[PATCH v4] f2fs: stop issue discard if something wrong with f2fs

[Yunlei He <heyunlei@huawei.com>]

This patch stop async thread and umount process to issue discard
if something wrong with f2fs, which is similar to fstrim.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
---
 fs/f2fs/segment.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 5854cc4..1659985 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1202,6 +1202,9 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 	int i, iter = 0, issued = 0;
 	bool io_interrupted = false;
 
+	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+		return issued;
+
 	for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
 		if (i + 1 < dpolicy->granularity)
 			break;
@@ -1410,6 +1413,8 @@ static int issue_discard_thread(void *data)
 			continue;
 		if (kthread_should_stop())
 			return 0;
+		if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+			continue;
 
 		if (dcc->discard_wake)
 			dcc->discard_wake = 0;
-- 
1.9.1


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