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nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel

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[sunrpc: change idle timeout value for the backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Alexandros Batsakis 2009-09-10 17:33:30 +03:00 committed by J. Bruce Fields
parent 908329f2c0
commit f300baba5a
6 changed files with 114 additions and 18 deletions
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1
include/linux/sunrpc/clnt.h
View file

@ -114,6 +114,7 @@ struct rpc_create_args {
rpc_authflavor_t authflavor;
unsigned long flags;
char *client_name;
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
};
/* Values for "flags" field */

18
include/linux/sunrpc/xprt.h
View file

@ -124,6 +124,23 @@ struct rpc_xprt_ops {
void (*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq);
};
/*
* RPC transport identifiers
*
* To preserve compatibility with the historical use of raw IP protocol
* id's for transport selection, UDP and TCP identifiers are specified
* with the previous values. No such restriction exists for new transports,
* except that they may not collide with these values (17 and 6,
* respectively).
*/
#define XPRT_TRANSPORT_BC (1 << 31)
enum xprt_transports {
XPRT_TRANSPORT_UDP = IPPROTO_UDP,
XPRT_TRANSPORT_TCP = IPPROTO_TCP,
XPRT_TRANSPORT_BC_TCP = IPPROTO_TCP | XPRT_TRANSPORT_BC,
XPRT_TRANSPORT_RDMA = 256
};
struct rpc_xprt {
struct kref kref; /* Reference count */
struct rpc_xprt_ops * ops; /* transport methods */
@ -232,6 +249,7 @@ struct xprt_create {
struct sockaddr * srcaddr; /* optional local address */
struct sockaddr * dstaddr; /* remote peer address */
size_t addrlen;
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
};
struct xprt_class {

5
include/linux/sunrpc/xprtrdma.h
View file

@ -40,11 +40,6 @@
#ifndef _LINUX_SUNRPC_XPRTRDMA_H
#define _LINUX_SUNRPC_XPRTRDMA_H
/*
* RPC transport identifier for RDMA
*/
#define XPRT_TRANSPORT_RDMA 256
/*
* rpcbind (v3+) RDMA netid.
*/

11
include/linux/sunrpc/xprtsock.h
View file

@ -12,17 +12,6 @@
int init_socket_xprt(void);
void cleanup_socket_xprt(void);
/*
* RPC transport identifiers for UDP, TCP
*
* To preserve compatibility with the historical use of raw IP protocol
* id's for transport selection, these are specified with the previous
* values. No such restriction exists for new transports, except that
* they may not collide with these values (17 and 6, respectively).
*/
#define XPRT_TRANSPORT_UDP IPPROTO_UDP
#define XPRT_TRANSPORT_TCP IPPROTO_TCP
/*
* RPC slot table sizes for UDP, TCP transports
*/

1
net/sunrpc/clnt.c
View file

@ -288,6 +288,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
.srcaddr = args->saddress,
.dstaddr = args->address,
.addrlen = args->addrsize,
.bc_xprt = args->bc_xprt,
};
char servername[48];

96
net/sunrpc/xprtsock.c
View file

@ -2468,11 +2468,93 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
return ERR_PTR(-EINVAL);
}
/**
* xs_setup_bc_tcp - Set up transport to use a TCP backchannel socket
* @args: rpc transport creation arguments
*
*/
static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args)
{
struct sockaddr *addr = args->dstaddr;
struct rpc_xprt *xprt;
struct sock_xprt *transport;
struct svc_sock *bc_sock;
if (!args->bc_xprt)
ERR_PTR(-EINVAL);
xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries);
if (IS_ERR(xprt))
return xprt;
transport = container_of(xprt, struct sock_xprt, xprt);
xprt->prot = IPPROTO_TCP;
xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
xprt->timeout = &xs_tcp_default_timeout;
/* backchannel */
xprt_set_bound(xprt);
xprt->bind_timeout = 0;
xprt->connect_timeout = 0;
xprt->reestablish_timeout = 0;
xprt->idle_timeout = 0;
/*
* The backchannel uses the same socket connection as the
* forechannel
*/
xprt->bc_xprt = args->bc_xprt;
bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt);
bc_sock->sk_bc_xprt = xprt;
transport->sock = bc_sock->sk_sock;
transport->inet = bc_sock->sk_sk;
xprt->ops = &bc_tcp_ops;
switch (addr->sa_family) {
case AF_INET:
xs_format_peer_addresses(xprt, "tcp",
RPCBIND_NETID_TCP);
break;
case AF_INET6:
xs_format_peer_addresses(xprt, "tcp",
RPCBIND_NETID_TCP6);
break;
default:
kfree(xprt);
return ERR_PTR(-EAFNOSUPPORT);
}
if (xprt_bound(xprt))
dprintk("RPC: set up xprt to %s (port %s) via %s\n",
xprt->address_strings[RPC_DISPLAY_ADDR],
xprt->address_strings[RPC_DISPLAY_PORT],
xprt->address_strings[RPC_DISPLAY_PROTO]);
else
dprintk("RPC: set up xprt to %s (autobind) via %s\n",
xprt->address_strings[RPC_DISPLAY_ADDR],
xprt->address_strings[RPC_DISPLAY_PROTO]);
/*
* Since we don't want connections for the backchannel, we set
* the xprt status to connected
*/
xprt_set_connected(xprt);
if (try_module_get(THIS_MODULE))
return xprt;
kfree(xprt->slot);
kfree(xprt);
return ERR_PTR(-EINVAL);
}
static struct xprt_class xs_udp_transport = {
.list = LIST_HEAD_INIT(xs_udp_transport.list),
.name = "udp",
.owner = THIS_MODULE,
.ident = IPPROTO_UDP,
.ident = XPRT_TRANSPORT_UDP,
.setup = xs_setup_udp,
};
@ -2480,10 +2562,18 @@ static struct xprt_class xs_tcp_transport = {
.list = LIST_HEAD_INIT(xs_tcp_transport.list),
.name = "tcp",
.owner = THIS_MODULE,
.ident = IPPROTO_TCP,
.ident = XPRT_TRANSPORT_TCP,
.setup = xs_setup_tcp,
};
static struct xprt_class xs_bc_tcp_transport = {
.list = LIST_HEAD_INIT(xs_bc_tcp_transport.list),
.name = "tcp NFSv4.1 backchannel",
.owner = THIS_MODULE,
.ident = XPRT_TRANSPORT_BC_TCP,
.setup = xs_setup_bc_tcp,
};
/**
* init_socket_xprt - set up xprtsock's sysctls, register with RPC client
*
@ -2497,6 +2587,7 @@ int init_socket_xprt(void)
xprt_register_transport(&xs_udp_transport);
xprt_register_transport(&xs_tcp_transport);
xprt_register_transport(&xs_bc_tcp_transport);
return 0;
}
@ -2516,6 +2607,7 @@ void cleanup_socket_xprt(void)
xprt_unregister_transport(&xs_udp_transport);
xprt_unregister_transport(&xs_tcp_transport);
xprt_unregister_transport(&xs_bc_tcp_transport);
}
static int param_set_uint_minmax(const char *val, struct kernel_param *kp,