Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
428360d7 BS |
2 | /* |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | */ | |
fcf10398 | 6 | #include <linux/module.h> |
428360d7 | 7 | #include <linux/nfs_fs.h> |
fcf10398 | 8 | #include <linux/nfs_mount.h> |
5976687a | 9 | #include <linux/sunrpc/addr.h> |
428360d7 BS |
10 | #include <linux/sunrpc/auth.h> |
11 | #include <linux/sunrpc/xprt.h> | |
12 | #include <linux/sunrpc/bc_xprt.h> | |
6aa23d76 | 13 | #include <linux/sunrpc/rpc_pipe_fs.h> |
428360d7 BS |
14 | #include "internal.h" |
15 | #include "callback.h" | |
fcf10398 | 16 | #include "delegation.h" |
73e39aaa | 17 | #include "nfs4session.h" |
40c64c26 | 18 | #include "nfs4idmap.h" |
fcf10398 BS |
19 | #include "pnfs.h" |
20 | #include "netns.h" | |
428360d7 BS |
21 | |
22 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
23 | ||
ec409897 BS |
24 | /* |
25 | * Get a unique NFSv4.0 callback identifier which will be used | |
26 | * by the V4.0 callback service to lookup the nfs_client struct | |
27 | */ | |
28 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
29 | { | |
30 | int ret = 0; | |
31 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
32 | ||
33 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
34 | return ret; | |
d6870312 | 35 | idr_preload(GFP_KERNEL); |
ec409897 | 36 | spin_lock(&nn->nfs_client_lock); |
c68a027c | 37 | ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); |
d6870312 TH |
38 | if (ret >= 0) |
39 | clp->cl_cb_ident = ret; | |
ec409897 | 40 | spin_unlock(&nn->nfs_client_lock); |
d6870312 TH |
41 | idr_preload_end(); |
42 | return ret < 0 ? ret : 0; | |
ec409897 BS |
43 | } |
44 | ||
45 | #ifdef CONFIG_NFS_V4_1 | |
302fad7b | 46 | /* |
0e20162e AA |
47 | * Per auth flavor data server rpc clients |
48 | */ | |
49 | struct nfs4_ds_server { | |
50 | struct list_head list; /* ds_clp->cl_ds_clients */ | |
51 | struct rpc_clnt *rpc_clnt; | |
52 | }; | |
53 | ||
54 | /** | |
302fad7b TM |
55 | * nfs4_find_ds_client - Common lookup case for DS I/O |
56 | * @ds_clp: pointer to the DS's nfs_client | |
57 | * @flavor: rpc auth flavour to match | |
0e20162e AA |
58 | */ |
59 | static struct nfs4_ds_server * | |
60 | nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
61 | { | |
62 | struct nfs4_ds_server *dss; | |
63 | ||
64 | rcu_read_lock(); | |
65 | list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { | |
66 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
67 | continue; | |
68 | goto out; | |
69 | } | |
70 | dss = NULL; | |
71 | out: | |
72 | rcu_read_unlock(); | |
73 | return dss; | |
74 | } | |
75 | ||
76 | static struct nfs4_ds_server * | |
77 | nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, | |
78 | struct nfs4_ds_server *new) | |
79 | { | |
80 | struct nfs4_ds_server *dss; | |
81 | ||
82 | spin_lock(&ds_clp->cl_lock); | |
83 | list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { | |
84 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
85 | continue; | |
86 | goto out; | |
87 | } | |
88 | if (new) | |
89 | list_add_rcu(&new->list, &ds_clp->cl_ds_clients); | |
90 | dss = new; | |
91 | out: | |
92 | spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ | |
93 | return dss; | |
94 | } | |
95 | ||
96 | static struct nfs4_ds_server * | |
97 | nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
98 | { | |
99 | struct nfs4_ds_server *dss; | |
100 | ||
101 | dss = kmalloc(sizeof(*dss), GFP_NOFS); | |
102 | if (dss == NULL) | |
103 | return ERR_PTR(-ENOMEM); | |
104 | ||
105 | dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); | |
106 | if (IS_ERR(dss->rpc_clnt)) { | |
107 | int err = PTR_ERR(dss->rpc_clnt); | |
108 | kfree (dss); | |
109 | return ERR_PTR(err); | |
110 | } | |
111 | INIT_LIST_HEAD(&dss->list); | |
112 | ||
113 | return dss; | |
114 | } | |
115 | ||
116 | static void | |
117 | nfs4_free_ds_server(struct nfs4_ds_server *dss) | |
118 | { | |
119 | rpc_release_client(dss->rpc_clnt); | |
120 | kfree(dss); | |
121 | } | |
122 | ||
123 | /** | |
302fad7b TM |
124 | * nfs4_find_or_create_ds_client - Find or create a DS rpc client |
125 | * @ds_clp: pointer to the DS's nfs_client | |
126 | * @inode: pointer to the inode | |
127 | * | |
128 | * Find or create a DS rpc client with th MDS server rpc client auth flavor | |
129 | * in the nfs_client cl_ds_clients list. | |
130 | */ | |
0e20162e AA |
131 | struct rpc_clnt * |
132 | nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) | |
133 | { | |
134 | struct nfs4_ds_server *dss, *new; | |
135 | rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; | |
136 | ||
137 | dss = nfs4_find_ds_client(ds_clp, flavor); | |
138 | if (dss != NULL) | |
139 | goto out; | |
140 | new = nfs4_alloc_ds_server(ds_clp, flavor); | |
141 | if (IS_ERR(new)) | |
142 | return ERR_CAST(new); | |
143 | dss = nfs4_add_ds_client(ds_clp, flavor, new); | |
144 | if (dss != new) | |
145 | nfs4_free_ds_server(new); | |
146 | out: | |
147 | return dss->rpc_clnt; | |
148 | } | |
149 | EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); | |
150 | ||
151 | static void | |
152 | nfs4_shutdown_ds_clients(struct nfs_client *clp) | |
153 | { | |
154 | struct nfs4_ds_server *dss; | |
0e20162e AA |
155 | |
156 | while (!list_empty(&clp->cl_ds_clients)) { | |
157 | dss = list_entry(clp->cl_ds_clients.next, | |
158 | struct nfs4_ds_server, list); | |
159 | list_del(&dss->list); | |
160 | rpc_shutdown_client(dss->rpc_clnt); | |
161 | kfree (dss); | |
162 | } | |
163 | } | |
164 | ||
bc0c9079 OK |
165 | static void |
166 | nfs4_cleanup_callback(struct nfs_client *clp) | |
167 | { | |
168 | struct nfs4_copy_state *cp_state; | |
169 | ||
170 | while (!list_empty(&clp->pending_cb_stateids)) { | |
171 | cp_state = list_entry(clp->pending_cb_stateids.next, | |
172 | struct nfs4_copy_state, copies); | |
173 | list_del(&cp_state->copies); | |
174 | kfree(cp_state); | |
