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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 | ||
bc0c9079 OK |
159 | static void |
160 | nfs4_cleanup_callback(struct nfs_client *clp) | |
161 | { | |
162 | struct nfs4_copy_state *cp_state; | |
163 | ||
164 | while (!list_empty(&clp->pending_cb_stateids)) { | |
165 | cp_state = list_entry(clp->pending_cb_stateids.next, | |
166 | struct nfs4_copy_state, copies); | |
167 | list_del(&cp_state->copies); | |
168 | kfree(cp_state); | |
169 | } | |
170 | } | |
171 | ||
abf79bb3 | 172 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
173 | { |
174 | if (nfs4_has_session(clp)) { | |
bc0c9079 | 175 | nfs4_cleanup_callback(clp); |
0e20162e | 176 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
177 | nfs4_destroy_session(clp->cl_session); |
178 | nfs4_destroy_clientid(clp); | |
179 | } | |
180 | ||
181 | } | |
abf79bb3 CL |
182 | #endif /* CONFIG_NFS_V4_1 */ |
183 | ||
184 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 185 | { |
abf79bb3 | 186 | if (clp->cl_slot_tbl) { |
20b9a902 | 187 | nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
abf79bb3 CL |
188 | kfree(clp->cl_slot_tbl); |
189 | } | |
ec409897 | 190 | } |
ec409897 BS |
191 | |
192 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
193 | { | |
194 | int err; | |
195 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
196 | if (IS_ERR(clp)) | |
197 | return clp; | |
198 | ||
199 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
200 | if (err) | |
201 | goto error; | |
202 | ||
42c2c424 SD |
203 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
204 | err = -EINVAL; | |
205 | goto error; | |
206 | } | |
207 | ||
ec409897 BS |
208 | spin_lock_init(&clp->cl_lock); |
209 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 210 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
211 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
212 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
213 | clp->cl_minorversion = cl_init->minorversion; | |
214 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
c9fdeb28 | 215 | clp->cl_mig_gen = 1; |
a1d617d8 JL |
216 | #if IS_ENABLED(CONFIG_NFS_V4_1) |
217 | init_waitqueue_head(&clp->cl_lock_waitq); | |
218 | #endif | |
bc0c9079 | 219 | INIT_LIST_HEAD(&clp->pending_cb_stateids); |
ec409897 BS |
220 | return clp; |
221 | ||
222 | error: | |
7653f6ff | 223 | nfs_free_client(clp); |
ec409897 BS |
224 | return ERR_PTR(err); |
225 | } | |
226 | ||
227 | /* | |
228 | * Destroy the NFS4 callback service | |
229 | */ | |
230 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
231 | { | |
232 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 233 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
234 | } |
235 | ||
236 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
237 | { | |
238 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
239 | nfs4_kill_renewd(clp); | |
abf79bb3 | 240 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
241 | nfs4_destroy_callback(clp); |
242 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
243 | nfs_idmap_delete(clp); | |
244 | ||
245 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
246 | kfree(clp->cl_serverowner); | |
247 | kfree(clp->cl_serverscope); | |
248 | kfree(clp->cl_implid); | |
ceb3a16c | 249 | kfree(clp->cl_owner_id); |
ec409897 BS |
250 | } |
251 | ||
252 | void nfs4_free_client(struct nfs_client *clp) | |
253 | { | |
254 | nfs4_shutdown_client(clp); | |
255 | nfs_free_client(clp); | |
256 | } | |
257 | ||
428360d7 BS |
258 | /* |
259 | * Initialize the NFS4 callback service | |
260 | */ | |
261 | static int nfs4_init_callback(struct nfs_client *clp) | |
262 | { | |
c2ef47b7 | 263 | struct rpc_xprt *xprt; |
428360d7 BS |
264 | int error; |
265 | ||
c2ef47b7 | 266 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
428360d7 | 267 | |
c2ef47b7 CL |
268 | if (nfs4_has_session(clp)) { |
269 | error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
270 | if (error < 0) | |
428360d7 | 271 | return error; |
428360d7 | 272 | } |
c2ef47b7 CL |
273 | |
274 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
275 | if (error < 0) { | |
276 | dprintk("%s: failed to start callback. Error = %d\n", | |
277 | __func__, error); | |
278 | return error; | |
279 | } | |
280 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
281 | ||
428360d7 BS |
282 | return 0; |
283 | } | |
284 | ||
abf79bb3 CL |
285 | /** |
286 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
287 | * @clp - nfs_client to initialize | |
288 | * | |
289 | * Returns zero on success, or a negative errno if some error occurred. | |
290 | */ | |
291 | int nfs40_init_client(struct nfs_client *clp) | |
292 | { | |
293 | struct nfs4_slot_table *tbl; | |
294 | int ret; | |
295 | ||
296 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
297 | if (tbl == NULL) | |
298 | return -ENOMEM; | |
299 | ||
300 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
301 | "NFSv4.0 transport Slot table"); | |
302 | if (ret) { | |
303 | kfree(tbl); | |
304 | return ret; | |
305 | } | |
306 | ||
307 | clp->cl_slot_tbl = tbl; | |
