blob: 60f7e4ec842cf1d4fd48f21862d1d5ece26efc88 [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>
Al Viro40401532012-02-13 03:58:52 +000039#include <linux/idr.h>
Trond Myklebust3b0d3f92008-01-03 13:28:58 -050040#include <net/ipv6.h>
David Howells24c8dbb2006-08-22 20:06:10 -040041#include <linux/nfs_xdr.h>
Andy Adamson0b5b7ae2009-04-01 09:23:15 -040042#include <linux/sunrpc/bc_xprt.h>
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +000043#include <linux/nsproxy.h>
44#include <linux/pid_namespace.h>
David Howells24c8dbb2006-08-22 20:06:10 -040045
David Howells24c8dbb2006-08-22 20:06:10 -040046
47#include "nfs4_fs.h"
48#include "callback.h"
49#include "delegation.h"
50#include "iostat.h"
51#include "internal.h"
David Howells14727282009-04-03 16:42:42 +010052#include "fscache.h"
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040053#include "pnfs.h"
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +000054#include "netns.h"
David Howells24c8dbb2006-08-22 20:06:10 -040055
56#define NFSDBG_FACILITY NFSDBG_CLIENT
57
David Howells24c8dbb2006-08-22 20:06:10 -040058static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
Andy Adamsonf4eecd52011-01-06 02:04:30 +000059#ifdef CONFIG_NFS_V4
Andy Adamsonf4eecd52011-01-06 02:04:30 +000060
61/*
62 * Get a unique NFSv4.0 callback identifier which will be used
63 * by the V4.0 callback service to lookup the nfs_client struct
64 */
65static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
66{
67 int ret = 0;
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +000068 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
Andy Adamsonf4eecd52011-01-06 02:04:30 +000069
70 if (clp->rpc_ops->version != 4 || minorversion != 0)
71 return ret;
72retry:
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +000073 if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL))
Andy Adamsonf4eecd52011-01-06 02:04:30 +000074 return -ENOMEM;
Stanislav Kinsburskydc030852012-01-23 17:26:31 +000075 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +000076 ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +000077 spin_unlock(&nn->nfs_client_lock);
Andy Adamsonf4eecd52011-01-06 02:04:30 +000078 if (ret == -EAGAIN)
79 goto retry;
80 return ret;
81}
82#endif /* CONFIG_NFS_V4 */
David Howells24c8dbb2006-08-22 20:06:10 -040083
84/*
Trond Myklebustb064eca22011-02-22 15:44:32 -080085 * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
86 */
Rusty Russell90ab5ee2012-01-13 09:32:20 +103087static bool nfs4_disable_idmapping = true;
Trond Myklebustb064eca22011-02-22 15:44:32 -080088
89/*
David Howells5006a762006-08-22 20:06:12 -040090 * RPC cruft for NFS
91 */
Trond Myklebusta613fa12012-01-20 13:53:56 -050092static const struct rpc_version *nfs_version[5] = {
David Howells5006a762006-08-22 20:06:12 -040093 [2] = &nfs_version2,
94#ifdef CONFIG_NFS_V3
95 [3] = &nfs_version3,
96#endif
97#ifdef CONFIG_NFS_V4
98 [4] = &nfs_version4,
99#endif
100};
101
Trond Myklebusta613fa12012-01-20 13:53:56 -0500102const struct rpc_program nfs_program = {
David Howells5006a762006-08-22 20:06:12 -0400103 .name = "nfs",
104 .number = NFS_PROGRAM,
105 .nrvers = ARRAY_SIZE(nfs_version),
106 .version = nfs_version,
107 .stats = &nfs_rpcstat,
Jim Reesfe0a9b72011-07-30 20:52:42 -0400108 .pipe_dir_name = NFS_PIPE_DIRNAME,
David Howells5006a762006-08-22 20:06:12 -0400109};
110
111struct rpc_stat nfs_rpcstat = {
112 .program = &nfs_program
113};
114
115
116#ifdef CONFIG_NFS_V3_ACL
117static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
Trond Myklebusta613fa12012-01-20 13:53:56 -0500118static const struct rpc_version *nfsacl_version[] = {
David Howells5006a762006-08-22 20:06:12 -0400119 [3] = &nfsacl_version3,
120};
121
Trond Myklebusta613fa12012-01-20 13:53:56 -0500122const struct rpc_program nfsacl_program = {
David Howells5006a762006-08-22 20:06:12 -0400123 .name = "nfsacl",
124 .number = NFS_ACL_PROGRAM,
125 .nrvers = ARRAY_SIZE(nfsacl_version),
126 .version = nfsacl_version,
127 .stats = &nfsacl_rpcstat,
128};
129#endif /* CONFIG_NFS_V3_ACL */
130
Trond Myklebust3a498022007-12-14 14:56:04 -0500131struct nfs_client_initdata {
132 const char *hostname;
Chuck Leverd7422c42007-12-10 14:58:51 -0500133 const struct sockaddr *addr;
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500134 size_t addrlen;
Trond Myklebust40c553192007-12-14 14:56:07 -0500135 const struct nfs_rpc_ops *rpc_ops;
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500136 int proto;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400137 u32 minorversion;
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400138 struct net *net;
Trond Myklebust3a498022007-12-14 14:56:04 -0500139};
140
David Howells5006a762006-08-22 20:06:12 -0400141/*
David Howells24c8dbb2006-08-22 20:06:10 -0400142 * Allocate a shared client record
143 *
144 * Since these are allocated/deallocated very rarely, we don't
145 * bother putting them in a slab cache...
146 */
Trond Myklebust3a498022007-12-14 14:56:04 -0500147static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400148{
149 struct nfs_client *clp;
Trond Myklebust7c67db32008-04-07 20:50:11 -0400150 struct rpc_cred *cred;
Chuck Levera21bdd92009-06-17 18:02:10 -0700151 int err = -ENOMEM;
David Howells24c8dbb2006-08-22 20:06:10 -0400152
153 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
154 goto error_0;
155
Trond Myklebust40c553192007-12-14 14:56:07 -0500156 clp->rpc_ops = cl_init->rpc_ops;
157
David Howells24c8dbb2006-08-22 20:06:10 -0400158 atomic_set(&clp->cl_count, 1);
159 clp->cl_cons_state = NFS_CS_INITING;
160
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500161 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
162 clp->cl_addrlen = cl_init->addrlen;
David Howells24c8dbb2006-08-22 20:06:10 -0400163
Trond Myklebust3a498022007-12-14 14:56:04 -0500164 if (cl_init->hostname) {
Chuck Levera21bdd92009-06-17 18:02:10 -0700165 err = -ENOMEM;
Trond Myklebust3a498022007-12-14 14:56:04 -0500166 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
David Howells24c8dbb2006-08-22 20:06:10 -0400167 if (!clp->cl_hostname)
Benny Halevy71468512009-04-01 09:22:56 -0400168 goto error_cleanup;
David Howells24c8dbb2006-08-22 20:06:10 -0400169 }
170
171 INIT_LIST_HEAD(&clp->cl_superblocks);
172 clp->cl_rpcclient = ERR_PTR(-EINVAL);
173
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500174 clp->cl_proto = cl_init->proto;
Trond Myklebustabd96692012-02-19 08:46:49 +0100175 clp->net = get_net(cl_init->net);
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500176
David Howells24c8dbb2006-08-22 20:06:10 -0400177#ifdef CONFIG_NFS_V4
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000178 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
179 if (err)
180 goto error_cleanup;
181
David Howells24c8dbb2006-08-22 20:06:10 -0400182 spin_lock_init(&clp->cl_lock);
David Howells65f27f32006-11-22 14:55:48 +0000183 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
David Howells24c8dbb2006-08-22 20:06:10 -0400184 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
185 clp->cl_boot_time = CURRENT_TIME;
186 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400187 clp->cl_minorversion = cl_init->minorversion;
Trond Myklebust97dc1352010-06-16 09:52:26 -0400188 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
David Howells24c8dbb2006-08-22 20:06:10 -0400189#endif
Trond Myklebust68c97152012-01-03 13:22:46 -0500190 cred = rpc_lookup_machine_cred("*");
Trond Myklebust7c67db32008-04-07 20:50:11 -0400191 if (!IS_ERR(cred))
192 clp->cl_machine_cred = cred;
David Howells14727282009-04-03 16:42:42 +0100193 nfs_fscache_get_client_cookie(clp);
194
David Howells24c8dbb2006-08-22 20:06:10 -0400195 return clp;
196
Benny Halevy71468512009-04-01 09:22:56 -0400197error_cleanup:
David Howells24c8dbb2006-08-22 20:06:10 -0400198 kfree(clp);
199error_0:
Chuck Levera21bdd92009-06-17 18:02:10 -0700200 return ERR_PTR(err);
David Howells24c8dbb2006-08-22 20:06:10 -0400201}
202
Trond Myklebust5dd31772006-08-24 01:03:05 -0400203#ifdef CONFIG_NFS_V4
Andy Adamson557134a2009-04-01 09:21:53 -0400204#ifdef CONFIG_NFS_V4_1
Andy Adamsonea005282011-01-06 02:04:29 +0000205static void nfs4_shutdown_session(struct nfs_client *clp)
206{
Trond Myklebust7df529a2012-02-26 17:34:22 -0500207 if (nfs4_has_session(clp)) {
208 nfs4_deviceid_purge_client(clp);
Andy Adamson557134a2009-04-01 09:21:53 -0400209 nfs4_destroy_session(clp->cl_session);
Trond Myklebust7df529a2012-02-26 17:34:22 -0500210 }
211
Andy Adamson557134a2009-04-01 09:21:53 -0400212}
Andy Adamsonea005282011-01-06 02:04:29 +0000213#else /* CONFIG_NFS_V4_1 */
214static void nfs4_shutdown_session(struct nfs_client *clp)
215{
216}
217#endif /* CONFIG_NFS_V4_1 */
Andy Adamson557134a2009-04-01 09:21:53 -0400218
219/*
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800220 * Destroy the NFS4 callback service
221 */
222static void nfs4_destroy_callback(struct nfs_client *clp)
223{
224 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
Trond Myklebust97dc1352010-06-16 09:52:26 -0400225 nfs_callback_down(clp->cl_mvops->minor_version);
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800226}
227
228static void nfs4_shutdown_client(struct nfs_client *clp)
229{
230 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
231 nfs4_kill_renewd(clp);
Andy Adamsonea005282011-01-06 02:04:29 +0000232 nfs4_shutdown_session(clp);
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800233 nfs4_destroy_callback(clp);
234 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
235 nfs_idmap_delete(clp);
236
237 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
238}
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000239
240/* idr_remove_all is not needed as all id's are removed by nfs_put_client */
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000241void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000242{
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000243 struct nfs_net *nn = net_generic(net, nfs_net_id);
244
245 idr_destroy(&nn->cb_ident_idr);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000246}
247
248/* nfs_client_lock held */
249static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
250{
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000251 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
