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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
24c8dbbb DH |
2 | /* client.c: NFS client sharing and management code |
3 | * | |
4 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
24c8dbbb DH |
6 | */ |
7 | ||
8 | ||
24c8dbbb DH |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
e8edc6e0 | 11 | #include <linux/sched.h> |
24c8dbbb DH |
12 | #include <linux/time.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/unistd.h> | |
d8efa4e6 | 19 | #include <linux/sunrpc/addr.h> |
24c8dbbb DH |
20 | #include <linux/sunrpc/clnt.h> |
21 | #include <linux/sunrpc/stats.h> | |
22 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 23 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 24 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
25 | #include <linux/nfs_fs.h> |
26 | #include <linux/nfs_mount.h> | |
27 | #include <linux/nfs4_mount.h> | |
28 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
29 | #include <linux/seq_file.h> |
30 | #include <linux/mount.h> | |
24c8dbbb DH |
31 | #include <linux/vfs.h> |
32 | #include <linux/inet.h> | |
3b0d3f93 | 33 | #include <linux/in6.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
40401530 | 35 | #include <linux/idr.h> |
3b0d3f93 | 36 | #include <net/ipv6.h> |
24c8dbbb | 37 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 38 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
39 | #include <linux/nsproxy.h> |
40 | #include <linux/pid_namespace.h> | |
24c8dbbb | 41 | |
24c8dbbb DH |
42 | |
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
14727281 | 48 | #include "fscache.h" |
85e174ba | 49 | #include "pnfs.h" |
ab7017a3 | 50 | #include "nfs.h" |
6b13168b | 51 | #include "netns.h" |
bf11fbdb | 52 | #include "sysfs.h" |
04a5da69 | 53 | #include "nfs42.h" |
24c8dbbb DH |
54 | |
55 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
56 | ||
24c8dbbb | 57 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
58 | static DEFINE_SPINLOCK(nfs_version_lock); |
59 | static DEFINE_MUTEX(nfs_version_mutex); | |
60 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 61 | |
5006a76c DH |
62 | /* |
63 | * RPC cruft for NFS | |
64 | */ | |
a613fa16 | 65 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
66 | [2] = NULL, |
67 | [3] = NULL, | |
68 | [4] = NULL, | |
5006a76c DH |
69 | }; |
70 | ||
a613fa16 | 71 | const struct rpc_program nfs_program = { |
5006a76c DH |
72 | .name = "nfs", |
73 | .number = NFS_PROGRAM, | |
74 | .nrvers = ARRAY_SIZE(nfs_version), | |
75 | .version = nfs_version, | |
fe0a9b74 | 76 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
77 | }; |
78 | ||
ab7017a3 BS |
79 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
80 | { | |
81 | struct nfs_subversion *nfs; | |
82 | spin_lock(&nfs_version_lock); | |
83 | ||
84 | list_for_each_entry(nfs, &nfs_versions, list) { | |
85 | if (nfs->rpc_ops->version == version) { | |
86 | spin_unlock(&nfs_version_lock); | |
87 | return nfs; | |
88 | } | |
ee34e136 | 89 | } |
ab7017a3 BS |
90 | |
91 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 92 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
93 | } |
94 | ||
95 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
96 | { | |
97 | struct nfs_subversion *nfs = find_nfs_version(version); | |
98 | ||
99 | if (IS_ERR(nfs)) { | |
100 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 101 | request_module("nfsv%d", version); |
ab7017a3 BS |
102 | nfs = find_nfs_version(version); |
103 | mutex_unlock(&nfs_version_mutex); | |
104 | } | |
105 | ||
1f70ef96 AK |
106 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
107 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
108 | return nfs; |
109 | } | |
110 | ||
111 | void put_nfs_version(struct nfs_subversion *nfs) | |
112 | { | |
113 | module_put(nfs->owner); | |
114 | } | |
115 | ||
116 | void register_nfs_version(struct nfs_subversion *nfs) | |
117 | { | |
118 | spin_lock(&nfs_version_lock); | |
119 | ||
120 | list_add(&nfs->list, &nfs_versions); | |
121 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
122 | ||
123 | spin_unlock(&nfs_version_lock); | |
124 | } | |
125 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
126 | ||
127 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
128 | { | |
129 | spin_lock(&nfs_version_lock); | |
130 | ||
131 | nfs_version[nfs->rpc_ops->version] = NULL; | |
132 | list_del(&nfs->list); | |
133 | ||
134 | spin_unlock(&nfs_version_lock); | |
135 | } | |
136 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
137 | ||
24c8dbbb DH |
138 | /* |
139 | * Allocate a shared client record | |
140 | * | |
141 | * Since these are allocated/deallocated very rarely, we don't | |
142 | * bother putting them in a slab cache... | |
143 | */ | |
6663ee7f | 144 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
145 | { |
146 | struct nfs_client *clp; | |
a21bdd9b | 147 | int err = -ENOMEM; |
24c8dbbb DH |
148 | |
149 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
150 | goto error_0; | |
151 | ||
55dee1bc | 152 | clp->cl_minorversion = cl_init->minorversion; |
ab7017a3 | 153 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
154 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
155 | goto error_dealloc; | |
ab7017a3 BS |
156 | |
157 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 158 | |
212bf41d | 159 | refcount_set(&clp->cl_count, 1); |
24c8dbbb DH |
160 | clp->cl_cons_state = NFS_CS_INITING; |
161 | ||
6e4cffd7 CL |
162 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
163 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 164 | |
3a498026 | 165 | if (cl_init->hostname) { |
a21bdd9b | 166 | err = -ENOMEM; |
3a498026 | 167 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 168 | if (!clp->cl_hostname) |
71468513 | 169 | goto error_cleanup; |
24c8dbbb DH |
170 | } |
171 | ||
172 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
173 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
174 | ||
468d126d | 175 | clp->cl_flags = cl_init->init_flags; |
59dca3b2 | 176 | clp->cl_proto = cl_init->proto; |
6619079d | 177 | clp->cl_nconnect = cl_init->nconnect; |
7e134205 | 178 | clp->cl_max_connect = cl_init->max_connect ? cl_init->max_connect : 1; |
73ea666c | 179 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 180 | |
5e16923b | 181 | clp->cl_principal = "*"; |
6c0a8c5f | 182 | clp->cl_xprtsec = cl_init->xprtsec; |
24c8dbbb DH |
183 | return clp; |
184 | ||
71468513 | 185 | error_cleanup: |
ab7017a3 | 186 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 187 | error_dealloc: |
24c8dbbb DH |
188 | kfree(clp); |
189 | error_0: | |
a21bdd9b | 190 | return ERR_PTR(err); |
24c8dbbb | 191 | } |