308 | return 0; | |
309 | } | |
310 | ||
311 | #if defined(CONFIG_NFS_V4_1) | |
312 | ||
313 | /** | |
314 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
315 | * @clp - nfs_client to initialize | |
316 | * | |
317 | * Returns zero on success, or a negative errno if some error occurred. | |
318 | */ | |
319 | int nfs41_init_client(struct nfs_client *clp) | |
320 | { | |
321 | struct nfs4_session *session = NULL; | |
322 | ||
323 | /* | |
324 | * Create the session and mark it expired. | |
325 | * When a SEQUENCE operation encounters the expired session | |
326 | * it will do session recovery to initialize it. | |
327 | */ | |
328 | session = nfs4_alloc_session(clp); | |
329 | if (!session) | |
330 | return -ENOMEM; | |
331 | ||
332 | clp->cl_session = session; | |
333 | ||
334 | /* | |
335 | * The create session reply races with the server back | |
336 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
337 | * so that the client back channel can find the | |
338 | * nfs_client struct | |
339 | */ | |
340 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
341 | return 0; | |
342 | } | |
343 | ||
344 | #endif /* CONFIG_NFS_V4_1 */ | |
345 | ||
428360d7 BS |
346 | /* |
347 | * Initialize the minor version specific parts of an NFS4 client record | |
348 | */ | |
349 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
350 | { | |
abf79bb3 | 351 | int ret; |
428360d7 | 352 | |
abf79bb3 CL |
353 | ret = clp->cl_mvops->init_client(clp); |
354 | if (ret) | |
355 | return ret; | |
428360d7 BS |
356 | return nfs4_init_callback(clp); |
357 | } | |
358 | ||
359 | /** | |
360 | * nfs4_init_client - Initialise an NFS4 client record | |
361 | * | |
362 | * @clp: nfs_client to initialise | |
363 | * @timeparms: timeout parameters for underlying RPC transport | |
364 | * @ip_addr: callback IP address in presentation format | |
365 | * @authflavor: authentication flavor for underlying RPC transport | |
366 | * | |
367 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
368 | */ | |
369 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
5c6e5b60 | 370 | const struct nfs_client_initdata *cl_init) |
428360d7 BS |
371 | { |
372 | char buf[INET6_ADDRSTRLEN + 1]; | |
5c6e5b60 | 373 | const char *ip_addr = cl_init->ip_addr; |
05f4c350 | 374 | struct nfs_client *old; |
428360d7 BS |
375 | int error; |
376 | ||
4fe6b366 | 377 | if (clp->cl_cons_state == NFS_CS_READY) |
428360d7 | 378 | /* the client is initialised already */ |
428360d7 | 379 | return clp; |
428360d7 BS |
380 | |
381 | /* Check NFS protocol revision and initialize RPC op vector */ | |
382 | clp->rpc_ops = &nfs_v4_clientops; | |
383 | ||
98f98cf5 TM |
384 | if (clp->cl_minorversion != 0) |
385 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 386 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
99875249 | 387 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
6aa23d76 | 388 | |
5c6e5b60 | 389 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); |
23631227 | 390 | if (error == -EINVAL) |
5c6e5b60 | 391 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
428360d7 BS |
392 | if (error < 0) |
393 | goto error; | |
394 | ||
395 | /* If no clientaddr= option was specified, find a usable cb address */ | |
396 | if (ip_addr == NULL) { | |
397 | struct sockaddr_storage cb_addr; | |
398 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
399 | ||
400 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
401 | if (error < 0) | |
402 | goto error; | |
403 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
404 | if (error < 0) | |
405 | goto error; | |
406 | ip_addr = (const char *)buf; | |
407 | } | |
408 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
409 | ||
410 | error = nfs_idmap_new(clp); | |
411 | if (error < 0) { | |
412 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
413 | __func__, error); | |
414 | goto error; | |
415 | } | |
416 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
417 | ||
418 | error = nfs4_init_client_minor_version(clp); | |
419 | if (error < 0) | |
420 | goto error; | |
421 | ||
05f4c350 CL |
422 | error = nfs4_discover_server_trunking(clp, &old); |
423 | if (error < 0) | |
424 | goto error; | |
05f4c350 | 425 | |
c156618e | 426 | if (clp != old) { |
abad2fa5 | 427 | clp->cl_preserve_clid = true; |
c156618e SM |
428 | /* |
429 | * Mark the client as having failed initialization so other | |
430 | * processes walking the nfs_client_list in nfs_match_client() | |
431 | * won't try to use it. | |
432 | */ | |
433 | nfs_mark_client_ready(clp, -EPERM); | |
434 | } | |
abad2fa5 | 435 | nfs_put_client(clp); |
8dcbec6d | 436 | clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
abad2fa5 | 437 | return old; |
428360d7 BS |
438 | |
439 | error: | |
440 | nfs_mark_client_ready(clp, error); | |
441 | nfs_put_client(clp); | |
428360d7 BS |
442 | return ERR_PTR(error); |
443 | } | |
fcf10398 | 444 | |
05f4c350 CL |
445 | /* |
446 | * SETCLIENTID just did a callback update with the callback ident in | |
447 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
