Commit | Line | Data |
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24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
d8efa4e6 | 23 | #include <linux/sunrpc/addr.h> |
24c8dbbb DH |
24 | #include <linux/sunrpc/clnt.h> |
25 | #include <linux/sunrpc/stats.h> | |
26 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 27 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 28 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
24c8dbbb DH |
35 | #include <linux/vfs.h> |
36 | #include <linux/inet.h> | |
3b0d3f93 | 37 | #include <linux/in6.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
40401530 | 39 | #include <linux/idr.h> |
3b0d3f93 | 40 | #include <net/ipv6.h> |
24c8dbbb | 41 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 42 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
43 | #include <linux/nsproxy.h> |
44 | #include <linux/pid_namespace.h> | |
24c8dbbb | 45 | |
24c8dbbb DH |
46 | |
47 | #include "nfs4_fs.h" | |
48 | #include "callback.h" | |
49 | #include "delegation.h" | |
50 | #include "iostat.h" | |
51 | #include "internal.h" | |
14727281 | 52 | #include "fscache.h" |
85e174ba | 53 | #include "pnfs.h" |
ab7017a3 | 54 | #include "nfs.h" |
6b13168b | 55 | #include "netns.h" |
24c8dbbb DH |
56 | |
57 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
58 | ||
24c8dbbb | 59 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
60 | static DEFINE_SPINLOCK(nfs_version_lock); |
61 | static DEFINE_MUTEX(nfs_version_mutex); | |
62 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 63 | |
5006a76c DH |
64 | /* |
65 | * RPC cruft for NFS | |
66 | */ | |
a613fa16 | 67 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
68 | [2] = NULL, |
69 | [3] = NULL, | |
70 | [4] = NULL, | |
5006a76c DH |
71 | }; |
72 | ||
a613fa16 | 73 | const struct rpc_program nfs_program = { |
5006a76c DH |
74 | .name = "nfs", |
75 | .number = NFS_PROGRAM, | |
76 | .nrvers = ARRAY_SIZE(nfs_version), | |
77 | .version = nfs_version, | |
78 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 79 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
80 | }; |
81 | ||
82 | struct rpc_stat nfs_rpcstat = { | |
83 | .program = &nfs_program | |
84 | }; | |
85 | ||
ab7017a3 BS |
86 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
87 | { | |
88 | struct nfs_subversion *nfs; | |
89 | spin_lock(&nfs_version_lock); | |
90 | ||
91 | list_for_each_entry(nfs, &nfs_versions, list) { | |
92 | if (nfs->rpc_ops->version == version) { | |
93 | spin_unlock(&nfs_version_lock); | |
94 | return nfs; | |
95 | } | |
ee34e136 | 96 | } |
ab7017a3 BS |
97 | |
98 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 99 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
100 | } |
101 | ||
102 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
103 | { | |
104 | struct nfs_subversion *nfs = find_nfs_version(version); | |
105 | ||
106 | if (IS_ERR(nfs)) { | |
107 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 108 | request_module("nfsv%d", version); |
ab7017a3 BS |
109 | nfs = find_nfs_version(version); |
110 | mutex_unlock(&nfs_version_mutex); | |
111 | } | |
112 | ||
1f70ef96 AK |
113 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
114 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
115 | return nfs; |
116 | } | |
117 | ||
118 | void put_nfs_version(struct nfs_subversion *nfs) | |
119 | { | |
120 | module_put(nfs->owner); | |
121 | } | |
122 | ||
123 | void register_nfs_version(struct nfs_subversion *nfs) | |
124 | { | |
125 | spin_lock(&nfs_version_lock); | |
126 | ||
127 | list_add(&nfs->list, &nfs_versions); | |
128 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
129 | ||
130 | spin_unlock(&nfs_version_lock); | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
133 | ||
134 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
135 | { | |
136 | spin_lock(&nfs_version_lock); | |
137 | ||
138 | nfs_version[nfs->rpc_ops->version] = NULL; | |
139 | list_del(&nfs->list); | |
140 | ||
141 | spin_unlock(&nfs_version_lock); | |
142 | } | |
143 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
144 | ||
24c8dbbb DH |
145 | /* |
146 | * Allocate a shared client record | |
147 | * | |
148 | * Since these are allocated/deallocated very rarely, we don't | |
149 | * bother putting them in a slab cache... | |
150 | */ | |
6663ee7f | 151 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
152 | { |
153 | struct nfs_client *clp; | |
7c67db3a | 154 | struct rpc_cred *cred; |
a21bdd9b | 155 | int err = -ENOMEM; |
24c8dbbb DH |
156 | |
157 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
158 | goto error_0; | |
159 | ||
ab7017a3 | 160 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
161 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
162 | goto error_dealloc; | |
ab7017a3 BS |
163 | |
164 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 165 | |
24c8dbbb DH |
166 | atomic_set(&clp->cl_count, 1); |
167 | clp->cl_cons_state = NFS_CS_INITING; | |
168 | ||
6e4cffd7 CL |
169 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
170 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 171 | |
3a498026 | 172 | if (cl_init->hostname) { |
a21bdd9b | 173 | err = -ENOMEM; |
3a498026 | 174 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 175 | if (!clp->cl_hostname) |
71468513 | 176 | goto error_cleanup; |
24c8dbbb DH |
177 | } |
178 | ||
179 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
180 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
181 | ||
59dca3b2 | 182 | clp->cl_proto = cl_init->proto; |
73ea666c | 183 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 184 | |
68c97153 | 185 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
186 | if (!IS_ERR(cred)) |
187 | clp->cl_machine_cred = cred; | |
14727281 DH |
188 | nfs_fscache_get_client_cookie(clp); |
189 | ||
24c8dbbb DH |
190 | return clp; |
191 | ||
71468513 | 192 | error_cleanup: |
ab7017a3 | 193 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 194 | error_dealloc: |
24c8dbbb DH |
195 | kfree(clp); |
196 | error_0: | |
a21bdd9b | 197 | return ERR_PTR(err); |
24c8dbbb | 198 | } |
ddda8e0a | 199 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 200 | |
