12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
224c8dbbbSDavid Howells /* client.c: NFS client sharing and management code
324c8dbbbSDavid Howells *
424c8dbbbSDavid Howells * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
524c8dbbbSDavid Howells * Written by David Howells (dhowells@redhat.com)
624c8dbbbSDavid Howells */
724c8dbbbSDavid Howells
824c8dbbbSDavid Howells
924c8dbbbSDavid Howells #include <linux/module.h>
1024c8dbbbSDavid Howells #include <linux/init.h>
11e8edc6e0SAlexey Dobriyan #include <linux/sched.h>
1224c8dbbbSDavid Howells #include <linux/time.h>
1324c8dbbbSDavid Howells #include <linux/kernel.h>
1424c8dbbbSDavid Howells #include <linux/mm.h>
1524c8dbbbSDavid Howells #include <linux/string.h>
1624c8dbbbSDavid Howells #include <linux/stat.h>
1724c8dbbbSDavid Howells #include <linux/errno.h>
1824c8dbbbSDavid Howells #include <linux/unistd.h>
19d8efa4e6SAnna Schumaker #include <linux/sunrpc/addr.h>
2024c8dbbbSDavid Howells #include <linux/sunrpc/clnt.h>
2124c8dbbbSDavid Howells #include <linux/sunrpc/stats.h>
2224c8dbbbSDavid Howells #include <linux/sunrpc/metrics.h>
230896a725S\"Talpey, Thomas\ #include <linux/sunrpc/xprtsock.h>
242cf7ff7aS\"Talpey, Thomas\ #include <linux/sunrpc/xprtrdma.h>
2524c8dbbbSDavid Howells #include <linux/nfs_fs.h>
2624c8dbbbSDavid Howells #include <linux/nfs_mount.h>
2724c8dbbbSDavid Howells #include <linux/nfs4_mount.h>
2824c8dbbbSDavid Howells #include <linux/lockd/bind.h>
2924c8dbbbSDavid Howells #include <linux/seq_file.h>
3024c8dbbbSDavid Howells #include <linux/mount.h>
3124c8dbbbSDavid Howells #include <linux/vfs.h>
3224c8dbbbSDavid Howells #include <linux/inet.h>
333b0d3f93STrond Myklebust #include <linux/in6.h>
345a0e3ad6STejun Heo #include <linux/slab.h>
3540401530SAl Viro #include <linux/idr.h>
363b0d3f93STrond Myklebust #include <net/ipv6.h>
3724c8dbbbSDavid Howells #include <linux/nfs_xdr.h>
380b5b7ae0SAndy Adamson #include <linux/sunrpc/bc_xprt.h>
396b13168bSStanislav Kinsbursky #include <linux/nsproxy.h>
406b13168bSStanislav Kinsbursky #include <linux/pid_namespace.h>
4124c8dbbbSDavid Howells
4224c8dbbbSDavid Howells
4324c8dbbbSDavid Howells #include "nfs4_fs.h"
4424c8dbbbSDavid Howells #include "callback.h"
4524c8dbbbSDavid Howells #include "delegation.h"
4624c8dbbbSDavid Howells #include "iostat.h"
4724c8dbbbSDavid Howells #include "internal.h"
4814727281SDavid Howells #include "fscache.h"
4985e174baSRicardo Labiaga #include "pnfs.h"
50ab7017a3SBryan Schumaker #include "nfs.h"
516b13168bSStanislav Kinsbursky #include "netns.h"
52bf11fbdbSTrond Myklebust #include "sysfs.h"
5304a5da69SFrank van der Linden #include "nfs42.h"
5424c8dbbbSDavid Howells
5524c8dbbbSDavid Howells #define NFSDBG_FACILITY NFSDBG_CLIENT
5624c8dbbbSDavid Howells
5724c8dbbbSDavid Howells static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
58ab7017a3SBryan Schumaker static DEFINE_SPINLOCK(nfs_version_lock);
59ab7017a3SBryan Schumaker static DEFINE_MUTEX(nfs_version_mutex);
60ab7017a3SBryan Schumaker static LIST_HEAD(nfs_versions);
6124c8dbbbSDavid Howells
6224c8dbbbSDavid Howells /*
635006a76cSDavid Howells * RPC cruft for NFS
645006a76cSDavid Howells */
65a613fa16STrond Myklebust static const struct rpc_version *nfs_version[5] = {
66ab7017a3SBryan Schumaker [2] = NULL,
67ab7017a3SBryan Schumaker [3] = NULL,
68ab7017a3SBryan Schumaker [4] = NULL,
695006a76cSDavid Howells };
705006a76cSDavid Howells
71a613fa16STrond Myklebust const struct rpc_program nfs_program = {
725006a76cSDavid Howells .name = "nfs",
735006a76cSDavid Howells .number = NFS_PROGRAM,
745006a76cSDavid Howells .nrvers = ARRAY_SIZE(nfs_version),
755006a76cSDavid Howells .version = nfs_version,
76fe0a9b74SJim Rees .pipe_dir_name = NFS_PIPE_DIRNAME,
775006a76cSDavid Howells };
785006a76cSDavid Howells
find_nfs_version(unsigned int version)79ab7017a3SBryan Schumaker static struct nfs_subversion *find_nfs_version(unsigned int version)
80ab7017a3SBryan Schumaker {
81ab7017a3SBryan Schumaker struct nfs_subversion *nfs;
82ab7017a3SBryan Schumaker spin_lock(&nfs_version_lock);
83ab7017a3SBryan Schumaker
84ab7017a3SBryan Schumaker list_for_each_entry(nfs, &nfs_versions, list) {
85ab7017a3SBryan Schumaker if (nfs->rpc_ops->version == version) {
86ab7017a3SBryan Schumaker spin_unlock(&nfs_version_lock);
87ab7017a3SBryan Schumaker return nfs;
88ab7017a3SBryan Schumaker }
89ee34e136SYanchuan Nian }
90ab7017a3SBryan Schumaker
91ab7017a3SBryan Schumaker spin_unlock(&nfs_version_lock);
92ee34e136SYanchuan Nian return ERR_PTR(-EPROTONOSUPPORT);
93ab7017a3SBryan Schumaker }
94ab7017a3SBryan Schumaker
get_nfs_version(unsigned int version)95ab7017a3SBryan Schumaker struct nfs_subversion *get_nfs_version(unsigned int version)
