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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)) |
04ea1b3e | 316 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
317 | if (IS_ERR(clp->cl_rpcclient) || |
318 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
319 | sap)) |
320 | continue; | |
c81468a1 TM |
321 | |
322 | atomic_inc(&clp->cl_count); | |
323 | return clp; | |
13bbc06a | 324 | } |
c81468a1 | 325 | return NULL; |
24c8dbbb DH |
326 | } |
327 | ||
a33e4b03 WAA |
328 | /* |
329 | * Return true if @clp is done initializing, false if still working on it. | |
330 | * | |
331 | * Use nfs_client_init_status to check if it was successful. | |
332 | */ | |
333 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 334 | { |
48d66b97 | 335 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 336 | } |
a33e4b03 WAA |
337 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
338 | ||
339 | /* | |
340 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
341 | * | |
342 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
343 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
344 | */ | |
345 | int nfs_client_init_status(const struct nfs_client *clp) | |
346 | { | |
347 | /* called without checking nfs_client_init_is_complete */ | |
348 | if (clp->cl_cons_state > NFS_CS_READY) { | |
349 | WARN_ON_ONCE(1); | |
350 | return -EINVAL; | |
351 | } | |
352 | return clp->cl_cons_state; | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
355 | |
356 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
357 | { | |
358 | return wait_event_killable(nfs_client_active_wq, | |
359 | nfs_client_init_is_complete(clp)); | |
360 | } | |
89d77c8f | 361 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 362 | |
f411703a CL |
363 | /* |
364 | * Found an existing client. Make sure it's ready before returning. | |
365 | */ | |
366 | static struct nfs_client * | |
367 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
368 | struct nfs_client *clp) | |
369 | { | |
370 | int error; | |
371 | ||
4697bd5e | 372 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
373 | if (error < 0) { |
374 | nfs_put_client(clp); | |
375 | return ERR_PTR(-ERESTARTSYS); | |
376 | } | |
377 | ||
378 | if (clp->cl_cons_state < NFS_CS_READY) { | |
379 | error = clp->cl_cons_state; | |
380 | nfs_put_client(clp); | |
381 | return ERR_PTR(error); | |
382 | } | |
383 | ||
54ac471c TM |
384 | smp_rmb(); |
385 | ||
f411703a CL |
386 | dprintk("<-- %s found nfs_client %p for %s\n", |
387 | __func__, clp, cl_init->hostname ?: ""); | |
388 | return clp; | |
389 | } | |
390 | ||
24c8dbbb DH |
391 | /* |
392 | * Look up a client by IP address and protocol version | |
393 | * - creates a new record if one doesn't yet exist | |
394 | */ | |
7d38de3f | 395 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
396 | { |
397 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 398 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 399 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 400 | |
31434f49 PT |
401 | if (cl_init->hostname == NULL) { |
402 | WARN_ON(1); | |
403 | return NULL; | |
404 | } | |
405 | ||
d7422c47 | 406 | dprintk("--> nfs_get_client(%s,v%u)\n", |
31434f49 | 407 | cl_init->hostname, rpc_ops->version); |
24c8dbbb DH |
408 | |
409 | /* see if the client already exists */ | |
410 | do { | |
dc030858 | 411 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 412 | |
c81468a1 | 413 | clp = nfs_match_client(cl_init); |
f411703a CL |
414 | if (clp) { |
415 | spin_unlock(&nn->nfs_client_lock); | |
416 | if (new) | |
cdb7eced | 417 | new->rpc_ops->free_client(new); |
f411703a CL |
418 | return nfs_found_client(cl_init, clp); |
419 | } | |
8cab4c39 | 420 | if (new) { |
05f4c350 CL |
421 | list_add_tail(&new->cl_share_link, |
422 | &nn->nfs_client_list); | |
8cab4c39 | 423 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 424 | new->cl_flags = cl_init->init_flags; |
5c6e5b60 | 425 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 426 | } |
24c8dbbb | 427 | |
dc030858 | 428 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 429 | |
ab7017a3 | 430 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 431 | } while (!IS_ERR(new)); |
24c8dbbb | 432 | |
f411703a | 433 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
31434f49 | 434 | cl_init->hostname, PTR_ERR(new)); |
a21bdd9b | 435 | return new; |
24c8dbbb | 436 | } |
89d77c8f | 437 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
438 | |
439 | /* | |
440 | * Mark a server as ready or failed | |
441 | */ | |
76db6d95 | 442 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 443 | { |
54ac471c | 444 | smp_wmb(); |
24c8dbbb DH |
445 | clp->cl_cons_state = state; |
446 | wake_up_all(&nfs_client_active_wq); | |
447 | } | |
89d77c8f | 448 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
449 | |
450 | /* | |
451 | * Initialise the timeout values for a connection | |
452 | */ | |
fcf10398 | 453 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 454 | int timeo, int retrans) |
