From: Chao Yu <yuch...@huawei.com>

This patch adds to support IO error injection for testing IO error
tolerance of f2fs.

Signed-off-by: Chao Yu <yuch...@huawei.com>
---
 fs/f2fs/data.c  | 5 +++++
 fs/f2fs/f2fs.h  | 3 +++
 fs/f2fs/super.c | 1 +
 3 files changed, 9 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 120a995..251cc33 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 b615f3f..a1a68bf 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 f809729..fafa34e 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)
-- 
2.7.2


------------------------------------------------------------------------------
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

Reply via email to