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SUNRPC new transport for the NFSv4.1 shared back channel

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Move the current sock create and destroy routines into the new transport ops.
Back channel socket will be destroyed by the svc_closs_all call in svc_destroy.

Added check: only TCP supported on shared back channel.

Signed-off-by: Andy Adamson <andros@netapp.com>
Acked-by: Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-01-06 02:04:26 +00:00 committed by Trond Myklebust
parent 71e161a6a9
commit 1f11a034cd
3 changed files with 63 additions and 24 deletions
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1
include/linux/sunrpc/svcsock.h
View File

@ -45,6 +45,7 @@ int svc_sock_names(struct svc_serv *serv, char *buf,
int svc_addsock(struct svc_serv *serv, const int fd,
char *name_return, const size_t len);
void svc_init_xprt_sock(void);
void svc_init_bc_xprt_sock(void);
void svc_cleanup_xprt_sock(void);
struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);
void svc_sock_destroy(struct svc_xprt *);

4
net/sunrpc/svc.c
View File

@ -488,10 +488,6 @@ svc_destroy(struct svc_serv *serv)
if (svc_serv_is_pooled(serv))
svc_pool_map_put();
#if defined(CONFIG_NFS_V4_1)
svc_sock_destroy(serv->bc_xprt);
#endif /* CONFIG_NFS_V4_1 */
svc_unregister(serv);
kfree(serv->sv_pools);
kfree(serv);

82
net/sunrpc/svcsock.c
View File

@ -66,6 +66,13 @@ static void svc_sock_free(struct svc_xprt *);
static struct svc_xprt *svc_create_socket(struct svc_serv *, int,
struct net *, struct sockaddr *,
int, int);
#if defined(CONFIG_NFS_V4_1)
static struct svc_xprt *svc_bc_create_socket(struct svc_serv *, int,
struct net *, struct sockaddr *,
int, int);
static void svc_bc_sock_free(struct svc_xprt *xprt);
#endif /* CONFIG_NFS_V4_1 */
#ifdef CONFIG_DEBUG_LOCK_ALLOC
static struct lock_class_key svc_key[2];
static struct lock_class_key svc_slock_key[2];
@ -1184,6 +1191,39 @@ static struct svc_xprt *svc_tcp_create(struct svc_serv *serv,
return svc_create_socket(serv, IPPROTO_TCP, net, sa, salen, flags);
}
#if defined(CONFIG_NFS_V4_1)
static struct svc_xprt *svc_bc_create_socket(struct svc_serv *, int,
struct net *, struct sockaddr *,
int, int);
static void svc_bc_sock_free(struct svc_xprt *xprt);
static struct svc_xprt *svc_bc_tcp_create(struct svc_serv *serv,
struct net *net,
struct sockaddr *sa, int salen,
int flags)
{
return svc_bc_create_socket(serv, IPPROTO_TCP, net, sa, salen, flags);
}
static void svc_bc_tcp_sock_detach(struct svc_xprt *xprt)
{
}
static struct svc_xprt_ops svc_tcp_bc_ops = {
.xpo_create = svc_bc_tcp_create,
.xpo_detach = svc_bc_tcp_sock_detach,
.xpo_free = svc_bc_sock_free,
.xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr,
};
static struct svc_xprt_class svc_tcp_bc_class = {
.xcl_name = "tcp-bc",
.xcl_owner = THIS_MODULE,
.xcl_ops = &svc_tcp_bc_ops,
.xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP,
};
#endif /* CONFIG_NFS_V4_1 */
static struct svc_xprt_ops svc_tcp_ops = {
.xpo_create = svc_tcp_create,
.xpo_recvfrom = svc_tcp_recvfrom,
@ -1509,41 +1549,43 @@ static void svc_sock_free(struct svc_xprt *xprt)
kfree(svsk);
}
#if defined(CONFIG_NFS_V4_1)
/*
* Create a svc_xprt.
*
* For internal use only (e.g. nfsv4.1 backchannel).
* Callers should typically use the xpo_create() method.
* Create a back channel svc_xprt which shares the fore channel socket.
*/
struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot)
static struct svc_xprt *svc_bc_create_socket(struct svc_serv *serv,
int protocol,
struct net *net,
struct sockaddr *sin, int len,
int flags)
{
struct svc_sock *svsk;
struct svc_xprt *xprt = NULL;
struct svc_xprt *xprt;
if (protocol != IPPROTO_TCP) {
printk(KERN_WARNING "svc: only TCP sockets"
" supported on shared back channel\n");
return ERR_PTR(-EINVAL);
}
dprintk("svc: %s\n", __func__);
svsk = kzalloc(sizeof(*svsk), GFP_KERNEL);
if (!svsk)
goto out;
return ERR_PTR(-ENOMEM);
xprt = &svsk->sk_xprt;
if (prot == IPPROTO_TCP)
svc_xprt_init(&svc_tcp_class, xprt, serv);
else if (prot == IPPROTO_UDP)
svc_xprt_init(&svc_udp_class, xprt, serv);
else
BUG();
out:
dprintk("svc: %s return %p\n", __func__, xprt);
svc_xprt_init(&svc_tcp_bc_class, xprt, serv);
serv->bc_xprt = xprt;
return xprt;
}
EXPORT_SYMBOL_GPL(svc_sock_create);
/*
* Destroy a svc_sock.
* Free a back channel svc_sock.
*/
void svc_sock_destroy(struct svc_xprt *xprt)
static void svc_bc_sock_free(struct svc_xprt *xprt)
{
if (xprt)
kfree(container_of(xprt, struct svc_sock, sk_xprt));
}
EXPORT_SYMBOL_GPL(svc_sock_destroy);
#endif /* CONFIG_NFS_V4_1 */