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668c955155
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
1020 lines
26 KiB
C
1020 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef NO_BCACHEFS_FS
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#include "bcachefs.h"
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#include "alloc_foreground.h"
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#include "bkey_buf.h"
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#include "btree_update.h"
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#include "buckets.h"
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#include "clock.h"
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#include "error.h"
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#include "extents.h"
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#include "extent_update.h"
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#include "fs.h"
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#include "fs-io.h"
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#include "fs-io-buffered.h"
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#include "fs-io-pagecache.h"
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#include "fsck.h"
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#include "inode.h"
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#include "journal.h"
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#include "io_misc.h"
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#include "keylist.h"
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#include "quota.h"
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#include "reflink.h"
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#include "trace.h"
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#include <linux/aio.h>
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#include <linux/backing-dev.h>
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#include <linux/falloc.h>
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#include <linux/migrate.h>
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#include <linux/mmu_context.h>
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#include <linux/pagevec.h>
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#include <linux/rmap.h>
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#include <linux/sched/signal.h>
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#include <linux/task_io_accounting_ops.h>
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#include <linux/uio.h>
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#include <trace/events/writeback.h>
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struct nocow_flush {
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struct closure *cl;
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struct bch_dev *ca;
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struct bio bio;
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};
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static void nocow_flush_endio(struct bio *_bio)
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{
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struct nocow_flush *bio = container_of(_bio, struct nocow_flush, bio);
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closure_put(bio->cl);
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percpu_ref_put(&bio->ca->io_ref);
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bio_put(&bio->bio);
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}
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void bch2_inode_flush_nocow_writes_async(struct bch_fs *c,
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struct bch_inode_info *inode,
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struct closure *cl)
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{
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struct nocow_flush *bio;
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struct bch_dev *ca;
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struct bch_devs_mask devs;
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unsigned dev;
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dev = find_first_bit(inode->ei_devs_need_flush.d, BCH_SB_MEMBERS_MAX);
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if (dev == BCH_SB_MEMBERS_MAX)
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return;
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devs = inode->ei_devs_need_flush;
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memset(&inode->ei_devs_need_flush, 0, sizeof(inode->ei_devs_need_flush));
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for_each_set_bit(dev, devs.d, BCH_SB_MEMBERS_MAX) {
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rcu_read_lock();
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ca = rcu_dereference(c->devs[dev]);
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if (ca && !percpu_ref_tryget(&ca->io_ref))
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ca = NULL;
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rcu_read_unlock();
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if (!ca)
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continue;
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bio = container_of(bio_alloc_bioset(ca->disk_sb.bdev, 0,
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REQ_OP_WRITE|REQ_PREFLUSH,
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GFP_KERNEL,
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&c->nocow_flush_bioset),
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struct nocow_flush, bio);
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bio->cl = cl;
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bio->ca = ca;
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bio->bio.bi_end_io = nocow_flush_endio;
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closure_bio_submit(&bio->bio, cl);
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}
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}
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static int bch2_inode_flush_nocow_writes(struct bch_fs *c,
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struct bch_inode_info *inode)
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{
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struct closure cl;
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closure_init_stack(&cl);
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bch2_inode_flush_nocow_writes_async(c, inode, &cl);
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closure_sync(&cl);
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return 0;
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}
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/* i_size updates: */
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struct inode_new_size {
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loff_t new_size;
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u64 now;
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unsigned fields;
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};
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static int inode_set_size(struct btree_trans *trans,
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struct bch_inode_info *inode,
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struct bch_inode_unpacked *bi,
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void *p)
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{
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struct inode_new_size *s = p;
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bi->bi_size = s->new_size;
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if (s->fields & ATTR_ATIME)
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bi->bi_atime = s->now;
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if (s->fields & ATTR_MTIME)
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bi->bi_mtime = s->now;
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if (s->fields & ATTR_CTIME)
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bi->bi_ctime = s->now;
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return 0;
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}
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int __must_check bch2_write_inode_size(struct bch_fs *c,
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struct bch_inode_info *inode,
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loff_t new_size, unsigned fields)
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{
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struct inode_new_size s = {
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.new_size = new_size,
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.now = bch2_current_time(c),
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.fields = fields,
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};
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return bch2_write_inode(c, inode, inode_set_size, &s, fields);
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}
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void __bch2_i_sectors_acct(struct bch_fs *c, struct bch_inode_info *inode,
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struct quota_res *quota_res, s64 sectors)
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{
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bch2_fs_inconsistent_on((s64) inode->v.i_blocks + sectors < 0, c,
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"inode %lu i_blocks underflow: %llu + %lli < 0 (ondisk %lli)",
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inode->v.i_ino, (u64) inode->v.i_blocks, sectors,
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inode->ei_inode.bi_sectors);
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inode->v.i_blocks += sectors;
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#ifdef CONFIG_BCACHEFS_QUOTA
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if (quota_res &&
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!test_bit(EI_INODE_SNAPSHOT, &inode->ei_flags) &&
