blob: d6d5d2a48e838f9b65b5fa71809afc3562c30e27 [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>
Anna Schumakerd8efa4e2015-07-13 14:01:28 -040023#include <linux/sunrpc/addr.h>
David Howells24c8dbb2006-08-22 20:06:10 -040024#include <linux/sunrpc/clnt.h>
25#include <linux/sunrpc/stats.h>
26#include <linux/sunrpc/metrics.h>
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -040027#include <linux/sunrpc/xprtsock.h>
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -040028#include <linux/sunrpc/xprtrdma.h>
David Howells24c8dbb2006-08-22 20:06:10 -040029#include <linux/nfs_fs.h>
30#include <linux/nfs_mount.h>
31#include <linux/nfs4_mount.h>
32#include <linux/lockd/bind.h>
David Howells24c8dbb2006-08-22 20:06:10 -040033#include <linux/seq_file.h>
34#include <linux/mount.h>
David Howells24c8dbb2006-08-22 20:06:10 -040035#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
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400113 if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
114 return ERR_PTR(-EAGAIN);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400115 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;
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400161 if (!try_module_get(clp->cl_nfs_mod->owner))
162 goto error_dealloc;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400163
164 clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
Trond Myklebust40c553192007-12-14 14:56:07 -0500165
David Howells24c8dbb2006-08-22 20:06:10 -0400166 atomic_set(&clp->cl_count, 1);
167 clp->cl_cons_state = NFS_CS_INITING;
168
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500169 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
170 clp->cl_addrlen = cl_init->addrlen;
David Howells24c8dbb2006-08-22 20:06:10 -0400171
Trond Myklebust3a498022007-12-14 14:56:04 -0500172 if (cl_init->hostname) {
Chuck Levera21bdd92009-06-17 18:02:10 -0700173 err = -ENOMEM;
Trond Myklebust3a498022007-12-14 14:56:04 -0500174 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
David Howells24c8dbb2006-08-22 20:06:10 -0400175 if (!clp->cl_hostname)
Benny Halevy71468512009-04-01 09:22:56 -0400176 goto error_cleanup;
David Howells24c8dbb2006-08-22 20:06:10 -0400177 }
178
179 INIT_LIST_HEAD(&clp->cl_superblocks);
180 clp->cl_rpcclient = ERR_PTR(-EINVAL);
181
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500182 clp->cl_proto = cl_init->proto;
Chuck Lever73ea6662012-05-21 22:44:50 -0400183 clp->cl_net = get_net(cl_init->net);
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500184
Trond Myklebust68c97152012-01-03 13:22:46 -0500185 cred = rpc_lookup_machine_cred("*");
Trond Myklebust7c67db32008-04-07 20:50:11 -0400186 if (!IS_ERR(cred))
187 clp->cl_machine_cred = cred;
David Howells14727282009-04-03 16:42:42 +0100188 nfs_fscache_get_client_cookie(clp);
189
David Howells24c8dbb2006-08-22 20:06:10 -0400190 return clp;
191
Benny Halevy71468512009-04-01 09:22:56 -0400192error_cleanup:
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400193 put_nfs_version(clp->cl_nfs_mod);
Alexey Khoroshilov1f70ef92014-07-18 03:11:45 +0400194error_dealloc:
David Howells24c8dbb2006-08-22 20:06:10 -0400195 kfree(clp);
196error_0:
Chuck Levera21bdd92009-06-17 18:02:10 -0700197 return ERR_PTR(err);
David Howells24c8dbb2006-08-22 20:06:10 -0400198}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400199EXPORT_SYMBOL_GPL(nfs_alloc_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400200
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400201#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000202void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000203{
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000204 struct nfs_net *nn = net_generic(net, nfs_net_id);
205
206 idr_destroy(&nn->cb_ident_idr);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000207}
208
209/* nfs_client_lock held */
210static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
211{
Chuck Lever73ea6662012-05-21 22:44:50 -0400212 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000213
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000214 if (clp->cl_cb_ident)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000215 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000216}
217
Fred Isamanf7e89172011-01-06 11:36:32 +0000218static void pnfs_init_server(struct nfs_server *server)
219{
220 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
221}
222
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800223#else
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000224void nfs_cleanup_cb_ident_idr(struct net *net)
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000225{
226}
227
228static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
229{
230}
Fred Isamanf7e89172011-01-06 11:36:32 +0000231
232static void pnfs_init_server(struct nfs_server *server)
233{
234}
235
Alexandros Batsakis888ef2e2010-02-05 03:45:03 -0800236#endif /* CONFIG_NFS_V4 */
237
238/*
David Howells24c8dbb2006-08-22 20:06:10 -0400239 * Destroy a shared client record
240 */
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400241void nfs_free_client(struct nfs_client *clp)
David Howells24c8dbb2006-08-22 20:06:10 -0400242{
Trond Myklebust40c553192007-12-14 14:56:07 -0500243 dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400244
David Howells14727282009-04-03 16:42:42 +0100245 nfs_fscache_release_client_cookie(clp);
246
David Howells24c8dbb2006-08-22 20:06:10 -0400247 /* -EIO all pending I/O */
248 if (!IS_ERR(clp->cl_rpcclient))
249 rpc_shutdown_client(clp->cl_rpcclient);
250
Trond Myklebust7c67db32008-04-07 20:50:11 -0400251 if (clp->cl_machine_cred != NULL)
252 put_rpccred(clp->cl_machine_cred);
253
Chuck Lever73ea6662012-05-21 22:44:50 -0400254 put_net(clp->cl_net);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400255 put_nfs_version(clp->cl_nfs_mod);
David Howells24c8dbb2006-08-22 20:06:10 -0400256 kfree(clp->cl_hostname);
Jeff Laytonf11b2a12014-06-21 20:52:17 -0400257 kfree(clp->cl_acceptor);
David Howells24c8dbb2006-08-22 20:06:10 -0400258 kfree(clp);
259
260 dprintk("<-- nfs_free_client()\n");
261}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400262EXPORT_SYMBOL_GPL(nfs_free_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400263
264/*
265 * Release a reference to a shared client record
266 */
267void nfs_put_client(struct nfs_client *clp)
268{
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000269 struct nfs_net *nn;
270
David Howells27ba8512006-07-30 14:40:56 -0400271 if (!clp)
272 return;
273
David Howells24c8dbb2006-08-22 20:06:10 -0400274 dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count));
Chuck Lever73ea6662012-05-21 22:44:50 -0400275 nn = net_generic(clp->cl_net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400276
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000277 if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
David Howells24c8dbb2006-08-22 20:06:10 -0400278 list_del(&clp->cl_share_link);
Andy Adamsonf4eecd52011-01-06 02:04:30 +0000279 nfs_cb_idr_remove_locked(clp);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000280 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400281
Trond Myklebust1fea73a2012-10-15 11:24:57 -0400282 WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
David Howells24c8dbb2006-08-22 20:06:10 -0400283
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400284 clp->rpc_ops->free_client(clp);
David Howells24c8dbb2006-08-22 20:06:10 -0400285 }
286}
Andy Adamson16b374c2010-10-20 00:18:04 -0400287EXPORT_SYMBOL_GPL(nfs_put_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400288
Trond Myklebust3fbd67a2008-01-26 01:06:40 -0500289/*
Trond Myklebustc81468a2007-12-14 14:56:05 -0500290 * Find an nfs_client on the list that matches the initialisation data
291 * that is supplied.