252
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000253 if (clp->cl_cb_ident)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000254 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000255}
256
Fred Isamanf7e89172011-01-06 11:36:32 +0000257static void pnfs_init_server(struct nfs_server *server)
258{
259 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
260}
261
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500262static void nfs4_destroy_server(struct nfs_server *server)
263{
264 nfs4_purge_state_owners(server);
265}
266
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800267#else
268static void nfs4_shutdown_client(struct nfs_client *clp)
269{
270}
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000271
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000272void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000273{
274}
275
276static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
277{
278}
Fred Isamanf7e89172011-01-06 11:36:32 +0000279
280static void pnfs_init_server(struct nfs_server *server)
281{
282}
283
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800284#endif /* CONFIG_NFS_V4 */
285
286/*
David Howells24c8dbb2006-08-22 20:06:10 -0400287 * Destroy a shared client record
288 */
289static void nfs_free_client(struct nfs_client *clp)
290{
Trond Myklebust40c553192007-12-14 14:56:07 -0500291 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400292
Trond Myklebust5dd31772006-08-24 01:03:05 -0400293 nfs4_shutdown_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400294
David Howells14727282009-04-03 16:42:42 +0100295 nfs_fscache_release_client_cookie(clp);
296
David Howells24c8dbb2006-08-22 20:06:10 -0400297 /* -EIO all pending I/O */
298 if (!IS_ERR(clp->cl_rpcclient))
299 rpc_shutdown_client(clp->cl_rpcclient);
300
Trond Myklebust7c67db32008-04-07 20:50:11 -0400301 if (clp->cl_machine_cred != NULL)
302 put_rpccred(clp->cl_machine_cred);
303
Trond Myklebustabd96692012-02-19 08:46:49 +0100304 put_net(clp->net);
David Howells24c8dbb2006-08-22 20:06:10 -0400305 kfree(clp->cl_hostname);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -0400306 kfree(clp->server_scope);
Weston Andros Adamson7d2ed9a2012-02-17 15:20:26 -0500307 kfree(clp->impl_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400308 kfree(clp);
309
310 dprintk("<-- nfs_free_client()\n");
311}
312
313/*
314 * Release a reference to a shared client record
315 */
316void nfs_put_client(struct nfs_client *clp)
317{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000318 struct nfs_net *nn;
319
David Howells27ba8512006-07-30 14:40:56 -0400320 if (!clp)
321 return;
322
David Howells24c8dbb2006-08-22 20:06:10 -0400323 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000324 nn = net_generic(clp->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400325
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000326 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
David Howells24c8dbb2006-08-22 20:06:10 -0400327 list_del(&clp->cl_share_link);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000328 nfs_cb_idr_remove_locked(clp);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000329 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400330
331 BUG_ON(!list_empty(&clp->cl_superblocks));
332
333 nfs_free_client(clp);
334 }
335}
Andy Adamson16b374c2010-10-20 00:18:04 -0400336EXPORT_SYMBOL_GPL(nfs_put_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400337
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500338#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400339/*
340 * Test if two ip6 socket addresses refer to the same socket by
341 * comparing relevant fields. The padding bytes specifically, are not
342 * compared. sin6_flowinfo is not compared because it only affects QoS
343 * and sin6_scope_id is only compared if the address is "link local"
344 * because "link local" addresses need only be unique to a specific
345 * link. Conversely, ordinary unicast addresses might have different
346 * sin6_scope_id.
347 *
348 * The caller should ensure both socket addresses are AF_INET6.
349 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400350static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
351 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400352{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400353 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
354 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400355
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800356 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400357 return 0;
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800358 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
359 return sin1->sin6_scope_id == sin2->sin6_scope_id;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500360
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800361 return 1;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500362}
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400363#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
364static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
365 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400366{
367 return 0;
368}
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500369#endif
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500370
David Howells24c8dbb2006-08-22 20:06:10 -0400371/*
Ian Dalld7371c42009-03-10 20:33:22 -0400372 * Test if two ip4 socket addresses refer to the same socket, by
373 * comparing relevant fields. The padding bytes specifically, are
374 * not compared.
375 *
376 * The caller should ensure both socket addresses are AF_INET.
377 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400378static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
379 const struct sockaddr *sa2)
380{
381 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
382 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
383
384 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
385}
386
387static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
388 const struct sockaddr *sa2)
389{
390 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
391 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
392
393 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
394 (sin1->sin6_port == sin2->sin6_port);
395}
396
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400397static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
398 const struct sockaddr *sa2)
Ian Dalld7371c42009-03-10 20:33:22 -0400399{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400400 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
401 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400402
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400403 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
404 (sin1->sin_port == sin2->sin_port);
Ian Dalld7371c42009-03-10 20:33:22 -0400405}
406
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400407#if defined(CONFIG_NFS_V4_1)
Ian Dalld7371c42009-03-10 20:33:22 -0400408/*
Ian Dalld7371c42009-03-10 20:33:22 -0400409 * Test if two socket addresses represent the same actual socket,
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400410 * by comparing (only) relevant fields, excluding the port number.
411 */
412static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
413 const struct sockaddr *sa2)
414{
415 if (sa1->sa_family != sa2->sa_family)
416 return 0;
417
418 switch (sa1->sa_family) {
419 case AF_INET:
420 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
421 case AF_INET6:
422 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
423 }
424 return 0;
425}
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400426#endif /* CONFIG_NFS_V4_1 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400427
428/*
429 * Test if two socket addresses represent the same actual socket,
430 * by comparing (only) relevant fields, including the port number.
Ian Dalld7371c42009-03-10 20:33:22 -0400431 */
432static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
433 const struct sockaddr *sa2)
434{
435 if (sa1->sa_family != sa2->sa_family)
436 return 0;
437
438 switch (sa1->sa_family) {
439 case AF_INET:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400440 return nfs_sockaddr_cmp_ip4(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400441 case AF_INET6:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400442 return nfs_sockaddr_cmp_ip6(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400443 }
444 return 0;
445}
446
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400447#if defined(CONFIG_NFS_V4_1)
Andy Adamsonc36fca52011-01-06 02:04:32 +0000448/* Common match routine for v4.0 and v4.1 callback services */
Trond Myklebust17280172012-03-11 13:11:00 -0400449static bool nfs4_cb_match_client(const struct sockaddr *addr,
450 struct nfs_client *clp, u32 minorversion)
Trond Myklebustc81468a2007-12-14 14:56:05 -0500451{
Andy Adamsonc36fca52011-01-06 02:04:32 +0000452 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500453
Andy Adamsonc36fca52011-01-06 02:04:32 +0000454 /* Don't match clients that failed to initialise */
455 if (!(clp->cl_cons_state == NFS_CS_READY ||
456 clp->cl_cons_state == NFS_CS_SESSION_INITING))
457 return false;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500458
Andy Adamsonc36fca52011-01-06 02:04:32 +0000459 /* Match the version and minorversion */
460 if (clp->rpc_ops->version != 4 ||
461 clp->cl_minorversion != minorversion)
462 return false;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500463
Andy Adamsonc36fca52011-01-06 02:04:32 +0000464 /* Match only the IP address, not the port number */
465 if (!nfs_sockaddr_match_ipaddr(addr, clap))
466 return false;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500467
Andy Adamsonc36fca52011-01-06 02:04:32 +0000468 return true;
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500469}
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400470#endif /* CONFIG_NFS_V4_1 */
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500471
472/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500473 * Find an nfs_client on the list that matches the initialisation data
474 * that is supplied.