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sectors > 0) {
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BUG_ON(sectors > quota_res->sectors);
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BUG_ON(sectors > inode->ei_quota_reserved);
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quota_res->sectors -= sectors;
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inode->ei_quota_reserved -= sectors;
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} else {
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bch2_quota_acct(c, inode->ei_qid, Q_SPC, sectors, KEY_TYPE_QUOTA_WARN);
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}
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#endif
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}
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/* fsync: */
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/*
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* inode->ei_inode.bi_journal_seq won't be up to date since it's set in an
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* insert trigger: look up the btree inode instead
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*/
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static int bch2_flush_inode(struct bch_fs *c,
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struct bch_inode_info *inode)
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{
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if (c->opts.journal_flush_disabled)
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return 0;
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if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_fsync))
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return -EROFS;
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struct bch_inode_unpacked u;
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int ret = bch2_inode_find_by_inum(c, inode_inum(inode), &u) ?:
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bch2_journal_flush_seq(&c->journal, u.bi_journal_seq) ?:
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bch2_inode_flush_nocow_writes(c, inode);
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bch2_write_ref_put(c, BCH_WRITE_REF_fsync);
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return ret;
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}
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int bch2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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{
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struct bch_inode_info *inode = file_bch_inode(file);
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struct bch_fs *c = inode->v.i_sb->s_fs_info;
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int ret, err;
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trace_bch2_fsync(file, datasync);
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ret = file_write_and_wait_range(file, start, end);
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if (ret)
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goto out;
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ret = sync_inode_metadata(&inode->v, 1);
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if (ret)
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goto out;
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ret = bch2_flush_inode(c, inode);
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out:
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ret = bch2_err_class(ret);
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if (ret == -EROFS)
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ret = -EIO;
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err = file_check_and_advance_wb_err(file);
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if (!ret)
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ret = err;
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return ret;
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}
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/* truncate: */
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static inline int range_has_data(struct bch_fs *c, u32 subvol,
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struct bpos start,
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struct bpos end)
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{
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return bch2_trans_run(c,
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for_each_btree_key_in_subvolume_upto(trans, iter, BTREE_ID_extents, start, end,
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subvol, 0, k, ({
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bkey_extent_is_data(k.k) && !bkey_extent_is_unwritten(k);
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})));
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}
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static int __bch2_truncate_folio(struct bch_inode_info *inode,
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pgoff_t index, loff_t start, loff_t end)
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{
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struct bch_fs *c = inode->v.i_sb->s_fs_info;
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struct address_space *mapping = inode->v.i_mapping;
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struct bch_folio *s;
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unsigned start_offset;
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unsigned end_offset;
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unsigned i;
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struct folio *folio;
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s64 i_sectors_delta = 0;
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int ret = 0;
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u64 end_pos;
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folio = filemap_lock_folio(mapping, index);
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if (IS_ERR_OR_NULL(folio)) {
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/*
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* XXX: we're doing two index lookups when we end up reading the
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* folio
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*/
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ret = range_has_data(c, inode->ei_inum.subvol,
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POS(inode->v.i_ino, (index << PAGE_SECTORS_SHIFT)),
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POS(inode->v.i_ino, (index << PAGE_SECTORS_SHIFT) + PAGE_SECTORS));
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if (ret <= 0)
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return ret;
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folio = __filemap_get_folio(mapping, index,
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FGP_LOCK|FGP_CREAT, GFP_KERNEL);
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if (IS_ERR_OR_NULL(folio)) {
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ret = -ENOMEM;
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goto out;
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}
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}
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BUG_ON(start >= folio_end_pos(folio));
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BUG_ON(end <= folio_pos(folio));
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start_offset = max(start, folio_pos(folio)) - folio_pos(folio);
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end_offset = min_t(u64, end, folio_end_pos(folio)) - folio_pos(folio);
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/* Folio boundary? Nothing to do */
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if (start_offset == 0 &&
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end_offset == folio_size(folio)) {
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ret = 0;
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goto unlock;
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}
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s = bch2_folio_create(folio, 0);
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if (!s) {
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ret = -ENOMEM;
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goto unlock;
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}
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if (!folio_test_uptodate(folio)) {
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ret = bch2_read_single_folio(folio, mapping);
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if (ret)
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goto unlock;
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}
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ret = bch2_folio_set(c, inode_inum(inode), &folio, 1);
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if (ret)
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goto unlock;
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for (i = round_up(start_offset, block_bytes(c)) >> 9;
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i < round_down(end_offset, block_bytes(c)) >> 9;
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i++) {
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s->s[i].nr_replicas = 0;
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i_sectors_delta -= s->s[i].state == SECTOR_dirty;
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bch2_folio_sector_set(folio, s, i, SECTOR_unallocated);
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}
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bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
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/*
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* Caller needs to know whether this folio will be written out by
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* writeback - doing an i_size update if necessary - or whether it will
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* be responsible for the i_size update.
