[dm-devel] [PATCH for-3.14 08/20] dm thin: return error from alloc_data_block if pool is not in write mode
Mike Snitzer
snitzer at redhat.com
Fri Dec 20 23:37:21 UTC 2013
From: Joe Thornber <ejt at redhat.com>
Signed-off-by: Joe Thornber <ejt at redhat.com>
Signed-off-by: Mike Snitzer <snitzer at redhat.com>
---
drivers/md/dm-thin.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 70b02fd..b721d7a 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -927,6 +927,9 @@ static int alloc_data_block(struct thin_c *tc, dm_block_t *result)
if (pool->no_free_space)
return -ENOSPC;
+ if (get_pool_mode(pool) != PM_WRITE)
+ return -EINVAL;
+
r = dm_pool_get_free_block_count(pool->pmd, &free_blocks);
if (r)
return r;
--
1.8.1.4
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