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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
24c8dbbb DH |
2 | /* client.c: NFS client sharing and management code |
3 | * | |
4 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
24c8dbbb DH |
6 | */ |
7 | ||
8 | ||
24c8dbbb DH |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
e8edc6e0 | 11 | #include <linux/sched.h> |
24c8dbbb DH |
12 | #include <linux/time.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/unistd.h> | |
d8efa4e6 | 19 | #include <linux/sunrpc/addr.h> |
24c8dbbb DH |
20 | #include <linux/sunrpc/clnt.h> |
21 | #include <linux/sunrpc/stats.h> | |
22 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 23 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 24 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
25 | #include <linux/nfs_fs.h> |
26 | #include <linux/nfs_mount.h> | |
27 | #include <linux/nfs4_mount.h> | |
28 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
29 | #include <linux/seq_file.h> |
30 | #include <linux/mount.h> | |
24c8dbbb DH |
31 | #include <linux/vfs.h> |
32 | #include <linux/inet.h> | |
3b0d3f93 | 33 | #include <linux/in6.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
40401530 | 35 | #include <linux/idr.h> |
3b0d3f93 | 36 | #include <net/ipv6.h> |
24c8dbbb | 37 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 38 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
39 | #include <linux/nsproxy.h> |
40 | #include <linux/pid_namespace.h> | |
24c8dbbb | 41 | |
24c8dbbb DH |
42 | |
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
14727281 | 48 | #include "fscache.h" |
85e174ba | 49 | #include "pnfs.h" |
ab7017a3 | 50 | #include "nfs.h" |
6b13168b | 51 | #include "netns.h" |
bf11fbdb | 52 | #include "sysfs.h" |
04a5da69 | 53 | #include "nfs42.h" |
24c8dbbb DH |
54 | |
55 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
56 | ||
24c8dbbb | 57 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
58 | static DEFINE_SPINLOCK(nfs_version_lock); |
59 | static DEFINE_MUTEX(nfs_version_mutex); | |
60 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 61 | |
5006a76c DH |
62 | /* |
63 | * RPC cruft for NFS | |
64 | */ | |
a613fa16 | 65 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
66 | [2] = NULL, |
67 | [3] = NULL, | |
68 | [4] = NULL, | |
5006a76c DH |
69 | }; |
70 | ||
a613fa16 | 71 | const struct rpc_program nfs_program = { |
5006a76c DH |
72 | .name = "nfs", |
73 | .number = NFS_PROGRAM, | |
74 | .nrvers = ARRAY_SIZE(nfs_version), | |
75 | .version = nfs_version, | |
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 | ||
59dca3b2 | 180 | clp->cl_proto = cl_init->proto; |
6619079d | 181 | clp->cl_nconnect = cl_init->nconnect; |
73ea666c | 182 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 183 | |
5e16923b | 184 | clp->cl_principal = "*"; |
14727281 DH |
185 | nfs_fscache_get_client_cookie(clp); |
186 | ||
24c8dbbb DH |
187 | return clp; |
188 | ||
71468513 | 189 | error_cleanup: |
ab7017a3 | 190 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 191 | error_dealloc: |
24c8dbbb DH |
192 | kfree(clp); |
193 | error_0: | |
a21bdd9b | 194 | return ERR_PTR(err); |
24c8dbbb | 195 | } |
ddda8e0a | 196 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 197 | |
89d77c8f | 198 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 199 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 200 | { |
28cd1b3f SK |
201 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
202 | ||
203 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
204 | } |
205 | ||
206 | /* nfs_client_lock held */ | |
207 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
208 | { | |
73ea666c | 209 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 210 | |
f4eecd5d | 211 | if (clp->cl_cb_ident) |
28cd1b3f | 212 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
213 | } |
214 | ||
f7e8917a FI |
215 | static void pnfs_init_server(struct nfs_server *server) |
216 | { | |
217 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
218 | } | |
219 | ||
888ef2e3 | 220 | #else |
10b7a70c | 221 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
222 | { |
223 | } | |
224 | ||
225 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
226 | { | |
227 | } | |
f7e8917a FI |
228 | |
229 | static void pnfs_init_server(struct nfs_server *server) | |
230 | { | |
231 | } | |
232 | ||
888ef2e3 | 233 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 234 | |
24c8dbbb DH |
235 | /* |
236 | * Destroy a shared client record | |
237 | */ | |
cdb7eced | 238 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 239 | { |
14727281 DH |
240 | nfs_fscache_release_client_cookie(clp); |
241 | ||
24c8dbbb DH |
242 | /* -EIO all pending I/O */ |
243 | if (!IS_ERR(clp->cl_rpcclient)) | |
244 | rpc_shutdown_client(clp->cl_rpcclient); | |
245 | ||
73ea666c | 246 | put_net(clp->cl_net); |
ab7017a3 | 247 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 248 | kfree(clp->cl_hostname); |
f11b2a1c | 249 | kfree(clp->cl_acceptor); |
24c8dbbb | 250 | kfree(clp); |
24c8dbbb | 251 | } |
ddda8e0a | 252 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
253 | |
254 | /* | |
255 | * Release a reference to a shared client record | |
256 | */ | |
257 | void nfs_put_client(struct nfs_client *clp) | |
258 | { | |
dc030858 SK |
259 | struct nfs_net *nn; |
260 | ||
27ba8512 DH |
261 | if (!clp) |
262 | return; | |
263 | ||
73ea666c | 264 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 265 | |
212bf41d | 266 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 267 | list_del(&clp->cl_share_link); |
f4eecd5d | 268 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 269 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 270 | |
1fea73a8 | 271 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 272 | |
cdb7eced | 273 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
274 | } |
275 | } | |