292 */
293static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
David Howells24c8dbb2006-08-22 20:06:10 -0400294{
295 struct nfs_client *clp;
Ian Dalld7371c42009-03-10 20:33:22 -0400296 const struct sockaddr *sap = data->addr;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000297 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
David Howells24c8dbb2006-08-22 20:06:10 -0400298
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000299 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
Ian Dalld7371c42009-03-10 20:33:22 -0400300 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
Trond Myklebust13bbc062006-10-19 23:28:40 -0700301 /* Don't match clients that failed to initialise properly */
302 if (clp->cl_cons_state < 0)
303 continue;
304
David Howells24c8dbb2006-08-22 20:06:10 -0400305 /* Different NFS versions cannot share the same nfs_client */
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400306 if (clp->rpc_ops != data->nfs_mod->rpc_ops)
David Howells24c8dbb2006-08-22 20:06:10 -0400307 continue;
308
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500309 if (clp->cl_proto != data->proto)
310 continue;
Benny Halevy5aae4a92009-04-01 09:21:50 -0400311 /* Match nfsv4 minorversion */
312 if (clp->cl_minorversion != data->minorversion)
313 continue;
Trond Myklebustc81468a2007-12-14 14:56:05 -0500314 /* Match the full socket address */
Anna Schumakerd8efa4e2015-07-13 14:01:28 -0400315 if (!rpc_cmp_addr_port(sap, clap))
David Howells24c8dbb2006-08-22 20:06:10 -0400316 continue;
317
Trond Myklebustc81468a2007-12-14 14:56:05 -0500318 atomic_inc(&clp->cl_count);
319 return clp;
David Howells24c8dbb2006-08-22 20:06:10 -0400320 }
David Howells24c8dbb2006-08-22 20:06:10 -0400321 return NULL;
David Howells24c8dbb2006-08-22 20:06:10 -0400322}
323
Trond Myklebust4697bd52012-05-23 13:24:36 -0400324static bool nfs_client_init_is_complete(const struct nfs_client *clp)
325{
Trond Myklebust48d66b92015-03-03 20:28:59 -0500326 return clp->cl_cons_state <= NFS_CS_READY;
Trond Myklebust4697bd52012-05-23 13:24:36 -0400327}
328
329int nfs_wait_client_init_complete(const struct nfs_client *clp)
330{
331 return wait_event_killable(nfs_client_active_wq,
332 nfs_client_init_is_complete(clp));
333}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400334EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400335
David Howells24c8dbb2006-08-22 20:06:10 -0400336/*
Chuck Leverf4117032012-05-21 22:45:50 -0400337 * Found an existing client. Make sure it's ready before returning.
338 */
339static struct nfs_client *
340nfs_found_client(const struct nfs_client_initdata *cl_init,
341 struct nfs_client *clp)
342{
343 int error;
344
Trond Myklebust4697bd52012-05-23 13:24:36 -0400345 error = nfs_wait_client_init_complete(clp);
Chuck Leverf4117032012-05-21 22:45:50 -0400346 if (error < 0) {
347 nfs_put_client(clp);
348 return ERR_PTR(-ERESTARTSYS);
349 }
350
351 if (clp->cl_cons_state < NFS_CS_READY) {
352 error = clp->cl_cons_state;
353 nfs_put_client(clp);
354 return ERR_PTR(error);
355 }
356
Trond Myklebust54ac4712012-05-23 13:26:10 -0400357 smp_rmb();
358
Chuck Leverf4117032012-05-21 22:45:50 -0400359 dprintk("<-- %s found nfs_client %p for %s\n",
360 __func__, clp, cl_init->hostname ?: "");
361 return clp;
362}
363
364/*
David Howells24c8dbb2006-08-22 20:06:10 -0400365 * Look up a client by IP address and protocol version
366 * - creates a new record if one doesn't yet exist
367 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400368struct nfs_client *
Andy Adamson45a52a02011-03-01 01:34:08 +0000369nfs_get_client(const struct nfs_client_initdata *cl_init,
370 const struct rpc_timeout *timeparms,
371 const char *ip_addr,
Chuck Lever4bf590e2012-05-21 22:46:07 -0400372 rpc_authflavor_t authflavour)
David Howells24c8dbb2006-08-22 20:06:10 -0400373{
374 struct nfs_client *clp, *new = NULL;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000375 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400376 const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
David Howells24c8dbb2006-08-22 20:06:10 -0400377
Peng Tao31434f42014-07-08 11:45:48 +0800378 if (cl_init->hostname == NULL) {
379 WARN_ON(1);
380 return NULL;
381 }
382
Chuck Leverd7422c42007-12-10 14:58:51 -0500383 dprintk("--> nfs_get_client(%s,v%u)\n",
Peng Tao31434f42014-07-08 11:45:48 +0800384 cl_init->hostname, rpc_ops->version);
David Howells24c8dbb2006-08-22 20:06:10 -0400385
386 /* see if the client already exists */
387 do {
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000388 spin_lock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400389
Trond Myklebustc81468a2007-12-14 14:56:05 -0500390 clp = nfs_match_client(cl_init);
Chuck Leverf4117032012-05-21 22:45:50 -0400391 if (clp) {
392 spin_unlock(&nn->nfs_client_lock);
393 if (new)
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400394 new->rpc_ops->free_client(new);
Chuck Leverf4117032012-05-21 22:45:50 -0400395 return nfs_found_client(cl_init, clp);
396 }
Chuck Lever8cab4c32012-05-21 22:45:59 -0400397 if (new) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400398 list_add_tail(&new->cl_share_link,
399 &nn->nfs_client_list);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400400 spin_unlock(&nn->nfs_client_lock);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400401 new->cl_flags = cl_init->init_flags;
Andy Adamsonf8407292013-07-24 11:59:49 -0400402 return rpc_ops->init_client(new, timeparms, ip_addr);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400403 }
David Howells24c8dbb2006-08-22 20:06:10 -0400404
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000405 spin_unlock(&nn->nfs_client_lock);
David Howells24c8dbb2006-08-22 20:06:10 -0400406
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400407 new = rpc_ops->alloc_client(cl_init);
Chuck Levera21bdd92009-06-17 18:02:10 -0700408 } while (!IS_ERR(new));
David Howells24c8dbb2006-08-22 20:06:10 -0400409
Chuck Leverf4117032012-05-21 22:45:50 -0400410 dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n",
Peng Tao31434f42014-07-08 11:45:48 +0800411 cl_init->hostname, PTR_ERR(new));
Chuck Levera21bdd92009-06-17 18:02:10 -0700412 return new;
David Howells24c8dbb2006-08-22 20:06:10 -0400413}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400414EXPORT_SYMBOL_GPL(nfs_get_client);
David Howells24c8dbb2006-08-22 20:06:10 -0400415
416/*
417 * Mark a server as ready or failed
418 */
Andy Adamson76db6d92009-04-01 09:22:38 -0400419void nfs_mark_client_ready(struct nfs_client *clp, int state)
David Howells24c8dbb2006-08-22 20:06:10 -0400420{
Trond Myklebust54ac4712012-05-23 13:26:10 -0400421 smp_wmb();
David Howells24c8dbb2006-08-22 20:06:10 -0400422 clp->cl_cons_state = state;
423 wake_up_all(&nfs_client_active_wq);
424}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400425EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
David Howells5006a762006-08-22 20:06:12 -0400426
427/*
428 * Initialise the timeout values for a connection
429 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400430void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
David Howells5006a762006-08-22 20:06:12 -0400431 unsigned int timeo, unsigned int retrans)
432{
433 to->to_initval = timeo * HZ / 10;
434 to->to_retries = retrans;
David Howells5006a762006-08-22 20:06:12 -0400435
436 switch (proto) {
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400437 case XPRT_TRANSPORT_TCP:
\"Talpey, Thomas\2cf7ff72007-09-10 13:49:41 -0400438 case XPRT_TRANSPORT_RDMA:
Trond Myklebust259875e2008-07-02 14:43:47 -0400439 if (to->to_retries == 0)
440 to->to_retries = NFS_DEF_TCP_RETRANS;
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500441 if (to->to_initval == 0)
