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428360d7 BS |
1 | /* |
2 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
3 | * Written by David Howells (dhowells@redhat.com) | |
4 | */ | |
fcf10398 | 5 | #include <linux/module.h> |
428360d7 BS |
6 | #include <linux/nfs_fs.h> |
7 | #include <linux/nfs_idmap.h> | |
fcf10398 | 8 | #include <linux/nfs_mount.h> |
5976687a | 9 | #include <linux/sunrpc/addr.h> |
428360d7 BS |
10 | #include <linux/sunrpc/auth.h> |
11 | #include <linux/sunrpc/xprt.h> | |
12 | #include <linux/sunrpc/bc_xprt.h> | |
13 | #include "internal.h" | |
14 | #include "callback.h" | |
fcf10398 | 15 | #include "delegation.h" |
73e39aaa | 16 | #include "nfs4session.h" |
fcf10398 BS |
17 | #include "pnfs.h" |
18 | #include "netns.h" | |
428360d7 BS |
19 | |
20 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
21 | ||
ec409897 BS |
22 | /* |
23 | * Get a unique NFSv4.0 callback identifier which will be used | |
24 | * by the V4.0 callback service to lookup the nfs_client struct | |
25 | */ | |
26 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
27 | { | |
28 | int ret = 0; | |
29 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
30 | ||
31 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
32 | return ret; | |
33 | retry: | |
34 | if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL)) | |
35 | return -ENOMEM; | |
36 | spin_lock(&nn->nfs_client_lock); | |
37 | ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident); | |
38 | spin_unlock(&nn->nfs_client_lock); | |
39 | if (ret == -EAGAIN) | |
40 | goto retry; | |
41 | return ret; | |
42 | } | |
43 | ||
44 | #ifdef CONFIG_NFS_V4_1 | |
45 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
46 | { | |
47 | if (nfs4_has_session(clp)) { | |
48 | nfs4_destroy_session(clp->cl_session); | |
49 | nfs4_destroy_clientid(clp); | |
50 | } | |
51 | ||
52 | } | |
53 | #else /* CONFIG_NFS_V4_1 */ | |
54 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
55 | { | |
56 | } | |
57 | #endif /* CONFIG_NFS_V4_1 */ | |
58 | ||
59 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
60 | { | |
61 | int err; | |
62 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
63 | if (IS_ERR(clp)) | |
64 | return clp; | |
65 | ||
66 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
67 | if (err) | |
68 | goto error; | |
69 | ||
70 | spin_lock_init(&clp->cl_lock); | |
71 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
72 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
73 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
74 | clp->cl_minorversion = cl_init->minorversion; | |
75 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
76 | return clp; | |
77 | ||
78 | error: | |
7653f6ff | 79 | nfs_free_client(clp); |
ec409897 BS |
80 | return ERR_PTR(err); |
81 | } | |
82 | ||
83 | /* | |
84 | * Destroy the NFS4 callback service | |
85 | */ | |
86 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
87 | { | |
88 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 89 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
90 | } |
91 | ||
92 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
93 | { | |
94 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
95 | nfs4_kill_renewd(clp); | |
96 | nfs4_shutdown_session(clp); | |
97 | nfs4_destroy_callback(clp); | |
98 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
99 | nfs_idmap_delete(clp); | |
100 | ||
101 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
102 | kfree(clp->cl_serverowner); | |
103 | kfree(clp->cl_serverscope); | |
104 | kfree(clp->cl_implid); | |
105 | } | |
106 | ||
107 | void nfs4_free_client(struct nfs_client *clp) | |
108 | { | |
109 | nfs4_shutdown_client(clp); | |
110 | nfs_free_client(clp); | |
111 | } | |
112 | ||
428360d7 BS |
113 | /* |
114 | * Initialize the NFS4 callback service | |
