blob: f2a092ca69b5649479698172795ffedc0bbf8219 [file] [log] [blame]
David Howells24c8dbb2006-08-22 20:06:10 -04001/* client.c: NFS client sharing and management code
2 *
3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12
David Howells24c8dbb2006-08-22 20:06:10 -040013#include <linux/module.h>
14#include <linux/init.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040015#include <linux/sched.h>
David Howells24c8dbb2006-08-22 20:06:10 -040016#include <linux/time.h>
17#include <linux/kernel.h>
18#include <linux/mm.h>
19#include <linux/string.h>
20#include <linux/stat.h>
21#include <linux/errno.h>
22#include <linux/unistd.h>
23#include <linux/sunrpc/clnt.h>
24#include <linux/sunrpc/stats.h>
25#include <linux/sunrpc/metrics.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040026#include <linux/sunrpc/xprtsock.h>
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -040027#include <linux/sunrpc/xprtrdma.h>
David Howells24c8dbb2006-08-22 20:06:10 -040028#include <linux/nfs_fs.h>
29#include <linux/nfs_mount.h>
30#include <linux/nfs4_mount.h>
31#include <linux/lockd/bind.h>
David Howells24c8dbb2006-08-22 20:06:10 -040032#include <linux/seq_file.h>
33#include <linux/mount.h>
34#include <linux/nfs_idmap.h>
35#include <linux/vfs.h>
36#include <linux/inet.h>
Trond Myklebust3b0d3f92008-01-03 13:28:58 -050037#include <linux/in6.h>
38#include <net/ipv6.h>
David Howells24c8dbb2006-08-22 20:06:10 -040039#include <linux/nfs_xdr.h>
40
41#include <asm/system.h>
42
43#include "nfs4_fs.h"
44#include "callback.h"
45#include "delegation.h"
46#include "iostat.h"
47#include "internal.h"
48
49#define NFSDBG_FACILITY NFSDBG_CLIENT
50
51static DEFINE_SPINLOCK(nfs_client_lock);
52static LIST_HEAD(nfs_client_list);
David Howells54ceac42006-08-22 20:06:13 -040053static LIST_HEAD(nfs_volume_list);
David Howells24c8dbb2006-08-22 20:06:10 -040054static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
55
56/*
David Howells5006a762006-08-22 20:06:12 -040057 * RPC cruft for NFS
58 */
59static struct rpc_version *nfs_version[5] = {
60 [2] = &nfs_version2,
61#ifdef CONFIG_NFS_V3
62 [3] = &nfs_version3,
63#endif
64#ifdef CONFIG_NFS_V4
65 [4] = &nfs_version4,
66#endif
67};
68
69struct rpc_program nfs_program = {
70 .name = "nfs",
71 .number = NFS_PROGRAM,
72 .nrvers = ARRAY_SIZE(nfs_version),
73 .version = nfs_version,
74 .stats = &nfs_rpcstat,
75 .pipe_dir_name = "/nfs",
76};
77
78struct rpc_stat nfs_rpcstat = {
79 .program = &nfs_program
80};
81
82
83#ifdef CONFIG_NFS_V3_ACL
84static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
85static struct rpc_version * nfsacl_version[] = {
86 [3] = &nfsacl_version3,
87};
88
89struct rpc_program nfsacl_program = {
90 .name = "nfsacl",
91 .number = NFS_ACL_PROGRAM,
92 .nrvers = ARRAY_SIZE(nfsacl_version),
93 .version = nfsacl_version,
94 .stats = &nfsacl_rpcstat,
95};
96#endif /* CONFIG_NFS_V3_ACL */
97
Trond Myklebust3a498022007-12-14 14:56:04 -050098struct nfs_client_initdata {
99 const char *hostname;
Chuck Leverd7422c42007-12-10 14:58:51 -0500100 const struct sockaddr *addr;
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500101 size_t addrlen;
Trond Myklebust40c553192007-12-14 14:56:07 -0500102 const struct nfs_rpc_ops *rpc_ops;
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500103 int proto;
Trond Myklebust3a498022007-12-14 14:56:04 -0500104};
105
David Howells5006a762006-08-22 20:06:12 -0400106/*
David Howells24c8dbb2006-08-22 20:06:10 -0400107 * Allocate a shared client record
108 *
109 * Since these are allocated/deallocated very rarely, we don't
110 * bother putting them in a slab cache...
111 */
Trond Myklebust3a498022007-12-14 14:56:04 -0500112static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400113{
114 struct nfs_client *clp;
Trond Myklebust7c67db32008-04-07 20:50:11 -0400115 struct rpc_cred *cred;
David Howells24c8dbb2006-08-22 20:06:10 -0400116
117 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
118 goto error_0;
119
Trond Myklebust40c553192007-12-14 14:56:07 -0500120 clp->rpc_ops = cl_init->rpc_ops;
121
122 if (cl_init->rpc_ops->version == 4) {
David Howells24c8dbb2006-08-22 20:06:10 -0400123 if (nfs_callback_up() < 0)
124 goto error_2;
125 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
126 }
127
128 atomic_set(&clp->cl_count, 1);
129 clp->cl_cons_state = NFS_CS_INITING;
130
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500131 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
132 clp->cl_addrlen = cl_init->addrlen;
David Howells24c8dbb2006-08-22 20:06:10 -0400133
Trond Myklebust3a498022007-12-14 14:56:04 -0500134 if (cl_init->hostname) {
135 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
David Howells24c8dbb2006-08-22 20:06:10 -0400136 if (!clp->cl_hostname)
137 goto error_3;
138 }
139
140 INIT_LIST_HEAD(&clp->cl_superblocks);
141 clp->cl_rpcclient = ERR_PTR(-EINVAL);
142
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500143 clp->cl_proto = cl_init->proto;
144
David Howells24c8dbb2006-08-22 20:06:10 -0400145#ifdef CONFIG_NFS_V4
146 init_rwsem(&clp->cl_sem);
147 INIT_LIST_HEAD(&clp->cl_delegations);
David Howells24c8dbb2006-08-22 20:06:10 -0400148 spin_lock_init(&clp->cl_lock);
David Howells65f27f32006-11-22 14:55:48 +0000149 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
David Howells24c8dbb2006-08-22 20:06:10 -0400150 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
151 clp->cl_boot_time = CURRENT_TIME;
152 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
153#endif
Trond Myklebust7c67db32008-04-07 20:50:11 -0400154 cred = rpc_lookup_machine_cred();
155 if (!IS_ERR(cred))
156 clp->cl_machine_cred = cred;
David Howells24c8dbb2006-08-22 20:06:10 -0400157
158 return clp;
159
160error_3:
Trond Myklebust9c5bf382006-08-22 20:06:14 -0400161 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