448 | * actually the same server. Swap the callback IDs so that "keep" | |
449 | * will continue to use the callback ident the server now knows about, | |
450 | * and so that "keep"'s original callback ident is destroyed when | |
451 | * "drop" is freed. | |
452 | */ | |
453 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
454 | struct nfs_client *drop) | |
455 | { | |
456 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
457 | unsigned int save = keep->cl_cb_ident; | |
458 | ||
459 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
460 | return; | |
461 | ||
462 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
463 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
464 | ||
465 | spin_lock(&nn->nfs_client_lock); | |
466 | ||
467 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
468 | keep->cl_cb_ident = drop->cl_cb_ident; | |
469 | ||
470 | idr_replace(&nn->cb_ident_idr, drop, save); | |
471 | drop->cl_cb_ident = save; | |
472 | ||
473 | spin_unlock(&nn->nfs_client_lock); | |
474 | } | |
475 | ||
55b9df93 TM |
476 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
477 | const struct nfs_client *clp2) | |
478 | { | |
479 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
480 | return true; | |
481 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
482 | } | |
483 | ||
ced85a75 BF |
484 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
485 | { | |
486 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
487 | } | |
488 | ||
14d1bbb0 AS |
489 | static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
490 | struct nfs_client **prev, struct nfs_net *nn) | |
491 | { | |
492 | int status; | |
493 | ||
494 | if (pos->rpc_ops != new->rpc_ops) | |
495 | return 1; | |
496 | ||
497 | if (pos->cl_minorversion != new->cl_minorversion) | |
498 | return 1; | |
499 | ||
500 | /* If "pos" isn't marked ready, we can't trust the | |
501 | * remaining fields in "pos", especially the client | |
502 | * ID and serverowner fields. Wait for CREATE_SESSION | |
503 | * to finish. */ | |
504 | if (pos->cl_cons_state > NFS_CS_READY) { | |
212bf41d | 505 | refcount_inc(&pos->cl_count); |
14d1bbb0 AS |
506 | spin_unlock(&nn->nfs_client_lock); |
507 | ||
508 | nfs_put_client(*prev); | |
509 | *prev = pos; | |
510 | ||
511 | status = nfs_wait_client_init_complete(pos); | |
512 | spin_lock(&nn->nfs_client_lock); | |
513 | ||
514 | if (status < 0) | |
515 | return status; | |
516 | } | |
517 | ||
518 | if (pos->cl_cons_state != NFS_CS_READY) | |
519 | return 1; | |
520 | ||
521 | if (pos->cl_clientid != new->cl_clientid) | |
522 | return 1; | |
523 | ||
524 | /* NFSv4.1 always uses the uniform string, however someone | |
525 | * might switch the uniquifier string on us. | |
526 | */ | |
527 | if (!nfs4_match_client_owner_id(pos, new)) | |
528 | return 1; | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
05f4c350 CL |
533 | /** |
534 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
535 | * | |
536 | * @new: nfs_client with client ID to test | |
537 | * @result: OUT: found nfs_client, or new | |
538 | * @cred: credential to use for trunking test | |
539 | * | |
540 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
541 | * If zero is returned, an nfs_client pointer is planted in "result." | |
542 | * | |
543 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
544 | * the last nfs_client on the list. | |
545 | */ | |
546 | int nfs40_walk_client_list(struct nfs_client *new, | |
547 | struct nfs_client **result, | |
548 | struct rpc_cred *cred) | |
549 | { | |
550 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 551 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
552 | struct nfs4_setclientid_res clid = { |
553 | .clientid = new->cl_clientid, | |
554 | .confirm = new->cl_confirm, | |
555 | }; | |
4ae19c2d | 556 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
557 | |
558 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 559 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 560 | |
c156618e SM |
561 | if (pos == new) |
562 | goto found; | |
563 | ||
14d1bbb0 AS |
564 | status = nfs4_match_client(pos, new, &prev, nn); |
565 | if (status < 0) | |
566 | goto out_unlock; | |
567 | if (status != 0) | |
55b9df93 | 568 | continue; |
ced85a75 BF |
569 | /* |
570 | * We just sent a new SETCLIENTID, which should have | |
571 | * caused the server to return a new cl_confirm. So if | |
572 | * cl_confirm is the same, then this is a different | |
573 | * server that just returned the same cl_confirm by | |
574 | * coincidence: | |
575 | */ | |
576 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
577 | &new->cl_confirm)) | |
578 | continue; | |
579 | /* | |
580 | * But if the cl_confirm's are different, then the only | |
581 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
582 | * if new and pos point to the same server: | |
583 | */ | |
c156618e | 584 | found: |
212bf41d | 585 | refcount_inc(&pos->cl_count); |
05f4c350 CL |
586 | spin_unlock(&nn->nfs_client_lock); |
587 | ||
fe0bf118 | 588 | nfs_put_client(prev); |
4ae19c2d | 589 | prev = pos; |
05f4c350 CL |
590 | |
591 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
