From patchwork Sun Jun 23 18:07:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe JAILLET X-Patchwork-Id: 13708711 Received: from msa.smtpout.orange.fr (smtp-77.smtpout.orange.fr [80.12.242.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F7B52AD22; Sun, 23 Jun 2024 18:09:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.12.242.77 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719166163; cv=none; b=mdQgJt21YgiZfXTnqZO+7uRFRjClNld30A9Fuh8gnDSOrilOnd5Kbdifc4GvLnRD6kNn+JxyBqpYbq+LsJjS6a/ljkj+9+t9+CKfrgM8dgLY1W5+F/FK8PGfdorGgjom1Opios1SJUDrAiY4aUmqtU8CY9ZOhoEOLzoPrgaH6wE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719166163; c=relaxed/simple; bh=J3vMmXnzQe6rhIKhDI1/B7ym+GQlPi5XIJq1ayivNTM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=F6T3cexrO39jfnQG1bPrIbz4/kYVOwqhU123427Rh0Em9mF9v1nBDJh+th/8/QPvNhetTV7itTwRki6ldDJ9u9NOXfPu86CvDHepzzIgMT+hArSnsKEuY+jo0WkKXB97TT0g9UYFbakshY/rp9cgvU/V3pFmOVaS1j3jZPaLEMY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wanadoo.fr; spf=pass smtp.mailfrom=wanadoo.fr; dkim=pass (2048-bit key) header.d=wanadoo.fr header.i=@wanadoo.fr header.b=LOzMV2Ib; arc=none smtp.client-ip=80.12.242.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wanadoo.fr Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=wanadoo.fr Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=wanadoo.fr header.i=@wanadoo.fr header.b="LOzMV2Ib" Received: from fedora.home ([86.243.222.230]) by smtp.orange.fr with ESMTPA id LRdBslRkGqHypLRdCsRNHd; Sun, 23 Jun 2024 20:08:02 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wanadoo.fr; s=t20230301; t=1719166082; bh=zcGRcZWW7cYNaHFvJZxbefnI7dyccoMtktK8GbPAaWk=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=LOzMV2Ib3hYVdxzXTxRS/vIMWOcazC6+fi/DkneBn489NlGZycGOzJqEyKLhkU5xb i8goEQEaHn0Cu7eSsaag/QdckMG25TsdAo5iUkQX0ghm1GiGYqaidXoUDeEH2VhLMG b86ou9M9RHWerz2CUr8QVUkhDKS/V7oteqUklsPqPaO0BrvvJ/qCvnyrNv3kqTYhf+ j6tdSDAEN6n94c4ZGUYeyatz9Hf1ShXgDaHA3u9Nz11hzTd9ctfJnSrm3Dd9gNHJlM vcY42aEGZMUZxNZZoRBPsESbZuWS+5U+71nem5bQrG0+gRqHdzJUrSHdMUPiAt3eWs 9ztcuhYyLnQeA== X-ME-Helo: fedora.home X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sun, 23 Jun 2024 20:08:02 +0200 X-ME-IP: 86.243.222.230 From: Christophe JAILLET To: Namjae Jeon , Steve French , Sergey Senozhatsky , Tom Talpey Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET , linux-cifs@vger.kernel.org Subject: [PATCH] ksmbd: Constify struct ksmbd_transport_ops Date: Sun, 23 Jun 2024 20:07:58 +0200 Message-ID: X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 'struct ksmbd_transport_ops' is not modified in these drivers. Constifying this structure moves some data to a read-only section, so increase overall security. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 52184 2085 256 54525 d4fd fs/smb/server/transport_rdma.o After: ===== text data bss dec hex filename 52260 2021 256 54537 d509 fs/smb/server/transport_rdma.o Signed-off-by: Christophe JAILLET --- Compile tested-only --- fs/smb/server/connection.h | 4 ++-- fs/smb/server/transport_rdma.c | 4 ++-- fs/smb/server/transport_tcp.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/smb/server/connection.h b/fs/smb/server/connection.h index 0e04cf8b1d89..5c2845e47cf2 100644 --- a/fs/smb/server/connection.h +++ b/fs/smb/server/connection.h @@ -133,8 +133,8 @@ struct ksmbd_transport_ops { }; struct ksmbd_transport { - struct ksmbd_conn *conn; - struct ksmbd_transport_ops *ops; + struct ksmbd_conn *conn; + const struct ksmbd_transport_ops *ops; }; #define KSMBD_TCP_RECV_TIMEOUT (7 * HZ) diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c index 8faa25c6e129..cf4418f72772 100644 --- a/fs/smb/server/transport_rdma.c +++ b/fs/smb/server/transport_rdma.c @@ -164,7 +164,7 @@ enum { SMB_DIRECT_MSG_DATA_TRANSFER }; -static struct ksmbd_transport_ops ksmbd_smb_direct_transport_ops; +static const struct ksmbd_transport_ops ksmbd_smb_direct_transport_ops; struct smb_direct_send_ctx { struct list_head msg_list; @@ -2292,7 +2292,7 @@ bool ksmbd_rdma_capable_netdev(struct net_device *netdev) return rdma_capable; } -static struct ksmbd_transport_ops ksmbd_smb_direct_transport_ops = { +static const struct ksmbd_transport_ops ksmbd_smb_direct_transport_ops = { .prepare = smb_direct_prepare, .disconnect = smb_direct_disconnect, .shutdown = smb_direct_shutdown, diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c index 6633fa78e9b9..a84788396daa 100644 --- a/fs/smb/server/transport_tcp.c +++ b/fs/smb/server/transport_tcp.c @@ -37,7 +37,7 @@ struct tcp_transport { unsigned int nr_iov; }; -static struct ksmbd_transport_ops ksmbd_tcp_transport_ops; +static const struct ksmbd_transport_ops ksmbd_tcp_transport_ops; static void tcp_stop_kthread(struct task_struct *kthread); static struct interface *alloc_iface(char *ifname); @@ -649,7 +649,7 @@ int ksmbd_tcp_set_interfaces(char *ifc_list, int ifc_list_sz) return 0; } -static struct ksmbd_transport_ops ksmbd_tcp_transport_ops = { +static const struct ksmbd_transport_ops ksmbd_tcp_transport_ops = { .read = ksmbd_tcp_read, .writev = ksmbd_tcp_writev, .disconnect = ksmbd_tcp_disconnect,