blob: bb9789ef1d4987fc5db66e59de92e4a0a8961c53 [file] [log] [blame]
Bryan Schumaker428360d2012-07-16 16:39:17 -04001/*
2 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
3 * Written by David Howells (dhowells@redhat.com)
4 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -04005#include <linux/module.h>
Bryan Schumaker428360d2012-07-16 16:39:17 -04006#include <linux/nfs_fs.h>
7#include <linux/nfs_idmap.h>
Bryan Schumakerfcf10392012-07-16 16:39:18 -04008#include <linux/nfs_mount.h>
Jeff Layton59766872013-02-04 12:50:00 -05009#include <linux/sunrpc/addr.h>
Bryan Schumaker428360d2012-07-16 16:39:17 -040010#include <linux/sunrpc/auth.h>
11#include <linux/sunrpc/xprt.h>
12#include <linux/sunrpc/bc_xprt.h>
13#include "internal.h"
14#include "callback.h"
Bryan Schumakerfcf10392012-07-16 16:39:18 -040015#include "delegation.h"
Trond Myklebust73e39aa2012-11-26 12:49:34 -050016#include "nfs4session.h"
Bryan Schumakerfcf10392012-07-16 16:39:18 -040017#include "pnfs.h"
18#include "netns.h"
Bryan Schumaker428360d2012-07-16 16:39:17 -040019
20#define NFSDBG_FACILITY NFSDBG_CLIENT
21
22/*
Bryan Schumakerec409892012-07-16 16:39:21 -040023 * Get a unique NFSv4.0 callback identifier which will be used
24 * by the V4.0 callback service to lookup the nfs_client struct
25 */
26static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
27{
28 int ret = 0;
29 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
30
31 if (clp->rpc_ops->version != 4 || minorversion != 0)
32 return ret;
Tejun Heod6870312013-02-27 17:05:01 -080033 idr_preload(GFP_KERNEL);
Bryan Schumakerec409892012-07-16 16:39:21 -040034 spin_lock(&nn->nfs_client_lock);
Tejun Heod6870312013-02-27 17:05:01 -080035 ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT);
36 if (ret >= 0)
37 clp->cl_cb_ident = ret;
Bryan Schumakerec409892012-07-16 16:39:21 -040038 spin_unlock(&nn->nfs_client_lock);
Tejun Heod6870312013-02-27 17:05:01 -080039 idr_preload_end();
40 return ret < 0 ? ret : 0;
Bryan Schumakerec409892012-07-16 16:39:21 -040041}
42
43#ifdef CONFIG_NFS_V4_1
44static void nfs4_shutdown_session(struct nfs_client *clp)
45{
46 if (nfs4_has_session(clp)) {
47 nfs4_destroy_session(clp->cl_session);
48 nfs4_destroy_clientid(clp);
49 }
50
51}
52#else /* CONFIG_NFS_V4_1 */
53static void nfs4_shutdown_session(struct nfs_client *clp)
54{
55}
56#endif /* CONFIG_NFS_V4_1 */
57
58struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
59{
60 int err;
61 struct nfs_client *clp = nfs_alloc_client(cl_init);
62 if (IS_ERR(clp))
63 return clp;
64
65 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
66 if (err)
67 goto error;
68
69 spin_lock_init(&clp->cl_lock);
70 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
71 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
72 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
73 clp->cl_minorversion = cl_init->minorversion;
74 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
75 return clp;
76
77error:
Trond Myklebust7653f6f2012-08-20 12:12:29 -040078 nfs_free_client(clp);
Bryan Schumakerec409892012-07-16 16:39:21 -040079 return ERR_PTR(err);
80}
81
82/*
83 * Destroy the NFS4 callback service
84 */
85static void nfs4_destroy_callback(struct nfs_client *clp)
86{
87 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
Stanislav Kinsburskyc9465562012-08-20 18:00:16 +040088 nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net);
Bryan Schumakerec409892012-07-16 16:39:21 -040089}
90
91static void nfs4_shutdown_client(struct nfs_client *clp)
92{
93 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
94 nfs4_kill_renewd(clp);
95 nfs4_shutdown_session(clp);
96 nfs4_destroy_callback(clp);
97 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
98 nfs_idmap_delete(clp);
99
100 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
101 kfree(clp->cl_serverowner);
102 kfree(clp->cl_serverscope);
103 kfree(clp->cl_implid);
104}
105
106void nfs4_free_client(struct nfs_client *clp)
107{
108 nfs4_shutdown_client(clp);
109 nfs_free_client(clp);
110}
111
112/*
Bryan Schumaker428360d2012-07-16 16:39:17 -0400113 * Initialize the NFS4 callback service
114 */
115static int nfs4_init_callback(struct nfs_client *clp)
116{
117 int error;
118
119 if (clp->rpc_ops->version == 4) {
120 struct rpc_xprt *xprt;
121
122 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
123
124 if (nfs4_has_session(clp)) {
125 error = xprt_setup_backchannel(xprt,
126 NFS41_BC_MIN_CALLBACKS);
127 if (error < 0)
128 return error;
129 }
130
131 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
132 if (error < 0) {
133 dprintk("%s: failed to start callback. Error = %d\n",
134 __func__, error);
135 return error;
136 }
137 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
138 }
139 return 0;
140}
141
142/*
143 * Initialize the minor version specific parts of an NFS4 client record
144 */
145static int nfs4_init_client_minor_version(struct nfs_client *clp)
146{
147#if defined(CONFIG_NFS_V4_1)
148 if (clp->cl_mvops->minor_version) {
149 struct nfs4_session *session = NULL;
150 /*
151 * Create the session and mark it expired.
