blob: cd3b7cfdde16ae0e16cc17fbc9389ffc60eb511a [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>
Bryan Schumakerfcf10392012-07-16 16:39:18 -04007#include <linux/nfs_mount.h>
Jeff Layton59766872013-02-04 12:50:00 -05008#include <linux/sunrpc/addr.h>
Bryan Schumaker428360d2012-07-16 16:39:17 -04009#include <linux/sunrpc/auth.h>
10#include <linux/sunrpc/xprt.h>
11#include <linux/sunrpc/bc_xprt.h>
Jeff Layton6aa23d72013-11-14 07:25:19 -050012#include <linux/sunrpc/rpc_pipe_fs.h>
Bryan Schumaker428360d2012-07-16 16:39:17 -040013#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"
Anna Schumaker40c64c22015-04-15 13:00:05 -040017#include "nfs4idmap.h"
Bryan Schumakerfcf10392012-07-16 16:39:18 -040018#include "pnfs.h"
19#include "netns.h"
Bryan Schumaker428360d2012-07-16 16:39:17 -040020
21#define NFSDBG_FACILITY NFSDBG_CLIENT
22
23/*
Bryan Schumakerec409892012-07-16 16:39:21 -040024 * Get a unique NFSv4.0 callback identifier which will be used
25 * by the V4.0 callback service to lookup the nfs_client struct
26 */
27static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
28{
29 int ret = 0;
30 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
31
32 if (clp->rpc_ops->version != 4 || minorversion != 0)
33 return ret;
Tejun Heod6870312013-02-27 17:05:01 -080034 idr_preload(GFP_KERNEL);
Bryan Schumakerec409892012-07-16 16:39:21 -040035 spin_lock(&nn->nfs_client_lock);
Benjamin Coddingtonc68a0272015-11-20 09:56:20 -050036 ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT);
Tejun Heod6870312013-02-27 17:05:01 -080037 if (ret >= 0)
38 clp->cl_cb_ident = ret;
Bryan Schumakerec409892012-07-16 16:39:21 -040039 spin_unlock(&nn->nfs_client_lock);
Tejun Heod6870312013-02-27 17:05:01 -080040 idr_preload_end();
41 return ret < 0 ? ret : 0;
Bryan Schumakerec409892012-07-16 16:39:21 -040042}
43
44#ifdef CONFIG_NFS_V4_1
Andy Adamson0e201622013-09-06 14:14:00 -040045/**
46 * Per auth flavor data server rpc clients
47 */
48struct nfs4_ds_server {
49 struct list_head list; /* ds_clp->cl_ds_clients */
50 struct rpc_clnt *rpc_clnt;
51};
52
53/**
54 * Common lookup case for DS I/O
55 */
56static struct nfs4_ds_server *
57nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor)
58{
59 struct nfs4_ds_server *dss;
60
61 rcu_read_lock();
62 list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) {
63 if (dss->rpc_clnt->cl_auth->au_flavor != flavor)
64 continue;
65 goto out;
66 }
67 dss = NULL;
68out:
69 rcu_read_unlock();
70 return dss;
71}
72
73static struct nfs4_ds_server *
74nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor,
75 struct nfs4_ds_server *new)
76{
77 struct nfs4_ds_server *dss;
78
79 spin_lock(&ds_clp->cl_lock);
80 list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) {
81 if (dss->rpc_clnt->cl_auth->au_flavor != flavor)
82 continue;
83 goto out;
84 }
85 if (new)
86 list_add_rcu(&new->list, &ds_clp->cl_ds_clients);
87 dss = new;
88out:
89 spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */
90 return dss;
91}
92
93static struct nfs4_ds_server *
94nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor)
95{
96 struct nfs4_ds_server *dss;
97
98 dss = kmalloc(sizeof(*dss), GFP_NOFS);
99 if (dss == NULL)
100 return ERR_PTR(-ENOMEM);
101
102 dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor);
103 if (IS_ERR(dss->rpc_clnt)) {
104 int err = PTR_ERR(dss->rpc_clnt);
105 kfree (dss);
106 return ERR_PTR(err);
107 }
108 INIT_LIST_HEAD(&dss->list);
109
110 return dss;
111}
112
113static void
114nfs4_free_ds_server(struct nfs4_ds_server *dss)
115{
116 rpc_release_client(dss->rpc_clnt);
117 kfree(dss);
118}
119
120/**
121* Find or create a DS rpc client with th MDS server rpc client auth flavor
122* in the nfs_client cl_ds_clients list.