89d77c8f | 201 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f | 202 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 203 | { |
28cd1b3f SK |
204 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
205 | ||
206 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
207 | } |
208 | ||
209 | /* nfs_client_lock held */ | |
210 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
211 | { | |
73ea666c | 212 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 213 | |
f4eecd5d | 214 | if (clp->cl_cb_ident) |
28cd1b3f | 215 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
216 | } |
217 | ||
f7e8917a FI |
218 | static void pnfs_init_server(struct nfs_server *server) |
219 | { | |
220 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
221 | } | |
222 | ||
888ef2e3 | 223 | #else |
28cd1b3f | 224 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
225 | { |
226 | } | |
227 | ||
228 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
229 | { | |
230 | } | |
f7e8917a FI |
231 | |
232 | static void pnfs_init_server(struct nfs_server *server) | |
233 | { | |
234 | } | |
235 | ||
888ef2e3 | 236 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 237 | |
24c8dbbb DH |
238 | /* |
239 | * Destroy a shared client record | |
240 | */ | |
cdb7eced | 241 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 242 | { |
40c55319 | 243 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 244 | |
14727281 DH |
245 | nfs_fscache_release_client_cookie(clp); |
246 | ||
24c8dbbb DH |
247 | /* -EIO all pending I/O */ |
248 | if (!IS_ERR(clp->cl_rpcclient)) | |
249 | rpc_shutdown_client(clp->cl_rpcclient); | |
250 | ||
7c67db3a TM |
251 | if (clp->cl_machine_cred != NULL) |
252 | put_rpccred(clp->cl_machine_cred); | |
253 | ||
73ea666c | 254 | put_net(clp->cl_net); |
ab7017a3 | 255 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 256 | kfree(clp->cl_hostname); |
f11b2a1c | 257 | kfree(clp->cl_acceptor); |
24c8dbbb DH |
258 | kfree(clp); |
259 | ||
260 | dprintk("<-- nfs_free_client()\n"); | |
261 | } | |
ddda8e0a | 262 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
263 | |
264 | /* | |
265 | * Release a reference to a shared client record | |
266 | */ | |
267 | void nfs_put_client(struct nfs_client *clp) | |
268 | { | |
dc030858 SK |
269 | struct nfs_net *nn; |
270 | ||
27ba8512 DH |
271 | if (!clp) |
272 | return; | |
273 | ||
24c8dbbb | 274 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 275 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 276 | |
dc030858 | 277 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 278 | list_del(&clp->cl_share_link); |
f4eecd5d | 279 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 280 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 281 | |
1fea73a8 | 282 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 283 | |
cdb7eced | 284 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
285 | } |
286 | } | |
16b374ca | 287 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 288 | |
24c8dbbb | 289 | /* |
c81468a1 TM |
290 | * Find an nfs_client on the list that matches the initialisation data |
291 | * that is supplied. | |
24c8dbbb | 292 | */ |
c81468a1 | 293 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
294 | { |
295 | struct nfs_client *clp; | |
d7371c41 | 296 | const struct sockaddr *sap = data->addr; |
6b13168b | 297 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 298 | |
6b13168b | 299 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 300 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
301 | /* Don't match clients that failed to initialise properly */ |
302 | if (clp->cl_cons_state < 0) | |
303 | continue; | |
304 | ||
305 | /* Different NFS versions cannot share the same nfs_client */ | |
ab7017a3 | 306 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
307 | continue; |
308 | ||
59dca3b2 TM |
309 | if (clp->cl_proto != data->proto) |
310 | continue; | |
5aae4a9a BH |
311 | /* Match nfsv4 minorversion */ |
312 | if (clp->cl_minorversion != data->minorversion) | |
313 | continue; | |
c81468a1 | 314 | /* Match the full socket address */ |
d8efa4e6 | 315 | if (!rpc_cmp_addr_port(sap, clap)) |
c81468a1 TM |
316 | continue; |
317 | ||
318 | atomic_inc(&clp->cl_count); | |
319 | return clp; | |
13bbc06a | 320 | } |
c81468a1 | 321 | return NULL; |
24c8dbbb DH |
322 | } |
323 | ||
4697bd5e TM |
324 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
325 | { | |
48d66b97 | 326 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e TM |
327 | } |
328 | ||
329 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
330 | { | |
331 | return wait_event_killable(nfs_client_active_wq, | |
332 | nfs_client_init_is_complete(clp)); | |
333 | } | |
89d77c8f | 334 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 335 | |
f411703a CL |
336 | /* |
337 | * Found an existing client. Make sure it's ready before returning. | |
338 | */ | |
339 | static struct nfs_client * | |
340 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
341 | struct nfs_client *clp) | |
342 | { | |
343 | int error; | |
344 | ||
4697bd5e | 345 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
346 | if (error < 0) { |
347 | nfs_put_client(clp); | |
348 | return ERR_PTR(-ERESTARTSYS); | |
349 | } | |
350 | ||
351 | if (clp->cl_cons_state < NFS_CS_READY) { | |
352 | error = clp->cl_cons_state; | |
353 | nfs_put_client(clp); | |
354 | return ERR_PTR(error); | |
355 | } | |
356 | ||
54ac471c TM |
357 | smp_rmb(); |
358 | ||
f411703a CL |
359 | dprintk("<-- %s found nfs_client %p for %s\n", |
360 | __func__, clp, cl_init->hostname ?: ""); | |
361 | return clp; | |
362 | } | |
363 | ||
24c8dbbb DH |
364 | /* |
365 | * Look up a client by IP address and protocol version | |
366 | * - creates a new record if one doesn't yet exist | |
367 | */ | |
fcf10398 | 368 | struct nfs_client * |
45a52a02 AA |
369 | nfs_get_client(const struct nfs_client_initdata *cl_init, |
370 | const struct rpc_timeout *timeparms, | |
371 | const char *ip_addr, | |
4bf590e0 | 372 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
373 | { |
