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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/sunrpc/pmap_clnt.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'net/sunrpc/pmap_clnt.c')
-rw-r--r-- | net/sunrpc/pmap_clnt.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/net/sunrpc/pmap_clnt.c b/net/sunrpc/pmap_clnt.c new file mode 100644 index 0000000..d0b1d2c --- /dev/null +++ b/net/sunrpc/pmap_clnt.c @@ -0,0 +1,298 @@ +/* + * linux/net/sunrpc/pmap.c + * + * Portmapper client. + * + * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/socket.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/uio.h> +#include <linux/in.h> +#include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/sched.h> + +#ifdef RPC_DEBUG +# define RPCDBG_FACILITY RPCDBG_PMAP +#endif + +#define PMAP_SET 1 +#define PMAP_UNSET 2 +#define PMAP_GETPORT 3 + +static struct rpc_procinfo pmap_procedures[]; +static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int); +static void pmap_getport_done(struct rpc_task *); +static struct rpc_program pmap_program; +static DEFINE_SPINLOCK(pmap_lock); + +/* + * Obtain the port for a given RPC service on a given host. This one can + * be called for an ongoing RPC request. + */ +void +rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt) +{ + struct rpc_portmap *map = clnt->cl_pmap; + struct sockaddr_in *sap = &clnt->cl_xprt->addr; + struct rpc_message msg = { + .rpc_proc = &pmap_procedures[PMAP_GETPORT], + .rpc_argp = map, + .rpc_resp = &clnt->cl_port, + .rpc_cred = NULL + }; + struct rpc_clnt *pmap_clnt; + struct rpc_task *child; + + dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n", + task->tk_pid, clnt->cl_server, + map->pm_prog, map->pm_vers, map->pm_prot); + + spin_lock(&pmap_lock); + if (map->pm_binding) { + rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL); + spin_unlock(&pmap_lock); + return; + } + map->pm_binding = 1; + spin_unlock(&pmap_lock); + + pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot); + if (IS_ERR(pmap_clnt)) { + task->tk_status = PTR_ERR(pmap_clnt); + goto bailout; + } + task->tk_status = 0; + + /* + * Note: rpc_new_child will release client after a failure. + */ + if (!(child = rpc_new_child(pmap_clnt, task))) + goto bailout; + + /* Setup the call info struct */ + rpc_call_setup(child, &msg, 0); + + /* ... and run the child task */ + rpc_run_child(task, child, pmap_getport_done); + return; + +bailout: + spin_lock(&pmap_lock); + map->pm_binding = 0; + rpc_wake_up(&map->pm_bindwait); + spin_unlock(&pmap_lock); + task->tk_status = -EIO; + task->tk_action = NULL; +} + +#ifdef CONFIG_ROOT_NFS +int +rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot) +{ + struct rpc_portmap map = { + .pm_prog = prog, + .pm_vers = vers, + .pm_prot = prot, + .pm_port = 0 + }; + struct rpc_clnt *pmap_clnt; + char hostname[32]; + int status; + + dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n", + NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot); + + sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr)); + pmap_clnt = pmap_create(hostname, sin, prot); + if (IS_ERR(pmap_clnt)) + return PTR_ERR(pmap_clnt); + + /* Setup the call info struct */ + status = rpc_call(pmap_clnt, PMAP_GETPORT, &map, &map.pm_port, 0); + + if (status >= 0) { + if (map.pm_port != 0) + return map.pm_port; + status = -EACCES; + } + return status; +} +#endif + +static void +pmap_getport_done(struct rpc_task *task) +{ + struct rpc_clnt *clnt = task->tk_client; + struct rpc_portmap *map = clnt->cl_pmap; + + dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n", + task->tk_pid, task->tk_status, clnt->cl_port); + if (task->tk_status < 0) { + /* Make the calling task exit with an error */ + task->tk_action = NULL; + } else if (clnt->cl_port == 0) { + /* Program not registered */ + task->tk_status = -EACCES; + task->tk_action = NULL; + } else { + /* byte-swap port number first */ + clnt->cl_port = htons(clnt->cl_port); + clnt->cl_xprt->addr.sin_port = clnt->cl_port; + } + spin_lock(&pmap_lock); + map->pm_binding = 0; + rpc_wake_up(&map->pm_bindwait); + spin_unlock(&pmap_lock); +} + +/* + * Set or unset a port registration with the local portmapper. + * port == 0 means unregister, port != 0 means register. + */ +int +rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay) +{ + struct sockaddr_in sin; + struct rpc_portmap map; + struct rpc_clnt *pmap_clnt; + int error = 0; + + dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n", + prog, vers, prot, port); + + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); + pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP); + if (IS_ERR(pmap_clnt)) { + error = PTR_ERR(pmap_clnt); + dprintk("RPC: couldn't create pmap client. Error = %d\n", error); + return error; + } + + map.pm_prog = prog; + map.pm_vers = vers; + map.pm_prot = prot; + map.pm_port = port; + + error = rpc_call(pmap_clnt, port? PMAP_SET : PMAP_UNSET, + &map, okay, 0); + + if (error < 0) { + printk(KERN_WARNING + "RPC: failed to contact portmap (errno %d).\n", + error); + } + dprintk("RPC: registration status %d/%d\n", error, *okay); + + /* Client deleted automatically because cl_oneshot == 1 */ + return error; +} + +static struct rpc_clnt * +pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto) +{ + struct rpc_xprt *xprt; + struct rpc_clnt *clnt; + + /* printk("pmap: create xprt\n"); */ + xprt = xprt_create_proto(proto, srvaddr, NULL); + if (IS_ERR(xprt)) + return (struct rpc_clnt *)xprt; + xprt->addr.sin_port = htons(RPC_PMAP_PORT); + + /* printk("pmap: create clnt\n"); */ + clnt = rpc_create_client(xprt, hostname, + &pmap_program, RPC_PMAP_VERSION, + RPC_AUTH_UNIX); + if (IS_ERR(clnt)) { + xprt_destroy(xprt); + } else { + clnt->cl_softrtry = 1; + clnt->cl_chatty = 1; + clnt->cl_oneshot = 1; + } + return clnt; +} + +/* + * XDR encode/decode functions for PMAP + */ +static int +xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map) +{ + dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n", + map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port); + *p++ = htonl(map->pm_prog); + *p++ = htonl(map->pm_vers); + *p++ = htonl(map->pm_prot); + *p++ = htonl(map->pm_port); + + req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + return 0; +} + +static int +xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp) +{ + *portp = (unsigned short) ntohl(*p++); + return 0; +} + +static int +xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp) +{ + *boolp = (unsigned int) ntohl(*p++); + return 0; +} + +static struct rpc_procinfo pmap_procedures[] = { +[PMAP_SET] = { + .p_proc = PMAP_SET, + .p_encode = (kxdrproc_t) xdr_encode_mapping, + .p_decode = (kxdrproc_t) xdr_decode_bool, + .p_bufsiz = 4, + .p_count = 1, + }, +[PMAP_UNSET] = { + .p_proc = PMAP_UNSET, + .p_encode = (kxdrproc_t) xdr_encode_mapping, + .p_decode = (kxdrproc_t) xdr_decode_bool, + .p_bufsiz = 4, + .p_count = 1, + }, +[PMAP_GETPORT] = { + .p_proc = PMAP_GETPORT, + .p_encode = (kxdrproc_t) xdr_encode_mapping, + .p_decode = (kxdrproc_t) xdr_decode_port, + .p_bufsiz = 4, + .p_count = 1, + }, +}; + +static struct rpc_version pmap_version2 = { + .number = 2, + .nrprocs = 4, + .procs = pmap_procedures +}; + +static struct rpc_version * pmap_version[] = { + NULL, + NULL, + &pmap_version2 +}; + +static struct rpc_stat pmap_stats; + +static struct rpc_program pmap_program = { + .name = "portmap", + .number = RPC_PMAP_PROGRAM, + .nrvers = ARRAY_SIZE(pmap_version), + .version = pmap_version, + .stats = &pmap_stats, +}; |