115 | */ | |
116 | static int nfs4_init_callback(struct nfs_client *clp) | |
117 | { | |
118 | int error; | |
119 | ||
120 | if (clp->rpc_ops->version == 4) { | |
121 | struct rpc_xprt *xprt; | |
122 | ||
123 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); | |
124 | ||
125 | if (nfs4_has_session(clp)) { | |
126 | error = xprt_setup_backchannel(xprt, | |
127 | NFS41_BC_MIN_CALLBACKS); | |
128 | if (error < 0) | |
129 | return error; | |
130 | } | |
131 | ||
132 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
133 | if (error < 0) { | |
134 | dprintk("%s: failed to start callback. Error = %d\n", | |
135 | __func__, error); | |
136 | return error; | |
137 | } | |
138 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* | |
144 | * Initialize the minor version specific parts of an NFS4 client record | |
145 | */ | |
146 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
147 | { | |
148 | #if defined(CONFIG_NFS_V4_1) | |
149 | if (clp->cl_mvops->minor_version) { | |
150 | struct nfs4_session *session = NULL; | |
151 | /* | |
152 | * Create the session and mark it expired. | |
153 | * When a SEQUENCE operation encounters the expired session | |
154 | * it will do session recovery to initialize it. | |
155 | */ | |
156 | session = nfs4_alloc_session(clp); | |
157 | if (!session) | |
158 | return -ENOMEM; | |
159 | ||
160 | clp->cl_session = session; | |
161 | /* | |
162 | * The create session reply races with the server back | |
163 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
164 | * so that the client back channel can find the | |
165 | * nfs_client struct | |
166 | */ | |
167 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
168 | } | |
169 | #endif /* CONFIG_NFS_V4_1 */ | |
170 | ||
171 | return nfs4_init_callback(clp); | |
172 | } | |
173 | ||
174 | /** | |
175 | * nfs4_init_client - Initialise an NFS4 client record | |
176 | * | |
177 | * @clp: nfs_client to initialise | |
178 | * @timeparms: timeout parameters for underlying RPC transport | |
179 | * @ip_addr: callback IP address in presentation format | |
180 | * @authflavor: authentication flavor for underlying RPC transport | |
181 | * | |
182 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
183 | */ | |
184 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
185 | const struct rpc_timeout *timeparms, | |
186 | const char *ip_addr, | |
187 | rpc_authflavor_t authflavour) | |
188 | { | |
189 | char buf[INET6_ADDRSTRLEN + 1]; | |
05f4c350 | 190 | struct nfs_client *old; |
428360d7 BS |
191 | int error; |
192 | ||
193 | if (clp->cl_cons_state == NFS_CS_READY) { | |
194 | /* the client is initialised already */ | |
195 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
196 | return clp; | |
197 | } | |
198 | ||
199 | /* Check NFS protocol revision and initialize RPC op vector */ | |
200 | clp->rpc_ops = &nfs_v4_clientops; | |
201 | ||
202 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); | |
203 | error = nfs_create_rpc_client(clp, timeparms, authflavour); | |
204 | if (error < 0) | |
205 | goto error; | |
206 | ||
207 | /* If no clientaddr= option was specified, find a usable cb address */ | |
208 | if (ip_addr == NULL) { | |
209 | struct sockaddr_storage cb_addr; | |
210 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
211 | ||
212 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
213 | if (error < 0) | |
214 | goto error; | |
215 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
216 | if (error < 0) | |
217 | goto error; | |
218 | ip_addr = (const char *)buf; | |
219 | } | |
220 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
221 | ||
222 | error = nfs_idmap_new(clp); | |
223 | if (error < 0) { | |
224 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
225 | __func__, error); | |
226 | goto error; | |
227 | } | |
228 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