475 */
476static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400477{
478 struct nfs_client *clp;
Ian Dalld7371c42009-03-10 20:33:22 -0400479 const struct sockaddr *sap = data->addr;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000480 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400481
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000482 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Ian Dalld7371c42009-03-10 20:33:22 -0400483 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebust13bbc062006-10-19 23:28:40 -0700484 /* Don't match clients that failed to initialise properly */
485 if (clp->cl_cons_state < 0)
486 continue;
487
David Howells24c8dbb2006-08-22 20:06:10 -0400488 /* Different NFS versions cannot share the same nfs_client */
Trond Myklebust40c553192007-12-14 14:56:07 -0500489 if (clp->rpc_ops != data->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400490 continue;
491
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500492 if (clp->cl_proto != data->proto)
493 continue;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400494 /* Match nfsv4 minorversion */
495 if (clp->cl_minorversion != data->minorversion)
496 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500497 /* Match the full socket address */
Ian Dalld7371c42009-03-10 20:33:22 -0400498 if (!nfs_sockaddr_cmp(sap, clap))
David Howells24c8dbb2006-08-22 20:06:10 -0400499 continue;
500
Trond Myklebustc81468a2007-12-14 14:56:05 -0500501 atomic_inc(&clp->cl_count);
502 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400503 }
David Howells24c8dbb2006-08-22 20:06:10 -0400504 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400505}
506
507/*
508 * Look up a client by IP address and protocol version
509 * - creates a new record if one doesn't yet exist
510 */
Andy Adamson45a52a02011-03-01 01:34:08 +0000511static struct nfs_client *
512nfs_get_client(const struct nfs_client_initdata *cl_init,
513 const struct rpc_timeout *timeparms,
514 const char *ip_addr,
515 rpc_authflavor_t authflavour,
516 int noresvport)
David Howells24c8dbb2006-08-22 20:06:10 -0400517{
518 struct nfs_client *clp, *new = NULL;
519 int error;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000520 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400521
Chuck Leverd7422c42007-12-10 14:58:51 -0500522 dprintk("--> nfs_get_client(%s,v%u)\n",
523 cl_init->hostname ?: "", cl_init->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400524
525 /* see if the client already exists */
526 do {
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000527 spin_lock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400528
Trond Myklebustc81468a2007-12-14 14:56:05 -0500529 clp = nfs_match_client(cl_init);
David Howells24c8dbb2006-08-22 20:06:10 -0400530 if (clp)
531 goto found_client;
532 if (new)
533 goto install_client;
534
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000535 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400536
Trond Myklebust3a498022007-12-14 14:56:04 -0500537 new = nfs_alloc_client(cl_init);
Chuck Levera21bdd92009-06-17 18:02:10 -0700538 } while (!IS_ERR(new));
David Howells24c8dbb2006-08-22 20:06:10 -0400539
Chuck Levera21bdd92009-06-17 18:02:10 -0700540 dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
541 return new;
David Howells24c8dbb2006-08-22 20:06:10 -0400542
543 /* install a new client and return with it unready */
544install_client:
545 clp = new;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000546 list_add(&clp->cl_share_link, &nn->nfs_client_list);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000547 spin_unlock(&nn->nfs_client_lock);
Andy Adamson45a52a02011-03-01 01:34:08 +0000548
549 error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr,
550 authflavour, noresvport);
551 if (error < 0) {
552 nfs_put_client(clp);
553 return ERR_PTR(error);
554 }
David Howells24c8dbb2006-08-22 20:06:10 -0400555 dprintk("--> nfs_get_client() = %p [new]\n", clp);
556 return clp;
557
558 /* found an existing client
559 * - make sure it's ready before returning
560 */
561found_client:
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000562 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400563
564 if (new)
565 nfs_free_client(new);
566
Matthew Wilcox150030b2007-12-06 16:24:39 -0500567 error = wait_event_killable(nfs_client_active_wq,
Andy Adamson76db6d92009-04-01 09:22:38 -0400568 clp->cl_cons_state < NFS_CS_INITING);
Trond Myklebust0bae89e2006-10-08 14:33:24 -0400569 if (error < 0) {
570 nfs_put_client(clp);
571 return ERR_PTR(-ERESTARTSYS);
David Howells24c8dbb2006-08-22 20:06:10 -0400572 }
573
574 if (clp->cl_cons_state < NFS_CS_READY) {
575 error = clp->cl_cons_state;
576 nfs_put_client(clp);
577 return ERR_PTR(error);
578 }
579
David Howells54ceac42006-08-22 20:06:13 -0400580 BUG_ON(clp->cl_cons_state != NFS_CS_READY);
581
David Howells24c8dbb2006-08-22 20:06:10 -0400582 dprintk("--> nfs_get_client() = %p [share]\n", clp);
583 return clp;
584}
585
586/*
587 * Mark a server as ready or failed
588 */
Andy Adamson76db6d92009-04-01 09:22:38 -0400589void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400590{
591 clp->cl_cons_state = state;
592 wake_up_all(&nfs_client_active_wq);
593}
David Howells5006a762006-08-22 20:06:12 -0400594
595/*
Benny Halevy008f55d2009-04-01 09:22:50 -0400596 * With sessions, the client is not marked ready until after a
597 * successful EXCHANGE_ID and CREATE_SESSION.
598 *
599 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
600 * other versions of NFS can be tried.
601 */
602int nfs4_check_client_ready(struct nfs_client *clp)
603{
604 if (!nfs4_has_session(clp))
605 return 0;
606 if (clp->cl_cons_state < NFS_CS_READY)
607 return -EPROTONOSUPPORT;
608 return 0;
609}
610
611/*
David Howells5006a762006-08-22 20:06:12 -0400612 * Initialise the timeout values for a connection
613 */
614static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
615 unsigned int timeo, unsigned int retrans)
616{
617 to->to_initval = timeo * HZ / 10;
618 to->to_retries = retrans;
David Howells5006a762006-08-22 20:06:12 -0400619
620 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400621 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400622 case XPRT_TRANSPORT_RDMA:
Trond Myklebust259875e2008-07-02 14:43:47 -0400623 if (to->to_retries == 0)
624 to->to_retries = NFS_DEF_TCP_RETRANS;
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500625 if (to->to_initval == 0)
Trond Myklebust259875e2008-07-02 14:43:47 -0400626 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400627 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
628 to->to_initval = NFS_MAX_TCP_TIMEOUT;
629 to->to_increment = to->to_initval;
630 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500631 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
632 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
633 if (to->to_maxval < to->to_initval)
634 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400635 to->to_exponential = 0;
636 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400637 case XPRT_TRANSPORT_UDP:
Trond Myklebust259875e2008-07-02 14:43:47 -0400638 if (to->to_retries == 0)
639 to->to_retries = NFS_DEF_UDP_RETRANS;
David Howells5006a762006-08-22 20:06:12 -0400640 if (!to->to_initval)
Trond Myklebust259875e2008-07-02 14:43:47 -0400641 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400642 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
643 to->to_initval = NFS_MAX_UDP_TIMEOUT;
644 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
645 to->to_exponential = 1;
646 break;
Trond Myklebust259875e2008-07-02 14:43:47 -0400647 default:
648 BUG();
David Howells5006a762006-08-22 20:06:12 -0400649 }
650}
651
652/*
653 * Create an RPC client handle
654 */
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500655static int nfs_create_rpc_client(struct nfs_client *clp,
Trond Myklebust33170232007-12-20 16:03:59 -0500656 const struct rpc_timeout *timeparms,
657 rpc_authflavor_t flavor,
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500658 int discrtry, int noresvport)
David Howells5006a762006-08-22 20:06:12 -0400659{
David Howells5006a762006-08-22 20:06:12 -0400660 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400661 struct rpc_create_args args = {
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400662 .net = clp->net,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500663 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400664 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500665 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500666 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400667 .servername = clp->cl_hostname,
668 .program = &nfs_program,
669 .version = clp->rpc_ops->version,
670 .authflavor = flavor,
671 };
David Howells5006a762006-08-22 20:06:12 -0400672
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500673 if (discrtry)
674 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
675 if (noresvport)
676 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
677
David Howells5006a762006-08-22 20:06:12 -0400678 if (!IS_ERR(clp->cl_rpcclient))
679 return 0;
680
Chuck Lever41877d22006-08-22 20:06:20 -0400681 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400682 if (IS_ERR(clnt)) {
683 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700684 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400685 return PTR_ERR(clnt);
686 }
687
David Howells5006a762006-08-22 20:06:12 -0400688 clp->cl_rpcclient = clnt;
689 return 0;
690}
David Howells54ceac42006-08-22 20:06:13 -0400691
692/*
693 * Version 2 or 3 client destruction
694 */
695static void nfs_destroy_server(struct nfs_server *server)
696{
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400697 if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
698 !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500699 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400700}
701
702/*
703 * Version 2 or 3 lockd setup
704 */
705static int nfs_start_lockd(struct nfs_server *server)
706{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500707 struct nlm_host *host;
708 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500709 struct nlmclnt_initdata nlm_init = {
710 .hostname = clp->cl_hostname,
711 .address = (struct sockaddr *)&clp->cl_addr,
712 .addrlen = clp->cl_addrlen,
Chuck Lever883bb162008-01-15 16:04:20 -0500713 .nfs_version = clp->rpc_ops->version,
Chuck Lever0cb26592008-12-23 15:21:38 -0500714 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
715 1 : 0,
Stanislav Kinsbursky66697bf2012-01-31 15:08:13 +0400716 .net = clp->net,
Chuck Lever883bb162008-01-15 16:04:20 -0500717 };
David Howells54ceac42006-08-22 20:06:13 -0400718
Chuck Lever883bb162008-01-15 16:04:20 -0500719 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500720 return 0;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400721 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
722 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500723 return 0;
724
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400725 switch (clp->cl_proto) {
726 default:
727 nlm_init.protocol = IPPROTO_TCP;
728 break;
729 case XPRT_TRANSPORT_UDP:
730 nlm_init.protocol = IPPROTO_UDP;
731 }
732
Chuck Lever883bb162008-01-15 16:04:20 -0500733 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500734 if (IS_ERR(host))
735 return PTR_ERR(host);
736
737 server->nlm_host = host;
738 server->destroy = nfs_destroy_server;
739 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400740}
741
742/*
743 * Initialise an NFSv3 ACL client connection
744 */
745#ifdef CONFIG_NFS_V3_ACL
746static void nfs_init_server_aclclient(struct nfs_server *server)
747{
Trond Myklebust40c553192007-12-14 14:56:07 -0500748 if (server->nfs_client->rpc_ops->version != 3)