162 nfs_callback_down();
David Howells24c8dbb2006-08-22 20:06:10 -0400163error_2:
David Howells24c8dbb2006-08-22 20:06:10 -0400164 kfree(clp);
165error_0:
166 return NULL;
167}
168
Trond Myklebust5dd31772006-08-24 01:03:05 -0400169static void nfs4_shutdown_client(struct nfs_client *clp)
170{
171#ifdef CONFIG_NFS_V4
172 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
173 nfs4_kill_renewd(clp);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400174 BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners));
Trond Myklebust5dd31772006-08-24 01:03:05 -0400175 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
176 nfs_idmap_delete(clp);
Trond Myklebustf6a1cc82008-02-22 17:06:55 -0500177
178 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
Trond Myklebust5dd31772006-08-24 01:03:05 -0400179#endif
180}
181
David Howells24c8dbb2006-08-22 20:06:10 -0400182/*
183 * Destroy a shared client record
184 */
185static void nfs_free_client(struct nfs_client *clp)
186{
Trond Myklebust40c553192007-12-14 14:56:07 -0500187 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400188
Trond Myklebust5dd31772006-08-24 01:03:05 -0400189 nfs4_shutdown_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400190
191 /* -EIO all pending I/O */
192 if (!IS_ERR(clp->cl_rpcclient))
193 rpc_shutdown_client(clp->cl_rpcclient);
194
195 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
196 nfs_callback_down();
197
Trond Myklebust7c67db32008-04-07 20:50:11 -0400198 if (clp->cl_machine_cred != NULL)
199 put_rpccred(clp->cl_machine_cred);
200
David Howells24c8dbb2006-08-22 20:06:10 -0400201 kfree(clp->cl_hostname);
202 kfree(clp);
203
204 dprintk("<-- nfs_free_client()\n");
205}
206
207/*
208 * Release a reference to a shared client record
209 */
210void nfs_put_client(struct nfs_client *clp)
211{
David Howells27ba8512006-07-30 14:40:56 -0400212 if (!clp)
213 return;
214
David Howells24c8dbb2006-08-22 20:06:10 -0400215 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
216
217 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
218 list_del(&clp->cl_share_link);
219 spin_unlock(&nfs_client_lock);
220
221 BUG_ON(!list_empty(&clp->cl_superblocks));
222
223 nfs_free_client(clp);
224 }
225}
226
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500227static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1,
228 const struct sockaddr_in *sa2)
229{
230 return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr;
231}
232
233static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1,
234 const struct sockaddr_in6 *sa2)
235{
236 return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr);
237}
238
239static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
240 const struct sockaddr *sa2)
241{
242 switch (sa1->sa_family) {
243 case AF_INET:
244 return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1,
245 (const struct sockaddr_in *)sa2);
246 case AF_INET6:
247 return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1,
248 (const struct sockaddr_in6 *)sa2);
249 }
250 BUG();
251}
252
David Howells24c8dbb2006-08-22 20:06:10 -0400253/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500254 * Find a client by IP address and protocol version
255 * - returns NULL if no such client
David Howells24c8dbb2006-08-22 20:06:10 -0400256 */
Chuck Leverff052642007-12-10 14:58:44 -0500257struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
Trond Myklebustc81468a2007-12-14 14:56:05 -0500258{
259 struct nfs_client *clp;
260
261 spin_lock(&nfs_client_lock);
262 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500263 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
264
Trond Myklebustc81468a2007-12-14 14:56:05 -0500265 /* Don't match clients that failed to initialise properly */
266 if (clp->cl_cons_state != NFS_CS_READY)
267 continue;
268
269 /* Different NFS versions cannot share the same nfs_client */
Trond Myklebust40c553192007-12-14 14:56:07 -0500270 if (clp->rpc_ops->version != nfsversion)
Trond Myklebustc81468a2007-12-14 14:56:05 -0500271 continue;
272
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500273 if (addr->sa_family != clap->sa_family)
274 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500275 /* Match only the IP address, not the port number */
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500276 if (!nfs_sockaddr_match_ipaddr(addr, clap))
Trond Myklebustc81468a2007-12-14 14:56:05 -0500277 continue;
278
279 atomic_inc(&clp->cl_count);
280 spin_unlock(&nfs_client_lock);
281 return clp;
282 }
283 spin_unlock(&nfs_client_lock);
284 return NULL;
285}
286
287/*
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500288 * Find a client by IP address and protocol version
289 * - returns NULL if no such client
290 */
291struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
292{
293 struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
294 u32 nfsvers = clp->rpc_ops->version;
295
296 spin_lock(&nfs_client_lock);
297 list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
298 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
299
300 /* Don't match clients that failed to initialise properly */
301 if (clp->cl_cons_state != NFS_CS_READY)
302 continue;
303
304 /* Different NFS versions cannot share the same nfs_client */
305 if (clp->rpc_ops->version != nfsvers)
306 continue;
307
308 if (sap->sa_family != clap->sa_family)
309 continue;
310 /* Match only the IP address, not the port number */
311 if (!nfs_sockaddr_match_ipaddr(sap, clap))
312 continue;
313
314 atomic_inc(&clp->cl_count);
315 spin_unlock(&nfs_client_lock);
316 return clp;
317 }
318 spin_unlock(&nfs_client_lock);
319 return NULL;
320}
321
322/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500323 * Find an nfs_client on the list that matches the initialisation data
324 * that is supplied.
