Commit | Line | Data |
---|---|---|
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; | |
d6870312 | 33 | idr_preload(GFP_KERNEL); |
ec409897 | 34 | spin_lock(&nn->nfs_client_lock); |
d6870312 TH |
35 | ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT); |
36 | if (ret >= 0) | |
37 | clp->cl_cb_ident = ret; | |
ec409897 | 38 | spin_unlock(&nn->nfs_client_lock); |
d6870312 TH |
39 | idr_preload_end(); |
40 | return ret < 0 ? ret : 0; | |
ec409897 BS |
41 | } |
42 | ||
43 | #ifdef CONFIG_NFS_V4_1 | |
44 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
45 | { | |
46 | if (nfs4_has_session(clp)) { | |
47 | nfs4_destroy_session(clp->cl_session); | |
48 | nfs4_destroy_clientid(clp); | |
49 | } | |
50 | ||
51 | } | |
52 | #else /* CONFIG_NFS_V4_1 */ | |
53 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
54 | { | |
55 | } | |
56 | #endif /* CONFIG_NFS_V4_1 */ | |
57 | ||
58 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
59 | { | |
60 | int err; | |
61 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
62 | if (IS_ERR(clp)) | |
63 | return clp; | |
64 | ||
65 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
66 | if (err) | |
67 | goto error; | |
68 | ||
42c2c424 SD |
69 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
70 | err = -EINVAL; | |
71 | goto error; | |
72 | } | |
73 | ||
ec409897 BS |
74 | spin_lock_init(&clp->cl_lock); |
75 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
76 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
77 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
78 | clp->cl_minorversion = cl_init->minorversion; | |
79 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
80 | return clp; | |
81 | ||
82 | error: | |
7653f6ff | 83 | nfs_free_client(clp); |
ec409897 BS |
84 | return ERR_PTR(err); |
85 | } | |
86 | ||
87 | /* | |
88 | * Destroy the NFS4 callback service | |
89 | */ | |
90 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
91 | { | |
92 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 93 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
94 | } |
95 | ||
96 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
97 | { | |
98 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
99 | nfs4_kill_renewd(clp); | |
100 | nfs4_shutdown_session(clp); | |
101 | nfs4_destroy_callback(clp); | |
102 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
103 | nfs_idmap_delete(clp); | |
104 | ||
105 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
106 | kfree(clp->cl_serverowner); | |
107 | kfree(clp->cl_serverscope); | |
108 | kfree(clp->cl_implid); | |
109 | } | |
110 | ||
111 | void nfs4_free_client(struct nfs_client *clp) | |
112 | { | |
113 | nfs4_shutdown_client(clp); | |
114 | nfs_free_client(clp); | |
115 | } | |
116 | ||
428360d7 BS |
117 | /* |
118 | * Initialize the NFS4 callback service | |
119 | */ | |
120 | static int nfs4_init_callback(struct nfs_client *clp) | |
121 | { | |
122 | int error; | |
123 | ||
124 | if (clp->rpc_ops->version == 4) { | |
125 | struct rpc_xprt *xprt; | |
126 | ||
127 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); | |
128 | ||
129 | if (nfs4_has_session(clp)) { | |
130 | error = xprt_setup_backchannel(xprt, | |
131 | NFS41_BC_MIN_CALLBACKS); | |
132 | if (error < 0) | |
133 | return error; | |
134 | } | |
135 | ||
136 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
137 | if (error < 0) { | |
138 | dprintk("%s: failed to start callback. Error = %d\n", | |
139 | __func__, error); | |
140 | return error; | |
141 | } | |
142 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
143 | } | |
144 | return 0; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Initialize the minor version specific parts of an NFS4 client record | |
149 | */ | |
150 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
151 | { | |
152 | #if defined(CONFIG_NFS_V4_1) | |
153 | if (clp->cl_mvops->minor_version) { | |
154 | struct nfs4_session *session = NULL; | |
155 | /* | |
156 | * Create the session and mark it expired. | |
157 | * When a SEQUENCE operation encounters the expired session | |
158 | * it will do session recovery to initialize it. | |
159 | */ | |
160 | session = nfs4_alloc_session(clp); | |
161 | if (!session) | |
162 | return -ENOMEM; | |
163 | ||
164 | clp->cl_session = session; | |
165 | /* | |
166 | * The create session reply races with the server back | |
