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f2fs: fix to adjust appropirate defragment pg_end

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A length that exceeds the real size of the inode may be
specified from user, although these out-of-range areas
are not mapped, but they still need to be check in
while loop, which is unnecessary.

Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Zhiguo Niu 2024-03-27 16:53:40 +08:00 committed by Jaegeuk Kim
parent ac5eecf481
commit 197080156f
1 changed files with 7 additions and 5 deletions
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12
fs/f2fs/file.c
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@ -2626,12 +2626,13 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
bool fragmented = false;
int err;
pg_start = range->start >> PAGE_SHIFT;
pg_end = (range->start + range->len) >> PAGE_SHIFT;
f2fs_balance_fs(sbi, true);
inode_lock(inode);
pg_start = range->start >> PAGE_SHIFT;
pg_end = min_t(pgoff_t,
(range->start + range->len) >> PAGE_SHIFT,
DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));
if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
err = -EINVAL;
@ -2646,8 +2647,9 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
}
/* writeback all dirty pages in the range */
err = filemap_write_and_wait_range(inode->i_mapping, range->start,
range->start + range->len - 1);
err = filemap_write_and_wait_range(inode->i_mapping,
pg_start << PAGE_SHIFT,
(pg_end << PAGE_SHIFT) - 1);
if (err)
goto out;