blob: 0870d0d4efc0b15d1a72b212e5acc693d6a90725 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/slab.h>
Trond Myklebust3b0d3f92008-01-03 13:28:58 -050039#include <net/ipv6.h>
David Howells24c8dbb2006-08-22 20:06:10 -040040#include <linux/nfs_xdr.h>
Andy Adamson0b5b7ae2009-04-01 09:23:15 -040041#include <linux/sunrpc/bc_xprt.h>
David Howells24c8dbb2006-08-22 20:06:10 -040042
43#include <asm/system.h>
44
45#include "nfs4_fs.h"
46#include "callback.h"
47#include "delegation.h"
48#include "iostat.h"
49#include "internal.h"
David Howells14727282009-04-03 16:42:42 +010050#include "fscache.h"
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040051#include "pnfs.h"
David Howells24c8dbb2006-08-22 20:06:10 -040052
53#define NFSDBG_FACILITY NFSDBG_CLIENT
54
55static DEFINE_SPINLOCK(nfs_client_lock);
56static LIST_HEAD(nfs_client_list);
David Howells54ceac42006-08-22 20:06:13 -040057static LIST_HEAD(nfs_volume_list);
David Howells24c8dbb2006-08-22 20:06:10 -040058static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
59
60/*
David Howells5006a762006-08-22 20:06:12 -040061 * RPC cruft for NFS
62 */
63static struct rpc_version *nfs_version[5] = {
64 [2] = &nfs_version2,
65#ifdef CONFIG_NFS_V3
66 [3] = &nfs_version3,
67#endif
68#ifdef CONFIG_NFS_V4
69 [4] = &nfs_version4,
70#endif
71};
72
73struct rpc_program nfs_program = {
74 .name = "nfs",
75 .number = NFS_PROGRAM,
76 .nrvers = ARRAY_SIZE(nfs_version),
77 .version = nfs_version,
78 .stats = &nfs_rpcstat,
79 .pipe_dir_name = "/nfs",
80};
81
82struct rpc_stat nfs_rpcstat = {
83 .program = &nfs_program
84};
85
86
87#ifdef CONFIG_NFS_V3_ACL
88static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
89static struct rpc_version * nfsacl_version[] = {
90 [3] = &nfsacl_version3,
91};
92
93struct rpc_program nfsacl_program = {
94 .name = "nfsacl",
95 .number = NFS_ACL_PROGRAM,
96 .nrvers = ARRAY_SIZE(nfsacl_version),
97 .version = nfsacl_version,
98 .stats = &nfsacl_rpcstat,
99};
100#endif /* CONFIG_NFS_V3_ACL */
101
Trond Myklebust3a498022007-12-14 14:56:04 -0500102struct nfs_client_initdata {
103 const char *hostname;
Chuck Leverd7422c42007-12-10 14:58:51 -0500104 const struct sockaddr *addr;
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500105 size_t addrlen;
Trond Myklebust40c553192007-12-14 14:56:07 -0500106 const struct nfs_rpc_ops *rpc_ops;
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500107 int proto;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400108 u32 minorversion;
Trond Myklebust3a498022007-12-14 14:56:04 -0500109};
110
David Howells5006a762006-08-22 20:06:12 -0400111/*
David Howells24c8dbb2006-08-22 20:06:10 -0400112 * Allocate a shared client record
113 *
114 * Since these are allocated/deallocated very rarely, we don't
115 * bother putting them in a slab cache...
116 */
Trond Myklebust3a498022007-12-14 14:56:04 -0500117static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400118{
119 struct nfs_client *clp;
Trond Myklebust7c67db32008-04-07 20:50:11 -0400120 struct rpc_cred *cred;
Chuck Levera21bdd92009-06-17 18:02:10 -0700121 int err = -ENOMEM;
David Howells24c8dbb2006-08-22 20:06:10 -0400122
123 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
124 goto error_0;
125
Trond Myklebust40c553192007-12-14 14:56:07 -0500126 clp->rpc_ops = cl_init->rpc_ops;
127
David Howells24c8dbb2006-08-22 20:06:10 -0400128 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) {
Chuck Levera21bdd92009-06-17 18:02:10 -0700135 err = -ENOMEM;
Trond Myklebust3a498022007-12-14 14:56:04 -0500136 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
David Howells24c8dbb2006-08-22 20:06:10 -0400137 if (!clp->cl_hostname)
Benny Halevy71468512009-04-01 09:22:56 -0400138 goto error_cleanup;
David Howells24c8dbb2006-08-22 20:06:10 -0400139 }
140
141 INIT_LIST_HEAD(&clp->cl_superblocks);
142 clp->cl_rpcclient = ERR_PTR(-EINVAL);
143
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500144 clp->cl_proto = cl_init->proto;
145
David Howells24c8dbb2006-08-22 20:06:10 -0400146#ifdef CONFIG_NFS_V4
David Howells24c8dbb2006-08-22 20:06:10 -0400147 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;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400153 clp->cl_minorversion = cl_init->minorversion;
Trond Myklebust97dc1352010-06-16 09:52:26 -0400154 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
David Howells24c8dbb2006-08-22 20:06:10 -0400155#endif
Trond Myklebust7c67db32008-04-07 20:50:11 -0400156 cred = rpc_lookup_machine_cred();
157 if (!IS_ERR(cred))
158 clp->cl_machine_cred = cred;
Andy Adamson974cec82010-10-20 00:18:02 -0400159#if defined(CONFIG_NFS_V4_1)
160 INIT_LIST_HEAD(&clp->cl_layouts);
161#endif
David Howells14727282009-04-03 16:42:42 +0100162 nfs_fscache_get_client_cookie(clp);
163
David Howells24c8dbb2006-08-22 20:06:10 -0400164 return clp;
165
Benny Halevy71468512009-04-01 09:22:56 -0400166error_cleanup:
David Howells24c8dbb2006-08-22 20:06:10 -0400167 kfree(clp);
168error_0:
Chuck Levera21bdd92009-06-17 18:02:10 -0700169 return ERR_PTR(err);
David Howells24c8dbb2006-08-22 20:06:10 -0400170}
171
Trond Myklebust5dd31772006-08-24 01:03:05 -0400172#ifdef CONFIG_NFS_V4
Benny Halevy9bdaa862009-04-01 09:22:55 -0400173/*
Andy Adamson557134a2009-04-01 09:21:53 -0400174 * Clears/puts all minor version specific parts from an nfs_client struct
175 * reverting it to minorversion 0.
176 */
177static void nfs4_clear_client_minor_version(struct nfs_client *clp)
178{
179#ifdef CONFIG_NFS_V4_1
180 if (nfs4_has_session(clp)) {
181 nfs4_destroy_session(clp->cl_session);
182 clp->cl_session = NULL;
183 }
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400184
Trond Myklebust97dc1352010-06-16 09:52:26 -0400185 clp->cl_mvops = nfs_v4_minor_ops[0];
Andy Adamson557134a2009-04-01 09:21:53 -0400186#endif /* CONFIG_NFS_V4_1 */
187}
188
189/*
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800190 * Destroy the NFS4 callback service
191 */
192static void nfs4_destroy_callback(struct nfs_client *clp)
193{
194 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
Trond Myklebust97dc1352010-06-16 09:52:26 -0400195 nfs_callback_down(clp->cl_mvops->minor_version);
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800196}
197
198static void nfs4_shutdown_client(struct nfs_client *clp)
199{
200 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
201 nfs4_kill_renewd(clp);
202 nfs4_clear_client_minor_version(clp);
203 nfs4_destroy_callback(clp);
204 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
205 nfs_idmap_delete(clp);
206
207 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
208}
209#else
210static void nfs4_shutdown_client(struct nfs_client *clp)
211{
212}
213#endif /* CONFIG_NFS_V4 */
214
215/*
David Howells24c8dbb2006-08-22 20:06:10 -0400216 * Destroy a shared client record
217 */
218static void nfs_free_client(struct nfs_client *clp)
219{
Trond Myklebust40c553192007-12-14 14:56:07 -0500220 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400221
Trond Myklebust5dd31772006-08-24 01:03:05 -0400222 nfs4_shutdown_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400223
David Howells14727282009-04-03 16:42:42 +0100224 nfs_fscache_release_client_cookie(clp);
225
David Howells24c8dbb2006-08-22 20:06:10 -0400226 /* -EIO all pending I/O */
227 if (!IS_ERR(clp->cl_rpcclient))
228 rpc_shutdown_client(clp->cl_rpcclient);
229
Trond Myklebust7c67db32008-04-07 20:50:11 -0400230 if (clp->cl_machine_cred != NULL)
231 put_rpccred(clp->cl_machine_cred);
232
David Howells24c8dbb2006-08-22 20:06:10 -0400233 kfree(clp->cl_hostname);
234 kfree(clp);
235
236 dprintk("<-- nfs_free_client()\n");
237}
238
239/*
240 * Release a reference to a shared client record
241 */
242void nfs_put_client(struct nfs_client *clp)
243{
David Howells27ba8512006-07-30 14:40:56 -0400244 if (!clp)
245 return;
246
David Howells24c8dbb2006-08-22 20:06:10 -0400247 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
248
249 if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) {
250 list_del(&clp->cl_share_link);
251 spin_unlock(&nfs_client_lock);
252
253 BUG_ON(!list_empty(&clp->cl_superblocks));
254
255 nfs_free_client(clp);
256 }
257}
Andy Adamson16b374c2010-10-20 00:18:04 -0400258EXPORT_SYMBOL_GPL(nfs_put_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400259
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500260#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400261/*
262 * Test if two ip6 socket addresses refer to the same socket by
263 * comparing relevant fields. The padding bytes specifically, are not
264 * compared. sin6_flowinfo is not compared because it only affects QoS
265 * and sin6_scope_id is only compared if the address is "link local"
266 * because "link local" addresses need only be unique to a specific
267 * link. Conversely, ordinary unicast addresses might have different
268 * sin6_scope_id.