96ab7017a3SBryan Schumaker {
97ab7017a3SBryan Schumaker struct nfs_subversion *nfs = find_nfs_version(version);
98ab7017a3SBryan Schumaker
99ab7017a3SBryan Schumaker if (IS_ERR(nfs)) {
100ab7017a3SBryan Schumaker mutex_lock(&nfs_version_mutex);
1011ae811eeSbjschuma@gmail.com request_module("nfsv%d", version);
102ab7017a3SBryan Schumaker nfs = find_nfs_version(version);
103ab7017a3SBryan Schumaker mutex_unlock(&nfs_version_mutex);
104ab7017a3SBryan Schumaker }
105ab7017a3SBryan Schumaker
1061f70ef96SAlexey Khoroshilov if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
1071f70ef96SAlexey Khoroshilov return ERR_PTR(-EAGAIN);
108ab7017a3SBryan Schumaker return nfs;
109ab7017a3SBryan Schumaker }
110ab7017a3SBryan Schumaker
put_nfs_version(struct nfs_subversion * nfs)111ab7017a3SBryan Schumaker void put_nfs_version(struct nfs_subversion *nfs)
112ab7017a3SBryan Schumaker {
113ab7017a3SBryan Schumaker module_put(nfs->owner);
114ab7017a3SBryan Schumaker }
115ab7017a3SBryan Schumaker
register_nfs_version(struct nfs_subversion * nfs)116ab7017a3SBryan Schumaker void register_nfs_version(struct nfs_subversion *nfs)
117ab7017a3SBryan Schumaker {
118ab7017a3SBryan Schumaker spin_lock(&nfs_version_lock);
119ab7017a3SBryan Schumaker
120ab7017a3SBryan Schumaker list_add(&nfs->list, &nfs_versions);
121ab7017a3SBryan Schumaker nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers;
122ab7017a3SBryan Schumaker
123ab7017a3SBryan Schumaker spin_unlock(&nfs_version_lock);
124ab7017a3SBryan Schumaker }
125ab7017a3SBryan Schumaker EXPORT_SYMBOL_GPL(register_nfs_version);
126ab7017a3SBryan Schumaker
unregister_nfs_version(struct nfs_subversion * nfs)127ab7017a3SBryan Schumaker void unregister_nfs_version(struct nfs_subversion *nfs)
128ab7017a3SBryan Schumaker {
129ab7017a3SBryan Schumaker spin_lock(&nfs_version_lock);
130ab7017a3SBryan Schumaker
131ab7017a3SBryan Schumaker nfs_version[nfs->rpc_ops->version] = NULL;
132ab7017a3SBryan Schumaker list_del(&nfs->list);
133ab7017a3SBryan Schumaker
134ab7017a3SBryan Schumaker spin_unlock(&nfs_version_lock);
135ab7017a3SBryan Schumaker }
136ab7017a3SBryan Schumaker EXPORT_SYMBOL_GPL(unregister_nfs_version);
137ab7017a3SBryan Schumaker
138ab7017a3SBryan Schumaker /*
13924c8dbbbSDavid Howells * Allocate a shared client record
14024c8dbbbSDavid Howells *
14124c8dbbbSDavid Howells * Since these are allocated/deallocated very rarely, we don't
14224c8dbbbSDavid Howells * bother putting them in a slab cache...
14324c8dbbbSDavid Howells */
nfs_alloc_client(const struct nfs_client_initdata * cl_init)1446663ee7fSBryan Schumaker struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
14524c8dbbbSDavid Howells {
14624c8dbbbSDavid Howells struct nfs_client *clp;
147a21bdd9bSChuck Lever int err = -ENOMEM;
14824c8dbbbSDavid Howells
14924c8dbbbSDavid Howells if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
15024c8dbbbSDavid Howells goto error_0;
15124c8dbbbSDavid Howells
15255dee1bcSScott Mayhew clp->cl_minorversion = cl_init->minorversion;
153ab7017a3SBryan Schumaker clp->cl_nfs_mod = cl_init->nfs_mod;
1541f70ef96SAlexey Khoroshilov if (!try_module_get(clp->cl_nfs_mod->owner))
1551f70ef96SAlexey Khoroshilov goto error_dealloc;
156ab7017a3SBryan Schumaker
157ab7017a3SBryan Schumaker clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
15840c55319STrond Myklebust
159212bf41dSElena Reshetova refcount_set(&clp->cl_count, 1);
16024c8dbbbSDavid Howells clp->cl_cons_state = NFS_CS_INITING;
16124c8dbbbSDavid Howells
1626e4cffd7SChuck Lever memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
1636e4cffd7SChuck Lever clp->cl_addrlen = cl_init->addrlen;
16424c8dbbbSDavid Howells
1653a498026STrond Myklebust if (cl_init->hostname) {
166a21bdd9bSChuck Lever err = -ENOMEM;
1673a498026STrond Myklebust clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
16824c8dbbbSDavid Howells if (!clp->cl_hostname)
16971468513SBenny Halevy goto error_cleanup;
17024c8dbbbSDavid Howells }
17124c8dbbbSDavid Howells
17224c8dbbbSDavid Howells INIT_LIST_HEAD(&clp->cl_superblocks);
17324c8dbbbSDavid Howells clp->cl_rpcclient = ERR_PTR(-EINVAL);
17424c8dbbbSDavid Howells
175468d126dSTrond Myklebust clp->cl_flags = cl_init->init_flags;
17659dca3b2STrond Myklebust clp->cl_proto = cl_init->proto;
1776619079dSTrond Myklebust clp->cl_nconnect = cl_init->nconnect;
1787e134205SOlga Kornievskaia clp->cl_max_connect = cl_init->max_connect ? cl_init->max_connect : 1;
17973ea666cSChuck Lever clp->cl_net = get_net(cl_init->net);
18059dca3b2STrond Myklebust
1815e16923bSNeilBrown clp->cl_principal = "*";