123*/
124struct rpc_clnt *
125nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode)
126{
127 struct nfs4_ds_server *dss, *new;
128 rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor;
129
130 dss = nfs4_find_ds_client(ds_clp, flavor);
131 if (dss != NULL)
132 goto out;
133 new = nfs4_alloc_ds_server(ds_clp, flavor);
134 if (IS_ERR(new))
135 return ERR_CAST(new);
136 dss = nfs4_add_ds_client(ds_clp, flavor, new);
137 if (dss != new)
138 nfs4_free_ds_server(new);
139out:
140 return dss->rpc_clnt;
141}
142EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client);
143
144static void
145nfs4_shutdown_ds_clients(struct nfs_client *clp)
146{
147 struct nfs4_ds_server *dss;
148 LIST_HEAD(shutdown_list);
149
150 while (!list_empty(&clp->cl_ds_clients)) {
151 dss = list_entry(clp->cl_ds_clients.next,
152 struct nfs4_ds_server, list);
153 list_del(&dss->list);
154 rpc_shutdown_client(dss->rpc_clnt);
155 kfree (dss);
156 }
157}
158
Chuck Leverabf79bb2013-08-09 12:49:11 -0400159void nfs41_shutdown_client(struct nfs_client *clp)
Bryan Schumakerec409892012-07-16 16:39:21 -0400160{
161 if (nfs4_has_session(clp)) {
Andy Adamson0e201622013-09-06 14:14:00 -0400162 nfs4_shutdown_ds_clients(clp);
Bryan Schumakerec409892012-07-16 16:39:21 -0400163 nfs4_destroy_session(clp->cl_session);
164 nfs4_destroy_clientid(clp);
165 }
166
167}
Chuck Leverabf79bb2013-08-09 12:49:11 -0400168#endif /* CONFIG_NFS_V4_1 */
169
170void nfs40_shutdown_client(struct nfs_client *clp)
Bryan Schumakerec409892012-07-16 16:39:21 -0400171{
Chuck Leverabf79bb2013-08-09 12:49:11 -0400172 if (clp->cl_slot_tbl) {
Trond Myklebust20b9a902014-02-01 13:47:06 -0500173 nfs4_shutdown_slot_table(clp->cl_slot_tbl);
Chuck Leverabf79bb2013-08-09 12:49:11 -0400174 kfree(clp->cl_slot_tbl);
175 }
Bryan Schumakerec409892012-07-16 16:39:21 -0400176}
Bryan Schumakerec409892012-07-16 16:39:21 -0400177
178struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
179{
180 int err;
181 struct nfs_client *clp = nfs_alloc_client(cl_init);
182 if (IS_ERR(clp))
183 return clp;
184
185 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
186 if (err)
187 goto error;
188
Steve Dickson42c2c422013-05-22 12:50:38 -0400189 if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) {
190 err = -EINVAL;
191 goto error;
192 }
193
Bryan Schumakerec409892012-07-16 16:39:21 -0400194 spin_lock_init(&clp->cl_lock);
195 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
Andy Adamson0e201622013-09-06 14:14:00 -0400196 INIT_LIST_HEAD(&clp->cl_ds_clients);
Bryan Schumakerec409892012-07-16 16:39:21 -0400197 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
198 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
199 clp->cl_minorversion = cl_init->minorversion;
200 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
Chuck Leverc9fdeb22013-10-17 14:13:02 -0400201 clp->cl_mig_gen = 1;
Bryan Schumakerec409892012-07-16 16:39:21 -0400202 return clp;
203
204error:
Trond Myklebust7653f6f2012-08-20 12:12:29 -0400205 nfs_free_client(clp);
Bryan Schumakerec409892012-07-16 16:39:21 -0400206 return ERR_PTR(err);
207}
208
209/*
210 * Destroy the NFS4 callback service
211 */
212static void nfs4_destroy_callback(struct nfs_client *clp)
213{
214 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
Stanislav Kinsburskyc9465562012-08-20 18:00:16 +0400215 nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net);
Bryan Schumakerec409892012-07-16 16:39:21 -0400216}
217
218static void nfs4_shutdown_client(struct nfs_client *clp)
219{
220 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
221 nfs4_kill_renewd(clp);
Chuck Leverabf79bb2013-08-09 12:49:11 -0400222 clp->cl_mvops->shutdown_client(clp);
Bryan Schumakerec409892012-07-16 16:39:21 -0400223 nfs4_destroy_callback(clp);
224 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
225 nfs_idmap_delete(clp);
226
227 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
228 kfree(clp->cl_serverowner);
229 kfree(clp->cl_serverscope);
230 kfree(clp->cl_implid);
Trond Myklebustceb3a162015-01-03 15:16:04 -0500231 kfree(clp->cl_owner_id);
Bryan Schumakerec409892012-07-16 16:39:21 -0400232}
233
234void nfs4_free_client(struct nfs_client *clp)
235{
236 nfs4_shutdown_client(clp);
237 nfs_free_client(clp);
238}
239
240/*
Bryan Schumaker428360d2012-07-16 16:39:17 -0400241 * Initialize the NFS4 callback service
242 */
243static int nfs4_init_callback(struct nfs_client *clp)
244{
Chuck Leverc2ef47b2014-11-08 20:15:26 -0500245 struct rpc_xprt *xprt;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400246 int error;
247
Chuck Leverc2ef47b2014-11-08 20:15:26 -0500248 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400249
Chuck Leverc2ef47b2014-11-08 20:15:26 -0500250 if (nfs4_has_session(clp)) {
251 error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
252 if (error < 0)
Bryan Schumaker428360d2012-07-16 16:39:17 -0400253 return error;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400254 }
Chuck Leverc2ef47b2014-11-08 20:15:26 -0500255
256 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
257 if (error < 0) {
258 dprintk("%s: failed to start callback. Error = %d\n",
259 __func__, error);
260 return error;
261 }
262 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
263
Bryan Schumaker428360d2012-07-16 16:39:17 -0400264 return 0;
265}
266
Chuck Leverabf79bb2013-08-09 12:49:11 -0400267/**
268 * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
269 * @clp - nfs_client to initialize
270 *
271 * Returns zero on success, or a negative errno if some error occurred.
272 */
273int nfs40_init_client(struct nfs_client *clp)
274{
275 struct nfs4_slot_table *tbl;
276 int ret;
277
278 tbl = kzalloc(sizeof(*tbl), GFP_NOFS);
279 if (tbl == NULL)
280 return -ENOMEM;
281
282 ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE,
283 "NFSv4.0 transport Slot table");
284 if (ret) {
285 kfree(tbl);
286 return ret;
287 }
288
289 clp->cl_slot_tbl = tbl;
290 return 0;
291}
292
293#if defined(CONFIG_NFS_V4_1)
294
295/**
296 * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
297 * @clp - nfs_client to initialize
298 *
299 * Returns zero on success, or a negative errno if some error occurred.
300 */
301int nfs41_init_client(struct nfs_client *clp)
302{
303 struct nfs4_session *session = NULL;
304
305 /*
306 * Create the session and mark it expired.
307 * When a SEQUENCE operation encounters the expired session
308 * it will do session recovery to initialize it.
