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

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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>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Josef Bacik 2014-02-27 10:25:49 -05:00 committed by Chris Mason
parent 47c18d17c5
commit 4bcfcb47fa
1 changed files with 1 additions and 1 deletions
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2
disk-io.c
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@ -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;
}