Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1 | /* |
| 2 | * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind |
| 3 | * protocol |
| 4 | * |
| 5 | * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and |
| 6 | * RFC 3530: "Network File System (NFS) version 4 Protocol" |
| 7 | * |
| 8 | * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net> |
| 9 | * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com> |
| 10 | * |
| 11 | * Descended from net/sunrpc/pmap_clnt.c, |
| 12 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
| 13 | */ |
| 14 | |
Chuck Lever | cce63cd | 2007-07-01 12:13:12 -0400 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/socket.h> |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 19 | #include <linux/un.h> |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 20 | #include <linux/in.h> |
| 21 | #include <linux/in6.h> |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 22 | #include <linux/kernel.h> |
| 23 | #include <linux/errno.h> |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 24 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 26 | #include <linux/nsproxy.h> |
Chuck Lever | 9d548b9 | 2008-09-15 16:27:30 -0500 | [diff] [blame] | 27 | #include <net/ipv6.h> |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 28 | |
| 29 | #include <linux/sunrpc/clnt.h> |
| 30 | #include <linux/sunrpc/sched.h> |
\"Talpey, Thomas\ | 0896a72 | 2007-09-10 13:48:23 -0400 | [diff] [blame] | 31 | #include <linux/sunrpc/xprtsock.h> |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 32 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 33 | #include "netns.h" |
| 34 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 35 | #ifdef RPC_DEBUG |
| 36 | # define RPCDBG_FACILITY RPCDBG_BIND |
| 37 | #endif |
| 38 | |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 39 | #define RPCBIND_SOCK_PATHNAME "/var/run/rpcbind.sock" |
| 40 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 41 | #define RPCBIND_PROGRAM (100000u) |
| 42 | #define RPCBIND_PORT (111u) |
| 43 | |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 44 | #define RPCBVERS_2 (2u) |
| 45 | #define RPCBVERS_3 (3u) |
| 46 | #define RPCBVERS_4 (4u) |
| 47 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 48 | enum { |
| 49 | RPCBPROC_NULL, |
| 50 | RPCBPROC_SET, |
| 51 | RPCBPROC_UNSET, |
| 52 | RPCBPROC_GETPORT, |
| 53 | RPCBPROC_GETADDR = 3, /* alias for GETPORT */ |
| 54 | RPCBPROC_DUMP, |
| 55 | RPCBPROC_CALLIT, |
| 56 | RPCBPROC_BCAST = 5, /* alias for CALLIT */ |
| 57 | RPCBPROC_GETTIME, |
| 58 | RPCBPROC_UADDR2TADDR, |
| 59 | RPCBPROC_TADDR2UADDR, |
| 60 | RPCBPROC_GETVERSADDR, |
| 61 | RPCBPROC_INDIRECT, |
| 62 | RPCBPROC_GETADDRLIST, |
| 63 | RPCBPROC_GETSTAT, |
| 64 | }; |
| 65 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 66 | /* |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 67 | * r_owner |
| 68 | * |
| 69 | * The "owner" is allowed to unset a service in the rpcbind database. |
Chuck Lever | 126e4bc | 2009-03-18 20:47:14 -0400 | [diff] [blame] | 70 | * |
| 71 | * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a |
| 72 | * UID which it maps to a local user name via a password lookup. |
| 73 | * In all other cases it is ignored. |
| 74 | * |
| 75 | * For SET/UNSET requests, user space provides a value, even for |
| 76 | * network requests, and GETADDR uses an empty string. We follow |
| 77 | * those precedents here. |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 78 | */ |
Chuck Lever | 126e4bc | 2009-03-18 20:47:14 -0400 | [diff] [blame] | 79 | #define RPCB_OWNER_STRING "0" |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 80 | #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) |
| 81 | |
Chuck Lever | 0b10bf5 | 2009-08-09 15:09:33 -0400 | [diff] [blame] | 82 | /* |
| 83 | * XDR data type sizes |
| 84 | */ |
| 85 | #define RPCB_program_sz (1) |
| 86 | #define RPCB_version_sz (1) |
| 87 | #define RPCB_protocol_sz (1) |
| 88 | #define RPCB_port_sz (1) |
| 89 | #define RPCB_boolean_sz (1) |
| 90 | |
| 91 | #define RPCB_netid_sz (1 + XDR_QUADLEN(RPCBIND_MAXNETIDLEN)) |
| 92 | #define RPCB_addr_sz (1 + XDR_QUADLEN(RPCBIND_MAXUADDRLEN)) |
| 93 | #define RPCB_ownerstring_sz (1 + XDR_QUADLEN(RPCB_MAXOWNERLEN)) |
| 94 | |
| 95 | /* |
| 96 | * XDR argument and result sizes |
| 97 | */ |
| 98 | #define RPCB_mappingargs_sz (RPCB_program_sz + RPCB_version_sz + \ |
| 99 | RPCB_protocol_sz + RPCB_port_sz) |
| 100 | #define RPCB_getaddrargs_sz (RPCB_program_sz + RPCB_version_sz + \ |
| 101 | RPCB_netid_sz + RPCB_addr_sz + \ |
| 102 | RPCB_ownerstring_sz) |
| 103 | |
| 104 | #define RPCB_getportres_sz RPCB_port_sz |
| 105 | #define RPCB_setres_sz RPCB_boolean_sz |
| 106 | |
| 107 | /* |
| 108 | * Note that RFC 1833 does not put any size restrictions on the |
| 109 | * address string returned by the remote rpcbind database. |
| 110 | */ |
| 111 | #define RPCB_getaddrres_sz RPCB_addr_sz |
| 112 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 113 | static void rpcb_getport_done(struct rpc_task *, void *); |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 114 | static void rpcb_map_release(void *data); |
Adrian Bunk | 7f4adef | 2007-06-13 01:03:13 +0200 | [diff] [blame] | 115 | static struct rpc_program rpcb_program; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 116 | |
| 117 | struct rpcbind_args { |
| 118 | struct rpc_xprt * r_xprt; |
| 119 | |
| 120 | u32 r_prog; |
| 121 | u32 r_vers; |
| 122 | u32 r_prot; |
| 123 | unsigned short r_port; |
Trond Myklebust | 86d61d8 | 2008-01-07 21:16:56 -0500 | [diff] [blame] | 124 | const char * r_netid; |
| 125 | const char * r_addr; |
| 126 | const char * r_owner; |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 127 | |
| 128 | int r_status; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 129 | }; |
| 130 | |
| 131 | static struct rpc_procinfo rpcb_procedures2[]; |
| 132 | static struct rpc_procinfo rpcb_procedures3[]; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 133 | static struct rpc_procinfo rpcb_procedures4[]; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 134 | |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 135 | struct rpcb_info { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 136 | u32 rpc_vers; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 137 | struct rpc_procinfo * rpc_proc; |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 138 | }; |
| 139 | |
| 140 | static struct rpcb_info rpcb_next_version[]; |
| 141 | static struct rpcb_info rpcb_next_version6[]; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 142 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 143 | static const struct rpc_call_ops rpcb_getport_ops = { |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 144 | .rpc_call_done = rpcb_getport_done, |
| 145 | .rpc_release = rpcb_map_release, |
| 146 | }; |
| 147 | |
| 148 | static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status) |
| 149 | { |
| 150 | xprt_clear_binding(xprt); |
| 151 | rpc_wake_up_status(&xprt->binding, status); |
| 152 | } |
| 153 | |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 154 | static void rpcb_map_release(void *data) |
| 155 | { |
| 156 | struct rpcbind_args *map = data; |
| 157 | |
| 158 | rpcb_wake_rpcbind_waiters(map->r_xprt, map->r_status); |
| 159 | xprt_put(map->r_xprt); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 160 | kfree(map->r_addr); |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 161 | kfree(map); |
| 162 | } |