309 */
310 session = nfs4_alloc_session(clp);
311 if (!session)
312 return -ENOMEM;
313
314 clp->cl_session = session;
315
316 /*
317 * The create session reply races with the server back
318 * channel probe. Mark the client NFS_CS_SESSION_INITING
319 * so that the client back channel can find the
320 * nfs_client struct
321 */
322 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
323 return 0;
324}
325
326#endif /* CONFIG_NFS_V4_1 */
327
Bryan Schumaker428360d2012-07-16 16:39:17 -0400328/*
329 * Initialize the minor version specific parts of an NFS4 client record
330 */
331static int nfs4_init_client_minor_version(struct nfs_client *clp)
332{
Chuck Leverabf79bb2013-08-09 12:49:11 -0400333 int ret;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400334
Chuck Leverabf79bb2013-08-09 12:49:11 -0400335 ret = clp->cl_mvops->init_client(clp);
336 if (ret)
337 return ret;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400338 return nfs4_init_callback(clp);
339}
340
341/**
342 * nfs4_init_client - Initialise an NFS4 client record
343 *
344 * @clp: nfs_client to initialise
345 * @timeparms: timeout parameters for underlying RPC transport
346 * @ip_addr: callback IP address in presentation format
347 * @authflavor: authentication flavor for underlying RPC transport
348 *
349 * Returns pointer to an NFS client, or an ERR_PTR value.
350 */
351struct nfs_client *nfs4_init_client(struct nfs_client *clp,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400352 const struct nfs_client_initdata *cl_init)
Bryan Schumaker428360d2012-07-16 16:39:17 -0400353{
354 char buf[INET6_ADDRSTRLEN + 1];
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400355 const char *ip_addr = cl_init->ip_addr;
Chuck Lever05f4c352012-09-14 17:24:32 -0400356 struct nfs_client *old;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400357 int error;
358
359 if (clp->cl_cons_state == NFS_CS_READY) {
360 /* the client is initialised already */
361 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
362 return clp;
363 }
364
365 /* Check NFS protocol revision and initialize RPC op vector */
366 clp->rpc_ops = &nfs_v4_clientops;
367
Trond Myklebust98f98cf2013-04-14 11:49:51 -0400368 if (clp->cl_minorversion != 0)
369 __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400370 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
Trond Myklebust99875242013-09-24 12:06:07 -0400371 __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags);
Jeff Layton6aa23d72013-11-14 07:25:19 -0500372
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400373 error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I);
Trond Myklebust23631222013-04-04 16:14:11 -0400374 if (error == -EINVAL)
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400375 error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400376 if (error < 0)
377 goto error;
378
379 /* If no clientaddr= option was specified, find a usable cb address */
380 if (ip_addr == NULL) {
381 struct sockaddr_storage cb_addr;
382 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
383
384 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
385 if (error < 0)
386 goto error;
387 error = rpc_ntop(sap, buf, sizeof(buf));
388 if (error < 0)
389 goto error;
390 ip_addr = (const char *)buf;
391 }
392 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
393
394 error = nfs_idmap_new(clp);
395 if (error < 0) {
396 dprintk("%s: failed to create idmapper. Error = %d\n",
397 __func__, error);
398 goto error;
399 }
400 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
401
402 error = nfs4_init_client_minor_version(clp);
403 if (error < 0)
404 goto error;
405
406 if (!nfs4_has_session(clp))
407 nfs_mark_client_ready(clp, NFS_CS_READY);
Chuck Lever05f4c352012-09-14 17:24:32 -0400408
409 error = nfs4_discover_server_trunking(clp, &old);
410 if (error < 0)
411 goto error;
Chuck Lever05f4c352012-09-14 17:24:32 -0400412
Weston Andros Adamsonabad2fa2014-01-19 22:45:36 -0500413 if (clp != old)
414 clp->cl_preserve_clid = true;
415 nfs_put_client(clp);
416 return old;
Bryan Schumaker428360d2012-07-16 16:39:17 -0400417
418error:
419 nfs_mark_client_ready(clp, error);
420 nfs_put_client(clp);
421 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
422 return ERR_PTR(error);
423}
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400424
Chuck Lever05f4c352012-09-14 17:24:32 -0400425/*
Chuck Lever05f4c352012-09-14 17:24:32 -0400426 * SETCLIENTID just did a callback update with the callback ident in
427 * "drop," but server trunking discovery claims "drop" and "keep" are
428 * actually the same server. Swap the callback IDs so that "keep"
429 * will continue to use the callback ident the server now knows about,
430 * and so that "keep"'s original callback ident is destroyed when
431 * "drop" is freed.
432 */
433static void nfs4_swap_callback_idents(struct nfs_client *keep,
434 struct nfs_client *drop)
435{
436 struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id);
437 unsigned int save = keep->cl_cb_ident;
438
439 if (keep->cl_cb_ident == drop->cl_cb_ident)
440 return;
441
442 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
443 __func__, keep->cl_cb_ident, drop->cl_cb_ident);
444
445 spin_lock(&nn->nfs_client_lock);
446
447 idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident);
448 keep->cl_cb_ident = drop->cl_cb_ident;
449
450 idr_replace(&nn->cb_ident_idr, drop, save);
451 drop->cl_cb_ident = save;
452
453 spin_unlock(&nn->nfs_client_lock);
454}
455
Trond Myklebust55b9df92015-01-03 15:35:27 -0500456static bool nfs4_match_client_owner_id(const struct nfs_client *clp1,
457 const struct nfs_client *clp2)
458{
459 if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL)
460 return true;
461 return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0;
462}
463
Chuck Lever05f4c352012-09-14 17:24:32 -0400464/**
465 * nfs40_walk_client_list - Find server that recognizes a client ID
466 *
467 * @new: nfs_client with client ID to test
468 * @result: OUT: found nfs_client, or new
469 * @cred: credential to use for trunking test
470 *
471 * Returns zero, a negative errno, or a negative NFS4ERR status.
472 * If zero is returned, an nfs_client pointer is planted in "result."
473 *
474 * NB: nfs40_walk_client_list() relies on the new nfs_client being
475 * the last nfs_client on the list.