175 | } | |
176 | } | |
177 | ||
abf79bb3 | 178 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
179 | { |
180 | if (nfs4_has_session(clp)) { | |
bc0c9079 | 181 | nfs4_cleanup_callback(clp); |
0e20162e | 182 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
183 | nfs4_destroy_session(clp->cl_session); |
184 | nfs4_destroy_clientid(clp); | |
185 | } | |
186 | ||
187 | } | |
abf79bb3 CL |
188 | #endif /* CONFIG_NFS_V4_1 */ |
189 | ||
190 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 191 | { |
abf79bb3 | 192 | if (clp->cl_slot_tbl) { |
20b9a902 | 193 | nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
abf79bb3 CL |
194 | kfree(clp->cl_slot_tbl); |
195 | } | |
ec409897 | 196 | } |
ec409897 BS |
197 | |
198 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
199 | { | |
200 | int err; | |
201 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
202 | if (IS_ERR(clp)) | |
203 | return clp; | |
204 | ||
205 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
206 | if (err) | |
207 | goto error; | |
208 | ||
42c2c424 SD |
209 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
210 | err = -EINVAL; | |
211 | goto error; | |
212 | } | |
213 | ||
ec409897 BS |
214 | spin_lock_init(&clp->cl_lock); |
215 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 216 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
217 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
218 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
219 | clp->cl_minorversion = cl_init->minorversion; | |
220 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
c9fdeb28 | 221 | clp->cl_mig_gen = 1; |
a1d617d8 JL |
222 | #if IS_ENABLED(CONFIG_NFS_V4_1) |
223 | init_waitqueue_head(&clp->cl_lock_waitq); | |
224 | #endif | |
bc0c9079 | 225 | INIT_LIST_HEAD(&clp->pending_cb_stateids); |
ec409897 BS |
226 | return clp; |
227 | ||
228 | error: | |
7653f6ff | 229 | nfs_free_client(clp); |
ec409897 BS |
230 | return ERR_PTR(err); |
231 | } | |
232 | ||
233 | /* | |
234 | * Destroy the NFS4 callback service | |
235 | */ | |
236 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
237 | { | |
238 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 239 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
240 | } |
241 | ||
242 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
243 | { | |
244 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
245 | nfs4_kill_renewd(clp); | |
abf79bb3 | 246 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
247 | nfs4_destroy_callback(clp); |
248 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
249 | nfs_idmap_delete(clp); | |
250 | ||
251 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
252 | kfree(clp->cl_serverowner); | |
253 | kfree(clp->cl_serverscope); | |
254 | kfree(clp->cl_implid); | |
ceb3a16c | 255 | kfree(clp->cl_owner_id); |
ec409897 BS |
256 | } |
257 | ||
258 | void nfs4_free_client(struct nfs_client *clp) | |
259 | { | |
260 | nfs4_shutdown_client(clp); | |
261 | nfs_free_client(clp); | |
262 | } | |
263 | ||
428360d7 BS |
264 | /* |
265 | * Initialize the NFS4 callback service | |
266 | */ | |
267 | static int nfs4_init_callback(struct nfs_client *clp) | |
268 | { | |
c2ef47b7 | 269 | struct rpc_xprt *xprt; |
428360d7 BS |
270 | int error; |
271 | ||
c2ef47b7 | 272 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
428360d7 | 273 | |
c2ef47b7 CL |
274 | if (nfs4_has_session(clp)) { |
275 | error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
276 | if (error < 0) | |
428360d7 | 277 | return error; |
428360d7 | 278 | } |
c2ef47b7 CL |
279 | |
280 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
281 | if (error < 0) { | |
282 | dprintk("%s: failed to start callback. Error = %d\n", | |
283 | __func__, error); | |
284 | return error; | |
285 | } | |
286 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
287 | ||
428360d7 BS |
288 | return 0; |
289 | } | |
290 | ||
abf79bb3 CL |
291 | /** |
292 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
302fad7b | 293 | * @clp: nfs_client to initialize |
abf79bb3 CL |
294 | * |
295 | * Returns zero on success, or a negative errno if some error occurred. | |
296 | */ | |
297 | int nfs40_init_client(struct nfs_client *clp) | |
298 | { | |
299 | struct nfs4_slot_table *tbl; | |
300 | int ret; | |
301 | ||
302 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
303 | if (tbl == NULL) | |
304 | return -ENOMEM; | |
305 | ||
306 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
307 | "NFSv4.0 transport Slot table"); | |
308 | if (ret) { | |
309 | kfree(tbl); | |
310 | return ret; | |
311 | } | |
312 | ||
313 | clp->cl_slot_tbl = tbl; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | #if defined(CONFIG_NFS_V4_1) | |
318 | ||
319 | /** | |
320 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
302fad7b | 321 | * @clp: nfs_client to initialize |
abf79bb3 CL |
322 | * |
323 | * Returns zero on success, or a negative errno if some error occurred. | |
324 | */ | |
325 | int nfs41_init_client(struct nfs_client *clp) | |
326 | { | |
327 | struct nfs4_session *session = NULL; | |
328 | ||
329 | /* | |
330 | * Create the session and mark it expired. | |
331 | * When a SEQUENCE operation encounters the expired session | |
332 | * it will do session recovery to initialize it. | |
333 | */ | |
334 | session = nfs4_alloc_session(clp); | |
335 | if (!session) | |
336 | return -ENOMEM; | |
337 | ||
338 | clp->cl_session = session; | |
339 | ||
340 | /* | |
341 | * The create session reply races with the server back | |
342 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
343 | * so that the client back channel can find the | |
344 | * nfs_client struct | |
345 | */ | |
346 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | #endif /* CONFIG_NFS_V4_1 */ | |
351 | ||
428360d7 BS |
352 | /* |
353 | * Initialize the minor version specific parts of an NFS4 client record | |
