed for trace points definition */
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#include "ext4_jbd2.h"
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#include "xattr.h"
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#include "acl.h"
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#include "mballoc.h"
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#include "fsmap.h"
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#define CREATE_TRACE_POINTS
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#include <trace/events/ext4.h>
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static struct ext4_lazy_init *ext4_li_info;
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static DEFINE_MUTEX(ext4_li_mtx);
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static struct ratelimit_state ext4_mount_msg_ratelimit;
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static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
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unsigned long journal_devnum);
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static int ext4_show_options(struct seq_file *seq, struct dentry *root);
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static void ext4_update_super(struct super_block *sb);
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static int ext4_commit_super(struct super_block *sb);
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static int ext4_mark_recovery_complete(struct super_block *sb,
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struct ext4_super_block *es);
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static int ext4_clear_journal_err(struct super_block *sb,
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struct ext4_super_block *es);
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static int ext4_sync_fs(struct super_block *sb, int wait);
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static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
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static int ext4_unfreeze(struct super_block *sb);
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static int ext4_freeze(struct super_block *sb);
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static inline int ext2_feature_set_ok(struct super_block *sb);
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static inline int ext3_feature_set_ok(struct super_block *sb);
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static void ext4_destroy_lazyinit_thread(void);
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static void ext4_unregister_li_request(struct super_block *sb);
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static void ext4_clear_request_list(void);
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static struct inode *ext4_get_journal_inode(struct super_block *sb,
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unsigned int journal_inum);
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static int ext4_validate_options(struct fs_context *fc);
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static int ext4_check_opt_consistency(struct fs_context *fc,
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struct super_block *sb);
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static void ext4_apply_options(struct fs_context *fc, struct super_block *sb);
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static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param);
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static int ext4_get_tree(struct fs_context *fc);
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static int ext4_reconfigure(struct fs_context *fc);
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static void ext4_fc_free(struct fs_context *fc);
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static int ext4_init_fs_context(struct fs_context *fc);
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static void ext4_kill_sb(struct super_block *sb);
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static const struct fs_parameter_spec ext4_param_specs[];
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/*
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* Lock ordering
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*
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* page fault path:
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* mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start
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* -> page lock -> i_data_sem (rw)
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*
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* buffered write path:
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* sb_start_write -> i_mutex -> mmap_lock
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* sb_start_write -> i_mutex -> transaction start -> page lock ->
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* i_data_sem (rw)
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*
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* truncate:
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* sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) ->
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* page lock
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* sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start ->
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* i_data_sem (rw)
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*
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* direct IO:
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* sb_start_write -> i_mutex -> mmap_lock
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* sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw)
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*
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* writepages:
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* transaction start -> page lock(s) -> i_data_sem (rw)
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*/
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static const struct fs_context_operations ext4_context_ops = {
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.parse_param = ext4_parse_param,
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.get_tree = ext4_get_tree,
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.reconfigure = ext4_reconfigure,
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.free = ext4_fc_free,
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};
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#if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2)
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static struct file_system_type ext2_fs_type = {
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.owner = THIS_MODULE,
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.name = "ext2",
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.init_fs_context = ext4_init_fs_context,
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.parameters = ext4_param_specs,
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.kill_sb = ext4_kill_sb,
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.fs_flags = FS_REQUIRES_DEV,
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};
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MODULE_ALIAS_FS("ext2");
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MODULE_ALIAS("ext2");
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#define IS_EXT2_SB(sb) ((sb)->s_type == &ext2_fs_type)
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#else
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#define IS_EXT2_SB(sb) (0)
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#endif
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static struct file_system_type ext3_fs_type = {
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.owner = THIS_MODULE,
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.name = "ext3",
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.init_fs_context = ext4_init_fs_context,
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.parameters = ext4_param_specs,
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.kill_sb = ext4_kill_sb,
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.fs_flags = FS_REQUIRES_DEV,
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};
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MODULE_ALIAS_FS("ext3");
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MODULE_ALIAS("ext3");
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#define IS_EXT3_SB(sb) ((sb)->s_type == &ext3_fs_type)
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static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags,
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bh_end_io_t *end_io)
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{
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/*
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* buffer's verified bit is no longer valid after reading from
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* disk again due to write out error, clear it to make sure we
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* recheck the buffer contents.
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*/
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clear_buffer_verified(bh);
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bh->b_end_io = end_io ? end_io : end_buffer_read_sync;
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get_bh(bh);
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submit_bh(REQ_OP_READ | op_flags, bh);
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}
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void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags,
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bh_end_io_t *end_io)
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{
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BUG_ON(!buffer_locked(bh));
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if (ext4_buffer_uptodate(bh)) {
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unlock_buffer(bh);
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return;
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}
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__ext4_read_bh(bh, op_flags, end_io);
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}
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int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io)
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{
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BUG_ON(!buffer_locked(bh));
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if (ext4_buffer_uptodate(bh)) {
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unlock_buffer(bh);
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return 0;
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}
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__ext4_read_bh(bh, op_flags, end_io);
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wait_on_buffer(bh);
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if (buffer_uptodate(bh))
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return 0;
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return -EIO;
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}
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int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait)
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{
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lock_buffer(bh);
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if (!wait) {
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ext4_read_bh_nowait(bh, op_flags, NULL);
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return 0;
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}
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return ext4_read_bh(bh, op_flags, NULL);
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}
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/*
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* This works like __bread_gfp() except it uses ERR_PTR for error
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* returns. Currently with sb_bread it's impossible to distinguish
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* between ENOMEM and EIO situations (since both result in a NULL
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* return.
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*/
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static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb,
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sector_t block,
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blk_opf_t op_flags, gfp_t gfp)
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{
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struct buffer_head *bh;
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int ret;
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bh = sb_getblk_gfp(sb, block, gfp);
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if (bh == NULL)
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return ERR_PTR(-ENOMEM);
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if (ext4_buffer_uptodate(bh))
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return bh;
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ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true);
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if (ret) {
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put_bh(bh);
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return ERR_PTR(ret);
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}
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return bh;
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}
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struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block,
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blk_opf_t op_flags)
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{
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gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping,
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~__GFP_FS) | __GFP_MOVABLE;
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return __ext4_sb_bread_gfp(sb, block, op_flags, gfp);
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}
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struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb,
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sector_t block)
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{
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gfp_t gfp = mapping_gfp_constraint(sb->s_bdev->bd_mapping,
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~__GFP_FS);
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return __ext4_sb_bread_gfp(sb, block, 0, gfp);
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}
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void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block)
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{
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struct buffer_head *bh = bdev_getblk(sb->s_bdev, block,
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sb->s_blocksize, GFP_NOWAIT | __GFP_NOWARN);
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if (likely(bh)) {
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if (trylock_buffer(bh))
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ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL);
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brelse(bh);
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}
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}
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static int ext4_verify_csum_type(struct super_block *sb,
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struct ext4_super_block *es)
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{
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if (!ext4_has_feature_metadata_csum(sb))
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return 1;
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return es->s_checksum_type == EXT4_CRC32C_CHKSUM;
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}
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__le32 ext4_superblock_csum(struct super_block *sb,
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struct ext4_super_block *es)
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{
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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int offset = offsetof(struct ext4_super_block, s_checksum);
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__u32 csum;
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csum = ext4_chksum(sbi, ~0, (char *)es, offset);
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return cpu_to_le32(csum);
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}
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static int ext4_superblock_csum_verify(struct super_block *sb,
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struct ext4_super_block *es)
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{
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if (!ext4_has_metadata_csum(sb))
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return 1;
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return es->s_checksum == ext4_superblock_csum(sb, es);
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}
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void ext4_superblock_csum_set(struct super_block *sb)
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{
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struct ext4_super_block *es = EXT4_SB(sb)->s_es;
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if (!ext4_has_metadata_csum(sb))
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return;
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es->s_checksum = ext4_superblock_csum(sb, es);
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}
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ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le32_to_cpu(bg->bg_block_bitmap_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0);
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}
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ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le32_to_cpu(bg->bg_inode_bitmap_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0);
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}
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ext4_fsblk_t ext4_inode_table(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le32_to_cpu(bg->bg_inode_table_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0);
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}
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__u32 ext4_free_group_clusters(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le16_to_cpu(bg->bg_free_blocks_count_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0);
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}
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__u32 ext4_free_inodes_count(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le16_to_cpu(bg->bg_free_inodes_count_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0);
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}
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__u32 ext4_used_dirs_count(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le16_to_cpu(bg->bg_used_dirs_count_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0);
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}
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__u32 ext4_itable_unused_count(struct super_block *sb,
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struct ext4_group_desc *bg)
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{
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return le16_to_cpu(bg->bg_itable_unused_lo) |
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(EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ?
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(__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0);
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}
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void ext4_block_bitmap_set(struct super_block *sb,
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struct ext4_group_desc *bg, ext4_fsblk_t blk)
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{
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bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32);
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}
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void ext4_inode_bitmap_set(struct super_block *sb,
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struct ext4_group_desc *bg, ext4_fsblk_t blk)
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{
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bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32);
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}
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void ext4_inode_table_set(struct super_block *sb,
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struct ext4_group_desc *bg, ext4_fsblk_t blk)
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{
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bg->bg_inode_table_lo = cpu_to_le32((u32)blk);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_inode_table_hi = cpu_to_le32(blk >> 32);
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}
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void ext4_free_group_clusters_set(struct super_block *sb,
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struct ext4_group_desc *bg, __u32 count)
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{
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bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16);
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}
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void ext4_free_inodes_set(struct super_block *sb,
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struct ext4_group_desc *bg, __u32 count)
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{
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bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16);
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}
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void ext4_used_dirs_set(struct super_block *sb,
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struct ext4_group_desc *bg, __u32 count)
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{
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bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16);
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}
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void ext4_itable_unused_set(struct super_block *sb,
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struct ext4_group_desc *bg, __u32 count)
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{
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bg->bg_itable_unused_lo = cpu_to_le16((__u16)count);
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if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT)
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bg->bg_itable_unused_hi = cpu_to_le16(count >> 16);
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}
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static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now)
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{
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now = clamp_val(now, 0, (1ull << 40) - 1);
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*lo = cpu_to_le32(lower_32_bits(now));
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*hi = upper_32_bits(now);
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}
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static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi)
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{
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return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo);
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}
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#define ext4_update_tstamp(es, tstamp) \
|
|
__ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \
|
|
ktime_get_real_seconds())
|
|
#define ext4_get_tstamp(es, tstamp) \
|
|
__ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi)
|
|
|
|
#define EXT4_SB_REFRESH_INTERVAL_SEC (3600) /* seconds (1 hour) */
|
|
#define EXT4_SB_REFRESH_INTERVAL_KB (16384) /* kilobytes (16MB) */
|
|
|
|
/*
|
|
* The ext4_maybe_update_superblock() function checks and updates the
|
|
* superblock if needed.
|
|
*
|
|
* This function is designed to update the on-disk superblock only under
|
|
* certain conditions to prevent excessive disk writes and unnecessary
|
|
* waking of the disk from sleep. The superblock will be updated if:
|
|
* 1. More than an hour has passed since the last superblock update, and
|
|
* 2. More than 16MB have been written since the last superblock update.
|
|
*
|
|
* @sb: The superblock
|
|
*/
|
|
static void ext4_maybe_update_superblock(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
journal_t *journal = sbi->s_journal;
|
|
time64_t now;
|
|
__u64 last_update;
|
|
__u64 lifetime_write_kbytes;
|
|
__u64 diff_size;
|
|
|
|
if (sb_rdonly(sb) || !(sb->s_flags & SB_ACTIVE) ||
|
|
!journal || (journal->j_flags & JBD2_UNMOUNT))
|
|
return;
|
|
|
|
now = ktime_get_real_seconds();
|
|
last_update = ext4_get_tstamp(es, s_wtime);
|
|
|
|
if (likely(now - last_update < EXT4_SB_REFRESH_INTERVAL_SEC))
|
|
return;
|
|
|
|
lifetime_write_kbytes = sbi->s_kbytes_written +
|
|
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
|
|
sbi->s_sectors_written_start) >> 1);
|
|
|
|
/* Get the number of kilobytes not written to disk to account
|
|
* for statistics and compare with a multiple of 16 MB. This
|
|
* is used to determine when the next superblock commit should
|
|
* occur (i.e. not more often than once per 16MB if there was
|
|
* less written in an hour).
|
|
*/
|
|
diff_size = lifetime_write_kbytes - le64_to_cpu(es->s_kbytes_written);
|
|
|
|
if (diff_size > EXT4_SB_REFRESH_INTERVAL_KB)
|
|
schedule_work(&EXT4_SB(sb)->s_sb_upd_work);
|
|
}
|
|
|
|
static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn)
|
|
{
|
|
struct super_block *sb = journal->j_private;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
int error = is_journal_aborted(journal);
|
|
struct ext4_journal_cb_entry *jce;
|
|
|
|
BUG_ON(txn->t_state == T_FINISHED);
|
|
|
|
ext4_process_freed_data(sb, txn->t_tid);
|
|
ext4_maybe_update_superblock(sb);
|
|
|
|
spin_lock(&sbi->s_md_lock);
|
|
while (!list_empty(&txn->t_private_list)) {
|
|
jce = list_entry(txn->t_private_list.next,
|
|
struct ext4_journal_cb_entry, jce_list);
|
|
list_del_init(&jce->jce_list);
|
|
spin_unlock(&sbi->s_md_lock);
|
|
jce->jce_func(sb, jce, error);
|
|
spin_lock(&sbi->s_md_lock);
|
|
}
|
|
spin_unlock(&sbi->s_md_lock);
|
|
}
|
|
|
|
/*
|
|
* This writepage callback for write_cache_pages()
|
|
* takes care of a few cases after page cleaning.
|
|
*
|
|
* write_cache_pages() already checks for dirty pages
|
|
* and calls clear_page_dirty_for_io(), which we want,
|
|
* to write protect the pages.
|
|
*
|
|
* However, we may have to redirty a page (see below.)
|
|
*/
|
|
static int ext4_journalled_writepage_callback(struct folio *folio,
|
|
struct writeback_control *wbc,
|
|
void *data)
|
|
{
|
|
transaction_t *transaction = (transaction_t *) data;
|
|
struct buffer_head *bh, *head;
|
|
struct journal_head *jh;
|
|
|
|
bh = head = folio_buffers(folio);
|
|
do {
|
|
/*
|
|
* We have to redirty a page in these cases:
|
|
* 1) If buffer is dirty, it means the page was dirty because it
|
|
* contains a buffer that needs checkpointing. So the dirty bit
|
|
* needs to be preserved so that checkpointing writes the buffer
|
|
* properly.
|
|
* 2) If buffer is not part of the committing transaction
|
|
* (we may have just accidentally come across this buffer because
|
|
* inode range tracking is not exact) or if the currently running
|
|
* transaction already contains this buffer as well, dirty bit
|
|
* needs to be preserved so that the buffer gets writeprotected
|
|
* properly on running transaction's commit.
|
|
*/
|
|
jh = bh2jh(bh);
|
|
if (buffer_dirty(bh) ||
|
|
(jh && (jh->b_transaction != transaction ||
|
|
jh->b_next_transaction))) {
|
|
folio_redirty_for_writepage(wbc, folio);
|
|
goto out;
|
|
}
|
|
} while ((bh = bh->b_this_page) != head);
|
|
|
|
out:
|
|
return AOP_WRITEPAGE_ACTIVATE;
|
|
}
|
|
|
|
static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode)
|
|
{
|
|
struct address_space *mapping = jinode->i_vfs_inode->i_mapping;
|
|
struct writeback_control wbc = {
|
|
.sync_mode = WB_SYNC_ALL,
|
|
.nr_to_write = LONG_MAX,
|
|
.range_start = jinode->i_dirty_start,
|
|
.range_end = jinode->i_dirty_end,
|
|
};
|
|
|
|
return write_cache_pages(mapping, &wbc,
|
|
ext4_journalled_writepage_callback,
|
|
jinode->i_transaction);
|
|
}
|
|
|
|
static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode)
|
|
{
|
|
int ret;
|
|
|
|
if (ext4_should_journal_data(jinode->i_vfs_inode))
|
|
ret = ext4_journalled_submit_inode_data_buffers(jinode);
|
|
else
|
|
ret = ext4_normal_submit_inode_data_buffers(jinode);
|
|
return ret;
|
|
}
|
|
|
|
static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!ext4_should_journal_data(jinode->i_vfs_inode))
|
|
ret = jbd2_journal_finish_inode_data_buffers(jinode);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool system_going_down(void)
|
|
{
|
|
return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
|
|
|| system_state == SYSTEM_RESTART;
|
|
}
|
|
|
|
struct ext4_err_translation {
|
|
int code;
|
|
int errno;
|
|
};
|
|
|
|
#define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err }
|
|
|
|
static struct ext4_err_translation err_translation[] = {
|
|
EXT4_ERR_TRANSLATE(EIO),
|
|
EXT4_ERR_TRANSLATE(ENOMEM),
|
|
EXT4_ERR_TRANSLATE(EFSBADCRC),
|
|
EXT4_ERR_TRANSLATE(EFSCORRUPTED),
|
|
EXT4_ERR_TRANSLATE(ENOSPC),
|
|
EXT4_ERR_TRANSLATE(ENOKEY),
|
|
EXT4_ERR_TRANSLATE(EROFS),
|
|
EXT4_ERR_TRANSLATE(EFBIG),
|
|
EXT4_ERR_TRANSLATE(EEXIST),
|
|
EXT4_ERR_TRANSLATE(ERANGE),
|
|
EXT4_ERR_TRANSLATE(EOVERFLOW),
|
|
EXT4_ERR_TRANSLATE(EBUSY),
|
|
EXT4_ERR_TRANSLATE(ENOTDIR),
|
|
EXT4_ERR_TRANSLATE(ENOTEMPTY),
|
|
EXT4_ERR_TRANSLATE(ESHUTDOWN),
|
|
EXT4_ERR_TRANSLATE(EFAULT),
|
|
};
|
|
|
|
static int ext4_errno_to_code(int errno)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(err_translation); i++)
|
|
if (err_translation[i].errno == errno)
|
|
return err_translation[i].code;
|
|
return EXT4_ERR_UNKNOWN;
|
|
}
|
|
|
|
static void save_error_info(struct super_block *sb, int error,
|
|
__u32 ino, __u64 block,
|
|
const char *func, unsigned int line)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
/* We default to EFSCORRUPTED error... */
|
|
if (error == 0)
|
|
error = EFSCORRUPTED;
|
|
|
|
spin_lock(&sbi->s_error_lock);
|
|
sbi->s_add_error_count++;
|
|
sbi->s_last_error_code = error;
|
|
sbi->s_last_error_line = line;
|
|
sbi->s_last_error_ino = ino;
|
|
sbi->s_last_error_block = block;
|
|
sbi->s_last_error_func = func;
|
|
sbi->s_last_error_time = ktime_get_real_seconds();
|
|
if (!sbi->s_first_error_time) {
|
|
sbi->s_first_error_code = error;
|
|
sbi->s_first_error_line = line;
|
|
sbi->s_first_error_ino = ino;
|
|
sbi->s_first_error_block = block;
|
|
sbi->s_first_error_func = func;
|
|
sbi->s_first_error_time = sbi->s_last_error_time;
|
|
}
|
|
spin_unlock(&sbi->s_error_lock);
|
|
}
|
|
|
|
/* Deal with the reporting of failure conditions on a filesystem such as
|
|
* inconsistencies detected or read IO failures.
|
|
*
|
|
* On ext2, we can store the error state of the filesystem in the
|
|
* superblock. That is not possible on ext4, because we may have other
|
|
* write ordering constraints on the superblock which prevent us from
|
|
* writing it out straight away; and given that the journal is about to
|
|
* be aborted, we can't rely on the current, or future, transactions to
|
|
* write out the superblock safely.
|
|
*
|
|
* We'll just use the jbd2_journal_abort() error code to record an error in
|
|
* the journal instead. On recovery, the journal will complain about
|
|
* that error until we've noted it down and cleared it.
|
|
*
|
|
* If force_ro is set, we unconditionally force the filesystem into an
|
|
* ABORT|READONLY state, unless the error response on the fs has been set to
|
|
* panic in which case we take the easy way out and panic immediately. This is
|
|
* used to deal with unrecoverable failures such as journal IO errors or ENOMEM
|
|
* at a critical moment in log management.
|
|
*/
|
|
static void ext4_handle_error(struct super_block *sb, bool force_ro, int error,
|
|
__u32 ino, __u64 block,
|
|
const char *func, unsigned int line)
|
|
{
|
|
journal_t *journal = EXT4_SB(sb)->s_journal;
|
|
bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT);
|
|
|
|
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
|
|
if (test_opt(sb, WARN_ON_ERROR))
|
|
WARN_ON_ONCE(1);
|
|
|
|
if (!continue_fs && !sb_rdonly(sb)) {
|
|
set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags);
|
|
if (journal)
|
|
jbd2_journal_abort(journal, -EIO);
|
|
}
|
|
|
|
if (!bdev_read_only(sb->s_bdev)) {
|
|
save_error_info(sb, error, ino, block, func, line);
|
|
/*
|
|
* In case the fs should keep running, we need to writeout
|
|
* superblock through the journal. Due to lock ordering
|
|
* constraints, it may not be safe to do it right here so we
|
|
* defer superblock flushing to a workqueue.
|
|
*/
|
|
if (continue_fs && journal)
|
|
schedule_work(&EXT4_SB(sb)->s_sb_upd_work);
|
|
else
|
|
ext4_commit_super(sb);
|
|
}
|
|
|
|
/*
|
|
* We force ERRORS_RO behavior when system is rebooting. Otherwise we
|
|
* could panic during 'reboot -f' as the underlying device got already
|
|
* disabled.
|
|
*/
|
|
if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) {
|
|
panic("EXT4-fs (device %s): panic forced after error\n",
|
|
sb->s_id);
|
|
}
|
|
|
|
if (sb_rdonly(sb) || continue_fs)
|
|
return;
|
|
|
|
ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");
|
|
/*
|
|
* Make sure updated value of ->s_mount_flags will be visible before
|
|
* ->s_flags update
|
|
*/
|
|
smp_wmb();
|
|
sb->s_flags |= SB_RDONLY;
|
|
}
|
|
|
|
static void update_super_work(struct work_struct *work)
|
|
{
|
|
struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info,
|
|
s_sb_upd_work);
|
|
journal_t *journal = sbi->s_journal;
|
|
handle_t *handle;
|
|
|
|
/*
|
|
* If the journal is still running, we have to write out superblock
|
|
* through the journal to avoid collisions of other journalled sb
|
|
* updates.
|
|
*
|
|
* We use directly jbd2 functions here to avoid recursing back into
|
|
* ext4 error handling code during handling of previous errors.
|
|
*/
|
|
if (!sb_rdonly(sbi->s_sb) && journal) {
|
|
struct buffer_head *sbh = sbi->s_sbh;
|
|
bool call_notify_err = false;
|
|
|
|
handle = jbd2_journal_start(journal, 1);
|
|
if (IS_ERR(handle))
|
|
goto write_directly;
|
|
if (jbd2_journal_get_write_access(handle, sbh)) {
|
|
jbd2_journal_stop(handle);
|
|
goto write_directly;
|
|
}
|
|
|
|
if (sbi->s_add_error_count > 0)
|
|
call_notify_err = true;
|
|
|
|
ext4_update_super(sbi->s_sb);
|
|
if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) {
|
|
ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "
|
|
"superblock detected");
|
|
clear_buffer_write_io_error(sbh);
|
|
set_buffer_uptodate(sbh);
|
|
}
|
|
|
|
if (jbd2_journal_dirty_metadata(handle, sbh)) {
|
|
jbd2_journal_stop(handle);
|
|
goto write_directly;
|
|
}
|
|
jbd2_journal_stop(handle);
|
|
|
|
if (call_notify_err)
|
|
ext4_notify_error_sysfs(sbi);
|
|
|
|
return;
|
|
}
|
|
write_directly:
|
|
/*
|
|
* Write through journal failed. Write sb directly to get error info
|
|
* out and hope for the best.
|
|
*/
|
|
ext4_commit_super(sbi->s_sb);
|
|
ext4_notify_error_sysfs(sbi);
|
|
}
|
|
|
|
#define ext4_error_ratelimit(sb) \
|
|
___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \
|
|
"EXT4-fs error")
|
|
|
|
void __ext4_error(struct super_block *sb, const char *function,
|
|
unsigned int line, bool force_ro, int error, __u64 block,
|
|
const char *fmt, ...)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (unlikely(ext4_forced_shutdown(sb)))
|
|
return;
|
|
|
|
trace_ext4_error(sb, function, line);
|
|
if (ext4_error_ratelimit(sb)) {
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
printk(KERN_CRIT
|
|
"EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",
|
|
sb->s_id, function, line, current->comm, &vaf);
|
|
va_end(args);
|
|
}
|
|
fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED);
|
|
|
|
ext4_handle_error(sb, force_ro, error, 0, block, function, line);
|
|
}
|
|
|
|
void __ext4_error_inode(struct inode *inode, const char *function,
|
|
unsigned int line, ext4_fsblk_t block, int error,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
struct va_format vaf;
|
|
|
|
if (unlikely(ext4_forced_shutdown(inode->i_sb)))
|
|
return;
|
|
|
|
trace_ext4_error(inode->i_sb, function, line);
|
|
if (ext4_error_ratelimit(inode->i_sb)) {
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
if (block)
|
|
printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "
|
|
"inode #%lu: block %llu: comm %s: %pV\n",
|
|
inode->i_sb->s_id, function, line, inode->i_ino,
|
|
block, current->comm, &vaf);
|
|
else
|
|
printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: "
|
|
"inode #%lu: comm %s: %pV\n",
|
|
inode->i_sb->s_id, function, line, inode->i_ino,
|
|
current->comm, &vaf);
|
|
va_end(args);
|
|
}
|
|
fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED);
|
|
|
|
ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block,
|
|
function, line);
|
|
}
|
|
|
|
void __ext4_error_file(struct file *file, const char *function,
|
|
unsigned int line, ext4_fsblk_t block,
|
|
const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
struct va_format vaf;
|
|
struct inode *inode = file_inode(file);
|
|
char pathname[80], *path;
|
|
|
|
if (unlikely(ext4_forced_shutdown(inode->i_sb)))
|
|
return;
|
|
|
|
trace_ext4_error(inode->i_sb, function, line);
|
|
if (ext4_error_ratelimit(inode->i_sb)) {
|
|
path = file_path(file, pathname, sizeof(pathname));
|
|
if (IS_ERR(path))
|
|
path = "(unknown)";
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
if (block)
|
|
printk(KERN_CRIT
|
|
"EXT4-fs error (device %s): %s:%d: inode #%lu: "
|
|
"block %llu: comm %s: path %s: %pV\n",
|
|
inode->i_sb->s_id, function, line, inode->i_ino,
|
|
block, current->comm, path, &vaf);
|
|
else
|
|
printk(KERN_CRIT
|
|
"EXT4-fs error (device %s): %s:%d: inode #%lu: "
|
|
"comm %s: path %s: %pV\n",
|
|
inode->i_sb->s_id, function, line, inode->i_ino,
|
|
current->comm, path, &vaf);
|
|
va_end(args);
|
|
}
|
|
fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED);
|
|
|
|
ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block,
|
|
function, line);
|
|
}
|
|
|
|
const char *ext4_decode_error(struct super_block *sb, int errno,
|
|
char nbuf[16])
|
|
{
|
|
char *errstr = NULL;
|
|
|
|
switch (errno) {
|
|
case -EFSCORRUPTED:
|
|
errstr = "Corrupt filesystem";
|
|
break;
|
|
case -EFSBADCRC:
|
|
errstr = "Filesystem failed CRC";
|
|
break;
|
|
case -EIO:
|
|
errstr = "IO failure";
|
|
break;
|
|
case -ENOMEM:
|
|
errstr = "Out of memory";
|
|
break;
|
|
case -EROFS:
|
|
if (!sb || (EXT4_SB(sb)->s_journal &&
|
|
EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT))
|
|
errstr = "Journal has aborted";
|
|
else
|
|
errstr = "Readonly filesystem";
|
|
break;
|
|
default:
|
|
/* If the caller passed in an extra buffer for unknown
|
|
* errors, textualise them now. Else we just return
|
|
* NULL. */
|
|
if (nbuf) {
|
|
/* Check for truncated error codes... */
|
|
if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
|
|
errstr = nbuf;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return errstr;
|
|
}
|
|
|
|
/* __ext4_std_error decodes expected errors from journaling functions
|
|
* automatically and invokes the appropriate error response. */
|
|
|
|
void __ext4_std_error(struct super_block *sb, const char *function,
|
|
unsigned int line, int errno)
|
|
{
|
|
char nbuf[16];
|
|
const char *errstr;
|
|
|
|
if (unlikely(ext4_forced_shutdown(sb)))
|
|
return;
|
|
|
|
/* Special case: if the error is EROFS, and we're not already
|
|
* inside a transaction, then there's really no point in logging
|
|
* an error. */
|
|
if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb))
|
|
return;
|
|
|
|
if (ext4_error_ratelimit(sb)) {
|
|
errstr = ext4_decode_error(sb, errno, nbuf);
|
|
printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n",
|
|
sb->s_id, function, line, errstr);
|
|
}
|
|
fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED);
|
|
|
|
ext4_handle_error(sb, false, -errno, 0, 0, function, line);
|
|
}
|
|
|
|
void __ext4_msg(struct super_block *sb,
|
|
const char *prefix, const char *fmt, ...)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (sb) {
|
|
atomic_inc(&EXT4_SB(sb)->s_msg_count);
|
|
if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state),
|
|
"EXT4-fs"))
|
|
return;
|
|
}
|
|
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
if (sb)
|
|
printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
|
|
else
|
|
printk("%sEXT4-fs: %pV\n", prefix, &vaf);
|
|
va_end(args);
|
|
}
|
|
|
|
static int ext4_warning_ratelimit(struct super_block *sb)
|
|
{
|
|
atomic_inc(&EXT4_SB(sb)->s_warning_count);
|
|
return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),
|
|
"EXT4-fs warning");
|
|
}
|
|
|
|
void __ext4_warning(struct super_block *sb, const char *function,
|
|
unsigned int line, const char *fmt, ...)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (!ext4_warning_ratelimit(sb))
|
|
return;
|
|
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",
|
|
sb->s_id, function, line, &vaf);
|
|
va_end(args);
|
|
}
|
|
|
|
void __ext4_warning_inode(const struct inode *inode, const char *function,
|
|
unsigned int line, const char *fmt, ...)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (!ext4_warning_ratelimit(inode->i_sb))
|
|
return;
|
|
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: "
|
|
"inode #%lu: comm %s: %pV\n", inode->i_sb->s_id,
|
|
function, line, inode->i_ino, current->comm, &vaf);
|
|
va_end(args);
|
|
}
|
|
|
|
void __ext4_grp_locked_error(const char *function, unsigned int line,
|
|
struct super_block *sb, ext4_group_t grp,
|
|
unsigned long ino, ext4_fsblk_t block,
|
|
const char *fmt, ...)