269 *
270 * The caller should ensure both socket addresses are AF_INET6.
271 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400272static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
273 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400274{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400275 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
276 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400277
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400278 if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL &&
279 sin1->sin6_scope_id != sin2->sin6_scope_id)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400280 return 0;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500281
Trond Myklebustb20d37c2010-09-12 19:55:26 -0400282 return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr);
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500283}
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400284#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
285static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
286 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400287{
288 return 0;
289}
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500290#endif
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500291
David Howells24c8dbb2006-08-22 20:06:10 -0400292/*
Ian Dalld7371c42009-03-10 20:33:22 -0400293 * Test if two ip4 socket addresses refer to the same socket, by
294 * comparing relevant fields. The padding bytes specifically, are
295 * not compared.
296 *
297 * The caller should ensure both socket addresses are AF_INET.
298 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400299static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
300 const struct sockaddr *sa2)
301{
302 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
303 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
304
305 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
306}
307
308static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
309 const struct sockaddr *sa2)
310{
311 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
312 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
313
314 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
315 (sin1->sin6_port == sin2->sin6_port);
316}
317
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400318static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
319 const struct sockaddr *sa2)
Ian Dalld7371c42009-03-10 20:33:22 -0400320{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400321 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
322 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400323
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400324 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
325 (sin1->sin_port == sin2->sin_port);
Ian Dalld7371c42009-03-10 20:33:22 -0400326}
327
328/*
Ian Dalld7371c42009-03-10 20:33:22 -0400329 * Test if two socket addresses represent the same actual socket,
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400330 * by comparing (only) relevant fields, excluding the port number.
331 */
332static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
333 const struct sockaddr *sa2)
334{
335 if (sa1->sa_family != sa2->sa_family)
336 return 0;
337
338 switch (sa1->sa_family) {
339 case AF_INET:
340 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
341 case AF_INET6:
342 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
343 }
344 return 0;
345}
346
347/*
348 * Test if two socket addresses represent the same actual socket,
349 * by comparing (only) relevant fields, including the port number.
Ian Dalld7371c42009-03-10 20:33:22 -0400350 */
351static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
352 const struct sockaddr *sa2)
353{
354 if (sa1->sa_family != sa2->sa_family)
355 return 0;
356
357 switch (sa1->sa_family) {
358 case AF_INET:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400359 return nfs_sockaddr_cmp_ip4(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400360 case AF_INET6:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400361 return nfs_sockaddr_cmp_ip6(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400362 }
363 return 0;
364}
365
366/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500367 * Find a client by IP address and protocol version
368 * - returns NULL if no such client
David Howells24c8dbb2006-08-22 20:06:10 -0400369 */
Chuck Leverff052642007-12-10 14:58:44 -0500370struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
Trond Myklebustc81468a2007-12-14 14:56:05 -0500371{
372 struct nfs_client *clp;
373
374 spin_lock(&nfs_client_lock);
375 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500376 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
377
Trond Myklebustc81468a2007-12-14 14:56:05 -0500378 /* Don't match clients that failed to initialise properly */
Andy Adamson76db6d92009-04-01 09:22:38 -0400379 if (!(clp->cl_cons_state == NFS_CS_READY ||
380 clp->cl_cons_state == NFS_CS_SESSION_INITING))
Trond Myklebustc81468a2007-12-14 14:56:05 -0500381 continue;
382
383 /* Different NFS versions cannot share the same nfs_client */
Trond Myklebust40c553192007-12-14 14:56:07 -0500384 if (clp->rpc_ops->version != nfsversion)
Trond Myklebustc81468a2007-12-14 14:56:05 -0500385 continue;
386
387 /* Match only the IP address, not the port number */
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500388 if (!nfs_sockaddr_match_ipaddr(addr, clap))
Trond Myklebustc81468a2007-12-14 14:56:05 -0500389 continue;
390
391 atomic_inc(&clp->cl_count);
392 spin_unlock(&nfs_client_lock);
393 return clp;
394 }
395 spin_unlock(&nfs_client_lock);
396 return NULL;
397}
398
399/*
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500400 * Find a client by IP address and protocol version
401 * - returns NULL if no such client
402 */
403struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
404{
405 struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
406 u32 nfsvers = clp->rpc_ops->version;
407
408 spin_lock(&nfs_client_lock);
409 list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
410 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
411
412 /* Don't match clients that failed to initialise properly */
413 if (clp->cl_cons_state != NFS_CS_READY)
414 continue;
415
416 /* Different NFS versions cannot share the same nfs_client */
417 if (clp->rpc_ops->version != nfsvers)
418 continue;
419
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500420 /* Match only the IP address, not the port number */
421 if (!nfs_sockaddr_match_ipaddr(sap, clap))
422 continue;
423
424 atomic_inc(&clp->cl_count);
425 spin_unlock(&nfs_client_lock);
426 return clp;
427 }
428 spin_unlock(&nfs_client_lock);
429 return NULL;
430}
431
432/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500433 * Find an nfs_client on the list that matches the initialisation data
434 * that is supplied.