ddda8e0a | 192 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 193 | |
89d77c8f | 194 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 195 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 196 | { |
28cd1b3f SK |
197 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
198 | ||
199 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
200 | } |
201 | ||
202 | /* nfs_client_lock held */ | |
203 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
204 | { | |
73ea666c | 205 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 206 | |
f4eecd5d | 207 | if (clp->cl_cb_ident) |
28cd1b3f | 208 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
209 | } |
210 | ||
f7e8917a FI |
211 | static void pnfs_init_server(struct nfs_server *server) |
212 | { | |
213 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
214 | } | |
215 | ||
888ef2e3 | 216 | #else |
10b7a70c | 217 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
218 | { |
219 | } | |
220 | ||
221 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
222 | { | |
223 | } | |
f7e8917a FI |
224 | |
225 | static void pnfs_init_server(struct nfs_server *server) | |
226 | { | |
227 | } | |
228 | ||
888ef2e3 | 229 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 230 | |
24c8dbbb DH |
231 | /* |
232 | * Destroy a shared client record | |
233 | */ | |
cdb7eced | 234 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 235 | { |
24c8dbbb DH |
236 | /* -EIO all pending I/O */ |
237 | if (!IS_ERR(clp->cl_rpcclient)) | |
238 | rpc_shutdown_client(clp->cl_rpcclient); | |
239 | ||
73ea666c | 240 | put_net(clp->cl_net); |
ab7017a3 | 241 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 242 | kfree(clp->cl_hostname); |
f11b2a1c | 243 | kfree(clp->cl_acceptor); |
c1b967d0 | 244 | kfree_rcu(clp, rcu); |
24c8dbbb | 245 | } |
ddda8e0a | 246 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
247 | |
248 | /* | |
249 | * Release a reference to a shared client record | |
250 | */ | |
251 | void nfs_put_client(struct nfs_client *clp) | |
252 | { | |
dc030858 SK |
253 | struct nfs_net *nn; |
254 | ||
27ba8512 DH |
255 | if (!clp) |
256 | return; | |
257 | ||
73ea666c | 258 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 259 | |
212bf41d | 260 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 261 | list_del(&clp->cl_share_link); |
f4eecd5d | 262 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 263 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 264 | |
1fea73a8 | 265 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 266 | |
cdb7eced | 267 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
268 | } |
269 | } | |
16b374ca | 270 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 271 | |
24c8dbbb | 272 | /* |
c81468a1 TM |
273 | * Find an nfs_client on the list that matches the initialisation data |
274 | * that is supplied. | |
24c8dbbb | 275 | */ |
c81468a1 | 276 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
277 | { |
278 | struct nfs_client *clp; | |
cf0d7e7f | 279 | const struct sockaddr *sap = (struct sockaddr *)data->addr; |
6b13168b | 280 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 281 | int error; |
24c8dbbb | 282 | |
c156618e | 283 | again: |
6b13168b | 284 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 285 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
286 | /* Don't match clients that failed to initialise properly */ |
287 | if (clp->cl_cons_state < 0) | |
288 | continue; | |
289 | ||
c156618e SM |
290 | /* If a client is still initializing then we need to wait */ |
291 | if (clp->cl_cons_state > NFS_CS_READY) { | |
292 | refcount_inc(&clp->cl_count); | |
293 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 294 | error = nfs_wait_client_init_complete(clp); |
c156618e | 295 | nfs_put_client(clp); |
c260121a | 296 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
297 | if (error < 0) |
298 | return ERR_PTR(error); | |
c156618e SM |
299 | goto again; |
300 | } | |
301 | ||
c81468a1 | 302 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 303 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
304 | continue; |
305 | ||
59dca3b2 TM |
306 | if (clp->cl_proto != data->proto) |
307 | continue; | |
5aae4a9a BH |
308 | /* Match nfsv4 minorversion */ |
309 | if (clp->cl_minorversion != data->minorversion) | |
310 | continue; | |
52f98f1a TM |
311 | |
312 | /* Match request for a dedicated DS */ | |
313 | if (test_bit(NFS_CS_DS, &data->init_flags) != | |
314 | test_bit(NFS_CS_DS, &clp->cl_flags)) | |
315 | continue; | |
316 | ||
c81468a1 | 317 | /* Match the full socket address */ |
d8efa4e6 | 318 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 319 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
320 | if (IS_ERR(clp->cl_rpcclient) || |
321 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
322 | sap)) |
323 | continue; | |
c81468a1 | 324 | |
6c0a8c5f CL |
325 | /* Match the xprt security policy */ |
326 | if (clp->cl_xprtsec.policy != data->xprtsec.policy) | |
327 | continue; | |
328 | ||
212bf41d | 329 | refcount_inc(&clp->cl_count); |
c81468a1 | 330 | return clp; |
13bbc06a | 331 | } |
c81468a1 | 332 | return NULL; |
24c8dbbb DH |
333 | } |
334 | ||
a33e4b03 WAA |
335 | /* |
336 | * Return true if @clp is done initializing, false if still working on it. | |
337 | * | |
338 | * Use nfs_client_init_status to check if it was successful. | |
339 | */ | |
340 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 341 | { |
48d66b97 | 342 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 343 | } |
a33e4b03 WAA |
344 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
345 | ||
346 | /* | |
347 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
348 | * | |
349 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
350 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
351 | */ | |
352 | int nfs_client_init_status(const struct nfs_client *clp) | |
353 | { | |
354 | /* called without checking nfs_client_init_is_complete */ | |
355 | if (clp->cl_cons_state > NFS_CS_READY) { | |
356 | WARN_ON_ONCE(1); | |
357 | return -EINVAL; | |
358 | } | |
359 | return clp->cl_cons_state; | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
362 | |
363 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
364 | { | |
365 | return wait_event_killable(nfs_client_active_wq, | |
366 | nfs_client_init_is_complete(clp)); | |
367 | } | |
89d77c8f | 368 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 369 | |
f411703a CL |
370 | /* |
371 | * Found an existing client. Make sure it's ready before returning. | |
372 | */ | |
373 | static struct nfs_client * | |
374 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
