blob: 1d09289c8f0e370dd3f45a17a7c077246b23d7da [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"
Bryan Schumakerab7017a2012-07-30 16:05:16 -040054#include "nfs.h"
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +000055#include "netns.h"
David Howells24c8dbb2006-08-22 20:06:10 -040056
57#define NFSDBG_FACILITY NFSDBG_CLIENT
58
David Howells24c8dbb2006-08-22 20:06:10 -040059static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
Bryan Schumakerab7017a2012-07-30 16:05:16 -040060static DEFINE_SPINLOCK(nfs_version_lock);
61static DEFINE_MUTEX(nfs_version_mutex);
62static LIST_HEAD(nfs_versions);
David Howells24c8dbb2006-08-22 20:06:10 -040063
64/*
David Howells5006a762006-08-22 20:06:12 -040065 * RPC cruft for NFS
66 */
Trond Myklebusta613fa12012-01-20 13:53:56 -050067static const struct rpc_version *nfs_version[5] = {
Bryan Schumakerab7017a2012-07-30 16:05:16 -040068 [2] = NULL,
69 [3] = NULL,
70 [4] = NULL,
David Howells5006a762006-08-22 20:06:12 -040071};
72
Trond Myklebusta613fa12012-01-20 13:53:56 -050073const struct rpc_program nfs_program = {
David Howells5006a762006-08-22 20:06:12 -040074 .name = "nfs",
75 .number = NFS_PROGRAM,
76 .nrvers = ARRAY_SIZE(nfs_version),
77 .version = nfs_version,
78 .stats = &nfs_rpcstat,
Jim Reesfe0a9b72011-07-30 20:52:42 -040079 .pipe_dir_name = NFS_PIPE_DIRNAME,
David Howells5006a762006-08-22 20:06:12 -040080};
81
82struct rpc_stat nfs_rpcstat = {
83 .program = &nfs_program
84};
85
Bryan Schumakerab7017a2012-07-30 16:05:16 -040086static struct nfs_subversion *find_nfs_version(unsigned int version)
87{
88 struct nfs_subversion *nfs;
89 spin_lock(&nfs_version_lock);
90
91 list_for_each_entry(nfs, &nfs_versions, list) {
92 if (nfs->rpc_ops->version == version) {
93 spin_unlock(&nfs_version_lock);
94 return nfs;
95 }
Yanchuan Nianee34e132012-09-10 08:40:16 +080096 }
Bryan Schumakerab7017a2012-07-30 16:05:16 -040097
98 spin_unlock(&nfs_version_lock);
Yanchuan Nianee34e132012-09-10 08:40:16 +080099 return ERR_PTR(-EPROTONOSUPPORT);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400100}
101
102struct nfs_subversion *get_nfs_version(unsigned int version)
103{
104 struct nfs_subversion *nfs = find_nfs_version(version);
105
106 if (IS_ERR(nfs)) {
107 mutex_lock(&nfs_version_mutex);
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400108 request_module("nfsv%d", version);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400109 nfs = find_nfs_version(version);
110 mutex_unlock(&nfs_version_mutex);
111 }
112
113 if (!IS_ERR(nfs))
114 try_module_get(nfs->owner);
115 return nfs;
116}
117
118void put_nfs_version(struct nfs_subversion *nfs)
119{
120 module_put(nfs->owner);
121}
122
123void register_nfs_version(struct nfs_subversion *nfs)
124{
125 spin_lock(&nfs_version_lock);
126
127 list_add(&nfs->list, &nfs_versions);
128 nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers;
129
130 spin_unlock(&nfs_version_lock);
131}
132EXPORT_SYMBOL_GPL(register_nfs_version);
133
134void unregister_nfs_version(struct nfs_subversion *nfs)
135{
136 spin_lock(&nfs_version_lock);
137
138 nfs_version[nfs->rpc_ops->version] = NULL;
139 list_del(&nfs->list);
140
141 spin_unlock(&nfs_version_lock);
142}
143EXPORT_SYMBOL_GPL(unregister_nfs_version);
144
145/*
David Howells24c8dbb2006-08-22 20:06:10 -0400146 * Allocate a shared client record
147 *
148 * Since these are allocated/deallocated very rarely, we don't
149 * bother putting them in a slab cache...
150 */
Bryan Schumaker6663ee72012-06-20 15:53:46 -0400151struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400152{
153 struct nfs_client *clp;
Trond Myklebust7c67db32008-04-07 20:50:11 -0400154 struct rpc_cred *cred;
Chuck Levera21bdd92009-06-17 18:02:10 -0700155 int err = -ENOMEM;
David Howells24c8dbb2006-08-22 20:06:10 -0400156
157 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
158 goto error_0;
159
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400160 clp->cl_nfs_mod = cl_init->nfs_mod;
161 try_module_get(clp->cl_nfs_mod->owner);
162
163 clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
Trond Myklebust40c553192007-12-14 14:56:07 -0500164
David Howells24c8dbb2006-08-22 20:06:10 -0400165 atomic_set(&clp->cl_count, 1);
166 clp->cl_cons_state = NFS_CS_INITING;
167
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500168 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
169 clp->cl_addrlen = cl_init->addrlen;
David Howells24c8dbb2006-08-22 20:06:10 -0400170
Trond Myklebust3a498022007-12-14 14:56:04 -0500171 if (cl_init->hostname) {
Chuck Levera21bdd92009-06-17 18:02:10 -0700172 err = -ENOMEM;
Trond Myklebust3a498022007-12-14 14:56:04 -0500173 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
David Howells24c8dbb2006-08-22 20:06:10 -0400174 if (!clp->cl_hostname)
Benny Halevy71468512009-04-01 09:22:56 -0400175 goto error_cleanup;
David Howells24c8dbb2006-08-22 20:06:10 -0400176 }
177
178 INIT_LIST_HEAD(&clp->cl_superblocks);
179 clp->cl_rpcclient = ERR_PTR(-EINVAL);
180
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500181 clp->cl_proto = cl_init->proto;
Chuck Lever73ea6662012-05-21 22:44:50 -0400182 clp->cl_net = get_net(cl_init->net);
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500183
Trond Myklebust68c97152012-01-03 13:22:46 -0500184 cred = rpc_lookup_machine_cred("*");
Trond Myklebust7c67db32008-04-07 20:50:11 -0400185 if (!IS_ERR(cred))
186 clp->cl_machine_cred = cred;
David Howells14727282009-04-03 16:42:42 +0100187 nfs_fscache_get_client_cookie(clp);
188
David Howells24c8dbb2006-08-22 20:06:10 -0400189 return clp;
190
Benny Halevy71468512009-04-01 09:22:56 -0400191error_cleanup:
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400192 put_nfs_version(clp->cl_nfs_mod);
David Howells24c8dbb2006-08-22 20:06:10 -0400193 kfree(clp);
194error_0:
Chuck Levera21bdd92009-06-17 18:02:10 -0700195 return ERR_PTR(err);
David Howells24c8dbb2006-08-22 20:06:10 -0400196}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400197EXPORT_SYMBOL_GPL(nfs_alloc_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400198
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400199#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000200void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000201{
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000202 struct nfs_net *nn = net_generic(net, nfs_net_id);
203
204 idr_destroy(&nn->cb_ident_idr);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000205}
206
207/* nfs_client_lock held */
208static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
209{
Chuck Lever73ea6662012-05-21 22:44:50 -0400210 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000211
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000212 if (clp->cl_cb_ident)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000213 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000214}
215
Fred Isamanf7e89172011-01-06 11:36:32 +0000216static void pnfs_init_server(struct nfs_server *server)
217{
218 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
219}
220
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800221#else
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000222void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000223{
224}
225
226static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
227{
228}
Fred Isamanf7e89172011-01-06 11:36:32 +0000229
230static void pnfs_init_server(struct nfs_server *server)
231{
232}
233
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800234#endif /* CONFIG_NFS_V4 */
235
236/*
David Howells24c8dbb2006-08-22 20:06:10 -0400237 * Destroy a shared client record
238 */
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400239void nfs_free_client(struct nfs_client *clp)
David Howells24c8dbb2006-08-22 20:06:10 -0400240{
