Commit | Line | Data |
---|---|---|
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, | |
76 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 77 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
78 | }; |
79 | ||
80 | struct rpc_stat nfs_rpcstat = { | |
81 | .program = &nfs_program | |
82 | }; | |
83 | ||
ab7017a3 BS |
84 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
85 | { | |
86 | struct nfs_subversion *nfs; | |
87 | spin_lock(&nfs_version_lock); | |
88 | ||
89 | list_for_each_entry(nfs, &nfs_versions, list) { | |
90 | if (nfs->rpc_ops->version == version) { | |
91 | spin_unlock(&nfs_version_lock); | |
92 | return nfs; | |
93 | } | |
ee34e136 | 94 | } |
ab7017a3 BS |
95 | |
96 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 97 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
98 | } |
99 | ||
100 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
101 | { | |
102 | struct nfs_subversion *nfs = find_nfs_version(version); | |
103 | ||
104 | if (IS_ERR(nfs)) { | |
105 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 106 | request_module("nfsv%d", version); |
ab7017a3 BS |
107 | nfs = find_nfs_version(version); |
108 | mutex_unlock(&nfs_version_mutex); | |
109 | } | |
110 | ||
1f70ef96 AK |
111 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
112 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
113 | return nfs; |
114 | } | |
115 | ||
116 | void put_nfs_version(struct nfs_subversion *nfs) | |
117 | { | |
118 | module_put(nfs->owner); | |
119 | } | |
120 | ||
121 | void register_nfs_version(struct nfs_subversion *nfs) | |
122 | { | |
123 | spin_lock(&nfs_version_lock); | |
124 | ||
125 | list_add(&nfs->list, &nfs_versions); | |
126 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
127 | ||
128 | spin_unlock(&nfs_version_lock); | |
129 | } | |
130 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
131 | ||
132 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
133 | { | |
134 | spin_lock(&nfs_version_lock); | |
135 | ||
136 | nfs_version[nfs->rpc_ops->version] = NULL; | |
137 | list_del(&nfs->list); | |
138 | ||
139 | spin_unlock(&nfs_version_lock); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
142 | ||
24c8dbbb DH |
143 | /* |
144 | * Allocate a shared client record | |
145 | * | |
146 | * Since these are allocated/deallocated very rarely, we don't | |
147 | * bother putting them in a slab cache... | |
148 | */ | |
6663ee7f | 149 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
150 | { |
151 | struct nfs_client *clp; | |
a21bdd9b | 152 | int err = -ENOMEM; |
24c8dbbb DH |
153 | |
154 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
155 | goto error_0; | |
156 | ||
55dee1bc | 157 | clp->cl_minorversion = cl_init->minorversion; |
ab7017a3 | 158 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
159 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
160 | goto error_dealloc; | |
ab7017a3 BS |
161 | |
162 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 163 | |
212bf41d | 164 | refcount_set(&clp->cl_count, 1); |
24c8dbbb DH |
165 | clp->cl_cons_state = NFS_CS_INITING; |
166 | ||
6e4cffd7 CL |
167 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
168 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 169 | |
3a498026 | 170 | if (cl_init->hostname) { |
a21bdd9b | 171 | err = -ENOMEM; |
3a498026 | 172 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 173 | if (!clp->cl_hostname) |
71468513 | 174 | goto error_cleanup; |
24c8dbbb DH |
175 | } |
176 | ||
177 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
178 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
179 | ||
468d126d | 180 | clp->cl_flags = cl_init->init_flags; |
59dca3b2 | 181 | clp->cl_proto = cl_init->proto; |
6619079d | 182 | clp->cl_nconnect = cl_init->nconnect; |
7e134205 | 183 | clp->cl_max_connect = cl_init->max_connect ? cl_init->max_connect : 1; |
73ea666c | 184 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 185 | |
5e16923b | 186 | clp->cl_principal = "*"; |
6c0a8c5f | 187 | clp->cl_xprtsec = cl_init->xprtsec; |
24c8dbbb DH |
188 | return clp; |
189 | ||
71468513 | 190 | error_cleanup: |
ab7017a3 | 191 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 192 | error_dealloc: |
24c8dbbb DH |
193 | kfree(clp); |
194 | error_0: | |
a21bdd9b | 195 | return ERR_PTR(err); |
24c8dbbb | 196 | } |
ddda8e0a | 197 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 198 | |
89d77c8f | 199 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 200 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 201 | { |
28cd1b3f SK |
202 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
203 | ||
204 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
205 | } |
206 | ||
207 | /* nfs_client_lock held */ | |
208 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
209 | { | |
73ea666c | 210 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 211 | |
f4eecd5d | 212 | if (clp->cl_cb_ident) |
28cd1b3f | 213 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
214 | } |
215 | ||
f7e8917a FI |
216 | static void pnfs_init_server(struct nfs_server *server) |
217 | { | |
218 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
219 | } | |
220 | ||
888ef2e3 | 221 | #else |
10b7a70c | 222 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
223 | { |
224 | } | |
225 | ||
226 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
227 | { | |
228 | } | |
f7e8917a FI |
229 | |
230 | static void pnfs_init_server(struct nfs_server *server) | |
231 | { | |
232 | } | |
233 | ||
888ef2e3 | 234 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 235 | |
24c8dbbb DH |
236 | /* |
237 | * Destroy a shared client record | |
238 | */ | |
cdb7eced | 239 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 240 | { |
24c8dbbb DH |
241 | /* -EIO all pending I/O */ |
242 | if (!IS_ERR(clp->cl_rpcclient)) | |
243 | rpc_shutdown_client(clp->cl_rpcclient); | |
244 | ||
73ea666c | 245 | put_net(clp->cl_net); |
ab7017a3 | 246 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 247 | kfree(clp->cl_hostname); |
f11b2a1c | 248 | kfree(clp->cl_acceptor); |
c1b967d0 | 249 | kfree_rcu(clp, rcu); |
24c8dbbb | 250 | } |
ddda8e0a | 251 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
252 | |
253 | /* | |
254 | * Release a reference to a shared client record | |
255 | */ | |
256 | void nfs_put_client(struct nfs_client *clp) | |
257 | { | |
dc030858 SK |
258 | struct nfs_net *nn; |
259 | ||
27ba8512 DH |
