From: Wengang Wang wen.gang.wang@oracle.com
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 --- fs/ocfs2/dlmglue.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -3939,7 +3939,7 @@ 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)) @@ -3970,6 +3970,7 @@ static int ocfs2_data_convert_worker(str filemap_fdatawait(mapping); }
+out_forget: forget_all_cached_acls(inode);
out: