blob: ecebb406cc1aec554ce780f2c3680eddc351e8da [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>
David Howells24c8dbb2006-08-22 20:06:10 -040034#include <linux/vfs.h>
35#include <linux/inet.h>
Trond Myklebust3b0d3f92008-01-03 13:28:58 -050036#include <linux/in6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Al Viro40401532012-02-13 03:58:52 +000038#include <linux/idr.h>
Trond Myklebust3b0d3f92008-01-03 13:28:58 -050039#include <net/ipv6.h>
David Howells24c8dbb2006-08-22 20:06:10 -040040#include <linux/nfs_xdr.h>
Andy Adamson0b5b7ae2009-04-01 09:23:15 -040041#include <linux/sunrpc/bc_xprt.h>
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +000042#include <linux/nsproxy.h>
43#include <linux/pid_namespace.h>
David Howells24c8dbb2006-08-22 20:06:10 -040044
David Howells24c8dbb2006-08-22 20:06:10 -040045
46#include "nfs4_fs.h"
47#include "callback.h"
48#include "delegation.h"
49#include "iostat.h"
50#include "internal.h"
David Howells14727282009-04-03 16:42:42 +010051#include "fscache.h"
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040052#include "pnfs.h"
Bryan Schumakerab7017a2012-07-30 16:05:16 -040053#include "nfs.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);
Bryan Schumakerab7017a2012-07-30 16:05:16 -040059static DEFINE_SPINLOCK(nfs_version_lock);
60static DEFINE_MUTEX(nfs_version_mutex);
61static LIST_HEAD(nfs_versions);
David Howells24c8dbb2006-08-22 20:06:10 -040062
63/*
David Howells5006a762006-08-22 20:06:12 -040064 * RPC cruft for NFS
65 */
Trond Myklebusta613fa12012-01-20 13:53:56 -050066static const struct rpc_version *nfs_version[5] = {
Bryan Schumakerab7017a2012-07-30 16:05:16 -040067 [2] = NULL,
68 [3] = NULL,
69 [4] = NULL,
David Howells5006a762006-08-22 20:06:12 -040070};
71
Trond Myklebusta613fa12012-01-20 13:53:56 -050072const struct rpc_program nfs_program = {
David Howells5006a762006-08-22 20:06:12 -040073 .name = "nfs",
74 .number = NFS_PROGRAM,
75 .nrvers = ARRAY_SIZE(nfs_version),
76 .version = nfs_version,
77 .stats = &nfs_rpcstat,
Jim Reesfe0a9b72011-07-30 20:52:42 -040078 .pipe_dir_name = NFS_PIPE_DIRNAME,
David Howells5006a762006-08-22 20:06:12 -040079};
80
81struct rpc_stat nfs_rpcstat = {
82 .program = &nfs_program
83};
84
Bryan Schumakerab7017a2012-07-30 16:05:16 -040085static struct nfs_subversion *find_nfs_version(unsigned int version)
86{
87 struct nfs_subversion *nfs;
88 spin_lock(&nfs_version_lock);
89
90 list_for_each_entry(nfs, &nfs_versions, list) {
91 if (nfs->rpc_ops->version == version) {
92 spin_unlock(&nfs_version_lock);
93 return nfs;
94 }
Yanchuan Nianee34e132012-09-10 08:40:16 +080095 }
Bryan Schumakerab7017a2012-07-30 16:05:16 -040096
97 spin_unlock(&nfs_version_lock);
Yanchuan Nianee34e132012-09-10 08:40:16 +080098 return ERR_PTR(-EPROTONOSUPPORT);
Bryan Schumakerab7017a2012-07-30 16:05:16 -040099}
100
101struct nfs_subversion *get_nfs_version(unsigned int version)
102{
103 struct nfs_subversion *nfs = find_nfs_version(version);
104
105 if (IS_ERR(nfs)) {
106 mutex_lock(&nfs_version_mutex);
bjschuma@gmail.com1ae811e2012-08-08 13:57:06 -0400107 request_module("nfsv%d", version);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400108 nfs = find_nfs_version(version);
109 mutex_unlock(&nfs_version_mutex);
110 }
111
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400112 if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
113 return ERR_PTR(-EAGAIN);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400114 return nfs;
115}
116
117void put_nfs_version(struct nfs_subversion *nfs)
118{
119 module_put(nfs->owner);
120}
121
122void register_nfs_version(struct nfs_subversion *nfs)
123{
124 spin_lock(&nfs_version_lock);
125
126 list_add(&nfs->list, &nfs_versions);
127 nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers;
128
129 spin_unlock(&nfs_version_lock);
130}
131EXPORT_SYMBOL_GPL(register_nfs_version);
132
133void unregister_nfs_version(struct nfs_subversion *nfs)
134{
135 spin_lock(&nfs_version_lock);
136
137 nfs_version[nfs->rpc_ops->version] = NULL;
138 list_del(&nfs->list);
139
140 spin_unlock(&nfs_version_lock);
141}
142EXPORT_SYMBOL_GPL(unregister_nfs_version);
143
144/*
David Howells24c8dbb2006-08-22 20:06:10 -0400145 * Allocate a shared client record
146 *
147 * Since these are allocated/deallocated very rarely, we don't
148 * bother putting them in a slab cache...
