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" |
24c8dbbb DH |
53 | |
54 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
55 | ||
24c8dbbb | 56 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
57 | static DEFINE_SPINLOCK(nfs_version_lock); |
58 | static DEFINE_MUTEX(nfs_version_mutex); | |
59 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 60 | |
5006a76c DH |
61 | /* |
62 | * RPC cruft for NFS | |
63 | */ | |
a613fa16 | 64 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
65 | [2] = NULL, |
66 | [3] = NULL, | |
67 | [4] = NULL, | |
5006a76c DH |
68 | }; |
69 | ||
a613fa16 | 70 | const struct rpc_program nfs_program = { |
5006a76c DH |
71 | .name = "nfs", |
72 | .number = NFS_PROGRAM, | |
73 | .nrvers = ARRAY_SIZE(nfs_version), | |
74 | .version = nfs_version, | |
75 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 76 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
77 | }; |
78 | ||
79 | struct rpc_stat nfs_rpcstat = { | |
80 | .program = &nfs_program | |
81 | }; | |
82 | ||
ab7017a3 BS |
83 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
84 | { | |
85 | struct nfs_subversion *nfs; | |
86 | spin_lock(&nfs_version_lock); | |
87 | ||
88 | list_for_each_entry(nfs, &nfs_versions, list) { | |
89 | if (nfs->rpc_ops->version == version) { | |
90 | spin_unlock(&nfs_version_lock); | |
91 | return nfs; | |
92 | } | |
ee34e136 | 93 | } |
ab7017a3 BS |
94 | |
95 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 96 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
97 | } |
98 | ||
99 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
100 | { | |
101 | struct nfs_subversion *nfs = find_nfs_version(version); | |
102 | ||
103 | if (IS_ERR(nfs)) { | |
104 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 105 | request_module("nfsv%d", version); |
ab7017a3 BS |
106 | nfs = find_nfs_version(version); |
107 | mutex_unlock(&nfs_version_mutex); | |
108 | } | |
109 | ||
1f70ef96 AK |
110 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
111 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
112 | return nfs; |
113 | } | |
114 | ||
115 | void put_nfs_version(struct nfs_subversion *nfs) | |
116 | { | |
117 | module_put(nfs->owner); | |
118 | } | |
119 | ||
120 | void register_nfs_version(struct nfs_subversion *nfs) | |
121 | { | |
122 | spin_lock(&nfs_version_lock); | |
123 | ||
124 | list_add(&nfs->list, &nfs_versions); | |
125 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
126 | ||
127 | spin_unlock(&nfs_version_lock); | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
130 | ||
131 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
132 | { | |
133 | spin_lock(&nfs_version_lock); | |
134 | ||
135 | nfs_version[nfs->rpc_ops->version] = NULL; | |
136 | list_del(&nfs->list); | |
137 | ||
138 | spin_unlock(&nfs_version_lock); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
141 | ||
24c8dbbb DH |
142 | /* |
143 | * Allocate a shared client record | |
144 | * | |
145 | * Since these are allocated/deallocated very rarely, we don't | |
146 | * bother putting them in a slab cache... | |
147 | */ | |
6663ee7f | 148 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
149 | { |
150 | struct nfs_client *clp; | |
a21bdd9b | 151 | int err = -ENOMEM; |
24c8dbbb DH |
152 | |
153 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
154 | goto error_0; | |
155 | ||
ab7017a3 | 156 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
157 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
158 | goto error_dealloc; | |
ab7017a3 BS |
159 | |
160 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 161 | |
212bf41d | 162 | refcount_set(&clp->cl_count, 1); |
24c8dbbb DH |
163 | clp->cl_cons_state = NFS_CS_INITING; |
164 | ||
6e4cffd7 CL |
165 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
166 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 167 | |
3a498026 | 168 | if (cl_init->hostname) { |
a21bdd9b | 169 | err = -ENOMEM; |
3a498026 | 170 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 171 | if (!clp->cl_hostname) |
71468513 | 172 | goto error_cleanup; |
24c8dbbb DH |
173 | } |
174 | ||
175 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
176 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
177 | ||
59dca3b2 | 178 | clp->cl_proto = cl_init->proto; |
6619079d | 179 | clp->cl_nconnect = cl_init->nconnect; |
73ea666c | 180 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 181 | |
5e16923b | 182 | clp->cl_principal = "*"; |
14727281 DH |
183 | nfs_fscache_get_client_cookie(clp); |
184 | ||
24c8dbbb DH |
185 | return clp; |
186 | ||
71468513 | 187 | error_cleanup: |
ab7017a3 | 188 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 189 | error_dealloc: |
24c8dbbb DH |
190 | kfree(clp); |
191 | error_0: | |
a21bdd9b | 192 | return ERR_PTR(err); |
24c8dbbb | 193 | } |
ddda8e0a | 194 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 195 | |
89d77c8f | 196 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 197 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 198 | { |
28cd1b3f SK |
199 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
200 | ||
201 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
202 | } |
203 | ||
204 | /* nfs_client_lock held */ | |
205 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
206 | { | |
73ea666c | 207 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 208 | |
f4eecd5d | 209 | if (clp->cl_cb_ident) |
28cd1b3f | 210 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
211 | } |
212 | ||
f7e8917a FI |
213 | static void pnfs_init_server(struct nfs_server *server) |
214 | { | |
215 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
216 | } | |
217 | ||
888ef2e3 | 218 | #else |
10b7a70c | 219 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
220 | { |
221 | } | |
222 | ||
223 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
224 | { | |
225 | } | |
f7e8917a FI |
226 | |
