Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
55aa4f58 | 2 | * linux/net/sunrpc/clnt.c |
1da177e4 LT |
3 | * |
4 | * This file contains the high-level RPC interface. | |
5 | * It is modeled as a finite state machine to support both synchronous | |
6 | * and asynchronous requests. | |
7 | * | |
8 | * - RPC header generation and argument serialization. | |
9 | * - Credential refresh. | |
10 | * - TCP connect handling. | |
11 | * - Retry of operation when it is suspected the operation failed because | |
12 | * of uid squashing on the server, or when the credentials were stale | |
13 | * and need to be refreshed, or when a packet was damaged in transit. | |
14 | * This may be have to be moved to the VFS layer. | |
15 | * | |
1da177e4 LT |
16 | * Copyright (C) 1992,1993 Rick Sladkey <jrs@world.std.com> |
17 | * Copyright (C) 1995,1996 Olaf Kirch <okir@monad.swb.de> | |
18 | */ | |
19 | ||
20 | #include <asm/system.h> | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/types.h> | |
cb3997b5 | 24 | #include <linux/kallsyms.h> |
1da177e4 | 25 | #include <linux/mm.h> |
23ac6581 TM |
26 | #include <linux/namei.h> |
27 | #include <linux/mount.h> | |
1da177e4 | 28 | #include <linux/slab.h> |
1da177e4 | 29 | #include <linux/utsname.h> |
11c556b3 | 30 | #include <linux/workqueue.h> |
176e21ee | 31 | #include <linux/in.h> |
510deb0d | 32 | #include <linux/in6.h> |
176e21ee | 33 | #include <linux/un.h> |
1da177e4 LT |
34 | |
35 | #include <linux/sunrpc/clnt.h> | |
1da177e4 | 36 | #include <linux/sunrpc/rpc_pipe_fs.h> |
11c556b3 | 37 | #include <linux/sunrpc/metrics.h> |
55ae1aab | 38 | #include <linux/sunrpc/bc_xprt.h> |
1da177e4 | 39 | |
55ae1aab | 40 | #include "sunrpc.h" |
70abc49b | 41 | #include "netns.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #ifdef RPC_DEBUG |
44 | # define RPCDBG_FACILITY RPCDBG_CALL | |
45 | #endif | |
46 | ||
46121cf7 CL |
47 | #define dprint_status(t) \ |
48 | dprintk("RPC: %5u %s (status %d)\n", t->tk_pid, \ | |
0dc47877 | 49 | __func__, t->tk_status) |
46121cf7 | 50 | |
188fef11 TM |
51 | /* |
52 | * All RPC clients are linked into this list | |
53 | */ | |
188fef11 | 54 | |
1da177e4 LT |
55 | static DECLARE_WAIT_QUEUE_HEAD(destroy_wait); |
56 | ||
57 | ||
58 | static void call_start(struct rpc_task *task); | |
59 | static void call_reserve(struct rpc_task *task); | |
60 | static void call_reserveresult(struct rpc_task *task); | |
61 | static void call_allocate(struct rpc_task *task); | |
1da177e4 LT |
62 | static void call_decode(struct rpc_task *task); |
63 | static void call_bind(struct rpc_task *task); | |
da351878 | 64 | static void call_bind_status(struct rpc_task *task); |
1da177e4 | 65 | static void call_transmit(struct rpc_task *task); |
9e00abc3 | 66 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
55ae1aab | 67 | static void call_bc_transmit(struct rpc_task *task); |
9e00abc3 | 68 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
1da177e4 | 69 | static void call_status(struct rpc_task *task); |
940e3318 | 70 | static void call_transmit_status(struct rpc_task *task); |
1da177e4 LT |
71 | static void call_refresh(struct rpc_task *task); |
72 | static void call_refreshresult(struct rpc_task *task); | |
73 | static void call_timeout(struct rpc_task *task); | |
74 | static void call_connect(struct rpc_task *task); | |
75 | static void call_connect_status(struct rpc_task *task); | |
1da177e4 | 76 | |
b0e1c57e CL |
77 | static __be32 *rpc_encode_header(struct rpc_task *task); |
78 | static __be32 *rpc_verify_header(struct rpc_task *task); | |
caabea8a | 79 | static int rpc_ping(struct rpc_clnt *clnt); |
64c91a1f | 80 | |
188fef11 TM |
81 | static void rpc_register_client(struct rpc_clnt *clnt) |
82 | { | |
70abc49b SK |
83 | struct sunrpc_net *sn = net_generic(clnt->cl_xprt->xprt_net, sunrpc_net_id); |
84 | ||
85 | spin_lock(&sn->rpc_client_lock); | |
86 | list_add(&clnt->cl_clients, &sn->all_clients); | |
87 | spin_unlock(&sn->rpc_client_lock); | |
188fef11 TM |
88 | } |
89 | ||
90 | static void rpc_unregister_client(struct rpc_clnt *clnt) | |
91 | { | |
70abc49b SK |
92 | struct sunrpc_net *sn = net_generic(clnt->cl_xprt->xprt_net, sunrpc_net_id); |
93 | ||
94 | spin_lock(&sn->rpc_client_lock); | |
188fef11 | 95 | list_del(&clnt->cl_clients); |
70abc49b | 96 | spin_unlock(&sn->rpc_client_lock); |
188fef11 | 97 | } |
1da177e4 | 98 | |
0157d021 SK |
99 | static void __rpc_clnt_remove_pipedir(struct rpc_clnt *clnt) |
100 | { | |
80df9d20 SK |
101 | if (clnt->cl_path.dentry) { |
102 | if (clnt->cl_auth && clnt->cl_auth->au_ops->pipes_destroy) | |
103 | clnt->cl_auth->au_ops->pipes_destroy(clnt->cl_auth); | |
0157d021 | 104 | rpc_remove_client_dir(clnt->cl_path.dentry); |
80df9d20 | 105 | } |
0157d021 SK |
106 | clnt->cl_path.dentry = NULL; |
107 | } | |
108 | ||
109 | static void rpc_clnt_remove_pipedir(struct rpc_clnt *clnt) | |
110 | { | |
111 | struct super_block *pipefs_sb; | |
112 | int put_mnt = 0; | |
113 | ||
114 | pipefs_sb = rpc_get_sb_net(clnt->cl_xprt->xprt_net); | |
115 | if (pipefs_sb) { | |
116 | if (clnt->cl_path.dentry) | |
117 | put_mnt = 1; | |
118 | __rpc_clnt_remove_pipedir(clnt); | |
119 | rpc_put_sb_net(clnt->cl_xprt->xprt_net); | |
120 | } | |
121 | if (put_mnt) | |
122 | rpc_put_mount(); | |
123 | } | |
124 | ||
125 | static struct dentry *rpc_setup_pipedir_sb(struct super_block *sb, | |
126 | struct rpc_clnt *clnt, char *dir_name) | |
1da177e4 | 127 | { |
f134585a | 128 | static uint32_t clntid; |
23ac6581 TM |
129 | char name[15]; |
130 | struct qstr q = { | |
131 | .name = name, | |
132 | }; | |
0157d021 | 133 | struct dentry *dir, *dentry; |
1da177e4 LT |
134 | int error; |
135 | ||
0157d021 SK |
136 | dir = rpc_d_lookup_sb(sb, dir_name); |
137 | if (dir == NULL) | |
138 | return dir; | |
f134585a | 139 | for (;;) { |
23ac6581 TM |
140 | q.len = snprintf(name, sizeof(name), "clnt%x", (unsigned int)clntid++); |
141 | name[sizeof(name) - 1] = '\0'; | |
142 | q.hash = full_name_hash(q.name, q.len); | |
0157d021 SK |
143 | dentry = rpc_create_client_dir(dir, &q, clnt); |
144 | if (!IS_ERR(dentry)) | |
23ac6581 | 145 | break; |
0157d021 | 146 | error = PTR_ERR(dentry); |
f134585a | 147 | if (error != -EEXIST) { |
23ac6581 TM |
148 | printk(KERN_INFO "RPC: Couldn't create pipefs entry" |
149 | " %s/%s, error %d\n", | |
150 | dir_name, name, error); | |
0157d021 | 151 | break; |
f134585a | 152 | } |
1da177e4 | 153 | } |
0157d021 SK |
154 | dput(dir); |
155 | return dentry; | |
156 | } | |
157 | ||
158 | static int | |
159 | rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name) | |
160 | { | |
161 | struct super_block *pipefs_sb; | |
162 | struct path path; | |
163 | ||
164 | clnt->cl_path.mnt = ERR_PTR(-ENOENT); | |
165 | clnt->cl_path.dentry = NULL; | |
166 | if (dir_name == NULL) | |
167 | return 0; | |
168 | ||
169 | path.mnt = rpc_get_mount(); | |
170 | if (IS_ERR(path.mnt)) | |
171 | return PTR_ERR(path.mnt); | |
172 | pipefs_sb = rpc_get_sb_net(clnt->cl_xprt->xprt_net); | |
173 | if (!pipefs_sb) { | |
174 | rpc_put_mount(); | |
175 | return -ENOENT; | |
176 | } | |
177 | path.dentry = rpc_setup_pipedir_sb(pipefs_sb, clnt, dir_name); | |
178 | rpc_put_sb_net(clnt->cl_xprt->xprt_net); | |
179 | if (IS_ERR(path.dentry)) { | |
180 | rpc_put_mount(); | |
181 | return PTR_ERR(path.dentry); | |
182 | } | |
23ac6581 TM |
183 | clnt->cl_path = path; |
184 | return 0; | |
1da177e4 LT |
185 | } |
186 | ||
80df9d20 SK |
187 | static int __rpc_pipefs_event(struct rpc_clnt *clnt, unsigned long event, |
188 | struct super_block *sb) | |
189 | { | |
190 | struct dentry *dentry; | |
191 | int err = 0; | |
192 | ||
193 | switch (event) { | |
194 | case RPC_PIPEFS_MOUNT: | |
195 | if (clnt->cl_program->pipe_dir_name == NULL) | |
196 | break; | |
197 | dentry = rpc_setup_pipedir_sb(sb, clnt, | |
198 | clnt->cl_program->pipe_dir_name); | |
199 | BUG_ON(dentry == NULL); | |
200 | if (IS_ERR(dentry)) | |
201 | return PTR_ERR(dentry); | |
202 | clnt->cl_path.dentry = dentry; | |
203 | if (clnt->cl_auth->au_ops->pipes_create) { | |
204 | err = clnt->cl_auth->au_ops->pipes_create(clnt->cl_auth); | |
205 | if (err) | |
206 | __rpc_clnt_remove_pipedir(clnt); | |
207 | } | |
208 | break; | |
209 | case RPC_PIPEFS_UMOUNT: | |
210 | __rpc_clnt_remove_pipedir(clnt); | |
211 | break; | |
212 | default: | |
213 | printk(KERN_ERR "%s: unknown event: %ld\n", __func__, event); | |
214 | return -ENOTSUPP; | |
215 | } | |
216 | return err; | |
217 | } | |
218 | ||
219 | static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, | |
220 | void *ptr) | |
221 | { | |
222 | struct super_block *sb = ptr; | |
223 | struct rpc_clnt *clnt; | |
224 | int error = 0; | |
225 | struct sunrpc_net *sn = net_generic(sb->s_fs_info, sunrpc_net_id); | |
226 | ||
227 | spin_lock(&sn->rpc_client_lock); | |
228 | list_for_each_entry(clnt, &sn->all_clients, cl_clients) { | |
229 | error = __rpc_pipefs_event(clnt, event, sb); | |
230 | if (error) | |
231 | break; | |
232 | } | |
233 | spin_unlock(&sn->rpc_client_lock); | |
234 | return error; | |
235 | } | |
236 | ||
237 | static struct notifier_block rpc_clients_block = { | |
238 | .notifier_call = rpc_pipefs_event, | |
239 | }; | |
240 | ||
241 | int rpc_clients_notifier_register(void) | |
242 | { | |
243 | return rpc_pipefs_notifier_register(&rpc_clients_block); | |
244 | } | |
245 | ||
246 | void rpc_clients_notifier_unregister(void) | |
247 | { | |
248 | return rpc_pipefs_notifier_unregister(&rpc_clients_block); | |
249 | } | |
250 | ||
698b6d08 | 251 | static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt) |
1da177e4 | 252 | { |
698b6d08 | 253 | struct rpc_program *program = args->program; |
1da177e4 LT |
254 | struct rpc_version *version; |
255 | struct rpc_clnt *clnt = NULL; | |
6a19275a | 256 | struct rpc_auth *auth; |
1da177e4 | 257 | int err; |
06b8d255 CL |
258 | size_t len; |
259 | ||
260 | /* sanity check the name before trying to print it */ | |
261 | err = -EINVAL; | |
698b6d08 | 262 | len = strlen(args->servername); |
06b8d255 CL |
263 | if (len > RPC_MAXNETNAMELEN) |
264 | goto out_no_rpciod; | |
265 | len++; | |
1da177e4 | 266 | |
46121cf7 | 267 | dprintk("RPC: creating %s client for %s (xprt %p)\n", |
698b6d08 | 268 | program->name, args->servername, xprt); |
1da177e4 | 269 | |
4ada539e TM |
270 | err = rpciod_up(); |
271 | if (err) | |
272 | goto out_no_rpciod; | |
1da177e4 LT |
273 | err = -EINVAL; |
274 | if (!xprt) | |
712917d1 | 275 | goto out_no_xprt; |
698b6d08 TM |
276 | |
277 | if (args->version >= program->nrvers) | |
278 | goto out_err; | |
279 | version = program->version[args->version]; | |
280 | if (version == NULL) | |
1da177e4 LT |
281 | goto out_err; |
282 | ||
283 | err = -ENOMEM; | |
0da974f4 | 284 | clnt = kzalloc(sizeof(*clnt), GFP_KERNEL); |
1da177e4 LT |
285 | if (!clnt) |
286 | goto out_err; | |
1da177e4 LT |
287 | clnt->cl_parent = clnt; |
288 | ||
289 | clnt->cl_server = clnt->cl_inline_name; | |
1da177e4 LT |
290 | if (len > sizeof(clnt->cl_inline_name)) { |
291 | char *buf = kmalloc(len, GFP_KERNEL); | |
698b6d08 | 292 | if (buf != NULL) |
1da177e4 LT |
293 | clnt->cl_server = buf; |
294 | else | |
295 | len = sizeof(clnt->cl_inline_name); | |
296 | } | |
698b6d08 | 297 | strlcpy(clnt->cl_server, args->servername, len); |
1da177e4 LT |
298 | |
299 | clnt->cl_xprt = xprt; | |
300 | clnt->cl_procinfo = version->procs; | |
301 | clnt->cl_maxproc = version->nrprocs; | |
302 | clnt->cl_protname = program->name; | |
d5b337b4 | 303 | clnt->cl_prog = args->prognumber ? : program->number; |
1da177e4 | 304 | clnt->cl_vers = version->number; |
1da177e4 | 305 | clnt->cl_stats = program->stats; |
11c556b3 | 306 | clnt->cl_metrics = rpc_alloc_iostats(clnt); |
23bf85ba TM |
307 | err = -ENOMEM; |
308 | if (clnt->cl_metrics == NULL) | |
309 | goto out_no_stats; | |
3e32a5d9 | 310 | clnt->cl_program = program; |
6529eba0 | 311 | INIT_LIST_HEAD(&clnt->cl_tasks); |
4bef61ff | 312 | spin_lock_init(&clnt->cl_lock); |
1da177e4 | 313 | |
ec739ef0 | 314 | if (!xprt_bound(clnt->cl_xprt)) |
1da177e4 LT |
315 | clnt->cl_autobind = 1; |
316 | ||
ba7392bb TM |
317 | clnt->cl_timeout = xprt->timeout; |
318 | if (args->timeout != NULL) { | |
319 | memcpy(&clnt->cl_timeout_default, args->timeout, | |
320 | sizeof(clnt->cl_timeout_default)); | |
321 | clnt->cl_timeout = &clnt->cl_timeout_default; | |
322 | } | |
323 | ||
1da177e4 | 324 | clnt->cl_rtt = &clnt->cl_rtt_default; |
ba7392bb | 325 | rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); |
608207e8 OK |
326 | clnt->cl_principal = NULL; |
327 | if (args->client_name) { | |
328 | clnt->cl_principal = kstrdup(args->client_name, GFP_KERNEL); | |
329 | if (!clnt->cl_principal) | |
330 | goto out_no_principal; | |
331 | } | |
1da177e4 | 332 | |
006abe88 | 333 | atomic_set(&clnt->cl_count, 1); |
34f52e35 | 334 | |
1da177e4 LT |
335 | err = rpc_setup_pipedir(clnt, program->pipe_dir_name); |
336 | if (err < 0) | |
337 | goto out_no_path; | |
338 | ||
698b6d08 | 339 | auth = rpcauth_create(args->authflavor, clnt); |
6a19275a | 340 | if (IS_ERR(auth)) { |
1da177e4 | 341 | printk(KERN_INFO "RPC: Couldn't create auth handle (flavor %u)\n", |
698b6d08 | 342 | args->authflavor); |
6a19275a | 343 | err = PTR_ERR(auth); |
1da177e4 LT |
344 | goto out_no_auth; |
345 | } | |
346 | ||
347 | /* save the nodename */ | |
63ffc23d | 348 | clnt->cl_nodelen = strlen(init_utsname()->nodename); |
1da177e4 LT |
349 | if (clnt->cl_nodelen > UNX_MAXNODENAME) |
350 | clnt->cl_nodelen = UNX_MAXNODENAME; | |
63ffc23d | 351 | memcpy(clnt->cl_nodename, init_utsname()->nodename, clnt->cl_nodelen); |
6529eba0 | 352 | rpc_register_client(clnt); |
1da177e4 LT |
353 | return clnt; |
354 | ||
355 | out_no_auth: | |
0157d021 | 356 | rpc_clnt_remove_pipedir(clnt); |
1da177e4 | 357 | out_no_path: |
608207e8 OK |
358 | kfree(clnt->cl_principal); |
359 | out_no_principal: | |
23bf85ba TM |
360 | rpc_free_iostats(clnt->cl_metrics); |
361 | out_no_stats: | |
1da177e4 LT |
362 | if (clnt->cl_server != clnt->cl_inline_name) |
363 | kfree(clnt->cl_server); | |
364 | kfree(clnt); | |
365 | out_err: | |
6b6ca86b | 366 | xprt_put(xprt); |
712917d1 | 367 | out_no_xprt: |
4ada539e TM |
368 | rpciod_down(); |
369 | out_no_rpciod: | |
1da177e4 LT |
370 | return ERR_PTR(err); |
371 | } | |
372 | ||
c2866763 CL |
373 | /* |
374 | * rpc_create - create an RPC client and transport with one call | |
375 | * @args: rpc_clnt create argument structure | |
376 | * | |
377 | * Creates and initializes an RPC transport and an RPC client. | |
378 | * | |
379 | * It can ping the server in order to determine if it is up, and to see if | |
380 | * it supports this program and version. RPC_CLNT_CREATE_NOPING disables | |
381 | * this behavior so asynchronous tasks can also use rpc_create. | |
382 | */ | |
383 | struct rpc_clnt *rpc_create(struct rpc_create_args *args) | |
384 | { | |
385 | struct rpc_xprt *xprt; | |
386 | struct rpc_clnt *clnt; | |
3c341b0b | 387 | struct xprt_create xprtargs = { |
9a23e332 | 388 | .net = args->net, |
4fa016eb | 389 | .ident = args->protocol, |
d3bc9a1d | 390 | .srcaddr = args->saddress, |
96802a09 FM |
391 | .dstaddr = args->address, |
392 | .addrlen = args->addrsize, | |
f300baba | 393 | .bc_xprt = args->bc_xprt, |
96802a09 | 394 | }; |
510deb0d | 395 | char servername[48]; |
c2866763 | 396 | |
43780b87 CL |
397 | /* |
398 | * If the caller chooses not to specify a hostname, whip | |
399 | * up a string representation of the passed-in address. | |
400 | */ | |
401 | if (args->servername == NULL) { | |
176e21ee CL |
402 | struct sockaddr_un *sun = |
403 | (struct sockaddr_un *)args->address; | |
da09eb93 CL |
404 | struct sockaddr_in *sin = |
405 | (struct sockaddr_in *)args->address; | |
406 | struct sockaddr_in6 *sin6 = | |
407 | (struct sockaddr_in6 *)args->address; | |
408 | ||
510deb0d CL |
409 | servername[0] = '\0'; |
410 | switch (args->address->sa_family) { | |
176e21ee CL |
411 | case AF_LOCAL: |
412 | snprintf(servername, sizeof(servername), "%s", | |
413 | sun->sun_path); | |
414 | break; | |
da09eb93 | 415 | case AF_INET: |
21454aaa HH |
416 | snprintf(servername, sizeof(servername), "%pI4", |
417 | &sin->sin_addr.s_addr); | |
510deb0d | 418 | break; |
da09eb93 | 419 | case AF_INET6: |
5b095d98 | 420 | snprintf(servername, sizeof(servername), "%pI6", |
da09eb93 | 421 | &sin6->sin6_addr); |
510deb0d | 422 | break; |
510deb0d CL |
423 | default: |
424 | /* caller wants default server name, but | |
425 | * address family isn't recognized. */ | |
426 | return ERR_PTR(-EINVAL); | |
427 | } | |
43780b87 CL |
428 | args->servername = servername; |
429 | } | |
430 | ||
510deb0d CL |
431 | xprt = xprt_create_transport(&xprtargs); |
432 | if (IS_ERR(xprt)) | |
433 | return (struct rpc_clnt *)xprt; | |
434 | ||
c2866763 CL |
435 | /* |
436 | * By default, kernel RPC client connects from a reserved port. | |
437 | * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters, | |
438 | * but it is always enabled for rpciod, which handles the connect | |
439 | * operation. | |
440 | */ | |
441 | xprt->resvport = 1; | |
442 | if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) | |
443 | xprt->resvport = 0; | |
444 | ||
698b6d08 | 445 | clnt = rpc_new_client(args, xprt); |
c2866763 CL |
446 | if (IS_ERR(clnt)) |
447 | return clnt; | |
448 | ||
449 | if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { | |
caabea8a | 450 | int err = rpc_ping(clnt); |
c2866763 CL |
451 | if (err != 0) { |
452 | rpc_shutdown_client(clnt); | |
453 | return ERR_PTR(err); | |
454 | } | |
455 | } | |
456 | ||
457 | clnt->cl_softrtry = 1; | |
458 | if (args->flags & RPC_CLNT_CREATE_HARDRTRY) | |
459 | clnt->cl_softrtry = 0; | |
460 | ||
c2866763 CL |
461 | if (args->flags & RPC_CLNT_CREATE_AUTOBIND) |
462 | clnt->cl_autobind = 1; | |
43d78ef2 CL |
463 | if (args->flags & RPC_CLNT_CREATE_DISCRTRY) |
464 | clnt->cl_discrtry = 1; | |
b6b6152c OK |
465 | if (!(args->flags & RPC_CLNT_CREATE_QUIET)) |
466 | clnt->cl_chatty = 1; | |
c2866763 CL |
467 | |
468 | return clnt; | |
469 | } | |
b86acd50 | 470 | EXPORT_SYMBOL_GPL(rpc_create); |
c2866763 | 471 | |
1da177e4 LT |
472 | /* |
473 | * This function clones the RPC client structure. It allows us to share the | |
474 | * same transport while varying parameters such as the authentication | |
475 | * flavour. | |
476 | */ | |
477 | struct rpc_clnt * | |
478 | rpc_clone_client(struct rpc_clnt *clnt) | |
479 | { | |