374 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 375 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 376 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 377 | |
31434f49 PT |
378 | if (cl_init->hostname == NULL) { |
379 | WARN_ON(1); | |
380 | return NULL; | |
381 | } | |
382 | ||
d7422c47 | 383 | dprintk("--> nfs_get_client(%s,v%u)\n", |
31434f49 | 384 | cl_init->hostname, rpc_ops->version); |
24c8dbbb DH |
385 | |
386 | /* see if the client already exists */ | |
387 | do { | |
dc030858 | 388 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 389 | |
c81468a1 | 390 | clp = nfs_match_client(cl_init); |
f411703a CL |
391 | if (clp) { |
392 | spin_unlock(&nn->nfs_client_lock); | |
393 | if (new) | |
cdb7eced | 394 | new->rpc_ops->free_client(new); |
f411703a CL |
395 | return nfs_found_client(cl_init, clp); |
396 | } | |
8cab4c39 | 397 | if (new) { |
05f4c350 CL |
398 | list_add_tail(&new->cl_share_link, |
399 | &nn->nfs_client_list); | |
8cab4c39 | 400 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 401 | new->cl_flags = cl_init->init_flags; |
f8407299 | 402 | return rpc_ops->init_client(new, timeparms, ip_addr); |
8cab4c39 | 403 | } |
24c8dbbb | 404 | |
dc030858 | 405 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 406 | |
ab7017a3 | 407 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 408 | } while (!IS_ERR(new)); |
24c8dbbb | 409 | |
f411703a | 410 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
31434f49 | 411 | cl_init->hostname, PTR_ERR(new)); |
a21bdd9b | 412 | return new; |
24c8dbbb | 413 | } |
89d77c8f | 414 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
415 | |
416 | /* | |
417 | * Mark a server as ready or failed | |
418 | */ | |
76db6d95 | 419 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 420 | { |
54ac471c | 421 | smp_wmb(); |
24c8dbbb DH |
422 | clp->cl_cons_state = state; |
423 | wake_up_all(&nfs_client_active_wq); | |
424 | } | |
89d77c8f | 425 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
426 | |
427 | /* | |
428 | * Initialise the timeout values for a connection | |
429 | */ | |
fcf10398 | 430 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
5006a76c DH |
431 | unsigned int timeo, unsigned int retrans) |
432 | { | |
433 | to->to_initval = timeo * HZ / 10; | |
434 | to->to_retries = retrans; | |
5006a76c DH |
435 | |
436 | switch (proto) { | |
0896a725 | 437 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 438 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
439 | if (to->to_retries == 0) |
440 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 441 | if (to->to_initval == 0) |
259875ef | 442 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
443 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
444 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
445 | to->to_increment = to->to_initval; | |
446 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
447 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
448 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
449 | if (to->to_maxval < to->to_initval) | |
450 | to->to_maxval = to->to_initval; | |
5006a76c DH |
451 | to->to_exponential = 0; |
452 | break; | |
0896a725 | 453 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
454 | if (to->to_retries == 0) |
455 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 456 | if (!to->to_initval) |
259875ef | 457 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
458 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
459 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
460 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
461 | to->to_exponential = 1; | |
462 | break; | |
259875ef TM |
463 | default: |
464 | BUG(); | |
5006a76c DH |
465 | } |
466 | } | |
89d77c8f | 467 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
468 | |
469 | /* | |
470 | * Create an RPC client handle | |
471 | */ | |
428360d7 BS |
472 | int nfs_create_rpc_client(struct nfs_client *clp, |
473 | const struct rpc_timeout *timeparms, | |
474 | rpc_authflavor_t flavor) | |
5006a76c | 475 | { |
5006a76c | 476 | struct rpc_clnt *clnt = NULL; |
41877d20 | 477 | struct rpc_create_args args = { |
73ea666c | 478 | .net = clp->cl_net, |
59dca3b2 | 479 | .protocol = clp->cl_proto, |
41877d20 | 480 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 481 | .addrsize = clp->cl_addrlen, |
33170233 | 482 | .timeout = timeparms, |
41877d20 CL |
483 | .servername = clp->cl_hostname, |
484 | .program = &nfs_program, | |
485 | .version = clp->rpc_ops->version, | |
486 | .authflavor = flavor, | |
487 | }; | |
5006a76c | 488 | |
4bf590e0 | 489 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 490 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
491 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
492 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 493 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 494 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
495 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
496 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4a01b8a4 | 497 | |
5006a76c DH |
498 | if (!IS_ERR(clp->cl_rpcclient)) |
499 | return 0; | |
500 | ||
41877d20 | 501 | clnt = rpc_create(&args); |
5006a76c DH |
502 | if (IS_ERR(clnt)) { |
503 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 504 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
505 | return PTR_ERR(clnt); |
506 | } | |
507 | ||
5006a76c DH |
508 | clp->cl_rpcclient = clnt; |
509 | return 0; | |
510 | } | |
89d77c8f | 511 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
512 | |
513 | /* | |
514 | * Version 2 or 3 client destruction | |
515 | */ | |
516 | static void nfs_destroy_server(struct nfs_server *server) | |
517 | { | |
f259613a | 518 | if (server->nlm_host) |
9289e7f9 | 519 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
520 | } |
521 | ||
522 | /* | |
523 | * Version 2 or 3 lockd setup | |
524 | */ | |
525 | static int nfs_start_lockd(struct nfs_server *server) | |
526 | { | |
9289e7f9 CL |
527 | struct nlm_host *host; |
528 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
529 | struct nlmclnt_initdata nlm_init = { |
530 | .hostname = clp->cl_hostname, | |
