Btrfs: Clear space_info full when adding new devices

The full flag on the space info structs tells the allocator not to try
and allocate more chunks because the devices in the FS are fully allocated.

When more devices are added, we need to clear the full flag so the allocator
knows it has more space available.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 7aa3810d7f69..dd06e18e5aac 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1374,6 +1374,12 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
                 ret = btrfs_add_device(trans, root, device);
         }
 
+        /*
+         * we've got more storage, clear any full flags on the space
+         * infos
+         */
+        btrfs_clear_space_info_full(root->fs_info);
+
         unlock_chunks(root);
         btrfs_commit_transaction(trans, root);