592 | switch (status) { |
593 | case -NFS4ERR_STALE_CLIENTID: | |
594 | break; | |
595 | case 0: | |
05f4c350 | 596 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 597 | pos->cl_confirm = new->cl_confirm; |
c156618e | 598 | nfs_mark_client_ready(pos, NFS_CS_READY); |
05f4c350 | 599 | |
4ae19c2d | 600 | prev = NULL; |
05f4c350 | 601 | *result = pos; |
f9b7ebdf TM |
602 | goto out; |
603 | case -ERESTARTSYS: | |
604 | case -ETIMEDOUT: | |
605 | /* The callback path may have been inadvertently | |
606 | * changed. Schedule recovery! | |
607 | */ | |
608 | nfs4_schedule_path_down_recovery(pos); | |
4ae19c2d TM |
609 | default: |
610 | goto out; | |
05f4c350 CL |
611 | } |
612 | ||
613 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 614 | } |
14d1bbb0 | 615 | out_unlock: |
4ae19c2d | 616 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 617 | |
202c312d | 618 | /* No match found. The server lost our clientid */ |
4ae19c2d | 619 | out: |
fe0bf118 | 620 | nfs_put_client(prev); |
4ae19c2d | 621 | return status; |
05f4c350 CL |
622 | } |
623 | ||
624 | #ifdef CONFIG_NFS_V4_1 | |
625 | /* | |
1fc0703a | 626 | * Returns true if the server major ids match |
05f4c350 CL |
627 | */ |
628 | static bool | |
e7b7cbf6 AA |
629 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
630 | struct nfs41_server_owner *o2) | |
05f4c350 | 631 | { |
05f4c350 | 632 | if (o1->major_id_sz != o2->major_id_sz) |
ddfa0d48 AS |
633 | return false; |
634 | return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; | |
05f4c350 CL |
635 | } |
636 | ||
ba84db96 AA |
637 | /* |
638 | * Returns true if the server scopes match | |
639 | */ | |
640 | static bool | |
641 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
642 | struct nfs41_server_scope *s2) | |
643 | { | |
644 | if (s1->server_scope_sz != s2->server_scope_sz) | |
8da0f934 AS |
645 | return false; |
646 | return memcmp(s1->server_scope, s2->server_scope, | |
647 | s1->server_scope_sz) == 0; | |
ba84db96 AA |
648 | } |
649 | ||
650 | /** | |
ad0849a7 AA |
651 | * nfs4_detect_session_trunking - Checks for session trunking. |
652 | * | |
653 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
654 | * Upon success, add the transport. | |
ba84db96 AA |
655 | * |
656 | * @clp: original mount nfs_client | |
657 | * @res: result structure from an exchange_id using the original mount | |
658 | * nfs_client with a new multi_addr transport | |
659 | * | |
660 | * Returns zero on success, otherwise -EINVAL | |
661 | * | |
662 | * Note: since the exchange_id for the new multi_addr transport uses the | |
663 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
664 | * so eir_clientowner is the same. | |
665 | */ | |
666 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
667 | struct nfs41_exchange_id_res *res, | |
668 | struct rpc_xprt *xprt) | |
669 | { | |
670 | /* Check eir_clientid */ | |
f251fd9e | 671 | if (clp->cl_clientid != res->clientid) |
ba84db96 AA |
672 | goto out_err; |
673 | ||
674 | /* Check eir_server_owner so_major_id */ | |
675 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
676 | res->server_owner)) | |
677 | goto out_err; | |
678 | ||
679 | /* Check eir_server_owner so_minor_id */ | |
5b6d3ff6 | 680 | if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
ba84db96 AA |
681 | goto out_err; |
682 | ||
683 | /* Check eir_server_scope */ | |
684 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
685 | goto out_err; | |
686 | ||
687 | pr_info("NFS: %s: Session trunking succeeded for %s\n", | |
688 | clp->cl_hostname, | |
689 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
690 | ||
691 | return 0; | |
692 | out_err: | |
693 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
694 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
695 | ||
696 | return -EINVAL; | |
697 | } | |
698 | ||
05f4c350 CL |
699 | /** |
700 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
701 | * | |
702 | * @new: nfs_client with client ID to test | |
703 | * @result: OUT: found nfs_client, or new | |
704 | * @cred: credential to use for trunking test | |
705 | * | |
706 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
707 | * If zero is returned, an nfs_client pointer is planted in "result." | |
708 | * | |
709 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
710 | * the last nfs_client on the list. | |
711 | */ | |
712 | int nfs41_walk_client_list(struct nfs_client *new, | |
713 | struct nfs_client **result, | |
714 | struct rpc_cred *cred) | |
715 | { | |
716 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 717 | struct nfs_client *pos, *prev = NULL; |
202c312d | 718 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
719 | |
720 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 721 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 722 | |
48d66b97 TM |
723 | if (pos == new) |
724 | goto found; | |
725 | ||
14d1bbb0 AS |
726 | status = nfs4_match_client(pos, new, &prev, nn); |
727 | if (status < 0) | |
728 | goto out; | |
729 | if (status != 0) | |
05f4c350 CL |
730 | continue; |
731 | ||
1fc0703a TM |