|
|
__releases(bitlock)
|
|
__acquires(bitlock)
|
|
{
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (unlikely(ext4_forced_shutdown(sb)))
|
|
return;
|
|
|
|
trace_ext4_error(sb, function, line);
|
|
if (ext4_error_ratelimit(sb)) {
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ",
|
|
sb->s_id, function, line, grp);
|
|
if (ino)
|
|
printk(KERN_CONT "inode %lu: ", ino);
|
|
if (block)
|
|
printk(KERN_CONT "block %llu:",
|
|
(unsigned long long) block);
|
|
printk(KERN_CONT "%pV\n", &vaf);
|
|
va_end(args);
|
|
}
|
|
|
|
if (test_opt(sb, ERRORS_CONT)) {
|
|
if (test_opt(sb, WARN_ON_ERROR))
|
|
WARN_ON_ONCE(1);
|
|
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
|
|
if (!bdev_read_only(sb->s_bdev)) {
|
|
save_error_info(sb, EFSCORRUPTED, ino, block, function,
|
|
line);
|
|
schedule_work(&EXT4_SB(sb)->s_sb_upd_work);
|
|
}
|
|
return;
|
|
}
|
|
ext4_unlock_group(sb, grp);
|
|
ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line);
|
|
/*
|
|
* We only get here in the ERRORS_RO case; relocking the group
|
|
* may be dangerous, but nothing bad will happen since the
|
|
* filesystem will have already been marked read/only and the
|
|
* journal has been aborted. We return 1 as a hint to callers
|
|
* who might what to use the return value from
|
|
* ext4_grp_locked_error() to distinguish between the
|
|
* ERRORS_CONT and ERRORS_RO case, and perhaps return more
|
|
* aggressively from the ext4 function in question, with a
|
|
* more appropriate error code.
|
|
*/
|
|
ext4_lock_group(sb, grp);
|
|
return;
|
|
}
|
|
|
|
void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
|
|
ext4_group_t group,
|
|
unsigned int flags)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_group_info *grp = ext4_get_group_info(sb, group);
|
|
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL);
|
|
int ret;
|
|
|
|
if (!grp || !gdp)
|
|
return;
|
|
if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) {
|
|
ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT,
|
|
&grp->bb_state);
|
|
if (!ret)
|
|
percpu_counter_sub(&sbi->s_freeclusters_counter,
|
|
grp->bb_free);
|
|
}
|
|
|
|
if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) {
|
|
ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT,
|
|
&grp->bb_state);
|
|
if (!ret && gdp) {
|
|
int count;
|
|
|
|
count = ext4_free_inodes_count(sb, gdp);
|
|
percpu_counter_sub(&sbi->s_freeinodes_counter,
|
|
count);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ext4_update_dynamic_rev(struct super_block *sb)
|
|
{
|
|
struct ext4_super_block *es = EXT4_SB(sb)->s_es;
|
|
|
|
if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV)
|
|
return;
|
|
|
|
ext4_warning(sb,
|
|
"updating to rev %d because of new feature flag, "
|
|
"running e2fsck is recommended",
|
|
EXT4_DYNAMIC_REV);
|
|
|
|
es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO);
|
|
es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE);
|
|
es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV);
|
|
/* leave es->s_feature_*compat flags alone */
|
|
/* es->s_uuid will be set by e2fsck if empty */
|
|
|
|
/*
|
|
* The rest of the superblock fields should be zero, and if not it
|
|
* means they are likely already in use, so leave them alone. We
|
|
* can leave it up to e2fsck to clean up any inconsistencies there.
|
|
*/
|
|
}
|
|
|
|
static inline struct inode *orphan_list_entry(struct list_head *l)
|
|
{
|
|
return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode;
|
|
}
|
|
|
|
static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi)
|
|
{
|
|
struct list_head *l;
|
|
|
|
ext4_msg(sb, KERN_ERR, "sb orphan head is %d",
|
|
le32_to_cpu(sbi->s_es->s_last_orphan));
|
|
|
|
printk(KERN_ERR "sb_info orphan list:\n");
|
|
list_for_each(l, &sbi->s_orphan) {
|
|
struct inode *inode = orphan_list_entry(l);
|
|
printk(KERN_ERR " "
|
|
"inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
|
|
inode->i_sb->s_id, inode->i_ino, inode,
|
|
inode->i_mode, inode->i_nlink,
|
|
NEXT_ORPHAN(inode));
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
static int ext4_quota_off(struct super_block *sb, int type);
|
|
|
|
static inline void ext4_quotas_off(struct super_block *sb, int type)
|
|
{
|
|
BUG_ON(type > EXT4_MAXQUOTAS);
|
|
|
|
/* Use our quota_off function to clear inode flags etc. */
|
|
for (type--; type >= 0; type--)
|
|
ext4_quota_off(sb, type);
|
|
}
|
|
|
|
/*
|
|
* This is a helper function which is used in the mount/remount
|
|
* codepaths (which holds s_umount) to fetch the quota file name.
|
|
*/
|
|
static inline char *get_qf_name(struct super_block *sb,
|
|
struct ext4_sb_info *sbi,
|
|
int type)
|
|
{
|
|
return rcu_dereference_protected(sbi->s_qf_names[type],
|
|
lockdep_is_held(&sb->s_umount));
|
|
}
|
|
#else
|
|
static inline void ext4_quotas_off(struct super_block *sb, int type)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int ext4_percpu_param_init(struct ext4_sb_info *sbi)
|
|
{
|
|
ext4_fsblk_t block;
|
|
int err;
|
|
|
|
block = ext4_count_free_clusters(sbi->s_sb);
|
|
ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block));
|
|
err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
|
|
GFP_KERNEL);
|
|
if (!err) {
|
|
unsigned long freei = ext4_count_free_inodes(sbi->s_sb);
|
|
sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
|
|
err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
|
|
GFP_KERNEL);
|
|
}
|
|
if (!err)
|
|
err = percpu_counter_init(&sbi->s_dirs_counter,
|
|
ext4_count_dirs(sbi->s_sb), GFP_KERNEL);
|
|
if (!err)
|
|
err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,
|
|
GFP_KERNEL);
|
|
if (!err)
|
|
err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,
|
|
GFP_KERNEL);
|
|
if (!err)
|
|
err = percpu_init_rwsem(&sbi->s_writepages_rwsem);
|
|
|
|
if (err)
|
|
ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory");
|
|
|
|
return err;
|
|
}
|
|
|
|
static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi)
|
|
{
|
|
percpu_counter_destroy(&sbi->s_freeclusters_counter);
|
|
percpu_counter_destroy(&sbi->s_freeinodes_counter);
|
|
percpu_counter_destroy(&sbi->s_dirs_counter);
|
|
percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
|
|
percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);
|
|
percpu_free_rwsem(&sbi->s_writepages_rwsem);
|
|
}
|
|
|
|
static void ext4_group_desc_free(struct ext4_sb_info *sbi)
|
|
{
|
|
struct buffer_head **group_desc;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
group_desc = rcu_dereference(sbi->s_group_desc);
|
|
for (i = 0; i < sbi->s_gdb_count; i++)
|
|
brelse(group_desc[i]);
|
|
kvfree(group_desc);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void ext4_flex_groups_free(struct ext4_sb_info *sbi)
|
|
{
|
|
struct flex_groups **flex_groups;
|
|
int i;
|
|
|
|
rcu_read_lock();
|
|
flex_groups = rcu_dereference(sbi->s_flex_groups);
|
|
if (flex_groups) {
|
|
for (i = 0; i < sbi->s_flex_groups_allocated; i++)
|
|
kvfree(flex_groups[i]);
|
|
kvfree(flex_groups);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void ext4_put_super(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
int aborted = 0;
|
|
int err;
|
|
|
|
/*
|
|
* Unregister sysfs before destroying jbd2 journal.
|
|
* Since we could still access attr_journal_task attribute via sysfs
|
|
* path which could have sbi->s_journal->j_task as NULL
|
|
* Unregister sysfs before flush sbi->s_sb_upd_work.
|
|
* Since user may read /proc/fs/ext4/xx/mb_groups during umount, If
|
|
* read metadata verify failed then will queue error work.
|
|
* update_super_work will call start_this_handle may trigger
|
|
* BUG_ON.
|
|
*/
|
|
ext4_unregister_sysfs(sb);
|
|
|
|
if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount"))
|
|
ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.",
|
|
&sb->s_uuid);
|
|
|
|
ext4_unregister_li_request(sb);
|
|
ext4_quotas_off(sb, EXT4_MAXQUOTAS);
|
|
|
|
flush_work(&sbi->s_sb_upd_work);
|
|
destroy_workqueue(sbi->rsv_conversion_wq);
|
|
ext4_release_orphan_info(sb);
|
|
|
|
if (sbi->s_journal) {
|
|
aborted = is_journal_aborted(sbi->s_journal);
|
|
err = jbd2_journal_destroy(sbi->s_journal);
|
|
sbi->s_journal = NULL;
|
|
if ((err < 0) && !aborted) {
|
|
ext4_abort(sb, -err, "Couldn't clean up the journal");
|
|
}
|
|
}
|
|
|
|
ext4_es_unregister_shrinker(sbi);
|
|
timer_shutdown_sync(&sbi->s_err_report);
|
|
ext4_release_system_zone(sb);
|
|
ext4_mb_release(sb);
|
|
ext4_ext_release(sb);
|
|
|
|
if (!sb_rdonly(sb) && !aborted) {
|
|
ext4_clear_feature_journal_needs_recovery(sb);
|
|
ext4_clear_feature_orphan_present(sb);
|
|
es->s_state = cpu_to_le16(sbi->s_mount_state);
|
|
}
|
|
if (!sb_rdonly(sb))
|
|
ext4_commit_super(sb);
|
|
|
|
ext4_group_desc_free(sbi);
|
|
ext4_flex_groups_free(sbi);
|
|
ext4_percpu_param_destroy(sbi);
|
|
#ifdef CONFIG_QUOTA
|
|
for (int i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
kfree(get_qf_name(sb, sbi, i));
|
|
#endif
|
|
|
|
/* Debugging code just in case the in-memory inode orphan list
|
|
* isn't empty. The on-disk one can be non-empty if we've
|
|
* detected an error and taken the fs readonly, but the
|
|
* in-memory list had better be clean by this point. */
|
|
if (!list_empty(&sbi->s_orphan))
|
|
dump_orphan_list(sb, sbi);
|
|
ASSERT(list_empty(&sbi->s_orphan));
|
|
|
|
sync_blockdev(sb->s_bdev);
|
|
invalidate_bdev(sb->s_bdev);
|
|
if (sbi->s_journal_bdev_file) {
|
|
/*
|
|
* Invalidate the journal device's buffers. We don't want them
|
|
* floating about in memory - the physical journal device may
|
|
* hotswapped, and it breaks the `ro-after' testing code.
|
|
*/
|
|
sync_blockdev(file_bdev(sbi->s_journal_bdev_file));
|
|
invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));
|
|
}
|
|
|
|
ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
|
|
sbi->s_ea_inode_cache = NULL;
|
|
|
|
ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
|
|
sbi->s_ea_block_cache = NULL;
|
|
|
|
ext4_stop_mmpd(sbi);
|
|
|
|
brelse(sbi->s_sbh);
|
|
sb->s_fs_info = NULL;
|
|
/*
|
|
* Now that we are completely done shutting down the
|
|
* superblock, we need to actually destroy the kobject.
|
|
*/
|
|
kobject_put(&sbi->s_kobj);
|
|
wait_for_completion(&sbi->s_kobj_unregister);
|
|
if (sbi->s_chksum_driver)
|
|
crypto_free_shash(sbi->s_chksum_driver);
|
|
kfree(sbi->s_blockgroup_lock);
|
|
fs_put_dax(sbi->s_daxdev, NULL);
|
|
fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);
|
|
#if IS_ENABLED(CONFIG_UNICODE)
|
|
utf8_unload(sb->s_encoding);
|
|
#endif
|
|
kfree(sbi);
|
|
}
|
|
|
|
static struct kmem_cache *ext4_inode_cachep;
|
|
|
|
/*
|
|
* Called inside transaction, so use GFP_NOFS
|
|
*/
|
|
static struct inode *ext4_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct ext4_inode_info *ei;
|
|
|
|
ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS);
|
|
if (!ei)
|
|
return NULL;
|
|
|
|
inode_set_iversion(&ei->vfs_inode, 1);
|
|
ei->i_flags = 0;
|
|
spin_lock_init(&ei->i_raw_lock);
|
|
ei->i_prealloc_node = RB_ROOT;
|
|
atomic_set(&ei->i_prealloc_active, 0);
|
|
rwlock_init(&ei->i_prealloc_lock);
|
|
ext4_es_init_tree(&ei->i_es_tree);
|
|
rwlock_init(&ei->i_es_lock);
|
|
INIT_LIST_HEAD(&ei->i_es_list);
|
|
ei->i_es_all_nr = 0;
|
|
ei->i_es_shk_nr = 0;
|
|
ei->i_es_shrink_lblk = 0;
|
|
ei->i_reserved_data_blocks = 0;
|
|
spin_lock_init(&(ei->i_block_reservation_lock));
|
|
ext4_init_pending_tree(&ei->i_pending_tree);
|
|
#ifdef CONFIG_QUOTA
|
|
ei->i_reserved_quota = 0;
|
|
memset(&ei->i_dquot, 0, sizeof(ei->i_dquot));
|
|
#endif
|
|
ei->jinode = NULL;
|
|
INIT_LIST_HEAD(&ei->i_rsv_conversion_list);
|
|
spin_lock_init(&ei->i_completed_io_lock);
|
|
ei->i_sync_tid = 0;
|
|
ei->i_datasync_tid = 0;
|
|
atomic_set(&ei->i_unwritten, 0);
|
|
INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);
|
|
ext4_fc_init_inode(&ei->vfs_inode);
|
|
mutex_init(&ei->i_fc_lock);
|
|
return &ei->vfs_inode;
|
|
}
|
|
|
|
static int ext4_drop_inode(struct inode *inode)
|
|
{
|
|
int drop = generic_drop_inode(inode);
|
|
|
|
if (!drop)
|
|
drop = fscrypt_drop_inode(inode);
|
|
|
|
trace_ext4_drop_inode(inode, drop);
|
|
return drop;
|
|
}
|
|
|
|
static void ext4_free_in_core_inode(struct inode *inode)
|
|
{
|
|
fscrypt_free_inode(inode);
|
|
if (!list_empty(&(EXT4_I(inode)->i_fc_list))) {
|
|
pr_warn("%s: inode %ld still in fc list",
|
|
__func__, inode->i_ino);
|
|
}
|
|
kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
|
|
}
|
|
|
|
static void ext4_destroy_inode(struct inode *inode)
|
|
{
|
|
if (!list_empty(&(EXT4_I(inode)->i_orphan))) {
|
|
ext4_msg(inode->i_sb, KERN_ERR,
|
|
"Inode %lu (%p): orphan list check failed!",
|
|
inode->i_ino, EXT4_I(inode));
|
|
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
|
|
EXT4_I(inode), sizeof(struct ext4_inode_info),
|
|
true);
|
|
dump_stack();
|
|
}
|
|
|
|
if (EXT4_I(inode)->i_reserved_data_blocks)
|
|
ext4_msg(inode->i_sb, KERN_ERR,
|
|
"Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!",
|
|
inode->i_ino, EXT4_I(inode),
|
|
EXT4_I(inode)->i_reserved_data_blocks);
|
|
}
|
|
|
|
static void ext4_shutdown(struct super_block *sb)
|
|
{
|
|
ext4_force_shutdown(sb, EXT4_GOING_FLAGS_NOLOGFLUSH);
|
|
}
|
|
|
|
static void init_once(void *foo)
|
|
{
|
|
struct ext4_inode_info *ei = foo;
|
|
|
|
INIT_LIST_HEAD(&ei->i_orphan);
|
|
init_rwsem(&ei->xattr_sem);
|
|
init_rwsem(&ei->i_data_sem);
|
|
inode_init_once(&ei->vfs_inode);
|
|
ext4_fc_init_inode(&ei->vfs_inode);
|
|
}
|
|
|
|
static int __init init_inodecache(void)
|
|
{
|
|
ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache",
|
|
sizeof(struct ext4_inode_info), 0,
|
|
SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT,
|
|
offsetof(struct ext4_inode_info, i_data),
|
|
sizeof_field(struct ext4_inode_info, i_data),
|
|
init_once);
|
|
if (ext4_inode_cachep == NULL)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static void destroy_inodecache(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
* destroy cache.
|
|
*/
|
|
rcu_barrier();
|
|
kmem_cache_destroy(ext4_inode_cachep);
|
|
}
|
|
|
|
void ext4_clear_inode(struct inode *inode)
|
|
{
|
|
ext4_fc_del(inode);
|
|
invalidate_inode_buffers(inode);
|
|
clear_inode(inode);
|
|
ext4_discard_preallocations(inode);
|
|
ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
|
|
dquot_drop(inode);
|
|
if (EXT4_I(inode)->jinode) {
|
|
jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
|
|
EXT4_I(inode)->jinode);
|
|
jbd2_free_inode(EXT4_I(inode)->jinode);
|
|
EXT4_I(inode)->jinode = NULL;
|
|
}
|
|
fscrypt_put_encryption_info(inode);
|
|
fsverity_cleanup_inode(inode);
|
|
}
|
|
|
|
static struct inode *ext4_nfs_get_inode(struct super_block *sb,
|
|
u64 ino, u32 generation)
|
|
{
|
|
struct inode *inode;
|
|
|
|
/*
|
|
* Currently we don't know the generation for parent directory, so
|
|
* a generation of 0 means "accept any"
|
|
*/
|
|
inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE);
|
|
if (IS_ERR(inode))
|
|
return ERR_CAST(inode);
|
|
if (generation && inode->i_generation != generation) {
|
|
iput(inode);
|
|
return ERR_PTR(-ESTALE);
|
|
}
|
|
|
|
return inode;
|
|
}
|
|
|
|
static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type)
|
|
{
|
|
return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
|
|
ext4_nfs_get_inode);
|
|
}
|
|
|
|
static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type)
|
|
{
|
|
return generic_fh_to_parent(sb, fid, fh_len, fh_type,
|
|
ext4_nfs_get_inode);
|
|
}
|
|
|
|
static int ext4_nfs_commit_metadata(struct inode *inode)
|
|
{
|
|
struct writeback_control wbc = {
|
|
.sync_mode = WB_SYNC_ALL
|
|
};
|
|
|
|
trace_ext4_nfs_commit_metadata(inode);
|
|
return ext4_write_inode(inode, &wbc);
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
static const char * const quotatypes[] = INITQFNAMES;
|
|
#define QTYPE2NAME(t) (quotatypes[t])
|
|
|
|
static int ext4_write_dquot(struct dquot *dquot);
|
|
static int ext4_acquire_dquot(struct dquot *dquot);
|
|
static int ext4_release_dquot(struct dquot *dquot);
|
|
static int ext4_mark_dquot_dirty(struct dquot *dquot);
|
|
static int ext4_write_info(struct super_block *sb, int type);
|
|
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
|
|
const struct path *path);
|
|
static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
|
|
size_t len, loff_t off);
|
|
static ssize_t ext4_quota_write(struct super_block *sb, int type,
|
|
const char *data, size_t len, loff_t off);
|
|
static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
|
|
unsigned int flags);
|
|
|
|
static struct dquot __rcu **ext4_get_dquots(struct inode *inode)
|
|
{
|
|
return EXT4_I(inode)->i_dquot;
|
|
}
|
|
|
|
static const struct dquot_operations ext4_quota_operations = {
|
|
.get_reserved_space = ext4_get_reserved_space,
|
|
.write_dquot = ext4_write_dquot,
|
|
.acquire_dquot = ext4_acquire_dquot,
|
|
.release_dquot = ext4_release_dquot,
|
|
.mark_dirty = ext4_mark_dquot_dirty,
|
|
.write_info = ext4_write_info,
|
|
.alloc_dquot = dquot_alloc,
|
|
.destroy_dquot = dquot_destroy,
|
|
.get_projid = ext4_get_projid,
|
|
.get_inode_usage = ext4_get_inode_usage,
|
|
.get_next_id = dquot_get_next_id,
|
|
};
|
|
|
|
static const struct quotactl_ops ext4_qctl_operations = {
|
|
.quota_on = ext4_quota_on,
|
|
.quota_off = ext4_quota_off,
|
|
.quota_sync = dquot_quota_sync,
|
|
.get_state = dquot_get_state,
|
|
.set_info = dquot_set_dqinfo,
|
|
.get_dqblk = dquot_get_dqblk,
|
|
.set_dqblk = dquot_set_dqblk,
|
|
.get_nextdqblk = dquot_get_next_dqblk,
|
|
};
|
|
#endif
|
|
|
|
static const struct super_operations ext4_sops = {
|
|
.alloc_inode = ext4_alloc_inode,
|
|
.free_inode = ext4_free_in_core_inode,
|
|
.destroy_inode = ext4_destroy_inode,
|
|
.write_inode = ext4_write_inode,
|
|
.dirty_inode = ext4_dirty_inode,
|
|
.drop_inode = ext4_drop_inode,
|
|
.evict_inode = ext4_evict_inode,
|
|
.put_super = ext4_put_super,
|
|
.sync_fs = ext4_sync_fs,
|
|
.freeze_fs = ext4_freeze,
|
|
.unfreeze_fs = ext4_unfreeze,
|
|
.statfs = ext4_statfs,
|
|
.show_options = ext4_show_options,
|
|
.shutdown = ext4_shutdown,
|
|
#ifdef CONFIG_QUOTA
|
|
.quota_read = ext4_quota_read,
|
|
.quota_write = ext4_quota_write,
|
|
.get_dquots = ext4_get_dquots,
|
|
#endif
|
|
};
|
|
|
|
static const struct export_operations ext4_export_ops = {
|
|
.encode_fh = generic_encode_ino32_fh,
|
|
.fh_to_dentry = ext4_fh_to_dentry,
|
|
.fh_to_parent = ext4_fh_to_parent,
|
|
.get_parent = ext4_get_parent,
|
|
.commit_metadata = ext4_nfs_commit_metadata,
|
|
};
|
|
|
|
enum {
|
|
Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
|
|
Opt_resgid, Opt_resuid, Opt_sb,
|
|
Opt_nouid32, Opt_debug, Opt_removed,
|
|
Opt_user_xattr, Opt_acl,
|
|
Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload,
|
|
Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev,
|
|
Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit,
|
|
Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
|
|
Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption,
|
|
Opt_inlinecrypt,
|
|
Opt_usrjquota, Opt_grpjquota, Opt_quota,
|
|
Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
|
|
Opt_usrquota, Opt_grpquota, Opt_prjquota,
|
|
Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never,
|
|
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error,
|
|
Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize,
|
|
Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
|
|
Opt_inode_readahead_blks, Opt_journal_ioprio,
|
|
Opt_dioread_nolock, Opt_dioread_lock,
|
|
Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
|
|
Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache,
|
|
Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan,
|
|
Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type,
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
Opt_fc_debug_max_replay, Opt_fc_debug_force
|
|
#endif
|
|
};
|
|
|
|
static const struct constant_table ext4_param_errors[] = {
|
|
{"continue", EXT4_MOUNT_ERRORS_CONT},
|
|
{"panic", EXT4_MOUNT_ERRORS_PANIC},
|
|
{"remount-ro", EXT4_MOUNT_ERRORS_RO},
|
|
{}
|
|
};
|
|
|
|
static const struct constant_table ext4_param_data[] = {
|
|
{"journal", EXT4_MOUNT_JOURNAL_DATA},
|
|
{"ordered", EXT4_MOUNT_ORDERED_DATA},
|
|
{"writeback", EXT4_MOUNT_WRITEBACK_DATA},
|
|
{}
|
|
};
|
|
|
|
static const struct constant_table ext4_param_data_err[] = {
|
|
{"abort", Opt_data_err_abort},
|
|
{"ignore", Opt_data_err_ignore},
|
|
{}
|
|
};
|
|
|
|
static const struct constant_table ext4_param_jqfmt[] = {
|
|
{"vfsold", QFMT_VFS_OLD},
|
|
{"vfsv0", QFMT_VFS_V0},
|
|
{"vfsv1", QFMT_VFS_V1},
|
|
{}
|
|
};
|
|
|
|
static const struct constant_table ext4_param_dax[] = {
|
|
{"always", Opt_dax_always},
|
|
{"inode", Opt_dax_inode},
|
|
{"never", Opt_dax_never},
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Mount option specification
|
|
* We don't use fsparam_flag_no because of the way we set the
|
|
* options and the way we show them in _ext4_show_options(). To
|
|
* keep the changes to a minimum, let's keep the negative options
|
|
* separate for now.
