From a0a5472ad802d99d3fb4b361cc3fb5ea24914ee0 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Tue, 11 Oct 2022 13:17:00 +0100
Subject: btrfs: remove checks for a 0 inode number during backref walking
When doing backref walking to determine if an extent is shared, we are
testing if the inode number, stored in the 'inum' field of struct
share_check, is 0. However that can never be case, since the all instances
of the structure are created at btrfs_is_data_extent_shared(), which
always initializes it with the inode number from a fs tree (and the number
for any inode from any tree can never be 0). So remove the checks.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/backref.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'fs/btrfs/backref.c')
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index abac2e942e8b..9c7b3e1e4762 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1051,7 +1051,7 @@ static int add_inline_refs(const struct btrfs_fs_info *fs_info,
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = btrfs_extent_data_ref_offset(leaf, dref);
- if (sc && sc->inum && key.objectid != sc->inum &&
+ if (sc && key.objectid != sc->inum &&
!sc->have_delayed_delete_refs) {
ret = BACKREF_FOUND_SHARED;
break;
@@ -1152,7 +1152,7 @@ static int add_keyed_refs(struct btrfs_root *extent_root,
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = btrfs_extent_data_ref_offset(leaf, dref);
- if (sc && sc->inum && key.objectid != sc->inum &&
+ if (sc && key.objectid != sc->inum &&
!sc->have_delayed_delete_refs) {
ret = BACKREF_FOUND_SHARED;
break;
--
cgit