227 | static void pnfs_init_server(struct nfs_server *server) | |
228 | { | |
229 | } | |
230 | ||
888ef2e3 | 231 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 232 | |
24c8dbbb DH |
233 | /* |
234 | * Destroy a shared client record | |
235 | */ | |
cdb7eced | 236 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 237 | { |
14727281 DH |
238 | nfs_fscache_release_client_cookie(clp); |
239 | ||
24c8dbbb DH |
240 | /* -EIO all pending I/O */ |
241 | if (!IS_ERR(clp->cl_rpcclient)) | |
242 | rpc_shutdown_client(clp->cl_rpcclient); | |
243 | ||
73ea666c | 244 | put_net(clp->cl_net); |
ab7017a3 | 245 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 246 | kfree(clp->cl_hostname); |
f11b2a1c | 247 | kfree(clp->cl_acceptor); |
24c8dbbb | 248 | kfree(clp); |
24c8dbbb | 249 | } |
ddda8e0a | 250 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
251 | |
252 | /* | |
253 | * Release a reference to a shared client record | |
254 | */ | |
255 | void nfs_put_client(struct nfs_client *clp) | |
256 | { | |
dc030858 SK |
257 | struct nfs_net *nn; |
258 | ||
27ba8512 DH |
259 | if (!clp) |
260 | return; | |
261 | ||
73ea666c | 262 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 263 | |
212bf41d | 264 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 265 | list_del(&clp->cl_share_link); |
f4eecd5d | 266 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 267 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 268 | |
1fea73a8 | 269 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 270 | |
cdb7eced | 271 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
272 | } |
273 | } | |
16b374ca | 274 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 275 | |
24c8dbbb | 276 | /* |
c81468a1 TM |
277 | * Find an nfs_client on the list that matches the initialisation data |
278 | * that is supplied. | |
24c8dbbb | 279 | */ |
c81468a1 | 280 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
281 | { |
282 | struct nfs_client *clp; | |
d7371c41 | 283 | const struct sockaddr *sap = data->addr; |
6b13168b | 284 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 285 | int error; |
24c8dbbb | 286 | |
c156618e | 287 | again: |
6b13168b | 288 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 289 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
290 | /* Don't match clients that failed to initialise properly */ |
291 | if (clp->cl_cons_state < 0) | |
292 | continue; | |
293 | ||
c156618e SM |
294 | /* If a client is still initializing then we need to wait */ |
295 | if (clp->cl_cons_state > NFS_CS_READY) { | |
296 | refcount_inc(&clp->cl_count); | |
297 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 298 | error = nfs_wait_client_init_complete(clp); |
c156618e | 299 | nfs_put_client(clp); |
c260121a | 300 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
301 | if (error < 0) |
302 | return ERR_PTR(error); | |
c156618e SM |
303 | goto again; |
304 | } | |
305 | ||
c81468a1 | 306 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 307 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
308 | continue; |
309 | ||
59dca3b2 TM |
310 | if (clp->cl_proto != data->proto) |
311 | continue; | |
5aae4a9a BH |
312 | /* Match nfsv4 minorversion */ |
313 | if (clp->cl_minorversion != data->minorversion) | |
314 | continue; | |
c81468a1 | 315 | /* Match the full socket address */ |
d8efa4e6 | 316 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 317 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
318 | if (IS_ERR(clp->cl_rpcclient) || |
319 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
320 | sap)) |
321 | continue; | |
c81468a1 | 322 | |
212bf41d | 323 | refcount_inc(&clp->cl_count); |
c81468a1 | 324 | return clp; |
13bbc06a | 325 | } |
c81468a1 | 326 | return NULL; |
24c8dbbb DH |
327 | } |
328 | ||
a33e4b03 WAA |
329 | /* |
330 | * Return true if @clp is done initializing, false if still working on it. | |
331 | * | |
332 | * Use nfs_client_init_status to check if it was successful. | |
333 | */ | |
334 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 335 | { |
48d66b97 | 336 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 337 | } |
a33e4b03 WAA |
338 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
339 | ||
340 | /* | |
341 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
342 | * | |
343 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
344 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
345 | */ | |
346 | int nfs_client_init_status(const struct nfs_client *clp) | |
347 | { | |
348 | /* called without checking nfs_client_init_is_complete */ | |
349 | if (clp->cl_cons_state > NFS_CS_READY) { | |
350 | WARN_ON_ONCE(1); | |
351 | return -EINVAL; | |
352 | } | |
353 | return clp->cl_cons_state; | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
356 | |
357 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
358 | { | |
359 | return wait_event_killable(nfs_client_active_wq, | |
360 | nfs_client_init_is_complete(clp)); | |
361 | } | |
89d77c8f | 362 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 363 | |
f411703a CL |
364 | /* |
365 | * Found an existing client. Make sure it's ready before returning. | |
366 | */ | |
367 | static struct nfs_client * | |
368 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
369 | struct nfs_client *clp) | |
370 | { | |
371 | int error; | |
372 | ||
4697bd5e | 373 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
374 | if (error < 0) { |
375 | nfs_put_client(clp); | |
376 | return ERR_PTR(-ERESTARTSYS); | |
377 | } | |
378 | ||
379 | if (clp->cl_cons_state < NFS_CS_READY) { | |
380 | error = clp->cl_cons_state; | |
381 | nfs_put_client(clp); | |
382 | return ERR_PTR(error); | |
383 | } | |
384 | ||
54ac471c | 385 | smp_rmb(); |
f411703a CL |
386 | return clp; |
387 | } | |
388 | ||
24c8dbbb DH |
389 | /* |
390 | * Look up a client by IP address and protocol version | |
391 | * - creates a new record if one doesn't yet exist | |
