diff mbox series

ksmbd: Constify struct ksmbd_transport_ops

Message ID c06ecbfde4cc106603285ed96febf3b887425286.1719160522.git.christophe.jaillet@wanadoo.fr
State New
Headers show
Series ksmbd: Constify struct ksmbd_transport_ops | expand

Commit Message

Christophe JAILLET June 23, 2024, 6:07 p.m. UTC 
'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 <christophe.jaillet@wanadoo.fr>
---
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(-)

Comments

Namjae Jeon June 23, 2024, 11:22 p.m. UTC | #1 
2024년 6월 24일 (월) 오전 3:09, Christophe JAILLET
<christophe.jaillet@wanadoo.fr>님이 작성:
>
> '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 <christophe.jaillet@wanadoo.fr>
Applied it to #ksmbd-for-next-next.
Thanks for your patch!
diff mbox series

Patch

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,