531 | .address = (struct sockaddr *)&clp->cl_addr, | |
532 | .addrlen = clp->cl_addrlen, | |
883bb163 | 533 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
534 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
535 | 1 : 0, | |
73ea666c | 536 | .net = clp->cl_net, |
883bb163 | 537 | }; |
54ceac45 | 538 | |
883bb163 | 539 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 540 | return 0; |
5eebde23 SJ |
541 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
542 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
543 | return 0; |
544 | ||
8a6e5deb TM |
545 | switch (clp->cl_proto) { |
546 | default: | |
547 | nlm_init.protocol = IPPROTO_TCP; | |
548 | break; | |
549 | case XPRT_TRANSPORT_UDP: | |
550 | nlm_init.protocol = IPPROTO_UDP; | |
551 | } | |
552 | ||
883bb163 | 553 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
554 | if (IS_ERR(host)) |
555 | return PTR_ERR(host); | |
556 | ||
557 | server->nlm_host = host; | |
558 | server->destroy = nfs_destroy_server; | |
559 | return 0; | |
54ceac45 DH |
560 | } |
561 | ||
54ceac45 DH |
562 | /* |
563 | * Create a general RPC client | |
564 | */ | |
fcf10398 | 565 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
566 | const struct rpc_timeout *timeo, |
567 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
568 | { |
569 | struct nfs_client *clp = server->nfs_client; | |
570 | ||
ba9b584c CL |
571 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
572 | pseudoflavour); | |
54ceac45 | 573 | if (IS_ERR(server->client)) { |
3110ff80 | 574 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
575 | return PTR_ERR(server->client); |
576 | } | |
577 | ||
33170233 TM |
578 | memcpy(&server->client->cl_timeout_default, |
579 | timeo, | |
580 | sizeof(server->client->cl_timeout_default)); | |
581 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 DH |
582 | server->client->cl_softrtry = 0; |
583 | if (server->flags & NFS_MOUNT_SOFT) | |
584 | server->client->cl_softrtry = 1; | |
585 | ||
54ceac45 DH |
586 | return 0; |
587 | } | |
89d77c8f | 588 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 589 | |
8cab4c39 CL |
590 | /** |
591 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
592 | * | |
593 | * @clp: nfs_client to initialise | |
594 | * @timeparms: timeout parameters for underlying RPC transport | |
595 | * @ip_addr: IP presentation address (not used) | |
8cab4c39 CL |
596 | * |
597 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 598 | */ |
8cab4c39 CL |
599 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
600 | const struct rpc_timeout *timeparms, | |
f8407299 | 601 | const char *ip_addr) |
54ceac45 | 602 | { |
54ceac45 DH |
603 | int error; |
604 | ||
605 | if (clp->cl_cons_state == NFS_CS_READY) { | |
606 | /* the client is already initialised */ | |
607 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 608 | return clp; |
54ceac45 DH |
609 | } |
610 | ||
54ceac45 DH |
611 | /* |
612 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
613 | * - RFC 2623, sec 2.3.2 | |
614 | */ | |
4bf590e0 | 615 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
616 | if (error < 0) |
617 | goto error; | |
618 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 619 | return clp; |
54ceac45 DH |
620 | |
621 | error: | |
622 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 623 | nfs_put_client(clp); |
54ceac45 | 624 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 625 | return ERR_PTR(error); |
54ceac45 | 626 | } |
ddda8e0a | 627 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
628 | |
629 | /* | |
630 | * Create a version 2 or 3 client | |
631 | */ | |
2283f8d6 | 632 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
633 | const struct nfs_parsed_mount_data *data, |
634 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 635 | { |
3a498026 TM |
636 | struct nfs_client_initdata cl_init = { |
637 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 638 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 639 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 640 | .nfs_mod = nfs_mod, |
59dca3b2 | 641 | .proto = data->nfs_server.protocol, |
e50a7a1a | 642 | .net = data->net, |
3a498026 | 643 | }; |
33170233 | 644 | struct rpc_timeout timeparms; |
54ceac45 | 645 | struct nfs_client *clp; |
3a498026 | 646 | int error; |
54ceac45 DH |
647 | |
648 | dprintk("--> nfs_init_server()\n"); | |
649 | ||
45a52a02 AA |
650 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
651 | data->timeo, data->retrans); | |
4bf590e0 CL |
652 | if (data->flags & NFS_MOUNT_NORESVPORT) |
653 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 654 | |
54ceac45 | 655 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 656 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
657 | if (IS_ERR(clp)) { |
658 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
659 | return PTR_ERR(clp); | |
660 | } | |
661 | ||
54ceac45 DH |
662 | server->nfs_client = clp; |
663 | ||
664 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 665 | server->flags = data->flags; |
b797cac7 | 666 | server->options = data->options; |
62ab460c TM |
667 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
668 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
cd812599 | 669 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; |
54ceac45 DH |
670 | |
671 | if (data->rsize) | |
672 | server->rsize = nfs_block_size(data->rsize, NULL); | |
673 | if (data->wsize) | |
674 | server->wsize = nfs_block_size(data->wsize, NULL); | |
675 | ||
676 | server->acregmin = data->acregmin * HZ; | |
677 | server->acregmax = data->acregmax * HZ; | |
678 | server->acdirmin = data->acdirmin * HZ; | |
679 | server->acdirmax = data->acdirmax * HZ; | |
680 | ||
681 | /* Start lockd here, before we might error out */ | |
682 | error = nfs_start_lockd(server); | |
683 | if (error < 0) | |
684 | goto error; | |
685 | ||
f22d6d79 | 686 | server->port = data->nfs_server.port; |
0f5f49b8 | 687 | server->auth_info = data->auth_info; |
f22d6d79 | 688 | |
a3f73c27 WAA |
689 | error = nfs_init_server_rpcclient(server, &timeparms, |
690 | data->selected_flavor); | |
54ceac45 DH |
691 | if (error < 0) |
692 | goto error; | |