152 * When a SEQUENCE operation encounters the expired session
153 * it will do session recovery to initialize it.
154 */
155 session = nfs4_alloc_session(clp);
156 if (!session)
157 return -ENOMEM;
158
159 clp->cl_session = session;
160 /*
161 * The create session reply races with the server back
162 * channel probe. Mark the client NFS_CS_SESSION_INITING
163 * so that the client back channel can find the
164 * nfs_client struct
165 */
166 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
167 }
168#endif /* CONFIG_NFS_V4_1 */
169
170 return nfs4_init_callback(clp);
171}
172
173/**
174 * nfs4_init_client - Initialise an NFS4 client record
175 *
176 * @clp: nfs_client to initialise
177 * @timeparms: timeout parameters for underlying RPC transport
178 * @ip_addr: callback IP address in presentation format
179 * @authflavor: authentication flavor for underlying RPC transport
180 *
181 * Returns pointer to an NFS client, or an ERR_PTR value.
182 */
183struct nfs_client *nfs4_init_client(struct nfs_client *clp,
184 const struct rpc_timeout *timeparms,
185 const char *ip_addr,
186 rpc_authflavor_t authflavour)
187{
188 char buf[INET6_ADDRSTRLEN + 1];
Chuck Lever05f4c352012-09-14 17:24:32 -0400189 struct nfs_client *old;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400190 int error;
191
192 if (clp->cl_cons_state == NFS_CS_READY) {
193 /* the client is initialised already */
194 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
195 return clp;
196 }
197
198 /* Check NFS protocol revision and initialize RPC op vector */
199 clp->rpc_ops = &nfs_v4_clientops;
200
201 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
Chuck Lever4edaa302013-03-16 15:56:20 -0400202 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400203 if (error < 0)
204 goto error;
205
206 /* If no clientaddr= option was specified, find a usable cb address */
207 if (ip_addr == NULL) {
208 struct sockaddr_storage cb_addr;
209 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
210
211 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
212 if (error < 0)
213 goto error;
214 error = rpc_ntop(sap, buf, sizeof(buf));
215 if (error < 0)
216 goto error;
217 ip_addr = (const char *)buf;
218 }
219 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
220
221 error = nfs_idmap_new(clp);
222 if (error < 0) {
223 dprintk("%s: failed to create idmapper. Error = %d\n",
224 __func__, error);
225 goto error;
226 }
227 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
228
229 error = nfs4_init_client_minor_version(clp);
230 if (error < 0)
231 goto error;
232
233 if (!nfs4_has_session(clp))
234 nfs_mark_client_ready(clp, NFS_CS_READY);
Chuck Lever05f4c352012-09-14 17:24:32 -0400235
236 error = nfs4_discover_server_trunking(clp, &old);
237 if (error < 0)
238 goto error;
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500239 nfs_put_client(clp);
Chuck Lever05f4c352012-09-14 17:24:32 -0400240 if (clp != old) {
241 clp->cl_preserve_clid = true;
Chuck Lever05f4c352012-09-14 17:24:32 -0400242 clp = old;
Chuck Lever05f4c352012-09-14 17:24:32 -0400243 }
244
Bryan Schumaker428360d2012-07-16 16:39:17 -0400245 return clp;
246
247error:
248 nfs_mark_client_ready(clp, error);
249 nfs_put_client(clp);
250 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
251 return ERR_PTR(error);
252}
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400253
Chuck Lever05f4c352012-09-14 17:24:32 -0400254/*
Chuck Lever05f4c352012-09-14 17:24:32 -0400255 * SETCLIENTID just did a callback update with the callback ident in
256 * "drop," but server trunking discovery claims "drop" and "keep" are
257 * actually the same server. Swap the callback IDs so that "keep"
258 * will continue to use the callback ident the server now knows about,
259 * and so that "keep"'s original callback ident is destroyed when
260 * "drop" is freed.