354 | */ | |
355 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
356 | { | |
abf79bb3 | 357 | int ret; |
428360d7 | 358 | |
abf79bb3 CL |
359 | ret = clp->cl_mvops->init_client(clp); |
360 | if (ret) | |
361 | return ret; | |
428360d7 BS |
362 | return nfs4_init_callback(clp); |
363 | } | |
364 | ||
365 | /** | |
366 | * nfs4_init_client - Initialise an NFS4 client record | |
367 | * | |
368 | * @clp: nfs_client to initialise | |
302fad7b | 369 | * @cl_init: pointer to nfs_client_initdata |
428360d7 BS |
370 | * |
371 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
372 | */ | |
373 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
5c6e5b60 | 374 | const struct nfs_client_initdata *cl_init) |
428360d7 BS |
375 | { |
376 | char buf[INET6_ADDRSTRLEN + 1]; | |
5c6e5b60 | 377 | const char *ip_addr = cl_init->ip_addr; |
05f4c350 | 378 | struct nfs_client *old; |
428360d7 BS |
379 | int error; |
380 | ||
4fe6b366 | 381 | if (clp->cl_cons_state == NFS_CS_READY) |
428360d7 | 382 | /* the client is initialised already */ |
428360d7 | 383 | return clp; |
428360d7 BS |
384 | |
385 | /* Check NFS protocol revision and initialize RPC op vector */ | |
386 | clp->rpc_ops = &nfs_v4_clientops; | |
387 | ||
98f98cf5 TM |
388 | if (clp->cl_minorversion != 0) |
389 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
428360d7 | 390 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
99875249 | 391 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
6aa23d76 | 392 | |
5c6e5b60 | 393 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); |
23631227 | 394 | if (error == -EINVAL) |
5c6e5b60 | 395 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
428360d7 BS |
396 | if (error < 0) |
397 | goto error; | |
398 | ||
399 | /* If no clientaddr= option was specified, find a usable cb address */ | |
400 | if (ip_addr == NULL) { | |
401 | struct sockaddr_storage cb_addr; | |
402 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
403 | ||
404 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
405 | if (error < 0) | |
406 | goto error; | |
407 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
408 | if (error < 0) | |
409 | goto error; | |
410 | ip_addr = (const char *)buf; | |
411 | } | |
412 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
413 | ||
414 | error = nfs_idmap_new(clp); | |
415 | if (error < 0) { | |
416 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
417 | __func__, error); | |
418 | goto error; | |
419 | } | |
420 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
421 | ||
422 | error = nfs4_init_client_minor_version(clp); | |
423 | if (error < 0) | |
424 | goto error; | |
425 | ||
05f4c350 CL |
426 | error = nfs4_discover_server_trunking(clp, &old); |
427 | if (error < 0) | |
428 | goto error; | |
05f4c350 | 429 | |
c156618e | 430 | if (clp != old) { |
abad2fa5 | 431 | clp->cl_preserve_clid = true; |
c156618e SM |
432 | /* |
433 | * Mark the client as having failed initialization so other | |
434 | * processes walking the nfs_client_list in nfs_match_client() | |
435 | * won't try to use it. | |
436 | */ | |
437 | nfs_mark_client_ready(clp, -EPERM); | |
438 | } | |
abad2fa5 | 439 | nfs_put_client(clp); |
8dcbec6d | 440 | clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
abad2fa5 | 441 | return old; |
428360d7 BS |
442 | |
443 | error: | |
444 | nfs_mark_client_ready(clp, error); | |
445 | nfs_put_client(clp); | |
428360d7 BS |
446 | return ERR_PTR(error); |
447 | } | |
fcf10398 | 448 | |
05f4c350 CL |
449 | /* |
450 | * SETCLIENTID just did a callback update with the callback ident in | |
451 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
452 | * actually the same server. Swap the callback IDs so that "keep" | |
453 | * will continue to use the callback ident the server now knows about, | |
454 | * and so that "keep"'s original callback ident is destroyed when | |
455 | * "drop" is freed. | |
456 | */ | |
457 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
458 | struct nfs_client *drop) | |
459 | { | |
460 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
461 | unsigned int save = keep->cl_cb_ident; | |
462 | ||
463 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
464 | return; | |
465 | ||
466 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
467 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
468 | ||
469 | spin_lock(&nn->nfs_client_lock); | |
470 | ||
471 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
472 | keep->cl_cb_ident = drop->cl_cb_ident; | |
473 | ||
474 | idr_replace(&nn->cb_ident_idr, drop, save); | |
475 | drop->cl_cb_ident = save; | |
476 | ||
477 | spin_unlock(&nn->nfs_client_lock); | |
478 | } | |
479 | ||
55b9df93 TM |
480 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
481 | const struct nfs_client *clp2) | |
482 | { | |
483 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
484 | return true; | |
485 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
486 | } | |
487 | ||
ced85a75 BF |
488 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
489 | { | |
490 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
491 | } | |
492 | ||
14d1bbb0 AS |
493 | static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
494 | struct nfs_client **prev, struct nfs_net *nn) | |
495 | { | |
496 | int status; | |
497 | ||
498 | if (pos->rpc_ops != new->rpc_ops) | |
499 | return 1; | |
500 | ||
501 | if (pos->cl_minorversion != new->cl_minorversion) | |
502 | return 1; | |
503 | ||
504 | /* If "pos" isn't marked ready, we can't trust the | |
505 | * remaining fields in "pos", especially the client | |
506 | * ID and serverowner fields. Wait for CREATE_SESSION | |
507 | * to finish. */ | |
508 | if (pos->cl_cons_state > NFS_CS_READY) { | |
212bf41d | 509 | refcount_inc(&pos->cl_count); |
14d1bbb0 AS |
510 | spin_unlock(&nn->nfs_client_lock); |
511 | ||
512 | nfs_put_client(*prev); | |
