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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-04-29 15:34:32 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-05-07 10:32:22 -0700 |
| commit | 73faec4d99358b79815866dd660ae2f9f6f9110a (patch) | |
| tree | 3127aca2024ac6e03fe8d2f99f27bf36a2996bd9 | |
| parent | 300e129c15f0ed2f94482900a4cb65b28eb09d94 (diff) | |
| download | linux-73faec4d99358b79815866dd660ae2f9f6f9110a.tar.bz2 | |
f2fs: add mount option to select fault injection ratio
This patch adds a mount option to select fault ratio.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/Kconfig | 8 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 19 |
3 files changed, 28 insertions, 0 deletions
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig index 1f8982a957f1..378c221d68a9 100644 --- a/fs/f2fs/Kconfig +++ b/fs/f2fs/Kconfig @@ -94,3 +94,11 @@ config F2FS_IO_TRACE information and block IO patterns in the filesystem level. If unsure, say N. + +config F2FS_FAULT_INJECTION + bool "F2FS fault injection facility" + depends on F2FS_FS + help + Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. + + If unsure, say N. diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 879e4d77a1bc..0cf2a26388e5 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -56,6 +56,7 @@ #define F2FS_MOUNT_EXTENT_CACHE 0x00002000 #define F2FS_MOUNT_FORCE_FG_GC 0x00004000 #define F2FS_MOUNT_DATA_FLUSH 0x00008000 +#define F2FS_MOUNT_FAULT_INJECTION 0x00010000 #define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) #define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 90d4b864590c..22348791700f 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -39,6 +39,10 @@ static struct proc_dir_entry *f2fs_proc_root; static struct kmem_cache *f2fs_inode_cachep; static struct kset *f2fs_kset; +#ifdef CONFIG_F2FS_FAULT_INJECTION +u32 f2fs_fault_rate = 0; +#endif + /* f2fs-wide shrinker description */ static struct shrinker f2fs_shrinker_info = { .scan_objects = f2fs_shrink_scan, @@ -68,6 +72,7 @@ enum { Opt_noextent_cache, Opt_noinline_data, Opt_data_flush, + Opt_fault_injection, Opt_err, }; @@ -93,6 +98,7 @@ static match_table_t f2fs_tokens = { {Opt_noextent_cache, "noextent_cache"}, {Opt_noinline_data, "noinline_data"}, {Opt_data_flush, "data_flush"}, + {Opt_fault_injection, "fault_injection=%u"}, {Opt_err, NULL}, }; @@ -300,6 +306,9 @@ static int parse_options(struct super_block *sb, char *options) char *p, *name; int arg = 0; +#ifdef CONFIG_F2FS_FAULT_INJECTION + f2fs_fault_rate = 0; +#endif if (!options) return 0; @@ -433,6 +442,16 @@ static int parse_options(struct super_block *sb, char *options) case Opt_data_flush: set_opt(sbi, DATA_FLUSH); break; + case Opt_fault_injection: + if (args->from && match_int(args, &arg)) + return -EINVAL; +#ifdef CONFIG_F2FS_FAULT_INJECTION + f2fs_fault_rate = arg; +#else + f2fs_msg(sb, KERN_INFO, + "FAULT_INJECTION was not selected"); +#endif + break; default: f2fs_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" or missing value", |