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[03/14] Btrfs: raid56: detect raid56 log on mount

Message ID 20170801161439.13426-4-bo.li.liu@oracle.com (mailing list archive)
State New, archived
Headers show

Commit Message

Liu Bo Aug. 1, 2017, 4:14 p.m. UTC 
We've put the flag BTRFS_DEV_RAID56_LOG in device->type, so we can
recognize the journal device of raid56 while reading the chunk tree.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/volumes.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 5c50df7..a17a488 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6696,6 +6696,18 @@  static int read_one_dev(struct btrfs_fs_info *fs_info,
 	}
 
 	fill_device_from_item(leaf, dev_item, device);
+
+	if (device->type & BTRFS_DEV_RAID56_LOG) {
+		ret = btrfs_set_r5log(fs_info, device);
+		if (ret) {
+			btrfs_err(fs_info, "error %d on loading r5log", ret);
+			return ret;
+		}
+
+		btrfs_info(fs_info, "devid %llu uuid %pU is raid56 log",
+			   device->devid, device->uuid);
+	}
+
 	device->in_fs_metadata = 1;
 	if (device->writeable && !device->is_tgtdev_for_dev_replace) {
 		device->fs_devices->total_rw_bytes += device->total_bytes;