Trond Myklebust40c553192007-12-14 14:56:07 -0500241 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400242
David Howells14727282009-04-03 16:42:42 +0100243 nfs_fscache_release_client_cookie(clp);
244
David Howells24c8dbb2006-08-22 20:06:10 -0400245 /* -EIO all pending I/O */
246 if (!IS_ERR(clp->cl_rpcclient))
247 rpc_shutdown_client(clp->cl_rpcclient);
248
Trond Myklebust7c67db32008-04-07 20:50:11 -0400249 if (clp->cl_machine_cred != NULL)
250 put_rpccred(clp->cl_machine_cred);
251
Chuck Lever73ea6662012-05-21 22:44:50 -0400252 put_net(clp->cl_net);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400253 put_nfs_version(clp->cl_nfs_mod);
David Howells24c8dbb2006-08-22 20:06:10 -0400254 kfree(clp->cl_hostname);
255 kfree(clp);
256
257 dprintk("<-- nfs_free_client()\n");
258}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400259EXPORT_SYMBOL_GPL(nfs_free_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400260
261/*
262 * Release a reference to a shared client record
263 */
264void nfs_put_client(struct nfs_client *clp)
265{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000266 struct nfs_net *nn;
267
David Howells27ba8512006-07-30 14:40:56 -0400268 if (!clp)
269 return;
270
David Howells24c8dbb2006-08-22 20:06:10 -0400271 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
Chuck Lever73ea6662012-05-21 22:44:50 -0400272 nn = net_generic(clp->cl_net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400273
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000274 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
David Howells24c8dbb2006-08-22 20:06:10 -0400275 list_del(&clp->cl_share_link);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000276 nfs_cb_idr_remove_locked(clp);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000277 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400278
Trond Myklebust1fea73a2012-10-15 11:24:57 -0400279 WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
David Howells24c8dbb2006-08-22 20:06:10 -0400280
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400281 clp->rpc_ops->free_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400282 }
283}
Andy Adamson16b374c2010-10-20 00:18:04 -0400284EXPORT_SYMBOL_GPL(nfs_put_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400285
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500286#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400287/*
288 * Test if two ip6 socket addresses refer to the same socket by
289 * comparing relevant fields. The padding bytes specifically, are not
290 * compared. sin6_flowinfo is not compared because it only affects QoS
291 * and sin6_scope_id is only compared if the address is "link local"
292 * because "link local" addresses need only be unique to a specific
293 * link. Conversely, ordinary unicast addresses might have different
294 * sin6_scope_id.
295 *
296 * The caller should ensure both socket addresses are AF_INET6.
297 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400298static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
299 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400300{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400301 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
302 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400303
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800304 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400305 return 0;
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800306 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
307 return sin1->sin6_scope_id == sin2->sin6_scope_id;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500308
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800309 return 1;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500310}
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400311#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
312static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
313 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400314{
315 return 0;
316}
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500317#endif
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500318
David Howells24c8dbb2006-08-22 20:06:10 -0400319/*
Ian Dalld7371c42009-03-10 20:33:22 -0400320 * Test if two ip4 socket addresses refer to the same socket, by
321 * comparing relevant fields. The padding bytes specifically, are
322 * not compared.
323 *
324 * The caller should ensure both socket addresses are AF_INET.
325 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400326static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
327 const struct sockaddr *sa2)
328{
329 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
330 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
331
332 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
333}
334
335static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
336 const struct sockaddr *sa2)
337{
338 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
339 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
340
341 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
342 (sin1->sin6_port == sin2->sin6_port);
343}
344
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400345static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
346 const struct sockaddr *sa2)
Ian Dalld7371c42009-03-10 20:33:22 -0400347{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400348 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
349 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400350
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400351 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
352 (sin1->sin_port == sin2->sin_port);
Ian Dalld7371c42009-03-10 20:33:22 -0400353}
354
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400355#if defined(CONFIG_NFS_V4_1)
Ian Dalld7371c42009-03-10 20:33:22 -0400356/*
Ian Dalld7371c42009-03-10 20:33:22 -0400357 * Test if two socket addresses represent the same actual socket,
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400358 * by comparing (only) relevant fields, excluding the port number.
359 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400360int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
361 const struct sockaddr *sa2)
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400362{
363 if (sa1->sa_family != sa2->sa_family)
364 return 0;
365
366 switch (sa1->sa_family) {
367 case AF_INET:
368 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
369 case AF_INET6:
370 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
371 }
372 return 0;
373}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400374EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr);
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400375#endif /* CONFIG_NFS_V4_1 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400376
377/*
378 * Test if two socket addresses represent the same actual socket,
379 * by comparing (only) relevant fields, including the port number.
Ian Dalld7371c42009-03-10 20:33:22 -0400380 */
381static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
382 const struct sockaddr *sa2)
383{
384 if (sa1->sa_family != sa2->sa_family)
385 return 0;
386
387 switch (sa1->sa_family) {
388 case AF_INET:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400389 return nfs_sockaddr_cmp_ip4(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400390 case AF_INET6:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400391 return nfs_sockaddr_cmp_ip6(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400392 }
393 return 0;
394}
395
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500396/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500397 * Find an nfs_client on the list that matches the initialisation data
398 * that is supplied.