513 | *prev = pos; | |
514 | ||
515 | status = nfs_wait_client_init_complete(pos); | |
516 | spin_lock(&nn->nfs_client_lock); | |
517 | ||
518 | if (status < 0) | |
519 | return status; | |
520 | } | |
521 | ||
522 | if (pos->cl_cons_state != NFS_CS_READY) | |
523 | return 1; | |
524 | ||
525 | if (pos->cl_clientid != new->cl_clientid) | |
526 | return 1; | |
527 | ||
528 | /* NFSv4.1 always uses the uniform string, however someone | |
529 | * might switch the uniquifier string on us. | |
530 | */ | |
531 | if (!nfs4_match_client_owner_id(pos, new)) | |
532 | return 1; | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
05f4c350 CL |
537 | /** |
538 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
539 | * | |
540 | * @new: nfs_client with client ID to test | |
541 | * @result: OUT: found nfs_client, or new | |
542 | * @cred: credential to use for trunking test | |
543 | * | |
544 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
545 | * If zero is returned, an nfs_client pointer is planted in "result." | |
546 | * | |
547 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
548 | * the last nfs_client on the list. | |
549 | */ | |
550 | int nfs40_walk_client_list(struct nfs_client *new, | |
551 | struct nfs_client **result, | |
a52458b4 | 552 | const struct cred *cred) |
05f4c350 CL |
553 | { |
554 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 555 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
556 | struct nfs4_setclientid_res clid = { |
557 | .clientid = new->cl_clientid, | |
558 | .confirm = new->cl_confirm, | |
559 | }; | |
4ae19c2d | 560 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
561 | |
562 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 563 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 564 | |
c156618e SM |
565 | if (pos == new) |
566 | goto found; | |
567 | ||
14d1bbb0 AS |
568 | status = nfs4_match_client(pos, new, &prev, nn); |
569 | if (status < 0) | |
570 | goto out_unlock; | |
571 | if (status != 0) | |
55b9df93 | 572 | continue; |
ced85a75 BF |
573 | /* |
574 | * We just sent a new SETCLIENTID, which should have | |
575 | * caused the server to return a new cl_confirm. So if | |
576 | * cl_confirm is the same, then this is a different | |
577 | * server that just returned the same cl_confirm by | |
578 | * coincidence: | |
579 | */ | |
580 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
581 | &new->cl_confirm)) | |
582 | continue; | |
583 | /* | |
584 | * But if the cl_confirm's are different, then the only | |
585 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
586 | * if new and pos point to the same server: | |
587 | */ | |
c156618e | 588 | found: |
212bf41d | 589 | refcount_inc(&pos->cl_count); |
05f4c350 CL |
590 | spin_unlock(&nn->nfs_client_lock); |
591 | ||
fe0bf118 | 592 | nfs_put_client(prev); |
4ae19c2d | 593 | prev = pos; |
05f4c350 CL |
594 | |
595 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
596 | switch (status) { |
597 | case -NFS4ERR_STALE_CLIENTID: | |
598 | break; | |
599 | case 0: | |
05f4c350 | 600 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 601 | pos->cl_confirm = new->cl_confirm; |
c156618e | 602 | nfs_mark_client_ready(pos, NFS_CS_READY); |
05f4c350 | 603 | |
4ae19c2d | 604 | prev = NULL; |
05f4c350 | 605 | *result = pos; |
f9b7ebdf TM |
606 | goto out; |
607 | case -ERESTARTSYS: | |
608 | case -ETIMEDOUT: | |
609 | /* The callback path may have been inadvertently | |
610 | * changed. Schedule recovery! | |
611 | */ | |
612 | nfs4_schedule_path_down_recovery(pos); | |
4ae19c2d TM |
613 | default: |
614 | goto out; | |
05f4c350 CL |
615 | } |
616 | ||
617 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 618 | } |
14d1bbb0 | 619 | out_unlock: |
4ae19c2d | 620 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 621 | |
202c312d | 622 | /* No match found. The server lost our clientid */ |
4ae19c2d | 623 | out: |
fe0bf118 | 624 | nfs_put_client(prev); |
4ae19c2d | 625 | return status; |
05f4c350 CL |
626 | } |
627 | ||
628 | #ifdef CONFIG_NFS_V4_1 | |
629 | /* | |
1fc0703a | 630 | * Returns true if the server major ids match |
05f4c350 CL |
631 | */ |
632 | static bool | |
e7b7cbf6 AA |
633 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
634 | struct nfs41_server_owner *o2) | |
05f4c350 | 635 | { |
05f4c350 | 636 | if (o1->major_id_sz != o2->major_id_sz) |
ddfa0d48 AS |
637 | return false; |
638 | return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; | |
05f4c350 CL |
639 | } |
640 | ||
ba84db96 AA |
641 | /* |
642 | * Returns true if the server scopes match | |
643 | */ | |
644 | static bool | |
645 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
646 | struct nfs41_server_scope *s2) | |
647 | { | |
648 | if (s1->server_scope_sz != s2->server_scope_sz) | |
8da0f934 AS |
649 | return false; |
650 | return memcmp(s1->server_scope, s2->server_scope, | |
651 | s1->server_scope_sz) == 0; | |
ba84db96 AA |
652 | } |
653 | ||
654 | /** | |
ad0849a7 | 655 | * nfs4_detect_session_trunking - Checks for session trunking. |
ba84db96 AA |
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 | |
302fad7b TM |
659 | * @xprt: pointer to the transport to add. |
660 | * | |
661 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
662 | * Upon success, add the transport. | |
ba84db96 AA |
663 | * |
664 | * Returns zero on success, otherwise -EINVAL | |
665 | * | |
666 | * Note: since the exchange_id for the new multi_addr transport uses the | |
667 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
668 | * so eir_clientowner is the same. | |
669 | */ | |
670 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
671 | struct nfs41_exchange_id_res *res, | |
672 | struct rpc_xprt *xprt) | |
673 | { | |
674 | /* Check eir_clientid */ | |
f251fd9e | 675 | if (clp->cl_clientid != res->clientid) |
ba84db96 AA |
676 | goto out_err; |
677 | ||
