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Commit | Line | Data |
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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 | 6 | #include <linux/nfs_fs.h> |
fcf10398 | 7 | #include <linux/nfs_mount.h> |
5976687a | 8 | #include <linux/sunrpc/addr.h> |
428360d7 BS |
9 | #include <linux/sunrpc/auth.h> |
10 | #include <linux/sunrpc/xprt.h> | |
11 | #include <linux/sunrpc/bc_xprt.h> | |
6aa23d76 | 12 | #include <linux/sunrpc/rpc_pipe_fs.h> |
428360d7 BS |
13 | #include "internal.h" |
14 | #include "callback.h" | |
fcf10398 | 15 | #include "delegation.h" |
73e39aaa | 16 | #include "nfs4session.h" |
40c64c26 | 17 | #include "nfs4idmap.h" |
fcf10398 BS |
18 | #include "pnfs.h" |
19 | #include "netns.h" | |
428360d7 BS |
20 | |
21 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
22 | ||
ec409897 BS |
23 | /* |
24 | * Get a unique NFSv4.0 callback identifier which will be used | |
25 | * by the V4.0 callback service to lookup the nfs_client struct | |
26 | */ | |
27 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
28 | { | |
29 | int ret = 0; | |
30 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
31 | ||
32 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
33 | return ret; | |
d6870312 | 34 | idr_preload(GFP_KERNEL); |
ec409897 | 35 | spin_lock(&nn->nfs_client_lock); |
c68a027c | 36 | ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); |
d6870312 TH |
37 | if (ret >= 0) |
38 | clp->cl_cb_ident = ret; | |
ec409897 | 39 | spin_unlock(&nn->nfs_client_lock); |
d6870312 TH |
40 | idr_preload_end(); |
41 | return ret < 0 ? ret : 0; | |
ec409897 BS |
42 | } |
43 | ||
44 | #ifdef CONFIG_NFS_V4_1 | |
0e20162e AA |
45 | /** |
46 | * Per auth flavor data server rpc clients | |
47 | */ | |
48 | struct nfs4_ds_server { | |
49 | struct list_head list; /* ds_clp->cl_ds_clients */ | |
50 | struct rpc_clnt *rpc_clnt; | |
51 | }; | |
52 | ||
53 | /** | |
54 | * Common lookup case for DS I/O | |
55 | */ | |
56 | static struct nfs4_ds_server * | |
57 | nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
58 | { | |
59 | struct nfs4_ds_server *dss; | |
60 | ||
61 | rcu_read_lock(); | |
62 | list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { | |
63 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
64 | continue; | |
65 | goto out; | |
66 | } | |
67 | dss = NULL; | |
68 | out: | |
69 | rcu_read_unlock(); | |
70 | return dss; | |
71 | } | |
72 | ||
73 | static struct nfs4_ds_server * | |
74 | nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, | |
75 | struct nfs4_ds_server *new) | |
76 | { | |
77 | struct nfs4_ds_server *dss; | |
78 | ||
79 | spin_lock(&ds_clp->cl_lock); | |
80 | list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { | |
81 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
82 | continue; | |
83 | goto out; | |
84 | } | |
85 | if (new) | |
86 | list_add_rcu(&new->list, &ds_clp->cl_ds_clients); | |
87 | dss = new; | |
88 | out: | |
89 | spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ | |
90 | return dss; | |
91 | } | |
92 | ||
93 | static struct nfs4_ds_server * | |
94 | nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
95 | { | |
96 | struct nfs4_ds_server *dss; | |
97 | ||
98 | dss = kmalloc(sizeof(*dss), GFP_NOFS); | |
99 | if (dss == NULL) | |
100 | return ERR_PTR(-ENOMEM); | |
101 | ||
102 | dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); | |
103 | if (IS_ERR(dss->rpc_clnt)) { | |
104 | int err = PTR_ERR(dss->rpc_clnt); | |
105 | kfree (dss); | |
106 | return ERR_PTR(err); | |
107 | } | |
108 | INIT_LIST_HEAD(&dss->list); | |
109 | ||
110 | return dss; | |
111 | } | |
112 | ||
113 | static void | |
114 | nfs4_free_ds_server(struct nfs4_ds_server *dss) | |
115 | { | |
116 | rpc_release_client(dss->rpc_clnt); | |
117 | kfree(dss); | |
118 | } | |
119 | ||
120 | /** | |
121 | * Find or create a DS rpc client with th MDS server rpc client auth flavor | |
122 | * in the nfs_client cl_ds_clients list. | |
123 | */ | |
124 | struct rpc_clnt * | |
125 | nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) | |
126 | { | |
127 | struct nfs4_ds_server *dss, *new; | |
128 | rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; | |
129 | ||
130 | dss = nfs4_find_ds_client(ds_clp, flavor); | |
131 | if (dss != NULL) | |
132 | goto out; | |
133 | new = nfs4_alloc_ds_server(ds_clp, flavor); | |
134 | if (IS_ERR(new)) | |
135 | return ERR_CAST(new); | |
136 | dss = nfs4_add_ds_client(ds_clp, flavor, new); | |
137 | if (dss != new) | |
138 | nfs4_free_ds_server(new); | |
139 | out: | |
140 | return dss->rpc_clnt; | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); | |
143 | ||
144 | static void | |
145 | nfs4_shutdown_ds_clients(struct nfs_client *clp) | |
146 | { | |
147 | struct nfs4_ds_server *dss; | |
148 | LIST_HEAD(shutdown_list); | |
149 | ||
150 | while (!list_empty(&clp->cl_ds_clients)) { | |
151 | dss = list_entry(clp->cl_ds_clients.next, | |
152 | struct nfs4_ds_server, list); | |
153 | list_del(&dss->list); | |
154 | rpc_shutdown_client(dss->rpc_clnt); | |
155 | kfree (dss); | |
156 | } | |
157 | } | |
158 | ||
abf79bb3 | 159 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
160 | { |
161 | if (nfs4_has_session(clp)) { | |
0e20162e | 162 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