|
|
*/
|
|
static const struct fs_parameter_spec ext4_param_specs[] = {
|
|
fsparam_flag ("bsddf", Opt_bsd_df),
|
|
fsparam_flag ("minixdf", Opt_minix_df),
|
|
fsparam_flag ("grpid", Opt_grpid),
|
|
fsparam_flag ("bsdgroups", Opt_grpid),
|
|
fsparam_flag ("nogrpid", Opt_nogrpid),
|
|
fsparam_flag ("sysvgroups", Opt_nogrpid),
|
|
fsparam_gid ("resgid", Opt_resgid),
|
|
fsparam_uid ("resuid", Opt_resuid),
|
|
fsparam_u32 ("sb", Opt_sb),
|
|
fsparam_enum ("errors", Opt_errors, ext4_param_errors),
|
|
fsparam_flag ("nouid32", Opt_nouid32),
|
|
fsparam_flag ("debug", Opt_debug),
|
|
fsparam_flag ("oldalloc", Opt_removed),
|
|
fsparam_flag ("orlov", Opt_removed),
|
|
fsparam_flag ("user_xattr", Opt_user_xattr),
|
|
fsparam_flag ("acl", Opt_acl),
|
|
fsparam_flag ("norecovery", Opt_noload),
|
|
fsparam_flag ("noload", Opt_noload),
|
|
fsparam_flag ("bh", Opt_removed),
|
|
fsparam_flag ("nobh", Opt_removed),
|
|
fsparam_u32 ("commit", Opt_commit),
|
|
fsparam_u32 ("min_batch_time", Opt_min_batch_time),
|
|
fsparam_u32 ("max_batch_time", Opt_max_batch_time),
|
|
fsparam_u32 ("journal_dev", Opt_journal_dev),
|
|
fsparam_bdev ("journal_path", Opt_journal_path),
|
|
fsparam_flag ("journal_checksum", Opt_journal_checksum),
|
|
fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum),
|
|
fsparam_flag ("journal_async_commit",Opt_journal_async_commit),
|
|
fsparam_flag ("abort", Opt_abort),
|
|
fsparam_enum ("data", Opt_data, ext4_param_data),
|
|
fsparam_enum ("data_err", Opt_data_err,
|
|
ext4_param_data_err),
|
|
fsparam_string_empty
|
|
("usrjquota", Opt_usrjquota),
|
|
fsparam_string_empty
|
|
("grpjquota", Opt_grpjquota),
|
|
fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt),
|
|
fsparam_flag ("grpquota", Opt_grpquota),
|
|
fsparam_flag ("quota", Opt_quota),
|
|
fsparam_flag ("noquota", Opt_noquota),
|
|
fsparam_flag ("usrquota", Opt_usrquota),
|
|
fsparam_flag ("prjquota", Opt_prjquota),
|
|
fsparam_flag ("barrier", Opt_barrier),
|
|
fsparam_u32 ("barrier", Opt_barrier),
|
|
fsparam_flag ("nobarrier", Opt_nobarrier),
|
|
fsparam_flag ("i_version", Opt_removed),
|
|
fsparam_flag ("dax", Opt_dax),
|
|
fsparam_enum ("dax", Opt_dax_type, ext4_param_dax),
|
|
fsparam_u32 ("stripe", Opt_stripe),
|
|
fsparam_flag ("delalloc", Opt_delalloc),
|
|
fsparam_flag ("nodelalloc", Opt_nodelalloc),
|
|
fsparam_flag ("warn_on_error", Opt_warn_on_error),
|
|
fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error),
|
|
fsparam_u32 ("debug_want_extra_isize",
|
|
Opt_debug_want_extra_isize),
|
|
fsparam_flag ("mblk_io_submit", Opt_removed),
|
|
fsparam_flag ("nomblk_io_submit", Opt_removed),
|
|
fsparam_flag ("block_validity", Opt_block_validity),
|
|
fsparam_flag ("noblock_validity", Opt_noblock_validity),
|
|
fsparam_u32 ("inode_readahead_blks",
|
|
Opt_inode_readahead_blks),
|
|
fsparam_u32 ("journal_ioprio", Opt_journal_ioprio),
|
|
fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc),
|
|
fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc),
|
|
fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc),
|
|
fsparam_flag ("dioread_nolock", Opt_dioread_nolock),
|
|
fsparam_flag ("nodioread_nolock", Opt_dioread_lock),
|
|
fsparam_flag ("dioread_lock", Opt_dioread_lock),
|
|
fsparam_flag ("discard", Opt_discard),
|
|
fsparam_flag ("nodiscard", Opt_nodiscard),
|
|
fsparam_u32 ("init_itable", Opt_init_itable),
|
|
fsparam_flag ("init_itable", Opt_init_itable),
|
|
fsparam_flag ("noinit_itable", Opt_noinit_itable),
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
fsparam_flag ("fc_debug_force", Opt_fc_debug_force),
|
|
fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay),
|
|
#endif
|
|
fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb),
|
|
fsparam_flag ("test_dummy_encryption",
|
|
Opt_test_dummy_encryption),
|
|
fsparam_string ("test_dummy_encryption",
|
|
Opt_test_dummy_encryption),
|
|
fsparam_flag ("inlinecrypt", Opt_inlinecrypt),
|
|
fsparam_flag ("nombcache", Opt_nombcache),
|
|
fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */
|
|
fsparam_flag ("prefetch_block_bitmaps",
|
|
Opt_removed),
|
|
fsparam_flag ("no_prefetch_block_bitmaps",
|
|
Opt_no_prefetch_block_bitmaps),
|
|
fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan),
|
|
fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */
|
|
fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */
|
|
fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */
|
|
fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */
|
|
fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */
|
|
{}
|
|
};
|
|
|
|
#define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3))
|
|
|
|
#define MOPT_SET 0x0001
|
|
#define MOPT_CLEAR 0x0002
|
|
#define MOPT_NOSUPPORT 0x0004
|
|
#define MOPT_EXPLICIT 0x0008
|
|
#ifdef CONFIG_QUOTA
|
|
#define MOPT_Q 0
|
|
#define MOPT_QFMT 0x0010
|
|
#else
|
|
#define MOPT_Q MOPT_NOSUPPORT
|
|
#define MOPT_QFMT MOPT_NOSUPPORT
|
|
#endif
|
|
#define MOPT_NO_EXT2 0x0020
|
|
#define MOPT_NO_EXT3 0x0040
|
|
#define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3)
|
|
#define MOPT_SKIP 0x0080
|
|
#define MOPT_2 0x0100
|
|
|
|
static const struct mount_opts {
|
|
int token;
|
|
int mount_opt;
|
|
int flags;
|
|
} ext4_mount_opts[] = {
|
|
{Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET},
|
|
{Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR},
|
|
{Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET},
|
|
{Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR},
|
|
{Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET},
|
|
{Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR},
|
|
{Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK,
|
|
MOPT_EXT4_ONLY | MOPT_SET},
|
|
{Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK,
|
|
MOPT_EXT4_ONLY | MOPT_CLEAR},
|
|
{Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET},
|
|
{Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR},
|
|
{Opt_delalloc, EXT4_MOUNT_DELALLOC,
|
|
MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT},
|
|
{Opt_nodelalloc, EXT4_MOUNT_DELALLOC,
|
|
MOPT_EXT4_ONLY | MOPT_CLEAR},
|
|
{Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET},
|
|
{Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR},
|
|
{Opt_commit, 0, MOPT_NO_EXT2},
|
|
{Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,
|
|
MOPT_EXT4_ONLY | MOPT_CLEAR},
|
|
{Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM,
|
|
MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT},
|
|
{Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT |
|
|
EXT4_MOUNT_JOURNAL_CHECKSUM),
|
|
MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT},
|
|
{Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET},
|
|
{Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2},
|
|
{Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET},
|
|
{Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR},
|
|
{Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET},
|
|
{Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR},
|
|
{Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR},
|
|
{Opt_dax_type, 0, MOPT_EXT4_ONLY},
|
|
{Opt_journal_dev, 0, MOPT_NO_EXT2},
|
|
{Opt_journal_path, 0, MOPT_NO_EXT2},
|
|
{Opt_journal_ioprio, 0, MOPT_NO_EXT2},
|
|
{Opt_data, 0, MOPT_NO_EXT2},
|
|
{Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET},
|
|
#ifdef CONFIG_EXT4_FS_POSIX_ACL
|
|
{Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET},
|
|
#else
|
|
{Opt_acl, 0, MOPT_NOSUPPORT},
|
|
#endif
|
|
{Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET},
|
|
{Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET},
|
|
{Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q},
|
|
{Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA,
|
|
MOPT_SET | MOPT_Q},
|
|
{Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA,
|
|
MOPT_SET | MOPT_Q},
|
|
{Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA,
|
|
MOPT_SET | MOPT_Q},
|
|
{Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
|
|
EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA),
|
|
MOPT_CLEAR | MOPT_Q},
|
|
{Opt_usrjquota, 0, MOPT_Q},
|
|
{Opt_grpjquota, 0, MOPT_Q},
|
|
{Opt_jqfmt, 0, MOPT_QFMT},
|
|
{Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET},
|
|
{Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS,
|
|
MOPT_SET},
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
{Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT,
|
|
MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY},
|
|
#endif
|
|
{Opt_abort, EXT4_MOUNT2_ABORT, MOPT_SET | MOPT_2},
|
|
{Opt_err, 0, 0}
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_UNICODE)
|
|
static const struct ext4_sb_encodings {
|
|
__u16 magic;
|
|
char *name;
|
|
unsigned int version;
|
|
} ext4_sb_encoding_map[] = {
|
|
{EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
|
|
};
|
|
|
|
static const struct ext4_sb_encodings *
|
|
ext4_sb_read_encoding(const struct ext4_super_block *es)
|
|
{
|
|
__u16 magic = le16_to_cpu(es->s_encoding);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++)
|
|
if (magic == ext4_sb_encoding_map[i].magic)
|
|
return &ext4_sb_encoding_map[i];
|
|
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#define EXT4_SPEC_JQUOTA (1 << 0)
|
|
#define EXT4_SPEC_JQFMT (1 << 1)
|
|
#define EXT4_SPEC_DATAJ (1 << 2)
|
|
#define EXT4_SPEC_SB_BLOCK (1 << 3)
|
|
#define EXT4_SPEC_JOURNAL_DEV (1 << 4)
|
|
#define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5)
|
|
#define EXT4_SPEC_s_want_extra_isize (1 << 7)
|
|
#define EXT4_SPEC_s_max_batch_time (1 << 8)
|
|
#define EXT4_SPEC_s_min_batch_time (1 << 9)
|
|
#define EXT4_SPEC_s_inode_readahead_blks (1 << 10)
|
|
#define EXT4_SPEC_s_li_wait_mult (1 << 11)
|
|
#define EXT4_SPEC_s_max_dir_size_kb (1 << 12)
|
|
#define EXT4_SPEC_s_stripe (1 << 13)
|
|
#define EXT4_SPEC_s_resuid (1 << 14)
|
|
#define EXT4_SPEC_s_resgid (1 << 15)
|
|
#define EXT4_SPEC_s_commit_interval (1 << 16)
|
|
#define EXT4_SPEC_s_fc_debug_max_replay (1 << 17)
|
|
#define EXT4_SPEC_s_sb_block (1 << 18)
|
|
#define EXT4_SPEC_mb_optimize_scan (1 << 19)
|
|
|
|
struct ext4_fs_context {
|
|
char *s_qf_names[EXT4_MAXQUOTAS];
|
|
struct fscrypt_dummy_policy dummy_enc_policy;
|
|
int s_jquota_fmt; /* Format of quota to use */
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
int s_fc_debug_max_replay;
|
|
#endif
|
|
unsigned short qname_spec;
|
|
unsigned long vals_s_flags; /* Bits to set in s_flags */
|
|
unsigned long mask_s_flags; /* Bits changed in s_flags */
|
|
unsigned long journal_devnum;
|
|
unsigned long s_commit_interval;
|
|
unsigned long s_stripe;
|
|
unsigned int s_inode_readahead_blks;
|
|
unsigned int s_want_extra_isize;
|
|
unsigned int s_li_wait_mult;
|
|
unsigned int s_max_dir_size_kb;
|
|
unsigned int journal_ioprio;
|
|
unsigned int vals_s_mount_opt;
|
|
unsigned int mask_s_mount_opt;
|
|
unsigned int vals_s_mount_opt2;
|
|
unsigned int mask_s_mount_opt2;
|
|
unsigned int opt_flags; /* MOPT flags */
|
|
unsigned int spec;
|
|
u32 s_max_batch_time;
|
|
u32 s_min_batch_time;
|
|
kuid_t s_resuid;
|
|
kgid_t s_resgid;
|
|
ext4_fsblk_t s_sb_block;
|
|
};
|
|
|
|
static void ext4_fc_free(struct fs_context *fc)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
int i;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
kfree(ctx->s_qf_names[i]);
|
|
|
|
fscrypt_free_dummy_policy(&ctx->dummy_enc_policy);
|
|
kfree(ctx);
|
|
}
|
|
|
|
int ext4_init_fs_context(struct fs_context *fc)
|
|
{
|
|
struct ext4_fs_context *ctx;
|
|
|
|
ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
fc->fs_private = ctx;
|
|
fc->ops = &ext4_context_ops;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
/*
|
|
* Note the name of the specified quota file.
|
|
*/
|
|
static int note_qf_name(struct fs_context *fc, int qtype,
|
|
struct fs_parameter *param)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
char *qname;
|
|
|
|
if (param->size < 1) {
|
|
ext4_msg(NULL, KERN_ERR, "Missing quota name");
|
|
return -EINVAL;
|
|
}
|
|
if (strchr(param->string, '/')) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"quotafile must be on filesystem root");
|
|
return -EINVAL;
|
|
}
|
|
if (ctx->s_qf_names[qtype]) {
|
|
if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"%s quota file already specified",
|
|
QTYPE2NAME(qtype));
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
qname = kmemdup_nul(param->string, param->size, GFP_KERNEL);
|
|
if (!qname) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Not enough memory for storing quotafile name");
|
|
return -ENOMEM;
|
|
}
|
|
ctx->s_qf_names[qtype] = qname;
|
|
ctx->qname_spec |= 1 << qtype;
|
|
ctx->spec |= EXT4_SPEC_JQUOTA;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Clear the name of the specified quota file.
|
|
*/
|
|
static int unnote_qf_name(struct fs_context *fc, int qtype)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
|
|
kfree(ctx->s_qf_names[qtype]);
|
|
|
|
ctx->s_qf_names[qtype] = NULL;
|
|
ctx->qname_spec |= 1 << qtype;
|
|
ctx->spec |= EXT4_SPEC_JQUOTA;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param,
|
|
struct ext4_fs_context *ctx)
|
|
{
|
|
int err;
|
|
|
|
if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"test_dummy_encryption option not supported");
|
|
return -EINVAL;
|
|
}
|
|
err = fscrypt_parse_test_dummy_encryption(param,
|
|
&ctx->dummy_enc_policy);
|
|
if (err == -EINVAL) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Value of option \"%s\" is unrecognized", param->key);
|
|
} else if (err == -EEXIST) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Conflicting test_dummy_encryption options");
|
|
return -EINVAL;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
#define EXT4_SET_CTX(name) \
|
|
static inline void ctx_set_##name(struct ext4_fs_context *ctx, \
|
|
unsigned long flag) \
|
|
{ \
|
|
ctx->mask_s_##name |= flag; \
|
|
ctx->vals_s_##name |= flag; \
|
|
}
|
|
|
|
#define EXT4_CLEAR_CTX(name) \
|
|
static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \
|
|
unsigned long flag) \
|
|
{ \
|
|
ctx->mask_s_##name |= flag; \
|
|
ctx->vals_s_##name &= ~flag; \
|
|
}
|
|
|
|
#define EXT4_TEST_CTX(name) \
|
|
static inline unsigned long \
|
|
ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \
|
|
{ \
|
|
return (ctx->vals_s_##name & flag); \
|
|
}
|
|
|
|
EXT4_SET_CTX(flags); /* set only */
|
|
EXT4_SET_CTX(mount_opt);
|
|
EXT4_CLEAR_CTX(mount_opt);
|
|
EXT4_TEST_CTX(mount_opt);
|
|
EXT4_SET_CTX(mount_opt2);
|
|
EXT4_CLEAR_CTX(mount_opt2);
|
|
EXT4_TEST_CTX(mount_opt2);
|
|
|
|
static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct fs_parse_result result;
|
|
const struct mount_opts *m;
|
|
int is_remount;
|
|
int token;
|
|
|
|
token = fs_parse(fc, ext4_param_specs, param, &result);
|
|
if (token < 0)
|
|
return token;
|
|
is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;
|
|
|
|
for (m = ext4_mount_opts; m->token != Opt_err; m++)
|
|
if (token == m->token)
|
|
break;
|
|
|
|
ctx->opt_flags |= m->flags;
|
|
|
|
if (m->flags & MOPT_EXPLICIT) {
|
|
if (m->mount_opt & EXT4_MOUNT_DELALLOC) {
|
|
ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC);
|
|
} else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) {
|
|
ctx_set_mount_opt2(ctx,
|
|
EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM);
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (m->flags & MOPT_NOSUPPORT) {
|
|
ext4_msg(NULL, KERN_ERR, "%s option not supported",
|
|
param->key);
|
|
return 0;
|
|
}
|
|
|
|
switch (token) {
|
|
#ifdef CONFIG_QUOTA
|
|
case Opt_usrjquota:
|
|
if (!*param->string)
|
|
return unnote_qf_name(fc, USRQUOTA);
|
|
else
|
|
return note_qf_name(fc, USRQUOTA, param);
|
|
case Opt_grpjquota:
|
|
if (!*param->string)
|
|
return unnote_qf_name(fc, GRPQUOTA);
|
|
else
|
|
return note_qf_name(fc, GRPQUOTA, param);
|
|
#endif
|
|
case Opt_sb:
|
|
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Ignoring %s option on remount", param->key);
|
|
} else {
|
|
ctx->s_sb_block = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_sb_block;
|
|
}
|
|
return 0;
|
|
case Opt_removed:
|
|
ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option",
|
|
param->key);
|
|
return 0;
|
|
case Opt_inlinecrypt:
|
|
#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
|
|
ctx_set_flags(ctx, SB_INLINECRYPT);
|
|
#else
|
|
ext4_msg(NULL, KERN_ERR, "inline encryption not supported");
|
|
#endif
|
|
return 0;
|
|
case Opt_errors:
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK);
|
|
ctx_set_mount_opt(ctx, result.uint_32);
|
|
return 0;
|
|
#ifdef CONFIG_QUOTA
|
|
case Opt_jqfmt:
|
|
ctx->s_jquota_fmt = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_JQFMT;
|
|
return 0;
|
|
#endif
|
|
case Opt_data:
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS);
|
|
ctx_set_mount_opt(ctx, result.uint_32);
|
|
ctx->spec |= EXT4_SPEC_DATAJ;
|
|
return 0;
|
|
case Opt_commit:
|
|
if (result.uint_32 == 0)
|
|
result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE;
|
|
else if (result.uint_32 > INT_MAX / HZ) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Invalid commit interval %d, "
|
|
"must be smaller than %d",
|
|
result.uint_32, INT_MAX / HZ);
|
|
return -EINVAL;
|
|
}
|
|
ctx->s_commit_interval = HZ * result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_commit_interval;
|
|
return 0;
|
|
case Opt_debug_want_extra_isize:
|
|
if ((result.uint_32 & 1) || (result.uint_32 < 4)) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Invalid want_extra_isize %d", result.uint_32);
|
|
return -EINVAL;
|
|
}
|
|
ctx->s_want_extra_isize = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_want_extra_isize;
|
|
return 0;
|
|
case Opt_max_batch_time:
|
|
ctx->s_max_batch_time = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_max_batch_time;
|
|
return 0;
|
|
case Opt_min_batch_time:
|
|
ctx->s_min_batch_time = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_min_batch_time;
|
|
return 0;
|
|
case Opt_inode_readahead_blks:
|
|
if (result.uint_32 &&
|
|
(result.uint_32 > (1 << 30) ||
|
|
!is_power_of_2(result.uint_32))) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"EXT4-fs: inode_readahead_blks must be "
|
|
"0 or a power of 2 smaller than 2^31");
|
|
return -EINVAL;
|
|
}
|
|
ctx->s_inode_readahead_blks = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_inode_readahead_blks;
|
|
return 0;
|
|
case Opt_init_itable:
|
|
ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE);
|
|
ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;
|
|
if (param->type == fs_value_is_string)
|
|
ctx->s_li_wait_mult = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_li_wait_mult;
|
|
return 0;
|
|
case Opt_max_dir_size_kb:
|
|
ctx->s_max_dir_size_kb = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_max_dir_size_kb;
|
|
return 0;
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
case Opt_fc_debug_max_replay:
|
|
ctx->s_fc_debug_max_replay = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay;
|
|
return 0;
|
|
#endif
|
|
case Opt_stripe:
|
|
ctx->s_stripe = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_s_stripe;
|
|
return 0;
|
|
case Opt_resuid:
|
|
ctx->s_resuid = result.uid;
|
|
ctx->spec |= EXT4_SPEC_s_resuid;
|
|
return 0;
|
|
case Opt_resgid:
|
|
ctx->s_resgid = result.gid;
|
|
ctx->spec |= EXT4_SPEC_s_resgid;
|
|
return 0;
|
|
case Opt_journal_dev:
|
|
if (is_remount) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Cannot specify journal on remount");
|
|
return -EINVAL;
|
|
}
|
|
ctx->journal_devnum = result.uint_32;
|
|
ctx->spec |= EXT4_SPEC_JOURNAL_DEV;
|
|
return 0;
|
|
case Opt_journal_path:
|
|
{
|
|
struct inode *journal_inode;
|
|
struct path path;
|
|
int error;
|
|
|
|
if (is_remount) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Cannot specify journal on remount");
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path);
|
|
if (error) {
|
|
ext4_msg(NULL, KERN_ERR, "error: could not find "
|
|
"journal device path");
|
|
return -EINVAL;
|
|
}
|
|
|
|
journal_inode = d_inode(path.dentry);
|
|
ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev);
|
|
ctx->spec |= EXT4_SPEC_JOURNAL_DEV;
|
|
path_put(&path);
|
|
return 0;
|
|
}
|
|
case Opt_journal_ioprio:
|
|
if (result.uint_32 > 7) {
|
|
ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority"
|
|
" (must be 0-7)");
|
|
return -EINVAL;
|
|
}
|
|
ctx->journal_ioprio =
|
|
IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32);
|
|
ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO;
|
|
return 0;
|
|
case Opt_test_dummy_encryption:
|
|
return ext4_parse_test_dummy_encryption(param, ctx);
|
|
case Opt_dax:
|
|
case Opt_dax_type:
|
|
#ifdef CONFIG_FS_DAX
|
|
{
|
|
int type = (token == Opt_dax) ?
|
|
Opt_dax : result.uint_32;
|
|
|
|
switch (type) {
|
|
case Opt_dax:
|
|
case Opt_dax_always:
|
|
ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
|
|
ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
|
|
break;
|
|
case Opt_dax_never:
|
|
ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
|
|
break;
|
|
case Opt_dax_inode:
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS);
|
|
ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER);
|
|
/* Strictly for printing options */
|
|
ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
ext4_msg(NULL, KERN_INFO, "dax option not supported");
|
|
return -EINVAL;
|
|
#endif
|
|
case Opt_data_err:
|
|
if (result.uint_32 == Opt_data_err_abort)
|
|
ctx_set_mount_opt(ctx, m->mount_opt);
|
|
else if (result.uint_32 == Opt_data_err_ignore)
|
|
ctx_clear_mount_opt(ctx, m->mount_opt);
|
|
return 0;
|
|
case Opt_mb_optimize_scan:
|
|
if (result.int_32 == 1) {
|
|
ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN);
|
|
ctx->spec |= EXT4_SPEC_mb_optimize_scan;
|
|
} else if (result.int_32 == 0) {
|
|
ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN);
|
|
ctx->spec |= EXT4_SPEC_mb_optimize_scan;
|
|
} else {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"mb_optimize_scan should be set to 0 or 1.");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* At this point we should only be getting options requiring MOPT_SET,
|
|
* or MOPT_CLEAR. Anything else is a bug
|
|
*/
|
|
if (m->token == Opt_err) {
|
|
ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s",
|
|
param->key);
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
else {
|
|
unsigned int set = 0;
|
|
|
|
if ((param->type == fs_value_is_flag) ||
|
|
result.uint_32 > 0)
|
|
set = 1;
|
|
|
|
if (m->flags & MOPT_CLEAR)
|
|
set = !set;
|
|
else if (unlikely(!(m->flags & MOPT_SET))) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"buggy handling of option %s",
|
|
param->key);
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
if (m->flags & MOPT_2) {
|
|
if (set != 0)
|
|
ctx_set_mount_opt2(ctx, m->mount_opt);
|
|
else
|
|
ctx_clear_mount_opt2(ctx, m->mount_opt);
|
|
} else {
|
|
if (set != 0)
|
|
ctx_set_mount_opt(ctx, m->mount_opt);
|
|
else
|
|
ctx_clear_mount_opt(ctx, m->mount_opt);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_options(struct fs_context *fc, char *options)
|
|
{
|
|
struct fs_parameter param;
|
|
int ret;
|
|
char *key;
|
|
|
|
if (!options)
|
|
return 0;
|
|
|
|
while ((key = strsep(&options, ",")) != NULL) {
|
|
if (*key) {
|
|
size_t v_len = 0;
|
|
char *value = strchr(key, '=');
|
|
|
|
param.type = fs_value_is_flag;
|
|
param.string = NULL;
|
|
|
|
if (value) {
|
|
if (value == key)
|
|
continue;
|
|
|
|
*value++ = 0;
|
|
v_len = strlen(value);
|
|
param.string = kmemdup_nul(value, v_len,
|
|
GFP_KERNEL);
|
|
if (!param.string)
|
|
return -ENOMEM;
|
|
param.type = fs_value_is_string;
|
|
}
|
|
|
|
param.key = key;
|
|
param.size = v_len;
|
|
|
|
ret = ext4_parse_param(fc, ¶m);
|
|
kfree(param.string);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = ext4_validate_options(fc);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_apply_sb_mount_options(struct super_block *sb,
|
|
struct ext4_fs_context *m_ctx)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
char *s_mount_opts = NULL;
|
|
struct ext4_fs_context *s_ctx = NULL;
|
|
struct fs_context *fc = NULL;
|
|
int ret = -ENOMEM;
|
|
|
|
if (!sbi->s_es->s_mount_opts[0])
|
|
return 0;
|
|
|
|
s_mount_opts = kstrndup(sbi->s_es->s_mount_opts,
|
|
sizeof(sbi->s_es->s_mount_opts),
|
|
GFP_KERNEL);
|
|
if (!s_mount_opts)
|
|
return ret;
|
|
|
|
fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL);
|
|
if (!fc)
|
|
goto out_free;
|
|
|
|
s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL);
|
|
if (!s_ctx)
|
|
goto out_free;
|
|
|
|
fc->fs_private = s_ctx;
|
|
fc->s_fs_info = sbi;
|
|
|
|
ret = parse_options(fc, s_mount_opts);
|
|
if (ret < 0)
|
|
goto parse_failed;
|
|
|
|
ret = ext4_check_opt_consistency(fc, sb);
|
|
if (ret < 0) {
|
|
parse_failed:
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"failed to parse options in superblock: %s",
|
|
s_mount_opts);
|
|
ret = 0;
|
|
goto out_free;
|
|
}
|
|
|
|
if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV)
|
|
m_ctx->journal_devnum = s_ctx->journal_devnum;
|
|
if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)
|
|
m_ctx->journal_ioprio = s_ctx->journal_ioprio;
|
|
|
|
ext4_apply_options(fc, sb);
|
|
ret = 0;
|
|
|
|
out_free:
|
|
if (fc) {
|
|
ext4_fc_free(fc);
|
|
kfree(fc);
|
|
}
|
|
kfree(s_mount_opts);
|
|
return ret;
|
|
}
|
|
|
|
static void ext4_apply_quota_options(struct fs_context *fc,
|
|
struct super_block *sb)
|
|
{
|
|
#ifdef CONFIG_QUOTA
|
|
bool quota_feature = ext4_has_feature_quota(sb);
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
char *qname;
|
|
int i;
|
|
|
|
if (quota_feature)
|
|
return;
|
|
|
|
if (ctx->spec & EXT4_SPEC_JQUOTA) {
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
|
|
if (!(ctx->qname_spec & (1 << i)))
|
|
continue;
|
|
|
|
qname = ctx->s_qf_names[i]; /* May be NULL */
|
|
if (qname)
|
|
set_opt(sb, QUOTA);
|
|
ctx->s_qf_names[i] = NULL;
|
|
qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,
|
|
lockdep_is_held(&sb->s_umount));
|
|
if (qname)
|
|
kfree_rcu_mightsleep(qname);
|
|
}
|
|
}
|
|
|
|
if (ctx->spec & EXT4_SPEC_JQFMT)
|
|
sbi->s_jquota_fmt = ctx->s_jquota_fmt;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Check quota settings consistency.
|
|
*/
|
|
static int ext4_check_quota_consistency(struct fs_context *fc,
|
|
struct super_block *sb)
|
|
{
|
|
#ifdef CONFIG_QUOTA
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
bool quota_feature = ext4_has_feature_quota(sb);
|
|
bool quota_loaded = sb_any_quota_loaded(sb);
|
|
bool usr_qf_name, grp_qf_name, usrquota, grpquota;
|
|
int quota_flags, i;
|
|
|
|
/*
|
|
* We do the test below only for project quotas. 'usrquota' and
|
|
* 'grpquota' mount options are allowed even without quota feature
|
|
* to support legacy quotas in quota files.
|
|
*/
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) &&
|
|
!ext4_has_feature_project(sb)) {
|
|
ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. "
|
|
"Cannot enable project quota enforcement.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
|
|
EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA;
|
|
if (quota_loaded &&
|
|
ctx->mask_s_mount_opt & quota_flags &&
|
|
!ctx_test_mount_opt(ctx, quota_flags))
|
|
goto err_quota_change;
|
|
|
|
if (ctx->spec & EXT4_SPEC_JQUOTA) {
|
|
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
|
|
if (!(ctx->qname_spec & (1 << i)))
|
|
continue;
|
|
|
|
if (quota_loaded &&
|
|
!!sbi->s_qf_names[i] != !!ctx->s_qf_names[i])
|
|
goto err_jquota_change;
|
|
|
|
if (sbi->s_qf_names[i] && ctx->s_qf_names[i] &&
|
|
strcmp(get_qf_name(sb, sbi, i),
|
|
ctx->s_qf_names[i]) != 0)
|
|
goto err_jquota_specified;
|
|
}
|
|
|
|
if (quota_feature) {
|
|
ext4_msg(NULL, KERN_INFO,
|
|
"Journaled quota options ignored when "
|
|
"QUOTA feature is enabled");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (ctx->spec & EXT4_SPEC_JQFMT) {
|
|
if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded)
|
|
goto err_jquota_change;
|
|
if (quota_feature) {
|
|
ext4_msg(NULL, KERN_INFO, "Quota format mount options "
|
|
"ignored when QUOTA feature is enabled");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Make sure we don't mix old and new quota format */
|
|
usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) ||
|
|
ctx->s_qf_names[USRQUOTA]);
|
|
grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) ||
|
|
ctx->s_qf_names[GRPQUOTA]);
|
|
|
|
usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) ||
|
|
test_opt(sb, USRQUOTA));
|
|
|
|
grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) ||
|
|
test_opt(sb, GRPQUOTA));
|
|
|
|
if (usr_qf_name) {
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA);
|
|
usrquota = false;
|
|
}
|
|
if (grp_qf_name) {
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA);
|
|
grpquota = false;
|
|
}
|
|
|
|
if (usr_qf_name || grp_qf_name) {
|
|
if (usrquota || grpquota) {
|
|
ext4_msg(NULL, KERN_ERR, "old and new quota "
|
|
"format mixing");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) {
|
|
ext4_msg(NULL, KERN_ERR, "journaled quota format "
|
|
"not specified");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_quota_change:
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Cannot change quota options when quota turned on");
|
|
return -EINVAL;
|
|
err_jquota_change:
|
|
ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota "
|
|
"options when quota turned on");
|
|
return -EINVAL;
|
|
err_jquota_specified:
|
|
ext4_msg(NULL, KERN_ERR, "%s quota file already specified",
|
|
QTYPE2NAME(i));
|
|
return -EINVAL;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static int ext4_check_test_dummy_encryption(const struct fs_context *fc,
|
|
struct super_block *sb)
|
|
{
|
|
const struct ext4_fs_context *ctx = fc->fs_private;
|
|
const struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy))
|
|
return 0;
|
|
|
|
if (!ext4_has_feature_encrypt(sb)) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"test_dummy_encryption requires encrypt feature");
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* This mount option is just for testing, and it's not worthwhile to
|
|
* implement the extra complexity (e.g. RCU protection) that would be
|
|
* needed to allow it to be set or changed during remount. We do allow
|
|
* it to be specified during remount, but only if there is no change.
