On Wed, Jul 03, 2013 at 04:36:44PM -0400, Chris Mason wrote:
> Quoting Miao Xie (2013-07-03 09:25:08)
> > This patchset introduced chunk recover function, which was implemented by
> > scanning the whoel disks in the filesystem. Now, we can recover Single,
> > Dup, RAID1 chunks, and RAID0, RAID10, RAID5, RAID6 metadata chunks.
> 
> Really nice.  I've integrated this with Liu Bo's btrfs-image fixes and
> put it into a branch called integration.  I've tested both repair and
> image here, but if you could please double check the merge I'd
> appreciate it.

We still need another patch to make image work(actually we need to initialize
missing device's uuid to NULL).

It's the read_one_dev() part in

https://patchwork.kernel.org/patch/2787291/

diff --git a/volumes.c b/volumes.c
index d6f81f8..061f094 100644
--- a/volumes.c
+++ b/volumes.c
@@ -116,6 +116,7 @@ static int device_list_add(const char *path,
                        /* we can safely leave the fs_devices entry around */
                        return -ENOMEM;
                }
+               device->fd = -1;
                device->devid = devid;
                memcpy(device->uuid, disk_super->dev_item.uuid,
                       BTRFS_UUID_SIZE);
@@ -1628,10 +1629,10 @@ static int read_one_dev(struct btrfs_root *root,
        if (!device) {
                printk("warning devid %llu not found already\n",
                        (unsigned long long)devid);
-               device = kmalloc(sizeof(*device), GFP_NOFS);
+               device = kzalloc(sizeof(*device), GFP_NOFS);
                if (!device)
                        return -ENOMEM;
-               device->total_ios = 0;
+               device->fd = -1;
                list_add(&device->dev_list,
                         &root->fs_info->fs_devices->devices);
        }

-liubo
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