| 163 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 164 | static int rpcb_get_local(struct net *net) |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 165 | { |
| 166 | int cnt; |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 167 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 168 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 169 | spin_lock(&sn->rpcb_clnt_lock); |
| 170 | if (sn->rpcb_users) |
| 171 | sn->rpcb_users++; |
| 172 | cnt = sn->rpcb_users; |
| 173 | spin_unlock(&sn->rpcb_clnt_lock); |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 174 | |
| 175 | return cnt; |
| 176 | } |
| 177 | |
Stanislav Kinsbursky | f7a30c1 | 2012-01-13 12:52:51 +0400 | [diff] [blame] | 178 | void rpcb_put_local(struct net *net) |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 179 | { |
Stanislav Kinsbursky | f7a30c1 | 2012-01-13 12:52:51 +0400 | [diff] [blame] | 180 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 181 | struct rpc_clnt *clnt = sn->rpcb_local_clnt; |
| 182 | struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4; |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 183 | int shutdown; |
| 184 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 185 | spin_lock(&sn->rpcb_clnt_lock); |
| 186 | if (--sn->rpcb_users == 0) { |
| 187 | sn->rpcb_local_clnt = NULL; |
| 188 | sn->rpcb_local_clnt4 = NULL; |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 189 | } |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 190 | shutdown = !sn->rpcb_users; |
| 191 | spin_unlock(&sn->rpcb_clnt_lock); |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 192 | |
| 193 | if (shutdown) { |
| 194 | /* |
| 195 | * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister |
| 196 | */ |
| 197 | if (clnt4) |
| 198 | rpc_shutdown_client(clnt4); |
| 199 | if (clnt) |
| 200 | rpc_shutdown_client(clnt); |
| 201 | } |
| 202 | } |
| 203 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 204 | static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt, |
| 205 | struct rpc_clnt *clnt4) |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 206 | { |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 207 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 208 | |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 209 | /* Protected by rpcb_create_local_mutex */ |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 210 | sn->rpcb_local_clnt = clnt; |
| 211 | sn->rpcb_local_clnt4 = clnt4; |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 212 | smp_wmb(); |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 213 | sn->rpcb_users = 1; |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 214 | dprintk("RPC: created new rpcb local clients (rpcb_local_clnt: " |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 215 | "%p, rpcb_local_clnt4: %p) for net %p%s\n", |
| 216 | sn->rpcb_local_clnt, sn->rpcb_local_clnt4, |
| 217 | net, (net == &init_net) ? " (init_net)" : ""); |
Stanislav Kinsbursky | 914edb1 | 2011-10-25 14:16:36 +0300 | [diff] [blame] | 218 | } |
| 219 | |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 220 | /* |
| 221 | * Returns zero on success, otherwise a negative errno value |
| 222 | * is returned. |
| 223 | */ |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 224 | static int rpcb_create_local_unix(struct net *net) |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 225 | { |
| 226 | static const struct sockaddr_un rpcb_localaddr_rpcbind = { |
| 227 | .sun_family = AF_LOCAL, |
| 228 | .sun_path = RPCBIND_SOCK_PATHNAME, |
| 229 | }; |
| 230 | struct rpc_create_args args = { |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 231 | .net = net, |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 232 | .protocol = XPRT_TRANSPORT_LOCAL, |
| 233 | .address = (struct sockaddr *)&rpcb_localaddr_rpcbind, |
| 234 | .addrsize = sizeof(rpcb_localaddr_rpcbind), |
| 235 | .servername = "localhost", |
| 236 | .program = &rpcb_program, |
| 237 | .version = RPCBVERS_2, |
| 238 | .authflavor = RPC_AUTH_NULL, |
| 239 | }; |
| 240 | struct rpc_clnt *clnt, *clnt4; |
| 241 | int result = 0; |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 242 | |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 243 | /* |
| 244 | * Because we requested an RPC PING at transport creation time, |
| 245 | * this works only if the user space portmapper is rpcbind, and |
| 246 | * it's listening on AF_LOCAL on the named socket. |
| 247 | */ |
| 248 | clnt = rpc_create(&args); |
| 249 | if (IS_ERR(clnt)) { |
| 250 | dprintk("RPC: failed to create AF_LOCAL rpcbind " |
| 251 | "client (errno %ld).\n", PTR_ERR(clnt)); |
| 252 | result = -PTR_ERR(clnt); |
| 253 | goto out; |
| 254 | } |
| 255 | |
| 256 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); |
| 257 | if (IS_ERR(clnt4)) { |
| 258 | dprintk("RPC: failed to bind second program to " |
| 259 | "rpcbind v4 client (errno %ld).\n", |
| 260 | PTR_ERR(clnt4)); |
| 261 | clnt4 = NULL; |
| 262 | } |
| 263 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 264 | rpcb_set_local(net, clnt, clnt4); |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 265 | |
| 266 | out: |
| 267 | return result; |
| 268 | } |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 269 | |
| 270 | /* |
| 271 | * Returns zero on success, otherwise a negative errno value |
| 272 | * is returned. |
| 273 | */ |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 274 | static int rpcb_create_local_net(struct net *net) |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 275 | { |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 276 | static const struct sockaddr_in rpcb_inaddr_loopback = { |
| 277 | .sin_family = AF_INET, |
| 278 | .sin_addr.s_addr = htonl(INADDR_LOOPBACK), |
| 279 | .sin_port = htons(RPCBIND_PORT), |
| 280 | }; |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 281 | struct rpc_create_args args = { |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 282 | .net = net, |
Chuck Lever | 2a76b3b | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 283 | .protocol = XPRT_TRANSPORT_TCP, |
Chuck Lever | 5a46211 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 284 | .address = (struct sockaddr *)&rpcb_inaddr_loopback, |
| 285 | .addrsize = sizeof(rpcb_inaddr_loopback), |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 286 | .servername = "localhost", |
| 287 | .program = &rpcb_program, |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 288 | .version = RPCBVERS_2, |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 289 | .authflavor = RPC_AUTH_UNIX, |
| 290 | .flags = RPC_CLNT_CREATE_NOPING, |
| 291 | }; |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 292 | struct rpc_clnt *clnt, *clnt4; |
| 293 | int result = 0; |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 294 | |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 295 | clnt = rpc_create(&args); |
| 296 | if (IS_ERR(clnt)) { |
| 297 | dprintk("RPC: failed to create local rpcbind " |
| 298 | "client (errno %ld).\n", PTR_ERR(clnt)); |
| 299 | result = -PTR_ERR(clnt); |
| 300 | goto out; |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * This results in an RPC ping. On systems running portmapper, |
| 305 | * the v4 ping will fail. Proceed anyway, but disallow rpcb |
| 306 | * v4 upcalls. |
| 307 | */ |
| 308 | clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4); |
| 309 | if (IS_ERR(clnt4)) { |
Chuck Lever | 3835935 | 2010-09-21 16:55:48 -0400 | [diff] [blame] | 310 | dprintk("RPC: failed to bind second program to " |