167 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
168 | * so that the client back channel can find the | |
169 | * nfs_client struct | |
170 | */ | |
171 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
172 | } | |
173 | #endif /* CONFIG_NFS_V4_1 */ | |
174 | ||
175 | return nfs4_init_callback(clp); | |
176 | } | |
177 | ||
178 | /** | |
179 | * nfs4_init_client - Initialise an NFS4 client record | |
180 | * | |
181 | * @clp: nfs_client to initialise | |
182 | * @timeparms: timeout parameters for underlying RPC transport | |
183 | * @ip_addr: callback IP address in presentation format | |
184 | * @authflavor: authentication flavor for underlying RPC transport | |
185 | * | |
186 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
187 | */ | |
188 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
189 | const struct rpc_timeout *timeparms, | |
f8407299 | 190 | const char *ip_addr) |
428360d7 BS |
191 | { |
192 | char buf[INET6_ADDRSTRLEN + 1]; | |
05f4c350 | 193 | struct nfs_client *old; |
428360d7 BS |
194 | int error; |
195 | ||
196 | if (clp->cl_cons_state == NFS_CS_READY) { | |
197 | /* the client is initialised already */ | |
198 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
199 | return clp; | |
200 | } | |
201 | ||
202 | /* Check NFS protocol revision and initialize RPC op vector */ | |
203 | clp->rpc_ops = &nfs_v4_clientops; | |
204 | ||
98f98cf5 TM |
205 | if (clp->cl_minorversion != 0) |
206 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 207 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
4edaa308 | 208 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I); |
23631227 | 209 | if (error == -EINVAL) |
83c168bf | 210 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
428360d7 BS |
211 | if (error < 0) |
212 | goto error; | |
213 | ||
214 | /* If no clientaddr= option was specified, find a usable cb address */ | |
215 | if (ip_addr == NULL) { | |
216 | struct sockaddr_storage cb_addr; | |
217 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
218 | ||
219 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
220 | if (error < 0) | |
221 | goto error; | |
222 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
223 | if (error < 0) | |
224 | goto error; | |
225 | ip_addr = (const char *)buf; | |
226 | } | |
227 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
228 | ||
229 | error = nfs_idmap_new(clp); | |
230 | if (error < 0) { | |
231 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
232 | __func__, error); | |
233 | goto error; | |
234 | } | |
235 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
236 | ||
237 | error = nfs4_init_client_minor_version(clp); | |
238 | if (error < 0) | |
239 | goto error; | |
240 | ||
241 | if (!nfs4_has_session(clp)) | |
242 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
05f4c350 CL |
243 | |
244 | error = nfs4_discover_server_trunking(clp, &old); | |
245 | if (error < 0) | |
246 | goto error; | |
4ae19c2d | 247 | nfs_put_client(clp); |
05f4c350 CL |
248 | if (clp != old) { |
249 | clp->cl_preserve_clid = true; | |
05f4c350 | 250 | clp = old; |
05f4c350 CL |
251 | } |
252 | ||
428360d7 BS |
253 | return clp; |
254 | ||
255 | error: | |
256 | nfs_mark_client_ready(clp, error); | |
257 | nfs_put_client(clp); | |
258 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
259 | return ERR_PTR(error); | |
260 | } | |
fcf10398 | 261 | |
05f4c350 CL |
262 | /* |
263 | * SETCLIENTID just did a callback update with the callback ident in | |
264 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
265 | * actually the same server. Swap the callback IDs so that "keep" | |
266 | * will continue to use the callback ident the server now knows about, | |
267 | * and so that "keep"'s original callback ident is destroyed when | |
268 | * "drop" is freed. | |
269 | */ | |
270 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
271 | struct nfs_client *drop) | |
272 | { | |
273 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
274 | unsigned int save = keep->cl_cb_ident; | |
275 | ||
276 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
277 | return; | |
278 | ||
279 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
280 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
281 | ||
282 | spin_lock(&nn->nfs_client_lock); | |
283 | ||
284 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