392 | */ | |
7d38de3f | 393 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
394 | { |
395 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 396 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 397 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 398 | |
31434f49 PT |
399 | if (cl_init->hostname == NULL) { |
400 | WARN_ON(1); | |
401 | return NULL; | |
402 | } | |
403 | ||
24c8dbbb DH |
404 | /* see if the client already exists */ |
405 | do { | |
dc030858 | 406 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 407 | |
c81468a1 | 408 | clp = nfs_match_client(cl_init); |
f411703a CL |
409 | if (clp) { |
410 | spin_unlock(&nn->nfs_client_lock); | |
411 | if (new) | |
cdb7eced | 412 | new->rpc_ops->free_client(new); |
9f7761cf BC |
413 | if (IS_ERR(clp)) |
414 | return clp; | |
f411703a CL |
415 | return nfs_found_client(cl_init, clp); |
416 | } | |
8cab4c39 | 417 | if (new) { |
05f4c350 CL |
418 | list_add_tail(&new->cl_share_link, |
419 | &nn->nfs_client_list); | |
8cab4c39 | 420 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 421 | new->cl_flags = cl_init->init_flags; |
5c6e5b60 | 422 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 423 | } |
24c8dbbb | 424 | |
dc030858 | 425 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 426 | |
ab7017a3 | 427 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 428 | } while (!IS_ERR(new)); |
24c8dbbb | 429 | |
a21bdd9b | 430 | return new; |
24c8dbbb | 431 | } |
89d77c8f | 432 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
433 | |
434 | /* | |
435 | * Mark a server as ready or failed | |
436 | */ | |
76db6d95 | 437 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 438 | { |
54ac471c | 439 | smp_wmb(); |
24c8dbbb DH |
440 | clp->cl_cons_state = state; |
441 | wake_up_all(&nfs_client_active_wq); | |
442 | } | |
89d77c8f | 443 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
444 | |
445 | /* | |
446 | * Initialise the timeout values for a connection | |
447 | */ | |
fcf10398 | 448 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 449 | int timeo, int retrans) |
5006a76c DH |
450 | { |
451 | to->to_initval = timeo * HZ / 10; | |
452 | to->to_retries = retrans; | |
5006a76c DH |
453 | |
454 | switch (proto) { | |
0896a725 | 455 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 456 | case XPRT_TRANSPORT_RDMA: |
a956beda | 457 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 458 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 459 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 460 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
461 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
462 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
463 | to->to_increment = to->to_initval; | |
464 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
465 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
466 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
467 | if (to->to_maxval < to->to_initval) | |
468 | to->to_maxval = to->to_initval; | |
5006a76c DH |
469 | to->to_exponential = 0; |
470 | break; | |
0896a725 | 471 | case XPRT_TRANSPORT_UDP: |
a956beda | 472 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 473 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 474 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 475 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
476 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
477 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
478 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
479 | to->to_exponential = 1; | |
480 | break; | |
259875ef TM |
481 | default: |
482 | BUG(); | |
5006a76c DH |
483 | } |
484 | } | |
89d77c8f | 485 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
486 | |
487 | /* | |
488 | * Create an RPC client handle | |
489 | */ | |
428360d7 | 490 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 491 | const struct nfs_client_initdata *cl_init, |
428360d7 | 492 | rpc_authflavor_t flavor) |
5006a76c | 493 | { |
5006a76c | 494 | struct rpc_clnt *clnt = NULL; |
41877d20 | 495 | struct rpc_create_args args = { |
73ea666c | 496 | .net = clp->cl_net, |
59dca3b2 | 497 | .protocol = clp->cl_proto, |
6619079d | 498 | .nconnect = clp->cl_nconnect, |
41877d20 | 499 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 500 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 501 | .timeout = cl_init->timeparms, |
41877d20 | 502 | .servername = clp->cl_hostname, |
5c6e5b60 | 503 | .nodename = cl_init->nodename, |
41877d20 CL |
504 | .program = &nfs_program, |
505 | .version = clp->rpc_ops->version, | |
506 | .authflavor = flavor, | |
1a58e8a0 | 507 | .cred = cl_init->cred, |
41877d20 | 508 | }; |
5006a76c | 509 | |
4bf590e0 | 510 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 511 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
512 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
513 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 514 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 515 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
516 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
517 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4a01b8a4 | 518 | |
5006a76c DH |
519 | if (!IS_ERR(clp->cl_rpcclient)) |
520 | return 0; | |
521 | ||
41877d20 | 522 | clnt = rpc_create(&args); |
5006a76c DH |
523 | if (IS_ERR(clnt)) { |
524 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 525 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
526 | return PTR_ERR(clnt); |
527 | } | |
528 | ||
5e16923b | 529 | clnt->cl_principal = clp->cl_principal; |
5006a76c DH |
530 | clp->cl_rpcclient = clnt; |
531 | return 0; | |
532 | } | |
89d77c8f | 533 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
534 | |
535 | /* | |
536 | * Version 2 or 3 client destruction | |
537 | */ | |
538 | static void nfs_destroy_server(struct nfs_server *server) | |
539 | { | |
f259613a | 540 | if (server->nlm_host) |