678 | /* Check eir_server_owner so_major_id */ | |
679 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
680 | res->server_owner)) | |
681 | goto out_err; | |
682 | ||
683 | /* Check eir_server_owner so_minor_id */ | |
5b6d3ff6 | 684 | if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
ba84db96 AA |
685 | goto out_err; |
686 | ||
687 | /* Check eir_server_scope */ | |
688 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
689 | goto out_err; | |
690 | ||
691 | pr_info("NFS: %s: Session trunking succeeded for %s\n", | |
692 | clp->cl_hostname, | |
693 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
694 | ||
695 | return 0; | |
696 | out_err: | |
697 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
698 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
699 | ||
700 | return -EINVAL; | |
701 | } | |
702 | ||
05f4c350 CL |
703 | /** |
704 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
705 | * | |
706 | * @new: nfs_client with client ID to test | |
707 | * @result: OUT: found nfs_client, or new | |
708 | * @cred: credential to use for trunking test | |
709 | * | |
710 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
711 | * If zero is returned, an nfs_client pointer is planted in "result." | |
712 | * | |
713 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
714 | * the last nfs_client on the list. | |
715 | */ | |
716 | int nfs41_walk_client_list(struct nfs_client *new, | |
717 | struct nfs_client **result, | |
a52458b4 | 718 | const struct cred *cred) |
05f4c350 CL |
719 | { |
720 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 721 | struct nfs_client *pos, *prev = NULL; |
202c312d | 722 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
723 | |
724 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 725 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 726 | |
48d66b97 TM |
727 | if (pos == new) |
728 | goto found; | |
729 | ||
14d1bbb0 AS |
730 | status = nfs4_match_client(pos, new, &prev, nn); |
731 | if (status < 0) | |
732 | goto out; | |
733 | if (status != 0) | |
05f4c350 CL |
734 | continue; |
735 | ||
1fc0703a TM |
736 | /* |
737 | * Note that session trunking is just a special subcase of | |
738 | * client id trunking. In either case, we want to fall back | |
739 | * to using the existing nfs_client. | |
740 | */ | |
e7b7cbf6 AA |
741 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
742 | new->cl_serverowner)) | |
05f4c350 CL |
743 | continue; |
744 | ||
48d66b97 | 745 | found: |
212bf41d | 746 | refcount_inc(&pos->cl_count); |
7b1f1fd1 | 747 | *result = pos; |
eb04e0ac | 748 | status = 0; |
7b1f1fd1 | 749 | break; |
05f4c350 CL |
750 | } |
751 | ||
14d1bbb0 | 752 | out: |
05f4c350 | 753 | spin_unlock(&nn->nfs_client_lock); |
fe0bf118 | 754 | nfs_put_client(prev); |
202c312d | 755 | return status; |
05f4c350 CL |
756 | } |
757 | #endif /* CONFIG_NFS_V4_1 */ | |
758 | ||
fcf10398 BS |
759 | static void nfs4_destroy_server(struct nfs_server *server) |
760 | { | |
c77e2283 TM |
761 | LIST_HEAD(freeme); |
762 | ||
fcf10398 BS |
763 | nfs_server_return_all_delegations(server); |
764 | unset_pnfs_layoutdriver(server); | |
c77e2283 TM |
765 | nfs4_purge_state_owners(server, &freeme); |
766 | nfs4_free_state_owners(&freeme); | |
fcf10398 BS |
767 | } |
768 | ||
769 | /* | |
770 | * NFSv4.0 callback thread helper | |
771 | * | |
772 | * Find a client by callback identifier | |
773 | */ | |
774 | struct nfs_client * | |
775 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
776 | { | |
777 | struct nfs_client *clp; | |
778 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
779 | ||
780 | spin_lock(&nn->nfs_client_lock); | |
781 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
782 | if (clp) | |
212bf41d | 783 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
784 | spin_unlock(&nn->nfs_client_lock); |
785 | return clp; | |
786 | } | |
787 | ||
788 | #if defined(CONFIG_NFS_V4_1) | |
789 | /* Common match routine for v4.0 and v4.1 callback services */ | |
790 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
791 | struct nfs_client *clp, u32 minorversion) | |
792 | { | |
793 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
794 | ||
795 | /* Don't match clients that failed to initialise */ | |
796 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
797 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
798 | return false; | |
799 | ||
800 | smp_rmb(); | |
801 | ||
802 | /* Match the version and minorversion */ | |
803 | if (clp->rpc_ops->version != 4 || | |
804 | clp->cl_minorversion != minorversion) | |
805 | return false; | |
806 | ||
807 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 808 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
809 | } |
810 | ||
811 | /* | |
812 | * NFSv4.1 callback thread helper | |
813 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
814 | * minorversion, and sessionID | |
815 | * | |
816 | * Returns NULL if no such client | |
817 | */ | |
818 | struct nfs_client * | |
819 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 820 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
821 | { |
822 | struct nfs_client *clp; | |
823 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
824 | ||
825 | spin_lock(&nn->nfs_client_lock); | |
826 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
6089dd0d | 827 | if (!nfs4_cb_match_client(addr, clp, minorversion)) |
fcf10398 BS |
828 | continue; |
829 | ||
830 | if (!nfs4_has_session(clp)) | |
831 | continue; | |
832 | ||
833 | /* Match sessionid*/ | |
834 | if (memcmp(clp->cl_session->sess_id.data, | |
835 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
836 | continue; | |
837 | ||
212bf41d | 838 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
839 | spin_unlock(&nn->nfs_client_lock); |
840 | return clp; | |
841 | } | |
842 | spin_unlock(&nn->nfs_client_lock); | |
843 | return NULL; | |
844 | } | |