399 */
400static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400401{
402 struct nfs_client *clp;
Ian Dalld7371c42009-03-10 20:33:22 -0400403 const struct sockaddr *sap = data->addr;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000404 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400405
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000406 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Ian Dalld7371c42009-03-10 20:33:22 -0400407 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebust13bbc062006-10-19 23:28:40 -0700408 /* Don't match clients that failed to initialise properly */
409 if (clp->cl_cons_state < 0)
410 continue;
411
David Howells24c8dbb2006-08-22 20:06:10 -0400412 /* Different NFS versions cannot share the same nfs_client */
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400413 if (clp->rpc_ops != data->nfs_mod->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400414 continue;
415
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500416 if (clp->cl_proto != data->proto)
417 continue;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400418 /* Match nfsv4 minorversion */
419 if (clp->cl_minorversion != data->minorversion)
420 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500421 /* Match the full socket address */
Ian Dalld7371c42009-03-10 20:33:22 -0400422 if (!nfs_sockaddr_cmp(sap, clap))
David Howells24c8dbb2006-08-22 20:06:10 -0400423 continue;
424
Trond Myklebustc81468a2007-12-14 14:56:05 -0500425 atomic_inc(&clp->cl_count);
426 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400427 }
David Howells24c8dbb2006-08-22 20:06:10 -0400428 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400429}
430
Trond Myklebust4697bd52012-05-23 13:24:36 -0400431static bool nfs_client_init_is_complete(const struct nfs_client *clp)
432{
433 return clp->cl_cons_state != NFS_CS_INITING;
434}
435
436int nfs_wait_client_init_complete(const struct nfs_client *clp)
437{
438 return wait_event_killable(nfs_client_active_wq,
439 nfs_client_init_is_complete(clp));
440}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400441EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400442
David Howells24c8dbb2006-08-22 20:06:10 -0400443/*
Chuck Leverf4117032012-05-21 22:45:50 -0400444 * Found an existing client. Make sure it's ready before returning.
445 */
446static struct nfs_client *
447nfs_found_client(const struct nfs_client_initdata *cl_init,
448 struct nfs_client *clp)
449{
450 int error;
451
Trond Myklebust4697bd52012-05-23 13:24:36 -0400452 error = nfs_wait_client_init_complete(clp);
Chuck Leverf4117032012-05-21 22:45:50 -0400453 if (error < 0) {
454 nfs_put_client(clp);
455 return ERR_PTR(-ERESTARTSYS);
456 }
457
458 if (clp->cl_cons_state < NFS_CS_READY) {
459 error = clp->cl_cons_state;
460 nfs_put_client(clp);
461 return ERR_PTR(error);
462 }
463
Trond Myklebust54ac4712012-05-23 13:26:10 -0400464 smp_rmb();
465
Chuck Leverf4117032012-05-21 22:45:50 -0400466 dprintk("<-- %s found nfs_client %p for %s\n",
467 __func__, clp, cl_init->hostname ?: "");
468 return clp;
469}
470
471/*
David Howells24c8dbb2006-08-22 20:06:10 -0400472 * Look up a client by IP address and protocol version
473 * - creates a new record if one doesn't yet exist
474 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400475struct nfs_client *
Andy Adamson45a52a02011-03-01 01:34:08 +0000476nfs_get_client(const struct nfs_client_initdata *cl_init,
477 const struct rpc_timeout *timeparms,
478 const char *ip_addr,
Chuck Lever4bf590e2012-05-21 22:46:07 -0400479 rpc_authflavor_t authflavour)
David Howells24c8dbb2006-08-22 20:06:10 -0400480{
481 struct nfs_client *clp, *new = NULL;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000482 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400483 const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
David Howells24c8dbb2006-08-22 20:06:10 -0400484
Chuck Leverd7422c42007-12-10 14:58:51 -0500485 dprintk("--> nfs_get_client(%s,v%u)\n",
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400486 cl_init->hostname ?: "", rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400487
488 /* see if the client already exists */
489 do {
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000490 spin_lock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400491
Trond Myklebustc81468a2007-12-14 14:56:05 -0500492 clp = nfs_match_client(cl_init);
Chuck Leverf4117032012-05-21 22:45:50 -0400493 if (clp) {
494 spin_unlock(&nn->nfs_client_lock);
495 if (new)
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400496 new->rpc_ops->free_client(new);
Chuck Leverf4117032012-05-21 22:45:50 -0400497 return nfs_found_client(cl_init, clp);
498 }
Chuck Lever8cab4c32012-05-21 22:45:59 -0400499 if (new) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400500 list_add_tail(&new->cl_share_link,
501 &nn->nfs_client_list);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400502 spin_unlock(&nn->nfs_client_lock);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400503 new->cl_flags = cl_init->init_flags;
Andy Adamsonf8407292013-07-24 11:59:49 -0400504 return rpc_ops->init_client(new, timeparms, ip_addr);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400505 }
David Howells24c8dbb2006-08-22 20:06:10 -0400506
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000507 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400508
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400509 new = rpc_ops->alloc_client(cl_init);
Chuck Levera21bdd92009-06-17 18:02:10 -0700510 } while (!IS_ERR(new));
David Howells24c8dbb2006-08-22 20:06:10 -0400511
Chuck Leverf4117032012-05-21 22:45:50 -0400512 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
513 cl_init->hostname ?: "", PTR_ERR(new));
Chuck Levera21bdd92009-06-17 18:02:10 -0700514 return new;
David Howells24c8dbb2006-08-22 20:06:10 -0400515}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400516EXPORT_SYMBOL_GPL(nfs_get_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400517
518/*
519 * Mark a server as ready or failed
520 */
Andy Adamson76db6d92009-04-01 09:22:38 -0400521void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400522{
Trond Myklebust54ac4712012-05-23 13:26:10 -0400523 smp_wmb();
David Howells24c8dbb2006-08-22 20:06:10 -0400524 clp->cl_cons_state = state;
525 wake_up_all(&nfs_client_active_wq);
526}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400527EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
David Howells5006a762006-08-22 20:06:12 -0400528
529/*
530 * Initialise the timeout values for a connection
531 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400532void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
David Howells5006a762006-08-22 20:06:12 -0400533 unsigned int timeo, unsigned int retrans)
534{
535 to->to_initval = timeo * HZ / 10;
536 to->to_retries = retrans;
David Howells5006a762006-08-22 20:06:12 -0400537
538 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400539 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400540 case XPRT_TRANSPORT_RDMA:
Trond Myklebust259875e2008-07-02 14:43:47 -0400541 if (to->to_retries == 0)
542 to->to_retries = NFS_DEF_TCP_RETRANS;
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500543 if (to->to_initval == 0)