David Howells54ceac42006-08-22 20:06:13 -0400749 goto out_noacl;
750 if (server->flags & NFS_MOUNT_NOACL)
751 goto out_noacl;
752
753 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
754 if (IS_ERR(server->client_acl))
755 goto out_noacl;
756
757 /* No errors! Assume that Sun nfsacls are supported */
758 server->caps |= NFS_CAP_ACLS;
759 return;
760
761out_noacl:
762 server->caps &= ~NFS_CAP_ACLS;
763}
764#else
765static inline void nfs_init_server_aclclient(struct nfs_server *server)
766{
767 server->flags &= ~NFS_MOUNT_NOACL;
768 server->caps &= ~NFS_CAP_ACLS;
769}
770#endif
771
772/*
773 * Create a general RPC client
774 */
Trond Myklebust33170232007-12-20 16:03:59 -0500775static int nfs_init_server_rpcclient(struct nfs_server *server,
776 const struct rpc_timeout *timeo,
777 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400778{
779 struct nfs_client *clp = server->nfs_client;
780
781 server->client = rpc_clone_client(clp->cl_rpcclient);
782 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700783 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400784 return PTR_ERR(server->client);
785 }
786
Trond Myklebust33170232007-12-20 16:03:59 -0500787 memcpy(&server->client->cl_timeout_default,
788 timeo,
789 sizeof(server->client->cl_timeout_default));
790 server->client->cl_timeout = &server->client->cl_timeout_default;
791
David Howells54ceac42006-08-22 20:06:13 -0400792 if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) {
793 struct rpc_auth *auth;
794
795 auth = rpcauth_create(pseudoflavour, server->client);
796 if (IS_ERR(auth)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700797 dprintk("%s: couldn't create credcache!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400798 return PTR_ERR(auth);
799 }
800 }
801 server->client->cl_softrtry = 0;
802 if (server->flags & NFS_MOUNT_SOFT)
803 server->client->cl_softrtry = 1;
804
David Howells54ceac42006-08-22 20:06:13 -0400805 return 0;
806}
807
808/*
809 * Initialise an NFS2 or NFS3 client
810 */
Andy Adamson45a52a02011-03-01 01:34:08 +0000811int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms,
812 const char *ip_addr, rpc_authflavor_t authflavour,
813 int noresvport)
David Howells54ceac42006-08-22 20:06:13 -0400814{
David Howells54ceac42006-08-22 20:06:13 -0400815 int error;
816
817 if (clp->cl_cons_state == NFS_CS_READY) {
818 /* the client is already initialised */
819 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
820 return 0;
821 }
822
David Howells54ceac42006-08-22 20:06:13 -0400823 /*
824 * Create a client RPC handle for doing FSSTAT with UNIX auth only
825 * - RFC 2623, sec 2.3.2
826 */
Chuck Leverd7403512008-12-23 15:21:37 -0500827 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX,
Andy Adamson45a52a02011-03-01 01:34:08 +0000828 0, noresvport);
David Howells54ceac42006-08-22 20:06:13 -0400829 if (error < 0)
830 goto error;
831 nfs_mark_client_ready(clp, NFS_CS_READY);
832 return 0;
833
834error:
835 nfs_mark_client_ready(clp, error);
836 dprintk("<-- nfs_init_client() = xerror %d\n", error);
837 return error;
838}
839
840/*
841 * Create a version 2 or 3 client
842 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400843static int nfs_init_server(struct nfs_server *server,
844 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -0400845{
Trond Myklebust3a498022007-12-14 14:56:04 -0500846 struct nfs_client_initdata cl_init = {
847 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500848 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500849 .addrlen = data->nfs_server.addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -0500850 .rpc_ops = &nfs_v2_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500851 .proto = data->nfs_server.protocol,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400852 .net = data->net,
Trond Myklebust3a498022007-12-14 14:56:04 -0500853 };
Trond Myklebust33170232007-12-20 16:03:59 -0500854 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400855 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500856 int error;
David Howells54ceac42006-08-22 20:06:13 -0400857
858 dprintk("--> nfs_init_server()\n");
859
860#ifdef CONFIG_NFS_V3
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400861 if (data->version == 3)
Trond Myklebust40c553192007-12-14 14:56:07 -0500862 cl_init.rpc_ops = &nfs_v3_clientops;
David Howells54ceac42006-08-22 20:06:13 -0400863#endif
864
Andy Adamson45a52a02011-03-01 01:34:08 +0000865 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
866 data->timeo, data->retrans);
867
David Howells54ceac42006-08-22 20:06:13 -0400868 /* Allocate or find a client reference we can use */
Andy Adamson45a52a02011-03-01 01:34:08 +0000869 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX,
870 data->flags & NFS_MOUNT_NORESVPORT);
David Howells54ceac42006-08-22 20:06:13 -0400871 if (IS_ERR(clp)) {
872 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
873 return PTR_ERR(clp);
874 }
875
David Howells54ceac42006-08-22 20:06:13 -0400876 server->nfs_client = clp;
877
878 /* Initialise the client representation from the mount data */
Trond Myklebustff3525a2008-08-15 16:59:14 -0400879 server->flags = data->flags;
David Howellsb797cac2009-04-03 16:42:48 +0100880 server->options = data->options;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400881 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
882 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
883 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
David Howells54ceac42006-08-22 20:06:13 -0400884
885 if (data->rsize)
886 server->rsize = nfs_block_size(data->rsize, NULL);
887 if (data->wsize)
888 server->wsize = nfs_block_size(data->wsize, NULL);
889
890 server->acregmin = data->acregmin * HZ;
891 server->acregmax = data->acregmax * HZ;
892 server->acdirmin = data->acdirmin * HZ;
893 server->acdirmax = data->acdirmax * HZ;
894
895 /* Start lockd here, before we might error out */
896 error = nfs_start_lockd(server);
897 if (error < 0)
898 goto error;
899
Chuck Leverf22d6d72008-03-14 14:10:22 -0400900 server->port = data->nfs_server.port;
901
Trond Myklebust33170232007-12-20 16:03:59 -0500902 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -0400903 if (error < 0)
904 goto error;
905
Chuck Lever3f8400d2008-03-14 14:10:30 -0400906 /* Preserve the values of mount_server-related mount options */
907 if (data->mount_server.addrlen) {
908 memcpy(&server->mountd_address, &data->mount_server.address,
909 data->mount_server.addrlen);
910 server->mountd_addrlen = data->mount_server.addrlen;
911 }
912 server->mountd_version = data->mount_server.version;
913 server->mountd_port = data->mount_server.port;
914 server->mountd_protocol = data->mount_server.protocol;
915
David Howells54ceac42006-08-22 20:06:13 -0400916 server->namelen = data->namlen;
917 /* Create a client RPC handle for the NFSv3 ACL management interface */
918 nfs_init_server_aclclient(server);
David Howells54ceac42006-08-22 20:06:13 -0400919 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
920 return 0;
921
922error:
923 server->nfs_client = NULL;
924 nfs_put_client(clp);
925 dprintk("<-- nfs_init_server() = xerror %d\n", error);
926 return error;
927}
928
929/*
930 * Load up the server record from information gained in an fsinfo record
931 */
Benny Halevy738fd0f32011-07-30 20:52:36 -0400932static void nfs_server_set_fsinfo(struct nfs_server *server,
933 struct nfs_fh *mntfh,
934 struct nfs_fsinfo *fsinfo)
David Howells54ceac42006-08-22 20:06:13 -0400935{
936 unsigned long max_rpc_payload;
937
938 /* Work out a lot of parameters */
939 if (server->rsize == 0)
940 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
941 if (server->wsize == 0)
942 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
943
944 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
945 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
946 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
947 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
948
949 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
950 if (server->rsize > max_rpc_payload)
951 server->rsize = max_rpc_payload;
952 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
953 server->rsize = NFS_MAX_FILE_IO_SIZE;
954 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700955
Jens Axboed9938312009-06-12 14:45:52 +0200956 server->backing_dev_info.name = "nfs";
David Howells54ceac42006-08-22 20:06:13 -0400957 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
958
959 if (server->wsize > max_rpc_payload)
960 server->wsize = max_rpc_payload;
961 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
962 server->wsize = NFS_MAX_FILE_IO_SIZE;
963 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Fred Isamandae100c2011-07-30 20:52:37 -0400964 server->pnfs_blksize = fsinfo->blksize;
Benny Halevy738fd0f32011-07-30 20:52:36 -0400965 set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400966
David Howells54ceac42006-08-22 20:06:13 -0400967 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
968
969 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -0400970 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
971 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
David Howells54ceac42006-08-22 20:06:13 -0400972 if (server->dtsize > server->rsize)
973 server->dtsize = server->rsize;
974
975 if (server->flags & NFS_MOUNT_NOAC) {
976 server->acregmin = server->acregmax = 0;
977 server->acdirmin = server->acdirmax = 0;
978 }
979
980 server->maxfilesize = fsinfo->maxfilesize;
981
Ricardo Labiaga6b967242010-10-12 16:30:05 -0700982 server->time_delta = fsinfo->time_delta;
983
David Howells54ceac42006-08-22 20:06:13 -0400984 /* We're airborne Set socket buffersize */
985 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
986}
987
988/*
989 * Probe filesystem information, including the FSID on v2/v3
990 */
991static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
992{
993 struct nfs_fsinfo fsinfo;
994 struct nfs_client *clp = server->nfs_client;
995 int error;
996
997 dprintk("--> nfs_probe_fsinfo()\n");
998
999 if (clp->rpc_ops->set_capabilities != NULL) {
1000 error = clp->rpc_ops->set_capabilities(server, mntfh);
1001 if (error < 0)
1002 goto out_error;
1003 }
1004
1005 fsinfo.fattr = fattr;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -04001006 fsinfo.layouttype = 0;
David Howells54ceac42006-08-22 20:06:13 -04001007 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
1008 if (error < 0)
1009 goto out_error;
1010
Benny Halevy738fd0f32011-07-30 20:52:36 -04001011 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001012
1013 /* Get some general file system info */
1014 if (server->namelen == 0) {
1015 struct nfs_pathconf pathinfo;
1016
1017 pathinfo.fattr = fattr;
1018 nfs_fattr_init(fattr);
1019
1020 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
1021 server->namelen = pathinfo.max_namelen;
1022 }
1023
1024 dprintk("<-- nfs_probe_fsinfo() = 0\n");
1025 return 0;
1026
1027out_error:
1028 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
1029 return error;
1030}
1031
1032/*
1033 * Copy useful information when duplicating a server record
1034 */
1035static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
1036{
1037 target->flags = source->flags;
Chuck Lever356e76b2010-04-22 15:35:56 -04001038 target->rsize = source->rsize;
1039 target->wsize = source->wsize;
David Howells54ceac42006-08-22 20:06:13 -04001040 target->acregmin = source->acregmin;
1041 target->acregmax = source->acregmax;
1042 target->acdirmin = source->acdirmin;
1043 target->acdirmax = source->acdirmax;
1044 target->caps = source->caps;
David Howells2df54802009-09-23 14:36:39 -04001045 target->options = source->options;
David Howells54ceac42006-08-22 20:06:13 -04001046}
1047
Chuck Leverfca52382010-12-24 01:32:32 +00001048static void nfs_server_insert_lists(struct nfs_server *server)