435 */
436static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400437{
438 struct nfs_client *clp;
Ian Dalld7371c42009-03-10 20:33:22 -0400439 const struct sockaddr *sap = data->addr;
David Howells24c8dbb2006-08-22 20:06:10 -0400440
441 list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
Ian Dalld7371c42009-03-10 20:33:22 -0400442 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebust13bbc062006-10-19 23:28:40 -0700443 /* Don't match clients that failed to initialise properly */
444 if (clp->cl_cons_state < 0)
445 continue;
446
David Howells24c8dbb2006-08-22 20:06:10 -0400447 /* Different NFS versions cannot share the same nfs_client */
Trond Myklebust40c553192007-12-14 14:56:07 -0500448 if (clp->rpc_ops != data->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400449 continue;
450
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500451 if (clp->cl_proto != data->proto)
452 continue;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400453 /* Match nfsv4 minorversion */
454 if (clp->cl_minorversion != data->minorversion)
455 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500456 /* Match the full socket address */
Ian Dalld7371c42009-03-10 20:33:22 -0400457 if (!nfs_sockaddr_cmp(sap, clap))
David Howells24c8dbb2006-08-22 20:06:10 -0400458 continue;
459
Trond Myklebustc81468a2007-12-14 14:56:05 -0500460 atomic_inc(&clp->cl_count);
461 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400462 }
David Howells24c8dbb2006-08-22 20:06:10 -0400463 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400464}
465
466/*
467 * Look up a client by IP address and protocol version
468 * - creates a new record if one doesn't yet exist
469 */
Trond Myklebust3a498022007-12-14 14:56:04 -0500470static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400471{
472 struct nfs_client *clp, *new = NULL;
473 int error;
474
Chuck Leverd7422c42007-12-10 14:58:51 -0500475 dprintk("--> nfs_get_client(%s,v%u)\n",
476 cl_init->hostname ?: "", cl_init->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400477
478 /* see if the client already exists */
479 do {
480 spin_lock(&nfs_client_lock);
481
Trond Myklebustc81468a2007-12-14 14:56:05 -0500482 clp = nfs_match_client(cl_init);
David Howells24c8dbb2006-08-22 20:06:10 -0400483 if (clp)
484 goto found_client;
485 if (new)
486 goto install_client;
487
488 spin_unlock(&nfs_client_lock);
489
Trond Myklebust3a498022007-12-14 14:56:04 -0500490 new = nfs_alloc_client(cl_init);
Chuck Levera21bdd92009-06-17 18:02:10 -0700491 } while (!IS_ERR(new));
David Howells24c8dbb2006-08-22 20:06:10 -0400492
Chuck Levera21bdd92009-06-17 18:02:10 -0700493 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
494 return new;
David Howells24c8dbb2006-08-22 20:06:10 -0400495
496 /* install a new client and return with it unready */
497install_client:
498 clp = new;
499 list_add(&clp->cl_share_link, &nfs_client_list);
500 spin_unlock(&nfs_client_lock);
501 dprintk("--> nfs_get_client() = %p [new]\n", clp);
502 return clp;
503
504 /* found an existing client
505 * - make sure it's ready before returning
506 */
507found_client:
508 spin_unlock(&nfs_client_lock);
509
510 if (new)
511 nfs_free_client(new);
512
Matthew Wilcox150030b2007-12-06 16:24:39 -0500513 error = wait_event_killable(nfs_client_active_wq,
Andy Adamson76db6d92009-04-01 09:22:38 -0400514 clp->cl_cons_state < NFS_CS_INITING);
Trond Myklebust0bae89e2006-10-08 14:33:24 -0400515 if (error < 0) {
516 nfs_put_client(clp);
517 return ERR_PTR(-ERESTARTSYS);
David Howells24c8dbb2006-08-22 20:06:10 -0400518 }
519
520 if (clp->cl_cons_state < NFS_CS_READY) {
521 error = clp->cl_cons_state;
522 nfs_put_client(clp);
523 return ERR_PTR(error);
524 }
525
David Howells54ceac42006-08-22 20:06:13 -0400526 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
527
David Howells24c8dbb2006-08-22 20:06:10 -0400528 dprintk("--> nfs_get_client() = %p [share]\n", clp);
529 return clp;
530}
531
532/*
533 * Mark a server as ready or failed
534 */
Andy Adamson76db6d92009-04-01 09:22:38 -0400535void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400536{
537 clp->cl_cons_state = state;
538 wake_up_all(&nfs_client_active_wq);
539}
David Howells5006a762006-08-22 20:06:12 -0400540
541/*
Benny Halevy008f55d2009-04-01 09:22:50 -0400542 * With sessions, the client is not marked ready until after a
543 * successful EXCHANGE_ID and CREATE_SESSION.
544 *
545 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
546 * other versions of NFS can be tried.
547 */
548int nfs4_check_client_ready(struct nfs_client *clp)
549{
550 if (!nfs4_has_session(clp))
551 return 0;
552 if (clp->cl_cons_state < NFS_CS_READY)
553 return -EPROTONOSUPPORT;
554 return 0;
555}
556
557/*
David Howells5006a762006-08-22 20:06:12 -0400558 * Initialise the timeout values for a connection
559 */
560static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
561 unsigned int timeo, unsigned int retrans)
562{
563 to->to_initval = timeo * HZ / 10;
564 to->to_retries = retrans;
David Howells5006a762006-08-22 20:06:12 -0400565
566 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400567 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400568 case XPRT_TRANSPORT_RDMA:
Trond Myklebust259875e2008-07-02 14:43:47 -0400569 if (to->to_retries == 0)
570 to->to_retries = NFS_DEF_TCP_RETRANS;
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500571 if (to->to_initval == 0)
Trond Myklebust259875e2008-07-02 14:43:47 -0400572 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400573 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
574 to->to_initval = NFS_MAX_TCP_TIMEOUT;
575 to->to_increment = to->to_initval;
576 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500577 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
578 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
579 if (to->to_maxval < to->to_initval)
580 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400581 to->to_exponential = 0;
582 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400583 case XPRT_TRANSPORT_UDP:
Trond Myklebust259875e2008-07-02 14:43:47 -0400584 if (to->to_retries == 0)
585 to->to_retries = NFS_DEF_UDP_RETRANS;
David Howells5006a762006-08-22 20:06:12 -0400586 if (!to->to_initval)
Trond Myklebust259875e2008-07-02 14:43:47 -0400587 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400588 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
589 to->to_initval = NFS_MAX_UDP_TIMEOUT;
590 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
591 to->to_exponential = 1;
592 break;
Trond Myklebust259875e2008-07-02 14:43:47 -0400593 default:
594 BUG();
David Howells5006a762006-08-22 20:06:12 -0400595 }
596}
597
598/*
599 * Create an RPC client handle
600 */
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500601static int nfs_create_rpc_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500602 const struct rpc_timeout *timeparms,
603 rpc_authflavor_t flavor,
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500604 int discrtry, int noresvport)
David Howells5006a762006-08-22 20:06:12 -0400605{
David Howells5006a762006-08-22 20:06:12 -0400606 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400607 struct rpc_create_args args = {
Pavel Emelyanovc653ce32010-09-29 16:04:45 +0400608 .net = &init_net,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500609 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400610 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500611 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500612 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400613 .servername = clp->cl_hostname,
614 .program = &nfs_program,
615 .version = clp->rpc_ops->version,
616 .authflavor = flavor,
617 };
David Howells5006a762006-08-22 20:06:12 -0400618
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500619 if (discrtry)
620 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
621 if (noresvport)
622 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
623
David Howells5006a762006-08-22 20:06:12 -0400624 if (!IS_ERR(clp->cl_rpcclient))
625 return 0;
626
Chuck Lever41877d22006-08-22 20:06:20 -0400627 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400628 if (IS_ERR(clnt)) {
629 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700630 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400631 return PTR_ERR(clnt);
632 }
633
David Howells5006a762006-08-22 20:06:12 -0400634 clp->cl_rpcclient = clnt;
635 return 0;
636}
David Howells54ceac42006-08-22 20:06:13 -0400637
638/*
639 * Version 2 or 3 client destruction
640 */
641static void nfs_destroy_server(struct nfs_server *server)
642{
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400643 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
644 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500645 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400646}
647
648/*
649 * Version 2 or 3 lockd setup
650 */
651static int nfs_start_lockd(struct nfs_server *server)
652{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500653 struct nlm_host *host;
654 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500655 struct nlmclnt_initdata nlm_init = {
656 .hostname = clp->cl_hostname,
657 .address = (struct sockaddr *)&clp->cl_addr,
658 .addrlen = clp->cl_addrlen,
Chuck Lever883bb162008-01-15 16:04:20 -0500659 .nfs_version = clp->rpc_ops->version,