Trond Myklebust259875e2008-07-02 14:43:47 -0400544 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400545 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
546 to->to_initval = NFS_MAX_TCP_TIMEOUT;
547 to->to_increment = to->to_initval;
548 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500549 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
550 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
551 if (to->to_maxval < to->to_initval)
552 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400553 to->to_exponential = 0;
554 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400555 case XPRT_TRANSPORT_UDP:
Trond Myklebust259875e2008-07-02 14:43:47 -0400556 if (to->to_retries == 0)
557 to->to_retries = NFS_DEF_UDP_RETRANS;
David Howells5006a762006-08-22 20:06:12 -0400558 if (!to->to_initval)
Trond Myklebust259875e2008-07-02 14:43:47 -0400559 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400560 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
561 to->to_initval = NFS_MAX_UDP_TIMEOUT;
562 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
563 to->to_exponential = 1;
564 break;
Trond Myklebust259875e2008-07-02 14:43:47 -0400565 default:
566 BUG();
David Howells5006a762006-08-22 20:06:12 -0400567 }
568}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400569EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
David Howells5006a762006-08-22 20:06:12 -0400570
571/*
572 * Create an RPC client handle
573 */
Bryan Schumaker428360d2012-07-16 16:39:17 -0400574int nfs_create_rpc_client(struct nfs_client *clp,
575 const struct rpc_timeout *timeparms,
576 rpc_authflavor_t flavor)
David Howells5006a762006-08-22 20:06:12 -0400577{
David Howells5006a762006-08-22 20:06:12 -0400578 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400579 struct rpc_create_args args = {
Chuck Lever73ea6662012-05-21 22:44:50 -0400580 .net = clp->cl_net,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500581 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400582 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500583 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500584 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400585 .servername = clp->cl_hostname,
586 .program = &nfs_program,
587 .version = clp->rpc_ops->version,
588 .authflavor = flavor,
589 };
David Howells5006a762006-08-22 20:06:12 -0400590
Chuck Lever4bf590e2012-05-21 22:46:07 -0400591 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500592 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
Trond Myklebust99875242013-09-24 12:06:07 -0400593 if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
594 args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
Chuck Lever4bf590e2012-05-21 22:46:07 -0400595 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500596 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
Trond Myklebust98f98cf2013-04-14 11:49:51 -0400597 if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
598 args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500599
David Howells5006a762006-08-22 20:06:12 -0400600 if (!IS_ERR(clp->cl_rpcclient))
601 return 0;
602
Chuck Lever41877d22006-08-22 20:06:20 -0400603 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400604 if (IS_ERR(clnt)) {
605 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700606 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400607 return PTR_ERR(clnt);
608 }
609
David Howells5006a762006-08-22 20:06:12 -0400610 clp->cl_rpcclient = clnt;
611 return 0;
612}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400613EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
David Howells54ceac42006-08-22 20:06:13 -0400614
615/*
616 * Version 2 or 3 client destruction
617 */
618static void nfs_destroy_server(struct nfs_server *server)
619{
NeilBrownf2596132012-12-13 15:14:36 +1100620 if (server->nlm_host)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500621 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400622}
623
624/*
625 * Version 2 or 3 lockd setup
626 */
627static int nfs_start_lockd(struct nfs_server *server)
628{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500629 struct nlm_host *host;
630 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500631 struct nlmclnt_initdata nlm_init = {
632 .hostname = clp->cl_hostname,
633 .address = (struct sockaddr *)&clp->cl_addr,
634 .addrlen = clp->cl_addrlen,
Chuck Lever883bb162008-01-15 16:04:20 -0500635 .nfs_version = clp->rpc_ops->version,
Chuck Lever0cb26592008-12-23 15:21:38 -0500636 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
637 1 : 0,
Chuck Lever73ea6662012-05-21 22:44:50 -0400638 .net = clp->cl_net,
Chuck Lever883bb162008-01-15 16:04:20 -0500639 };
David Howells54ceac42006-08-22 20:06:13 -0400640
Chuck Lever883bb162008-01-15 16:04:20 -0500641 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500642 return 0;
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 return 0;
646
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400647 switch (clp->cl_proto) {
648 default:
649 nlm_init.protocol = IPPROTO_TCP;
650 break;
651 case XPRT_TRANSPORT_UDP:
652 nlm_init.protocol = IPPROTO_UDP;
653 }
654
Chuck Lever883bb162008-01-15 16:04:20 -0500655 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500656 if (IS_ERR(host))
657 return PTR_ERR(host);
658
659 server->nlm_host = host;
660 server->destroy = nfs_destroy_server;
661 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400662}
663
664/*
David Howells54ceac42006-08-22 20:06:13 -0400665 * Create a general RPC client
666 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400667int nfs_init_server_rpcclient(struct nfs_server *server,
Trond Myklebust33170232007-12-20 16:03:59 -0500668 const struct rpc_timeout *timeo,
669 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400670{
671 struct nfs_client *clp = server->nfs_client;
672
Chuck Leverba9b5842012-09-14 17:24:02 -0400673 server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
674 pseudoflavour);
David Howells54ceac42006-08-22 20:06:13 -0400675 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700676 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400677 return PTR_ERR(server->client);
678 }
679
Trond Myklebust33170232007-12-20 16:03:59 -0500680 memcpy(&server->client->cl_timeout_default,
681 timeo,
682 sizeof(server->client->cl_timeout_default));
683 server->client->cl_timeout = &server->client->cl_timeout_default;
David Howells54ceac42006-08-22 20:06:13 -0400684 server->client->cl_softrtry = 0;
685 if (server->flags & NFS_MOUNT_SOFT)
686 server->client->cl_softrtry = 1;
687
David Howells54ceac42006-08-22 20:06:13 -0400688 return 0;
689}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400690EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
David Howells54ceac42006-08-22 20:06:13 -0400691
Chuck Lever8cab4c32012-05-21 22:45:59 -0400692/**
693 * nfs_init_client - Initialise an NFS2 or NFS3 client
694 *
695 * @clp: nfs_client to initialise
696 * @timeparms: timeout parameters for underlying RPC transport
697 * @ip_addr: IP presentation address (not used)
Chuck Lever8cab4c32012-05-21 22:45:59 -0400698 *
699 * Returns pointer to an NFS client, or an ERR_PTR value.