260 | if (!clp) |
261 | return; | |
262 | ||
73ea666c | 263 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 264 | |
212bf41d | 265 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 266 | list_del(&clp->cl_share_link); |
f4eecd5d | 267 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 268 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 269 | |
1fea73a8 | 270 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 271 | |
cdb7eced | 272 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
273 | } |
274 | } | |
16b374ca | 275 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 276 | |
24c8dbbb | 277 | /* |
c81468a1 TM |
278 | * Find an nfs_client on the list that matches the initialisation data |
279 | * that is supplied. | |
24c8dbbb | 280 | */ |
c81468a1 | 281 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
282 | { |
283 | struct nfs_client *clp; | |
cf0d7e7f | 284 | const struct sockaddr *sap = (struct sockaddr *)data->addr; |
6b13168b | 285 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 286 | int error; |
24c8dbbb | 287 | |
c156618e | 288 | again: |
6b13168b | 289 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 290 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
291 | /* Don't match clients that failed to initialise properly */ |
292 | if (clp->cl_cons_state < 0) | |
293 | continue; | |
294 | ||
c156618e SM |
295 | /* If a client is still initializing then we need to wait */ |
296 | if (clp->cl_cons_state > NFS_CS_READY) { | |
297 | refcount_inc(&clp->cl_count); | |
298 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 299 | error = nfs_wait_client_init_complete(clp); |
c156618e | 300 | nfs_put_client(clp); |
c260121a | 301 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
302 | if (error < 0) |
303 | return ERR_PTR(error); | |
c156618e SM |
304 | goto again; |
305 | } | |
306 | ||
c81468a1 | 307 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 308 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
309 | continue; |
310 | ||
59dca3b2 TM |
311 | if (clp->cl_proto != data->proto) |
312 | continue; | |
5aae4a9a BH |
313 | /* Match nfsv4 minorversion */ |
314 | if (clp->cl_minorversion != data->minorversion) | |
315 | continue; | |
52f98f1a TM |
316 | |
317 | /* Match request for a dedicated DS */ | |
318 | if (test_bit(NFS_CS_DS, &data->init_flags) != | |
319 | test_bit(NFS_CS_DS, &clp->cl_flags)) | |
320 | continue; | |
321 | ||
c81468a1 | 322 | /* Match the full socket address */ |
d8efa4e6 | 323 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 324 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
325 | if (IS_ERR(clp->cl_rpcclient) || |
326 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
327 | sap)) |
328 | continue; | |
c81468a1 | 329 | |
6c0a8c5f CL |
330 | /* Match the xprt security policy */ |
331 | if (clp->cl_xprtsec.policy != data->xprtsec.policy) | |
332 | continue; | |
333 | ||
212bf41d | 334 | refcount_inc(&clp->cl_count); |
c81468a1 | 335 | return clp; |
13bbc06a | 336 | } |
c81468a1 | 337 | return NULL; |
24c8dbbb DH |
338 | } |
339 | ||
a33e4b03 WAA |
340 | /* |
341 | * Return true if @clp is done initializing, false if still working on it. | |
342 | * | |
343 | * Use nfs_client_init_status to check if it was successful. | |
344 | */ | |
345 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 346 | { |
48d66b97 | 347 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 348 | } |
a33e4b03 WAA |
349 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
350 | ||
351 | /* | |
352 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
353 | * | |
354 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
355 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
356 | */ | |
357 | int nfs_client_init_status(const struct nfs_client *clp) | |
358 | { | |
359 | /* called without checking nfs_client_init_is_complete */ | |
360 | if (clp->cl_cons_state > NFS_CS_READY) { | |
361 | WARN_ON_ONCE(1); | |
362 | return -EINVAL; | |
363 | } | |
364 | return clp->cl_cons_state; | |
365 | } | |
366 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
367 | |
368 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
369 | { | |
370 | return wait_event_killable(nfs_client_active_wq, | |
371 | nfs_client_init_is_complete(clp)); | |
372 | } | |
89d77c8f | 373 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 374 | |
f411703a CL |
375 | /* |
376 | * Found an existing client. Make sure it's ready before returning. | |
377 | */ | |
378 | static struct nfs_client * | |
379 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
380 | struct nfs_client *clp) | |
381 | { | |
382 | int error; | |
383 | ||
4697bd5e | 384 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
385 | if (error < 0) { |
386 | nfs_put_client(clp); | |
387 | return ERR_PTR(-ERESTARTSYS); | |
388 | } | |
389 | ||
390 | if (clp->cl_cons_state < NFS_CS_READY) { | |
391 | error = clp->cl_cons_state; | |
392 | nfs_put_client(clp); | |
393 | return ERR_PTR(error); | |
394 | } | |
395 | ||
54ac471c | 396 | smp_rmb(); |
f411703a CL |
397 | return clp; |
398 | } | |
399 | ||
24c8dbbb DH |
400 | /* |
401 | * Look up a client by IP address and protocol version | |
402 | * - creates a new record if one doesn't yet exist | |
403 | */ | |
7d38de3f | 404 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
405 | { |
406 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 407 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 408 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 409 | |
31434f49 PT |
410 | if (cl_init->hostname == NULL) { |
411 | WARN_ON(1); | |
09226e83 | 412 | return ERR_PTR(-EINVAL); |
31434f49 PT |
413 | } |
414 | ||
24c8dbbb DH |
415 | /* see if the client already exists */ |
416 | do { | |
dc030858 | 417 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 418 | |
c81468a1 | 419 | clp = nfs_match_client(cl_init); |
f411703a CL |
420 | if (clp) { |
421 | spin_unlock(&nn->nfs_client_lock); | |
422 | if (new) | |
cdb7eced | 423 | new->rpc_ops->free_client(new); |
9f7761cf BC |
424 | if (IS_ERR(clp)) |
425 | return clp; | |
f411703a CL |
426 | return nfs_found_client(cl_init, clp); |
427 | } | |
8cab4c39 | 428 | if (new) { |
05f4c350 CL |
429 | list_add_tail(&new->cl_share_link, |
430 | &nn->nfs_client_list); | |
8cab4c39 | 431 | spin_unlock(&nn->nfs_client_lock); |
5c6e5b60 | 432 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 433 | } |
24c8dbbb | 434 | |