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*
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* Note that we shouldn't ever see a folio beyond EOF, but check and
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* warn if so. This has been observed by failure to clean up folios
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* after a short write and there's still a chance reclaim will fix
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* things up.
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*/
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WARN_ON_ONCE(folio_pos(folio) >= inode->v.i_size);
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end_pos = folio_end_pos(folio);
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if (inode->v.i_size > folio_pos(folio))
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end_pos = min_t(u64, inode->v.i_size, end_pos);
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ret = s->s[folio_pos_to_s(folio, end_pos - 1)].state >= SECTOR_dirty;
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folio_zero_segment(folio, start_offset, end_offset);
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/*
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* Bit of a hack - we don't want truncate to fail due to -ENOSPC.
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*
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* XXX: because we aren't currently tracking whether the folio has actual
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* data in it (vs. just 0s, or only partially written) this wrong. ick.
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*/
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BUG_ON(bch2_get_folio_disk_reservation(c, inode, folio, false));
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/*
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* This removes any writeable userspace mappings; we need to force
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* .page_mkwrite to be called again before any mmapped writes, to
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* redirty the full page:
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*/
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folio_mkclean(folio);
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filemap_dirty_folio(mapping, folio);
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unlock:
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folio_unlock(folio);
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folio_put(folio);
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out:
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return ret;
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}
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static int bch2_truncate_folio(struct bch_inode_info *inode, loff_t from)
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{
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return __bch2_truncate_folio(inode, from >> PAGE_SHIFT,
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from, ANYSINT_MAX(loff_t));
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}
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static int bch2_truncate_folios(struct bch_inode_info *inode,
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loff_t start, loff_t end)
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{
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int ret = __bch2_truncate_folio(inode, start >> PAGE_SHIFT,
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start, end);
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if (ret >= 0 &&
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start >> PAGE_SHIFT != end >> PAGE_SHIFT)
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ret = __bch2_truncate_folio(inode,
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(end - 1) >> PAGE_SHIFT,
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start, end);
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return ret;
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}
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static int bch2_extend(struct mnt_idmap *idmap,
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struct bch_inode_info *inode,
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struct bch_inode_unpacked *inode_u,
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struct iattr *iattr)
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{
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struct address_space *mapping = inode->v.i_mapping;
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int ret;
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|
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/*
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* sync appends:
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*
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* this has to be done _before_ extending i_size:
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*/
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ret = filemap_write_and_wait_range(mapping, inode_u->bi_size, S64_MAX);
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if (ret)
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return ret;
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truncate_setsize(&inode->v, iattr->ia_size);
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return bch2_setattr_nonsize(idmap, inode, iattr);
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}
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|
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int bchfs_truncate(struct mnt_idmap *idmap,
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struct bch_inode_info *inode, struct iattr *iattr)
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{
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struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
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struct address_space *mapping = inode->v.i_mapping;
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struct bch_inode_unpacked inode_u;
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s64 i_sectors_delta = 0;
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int ret = 0;
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|
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/*
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* If the truncate call with change the size of the file, the
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* cmtimes should be updated. If the size will not change, we
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* do not need to update the cmtimes.
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*/
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if (iattr->ia_size != inode->v.i_size) {
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if (!(iattr->ia_valid & ATTR_MTIME))
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ktime_get_coarse_real_ts64(&iattr->ia_mtime);
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if (!(iattr->ia_valid & ATTR_CTIME))
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ktime_get_coarse_real_ts64(&iattr->ia_ctime);
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iattr->ia_valid |= ATTR_MTIME|ATTR_CTIME;
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}
|
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|
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inode_dio_wait(&inode->v);
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bch2_pagecache_block_get(inode);
|
|
|
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ret = bch2_inode_find_by_inum(c, inode_inum(inode), &inode_u);
|
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if (ret)
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goto err;
|
|
|
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/*
|
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* check this before next assertion; on filesystem error our normal
|
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* invariants are a bit broken (truncate has to truncate the page cache
|
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* before the inode).