285 | keep->cl_cb_ident = drop->cl_cb_ident; | |
286 | ||
287 | idr_replace(&nn->cb_ident_idr, drop, save); | |
288 | drop->cl_cb_ident = save; | |
289 | ||
290 | spin_unlock(&nn->nfs_client_lock); | |
291 | } | |
292 | ||
293 | /** | |
294 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
295 | * | |
296 | * @new: nfs_client with client ID to test | |
297 | * @result: OUT: found nfs_client, or new | |
298 | * @cred: credential to use for trunking test | |
299 | * | |
300 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
301 | * If zero is returned, an nfs_client pointer is planted in "result." | |
302 | * | |
303 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
304 | * the last nfs_client on the list. | |
305 | */ | |
306 | int nfs40_walk_client_list(struct nfs_client *new, | |
307 | struct nfs_client **result, | |
308 | struct rpc_cred *cred) | |
309 | { | |
310 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 311 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
312 | struct nfs4_setclientid_res clid = { |
313 | .clientid = new->cl_clientid, | |
314 | .confirm = new->cl_confirm, | |
315 | }; | |
4ae19c2d | 316 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
317 | |
318 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 319 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
05f4c350 CL |
320 | /* If "pos" isn't marked ready, we can't trust the |
321 | * remaining fields in "pos" */ | |
7b1f1fd1 TM |
322 | if (pos->cl_cons_state > NFS_CS_READY) { |
323 | atomic_inc(&pos->cl_count); | |
324 | spin_unlock(&nn->nfs_client_lock); | |
325 | ||
326 | if (prev) | |
327 | nfs_put_client(prev); | |
328 | prev = pos; | |
329 | ||
330 | status = nfs_wait_client_init_complete(pos); | |
331 | spin_lock(&nn->nfs_client_lock); | |
332 | if (status < 0) | |
333 | continue; | |
334 | } | |
335 | if (pos->cl_cons_state != NFS_CS_READY) | |
05f4c350 CL |
336 | continue; |
337 | ||
338 | if (pos->rpc_ops != new->rpc_ops) | |
339 | continue; | |
340 | ||
341 | if (pos->cl_proto != new->cl_proto) | |
342 | continue; | |
343 | ||
344 | if (pos->cl_minorversion != new->cl_minorversion) | |
345 | continue; | |
346 | ||
347 | if (pos->cl_clientid != new->cl_clientid) | |
348 | continue; | |
349 | ||
350 | atomic_inc(&pos->cl_count); | |
351 | spin_unlock(&nn->nfs_client_lock); | |
352 | ||
353 | if (prev) | |
354 | nfs_put_client(prev); | |
4ae19c2d | 355 | prev = pos; |
05f4c350 CL |
356 | |
357 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
358 | switch (status) { |
359 | case -NFS4ERR_STALE_CLIENTID: | |
360 | break; | |
361 | case 0: | |
05f4c350 CL |
362 | nfs4_swap_callback_idents(pos, new); |
363 | ||
4ae19c2d | 364 | prev = NULL; |
05f4c350 CL |
365 | *result = pos; |
366 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", | |
367 | __func__, pos, atomic_read(&pos->cl_count)); | |
4ae19c2d TM |
368 | default: |
369 | goto out; | |
05f4c350 CL |
370 | } |
371 | ||
372 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 373 | } |
4ae19c2d | 374 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 375 | |
202c312d | 376 | /* No match found. The server lost our clientid */ |
4ae19c2d | 377 | out: |
05f4c350 CL |
378 | if (prev) |
379 | nfs_put_client(prev); | |
4ae19c2d TM |
380 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
381 | return status; | |
05f4c350 CL |
382 | } |
383 | ||
384 | #ifdef CONFIG_NFS_V4_1 | |
f9d640f3 TM |
385 | /* |
386 | * Returns true if the client IDs match | |
387 | */ | |
388 | static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b) | |
389 | { | |
390 | if (a->cl_clientid != b->cl_clientid) { | |
391 | dprintk("NFS: --> %s client ID %llx does not match %llx\n", | |
392 | __func__, a->cl_clientid, b->cl_clientid); | |
393 | return false; | |
394 | } | |
395 | dprintk("NFS: --> %s client ID %llx matches %llx\n", | |
396 | __func__, a->cl_clientid, b->cl_clientid); | |
397 | return true; | |
398 | } | |
399 | ||
05f4c350 CL |
400 | /* |
401 | * Returns true if the server owners match | |
402 | */ | |
403 | static bool | |
404 | nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b) | |
405 | { | |
406 | struct nfs41_server_owner *o1 = a->cl_serverowner; | |
407 | struct nfs41_server_owner *o2 = b->cl_serverowner; | |
408 | ||
409 | if (o1->minor_id != o2->minor_id) { | |
410 | dprintk("NFS: --> %s server owner minor IDs do not match\n", | |