149 */
Bryan Schumaker6663ee72012-06-20 15:53:46 -0400150struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
David Howells24c8dbb2006-08-22 20:06:10 -0400151{
152 struct nfs_client *clp;
Trond Myklebust7c67db32008-04-07 20:50:11 -0400153 struct rpc_cred *cred;
Chuck Levera21bdd92009-06-17 18:02:10 -0700154 int err = -ENOMEM;
David Howells24c8dbb2006-08-22 20:06:10 -0400155
156 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
157 goto error_0;
158
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400159 clp->cl_nfs_mod = cl_init->nfs_mod;
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400160 if (!try_module_get(clp->cl_nfs_mod->owner))
161 goto error_dealloc;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400162
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);
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400193error_dealloc:
David Howells24c8dbb2006-08-22 20:06:10 -0400194 kfree(clp);
195error_0:
Chuck Levera21bdd92009-06-17 18:02:10 -0700196 return ERR_PTR(err);
David Howells24c8dbb2006-08-22 20:06:10 -0400197}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400198EXPORT_SYMBOL_GPL(nfs_alloc_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400199
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400200#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000201void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000202{
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000203 struct nfs_net *nn = net_generic(net, nfs_net_id);
204
205 idr_destroy(&nn->cb_ident_idr);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000206}
207
208/* nfs_client_lock held */
209static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
210{
Chuck Lever73ea6662012-05-21 22:44:50 -0400211 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000212
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000213 if (clp->cl_cb_ident)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000214 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000215}
216
Fred Isamanf7e89172011-01-06 11:36:32 +0000217static void pnfs_init_server(struct nfs_server *server)
218{
219 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
220}
221
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800222#else
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000223void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000224{
225}
226
227static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
228{
229}
Fred Isamanf7e89172011-01-06 11:36:32 +0000230
231static void pnfs_init_server(struct nfs_server *server)
232{
233}
234
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800235#endif /* CONFIG_NFS_V4 */
236
237/*
David Howells24c8dbb2006-08-22 20:06:10 -0400238 * Destroy a shared client record
239 */
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400240void nfs_free_client(struct nfs_client *clp)
David Howells24c8dbb2006-08-22 20:06:10 -0400241{
Trond Myklebust40c553192007-12-14 14:56:07 -0500242 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400243
David Howells14727282009-04-03 16:42:42 +0100244 nfs_fscache_release_client_cookie(clp);
245
David Howells24c8dbb2006-08-22 20:06:10 -0400246 /* -EIO all pending I/O */
247 if (!IS_ERR(clp->cl_rpcclient))
248 rpc_shutdown_client(clp->cl_rpcclient);
249
Trond Myklebust7c67db32008-04-07 20:50:11 -0400250 if (clp->cl_machine_cred != NULL)
251 put_rpccred(clp->cl_machine_cred);
252
Chuck Lever73ea6662012-05-21 22:44:50 -0400253 put_net(clp->cl_net);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400254 put_nfs_version(clp->cl_nfs_mod);
David Howells24c8dbb2006-08-22 20:06:10 -0400255 kfree(clp->cl_hostname);
Jeff Laytonf11b2a12014-06-21 20:52:17 -0400256 kfree(clp->cl_acceptor);
David Howells24c8dbb2006-08-22 20:06:10 -0400257 kfree(clp);
258
259 dprintk("<-- nfs_free_client()\n");
260}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400261EXPORT_SYMBOL_GPL(nfs_free_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400262
263/*
264 * Release a reference to a shared client record
265 */
266void nfs_put_client(struct nfs_client *clp)
267{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000268 struct nfs_net *nn;
269
David Howells27ba8512006-07-30 14:40:56 -0400270 if (!clp)
271 return;
272
David Howells24c8dbb2006-08-22 20:06:10 -0400273 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
Chuck Lever73ea6662012-05-21 22:44:50 -0400274 nn = net_generic(clp->cl_net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400275
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000276 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
David Howells24c8dbb2006-08-22 20:06:10 -0400277 list_del(&clp->cl_share_link);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000278 nfs_cb_idr_remove_locked(clp);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000279 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400280
Trond Myklebust1fea73a2012-10-15 11:24:57 -0400281 WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
David Howells24c8dbb2006-08-22 20:06:10 -0400282
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400283 clp->rpc_ops->free_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400284 }
285}
Andy Adamson16b374c2010-10-20 00:18:04 -0400286EXPORT_SYMBOL_GPL(nfs_put_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400287
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500288#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400289/*
290 * Test if two ip6 socket addresses refer to the same socket by
291 * comparing relevant fields. The padding bytes specifically, are not
292 * compared. sin6_flowinfo is not compared because it only affects QoS
293 * and sin6_scope_id is only compared if the address is "link local"
294 * because "link local" addresses need only be unique to a specific
295 * link. Conversely, ordinary unicast addresses might have different
296 * sin6_scope_id.
297 *
298 * The caller should ensure both socket addresses are AF_INET6.
299 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400300static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
301 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400302{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400303 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
304 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400305
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800306 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400307 return 0;
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800308 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
309 return sin1->sin6_scope_id == sin2->sin6_scope_id;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500310
Mi Jinlongb9dd3ab2011-10-12 15:09:34 +0800311 return 1;
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500312}
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400313#else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */
314static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1,
315 const struct sockaddr *sa2)
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400316{
317 return 0;
318}
Trond Myklebust9082a5c2008-12-23 15:21:53 -0500319#endif
Trond Myklebust3b0d3f92008-01-03 13:28:58 -0500320
David Howells24c8dbb2006-08-22 20:06:10 -0400321/*
Ian Dalld7371c42009-03-10 20:33:22 -0400322 * Test if two ip4 socket addresses refer to the same socket, by
323 * comparing relevant fields. The padding bytes specifically, are
324 * not compared.
325 *
326 * The caller should ensure both socket addresses are AF_INET.
327 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400328static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1,
329 const struct sockaddr *sa2)
330{
331 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
332 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
333
334 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
335}
336
337static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1,
338 const struct sockaddr *sa2)
339{
340 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
341 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
342
343 return nfs_sockaddr_match_ipaddr6(sa1, sa2) &&
344 (sin1->sin6_port == sin2->sin6_port);
345}
346
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400347static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1,
348 const struct sockaddr *sa2)
Ian Dalld7371c42009-03-10 20:33:22 -0400349{
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400350 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
351 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400352
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400353 return nfs_sockaddr_match_ipaddr4(sa1, sa2) &&
354 (sin1->sin_port == sin2->sin_port);
Ian Dalld7371c42009-03-10 20:33:22 -0400355}
356
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400357#if defined(CONFIG_NFS_V4_1)
Ian Dalld7371c42009-03-10 20:33:22 -0400358/*
Ian Dalld7371c42009-03-10 20:33:22 -0400359 * Test if two socket addresses represent the same actual socket,
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400360 * by comparing (only) relevant fields, excluding the port number.
361 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400362int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1,
363 const struct sockaddr *sa2)
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400364{
365 if (sa1->sa_family != sa2->sa_family)
366 return 0;
367
368 switch (sa1->sa_family) {
369 case AF_INET:
370 return nfs_sockaddr_match_ipaddr4(sa1, sa2);
371 case AF_INET6:
372 return nfs_sockaddr_match_ipaddr6(sa1, sa2);
373 }
374 return 0;
375}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400376EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr);
Bryan Schumaker4b7c8dd2012-03-12 11:28:24 -0400377#endif /* CONFIG_NFS_V4_1 */
Chuck Lever3c8c45d2009-03-18 20:48:14 -0400378
379/*
380 * Test if two socket addresses represent the same actual socket,
381 * by comparing (only) relevant fields, including the port number.
Ian Dalld7371c42009-03-10 20:33:22 -0400382 */
383static int nfs_sockaddr_cmp(const struct sockaddr *sa1,
384 const struct sockaddr *sa2)
385{
386 if (sa1->sa_family != sa2->sa_family)
387 return 0;
388
389 switch (sa1->sa_family) {
390 case AF_INET:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400391 return nfs_sockaddr_cmp_ip4(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400392 case AF_INET6:
Trond Myklebust9f4c8992009-03-12 14:51:32 -0400393 return nfs_sockaddr_cmp_ip6(sa1, sa2);
Ian Dalld7371c42009-03-10 20:33:22 -0400394 }
395 return 0;
396}
397
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500398/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500399 * Find an nfs_client on the list that matches the initialisation data
400 * that is supplied.