Trond Myklebust259875e2008-07-02 14:43:47 -0400442 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400443 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
444 to->to_initval = NFS_MAX_TCP_TIMEOUT;
445 to->to_increment = to->to_initval;
446 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
Trond Myklebust7a3e3e12007-12-20 16:03:57 -0500447 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
448 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
449 if (to->to_maxval < to->to_initval)
450 to->to_maxval = to->to_initval;
David Howells5006a762006-08-22 20:06:12 -0400451 to->to_exponential = 0;
452 break;
\"Talpey, Thomas\0896a722007-09-10 13:48:23 -0400453 case XPRT_TRANSPORT_UDP:
Trond Myklebust259875e2008-07-02 14:43:47 -0400454 if (to->to_retries == 0)
455 to->to_retries = NFS_DEF_UDP_RETRANS;
David Howells5006a762006-08-22 20:06:12 -0400456 if (!to->to_initval)
Trond Myklebust259875e2008-07-02 14:43:47 -0400457 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
David Howells5006a762006-08-22 20:06:12 -0400458 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
459 to->to_initval = NFS_MAX_UDP_TIMEOUT;
460 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
461 to->to_exponential = 1;
462 break;
Trond Myklebust259875e2008-07-02 14:43:47 -0400463 default:
464 BUG();
David Howells5006a762006-08-22 20:06:12 -0400465 }
466}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400467EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
David Howells5006a762006-08-22 20:06:12 -0400468
469/*
470 * Create an RPC client handle
471 */
Bryan Schumaker428360d2012-07-16 16:39:17 -0400472int nfs_create_rpc_client(struct nfs_client *clp,
473 const struct rpc_timeout *timeparms,
474 rpc_authflavor_t flavor)
David Howells5006a762006-08-22 20:06:12 -0400475{
David Howells5006a762006-08-22 20:06:12 -0400476 struct rpc_clnt *clnt = NULL;
Chuck Lever41877d22006-08-22 20:06:20 -0400477 struct rpc_create_args args = {
Chuck Lever73ea6662012-05-21 22:44:50 -0400478 .net = clp->cl_net,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500479 .protocol = clp->cl_proto,
Chuck Lever41877d22006-08-22 20:06:20 -0400480 .address = (struct sockaddr *)&clp->cl_addr,
Chuck Lever6e4cffd2007-12-10 14:58:15 -0500481 .addrsize = clp->cl_addrlen,
Trond Myklebust33170232007-12-20 16:03:59 -0500482 .timeout = timeparms,
Chuck Lever41877d22006-08-22 20:06:20 -0400483 .servername = clp->cl_hostname,
484 .program = &nfs_program,
485 .version = clp->rpc_ops->version,
486 .authflavor = flavor,
487 };
David Howells5006a762006-08-22 20:06:12 -0400488
Chuck Lever4bf590e2012-05-21 22:46:07 -0400489 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500490 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
Trond Myklebust99875242013-09-24 12:06:07 -0400491 if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
492 args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
Chuck Lever4bf590e2012-05-21 22:46:07 -0400493 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500494 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
Trond Myklebust98f98cf2013-04-14 11:49:51 -0400495 if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
496 args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
Chuck Lever4a01b8a2008-12-23 15:21:35 -0500497
David Howells5006a762006-08-22 20:06:12 -0400498 if (!IS_ERR(clp->cl_rpcclient))
499 return 0;
500
Chuck Lever41877d22006-08-22 20:06:20 -0400501 clnt = rpc_create(&args);
David Howells5006a762006-08-22 20:06:12 -0400502 if (IS_ERR(clnt)) {
503 dprintk("%s: cannot create RPC client. Error = %ld\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -0700504 __func__, PTR_ERR(clnt));
David Howells5006a762006-08-22 20:06:12 -0400505 return PTR_ERR(clnt);
506 }
507
David Howells5006a762006-08-22 20:06:12 -0400508 clp->cl_rpcclient = clnt;
509 return 0;
510}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400511EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
David Howells54ceac42006-08-22 20:06:13 -0400512
513/*
514 * Version 2 or 3 client destruction
515 */
516static void nfs_destroy_server(struct nfs_server *server)
517{
NeilBrownf2596132012-12-13 15:14:36 +1100518 if (server->nlm_host)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500519 nlmclnt_done(server->nlm_host);
David Howells54ceac42006-08-22 20:06:13 -0400520}
521
522/*
523 * Version 2 or 3 lockd setup
524 */
525static int nfs_start_lockd(struct nfs_server *server)
526{
Chuck Lever9289e7f2008-01-11 17:09:52 -0500527 struct nlm_host *host;
528 struct nfs_client *clp = server->nfs_client;
Chuck Lever883bb162008-01-15 16:04:20 -0500529 struct nlmclnt_initdata nlm_init = {
530 .hostname = clp->cl_hostname,
531 .address = (struct sockaddr *)&clp->cl_addr,
532 .addrlen = clp->cl_addrlen,
Chuck Lever883bb162008-01-15 16:04:20 -0500533 .nfs_version = clp->rpc_ops->version,
Chuck Lever0cb26592008-12-23 15:21:38 -0500534 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
535 1 : 0,
Chuck Lever73ea6662012-05-21 22:44:50 -0400536 .net = clp->cl_net,
Chuck Lever883bb162008-01-15 16:04:20 -0500537 };
David Howells54ceac42006-08-22 20:06:13 -0400538
Chuck Lever883bb162008-01-15 16:04:20 -0500539 if (nlm_init.nfs_version > 3)
Chuck Lever9289e7f2008-01-11 17:09:52 -0500540 return 0;
Suresh Jayaraman5eebde22010-09-23 08:55:58 -0400541 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
542 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
Chuck Lever9289e7f2008-01-11 17:09:52 -0500543 return 0;
544
Trond Myklebust8a6e5de2009-09-23 14:36:37 -0400545 switch (clp->cl_proto) {
546 default:
547 nlm_init.protocol = IPPROTO_TCP;
548 break;
549 case XPRT_TRANSPORT_UDP:
550 nlm_init.protocol = IPPROTO_UDP;
551 }
552
Chuck Lever883bb162008-01-15 16:04:20 -0500553 host = nlmclnt_init(&nlm_init);
Chuck Lever9289e7f2008-01-11 17:09:52 -0500554 if (IS_ERR(host))
555 return PTR_ERR(host);
556
557 server->nlm_host = host;
558 server->destroy = nfs_destroy_server;
559 return 0;
David Howells54ceac42006-08-22 20:06:13 -0400560}
561
562/*
David Howells54ceac42006-08-22 20:06:13 -0400563 * Create a general RPC client
564 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400565int nfs_init_server_rpcclient(struct nfs_server *server,
Trond Myklebust33170232007-12-20 16:03:59 -0500566 const struct rpc_timeout *timeo,
567 rpc_authflavor_t pseudoflavour)
David Howells54ceac42006-08-22 20:06:13 -0400568{
569 struct nfs_client *clp = server->nfs_client;
570
Chuck Leverba9b5842012-09-14 17:24:02 -0400571 server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
572 pseudoflavour);
David Howells54ceac42006-08-22 20:06:13 -0400573 if (IS_ERR(server->client)) {
Harvey Harrison3110ff82008-05-02 13:42:44 -0700574 dprintk("%s: couldn't create rpc_client!\n", __func__);
David Howells54ceac42006-08-22 20:06:13 -0400575 return PTR_ERR(server->client);
576 }
577
Trond Myklebust33170232007-12-20 16:03:59 -0500578 memcpy(&server->client->cl_timeout_default,
579 timeo,
580 sizeof(server->client->cl_timeout_default));
581 server->client->cl_timeout = &server->client->cl_timeout_default;
David Howells54ceac42006-08-22 20:06:13 -0400582 server->client->cl_softrtry = 0;
583 if (server->flags & NFS_MOUNT_SOFT)
584 server->client->cl_softrtry = 1;
585
David Howells54ceac42006-08-22 20:06:13 -0400586 return 0;
587}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400588EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
David Howells54ceac42006-08-22 20:06:13 -0400589
Chuck Lever8cab4c32012-05-21 22:45:59 -0400590/**
591 * nfs_init_client - Initialise an NFS2 or NFS3 client
592 *
593 * @clp: nfs_client to initialise
594 * @timeparms: timeout parameters for underlying RPC transport
595 * @ip_addr: IP presentation address (not used)
Chuck Lever8cab4c32012-05-21 22:45:59 -0400596 *
597 * Returns pointer to an NFS client, or an ERR_PTR value.
