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f2fs: support fault injection to f2fs_trylock_op()

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f2fs: support fault injection for f2fs_trylock_op()

This patch supports to inject fault into f2fs_trylock_op().

Usage:
a) echo 65536 > /sys/fs/f2fs/<dev>/inject_type or
b) mount -o fault_type=65536 <dev> <mountpoint>

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-12-12 17:17:51 +08:00 committed by Jaegeuk Kim
parent dd9d4a3a30
commit 3e0203893e
3 changed files with 7 additions and 0 deletions
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1
Documentation/filesystems/f2fs.rst
View File

@ -198,6 +198,7 @@ fault_type=%d Support configuring fault injection type, should be
FAULT_WRITE_IO 0x000004000
FAULT_SLAB_ALLOC 0x000008000
FAULT_DQUOT_INIT 0x000010000
FAULT_LOCK_OP 0x000020000
=================== ===========
mode=%s Control block allocation mode which supports "adaptive"
and "lfs". In "lfs" mode, there should be no random

5
fs/f2fs/f2fs.h
View File

@ -56,6 +56,7 @@ enum {
FAULT_WRITE_IO,
FAULT_SLAB_ALLOC,
FAULT_DQUOT_INIT,
FAULT_LOCK_OP,
FAULT_MAX,
};
@ -2095,6 +2096,10 @@ static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
static inline int f2fs_trylock_op(struct f2fs_sb_info *sbi)
{
if (time_to_inject(sbi, FAULT_LOCK_OP)) {
f2fs_show_injection_info(sbi, FAULT_LOCK_OP);
return 0;
}
return down_read_trylock(&sbi->cp_rwsem);
}

1
fs/f2fs/super.c
View File

@ -59,6 +59,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_WRITE_IO] = "write IO error",
[FAULT_SLAB_ALLOC] = "slab alloc",
[FAULT_DQUOT_INIT] = "dquot initialize",
[FAULT_LOCK_OP] = "lock_op",
};
void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,