|
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*/
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ret = bch2_journal_error(&c->journal);
|
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if (ret)
|
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goto err;
|
|
|
|
WARN_ONCE(!test_bit(EI_INODE_ERROR, &inode->ei_flags) &&
|
|
inode->v.i_size < inode_u.bi_size,
|
|
"truncate spotted in mem i_size < btree i_size: %llu < %llu\n",
|
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(u64) inode->v.i_size, inode_u.bi_size);
|
|
|
|
if (iattr->ia_size > inode->v.i_size) {
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ret = bch2_extend(idmap, inode, &inode_u, iattr);
|
|
goto err;
|
|
}
|
|
|
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iattr->ia_valid &= ~ATTR_SIZE;
|
|
|
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ret = bch2_truncate_folio(inode, iattr->ia_size);
|
|
if (unlikely(ret < 0))
|
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goto err;
|
|
|
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truncate_setsize(&inode->v, iattr->ia_size);
|
|
|
|
/*
|
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* When extending, we're going to write the new i_size to disk
|
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* immediately so we need to flush anything above the current on disk
|
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* i_size first:
|
|
*
|
|
* Also, when extending we need to flush the page that i_size currently
|
|
* straddles - if it's mapped to userspace, we need to ensure that
|
|
* userspace has to redirty it and call .mkwrite -> set_page_dirty
|
|
* again to allocate the part of the page that was extended.
|
|
*/
|
|
if (iattr->ia_size > inode_u.bi_size)
|
|
ret = filemap_write_and_wait_range(mapping,
|
|
inode_u.bi_size,
|
|
iattr->ia_size - 1);
|
|
else if (iattr->ia_size & (PAGE_SIZE - 1))
|
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ret = filemap_write_and_wait_range(mapping,
|
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round_down(iattr->ia_size, PAGE_SIZE),
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iattr->ia_size - 1);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = bch2_truncate(c, inode_inum(inode), iattr->ia_size, &i_sectors_delta);
|
|
bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
|
|
|
|
if (unlikely(ret)) {
|
|
/*
|
|
* If we error here, VFS caches are now inconsistent with btree
|
|
*/
|
|
set_bit(EI_INODE_ERROR, &inode->ei_flags);
|
|
goto err;
|
|
}
|
|
|
|
bch2_fs_inconsistent_on(!inode->v.i_size && inode->v.i_blocks &&
|
|
!bch2_journal_error(&c->journal), c,
|
|
"inode %lu truncated to 0 but i_blocks %llu (ondisk %lli)",
|
|
inode->v.i_ino, (u64) inode->v.i_blocks,
|
|
inode->ei_inode.bi_sectors);
|
|
|
|
ret = bch2_setattr_nonsize(idmap, inode, iattr);
|
|
err:
|
|
bch2_pagecache_block_put(inode);
|
|
return bch2_err_class(ret);
|
|
}
|
|
|
|
/* fallocate: */
|
|
|
|
static int inode_update_times_fn(struct btree_trans *trans,
|
|
struct bch_inode_info *inode,
|
|
struct bch_inode_unpacked *bi, void *p)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
|
|
bi->bi_mtime = bi->bi_ctime = bch2_current_time(c);
|
|
return 0;
|
|
}
|
|
|
|
static noinline long bchfs_fpunch(struct bch_inode_info *inode, loff_t offset, loff_t len)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
u64 end = offset + len;
|
|
u64 block_start = round_up(offset, block_bytes(c));
|
|
u64 block_end = round_down(end, block_bytes(c));
|
|
bool truncated_last_page;