325 */
326static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400327{
328 struct nfs_client *clp;
329
330 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
Trond Myklebust13bbc062006-10-19 23:28:40 -0700331 /* Don't match clients that failed to initialise properly */
332 if (clp->cl_cons_state < 0)
333 continue;
334
David Howells24c8dbb2006-08-22 20:06:10 -0400335 /* Different NFS versions cannot share the same nfs_client */
Trond Myklebust40c553192007-12-14 14:56:07 -0500336 if (clp->rpc_ops != data->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400337 continue;
338
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500339 if (clp->cl_proto != data->proto)
340 continue;
341
Trond Myklebustc81468a2007-12-14 14:56:05 -0500342 /* Match the full socket address */
343 if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0)
David Howells24c8dbb2006-08-22 20:06:10 -0400344 continue;
345
Trond Myklebustc81468a2007-12-14 14:56:05 -0500346 atomic_inc(&clp->cl_count);
347 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400348 }
David Howells24c8dbb2006-08-22 20:06:10 -0400349 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400350}
351
352/*
353 * Look up a client by IP address and protocol version
354 * - creates a new record if one doesn't yet exist
355 */
Trond Myklebust3a498022007-12-14 14:56:04 -0500356static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400357{
358 struct nfs_client *clp, *new = NULL;
359 int error;
360
Chuck Leverd7422c42007-12-10 14:58:51 -0500361 dprintk("--> nfs_get_client(%s,v%u)\n",
362 cl_init->hostname ?: "", cl_init->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400363
364 /* see if the client already exists */
365 do {
366 spin_lock(&nfs_client_lock);
367
Trond Myklebustc81468a2007-12-14 14:56:05 -0500368 clp = nfs_match_client(cl_init);
David Howells24c8dbb2006-08-22 20:06:10 -0400369 if (clp)
370 goto found_client;
371 if (new)
372 goto install_client;
373
374 spin_unlock(&nfs_client_lock);
375
Trond Myklebust3a498022007-12-14 14:56:04 -0500376 new = nfs_alloc_client(cl_init);
David Howells24c8dbb2006-08-22 20:06:10 -0400377 } while (new);
378
379 return ERR_PTR(-ENOMEM);
380
381 /* install a new client and return with it unready */
382install_client:
383 clp = new;
384 list_add(&clp->cl_share_link, &nfs_client_list);
385 spin_unlock(&nfs_client_lock);
386 dprintk("--> nfs_get_client() = %p [new]\n", clp);
387 return clp;
388
389 /* found an existing client
390 * - make sure it's ready before returning
391 */
392found_client:
393 spin_unlock(&nfs_client_lock);
394
395 if (new)
396 nfs_free_client(new);
397
Matthew Wilcox150030b2007-12-06 16:24:39 -0500398 error = wait_event_killable(nfs_client_active_wq,
Trond Myklebust0bae89e2006-10-08 14:33:24 -0400399 clp->cl_cons_state != NFS_CS_INITING);
400 if (error < 0) {
401 nfs_put_client(clp);
402 return ERR_PTR(-ERESTARTSYS);
David Howells24c8dbb2006-08-22 20:06:10 -0400403 }
404
405 if (clp->cl_cons_state < NFS_CS_READY) {
406 error = clp->cl_cons_state;
407 nfs_put_client(clp);
408 return ERR_PTR(error);
409 }
410
David Howells54ceac42006-08-22 20:06:13 -0400411 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
412
David Howells24c8dbb2006-08-22 20:06:10 -0400413 dprintk("--> nfs_get_client() = %p [share]\n", clp);
414 return clp;
415}
416
417/*
418 * Mark a server as ready or failed
419 */
David Howells54ceac42006-08-22 20:06:13 -0400420static void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400421{
422 clp->cl_cons_state = state;
423 wake_up_all(&nfs_client_active_wq);
424}
David Howells5006a762006-08-22 20:06:12 -0400425
426/*
427 * Initialise the timeout values for a connection
428 */
429static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
430 unsigned int timeo, unsigned int retrans)
431{
432 to->to_initval = timeo * HZ / 10;
433 to->to_retries = retrans;
434 if (!to->to_retries)
435 to->to_retries = 2;
436
437 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400438 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400439 case XPRT_TRANSPORT_RDMA:
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500440 if (to->to_initval == 0)
David Howells5006a762006-08-22 20:06:12 -0400441 to->to_initval = 60 * HZ;
442 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
443 to->to_initval = NFS_MAX_TCP_TIMEOUT;
444 to->to_increment = to->to_initval;
445 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500446 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
447 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
448 if (to->to_maxval < to->to_initval)
449 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400450 to->to_exponential = 0;
451 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400452 case XPRT_TRANSPORT_UDP:
David Howells5006a762006-08-22 20:06:12 -0400453 default:
454 if (!to->to_initval)
455 to->to_initval = 11 * HZ / 10;
456 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
457 to->to_initval = NFS_MAX_UDP_TIMEOUT;
458 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
459 to->to_exponential = 1;
460 break;
461 }
462}
463
464/*
465 * Create an RPC client handle
466 */
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500467static int nfs_create_rpc_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500468 const struct rpc_timeout *timeparms,
469 rpc_authflavor_t flavor,
470 int flags)
David Howells5006a762006-08-22 20:06:12 -0400471{
David Howells5006a762006-08-22 20:06:12 -0400472 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400473 struct rpc_create_args args = {
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500474 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400475 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500476 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500477 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400478 .servername = clp->cl_hostname,
479 .program = &nfs_program,
480 .version = clp->rpc_ops->version,
481 .authflavor = flavor,
Chuck Lever43d78ef2007-02-06 18:26:11 -0500482 .flags = flags,
Chuck Lever41877d22006-08-22 20:06:20 -0400483 };
David Howells5006a762006-08-22 20:06:12 -0400484
485 if (!IS_ERR(clp->cl_rpcclient))
486 return 0;
487
Chuck Lever41877d22006-08-22 20:06:20 -0400488 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400489 if (IS_ERR(clnt)) {
490 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700491 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400492 return PTR_ERR(clnt);
493 }
494
David Howells5006a762006-08-22 20:06:12 -0400495 clp->cl_rpcclient = clnt;
496 return 0;
497}
David Howells54ceac42006-08-22 20:06:13 -0400498
499/*
500 * Version 2 or 3 client destruction
501 */
502static void nfs_destroy_server(struct nfs_server *server)
503{
David Howells54ceac42006-08-22 20:06:13 -0400504 if (!(server->flags & NFS_MOUNT_NONLM))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500505 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400506}
507
508/*
509 * Version 2 or 3 lockd setup
510 */
511static int nfs_start_lockd(struct nfs_server *server)
512{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500513 struct nlm_host *host;
514 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500515 struct nlmclnt_initdata nlm_init = {
516 .hostname = clp->cl_hostname,
517 .address = (struct sockaddr *)&clp->cl_addr,
518 .addrlen = clp->cl_addrlen,
519 .protocol = server->flags & NFS_MOUNT_TCP ?