| 311 | "rpcbind v4 client (errno %ld).\n", |
| 312 | PTR_ERR(clnt4)); |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 313 | clnt4 = NULL; |
| 314 | } |
| 315 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 316 | rpcb_set_local(net, clnt, clnt4); |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 317 | |
| 318 | out: |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 319 | return result; |
| 320 | } |
| 321 | |
| 322 | /* |
| 323 | * Returns zero on success, otherwise a negative errno value |
| 324 | * is returned. |
| 325 | */ |
Stanislav Kinsbursky | f7a30c1 | 2012-01-13 12:52:51 +0400 | [diff] [blame] | 326 | int rpcb_create_local(struct net *net) |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 327 | { |
| 328 | static DEFINE_MUTEX(rpcb_create_local_mutex); |
| 329 | int result = 0; |
| 330 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 331 | if (rpcb_get_local(net)) |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 332 | return result; |
| 333 | |
| 334 | mutex_lock(&rpcb_create_local_mutex); |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 335 | if (rpcb_get_local(net)) |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 336 | goto out; |
| 337 | |
Stanislav Kinsbursky | 2ea75a1 | 2012-01-13 12:52:18 +0400 | [diff] [blame] | 338 | if (rpcb_create_local_unix(net) != 0) |
| 339 | result = rpcb_create_local_net(net); |
Chuck Lever | 7402ab19 | 2011-05-09 15:22:55 -0400 | [diff] [blame] | 340 | |
| 341 | out: |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 342 | mutex_unlock(&rpcb_create_local_mutex); |
| 343 | return result; |
Chuck Lever | cc5598b | 2008-07-14 16:03:27 -0400 | [diff] [blame] | 344 | } |
| 345 | |
Stanislav Kinsbursky | c2550e0 | 2012-01-13 12:52:35 +0400 | [diff] [blame] | 346 | static struct rpc_clnt *rpcb_create(struct net *net, char *hostname, |
| 347 | struct sockaddr *srvaddr, size_t salen, |
| 348 | int proto, u32 version) |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 349 | { |
| 350 | struct rpc_create_args args = { |
Stanislav Kinsbursky | c2550e0 | 2012-01-13 12:52:35 +0400 | [diff] [blame] | 351 | .net = net, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 352 | .protocol = proto, |
| 353 | .address = srvaddr, |
Chuck Lever | 9f6ad26 | 2007-12-10 14:56:31 -0500 | [diff] [blame] | 354 | .addrsize = salen, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 355 | .servername = hostname, |
| 356 | .program = &rpcb_program, |
| 357 | .version = version, |
| 358 | .authflavor = RPC_AUTH_UNIX, |
Chuck Lever | 423d8b0 | 2008-07-14 16:03:28 -0400 | [diff] [blame] | 359 | .flags = (RPC_CLNT_CREATE_NOPING | |
| 360 | RPC_CLNT_CREATE_NONPRIVPORT), |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 361 | }; |
| 362 | |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 363 | switch (srvaddr->sa_family) { |
| 364 | case AF_INET: |
| 365 | ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT); |
| 366 | break; |
| 367 | case AF_INET6: |
| 368 | ((struct sockaddr_in6 *)srvaddr)->sin6_port = htons(RPCBIND_PORT); |
| 369 | break; |
| 370 | default: |
Pavel Emelyanov | c636b57 | 2010-10-06 13:45:56 +0400 | [diff] [blame] | 371 | return ERR_PTR(-EAFNOSUPPORT); |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 372 | } |
| 373 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 374 | return rpc_create(&args); |
| 375 | } |
| 376 | |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 377 | static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg) |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 378 | { |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 379 | int result, error = 0; |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 380 | |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 381 | msg->rpc_resp = &result; |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 382 | |
Chuck Lever | 2a76b3b | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 383 | error = rpc_call_sync(clnt, msg, RPC_TASK_SOFTCONN); |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 384 | if (error < 0) { |
Chuck Lever | 363f724 | 2009-03-18 20:47:44 -0400 | [diff] [blame] | 385 | dprintk("RPC: failed to contact local rpcbind " |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 386 | "server (errno %d).\n", -error); |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 387 | return error; |
| 388 | } |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 389 | |
Chuck Lever | db820d6 | 2008-09-25 11:57:05 -0400 | [diff] [blame] | 390 | if (!result) |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 391 | return -EACCES; |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 392 | return 0; |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 393 | } |
| 394 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 395 | /** |
| 396 | * rpcb_register - set or unset a port registration with the local rpcbind svc |
| 397 | * @prog: RPC program number to bind |
| 398 | * @vers: RPC version number to bind |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 399 | * @prot: transport protocol to register |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 400 | * @port: port value to register |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 401 | * |
| 402 | * Returns zero if the registration request was dispatched successfully |
| 403 | * and the rpcbind daemon returned success. Otherwise, returns an errno |
| 404 | * value that reflects the nature of the error (request could not be |
| 405 | * dispatched, timed out, or rpcbind returned an error). |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 406 | * |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 407 | * RPC services invoke this function to advertise their contact |
| 408 | * information via the system's rpcbind daemon. RPC services |
| 409 | * invoke this function once for each [program, version, transport] |
| 410 | * tuple they wish to advertise. |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 411 | * |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 412 | * Callers may also unregister RPC services that are no longer |
| 413 | * available by setting the passed-in port to zero. This removes |
| 414 | * all registered transports for [program, version] from the local |
| 415 | * rpcbind database. |
| 416 | * |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 417 | * This function uses rpcbind protocol version 2 to contact the |
| 418 | * local rpcbind daemon. |
| 419 | * |
| 420 | * Registration works over both AF_INET and AF_INET6, and services |
| 421 | * registered via this function are advertised as available for any |
| 422 | * address. If the local rpcbind daemon is listening on AF_INET6, |
| 423 | * services registered via this function will be advertised on |
| 424 | * IN6ADDR_ANY (ie available for all AF_INET and AF_INET6 |
| 425 | * addresses). |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 426 | */ |
Stanislav Kinsbursky | 977ac31 | 2012-01-13 12:52:43 +0400 | [diff] [blame] | 427 | int rpcb_register(struct net *net, u32 prog, u32 vers, int prot, unsigned short port) |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 428 | { |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 429 | struct rpcbind_args map = { |
| 430 | .r_prog = prog, |
| 431 | .r_vers = vers, |
| 432 | .r_prot = prot, |
| 433 | .r_port = port, |
| 434 | }; |
| 435 | struct rpc_message msg = { |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 436 | .rpc_argp = &map, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 437 | }; |