Chuck Lever0cb26592008-12-23 15:21:38 -0500660 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
661 1 : 0,
Chuck Lever883bb162008-01-15 16:04:20 -0500662 };
David Howells54ceac42006-08-22 20:06:13 -0400663
Chuck Lever883bb162008-01-15 16:04:20 -0500664 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500665 return 0;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400666 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
667 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500668 return 0;
669
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400670 switch (clp->cl_proto) {
671 default:
672 nlm_init.protocol = IPPROTO_TCP;
673 break;
674 case XPRT_TRANSPORT_UDP:
675 nlm_init.protocol = IPPROTO_UDP;
676 }
677
Chuck Lever883bb162008-01-15 16:04:20 -0500678 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500679 if (IS_ERR(host))
680 return PTR_ERR(host);
681
682 server->nlm_host = host;
683 server->destroy = nfs_destroy_server;
684 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400685}
686
687/*
688 * Initialise an NFSv3 ACL client connection
689 */
690#ifdef CONFIG_NFS_V3_ACL
691static void nfs_init_server_aclclient(struct nfs_server *server)
692{
Trond Myklebust40c553192007-12-14 14:56:07 -0500693 if (server->nfs_client->rpc_ops->version != 3)
David Howells54ceac42006-08-22 20:06:13 -0400694 goto out_noacl;
695 if (server->flags & NFS_MOUNT_NOACL)
696 goto out_noacl;
697
698 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
699 if (IS_ERR(server->client_acl))
700 goto out_noacl;
701
702 /* No errors! Assume that Sun nfsacls are supported */
703 server->caps |= NFS_CAP_ACLS;
704 return;
705
706out_noacl:
707 server->caps &= ~NFS_CAP_ACLS;
708}
709#else
710static inline void nfs_init_server_aclclient(struct nfs_server *server)
711{
712 server->flags &= ~NFS_MOUNT_NOACL;
713 server->caps &= ~NFS_CAP_ACLS;
714}
715#endif
716
717/*
718 * Create a general RPC client
719 */
Trond Myklebust33170232007-12-20 16:03:59 -0500720static int nfs_init_server_rpcclient(struct nfs_server *server,
721 const struct rpc_timeout *timeo,
722 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400723{
724 struct nfs_client *clp = server->nfs_client;
725
726 server->client = rpc_clone_client(clp->cl_rpcclient);
727 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700728 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400729 return PTR_ERR(server->client);
730 }
731
Trond Myklebust33170232007-12-20 16:03:59 -0500732 memcpy(&server->client->cl_timeout_default,
733 timeo,
734 sizeof(server->client->cl_timeout_default));
735 server->client->cl_timeout = &server->client->cl_timeout_default;
736
David Howells54ceac42006-08-22 20:06:13 -0400737 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
738 struct rpc_auth *auth;
739
740 auth = rpcauth_create(pseudoflavour, server->client);
741 if (IS_ERR(auth)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700742 dprintk("%s: couldn't create credcache!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400743 return PTR_ERR(auth);
744 }
745 }
746 server->client->cl_softrtry = 0;
747 if (server->flags & NFS_MOUNT_SOFT)
748 server->client->cl_softrtry = 1;
749
David Howells54ceac42006-08-22 20:06:13 -0400750 return 0;
751}
752
753/*
754 * Initialise an NFS2 or NFS3 client
755 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400756static int nfs_init_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500757 const struct rpc_timeout *timeparms,
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400758 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -0400759{
David Howells54ceac42006-08-22 20:06:13 -0400760 int error;
761
762 if (clp->cl_cons_state == NFS_CS_READY) {
763 /* the client is already initialised */
764 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
765 return 0;
766 }
767
David Howells54ceac42006-08-22 20:06:13 -0400768 /*
769 * Create a client RPC handle for doing FSSTAT with UNIX auth only
770 * - RFC 2623, sec 2.3.2
771 */
Chuck Leverd7403512008-12-23 15:21:37 -0500772 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
773 0, data->flags & NFS_MOUNT_NORESVPORT);
David Howells54ceac42006-08-22 20:06:13 -0400774 if (error < 0)
775 goto error;
776 nfs_mark_client_ready(clp, NFS_CS_READY);
777 return 0;
778
779error:
780 nfs_mark_client_ready(clp, error);
781 dprintk("<-- nfs_init_client() = xerror %d\n", error);
782 return error;
783}
784
785/*
786 * Create a version 2 or 3 client
787 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400788static int nfs_init_server(struct nfs_server *server,
789 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -0400790{
Trond Myklebust3a498022007-12-14 14:56:04 -0500791 struct nfs_client_initdata cl_init = {
792 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500793 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500794 .addrlen = data->nfs_server.addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -0500795 .rpc_ops = &nfs_v2_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500796 .proto = data->nfs_server.protocol,
Trond Myklebust3a498022007-12-14 14:56:04 -0500797 };
Trond Myklebust33170232007-12-20 16:03:59 -0500798 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400799 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500800 int error;
David Howells54ceac42006-08-22 20:06:13 -0400801
802 dprintk("--> nfs_init_server()\n");
803
804#ifdef CONFIG_NFS_V3
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400805 if (data->version == 3)
Trond Myklebust40c553192007-12-14 14:56:07 -0500806 cl_init.rpc_ops = &nfs_v3_clientops;
David Howells54ceac42006-08-22 20:06:13 -0400807#endif
808
809 /* Allocate or find a client reference we can use */
Trond Myklebust3a498022007-12-14 14:56:04 -0500810 clp = nfs_get_client(&cl_init);
David Howells54ceac42006-08-22 20:06:13 -0400811 if (IS_ERR(clp)) {
812 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
813 return PTR_ERR(clp);
814 }
815
Trond Myklebust33170232007-12-20 16:03:59 -0500816 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
817 data->timeo, data->retrans);
818 error = nfs_init_client(clp, &timeparms, data);
David Howells54ceac42006-08-22 20:06:13 -0400819 if (error < 0)
820 goto error;
821
822 server->nfs_client = clp;
823
824 /* Initialise the client representation from the mount data */
Trond Myklebustff3525a2008-08-15 16:59:14 -0400825 server->flags = data->flags;
David Howellsb797cac2009-04-03 16:42:48 +0100826 server->options = data->options;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400827 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
828 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
829 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
David Howells54ceac42006-08-22 20:06:13 -0400830
831 if (data->rsize)
832 server->rsize = nfs_block_size(data->rsize, NULL);
833 if (data->wsize)
834 server->wsize = nfs_block_size(data->wsize, NULL);
835
836 server->acregmin = data->acregmin * HZ;
837 server->acregmax = data->acregmax * HZ;
838 server->acdirmin = data->acdirmin * HZ;
839 server->acdirmax = data->acdirmax * HZ;
840
841 /* Start lockd here, before we might error out */
842 error = nfs_start_lockd(server);
843 if (error < 0)
844 goto error;
845
Chuck Leverf22d6d72008-03-14 14:10:22 -0400846 server->port = data->nfs_server.port;
847
Trond Myklebust33170232007-12-20 16:03:59 -0500848 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -0400849 if (error < 0)
850 goto error;
851
Chuck Lever3f8400d2008-03-14 14:10:30 -0400852 /* Preserve the values of mount_server-related mount options */
853 if (data->mount_server.addrlen) {
854 memcpy(&server->mountd_address, &data->mount_server.address,
855 data->mount_server.addrlen);
856 server->mountd_addrlen = data->mount_server.addrlen;
857 }
858 server->mountd_version = data->mount_server.version;
859 server->mountd_port = data->mount_server.port;
860 server->mountd_protocol = data->mount_server.protocol;
861
David Howells54ceac42006-08-22 20:06:13 -0400862 server->namelen = data->namlen;
863 /* Create a client RPC handle for the NFSv3 ACL management interface */
864 nfs_init_server_aclclient(server);
David Howells54ceac42006-08-22 20:06:13 -0400865 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
866 return 0;
867
868error:
869 server->nfs_client = NULL;
870 nfs_put_client(clp);
871 dprintk("<-- nfs_init_server() = xerror %d\n", error);
872 return error;
873}
874
875/*
876 * Load up the server record from information gained in an fsinfo record
877 */
878static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
879{
880 unsigned long max_rpc_payload;
881
882 /* Work out a lot of parameters */
883 if (server->rsize == 0)
884 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
885 if (server->wsize == 0)
886 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
887
888 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
889 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
890 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
891 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
892
893 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
894 if (server->rsize > max_rpc_payload)
895 server->rsize = max_rpc_payload;
896 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
897 server->rsize = NFS_MAX_FILE_IO_SIZE;
898 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700899
