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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 | ||
362 | if (clp->cl_cons_state == NFS_CS_READY) { | |
363 | /* the client is initialised already */ | |
364 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
365 | return clp; | |
366 | } | |
367 | ||
368 | /* Check NFS protocol revision and initialize RPC op vector */ | |
369 | clp->rpc_ops = &nfs_v4_clientops; | |
370 | ||
98f98cf5 TM |
371 | if (clp->cl_minorversion != 0) |
372 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 373 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
99875249 | 374 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
6aa23d76 | 375 | |
5c6e5b60 | 376 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); |
23631227 | 377 | if (error == -EINVAL) |
5c6e5b60 | 378 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
428360d7 BS |
379 | if (error < 0) |
380 | goto error; | |
381 | ||
382 | /* If no clientaddr= option was specified, find a usable cb address */ | |
383 | if (ip_addr == NULL) { | |
384 | struct sockaddr_storage cb_addr; | |
385 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
386 | ||
387 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
388 | if (error < 0) | |
389 | goto error; | |
390 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
391 | if (error < 0) | |
392 | goto error; | |
393 | ip_addr = (const char *)buf; | |
394 | } | |
395 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
396 | ||
397 | error = nfs_idmap_new(clp); | |
398 | if (error < 0) { | |
399 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
400 | __func__, error); | |
401 | goto error; | |
402 | } | |
403 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
404 | ||
405 | error = nfs4_init_client_minor_version(clp); | |
406 | if (error < 0) | |
407 | goto error; | |
408 | ||
409 | if (!nfs4_has_session(clp)) | |
410 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
05f4c350 CL |
411 | |
412 | error = nfs4_discover_server_trunking(clp, &old); | |
413 | if (error < 0) | |
414 | goto error; | |
05f4c350 | 415 | |
abad2fa5 WAA |
416 | if (clp != old) |
417 | clp->cl_preserve_clid = true; | |
418 | nfs_put_client(clp); | |
419 | return old; | |
428360d7 BS |
420 | |
421 | error: | |
422 | nfs_mark_client_ready(clp, error); | |
423 | nfs_put_client(clp); | |
424 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
425 | return ERR_PTR(error); | |
426 | } | |
fcf10398 | 427 | |
05f4c350 CL |
428 | /* |
429 | * SETCLIENTID just did a callback update with the callback ident in | |
430 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
431 | * actually the same server. Swap the callback IDs so that "keep" | |
432 | * will continue to use the callback ident the server now knows about, | |
433 | * and so that "keep"'s original callback ident is destroyed when | |
434 | * "drop" is freed. | |
435 | */ | |
436 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
437 | struct nfs_client *drop) | |
438 | { | |
439 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
440 | unsigned int save = keep->cl_cb_ident; | |
441 | ||
442 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
443 | return; | |
444 | ||
445 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
446 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
447 | ||
448 | spin_lock(&nn->nfs_client_lock); | |
449 | ||
450 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
451 | keep->cl_cb_ident = drop->cl_cb_ident; | |
452 | ||
453 | idr_replace(&nn->cb_ident_idr, drop, save); | |
454 | drop->cl_cb_ident = save; | |
455 | ||
456 | spin_unlock(&nn->nfs_client_lock); | |
457 | } | |
458 | ||
55b9df93 TM |
459 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
460 | const struct nfs_client *clp2) | |
461 | { | |
462 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
463 | return true; | |
464 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
465 | } | |
466 | ||
ced85a75 BF |
467 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
468 | { | |
469 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
470 | } | |
471 | ||
05f4c350 CL |
472 | /** |
473 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
474 | * | |
475 | * @new: nfs_client with client ID to test | |
476 | * @result: OUT: found nfs_client, or new | |
477 | * @cred: credential to use for trunking test | |
478 | * | |
479 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
480 | * If zero is returned, an nfs_client pointer is planted in "result." | |