David Howells54ceac42006-08-22 20:06:13 -0400700 */
Chuck Lever8cab4c32012-05-21 22:45:59 -0400701struct nfs_client *nfs_init_client(struct nfs_client *clp,
702 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400703 const char *ip_addr)
David Howells54ceac42006-08-22 20:06:13 -0400704{
David Howells54ceac42006-08-22 20:06:13 -0400705 int error;
706
707 if (clp->cl_cons_state == NFS_CS_READY) {
708 /* the client is already initialised */
709 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400710 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400711 }
712
David Howells54ceac42006-08-22 20:06:13 -0400713 /*
714 * Create a client RPC handle for doing FSSTAT with UNIX auth only
715 * - RFC 2623, sec 2.3.2
716 */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400717 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400718 if (error < 0)
719 goto error;
720 nfs_mark_client_ready(clp, NFS_CS_READY);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400721 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400722
723error:
724 nfs_mark_client_ready(clp, error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400725 nfs_put_client(clp);
David Howells54ceac42006-08-22 20:06:13 -0400726 dprintk("<-- nfs_init_client() = xerror %d\n", error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400727 return ERR_PTR(error);
David Howells54ceac42006-08-22 20:06:13 -0400728}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400729EXPORT_SYMBOL_GPL(nfs_init_client);
David Howells54ceac42006-08-22 20:06:13 -0400730
731/*
732 * Create a version 2 or 3 client
733 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400734static int nfs_init_server(struct nfs_server *server,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400735 const struct nfs_parsed_mount_data *data,
736 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -0400737{
Trond Myklebust3a498022007-12-14 14:56:04 -0500738 struct nfs_client_initdata cl_init = {
739 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500740 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500741 .addrlen = data->nfs_server.addrlen,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400742 .nfs_mod = nfs_mod,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500743 .proto = data->nfs_server.protocol,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400744 .net = data->net,
Trond Myklebust3a498022007-12-14 14:56:04 -0500745 };
Trond Myklebust33170232007-12-20 16:03:59 -0500746 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400747 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500748 int error;
David Howells54ceac42006-08-22 20:06:13 -0400749
750 dprintk("--> nfs_init_server()\n");
751
Andy Adamson45a52a02011-03-01 01:34:08 +0000752 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
753 data->timeo, data->retrans);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400754 if (data->flags & NFS_MOUNT_NORESVPORT)
755 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
Andy Adamson45a52a02011-03-01 01:34:08 +0000756
David Howells54ceac42006-08-22 20:06:13 -0400757 /* Allocate or find a client reference we can use */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400758 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400759 if (IS_ERR(clp)) {
760 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
761 return PTR_ERR(clp);
762 }
763
David Howells54ceac42006-08-22 20:06:13 -0400764 server->nfs_client = clp;
765
766 /* Initialise the client representation from the mount data */
Trond Myklebustff3525a2008-08-15 16:59:14 -0400767 server->flags = data->flags;
David Howellsb797cac2009-04-03 16:42:48 +0100768 server->options = data->options;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400769 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
770 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400771 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR;
David Howells54ceac42006-08-22 20:06:13 -0400772
773 if (data->rsize)
774 server->rsize = nfs_block_size(data->rsize, NULL);
775 if (data->wsize)
776 server->wsize = nfs_block_size(data->wsize, NULL);
777
778 server->acregmin = data->acregmin * HZ;
779 server->acregmax = data->acregmax * HZ;
780 server->acdirmin = data->acdirmin * HZ;
781 server->acdirmax = data->acdirmax * HZ;
782
783 /* Start lockd here, before we might error out */
784 error = nfs_start_lockd(server);
785 if (error < 0)
786 goto error;
787
Chuck Leverf22d6d72008-03-14 14:10:22 -0400788 server->port = data->nfs_server.port;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400789 server->auth_info = data->auth_info;
Chuck Leverf22d6d72008-03-14 14:10:22 -0400790
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400791 error = nfs_init_server_rpcclient(server, &timeparms,
792 data->selected_flavor);
David Howells54ceac42006-08-22 20:06:13 -0400793 if (error < 0)
794 goto error;
795
Chuck Lever3f8400d2008-03-14 14:10:30 -0400796 /* Preserve the values of mount_server-related mount options */
797 if (data->mount_server.addrlen) {
798 memcpy(&server->mountd_address, &data->mount_server.address,
799 data->mount_server.addrlen);
800 server->mountd_addrlen = data->mount_server.addrlen;
801 }
802 server->mountd_version = data->mount_server.version;
803 server->mountd_port = data->mount_server.port;
804 server->mountd_protocol = data->mount_server.protocol;
805
David Howells54ceac42006-08-22 20:06:13 -0400806 server->namelen = data->namlen;
David Howells54ceac42006-08-22 20:06:13 -0400807 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
808 return 0;
809
810error:
811 server->nfs_client = NULL;
812 nfs_put_client(clp);
813 dprintk("<-- nfs_init_server() = xerror %d\n", error);
814 return error;
815}
816
817/*
818 * Load up the server record from information gained in an fsinfo record
819 */
Benny Halevy738fd0f32011-07-30 20:52:36 -0400820static void nfs_server_set_fsinfo(struct nfs_server *server,
821 struct nfs_fh *mntfh,
822 struct nfs_fsinfo *fsinfo)
David Howells54ceac42006-08-22 20:06:13 -0400823{
824 unsigned long max_rpc_payload;
825
826 /* Work out a lot of parameters */
827 if (server->rsize == 0)
828 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
829 if (server->wsize == 0)
830 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
831
832 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
833 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
834 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
835 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
836
837 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
838 if (server->rsize > max_rpc_payload)
839 server->rsize = max_rpc_payload;
840 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
841 server->rsize = NFS_MAX_FILE_IO_SIZE;
842 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700843
Jens Axboed9938312009-06-12 14:45:52 +0200844 server->backing_dev_info.name = "nfs";
David Howells54ceac42006-08-22 20:06:13 -0400845 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
846
847 if (server->wsize > max_rpc_payload)
848 server->wsize = max_rpc_payload;
849 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
850 server->wsize = NFS_MAX_FILE_IO_SIZE;
851 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400852
David Howells54ceac42006-08-22 20:06:13 -0400853 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
854
855 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -0400856 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
857 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
David Howells54ceac42006-08-22 20:06:13 -0400858 if (server->dtsize > server->rsize)
859 server->dtsize = server->rsize;
860
861 if (server->flags & NFS_MOUNT_NOAC) {
862 server->acregmin = server->acregmax = 0;
863 server->acdirmin = server->acdirmax = 0;
864 }
865
866 server->maxfilesize = fsinfo->maxfilesize;
867
Ricardo Labiaga6b967242010-10-12 16:30:05 -0700868 server->time_delta = fsinfo->time_delta;
869
David Howells54ceac42006-08-22 20:06:13 -0400870 /* We're airborne Set socket buffersize */
871 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
872}
873
874/*
875 * Probe filesystem information, including the FSID on v2/v3
876 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400877int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
David Howells54ceac42006-08-22 20:06:13 -0400878{
