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 | |
0e20162e AA |
44 | /** |
45 | * Per auth flavor data server rpc clients | |
46 | */ | |
47 | struct nfs4_ds_server { | |
48 | struct list_head list; /* ds_clp->cl_ds_clients */ | |
49 | struct rpc_clnt *rpc_clnt; | |
50 | }; | |
51 | ||
52 | /** | |
53 | * Common lookup case for DS I/O | |
54 | */ | |
55 | static struct nfs4_ds_server * | |
56 | nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
57 | { | |
58 | struct nfs4_ds_server *dss; | |
59 | ||
60 | rcu_read_lock(); | |
61 | list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { | |
62 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
63 | continue; | |
64 | goto out; | |
65 | } | |
66 | dss = NULL; | |
67 | out: | |
68 | rcu_read_unlock(); | |
69 | return dss; | |
70 | } | |
71 | ||
72 | static struct nfs4_ds_server * | |
73 | nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, | |
74 | struct nfs4_ds_server *new) | |
75 | { | |
76 | struct nfs4_ds_server *dss; | |
77 | ||
78 | spin_lock(&ds_clp->cl_lock); | |
79 | list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { | |
80 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
81 | continue; | |
82 | goto out; | |
83 | } | |
84 | if (new) | |
85 | list_add_rcu(&new->list, &ds_clp->cl_ds_clients); | |
86 | dss = new; | |
87 | out: | |
88 | spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ | |
89 | return dss; | |
90 | } | |
91 | ||
92 | static struct nfs4_ds_server * | |
93 | nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
94 | { | |
95 | struct nfs4_ds_server *dss; | |
96 | ||
97 | dss = kmalloc(sizeof(*dss), GFP_NOFS); | |
98 | if (dss == NULL) | |
99 | return ERR_PTR(-ENOMEM); | |
100 | ||
101 | dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); | |
102 | if (IS_ERR(dss->rpc_clnt)) { | |
103 | int err = PTR_ERR(dss->rpc_clnt); | |
104 | kfree (dss); | |
105 | return ERR_PTR(err); | |
106 | } | |
107 | INIT_LIST_HEAD(&dss->list); | |
108 | ||
109 | return dss; | |
110 | } | |
111 | ||
112 | static void | |
113 | nfs4_free_ds_server(struct nfs4_ds_server *dss) | |
114 | { | |
115 | rpc_release_client(dss->rpc_clnt); | |
116 | kfree(dss); | |
117 | } | |
118 | ||
119 | /** | |
120 | * Find or create a DS rpc client with th MDS server rpc client auth flavor | |
121 | * in the nfs_client cl_ds_clients list. | |
122 | */ | |
123 | struct rpc_clnt * | |
124 | nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) | |
125 | { | |
126 | struct nfs4_ds_server *dss, *new; | |
127 | rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; | |
128 | ||
129 | dss = nfs4_find_ds_client(ds_clp, flavor); | |
130 | if (dss != NULL) | |
131 | goto out; | |
132 | new = nfs4_alloc_ds_server(ds_clp, flavor); | |
133 | if (IS_ERR(new)) | |
134 | return ERR_CAST(new); | |
135 | dss = nfs4_add_ds_client(ds_clp, flavor, new); | |
136 | if (dss != new) | |
137 | nfs4_free_ds_server(new); | |
138 | out: | |
139 | return dss->rpc_clnt; | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); | |
142 | ||
143 | static void | |
144 | nfs4_shutdown_ds_clients(struct nfs_client *clp) | |
145 | { | |
146 | struct nfs4_ds_server *dss; | |
147 | LIST_HEAD(shutdown_list); | |
148 | ||
149 | while (!list_empty(&clp->cl_ds_clients)) { | |
150 | dss = list_entry(clp->cl_ds_clients.next, | |
151 | struct nfs4_ds_server, list); | |
152 | list_del(&dss->list); | |
153 | rpc_shutdown_client(dss->rpc_clnt); | |
154 | kfree (dss); | |
155 | } | |
156 | } | |
157 | ||
abf79bb3 | 158 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
159 | { |
160 | if (nfs4_has_session(clp)) { | |
0e20162e | 161 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
162 | nfs4_destroy_session(clp->cl_session); |
163 | nfs4_destroy_clientid(clp); | |
164 | } | |
165 | ||
166 | } | |
abf79bb3 CL |
167 | #endif /* CONFIG_NFS_V4_1 */ |
168 | ||
169 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 170 | { |
abf79bb3 CL |
171 | if (clp->cl_slot_tbl) { |
172 | nfs4_release_slot_table(clp->cl_slot_tbl); | |
173 | kfree(clp->cl_slot_tbl); | |
174 | } | |
ec409897 | 175 | } |
ec409897 BS |
176 | |
177 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
178 | { | |
179 | int err; | |
180 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
181 | if (IS_ERR(clp)) | |
182 | return clp; | |
183 | ||
184 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
185 | if (err) | |
186 | goto error; | |
187 | ||
42c2c424 SD |
188 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
189 | err = -EINVAL; | |
190 | goto error; | |
191 | } | |
192 | ||
ec409897 BS |
193 | spin_lock_init(&clp->cl_lock); |
194 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 195 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
196 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
197 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
198 | clp->cl_minorversion = cl_init->minorversion; | |
199 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
