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" | |
1c725118 | 21 | #include "sysfs.h" |
428360d7 BS |
22 | |
23 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
24 | ||
ec409897 BS |
25 | /* |
26 | * Get a unique NFSv4.0 callback identifier which will be used | |
27 | * by the V4.0 callback service to lookup the nfs_client struct | |
28 | */ | |
29 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
30 | { | |
31 | int ret = 0; | |
32 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
33 | ||
34 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
35 | return ret; | |
d6870312 | 36 | idr_preload(GFP_KERNEL); |
ec409897 | 37 | spin_lock(&nn->nfs_client_lock); |
c68a027c | 38 | ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); |
d6870312 TH |
39 | if (ret >= 0) |
40 | clp->cl_cb_ident = ret; | |
ec409897 | 41 | spin_unlock(&nn->nfs_client_lock); |
d6870312 TH |
42 | idr_preload_end(); |
43 | return ret < 0 ? ret : 0; | |
ec409897 BS |
44 | } |
45 | ||
46 | #ifdef CONFIG_NFS_V4_1 | |
302fad7b | 47 | /* |
0e20162e AA |
48 | * Per auth flavor data server rpc clients |
49 | */ | |
50 | struct nfs4_ds_server { | |
51 | struct list_head list; /* ds_clp->cl_ds_clients */ | |
52 | struct rpc_clnt *rpc_clnt; | |
53 | }; | |
54 | ||
55 | /** | |
302fad7b TM |
56 | * nfs4_find_ds_client - Common lookup case for DS I/O |
57 | * @ds_clp: pointer to the DS's nfs_client | |
58 | * @flavor: rpc auth flavour to match | |
0e20162e AA |
59 | */ |
60 | static struct nfs4_ds_server * | |
61 | nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
62 | { | |
63 | struct nfs4_ds_server *dss; | |
64 | ||
65 | rcu_read_lock(); | |
66 | list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { | |
67 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
68 | continue; | |
69 | goto out; | |
70 | } | |
71 | dss = NULL; | |
72 | out: | |
73 | rcu_read_unlock(); | |
74 | return dss; | |
75 | } | |
76 | ||
77 | static struct nfs4_ds_server * | |
78 | nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, | |
79 | struct nfs4_ds_server *new) | |
80 | { | |
81 | struct nfs4_ds_server *dss; | |
82 | ||
83 | spin_lock(&ds_clp->cl_lock); | |
84 | list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { | |
85 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
86 | continue; | |
87 | goto out; | |
88 | } | |
89 | if (new) | |
90 | list_add_rcu(&new->list, &ds_clp->cl_ds_clients); | |
91 | dss = new; | |
92 | out: | |
93 | spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ | |
94 | return dss; | |
95 | } | |
96 | ||
97 | static struct nfs4_ds_server * | |
98 | nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
99 | { | |
100 | struct nfs4_ds_server *dss; | |
101 | ||
102 | dss = kmalloc(sizeof(*dss), GFP_NOFS); | |
103 | if (dss == NULL) | |
104 | return ERR_PTR(-ENOMEM); | |
105 | ||
106 | dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); | |
107 | if (IS_ERR(dss->rpc_clnt)) { | |
108 | int err = PTR_ERR(dss->rpc_clnt); | |
109 | kfree (dss); | |
110 | return ERR_PTR(err); | |
111 | } | |
112 | INIT_LIST_HEAD(&dss->list); | |
113 | ||
114 | return dss; | |
115 | } | |
116 | ||
117 | static void | |
118 | nfs4_free_ds_server(struct nfs4_ds_server *dss) | |
119 | { | |
120 | rpc_release_client(dss->rpc_clnt); | |
121 | kfree(dss); | |
122 | } | |
123 | ||
124 | /** | |
302fad7b TM |
125 | * nfs4_find_or_create_ds_client - Find or create a DS rpc client |
126 | * @ds_clp: pointer to the DS's nfs_client | |
127 | * @inode: pointer to the inode | |
128 | * | |
129 | * Find or create a DS rpc client with th MDS server rpc client auth flavor | |
130 | * in the nfs_client cl_ds_clients list. | |
131 | */ | |
0e20162e AA |
132 | struct rpc_clnt * |
133 | nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) | |
134 | { | |
135 | struct nfs4_ds_server *dss, *new; | |
136 | rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; | |
137 | ||
138 | dss = nfs4_find_ds_client(ds_clp, flavor); | |
139 | if (dss != NULL) | |
140 | goto out; | |
141 | new = nfs4_alloc_ds_server(ds_clp, flavor); | |
142 | if (IS_ERR(new)) | |
143 | return ERR_CAST(new); | |
144 | dss = nfs4_add_ds_client(ds_clp, flavor, new); | |
145 | if (dss != new) | |
146 | nfs4_free_ds_server(new); | |
147 | out: | |
148 | return dss->rpc_clnt; | |
149 | } | |
150 | EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); | |
151 | ||
152 | static void | |
153 | nfs4_shutdown_ds_clients(struct nfs_client *clp) | |
154 | { | |
155 | struct nfs4_ds_server *dss; | |
0e20162e AA |
156 | |
157 | while (!list_empty(&clp->cl_ds_clients)) { | |
158 | dss = list_entry(clp->cl_ds_clients.next, | |
159 | struct nfs4_ds_server, list); | |
160 | list_del(&dss->list); | |
161 | rpc_shutdown_client(dss->rpc_clnt); | |
162 | kfree (dss); | |
163 | } | |
164 | } | |
165 | ||
bc0c9079 OK |
166 | static void |
167 | nfs4_cleanup_callback(struct nfs_client *clp) | |
168 | { | |
169 | struct nfs4_copy_state *cp_state; | |
170 | ||
171 | while (!list_empty(&clp->pending_cb_stateids)) { | |
172 | cp_state = list_entry(clp->pending_cb_stateids.next, | |
173 | struct nfs4_copy_state, copies); | |
174 | list_del(&cp_state->copies); | |
175 | kfree(cp_state); | |
176 | } | |
177 | } | |
178 | ||
abf79bb3 | 179 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
180 | { |
181 | if (nfs4_has_session(clp)) { | |
bc0c9079 | 182 | nfs4_cleanup_callback(clp); |
0e20162e | 183 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
184 | nfs4_destroy_session(clp->cl_session); |
185 | nfs4_destroy_clientid(clp); | |
186 | } | |
187 | ||
188 | } | |
abf79bb3 CL |
189 | #endif /* CONFIG_NFS_V4_1 */ |
190 | ||
191 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 192 | { |
abf79bb3 | 193 | if (clp->cl_slot_tbl) { |
20b9a902 | 194 | nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
abf79bb3 CL |
195 | kfree(clp->cl_slot_tbl); |
196 | } | |
ec409897 | 197 | } |
ec409897 BS |
198 | |
199 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
200 | { | |
dd99e9f9 TM |
201 | char buf[INET6_ADDRSTRLEN + 1]; |
202 | const char *ip_addr = cl_init->ip_addr; | |
ec409897 | 203 | struct nfs_client *clp = nfs_alloc_client(cl_init); |
dd99e9f9 TM |
204 | int err; |
205 | ||
ec409897 BS |
206 | if (IS_ERR(clp)) |
207 | return clp; | |
208 | ||
209 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
210 | if (err) | |