163 | nfs4_destroy_session(clp->cl_session); |
164 | nfs4_destroy_clientid(clp); | |
165 | } | |
166 | ||
167 | } | |
abf79bb3 CL |
168 | #endif /* CONFIG_NFS_V4_1 */ |
169 | ||
170 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 171 | { |
abf79bb3 | 172 | if (clp->cl_slot_tbl) { |
20b9a902 | 173 | nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
abf79bb3 CL |
174 | kfree(clp->cl_slot_tbl); |
175 | } | |
ec409897 | 176 | } |
ec409897 BS |
177 | |
178 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
179 | { | |
180 | int err; | |
181 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
182 | if (IS_ERR(clp)) | |
183 | return clp; | |
184 | ||
185 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
186 | if (err) | |
187 | goto error; | |
188 | ||
42c2c424 SD |
189 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
190 | err = -EINVAL; | |
191 | goto error; | |
192 | } | |
193 | ||
ec409897 BS |
194 | spin_lock_init(&clp->cl_lock); |
195 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 196 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
197 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
198 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
199 | clp->cl_minorversion = cl_init->minorversion; | |
200 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
c9fdeb28 | 201 | clp->cl_mig_gen = 1; |
a1d617d8 JL |
202 | #if IS_ENABLED(CONFIG_NFS_V4_1) |
203 | init_waitqueue_head(&clp->cl_lock_waitq); | |
204 | #endif | |
ec409897 BS |
205 | return clp; |
206 | ||
207 | error: | |
7653f6ff | 208 | nfs_free_client(clp); |
ec409897 BS |
209 | return ERR_PTR(err); |
210 | } | |
211 | ||
212 | /* | |
213 | * Destroy the NFS4 callback service | |
214 | */ | |
215 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
216 | { | |
217 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 218 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
219 | } |
220 | ||
221 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
222 | { | |
223 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
224 | nfs4_kill_renewd(clp); | |
abf79bb3 | 225 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
226 | nfs4_destroy_callback(clp); |
227 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
228 | nfs_idmap_delete(clp); | |
229 | ||
230 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
231 | kfree(clp->cl_serverowner); | |
232 | kfree(clp->cl_serverscope); | |
233 | kfree(clp->cl_implid); | |
ceb3a16c | 234 | kfree(clp->cl_owner_id); |
ec409897 BS |
235 | } |
236 | ||
237 | void nfs4_free_client(struct nfs_client *clp) | |
238 | { | |
239 | nfs4_shutdown_client(clp); | |
240 | nfs_free_client(clp); | |
241 | } | |
242 | ||
428360d7 BS |
243 | /* |
244 | * Initialize the NFS4 callback service | |
245 | */ | |
246 | static int nfs4_init_callback(struct nfs_client *clp) | |
247 | { | |
c2ef47b7 | 248 | struct rpc_xprt *xprt; |
428360d7 BS |
249 | int error; |
250 | ||
c2ef47b7 | 251 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
428360d7 | 252 | |
c2ef47b7 CL |
253 | if (nfs4_has_session(clp)) { |
254 | error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
255 | if (error < 0) | |
428360d7 | 256 | return error; |
428360d7 | 257 | } |
c2ef47b7 CL |
258 | |
259 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
260 | if (error < 0) { | |
261 | dprintk("%s: failed to start callback. Error = %d\n", | |
262 | __func__, error); | |
263 | return error; | |
264 | } | |
265 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
266 | ||
428360d7 BS |
267 | return 0; |
268 | } | |
269 | ||
abf79bb3 CL |
270 | /** |
271 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
272 | * @clp - nfs_client to initialize | |
273 | * | |
274 | * Returns zero on success, or a negative errno if some error occurred. | |
275 | */ | |
276 | int nfs40_init_client(struct nfs_client *clp) | |
277 | { | |
278 | struct nfs4_slot_table *tbl; | |
279 | int ret; | |
280 | ||
281 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
282 | if (tbl == NULL) | |
283 | return -ENOMEM; | |
284 | ||
285 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
286 | "NFSv4.0 transport Slot table"); | |
287 | if (ret) { | |
288 | kfree(tbl); | |
289 | return ret; | |
290 | } | |
291 | ||
292 | clp->cl_slot_tbl = tbl; | |
293 | return 0; | |
294 | } | |
295 | ||
296 | #if defined(CONFIG_NFS_V4_1) | |
297 | ||
298 | /** | |
299 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
300 | * @clp - nfs_client to initialize | |
301 | * | |
302 | * Returns zero on success, or a negative errno if some error occurred. | |
303 | */ | |
304 | int nfs41_init_client(struct nfs_client *clp) | |
305 | { | |
306 | struct nfs4_session *session = NULL; | |
307 | ||
308 | /* | |
309 | * Create the session and mark it expired. | |
310 | * When a SEQUENCE operation encounters the expired session | |
311 | * it will do session recovery to initialize it. | |
312 | */ | |
313 | session = nfs4_alloc_session(clp); | |
314 | if (!session) | |
315 | return -ENOMEM; | |
316 | ||
317 | clp->cl_session = session; | |
318 | ||
319 | /* | |
320 | * The create session reply races with the server back | |
321 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
322 | * so that the client back channel can find the | |
323 | * nfs_client struct | |
324 | */ | |