411 | __func__); | |
412 | return false; | |
413 | } | |
414 | ||
415 | if (o1->major_id_sz != o2->major_id_sz) | |
416 | goto out_major_mismatch; | |
417 | if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0) | |
418 | goto out_major_mismatch; | |
419 | ||
420 | dprintk("NFS: --> %s server owners match\n", __func__); | |
421 | return true; | |
422 | ||
423 | out_major_mismatch: | |
424 | dprintk("NFS: --> %s server owner major IDs do not match\n", | |
425 | __func__); | |
426 | return false; | |
427 | } | |
428 | ||
429 | /** | |
430 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
431 | * | |
432 | * @new: nfs_client with client ID to test | |
433 | * @result: OUT: found nfs_client, or new | |
434 | * @cred: credential to use for trunking test | |
435 | * | |
436 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
437 | * If zero is returned, an nfs_client pointer is planted in "result." | |
438 | * | |
439 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
440 | * the last nfs_client on the list. | |
441 | */ | |
442 | int nfs41_walk_client_list(struct nfs_client *new, | |
443 | struct nfs_client **result, | |
444 | struct rpc_cred *cred) | |
445 | { | |
446 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 447 | struct nfs_client *pos, *prev = NULL; |
202c312d | 448 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
449 | |
450 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 451 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
05f4c350 CL |
452 | /* If "pos" isn't marked ready, we can't trust the |
453 | * remaining fields in "pos", especially the client | |
454 | * ID and serverowner fields. Wait for CREATE_SESSION | |
455 | * to finish. */ | |
7b1f1fd1 | 456 | if (pos->cl_cons_state > NFS_CS_READY) { |
05f4c350 CL |
457 | atomic_inc(&pos->cl_count); |
458 | spin_unlock(&nn->nfs_client_lock); | |
459 | ||
460 | if (prev) | |
461 | nfs_put_client(prev); | |
462 | prev = pos; | |
463 | ||
202c312d | 464 | status = nfs_wait_client_init_complete(pos); |
7b1f1fd1 TM |
465 | if (status == 0) { |
466 | nfs4_schedule_lease_recovery(pos); | |
467 | status = nfs4_wait_clnt_recover(pos); | |
05f4c350 | 468 | } |
05f4c350 | 469 | spin_lock(&nn->nfs_client_lock); |
65436ec0 TM |
470 | if (status < 0) |
471 | continue; | |
05f4c350 | 472 | } |
7b1f1fd1 TM |
473 | if (pos->cl_cons_state != NFS_CS_READY) |
474 | continue; | |
05f4c350 CL |
475 | |
476 | if (pos->rpc_ops != new->rpc_ops) | |
477 | continue; | |
478 | ||
479 | if (pos->cl_proto != new->cl_proto) | |
480 | continue; | |
481 | ||
482 | if (pos->cl_minorversion != new->cl_minorversion) | |
483 | continue; | |
484 | ||
485 | if (!nfs4_match_clientids(pos, new)) | |
486 | continue; | |
487 | ||
488 | if (!nfs4_match_serverowners(pos, new)) | |
489 | continue; | |
490 | ||
4ae19c2d | 491 | atomic_inc(&pos->cl_count); |
7b1f1fd1 | 492 | *result = pos; |
eb04e0ac | 493 | status = 0; |
05f4c350 CL |
494 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", |
495 | __func__, pos, atomic_read(&pos->cl_count)); | |
7b1f1fd1 | 496 | break; |
05f4c350 CL |
497 | } |
498 | ||
202c312d | 499 | /* No matching nfs_client found. */ |
05f4c350 | 500 | spin_unlock(&nn->nfs_client_lock); |
202c312d | 501 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
7b1f1fd1 TM |
502 | if (prev) |
503 | nfs_put_client(prev); | |
202c312d | 504 | return status; |
05f4c350 CL |
505 | } |
506 | #endif /* CONFIG_NFS_V4_1 */ | |
507 | ||
fcf10398 BS |
508 | static void nfs4_destroy_server(struct nfs_server *server) |
509 | { | |
510 | nfs_server_return_all_delegations(server); | |
511 | unset_pnfs_layoutdriver(server); | |
512 | nfs4_purge_state_owners(server); | |
513 | } | |
514 | ||
515 | /* | |
516 | * NFSv4.0 callback thread helper | |
517 | * | |
518 | * Find a client by callback identifier | |
519 | */ | |
520 | struct nfs_client * | |
521 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
522 | { | |
523 | struct nfs_client *clp; | |
524 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
525 | ||
526 | spin_lock(&nn->nfs_client_lock); | |
527 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
528 | if (clp) | |
529 | atomic_inc(&clp->cl_count); | |
530 | spin_unlock(&nn->nfs_client_lock); | |
531 | return clp; | |
532 | } | |
533 | ||
534 | #if defined(CONFIG_NFS_V4_1) | |
535 | /* Common match routine for v4.0 and v4.1 callback services */ | |