480 | struct rpc_clnt *new; | |
3e32a5d9 | 481 | int err = -ENOMEM; |
1da177e4 | 482 | |
e69062b4 | 483 | new = kmemdup(clnt, sizeof(*new), GFP_KERNEL); |
1da177e4 LT |
484 | if (!new) |
485 | goto out_no_clnt; | |
d431a555 TM |
486 | new->cl_parent = clnt; |
487 | /* Turn off autobind on clones */ | |
488 | new->cl_autobind = 0; | |
489 | INIT_LIST_HEAD(&new->cl_tasks); | |
490 | spin_lock_init(&new->cl_lock); | |
ba7392bb | 491 | rpc_init_rtt(&new->cl_rtt_default, clnt->cl_timeout->to_initval); |
23bf85ba TM |
492 | new->cl_metrics = rpc_alloc_iostats(clnt); |
493 | if (new->cl_metrics == NULL) | |
494 | goto out_no_stats; | |
608207e8 OK |
495 | if (clnt->cl_principal) { |
496 | new->cl_principal = kstrdup(clnt->cl_principal, GFP_KERNEL); | |
497 | if (new->cl_principal == NULL) | |
498 | goto out_no_principal; | |
499 | } | |
006abe88 | 500 | atomic_set(&new->cl_count, 1); |
3e32a5d9 TM |
501 | err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name); |
502 | if (err != 0) | |
503 | goto out_no_path; | |
1da177e4 LT |
504 | if (new->cl_auth) |
505 | atomic_inc(&new->cl_auth->au_count); | |
d431a555 | 506 | xprt_get(clnt->cl_xprt); |
006abe88 | 507 | atomic_inc(&clnt->cl_count); |
6529eba0 | 508 | rpc_register_client(new); |
4ada539e | 509 | rpciod_up(); |
1da177e4 | 510 | return new; |
3e32a5d9 | 511 | out_no_path: |
608207e8 OK |
512 | kfree(new->cl_principal); |
513 | out_no_principal: | |
3e32a5d9 | 514 | rpc_free_iostats(new->cl_metrics); |
23bf85ba TM |
515 | out_no_stats: |
516 | kfree(new); | |
1da177e4 | 517 | out_no_clnt: |
0dc47877 | 518 | dprintk("RPC: %s: returned error %d\n", __func__, err); |
3e32a5d9 | 519 | return ERR_PTR(err); |
1da177e4 | 520 | } |
e8914c65 | 521 | EXPORT_SYMBOL_GPL(rpc_clone_client); |
1da177e4 | 522 | |
58f9612c TM |
523 | /* |
524 | * Kill all tasks for the given client. | |
525 | * XXX: kill their descendants as well? | |
526 | */ | |
527 | void rpc_killall_tasks(struct rpc_clnt *clnt) | |
528 | { | |
529 | struct rpc_task *rovr; | |
530 | ||
531 | ||
532 | if (list_empty(&clnt->cl_tasks)) | |
533 | return; | |
534 | dprintk("RPC: killing all tasks for client %p\n", clnt); | |
535 | /* | |
536 | * Spin lock all_tasks to prevent changes... | |
537 | */ | |
538 | spin_lock(&clnt->cl_lock); | |
539 | list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) { | |
540 | if (!RPC_IS_ACTIVATED(rovr)) | |
541 | continue; | |
542 | if (!(rovr->tk_flags & RPC_TASK_KILLED)) { | |
543 | rovr->tk_flags |= RPC_TASK_KILLED; | |
544 | rpc_exit(rovr, -EIO); | |
8e26de23 SK |
545 | if (RPC_IS_QUEUED(rovr)) |
546 | rpc_wake_up_queued_task(rovr->tk_waitqueue, | |
547 | rovr); | |
58f9612c TM |
548 | } |
549 | } | |
550 | spin_unlock(&clnt->cl_lock); | |
551 | } | |
552 | EXPORT_SYMBOL_GPL(rpc_killall_tasks); | |
553 | ||
1da177e4 LT |
554 | /* |
555 | * Properly shut down an RPC client, terminating all outstanding | |
90c5755f | 556 | * requests. |
1da177e4 | 557 | */ |
4c402b40 | 558 | void rpc_shutdown_client(struct rpc_clnt *clnt) |
1da177e4 | 559 | { |
34f52e35 TM |
560 | dprintk("RPC: shutting down %s client for %s\n", |
561 | clnt->cl_protname, clnt->cl_server); | |
1da177e4 | 562 | |
34f52e35 | 563 | while (!list_empty(&clnt->cl_tasks)) { |
1da177e4 | 564 | rpc_killall_tasks(clnt); |
532347e2 | 565 | wait_event_timeout(destroy_wait, |
34f52e35 | 566 | list_empty(&clnt->cl_tasks), 1*HZ); |
1da177e4 LT |
567 | } |
568 | ||
4c402b40 | 569 | rpc_release_client(clnt); |
1da177e4 | 570 | } |
e8914c65 | 571 | EXPORT_SYMBOL_GPL(rpc_shutdown_client); |
1da177e4 LT |
572 | |
573 | /* | |
34f52e35 | 574 | * Free an RPC client |
1da177e4 | 575 | */ |
34f52e35 | 576 | static void |
006abe88 | 577 | rpc_free_client(struct rpc_clnt *clnt) |
1da177e4 | 578 | { |
46121cf7 | 579 | dprintk("RPC: destroying %s client for %s\n", |
1da177e4 | 580 | clnt->cl_protname, clnt->cl_server); |
0157d021 | 581 | rpc_clnt_remove_pipedir(clnt); |
3e32a5d9 | 582 | if (clnt->cl_parent != clnt) { |
8ad7c892 | 583 | rpc_release_client(clnt->cl_parent); |
3e32a5d9 TM |
584 | goto out_free; |
585 | } | |
1da177e4 LT |
586 | if (clnt->cl_server != clnt->cl_inline_name) |
587 | kfree(clnt->cl_server); | |
588 | out_free: | |
6529eba0 | 589 | rpc_unregister_client(clnt); |
11c556b3 | 590 | rpc_free_iostats(clnt->cl_metrics); |
608207e8 | 591 | kfree(clnt->cl_principal); |
11c556b3 | 592 | clnt->cl_metrics = NULL; |
6b6ca86b | 593 | xprt_put(clnt->cl_xprt); |
4ada539e | 594 | rpciod_down(); |
1da177e4 | 595 | kfree(clnt); |
1da177e4 LT |
596 | } |
597 | ||
1dd17ec6 TM |
598 | /* |
599 | * Free an RPC client | |
600 | */ | |
601 | static void | |
006abe88 | 602 | rpc_free_auth(struct rpc_clnt *clnt) |
1dd17ec6 | 603 | { |
1dd17ec6 | 604 | if (clnt->cl_auth == NULL) { |
006abe88 | 605 | rpc_free_client(clnt); |
1dd17ec6 TM |
606 | return; |
607 | } | |
608 | ||
609 | /* | |
610 | * Note: RPCSEC_GSS may need to send NULL RPC calls in order to | |
611 | * release remaining GSS contexts. This mechanism ensures | |
612 | * that it can do so safely. | |
613 | */ | |
006abe88 | 614 | atomic_inc(&clnt->cl_count); |
1dd17ec6 TM |
615 | rpcauth_release(clnt->cl_auth); |
616 | clnt->cl_auth = NULL; | |
006abe88 TM |
617 | if (atomic_dec_and_test(&clnt->cl_count)) |
618 | rpc_free_client(clnt); | |
1dd17ec6 TM |
619 | } |
620 | ||
1da177e4 | 621 | /* |
34f52e35 | 622 | * Release reference to the RPC client |
1da177e4 LT |
623 | */ |
624 | void | |
625 | rpc_release_client(struct rpc_clnt *clnt) | |
626 | { | |
34f52e35 | 627 | dprintk("RPC: rpc_release_client(%p)\n", clnt); |
1da177e4 | 628 | |
34f52e35 TM |
629 | if (list_empty(&clnt->cl_tasks)) |
630 | wake_up(&destroy_wait); | |
006abe88 TM |
631 | if (atomic_dec_and_test(&clnt->cl_count)) |
632 | rpc_free_auth(clnt); | |
34f52e35 TM |
633 | } |
634 | ||
007e251f AG |
635 | /** |
636 | * rpc_bind_new_program - bind a new RPC program to an existing client | |
65b6e42c RD |
637 | * @old: old rpc_client |
638 | * @program: rpc program to set | |
639 | * @vers: rpc program version | |
007e251f AG |
640 | * |
641 | * Clones the rpc client and sets up a new RPC program. This is mainly | |
642 | * of use for enabling different RPC programs to share the same transport. | |
643 | * The Sun NFSv2/v3 ACL protocol can do this. | |
644 | */ | |
645 | struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old, | |
646 | struct rpc_program *program, | |
89eb21c3 | 647 | u32 vers) |
007e251f AG |
648 | { |
649 | struct rpc_clnt *clnt; | |
650 | struct rpc_version *version; | |
651 | int err; | |
652 | ||
653 | BUG_ON(vers >= program->nrvers || !program->version[vers]); | |
654 | version = program->version[vers]; | |
655 | clnt = rpc_clone_client(old); | |
656 | if (IS_ERR(clnt)) | |
657 | goto out; | |
658 | clnt->cl_procinfo = version->procs; | |
659 | clnt->cl_maxproc = version->nrprocs; | |
660 | clnt->cl_protname = program->name; | |
661 | clnt->cl_prog = program->number; | |
662 | clnt->cl_vers = version->number; | |
663 | clnt->cl_stats = program->stats; | |
caabea8a | 664 | err = rpc_ping(clnt); |
007e251f AG |
665 | if (err != 0) { |
666 | rpc_shutdown_client(clnt); | |
667 | clnt = ERR_PTR(err); | |
668 | } | |
cca5172a | 669 | out: |
007e251f AG |
670 | return clnt; |
671 | } | |
e8914c65 | 672 | EXPORT_SYMBOL_GPL(rpc_bind_new_program); |
007e251f | 673 | |
58f9612c TM |
674 | void rpc_task_release_client(struct rpc_task *task) |
675 | { | |
676 | struct rpc_clnt *clnt = task->tk_client; | |
677 | ||
678 | if (clnt != NULL) { | |
679 | /* Remove from client task list */ | |
680 | spin_lock(&clnt->cl_lock); | |
681 | list_del(&task->tk_task); | |
682 | spin_unlock(&clnt->cl_lock); | |
683 | task->tk_client = NULL; | |
684 | ||
685 | rpc_release_client(clnt); | |
686 | } | |
687 | } | |
688 | ||
689 | static | |
690 | void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt) | |
691 | { | |
692 | if (clnt != NULL) { | |
693 | rpc_task_release_client(task); | |
694 | task->tk_client = clnt; | |
006abe88 | 695 | atomic_inc(&clnt->cl_count); |
58f9612c TM |
696 | if (clnt->cl_softrtry) |
697 | task->tk_flags |= RPC_TASK_SOFT; | |
698 | /* Add to the client's list of all tasks */ | |
699 | spin_lock(&clnt->cl_lock); | |
700 | list_add_tail(&task->tk_task, &clnt->cl_tasks); | |
701 | spin_unlock(&clnt->cl_lock); | |
702 | } | |
703 | } | |
704 | ||
cbdabc7f AA |
705 | void rpc_task_reset_client(struct rpc_task *task, struct rpc_clnt *clnt) |
706 | { | |
707 | rpc_task_release_client(task); | |
708 | rpc_task_set_client(task, clnt); | |
709 | } | |
710 | EXPORT_SYMBOL_GPL(rpc_task_reset_client); | |
711 | ||
712 | ||
58f9612c TM |
713 | static void |
714 | rpc_task_set_rpc_message(struct rpc_task *task, const struct rpc_message *msg) | |
715 | { | |
716 | if (msg != NULL) { | |
717 | task->tk_msg.rpc_proc = msg->rpc_proc; | |
718 | task->tk_msg.rpc_argp = msg->rpc_argp; | |
719 | task->tk_msg.rpc_resp = msg->rpc_resp; | |
a17c2153 TM |
720 | if (msg->rpc_cred != NULL) |
721 | task->tk_msg.rpc_cred = get_rpccred(msg->rpc_cred); | |
58f9612c TM |
722 | } |
723 | } | |
724 | ||
1da177e4 LT |
725 | /* |
726 | * Default callback for async RPC calls | |
727 | */ | |
728 | static void | |
