mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 18:41:23 +00:00
fd60b28842
The inode allocation is supposed to use alloc_inode_sb(), so convert kmem_cache_alloc() of all filesystems to alloc_inode_sb(). Link: https://lkml.kernel.org/r/20220228122126.37293-5-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Theodore Ts'o <tytso@mit.edu> [ext4] Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Cc: Alex Shi <alexs@kernel.org> Cc: Anna Schumaker <Anna.Schumaker@Netapp.com> Cc: Chao Yu <chao@kernel.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Fam Zheng <fam.zheng@bytedance.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kari Argillander <kari.argillander@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
504 lines
12 KiB
C
504 lines
12 KiB
C
/*
|
|
* linux/fs/hfs/super.c
|
|
*
|
|
* Copyright (C) 1995-1997 Paul H. Hargrove
|
|
* (C) 2003 Ardis Technologies <roman@ardistech.com>
|
|
* This file may be distributed under the terms of the GNU General Public License.
|
|
*
|
|
* This file contains hfs_read_super(), some of the super_ops and
|
|
* init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in
|
|
* inode.c since they deal with inodes.
|
|
*
|
|
* Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/init.h>
|
|
#include <linux/nls.h>
|
|
#include <linux/parser.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vfs.h>
|
|
|
|
#include "hfs_fs.h"
|
|
#include "btree.h"
|
|
|
|
static struct kmem_cache *hfs_inode_cachep;
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int hfs_sync_fs(struct super_block *sb, int wait)
|
|
{
|
|
hfs_mdb_commit(sb);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* hfs_put_super()
|
|
*
|
|
* This is the put_super() entry in the super_operations structure for
|
|
* HFS filesystems. The purpose is to release the resources
|
|
* associated with the superblock sb.
|
|
*/
|
|
static void hfs_put_super(struct super_block *sb)
|
|
{
|
|
cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
|
|
hfs_mdb_close(sb);
|
|
/* release the MDB's resources */
|
|
hfs_mdb_put(sb);
|
|
}
|
|
|
|
static void flush_mdb(struct work_struct *work)
|
|
{
|
|
struct hfs_sb_info *sbi;
|
|
struct super_block *sb;
|
|
|
|
sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
|
|
sb = sbi->sb;
|
|
|
|
spin_lock(&sbi->work_lock);
|
|
sbi->work_queued = 0;
|
|
spin_unlock(&sbi->work_lock);
|
|
|
|
hfs_mdb_commit(sb);
|
|
}
|
|
|
|
void hfs_mark_mdb_dirty(struct super_block *sb)
|
|
{
|
|
struct hfs_sb_info *sbi = HFS_SB(sb);
|
|
unsigned long delay;
|
|
|
|
if (sb_rdonly(sb))
|
|
return;
|
|
|
|
spin_lock(&sbi->work_lock);
|
|
if (!sbi->work_queued) {
|
|
delay = msecs_to_jiffies(dirty_writeback_interval * 10);
|
|
queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
|
|
sbi->work_queued = 1;
|
|
}
|
|
spin_unlock(&sbi->work_lock);
|
|
}
|
|
|
|
/*
|
|
* hfs_statfs()
|
|
*
|
|
* This is the statfs() entry in the super_operations structure for
|
|
* HFS filesystems. The purpose is to return various data about the
|
|
* filesystem.
