bcachefs: Fix bch2_inode_insert() race path for tmpfiles

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index f9c9a95d7d4cada3b4c55a853d99627009b8d39a..1768b2678b3879c30e1146a898d9726e84e72297 100644 (file)
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -194,6 +194,12 @@ static struct bch_inode_info *bch2_inode_insert(struct bch_fs *c, struct bch_ino
                 * discard_new_inode() expects it to be set...
                 */
                inode->v.i_flags |= I_NEW;
+               /*
+                * We don't want bch2_evict_inode() to delete the inode on disk,
+                * we just raced and had another inode in cache. Normally new
+                * inodes don't have nlink == 0 - except tmpfiles do...
+                */
+               set_nlink(&inode->v, 1);
                discard_new_inode(&inode->v);
                inode = old;
        } else {