481 | * | |
482 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
483 | * the last nfs_client on the list. | |
484 | */ | |
485 | int nfs40_walk_client_list(struct nfs_client *new, | |
486 | struct nfs_client **result, | |
487 | struct rpc_cred *cred) | |
488 | { | |
489 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 490 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
491 | struct nfs4_setclientid_res clid = { |
492 | .clientid = new->cl_clientid, | |
493 | .confirm = new->cl_confirm, | |
494 | }; | |
4ae19c2d | 495 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
496 | |
497 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 498 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c SD |
499 | |
500 | if (pos->rpc_ops != new->rpc_ops) | |
501 | continue; | |
502 | ||
080af20c SD |
503 | if (pos->cl_minorversion != new->cl_minorversion) |
504 | continue; | |
505 | ||
05f4c350 CL |
506 | /* If "pos" isn't marked ready, we can't trust the |
507 | * remaining fields in "pos" */ | |
7b1f1fd1 TM |
508 | if (pos->cl_cons_state > NFS_CS_READY) { |
509 | atomic_inc(&pos->cl_count); | |
510 | spin_unlock(&nn->nfs_client_lock); | |
511 | ||
fe0bf118 | 512 | nfs_put_client(prev); |
7b1f1fd1 TM |
513 | prev = pos; |
514 | ||
515 | status = nfs_wait_client_init_complete(pos); | |
7b1f1fd1 | 516 | if (status < 0) |
64590daa TM |
517 | goto out; |
518 | status = -NFS4ERR_STALE_CLIENTID; | |
519 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 TM |
520 | } |
521 | if (pos->cl_cons_state != NFS_CS_READY) | |
05f4c350 CL |
522 | continue; |
523 | ||
05f4c350 CL |
524 | if (pos->cl_clientid != new->cl_clientid) |
525 | continue; | |
526 | ||
55b9df93 TM |
527 | if (!nfs4_match_client_owner_id(pos, new)) |
528 | continue; | |
ced85a75 BF |
529 | /* |
530 | * We just sent a new SETCLIENTID, which should have | |
531 | * caused the server to return a new cl_confirm. So if | |
532 | * cl_confirm is the same, then this is a different | |
533 | * server that just returned the same cl_confirm by | |
534 | * coincidence: | |
535 | */ | |
536 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
537 | &new->cl_confirm)) | |
538 | continue; | |
539 | /* | |
540 | * But if the cl_confirm's are different, then the only | |
541 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
542 | * if new and pos point to the same server: | |
543 | */ | |
05f4c350 CL |
544 | atomic_inc(&pos->cl_count); |
545 | spin_unlock(&nn->nfs_client_lock); | |
546 | ||
fe0bf118 | 547 | nfs_put_client(prev); |
4ae19c2d | 548 | prev = pos; |
05f4c350 CL |
549 | |
550 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
551 | switch (status) { |
552 | case -NFS4ERR_STALE_CLIENTID: | |
553 | break; | |
554 | case 0: | |
05f4c350 | 555 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 556 | pos->cl_confirm = new->cl_confirm; |
05f4c350 | 557 | |
4ae19c2d | 558 | prev = NULL; |
05f4c350 CL |
559 | *result = pos; |
560 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", | |
561 | __func__, pos, atomic_read(&pos->cl_count)); | |
f9b7ebdf TM |
562 | goto out; |
563 | case -ERESTARTSYS: | |
564 | case -ETIMEDOUT: | |
565 | /* The callback path may have been inadvertently | |
566 | * changed. Schedule recovery! | |
567 | */ | |
568 | nfs4_schedule_path_down_recovery(pos); | |
4ae19c2d TM |
569 | default: |
570 | goto out; | |
05f4c350 CL |
571 | } |
572 | ||
573 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 574 | } |
4ae19c2d | 575 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 576 | |
202c312d | 577 | /* No match found. The server lost our clientid */ |
4ae19c2d | 578 | out: |
fe0bf118 | 579 | nfs_put_client(prev); |
4ae19c2d TM |
580 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
581 | return status; | |
05f4c350 CL |
582 | } |
583 | ||
584 | #ifdef CONFIG_NFS_V4_1 | |
f9d640f3 TM |
585 | /* |
586 | * Returns true if the client IDs match | |
587 | */ | |
8e548edb | 588 | static bool nfs4_match_clientids(u64 a, u64 b) |
f9d640f3 | 589 | { |
8e548edb | 590 | if (a != b) { |
f9d640f3 | 591 | dprintk("NFS: --> %s client ID %llx does not match %llx\n", |
8e548edb | 592 | __func__, a, b); |
f9d640f3 TM |
593 | return false; |
594 | } | |
595 | dprintk("NFS: --> %s client ID %llx matches %llx\n", | |
8e548edb | 596 | __func__, a, b); |
f9d640f3 TM |
597 | return true; |
598 | } | |
599 | ||
05f4c350 | 600 | /* |
1fc0703a | 601 | * Returns true if the server major ids match |
05f4c350 CL |
602 | */ |
603 | static bool | |
e7b7cbf6 AA |