1826c0a8c5fSChuck Lever clp->cl_xprtsec = cl_init->xprtsec;
18324c8dbbbSDavid Howells return clp;
18424c8dbbbSDavid Howells
18571468513SBenny Halevy error_cleanup:
186ab7017a3SBryan Schumaker put_nfs_version(clp->cl_nfs_mod);
1871f70ef96SAlexey Khoroshilov error_dealloc:
18824c8dbbbSDavid Howells kfree(clp);
18924c8dbbbSDavid Howells error_0:
190a21bdd9bSChuck Lever return ERR_PTR(err);
19124c8dbbbSDavid Howells }
192ddda8e0aSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_alloc_client);
19324c8dbbbSDavid Howells
19489d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
nfs_cleanup_cb_ident_idr(struct net * net)19510b7a70cSTrond Myklebust static void nfs_cleanup_cb_ident_idr(struct net *net)
196f4eecd5dSAndy Adamson {
19728cd1b3fSStanislav Kinsbursky struct nfs_net *nn = net_generic(net, nfs_net_id);
19828cd1b3fSStanislav Kinsbursky
19928cd1b3fSStanislav Kinsbursky idr_destroy(&nn->cb_ident_idr);
200f4eecd5dSAndy Adamson }
201f4eecd5dSAndy Adamson
202f4eecd5dSAndy Adamson /* nfs_client_lock held */
nfs_cb_idr_remove_locked(struct nfs_client * clp)203f4eecd5dSAndy Adamson static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
204f4eecd5dSAndy Adamson {
20573ea666cSChuck Lever struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
20628cd1b3fSStanislav Kinsbursky
207f4eecd5dSAndy Adamson if (clp->cl_cb_ident)
20828cd1b3fSStanislav Kinsbursky idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
209f4eecd5dSAndy Adamson }
210f4eecd5dSAndy Adamson
pnfs_init_server(struct nfs_server * server)211f7e8917aSFred Isaman static void pnfs_init_server(struct nfs_server *server)
212f7e8917aSFred Isaman {
213f7e8917aSFred Isaman rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
214f7e8917aSFred Isaman }
215f7e8917aSFred Isaman
216888ef2e3SAlexandros Batsakis #else
nfs_cleanup_cb_ident_idr(struct net * net)21710b7a70cSTrond Myklebust static void nfs_cleanup_cb_ident_idr(struct net *net)
218f4eecd5dSAndy Adamson {
219f4eecd5dSAndy Adamson }
220f4eecd5dSAndy Adamson
nfs_cb_idr_remove_locked(struct nfs_client * clp)221f4eecd5dSAndy Adamson static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
222f4eecd5dSAndy Adamson {
223f4eecd5dSAndy Adamson }
224f7e8917aSFred Isaman
pnfs_init_server(struct nfs_server * server)225f7e8917aSFred Isaman static void pnfs_init_server(struct nfs_server *server)
226f7e8917aSFred Isaman {
227f7e8917aSFred Isaman }
228f7e8917aSFred Isaman
229888ef2e3SAlexandros Batsakis #endif /* CONFIG_NFS_V4 */
230888ef2e3SAlexandros Batsakis
231888ef2e3SAlexandros Batsakis /*
2325dd3177aSTrond Myklebust * Destroy a shared client record
2335dd3177aSTrond Myklebust */
nfs_free_client(struct nfs_client * clp)234cdb7ecedSBryan Schumaker void nfs_free_client(struct nfs_client *clp)
2355dd3177aSTrond Myklebust {
23624c8dbbbSDavid Howells /* -EIO all pending I/O */
23724c8dbbbSDavid Howells if (!IS_ERR(clp->cl_rpcclient))
23824c8dbbbSDavid Howells rpc_shutdown_client(clp->cl_rpcclient);
23924c8dbbbSDavid Howells
24073ea666cSChuck Lever put_net(clp->cl_net);
241ab7017a3SBryan Schumaker put_nfs_version(clp->cl_nfs_mod);
24224c8dbbbSDavid Howells kfree(clp->cl_hostname);
243f11b2a1cSJeff Layton kfree(clp->cl_acceptor);
244c1b967d0SAl Viro kfree_rcu(clp, rcu);
24524c8dbbbSDavid Howells }
246ddda8e0aSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_free_client);
24724c8dbbbSDavid Howells
24824c8dbbbSDavid Howells /*
24924c8dbbbSDavid Howells * Release a reference to a shared client record
25024c8dbbbSDavid Howells */
nfs_put_client(struct nfs_client * clp)25124c8dbbbSDavid Howells void nfs_put_client(struct nfs_client *clp)
25224c8dbbbSDavid Howells {
253dc030858SStanislav Kinsbursky struct nfs_net *nn;
254dc030858SStanislav Kinsbursky
25527ba8512SDavid Howells if (!clp)
25627ba8512SDavid Howells return;
25727ba8512SDavid Howells
25873ea666cSChuck Lever nn = net_generic(clp->cl_net, nfs_net_id);
25924c8dbbbSDavid Howells
260212bf41dSElena Reshetova if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
26124c8dbbbSDavid Howells list_del(&clp->cl_share_link);
262f4eecd5dSAndy Adamson nfs_cb_idr_remove_locked(clp);
263dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
26424c8dbbbSDavid Howells
2651fea73a8STrond Myklebust WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
26624c8dbbbSDavid Howells
267cdb7ecedSBryan Schumaker clp->rpc_ops->free_client(clp);
26824c8dbbbSDavid Howells }
26924c8dbbbSDavid Howells }
27016b374caSAndy Adamson EXPORT_SYMBOL_GPL(nfs_put_client);
27124c8dbbbSDavid Howells
2723fbd67adSTrond Myklebust /*
273c81468a1STrond Myklebust * Find an nfs_client on the list that matches the initialisation data
274c81468a1STrond Myklebust * that is supplied.