|
|
*/
|
|
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
|
|
if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,
|
|
&ctx->dummy_enc_policy))
|
|
return 0;
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Can't set or change test_dummy_encryption on remount");
|
|
return -EINVAL;
|
|
}
|
|
/* Also make sure s_mount_opts didn't contain a conflicting value. */
|
|
if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) {
|
|
if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy,
|
|
&ctx->dummy_enc_policy))
|
|
return 0;
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Conflicting test_dummy_encryption options");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx,
|
|
struct super_block *sb)
|
|
{
|
|
if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) ||
|
|
/* if already set, it was already verified to be the same */
|
|
fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy))
|
|
return;
|
|
EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy;
|
|
memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy));
|
|
ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled");
|
|
}
|
|
|
|
static int ext4_check_opt_consistency(struct fs_context *fc,
|
|
struct super_block *sb)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_sb_info *sbi = fc->s_fs_info;
|
|
int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;
|
|
int err;
|
|
|
|
if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Mount option(s) incompatible with ext2");
|
|
return -EINVAL;
|
|
}
|
|
if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Mount option(s) incompatible with ext3");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ctx->s_want_extra_isize >
|
|
(sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) {
|
|
ext4_msg(NULL, KERN_ERR,
|
|
"Invalid want_extra_isize %d",
|
|
ctx->s_want_extra_isize);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = ext4_check_test_dummy_encryption(fc, sb);
|
|
if (err)
|
|
return err;
|
|
|
|
if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) {
|
|
if (!sbi->s_journal) {
|
|
ext4_msg(NULL, KERN_WARNING,
|
|
"Remounting file system with no journal "
|
|
"so ignoring journalled data option");
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS);
|
|
} else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) !=
|
|
test_opt(sb, DATA_FLAGS)) {
|
|
ext4_msg(NULL, KERN_ERR, "Cannot change data mode "
|
|
"on remount");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (is_remount) {
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) &&
|
|
(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) {
|
|
ext4_msg(NULL, KERN_ERR, "can't mount with "
|
|
"both data=journal and dax");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) &&
|
|
(!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
|
|
(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) {
|
|
fail_dax_change_remount:
|
|
ext4_msg(NULL, KERN_ERR, "can't change "
|
|
"dax mount option while remounting");
|
|
return -EINVAL;
|
|
} else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) &&
|
|
(!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
|
|
(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) {
|
|
goto fail_dax_change_remount;
|
|
} else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) &&
|
|
((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) ||
|
|
(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) ||
|
|
!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) {
|
|
goto fail_dax_change_remount;
|
|
}
|
|
}
|
|
|
|
return ext4_check_quota_consistency(fc, sb);
|
|
}
|
|
|
|
static void ext4_apply_options(struct fs_context *fc, struct super_block *sb)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_sb_info *sbi = fc->s_fs_info;
|
|
|
|
sbi->s_mount_opt &= ~ctx->mask_s_mount_opt;
|
|
sbi->s_mount_opt |= ctx->vals_s_mount_opt;
|
|
sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2;
|
|
sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2;
|
|
sb->s_flags &= ~ctx->mask_s_flags;
|
|
sb->s_flags |= ctx->vals_s_flags;
|
|
|
|
#define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; })
|
|
APPLY(s_commit_interval);
|
|
APPLY(s_stripe);
|
|
APPLY(s_max_batch_time);
|
|
APPLY(s_min_batch_time);
|
|
APPLY(s_want_extra_isize);
|
|
APPLY(s_inode_readahead_blks);
|
|
APPLY(s_max_dir_size_kb);
|
|
APPLY(s_li_wait_mult);
|
|
APPLY(s_resgid);
|
|
APPLY(s_resuid);
|
|
|
|
#ifdef CONFIG_EXT4_DEBUG
|
|
APPLY(s_fc_debug_max_replay);
|
|
#endif
|
|
|
|
ext4_apply_quota_options(fc, sb);
|
|
ext4_apply_test_dummy_encryption(ctx, sb);
|
|
}
|
|
|
|
|
|
static int ext4_validate_options(struct fs_context *fc)
|
|
{
|
|
#ifdef CONFIG_QUOTA
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
char *usr_qf_name, *grp_qf_name;
|
|
|
|
usr_qf_name = ctx->s_qf_names[USRQUOTA];
|
|
grp_qf_name = ctx->s_qf_names[GRPQUOTA];
|
|
|
|
if (usr_qf_name || grp_qf_name) {
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name)
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA);
|
|
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name)
|
|
ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA);
|
|
|
|
if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) ||
|
|
ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) {
|
|
ext4_msg(NULL, KERN_ERR, "old and new quota "
|
|
"format mixing");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
static inline void ext4_show_quota_options(struct seq_file *seq,
|
|
struct super_block *sb)
|
|
{
|
|
#if defined(CONFIG_QUOTA)
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
char *usr_qf_name, *grp_qf_name;
|
|
|
|
if (sbi->s_jquota_fmt) {
|
|
char *fmtname = "";
|
|
|
|
switch (sbi->s_jquota_fmt) {
|
|
case QFMT_VFS_OLD:
|
|
fmtname = "vfsold";
|
|
break;
|
|
case QFMT_VFS_V0:
|
|
fmtname = "vfsv0";
|
|
break;
|
|
case QFMT_VFS_V1:
|
|
fmtname = "vfsv1";
|
|
break;
|
|
}
|
|
seq_printf(seq, ",jqfmt=%s", fmtname);
|
|
}
|
|
|
|
rcu_read_lock();
|
|
usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]);
|
|
grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]);
|
|
if (usr_qf_name)
|
|
seq_show_option(seq, "usrjquota", usr_qf_name);
|
|
if (grp_qf_name)
|
|
seq_show_option(seq, "grpjquota", grp_qf_name);
|
|
rcu_read_unlock();
|
|
#endif
|
|
}
|
|
|
|
static const char *token2str(int token)
|
|
{
|
|
const struct fs_parameter_spec *spec;
|
|
|
|
for (spec = ext4_param_specs; spec->name != NULL; spec++)
|
|
if (spec->opt == token && !spec->type)
|
|
break;
|
|
return spec->name;
|
|
}
|
|
|
|
/*
|
|
* Show an option if
|
|
* - it's set to a non-default value OR
|
|
* - if the per-sb default is different from the global default
|
|
*/
|
|
static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
|
|
int nodefs)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
int def_errors;
|
|
const struct mount_opts *m;
|
|
char sep = nodefs ? '\n' : ',';
|
|
|
|
#define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep)
|
|
#define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg)
|
|
|
|
if (sbi->s_sb_block != 1)
|
|
SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block);
|
|
|
|
for (m = ext4_mount_opts; m->token != Opt_err; m++) {
|
|
int want_set = m->flags & MOPT_SET;
|
|
int opt_2 = m->flags & MOPT_2;
|
|
unsigned int mount_opt, def_mount_opt;
|
|
|
|
if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||
|
|
m->flags & MOPT_SKIP)
|
|
continue;
|
|
|
|
if (opt_2) {
|
|
mount_opt = sbi->s_mount_opt2;
|
|
def_mount_opt = sbi->s_def_mount_opt2;
|
|
} else {
|
|
mount_opt = sbi->s_mount_opt;
|
|
def_mount_opt = sbi->s_def_mount_opt;
|
|
}
|
|
/* skip if same as the default */
|
|
if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt)))
|
|
continue;
|
|
/* select Opt_noFoo vs Opt_Foo */
|
|
if ((want_set &&
|
|
(mount_opt & m->mount_opt) != m->mount_opt) ||
|
|
(!want_set && (mount_opt & m->mount_opt)))
|
|
continue;
|
|
SEQ_OPTS_PRINT("%s", token2str(m->token));
|
|
}
|
|
|
|
if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) ||
|
|
le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID)
|
|
SEQ_OPTS_PRINT("resuid=%u",
|
|
from_kuid_munged(&init_user_ns, sbi->s_resuid));
|
|
if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) ||
|
|
le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID)
|
|
SEQ_OPTS_PRINT("resgid=%u",
|
|
from_kgid_munged(&init_user_ns, sbi->s_resgid));
|
|
def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors);
|
|
if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO)
|
|
SEQ_OPTS_PUTS("errors=remount-ro");
|
|
if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE)
|
|
SEQ_OPTS_PUTS("errors=continue");
|
|
if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC)
|
|
SEQ_OPTS_PUTS("errors=panic");
|
|
if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ)
|
|
SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ);
|
|
if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME)
|
|
SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time);
|
|
if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME)
|
|
SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time);
|
|
if (nodefs || sbi->s_stripe)
|
|
SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe);
|
|
if (nodefs || EXT4_MOUNT_DATA_FLAGS &
|
|
(sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {
|
|
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
|
|
SEQ_OPTS_PUTS("data=journal");
|
|
else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
|
|
SEQ_OPTS_PUTS("data=ordered");
|
|
else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
|
|
SEQ_OPTS_PUTS("data=writeback");
|
|
}
|
|
if (nodefs ||
|
|
sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS)
|
|
SEQ_OPTS_PRINT("inode_readahead_blks=%u",
|
|
sbi->s_inode_readahead_blks);
|
|
|
|
if (test_opt(sb, INIT_INODE_TABLE) && (nodefs ||
|
|
(sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))
|
|
SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);
|
|
if (nodefs || sbi->s_max_dir_size_kb)
|
|
SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);
|
|
if (test_opt(sb, DATA_ERR_ABORT))
|
|
SEQ_OPTS_PUTS("data_err=abort");
|
|
|
|
fscrypt_show_test_dummy_encryption(seq, sep, sb);
|
|
|
|
if (sb->s_flags & SB_INLINECRYPT)
|
|
SEQ_OPTS_PUTS("inlinecrypt");
|
|
|
|
if (test_opt(sb, DAX_ALWAYS)) {
|
|
if (IS_EXT2_SB(sb))
|
|
SEQ_OPTS_PUTS("dax");
|
|
else
|
|
SEQ_OPTS_PUTS("dax=always");
|
|
} else if (test_opt2(sb, DAX_NEVER)) {
|
|
SEQ_OPTS_PUTS("dax=never");
|
|
} else if (test_opt2(sb, DAX_INODE)) {
|
|
SEQ_OPTS_PUTS("dax=inode");
|
|
}
|
|
|
|
if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
|
|
!test_opt2(sb, MB_OPTIMIZE_SCAN)) {
|
|
SEQ_OPTS_PUTS("mb_optimize_scan=0");
|
|
} else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD &&
|
|
test_opt2(sb, MB_OPTIMIZE_SCAN)) {
|
|
SEQ_OPTS_PUTS("mb_optimize_scan=1");
|
|
}
|
|
|
|
ext4_show_quota_options(seq, sb);
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_show_options(struct seq_file *seq, struct dentry *root)
|
|
{
|
|
return _ext4_show_options(seq, root->d_sb, 0);
|
|
}
|
|
|
|
int ext4_seq_options_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct super_block *sb = seq->private;
|
|
int rc;
|
|
|
|
seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw");
|
|
rc = _ext4_show_options(seq, sb, 1);
|
|
seq_puts(seq, "\n");
|
|
return rc;
|
|
}
|
|
|
|
static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
|
|
int read_only)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
int err = 0;
|
|
|
|
if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) {
|
|
ext4_msg(sb, KERN_ERR, "revision level too high, "
|
|
"forcing read-only mode");
|
|
err = -EROFS;
|
|
goto done;
|
|
}
|
|
if (read_only)
|
|
goto done;
|
|
if (!(sbi->s_mount_state & EXT4_VALID_FS))
|
|
ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, "
|
|
"running e2fsck is recommended");
|
|
else if (sbi->s_mount_state & EXT4_ERROR_FS)
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"warning: mounting fs with errors, "
|
|
"running e2fsck is recommended");
|
|
else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&
|
|
le16_to_cpu(es->s_mnt_count) >=
|
|
(unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"warning: maximal mount count reached, "
|
|
"running e2fsck is recommended");
|
|
else if (le32_to_cpu(es->s_checkinterval) &&
|
|
(ext4_get_tstamp(es, s_lastcheck) +
|
|
le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds()))
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"warning: checktime reached, "
|
|
"running e2fsck is recommended");
|
|
if (!sbi->s_journal)
|
|
es->s_state &= cpu_to_le16(~EXT4_VALID_FS);
|
|
if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
|
|
es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);
|
|
le16_add_cpu(&es->s_mnt_count, 1);
|
|
ext4_update_tstamp(es, s_mtime);
|
|
if (sbi->s_journal) {
|
|
ext4_set_feature_journal_needs_recovery(sb);
|
|
if (ext4_has_feature_orphan_file(sb))
|
|
ext4_set_feature_orphan_present(sb);
|
|
}
|
|
|
|
err = ext4_commit_super(sb);
|
|
done:
|
|
if (test_opt(sb, DEBUG))
|
|
printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, "
|
|
"bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n",
|
|
sb->s_blocksize,
|
|
sbi->s_groups_count,
|
|
EXT4_BLOCKS_PER_GROUP(sb),
|
|
EXT4_INODES_PER_GROUP(sb),
|
|
sbi->s_mount_opt, sbi->s_mount_opt2);
|
|
return err;
|
|
}
|
|
|
|
int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct flex_groups **old_groups, **new_groups;
|
|
int size, i, j;
|
|
|
|
if (!sbi->s_log_groups_per_flex)
|
|
return 0;
|
|
|
|
size = ext4_flex_group(sbi, ngroup - 1) + 1;
|
|
if (size <= sbi->s_flex_groups_allocated)
|
|
return 0;
|
|
|
|
new_groups = kvzalloc(roundup_pow_of_two(size *
|
|
sizeof(*sbi->s_flex_groups)), GFP_KERNEL);
|
|
if (!new_groups) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"not enough memory for %d flex group pointers", size);
|
|
return -ENOMEM;
|
|
}
|
|
for (i = sbi->s_flex_groups_allocated; i < size; i++) {
|
|
new_groups[i] = kvzalloc(roundup_pow_of_two(
|
|
sizeof(struct flex_groups)),
|
|
GFP_KERNEL);
|
|
if (!new_groups[i]) {
|
|
for (j = sbi->s_flex_groups_allocated; j < i; j++)
|
|
kvfree(new_groups[j]);
|
|
kvfree(new_groups);
|
|
ext4_msg(sb, KERN_ERR,
|
|
"not enough memory for %d flex groups", size);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
rcu_read_lock();
|
|
old_groups = rcu_dereference(sbi->s_flex_groups);
|
|
if (old_groups)
|
|
memcpy(new_groups, old_groups,
|
|
(sbi->s_flex_groups_allocated *
|
|
sizeof(struct flex_groups *)));
|
|
rcu_read_unlock();
|
|
rcu_assign_pointer(sbi->s_flex_groups, new_groups);
|
|
sbi->s_flex_groups_allocated = size;
|
|
if (old_groups)
|
|
ext4_kvfree_array_rcu(old_groups);
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_fill_flex_info(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_group_desc *gdp = NULL;
|
|
struct flex_groups *fg;
|
|
ext4_group_t flex_group;
|
|
int i, err;
|
|
|
|
sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
|
|
if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) {
|
|
sbi->s_log_groups_per_flex = 0;
|
|
return 1;
|
|
}
|
|
|
|
err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);
|
|
if (err)
|
|
goto failed;
|
|
|
|
for (i = 0; i < sbi->s_groups_count; i++) {
|
|
gdp = ext4_get_group_desc(sb, i, NULL);
|
|
|
|
flex_group = ext4_flex_group(sbi, i);
|
|
fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group);
|
|
atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);
|
|
atomic64_add(ext4_free_group_clusters(sb, gdp),
|
|
&fg->free_clusters);
|
|
atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);
|
|
}
|
|
|
|
return 1;
|
|
failed:
|
|
return 0;
|
|
}
|
|
|
|
static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group,
|
|
struct ext4_group_desc *gdp)
|
|
{
|
|
int offset = offsetof(struct ext4_group_desc, bg_checksum);
|
|
__u16 crc = 0;
|
|
__le32 le_group = cpu_to_le32(block_group);
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (ext4_has_metadata_csum(sbi->s_sb)) {
|
|
/* Use new metadata_csum algorithm */
|
|
__u32 csum32;
|
|
__u16 dummy_csum = 0;
|
|
|
|
csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group,
|
|
sizeof(le_group));
|
|
csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset);
|
|
csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum,
|
|
sizeof(dummy_csum));
|
|
offset += sizeof(dummy_csum);
|
|
if (offset < sbi->s_desc_size)
|
|
csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset,
|
|
sbi->s_desc_size - offset);
|
|
|
|
crc = csum32 & 0xFFFF;
|
|
goto out;
|
|
}
|
|
|
|
/* old crc16 code */
|
|
if (!ext4_has_feature_gdt_csum(sb))
|
|
return 0;
|
|
|
|
crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));
|
|
crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group));
|
|
crc = crc16(crc, (__u8 *)gdp, offset);
|
|
offset += sizeof(gdp->bg_checksum); /* skip checksum */
|
|
/* for checksum of struct ext4_group_desc do the rest...*/
|
|
if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size)
|
|
crc = crc16(crc, (__u8 *)gdp + offset,
|
|
sbi->s_desc_size - offset);
|
|
|
|
out:
|
|
return cpu_to_le16(crc);
|
|
}
|
|
|
|
int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group,
|
|
struct ext4_group_desc *gdp)
|
|
{
|
|
if (ext4_has_group_desc_csum(sb) &&
|
|
(gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp)))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group,
|
|
struct ext4_group_desc *gdp)
|
|
{
|
|
if (!ext4_has_group_desc_csum(sb))
|
|
return;
|
|
gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp);
|
|
}
|
|
|
|
/* Called at mount-time, super-block is locked */
|
|
static int ext4_check_descriptors(struct super_block *sb,
|
|
ext4_fsblk_t sb_block,
|
|
ext4_group_t *first_not_zeroed)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block);
|
|
ext4_fsblk_t last_block;
|
|
ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0);
|
|
ext4_fsblk_t block_bitmap;
|
|
ext4_fsblk_t inode_bitmap;
|
|
ext4_fsblk_t inode_table;
|
|
int flexbg_flag = 0;
|
|
ext4_group_t i, grp = sbi->s_groups_count;
|
|
|
|
if (ext4_has_feature_flex_bg(sb))
|
|
flexbg_flag = 1;
|
|
|
|
ext4_debug("Checking group descriptors");
|
|
|
|
for (i = 0; i < sbi->s_groups_count; i++) {
|
|
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL);
|
|
|
|
if (i == sbi->s_groups_count - 1 || flexbg_flag)
|
|
last_block = ext4_blocks_count(sbi->s_es) - 1;
|
|
else
|
|
last_block = first_block +
|
|
(EXT4_BLOCKS_PER_GROUP(sb) - 1);
|
|
|
|
if ((grp == sbi->s_groups_count) &&
|
|
!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))
|
|
grp = i;
|
|
|
|
block_bitmap = ext4_block_bitmap(sb, gdp);
|
|
if (block_bitmap == sb_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Block bitmap for group %u overlaps "
|
|
"superblock", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (block_bitmap >= sb_block + 1 &&
|
|
block_bitmap <= last_bg_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Block bitmap for group %u overlaps "
|
|
"block group descriptors", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (block_bitmap < first_block || block_bitmap > last_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Block bitmap for group %u not in group "
|
|
"(block %llu)!", i, block_bitmap);
|
|
return 0;
|
|
}
|
|
inode_bitmap = ext4_inode_bitmap(sb, gdp);
|
|
if (inode_bitmap == sb_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode bitmap for group %u overlaps "
|
|
"superblock", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (inode_bitmap >= sb_block + 1 &&
|
|
inode_bitmap <= last_bg_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode bitmap for group %u overlaps "
|
|
"block group descriptors", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (inode_bitmap < first_block || inode_bitmap > last_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode bitmap for group %u not in group "
|
|
"(block %llu)!", i, inode_bitmap);
|
|
return 0;
|
|
}
|
|
inode_table = ext4_inode_table(sb, gdp);
|
|
if (inode_table == sb_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode table for group %u overlaps "
|
|
"superblock", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (inode_table >= sb_block + 1 &&
|
|
inode_table <= last_bg_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode table for group %u overlaps "
|
|
"block group descriptors", i);
|
|
if (!sb_rdonly(sb))
|
|
return 0;
|
|
}
|
|
if (inode_table < first_block ||
|
|
inode_table + sbi->s_itb_per_group - 1 > last_block) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Inode table for group %u not in group "
|
|
"(block %llu)!", i, inode_table);
|
|
return 0;
|
|
}
|
|
ext4_lock_group(sb, i);
|
|
if (!ext4_group_desc_csum_verify(sb, i, gdp)) {
|
|
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
|
|
"Checksum for group %u failed (%u!=%u)",
|
|
i, le16_to_cpu(ext4_group_desc_csum(sb, i,
|
|
gdp)), le16_to_cpu(gdp->bg_checksum));
|
|
if (!sb_rdonly(sb)) {
|
|
ext4_unlock_group(sb, i);
|
|
return 0;
|
|
}
|
|
}
|
|
ext4_unlock_group(sb, i);
|
|
if (!flexbg_flag)
|
|
first_block += EXT4_BLOCKS_PER_GROUP(sb);
|
|
}
|
|
if (NULL != first_not_zeroed)
|
|
*first_not_zeroed = grp;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Maximal extent format file size.
|
|
* Resulting logical blkno at s_maxbytes must fit in our on-disk
|
|
* extent format containers, within a sector_t, and within i_blocks
|
|
* in the vfs. ext4 inode has 48 bits of i_block in fsblock units,
|
|
* so that won't be a limiting factor.
|
|
*
|
|
* However there is other limiting factor. We do store extents in the form
|
|
* of starting block and length, hence the resulting length of the extent
|
|
* covering maximum file size must fit into on-disk format containers as
|
|
* well. Given that length is always by 1 unit bigger than max unit (because
|
|
* we count 0 as well) we have to lower the s_maxbytes by one fs block.
|
|
*
|
|
* Note, this does *not* consider any metadata overhead for vfs i_blocks.
|
|
*/
|
|
static loff_t ext4_max_size(int blkbits, int has_huge_files)
|
|
{
|
|
loff_t res;
|
|
loff_t upper_limit = MAX_LFS_FILESIZE;
|
|
|
|
BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64));
|
|
|
|
if (!has_huge_files) {
|
|
upper_limit = (1LL << 32) - 1;
|
|
|
|
/* total blocks in file system block size */
|
|
upper_limit >>= (blkbits - 9);
|
|
upper_limit <<= blkbits;
|
|
}
|
|
|
|
/*
|
|
* 32-bit extent-start container, ee_block. We lower the maxbytes
|
|
* by one fs block, so ee_len can cover the extent of maximum file
|
|
* size
|
|
*/
|
|
res = (1LL << 32) - 1;
|
|
res <<= blkbits;
|
|
|
|
/* Sanity check against vm- & vfs- imposed limits */
|
|
if (res > upper_limit)
|
|
res = upper_limit;
|
|
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect
|
|
* block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks.
|
|
* We need to be 1 filesystem block less than the 2^48 sector limit.
|
|
*/
|
|
static loff_t ext4_max_bitmap_size(int bits, int has_huge_files)
|
|
{
|
|
loff_t upper_limit, res = EXT4_NDIR_BLOCKS;
|
|
int meta_blocks;
|
|
unsigned int ppb = 1 << (bits - 2);
|
|
|
|
/*
|
|
* This is calculated to be the largest file size for a dense, block
|
|
* mapped file such that the file's total number of 512-byte sectors,
|
|
* including data and all indirect blocks, does not exceed (2^48 - 1).
|
|
*
|
|
* __u32 i_blocks_lo and _u16 i_blocks_high represent the total
|
|
* number of 512-byte sectors of the file.
|
|
*/
|
|
if (!has_huge_files) {
|
|
/*
|
|
* !has_huge_files or implies that the inode i_block field
|
|
* represents total file blocks in 2^32 512-byte sectors ==
|
|
* size of vfs inode i_blocks * 8
|
|
*/
|
|
upper_limit = (1LL << 32) - 1;
|
|
|
|
/* total blocks in file system block size */
|
|
upper_limit >>= (bits - 9);
|
|
|
|
} else {
|
|
/*
|
|
* We use 48 bit ext4_inode i_blocks
|
|
* With EXT4_HUGE_FILE_FL set the i_blocks
|
|
* represent total number of blocks in
|
|
* file system block size
|
|
*/
|
|
upper_limit = (1LL << 48) - 1;
|
|
|
|
}
|
|
|
|
/* Compute how many blocks we can address by block tree */
|
|
res += ppb;
|
|
res += ppb * ppb;
|
|
res += ((loff_t)ppb) * ppb * ppb;
|
|
/* Compute how many metadata blocks are needed */
|
|
meta_blocks = 1;
|
|
meta_blocks += 1 + ppb;
|
|
meta_blocks += 1 + ppb + ppb * ppb;
|
|
/* Does block tree limit file size? */
|
|
if (res + meta_blocks <= upper_limit)
|
|
goto check_lfs;
|
|
|
|
res = upper_limit;
|
|
/* How many metadata blocks are needed for addressing upper_limit? */
|
|
upper_limit -= EXT4_NDIR_BLOCKS;
|
|
/* indirect blocks */
|
|
meta_blocks = 1;
|
|
upper_limit -= ppb;
|
|
/* double indirect blocks */
|
|
if (upper_limit < ppb * ppb) {
|
|
meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb);
|
|
res -= meta_blocks;
|
|
goto check_lfs;
|
|
}
|
|
meta_blocks += 1 + ppb;
|
|
upper_limit -= ppb * ppb;
|
|
/* tripple indirect blocks for the rest */
|
|
meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) +
|
|
DIV_ROUND_UP_ULL(upper_limit, ppb*ppb);
|
|
res -= meta_blocks;
|
|
check_lfs:
|
|
res <<= bits;
|
|
if (res > MAX_LFS_FILESIZE)
|
|
res = MAX_LFS_FILESIZE;
|
|
|
|
return res;
|
|
}
|
|
|
|
static ext4_fsblk_t descriptor_loc(struct super_block *sb,
|
|
ext4_fsblk_t logical_sb_block, int nr)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
ext4_group_t bg, first_meta_bg;
|
|
int has_super = 0;
|
|
|
|
first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
|
|
|
|
if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg)
|
|
return logical_sb_block + nr + 1;
|
|
bg = sbi->s_desc_per_block * nr;
|
|
if (ext4_bg_has_super(sb, bg))
|
|
has_super = 1;
|
|
|
|
/*
|
|
* If we have a meta_bg fs with 1k blocks, group 0's GDT is at
|
|
* block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled
|
|
* on modern mke2fs or blksize > 1k on older mke2fs) then we must
|
|
* compensate.
|
|
*/
|
|
if (sb->s_blocksize == 1024 && nr == 0 &&
|
|
le32_to_cpu(sbi->s_es->s_first_data_block) == 0)
|
|
has_super++;
|
|
|
|
return (has_super + ext4_group_first_block_no(sb, bg));
|
|
}
|
|
|
|
/**
|
|
* ext4_get_stripe_size: Get the stripe size.
|
|
* @sbi: In memory super block info
|
|
*
|
|
* If we have specified it via mount option, then
|
|
* use the mount option value. If the value specified at mount time is
|
|
* greater than the blocks per group use the super block value.
|
|
* If the super block value is greater than blocks per group return 0.
|
|
* Allocator needs it be less than blocks per group.
|
|
*
|
|
*/
|
|
static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
|
|
{
|
|
unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride);
|
|
unsigned long stripe_width =
|
|
le32_to_cpu(sbi->s_es->s_raid_stripe_width);
|
|
int ret;
|
|
|
|
if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group)
|
|
ret = sbi->s_stripe;
|
|
else if (stripe_width && stripe_width <= sbi->s_blocks_per_group)
|
|
ret = stripe_width;
|
|
else if (stride && stride <= sbi->s_blocks_per_group)
|
|
ret = stride;
|
|
else
|
|
ret = 0;
|
|
|
|
/*
|
|
* If the stripe width is 1, this makes no sense and
|
|
* we set it to 0 to turn off stripe handling code.
|
|
*/
|
|
if (ret <= 1)
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Check whether this filesystem can be mounted based on
|
|
* the features present and the RDONLY/RDWR mount requested.
|
|
* Returns 1 if this filesystem can be mounted as requested,
|
|
* 0 if it cannot be.
|
|
*/
|
|
int ext4_feature_set_ok(struct super_block *sb, int readonly)
|
|
{
|
|
if (ext4_has_unknown_ext4_incompat_features(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Couldn't mount because of "
|
|
"unsupported optional features (%x)",
|
|
(le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) &
|
|
~EXT4_FEATURE_INCOMPAT_SUPP));
|
|
return 0;
|
|
}
|
|
|
|
#if !IS_ENABLED(CONFIG_UNICODE)
|
|
if (ext4_has_feature_casefold(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Filesystem with casefold feature cannot be "
|
|
"mounted without CONFIG_UNICODE");
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
if (readonly)
|
|
return 1;
|
|
|
|
if (ext4_has_feature_readonly(sb)) {
|
|
ext4_msg(sb, KERN_INFO, "filesystem is read-only");
|
|
sb->s_flags |= SB_RDONLY;
|
|
return 1;
|
|
}
|
|
|
|
/* Check that feature set is OK for a read-write mount */
|
|
if (ext4_has_unknown_ext4_ro_compat_features(sb)) {
|
|
ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of "
|
|
"unsupported optional features (%x)",
|
|
(le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) &
|
|
~EXT4_FEATURE_RO_COMPAT_SUPP));
|
|
return 0;
|
|
}
|
|
if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Can't support bigalloc feature without "
|
|
"extents feature\n");
|
|
return 0;
|
|
}
|
|
|
|
#if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2)
|
|
if (!readonly && (ext4_has_feature_quota(sb) ||
|
|
ext4_has_feature_project(sb))) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2");
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_QUOTA */
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* This function is called once a day if we have errors logged
|
|
* on the file system
|
|
*/
|
|
static void print_daily_error_info(struct timer_list *t)
|
|
{
|
|
struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report);
|
|
struct super_block *sb = sbi->s_sb;
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
|
|
if (es->s_error_count)
|
|
/* fsck newer than v1.41.13 is needed to clean this condition. */
|
|
ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u",
|
|
le32_to_cpu(es->s_error_count));
|
|
if (es->s_first_error_time) {
|
|
printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d",
|
|
sb->s_id,
|
|
ext4_get_tstamp(es, s_first_error_time),
|
|
(int) sizeof(es->s_first_error_func),
|
|
es->s_first_error_func,
|
|
le32_to_cpu(es->s_first_error_line));
|
|
if (es->s_first_error_ino)
|
|
printk(KERN_CONT ": inode %u",
|
|
le32_to_cpu(es->s_first_error_ino));
|
|
if (es->s_first_error_block)
|
|
printk(KERN_CONT ": block %llu", (unsigned long long)
|
|
le64_to_cpu(es->s_first_error_block));
|
|
printk(KERN_CONT "\n");
|
|
}
|
|
if (es->s_last_error_time) {
|
|
printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d",
|
|
sb->s_id,
|
|
ext4_get_tstamp(es, s_last_error_time),
|
|
(int) sizeof(es->s_last_error_func),
|
|
es->s_last_error_func,
|
|
le32_to_cpu(es->s_last_error_line));
|
|
if (es->s_last_error_ino)
|
|
printk(KERN_CONT ": inode %u",
|
|
le32_to_cpu(es->s_last_error_ino));
|
|
if (es->s_last_error_block)
|
|
printk(KERN_CONT ": block %llu", (unsigned long long)
|
|
le64_to_cpu(es->s_last_error_block));
|
|
printk(KERN_CONT "\n");
|
|
}
|
|
mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */
|
|
}
|
|
|
|
/* Find next suitable group and run ext4_init_inode_table */
|
|
static int ext4_run_li_request(struct ext4_li_request *elr)
|
|
{
|
|
struct ext4_group_desc *gdp = NULL;
|
|
struct super_block *sb = elr->lr_super;
|
|
ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
|
|
ext4_group_t group = elr->lr_next_group;
|
|
unsigned int prefetch_ios = 0;
|
|
int ret = 0;
|
|
int nr = EXT4_SB(sb)->s_mb_prefetch;
|
|
u64 start_time;
|
|
|
|
if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) {
|
|
elr->lr_next_group = ext4_mb_prefetch(sb, group, nr, &prefetch_ios);
|
|
ext4_mb_prefetch_fini(sb, elr->lr_next_group, nr);
|
|
trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, nr);
|
|
if (group >= elr->lr_next_group) {
|
|
ret = 1;
|
|
if (elr->lr_first_not_zeroed != ngroups &&
|
|
!sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) {
|
|
elr->lr_next_group = elr->lr_first_not_zeroed;
|
|
elr->lr_mode = EXT4_LI_MODE_ITABLE;
|
|
ret = 0;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
for (; group < ngroups; group++) {
|
|
gdp = ext4_get_group_desc(sb, group, NULL);
|
|
if (!gdp) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))
|
|
break;
|
|
}
|
|
|
|
if (group >= ngroups)
|
|
ret = 1;
|
|
|
|
if (!ret) {
|
|
start_time = ktime_get_real_ns();
|
|
ret = ext4_init_inode_table(sb, group,
|
|
elr->lr_timeout ? 0 : 1);
|
|
trace_ext4_lazy_itable_init(sb, group);
|
|
if (elr->lr_timeout == 0) {
|
|
elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) *
|
|
EXT4_SB(elr->lr_super)->s_li_wait_mult);
|
|
}
|
|
elr->lr_next_sched = jiffies + elr->lr_timeout;
|
|
elr->lr_next_group = group + 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Remove lr_request from the list_request and free the
|
|
* request structure. Should be called with li_list_mtx held
|
|
*/
|
|
static void ext4_remove_li_request(struct ext4_li_request *elr)
|
|
{
|
|
if (!elr)
|
|
return;
|
|
|
|
list_del(&elr->lr_request);
|
|
EXT4_SB(elr->lr_super)->s_li_request = NULL;
|
|
kfree(elr);
|
|
}
|
|
|
|
static void ext4_unregister_li_request(struct super_block *sb)
|
|
{
|
|
mutex_lock(&ext4_li_mtx);
|
|
if (!ext4_li_info) {
|
|
mutex_unlock(&ext4_li_mtx);
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&ext4_li_info->li_list_mtx);
|
|
ext4_remove_li_request(EXT4_SB(sb)->s_li_request);
|
|
mutex_unlock(&ext4_li_info->li_list_mtx);
|
|
mutex_unlock(&ext4_li_mtx);
|
|
}
|
|
|
|
static struct task_struct *ext4_lazyinit_task;
|
|
|
|
/*
|
|
* This is the function where ext4lazyinit thread lives. It walks
|
|
* through the request list searching for next scheduled filesystem.