325 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | #endif /* CONFIG_NFS_V4_1 */ | |
330 | ||
428360d7 BS |
331 | /* |
332 | * Initialize the minor version specific parts of an NFS4 client record | |
333 | */ | |
334 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
335 | { | |
abf79bb3 | 336 | int ret; |
428360d7 | 337 | |
abf79bb3 CL |
338 | ret = clp->cl_mvops->init_client(clp); |
339 | if (ret) | |
340 | return ret; | |
428360d7 BS |
341 | return nfs4_init_callback(clp); |
342 | } | |
343 | ||
344 | /** | |
345 | * nfs4_init_client - Initialise an NFS4 client record | |
346 | * | |
347 | * @clp: nfs_client to initialise | |
348 | * @timeparms: timeout parameters for underlying RPC transport | |
349 | * @ip_addr: callback IP address in presentation format | |
350 | * @authflavor: authentication flavor for underlying RPC transport | |
351 | * | |
352 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
353 | */ | |
354 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
5c6e5b60 | 355 | const struct nfs_client_initdata *cl_init) |
428360d7 BS |
356 | { |
357 | char buf[INET6_ADDRSTRLEN + 1]; | |
5c6e5b60 | 358 | const char *ip_addr = cl_init->ip_addr; |
05f4c350 | 359 | struct nfs_client *old; |
428360d7 BS |
360 | int error; |
361 | ||
4fe6b366 | 362 | if (clp->cl_cons_state == NFS_CS_READY) |
428360d7 | 363 | /* the client is initialised already */ |
428360d7 | 364 | return clp; |
428360d7 BS |
365 | |
366 | /* Check NFS protocol revision and initialize RPC op vector */ | |
367 | clp->rpc_ops = &nfs_v4_clientops; | |
368 | ||
98f98cf5 TM |
369 | if (clp->cl_minorversion != 0) |
370 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 371 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
99875249 | 372 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
6aa23d76 | 373 | |
5c6e5b60 | 374 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); |
23631227 | 375 | if (error == -EINVAL) |
5c6e5b60 | 376 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
428360d7 BS |
377 | if (error < 0) |
378 | goto error; | |
379 | ||
380 | /* If no clientaddr= option was specified, find a usable cb address */ | |
381 | if (ip_addr == NULL) { | |
382 | struct sockaddr_storage cb_addr; | |
383 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
384 | ||
385 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
386 | if (error < 0) | |
387 | goto error; | |
388 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
389 | if (error < 0) | |
390 | goto error; | |
391 | ip_addr = (const char *)buf; | |
392 | } | |
393 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
394 | ||
395 | error = nfs_idmap_new(clp); | |
396 | if (error < 0) { | |
397 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
398 | __func__, error); | |
399 | goto error; | |
400 | } | |
401 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
402 | ||
403 | error = nfs4_init_client_minor_version(clp); | |
404 | if (error < 0) | |
405 | goto error; | |
406 | ||
407 | if (!nfs4_has_session(clp)) | |
408 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
05f4c350 CL |
409 | |
410 | error = nfs4_discover_server_trunking(clp, &old); | |
411 | if (error < 0) | |
412 | goto error; | |
05f4c350 | 413 | |
abad2fa5 WAA |
414 | if (clp != old) |
415 | clp->cl_preserve_clid = true; | |
416 | nfs_put_client(clp); | |
8dcbec6d | 417 | clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
abad2fa5 | 418 | return old; |
428360d7 BS |
419 | |
420 | error: | |
421 | nfs_mark_client_ready(clp, error); | |
422 | nfs_put_client(clp); | |
428360d7 BS |
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 | ||
55b9df93 TM |
457 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
458 | const struct nfs_client *clp2) | |
459 | { | |
460 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
461 | return true; | |
462 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
463 | } | |
464 | ||
ced85a75 BF |
465 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
466 | { | |
467 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
468 | } | |
469 | ||
14d1bbb0 AS |
470 | static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
471 | struct nfs_client **prev, struct nfs_net *nn) | |
472 | { | |
473 | int status; | |
474 | ||
475 | if (pos->rpc_ops != new->rpc_ops) | |
476 | return 1; | |
477 | ||
478 | if (pos->cl_minorversion != new->cl_minorversion) | |
479 | return 1; | |
480 | ||
481 | /* If "pos" isn't marked ready, we can't trust the | |
482 | * remaining fields in "pos", especially the client | |
483 | * ID and serverowner fields. Wait for CREATE_SESSION | |
484 | * to finish. */ | |
485 | if (pos->cl_cons_state > NFS_CS_READY) { | |
486 | atomic_inc(&pos->cl_count); | |
487 | spin_unlock(&nn->nfs_client_lock); | |
488 | ||
489 | nfs_put_client(*prev); | |
490 | *prev = pos; | |
491 | ||
492 | status = nfs_wait_client_init_complete(pos); | |
493 | spin_lock(&nn->nfs_client_lock); | |
494 | ||
495 | if (status < 0) | |
496 | return status; | |
497 | } | |
498 | ||
499 | if (pos->cl_cons_state != NFS_CS_READY) | |
500 | return 1; | |
501 | ||
502 | if (pos->cl_clientid != new->cl_clientid) | |
503 | return 1; | |
504 | ||
505 | /* NFSv4.1 always uses the uniform string, however someone | |
506 | * might switch the uniquifier string on us. | |
507 | */ | |
508 | if (!nfs4_match_client_owner_id(pos, new)) | |