879 struct nfs_fsinfo fsinfo;
880 struct nfs_client *clp = server->nfs_client;
881 int error;
882
883 dprintk("--> nfs_probe_fsinfo()\n");
884
885 if (clp->rpc_ops->set_capabilities != NULL) {
886 error = clp->rpc_ops->set_capabilities(server, mntfh);
887 if (error < 0)
888 goto out_error;
889 }
890
891 fsinfo.fattr = fattr;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400892 fsinfo.layouttype = 0;
David Howells54ceac42006-08-22 20:06:13 -0400893 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
894 if (error < 0)
895 goto out_error;
896
Benny Halevy738fd0f32011-07-30 20:52:36 -0400897 nfs_server_set_fsinfo(server, mntfh, &fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400898
899 /* Get some general file system info */
900 if (server->namelen == 0) {
901 struct nfs_pathconf pathinfo;
902
903 pathinfo.fattr = fattr;
904 nfs_fattr_init(fattr);
905
906 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
907 server->namelen = pathinfo.max_namelen;
908 }
909
910 dprintk("<-- nfs_probe_fsinfo() = 0\n");
911 return 0;
912
913out_error:
914 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
915 return error;
916}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400917EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400918
919/*
920 * Copy useful information when duplicating a server record
921 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400922void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
David Howells54ceac42006-08-22 20:06:13 -0400923{
924 target->flags = source->flags;
Chuck Lever356e76b2010-04-22 15:35:56 -0400925 target->rsize = source->rsize;
926 target->wsize = source->wsize;
David Howells54ceac42006-08-22 20:06:13 -0400927 target->acregmin = source->acregmin;
928 target->acregmax = source->acregmax;
929 target->acdirmin = source->acdirmin;
930 target->acdirmax = source->acdirmax;
931 target->caps = source->caps;
David Howells2df54802009-09-23 14:36:39 -0400932 target->options = source->options;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400933 target->auth_info = source->auth_info;
David Howells54ceac42006-08-22 20:06:13 -0400934}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400935EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
David Howells54ceac42006-08-22 20:06:13 -0400936
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400937void nfs_server_insert_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000938{
939 struct nfs_client *clp = server->nfs_client;
Chuck Lever73ea6662012-05-21 22:44:50 -0400940 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Chuck Leverfca52382010-12-24 01:32:32 +0000941
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000942 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000943 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +0000944 list_add_tail(&server->master_link, &nn->nfs_volume_list);
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000945 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000946 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000947
948}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400949EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000950
Chuck Lever32e62b72013-10-17 14:12:28 -0400951void nfs_server_remove_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000952{
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000953 struct nfs_client *clp = server->nfs_client;
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500954 struct nfs_net *nn;
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000955
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500956 if (clp == NULL)
957 return;
Chuck Lever73ea6662012-05-21 22:44:50 -0400958 nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000959 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000960 list_del_rcu(&server->client_link);
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500961 if (list_empty(&clp->cl_superblocks))
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000962 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Chuck Leverfca52382010-12-24 01:32:32 +0000963 list_del(&server->master_link);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000964 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000965
966 synchronize_rcu();
967}
Chuck Lever32e62b72013-10-17 14:12:28 -0400968EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000969
David Howells54ceac42006-08-22 20:06:13 -0400970/*
971 * Allocate and initialise a server record
972 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400973struct nfs_server *nfs_alloc_server(void)
David Howells54ceac42006-08-22 20:06:13 -0400974{
975 struct nfs_server *server;
976
977 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
978 if (!server)
979 return NULL;
980
981 server->client = server->client_acl = ERR_PTR(-EINVAL);
982
983 /* Zero out the NFS state stuff */
984 INIT_LIST_HEAD(&server->client_link);
985 INIT_LIST_HEAD(&server->master_link);
Chuck Leverd3978bb2010-12-24 01:33:04 +0000986 INIT_LIST_HEAD(&server->delegations);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400987 INIT_LIST_HEAD(&server->layouts);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500988 INIT_LIST_HEAD(&server->state_owners_lru);
David Howells54ceac42006-08-22 20:06:13 -0400989
Steve Dicksonef818a22007-11-08 04:05:04 -0500990 atomic_set(&server->active, 0);
991
David Howells54ceac42006-08-22 20:06:13 -0400992 server->io_stats = nfs_alloc_iostats();
993 if (!server->io_stats) {
994 kfree(server);
995 return NULL;
996 }
997
Jens Axboe48d07642009-09-21 09:59:39 +0200998 if (bdi_init(&server->backing_dev_info)) {
999 nfs_free_iostats(server->io_stats);
1000 kfree(server);
1001 return NULL;
1002 }
1003
Trond Myklebust9157c312012-01-17 22:04:24 -05001004 ida_init(&server->openowner_id);
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001005 ida_init(&server->lockowner_id);
Fred Isamanf7e89172011-01-06 11:36:32 +00001006 pnfs_init_server(server);
1007
David Howells54ceac42006-08-22 20:06:13 -04001008 return server;
1009}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001010EXPORT_SYMBOL_GPL(nfs_alloc_server);
David Howells54ceac42006-08-22 20:06:13 -04001011
1012/*
1013 * Free up a server record
1014 */
1015void nfs_free_server(struct nfs_server *server)
1016{
1017 dprintk("--> nfs_free_server()\n");
1018
Chuck Leverfca52382010-12-24 01:32:32 +00001019 nfs_server_remove_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001020
1021 if (server->destroy != NULL)
1022 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -05001023
1024 if (!IS_ERR(server->client_acl))
1025 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -04001026 if (!IS_ERR(server->client))
1027 rpc_shutdown_client(server->client);
1028
1029 nfs_put_client(server->nfs_client);
1030
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001031 ida_destroy(&server->lockowner_id);
Trond Myklebust9157c312012-01-17 22:04:24 -05001032 ida_destroy(&server->openowner_id);
David Howells54ceac42006-08-22 20:06:13 -04001033 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -07001034 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -04001035 kfree(server);
1036 nfs_release_automount_timer();
1037 dprintk("<-- nfs_free_server()\n");
1038}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001039EXPORT_SYMBOL_GPL(nfs_free_server);
David Howells54ceac42006-08-22 20:06:13 -04001040
1041/*
1042 * Create a version 2 or 3 volume record
1043 * - keyed on server and FSID
1044 */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001045struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
Bryan Schumakerab7017a2012-07-30 16:05:16 -04001046 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -04001047{
1048 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001049 struct nfs_fattr *fattr;
David Howells54ceac42006-08-22 20:06:13 -04001050 int error;
1051
1052 server = nfs_alloc_server();
1053 if (!server)
1054 return ERR_PTR(-ENOMEM);
1055
Trond Myklebustfbca7792010-04-16 16:22:46 -04001056 error = -ENOMEM;
1057 fattr = nfs_alloc_fattr();
1058 if (fattr == NULL)
1059 goto error;
1060
David Howells54ceac42006-08-22 20:06:13 -04001061 /* Get a client representation */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001062 error = nfs_init_server(server, mount_info->parsed, nfs_mod);