16b374ca | 276 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 277 | |
24c8dbbb | 278 | /* |
c81468a1 TM |
279 | * Find an nfs_client on the list that matches the initialisation data |
280 | * that is supplied. | |
24c8dbbb | 281 | */ |
c81468a1 | 282 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
283 | { |
284 | struct nfs_client *clp; | |
d7371c41 | 285 | const struct sockaddr *sap = data->addr; |
6b13168b | 286 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 287 | int error; |
24c8dbbb | 288 | |
c156618e | 289 | again: |
6b13168b | 290 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 291 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
292 | /* Don't match clients that failed to initialise properly */ |
293 | if (clp->cl_cons_state < 0) | |
294 | continue; | |
295 | ||
c156618e SM |
296 | /* If a client is still initializing then we need to wait */ |
297 | if (clp->cl_cons_state > NFS_CS_READY) { | |
298 | refcount_inc(&clp->cl_count); | |
299 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 300 | error = nfs_wait_client_init_complete(clp); |
c156618e | 301 | nfs_put_client(clp); |
c260121a | 302 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
303 | if (error < 0) |
304 | return ERR_PTR(error); | |
c156618e SM |
305 | goto again; |
306 | } | |
307 | ||
c81468a1 | 308 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 309 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
310 | continue; |
311 | ||
59dca3b2 TM |
312 | if (clp->cl_proto != data->proto) |
313 | continue; | |
5aae4a9a BH |
314 | /* Match nfsv4 minorversion */ |
315 | if (clp->cl_minorversion != data->minorversion) | |
316 | continue; | |
52f98f1a TM |
317 | |
318 | /* Match request for a dedicated DS */ | |
319 | if (test_bit(NFS_CS_DS, &data->init_flags) != | |
320 | test_bit(NFS_CS_DS, &clp->cl_flags)) | |
321 | continue; | |
322 | ||
c81468a1 | 323 | /* Match the full socket address */ |
d8efa4e6 | 324 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 325 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
326 | if (IS_ERR(clp->cl_rpcclient) || |
327 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
328 | sap)) |
329 | continue; | |
c81468a1 | 330 | |
212bf41d | 331 | refcount_inc(&clp->cl_count); |
c81468a1 | 332 | return clp; |
13bbc06a | 333 | } |
c81468a1 | 334 | return NULL; |
24c8dbbb DH |
335 | } |
336 | ||
a33e4b03 WAA |
337 | /* |
338 | * Return true if @clp is done initializing, false if still working on it. | |
339 | * | |
340 | * Use nfs_client_init_status to check if it was successful. | |
341 | */ | |
342 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 343 | { |
48d66b97 | 344 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 345 | } |
a33e4b03 WAA |
346 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
347 | ||
348 | /* | |
349 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
350 | * | |
351 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
352 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
353 | */ | |
354 | int nfs_client_init_status(const struct nfs_client *clp) | |
355 | { | |
356 | /* called without checking nfs_client_init_is_complete */ | |
357 | if (clp->cl_cons_state > NFS_CS_READY) { | |
358 | WARN_ON_ONCE(1); | |
359 | return -EINVAL; | |
360 | } | |
361 | return clp->cl_cons_state; | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
364 | |
365 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
366 | { | |
367 | return wait_event_killable(nfs_client_active_wq, | |
368 | nfs_client_init_is_complete(clp)); | |
369 | } | |
89d77c8f | 370 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 371 | |
f411703a CL |
372 | /* |
373 | * Found an existing client. Make sure it's ready before returning. | |
374 | */ | |
375 | static struct nfs_client * | |
376 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
377 | struct nfs_client *clp) | |
378 | { | |
379 | int error; | |
380 | ||
4697bd5e | 381 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
382 | if (error < 0) { |
383 | nfs_put_client(clp); | |
384 | return ERR_PTR(-ERESTARTSYS); | |
385 | } | |
386 | ||
387 | if (clp->cl_cons_state < NFS_CS_READY) { | |
388 | error = clp->cl_cons_state; | |
389 | nfs_put_client(clp); | |
390 | return ERR_PTR(error); | |
391 | } | |
392 | ||
54ac471c | 393 | smp_rmb(); |
f411703a CL |
394 | return clp; |
395 | } | |
396 | ||
24c8dbbb DH |
397 | /* |
398 | * Look up a client by IP address and protocol version | |
399 | * - creates a new record if one doesn't yet exist | |
400 | */ | |
7d38de3f | 401 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
402 | { |
403 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 404 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 405 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 406 | |
31434f49 PT |
407 | if (cl_init->hostname == NULL) { |
408 | WARN_ON(1); | |
409 | return NULL; | |
410 | } | |
411 | ||
24c8dbbb DH |
412 | /* see if the client already exists */ |
413 | do { | |
dc030858 | 414 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 415 | |
c81468a1 | 416 | clp = nfs_match_client(cl_init); |
f411703a CL |
417 | if (clp) { |
418 | spin_unlock(&nn->nfs_client_lock); | |
419 | if (new) | |
cdb7eced | 420 | new->rpc_ops->free_client(new); |
9f7761cf BC |
421 | if (IS_ERR(clp)) |
422 | return clp; | |
f411703a CL |
423 | return nfs_found_client(cl_init, clp); |
424 | } | |
8cab4c39 | 425 | if (new) { |
05f4c350 CL |
426 | list_add_tail(&new->cl_share_link, |
427 | &nn->nfs_client_list); | |
8cab4c39 | 428 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 429 | new->cl_flags = cl_init->init_flags; |
5c6e5b60 | 430 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 431 | } |
24c8dbbb | 432 | |
dc030858 | 433 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 434 | |
ab7017a3 | 435 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 436 | } while (!IS_ERR(new)); |