Jens Axboed9938312009-06-12 14:45:52 +0200900 server->backing_dev_info.name = "nfs";
David Howells54ceac42006-08-22 20:06:13 -0400901 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
902
903 if (server->wsize > max_rpc_payload)
904 server->wsize = max_rpc_payload;
905 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
906 server->wsize = NFS_MAX_FILE_IO_SIZE;
907 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400908 set_pnfs_layoutdriver(server, fsinfo->layouttype);
909
David Howells54ceac42006-08-22 20:06:13 -0400910 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
911
912 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -0400913 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
914 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
David Howells54ceac42006-08-22 20:06:13 -0400915 if (server->dtsize > server->rsize)
916 server->dtsize = server->rsize;
917
918 if (server->flags & NFS_MOUNT_NOAC) {
919 server->acregmin = server->acregmax = 0;
920 server->acdirmin = server->acdirmax = 0;
921 }
922
923 server->maxfilesize = fsinfo->maxfilesize;
924
Ricardo Labiaga6b967242010-10-12 16:30:05 -0700925 server->time_delta = fsinfo->time_delta;
926
David Howells54ceac42006-08-22 20:06:13 -0400927 /* We're airborne Set socket buffersize */
928 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
929}
930
931/*
932 * Probe filesystem information, including the FSID on v2/v3
933 */
934static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
935{
936 struct nfs_fsinfo fsinfo;
937 struct nfs_client *clp = server->nfs_client;
938 int error;
939
940 dprintk("--> nfs_probe_fsinfo()\n");
941
942 if (clp->rpc_ops->set_capabilities != NULL) {
943 error = clp->rpc_ops->set_capabilities(server, mntfh);
944 if (error < 0)
945 goto out_error;
946 }
947
948 fsinfo.fattr = fattr;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400949 fsinfo.layouttype = 0;
David Howells54ceac42006-08-22 20:06:13 -0400950 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
951 if (error < 0)
952 goto out_error;
953
954 nfs_server_set_fsinfo(server, &fsinfo);
955
956 /* Get some general file system info */
957 if (server->namelen == 0) {
958 struct nfs_pathconf pathinfo;
959
960 pathinfo.fattr = fattr;
961 nfs_fattr_init(fattr);
962
963 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
964 server->namelen = pathinfo.max_namelen;
965 }
966
967 dprintk("<-- nfs_probe_fsinfo() = 0\n");
968 return 0;
969
970out_error:
971 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
972 return error;
973}
974
975/*
976 * Copy useful information when duplicating a server record
977 */
978static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
979{
980 target->flags = source->flags;
Chuck Lever356e76b2010-04-22 15:35:56 -0400981 target->rsize = source->rsize;
982 target->wsize = source->wsize;
David Howells54ceac42006-08-22 20:06:13 -0400983 target->acregmin = source->acregmin;
984 target->acregmax = source->acregmax;
985 target->acdirmin = source->acdirmin;
986 target->acdirmax = source->acdirmax;
987 target->caps = source->caps;
David Howells2df54802009-09-23 14:36:39 -0400988 target->options = source->options;
David Howells54ceac42006-08-22 20:06:13 -0400989}
990
991/*
992 * Allocate and initialise a server record
993 */
994static struct nfs_server *nfs_alloc_server(void)
995{
996 struct nfs_server *server;
997
998 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
999 if (!server)
1000 return NULL;
1001
1002 server->client = server->client_acl = ERR_PTR(-EINVAL);
1003
1004 /* Zero out the NFS state stuff */
1005 INIT_LIST_HEAD(&server->client_link);
1006 INIT_LIST_HEAD(&server->master_link);
1007
Steve Dicksonef818a22007-11-08 04:05:04 -05001008 atomic_set(&server->active, 0);
1009
David Howells54ceac42006-08-22 20:06:13 -04001010 server->io_stats = nfs_alloc_iostats();
1011 if (!server->io_stats) {
1012 kfree(server);
1013 return NULL;
1014 }
1015
Jens Axboe48d07642009-09-21 09:59:39 +02001016 if (bdi_init(&server->backing_dev_info)) {
1017 nfs_free_iostats(server->io_stats);
1018 kfree(server);
1019 return NULL;
1020 }
1021
David Howells54ceac42006-08-22 20:06:13 -04001022 return server;
1023}
1024
1025/*
1026 * Free up a server record
1027 */
1028void nfs_free_server(struct nfs_server *server)
1029{
1030 dprintk("--> nfs_free_server()\n");
1031
Ricardo Labiaga85e174b2010-10-20 00:17:58 -04001032 unset_pnfs_layoutdriver(server);
David Howells54ceac42006-08-22 20:06:13 -04001033 spin_lock(&nfs_client_lock);
1034 list_del(&server->client_link);
1035 list_del(&server->master_link);
1036 spin_unlock(&nfs_client_lock);
1037
1038 if (server->destroy != NULL)
1039 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -05001040
1041 if (!IS_ERR(server->client_acl))
1042 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -04001043 if (!IS_ERR(server->client))
1044 rpc_shutdown_client(server->client);
1045
1046 nfs_put_client(server->nfs_client);
1047
1048 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -07001049 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -04001050 kfree(server);
1051 nfs_release_automount_timer();
1052 dprintk("<-- nfs_free_server()\n");
1053}
1054
1055/*
1056 * Create a version 2 or 3 volume record
1057 * - keyed on server and FSID
1058 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04001059struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -04001060 struct nfs_fh *mntfh)
1061{
1062 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001063 struct nfs_fattr *fattr;
David Howells54ceac42006-08-22 20:06:13 -04001064 int error;
1065
1066 server = nfs_alloc_server();
1067 if (!server)
1068 return ERR_PTR(-ENOMEM);
1069
Trond Myklebustfbca7792010-04-16 16:22:46 -04001070 error = -ENOMEM;
1071 fattr = nfs_alloc_fattr();
1072 if (fattr == NULL)
1073 goto error;
1074
David Howells54ceac42006-08-22 20:06:13 -04001075 /* Get a client representation */
1076 error = nfs_init_server(server, data);
1077 if (error < 0)
1078 goto error;
1079
1080 BUG_ON(!server->nfs_client);
1081 BUG_ON(!server->nfs_client->rpc_ops);
1082 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1083
1084 /* Probe the root fh to retrieve its FSID */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001085 error = nfs_probe_fsinfo(server, mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001086 if (error < 0)
1087 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001088 if (server->nfs_client->rpc_ops->version == 3) {
1089 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1090 server->namelen = NFS3_MAXNAMLEN;
1091 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1092 server->caps |= NFS_CAP_READDIRPLUS;
1093 } else {
1094 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1095 server->namelen = NFS2_MAXNAMLEN;
1096 }
1097
Trond Myklebustfbca7792010-04-16 16:22:46 -04001098 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1099 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001100 if (error < 0) {
1101 dprintk("nfs_create_server: getattr error = %d\n", -error);
1102 goto error;
1103 }
1104 }
Trond Myklebustfbca7792010-04-16 16:22:46 -04001105 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
David Howells54ceac42006-08-22 20:06:13 -04001106
David Howells6daabf12006-08-24 15:44:16 -04001107 dprintk("Server FSID: %llx:%llx\n",
1108 (unsigned long long) server->fsid.major,
1109 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001110
David Howells54ceac42006-08-22 20:06:13 -04001111 spin_lock(&nfs_client_lock);
1112 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1113 list_add_tail(&server->master_link, &nfs_volume_list);
1114 spin_unlock(&nfs_client_lock);
1115
1116 server->mount_time = jiffies;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001117 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001118 return server;
1119
1120error:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001121 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001122 nfs_free_server(server);
1123 return ERR_PTR(error);
1124}
1125
1126#ifdef CONFIG_NFS_V4
1127/*
Benny Halevy9bdaa862009-04-01 09:22:55 -04001128 * Initialize the NFS4 callback service
1129 */
1130static int nfs4_init_callback(struct nfs_client *clp)
1131{
1132 int error;
1133
1134 if (clp->rpc_ops->version == 4) {
Andy Adamson0b5b7ae2009-04-01 09:23:15 -04001135 if (nfs4_has_session(clp)) {
1136 error = xprt_setup_backchannel(
1137 clp->cl_rpcclient->cl_xprt,
1138 NFS41_BC_MIN_CALLBACKS);
1139 if (error < 0)
1140 return error;
1141 }
1142
Trond Myklebust97dc1352010-06-16 09:52:26 -04001143 error = nfs_callback_up(clp->cl_mvops->minor_version,
Benny Halevy71468512009-04-01 09:22:56 -04001144 clp->cl_rpcclient->cl_xprt);
Benny Halevy9bdaa862009-04-01 09:22:55 -04001145 if (error < 0) {
1146 dprintk("%s: failed to start callback. Error = %d\n",
1147 __func__, error);
1148 return error;
1149 }
1150 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1151 }
1152 return 0;
1153}
1154
1155/*
Andy Adamson557134a2009-04-01 09:21:53 -04001156 * Initialize the minor version specific parts of an NFS4 client record
1157 */
1158static int nfs4_init_client_minor_version(struct nfs_client *clp)
1159{
1160#if defined(CONFIG_NFS_V4_1)
Trond Myklebust97dc1352010-06-16 09:52:26 -04001161 if (clp->cl_mvops->minor_version) {
Andy Adamson557134a2009-04-01 09:21:53 -04001162 struct nfs4_session *session = NULL;
1163 /*
1164 * Create the session and mark it expired.
