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f2fs: add a proc entry show inject stats

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This patch adds a proc entry named inject_stats to show total injected
count for each fault type.

cat /proc/fs/f2fs/<dev>/inject_stats
fault_type              injected_count
kmalloc                 0
kvmalloc                0
page alloc              0
page get                0
alloc bio(obsolete)     0
alloc nid               0
orphan                  0
no more block           0
too big dir depth       0
evict_inode fail        0
truncate fail           0
read IO error           0
checkpoint error        0
discard error           0
write IO error          0
slab alloc              0
dquot initialize        0
lock_op                 0
invalid blkaddr         0
inconsistent blkaddr    0
no free segment         0
inconsistent footer     0

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2025-03-20 10:22:29 +08:00 committed by Jaegeuk Kim
parent 539d33455f
commit e073e92789
3 changed files with 26 additions and 0 deletions
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3
fs/f2fs/f2fs.h
View File

@ -73,6 +73,8 @@ struct f2fs_fault_info {
atomic_t inject_ops;
int inject_rate;
unsigned int inject_type;
/* Used to account total count of injection for each type */
unsigned int inject_count[FAULT_MAX];
};
extern const char *f2fs_fault_name[FAULT_MAX];
@ -1902,6 +1904,7 @@ static inline bool __time_to_inject(struct f2fs_sb_info *sbi, int type,
atomic_inc(&ffi->inject_ops);
if (atomic_read(&ffi->inject_ops) >= ffi->inject_rate) {
atomic_set(&ffi->inject_ops, 0);
ffi->inject_count[type]++;
f2fs_info_ratelimited(sbi, "inject %s in %s of %pS",
f2fs_fault_name[type], func, parent_func);
return true;

1
fs/f2fs/super.c
View File

@ -47,6 +47,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_KVMALLOC] = "kvmalloc",
[FAULT_PAGE_ALLOC] = "page alloc",
[FAULT_PAGE_GET] = "page get",
[FAULT_ALLOC_BIO] = "alloc bio(obsolete)",
[FAULT_ALLOC_NID] = "alloc nid",
[FAULT_ORPHAN] = "orphan",
[FAULT_BLOCK] = "no more block",

22
fs/f2fs/sysfs.c
View File

@ -1679,6 +1679,24 @@ static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
return 0;
}
#ifdef CONFIG_F2FS_FAULT_INJECTION
static int __maybe_unused inject_stats_seq_show(struct seq_file *seq,
void *offset)
{
struct super_block *sb = seq->private;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
int i;
seq_puts(seq, "fault_type injected_count\n");
for (i = 0; i < FAULT_MAX; i++)
seq_printf(seq, "%-24s%-10u\n", f2fs_fault_name[i],
ffi->inject_count[i]);
return 0;
}
#endif
int __init f2fs_init_sysfs(void)
{
int ret;
@ -1770,6 +1788,10 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
discard_plist_seq_show, sb);
proc_create_single_data("disk_map", 0444, sbi->s_proc,
disk_map_seq_show, sb);
#ifdef CONFIG_F2FS_FAULT_INJECTION
proc_create_single_data("inject_stats", 0444, sbi->s_proc,
inject_stats_seq_show, sb);
#endif
return 0;
put_feature_list_kobj:
kobject_put(&sbi->s_feature_list_kobj);