|
|
* When such a fs is found, run the lazy initialization request
|
|
* (ext4_rn_li_request) and keep track of the time spend in this
|
|
* function. Based on that time we compute next schedule time of
|
|
* the request. When walking through the list is complete, compute
|
|
* next waking time and put itself into sleep.
|
|
*/
|
|
static int ext4_lazyinit_thread(void *arg)
|
|
{
|
|
struct ext4_lazy_init *eli = arg;
|
|
struct list_head *pos, *n;
|
|
struct ext4_li_request *elr;
|
|
unsigned long next_wakeup, cur;
|
|
|
|
BUG_ON(NULL == eli);
|
|
set_freezable();
|
|
|
|
cont_thread:
|
|
while (true) {
|
|
next_wakeup = MAX_JIFFY_OFFSET;
|
|
|
|
mutex_lock(&eli->li_list_mtx);
|
|
if (list_empty(&eli->li_request_list)) {
|
|
mutex_unlock(&eli->li_list_mtx);
|
|
goto exit_thread;
|
|
}
|
|
list_for_each_safe(pos, n, &eli->li_request_list) {
|
|
int err = 0;
|
|
int progress = 0;
|
|
elr = list_entry(pos, struct ext4_li_request,
|
|
lr_request);
|
|
|
|
if (time_before(jiffies, elr->lr_next_sched)) {
|
|
if (time_before(elr->lr_next_sched, next_wakeup))
|
|
next_wakeup = elr->lr_next_sched;
|
|
continue;
|
|
}
|
|
if (down_read_trylock(&elr->lr_super->s_umount)) {
|
|
if (sb_start_write_trylock(elr->lr_super)) {
|
|
progress = 1;
|
|
/*
|
|
* We hold sb->s_umount, sb can not
|
|
* be removed from the list, it is
|
|
* now safe to drop li_list_mtx
|
|
*/
|
|
mutex_unlock(&eli->li_list_mtx);
|
|
err = ext4_run_li_request(elr);
|
|
sb_end_write(elr->lr_super);
|
|
mutex_lock(&eli->li_list_mtx);
|
|
n = pos->next;
|
|
}
|
|
up_read((&elr->lr_super->s_umount));
|
|
}
|
|
/* error, remove the lazy_init job */
|
|
if (err) {
|
|
ext4_remove_li_request(elr);
|
|
continue;
|
|
}
|
|
if (!progress) {
|
|
elr->lr_next_sched = jiffies +
|
|
get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);
|
|
}
|
|
if (time_before(elr->lr_next_sched, next_wakeup))
|
|
next_wakeup = elr->lr_next_sched;
|
|
}
|
|
mutex_unlock(&eli->li_list_mtx);
|
|
|
|
try_to_freeze();
|
|
|
|
cur = jiffies;
|
|
if ((time_after_eq(cur, next_wakeup)) ||
|
|
(MAX_JIFFY_OFFSET == next_wakeup)) {
|
|
cond_resched();
|
|
continue;
|
|
}
|
|
|
|
schedule_timeout_interruptible(next_wakeup - cur);
|
|
|
|
if (kthread_should_stop()) {
|
|
ext4_clear_request_list();
|
|
goto exit_thread;
|
|
}
|
|
}
|
|
|
|
exit_thread:
|
|
/*
|
|
* It looks like the request list is empty, but we need
|
|
* to check it under the li_list_mtx lock, to prevent any
|
|
* additions into it, and of course we should lock ext4_li_mtx
|
|
* to atomically free the list and ext4_li_info, because at
|
|
* this point another ext4 filesystem could be registering
|
|
* new one.
|
|
*/
|
|
mutex_lock(&ext4_li_mtx);
|
|
mutex_lock(&eli->li_list_mtx);
|
|
if (!list_empty(&eli->li_request_list)) {
|
|
mutex_unlock(&eli->li_list_mtx);
|
|
mutex_unlock(&ext4_li_mtx);
|
|
goto cont_thread;
|
|
}
|
|
mutex_unlock(&eli->li_list_mtx);
|
|
kfree(ext4_li_info);
|
|
ext4_li_info = NULL;
|
|
mutex_unlock(&ext4_li_mtx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ext4_clear_request_list(void)
|
|
{
|
|
struct list_head *pos, *n;
|
|
struct ext4_li_request *elr;
|
|
|
|
mutex_lock(&ext4_li_info->li_list_mtx);
|
|
list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {
|
|
elr = list_entry(pos, struct ext4_li_request,
|
|
lr_request);
|
|
ext4_remove_li_request(elr);
|
|
}
|
|
mutex_unlock(&ext4_li_info->li_list_mtx);
|
|
}
|
|
|
|
static int ext4_run_lazyinit_thread(void)
|
|
{
|
|
ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread,
|
|
ext4_li_info, "ext4lazyinit");
|
|
if (IS_ERR(ext4_lazyinit_task)) {
|
|
int err = PTR_ERR(ext4_lazyinit_task);
|
|
ext4_clear_request_list();
|
|
kfree(ext4_li_info);
|
|
ext4_li_info = NULL;
|
|
printk(KERN_CRIT "EXT4-fs: error %d creating inode table "
|
|
"initialization thread\n",
|
|
err);
|
|
return err;
|
|
}
|
|
ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check whether it make sense to run itable init. thread or not.
|
|
* If there is at least one uninitialized inode table, return
|
|
* corresponding group number, else the loop goes through all
|
|
* groups and return total number of groups.
|
|
*/
|
|
static ext4_group_t ext4_has_uninit_itable(struct super_block *sb)
|
|
{
|
|
ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count;
|
|
struct ext4_group_desc *gdp = NULL;
|
|
|
|
if (!ext4_has_group_desc_csum(sb))
|
|
return ngroups;
|
|
|
|
for (group = 0; group < ngroups; group++) {
|
|
gdp = ext4_get_group_desc(sb, group, NULL);
|
|
if (!gdp)
|
|
continue;
|
|
|
|
if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))
|
|
break;
|
|
}
|
|
|
|
return group;
|
|
}
|
|
|
|
static int ext4_li_info_new(void)
|
|
{
|
|
struct ext4_lazy_init *eli = NULL;
|
|
|
|
eli = kzalloc(sizeof(*eli), GFP_KERNEL);
|
|
if (!eli)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&eli->li_request_list);
|
|
mutex_init(&eli->li_list_mtx);
|
|
|
|
eli->li_state |= EXT4_LAZYINIT_QUIT;
|
|
|
|
ext4_li_info = eli;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ext4_li_request *ext4_li_request_new(struct super_block *sb,
|
|
ext4_group_t start)
|
|
{
|
|
struct ext4_li_request *elr;
|
|
|
|
elr = kzalloc(sizeof(*elr), GFP_KERNEL);
|
|
if (!elr)
|
|
return NULL;
|
|
|
|
elr->lr_super = sb;
|
|
elr->lr_first_not_zeroed = start;
|
|
if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) {
|
|
elr->lr_mode = EXT4_LI_MODE_ITABLE;
|
|
elr->lr_next_group = start;
|
|
} else {
|
|
elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP;
|
|
}
|
|
|
|
/*
|
|
* Randomize first schedule time of the request to
|
|
* spread the inode table initialization requests
|
|
* better.
|
|
*/
|
|
elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);
|
|
return elr;
|
|
}
|
|
|
|
int ext4_register_li_request(struct super_block *sb,
|
|
ext4_group_t first_not_zeroed)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_li_request *elr = NULL;
|
|
ext4_group_t ngroups = sbi->s_groups_count;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&ext4_li_mtx);
|
|
if (sbi->s_li_request != NULL) {
|
|
/*
|
|
* Reset timeout so it can be computed again, because
|
|
* s_li_wait_mult might have changed.
|
|
*/
|
|
sbi->s_li_request->lr_timeout = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (sb_rdonly(sb) ||
|
|
(test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) &&
|
|
(first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE))))
|
|
goto out;
|
|
|
|
elr = ext4_li_request_new(sb, first_not_zeroed);
|
|
if (!elr) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
if (NULL == ext4_li_info) {
|
|
ret = ext4_li_info_new();
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
mutex_lock(&ext4_li_info->li_list_mtx);
|
|
list_add(&elr->lr_request, &ext4_li_info->li_request_list);
|
|
mutex_unlock(&ext4_li_info->li_list_mtx);
|
|
|
|
sbi->s_li_request = elr;
|
|
/*
|
|
* set elr to NULL here since it has been inserted to
|
|
* the request_list and the removal and free of it is
|
|
* handled by ext4_clear_request_list from now on.
|
|
*/
|
|
elr = NULL;
|
|
|
|
if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) {
|
|
ret = ext4_run_lazyinit_thread();
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
out:
|
|
mutex_unlock(&ext4_li_mtx);
|
|
if (ret)
|
|
kfree(elr);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We do not need to lock anything since this is called on
|
|
* module unload.
|
|
*/
|
|
static void ext4_destroy_lazyinit_thread(void)
|
|
{
|
|
/*
|
|
* If thread exited earlier
|
|
* there's nothing to be done.
|
|
*/
|
|
if (!ext4_li_info || !ext4_lazyinit_task)
|
|
return;
|
|
|
|
kthread_stop(ext4_lazyinit_task);
|
|
}
|
|
|
|
static int set_journal_csum_feature_set(struct super_block *sb)
|
|
{
|
|
int ret = 1;
|
|
int compat, incompat;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (ext4_has_metadata_csum(sb)) {
|
|
/* journal checksum v3 */
|
|
compat = 0;
|
|
incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3;
|
|
} else {
|
|
/* journal checksum v1 */
|
|
compat = JBD2_FEATURE_COMPAT_CHECKSUM;
|
|
incompat = 0;
|
|
}
|
|
|
|
jbd2_journal_clear_features(sbi->s_journal,
|
|
JBD2_FEATURE_COMPAT_CHECKSUM, 0,
|
|
JBD2_FEATURE_INCOMPAT_CSUM_V3 |
|
|
JBD2_FEATURE_INCOMPAT_CSUM_V2);
|
|
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
|
|
ret = jbd2_journal_set_features(sbi->s_journal,
|
|
compat, 0,
|
|
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT |
|
|
incompat);
|
|
} else if (test_opt(sb, JOURNAL_CHECKSUM)) {
|
|
ret = jbd2_journal_set_features(sbi->s_journal,
|
|
compat, 0,
|
|
incompat);
|
|
jbd2_journal_clear_features(sbi->s_journal, 0, 0,
|
|
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
|
|
} else {
|
|
jbd2_journal_clear_features(sbi->s_journal, 0, 0,
|
|
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Note: calculating the overhead so we can be compatible with
|
|
* historical BSD practice is quite difficult in the face of
|
|
* clusters/bigalloc. This is because multiple metadata blocks from
|
|
* different block group can end up in the same allocation cluster.
|
|
* Calculating the exact overhead in the face of clustered allocation
|
|
* requires either O(all block bitmaps) in memory or O(number of block
|
|
* groups**2) in time. We will still calculate the superblock for
|
|
* older file systems --- and if we come across with a bigalloc file
|
|
* system with zero in s_overhead_clusters the estimate will be close to
|
|
* correct especially for very large cluster sizes --- but for newer
|
|
* file systems, it's better to calculate this figure once at mkfs
|
|
* time, and store it in the superblock. If the superblock value is
|
|
* present (even for non-bigalloc file systems), we will use it.
|
|
*/
|
|
static int count_overhead(struct super_block *sb, ext4_group_t grp,
|
|
char *buf)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_group_desc *gdp;
|
|
ext4_fsblk_t first_block, last_block, b;
|
|
ext4_group_t i, ngroups = ext4_get_groups_count(sb);
|
|
int s, j, count = 0;
|
|
int has_super = ext4_bg_has_super(sb, grp);
|
|
|
|
if (!ext4_has_feature_bigalloc(sb))
|
|
return (has_super + ext4_bg_num_gdb(sb, grp) +
|
|
(has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) +
|
|
sbi->s_itb_per_group + 2);
|
|
|
|
first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +
|
|
(grp * EXT4_BLOCKS_PER_GROUP(sb));
|
|
last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;
|
|
for (i = 0; i < ngroups; i++) {
|
|
gdp = ext4_get_group_desc(sb, i, NULL);
|
|
b = ext4_block_bitmap(sb, gdp);
|
|
if (b >= first_block && b <= last_block) {
|
|
ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);
|
|
count++;
|
|
}
|
|
b = ext4_inode_bitmap(sb, gdp);
|
|
if (b >= first_block && b <= last_block) {
|
|
ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf);
|
|
count++;
|
|
}
|
|
b = ext4_inode_table(sb, gdp);
|
|
if (b >= first_block && b + sbi->s_itb_per_group <= last_block)
|
|
for (j = 0; j < sbi->s_itb_per_group; j++, b++) {
|
|
int c = EXT4_B2C(sbi, b - first_block);
|
|
ext4_set_bit(c, buf);
|
|
count++;
|
|
}
|
|
if (i != grp)
|
|
continue;
|
|
s = 0;
|
|
if (ext4_bg_has_super(sb, grp)) {
|
|
ext4_set_bit(s++, buf);
|
|
count++;
|
|
}
|
|
j = ext4_bg_num_gdb(sb, grp);
|
|
if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) {
|
|
ext4_error(sb, "Invalid number of block group "
|
|
"descriptor blocks: %d", j);
|
|
j = EXT4_BLOCKS_PER_GROUP(sb) - s;
|
|
}
|
|
count += j;
|
|
for (; j > 0; j--)
|
|
ext4_set_bit(EXT4_B2C(sbi, s++), buf);
|
|
}
|
|
if (!count)
|
|
return 0;
|
|
return EXT4_CLUSTERS_PER_GROUP(sb) -
|
|
ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8);
|
|
}
|
|
|
|
/*
|
|
* Compute the overhead and stash it in sbi->s_overhead
|
|
*/
|
|
int ext4_calculate_overhead(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
struct inode *j_inode;
|
|
unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum);
|
|
ext4_group_t i, ngroups = ext4_get_groups_count(sb);
|
|
ext4_fsblk_t overhead = 0;
|
|
char *buf = (char *) get_zeroed_page(GFP_NOFS);
|
|
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Compute the overhead (FS structures). This is constant
|
|
* for a given filesystem unless the number of block groups
|
|
* changes so we cache the previous value until it does.
|
|
*/
|
|
|
|
/*
|
|
* All of the blocks before first_data_block are overhead
|
|
*/
|
|
overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block));
|
|
|
|
/*
|
|
* Add the overhead found in each block group
|
|
*/
|
|
for (i = 0; i < ngroups; i++) {
|
|
int blks;
|
|
|
|
blks = count_overhead(sb, i, buf);
|
|
overhead += blks;
|
|
if (blks)
|
|
memset(buf, 0, PAGE_SIZE);
|
|
cond_resched();
|
|
}
|
|
|
|
/*
|
|
* Add the internal journal blocks whether the journal has been
|
|
* loaded or not
|
|
*/
|
|
if (sbi->s_journal && !sbi->s_journal_bdev_file)
|
|
overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len);
|
|
else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) {
|
|
/* j_inum for internal journal is non-zero */
|
|
j_inode = ext4_get_journal_inode(sb, j_inum);
|
|
if (!IS_ERR(j_inode)) {
|
|
j_blocks = j_inode->i_size >> sb->s_blocksize_bits;
|
|
overhead += EXT4_NUM_B2C(sbi, j_blocks);
|
|
iput(j_inode);
|
|
} else {
|
|
ext4_msg(sb, KERN_ERR, "can't get journal size");
|
|
}
|
|
}
|
|
sbi->s_overhead = overhead;
|
|
smp_wmb();
|
|
free_page((unsigned long) buf);
|
|
return 0;
|
|
}
|
|
|
|
static void ext4_set_resv_clusters(struct super_block *sb)
|
|
{
|
|
ext4_fsblk_t resv_clusters;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
/*
|
|
* There's no need to reserve anything when we aren't using extents.
|
|
* The space estimates are exact, there are no unwritten extents,
|
|
* hole punching doesn't need new metadata... This is needed especially
|
|
* to keep ext2/3 backward compatibility.
|
|
*/
|
|
if (!ext4_has_feature_extents(sb))
|
|
return;
|
|
/*
|
|
* By default we reserve 2% or 4096 clusters, whichever is smaller.
|
|
* This should cover the situations where we can not afford to run
|
|
* out of space like for example punch hole, or converting
|
|
* unwritten extents in delalloc path. In most cases such
|
|
* allocation would require 1, or 2 blocks, higher numbers are
|
|
* very rare.
|
|
*/
|
|
resv_clusters = (ext4_blocks_count(sbi->s_es) >>
|
|
sbi->s_cluster_bits);
|
|
|
|
do_div(resv_clusters, 50);
|
|
resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096);
|
|
|
|
atomic64_set(&sbi->s_resv_clusters, resv_clusters);
|
|
}
|
|
|
|
static const char *ext4_quota_mode(struct super_block *sb)
|
|
{
|
|
#ifdef CONFIG_QUOTA
|
|
if (!ext4_quota_capable(sb))
|
|
return "none";
|
|
|
|
if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb))
|
|
return "journalled";
|
|
else
|
|
return "writeback";
|
|
#else
|
|
return "disabled";
|
|
#endif
|
|
}
|
|
|
|
static void ext4_setup_csum_trigger(struct super_block *sb,
|
|
enum ext4_journal_trigger_type type,
|
|
void (*trigger)(
|
|
struct jbd2_buffer_trigger_type *type,
|
|
struct buffer_head *bh,
|
|
void *mapped_data,
|
|
size_t size))
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
sbi->s_journal_triggers[type].sb = sb;
|
|
sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger;
|
|
}
|
|
|
|
static void ext4_free_sbi(struct ext4_sb_info *sbi)
|
|
{
|
|
if (!sbi)
|
|
return;
|
|
|
|
kfree(sbi->s_blockgroup_lock);
|
|
fs_put_dax(sbi->s_daxdev, NULL);
|
|
kfree(sbi);
|
|
}
|
|
|
|
static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi;
|
|
|
|
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
|
|
if (!sbi)
|
|
return NULL;
|
|
|
|
sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off,
|
|
NULL, NULL);
|
|
|
|
sbi->s_blockgroup_lock =
|
|
kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
|
|
|
|
if (!sbi->s_blockgroup_lock)
|
|
goto err_out;
|
|
|
|
sb->s_fs_info = sbi;
|
|
sbi->s_sb = sb;
|
|
return sbi;
|
|
err_out:
|
|
fs_put_dax(sbi->s_daxdev, NULL);
|
|
kfree(sbi);
|
|
return NULL;
|
|
}
|
|
|
|
static void ext4_set_def_opts(struct super_block *sb,
|
|
struct ext4_super_block *es)
|
|
{
|
|
unsigned long def_mount_opts;
|
|
|
|
/* Set defaults before we parse the mount options */
|
|
def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
|
|
set_opt(sb, INIT_INODE_TABLE);
|
|
if (def_mount_opts & EXT4_DEFM_DEBUG)
|
|
set_opt(sb, DEBUG);
|
|
if (def_mount_opts & EXT4_DEFM_BSDGROUPS)
|
|
set_opt(sb, GRPID);
|
|
if (def_mount_opts & EXT4_DEFM_UID16)
|
|
set_opt(sb, NO_UID32);
|
|
/* xattr user namespace & acls are now defaulted on */
|
|
set_opt(sb, XATTR_USER);
|
|
#ifdef CONFIG_EXT4_FS_POSIX_ACL
|
|
set_opt(sb, POSIX_ACL);
|
|
#endif
|
|
if (ext4_has_feature_fast_commit(sb))
|
|
set_opt2(sb, JOURNAL_FAST_COMMIT);
|
|
/* don't forget to enable journal_csum when metadata_csum is enabled. */
|
|
if (ext4_has_metadata_csum(sb))
|
|
set_opt(sb, JOURNAL_CHECKSUM);
|
|
|
|
if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA)
|
|
set_opt(sb, JOURNAL_DATA);
|
|
else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED)
|
|
set_opt(sb, ORDERED_DATA);
|
|
else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK)
|
|
set_opt(sb, WRITEBACK_DATA);
|
|
|
|
if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC)
|
|
set_opt(sb, ERRORS_PANIC);
|
|
else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE)
|
|
set_opt(sb, ERRORS_CONT);
|
|
else
|
|
set_opt(sb, ERRORS_RO);
|
|
/* block_validity enabled by default; disable with noblock_validity */
|
|
set_opt(sb, BLOCK_VALIDITY);
|
|
if (def_mount_opts & EXT4_DEFM_DISCARD)
|
|
set_opt(sb, DISCARD);
|
|
|
|
if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0)
|
|
set_opt(sb, BARRIER);
|
|
|
|
/*
|
|
* enable delayed allocation by default
|
|
* Use -o nodelalloc to turn it off
|
|
*/
|
|
if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) &&
|
|
((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0))
|
|
set_opt(sb, DELALLOC);
|
|
|
|
if (sb->s_blocksize <= PAGE_SIZE)
|
|
set_opt(sb, DIOREAD_NOLOCK);
|
|
}
|
|
|
|
static int ext4_handle_clustersize(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
int clustersize;
|
|
|
|
/* Handle clustersize */
|
|
clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size);
|
|
if (ext4_has_feature_bigalloc(sb)) {
|
|
if (clustersize < sb->s_blocksize) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"cluster size (%d) smaller than "
|
|
"block size (%lu)", clustersize, sb->s_blocksize);
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) -
|
|
le32_to_cpu(es->s_log_block_size);
|
|
} else {
|
|
if (clustersize != sb->s_blocksize) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"fragment/cluster size (%d) != "
|
|
"block size (%lu)", clustersize, sb->s_blocksize);
|
|
return -EINVAL;
|
|
}
|
|
if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"#blocks per group too big: %lu",
|
|
sbi->s_blocks_per_group);
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_cluster_bits = 0;
|
|
}
|
|
sbi->s_clusters_per_group = le32_to_cpu(es->s_clusters_per_group);
|
|
if (sbi->s_clusters_per_group > sb->s_blocksize * 8) {
|
|
ext4_msg(sb, KERN_ERR, "#clusters per group too big: %lu",
|
|
sbi->s_clusters_per_group);
|
|
return -EINVAL;
|
|
}
|
|
if (sbi->s_blocks_per_group !=
|
|
(sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"blocks per group (%lu) and clusters per group (%lu) inconsistent",
|
|
sbi->s_blocks_per_group, sbi->s_clusters_per_group);
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_cluster_ratio = clustersize / sb->s_blocksize;
|
|
|
|
/* Do we have standard group size of clustersize * 8 blocks ? */
|
|
if (sbi->s_blocks_per_group == clustersize << 3)
|
|
set_opt2(sb, STD_GROUP_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ext4_fast_commit_init(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
/* Initialize fast commit stuff */
|
|
atomic_set(&sbi->s_fc_subtid, 0);
|
|
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);
|
|
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);
|
|
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);
|
|
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);
|
|
sbi->s_fc_bytes = 0;
|
|
ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE);
|
|
sbi->s_fc_ineligible_tid = 0;
|
|
spin_lock_init(&sbi->s_fc_lock);
|
|
memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));
|
|
sbi->s_fc_replay_state.fc_regions = NULL;
|
|
sbi->s_fc_replay_state.fc_regions_size = 0;
|
|
sbi->s_fc_replay_state.fc_regions_used = 0;
|
|
sbi->s_fc_replay_state.fc_regions_valid = 0;
|
|
sbi->s_fc_replay_state.fc_modified_inodes = NULL;
|
|
sbi->s_fc_replay_state.fc_modified_inodes_size = 0;
|
|
sbi->s_fc_replay_state.fc_modified_inodes_used = 0;
|
|
}
|
|
|
|
static int ext4_inode_info_init(struct super_block *sb,
|
|
struct ext4_super_block *es)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {
|
|
sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;
|
|
sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;
|
|
} else {
|
|
sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
|
|
sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
|
|
if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {
|
|
ext4_msg(sb, KERN_ERR, "invalid first ino: %u",
|
|
sbi->s_first_ino);
|
|
return -EINVAL;
|
|
}
|
|
if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
|
|
(!is_power_of_2(sbi->s_inode_size)) ||
|
|
(sbi->s_inode_size > sb->s_blocksize)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"unsupported inode size: %d",
|
|
sbi->s_inode_size);
|
|
ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize);
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* i_atime_extra is the last extra field available for
|
|
* [acm]times in struct ext4_inode. Checking for that
|
|
* field should suffice to ensure we have extra space
|
|
* for all three.
|
|
*/
|
|
if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +
|
|
sizeof(((struct ext4_inode *)0)->i_atime_extra)) {
|
|
sb->s_time_gran = 1;
|
|
sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;
|
|
} else {
|
|
sb->s_time_gran = NSEC_PER_SEC;
|
|
sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;
|
|
}
|
|
sb->s_time_min = EXT4_TIMESTAMP_MIN;
|
|
}
|
|
|
|
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
|
|
sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
|
|
EXT4_GOOD_OLD_INODE_SIZE;
|
|
if (ext4_has_feature_extra_isize(sb)) {
|
|
unsigned v, max = (sbi->s_inode_size -
|
|
EXT4_GOOD_OLD_INODE_SIZE);
|
|
|
|
v = le16_to_cpu(es->s_want_extra_isize);
|
|
if (v > max) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"bad s_want_extra_isize: %d", v);
|
|
return -EINVAL;
|
|
}
|
|
if (sbi->s_want_extra_isize < v)
|
|
sbi->s_want_extra_isize = v;
|
|
|
|
v = le16_to_cpu(es->s_min_extra_isize);
|
|
if (v > max) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"bad s_min_extra_isize: %d", v);
|
|
return -EINVAL;
|
|
}
|
|
if (sbi->s_want_extra_isize < v)
|
|
sbi->s_want_extra_isize = v;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_UNICODE)
|
|
static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)
|
|
{
|
|
const struct ext4_sb_encodings *encoding_info;
|
|
struct unicode_map *encoding;
|
|
__u16 encoding_flags = le16_to_cpu(es->s_encoding_flags);
|
|
|
|
if (!ext4_has_feature_casefold(sb) || sb->s_encoding)
|
|
return 0;
|
|
|
|
encoding_info = ext4_sb_read_encoding(es);
|
|
if (!encoding_info) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Encoding requested by superblock is unknown");
|
|
return -EINVAL;
|
|
}
|
|
|
|
encoding = utf8_load(encoding_info->version);
|
|
if (IS_ERR(encoding)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"can't mount with superblock charset: %s-%u.%u.%u "
|
|
"not supported by the kernel. flags: 0x%x.",
|
|
encoding_info->name,
|
|
unicode_major(encoding_info->version),
|
|
unicode_minor(encoding_info->version),
|
|
unicode_rev(encoding_info->version),
|
|
encoding_flags);
|
|
return -EINVAL;
|
|
}
|
|
ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: "
|
|
"%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
|
|
unicode_major(encoding_info->version),
|
|
unicode_minor(encoding_info->version),
|
|
unicode_rev(encoding_info->version),
|
|
encoding_flags);
|
|
|
|
sb->s_encoding = encoding;
|
|
sb->s_encoding_flags = encoding_flags;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
/* Warn if metadata_csum and gdt_csum are both set. */
|
|
if (ext4_has_feature_metadata_csum(sb) &&
|
|
ext4_has_feature_gdt_csum(sb))
|
|
ext4_warning(sb, "metadata_csum and uninit_bg are "
|
|
"redundant flags; please run fsck.");
|
|
|
|
/* Check for a known checksum algorithm */
|
|
if (!ext4_verify_csum_type(sb, es)) {
|
|
ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
|
|
"unknown checksum algorithm.");
|
|
return -EINVAL;
|
|
}
|
|
ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE,
|
|
ext4_orphan_file_block_trigger);
|
|
|
|
/* Load the checksum driver */
|
|
sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
|
|
if (IS_ERR(sbi->s_chksum_driver)) {
|
|
int ret = PTR_ERR(sbi->s_chksum_driver);
|
|
ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver.");
|
|
sbi->s_chksum_driver = NULL;
|
|
return ret;
|
|
}
|
|
|
|
/* Check superblock checksum */
|
|
if (!ext4_superblock_csum_verify(sb, es)) {
|
|
ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with "
|
|
"invalid superblock checksum. Run e2fsck?");
|
|
return -EFSBADCRC;
|
|
}
|
|
|
|
/* Precompute checksum seed for all metadata */
|
|
if (ext4_has_feature_csum_seed(sb))
|
|
sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed);
|
|
else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb))
|
|
sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
|
|
sizeof(es->s_uuid));
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_check_feature_compatibility(struct super_block *sb,
|
|
struct ext4_super_block *es,
|
|
int silent)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&
|
|
(ext4_has_compat_features(sb) ||
|
|
ext4_has_ro_compat_features(sb) ||
|
|
ext4_has_incompat_features(sb)))
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"feature flags set on rev 0 fs, "
|
|
"running e2fsck is recommended");
|
|
|
|
if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) {
|
|
set_opt2(sb, HURD_COMPAT);
|
|
if (ext4_has_feature_64bit(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"The Hurd can't support 64-bit file systems");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* ea_inode feature uses l_i_version field which is not
|
|
* available in HURD_COMPAT mode.
|
|
*/
|
|
if (ext4_has_feature_ea_inode(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"ea_inode feature is not supported for Hurd");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (IS_EXT2_SB(sb)) {
|
|
if (ext2_feature_set_ok(sb))
|
|
ext4_msg(sb, KERN_INFO, "mounting ext2 file system "
|
|
"using the ext4 subsystem");
|
|
else {
|
|
/*
|
|
* If we're probing be silent, if this looks like
|
|
* it's actually an ext[34] filesystem.