211 | goto error; | |
212 | ||
42c2c424 SD |
213 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
214 | err = -EINVAL; | |
215 | goto error; | |
216 | } | |
217 | ||
ec409897 BS |
218 | spin_lock_init(&clp->cl_lock); |
219 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 220 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
221 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
222 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
ec409897 | 223 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
c9fdeb28 | 224 | clp->cl_mig_gen = 1; |
a1d617d8 JL |
225 | #if IS_ENABLED(CONFIG_NFS_V4_1) |
226 | init_waitqueue_head(&clp->cl_lock_waitq); | |
227 | #endif | |
bc0c9079 | 228 | INIT_LIST_HEAD(&clp->pending_cb_stateids); |
dd99e9f9 TM |
229 | |
230 | if (cl_init->minorversion != 0) | |
231 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
232 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); | |
233 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); | |
234 | ||
51d674a5 OK |
235 | if (test_bit(NFS_CS_DS, &cl_init->init_flags)) |
236 | __set_bit(NFS_CS_DS, &clp->cl_flags); | |
dd99e9f9 TM |
237 | /* |
238 | * Set up the connection to the server before we add add to the | |
239 | * global list. | |
240 | */ | |
241 | err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); | |
242 | if (err == -EINVAL) | |
243 | err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); | |
244 | if (err < 0) | |
245 | goto error; | |
246 | ||
247 | /* If no clientaddr= option was specified, find a usable cb address */ | |
248 | if (ip_addr == NULL) { | |
249 | struct sockaddr_storage cb_addr; | |
250 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
251 | ||
252 | err = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
253 | if (err < 0) | |
254 | goto error; | |
255 | err = rpc_ntop(sap, buf, sizeof(buf)); | |
256 | if (err < 0) | |
257 | goto error; | |
258 | ip_addr = (const char *)buf; | |
259 | } | |
0dd7439f | 260 | strscpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
dd99e9f9 TM |
261 | |
262 | err = nfs_idmap_new(clp); | |
263 | if (err < 0) { | |
264 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
265 | __func__, err); | |
266 | goto error; | |
267 | } | |
268 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
ec409897 BS |
269 | return clp; |
270 | ||
271 | error: | |
7653f6ff | 272 | nfs_free_client(clp); |
ec409897 BS |
273 | return ERR_PTR(err); |
274 | } | |
275 | ||
276 | /* | |
277 | * Destroy the NFS4 callback service | |
278 | */ | |
279 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
280 | { | |
281 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 282 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
283 | } |
284 | ||
285 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
286 | { | |
287 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
288 | nfs4_kill_renewd(clp); | |
abf79bb3 | 289 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
290 | nfs4_destroy_callback(clp); |
291 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
292 | nfs_idmap_delete(clp); | |
293 | ||
294 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
295 | kfree(clp->cl_serverowner); | |
296 | kfree(clp->cl_serverscope); | |
297 | kfree(clp->cl_implid); | |
ceb3a16c | 298 | kfree(clp->cl_owner_id); |
ec409897 BS |
299 | } |
300 | ||
301 | void nfs4_free_client(struct nfs_client *clp) | |
302 | { | |
303 | nfs4_shutdown_client(clp); | |
304 | nfs_free_client(clp); | |
305 | } | |
306 | ||
428360d7 BS |
307 | /* |
308 | * Initialize the NFS4 callback service | |
309 | */ | |
310 | static int nfs4_init_callback(struct nfs_client *clp) | |
311 | { | |
c2ef47b7 | 312 | struct rpc_xprt *xprt; |
428360d7 BS |
313 | int error; |
314 | ||
c2ef47b7 | 315 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
428360d7 | 316 | |
c2ef47b7 CL |
317 | if (nfs4_has_session(clp)) { |
318 | error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
319 | if (error < 0) | |
428360d7 | 320 | return error; |
428360d7 | 321 | } |
c2ef47b7 CL |
322 | |
323 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
324 | if (error < 0) { | |
325 | dprintk("%s: failed to start callback. Error = %d\n", | |
326 | __func__, error); | |
327 | return error; | |
328 | } | |
329 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
330 | ||
428360d7 BS |
331 | return 0; |
332 | } | |
333 | ||
abf79bb3 CL |
334 | /** |
335 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
302fad7b | 336 | * @clp: nfs_client to initialize |
abf79bb3 CL |
337 | * |
338 | * Returns zero on success, or a negative errno if some error occurred. | |
339 | */ | |
340 | int nfs40_init_client(struct nfs_client *clp) | |
341 | { | |
342 | struct nfs4_slot_table *tbl; | |
343 | int ret; | |
344 | ||
345 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
346 | if (tbl == NULL) | |
347 | return -ENOMEM; | |
348 | ||
349 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
350 | "NFSv4.0 transport Slot table"); | |
351 | if (ret) { | |
7e843672 | 352 | nfs4_shutdown_slot_table(tbl); |
abf79bb3 CL |
353 | kfree(tbl); |
354 | return ret; | |
355 | } | |
356 | ||
357 | clp->cl_slot_tbl = tbl; | |
358 | return 0; | |
359 | } | |
360 | ||
361 | #if defined(CONFIG_NFS_V4_1) | |
362 | ||
363 | /** | |
364 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
302fad7b | 365 | * @clp: nfs_client to initialize |
abf79bb3 CL |
366 | * |
367 | * Returns zero on success, or a negative errno if some error occurred. | |
368 | */ | |
369 | int nfs41_init_client(struct nfs_client *clp) | |
370 | { | |
371 | struct nfs4_session *session = NULL; | |
372 | ||
373 | /* | |
374 | * Create the session and mark it expired. | |
375 | * When a SEQUENCE operation encounters the expired session | |
376 | * it will do session recovery to initialize it. | |
377 | */ | |
378 | session = nfs4_alloc_session(clp); | |
379 | if (!session) | |
380 | return -ENOMEM; | |
381 | ||
382 | clp->cl_session = session; | |
383 | ||
384 | /* | |
385 | * The create session reply races with the server back | |
386 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
387 | * so that the client back channel can find the | |
388 | * nfs_client struct | |
389 | */ | |
390 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
391 | return 0; | |
392 | } | |
393 | ||