520 IPPROTO_TCP : IPPROTO_UDP,
521 .nfs_version = clp->rpc_ops->version,
522 };
David Howells54ceac42006-08-22 20:06:13 -0400523
Chuck Lever883bb162008-01-15 16:04:20 -0500524 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500525 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400526 if (server->flags & NFS_MOUNT_NONLM)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500527 return 0;
528
Chuck Lever883bb162008-01-15 16:04:20 -0500529 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500530 if (IS_ERR(host))
531 return PTR_ERR(host);
532
533 server->nlm_host = host;
534 server->destroy = nfs_destroy_server;
535 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400536}
537
538/*
539 * Initialise an NFSv3 ACL client connection
540 */
541#ifdef CONFIG_NFS_V3_ACL
542static void nfs_init_server_aclclient(struct nfs_server *server)
543{
Trond Myklebust40c553192007-12-14 14:56:07 -0500544 if (server->nfs_client->rpc_ops->version != 3)
David Howells54ceac42006-08-22 20:06:13 -0400545 goto out_noacl;
546 if (server->flags & NFS_MOUNT_NOACL)
547 goto out_noacl;
548
549 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
550 if (IS_ERR(server->client_acl))
551 goto out_noacl;
552
553 /* No errors! Assume that Sun nfsacls are supported */
554 server->caps |= NFS_CAP_ACLS;
555 return;
556
557out_noacl:
558 server->caps &= ~NFS_CAP_ACLS;
559}
560#else
561static inline void nfs_init_server_aclclient(struct nfs_server *server)
562{
563 server->flags &= ~NFS_MOUNT_NOACL;
564 server->caps &= ~NFS_CAP_ACLS;
565}
566#endif
567
568/*
569 * Create a general RPC client
570 */
Trond Myklebust33170232007-12-20 16:03:59 -0500571static int nfs_init_server_rpcclient(struct nfs_server *server,
572 const struct rpc_timeout *timeo,
573 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400574{
575 struct nfs_client *clp = server->nfs_client;
576
577 server->client = rpc_clone_client(clp->cl_rpcclient);
578 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700579 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400580 return PTR_ERR(server->client);
581 }
582
Trond Myklebust33170232007-12-20 16:03:59 -0500583 memcpy(&server->client->cl_timeout_default,
584 timeo,
585 sizeof(server->client->cl_timeout_default));
586 server->client->cl_timeout = &server->client->cl_timeout_default;
587
David Howells54ceac42006-08-22 20:06:13 -0400588 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
589 struct rpc_auth *auth;
590
591 auth = rpcauth_create(pseudoflavour, server->client);
592 if (IS_ERR(auth)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700593 dprintk("%s: couldn't create credcache!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400594 return PTR_ERR(auth);
595 }
596 }
597 server->client->cl_softrtry = 0;
598 if (server->flags & NFS_MOUNT_SOFT)
599 server->client->cl_softrtry = 1;
600
David Howells54ceac42006-08-22 20:06:13 -0400601 return 0;
602}
603
604/*
605 * Initialise an NFS2 or NFS3 client
606 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400607static int nfs_init_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500608 const struct rpc_timeout *timeparms,
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400609 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -0400610{
David Howells54ceac42006-08-22 20:06:13 -0400611 int error;
612
613 if (clp->cl_cons_state == NFS_CS_READY) {
614 /* the client is already initialised */
615 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
616 return 0;
617 }
618
David Howells54ceac42006-08-22 20:06:13 -0400619 /*
620 * Create a client RPC handle for doing FSSTAT with UNIX auth only
621 * - RFC 2623, sec 2.3.2
622 */
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500623 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, 0);
David Howells54ceac42006-08-22 20:06:13 -0400624 if (error < 0)
625 goto error;
626 nfs_mark_client_ready(clp, NFS_CS_READY);
627 return 0;
628
629error:
630 nfs_mark_client_ready(clp, error);
631 dprintk("<-- nfs_init_client() = xerror %d\n", error);
632 return error;
633}
634
635/*
636 * Create a version 2 or 3 client
637 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400638static int nfs_init_server(struct nfs_server *server,
639 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -0400640{
Trond Myklebust3a498022007-12-14 14:56:04 -0500641 struct nfs_client_initdata cl_init = {
642 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500643 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500644 .addrlen = data->nfs_server.addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -0500645 .rpc_ops = &nfs_v2_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500646 .proto = data->nfs_server.protocol,
Trond Myklebust3a498022007-12-14 14:56:04 -0500647 };
Trond Myklebust33170232007-12-20 16:03:59 -0500648 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400649 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500650 int error;
David Howells54ceac42006-08-22 20:06:13 -0400651
652 dprintk("--> nfs_init_server()\n");
653
654#ifdef CONFIG_NFS_V3
655 if (data->flags & NFS_MOUNT_VER3)
Trond Myklebust40c553192007-12-14 14:56:07 -0500656 cl_init.rpc_ops = &nfs_v3_clientops;
David Howells54ceac42006-08-22 20:06:13 -0400657#endif
658
659 /* Allocate or find a client reference we can use */
Trond Myklebust3a498022007-12-14 14:56:04 -0500660 clp = nfs_get_client(&cl_init);
David Howells54ceac42006-08-22 20:06:13 -0400661 if (IS_ERR(clp)) {
662 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
663 return PTR_ERR(clp);
664 }
665
Trond Myklebust33170232007-12-20 16:03:59 -0500666 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
667 data->timeo, data->retrans);
668 error = nfs_init_client(clp, &timeparms, data);
David Howells54ceac42006-08-22 20:06:13 -0400669 if (error < 0)
670 goto error;
671
672 server->nfs_client = clp;
673
674 /* Initialise the client representation from the mount data */
675 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
676
677 if (data->rsize)
678 server->rsize = nfs_block_size(data->rsize, NULL);
679 if (data->wsize)
680 server->wsize = nfs_block_size(data->wsize, NULL);
681
682 server->acregmin = data->acregmin * HZ;
683 server->acregmax = data->acregmax * HZ;
684 server->acdirmin = data->acdirmin * HZ;
685 server->acdirmax = data->acdirmax * HZ;
686
687 /* Start lockd here, before we might error out */
688 error = nfs_start_lockd(server);
689 if (error < 0)
690 goto error;
691
Chuck Leverf22d6d72008-03-14 14:10:22 -0400692 server->port = data->nfs_server.port;
693
Trond Myklebust33170232007-12-20 16:03:59 -0500694 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -0400695 if (error < 0)
696 goto error;
697
Chuck Lever3f8400d2008-03-14 14:10:30 -0400698 /* Preserve the values of mount_server-related mount options */
699 if (data->mount_server.addrlen) {
700 memcpy(&server->mountd_address, &data->mount_server.address,
701 data->mount_server.addrlen);
702 server->mountd_addrlen = data->mount_server.addrlen;
703 }
704 server->mountd_version = data->mount_server.version;
705 server->mountd_port = data->mount_server.port;
706 server->mountd_protocol = data->mount_server.protocol;
707
David Howells54ceac42006-08-22 20:06:13 -0400708 server->namelen = data->namlen;
709 /* Create a client RPC handle for the NFSv3 ACL management interface */
710 nfs_init_server_aclclient(server);
David Howells54ceac42006-08-22 20:06:13 -0400711 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
712 return 0;
713
714error:
715 server->nfs_client = NULL;
716 nfs_put_client(clp);
717 dprintk("<-- nfs_init_server() = xerror %d\n", error);
718 return error;
719}
720
721/*
722 * Load up the server record from information gained in an fsinfo record
723 */