229 | ||
230 | error = nfs4_init_client_minor_version(clp); | |
231 | if (error < 0) | |
232 | goto error; | |
233 | ||
234 | if (!nfs4_has_session(clp)) | |
235 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
05f4c350 CL |
236 | |
237 | error = nfs4_discover_server_trunking(clp, &old); | |
238 | if (error < 0) | |
239 | goto error; | |
240 | if (clp != old) { | |
241 | clp->cl_preserve_clid = true; | |
242 | nfs_put_client(clp); | |
243 | clp = old; | |
244 | atomic_inc(&clp->cl_count); | |
245 | } | |
246 | ||
428360d7 BS |
247 | return clp; |
248 | ||
249 | error: | |
250 | nfs_mark_client_ready(clp, error); | |
251 | nfs_put_client(clp); | |
252 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
253 | return ERR_PTR(error); | |
254 | } | |
fcf10398 | 255 | |
05f4c350 CL |
256 | /* |
257 | * SETCLIENTID just did a callback update with the callback ident in | |
258 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
259 | * actually the same server. Swap the callback IDs so that "keep" | |
260 | * will continue to use the callback ident the server now knows about, | |
261 | * and so that "keep"'s original callback ident is destroyed when | |
262 | * "drop" is freed. | |
263 | */ | |
264 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
265 | struct nfs_client *drop) | |
266 | { | |
267 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
268 | unsigned int save = keep->cl_cb_ident; | |
269 | ||
270 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
271 | return; | |
272 | ||
273 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
274 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
275 | ||
276 | spin_lock(&nn->nfs_client_lock); | |
277 | ||
278 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
279 | keep->cl_cb_ident = drop->cl_cb_ident; | |
280 | ||
281 | idr_replace(&nn->cb_ident_idr, drop, save); | |
282 | drop->cl_cb_ident = save; | |
283 | ||
284 | spin_unlock(&nn->nfs_client_lock); | |
285 | } | |
286 | ||
287 | /** | |
288 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
289 | * | |
290 | * @new: nfs_client with client ID to test | |
291 | * @result: OUT: found nfs_client, or new | |
292 | * @cred: credential to use for trunking test | |
293 | * | |
294 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
295 | * If zero is returned, an nfs_client pointer is planted in "result." | |
296 | * | |
297 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
298 | * the last nfs_client on the list. | |
299 | */ | |
300 | int nfs40_walk_client_list(struct nfs_client *new, | |
301 | struct nfs_client **result, | |
302 | struct rpc_cred *cred) | |
303 | { | |
304 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
305 | struct nfs_client *pos, *n, *prev = NULL; | |
306 | struct nfs4_setclientid_res clid = { | |
307 | .clientid = new->cl_clientid, | |
308 | .confirm = new->cl_confirm, | |
309 | }; | |
310 | int status; | |
311 | ||
312 | spin_lock(&nn->nfs_client_lock); | |
313 | list_for_each_entry_safe(pos, n, &nn->nfs_client_list, cl_share_link) { | |
314 | /* If "pos" isn't marked ready, we can't trust the | |
315 | * remaining fields in "pos" */ | |
316 | if (pos->cl_cons_state < NFS_CS_READY) | |
317 | continue; | |
318 | ||
319 | if (pos->rpc_ops != new->rpc_ops) | |
320 | continue; | |
321 | ||
322 | if (pos->cl_proto != new->cl_proto) | |
323 | continue; | |
324 | ||
325 | if (pos->cl_minorversion != new->cl_minorversion) | |
326 | continue; | |
327 | ||
328 | if (pos->cl_clientid != new->cl_clientid) | |
329 | continue; | |
330 | ||
331 | atomic_inc(&pos->cl_count); | |
332 | spin_unlock(&nn->nfs_client_lock); | |
333 | ||
334 | if (prev) | |
335 | nfs_put_client(prev); | |
336 | ||
337 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
338 | if (status == 0) { | |