David Howells54ceac42006-08-22 20:06:13 -0400598 */
Chuck Lever8cab4c32012-05-21 22:45:59 -0400599struct nfs_client *nfs_init_client(struct nfs_client *clp,
600 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400601 const char *ip_addr)
David Howells54ceac42006-08-22 20:06:13 -0400602{
David Howells54ceac42006-08-22 20:06:13 -0400603 int error;
604
605 if (clp->cl_cons_state == NFS_CS_READY) {
606 /* the client is already initialised */
607 dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400608 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400609 }
610
David Howells54ceac42006-08-22 20:06:13 -0400611 /*
612 * Create a client RPC handle for doing FSSTAT with UNIX auth only
613 * - RFC 2623, sec 2.3.2
614 */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400615 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400616 if (error < 0)
617 goto error;
618 nfs_mark_client_ready(clp, NFS_CS_READY);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400619 return clp;
David Howells54ceac42006-08-22 20:06:13 -0400620
621error:
622 nfs_mark_client_ready(clp, error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400623 nfs_put_client(clp);
David Howells54ceac42006-08-22 20:06:13 -0400624 dprintk("<-- nfs_init_client() = xerror %d\n", error);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400625 return ERR_PTR(error);
David Howells54ceac42006-08-22 20:06:13 -0400626}
Bryan Schumakerddda8e02012-07-30 16:05:23 -0400627EXPORT_SYMBOL_GPL(nfs_init_client);
David Howells54ceac42006-08-22 20:06:13 -0400628
629/*
630 * Create a version 2 or 3 client
631 */
\"Talpey, Thomas\2283f8d2007-09-10 13:43:56 -0400632static int nfs_init_server(struct nfs_server *server,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400633 const struct nfs_parsed_mount_data *data,
634 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -0400635{
Trond Myklebust3a498022007-12-14 14:56:04 -0500636 struct nfs_client_initdata cl_init = {
637 .hostname = data->nfs_server.hostname,
Chuck Leverd7422c42007-12-10 14:58:51 -0500638 .addr = (const struct sockaddr *)&data->nfs_server.address,
Chuck Lever4c568012007-12-10 14:59:28 -0500639 .addrlen = data->nfs_server.addrlen,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400640 .nfs_mod = nfs_mod,
Trond Myklebust59dca3b2008-01-03 16:29:06 -0500641 .proto = data->nfs_server.protocol,
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400642 .net = data->net,
Trond Myklebust3a498022007-12-14 14:56:04 -0500643 };
Trond Myklebust33170232007-12-20 16:03:59 -0500644 struct rpc_timeout timeparms;
David Howells54ceac42006-08-22 20:06:13 -0400645 struct nfs_client *clp;
Trond Myklebust3a498022007-12-14 14:56:04 -0500646 int error;
David Howells54ceac42006-08-22 20:06:13 -0400647
648 dprintk("--> nfs_init_server()\n");
649
Andy Adamson45a52a02011-03-01 01:34:08 +0000650 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
651 data->timeo, data->retrans);
Chuck Lever4bf590e2012-05-21 22:46:07 -0400652 if (data->flags & NFS_MOUNT_NORESVPORT)
653 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
Andy Adamson45a52a02011-03-01 01:34:08 +0000654
David Howells54ceac42006-08-22 20:06:13 -0400655 /* Allocate or find a client reference we can use */
Chuck Lever4bf590e2012-05-21 22:46:07 -0400656 clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX);
David Howells54ceac42006-08-22 20:06:13 -0400657 if (IS_ERR(clp)) {
658 dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
659 return PTR_ERR(clp);
660 }
661
David Howells54ceac42006-08-22 20:06:13 -0400662 server->nfs_client = clp;
663
664 /* Initialise the client representation from the mount data */
Trond Myklebustff3525a2008-08-15 16:59:14 -0400665 server->flags = data->flags;
David Howellsb797cac2009-04-03 16:42:48 +0100666 server->options = data->options;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400667 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
668 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
Trond Myklebustcd812592015-07-05 11:12:07 -0400669 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
David Howells54ceac42006-08-22 20:06:13 -0400670
671 if (data->rsize)
672 server->rsize = nfs_block_size(data->rsize, NULL);
673 if (data->wsize)
674 server->wsize = nfs_block_size(data->wsize, NULL);
675
676 server->acregmin = data->acregmin * HZ;
677 server->acregmax = data->acregmax * HZ;
678 server->acdirmin = data->acdirmin * HZ;
679 server->acdirmax = data->acdirmax * HZ;
680
681 /* Start lockd here, before we might error out */
682 error = nfs_start_lockd(server);
683 if (error < 0)
684 goto error;
685
Chuck Leverf22d6d72008-03-14 14:10:22 -0400686 server->port = data->nfs_server.port;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400687 server->auth_info = data->auth_info;
Chuck Leverf22d6d72008-03-14 14:10:22 -0400688
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -0400689 error = nfs_init_server_rpcclient(server, &timeparms,
690 data->selected_flavor);
David Howells54ceac42006-08-22 20:06:13 -0400691 if (error < 0)
692 goto error;
693
Chuck Lever3f8400d2008-03-14 14:10:30 -0400694 /* Preserve the values of mount_server-related mount options */
695 if (data->mount_server.addrlen) {
696 memcpy(&server->mountd_address, &data->mount_server.address,
697 data->mount_server.addrlen);
698 server->mountd_addrlen = data->mount_server.addrlen;
699 }
700 server->mountd_version = data->mount_server.version;
701 server->mountd_port = data->mount_server.port;
702 server->mountd_protocol = data->mount_server.protocol;
703
David Howells54ceac42006-08-22 20:06:13 -0400704 server->namelen = data->namlen;
David Howells54ceac42006-08-22 20:06:13 -0400705 dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp);
706 return 0;
707
708error:
709 server->nfs_client = NULL;
710 nfs_put_client(clp);
711 dprintk("<-- nfs_init_server() = xerror %d\n", error);
712 return error;
713}
714
715/*
716 * Load up the server record from information gained in an fsinfo record
717 */
Benny Halevy738fd0f32011-07-30 20:52:36 -0400718static void nfs_server_set_fsinfo(struct nfs_server *server,
Benny Halevy738fd0f32011-07-30 20:52:36 -0400719 struct nfs_fsinfo *fsinfo)
David Howells54ceac42006-08-22 20:06:13 -0400720{
721 unsigned long max_rpc_payload;
722
723 /* Work out a lot of parameters */
724 if (server->rsize == 0)
725 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
726 if (server->wsize == 0)
727 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
728
729 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
730 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
731 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
732 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
733
734 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
735 if (server->rsize > max_rpc_payload)
736 server->rsize = max_rpc_payload;
737 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
738 server->rsize = NFS_MAX_FILE_IO_SIZE;
739 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700740
Jens Axboed9938312009-06-12 14:45:52 +0200741 server->backing_dev_info.name = "nfs";
David Howells54ceac42006-08-22 20:06:13 -0400742 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