536 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
537 | struct nfs_client *clp, u32 minorversion) | |
538 | { | |
539 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
540 | ||
541 | /* Don't match clients that failed to initialise */ | |
542 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
543 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
544 | return false; | |
545 | ||
546 | smp_rmb(); | |
547 | ||
548 | /* Match the version and minorversion */ | |
549 | if (clp->rpc_ops->version != 4 || | |
550 | clp->cl_minorversion != minorversion) | |
551 | return false; | |
552 | ||
553 | /* Match only the IP address, not the port number */ | |
554 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
555 | return false; | |
556 | ||
557 | return true; | |
558 | } | |
559 | ||
560 | /* | |
561 | * NFSv4.1 callback thread helper | |
562 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
563 | * minorversion, and sessionID | |
564 | * | |
565 | * Returns NULL if no such client | |
566 | */ | |
567 | struct nfs_client * | |
568 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 569 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
570 | { |
571 | struct nfs_client *clp; | |
572 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
573 | ||
574 | spin_lock(&nn->nfs_client_lock); | |
575 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
459de2ed | 576 | if (nfs4_cb_match_client(addr, clp, minorversion) == false) |
fcf10398 BS |
577 | continue; |
578 | ||
579 | if (!nfs4_has_session(clp)) | |
580 | continue; | |
581 | ||
582 | /* Match sessionid*/ | |
583 | if (memcmp(clp->cl_session->sess_id.data, | |
584 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
585 | continue; | |
586 | ||
587 | atomic_inc(&clp->cl_count); | |
588 | spin_unlock(&nn->nfs_client_lock); | |
589 | return clp; | |
590 | } | |
591 | spin_unlock(&nn->nfs_client_lock); | |
592 | return NULL; | |
593 | } | |
594 | ||
595 | #else /* CONFIG_NFS_V4_1 */ | |
596 | ||
597 | struct nfs_client * | |
598 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 599 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
600 | { |
601 | return NULL; | |
602 | } | |
603 | #endif /* CONFIG_NFS_V4_1 */ | |
604 | ||
605 | /* | |
606 | * Set up an NFS4 client | |
607 | */ | |
608 | static int nfs4_set_client(struct nfs_server *server, | |
609 | const char *hostname, | |
610 | const struct sockaddr *addr, | |
611 | const size_t addrlen, | |
612 | const char *ip_addr, | |
613 | rpc_authflavor_t authflavour, | |
614 | int proto, const struct rpc_timeout *timeparms, | |
615 | u32 minorversion, struct net *net) | |
616 | { | |
617 | struct nfs_client_initdata cl_init = { | |
618 | .hostname = hostname, | |
619 | .addr = addr, | |
620 | .addrlen = addrlen, | |
ab7017a3 | 621 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
622 | .proto = proto, |
623 | .minorversion = minorversion, | |
624 | .net = net, | |
625 | }; | |
626 | struct nfs_client *clp; | |
627 | int error; | |
628 | ||
629 | dprintk("--> nfs4_set_client()\n"); | |
630 | ||
631 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
632 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
633 | if (server->options & NFS_OPTION_MIGRATION) |
634 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
fcf10398 BS |
635 | |
636 | /* Allocate or find a client reference we can use */ | |
637 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour); | |
638 | if (IS_ERR(clp)) { | |
639 | error = PTR_ERR(clp); | |
640 | goto error; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Query for the lease time on clientid setup or renewal | |
645 | * | |
646 | * Note that this will be set on nfs_clients that were created | |
647 | * only for the DS role and did not set this bit, but now will | |
648 | * serve a dual role. | |
649 | */ | |
650 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
651 | ||
652 | server->nfs_client = clp; | |
653 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
654 | return 0; | |
655 | error: | |
656 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
657 | return error; | |
658 | } | |
659 | ||
660 | /* | |
661 | * Set up a pNFS Data Server client. | |
662 | * | |
663 | * Return any existing nfs_client that matches server address,port,version | |
664 | * and minorversion. | |
665 | * | |