339 | nfs4_swap_callback_idents(pos, new); | |
340 | ||
341 | nfs_put_client(pos); | |
342 | *result = pos; | |
343 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", | |
344 | __func__, pos, atomic_read(&pos->cl_count)); | |
345 | return 0; | |
346 | } | |
347 | if (status != -NFS4ERR_STALE_CLIENTID) { | |
348 | nfs_put_client(pos); | |
349 | dprintk("NFS: <-- %s status = %d, no result\n", | |
350 | __func__, status); | |
351 | return status; | |
352 | } | |
353 | ||
354 | spin_lock(&nn->nfs_client_lock); | |
355 | prev = pos; | |
356 | } | |
357 | ||
358 | /* | |
359 | * No matching nfs_client found. This should be impossible, | |
360 | * because the new nfs_client has already been added to | |
361 | * nfs_client_list by nfs_get_client(). | |
362 | * | |
363 | * Don't BUG(), since the caller is holding a mutex. | |
364 | */ | |
365 | if (prev) | |
366 | nfs_put_client(prev); | |
367 | spin_unlock(&nn->nfs_client_lock); | |
368 | pr_err("NFS: %s Error: no matching nfs_client found\n", __func__); | |
369 | return -NFS4ERR_STALE_CLIENTID; | |
370 | } | |
371 | ||
372 | #ifdef CONFIG_NFS_V4_1 | |
f9d640f3 TM |
373 | /* |
374 | * Returns true if the client IDs match | |
375 | */ | |
376 | static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b) | |
377 | { | |
378 | if (a->cl_clientid != b->cl_clientid) { | |
379 | dprintk("NFS: --> %s client ID %llx does not match %llx\n", | |
380 | __func__, a->cl_clientid, b->cl_clientid); | |
381 | return false; | |
382 | } | |
383 | dprintk("NFS: --> %s client ID %llx matches %llx\n", | |
384 | __func__, a->cl_clientid, b->cl_clientid); | |
385 | return true; | |
386 | } | |
387 | ||
05f4c350 CL |
388 | /* |
389 | * Returns true if the server owners match | |
390 | */ | |
391 | static bool | |
392 | nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b) | |
393 | { | |
394 | struct nfs41_server_owner *o1 = a->cl_serverowner; | |
395 | struct nfs41_server_owner *o2 = b->cl_serverowner; | |
396 | ||
397 | if (o1->minor_id != o2->minor_id) { | |
398 | dprintk("NFS: --> %s server owner minor IDs do not match\n", | |
399 | __func__); | |
400 | return false; | |
401 | } | |
402 | ||
403 | if (o1->major_id_sz != o2->major_id_sz) | |
404 | goto out_major_mismatch; | |
405 | if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0) | |
406 | goto out_major_mismatch; | |
407 | ||
408 | dprintk("NFS: --> %s server owners match\n", __func__); | |
409 | return true; | |
410 | ||
411 | out_major_mismatch: | |
412 | dprintk("NFS: --> %s server owner major IDs do not match\n", | |
413 | __func__); | |
414 | return false; | |
415 | } | |
416 | ||
417 | /** | |
418 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
419 | * | |
420 | * @new: nfs_client with client ID to test | |
421 | * @result: OUT: found nfs_client, or new | |
422 | * @cred: credential to use for trunking test | |
423 | * | |
424 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
425 | * If zero is returned, an nfs_client pointer is planted in "result." | |
426 | * | |
427 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
428 | * the last nfs_client on the list. | |
429 | */ | |
430 | int nfs41_walk_client_list(struct nfs_client *new, | |
431 | struct nfs_client **result, | |
432 | struct rpc_cred *cred) | |
433 | { | |
434 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
435 | struct nfs_client *pos, *n, *prev = NULL; | |
436 | int error; | |
437 | ||
438 | spin_lock(&nn->nfs_client_lock); | |
439 | list_for_each_entry_safe(pos, n, &nn->nfs_client_list, cl_share_link) { | |
440 | /* If "pos" isn't marked ready, we can't trust the | |
441 | * remaining fields in "pos", especially the client | |
442 | * ID and serverowner fields. Wait for CREATE_SESSION | |
443 | * to finish. */ | |
444 | if (pos->cl_cons_state < NFS_CS_READY) { | |
445 | atomic_inc(&pos->cl_count); | |