693 | ||
3f8400d1 CL |
694 | /* Preserve the values of mount_server-related mount options */ |
695 | if (data->mount_server.addrlen) { | |
696 | memcpy(&server->mountd_address, &data->mount_server.address, | |
697 | data->mount_server.addrlen); | |
698 | server->mountd_addrlen = data->mount_server.addrlen; | |
699 | } | |
700 | server->mountd_version = data->mount_server.version; | |
701 | server->mountd_port = data->mount_server.port; | |
702 | server->mountd_protocol = data->mount_server.protocol; | |
703 | ||
54ceac45 | 704 | server->namelen = data->namlen; |
54ceac45 DH |
705 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
706 | return 0; | |
707 | ||
708 | error: | |
709 | server->nfs_client = NULL; | |
710 | nfs_put_client(clp); | |
711 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
712 | return error; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Load up the server record from information gained in an fsinfo record | |
717 | */ | |
738fd0f3 | 718 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 719 | struct nfs_fsinfo *fsinfo) |
54ceac45 DH |
720 | { |
721 | unsigned long max_rpc_payload; | |
722 | ||
723 | /* Work out a lot of parameters */ | |
724 | if (server->rsize == 0) | |
725 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
726 | if (server->wsize == 0) | |
727 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
728 | ||
729 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
730 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
731 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
732 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
733 | ||
734 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
735 | if (server->rsize > max_rpc_payload) | |
736 | server->rsize = max_rpc_payload; | |
737 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
738 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 739 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 740 | |
d993831f | 741 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
742 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
743 | ||
744 | if (server->wsize > max_rpc_payload) | |
745 | server->wsize = max_rpc_payload; | |
746 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
747 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 748 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 749 | |
54ceac45 DH |
750 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
751 | ||
752 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
09cbfeaf KS |
753 | if (server->dtsize > PAGE_SIZE * NFS_MAX_READDIR_PAGES) |
754 | server->dtsize = PAGE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
755 | if (server->dtsize > server->rsize) |
756 | server->dtsize = server->rsize; | |
757 | ||
758 | if (server->flags & NFS_MOUNT_NOAC) { | |
759 | server->acregmin = server->acregmax = 0; | |
760 | server->acdirmin = server->acdirmax = 0; | |
761 | } | |
762 | ||
763 | server->maxfilesize = fsinfo->maxfilesize; | |
764 | ||
6b96724e RL |
765 | server->time_delta = fsinfo->time_delta; |
766 | ||
2a92ee92 | 767 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
768 | /* We're airborne Set socket buffersize */ |
769 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
770 | } | |
771 | ||
772 | /* | |
773 | * Probe filesystem information, including the FSID on v2/v3 | |
774 | */ | |
fcf10398 | 775 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
776 | { |
777 | struct nfs_fsinfo fsinfo; | |
778 | struct nfs_client *clp = server->nfs_client; | |
779 | int error; | |
780 | ||
781 | dprintk("--> nfs_probe_fsinfo()\n"); | |
782 | ||
783 | if (clp->rpc_ops->set_capabilities != NULL) { | |
784 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
785 | if (error < 0) | |
786 | goto out_error; | |
787 | } | |
788 | ||
789 | fsinfo.fattr = fattr; | |
85e174ba | 790 | fsinfo.layouttype = 0; |
54ceac45 DH |
791 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
792 | if (error < 0) | |
793 | goto out_error; | |
794 | ||
71f81e51 | 795 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
796 | |
797 | /* Get some general file system info */ | |
798 | if (server->namelen == 0) { | |
799 | struct nfs_pathconf pathinfo; | |
800 | ||
801 | pathinfo.fattr = fattr; | |
802 | nfs_fattr_init(fattr); | |
803 | ||
804 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
805 | server->namelen = pathinfo.max_namelen; | |
806 | } | |
807 | ||
808 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
809 | return 0; | |
810 | ||
811 | out_error: | |
812 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
813 | return error; | |
814 | } | |
89d77c8f | 815 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
816 | |
817 | /* | |
818 | * Copy useful information when duplicating a server record | |
819 | */ | |
fcf10398 | 820 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
821 | { |
822 | target->flags = source->flags; | |
356e76b8 CL |
823 | target->rsize = source->rsize; |
824 | target->wsize = source->wsize; | |
54ceac45 DH |
825 | target->acregmin = source->acregmin; |
826 | target->acregmax = source->acregmax; | |
827 | target->acdirmin = source->acdirmin; | |
828 | target->acdirmax = source->acdirmax; | |
829 | target->caps = source->caps; | |
2df54806 | 830 | target->options = source->options; |
0f5f49b8 | 831 | target->auth_info = source->auth_info; |
54ceac45 | 832 | } |
89d77c8f | 833 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 834 | |
fcf10398 | 835 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
836 | { |
837 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 838 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 839 | |
dc030858 | 840 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 841 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 842 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 843 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 844 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
845 | |
846 | } | |
89d77c8f | 847 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 848 | |
32e62b7c | 849 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 850 | { |