David Howells54ceac42006-08-22 20:06:13 -04001063 if (error < 0)
1064 goto error;
1065
David Howells54ceac42006-08-22 20:06:13 -04001066 /* Probe the root fh to retrieve its FSID */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001067 error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001068 if (error < 0)
1069 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001070 if (server->nfs_client->rpc_ops->version == 3) {
1071 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1072 server->namelen = NFS3_MAXNAMLEN;
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001073 if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS))
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001074 server->caps |= NFS_CAP_READDIRPLUS;
1075 } else {
1076 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1077 server->namelen = NFS2_MAXNAMLEN;
1078 }
1079
Trond Myklebustfbca7792010-04-16 16:22:46 -04001080 if (!(fattr->valid & NFS_ATTR_FATTR)) {
David Quigley1775fd32013-05-22 12:50:42 -04001081 error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL);
David Howells54ceac42006-08-22 20:06:13 -04001082 if (error < 0) {
1083 dprintk("nfs_create_server: getattr error = %d\n", -error);
1084 goto error;
1085 }
1086 }
Trond Myklebustfbca7792010-04-16 16:22:46 -04001087 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
David Howells54ceac42006-08-22 20:06:13 -04001088
David Howells6daabf12006-08-24 15:44:16 -04001089 dprintk("Server FSID: %llx:%llx\n",
1090 (unsigned long long) server->fsid.major,
1091 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001092
Chuck Leverfca52382010-12-24 01:32:32 +00001093 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001094 server->mount_time = jiffies;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001095 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001096 return server;
1097
1098error:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001099 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001100 nfs_free_server(server);
1101 return ERR_PTR(error);
1102}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001103EXPORT_SYMBOL_GPL(nfs_create_server);
David Howells54ceac42006-08-22 20:06:13 -04001104
David Howells54ceac42006-08-22 20:06:13 -04001105/*
1106 * Clone an NFS2, NFS3 or NFS4 server record
1107 */
1108struct nfs_server *nfs_clone_server(struct nfs_server *source,
1109 struct nfs_fh *fh,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001110 struct nfs_fattr *fattr,
1111 rpc_authflavor_t flavor)
David Howells54ceac42006-08-22 20:06:13 -04001112{
1113 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001114 struct nfs_fattr *fattr_fsinfo;
David Howells54ceac42006-08-22 20:06:13 -04001115 int error;
1116
1117 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001118 (unsigned long long) fattr->fsid.major,
1119 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001120
1121 server = nfs_alloc_server();
1122 if (!server)
1123 return ERR_PTR(-ENOMEM);
1124
Trond Myklebustfbca7792010-04-16 16:22:46 -04001125 error = -ENOMEM;
1126 fattr_fsinfo = nfs_alloc_fattr();
1127 if (fattr_fsinfo == NULL)
1128 goto out_free_server;
1129
David Howells54ceac42006-08-22 20:06:13 -04001130 /* Copy data from the source */
1131 server->nfs_client = source->nfs_client;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001132 server->destroy = source->destroy;
David Howells54ceac42006-08-22 20:06:13 -04001133 atomic_inc(&server->nfs_client->cl_count);
1134 nfs_server_copy_userdata(server, source);
1135
1136 server->fsid = fattr->fsid;
1137
Trond Myklebust33170232007-12-20 16:03:59 -05001138 error = nfs_init_server_rpcclient(server,
1139 source->client->cl_timeout,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001140 flavor);
David Howells54ceac42006-08-22 20:06:13 -04001141 if (error < 0)
1142 goto out_free_server;
David Howells54ceac42006-08-22 20:06:13 -04001143
1144 /* probe the filesystem info for this server filesystem */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001145 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001146 if (error < 0)
1147 goto out_free_server;
1148
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001149 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1150 server->namelen = NFS4_MAXNAMLEN;
1151
David Howells54ceac42006-08-22 20:06:13 -04001152 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001153 (unsigned long long) server->fsid.major,
1154 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001155
1156 error = nfs_start_lockd(server);
1157 if (error < 0)
1158 goto out_free_server;
1159
Chuck Leverfca52382010-12-24 01:32:32 +00001160 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001161 server->mount_time = jiffies;
1162
Trond Myklebustfbca7792010-04-16 16:22:46 -04001163 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001164 dprintk("<-- nfs_clone_server() = %p\n", server);
1165 return server;
1166
1167out_free_server:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001168 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001169 nfs_free_server(server);
1170 dprintk("<-- nfs_clone_server() = error %d\n", error);
1171 return ERR_PTR(error);
1172}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001173EXPORT_SYMBOL_GPL(nfs_clone_server);
David Howells6aaca562006-08-22 20:06:13 -04001174
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001175void nfs_clients_init(struct net *net)
1176{
1177 struct nfs_net *nn = net_generic(net, nfs_net_id);
1178
1179 INIT_LIST_HEAD(&nn->nfs_client_list);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001180 INIT_LIST_HEAD(&nn->nfs_volume_list);
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001181#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001182 idr_init(&nn->cb_ident_idr);
1183#endif
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001184 spin_lock_init(&nn->nfs_client_lock);
Chuck Leverf0920752012-05-21 22:45:41 -04001185 nn->boot_time = CURRENT_TIME;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001186}
1187
David Howells6aaca562006-08-22 20:06:13 -04001188#ifdef CONFIG_PROC_FS
1189static struct proc_dir_entry *proc_fs_nfs;
1190
1191static int nfs_server_list_open(struct inode *inode, struct file *file);
1192static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1193static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1194static void nfs_server_list_stop(struct seq_file *p, void *v);
1195static int nfs_server_list_show(struct seq_file *m, void *v);
1196
James Morris88e9d342009-09-22 16:43:43 -07001197static const struct seq_operations nfs_server_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001198 .start = nfs_server_list_start,
1199 .next = nfs_server_list_next,
1200 .stop = nfs_server_list_stop,
1201 .show = nfs_server_list_show,
1202};
1203
Arjan van de Ven00977a52007-02-12 00:55:34 -08001204static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001205 .open = nfs_server_list_open,
1206 .read = seq_read,
1207 .llseek = seq_lseek,
1208 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001209 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001210};
1211
1212static int nfs_volume_list_open(struct inode *inode, struct file *file);
1213static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1214static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1215static void nfs_volume_list_stop(struct seq_file *p, void *v);
1216static int nfs_volume_list_show(struct seq_file *m, void *v);
1217
James Morris88e9d342009-09-22 16:43:43 -07001218static const struct seq_operations nfs_volume_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001219 .start = nfs_volume_list_start,
1220 .next = nfs_volume_list_next,
1221 .stop = nfs_volume_list_stop,
1222 .show = nfs_volume_list_show,
1223};
1224
Arjan van de Ven00977a52007-02-12 00:55:34 -08001225static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001226 .open = nfs_volume_list_open,
1227 .read = seq_read,
1228 .llseek = seq_lseek,
1229 .release = seq_release,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001230 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001231};
1232
1233/*
1234 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1235 * we're dealing
1236 */
1237static int nfs_server_list_open(struct inode *inode, struct file *file)
1238{
1239 struct seq_file *m;