446 | spin_unlock(&nn->nfs_client_lock); | |
447 | ||
448 | if (prev) | |
449 | nfs_put_client(prev); | |
450 | prev = pos; | |
451 | ||
452 | error = nfs_wait_client_init_complete(pos); | |
453 | if (error < 0) { | |
454 | nfs_put_client(pos); | |
c2ccc084 | 455 | spin_lock(&nn->nfs_client_lock); |
05f4c350 CL |
456 | continue; |
457 | } | |
458 | ||
459 | spin_lock(&nn->nfs_client_lock); | |
460 | } | |
461 | ||
462 | if (pos->rpc_ops != new->rpc_ops) | |
463 | continue; | |
464 | ||
465 | if (pos->cl_proto != new->cl_proto) | |
466 | continue; | |
467 | ||
468 | if (pos->cl_minorversion != new->cl_minorversion) | |
469 | continue; | |
470 | ||
471 | if (!nfs4_match_clientids(pos, new)) | |
472 | continue; | |
473 | ||
474 | if (!nfs4_match_serverowners(pos, new)) | |
475 | continue; | |
476 | ||
477 | spin_unlock(&nn->nfs_client_lock); | |
478 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", | |
479 | __func__, pos, atomic_read(&pos->cl_count)); | |
480 | ||
481 | *result = pos; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* | |
486 | * No matching nfs_client found. This should be impossible, | |
487 | * because the new nfs_client has already been added to | |
488 | * nfs_client_list by nfs_get_client(). | |
489 | * | |
490 | * Don't BUG(), since the caller is holding a mutex. | |
491 | */ | |
492 | spin_unlock(&nn->nfs_client_lock); | |
493 | pr_err("NFS: %s Error: no matching nfs_client found\n", __func__); | |
494 | return -NFS4ERR_STALE_CLIENTID; | |
495 | } | |
496 | #endif /* CONFIG_NFS_V4_1 */ | |
497 | ||
fcf10398 BS |
498 | static void nfs4_destroy_server(struct nfs_server *server) |
499 | { | |
500 | nfs_server_return_all_delegations(server); | |
501 | unset_pnfs_layoutdriver(server); | |
502 | nfs4_purge_state_owners(server); | |
503 | } | |
504 | ||
505 | /* | |
506 | * NFSv4.0 callback thread helper | |
507 | * | |
508 | * Find a client by callback identifier | |
509 | */ | |
510 | struct nfs_client * | |
511 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
512 | { | |
513 | struct nfs_client *clp; | |
514 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
515 | ||
516 | spin_lock(&nn->nfs_client_lock); | |
517 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
518 | if (clp) | |
519 | atomic_inc(&clp->cl_count); | |
520 | spin_unlock(&nn->nfs_client_lock); | |
521 | return clp; | |
522 | } | |
523 | ||
524 | #if defined(CONFIG_NFS_V4_1) | |
525 | /* Common match routine for v4.0 and v4.1 callback services */ | |
526 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
527 | struct nfs_client *clp, u32 minorversion) | |
528 | { | |
529 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
530 | ||
531 | /* Don't match clients that failed to initialise */ | |
532 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
533 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
534 | return false; | |
535 | ||
536 | smp_rmb(); | |
537 | ||
538 | /* Match the version and minorversion */ | |
539 | if (clp->rpc_ops->version != 4 || | |
540 | clp->cl_minorversion != minorversion) | |
541 | return false; | |
542 | ||
543 | /* Match only the IP address, not the port number */ | |
544 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
545 | return false; | |
546 | ||
547 | return true; | |
548 | } | |
549 | ||
550 | /* | |
551 | * NFSv4.1 callback thread helper | |
552 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
553 | * minorversion, and sessionID | |
554 | * | |
555 | * Returns NULL if no such client | |
556 | */ | |
557 | struct nfs_client * | |
558 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
559 | struct nfs4_sessionid *sid) | |
560 | { | |
561 | struct nfs_client *clp; | |
562 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
563 | ||
564 | spin_lock(&nn->nfs_client_lock); | |