743
744 if (server->wsize > max_rpc_payload)
745 server->wsize = max_rpc_payload;
746 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
747 server->wsize = NFS_MAX_FILE_IO_SIZE;
748 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400749
David Howells54ceac42006-08-22 20:06:13 -0400750 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
751
752 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -0400753 if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
754 server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
David Howells54ceac42006-08-22 20:06:13 -0400755 if (server->dtsize > server->rsize)
756 server->dtsize = server->rsize;
757
758 if (server->flags & NFS_MOUNT_NOAC) {
759 server->acregmin = server->acregmax = 0;
760 server->acdirmin = server->acdirmax = 0;
761 }
762
763 server->maxfilesize = fsinfo->maxfilesize;
764
Ricardo Labiaga6b967242010-10-12 16:30:05 -0700765 server->time_delta = fsinfo->time_delta;
766
Peng Tao2a92ee92015-09-26 02:24:37 +0800767 server->clone_blksize = fsinfo->clone_blksize;
David Howells54ceac42006-08-22 20:06:13 -0400768 /* We're airborne Set socket buffersize */
769 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
770}
771
772/*
773 * Probe filesystem information, including the FSID on v2/v3
774 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400775int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
David Howells54ceac42006-08-22 20:06:13 -0400776{
777 struct nfs_fsinfo fsinfo;
778 struct nfs_client *clp = server->nfs_client;
779 int error;
780
781 dprintk("--> nfs_probe_fsinfo()\n");
782
783 if (clp->rpc_ops->set_capabilities != NULL) {
784 error = clp->rpc_ops->set_capabilities(server, mntfh);
785 if (error < 0)
786 goto out_error;
787 }
788
789 fsinfo.fattr = fattr;
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400790 fsinfo.layouttype = 0;
David Howells54ceac42006-08-22 20:06:13 -0400791 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
792 if (error < 0)
793 goto out_error;
794
Kinglong Mee71f81e52015-07-01 11:55:50 +0800795 nfs_server_set_fsinfo(server, &fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400796
797 /* Get some general file system info */
798 if (server->namelen == 0) {
799 struct nfs_pathconf pathinfo;
800
801 pathinfo.fattr = fattr;
802 nfs_fattr_init(fattr);
803
804 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
805 server->namelen = pathinfo.max_namelen;
806 }
807
808 dprintk("<-- nfs_probe_fsinfo() = 0\n");
809 return 0;
810
811out_error:
812 dprintk("nfs_probe_fsinfo: error = %d\n", -error);
813 return error;
814}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400815EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -0400816
817/*
818 * Copy useful information when duplicating a server record
819 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400820void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
David Howells54ceac42006-08-22 20:06:13 -0400821{
822 target->flags = source->flags;
Chuck Lever356e76b2010-04-22 15:35:56 -0400823 target->rsize = source->rsize;
824 target->wsize = source->wsize;
David Howells54ceac42006-08-22 20:06:13 -0400825 target->acregmin = source->acregmin;
826 target->acregmax = source->acregmax;
827 target->acdirmin = source->acdirmin;
828 target->acdirmax = source->acdirmax;
829 target->caps = source->caps;
David Howells2df54802009-09-23 14:36:39 -0400830 target->options = source->options;
Weston Andros Adamson0f5f49b2013-10-18 15:15:17 -0400831 target->auth_info = source->auth_info;
David Howells54ceac42006-08-22 20:06:13 -0400832}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400833EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
David Howells54ceac42006-08-22 20:06:13 -0400834
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400835void nfs_server_insert_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000836{
837 struct nfs_client *clp = server->nfs_client;
Chuck Lever73ea6662012-05-21 22:44:50 -0400838 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Chuck Leverfca52382010-12-24 01:32:32 +0000839
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000840 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000841 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +0000842 list_add_tail(&server->master_link, &nn->nfs_volume_list);
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000843 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000844 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000845
846}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400847EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000848
Chuck Lever32e62b72013-10-17 14:12:28 -0400849void nfs_server_remove_lists(struct nfs_server *server)
Chuck Leverfca52382010-12-24 01:32:32 +0000850{
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000851 struct nfs_client *clp = server->nfs_client;
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500852 struct nfs_net *nn;
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000853
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500854 if (clp == NULL)
855 return;
Chuck Lever73ea6662012-05-21 22:44:50 -0400856 nn = net_generic(clp->cl_net, nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000857 spin_lock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000858 list_del_rcu(&server->client_link);
Trond Myklebust4c03ae42012-02-07 00:05:11 -0500859 if (list_empty(&clp->cl_superblocks))
Andy Adamsond3b4c9d2011-03-01 01:34:10 +0000860 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
Chuck Leverfca52382010-12-24 01:32:32 +0000861 list_del(&server->master_link);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +0000862 spin_unlock(&nn->nfs_client_lock);
Chuck Leverfca52382010-12-24 01:32:32 +0000863
864 synchronize_rcu();
865}
Chuck Lever32e62b72013-10-17 14:12:28 -0400866EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
Chuck Leverfca52382010-12-24 01:32:32 +0000867
David Howells54ceac42006-08-22 20:06:13 -0400868/*
869 * Allocate and initialise a server record
870 */
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400871struct nfs_server *nfs_alloc_server(void)
David Howells54ceac42006-08-22 20:06:13 -0400872{
873 struct nfs_server *server;
874
875 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
876 if (!server)
877 return NULL;
878
879 server->client = server->client_acl = ERR_PTR(-EINVAL);
880
881 /* Zero out the NFS state stuff */
882 INIT_LIST_HEAD(&server->client_link);
883 INIT_LIST_HEAD(&server->master_link);
Chuck Leverd3978bb2010-12-24 01:33:04 +0000884 INIT_LIST_HEAD(&server->delegations);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400885 INIT_LIST_HEAD(&server->layouts);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500886 INIT_LIST_HEAD(&server->state_owners_lru);
David Howells54ceac42006-08-22 20:06:13 -0400887
Steve Dicksonef818a22007-11-08 04:05:04 -0500888 atomic_set(&server->active, 0);
889
David Howells54ceac42006-08-22 20:06:13 -0400890 server->io_stats = nfs_alloc_iostats();
891 if (!server->io_stats) {
892 kfree(server);
893 return NULL;
894 }
895