845 | ||
846 | #else /* CONFIG_NFS_V4_1 */ | |
847 | ||
848 | struct nfs_client * | |
849 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 850 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
851 | { |
852 | return NULL; | |
853 | } | |
854 | #endif /* CONFIG_NFS_V4_1 */ | |
855 | ||
856 | /* | |
857 | * Set up an NFS4 client | |
858 | */ | |
859 | static int nfs4_set_client(struct nfs_server *server, | |
860 | const char *hostname, | |
861 | const struct sockaddr *addr, | |
862 | const size_t addrlen, | |
863 | const char *ip_addr, | |
fcf10398 | 864 | int proto, const struct rpc_timeout *timeparms, |
6619079d TM |
865 | u32 minorversion, unsigned int nconnect, |
866 | struct net *net) | |
fcf10398 BS |
867 | { |
868 | struct nfs_client_initdata cl_init = { | |
869 | .hostname = hostname, | |
870 | .addr = addr, | |
871 | .addrlen = addrlen, | |
5c6e5b60 | 872 | .ip_addr = ip_addr, |
ab7017a3 | 873 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
874 | .proto = proto, |
875 | .minorversion = minorversion, | |
876 | .net = net, | |
5c6e5b60 | 877 | .timeparms = timeparms, |
1a58e8a0 | 878 | .cred = server->cred, |
fcf10398 BS |
879 | }; |
880 | struct nfs_client *clp; | |
fcf10398 | 881 | |
6619079d TM |
882 | if (minorversion > 0 && proto == XPRT_TRANSPORT_TCP) |
883 | cl_init.nconnect = nconnect; | |
fcf10398 BS |
884 | if (server->flags & NFS_MOUNT_NORESVPORT) |
885 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
f112bb48 CL |
886 | if (server->options & NFS_OPTION_MIGRATION) |
887 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
8dcbec6d CL |
888 | if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
889 | set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); | |
801b5643 | 890 | server->port = rpc_get_port(addr); |
fcf10398 BS |
891 | |
892 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 893 | clp = nfs_get_client(&cl_init); |
2dc42c0d AS |
894 | if (IS_ERR(clp)) |
895 | return PTR_ERR(clp); | |
fcf10398 | 896 | |
ad86f605 BB |
897 | if (server->nfs_client == clp) { |
898 | nfs_put_client(clp); | |
2dc42c0d | 899 | return -ELOOP; |
ad86f605 | 900 | } |
52442f9b | 901 | |
fcf10398 BS |
902 | /* |
903 | * Query for the lease time on clientid setup or renewal | |
904 | * | |
905 | * Note that this will be set on nfs_clients that were created | |
906 | * only for the DS role and did not set this bit, but now will | |
907 | * serve a dual role. | |
908 | */ | |
909 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
910 | ||
911 | server->nfs_client = clp; | |
fcf10398 | 912 | return 0; |
fcf10398 BS |
913 | } |
914 | ||
915 | /* | |
916 | * Set up a pNFS Data Server client. | |
917 | * | |
918 | * Return any existing nfs_client that matches server address,port,version | |
919 | * and minorversion. | |
920 | * | |
921 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
922 | * low timeout interval so that if a connection is lost, we retry through | |
923 | * the MDS. | |
924 | */ | |
3fc75f12 | 925 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
fcf10398 | 926 | const struct sockaddr *ds_addr, int ds_addrlen, |
064172f3 | 927 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 928 | u32 minor_version) |
fcf10398 | 929 | { |
5c6e5b60 | 930 | struct rpc_timeout ds_timeout; |
3fc75f12 | 931 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
932 | struct nfs_client_initdata cl_init = { |
933 | .addr = ds_addr, | |
934 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
935 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
936 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 937 | .nfs_mod = &nfs_v4, |
fcf10398 | 938 | .proto = ds_proto, |
30626f9c | 939 | .minorversion = minor_version, |
fcf10398 | 940 | .net = mds_clp->cl_net, |
5c6e5b60 | 941 | .timeparms = &ds_timeout, |
1a58e8a0 | 942 | .cred = mds_srv->cred, |
fcf10398 | 943 | }; |
a363e32e PT |
944 | char buf[INET6_ADDRSTRLEN + 1]; |
945 | ||
946 | if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0) | |
947 | return ERR_PTR(-EINVAL); | |
948 | cl_init.hostname = buf; | |
fcf10398 | 949 | |
bb71e4a5 TM |
950 | if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP) |
951 | cl_init.nconnect = mds_clp->cl_nconnect; | |
952 | ||
3fc75f12 TM |
953 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
954 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
955 | ||
fcf10398 BS |
956 | /* |
957 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
958 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
959 | * (section 13.1 RFC 5661). | |
960 | */ | |
961 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
4fe6b366 | 962 | return nfs_get_client(&cl_init); |
fcf10398 BS |
963 | } |
964 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
965 | ||
966 | /* | |
967 | * Session has been established, and the client marked ready. | |
943cff67 TM |
968 | * Limit the mount rsize, wsize and dtsize using negotiated fore |
969 | * channel attributes. | |
fcf10398 | 970 | */ |
943cff67 | 971 | static void nfs4_session_limit_rwsize(struct nfs_server *server) |
fcf10398 BS |
972 | { |
973 | #ifdef CONFIG_NFS_V4_1 | |
974 | struct nfs4_session *sess; | |
975 | u32 server_resp_sz; | |
976 | u32 server_rqst_sz; | |
977 | ||
978 | if (!nfs4_has_session(server->nfs_client)) | |
979 | return; | |
980 | sess = server->nfs_client->cl_session; | |
981 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
982 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
983 | ||
943cff67 TM |
984 | if (server->dtsize > server_resp_sz) |
985 | server->dtsize = server_resp_sz; | |
986 | if (server->rsize > server_resp_sz) | |
fcf10398 | 987 | server->rsize = server_resp_sz; |
943cff67 | 988 | if (server->wsize > server_rqst_sz) |
fcf10398 BS |
989 | server->wsize = server_rqst_sz; |
990 | #endif /* CONFIG_NFS_V4_1 */ | |
991 | } | |
992 | ||
993 | static int nfs4_server_common_setup(struct nfs_server *server, | |