565 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
566 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
567 | continue; | |
568 | ||
569 | if (!nfs4_has_session(clp)) | |
570 | continue; | |
571 | ||
572 | /* Match sessionid*/ | |
573 | if (memcmp(clp->cl_session->sess_id.data, | |
574 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
575 | continue; | |
576 | ||
577 | atomic_inc(&clp->cl_count); | |
578 | spin_unlock(&nn->nfs_client_lock); | |
579 | return clp; | |
580 | } | |
581 | spin_unlock(&nn->nfs_client_lock); | |
582 | return NULL; | |
583 | } | |
584 | ||
585 | #else /* CONFIG_NFS_V4_1 */ | |
586 | ||
587 | struct nfs_client * | |
588 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
589 | struct nfs4_sessionid *sid) | |
590 | { | |
591 | return NULL; | |
592 | } | |
593 | #endif /* CONFIG_NFS_V4_1 */ | |
594 | ||
595 | /* | |
596 | * Set up an NFS4 client | |
597 | */ | |
598 | static int nfs4_set_client(struct nfs_server *server, | |
599 | const char *hostname, | |
600 | const struct sockaddr *addr, | |
601 | const size_t addrlen, | |
602 | const char *ip_addr, | |
603 | rpc_authflavor_t authflavour, | |
604 | int proto, const struct rpc_timeout *timeparms, | |
605 | u32 minorversion, struct net *net) | |
606 | { | |
607 | struct nfs_client_initdata cl_init = { | |
608 | .hostname = hostname, | |
609 | .addr = addr, | |
610 | .addrlen = addrlen, | |
ab7017a3 | 611 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
612 | .proto = proto, |
613 | .minorversion = minorversion, | |
614 | .net = net, | |
615 | }; | |
616 | struct nfs_client *clp; | |
617 | int error; | |
618 | ||
619 | dprintk("--> nfs4_set_client()\n"); | |
620 | ||
621 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
622 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
623 | ||
624 | /* Allocate or find a client reference we can use */ | |
625 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour); | |
626 | if (IS_ERR(clp)) { | |
627 | error = PTR_ERR(clp); | |
628 | goto error; | |
629 | } | |
630 | ||
631 | /* | |
632 | * Query for the lease time on clientid setup or renewal | |
633 | * | |
634 | * Note that this will be set on nfs_clients that were created | |
635 | * only for the DS role and did not set this bit, but now will | |
636 | * serve a dual role. | |
637 | */ | |
638 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
639 | ||
640 | server->nfs_client = clp; | |
641 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
642 | return 0; | |
643 | error: | |
644 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
645 | return error; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Set up a pNFS Data Server client. | |
650 | * | |
651 | * Return any existing nfs_client that matches server address,port,version | |
652 | * and minorversion. | |
653 | * | |
654 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
655 | * low timeout interval so that if a connection is lost, we retry through | |
656 | * the MDS. | |
657 | */ | |
658 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
659 | const struct sockaddr *ds_addr, int ds_addrlen, | |
660 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) | |
661 | { | |
662 | struct nfs_client_initdata cl_init = { | |
663 | .addr = ds_addr, | |
664 | .addrlen = ds_addrlen, | |
ab7017a3 | 665 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
666 | .proto = ds_proto, |
667 | .minorversion = mds_clp->cl_minorversion, | |
668 | .net = mds_clp->cl_net, | |
669 | }; | |
670 | struct rpc_timeout ds_timeout; | |
671 | struct nfs_client *clp; | |
672 | ||
673 | /* | |
674 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
675 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
676 | * (section 13.1 RFC 5661). | |
677 | */ | |
678 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