d3b4c9d7 | 851 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 852 | struct nfs_net *nn; |
d3b4c9d7 | 853 | |
4c03ae4a TM |
854 | if (clp == NULL) |
855 | return; | |
73ea666c | 856 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 857 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 858 | list_del_rcu(&server->client_link); |
4c03ae4a | 859 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 860 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 861 | list_del(&server->master_link); |
dc030858 | 862 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
863 | |
864 | synchronize_rcu(); | |
865 | } | |
32e62b7c | 866 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 867 | |
54ceac45 DH |
868 | /* |
869 | * Allocate and initialise a server record | |
870 | */ | |
fcf10398 | 871 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
872 | { |
873 | struct nfs_server *server; | |
874 | ||
875 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
876 | if (!server) | |
877 | return NULL; | |
878 | ||
879 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
880 | ||
881 | /* Zero out the NFS state stuff */ | |
882 | INIT_LIST_HEAD(&server->client_link); | |
883 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 884 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 885 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 886 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 887 | |
ef818a28 SD |
888 | atomic_set(&server->active, 0); |
889 | ||
54ceac45 DH |
890 | server->io_stats = nfs_alloc_iostats(); |
891 | if (!server->io_stats) { | |
892 | kfree(server); | |
893 | return NULL; | |
894 | } | |
895 | ||
48d07649 JA |
896 | if (bdi_init(&server->backing_dev_info)) { |
897 | nfs_free_iostats(server->io_stats); | |
898 | kfree(server); | |
899 | return NULL; | |
900 | } | |
901 | ||
9157c31d | 902 | ida_init(&server->openowner_id); |
d2d7ce28 | 903 | ida_init(&server->lockowner_id); |
f7e8917a FI |
904 | pnfs_init_server(server); |
905 | ||
54ceac45 DH |
906 | return server; |
907 | } | |
89d77c8f | 908 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
909 | |
910 | /* | |
911 | * Free up a server record | |
912 | */ | |
913 | void nfs_free_server(struct nfs_server *server) | |
914 | { | |
915 | dprintk("--> nfs_free_server()\n"); | |
916 | ||
fca5238e | 917 | nfs_server_remove_lists(server); |
54ceac45 DH |
918 | |
919 | if (server->destroy != NULL) | |
920 | server->destroy(server); | |
5cef338b TM |
921 | |
922 | if (!IS_ERR(server->client_acl)) | |
923 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
924 | if (!IS_ERR(server->client)) |
925 | rpc_shutdown_client(server->client); | |
926 | ||
927 | nfs_put_client(server->nfs_client); | |
928 | ||
d2d7ce28 | 929 | ida_destroy(&server->lockowner_id); |
9157c31d | 930 | ida_destroy(&server->openowner_id); |
54ceac45 | 931 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 932 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
933 | kfree(server); |
934 | nfs_release_automount_timer(); | |
935 | dprintk("<-- nfs_free_server()\n"); | |
936 | } | |
89d77c8f | 937 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
938 | |
939 | /* | |
940 | * Create a version 2 or 3 volume record | |
941 | * - keyed on server and FSID | |
942 | */ | |
1179acc6 | 943 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 944 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
945 | { |
946 | struct nfs_server *server; | |
fbca779a | 947 | struct nfs_fattr *fattr; |
54ceac45 DH |
948 | int error; |
949 | ||
950 | server = nfs_alloc_server(); | |
951 | if (!server) | |
952 | return ERR_PTR(-ENOMEM); | |
953 | ||
fbca779a TM |
954 | error = -ENOMEM; |
955 | fattr = nfs_alloc_fattr(); | |
956 | if (fattr == NULL) | |
957 | goto error; | |
958 | ||
54ceac45 | 959 | /* Get a client representation */ |
1179acc6 | 960 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
961 | if (error < 0) |
962 | goto error; | |
963 | ||
54ceac45 | 964 | /* Probe the root fh to retrieve its FSID */ |
1179acc6 | 965 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
966 | if (error < 0) |
967 | goto error; | |
54af3bb5 TM |
968 | if (server->nfs_client->rpc_ops->version == 3) { |
969 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
970 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 971 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
972 | server->caps |= NFS_CAP_READDIRPLUS; |
973 | } else { | |
974 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
975 | server->namelen = NFS2_MAXNAMLEN; | |
976 | } | |
977 | ||
fbca779a | 978 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1775fd3e | 979 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL); |
54ceac45 DH |
980 | if (error < 0) { |
981 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
982 | goto error; | |
983 | } | |
984 | } | |
fbca779a | 985 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 986 | |
6daabf1b DH |
987 | dprintk("Server FSID: %llx:%llx\n", |
988 | (unsigned long long) server->fsid.major, | |
989 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 990 | |
fca5238e | 991 | nfs_server_insert_lists(server); |
54ceac45 | 992 | server->mount_time = jiffies; |
fbca779a | 993 | nfs_free_fattr(fattr); |
54ceac45 DH |
994 | return server; |
995 | ||
996 | error: | |
fbca779a | 997 | nfs_free_fattr(fattr); |
54ceac45 DH |
998 | nfs_free_server(server); |
999 | return ERR_PTR(error); | |
1000 | } | |
ddda8e0a | 1001 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1002 | |
54ceac45 DH |
1003 | /* |
1004 | * Clone an NFS2, NFS3 or NFS4 server record | |
1005 | */ | |
1006 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1007 | struct nfs_fh *fh, | |
7e6eb683 BS |
1008 | struct nfs_fattr *fattr, |
1009 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1010 | { |
1011 | struct nfs_server *server; | |
fbca779a | 1012 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1013 | int error; |
1014 | ||
1015 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1016 | (unsigned long long) fattr->fsid.major, |
1017 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1018 | |