200 | return clp; | |
201 | ||
202 | error: | |
7653f6ff | 203 | nfs_free_client(clp); |
ec409897 BS |
204 | return ERR_PTR(err); |
205 | } | |
206 | ||
207 | /* | |
208 | * Destroy the NFS4 callback service | |
209 | */ | |
210 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
211 | { | |
212 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 213 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
214 | } |
215 | ||
216 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
217 | { | |
218 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
219 | nfs4_kill_renewd(clp); | |
abf79bb3 | 220 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
221 | nfs4_destroy_callback(clp); |
222 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
223 | nfs_idmap_delete(clp); | |
224 | ||
225 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
226 | kfree(clp->cl_serverowner); | |
227 | kfree(clp->cl_serverscope); | |
228 | kfree(clp->cl_implid); | |
229 | } | |
230 | ||
231 | void nfs4_free_client(struct nfs_client *clp) | |
232 | { | |
233 | nfs4_shutdown_client(clp); | |
234 | nfs_free_client(clp); | |
235 | } | |
236 | ||
428360d7 BS |
237 | /* |
238 | * Initialize the NFS4 callback service | |
239 | */ | |
240 | static int nfs4_init_callback(struct nfs_client *clp) | |
241 | { | |
242 | int error; | |
243 | ||
244 | if (clp->rpc_ops->version == 4) { | |
245 | struct rpc_xprt *xprt; | |
246 | ||
247 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); | |
248 | ||
249 | if (nfs4_has_session(clp)) { | |
250 | error = xprt_setup_backchannel(xprt, | |
251 | NFS41_BC_MIN_CALLBACKS); | |
252 | if (error < 0) | |
253 | return error; | |
254 | } | |
255 | ||
256 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
257 | if (error < 0) { | |
258 | dprintk("%s: failed to start callback. Error = %d\n", | |
259 | __func__, error); | |
260 | return error; | |
261 | } | |
262 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
263 | } | |
264 | return 0; | |
265 | } | |
266 | ||
abf79bb3 CL |
267 | /** |
268 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
269 | * @clp - nfs_client to initialize | |
270 | * | |
271 | * Returns zero on success, or a negative errno if some error occurred. | |
272 | */ | |
273 | int nfs40_init_client(struct nfs_client *clp) | |
274 | { | |
275 | struct nfs4_slot_table *tbl; | |
276 | int ret; | |
277 | ||
278 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
279 | if (tbl == NULL) | |
280 | return -ENOMEM; | |
281 | ||
282 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
283 | "NFSv4.0 transport Slot table"); | |
284 | if (ret) { | |
285 | kfree(tbl); | |
286 | return ret; | |
287 | } | |
288 | ||
289 | clp->cl_slot_tbl = tbl; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | #if defined(CONFIG_NFS_V4_1) | |
294 | ||
295 | /** | |
296 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
297 | * @clp - nfs_client to initialize | |
298 | * | |
299 | * Returns zero on success, or a negative errno if some error occurred. | |
300 | */ | |
301 | int nfs41_init_client(struct nfs_client *clp) | |
302 | { | |
303 | struct nfs4_session *session = NULL; | |
304 | ||
305 | /* | |
306 | * Create the session and mark it expired. | |
307 | * When a SEQUENCE operation encounters the expired session | |
308 | * it will do session recovery to initialize it. | |
309 | */ | |
310 | session = nfs4_alloc_session(clp); | |
311 | if (!session) | |
312 | return -ENOMEM; | |
313 | ||
314 | clp->cl_session = session; | |
315 | ||
316 | /* | |
317 | * The create session reply races with the server back | |
318 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
319 | * so that the client back channel can find the | |
320 | * nfs_client struct | |
321 | */ | |
322 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | #endif /* CONFIG_NFS_V4_1 */ | |
327 | ||
428360d7 BS |
328 | /* |
329 | * Initialize the minor version specific parts of an NFS4 client record | |
330 | */ | |
331 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
332 | { | |
abf79bb3 | 333 | int ret; |
428360d7 | 334 | |
abf79bb3 CL |
335 | ret = clp->cl_mvops->init_client(clp); |
336 | if (ret) | |
337 | return ret; | |
428360d7 BS |
338 | return nfs4_init_callback(clp); |
339 | } | |
340 | ||
341 | /** | |
342 | * nfs4_init_client - Initialise an NFS4 client record | |
343 | * | |
344 | * @clp: nfs_client to initialise | |
345 | * @timeparms: timeout parameters for underlying RPC transport | |
346 | * @ip_addr: callback IP address in presentation format | |
347 | * @authflavor: authentication flavor for underlying RPC transport | |
348 | * | |
349 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
350 | */ | |
351 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
352 | const struct rpc_timeout *timeparms, | |
f8407299 | 353 | const char *ip_addr) |
428360d7 BS |
354 | { |
355 | char buf[INET6_ADDRSTRLEN + 1]; | |
05f4c350 | 356 | struct nfs_client *old; |