5e6b1990 | 994 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 BS |
995 | { |
996 | struct nfs_fattr *fattr; | |
997 | int error; | |
998 | ||
fcf10398 BS |
999 | /* data servers support only a subset of NFSv4.1 */ |
1000 | if (is_ds_only_client(server->nfs_client)) | |
1001 | return -EPROTONOSUPPORT; | |
1002 | ||
1003 | fattr = nfs_alloc_fattr(); | |
1004 | if (fattr == NULL) | |
1005 | return -ENOMEM; | |
1006 | ||
1007 | /* We must ensure the session is initialised first */ | |
18aad3d5 | 1008 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
1009 | if (error < 0) |
1010 | goto out; | |
1011 | ||
39c6daae TM |
1012 | /* Set the basic capabilities */ |
1013 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
1014 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
1015 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
1016 | /* | |
1017 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1018 | * authentication. | |
1019 | */ | |
1020 | if (nfs4_disable_idmapping && | |
1021 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
1022 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1023 | ||
1024 | ||
fcf10398 | 1025 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 1026 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
1027 | if (error < 0) |
1028 | goto out; | |
1029 | ||
1030 | dprintk("Server FSID: %llx:%llx\n", | |
1031 | (unsigned long long) server->fsid.major, | |
1032 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 1033 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 | 1034 | |
fcf10398 BS |
1035 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
1036 | if (error < 0) | |
1037 | goto out; | |
1038 | ||
943cff67 TM |
1039 | nfs4_session_limit_rwsize(server); |
1040 | ||
fcf10398 BS |
1041 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1042 | server->namelen = NFS4_MAXNAMLEN; | |
1043 | ||
1044 | nfs_server_insert_lists(server); | |
1045 | server->mount_time = jiffies; | |
1046 | server->destroy = nfs4_destroy_server; | |
1047 | out: | |
1048 | nfs_free_fattr(fattr); | |
1049 | return error; | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * Create a version 4 volume record | |
1054 | */ | |
1055 | static int nfs4_init_server(struct nfs_server *server, | |
a3f73c27 | 1056 | struct nfs_parsed_mount_data *data) |
fcf10398 BS |
1057 | { |
1058 | struct rpc_timeout timeparms; | |
1059 | int error; | |
1060 | ||
fcf10398 BS |
1061 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1062 | data->timeo, data->retrans); | |
1063 | ||
1064 | /* Initialise the client representation from the mount data */ | |
1065 | server->flags = data->flags; | |
fcf10398 | 1066 | server->options = data->options; |
0f5f49b8 | 1067 | server->auth_info = data->auth_info; |
fcf10398 | 1068 | |
4d4b69dd WAA |
1069 | /* Use the first specified auth flavor. If this flavor isn't |
1070 | * allowed by the server, use the SECINFO path to try the | |
1071 | * other specified flavors */ | |
a3f73c27 WAA |
1072 | if (data->auth_info.flavor_len >= 1) |
1073 | data->selected_flavor = data->auth_info.flavors[0]; | |
1074 | else | |
1075 | data->selected_flavor = RPC_AUTH_UNIX; | |
5e6b1990 | 1076 | |
fcf10398 BS |
1077 | /* Get a client record */ |
1078 | error = nfs4_set_client(server, | |
1079 | data->nfs_server.hostname, | |
1080 | (const struct sockaddr *)&data->nfs_server.address, | |
1081 | data->nfs_server.addrlen, | |
1082 | data->client_address, | |
fcf10398 BS |
1083 | data->nfs_server.protocol, |
1084 | &timeparms, | |
1085 | data->minorversion, | |
6619079d | 1086 | data->nfs_server.nconnect, |
fcf10398 BS |
1087 | data->net); |
1088 | if (error < 0) | |
1073d9b4 | 1089 | return error; |
fcf10398 | 1090 | |
fcf10398 BS |
1091 | if (data->rsize) |
1092 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1093 | if (data->wsize) | |
1094 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1095 | ||
1096 | server->acregmin = data->acregmin * HZ; | |
1097 | server->acregmax = data->acregmax * HZ; | |
1098 | server->acdirmin = data->acdirmin * HZ; | |
1099 | server->acdirmax = data->acdirmax * HZ; | |
1073d9b4 | 1100 | server->port = data->nfs_server.port; |
fcf10398 | 1101 | |
1073d9b4 AS |
1102 | return nfs_init_server_rpcclient(server, &timeparms, |
1103 | data->selected_flavor); | |
fcf10398 BS |
1104 | } |
1105 | ||
1106 | /* | |
1107 | * Create a version 4 volume record | |
1108 | * - keyed on server and FSID | |
1109 | */ | |
1179acc6 BS |
1110 | /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
1111 | struct nfs_fh *mntfh)*/ | |
1112 | struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, | |
1113 | struct nfs_subversion *nfs_mod) | |
fcf10398 BS |
1114 | { |
1115 | struct nfs_server *server; | |
5e6b1990 | 1116 | bool auth_probe; |
fcf10398 BS |
1117 | int error; |
1118 | ||
fcf10398 BS |
1119 | server = nfs_alloc_server(); |
1120 | if (!server) | |
1121 | return ERR_PTR(-ENOMEM); | |
1122 | ||
1a58e8a0 TM |
1123 | server->cred = get_cred(current_cred()); |
1124 | ||
a3f73c27 | 1125 | auth_probe = mount_info->parsed->auth_info.flavor_len < 1; |
5e6b1990 | 1126 | |
fcf10398 | 1127 | /* set up the general RPC client */ |
1179acc6 | 1128 | error = nfs4_init_server(server, mount_info->parsed); |
fcf10398 BS |
1129 | if (error < 0) |
1130 | goto error; | |
1131 | ||
5e6b1990 | 1132 | error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); |
fcf10398 BS |
1133 | if (error < 0) |
1134 | goto error; | |
1135 | ||
fcf10398 BS |
1136 | return server; |
1137 | ||
1138 | error: | |
1139 | nfs_free_server(server); | |
fcf10398 BS |
1140 | return ERR_PTR(error); |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Create an NFS4 referral server record | |
1145 | */ | |
1146 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1147 | struct nfs_fh *mntfh) | |
1148 | { | |
1149 | struct nfs_client *parent_client; | |