1049{
1050 struct nfs_client *clp = server->nfs_client;
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001051 struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
Chuck Leverfca52382010-12-24 01:32:32 +00001052
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001053 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +00001054 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001055 list_add_tail(&server->master_link, &nn->nfs_volume_list);
Andy Adamsond3b4c9d2011-03-01 01:34:10 +00001056 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001057 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +00001058
1059}
1060
1061static void nfs_server_remove_lists(struct nfs_server *server)
1062{
Andy Adamsond3b4c9d2011-03-01 01:34:10 +00001063 struct nfs_client *clp = server->nfs_client;
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001064 struct nfs_net *nn;
Andy Adamsond3b4c9d2011-03-01 01:34:10 +00001065
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001066 if (clp == NULL)
1067 return;
1068 nn = net_generic(clp->net, nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001069 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +00001070 list_del_rcu(&server->client_link);
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001071 if (list_empty(&clp->cl_superblocks))
Andy Adamsond3b4c9d2011-03-01 01:34:10 +00001072 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Chuck Leverfca52382010-12-24 01:32:32 +00001073 list_del(&server->master_link);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001074 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +00001075
1076 synchronize_rcu();
1077}
1078
David Howells54ceac42006-08-22 20:06:13 -04001079/*
1080 * Allocate and initialise a server record
1081 */
1082static struct nfs_server *nfs_alloc_server(void)
1083{
1084 struct nfs_server *server;
1085
1086 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
1087 if (!server)
1088 return NULL;
1089
1090 server->client = server->client_acl = ERR_PTR(-EINVAL);
1091
1092 /* Zero out the NFS state stuff */
1093 INIT_LIST_HEAD(&server->client_link);
1094 INIT_LIST_HEAD(&server->master_link);
Chuck Leverd3978bb2010-12-24 01:33:04 +00001095 INIT_LIST_HEAD(&server->delegations);
Weston Andros Adamson6382a442011-06-01 16:44:44 -04001096 INIT_LIST_HEAD(&server->layouts);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001097 INIT_LIST_HEAD(&server->state_owners_lru);
David Howells54ceac42006-08-22 20:06:13 -04001098
Steve Dicksonef818a22007-11-08 04:05:04 -05001099 atomic_set(&server->active, 0);
1100
David Howells54ceac42006-08-22 20:06:13 -04001101 server->io_stats = nfs_alloc_iostats();
1102 if (!server->io_stats) {
1103 kfree(server);
1104 return NULL;
1105 }
1106
Jens Axboe48d07642009-09-21 09:59:39 +02001107 if (bdi_init(&server->backing_dev_info)) {
1108 nfs_free_iostats(server->io_stats);
1109 kfree(server);
1110 return NULL;
1111 }
1112
Trond Myklebust9157c312012-01-17 22:04:24 -05001113 ida_init(&server->openowner_id);
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001114 ida_init(&server->lockowner_id);
Fred Isamanf7e89172011-01-06 11:36:32 +00001115 pnfs_init_server(server);
1116
David Howells54ceac42006-08-22 20:06:13 -04001117 return server;
1118}
1119
1120/*
1121 * Free up a server record
1122 */
1123void nfs_free_server(struct nfs_server *server)
1124{
1125 dprintk("--> nfs_free_server()\n");
1126
Chuck Leverfca52382010-12-24 01:32:32 +00001127 nfs_server_remove_lists(server);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -04001128 unset_pnfs_layoutdriver(server);
David Howells54ceac42006-08-22 20:06:13 -04001129
1130 if (server->destroy != NULL)
1131 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -05001132
1133 if (!IS_ERR(server->client_acl))
1134 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -04001135 if (!IS_ERR(server->client))
1136 rpc_shutdown_client(server->client);
1137
1138 nfs_put_client(server->nfs_client);
1139
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001140 ida_destroy(&server->lockowner_id);
Trond Myklebust9157c312012-01-17 22:04:24 -05001141 ida_destroy(&server->openowner_id);
David Howells54ceac42006-08-22 20:06:13 -04001142 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -07001143 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -04001144 kfree(server);
1145 nfs_release_automount_timer();
1146 dprintk("<-- nfs_free_server()\n");
1147}
1148
1149/*
1150 * Create a version 2 or 3 volume record
1151 * - keyed on server and FSID
1152 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -04001153struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -04001154 struct nfs_fh *mntfh)
1155{
1156 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001157 struct nfs_fattr *fattr;
David Howells54ceac42006-08-22 20:06:13 -04001158 int error;
1159
1160 server = nfs_alloc_server();
1161 if (!server)
1162 return ERR_PTR(-ENOMEM);
1163
Trond Myklebustfbca7792010-04-16 16:22:46 -04001164 error = -ENOMEM;
1165 fattr = nfs_alloc_fattr();
1166 if (fattr == NULL)
1167 goto error;
1168
David Howells54ceac42006-08-22 20:06:13 -04001169 /* Get a client representation */
1170 error = nfs_init_server(server, data);
1171 if (error < 0)
1172 goto error;
1173
1174 BUG_ON(!server->nfs_client);
1175 BUG_ON(!server->nfs_client->rpc_ops);
1176 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1177
1178 /* Probe the root fh to retrieve its FSID */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001179 error = nfs_probe_fsinfo(server, mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001180 if (error < 0)
1181 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001182 if (server->nfs_client->rpc_ops->version == 3) {
1183 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1184 server->namelen = NFS3_MAXNAMLEN;
1185 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1186 server->caps |= NFS_CAP_READDIRPLUS;
1187 } else {
1188 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1189 server->namelen = NFS2_MAXNAMLEN;
1190 }
1191
Trond Myklebustfbca7792010-04-16 16:22:46 -04001192 if (!(fattr->valid & NFS_ATTR_FATTR)) {
1193 error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001194 if (error < 0) {
1195 dprintk("nfs_create_server: getattr error = %d\n", -error);
1196 goto error;
1197 }
1198 }
Trond Myklebustfbca7792010-04-16 16:22:46 -04001199 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
David Howells54ceac42006-08-22 20:06:13 -04001200
David Howells6daabf12006-08-24 15:44:16 -04001201 dprintk("Server FSID: %llx:%llx\n",
1202 (unsigned long long) server->fsid.major,
1203 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001204
Chuck Leverfca52382010-12-24 01:32:32 +00001205 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001206 server->mount_time = jiffies;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001207 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001208 return server;
1209
1210error:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001211 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001212 nfs_free_server(server);
1213 return ERR_PTR(error);
1214}
1215
1216#ifdef CONFIG_NFS_V4
1217/*
Andy Adamsonc36fca52011-01-06 02:04:32 +00001218 * NFSv4.0 callback thread helper
1219 *
Andy Adamsonc36fca52011-01-06 02:04:32 +00001220 * Find a client by callback identifier
1221 */
1222struct nfs_client *
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001223nfs4_find_client_ident(struct net *net, int cb_ident)
Andy Adamsonc36fca52011-01-06 02:04:32 +00001224{
1225 struct nfs_client *clp;
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001226 struct nfs_net *nn = net_generic(net, nfs_net_id);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001227
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001228 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001229 clp = idr_find(&nn->cb_ident_idr, cb_ident);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001230 if (clp)
1231 atomic_inc(&clp->cl_count);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001232 spin_unlock(&nn->nfs_client_lock);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001233 return clp;
1234}
1235
1236#if defined(CONFIG_NFS_V4_1)
1237/*
1238 * NFSv4.1 callback thread helper
1239 * For CB_COMPOUND calls, find a client by IP address, protocol version,
1240 * minorversion, and sessionID
1241 *
Andy Adamsonc36fca52011-01-06 02:04:32 +00001242 * Returns NULL if no such client
1243 */
1244struct nfs_client *
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +04001245nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
Andy Adamson778be232011-01-25 15:38:01 +00001246 struct nfs4_sessionid *sid)
Andy Adamsonc36fca52011-01-06 02:04:32 +00001247{
1248 struct nfs_client *clp;
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +04001249 struct nfs_net *nn = net_generic(net, nfs_net_id);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001250
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001251 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001252 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Andy Adamsonc36fca52011-01-06 02:04:32 +00001253 if (nfs4_cb_match_client(addr, clp, 1) == false)
1254 continue;
1255
1256 if (!nfs4_has_session(clp))
1257 continue;
1258
Andy Adamson778be232011-01-25 15:38:01 +00001259 /* Match sessionid*/
1260 if (memcmp(clp->cl_session->sess_id.data,
1261 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
Andy Adamsonc36fca52011-01-06 02:04:32 +00001262 continue;
1263
1264 atomic_inc(&clp->cl_count);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001265 spin_unlock(&nn->nfs_client_lock);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001266 return clp;
1267 }
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001268 spin_unlock(&nn->nfs_client_lock);
Andy Adamsonc36fca52011-01-06 02:04:32 +00001269 return NULL;
1270}
1271
1272#else /* CONFIG_NFS_V4_1 */
1273
1274struct nfs_client *
Stanislav Kinsburskyb6d1e832012-02-07 19:53:19 +04001275nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
Andy Adamson778be232011-01-25 15:38:01 +00001276 struct nfs4_sessionid *sid)
Andy Adamsonc36fca52011-01-06 02:04:32 +00001277{
1278 return NULL;
1279}
1280#endif /* CONFIG_NFS_V4_1 */
1281
1282/*
Benny Halevy9bdaa862009-04-01 09:22:55 -04001283 * Initialize the NFS4 callback service
1284 */
1285static int nfs4_init_callback(struct nfs_client *clp)
1286{
1287 int error;
1288
1289 if (clp->rpc_ops->version == 4) {
Trond Myklebust2446ab62012-03-01 17:00:56 -05001290 struct rpc_xprt *xprt;
1291
1292 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
1293
Andy Adamson0b5b7ae2009-04-01 09:23:15 -04001294 if (nfs4_has_session(clp)) {
Trond Myklebust2446ab62012-03-01 17:00:56 -05001295 error = xprt_setup_backchannel(xprt,
Andy Adamson0b5b7ae2009-04-01 09:23:15 -04001296 NFS41_BC_MIN_CALLBACKS);
1297 if (error < 0)
1298 return error;
1299 }
1300
Trond Myklebust2446ab62012-03-01 17:00:56 -05001301 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
Benny Halevy9bdaa862009-04-01 09:22:55 -04001302 if (error < 0) {
1303 dprintk("%s: failed to start callback. Error = %d\n",
1304 __func__, error);
1305 return error;
1306 }
1307 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
1308 }
1309 return 0;
1310}
1311
1312/*
Andy Adamson557134a2009-04-01 09:21:53 -04001313 * Initialize the minor version specific parts of an NFS4 client record
1314 */
1315static int nfs4_init_client_minor_version(struct nfs_client *clp)
1316{
1317#if defined(CONFIG_NFS_V4_1)
Trond Myklebust97dc1352010-06-16 09:52:26 -04001318 if (clp->cl_mvops->minor_version) {
Andy Adamson557134a2009-04-01 09:21:53 -04001319 struct nfs4_session *session = NULL;
1320 /*
1321 * Create the session and mark it expired.