724static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
725{
726 unsigned long max_rpc_payload;
727
728 /* Work out a lot of parameters */
729 if (server->rsize == 0)
730 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
731 if (server->wsize == 0)
732 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
733
734 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
735 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
736 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
737 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
738
739 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
740 if (server->rsize > max_rpc_payload)
741 server->rsize = max_rpc_payload;
742 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
743 server->rsize = NFS_MAX_FILE_IO_SIZE;
744 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700745
David Howells54ceac42006-08-22 20:06:13 -0400746 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
747
748 if (server->wsize > max_rpc_payload)
749 server->wsize = max_rpc_payload;
750 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
751 server->wsize = NFS_MAX_FILE_IO_SIZE;
752 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
753 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
754
755 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
756 if (server->dtsize > PAGE_CACHE_SIZE)
757 server->dtsize = PAGE_CACHE_SIZE;
758 if (server->dtsize > server->rsize)
759 server->dtsize = server->rsize;
760
761 if (server->flags & NFS_MOUNT_NOAC) {
762 server->acregmin = server->acregmax = 0;
763 server->acdirmin = server->acdirmax = 0;
764 }
765
766 server->maxfilesize = fsinfo->maxfilesize;
767
768 /* We're airborne Set socket buffersize */
769 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
770}
771
772/*
773 * Probe filesystem information, including the FSID on v2/v3
774 */
775static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
776{
777 struct nfs_fsinfo fsinfo;
778 struct nfs_client *clp = server->nfs_client;
779 int error;
780
781 dprintk("--> nfs_probe_fsinfo()\n");
782
783 if (clp->rpc_ops->set_capabilities != NULL) {
784 error = clp->rpc_ops->set_capabilities(server, mntfh);
785 if (error < 0)
786 goto out_error;
787 }
788
789 fsinfo.fattr = fattr;
790 nfs_fattr_init(fattr);
791 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
792 if (error < 0)
793 goto out_error;
794
795 nfs_server_set_fsinfo(server, &fsinfo);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700796 error = bdi_init(&server->backing_dev_info);
797 if (error)
798 goto out_error;
799
David Howells54ceac42006-08-22 20:06:13 -0400800
801 /* Get some general file system info */
802 if (server->namelen == 0) {
803 struct nfs_pathconf pathinfo;
804
805 pathinfo.fattr = fattr;
806 nfs_fattr_init(fattr);
807
808 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
809 server->namelen = pathinfo.max_namelen;
810 }
811
812 dprintk("<-- nfs_probe_fsinfo() = 0\n");
813 return 0;
814
815out_error:
816 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
817 return error;
818}
819
820/*
821 * Copy useful information when duplicating a server record
822 */
823static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
824{
825 target->flags = source->flags;
826 target->acregmin = source->acregmin;
827 target->acregmax = source->acregmax;
828 target->acdirmin = source->acdirmin;
829 target->acdirmax = source->acdirmax;
830 target->caps = source->caps;
831}
832
833/*
834 * Allocate and initialise a server record
835 */
836static struct nfs_server *nfs_alloc_server(void)
837{
838 struct nfs_server *server;
839
840 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
841 if (!server)
842 return NULL;
843
844 server->client = server->client_acl = ERR_PTR(-EINVAL);
845
846 /* Zero out the NFS state stuff */
847 INIT_LIST_HEAD(&server->client_link);
848 INIT_LIST_HEAD(&server->master_link);
849
Steve Dicksonef818a22007-11-08 04:05:04 -0500850 init_waitqueue_head(&server->active_wq);
851 atomic_set(&server->active, 0);
852
David Howells54ceac42006-08-22 20:06:13 -0400853 server->io_stats = nfs_alloc_iostats();
854 if (!server->io_stats) {
855 kfree(server);
856 return NULL;
857 }
858
859 return server;
860}
861
862/*
863 * Free up a server record
864 */
865void nfs_free_server(struct nfs_server *server)
866{
867 dprintk("--> nfs_free_server()\n");
868
869 spin_lock(&nfs_client_lock);
870 list_del(&server->client_link);
871 list_del(&server->master_link);
872 spin_unlock(&nfs_client_lock);
873
874 if (server->destroy != NULL)
875 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -0500876
877 if (!IS_ERR(server->client_acl))
878 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -0400879 if (!IS_ERR(server->client))
880 rpc_shutdown_client(server->client);
881
882 nfs_put_client(server->nfs_client);
883
884 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700885 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -0400886 kfree(server);
887 nfs_release_automount_timer();
888 dprintk("<-- nfs_free_server()\n");
889}
890
891/*
892 * Create a version 2 or 3 volume record
893 * - keyed on server and FSID
894 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400895struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -0400896 struct nfs_fh *mntfh)
897{
898 struct nfs_server *server;
899 struct nfs_fattr fattr;
900 int error;
901
902 server = nfs_alloc_server();
903 if (!server)
904 return ERR_PTR(-ENOMEM);
905
906 /* Get a client representation */
907 error = nfs_init_server(server, data);
908 if (error < 0)
909 goto error;
910
911 BUG_ON(!server->nfs_client);
912 BUG_ON(!server->nfs_client->rpc_ops);
913 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
914
915 /* Probe the root fh to retrieve its FSID */
916 error = nfs_probe_fsinfo(server, mntfh, &fattr);
917 if (error < 0)
918 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -0400919 if (server->nfs_client->rpc_ops->version == 3) {
920 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
921 server->namelen = NFS3_MAXNAMLEN;
922 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
923 server->caps |= NFS_CAP_READDIRPLUS;
924 } else {
925 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
926 server->namelen = NFS2_MAXNAMLEN;
927 }
928
David Howells54ceac42006-08-22 20:06:13 -0400929 if (!(fattr.valid & NFS_ATTR_FATTR)) {
930 error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr);
931 if (error < 0) {
932 dprintk("nfs_create_server: getattr error = %d\n", -error);
933 goto error;
934 }
935 }
936 memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
937
David Howells6daabf12006-08-24 15:44:16 -0400938 dprintk("Server FSID: %llx:%llx\n",
939 (unsigned long long) server->fsid.major,
940 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -0400941
942 BUG_ON(!server->nfs_client);
943 BUG_ON(!server->nfs_client->rpc_ops);
944 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
945
946 spin_lock(&nfs_client_lock);
947 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
948 list_add_tail(&server->master_link, &nfs_volume_list);
949 spin_unlock(&nfs_client_lock);
950
951 server->mount_time = jiffies;
952 return server;
953
954error:
955 nfs_free_server(server);
956 return ERR_PTR(error);
957}
958
959#ifdef CONFIG_NFS_V4
960/*
961 * Initialise an NFS4 client record
962 */
963static int nfs4_init_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500964 const struct rpc_timeout *timeparms,
J. Bruce Fields7d9ac062006-10-19 23:28:39 -0700965 const char *ip_addr,
David Howells54ceac42006-08-22 20:06:13 -0400966 rpc_authflavor_t authflavour)
967{
968 int error;
969
970 if (clp->cl_cons_state == NFS_CS_READY) {
971 /* the client is initialised already */
972 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