963d8fe5 | 729 | rpc_default_callback(struct rpc_task *task, void *data) |
1da177e4 LT |
730 | { |
731 | } | |
732 | ||
963d8fe5 TM |
733 | static const struct rpc_call_ops rpc_default_ops = { |
734 | .rpc_call_done = rpc_default_callback, | |
735 | }; | |
736 | ||
c970aa85 TM |
737 | /** |
738 | * rpc_run_task - Allocate a new RPC task, then run rpc_execute against it | |
739 | * @task_setup_data: pointer to task initialisation data | |
740 | */ | |
741 | struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data) | |
6e5b70e9 | 742 | { |
19445b99 | 743 | struct rpc_task *task; |
6e5b70e9 | 744 | |
84115e1c | 745 | task = rpc_new_task(task_setup_data); |
19445b99 | 746 | if (IS_ERR(task)) |
50859259 | 747 | goto out; |
6e5b70e9 | 748 | |
58f9612c TM |
749 | rpc_task_set_client(task, task_setup_data->rpc_client); |
750 | rpc_task_set_rpc_message(task, task_setup_data->rpc_message); | |
751 | ||
58f9612c TM |
752 | if (task->tk_action == NULL) |
753 | rpc_call_start(task); | |
754 | ||
6e5b70e9 TM |
755 | atomic_inc(&task->tk_count); |
756 | rpc_execute(task); | |
6e5b70e9 | 757 | out: |
19445b99 | 758 | return task; |
6e5b70e9 | 759 | } |
c970aa85 | 760 | EXPORT_SYMBOL_GPL(rpc_run_task); |
6e5b70e9 TM |
761 | |
762 | /** | |
763 | * rpc_call_sync - Perform a synchronous RPC call | |
764 | * @clnt: pointer to RPC client | |
765 | * @msg: RPC call parameters | |
766 | * @flags: RPC call flags | |
1da177e4 | 767 | */ |
cbc20059 | 768 | int rpc_call_sync(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags) |
1da177e4 LT |
769 | { |
770 | struct rpc_task *task; | |
84115e1c TM |
771 | struct rpc_task_setup task_setup_data = { |
772 | .rpc_client = clnt, | |
773 | .rpc_message = msg, | |
774 | .callback_ops = &rpc_default_ops, | |
775 | .flags = flags, | |
776 | }; | |
6e5b70e9 | 777 | int status; |
1da177e4 | 778 | |
1da177e4 LT |
779 | BUG_ON(flags & RPC_TASK_ASYNC); |
780 | ||
c970aa85 | 781 | task = rpc_run_task(&task_setup_data); |
6e5b70e9 TM |
782 | if (IS_ERR(task)) |
783 | return PTR_ERR(task); | |
e60859ac | 784 | status = task->tk_status; |
bde8f00c | 785 | rpc_put_task(task); |
1da177e4 LT |
786 | return status; |
787 | } | |
e8914c65 | 788 | EXPORT_SYMBOL_GPL(rpc_call_sync); |
1da177e4 | 789 | |
6e5b70e9 TM |
790 | /** |
791 | * rpc_call_async - Perform an asynchronous RPC call | |
792 | * @clnt: pointer to RPC client | |
793 | * @msg: RPC call parameters | |
794 | * @flags: RPC call flags | |
65b6e42c | 795 | * @tk_ops: RPC call ops |
6e5b70e9 | 796 | * @data: user call data |
1da177e4 LT |
797 | */ |
798 | int | |
cbc20059 | 799 | rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags, |
963d8fe5 | 800 | const struct rpc_call_ops *tk_ops, void *data) |
1da177e4 LT |
801 | { |
802 | struct rpc_task *task; | |
84115e1c TM |
803 | struct rpc_task_setup task_setup_data = { |
804 | .rpc_client = clnt, | |
805 | .rpc_message = msg, | |
806 | .callback_ops = tk_ops, | |
807 | .callback_data = data, | |
808 | .flags = flags|RPC_TASK_ASYNC, | |
809 | }; | |
1da177e4 | 810 | |
c970aa85 | 811 | task = rpc_run_task(&task_setup_data); |
6e5b70e9 TM |
812 | if (IS_ERR(task)) |
813 | return PTR_ERR(task); | |
814 | rpc_put_task(task); | |
815 | return 0; | |
1da177e4 | 816 | } |
e8914c65 | 817 | EXPORT_SYMBOL_GPL(rpc_call_async); |
1da177e4 | 818 | |
9e00abc3 | 819 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
55ae1aab RL |
820 | /** |
821 | * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run | |
822 | * rpc_execute against it | |
7a73fdde JSR |
823 | * @req: RPC request |
824 | * @tk_ops: RPC call ops | |
55ae1aab RL |
825 | */ |
826 | struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req, | |
7a73fdde | 827 | const struct rpc_call_ops *tk_ops) |
55ae1aab RL |
828 | { |
829 | struct rpc_task *task; | |
830 | struct xdr_buf *xbufp = &req->rq_snd_buf; | |
831 | struct rpc_task_setup task_setup_data = { | |
832 | .callback_ops = tk_ops, | |
833 | }; | |
834 | ||
835 | dprintk("RPC: rpc_run_bc_task req= %p\n", req); | |
836 | /* | |
837 | * Create an rpc_task to send the data | |
838 | */ | |
839 | task = rpc_new_task(&task_setup_data); | |
19445b99 | 840 | if (IS_ERR(task)) { |
55ae1aab RL |
841 | xprt_free_bc_request(req); |
842 | goto out; | |
843 | } | |
844 | task->tk_rqstp = req; | |
845 | ||
846 | /* | |
847 | * Set up the xdr_buf length. | |
848 | * This also indicates that the buffer is XDR encoded already. | |
849 | */ | |
850 | xbufp->len = xbufp->head[0].iov_len + xbufp->page_len + | |
851 | xbufp->tail[0].iov_len; | |
852 | ||
853 | task->tk_action = call_bc_transmit; | |
854 | atomic_inc(&task->tk_count); | |
855 | BUG_ON(atomic_read(&task->tk_count) != 2); | |
856 | rpc_execute(task); | |
857 | ||
858 | out: | |
859 | dprintk("RPC: rpc_run_bc_task: task= %p\n", task); | |
860 | return task; | |
861 | } | |
9e00abc3 | 862 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
55ae1aab | 863 | |
77de2c59 TM |
864 | void |
865 | rpc_call_start(struct rpc_task *task) | |
866 | { | |
867 | task->tk_action = call_start; | |
868 | } | |
869 | EXPORT_SYMBOL_GPL(rpc_call_start); | |
870 | ||
ed39440a CL |
871 | /** |
872 | * rpc_peeraddr - extract remote peer address from clnt's xprt | |
873 | * @clnt: RPC client structure | |
874 | * @buf: target buffer | |
65b6e42c | 875 | * @bufsize: length of target buffer |
ed39440a CL |
876 | * |
877 | * Returns the number of bytes that are actually in the stored address. | |
878 | */ | |
879 | size_t rpc_peeraddr(struct rpc_clnt *clnt, struct sockaddr *buf, size_t bufsize) | |
880 | { | |
881 | size_t bytes; | |
882 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
883 | ||
884 | bytes = sizeof(xprt->addr); | |
885 | if (bytes > bufsize) | |
886 | bytes = bufsize; | |
887 | memcpy(buf, &clnt->cl_xprt->addr, bytes); | |
c4efcb1d | 888 | return xprt->addrlen; |
ed39440a | 889 | } |
b86acd50 | 890 | EXPORT_SYMBOL_GPL(rpc_peeraddr); |
ed39440a | 891 | |
f425eba4 CL |
892 | /** |
893 | * rpc_peeraddr2str - return remote peer address in printable format | |
894 | * @clnt: RPC client structure | |
895 | * @format: address format | |
896 | * | |
897 | */ | |
b454ae90 CL |
898 | const char *rpc_peeraddr2str(struct rpc_clnt *clnt, |
899 | enum rpc_display_format_t format) | |
f425eba4 CL |
900 | { |
901 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
7559c7a2 CL |
902 | |
903 | if (xprt->address_strings[format] != NULL) | |
904 | return xprt->address_strings[format]; | |
905 | else | |
906 | return "unprintable"; | |
f425eba4 | 907 | } |
b86acd50 | 908 | EXPORT_SYMBOL_GPL(rpc_peeraddr2str); |
f425eba4 | 909 | |
1da177e4 LT |
910 | void |
911 | rpc_setbufsize(struct rpc_clnt *clnt, unsigned int sndsize, unsigned int rcvsize) | |
912 | { | |
913 | struct rpc_xprt *xprt = clnt->cl_xprt; | |
470056c2 CL |
914 | if (xprt->ops->set_buffer_size) |
915 | xprt->ops->set_buffer_size(xprt, sndsize, rcvsize); | |
1da177e4 | 916 | } |
e8914c65 | 917 | EXPORT_SYMBOL_GPL(rpc_setbufsize); |
1da177e4 LT |
918 | |
919 | /* | |
920 | * Return size of largest payload RPC client can support, in bytes | |
921 | * | |
922 | * For stream transports, this is one RPC record fragment (see RFC | |
923 | * 1831), as we don't support multi-record requests yet. For datagram | |
924 | * transports, this is the size of an IP packet minus the IP, UDP, and | |
925 | * RPC header sizes. | |
926 | */ | |
927 | size_t rpc_max_payload(struct rpc_clnt *clnt) | |
928 | { | |
929 | return clnt->cl_xprt->max_payload; | |
930 | } | |
b86acd50 | 931 | EXPORT_SYMBOL_GPL(rpc_max_payload); |
1da177e4 | 932 | |
35f5a422 CL |
933 | /** |
934 | * rpc_force_rebind - force transport to check that remote port is unchanged | |
935 | * @clnt: client to rebind | |
936 | * | |
937 | */ | |
938 | void rpc_force_rebind(struct rpc_clnt *clnt) | |
939 | { | |
940 | if (clnt->cl_autobind) | |
ec739ef0 | 941 | xprt_clear_bound(clnt->cl_xprt); |
35f5a422 | 942 | } |
b86acd50 | 943 | EXPORT_SYMBOL_GPL(rpc_force_rebind); |
35f5a422 | 944 | |
aae2006e AA |
945 | /* |
946 | * Restart an (async) RPC call from the call_prepare state. | |
947 | * Usually called from within the exit handler. | |
948 | */ | |
f1f88fc7 | 949 | int |
aae2006e AA |
950 | rpc_restart_call_prepare(struct rpc_task *task) |
951 | { | |
952 | if (RPC_ASSASSINATED(task)) | |
f1f88fc7 | 953 | return 0; |
d00c5d43 TM |
954 | task->tk_action = call_start; |
955 | if (task->tk_ops->rpc_call_prepare != NULL) | |
956 | task->tk_action = rpc_prepare_task; | |
f1f88fc7 | 957 | return 1; |
aae2006e AA |
958 | } |
959 | EXPORT_SYMBOL_GPL(rpc_restart_call_prepare); | |
960 | ||
1da177e4 LT |
961 | /* |
962 | * Restart an (async) RPC call. Usually called from within the | |
963 | * exit handler. | |
964 | */ | |
f1f88fc7 | 965 | int |
1da177e4 LT |
966 | rpc_restart_call(struct rpc_task *task) |
967 | { | |
968 | if (RPC_ASSASSINATED(task)) | |
f1f88fc7 | 969 | return 0; |
1da177e4 | 970 | task->tk_action = call_start; |
f1f88fc7 | 971 | return 1; |
1da177e4 | 972 | } |
e8914c65 | 973 | EXPORT_SYMBOL_GPL(rpc_restart_call); |
1da177e4 | 974 | |
3748f1e4 CL |
975 | #ifdef RPC_DEBUG |
976 | static const char *rpc_proc_name(const struct rpc_task *task) | |
977 | { | |
978 | const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; | |
