From: Josef Bacik <josef@xxxxxxxxxx>
If we hit a bad disk and the read doesn't work, try other mirrors in case we
have other disks with good copies. Thanks,
Signed-off-by: Josef Bacik <josef@xxxxxxxxxx>
---
cmds-restore.c | 13 ++++++++++---
1 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/cmds-restore.c b/cmds-restore.c
index 1d24691..617f507 100644
--- a/cmds-restore.c
+++ b/cmds-restore.c
@@ -245,9 +245,16 @@ again:
done = pread(dev_fd, inbuf+count, length, dev_bytenr);
if (done < length) {
- ret = -1;
- fprintf(stderr, "Short read %d\n", errno);
- goto out;
+ num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
+ bytenr, length);
+ mirror_num++;
+ if (mirror_num >= num_copies) {
+ ret = -1;
+ fprintf(stderr, "Exhausted mirrors trying to read\n");
+ goto out;
+ }
+ fprintf(stderr, "Trying another mirror\n");
+ goto again;
}
count += length;
--
1.7.7.6
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