5006a76c DH |
455 | { |
456 | to->to_initval = timeo * HZ / 10; | |
457 | to->to_retries = retrans; | |
5006a76c DH |
458 | |
459 | switch (proto) { | |
0896a725 | 460 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 461 | case XPRT_TRANSPORT_RDMA: |
a956beda | 462 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 463 | to->to_retries = NFS_DEF_TCP_RETRANS; |
a956beda | 464 | if (timeo == NFS_UNSPEC_TIMEO || to->to_retries == 0) |
259875ef | 465 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
466 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
467 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
468 | to->to_increment = to->to_initval; | |
469 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
470 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
471 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
472 | if (to->to_maxval < to->to_initval) | |
473 | to->to_maxval = to->to_initval; | |
5006a76c DH |
474 | to->to_exponential = 0; |
475 | break; | |
0896a725 | 476 | case XPRT_TRANSPORT_UDP: |
a956beda | 477 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 478 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 479 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 480 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
481 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
482 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
483 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
484 | to->to_exponential = 1; | |
485 | break; | |
259875ef TM |
486 | default: |
487 | BUG(); | |
5006a76c DH |
488 | } |
489 | } | |
89d77c8f | 490 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
491 | |
492 | /* | |
493 | * Create an RPC client handle | |
494 | */ | |
428360d7 | 495 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 496 | const struct nfs_client_initdata *cl_init, |
428360d7 | 497 | rpc_authflavor_t flavor) |
5006a76c | 498 | { |
5006a76c | 499 | struct rpc_clnt *clnt = NULL; |
41877d20 | 500 | struct rpc_create_args args = { |
73ea666c | 501 | .net = clp->cl_net, |
59dca3b2 | 502 | .protocol = clp->cl_proto, |
41877d20 | 503 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 504 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 505 | .timeout = cl_init->timeparms, |
41877d20 | 506 | .servername = clp->cl_hostname, |
5c6e5b60 | 507 | .nodename = cl_init->nodename, |
41877d20 CL |
508 | .program = &nfs_program, |
509 | .version = clp->rpc_ops->version, | |
510 | .authflavor = flavor, | |
511 | }; | |
5006a76c | 512 | |
4bf590e0 | 513 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 514 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
515 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
516 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 517 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 518 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
519 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
520 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4a01b8a4 | 521 | |
5006a76c DH |
522 | if (!IS_ERR(clp->cl_rpcclient)) |
523 | return 0; | |
524 | ||
41877d20 | 525 | clnt = rpc_create(&args); |
5006a76c DH |
526 | if (IS_ERR(clnt)) { |
527 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 528 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
529 | return PTR_ERR(clnt); |
530 | } | |
531 | ||
5006a76c DH |
532 | clp->cl_rpcclient = clnt; |
533 | return 0; | |
534 | } | |
89d77c8f | 535 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
536 | |
537 | /* | |
538 | * Version 2 or 3 client destruction | |
539 | */ | |
540 | static void nfs_destroy_server(struct nfs_server *server) | |
541 | { | |
f259613a | 542 | if (server->nlm_host) |
9289e7f9 | 543 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
544 | } |
545 | ||
546 | /* | |
547 | * Version 2 or 3 lockd setup | |
548 | */ | |
549 | static int nfs_start_lockd(struct nfs_server *server) | |
550 | { | |
9289e7f9 CL |
551 | struct nlm_host *host; |
552 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
553 | struct nlmclnt_initdata nlm_init = { |
554 | .hostname = clp->cl_hostname, | |
555 | .address = (struct sockaddr *)&clp->cl_addr, | |
556 | .addrlen = clp->cl_addrlen, | |
883bb163 | 557 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
558 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
559 | 1 : 0, | |
73ea666c | 560 | .net = clp->cl_net, |
883bb163 | 561 | }; |
54ceac45 | 562 | |
883bb163 | 563 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 564 | return 0; |
5eebde23 SJ |
565 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
566 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
567 | return 0; |
568 | ||
8a6e5deb TM |
569 | switch (clp->cl_proto) { |
570 | default: | |
571 | nlm_init.protocol = IPPROTO_TCP; | |
572 | break; | |
573 | case XPRT_TRANSPORT_UDP: | |
574 | nlm_init.protocol = IPPROTO_UDP; | |
575 | } | |
576 | ||