476 */
477int nfs40_walk_client_list(struct nfs_client *new,
478 struct nfs_client **result,
479 struct rpc_cred *cred)
480{
481 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400482 struct nfs_client *pos, *prev = NULL;
Chuck Lever05f4c352012-09-14 17:24:32 -0400483 struct nfs4_setclientid_res clid = {
484 .clientid = new->cl_clientid,
485 .confirm = new->cl_confirm,
486 };
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500487 int status = -NFS4ERR_STALE_CLIENTID;
Chuck Lever05f4c352012-09-14 17:24:32 -0400488
489 spin_lock(&nn->nfs_client_lock);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400490 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
Steve Dickson080af202014-09-18 09:13:17 -0400491
492 if (pos->rpc_ops != new->rpc_ops)
493 continue;
494
Steve Dickson080af202014-09-18 09:13:17 -0400495 if (pos->cl_minorversion != new->cl_minorversion)
496 continue;
497
Chuck Lever05f4c352012-09-14 17:24:32 -0400498 /* If "pos" isn't marked ready, we can't trust the
499 * remaining fields in "pos" */
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400500 if (pos->cl_cons_state > NFS_CS_READY) {
501 atomic_inc(&pos->cl_count);
502 spin_unlock(&nn->nfs_client_lock);
503
Markus Elfringfe0bf112014-11-18 13:23:43 +0100504 nfs_put_client(prev);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400505 prev = pos;
506
507 status = nfs_wait_client_init_complete(pos);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400508 if (status < 0)
Trond Myklebust64590da2014-01-17 17:03:41 -0500509 goto out;
510 status = -NFS4ERR_STALE_CLIENTID;
511 spin_lock(&nn->nfs_client_lock);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400512 }
513 if (pos->cl_cons_state != NFS_CS_READY)
Chuck Lever05f4c352012-09-14 17:24:32 -0400514 continue;
515
Chuck Lever05f4c352012-09-14 17:24:32 -0400516 if (pos->cl_clientid != new->cl_clientid)
517 continue;
518
Trond Myklebust55b9df92015-01-03 15:35:27 -0500519 if (!nfs4_match_client_owner_id(pos, new))
520 continue;
521
Chuck Lever05f4c352012-09-14 17:24:32 -0400522 atomic_inc(&pos->cl_count);
523 spin_unlock(&nn->nfs_client_lock);
524
Markus Elfringfe0bf112014-11-18 13:23:43 +0100525 nfs_put_client(prev);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500526 prev = pos;
Chuck Lever05f4c352012-09-14 17:24:32 -0400527
528 status = nfs4_proc_setclientid_confirm(pos, &clid, cred);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500529 switch (status) {
530 case -NFS4ERR_STALE_CLIENTID:
531 break;
532 case 0:
Chuck Lever05f4c352012-09-14 17:24:32 -0400533 nfs4_swap_callback_idents(pos, new);
534
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500535 prev = NULL;
Chuck Lever05f4c352012-09-14 17:24:32 -0400536 *result = pos;
537 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
538 __func__, pos, atomic_read(&pos->cl_count));
Trond Myklebustf9b7ebd2014-03-18 14:11:24 -0400539 goto out;
540 case -ERESTARTSYS:
541 case -ETIMEDOUT:
542 /* The callback path may have been inadvertently
543 * changed. Schedule recovery!
544 */
545 nfs4_schedule_path_down_recovery(pos);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500546 default:
547 goto out;
Chuck Lever05f4c352012-09-14 17:24:32 -0400548 }
549
550 spin_lock(&nn->nfs_client_lock);
Chuck Lever05f4c352012-09-14 17:24:32 -0400551 }
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500552 spin_unlock(&nn->nfs_client_lock);
Chuck Lever05f4c352012-09-14 17:24:32 -0400553
Trond Myklebust202c3122013-01-18 22:56:23 -0500554 /* No match found. The server lost our clientid */
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500555out:
Markus Elfringfe0bf112014-11-18 13:23:43 +0100556 nfs_put_client(prev);
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500557 dprintk("NFS: <-- %s status = %d\n", __func__, status);
558 return status;
Chuck Lever05f4c352012-09-14 17:24:32 -0400559}
560
561#ifdef CONFIG_NFS_V4_1
562/*
Trond Myklebustf9d640f2012-10-01 16:37:51 -0700563 * Returns true if the client IDs match
564 */
565static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b)
566{
567 if (a->cl_clientid != b->cl_clientid) {
568 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
569 __func__, a->cl_clientid, b->cl_clientid);
570 return false;
571 }
572 dprintk("NFS: --> %s client ID %llx matches %llx\n",
573 __func__, a->cl_clientid, b->cl_clientid);
574 return true;
575}
576
577/*
Trond Myklebust1fc07032015-01-02 16:25:08 -0500578 * Returns true if the server major ids match
Chuck Lever05f4c352012-09-14 17:24:32 -0400579 */
580static bool
Trond Myklebust1fc07032015-01-02 16:25:08 -0500581nfs4_check_clientid_trunking(struct nfs_client *a, struct nfs_client *b)
Chuck Lever05f4c352012-09-14 17:24:32 -0400582{
583 struct nfs41_server_owner *o1 = a->cl_serverowner;
584 struct nfs41_server_owner *o2 = b->cl_serverowner;
585
Chuck Lever05f4c352012-09-14 17:24:32 -0400586 if (o1->major_id_sz != o2->major_id_sz)
587 goto out_major_mismatch;
588 if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0)
589 goto out_major_mismatch;
590
591 dprintk("NFS: --> %s server owners match\n", __func__);
592 return true;
593
594out_major_mismatch:
595 dprintk("NFS: --> %s server owner major IDs do not match\n",
596 __func__);
597 return false;
598}
599
600/**
601 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
602 *
603 * @new: nfs_client with client ID to test
604 * @result: OUT: found nfs_client, or new
605 * @cred: credential to use for trunking test
606 *
607 * Returns zero, a negative errno, or a negative NFS4ERR status.
608 * If zero is returned, an nfs_client pointer is planted in "result."
609 *
610 * NB: nfs41_walk_client_list() relies on the new nfs_client being
611 * the last nfs_client on the list.
