diff mbox series

[4.19,095/425] md/raid1: properly indicate failure when ending a failed write request

Message ID 20210520092134.579218652@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 20, 2021, 9:17 a.m. UTC 
From: Paul Clements <paul.clements@us.sios.com>

commit 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd upstream.

This patch addresses a data corruption bug in raid1 arrays using bitmaps.
Without this fix, the bitmap bits for the failed I/O end up being cleared.

Since we are in the failure leg of raid1_end_write_request, the request
either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).

Fixes: eeba6809d8d5 ("md/raid1: end bio when the device faulty")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Paul Clements <paul.clements@us.sios.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/md/raid1.c |    2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -445,6 +445,8 @@  static void raid1_end_write_request(stru
 		if (!test_bit(Faulty, &rdev->flags))
 			set_bit(R1BIO_WriteError, &r1_bio->state);
 		else {
+			/* Fail the request */
+			set_bit(R1BIO_Degraded, &r1_bio->state);
 			/* Finished with this branch */
 			r1_bio->bios[mirror] = NULL;
 			to_put = bio;