394 | #endif /* CONFIG_NFS_V4_1 */ | |
395 | ||
428360d7 BS |
396 | /* |
397 | * Initialize the minor version specific parts of an NFS4 client record | |
398 | */ | |
399 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
400 | { | |
abf79bb3 | 401 | int ret; |
428360d7 | 402 | |
abf79bb3 CL |
403 | ret = clp->cl_mvops->init_client(clp); |
404 | if (ret) | |
405 | return ret; | |
428360d7 BS |
406 | return nfs4_init_callback(clp); |
407 | } | |
408 | ||
2a7a451a OK |
409 | static void nfs4_add_trunk(struct nfs_client *clp, struct nfs_client *old) |
410 | { | |
411 | struct sockaddr_storage clp_addr, old_addr; | |
412 | struct sockaddr *clp_sap = (struct sockaddr *)&clp_addr; | |
413 | struct sockaddr *old_sap = (struct sockaddr *)&old_addr; | |
414 | size_t clp_salen; | |
415 | struct xprt_create xprt_args = { | |
416 | .ident = old->cl_proto, | |
417 | .net = old->cl_net, | |
418 | .servername = old->cl_hostname, | |
419 | }; | |
806a3bc4 OK |
420 | int max_connect = test_bit(NFS_CS_PNFS, &clp->cl_flags) ? |
421 | clp->cl_max_connect : old->cl_max_connect; | |
2a7a451a OK |
422 | |
423 | if (clp->cl_proto != old->cl_proto) | |
424 | return; | |
425 | clp_salen = rpc_peeraddr(clp->cl_rpcclient, clp_sap, sizeof(clp_addr)); | |
426 | rpc_peeraddr(old->cl_rpcclient, old_sap, sizeof(old_addr)); | |
427 | ||
428 | if (clp_addr.ss_family != old_addr.ss_family) | |
429 | return; | |
430 | ||
431 | xprt_args.dstaddr = clp_sap; | |
432 | xprt_args.addrlen = clp_salen; | |
433 | ||
434 | rpc_clnt_add_xprt(old->cl_rpcclient, &xprt_args, | |
806a3bc4 | 435 | rpc_clnt_test_and_add_xprt, &max_connect); |
2a7a451a OK |
436 | } |
437 | ||
428360d7 BS |
438 | /** |
439 | * nfs4_init_client - Initialise an NFS4 client record | |
440 | * | |
441 | * @clp: nfs_client to initialise | |
302fad7b | 442 | * @cl_init: pointer to nfs_client_initdata |
428360d7 BS |
443 | * |
444 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
445 | */ | |
446 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
5c6e5b60 | 447 | const struct nfs_client_initdata *cl_init) |
428360d7 | 448 | { |
05f4c350 | 449 | struct nfs_client *old; |
428360d7 BS |
450 | int error; |
451 | ||
4fe6b366 | 452 | if (clp->cl_cons_state == NFS_CS_READY) |
428360d7 | 453 | /* the client is initialised already */ |
428360d7 | 454 | return clp; |
428360d7 | 455 | |
428360d7 BS |
456 | error = nfs4_init_client_minor_version(clp); |
457 | if (error < 0) | |
458 | goto error; | |
459 | ||
05f4c350 CL |
460 | error = nfs4_discover_server_trunking(clp, &old); |
461 | if (error < 0) | |
462 | goto error; | |
05f4c350 | 463 | |
c156618e | 464 | if (clp != old) { |
abad2fa5 | 465 | clp->cl_preserve_clid = true; |
c156618e SM |
466 | /* |
467 | * Mark the client as having failed initialization so other | |
468 | * processes walking the nfs_client_list in nfs_match_client() | |
469 | * won't try to use it. | |
470 | */ | |
471 | nfs_mark_client_ready(clp, -EPERM); | |
2a7a451a OK |
472 | if (old->cl_mvops->session_trunk) |
473 | nfs4_add_trunk(clp, old); | |
c156618e | 474 | } |
8dcbec6d | 475 | clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
476bdb04 | 476 | nfs_put_client(clp); |
abad2fa5 | 477 | return old; |
428360d7 BS |
478 | |
479 | error: | |
480 | nfs_mark_client_ready(clp, error); | |
481 | nfs_put_client(clp); | |
428360d7 BS |
482 | return ERR_PTR(error); |
483 | } | |
fcf10398 | 484 | |
05f4c350 CL |
485 | /* |
486 | * SETCLIENTID just did a callback update with the callback ident in | |
487 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
488 | * actually the same server. Swap the callback IDs so that "keep" | |
489 | * will continue to use the callback ident the server now knows about, | |
490 | * and so that "keep"'s original callback ident is destroyed when | |
491 | * "drop" is freed. | |
492 | */ | |
493 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
494 | struct nfs_client *drop) | |
495 | { | |
496 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
497 | unsigned int save = keep->cl_cb_ident; | |
498 | ||
499 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
500 | return; | |
501 | ||
502 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
503 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
504 | ||
505 | spin_lock(&nn->nfs_client_lock); | |
506 | ||
507 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
508 | keep->cl_cb_ident = drop->cl_cb_ident; | |
509 | ||
510 | idr_replace(&nn->cb_ident_idr, drop, save); | |
511 | drop->cl_cb_ident = save; | |
512 | ||
513 | spin_unlock(&nn->nfs_client_lock); | |
514 | } | |
515 | ||
55b9df93 TM |
516 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
517 | const struct nfs_client *clp2) | |
518 | { | |
519 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
520 | return true; | |
521 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
522 | } | |
523 | ||
ced85a75 BF |
524 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
525 | { | |
526 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
527 | } | |
528 | ||
14d1bbb0 AS |
529 | static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
530 | struct nfs_client **prev, struct nfs_net *nn) | |
531 | { | |
532 | int status; | |
533 | ||
534 | if (pos->rpc_ops != new->rpc_ops) | |
535 | return 1; | |
536 | ||
537 | if (pos->cl_minorversion != new->cl_minorversion) | |
538 | return 1; | |
539 | ||
540 | /* If "pos" isn't marked ready, we can't trust the | |
541 | * remaining fields in "pos", especially the client | |
542 | * ID and serverowner fields. Wait for CREATE_SESSION | |
543 | * to finish. */ | |
544 | if (pos->cl_cons_state > NFS_CS_READY) { | |
212bf41d | 545 | refcount_inc(&pos->cl_count); |
14d1bbb0 AS |
546 | spin_unlock(&nn->nfs_client_lock); |
547 | ||
548 | nfs_put_client(*prev); | |
549 | *prev = pos; | |
550 | ||
551 | status = nfs_wait_client_init_complete(pos); | |
552 | spin_lock(&nn->nfs_client_lock); | |
553 | ||
554 | if (status < 0) | |
555 | return status; | |
556 | } | |
557 | ||
558 | if (pos->cl_cons_state != NFS_CS_READY) | |
559 | return 1; | |
560 | ||
561 | if (pos->cl_clientid != new->cl_clientid) | |
562 | return 1; | |
563 | ||
564 | /* NFSv4.1 always uses the uniform string, however someone | |
565 | * might switch the uniquifier string on us. | |
566 | */ | |
567 | if (!nfs4_match_client_owner_id(pos, new)) | |
