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@xxxxxxxxxx>
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@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>
---
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@xxxxxxxxxx are
ocfs2-drop-acl-cache-for-directories-too.patch