Stanislav Kinsbursky | 977ac31 | 2012-01-13 12:52:43 +0400 | [diff] [blame] | 438 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 439 | |
| 440 | dprintk("RPC: %sregistering (%u, %u, %d, %u) with local " |
| 441 | "rpcbind\n", (port ? "" : "un"), |
| 442 | prog, vers, prot, port); |
| 443 | |
Chuck Lever | babe80e | 2008-07-14 16:03:29 -0400 | [diff] [blame] | 444 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_UNSET]; |
| 445 | if (port) |
| 446 | msg.rpc_proc = &rpcb_procedures2[RPCBPROC_SET]; |
| 447 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 448 | return rpcb_register_call(sn->rpcb_local_clnt, &msg); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 449 | } |
| 450 | |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 451 | /* |
| 452 | * Fill in AF_INET family-specific arguments to register |
| 453 | */ |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 454 | static int rpcb_register_inet4(struct sunrpc_net *sn, |
| 455 | const struct sockaddr *sap, |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 456 | struct rpc_message *msg) |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 457 | { |
Chuck Lever | 3aba455 | 2009-03-18 20:47:06 -0400 | [diff] [blame] | 458 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sap; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 459 | struct rpcbind_args *map = msg->rpc_argp; |
Chuck Lever | 3aba455 | 2009-03-18 20:47:06 -0400 | [diff] [blame] | 460 | unsigned short port = ntohs(sin->sin_port); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 461 | int result; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 462 | |
Trond Myklebust | d77385f | 2011-10-17 16:08:10 -0700 | [diff] [blame] | 463 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 464 | |
| 465 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " |
| 466 | "local rpcbind\n", (port ? "" : "un"), |
| 467 | map->r_prog, map->r_vers, |
| 468 | map->r_addr, map->r_netid); |
| 469 | |
| 470 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; |
| 471 | if (port) |
| 472 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
| 473 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 474 | result = rpcb_register_call(sn->rpcb_local_clnt4, msg); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 475 | kfree(map->r_addr); |
| 476 | return result; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | /* |
| 480 | * Fill in AF_INET6 family-specific arguments to register |
| 481 | */ |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 482 | static int rpcb_register_inet6(struct sunrpc_net *sn, |
| 483 | const struct sockaddr *sap, |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 484 | struct rpc_message *msg) |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 485 | { |
Chuck Lever | 3aba455 | 2009-03-18 20:47:06 -0400 | [diff] [blame] | 486 | const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 487 | struct rpcbind_args *map = msg->rpc_argp; |
Chuck Lever | 3aba455 | 2009-03-18 20:47:06 -0400 | [diff] [blame] | 488 | unsigned short port = ntohs(sin6->sin6_port); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 489 | int result; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 490 | |
Trond Myklebust | d77385f | 2011-10-17 16:08:10 -0700 | [diff] [blame] | 491 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_KERNEL); |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 492 | |
| 493 | dprintk("RPC: %sregistering [%u, %u, %s, '%s'] with " |
| 494 | "local rpcbind\n", (port ? "" : "un"), |
| 495 | map->r_prog, map->r_vers, |
| 496 | map->r_addr, map->r_netid); |
| 497 | |
| 498 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; |
| 499 | if (port) |
| 500 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_SET]; |
| 501 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 502 | result = rpcb_register_call(sn->rpcb_local_clnt4, msg); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 503 | kfree(map->r_addr); |
| 504 | return result; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 505 | } |
| 506 | |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 507 | static int rpcb_unregister_all_protofamilies(struct sunrpc_net *sn, |
| 508 | struct rpc_message *msg) |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 509 | { |
| 510 | struct rpcbind_args *map = msg->rpc_argp; |
| 511 | |
| 512 | dprintk("RPC: unregistering [%u, %u, '%s'] with " |
| 513 | "local rpcbind\n", |
| 514 | map->r_prog, map->r_vers, map->r_netid); |
| 515 | |
| 516 | map->r_addr = ""; |
| 517 | msg->rpc_proc = &rpcb_procedures4[RPCBPROC_UNSET]; |
| 518 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 519 | return rpcb_register_call(sn->rpcb_local_clnt4, msg); |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 520 | } |
| 521 | |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 522 | /** |
| 523 | * rpcb_v4_register - set or unset a port registration with the local rpcbind |
| 524 | * @program: RPC program number of service to (un)register |
| 525 | * @version: RPC version number of service to (un)register |
| 526 | * @address: address family, IP address, and port to (un)register |
| 527 | * @netid: netid of transport protocol to (un)register |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 528 | * |
| 529 | * Returns zero if the registration request was dispatched successfully |
| 530 | * and the rpcbind daemon returned success. Otherwise, returns an errno |
| 531 | * value that reflects the nature of the error (request could not be |
| 532 | * dispatched, timed out, or rpcbind returned an error). |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 533 | * |
| 534 | * RPC services invoke this function to advertise their contact |
| 535 | * information via the system's rpcbind daemon. RPC services |
| 536 | * invoke this function once for each [program, version, address, |
| 537 | * netid] tuple they wish to advertise. |
| 538 | * |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 539 | * Callers may also unregister RPC services that are registered at a |
| 540 | * specific address by setting the port number in @address to zero. |
| 541 | * They may unregister all registered protocol families at once for |
| 542 | * a service by passing a NULL @address argument. If @netid is "" |
| 543 | * then all netids for [program, version, address] are unregistered. |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 544 | * |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 545 | * This function uses rpcbind protocol version 4 to contact the |
| 546 | * local rpcbind daemon. The local rpcbind daemon must support |
| 547 | * version 4 of the rpcbind protocol in order for these functions |
| 548 | * to register a service successfully. |
| 549 | * |
| 550 | * Supported netids include "udp" and "tcp" for UDP and TCP over |
| 551 | * IPv4, and "udp6" and "tcp6" for UDP and TCP over IPv6, |
| 552 | * respectively. |
| 553 | * |
| 554 | * The contents of @address determine the address family and the |
| 555 | * port to be registered. The usual practice is to pass INADDR_ANY |
| 556 | * as the raw address, but specifying a non-zero address is also |
| 557 | * supported by this API if the caller wishes to advertise an RPC |
| 558 | * service on a specific network interface. |
| 559 | * |
| 560 | * Note that passing in INADDR_ANY does not create the same service |
| 561 | * registration as IN6ADDR_ANY. The former advertises an RPC |
| 562 | * service on any IPv4 address, but not on IPv6. The latter |