883bb163 | 577 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
578 | if (IS_ERR(host)) |
579 | return PTR_ERR(host); | |
580 | ||
581 | server->nlm_host = host; | |
582 | server->destroy = nfs_destroy_server; | |
583 | return 0; | |
54ceac45 DH |
584 | } |
585 | ||
54ceac45 DH |
586 | /* |
587 | * Create a general RPC client | |
588 | */ | |
fcf10398 | 589 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
590 | const struct rpc_timeout *timeo, |
591 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
592 | { |
593 | struct nfs_client *clp = server->nfs_client; | |
594 | ||
ba9b584c CL |
595 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
596 | pseudoflavour); | |
54ceac45 | 597 | if (IS_ERR(server->client)) { |
3110ff80 | 598 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
599 | return PTR_ERR(server->client); |
600 | } | |
601 | ||
33170233 TM |
602 | memcpy(&server->client->cl_timeout_default, |
603 | timeo, | |
604 | sizeof(server->client->cl_timeout_default)); | |
605 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 DH |
606 | server->client->cl_softrtry = 0; |
607 | if (server->flags & NFS_MOUNT_SOFT) | |
608 | server->client->cl_softrtry = 1; | |
609 | ||
54ceac45 DH |
610 | return 0; |
611 | } | |
89d77c8f | 612 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 613 | |
8cab4c39 CL |
614 | /** |
615 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
616 | * | |
617 | * @clp: nfs_client to initialise | |
5c6e5b60 | 618 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
619 | * |
620 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 621 | */ |
8cab4c39 | 622 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 623 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 624 | { |
54ceac45 DH |
625 | int error; |
626 | ||
627 | if (clp->cl_cons_state == NFS_CS_READY) { | |
628 | /* the client is already initialised */ | |
629 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 630 | return clp; |
54ceac45 DH |
631 | } |
632 | ||
54ceac45 DH |
633 | /* |
634 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
635 | * - RFC 2623, sec 2.3.2 | |
636 | */ | |
5c6e5b60 | 637 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
54ceac45 DH |
638 | if (error < 0) |
639 | goto error; | |
640 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 641 | return clp; |
54ceac45 DH |
642 | |
643 | error: | |
644 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 645 | nfs_put_client(clp); |
54ceac45 | 646 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 647 | return ERR_PTR(error); |
54ceac45 | 648 | } |
ddda8e0a | 649 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
650 | |
651 | /* | |
652 | * Create a version 2 or 3 client | |
653 | */ | |
2283f8d6 | 654 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
655 | const struct nfs_parsed_mount_data *data, |
656 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 657 | { |
5c6e5b60 | 658 | struct rpc_timeout timeparms; |
3a498026 TM |
659 | struct nfs_client_initdata cl_init = { |
660 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 661 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 662 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 663 | .nfs_mod = nfs_mod, |
59dca3b2 | 664 | .proto = data->nfs_server.protocol, |
e50a7a1a | 665 | .net = data->net, |
5c6e5b60 | 666 | .timeparms = &timeparms, |
3a498026 | 667 | }; |
54ceac45 | 668 | struct nfs_client *clp; |
3a498026 | 669 | int error; |
54ceac45 DH |
670 | |
671 | dprintk("--> nfs_init_server()\n"); | |
672 | ||
45a52a02 AA |
673 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
674 | data->timeo, data->retrans); | |
4bf590e0 CL |
675 | if (data->flags & NFS_MOUNT_NORESVPORT) |
676 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 677 | |
54ceac45 | 678 | /* Allocate or find a client reference we can use */ |
7d38de3f | 679 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
680 | if (IS_ERR(clp)) { |
681 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
682 | return PTR_ERR(clp); | |
683 | } | |
684 | ||
54ceac45 DH |
685 | server->nfs_client = clp; |
686 | ||
687 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 688 | server->flags = data->flags; |
b797cac7 | 689 | server->options = data->options; |
62ab460c TM |
690 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
691 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
cd812599 | 692 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; |
54ceac45 DH |
693 | |
694 | if (data->rsize) | |
695 | server->rsize = nfs_block_size(data->rsize, NULL); | |
696 | if (data->wsize) | |
697 | server->wsize = nfs_block_size(data->wsize, NULL); | |
698 | ||
699 | server->acregmin = data->acregmin * HZ; | |
700 | server->acregmax = data->acregmax * HZ; | |
701 | server->acdirmin = data->acdirmin * HZ; | |
702 | server->acdirmax = data->acdirmax * HZ; | |
703 | ||
704 | /* Start lockd here, before we might error out */ | |
705 | error = nfs_start_lockd(server); | |
706 | if (error < 0) | |