275c81468a1STrond Myklebust */
nfs_match_client(const struct nfs_client_initdata * data)276c81468a1STrond Myklebust static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
27724c8dbbbSDavid Howells {
27824c8dbbbSDavid Howells struct nfs_client *clp;
279cf0d7e7fSKees Cook const struct sockaddr *sap = (struct sockaddr *)data->addr;
2806b13168bSStanislav Kinsbursky struct nfs_net *nn = net_generic(data->net, nfs_net_id);
281950a578cSRoberto Bergantinos Corpas int error;
28224c8dbbbSDavid Howells
283c156618eSScott Mayhew again:
2846b13168bSStanislav Kinsbursky list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
285d7371c41SIan Dall const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
28613bbc06aSTrond Myklebust /* Don't match clients that failed to initialise properly */
28713bbc06aSTrond Myklebust if (clp->cl_cons_state < 0)
28813bbc06aSTrond Myklebust continue;
28913bbc06aSTrond Myklebust
290c156618eSScott Mayhew /* If a client is still initializing then we need to wait */
291c156618eSScott Mayhew if (clp->cl_cons_state > NFS_CS_READY) {
292c156618eSScott Mayhew refcount_inc(&clp->cl_count);
293c156618eSScott Mayhew spin_unlock(&nn->nfs_client_lock);
294950a578cSRoberto Bergantinos Corpas error = nfs_wait_client_init_complete(clp);
295c156618eSScott Mayhew nfs_put_client(clp);
296c260121aSBenjamin Coddington spin_lock(&nn->nfs_client_lock);
297950a578cSRoberto Bergantinos Corpas if (error < 0)
298950a578cSRoberto Bergantinos Corpas return ERR_PTR(error);
299c156618eSScott Mayhew goto again;
300c156618eSScott Mayhew }
301c156618eSScott Mayhew
30224c8dbbbSDavid Howells /* Different NFS versions cannot share the same nfs_client */
303ab7017a3SBryan Schumaker if (clp->rpc_ops != data->nfs_mod->rpc_ops)
30424c8dbbbSDavid Howells continue;
30524c8dbbbSDavid Howells
30659dca3b2STrond Myklebust if (clp->cl_proto != data->proto)
30759dca3b2STrond Myklebust continue;
3085aae4a9aSBenny Halevy /* Match nfsv4 minorversion */
3095aae4a9aSBenny Halevy if (clp->cl_minorversion != data->minorversion)
3105aae4a9aSBenny Halevy continue;
31152f98f1aSTrond Myklebust
31252f98f1aSTrond Myklebust /* Match request for a dedicated DS */
31352f98f1aSTrond Myklebust if (test_bit(NFS_CS_DS, &data->init_flags) !=
31452f98f1aSTrond Myklebust test_bit(NFS_CS_DS, &clp->cl_flags))
31552f98f1aSTrond Myklebust continue;
31652f98f1aSTrond Myklebust
317c81468a1STrond Myklebust /* Match the full socket address */
318d8efa4e6SAnna Schumaker if (!rpc_cmp_addr_port(sap, clap))
31904ea1b3eSAndy Adamson /* Match all xprt_switch full socket addresses */
3208ef32955SPetr Vandrovec if (IS_ERR(clp->cl_rpcclient) ||
3218ef32955SPetr Vandrovec !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
32204ea1b3eSAndy Adamson sap))
32324c8dbbbSDavid Howells continue;
32424c8dbbbSDavid Howells
3256c0a8c5fSChuck Lever /* Match the xprt security policy */
3266c0a8c5fSChuck Lever if (clp->cl_xprtsec.policy != data->xprtsec.policy)
3276c0a8c5fSChuck Lever continue;
3286c0a8c5fSChuck Lever
329212bf41dSElena Reshetova refcount_inc(&clp->cl_count);
33024c8dbbbSDavid Howells return clp;
33124c8dbbbSDavid Howells }
332c81468a1STrond Myklebust return NULL;
33324c8dbbbSDavid Howells }
33424c8dbbbSDavid Howells
335a33e4b03SWeston Andros Adamson /*
336a33e4b03SWeston Andros Adamson * Return true if @clp is done initializing, false if still working on it.
337a33e4b03SWeston Andros Adamson *
338a33e4b03SWeston Andros Adamson * Use nfs_client_init_status to check if it was successful.
339a33e4b03SWeston Andros Adamson */
nfs_client_init_is_complete(const struct nfs_client * clp)340a33e4b03SWeston Andros Adamson bool nfs_client_init_is_complete(const struct nfs_client *clp)
3414697bd5eSTrond Myklebust {
34248d66b97STrond Myklebust return clp->cl_cons_state <= NFS_CS_READY;
3434697bd5eSTrond Myklebust }
344a33e4b03SWeston Andros Adamson EXPORT_SYMBOL_GPL(nfs_client_init_is_complete);
345a33e4b03SWeston Andros Adamson
346a33e4b03SWeston Andros Adamson /*
347a33e4b03SWeston Andros Adamson * Return 0 if @clp was successfully initialized, -errno otherwise.
348a33e4b03SWeston Andros Adamson *
349a33e4b03SWeston Andros Adamson * This must be called *after* nfs_client_init_is_complete() returns true,
350a33e4b03SWeston Andros Adamson * otherwise it will pop WARN_ON_ONCE and return -EINVAL
351a33e4b03SWeston Andros Adamson */
nfs_client_init_status(const struct nfs_client * clp)352a33e4b03SWeston Andros Adamson int nfs_client_init_status(const struct nfs_client *clp)
353a33e4b03SWeston Andros Adamson {
354a33e4b03SWeston Andros Adamson /* called without checking nfs_client_init_is_complete */
355a33e4b03SWeston Andros Adamson if (clp->cl_cons_state > NFS_CS_READY) {
356a33e4b03SWeston Andros Adamson WARN_ON_ONCE(1);
357a33e4b03SWeston Andros Adamson return -EINVAL;
358a33e4b03SWeston Andros Adamson }
359a33e4b03SWeston Andros Adamson return clp->cl_cons_state;
360a33e4b03SWeston Andros Adamson }
361a33e4b03SWeston Andros Adamson EXPORT_SYMBOL_GPL(nfs_client_init_status);
3624697bd5eSTrond Myklebust
nfs_wait_client_init_complete(const struct nfs_client * clp)3634697bd5eSTrond Myklebust int nfs_wait_client_init_complete(const struct nfs_client *clp)
3644697bd5eSTrond Myklebust {
3654697bd5eSTrond Myklebust return wait_event_killable(nfs_client_active_wq,
3664697bd5eSTrond Myklebust nfs_client_init_is_complete(clp));
3674697bd5eSTrond Myklebust }
36889d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
3694697bd5eSTrond Myklebust
37024c8dbbbSDavid Howells /*
371f411703aSChuck Lever * Found an existing client. Make sure it's ready before returning.