24c8dbbb | 437 | |
a21bdd9b | 438 | return new; |
24c8dbbb | 439 | } |
89d77c8f | 440 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
441 | |
442 | /* | |
443 | * Mark a server as ready or failed | |
444 | */ | |
76db6d95 | 445 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 446 | { |
54ac471c | 447 | smp_wmb(); |
24c8dbbb DH |
448 | clp->cl_cons_state = state; |
449 | wake_up_all(&nfs_client_active_wq); | |
450 | } | |
89d77c8f | 451 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
452 | |
453 | /* | |
454 | * Initialise the timeout values for a connection | |
455 | */ | |
fcf10398 | 456 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 457 | int timeo, int retrans) |
5006a76c DH |
458 | { |
459 | to->to_initval = timeo * HZ / 10; | |
460 | to->to_retries = retrans; | |
5006a76c DH |
461 | |
462 | switch (proto) { | |
0896a725 | 463 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 464 | case XPRT_TRANSPORT_RDMA: |
a956beda | 465 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 466 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 467 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 468 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
469 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
470 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
471 | to->to_increment = to->to_initval; | |
472 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
473 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
474 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
475 | if (to->to_maxval < to->to_initval) | |
476 | to->to_maxval = to->to_initval; | |
5006a76c DH |
477 | to->to_exponential = 0; |
478 | break; | |
0896a725 | 479 | case XPRT_TRANSPORT_UDP: |
a956beda | 480 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 481 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 482 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 483 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
484 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
485 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
486 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
487 | to->to_exponential = 1; | |
488 | break; | |
259875ef TM |
489 | default: |
490 | BUG(); | |
5006a76c DH |
491 | } |
492 | } | |
89d77c8f | 493 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
494 | |
495 | /* | |
496 | * Create an RPC client handle | |
497 | */ | |
428360d7 | 498 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 499 | const struct nfs_client_initdata *cl_init, |
428360d7 | 500 | rpc_authflavor_t flavor) |
5006a76c | 501 | { |
5006a76c | 502 | struct rpc_clnt *clnt = NULL; |
41877d20 | 503 | struct rpc_create_args args = { |
73ea666c | 504 | .net = clp->cl_net, |
59dca3b2 | 505 | .protocol = clp->cl_proto, |
6619079d | 506 | .nconnect = clp->cl_nconnect, |
41877d20 | 507 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 508 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 509 | .timeout = cl_init->timeparms, |
41877d20 | 510 | .servername = clp->cl_hostname, |
5c6e5b60 | 511 | .nodename = cl_init->nodename, |
41877d20 CL |
512 | .program = &nfs_program, |
513 | .version = clp->rpc_ops->version, | |
514 | .authflavor = flavor, | |
1a58e8a0 | 515 | .cred = cl_init->cred, |
41877d20 | 516 | }; |
5006a76c | 517 | |
4bf590e0 | 518 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 519 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
520 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
521 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 522 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 523 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
524 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
525 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4b1b69ce TM |
526 | if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
527 | args.flags |= RPC_CLNT_CREATE_NOPING; | |
e6237b6f TM |
528 | if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
529 | args.flags |= RPC_CLNT_CREATE_REUSEPORT; | |
4a01b8a4 | 530 | |
5006a76c DH |
531 | if (!IS_ERR(clp->cl_rpcclient)) |
532 | return 0; | |
533 | ||
41877d20 | 534 | clnt = rpc_create(&args); |
5006a76c DH |
535 | if (IS_ERR(clnt)) { |
536 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 537 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
538 | return PTR_ERR(clnt); |
539 | } | |
540 | ||
5e16923b | 541 | clnt->cl_principal = clp->cl_principal; |
5006a76c DH |
542 | clp->cl_rpcclient = clnt; |
543 | return 0; | |
544 | } | |
89d77c8f | 545 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
546 | |
547 | /* | |
548 | * Version 2 or 3 client destruction | |
549 | */ | |
550 | static void nfs_destroy_server(struct nfs_server *server) | |
551 | { | |
f259613a | 552 | if (server->nlm_host) |
9289e7f9 | 553 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
554 | } |
555 | ||
556 | /* | |
557 | * Version 2 or 3 lockd setup | |
558 | */ | |
559 | static int nfs_start_lockd(struct nfs_server *server) | |
560 | { | |
9289e7f9 CL |
561 | struct nlm_host *host; |
562 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
563 | struct nlmclnt_initdata nlm_init = { |
564 | .hostname = clp->cl_hostname, | |
565 | .address = (struct sockaddr *)&clp->cl_addr, | |
566 | .addrlen = clp->cl_addrlen, | |
883bb163 | 567 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
568 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
569 | 1 : 0, | |
73ea666c | 570 | .net = clp->cl_net, |
b1ece737 | 571 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
d18a9d3f | 572 | .cred = server->cred, |
883bb163 | 573 | }; |
54ceac45 | 574 | |
883bb163 | 575 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 576 | return 0; |
5eebde23 SJ |
577 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
578 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
579 | return 0; |
580 | ||
