Btrfs-progs: Add chunk rebuild function for RAID1/SINGLE/DUP

Add chunk rebuild for RAID1/SINGLE/DUP to chunk-recover command.

Before this patch chunk-recover can only scan and reuse the old chunk
data to recover. With this patch, chunk-recover can use the reference
between chunk/block group/dev extent to rebuild the whole chunk tree
even when old chunks are not available.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/volumes.c b/volumes.c
index 42cd943..ab282d3 100644
--- a/volumes.c
+++ b/volumes.c
@@ -1386,16 +1386,15 @@ struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
 	return NULL;
 }
 
-struct btrfs_device *btrfs_find_device_by_devid(struct btrfs_root *root,
-						u64 devid, int instance)
+struct btrfs_device *
+btrfs_find_device_by_devid(struct btrfs_fs_devices *fs_devices,
+			   u64 devid, int instance)
 {
-	struct list_head *head = &root->fs_info->fs_devices->devices;
+	struct list_head *head = &fs_devices->devices;
 	struct btrfs_device *dev;
-	struct list_head *cur;
 	int num_found = 0;
 
-	list_for_each(cur, head) {
-		dev = list_entry(cur, struct btrfs_device, dev_list);
+	list_for_each_entry(dev, head, dev_list) {
 		if (dev->devid == devid && num_found++ == instance)
 			return dev;
 	}