From: Mike Snitzer <snitzer@redhat.com>
To: dm-devel@redhat.com
Subject: [PATCH v2 07/12] dm zero: silently drop discards too
Date: Sat, 24 Jul 2010 12:09:23 -0400 [thread overview]
Message-ID: <1279987768-13275-8-git-send-email-snitzer@redhat.com> (raw)
In-Reply-To: <1279987768-13275-1-git-send-email-snitzer@redhat.com>
Have the zero target silently drop a discard rather than fail the
request with -EOPNOTSUPP.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
drivers/md/dm-zero.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c
index bbc9703..8bd76e0 100644
--- a/drivers/md/dm-zero.c
+++ b/drivers/md/dm-zero.c
@@ -22,6 +22,9 @@ static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
return -EINVAL;
}
+ /* silently drop discards (this avoids -EOPNOTSUPP) */
+ ti->num_discard_requests = 1;
+
return 0;
}
--
1.6.6.1
next prev parent reply other threads:[~2010-07-24 16:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-24 16:09 [PATCH v2 00/12] dm: enable discard support for more targets Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 01/12] dm: rename map_info flush_request to target_request_nr Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 02/12] dm: introduce num_discard_requests in dm_target structure Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 03/12] dm: remove the DM_TARGET_SUPPORTS_DISCARDS feature flag Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 04/12] dm: use common __issue_target_request for flush and discard support Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 05/12] dm: factor max_io_len for code reuse Mike Snitzer
2010-07-26 21:36 ` [PATCH v3 " Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 06/12] dm: split discard requests on target boundaries Mike Snitzer
2010-07-26 21:41 ` [PATCH v3 " Mike Snitzer
2010-07-24 16:09 ` Mike Snitzer [this message]
2010-07-24 16:09 ` [PATCH v2 08/12] dm error: return error for discards too Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 09/12] dm delay: enable discard support Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 10/12] block: update request stacking methods to support discards Mike Snitzer
2010-07-27 14:54 ` Christoph Hellwig
2010-07-24 16:09 ` [PATCH v2 11/12] dm mpath: enable discard support Mike Snitzer
2010-07-26 20:41 ` [PATCH v3 " Mike Snitzer
2010-07-24 16:09 ` [PATCH v2 12/12] dm stripe: enable efficient " Mike Snitzer
2010-07-27 20:32 ` [PATCH v3 " Mike Snitzer
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