1322 * When a SEQUENCE operation encounters the expired session
1323 * it will do session recovery to initialize it.
1324 */
1325 session = nfs4_alloc_session(clp);
1326 if (!session)
1327 return -ENOMEM;
1328
1329 clp->cl_session = session;
Trond Myklebustfe74ba32010-06-16 09:52:27 -04001330 /*
1331 * The create session reply races with the server back
1332 * channel probe. Mark the client NFS_CS_SESSION_INITING
1333 * so that the client back channel can find the
1334 * nfs_client struct
1335 */
1336 clp->cl_cons_state = NFS_CS_SESSION_INITING;
Andy Adamson557134a2009-04-01 09:21:53 -04001337 }
1338#endif /* CONFIG_NFS_V4_1 */
1339
Benny Halevy71468512009-04-01 09:22:56 -04001340 return nfs4_init_callback(clp);
Andy Adamson557134a2009-04-01 09:21:53 -04001341}
1342
1343/*
David Howells54ceac42006-08-22 20:06:13 -04001344 * Initialise an NFS4 client record
1345 */
Andy Adamson45a52a02011-03-01 01:34:08 +00001346int nfs4_init_client(struct nfs_client *clp,
1347 const struct rpc_timeout *timeparms,
1348 const char *ip_addr,
1349 rpc_authflavor_t authflavour,
1350 int noresvport)
David Howells54ceac42006-08-22 20:06:13 -04001351{
Chuck Lever31b8e2a2012-03-01 17:01:23 -05001352 char buf[INET6_ADDRSTRLEN + 1];
David Howells54ceac42006-08-22 20:06:13 -04001353 int error;
1354
1355 if (clp->cl_cons_state == NFS_CS_READY) {
1356 /* the client is initialised already */
1357 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
1358 return 0;
1359 }
1360
1361 /* Check NFS protocol revision and initialize RPC op vector */
1362 clp->rpc_ops = &nfs_v4_clientops;
1363
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001364 error = nfs_create_rpc_client(clp, timeparms, authflavour,
Andy Adamson45a52a02011-03-01 01:34:08 +00001365 1, noresvport);
David Howells54ceac42006-08-22 20:06:13 -04001366 if (error < 0)
1367 goto error;
Chuck Lever31b8e2a2012-03-01 17:01:23 -05001368
1369 /* If no clientaddr= option was specified, find a usable cb address */
1370 if (ip_addr == NULL) {
1371 struct sockaddr_storage cb_addr;
1372 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
1373
1374 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
1375 if (error < 0)
1376 goto error;
1377 error = rpc_ntop(sap, buf, sizeof(buf));
1378 if (error < 0)
1379 goto error;
1380 ip_addr = (const char *)buf;
1381 }
Ben Hutchingsf4373bf2009-10-06 15:42:18 -04001382 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
David Howells54ceac42006-08-22 20:06:13 -04001383
1384 error = nfs_idmap_new(clp);
1385 if (error < 0) {
1386 dprintk("%s: failed to create idmapper. Error = %d\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001387 __func__, error);
David Howells54ceac42006-08-22 20:06:13 -04001388 goto error;
1389 }
Trond Myklebust9c5bf382006-08-22 20:06:14 -04001390 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
David Howells54ceac42006-08-22 20:06:13 -04001391
Andy Adamson557134a2009-04-01 09:21:53 -04001392 error = nfs4_init_client_minor_version(clp);
1393 if (error < 0)
1394 goto error;
1395
Andy Adamson76db6d92009-04-01 09:22:38 -04001396 if (!nfs4_has_session(clp))
1397 nfs_mark_client_ready(clp, NFS_CS_READY);
David Howells54ceac42006-08-22 20:06:13 -04001398 return 0;
1399
1400error:
1401 nfs_mark_client_ready(clp, error);
1402 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
1403 return error;
1404}
1405
1406/*
1407 * Set up an NFS4 client
1408 */
1409static int nfs4_set_client(struct nfs_server *server,
Chuck Leverdcecae02007-12-10 14:58:59 -05001410 const char *hostname,
1411 const struct sockaddr *addr,
1412 const size_t addrlen,
J. Bruce Fields7d9ac062006-10-19 23:28:39 -07001413 const char *ip_addr,
David Howells54ceac42006-08-22 20:06:13 -04001414 rpc_authflavor_t authflavour,
Benny Halevy94a417f2009-04-01 09:21:49 -04001415 int proto, const struct rpc_timeout *timeparms,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +04001416 u32 minorversion, struct net *net)
David Howells54ceac42006-08-22 20:06:13 -04001417{
Trond Myklebust3a498022007-12-14 14:56:04 -05001418 struct nfs_client_initdata cl_init = {
1419 .hostname = hostname,
Chuck Leverdcecae02007-12-10 14:58:59 -05001420 .addr = addr,
1421 .addrlen = addrlen,
Trond Myklebust40c553192007-12-14 14:56:07 -05001422 .rpc_ops = &nfs_v4_clientops,
Trond Myklebust59dca3b2008-01-03 16:29:06 -05001423 .proto = proto,
Benny Halevy5aae4a92009-04-01 09:21:50 -04001424 .minorversion = minorversion,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +04001425 .net = net,
Trond Myklebust3a498022007-12-14 14:56:04 -05001426 };
David Howells54ceac42006-08-22 20:06:13 -04001427 struct nfs_client *clp;
1428 int error;
1429
1430 dprintk("--> nfs4_set_client()\n");
1431
1432 /* Allocate or find a client reference we can use */
Andy Adamson45a52a02011-03-01 01:34:08 +00001433 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour,
1434 server->flags & NFS_MOUNT_NORESVPORT);
David Howells54ceac42006-08-22 20:06:13 -04001435 if (IS_ERR(clp)) {
1436 error = PTR_ERR(clp);
1437 goto error;
1438 }
David Howells54ceac42006-08-22 20:06:13 -04001439
Andy Adamsond6fb79d2011-03-01 01:34:11 +00001440 /*
1441 * Query for the lease time on clientid setup or renewal
1442 *
1443 * Note that this will be set on nfs_clients that were created
1444 * only for the DS role and did not set this bit, but now will
1445 * serve a dual role.
1446 */
1447 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
1448
David Howells54ceac42006-08-22 20:06:13 -04001449 server->nfs_client = clp;
1450 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
1451 return 0;
David Howells54ceac42006-08-22 20:06:13 -04001452error:
1453 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
1454 return error;
1455}
1456
Andy Adamsond83217c2011-03-01 01:34:17 +00001457/*
1458 * Set up a pNFS Data Server client.
1459 *
1460 * Return any existing nfs_client that matches server address,port,version
1461 * and minorversion.
1462 *
1463 * For a new nfs_client, use a soft mount (default), a low retrans and a
1464 * low timeout interval so that if a connection is lost, we retry through
1465 * the MDS.
1466 */
1467struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
1468 const struct sockaddr *ds_addr,
1469 int ds_addrlen, int ds_proto)
1470{
1471 struct nfs_client_initdata cl_init = {
1472 .addr = ds_addr,
1473 .addrlen = ds_addrlen,
1474 .rpc_ops = &nfs_v4_clientops,
1475 .proto = ds_proto,
1476 .minorversion = mds_clp->cl_minorversion,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +04001477 .net = mds_clp->net,
Andy Adamsond83217c2011-03-01 01:34:17 +00001478 };
1479 struct rpc_timeout ds_timeout = {
1480 .to_initval = 15 * HZ,
1481 .to_maxval = 15 * HZ,
1482 .to_retries = 1,
1483 .to_exponential = 1,
1484 };
1485 struct nfs_client *clp;
1486
1487 /*
1488 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
1489 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
1490 * (section 13.1 RFC 5661).
1491 */
1492 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
1493 mds_clp->cl_rpcclient->cl_auth->au_flavor, 0);
1494
1495 dprintk("<-- %s %p\n", __func__, clp);
1496 return clp;
1497}
Trond Myklebust94b134a2011-07-13 19:26:49 -04001498EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
Andy Adamson557134a2009-04-01 09:21:53 -04001499
1500/*
Andy Adamson96b09e02009-04-01 09:22:33 -04001501 * Session has been established, and the client marked ready.
1502 * Set the mount rsize and wsize with negotiated fore channel
1503 * attributes which will be bound checked in nfs_server_set_fsinfo.