979 | ||
980 | if (proc) { | |
981 | if (proc->p_name) | |
982 | return proc->p_name; | |
983 | else | |
984 | return "NULL"; | |
985 | } else | |
986 | return "no proc"; | |
987 | } | |
988 | #endif | |
989 | ||
1da177e4 LT |
990 | /* |
991 | * 0. Initial state | |
992 | * | |
993 | * Other FSM states can be visited zero or more times, but | |
994 | * this state is visited exactly once for each RPC. | |
995 | */ | |
996 | static void | |
997 | call_start(struct rpc_task *task) | |
998 | { | |
999 | struct rpc_clnt *clnt = task->tk_client; | |
1000 | ||
3748f1e4 | 1001 | dprintk("RPC: %5u call_start %s%d proc %s (%s)\n", task->tk_pid, |
46121cf7 | 1002 | clnt->cl_protname, clnt->cl_vers, |
3748f1e4 | 1003 | rpc_proc_name(task), |
46121cf7 | 1004 | (RPC_IS_ASYNC(task) ? "async" : "sync")); |
1da177e4 LT |
1005 | |
1006 | /* Increment call count */ | |
1007 | task->tk_msg.rpc_proc->p_count++; | |
1008 | clnt->cl_stats->rpccnt++; | |
1009 | task->tk_action = call_reserve; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * 1. Reserve an RPC call slot | |
1014 | */ | |
1015 | static void | |
1016 | call_reserve(struct rpc_task *task) | |
1017 | { | |
46121cf7 | 1018 | dprint_status(task); |
1da177e4 | 1019 | |
1da177e4 LT |
1020 | task->tk_status = 0; |
1021 | task->tk_action = call_reserveresult; | |
1022 | xprt_reserve(task); | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * 1b. Grok the result of xprt_reserve() | |
1027 | */ | |
1028 | static void | |
1029 | call_reserveresult(struct rpc_task *task) | |
1030 | { | |
1031 | int status = task->tk_status; | |
1032 | ||
46121cf7 | 1033 | dprint_status(task); |
1da177e4 LT |
1034 | |
1035 | /* | |
1036 | * After a call to xprt_reserve(), we must have either | |
1037 | * a request slot or else an error status. | |
1038 | */ | |
1039 | task->tk_status = 0; | |
1040 | if (status >= 0) { | |
1041 | if (task->tk_rqstp) { | |
f2d47d02 | 1042 | task->tk_action = call_refresh; |
1da177e4 LT |
1043 | return; |
1044 | } | |
1045 | ||
1046 | printk(KERN_ERR "%s: status=%d, but no request slot, exiting\n", | |
0dc47877 | 1047 | __func__, status); |
1da177e4 LT |
1048 | rpc_exit(task, -EIO); |
1049 | return; | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * Even though there was an error, we may have acquired | |
1054 | * a request slot somehow. Make sure not to leak it. | |
1055 | */ | |
1056 | if (task->tk_rqstp) { | |
1057 | printk(KERN_ERR "%s: status=%d, request allocated anyway\n", | |
0dc47877 | 1058 | __func__, status); |
1da177e4 LT |
1059 | xprt_release(task); |
1060 | } | |
1061 | ||
1062 | switch (status) { | |
1063 | case -EAGAIN: /* woken up; retry */ | |
1064 | task->tk_action = call_reserve; | |
1065 | return; | |
1066 | case -EIO: /* probably a shutdown */ | |
1067 | break; | |
1068 | default: | |
1069 | printk(KERN_ERR "%s: unrecognized error %d, exiting\n", | |
0dc47877 | 1070 | __func__, status); |
1da177e4 LT |
1071 | break; |
1072 | } | |
1073 | rpc_exit(task, status); | |
1074 | } | |
1075 | ||
1076 | /* | |
55576244 BF |
1077 | * 2. Bind and/or refresh the credentials |
1078 | */ | |
1079 | static void | |
1080 | call_refresh(struct rpc_task *task) | |
1081 | { | |
1082 | dprint_status(task); | |
1083 | ||
1084 | task->tk_action = call_refreshresult; | |
1085 | task->tk_status = 0; | |
1086 | task->tk_client->cl_stats->rpcauthrefresh++; | |
1087 | rpcauth_refreshcred(task); | |
1088 | } | |
1089 | ||
1090 | /* | |
1091 | * 2a. Process the results of a credential refresh | |
1092 | */ | |
1093 | static void | |
1094 | call_refreshresult(struct rpc_task *task) | |
1095 | { | |
1096 | int status = task->tk_status; | |
1097 | ||
1098 | dprint_status(task); | |
1099 | ||
1100 | task->tk_status = 0; | |
5fc43978 | 1101 | task->tk_action = call_refresh; |
55576244 | 1102 | switch (status) { |
5fc43978 TM |
1103 | case 0: |
1104 | if (rpcauth_uptodatecred(task)) | |
1105 | task->tk_action = call_allocate; | |
55576244 BF |
1106 | return; |
1107 | case -ETIMEDOUT: | |
1108 | rpc_delay(task, 3*HZ); | |
5fc43978 TM |
1109 | case -EAGAIN: |
1110 | status = -EACCES; | |
1111 | if (!task->tk_cred_retry) | |
1112 | break; | |
1113 | task->tk_cred_retry--; | |
1114 | dprintk("RPC: %5u %s: retry refresh creds\n", | |
1115 | task->tk_pid, __func__); | |
1116 | return; | |
55576244 | 1117 | } |
5fc43978 TM |
1118 | dprintk("RPC: %5u %s: refresh creds failed with error %d\n", |
1119 | task->tk_pid, __func__, status); | |
1120 | rpc_exit(task, status); | |
55576244 BF |
1121 | } |
1122 | ||
1123 | /* | |
1124 | * 2b. Allocate the buffer. For details, see sched.c:rpc_malloc. | |
02107148 | 1125 | * (Note: buffer memory is freed in xprt_release). |
1da177e4 LT |
1126 | */ |
1127 | static void | |
1128 | call_allocate(struct rpc_task *task) | |
1129 | { | |
f2d47d02 | 1130 | unsigned int slack = task->tk_rqstp->rq_cred->cr_auth->au_cslack; |
02107148 CL |
1131 | struct rpc_rqst *req = task->tk_rqstp; |
1132 | struct rpc_xprt *xprt = task->tk_xprt; | |
2bea90d4 | 1133 | struct rpc_procinfo *proc = task->tk_msg.rpc_proc; |
1da177e4 | 1134 | |
46121cf7 CL |
1135 | dprint_status(task); |
1136 | ||
2bea90d4 | 1137 | task->tk_status = 0; |
f2d47d02 | 1138 | task->tk_action = call_bind; |
2bea90d4 | 1139 | |
02107148 | 1140 | if (req->rq_buffer) |
1da177e4 LT |
1141 | return; |
1142 | ||
2bea90d4 CL |
1143 | if (proc->p_proc != 0) { |
1144 | BUG_ON(proc->p_arglen == 0); | |
1145 | if (proc->p_decode != NULL) | |
1146 | BUG_ON(proc->p_replen == 0); | |
1147 | } | |
1da177e4 | 1148 | |
2bea90d4 CL |
1149 | /* |
1150 | * Calculate the size (in quads) of the RPC call | |
1151 | * and reply headers, and convert both values | |
1152 | * to byte sizes. | |
1153 | */ | |
1154 | req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen; | |
1155 | req->rq_callsize <<= 2; | |
1156 | req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen; | |
1157 | req->rq_rcvsize <<= 2; | |
1158 | ||
c5a4dd8b CL |
1159 | req->rq_buffer = xprt->ops->buf_alloc(task, |
1160 | req->rq_callsize + req->rq_rcvsize); | |
2bea90d4 | 1161 | if (req->rq_buffer != NULL) |
1da177e4 | 1162 | return; |
46121cf7 CL |
1163 | |
1164 | dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid); | |
1da177e4 | 1165 | |
5afa9133 | 1166 | if (RPC_IS_ASYNC(task) || !fatal_signal_pending(current)) { |
b6e9c713 | 1167 | task->tk_action = call_allocate; |
1da177e4 LT |
1168 | rpc_delay(task, HZ>>4); |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | rpc_exit(task, -ERESTARTSYS); | |
1173 | } | |
1174 | ||
940e3318 TM |
1175 | static inline int |
1176 | rpc_task_need_encode(struct rpc_task *task) | |
1177 | { | |
1178 | return task->tk_rqstp->rq_snd_buf.len == 0; | |
1179 | } | |
1180 | ||
1181 | static inline void | |
1182 | rpc_task_force_reencode(struct rpc_task *task) | |
1183 | { | |
1184 | task->tk_rqstp->rq_snd_buf.len = 0; | |
2574cc9f | 1185 | task->tk_rqstp->rq_bytes_sent = 0; |
940e3318 TM |
1186 | } |
1187 | ||
2bea90d4 CL |
1188 | static inline void |
1189 | rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) | |
1190 | { | |
1191 | buf->head[0].iov_base = start; | |
1192 | buf->head[0].iov_len = len; | |
1193 | buf->tail[0].iov_len = 0; | |
1194 | buf->page_len = 0; | |
4f22ccc3 | 1195 | buf->flags = 0; |
2bea90d4 CL |
1196 | buf->len = 0; |
1197 | buf->buflen = len; | |
1198 | } | |
1199 | ||
1da177e4 LT |
1200 | /* |
1201 | * 3. Encode arguments of an RPC call | |
1202 | */ | |
1203 | static void | |
b0e1c57e | 1204 | rpc_xdr_encode(struct rpc_task *task) |
1da177e4 | 1205 | { |
1da177e4 | 1206 | struct rpc_rqst *req = task->tk_rqstp; |
9f06c719 | 1207 | kxdreproc_t encode; |
d8ed029d | 1208 | __be32 *p; |
1da177e4 | 1209 | |
46121cf7 | 1210 | dprint_status(task); |
1da177e4 | 1211 | |
2bea90d4 CL |
1212 | rpc_xdr_buf_init(&req->rq_snd_buf, |
1213 | req->rq_buffer, | |
1214 | req->rq_callsize); | |
1215 | rpc_xdr_buf_init(&req->rq_rcv_buf, | |
1216 | (char *)req->rq_buffer + req->rq_callsize, | |
1217 | req->rq_rcvsize); | |
1da177e4 | 1218 | |
b0e1c57e CL |
1219 | p = rpc_encode_header(task); |
1220 | if (p == NULL) { | |
1221 | printk(KERN_INFO "RPC: couldn't encode RPC header, exit EIO\n"); | |
1da177e4 LT |
1222 | rpc_exit(task, -EIO); |
1223 | return; | |
1224 | } | |
b0e1c57e CL |
1225 | |
1226 | encode = task->tk_msg.rpc_proc->p_encode; | |
f3680312 BF |
1227 | if (encode == NULL) |
1228 | return; | |
1229 | ||
1230 | task->tk_status = rpcauth_wrap_req(task, encode, req, p, | |
1231 | task->tk_msg.rpc_argp); | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | /* | |
1235 | * 4. Get the server port number if not yet set | |
1236 | */ | |
1237 | static void | |
1238 | call_bind(struct rpc_task *task) | |
1239 | { | |
ec739ef0 | 1240 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 1241 | |
46121cf7 | 1242 | dprint_status(task); |
1da177e4 | 1243 | |
da351878 | 1244 | task->tk_action = call_connect; |
ec739ef0 | 1245 | if (!xprt_bound(xprt)) { |
da351878 | 1246 | task->tk_action = call_bind_status; |
ec739ef0 | 1247 | task->tk_timeout = xprt->bind_timeout; |
bbf7c1dd | 1248 | xprt->ops->rpcbind(task); |
1da177e4 LT |
1249 | } |
1250 | } | |
1251 | ||
1252 | /* | |
