diff options
author | \"Talpey, Thomas\ <Thomas.Talpey@netapp.com> | 2007-09-10 13:46:39 -0400 |
---|---|---|
committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-10-09 17:17:42 -0400 |
commit | bc25571e21e8bd053554209f5b1b228ad71e6b99 (patch) | |
tree | 4c008cc445f24c6b5501b2867b8ba7a752b5d710 /net/sunrpc/xprtsock.c | |
parent | 81c098af3da7981902e9f8163aeccc2467c4ba6d (diff) |
SUNRPC: Finish API to load RPC transport implementations dynamically
Allow RPC client transport implementations to be loaded as needed, or
as they become available from distributors or third-party vendors.
Note that we leave the IP sockets implementation in sunrpc.o
permanently, as IP functionality is always available in any
kernel that runs NFS.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Tom Talpey <tmt@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
-rw-r--r-- | net/sunrpc/xprtsock.c | 47 |
1 files changed, 42 insertions, 5 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 5bdce8fa2d5..3bc9c921c82 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -20,6 +20,7 @@ #include <linux/types.h> #include <linux/slab.h> +#include <linux/module.h> #include <linux/capability.h> #include <linux/pagemap.h> #include <linux/errno.h> @@ -777,6 +778,7 @@ static void xs_destroy(struct rpc_xprt *xprt) xs_free_peer_addresses(xprt); kfree(xprt->slot); kfree(xprt); + module_put(THIS_MODULE); } static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) @@ -1782,7 +1784,8 @@ static struct rpc_xprt_ops xs_tcp_ops = { .print_stats = xs_tcp_print_stats, }; -static struct rpc_xprt *xs_setup_xprt(struct rpc_xprtsock_create *args, unsigned int slot_table_size) +static struct rpc_xprt *xs_setup_xprt(struct rpc_xprtsock_create *args, + unsigned int slot_table_size) { struct rpc_xprt *xprt; struct sock_xprt *new; @@ -1876,7 +1879,12 @@ struct rpc_xprt *xs_setup_udp(struct rpc_xprtsock_create *args) dprintk("RPC: set up transport to address %s\n", xprt->address_strings[RPC_DISPLAY_ALL]); - return xprt; + if (try_module_get(THIS_MODULE)) + return xprt; + + kfree(xprt->slot); + kfree(xprt); + return ERR_PTR(-EINVAL); } /** @@ -1934,11 +1942,34 @@ struct rpc_xprt *xs_setup_tcp(struct rpc_xprtsock_create *args) dprintk("RPC: set up transport to address %s\n", xprt->address_strings[RPC_DISPLAY_ALL]); - return 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, + .family = AF_INET, + .protocol = IPPROTO_UDP, + .setup = xs_setup_udp, +}; + +static struct xprt_class xs_tcp_transport = { + .list = LIST_HEAD_INIT(xs_tcp_transport.list), + .name = "tcp", + .owner = THIS_MODULE, + .family = AF_INET, + .protocol = IPPROTO_TCP, + .setup = xs_setup_tcp, +}; + /** - * init_socket_xprt - set up xprtsock's sysctls + * init_socket_xprt - set up xprtsock's sysctls, register with RPC client * */ int init_socket_xprt(void) @@ -1948,11 +1979,14 @@ int init_socket_xprt(void) sunrpc_table_header = register_sysctl_table(sunrpc_table); #endif + xprt_register_transport(&xs_udp_transport); + xprt_register_transport(&xs_tcp_transport); + return 0; } /** - * cleanup_socket_xprt - remove xprtsock's sysctls + * cleanup_socket_xprt - remove xprtsock's sysctls, unregister * */ void cleanup_socket_xprt(void) @@ -1963,4 +1997,7 @@ void cleanup_socket_xprt(void) sunrpc_table_header = NULL; } #endif + + xprt_unregister_transport(&xs_udp_transport); + xprt_unregister_transport(&xs_tcp_transport); } |