428360d7 BS |
357 | int error; |
358 | ||
359 | if (clp->cl_cons_state == NFS_CS_READY) { | |
360 | /* the client is initialised already */ | |
361 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
362 | return clp; | |
363 | } | |
364 | ||
365 | /* Check NFS protocol revision and initialize RPC op vector */ | |
366 | clp->rpc_ops = &nfs_v4_clientops; | |
367 | ||
98f98cf5 TM |
368 | if (clp->cl_minorversion != 0) |
369 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 370 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
99875249 | 371 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
4edaa308 | 372 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I); |
23631227 | 373 | if (error == -EINVAL) |
83c168bf | 374 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
428360d7 BS |
375 | if (error < 0) |
376 | goto error; | |
377 | ||
378 | /* If no clientaddr= option was specified, find a usable cb address */ | |
379 | if (ip_addr == NULL) { | |
380 | struct sockaddr_storage cb_addr; | |
381 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
382 | ||
383 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
384 | if (error < 0) | |
385 | goto error; | |
386 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
387 | if (error < 0) | |
388 | goto error; | |
389 | ip_addr = (const char *)buf; | |
390 | } | |
391 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
392 | ||
393 | error = nfs_idmap_new(clp); | |
394 | if (error < 0) { | |
395 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
396 | __func__, error); | |
397 | goto error; | |
398 | } | |
399 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
400 | ||
401 | error = nfs4_init_client_minor_version(clp); | |
402 | if (error < 0) | |
403 | goto error; | |
404 | ||
405 | if (!nfs4_has_session(clp)) | |
406 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
05f4c350 CL |
407 | |
408 | error = nfs4_discover_server_trunking(clp, &old); | |
409 | if (error < 0) | |
410 | goto error; | |
4ae19c2d | 411 | nfs_put_client(clp); |
05f4c350 CL |
412 | if (clp != old) { |
413 | clp->cl_preserve_clid = true; | |
05f4c350 | 414 | clp = old; |
05f4c350 CL |
415 | } |
416 | ||
428360d7 BS |
417 | return clp; |
418 | ||
419 | error: | |
420 | nfs_mark_client_ready(clp, error); | |
421 | nfs_put_client(clp); | |
422 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
423 | return ERR_PTR(error); | |
424 | } | |
fcf10398 | 425 | |
05f4c350 CL |
426 | /* |
427 | * SETCLIENTID just did a callback update with the callback ident in | |
428 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
429 | * actually the same server. Swap the callback IDs so that "keep" | |
430 | * will continue to use the callback ident the server now knows about, | |
431 | * and so that "keep"'s original callback ident is destroyed when | |
432 | * "drop" is freed. | |
433 | */ | |
434 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
435 | struct nfs_client *drop) | |
436 | { | |
437 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
438 | unsigned int save = keep->cl_cb_ident; | |
439 | ||
440 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
441 | return; | |
442 | ||
443 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
444 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
445 | ||
446 | spin_lock(&nn->nfs_client_lock); | |
447 | ||
448 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
449 | keep->cl_cb_ident = drop->cl_cb_ident; | |
450 | ||
451 | idr_replace(&nn->cb_ident_idr, drop, save); | |
452 | drop->cl_cb_ident = save; | |
453 | ||
454 | spin_unlock(&nn->nfs_client_lock); | |
455 | } | |
456 | ||
457 | /** | |
458 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
459 | * | |
460 | * @new: nfs_client with client ID to test | |
461 | * @result: OUT: found nfs_client, or new | |
462 | * @cred: credential to use for trunking test | |
463 | * | |
464 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
465 | * If zero is returned, an nfs_client pointer is planted in "result." | |
466 | * | |
467 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
468 | * the last nfs_client on the list. | |
469 | */ | |
470 | int nfs40_walk_client_list(struct nfs_client *new, | |
471 | struct nfs_client **result, | |
472 | struct rpc_cred *cred) | |
473 | { | |
474 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 475 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
476 | struct nfs4_setclientid_res clid = { |
477 | .clientid = new->cl_clientid, | |
478 | .confirm = new->cl_confirm, | |
479 | }; | |
4ae19c2d | 480 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
481 | |
482 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 483 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
05f4c350 CL |
484 | /* If "pos" isn't marked ready, we can't trust the |
485 | * remaining fields in "pos" */ | |
7b1f1fd1 TM |
486 | if (pos->cl_cons_state > NFS_CS_READY) { |
