linux-kernel - [PATCH 1/2] dm verity: fix DM_VERITY_OPTS

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Message-Id: <1615464651-23675-1-git-send-email-jhs2.lee@samsung.com>
Date:   Thu, 11 Mar 2021 21:10:50 +0900
From:   JeongHyeon Lee <jhs2.lee@...sung.com>
To:     snitzer@...hat.com
Cc:     agk@...hat.com, dm-devel@...hat.com, linux-kernel@...r.kernel.org,
        JeongHyeon Lee <jhs2.lee@...sung.com>
Subject: [PATCH 1/2] dm verity: fix DM_VERITY_OPTS_MAX value

Three optional parameters at once using dm verity table is not
supported, option can only be used exclusively.

e.g.)
  (verity_mode) (ignore_zero_block) (check_at_most_once)

verity table: '1  /dev/sdb /dev/sdb 4096 4096 1028807 1028807
<hash_alg> <root_hash> <salt> 11 use_fec_from_device /dev/sdb
fec_roots 2 fec_blocks 1036909 fec_start 1036909
restart_on_corruption ignore_zero_blocks check_at_most_once'

Signed-off-by: JeongHyeon Lee <jhs2.lee@...sung.com>
---
 drivers/md/dm-verity-target.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 6b8e5bdd8526..808a98ef624c 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -34,7 +34,7 @@
 #define DM_VERITY_OPT_IGN_ZEROES	"ignore_zero_blocks"
 #define DM_VERITY_OPT_AT_MOST_ONCE	"check_at_most_once"
 
-#define DM_VERITY_OPTS_MAX		(2 + DM_VERITY_OPTS_FEC + \
+#define DM_VERITY_OPTS_MAX		(3 + DM_VERITY_OPTS_FEC + \
 					 DM_VERITY_ROOT_HASH_VERIFICATION_OPTS)
 
 static unsigned dm_verity_prefetch_cluster = DM_VERITY_DEFAULT_PREFETCH_SIZE;
-- 
2.17.1