604 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
605 | struct nfs41_server_owner *o2) | |
05f4c350 | 606 | { |
05f4c350 CL |
607 | if (o1->major_id_sz != o2->major_id_sz) |
608 | goto out_major_mismatch; | |
609 | if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0) | |
610 | goto out_major_mismatch; | |
611 | ||
e7b7cbf6 | 612 | dprintk("NFS: --> %s server owner major IDs match\n", __func__); |
05f4c350 CL |
613 | return true; |
614 | ||
615 | out_major_mismatch: | |
616 | dprintk("NFS: --> %s server owner major IDs do not match\n", | |
617 | __func__); | |
618 | return false; | |
619 | } | |
620 | ||
ba84db96 AA |
621 | /* |
622 | * Returns true if server minor ids match | |
623 | */ | |
624 | static bool | |
625 | nfs4_check_serverowner_minor_id(struct nfs41_server_owner *o1, | |
626 | struct nfs41_server_owner *o2) | |
627 | { | |
628 | /* Check eir_server_owner so_minor_id */ | |
629 | if (o1->minor_id != o2->minor_id) | |
630 | goto out_minor_mismatch; | |
631 | ||
632 | dprintk("NFS: --> %s server owner minor IDs match\n", __func__); | |
633 | return true; | |
634 | ||
635 | out_minor_mismatch: | |
636 | dprintk("NFS: --> %s server owner minor IDs do not match\n", __func__); | |
637 | return false; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Returns true if the server scopes match | |
642 | */ | |
643 | static bool | |
644 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
645 | struct nfs41_server_scope *s2) | |
646 | { | |
647 | if (s1->server_scope_sz != s2->server_scope_sz) | |
648 | goto out_scope_mismatch; | |
649 | if (memcmp(s1->server_scope, s2->server_scope, | |
650 | s1->server_scope_sz) != 0) | |
651 | goto out_scope_mismatch; | |
652 | ||
653 | dprintk("NFS: --> %s server scopes match\n", __func__); | |
654 | return true; | |
655 | ||
656 | out_scope_mismatch: | |
657 | dprintk("NFS: --> %s server scopes do not match\n", | |
658 | __func__); | |
659 | return false; | |
660 | } | |
661 | ||
662 | /** | |
ad0849a7 AA |
663 | * nfs4_detect_session_trunking - Checks for session trunking. |
664 | * | |
665 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
666 | * Upon success, add the transport. | |
ba84db96 AA |
667 | * |
668 | * @clp: original mount nfs_client | |
669 | * @res: result structure from an exchange_id using the original mount | |
670 | * nfs_client with a new multi_addr transport | |
671 | * | |
672 | * Returns zero on success, otherwise -EINVAL | |
673 | * | |
674 | * Note: since the exchange_id for the new multi_addr transport uses the | |
675 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
676 | * so eir_clientowner is the same. | |
677 | */ | |
678 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
679 | struct nfs41_exchange_id_res *res, | |
680 | struct rpc_xprt *xprt) | |
681 | { | |
682 | /* Check eir_clientid */ | |
683 | if (!nfs4_match_clientids(clp->cl_clientid, res->clientid)) | |
684 | goto out_err; | |
685 | ||
686 | /* Check eir_server_owner so_major_id */ | |
687 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
688 | res->server_owner)) | |
689 | goto out_err; | |
690 | ||
691 | /* Check eir_server_owner so_minor_id */ | |
692 | if (!nfs4_check_serverowner_minor_id(clp->cl_serverowner, | |
693 | res->server_owner)) | |
694 | goto out_err; | |
695 | ||
696 | /* Check eir_server_scope */ | |
697 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
698 | goto out_err; | |
699 | ||
ad0849a7 AA |
700 | /* Session trunking passed, add the xprt */ |
701 | rpc_clnt_xprt_switch_add_xprt(clp->cl_rpcclient, xprt); | |
702 | ||
ba84db96 AA |
703 | pr_info("NFS: %s: Session trunking succeeded for %s\n", |
704 | clp->cl_hostname, | |
705 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
706 | ||
707 | return 0; | |
708 | out_err: | |
709 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
710 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
711 | ||
712 | return -EINVAL; | |
713 | } | |
714 | ||
05f4c350 CL |
715 | /** |
716 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
717 | * | |
718 | * @new: nfs_client with client ID to test | |
719 | * @result: OUT: found nfs_client, or new | |
720 | * @cred: credential to use for trunking test | |
721 | * | |
722 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
723 | * If zero is returned, an nfs_client pointer is planted in "result." | |
724 | * | |
725 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
726 | * the last nfs_client on the list. | |
727 | */ | |
728 | int nfs41_walk_client_list(struct nfs_client *new, | |