|
|
*/
|
|
if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb)))
|
|
return -EINVAL;
|
|
ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due "
|
|
"to feature incompatibilities");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (IS_EXT3_SB(sb)) {
|
|
if (ext3_feature_set_ok(sb))
|
|
ext4_msg(sb, KERN_INFO, "mounting ext3 file system "
|
|
"using the ext4 subsystem");
|
|
else {
|
|
/*
|
|
* If we're probing be silent, if this looks like
|
|
* it's actually an ext4 filesystem.
|
|
*/
|
|
if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb)))
|
|
return -EINVAL;
|
|
ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due "
|
|
"to feature incompatibilities");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check feature flags regardless of the revision level, since we
|
|
* previously didn't change the revision level when setting the flags,
|
|
* so there is a chance incompat flags are set on a rev 0 filesystem.
|
|
*/
|
|
if (!ext4_feature_set_ok(sb, (sb_rdonly(sb))))
|
|
return -EINVAL;
|
|
|
|
if (sbi->s_daxdev) {
|
|
if (sb->s_blocksize == PAGE_SIZE)
|
|
set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
|
|
else
|
|
ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n");
|
|
}
|
|
|
|
if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {
|
|
if (ext4_has_feature_inline_data(sb)) {
|
|
ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"
|
|
" that may contain inline data");
|
|
return -EINVAL;
|
|
}
|
|
if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"DAX unsupported by block device.");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
|
|
ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d",
|
|
es->s_encryption_level);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_check_geometry(struct super_block *sb,
|
|
struct ext4_super_block *es)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
__u64 blocks_count;
|
|
int err;
|
|
|
|
if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Number of reserved GDT blocks insanely large: %d",
|
|
le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));
|
|
return -EINVAL;
|
|
}
|
|
/*
|
|
* Test whether we have more sectors than will fit in sector_t,
|
|
* and whether the max offset is addressable by the page cache.
|
|
*/
|
|
err = generic_check_addressable(sb->s_blocksize_bits,
|
|
ext4_blocks_count(es));
|
|
if (err) {
|
|
ext4_msg(sb, KERN_ERR, "filesystem"
|
|
" too large to mount safely on this system");
|
|
return err;
|
|
}
|
|
|
|
/* check blocks count against device size */
|
|
blocks_count = sb_bdev_nr_blocks(sb);
|
|
if (blocks_count && ext4_blocks_count(es) > blocks_count) {
|
|
ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu "
|
|
"exceeds size of device (%llu blocks)",
|
|
ext4_blocks_count(es), blocks_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* It makes no sense for the first data block to be beyond the end
|
|
* of the filesystem.
|
|
*/
|
|
if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) {
|
|
ext4_msg(sb, KERN_WARNING, "bad geometry: first data "
|
|
"block %u is beyond end of filesystem (%llu)",
|
|
le32_to_cpu(es->s_first_data_block),
|
|
ext4_blocks_count(es));
|
|
return -EINVAL;
|
|
}
|
|
if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) &&
|
|
(sbi->s_cluster_ratio == 1)) {
|
|
ext4_msg(sb, KERN_WARNING, "bad geometry: first data "
|
|
"block is 0 with a 1k block and cluster size");
|
|
return -EINVAL;
|
|
}
|
|
|
|
blocks_count = (ext4_blocks_count(es) -
|
|
le32_to_cpu(es->s_first_data_block) +
|
|
EXT4_BLOCKS_PER_GROUP(sb) - 1);
|
|
do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb));
|
|
if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) {
|
|
ext4_msg(sb, KERN_WARNING, "groups count too large: %llu "
|
|
"(block count %llu, first data block %u, "
|
|
"blocks per group %lu)", blocks_count,
|
|
ext4_blocks_count(es),
|
|
le32_to_cpu(es->s_first_data_block),
|
|
EXT4_BLOCKS_PER_GROUP(sb));
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_groups_count = blocks_count;
|
|
sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,
|
|
(EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb)));
|
|
if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) !=
|
|
le32_to_cpu(es->s_inodes_count)) {
|
|
ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu",
|
|
le32_to_cpu(es->s_inodes_count),
|
|
((u64)sbi->s_groups_count * sbi->s_inodes_per_group));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_group_desc_init(struct super_block *sb,
|
|
struct ext4_super_block *es,
|
|
ext4_fsblk_t logical_sb_block,
|
|
ext4_group_t *first_not_zeroed)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
unsigned int db_count;
|
|
ext4_fsblk_t block;
|
|
int i;
|
|
|
|
db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
|
|
EXT4_DESC_PER_BLOCK(sb);
|
|
if (ext4_has_feature_meta_bg(sb)) {
|
|
if (le32_to_cpu(es->s_first_meta_bg) > db_count) {
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"first meta block group too large: %u "
|
|
"(group descriptor block count %u)",
|
|
le32_to_cpu(es->s_first_meta_bg), db_count);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
rcu_assign_pointer(sbi->s_group_desc,
|
|
kvmalloc_array(db_count,
|
|
sizeof(struct buffer_head *),
|
|
GFP_KERNEL));
|
|
if (sbi->s_group_desc == NULL) {
|
|
ext4_msg(sb, KERN_ERR, "not enough memory");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bgl_lock_init(sbi->s_blockgroup_lock);
|
|
|
|
/* Pre-read the descriptors into the buffer cache */
|
|
for (i = 0; i < db_count; i++) {
|
|
block = descriptor_loc(sb, logical_sb_block, i);
|
|
ext4_sb_breadahead_unmovable(sb, block);
|
|
}
|
|
|
|
for (i = 0; i < db_count; i++) {
|
|
struct buffer_head *bh;
|
|
|
|
block = descriptor_loc(sb, logical_sb_block, i);
|
|
bh = ext4_sb_bread_unmovable(sb, block);
|
|
if (IS_ERR(bh)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"can't read group descriptor %d", i);
|
|
sbi->s_gdb_count = i;
|
|
return PTR_ERR(bh);
|
|
}
|
|
rcu_read_lock();
|
|
rcu_dereference(sbi->s_group_desc)[i] = bh;
|
|
rcu_read_unlock();
|
|
}
|
|
sbi->s_gdb_count = db_count;
|
|
if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) {
|
|
ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_load_and_init_journal(struct super_block *sb,
|
|
struct ext4_super_block *es,
|
|
struct ext4_fs_context *ctx)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
int err;
|
|
|
|
err = ext4_load_journal(sb, es, ctx->journal_devnum);
|
|
if (err)
|
|
return err;
|
|
|
|
if (ext4_has_feature_64bit(sb) &&
|
|
!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
|
|
JBD2_FEATURE_INCOMPAT_64BIT)) {
|
|
ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");
|
|
goto out;
|
|
}
|
|
|
|
if (!set_journal_csum_feature_set(sb)) {
|
|
ext4_msg(sb, KERN_ERR, "Failed to set journal checksum "
|
|
"feature set");
|
|
goto out;
|
|
}
|
|
|
|
if (test_opt2(sb, JOURNAL_FAST_COMMIT) &&
|
|
!jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
|
|
JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Failed to set fast commit journal feature");
|
|
goto out;
|
|
}
|
|
|
|
/* We have now updated the journal if required, so we can
|
|
* validate the data journaling mode. */
|
|
switch (test_opt(sb, DATA_FLAGS)) {
|
|
case 0:
|
|
/* No mode set, assume a default based on the journal
|
|
* capabilities: ORDERED_DATA if the journal can
|
|
* cope, else JOURNAL_DATA
|
|
*/
|
|
if (jbd2_journal_check_available_features
|
|
(sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
|
|
set_opt(sb, ORDERED_DATA);
|
|
sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;
|
|
} else {
|
|
set_opt(sb, JOURNAL_DATA);
|
|
sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;
|
|
}
|
|
break;
|
|
|
|
case EXT4_MOUNT_ORDERED_DATA:
|
|
case EXT4_MOUNT_WRITEBACK_DATA:
|
|
if (!jbd2_journal_check_available_features
|
|
(sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
|
|
ext4_msg(sb, KERN_ERR, "Journal does not support "
|
|
"requested data journaling mode");
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA &&
|
|
test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"journal_async_commit in data=ordered mode");
|
|
goto out;
|
|
}
|
|
|
|
set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
|
|
|
|
sbi->s_journal->j_submit_inode_data_buffers =
|
|
ext4_journal_submit_inode_data_buffers;
|
|
sbi->s_journal->j_finish_inode_data_buffers =
|
|
ext4_journal_finish_inode_data_buffers;
|
|
|
|
return 0;
|
|
|
|
out:
|
|
/* flush s_sb_upd_work before destroying the journal. */
|
|
flush_work(&sbi->s_sb_upd_work);
|
|
jbd2_journal_destroy(sbi->s_journal);
|
|
sbi->s_journal = NULL;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int ext4_check_journal_data_mode(struct super_block *sb)
|
|
{
|
|
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
|
|
printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with "
|
|
"data=journal disables delayed allocation, "
|
|
"dioread_nolock, O_DIRECT and fast_commit support!\n");
|
|
/* can't mount with both data=journal and dioread_nolock. */
|
|
clear_opt(sb, DIOREAD_NOLOCK);
|
|
clear_opt2(sb, JOURNAL_FAST_COMMIT);
|
|
if (test_opt2(sb, EXPLICIT_DELALLOC)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"both data=journal and delalloc");
|
|
return -EINVAL;
|
|
}
|
|
if (test_opt(sb, DAX_ALWAYS)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"both data=journal and dax");
|
|
return -EINVAL;
|
|
}
|
|
if (ext4_has_feature_encrypt(sb)) {
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"encrypted files will use data=ordered "
|
|
"instead of data journaling mode");
|
|
}
|
|
if (test_opt(sb, DELALLOC))
|
|
clear_opt(sb, DELALLOC);
|
|
} else {
|
|
sb->s_iflags |= SB_I_CGROUPWB;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb,
|
|
int silent)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es;
|
|
ext4_fsblk_t logical_sb_block;
|
|
unsigned long offset = 0;
|
|
struct buffer_head *bh;
|
|
int ret = -EINVAL;
|
|
int blocksize;
|
|
|
|
blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE);
|
|
if (!blocksize) {
|
|
ext4_msg(sb, KERN_ERR, "unable to set blocksize");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* The ext4 superblock will not be buffer aligned for other than 1kB
|
|
* block sizes. We need to calculate the offset from buffer start.
|
|
*/
|
|
if (blocksize != EXT4_MIN_BLOCK_SIZE) {
|
|
logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;
|
|
offset = do_div(logical_sb_block, blocksize);
|
|
} else {
|
|
logical_sb_block = sbi->s_sb_block;
|
|
}
|
|
|
|
bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
|
|
if (IS_ERR(bh)) {
|
|
ext4_msg(sb, KERN_ERR, "unable to read superblock");
|
|
return PTR_ERR(bh);
|
|
}
|
|
/*
|
|
* Note: s_es must be initialized as soon as possible because
|
|
* some ext4 macro-instructions depend on its value
|
|
*/
|
|
es = (struct ext4_super_block *) (bh->b_data + offset);
|
|
sbi->s_es = es;
|
|
sb->s_magic = le16_to_cpu(es->s_magic);
|
|
if (sb->s_magic != EXT4_SUPER_MAGIC) {
|
|
if (!silent)
|
|
ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
|
|
goto out;
|
|
}
|
|
|
|
if (le32_to_cpu(es->s_log_block_size) >
|
|
(EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Invalid log block size: %u",
|
|
le32_to_cpu(es->s_log_block_size));
|
|
goto out;
|
|
}
|
|
if (le32_to_cpu(es->s_log_cluster_size) >
|
|
(EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Invalid log cluster size: %u",
|
|
le32_to_cpu(es->s_log_cluster_size));
|
|
goto out;
|
|
}
|
|
|
|
blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
|
|
|
|
/*
|
|
* If the default block size is not the same as the real block size,
|
|
* we need to reload it.
|
|
*/
|
|
if (sb->s_blocksize == blocksize) {
|
|
*lsb = logical_sb_block;
|
|
sbi->s_sbh = bh;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* bh must be released before kill_bdev(), otherwise
|
|
* it won't be freed and its page also. kill_bdev()
|
|
* is called by sb_set_blocksize().
|
|
*/
|
|
brelse(bh);
|
|
/* Validate the filesystem blocksize */
|
|
if (!sb_set_blocksize(sb, blocksize)) {
|
|
ext4_msg(sb, KERN_ERR, "bad block size %d",
|
|
blocksize);
|
|
bh = NULL;
|
|
goto out;
|
|
}
|
|
|
|
logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE;
|
|
offset = do_div(logical_sb_block, blocksize);
|
|
bh = ext4_sb_bread_unmovable(sb, logical_sb_block);
|
|
if (IS_ERR(bh)) {
|
|
ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try");
|
|
ret = PTR_ERR(bh);
|
|
bh = NULL;
|
|
goto out;
|
|
}
|
|
es = (struct ext4_super_block *)(bh->b_data + offset);
|
|
sbi->s_es = es;
|
|
if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {
|
|
ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!");
|
|
goto out;
|
|
}
|
|
*lsb = logical_sb_block;
|
|
sbi->s_sbh = bh;
|
|
return 0;
|
|
out:
|
|
brelse(bh);
|
|
return ret;
|
|
}
|
|
|
|
static void ext4_hash_info_init(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
|
|
|
|
sbi->s_def_hash_version = es->s_def_hash_version;
|
|
if (ext4_has_feature_dir_index(sb)) {
|
|
i = le32_to_cpu(es->s_flags);
|
|
if (i & EXT2_FLAGS_UNSIGNED_HASH)
|
|
sbi->s_hash_unsigned = 3;
|
|
else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
|
|
#ifdef __CHAR_UNSIGNED__
|
|
if (!sb_rdonly(sb))
|
|
es->s_flags |=
|
|
cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
|
|
sbi->s_hash_unsigned = 3;
|
|
#else
|
|
if (!sb_rdonly(sb))
|
|
es->s_flags |=
|
|
cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ext4_block_group_meta_init(struct super_block *sb, int silent)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
int has_huge_files;
|
|
|
|
has_huge_files = ext4_has_feature_huge_file(sb);
|
|
sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,
|
|
has_huge_files);
|
|
sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);
|
|
|
|
sbi->s_desc_size = le16_to_cpu(es->s_desc_size);
|
|
if (ext4_has_feature_64bit(sb)) {
|
|
if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||
|
|
sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||
|
|
!is_power_of_2(sbi->s_desc_size)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"unsupported descriptor size %lu",
|
|
sbi->s_desc_size);
|
|
return -EINVAL;
|
|
}
|
|
} else
|
|
sbi->s_desc_size = EXT4_MIN_DESC_SIZE;
|
|
|
|
sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
|
|
sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
|
|
|
|
sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);
|
|
if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {
|
|
if (!silent)
|
|
ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
|
|
return -EINVAL;
|
|
}
|
|
if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
|
|
sbi->s_inodes_per_group > sb->s_blocksize * 8) {
|
|
ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n",
|
|
sbi->s_inodes_per_group);
|
|
return -EINVAL;
|
|
}
|
|
sbi->s_itb_per_group = sbi->s_inodes_per_group /
|
|
sbi->s_inodes_per_block;
|
|
sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);
|
|
sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;
|
|
sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));
|
|
sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
|
|
{
|
|
struct ext4_super_block *es = NULL;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
ext4_fsblk_t logical_sb_block;
|
|
struct inode *root;
|
|
int needs_recovery;
|
|
int err;
|
|
ext4_group_t first_not_zeroed;
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
int silent = fc->sb_flags & SB_SILENT;
|
|
|
|
/* Set defaults for the variables that will be set during parsing */
|
|
if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO))
|
|
ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
|
|
|
|
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
|
|
sbi->s_sectors_written_start =
|
|
part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);
|
|
|
|
err = ext4_load_super(sb, &logical_sb_block, silent);
|
|
if (err)
|
|
goto out_fail;
|
|
|
|
es = sbi->s_es;
|
|
sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written);
|
|
|
|
err = ext4_init_metadata_csum(sb, es);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
ext4_set_def_opts(sb, es);
|
|
|
|
sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid));
|
|
sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid));
|
|
sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ;
|
|
sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
|
|
sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
|
|
|
|
/*
|
|
* set default s_li_wait_mult for lazyinit, for the case there is
|
|
* no mount option specified.
|
|
*/
|
|
sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;
|
|
|
|
err = ext4_inode_info_init(sb, es);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
err = parse_apply_sb_mount_options(sb, ctx);
|
|
if (err < 0)
|
|
goto failed_mount;
|
|
|
|
sbi->s_def_mount_opt = sbi->s_mount_opt;
|
|
sbi->s_def_mount_opt2 = sbi->s_mount_opt2;
|
|
|
|
err = ext4_check_opt_consistency(fc, sb);
|
|
if (err < 0)
|
|
goto failed_mount;
|
|
|
|
ext4_apply_options(fc, sb);
|
|
|
|
err = ext4_encoding_init(sb, es);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
err = ext4_check_journal_data_mode(sb);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
|
|
(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
|
|
|
|
/* i_version is always enabled now */
|
|
sb->s_flags |= SB_I_VERSION;
|
|
|
|
err = ext4_check_feature_compatibility(sb, es, silent);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
err = ext4_block_group_meta_init(sb, silent);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
ext4_hash_info_init(sb);
|
|
|
|
err = ext4_handle_clustersize(sb);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
err = ext4_check_geometry(sb, es);
|
|
if (err)
|
|
goto failed_mount;
|
|
|
|
timer_setup(&sbi->s_err_report, print_daily_error_info, 0);
|
|
spin_lock_init(&sbi->s_error_lock);
|
|
INIT_WORK(&sbi->s_sb_upd_work, update_super_work);
|
|
|
|
err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed);
|
|
if (err)
|
|
goto failed_mount3;
|
|
|
|
err = ext4_es_register_shrinker(sbi);
|
|
if (err)
|
|
goto failed_mount3;
|
|
|
|
sbi->s_stripe = ext4_get_stripe_size(sbi);
|
|
/*
|
|
* It's hard to get stripe aligned blocks if stripe is not aligned with
|
|
* cluster, just disable stripe and alert user to simpfy code and avoid
|
|
* stripe aligned allocation which will rarely successes.
|
|
*/
|
|
if (sbi->s_stripe > 0 && sbi->s_cluster_ratio > 1 &&
|
|
sbi->s_stripe % sbi->s_cluster_ratio != 0) {
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"stripe (%lu) is not aligned with cluster size (%u), "
|
|
"stripe is disabled",
|
|
sbi->s_stripe, sbi->s_cluster_ratio);
|
|
sbi->s_stripe = 0;
|
|
}
|
|
sbi->s_extent_max_zeroout_kb = 32;
|
|
|
|
/*
|
|
* set up enough so that it can read an inode
|
|
*/
|
|
sb->s_op = &ext4_sops;
|
|
sb->s_export_op = &ext4_export_ops;
|
|
sb->s_xattr = ext4_xattr_handlers;
|
|
#ifdef CONFIG_FS_ENCRYPTION
|
|
sb->s_cop = &ext4_cryptops;
|
|
#endif
|
|
#ifdef CONFIG_FS_VERITY
|
|
sb->s_vop = &ext4_verityops;
|
|
#endif
|
|
#ifdef CONFIG_QUOTA
|
|
sb->dq_op = &ext4_quota_operations;
|
|
if (ext4_has_feature_quota(sb))
|
|
sb->s_qcop = &dquot_quotactl_sysfile_ops;
|
|
else
|
|
sb->s_qcop = &ext4_qctl_operations;
|
|
sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
|
|
#endif
|
|
super_set_uuid(sb, es->s_uuid, sizeof(es->s_uuid));
|
|
super_set_sysfs_name_bdev(sb);
|
|
|
|
INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
|
|
mutex_init(&sbi->s_orphan_lock);
|
|
|
|
ext4_fast_commit_init(sb);
|
|
|
|
sb->s_root = NULL;
|
|
|
|
needs_recovery = (es->s_last_orphan != 0 ||
|
|
ext4_has_feature_orphan_present(sb) ||
|
|
ext4_has_feature_journal_needs_recovery(sb));
|
|
|
|
if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) {
|
|
err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block));
|
|
if (err)
|
|
goto failed_mount3a;
|
|
}
|
|
|
|
err = -EINVAL;
|
|
/*
|
|
* The first inode we look at is the journal inode. Don't try
|
|
* root first: it may be modified in the journal!
|
|
*/
|
|
if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) {
|
|
err = ext4_load_and_init_journal(sb, es, ctx);
|
|
if (err)
|
|
goto failed_mount3a;
|
|
} else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) &&
|
|
ext4_has_feature_journal_needs_recovery(sb)) {
|
|
ext4_msg(sb, KERN_ERR, "required journal recovery "
|
|
"suppressed and not mounted read-only");
|
|
goto failed_mount3a;
|
|
} else {
|
|
/* Nojournal mode, all journal mount options are illegal */
|
|
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"journal_async_commit, fs mounted w/o journal");
|
|
goto failed_mount3a;
|
|
}
|
|
|
|
if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"journal_checksum, fs mounted w/o journal");
|
|
goto failed_mount3a;
|
|
}
|
|
if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"commit=%lu, fs mounted w/o journal",
|
|
sbi->s_commit_interval / HZ);
|
|
goto failed_mount3a;
|
|
}
|
|
if (EXT4_MOUNT_DATA_FLAGS &
|
|
(sbi->s_mount_opt ^ sbi->s_def_mount_opt)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"data=, fs mounted w/o journal");
|
|
goto failed_mount3a;
|
|
}
|
|
sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;
|
|
clear_opt(sb, JOURNAL_CHECKSUM);
|
|
clear_opt(sb, DATA_FLAGS);
|
|
clear_opt2(sb, JOURNAL_FAST_COMMIT);
|
|
sbi->s_journal = NULL;
|
|
needs_recovery = 0;
|
|
}
|
|
|
|
if (!test_opt(sb, NO_MBCACHE)) {
|
|
sbi->s_ea_block_cache = ext4_xattr_create_cache();
|
|
if (!sbi->s_ea_block_cache) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Failed to create ea_block_cache");
|
|
err = -EINVAL;
|
|
goto failed_mount_wq;
|
|
}
|
|
|
|
if (ext4_has_feature_ea_inode(sb)) {
|
|
sbi->s_ea_inode_cache = ext4_xattr_create_cache();
|
|
if (!sbi->s_ea_inode_cache) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Failed to create ea_inode_cache");
|
|
err = -EINVAL;
|
|
goto failed_mount_wq;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the # of file system overhead blocks from the
|
|
* superblock if present.
|
|
*/
|
|
sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);
|
|
/* ignore the precalculated value if it is ridiculous */
|
|
if (sbi->s_overhead > ext4_blocks_count(es))
|
|
sbi->s_overhead = 0;
|
|
/*
|
|
* If the bigalloc feature is not enabled recalculating the
|
|
* overhead doesn't take long, so we might as well just redo
|
|
* it to make sure we are using the correct value.
|
|
*/
|
|
if (!ext4_has_feature_bigalloc(sb))
|
|
sbi->s_overhead = 0;
|
|
if (sbi->s_overhead == 0) {
|
|
err = ext4_calculate_overhead(sb);
|
|
if (err)
|
|
goto failed_mount_wq;
|
|
}
|
|
|
|
/*
|
|
* The maximum number of concurrent works can be high and
|
|
* concurrency isn't really necessary. Limit it to 1.
|
|
*/
|
|
EXT4_SB(sb)->rsv_conversion_wq =
|
|
alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
|
|
if (!EXT4_SB(sb)->rsv_conversion_wq) {
|
|
printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");
|
|
err = -ENOMEM;
|
|
goto failed_mount4;
|
|
}
|
|
|
|
/*
|
|
* The jbd2_journal_load will have done any necessary log recovery,
|
|
* so we can safely mount the rest of the filesystem now.
|
|
*/
|
|
|
|
root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL);
|
|
if (IS_ERR(root)) {
|
|
ext4_msg(sb, KERN_ERR, "get root inode failed");
|
|
err = PTR_ERR(root);
|
|
root = NULL;
|
|
goto failed_mount4;
|
|
}
|
|
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
|
|
ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck");
|
|
iput(root);
|
|
err = -EFSCORRUPTED;
|
|
goto failed_mount4;
|
|
}
|
|
|
|
generic_set_sb_d_ops(sb);
|
|
sb->s_root = d_make_root(root);
|
|
if (!sb->s_root) {
|
|
ext4_msg(sb, KERN_ERR, "get root dentry failed");
|
|
err = -ENOMEM;
|
|
goto failed_mount4;
|
|
}
|
|
|
|
err = ext4_setup_super(sb, es, sb_rdonly(sb));
|
|
if (err == -EROFS) {
|
|
sb->s_flags |= SB_RDONLY;
|
|
} else if (err)
|
|
goto failed_mount4a;
|
|
|
|
ext4_set_resv_clusters(sb);
|
|
|
|
if (test_opt(sb, BLOCK_VALIDITY)) {
|
|
err = ext4_setup_system_zone(sb);
|
|
if (err) {
|
|
ext4_msg(sb, KERN_ERR, "failed to initialize system "
|
|
"zone (%d)", err);
|
|
goto failed_mount4a;
|
|
}
|
|
}
|
|
ext4_fc_replay_cleanup(sb);
|
|
|
|
ext4_ext_init(sb);
|
|
|
|
/*
|
|
* Enable optimize_scan if number of groups is > threshold. This can be
|
|
* turned off by passing "mb_optimize_scan=0". This can also be
|
|
* turned on forcefully by passing "mb_optimize_scan=1".
|
|
*/
|
|
if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) {
|
|
if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD)
|
|
set_opt2(sb, MB_OPTIMIZE_SCAN);
|
|
else
|
|
clear_opt2(sb, MB_OPTIMIZE_SCAN);
|
|
}
|
|
|
|
err = ext4_mb_init(sb);
|
|
if (err) {
|
|
ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
|
|
err);
|
|
goto failed_mount5;
|
|
}
|
|
|
|
/*
|
|
* We can only set up the journal commit callback once
|
|
* mballoc is initialized
|
|
*/
|
|
if (sbi->s_journal)
|
|
sbi->s_journal->j_commit_callback =
|
|
ext4_journal_commit_callback;
|
|
|
|
err = ext4_percpu_param_init(sbi);
|
|
if (err)
|
|
goto failed_mount6;
|
|
|
|
if (ext4_has_feature_flex_bg(sb))
|
|
if (!ext4_fill_flex_info(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"unable to initialize "
|
|
"flex_bg meta info!");
|
|
err = -ENOMEM;
|
|
goto failed_mount6;
|
|
}
|
|
|
|
err = ext4_register_li_request(sb, first_not_zeroed);
|
|
if (err)
|
|
goto failed_mount6;
|
|
|
|
err = ext4_init_orphan_info(sb);
|
|
if (err)
|
|
goto failed_mount7;
|
|
#ifdef CONFIG_QUOTA
|
|
/* Enable quota usage during mount. */
|
|
if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) {
|
|
err = ext4_enable_quotas(sb);
|
|
if (err)
|
|
goto failed_mount8;
|
|
}
|
|
#endif /* CONFIG_QUOTA */
|
|
|
|
/*
|
|
* Save the original bdev mapping's wb_err value which could be
|
|
* used to detect the metadata async write error.
|
|
*/
|
|
spin_lock_init(&sbi->s_bdev_wb_lock);
|
|
errseq_check_and_advance(&sb->s_bdev->bd_mapping->wb_err,
|
|
&sbi->s_bdev_wb_err);
|
|
EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
|
|
ext4_orphan_cleanup(sb, es);
|
|
EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
|
|
/*
|
|
* Update the checksum after updating free space/inode counters and
|
|
* ext4_orphan_cleanup. Otherwise the superblock can have an incorrect
|
|
* checksum in the buffer cache until it is written out and
|
|
* e2fsprogs programs trying to open a file system immediately
|
|
* after it is mounted can fail.