568 | return 1; | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
05f4c350 CL |
573 | /** |
574 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
575 | * | |
576 | * @new: nfs_client with client ID to test | |
577 | * @result: OUT: found nfs_client, or new | |
578 | * @cred: credential to use for trunking test | |
579 | * | |
580 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
581 | * If zero is returned, an nfs_client pointer is planted in "result." | |
582 | * | |
583 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
584 | * the last nfs_client on the list. | |
585 | */ | |
586 | int nfs40_walk_client_list(struct nfs_client *new, | |
587 | struct nfs_client **result, | |
a52458b4 | 588 | const struct cred *cred) |
05f4c350 CL |
589 | { |
590 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 591 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
592 | struct nfs4_setclientid_res clid = { |
593 | .clientid = new->cl_clientid, | |
594 | .confirm = new->cl_confirm, | |
595 | }; | |
4ae19c2d | 596 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
597 | |
598 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 599 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 600 | |
c156618e SM |
601 | if (pos == new) |
602 | goto found; | |
603 | ||
14d1bbb0 AS |
604 | status = nfs4_match_client(pos, new, &prev, nn); |
605 | if (status < 0) | |
606 | goto out_unlock; | |
607 | if (status != 0) | |
55b9df93 | 608 | continue; |
ced85a75 BF |
609 | /* |
610 | * We just sent a new SETCLIENTID, which should have | |
611 | * caused the server to return a new cl_confirm. So if | |
612 | * cl_confirm is the same, then this is a different | |
613 | * server that just returned the same cl_confirm by | |
614 | * coincidence: | |
615 | */ | |
616 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
617 | &new->cl_confirm)) | |
618 | continue; | |
619 | /* | |
620 | * But if the cl_confirm's are different, then the only | |
621 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
622 | * if new and pos point to the same server: | |
623 | */ | |
c156618e | 624 | found: |
212bf41d | 625 | refcount_inc(&pos->cl_count); |
05f4c350 CL |
626 | spin_unlock(&nn->nfs_client_lock); |
627 | ||
fe0bf118 | 628 | nfs_put_client(prev); |
4ae19c2d | 629 | prev = pos; |
05f4c350 CL |
630 | |
631 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
632 | switch (status) { |
633 | case -NFS4ERR_STALE_CLIENTID: | |
634 | break; | |
635 | case 0: | |
05f4c350 | 636 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 637 | pos->cl_confirm = new->cl_confirm; |
c156618e | 638 | nfs_mark_client_ready(pos, NFS_CS_READY); |
05f4c350 | 639 | |
4ae19c2d | 640 | prev = NULL; |
05f4c350 | 641 | *result = pos; |
f9b7ebdf TM |
642 | goto out; |
643 | case -ERESTARTSYS: | |
644 | case -ETIMEDOUT: | |
645 | /* The callback path may have been inadvertently | |
646 | * changed. Schedule recovery! | |
647 | */ | |
648 | nfs4_schedule_path_down_recovery(pos); | |
ffb81717 | 649 | goto out; |
4ae19c2d TM |
650 | default: |
651 | goto out; | |
05f4c350 CL |
652 | } |
653 | ||
654 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 655 | } |
14d1bbb0 | 656 | out_unlock: |
4ae19c2d | 657 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 658 | |
202c312d | 659 | /* No match found. The server lost our clientid */ |
4ae19c2d | 660 | out: |
fe0bf118 | 661 | nfs_put_client(prev); |
4ae19c2d | 662 | return status; |
05f4c350 CL |
663 | } |
664 | ||
665 | #ifdef CONFIG_NFS_V4_1 | |
666 | /* | |
1fc0703a | 667 | * Returns true if the server major ids match |
05f4c350 | 668 | */ |
0491567b | 669 | bool |
e7b7cbf6 AA |
670 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
671 | struct nfs41_server_owner *o2) | |
05f4c350 | 672 | { |
05f4c350 | 673 | if (o1->major_id_sz != o2->major_id_sz) |
ddfa0d48 AS |
674 | return false; |
675 | return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; | |
05f4c350 CL |
676 | } |
677 | ||
ba84db96 AA |
678 | /* |
679 | * Returns true if the server scopes match | |
680 | */ | |
681 | static bool | |
682 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
683 | struct nfs41_server_scope *s2) | |
684 | { | |
685 | if (s1->server_scope_sz != s2->server_scope_sz) | |
8da0f934 AS |
686 | return false; |
687 | return memcmp(s1->server_scope, s2->server_scope, | |
688 | s1->server_scope_sz) == 0; | |
ba84db96 AA |
689 | } |
690 | ||
691 | /** | |
ad0849a7 | 692 | * nfs4_detect_session_trunking - Checks for session trunking. |
ba84db96 AA |
693 | * @clp: original mount nfs_client |
694 | * @res: result structure from an exchange_id using the original mount | |
695 | * nfs_client with a new multi_addr transport | |
302fad7b TM |
696 | * @xprt: pointer to the transport to add. |
697 | * | |
698 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
699 | * Upon success, add the transport. | |
ba84db96 AA |
700 | * |
701 | * Returns zero on success, otherwise -EINVAL | |
702 | * | |
703 | * Note: since the exchange_id for the new multi_addr transport uses the | |
704 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
705 | * so eir_clientowner is the same. | |
706 | */ | |
707 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
708 | struct nfs41_exchange_id_res *res, | |
709 | struct rpc_xprt *xprt) | |
710 | { | |
711 | /* Check eir_clientid */ | |
f251fd9e | 712 | if (clp->cl_clientid != res->clientid) |
ba84db96 AA |
713 | goto out_err; |
714 | ||
715 | /* Check eir_server_owner so_major_id */ | |
716 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
717 | res->server_owner)) | |
718 | goto out_err; | |
719 | ||
720 | /* Check eir_server_owner so_minor_id */ | |
5b6d3ff6 | 721 | if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
ba84db96 AA |
722 | goto out_err; |
723 | ||
724 | /* Check eir_server_scope */ | |
725 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
726 | goto out_err; | |
727 | ||
728 | pr_info("NFS: %s: Session trunking succeeded for %s\n", | |
729 | clp->cl_hostname, | |
730 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
731 | ||
732 | return 0; | |
733 | out_err: | |
734 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
735 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
736 | ||
737 | return -EINVAL; | |
738 | } | |
739 | ||
05f4c350 CL |
740 | /** |
741 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