dc030858 | 435 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 436 | |
ab7017a3 | 437 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 438 | } while (!IS_ERR(new)); |
24c8dbbb | 439 | |
a21bdd9b | 440 | return new; |
24c8dbbb | 441 | } |
89d77c8f | 442 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
443 | |
444 | /* | |
445 | * Mark a server as ready or failed | |
446 | */ | |
76db6d95 | 447 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 448 | { |
54ac471c | 449 | smp_wmb(); |
24c8dbbb DH |
450 | clp->cl_cons_state = state; |
451 | wake_up_all(&nfs_client_active_wq); | |
452 | } | |
89d77c8f | 453 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
454 | |
455 | /* | |
456 | * Initialise the timeout values for a connection | |
457 | */ | |
fcf10398 | 458 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 459 | int timeo, int retrans) |
5006a76c DH |
460 | { |
461 | to->to_initval = timeo * HZ / 10; | |
462 | to->to_retries = retrans; | |
5006a76c DH |
463 | |
464 | switch (proto) { | |
0896a725 | 465 | case XPRT_TRANSPORT_TCP: |
c8407f2e | 466 | case XPRT_TRANSPORT_TCP_TLS: |
2cf7ff7a | 467 | case XPRT_TRANSPORT_RDMA: |
a956beda | 468 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 469 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 470 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 471 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
472 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
473 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
474 | to->to_increment = to->to_initval; | |
475 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
476 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
477 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
478 | if (to->to_maxval < to->to_initval) | |
479 | to->to_maxval = to->to_initval; | |
5006a76c DH |
480 | to->to_exponential = 0; |
481 | break; | |
0896a725 | 482 | case XPRT_TRANSPORT_UDP: |
a956beda | 483 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 484 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 485 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 486 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
487 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
488 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
489 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
490 | to->to_exponential = 1; | |
491 | break; | |
259875ef TM |
492 | default: |
493 | BUG(); | |
5006a76c DH |
494 | } |
495 | } | |
89d77c8f | 496 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
497 | |
498 | /* | |
499 | * Create an RPC client handle | |
500 | */ | |
428360d7 | 501 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 502 | const struct nfs_client_initdata *cl_init, |
428360d7 | 503 | rpc_authflavor_t flavor) |
5006a76c | 504 | { |
5006a76c | 505 | struct rpc_clnt *clnt = NULL; |
41877d20 | 506 | struct rpc_create_args args = { |
73ea666c | 507 | .net = clp->cl_net, |
59dca3b2 | 508 | .protocol = clp->cl_proto, |
6619079d | 509 | .nconnect = clp->cl_nconnect, |
41877d20 | 510 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 511 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 512 | .timeout = cl_init->timeparms, |
41877d20 | 513 | .servername = clp->cl_hostname, |
5c6e5b60 | 514 | .nodename = cl_init->nodename, |
41877d20 CL |
515 | .program = &nfs_program, |
516 | .version = clp->rpc_ops->version, | |
517 | .authflavor = flavor, | |
1a58e8a0 | 518 | .cred = cl_init->cred, |
c8407f2e | 519 | .xprtsec = cl_init->xprtsec, |
537935f7 TM |
520 | .connect_timeout = cl_init->connect_timeout, |
521 | .reconnect_timeout = cl_init->reconnect_timeout, | |
41877d20 | 522 | }; |
5006a76c | 523 | |
4bf590e0 | 524 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 525 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
526 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
527 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 528 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 529 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
530 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
531 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4b1b69ce TM |
532 | if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
533 | args.flags |= RPC_CLNT_CREATE_NOPING; | |
e6237b6f TM |
534 | if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
535 | args.flags |= RPC_CLNT_CREATE_REUSEPORT; | |
4a01b8a4 | 536 | |
5006a76c DH |
537 | if (!IS_ERR(clp->cl_rpcclient)) |
538 | return 0; | |
539 | ||
41877d20 | 540 | clnt = rpc_create(&args); |
5006a76c DH |
541 | if (IS_ERR(clnt)) { |
542 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 543 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
544 | return PTR_ERR(clnt); |
545 | } | |
546 | ||
5e16923b | 547 | clnt->cl_principal = clp->cl_principal; |
5006a76c | 548 | clp->cl_rpcclient = clnt; |
dc48e0ab | 549 | clnt->cl_max_connect = clp->cl_max_connect; |
5006a76c DH |
550 | return 0; |
551 | } | |
89d77c8f | 552 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
553 | |
554 | /* | |
555 | * Version 2 or 3 client destruction | |
556 | */ | |
557 | static void nfs_destroy_server(struct nfs_server *server) | |
558 | { | |
f259613a | 559 | if (server->nlm_host) |
9289e7f9 | 560 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
561 | } |
562 | ||
563 | /* | |
564 | * Version 2 or 3 lockd setup | |
565 | */ | |
566 | static int nfs_start_lockd(struct nfs_server *server) | |
567 | { | |
9289e7f9 CL |
568 | struct nlm_host *host; |
569 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
570 | struct nlmclnt_initdata nlm_init = { |
571 | .hostname = clp->cl_hostname, | |
572 | .address = (struct sockaddr *)&clp->cl_addr, | |
573 | .addrlen = clp->cl_addrlen, | |
883bb163 | 574 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
575 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
576 | 1 : 0, | |
73ea666c | 577 | .net = clp->cl_net, |
b1ece737 | 578 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
d18a9d3f | 579 | .cred = server->cred, |
883bb163 | 580 | }; |
54ceac45 | 581 | |
883bb163 | 582 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 583 | return 0; |
5eebde23 SJ |
584 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
585 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
586 | return 0; |
587 | ||
8a6e5deb TM |
588 | switch (clp->cl_proto) { |
589 | default: | |
590 | nlm_init.protocol = IPPROTO_TCP; | |
591 | break; | |