8a6e5deb TM |
581 | switch (clp->cl_proto) { |
582 | default: | |
583 | nlm_init.protocol = IPPROTO_TCP; | |
584 | break; | |
b24ee6c6 | 585 | #ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT |
8a6e5deb TM |
586 | case XPRT_TRANSPORT_UDP: |
587 | nlm_init.protocol = IPPROTO_UDP; | |
b24ee6c6 | 588 | #endif |
8a6e5deb TM |
589 | } |
590 | ||
883bb163 | 591 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
592 | if (IS_ERR(host)) |
593 | return PTR_ERR(host); | |
594 | ||
595 | server->nlm_host = host; | |
596 | server->destroy = nfs_destroy_server; | |
597 | return 0; | |
54ceac45 DH |
598 | } |
599 | ||
54ceac45 DH |
600 | /* |
601 | * Create a general RPC client | |
602 | */ | |
fcf10398 | 603 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
604 | const struct rpc_timeout *timeo, |
605 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
606 | { |
607 | struct nfs_client *clp = server->nfs_client; | |
608 | ||
ba9b584c CL |
609 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
610 | pseudoflavour); | |
54ceac45 | 611 | if (IS_ERR(server->client)) { |
3110ff80 | 612 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
613 | return PTR_ERR(server->client); |
614 | } | |
615 | ||
33170233 TM |
616 | memcpy(&server->client->cl_timeout_default, |
617 | timeo, | |
618 | sizeof(server->client->cl_timeout_default)); | |
619 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 620 | server->client->cl_softrtry = 0; |
91a575e1 TM |
621 | if (server->flags & NFS_MOUNT_SOFTERR) |
622 | server->client->cl_softerr = 1; | |
54ceac45 DH |
623 | if (server->flags & NFS_MOUNT_SOFT) |
624 | server->client->cl_softrtry = 1; | |
625 | ||
54ceac45 DH |
626 | return 0; |
627 | } | |
89d77c8f | 628 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 629 | |
8cab4c39 CL |
630 | /** |
631 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
632 | * | |
633 | * @clp: nfs_client to initialise | |
5c6e5b60 | 634 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
635 | * |
636 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 637 | */ |
8cab4c39 | 638 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 639 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 640 | { |
54ceac45 DH |
641 | int error; |
642 | ||
2844b6ae AS |
643 | /* the client is already initialised */ |
644 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 645 | return clp; |
54ceac45 | 646 | |
54ceac45 DH |
647 | /* |
648 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
649 | * - RFC 2623, sec 2.3.2 | |
650 | */ | |
5c6e5b60 | 651 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
652 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
653 | if (error < 0) { | |
654 | nfs_put_client(clp); | |
655 | clp = ERR_PTR(error); | |
656 | } | |
8cab4c39 | 657 | return clp; |
54ceac45 | 658 | } |
ddda8e0a | 659 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
660 | |
661 | /* | |
662 | * Create a version 2 or 3 client | |
663 | */ | |
2283f8d6 | 664 | static int nfs_init_server(struct nfs_server *server, |
62a55d08 | 665 | const struct fs_context *fc) |
54ceac45 | 666 | { |
62a55d08 | 667 | const struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5c6e5b60 | 668 | struct rpc_timeout timeparms; |
3a498026 | 669 | struct nfs_client_initdata cl_init = { |
38465f5d SM |
670 | .hostname = ctx->nfs_server.hostname, |
671 | .addr = (const struct sockaddr *)&ctx->nfs_server.address, | |
672 | .addrlen = ctx->nfs_server.addrlen, | |
62a55d08 | 673 | .nfs_mod = ctx->nfs_mod, |
38465f5d | 674 | .proto = ctx->nfs_server.protocol, |
62a55d08 | 675 | .net = fc->net_ns, |
5c6e5b60 | 676 | .timeparms = &timeparms, |
1a58e8a0 | 677 | .cred = server->cred, |
38465f5d | 678 | .nconnect = ctx->nfs_server.nconnect, |
e6237b6f | 679 | .init_flags = (1UL << NFS_CS_REUSEPORT), |
3a498026 | 680 | }; |
54ceac45 | 681 | struct nfs_client *clp; |
3a498026 | 682 | int error; |
54ceac45 | 683 | |
38465f5d SM |
684 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
685 | ctx->timeo, ctx->retrans); | |
686 | if (ctx->flags & NFS_MOUNT_NORESVPORT) | |
4bf590e0 | 687 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
45a52a02 | 688 | |
54ceac45 | 689 | /* Allocate or find a client reference we can use */ |
7d38de3f | 690 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 691 | if (IS_ERR(clp)) |
54ceac45 | 692 | return PTR_ERR(clp); |
54ceac45 | 693 | |
54ceac45 DH |
694 | server->nfs_client = clp; |
695 | ||
696 | /* Initialise the client representation from the mount data */ | |
38465f5d SM |
697 | server->flags = ctx->flags; |
698 | server->options = ctx->options; | |
62ab460c TM |
699 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
700 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
cd812599 | 701 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; |
54ceac45 | 702 | |
38465f5d SM |
703 | if (ctx->rsize) |
704 | server->rsize = nfs_block_size(ctx->rsize, NULL); | |
705 | if (ctx->wsize) | |
706 | server->wsize = nfs_block_size(ctx->wsize, NULL); | |
54ceac45 | 707 | |
38465f5d SM |
708 | server->acregmin = ctx->acregmin * HZ; |
709 | server->acregmax = ctx->acregmax * HZ; | |
710 | server->acdirmin = ctx->acdirmin * HZ; | |
711 | server->acdirmax = ctx->acdirmax * HZ; | |
54ceac45 DH |
712 | |
713 | /* Start lockd here, before we might error out */ | |
714 | error = nfs_start_lockd(server); | |
715 | if (error < 0) | |
716 | goto error; | |
717 | ||
38465f5d SM |
718 | server->port = ctx->nfs_server.port; |
719 | server->auth_info = ctx->auth_info; | |
f22d6d79 | 720 | |
a3f73c27 | 721 | error = nfs_init_server_rpcclient(server, &timeparms, |
38465f5d | 722 | ctx->selected_flavor); |
54ceac45 DH |
723 | if (error < 0) |
724 | goto error; | |
725 | ||
3f8400d1 | 726 | /* Preserve the values of mount_server-related mount options */ |
38465f5d SM |
727 | if (ctx->mount_server.addrlen) { |