487 | atomic_inc(&pos->cl_count); | |
488 | spin_unlock(&nn->nfs_client_lock); | |
489 | ||
490 | if (prev) | |
491 | nfs_put_client(prev); | |
492 | prev = pos; | |
493 | ||
494 | status = nfs_wait_client_init_complete(pos); | |
495 | spin_lock(&nn->nfs_client_lock); | |
496 | if (status < 0) | |
497 | continue; | |
498 | } | |
499 | if (pos->cl_cons_state != NFS_CS_READY) | |
05f4c350 CL |
500 | continue; |
501 | ||
502 | if (pos->rpc_ops != new->rpc_ops) | |
503 | continue; | |
504 | ||
505 | if (pos->cl_proto != new->cl_proto) | |
506 | continue; | |
507 | ||
508 | if (pos->cl_minorversion != new->cl_minorversion) | |
509 | continue; | |
510 | ||
511 | if (pos->cl_clientid != new->cl_clientid) | |
512 | continue; | |
513 | ||
514 | atomic_inc(&pos->cl_count); | |
515 | spin_unlock(&nn->nfs_client_lock); | |
516 | ||
517 | if (prev) | |
518 | nfs_put_client(prev); | |
4ae19c2d | 519 | prev = pos; |
05f4c350 CL |
520 | |
521 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
522 | switch (status) { |
523 | case -NFS4ERR_STALE_CLIENTID: | |
524 | break; | |
525 | case 0: | |
05f4c350 CL |
526 | nfs4_swap_callback_idents(pos, new); |
527 | ||
4ae19c2d | 528 | prev = NULL; |
05f4c350 CL |
529 | *result = pos; |
530 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", | |
531 | __func__, pos, atomic_read(&pos->cl_count)); | |
4ae19c2d TM |
532 | default: |
533 | goto out; | |
05f4c350 CL |
534 | } |
535 | ||
536 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 537 | } |
4ae19c2d | 538 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 539 | |
202c312d | 540 | /* No match found. The server lost our clientid */ |
4ae19c2d | 541 | out: |
05f4c350 CL |
542 | if (prev) |
543 | nfs_put_client(prev); | |
4ae19c2d TM |
544 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
545 | return status; | |
05f4c350 CL |
546 | } |
547 | ||
548 | #ifdef CONFIG_NFS_V4_1 | |
f9d640f3 TM |
549 | /* |
550 | * Returns true if the client IDs match | |
551 | */ | |
552 | static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b) | |
553 | { | |
554 | if (a->cl_clientid != b->cl_clientid) { | |
555 | dprintk("NFS: --> %s client ID %llx does not match %llx\n", | |
556 | __func__, a->cl_clientid, b->cl_clientid); | |
557 | return false; | |
558 | } | |
559 | dprintk("NFS: --> %s client ID %llx matches %llx\n", | |
560 | __func__, a->cl_clientid, b->cl_clientid); | |
561 | return true; | |
562 | } | |
563 | ||
05f4c350 CL |
564 | /* |
565 | * Returns true if the server owners match | |
566 | */ | |
567 | static bool | |
568 | nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b) | |
569 | { | |
570 | struct nfs41_server_owner *o1 = a->cl_serverowner; | |
571 | struct nfs41_server_owner *o2 = b->cl_serverowner; | |
572 | ||
573 | if (o1->minor_id != o2->minor_id) { | |
574 | dprintk("NFS: --> %s server owner minor IDs do not match\n", | |
575 | __func__); | |
576 | return false; | |
577 | } | |
578 | ||
579 | if (o1->major_id_sz != o2->major_id_sz) | |
580 | goto out_major_mismatch; | |
581 | if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0) | |
582 | goto out_major_mismatch; | |
583 | ||
584 | dprintk("NFS: --> %s server owners match\n", __func__); | |
585 | return true; | |
586 | ||
587 | out_major_mismatch: | |
588 | dprintk("NFS: --> %s server owner major IDs do not match\n", | |
589 | __func__); | |
590 | return false; | |
591 | } | |
592 | ||
593 | /** | |
594 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
595 | * | |
596 | * @new: nfs_client with client ID to test | |
597 | * @result: OUT: found nfs_client, or new | |
598 | * @cred: credential to use for trunking test | |
599 | * | |
600 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
601 | * If zero is returned, an nfs_client pointer is planted in "result." | |
602 | * | |
603 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
604 | * the last nfs_client on the list. | |
605 | */ | |
606 | int nfs41_walk_client_list(struct nfs_client *new, | |
607 | struct nfs_client **result, | |
608 | struct rpc_cred *cred) | |
609 | { | |
610 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 611 | struct nfs_client *pos, *prev = NULL; |
202c312d | 612 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
613 | |
614 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 615 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
05f4c350 CL |
616 | /* If "pos" isn't marked ready, we can't trust the |
617 | * remaining fields in "pos", especially the client | |
618 | * ID and serverowner fields. Wait for CREATE_SESSION | |
619 | * to finish. */ | |
7b1f1fd1 | 620 | if (pos->cl_cons_state > NFS_CS_READY) { |
05f4c350 CL |
621 | atomic_inc(&pos->cl_count); |
622 | spin_unlock(&nn->nfs_client_lock); | |
623 | ||
624 | if (prev) | |
625 | nfs_put_client(prev); | |
626 | prev = pos; | |
627 | ||
202c312d | 628 | status = nfs_wait_client_init_complete(pos); |
7b1f1fd1 TM |
629 | if (status == 0) { |