612 */
613int nfs41_walk_client_list(struct nfs_client *new,
614 struct nfs_client **result,
615 struct rpc_cred *cred)
616{
617 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400618 struct nfs_client *pos, *prev = NULL;
Trond Myklebust202c3122013-01-18 22:56:23 -0500619 int status = -NFS4ERR_STALE_CLIENTID;
Chuck Lever05f4c352012-09-14 17:24:32 -0400620
621 spin_lock(&nn->nfs_client_lock);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400622 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
Steve Dickson080af202014-09-18 09:13:17 -0400623
Trond Myklebust48d66b92015-03-03 20:28:59 -0500624 if (pos == new)
625 goto found;
626
Steve Dickson080af202014-09-18 09:13:17 -0400627 if (pos->rpc_ops != new->rpc_ops)
628 continue;
629
Steve Dickson080af202014-09-18 09:13:17 -0400630 if (pos->cl_minorversion != new->cl_minorversion)
631 continue;
632
Chuck Lever05f4c352012-09-14 17:24:32 -0400633 /* If "pos" isn't marked ready, we can't trust the
634 * remaining fields in "pos", especially the client
635 * ID and serverowner fields. Wait for CREATE_SESSION
636 * to finish. */
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400637 if (pos->cl_cons_state > NFS_CS_READY) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400638 atomic_inc(&pos->cl_count);
639 spin_unlock(&nn->nfs_client_lock);
640
Markus Elfringfe0bf112014-11-18 13:23:43 +0100641 nfs_put_client(prev);
Chuck Lever05f4c352012-09-14 17:24:32 -0400642 prev = pos;
643
Trond Myklebust202c3122013-01-18 22:56:23 -0500644 status = nfs_wait_client_init_complete(pos);
Chuck Lever05f4c352012-09-14 17:24:32 -0400645 spin_lock(&nn->nfs_client_lock);
Trond Myklebust65436ec2013-01-18 23:01:43 -0500646 if (status < 0)
Trond Myklebust64590da2014-01-17 17:03:41 -0500647 break;
648 status = -NFS4ERR_STALE_CLIENTID;
Chuck Lever05f4c352012-09-14 17:24:32 -0400649 }
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400650 if (pos->cl_cons_state != NFS_CS_READY)
651 continue;
Chuck Lever05f4c352012-09-14 17:24:32 -0400652
Chuck Lever05f4c352012-09-14 17:24:32 -0400653 if (!nfs4_match_clientids(pos, new))
654 continue;
655
Trond Myklebust1fc07032015-01-02 16:25:08 -0500656 /*
657 * Note that session trunking is just a special subcase of
658 * client id trunking. In either case, we want to fall back
659 * to using the existing nfs_client.
660 */
661 if (!nfs4_check_clientid_trunking(pos, new))
Chuck Lever05f4c352012-09-14 17:24:32 -0400662 continue;
663
Trond Myklebust55b9df92015-01-03 15:35:27 -0500664 /* Unlike NFSv4.0, we know that NFSv4.1 always uses the
665 * uniform string, however someone might switch the
666 * uniquifier string on us.
667 */
668 if (!nfs4_match_client_owner_id(pos, new))
669 continue;
Trond Myklebust48d66b92015-03-03 20:28:59 -0500670found:
Trond Myklebust4ae19c22013-01-18 22:41:53 -0500671 atomic_inc(&pos->cl_count);
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400672 *result = pos;
Trond Myklebusteb04e0a2013-04-10 12:44:18 -0400673 status = 0;
Chuck Lever05f4c352012-09-14 17:24:32 -0400674 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
675 __func__, pos, atomic_read(&pos->cl_count));
Trond Myklebust7b1f1fd2013-04-05 16:11:11 -0400676 break;
Chuck Lever05f4c352012-09-14 17:24:32 -0400677 }
678
Chuck Lever05f4c352012-09-14 17:24:32 -0400679 spin_unlock(&nn->nfs_client_lock);
Trond Myklebust202c3122013-01-18 22:56:23 -0500680 dprintk("NFS: <-- %s status = %d\n", __func__, status);
Markus Elfringfe0bf112014-11-18 13:23:43 +0100681 nfs_put_client(prev);
Trond Myklebust202c3122013-01-18 22:56:23 -0500682 return status;
Chuck Lever05f4c352012-09-14 17:24:32 -0400683}
684#endif /* CONFIG_NFS_V4_1 */
685
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400686static void nfs4_destroy_server(struct nfs_server *server)
687{
688 nfs_server_return_all_delegations(server);
689 unset_pnfs_layoutdriver(server);
690 nfs4_purge_state_owners(server);
691}
692
693/*
694 * NFSv4.0 callback thread helper
695 *
696 * Find a client by callback identifier
697 */
698struct nfs_client *
699nfs4_find_client_ident(struct net *net, int cb_ident)
700{
701 struct nfs_client *clp;
702 struct nfs_net *nn = net_generic(net, nfs_net_id);
703
704 spin_lock(&nn->nfs_client_lock);
705 clp = idr_find(&nn->cb_ident_idr, cb_ident);
706 if (clp)
707 atomic_inc(&clp->cl_count);
708 spin_unlock(&nn->nfs_client_lock);
709 return clp;
710}
711
712#if defined(CONFIG_NFS_V4_1)
713/* Common match routine for v4.0 and v4.1 callback services */
714static bool nfs4_cb_match_client(const struct sockaddr *addr,
715 struct nfs_client *clp, u32 minorversion)
716{
717 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
718
719 /* Don't match clients that failed to initialise */
720 if (!(clp->cl_cons_state == NFS_CS_READY ||
721 clp->cl_cons_state == NFS_CS_SESSION_INITING))
722 return false;
723
724 smp_rmb();
725
726 /* Match the version and minorversion */
727 if (clp->rpc_ops->version != 4 ||
728 clp->cl_minorversion != minorversion)
729 return false;
730
731 /* Match only the IP address, not the port number */
Anna Schumakerd8efa4e2015-07-13 14:01:28 -0400732 return rpc_cmp_addr(addr, clap);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400733}
734
735/*
736 * NFSv4.1 callback thread helper
737 * For CB_COMPOUND calls, find a client by IP address, protocol version,
738 * minorversion, and sessionID
739 *
740 * Returns NULL if no such client
741 */
742struct nfs_client *
743nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400744 struct nfs4_sessionid *sid, u32 minorversion)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400745{
746 struct nfs_client *clp;
747 struct nfs_net *nn = net_generic(net, nfs_net_id);
748
749 spin_lock(&nn->nfs_client_lock);
750 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400751 if (nfs4_cb_match_client(addr, clp, minorversion) == false)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400752 continue;
