Btrfs: Metadata ENOSPC handling for tree log

Previous patches make the allocater return -ENOSPC if there is no
unreserved free metadata space. This patch updates tree log code
and various other places to propagate/handle the ENOSPC error.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 82955b73a962..a8772b5a9cb5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -972,42 +972,6 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
         return 0;
 }
 
-int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
-                             struct btrfs_fs_info *fs_info)
-{
-        struct extent_buffer *eb;
-        struct btrfs_root *log_root_tree = fs_info->log_root_tree;
-        u64 start = 0;
-        u64 end = 0;
-        int ret;
-
-        if (!log_root_tree)
-                return 0;
-
-        while (1) {
-                ret = find_first_extent_bit(&log_root_tree->dirty_log_pages,
-                                0, &start, &end, EXTENT_DIRTY | EXTENT_NEW);
-                if (ret)
-                        break;
-
-                clear_extent_bits(&log_root_tree->dirty_log_pages, start, end,
-                                  EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS);
-        }
-        eb = fs_info->log_root_tree->node;
-
-        WARN_ON(btrfs_header_level(eb) != 0);
-        WARN_ON(btrfs_header_nritems(eb) != 0);
-
-        ret = btrfs_free_reserved_extent(fs_info->tree_root,
-                                eb->start, eb->len);
-        BUG_ON(ret);
-
-        free_extent_buffer(eb);
-        kfree(fs_info->log_root_tree);
-        fs_info->log_root_tree = NULL;
-        return 0;
-}
-
 static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
                                          struct btrfs_fs_info *fs_info)
 {