9289e7f9 | 541 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
542 | } |
543 | ||
544 | /* | |
545 | * Version 2 or 3 lockd setup | |
546 | */ | |
547 | static int nfs_start_lockd(struct nfs_server *server) | |
548 | { | |
9289e7f9 CL |
549 | struct nlm_host *host; |
550 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
551 | struct nlmclnt_initdata nlm_init = { |
552 | .hostname = clp->cl_hostname, | |
553 | .address = (struct sockaddr *)&clp->cl_addr, | |
554 | .addrlen = clp->cl_addrlen, | |
883bb163 | 555 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
556 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
557 | 1 : 0, | |
73ea666c | 558 | .net = clp->cl_net, |
b1ece737 | 559 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
40373b12 | 560 | .cred = current_cred(), |
883bb163 | 561 | }; |
54ceac45 | 562 | |
883bb163 | 563 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 564 | return 0; |
5eebde23 SJ |
565 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
566 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
567 | return 0; |
568 | ||
8a6e5deb TM |
569 | switch (clp->cl_proto) { |
570 | default: | |
571 | nlm_init.protocol = IPPROTO_TCP; | |
572 | break; | |
573 | case XPRT_TRANSPORT_UDP: | |
574 | nlm_init.protocol = IPPROTO_UDP; | |
575 | } | |
576 | ||
883bb163 | 577 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
578 | if (IS_ERR(host)) |
579 | return PTR_ERR(host); | |
580 | ||
581 | server->nlm_host = host; | |
582 | server->destroy = nfs_destroy_server; | |
583 | return 0; | |
54ceac45 DH |
584 | } |
585 | ||
54ceac45 DH |
586 | /* |
587 | * Create a general RPC client | |
588 | */ | |
fcf10398 | 589 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
590 | const struct rpc_timeout *timeo, |
591 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
592 | { |
593 | struct nfs_client *clp = server->nfs_client; | |
594 | ||
ba9b584c CL |
595 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
596 | pseudoflavour); | |
54ceac45 | 597 | if (IS_ERR(server->client)) { |
3110ff80 | 598 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
599 | return PTR_ERR(server->client); |
600 | } | |
601 | ||
33170233 TM |
602 | memcpy(&server->client->cl_timeout_default, |
603 | timeo, | |
604 | sizeof(server->client->cl_timeout_default)); | |
605 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 606 | server->client->cl_softrtry = 0; |
91a575e1 TM |
607 | if (server->flags & NFS_MOUNT_SOFTERR) |
608 | server->client->cl_softerr = 1; | |
54ceac45 DH |
609 | if (server->flags & NFS_MOUNT_SOFT) |
610 | server->client->cl_softrtry = 1; | |
611 | ||
54ceac45 DH |
612 | return 0; |
613 | } | |
89d77c8f | 614 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 615 | |
8cab4c39 CL |
616 | /** |
617 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
618 | * | |
619 | * @clp: nfs_client to initialise | |
5c6e5b60 | 620 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
621 | * |
622 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 623 | */ |
8cab4c39 | 624 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 625 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 626 | { |
54ceac45 DH |
627 | int error; |
628 | ||
2844b6ae AS |
629 | /* the client is already initialised */ |
630 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 631 | return clp; |
54ceac45 | 632 | |
54ceac45 DH |
633 | /* |
634 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
635 | * - RFC 2623, sec 2.3.2 | |
636 | */ | |
5c6e5b60 | 637 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
638 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
639 | if (error < 0) { | |
640 | nfs_put_client(clp); | |
641 | clp = ERR_PTR(error); | |
642 | } | |
8cab4c39 | 643 | return clp; |
54ceac45 | 644 | } |
ddda8e0a | 645 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
646 | |
647 | /* | |
648 | * Create a version 2 or 3 client | |
649 | */ | |
2283f8d6 | 650 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
651 | const struct nfs_parsed_mount_data *data, |
652 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 653 | { |
5c6e5b60 | 654 | struct rpc_timeout timeparms; |
3a498026 TM |
655 | struct nfs_client_initdata cl_init = { |
656 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 657 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 658 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 659 | .nfs_mod = nfs_mod, |
59dca3b2 | 660 | .proto = data->nfs_server.protocol, |
e50a7a1a | 661 | .net = data->net, |
5c6e5b60 | 662 | .timeparms = &timeparms, |
1a58e8a0 | 663 | .cred = server->cred, |
53c32630 | 664 | .nconnect = data->nfs_server.nconnect, |
3a498026 | 665 | }; |
54ceac45 | 666 | struct nfs_client *clp; |
3a498026 | 667 | int error; |
54ceac45 | 668 | |
45a52a02 AA |
669 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
670 | data->timeo, data->retrans); | |
4bf590e0 CL |
671 | if (data->flags & NFS_MOUNT_NORESVPORT) |
672 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 673 | |
54ceac45 | 674 | /* Allocate or find a client reference we can use */ |
7d38de3f | 675 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 676 | if (IS_ERR(clp)) |
54ceac45 | 677 | return PTR_ERR(clp); |
54ceac45 | 678 | |
54ceac45 DH |
679 | server->nfs_client = clp; |
680 | ||
681 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 682 | server->flags = data->flags; |
b797cac7 | 683 | server->options = data->options; |
62ab460c TM |
684 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
685 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
cd812599 | 686 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; |
54ceac45 DH |
687 | |
688 | if (data->rsize) | |
689 | server->rsize = nfs_block_size(data->rsize, NULL); | |
690 | if (data->wsize) | |
691 | server->wsize = nfs_block_size(data->wsize, NULL); | |
692 | ||
693 | server->acregmin = data->acregmin * HZ; | |