742 | * | |
743 | * @new: nfs_client with client ID to test | |
744 | * @result: OUT: found nfs_client, or new | |
745 | * @cred: credential to use for trunking test | |
746 | * | |
747 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
748 | * If zero is returned, an nfs_client pointer is planted in "result." | |
749 | * | |
750 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
751 | * the last nfs_client on the list. | |
752 | */ | |
753 | int nfs41_walk_client_list(struct nfs_client *new, | |
754 | struct nfs_client **result, | |
a52458b4 | 755 | const struct cred *cred) |
05f4c350 CL |
756 | { |
757 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 758 | struct nfs_client *pos, *prev = NULL; |
202c312d | 759 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
760 | |
761 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 762 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 763 | |
48d66b97 TM |
764 | if (pos == new) |
765 | goto found; | |
766 | ||
14d1bbb0 AS |
767 | status = nfs4_match_client(pos, new, &prev, nn); |
768 | if (status < 0) | |
769 | goto out; | |
770 | if (status != 0) | |
05f4c350 CL |
771 | continue; |
772 | ||
1fc0703a TM |
773 | /* |
774 | * Note that session trunking is just a special subcase of | |
775 | * client id trunking. In either case, we want to fall back | |
776 | * to using the existing nfs_client. | |
777 | */ | |
e7b7cbf6 AA |
778 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
779 | new->cl_serverowner)) | |
05f4c350 CL |
780 | continue; |
781 | ||
48d66b97 | 782 | found: |
212bf41d | 783 | refcount_inc(&pos->cl_count); |
7b1f1fd1 | 784 | *result = pos; |
eb04e0ac | 785 | status = 0; |
7b1f1fd1 | 786 | break; |
05f4c350 CL |
787 | } |
788 | ||
14d1bbb0 | 789 | out: |
05f4c350 | 790 | spin_unlock(&nn->nfs_client_lock); |
fe0bf118 | 791 | nfs_put_client(prev); |
202c312d | 792 | return status; |
05f4c350 CL |
793 | } |
794 | #endif /* CONFIG_NFS_V4_1 */ | |
795 | ||
fcf10398 BS |
796 | static void nfs4_destroy_server(struct nfs_server *server) |
797 | { | |
c77e2283 TM |
798 | LIST_HEAD(freeme); |
799 | ||
fcf10398 BS |
800 | nfs_server_return_all_delegations(server); |
801 | unset_pnfs_layoutdriver(server); | |
c77e2283 TM |
802 | nfs4_purge_state_owners(server, &freeme); |
803 | nfs4_free_state_owners(&freeme); | |
fcf10398 BS |
804 | } |
805 | ||
806 | /* | |
807 | * NFSv4.0 callback thread helper | |
808 | * | |
809 | * Find a client by callback identifier | |
810 | */ | |
811 | struct nfs_client * | |
812 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
813 | { | |
814 | struct nfs_client *clp; | |
815 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
816 | ||
817 | spin_lock(&nn->nfs_client_lock); | |
818 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
819 | if (clp) | |
212bf41d | 820 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
821 | spin_unlock(&nn->nfs_client_lock); |
822 | return clp; | |
823 | } | |
824 | ||
825 | #if defined(CONFIG_NFS_V4_1) | |
826 | /* Common match routine for v4.0 and v4.1 callback services */ | |
827 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
828 | struct nfs_client *clp, u32 minorversion) | |
829 | { | |
830 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
831 | ||
832 | /* Don't match clients that failed to initialise */ | |
833 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
834 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
835 | return false; | |
836 | ||
837 | smp_rmb(); | |
838 | ||
839 | /* Match the version and minorversion */ | |
840 | if (clp->rpc_ops->version != 4 || | |
841 | clp->cl_minorversion != minorversion) | |
842 | return false; | |
843 | ||
844 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 845 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
846 | } |
847 | ||
848 | /* | |
849 | * NFSv4.1 callback thread helper | |
850 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
851 | * minorversion, and sessionID | |
852 | * | |
853 | * Returns NULL if no such client | |
854 | */ | |
855 | struct nfs_client * | |
856 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 857 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
858 | { |
859 | struct nfs_client *clp; | |
860 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
861 | ||
862 | spin_lock(&nn->nfs_client_lock); | |
863 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
6089dd0d | 864 | if (!nfs4_cb_match_client(addr, clp, minorversion)) |
fcf10398 BS |
865 | continue; |
866 | ||
867 | if (!nfs4_has_session(clp)) | |
868 | continue; | |
869 | ||
870 | /* Match sessionid*/ | |
871 | if (memcmp(clp->cl_session->sess_id.data, | |
872 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
873 | continue; | |
874 | ||
212bf41d | 875 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
876 | spin_unlock(&nn->nfs_client_lock); |
877 | return clp; | |
878 | } | |
879 | spin_unlock(&nn->nfs_client_lock); | |
880 | return NULL; | |
881 | } | |
882 | ||
883 | #else /* CONFIG_NFS_V4_1 */ | |
884 | ||
885 | struct nfs_client * | |
886 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 887 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
888 | { |
889 | return NULL; | |
890 | } | |
891 | #endif /* CONFIG_NFS_V4_1 */ | |
892 | ||
893 | /* | |
894 | * Set up an NFS4 client | |
895 | */ | |
896 | static int nfs4_set_client(struct nfs_server *server, | |
897 | const char *hostname, | |
cf0d7e7f | 898 | const struct sockaddr_storage *addr, |
fcf10398 BS |
899 | const size_t addrlen, |
900 | const char *ip_addr, | |
fcf10398 | 901 | int proto, const struct rpc_timeout *timeparms, |
6619079d | 902 | u32 minorversion, unsigned int nconnect, |
7e134205 | 903 | unsigned int max_connect, |
6c0a8c5f CL |
904 | struct net *net, |
905 | struct xprtsec_parms *xprtsec) | |
fcf10398 BS |
906 | { |
907 | struct nfs_client_initdata cl_init = { | |
908 | .hostname = hostname, | |
909 | .addr = addr, | |
910 | .addrlen = addrlen, | |
5c6e5b60 | 911 | .ip_addr = ip_addr, |
ab7017a3 | 912 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
913 | .proto = proto, |
914 | .minorversion = minorversion, | |
915 | .net = net, | |
5c6e5b60 | 916 | .timeparms = timeparms, |
1a58e8a0 | 917 | .cred = server->cred, |
6c0a8c5f | 918 | .xprtsec = *xprtsec, |
fcf10398 BS |
919 | }; |
920 | struct nfs_client *clp; | |