509 | return 1; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
05f4c350 CL |
514 | /** |
515 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
516 | * | |
517 | * @new: nfs_client with client ID to test | |
518 | * @result: OUT: found nfs_client, or new | |
519 | * @cred: credential to use for trunking test | |
520 | * | |
521 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
522 | * If zero is returned, an nfs_client pointer is planted in "result." | |
523 | * | |
524 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
525 | * the last nfs_client on the list. | |
526 | */ | |
527 | int nfs40_walk_client_list(struct nfs_client *new, | |
528 | struct nfs_client **result, | |
529 | struct rpc_cred *cred) | |
530 | { | |
531 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 532 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
533 | struct nfs4_setclientid_res clid = { |
534 | .clientid = new->cl_clientid, | |
535 | .confirm = new->cl_confirm, | |
536 | }; | |
4ae19c2d | 537 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
538 | |
539 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 540 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 541 | |
14d1bbb0 AS |
542 | status = nfs4_match_client(pos, new, &prev, nn); |
543 | if (status < 0) | |
544 | goto out_unlock; | |
545 | if (status != 0) | |
55b9df93 | 546 | continue; |
ced85a75 BF |
547 | /* |
548 | * We just sent a new SETCLIENTID, which should have | |
549 | * caused the server to return a new cl_confirm. So if | |
550 | * cl_confirm is the same, then this is a different | |
551 | * server that just returned the same cl_confirm by | |
552 | * coincidence: | |
553 | */ | |
554 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
555 | &new->cl_confirm)) | |
556 | continue; | |
557 | /* | |
558 | * But if the cl_confirm's are different, then the only | |
559 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
560 | * if new and pos point to the same server: | |
561 | */ | |
05f4c350 CL |
562 | atomic_inc(&pos->cl_count); |
563 | spin_unlock(&nn->nfs_client_lock); | |
564 | ||
fe0bf118 | 565 | nfs_put_client(prev); |
4ae19c2d | 566 | prev = pos; |
05f4c350 CL |
567 | |
568 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
569 | switch (status) { |
570 | case -NFS4ERR_STALE_CLIENTID: | |
571 | break; | |
572 | case 0: | |
05f4c350 | 573 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 574 | pos->cl_confirm = new->cl_confirm; |
05f4c350 | 575 | |
4ae19c2d | 576 | prev = NULL; |
05f4c350 | 577 | *result = pos; |
f9b7ebdf TM |
578 | goto out; |
579 | case -ERESTARTSYS: | |
580 | case -ETIMEDOUT: | |
581 | /* The callback path may have been inadvertently | |
582 | * changed. Schedule recovery! | |
583 | */ | |
584 | nfs4_schedule_path_down_recovery(pos); | |
4ae19c2d TM |
585 | default: |
586 | goto out; | |
05f4c350 CL |
587 | } |
588 | ||
589 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 590 | } |
14d1bbb0 | 591 | out_unlock: |
4ae19c2d | 592 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 593 | |
202c312d | 594 | /* No match found. The server lost our clientid */ |
4ae19c2d | 595 | out: |
fe0bf118 | 596 | nfs_put_client(prev); |
4ae19c2d | 597 | return status; |
05f4c350 CL |
598 | } |
599 | ||
600 | #ifdef CONFIG_NFS_V4_1 | |
601 | /* | |
1fc0703a | 602 | * Returns true if the server major ids match |
05f4c350 CL |
603 | */ |
604 | static bool | |
e7b7cbf6 AA |
605 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
606 | struct nfs41_server_owner *o2) | |
05f4c350 | 607 | { |
05f4c350 | 608 | if (o1->major_id_sz != o2->major_id_sz) |
ddfa0d48 AS |
609 | return false; |
610 | return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; | |
05f4c350 CL |
611 | } |
612 | ||
ba84db96 AA |
613 | /* |
614 | * Returns true if the server scopes match | |
615 | */ | |
616 | static bool | |
617 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
618 | struct nfs41_server_scope *s2) | |
619 | { | |
620 | if (s1->server_scope_sz != s2->server_scope_sz) | |
8da0f934 AS |
621 | return false; |
622 | return memcmp(s1->server_scope, s2->server_scope, | |
623 | s1->server_scope_sz) == 0; | |
ba84db96 AA |
624 | } |
625 | ||
626 | /** | |
ad0849a7 AA |
627 | * nfs4_detect_session_trunking - Checks for session trunking. |
628 | * | |
629 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
630 | * Upon success, add the transport. | |
ba84db96 AA |
631 | * |
632 | * @clp: original mount nfs_client | |
633 | * @res: result structure from an exchange_id using the original mount | |
634 | * nfs_client with a new multi_addr transport | |
635 | * | |
636 | * Returns zero on success, otherwise -EINVAL | |
637 | * | |
638 | * Note: since the exchange_id for the new multi_addr transport uses the | |
639 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
640 | * so eir_clientowner is the same. | |
641 | */ | |
642 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
643 | struct nfs41_exchange_id_res *res, | |
644 | struct rpc_xprt *xprt) | |
645 | { | |
646 | /* Check eir_clientid */ | |
f251fd9e | 647 | if (clp->cl_clientid != res->clientid) |
ba84db96 AA |
648 | goto out_err; |
649 | ||
650 | /* Check eir_server_owner so_major_id */ | |
651 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
