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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>
This commit is contained in:
Jaegeuk Kim 2016-04-29 15:34:32 -07:00
parent 300e129c15
commit 73faec4d99
3 changed files with 28 additions and 0 deletions
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8
fs/f2fs/Kconfig
View File

@ -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.

1
fs/f2fs/f2fs.h
View File

@ -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)

19
fs/f2fs/super.c
View File

@ -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",