679 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
680 | mds_clp->cl_rpcclient->cl_auth->au_flavor); | |
681 | ||
682 | dprintk("<-- %s %p\n", __func__, clp); | |
683 | return clp; | |
684 | } | |
685 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
686 | ||
687 | /* | |
688 | * Session has been established, and the client marked ready. | |
689 | * Set the mount rsize and wsize with negotiated fore channel | |
690 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
691 | */ | |
692 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
693 | { | |
694 | #ifdef CONFIG_NFS_V4_1 | |
695 | struct nfs4_session *sess; | |
696 | u32 server_resp_sz; | |
697 | u32 server_rqst_sz; | |
698 | ||
699 | if (!nfs4_has_session(server->nfs_client)) | |
700 | return; | |
701 | sess = server->nfs_client->cl_session; | |
702 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
703 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
704 | ||
705 | if (server->rsize > server_resp_sz) | |
706 | server->rsize = server_resp_sz; | |
707 | if (server->wsize > server_rqst_sz) | |
708 | server->wsize = server_rqst_sz; | |
709 | #endif /* CONFIG_NFS_V4_1 */ | |
710 | } | |
711 | ||
712 | static int nfs4_server_common_setup(struct nfs_server *server, | |
713 | struct nfs_fh *mntfh) | |
714 | { | |
715 | struct nfs_fattr *fattr; | |
716 | int error; | |
717 | ||
fcf10398 BS |
718 | /* data servers support only a subset of NFSv4.1 */ |
719 | if (is_ds_only_client(server->nfs_client)) | |
720 | return -EPROTONOSUPPORT; | |
721 | ||
722 | fattr = nfs_alloc_fattr(); | |
723 | if (fattr == NULL) | |
724 | return -ENOMEM; | |
725 | ||
726 | /* We must ensure the session is initialised first */ | |
727 | error = nfs4_init_session(server); | |
728 | if (error < 0) | |
729 | goto out; | |
730 | ||
731 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
732 | error = nfs4_get_rootfh(server, mntfh); | |
733 | if (error < 0) | |
734 | goto out; | |
735 | ||
736 | dprintk("Server FSID: %llx:%llx\n", | |
737 | (unsigned long long) server->fsid.major, | |
738 | (unsigned long long) server->fsid.minor); | |
739 | dprintk("Mount FH: %d\n", mntfh->size); | |
740 | ||
741 | nfs4_session_set_rwsize(server); | |
742 | ||
743 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
744 | if (error < 0) | |
745 | goto out; | |
746 | ||
747 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
748 | server->namelen = NFS4_MAXNAMLEN; | |
749 | ||
750 | nfs_server_insert_lists(server); | |
751 | server->mount_time = jiffies; | |
752 | server->destroy = nfs4_destroy_server; | |
753 | out: | |
754 | nfs_free_fattr(fattr); | |
755 | return error; | |
756 | } | |
757 | ||
758 | /* | |
759 | * Create a version 4 volume record | |
760 | */ | |
761 | static int nfs4_init_server(struct nfs_server *server, | |
762 | const struct nfs_parsed_mount_data *data) | |
763 | { | |
764 | struct rpc_timeout timeparms; | |
765 | int error; | |
766 | ||
767 | dprintk("--> nfs4_init_server()\n"); | |
768 | ||
769 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
770 | data->timeo, data->retrans); | |
771 | ||
772 | /* Initialise the client representation from the mount data */ | |
773 | server->flags = data->flags; | |
774 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; | |
775 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
776 | server->caps |= NFS_CAP_READDIRPLUS; | |
777 | server->options = data->options; | |
778 | ||
779 | /* Get a client record */ | |
780 | error = nfs4_set_client(server, | |
781 | data->nfs_server.hostname, | |
782 | (const struct sockaddr *)&data->nfs_server.address, | |
783 | data->nfs_server.addrlen, | |
784 | data->client_address, | |
785 | data->auth_flavors[0], | |
786 | data->nfs_server.protocol, | |
787 | &timeparms, | |
788 | data->minorversion, | |
789 | data->net); | |
790 | if (error < 0) | |