694 | server->acregmax = data->acregmax * HZ; | |
695 | server->acdirmin = data->acdirmin * HZ; | |
696 | server->acdirmax = data->acdirmax * HZ; | |
697 | ||
698 | /* Start lockd here, before we might error out */ | |
699 | error = nfs_start_lockd(server); | |
700 | if (error < 0) | |
701 | goto error; | |
702 | ||
f22d6d79 | 703 | server->port = data->nfs_server.port; |
0f5f49b8 | 704 | server->auth_info = data->auth_info; |
f22d6d79 | 705 | |
a3f73c27 WAA |
706 | error = nfs_init_server_rpcclient(server, &timeparms, |
707 | data->selected_flavor); | |
54ceac45 DH |
708 | if (error < 0) |
709 | goto error; | |
710 | ||
3f8400d1 CL |
711 | /* Preserve the values of mount_server-related mount options */ |
712 | if (data->mount_server.addrlen) { | |
713 | memcpy(&server->mountd_address, &data->mount_server.address, | |
714 | data->mount_server.addrlen); | |
715 | server->mountd_addrlen = data->mount_server.addrlen; | |
716 | } | |
717 | server->mountd_version = data->mount_server.version; | |
718 | server->mountd_port = data->mount_server.port; | |
719 | server->mountd_protocol = data->mount_server.protocol; | |
720 | ||
54ceac45 | 721 | server->namelen = data->namlen; |
54ceac45 DH |
722 | return 0; |
723 | ||
724 | error: | |
725 | server->nfs_client = NULL; | |
726 | nfs_put_client(clp); | |
54ceac45 DH |
727 | return error; |
728 | } | |
729 | ||
730 | /* | |
731 | * Load up the server record from information gained in an fsinfo record | |
732 | */ | |
738fd0f3 | 733 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 734 | struct nfs_fsinfo *fsinfo) |
54ceac45 DH |
735 | { |
736 | unsigned long max_rpc_payload; | |
737 | ||
738 | /* Work out a lot of parameters */ | |
739 | if (server->rsize == 0) | |
740 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
741 | if (server->wsize == 0) | |
742 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
743 | ||
744 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
745 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
746 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
747 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
748 | ||
749 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
750 | if (server->rsize > max_rpc_payload) | |
751 | server->rsize = max_rpc_payload; | |
752 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
753 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 754 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 755 | |
54ceac45 DH |
756 | if (server->wsize > max_rpc_payload) |
757 | server->wsize = max_rpc_payload; | |
758 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
759 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 760 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 761 | |
54ceac45 DH |
762 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
763 | ||
764 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
09cbfeaf KS |
765 | if (server->dtsize > PAGE_SIZE * NFS_MAX_READDIR_PAGES) |
766 | server->dtsize = PAGE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
767 | if (server->dtsize > server->rsize) |
768 | server->dtsize = server->rsize; | |
769 | ||
770 | if (server->flags & NFS_MOUNT_NOAC) { | |
771 | server->acregmin = server->acregmax = 0; | |
772 | server->acdirmin = server->acdirmax = 0; | |
773 | } | |
774 | ||
775 | server->maxfilesize = fsinfo->maxfilesize; | |
776 | ||
6b96724e RL |
777 | server->time_delta = fsinfo->time_delta; |
778 | ||
2a92ee92 | 779 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
780 | /* We're airborne Set socket buffersize */ |
781 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
782 | } | |
783 | ||
784 | /* | |
785 | * Probe filesystem information, including the FSID on v2/v3 | |
786 | */ | |
fcf10398 | 787 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
788 | { |
789 | struct nfs_fsinfo fsinfo; | |
790 | struct nfs_client *clp = server->nfs_client; | |
791 | int error; | |
792 | ||
54ceac45 DH |
793 | if (clp->rpc_ops->set_capabilities != NULL) { |
794 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
795 | if (error < 0) | |
4cbb9768 | 796 | return error; |
54ceac45 DH |
797 | } |
798 | ||
799 | fsinfo.fattr = fattr; | |
ca440c38 | 800 | fsinfo.nlayouttypes = 0; |
3132e49e | 801 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
802 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
803 | if (error < 0) | |
4cbb9768 | 804 | return error; |
54ceac45 | 805 | |
71f81e51 | 806 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
807 | |
808 | /* Get some general file system info */ | |
809 | if (server->namelen == 0) { | |
810 | struct nfs_pathconf pathinfo; | |
811 | ||
812 | pathinfo.fattr = fattr; | |
813 | nfs_fattr_init(fattr); | |
814 | ||
815 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
816 | server->namelen = pathinfo.max_namelen; | |
817 | } | |
818 | ||
54ceac45 | 819 | return 0; |
54ceac45 | 820 | } |
89d77c8f | 821 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
822 | |
823 | /* | |
824 | * Copy useful information when duplicating a server record | |
825 | */ | |
fcf10398 | 826 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
827 | { |
828 | target->flags = source->flags; | |
356e76b8 CL |
829 | target->rsize = source->rsize; |
830 | target->wsize = source->wsize; | |
54ceac45 DH |
831 | target->acregmin = source->acregmin; |
832 | target->acregmax = source->acregmax; | |
833 | target->acdirmin = source->acdirmin; | |
834 | target->acdirmax = source->acdirmax; | |
835 | target->caps = source->caps; | |
2df54806 | 836 | target->options = source->options; |
0f5f49b8 | 837 | target->auth_info = source->auth_info; |
89a6814d | 838 | target->port = source->port; |
54ceac45 | 839 | } |
89d77c8f | 840 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 841 | |
fcf10398 | 842 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
843 | { |