1165 * When a SEQUENCE operation encounters the expired session
1166 * it will do session recovery to initialize it.
1167 */
1168 session = nfs4_alloc_session(clp);
1169 if (!session)
1170 return -ENOMEM;
1171
1172 clp->cl_session = session;
Trond Myklebustfe74ba32010-06-16 09:52:27 -04001173 /*
1174 * The create session reply races with the server back
1175 * channel probe. Mark the client NFS_CS_SESSION_INITING
1176 * so that the client back channel can find the
1177 * nfs_client struct
1178 */
1179 clp->cl_cons_state = NFS_CS_SESSION_INITING;
Andy Adamson557134a2009-04-01 09:21:53 -04001180 }
1181#endif /* CONFIG_NFS_V4_1 */
1182
Benny Halevy71468512009-04-01 09:22:56 -04001183 return nfs4_init_callback(clp);
Andy Adamson557134a2009-04-01 09:21:53 -04001184}
1185
1186/*
David Howells54ceac42006-08-22 20:06:13 -04001187 * Initialise an NFS4 client record
1188 */
1189static int nfs4_init_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -05001190 const struct rpc_timeout *timeparms,
J. Bruce Fields7d9ac062006-10-19 23:28:39 -07001191 const char *ip_addr,
Chuck Leverd7403512008-12-23 15:21:37 -05001192 rpc_authflavor_t authflavour,
1193 int flags)
David Howells54ceac42006-08-22 20:06:13 -04001194{
1195 int error;
1196
1197 if (clp->cl_cons_state == NFS_CS_READY) {
1198 /* the client is initialised already */
1199 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1200 return 0;
1201 }
1202
1203 /* Check NFS protocol revision and initialize RPC op vector */
1204 clp->rpc_ops = &nfs_v4_clientops;
1205
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001206 error = nfs_create_rpc_client(clp, timeparms, authflavour,
Chuck Leverd7403512008-12-23 15:21:37 -05001207 1, flags & NFS_MOUNT_NORESVPORT);
David Howells54ceac42006-08-22 20:06:13 -04001208 if (error < 0)
1209 goto error;
Ben Hutchingsf4373bf2009-10-06 15:42:18 -04001210 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
David Howells54ceac42006-08-22 20:06:13 -04001211
1212 error = nfs_idmap_new(clp);
1213 if (error < 0) {
1214 dprintk("%s: failed to create idmapper. Error = %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001215 __func__, error);
David Howells54ceac42006-08-22 20:06:13 -04001216 goto error;
1217 }
Trond Myklebust9c5bf382006-08-22 20:06:14 -04001218 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
David Howells54ceac42006-08-22 20:06:13 -04001219
Andy Adamson557134a2009-04-01 09:21:53 -04001220 error = nfs4_init_client_minor_version(clp);
1221 if (error < 0)
1222 goto error;
1223
Andy Adamson76db6d92009-04-01 09:22:38 -04001224 if (!nfs4_has_session(clp))
1225 nfs_mark_client_ready(clp, NFS_CS_READY);
David Howells54ceac42006-08-22 20:06:13 -04001226 return 0;
1227
1228error:
1229 nfs_mark_client_ready(clp, error);
1230 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1231 return error;
1232}
1233
1234/*
1235 * Set up an NFS4 client
1236 */
1237static int nfs4_set_client(struct nfs_server *server,
Chuck Leverdcecae02007-12-10 14:58:59 -05001238 const char *hostname,
1239 const struct sockaddr *addr,
1240 const size_t addrlen,
J. Bruce Fields7d9ac062006-10-19 23:28:39 -07001241 const char *ip_addr,
David Howells54ceac42006-08-22 20:06:13 -04001242 rpc_authflavor_t authflavour,
Benny Halevy94a417f2009-04-01 09:21:49 -04001243 int proto, const struct rpc_timeout *timeparms,
1244 u32 minorversion)
David Howells54ceac42006-08-22 20:06:13 -04001245{
Trond Myklebust3a498022007-12-14 14:56:04 -05001246 struct nfs_client_initdata cl_init = {
1247 .hostname = hostname,
Chuck Leverdcecae02007-12-10 14:58:59 -05001248 .addr = addr,
1249 .addrlen = addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -05001250 .rpc_ops = &nfs_v4_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001251 .proto = proto,
Benny Halevy5aae4a92009-04-01 09:21:50 -04001252 .minorversion = minorversion,
Trond Myklebust3a498022007-12-14 14:56:04 -05001253 };
David Howells54ceac42006-08-22 20:06:13 -04001254 struct nfs_client *clp;
1255 int error;
1256
1257 dprintk("--> nfs4_set_client()\n");
1258
1259 /* Allocate or find a client reference we can use */
Trond Myklebust3a498022007-12-14 14:56:04 -05001260 clp = nfs_get_client(&cl_init);
David Howells54ceac42006-08-22 20:06:13 -04001261 if (IS_ERR(clp)) {
1262 error = PTR_ERR(clp);
1263 goto error;
1264 }
Chuck Leverd7403512008-12-23 15:21:37 -05001265 error = nfs4_init_client(clp, timeparms, ip_addr, authflavour,
1266 server->flags);
David Howells54ceac42006-08-22 20:06:13 -04001267 if (error < 0)
1268 goto error_put;
1269
1270 server->nfs_client = clp;
1271 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1272 return 0;
1273
1274error_put:
1275 nfs_put_client(clp);
1276error:
1277 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1278 return error;
1279}
1280
Andy Adamson557134a2009-04-01 09:21:53 -04001281
1282/*
Andy Adamson96b09e02009-04-01 09:22:33 -04001283 * Session has been established, and the client marked ready.
1284 * Set the mount rsize and wsize with negotiated fore channel
1285 * attributes which will be bound checked in nfs_server_set_fsinfo.
1286 */
1287static void nfs4_session_set_rwsize(struct nfs_server *server)
1288{
1289#ifdef CONFIG_NFS_V4_1
Alexandros Batsakis2449ea22009-12-05 13:36:55 -05001290 struct nfs4_session *sess;
1291 u32 server_resp_sz;
1292 u32 server_rqst_sz;
1293
Andy Adamson96b09e02009-04-01 09:22:33 -04001294 if (!nfs4_has_session(server->nfs_client))
1295 return;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -05001296 sess = server->nfs_client->cl_session;
1297 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1298 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1299
1300 if (server->rsize > server_resp_sz)
1301 server->rsize = server_resp_sz;
1302 if (server->wsize > server_rqst_sz)
1303 server->wsize = server_rqst_sz;
Andy Adamson96b09e02009-04-01 09:22:33 -04001304#endif /* CONFIG_NFS_V4_1 */
1305}
1306
Trond Myklebust44950b62010-06-17 11:45:12 -04001307static int nfs4_server_common_setup(struct nfs_server *server,
1308 struct nfs_fh *mntfh)
1309{
1310 struct nfs_fattr *fattr;
1311 int error;
1312
1313 BUG_ON(!server->nfs_client);
1314 BUG_ON(!server->nfs_client->rpc_ops);
1315 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1316
1317 fattr = nfs_alloc_fattr();
1318 if (fattr == NULL)
1319 return -ENOMEM;
1320
1321 /* We must ensure the session is initialised first */
1322 error = nfs4_init_session(server);
1323 if (error < 0)
1324 goto out;
1325
1326 /* Probe the root fh to retrieve its FSID and filehandle */
1327 error = nfs4_get_rootfh(server, mntfh);
1328 if (error < 0)
1329 goto out;
1330
1331 dprintk("Server FSID: %llx:%llx\n",
1332 (unsigned long long) server->fsid.major,
1333 (unsigned long long) server->fsid.minor);
1334 dprintk("Mount FH: %d\n", mntfh->size);
1335
1336 nfs4_session_set_rwsize(server);
1337
1338 error = nfs_probe_fsinfo(server, mntfh, fattr);
1339 if (error < 0)
1340 goto out;
1341
1342 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1343 server->namelen = NFS4_MAXNAMLEN;
1344
1345 spin_lock(&nfs_client_lock);
1346 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1347 list_add_tail(&server->master_link, &nfs_volume_list);
1348 spin_unlock(&nfs_client_lock);
1349
1350 server->mount_time = jiffies;
1351out:
1352 nfs_free_fattr(fattr);
1353 return error;
1354}
1355
Andy Adamson96b09e02009-04-01 09:22:33 -04001356/*
David Howells54ceac42006-08-22 20:06:13 -04001357 * Create a version 4 volume record
1358 */
1359static int nfs4_init_server(struct nfs_server *server,
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001360 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -04001361{
Trond Myklebust33170232007-12-20 16:03:59 -05001362 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -04001363 int error;
1364
1365 dprintk("--> nfs4_init_server()\n");
1366
Trond Myklebust33170232007-12-20 16:03:59 -05001367 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1368 data->timeo, data->retrans);
1369
Chuck Lever542fcc32008-12-23 15:21:36 -05001370 /* Initialise the client representation from the mount data */
1371 server->flags = data->flags;
Bryan Schumaker82f2e542010-10-21 16:33:18 -04001372 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1373 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1374 server->caps |= NFS_CAP_READDIRPLUS;