729 | struct nfs_client **result, | |
730 | struct rpc_cred *cred) | |
731 | { | |
732 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 733 | struct nfs_client *pos, *prev = NULL; |
202c312d | 734 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
735 | |
736 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 737 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 738 | |
48d66b97 TM |
739 | if (pos == new) |
740 | goto found; | |
741 | ||
080af20c SD |
742 | if (pos->rpc_ops != new->rpc_ops) |
743 | continue; | |
744 | ||
080af20c SD |
745 | if (pos->cl_minorversion != new->cl_minorversion) |
746 | continue; | |
747 | ||
05f4c350 CL |
748 | /* If "pos" isn't marked ready, we can't trust the |
749 | * remaining fields in "pos", especially the client | |
750 | * ID and serverowner fields. Wait for CREATE_SESSION | |
751 | * to finish. */ | |
7b1f1fd1 | 752 | if (pos->cl_cons_state > NFS_CS_READY) { |
05f4c350 CL |
753 | atomic_inc(&pos->cl_count); |
754 | spin_unlock(&nn->nfs_client_lock); | |
755 | ||
fe0bf118 | 756 | nfs_put_client(prev); |
05f4c350 CL |
757 | prev = pos; |
758 | ||
202c312d | 759 | status = nfs_wait_client_init_complete(pos); |
05f4c350 | 760 | spin_lock(&nn->nfs_client_lock); |
65436ec0 | 761 | if (status < 0) |
64590daa TM |
762 | break; |
763 | status = -NFS4ERR_STALE_CLIENTID; | |
05f4c350 | 764 | } |
7b1f1fd1 TM |
765 | if (pos->cl_cons_state != NFS_CS_READY) |
766 | continue; | |
05f4c350 | 767 | |
8e548edb | 768 | if (!nfs4_match_clientids(pos->cl_clientid, new->cl_clientid)) |
05f4c350 CL |
769 | continue; |
770 | ||
1fc0703a TM |
771 | /* |
772 | * Note that session trunking is just a special subcase of | |
773 | * client id trunking. In either case, we want to fall back | |
774 | * to using the existing nfs_client. | |
775 | */ | |
e7b7cbf6 AA |
776 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
777 | new->cl_serverowner)) | |
05f4c350 CL |
778 | continue; |
779 | ||
55b9df93 TM |
780 | /* Unlike NFSv4.0, we know that NFSv4.1 always uses the |
781 | * uniform string, however someone might switch the | |
782 | * uniquifier string on us. | |
783 | */ | |
784 | if (!nfs4_match_client_owner_id(pos, new)) | |
785 | continue; | |
48d66b97 | 786 | found: |
4ae19c2d | 787 | atomic_inc(&pos->cl_count); |
7b1f1fd1 | 788 | *result = pos; |
eb04e0ac | 789 | status = 0; |
05f4c350 CL |
790 | dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", |
791 | __func__, pos, atomic_read(&pos->cl_count)); | |
7b1f1fd1 | 792 | break; |
05f4c350 CL |
793 | } |
794 | ||
05f4c350 | 795 | spin_unlock(&nn->nfs_client_lock); |
202c312d | 796 | dprintk("NFS: <-- %s status = %d\n", __func__, status); |
fe0bf118 | 797 | nfs_put_client(prev); |
202c312d | 798 | return status; |
05f4c350 CL |
799 | } |
800 | #endif /* CONFIG_NFS_V4_1 */ | |
801 | ||
fcf10398 BS |
802 | static void nfs4_destroy_server(struct nfs_server *server) |
803 | { | |
804 | nfs_server_return_all_delegations(server); | |
805 | unset_pnfs_layoutdriver(server); | |
806 | nfs4_purge_state_owners(server); | |
807 | } | |
808 | ||
809 | /* | |
810 | * NFSv4.0 callback thread helper | |
811 | * | |
812 | * Find a client by callback identifier | |
813 | */ | |
814 | struct nfs_client * | |
815 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
816 | { | |
817 | struct nfs_client *clp; | |
818 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
819 | ||
820 | spin_lock(&nn->nfs_client_lock); | |
821 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
822 | if (clp) | |
823 | atomic_inc(&clp->cl_count); | |
824 | spin_unlock(&nn->nfs_client_lock); | |
825 | return clp; | |
826 | } | |
827 | ||
828 | #if defined(CONFIG_NFS_V4_1) | |
829 | /* Common match routine for v4.0 and v4.1 callback services */ | |
830 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
831 | struct nfs_client *clp, u32 minorversion) | |
832 | { | |
833 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
834 | ||
835 | /* Don't match clients that failed to initialise */ | |
836 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
837 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
838 | return false; | |
839 | ||
840 | smp_rmb(); | |
841 | ||
842 | /* Match the version and minorversion */ | |
843 | if (clp->rpc_ops->version != 4 || | |
844 | clp->cl_minorversion != minorversion) | |
845 | return false; | |
846 | ||
847 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 848 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
849 | } |
850 | ||
851 | /* | |
852 | * NFSv4.1 callback thread helper | |