da351878 CL |
1253 | * 4a. Sort out bind result |
1254 | */ | |
1255 | static void | |
1256 | call_bind_status(struct rpc_task *task) | |
1257 | { | |
906462af | 1258 | int status = -EIO; |
da351878 CL |
1259 | |
1260 | if (task->tk_status >= 0) { | |
46121cf7 | 1261 | dprint_status(task); |
da351878 CL |
1262 | task->tk_status = 0; |
1263 | task->tk_action = call_connect; | |
1264 | return; | |
1265 | } | |
1266 | ||
1267 | switch (task->tk_status) { | |
381ba74a TM |
1268 | case -ENOMEM: |
1269 | dprintk("RPC: %5u rpcbind out of memory\n", task->tk_pid); | |
1270 | rpc_delay(task, HZ >> 2); | |
2429cbf6 | 1271 | goto retry_timeout; |
da351878 | 1272 | case -EACCES: |
46121cf7 CL |
1273 | dprintk("RPC: %5u remote rpcbind: RPC program/version " |
1274 | "unavailable\n", task->tk_pid); | |
b79dc8ce CL |
1275 | /* fail immediately if this is an RPC ping */ |
1276 | if (task->tk_msg.rpc_proc->p_proc == 0) { | |
1277 | status = -EOPNOTSUPP; | |
1278 | break; | |
1279 | } | |
0b760113 TM |
1280 | if (task->tk_rebind_retry == 0) |
1281 | break; | |
1282 | task->tk_rebind_retry--; | |
ea635a51 | 1283 | rpc_delay(task, 3*HZ); |
da45828e | 1284 | goto retry_timeout; |
da351878 | 1285 | case -ETIMEDOUT: |
46121cf7 | 1286 | dprintk("RPC: %5u rpcbind request timed out\n", |
da351878 | 1287 | task->tk_pid); |
da45828e | 1288 | goto retry_timeout; |
da351878 | 1289 | case -EPFNOSUPPORT: |
906462af | 1290 | /* server doesn't support any rpcbind version we know of */ |
012da158 | 1291 | dprintk("RPC: %5u unrecognized remote rpcbind service\n", |
da351878 CL |
1292 | task->tk_pid); |
1293 | break; | |
1294 | case -EPROTONOSUPPORT: | |
00a6e7bb | 1295 | dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n", |
da351878 | 1296 | task->tk_pid); |
00a6e7bb CL |
1297 | task->tk_status = 0; |
1298 | task->tk_action = call_bind; | |
1299 | return; | |
012da158 CL |
1300 | case -ECONNREFUSED: /* connection problems */ |
1301 | case -ECONNRESET: | |
1302 | case -ENOTCONN: | |
1303 | case -EHOSTDOWN: | |
1304 | case -EHOSTUNREACH: | |
1305 | case -ENETUNREACH: | |
1306 | case -EPIPE: | |
1307 | dprintk("RPC: %5u remote rpcbind unreachable: %d\n", | |
1308 | task->tk_pid, task->tk_status); | |
1309 | if (!RPC_IS_SOFTCONN(task)) { | |
1310 | rpc_delay(task, 5*HZ); | |
1311 | goto retry_timeout; | |
1312 | } | |
1313 | status = task->tk_status; | |
1314 | break; | |
da351878 | 1315 | default: |
46121cf7 | 1316 | dprintk("RPC: %5u unrecognized rpcbind error (%d)\n", |
da351878 | 1317 | task->tk_pid, -task->tk_status); |
da351878 CL |
1318 | } |
1319 | ||
1320 | rpc_exit(task, status); | |
1321 | return; | |
1322 | ||
da45828e TM |
1323 | retry_timeout: |
1324 | task->tk_action = call_timeout; | |
da351878 CL |
1325 | } |
1326 | ||
1327 | /* | |
1328 | * 4b. Connect to the RPC server | |
1da177e4 LT |
1329 | */ |
1330 | static void | |
1331 | call_connect(struct rpc_task *task) | |
1332 | { | |
da351878 | 1333 | struct rpc_xprt *xprt = task->tk_xprt; |
1da177e4 | 1334 | |
46121cf7 | 1335 | dprintk("RPC: %5u call_connect xprt %p %s connected\n", |
da351878 CL |
1336 | task->tk_pid, xprt, |
1337 | (xprt_connected(xprt) ? "is" : "is not")); | |
1da177e4 | 1338 | |
da351878 CL |
1339 | task->tk_action = call_transmit; |
1340 | if (!xprt_connected(xprt)) { | |
1341 | task->tk_action = call_connect_status; | |
1342 | if (task->tk_status < 0) | |
1343 | return; | |
1344 | xprt_connect(task); | |
1da177e4 | 1345 | } |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | /* | |
da351878 | 1349 | * 4c. Sort out connect result |
1da177e4 LT |
1350 | */ |
1351 | static void | |
1352 | call_connect_status(struct rpc_task *task) | |
1353 | { | |
1354 | struct rpc_clnt *clnt = task->tk_client; | |
1355 | int status = task->tk_status; | |
1356 | ||
46121cf7 | 1357 | dprint_status(task); |
da351878 | 1358 | |
1da177e4 | 1359 | task->tk_status = 0; |
2a491991 | 1360 | if (status >= 0 || status == -EAGAIN) { |
1da177e4 LT |
1361 | clnt->cl_stats->netreconn++; |
1362 | task->tk_action = call_transmit; | |
1363 | return; | |
1364 | } | |
1365 | ||
1da177e4 | 1366 | switch (status) { |
da45828e TM |
1367 | /* if soft mounted, test if we've timed out */ |
1368 | case -ETIMEDOUT: | |
1369 | task->tk_action = call_timeout; | |
2a491991 TM |
1370 | break; |
1371 | default: | |
1372 | rpc_exit(task, -EIO); | |
1da177e4 LT |
1373 | } |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * 5. Transmit the RPC request, and wait for reply | |
1378 | */ | |
1379 | static void | |
1380 | call_transmit(struct rpc_task *task) | |
1381 | { | |
46121cf7 | 1382 | dprint_status(task); |
1da177e4 LT |
1383 | |
1384 | task->tk_action = call_status; | |
1385 | if (task->tk_status < 0) | |
1386 | return; | |
1387 | task->tk_status = xprt_prepare_transmit(task); | |
1388 | if (task->tk_status != 0) | |
1389 | return; | |
e0ab53de | 1390 | task->tk_action = call_transmit_status; |
1da177e4 | 1391 | /* Encode here so that rpcsec_gss can use correct sequence number. */ |
940e3318 | 1392 | if (rpc_task_need_encode(task)) { |
e0ab53de | 1393 | BUG_ON(task->tk_rqstp->rq_bytes_sent != 0); |
b0e1c57e | 1394 | rpc_xdr_encode(task); |
5e5ce5be | 1395 | /* Did the encode result in an error condition? */ |
8b39f2b4 TM |
1396 | if (task->tk_status != 0) { |
1397 | /* Was the error nonfatal? */ | |
1398 | if (task->tk_status == -EAGAIN) | |
1399 | rpc_delay(task, HZ >> 4); | |
1400 | else | |
1401 | rpc_exit(task, task->tk_status); | |
e0ab53de | 1402 | return; |
8b39f2b4 | 1403 | } |
5e5ce5be | 1404 | } |
1da177e4 LT |
1405 | xprt_transmit(task); |
1406 | if (task->tk_status < 0) | |
1407 | return; | |
e0ab53de TM |
1408 | /* |
1409 | * On success, ensure that we call xprt_end_transmit() before sleeping | |
1410 | * in order to allow access to the socket to other RPC requests. | |
1411 | */ | |
1412 | call_transmit_status(task); | |
55ae1aab | 1413 | if (rpc_reply_expected(task)) |
e0ab53de TM |
1414 | return; |
1415 | task->tk_action = rpc_exit_task; | |
fda13939 | 1416 | rpc_wake_up_queued_task(&task->tk_xprt->pending, task); |
e0ab53de TM |
1417 | } |
1418 | ||
1419 | /* | |
1420 | * 5a. Handle cleanup after a transmission | |
1421 | */ | |
1422 | static void | |
1423 | call_transmit_status(struct rpc_task *task) | |
1424 | { | |
1425 | task->tk_action = call_status; | |
206a134b CL |
1426 | |
1427 | /* | |
1428 | * Common case: success. Force the compiler to put this | |
1429 | * test first. | |
1430 | */ | |
1431 | if (task->tk_status == 0) { | |
1432 | xprt_end_transmit(task); | |
1433 | rpc_task_force_reencode(task); | |
1434 | return; | |
1435 | } | |
1436 | ||
15f081ca TM |
1437 | switch (task->tk_status) { |
1438 | case -EAGAIN: | |
1439 | break; | |
1440 | default: | |
206a134b | 1441 | dprint_status(task); |
15f081ca | 1442 | xprt_end_transmit(task); |
09a21c41 CL |
1443 | rpc_task_force_reencode(task); |
1444 | break; | |
15f081ca TM |
1445 | /* |
1446 | * Special cases: if we've been waiting on the | |
1447 | * socket's write_space() callback, or if the | |
1448 | * socket just returned a connection error, | |
1449 | * then hold onto the transport lock. | |
1450 | */ | |
1451 | case -ECONNREFUSED: | |
15f081ca TM |
1452 | case -EHOSTDOWN: |
1453 | case -EHOSTUNREACH: | |
1454 | case -ENETUNREACH: | |
09a21c41 CL |
1455 | if (RPC_IS_SOFTCONN(task)) { |
1456 | xprt_end_transmit(task); | |
1457 | rpc_exit(task, task->tk_status); | |
1458 | break; | |
1459 | } | |
1460 | case -ECONNRESET: | |
1461 | case -ENOTCONN: | |
c8485e4d | 1462 | case -EPIPE: |
15f081ca TM |
1463 | rpc_task_force_reencode(task); |
1464 | } | |
1da177e4 LT |
1465 | } |
1466 | ||
9e00abc3 | 1467 | #if defined(CONFIG_SUNRPC_BACKCHANNEL) |
55ae1aab RL |
1468 | /* |
1469 | * 5b. Send the backchannel RPC reply. On error, drop the reply. In | |
1470 | * addition, disconnect on connectivity errors. | |
1471 | */ | |
1472 | static void | |
1473 | call_bc_transmit(struct rpc_task *task) | |
1474 | { | |
1475 | struct rpc_rqst *req = task->tk_rqstp; | |
1476 | ||
1477 | BUG_ON(task->tk_status != 0); | |
1478 | task->tk_status = xprt_prepare_transmit(task); | |
1479 | if (task->tk_status == -EAGAIN) { | |
1480 | /* | |
1481 | * Could not reserve the transport. Try again after the | |
1482 | * transport is released. | |
1483 | */ | |
1484 | task->tk_status = 0; | |
1485 | task->tk_action = call_bc_transmit; | |
1486 | return; | |
1487 | } | |
1488 | ||
1489 | task->tk_action = rpc_exit_task; | |
1490 | if (task->tk_status < 0) { | |
1491 | printk(KERN_NOTICE "RPC: Could not send backchannel reply " | |
1492 | "error: %d\n", task->tk_status); | |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | xprt_transmit(task); | |
1497 | xprt_end_transmit(task); | |
1498 | dprint_status(task); | |
1499 | switch (task->tk_status) { | |
1500 | case 0: | |
1501 | /* Success */ | |
1502 | break; | |
1503 | case -EHOSTDOWN: | |
1504 | case -EHOSTUNREACH: | |
1505 | case -ENETUNREACH: | |
1506 | case -ETIMEDOUT: | |
1507 | /* | |
1508 | * Problem reaching the server. Disconnect and let the | |
1509 | * forechannel reestablish the connection. The server will | |
1510 | * have to retransmit the backchannel request and we'll | |
1511 | * reprocess it. Since these ops are idempotent, there's no | |