David Howellsb797cac2009-04-03 16:42:48 +01001375 server->options = data->options;
Chuck Lever542fcc32008-12-23 15:21:36 -05001376
Trond Myklebust33170232007-12-20 16:03:59 -05001377 /* Get a client record */
1378 error = nfs4_set_client(server,
1379 data->nfs_server.hostname,
1380 (const struct sockaddr *)&data->nfs_server.address,
1381 data->nfs_server.addrlen,
1382 data->client_address,
1383 data->auth_flavors[0],
1384 data->nfs_server.protocol,
Benny Halevy94a417f2009-04-01 09:21:49 -04001385 &timeparms,
1386 data->minorversion);
Trond Myklebust33170232007-12-20 16:03:59 -05001387 if (error < 0)
1388 goto error;
1389
David Howells54ceac42006-08-22 20:06:13 -04001390 if (data->rsize)
1391 server->rsize = nfs_block_size(data->rsize, NULL);
1392 if (data->wsize)
1393 server->wsize = nfs_block_size(data->wsize, NULL);
1394
1395 server->acregmin = data->acregmin * HZ;
1396 server->acregmax = data->acregmax * HZ;
1397 server->acdirmin = data->acdirmin * HZ;
1398 server->acdirmax = data->acdirmax * HZ;
1399
Chuck Leverf22d6d72008-03-14 14:10:22 -04001400 server->port = data->nfs_server.port;
1401
Trond Myklebust33170232007-12-20 16:03:59 -05001402 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -04001403
Trond Myklebust33170232007-12-20 16:03:59 -05001404error:
David Howells54ceac42006-08-22 20:06:13 -04001405 /* Done */
1406 dprintk("<-- nfs4_init_server() = %d\n", error);
1407 return error;
1408}
1409
1410/*
1411 * Create a version 4 volume record
1412 * - keyed on server and FSID
1413 */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001414struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -04001415 struct nfs_fh *mntfh)
1416{
David Howells54ceac42006-08-22 20:06:13 -04001417 struct nfs_server *server;
1418 int error;
1419
1420 dprintk("--> nfs4_create_server()\n");
1421
1422 server = nfs_alloc_server();
1423 if (!server)
1424 return ERR_PTR(-ENOMEM);
1425
David Howells54ceac42006-08-22 20:06:13 -04001426 /* set up the general RPC client */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001427 error = nfs4_init_server(server, data);
David Howells54ceac42006-08-22 20:06:13 -04001428 if (error < 0)
1429 goto error;
1430
Trond Myklebust44950b62010-06-17 11:45:12 -04001431 error = nfs4_server_common_setup(server, mntfh);
Trond Myklebustfccba802009-07-21 16:48:07 -04001432 if (error < 0)
1433 goto error;
Andy Adamson557134a2009-04-01 09:21:53 -04001434
David Howells54ceac42006-08-22 20:06:13 -04001435 dprintk("<-- nfs4_create_server() = %p\n", server);
1436 return server;
1437
1438error:
1439 nfs_free_server(server);
1440 dprintk("<-- nfs4_create_server() = error %d\n", error);
1441 return ERR_PTR(error);
1442}
1443
1444/*
1445 * Create an NFS4 referral server record
1446 */
1447struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001448 struct nfs_fh *mntfh)
David Howells54ceac42006-08-22 20:06:13 -04001449{
1450 struct nfs_client *parent_client;
1451 struct nfs_server *server, *parent_server;
David Howells54ceac42006-08-22 20:06:13 -04001452 int error;
1453
1454 dprintk("--> nfs4_create_referral_server()\n");
1455
1456 server = nfs_alloc_server();
1457 if (!server)
1458 return ERR_PTR(-ENOMEM);
1459
1460 parent_server = NFS_SB(data->sb);
1461 parent_client = parent_server->nfs_client;
1462
Chuck Lever542fcc32008-12-23 15:21:36 -05001463 /* Initialise the client representation from the parent server */
1464 nfs_server_copy_userdata(server, parent_server);
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001465 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
Chuck Lever542fcc32008-12-23 15:21:36 -05001466
David Howells54ceac42006-08-22 20:06:13 -04001467 /* Get a client representation.
1468 * Note: NFSv4 always uses TCP, */
Chuck Leverdcecae02007-12-10 14:58:59 -05001469 error = nfs4_set_client(server, data->hostname,
Chuck Lever6677d092007-12-10 14:59:06 -05001470 data->addr,
1471 data->addrlen,
Chuck Leverdcecae02007-12-10 14:58:59 -05001472 parent_client->cl_ipaddr,
1473 data->authflavor,
1474 parent_server->client->cl_xprt->prot,
Benny Halevy94a417f2009-04-01 09:21:49 -04001475 parent_server->client->cl_timeout,
Trond Myklebust97dc1352010-06-16 09:52:26 -04001476 parent_client->cl_mvops->minor_version);
andros@citi.umich.edu297de4f2006-08-29 12:19:41 -04001477 if (error < 0)
1478 goto error;
David Howells54ceac42006-08-22 20:06:13 -04001479
Trond Myklebust33170232007-12-20 16:03:59 -05001480 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
David Howells54ceac42006-08-22 20:06:13 -04001481 if (error < 0)
1482 goto error;
1483
Trond Myklebust44950b62010-06-17 11:45:12 -04001484 error = nfs4_server_common_setup(server, mntfh);
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001485 if (error < 0)
1486 goto error;
1487
David Howells54ceac42006-08-22 20:06:13 -04001488 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1489 return server;
1490
1491error:
1492 nfs_free_server(server);
1493 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1494 return ERR_PTR(error);
1495}
1496
1497#endif /* CONFIG_NFS_V4 */
1498
1499/*
1500 * Clone an NFS2, NFS3 or NFS4 server record
1501 */
1502struct nfs_server *nfs_clone_server(struct nfs_server *source,
1503 struct nfs_fh *fh,
1504 struct nfs_fattr *fattr)
1505{
1506 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001507 struct nfs_fattr *fattr_fsinfo;
David Howells54ceac42006-08-22 20:06:13 -04001508 int error;
1509
1510 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001511 (unsigned long long) fattr->fsid.major,
1512 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001513
1514 server = nfs_alloc_server();
1515 if (!server)
1516 return ERR_PTR(-ENOMEM);
1517
Trond Myklebustfbca7792010-04-16 16:22:46 -04001518 error = -ENOMEM;
1519 fattr_fsinfo = nfs_alloc_fattr();
1520 if (fattr_fsinfo == NULL)
1521 goto out_free_server;
1522
David Howells54ceac42006-08-22 20:06:13 -04001523 /* Copy data from the source */
1524 server->nfs_client = source->nfs_client;
1525 atomic_inc(&server->nfs_client->cl_count);
1526 nfs_server_copy_userdata(server, source);
1527
1528 server->fsid = fattr->fsid;
1529
Trond Myklebust33170232007-12-20 16:03:59 -05001530 error = nfs_init_server_rpcclient(server,
1531 source->client->cl_timeout,
1532 source->client->cl_auth->au_flavor);
David Howells54ceac42006-08-22 20:06:13 -04001533 if (error < 0)
1534 goto out_free_server;
1535 if (!IS_ERR(source->client_acl))
1536 nfs_init_server_aclclient(server);
1537
1538 /* probe the filesystem info for this server filesystem */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001539 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001540 if (error < 0)
1541 goto out_free_server;
1542
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001543 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1544 server->namelen = NFS4_MAXNAMLEN;
1545
David Howells54ceac42006-08-22 20:06:13 -04001546 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001547 (unsigned long long) server->fsid.major,
1548 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001549
1550 error = nfs_start_lockd(server);
1551 if (error < 0)
1552 goto out_free_server;
1553
1554 spin_lock(&nfs_client_lock);
1555 list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
1556 list_add_tail(&server->master_link, &nfs_volume_list);
1557 spin_unlock(&nfs_client_lock);
1558
1559 server->mount_time = jiffies;
1560
Trond Myklebustfbca7792010-04-16 16:22:46 -04001561 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001562 dprintk("<-- nfs_clone_server() = %p\n", server);
1563 return server;
1564
1565out_free_server:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001566 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001567 nfs_free_server(server);
1568 dprintk("<-- nfs_clone_server() = error %d\n", error);
1569 return ERR_PTR(error);
1570}
David Howells6aaca562006-08-22 20:06:13 -04001571
1572#ifdef CONFIG_PROC_FS
1573static struct proc_dir_entry *proc_fs_nfs;
1574
1575static int nfs_server_list_open(struct inode *inode, struct file *file);
1576static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1577static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1578static void nfs_server_list_stop(struct seq_file *p, void *v);