630 | nfs4_schedule_lease_recovery(pos); | |
631 | status = nfs4_wait_clnt_recover(pos); | |
05f4c350 | 632 | } |
05f4c350 | 633 | spin_lock(&nn->nfs_client_lock); |
65436ec0 TM |
634 | if (status < 0) |
635 | continue; | |
05f4c350 | 636 | } |
7b1f1fd1 TM |
637 | if (pos->cl_cons_state != NFS_CS_READY) |
638 | continue; | |
05f4c350 CL |
639 | |
640 | if (pos->rpc_ops != new->rpc_ops) | |
641 | continue; | |
642 | ||
643 | if (pos->cl_proto != new->cl_proto) | |
644 | continue; | |
645 | ||
646 | if (pos->cl_minorversion != new->cl_minorversion) | |
647 | continue; | |
648 | ||
649 | if (!nfs4_match_clientids(pos, new)) | |
650 | continue; | |
651 | ||
652 | if (!nfs4_match_serverowners(pos, new)) | |
653 | continue; | |
654 | ||
4ae19c2d | 655 | atomic_inc(&pos->cl_count); |
7b1f1fd1 | 656 | *result = pos; |
eb04e0ac | 657 | status = 0; |
05f4c350 CL |
658 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", |
659 | __func__, pos, atomic_read(&pos->cl_count)); | |
7b1f1fd1 | 660 | break; |
05f4c350 CL |
661 | } |
662 | ||
202c312d | 663 | /* No matching nfs_client found. */ |
05f4c350 | 664 | spin_unlock(&nn->nfs_client_lock); |
202c312d | 665 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
7b1f1fd1 TM |
666 | if (prev) |
667 | nfs_put_client(prev); | |
202c312d | 668 | return status; |
05f4c350 CL |
669 | } |
670 | #endif /* CONFIG_NFS_V4_1 */ | |
671 | ||
fcf10398 BS |
672 | static void nfs4_destroy_server(struct nfs_server *server) |
673 | { | |
674 | nfs_server_return_all_delegations(server); | |
675 | unset_pnfs_layoutdriver(server); | |
676 | nfs4_purge_state_owners(server); | |
677 | } | |
678 | ||
679 | /* | |
680 | * NFSv4.0 callback thread helper | |
681 | * | |
682 | * Find a client by callback identifier | |
683 | */ | |
684 | struct nfs_client * | |
685 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
686 | { | |
687 | struct nfs_client *clp; | |
688 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
689 | ||
690 | spin_lock(&nn->nfs_client_lock); | |
691 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
692 | if (clp) | |
693 | atomic_inc(&clp->cl_count); | |
694 | spin_unlock(&nn->nfs_client_lock); | |
695 | return clp; | |
696 | } | |
697 | ||
698 | #if defined(CONFIG_NFS_V4_1) | |
699 | /* Common match routine for v4.0 and v4.1 callback services */ | |
700 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
701 | struct nfs_client *clp, u32 minorversion) | |
702 | { | |
703 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
704 | ||
705 | /* Don't match clients that failed to initialise */ | |
706 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
707 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
708 | return false; | |
709 | ||
710 | smp_rmb(); | |
711 | ||
712 | /* Match the version and minorversion */ | |
713 | if (clp->rpc_ops->version != 4 || | |
714 | clp->cl_minorversion != minorversion) | |
715 | return false; | |
716 | ||
717 | /* Match only the IP address, not the port number */ | |
718 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
719 | return false; | |
720 | ||
721 | return true; | |
722 | } | |
723 | ||
724 | /* | |
725 | * NFSv4.1 callback thread helper | |
726 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
727 | * minorversion, and sessionID | |
728 | * | |
729 | * Returns NULL if no such client | |
730 | */ | |
731 | struct nfs_client * | |
732 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 733 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
734 | { |
735 | struct nfs_client *clp; | |
736 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
737 | ||
738 | spin_lock(&nn->nfs_client_lock); | |
739 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
459de2ed | 740 | if (nfs4_cb_match_client(addr, clp, minorversion) == false) |
fcf10398 BS |
741 | continue; |
742 | ||
743 | if (!nfs4_has_session(clp)) | |
744 | continue; | |
745 | ||
746 | /* Match sessionid*/ | |
747 | if (memcmp(clp->cl_session->sess_id.data, | |
748 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
749 | continue; | |
750 | ||
751 | atomic_inc(&clp->cl_count); | |
752 | spin_unlock(&nn->nfs_client_lock); | |
753 | return clp; | |
754 | } | |
755 | spin_unlock(&nn->nfs_client_lock); | |
756 | return NULL; | |
757 | } | |
758 | ||
759 | #else /* CONFIG_NFS_V4_1 */ | |
760 | ||
761 | struct nfs_client * | |
762 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 763 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
764 | { |
765 | return NULL; | |
766 | } | |
767 | #endif /* CONFIG_NFS_V4_1 */ | |
768 | ||
769 | /* | |
770 | * Set up an NFS4 client | |
771 | */ | |
772 | static int nfs4_set_client(struct nfs_server *server, | |
773 | const char *hostname, | |
774 | const struct sockaddr *addr, | |
775 | const size_t addrlen, | |
776 | const char *ip_addr, | |
777 | rpc_authflavor_t authflavour, | |
778 | int proto, const struct rpc_timeout *timeparms, | |
779 | u32 minorversion, struct net *net) | |