|
|
int ret = 0;
|
|
|
|
ret = bch2_truncate_folios(inode, offset, end);
|
|
if (unlikely(ret < 0))
|
|
goto err;
|
|
|
|
truncated_last_page = ret;
|
|
|
|
truncate_pagecache_range(&inode->v, offset, end - 1);
|
|
|
|
if (block_start < block_end) {
|
|
s64 i_sectors_delta = 0;
|
|
|
|
ret = bch2_fpunch(c, inode_inum(inode),
|
|
block_start >> 9, block_end >> 9,
|
|
&i_sectors_delta);
|
|
bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
|
|
}
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
|
if (end >= inode->v.i_size && !truncated_last_page) {
|
|
ret = bch2_write_inode_size(c, inode, inode->v.i_size,
|
|
ATTR_MTIME|ATTR_CTIME);
|
|
} else {
|
|
ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
|
|
ATTR_MTIME|ATTR_CTIME);
|
|
}
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static noinline long bchfs_fcollapse_finsert(struct bch_inode_info *inode,
|
|
loff_t offset, loff_t len,
|
|
bool insert)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
struct address_space *mapping = inode->v.i_mapping;
|
|
s64 i_sectors_delta = 0;
|
|
int ret = 0;
|
|
|
|
if ((offset | len) & (block_bytes(c) - 1))
|
|
return -EINVAL;
|
|
|
|
if (insert) {
|
|
if (offset >= inode->v.i_size)
|
|
return -EINVAL;
|
|
} else {
|
|
if (offset + len >= inode->v.i_size)
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = bch2_write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (insert)
|
|
i_size_write(&inode->v, inode->v.i_size + len);
|
|
|
|
ret = bch2_fcollapse_finsert(c, inode_inum(inode), offset >> 9, len >> 9,
|
|
insert, &i_sectors_delta);
|
|
if (!ret && !insert)
|
|
i_size_write(&inode->v, inode->v.i_size - len);
|
|
bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static noinline int __bchfs_fallocate(struct bch_inode_info *inode, int mode,
|
|
u64 start_sector, u64 end_sector)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
struct btree_trans *trans = bch2_trans_get(c);
|
|
struct btree_iter iter;
|
|
struct bpos end_pos = POS(inode->v.i_ino, end_sector);
|
|
struct bch_io_opts opts;
|
|
int ret = 0;
|
|
|
|
bch2_inode_opts_get(&opts, c, &inode->ei_inode);
|
|
|
|
bch2_trans_iter_init(trans, &iter, BTREE_ID_extents,
|
|
POS(inode->v.i_ino, start_sector),
|
|
BTREE_ITER_slots|BTREE_ITER_intent);
|
|
|
|
while (!ret && bkey_lt(iter.pos, end_pos)) {
|
|
s64 i_sectors_delta = 0;
|
|
struct quota_res quota_res = { 0 };
|
|
struct bkey_s_c k;
|
|
unsigned sectors;
|
|
bool is_allocation;
|
|
u64 hole_start, hole_end;
|
|
u32 snapshot;
|
|
|
|
bch2_trans_begin(trans);
|
|
|
|
ret = bch2_subvolume_get_snapshot(trans,
|
|
inode->ei_inum.subvol, &snapshot);
|
|
if (ret)
|
|
goto bkey_err;
|
|
|
|
bch2_btree_iter_set_snapshot(&iter, snapshot);
|
|
|
|
k = bch2_btree_iter_peek_slot(&iter);
|
|
if ((ret = bkey_err(k)))
|
|
goto bkey_err;
|
|
|
|
hole_start = iter.pos.offset;
|
|
hole_end = bpos_min(k.k->p, end_pos).offset;
|
|
is_allocation = bkey_extent_is_allocation(k.k);
|
|
|
|
/* already reserved */
|
|
if (bkey_extent_is_reservation(k) &&
|
|
bch2_bkey_nr_ptrs_fully_allocated(k) >= opts.data_replicas) {
|
|
bch2_btree_iter_advance(&iter);
|
|
continue;
|
|
}
|
|
|
|
if (bkey_extent_is_data(k.k) &&
|
|
!(mode & FALLOC_FL_ZERO_RANGE)) {
|
|
bch2_btree_iter_advance(&iter);
|
|
continue;
|
|
}
|
|
|
|
if (!(mode & FALLOC_FL_ZERO_RANGE)) {
|
|
/*
|
|
* Lock ordering - can't be holding btree locks while
|
|
* blocking on a folio lock:
|
|
*/
|
|
if (bch2_clamp_data_hole(&inode->v,
|
|
&hole_start,
|
|
&hole_end,
|
|
opts.data_replicas, true))
|
|