b24ee6c6 | 592 | #ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT |
8a6e5deb TM |
593 | case XPRT_TRANSPORT_UDP: |
594 | nlm_init.protocol = IPPROTO_UDP; | |
b24ee6c6 | 595 | #endif |
8a6e5deb TM |
596 | } |
597 | ||
883bb163 | 598 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
599 | if (IS_ERR(host)) |
600 | return PTR_ERR(host); | |
601 | ||
602 | server->nlm_host = host; | |
603 | server->destroy = nfs_destroy_server; | |
d97c0589 | 604 | nfs_sysfs_link_rpc_client(server, nlmclnt_rpc_clnt(host), NULL); |
9289e7f9 | 605 | return 0; |
54ceac45 DH |
606 | } |
607 | ||
54ceac45 DH |
608 | /* |
609 | * Create a general RPC client | |
610 | */ | |
fcf10398 | 611 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
612 | const struct rpc_timeout *timeo, |
613 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
614 | { |
615 | struct nfs_client *clp = server->nfs_client; | |
616 | ||
ba9b584c CL |
617 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
618 | pseudoflavour); | |
54ceac45 | 619 | if (IS_ERR(server->client)) { |
3110ff80 | 620 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
621 | return PTR_ERR(server->client); |
622 | } | |
623 | ||
33170233 TM |
624 | memcpy(&server->client->cl_timeout_default, |
625 | timeo, | |
626 | sizeof(server->client->cl_timeout_default)); | |
627 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 628 | server->client->cl_softrtry = 0; |
91a575e1 TM |
629 | if (server->flags & NFS_MOUNT_SOFTERR) |
630 | server->client->cl_softerr = 1; | |
54ceac45 DH |
631 | if (server->flags & NFS_MOUNT_SOFT) |
632 | server->client->cl_softrtry = 1; | |
633 | ||
e13b5493 | 634 | nfs_sysfs_link_rpc_client(server, server->client, NULL); |
54ceac45 DH |
635 | return 0; |
636 | } | |
89d77c8f | 637 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 638 | |
8cab4c39 CL |
639 | /** |
640 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
641 | * | |
642 | * @clp: nfs_client to initialise | |
5c6e5b60 | 643 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
644 | * |
645 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 646 | */ |
8cab4c39 | 647 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 648 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 649 | { |
54ceac45 DH |
650 | int error; |
651 | ||
2844b6ae AS |
652 | /* the client is already initialised */ |
653 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 654 | return clp; |
54ceac45 | 655 | |
54ceac45 DH |
656 | /* |
657 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
658 | * - RFC 2623, sec 2.3.2 | |
659 | */ | |
5c6e5b60 | 660 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
661 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
662 | if (error < 0) { | |
663 | nfs_put_client(clp); | |
664 | clp = ERR_PTR(error); | |
665 | } | |
8cab4c39 | 666 | return clp; |
54ceac45 | 667 | } |
ddda8e0a | 668 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
669 | |
670 | /* | |
671 | * Create a version 2 or 3 client | |
672 | */ | |
2283f8d6 | 673 | static int nfs_init_server(struct nfs_server *server, |
62a55d08 | 674 | const struct fs_context *fc) |
54ceac45 | 675 | { |
62a55d08 | 676 | const struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5c6e5b60 | 677 | struct rpc_timeout timeparms; |
3a498026 | 678 | struct nfs_client_initdata cl_init = { |
38465f5d | 679 | .hostname = ctx->nfs_server.hostname, |
cf0d7e7f | 680 | .addr = &ctx->nfs_server._address, |
38465f5d | 681 | .addrlen = ctx->nfs_server.addrlen, |
62a55d08 | 682 | .nfs_mod = ctx->nfs_mod, |
38465f5d | 683 | .proto = ctx->nfs_server.protocol, |
62a55d08 | 684 | .net = fc->net_ns, |
5c6e5b60 | 685 | .timeparms = &timeparms, |
1a58e8a0 | 686 | .cred = server->cred, |
38465f5d | 687 | .nconnect = ctx->nfs_server.nconnect, |
e6237b6f | 688 | .init_flags = (1UL << NFS_CS_REUSEPORT), |
c8407f2e | 689 | .xprtsec = ctx->xprtsec, |
3a498026 | 690 | }; |
54ceac45 | 691 | struct nfs_client *clp; |
3a498026 | 692 | int error; |
54ceac45 | 693 | |
38465f5d SM |
694 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
695 | ctx->timeo, ctx->retrans); | |
696 | if (ctx->flags & NFS_MOUNT_NORESVPORT) | |
4bf590e0 | 697 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
45a52a02 | 698 | |
54ceac45 | 699 | /* Allocate or find a client reference we can use */ |
7d38de3f | 700 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 701 | if (IS_ERR(clp)) |
54ceac45 | 702 | return PTR_ERR(clp); |
54ceac45 | 703 | |
54ceac45 | 704 | server->nfs_client = clp; |
1c725118 | 705 | nfs_sysfs_add_server(server); |
e13b5493 | 706 | nfs_sysfs_link_rpc_client(server, clp->cl_rpcclient, "_state"); |
54ceac45 DH |
707 | |
708 | /* Initialise the client representation from the mount data */ | |
38465f5d SM |
709 | server->flags = ctx->flags; |
710 | server->options = ctx->options; | |
ce62b114 TM |
711 | server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; |
712 | ||
713 | switch (clp->rpc_ops->version) { | |
714 | case 2: | |
715 | server->fattr_valid = NFS_ATTR_FATTR_V2; | |
716 | break; | |
717 | case 3: | |
718 | server->fattr_valid = NFS_ATTR_FATTR_V3; | |
719 | break; | |
720 | default: | |
721 | server->fattr_valid = NFS_ATTR_FATTR_V4; | |
722 | } | |
54ceac45 | 723 | |
38465f5d | 724 | if (ctx->rsize) |
940261a1 | 725 | server->rsize = nfs_io_size(ctx->rsize, clp->cl_proto); |
38465f5d | 726 | if (ctx->wsize) |
940261a1 | 727 | server->wsize = nfs_io_size(ctx->wsize, clp->cl_proto); |
54ceac45 | 728 | |
38465f5d SM |
729 | server->acregmin = ctx->acregmin * HZ; |
730 | server->acregmax = ctx->acregmax * HZ; | |
731 | server->acdirmin = ctx->acdirmin * HZ; | |
732 | server->acdirmax = ctx->acdirmax * HZ; | |
54ceac45 DH |
733 | |
734 | /* Start lockd here, before we might error out */ | |
735 | error = nfs_start_lockd(server); | |
736 | if (error < 0) | |
737 | goto error; | |
738 | ||
38465f5d SM |
739 | server->port = ctx->nfs_server.port; |
740 | server->auth_info = ctx->auth_info; | |
f22d6d79 | 741 | |
a3f73c27 | 742 | error = nfs_init_server_rpcclient(server, &timeparms, |
38465f5d | 743 | ctx->selected_flavor); |
54ceac45 DH |
744 | if (error < 0) |
745 | goto error; | |
746 | ||
3f8400d1 | 747 | /* Preserve the values of mount_server-related mount options */ |
38465f5d SM |
748 | if (ctx->mount_server.addrlen) { |
749 | memcpy(&server->mountd_address, &ctx->mount_server.address, | |
750 | ctx->mount_server.addrlen); | |
