[PATCH v2 5/7] btrfs: scrub: simplify the inode iteration output

[Qu Wenruo <wqu@suse.com>]

The following two output are not really needed:

- nlinks
  Normally file inodes should have nlinks as 1, for those inodes have
  multiple hard links, the inode/root number is still enough to pin it
  down to certain inode.

- size
  The size is always fixed to sector size.

By removing the nlinks output, we can reduce one inode item lookup.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/scrub.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index ff952dd2b510..85f321e3e37c 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -388,17 +388,13 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
 static int scrub_print_warning_inode(u64 inum, u64 offset, u64 num_bytes,
 				     u64 root, void *warn_ctx)
 {
-	u32 nlink;
 	int ret;
 	int i;
 	unsigned nofs_flag;
-	struct extent_buffer *eb;
-	struct btrfs_inode_item *inode_item;
 	struct scrub_warning *swarn = warn_ctx;
 	struct btrfs_fs_info *fs_info = swarn->dev->fs_info;
 	struct inode_fs_paths *ipath = NULL;
 	struct btrfs_root *local_root;
-	struct btrfs_key key;
 
 	local_root = btrfs_get_fs_root(fs_info, root, true);
 	if (IS_ERR(local_root)) {
@@ -406,26 +402,6 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 num_bytes,
 		goto err;
 	}
 
-	/*
-	 * this makes the path point to (inum INODE_ITEM ioff)
-	 */
-	key.objectid = inum;
-	key.type = BTRFS_INODE_ITEM_KEY;
-	key.offset = 0;
-
-	ret = btrfs_search_slot(NULL, local_root, &key, swarn->path, 0, 0);
-	if (ret) {
-		btrfs_put_root(local_root);
-		btrfs_release_path(swarn->path);
-		goto err;
-	}
-
-	eb = swarn->path->nodes[0];
-	inode_item = btrfs_item_ptr(eb, swarn->path->slots[0],
-					struct btrfs_inode_item);
-	nlink = btrfs_inode_nlink(eb, inode_item);
-	btrfs_release_path(swarn->path);
-
 	/*
 	 * init_path might indirectly call vmalloc, or use GFP_KERNEL. Scrub
 	 * uses GFP_NOFS in this context, so we keep it consistent but it does
@@ -451,12 +427,11 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 num_bytes,
 	 */
 	for (i = 0; i < ipath->fspath->elem_cnt; ++i)
 		btrfs_warn_in_rcu(fs_info,
-"%s at logical %llu on dev %s, physical %llu, root %llu, inode %llu, offset %llu, length %u, links %u (path: %s)",
+"%s at logical %llu on dev %s, physical %llu, root %llu, inode %llu, offset %llu, path: %s",
 				  swarn->errstr, swarn->logical,
 				  btrfs_dev_name(swarn->dev),
 				  swarn->physical,
 				  root, inum, offset,
-				  fs_info->sectorsize, nlink,
 				  (char *)(unsigned long)ipath->fspath->val[i]);
 
 	btrfs_put_root(local_root);
-- 
2.44.0