261 */
262static void nfs4_swap_callback_idents(struct nfs_client *keep,
263 struct nfs_client *drop)
264{
265 struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id);
266 unsigned int save = keep->cl_cb_ident;
267
268 if (keep->cl_cb_ident == drop->cl_cb_ident)
269 return;
270
271 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
272 __func__, keep->cl_cb_ident, drop->cl_cb_ident);
273
274 spin_lock(&nn->nfs_client_lock);
275
276 idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident);
277 keep->cl_cb_ident = drop->cl_cb_ident;
278
279 idr_replace(&nn->cb_ident_idr, drop, save);
280 drop->cl_cb_ident = save;
281
282 spin_unlock(&nn->nfs_client_lock);
283}
284
285/**
286 * nfs40_walk_client_list - Find server that recognizes a client ID
287 *
288 * @new: nfs_client with client ID to test
289 * @result: OUT: found nfs_client, or new
290 * @cred: credential to use for trunking test
291 *
292 * Returns zero, a negative errno, or a negative NFS4ERR status.
293 * If zero is returned, an nfs_client pointer is planted in "result."
294 *
295 * NB: nfs40_walk_client_list() relies on the new nfs_client being
296 * the last nfs_client on the list.
297 */
298int nfs40_walk_client_list(struct nfs_client *new,
299 struct nfs_client **result,
300 struct rpc_cred *cred)
301{
302 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
303 struct nfs_client *pos, *n, *prev = NULL;
304 struct nfs4_setclientid_res clid = {
305 .clientid = new->cl_clientid,
306 .confirm = new->cl_confirm,
307 };
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500308 int status = -NFS4ERR_STALE_CLIENTID;
Chuck Lever05f4c352012-09-14 17:24:32 -0400309
310 spin_lock(&nn->nfs_client_lock);
311 list_for_each_entry_safe(pos, n, &nn->nfs_client_list, cl_share_link) {
312 /* If "pos" isn't marked ready, we can't trust the
313 * remaining fields in "pos" */
314 if (pos->cl_cons_state < NFS_CS_READY)
315 continue;
316
317 if (pos->rpc_ops != new->rpc_ops)
318 continue;
319
320 if (pos->cl_proto != new->cl_proto)
321 continue;
322
323 if (pos->cl_minorversion != new->cl_minorversion)
324 continue;
325
326 if (pos->cl_clientid != new->cl_clientid)
327 continue;
328
329 atomic_inc(&pos->cl_count);
330 spin_unlock(&nn->nfs_client_lock);
331
332 if (prev)
333 nfs_put_client(prev);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500334 prev = pos;
Chuck Lever05f4c352012-09-14 17:24:32 -0400335
336 status = nfs4_proc_setclientid_confirm(pos, &clid, cred);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500337 switch (status) {
338 case -NFS4ERR_STALE_CLIENTID:
339 break;
340 case 0:
Chuck Lever05f4c352012-09-14 17:24:32 -0400341 nfs4_swap_callback_idents(pos, new);
342
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500343 prev = NULL;
Chuck Lever05f4c352012-09-14 17:24:32 -0400344 *result = pos;
345 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
346 __func__, pos, atomic_read(&pos->cl_count));
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500347 default:
348 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -0400349 }
350
351 spin_lock(&nn->nfs_client_lock);
Chuck Lever05f4c352012-09-14 17:24:32 -0400352 }
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500353 spin_unlock(&nn->nfs_client_lock);
Chuck Lever05f4c352012-09-14 17:24:32 -0400354
Trond Myklebust202c3122013-01-18 22:56:23 -0500355 /* No match found. The server lost our clientid */
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500356out:
Chuck Lever05f4c352012-09-14 17:24:32 -0400357 if (prev)
358 nfs_put_client(prev);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500359 dprintk("NFS: <-- %s status = %d\n", __func__, status);
360 return status;
Chuck Lever05f4c352012-09-14 17:24:32 -0400361}
362
363#ifdef CONFIG_NFS_V4_1
364/*
Trond Myklebustf9d640f2012-10-01 16:37:51 -0700365 * Returns true if the client IDs match
366 */
367static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b)
368{
369 if (a->cl_clientid != b->cl_clientid) {