751 | server->mountd_addrlen = ctx->mount_server.addrlen; | |
3f8400d1 | 752 | } |
38465f5d SM |
753 | server->mountd_version = ctx->mount_server.version; |
754 | server->mountd_port = ctx->mount_server.port; | |
755 | server->mountd_protocol = ctx->mount_server.protocol; | |
3f8400d1 | 756 | |
38465f5d | 757 | server->namelen = ctx->namlen; |
54ceac45 DH |
758 | return 0; |
759 | ||
760 | error: | |
761 | server->nfs_client = NULL; | |
762 | nfs_put_client(clp); | |
54ceac45 DH |
763 | return error; |
764 | } | |
765 | ||
766 | /* | |
767 | * Load up the server record from information gained in an fsinfo record | |
768 | */ | |
738fd0f3 | 769 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 770 | struct nfs_fsinfo *fsinfo) |
54ceac45 | 771 | { |
940261a1 | 772 | struct nfs_client *clp = server->nfs_client; |
04a5da69 | 773 | unsigned long max_rpc_payload, raw_max_rpc_payload; |
54ceac45 DH |
774 | |
775 | /* Work out a lot of parameters */ | |
776 | if (server->rsize == 0) | |
940261a1 | 777 | server->rsize = nfs_io_size(fsinfo->rtpref, clp->cl_proto); |
54ceac45 | 778 | if (server->wsize == 0) |
940261a1 | 779 | server->wsize = nfs_io_size(fsinfo->wtpref, clp->cl_proto); |
54ceac45 DH |
780 | |
781 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
940261a1 | 782 | server->rsize = nfs_io_size(fsinfo->rtmax, clp->cl_proto); |
54ceac45 | 783 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) |
940261a1 | 784 | server->wsize = nfs_io_size(fsinfo->wtmax, clp->cl_proto); |
54ceac45 | 785 | |
04a5da69 FL |
786 | raw_max_rpc_payload = rpc_max_payload(server->client); |
787 | max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL); | |
788 | ||
54ceac45 DH |
789 | if (server->rsize > max_rpc_payload) |
790 | server->rsize = max_rpc_payload; | |
791 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
792 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 793 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 794 | |
54ceac45 DH |
795 | if (server->wsize > max_rpc_payload) |
796 | server->wsize = max_rpc_payload; | |
797 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
798 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 799 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 800 | |
54ceac45 DH |
801 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
802 | ||
803 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
1a34c8c9 TM |
804 | if (server->dtsize > NFS_MAX_FILE_IO_SIZE) |
805 | server->dtsize = NFS_MAX_FILE_IO_SIZE; | |
54ceac45 DH |
806 | if (server->dtsize > server->rsize) |
807 | server->dtsize = server->rsize; | |
808 | ||
809 | if (server->flags & NFS_MOUNT_NOAC) { | |
810 | server->acregmin = server->acregmax = 0; | |
811 | server->acdirmin = server->acdirmax = 0; | |
812 | } | |
813 | ||
814 | server->maxfilesize = fsinfo->maxfilesize; | |
815 | ||
6b96724e | 816 | server->time_delta = fsinfo->time_delta; |
7f08a335 | 817 | server->change_attr_type = fsinfo->change_attr_type; |
6b96724e | 818 | |
2a92ee92 | 819 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
820 | /* We're airborne Set socket buffersize */ |
821 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
04a5da69 FL |
822 | |
823 | #ifdef CONFIG_NFS_V4_2 | |
824 | /* | |
825 | * Defaults until limited by the session parameters. | |
826 | */ | |
827 | server->gxasize = min_t(unsigned int, raw_max_rpc_payload, | |
828 | XATTR_SIZE_MAX); | |
829 | server->sxasize = min_t(unsigned int, raw_max_rpc_payload, | |
830 | XATTR_SIZE_MAX); | |
831 | server->lxasize = min_t(unsigned int, raw_max_rpc_payload, | |
832 | nfs42_listxattr_xdrsize(XATTR_LIST_MAX)); | |
b78ef845 FL |
833 | |
834 | if (fsinfo->xattr_support) | |
835 | server->caps |= NFS_CAP_XATTR; | |
04a5da69 | 836 | #endif |
54ceac45 DH |
837 | } |
838 | ||
839 | /* | |
840 | * Probe filesystem information, including the FSID on v2/v3 | |
841 | */ | |
5fe1210d | 842 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
843 | { |
844 | struct nfs_fsinfo fsinfo; | |
845 | struct nfs_client *clp = server->nfs_client; | |
846 | int error; | |
847 | ||
54ceac45 DH |
848 | if (clp->rpc_ops->set_capabilities != NULL) { |
849 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
850 | if (error < 0) | |
4cbb9768 | 851 | return error; |
54ceac45 DH |
852 | } |
853 | ||
854 | fsinfo.fattr = fattr; | |
ca440c38 | 855 | fsinfo.nlayouttypes = 0; |
3132e49e | 856 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
857 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
858 | if (error < 0) | |
4cbb9768 | 859 | return error; |
54ceac45 | 860 | |
71f81e51 | 861 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
862 | |
863 | /* Get some general file system info */ | |
864 | if (server->namelen == 0) { | |
865 | struct nfs_pathconf pathinfo; | |
866 | ||
867 | pathinfo.fattr = fattr; | |
868 | nfs_fattr_init(fattr); | |
869 | ||
870 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
871 | server->namelen = pathinfo.max_namelen; | |
872 | } | |
873 | ||
1976b2b3 | 874 | if (clp->rpc_ops->discover_trunking != NULL && |
a43bf604 OK |
875 | (server->caps & NFS_CAP_FS_LOCATIONS && |
876 | (server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) { | |
1976b2b3 OK |
877 | error = clp->rpc_ops->discover_trunking(server, mntfh); |
878 | if (error < 0) | |
879 | return error; | |
880 | } | |
881 | ||
54ceac45 | 882 | return 0; |
54ceac45 DH |
883 | } |
884 | ||
e5731131 AS |
885 | /* |
886 | * Grab the destination's particulars, including lease expiry time. | |
887 | * | |
888 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
889 | * we have cached. | |
890 | */ | |
891 | int nfs_probe_server(struct nfs_server *server, struct nfs_fh *mntfh) | |
892 | { | |
893 | struct nfs_fattr *fattr; | |
894 | int error; | |
895 | ||
896 | fattr = nfs_alloc_fattr(); | |
897 | if (fattr == NULL) | |
898 | return -ENOMEM; | |
899 | ||
900 | /* Sanity: the probe won't work if the destination server | |
901 | * does not recognize the migrated FH. */ | |
902 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
903 | ||
904 | nfs_free_fattr(fattr); | |
905 | return error; | |
906 | } | |
907 | EXPORT_SYMBOL_GPL(nfs_probe_server); | |
908 | ||
54ceac45 DH |
909 | /* |
910 | * Copy useful information when duplicating a server record | |
911 | */ | |
fcf10398 | 912 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
913 | { |
914 | target->flags = source->flags; | |
356e76b8 CL |
915 | target->rsize = source->rsize; |
