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Subject[PATCH] f2fs: support discard submission error injection
Date
This patch adds to support discard submission error injection for testing
error handling of __submit_discard_cmd().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/segment.c | 8 ++++++++
fs/f2fs/super.c | 1 +
3 files changed, 10 insertions(+)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ae9dfad58046..1e07fcd7f580 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -56,6 +56,7 @@ enum {
FAULT_TRUNCATE,
FAULT_IO,
FAULT_CHECKPOINT,
+ FAULT_DISCARD,
FAULT_MAX,
};

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index ccad453bd2b7..db8a79ac5b3f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1045,10 +1045,18 @@ static void __submit_discard_cmd(struct f2fs_sb_info *sbi,

dc->len += len;

+#ifdef CONFIG_F2FS_FAULT_INJECTION
+ if (time_to_inject(sbi, FAULT_DISCARD)) {
+ f2fs_show_injection_info(FAULT_DISCARD);
+ err = -EIO;
+ goto submit;
+ }
+#endif
err = __blkdev_issue_discard(bdev,
SECTOR_FROM_BLOCK(start),
SECTOR_FROM_BLOCK(len),
GFP_NOFS, 0, &bio);
+submit:
if (!err && bio) {
/*
* should keep before submission to avoid D_DONE
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index ba2fd51580d2..254f74a6b481 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -55,6 +55,7 @@ char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_TRUNCATE] = "truncate fail",
[FAULT_IO] = "IO error",
[FAULT_CHECKPOINT] = "checkpoint error",
+ [FAULT_DISCARD] = "discard error",
};

void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate)
--
2.18.0.rc1
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