1019 | server = nfs_alloc_server(); | |
1020 | if (!server) | |
1021 | return ERR_PTR(-ENOMEM); | |
1022 | ||
fbca779a TM |
1023 | error = -ENOMEM; |
1024 | fattr_fsinfo = nfs_alloc_fattr(); | |
1025 | if (fattr_fsinfo == NULL) | |
1026 | goto out_free_server; | |
1027 | ||
54ceac45 DH |
1028 | /* Copy data from the source */ |
1029 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1030 | server->destroy = source->destroy; |
54ceac45 DH |
1031 | atomic_inc(&server->nfs_client->cl_count); |
1032 | nfs_server_copy_userdata(server, source); | |
1033 | ||
1034 | server->fsid = fattr->fsid; | |
1035 | ||
33170233 TM |
1036 | error = nfs_init_server_rpcclient(server, |
1037 | source->client->cl_timeout, | |
7e6eb683 | 1038 | flavor); |
54ceac45 DH |
1039 | if (error < 0) |
1040 | goto out_free_server; | |
54ceac45 DH |
1041 | |
1042 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1043 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1044 | if (error < 0) |
1045 | goto out_free_server; | |
1046 | ||
54af3bb5 TM |
1047 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1048 | server->namelen = NFS4_MAXNAMLEN; | |
1049 | ||
54ceac45 | 1050 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1051 | (unsigned long long) server->fsid.major, |
1052 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1053 | |
1054 | error = nfs_start_lockd(server); | |
1055 | if (error < 0) | |
1056 | goto out_free_server; | |
1057 | ||
fca5238e | 1058 | nfs_server_insert_lists(server); |
54ceac45 DH |
1059 | server->mount_time = jiffies; |
1060 | ||
fbca779a | 1061 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1062 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1063 | return server; | |
1064 | ||
1065 | out_free_server: | |
fbca779a | 1066 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1067 | nfs_free_server(server); |
1068 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1069 | return ERR_PTR(error); | |
1070 | } | |
ddda8e0a | 1071 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1072 | |
6b13168b SK |
1073 | void nfs_clients_init(struct net *net) |
1074 | { | |
1075 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1076 | ||
1077 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1078 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1079 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1080 | idr_init(&nn->cb_ident_idr); |
1081 | #endif | |
4c03ae4a | 1082 | spin_lock_init(&nn->nfs_client_lock); |
f092075d | 1083 | nn->boot_time = CURRENT_TIME; |
6b13168b SK |
1084 | } |
1085 | ||
6aaca566 | 1086 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1087 | static int nfs_server_list_open(struct inode *inode, struct file *file); |
1088 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1089 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1090 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1091 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1092 | ||
88e9d34c | 1093 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1094 | .start = nfs_server_list_start, |
1095 | .next = nfs_server_list_next, | |
1096 | .stop = nfs_server_list_stop, | |
1097 | .show = nfs_server_list_show, | |
1098 | }; | |
1099 | ||
00977a59 | 1100 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1101 | .open = nfs_server_list_open, |
1102 | .read = seq_read, | |
1103 | .llseek = seq_lseek, | |
65b38851 | 1104 | .release = seq_release_net, |
34b37235 | 1105 | .owner = THIS_MODULE, |
6aaca566 DH |
1106 | }; |
1107 | ||
1108 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1109 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1110 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1111 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1112 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1113 | ||
88e9d34c | 1114 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1115 | .start = nfs_volume_list_start, |
1116 | .next = nfs_volume_list_next, | |
1117 | .stop = nfs_volume_list_stop, | |
1118 | .show = nfs_volume_list_show, | |
1119 | }; | |
1120 | ||
00977a59 | 1121 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1122 | .open = nfs_volume_list_open, |
1123 | .read = seq_read, | |
1124 | .llseek = seq_lseek, | |
65b38851 | 1125 | .release = seq_release_net, |
34b37235 | 1126 | .owner = THIS_MODULE, |
6aaca566 DH |
1127 | }; |
1128 | ||
1129 | /* | |
1130 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1131 | * we're dealing | |
1132 | */ | |
1133 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1134 | { | |
65b38851 EB |
1135 | return seq_open_net(inode, file, &nfs_server_list_ops, |
1136 | sizeof(struct seq_net_private)); | |
6aaca566 DH |
1137 | } |
1138 | ||
1139 | /* | |
1140 | * set up the iterator to start reading from the server list and return the first item | |
1141 | */ | |
1142 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1143 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1144 | { |
65b38851 | 1145 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1146 | |
6aaca566 | 1147 | /* lock the list against modification */ |
dc030858 | 1148 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1149 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1150 | } |
1151 | ||
1152 | /* | |
1153 | * move to next server | |
1154 | */ | |
1155 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1156 | { | |
65b38851 | 1157 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1158 | |
1159 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1160 | } |
1161 | ||
1162 | /* | |
1163 | * clean up after reading from the transports list | |
1164 | */ | |
1165 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1166 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1167 | { |
65b38851 | 1168 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1169 | |
1170 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1171 | } |
1172 | ||
1173 | /* | |
1174 | * display a header line followed by a load of call lines | |
1175 | */ | |
1176 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1177 | { | |
1178 | struct nfs_client *clp; | |
65b38851 | 1179 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1180 | |