728 | memcpy(&server->mountd_address, &ctx->mount_server.address, | |
729 | ctx->mount_server.addrlen); | |
730 | server->mountd_addrlen = ctx->mount_server.addrlen; | |
3f8400d1 | 731 | } |
38465f5d SM |
732 | server->mountd_version = ctx->mount_server.version; |
733 | server->mountd_port = ctx->mount_server.port; | |
734 | server->mountd_protocol = ctx->mount_server.protocol; | |
3f8400d1 | 735 | |
38465f5d | 736 | server->namelen = ctx->namlen; |
54ceac45 DH |
737 | return 0; |
738 | ||
739 | error: | |
740 | server->nfs_client = NULL; | |
741 | nfs_put_client(clp); | |
54ceac45 DH |
742 | return error; |
743 | } | |
744 | ||
745 | /* | |
746 | * Load up the server record from information gained in an fsinfo record | |
747 | */ | |
738fd0f3 | 748 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 749 | struct nfs_fsinfo *fsinfo) |
54ceac45 | 750 | { |
04a5da69 | 751 | unsigned long max_rpc_payload, raw_max_rpc_payload; |
54ceac45 DH |
752 | |
753 | /* Work out a lot of parameters */ | |
754 | if (server->rsize == 0) | |
755 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
756 | if (server->wsize == 0) | |
757 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
758 | ||
759 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
760 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
761 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
762 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
763 | ||
04a5da69 FL |
764 | raw_max_rpc_payload = rpc_max_payload(server->client); |
765 | max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL); | |
766 | ||
54ceac45 DH |
767 | if (server->rsize > max_rpc_payload) |
768 | server->rsize = max_rpc_payload; | |
769 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
770 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 771 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 772 | |
54ceac45 DH |
773 | if (server->wsize > max_rpc_payload) |
774 | server->wsize = max_rpc_payload; | |
775 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
776 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 777 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 778 | |
54ceac45 DH |
779 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
780 | ||
781 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
1a34c8c9 TM |
782 | if (server->dtsize > NFS_MAX_FILE_IO_SIZE) |
783 | server->dtsize = NFS_MAX_FILE_IO_SIZE; | |
54ceac45 DH |
784 | if (server->dtsize > server->rsize) |
785 | server->dtsize = server->rsize; | |
786 | ||
787 | if (server->flags & NFS_MOUNT_NOAC) { | |
788 | server->acregmin = server->acregmax = 0; | |
789 | server->acdirmin = server->acdirmax = 0; | |
790 | } | |
791 | ||
792 | server->maxfilesize = fsinfo->maxfilesize; | |
793 | ||
6b96724e RL |
794 | server->time_delta = fsinfo->time_delta; |
795 | ||
2a92ee92 | 796 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
797 | /* We're airborne Set socket buffersize */ |
798 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
04a5da69 FL |
799 | |
800 | #ifdef CONFIG_NFS_V4_2 | |
801 | /* | |
802 | * Defaults until limited by the session parameters. | |
803 | */ | |
804 | server->gxasize = min_t(unsigned int, raw_max_rpc_payload, | |
805 | XATTR_SIZE_MAX); | |
806 | server->sxasize = min_t(unsigned int, raw_max_rpc_payload, | |
807 | XATTR_SIZE_MAX); | |
808 | server->lxasize = min_t(unsigned int, raw_max_rpc_payload, | |
809 | nfs42_listxattr_xdrsize(XATTR_LIST_MAX)); | |
b78ef845 FL |
810 | |
811 | if (fsinfo->xattr_support) | |
812 | server->caps |= NFS_CAP_XATTR; | |
04a5da69 | 813 | #endif |
54ceac45 DH |
814 | } |
815 | ||
816 | /* | |
817 | * Probe filesystem information, including the FSID on v2/v3 | |
818 | */ | |
fcf10398 | 819 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
820 | { |
821 | struct nfs_fsinfo fsinfo; | |
822 | struct nfs_client *clp = server->nfs_client; | |
823 | int error; | |
824 | ||
54ceac45 DH |
825 | if (clp->rpc_ops->set_capabilities != NULL) { |
826 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
827 | if (error < 0) | |
4cbb9768 | 828 | return error; |
54ceac45 DH |
829 | } |
830 | ||
831 | fsinfo.fattr = fattr; | |
ca440c38 | 832 | fsinfo.nlayouttypes = 0; |
3132e49e | 833 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
834 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
835 | if (error < 0) | |
4cbb9768 | 836 | return error; |
54ceac45 | 837 | |
71f81e51 | 838 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
839 | |
840 | /* Get some general file system info */ | |
841 | if (server->namelen == 0) { | |
842 | struct nfs_pathconf pathinfo; | |
843 | ||
844 | pathinfo.fattr = fattr; | |
845 | nfs_fattr_init(fattr); | |
846 | ||
847 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
848 | server->namelen = pathinfo.max_namelen; | |
849 | } | |
850 | ||
54ceac45 | 851 | return 0; |
54ceac45 | 852 | } |
89d77c8f | 853 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
854 | |
855 | /* | |
856 | * Copy useful information when duplicating a server record | |
857 | */ | |
fcf10398 | 858 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
859 | { |
860 | target->flags = source->flags; | |
356e76b8 CL |
861 | target->rsize = source->rsize; |
862 | target->wsize = source->wsize; | |
54ceac45 DH |
863 | target->acregmin = source->acregmin; |
864 | target->acregmax = source->acregmax; | |
865 | target->acdirmin = source->acdirmin; | |
866 | target->acdirmax = source->acdirmax; | |
867 | target->caps = source->caps; | |
2df54806 | 868 | target->options = source->options; |
0f5f49b8 | 869 | target->auth_info = source->auth_info; |
89a6814d | 870 | target->port = source->port; |
54ceac45 | 871 | } |
89d77c8f | 872 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 873 | |
fcf10398 | 874 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
875 | { |
876 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 877 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 878 | |