652 | res->server_owner)) | |
653 | goto out_err; | |
654 | ||
655 | /* Check eir_server_owner so_minor_id */ | |
5b6d3ff6 | 656 | if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
ba84db96 AA |
657 | goto out_err; |
658 | ||
659 | /* Check eir_server_scope */ | |
660 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
661 | goto out_err; | |
662 | ||
663 | pr_info("NFS: %s: Session trunking succeeded for %s\n", | |
664 | clp->cl_hostname, | |
665 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
666 | ||
667 | return 0; | |
668 | out_err: | |
669 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
670 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
671 | ||
672 | return -EINVAL; | |
673 | } | |
674 | ||
05f4c350 CL |
675 | /** |
676 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
677 | * | |
678 | * @new: nfs_client with client ID to test | |
679 | * @result: OUT: found nfs_client, or new | |
680 | * @cred: credential to use for trunking test | |
681 | * | |
682 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
683 | * If zero is returned, an nfs_client pointer is planted in "result." | |
684 | * | |
685 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
686 | * the last nfs_client on the list. | |
687 | */ | |
688 | int nfs41_walk_client_list(struct nfs_client *new, | |
689 | struct nfs_client **result, | |
690 | struct rpc_cred *cred) | |
691 | { | |
692 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 693 | struct nfs_client *pos, *prev = NULL; |
202c312d | 694 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
695 | |
696 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 697 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 698 | |
48d66b97 TM |
699 | if (pos == new) |
700 | goto found; | |
701 | ||
14d1bbb0 AS |
702 | status = nfs4_match_client(pos, new, &prev, nn); |
703 | if (status < 0) | |
704 | goto out; | |
705 | if (status != 0) | |
05f4c350 CL |
706 | continue; |
707 | ||
1fc0703a TM |
708 | /* |
709 | * Note that session trunking is just a special subcase of | |
710 | * client id trunking. In either case, we want to fall back | |
711 | * to using the existing nfs_client. | |
712 | */ | |
e7b7cbf6 AA |
713 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
714 | new->cl_serverowner)) | |
05f4c350 CL |
715 | continue; |
716 | ||
48d66b97 | 717 | found: |
4ae19c2d | 718 | atomic_inc(&pos->cl_count); |
7b1f1fd1 | 719 | *result = pos; |
eb04e0ac | 720 | status = 0; |
7b1f1fd1 | 721 | break; |
05f4c350 CL |
722 | } |
723 | ||
14d1bbb0 | 724 | out: |
05f4c350 | 725 | spin_unlock(&nn->nfs_client_lock); |
fe0bf118 | 726 | nfs_put_client(prev); |
202c312d | 727 | return status; |
05f4c350 CL |
728 | } |
729 | #endif /* CONFIG_NFS_V4_1 */ | |
730 | ||
fcf10398 BS |
731 | static void nfs4_destroy_server(struct nfs_server *server) |
732 | { | |
733 | nfs_server_return_all_delegations(server); | |
734 | unset_pnfs_layoutdriver(server); | |
735 | nfs4_purge_state_owners(server); | |
736 | } | |
737 | ||
738 | /* | |
739 | * NFSv4.0 callback thread helper | |
740 | * | |
741 | * Find a client by callback identifier | |
742 | */ | |
743 | struct nfs_client * | |
744 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
745 | { | |
746 | struct nfs_client *clp; | |
747 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
748 | ||
749 | spin_lock(&nn->nfs_client_lock); | |
750 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
751 | if (clp) | |
752 | atomic_inc(&clp->cl_count); | |
753 | spin_unlock(&nn->nfs_client_lock); | |
754 | return clp; | |
755 | } | |
756 | ||
757 | #if defined(CONFIG_NFS_V4_1) | |
758 | /* Common match routine for v4.0 and v4.1 callback services */ | |
759 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
760 | struct nfs_client *clp, u32 minorversion) | |
761 | { | |
762 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
763 | ||
764 | /* Don't match clients that failed to initialise */ | |
765 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
766 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
767 | return false; | |
768 | ||
769 | smp_rmb(); | |
770 | ||
771 | /* Match the version and minorversion */ | |
772 | if (clp->rpc_ops->version != 4 || | |
773 | clp->cl_minorversion != minorversion) | |
774 | return false; | |
775 | ||
776 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 777 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
778 | } |
779 | ||
780 | /* | |
781 | * NFSv4.1 callback thread helper | |
782 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
783 | * minorversion, and sessionID | |
784 | * | |
785 | * Returns NULL if no such client | |
786 | */ | |
787 | struct nfs_client * | |
788 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 789 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
790 | { |
791 | struct nfs_client *clp; | |
792 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
793 | ||
794 | spin_lock(&nn->nfs_client_lock); | |
795 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
459de2ed | 796 | if (nfs4_cb_match_client(addr, clp, minorversion) == false) |
fcf10398 BS |
797 | continue; |
798 | ||
799 | if (!nfs4_has_session(clp)) | |
800 | continue; | |
801 | ||
802 | /* Match sessionid*/ | |
803 | if (memcmp(clp->cl_session->sess_id.data, | |
804 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