916 | target->wsize = source->wsize; | |
54ceac45 DH |
917 | target->acregmin = source->acregmin; |
918 | target->acregmax = source->acregmax; | |
919 | target->acdirmin = source->acdirmin; | |
920 | target->acdirmax = source->acdirmax; | |
921 | target->caps = source->caps; | |
2df54806 | 922 | target->options = source->options; |
0f5f49b8 | 923 | target->auth_info = source->auth_info; |
89a6814d | 924 | target->port = source->port; |
54ceac45 | 925 | } |
89d77c8f | 926 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 927 | |
fcf10398 | 928 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
929 | { |
930 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 931 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 932 | |
dc030858 | 933 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 934 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 935 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 936 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 937 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
938 | |
939 | } | |
89d77c8f | 940 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 941 | |
32e62b7c | 942 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 943 | { |
d3b4c9d7 | 944 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 945 | struct nfs_net *nn; |
d3b4c9d7 | 946 | |
4c03ae4a TM |
947 | if (clp == NULL) |
948 | return; | |
73ea666c | 949 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 950 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 951 | list_del_rcu(&server->client_link); |
4c03ae4a | 952 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 953 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 954 | list_del(&server->master_link); |
dc030858 | 955 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
956 | |
957 | synchronize_rcu(); | |
958 | } | |
32e62b7c | 959 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 960 | |
1c725118 BC |
961 | static DEFINE_IDA(s_sysfs_ids); |
962 | ||
54ceac45 DH |
963 | /* |
964 | * Allocate and initialise a server record | |
965 | */ | |
fcf10398 | 966 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
967 | { |
968 | struct nfs_server *server; | |
969 | ||
970 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
971 | if (!server) | |
972 | return NULL; | |
973 | ||
1c725118 BC |
974 | server->s_sysfs_id = ida_alloc(&s_sysfs_ids, GFP_KERNEL); |
975 | if (server->s_sysfs_id < 0) { | |
976 | kfree(server); | |
977 | return NULL; | |
978 | } | |
979 | ||
54ceac45 DH |
980 | server->client = server->client_acl = ERR_PTR(-EINVAL); |
981 | ||
982 | /* Zero out the NFS state stuff */ | |
983 | INIT_LIST_HEAD(&server->client_link); | |
984 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 985 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 986 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 987 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 988 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 989 | |
ef818a28 SD |
990 | atomic_set(&server->active, 0); |
991 | ||
54ceac45 DH |
992 | server->io_stats = nfs_alloc_iostats(); |
993 | if (!server->io_stats) { | |
994 | kfree(server); | |
995 | return NULL; | |
996 | } | |
997 | ||
7f08a335 TM |
998 | server->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; |
999 | ||
9157c31d | 1000 | ida_init(&server->openowner_id); |
d2d7ce28 | 1001 | ida_init(&server->lockowner_id); |
f7e8917a | 1002 | pnfs_init_server(server); |
68ebf8fe | 1003 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 1004 | |
54ceac45 DH |
1005 | return server; |
1006 | } | |
89d77c8f | 1007 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 | 1008 | |
c1b967d0 AV |
1009 | static void delayed_free(struct rcu_head *p) |
1010 | { | |
1011 | struct nfs_server *server = container_of(p, struct nfs_server, rcu); | |
1012 | ||
1013 | nfs_free_iostats(server->io_stats); | |
1014 | kfree(server); | |
1015 | } | |
1016 | ||
54ceac45 DH |
1017 | /* |
1018 | * Free up a server record | |
1019 | */ | |
1020 | void nfs_free_server(struct nfs_server *server) | |
1021 | { | |
fca5238e | 1022 | nfs_server_remove_lists(server); |
54ceac45 DH |
1023 | |
1024 | if (server->destroy != NULL) | |
1025 | server->destroy(server); | |
5cef338b TM |
1026 | |
1027 | if (!IS_ERR(server->client_acl)) | |
1028 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1029 | if (!IS_ERR(server->client)) |
1030 | rpc_shutdown_client(server->client); | |
1031 | ||
1032 | nfs_put_client(server->nfs_client); | |
1033 | ||
e901f17b BC |
1034 | if (server->kobj.state_initialized) { |
1035 | nfs_sysfs_remove_server(server); | |
1036 | kobject_put(&server->kobj); | |
1037 | } | |
1c725118 BC |
1038 | ida_free(&s_sysfs_ids, server->s_sysfs_id); |
1039 | ||
d2d7ce28 | 1040 | ida_destroy(&server->lockowner_id); |
9157c31d | 1041 | ida_destroy(&server->openowner_id); |
1a58e8a0 | 1042 | put_cred(server->cred); |
54ceac45 | 1043 | nfs_release_automount_timer(); |
c1b967d0 | 1044 | call_rcu(&server->rcu, delayed_free); |
54ceac45 | 1045 | } |
89d77c8f | 1046 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
1047 | |
1048 | /* | |
1049 | * Create a version 2 or 3 volume record | |
1050 | * - keyed on server and FSID | |
1051 | */ | |
62a55d08 | 1052 | struct nfs_server *nfs_create_server(struct fs_context *fc) |
54ceac45 | 1053 | { |
62a55d08 | 1054 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
54ceac45 | 1055 | struct nfs_server *server; |
fbca779a | 1056 | struct nfs_fattr *fattr; |
54ceac45 DH |
1057 | int error; |
1058 | ||
1059 | server = nfs_alloc_server(); | |
1060 | if (!server) | |
1061 | return ERR_PTR(-ENOMEM); | |
1062 | ||
d18a9d3f | 1063 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 1064 | |
fbca779a TM |
1065 | error = -ENOMEM; |
1066 | fattr = nfs_alloc_fattr(); | |
1067 | if (fattr == NULL) | |
1068 | goto error; | |
1069 | ||
54ceac45 | 1070 | /* Get a client representation */ |
62a55d08 | 1071 | error = nfs_init_server(server, fc); |
54ceac45 DH |
1072 | if (error < 0) |
1073 | goto error; | |
1074 | ||
54ceac45 | 1075 | /* Probe the root fh to retrieve its FSID */ |
62a55d08 | 1076 | error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); |
54ceac45 DH |
1077 | if (error < 0) |
1078 | goto error; | |
54af3bb5 TM |
1079 | if (server->nfs_client->rpc_ops->version == 3) { |
1080 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1081 | server->namelen = NFS3_MAXNAMLEN; | |
