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Btrfs-progs: make sure to save mirror_num only if it is set

Message ID 1393514749-28795-1-git-send-email-jbacik@fb.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Josef Bacik Feb. 27, 2014, 3:25 p.m. UTC
If we are cycling through all of the mirrors trying to find the best one we need
to make sure we set best_mirror to an actual mirror number and not 0.  Otherwise
we could end up reading a mirror that wasn't the best and make everybody sad.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
---
 disk-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/disk-io.c b/disk-io.c
index e840177..0bd1bb0 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -297,7 +297,7 @@  struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 			ignore = 1;
 			continue;
 		}
-		if (btrfs_header_generation(eb) > best_transid) {
+		if (btrfs_header_generation(eb) > best_transid && mirror_num) {
 			best_transid = btrfs_header_generation(eb);
 			good_mirror = mirror_num;
 		}