844 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 845 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 846 | |
dc030858 | 847 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 848 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 849 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 850 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 851 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
852 | |
853 | } | |
89d77c8f | 854 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 855 | |
32e62b7c | 856 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 857 | { |
d3b4c9d7 | 858 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 859 | struct nfs_net *nn; |
d3b4c9d7 | 860 | |
4c03ae4a TM |
861 | if (clp == NULL) |
862 | return; | |
73ea666c | 863 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 864 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 865 | list_del_rcu(&server->client_link); |
4c03ae4a | 866 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 867 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 868 | list_del(&server->master_link); |
dc030858 | 869 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
870 | |
871 | synchronize_rcu(); | |
872 | } | |
32e62b7c | 873 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 874 | |
54ceac45 DH |
875 | /* |
876 | * Allocate and initialise a server record | |
877 | */ | |
fcf10398 | 878 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
879 | { |
880 | struct nfs_server *server; | |
881 | ||
882 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
883 | if (!server) | |
884 | return NULL; | |
885 | ||
886 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
887 | ||
888 | /* Zero out the NFS state stuff */ | |
889 | INIT_LIST_HEAD(&server->client_link); | |
890 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 891 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 892 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 893 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 894 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 895 | |
ef818a28 SD |
896 | atomic_set(&server->active, 0); |
897 | ||
54ceac45 DH |
898 | server->io_stats = nfs_alloc_iostats(); |
899 | if (!server->io_stats) { | |
900 | kfree(server); | |
901 | return NULL; | |
902 | } | |
903 | ||
9157c31d | 904 | ida_init(&server->openowner_id); |
d2d7ce28 | 905 | ida_init(&server->lockowner_id); |
f7e8917a | 906 | pnfs_init_server(server); |
68ebf8fe | 907 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 908 | |
54ceac45 DH |
909 | return server; |
910 | } | |
89d77c8f | 911 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
912 | |
913 | /* | |
914 | * Free up a server record | |
915 | */ | |
916 | void nfs_free_server(struct nfs_server *server) | |
917 | { | |
fca5238e | 918 | nfs_server_remove_lists(server); |
54ceac45 DH |
919 | |
920 | if (server->destroy != NULL) | |
921 | server->destroy(server); | |
5cef338b TM |
922 | |
923 | if (!IS_ERR(server->client_acl)) | |
924 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
925 | if (!IS_ERR(server->client)) |
926 | rpc_shutdown_client(server->client); | |
927 | ||
928 | nfs_put_client(server->nfs_client); | |
929 | ||
d2d7ce28 | 930 | ida_destroy(&server->lockowner_id); |
9157c31d | 931 | ida_destroy(&server->openowner_id); |
54ceac45 | 932 | nfs_free_iostats(server->io_stats); |
1a58e8a0 | 933 | put_cred(server->cred); |
54ceac45 DH |
934 | kfree(server); |
935 | nfs_release_automount_timer(); | |
54ceac45 | 936 | } |
89d77c8f | 937 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
938 | |
939 | /* | |
940 | * Create a version 2 or 3 volume record | |
941 | * - keyed on server and FSID | |
942 | */ | |
1179acc6 | 943 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 944 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
945 | { |
946 | struct nfs_server *server; | |
fbca779a | 947 | struct nfs_fattr *fattr; |
54ceac45 DH |
948 | int error; |
949 | ||
950 | server = nfs_alloc_server(); | |
951 | if (!server) | |
952 | return ERR_PTR(-ENOMEM); | |
953 | ||
1a58e8a0 TM |
954 | server->cred = get_cred(current_cred()); |
955 | ||
fbca779a TM |
956 | error = -ENOMEM; |
957 | fattr = nfs_alloc_fattr(); | |
958 | if (fattr == NULL) | |
959 | goto error; | |
960 | ||
54ceac45 | 961 | /* Get a client representation */ |
1179acc6 | 962 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
963 | if (error < 0) |
964 | goto error; | |
965 | ||
54ceac45 | 966 | /* Probe the root fh to retrieve its FSID */ |
1179acc6 | 967 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
968 | if (error < 0) |
969 | goto error; | |
54af3bb5 TM |
970 | if (server->nfs_client->rpc_ops->version == 3) { |
971 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
972 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 973 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
974 | server->caps |= NFS_CAP_READDIRPLUS; |
975 | } else { | |
976 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
977 | server->namelen = NFS2_MAXNAMLEN; | |
978 | } | |
979 | ||
fbca779a | 980 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
a841b54d TM |
981 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, |
982 | fattr, NULL, NULL); | |
54ceac45 DH |
983 | if (error < 0) { |
984 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
985 | goto error; | |
986 | } | |
987 | } | |
fbca779a | 988 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 989 | |
6daabf1b DH |
990 | dprintk("Server FSID: %llx:%llx\n", |
991 | (unsigned long long) server->fsid.major, | |
992 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 993 | |
fca5238e | 994 | nfs_server_insert_lists(server); |
54ceac45 | 995 | server->mount_time = jiffies; |
fbca779a | 996 | nfs_free_fattr(fattr); |
54ceac45 DH |
997 | return server; |
998 | ||
999 | error: | |
fbca779a | 1000 | nfs_free_fattr(fattr); |
54ceac45 DH |
1001 | nfs_free_server(server); |
1002 | return ERR_PTR(error); | |