Jens Axboe48d07642009-09-21 09:59:39 +0200896 if (bdi_init(&server->backing_dev_info)) {
897 nfs_free_iostats(server->io_stats);
898 kfree(server);
899 return NULL;
900 }
901
Trond Myklebust9157c312012-01-17 22:04:24 -0500902 ida_init(&server->openowner_id);
Trond Myklebustd2d7ce22012-01-17 22:04:25 -0500903 ida_init(&server->lockowner_id);
Fred Isamanf7e89172011-01-06 11:36:32 +0000904 pnfs_init_server(server);
905
David Howells54ceac42006-08-22 20:06:13 -0400906 return server;
907}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400908EXPORT_SYMBOL_GPL(nfs_alloc_server);
David Howells54ceac42006-08-22 20:06:13 -0400909
910/*
911 * Free up a server record
912 */
913void nfs_free_server(struct nfs_server *server)
914{
915 dprintk("--> nfs_free_server()\n");
916
Chuck Leverfca52382010-12-24 01:32:32 +0000917 nfs_server_remove_lists(server);
David Howells54ceac42006-08-22 20:06:13 -0400918
919 if (server->destroy != NULL)
920 server->destroy(server);
Trond Myklebust5cef3382007-12-11 22:01:56 -0500921
922 if (!IS_ERR(server->client_acl))
923 rpc_shutdown_client(server->client_acl);
David Howells54ceac42006-08-22 20:06:13 -0400924 if (!IS_ERR(server->client))
925 rpc_shutdown_client(server->client);
926
927 nfs_put_client(server->nfs_client);
928
Trond Myklebustd2d7ce22012-01-17 22:04:25 -0500929 ida_destroy(&server->lockowner_id);
Trond Myklebust9157c312012-01-17 22:04:24 -0500930 ida_destroy(&server->openowner_id);
David Howells54ceac42006-08-22 20:06:13 -0400931 nfs_free_iostats(server->io_stats);
Peter Zijlstrae0bf68d2007-10-16 23:25:46 -0700932 bdi_destroy(&server->backing_dev_info);
David Howells54ceac42006-08-22 20:06:13 -0400933 kfree(server);
934 nfs_release_automount_timer();
935 dprintk("<-- nfs_free_server()\n");
936}
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400937EXPORT_SYMBOL_GPL(nfs_free_server);
David Howells54ceac42006-08-22 20:06:13 -0400938
939/*
940 * Create a version 2 or 3 volume record
941 * - keyed on server and FSID
942 */
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400943struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400944 struct nfs_subversion *nfs_mod)
David Howells54ceac42006-08-22 20:06:13 -0400945{
946 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -0400947 struct nfs_fattr *fattr;
David Howells54ceac42006-08-22 20:06:13 -0400948 int error;
949
950 server = nfs_alloc_server();
951 if (!server)
952 return ERR_PTR(-ENOMEM);
953
Trond Myklebustfbca7792010-04-16 16:22:46 -0400954 error = -ENOMEM;
955 fattr = nfs_alloc_fattr();
956 if (fattr == NULL)
957 goto error;
958
David Howells54ceac42006-08-22 20:06:13 -0400959 /* Get a client representation */
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400960 error = nfs_init_server(server, mount_info->parsed, nfs_mod);
David Howells54ceac42006-08-22 20:06:13 -0400961 if (error < 0)
962 goto error;
963
David Howells54ceac42006-08-22 20:06:13 -0400964 /* Probe the root fh to retrieve its FSID */
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400965 error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
David Howells54ceac42006-08-22 20:06:13 -0400966 if (error < 0)
967 goto error;
Trond Myklebust54af3bb2007-09-28 12:27:41 -0400968 if (server->nfs_client->rpc_ops->version == 3) {
969 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
970 server->namelen = NFS3_MAXNAMLEN;
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400971 if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS))
Trond Myklebust54af3bb2007-09-28 12:27:41 -0400972 server->caps |= NFS_CAP_READDIRPLUS;
973 } else {
974 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
975 server->namelen = NFS2_MAXNAMLEN;
976 }
977
Trond Myklebustfbca7792010-04-16 16:22:46 -0400978 if (!(fattr->valid & NFS_ATTR_FATTR)) {
David Quigley1775fd32013-05-22 12:50:42 -0400979 error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL);
David Howells54ceac42006-08-22 20:06:13 -0400980 if (error < 0) {
981 dprintk("nfs_create_server: getattr error = %d\n", -error);
982 goto error;
983 }
984 }
Trond Myklebustfbca7792010-04-16 16:22:46 -0400985 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
David Howells54ceac42006-08-22 20:06:13 -0400986
David Howells6daabf12006-08-24 15:44:16 -0400987 dprintk("Server FSID: %llx:%llx\n",
988 (unsigned long long) server->fsid.major,
989 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -0400990
Chuck Leverfca52382010-12-24 01:32:32 +0000991 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -0400992 server->mount_time = jiffies;
Trond Myklebustfbca7792010-04-16 16:22:46 -0400993 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -0400994 return server;
995
996error:
Trond Myklebustfbca7792010-04-16 16:22:46 -0400997 nfs_free_fattr(fattr);
David Howells54ceac42006-08-22 20:06:13 -0400998 nfs_free_server(server);
999 return ERR_PTR(error);
1000}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001001EXPORT_SYMBOL_GPL(nfs_create_server);
David Howells54ceac42006-08-22 20:06:13 -04001002
David Howells54ceac42006-08-22 20:06:13 -04001003/*
1004 * Clone an NFS2, NFS3 or NFS4 server record
1005 */
1006struct nfs_server *nfs_clone_server(struct nfs_server *source,
1007 struct nfs_fh *fh,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001008 struct nfs_fattr *fattr,
1009 rpc_authflavor_t flavor)
David Howells54ceac42006-08-22 20:06:13 -04001010{
1011 struct nfs_server *server;
Trond Myklebustfbca7792010-04-16 16:22:46 -04001012 struct nfs_fattr *fattr_fsinfo;
David Howells54ceac42006-08-22 20:06:13 -04001013 int error;
1014
1015 dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
David Howells6daabf12006-08-24 15:44:16 -04001016 (unsigned long long) fattr->fsid.major,
1017 (unsigned long long) fattr->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001018
1019 server = nfs_alloc_server();
1020 if (!server)
1021 return ERR_PTR(-ENOMEM);
1022
Trond Myklebustfbca7792010-04-16 16:22:46 -04001023 error = -ENOMEM;
1024 fattr_fsinfo = nfs_alloc_fattr();
1025 if (fattr_fsinfo == NULL)
1026 goto out_free_server;
1027
David Howells54ceac42006-08-22 20:06:13 -04001028 /* Copy data from the source */
1029 server->nfs_client = source->nfs_client;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -05001030 server->destroy = source->destroy;
David Howells54ceac42006-08-22 20:06:13 -04001031 atomic_inc(&server->nfs_client->cl_count);
1032 nfs_server_copy_userdata(server, source);
1033
1034 server->fsid = fattr->fsid;
1035
Trond Myklebust33170232007-12-20 16:03:59 -05001036 error = nfs_init_server_rpcclient(server,
1037 source->client->cl_timeout,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -04001038 flavor);
David Howells54ceac42006-08-22 20:06:13 -04001039 if (error < 0)
1040 goto out_free_server;
David Howells54ceac42006-08-22 20:06:13 -04001041
1042 /* probe the filesystem info for this server filesystem */
Trond Myklebustfbca7792010-04-16 16:22:46 -04001043 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001044 if (error < 0)
1045 goto out_free_server;
1046
Trond Myklebust54af3bb2007-09-28 12:27:41 -04001047 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1048 server->namelen = NFS4_MAXNAMLEN;
1049