ret = drop_locks_do(trans,
|
|
(bch2_clamp_data_hole(&inode->v,
|
|
&hole_start,
|
|
&hole_end,
|
|
opts.data_replicas, false), 0));
|
|
bch2_btree_iter_set_pos(&iter, POS(iter.pos.inode, hole_start));
|
|
|
|
if (ret)
|
|
goto bkey_err;
|
|
|
|
if (hole_start == hole_end)
|
|
continue;
|
|
}
|
|
|
|
sectors = hole_end - hole_start;
|
|
|
|
if (!is_allocation) {
|
|
ret = bch2_quota_reservation_add(c, inode,
|
|
"a_res, sectors, true);
|
|
if (unlikely(ret))
|
|
goto bkey_err;
|
|
}
|
|
|
|
ret = bch2_extent_fallocate(trans, inode_inum(inode), &iter,
|
|
sectors, opts, &i_sectors_delta,
|
|
writepoint_hashed((unsigned long) current));
|
|
if (ret)
|
|
goto bkey_err;
|
|
|
|
bch2_i_sectors_acct(c, inode, "a_res, i_sectors_delta);
|
|
|
|
if (bch2_mark_pagecache_reserved(inode, &hole_start,
|
|
iter.pos.offset, true))
|
|
drop_locks_do(trans,
|
|
bch2_mark_pagecache_reserved(inode, &hole_start,
|
|
iter.pos.offset, false));
|
|
bkey_err:
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
|
if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
|
|
ret = 0;
|
|
}
|
|
|
|
if (bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE)) {
|
|
struct quota_res quota_res = { 0 };
|
|
s64 i_sectors_delta = 0;
|
|
|
|
bch2_fpunch_at(trans, &iter, inode_inum(inode),
|
|
end_sector, &i_sectors_delta);
|
|
bch2_i_sectors_acct(c, inode, "a_res, i_sectors_delta);
|
|
bch2_quota_reservation_put(c, inode, "a_res);
|
|
}
|
|
|
|
bch2_trans_iter_exit(trans, &iter);
|
|
bch2_trans_put(trans);
|
|
return ret;
|
|
}
|
|
|
|
static noinline long bchfs_fallocate(struct bch_inode_info *inode, int mode,
|
|
loff_t offset, loff_t len)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
u64 end = offset + len;
|
|
u64 block_start = round_down(offset, block_bytes(c));
|
|
u64 block_end = round_up(end, block_bytes(c));
|
|
bool truncated_last_page = false;
|
|
int ret, ret2 = 0;
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) && end > inode->v.i_size) {
|
|
ret = inode_newsize_ok(&inode->v, end);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (mode & FALLOC_FL_ZERO_RANGE) {
|
|
ret = bch2_truncate_folios(inode, offset, end);
|
|
if (unlikely(ret < 0))
|
|
return ret;
|
|
|
|
truncated_last_page = ret;
|
|
|
|
truncate_pagecache_range(&inode->v, offset, end - 1);
|
|
|
|
block_start = round_up(offset, block_bytes(c));
|
|
block_end = round_down(end, block_bytes(c));
|
|
}
|
|
|
|
ret = __bchfs_fallocate(inode, mode, block_start >> 9, block_end >> 9);
|
|
|
|
/*
|
|
* On -ENOSPC in ZERO_RANGE mode, we still want to do the inode update,
|
|
* so that the VFS cache i_size is consistent with the btree i_size:
|
|
*/
|
|
if (ret &&
|
|
!(bch2_err_matches(ret, ENOSPC) && (mode & FALLOC_FL_ZERO_RANGE)))
|
|
return ret;
|
|
|
|
if (mode & FALLOC_FL_KEEP_SIZE && end > inode->v.i_size)
|
|
end = inode->v.i_size;
|
|
|
|
if (end >= inode->v.i_size &&
|
|
(((mode & FALLOC_FL_ZERO_RANGE) && !truncated_last_page) ||
|
|
!(mode & FALLOC_FL_KEEP_SIZE))) {
|
|
spin_lock(&inode->v.i_lock);
|
|
i_size_write(&inode->v, end);
|
|
spin_unlock(&inode->v.i_lock);
|
|
|
|
mutex_lock(&inode->ei_update_lock);
|
|
ret2 = bch2_write_inode_size(c, inode, end, 0);
|
|
mutex_unlock(&inode->ei_update_lock);
|
|
}
|
|
|
|
return ret ?: ret2;
|
|
}
|
|
|
|
long bch2_fallocate_dispatch(struct file *file, int mode,
|
|
loff_t offset, loff_t len)
|
|
{
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
long ret;
|
|
|
|
if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_fallocate))
|
|
return -EROFS;
|
|
|
|
inode_lock(&inode->v);
