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f2fs: introduce FAULT_NO_SEGMENT

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Use it to simulate no free segment case during block allocation.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2024-02-22 20:18:51 +08:00 committed by Jaegeuk Kim
parent ea59b12ac6
commit 8b10d36537
5 changed files with 9 additions and 0 deletions
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1
Documentation/ABI/testing/sysfs-fs-f2fs
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@ -724,6 +724,7 @@ Description: Support configuring fault injection type, should be
FAULT_LOCK_OP 0x000020000 FAULT_LOCK_OP 0x000020000
FAULT_BLKADDR_VALIDITY 0x000040000 FAULT_BLKADDR_VALIDITY 0x000040000
FAULT_BLKADDR_CONSISTENCE 0x000080000 FAULT_BLKADDR_CONSISTENCE 0x000080000
FAULT_NO_SEGMENT 0x000100000
=========================== =========== =========================== ===========
What: /sys/fs/f2fs/<disk>/discard_io_aware_gran What: /sys/fs/f2fs/<disk>/discard_io_aware_gran

1
Documentation/filesystems/f2fs.rst
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@ -205,6 +205,7 @@ fault_type=%d Support configuring fault injection type, should be
FAULT_LOCK_OP 0x000020000 FAULT_LOCK_OP 0x000020000
FAULT_BLKADDR_VALIDITY 0x000040000 FAULT_BLKADDR_VALIDITY 0x000040000
FAULT_BLKADDR_CONSISTENCE 0x000080000 FAULT_BLKADDR_CONSISTENCE 0x000080000
FAULT_NO_SEGMENT 0x000100000
=========================== =========== =========================== ===========
mode=%s Control block allocation mode which supports "adaptive" mode=%s Control block allocation mode which supports "adaptive"
and "lfs". In "lfs" mode, there should be no random and "lfs". In "lfs" mode, there should be no random

1
fs/f2fs/f2fs.h
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@ -62,6 +62,7 @@ enum {
FAULT_LOCK_OP, FAULT_LOCK_OP,
FAULT_BLKADDR_VALIDITY, FAULT_BLKADDR_VALIDITY,
FAULT_BLKADDR_CONSISTENCE, FAULT_BLKADDR_CONSISTENCE,
FAULT_NO_SEGMENT,
FAULT_MAX, FAULT_MAX,
}; };

5
fs/f2fs/segment.c
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@ -2656,6 +2656,11 @@ static int get_new_segment(struct f2fs_sb_info *sbi,
spin_lock(&free_i->segmap_lock); spin_lock(&free_i->segmap_lock);
if (time_to_inject(sbi, FAULT_NO_SEGMENT)) {
ret = -ENOSPC;
goto out_unlock;
}
if (!new_sec && ((*newseg + 1) % SEGS_PER_SEC(sbi))) { if (!new_sec && ((*newseg + 1) % SEGS_PER_SEC(sbi))) {
segno = find_next_zero_bit(free_i->free_segmap, segno = find_next_zero_bit(free_i->free_segmap,
GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1); GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);

1
fs/f2fs/super.c
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@ -63,6 +63,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_LOCK_OP] = "lock_op", [FAULT_LOCK_OP] = "lock_op",
[FAULT_BLKADDR_VALIDITY] = "invalid blkaddr", [FAULT_BLKADDR_VALIDITY] = "invalid blkaddr",
[FAULT_BLKADDR_CONSISTENCE] = "inconsistent blkaddr", [FAULT_BLKADDR_CONSISTENCE] = "inconsistent blkaddr",
[FAULT_NO_SEGMENT] = "no free segment",
}; };
void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate, void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,