753
754 if (!nfs4_has_session(clp))
755 continue;
756
757 /* Match sessionid*/
758 if (memcmp(clp->cl_session->sess_id.data,
759 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
760 continue;
761
762 atomic_inc(&clp->cl_count);
763 spin_unlock(&nn->nfs_client_lock);
764 return clp;
765 }
766 spin_unlock(&nn->nfs_client_lock);
767 return NULL;
768}
769
770#else /* CONFIG_NFS_V4_1 */
771
772struct nfs_client *
773nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400774 struct nfs4_sessionid *sid, u32 minorversion)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400775{
776 return NULL;
777}
778#endif /* CONFIG_NFS_V4_1 */
779
780/*
781 * Set up an NFS4 client
782 */
783static int nfs4_set_client(struct nfs_server *server,
784 const char *hostname,
785 const struct sockaddr *addr,
786 const size_t addrlen,
787 const char *ip_addr,
788 rpc_authflavor_t authflavour,
789 int proto, const struct rpc_timeout *timeparms,
790 u32 minorversion, struct net *net)
791{
792 struct nfs_client_initdata cl_init = {
793 .hostname = hostname,
794 .addr = addr,
795 .addrlen = addrlen,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400796 .ip_addr = ip_addr,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400797 .nfs_mod = &nfs_v4,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400798 .proto = proto,
799 .minorversion = minorversion,
800 .net = net,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400801 .timeparms = timeparms,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400802 };
803 struct nfs_client *clp;
804 int error;
805
806 dprintk("--> nfs4_set_client()\n");
807
808 if (server->flags & NFS_MOUNT_NORESVPORT)
809 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
Chuck Leverf112bb42013-06-25 12:23:27 -0400810 if (server->options & NFS_OPTION_MIGRATION)
811 set_bit(NFS_CS_MIGRATION, &cl_init.init_flags);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400812
813 /* Allocate or find a client reference we can use */
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400814 clp = nfs_get_client(&cl_init, authflavour);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400815 if (IS_ERR(clp)) {
816 error = PTR_ERR(clp);
817 goto error;
818 }
819
Benjamin Coddington52442f92016-08-30 09:20:32 -0400820 if (server->nfs_client == clp) {
821 error = -ELOOP;
822 goto error;
823 }
824
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400825 /*
826 * Query for the lease time on clientid setup or renewal
827 *
828 * Note that this will be set on nfs_clients that were created
829 * only for the DS role and did not set this bit, but now will
830 * serve a dual role.
831 */
832 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
833
834 server->nfs_client = clp;
835 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
836 return 0;
837error:
838 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
839 return error;
840}
841
842/*
843 * Set up a pNFS Data Server client.
844 *
845 * Return any existing nfs_client that matches server address,port,version
846 * and minorversion.
847 *
848 * For a new nfs_client, use a soft mount (default), a low retrans and a
849 * low timeout interval so that if a connection is lost, we retry through
850 * the MDS.
851 */
Tigran Mkrtchyan3fc75f12016-06-13 19:57:35 +0200852struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400853 const struct sockaddr *ds_addr, int ds_addrlen,
Peng Tao064172f2014-05-29 21:07:00 +0800854 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
Peng Tao30626f92014-05-30 18:15:58 +0800855 u32 minor_version, rpc_authflavor_t au_flavor)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400856{
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400857 struct rpc_timeout ds_timeout;
Tigran Mkrtchyan3fc75f12016-06-13 19:57:35 +0200858 struct nfs_client *mds_clp = mds_srv->nfs_client;
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400859 struct nfs_client_initdata cl_init = {
860 .addr = ds_addr,
861 .addrlen = ds_addrlen,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400862 .nodename = mds_clp->cl_rpcclient->cl_nodename,
863 .ip_addr = mds_clp->cl_ipaddr,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400864 .nfs_mod = &nfs_v4,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400865 .proto = ds_proto,
Peng Tao30626f92014-05-30 18:15:58 +0800866 .minorversion = minor_version,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400867 .net = mds_clp->cl_net,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400868 .timeparms = &ds_timeout,
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400869 };
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400870 struct nfs_client *clp;
Peng Taoa363e322014-07-08 11:45:47 +0800871 char buf[INET6_ADDRSTRLEN + 1];
872
873 if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0)
874 return ERR_PTR(-EINVAL);
875 cl_init.hostname = buf;
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400876
Tigran Mkrtchyan3fc75f12016-06-13 19:57:35 +0200877 if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
878 __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
879
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400880 /*
881 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
882 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
883 * (section 13.1 RFC 5661).
884 */
885 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400886 clp = nfs_get_client(&cl_init, au_flavor);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400887
888 dprintk("<-- %s %p\n", __func__, clp);
889 return clp;
890}
891EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
892
893/*
894 * Session has been established, and the client marked ready.
895 * Set the mount rsize and wsize with negotiated fore channel
896 * attributes which will be bound checked in nfs_server_set_fsinfo.