1003 | } | |
ddda8e0a | 1004 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1005 | |
54ceac45 DH |
1006 | /* |
1007 | * Clone an NFS2, NFS3 or NFS4 server record | |
1008 | */ | |
1009 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1010 | struct nfs_fh *fh, | |
7e6eb683 BS |
1011 | struct nfs_fattr *fattr, |
1012 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1013 | { |
1014 | struct nfs_server *server; | |
fbca779a | 1015 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1016 | int error; |
1017 | ||
54ceac45 DH |
1018 | server = nfs_alloc_server(); |
1019 | if (!server) | |
1020 | return ERR_PTR(-ENOMEM); | |
1021 | ||
1a58e8a0 TM |
1022 | server->cred = get_cred(source->cred); |
1023 | ||
fbca779a TM |
1024 | error = -ENOMEM; |
1025 | fattr_fsinfo = nfs_alloc_fattr(); | |
1026 | if (fattr_fsinfo == NULL) | |
1027 | goto out_free_server; | |
1028 | ||
54ceac45 DH |
1029 | /* Copy data from the source */ |
1030 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1031 | server->destroy = source->destroy; |
212bf41d | 1032 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1033 | nfs_server_copy_userdata(server, source); |
1034 | ||
1035 | server->fsid = fattr->fsid; | |
1036 | ||
33170233 TM |
1037 | error = nfs_init_server_rpcclient(server, |
1038 | source->client->cl_timeout, | |
7e6eb683 | 1039 | flavor); |
54ceac45 DH |
1040 | if (error < 0) |
1041 | goto out_free_server; | |
54ceac45 DH |
1042 | |
1043 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1044 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1045 | if (error < 0) |
1046 | goto out_free_server; | |
1047 | ||
54af3bb5 TM |
1048 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1049 | server->namelen = NFS4_MAXNAMLEN; | |
1050 | ||
54ceac45 DH |
1051 | error = nfs_start_lockd(server); |
1052 | if (error < 0) | |
1053 | goto out_free_server; | |
1054 | ||
fca5238e | 1055 | nfs_server_insert_lists(server); |
54ceac45 DH |
1056 | server->mount_time = jiffies; |
1057 | ||
fbca779a | 1058 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1059 | return server; |
1060 | ||
1061 | out_free_server: | |
fbca779a | 1062 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 | 1063 | nfs_free_server(server); |
54ceac45 DH |
1064 | return ERR_PTR(error); |
1065 | } | |
ddda8e0a | 1066 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1067 | |
6b13168b SK |
1068 | void nfs_clients_init(struct net *net) |
1069 | { | |
1070 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1071 | ||
1072 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1073 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1074 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1075 | idr_init(&nn->cb_ident_idr); |
1076 | #endif | |
4c03ae4a | 1077 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1078 | nn->boot_time = ktime_get_real(); |
bf11fbdb TM |
1079 | |
1080 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1081 | } |
1082 | ||
10b7a70c TM |
1083 | void nfs_clients_exit(struct net *net) |
1084 | { | |
1085 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1086 | ||
bf11fbdb | 1087 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1088 | nfs_cleanup_cb_ident_idr(net); |
1089 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1090 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1091 | } | |
1092 | ||
6aaca566 | 1093 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1094 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1095 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1096 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1097 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1098 | ||
88e9d34c | 1099 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1100 | .start = nfs_server_list_start, |
1101 | .next = nfs_server_list_next, | |
1102 | .stop = nfs_server_list_stop, | |
1103 | .show = nfs_server_list_show, | |
1104 | }; | |
1105 | ||
6aaca566 DH |
1106 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1107 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1108 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1109 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1110 | ||
88e9d34c | 1111 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1112 | .start = nfs_volume_list_start, |
1113 | .next = nfs_volume_list_next, | |
1114 | .stop = nfs_volume_list_stop, | |
1115 | .show = nfs_volume_list_show, | |
1116 | }; | |
1117 | ||
6aaca566 DH |
1118 | /* |
1119 | * set up the iterator to start reading from the server list and return the first item | |
1120 | */ | |
1121 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1122 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1123 | { |
65b38851 | 1124 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1125 | |
6aaca566 | 1126 | /* lock the list against modification */ |
dc030858 | 1127 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1128 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1129 | } |
1130 | ||
1131 | /* | |
1132 | * move to next server | |
1133 | */ | |
1134 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1135 | { | |
65b38851 | 1136 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1137 | |
1138 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1139 | } |
1140 | ||
1141 | /* | |
1142 | * clean up after reading from the transports list | |
1143 | */ | |
1144 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1145 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1146 | { |
65b38851 | 1147 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1148 | |
1149 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1150 | } |
1151 | ||
1152 | /* | |
1153 | * display a header line followed by a load of call lines | |
1154 | */ | |
1155 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1156 | { | |
1157 | struct nfs_client *clp; | |
65b38851 | 1158 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1159 | |