dc030858 | 879 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 880 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 881 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 882 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 883 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
884 | |
885 | } | |
89d77c8f | 886 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 887 | |
32e62b7c | 888 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 889 | { |
d3b4c9d7 | 890 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 891 | struct nfs_net *nn; |
d3b4c9d7 | 892 | |
4c03ae4a TM |
893 | if (clp == NULL) |
894 | return; | |
73ea666c | 895 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 896 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 897 | list_del_rcu(&server->client_link); |
4c03ae4a | 898 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 899 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 900 | list_del(&server->master_link); |
dc030858 | 901 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
902 | |
903 | synchronize_rcu(); | |
904 | } | |
32e62b7c | 905 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 906 | |
54ceac45 DH |
907 | /* |
908 | * Allocate and initialise a server record | |
909 | */ | |
fcf10398 | 910 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
911 | { |
912 | struct nfs_server *server; | |
913 | ||
914 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
915 | if (!server) | |
916 | return NULL; | |
917 | ||
918 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
919 | ||
920 | /* Zero out the NFS state stuff */ | |
921 | INIT_LIST_HEAD(&server->client_link); | |
922 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 923 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 924 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 925 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 926 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 927 | |
ef818a28 SD |
928 | atomic_set(&server->active, 0); |
929 | ||
54ceac45 DH |
930 | server->io_stats = nfs_alloc_iostats(); |
931 | if (!server->io_stats) { | |
932 | kfree(server); | |
933 | return NULL; | |
934 | } | |
935 | ||
9157c31d | 936 | ida_init(&server->openowner_id); |
d2d7ce28 | 937 | ida_init(&server->lockowner_id); |
f7e8917a | 938 | pnfs_init_server(server); |
68ebf8fe | 939 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 940 | |
54ceac45 DH |
941 | return server; |
942 | } | |
89d77c8f | 943 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
944 | |
945 | /* | |
946 | * Free up a server record | |
947 | */ | |
948 | void nfs_free_server(struct nfs_server *server) | |
949 | { | |
fca5238e | 950 | nfs_server_remove_lists(server); |
54ceac45 DH |
951 | |
952 | if (server->destroy != NULL) | |
953 | server->destroy(server); | |
5cef338b TM |
954 | |
955 | if (!IS_ERR(server->client_acl)) | |
956 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
957 | if (!IS_ERR(server->client)) |
958 | rpc_shutdown_client(server->client); | |
959 | ||
960 | nfs_put_client(server->nfs_client); | |
961 | ||
d2d7ce28 | 962 | ida_destroy(&server->lockowner_id); |
9157c31d | 963 | ida_destroy(&server->openowner_id); |
54ceac45 | 964 | nfs_free_iostats(server->io_stats); |
1a58e8a0 | 965 | put_cred(server->cred); |
54ceac45 DH |
966 | kfree(server); |
967 | nfs_release_automount_timer(); | |
54ceac45 | 968 | } |
89d77c8f | 969 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
970 | |
971 | /* | |
972 | * Create a version 2 or 3 volume record | |
973 | * - keyed on server and FSID | |
974 | */ | |
62a55d08 | 975 | struct nfs_server *nfs_create_server(struct fs_context *fc) |
54ceac45 | 976 | { |
62a55d08 | 977 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
54ceac45 | 978 | struct nfs_server *server; |
fbca779a | 979 | struct nfs_fattr *fattr; |
54ceac45 DH |
980 | int error; |
981 | ||
982 | server = nfs_alloc_server(); | |
983 | if (!server) | |
984 | return ERR_PTR(-ENOMEM); | |
985 | ||
d18a9d3f | 986 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 987 | |
fbca779a TM |
988 | error = -ENOMEM; |
989 | fattr = nfs_alloc_fattr(); | |
990 | if (fattr == NULL) | |
991 | goto error; | |
992 | ||
54ceac45 | 993 | /* Get a client representation */ |
62a55d08 | 994 | error = nfs_init_server(server, fc); |
54ceac45 DH |
995 | if (error < 0) |
996 | goto error; | |
997 | ||
54ceac45 | 998 | /* Probe the root fh to retrieve its FSID */ |
62a55d08 | 999 | error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); |
54ceac45 DH |
1000 | if (error < 0) |
1001 | goto error; | |
54af3bb5 TM |
1002 | if (server->nfs_client->rpc_ops->version == 3) { |
1003 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1004 | server->namelen = NFS3_MAXNAMLEN; | |
62a55d08 | 1005 | if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1006 | server->caps |= NFS_CAP_READDIRPLUS; |
1007 | } else { | |
1008 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1009 | server->namelen = NFS2_MAXNAMLEN; | |
1010 | } | |
1011 | ||
fbca779a | 1012 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
62a55d08 SM |
1013 | error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, |
1014 | fattr, NULL, NULL); | |
54ceac45 DH |
1015 | if (error < 0) { |
1016 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1017 | goto error; | |
1018 | } | |
1019 | } | |
fbca779a | 1020 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1021 | |
6daabf1b DH |
1022 | dprintk("Server FSID: %llx:%llx\n", |
1023 | (unsigned long long) server->fsid.major, | |
1024 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1025 | |
fca5238e | 1026 | nfs_server_insert_lists(server); |
54ceac45 | 1027 | server->mount_time = jiffies; |
fbca779a | 1028 | nfs_free_fattr(fattr); |
54ceac45 DH |
1029 | return server; |
1030 | ||
1031 | error: | |
fbca779a | 1032 | nfs_free_fattr(fattr); |