897 */
898static void nfs4_session_set_rwsize(struct nfs_server *server)
899{
900#ifdef CONFIG_NFS_V4_1
901 struct nfs4_session *sess;
902 u32 server_resp_sz;
903 u32 server_rqst_sz;
904
905 if (!nfs4_has_session(server->nfs_client))
906 return;
907 sess = server->nfs_client->cl_session;
908 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
909 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
910
911 if (server->rsize > server_resp_sz)
912 server->rsize = server_resp_sz;
913 if (server->wsize > server_rqst_sz)
914 server->wsize = server_rqst_sz;
915#endif /* CONFIG_NFS_V4_1 */
916}
917
918static int nfs4_server_common_setup(struct nfs_server *server,
Trond Myklebust5e6b1992013-09-07 12:58:57 -0400919 struct nfs_fh *mntfh, bool auth_probe)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400920{
921 struct nfs_fattr *fattr;
922 int error;
923
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400924 /* data servers support only a subset of NFSv4.1 */
925 if (is_ds_only_client(server->nfs_client))
926 return -EPROTONOSUPPORT;
927
928 fattr = nfs_alloc_fattr();
929 if (fattr == NULL)
930 return -ENOMEM;
931
932 /* We must ensure the session is initialised first */
Andy Adamson18aad3d2013-06-26 12:21:49 -0400933 error = nfs4_init_session(server->nfs_client);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400934 if (error < 0)
935 goto out;
936
Trond Myklebust39c6daa2013-03-15 16:11:57 -0400937 /* Set the basic capabilities */
938 server->caps |= server->nfs_client->cl_mvops->init_caps;
939 if (server->flags & NFS_MOUNT_NORDIRPLUS)
940 server->caps &= ~NFS_CAP_READDIRPLUS;
941 /*
942 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
943 * authentication.
944 */
945 if (nfs4_disable_idmapping &&
946 server->client->cl_auth->au_flavor == RPC_AUTH_UNIX)
947 server->caps |= NFS_CAP_UIDGID_NOMAP;
948
949
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400950 /* Probe the root fh to retrieve its FSID and filehandle */
Trond Myklebust5e6b1992013-09-07 12:58:57 -0400951 error = nfs4_get_rootfh(server, mntfh, auth_probe);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400952 if (error < 0)
953 goto out;
954
955 dprintk("Server FSID: %llx:%llx\n",
956 (unsigned long long) server->fsid.major,
957 (unsigned long long) server->fsid.minor);
Chuck Lever9e6ee762013-10-17 14:12:45 -0400958 nfs_display_fhandle(mntfh, "Pseudo-fs root FH");
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400959
960 nfs4_session_set_rwsize(server);
961
962 error = nfs_probe_fsinfo(server, mntfh, fattr);
963 if (error < 0)
964 goto out;
965
966 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
967 server->namelen = NFS4_MAXNAMLEN;
968
969 nfs_server_insert_lists(server);
970 server->mount_time = jiffies;
971 server->destroy = nfs4_destroy_server;
972out:
973 nfs_free_fattr(fattr);
974 return error;
975}
976
977/*
978 * Create a version 4 volume record
979 */
980static int nfs4_init_server(struct nfs_server *server,
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400981 struct nfs_parsed_mount_data *data)
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400982{
983 struct rpc_timeout timeparms;
984 int error;
985
986 dprintk("--> nfs4_init_server()\n");
987
988 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
989 data->timeo, data->retrans);
990
991 /* Initialise the client representation from the mount data */
992 server->flags = data->flags;
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400993 server->options = data->options;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400994 server->auth_info = data->auth_info;
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400995
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -0400996 /* Use the first specified auth flavor. If this flavor isn't
997 * allowed by the server, use the SECINFO path to try the
998 * other specified flavors */
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400999 if (data->auth_info.flavor_len >= 1)
1000 data->selected_flavor = data->auth_info.flavors[0];
1001 else
1002 data->selected_flavor = RPC_AUTH_UNIX;
Trond Myklebust5e6b1992013-09-07 12:58:57 -04001003
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001004 /* Get a client record */
1005 error = nfs4_set_client(server,
1006 data->nfs_server.hostname,
1007 (const struct sockaddr *)&data->nfs_server.address,
1008 data->nfs_server.addrlen,
1009 data->client_address,
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001010 data->selected_flavor,
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001011 data->nfs_server.protocol,
1012 &timeparms,
1013 data->minorversion,
1014 data->net);
1015 if (error < 0)
1016 goto error;
1017
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001018 if (data->rsize)
1019 server->rsize = nfs_block_size(data->rsize, NULL);
1020 if (data->wsize)
1021 server->wsize = nfs_block_size(data->wsize, NULL);
1022
1023 server->acregmin = data->acregmin * HZ;
1024 server->acregmax = data->acregmax * HZ;
1025 server->acdirmin = data->acdirmin * HZ;
1026 server->acdirmax = data->acdirmax * HZ;
1027
1028 server->port = data->nfs_server.port;
1029
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001030 error = nfs_init_server_rpcclient(server, &timeparms,
1031 data->selected_flavor);
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001032
1033error:
1034 /* Done */
1035 dprintk("<-- nfs4_init_server() = %d\n", error);
1036 return error;
1037}
1038
1039/*
1040 * Create a version 4 volume record
1041 * - keyed on server and FSID
1042 */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001043/*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1044 struct nfs_fh *mntfh)*/
1045struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
1046 struct nfs_subversion *nfs_mod)
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001047{
1048 struct nfs_server *server;
Trond Myklebust5e6b1992013-09-07 12:58:57 -04001049 bool auth_probe;
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001050 int error;
1051
1052 dprintk("--> nfs4_create_server()\n");
1053
1054 server = nfs_alloc_server();
1055 if (!server)
1056 return ERR_PTR(-ENOMEM);
1057
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -04001058 auth_probe = mount_info->parsed->auth_info.flavor_len < 1;
Trond Myklebust5e6b1992013-09-07 12:58:57 -04001059
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001060 /* set up the general RPC client */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001061 error = nfs4_init_server(server, mount_info->parsed);
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001062 if (error < 0)
1063 goto error;
1064
Trond Myklebust5e6b1992013-09-07 12:58:57 -04001065 error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe);
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001066 if (error < 0)
1067 goto error;
1068
1069 dprintk("<-- nfs4_create_server() = %p\n", server);
1070 return server;
1071
1072error:
1073 nfs_free_server(server);
1074 dprintk("<-- nfs4_create_server() = error %d\n", error);
1075 return ERR_PTR(error);
1076}
1077
1078/*
1079 * Create an NFS4 referral server record
1080 */
1081struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1082 struct nfs_fh *mntfh)
1083{
1084 struct nfs_client *parent_client;
1085 struct nfs_server *server, *parent_server;
Weston Andros Adamson5837f6d2013-10-18 15:15:18 -04001086 bool auth_probe;
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001087 int error;
1088
1089 dprintk("--> nfs4_create_referral_server()\n");
1090
1091 server = nfs_alloc_server();
1092 if (!server)
1093 return ERR_PTR(-ENOMEM);
1094
1095 parent_server = NFS_SB(data->sb);
1096 parent_client = parent_server->nfs_client;
1097
1098 /* Initialise the client representation from the parent server */
1099 nfs_server_copy_userdata(server, parent_server);
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001100
1101 /* Get a client representation.