791 | goto error; | |
792 | ||
793 | /* | |
794 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
795 | * authentication. | |
796 | */ | |
797 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
798 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
799 | ||
800 | if (data->rsize) | |
801 | server->rsize = nfs_block_size(data->rsize, NULL); | |
802 | if (data->wsize) | |
803 | server->wsize = nfs_block_size(data->wsize, NULL); | |
804 | ||
805 | server->acregmin = data->acregmin * HZ; | |
806 | server->acregmax = data->acregmax * HZ; | |
807 | server->acdirmin = data->acdirmin * HZ; | |
808 | server->acdirmax = data->acdirmax * HZ; | |
809 | ||
810 | server->port = data->nfs_server.port; | |
811 | ||
812 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); | |
813 | ||
814 | error: | |
815 | /* Done */ | |
816 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
817 | return error; | |
818 | } | |
819 | ||
820 | /* | |
821 | * Create a version 4 volume record | |
822 | * - keyed on server and FSID | |
823 | */ | |
1179acc6 BS |
824 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
825 | struct nfs_fh *mntfh)*/ | |
826 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
827 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
828 | { |
829 | struct nfs_server *server; | |
830 | int error; | |
831 | ||
832 | dprintk("--> nfs4_create_server()\n"); | |
833 | ||
834 | server = nfs_alloc_server(); | |
835 | if (!server) | |
836 | return ERR_PTR(-ENOMEM); | |
837 | ||
838 | /* set up the general RPC client */ | |
1179acc6 | 839 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
840 | if (error < 0) |
841 | goto error; | |
842 | ||
1179acc6 | 843 | error = nfs4_server_common_setup(server, mount_info->mntfh); |
fcf10398 BS |
844 | if (error < 0) |
845 | goto error; | |
846 | ||
847 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
848 | return server; | |
849 | ||
850 | error: | |
851 | nfs_free_server(server); | |
852 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
853 | return ERR_PTR(error); | |
854 | } | |
855 | ||
856 | /* | |
857 | * Create an NFS4 referral server record | |
858 | */ | |
859 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
860 | struct nfs_fh *mntfh) | |
861 | { | |
862 | struct nfs_client *parent_client; | |
863 | struct nfs_server *server, *parent_server; | |
864 | int error; | |
865 | ||
866 | dprintk("--> nfs4_create_referral_server()\n"); | |
867 | ||
868 | server = nfs_alloc_server(); | |
869 | if (!server) | |
870 | return ERR_PTR(-ENOMEM); | |
871 | ||
872 | parent_server = NFS_SB(data->sb); | |
873 | parent_client = parent_server->nfs_client; | |
874 | ||
875 | /* Initialise the client representation from the parent server */ | |
876 | nfs_server_copy_userdata(server, parent_server); | |
877 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; | |
878 | ||
879 | /* Get a client representation. | |
880 | * Note: NFSv4 always uses TCP, */ | |
881 | error = nfs4_set_client(server, data->hostname, | |
882 | data->addr, | |
883 | data->addrlen, | |
884 | parent_client->cl_ipaddr, | |
885 | data->authflavor, | |
886 | rpc_protocol(parent_server->client), | |
887 | parent_server->client->cl_timeout, | |
888 | parent_client->cl_mvops->minor_version, | |
889 | parent_client->cl_net); | |
890 | if (error < 0) | |
891 | goto error; | |
892 | ||
893 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
894 | if (error < 0) | |
895 | goto error; | |
896 | ||
897 | error = nfs4_server_common_setup(server, mntfh); | |
898 | if (error < 0) | |
899 | goto error; | |
900 | ||
901 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
902 | return server; | |
903 | ||
904 | error: | |
905 | nfs_free_server(server); | |
906 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
907 | return ERR_PTR(error); | |
908 | } |