707 | goto error; | |
708 | ||
f22d6d79 | 709 | server->port = data->nfs_server.port; |
0f5f49b8 | 710 | server->auth_info = data->auth_info; |
f22d6d79 | 711 | |
a3f73c27 WAA |
712 | error = nfs_init_server_rpcclient(server, &timeparms, |
713 | data->selected_flavor); | |
54ceac45 DH |
714 | if (error < 0) |
715 | goto error; | |
716 | ||
3f8400d1 CL |
717 | /* Preserve the values of mount_server-related mount options */ |
718 | if (data->mount_server.addrlen) { | |
719 | memcpy(&server->mountd_address, &data->mount_server.address, | |
720 | data->mount_server.addrlen); | |
721 | server->mountd_addrlen = data->mount_server.addrlen; | |
722 | } | |
723 | server->mountd_version = data->mount_server.version; | |
724 | server->mountd_port = data->mount_server.port; | |
725 | server->mountd_protocol = data->mount_server.protocol; | |
726 | ||
54ceac45 | 727 | server->namelen = data->namlen; |
54ceac45 DH |
728 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
729 | return 0; | |
730 | ||
731 | error: | |
732 | server->nfs_client = NULL; | |
733 | nfs_put_client(clp); | |
734 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
735 | return error; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Load up the server record from information gained in an fsinfo record | |
740 | */ | |
738fd0f3 | 741 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 742 | struct nfs_fsinfo *fsinfo) |
54ceac45 DH |
743 | { |
744 | unsigned long max_rpc_payload; | |
745 | ||
746 | /* Work out a lot of parameters */ | |
747 | if (server->rsize == 0) | |
748 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
749 | if (server->wsize == 0) | |
750 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
751 | ||
752 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
753 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
754 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
755 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
756 | ||
757 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
758 | if (server->rsize > max_rpc_payload) | |
759 | server->rsize = max_rpc_payload; | |
760 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
761 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 762 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 763 | |
d993831f | 764 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
765 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
766 | ||
767 | if (server->wsize > max_rpc_payload) | |
768 | server->wsize = max_rpc_payload; | |
769 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
770 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 771 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 772 | |
54ceac45 DH |
773 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
774 | ||
775 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
09cbfeaf KS |
776 | if (server->dtsize > PAGE_SIZE * NFS_MAX_READDIR_PAGES) |
777 | server->dtsize = PAGE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
778 | if (server->dtsize > server->rsize) |
779 | server->dtsize = server->rsize; | |
780 | ||
781 | if (server->flags & NFS_MOUNT_NOAC) { | |
782 | server->acregmin = server->acregmax = 0; | |
783 | server->acdirmin = server->acdirmax = 0; | |
784 | } | |
785 | ||
786 | server->maxfilesize = fsinfo->maxfilesize; | |
787 | ||
6b96724e RL |
788 | server->time_delta = fsinfo->time_delta; |
789 | ||
2a92ee92 | 790 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
791 | /* We're airborne Set socket buffersize */ |
792 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
793 | } | |
794 | ||
795 | /* | |
796 | * Probe filesystem information, including the FSID on v2/v3 | |
797 | */ | |
fcf10398 | 798 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
799 | { |
800 | struct nfs_fsinfo fsinfo; | |
801 | struct nfs_client *clp = server->nfs_client; | |
802 | int error; | |
803 | ||
804 | dprintk("--> nfs_probe_fsinfo()\n"); | |
805 | ||
806 | if (clp->rpc_ops->set_capabilities != NULL) { | |
807 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
808 | if (error < 0) | |
809 | goto out_error; | |
810 | } | |
811 | ||
812 | fsinfo.fattr = fattr; | |
ca440c38 | 813 | fsinfo.nlayouttypes = 0; |
3132e49e | 814 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
815 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
816 | if (error < 0) | |
817 | goto out_error; | |
818 | ||
71f81e51 | 819 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
820 | |
821 | /* Get some general file system info */ | |
822 | if (server->namelen == 0) { | |
823 | struct nfs_pathconf pathinfo; | |
824 | ||
825 | pathinfo.fattr = fattr; | |
826 | nfs_fattr_init(fattr); | |
827 | ||
828 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
829 | server->namelen = pathinfo.max_namelen; | |
830 | } | |
831 | ||
832 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
833 | return 0; | |
834 | ||
835 | out_error: | |
836 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