|
|
*
|
|
* changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
|
|
*/
|
|
static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
|
|
|
|
buf->f_type = HFS_SUPER_MAGIC;
|
|
buf->f_bsize = sb->s_blocksize;
|
|
buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
|
|
buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div;
|
|
buf->f_bavail = buf->f_bfree;
|
|
buf->f_files = HFS_SB(sb)->fs_ablocks;
|
|
buf->f_ffree = HFS_SB(sb)->free_ablocks;
|
|
buf->f_fsid = u64_to_fsid(id);
|
|
buf->f_namelen = HFS_NAMELEN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hfs_remount(struct super_block *sb, int *flags, char *data)
|
|
{
|
|
sync_filesystem(sb);
|
|
*flags |= SB_NODIRATIME;
|
|
if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
|
|
return 0;
|
|
if (!(*flags & SB_RDONLY)) {
|
|
if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) {
|
|
pr_warn("filesystem was not cleanly unmounted, running fsck.hfs is recommended. leaving read-only.\n");
|
|
sb->s_flags |= SB_RDONLY;
|
|
*flags |= SB_RDONLY;
|
|
} else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) {
|
|
pr_warn("filesystem is marked locked, leaving read-only.\n");
|
|
sb->s_flags |= SB_RDONLY;
|
|
*flags |= SB_RDONLY;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int hfs_show_options(struct seq_file *seq, struct dentry *root)
|
|
{
|
|
struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
|
|
|
|
if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
|
|
seq_show_option_n(seq, "creator", (char *)&sbi->s_creator, 4);
|
|
if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
|
|
seq_show_option_n(seq, "type", (char *)&sbi->s_type, 4);
|
|
seq_printf(seq, ",uid=%u,gid=%u",
|
|
from_kuid_munged(&init_user_ns, sbi->s_uid),
|
|
from_kgid_munged(&init_user_ns, sbi->s_gid));
|
|
if (sbi->s_file_umask != 0133)
|
|
seq_printf(seq, ",file_umask=%o", sbi->s_file_umask);
|
|
if (sbi->s_dir_umask != 0022)
|
|
seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask);
|
|
if (sbi->part >= 0)
|
|
seq_printf(seq, ",part=%u", sbi->part);
|
|
if (sbi->session >= 0)
|
|
seq_printf(seq, ",session=%u", sbi->session);
|
|
if (sbi->nls_disk)
|
|
seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
|
|
if (sbi->nls_io)
|
|
seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
|
|
if (sbi->s_quiet)
|
|
seq_printf(seq, ",quiet");
|
|
return 0;
|
|
}
|
|
|
|
static struct inode *hfs_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct hfs_inode_info *i;
|
|
|
|
i = alloc_inode_sb(sb, hfs_inode_cachep, GFP_KERNEL);
|
|
return i ? &i->vfs_inode : NULL;
|
|
}
|
|
|
|
static void hfs_free_inode(struct inode *inode)
|
|
{
|
|
kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
|
|
}
|
|
|
|
static const struct super_operations hfs_super_operations = {
|
|
.alloc_inode = hfs_alloc_inode,
|
|
.free_inode = hfs_free_inode,
|
|
.write_inode = hfs_write_inode,
|
|
.evict_inode = hfs_evict_inode,
|
|
.put_super = hfs_put_super,
|
|
.sync_fs = hfs_sync_fs,
|
|
.statfs = hfs_statfs,
|
|
.remount_fs = hfs_remount,
|
|
.show_options = hfs_show_options,
|
|
};
|
|
|
|
enum {
|
|
opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
|
|
opt_part, opt_session, opt_type, opt_creator, opt_quiet,
|
|
opt_codepage, opt_iocharset,
|
|
opt_err
|
|
};
|
|
|
|
static const match_table_t tokens = {
|
|
{ opt_uid, "uid=%u" },
|
|
{ opt_gid, "gid=%u" },
|
|
{ opt_umask, "umask=%o" },
|
|
{ opt_file_umask, "file_umask=%o" },
|
|
{ opt_dir_umask, "dir_umask=%o" },
|
|
{ opt_part, "part=%u" },
|
|
{ opt_session, "session=%u" },
|
|
{ opt_type, "type=%s" },
|
|
{ opt_creator, "creator=%s" },
|
|
{ opt_quiet, "quiet" },
|
|
{ opt_codepage, "codepage=%s" },
|
|
{ opt_iocharset, "iocharset=%s" },
|
|
{ opt_err, NULL }
|
|
};
|
|
|
|
static inline int match_fourchar(substring_t *arg, u32 *result)
|
|
{
|
|
if (arg->to - arg->from != 4)
|
|
return -EINVAL;
|
|
memcpy(result, arg->from, 4);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* parse_options()
|
|
*
|
|
* adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger
|
|
* This function is called by hfs_read_super() to parse the mount options.