fcf10398 | 921 | |
e6237b6f TM |
922 | if (minorversion == 0) |
923 | __set_bit(NFS_CS_REUSEPORT, &cl_init.init_flags); | |
7e134205 OK |
924 | else |
925 | cl_init.max_connect = max_connect; | |
c8407f2e CL |
926 | switch (proto) { |
927 | case XPRT_TRANSPORT_TCP: | |
928 | case XPRT_TRANSPORT_TCP_TLS: | |
6619079d | 929 | cl_init.nconnect = nconnect; |
c8407f2e | 930 | } |
e6237b6f | 931 | |
fcf10398 | 932 | if (server->flags & NFS_MOUNT_NORESVPORT) |
d0372b67 | 933 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
f112bb48 | 934 | if (server->options & NFS_OPTION_MIGRATION) |
d0372b67 | 935 | __set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); |
8dcbec6d | 936 | if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
d0372b67 | 937 | __set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); |
cf0d7e7f | 938 | server->port = rpc_get_port((struct sockaddr *)addr); |
fcf10398 BS |
939 | |
940 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 941 | clp = nfs_get_client(&cl_init); |
2dc42c0d AS |
942 | if (IS_ERR(clp)) |
943 | return PTR_ERR(clp); | |
fcf10398 | 944 | |
ad86f605 BB |
945 | if (server->nfs_client == clp) { |
946 | nfs_put_client(clp); | |
2dc42c0d | 947 | return -ELOOP; |
ad86f605 | 948 | } |
52442f9b | 949 | |
fcf10398 BS |
950 | /* |
951 | * Query for the lease time on clientid setup or renewal | |
952 | * | |
953 | * Note that this will be set on nfs_clients that were created | |
954 | * only for the DS role and did not set this bit, but now will | |
955 | * serve a dual role. | |
956 | */ | |
957 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
958 | ||
959 | server->nfs_client = clp; | |
1c725118 | 960 | nfs_sysfs_add_server(server); |
e13b5493 | 961 | nfs_sysfs_link_rpc_client(server, clp->cl_rpcclient, "_state"); |
1c725118 | 962 | |
fcf10398 | 963 | return 0; |
fcf10398 BS |
964 | } |
965 | ||
966 | /* | |
967 | * Set up a pNFS Data Server client. | |
968 | * | |
969 | * Return any existing nfs_client that matches server address,port,version | |
970 | * and minorversion. | |
971 | * | |
972 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
973 | * low timeout interval so that if a connection is lost, we retry through | |
974 | * the MDS. | |
975 | */ | |
3fc75f12 | 976 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
cf0d7e7f | 977 | const struct sockaddr_storage *ds_addr, int ds_addrlen, |
064172f3 | 978 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 979 | u32 minor_version) |
fcf10398 | 980 | { |
5c6e5b60 | 981 | struct rpc_timeout ds_timeout; |
3fc75f12 | 982 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
983 | struct nfs_client_initdata cl_init = { |
984 | .addr = ds_addr, | |
985 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
986 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
987 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 988 | .nfs_mod = &nfs_v4, |
fcf10398 | 989 | .proto = ds_proto, |
30626f9c | 990 | .minorversion = minor_version, |
fcf10398 | 991 | .net = mds_clp->cl_net, |
5c6e5b60 | 992 | .timeparms = &ds_timeout, |
1a58e8a0 | 993 | .cred = mds_srv->cred, |
6c0a8c5f | 994 | .xprtsec = mds_srv->nfs_client->cl_xprtsec, |
fcf10398 | 995 | }; |
a363e32e PT |
996 | char buf[INET6_ADDRSTRLEN + 1]; |
997 | ||
cf0d7e7f | 998 | if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0) |
a363e32e PT |
999 | return ERR_PTR(-EINVAL); |
1000 | cl_init.hostname = buf; | |
fcf10398 | 1001 | |
c8407f2e CL |
1002 | switch (ds_proto) { |
1003 | case XPRT_TRANSPORT_TCP: | |
1004 | case XPRT_TRANSPORT_TCP_TLS: | |
1005 | if (mds_clp->cl_nconnect > 1) { | |
1006 | cl_init.nconnect = mds_clp->cl_nconnect; | |
1007 | cl_init.max_connect = NFS_MAX_TRANSPORTS; | |
1008 | } | |
7e134205 | 1009 | } |
bb71e4a5 | 1010 | |
3fc75f12 TM |
1011 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
1012 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
1013 | ||
51d674a5 | 1014 | __set_bit(NFS_CS_DS, &cl_init.init_flags); |
806a3bc4 OK |
1015 | __set_bit(NFS_CS_PNFS, &cl_init.init_flags); |
1016 | cl_init.max_connect = NFS_MAX_TRANSPORTS; | |
fcf10398 BS |
1017 | /* |
1018 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1019 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1020 | * (section 13.1 RFC 5661). | |
1021 | */ | |
1022 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
4fe6b366 | 1023 | return nfs_get_client(&cl_init); |
fcf10398 BS |
1024 | } |
1025 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
1026 | ||
1027 | /* | |
1028 | * Session has been established, and the client marked ready. | |
943cff67 TM |
1029 | * Limit the mount rsize, wsize and dtsize using negotiated fore |
1030 | * channel attributes. | |
fcf10398 | 1031 | */ |
943cff67 | 1032 | static void nfs4_session_limit_rwsize(struct nfs_server *server) |
fcf10398 BS |
1033 | { |
1034 | #ifdef CONFIG_NFS_V4_1 | |
1035 | struct nfs4_session *sess; | |
1036 | u32 server_resp_sz; | |
1037 | u32 server_rqst_sz; | |
1038 | ||
1039 | if (!nfs4_has_session(server->nfs_client)) | |
1040 | return; | |
1041 | sess = server->nfs_client->cl_session; | |
1042 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1043 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1044 | ||
943cff67 TM |
1045 | if (server->dtsize > server_resp_sz) |
1046 | server->dtsize = server_resp_sz; | |
1047 | if (server->rsize > server_resp_sz) | |
fcf10398 | 1048 | server->rsize = server_resp_sz; |
943cff67 | 1049 | if (server->wsize > server_rqst_sz) |
fcf10398 BS |
1050 | server->wsize = server_rqst_sz; |
1051 | #endif /* CONFIG_NFS_V4_1 */ | |
1052 | } | |
1053 | ||
04a5da69 FL |
1054 | /* |
1055 | * Limit xattr sizes using the channel attributes. | |
1056 | */ | |
1057 | static void nfs4_session_limit_xasize(struct nfs_server *server) | |
1058 | { | |
1059 | #ifdef CONFIG_NFS_V4_2 | |
1060 | struct nfs4_session *sess; | |
1061 | u32 server_gxa_sz; | |
1062 | u32 server_sxa_sz; | |
1063 | u32 server_lxa_sz; | |
1064 | ||
1065 | if (!nfs4_has_session(server->nfs_client)) | |
1066 | return; | |
1067 | ||
1068 | sess = server->nfs_client->cl_session; | |
1069 | ||
1070 | server_gxa_sz = sess->fc_attrs.max_resp_sz - nfs42_maxgetxattr_overhead; | |
1071 | server_sxa_sz = sess->fc_attrs.max_rqst_sz - nfs42_maxsetxattr_overhead; | |
1072 | server_lxa_sz = sess->fc_attrs.max_resp_sz - | |
1073 | nfs42_maxlistxattrs_overhead; | |