1240 int ret;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001241 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1242 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
David Howells6aaca562006-08-22 20:06:13 -04001243
1244 ret = seq_open(file, &nfs_server_list_ops);
1245 if (ret < 0)
1246 return ret;
1247
1248 m = file->private_data;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001249 m->private = net;
David Howells6aaca562006-08-22 20:06:13 -04001250
1251 return 0;
1252}
1253
1254/*
1255 * set up the iterator to start reading from the server list and return the first item
1256 */
1257static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1258{
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001259 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1260
David Howells6aaca562006-08-22 20:06:13 -04001261 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001262 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001263 return seq_list_start_head(&nn->nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001264}
1265
1266/*
1267 * move to next server
1268 */
1269static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1270{
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001271 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1272
1273 return seq_list_next(v, &nn->nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001274}
1275
1276/*
1277 * clean up after reading from the transports list
1278 */
1279static void nfs_server_list_stop(struct seq_file *p, void *v)
1280{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001281 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1282
1283 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001284}
1285
1286/*
1287 * display a header line followed by a load of call lines
1288 */
1289static int nfs_server_list_show(struct seq_file *m, void *v)
1290{
1291 struct nfs_client *clp;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001292 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001293
1294 /* display header on line 1 */
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001295 if (v == &nn->nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001296 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1297 return 0;
1298 }
1299
1300 /* display one transport per line on subsequent lines */
1301 clp = list_entry(v, struct nfs_client, cl_share_link);
1302
Malahal Naineni940aab42011-09-20 17:27:14 -07001303 /* Check if the client is initialized */
1304 if (clp->cl_cons_state != NFS_CS_READY)
1305 return 0;
1306
Trond Myklebust2446ab62012-03-01 17:00:56 -05001307 rcu_read_lock();
Chuck Lever5d8515c2007-12-10 14:57:16 -05001308 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001309 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001310 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1311 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001312 atomic_read(&clp->cl_count),
1313 clp->cl_hostname);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001314 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001315
1316 return 0;
1317}
1318
1319/*
1320 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1321 */
1322static int nfs_volume_list_open(struct inode *inode, struct file *file)
1323{
1324 struct seq_file *m;
1325 int ret;
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001326 struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info;
1327 struct net *net = pid_ns->child_reaper->nsproxy->net_ns;
David Howells6aaca562006-08-22 20:06:13 -04001328
1329 ret = seq_open(file, &nfs_volume_list_ops);
1330 if (ret < 0)
1331 return ret;
1332
1333 m = file->private_data;
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001334 m->private = net;
David Howells6aaca562006-08-22 20:06:13 -04001335
1336 return 0;
1337}
1338
1339/*
1340 * set up the iterator to start reading from the volume list and return the first item
1341 */
1342static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1343{
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001344 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
1345
David Howells6aaca562006-08-22 20:06:13 -04001346 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001347 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001348 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001349}
1350
1351/*
1352 * move to next volume
1353 */
1354static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1355{
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001356 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1357
1358 return seq_list_next(v, &nn->nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001359}
1360
1361/*
1362 * clean up after reading from the transports list
1363 */
1364static void nfs_volume_list_stop(struct seq_file *p, void *v)
1365{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001366 struct nfs_net *nn = net_generic(p->private, nfs_net_id);
1367
1368 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001369}
1370
1371/*
1372 * display a header line followed by a load of call lines
1373 */
1374static int nfs_volume_list_show(struct seq_file *m, void *v)
1375{
1376 struct nfs_server *server;
1377 struct nfs_client *clp;
1378 char dev[8], fsid[17];
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001379 struct nfs_net *nn = net_generic(m->private, nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001380
1381 /* display header on line 1 */
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001382 if (v == &nn->nfs_volume_list) {
David Howells5d1acff2009-04-03 16:42:47 +01001383 seq_puts(m, "NV SERVER PORT DEV FSID FSC\n");
David Howells6aaca562006-08-22 20:06:13 -04001384 return 0;
1385 }
1386 /* display one transport per line on subsequent lines */
1387 server = list_entry(v, struct nfs_server, master_link);
1388 clp = server->nfs_client;
1389
1390 snprintf(dev, 8, "%u:%u",
1391 MAJOR(server->s_dev), MINOR(server->s_dev));
1392
1393 snprintf(fsid, 17, "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04001394 (unsigned long long) server->fsid.major,
1395 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04001396
Trond Myklebust2446ab62012-03-01 17:00:56 -05001397 rcu_read_lock();
David Howells5d1acff2009-04-03 16:42:47 +01001398 seq_printf(m, "v%u %s %s %-7s %-17s %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001399 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001400 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1401 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001402 dev,
David Howells5d1acff2009-04-03 16:42:47 +01001403 fsid,
1404 nfs_server_fscache_state(server));
Trond Myklebust2446ab62012-03-01 17:00:56 -05001405 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001406
1407 return 0;
1408}
1409
1410/*
1411 * initialise the /proc/fs/nfsfs/ directory
1412 */
1413int __init nfs_fs_proc_init(void)
1414{
1415 struct proc_dir_entry *p;
1416
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001417 proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001418 if (!proc_fs_nfs)
1419 goto error_0;
1420
David Howells6aaca562006-08-22 20:06:13 -04001421 /* a file of servers with which we're dealing */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001422 p = proc_create("servers", S_IFREG|S_IRUGO,
1423 proc_fs_nfs, &nfs_server_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001424 if (!p)
1425 goto error_1;
1426
David Howells6aaca562006-08-22 20:06:13 -04001427 /* a file of volumes that we have mounted */
Denis V. Lunev34b37232008-04-29 01:02:07 -07001428 p = proc_create("volumes", S_IFREG|S_IRUGO,
1429 proc_fs_nfs, &nfs_volume_list_fops);
David Howells6aaca562006-08-22 20:06:13 -04001430 if (!p)
1431 goto error_2;
David Howells6aaca562006-08-22 20:06:13 -04001432 return 0;
1433
1434error_2:
1435 remove_proc_entry("servers", proc_fs_nfs);
1436error_1:
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001437 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001438error_0:
1439 return -ENOMEM;
1440}
1441
1442/*
1443 * clean up the /proc/fs/nfsfs/ directory
1444 */
1445void nfs_fs_proc_exit(void)
1446{
1447 remove_proc_entry("volumes", proc_fs_nfs);
1448 remove_proc_entry("servers", proc_fs_nfs);
Alexey Dobriyan36a5aeb2008-04-29 01:01:42 -07001449 remove_proc_entry("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001450}
1451
1452#endif /* CONFIG_PROC_FS */