973 return 0;
974 }
975
976 /* Check NFS protocol revision and initialize RPC op vector */
977 clp->rpc_ops = &nfs_v4_clientops;
978
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500979 error = nfs_create_rpc_client(clp, timeparms, authflavour,
Chuck Lever43d78ef2007-02-06 18:26:11 -0500980 RPC_CLNT_CREATE_DISCRTRY);
David Howells54ceac42006-08-22 20:06:13 -0400981 if (error < 0)
982 goto error;
J. Bruce Fields7d9ac062006-10-19 23:28:39 -0700983 memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
David Howells54ceac42006-08-22 20:06:13 -0400984
985 error = nfs_idmap_new(clp);
986 if (error < 0) {
987 dprintk("%s: failed to create idmapper. Error = %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700988 __func__, error);
David Howells54ceac42006-08-22 20:06:13 -0400989 goto error;
990 }
Trond Myklebust9c5bf382006-08-22 20:06:14 -0400991 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
David Howells54ceac42006-08-22 20:06:13 -0400992
993 nfs_mark_client_ready(clp, NFS_CS_READY);
994 return 0;
995
996error:
997 nfs_mark_client_ready(clp, error);
998 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
999 return error;
1000}
1001
1002/*
1003 * Set up an NFS4 client
1004 */
1005static int nfs4_set_client(struct nfs_server *server,
Chuck Leverdcecae02007-12-10 14:58:59 -05001006 const char *hostname,
1007 const struct sockaddr *addr,
1008 const size_t addrlen,
J. Bruce Fields7d9ac062006-10-19 23:28:39 -07001009 const char *ip_addr,
David Howells54ceac42006-08-22 20:06:13 -04001010 rpc_authflavor_t authflavour,
Trond Myklebust33170232007-12-20 16:03:59 -05001011 int proto, const struct rpc_timeout *timeparms)
David Howells54ceac42006-08-22 20:06:13 -04001012{
Trond Myklebust3a498022007-12-14 14:56:04 -05001013 struct nfs_client_initdata cl_init = {
1014 .hostname = hostname,
Chuck Leverdcecae02007-12-10 14:58:59 -05001015 .addr = addr,
1016 .addrlen = addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -05001017 .rpc_ops = &nfs_v4_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001018 .proto = proto,
Trond Myklebust3a498022007-12-14 14:56:04 -05001019 };
David Howells54ceac42006-08-22 20:06:13 -04001020 struct nfs_client *clp;
1021 int error;
1022
1023 dprintk("--> nfs4_set_client()\n");
1024
1025 /* Allocate or find a client reference we can use */
Trond Myklebust3a498022007-12-14 14:56:04 -05001026 clp = nfs_get_client(&cl_init);
David Howells54ceac42006-08-22 20:06:13 -04001027 if (IS_ERR(clp)) {
1028 error = PTR_ERR(clp);
1029 goto error;
1030 }
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001031 error = nfs4_init_client(clp, timeparms, ip_addr, authflavour);
David Howells54ceac42006-08-22 20:06:13 -04001032 if (error < 0)
1033 goto error_put;
1034
1035 server->nfs_client = clp;
1036 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1037 return 0;
1038
1039error_put:
1040 nfs_put_client(clp);
1041error:
1042 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1043 return error;
1044}
1045
1046/*
1047 * Create a version 4 volume record
1048 */
1049static int nfs4_init_server(struct nfs_server *server,
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001050 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -04001051{
Trond Myklebust33170232007-12-20 16:03:59 -05001052 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -04001053 int error;
1054
1055 dprintk("--> nfs4_init_server()\n");
1056
Trond Myklebust33170232007-12-20 16:03:59 -05001057 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1058 data->timeo, data->retrans);
1059
1060 /* Get a client record */
1061 error = nfs4_set_client(server,
1062 data->nfs_server.hostname,
1063 (const struct sockaddr *)&data->nfs_server.address,
1064 data->nfs_server.addrlen,
1065 data->client_address,
1066 data->auth_flavors[0],
1067 data->nfs_server.protocol,
1068 &timeparms);
1069 if (error < 0)
1070 goto error;
1071
David Howells54ceac42006-08-22 20:06:13 -04001072 /* Initialise the client representation from the mount data */
1073 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1074 server->caps |= NFS_CAP_ATOMIC_OPEN;
1075
1076 if (data->rsize)
1077 server->rsize = nfs_block_size(data->rsize, NULL);
1078 if (data->wsize)
1079 server->wsize = nfs_block_size(data->wsize, NULL);
1080
1081 server->acregmin = data->acregmin * HZ;
1082 server->acregmax = data->acregmax * HZ;
1083 server->acdirmin = data->acdirmin * HZ;
1084 server->acdirmax = data->acdirmax * HZ;
1085
Chuck Leverf22d6d72008-03-14 14:10:22 -04001086 server->port = data->nfs_server.port;
1087
Trond Myklebust33170232007-12-20 16:03:59 -05001088 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -04001089
Trond Myklebust33170232007-12-20 16:03:59 -05001090error:
David Howells54ceac42006-08-22 20:06:13 -04001091 /* Done */
1092 dprintk("<-- nfs4_init_server() = %d\n", error);
1093 return error;
1094}
1095
1096/*
1097 * Create a version 4 volume record
1098 * - keyed on server and FSID
1099 */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001100struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -04001101 struct nfs_fh *mntfh)
1102{
1103 struct nfs_fattr fattr;
1104 struct nfs_server *server;
1105 int error;
1106
1107 dprintk("--> nfs4_create_server()\n");
1108
1109 server = nfs_alloc_server();
1110 if (!server)
1111 return ERR_PTR(-ENOMEM);
1112
David Howells54ceac42006-08-22 20:06:13 -04001113 /* set up the general RPC client */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001114 error = nfs4_init_server(server, data);
David Howells54ceac42006-08-22 20:06:13 -04001115 if (error < 0)
1116 goto error;
1117
1118 BUG_ON(!server->nfs_client);
1119 BUG_ON(!server->nfs_client->rpc_ops);
1120 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1121
1122 /* Probe the root fh to retrieve its FSID */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001123 error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path);
David Howells54ceac42006-08-22 20:06:13 -04001124 if (error < 0)
1125 goto error;
1126
David Howells6daabf12006-08-24 15:44:16 -04001127 dprintk("Server FSID: %llx:%llx\n",
1128 (unsigned long long) server->fsid.major,
1129 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001130 dprintk("Mount FH: %d\n", mntfh->size);
1131
1132 error = nfs_probe_fsinfo(server, mntfh, &fattr);
1133 if (error < 0)
1134 goto error;
1135
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001136 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1137 server->namelen = NFS4_MAXNAMLEN;
1138
David Howells54ceac42006-08-22 20:06:13 -04001139 BUG_ON(!server->nfs_client);
1140 BUG_ON(!server->nfs_client->rpc_ops);
1141 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1142
1143 spin_lock(&nfs_client_lock);
1144 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1145 list_add_tail(&server->master_link, &nfs_volume_list);
1146 spin_unlock(&nfs_client_lock);
1147
1148 server->mount_time = jiffies;
1149 dprintk("<-- nfs4_create_server() = %p\n", server);
1150 return server;
1151
1152error:
1153 nfs_free_server(server);
1154 dprintk("<-- nfs4_create_server() = error %d\n", error);
1155 return ERR_PTR(error);
1156}
1157
1158/*
1159 * Create an NFS4 referral server record
1160 */
1161struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001162 struct nfs_fh *mntfh)
David Howells54ceac42006-08-22 20:06:13 -04001163{
1164 struct nfs_client *parent_client;
1165 struct nfs_server *server, *parent_server;
1166 struct nfs_fattr fattr;
1167 int error;
1168
1169 dprintk("--> nfs4_create_referral_server()\n");
1170
1171 server = nfs_alloc_server();
1172 if (!server)
1173 return ERR_PTR(-ENOMEM);
1174
1175 parent_server = NFS_SB(data->sb);
1176 parent_client = parent_server->nfs_client;
1177
1178 /* Get a client representation.