1504 */
1505static void nfs4_session_set_rwsize(struct nfs_server *server)
1506{
1507#ifdef CONFIG_NFS_V4_1
Alexandros Batsakis2449ea22009-12-05 13:36:55 -05001508 struct nfs4_session *sess;
1509 u32 server_resp_sz;
1510 u32 server_rqst_sz;
1511
Andy Adamson96b09e02009-04-01 09:22:33 -04001512 if (!nfs4_has_session(server->nfs_client))
1513 return;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -05001514 sess = server->nfs_client->cl_session;
1515 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
1516 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
1517
1518 if (server->rsize > server_resp_sz)
1519 server->rsize = server_resp_sz;
1520 if (server->wsize > server_rqst_sz)
1521 server->wsize = server_rqst_sz;
Andy Adamson96b09e02009-04-01 09:22:33 -04001522#endif /* CONFIG_NFS_V4_1 */
1523}
1524
Trond Myklebust44950b62010-06-17 11:45:12 -04001525static int nfs4_server_common_setup(struct nfs_server *server,
1526 struct nfs_fh *mntfh)
1527{
1528 struct nfs_fattr *fattr;
1529 int error;
1530
1531 BUG_ON(!server->nfs_client);
1532 BUG_ON(!server->nfs_client->rpc_ops);
1533 BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
1534
Andy Adamson94de8b22011-03-01 01:34:12 +00001535 /* data servers support only a subset of NFSv4.1 */
1536 if (is_ds_only_client(server->nfs_client))
1537 return -EPROTONOSUPPORT;
1538
Trond Myklebust44950b62010-06-17 11:45:12 -04001539 fattr = nfs_alloc_fattr();
1540 if (fattr == NULL)
1541 return -ENOMEM;
1542
1543 /* We must ensure the session is initialised first */
1544 error = nfs4_init_session(server);
1545 if (error < 0)
1546 goto out;
1547
1548 /* Probe the root fh to retrieve its FSID and filehandle */
1549 error = nfs4_get_rootfh(server, mntfh);
1550 if (error < 0)
1551 goto out;
1552
1553 dprintk("Server FSID: %llx:%llx\n",
1554 (unsigned long long) server->fsid.major,
1555 (unsigned long long) server->fsid.minor);
1556 dprintk("Mount FH: %d\n", mntfh->size);
1557
1558 nfs4_session_set_rwsize(server);
1559
1560 error = nfs_probe_fsinfo(server, mntfh, fattr);
1561 if (error < 0)
1562 goto out;
1563
1564 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1565 server->namelen = NFS4_MAXNAMLEN;
1566
Chuck Leverfca52382010-12-24 01:32:32 +00001567 nfs_server_insert_lists(server);
Trond Myklebust44950b62010-06-17 11:45:12 -04001568 server->mount_time = jiffies;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001569 server->destroy = nfs4_destroy_server;
Trond Myklebust44950b62010-06-17 11:45:12 -04001570out:
1571 nfs_free_fattr(fattr);
1572 return error;
1573}
1574
Andy Adamson96b09e02009-04-01 09:22:33 -04001575/*
David Howells54ceac42006-08-22 20:06:13 -04001576 * Create a version 4 volume record
1577 */
1578static int nfs4_init_server(struct nfs_server *server,
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001579 const struct nfs_parsed_mount_data *data)
David Howells54ceac42006-08-22 20:06:13 -04001580{
Trond Myklebust33170232007-12-20 16:03:59 -05001581 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -04001582 int error;
1583
1584 dprintk("--> nfs4_init_server()\n");
1585
Trond Myklebust33170232007-12-20 16:03:59 -05001586 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
1587 data->timeo, data->retrans);
1588
Chuck Lever542fcc32008-12-23 15:21:36 -05001589 /* Initialise the client representation from the mount data */
1590 server->flags = data->flags;
Bryan Schumaker82f2e542010-10-21 16:33:18 -04001591 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
1592 if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
1593 server->caps |= NFS_CAP_READDIRPLUS;
David Howellsb797cac2009-04-03 16:42:48 +01001594 server->options = data->options;
Chuck Lever542fcc32008-12-23 15:21:36 -05001595
Trond Myklebust33170232007-12-20 16:03:59 -05001596 /* Get a client record */
1597 error = nfs4_set_client(server,
1598 data->nfs_server.hostname,
1599 (const struct sockaddr *)&data->nfs_server.address,
1600 data->nfs_server.addrlen,
1601 data->client_address,
1602 data->auth_flavors[0],
1603 data->nfs_server.protocol,
Benny Halevy94a417f2009-04-01 09:21:49 -04001604 &timeparms,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +04001605 data->minorversion,
1606 data->net);
Trond Myklebust33170232007-12-20 16:03:59 -05001607 if (error < 0)
1608 goto error;
1609
Trond Myklebustb064eca22011-02-22 15:44:32 -08001610 /*
1611 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
1612 * authentication.
1613 */
1614 if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
1615 server->caps |= NFS_CAP_UIDGID_NOMAP;
1616
David Howells54ceac42006-08-22 20:06:13 -04001617 if (data->rsize)
1618 server->rsize = nfs_block_size(data->rsize, NULL);
1619 if (data->wsize)
1620 server->wsize = nfs_block_size(data->wsize, NULL);
1621
1622 server->acregmin = data->acregmin * HZ;
1623 server->acregmax = data->acregmax * HZ;
1624 server->acdirmin = data->acdirmin * HZ;
1625 server->acdirmax = data->acdirmax * HZ;
1626
Chuck Leverf22d6d72008-03-14 14:10:22 -04001627 server->port = data->nfs_server.port;
1628
Trond Myklebust33170232007-12-20 16:03:59 -05001629 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
David Howells54ceac42006-08-22 20:06:13 -04001630
Trond Myklebust33170232007-12-20 16:03:59 -05001631error:
David Howells54ceac42006-08-22 20:06:13 -04001632 /* Done */
1633 dprintk("<-- nfs4_init_server() = %d\n", error);
1634 return error;
1635}
1636
1637/*
1638 * Create a version 4 volume record
1639 * - keyed on server and FSID
1640 */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001641struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
David Howells54ceac42006-08-22 20:06:13 -04001642 struct nfs_fh *mntfh)
1643{
David Howells54ceac42006-08-22 20:06:13 -04001644 struct nfs_server *server;
1645 int error;
1646
1647 dprintk("--> nfs4_create_server()\n");
1648
1649 server = nfs_alloc_server();
1650 if (!server)
1651 return ERR_PTR(-ENOMEM);
1652
David Howells54ceac42006-08-22 20:06:13 -04001653 /* set up the general RPC client */
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -04001654 error = nfs4_init_server(server, data);
David Howells54ceac42006-08-22 20:06:13 -04001655 if (error < 0)
1656 goto error;
1657
Trond Myklebust44950b62010-06-17 11:45:12 -04001658 error = nfs4_server_common_setup(server, mntfh);
Trond Myklebustfccba802009-07-21 16:48:07 -04001659 if (error < 0)
1660 goto error;
Andy Adamson557134a2009-04-01 09:21:53 -04001661
David Howells54ceac42006-08-22 20:06:13 -04001662 dprintk("<-- nfs4_create_server() = %p\n", server);
1663 return server;
1664
1665error:
1666 nfs_free_server(server);
1667 dprintk("<-- nfs4_create_server() = error %d\n", error);
1668 return ERR_PTR(error);
1669}
1670
1671/*
1672 * Create an NFS4 referral server record
1673 */
1674struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001675 struct nfs_fh *mntfh)
David Howells54ceac42006-08-22 20:06:13 -04001676{
1677 struct nfs_client *parent_client;
1678 struct nfs_server *server, *parent_server;
David Howells54ceac42006-08-22 20:06:13 -04001679 int error;
1680
1681 dprintk("--> nfs4_create_referral_server()\n");
1682
1683 server = nfs_alloc_server();
1684 if (!server)
1685 return ERR_PTR(-ENOMEM);
1686
1687 parent_server = NFS_SB(data->sb);
1688 parent_client = parent_server->nfs_client;
1689
Chuck Lever542fcc32008-12-23 15:21:36 -05001690 /* Initialise the client representation from the parent server */
1691 nfs_server_copy_userdata(server, parent_server);
Trond Myklebust62ab4602009-08-09 15:06:19 -04001692 server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
Chuck Lever542fcc32008-12-23 15:21:36 -05001693
David Howells54ceac42006-08-22 20:06:13 -04001694 /* Get a client representation.
