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authorChao Yu <yuchao0@huawei.com>2016-09-18 18:30:07 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2016-09-22 21:43:06 +0300
commit8b038c70dfe4fd7b62573917a9e976f826ac6ad3 (patch)
tree175fe3a2f6b72002259feb601f0de64b77de20f1 /fs/f2fs
parent866969668aebe9626c083b9ababc8f88454ce049 (diff)
downloadlinux-8b038c70dfe4fd7b62573917a9e976f826ac6ad3.tar.xz
f2fs: support IO error injection
This patch adds to support IO error injection for testing IO error tolerance of f2fs. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c5
-rw-r--r--fs/f2fs/f2fs.h3
-rw-r--r--fs/f2fs/super.c1
3 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 528c3c0d55a2..25e3c302b72f 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -34,6 +34,11 @@ static void f2fs_read_end_io(struct bio *bio)
struct bio_vec *bvec;
int i;
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+ if (time_to_inject(FAULT_IO))
+ bio->bi_error = -EIO;
+#endif
+
if (f2fs_bio_encrypted(bio)) {
if (bio->bi_error) {
fscrypt_release_ctx(bio->bi_private);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 951b9b3bc5f3..f28b3f8fa72b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -46,6 +46,7 @@ enum {
FAULT_BLOCK,
FAULT_DIR_DEPTH,
FAULT_EVICT_INODE,
+ FAULT_IO,
FAULT_MAX,
};
@@ -77,6 +78,8 @@ static inline bool time_to_inject(int type)
return false;
else if (type == FAULT_EVICT_INODE && !IS_FAULT_SET(type))
return false;
+ else if (type == FAULT_IO && !IS_FAULT_SET(type))
+ return false;
atomic_inc(&f2fs_fault.inject_ops);
if (atomic_read(&f2fs_fault.inject_ops) >= f2fs_fault.inject_rate) {
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 555217fe43ce..29e3cf4ccf1b 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -50,6 +50,7 @@ char *fault_name[FAULT_MAX] = {
[FAULT_BLOCK] = "no more block",
[FAULT_DIR_DEPTH] = "too big dir depth",
[FAULT_EVICT_INODE] = "evict_inode fail",
+ [FAULT_IO] = "IO error",
};
static void f2fs_build_fault_attr(unsigned int rate)