401 */
402static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400403{
404 struct nfs_client *clp;
Ian Dalld7371c42009-03-10 20:33:22 -0400405 const struct sockaddr *sap = data->addr;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000406 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400407
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000408 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Ian Dalld7371c42009-03-10 20:33:22 -0400409 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebust13bbc062006-10-19 23:28:40 -0700410 /* Don't match clients that failed to initialise properly */
411 if (clp->cl_cons_state < 0)
412 continue;
413
David Howells24c8dbb2006-08-22 20:06:10 -0400414 /* Different NFS versions cannot share the same nfs_client */
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400415 if (clp->rpc_ops != data->nfs_mod->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400416 continue;
417
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500418 if (clp->cl_proto != data->proto)
419 continue;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400420 /* Match nfsv4 minorversion */
421 if (clp->cl_minorversion != data->minorversion)
422 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500423 /* Match the full socket address */
Ian Dalld7371c42009-03-10 20:33:22 -0400424 if (!nfs_sockaddr_cmp(sap, clap))
David Howells24c8dbb2006-08-22 20:06:10 -0400425 continue;
426
Trond Myklebustc81468a2007-12-14 14:56:05 -0500427 atomic_inc(&clp->cl_count);
428 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400429 }
David Howells24c8dbb2006-08-22 20:06:10 -0400430 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400431}
432
Trond Myklebust4697bd52012-05-23 13:24:36 -0400433static bool nfs_client_init_is_complete(const struct nfs_client *clp)
434{
Trond Myklebust48d66b92015-03-03 20:28:59 -0500435 return clp->cl_cons_state <= NFS_CS_READY;
Trond Myklebust4697bd52012-05-23 13:24:36 -0400436}
437
438int nfs_wait_client_init_complete(const struct nfs_client *clp)
439{
440 return wait_event_killable(nfs_client_active_wq,
441 nfs_client_init_is_complete(clp));
442}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400443EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400444
David Howells24c8dbb2006-08-22 20:06:10 -0400445/*
Chuck Leverf4117032012-05-21 22:45:50 -0400446 * Found an existing client. Make sure it's ready before returning.
447 */
448static struct nfs_client *
449nfs_found_client(const struct nfs_client_initdata *cl_init,
450 struct nfs_client *clp)
451{
452 int error;
453
Trond Myklebust4697bd52012-05-23 13:24:36 -0400454 error = nfs_wait_client_init_complete(clp);
Chuck Leverf4117032012-05-21 22:45:50 -0400455 if (error < 0) {
456 nfs_put_client(clp);
457 return ERR_PTR(-ERESTARTSYS);
458 }
459
460 if (clp->cl_cons_state < NFS_CS_READY) {
461 error = clp->cl_cons_state;
462 nfs_put_client(clp);
463 return ERR_PTR(error);
464 }
465
Trond Myklebust54ac4712012-05-23 13:26:10 -0400466 smp_rmb();
467
Chuck Leverf4117032012-05-21 22:45:50 -0400468 dprintk("<-- %s found nfs_client %p for %s\n",
469 __func__, clp, cl_init->hostname ?: "");
470 return clp;
471}
472
473/*
David Howells24c8dbb2006-08-22 20:06:10 -0400474 * Look up a client by IP address and protocol version
475 * - creates a new record if one doesn't yet exist
476 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400477struct nfs_client *
Andy Adamson45a52a02011-03-01 01:34:08 +0000478nfs_get_client(const struct nfs_client_initdata *cl_init,
479 const struct rpc_timeout *timeparms,
480 const char *ip_addr,
Chuck Lever4bf590e2012-05-21 22:46:07 -0400481 rpc_authflavor_t authflavour)
David Howells24c8dbb2006-08-22 20:06:10 -0400482{
483 struct nfs_client *clp, *new = NULL;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000484 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400485 const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
David Howells24c8dbb2006-08-22 20:06:10 -0400486
Peng Tao31434f42014-07-08 11:45:48 +0800487 if (cl_init->hostname == NULL) {
488 WARN_ON(1);
489 return NULL;
490 }
491
Chuck Leverd7422c42007-12-10 14:58:51 -0500492 dprintk("--> nfs_get_client(%s,v%u)\n",
Peng Tao31434f42014-07-08 11:45:48 +0800493 cl_init->hostname, rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400494
495 /* see if the client already exists */
496 do {
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000497 spin_lock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400498
Trond Myklebustc81468a2007-12-14 14:56:05 -0500499 clp = nfs_match_client(cl_init);
Chuck Leverf4117032012-05-21 22:45:50 -0400500 if (clp) {
501 spin_unlock(&nn->nfs_client_lock);
502 if (new)
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400503 new->rpc_ops->free_client(new);
Chuck Leverf4117032012-05-21 22:45:50 -0400504 return nfs_found_client(cl_init, clp);
505 }
Chuck Lever8cab4c32012-05-21 22:45:59 -0400506 if (new) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400507 list_add_tail(&new->cl_share_link,
508 &nn->nfs_client_list);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400509 spin_unlock(&nn->nfs_client_lock);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400510 new->cl_flags = cl_init->init_flags;
Andy Adamsonf8407292013-07-24 11:59:49 -0400511 return rpc_ops->init_client(new, timeparms, ip_addr);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400512 }
David Howells24c8dbb2006-08-22 20:06:10 -0400513
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000514 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400515
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400516 new = rpc_ops->alloc_client(cl_init);
Chuck Levera21bdd92009-06-17 18:02:10 -0700517 } while (!IS_ERR(new));
David Howells24c8dbb2006-08-22 20:06:10 -0400518
Chuck Leverf4117032012-05-21 22:45:50 -0400519 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
Peng Tao31434f42014-07-08 11:45:48 +0800520 cl_init->hostname, PTR_ERR(new));
Chuck Levera21bdd92009-06-17 18:02:10 -0700521 return new;
David Howells24c8dbb2006-08-22 20:06:10 -0400522}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400523EXPORT_SYMBOL_GPL(nfs_get_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400524
525/*
526 * Mark a server as ready or failed
527 */
Andy Adamson76db6d92009-04-01 09:22:38 -0400528void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400529{
Trond Myklebust54ac4712012-05-23 13:26:10 -0400530 smp_wmb();
David Howells24c8dbb2006-08-22 20:06:10 -0400531 clp->cl_cons_state = state;
532 wake_up_all(&nfs_client_active_wq);
533}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400534EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
David Howells5006a762006-08-22 20:06:12 -0400535
536/*
537 * Initialise the timeout values for a connection
538 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400539void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
David Howells5006a762006-08-22 20:06:12 -0400540 unsigned int timeo, unsigned int retrans)
541{
542 to->to_initval = timeo * HZ / 10;
543 to->to_retries = retrans;
David Howells5006a762006-08-22 20:06:12 -0400544
545 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400546 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400547 case XPRT_TRANSPORT_RDMA:
Trond Myklebust259875e2008-07-02 14:43:47 -0400548 if (to->to_retries == 0)
549 to->to_retries = NFS_DEF_TCP_RETRANS;