| 563 | * advertises the service on all IPv4 and IPv6 addresses. |
| 564 | */ |
Stanislav Kinsbursky | 977ac31 | 2012-01-13 12:52:43 +0400 | [diff] [blame] | 565 | int rpcb_v4_register(struct net *net, const u32 program, const u32 version, |
Chuck Lever | 14aeb21 | 2008-08-18 19:34:00 -0400 | [diff] [blame] | 566 | const struct sockaddr *address, const char *netid) |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 567 | { |
| 568 | struct rpcbind_args map = { |
| 569 | .r_prog = program, |
| 570 | .r_vers = version, |
| 571 | .r_netid = netid, |
| 572 | .r_owner = RPCB_OWNER_STRING, |
| 573 | }; |
| 574 | struct rpc_message msg = { |
| 575 | .rpc_argp = &map, |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 576 | }; |
Stanislav Kinsbursky | 977ac31 | 2012-01-13 12:52:43 +0400 | [diff] [blame] | 577 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 578 | |
Stanislav Kinsbursky | dff02d4 | 2012-01-13 12:52:10 +0400 | [diff] [blame] | 579 | if (sn->rpcb_local_clnt4 == NULL) |
Chuck Lever | c526611 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 580 | return -EPROTONOSUPPORT; |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 581 | |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 582 | if (address == NULL) |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 583 | return rpcb_unregister_all_protofamilies(sn, &msg); |
Chuck Lever | 1673d0d | 2009-03-18 20:47:21 -0400 | [diff] [blame] | 584 | |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 585 | switch (address->sa_family) { |
| 586 | case AF_INET: |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 587 | return rpcb_register_inet4(sn, address, &msg); |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 588 | case AF_INET6: |
Stanislav Kinsbursky | 1a114a6 | 2012-01-13 12:52:26 +0400 | [diff] [blame] | 589 | return rpcb_register_inet6(sn, address, &msg); |
Chuck Lever | c2e1b09 | 2008-07-14 16:03:30 -0400 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | return -EAFNOSUPPORT; |
| 593 | } |
| 594 | |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 595 | static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc) |
Trond Myklebust | 5138fde | 2007-07-14 15:40:01 -0400 | [diff] [blame] | 596 | { |
| 597 | struct rpc_message msg = { |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 598 | .rpc_proc = proc, |
Trond Myklebust | 5138fde | 2007-07-14 15:40:01 -0400 | [diff] [blame] | 599 | .rpc_argp = map, |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 600 | .rpc_resp = map, |
Trond Myklebust | 5138fde | 2007-07-14 15:40:01 -0400 | [diff] [blame] | 601 | }; |
| 602 | struct rpc_task_setup task_setup_data = { |
| 603 | .rpc_client = rpcb_clnt, |
| 604 | .rpc_message = &msg, |
| 605 | .callback_ops = &rpcb_getport_ops, |
| 606 | .callback_data = map, |
Chuck Lever | 012da15 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 607 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFTCONN, |
Trond Myklebust | 5138fde | 2007-07-14 15:40:01 -0400 | [diff] [blame] | 608 | }; |
| 609 | |
| 610 | return rpc_run_task(&task_setup_data); |
| 611 | } |
| 612 | |
Trond Myklebust | 9a4bd29 | 2008-10-03 16:48:34 -0400 | [diff] [blame] | 613 | /* |
| 614 | * In the case where rpc clients have been cloned, we want to make |
| 615 | * sure that we use the program number/version etc of the actual |
| 616 | * owner of the xprt. To do so, we walk back up the tree of parents |
| 617 | * to find whoever created the transport and/or whoever has the |
| 618 | * autobind flag set. |
| 619 | */ |
| 620 | static struct rpc_clnt *rpcb_find_transport_owner(struct rpc_clnt *clnt) |
| 621 | { |
| 622 | struct rpc_clnt *parent = clnt->cl_parent; |
| 623 | |
| 624 | while (parent != clnt) { |
| 625 | if (parent->cl_xprt != clnt->cl_xprt) |
| 626 | break; |
| 627 | if (clnt->cl_autobind) |
| 628 | break; |
| 629 | clnt = parent; |
| 630 | parent = parent->cl_parent; |
| 631 | } |
| 632 | return clnt; |
| 633 | } |
| 634 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 635 | /** |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 636 | * rpcb_getport_async - obtain the port for a given RPC service on a given host |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 637 | * @task: task that is waiting for portmapper request |
| 638 | * |
| 639 | * This one can be called for an ongoing RPC request, and can be used in |
| 640 | * an async (rpciod) context. |
| 641 | */ |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 642 | void rpcb_getport_async(struct rpc_task *task) |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 643 | { |
Trond Myklebust | 9a4bd29 | 2008-10-03 16:48:34 -0400 | [diff] [blame] | 644 | struct rpc_clnt *clnt; |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 645 | struct rpc_procinfo *proc; |
Chuck Lever | 0a48f5d | 2007-12-10 14:56:38 -0500 | [diff] [blame] | 646 | u32 bind_version; |
Trond Myklebust | 9a4bd29 | 2008-10-03 16:48:34 -0400 | [diff] [blame] | 647 | struct rpc_xprt *xprt; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 648 | struct rpc_clnt *rpcb_clnt; |
Ben Greear | ec0dd26 | 2011-07-12 10:27:55 -0700 | [diff] [blame] | 649 | struct rpcbind_args *map; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 650 | struct rpc_task *child; |
Chuck Lever | 9f6ad26 | 2007-12-10 14:56:31 -0500 | [diff] [blame] | 651 | struct sockaddr_storage addr; |
| 652 | struct sockaddr *sap = (struct sockaddr *)&addr; |
| 653 | size_t salen; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 654 | int status; |
| 655 | |
Trond Myklebust | 9a4bd29 | 2008-10-03 16:48:34 -0400 | [diff] [blame] | 656 | clnt = rpcb_find_transport_owner(task->tk_client); |
| 657 | xprt = clnt->cl_xprt; |
| 658 | |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 659 | dprintk("RPC: %5u %s(%s, %u, %u, %d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 660 | task->tk_pid, __func__, |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 661 | clnt->cl_server, clnt->cl_prog, clnt->cl_vers, xprt->prot); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 662 | |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 663 | /* Put self on the wait queue to ensure we get notified if |
| 664 | * some other task is already attempting to bind the port */ |
| 665 | rpc_sleep_on(&xprt->binding, task, NULL); |
| 666 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 667 | if (xprt_test_and_set_binding(xprt)) { |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 668 | dprintk("RPC: %5u %s: waiting for another binder\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 669 | task->tk_pid, __func__); |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 670 | return; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 671 | } |
| 672 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 673 | /* Someone else may have bound if we slept */ |
| 674 | if (xprt_bound(xprt)) { |
| 675 | status = 0; |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 676 | dprintk("RPC: %5u %s: already bound\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 677 | task->tk_pid, __func__); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 678 | goto bailout_nofree; |
| 679 | } |
| 680 | |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 681 | /* Parent transport's destination address */ |
Chuck Lever | 9f6ad26 | 2007-12-10 14:56:31 -0500 | [diff] [blame] | 682 | salen = rpc_peeraddr(clnt, sap, sizeof(addr)); |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 683 | |
