From 9ad0f5ca9ccd0d1af16c99c33f011520a65b027f Mon Sep 17 00:00:00 2001
From: Wengang Wang <wen.gang.wang@oracle.com>
Date: Fri, 24 Sep 2021 15:43:35 -0700
Subject: [PATCH] ocfs2: drop acl cache for directories too
Git-commit: 9c0f0a03e386f4e1df33db676401547e1b7800c6
Patch-mainline: v5.15-rc3
References: stable-5.14.9

commit 9c0f0a03e386f4e1df33db676401547e1b7800c6 upstream.

ocfs2_data_convert_worker() is currently dropping any cached acl info
for FILE before down-converting meta lock.  It should also drop for
DIRECTORY.  Otherwise the second acl lookup returns the cached one (from
VFS layer) which could be already stale.

The problem we are seeing is that the acl changes on one node doesn't
get refreshed on other nodes in the following case:

  Node 1                    Node 2
  --------------            ----------------
  getfacl dir1

                            getfacl dir1    <-- this is OK

  setfacl -m u:user1:rwX dir1
  getfacl dir1   <-- see the change for user1

                            getfacl dir1    <-- can't see change for user1

Link: https://lkml.kernel.org/r/20210903012631.6099-1-wen.gang.wang@oracle.com
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 fs/ocfs2/dlmglue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 48fd369c29a4..a2a2ae37b859 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3939,7 +3939,7 @@ static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
 		oi = OCFS2_I(inode);
 		oi->ip_dir_lock_gen++;
 		mlog(0, "generation: %u\n", oi->ip_dir_lock_gen);
-		goto out;
+		goto out_forget;
 	}
 
 	if (!S_ISREG(inode->i_mode))
@@ -3970,6 +3970,7 @@ static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres,
 		filemap_fdatawait(mapping);
 	}
 
+out_forget:
 	forget_all_cached_acls(inode);
 
 out:
-- 
2.26.2