diff options
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 70 |
1 files changed, 65 insertions, 5 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 0e54e84e06e4..9df6d72ff1a1 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -40,8 +40,7 @@ static struct kmem_cache *f2fs_inode_cachep; static struct kset *f2fs_kset; #ifdef CONFIG_F2FS_FAULT_INJECTION -u32 f2fs_fault_rate = 0; -atomic_t f2fs_ops; +struct f2fs_fault_info f2fs_fault; char *fault_name[FAULT_MAX] = { [FAULT_KMALLOC] = "kmalloc", @@ -51,6 +50,17 @@ char *fault_name[FAULT_MAX] = { [FAULT_BLOCK] = "no more block", [FAULT_DIR_DEPTH] = "too big dir depth", }; + +static void f2fs_build_fault_attr(unsigned int rate) +{ + if (rate) { + atomic_set(&f2fs_fault.inject_ops, 0); + f2fs_fault.inject_rate = rate; + f2fs_fault.inject_type = (1 << FAULT_MAX) - 1; + } else { + memset(&f2fs_fault, 0, sizeof(struct f2fs_fault_info)); + } +} #endif /* f2fs-wide shrinker description */ @@ -118,6 +128,10 @@ enum { SM_INFO, /* struct f2fs_sm_info */ NM_INFO, /* struct f2fs_nm_info */ F2FS_SBI, /* struct f2fs_sb_info */ +#ifdef CONFIG_F2FS_FAULT_INJECTION + FAULT_INFO_RATE, /* struct f2fs_fault_info */ + FAULT_INFO_TYPE, /* struct f2fs_fault_info */ +#endif }; struct f2fs_attr { @@ -139,6 +153,11 @@ static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) return (unsigned char *)NM_I(sbi); else if (struct_type == F2FS_SBI) return (unsigned char *)sbi; +#ifdef CONFIG_F2FS_FAULT_INJECTION + else if (struct_type == FAULT_INFO_RATE || + struct_type == FAULT_INFO_TYPE) + return (unsigned char *)&f2fs_fault; +#endif return NULL; } @@ -188,6 +207,10 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a, ret = kstrtoul(skip_spaces(buf), 0, &t); if (ret < 0) return ret; +#ifdef CONFIG_F2FS_FAULT_INJECTION + if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX)) + return -EINVAL; +#endif *ui = t; return count; } @@ -253,6 +276,10 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]); +#ifdef CONFIG_F2FS_FAULT_INJECTION +F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate); +F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); +#endif F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); #define ATTR_LIST(name) (&f2fs_attr_##name.attr) @@ -289,6 +316,22 @@ static struct kobj_type f2fs_ktype = { .release = f2fs_sb_release, }; +#ifdef CONFIG_F2FS_FAULT_INJECTION +/* sysfs for f2fs fault injection */ +static struct kobject f2fs_fault_inject; + +static struct attribute *f2fs_fault_attrs[] = { + ATTR_LIST(inject_rate), + ATTR_LIST(inject_type), + NULL +}; + +static struct kobj_type f2fs_fault_ktype = { + .default_attrs = f2fs_fault_attrs, + .sysfs_ops = &f2fs_attr_ops, +}; +#endif + void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) { struct va_format vaf; @@ -317,8 +360,9 @@ static int parse_options(struct super_block *sb, char *options) int arg = 0; #ifdef CONFIG_F2FS_FAULT_INJECTION - f2fs_fault_rate = 0; + f2fs_build_fault_attr(0); #endif + if (!options) return 0; @@ -456,8 +500,7 @@ static int parse_options(struct super_block *sb, char *options) if (args->from && match_int(args, &arg)) return -EINVAL; #ifdef CONFIG_F2FS_FAULT_INJECTION - f2fs_fault_rate = arg; - atomic_set(&f2fs_ops, 0); + f2fs_build_fault_attr(arg); #else f2fs_msg(sb, KERN_INFO, "FAULT_INJECTION was not selected"); @@ -1797,6 +1840,16 @@ static int __init init_f2fs_fs(void) err = -ENOMEM; goto free_extent_cache; } +#ifdef CONFIG_F2FS_FAULT_INJECTION + f2fs_fault_inject.kset = f2fs_kset; + f2fs_build_fault_attr(0); + err = kobject_init_and_add(&f2fs_fault_inject, &f2fs_fault_ktype, + NULL, "fault_injection"); + if (err) { + f2fs_fault_inject.kset = NULL; + goto free_kset; + } +#endif err = register_shrinker(&f2fs_shrinker_info); if (err) goto free_kset; @@ -1815,6 +1868,10 @@ free_filesystem: free_shrinker: unregister_shrinker(&f2fs_shrinker_info); free_kset: +#ifdef CONFIG_F2FS_FAULT_INJECTION + if (f2fs_fault_inject.kset) + kobject_put(&f2fs_fault_inject); +#endif kset_unregister(f2fs_kset); free_extent_cache: destroy_extent_cache(); @@ -1841,6 +1898,9 @@ static void __exit exit_f2fs_fs(void) destroy_segment_manager_caches(); destroy_node_manager_caches(); destroy_inodecache(); +#ifdef CONFIG_F2FS_FAULT_INJECTION + kobject_put(&f2fs_fault_inject); +#endif kset_unregister(f2fs_kset); f2fs_destroy_trace_ios(); } |