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500550 if (to->to_initval == 0)
Trond Myklebust259875e2008-07-02 14:43:47 -0400551 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400552 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
553 to->to_initval = NFS_MAX_TCP_TIMEOUT;
554 to->to_increment = to->to_initval;
555 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500556 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
557 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
558 if (to->to_maxval < to->to_initval)
559 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400560 to->to_exponential = 0;
561 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400562 case XPRT_TRANSPORT_UDP:
Trond Myklebust259875e2008-07-02 14:43:47 -0400563 if (to->to_retries == 0)
564 to->to_retries = NFS_DEF_UDP_RETRANS;
David Howells5006a762006-08-22 20:06:12 -0400565 if (!to->to_initval)
Trond Myklebust259875e2008-07-02 14:43:47 -0400566 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400567 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
568 to->to_initval = NFS_MAX_UDP_TIMEOUT;
569 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
570 to->to_exponential = 1;
571 break;
Trond Myklebust259875e2008-07-02 14:43:47 -0400572 default:
573 BUG();
David Howells5006a762006-08-22 20:06:12 -0400574 }
575}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400576EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
David Howells5006a762006-08-22 20:06:12 -0400577
578/*
579 * Create an RPC client handle
580 */
Bryan Schumaker428360d2012-07-16 16:39:17 -0400581int nfs_create_rpc_client(struct nfs_client *clp,
582 const struct rpc_timeout *timeparms,
583 rpc_authflavor_t flavor)
David Howells5006a762006-08-22 20:06:12 -0400584{
David Howells5006a762006-08-22 20:06:12 -0400585 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400586 struct rpc_create_args args = {
Chuck Lever73ea6662012-05-21 22:44:50 -0400587 .net = clp->cl_net,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500588 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400589 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500590 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500591 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400592 .servername = clp->cl_hostname,
593 .program = &nfs_program,
594 .version = clp->rpc_ops->version,
595 .authflavor = flavor,
596 };
David Howells5006a762006-08-22 20:06:12 -0400597
Chuck Lever4bf590e2012-05-21 22:46:07 -0400598 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500599 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
Trond Myklebust99875242013-09-24 12:06:07 -0400600 if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
601 args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
Chuck Lever4bf590e2012-05-21 22:46:07 -0400602 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500603 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
Trond Myklebust98f98cf2013-04-14 11:49:51 -0400604 if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
605 args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500606
David Howells5006a762006-08-22 20:06:12 -0400607 if (!IS_ERR(clp->cl_rpcclient))
608 return 0;
609
Chuck Lever41877d22006-08-22 20:06:20 -0400610 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400611 if (IS_ERR(clnt)) {
612 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700613 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400614 return PTR_ERR(clnt);
615 }
616
David Howells5006a762006-08-22 20:06:12 -0400617 clp->cl_rpcclient = clnt;
618 return 0;
619}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400620EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
David Howells54ceac42006-08-22 20:06:13 -0400621
622/*
623 * Version 2 or 3 client destruction
624 */
625static void nfs_destroy_server(struct nfs_server *server)
626{
NeilBrownf2596132012-12-13 15:14:36 +1100627 if (server->nlm_host)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500628 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400629}
630
631/*
632 * Version 2 or 3 lockd setup
633 */
634static int nfs_start_lockd(struct nfs_server *server)
635{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500636 struct nlm_host *host;
637 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500638 struct nlmclnt_initdata nlm_init = {
639 .hostname = clp->cl_hostname,
640 .address = (struct sockaddr *)&clp->cl_addr,
641 .addrlen = clp->cl_addrlen,
Chuck Lever883bb162008-01-15 16:04:20 -0500642 .nfs_version = clp->rpc_ops->version,
Chuck Lever0cb26592008-12-23 15:21:38 -0500643 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
644 1 : 0,
Chuck Lever73ea6662012-05-21 22:44:50 -0400645 .net = clp->cl_net,
Chuck Lever883bb162008-01-15 16:04:20 -0500646 };
David Howells54ceac42006-08-22 20:06:13 -0400647
Chuck Lever883bb162008-01-15 16:04:20 -0500648 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500649 return 0;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400650 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
651 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500652 return 0;
653
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400654 switch (clp->cl_proto) {
655 default:
656 nlm_init.protocol = IPPROTO_TCP;
657 break;
658 case XPRT_TRANSPORT_UDP:
659 nlm_init.protocol = IPPROTO_UDP;
660 }
661
Chuck Lever883bb162008-01-15 16:04:20 -0500662 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500663 if (IS_ERR(host))
664 return PTR_ERR(host);
665
666 server->nlm_host = host;
667 server->destroy = nfs_destroy_server;
668 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400669}
670
671/*
David Howells54ceac42006-08-22 20:06:13 -0400672 * Create a general RPC client
673 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400674int nfs_init_server_rpcclient(struct nfs_server *server,
Trond Myklebust33170232007-12-20 16:03:59 -0500675 const struct rpc_timeout *timeo,
676 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400677{
678 struct nfs_client *clp = server->nfs_client;
679
Chuck Leverba9b5842012-09-14 17:24:02 -0400680 server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
681 pseudoflavour);
David Howells54ceac42006-08-22 20:06:13 -0400682 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700683 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400684 return PTR_ERR(server->client);
685 }
686
Trond Myklebust33170232007-12-20 16:03:59 -0500687 memcpy(&server->client->cl_timeout_default,
688 timeo,
689 sizeof(server->client->cl_timeout_default));
690 server->client->cl_timeout = &server->client->cl_timeout_default;
David Howells54ceac42006-08-22 20:06:13 -0400691 server->client->cl_softrtry = 0;
692 if (server->flags & NFS_MOUNT_SOFT)
693 server->client->cl_softrtry = 1;
694
David Howells54ceac42006-08-22 20:06:13 -0400695 return 0;
696}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400697EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
David Howells54ceac42006-08-22 20:06:13 -0400698
Chuck Lever8cab4c32012-05-21 22:45:59 -0400699/**
700 * nfs_init_client - Initialise an NFS2 or NFS3 client
701 *
702 * @clp: nfs_client to initialise
703 * @timeparms: timeout parameters for underlying RPC transport
704 * @ip_addr: IP presentation address (not used)
Chuck Lever8cab4c32012-05-21 22:45:59 -0400705 *
706 * Returns pointer to an NFS client, or an ERR_PTR value.