666 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
667 | * low timeout interval so that if a connection is lost, we retry through | |
668 | * the MDS. | |
669 | */ | |
670 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
671 | const struct sockaddr *ds_addr, int ds_addrlen, | |
672 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) | |
673 | { | |
674 | struct nfs_client_initdata cl_init = { | |
675 | .addr = ds_addr, | |
676 | .addrlen = ds_addrlen, | |
ab7017a3 | 677 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
678 | .proto = ds_proto, |
679 | .minorversion = mds_clp->cl_minorversion, | |
680 | .net = mds_clp->cl_net, | |
681 | }; | |
682 | struct rpc_timeout ds_timeout; | |
683 | struct nfs_client *clp; | |
684 | ||
685 | /* | |
686 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
687 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
688 | * (section 13.1 RFC 5661). | |
689 | */ | |
690 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
691 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
692 | mds_clp->cl_rpcclient->cl_auth->au_flavor); | |
693 | ||
694 | dprintk("<-- %s %p\n", __func__, clp); | |
695 | return clp; | |
696 | } | |
697 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
698 | ||
699 | /* | |
700 | * Session has been established, and the client marked ready. | |
701 | * Set the mount rsize and wsize with negotiated fore channel | |
702 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
703 | */ | |
704 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
705 | { | |
706 | #ifdef CONFIG_NFS_V4_1 | |
707 | struct nfs4_session *sess; | |
708 | u32 server_resp_sz; | |
709 | u32 server_rqst_sz; | |
710 | ||
711 | if (!nfs4_has_session(server->nfs_client)) | |
712 | return; | |
713 | sess = server->nfs_client->cl_session; | |
714 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
715 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
716 | ||
717 | if (server->rsize > server_resp_sz) | |
718 | server->rsize = server_resp_sz; | |
719 | if (server->wsize > server_rqst_sz) | |
720 | server->wsize = server_rqst_sz; | |
721 | #endif /* CONFIG_NFS_V4_1 */ | |
722 | } | |
723 | ||
724 | static int nfs4_server_common_setup(struct nfs_server *server, | |
725 | struct nfs_fh *mntfh) | |
726 | { | |
727 | struct nfs_fattr *fattr; | |
728 | int error; | |
729 | ||
fcf10398 BS |
730 | /* data servers support only a subset of NFSv4.1 */ |
731 | if (is_ds_only_client(server->nfs_client)) | |
732 | return -EPROTONOSUPPORT; | |
733 | ||
734 | fattr = nfs_alloc_fattr(); | |
735 | if (fattr == NULL) | |
736 | return -ENOMEM; | |
737 | ||
738 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 739 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
740 | if (error < 0) |
741 | goto out; | |
742 | ||
39c6daae TM |
743 | /* Set the basic capabilities */ |
744 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
745 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
746 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
747 | /* | |
748 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
749 | * authentication. | |
750 | */ | |
751 | if (nfs4_disable_idmapping && | |
752 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
753 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
754 | ||
755 | ||
fcf10398 BS |
756 | /* Probe the root fh to retrieve its FSID and filehandle */ |
757 | error = nfs4_get_rootfh(server, mntfh); | |
758 | if (error < 0) | |
759 | goto out; | |
760 | ||
761 | dprintk("Server FSID: %llx:%llx\n", | |
762 | (unsigned long long) server->fsid.major, | |
763 | (unsigned long long) server->fsid.minor); | |
764 | dprintk("Mount FH: %d\n", mntfh->size); | |
765 | ||
766 | nfs4_session_set_rwsize(server); | |
767 | ||
768 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
769 | if (error < 0) | |
770 | goto out; | |
771 | ||
772 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
773 | server->namelen = NFS4_MAXNAMLEN; | |
774 | ||
775 | nfs_server_insert_lists(server); | |
776 | server->mount_time = jiffies; | |
777 | server->destroy = nfs4_destroy_server; | |
778 | out: | |
779 | nfs_free_fattr(fattr); | |
780 | return error; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Create a version 4 volume record | |
785 | */ | |
786 | static int nfs4_init_server(struct nfs_server *server, | |
787 | const struct nfs_parsed_mount_data *data) | |