805 | continue; | |
806 | ||
807 | atomic_inc(&clp->cl_count); | |
808 | spin_unlock(&nn->nfs_client_lock); | |
809 | return clp; | |
810 | } | |
811 | spin_unlock(&nn->nfs_client_lock); | |
812 | return NULL; | |
813 | } | |
814 | ||
815 | #else /* CONFIG_NFS_V4_1 */ | |
816 | ||
817 | struct nfs_client * | |
818 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 819 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
820 | { |
821 | return NULL; | |
822 | } | |
823 | #endif /* CONFIG_NFS_V4_1 */ | |
824 | ||
825 | /* | |
826 | * Set up an NFS4 client | |
827 | */ | |
828 | static int nfs4_set_client(struct nfs_server *server, | |
829 | const char *hostname, | |
830 | const struct sockaddr *addr, | |
831 | const size_t addrlen, | |
832 | const char *ip_addr, | |
fcf10398 BS |
833 | int proto, const struct rpc_timeout *timeparms, |
834 | u32 minorversion, struct net *net) | |
835 | { | |
836 | struct nfs_client_initdata cl_init = { | |
837 | .hostname = hostname, | |
838 | .addr = addr, | |
839 | .addrlen = addrlen, | |
5c6e5b60 | 840 | .ip_addr = ip_addr, |
ab7017a3 | 841 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
842 | .proto = proto, |
843 | .minorversion = minorversion, | |
844 | .net = net, | |
5c6e5b60 | 845 | .timeparms = timeparms, |
fcf10398 BS |
846 | }; |
847 | struct nfs_client *clp; | |
fcf10398 BS |
848 | |
849 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
850 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
851 | if (server->options & NFS_OPTION_MIGRATION) |
852 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
8dcbec6d CL |
853 | if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
854 | set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); | |
fcf10398 BS |
855 | |
856 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 857 | clp = nfs_get_client(&cl_init); |
2dc42c0d AS |
858 | if (IS_ERR(clp)) |
859 | return PTR_ERR(clp); | |
fcf10398 | 860 | |
2dc42c0d AS |
861 | if (server->nfs_client == clp) |
862 | return -ELOOP; | |
52442f9b | 863 | |
fcf10398 BS |
864 | /* |
865 | * Query for the lease time on clientid setup or renewal | |
866 | * | |
867 | * Note that this will be set on nfs_clients that were created | |
868 | * only for the DS role and did not set this bit, but now will | |
869 | * serve a dual role. | |
870 | */ | |
871 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
872 | ||
873 | server->nfs_client = clp; | |
fcf10398 | 874 | return 0; |
fcf10398 BS |
875 | } |
876 | ||
877 | /* | |
878 | * Set up a pNFS Data Server client. | |
879 | * | |
880 | * Return any existing nfs_client that matches server address,port,version | |
881 | * and minorversion. | |
882 | * | |
883 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
884 | * low timeout interval so that if a connection is lost, we retry through | |
885 | * the MDS. | |
886 | */ | |
3fc75f12 | 887 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
fcf10398 | 888 | const struct sockaddr *ds_addr, int ds_addrlen, |
064172f3 | 889 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 890 | u32 minor_version) |
fcf10398 | 891 | { |
5c6e5b60 | 892 | struct rpc_timeout ds_timeout; |
3fc75f12 | 893 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
894 | struct nfs_client_initdata cl_init = { |
895 | .addr = ds_addr, | |
896 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
897 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
898 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 899 | .nfs_mod = &nfs_v4, |
fcf10398 | 900 | .proto = ds_proto, |
30626f9c | 901 | .minorversion = minor_version, |
fcf10398 | 902 | .net = mds_clp->cl_net, |
5c6e5b60 | 903 | .timeparms = &ds_timeout, |
fcf10398 | 904 | }; |
a363e32e PT |
905 | char buf[INET6_ADDRSTRLEN + 1]; |
906 | ||
907 | if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0) | |
908 | return ERR_PTR(-EINVAL); | |
909 | cl_init.hostname = buf; | |
fcf10398 | 910 | |
3fc75f12 TM |
911 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
912 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
913 | ||
fcf10398 BS |
914 | /* |
915 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
916 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
917 | * (section 13.1 RFC 5661). | |
918 | */ | |
919 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
4fe6b366 | 920 | return nfs_get_client(&cl_init); |
fcf10398 BS |
921 | } |
922 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
923 | ||
924 | /* | |
925 | * Session has been established, and the client marked ready. | |
926 | * Set the mount rsize and wsize with negotiated fore channel | |
927 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
928 | */ | |
929 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
930 | { | |
931 | #ifdef CONFIG_NFS_V4_1 | |
932 | struct nfs4_session *sess; | |
933 | u32 server_resp_sz; | |
934 | u32 server_rqst_sz; | |
935 | ||
936 | if (!nfs4_has_session(server->nfs_client)) | |
937 | return; | |
938 | sess = server->nfs_client->cl_session; | |
939 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
940 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
941 | ||
03385332 | 942 | if (!server->rsize || server->rsize > server_resp_sz) |
fcf10398 | 943 | server->rsize = server_resp_sz; |
03385332 | 944 | if (!server->wsize || server->wsize > server_rqst_sz) |