David Howells54ceac42006-08-22 20:06:13 -0400707 */
Chuck Lever8cab4c32012-05-21 22:45:59 -0400708struct nfs_client *nfs_init_client(struct nfs_client *clp,
709 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400710 const char *ip_addr)
David Howells54ceac42006-08-22 20:06:13 -0400711{
David Howells54ceac42006-08-22 20:06:13 -0400712 int error;
713
714 if (clp->cl_cons_state == NFS_CS_READY) {
715 /* the client is already initialised */
716 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400717 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400718 }
719
David Howells54ceac42006-08-22 20:06:13 -0400720 /*
721 * Create a client RPC handle for doing FSSTAT with UNIX auth only
722 * - RFC 2623, sec 2.3.2
723 */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400724 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400725 if (error < 0)
726 goto error;
727 nfs_mark_client_ready(clp, NFS_CS_READY);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400728 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400729
730error:
731 nfs_mark_client_ready(clp, error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400732 nfs_put_client(clp);
David Howells54ceac42006-08-22 20:06:13 -0400733 dprintk("<-- nfs_init_client() = xerror %d\n", error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400734 return ERR_PTR(error);
David Howells54ceac42006-08-22 20:06:13 -0400735}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400736EXPORT_SYMBOL_GPL(nfs_init_client);
David Howells54ceac42006-08-22 20:06:13 -0400737
738/*
739 * Create a version 2 or 3 client
740 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400741static int nfs_init_server(struct nfs_server *server,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400742 const struct nfs_parsed_mount_data *data,
743 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -0400744{
Trond Myklebust3a498022007-12-14 14:56:04 -0500745 struct nfs_client_initdata cl_init = {
746 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500747 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500748 .addrlen = data->nfs_server.addrlen,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400749 .nfs_mod = nfs_mod,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500750 .proto = data->nfs_server.protocol,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400751 .net = data->net,
Trond Myklebust3a498022007-12-14 14:56:04 -0500752 };
Trond Myklebust33170232007-12-20 16:03:59 -0500753 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400754 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500755 int error;
David Howells54ceac42006-08-22 20:06:13 -0400756
757 dprintk("--> nfs_init_server()\n");
758
Andy Adamson45a52a02011-03-01 01:34:08 +0000759 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
760 data->timeo, data->retrans);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400761 if (data->flags & NFS_MOUNT_NORESVPORT)
762 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
Andy Adamson45a52a02011-03-01 01:34:08 +0000763
David Howells54ceac42006-08-22 20:06:13 -0400764 /* Allocate or find a client reference we can use */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400765 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400766 if (IS_ERR(clp)) {
767 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
768 return PTR_ERR(clp);
769 }
770
David Howells54ceac42006-08-22 20:06:13 -0400771 server->nfs_client = clp;
772
773 /* Initialise the client representation from the mount data */
Trond Myklebustff3525a2008-08-15 16:59:14 -0400774 server->flags = data->flags;
David Howellsb797cac2009-04-03 16:42:48 +0100775 server->options = data->options;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400776 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
777 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400778 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR;
David Howells54ceac42006-08-22 20:06:13 -0400779
780 if (data->rsize)
781 server->rsize = nfs_block_size(data->rsize, NULL);
782 if (data->wsize)
783 server->wsize = nfs_block_size(data->wsize, NULL);
784
785 server->acregmin = data->acregmin * HZ;
786 server->acregmax = data->acregmax * HZ;
787 server->acdirmin = data->acdirmin * HZ;
788 server->acdirmax = data->acdirmax * HZ;
789
790 /* Start lockd here, before we might error out */
791 error = nfs_start_lockd(server);
792 if (error < 0)
793 goto error;
794
Chuck Leverf22d6d72008-03-14 14:10:22 -0400795 server->port = data->nfs_server.port;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400796 server->auth_info = data->auth_info;
Chuck Leverf22d6d72008-03-14 14:10:22 -0400797
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400798 error = nfs_init_server_rpcclient(server, &timeparms,
799 data->selected_flavor);
David Howells54ceac42006-08-22 20:06:13 -0400800 if (error < 0)
801 goto error;
802
Chuck Lever3f8400d2008-03-14 14:10:30 -0400803 /* Preserve the values of mount_server-related mount options */
804 if (data->mount_server.addrlen) {
805 memcpy(&server->mountd_address, &data->mount_server.address,
806 data->mount_server.addrlen);
807 server->mountd_addrlen = data->mount_server.addrlen;
808 }
809 server->mountd_version = data->mount_server.version;
810 server->mountd_port = data->mount_server.port;
811 server->mountd_protocol = data->mount_server.protocol;
812
David Howells54ceac42006-08-22 20:06:13 -0400813 server->namelen = data->namlen;
David Howells54ceac42006-08-22 20:06:13 -0400814 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
815 return 0;
816
817error:
818 server->nfs_client = NULL;
819 nfs_put_client(clp);
820 dprintk("<-- nfs_init_server() = xerror %d\n", error);
821 return error;
822}
823
824/*
825 * Load up the server record from information gained in an fsinfo record
826 */
Benny Halevy738fd0f32011-07-30 20:52:36 -0400827static void nfs_server_set_fsinfo(struct nfs_server *server,
Benny Halevy738fd0f32011-07-30 20:52:36 -0400828 struct nfs_fsinfo *fsinfo)
David Howells54ceac42006-08-22 20:06:13 -0400829{
830 unsigned long max_rpc_payload;
831
832 /* Work out a lot of parameters */
833 if (server->rsize == 0)
834 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
835 if (server->wsize == 0)
836 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
837
838 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
839 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
840 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
841 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
842
843 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
844 if (server->rsize > max_rpc_payload)
845 server->rsize = max_rpc_payload;
846 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
847 server->rsize = NFS_MAX_FILE_IO_SIZE;
848 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700849
Jens Axboed9938312009-06-12 14:45:52 +0200850 server->backing_dev_info.name = "nfs";
David Howells54ceac42006-08-22 20:06:13 -0400851 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
852
853 if (server->wsize > max_rpc_payload)
854 server->wsize = max_rpc_payload;
855 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
856 server->wsize = NFS_MAX_FILE_IO_SIZE;
857 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400858
David Howells54ceac42006-08-22 20:06:13 -0400859 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
860
861 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -0400862 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
863 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
David Howells54ceac42006-08-22 20:06:13 -0400864 if (server->dtsize > server->rsize)
865 server->dtsize = server->rsize;
866
867 if (server->flags & NFS_MOUNT_NOAC) {
868 server->acregmin = server->acregmax = 0;
869 server->acdirmin = server->acdirmax = 0;
870 }
871
872 server->maxfilesize = fsinfo->maxfilesize;
873
Ricardo Labiaga6b967242010-10-12 16:30:05 -0700874 server->time_delta = fsinfo->time_delta;
875
David Howells54ceac42006-08-22 20:06:13 -0400876 /* We're airborne Set socket buffersize */
877 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
878}
879
880/*
881 * Probe filesystem information, including the FSID on v2/v3
882 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400883int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
David Howells54ceac42006-08-22 20:06:13 -0400884{
885 struct nfs_fsinfo fsinfo;
886 struct nfs_client *clp = server->nfs_client;
887 int error;
888
889 dprintk("--> nfs_probe_fsinfo()\n");
890
891 if (clp->rpc_ops->set_capabilities != NULL) {
892 error = clp->rpc_ops->set_capabilities(server, mntfh);
893 if (error < 0)
894 goto out_error;