853 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
854 | * minorversion, and sessionID | |
855 | * | |
856 | * Returns NULL if no such client | |
857 | */ | |
858 | struct nfs_client * | |
859 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 860 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
861 | { |
862 | struct nfs_client *clp; | |
863 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
864 | ||
865 | spin_lock(&nn->nfs_client_lock); | |
866 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
459de2ed | 867 | if (nfs4_cb_match_client(addr, clp, minorversion) == false) |
fcf10398 BS |
868 | continue; |
869 | ||
870 | if (!nfs4_has_session(clp)) | |
871 | continue; | |
872 | ||
873 | /* Match sessionid*/ | |
874 | if (memcmp(clp->cl_session->sess_id.data, | |
875 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
876 | continue; | |
877 | ||
878 | atomic_inc(&clp->cl_count); | |
879 | spin_unlock(&nn->nfs_client_lock); | |
880 | return clp; | |
881 | } | |
882 | spin_unlock(&nn->nfs_client_lock); | |
883 | return NULL; | |
884 | } | |
885 | ||
886 | #else /* CONFIG_NFS_V4_1 */ | |
887 | ||
888 | struct nfs_client * | |
889 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 890 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
891 | { |
892 | return NULL; | |
893 | } | |
894 | #endif /* CONFIG_NFS_V4_1 */ | |
895 | ||
896 | /* | |
897 | * Set up an NFS4 client | |
898 | */ | |
899 | static int nfs4_set_client(struct nfs_server *server, | |
900 | const char *hostname, | |
901 | const struct sockaddr *addr, | |
902 | const size_t addrlen, | |
903 | const char *ip_addr, | |
fcf10398 BS |
904 | int proto, const struct rpc_timeout *timeparms, |
905 | u32 minorversion, struct net *net) | |
906 | { | |
907 | struct nfs_client_initdata cl_init = { | |
908 | .hostname = hostname, | |
909 | .addr = addr, | |
910 | .addrlen = addrlen, | |
5c6e5b60 | 911 | .ip_addr = ip_addr, |
ab7017a3 | 912 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
913 | .proto = proto, |
914 | .minorversion = minorversion, | |
915 | .net = net, | |
5c6e5b60 | 916 | .timeparms = timeparms, |
fcf10398 BS |
917 | }; |
918 | struct nfs_client *clp; | |
919 | int error; | |
920 | ||
921 | dprintk("--> nfs4_set_client()\n"); | |
922 | ||
923 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
924 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
925 | if (server->options & NFS_OPTION_MIGRATION) |
926 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
fcf10398 BS |
927 | |
928 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 929 | clp = nfs_get_client(&cl_init); |
fcf10398 BS |
930 | if (IS_ERR(clp)) { |
931 | error = PTR_ERR(clp); | |
932 | goto error; | |
933 | } | |
934 | ||
52442f9b BC |
935 | if (server->nfs_client == clp) { |
936 | error = -ELOOP; | |
937 | goto error; | |
938 | } | |
939 | ||
fcf10398 BS |
940 | /* |
941 | * Query for the lease time on clientid setup or renewal | |
942 | * | |
943 | * Note that this will be set on nfs_clients that were created | |
944 | * only for the DS role and did not set this bit, but now will | |
945 | * serve a dual role. | |
946 | */ | |
947 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
948 | ||
949 | server->nfs_client = clp; | |
950 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
951 | return 0; | |
952 | error: | |
953 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
954 | return error; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Set up a pNFS Data Server client. | |
959 | * | |
960 | * Return any existing nfs_client that matches server address,port,version | |
961 | * and minorversion. | |
962 | * | |
963 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
964 | * low timeout interval so that if a connection is lost, we retry through | |
965 | * the MDS. | |
966 | */ | |
3fc75f12 | 967 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
fcf10398 | 968 | const struct sockaddr *ds_addr, int ds_addrlen, |
064172f3 | 969 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 970 | u32 minor_version) |
fcf10398 | 971 | { |
5c6e5b60 | 972 | struct rpc_timeout ds_timeout; |
3fc75f12 | 973 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
974 | struct nfs_client_initdata cl_init = { |
975 | .addr = ds_addr, | |
976 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
977 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
978 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 979 | .nfs_mod = &nfs_v4, |
fcf10398 | 980 | .proto = ds_proto, |