732 | /* |
733 | * Note that session trunking is just a special subcase of | |
734 | * client id trunking. In either case, we want to fall back | |
735 | * to using the existing nfs_client. | |
736 | */ | |
e7b7cbf6 AA |
737 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
738 | new->cl_serverowner)) | |
05f4c350 CL |
739 | continue; |
740 | ||
48d66b97 | 741 | found: |
212bf41d | 742 | refcount_inc(&pos->cl_count); |
7b1f1fd1 | 743 | *result = pos; |
eb04e0ac | 744 | status = 0; |
7b1f1fd1 | 745 | break; |
05f4c350 CL |
746 | } |
747 | ||
14d1bbb0 | 748 | out: |
05f4c350 | 749 | spin_unlock(&nn->nfs_client_lock); |
fe0bf118 | 750 | nfs_put_client(prev); |
202c312d | 751 | return status; |
05f4c350 CL |
752 | } |
753 | #endif /* CONFIG_NFS_V4_1 */ | |
754 | ||
fcf10398 BS |
755 | static void nfs4_destroy_server(struct nfs_server *server) |
756 | { | |
757 | nfs_server_return_all_delegations(server); | |
758 | unset_pnfs_layoutdriver(server); | |
759 | nfs4_purge_state_owners(server); | |
760 | } | |
761 | ||
762 | /* | |
763 | * NFSv4.0 callback thread helper | |
764 | * | |
765 | * Find a client by callback identifier | |
766 | */ | |
767 | struct nfs_client * | |
768 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
769 | { | |
770 | struct nfs_client *clp; | |
771 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
772 | ||
773 | spin_lock(&nn->nfs_client_lock); | |
774 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
775 | if (clp) | |
212bf41d | 776 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
777 | spin_unlock(&nn->nfs_client_lock); |
778 | return clp; | |
779 | } | |
780 | ||
781 | #if defined(CONFIG_NFS_V4_1) | |
782 | /* Common match routine for v4.0 and v4.1 callback services */ | |
783 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
784 | struct nfs_client *clp, u32 minorversion) | |
785 | { | |
786 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
787 | ||
788 | /* Don't match clients that failed to initialise */ | |
789 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
790 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
791 | return false; | |
792 | ||
793 | smp_rmb(); | |
794 | ||
795 | /* Match the version and minorversion */ | |
796 | if (clp->rpc_ops->version != 4 || | |
797 | clp->cl_minorversion != minorversion) | |
798 | return false; | |
799 | ||
800 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 801 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
802 | } |
803 | ||
804 | /* | |
805 | * NFSv4.1 callback thread helper | |
806 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
807 | * minorversion, and sessionID | |
808 | * | |
809 | * Returns NULL if no such client | |
810 | */ | |
811 | struct nfs_client * | |
812 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 813 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
814 | { |
815 | struct nfs_client *clp; | |
816 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
817 | ||
818 | spin_lock(&nn->nfs_client_lock); | |
819 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
6089dd0d | 820 | if (!nfs4_cb_match_client(addr, clp, minorversion)) |
fcf10398 BS |
821 | continue; |
822 | ||
823 | if (!nfs4_has_session(clp)) | |
824 | continue; | |
825 | ||
826 | /* Match sessionid*/ | |
827 | if (memcmp(clp->cl_session->sess_id.data, | |
828 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
829 | continue; | |
830 | ||
212bf41d | 831 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
832 | spin_unlock(&nn->nfs_client_lock); |
833 | return clp; | |
834 | } | |
835 | spin_unlock(&nn->nfs_client_lock); | |
836 | return NULL; | |
837 | } | |
838 | ||
839 | #else /* CONFIG_NFS_V4_1 */ | |
840 | ||
841 | struct nfs_client * | |
842 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 843 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
844 | { |
845 | return NULL; | |
846 | } | |
847 | #endif /* CONFIG_NFS_V4_1 */ | |
848 | ||
849 | /* | |
850 | * Set up an NFS4 client | |
851 | */ | |
852 | static int nfs4_set_client(struct nfs_server *server, | |
853 | const char *hostname, | |
854 | const struct sockaddr *addr, | |
855 | const size_t addrlen, | |
856 | const char *ip_addr, | |
fcf10398 BS |
857 | int proto, const struct rpc_timeout *timeparms, |
858 | u32 minorversion, struct net *net) | |
859 | { | |
860 | struct nfs_client_initdata cl_init = { | |
861 | .hostname = hostname, | |
862 | .addr = addr, | |
863 | .addrlen = addrlen, | |
5c6e5b60 | 864 | .ip_addr = ip_addr, |
ab7017a3 | 865 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
866 | .proto = proto, |
867 | .minorversion = minorversion, | |
868 | .net = net, | |
5c6e5b60 | 869 | .timeparms = timeparms, |
fcf10398 BS |
870 | }; |
871 | struct nfs_client *clp; | |
fcf10398 BS |
872 | |
873 | if (server->flags & NFS_MOUNT_NORESVPORT) | |
874 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
875 | if (server->options & NFS_OPTION_MIGRATION) |
876 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
8dcbec6d CL |
877 | if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