375 | struct nfs_client *clp) | |
376 | { | |
377 | int error; | |
378 | ||
4697bd5e | 379 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
380 | if (error < 0) { |
381 | nfs_put_client(clp); | |
382 | return ERR_PTR(-ERESTARTSYS); | |
383 | } | |
384 | ||
385 | if (clp->cl_cons_state < NFS_CS_READY) { | |
386 | error = clp->cl_cons_state; | |
387 | nfs_put_client(clp); | |
388 | return ERR_PTR(error); | |
389 | } | |
390 | ||
54ac471c | 391 | smp_rmb(); |
f411703a CL |
392 | return clp; |
393 | } | |
394 | ||
24c8dbbb DH |
395 | /* |
396 | * Look up a client by IP address and protocol version | |
397 | * - creates a new record if one doesn't yet exist | |
398 | */ | |
7d38de3f | 399 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
400 | { |
401 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 402 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 403 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 404 | |
31434f49 PT |
405 | if (cl_init->hostname == NULL) { |
406 | WARN_ON(1); | |
09226e83 | 407 | return ERR_PTR(-EINVAL); |
31434f49 PT |
408 | } |
409 | ||
24c8dbbb DH |
410 | /* see if the client already exists */ |
411 | do { | |
dc030858 | 412 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 413 | |
c81468a1 | 414 | clp = nfs_match_client(cl_init); |
f411703a CL |
415 | if (clp) { |
416 | spin_unlock(&nn->nfs_client_lock); | |
417 | if (new) | |
cdb7eced | 418 | new->rpc_ops->free_client(new); |
9f7761cf BC |
419 | if (IS_ERR(clp)) |
420 | return clp; | |
f411703a CL |
421 | return nfs_found_client(cl_init, clp); |
422 | } | |
8cab4c39 | 423 | if (new) { |
05f4c350 CL |
424 | list_add_tail(&new->cl_share_link, |
425 | &nn->nfs_client_list); | |
8cab4c39 | 426 | spin_unlock(&nn->nfs_client_lock); |
5c6e5b60 | 427 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 428 | } |
24c8dbbb | 429 | |
dc030858 | 430 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 431 | |
ab7017a3 | 432 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 433 | } while (!IS_ERR(new)); |
24c8dbbb | 434 | |
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: |
c8407f2e | 461 | case XPRT_TRANSPORT_TCP_TLS: |
2cf7ff7a | 462 | case XPRT_TRANSPORT_RDMA: |
a956beda | 463 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 464 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 465 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 466 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
467 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
468 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
469 | to->to_increment = to->to_initval; | |
470 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
471 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
472 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
473 | if (to->to_maxval < to->to_initval) | |
474 | to->to_maxval = to->to_initval; | |
5006a76c DH |
475 | to->to_exponential = 0; |
476 | break; | |
0896a725 | 477 | case XPRT_TRANSPORT_UDP: |
a956beda | 478 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 479 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 480 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 481 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
482 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
483 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
484 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
485 | to->to_exponential = 1; | |
486 | break; | |
259875ef TM |
487 | default: |
488 | BUG(); | |
5006a76c DH |
489 | } |
490 | } | |
89d77c8f | 491 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
492 | |
493 | /* | |
494 | * Create an RPC client handle | |
495 | */ | |
428360d7 | 496 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 497 | const struct nfs_client_initdata *cl_init, |
428360d7 | 498 | rpc_authflavor_t flavor) |
5006a76c | 499 | { |
1548036e | 500 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
5006a76c | 501 | struct rpc_clnt *clnt = NULL; |
41877d20 | 502 | struct rpc_create_args args = { |
73ea666c | 503 | .net = clp->cl_net, |
59dca3b2 | 504 | .protocol = clp->cl_proto, |
6619079d | 505 | .nconnect = clp->cl_nconnect, |
41877d20 | 506 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 507 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 508 | .timeout = cl_init->timeparms, |
41877d20 | 509 | .servername = clp->cl_hostname, |
5c6e5b60 | 510 | .nodename = cl_init->nodename, |
41877d20 | 511 | .program = &nfs_program, |
1548036e | 512 | .stats = &nn->rpcstats, |
41877d20 CL |
513 | .version = clp->rpc_ops->version, |
514 | .authflavor = flavor, | |
1a58e8a0 | 515 | .cred = cl_init->cred, |
c8407f2e | 516 | .xprtsec = cl_init->xprtsec, |
537935f7 TM |
517 | .connect_timeout = cl_init->connect_timeout, |
518 | .reconnect_timeout = cl_init->reconnect_timeout, | |
41877d20 | 519 | }; |
5006a76c | 520 | |
4bf590e0 | 521 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 522 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
523 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
524 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 525 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 526 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
527 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
528 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4b1b69ce TM |
529 | if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
530 | args.flags |= RPC_CLNT_CREATE_NOPING; | |
e6237b6f TM |
531 | if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
532 | args.flags |= RPC_CLNT_CREATE_REUSEPORT; | |
4a01b8a4 | 533 | |
5006a76c DH |
534 | if (!IS_ERR(clp->cl_rpcclient)) |
535 | return 0; | |
536 | ||
41877d20 | 537 | clnt = rpc_create(&args); |
5006a76c DH |
538 | if (IS_ERR(clnt)) { |
539 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 540 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
541 | return PTR_ERR(clnt); |
542 | } | |
543 | ||
5e16923b | 544 | clnt->cl_principal = clp->cl_principal; |
5006a76c | 545 | clp->cl_rpcclient = clnt; |
dc48e0ab | 546 | clnt->cl_max_connect = clp->cl_max_connect; |
5006a76c DH |
547 | return 0; |
548 | } | |
89d77c8f | 549 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
550 | |
551 | /* | |
552 | * Version 2 or 3 client destruction | |
553 | */ | |
554 | static void nfs_destroy_server(struct nfs_server *server) | |
555 | { | |
f259613a | 556 | if (server->nlm_host) |
9289e7f9 | 557 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
558 | } |
559 | ||
560 | /* | |
561 | * Version 2 or 3 lockd setup | |
562 | */ | |
563 | static int nfs_start_lockd(struct nfs_server *server) | |
564 | { | |
9289e7f9 CL |
