linux-kernel - [PATCH 5.5 67/80] ceph: noacl mount option is effectively ignored

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Message-Id: <20200218190438.385837347@linuxfoundation.org>
Date:   Tue, 18 Feb 2020 20:55:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Xiubo Li <xiubli@...hat.com>,
        Ilya Dryomov <idryomov@...il.com>
Subject: [PATCH 5.5 67/80] ceph: noacl mount option is effectively ignored

From: Xiubo Li <xiubli@...hat.com>

commit 3b20bc2fe4c0cfd82d35838965dc7ff0b93415c6 upstream.

For the old mount API, the module parameters parseing function will
be called in ceph_mount() and also just after the default posix acl
flag set, so we can control to enable/disable it via the mount option.

But for the new mount API, it will call the module parameters
parseing function before ceph_get_tree(), so the posix acl will always
be enabled.

Fixes: 82995cc6c5ae ("libceph, rbd, ceph: convert to use the new mount API")
Signed-off-by: Xiubo Li <xiubli@...hat.com>
Reviewed-by: Ilya Dryomov <idryomov@...il.com>
Signed-off-by: Ilya Dryomov <idryomov@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ceph/super.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -1020,10 +1020,6 @@ static int ceph_get_tree(struct fs_conte
 	if (!fc->source)
 		return invalf(fc, "ceph: No source");
 
-#ifdef CONFIG_CEPH_FS_POSIX_ACL
-	fc->sb_flags |= SB_POSIXACL;
-#endif
-
 	/* create client (which we may/may not use) */
 	fsc = create_fs_client(pctx->opts, pctx->copts);
 	pctx->opts = NULL;
@@ -1141,6 +1137,10 @@ static int ceph_init_fs_context(struct f
 	fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
 	fsopt->congestion_kb = default_congestion_kb();
 
+#ifdef CONFIG_CEPH_FS_POSIX_ACL
+	fc->sb_flags |= SB_POSIXACL;
+#endif
+
 	fc->fs_private = pctx;
 	fc->ops = &ceph_context_ops;
 	return 0;