1160 | /* display header on line 1 */ | |
6b13168b | 1161 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1162 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | /* display one transport per line on subsequent lines */ | |
1167 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1168 | ||
940aab49 MN |
1169 | /* Check if the client is initialized */ |
1170 | if (clp->cl_cons_state != NFS_CS_READY) | |
1171 | return 0; | |
1172 | ||
2446ab60 | 1173 | rcu_read_lock(); |
5d8515ca | 1174 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1175 | clp->rpc_ops->version, |
5d8515ca CL |
1176 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1177 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1178 | refcount_read(&clp->cl_count), |
6aaca566 | 1179 | clp->cl_hostname); |
2446ab60 | 1180 | rcu_read_unlock(); |
6aaca566 DH |
1181 | |
1182 | return 0; | |
1183 | } | |
1184 | ||
6aaca566 DH |
1185 | /* |
1186 | * set up the iterator to start reading from the volume list and return the first item | |
1187 | */ | |
1188 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1189 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1190 | { |
65b38851 | 1191 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1192 | |
6aaca566 | 1193 | /* lock the list against modification */ |
dc030858 | 1194 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1195 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1196 | } |
1197 | ||
1198 | /* | |
1199 | * move to next volume | |
1200 | */ | |
1201 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1202 | { | |
65b38851 | 1203 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1204 | |
1205 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1206 | } |
1207 | ||
1208 | /* | |
1209 | * clean up after reading from the transports list | |
1210 | */ | |
1211 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1212 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1213 | { |
65b38851 | 1214 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1215 | |
1216 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1217 | } |
1218 | ||
1219 | /* | |
1220 | * display a header line followed by a load of call lines | |
1221 | */ | |
1222 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1223 | { | |
1224 | struct nfs_server *server; | |
1225 | struct nfs_client *clp; | |
df05a49f KM |
1226 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1227 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1228 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1229 | |
1230 | /* display header on line 1 */ | |
c25d32b2 | 1231 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1232 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1233 | " FSC\n"); | |
6aaca566 DH |
1234 | return 0; |
1235 | } | |
1236 | /* display one transport per line on subsequent lines */ | |
1237 | server = list_entry(v, struct nfs_server, master_link); | |
1238 | clp = server->nfs_client; | |
1239 | ||
df05a49f | 1240 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1241 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1242 | ||
df05a49f | 1243 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1244 | (unsigned long long) server->fsid.major, |
1245 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1246 | |
2446ab60 | 1247 | rcu_read_lock(); |
df05a49f | 1248 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1249 | clp->rpc_ops->version, |
5d8515ca CL |
1250 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1251 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1252 | dev, |
5d1acff1 DH |
1253 | fsid, |
1254 | nfs_server_fscache_state(server)); | |
2446ab60 | 1255 | rcu_read_unlock(); |
6aaca566 DH |
1256 | |
1257 | return 0; | |
1258 | } | |
1259 | ||
65b38851 EB |
1260 | int nfs_fs_proc_net_init(struct net *net) |
1261 | { | |
1262 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1263 | struct proc_dir_entry *p; | |
1264 | ||
1265 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1266 | if (!nn->proc_nfsfs) | |
1267 | goto error_0; | |
1268 | ||
1269 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1270 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1271 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1272 | if (!p) |
1273 | goto error_1; | |
1274 | ||
1275 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1276 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1277 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1278 | if (!p) |
21e81002 | 1279 | goto error_1; |
65b38851 EB |
1280 | return 0; |
1281 | ||
65b38851 | 1282 | error_1: |
21e81002 | 1283 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1284 | error_0: |
1285 | return -ENOMEM; | |
1286 | } | |
1287 | ||
1288 | void nfs_fs_proc_net_exit(struct net *net) | |
1289 | { | |
21e81002 | 1290 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1291 | } |
1292 | ||
6aaca566 DH |
1293 | /* |
1294 | * initialise the /proc/fs/nfsfs/ directory | |
1295 | */ | |
1296 | int __init nfs_fs_proc_init(void) | |
1297 | { | |
6a062a36 | 1298 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1299 | goto error_0; |
1300 | ||
6aaca566 | 1301 | /* a file of servers with which we're dealing */ |
6a062a36 | 1302 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1303 | goto error_1; |
1304 | ||
6aaca566 | 1305 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1306 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1307 | goto error_1; | |
6aaca566 | 1308 | |
6a062a36 | 1309 | return 0; |
6aaca566 | 1310 | error_1: |
6a062a36 | 1311 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1312 | error_0: |
1313 | return -ENOMEM; | |
1314 | } | |
1315 | ||
1316 | /* | |
1317 | * clean up the /proc/fs/nfsfs/ directory | |
1318 | */ | |
1319 | void nfs_fs_proc_exit(void) | |
1320 | { | |
6a062a36 | 1321 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1322 | } |
1323 | ||
1324 | #endif /* CONFIG_PROC_FS */ |