895 }
896
897 fsinfo.fattr = fattr;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400898 fsinfo.layouttype = 0;
David Howells54ceac42006-08-22 20:06:13 -0400899 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
900 if (error < 0)
901 goto out_error;
902
Kinglong Mee71f81e52015-07-01 11:55:50 +0800903 nfs_server_set_fsinfo(server, &fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400904
905 /* Get some general file system info */
906 if (server->namelen == 0) {
907 struct nfs_pathconf pathinfo;
908
909 pathinfo.fattr = fattr;
910 nfs_fattr_init(fattr);
911
912 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
913 server->namelen = pathinfo.max_namelen;
914 }
915
916 dprintk("<-- nfs_probe_fsinfo() = 0\n");
917 return 0;
918
919out_error:
920 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
921 return error;
922}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400923EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400924
925/*
926 * Copy useful information when duplicating a server record
927 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400928void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
David Howells54ceac42006-08-22 20:06:13 -0400929{
930 target->flags = source->flags;
Chuck Lever356e76b2010-04-22 15:35:56 -0400931 target->rsize = source->rsize;
932 target->wsize = source->wsize;
David Howells54ceac42006-08-22 20:06:13 -0400933 target->acregmin = source->acregmin;
934 target->acregmax = source->acregmax;
935 target->acdirmin = source->acdirmin;
936 target->acdirmax = source->acdirmax;
937 target->caps = source->caps;
David Howells2df54802009-09-23 14:36:39 -0400938 target->options = source->options;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400939 target->auth_info = source->auth_info;
David Howells54ceac42006-08-22 20:06:13 -0400940}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400941EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
David Howells54ceac42006-08-22 20:06:13 -0400942
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400943void nfs_server_insert_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000944{
945 struct nfs_client *clp = server->nfs_client;
Chuck Lever73ea6662012-05-21 22:44:50 -0400946 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Chuck Leverfca52382010-12-24 01:32:32 +0000947
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000948 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000949 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +0000950 list_add_tail(&server->master_link, &nn->nfs_volume_list);
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000951 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000952 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000953
954}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400955EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000956
Chuck Lever32e62b72013-10-17 14:12:28 -0400957void nfs_server_remove_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000958{
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000959 struct nfs_client *clp = server->nfs_client;
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500960 struct nfs_net *nn;
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000961
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500962 if (clp == NULL)
963 return;
Chuck Lever73ea6662012-05-21 22:44:50 -0400964 nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000965 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000966 list_del_rcu(&server->client_link);
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500967 if (list_empty(&clp->cl_superblocks))
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000968 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Chuck Leverfca52382010-12-24 01:32:32 +0000969 list_del(&server->master_link);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000970 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000971
972 synchronize_rcu();
973}
Chuck Lever32e62b72013-10-17 14:12:28 -0400974EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000975
David Howells54ceac42006-08-22 20:06:13 -0400976/*
977 * Allocate and initialise a server record
978 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400979struct nfs_server *nfs_alloc_server(void)
David Howells54ceac42006-08-22 20:06:13 -0400980{
981 struct nfs_server *server;
982
983 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
984 if (!server)
985 return NULL;
986
987 server->client = server->client_acl = ERR_PTR(-EINVAL);
988
989 /* Zero out the NFS state stuff */
990 INIT_LIST_HEAD(&server->client_link);
991 INIT_LIST_HEAD(&server->master_link);
Chuck Leverd3978bb2010-12-24 01:33:04 +0000992 INIT_LIST_HEAD(&server->delegations);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400993 INIT_LIST_HEAD(&server->layouts);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500994 INIT_LIST_HEAD(&server->state_owners_lru);
David Howells54ceac42006-08-22 20:06:13 -0400995
Steve Dicksonef818a22007-11-08 04:05:04 -0500996 atomic_set(&server->active, 0);
997
David Howells54ceac42006-08-22 20:06:13 -0400998 server->io_stats = nfs_alloc_iostats();
999 if (!server->io_stats) {
1000 kfree(server);
1001 return NULL;
1002 }
1003
Jens Axboe48d07642009-09-21 09:59:39 +02001004 if (bdi_init(&server->backing_dev_info)) {
1005 nfs_free_iostats(server->io_stats);
1006 kfree(server);
1007 return NULL;
1008 }
1009
Trond Myklebust9157c312012-01-17 22:04:24 -05001010 ida_init(&server->openowner_id);
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001011 ida_init(&server->lockowner_id);
Fred Isamanf7e89172011-01-06 11:36:32 +00001012 pnfs_init_server(server);
1013
David Howells54ceac42006-08-22 20:06:13 -04001014 return server;
1015}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001016EXPORT_SYMBOL_GPL(nfs_alloc_server);
David Howells54ceac42006-08-22 20:06:13 -04001017
1018/*
1019 * Free up a server record
1020 */
1021void nfs_free_server(struct nfs_server *server)
1022{
1023 dprintk("--> nfs_free_server()\n");
1024
Chuck Leverfca52382010-12-24 01:32:32 +00001025 nfs_server_remove_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001026
1027 if (server->destroy != NULL)
1028 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -05001029
1030 if (!IS_ERR(server->client_acl))
1031 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -04001032 if (!IS_ERR(server->client))
1033 rpc_shutdown_client(server->client);
1034
1035 nfs_put_client(server->nfs_client);
1036
Trond Myklebustd2d7ce22012-01-17 22:04:25 -05001037 ida_destroy(&server->lockowner_id);
Trond Myklebust9157c312012-01-17 22:04:24 -05001038 ida_destroy(&server->openowner_id);
David Howells54ceac42006-08-22 20:06:13 -04001039 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -07001040 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -04001041 kfree(server);
1042 nfs_release_automount_timer();
1043 dprintk("<-- nfs_free_server()\n");
1044}
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001045EXPORT_SYMBOL_GPL(nfs_free_server);
David Howells54ceac42006-08-22 20:06:13 -04001046
1047/*
1048 * Create a version 2 or 3 volume record
1049 * - keyed on server and FSID
1050 */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001051struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
Bryan Schumakerab7017a2012-07-30 16:05:16 -04001052 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -04001053{
1054 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001055 struct nfs_fattr *fattr;
David Howells54ceac42006-08-22 20:06:13 -04001056 int error;
1057
1058 server = nfs_alloc_server();
1059 if (!server)
1060 return ERR_PTR(-ENOMEM);
1061
Trond Myklebustfbca7792010-04-16 16:22:46 -04001062 error = -ENOMEM;
1063 fattr = nfs_alloc_fattr();
1064 if (fattr == NULL)
1065 goto error;
1066
David Howells54ceac42006-08-22 20:06:13 -04001067 /* Get a client representation */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001068 error = nfs_init_server(server, mount_info->parsed, nfs_mod);
David Howells54ceac42006-08-22 20:06:13 -04001069 if (error < 0)
1070 goto error;
1071
David Howells54ceac42006-08-22 20:06:13 -04001072 /* Probe the root fh to retrieve its FSID */
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001073 error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -04001074 if (error < 0)
1075 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001076 if (server->nfs_client->rpc_ops->version == 3) {
1077 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
1078 server->namelen = NFS3_MAXNAMLEN;
Bryan Schumaker1179acc2012-07-30 16:05:19 -04001079 if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS))