1150 | struct nfs_server *server, *parent_server; | |
5837f6df | 1151 | bool auth_probe; |
fcf10398 BS |
1152 | int error; |
1153 | ||
fcf10398 BS |
1154 | server = nfs_alloc_server(); |
1155 | if (!server) | |
1156 | return ERR_PTR(-ENOMEM); | |
1157 | ||
1158 | parent_server = NFS_SB(data->sb); | |
1159 | parent_client = parent_server->nfs_client; | |
1160 | ||
1a58e8a0 TM |
1161 | server->cred = get_cred(parent_server->cred); |
1162 | ||
fcf10398 BS |
1163 | /* Initialise the client representation from the parent server */ |
1164 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 | 1165 | |
530ea421 | 1166 | /* Get a client representation */ |
23a88ade | 1167 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 | 1168 | rpc_set_port(data->addr, NFS_RDMA_PORT); |
fcf10398 BS |
1169 | error = nfs4_set_client(server, data->hostname, |
1170 | data->addr, | |
1171 | data->addrlen, | |
1172 | parent_client->cl_ipaddr, | |
530ea421 CL |
1173 | XPRT_TRANSPORT_RDMA, |
1174 | parent_server->client->cl_timeout, | |
1175 | parent_client->cl_mvops->minor_version, | |
6619079d | 1176 | parent_client->cl_nconnect, |
530ea421 CL |
1177 | parent_client->cl_net); |
1178 | if (!error) | |
1179 | goto init_server; | |
23a88ade | 1180 | #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ |
530ea421 CL |
1181 | |
1182 | rpc_set_port(data->addr, NFS_PORT); | |
1183 | error = nfs4_set_client(server, data->hostname, | |
1184 | data->addr, | |
1185 | data->addrlen, | |
1186 | parent_client->cl_ipaddr, | |
1187 | XPRT_TRANSPORT_TCP, | |
fcf10398 BS |
1188 | parent_server->client->cl_timeout, |
1189 | parent_client->cl_mvops->minor_version, | |
6619079d | 1190 | parent_client->cl_nconnect, |
fcf10398 BS |
1191 | parent_client->cl_net); |
1192 | if (error < 0) | |
1193 | goto error; | |
1194 | ||
23a88ade | 1195 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 CL |
1196 | init_server: |
1197 | #endif | |
fcf10398 BS |
1198 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
1199 | if (error < 0) | |
1200 | goto error; | |
1201 | ||
5837f6df WAA |
1202 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1203 | ||
1204 | error = nfs4_server_common_setup(server, mntfh, auth_probe); | |
fcf10398 BS |
1205 | if (error < 0) |
1206 | goto error; | |
1207 | ||
fcf10398 BS |
1208 | return server; |
1209 | ||
1210 | error: | |
1211 | nfs_free_server(server); | |
fcf10398 BS |
1212 | return ERR_PTR(error); |
1213 | } | |
32e62b7c CL |
1214 | |
1215 | /* | |
1216 | * Grab the destination's particulars, including lease expiry time. | |
1217 | * | |
1218 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
1219 | * we have cached. | |
1220 | */ | |
1221 | static int nfs_probe_destination(struct nfs_server *server) | |
1222 | { | |
2b0143b5 | 1223 | struct inode *inode = d_inode(server->super->s_root); |
32e62b7c CL |
1224 | struct nfs_fattr *fattr; |
1225 | int error; | |
1226 | ||
1227 | fattr = nfs_alloc_fattr(); | |
1228 | if (fattr == NULL) | |
1229 | return -ENOMEM; | |
1230 | ||
1231 | /* Sanity: the probe won't work if the destination server | |
1232 | * does not recognize the migrated FH. */ | |
1233 | error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); | |
1234 | ||
1235 | nfs_free_fattr(fattr); | |
1236 | return error; | |
1237 | } | |
1238 | ||
1239 | /** | |
1240 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1241 | * | |
1242 | * @server: represents FSID to be moved | |
1243 | * @hostname: new end-point's hostname | |
1244 | * @sap: new end-point's socket address | |
1245 | * @salen: size of "sap" | |
292f503c | 1246 | * @net: net namespace |
32e62b7c CL |
1247 | * |
1248 | * The nfs_server must be quiescent before this function is invoked. | |
1249 | * Either its session is drained (NFSv4.1+), or its transport is | |
1250 | * plugged and drained (NFSv4.0). | |
1251 | * | |
1252 | * Returns zero on success, or a negative errno value. | |
1253 | */ | |
1254 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
292f503c | 1255 | struct sockaddr *sap, size_t salen, struct net *net) |
32e62b7c CL |
1256 | { |
1257 | struct nfs_client *clp = server->nfs_client; | |
1258 | struct rpc_clnt *clnt = server->client; | |
1259 | struct xprt_create xargs = { | |
1260 | .ident = clp->cl_proto, | |
292f503c | 1261 | .net = net, |
32e62b7c CL |
1262 | .dstaddr = sap, |
1263 | .addrlen = salen, | |
1264 | .servername = hostname, | |
1265 | }; | |
1266 | char buf[INET6_ADDRSTRLEN + 1]; | |
1267 | struct sockaddr_storage address; | |
1268 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1269 | int error; | |
1270 | ||
32e62b7c | 1271 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
4fe6b366 AS |
1272 | if (error != 0) |
1273 | return error; | |
32e62b7c CL |
1274 | |
1275 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
4fe6b366 AS |
1276 | if (error != 0) |
1277 | return error; | |
32e62b7c | 1278 | |
4fe6b366 AS |
1279 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
1280 | return -EAFNOSUPPORT; | |
32e62b7c CL |
1281 | |
1282 | nfs_server_remove_lists(server); | |
8dcbec6d | 1283 | set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c | 1284 | error = nfs4_set_client(server, hostname, sap, salen, buf, |
32e62b7c | 1285 | clp->cl_proto, clnt->cl_timeout, |
6619079d TM |
1286 | clp->cl_minorversion, |
1287 | clp->cl_nconnect, net); | |
8dcbec6d | 1288 | clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c CL |
1289 | if (error != 0) { |
1290 | nfs_server_insert_lists(server); | |
4fe6b366 | 1291 | return error; |
32e62b7c | 1292 | } |
ad86f605 | 1293 | nfs_put_client(clp); |
32e62b7c CL |
1294 | |
1295 | if (server->nfs_client->cl_hostname == NULL) | |
1296 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
1297 | nfs_server_insert_lists(server); | |
1298 | ||
4fe6b366 | 1299 | return nfs_probe_destination(server); |
32e62b7c | 1300 | } |