30626f9c | 981 | .minorversion = minor_version, |
fcf10398 | 982 | .net = mds_clp->cl_net, |
5c6e5b60 | 983 | .timeparms = &ds_timeout, |
fcf10398 | 984 | }; |
fcf10398 | 985 | struct nfs_client *clp; |
a363e32e PT |
986 | char buf[INET6_ADDRSTRLEN + 1]; |
987 | ||
988 | if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0) | |
989 | return ERR_PTR(-EINVAL); | |
990 | cl_init.hostname = buf; | |
fcf10398 | 991 | |
3fc75f12 TM |
992 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
993 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
994 | ||
fcf10398 BS |
995 | /* |
996 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
997 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
998 | * (section 13.1 RFC 5661). | |
999 | */ | |
1000 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
7d38de3f | 1001 | clp = nfs_get_client(&cl_init); |
fcf10398 BS |
1002 | |
1003 | dprintk("<-- %s %p\n", __func__, clp); | |
1004 | return clp; | |
1005 | } | |
1006 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
1007 | ||
1008 | /* | |
1009 | * Session has been established, and the client marked ready. | |
1010 | * Set the mount rsize and wsize with negotiated fore channel | |
1011 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1012 | */ | |
1013 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1014 | { | |
1015 | #ifdef CONFIG_NFS_V4_1 | |
1016 | struct nfs4_session *sess; | |
1017 | u32 server_resp_sz; | |
1018 | u32 server_rqst_sz; | |
1019 | ||
1020 | if (!nfs4_has_session(server->nfs_client)) | |
1021 | return; | |
1022 | sess = server->nfs_client->cl_session; | |
1023 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1024 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1025 | ||
03385332 | 1026 | if (!server->rsize || server->rsize > server_resp_sz) |
fcf10398 | 1027 | server->rsize = server_resp_sz; |
03385332 | 1028 | if (!server->wsize || server->wsize > server_rqst_sz) |
fcf10398 BS |
1029 | server->wsize = server_rqst_sz; |
1030 | #endif /* CONFIG_NFS_V4_1 */ | |
1031 | } | |
1032 | ||
1033 | static int nfs4_server_common_setup(struct nfs_server *server, | |
5e6b1990 | 1034 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 BS |
1035 | { |
1036 | struct nfs_fattr *fattr; | |
1037 | int error; | |
1038 | ||
fcf10398 BS |
1039 | /* data servers support only a subset of NFSv4.1 */ |
1040 | if (is_ds_only_client(server->nfs_client)) | |
1041 | return -EPROTONOSUPPORT; | |
1042 | ||
1043 | fattr = nfs_alloc_fattr(); | |
1044 | if (fattr == NULL) | |
1045 | return -ENOMEM; | |
1046 | ||
1047 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 1048 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
1049 | if (error < 0) |
1050 | goto out; | |
1051 | ||
39c6daae TM |
1052 | /* Set the basic capabilities */ |
1053 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
1054 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
1055 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
1056 | /* | |
1057 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1058 | * authentication. | |
1059 | */ | |
1060 | if (nfs4_disable_idmapping && | |
1061 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
1062 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1063 | ||
1064 | ||
fcf10398 | 1065 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 1066 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
1067 | if (error < 0) |
1068 | goto out; | |
1069 | ||
1070 | dprintk("Server FSID: %llx:%llx\n", | |
1071 | (unsigned long long) server->fsid.major, | |
1072 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 1073 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 BS |
1074 | |
1075 | nfs4_session_set_rwsize(server); | |
1076 | ||
1077 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1078 | if (error < 0) | |
1079 | goto out; | |
1080 | ||
1081 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1082 | server->namelen = NFS4_MAXNAMLEN; | |
1083 | ||
1084 | nfs_server_insert_lists(server); | |
1085 | server->mount_time = jiffies; | |
1086 | server->destroy = nfs4_destroy_server; | |
1087 | out: | |
1088 | nfs_free_fattr(fattr); | |
1089 | return error; | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Create a version 4 volume record | |
1094 | */ | |
1095 | static int nfs4_init_server(struct nfs_server *server, | |
a3f73c27 | 1096 | struct nfs_parsed_mount_data *data) |
fcf10398 BS |
1097 | { |
1098 | struct rpc_timeout timeparms; | |
1099 | int error; | |
1100 | ||
1101 | dprintk("--> nfs4_init_server()\n"); | |
