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f2fs: support IO error injection

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This patch adds to support IO error injection for testing IO error
tolerance of f2fs.

Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
This commit is contained in:
Chao Yu 2016-09-18 23:30:07 +08:00 • committed by Jaegeuk Kim
commit 8b038c70df
3 changed files with 9 additions and 0 deletions
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5
fs/f2fs/data.c
View file

@ -34,6 +34,11 @@ static void f2fs_read_end_io(struct bio *bio)
struct bio_vec *bvec;
int i;
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(FAULT_IO))
bio->bi_error = -EIO;
#endif
if (f2fs_bio_encrypted(bio)) {
if (bio->bi_error) {
fscrypt_release_ctx(bio->bi_private);

3
fs/f2fs/f2fs.h
View file

@ -46,6 +46,7 @@ enum {
FAULT_BLOCK,
FAULT_DIR_DEPTH,
FAULT_EVICT_INODE,
FAULT_IO,
FAULT_MAX,
};
@ -77,6 +78,8 @@ static inline bool time_to_inject(int type)
return false;
else if (type == FAULT_EVICT_INODE && !IS_FAULT_SET(type))
return false;
else if (type == FAULT_IO && !IS_FAULT_SET(type))
return false;
atomic_inc(&f2fs_fault.inject_ops);
if (atomic_read(&f2fs_fault.inject_ops) >= f2fs_fault.inject_rate) {

1
fs/f2fs/super.c
View file

@ -50,6 +50,7 @@ char *fault_name[FAULT_MAX] = {
[FAULT_BLOCK] = "no more block",
[FAULT_DIR_DEPTH] = "too big dir depth",
[FAULT_EVICT_INODE] = "evict_inode fail",
[FAULT_IO] = "IO error",
};
static void f2fs_build_fault_attr(unsigned int rate)