|
|
inode_dio_wait(&inode->v);
|
|
bch2_pagecache_block_get(inode);
|
|
|
|
ret = file_modified(file);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (!(mode & ~(FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE)))
|
|
ret = bchfs_fallocate(inode, mode, offset, len);
|
|
else if (mode == (FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE))
|
|
ret = bchfs_fpunch(inode, offset, len);
|
|
else if (mode == FALLOC_FL_INSERT_RANGE)
|
|
ret = bchfs_fcollapse_finsert(inode, offset, len, true);
|
|
else if (mode == FALLOC_FL_COLLAPSE_RANGE)
|
|
ret = bchfs_fcollapse_finsert(inode, offset, len, false);
|
|
else
|
|
ret = -EOPNOTSUPP;
|
|
err:
|
|
bch2_pagecache_block_put(inode);
|
|
inode_unlock(&inode->v);
|
|
bch2_write_ref_put(c, BCH_WRITE_REF_fallocate);
|
|
|
|
return bch2_err_class(ret);
|
|
}
|
|
|
|
/*
|
|
* Take a quota reservation for unallocated blocks in a given file range
|
|
* Does not check pagecache
|
|
*/
|
|
static int quota_reserve_range(struct bch_inode_info *inode,
|
|
struct quota_res *res,
|
|
u64 start, u64 end)
|
|
{
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
u64 sectors = end - start;
|
|
|
|
int ret = bch2_trans_run(c,
|
|
for_each_btree_key_in_subvolume_upto(trans, iter,
|
|
BTREE_ID_extents,
|
|
POS(inode->v.i_ino, start),
|
|
POS(inode->v.i_ino, end - 1),
|
|
inode->ei_inum.subvol, 0, k, ({
|
|
if (bkey_extent_is_allocation(k.k)) {
|
|
u64 s = min(end, k.k->p.offset) -
|
|
max(start, bkey_start_offset(k.k));
|
|
BUG_ON(s > sectors);
|
|
sectors -= s;
|
|
}
|
|
|
|
0;
|
|
})));
|
|
|
|
return ret ?: bch2_quota_reservation_add(c, inode, res, sectors, true);
|
|
}
|
|
|
|
loff_t bch2_remap_file_range(struct file *file_src, loff_t pos_src,
|
|
struct file *file_dst, loff_t pos_dst,
|
|
loff_t len, unsigned remap_flags)
|
|
{
|
|
struct bch_inode_info *src = file_bch_inode(file_src);
|
|
struct bch_inode_info *dst = file_bch_inode(file_dst);
|
|
struct bch_fs *c = src->v.i_sb->s_fs_info;
|
|
struct quota_res quota_res = { 0 };
|
|
s64 i_sectors_delta = 0;
|
|
u64 aligned_len;
|
|
loff_t ret = 0;
|
|
|
|
if (remap_flags & ~(REMAP_FILE_DEDUP|REMAP_FILE_ADVISORY))
|
|
return -EINVAL;
|
|
|
|
if ((pos_src & (block_bytes(c) - 1)) ||
|
|
(pos_dst & (block_bytes(c) - 1)))
|
|
return -EINVAL;
|
|
|
|
if (src == dst &&
|
|
abs(pos_src - pos_dst) < len)
|
|
return -EINVAL;
|
|
|
|
lock_two_nondirectories(&src->v, &dst->v);
|
|
bch2_lock_inodes(INODE_PAGECACHE_BLOCK, src, dst);
|
|
|
|
inode_dio_wait(&src->v);
|
|
inode_dio_wait(&dst->v);
|
|
|
|
ret = generic_remap_file_range_prep(file_src, pos_src,
|
|
file_dst, pos_dst,
|
|
&len, remap_flags);
|
|
if (ret < 0 || len == 0)
|
|
goto err;
|
|
|
|
aligned_len = round_up((u64) len, block_bytes(c));
|
|
|
|
ret = bch2_write_invalidate_inode_pages_range(dst->v.i_mapping,
|
|
pos_dst, pos_dst + len - 1);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = quota_reserve_range(dst, "a_res, pos_dst >> 9,
|
|
(pos_dst + aligned_len) >> 9);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (!(remap_flags & REMAP_FILE_DEDUP))
|
|
file_update_time(file_dst);
|
|
|
|
bch2_mark_pagecache_unallocated(src, pos_src >> 9,
|
|
(pos_src + aligned_len) >> 9);
|
|
|
|
ret = bch2_remap_range(c,
|
|
inode_inum(dst), pos_dst >> 9,
|
|
inode_inum(src), pos_src >> 9,
|
|
aligned_len >> 9,
|
|
pos_dst + len, &i_sectors_delta);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/*
|
|
* due to alignment, we might have remapped slightly more than requsted
|
|
*/
|
|
ret = min((u64) ret << 9, (u64) len);
|
|
|
|