1102 | ||
1103 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
1104 | data->timeo, data->retrans); | |
1105 | ||
1106 | /* Initialise the client representation from the mount data */ | |
1107 | server->flags = data->flags; | |
fcf10398 | 1108 | server->options = data->options; |
0f5f49b8 | 1109 | server->auth_info = data->auth_info; |
fcf10398 | 1110 | |
4d4b69dd WAA |
1111 | /* Use the first specified auth flavor. If this flavor isn't |
1112 | * allowed by the server, use the SECINFO path to try the | |
1113 | * other specified flavors */ | |
a3f73c27 WAA |
1114 | if (data->auth_info.flavor_len >= 1) |
1115 | data->selected_flavor = data->auth_info.flavors[0]; | |
1116 | else | |
1117 | data->selected_flavor = RPC_AUTH_UNIX; | |
5e6b1990 | 1118 | |
fcf10398 BS |
1119 | /* Get a client record */ |
1120 | error = nfs4_set_client(server, | |
1121 | data->nfs_server.hostname, | |
1122 | (const struct sockaddr *)&data->nfs_server.address, | |
1123 | data->nfs_server.addrlen, | |
1124 | data->client_address, | |
fcf10398 BS |
1125 | data->nfs_server.protocol, |
1126 | &timeparms, | |
1127 | data->minorversion, | |
1128 | data->net); | |
1129 | if (error < 0) | |
1130 | goto error; | |
1131 | ||
fcf10398 BS |
1132 | if (data->rsize) |
1133 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1134 | if (data->wsize) | |
1135 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1136 | ||
1137 | server->acregmin = data->acregmin * HZ; | |
1138 | server->acregmax = data->acregmax * HZ; | |
1139 | server->acdirmin = data->acdirmin * HZ; | |
1140 | server->acdirmax = data->acdirmax * HZ; | |
1141 | ||
1142 | server->port = data->nfs_server.port; | |
1143 | ||
a3f73c27 WAA |
1144 | error = nfs_init_server_rpcclient(server, &timeparms, |
1145 | data->selected_flavor); | |
fcf10398 BS |
1146 | |
1147 | error: | |
1148 | /* Done */ | |
1149 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1150 | return error; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * Create a version 4 volume record | |
1155 | * - keyed on server and FSID | |
1156 | */ | |
1179acc6 BS |
1157 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
1158 | struct nfs_fh *mntfh)*/ | |
1159 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
1160 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
1161 | { |
1162 | struct nfs_server *server; | |
5e6b1990 | 1163 | bool auth_probe; |
fcf10398 BS |
1164 | int error; |
1165 | ||
1166 | dprintk("--> nfs4_create_server()\n"); | |
1167 | ||
1168 | server = nfs_alloc_server(); | |
1169 | if (!server) | |
1170 | return ERR_PTR(-ENOMEM); | |
1171 | ||
a3f73c27 | 1172 | auth_probe = mount_info->parsed->auth_info.flavor_len < 1; |
5e6b1990 | 1173 | |
fcf10398 | 1174 | /* set up the general RPC client */ |
1179acc6 | 1175 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
1176 | if (error < 0) |
1177 | goto error; | |
1178 | ||
5e6b1990 | 1179 | error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); |
fcf10398 BS |
1180 | if (error < 0) |
1181 | goto error; | |
1182 | ||
1183 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1184 | return server; | |
1185 | ||
1186 | error: | |
1187 | nfs_free_server(server); | |
1188 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1189 | return ERR_PTR(error); | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * Create an NFS4 referral server record | |
1194 | */ | |
1195 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1196 | struct nfs_fh *mntfh) | |
1197 | { | |
1198 | struct nfs_client *parent_client; | |
1199 | struct nfs_server *server, *parent_server; | |
5837f6df | 1200 | bool auth_probe; |
fcf10398 BS |
1201 | int error; |
1202 | ||
1203 | dprintk("--> nfs4_create_referral_server()\n"); | |
1204 | ||
1205 | server = nfs_alloc_server(); | |
1206 | if (!server) | |
1207 | return ERR_PTR(-ENOMEM); | |
1208 | ||
1209 | parent_server = NFS_SB(data->sb); | |
1210 | parent_client = parent_server->nfs_client; | |
1211 | ||
1212 | /* Initialise the client representation from the parent server */ | |
1213 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 BS |
1214 | |
1215 | /* Get a client representation. | |
1216 | * Note: NFSv4 always uses TCP, */ | |
1217 | error = nfs4_set_client(server, data->hostname, | |
1218 | data->addr, | |
1219 | data->addrlen, | |
1220 | parent_client->cl_ipaddr, | |
fcf10398 BS |
1221 | rpc_protocol(parent_server->client), |
1222 | parent_server->client->cl_timeout, | |
1223 | parent_client->cl_mvops->minor_version, | |