1695 * Note: NFSv4 always uses TCP, */
Chuck Leverdcecae02007-12-10 14:58:59 -05001696 error = nfs4_set_client(server, data->hostname,
Chuck Lever6677d092007-12-10 14:59:06 -05001697 data->addr,
1698 data->addrlen,
Chuck Leverdcecae02007-12-10 14:58:59 -05001699 parent_client->cl_ipaddr,
1700 data->authflavor,
Trond Myklebust2446ab62012-03-01 17:00:56 -05001701 rpc_protocol(parent_server->client),
Benny Halevy94a417f2009-04-01 09:21:49 -04001702 parent_server->client->cl_timeout,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +04001703 parent_client->cl_mvops->minor_version,
1704 parent_client->net);
andros@citi.umich.edu297de4f2006-08-29 12:19:41 -04001705 if (error < 0)
1706 goto error;
David Howells54ceac42006-08-22 20:06:13 -04001707
Trond Myklebust33170232007-12-20 16:03:59 -05001708 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
David Howells54ceac42006-08-22 20:06:13 -04001709 if (error < 0)
1710 goto error;
1711
Trond Myklebust44950b62010-06-17 11:45:12 -04001712 error = nfs4_server_common_setup(server, mntfh);
Trond Myklebustf2d0d852007-02-02 14:46:09 -08001713 if (error < 0)
1714 goto error;
1715
David Howells54ceac42006-08-22 20:06:13 -04001716 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1717 return server;
1718
1719error:
1720 nfs_free_server(server);
1721 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1722 return ERR_PTR(error);
1723}
1724
1725#endif /* CONFIG_NFS_V4 */
1726
1727/*
1728 * Clone an NFS2, NFS3 or NFS4 server record
1729 */
1730struct nfs_server *nfs_clone_server(struct nfs_server *source,
1731 struct nfs_fh *fh,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001732 struct nfs_fattr *fattr,
1733 rpc_authflavor_t flavor)
David Howells54ceac42006-08-22 20:06:13 -04001734{
1735 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001736 struct nfs_fattr *fattr_fsinfo;
David Howells54ceac42006-08-22 20:06:13 -04001737 int error;
1738
1739 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001740 (unsigned long long) fattr->fsid.major,
1741 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001742
1743 server = nfs_alloc_server();
1744 if (!server)
1745 return ERR_PTR(-ENOMEM);
1746
Trond Myklebustfbca7792010-04-16 16:22:46 -04001747 error = -ENOMEM;
1748 fattr_fsinfo = nfs_alloc_fattr();
1749 if (fattr_fsinfo == NULL)
1750 goto out_free_server;
1751
David Howells54ceac42006-08-22 20:06:13 -04001752 /* Copy data from the source */
1753 server->nfs_client = source->nfs_client;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001754 server->destroy = source->destroy;
David Howells54ceac42006-08-22 20:06:13 -04001755 atomic_inc(&server->nfs_client->cl_count);
1756 nfs_server_copy_userdata(server, source);
1757
1758 server->fsid = fattr->fsid;
1759
Trond Myklebust33170232007-12-20 16:03:59 -05001760 error = nfs_init_server_rpcclient(server,
1761 source->client->cl_timeout,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001762 flavor);
David Howells54ceac42006-08-22 20:06:13 -04001763 if (error < 0)
1764 goto out_free_server;
1765 if (!IS_ERR(source->client_acl))
1766 nfs_init_server_aclclient(server);
1767
1768 /* probe the filesystem info for this server filesystem */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001769 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001770 if (error < 0)
1771 goto out_free_server;
1772
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001773 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1774 server->namelen = NFS4_MAXNAMLEN;
1775
David Howells54ceac42006-08-22 20:06:13 -04001776 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001777 (unsigned long long) server->fsid.major,
1778 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001779
1780 error = nfs_start_lockd(server);
1781 if (error < 0)
1782 goto out_free_server;
1783
Chuck Leverfca52382010-12-24 01:32:32 +00001784 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001785 server->mount_time = jiffies;
1786
Trond Myklebustfbca7792010-04-16 16:22:46 -04001787 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001788 dprintk("<-- nfs_clone_server() = %p\n", server);
1789 return server;
1790
1791out_free_server:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001792 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001793 nfs_free_server(server);
1794 dprintk("<-- nfs_clone_server() = error %d\n", error);
1795 return ERR_PTR(error);
1796}
David Howells6aaca562006-08-22 20:06:13 -04001797
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001798void nfs_clients_init(struct net *net)
1799{
1800 struct nfs_net *nn = net_generic(net, nfs_net_id);
1801
1802 INIT_LIST_HEAD(&nn->nfs_client_list);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001803 INIT_LIST_HEAD(&nn->nfs_volume_list);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001804#ifdef CONFIG_NFS_V4
1805 idr_init(&nn->cb_ident_idr);
1806#endif
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001807 spin_lock_init(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001808}
1809
David Howells6aaca562006-08-22 20:06:13 -04001810#ifdef CONFIG_PROC_FS
1811static struct proc_dir_entry *proc_fs_nfs;
1812
1813static int nfs_server_list_open(struct inode *inode, struct file *file);
1814static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1815static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1816static void nfs_server_list_stop(struct seq_file *p, void *v);
1817static int nfs_server_list_show(struct seq_file *m, void *v);
1818
James Morris88e9d342009-09-22 16:43:43 -07001819static const struct seq_operations nfs_server_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001820 .start = nfs_server_list_start,
1821 .next = nfs_server_list_next,
1822 .stop = nfs_server_list_stop,
1823 .show = nfs_server_list_show,
1824};
1825
Arjan van de Ven00977a52007-02-12 00:55:34 -08001826static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001827 .open = nfs_server_list_open,
1828 .read = seq_read,
1829 .llseek = seq_lseek,
1830 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001831 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001832};
1833
1834static int nfs_volume_list_open(struct inode *inode, struct file *file);
1835static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1836static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1837static void nfs_volume_list_stop(struct seq_file *p, void *v);
1838static int nfs_volume_list_show(struct seq_file *m, void *v);
1839
James Morris88e9d342009-09-22 16:43:43 -07001840static const struct seq_operations nfs_volume_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001841 .start = nfs_volume_list_start,
1842 .next = nfs_volume_list_next,
1843 .stop = nfs_volume_list_stop,
1844 .show = nfs_volume_list_show,
1845};
1846
Arjan van de Ven00977a52007-02-12 00:55:34 -08001847static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001848 .open = nfs_volume_list_open,
1849 .read = seq_read,
1850 .llseek = seq_lseek,
1851 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001852 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001853};
1854
1855/*
1856 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1857 * we're dealing
1858 */
1859static int nfs_server_list_open(struct inode *inode, struct file *file)
1860{
1861 struct seq_file *m;
1862 int ret;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001863 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1864 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
David Howells6aaca562006-08-22 20:06:13 -04001865
1866 ret = seq_open(file, &nfs_server_list_ops);
1867 if (ret < 0)
1868 return ret;
1869
1870 m = file->private_data;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001871 m->private = net;
David Howells6aaca562006-08-22 20:06:13 -04001872
1873 return 0;
1874}
1875
1876/*
1877 * set up the iterator to start reading from the server list and return the first item
1878 */
1879static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1880{
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001881 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1882
David Howells6aaca562006-08-22 20:06:13 -04001883 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001884 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001885 return seq_list_start_head(&nn->nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001886}
1887
1888/*
1889 * move to next server
1890 */
1891static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1892{
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001893 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1894
1895 return seq_list_next(v, &nn->nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001896}
1897
1898/*
1899 * clean up after reading from the transports list
1900 */
1901static void nfs_server_list_stop(struct seq_file *p, void *v)
1902{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001903 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1904
1905 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001906}
1907
1908/*
1909 * display a header line followed by a load of call lines
1910 */
1911static int nfs_server_list_show(struct seq_file *m, void *v)
1912{
1913 struct nfs_client *clp;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001914 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001915
1916 /* display header on line 1 */
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001917 if (v == &nn->nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001918 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1919 return 0;
1920 }
1921
1922 /* display one transport per line on subsequent lines */
1923 clp = list_entry(v, struct nfs_client, cl_share_link);
1924
Malahal Naineni940aab42011-09-20 17:27:14 -07001925 /* Check if the client is initialized */
1926 if (clp->cl_cons_state != NFS_CS_READY)
1927 return 0;
1928
Trond Myklebust2446ab62012-03-01 17:00:56 -05001929 rcu_read_lock();
Chuck Lever5d8515c2007-12-10 14:57:16 -05001930 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001931 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001932 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1933 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001934 atomic_read(&clp->cl_count),
1935 clp->cl_hostname);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001936 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001937
1938 return 0;
1939}
1940
1941/*
1942 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1943 */
1944static int nfs_volume_list_open(struct inode *inode, struct file *file)
1945{
1946 struct seq_file *m;
1947 int ret;
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001948 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1949 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
David Howells6aaca562006-08-22 20:06:13 -04001950
1951 ret = seq_open(file, &nfs_volume_list_ops);
1952 if (ret < 0)
1953 return ret;
1954
1955 m = file->private_data;
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001956 m->private = net;
David Howells6aaca562006-08-22 20:06:13 -04001957
1958 return 0;
1959}
1960
1961/*
1962 * set up the iterator to start reading from the volume list and return the first item
1963 */
1964static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1965{
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001966 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1967
David Howells6aaca562006-08-22 20:06:13 -04001968 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001969 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001970 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001971}
1972
1973/*
1974 * move to next volume
1975 */
1976static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1977{
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001978 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1979
1980 return seq_list_next(v, &nn->nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001981}
1982
1983/*
1984 * clean up after reading from the transports list
1985 */
1986static void nfs_volume_list_stop(struct seq_file *p, void *v)
1987{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001988 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1989
1990 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001991}
1992
1993/*
1994 * display a header line followed by a load of call lines
1995 */
1996static int nfs_volume_list_show(struct seq_file *m, void *v)
1997{
1998 struct nfs_server *server;
1999 struct nfs_client *clp;
2000 char dev[8], fsid[17];
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00002001 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04002002
2003 /* display header on line 1 */
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00002004 if (v == &nn->nfs_volume_list) {
David Howells5d1acff2009-04-03 16:42:47 +01002005 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
David Howells6aaca562006-08-22 20:06:13 -04002006 return 0;
2007 }
2008 /* display one transport per line on subsequent lines */
2009 server = list_entry(v, struct nfs_server, master_link);
2010 clp = server->nfs_client;
2011
2012 snprintf(dev, 8, "%u:%u",
2013 MAJOR(server->s_dev), MINOR(server->s_dev));
2014
2015 snprintf(fsid, 17, "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04002016 (unsigned long long) server->fsid.major,
2017 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04002018
Trond Myklebust2446ab62012-03-01 17:00:56 -05002019 rcu_read_lock();
David Howells5d1acff2009-04-03 16:42:47 +01002020 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05002021 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05002022 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
2023 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04002024 dev,
David Howells5d1acff2009-04-03 16:42:47 +01002025 fsid,
2026 nfs_server_fscache_state(server));
Trond Myklebust2446ab62012-03-01 17:00:56 -05002027 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04002028
2029 return 0;
2030}
2031
2032/*
2033 * initialise the /proc/fs/nfsfs/ directory
2034 */
2035int __init nfs_fs_proc_init(void)
2036{
2037 struct proc_dir_entry *p;
2038
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07002039 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04002040 if (!proc_fs_nfs)
2041 goto error_0;
2042
David Howells6aaca562006-08-22 20:06:13 -04002043 /* a file of servers with which we're dealing */
Denis V. Lunev34b37232008-04-29 01:02:07 -07002044 p = proc_create("servers", S_IFREG|S_IRUGO,
2045 proc_fs_nfs, &nfs_server_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04002046 if (!p)
2047 goto error_1;
2048
David Howells6aaca562006-08-22 20:06:13 -04002049 /* a file of volumes that we have mounted */
Denis V. Lunev34b37232008-04-29 01:02:07 -07002050 p = proc_create("volumes", S_IFREG|S_IRUGO,
2051 proc_fs_nfs, &nfs_volume_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04002052 if (!p)
2053 goto error_2;
David Howells6aaca562006-08-22 20:06:13 -04002054 return 0;
2055
2056error_2:
2057 remove_proc_entry("servers", proc_fs_nfs);
2058error_1:
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07002059 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04002060error_0:
2061 return -ENOMEM;
2062}
2063
2064/*
2065 * clean up the /proc/fs/nfsfs/ directory
2066 */
2067void nfs_fs_proc_exit(void)
2068{
2069 remove_proc_entry("volumes", proc_fs_nfs);
2070 remove_proc_entry("servers", proc_fs_nfs);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07002071 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04002072}
2073
2074#endif /* CONFIG_PROC_FS */
Trond Myklebustb064eca22011-02-22 15:44:32 -08002075
2076module_param(nfs4_disable_idmapping, bool, 0644);
2077MODULE_PARM_DESC(nfs4_disable_idmapping,
2078 "Turn off NFSv4 idmapping when using 'sec=sys'");