1074 | ||
1075 | if (server->gxasize > server_gxa_sz) | |
1076 | server->gxasize = server_gxa_sz; | |
1077 | if (server->sxasize > server_sxa_sz) | |
1078 | server->sxasize = server_sxa_sz; | |
1079 | if (server->lxasize > server_lxa_sz) | |
1080 | server->lxasize = server_lxa_sz; | |
1081 | #endif | |
1082 | } | |
1083 | ||
01dde76e AS |
1084 | void nfs4_server_set_init_caps(struct nfs_server *server) |
1085 | { | |
1086 | /* Set the basic capabilities */ | |
1087 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
1088 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
1089 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
1090 | if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) | |
1091 | server->caps &= ~NFS_CAP_READ_PLUS; | |
1092 | ||
1093 | /* | |
1094 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1095 | * authentication. | |
1096 | */ | |
1097 | if (nfs4_disable_idmapping && | |
1098 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
1099 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1100 | } | |
1101 | ||
fcf10398 | 1102 | static int nfs4_server_common_setup(struct nfs_server *server, |
5e6b1990 | 1103 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 | 1104 | { |
fcf10398 BS |
1105 | int error; |
1106 | ||
fcf10398 BS |
1107 | /* data servers support only a subset of NFSv4.1 */ |
1108 | if (is_ds_only_client(server->nfs_client)) | |
1109 | return -EPROTONOSUPPORT; | |
1110 | ||
fcf10398 | 1111 | /* We must ensure the session is initialised first */ |
18aad3d5 | 1112 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
1113 | if (error < 0) |
1114 | goto out; | |
1115 | ||
01dde76e | 1116 | nfs4_server_set_init_caps(server); |
39c6daae | 1117 | |
fcf10398 | 1118 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 1119 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
1120 | if (error < 0) |
1121 | goto out; | |
1122 | ||
1123 | dprintk("Server FSID: %llx:%llx\n", | |
1124 | (unsigned long long) server->fsid.major, | |
1125 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 1126 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 | 1127 | |
4d4cf8d2 | 1128 | error = nfs_probe_server(server, mntfh); |
fcf10398 BS |
1129 | if (error < 0) |
1130 | goto out; | |
1131 | ||
943cff67 | 1132 | nfs4_session_limit_rwsize(server); |
04a5da69 | 1133 | nfs4_session_limit_xasize(server); |
943cff67 | 1134 | |
fcf10398 BS |
1135 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1136 | server->namelen = NFS4_MAXNAMLEN; | |
1137 | ||
1138 | nfs_server_insert_lists(server); | |
1139 | server->mount_time = jiffies; | |
1140 | server->destroy = nfs4_destroy_server; | |
1141 | out: | |
fcf10398 BS |
1142 | return error; |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Create a version 4 volume record | |
1147 | */ | |
62a55d08 | 1148 | static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) |
fcf10398 | 1149 | { |
62a55d08 | 1150 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 BS |
1151 | struct rpc_timeout timeparms; |
1152 | int error; | |
1153 | ||
5eb005ca DH |
1154 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
1155 | ctx->timeo, ctx->retrans); | |
fcf10398 BS |
1156 | |
1157 | /* Initialise the client representation from the mount data */ | |
5eb005ca DH |
1158 | server->flags = ctx->flags; |
1159 | server->options = ctx->options; | |
1160 | server->auth_info = ctx->auth_info; | |
fcf10398 | 1161 | |
4d4b69dd WAA |
1162 | /* Use the first specified auth flavor. If this flavor isn't |
1163 | * allowed by the server, use the SECINFO path to try the | |
1164 | * other specified flavors */ | |
5eb005ca DH |
1165 | if (ctx->auth_info.flavor_len >= 1) |
1166 | ctx->selected_flavor = ctx->auth_info.flavors[0]; | |
a3f73c27 | 1167 | else |
5eb005ca | 1168 | ctx->selected_flavor = RPC_AUTH_UNIX; |
5e6b1990 | 1169 | |
fcf10398 BS |
1170 | /* Get a client record */ |
1171 | error = nfs4_set_client(server, | |
62a55d08 | 1172 | ctx->nfs_server.hostname, |
cf0d7e7f | 1173 | &ctx->nfs_server._address, |
62a55d08 SM |
1174 | ctx->nfs_server.addrlen, |
1175 | ctx->client_address, | |
1176 | ctx->nfs_server.protocol, | |
1177 | &timeparms, | |
1178 | ctx->minorversion, | |
1179 | ctx->nfs_server.nconnect, | |
7e134205 | 1180 | ctx->nfs_server.max_connect, |
6c0a8c5f | 1181 | fc->net_ns, |
c8407f2e | 1182 | &ctx->xprtsec); |
fcf10398 | 1183 | if (error < 0) |
1073d9b4 | 1184 | return error; |
fcf10398 | 1185 | |
5eb005ca | 1186 | if (ctx->rsize) |
940261a1 | 1187 | server->rsize = nfs_io_size(ctx->rsize, server->nfs_client->cl_proto); |
5eb005ca | 1188 | if (ctx->wsize) |
940261a1 | 1189 | server->wsize = nfs_io_size(ctx->wsize, server->nfs_client->cl_proto); |
fcf10398 | 1190 | |
5eb005ca DH |
1191 | server->acregmin = ctx->acregmin * HZ; |
1192 | server->acregmax = ctx->acregmax * HZ; | |
1193 | server->acdirmin = ctx->acdirmin * HZ; | |
1194 | server->acdirmax = ctx->acdirmax * HZ; | |
1195 | server->port = ctx->nfs_server.port; | |
fcf10398 | 1196 | |
1073d9b4 | 1197 | return nfs_init_server_rpcclient(server, &timeparms, |
5eb005ca | 1198 | ctx->selected_flavor); |
fcf10398 BS |
1199 | } |
1200 | ||
1201 | /* | |
1202 | * Create a version 4 volume record | |
1203 | * - keyed on server and FSID | |
1204 | */ | |
62a55d08 | 1205 | struct nfs_server *nfs4_create_server(struct fs_context *fc) |
fcf10398 | 1206 | { |
62a55d08 | 1207 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 | 1208 | struct nfs_server *server; |
5e6b1990 | 1209 | bool auth_probe; |
fcf10398 BS |
1210 | int error; |
1211 | ||
fcf10398 BS |
1212 | server = nfs_alloc_server(); |
1213 | if (!server) | |
1214 | return ERR_PTR(-ENOMEM); | |
1215 | ||
d3ff46fe | 1216 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 1217 | |
62a55d08 | 1218 | auth_probe = ctx->auth_info.flavor_len < 1; |
5e6b1990 | 1219 | |
fcf10398 | 1220 | /* set up the general RPC client */ |
62a55d08 | 1221 | error = nfs4_init_server(server, fc); |
fcf10398 BS |
1222 | if (error < 0) |
1223 | goto error; | |
1224 | ||
62a55d08 | 1225 | error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
fcf10398 BS |
1226 | if (error < 0) |
1227 | goto error; | |
1228 | ||
fcf10398 BS |
1229 | return server; |
1230 | ||
1231 | error: | |
1232 | nfs_free_server(server); | |
fcf10398 BS |
