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Btrfs: Deal with failed writes in mirrored configurations

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-04-29 09:38:00 -04:00
parent 4235298e4f
commit a236aed14c
4 changed files with 33 additions and 8 deletions
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17
fs/btrfs/disk-io.c
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@ -1385,7 +1385,10 @@ int write_all_supers(struct btrfs_root *root)
struct buffer_head *bh;
int ret;
int do_barriers;
int max_errors;
int total_errors = 0;
max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1;
do_barriers = !btrfs_test_opt(root, NOBARRIER);
sb = root->fs_info->sb_buffer;
@ -1433,8 +1436,14 @@ int write_all_supers(struct btrfs_root *root)
} else {
ret = submit_bh(WRITE, bh);
}
BUG_ON(ret);
if (ret)
total_errors++;
}
if (total_errors > max_errors) {
printk("btrfs: %d errors while writing supers\n", total_errors);
BUG();
}
total_errors = 0;
list_for_each(cur, head) {
dev = list_entry(cur, struct btrfs_device, dev_list);
@ -1454,13 +1463,17 @@ int write_all_supers(struct btrfs_root *root)
wait_on_buffer(bh);
BUG_ON(!buffer_uptodate(bh));
} else {
BUG();
total_errors++;
}
}
dev->pending_io = NULL;
brelse(bh);
}
if (total_errors > max_errors) {
printk("btrfs: %d errors while writing supers\n", total_errors);
BUG();
}
return 0;
}