837 | return error; | |
838 | } | |
89d77c8f | 839 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
840 | |
841 | /* | |
842 | * Copy useful information when duplicating a server record | |
843 | */ | |
fcf10398 | 844 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
845 | { |
846 | target->flags = source->flags; | |
356e76b8 CL |
847 | target->rsize = source->rsize; |
848 | target->wsize = source->wsize; | |
54ceac45 DH |
849 | target->acregmin = source->acregmin; |
850 | target->acregmax = source->acregmax; | |
851 | target->acdirmin = source->acdirmin; | |
852 | target->acdirmax = source->acdirmax; | |
853 | target->caps = source->caps; | |
2df54806 | 854 | target->options = source->options; |
0f5f49b8 | 855 | target->auth_info = source->auth_info; |
54ceac45 | 856 | } |
89d77c8f | 857 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 858 | |
fcf10398 | 859 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
860 | { |
861 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 862 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 863 | |
dc030858 | 864 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 865 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 866 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 867 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 868 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
869 | |
870 | } | |
89d77c8f | 871 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 872 | |
32e62b7c | 873 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 874 | { |
d3b4c9d7 | 875 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 876 | struct nfs_net *nn; |
d3b4c9d7 | 877 | |
4c03ae4a TM |
878 | if (clp == NULL) |
879 | return; | |
73ea666c | 880 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 881 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 882 | list_del_rcu(&server->client_link); |
4c03ae4a | 883 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 884 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 885 | list_del(&server->master_link); |
dc030858 | 886 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
887 | |
888 | synchronize_rcu(); | |
889 | } | |
32e62b7c | 890 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 891 | |
54ceac45 DH |
892 | /* |
893 | * Allocate and initialise a server record | |
894 | */ | |
fcf10398 | 895 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
896 | { |
897 | struct nfs_server *server; | |
898 | ||
899 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
900 | if (!server) | |
901 | return NULL; | |
902 | ||
903 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
904 | ||
905 | /* Zero out the NFS state stuff */ | |
906 | INIT_LIST_HEAD(&server->client_link); | |
907 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 908 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 909 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 910 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 911 | |
ef818a28 SD |
912 | atomic_set(&server->active, 0); |
913 | ||
54ceac45 DH |
914 | server->io_stats = nfs_alloc_iostats(); |
915 | if (!server->io_stats) { | |
916 | kfree(server); | |
917 | return NULL; | |
918 | } | |
919 | ||
48d07649 JA |
920 | if (bdi_init(&server->backing_dev_info)) { |
921 | nfs_free_iostats(server->io_stats); | |
922 | kfree(server); | |
923 | return NULL; | |
924 | } | |
925 | ||
9157c31d | 926 | ida_init(&server->openowner_id); |
d2d7ce28 | 927 | ida_init(&server->lockowner_id); |
f7e8917a FI |
928 | pnfs_init_server(server); |
929 | ||
54ceac45 DH |
930 | return server; |
931 | } | |
89d77c8f | 932 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
933 | |
934 | /* | |
935 | * Free up a server record | |
936 | */ | |
937 | void nfs_free_server(struct nfs_server *server) | |
938 | { | |
939 | dprintk("--> nfs_free_server()\n"); | |
940 | ||
fca5238e | 941 | nfs_server_remove_lists(server); |
54ceac45 DH |
942 | |
943 | if (server->destroy != NULL) | |
944 | server->destroy(server); | |
5cef338b TM |
945 | |
946 | if (!IS_ERR(server->client_acl)) | |
947 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
948 | if (!IS_ERR(server->client)) |
949 | rpc_shutdown_client(server->client); | |
950 | ||
951 | nfs_put_client(server->nfs_client); | |
952 | ||
d2d7ce28 | 953 | ida_destroy(&server->lockowner_id); |
9157c31d | 954 | ida_destroy(&server->openowner_id); |
54ceac45 | 955 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 956 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
957 | kfree(server); |
958 | nfs_release_automount_timer(); | |
959 | dprintk("<-- nfs_free_server()\n"); | |
960 | } | |
89d77c8f | 961 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
962 | |
963 | /* | |
964 | * Create a version 2 or 3 volume record | |
965 | * - keyed on server and FSID | |
966 | */ | |
1179acc6 | 967 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 968 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
969 | { |
