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authorMike Snitzer <snitzer@redhat.com>2010-08-12 05:14:12 +0200
committerAlasdair G Kergon <agk@redhat.com>2010-08-12 05:14:12 +0200
commitf8facb61b5095488a4d78fa78116ef4f4b82bc4d (patch)
tree5ee747721c27a8ac1cb68bb05862bfdfea185d9b
parentdm: use dm_target_offset macro (diff)
downloadlinux-f8facb61b5095488a4d78fa78116ef4f4b82bc4d.tar.xz
linux-f8facb61b5095488a4d78fa78116ef4f4b82bc4d.zip
dm: zero silently drop discards
Have the zero target silently drop a discard rather than fail the request with -EOPNOTSUPP. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-zero.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c
index bbc97030c0c2..cc2b3cb81946 100644
--- a/drivers/md/dm-zero.c
+++ b/drivers/md/dm-zero.c
@@ -22,6 +22,11 @@ static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
return -EINVAL;
}
+ /*
+ * Silently drop discards, avoiding -EOPNOTSUPP.
+ */
+ ti->num_discard_requests = 1;
+
return 0;
}