54ceac45 DH |
1033 | nfs_free_server(server); |
1034 | return ERR_PTR(error); | |
1035 | } | |
ddda8e0a | 1036 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1037 | |
54ceac45 DH |
1038 | /* |
1039 | * Clone an NFS2, NFS3 or NFS4 server record | |
1040 | */ | |
1041 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1042 | struct nfs_fh *fh, | |
7e6eb683 BS |
1043 | struct nfs_fattr *fattr, |
1044 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1045 | { |
1046 | struct nfs_server *server; | |
fbca779a | 1047 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1048 | int error; |
1049 | ||
54ceac45 DH |
1050 | server = nfs_alloc_server(); |
1051 | if (!server) | |
1052 | return ERR_PTR(-ENOMEM); | |
1053 | ||
1a58e8a0 TM |
1054 | server->cred = get_cred(source->cred); |
1055 | ||
fbca779a TM |
1056 | error = -ENOMEM; |
1057 | fattr_fsinfo = nfs_alloc_fattr(); | |
1058 | if (fattr_fsinfo == NULL) | |
1059 | goto out_free_server; | |
1060 | ||
54ceac45 DH |
1061 | /* Copy data from the source */ |
1062 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1063 | server->destroy = source->destroy; |
212bf41d | 1064 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1065 | nfs_server_copy_userdata(server, source); |
1066 | ||
1067 | server->fsid = fattr->fsid; | |
1068 | ||
33170233 TM |
1069 | error = nfs_init_server_rpcclient(server, |
1070 | source->client->cl_timeout, | |
7e6eb683 | 1071 | flavor); |
54ceac45 DH |
1072 | if (error < 0) |
1073 | goto out_free_server; | |
54ceac45 DH |
1074 | |
1075 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1076 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1077 | if (error < 0) |
1078 | goto out_free_server; | |
1079 | ||
54af3bb5 TM |
1080 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1081 | server->namelen = NFS4_MAXNAMLEN; | |
1082 | ||
54ceac45 DH |
1083 | error = nfs_start_lockd(server); |
1084 | if (error < 0) | |
1085 | goto out_free_server; | |
1086 | ||
fca5238e | 1087 | nfs_server_insert_lists(server); |
54ceac45 DH |
1088 | server->mount_time = jiffies; |
1089 | ||
fbca779a | 1090 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1091 | return server; |
1092 | ||
1093 | out_free_server: | |
fbca779a | 1094 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 | 1095 | nfs_free_server(server); |
54ceac45 DH |
1096 | return ERR_PTR(error); |
1097 | } | |
ddda8e0a | 1098 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1099 | |
6b13168b SK |
1100 | void nfs_clients_init(struct net *net) |
1101 | { | |
1102 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1103 | ||
1104 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1105 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1106 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1107 | idr_init(&nn->cb_ident_idr); |
1108 | #endif | |
4c03ae4a | 1109 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1110 | nn->boot_time = ktime_get_real(); |
bf11fbdb TM |
1111 | |
1112 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1113 | } |
1114 | ||
10b7a70c TM |
1115 | void nfs_clients_exit(struct net *net) |
1116 | { | |
1117 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1118 | ||
bf11fbdb | 1119 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1120 | nfs_cleanup_cb_ident_idr(net); |
1121 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1122 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1123 | } | |
1124 | ||
6aaca566 | 1125 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1126 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1127 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1128 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1129 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1130 | ||
88e9d34c | 1131 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1132 | .start = nfs_server_list_start, |
1133 | .next = nfs_server_list_next, | |
1134 | .stop = nfs_server_list_stop, | |
1135 | .show = nfs_server_list_show, | |
1136 | }; | |
1137 | ||
6aaca566 DH |
1138 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1139 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1140 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1141 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1142 | ||
88e9d34c | 1143 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1144 | .start = nfs_volume_list_start, |
1145 | .next = nfs_volume_list_next, | |
1146 | .stop = nfs_volume_list_stop, | |
1147 | .show = nfs_volume_list_show, | |
1148 | }; | |
1149 | ||
6aaca566 DH |
1150 | /* |
1151 | * set up the iterator to start reading from the server list and return the first item | |
1152 | */ | |
1153 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1154 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1155 | { |
65b38851 | 1156 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1157 | |
6aaca566 | 1158 | /* lock the list against modification */ |
dc030858 | 1159 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1160 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1161 | } |
1162 | ||
1163 | /* | |
1164 | * move to next server | |
1165 | */ | |
1166 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1167 | { | |
65b38851 | 1168 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1169 | |
1170 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1171 | } |
1172 | ||
1173 | /* | |
1174 | * clean up after reading from the transports list | |
1175 | */ | |
1176 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1177 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1178 | { |
65b38851 | 1179 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1180 | |
1181 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * display a header line followed by a load of call lines | |
1186 | */ | |
1187 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1188 | { | |
1189 | struct nfs_client *clp; | |