970 | struct nfs_server *server; | |
fbca779a | 971 | struct nfs_fattr *fattr; |
54ceac45 DH |
972 | int error; |
973 | ||
974 | server = nfs_alloc_server(); | |
975 | if (!server) | |
976 | return ERR_PTR(-ENOMEM); | |
977 | ||
fbca779a TM |
978 | error = -ENOMEM; |
979 | fattr = nfs_alloc_fattr(); | |
980 | if (fattr == NULL) | |
981 | goto error; | |
982 | ||
54ceac45 | 983 | /* Get a client representation */ |
1179acc6 | 984 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
985 | if (error < 0) |
986 | goto error; | |
987 | ||
54ceac45 | 988 | /* Probe the root fh to retrieve its FSID */ |
1179acc6 | 989 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
990 | if (error < 0) |
991 | goto error; | |
54af3bb5 TM |
992 | if (server->nfs_client->rpc_ops->version == 3) { |
993 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
994 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 995 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
996 | server->caps |= NFS_CAP_READDIRPLUS; |
997 | } else { | |
998 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
999 | server->namelen = NFS2_MAXNAMLEN; | |
1000 | } | |
1001 | ||
fbca779a | 1002 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1775fd3e | 1003 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL); |
54ceac45 DH |
1004 | if (error < 0) { |
1005 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1006 | goto error; | |
1007 | } | |
1008 | } | |
fbca779a | 1009 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1010 | |
6daabf1b DH |
1011 | dprintk("Server FSID: %llx:%llx\n", |
1012 | (unsigned long long) server->fsid.major, | |
1013 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1014 | |
fca5238e | 1015 | nfs_server_insert_lists(server); |
54ceac45 | 1016 | server->mount_time = jiffies; |
fbca779a | 1017 | nfs_free_fattr(fattr); |
54ceac45 DH |
1018 | return server; |
1019 | ||
1020 | error: | |
fbca779a | 1021 | nfs_free_fattr(fattr); |
54ceac45 DH |
1022 | nfs_free_server(server); |
1023 | return ERR_PTR(error); | |
1024 | } | |
ddda8e0a | 1025 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1026 | |
54ceac45 DH |
1027 | /* |
1028 | * Clone an NFS2, NFS3 or NFS4 server record | |
1029 | */ | |
1030 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1031 | struct nfs_fh *fh, | |
7e6eb683 BS |
1032 | struct nfs_fattr *fattr, |
1033 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1034 | { |
1035 | struct nfs_server *server; | |
fbca779a | 1036 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1037 | int error; |
1038 | ||
1039 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1040 | (unsigned long long) fattr->fsid.major, |
1041 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1042 | |
1043 | server = nfs_alloc_server(); | |
1044 | if (!server) | |
1045 | return ERR_PTR(-ENOMEM); | |
1046 | ||
fbca779a TM |
1047 | error = -ENOMEM; |
1048 | fattr_fsinfo = nfs_alloc_fattr(); | |
1049 | if (fattr_fsinfo == NULL) | |
1050 | goto out_free_server; | |
1051 | ||
54ceac45 DH |
1052 | /* Copy data from the source */ |
1053 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1054 | server->destroy = source->destroy; |
54ceac45 DH |
1055 | atomic_inc(&server->nfs_client->cl_count); |
1056 | nfs_server_copy_userdata(server, source); | |
1057 | ||
1058 | server->fsid = fattr->fsid; | |
1059 | ||
33170233 TM |
1060 | error = nfs_init_server_rpcclient(server, |
1061 | source->client->cl_timeout, | |
7e6eb683 | 1062 | flavor); |
54ceac45 DH |
1063 | if (error < 0) |
1064 | goto out_free_server; | |
54ceac45 DH |
1065 | |
1066 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1067 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1068 | if (error < 0) |
1069 | goto out_free_server; | |
1070 | ||
54af3bb5 TM |
1071 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1072 | server->namelen = NFS4_MAXNAMLEN; | |
1073 | ||
54ceac45 | 1074 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1075 | (unsigned long long) server->fsid.major, |
1076 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1077 | |
1078 | error = nfs_start_lockd(server); | |
1079 | if (error < 0) | |
1080 | goto out_free_server; | |
1081 | ||
fca5238e | 1082 | nfs_server_insert_lists(server); |
54ceac45 DH |
1083 | server->mount_time = jiffies; |
1084 | ||
fbca779a | 1085 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1086 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1087 | return server; | |
1088 | ||
1089 | out_free_server: | |
fbca779a | 1090 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1091 | nfs_free_server(server); |
1092 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1093 | return ERR_PTR(error); | |
1094 | } | |
ddda8e0a | 1095 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1096 | |
6b13168b SK |
1097 | void nfs_clients_init(struct net *net) |
1098 | { | |
1099 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1100 | ||