| 684 | /* Don't ever use rpcbind v2 for AF_INET6 requests */ |
Chuck Lever | 9f6ad26 | 2007-12-10 14:56:31 -0500 | [diff] [blame] | 685 | switch (sap->sa_family) { |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 686 | case AF_INET: |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 687 | proc = rpcb_next_version[xprt->bind_index].rpc_proc; |
| 688 | bind_version = rpcb_next_version[xprt->bind_index].rpc_vers; |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 689 | break; |
| 690 | case AF_INET6: |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 691 | proc = rpcb_next_version6[xprt->bind_index].rpc_proc; |
| 692 | bind_version = rpcb_next_version6[xprt->bind_index].rpc_vers; |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 693 | break; |
| 694 | default: |
| 695 | status = -EAFNOSUPPORT; |
| 696 | dprintk("RPC: %5u %s: bad address family\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 697 | task->tk_pid, __func__); |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 698 | goto bailout_nofree; |
| 699 | } |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 700 | if (proc == NULL) { |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 701 | xprt->bind_index = 0; |
Chuck Lever | 906462a | 2007-09-11 18:00:47 -0400 | [diff] [blame] | 702 | status = -EPFNOSUPPORT; |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 703 | dprintk("RPC: %5u %s: no more getport versions available\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 704 | task->tk_pid, __func__); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 705 | goto bailout_nofree; |
| 706 | } |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 707 | |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 708 | dprintk("RPC: %5u %s: trying rpcbind version %u\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 709 | task->tk_pid, __func__, bind_version); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 710 | |
Stanislav Kinsbursky | c2550e0 | 2012-01-13 12:52:35 +0400 | [diff] [blame] | 711 | rpcb_clnt = rpcb_create(xprt->xprt_net, clnt->cl_server, sap, salen, |
| 712 | xprt->prot, bind_version); |
Chuck Lever | 143b6c4 | 2007-08-16 16:03:31 -0400 | [diff] [blame] | 713 | if (IS_ERR(rpcb_clnt)) { |
| 714 | status = PTR_ERR(rpcb_clnt); |
| 715 | dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 716 | task->tk_pid, __func__, PTR_ERR(rpcb_clnt)); |
Chuck Lever | 143b6c4 | 2007-08-16 16:03:31 -0400 | [diff] [blame] | 717 | goto bailout_nofree; |
| 718 | } |
| 719 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 720 | map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC); |
| 721 | if (!map) { |
| 722 | status = -ENOMEM; |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 723 | dprintk("RPC: %5u %s: no memory available\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 724 | task->tk_pid, __func__); |
Trond Myklebust | 96165e2 | 2008-10-03 16:48:40 -0400 | [diff] [blame] | 725 | goto bailout_release_client; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 726 | } |
| 727 | map->r_prog = clnt->cl_prog; |
| 728 | map->r_vers = clnt->cl_vers; |
| 729 | map->r_prot = xprt->prot; |
| 730 | map->r_port = 0; |
| 731 | map->r_xprt = xprt_get(xprt); |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 732 | map->r_status = -EIO; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 733 | |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 734 | switch (bind_version) { |
| 735 | case RPCBVERS_4: |
| 736 | case RPCBVERS_3: |
| 737 | map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID); |
Trond Myklebust | d77385f | 2011-10-17 16:08:10 -0700 | [diff] [blame] | 738 | map->r_addr = rpc_sockaddr2uaddr(sap, GFP_ATOMIC); |
Chuck Lever | ba80913 | 2009-08-09 15:09:35 -0400 | [diff] [blame] | 739 | map->r_owner = ""; |
| 740 | break; |
| 741 | case RPCBVERS_2: |
| 742 | map->r_addr = NULL; |
| 743 | break; |
| 744 | default: |
| 745 | BUG(); |
| 746 | } |
| 747 | |
Trond Myklebust | 803a906 | 2008-07-01 15:20:55 -0400 | [diff] [blame] | 748 | child = rpcb_call_async(rpcb_clnt, map, proc); |
Trond Myklebust | 4c402b4 | 2007-06-14 16:40:32 -0400 | [diff] [blame] | 749 | rpc_release_client(rpcb_clnt); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 750 | if (IS_ERR(child)) { |
Trond Myklebust | 0d3a34b | 2008-07-07 12:18:52 -0400 | [diff] [blame] | 751 | /* rpcb_map_release() has freed the arguments */ |
Chuck Lever | 45160d6 | 2007-07-01 12:13:17 -0400 | [diff] [blame] | 752 | dprintk("RPC: %5u %s: rpc_run_task failed\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 753 | task->tk_pid, __func__); |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 754 | return; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 755 | } |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 756 | |
Trond Myklebust | 9a4bd29 | 2008-10-03 16:48:34 -0400 | [diff] [blame] | 757 | xprt->stat.bind_count++; |
| 758 | rpc_put_task(child); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 759 | return; |
| 760 | |
Trond Myklebust | 96165e2 | 2008-10-03 16:48:40 -0400 | [diff] [blame] | 761 | bailout_release_client: |
| 762 | rpc_release_client(rpcb_clnt); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 763 | bailout_nofree: |
| 764 | rpcb_wake_rpcbind_waiters(xprt, status); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 765 | task->tk_status = status; |
| 766 | } |
\"Talpey, Thomas\ | 1244480 | 2007-09-10 13:45:36 -0400 | [diff] [blame] | 767 | EXPORT_SYMBOL_GPL(rpcb_getport_async); |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 768 | |
| 769 | /* |
| 770 | * Rpcbind child task calls this callback via tk_exit. |
| 771 | */ |
| 772 | static void rpcb_getport_done(struct rpc_task *child, void *data) |
| 773 | { |
| 774 | struct rpcbind_args *map = data; |
| 775 | struct rpc_xprt *xprt = map->r_xprt; |
| 776 | int status = child->tk_status; |
| 777 | |
Chuck Lever | 4784cb5 | 2007-09-11 18:00:36 -0400 | [diff] [blame] | 778 | /* Garbage reply: retry with a lesser rpcbind version */ |
| 779 | if (status == -EIO) |
| 780 | status = -EPROTONOSUPPORT; |
| 781 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 782 | /* rpcbind server doesn't support this rpcbind protocol version */ |
| 783 | if (status == -EPROTONOSUPPORT) |
| 784 | xprt->bind_index++; |
| 785 | |
| 786 | if (status < 0) { |
| 787 | /* rpcbind server not available on remote host? */ |
| 788 | xprt->ops->set_port(xprt, 0); |
| 789 | } else if (map->r_port == 0) { |
| 790 | /* Requested RPC service wasn't registered on remote host */ |
| 791 | xprt->ops->set_port(xprt, 0); |
| 792 | status = -EACCES; |
| 793 | } else { |
| 794 | /* Succeeded */ |
| 795 | xprt->ops->set_port(xprt, map->r_port); |
| 796 | xprt_set_bound(xprt); |
| 797 | status = 0; |
| 798 | } |
| 799 | |
| 800 | dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n", |
| 801 | child->tk_pid, status, map->r_port); |
| 802 | |
Trond Myklebust | 381ba74 | 2008-07-07 12:18:53 -0400 | [diff] [blame] | 803 | map->r_status = status; |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 804 | } |
| 805 | |
Chuck Lever | 166b88d | 2008-07-14 16:03:26 -0400 | [diff] [blame] | 806 | /* |
| 807 | * XDR functions for rpcbind |
| 808 | */ |
| 809 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 810 | static void rpcb_enc_mapping(struct rpc_rqst *req, struct xdr_stream *xdr, |
| 811 | const struct rpcbind_args *rpcb) |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 812 | { |
| 813 | struct rpc_task *task = req->rq_task; |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 814 | __be32 *p; |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 815 | |