370 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
371 __func__, a->cl_clientid, b->cl_clientid);
372 return false;
373 }
374 dprintk("NFS: --> %s client ID %llx matches %llx\n",
375 __func__, a->cl_clientid, b->cl_clientid);
376 return true;
377}
378
379/*
Chuck Lever05f4c352012-09-14 17:24:32 -0400380 * Returns true if the server owners match
381 */
382static bool
383nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b)
384{
385 struct nfs41_server_owner *o1 = a->cl_serverowner;
386 struct nfs41_server_owner *o2 = b->cl_serverowner;
387
388 if (o1->minor_id != o2->minor_id) {
389 dprintk("NFS: --> %s server owner minor IDs do not match\n",
390 __func__);
391 return false;
392 }
393
394 if (o1->major_id_sz != o2->major_id_sz)
395 goto out_major_mismatch;
396 if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0)
397 goto out_major_mismatch;
398
399 dprintk("NFS: --> %s server owners match\n", __func__);
400 return true;
401
402out_major_mismatch:
403 dprintk("NFS: --> %s server owner major IDs do not match\n",
404 __func__);
405 return false;
406}
407
408/**
409 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
410 *
411 * @new: nfs_client with client ID to test
412 * @result: OUT: found nfs_client, or new
413 * @cred: credential to use for trunking test
414 *
415 * Returns zero, a negative errno, or a negative NFS4ERR status.
416 * If zero is returned, an nfs_client pointer is planted in "result."
417 *
418 * NB: nfs41_walk_client_list() relies on the new nfs_client being
419 * the last nfs_client on the list.
420 */
421int nfs41_walk_client_list(struct nfs_client *new,
422 struct nfs_client **result,
423 struct rpc_cred *cred)
424{
425 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
426 struct nfs_client *pos, *n, *prev = NULL;
Trond Myklebust202c3122013-01-18 22:56:23 -0500427 int status = -NFS4ERR_STALE_CLIENTID;
Chuck Lever05f4c352012-09-14 17:24:32 -0400428
429 spin_lock(&nn->nfs_client_lock);
430 list_for_each_entry_safe(pos, n, &nn->nfs_client_list, cl_share_link) {
431 /* If "pos" isn't marked ready, we can't trust the
432 * remaining fields in "pos", especially the client
433 * ID and serverowner fields. Wait for CREATE_SESSION
434 * to finish. */
435 if (pos->cl_cons_state < NFS_CS_READY) {
436 atomic_inc(&pos->cl_count);
437 spin_unlock(&nn->nfs_client_lock);
438
439 if (prev)
440 nfs_put_client(prev);
441 prev = pos;
442
Trond Myklebust65436ec2013-01-18 23:01:43 -0500443 nfs4_schedule_lease_recovery(pos);
Trond Myklebust202c3122013-01-18 22:56:23 -0500444 status = nfs_wait_client_init_complete(pos);
445 if (status < 0) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400446 nfs_put_client(pos);
Chuck Leverc2ccc082012-10-02 09:18:12 -0700447 spin_lock(&nn->nfs_client_lock);
Chuck Lever05f4c352012-09-14 17:24:32 -0400448 continue;
449 }
Trond Myklebust65436ec2013-01-18 23:01:43 -0500450 status = pos->cl_cons_state;
Chuck Lever05f4c352012-09-14 17:24:32 -0400451 spin_lock(&nn->nfs_client_lock);
Trond Myklebust65436ec2013-01-18 23:01:43 -0500452 if (status < 0)
453 continue;
Chuck Lever05f4c352012-09-14 17:24:32 -0400454 }
455
456 if (pos->rpc_ops != new->rpc_ops)
457 continue;
458
459 if (pos->cl_proto != new->cl_proto)
460 continue;
461
462 if (pos->cl_minorversion != new->cl_minorversion)
463 continue;
464
465 if (!nfs4_match_clientids(pos, new))
466 continue;
467
468 if (!nfs4_match_serverowners(pos, new))
469 continue;
470
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500471 atomic_inc(&pos->cl_count);
Chuck Lever05f4c352012-09-14 17:24:32 -0400472 spin_unlock(&nn->nfs_client_lock);
473 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
474 __func__, pos, atomic_read(&pos->cl_count));
475
476 *result = pos;
477 return 0;
478 }
479
Trond Myklebust202c3122013-01-18 22:56:23 -0500480 /* No matching nfs_client found. */
Chuck Lever05f4c352012-09-14 17:24:32 -0400481 spin_unlock(&nn->nfs_client_lock);
Trond Myklebust202c3122013-01-18 22:56:23 -0500482 dprintk("NFS: <-- %s status = %d\n", __func__, status);