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001080 server->caps |= NFS_CAP_READDIRPLUS;
1081 } else {
1082 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
1083 server->namelen = NFS2_MAXNAMLEN;
1084 }
1085
Trond Myklebustfbca7792010-04-16 16:22:46 -04001086 if (!(fattr->valid & NFS_ATTR_FATTR)) {
David Quigley1775fd32013-05-22 12:50:42 -04001087 error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL);
David Howells54ceac42006-08-22 20:06:13 -04001088 if (error < 0) {
1089 dprintk("nfs_create_server: getattr error = %d\n", -error);
1090 goto error;
1091 }
1092 }
Trond Myklebustfbca7792010-04-16 16:22:46 -04001093 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
David Howells54ceac42006-08-22 20:06:13 -04001094
David Howells6daabf12006-08-24 15:44:16 -04001095 dprintk("Server FSID: %llx:%llx\n",
1096 (unsigned long long) server->fsid.major,
1097 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001098
Chuck Leverfca52382010-12-24 01:32:32 +00001099 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001100 server->mount_time = jiffies;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001101 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001102 return server;
1103
1104error:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001105 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -04001106 nfs_free_server(server);
1107 return ERR_PTR(error);
1108}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001109EXPORT_SYMBOL_GPL(nfs_create_server);
David Howells54ceac42006-08-22 20:06:13 -04001110
David Howells54ceac42006-08-22 20:06:13 -04001111/*
1112 * Clone an NFS2, NFS3 or NFS4 server record
1113 */
1114struct nfs_server *nfs_clone_server(struct nfs_server *source,
1115 struct nfs_fh *fh,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001116 struct nfs_fattr *fattr,
1117 rpc_authflavor_t flavor)
David Howells54ceac42006-08-22 20:06:13 -04001118{
1119 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001120 struct nfs_fattr *fattr_fsinfo;
David Howells54ceac42006-08-22 20:06:13 -04001121 int error;
1122
1123 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001124 (unsigned long long) fattr->fsid.major,
1125 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001126
1127 server = nfs_alloc_server();
1128 if (!server)
1129 return ERR_PTR(-ENOMEM);
1130
Trond Myklebustfbca7792010-04-16 16:22:46 -04001131 error = -ENOMEM;
1132 fattr_fsinfo = nfs_alloc_fattr();
1133 if (fattr_fsinfo == NULL)
1134 goto out_free_server;
1135
David Howells54ceac42006-08-22 20:06:13 -04001136 /* Copy data from the source */
1137 server->nfs_client = source->nfs_client;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001138 server->destroy = source->destroy;
David Howells54ceac42006-08-22 20:06:13 -04001139 atomic_inc(&server->nfs_client->cl_count);
1140 nfs_server_copy_userdata(server, source);
1141
1142 server->fsid = fattr->fsid;
1143
Trond Myklebust33170232007-12-20 16:03:59 -05001144 error = nfs_init_server_rpcclient(server,
1145 source->client->cl_timeout,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001146 flavor);
David Howells54ceac42006-08-22 20:06:13 -04001147 if (error < 0)
1148 goto out_free_server;
David Howells54ceac42006-08-22 20:06:13 -04001149
1150 /* probe the filesystem info for this server filesystem */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001151 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001152 if (error < 0)
1153 goto out_free_server;
1154
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001155 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1156 server->namelen = NFS4_MAXNAMLEN;
1157
David Howells54ceac42006-08-22 20:06:13 -04001158 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001159 (unsigned long long) server->fsid.major,
1160 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001161
1162 error = nfs_start_lockd(server);
1163 if (error < 0)
1164 goto out_free_server;
1165
Chuck Leverfca52382010-12-24 01:32:32 +00001166 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001167 server->mount_time = jiffies;
1168
Trond Myklebustfbca7792010-04-16 16:22:46 -04001169 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001170 dprintk("<-- nfs_clone_server() = %p\n", server);
1171 return server;
1172
1173out_free_server:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001174 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001175 nfs_free_server(server);
1176 dprintk("<-- nfs_clone_server() = error %d\n", error);
1177 return ERR_PTR(error);
1178}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001179EXPORT_SYMBOL_GPL(nfs_clone_server);
David Howells6aaca562006-08-22 20:06:13 -04001180
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001181void nfs_clients_init(struct net *net)
1182{
1183 struct nfs_net *nn = net_generic(net, nfs_net_id);
1184
1185 INIT_LIST_HEAD(&nn->nfs_client_list);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001186 INIT_LIST_HEAD(&nn->nfs_volume_list);
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001187#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001188 idr_init(&nn->cb_ident_idr);
1189#endif
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001190 spin_lock_init(&nn->nfs_client_lock);
Chuck Leverf0920752012-05-21 22:45:41 -04001191 nn->boot_time = CURRENT_TIME;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001192}
1193
David Howells6aaca562006-08-22 20:06:13 -04001194#ifdef CONFIG_PROC_FS
David Howells6aaca562006-08-22 20:06:13 -04001195static int nfs_server_list_open(struct inode *inode, struct file *file);
1196static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1197static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1198static void nfs_server_list_stop(struct seq_file *p, void *v);
1199static int nfs_server_list_show(struct seq_file *m, void *v);
1200
James Morris88e9d342009-09-22 16:43:43 -07001201static const struct seq_operations nfs_server_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001202 .start = nfs_server_list_start,
1203 .next = nfs_server_list_next,
1204 .stop = nfs_server_list_stop,
1205 .show = nfs_server_list_show,
1206};
1207
Arjan van de Ven00977a52007-02-12 00:55:34 -08001208static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001209 .open = nfs_server_list_open,
1210 .read = seq_read,
1211 .llseek = seq_lseek,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001212 .release = seq_release_net,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001213 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001214};
1215
1216static int nfs_volume_list_open(struct inode *inode, struct file *file);
1217static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1218static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1219static void nfs_volume_list_stop(struct seq_file *p, void *v);
1220static int nfs_volume_list_show(struct seq_file *m, void *v);
1221
James Morris88e9d342009-09-22 16:43:43 -07001222static const struct seq_operations nfs_volume_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001223 .start = nfs_volume_list_start,
1224 .next = nfs_volume_list_next,
1225 .stop = nfs_volume_list_stop,
1226 .show = nfs_volume_list_show,
1227};
1228
Arjan van de Ven00977a52007-02-12 00:55:34 -08001229static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001230 .open = nfs_volume_list_open,
1231 .read = seq_read,
1232 .llseek = seq_lseek,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001233 .release = seq_release_net,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001234 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001235};
1236
1237/*
1238 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1239 * we're dealing
1240 */
1241static int nfs_server_list_open(struct inode *inode, struct file *file)
1242{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001243 return seq_open_net(inode, file, &nfs_server_list_ops,
1244 sizeof(struct seq_net_private));
David Howells6aaca562006-08-22 20:06:13 -04001245}
1246
1247/*
1248 * set up the iterator to start reading from the server list and return the first item
1249 */
1250static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
Jeff Layton8d116202014-09-10 09:04:27 -04001251 __acquires(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001252{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001253 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001254
David Howells6aaca562006-08-22 20:06:13 -04001255 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001256 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001257 return seq_list_start_head(&nn->nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001258}