780 | { | |
781 | struct nfs_client_initdata cl_init = { | |
782 | .hostname = hostname, | |
783 | .addr = addr, | |
784 | .addrlen = addrlen, | |
ab7017a3 | 785 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
786 | .proto = proto, |
787 | .minorversion = minorversion, | |
788 | .net = net, | |
789 | }; | |
790 | struct nfs_client *clp; | |
791 | int error; | |
792 | ||
793 | dprintk("--> nfs4_set_client()\n"); | |
794 | ||
795 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
796 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
797 | if (server->options & NFS_OPTION_MIGRATION) |
798 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
fcf10398 BS |
799 | |
800 | /* Allocate or find a client reference we can use */ | |
801 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour); | |
802 | if (IS_ERR(clp)) { | |
803 | error = PTR_ERR(clp); | |
804 | goto error; | |
805 | } | |
806 | ||
807 | /* | |
808 | * Query for the lease time on clientid setup or renewal | |
809 | * | |
810 | * Note that this will be set on nfs_clients that were created | |
811 | * only for the DS role and did not set this bit, but now will | |
812 | * serve a dual role. | |
813 | */ | |
814 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
815 | ||
816 | server->nfs_client = clp; | |
817 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
818 | return 0; | |
819 | error: | |
820 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
821 | return error; | |
822 | } | |
823 | ||
824 | /* | |
825 | * Set up a pNFS Data Server client. | |
826 | * | |
827 | * Return any existing nfs_client that matches server address,port,version | |
828 | * and minorversion. | |
829 | * | |
830 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
831 | * low timeout interval so that if a connection is lost, we retry through | |
832 | * the MDS. | |
833 | */ | |
834 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
835 | const struct sockaddr *ds_addr, int ds_addrlen, | |
836 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) | |
837 | { | |
838 | struct nfs_client_initdata cl_init = { | |
839 | .addr = ds_addr, | |
840 | .addrlen = ds_addrlen, | |
ab7017a3 | 841 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
842 | .proto = ds_proto, |
843 | .minorversion = mds_clp->cl_minorversion, | |
844 | .net = mds_clp->cl_net, | |
845 | }; | |
846 | struct rpc_timeout ds_timeout; | |
847 | struct nfs_client *clp; | |
848 | ||
849 | /* | |
850 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
851 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
852 | * (section 13.1 RFC 5661). | |
853 | */ | |
854 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
855 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
856 | mds_clp->cl_rpcclient->cl_auth->au_flavor); | |
857 | ||
858 | dprintk("<-- %s %p\n", __func__, clp); | |
859 | return clp; | |
860 | } | |
861 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
862 | ||
863 | /* | |
864 | * Session has been established, and the client marked ready. | |
865 | * Set the mount rsize and wsize with negotiated fore channel | |
866 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
867 | */ | |
868 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
869 | { | |
870 | #ifdef CONFIG_NFS_V4_1 | |
871 | struct nfs4_session *sess; | |
872 | u32 server_resp_sz; | |
873 | u32 server_rqst_sz; | |
874 | ||
875 | if (!nfs4_has_session(server->nfs_client)) | |
876 | return; | |
877 | sess = server->nfs_client->cl_session; | |
878 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
879 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
880 | ||
881 | if (server->rsize > server_resp_sz) | |
882 | server->rsize = server_resp_sz; | |
883 | if (server->wsize > server_rqst_sz) | |
884 | server->wsize = server_rqst_sz; | |
885 | #endif /* CONFIG_NFS_V4_1 */ | |
886 | } | |
887 | ||
888 | static int nfs4_server_common_setup(struct nfs_server *server, | |
5e6b1990 | 889 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 BS |
890 | { |
891 | struct nfs_fattr *fattr; | |
892 | int error; | |
893 | ||
fcf10398 BS |
894 | /* data servers support only a subset of NFSv4.1 */ |
895 | if (is_ds_only_client(server->nfs_client)) | |
896 | return -EPROTONOSUPPORT; | |
897 | ||
898 | fattr = nfs_alloc_fattr(); | |
899 | if (fattr == NULL) | |
900 | return -ENOMEM; | |
901 | ||
902 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 903 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
904 | if (error < 0) |
905 | goto out; | |
906 | ||
39c6daae TM |
907 | /* Set the basic capabilities */ |
908 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
909 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
910 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
911 | /* | |
912 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
913 | * authentication. | |
914 | */ | |
915 | if (nfs4_disable_idmapping && | |
