[PATCH 5.4 01/68] ocfs2: drop acl cache for directories too

From: Greg Kroah-Hartman
Date: Mon Sep 27 2021 - 13:03:49 EST

From: Wengang Wang <wen.gang.wang@xxxxxxxxxx>

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@xxxxxxxxxx
Signed-off-by: Wengang Wang <wen.gang.wang@xxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
fs/ocfs2/dlmglue.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3933,7 +3933,7 @@ static int ocfs2_data_convert_worker(str
oi = OCFS2_I(inode);
mlog(0, "generation: %u\n", oi->ip_dir_lock_gen);
- goto out;
+ goto out_forget;

if (!S_ISREG(inode->i_mode))
@@ -3964,6 +3964,7 @@ static int ocfs2_data_convert_worker(str