878 | set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); | |
801b5643 | 879 | server->port = rpc_get_port(addr); |
fcf10398 BS |
880 | |
881 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 882 | clp = nfs_get_client(&cl_init); |
2dc42c0d AS |
883 | if (IS_ERR(clp)) |
884 | return PTR_ERR(clp); | |
fcf10398 | 885 | |
ad86f605 BB |
886 | if (server->nfs_client == clp) { |
887 | nfs_put_client(clp); | |
2dc42c0d | 888 | return -ELOOP; |
ad86f605 | 889 | } |
52442f9b | 890 | |
fcf10398 BS |
891 | /* |
892 | * Query for the lease time on clientid setup or renewal | |
893 | * | |
894 | * Note that this will be set on nfs_clients that were created | |
895 | * only for the DS role and did not set this bit, but now will | |
896 | * serve a dual role. | |
897 | */ | |
898 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
899 | ||
900 | server->nfs_client = clp; | |
fcf10398 | 901 | return 0; |
fcf10398 BS |
902 | } |
903 | ||
904 | /* | |
905 | * Set up a pNFS Data Server client. | |
906 | * | |
907 | * Return any existing nfs_client that matches server address,port,version | |
908 | * and minorversion. | |
909 | * | |
910 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
911 | * low timeout interval so that if a connection is lost, we retry through | |
912 | * the MDS. | |
913 | */ | |
3fc75f12 | 914 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
fcf10398 | 915 | const struct sockaddr *ds_addr, int ds_addrlen, |
064172f3 | 916 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 917 | u32 minor_version) |
fcf10398 | 918 | { |
5c6e5b60 | 919 | struct rpc_timeout ds_timeout; |
3fc75f12 | 920 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
921 | struct nfs_client_initdata cl_init = { |
922 | .addr = ds_addr, | |
923 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
924 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
925 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 926 | .nfs_mod = &nfs_v4, |
fcf10398 | 927 | .proto = ds_proto, |
30626f9c | 928 | .minorversion = minor_version, |
fcf10398 | 929 | .net = mds_clp->cl_net, |
5c6e5b60 | 930 | .timeparms = &ds_timeout, |
fcf10398 | 931 | }; |
a363e32e PT |
932 | char buf[INET6_ADDRSTRLEN + 1]; |
933 | ||
934 | if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0) | |
935 | return ERR_PTR(-EINVAL); | |
936 | cl_init.hostname = buf; | |
fcf10398 | 937 | |
3fc75f12 TM |
938 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
939 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
940 | ||
fcf10398 BS |
941 | /* |
942 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
943 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
944 | * (section 13.1 RFC 5661). | |
945 | */ | |
946 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
4fe6b366 | 947 | return nfs_get_client(&cl_init); |
fcf10398 BS |
948 | } |
949 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
950 | ||
951 | /* | |
952 | * Session has been established, and the client marked ready. | |
943cff67 TM |
953 | * Limit the mount rsize, wsize and dtsize using negotiated fore |
954 | * channel attributes. | |
fcf10398 | 955 | */ |
943cff67 | 956 | static void nfs4_session_limit_rwsize(struct nfs_server *server) |
fcf10398 BS |
957 | { |
958 | #ifdef CONFIG_NFS_V4_1 | |
959 | struct nfs4_session *sess; | |
960 | u32 server_resp_sz; | |
961 | u32 server_rqst_sz; | |
962 | ||
963 | if (!nfs4_has_session(server->nfs_client)) | |
964 | return; | |
965 | sess = server->nfs_client->cl_session; | |
966 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
967 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
968 | ||
943cff67 TM |
969 | if (server->dtsize > server_resp_sz) |
970 | server->dtsize = server_resp_sz; | |
971 | if (server->rsize > server_resp_sz) | |
fcf10398 | 972 | server->rsize = server_resp_sz; |
943cff67 | 973 | if (server->wsize > server_rqst_sz) |
fcf10398 BS |
974 | server->wsize = server_rqst_sz; |
975 | #endif /* CONFIG_NFS_V4_1 */ | |
976 | } | |
977 | ||
978 | static int nfs4_server_common_setup(struct nfs_server *server, | |
5e6b1990 | 979 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 BS |
980 | { |
981 | struct nfs_fattr *fattr; | |
982 | int error; | |
983 | ||
fcf10398 BS |
984 | /* data servers support only a subset of NFSv4.1 */ |
985 | if (is_ds_only_client(server->nfs_client)) | |
986 | return -EPROTONOSUPPORT; | |
987 | ||
988 | fattr = nfs_alloc_fattr(); | |
989 | if (fattr == NULL) | |
990 | return -ENOMEM; | |
991 | ||
992 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 993 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
994 | if (error < 0) |
995 | goto out; | |
996 | ||
39c6daae TM |
997 | /* Set the basic capabilities */ |
998 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
999 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
1000 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
1001 | /* | |
1002 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1003 | * authentication. | |
1004 | */ | |
1005 | if (nfs4_disable_idmapping && | |
1006 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