1179 * Note: NFSv4 always uses TCP, */
Chuck Leverdcecae02007-12-10 14:58:59 -05001180 error = nfs4_set_client(server, data->hostname,
Chuck Lever6677d092007-12-10 14:59:06 -05001181 data->addr,
1182 data->addrlen,
Chuck Leverdcecae02007-12-10 14:58:59 -05001183 parent_client->cl_ipaddr,
1184 data->authflavor,
1185 parent_server->client->cl_xprt->prot,
Trond Myklebust33170232007-12-20 16:03:59 -05001186 parent_server->client->cl_timeout);
andros@citi.umich.edu297de4f2006-08-29 12:19:41 -04001187 if (error < 0)
1188 goto error;
David Howells54ceac42006-08-22 20:06:13 -04001189
1190 /* Initialise the client representation from the parent server */
1191 nfs_server_copy_userdata(server, parent_server);
1192 server->caps |= NFS_CAP_ATOMIC_OPEN;
1193
Trond Myklebust33170232007-12-20 16:03:59 -05001194 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
David Howells54ceac42006-08-22 20:06:13 -04001195 if (error < 0)
1196 goto error;
1197
1198 BUG_ON(!server->nfs_client);
1199 BUG_ON(!server->nfs_client->rpc_ops);
1200 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1201
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001202 /* Probe the root fh to retrieve its FSID and filehandle */
1203 error = nfs4_path_walk(server, mntfh, data->mnt_path);
1204 if (error < 0)
1205 goto error;
1206
David Howells54ceac42006-08-22 20:06:13 -04001207 /* probe the filesystem info for this server filesystem */
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001208 error = nfs_probe_fsinfo(server, mntfh, &fattr);
David Howells54ceac42006-08-22 20:06:13 -04001209 if (error < 0)
1210 goto error;
1211
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001212 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1213 server->namelen = NFS4_MAXNAMLEN;
1214
David Howells54ceac42006-08-22 20:06:13 -04001215 dprintk("Referral FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001216 (unsigned long long) server->fsid.major,
1217 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001218
1219 spin_lock(&nfs_client_lock);
1220 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1221 list_add_tail(&server->master_link, &nfs_volume_list);
1222 spin_unlock(&nfs_client_lock);
1223
1224 server->mount_time = jiffies;
1225
1226 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1227 return server;
1228
1229error:
1230 nfs_free_server(server);
1231 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1232 return ERR_PTR(error);
1233}
1234
1235#endif /* CONFIG_NFS_V4 */
1236
1237/*
1238 * Clone an NFS2, NFS3 or NFS4 server record
1239 */
1240struct nfs_server *nfs_clone_server(struct nfs_server *source,
1241 struct nfs_fh *fh,
1242 struct nfs_fattr *fattr)
1243{
1244 struct nfs_server *server;
1245 struct nfs_fattr fattr_fsinfo;
1246 int error;
1247
1248 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001249 (unsigned long long) fattr->fsid.major,
1250 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001251
1252 server = nfs_alloc_server();
1253 if (!server)
1254 return ERR_PTR(-ENOMEM);
1255
1256 /* Copy data from the source */
1257 server->nfs_client = source->nfs_client;
1258 atomic_inc(&server->nfs_client->cl_count);
1259 nfs_server_copy_userdata(server, source);
1260
1261 server->fsid = fattr->fsid;
1262
Trond Myklebust33170232007-12-20 16:03:59 -05001263 error = nfs_init_server_rpcclient(server,
1264 source->client->cl_timeout,
1265 source->client->cl_auth->au_flavor);
David Howells54ceac42006-08-22 20:06:13 -04001266 if (error < 0)
1267 goto out_free_server;
1268 if (!IS_ERR(source->client_acl))
1269 nfs_init_server_aclclient(server);
1270
1271 /* probe the filesystem info for this server filesystem */
1272 error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo);
1273 if (error < 0)
1274 goto out_free_server;
1275
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001276 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1277 server->namelen = NFS4_MAXNAMLEN;
1278
David Howells54ceac42006-08-22 20:06:13 -04001279 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001280 (unsigned long long) server->fsid.major,
1281 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001282
1283 error = nfs_start_lockd(server);
1284 if (error < 0)
1285 goto out_free_server;
1286
1287 spin_lock(&nfs_client_lock);
1288 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1289 list_add_tail(&server->master_link, &nfs_volume_list);
1290 spin_unlock(&nfs_client_lock);
1291
1292 server->mount_time = jiffies;
1293
1294 dprintk("<-- nfs_clone_server() = %p\n", server);
1295 return server;
1296
1297out_free_server:
1298 nfs_free_server(server);
1299 dprintk("<-- nfs_clone_server() = error %d\n", error);
1300 return ERR_PTR(error);
1301}
David Howells6aaca562006-08-22 20:06:13 -04001302
1303#ifdef CONFIG_PROC_FS
1304static struct proc_dir_entry *proc_fs_nfs;
1305
1306static int nfs_server_list_open(struct inode *inode, struct file *file);
1307static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1308static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1309static void nfs_server_list_stop(struct seq_file *p, void *v);
1310static int nfs_server_list_show(struct seq_file *m, void *v);
1311
1312static struct seq_operations nfs_server_list_ops = {
1313 .start = nfs_server_list_start,
1314 .next = nfs_server_list_next,
1315 .stop = nfs_server_list_stop,
1316 .show = nfs_server_list_show,
1317};
1318
Arjan van de Ven00977a52007-02-12 00:55:34 -08001319static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001320 .open = nfs_server_list_open,
1321 .read = seq_read,
1322 .llseek = seq_lseek,
1323 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001324 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001325};
1326
1327static int nfs_volume_list_open(struct inode *inode, struct file *file);
1328static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1329static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1330static void nfs_volume_list_stop(struct seq_file *p, void *v);
1331static int nfs_volume_list_show(struct seq_file *m, void *v);
1332
1333static struct seq_operations nfs_volume_list_ops = {
1334 .start = nfs_volume_list_start,
1335 .next = nfs_volume_list_next,
1336 .stop = nfs_volume_list_stop,
1337 .show = nfs_volume_list_show,
1338};
1339
Arjan van de Ven00977a52007-02-12 00:55:34 -08001340static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001341 .open = nfs_volume_list_open,
1342 .read = seq_read,
1343 .llseek = seq_lseek,
