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>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 90d4b86..2234879 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -39,6 +39,10 @@
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 @@
Opt_noextent_cache,
Opt_noinline_data,
Opt_data_flush,
+ Opt_fault_injection,
Opt_err,
};
@@ -93,6 +98,7 @@
{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 @@
char *p, *name;
int arg = 0;
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+ f2fs_fault_rate = 0;
+#endif
if (!options)
return 0;
@@ -433,6 +442,16 @@
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",