372f411703aSChuck Lever */
373f411703aSChuck Lever static struct nfs_client *
nfs_found_client(const struct nfs_client_initdata * cl_init,struct nfs_client * clp)374f411703aSChuck Lever nfs_found_client(const struct nfs_client_initdata *cl_init,
375f411703aSChuck Lever struct nfs_client *clp)
376f411703aSChuck Lever {
377f411703aSChuck Lever int error;
378f411703aSChuck Lever
3794697bd5eSTrond Myklebust error = nfs_wait_client_init_complete(clp);
380f411703aSChuck Lever if (error < 0) {
381f411703aSChuck Lever nfs_put_client(clp);
382f411703aSChuck Lever return ERR_PTR(-ERESTARTSYS);
383f411703aSChuck Lever }
384f411703aSChuck Lever
385f411703aSChuck Lever if (clp->cl_cons_state < NFS_CS_READY) {
386f411703aSChuck Lever error = clp->cl_cons_state;
387f411703aSChuck Lever nfs_put_client(clp);
388f411703aSChuck Lever return ERR_PTR(error);
389f411703aSChuck Lever }
390f411703aSChuck Lever
39154ac471cSTrond Myklebust smp_rmb();
392f411703aSChuck Lever return clp;
393f411703aSChuck Lever }
394f411703aSChuck Lever
395f411703aSChuck Lever /*
39624c8dbbbSDavid Howells * Look up a client by IP address and protocol version
39724c8dbbbSDavid Howells * - creates a new record if one doesn't yet exist
39824c8dbbbSDavid Howells */
nfs_get_client(const struct nfs_client_initdata * cl_init)3997d38de3fSAnna Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
40024c8dbbbSDavid Howells {
40124c8dbbbSDavid Howells struct nfs_client *clp, *new = NULL;
4026b13168bSStanislav Kinsbursky struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
403ab7017a3SBryan Schumaker const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
40424c8dbbbSDavid Howells
40531434f49SPeng Tao if (cl_init->hostname == NULL) {
40631434f49SPeng Tao WARN_ON(1);
40709226e83SDan Carpenter return ERR_PTR(-EINVAL);
40831434f49SPeng Tao }
40931434f49SPeng Tao
41024c8dbbbSDavid Howells /* see if the client already exists */
41124c8dbbbSDavid Howells do {
412dc030858SStanislav Kinsbursky spin_lock(&nn->nfs_client_lock);
41324c8dbbbSDavid Howells
414c81468a1STrond Myklebust clp = nfs_match_client(cl_init);
415f411703aSChuck Lever if (clp) {
416f411703aSChuck Lever spin_unlock(&nn->nfs_client_lock);
417f411703aSChuck Lever if (new)
418cdb7ecedSBryan Schumaker new->rpc_ops->free_client(new);
4199f7761cfSBenjamin Coddington if (IS_ERR(clp))
4209f7761cfSBenjamin Coddington return clp;
421f411703aSChuck Lever return nfs_found_client(cl_init, clp);
422f411703aSChuck Lever }
4238cab4c39SChuck Lever if (new) {
42405f4c350SChuck Lever list_add_tail(&new->cl_share_link,
42505f4c350SChuck Lever &nn->nfs_client_list);
4268cab4c39SChuck Lever spin_unlock(&nn->nfs_client_lock);
4275c6e5b60STrond Myklebust return rpc_ops->init_client(new, cl_init);
4288cab4c39SChuck Lever }
42924c8dbbbSDavid Howells
430dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
43124c8dbbbSDavid Howells
432ab7017a3SBryan Schumaker new = rpc_ops->alloc_client(cl_init);
433a21bdd9bSChuck Lever } while (!IS_ERR(new));
43424c8dbbbSDavid Howells
435a21bdd9bSChuck Lever return new;
43624c8dbbbSDavid Howells }
43789d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_get_client);
43824c8dbbbSDavid Howells
43924c8dbbbSDavid Howells /*
44024c8dbbbSDavid Howells * Mark a server as ready or failed
44124c8dbbbSDavid Howells */
nfs_mark_client_ready(struct nfs_client * clp,int state)44276db6d95SAndy Adamson void nfs_mark_client_ready(struct nfs_client *clp, int state)
44324c8dbbbSDavid Howells {
44454ac471cSTrond Myklebust smp_wmb();
44524c8dbbbSDavid Howells clp->cl_cons_state = state;
44624c8dbbbSDavid Howells wake_up_all(&nfs_client_active_wq);
44724c8dbbbSDavid Howells }
44889d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
4495006a76cSDavid Howells
4505006a76cSDavid Howells /*
4515006a76cSDavid Howells * Initialise the timeout values for a connection
4525006a76cSDavid Howells */
nfs_init_timeout_values(struct rpc_timeout * to,int proto,int timeo,int retrans)453fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
454a956bedaSTrond Myklebust int timeo, int retrans)
4555006a76cSDavid Howells {
4565006a76cSDavid Howells to->to_initval = timeo * HZ / 10;
4575006a76cSDavid Howells to->to_retries = retrans;
4585006a76cSDavid Howells
4595006a76cSDavid Howells switch (proto) {
4600896a725S\"Talpey, Thomas\ case XPRT_TRANSPORT_TCP:
461c8407f2eSChuck Lever case XPRT_TRANSPORT_TCP_TLS:
4622cf7ff7aS\"Talpey, Thomas\ case XPRT_TRANSPORT_RDMA:
463a956bedaSTrond Myklebust if (retrans == NFS_UNSPEC_RETRANS)
464259875efSTrond Myklebust to->to_retries = NFS_DEF_TCP_RETRANS;
4655a698243STrond Myklebust if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
466259875efSTrond Myklebust to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
4675006a76cSDavid Howells if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
4685006a76cSDavid Howells to->to_initval = NFS_MAX_TCP_TIMEOUT;
4695006a76cSDavid Howells to->to_increment = to->to_initval;
4705006a76cSDavid Howells to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
4717a3e3e18STrond Myklebust if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
4727a3e3e18STrond Myklebust to->to_maxval = NFS_MAX_TCP_TIMEOUT;
4737a3e3e18STrond Myklebust if (to->to_maxval < to->to_initval)
4747a3e3e18STrond Myklebust to->to_maxval = to->to_initval;
4755006a76cSDavid Howells to->to_exponential = 0;
4765006a76cSDavid Howells break;
4770896a725S\"Talpey, Thomas\ case XPRT_TRANSPORT_UDP:
478a956bedaSTrond Myklebust if (retrans == NFS_UNSPEC_RETRANS)
479259875efSTrond Myklebust to->to_retries = NFS_DEF_UDP_RETRANS;