1512 | * need to cache our reply at this time. | |
1513 | */ | |
1514 | printk(KERN_NOTICE "RPC: Could not send backchannel reply " | |
1515 | "error: %d\n", task->tk_status); | |
1516 | xprt_conditional_disconnect(task->tk_xprt, | |
1517 | req->rq_connect_cookie); | |
1518 | break; | |
1519 | default: | |
1520 | /* | |
1521 | * We were unable to reply and will have to drop the | |
1522 | * request. The server should reconnect and retransmit. | |
1523 | */ | |
1524 | BUG_ON(task->tk_status == -EAGAIN); | |
1525 | printk(KERN_NOTICE "RPC: Could not send backchannel reply " | |
1526 | "error: %d\n", task->tk_status); | |
1527 | break; | |
1528 | } | |
1529 | rpc_wake_up_queued_task(&req->rq_xprt->pending, task); | |
1530 | } | |
9e00abc3 | 1531 | #endif /* CONFIG_SUNRPC_BACKCHANNEL */ |
55ae1aab | 1532 | |
1da177e4 LT |
1533 | /* |
1534 | * 6. Sort out the RPC call status | |
1535 | */ | |
1536 | static void | |
1537 | call_status(struct rpc_task *task) | |
1538 | { | |
1539 | struct rpc_clnt *clnt = task->tk_client; | |
1540 | struct rpc_rqst *req = task->tk_rqstp; | |
1541 | int status; | |
1542 | ||
dd2b63d0 RL |
1543 | if (req->rq_reply_bytes_recvd > 0 && !req->rq_bytes_sent) |
1544 | task->tk_status = req->rq_reply_bytes_recvd; | |
1da177e4 | 1545 | |
46121cf7 | 1546 | dprint_status(task); |
1da177e4 LT |
1547 | |
1548 | status = task->tk_status; | |
1549 | if (status >= 0) { | |
1550 | task->tk_action = call_decode; | |
1551 | return; | |
1552 | } | |
1553 | ||
1554 | task->tk_status = 0; | |
1555 | switch(status) { | |
76303992 TM |
1556 | case -EHOSTDOWN: |
1557 | case -EHOSTUNREACH: | |
1558 | case -ENETUNREACH: | |
1559 | /* | |
1560 | * Delay any retries for 3 seconds, then handle as if it | |
1561 | * were a timeout. | |
1562 | */ | |
1563 | rpc_delay(task, 3*HZ); | |
1da177e4 LT |
1564 | case -ETIMEDOUT: |
1565 | task->tk_action = call_timeout; | |
241c39b9 | 1566 | if (task->tk_client->cl_discrtry) |
7c1d71cf TM |
1567 | xprt_conditional_disconnect(task->tk_xprt, |
1568 | req->rq_connect_cookie); | |
1da177e4 | 1569 | break; |
c8485e4d | 1570 | case -ECONNRESET: |
1da177e4 | 1571 | case -ECONNREFUSED: |
35f5a422 | 1572 | rpc_force_rebind(clnt); |
c8485e4d TM |
1573 | rpc_delay(task, 3*HZ); |
1574 | case -EPIPE: | |
1575 | case -ENOTCONN: | |
1da177e4 LT |
1576 | task->tk_action = call_bind; |
1577 | break; | |
1578 | case -EAGAIN: | |
1579 | task->tk_action = call_transmit; | |
1580 | break; | |
1581 | case -EIO: | |
1582 | /* shutdown or soft timeout */ | |
1583 | rpc_exit(task, status); | |
1584 | break; | |
1585 | default: | |
b6b6152c OK |
1586 | if (clnt->cl_chatty) |
1587 | printk("%s: RPC call returned error %d\n", | |
1da177e4 LT |
1588 | clnt->cl_protname, -status); |
1589 | rpc_exit(task, status); | |
1da177e4 LT |
1590 | } |
1591 | } | |
1592 | ||
1593 | /* | |
e0ab53de | 1594 | * 6a. Handle RPC timeout |
1da177e4 LT |
1595 | * We do not release the request slot, so we keep using the |
1596 | * same XID for all retransmits. | |
1597 | */ | |
1598 | static void | |
1599 | call_timeout(struct rpc_task *task) | |
1600 | { | |
1601 | struct rpc_clnt *clnt = task->tk_client; | |
1602 | ||
1603 | if (xprt_adjust_timeout(task->tk_rqstp) == 0) { | |
46121cf7 | 1604 | dprintk("RPC: %5u call_timeout (minor)\n", task->tk_pid); |
1da177e4 LT |
1605 | goto retry; |
1606 | } | |
1607 | ||
46121cf7 | 1608 | dprintk("RPC: %5u call_timeout (major)\n", task->tk_pid); |
ef759a2e CL |
1609 | task->tk_timeouts++; |
1610 | ||
3a28becc CL |
1611 | if (RPC_IS_SOFTCONN(task)) { |
1612 | rpc_exit(task, -ETIMEDOUT); | |
1613 | return; | |
1614 | } | |
1da177e4 | 1615 | if (RPC_IS_SOFT(task)) { |
b6b6152c OK |
1616 | if (clnt->cl_chatty) |
1617 | printk(KERN_NOTICE "%s: server %s not responding, timed out\n", | |
1da177e4 | 1618 | clnt->cl_protname, clnt->cl_server); |
7494d00c TM |
1619 | if (task->tk_flags & RPC_TASK_TIMEOUT) |
1620 | rpc_exit(task, -ETIMEDOUT); | |
1621 | else | |
1622 | rpc_exit(task, -EIO); | |
1da177e4 LT |
1623 | return; |
1624 | } | |
1625 | ||
f518e35a | 1626 | if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) { |
1da177e4 | 1627 | task->tk_flags |= RPC_CALL_MAJORSEEN; |
b6b6152c OK |
1628 | if (clnt->cl_chatty) |
1629 | printk(KERN_NOTICE "%s: server %s not responding, still trying\n", | |
1da177e4 LT |
1630 | clnt->cl_protname, clnt->cl_server); |
1631 | } | |
35f5a422 | 1632 | rpc_force_rebind(clnt); |
b48633bd TM |
1633 | /* |
1634 | * Did our request time out due to an RPCSEC_GSS out-of-sequence | |
1635 | * event? RFC2203 requires the server to drop all such requests. | |
1636 | */ | |
1637 | rpcauth_invalcred(task); | |
1da177e4 LT |
1638 | |
1639 | retry: | |
1640 | clnt->cl_stats->rpcretrans++; | |
1641 | task->tk_action = call_bind; | |
1642 | task->tk_status = 0; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * 7. Decode the RPC reply | |
1647 | */ | |
1648 | static void | |
1649 | call_decode(struct rpc_task *task) | |
1650 | { | |
1651 | struct rpc_clnt *clnt = task->tk_client; | |
1652 | struct rpc_rqst *req = task->tk_rqstp; | |
bf269551 | 1653 | kxdrdproc_t decode = task->tk_msg.rpc_proc->p_decode; |
d8ed029d | 1654 | __be32 *p; |
1da177e4 | 1655 | |
726fd6ad | 1656 | dprint_status(task); |
1da177e4 | 1657 | |
f518e35a | 1658 | if (task->tk_flags & RPC_CALL_MAJORSEEN) { |
b6b6152c OK |
1659 | if (clnt->cl_chatty) |
1660 | printk(KERN_NOTICE "%s: server %s OK\n", | |
1661 | clnt->cl_protname, clnt->cl_server); | |
1da177e4 LT |
1662 | task->tk_flags &= ~RPC_CALL_MAJORSEEN; |
1663 | } | |
1664 | ||
43ac3f29 TM |
1665 | /* |
1666 | * Ensure that we see all writes made by xprt_complete_rqst() | |
dd2b63d0 | 1667 | * before it changed req->rq_reply_bytes_recvd. |
43ac3f29 TM |
1668 | */ |
1669 | smp_rmb(); | |
1da177e4 LT |
1670 | req->rq_rcv_buf.len = req->rq_private_buf.len; |
1671 | ||
1672 | /* Check that the softirq receive buffer is valid */ | |
1673 | WARN_ON(memcmp(&req->rq_rcv_buf, &req->rq_private_buf, | |
1674 | sizeof(req->rq_rcv_buf)) != 0); | |
1675 | ||
1e799b67 TM |
1676 | if (req->rq_rcv_buf.len < 12) { |
1677 | if (!RPC_IS_SOFT(task)) { | |
1678 | task->tk_action = call_bind; | |
1679 | clnt->cl_stats->rpcretrans++; | |
1680 | goto out_retry; | |
1681 | } | |
1682 | dprintk("RPC: %s: too small RPC reply size (%d bytes)\n", | |
1683 | clnt->cl_protname, task->tk_status); | |
1684 | task->tk_action = call_timeout; | |
1685 | goto out_retry; | |
1686 | } | |
1687 | ||
b0e1c57e | 1688 | p = rpc_verify_header(task); |
abbcf28f TM |
1689 | if (IS_ERR(p)) { |
1690 | if (p == ERR_PTR(-EAGAIN)) | |
1691 | goto out_retry; | |
1692 | return; | |
1da177e4 LT |
1693 | } |
1694 | ||
abbcf28f | 1695 | task->tk_action = rpc_exit_task; |
1da177e4 | 1696 | |
6d5fcb5a | 1697 | if (decode) { |
1da177e4 LT |
1698 | task->tk_status = rpcauth_unwrap_resp(task, decode, req, p, |
1699 | task->tk_msg.rpc_resp); | |
6d5fcb5a | 1700 | } |
46121cf7 CL |
1701 | dprintk("RPC: %5u call_decode result %d\n", task->tk_pid, |
1702 | task->tk_status); | |
1da177e4 LT |
1703 | return; |
1704 | out_retry: | |
1da177e4 | 1705 | task->tk_status = 0; |
b0e1c57e | 1706 | /* Note: rpc_verify_header() may have freed the RPC slot */ |
24b74bf0 | 1707 | if (task->tk_rqstp == req) { |
dd2b63d0 | 1708 | req->rq_reply_bytes_recvd = req->rq_rcv_buf.len = 0; |
24b74bf0 | 1709 | if (task->tk_client->cl_discrtry) |
7c1d71cf TM |
1710 | xprt_conditional_disconnect(task->tk_xprt, |
1711 | req->rq_connect_cookie); | |
24b74bf0 | 1712 | } |
1da177e4 LT |
1713 | } |
1714 | ||
d8ed029d | 1715 | static __be32 * |
b0e1c57e | 1716 | rpc_encode_header(struct rpc_task *task) |
1da177e4 LT |
1717 | { |
1718 | struct rpc_clnt *clnt = task->tk_client; | |
1da177e4 | 1719 | struct rpc_rqst *req = task->tk_rqstp; |
d8ed029d | 1720 | __be32 *p = req->rq_svec[0].iov_base; |
1da177e4 LT |
1721 | |
1722 | /* FIXME: check buffer size? */ | |
808012fb CL |
1723 | |
1724 | p = xprt_skip_transport_header(task->tk_xprt, p); | |
1da177e4 LT |
1725 | *p++ = req->rq_xid; /* XID */ |
1726 | *p++ = htonl(RPC_CALL); /* CALL */ | |
1727 | *p++ = htonl(RPC_VERSION); /* RPC version */ | |
1728 | *p++ = htonl(clnt->cl_prog); /* program number */ | |
1729 | *p++ = htonl(clnt->cl_vers); /* program version */ | |
1730 | *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */ | |
334ccfd5 TM |
1731 | p = rpcauth_marshcred(task, p); |
1732 | req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p); | |
1733 | return p; | |
1da177e4 LT |
1734 | } |
1735 | ||
d8ed029d | 1736 | static __be32 * |
b0e1c57e | 1737 | rpc_verify_header(struct rpc_task *task) |
1da177e4 LT |
1738 | { |
1739 | struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0]; | |
1740 | int len = task->tk_rqstp->rq_rcv_buf.len >> 2; | |
d8ed029d AD |
1741 | __be32 *p = iov->iov_base; |
1742 | u32 n; | |
1da177e4 LT |
1743 | int error = -EACCES; |
1744 | ||
e8896495 DH |
1745 | if ((task->tk_rqstp->rq_rcv_buf.len & 3) != 0) { |
1746 | /* RFC-1014 says that the representation of XDR data must be a | |
1747 | * multiple of four bytes | |
1748 | * - if it isn't pointer subtraction in the NFS client may give | |
1749 | * undefined results | |
1750 | */ | |
