btrfs: tree-checker: Replace root parameter with fs_info

When inspecting the error message with real corruption, the "root=%llu"
always shows "1" (root tree), instead of the correct owner.

The problem is that we are getting @root from page->mapping->host, which
points the same btree inode, so we will always get the same root.

This makes the root owner output meaningless, and harder to port
tree-checker to btrfs-progs.

So get rid of the false and meaningless @root parameter and replace it
with @fs_info.
To get the owner, we can only rely on btrfs_header_owner() now.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

@@ -602,12 +602,12 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 	 * that we don't try and read the other copies of this block, just
 	 * return -EIO.
 	 */
-	if (found_level == 0 && btrfs_check_leaf_full(root, eb)) {
+	if (found_level == 0 && btrfs_check_leaf_full(fs_info, eb)) {
 		set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 		ret = -EIO;
 	}
 
-	if (found_level > 0 && btrfs_check_node(root, eb))
+	if (found_level > 0 && btrfs_check_node(fs_info, eb))
 		ret = -EIO;
 
 	if (!ret)
@@ -3854,7 +3854,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 	 * So here we should only check item pointers, not item data.
 	 */
 	if (btrfs_header_level(buf) == 0 &&
-	    btrfs_check_leaf_relaxed(root, buf)) {
+	    btrfs_check_leaf_relaxed(fs_info, buf)) {
 		btrfs_print_leaf(buf);
 		ASSERT(0);
 	}

fs/btrfs/tree-checker.h

@@ -25,14 +25,15 @@
  * Will check not only the item pointers, but also every possible member
  * in item data.
  */
-int btrfs_check_leaf_full(struct btrfs_root *root, struct extent_buffer *leaf);
+int btrfs_check_leaf_full(struct btrfs_fs_info *fs_info,
+			  struct extent_buffer *leaf);
 
 /*
  * Less strict leaf checker.
  * Will only check item pointers, not reading item data.
  */
-int btrfs_check_leaf_relaxed(struct btrfs_root *root,
+int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
 			     struct extent_buffer *leaf);
-int btrfs_check_node(struct btrfs_root *root, struct extent_buffer *node);
+int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node);
 
 #endif