|
|
*/
|
|
static int parse_options(char *options, struct hfs_sb_info *hsb)
|
|
{
|
|
char *p;
|
|
substring_t args[MAX_OPT_ARGS];
|
|
int tmp, token;
|
|
|
|
/* initialize the sb with defaults */
|
|
hsb->s_uid = current_uid();
|
|
hsb->s_gid = current_gid();
|
|
hsb->s_file_umask = 0133;
|
|
hsb->s_dir_umask = 0022;
|
|
hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
|
|
hsb->s_quiet = 0;
|
|
hsb->part = -1;
|
|
hsb->session = -1;
|
|
|
|
if (!options)
|
|
return 1;
|
|
|
|
while ((p = strsep(&options, ",")) != NULL) {
|
|
if (!*p)
|
|
continue;
|
|
|
|
token = match_token(p, tokens, args);
|
|
switch (token) {
|
|
case opt_uid:
|
|
if (match_int(&args[0], &tmp)) {
|
|
pr_err("uid requires an argument\n");
|
|
return 0;
|
|
}
|
|
hsb->s_uid = make_kuid(current_user_ns(), (uid_t)tmp);
|
|
if (!uid_valid(hsb->s_uid)) {
|
|
pr_err("invalid uid %d\n", tmp);
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_gid:
|
|
if (match_int(&args[0], &tmp)) {
|
|
pr_err("gid requires an argument\n");
|
|
return 0;
|
|
}
|
|
hsb->s_gid = make_kgid(current_user_ns(), (gid_t)tmp);
|
|
if (!gid_valid(hsb->s_gid)) {
|
|
pr_err("invalid gid %d\n", tmp);
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_umask:
|
|
if (match_octal(&args[0], &tmp)) {
|
|
pr_err("umask requires a value\n");
|
|
return 0;
|
|
}
|
|
hsb->s_file_umask = (umode_t)tmp;
|
|
hsb->s_dir_umask = (umode_t)tmp;
|
|
break;
|
|
case opt_file_umask:
|
|
if (match_octal(&args[0], &tmp)) {
|
|
pr_err("file_umask requires a value\n");
|
|
return 0;
|
|
}
|
|
hsb->s_file_umask = (umode_t)tmp;
|
|
break;
|
|
case opt_dir_umask:
|
|
if (match_octal(&args[0], &tmp)) {
|
|
pr_err("dir_umask requires a value\n");
|
|
return 0;
|
|
}
|
|
hsb->s_dir_umask = (umode_t)tmp;
|
|
break;
|
|
case opt_part:
|
|
if (match_int(&args[0], &hsb->part)) {
|
|
pr_err("part requires an argument\n");
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_session:
|
|
if (match_int(&args[0], &hsb->session)) {
|
|
pr_err("session requires an argument\n");
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_type:
|
|
if (match_fourchar(&args[0], &hsb->s_type)) {
|
|
pr_err("type requires a 4 character value\n");
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_creator:
|
|
if (match_fourchar(&args[0], &hsb->s_creator)) {
|
|
pr_err("creator requires a 4 character value\n");
|
|
return 0;
|
|
}
|
|
break;
|
|
case opt_quiet:
|
|
hsb->s_quiet = 1;
|
|
break;
|
|
case opt_codepage:
|
|
if (hsb->nls_disk) {
|
|
pr_err("unable to change codepage\n");
|
|
return 0;
|
|
}
|
|
p = match_strdup(&args[0]);
|
|
if (p)
|
|
hsb->nls_disk = load_nls(p);
|
|
if (!hsb->nls_disk) {
|
|
pr_err("unable to load codepage \"%s\"\n", p);
|
|
kfree(p);
|
|
return 0;
|
|
}
|
|
kfree(p);
|
|
break;
|
|
case opt_iocharset:
|
|
if (hsb->nls_io) {
|
|
pr_err("unable to change iocharset\n");
|
|
return 0;
|
|
}
|
|
p = match_strdup(&args[0]);
|
|
if (p)
|
|
hsb->nls_io = load_nls(p);
|
|
if (!hsb->nls_io) {
|
|
pr_err("unable to load iocharset \"%s\"\n", p);
|
|
kfree(p);
|
|
return 0;
|
|
}
|
|
kfree(p);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (hsb->nls_disk && !hsb->nls_io) {
|
|
hsb->nls_io = load_nls_default();
|
|
if (!hsb->nls_io) {
|
|
pr_err("unable to load default iocharset\n");
|
|
return 0;
|
|
}
|
|
}
|
|
hsb->s_dir_umask &= 0777;
|
|
hsb->s_file_umask &= 0577;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* hfs_read_super()
|
|
*
|
|
* This is the function that is responsible for mounting an HFS
|
|
* filesystem. It performs all the tasks necessary to get enough data
|
|
* from the disk to read the root inode. This includes parsing the
|
|
* mount options, dealing with Macintosh partitions, reading the
|
|
* superblock and the allocation bitmap blocks, calling
|
|
* hfs_btree_init() to get the necessary data about the extents and
|
|
* catalog B-trees and, finally, reading the root inode into memory.