65b38851 | 1190 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1191 | |
1192 | /* display header on line 1 */ | |
6b13168b | 1193 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1194 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | /* display one transport per line on subsequent lines */ | |
1199 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1200 | ||
940aab49 MN |
1201 | /* Check if the client is initialized */ |
1202 | if (clp->cl_cons_state != NFS_CS_READY) | |
1203 | return 0; | |
1204 | ||
2446ab60 | 1205 | rcu_read_lock(); |
5d8515ca | 1206 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1207 | clp->rpc_ops->version, |
5d8515ca CL |
1208 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1209 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1210 | refcount_read(&clp->cl_count), |
6aaca566 | 1211 | clp->cl_hostname); |
2446ab60 | 1212 | rcu_read_unlock(); |
6aaca566 DH |
1213 | |
1214 | return 0; | |
1215 | } | |
1216 | ||
6aaca566 DH |
1217 | /* |
1218 | * set up the iterator to start reading from the volume list and return the first item | |
1219 | */ | |
1220 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1221 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1222 | { |
65b38851 | 1223 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1224 | |
6aaca566 | 1225 | /* lock the list against modification */ |
dc030858 | 1226 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1227 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1228 | } |
1229 | ||
1230 | /* | |
1231 | * move to next volume | |
1232 | */ | |
1233 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1234 | { | |
65b38851 | 1235 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1236 | |
1237 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1238 | } |
1239 | ||
1240 | /* | |
1241 | * clean up after reading from the transports list | |
1242 | */ | |
1243 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1244 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1245 | { |
65b38851 | 1246 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1247 | |
1248 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1249 | } |
1250 | ||
1251 | /* | |
1252 | * display a header line followed by a load of call lines | |
1253 | */ | |
1254 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1255 | { | |
1256 | struct nfs_server *server; | |
1257 | struct nfs_client *clp; | |
df05a49f KM |
1258 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1259 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1260 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1261 | |
1262 | /* display header on line 1 */ | |
c25d32b2 | 1263 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1264 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1265 | " FSC\n"); | |
6aaca566 DH |
1266 | return 0; |
1267 | } | |
1268 | /* display one transport per line on subsequent lines */ | |
1269 | server = list_entry(v, struct nfs_server, master_link); | |
1270 | clp = server->nfs_client; | |
1271 | ||
df05a49f | 1272 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1273 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1274 | ||
df05a49f | 1275 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1276 | (unsigned long long) server->fsid.major, |
1277 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1278 | |
2446ab60 | 1279 | rcu_read_lock(); |
df05a49f | 1280 | seq_printf(m, "v%u %s %s %-12s %-33s %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), | |
6aaca566 | 1284 | dev, |
5d1acff1 DH |
1285 | fsid, |
1286 | nfs_server_fscache_state(server)); | |
2446ab60 | 1287 | rcu_read_unlock(); |
6aaca566 DH |
1288 | |
1289 | return 0; | |
1290 | } | |
1291 | ||
65b38851 EB |
1292 | int nfs_fs_proc_net_init(struct net *net) |
1293 | { | |
1294 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1295 | struct proc_dir_entry *p; | |
1296 | ||
1297 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1298 | if (!nn->proc_nfsfs) | |
1299 | goto error_0; | |
1300 | ||
1301 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1302 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1303 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1304 | if (!p) |
1305 | goto error_1; | |
1306 | ||
1307 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1308 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1309 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1310 | if (!p) |
21e81002 | 1311 | goto error_1; |
65b38851 EB |
1312 | return 0; |
1313 | ||
65b38851 | 1314 | error_1: |
21e81002 | 1315 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1316 | error_0: |
1317 | return -ENOMEM; | |
1318 | } | |
1319 | ||
1320 | void nfs_fs_proc_net_exit(struct net *net) | |
1321 | { | |
21e81002 | 1322 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1323 | } |
1324 | ||
6aaca566 DH |
1325 | /* |
1326 | * initialise the /proc/fs/nfsfs/ directory | |
1327 | */ | |
1328 | int __init nfs_fs_proc_init(void) | |
1329 | { | |
6a062a36 | 1330 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1331 | goto error_0; |
1332 | ||
6aaca566 | 1333 | /* a file of servers with which we're dealing */ |
6a062a36 | 1334 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1335 | goto error_1; |
1336 | ||
6aaca566 | 1337 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1338 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1339 | goto error_1; | |
6aaca566 | 1340 | |
6a062a36 | 1341 | return 0; |
6aaca566 | 1342 | error_1: |
6a062a36 | 1343 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1344 | error_0: |
1345 | return -ENOMEM; | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * clean up the /proc/fs/nfsfs/ directory | |
1350 | */ | |
1351 | void nfs_fs_proc_exit(void) | |
1352 | { | |
6a062a36 | 1353 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1354 | } |
1355 | ||
1356 | #endif /* CONFIG_PROC_FS */ |