1233 | return ERR_PTR(error); |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Create an NFS4 referral server record | |
1238 | */ | |
62a55d08 | 1239 | struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) |
fcf10398 | 1240 | { |
62a55d08 | 1241 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 BS |
1242 | struct nfs_client *parent_client; |
1243 | struct nfs_server *server, *parent_server; | |
c8407f2e | 1244 | int proto, error; |
5837f6df | 1245 | bool auth_probe; |
fcf10398 | 1246 | |
fcf10398 BS |
1247 | server = nfs_alloc_server(); |
1248 | if (!server) | |
1249 | return ERR_PTR(-ENOMEM); | |
1250 | ||
62a55d08 | 1251 | parent_server = NFS_SB(ctx->clone_data.sb); |
fcf10398 BS |
1252 | parent_client = parent_server->nfs_client; |
1253 | ||
1a58e8a0 TM |
1254 | server->cred = get_cred(parent_server->cred); |
1255 | ||
fcf10398 BS |
1256 | /* Initialise the client representation from the parent server */ |
1257 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 | 1258 | |
530ea421 | 1259 | /* Get a client representation */ |
23a88ade | 1260 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
62a55d08 SM |
1261 | rpc_set_port(&ctx->nfs_server.address, NFS_RDMA_PORT); |
1262 | error = nfs4_set_client(server, | |
1263 | ctx->nfs_server.hostname, | |
cf0d7e7f | 1264 | &ctx->nfs_server._address, |
62a55d08 | 1265 | ctx->nfs_server.addrlen, |
fcf10398 | 1266 | parent_client->cl_ipaddr, |
530ea421 CL |
1267 | XPRT_TRANSPORT_RDMA, |
1268 | parent_server->client->cl_timeout, | |
1269 | parent_client->cl_mvops->minor_version, | |
6619079d | 1270 | parent_client->cl_nconnect, |
7e134205 | 1271 | parent_client->cl_max_connect, |
6c0a8c5f CL |
1272 | parent_client->cl_net, |
1273 | &parent_client->cl_xprtsec); | |
530ea421 CL |
1274 | if (!error) |
1275 | goto init_server; | |
23a88ade | 1276 | #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ |
530ea421 | 1277 | |
c8407f2e CL |
1278 | proto = XPRT_TRANSPORT_TCP; |
1279 | if (parent_client->cl_xprtsec.policy != RPC_XPRTSEC_NONE) | |
1280 | proto = XPRT_TRANSPORT_TCP_TLS; | |
62a55d08 SM |
1281 | rpc_set_port(&ctx->nfs_server.address, NFS_PORT); |
1282 | error = nfs4_set_client(server, | |
1283 | ctx->nfs_server.hostname, | |
cf0d7e7f | 1284 | &ctx->nfs_server._address, |
62a55d08 | 1285 | ctx->nfs_server.addrlen, |
530ea421 | 1286 | parent_client->cl_ipaddr, |
c8407f2e | 1287 | proto, |
fcf10398 BS |
1288 | parent_server->client->cl_timeout, |
1289 | parent_client->cl_mvops->minor_version, | |
6619079d | 1290 | parent_client->cl_nconnect, |
7e134205 | 1291 | parent_client->cl_max_connect, |
6c0a8c5f CL |
1292 | parent_client->cl_net, |
1293 | &parent_client->cl_xprtsec); | |
fcf10398 BS |
1294 | if (error < 0) |
1295 | goto error; | |
1296 | ||
23a88ade | 1297 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 CL |
1298 | init_server: |
1299 | #endif | |
62a55d08 SM |
1300 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, |
1301 | ctx->selected_flavor); | |
fcf10398 BS |
1302 | if (error < 0) |
1303 | goto error; | |
1304 | ||
5837f6df WAA |
1305 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1306 | ||
62a55d08 | 1307 | error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
fcf10398 BS |
1308 | if (error < 0) |
1309 | goto error; | |
1310 | ||
fcf10398 BS |
1311 | return server; |
1312 | ||
1313 | error: | |
1314 | nfs_free_server(server); | |
fcf10398 BS |
1315 | return ERR_PTR(error); |
1316 | } | |
32e62b7c | 1317 | |
32e62b7c CL |
1318 | /** |
1319 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1320 | * | |
1321 | * @server: represents FSID to be moved | |
1322 | * @hostname: new end-point's hostname | |
1323 | * @sap: new end-point's socket address | |
1324 | * @salen: size of "sap" | |
292f503c | 1325 | * @net: net namespace |
32e62b7c CL |
1326 | * |
1327 | * The nfs_server must be quiescent before this function is invoked. | |
1328 | * Either its session is drained (NFSv4.1+), or its transport is | |
1329 | * plugged and drained (NFSv4.0). | |
1330 | * | |
1331 | * Returns zero on success, or a negative errno value. | |
1332 | */ | |
1333 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
cf0d7e7f | 1334 | struct sockaddr_storage *sap, size_t salen, struct net *net) |
32e62b7c CL |
1335 | { |
1336 | struct nfs_client *clp = server->nfs_client; | |
1337 | struct rpc_clnt *clnt = server->client; | |
1338 | struct xprt_create xargs = { | |
1339 | .ident = clp->cl_proto, | |
292f503c | 1340 | .net = net, |
cf0d7e7f | 1341 | .dstaddr = (struct sockaddr *)sap, |
32e62b7c CL |
1342 | .addrlen = salen, |
1343 | .servername = hostname, | |
c8407f2e | 1344 | /* cel: bleh. We might need to pass TLS parameters here */ |
32e62b7c CL |
1345 | }; |
1346 | char buf[INET6_ADDRSTRLEN + 1]; | |
1347 | struct sockaddr_storage address; | |
1348 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1349 | int error; | |
1350 | ||
32e62b7c | 1351 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
4fe6b366 AS |
1352 | if (error != 0) |
1353 | return error; | |
32e62b7c CL |
1354 | |
1355 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
4fe6b366 AS |
1356 | if (error != 0) |
1357 | return error; | |
32e62b7c | 1358 | |
4fe6b366 AS |
1359 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
1360 | return -EAFNOSUPPORT; | |
32e62b7c CL |
1361 | |
1362 | nfs_server_remove_lists(server); | |
8dcbec6d | 1363 | set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c | 1364 | error = nfs4_set_client(server, hostname, sap, salen, buf, |
32e62b7c | 1365 | clp->cl_proto, clnt->cl_timeout, |
6619079d | 1366 | clp->cl_minorversion, |
6c0a8c5f CL |
1367 | clp->cl_nconnect, clp->cl_max_connect, |
1368 | net, &clp->cl_xprtsec); | |
8dcbec6d | 1369 | clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c CL |
1370 | if (error != 0) { |
1371 | nfs_server_insert_lists(server); | |
4fe6b366 | 1372 | return error; |
32e62b7c | 1373 | } |
ad86f605 | 1374 | nfs_put_client(clp); |
32e62b7c | 1375 | |
fbd2057e | 1376 | if (server->nfs_client->cl_hostname == NULL) { |
32e62b7c | 1377 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); |
fbd2057e XW |
1378 | if (server->nfs_client->cl_hostname == NULL) |
1379 | return -ENOMEM; | |
1380 | } | |
32e62b7c CL |
1381 | nfs_server_insert_lists(server); |
1382 | ||
e5731131 | 1383 | return nfs_probe_server(server, NFS_FH(d_inode(server->super->s_root))); |
32e62b7c | 1384 | } |