|
|
*/
|
|
ext4_superblock_csum_set(sb);
|
|
if (needs_recovery) {
|
|
ext4_msg(sb, KERN_INFO, "recovery complete");
|
|
err = ext4_mark_recovery_complete(sb, es);
|
|
if (err)
|
|
goto failed_mount9;
|
|
}
|
|
|
|
if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev))
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"mounting with \"discard\" option, but the device does not support discard");
|
|
|
|
if (es->s_error_count)
|
|
mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */
|
|
|
|
/* Enable message ratelimiting. Default is 10 messages per 5 secs. */
|
|
ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);
|
|
ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);
|
|
ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);
|
|
atomic_set(&sbi->s_warning_count, 0);
|
|
atomic_set(&sbi->s_msg_count, 0);
|
|
|
|
/* Register sysfs after all initializations are complete. */
|
|
err = ext4_register_sysfs(sb);
|
|
if (err)
|
|
goto failed_mount9;
|
|
|
|
return 0;
|
|
|
|
failed_mount9:
|
|
ext4_quotas_off(sb, EXT4_MAXQUOTAS);
|
|
failed_mount8: __maybe_unused
|
|
ext4_release_orphan_info(sb);
|
|
failed_mount7:
|
|
ext4_unregister_li_request(sb);
|
|
failed_mount6:
|
|
ext4_mb_release(sb);
|
|
ext4_flex_groups_free(sbi);
|
|
ext4_percpu_param_destroy(sbi);
|
|
failed_mount5:
|
|
ext4_ext_release(sb);
|
|
ext4_release_system_zone(sb);
|
|
failed_mount4a:
|
|
dput(sb->s_root);
|
|
sb->s_root = NULL;
|
|
failed_mount4:
|
|
ext4_msg(sb, KERN_ERR, "mount failed");
|
|
if (EXT4_SB(sb)->rsv_conversion_wq)
|
|
destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
|
|
failed_mount_wq:
|
|
ext4_xattr_destroy_cache(sbi->s_ea_inode_cache);
|
|
sbi->s_ea_inode_cache = NULL;
|
|
|
|
ext4_xattr_destroy_cache(sbi->s_ea_block_cache);
|
|
sbi->s_ea_block_cache = NULL;
|
|
|
|
if (sbi->s_journal) {
|
|
/* flush s_sb_upd_work before journal destroy. */
|
|
flush_work(&sbi->s_sb_upd_work);
|
|
jbd2_journal_destroy(sbi->s_journal);
|
|
sbi->s_journal = NULL;
|
|
}
|
|
failed_mount3a:
|
|
ext4_es_unregister_shrinker(sbi);
|
|
failed_mount3:
|
|
/* flush s_sb_upd_work before sbi destroy */
|
|
flush_work(&sbi->s_sb_upd_work);
|
|
del_timer_sync(&sbi->s_err_report);
|
|
ext4_stop_mmpd(sbi);
|
|
ext4_group_desc_free(sbi);
|
|
failed_mount:
|
|
if (sbi->s_chksum_driver)
|
|
crypto_free_shash(sbi->s_chksum_driver);
|
|
|
|
#if IS_ENABLED(CONFIG_UNICODE)
|
|
utf8_unload(sb->s_encoding);
|
|
#endif
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
kfree(get_qf_name(sb, sbi, i));
|
|
#endif
|
|
fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);
|
|
brelse(sbi->s_sbh);
|
|
if (sbi->s_journal_bdev_file) {
|
|
invalidate_bdev(file_bdev(sbi->s_journal_bdev_file));
|
|
bdev_fput(sbi->s_journal_bdev_file);
|
|
}
|
|
out_fail:
|
|
invalidate_bdev(sb->s_bdev);
|
|
sb->s_fs_info = NULL;
|
|
return err;
|
|
}
|
|
|
|
static int ext4_fill_super(struct super_block *sb, struct fs_context *fc)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_sb_info *sbi;
|
|
const char *descr;
|
|
int ret;
|
|
|
|
sbi = ext4_alloc_sbi(sb);
|
|
if (!sbi)
|
|
return -ENOMEM;
|
|
|
|
fc->s_fs_info = sbi;
|
|
|
|
/* Cleanup superblock name */
|
|
strreplace(sb->s_id, '/', '!');
|
|
|
|
sbi->s_sb_block = 1; /* Default super block location */
|
|
if (ctx->spec & EXT4_SPEC_s_sb_block)
|
|
sbi->s_sb_block = ctx->s_sb_block;
|
|
|
|
ret = __ext4_fill_super(fc, sb);
|
|
if (ret < 0)
|
|
goto free_sbi;
|
|
|
|
if (sbi->s_journal) {
|
|
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
|
|
descr = " journalled data mode";
|
|
else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
|
|
descr = " ordered data mode";
|
|
else
|
|
descr = " writeback data mode";
|
|
} else
|
|
descr = "out journal";
|
|
|
|
if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))
|
|
ext4_msg(sb, KERN_INFO, "mounted filesystem %pU %s with%s. "
|
|
"Quota mode: %s.", &sb->s_uuid,
|
|
sb_rdonly(sb) ? "ro" : "r/w", descr,
|
|
ext4_quota_mode(sb));
|
|
|
|
/* Update the s_overhead_clusters if necessary */
|
|
ext4_update_overhead(sb, false);
|
|
return 0;
|
|
|
|
free_sbi:
|
|
ext4_free_sbi(sbi);
|
|
fc->s_fs_info = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static int ext4_get_tree(struct fs_context *fc)
|
|
{
|
|
return get_tree_bdev(fc, ext4_fill_super);
|
|
}
|
|
|
|
/*
|
|
* Setup any per-fs journal parameters now. We'll do this both on
|
|
* initial mount, once the journal has been initialised but before we've
|
|
* done any recovery; and again on any subsequent remount.
|
|
*/
|
|
static void ext4_init_journal_params(struct super_block *sb, journal_t *journal)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
journal->j_commit_interval = sbi->s_commit_interval;
|
|
journal->j_min_batch_time = sbi->s_min_batch_time;
|
|
journal->j_max_batch_time = sbi->s_max_batch_time;
|
|
ext4_fc_init(sb, journal);
|
|
|
|
write_lock(&journal->j_state_lock);
|
|
if (test_opt(sb, BARRIER))
|
|
journal->j_flags |= JBD2_BARRIER;
|
|
else
|
|
journal->j_flags &= ~JBD2_BARRIER;
|
|
if (test_opt(sb, DATA_ERR_ABORT))
|
|
journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR;
|
|
else
|
|
journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR;
|
|
/*
|
|
* Always enable journal cycle record option, letting the journal
|
|
* records log transactions continuously between each mount.
|
|
*/
|
|
journal->j_flags |= JBD2_CYCLE_RECORD;
|
|
write_unlock(&journal->j_state_lock);
|
|
}
|
|
|
|
static struct inode *ext4_get_journal_inode(struct super_block *sb,
|
|
unsigned int journal_inum)
|
|
{
|
|
struct inode *journal_inode;
|
|
|
|
/*
|
|
* Test for the existence of a valid inode on disk. Bad things
|
|
* happen if we iget() an unused inode, as the subsequent iput()
|
|
* will try to delete it.
|
|
*/
|
|
journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL);
|
|
if (IS_ERR(journal_inode)) {
|
|
ext4_msg(sb, KERN_ERR, "no journal found");
|
|
return ERR_CAST(journal_inode);
|
|
}
|
|
if (!journal_inode->i_nlink) {
|
|
make_bad_inode(journal_inode);
|
|
iput(journal_inode);
|
|
ext4_msg(sb, KERN_ERR, "journal inode is deleted");
|
|
return ERR_PTR(-EFSCORRUPTED);
|
|
}
|
|
if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) {
|
|
ext4_msg(sb, KERN_ERR, "invalid journal inode");
|
|
iput(journal_inode);
|
|
return ERR_PTR(-EFSCORRUPTED);
|
|
}
|
|
|
|
ext4_debug("Journal inode found at %p: %lld bytes\n",
|
|
journal_inode, journal_inode->i_size);
|
|
return journal_inode;
|
|
}
|
|
|
|
static int ext4_journal_bmap(journal_t *journal, sector_t *block)
|
|
{
|
|
struct ext4_map_blocks map;
|
|
int ret;
|
|
|
|
if (journal->j_inode == NULL)
|
|
return 0;
|
|
|
|
map.m_lblk = *block;
|
|
map.m_len = 1;
|
|
ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0);
|
|
if (ret <= 0) {
|
|
ext4_msg(journal->j_inode->i_sb, KERN_CRIT,
|
|
"journal bmap failed: block %llu ret %d\n",
|
|
*block, ret);
|
|
jbd2_journal_abort(journal, ret ? ret : -EIO);
|
|
return ret;
|
|
}
|
|
*block = map.m_pblk;
|
|
return 0;
|
|
}
|
|
|
|
static journal_t *ext4_open_inode_journal(struct super_block *sb,
|
|
unsigned int journal_inum)
|
|
{
|
|
struct inode *journal_inode;
|
|
journal_t *journal;
|
|
|
|
journal_inode = ext4_get_journal_inode(sb, journal_inum);
|
|
if (IS_ERR(journal_inode))
|
|
return ERR_CAST(journal_inode);
|
|
|
|
journal = jbd2_journal_init_inode(journal_inode);
|
|
if (IS_ERR(journal)) {
|
|
ext4_msg(sb, KERN_ERR, "Could not load journal inode");
|
|
iput(journal_inode);
|
|
return ERR_CAST(journal);
|
|
}
|
|
journal->j_private = sb;
|
|
journal->j_bmap = ext4_journal_bmap;
|
|
ext4_init_journal_params(sb, journal);
|
|
return journal;
|
|
}
|
|
|
|
static struct file *ext4_get_journal_blkdev(struct super_block *sb,
|
|
dev_t j_dev, ext4_fsblk_t *j_start,
|
|
ext4_fsblk_t *j_len)
|
|
{
|
|
struct buffer_head *bh;
|
|
struct block_device *bdev;
|
|
struct file *bdev_file;
|
|
int hblock, blocksize;
|
|
ext4_fsblk_t sb_block;
|
|
unsigned long offset;
|
|
struct ext4_super_block *es;
|
|
int errno;
|
|
|
|
bdev_file = bdev_file_open_by_dev(j_dev,
|
|
BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
|
|
sb, &fs_holder_ops);
|
|
if (IS_ERR(bdev_file)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"failed to open journal device unknown-block(%u,%u) %ld",
|
|
MAJOR(j_dev), MINOR(j_dev), PTR_ERR(bdev_file));
|
|
return bdev_file;
|
|
}
|
|
|
|
bdev = file_bdev(bdev_file);
|
|
blocksize = sb->s_blocksize;
|
|
hblock = bdev_logical_block_size(bdev);
|
|
if (blocksize < hblock) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"blocksize too small for journal device");
|
|
errno = -EINVAL;
|
|
goto out_bdev;
|
|
}
|
|
|
|
sb_block = EXT4_MIN_BLOCK_SIZE / blocksize;
|
|
offset = EXT4_MIN_BLOCK_SIZE % blocksize;
|
|
set_blocksize(bdev_file, blocksize);
|
|
bh = __bread(bdev, sb_block, blocksize);
|
|
if (!bh) {
|
|
ext4_msg(sb, KERN_ERR, "couldn't read superblock of "
|
|
"external journal");
|
|
errno = -EINVAL;
|
|
goto out_bdev;
|
|
}
|
|
|
|
es = (struct ext4_super_block *) (bh->b_data + offset);
|
|
if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) ||
|
|
!(le32_to_cpu(es->s_feature_incompat) &
|
|
EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) {
|
|
ext4_msg(sb, KERN_ERR, "external journal has bad superblock");
|
|
errno = -EFSCORRUPTED;
|
|
goto out_bh;
|
|
}
|
|
|
|
if ((le32_to_cpu(es->s_feature_ro_compat) &
|
|
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
|
|
es->s_checksum != ext4_superblock_csum(sb, es)) {
|
|
ext4_msg(sb, KERN_ERR, "external journal has corrupt superblock");
|
|
errno = -EFSCORRUPTED;
|
|
goto out_bh;
|
|
}
|
|
|
|
if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
|
|
ext4_msg(sb, KERN_ERR, "journal UUID does not match");
|
|
errno = -EFSCORRUPTED;
|
|
goto out_bh;
|
|
}
|
|
|
|
*j_start = sb_block + 1;
|
|
*j_len = ext4_blocks_count(es);
|
|
brelse(bh);
|
|
return bdev_file;
|
|
|
|
out_bh:
|
|
brelse(bh);
|
|
out_bdev:
|
|
bdev_fput(bdev_file);
|
|
return ERR_PTR(errno);
|
|
}
|
|
|
|
static journal_t *ext4_open_dev_journal(struct super_block *sb,
|
|
dev_t j_dev)
|
|
{
|
|
journal_t *journal;
|
|
ext4_fsblk_t j_start;
|
|
ext4_fsblk_t j_len;
|
|
struct file *bdev_file;
|
|
int errno = 0;
|
|
|
|
bdev_file = ext4_get_journal_blkdev(sb, j_dev, &j_start, &j_len);
|
|
if (IS_ERR(bdev_file))
|
|
return ERR_CAST(bdev_file);
|
|
|
|
journal = jbd2_journal_init_dev(file_bdev(bdev_file), sb->s_bdev, j_start,
|
|
j_len, sb->s_blocksize);
|
|
if (IS_ERR(journal)) {
|
|
ext4_msg(sb, KERN_ERR, "failed to create device journal");
|
|
errno = PTR_ERR(journal);
|
|
goto out_bdev;
|
|
}
|
|
if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
|
|
ext4_msg(sb, KERN_ERR, "External journal has more than one "
|
|
"user (unsupported) - %d",
|
|
be32_to_cpu(journal->j_superblock->s_nr_users));
|
|
errno = -EINVAL;
|
|
goto out_journal;
|
|
}
|
|
journal->j_private = sb;
|
|
EXT4_SB(sb)->s_journal_bdev_file = bdev_file;
|
|
ext4_init_journal_params(sb, journal);
|
|
return journal;
|
|
|
|
out_journal:
|
|
jbd2_journal_destroy(journal);
|
|
out_bdev:
|
|
bdev_fput(bdev_file);
|
|
return ERR_PTR(errno);
|
|
}
|
|
|
|
static int ext4_load_journal(struct super_block *sb,
|
|
struct ext4_super_block *es,
|
|
unsigned long journal_devnum)
|
|
{
|
|
journal_t *journal;
|
|
unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
|
|
dev_t journal_dev;
|
|
int err = 0;
|
|
int really_read_only;
|
|
int journal_dev_ro;
|
|
|
|
if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
|
|
return -EFSCORRUPTED;
|
|
|
|
if (journal_devnum &&
|
|
journal_devnum != le32_to_cpu(es->s_journal_dev)) {
|
|
ext4_msg(sb, KERN_INFO, "external journal device major/minor "
|
|
"numbers have changed");
|
|
journal_dev = new_decode_dev(journal_devnum);
|
|
} else
|
|
journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
|
|
|
|
if (journal_inum && journal_dev) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"filesystem has both journal inode and journal device!");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (journal_inum) {
|
|
journal = ext4_open_inode_journal(sb, journal_inum);
|
|
if (IS_ERR(journal))
|
|
return PTR_ERR(journal);
|
|
} else {
|
|
journal = ext4_open_dev_journal(sb, journal_dev);
|
|
if (IS_ERR(journal))
|
|
return PTR_ERR(journal);
|
|
}
|
|
|
|
journal_dev_ro = bdev_read_only(journal->j_dev);
|
|
really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;
|
|
|
|
if (journal_dev_ro && !sb_rdonly(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"journal device read-only, try mounting with '-o ro'");
|
|
err = -EROFS;
|
|
goto err_out;
|
|
}
|
|
|
|
/*
|
|
* Are we loading a blank journal or performing recovery after a
|
|
* crash? For recovery, we need to check in advance whether we
|
|
* can get read-write access to the device.
|
|
*/
|
|
if (ext4_has_feature_journal_needs_recovery(sb)) {
|
|
if (sb_rdonly(sb)) {
|
|
ext4_msg(sb, KERN_INFO, "INFO: recovery "
|
|
"required on readonly filesystem");
|
|
if (really_read_only) {
|
|
ext4_msg(sb, KERN_ERR, "write access "
|
|
"unavailable, cannot proceed "
|
|
"(try mounting with noload)");
|
|
err = -EROFS;
|
|
goto err_out;
|
|
}
|
|
ext4_msg(sb, KERN_INFO, "write access will "
|
|
"be enabled during recovery");
|
|
}
|
|
}
|
|
|
|
if (!(journal->j_flags & JBD2_BARRIER))
|
|
ext4_msg(sb, KERN_INFO, "barriers disabled");
|
|
|
|
if (!ext4_has_feature_journal_needs_recovery(sb))
|
|
err = jbd2_journal_wipe(journal, !really_read_only);
|
|
if (!err) {
|
|
char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL);
|
|
__le16 orig_state;
|
|
bool changed = false;
|
|
|
|
if (save)
|
|
memcpy(save, ((char *) es) +
|
|
EXT4_S_ERR_START, EXT4_S_ERR_LEN);
|
|
err = jbd2_journal_load(journal);
|
|
if (save && memcmp(((char *) es) + EXT4_S_ERR_START,
|
|
save, EXT4_S_ERR_LEN)) {
|
|
memcpy(((char *) es) + EXT4_S_ERR_START,
|
|
save, EXT4_S_ERR_LEN);
|
|
changed = true;
|
|
}
|
|
kfree(save);
|
|
orig_state = es->s_state;
|
|
es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state &
|
|
EXT4_ERROR_FS);
|
|
if (orig_state != es->s_state)
|
|
changed = true;
|
|
/* Write out restored error information to the superblock */
|
|
if (changed && !really_read_only) {
|
|
int err2;
|
|
err2 = ext4_commit_super(sb);
|
|
err = err ? : err2;
|
|
}
|
|
}
|
|
|
|
if (err) {
|
|
ext4_msg(sb, KERN_ERR, "error loading journal");
|
|
goto err_out;
|
|
}
|
|
|
|
EXT4_SB(sb)->s_journal = journal;
|
|
err = ext4_clear_journal_err(sb, es);
|
|
if (err) {
|
|
EXT4_SB(sb)->s_journal = NULL;
|
|
jbd2_journal_destroy(journal);
|
|
return err;
|
|
}
|
|
|
|
if (!really_read_only && journal_devnum &&
|
|
journal_devnum != le32_to_cpu(es->s_journal_dev)) {
|
|
es->s_journal_dev = cpu_to_le32(journal_devnum);
|
|
ext4_commit_super(sb);
|
|
}
|
|
if (!really_read_only && journal_inum &&
|
|
journal_inum != le32_to_cpu(es->s_journal_inum)) {
|
|
es->s_journal_inum = cpu_to_le32(journal_inum);
|
|
ext4_commit_super(sb);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
jbd2_journal_destroy(journal);
|
|
return err;
|
|
}
|
|
|
|
/* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */
|
|
static void ext4_update_super(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
struct buffer_head *sbh = sbi->s_sbh;
|
|
|
|
lock_buffer(sbh);
|
|
/*
|
|
* If the file system is mounted read-only, don't update the
|
|
* superblock write time. This avoids updating the superblock
|
|
* write time when we are mounting the root file system
|
|
* read/only but we need to replay the journal; at that point,
|
|
* for people who are east of GMT and who make their clock
|
|
* tick in localtime for Windows bug-for-bug compatibility,
|
|
* the clock is set in the future, and this will cause e2fsck
|
|
* to complain and force a full file system check.
|
|
*/
|
|
if (!sb_rdonly(sb))
|
|
ext4_update_tstamp(es, s_wtime);
|
|
es->s_kbytes_written =
|
|
cpu_to_le64(sbi->s_kbytes_written +
|
|
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
|
|
sbi->s_sectors_written_start) >> 1));
|
|
if (percpu_counter_initialized(&sbi->s_freeclusters_counter))
|
|
ext4_free_blocks_count_set(es,
|
|
EXT4_C2B(sbi, percpu_counter_sum_positive(
|
|
&sbi->s_freeclusters_counter)));
|
|
if (percpu_counter_initialized(&sbi->s_freeinodes_counter))
|
|
es->s_free_inodes_count =
|
|
cpu_to_le32(percpu_counter_sum_positive(
|
|
&sbi->s_freeinodes_counter));
|
|
/* Copy error information to the on-disk superblock */
|
|
spin_lock(&sbi->s_error_lock);
|
|
if (sbi->s_add_error_count > 0) {
|
|
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
|
|
if (!es->s_first_error_time && !es->s_first_error_time_hi) {
|
|
__ext4_update_tstamp(&es->s_first_error_time,
|
|
&es->s_first_error_time_hi,
|
|
sbi->s_first_error_time);
|
|
strtomem_pad(es->s_first_error_func,
|
|
sbi->s_first_error_func, 0);
|
|
es->s_first_error_line =
|
|
cpu_to_le32(sbi->s_first_error_line);
|
|
es->s_first_error_ino =
|
|
cpu_to_le32(sbi->s_first_error_ino);
|
|
es->s_first_error_block =
|
|
cpu_to_le64(sbi->s_first_error_block);
|
|
es->s_first_error_errcode =
|
|
ext4_errno_to_code(sbi->s_first_error_code);
|
|
}
|
|
__ext4_update_tstamp(&es->s_last_error_time,
|
|
&es->s_last_error_time_hi,
|
|
sbi->s_last_error_time);
|
|
strtomem_pad(es->s_last_error_func, sbi->s_last_error_func, 0);
|
|
es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line);
|
|
es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino);
|
|
es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block);
|
|
es->s_last_error_errcode =
|
|
ext4_errno_to_code(sbi->s_last_error_code);
|
|
/*
|
|
* Start the daily error reporting function if it hasn't been
|
|
* started already
|
|
*/
|
|
if (!es->s_error_count)
|
|
mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ);
|
|
le32_add_cpu(&es->s_error_count, sbi->s_add_error_count);
|
|
sbi->s_add_error_count = 0;
|
|
}
|
|
spin_unlock(&sbi->s_error_lock);
|
|
|
|
ext4_superblock_csum_set(sb);
|
|
unlock_buffer(sbh);
|
|
}
|
|
|
|
static int ext4_commit_super(struct super_block *sb)
|
|
{
|
|
struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
|
|
|
|
if (!sbh)
|
|
return -EINVAL;
|
|
|
|
ext4_update_super(sb);
|
|
|
|
lock_buffer(sbh);
|
|
/* Buffer got discarded which means block device got invalidated */
|
|
if (!buffer_mapped(sbh)) {
|
|
unlock_buffer(sbh);
|
|
return -EIO;
|
|
}
|
|
|
|
if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) {
|
|
/*
|
|
* Oh, dear. A previous attempt to write the
|
|
* superblock failed. This could happen because the
|
|
* USB device was yanked out. Or it could happen to
|
|
* be a transient write error and maybe the block will
|
|
* be remapped. Nothing we can do but to retry the
|
|
* write and hope for the best.
|
|
*/
|
|
ext4_msg(sb, KERN_ERR, "previous I/O error to "
|
|
"superblock detected");
|
|
clear_buffer_write_io_error(sbh);
|
|
set_buffer_uptodate(sbh);
|
|
}
|
|
get_bh(sbh);
|
|
/* Clear potential dirty bit if it was journalled update */
|
|
clear_buffer_dirty(sbh);
|
|
sbh->b_end_io = end_buffer_write_sync;
|
|
submit_bh(REQ_OP_WRITE | REQ_SYNC |
|
|
(test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh);
|
|
wait_on_buffer(sbh);
|
|
if (buffer_write_io_error(sbh)) {
|
|
ext4_msg(sb, KERN_ERR, "I/O error while writing "
|
|
"superblock");
|
|
clear_buffer_write_io_error(sbh);
|
|
set_buffer_uptodate(sbh);
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Have we just finished recovery? If so, and if we are mounting (or
|
|
* remounting) the filesystem readonly, then we will end up with a
|
|
* consistent fs on disk. Record that fact.
|
|
*/
|
|
static int ext4_mark_recovery_complete(struct super_block *sb,
|
|
struct ext4_super_block *es)
|
|
{
|
|
int err;
|
|
journal_t *journal = EXT4_SB(sb)->s_journal;
|
|
|
|
if (!ext4_has_feature_journal(sb)) {
|
|
if (journal != NULL) {
|
|
ext4_error(sb, "Journal got removed while the fs was "
|
|
"mounted!");
|
|
return -EFSCORRUPTED;
|
|
}
|
|
return 0;
|
|
}
|
|
jbd2_journal_lock_updates(journal);
|
|
err = jbd2_journal_flush(journal, 0);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) ||
|
|
ext4_has_feature_orphan_present(sb))) {
|
|
if (!ext4_orphan_file_empty(sb)) {
|
|
ext4_error(sb, "Orphan file not empty on read-only fs.");
|
|
err = -EFSCORRUPTED;
|
|
goto out;
|
|
}
|
|
ext4_clear_feature_journal_needs_recovery(sb);
|
|
ext4_clear_feature_orphan_present(sb);
|
|
ext4_commit_super(sb);
|
|
}
|
|
out:
|
|
jbd2_journal_unlock_updates(journal);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* If we are mounting (or read-write remounting) a filesystem whose journal
|
|
* has recorded an error from a previous lifetime, move that error to the
|
|
* main filesystem now.
|
|
*/
|
|
static int ext4_clear_journal_err(struct super_block *sb,
|
|
struct ext4_super_block *es)
|
|
{
|
|
journal_t *journal;
|
|
int j_errno;
|
|
const char *errstr;
|
|
|
|
if (!ext4_has_feature_journal(sb)) {
|
|
ext4_error(sb, "Journal got removed while the fs was mounted!");
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
journal = EXT4_SB(sb)->s_journal;
|
|
|
|
/*
|
|
* Now check for any error status which may have been recorded in the
|
|
* journal by a prior ext4_error() or ext4_abort()
|
|
*/
|
|
|
|
j_errno = jbd2_journal_errno(journal);
|
|
if (j_errno) {
|
|
char nbuf[16];
|
|
|
|
errstr = ext4_decode_error(sb, j_errno, nbuf);
|
|
ext4_warning(sb, "Filesystem error recorded "
|
|
"from previous mount: %s", errstr);
|
|
|
|
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
|
|
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
|
|
j_errno = ext4_commit_super(sb);
|
|
if (j_errno)
|
|
return j_errno;
|
|
ext4_warning(sb, "Marked fs in need of filesystem check.");
|
|
|
|
jbd2_journal_clear_err(journal);
|
|
jbd2_journal_update_sb_errno(journal);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Force the running and committing transactions to commit,
|
|
* and wait on the commit.
|
|
*/
|
|
int ext4_force_commit(struct super_block *sb)
|
|
{
|
|
return ext4_journal_force_commit(EXT4_SB(sb)->s_journal);
|
|
}
|
|
|
|
static int ext4_sync_fs(struct super_block *sb, int wait)
|
|
{
|
|
int ret = 0;
|
|
tid_t target;
|
|
bool needs_barrier = false;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
|
|
if (unlikely(ext4_forced_shutdown(sb)))
|
|
return 0;
|
|
|
|
trace_ext4_sync_fs(sb, wait);
|
|
flush_workqueue(sbi->rsv_conversion_wq);
|
|
/*
|
|
* Writeback quota in non-journalled quota case - journalled quota has
|
|
* no dirty dquots
|
|
*/
|
|
dquot_writeback_dquots(sb, -1);
|
|
/*
|
|
* Data writeback is possible w/o journal transaction, so barrier must
|
|
* being sent at the end of the function. But we can skip it if
|
|
* transaction_commit will do it for us.
|
|
*/
|
|
if (sbi->s_journal) {
|
|
target = jbd2_get_latest_transaction(sbi->s_journal);
|
|
if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
|
|
!jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
|
|
needs_barrier = true;
|
|
|
|
if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
|
|
if (wait)
|
|
ret = jbd2_log_wait_commit(sbi->s_journal,
|
|
target);
|
|
}
|
|
} else if (wait && test_opt(sb, BARRIER))
|
|
needs_barrier = true;
|
|
if (needs_barrier) {
|
|
int err;
|
|
err = blkdev_issue_flush(sb->s_bdev);
|
|
if (!ret)
|
|
ret = err;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* LVM calls this function before a (read-only) snapshot is created. This
|
|
* gives us a chance to flush the journal completely and mark the fs clean.
|
|
*
|
|
* Note that only this function cannot bring a filesystem to be in a clean
|
|
* state independently. It relies on upper layer to stop all data & metadata
|
|
* modifications.
|
|
*/
|
|
static int ext4_freeze(struct super_block *sb)
|
|
{
|
|
int error = 0;
|
|
journal_t *journal = EXT4_SB(sb)->s_journal;
|
|
|
|
if (journal) {
|
|
/* Now we set up the journal barrier. */
|
|
jbd2_journal_lock_updates(journal);
|
|
|
|
/*
|
|
* Don't clear the needs_recovery flag if we failed to
|
|
* flush the journal.
|
|
*/
|
|
error = jbd2_journal_flush(journal, 0);
|
|
if (error < 0)
|
|
goto out;
|
|
|
|
/* Journal blocked and flushed, clear needs_recovery flag. */
|
|
ext4_clear_feature_journal_needs_recovery(sb);
|
|
if (ext4_orphan_file_empty(sb))
|
|
ext4_clear_feature_orphan_present(sb);
|
|
}
|
|
|
|
error = ext4_commit_super(sb);
|
|
out:
|
|
if (journal)
|
|
/* we rely on upper layer to stop further updates */
|
|
jbd2_journal_unlock_updates(journal);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called by LVM after the snapshot is done. We need to reset the RECOVER
|
|
* flag here, even though the filesystem is not technically dirty yet.
|
|
*/
|
|
static int ext4_unfreeze(struct super_block *sb)
|
|
{
|
|
if (ext4_forced_shutdown(sb))
|
|
return 0;
|
|
|
|
if (EXT4_SB(sb)->s_journal) {
|
|
/* Reset the needs_recovery flag before the fs is unlocked. */
|
|
ext4_set_feature_journal_needs_recovery(sb);
|
|
if (ext4_has_feature_orphan_file(sb))
|
|
ext4_set_feature_orphan_present(sb);
|
|
}
|
|
|
|
ext4_commit_super(sb);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Structure to save mount options for ext4_remount's benefit
|
|
*/
|
|
struct ext4_mount_options {
|
|
unsigned long s_mount_opt;
|
|
unsigned long s_mount_opt2;
|
|
kuid_t s_resuid;
|
|
kgid_t s_resgid;
|
|
unsigned long s_commit_interval;
|
|
u32 s_min_batch_time, s_max_batch_time;
|
|
#ifdef CONFIG_QUOTA
|
|
int s_jquota_fmt;
|
|
char *s_qf_names[EXT4_MAXQUOTAS];
|
|
#endif
|
|
};
|
|
|
|
static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
|
|
{
|
|
struct ext4_fs_context *ctx = fc->fs_private;
|
|
struct ext4_super_block *es;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
unsigned long old_sb_flags;
|
|
struct ext4_mount_options old_opts;
|
|
ext4_group_t g;
|
|
int err = 0;
|
|
int alloc_ctx;
|
|
#ifdef CONFIG_QUOTA
|
|
int enable_quota = 0;
|
|
int i, j;
|
|
char *to_free[EXT4_MAXQUOTAS];
|
|
#endif
|
|
|
|
|
|
/* Store the original options */
|
|
old_sb_flags = sb->s_flags;
|
|
old_opts.s_mount_opt = sbi->s_mount_opt;
|
|
old_opts.s_mount_opt2 = sbi->s_mount_opt2;
|
|
old_opts.s_resuid = sbi->s_resuid;
|
|
old_opts.s_resgid = sbi->s_resgid;
|
|
old_opts.s_commit_interval = sbi->s_commit_interval;
|
|
old_opts.s_min_batch_time = sbi->s_min_batch_time;
|
|
old_opts.s_max_batch_time = sbi->s_max_batch_time;
|
|
#ifdef CONFIG_QUOTA
|
|
old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
if (sbi->s_qf_names[i]) {
|
|
char *qf_name = get_qf_name(sb, sbi, i);
|
|
|
|
old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL);
|
|
if (!old_opts.s_qf_names[i]) {
|
|
for (j = 0; j < i; j++)
|
|
kfree(old_opts.s_qf_names[j]);
|
|
return -ENOMEM;
|
|
}
|
|
} else
|
|
old_opts.s_qf_names[i] = NULL;
|
|
#endif
|
|
if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) {
|
|
if (sbi->s_journal && sbi->s_journal->j_task->io_context)
|
|
ctx->journal_ioprio =
|
|
sbi->s_journal->j_task->io_context->ioprio;
|
|
else
|
|
ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
|
|
|
|
}
|
|
|
|
/*
|
|
* Changing the DIOREAD_NOLOCK or DELALLOC mount options may cause
|
|
* two calls to ext4_should_dioread_nolock() to return inconsistent
|
|
* values, triggering WARN_ON in ext4_add_complete_io(). we grab
|
|
* here s_writepages_rwsem to avoid race between writepages ops and
|
|
* remount.