bch2_i_sectors_acct(c, dst, "a_res, i_sectors_delta);
|
|
|
|
spin_lock(&dst->v.i_lock);
|
|
if (pos_dst + ret > dst->v.i_size)
|
|
i_size_write(&dst->v, pos_dst + ret);
|
|
spin_unlock(&dst->v.i_lock);
|
|
|
|
if ((file_dst->f_flags & (__O_SYNC | O_DSYNC)) ||
|
|
IS_SYNC(file_inode(file_dst)))
|
|
ret = bch2_flush_inode(c, dst);
|
|
err:
|
|
bch2_quota_reservation_put(c, dst, "a_res);
|
|
bch2_unlock_inodes(INODE_PAGECACHE_BLOCK, src, dst);
|
|
unlock_two_nondirectories(&src->v, &dst->v);
|
|
|
|
return bch2_err_class(ret);
|
|
}
|
|
|
|
/* fseek: */
|
|
|
|
static loff_t bch2_seek_data(struct file *file, u64 offset)
|
|
{
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
subvol_inum inum = inode_inum(inode);
|
|
u64 isize, next_data = MAX_LFS_FILESIZE;
|
|
|
|
isize = i_size_read(&inode->v);
|
|
if (offset >= isize)
|
|
return -ENXIO;
|
|
|
|
int ret = bch2_trans_run(c,
|
|
for_each_btree_key_in_subvolume_upto(trans, iter, BTREE_ID_extents,
|
|
POS(inode->v.i_ino, offset >> 9),
|
|
POS(inode->v.i_ino, U64_MAX),
|
|
inum.subvol, 0, k, ({
|
|
if (bkey_extent_is_data(k.k)) {
|
|
next_data = max(offset, bkey_start_offset(k.k) << 9);
|
|
break;
|
|
} else if (k.k->p.offset >> 9 > isize)
|
|
break;
|
|
0;
|
|
})));
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (next_data > offset)
|
|
next_data = bch2_seek_pagecache_data(&inode->v,
|
|
offset, next_data, 0, false);
|
|
|
|
if (next_data >= isize)
|
|
return -ENXIO;
|
|
|
|
return vfs_setpos(file, next_data, MAX_LFS_FILESIZE);
|
|
}
|
|
|
|
static loff_t bch2_seek_hole(struct file *file, u64 offset)
|
|
{
|
|
struct bch_inode_info *inode = file_bch_inode(file);
|
|
struct bch_fs *c = inode->v.i_sb->s_fs_info;
|
|
subvol_inum inum = inode_inum(inode);
|
|
u64 isize, next_hole = MAX_LFS_FILESIZE;
|
|
|
|
isize = i_size_read(&inode->v);
|
|
if (offset >= isize)
|
|
return -ENXIO;
|
|
|
|
int ret = bch2_trans_run(c,
|
|
for_each_btree_key_in_subvolume_upto(trans, iter, BTREE_ID_extents,
|
|
POS(inode->v.i_ino, offset >> 9),
|
|
POS(inode->v.i_ino, U64_MAX),
|
|
inum.subvol, BTREE_ITER_slots, k, ({
|
|
if (k.k->p.inode != inode->v.i_ino) {
|
|
next_hole = bch2_seek_pagecache_hole(&inode->v,
|
|
offset, MAX_LFS_FILESIZE, 0, false);
|
|
break;
|
|
} else if (!bkey_extent_is_data(k.k)) {
|
|
next_hole = bch2_seek_pagecache_hole(&inode->v,
|
|
max(offset, bkey_start_offset(k.k) << 9),
|
|
k.k->p.offset << 9, 0, false);
|
|
|
|
if (next_hole < k.k->p.offset << 9)
|
|
break;
|
|
} else {
|
|
offset = max(offset, bkey_start_offset(k.k) << 9);
|
|
}
|
|
0;
|
|
})));
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (next_hole > isize)
|
|
next_hole = isize;
|
|
|
|
return vfs_setpos(file, next_hole, MAX_LFS_FILESIZE);
|
|
}
|
|
|
|
loff_t bch2_llseek(struct file *file, loff_t offset, int whence)
|
|
{
|
|
loff_t ret;
|
|
|
|
switch (whence) {
|
|
case SEEK_SET:
|
|
case SEEK_CUR:
|
|
case SEEK_END:
|
|
ret = generic_file_llseek(file, offset, whence);
|
|
break;
|
|
case SEEK_DATA:
|
|
ret = bch2_seek_data(file, offset);
|
|
break;
|
|
case SEEK_HOLE:
|
|
ret = bch2_seek_hole(file, offset);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return bch2_err_class(ret);
|
|
}
|
|
|
|
void bch2_fs_fsio_exit(struct bch_fs *c)
|
|
{
|
|
bioset_exit(&c->nocow_flush_bioset);
|
|
}
|
|
|
|
int bch2_fs_fsio_init(struct bch_fs *c)
|
|
{
|
|
if (bioset_init(&c->nocow_flush_bioset,
|
|
1, offsetof(struct nocow_flush, bio), 0))
|
|
return -BCH_ERR_ENOMEM_nocow_flush_bioset_init;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* NO_BCACHEFS_FS */
|