1007 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1008 | ||
1009 | ||
fcf10398 | 1010 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 1011 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
1012 | if (error < 0) |
1013 | goto out; | |
1014 | ||
1015 | dprintk("Server FSID: %llx:%llx\n", | |
1016 | (unsigned long long) server->fsid.major, | |
1017 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 1018 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 | 1019 | |
fcf10398 BS |
1020 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
1021 | if (error < 0) | |
1022 | goto out; | |
1023 | ||
943cff67 TM |
1024 | nfs4_session_limit_rwsize(server); |
1025 | ||
fcf10398 BS |
1026 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1027 | server->namelen = NFS4_MAXNAMLEN; | |
1028 | ||
1029 | nfs_server_insert_lists(server); | |
1030 | server->mount_time = jiffies; | |
1031 | server->destroy = nfs4_destroy_server; | |
1032 | out: | |
1033 | nfs_free_fattr(fattr); | |
1034 | return error; | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * Create a version 4 volume record | |
1039 | */ | |
1040 | static int nfs4_init_server(struct nfs_server *server, | |
a3f73c27 | 1041 | struct nfs_parsed_mount_data *data) |
fcf10398 BS |
1042 | { |
1043 | struct rpc_timeout timeparms; | |
1044 | int error; | |
1045 | ||
fcf10398 BS |
1046 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1047 | data->timeo, data->retrans); | |
1048 | ||
1049 | /* Initialise the client representation from the mount data */ | |
1050 | server->flags = data->flags; | |
fcf10398 | 1051 | server->options = data->options; |
0f5f49b8 | 1052 | server->auth_info = data->auth_info; |
fcf10398 | 1053 | |
4d4b69dd WAA |
1054 | /* Use the first specified auth flavor. If this flavor isn't |
1055 | * allowed by the server, use the SECINFO path to try the | |
1056 | * other specified flavors */ | |
a3f73c27 WAA |
1057 | if (data->auth_info.flavor_len >= 1) |
1058 | data->selected_flavor = data->auth_info.flavors[0]; | |
1059 | else | |
1060 | data->selected_flavor = RPC_AUTH_UNIX; | |
5e6b1990 | 1061 | |
fcf10398 BS |
1062 | /* Get a client record */ |
1063 | error = nfs4_set_client(server, | |
1064 | data->nfs_server.hostname, | |
1065 | (const struct sockaddr *)&data->nfs_server.address, | |
1066 | data->nfs_server.addrlen, | |
1067 | data->client_address, | |
fcf10398 BS |
1068 | data->nfs_server.protocol, |
1069 | &timeparms, | |
1070 | data->minorversion, | |
1071 | data->net); | |
1072 | if (error < 0) | |
1073d9b4 | 1073 | return error; |
fcf10398 | 1074 | |
fcf10398 BS |
1075 | if (data->rsize) |
1076 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1077 | if (data->wsize) | |
1078 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1079 | ||
1080 | server->acregmin = data->acregmin * HZ; | |
1081 | server->acregmax = data->acregmax * HZ; | |
1082 | server->acdirmin = data->acdirmin * HZ; | |
1083 | server->acdirmax = data->acdirmax * HZ; | |
1073d9b4 | 1084 | server->port = data->nfs_server.port; |
fcf10398 | 1085 | |
1073d9b4 AS |
1086 | return nfs_init_server_rpcclient(server, &timeparms, |
1087 | data->selected_flavor); | |
fcf10398 BS |
1088 | } |
1089 | ||
1090 | /* | |
1091 | * Create a version 4 volume record | |
1092 | * - keyed on server and FSID | |
1093 | */ | |
1179acc6 BS |
1094 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
1095 | struct nfs_fh *mntfh)*/ | |
1096 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
1097 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
1098 | { |
1099 | struct nfs_server *server; | |
5e6b1990 | 1100 | bool auth_probe; |
fcf10398 BS |
1101 | int error; |
1102 | ||
fcf10398 BS |
1103 | server = nfs_alloc_server(); |
1104 | if (!server) | |
1105 | return ERR_PTR(-ENOMEM); | |
1106 | ||
a3f73c27 | 1107 | auth_probe = mount_info->parsed->auth_info.flavor_len < 1; |
5e6b1990 | 1108 | |
fcf10398 | 1109 | /* set up the general RPC client */ |
1179acc6 | 1110 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
1111 | if (error < 0) |
1112 | goto error; | |
1113 | ||
5e6b1990 | 1114 | error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); |
fcf10398 BS |
1115 | if (error < 0) |
1116 | goto error; | |
1117 | ||
fcf10398 BS |
1118 | return server; |
1119 | ||
1120 | error: | |
1121 | nfs_free_server(server); | |
fcf10398 BS |
1122 | return ERR_PTR(error); |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * Create an NFS4 referral server record | |
1127 | */ | |
1128 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1129 | struct nfs_fh *mntfh) | |
1130 | { | |
1131 | struct nfs_client *parent_client; | |
1132 | struct nfs_server *server, *parent_server; | |
5837f6df | 1133 | bool auth_probe; |
fcf10398 BS |
1134 | int error; |
1135 | ||
fcf10398 BS |
1136 | server = nfs_alloc_server(); |
1137 | if (!server) | |
1138 | return ERR_PTR(-ENOMEM); | |
1139 | ||
1140 | parent_server = NFS_SB(data->sb); | |
1141 | parent_client = parent_server->nfs_client; | |
1142 | ||
1143 | /* Initialise the client representation from the parent server */ | |