1102 * Note: NFSv4 always uses TCP, */
1103 error = nfs4_set_client(server, data->hostname,
1104 data->addr,
1105 data->addrlen,
1106 parent_client->cl_ipaddr,
1107 data->authflavor,
1108 rpc_protocol(parent_server->client),
1109 parent_server->client->cl_timeout,
1110 parent_client->cl_mvops->minor_version,
1111 parent_client->cl_net);
1112 if (error < 0)
1113 goto error;
1114
1115 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1116 if (error < 0)
1117 goto error;
1118
Weston Andros Adamson5837f6d2013-10-18 15:15:18 -04001119 auth_probe = parent_server->auth_info.flavor_len < 1;
1120
1121 error = nfs4_server_common_setup(server, mntfh, auth_probe);
Bryan Schumakerfcf10392012-07-16 16:39:18 -04001122 if (error < 0)
1123 goto error;
1124
1125 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1126 return server;
1127
1128error:
1129 nfs_free_server(server);
1130 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1131 return ERR_PTR(error);
1132}
Chuck Lever32e62b72013-10-17 14:12:28 -04001133
1134/*
1135 * Grab the destination's particulars, including lease expiry time.
1136 *
1137 * Returns zero if probe succeeded and retrieved FSID matches the FSID
1138 * we have cached.
1139 */
1140static int nfs_probe_destination(struct nfs_server *server)
1141{
David Howells2b0143b2015-03-17 22:25:59 +00001142 struct inode *inode = d_inode(server->super->s_root);
Chuck Lever32e62b72013-10-17 14:12:28 -04001143 struct nfs_fattr *fattr;
1144 int error;
1145
1146 fattr = nfs_alloc_fattr();
1147 if (fattr == NULL)
1148 return -ENOMEM;
1149
1150 /* Sanity: the probe won't work if the destination server
1151 * does not recognize the migrated FH. */
1152 error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr);
1153
1154 nfs_free_fattr(fattr);
1155 return error;
1156}
1157
1158/**
1159 * nfs4_update_server - Move an nfs_server to a different nfs_client
1160 *
1161 * @server: represents FSID to be moved
1162 * @hostname: new end-point's hostname
1163 * @sap: new end-point's socket address
1164 * @salen: size of "sap"
Trond Myklebust292f5032014-02-16 21:42:56 -05001165 * @net: net namespace
Chuck Lever32e62b72013-10-17 14:12:28 -04001166 *
1167 * The nfs_server must be quiescent before this function is invoked.
1168 * Either its session is drained (NFSv4.1+), or its transport is
1169 * plugged and drained (NFSv4.0).
1170 *
1171 * Returns zero on success, or a negative errno value.
1172 */
1173int nfs4_update_server(struct nfs_server *server, const char *hostname,
Trond Myklebust292f5032014-02-16 21:42:56 -05001174 struct sockaddr *sap, size_t salen, struct net *net)
Chuck Lever32e62b72013-10-17 14:12:28 -04001175{
1176 struct nfs_client *clp = server->nfs_client;
1177 struct rpc_clnt *clnt = server->client;
1178 struct xprt_create xargs = {
1179 .ident = clp->cl_proto,
Trond Myklebust292f5032014-02-16 21:42:56 -05001180 .net = net,
Chuck Lever32e62b72013-10-17 14:12:28 -04001181 .dstaddr = sap,
1182 .addrlen = salen,
1183 .servername = hostname,
1184 };
1185 char buf[INET6_ADDRSTRLEN + 1];
1186 struct sockaddr_storage address;
1187 struct sockaddr *localaddr = (struct sockaddr *)&address;
1188 int error;
1189
1190 dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__,
1191 (unsigned long long)server->fsid.major,
1192 (unsigned long long)server->fsid.minor,
1193 hostname);
1194
1195 error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout);
1196 if (error != 0) {
1197 dprintk("<-- %s(): rpc_switch_client_transport returned %d\n",
1198 __func__, error);
1199 goto out;
1200 }
1201
1202 error = rpc_localaddr(clnt, localaddr, sizeof(address));
1203 if (error != 0) {
1204 dprintk("<-- %s(): rpc_localaddr returned %d\n",
1205 __func__, error);
1206 goto out;
1207 }
1208
1209 error = -EAFNOSUPPORT;
1210 if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) {
1211 dprintk("<-- %s(): rpc_ntop returned %d\n",
1212 __func__, error);
1213 goto out;
1214 }
1215
1216 nfs_server_remove_lists(server);
1217 error = nfs4_set_client(server, hostname, sap, salen, buf,
1218 clp->cl_rpcclient->cl_auth->au_flavor,
1219 clp->cl_proto, clnt->cl_timeout,
Trond Myklebust292f5032014-02-16 21:42:56 -05001220 clp->cl_minorversion, net);
Chuck Lever32e62b72013-10-17 14:12:28 -04001221 nfs_put_client(clp);
1222 if (error != 0) {
1223 nfs_server_insert_lists(server);
1224 dprintk("<-- %s(): nfs4_set_client returned %d\n",
1225 __func__, error);
1226 goto out;
1227 }
1228
1229 if (server->nfs_client->cl_hostname == NULL)
1230 server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL);
1231 nfs_server_insert_lists(server);
1232
1233 error = nfs_probe_destination(server);
1234 if (error < 0)
1235 goto out;
1236
1237 dprintk("<-- %s() succeeded\n", __func__);
1238
1239out:
1240 return error;
1241}