Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 73faec4d authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add mount option to select fault injection ratio 



This patch adds a mount option to select fault ratio.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 300e129c

fs/f2fs/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -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.

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

fs/f2fs/super.c

+19 −0
Original line number Diff line number Diff line
@@ -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",