1579static int nfs_server_list_show(struct seq_file *m, void *v);
1580
James Morris88e9d342009-09-22 16:43:43 -07001581static const struct seq_operations nfs_server_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001582 .start = nfs_server_list_start,
1583 .next = nfs_server_list_next,
1584 .stop = nfs_server_list_stop,
1585 .show = nfs_server_list_show,
1586};
1587
Arjan van de Ven00977a52007-02-12 00:55:34 -08001588static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001589 .open = nfs_server_list_open,
1590 .read = seq_read,
1591 .llseek = seq_lseek,
1592 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001593 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001594};
1595
1596static int nfs_volume_list_open(struct inode *inode, struct file *file);
1597static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1598static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1599static void nfs_volume_list_stop(struct seq_file *p, void *v);
1600static int nfs_volume_list_show(struct seq_file *m, void *v);
1601
James Morris88e9d342009-09-22 16:43:43 -07001602static const struct seq_operations nfs_volume_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001603 .start = nfs_volume_list_start,
1604 .next = nfs_volume_list_next,
1605 .stop = nfs_volume_list_stop,
1606 .show = nfs_volume_list_show,
1607};
1608
Arjan van de Ven00977a52007-02-12 00:55:34 -08001609static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001610 .open = nfs_volume_list_open,
1611 .read = seq_read,
1612 .llseek = seq_lseek,
1613 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001614 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001615};
1616
1617/*
1618 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1619 * we're dealing
1620 */
1621static int nfs_server_list_open(struct inode *inode, struct file *file)
1622{
1623 struct seq_file *m;
1624 int ret;
1625
1626 ret = seq_open(file, &nfs_server_list_ops);
1627 if (ret < 0)
1628 return ret;
1629
1630 m = file->private_data;
1631 m->private = PDE(inode)->data;
1632
1633 return 0;
1634}
1635
1636/*
1637 * set up the iterator to start reading from the server list and return the first item
1638 */
1639static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1640{
David Howells6aaca562006-08-22 20:06:13 -04001641 /* lock the list against modification */
1642 spin_lock(&nfs_client_lock);
Pavel Emelianov259902e2007-07-15 23:39:56 -07001643 return seq_list_start_head(&nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001644}
1645
1646/*
1647 * move to next server
1648 */
1649static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1650{
Pavel Emelianov259902e2007-07-15 23:39:56 -07001651 return seq_list_next(v, &nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001652}
1653
1654/*
1655 * clean up after reading from the transports list
1656 */
1657static void nfs_server_list_stop(struct seq_file *p, void *v)
1658{
1659 spin_unlock(&nfs_client_lock);
1660}
1661
1662/*
1663 * display a header line followed by a load of call lines
1664 */
1665static int nfs_server_list_show(struct seq_file *m, void *v)
1666{
1667 struct nfs_client *clp;
1668
1669 /* display header on line 1 */
Pavel Emelianov259902e2007-07-15 23:39:56 -07001670 if (v == &nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001671 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1672 return 0;
1673 }
1674
1675 /* display one transport per line on subsequent lines */
1676 clp = list_entry(v, struct nfs_client, cl_share_link);
1677
Chuck Lever5d8515c2007-12-10 14:57:16 -05001678 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001679 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001680 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1681 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001682 atomic_read(&clp->cl_count),
1683 clp->cl_hostname);
1684
1685 return 0;
1686}
1687
1688/*
1689 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1690 */
1691static int nfs_volume_list_open(struct inode *inode, struct file *file)
1692{
1693 struct seq_file *m;
1694 int ret;
1695
1696 ret = seq_open(file, &nfs_volume_list_ops);
1697 if (ret < 0)
1698 return ret;
1699
1700 m = file->private_data;
1701 m->private = PDE(inode)->data;
1702
1703 return 0;
1704}
1705
1706/*
1707 * set up the iterator to start reading from the volume list and return the first item
1708 */
1709static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1710{
David Howells6aaca562006-08-22 20:06:13 -04001711 /* lock the list against modification */
1712 spin_lock(&nfs_client_lock);
Pavel Emelianov259902e2007-07-15 23:39:56 -07001713 return seq_list_start_head(&nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001714}
1715
1716/*
1717 * move to next volume
1718 */
1719static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1720{
Pavel Emelianov259902e2007-07-15 23:39:56 -07001721 return seq_list_next(v, &nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001722}
1723
1724/*
1725 * clean up after reading from the transports list
1726 */
1727static void nfs_volume_list_stop(struct seq_file *p, void *v)
1728{
1729 spin_unlock(&nfs_client_lock);
1730}
1731
1732/*
1733 * display a header line followed by a load of call lines
1734 */
1735static int nfs_volume_list_show(struct seq_file *m, void *v)
1736{
1737 struct nfs_server *server;
1738 struct nfs_client *clp;
1739 char dev[8], fsid[17];
1740
1741 /* display header on line 1 */
Pavel Emelianov259902e2007-07-15 23:39:56 -07001742 if (v == &nfs_volume_list) {
David Howells5d1acff2009-04-03 16:42:47 +01001743 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
David Howells6aaca562006-08-22 20:06:13 -04001744 return 0;
1745 }
1746 /* display one transport per line on subsequent lines */
1747 server = list_entry(v, struct nfs_server, master_link);
1748 clp = server->nfs_client;
1749
1750 snprintf(dev, 8, "%u:%u",
1751 MAJOR(server->s_dev), MINOR(server->s_dev));
1752
1753 snprintf(fsid, 17, "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04001754 (unsigned long long) server->fsid.major,
1755 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04001756
David Howells5d1acff2009-04-03 16:42:47 +01001757 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001758 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001759 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1760 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001761 dev,
David Howells5d1acff2009-04-03 16:42:47 +01001762 fsid,
1763 nfs_server_fscache_state(server));
David Howells6aaca562006-08-22 20:06:13 -04001764
1765 return 0;
1766}
1767
1768/*
1769 * initialise the /proc/fs/nfsfs/ directory
1770 */
1771int __init nfs_fs_proc_init(void)
1772{
1773 struct proc_dir_entry *p;
1774
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001775 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001776 if (!proc_fs_nfs)
1777 goto error_0;
1778
David Howells6aaca562006-08-22 20:06:13 -04001779 /* a file of servers with which we're dealing */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001780 p = proc_create("servers", S_IFREG|S_IRUGO,
1781 proc_fs_nfs, &nfs_server_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001782 if (!p)
1783 goto error_1;
1784
David Howells6aaca562006-08-22 20:06:13 -04001785 /* a file of volumes that we have mounted */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001786 p = proc_create("volumes", S_IFREG|S_IRUGO,
1787 proc_fs_nfs, &nfs_volume_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001788 if (!p)
1789 goto error_2;
David Howells6aaca562006-08-22 20:06:13 -04001790 return 0;
1791
1792error_2:
1793 remove_proc_entry("servers", proc_fs_nfs);
1794error_1:
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001795 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001796error_0:
1797 return -ENOMEM;
1798}
1799
1800/*
1801 * clean up the /proc/fs/nfsfs/ directory
1802 */
1803void nfs_fs_proc_exit(void)
1804{
1805 remove_proc_entry("volumes", proc_fs_nfs);
1806 remove_proc_entry("servers", proc_fs_nfs);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001807 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001808}
1809
1810#endif /* CONFIG_PROC_FS */