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| author | Chao Yu <chao@kernel.org> | 2025-03-12 17:01:25 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-10 14:44:07 +0200 |
| commit | e14e98ce5205dbb3d2fb81ecf4006929f79b9360 (patch) | |
| tree | febd61a3d8d4587ec898d6a3a22ca41643e3e85d /fs/f2fs | |
| parent | a40276382664500713c18b0ec318214b5a4edb27 (diff) | |
| download | linux-e14e98ce5205dbb3d2fb81ecf4006929f79b9360.tar.gz linux-e14e98ce5205dbb3d2fb81ecf4006929f79b9360.tar.bz2 linux-e14e98ce5205dbb3d2fb81ecf4006929f79b9360.zip | |
f2fs: fix to avoid running out of free segments
[ Upstream commit f7f8932ca6bb22494ef6db671633ad3b4d982271 ]
If checkpoint is disabled, GC can not reclaim any segments, we need
to detect such condition and bail out from fallocate() of a pinfile,
rather than letting allocator running out of free segment, which may
cause f2fs to be shutdown.
reproducer:
mkfs.f2fs -f /dev/vda 16777216
mount -o checkpoint=disable:10% /dev/vda /mnt/f2fs
for ((i=0;i<4096;i++)) do { dd if=/dev/zero of=/mnt/f2fs/$i bs=1M count=1; } done
sync
for ((i=0;i<4096;i+=2)) do { rm /mnt/f2fs/$i; } done
sync
touch /mnt/f2fs/pinfile
f2fs_io pinfile set /mnt/f2fs/pinfile
f2fs_io fallocate 0 0 4201644032 /mnt/f2fs/pinfile
cat /sys/kernel/debug/f2fs/status
output:
- Free: 0 (0)
Fixes: f5a53edcf01e ("f2fs: support aligned pinned file")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 1bb70499ab59..44a658662462 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1836,6 +1836,18 @@ static int f2fs_expand_inode_data(struct inode *inode, loff_t offset, next_alloc: f2fs_down_write(&sbi->pin_sem); + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { + if (has_not_enough_free_secs(sbi, 0, 0)) { + f2fs_up_write(&sbi->pin_sem); + err = -ENOSPC; + f2fs_warn_ratelimited(sbi, + "ino:%lu, start:%lu, end:%lu, need to trigger GC to " + "reclaim enough free segment when checkpoint is enabled", + inode->i_ino, pg_start, pg_end); + goto out_err; + } + } + if (has_not_enough_free_secs(sbi, 0, f2fs_sb_has_blkzoned(sbi) ? ZONED_PIN_SEC_REQUIRED_COUNT : GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) { |