|
|
*/
|
|
alloc_ctx = ext4_writepages_down_write(sb);
|
|
ext4_apply_options(fc, sb);
|
|
ext4_writepages_up_write(sb, alloc_ctx);
|
|
|
|
if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
|
|
test_opt(sb, JOURNAL_CHECKSUM)) {
|
|
ext4_msg(sb, KERN_ERR, "changing journal_checksum "
|
|
"during remount not supported; ignoring");
|
|
sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM;
|
|
}
|
|
|
|
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
|
|
if (test_opt2(sb, EXPLICIT_DELALLOC)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"both data=journal and delalloc");
|
|
err = -EINVAL;
|
|
goto restore_opts;
|
|
}
|
|
if (test_opt(sb, DIOREAD_NOLOCK)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"both data=journal and dioread_nolock");
|
|
err = -EINVAL;
|
|
goto restore_opts;
|
|
}
|
|
} else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) {
|
|
if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
|
|
ext4_msg(sb, KERN_ERR, "can't mount with "
|
|
"journal_async_commit in data=ordered mode");
|
|
err = -EINVAL;
|
|
goto restore_opts;
|
|
}
|
|
}
|
|
|
|
if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) {
|
|
ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount");
|
|
err = -EINVAL;
|
|
goto restore_opts;
|
|
}
|
|
|
|
if (test_opt2(sb, ABORT))
|
|
ext4_abort(sb, ESHUTDOWN, "Abort forced by user");
|
|
|
|
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
|
|
(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
|
|
|
|
es = sbi->s_es;
|
|
|
|
if (sbi->s_journal) {
|
|
ext4_init_journal_params(sb, sbi->s_journal);
|
|
set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
|
|
}
|
|
|
|
/* Flush outstanding errors before changing fs state */
|
|
flush_work(&sbi->s_sb_upd_work);
|
|
|
|
if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {
|
|
if (ext4_forced_shutdown(sb)) {
|
|
err = -EROFS;
|
|
goto restore_opts;
|
|
}
|
|
|
|
if (fc->sb_flags & SB_RDONLY) {
|
|
err = sync_filesystem(sb);
|
|
if (err < 0)
|
|
goto restore_opts;
|
|
err = dquot_suspend(sb, -1);
|
|
if (err < 0)
|
|
goto restore_opts;
|
|
|
|
/*
|
|
* First of all, the unconditional stuff we have to do
|
|
* to disable replay of the journal when we next remount
|
|
*/
|
|
sb->s_flags |= SB_RDONLY;
|
|
|
|
/*
|
|
* OK, test if we are remounting a valid rw partition
|
|
* readonly, and if so set the rdonly flag and then
|
|
* mark the partition as valid again.
|
|
*/
|
|
if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) &&
|
|
(sbi->s_mount_state & EXT4_VALID_FS))
|
|
es->s_state = cpu_to_le16(sbi->s_mount_state);
|
|
|
|
if (sbi->s_journal) {
|
|
/*
|
|
* We let remount-ro finish even if marking fs
|
|
* as clean failed...
|
|
*/
|
|
ext4_mark_recovery_complete(sb, es);
|
|
}
|
|
} else {
|
|
/* Make sure we can mount this feature set readwrite */
|
|
if (ext4_has_feature_readonly(sb) ||
|
|
!ext4_feature_set_ok(sb, 0)) {
|
|
err = -EROFS;
|
|
goto restore_opts;
|
|
}
|
|
/*
|
|
* Make sure the group descriptor checksums
|
|
* are sane. If they aren't, refuse to remount r/w.
|
|
*/
|
|
for (g = 0; g < sbi->s_groups_count; g++) {
|
|
struct ext4_group_desc *gdp =
|
|
ext4_get_group_desc(sb, g, NULL);
|
|
|
|
if (!ext4_group_desc_csum_verify(sb, g, gdp)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"ext4_remount: Checksum for group %u failed (%u!=%u)",
|
|
g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)),
|
|
le16_to_cpu(gdp->bg_checksum));
|
|
err = -EFSBADCRC;
|
|
goto restore_opts;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we have an unprocessed orphan list hanging
|
|
* around from a previously readonly bdev mount,
|
|
* require a full umount/remount for now.
|
|
*/
|
|
if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) {
|
|
ext4_msg(sb, KERN_WARNING, "Couldn't "
|
|
"remount RDWR because of unprocessed "
|
|
"orphan inode list. Please "
|
|
"umount/remount instead");
|
|
err = -EINVAL;
|
|
goto restore_opts;
|
|
}
|
|
|
|
/*
|
|
* Mounting a RDONLY partition read-write, so reread
|
|
* and store the current valid flag. (It may have
|
|
* been changed by e2fsck since we originally mounted
|
|
* the partition.)
|
|
*/
|
|
if (sbi->s_journal) {
|
|
err = ext4_clear_journal_err(sb, es);
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
sbi->s_mount_state = (le16_to_cpu(es->s_state) &
|
|
~EXT4_FC_REPLAY);
|
|
|
|
err = ext4_setup_super(sb, es, 0);
|
|
if (err)
|
|
goto restore_opts;
|
|
|
|
sb->s_flags &= ~SB_RDONLY;
|
|
if (ext4_has_feature_mmp(sb)) {
|
|
err = ext4_multi_mount_protect(sb,
|
|
le64_to_cpu(es->s_mmp_block));
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
#ifdef CONFIG_QUOTA
|
|
enable_quota = 1;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle creation of system zone data early because it can fail.
|
|
* Releasing of existing data is done when we are sure remount will
|
|
* succeed.
|
|
*/
|
|
if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) {
|
|
err = ext4_setup_system_zone(sb);
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
|
|
if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {
|
|
err = ext4_commit_super(sb);
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
if (enable_quota) {
|
|
if (sb_any_quota_suspended(sb))
|
|
dquot_resume(sb, -1);
|
|
else if (ext4_has_feature_quota(sb)) {
|
|
err = ext4_enable_quotas(sb);
|
|
if (err)
|
|
goto restore_opts;
|
|
}
|
|
}
|
|
/* Release old quota file names */
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
kfree(old_opts.s_qf_names[i]);
|
|
#endif
|
|
if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)
|
|
ext4_release_system_zone(sb);
|
|
|
|
/*
|
|
* Reinitialize lazy itable initialization thread based on
|
|
* current settings
|
|
*/
|
|
if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE))
|
|
ext4_unregister_li_request(sb);
|
|
else {
|
|
ext4_group_t first_not_zeroed;
|
|
first_not_zeroed = ext4_has_uninit_itable(sb);
|
|
ext4_register_li_request(sb, first_not_zeroed);
|
|
}
|
|
|
|
if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb))
|
|
ext4_stop_mmpd(sbi);
|
|
|
|
return 0;
|
|
|
|
restore_opts:
|
|
/*
|
|
* If there was a failing r/w to ro transition, we may need to
|
|
* re-enable quota
|
|
*/
|
|
if (sb_rdonly(sb) && !(old_sb_flags & SB_RDONLY) &&
|
|
sb_any_quota_suspended(sb))
|
|
dquot_resume(sb, -1);
|
|
|
|
alloc_ctx = ext4_writepages_down_write(sb);
|
|
sb->s_flags = old_sb_flags;
|
|
sbi->s_mount_opt = old_opts.s_mount_opt;
|
|
sbi->s_mount_opt2 = old_opts.s_mount_opt2;
|
|
sbi->s_resuid = old_opts.s_resuid;
|
|
sbi->s_resgid = old_opts.s_resgid;
|
|
sbi->s_commit_interval = old_opts.s_commit_interval;
|
|
sbi->s_min_batch_time = old_opts.s_min_batch_time;
|
|
sbi->s_max_batch_time = old_opts.s_max_batch_time;
|
|
ext4_writepages_up_write(sb, alloc_ctx);
|
|
|
|
if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)
|
|
ext4_release_system_zone(sb);
|
|
#ifdef CONFIG_QUOTA
|
|
sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
|
|
to_free[i] = get_qf_name(sb, sbi, i);
|
|
rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]);
|
|
}
|
|
synchronize_rcu();
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++)
|
|
kfree(to_free[i]);
|
|
#endif
|
|
if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb))
|
|
ext4_stop_mmpd(sbi);
|
|
return err;
|
|
}
|
|
|
|
static int ext4_reconfigure(struct fs_context *fc)
|
|
{
|
|
struct super_block *sb = fc->root->d_sb;
|
|
int ret;
|
|
|
|
fc->s_fs_info = EXT4_SB(sb);
|
|
|
|
ret = ext4_check_opt_consistency(fc, sb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = __ext4_remount(fc, sb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.",
|
|
&sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w",
|
|
ext4_quota_mode(sb));
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
static int ext4_statfs_project(struct super_block *sb,
|
|
kprojid_t projid, struct kstatfs *buf)
|
|
{
|
|
struct kqid qid;
|
|
struct dquot *dquot;
|
|
u64 limit;
|
|
u64 curblock;
|
|
|
|
qid = make_kqid_projid(projid);
|
|
dquot = dqget(sb, qid);
|
|
if (IS_ERR(dquot))
|
|
return PTR_ERR(dquot);
|
|
spin_lock(&dquot->dq_dqb_lock);
|
|
|
|
limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
|
|
dquot->dq_dqb.dqb_bhardlimit);
|
|
limit >>= sb->s_blocksize_bits;
|
|
|
|
if (limit && buf->f_blocks > limit) {
|
|
curblock = (dquot->dq_dqb.dqb_curspace +
|
|
dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
|
|
buf->f_blocks = limit;
|
|
buf->f_bfree = buf->f_bavail =
|
|
(buf->f_blocks > curblock) ?
|
|
(buf->f_blocks - curblock) : 0;
|
|
}
|
|
|
|
limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
|
|
dquot->dq_dqb.dqb_ihardlimit);
|
|
if (limit && buf->f_files > limit) {
|
|
buf->f_files = limit;
|
|
buf->f_ffree =
|
|
(buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
|
|
(buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
|
|
}
|
|
|
|
spin_unlock(&dquot->dq_dqb_lock);
|
|
dqput(dquot);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct ext4_super_block *es = sbi->s_es;
|
|
ext4_fsblk_t overhead = 0, resv_blocks;
|
|
s64 bfree;
|
|
resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters));
|
|
|
|
if (!test_opt(sb, MINIX_DF))
|
|
overhead = sbi->s_overhead;
|
|
|
|
buf->f_type = EXT4_SUPER_MAGIC;
|
|
buf->f_bsize = sb->s_blocksize;
|
|
buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);
|
|
bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -
|
|
percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);
|
|
/* prevent underflow in case that few free space is available */
|
|
buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0));
|
|
buf->f_bavail = buf->f_bfree -
|
|
(ext4_r_blocks_count(es) + resv_blocks);
|
|
if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks))
|
|
buf->f_bavail = 0;
|
|
buf->f_files = le32_to_cpu(es->s_inodes_count);
|
|
buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
|
|
buf->f_namelen = EXT4_NAME_LEN;
|
|
buf->f_fsid = uuid_to_fsid(es->s_uuid);
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) &&
|
|
sb_has_quota_limits_enabled(sb, PRJQUOTA))
|
|
ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_QUOTA
|
|
|
|
/*
|
|
* Helper functions so that transaction is started before we acquire dqio_sem
|
|
* to keep correct lock ordering of transaction > dqio_sem
|
|
*/
|
|
static inline struct inode *dquot_to_inode(struct dquot *dquot)
|
|
{
|
|
return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];
|
|
}
|
|
|
|
static int ext4_write_dquot(struct dquot *dquot)
|
|
{
|
|
int ret, err;
|
|
handle_t *handle;
|
|
struct inode *inode;
|
|
|
|
inode = dquot_to_inode(dquot);
|
|
handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
|
|
EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
|
|
if (IS_ERR(handle))
|
|
return PTR_ERR(handle);
|
|
ret = dquot_commit(dquot);
|
|
if (ret < 0)
|
|
ext4_error_err(dquot->dq_sb, -ret,
|
|
"Failed to commit dquot type %d",
|
|
dquot->dq_id.type);
|
|
err = ext4_journal_stop(handle);
|
|
if (!ret)
|
|
ret = err;
|
|
return ret;
|
|
}
|
|
|
|
static int ext4_acquire_dquot(struct dquot *dquot)
|
|
{
|
|
int ret, err;
|
|
handle_t *handle;
|
|
|
|
handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA,
|
|
EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb));
|
|
if (IS_ERR(handle))
|
|
return PTR_ERR(handle);
|
|
ret = dquot_acquire(dquot);
|
|
if (ret < 0)
|
|
ext4_error_err(dquot->dq_sb, -ret,
|
|
"Failed to acquire dquot type %d",
|
|
dquot->dq_id.type);
|
|
err = ext4_journal_stop(handle);
|
|
if (!ret)
|
|
ret = err;
|
|
return ret;
|
|
}
|
|
|
|
static int ext4_release_dquot(struct dquot *dquot)
|
|
{
|
|
int ret, err;
|
|
handle_t *handle;
|
|
|
|
handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA,
|
|
EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb));
|
|
if (IS_ERR(handle)) {
|
|
/* Release dquot anyway to avoid endless cycle in dqput() */
|
|
dquot_release(dquot);
|
|
return PTR_ERR(handle);
|
|
}
|
|
ret = dquot_release(dquot);
|
|
if (ret < 0)
|
|
ext4_error_err(dquot->dq_sb, -ret,
|
|
"Failed to release dquot type %d",
|
|
dquot->dq_id.type);
|
|
err = ext4_journal_stop(handle);
|
|
if (!ret)
|
|
ret = err;
|
|
return ret;
|
|
}
|
|
|
|
static int ext4_mark_dquot_dirty(struct dquot *dquot)
|
|
{
|
|
struct super_block *sb = dquot->dq_sb;
|
|
|
|
if (ext4_is_quota_journalled(sb)) {
|
|
dquot_mark_dquot_dirty(dquot);
|
|
return ext4_write_dquot(dquot);
|
|
} else {
|
|
return dquot_mark_dquot_dirty(dquot);
|
|
}
|
|
}
|
|
|
|
static int ext4_write_info(struct super_block *sb, int type)
|
|
{
|
|
int ret, err;
|
|
handle_t *handle;
|
|
|
|
/* Data block + inode block */
|
|
handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2);
|
|
if (IS_ERR(handle))
|
|
return PTR_ERR(handle);
|
|
ret = dquot_commit_info(sb, type);
|
|
err = ext4_journal_stop(handle);
|
|
if (!ret)
|
|
ret = err;
|
|
return ret;
|
|
}
|
|
|
|
static void lockdep_set_quota_inode(struct inode *inode, int subclass)
|
|
{
|
|
struct ext4_inode_info *ei = EXT4_I(inode);
|
|
|
|
/* The first argument of lockdep_set_subclass has to be
|
|
* *exactly* the same as the argument to init_rwsem() --- in
|
|
* this case, in init_once() --- or lockdep gets unhappy
|
|
* because the name of the lock is set using the
|
|
* stringification of the argument to init_rwsem().
|
|
*/
|
|
(void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */
|
|
lockdep_set_subclass(&ei->i_data_sem, subclass);
|
|
}
|
|
|
|
/*
|
|
* Standard function to be called on quota_on
|
|
*/
|
|
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
|
|
const struct path *path)
|
|
{
|
|
int err;
|
|
|
|
if (!test_opt(sb, QUOTA))
|
|
return -EINVAL;
|
|
|
|
/* Quotafile not on the same filesystem? */
|
|
if (path->dentry->d_sb != sb)
|
|
return -EXDEV;
|
|
|
|
/* Quota already enabled for this file? */
|
|
if (IS_NOQUOTA(d_inode(path->dentry)))
|
|
return -EBUSY;
|
|
|
|
/* Journaling quota? */
|
|
if (EXT4_SB(sb)->s_qf_names[type]) {
|
|
/* Quotafile not in fs root? */
|
|
if (path->dentry->d_parent != sb->s_root)
|
|
ext4_msg(sb, KERN_WARNING,
|
|
"Quota file not on filesystem root. "
|
|
"Journaled quota will not work");
|
|
sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY;
|
|
} else {
|
|
/*
|
|
* Clear the flag just in case mount options changed since
|
|
* last time.
|
|
*/
|
|
sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY;
|
|
}
|
|
|
|
lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);
|
|
err = dquot_quota_on(sb, type, format_id, path);
|
|
if (!err) {
|
|
struct inode *inode = d_inode(path->dentry);
|
|
handle_t *handle;
|
|
|
|
/*
|
|
* Set inode flags to prevent userspace from messing with quota
|
|
* files. If this fails, we return success anyway since quotas
|
|
* are already enabled and this is not a hard failure.
|
|
*/
|
|
inode_lock(inode);
|
|
handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1);
|
|
if (IS_ERR(handle))
|
|
goto unlock_inode;
|
|
EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL;
|
|
inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
|
|
S_NOATIME | S_IMMUTABLE);
|
|
err = ext4_mark_inode_dirty(handle, inode);
|
|
ext4_journal_stop(handle);
|
|
unlock_inode:
|
|
inode_unlock(inode);
|
|
if (err)
|
|
dquot_quota_off(sb, type);
|
|
}
|
|
if (err)
|
|
lockdep_set_quota_inode(path->dentry->d_inode,
|
|
I_DATA_SEM_NORMAL);
|
|
return err;
|
|
}
|
|
|
|
static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum)
|
|
{
|
|
switch (type) {
|
|
case USRQUOTA:
|
|
return qf_inum == EXT4_USR_QUOTA_INO;
|
|
case GRPQUOTA:
|
|
return qf_inum == EXT4_GRP_QUOTA_INO;
|
|
case PRJQUOTA:
|
|
return qf_inum >= EXT4_GOOD_OLD_FIRST_INO;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static int ext4_quota_enable(struct super_block *sb, int type, int format_id,
|
|
unsigned int flags)
|
|
{
|
|
int err;
|
|
struct inode *qf_inode;
|
|
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
|
|
};
|
|
|
|
BUG_ON(!ext4_has_feature_quota(sb));
|
|
|
|
if (!qf_inums[type])
|
|
return -EPERM;
|
|
|
|
if (!ext4_check_quota_inum(type, qf_inums[type])) {
|
|
ext4_error(sb, "Bad quota inum: %lu, type: %d",
|
|
qf_inums[type], type);
|
|
return -EUCLEAN;
|
|
}
|
|
|
|
qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL);
|
|
if (IS_ERR(qf_inode)) {
|
|
ext4_error(sb, "Bad quota inode: %lu, type: %d",
|
|
qf_inums[type], type);
|
|
return PTR_ERR(qf_inode);
|
|
}
|
|
|
|
/* Don't account quota for quota files to avoid recursion */
|
|
qf_inode->i_flags |= S_NOQUOTA;
|
|
lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA);
|
|
err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
|
|
if (err)
|
|
lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL);
|
|
iput(qf_inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/* Enable usage tracking for all quota types. */
|
|
int ext4_enable_quotas(struct super_block *sb)
|
|
{
|
|
int type, err = 0;
|
|
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
|
|
le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
|
|
};
|
|
bool quota_mopt[EXT4_MAXQUOTAS] = {
|
|
test_opt(sb, USRQUOTA),
|
|
test_opt(sb, GRPQUOTA),
|
|
test_opt(sb, PRJQUOTA),
|
|
};
|
|
|
|
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY;
|
|
for (type = 0; type < EXT4_MAXQUOTAS; type++) {
|
|
if (qf_inums[type]) {
|
|
err = ext4_quota_enable(sb, type, QFMT_VFS_V1,
|
|
DQUOT_USAGE_ENABLED |
|
|
(quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
|
|
if (err) {
|
|
ext4_warning(sb,
|
|
"Failed to enable quota tracking "
|
|
"(type=%d, err=%d, ino=%lu). "
|
|
"Please run e2fsck to fix.", type,
|
|
err, qf_inums[type]);
|
|
|
|
ext4_quotas_off(sb, type);
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_quota_off(struct super_block *sb, int type)
|
|
{
|
|
struct inode *inode = sb_dqopt(sb)->files[type];
|
|
handle_t *handle;
|
|
int err;
|
|
|
|
/* Force all delayed allocation blocks to be allocated.
|
|
* Caller already holds s_umount sem */
|
|
if (test_opt(sb, DELALLOC))
|
|
sync_filesystem(sb);
|
|
|
|
if (!inode || !igrab(inode))
|
|
goto out;
|
|
|
|
err = dquot_quota_off(sb, type);
|
|
if (err || ext4_has_feature_quota(sb))
|
|
goto out_put;
|
|
/*
|
|
* When the filesystem was remounted read-only first, we cannot cleanup
|
|
* inode flags here. Bad luck but people should be using QUOTA feature
|
|
* these days anyway.
|
|
*/
|
|
if (sb_rdonly(sb))
|
|
goto out_put;
|
|
|
|
inode_lock(inode);
|
|
/*
|
|
* Update modification times of quota files when userspace can
|
|
* start looking at them. If we fail, we return success anyway since
|
|
* this is not a hard failure and quotas are already disabled.
|
|
*/
|
|
handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1);
|
|
if (IS_ERR(handle)) {
|
|
err = PTR_ERR(handle);
|
|
goto out_unlock;
|
|
}
|
|
EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL);
|
|
inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
|
|
inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
|
|
err = ext4_mark_inode_dirty(handle, inode);
|
|
ext4_journal_stop(handle);
|
|
out_unlock:
|
|
inode_unlock(inode);
|
|
out_put:
|
|
lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL);
|
|
iput(inode);
|
|
return err;
|
|
out:
|
|
return dquot_quota_off(sb, type);
|
|
}
|
|
|
|
/* Read data from quotafile - avoid pagecache and such because we cannot afford
|
|
* acquiring the locks... As quota files are never truncated and quota code
|
|
* itself serializes the operations (and no one else should touch the files)
|
|
* we don't have to be afraid of races */
|
|
static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
|
|
size_t len, loff_t off)
|
|
{
|
|
struct inode *inode = sb_dqopt(sb)->files[type];
|
|
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
|
|
int offset = off & (sb->s_blocksize - 1);
|
|
int tocopy;
|
|
size_t toread;
|
|
struct buffer_head *bh;
|
|
loff_t i_size = i_size_read(inode);
|
|
|
|
if (off > i_size)
|
|
return 0;
|
|
if (off+len > i_size)
|
|
len = i_size-off;
|
|
toread = len;
|
|
while (toread > 0) {
|
|
tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
|
|
bh = ext4_bread(NULL, inode, blk, 0);
|
|
if (IS_ERR(bh))
|
|
return PTR_ERR(bh);
|
|
if (!bh) /* A hole? */
|
|
memset(data, 0, tocopy);
|
|
else
|
|
memcpy(data, bh->b_data+offset, tocopy);
|
|
brelse(bh);
|
|
offset = 0;
|
|
toread -= tocopy;
|
|
data += tocopy;
|
|
blk++;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* Write to quotafile (we know the transaction is already started and has
|
|
* enough credits) */
|
|
static ssize_t ext4_quota_write(struct super_block *sb, int type,
|
|
const char *data, size_t len, loff_t off)
|
|
{
|
|
struct inode *inode = sb_dqopt(sb)->files[type];
|
|
ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb);
|
|
int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1);
|
|
int retries = 0;
|
|
struct buffer_head *bh;
|
|
handle_t *handle = journal_current_handle();
|
|
|
|
if (!handle) {
|
|
ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
|
|
" cancelled because transaction is not started",
|
|
(unsigned long long)off, (unsigned long long)len);
|
|
return -EIO;
|
|
}
|
|
/*
|
|
* Since we account only one data block in transaction credits,
|
|
* then it is impossible to cross a block boundary.
|
|
*/
|
|
if (sb->s_blocksize - offset < len) {
|
|
ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
|
|
" cancelled because not block aligned",
|
|
(unsigned long long)off, (unsigned long long)len);
|
|
return -EIO;
|
|
}
|
|
|
|
do {
|
|
bh = ext4_bread(handle, inode, blk,
|
|
EXT4_GET_BLOCKS_CREATE |
|
|
EXT4_GET_BLOCKS_METADATA_NOFAIL);
|
|
} while (PTR_ERR(bh) == -ENOSPC &&
|
|
ext4_should_retry_alloc(inode->i_sb, &retries));
|
|
if (IS_ERR(bh))
|
|
return PTR_ERR(bh);
|
|
if (!bh)
|
|
goto out;
|
|
BUFFER_TRACE(bh, "get write access");
|
|
err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE);
|
|
if (err) {
|
|
brelse(bh);
|
|
return err;
|
|
}
|
|
lock_buffer(bh);
|
|
memcpy(bh->b_data+offset, data, len);
|
|
flush_dcache_page(bh->b_page);
|
|
unlock_buffer(bh);
|
|
err = ext4_handle_dirty_metadata(handle, NULL, bh);
|
|
brelse(bh);
|
|
out:
|
|
if (inode->i_size < off + len) {
|
|
i_size_write(inode, off + len);
|
|
EXT4_I(inode)->i_disksize = inode->i_size;
|
|
err2 = ext4_mark_inode_dirty(handle, inode);
|
|
if (unlikely(err2 && !err))
|
|
err = err2;
|
|
}
|
|
return err ? err : len;
|
|
}
|
|
#endif
|
|
|
|
#if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2)
|
|
static inline void register_as_ext2(void)
|
|
{
|
|
int err = register_filesystem(&ext2_fs_type);
|
|
if (err)
|
|
printk(KERN_WARNING
|
|
"EXT4-fs: Unable to register as ext2 (%d)\n", err);
|
|
}
|
|
|
|
static inline void unregister_as_ext2(void)
|
|
{
|
|
unregister_filesystem(&ext2_fs_type);
|
|
}
|
|
|
|
static inline int ext2_feature_set_ok(struct super_block *sb)
|
|
{
|
|
if (ext4_has_unknown_ext2_incompat_features(sb))
|
|
return 0;
|
|
if (sb_rdonly(sb))
|
|
return 1;
|
|
if (ext4_has_unknown_ext2_ro_compat_features(sb))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
#else
|
|
static inline void register_as_ext2(void) { }
|
|
static inline void unregister_as_ext2(void) { }
|
|
static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; }
|
|
#endif
|
|
|
|
static inline void register_as_ext3(void)
|
|
{
|
|
int err = register_filesystem(&ext3_fs_type);
|
|
if (err)
|
|
printk(KERN_WARNING
|
|
"EXT4-fs: Unable to register as ext3 (%d)\n", err);
|
|
}
|
|
|
|
static inline void unregister_as_ext3(void)
|
|
{
|
|
unregister_filesystem(&ext3_fs_type);
|
|
}
|
|
|
|
static inline int ext3_feature_set_ok(struct super_block *sb)
|
|
{
|
|
if (ext4_has_unknown_ext3_incompat_features(sb))
|
|
return 0;
|
|
if (!ext4_has_feature_journal(sb))
|
|
return 0;
|
|
if (sb_rdonly(sb))
|
|
return 1;
|
|
if (ext4_has_unknown_ext3_ro_compat_features(sb))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void ext4_kill_sb(struct super_block *sb)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
struct file *bdev_file = sbi ? sbi->s_journal_bdev_file : NULL;
|
|
|
|
kill_block_super(sb);
|
|
|
|
if (bdev_file)
|
|
bdev_fput(bdev_file);
|
|
}
|
|
|
|
static struct file_system_type ext4_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ext4",
|
|
.init_fs_context = ext4_init_fs_context,
|
|
.parameters = ext4_param_specs,
|
|
.kill_sb = ext4_kill_sb,
|
|
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
|
|
};
|
|
MODULE_ALIAS_FS("ext4");
|
|
|
|
/* Shared across all ext4 file systems */
|
|
wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ];
|
|
|
|
static int __init ext4_init_fs(void)
|
|
{
|
|
int i, err;
|
|
|
|
ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64);
|
|
ext4_li_info = NULL;
|
|
|
|
/* Build-time check for flags consistency */
|
|
ext4_check_flag_values();
|
|
|
|
for (i = 0; i < EXT4_WQ_HASH_SZ; i++)
|
|
init_waitqueue_head(&ext4__ioend_wq[i]);
|
|
|
|
err = ext4_init_es();
|
|
if (err)
|
|
return err;
|
|
|
|
err = ext4_init_pending();
|
|
if (err)
|
|
goto out7;
|
|
|
|
err = ext4_init_post_read_processing();
|
|
if (err)
|
|
goto out6;
|
|
|
|
err = ext4_init_pageio();
|
|
if (err)
|
|
goto out5;
|
|
|
|
err = ext4_init_system_zone();
|
|
if (err)
|
|
goto out4;
|
|
|
|
err = ext4_init_sysfs();
|
|
if (err)
|
|
goto out3;
|
|
|
|
err = ext4_init_mballoc();
|
|
if (err)
|
|
goto out2;
|
|
err = init_inodecache();
|
|
if (err)
|
|
goto out1;
|
|
|
|
err = ext4_fc_init_dentry_cache();
|
|
if (err)
|
|
goto out05;
|
|
|
|
register_as_ext3();
|
|
register_as_ext2();
|
|
err = register_filesystem(&ext4_fs_type);
|
|
if (err)
|
|
goto out;
|
|
|
|
return 0;
|
|
out:
|
|
unregister_as_ext2();
|
|
unregister_as_ext3();
|
|
ext4_fc_destroy_dentry_cache();
|
|
out05:
|
|
destroy_inodecache();
|
|
out1:
|
|
ext4_exit_mballoc();
|
|
out2:
|
|
ext4_exit_sysfs();
|
|
out3:
|
|
ext4_exit_system_zone();
|
|
out4:
|
|
ext4_exit_pageio();
|
|
out5:
|
|
ext4_exit_post_read_processing();
|
|
out6:
|
|
ext4_exit_pending();
|
|
out7:
|
|
ext4_exit_es();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit ext4_exit_fs(void)
|
|
{
|
|
ext4_destroy_lazyinit_thread();
|
|
unregister_as_ext2();
|
|
unregister_as_ext3();
|
|
unregister_filesystem(&ext4_fs_type);
|
|
ext4_fc_destroy_dentry_cache();
|
|
destroy_inodecache();
|
|
ext4_exit_mballoc();
|
|
ext4_exit_sysfs();
|
|
ext4_exit_system_zone();
|
|
ext4_exit_pageio();
|
|
ext4_exit_post_read_processing();
|
|
ext4_exit_es();
|
|
ext4_exit_pending();
|
|
}
|
|
|
|
MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
|
|
MODULE_DESCRIPTION("Fourth Extended Filesystem");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_SOFTDEP("pre: crc32c");
|
|
module_init(ext4_init_fs)
|
|
module_exit(ext4_exit_fs)
|