480a956bedaSTrond Myklebust if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
481259875efSTrond Myklebust to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
4825006a76cSDavid Howells if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
4835006a76cSDavid Howells to->to_initval = NFS_MAX_UDP_TIMEOUT;
4845006a76cSDavid Howells to->to_maxval = NFS_MAX_UDP_TIMEOUT;
4855006a76cSDavid Howells to->to_exponential = 1;
4865006a76cSDavid Howells break;
487259875efSTrond Myklebust default:
488259875efSTrond Myklebust BUG();
4895006a76cSDavid Howells }
4905006a76cSDavid Howells }
49189d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
4925006a76cSDavid Howells
4935006a76cSDavid Howells /*
4945006a76cSDavid Howells * Create an RPC client handle
4955006a76cSDavid Howells */
nfs_create_rpc_client(struct nfs_client * clp,const struct nfs_client_initdata * cl_init,rpc_authflavor_t flavor)496428360d7SBryan Schumaker int nfs_create_rpc_client(struct nfs_client *clp,
4975c6e5b60STrond Myklebust const struct nfs_client_initdata *cl_init,
4984bf590e0SChuck Lever rpc_authflavor_t flavor)
4995006a76cSDavid Howells {
5001548036eSJosef Bacik struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5015006a76cSDavid Howells struct rpc_clnt *clnt = NULL;
50241877d20SChuck Lever struct rpc_create_args args = {
50373ea666cSChuck Lever .net = clp->cl_net,
50459dca3b2STrond Myklebust .protocol = clp->cl_proto,
5056619079dSTrond Myklebust .nconnect = clp->cl_nconnect,
50641877d20SChuck Lever .address = (struct sockaddr *)&clp->cl_addr,
5076e4cffd7SChuck Lever .addrsize = clp->cl_addrlen,
5085c6e5b60STrond Myklebust .timeout = cl_init->timeparms,
50941877d20SChuck Lever .servername = clp->cl_hostname,
5105c6e5b60STrond Myklebust .nodename = cl_init->nodename,
51141877d20SChuck Lever .program = &nfs_program,
5121548036eSJosef Bacik .stats = &nn->rpcstats,
51341877d20SChuck Lever .version = clp->rpc_ops->version,
51441877d20SChuck Lever .authflavor = flavor,
5151a58e8a0STrond Myklebust .cred = cl_init->cred,
516c8407f2eSChuck Lever .xprtsec = cl_init->xprtsec,
517537935f7STrond Myklebust .connect_timeout = cl_init->connect_timeout,
518537935f7STrond Myklebust .reconnect_timeout = cl_init->reconnect_timeout,
51941877d20SChuck Lever };
5205006a76cSDavid Howells
5214bf590e0SChuck Lever if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
5224a01b8a4SChuck Lever args.flags |= RPC_CLNT_CREATE_DISCRTRY;
52399875249STrond Myklebust if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
52499875249STrond Myklebust args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
5254bf590e0SChuck Lever if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
5264a01b8a4SChuck Lever args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
52798f98cf5STrond Myklebust if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
52898f98cf5STrond Myklebust args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
5294b1b69ceSTrond Myklebust if (test_bit(NFS_CS_NOPING, &clp->cl_flags))
5304b1b69ceSTrond Myklebust args.flags |= RPC_CLNT_CREATE_NOPING;
531e6237b6fSTrond Myklebust if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags))
532e6237b6fSTrond Myklebust args.flags |= RPC_CLNT_CREATE_REUSEPORT;
5334a01b8a4SChuck Lever
5345006a76cSDavid Howells if (!IS_ERR(clp->cl_rpcclient))
5355006a76cSDavid Howells return 0;
5365006a76cSDavid Howells
53741877d20SChuck Lever clnt = rpc_create(&args);
5385006a76cSDavid Howells if (IS_ERR(clnt)) {
5395006a76cSDavid Howells dprintk("%s: cannot create RPC client. Error = %ld\n",
5403110ff80SHarvey Harrison __func__, PTR_ERR(clnt));
5415006a76cSDavid Howells return PTR_ERR(clnt);
5425006a76cSDavid Howells }
5435006a76cSDavid Howells
5445e16923bSNeilBrown clnt->cl_principal = clp->cl_principal;
5455006a76cSDavid Howells clp->cl_rpcclient = clnt;
546dc48e0abSOlga Kornievskaia clnt->cl_max_connect = clp->cl_max_connect;
5475006a76cSDavid Howells return 0;
5485006a76cSDavid Howells }
54989d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
55054ceac45SDavid Howells
55154ceac45SDavid Howells /*
55254ceac45SDavid Howells * Version 2 or 3 client destruction
55354ceac45SDavid Howells */
nfs_destroy_server(struct nfs_server * server)55454ceac45SDavid Howells static void nfs_destroy_server(struct nfs_server *server)
55554ceac45SDavid Howells {
556f259613aSNeilBrown if (server->nlm_host)
5579289e7f9SChuck Lever nlmclnt_done(server->nlm_host);
55854ceac45SDavid Howells }
55954ceac45SDavid Howells
56054ceac45SDavid Howells /*
56154ceac45SDavid Howells * Version 2 or 3 lockd setup
56254ceac45SDavid Howells */
nfs_start_lockd(struct nfs_server * server)56354ceac45SDavid Howells static int nfs_start_lockd(struct nfs_server *server)
56454ceac45SDavid Howells {
5659289e7f9SChuck Lever struct nlm_host *host;
5669289e7f9SChuck Lever struct nfs_client *clp = server->nfs_client;
567883bb163SChuck Lever struct nlmclnt_initdata nlm_init = {
568883bb163SChuck Lever .hostname = clp->cl_hostname,
569883bb163SChuck Lever .address = (struct sockaddr *)&clp->cl_addr,
570883bb163SChuck Lever .addrlen = clp->cl_addrlen,
571883bb163SChuck Lever .nfs_version = clp->rpc_ops->version,
5720cb2659bSChuck Lever .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
5730cb2659bSChuck Lever 1 : 0,
57473ea666cSChuck Lever .net = clp->cl_net,
575b1ece737SBenjamin Coddington .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
576d18a9d3fSSargun Dhillon .cred = server->cred,
577883bb163SChuck Lever };
57854ceac45SDavid Howells