| 816 | dprintk("RPC: %5u encoding PMAP_%s call (%u, %u, %d, %u)\n", |
| 817 | task->tk_pid, task->tk_msg.rpc_proc->p_name, |
| 818 | rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port); |
| 819 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 820 | p = xdr_reserve_space(xdr, RPCB_mappingargs_sz << 2); |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 821 | *p++ = cpu_to_be32(rpcb->r_prog); |
| 822 | *p++ = cpu_to_be32(rpcb->r_vers); |
| 823 | *p++ = cpu_to_be32(rpcb->r_prot); |
| 824 | *p = cpu_to_be32(rpcb->r_port); |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 825 | } |
| 826 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 827 | static int rpcb_dec_getport(struct rpc_rqst *req, struct xdr_stream *xdr, |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 828 | struct rpcbind_args *rpcb) |
| 829 | { |
| 830 | struct rpc_task *task = req->rq_task; |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 831 | unsigned long port; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 832 | __be32 *p; |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 833 | |
| 834 | rpcb->r_port = 0; |
| 835 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 836 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 837 | if (unlikely(p == NULL)) |
| 838 | return -EIO; |
| 839 | |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 840 | port = be32_to_cpup(p); |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 841 | dprintk("RPC: %5u PMAP_%s result: %lu\n", task->tk_pid, |
| 842 | task->tk_msg.rpc_proc->p_name, port); |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 843 | if (unlikely(port > USHRT_MAX)) |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 844 | return -EIO; |
| 845 | |
| 846 | rpcb->r_port = port; |
| 847 | return 0; |
| 848 | } |
| 849 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 850 | static int rpcb_dec_set(struct rpc_rqst *req, struct xdr_stream *xdr, |
Chuck Lever | 7ed0ff9 | 2009-08-09 15:09:42 -0400 | [diff] [blame] | 851 | unsigned int *boolp) |
| 852 | { |
| 853 | struct rpc_task *task = req->rq_task; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 854 | __be32 *p; |
Chuck Lever | 7ed0ff9 | 2009-08-09 15:09:42 -0400 | [diff] [blame] | 855 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 856 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | 7ed0ff9 | 2009-08-09 15:09:42 -0400 | [diff] [blame] | 857 | if (unlikely(p == NULL)) |
| 858 | return -EIO; |
| 859 | |
| 860 | *boolp = 0; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 861 | if (*p != xdr_zero) |
Chuck Lever | 7ed0ff9 | 2009-08-09 15:09:42 -0400 | [diff] [blame] | 862 | *boolp = 1; |
| 863 | |
| 864 | dprintk("RPC: %5u RPCB_%s call %s\n", |
| 865 | task->tk_pid, task->tk_msg.rpc_proc->p_name, |
| 866 | (*boolp ? "succeeded" : "failed")); |
| 867 | return 0; |
| 868 | } |
| 869 | |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 870 | static void encode_rpcb_string(struct xdr_stream *xdr, const char *string, |
| 871 | const u32 maxstrlen) |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 872 | { |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 873 | __be32 *p; |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 874 | u32 len; |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 875 | |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 876 | len = strlen(string); |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 877 | BUG_ON(len > maxstrlen); |
| 878 | p = xdr_reserve_space(xdr, 4 + len); |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 879 | xdr_encode_opaque(p, string, len); |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 880 | } |
| 881 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 882 | static void rpcb_enc_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
| 883 | const struct rpcbind_args *rpcb) |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 884 | { |
| 885 | struct rpc_task *task = req->rq_task; |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 886 | __be32 *p; |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 887 | |
| 888 | dprintk("RPC: %5u encoding RPCB_%s call (%u, %u, '%s', '%s')\n", |
| 889 | task->tk_pid, task->tk_msg.rpc_proc->p_name, |
| 890 | rpcb->r_prog, rpcb->r_vers, |
| 891 | rpcb->r_netid, rpcb->r_addr); |
| 892 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 893 | p = xdr_reserve_space(xdr, (RPCB_program_sz + RPCB_version_sz) << 2); |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 894 | *p++ = cpu_to_be32(rpcb->r_prog); |
| 895 | *p = cpu_to_be32(rpcb->r_vers); |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 896 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 897 | encode_rpcb_string(xdr, rpcb->r_netid, RPCBIND_MAXNETIDLEN); |
| 898 | encode_rpcb_string(xdr, rpcb->r_addr, RPCBIND_MAXUADDRLEN); |
| 899 | encode_rpcb_string(xdr, rpcb->r_owner, RPCB_MAXOWNERLEN); |
Chuck Lever | 6f2c2db | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 900 | } |
| 901 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 902 | static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr, |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 903 | struct rpcbind_args *rpcb) |
| 904 | { |
| 905 | struct sockaddr_storage address; |
| 906 | struct sockaddr *sap = (struct sockaddr *)&address; |
| 907 | struct rpc_task *task = req->rq_task; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 908 | __be32 *p; |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 909 | u32 len; |
| 910 | |
| 911 | rpcb->r_port = 0; |
| 912 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 913 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 914 | if (unlikely(p == NULL)) |
| 915 | goto out_fail; |
Chuck Lever | 4129ccf | 2010-12-14 14:58:59 +0000 | [diff] [blame] | 916 | len = be32_to_cpup(p); |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 917 | |
| 918 | /* |
| 919 | * If the returned universal address is a null string, |
| 920 | * the requested RPC service was not registered. |
| 921 | */ |
| 922 | if (len == 0) { |
| 923 | dprintk("RPC: %5u RPCB reply: program not registered\n", |
| 924 | task->tk_pid); |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | if (unlikely(len > RPCBIND_MAXUADDRLEN)) |
| 929 | goto out_fail; |
| 930 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 931 | p = xdr_inline_decode(xdr, len); |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 932 | if (unlikely(p == NULL)) |
| 933 | goto out_fail; |
| 934 | dprintk("RPC: %5u RPCB_%s reply: %s\n", task->tk_pid, |
| 935 | task->tk_msg.rpc_proc->p_name, (char *)p); |
| 936 | |
Stanislav Kinsbursky | b030fb0 | 2012-01-13 14:02:40 +0400 | [diff] [blame] | 937 | if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len, |
| 938 | sap, sizeof(address)) == 0) |
Chuck Lever | c0c077d | 2009-08-09 15:09:43 -0400 | [diff] [blame] | 939 | goto out_fail; |
| 940 | rpcb->r_port = rpc_get_port(sap); |
| 941 | |
| 942 | return 0; |
| 943 | |
| 944 | out_fail: |
| 945 | dprintk("RPC: %5u malformed RPCB_%s reply\n", |
| 946 | task->tk_pid, task->tk_msg.rpc_proc->p_name); |
| 947 | return -EIO; |
| 948 | } |
| 949 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 950 | /* |
| 951 | * Not all rpcbind procedures described in RFC 1833 are implemented |
| 952 | * since the Linux kernel RPC code requires only these. |