1181 | /* display header on line 1 */ | |
6b13168b | 1182 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1183 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | /* display one transport per line on subsequent lines */ | |
1188 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1189 | ||
940aab49 MN |
1190 | /* Check if the client is initialized */ |
1191 | if (clp->cl_cons_state != NFS_CS_READY) | |
1192 | return 0; | |
1193 | ||
2446ab60 | 1194 | rcu_read_lock(); |
5d8515ca | 1195 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1196 | clp->rpc_ops->version, |
5d8515ca CL |
1197 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1198 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1199 | atomic_read(&clp->cl_count), |
1200 | clp->cl_hostname); | |
2446ab60 | 1201 | rcu_read_unlock(); |
6aaca566 DH |
1202 | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1208 | */ | |
1209 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1210 | { | |
2f3169fb | 1211 | return seq_open_net(inode, file, &nfs_volume_list_ops, |
65b38851 | 1212 | sizeof(struct seq_net_private)); |
6aaca566 DH |
1213 | } |
1214 | ||
1215 | /* | |
1216 | * set up the iterator to start reading from the volume list and return the first item | |
1217 | */ | |
1218 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1219 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1220 | { |
65b38851 | 1221 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1222 | |
6aaca566 | 1223 | /* lock the list against modification */ |
dc030858 | 1224 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1225 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1226 | } |
1227 | ||
1228 | /* | |
1229 | * move to next volume | |
1230 | */ | |
1231 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1232 | { | |
65b38851 | 1233 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1234 | |
1235 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1236 | } |
1237 | ||
1238 | /* | |
1239 | * clean up after reading from the transports list | |
1240 | */ | |
1241 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1242 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1243 | { |
65b38851 | 1244 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1245 | |
1246 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1247 | } |
1248 | ||
1249 | /* | |
1250 | * display a header line followed by a load of call lines | |
1251 | */ | |
1252 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1253 | { | |
1254 | struct nfs_server *server; | |
1255 | struct nfs_client *clp; | |
df05a49f KM |
1256 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1257 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1258 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1259 | |
1260 | /* display header on line 1 */ | |
c25d32b2 | 1261 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1262 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1263 | " FSC\n"); | |
6aaca566 DH |
1264 | return 0; |
1265 | } | |
1266 | /* display one transport per line on subsequent lines */ | |
1267 | server = list_entry(v, struct nfs_server, master_link); | |
1268 | clp = server->nfs_client; | |
1269 | ||
df05a49f | 1270 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1271 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1272 | ||
df05a49f | 1273 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1274 | (unsigned long long) server->fsid.major, |
1275 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1276 | |
2446ab60 | 1277 | rcu_read_lock(); |
df05a49f | 1278 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1279 | clp->rpc_ops->version, |
5d8515ca CL |
1280 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1281 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1282 | dev, |
5d1acff1 DH |
1283 | fsid, |
1284 | nfs_server_fscache_state(server)); | |
2446ab60 | 1285 | rcu_read_unlock(); |
6aaca566 DH |
1286 | |
1287 | return 0; | |
1288 | } | |
1289 | ||
65b38851 EB |
1290 | int nfs_fs_proc_net_init(struct net *net) |
1291 | { | |
1292 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1293 | struct proc_dir_entry *p; | |
1294 | ||
1295 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1296 | if (!nn->proc_nfsfs) | |
1297 | goto error_0; | |
1298 | ||
1299 | /* a file of servers with which we're dealing */ | |
1300 | p = proc_create("servers", S_IFREG|S_IRUGO, | |
1301 | nn->proc_nfsfs, &nfs_server_list_fops); | |
1302 | if (!p) | |
1303 | goto error_1; | |
1304 | ||
1305 | /* a file of volumes that we have mounted */ | |
1306 | p = proc_create("volumes", S_IFREG|S_IRUGO, | |
1307 | nn->proc_nfsfs, &nfs_volume_list_fops); | |
1308 | if (!p) | |
21e81002 | 1309 | goto error_1; |
65b38851 EB |
1310 | return 0; |
1311 | ||
65b38851 | 1312 | error_1: |
21e81002 | 1313 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1314 | error_0: |
1315 | return -ENOMEM; | |
1316 | } | |
1317 | ||
1318 | void nfs_fs_proc_net_exit(struct net *net) | |
1319 | { | |
21e81002 | 1320 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1321 | } |
1322 | ||
6aaca566 DH |
1323 | /* |
1324 | * initialise the /proc/fs/nfsfs/ directory | |
1325 | */ | |
1326 | int __init nfs_fs_proc_init(void) | |
1327 | { | |
6a062a36 | 1328 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1329 | goto error_0; |
1330 | ||
6aaca566 | 1331 | /* a file of servers with which we're dealing */ |
6a062a36 | 1332 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1333 | goto error_1; |
1334 | ||
6aaca566 | 1335 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1336 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1337 | goto error_1; | |
6aaca566 | 1338 | |
6a062a36 | 1339 | return 0; |
6aaca566 | 1340 | error_1: |
6a062a36 | 1341 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1342 | error_0: |
1343 | return -ENOMEM; | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * clean up the /proc/fs/nfsfs/ directory | |
1348 | */ | |
1349 | void nfs_fs_proc_exit(void) | |
1350 | { | |
6a062a36 | 1351 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1352 | } |
1353 | ||
1354 | #endif /* CONFIG_PROC_FS */ |