579883bb163SChuck Lever if (nlm_init.nfs_version > 3)
5809289e7f9SChuck Lever return 0;
5815eebde23SSuresh Jayaraman if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
5825eebde23SSuresh Jayaraman (server->flags & NFS_MOUNT_LOCAL_FCNTL))
5839289e7f9SChuck Lever return 0;
5849289e7f9SChuck Lever
5858a6e5debSTrond Myklebust switch (clp->cl_proto) {
5868a6e5debSTrond Myklebust default:
5878a6e5debSTrond Myklebust nlm_init.protocol = IPPROTO_TCP;
5888a6e5debSTrond Myklebust break;
589b24ee6c6SOlga Kornievskaia #ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT
5908a6e5debSTrond Myklebust case XPRT_TRANSPORT_UDP:
5918a6e5debSTrond Myklebust nlm_init.protocol = IPPROTO_UDP;
592b24ee6c6SOlga Kornievskaia #endif
5938a6e5debSTrond Myklebust }
5948a6e5debSTrond Myklebust
595883bb163SChuck Lever host = nlmclnt_init(&nlm_init);
5969289e7f9SChuck Lever if (IS_ERR(host))
5979289e7f9SChuck Lever return PTR_ERR(host);
5989289e7f9SChuck Lever
5999289e7f9SChuck Lever server->nlm_host = host;
60054ceac45SDavid Howells server->destroy = nfs_destroy_server;
601d97c0589SBenjamin Coddington nfs_sysfs_link_rpc_client(server, nlmclnt_rpc_clnt(host), NULL);
6029289e7f9SChuck Lever return 0;
60354ceac45SDavid Howells }
60454ceac45SDavid Howells
60554ceac45SDavid Howells /*
60654ceac45SDavid Howells * Create a general RPC client
60754ceac45SDavid Howells */
nfs_init_server_rpcclient(struct nfs_server * server,const struct rpc_timeout * timeo,rpc_authflavor_t pseudoflavour)608fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *server,
60933170233STrond Myklebust const struct rpc_timeout *timeo,
61033170233STrond Myklebust rpc_authflavor_t pseudoflavour)
61154ceac45SDavid Howells {
61254ceac45SDavid Howells struct nfs_client *clp = server->nfs_client;
61354ceac45SDavid Howells
614ba9b584cSChuck Lever server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
615ba9b584cSChuck Lever pseudoflavour);
61654ceac45SDavid Howells if (IS_ERR(server->client)) {
6173110ff80SHarvey Harrison dprintk("%s: couldn't create rpc_client!\n", __func__);
61854ceac45SDavid Howells return PTR_ERR(server->client);
61954ceac45SDavid Howells }
62054ceac45SDavid Howells
62133170233STrond Myklebust memcpy(&server->client->cl_timeout_default,
62233170233STrond Myklebust timeo,
62333170233STrond Myklebust sizeof(server->client->cl_timeout_default));
62433170233STrond Myklebust server->client->cl_timeout = &server->client->cl_timeout_default;
62554ceac45SDavid Howells server->client->cl_softrtry = 0;
62691a575e1STrond Myklebust if (server->flags & NFS_MOUNT_SOFTERR)
62791a575e1STrond Myklebust server->client->cl_softerr = 1;
62854ceac45SDavid Howells if (server->flags & NFS_MOUNT_SOFT)
62954ceac45SDavid Howells server->client->cl_softrtry = 1;
63054ceac45SDavid Howells
631e13b5493SBenjamin Coddington nfs_sysfs_link_rpc_client(server, server->client, NULL);
63254ceac45SDavid Howells return 0;
63354ceac45SDavid Howells }
63489d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
63554ceac45SDavid Howells
6368cab4c39SChuck Lever /**
6378cab4c39SChuck Lever * nfs_init_client - Initialise an NFS2 or NFS3 client
6388cab4c39SChuck Lever *
6398cab4c39SChuck Lever * @clp: nfs_client to initialise
6405c6e5b60STrond Myklebust * @cl_init: Initialisation parameters
6418cab4c39SChuck Lever *
6428cab4c39SChuck Lever * Returns pointer to an NFS client, or an ERR_PTR value.
64354ceac45SDavid Howells */
nfs_init_client(struct nfs_client * clp,const struct nfs_client_initdata * cl_init)6448cab4c39SChuck Lever struct nfs_client *nfs_init_client(struct nfs_client *clp,
6455c6e5b60STrond Myklebust const struct nfs_client_initdata *cl_init)
64654ceac45SDavid Howells {
64754ceac45SDavid Howells int error;
64854ceac45SDavid Howells
64954ceac45SDavid Howells /* the client is already initialised */
6502844b6aeSAnna Schumaker if (clp->cl_cons_state == NFS_CS_READY)
6518cab4c39SChuck Lever return clp;
65254ceac45SDavid Howells
65354ceac45SDavid Howells /*
65454ceac45SDavid Howells * Create a client RPC handle for doing FSSTAT with UNIX auth only
65554ceac45SDavid Howells * - RFC 2623, sec 2.3.2
65654ceac45SDavid Howells */
6575c6e5b60STrond Myklebust error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX);
6582844b6aeSAnna Schumaker nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error);
6592844b6aeSAnna Schumaker if (error < 0) {
6608cab4c39SChuck Lever nfs_put_client(clp);
6612844b6aeSAnna Schumaker clp = ERR_PTR(error);
6622844b6aeSAnna Schumaker }
6632844b6aeSAnna Schumaker return clp;
66454ceac45SDavid Howells }
665ddda8e0aSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_init_client);
66654ceac45SDavid Howells
66754ceac45SDavid Howells /*
66854ceac45SDavid Howells * Create a version 2 or 3 client
66954ceac45SDavid Howells */
nfs_init_server(struct nfs_server * server,const struct fs_context * fc)6702283f8d6S\"Talpey, Thomas\ static int nfs_init_server(struct nfs_server *server,
67162a55d08SScott Mayhew const struct fs_context *fc)
67254ceac45SDavid Howells {
67362a55d08SScott Mayhew const struct nfs_fs_context *ctx = nfs_fc2context(fc);
6745c6e5b60STrond Myklebust struct rpc_timeout timeparms;
6753a498026STrond Myklebust struct nfs_client_initdata cl_init = {
67638465f5dSScott Mayhew .hostname = ctx->nfs_server.hostname,
677cf0d7e7fSKees Cook .addr = &ctx->nfs_server._address,
67838465f5dSScott Mayhew .addrlen = ctx->nfs_server.addrlen,
67962a55d08SScott Mayhew .nfs_mod = ctx->nfs_mod,
68038465f5dSScott Mayhew .proto = ctx->nfs_server.protocol,
68162a55d08SScott Mayhew .net = fc->net_ns,