565 | struct nlm_host *host; |
566 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
567 | struct nlmclnt_initdata nlm_init = { |
568 | .hostname = clp->cl_hostname, | |
569 | .address = (struct sockaddr *)&clp->cl_addr, | |
570 | .addrlen = clp->cl_addrlen, | |
883bb163 | 571 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
572 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
573 | 1 : 0, | |
73ea666c | 574 | .net = clp->cl_net, |
b1ece737 | 575 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
d18a9d3f | 576 | .cred = server->cred, |
883bb163 | 577 | }; |
54ceac45 | 578 | |
883bb163 | 579 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 580 | return 0; |
5eebde23 SJ |
581 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
582 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
583 | return 0; |
584 | ||
8a6e5deb TM |
585 | switch (clp->cl_proto) { |
586 | default: | |
587 | nlm_init.protocol = IPPROTO_TCP; | |
588 | break; | |
b24ee6c6 | 589 | #ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT |
8a6e5deb TM |
590 | case XPRT_TRANSPORT_UDP: |
591 | nlm_init.protocol = IPPROTO_UDP; | |
b24ee6c6 | 592 | #endif |
8a6e5deb TM |
593 | } |
594 | ||
883bb163 | 595 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
596 | if (IS_ERR(host)) |
597 | return PTR_ERR(host); | |
598 | ||
599 | server->nlm_host = host; | |
600 | server->destroy = nfs_destroy_server; | |
d97c0589 | 601 | nfs_sysfs_link_rpc_client(server, nlmclnt_rpc_clnt(host), NULL); |
9289e7f9 | 602 | return 0; |
54ceac45 DH |
603 | } |
604 | ||
54ceac45 DH |
605 | /* |
606 | * Create a general RPC client | |
607 | */ | |
fcf10398 | 608 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
609 | const struct rpc_timeout *timeo, |
610 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
611 | { |
612 | struct nfs_client *clp = server->nfs_client; | |
613 | ||
ba9b584c CL |
614 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
615 | pseudoflavour); | |
54ceac45 | 616 | if (IS_ERR(server->client)) { |
3110ff80 | 617 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
618 | return PTR_ERR(server->client); |
619 | } | |
620 | ||
33170233 TM |
621 | memcpy(&server->client->cl_timeout_default, |
622 | timeo, | |
623 | sizeof(server->client->cl_timeout_default)); | |
624 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 625 | server->client->cl_softrtry = 0; |
91a575e1 TM |
626 | if (server->flags & NFS_MOUNT_SOFTERR) |
627 | server->client->cl_softerr = 1; | |
54ceac45 DH |
628 | if (server->flags & NFS_MOUNT_SOFT) |
629 | server->client->cl_softrtry = 1; | |
630 | ||
e13b5493 | 631 | nfs_sysfs_link_rpc_client(server, server->client, NULL); |
54ceac45 DH |
632 | return 0; |
633 | } | |
89d77c8f | 634 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 635 | |
8cab4c39 CL |
636 | /** |
637 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
638 | * | |
639 | * @clp: nfs_client to initialise | |
5c6e5b60 | 640 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
641 | * |
642 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 643 | */ |
8cab4c39 | 644 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 645 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 646 | { |
54ceac45 DH |
647 | int error; |
648 | ||
2844b6ae AS |
649 | /* the client is already initialised */ |
650 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 651 | return clp; |
54ceac45 | 652 | |
54ceac45 DH |
653 | /* |
654 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
655 | * - RFC 2623, sec 2.3.2 | |
656 | */ | |
5c6e5b60 | 657 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
658 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
659 | if (error < 0) { | |
660 | nfs_put_client(clp); | |
661 | clp = ERR_PTR(error); | |
662 | } | |
8cab4c39 | 663 | return clp; |
54ceac45 | 664 | } |
ddda8e0a | 665 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
666 | |
667 | /* | |
668 | * Create a version 2 or 3 client | |
669 | */ | |
2283f8d6 | 670 | static int nfs_init_server(struct nfs_server *server, |
62a55d08 | 671 | const struct fs_context *fc) |
54ceac45 | 672 | { |
62a55d08 | 673 | const struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5c6e5b60 | 674 | struct rpc_timeout timeparms; |
3a498026 | 675 | struct nfs_client_initdata cl_init = { |
38465f5d | 676 | .hostname = ctx->nfs_server.hostname, |
cf0d7e7f | 677 | .addr = &ctx->nfs_server._address, |
38465f5d | 678 | .addrlen = ctx->nfs_server.addrlen, |
62a55d08 | 679 | .nfs_mod = ctx->nfs_mod, |
38465f5d | 680 | .proto = ctx->nfs_server.protocol, |
62a55d08 | 681 | .net = fc->net_ns, |
5c6e5b60 | 682 | .timeparms = &timeparms, |
1a58e8a0 | 683 | .cred = server->cred, |
38465f5d | 684 | .nconnect = ctx->nfs_server.nconnect, |
e6237b6f | 685 | .init_flags = (1UL << NFS_CS_REUSEPORT), |
c8407f2e | 686 | .xprtsec = ctx->xprtsec, |
3a498026 | 687 | }; |
54ceac45 | 688 | struct nfs_client *clp; |
3a498026 | 689 | int error; |
54ceac45 | 690 | |
38465f5d SM |
691 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
692 | ctx->timeo, ctx->retrans); | |
693 | if (ctx->flags & NFS_MOUNT_NORESVPORT) | |
4bf590e0 | 694 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
45a52a02 | 695 | |
54ceac45 | 696 | /* Allocate or find a client reference we can use */ |
7d38de3f | 697 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 698 | if (IS_ERR(clp)) |
54ceac45 | 699 | return PTR_ERR(clp); |
54ceac45 | 700 | |
54ceac45 | 701 | server->nfs_client = clp; |
1c725118 | 702 | nfs_sysfs_add_server(server); |
e13b5493 | 703 | nfs_sysfs_link_rpc_client(server, clp->cl_rpcclient, "_state"); |
54ceac45 DH |
704 | |
705 | /* Initialise the client representation from the mount data */ | |
38465f5d SM |
706 | server->flags = ctx->flags; |
707 | server->options = ctx->options; | |
ce62b114 TM |
708 | server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; |
709 | ||
710 | switch (clp->rpc_ops->version) { | |
711 | case 2: | |
712 | server->fattr_valid = NFS_ATTR_FATTR_V2; | |
713 | break; | |
714 | case 3: | |
715 | server->fattr_valid = NFS_ATTR_FATTR_V3; | |
716 | break; | |
717 | default: | |
718 | server->fattr_valid = NFS_ATTR_FATTR_V4; | |
719 | } | |
54ceac45 | 720 | |
38465f5d | 721 | if (ctx->rsize) |
940261a1 | 722 | server->rsize = nfs_io_size(ctx->rsize, clp->cl_proto); |
38465f5d | 723 | if (ctx->wsize) |
940261a1 | 724 | server->wsize = nfs_io_size(ctx->wsize, clp->cl_proto); |
54ceac45 | 725 | |
38465f5d SM |
726 | server->acregmin = ctx->acregmin * HZ; |
727 | server->acregmax = ctx->acregmax * HZ; | |
728 | server->acdirmin = ctx->acdirmin * HZ; | |
729 | server->acdirmax = ctx->acdirmax * HZ; | |
54ceac45 DH |
730 | |