62a55d08 | 1082 | if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1083 | server->caps |= NFS_CAP_READDIRPLUS; |
1084 | } else { | |
1085 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1086 | server->namelen = NFS2_MAXNAMLEN; | |
1087 | } | |
1088 | ||
fbca779a | 1089 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
62a55d08 | 1090 | error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, |
2ef61e0e | 1091 | fattr, NULL); |
54ceac45 DH |
1092 | if (error < 0) { |
1093 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1094 | goto error; | |
1095 | } | |
1096 | } | |
fbca779a | 1097 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1098 | |
6daabf1b DH |
1099 | dprintk("Server FSID: %llx:%llx\n", |
1100 | (unsigned long long) server->fsid.major, | |
1101 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1102 | |
fca5238e | 1103 | nfs_server_insert_lists(server); |
54ceac45 | 1104 | server->mount_time = jiffies; |
fbca779a | 1105 | nfs_free_fattr(fattr); |
54ceac45 DH |
1106 | return server; |
1107 | ||
1108 | error: | |
fbca779a | 1109 | nfs_free_fattr(fattr); |
54ceac45 DH |
1110 | nfs_free_server(server); |
1111 | return ERR_PTR(error); | |
1112 | } | |
ddda8e0a | 1113 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1114 | |
54ceac45 DH |
1115 | /* |
1116 | * Clone an NFS2, NFS3 or NFS4 server record | |
1117 | */ | |
1118 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1119 | struct nfs_fh *fh, | |
7e6eb683 BS |
1120 | struct nfs_fattr *fattr, |
1121 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1122 | { |
1123 | struct nfs_server *server; | |
54ceac45 DH |
1124 | int error; |
1125 | ||
54ceac45 DH |
1126 | server = nfs_alloc_server(); |
1127 | if (!server) | |
1128 | return ERR_PTR(-ENOMEM); | |
1129 | ||
1a58e8a0 TM |
1130 | server->cred = get_cred(source->cred); |
1131 | ||
54ceac45 DH |
1132 | /* Copy data from the source */ |
1133 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1134 | server->destroy = source->destroy; |
212bf41d | 1135 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1136 | nfs_server_copy_userdata(server, source); |
1137 | ||
1138 | server->fsid = fattr->fsid; | |
1139 | ||
1c725118 BC |
1140 | nfs_sysfs_add_server(server); |
1141 | ||
e13b5493 BC |
1142 | nfs_sysfs_link_rpc_client(server, |
1143 | server->nfs_client->cl_rpcclient, "_state"); | |
1144 | ||
33170233 TM |
1145 | error = nfs_init_server_rpcclient(server, |
1146 | source->client->cl_timeout, | |
7e6eb683 | 1147 | flavor); |
54ceac45 DH |
1148 | if (error < 0) |
1149 | goto out_free_server; | |
54ceac45 DH |
1150 | |
1151 | /* probe the filesystem info for this server filesystem */ | |
4d4cf8d2 | 1152 | error = nfs_probe_server(server, fh); |
54ceac45 DH |
1153 | if (error < 0) |
1154 | goto out_free_server; | |
1155 | ||
54af3bb5 TM |
1156 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1157 | server->namelen = NFS4_MAXNAMLEN; | |
1158 | ||
54ceac45 DH |
1159 | error = nfs_start_lockd(server); |
1160 | if (error < 0) | |
1161 | goto out_free_server; | |
1162 | ||
fca5238e | 1163 | nfs_server_insert_lists(server); |
54ceac45 DH |
1164 | server->mount_time = jiffies; |
1165 | ||
54ceac45 DH |
1166 | return server; |
1167 | ||
1168 | out_free_server: | |
1169 | nfs_free_server(server); | |
54ceac45 DH |
1170 | return ERR_PTR(error); |
1171 | } | |
ddda8e0a | 1172 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1173 | |
6b13168b SK |
1174 | void nfs_clients_init(struct net *net) |
1175 | { | |
1176 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1177 | ||
1178 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1179 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1180 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1181 | idr_init(&nn->cb_ident_idr); |
1182 | #endif | |
4c03ae4a | 1183 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1184 | nn->boot_time = ktime_get_real(); |
bf11fbdb TM |
1185 | |
1186 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1187 | } |
1188 | ||
10b7a70c TM |
1189 | void nfs_clients_exit(struct net *net) |
1190 | { | |
1191 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1192 | ||
bf11fbdb | 1193 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1194 | nfs_cleanup_cb_ident_idr(net); |
1195 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1196 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1197 | } | |
1198 | ||
6aaca566 | 1199 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1200 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1201 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1202 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1203 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1204 | ||
88e9d34c | 1205 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1206 | .start = nfs_server_list_start, |
1207 | .next = nfs_server_list_next, | |
1208 | .stop = nfs_server_list_stop, | |
1209 | .show = nfs_server_list_show, | |
1210 | }; | |
1211 | ||
6aaca566 DH |
1212 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1213 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1214 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1215 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1216 | ||
88e9d34c | 1217 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1218 | .start = nfs_volume_list_start, |
1219 | .next = nfs_volume_list_next, | |
1220 | .stop = nfs_volume_list_stop, | |
1221 | .show = nfs_volume_list_show, | |
1222 | }; | |
1223 | ||
6aaca566 DH |
1224 | /* |
1225 | * set up the iterator to start reading from the server list and return the first item | |
1226 | */ | |
1227 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1228 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1229 | { |
65b38851 | 1230 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1231 | |
6aaca566 | 1232 | /* lock the list against modification */ |
dc030858 | 1233 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1234 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * move to next server | |
1239 | */ | |
1240 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1241 | { | |
65b38851 | 1242 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1243 | |
1244 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1245 | } |
1246 | ||
1247 | /* | |
1248 | * clean up after reading from the transports list | |
1249 | */ | |
1250 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1251 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1252 | { |
