From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Mon, 1 Jul 2024 20:23:54 +0000 (-0400)
Subject: bcachefs: Fix bch2_inode_insert() race path for tmpfiles
X-Git-Tag: v6.10~16^2~13
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=b02f973e67589cf617f229250e2a738ab62ca666;p=linux-block.git

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 f9c9a95d7d4c..1768b2678b38 100644
--- 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 {