1344 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001345 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001346};
1347
1348/*
1349 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1350 * we're dealing
1351 */
1352static int nfs_server_list_open(struct inode *inode, struct file *file)
1353{
1354 struct seq_file *m;
1355 int ret;
1356
1357 ret = seq_open(file, &nfs_server_list_ops);
1358 if (ret < 0)
1359 return ret;
1360
1361 m = file->private_data;
1362 m->private = PDE(inode)->data;
1363
1364 return 0;
1365}
1366
1367/*
1368 * set up the iterator to start reading from the server list and return the first item
1369 */
1370static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1371{
David Howells6aaca562006-08-22 20:06:13 -04001372 /* lock the list against modification */
1373 spin_lock(&nfs_client_lock);
Pavel Emelianov259902e2007-07-15 23:39:56 -07001374 return seq_list_start_head(&nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001375}
1376
1377/*
1378 * move to next server
1379 */
1380static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1381{
Pavel Emelianov259902e2007-07-15 23:39:56 -07001382 return seq_list_next(v, &nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001383}
1384
1385/*
1386 * clean up after reading from the transports list
1387 */
1388static void nfs_server_list_stop(struct seq_file *p, void *v)
1389{
1390 spin_unlock(&nfs_client_lock);
1391}
1392
1393/*
1394 * display a header line followed by a load of call lines
1395 */
1396static int nfs_server_list_show(struct seq_file *m, void *v)
1397{
1398 struct nfs_client *clp;
1399
1400 /* display header on line 1 */
Pavel Emelianov259902e2007-07-15 23:39:56 -07001401 if (v == &nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001402 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1403 return 0;
1404 }
1405
1406 /* display one transport per line on subsequent lines */
1407 clp = list_entry(v, struct nfs_client, cl_share_link);
1408
Chuck Lever5d8515c2007-12-10 14:57:16 -05001409 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001410 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001411 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1412 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001413 atomic_read(&clp->cl_count),
1414 clp->cl_hostname);
1415
1416 return 0;
1417}
1418
1419/*
1420 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1421 */
1422static int nfs_volume_list_open(struct inode *inode, struct file *file)
1423{
1424 struct seq_file *m;
1425 int ret;
1426
1427 ret = seq_open(file, &nfs_volume_list_ops);
1428 if (ret < 0)
1429 return ret;
1430
1431 m = file->private_data;
1432 m->private = PDE(inode)->data;
1433
1434 return 0;
1435}
1436
1437/*
1438 * set up the iterator to start reading from the volume list and return the first item
1439 */
1440static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1441{
David Howells6aaca562006-08-22 20:06:13 -04001442 /* lock the list against modification */
1443 spin_lock(&nfs_client_lock);
Pavel Emelianov259902e2007-07-15 23:39:56 -07001444 return seq_list_start_head(&nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001445}
1446
1447/*
1448 * move to next volume
1449 */
1450static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1451{
Pavel Emelianov259902e2007-07-15 23:39:56 -07001452 return seq_list_next(v, &nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001453}
1454
1455/*
1456 * clean up after reading from the transports list
1457 */
1458static void nfs_volume_list_stop(struct seq_file *p, void *v)
1459{
1460 spin_unlock(&nfs_client_lock);
1461}
1462
1463/*
1464 * display a header line followed by a load of call lines
1465 */
1466static int nfs_volume_list_show(struct seq_file *m, void *v)
1467{
1468 struct nfs_server *server;
1469 struct nfs_client *clp;
1470 char dev[8], fsid[17];
1471
1472 /* display header on line 1 */
Pavel Emelianov259902e2007-07-15 23:39:56 -07001473 if (v == &nfs_volume_list) {
David Howells6aaca562006-08-22 20:06:13 -04001474 seq_puts(m, "NV SERVER PORT DEV FSID\n");
1475 return 0;
1476 }
1477 /* display one transport per line on subsequent lines */
1478 server = list_entry(v, struct nfs_server, master_link);
1479 clp = server->nfs_client;
1480
1481 snprintf(dev, 8, "%u:%u",
1482 MAJOR(server->s_dev), MINOR(server->s_dev));
1483
1484 snprintf(fsid, 17, "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04001485 (unsigned long long) server->fsid.major,
1486 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04001487
Chuck Lever5d8515c2007-12-10 14:57:16 -05001488 seq_printf(m, "v%u %s %s %-7s %-17s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001489 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001490 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1491 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001492 dev,
1493 fsid);
1494
1495 return 0;
1496}
1497
1498/*
1499 * initialise the /proc/fs/nfsfs/ directory
1500 */
1501int __init nfs_fs_proc_init(void)
1502{
1503 struct proc_dir_entry *p;
1504
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001505 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001506 if (!proc_fs_nfs)
1507 goto error_0;
1508
1509 proc_fs_nfs->owner = THIS_MODULE;
1510
1511 /* a file of servers with which we're dealing */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001512 p = proc_create("servers", S_IFREG|S_IRUGO,
1513 proc_fs_nfs, &nfs_server_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001514 if (!p)
1515 goto error_1;
1516
David Howells6aaca562006-08-22 20:06:13 -04001517 /* a file of volumes that we have mounted */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001518 p = proc_create("volumes", S_IFREG|S_IRUGO,
1519 proc_fs_nfs, &nfs_volume_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001520 if (!p)
1521 goto error_2;
David Howells6aaca562006-08-22 20:06:13 -04001522 return 0;
1523
1524error_2:
1525 remove_proc_entry("servers", proc_fs_nfs);
1526error_1:
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001527 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001528error_0:
1529 return -ENOMEM;
1530}
1531
1532/*
1533 * clean up the /proc/fs/nfsfs/ directory
1534 */
1535void nfs_fs_proc_exit(void)
1536{
1537 remove_proc_entry("volumes", proc_fs_nfs);
1538 remove_proc_entry("servers", proc_fs_nfs);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001539 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001540}
1541
1542#endif /* CONFIG_PROC_FS */