916 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
917 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
918 | ||
919 | ||
fcf10398 | 920 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 921 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
922 | if (error < 0) |
923 | goto out; | |
924 | ||
925 | dprintk("Server FSID: %llx:%llx\n", | |
926 | (unsigned long long) server->fsid.major, | |
927 | (unsigned long long) server->fsid.minor); | |
928 | dprintk("Mount FH: %d\n", mntfh->size); | |
929 | ||
930 | nfs4_session_set_rwsize(server); | |
931 | ||
932 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
933 | if (error < 0) | |
934 | goto out; | |
935 | ||
936 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
937 | server->namelen = NFS4_MAXNAMLEN; | |
938 | ||
939 | nfs_server_insert_lists(server); | |
940 | server->mount_time = jiffies; | |
941 | server->destroy = nfs4_destroy_server; | |
942 | out: | |
943 | nfs_free_fattr(fattr); | |
944 | return error; | |
945 | } | |
946 | ||
947 | /* | |
948 | * Create a version 4 volume record | |
949 | */ | |
950 | static int nfs4_init_server(struct nfs_server *server, | |
951 | const struct nfs_parsed_mount_data *data) | |
952 | { | |
5e6b1990 | 953 | rpc_authflavor_t pseudoflavor = RPC_AUTH_UNIX; |
fcf10398 BS |
954 | struct rpc_timeout timeparms; |
955 | int error; | |
956 | ||
957 | dprintk("--> nfs4_init_server()\n"); | |
958 | ||
959 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
960 | data->timeo, data->retrans); | |
961 | ||
962 | /* Initialise the client representation from the mount data */ | |
963 | server->flags = data->flags; | |
fcf10398 BS |
964 | server->options = data->options; |
965 | ||
5e6b1990 TM |
966 | if (data->auth_flavor_len >= 1) |
967 | pseudoflavor = data->auth_flavors[0]; | |
968 | ||
fcf10398 BS |
969 | /* Get a client record */ |
970 | error = nfs4_set_client(server, | |
971 | data->nfs_server.hostname, | |
972 | (const struct sockaddr *)&data->nfs_server.address, | |
973 | data->nfs_server.addrlen, | |
974 | data->client_address, | |
5e6b1990 | 975 | pseudoflavor, |
fcf10398 BS |
976 | data->nfs_server.protocol, |
977 | &timeparms, | |
978 | data->minorversion, | |
979 | data->net); | |
980 | if (error < 0) | |
981 | goto error; | |
982 | ||
fcf10398 BS |
983 | if (data->rsize) |
984 | server->rsize = nfs_block_size(data->rsize, NULL); | |
985 | if (data->wsize) | |
986 | server->wsize = nfs_block_size(data->wsize, NULL); | |
987 | ||
988 | server->acregmin = data->acregmin * HZ; | |
989 | server->acregmax = data->acregmax * HZ; | |
990 | server->acdirmin = data->acdirmin * HZ; | |
991 | server->acdirmax = data->acdirmax * HZ; | |
992 | ||
993 | server->port = data->nfs_server.port; | |
994 | ||
5e6b1990 | 995 | error = nfs_init_server_rpcclient(server, &timeparms, pseudoflavor); |
fcf10398 BS |
996 | |
997 | error: | |
998 | /* Done */ | |
999 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1000 | return error; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Create a version 4 volume record | |
1005 | * - keyed on server and FSID | |
1006 | */ | |
1179acc6 BS |
1007 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
1008 | struct nfs_fh *mntfh)*/ | |
1009 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
1010 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
1011 | { |
1012 | struct nfs_server *server; | |
5e6b1990 | 1013 | bool auth_probe; |
fcf10398 BS |
1014 | int error; |
1015 | ||
1016 | dprintk("--> nfs4_create_server()\n"); | |
1017 | ||
1018 | server = nfs_alloc_server(); | |
1019 | if (!server) | |
1020 | return ERR_PTR(-ENOMEM); | |
1021 | ||
5e6b1990 TM |
1022 | auth_probe = mount_info->parsed->auth_flavor_len < 1; |
1023 | ||
fcf10398 | 1024 | /* set up the general RPC client */ |
1179acc6 | 1025 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
1026 | if (error < 0) |
1027 | goto error; | |
1028 | ||
5e6b1990 | 1029 | error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); |
fcf10398 BS |
1030 | if (error < 0) |
1031 | goto error; | |
1032 | ||
1033 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1034 | return server; | |
1035 | ||
1036 | error: | |
1037 | nfs_free_server(server); | |
1038 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1039 | return ERR_PTR(error); | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Create an NFS4 referral server record | |
1044 | */ | |
1045 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1046 | struct nfs_fh *mntfh) | |
1047 | { | |
1048 | struct nfs_client *parent_client; | |
1049 | struct nfs_server *server, *parent_server; | |
1050 | int error; | |
1051 | ||
1052 | dprintk("--> nfs4_create_referral_server()\n"); | |
1053 | ||
1054 | server = nfs_alloc_server(); | |
1055 | if (!server) | |
1056 | return ERR_PTR(-ENOMEM); | |
1057 | ||
1058 | parent_server = NFS_SB(data->sb); | |
1059 | parent_client = parent_server->nfs_client; | |
1060 | ||