1101 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1102 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1103 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1104 | idr_init(&nn->cb_ident_idr); |
1105 | #endif | |
4c03ae4a | 1106 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1107 | nn->boot_time = ktime_get_real(); |
6b13168b SK |
1108 | } |
1109 | ||
6aaca566 | 1110 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1111 | static int nfs_server_list_open(struct inode *inode, struct file *file); |
1112 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1113 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1114 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1115 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1116 | ||
88e9d34c | 1117 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1118 | .start = nfs_server_list_start, |
1119 | .next = nfs_server_list_next, | |
1120 | .stop = nfs_server_list_stop, | |
1121 | .show = nfs_server_list_show, | |
1122 | }; | |
1123 | ||
00977a59 | 1124 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1125 | .open = nfs_server_list_open, |
1126 | .read = seq_read, | |
1127 | .llseek = seq_lseek, | |
65b38851 | 1128 | .release = seq_release_net, |
6aaca566 DH |
1129 | }; |
1130 | ||
1131 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1132 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1133 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1134 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1135 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1136 | ||
88e9d34c | 1137 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1138 | .start = nfs_volume_list_start, |
1139 | .next = nfs_volume_list_next, | |
1140 | .stop = nfs_volume_list_stop, | |
1141 | .show = nfs_volume_list_show, | |
1142 | }; | |
1143 | ||
00977a59 | 1144 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1145 | .open = nfs_volume_list_open, |
1146 | .read = seq_read, | |
1147 | .llseek = seq_lseek, | |
65b38851 | 1148 | .release = seq_release_net, |
6aaca566 DH |
1149 | }; |
1150 | ||
1151 | /* | |
1152 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1153 | * we're dealing | |
1154 | */ | |
1155 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1156 | { | |
65b38851 EB |
1157 | return seq_open_net(inode, file, &nfs_server_list_ops, |
1158 | sizeof(struct seq_net_private)); | |
6aaca566 DH |
1159 | } |
1160 | ||
1161 | /* | |
1162 | * set up the iterator to start reading from the server list and return the first item | |
1163 | */ | |
1164 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1165 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1166 | { |
65b38851 | 1167 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1168 | |
6aaca566 | 1169 | /* lock the list against modification */ |
dc030858 | 1170 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1171 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1172 | } |
1173 | ||
1174 | /* | |
1175 | * move to next server | |
1176 | */ | |
1177 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1178 | { | |
65b38851 | 1179 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1180 | |
1181 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * clean up after reading from the transports list | |
1186 | */ | |
1187 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1188 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1189 | { |
65b38851 | 1190 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1191 | |
1192 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1193 | } |
1194 | ||
1195 | /* | |
1196 | * display a header line followed by a load of call lines | |
1197 | */ | |
1198 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1199 | { | |
1200 | struct nfs_client *clp; | |
65b38851 | 1201 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1202 | |
1203 | /* display header on line 1 */ | |
6b13168b | 1204 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1205 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /* display one transport per line on subsequent lines */ | |
1210 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1211 | ||
940aab49 MN |
1212 | /* Check if the client is initialized */ |
1213 | if (clp->cl_cons_state != NFS_CS_READY) | |
1214 | return 0; | |
1215 | ||
2446ab60 | 1216 | rcu_read_lock(); |
5d8515ca | 1217 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1218 | clp->rpc_ops->version, |
5d8515ca CL |
1219 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1220 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1221 | atomic_read(&clp->cl_count), |
1222 | clp->cl_hostname); | |
2446ab60 | 1223 | rcu_read_unlock(); |
6aaca566 DH |
1224 | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1230 | */ | |
1231 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1232 | { | |
2f3169fb | 1233 | return seq_open_net(inode, file, &nfs_volume_list_ops, |
65b38851 | 1234 | sizeof(struct seq_net_private)); |