|
|
*/
|
|
static int hfs_fill_super(struct super_block *sb, void *data, int silent)
|
|
{
|
|
struct hfs_sb_info *sbi;
|
|
struct hfs_find_data fd;
|
|
hfs_cat_rec rec;
|
|
struct inode *root_inode;
|
|
int res;
|
|
|
|
sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
|
|
if (!sbi)
|
|
return -ENOMEM;
|
|
|
|
sbi->sb = sb;
|
|
sb->s_fs_info = sbi;
|
|
spin_lock_init(&sbi->work_lock);
|
|
INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
|
|
|
|
res = -EINVAL;
|
|
if (!parse_options((char *)data, sbi)) {
|
|
pr_err("unable to parse mount options\n");
|
|
goto bail;
|
|
}
|
|
|
|
sb->s_op = &hfs_super_operations;
|
|
sb->s_xattr = hfs_xattr_handlers;
|
|
sb->s_flags |= SB_NODIRATIME;
|
|
mutex_init(&sbi->bitmap_lock);
|
|
|
|
res = hfs_mdb_get(sb);
|
|
if (res) {
|
|
if (!silent)
|
|
pr_warn("can't find a HFS filesystem on dev %s\n",
|
|
hfs_mdb_name(sb));
|
|
res = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
/* try to get the root inode */
|
|
res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
|
|
if (res)
|
|
goto bail_no_root;
|
|
res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
|
|
if (!res) {
|
|
if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
|
|
res = -EIO;
|
|
goto bail_hfs_find;
|
|
}
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
|
|
}
|
|
if (res)
|
|
goto bail_hfs_find;
|
|
res = -EINVAL;
|
|
root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
|
|
hfs_find_exit(&fd);
|
|
if (!root_inode)
|
|
goto bail_no_root;
|
|
|
|
sb->s_d_op = &hfs_dentry_operations;
|
|
res = -ENOMEM;
|
|
sb->s_root = d_make_root(root_inode);
|
|
if (!sb->s_root)
|
|
goto bail_no_root;
|
|
|
|
/* everything's okay */
|
|
return 0;
|
|
|
|
bail_hfs_find:
|
|
hfs_find_exit(&fd);
|
|
bail_no_root:
|
|
pr_err("get root inode failed\n");
|
|
bail:
|
|
hfs_mdb_put(sb);
|
|
return res;
|
|
}
|
|
|
|
static struct dentry *hfs_mount(struct file_system_type *fs_type,
|
|
int flags, const char *dev_name, void *data)
|
|
{
|
|
return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super);
|
|
}
|
|
|
|
static struct file_system_type hfs_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "hfs",
|
|
.mount = hfs_mount,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
};
|
|
MODULE_ALIAS_FS("hfs");
|
|
|
|
static void hfs_init_once(void *p)
|
|
{
|
|
struct hfs_inode_info *i = p;
|
|
|
|
inode_init_once(&i->vfs_inode);
|
|
}
|
|
|
|
static int __init init_hfs_fs(void)
|
|
{
|
|
int err;
|
|
|
|
hfs_inode_cachep = kmem_cache_create("hfs_inode_cache",
|
|
sizeof(struct hfs_inode_info), 0,
|
|
SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, hfs_init_once);
|
|
if (!hfs_inode_cachep)
|
|
return -ENOMEM;
|
|
err = register_filesystem(&hfs_fs_type);
|
|
if (err)
|
|
kmem_cache_destroy(hfs_inode_cachep);
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_hfs_fs(void)
|
|
{
|
|
unregister_filesystem(&hfs_fs_type);
|
|
|
|
/*
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
* destroy cache.
|
|
*/
|
|
rcu_barrier();
|
|
kmem_cache_destroy(hfs_inode_cachep);
|
|
}
|
|
|
|
module_init(init_hfs_fs)
|
|
module_exit(exit_hfs_fs)
|