fcf10398 BS |
945 | server->wsize = server_rqst_sz; |
946 | #endif /* CONFIG_NFS_V4_1 */ | |
947 | } | |
948 | ||
949 | static int nfs4_server_common_setup(struct nfs_server *server, | |
5e6b1990 | 950 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 BS |
951 | { |
952 | struct nfs_fattr *fattr; | |
953 | int error; | |
954 | ||
fcf10398 BS |
955 | /* data servers support only a subset of NFSv4.1 */ |
956 | if (is_ds_only_client(server->nfs_client)) | |
957 | return -EPROTONOSUPPORT; | |
958 | ||
959 | fattr = nfs_alloc_fattr(); | |
960 | if (fattr == NULL) | |
961 | return -ENOMEM; | |
962 | ||
963 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 964 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
965 | if (error < 0) |
966 | goto out; | |
967 | ||
39c6daae TM |
968 | /* Set the basic capabilities */ |
969 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
970 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
971 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
972 | /* | |
973 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
974 | * authentication. | |
975 | */ | |
976 | if (nfs4_disable_idmapping && | |
977 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
978 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
979 | ||
980 | ||
fcf10398 | 981 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 982 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
983 | if (error < 0) |
984 | goto out; | |
985 | ||
986 | dprintk("Server FSID: %llx:%llx\n", | |
987 | (unsigned long long) server->fsid.major, | |
988 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 989 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 BS |
990 | |
991 | nfs4_session_set_rwsize(server); | |
992 | ||
993 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
994 | if (error < 0) | |
995 | goto out; | |
996 | ||
997 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
998 | server->namelen = NFS4_MAXNAMLEN; | |
999 | ||
1000 | nfs_server_insert_lists(server); | |
1001 | server->mount_time = jiffies; | |
1002 | server->destroy = nfs4_destroy_server; | |
1003 | out: | |
1004 | nfs_free_fattr(fattr); | |
1005 | return error; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Create a version 4 volume record | |
1010 | */ | |
1011 | static int nfs4_init_server(struct nfs_server *server, | |
a3f73c27 | 1012 | struct nfs_parsed_mount_data *data) |
fcf10398 BS |
1013 | { |
1014 | struct rpc_timeout timeparms; | |
1015 | int error; | |
1016 | ||
fcf10398 BS |
1017 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1018 | data->timeo, data->retrans); | |
1019 | ||
1020 | /* Initialise the client representation from the mount data */ | |
1021 | server->flags = data->flags; | |
fcf10398 | 1022 | server->options = data->options; |
0f5f49b8 | 1023 | server->auth_info = data->auth_info; |
fcf10398 | 1024 | |
4d4b69dd WAA |
1025 | /* Use the first specified auth flavor. If this flavor isn't |
1026 | * allowed by the server, use the SECINFO path to try the | |
1027 | * other specified flavors */ | |
a3f73c27 WAA |
1028 | if (data->auth_info.flavor_len >= 1) |
1029 | data->selected_flavor = data->auth_info.flavors[0]; | |
1030 | else | |
1031 | data->selected_flavor = RPC_AUTH_UNIX; | |
5e6b1990 | 1032 | |
fcf10398 BS |
1033 | /* Get a client record */ |
1034 | error = nfs4_set_client(server, | |
1035 | data->nfs_server.hostname, | |
1036 | (const struct sockaddr *)&data->nfs_server.address, | |
1037 | data->nfs_server.addrlen, | |
1038 | data->client_address, | |
fcf10398 BS |
1039 | data->nfs_server.protocol, |
1040 | &timeparms, | |
1041 | data->minorversion, | |
1042 | data->net); | |
1043 | if (error < 0) | |
1073d9b4 | 1044 | return error; |
fcf10398 | 1045 | |
fcf10398 BS |
1046 | if (data->rsize) |
1047 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1048 | if (data->wsize) | |
1049 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1050 | ||
1051 | server->acregmin = data->acregmin * HZ; | |
1052 | server->acregmax = data->acregmax * HZ; | |
1053 | server->acdirmin = data->acdirmin * HZ; | |
1054 | server->acdirmax = data->acdirmax * HZ; | |
1073d9b4 | 1055 | server->port = data->nfs_server.port; |
fcf10398 | 1056 | |
1073d9b4 AS |
1057 | return nfs_init_server_rpcclient(server, &timeparms, |
1058 | data->selected_flavor); | |
fcf10398 BS |
1059 | } |
1060 | ||
1061 | /* | |
1062 | * Create a version 4 volume record | |
1063 | * - keyed on server and FSID | |
1064 | */ | |
1179acc6 BS |
1065 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
1066 | struct nfs_fh *mntfh)*/ | |
1067 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
1068 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
1069 | { |
1070 | struct nfs_server *server; | |
5e6b1990 | 1071 | bool auth_probe; |
fcf10398 BS |
1072 | int error; |
1073 | ||
fcf10398 BS |
1074 | server = nfs_alloc_server(); |
1075 | if (!server) | |
1076 | return ERR_PTR(-ENOMEM); | |
1077 | ||
a3f73c27 | 1078 | auth_probe = mount_info->parsed->auth_info.flavor_len < 1; |
5e6b1990 | 1079 | |
fcf10398 | 1080 | /* set up the general RPC client */ |
1179acc6 | 1081 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
1082 | if (error < 0) |
1083 | goto error; | |
1084 | ||
5e6b1990 | 1085 | error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); |