6aaca566 DH |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * set up the iterator to start reading from the volume list and return the first item | |
1239 | */ | |
1240 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1241 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1242 | { |
65b38851 | 1243 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1244 | |
6aaca566 | 1245 | /* lock the list against modification */ |
dc030858 | 1246 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1247 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1248 | } |
1249 | ||
1250 | /* | |
1251 | * move to next volume | |
1252 | */ | |
1253 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1254 | { | |
65b38851 | 1255 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1256 | |
1257 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1258 | } |
1259 | ||
1260 | /* | |
1261 | * clean up after reading from the transports list | |
1262 | */ | |
1263 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1264 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1265 | { |
65b38851 | 1266 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1267 | |
1268 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1269 | } |
1270 | ||
1271 | /* | |
1272 | * display a header line followed by a load of call lines | |
1273 | */ | |
1274 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1275 | { | |
1276 | struct nfs_server *server; | |
1277 | struct nfs_client *clp; | |
df05a49f KM |
1278 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1279 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1280 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1281 | |
1282 | /* display header on line 1 */ | |
c25d32b2 | 1283 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1284 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1285 | " FSC\n"); | |
6aaca566 DH |
1286 | return 0; |
1287 | } | |
1288 | /* display one transport per line on subsequent lines */ | |
1289 | server = list_entry(v, struct nfs_server, master_link); | |
1290 | clp = server->nfs_client; | |
1291 | ||
df05a49f | 1292 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1293 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1294 | ||
df05a49f | 1295 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1296 | (unsigned long long) server->fsid.major, |
1297 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1298 | |
2446ab60 | 1299 | rcu_read_lock(); |
df05a49f | 1300 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1301 | clp->rpc_ops->version, |
5d8515ca CL |
1302 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1303 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1304 | dev, |
5d1acff1 DH |
1305 | fsid, |
1306 | nfs_server_fscache_state(server)); | |
2446ab60 | 1307 | rcu_read_unlock(); |
6aaca566 DH |
1308 | |
1309 | return 0; | |
1310 | } | |
1311 | ||
65b38851 EB |
1312 | int nfs_fs_proc_net_init(struct net *net) |
1313 | { | |
1314 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1315 | struct proc_dir_entry *p; | |
1316 | ||
1317 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1318 | if (!nn->proc_nfsfs) | |
1319 | goto error_0; | |
1320 | ||
1321 | /* a file of servers with which we're dealing */ | |
1322 | p = proc_create("servers", S_IFREG|S_IRUGO, | |
1323 | nn->proc_nfsfs, &nfs_server_list_fops); | |
1324 | if (!p) | |
1325 | goto error_1; | |
1326 | ||
1327 | /* a file of volumes that we have mounted */ | |
1328 | p = proc_create("volumes", S_IFREG|S_IRUGO, | |
1329 | nn->proc_nfsfs, &nfs_volume_list_fops); | |
1330 | if (!p) | |
21e81002 | 1331 | goto error_1; |
65b38851 EB |
1332 | return 0; |
1333 | ||
65b38851 | 1334 | error_1: |
21e81002 | 1335 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1336 | error_0: |
1337 | return -ENOMEM; | |
1338 | } | |
1339 | ||
1340 | void nfs_fs_proc_net_exit(struct net *net) | |
1341 | { | |
21e81002 | 1342 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1343 | } |
1344 | ||
6aaca566 DH |
1345 | /* |
1346 | * initialise the /proc/fs/nfsfs/ directory | |
1347 | */ | |
1348 | int __init nfs_fs_proc_init(void) | |
1349 | { | |
6a062a36 | 1350 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1351 | goto error_0; |
1352 | ||
6aaca566 | 1353 | /* a file of servers with which we're dealing */ |
6a062a36 | 1354 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1355 | goto error_1; |
1356 | ||
6aaca566 | 1357 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1358 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1359 | goto error_1; | |
6aaca566 | 1360 | |
6a062a36 | 1361 | return 0; |
6aaca566 | 1362 | error_1: |
6a062a36 | 1363 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1364 | error_0: |
1365 | return -ENOMEM; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * clean up the /proc/fs/nfsfs/ directory | |
1370 | */ | |
1371 | void nfs_fs_proc_exit(void) | |
1372 | { | |
6a062a36 | 1373 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1374 | } |
1375 | ||
1376 | #endif /* CONFIG_PROC_FS */ |