btrfs-progs: Refactor find_next_chunk to get rid of parameter root and objectid

Function find_next_chunk() is used to find next chunk start position,
which should only do search on chunk tree and objectid is set to
BTRFS_FIRST_CHUNK_TREE_OBJECTID.

So refactor the parameter list to get rid of @root, which should be
obtained from fs_info->chunk_root, and @objectid, which is set to
BTRFS_FIRST_CHUNK_TREE_OBJECTID.

Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/volumes.c b/volumes.c
index 2ae2d1b..2209e5a 100644 (file)
--- a/volumes.c
+++ b/volumes.c
@@ -505,8 +505,9 @@ err:
        return ret;
 }
 
-static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset)
+static int find_next_chunk(struct btrfs_fs_info *fs_info, u64 *offset)
 {
+       struct btrfs_root *root = fs_info->chunk_root;
        struct btrfs_path *path;
        int ret;
        struct btrfs_key key;
@@ -517,7 +518,7 @@ static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset)
        if (!path)
                return -ENOMEM;
 
-       key.objectid = objectid;
+       key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
        key.offset = (u64)-1;
        key.type = BTRFS_CHUNK_ITEM_KEY;
 
@@ -533,7 +534,7 @@ static int find_next_chunk(struct btrfs_root *root, u64 objectid, u64 *offset)
        } else {
                btrfs_item_key_to_cpu(path->nodes[0], &found_key,
                                      path->slots[0]);
-               if (found_key.objectid != objectid)
+               if (found_key.objectid != BTRFS_FIRST_CHUNK_TREE_OBJECTID)
                        *offset = 0;
                else {
                        chunk = btrfs_item_ptr(path->nodes[0], path->slots[0],
@@ -995,8 +996,7 @@ again:
                }
                return -ENOSPC;
        }
-       ret = find_next_chunk(chunk_root, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
-                             &offset);
+       ret = find_next_chunk(info, &offset);
        if (ret)
                return ret;
        key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
@@ -1129,9 +1129,7 @@ int btrfs_alloc_data_chunk(struct btrfs_trans_handle *trans,
        } else {
                u64 tmp;
 
-               ret = find_next_chunk(chunk_root,
-                                     BTRFS_FIRST_CHUNK_TREE_OBJECTID,
-                                     &tmp);
+               ret = find_next_chunk(info, &tmp);
                key.offset = tmp;
                if (ret)
                        return ret;