483 return status;
Chuck Lever05f4c352012-09-14 17:24:32 -0400484}
485#endif /* CONFIG_NFS_V4_1 */
486
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400487static void nfs4_destroy_server(struct nfs_server *server)
488{
489 nfs_server_return_all_delegations(server);
490 unset_pnfs_layoutdriver(server);
491 nfs4_purge_state_owners(server);
492}
493
494/*
495 * NFSv4.0 callback thread helper
496 *
497 * Find a client by callback identifier
498 */
499struct nfs_client *
500nfs4_find_client_ident(struct net *net, int cb_ident)
501{
502 struct nfs_client *clp;
503 struct nfs_net *nn = net_generic(net, nfs_net_id);
504
505 spin_lock(&nn->nfs_client_lock);
506 clp = idr_find(&nn->cb_ident_idr, cb_ident);
507 if (clp)
508 atomic_inc(&clp->cl_count);
509 spin_unlock(&nn->nfs_client_lock);
510 return clp;
511}
512
513#if defined(CONFIG_NFS_V4_1)
514/* Common match routine for v4.0 and v4.1 callback services */
515static bool nfs4_cb_match_client(const struct sockaddr *addr,
516 struct nfs_client *clp, u32 minorversion)
517{
518 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
519
520 /* Don't match clients that failed to initialise */
521 if (!(clp->cl_cons_state == NFS_CS_READY ||
522 clp->cl_cons_state == NFS_CS_SESSION_INITING))
523 return false;
524
525 smp_rmb();
526
527 /* Match the version and minorversion */
528 if (clp->rpc_ops->version != 4 ||
529 clp->cl_minorversion != minorversion)
530 return false;
531
532 /* Match only the IP address, not the port number */
533 if (!nfs_sockaddr_match_ipaddr(addr, clap))
534 return false;
535
536 return true;
537}
538
539/*
540 * NFSv4.1 callback thread helper
541 * For CB_COMPOUND calls, find a client by IP address, protocol version,
542 * minorversion, and sessionID
543 *
544 * Returns NULL if no such client
545 */
546struct nfs_client *
547nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
548 struct nfs4_sessionid *sid)
549{
550 struct nfs_client *clp;
551 struct nfs_net *nn = net_generic(net, nfs_net_id);
552
553 spin_lock(&nn->nfs_client_lock);
554 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
555 if (nfs4_cb_match_client(addr, clp, 1) == false)
556 continue;
557
558 if (!nfs4_has_session(clp))
559 continue;
560
561 /* Match sessionid*/
562 if (memcmp(clp->cl_session->sess_id.data,
563 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
564 continue;
565
566 atomic_inc(&clp->cl_count);
567 spin_unlock(&nn->nfs_client_lock);
568 return clp;
569 }
570 spin_unlock(&nn->nfs_client_lock);
571 return NULL;
572}
573
574#else /* CONFIG_NFS_V4_1 */
575
576struct nfs_client *
577nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
578 struct nfs4_sessionid *sid)
579{
580 return NULL;
581}
582#endif /* CONFIG_NFS_V4_1 */
583
584/*
585 * Set up an NFS4 client
586 */
587static int nfs4_set_client(struct nfs_server *server,
588 const char *hostname,
589 const struct sockaddr *addr,
590 const size_t addrlen,
591 const char *ip_addr,
592 rpc_authflavor_t authflavour,
593 int proto, const struct rpc_timeout *timeparms,
594 u32 minorversion, struct net *net)
595{
596 struct nfs_client_initdata cl_init = {
597 .hostname = hostname,
598 .addr = addr,
599 .addrlen = addrlen,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400600 .nfs_mod = &nfs_v4,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400601 .proto = proto,
602 .minorversion = minorversion,
603 .net = net,
604 };
605 struct nfs_client *clp;
606 int error;
607
608 dprintk("--> nfs4_set_client()\n");
609
610 if (server->flags & NFS_MOUNT_NORESVPORT)
611 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
612
613 /* Allocate or find a client reference we can use */
614 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
615 if (IS_ERR(clp)) {
616 error = PTR_ERR(clp);
617 goto error;
618 }
619
620 /*
621 * Query for the lease time on clientid setup or renewal
622 *
623 * Note that this will be set on nfs_clients that were created
624 * only for the DS role and did not set this bit, but now will
625 * serve a dual role.