731 | /* Start lockd here, before we might error out */ | |
732 | error = nfs_start_lockd(server); | |
733 | if (error < 0) | |
734 | goto error; | |
735 | ||
38465f5d SM |
736 | server->port = ctx->nfs_server.port; |
737 | server->auth_info = ctx->auth_info; | |
f22d6d79 | 738 | |
a3f73c27 | 739 | error = nfs_init_server_rpcclient(server, &timeparms, |
38465f5d | 740 | ctx->selected_flavor); |
54ceac45 DH |
741 | if (error < 0) |
742 | goto error; | |
743 | ||
3f8400d1 | 744 | /* Preserve the values of mount_server-related mount options */ |
38465f5d SM |
745 | if (ctx->mount_server.addrlen) { |
746 | memcpy(&server->mountd_address, &ctx->mount_server.address, | |
747 | ctx->mount_server.addrlen); | |
748 | server->mountd_addrlen = ctx->mount_server.addrlen; | |
3f8400d1 | 749 | } |
38465f5d SM |
750 | server->mountd_version = ctx->mount_server.version; |
751 | server->mountd_port = ctx->mount_server.port; | |
752 | server->mountd_protocol = ctx->mount_server.protocol; | |
3f8400d1 | 753 | |
38465f5d | 754 | server->namelen = ctx->namlen; |
54ceac45 DH |
755 | return 0; |
756 | ||
757 | error: | |
758 | server->nfs_client = NULL; | |
759 | nfs_put_client(clp); | |
54ceac45 DH |
760 | return error; |
761 | } | |
762 | ||
763 | /* | |
764 | * Load up the server record from information gained in an fsinfo record | |
765 | */ | |
738fd0f3 | 766 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 767 | struct nfs_fsinfo *fsinfo) |
54ceac45 | 768 | { |
940261a1 | 769 | struct nfs_client *clp = server->nfs_client; |
04a5da69 | 770 | unsigned long max_rpc_payload, raw_max_rpc_payload; |
54ceac45 DH |
771 | |
772 | /* Work out a lot of parameters */ | |
773 | if (server->rsize == 0) | |
940261a1 | 774 | server->rsize = nfs_io_size(fsinfo->rtpref, clp->cl_proto); |
54ceac45 | 775 | if (server->wsize == 0) |
940261a1 | 776 | server->wsize = nfs_io_size(fsinfo->wtpref, clp->cl_proto); |
54ceac45 DH |
777 | |
778 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
940261a1 | 779 | server->rsize = nfs_io_size(fsinfo->rtmax, clp->cl_proto); |
54ceac45 | 780 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) |
940261a1 | 781 | server->wsize = nfs_io_size(fsinfo->wtmax, clp->cl_proto); |
54ceac45 | 782 | |
04a5da69 FL |
783 | raw_max_rpc_payload = rpc_max_payload(server->client); |
784 | max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL); | |
785 | ||
54ceac45 DH |
786 | if (server->rsize > max_rpc_payload) |
787 | server->rsize = max_rpc_payload; | |
788 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
789 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 790 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 791 | |
54ceac45 DH |
792 | if (server->wsize > max_rpc_payload) |
793 | server->wsize = max_rpc_payload; | |
794 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
795 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 796 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 797 | |
54ceac45 DH |
798 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
799 | ||
800 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
1a34c8c9 TM |
801 | if (server->dtsize > NFS_MAX_FILE_IO_SIZE) |
802 | server->dtsize = NFS_MAX_FILE_IO_SIZE; | |
54ceac45 DH |
803 | if (server->dtsize > server->rsize) |
804 | server->dtsize = server->rsize; | |
805 | ||
806 | if (server->flags & NFS_MOUNT_NOAC) { | |
807 | server->acregmin = server->acregmax = 0; | |
808 | server->acdirmin = server->acdirmax = 0; | |
809 | } | |
810 | ||
811 | server->maxfilesize = fsinfo->maxfilesize; | |
812 | ||
6b96724e | 813 | server->time_delta = fsinfo->time_delta; |
7f08a335 | 814 | server->change_attr_type = fsinfo->change_attr_type; |
6b96724e | 815 | |
2a92ee92 | 816 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
817 | /* We're airborne Set socket buffersize */ |
818 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
04a5da69 FL |
819 | |
820 | #ifdef CONFIG_NFS_V4_2 | |
821 | /* | |
822 | * Defaults until limited by the session parameters. | |
823 | */ | |
824 | server->gxasize = min_t(unsigned int, raw_max_rpc_payload, | |
825 | XATTR_SIZE_MAX); | |
826 | server->sxasize = min_t(unsigned int, raw_max_rpc_payload, | |
827 | XATTR_SIZE_MAX); | |
828 | server->lxasize = min_t(unsigned int, raw_max_rpc_payload, | |
829 | nfs42_listxattr_xdrsize(XATTR_LIST_MAX)); | |
b78ef845 FL |
830 | |
831 | if (fsinfo->xattr_support) | |
832 | server->caps |= NFS_CAP_XATTR; | |
04a5da69 | 833 | #endif |
54ceac45 DH |
834 | } |
835 | ||
836 | /* | |
837 | * Probe filesystem information, including the FSID on v2/v3 | |
838 | */ | |
5fe1210d | 839 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
840 | { |
841 | struct nfs_fsinfo fsinfo; | |
842 | struct nfs_client *clp = server->nfs_client; | |
843 | int error; | |
844 | ||
54ceac45 DH |
845 | if (clp->rpc_ops->set_capabilities != NULL) { |
846 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
847 | if (error < 0) | |
4cbb9768 | 848 | return error; |
54ceac45 DH |
849 | } |
850 | ||
851 | fsinfo.fattr = fattr; | |
ca440c38 | 852 | fsinfo.nlayouttypes = 0; |
3132e49e | 853 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
854 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
855 | if (error < 0) | |
4cbb9768 | 856 | return error; |
54ceac45 | 857 | |
71f81e51 | 858 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
859 | |
860 | /* Get some general file system info */ | |
861 | if (server->namelen == 0) { | |
862 | struct nfs_pathconf pathinfo; | |
863 | ||
864 | pathinfo.fattr = fattr; | |
865 | nfs_fattr_init(fattr); | |
866 | ||
867 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
868 | server->namelen = pathinfo.max_namelen; | |
869 | } | |
870 | ||
1976b2b3 | 871 | if (clp->rpc_ops->discover_trunking != NULL && |
a43bf604 OK |
872 | (server->caps & NFS_CAP_FS_LOCATIONS && |
873 | (server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) { | |
1976b2b3 OK |
874 | error = clp->rpc_ops->discover_trunking(server, mntfh); |
875 | if (error < 0) | |
876 | return error; | |
877 | } | |
878 | ||
54ceac45 | 879 | return 0; |
54ceac45 DH |
880 | } |
881 | ||
e5731131 AS |
882 | /* |
883 | * Grab the destination's particulars, including lease expiry time. | |
884 | * | |
885 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
886 | * we have cached. | |
887 | */ | |
888 | int nfs_probe_server(struct nfs_server *server, struct nfs_fh *mntfh) | |
889 | { | |
890 | struct nfs_fattr *fattr; | |
891 | int error; | |
892 | ||
893 | fattr = nfs_alloc_fattr(); | |
894 | if (fattr == NULL) | |
895 | return -ENOMEM; | |
896 | ||
897 | /* Sanity: the probe won't work if the destination server | |