1061 | /* Initialise the client representation from the parent server */ | |
1062 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 BS |
1063 | |
1064 | /* Get a client representation. | |
1065 | * Note: NFSv4 always uses TCP, */ | |
1066 | error = nfs4_set_client(server, data->hostname, | |
1067 | data->addr, | |
1068 | data->addrlen, | |
1069 | parent_client->cl_ipaddr, | |
1070 | data->authflavor, | |
1071 | rpc_protocol(parent_server->client), | |
1072 | parent_server->client->cl_timeout, | |
1073 | parent_client->cl_mvops->minor_version, | |
1074 | parent_client->cl_net); | |
1075 | if (error < 0) | |
1076 | goto error; | |
1077 | ||
1078 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
1079 | if (error < 0) | |
1080 | goto error; | |
1081 | ||
47040da3 TM |
1082 | error = nfs4_server_common_setup(server, mntfh, |
1083 | !(parent_server->flags & NFS_MOUNT_SECFLAVOUR)); | |
fcf10398 BS |
1084 | if (error < 0) |
1085 | goto error; | |
1086 | ||
1087 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1088 | return server; | |
1089 | ||
1090 | error: | |
1091 | nfs_free_server(server); | |
1092 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1093 | return ERR_PTR(error); | |
1094 | } | |
32e62b7c CL |
1095 | |
1096 | /* | |
1097 | * Grab the destination's particulars, including lease expiry time. | |
1098 | * | |
1099 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
1100 | * we have cached. | |
1101 | */ | |
1102 | static int nfs_probe_destination(struct nfs_server *server) | |
1103 | { | |
1104 | struct inode *inode = server->super->s_root->d_inode; | |
1105 | struct nfs_fattr *fattr; | |
1106 | int error; | |
1107 | ||
1108 | fattr = nfs_alloc_fattr(); | |
1109 | if (fattr == NULL) | |
1110 | return -ENOMEM; | |
1111 | ||
1112 | /* Sanity: the probe won't work if the destination server | |
1113 | * does not recognize the migrated FH. */ | |
1114 | error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); | |
1115 | ||
1116 | nfs_free_fattr(fattr); | |
1117 | return error; | |
1118 | } | |
1119 | ||
1120 | /** | |
1121 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1122 | * | |
1123 | * @server: represents FSID to be moved | |
1124 | * @hostname: new end-point's hostname | |
1125 | * @sap: new end-point's socket address | |
1126 | * @salen: size of "sap" | |
1127 | * | |
1128 | * The nfs_server must be quiescent before this function is invoked. | |
1129 | * Either its session is drained (NFSv4.1+), or its transport is | |
1130 | * plugged and drained (NFSv4.0). | |
1131 | * | |
1132 | * Returns zero on success, or a negative errno value. | |
1133 | */ | |
1134 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
1135 | struct sockaddr *sap, size_t salen) | |
1136 | { | |
1137 | struct nfs_client *clp = server->nfs_client; | |
1138 | struct rpc_clnt *clnt = server->client; | |
1139 | struct xprt_create xargs = { | |
1140 | .ident = clp->cl_proto, | |
1141 | .net = &init_net, | |
1142 | .dstaddr = sap, | |
1143 | .addrlen = salen, | |
1144 | .servername = hostname, | |
1145 | }; | |
1146 | char buf[INET6_ADDRSTRLEN + 1]; | |
1147 | struct sockaddr_storage address; | |
1148 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1149 | int error; | |
1150 | ||
1151 | dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__, | |
1152 | (unsigned long long)server->fsid.major, | |
1153 | (unsigned long long)server->fsid.minor, | |
1154 | hostname); | |
1155 | ||
1156 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); | |
1157 | if (error != 0) { | |
1158 | dprintk("<-- %s(): rpc_switch_client_transport returned %d\n", | |
1159 | __func__, error); | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
1164 | if (error != 0) { | |
1165 | dprintk("<-- %s(): rpc_localaddr returned %d\n", | |
1166 | __func__, error); | |
1167 | goto out; | |
1168 | } | |
1169 | ||
1170 | error = -EAFNOSUPPORT; | |
1171 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) { | |
1172 | dprintk("<-- %s(): rpc_ntop returned %d\n", | |
1173 | __func__, error); | |
1174 | goto out; | |
1175 | } | |
1176 | ||
1177 | nfs_server_remove_lists(server); | |
1178 | error = nfs4_set_client(server, hostname, sap, salen, buf, | |
1179 | clp->cl_rpcclient->cl_auth->au_flavor, | |
1180 | clp->cl_proto, clnt->cl_timeout, | |
1181 | clp->cl_minorversion, clp->cl_net); | |
1182 | nfs_put_client(clp); | |
1183 | if (error != 0) { | |
1184 | nfs_server_insert_lists(server); | |
1185 | dprintk("<-- %s(): nfs4_set_client returned %d\n", | |
1186 | __func__, error); | |
1187 | goto out; | |
1188 | } | |
1189 | ||
1190 | if (server->nfs_client->cl_hostname == NULL) | |
1191 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
1192 | nfs_server_insert_lists(server); | |
1193 | ||
1194 | error = nfs_probe_destination(server); | |
1195 | if (error < 0) | |
1196 | goto out; | |
1197 | ||
1198 | dprintk("<-- %s() succeeded\n", __func__); | |
1199 | ||
1200 | out: | |
1201 | return error; | |
1202 | } |