David Howells54ceac42006-08-22 20:06:13 -04001050 dprintk("Cloned FSID: %llx:%llx\n",
David Howells6daabf12006-08-24 15:44:16 -04001051 (unsigned long long) server->fsid.major,
1052 (unsigned long long) server->fsid.minor);
David Howells54ceac42006-08-22 20:06:13 -04001053
1054 error = nfs_start_lockd(server);
1055 if (error < 0)
1056 goto out_free_server;
1057
Chuck Leverfca52382010-12-24 01:32:32 +00001058 nfs_server_insert_lists(server);
David Howells54ceac42006-08-22 20:06:13 -04001059 server->mount_time = jiffies;
1060
Trond Myklebustfbca7792010-04-16 16:22:46 -04001061 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001062 dprintk("<-- nfs_clone_server() = %p\n", server);
1063 return server;
1064
1065out_free_server:
Trond Myklebustfbca7792010-04-16 16:22:46 -04001066 nfs_free_fattr(fattr_fsinfo);
David Howells54ceac42006-08-22 20:06:13 -04001067 nfs_free_server(server);
1068 dprintk("<-- nfs_clone_server() = error %d\n", error);
1069 return ERR_PTR(error);
1070}
Bryan Schumakerddda8e02012-07-30 16:05:23 -04001071EXPORT_SYMBOL_GPL(nfs_clone_server);
David Howells6aaca562006-08-22 20:06:13 -04001072
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001073void nfs_clients_init(struct net *net)
1074{
1075 struct nfs_net *nn = net_generic(net, nfs_net_id);
1076
1077 INIT_LIST_HEAD(&nn->nfs_client_list);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001078 INIT_LIST_HEAD(&nn->nfs_volume_list);
Bryan Schumaker89d77c82012-07-30 16:05:25 -04001079#if IS_ENABLED(CONFIG_NFS_V4)
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +00001080 idr_init(&nn->cb_ident_idr);
1081#endif
Trond Myklebust4c03ae42012-02-07 00:05:11 -05001082 spin_lock_init(&nn->nfs_client_lock);
Chuck Leverf0920752012-05-21 22:45:41 -04001083 nn->boot_time = CURRENT_TIME;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001084}
1085
David Howells6aaca562006-08-22 20:06:13 -04001086#ifdef CONFIG_PROC_FS
David Howells6aaca562006-08-22 20:06:13 -04001087static int nfs_server_list_open(struct inode *inode, struct file *file);
1088static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1089static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1090static void nfs_server_list_stop(struct seq_file *p, void *v);
1091static int nfs_server_list_show(struct seq_file *m, void *v);
1092
James Morris88e9d342009-09-22 16:43:43 -07001093static const struct seq_operations nfs_server_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001094 .start = nfs_server_list_start,
1095 .next = nfs_server_list_next,
1096 .stop = nfs_server_list_stop,
1097 .show = nfs_server_list_show,
1098};
1099
Arjan van de Ven00977a52007-02-12 00:55:34 -08001100static const struct file_operations nfs_server_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001101 .open = nfs_server_list_open,
1102 .read = seq_read,
1103 .llseek = seq_lseek,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001104 .release = seq_release_net,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001105 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001106};
1107
1108static int nfs_volume_list_open(struct inode *inode, struct file *file);
1109static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1110static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1111static void nfs_volume_list_stop(struct seq_file *p, void *v);
1112static int nfs_volume_list_show(struct seq_file *m, void *v);
1113
James Morris88e9d342009-09-22 16:43:43 -07001114static const struct seq_operations nfs_volume_list_ops = {
David Howells6aaca562006-08-22 20:06:13 -04001115 .start = nfs_volume_list_start,
1116 .next = nfs_volume_list_next,
1117 .stop = nfs_volume_list_stop,
1118 .show = nfs_volume_list_show,
1119};
1120
Arjan van de Ven00977a52007-02-12 00:55:34 -08001121static const struct file_operations nfs_volume_list_fops = {
David Howells6aaca562006-08-22 20:06:13 -04001122 .open = nfs_volume_list_open,
1123 .read = seq_read,
1124 .llseek = seq_lseek,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001125 .release = seq_release_net,
Denis V. Lunev34b37232008-04-29 01:02:07 -07001126 .owner = THIS_MODULE,
David Howells6aaca562006-08-22 20:06:13 -04001127};
1128
1129/*
1130 * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
1131 * we're dealing
1132 */
1133static int nfs_server_list_open(struct inode *inode, struct file *file)
1134{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001135 return seq_open_net(inode, file, &nfs_server_list_ops,
1136 sizeof(struct seq_net_private));
David Howells6aaca562006-08-22 20:06:13 -04001137}
1138
1139/*
1140 * set up the iterator to start reading from the server list and return the first item
1141 */
1142static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
Jeff Layton8d116202014-09-10 09:04:27 -04001143 __acquires(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001144{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001145 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001146
David Howells6aaca562006-08-22 20:06:13 -04001147 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001148 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001149 return seq_list_start_head(&nn->nfs_client_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001150}
1151
1152/*
1153 * move to next server
1154 */
1155static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1156{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001157 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001158
1159 return seq_list_next(v, &nn->nfs_client_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001160}
1161
1162/*
1163 * clean up after reading from the transports list
1164 */
1165static void nfs_server_list_stop(struct seq_file *p, void *v)
Jeff Layton8d116202014-09-10 09:04:27 -04001166 __releases(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001167{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001168 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001169
1170 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001171}
1172
1173/*
1174 * display a header line followed by a load of call lines
1175 */
1176static int nfs_server_list_show(struct seq_file *m, void *v)
1177{
1178 struct nfs_client *clp;
Eric W. Biederman65b38852014-07-31 04:35:20 -07001179 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001180
1181 /* display header on line 1 */
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +00001182 if (v == &nn->nfs_client_list) {
David Howells6aaca562006-08-22 20:06:13 -04001183 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1184 return 0;
1185 }
1186
1187 /* display one transport per line on subsequent lines */
1188 clp = list_entry(v, struct nfs_client, cl_share_link);
1189
Malahal Naineni940aab42011-09-20 17:27:14 -07001190 /* Check if the client is initialized */
1191 if (clp->cl_cons_state != NFS_CS_READY)
1192 return 0;
1193
Trond Myklebust2446ab62012-03-01 17:00:56 -05001194 rcu_read_lock();
Chuck Lever5d8515c2007-12-10 14:57:16 -05001195 seq_printf(m, "v%u %s %s %3d %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001196 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001197 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1198 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001199 atomic_read(&clp->cl_count),
