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authorJaegeuk Kim <jaegeuk@kernel.org>2016-04-29 16:17:09 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2016-05-07 10:32:23 -0700
commitc41f3cc3ae34acdbcec328084b4b74f686c02f0d (patch)
tree4012769ef67e049cdc38fef890f7c67881506457
parent2c63fead9e372b3b65d1883bb174df6c9820f1dd (diff)
f2fs: inject page allocation failures
This patch adds page allocation failures. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
-rw-r--r--fs/f2fs/f2fs.h9
-rw-r--r--fs/f2fs/super.c1
2 files changed, 10 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index cf03c57d0feb..d550a95d30f1 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -40,6 +40,7 @@
#ifdef CONFIG_F2FS_FAULT_INJECTION
enum {
FAULT_KMALLOC,
+ FAULT_PAGE_ALLOC,
FAULT_MAX,
};
@@ -1296,6 +1297,14 @@ static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
pgoff_t index, bool for_write)
{
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+ struct page *page = find_lock_page(mapping, index);
+ if (page)
+ return page;
+
+ if (time_to_inject(FAULT_PAGE_ALLOC))
+ return NULL;
+#endif
if (!for_write)
return grab_cache_page(mapping, index);
return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9a56f544da3e..986d0da84e01 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -45,6 +45,7 @@ atomic_t f2fs_ops;
char *fault_name[FAULT_MAX] = {
[FAULT_KMALLOC] = "kmalloc",
+ [FAULT_PAGE_ALLOC] = "page alloc",
};
#endif