fcf10398 BS |
1086 | if (error < 0) |
1087 | goto error; | |
1088 | ||
fcf10398 BS |
1089 | return server; |
1090 | ||
1091 | error: | |
1092 | nfs_free_server(server); | |
fcf10398 BS |
1093 | return ERR_PTR(error); |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Create an NFS4 referral server record | |
1098 | */ | |
1099 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1100 | struct nfs_fh *mntfh) | |
1101 | { | |
1102 | struct nfs_client *parent_client; | |
1103 | struct nfs_server *server, *parent_server; | |
5837f6df | 1104 | bool auth_probe; |
fcf10398 BS |
1105 | int error; |
1106 | ||
fcf10398 BS |
1107 | server = nfs_alloc_server(); |
1108 | if (!server) | |
1109 | return ERR_PTR(-ENOMEM); | |
1110 | ||
1111 | parent_server = NFS_SB(data->sb); | |
1112 | parent_client = parent_server->nfs_client; | |
1113 | ||
1114 | /* Initialise the client representation from the parent server */ | |
1115 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 BS |
1116 | |
1117 | /* Get a client representation. | |
1118 | * Note: NFSv4 always uses TCP, */ | |
1119 | error = nfs4_set_client(server, data->hostname, | |
1120 | data->addr, | |
1121 | data->addrlen, | |
1122 | parent_client->cl_ipaddr, | |
fcf10398 BS |
1123 | rpc_protocol(parent_server->client), |
1124 | parent_server->client->cl_timeout, | |
1125 | parent_client->cl_mvops->minor_version, | |
1126 | parent_client->cl_net); | |
1127 | if (error < 0) | |
1128 | goto error; | |
1129 | ||
1130 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
1131 | if (error < 0) | |
1132 | goto error; | |
1133 | ||
5837f6df WAA |
1134 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1135 | ||
1136 | error = nfs4_server_common_setup(server, mntfh, auth_probe); | |
fcf10398 BS |
1137 | if (error < 0) |
1138 | goto error; | |
1139 | ||
fcf10398 BS |
1140 | return server; |
1141 | ||
1142 | error: | |
1143 | nfs_free_server(server); | |
fcf10398 BS |
1144 | return ERR_PTR(error); |
1145 | } | |
32e62b7c CL |
1146 | |
1147 | /* | |
1148 | * Grab the destination's particulars, including lease expiry time. | |
1149 | * | |
1150 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
1151 | * we have cached. | |
1152 | */ | |
1153 | static int nfs_probe_destination(struct nfs_server *server) | |
1154 | { | |
2b0143b5 | 1155 | struct inode *inode = d_inode(server->super->s_root); |
32e62b7c CL |
1156 | struct nfs_fattr *fattr; |
1157 | int error; | |
1158 | ||
1159 | fattr = nfs_alloc_fattr(); | |
1160 | if (fattr == NULL) | |
1161 | return -ENOMEM; | |
1162 | ||
1163 | /* Sanity: the probe won't work if the destination server | |
1164 | * does not recognize the migrated FH. */ | |
1165 | error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); | |
1166 | ||
1167 | nfs_free_fattr(fattr); | |
1168 | return error; | |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1173 | * | |
1174 | * @server: represents FSID to be moved | |
1175 | * @hostname: new end-point's hostname | |
1176 | * @sap: new end-point's socket address | |
1177 | * @salen: size of "sap" | |
292f503c | 1178 | * @net: net namespace |
32e62b7c CL |
1179 | * |
1180 | * The nfs_server must be quiescent before this function is invoked. | |
1181 | * Either its session is drained (NFSv4.1+), or its transport is | |
1182 | * plugged and drained (NFSv4.0). | |
1183 | * | |
1184 | * Returns zero on success, or a negative errno value. | |
1185 | */ | |
1186 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
292f503c | 1187 | struct sockaddr *sap, size_t salen, struct net *net) |
32e62b7c CL |
1188 | { |
1189 | struct nfs_client *clp = server->nfs_client; | |
1190 | struct rpc_clnt *clnt = server->client; | |
1191 | struct xprt_create xargs = { | |
1192 | .ident = clp->cl_proto, | |
292f503c | 1193 | .net = net, |
32e62b7c CL |
1194 | .dstaddr = sap, |
1195 | .addrlen = salen, | |
1196 | .servername = hostname, | |
1197 | }; | |
1198 | char buf[INET6_ADDRSTRLEN + 1]; | |
1199 | struct sockaddr_storage address; | |
1200 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1201 | int error; | |
1202 | ||
32e62b7c | 1203 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
4fe6b366 AS |
1204 | if (error != 0) |
1205 | return error; | |
32e62b7c CL |
1206 | |
1207 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
4fe6b366 AS |
1208 | if (error != 0) |
1209 | return error; | |
32e62b7c | 1210 | |
4fe6b366 AS |
1211 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
1212 | return -EAFNOSUPPORT; | |
32e62b7c CL |
1213 | |
1214 | nfs_server_remove_lists(server); | |
8dcbec6d | 1215 | set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c | 1216 | error = nfs4_set_client(server, hostname, sap, salen, buf, |
32e62b7c | 1217 | clp->cl_proto, clnt->cl_timeout, |
292f503c | 1218 | clp->cl_minorversion, net); |
8dcbec6d | 1219 | clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c CL |
1220 | nfs_put_client(clp); |
1221 | if (error != 0) { | |
1222 | nfs_server_insert_lists(server); | |
4fe6b366 | 1223 | return error; |
32e62b7c CL |
1224 | } |
1225 | ||
1226 | if (server->nfs_client->cl_hostname == NULL) | |
1227 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
1228 | nfs_server_insert_lists(server); | |
1229 | ||
4fe6b366 | 1230 | return nfs_probe_destination(server); |
32e62b7c | 1231 | } |