65b38851 | 1253 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1254 | |
1255 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1256 | } |
1257 | ||
1258 | /* | |
1259 | * display a header line followed by a load of call lines | |
1260 | */ | |
1261 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1262 | { | |
1263 | struct nfs_client *clp; | |
65b38851 | 1264 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1265 | |
1266 | /* display header on line 1 */ | |
6b13168b | 1267 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1268 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | /* display one transport per line on subsequent lines */ | |
1273 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1274 | ||
940aab49 MN |
1275 | /* Check if the client is initialized */ |
1276 | if (clp->cl_cons_state != NFS_CS_READY) | |
1277 | return 0; | |
1278 | ||
2446ab60 | 1279 | rcu_read_lock(); |
5d8515ca | 1280 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1281 | clp->rpc_ops->version, |
5d8515ca CL |
1282 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1283 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1284 | refcount_read(&clp->cl_count), |
6aaca566 | 1285 | clp->cl_hostname); |
2446ab60 | 1286 | rcu_read_unlock(); |
6aaca566 DH |
1287 | |
1288 | return 0; | |
1289 | } | |
1290 | ||
6aaca566 DH |
1291 | /* |
1292 | * set up the iterator to start reading from the volume list and return the first item | |
1293 | */ | |
1294 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1295 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1296 | { |
65b38851 | 1297 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1298 | |
6aaca566 | 1299 | /* lock the list against modification */ |
dc030858 | 1300 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1301 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1302 | } |
1303 | ||
1304 | /* | |
1305 | * move to next volume | |
1306 | */ | |
1307 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1308 | { | |
65b38851 | 1309 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1310 | |
1311 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1312 | } |
1313 | ||
1314 | /* | |
1315 | * clean up after reading from the transports list | |
1316 | */ | |
1317 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1318 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1319 | { |
65b38851 | 1320 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1321 | |
1322 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1323 | } |
1324 | ||
1325 | /* | |
1326 | * display a header line followed by a load of call lines | |
1327 | */ | |
1328 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1329 | { | |
1330 | struct nfs_server *server; | |
1331 | struct nfs_client *clp; | |
df05a49f KM |
1332 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1333 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1334 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1335 | |
1336 | /* display header on line 1 */ | |
c25d32b2 | 1337 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1338 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1339 | " FSC\n"); | |
6aaca566 DH |
1340 | return 0; |
1341 | } | |
1342 | /* display one transport per line on subsequent lines */ | |
1343 | server = list_entry(v, struct nfs_server, master_link); | |
1344 | clp = server->nfs_client; | |
1345 | ||
df05a49f | 1346 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1347 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1348 | ||
df05a49f | 1349 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1350 | (unsigned long long) server->fsid.major, |
1351 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1352 | |
2446ab60 | 1353 | rcu_read_lock(); |
df05a49f | 1354 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1355 | clp->rpc_ops->version, |
5d8515ca CL |
1356 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1357 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1358 | dev, |
5d1acff1 DH |
1359 | fsid, |
1360 | nfs_server_fscache_state(server)); | |
2446ab60 | 1361 | rcu_read_unlock(); |
6aaca566 DH |
1362 | |
1363 | return 0; | |
1364 | } | |
1365 | ||
65b38851 EB |
1366 | int nfs_fs_proc_net_init(struct net *net) |
1367 | { | |
1368 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1369 | struct proc_dir_entry *p; | |
1370 | ||
1371 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1372 | if (!nn->proc_nfsfs) | |
1373 | goto error_0; | |
1374 | ||
1375 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1376 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1377 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1378 | if (!p) |
1379 | goto error_1; | |
1380 | ||
1381 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1382 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1383 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1384 | if (!p) |
21e81002 | 1385 | goto error_1; |
65b38851 EB |
1386 | return 0; |
1387 | ||
65b38851 | 1388 | error_1: |
21e81002 | 1389 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1390 | error_0: |
1391 | return -ENOMEM; | |
1392 | } | |
1393 | ||
1394 | void nfs_fs_proc_net_exit(struct net *net) | |
1395 | { | |
21e81002 | 1396 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1397 | } |
1398 | ||
6aaca566 DH |
1399 | /* |
1400 | * initialise the /proc/fs/nfsfs/ directory | |
1401 | */ | |
1402 | int __init nfs_fs_proc_init(void) | |
1403 | { | |
6a062a36 | 1404 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1405 | goto error_0; |
1406 | ||
6aaca566 | 1407 | /* a file of servers with which we're dealing */ |
6a062a36 | 1408 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1409 | goto error_1; |
1410 | ||
6aaca566 | 1411 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1412 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1413 | goto error_1; | |
6aaca566 | 1414 | |
6a062a36 | 1415 | return 0; |
6aaca566 | 1416 | error_1: |
6a062a36 | 1417 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1418 | error_0: |
1419 | return -ENOMEM; | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * clean up the /proc/fs/nfsfs/ directory | |
1424 | */ | |
1425 | void nfs_fs_proc_exit(void) | |
1426 | { | |
6a062a36 | 1427 | remove_proc_subtree("fs/nfsfs", NULL); |
1c725118 | 1428 | ida_destroy(&s_sysfs_ids); |
6aaca566 DH |
1429 | } |
1430 | ||
1431 | #endif /* CONFIG_PROC_FS */ |