626 */
627 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
628
629 server->nfs_client = clp;
630 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
631 return 0;
632error:
633 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
634 return error;
635}
636
637/*
638 * Set up a pNFS Data Server client.
639 *
640 * Return any existing nfs_client that matches server address,port,version
641 * and minorversion.
642 *
643 * For a new nfs_client, use a soft mount (default), a low retrans and a
644 * low timeout interval so that if a connection is lost, we retry through
645 * the MDS.
646 */
647struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
648 const struct sockaddr *ds_addr, int ds_addrlen,
649 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
650{
651 struct nfs_client_initdata cl_init = {
652 .addr = ds_addr,
653 .addrlen = ds_addrlen,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400654 .nfs_mod = &nfs_v4,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400655 .proto = ds_proto,
656 .minorversion = mds_clp->cl_minorversion,
657 .net = mds_clp->cl_net,
658 };
659 struct rpc_timeout ds_timeout;
660 struct nfs_client *clp;
661
662 /*
663 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
664 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
665 * (section 13.1 RFC 5661).
666 */
667 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
668 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
669 mds_clp->cl_rpcclient->cl_auth->au_flavor);
670
671 dprintk("<-- %s %p\n", __func__, clp);
672 return clp;
673}
674EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
675
676/*
677 * Session has been established, and the client marked ready.
678 * Set the mount rsize and wsize with negotiated fore channel
679 * attributes which will be bound checked in nfs_server_set_fsinfo.
680 */
681static void nfs4_session_set_rwsize(struct nfs_server *server)
682{
683#ifdef CONFIG_NFS_V4_1
684 struct nfs4_session *sess;
685 u32 server_resp_sz;
686 u32 server_rqst_sz;
687
688 if (!nfs4_has_session(server->nfs_client))
689 return;
690 sess = server->nfs_client->cl_session;
691 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
692 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
693
694 if (server->rsize > server_resp_sz)
695 server->rsize = server_resp_sz;
696 if (server->wsize > server_rqst_sz)
697 server->wsize = server_rqst_sz;
698#endif /* CONFIG_NFS_V4_1 */
699}
700
701static int nfs4_server_common_setup(struct nfs_server *server,
702 struct nfs_fh *mntfh)
703{
704 struct nfs_fattr *fattr;
705 int error;
706
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400707 /* data servers support only a subset of NFSv4.1 */
708 if (is_ds_only_client(server->nfs_client))
709 return -EPROTONOSUPPORT;
710
711 fattr = nfs_alloc_fattr();
712 if (fattr == NULL)
713 return -ENOMEM;
714
715 /* We must ensure the session is initialised first */
716 error = nfs4_init_session(server);
717 if (error < 0)
718 goto out;
719
Trond Myklebust39c6daa2013-03-15 16:11:57 -0400720 /* Set the basic capabilities */
721 server->caps |= server->nfs_client->cl_mvops->init_caps;
722 if (server->flags & NFS_MOUNT_NORDIRPLUS)
723 server->caps &= ~NFS_CAP_READDIRPLUS;
724 /*
725 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
726 * authentication.