1259
1260/*
1261 * move to next server
1262 */
1263static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1264{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001265 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001266
1267 return seq_list_next(v, &nn->nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001268}
1269
1270/*
1271 * clean up after reading from the transports list
1272 */
1273static void nfs_server_list_stop(struct seq_file *p, void *v)
Jeff Layton8d116202014-09-10 09:04:27 -04001274 __releases(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001275{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001276 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001277
1278 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001279}
1280
1281/*
1282 * display a header line followed by a load of call lines
1283 */
1284static int nfs_server_list_show(struct seq_file *m, void *v)
1285{
1286 struct nfs_client *clp;
Eric W. Biederman65b38852014-07-31 04:35:20 -07001287 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001288
1289 /* display header on line 1 */
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001290 if (v == &nn->nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001291 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1292 return 0;
1293 }
1294
1295 /* display one transport per line on subsequent lines */
1296 clp = list_entry(v, struct nfs_client, cl_share_link);
1297
Malahal Naineni940aab42011-09-20 17:27:14 -07001298 /* Check if the client is initialized */
1299 if (clp->cl_cons_state != NFS_CS_READY)
1300 return 0;
1301
Trond Myklebust2446ab62012-03-01 17:00:56 -05001302 rcu_read_lock();
Chuck Lever5d8515c2007-12-10 14:57:16 -05001303 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001304 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001305 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1306 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001307 atomic_read(&clp->cl_count),
1308 clp->cl_hostname);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001309 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001310
1311 return 0;
1312}
1313
1314/*
1315 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1316 */
1317static int nfs_volume_list_open(struct inode *inode, struct file *file)
1318{
Fabian Frederick2f3169f2014-09-24 18:56:11 +02001319 return seq_open_net(inode, file, &nfs_volume_list_ops,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001320 sizeof(struct seq_net_private));
David Howells6aaca562006-08-22 20:06:13 -04001321}
1322
1323/*
1324 * set up the iterator to start reading from the volume list and return the first item
1325 */
1326static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
Jeff Layton8d116202014-09-10 09:04:27 -04001327 __acquires(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001328{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001329 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001330
David Howells6aaca562006-08-22 20:06:13 -04001331 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001332 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001333 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001334}
1335
1336/*
1337 * move to next volume
1338 */
1339static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1340{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001341 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001342
1343 return seq_list_next(v, &nn->nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001344}
1345
1346/*
1347 * clean up after reading from the transports list
1348 */
1349static void nfs_volume_list_stop(struct seq_file *p, void *v)
Jeff Layton8d116202014-09-10 09:04:27 -04001350 __releases(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001351{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001352 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001353
1354 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001355}
1356
1357/*
1358 * display a header line followed by a load of call lines
1359 */
1360static int nfs_volume_list_show(struct seq_file *m, void *v)
1361{
1362 struct nfs_server *server;
1363 struct nfs_client *clp;
Kinglong Meedf05a492015-06-13 10:07:00 +08001364 char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0'
1365 char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0'
Eric W. Biederman65b38852014-07-31 04:35:20 -07001366 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001367
1368 /* display header on line 1 */
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001369 if (v == &nn->nfs_volume_list) {
Kinglong Meedf05a492015-06-13 10:07:00 +08001370 seq_puts(m, "NV SERVER PORT DEV FSID"
1371 " FSC\n");
David Howells6aaca562006-08-22 20:06:13 -04001372 return 0;
1373 }
1374 /* display one transport per line on subsequent lines */
1375 server = list_entry(v, struct nfs_server, master_link);
1376 clp = server->nfs_client;
1377
Kinglong Meedf05a492015-06-13 10:07:00 +08001378 snprintf(dev, sizeof(dev), "%u:%u",
David Howells6aaca562006-08-22 20:06:13 -04001379 MAJOR(server->s_dev), MINOR(server->s_dev));
1380
Kinglong Meedf05a492015-06-13 10:07:00 +08001381 snprintf(fsid, sizeof(fsid), "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04001382 (unsigned long long) server->fsid.major,
1383 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04001384
Trond Myklebust2446ab62012-03-01 17:00:56 -05001385 rcu_read_lock();
Kinglong Meedf05a492015-06-13 10:07:00 +08001386 seq_printf(m, "v%u %s %s %-12s %-33s %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001387 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001388 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1389 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001390 dev,
David Howells5d1acff2009-04-03 16:42:47 +01001391 fsid,
1392 nfs_server_fscache_state(server));
Trond Myklebust2446ab62012-03-01 17:00:56 -05001393 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001394
1395 return 0;
1396}
1397
Eric W. Biederman65b38852014-07-31 04:35:20 -07001398int nfs_fs_proc_net_init(struct net *net)
1399{
1400 struct nfs_net *nn = net_generic(net, nfs_net_id);
1401 struct proc_dir_entry *p;
1402
1403 nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net);
1404 if (!nn->proc_nfsfs)
1405 goto error_0;
1406
1407 /* a file of servers with which we're dealing */
1408 p = proc_create("servers", S_IFREG|S_IRUGO,
1409 nn->proc_nfsfs, &nfs_server_list_fops);
1410 if (!p)
1411 goto error_1;
1412
1413 /* a file of volumes that we have mounted */
1414 p = proc_create("volumes", S_IFREG|S_IRUGO,
1415 nn->proc_nfsfs, &nfs_volume_list_fops);
1416 if (!p)
Cong Wang21e81002014-09-08 16:17:55 -07001417 goto error_1;
Eric W. Biederman65b38852014-07-31 04:35:20 -07001418 return 0;
1419
Eric W. Biederman65b38852014-07-31 04:35:20 -07001420error_1:
Cong Wang21e81002014-09-08 16:17:55 -07001421 remove_proc_subtree("nfsfs", net->proc_net);
Eric W. Biederman65b38852014-07-31 04:35:20 -07001422error_0:
1423 return -ENOMEM;
1424}
1425
1426void nfs_fs_proc_net_exit(struct net *net)
1427{
Cong Wang21e81002014-09-08 16:17:55 -07001428 remove_proc_subtree("nfsfs", net->proc_net);
Eric W. Biederman65b38852014-07-31 04:35:20 -07001429}
1430
David Howells6aaca562006-08-22 20:06:13 -04001431/*
1432 * initialise the /proc/fs/nfsfs/ directory
1433 */
1434int __init nfs_fs_proc_init(void)
1435{
Kinglong Mee6a062a32015-07-01 23:00:29 +08001436 if (!proc_mkdir("fs/nfsfs", NULL))
David Howells6aaca562006-08-22 20:06:13 -04001437 goto error_0;
1438
David Howells6aaca562006-08-22 20:06:13 -04001439 /* a file of servers with which we're dealing */
Kinglong Mee6a062a32015-07-01 23:00:29 +08001440 if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers"))
David Howells6aaca562006-08-22 20:06:13 -04001441 goto error_1;
1442
David Howells6aaca562006-08-22 20:06:13 -04001443 /* a file of volumes that we have mounted */
Kinglong Mee6a062a32015-07-01 23:00:29 +08001444 if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes"))
1445 goto error_1;
David Howells6aaca562006-08-22 20:06:13 -04001446
Kinglong Mee6a062a32015-07-01 23:00:29 +08001447 return 0;
David Howells6aaca562006-08-22 20:06:13 -04001448error_1:
Kinglong Mee6a062a32015-07-01 23:00:29 +08001449 remove_proc_subtree("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001450error_0:
1451 return -ENOMEM;
1452}
1453
1454/*
1455 * clean up the /proc/fs/nfsfs/ directory
1456 */
1457void nfs_fs_proc_exit(void)
1458{
Kinglong Mee6a062a32015-07-01 23:00:29 +08001459 remove_proc_subtree("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001460}
1461
1462#endif /* CONFIG_PROC_FS */