898 | * does not recognize the migrated FH. */ | |
899 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
900 | ||
901 | nfs_free_fattr(fattr); | |
902 | return error; | |
903 | } | |
904 | EXPORT_SYMBOL_GPL(nfs_probe_server); | |
905 | ||
54ceac45 DH |
906 | /* |
907 | * Copy useful information when duplicating a server record | |
908 | */ | |
fcf10398 | 909 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
910 | { |
911 | target->flags = source->flags; | |
356e76b8 CL |
912 | target->rsize = source->rsize; |
913 | target->wsize = source->wsize; | |
54ceac45 DH |
914 | target->acregmin = source->acregmin; |
915 | target->acregmax = source->acregmax; | |
916 | target->acdirmin = source->acdirmin; | |
917 | target->acdirmax = source->acdirmax; | |
918 | target->caps = source->caps; | |
2df54806 | 919 | target->options = source->options; |
0f5f49b8 | 920 | target->auth_info = source->auth_info; |
89a6814d | 921 | target->port = source->port; |
54ceac45 | 922 | } |
89d77c8f | 923 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 924 | |
fcf10398 | 925 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
926 | { |
927 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 928 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 929 | |
dc030858 | 930 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 931 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 932 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 933 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 934 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
935 | |
936 | } | |
89d77c8f | 937 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 938 | |
32e62b7c | 939 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 940 | { |
d3b4c9d7 | 941 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 942 | struct nfs_net *nn; |
d3b4c9d7 | 943 | |
4c03ae4a TM |
944 | if (clp == NULL) |
945 | return; | |
73ea666c | 946 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 947 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 948 | list_del_rcu(&server->client_link); |
4c03ae4a | 949 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 950 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 951 | list_del(&server->master_link); |
dc030858 | 952 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
953 | |
954 | synchronize_rcu(); | |
955 | } | |
32e62b7c | 956 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 957 | |
1c725118 BC |
958 | static DEFINE_IDA(s_sysfs_ids); |
959 | ||
54ceac45 DH |
960 | /* |
961 | * Allocate and initialise a server record | |
962 | */ | |
fcf10398 | 963 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
964 | { |
965 | struct nfs_server *server; | |
966 | ||
967 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
968 | if (!server) | |
969 | return NULL; | |
970 | ||
1c725118 BC |
971 | server->s_sysfs_id = ida_alloc(&s_sysfs_ids, GFP_KERNEL); |
972 | if (server->s_sysfs_id < 0) { | |
973 | kfree(server); | |
974 | return NULL; | |
975 | } | |
976 | ||
54ceac45 DH |
977 | server->client = server->client_acl = ERR_PTR(-EINVAL); |
978 | ||
979 | /* Zero out the NFS state stuff */ | |
980 | INIT_LIST_HEAD(&server->client_link); | |
981 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 982 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 983 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 984 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 985 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 986 | |
ef818a28 SD |
987 | atomic_set(&server->active, 0); |
988 | ||
54ceac45 DH |
989 | server->io_stats = nfs_alloc_iostats(); |
990 | if (!server->io_stats) { | |
991 | kfree(server); | |
992 | return NULL; | |
993 | } | |
994 | ||
7f08a335 TM |
995 | server->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; |
996 | ||
9157c31d | 997 | ida_init(&server->openowner_id); |
d2d7ce28 | 998 | ida_init(&server->lockowner_id); |
f7e8917a | 999 | pnfs_init_server(server); |
68ebf8fe | 1000 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 1001 | |
54ceac45 DH |
1002 | return server; |
1003 | } | |
89d77c8f | 1004 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 | 1005 | |
c1b967d0 AV |
1006 | static void delayed_free(struct rcu_head *p) |
1007 | { | |
1008 | struct nfs_server *server = container_of(p, struct nfs_server, rcu); | |
1009 | ||
1010 | nfs_free_iostats(server->io_stats); | |
1011 | kfree(server); | |
1012 | } | |
1013 | ||
54ceac45 DH |
1014 | /* |
1015 | * Free up a server record | |
1016 | */ | |
1017 | void nfs_free_server(struct nfs_server *server) | |
1018 | { | |
fca5238e | 1019 | nfs_server_remove_lists(server); |
54ceac45 DH |
1020 | |
1021 | if (server->destroy != NULL) | |
1022 | server->destroy(server); | |
5cef338b TM |
1023 | |
1024 | if (!IS_ERR(server->client_acl)) | |
1025 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1026 | if (!IS_ERR(server->client)) |
1027 | rpc_shutdown_client(server->client); | |
1028 | ||
1029 | nfs_put_client(server->nfs_client); | |
1030 | ||
e901f17b BC |
1031 | if (server->kobj.state_initialized) { |
1032 | nfs_sysfs_remove_server(server); | |
1033 | kobject_put(&server->kobj); | |
1034 | } | |
1c725118 BC |
1035 | ida_free(&s_sysfs_ids, server->s_sysfs_id); |
1036 | ||
d2d7ce28 | 1037 | ida_destroy(&server->lockowner_id); |
9157c31d | 1038 | ida_destroy(&server->openowner_id); |
1a58e8a0 | 1039 | put_cred(server->cred); |
54ceac45 | 1040 | nfs_release_automount_timer(); |
c1b967d0 | 1041 | call_rcu(&server->rcu, delayed_free); |
54ceac45 | 1042 | } |
89d77c8f | 1043 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
1044 | |
1045 | /* | |
1046 | * Create a version 2 or 3 volume record | |
1047 | * - keyed on server and FSID | |
1048 | */ | |
62a55d08 | 1049 | struct nfs_server *nfs_create_server(struct fs_context *fc) |
54ceac45 | 1050 | { |
62a55d08 | 1051 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
54ceac45 | 1052 | struct nfs_server *server; |
fbca779a | 1053 | struct nfs_fattr *fattr; |
54ceac45 DH |
1054 | int error; |
1055 | ||
1056 | server = nfs_alloc_server(); | |
1057 | if (!server) | |
1058 | return ERR_PTR(-ENOMEM); | |
1059 | ||
d18a9d3f | 1060 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 1061 | |
fbca779a TM |
1062 | error = -ENOMEM; |
1063 | fattr = nfs_alloc_fattr(); | |
1064 | if (fattr == NULL) | |
1065 | goto error; | |
1066 | ||
54ceac45 | 1067 | /* Get a client representation */ |
62a55d08 | 1068 | error = nfs_init_server(server, fc); |
54ceac45 DH |
1069 | if (error < 0) |
1070 | goto error; | |
1071 | ||
54ceac45 | 1072 | /* Probe the root fh to retrieve its FSID */ |
62a55d08 | 1073 | error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); |
