btrfs: factor btrfs_replay_log() out of open_ctree()

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9ecd19d..954f065 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2303,6 +2303,57 @@ static int btrfs_init_workqueues(struct btrfs_fs_info *fs_info,
        return 0;
 }
 
+static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
+                           struct btrfs_fs_devices *fs_devices)
+{
+       int ret;
+       struct btrfs_root *tree_root = fs_info->tree_root;
+       struct btrfs_root *log_tree_root;
+       struct btrfs_super_block *disk_super = fs_info->super_copy;
+       u64 bytenr = btrfs_super_log_root(disk_super);
+
+       if (fs_devices->rw_devices == 0) {
+               printk(KERN_WARNING "BTRFS: log replay required "
+                      "on RO media\n");
+               return -EIO;
+       }
+
+       log_tree_root = btrfs_alloc_root(fs_info);
+       if (!log_tree_root)
+               return -ENOMEM;
+
+       __setup_root(tree_root->nodesize, tree_root->sectorsize,
+                       tree_root->stripesize, log_tree_root, fs_info,
+                       BTRFS_TREE_LOG_OBJECTID);
+
+       log_tree_root->node = read_tree_block(tree_root, bytenr,
+                       fs_info->generation + 1);
+       if (!log_tree_root->node ||
+           !extent_buffer_uptodate(log_tree_root->node)) {
+               printk(KERN_ERR "BTRFS: failed to read log tree\n");
+               free_extent_buffer(log_tree_root->node);
+               kfree(log_tree_root);
+               return -EIO;
+       }
+       /* returns with log_tree_root freed on success */
+       ret = btrfs_recover_log_trees(log_tree_root);
+       if (ret) {
+               btrfs_error(tree_root->fs_info, ret,
+                           "Failed to recover log tree");
+               free_extent_buffer(log_tree_root->node);
+               kfree(log_tree_root);
+               return ret;
+       }
+
+       if (fs_info->sb->s_flags & MS_RDONLY) {
+               ret = btrfs_commit_super(tree_root);
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
+}
+
 int open_ctree(struct super_block *sb,
               struct btrfs_fs_devices *fs_devices,
               char *options)
@@ -2323,7 +2374,6 @@ int open_ctree(struct super_block *sb,
        struct btrfs_root *dev_root;
        struct btrfs_root *quota_root;
        struct btrfs_root *uuid_root;
-       struct btrfs_root *log_tree_root;
        int ret;
        int err = -EINVAL;
        int num_backups_tried = 0;
@@ -2904,48 +2954,11 @@ retry_root_backup:
 
        /* do not make disk changes in broken FS */
        if (btrfs_super_log_root(disk_super) != 0) {
-               u64 bytenr = btrfs_super_log_root(disk_super);
-
-               if (fs_devices->rw_devices == 0) {
-                       printk(KERN_WARNING "BTRFS: log replay required "
-                              "on RO media\n");
-                       err = -EIO;
-                       goto fail_qgroup;
-               }
-
-               log_tree_root = btrfs_alloc_root(fs_info);
-               if (!log_tree_root) {
-                       err = -ENOMEM;
-                       goto fail_qgroup;
-               }
-
-               __setup_root(nodesize, sectorsize, stripesize,
-                            log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
-
-               log_tree_root->node = read_tree_block(tree_root, bytenr,
-                                                     generation + 1);
-               if (!log_tree_root->node ||
-                   !extent_buffer_uptodate(log_tree_root->node)) {
-                       printk(KERN_ERR "BTRFS: failed to read log tree\n");
-                       free_extent_buffer(log_tree_root->node);
-                       kfree(log_tree_root);
-                       goto fail_qgroup;
-               }
-               /* returns with log_tree_root freed on success */
-               ret = btrfs_recover_log_trees(log_tree_root);
+               ret = btrfs_replay_log(fs_info, fs_devices);
                if (ret) {
-                       btrfs_error(tree_root->fs_info, ret,
-                                   "Failed to recover log tree");
-                       free_extent_buffer(log_tree_root->node);
-                       kfree(log_tree_root);
+                       err = ret;
                        goto fail_qgroup;
                }
-
-               if (sb->s_flags & MS_RDONLY) {
-                       ret = btrfs_commit_super(tree_root);
-                       if (ret)
-                               goto fail_qgroup;
-               }
        }
 
        ret = btrfs_find_orphan_roots(tree_root);