1200 clp->cl_hostname);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001201 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001202
1203 return 0;
1204}
1205
1206/*
1207 * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
1208 */
1209static int nfs_volume_list_open(struct inode *inode, struct file *file)
1210{
Fabian Frederick2f3169f2014-09-24 18:56:11 +02001211 return seq_open_net(inode, file, &nfs_volume_list_ops,
Eric W. Biederman65b38852014-07-31 04:35:20 -07001212 sizeof(struct seq_net_private));
David Howells6aaca562006-08-22 20:06:13 -04001213}
1214
1215/*
1216 * set up the iterator to start reading from the volume list and return the first item
1217 */
1218static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
Jeff Layton8d116202014-09-10 09:04:27 -04001219 __acquires(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001220{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001221 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001222
David Howells6aaca562006-08-22 20:06:13 -04001223 /* lock the list against modification */
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001224 spin_lock(&nn->nfs_client_lock);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001225 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
David Howells6aaca562006-08-22 20:06:13 -04001226}
1227
1228/*
1229 * move to next volume
1230 */
1231static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1232{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001233 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001234
1235 return seq_list_next(v, &nn->nfs_volume_list, pos);
David Howells6aaca562006-08-22 20:06:13 -04001236}
1237
1238/*
1239 * clean up after reading from the transports list
1240 */
1241static void nfs_volume_list_stop(struct seq_file *p, void *v)
Jeff Layton8d116202014-09-10 09:04:27 -04001242 __releases(&nn->nfs_client_lock)
David Howells6aaca562006-08-22 20:06:13 -04001243{
Eric W. Biederman65b38852014-07-31 04:35:20 -07001244 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
Stanislav Kinsburskydc030852012-01-23 17:26:31 +00001245
1246 spin_unlock(&nn->nfs_client_lock);
David Howells6aaca562006-08-22 20:06:13 -04001247}
1248
1249/*
1250 * display a header line followed by a load of call lines
1251 */
1252static int nfs_volume_list_show(struct seq_file *m, void *v)
1253{
1254 struct nfs_server *server;
1255 struct nfs_client *clp;
Kinglong Meedf05a492015-06-13 10:07:00 +08001256 char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0'
1257 char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0'
Eric W. Biederman65b38852014-07-31 04:35:20 -07001258 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
David Howells6aaca562006-08-22 20:06:13 -04001259
1260 /* display header on line 1 */
Stanislav Kinsburskyc25d32b2012-01-23 17:26:14 +00001261 if (v == &nn->nfs_volume_list) {
Kinglong Meedf05a492015-06-13 10:07:00 +08001262 seq_puts(m, "NV SERVER PORT DEV FSID"
1263 " FSC\n");
David Howells6aaca562006-08-22 20:06:13 -04001264 return 0;
1265 }
1266 /* display one transport per line on subsequent lines */
1267 server = list_entry(v, struct nfs_server, master_link);
1268 clp = server->nfs_client;
1269
Kinglong Meedf05a492015-06-13 10:07:00 +08001270 snprintf(dev, sizeof(dev), "%u:%u",
David Howells6aaca562006-08-22 20:06:13 -04001271 MAJOR(server->s_dev), MINOR(server->s_dev));
1272
Kinglong Meedf05a492015-06-13 10:07:00 +08001273 snprintf(fsid, sizeof(fsid), "%llx:%llx",
David Howells6daabf12006-08-24 15:44:16 -04001274 (unsigned long long) server->fsid.major,
1275 (unsigned long long) server->fsid.minor);
David Howells6aaca562006-08-22 20:06:13 -04001276
Trond Myklebust2446ab62012-03-01 17:00:56 -05001277 rcu_read_lock();
Kinglong Meedf05a492015-06-13 10:07:00 +08001278 seq_printf(m, "v%u %s %s %-12s %-33s %s\n",
Trond Myklebust40c553192007-12-14 14:56:07 -05001279 clp->rpc_ops->version,
Chuck Lever5d8515c2007-12-10 14:57:16 -05001280 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1281 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
David Howells6aaca562006-08-22 20:06:13 -04001282 dev,
David Howells5d1acff2009-04-03 16:42:47 +01001283 fsid,
1284 nfs_server_fscache_state(server));
Trond Myklebust2446ab62012-03-01 17:00:56 -05001285 rcu_read_unlock();
David Howells6aaca562006-08-22 20:06:13 -04001286
1287 return 0;
1288}
1289
Eric W. Biederman65b38852014-07-31 04:35:20 -07001290int nfs_fs_proc_net_init(struct net *net)
1291{
1292 struct nfs_net *nn = net_generic(net, nfs_net_id);
1293 struct proc_dir_entry *p;
1294
1295 nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net);
1296 if (!nn->proc_nfsfs)
1297 goto error_0;
1298
1299 /* a file of servers with which we're dealing */
1300 p = proc_create("servers", S_IFREG|S_IRUGO,
1301 nn->proc_nfsfs, &nfs_server_list_fops);
1302 if (!p)
1303 goto error_1;
1304
1305 /* a file of volumes that we have mounted */
1306 p = proc_create("volumes", S_IFREG|S_IRUGO,
1307 nn->proc_nfsfs, &nfs_volume_list_fops);
1308 if (!p)
Cong Wang21e81002014-09-08 16:17:55 -07001309 goto error_1;
Eric W. Biederman65b38852014-07-31 04:35:20 -07001310 return 0;
1311
Eric W. Biederman65b38852014-07-31 04:35:20 -07001312error_1:
Cong Wang21e81002014-09-08 16:17:55 -07001313 remove_proc_subtree("nfsfs", net->proc_net);
Eric W. Biederman65b38852014-07-31 04:35:20 -07001314error_0:
1315 return -ENOMEM;
1316}
1317
1318void nfs_fs_proc_net_exit(struct net *net)
1319{
Cong Wang21e81002014-09-08 16:17:55 -07001320 remove_proc_subtree("nfsfs", net->proc_net);
Eric W. Biederman65b38852014-07-31 04:35:20 -07001321}
1322
David Howells6aaca562006-08-22 20:06:13 -04001323/*
1324 * initialise the /proc/fs/nfsfs/ directory
1325 */
1326int __init nfs_fs_proc_init(void)
1327{
Kinglong Mee6a062a32015-07-01 23:00:29 +08001328 if (!proc_mkdir("fs/nfsfs", NULL))
David Howells6aaca562006-08-22 20:06:13 -04001329 goto error_0;
1330
David Howells6aaca562006-08-22 20:06:13 -04001331 /* a file of servers with which we're dealing */
Kinglong Mee6a062a32015-07-01 23:00:29 +08001332 if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers"))
David Howells6aaca562006-08-22 20:06:13 -04001333 goto error_1;
1334
David Howells6aaca562006-08-22 20:06:13 -04001335 /* a file of volumes that we have mounted */
Kinglong Mee6a062a32015-07-01 23:00:29 +08001336 if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes"))
1337 goto error_1;
David Howells6aaca562006-08-22 20:06:13 -04001338
Kinglong Mee6a062a32015-07-01 23:00:29 +08001339 return 0;
David Howells6aaca562006-08-22 20:06:13 -04001340error_1:
Kinglong Mee6a062a32015-07-01 23:00:29 +08001341 remove_proc_subtree("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001342error_0:
1343 return -ENOMEM;
1344}
1345
1346/*
1347 * clean up the /proc/fs/nfsfs/ directory
1348 */
1349void nfs_fs_proc_exit(void)
1350{
Kinglong Mee6a062a32015-07-01 23:00:29 +08001351 remove_proc_subtree("fs/nfsfs", NULL);
David Howells6aaca562006-08-22 20:06:13 -04001352}
1353
1354#endif /* CONFIG_PROC_FS */