| 953 | */ |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 954 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 955 | static struct rpc_procinfo rpcb_procedures2[] = { |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 956 | [RPCBPROC_SET] = { |
| 957 | .p_proc = RPCBPROC_SET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 958 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 959 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 960 | .p_arglen = RPCB_mappingargs_sz, |
| 961 | .p_replen = RPCB_setres_sz, |
| 962 | .p_statidx = RPCBPROC_SET, |
| 963 | .p_timer = 0, |
| 964 | .p_name = "SET", |
| 965 | }, |
| 966 | [RPCBPROC_UNSET] = { |
| 967 | .p_proc = RPCBPROC_UNSET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 968 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 969 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 970 | .p_arglen = RPCB_mappingargs_sz, |
| 971 | .p_replen = RPCB_setres_sz, |
| 972 | .p_statidx = RPCBPROC_UNSET, |
| 973 | .p_timer = 0, |
| 974 | .p_name = "UNSET", |
| 975 | }, |
| 976 | [RPCBPROC_GETPORT] = { |
| 977 | .p_proc = RPCBPROC_GETPORT, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 978 | .p_encode = (kxdreproc_t)rpcb_enc_mapping, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 979 | .p_decode = (kxdrdproc_t)rpcb_dec_getport, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 980 | .p_arglen = RPCB_mappingargs_sz, |
| 981 | .p_replen = RPCB_getportres_sz, |
| 982 | .p_statidx = RPCBPROC_GETPORT, |
| 983 | .p_timer = 0, |
| 984 | .p_name = "GETPORT", |
| 985 | }, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 986 | }; |
| 987 | |
| 988 | static struct rpc_procinfo rpcb_procedures3[] = { |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 989 | [RPCBPROC_SET] = { |
| 990 | .p_proc = RPCBPROC_SET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 991 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 992 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 993 | .p_arglen = RPCB_getaddrargs_sz, |
| 994 | .p_replen = RPCB_setres_sz, |
| 995 | .p_statidx = RPCBPROC_SET, |
| 996 | .p_timer = 0, |
| 997 | .p_name = "SET", |
| 998 | }, |
| 999 | [RPCBPROC_UNSET] = { |
| 1000 | .p_proc = RPCBPROC_UNSET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1001 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1002 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1003 | .p_arglen = RPCB_getaddrargs_sz, |
| 1004 | .p_replen = RPCB_setres_sz, |
| 1005 | .p_statidx = RPCBPROC_UNSET, |
| 1006 | .p_timer = 0, |
| 1007 | .p_name = "UNSET", |
| 1008 | }, |
| 1009 | [RPCBPROC_GETADDR] = { |
| 1010 | .p_proc = RPCBPROC_GETADDR, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1011 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1012 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1013 | .p_arglen = RPCB_getaddrargs_sz, |
| 1014 | .p_replen = RPCB_getaddrres_sz, |
| 1015 | .p_statidx = RPCBPROC_GETADDR, |
| 1016 | .p_timer = 0, |
| 1017 | .p_name = "GETADDR", |
| 1018 | }, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1019 | }; |
| 1020 | |
| 1021 | static struct rpc_procinfo rpcb_procedures4[] = { |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1022 | [RPCBPROC_SET] = { |
| 1023 | .p_proc = RPCBPROC_SET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1024 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1025 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1026 | .p_arglen = RPCB_getaddrargs_sz, |
| 1027 | .p_replen = RPCB_setres_sz, |
| 1028 | .p_statidx = RPCBPROC_SET, |
| 1029 | .p_timer = 0, |
| 1030 | .p_name = "SET", |
| 1031 | }, |
| 1032 | [RPCBPROC_UNSET] = { |
| 1033 | .p_proc = RPCBPROC_UNSET, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1034 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1035 | .p_decode = (kxdrdproc_t)rpcb_dec_set, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1036 | .p_arglen = RPCB_getaddrargs_sz, |
| 1037 | .p_replen = RPCB_setres_sz, |
| 1038 | .p_statidx = RPCBPROC_UNSET, |
| 1039 | .p_timer = 0, |
| 1040 | .p_name = "UNSET", |
| 1041 | }, |
| 1042 | [RPCBPROC_GETADDR] = { |
| 1043 | .p_proc = RPCBPROC_GETADDR, |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 1044 | .p_encode = (kxdreproc_t)rpcb_enc_getaddr, |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 1045 | .p_decode = (kxdrdproc_t)rpcb_dec_getaddr, |
Chuck Lever | f8b761e | 2009-08-09 15:09:44 -0400 | [diff] [blame] | 1046 | .p_arglen = RPCB_getaddrargs_sz, |
| 1047 | .p_replen = RPCB_getaddrres_sz, |
| 1048 | .p_statidx = RPCBPROC_GETADDR, |
| 1049 | .p_timer = 0, |
| 1050 | .p_name = "GETADDR", |
| 1051 | }, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1052 | }; |
| 1053 | |
| 1054 | static struct rpcb_info rpcb_next_version[] = { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1055 | { |
| 1056 | .rpc_vers = RPCBVERS_2, |
| 1057 | .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT], |
| 1058 | }, |
| 1059 | { |
| 1060 | .rpc_proc = NULL, |
| 1061 | }, |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1062 | }; |
| 1063 | |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 1064 | static struct rpcb_info rpcb_next_version6[] = { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1065 | { |
| 1066 | .rpc_vers = RPCBVERS_4, |
Chuck Lever | 8842413 | 2008-06-25 17:24:47 -0400 | [diff] [blame] | 1067 | .rpc_proc = &rpcb_procedures4[RPCBPROC_GETADDR], |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1068 | }, |
| 1069 | { |
| 1070 | .rpc_vers = RPCBVERS_3, |
| 1071 | .rpc_proc = &rpcb_procedures3[RPCBPROC_GETADDR], |
| 1072 | }, |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1073 | { |
| 1074 | .rpc_proc = NULL, |
| 1075 | }, |
Chuck Lever | d5b6443 | 2007-08-06 11:57:18 -0400 | [diff] [blame] | 1076 | }; |
| 1077 | |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1078 | static struct rpc_version rpcb_version2 = { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1079 | .number = RPCBVERS_2, |
Chuck Lever | 1ac7c23 | 2010-12-14 14:59:09 +0000 | [diff] [blame] | 1080 | .nrprocs = ARRAY_SIZE(rpcb_procedures2), |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1081 | .procs = rpcb_procedures2 |
| 1082 | }; |
| 1083 | |
| 1084 | static struct rpc_version rpcb_version3 = { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1085 | .number = RPCBVERS_3, |
Chuck Lever | 1ac7c23 | 2010-12-14 14:59:09 +0000 | [diff] [blame] | 1086 | .nrprocs = ARRAY_SIZE(rpcb_procedures3), |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1087 | .procs = rpcb_procedures3 |
| 1088 | }; |
| 1089 | |
| 1090 | static struct rpc_version rpcb_version4 = { |
Chuck Lever | fc200e7 | 2008-06-25 17:24:31 -0400 | [diff] [blame] | 1091 | .number = RPCBVERS_4, |
Chuck Lever | 1ac7c23 | 2010-12-14 14:59:09 +0000 | [diff] [blame] | 1092 | .nrprocs = ARRAY_SIZE(rpcb_procedures4), |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1093 | .procs = rpcb_procedures4 |
| 1094 | }; |
| 1095 | |
| 1096 | static struct rpc_version *rpcb_version[] = { |
| 1097 | NULL, |
| 1098 | NULL, |
| 1099 | &rpcb_version2, |
| 1100 | &rpcb_version3, |
| 1101 | &rpcb_version4 |
| 1102 | }; |
| 1103 | |
| 1104 | static struct rpc_stat rpcb_stats; |
| 1105 | |
Adrian Bunk | 7f4adef | 2007-06-13 01:03:13 +0200 | [diff] [blame] | 1106 | static struct rpc_program rpcb_program = { |
Chuck Lever | a509050 | 2007-03-29 16:48:04 -0400 | [diff] [blame] | 1107 | .name = "rpcbind", |
| 1108 | .number = RPCBIND_PROGRAM, |
| 1109 | .nrvers = ARRAY_SIZE(rpcb_version), |
| 1110 | .version = rpcb_version, |
| 1111 | .stats = &rpcb_stats, |
| 1112 | }; |