8a702bbb | 1751 | dprintk("RPC: %5u %s: XDR representation not a multiple of" |
0dc47877 | 1752 | " 4 bytes: 0x%x\n", task->tk_pid, __func__, |
8a702bbb | 1753 | task->tk_rqstp->rq_rcv_buf.len); |
e8896495 DH |
1754 | goto out_eio; |
1755 | } | |
1da177e4 LT |
1756 | if ((len -= 3) < 0) |
1757 | goto out_overflow; | |
1da177e4 | 1758 | |
f4a2e418 | 1759 | p += 1; /* skip XID */ |
1da177e4 | 1760 | if ((n = ntohl(*p++)) != RPC_REPLY) { |
8a702bbb | 1761 | dprintk("RPC: %5u %s: not an RPC reply: %x\n", |
f4a2e418 | 1762 | task->tk_pid, __func__, n); |
abbcf28f | 1763 | goto out_garbage; |
1da177e4 | 1764 | } |
f4a2e418 | 1765 | |
1da177e4 LT |
1766 | if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) { |
1767 | if (--len < 0) | |
1768 | goto out_overflow; | |
1769 | switch ((n = ntohl(*p++))) { | |
89f0e4fe JP |
1770 | case RPC_AUTH_ERROR: |
1771 | break; | |
1772 | case RPC_MISMATCH: | |
1773 | dprintk("RPC: %5u %s: RPC call version mismatch!\n", | |
1774 | task->tk_pid, __func__); | |
1775 | error = -EPROTONOSUPPORT; | |
1776 | goto out_err; | |
1777 | default: | |
1778 | dprintk("RPC: %5u %s: RPC call rejected, " | |
1779 | "unknown error: %x\n", | |
1780 | task->tk_pid, __func__, n); | |
1781 | goto out_eio; | |
1da177e4 LT |
1782 | } |
1783 | if (--len < 0) | |
1784 | goto out_overflow; | |
1785 | switch ((n = ntohl(*p++))) { | |
1786 | case RPC_AUTH_REJECTEDCRED: | |
1787 | case RPC_AUTH_REJECTEDVERF: | |
1788 | case RPCSEC_GSS_CREDPROBLEM: | |
1789 | case RPCSEC_GSS_CTXPROBLEM: | |
1790 | if (!task->tk_cred_retry) | |
1791 | break; | |
1792 | task->tk_cred_retry--; | |
46121cf7 | 1793 | dprintk("RPC: %5u %s: retry stale creds\n", |
0dc47877 | 1794 | task->tk_pid, __func__); |
1da177e4 | 1795 | rpcauth_invalcred(task); |
220bcc2a TM |
1796 | /* Ensure we obtain a new XID! */ |
1797 | xprt_release(task); | |
118df3d1 | 1798 | task->tk_action = call_reserve; |
abbcf28f | 1799 | goto out_retry; |
1da177e4 LT |
1800 | case RPC_AUTH_BADCRED: |
1801 | case RPC_AUTH_BADVERF: | |
1802 | /* possibly garbled cred/verf? */ | |
1803 | if (!task->tk_garb_retry) | |
1804 | break; | |
1805 | task->tk_garb_retry--; | |
46121cf7 | 1806 | dprintk("RPC: %5u %s: retry garbled creds\n", |
0dc47877 | 1807 | task->tk_pid, __func__); |
1da177e4 | 1808 | task->tk_action = call_bind; |
abbcf28f | 1809 | goto out_retry; |
1da177e4 | 1810 | case RPC_AUTH_TOOWEAK: |
b0e1c57e | 1811 | printk(KERN_NOTICE "RPC: server %s requires stronger " |
1356b8c2 | 1812 | "authentication.\n", task->tk_client->cl_server); |
1da177e4 LT |
1813 | break; |
1814 | default: | |
8a702bbb | 1815 | dprintk("RPC: %5u %s: unknown auth error: %x\n", |
0dc47877 | 1816 | task->tk_pid, __func__, n); |
1da177e4 LT |
1817 | error = -EIO; |
1818 | } | |
46121cf7 | 1819 | dprintk("RPC: %5u %s: call rejected %d\n", |
0dc47877 | 1820 | task->tk_pid, __func__, n); |
1da177e4 LT |
1821 | goto out_err; |
1822 | } | |
1823 | if (!(p = rpcauth_checkverf(task, p))) { | |
8a702bbb | 1824 | dprintk("RPC: %5u %s: auth check failed\n", |
0dc47877 | 1825 | task->tk_pid, __func__); |
abbcf28f | 1826 | goto out_garbage; /* bad verifier, retry */ |
1da177e4 | 1827 | } |
d8ed029d | 1828 | len = p - (__be32 *)iov->iov_base - 1; |
1da177e4 LT |
1829 | if (len < 0) |
1830 | goto out_overflow; | |
1831 | switch ((n = ntohl(*p++))) { | |
1832 | case RPC_SUCCESS: | |
1833 | return p; | |
1834 | case RPC_PROG_UNAVAIL: | |
46121cf7 | 1835 | dprintk("RPC: %5u %s: program %u is unsupported by server %s\n", |
0dc47877 | 1836 | task->tk_pid, __func__, |
1da177e4 LT |
1837 | (unsigned int)task->tk_client->cl_prog, |
1838 | task->tk_client->cl_server); | |
cdf47706 AG |
1839 | error = -EPFNOSUPPORT; |
1840 | goto out_err; | |
1da177e4 | 1841 | case RPC_PROG_MISMATCH: |
46121cf7 | 1842 | dprintk("RPC: %5u %s: program %u, version %u unsupported by " |
0dc47877 | 1843 | "server %s\n", task->tk_pid, __func__, |
1da177e4 LT |
1844 | (unsigned int)task->tk_client->cl_prog, |
1845 | (unsigned int)task->tk_client->cl_vers, | |
1846 | task->tk_client->cl_server); | |
cdf47706 AG |
1847 | error = -EPROTONOSUPPORT; |
1848 | goto out_err; | |
1da177e4 | 1849 | case RPC_PROC_UNAVAIL: |
3748f1e4 | 1850 | dprintk("RPC: %5u %s: proc %s unsupported by program %u, " |
46121cf7 | 1851 | "version %u on server %s\n", |
0dc47877 | 1852 | task->tk_pid, __func__, |
3748f1e4 | 1853 | rpc_proc_name(task), |
1da177e4 LT |
1854 | task->tk_client->cl_prog, |
1855 | task->tk_client->cl_vers, | |
1856 | task->tk_client->cl_server); | |
cdf47706 AG |
1857 | error = -EOPNOTSUPP; |
1858 | goto out_err; | |
1da177e4 | 1859 | case RPC_GARBAGE_ARGS: |
46121cf7 | 1860 | dprintk("RPC: %5u %s: server saw garbage\n", |
0dc47877 | 1861 | task->tk_pid, __func__); |
1da177e4 LT |
1862 | break; /* retry */ |
1863 | default: | |
8a702bbb | 1864 | dprintk("RPC: %5u %s: server accept status: %x\n", |
0dc47877 | 1865 | task->tk_pid, __func__, n); |
1da177e4 LT |
1866 | /* Also retry */ |
1867 | } | |
1868 | ||
abbcf28f | 1869 | out_garbage: |
1da177e4 LT |
1870 | task->tk_client->cl_stats->rpcgarbage++; |
1871 | if (task->tk_garb_retry) { | |
1872 | task->tk_garb_retry--; | |
46121cf7 | 1873 | dprintk("RPC: %5u %s: retrying\n", |
0dc47877 | 1874 | task->tk_pid, __func__); |
1da177e4 | 1875 | task->tk_action = call_bind; |
abbcf28f TM |
1876 | out_retry: |
1877 | return ERR_PTR(-EAGAIN); | |
1da177e4 | 1878 | } |
1da177e4 LT |
1879 | out_eio: |
1880 | error = -EIO; | |
1881 | out_err: | |
1882 | rpc_exit(task, error); | |
8a702bbb | 1883 | dprintk("RPC: %5u %s: call failed with error %d\n", task->tk_pid, |
0dc47877 | 1884 | __func__, error); |
abbcf28f | 1885 | return ERR_PTR(error); |
1da177e4 | 1886 | out_overflow: |
8a702bbb | 1887 | dprintk("RPC: %5u %s: server reply was truncated.\n", task->tk_pid, |
0dc47877 | 1888 | __func__); |
abbcf28f | 1889 | goto out_garbage; |
1da177e4 | 1890 | } |
5ee0ed7d | 1891 | |
9f06c719 | 1892 | static void rpcproc_encode_null(void *rqstp, struct xdr_stream *xdr, void *obj) |
5ee0ed7d | 1893 | { |
5ee0ed7d TM |
1894 | } |
1895 | ||
bf269551 | 1896 | static int rpcproc_decode_null(void *rqstp, struct xdr_stream *xdr, void *obj) |
5ee0ed7d TM |
1897 | { |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | static struct rpc_procinfo rpcproc_null = { | |
1902 | .p_encode = rpcproc_encode_null, | |
1903 | .p_decode = rpcproc_decode_null, | |
1904 | }; | |
1905 | ||
caabea8a | 1906 | static int rpc_ping(struct rpc_clnt *clnt) |
5ee0ed7d TM |
1907 | { |
1908 | struct rpc_message msg = { | |
1909 | .rpc_proc = &rpcproc_null, | |
1910 | }; | |
1911 | int err; | |
1912 | msg.rpc_cred = authnull_ops.lookup_cred(NULL, NULL, 0); | |
caabea8a | 1913 | err = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN); |
5ee0ed7d TM |
1914 | put_rpccred(msg.rpc_cred); |
1915 | return err; | |
1916 | } | |
188fef11 | 1917 | |
5e1550d6 TM |
1918 | struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags) |
1919 | { | |
1920 | struct rpc_message msg = { | |
1921 | .rpc_proc = &rpcproc_null, | |
1922 | .rpc_cred = cred, | |
1923 | }; | |
84115e1c TM |
1924 | struct rpc_task_setup task_setup_data = { |
1925 | .rpc_client = clnt, | |
1926 | .rpc_message = &msg, | |
1927 | .callback_ops = &rpc_default_ops, | |
1928 | .flags = flags, | |
1929 | }; | |
c970aa85 | 1930 | return rpc_run_task(&task_setup_data); |
5e1550d6 | 1931 | } |
e8914c65 | 1932 | EXPORT_SYMBOL_GPL(rpc_call_null); |
5e1550d6 | 1933 | |
188fef11 | 1934 | #ifdef RPC_DEBUG |
68a23ee9 CL |
1935 | static void rpc_show_header(void) |
1936 | { | |
cb3997b5 CL |
1937 | printk(KERN_INFO "-pid- flgs status -client- --rqstp- " |
1938 | "-timeout ---ops--\n"); | |
68a23ee9 CL |
1939 | } |
1940 | ||
38e886e0 CL |
1941 | static void rpc_show_task(const struct rpc_clnt *clnt, |
1942 | const struct rpc_task *task) | |
1943 | { | |
1944 | const char *rpc_waitq = "none"; | |
38e886e0 CL |
1945 | |
1946 | if (RPC_IS_QUEUED(task)) | |
1947 | rpc_waitq = rpc_qname(task->tk_waitqueue); | |
1948 | ||
b3bcedad | 1949 | printk(KERN_INFO "%5u %04x %6d %8p %8p %8ld %8p %sv%u %s a:%ps q:%s\n", |
cb3997b5 CL |
1950 | task->tk_pid, task->tk_flags, task->tk_status, |
1951 | clnt, task->tk_rqstp, task->tk_timeout, task->tk_ops, | |
1952 | clnt->cl_protname, clnt->cl_vers, rpc_proc_name(task), | |
b3bcedad | 1953 | task->tk_action, rpc_waitq); |
38e886e0 CL |
1954 | } |
1955 | ||
70abc49b | 1956 | void rpc_show_tasks(struct net *net) |
188fef11 TM |
1957 | { |
1958 | struct rpc_clnt *clnt; | |
38e886e0 | 1959 | struct rpc_task *task; |
68a23ee9 | 1960 | int header = 0; |
70abc49b | 1961 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
188fef11 | 1962 | |
70abc49b SK |
1963 | spin_lock(&sn->rpc_client_lock); |
1964 | list_for_each_entry(clnt, &sn->all_clients, cl_clients) { | |
188fef11 | 1965 | spin_lock(&clnt->cl_lock); |
38e886e0 | 1966 | list_for_each_entry(task, &clnt->cl_tasks, tk_task) { |
68a23ee9 CL |
1967 | if (!header) { |
1968 | rpc_show_header(); | |
1969 | header++; | |
1970 | } | |
38e886e0 | 1971 | rpc_show_task(clnt, task); |
188fef11 TM |
1972 | } |
1973 | spin_unlock(&clnt->cl_lock); | |
1974 | } | |
70abc49b | 1975 | spin_unlock(&sn->rpc_client_lock); |
188fef11 TM |
1976 | } |
1977 | #endif |