788 | { | |
789 | struct rpc_timeout timeparms; | |
790 | int error; | |
791 | ||
792 | dprintk("--> nfs4_init_server()\n"); | |
793 | ||
794 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
795 | data->timeo, data->retrans); | |
796 | ||
797 | /* Initialise the client representation from the mount data */ | |
798 | server->flags = data->flags; | |
fcf10398 BS |
799 | server->options = data->options; |
800 | ||
801 | /* Get a client record */ | |
802 | error = nfs4_set_client(server, | |
803 | data->nfs_server.hostname, | |
804 | (const struct sockaddr *)&data->nfs_server.address, | |
805 | data->nfs_server.addrlen, | |
806 | data->client_address, | |
807 | data->auth_flavors[0], | |
808 | data->nfs_server.protocol, | |
809 | &timeparms, | |
810 | data->minorversion, | |
811 | data->net); | |
812 | if (error < 0) | |
813 | goto error; | |
814 | ||
fcf10398 BS |
815 | if (data->rsize) |
816 | server->rsize = nfs_block_size(data->rsize, NULL); | |
817 | if (data->wsize) | |
818 | server->wsize = nfs_block_size(data->wsize, NULL); | |
819 | ||
820 | server->acregmin = data->acregmin * HZ; | |
821 | server->acregmax = data->acregmax * HZ; | |
822 | server->acdirmin = data->acdirmin * HZ; | |
823 | server->acdirmax = data->acdirmax * HZ; | |
824 | ||
825 | server->port = data->nfs_server.port; | |
826 | ||
827 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); | |
828 | ||
829 | error: | |
830 | /* Done */ | |
831 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
832 | return error; | |
833 | } | |
834 | ||
835 | /* | |
836 | * Create a version 4 volume record | |
837 | * - keyed on server and FSID | |
838 | */ | |
1179acc6 BS |
839 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
840 | struct nfs_fh *mntfh)*/ | |
841 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
842 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
843 | { |
844 | struct nfs_server *server; | |
845 | int error; | |
846 | ||
847 | dprintk("--> nfs4_create_server()\n"); | |
848 | ||
849 | server = nfs_alloc_server(); | |
850 | if (!server) | |
851 | return ERR_PTR(-ENOMEM); | |
852 | ||
853 | /* set up the general RPC client */ | |
1179acc6 | 854 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
855 | if (error < 0) |
856 | goto error; | |
857 | ||
1179acc6 | 858 | error = nfs4_server_common_setup(server, mount_info->mntfh); |
fcf10398 BS |
859 | if (error < 0) |
860 | goto error; | |
861 | ||
862 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
863 | return server; | |
864 | ||
865 | error: | |
866 | nfs_free_server(server); | |
867 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
868 | return ERR_PTR(error); | |
869 | } | |
870 | ||
871 | /* | |
872 | * Create an NFS4 referral server record | |
873 | */ | |
874 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
875 | struct nfs_fh *mntfh) | |
876 | { | |
877 | struct nfs_client *parent_client; | |
878 | struct nfs_server *server, *parent_server; | |
879 | int error; | |
880 | ||
881 | dprintk("--> nfs4_create_referral_server()\n"); | |
882 | ||
883 | server = nfs_alloc_server(); | |
884 | if (!server) | |
885 | return ERR_PTR(-ENOMEM); | |
886 | ||
887 | parent_server = NFS_SB(data->sb); | |
888 | parent_client = parent_server->nfs_client; | |
889 | ||
890 | /* Initialise the client representation from the parent server */ | |
891 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 BS |
892 | |
893 | /* Get a client representation. | |
894 | * Note: NFSv4 always uses TCP, */ | |
895 | error = nfs4_set_client(server, data->hostname, | |
896 | data->addr, | |
897 | data->addrlen, | |
898 | parent_client->cl_ipaddr, | |
899 | data->authflavor, | |
900 | rpc_protocol(parent_server->client), | |
901 | parent_server->client->cl_timeout, | |
902 | parent_client->cl_mvops->minor_version, | |
903 | parent_client->cl_net); | |
904 | if (error < 0) | |
905 | goto error; | |
906 | ||
907 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
908 | if (error < 0) | |
909 | goto error; | |
910 | ||
911 | error = nfs4_server_common_setup(server, mntfh); | |
912 | if (error < 0) | |
913 | goto error; | |
914 | ||
915 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
916 | return server; | |
917 | ||
918 | error: | |
919 | nfs_free_server(server); | |
920 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
921 | return ERR_PTR(error); | |
922 | } |