diff mbox series

[06/16] ocfs2: drop acl cache for directories too

Message ID 20210924224335.qEoBbK0p3%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [01/16] mm, hwpoison: add is_free_buddy_page() in HWPoisonHandlable() | expand

Commit Message

Andrew Morton Sept. 24, 2021, 10:43 p.m. UTC 
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(-)
diff mbox series

Patch

--- 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: