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f2fs: return writeback error from collapse range

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f2fs_collapse_range() writes back pages moved by f2fs_do_collapse(),
but ignores the return value. If writeback fails, the ioctl can still
truncate page cache, shrink blocks, and report success.

Return the error before truncating page cache or updating the file size.

Fixes: b4ace33703 ("f2fs: support FALLOC_FL_COLLAPSE_RANGE")
Cc: stable@kernel.org
Assisted-by: Codex:gpt-5.5
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Wenjie Qi 2026-07-27 15:49:10 +08:00 committed by Jaegeuk Kim
parent 8517133274
commit f8a4108800
1 changed files with 4 additions and 1 deletions
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5
fs/f2fs/file.c
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@ -1623,11 +1623,14 @@ static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
/* write out all moved pages, if possible */
filemap_invalidate_lock(inode->i_mapping);
filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
if (ret)
goto out_unlock;
truncate_pagecache(inode, offset);
new_size = i_size_read(inode) - len;
ret = f2fs_truncate_blocks(inode, new_size, true);
out_unlock:
filemap_invalidate_unlock(inode->i_mapping);
if (!ret)
f2fs_i_size_write(inode, new_size);