1144 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 | 1145 | |
530ea421 | 1146 | /* Get a client representation */ |
23a88ade | 1147 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 | 1148 | rpc_set_port(data->addr, NFS_RDMA_PORT); |
fcf10398 BS |
1149 | error = nfs4_set_client(server, data->hostname, |
1150 | data->addr, | |
1151 | data->addrlen, | |
1152 | parent_client->cl_ipaddr, | |
530ea421 CL |
1153 | XPRT_TRANSPORT_RDMA, |
1154 | parent_server->client->cl_timeout, | |
1155 | parent_client->cl_mvops->minor_version, | |
1156 | parent_client->cl_net); | |
1157 | if (!error) | |
1158 | goto init_server; | |
23a88ade | 1159 | #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ |
530ea421 CL |
1160 | |
1161 | rpc_set_port(data->addr, NFS_PORT); | |
1162 | error = nfs4_set_client(server, data->hostname, | |
1163 | data->addr, | |
1164 | data->addrlen, | |
1165 | parent_client->cl_ipaddr, | |
1166 | XPRT_TRANSPORT_TCP, | |
fcf10398 BS |
1167 | parent_server->client->cl_timeout, |
1168 | parent_client->cl_mvops->minor_version, | |
1169 | parent_client->cl_net); | |
1170 | if (error < 0) | |
1171 | goto error; | |
1172 | ||
23a88ade | 1173 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 CL |
1174 | init_server: |
1175 | #endif | |
fcf10398 BS |
1176 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
1177 | if (error < 0) | |
1178 | goto error; | |
1179 | ||
5837f6df WAA |
1180 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1181 | ||
1182 | error = nfs4_server_common_setup(server, mntfh, auth_probe); | |
fcf10398 BS |
1183 | if (error < 0) |
1184 | goto error; | |
1185 | ||
fcf10398 BS |
1186 | return server; |
1187 | ||
1188 | error: | |
1189 | nfs_free_server(server); | |
fcf10398 BS |
1190 | return ERR_PTR(error); |
1191 | } | |
32e62b7c CL |
1192 | |
1193 | /* | |
1194 | * Grab the destination's particulars, including lease expiry time. | |
1195 | * | |
1196 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
1197 | * we have cached. | |
1198 | */ | |
1199 | static int nfs_probe_destination(struct nfs_server *server) | |
1200 | { | |
2b0143b5 | 1201 | struct inode *inode = d_inode(server->super->s_root); |
32e62b7c CL |
1202 | struct nfs_fattr *fattr; |
1203 | int error; | |
1204 | ||
1205 | fattr = nfs_alloc_fattr(); | |
1206 | if (fattr == NULL) | |
1207 | return -ENOMEM; | |
1208 | ||
1209 | /* Sanity: the probe won't work if the destination server | |
1210 | * does not recognize the migrated FH. */ | |
1211 | error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); | |
1212 | ||
1213 | nfs_free_fattr(fattr); | |
1214 | return error; | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1219 | * | |
1220 | * @server: represents FSID to be moved | |
1221 | * @hostname: new end-point's hostname | |
1222 | * @sap: new end-point's socket address | |
1223 | * @salen: size of "sap" | |
292f503c | 1224 | * @net: net namespace |
32e62b7c CL |
1225 | * |
1226 | * The nfs_server must be quiescent before this function is invoked. | |
1227 | * Either its session is drained (NFSv4.1+), or its transport is | |
1228 | * plugged and drained (NFSv4.0). | |
1229 | * | |
1230 | * Returns zero on success, or a negative errno value. | |
1231 | */ | |
1232 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
292f503c | 1233 | struct sockaddr *sap, size_t salen, struct net *net) |
32e62b7c CL |
1234 | { |
1235 | struct nfs_client *clp = server->nfs_client; | |
1236 | struct rpc_clnt *clnt = server->client; | |
1237 | struct xprt_create xargs = { | |
1238 | .ident = clp->cl_proto, | |
292f503c | 1239 | .net = net, |
32e62b7c CL |
1240 | .dstaddr = sap, |
1241 | .addrlen = salen, | |
1242 | .servername = hostname, | |
1243 | }; | |
1244 | char buf[INET6_ADDRSTRLEN + 1]; | |
1245 | struct sockaddr_storage address; | |
1246 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1247 | int error; | |
1248 | ||
32e62b7c | 1249 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
4fe6b366 AS |
1250 | if (error != 0) |
1251 | return error; | |
32e62b7c CL |
1252 | |
1253 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
4fe6b366 AS |
1254 | if (error != 0) |
1255 | return error; | |
32e62b7c | 1256 | |
4fe6b366 AS |
1257 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
1258 | return -EAFNOSUPPORT; | |
32e62b7c CL |
1259 | |
1260 | nfs_server_remove_lists(server); | |
8dcbec6d | 1261 | set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c | 1262 | error = nfs4_set_client(server, hostname, sap, salen, buf, |
32e62b7c | 1263 | clp->cl_proto, clnt->cl_timeout, |
292f503c | 1264 | clp->cl_minorversion, net); |
8dcbec6d | 1265 | clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c CL |
1266 | if (error != 0) { |
1267 | nfs_server_insert_lists(server); | |
4fe6b366 | 1268 | return error; |
32e62b7c | 1269 | } |
ad86f605 | 1270 | nfs_put_client(clp); |
32e62b7c CL |
1271 | |
1272 | if (server->nfs_client->cl_hostname == NULL) | |
1273 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
1274 | nfs_server_insert_lists(server); | |
1275 | ||
4fe6b366 | 1276 | return nfs_probe_destination(server); |
32e62b7c | 1277 | } |