727 */
728 if (nfs4_disable_idmapping &&
729 server->client->cl_auth->au_flavor == RPC_AUTH_UNIX)
730 server->caps |= NFS_CAP_UIDGID_NOMAP;
731
732
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400733 /* Probe the root fh to retrieve its FSID and filehandle */
734 error = nfs4_get_rootfh(server, mntfh);
735 if (error < 0)
736 goto out;
737
738 dprintk("Server FSID: %llx:%llx\n",
739 (unsigned long long) server->fsid.major,
740 (unsigned long long) server->fsid.minor);
741 dprintk("Mount FH: %d\n", mntfh->size);
742
743 nfs4_session_set_rwsize(server);
744
745 error = nfs_probe_fsinfo(server, mntfh, fattr);
746 if (error < 0)
747 goto out;
748
749 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
750 server->namelen = NFS4_MAXNAMLEN;
751
752 nfs_server_insert_lists(server);
753 server->mount_time = jiffies;
754 server->destroy = nfs4_destroy_server;
755out:
756 nfs_free_fattr(fattr);
757 return error;
758}
759
760/*
761 * Create a version 4 volume record
762 */
763static int nfs4_init_server(struct nfs_server *server,
764 const struct nfs_parsed_mount_data *data)
765{
766 struct rpc_timeout timeparms;
767 int error;
768
769 dprintk("--> nfs4_init_server()\n");
770
771 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
772 data->timeo, data->retrans);
773
774 /* Initialise the client representation from the mount data */
775 server->flags = data->flags;
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400776 server->options = data->options;
777
778 /* Get a client record */
779 error = nfs4_set_client(server,
780 data->nfs_server.hostname,
781 (const struct sockaddr *)&data->nfs_server.address,
782 data->nfs_server.addrlen,
783 data->client_address,
784 data->auth_flavors[0],
785 data->nfs_server.protocol,
786 &timeparms,
787 data->minorversion,
788 data->net);
789 if (error < 0)
790 goto error;
791
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400792 if (data->rsize)
793 server->rsize = nfs_block_size(data->rsize, NULL);
794 if (data->wsize)
795 server->wsize = nfs_block_size(data->wsize, NULL);
796
797 server->acregmin = data->acregmin * HZ;
798 server->acregmax = data->acregmax * HZ;
799 server->acdirmin = data->acdirmin * HZ;
800 server->acdirmax = data->acdirmax * HZ;
801
802 server->port = data->nfs_server.port;
803
804 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
805
806error:
807 /* Done */
808 dprintk("<-- nfs4_init_server() = %d\n", error);
809 return error;
810}
811
812/*
813 * Create a version 4 volume record
814 * - keyed on server and FSID
815 */
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400816/*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
817 struct nfs_fh *mntfh)*/
818struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
819 struct nfs_subversion *nfs_mod)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400820{
821 struct nfs_server *server;
822 int error;
823
824 dprintk("--> nfs4_create_server()\n");
825
826 server = nfs_alloc_server();
827 if (!server)
828 return ERR_PTR(-ENOMEM);
829
830 /* set up the general RPC client */
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400831 error = nfs4_init_server(server, mount_info->parsed);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400832 if (error < 0)
833 goto error;
834
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400835 error = nfs4_server_common_setup(server, mount_info->mntfh);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400836 if (error < 0)
837 goto error;
838
839 dprintk("<-- nfs4_create_server() = %p\n", server);
840 return server;
841
842error:
843 nfs_free_server(server);
844 dprintk("<-- nfs4_create_server() = error %d\n", error);
845 return ERR_PTR(error);
846}
847
848/*
849 * Create an NFS4 referral server record
850 */
851struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
852 struct nfs_fh *mntfh)
853{
854 struct nfs_client *parent_client;
855 struct nfs_server *server, *parent_server;
856 int error;
857
858 dprintk("--> nfs4_create_referral_server()\n");
859
860 server = nfs_alloc_server();
861 if (!server)
862 return ERR_PTR(-ENOMEM);
863
864 parent_server = NFS_SB(data->sb);
865 parent_client = parent_server->nfs_client;
866
867 /* Initialise the client representation from the parent server */
868 nfs_server_copy_userdata(server, parent_server);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400869
870 /* Get a client representation.
871 * Note: NFSv4 always uses TCP, */
872 error = nfs4_set_client(server, data->hostname,
873 data->addr,
874 data->addrlen,
875 parent_client->cl_ipaddr,
876 data->authflavor,
877 rpc_protocol(parent_server->client),
878 parent_server->client->cl_timeout,
879 parent_client->cl_mvops->minor_version,
880 parent_client->cl_net);
881 if (error < 0)
882 goto error;
883
884 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
885 if (error < 0)
886 goto error;
887
888 error = nfs4_server_common_setup(server, mntfh);
889 if (error < 0)
890 goto error;
891
892 dprintk("<-- nfs_create_referral_server() = %p\n", server);
893 return server;
894
895error:
896 nfs_free_server(server);
897 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
898 return ERR_PTR(error);
899}