1224 | parent_client->cl_net); | |
1225 | if (error < 0) | |
1226 | goto error; | |
1227 | ||
1228 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
1229 | if (error < 0) | |
1230 | goto error; | |
1231 | ||
5837f6df WAA |
1232 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1233 | ||
1234 | error = nfs4_server_common_setup(server, mntfh, auth_probe); | |
fcf10398 BS |
1235 | if (error < 0) |
1236 | goto error; | |
1237 | ||
1238 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1239 | return server; | |
1240 | ||
1241 | error: | |
1242 | nfs_free_server(server); | |
1243 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1244 | return ERR_PTR(error); | |
1245 | } | |
32e62b7c CL |
1246 | |
1247 | /* | |
1248 | * Grab the destination's particulars, including lease expiry time. | |
1249 | * | |
1250 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
1251 | * we have cached. | |
1252 | */ | |
1253 | static int nfs_probe_destination(struct nfs_server *server) | |
1254 | { | |
2b0143b5 | 1255 | struct inode *inode = d_inode(server->super->s_root); |
32e62b7c CL |
1256 | struct nfs_fattr *fattr; |
1257 | int error; | |
1258 | ||
1259 | fattr = nfs_alloc_fattr(); | |
1260 | if (fattr == NULL) | |
1261 | return -ENOMEM; | |
1262 | ||
1263 | /* Sanity: the probe won't work if the destination server | |
1264 | * does not recognize the migrated FH. */ | |
1265 | error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); | |
1266 | ||
1267 | nfs_free_fattr(fattr); | |
1268 | return error; | |
1269 | } | |
1270 | ||
1271 | /** | |
1272 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1273 | * | |
1274 | * @server: represents FSID to be moved | |
1275 | * @hostname: new end-point's hostname | |
1276 | * @sap: new end-point's socket address | |
1277 | * @salen: size of "sap" | |
292f503c | 1278 | * @net: net namespace |
32e62b7c CL |
1279 | * |
1280 | * The nfs_server must be quiescent before this function is invoked. | |
1281 | * Either its session is drained (NFSv4.1+), or its transport is | |
1282 | * plugged and drained (NFSv4.0). | |
1283 | * | |
1284 | * Returns zero on success, or a negative errno value. | |
1285 | */ | |
1286 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
292f503c | 1287 | struct sockaddr *sap, size_t salen, struct net *net) |
32e62b7c CL |
1288 | { |
1289 | struct nfs_client *clp = server->nfs_client; | |
1290 | struct rpc_clnt *clnt = server->client; | |
1291 | struct xprt_create xargs = { | |
1292 | .ident = clp->cl_proto, | |
292f503c | 1293 | .net = net, |
32e62b7c CL |
1294 | .dstaddr = sap, |
1295 | .addrlen = salen, | |
1296 | .servername = hostname, | |
1297 | }; | |
1298 | char buf[INET6_ADDRSTRLEN + 1]; | |
1299 | struct sockaddr_storage address; | |
1300 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1301 | int error; | |
1302 | ||
1303 | dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__, | |
1304 | (unsigned long long)server->fsid.major, | |
1305 | (unsigned long long)server->fsid.minor, | |
1306 | hostname); | |
1307 | ||
1308 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); | |
1309 | if (error != 0) { | |
1310 | dprintk("<-- %s(): rpc_switch_client_transport returned %d\n", | |
1311 | __func__, error); | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
1316 | if (error != 0) { | |
1317 | dprintk("<-- %s(): rpc_localaddr returned %d\n", | |
1318 | __func__, error); | |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | error = -EAFNOSUPPORT; | |
1323 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) { | |
1324 | dprintk("<-- %s(): rpc_ntop returned %d\n", | |
1325 | __func__, error); | |
1326 | goto out; | |
1327 | } | |
1328 | ||
1329 | nfs_server_remove_lists(server); | |
1330 | error = nfs4_set_client(server, hostname, sap, salen, buf, | |
32e62b7c | 1331 | clp->cl_proto, clnt->cl_timeout, |
292f503c | 1332 | clp->cl_minorversion, net); |
32e62b7c CL |
1333 | nfs_put_client(clp); |
1334 | if (error != 0) { | |
1335 | nfs_server_insert_lists(server); | |
1336 | dprintk("<-- %s(): nfs4_set_client returned %d\n", | |
1337 | __func__, error); | |
1338 | goto out; | |
1339 | } | |
1340 | ||
1341 | if (server->nfs_client->cl_hostname == NULL) | |
1342 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
1343 | nfs_server_insert_lists(server); | |
1344 | ||
1345 | error = nfs_probe_destination(server); | |
1346 | if (error < 0) | |
1347 | goto out; | |
1348 | ||
1349 | dprintk("<-- %s() succeeded\n", __func__); | |
1350 | ||
1351 | out: | |
1352 | return error; | |
1353 | } |