+ ocfs2-drop-acl-cache-for-directories-too.patch added to -mm tree

+ ocfs2-drop-acl-cache-for-directories-too.patch added to -mm tree

[akpm]

The patch titled
     Subject: ocfs2: drop acl cache for directories too
has been added to the -mm tree.  Its filename is
     ocfs2-drop-acl-cache-for-directories-too.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/ocfs2-drop-acl-cache-for-directories-too.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-drop-acl-cache-for-directories-too.patch

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------------------------------------------------------
From: Wengang Wang <wen.gang.wang@oracle.com>
Subject: ocfs2: drop acl cache for directories too

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>
---

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

--- a/fs/ocfs2/dlmglue.c~ocfs2-drop-acl-cache-for-directories-too
+++ a/fs/ocfs2/dlmglue.c
@@ -3951,7 +3951,7 @@ static int ocfs2_data_convert_worker(str
 		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))
@@ -3982,6 +3982,7 @@ static int ocfs2_data_convert_worker(str
 		filemap_fdatawait(mapping);
 	}
 
+out_forget:
 	forget_all_cached_acls(inode);
 
 out:
_

Patches currently in -mm which might be from wen.gang.wang@oracle.com are

ocfs2-drop-acl-cache-for-directories-too.patch