54ceac45 DH |
1074 | if (error < 0) |
1075 | goto error; | |
54af3bb5 TM |
1076 | if (server->nfs_client->rpc_ops->version == 3) { |
1077 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1078 | server->namelen = NFS3_MAXNAMLEN; | |
62a55d08 | 1079 | if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1080 | server->caps |= NFS_CAP_READDIRPLUS; |
1081 | } else { | |
1082 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1083 | server->namelen = NFS2_MAXNAMLEN; | |
1084 | } | |
1085 | ||
fbca779a | 1086 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
62a55d08 | 1087 | error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, |
2ef61e0e | 1088 | fattr, NULL); |
54ceac45 DH |
1089 | if (error < 0) { |
1090 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1091 | goto error; | |
1092 | } | |
1093 | } | |
fbca779a | 1094 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1095 | |
6daabf1b DH |
1096 | dprintk("Server FSID: %llx:%llx\n", |
1097 | (unsigned long long) server->fsid.major, | |
1098 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1099 | |
fca5238e | 1100 | nfs_server_insert_lists(server); |
54ceac45 | 1101 | server->mount_time = jiffies; |
fbca779a | 1102 | nfs_free_fattr(fattr); |
54ceac45 DH |
1103 | return server; |
1104 | ||
1105 | error: | |
fbca779a | 1106 | nfs_free_fattr(fattr); |
54ceac45 DH |
1107 | nfs_free_server(server); |
1108 | return ERR_PTR(error); | |
1109 | } | |
ddda8e0a | 1110 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1111 | |
54ceac45 DH |
1112 | /* |
1113 | * Clone an NFS2, NFS3 or NFS4 server record | |
1114 | */ | |
1115 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1116 | struct nfs_fh *fh, | |
7e6eb683 BS |
1117 | struct nfs_fattr *fattr, |
1118 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1119 | { |
1120 | struct nfs_server *server; | |
54ceac45 DH |
1121 | int error; |
1122 | ||
54ceac45 DH |
1123 | server = nfs_alloc_server(); |
1124 | if (!server) | |
1125 | return ERR_PTR(-ENOMEM); | |
1126 | ||
1a58e8a0 TM |
1127 | server->cred = get_cred(source->cred); |
1128 | ||
54ceac45 DH |
1129 | /* Copy data from the source */ |
1130 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1131 | server->destroy = source->destroy; |
212bf41d | 1132 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1133 | nfs_server_copy_userdata(server, source); |
1134 | ||
1135 | server->fsid = fattr->fsid; | |
1136 | ||
1c725118 BC |
1137 | nfs_sysfs_add_server(server); |
1138 | ||
e13b5493 BC |
1139 | nfs_sysfs_link_rpc_client(server, |
1140 | server->nfs_client->cl_rpcclient, "_state"); | |
1141 | ||
33170233 TM |
1142 | error = nfs_init_server_rpcclient(server, |
1143 | source->client->cl_timeout, | |
7e6eb683 | 1144 | flavor); |
54ceac45 DH |
1145 | if (error < 0) |
1146 | goto out_free_server; | |
54ceac45 DH |
1147 | |
1148 | /* probe the filesystem info for this server filesystem */ | |
4d4cf8d2 | 1149 | error = nfs_probe_server(server, fh); |
54ceac45 DH |
1150 | if (error < 0) |
1151 | goto out_free_server; | |
1152 | ||
54af3bb5 TM |
1153 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1154 | server->namelen = NFS4_MAXNAMLEN; | |
1155 | ||
54ceac45 DH |
1156 | error = nfs_start_lockd(server); |
1157 | if (error < 0) | |
1158 | goto out_free_server; | |
1159 | ||
fca5238e | 1160 | nfs_server_insert_lists(server); |
54ceac45 DH |
1161 | server->mount_time = jiffies; |
1162 | ||
54ceac45 DH |
1163 | return server; |
1164 | ||
1165 | out_free_server: | |
1166 | nfs_free_server(server); | |
54ceac45 DH |
1167 | return ERR_PTR(error); |
1168 | } | |
ddda8e0a | 1169 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1170 | |
6b13168b SK |
1171 | void nfs_clients_init(struct net *net) |
1172 | { | |
1173 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1174 | ||
1175 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1176 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1177 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1178 | idr_init(&nn->cb_ident_idr); |
1179 | #endif | |
4c03ae4a | 1180 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1181 | nn->boot_time = ktime_get_real(); |
1548036e JB |
1182 | memset(&nn->rpcstats, 0, sizeof(nn->rpcstats)); |
1183 | nn->rpcstats.program = &nfs_program; | |
bf11fbdb TM |
1184 | |
1185 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1186 | } |
1187 | ||
10b7a70c TM |
1188 | void nfs_clients_exit(struct net *net) |
1189 | { | |
1190 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1191 | ||
bf11fbdb | 1192 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1193 | nfs_cleanup_cb_ident_idr(net); |
1194 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1195 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1196 | } | |
1197 | ||
6aaca566 | 1198 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1199 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1200 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1201 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1202 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1203 | ||
88e9d34c | 1204 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1205 | .start = nfs_server_list_start, |
1206 | .next = nfs_server_list_next, | |
1207 | .stop = nfs_server_list_stop, | |
1208 | .show = nfs_server_list_show, | |
1209 | }; | |
1210 | ||
6aaca566 DH |
1211 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1212 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1213 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1214 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1215 | ||
88e9d34c | 1216 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1217 | .start = nfs_volume_list_start, |
1218 | .next = nfs_volume_list_next, | |
1219 | .stop = nfs_volume_list_stop, | |
1220 | .show = nfs_volume_list_show, | |
1221 | }; | |
1222 | ||
6aaca566 DH |
1223 | /* |
1224 | * set up the iterator to start reading from the server list and return the first item | |
1225 | */ | |
1226 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1227 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1228 | { |
65b38851 | 1229 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1230 | |
6aaca566 | 1231 | /* lock the list against modification */ |
dc030858 | 1232 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1233 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1234 | } |
1235 | ||
1236 | /* | |
1237 | * move to next server | |
1238 | */ | |
1239 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1240 | { | |
65b38851 | 1241 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1242 | |
1243 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1244 | } |
