f2fs: inject kmalloc failure (2c63fead) · Commits · 戴 / test

fs/f2fs/f2fs.h

+29 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,31 @@
		} while (0)
		#endif

		#ifdef CONFIG_F2FS_FAULT_INJECTION
		enum {
		FAULT_KMALLOC,
		FAULT_MAX,
		};

		extern u32 f2fs_fault_rate;
		extern atomic_t f2fs_ops;
		extern char *fault_name[FAULT_MAX];

		static inline bool time_to_inject(int type)
		{
		atomic_inc(&f2fs_ops);
		if (f2fs_fault_rate && (atomic_read(&f2fs_ops) >= f2fs_fault_rate)) {
		atomic_set(&f2fs_ops, 0);
		printk("%sF2FS-fs : inject %s in %pF\n",
		KERN_INFO,
		fault_name[type],
		__builtin_return_address(0));
		return true;
		}
		return false;
		}
		#endif

		/*
		* For mount options
		*/
		@@ -1647,6 +1672,10 @@ static inline bool f2fs_may_extent_tree(struct inode *inode)

		static inline void *f2fs_kmalloc(size_t size, gfp_t flags)
		{
		#ifdef CONFIG_F2FS_FAULT_INJECTION
		if (time_to_inject(FAULT_KMALLOC))
		return NULL;
		#endif
		return kmalloc(size, flags);
		}

+6 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,11 @@ static struct kset *f2fs_kset;

		#ifdef CONFIG_F2FS_FAULT_INJECTION
		u32 f2fs_fault_rate = 0;
		atomic_t f2fs_ops;

		char *fault_name[FAULT_MAX] = {
		[FAULT_KMALLOC] = "kmalloc",
		};
		#endif

		/* f2fs-wide shrinker description */
		@@ -447,6 +452,7 @@ static int parse_options(struct super_block sb, char options)
		return -EINVAL;
		#ifdef CONFIG_F2FS_FAULT_INJECTION
		f2fs_fault_rate = arg;
		atomic_set(&f2fs_ops, 0);
		#else
		f2fs_msg(sb, KERN_INFO,
		"FAULT_INJECTION was not selected");