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ksmbd: Constify struct ksmbd_transport_ops

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'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>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Christophe JAILLET 2024-06-23 20:07:58 +02:00 committed by Steve French
parent ac5399d486
commit 051d469be1
3 changed files with 6 additions and 6 deletions
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4
fs/smb/server/connection.h
View file

@ -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)

4
fs/smb/server/transport_rdma.c
View file

@ -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,

4
fs/smb/server/transport_tcp.c
View file

@ -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,