1245 | ||
1246 | /* | |
1247 | * clean up after reading from the transports list | |
1248 | */ | |
1249 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1250 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1251 | { |
65b38851 | 1252 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1253 | |
1254 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1255 | } |
1256 | ||
1257 | /* | |
1258 | * display a header line followed by a load of call lines | |
1259 | */ | |
1260 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1261 | { | |
1262 | struct nfs_client *clp; | |
65b38851 | 1263 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1264 | |
1265 | /* display header on line 1 */ | |
6b13168b | 1266 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1267 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /* display one transport per line on subsequent lines */ | |
1272 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1273 | ||
940aab49 MN |
1274 | /* Check if the client is initialized */ |
1275 | if (clp->cl_cons_state != NFS_CS_READY) | |
1276 | return 0; | |
1277 | ||
2446ab60 | 1278 | rcu_read_lock(); |
5d8515ca | 1279 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1280 | clp->rpc_ops->version, |
5d8515ca CL |
1281 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1282 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1283 | refcount_read(&clp->cl_count), |
6aaca566 | 1284 | clp->cl_hostname); |
2446ab60 | 1285 | rcu_read_unlock(); |
6aaca566 DH |
1286 | |
1287 | return 0; | |
1288 | } | |
1289 | ||
6aaca566 DH |
1290 | /* |
1291 | * set up the iterator to start reading from the volume list and return the first item | |
1292 | */ | |
1293 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1294 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1295 | { |
65b38851 | 1296 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1297 | |
6aaca566 | 1298 | /* lock the list against modification */ |
dc030858 | 1299 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1300 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1301 | } |
1302 | ||
1303 | /* | |
1304 | * move to next volume | |
1305 | */ | |
1306 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1307 | { | |
65b38851 | 1308 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1309 | |
1310 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1311 | } |
1312 | ||
1313 | /* | |
1314 | * clean up after reading from the transports list | |
1315 | */ | |
1316 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1317 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1318 | { |
65b38851 | 1319 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1320 | |
1321 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1322 | } |
1323 | ||
1324 | /* | |
1325 | * display a header line followed by a load of call lines | |
1326 | */ | |
1327 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1328 | { | |
1329 | struct nfs_server *server; | |
1330 | struct nfs_client *clp; | |
df05a49f KM |
1331 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1332 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1333 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1334 | |
1335 | /* display header on line 1 */ | |
c25d32b2 | 1336 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1337 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1338 | " FSC\n"); | |
6aaca566 DH |
1339 | return 0; |
1340 | } | |
1341 | /* display one transport per line on subsequent lines */ | |
1342 | server = list_entry(v, struct nfs_server, master_link); | |
1343 | clp = server->nfs_client; | |
1344 | ||
df05a49f | 1345 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1346 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1347 | ||
df05a49f | 1348 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1349 | (unsigned long long) server->fsid.major, |
1350 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1351 | |
2446ab60 | 1352 | rcu_read_lock(); |
df05a49f | 1353 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1354 | clp->rpc_ops->version, |
5d8515ca CL |
1355 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1356 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1357 | dev, |
5d1acff1 DH |
1358 | fsid, |
1359 | nfs_server_fscache_state(server)); | |
2446ab60 | 1360 | rcu_read_unlock(); |
6aaca566 DH |
1361 | |
1362 | return 0; | |
1363 | } | |
1364 | ||
65b38851 EB |
1365 | int nfs_fs_proc_net_init(struct net *net) |
1366 | { | |
1367 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1368 | struct proc_dir_entry *p; | |
1369 | ||
1370 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1371 | if (!nn->proc_nfsfs) | |
1372 | goto error_0; | |
1373 | ||
1374 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1375 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1376 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1377 | if (!p) |
1378 | goto error_1; | |
1379 | ||
1380 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1381 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1382 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1383 | if (!p) |
21e81002 | 1384 | goto error_1; |
65b38851 EB |
1385 | return 0; |
1386 | ||
65b38851 | 1387 | error_1: |
21e81002 | 1388 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1389 | error_0: |
1390 | return -ENOMEM; | |
1391 | } | |
1392 | ||
1393 | void nfs_fs_proc_net_exit(struct net *net) | |
1394 | { | |
21e81002 | 1395 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1396 | } |
1397 | ||
6aaca566 DH |
1398 | /* |
1399 | * initialise the /proc/fs/nfsfs/ directory | |
1400 | */ | |
1401 | int __init nfs_fs_proc_init(void) | |
1402 | { | |
6a062a36 | 1403 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1404 | goto error_0; |
1405 | ||
6aaca566 | 1406 | /* a file of servers with which we're dealing */ |
6a062a36 | 1407 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1408 | goto error_1; |
1409 | ||
6aaca566 | 1410 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1411 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1412 | goto error_1; | |
6aaca566 | 1413 | |
6a062a36 | 1414 | return 0; |
6aaca566 | 1415 | error_1: |
6a062a36 | 1416 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1417 | error_0: |
1418 | return -ENOMEM; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * clean up the /proc/fs/nfsfs/ directory | |
1423 | */ | |
1424 | void nfs_fs_proc_exit(void) | |
1425 | { | |
6a062a36 | 1426 | remove_proc_subtree("fs/nfsfs", NULL); |
1c725118 | 1427 | ida_destroy(&s_sysfs_ids); |
6aaca566 DH |
1428 | } |
1429 | ||
1430 | #endif /* CONFIG_PROC_FS */ |