6825c6e5b60STrond Myklebust .timeparms = &timeparms,
6831a58e8a0STrond Myklebust .cred = server->cred,
68438465f5dSScott Mayhew .nconnect = ctx->nfs_server.nconnect,
685e6237b6fSTrond Myklebust .init_flags = (1UL << NFS_CS_REUSEPORT),
686c8407f2eSChuck Lever .xprtsec = ctx->xprtsec,
6873a498026STrond Myklebust };
68854ceac45SDavid Howells struct nfs_client *clp;
6893a498026STrond Myklebust int error;
69054ceac45SDavid Howells
69138465f5dSScott Mayhew nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol,
69238465f5dSScott Mayhew ctx->timeo, ctx->retrans);
69338465f5dSScott Mayhew if (ctx->flags & NFS_MOUNT_NORESVPORT)
6944bf590e0SChuck Lever set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
69545a52a02SAndy Adamson
69654ceac45SDavid Howells /* Allocate or find a client reference we can use */
6977d38de3fSAnna Schumaker clp = nfs_get_client(&cl_init);
6984cbb9768SAnna Schumaker if (IS_ERR(clp))
69954ceac45SDavid Howells return PTR_ERR(clp);
70054ceac45SDavid Howells
70154ceac45SDavid Howells server->nfs_client = clp;
7021c725118SBenjamin Coddington nfs_sysfs_add_server(server);
703e13b5493SBenjamin Coddington nfs_sysfs_link_rpc_client(server, clp->cl_rpcclient, "_state");
70454ceac45SDavid Howells
70554ceac45SDavid Howells /* Initialise the client representation from the mount data */
70638465f5dSScott Mayhew server->flags = ctx->flags;
70738465f5dSScott Mayhew server->options = ctx->options;
708ce62b114STrond Myklebust server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS;
709ce62b114STrond Myklebust
710ce62b114STrond Myklebust switch (clp->rpc_ops->version) {
711ce62b114STrond Myklebust case 2:
712ce62b114STrond Myklebust server->fattr_valid = NFS_ATTR_FATTR_V2;
713ce62b114STrond Myklebust break;
714ce62b114STrond Myklebust case 3:
715ce62b114STrond Myklebust server->fattr_valid = NFS_ATTR_FATTR_V3;
716ce62b114STrond Myklebust break;
717ce62b114STrond Myklebust default:
718ce62b114STrond Myklebust server->fattr_valid = NFS_ATTR_FATTR_V4;
719ce62b114STrond Myklebust }
72054ceac45SDavid Howells
72138465f5dSScott Mayhew if (ctx->rsize)
722940261a1SAnna Schumaker server->rsize = nfs_io_size(ctx->rsize, clp->cl_proto);
72338465f5dSScott Mayhew if (ctx->wsize)
724940261a1SAnna Schumaker server->wsize = nfs_io_size(ctx->wsize, clp->cl_proto);
72554ceac45SDavid Howells
72638465f5dSScott Mayhew server->acregmin = ctx->acregmin * HZ;
72738465f5dSScott Mayhew server->acregmax = ctx->acregmax * HZ;
72838465f5dSScott Mayhew server->acdirmin = ctx->acdirmin * HZ;
72938465f5dSScott Mayhew server->acdirmax = ctx->acdirmax * HZ;
73054ceac45SDavid Howells
73154ceac45SDavid Howells /* Start lockd here, before we might error out */
73254ceac45SDavid Howells error = nfs_start_lockd(server);
73354ceac45SDavid Howells if (error < 0)
73454ceac45SDavid Howells goto error;
73554ceac45SDavid Howells
73638465f5dSScott Mayhew server->port = ctx->nfs_server.port;
73738465f5dSScott Mayhew server->auth_info = ctx->auth_info;
738f22d6d79SChuck Lever
739a3f73c27SWeston Andros Adamson error = nfs_init_server_rpcclient(server, &timeparms,
74038465f5dSScott Mayhew ctx->selected_flavor);
74154ceac45SDavid Howells if (error < 0)
74254ceac45SDavid Howells goto error;
74354ceac45SDavid Howells
7443f8400d1SChuck Lever /* Preserve the values of mount_server-related mount options */
74538465f5dSScott Mayhew if (ctx->mount_server.addrlen) {
74638465f5dSScott Mayhew memcpy(&server->mountd_address, &ctx->mount_server.address,
74738465f5dSScott Mayhew ctx->mount_server.addrlen);
74838465f5dSScott Mayhew server->mountd_addrlen = ctx->mount_server.addrlen;
7493f8400d1SChuck Lever }
75038465f5dSScott Mayhew server->mountd_version = ctx->mount_server.version;
75138465f5dSScott Mayhew server->mountd_port = ctx->mount_server.port;
75238465f5dSScott Mayhew server->mountd_protocol = ctx->mount_server.protocol;
7533f8400d1SChuck Lever
75438465f5dSScott Mayhew server->namelen = ctx->namlen;
75554ceac45SDavid Howells return 0;
75654ceac45SDavid Howells
75754ceac45SDavid Howells error:
75854ceac45SDavid Howells server->nfs_client = NULL;
75954ceac45SDavid Howells nfs_put_client(clp);
76054ceac45SDavid Howells return error;
76154ceac45SDavid Howells }
76254ceac45SDavid Howells
76354ceac45SDavid Howells /*
76454ceac45SDavid Howells * Load up the server record from information gained in an fsinfo record
76554ceac45SDavid Howells */
nfs_server_set_fsinfo(struct nfs_server * server,struct nfs_fsinfo * fsinfo)766738fd0f3SBenny Halevy static void nfs_server_set_fsinfo(struct nfs_server *server,
767738fd0f3SBenny Halevy struct nfs_fsinfo *fsinfo)
76854ceac45SDavid Howells {
769940261a1SAnna Schumaker struct nfs_client *clp = server->nfs_client;
77004a5da69SFrank van der Linden unsigned long max_rpc_payload, raw_max_rpc_payload;
77154ceac45SDavid Howells
77254ceac45SDavid Howells /* Work out a lot of parameters */
77354ceac45SDavid Howells if (server->rsize == 0)
774940261a1SAnna Schumaker server->rsize = nfs_io_size(fsinfo->rtpref, clp->cl_proto);
77554ceac45SDavid Howells if (server->wsize == 0)
776940261a1SAnna Schumaker server->wsize = nfs_io_size(fsinfo->wtpref, clp->cl_proto);
77754ceac45SDavid Howells
77854ceac45SDavid Howells if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
779940261a1SAnna Schumaker server->rsize = nfs_io_size(fsinfo->rtmax, clp->cl_proto);
78054ceac45SDavid Howells if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
781940261a1SAnna Schumaker server->wsize = nfs_io_size(fsinfo->wtmax, clp->cl_proto);
78254ceac45SDavid Howells
78304a5da69SFrank van der Linden raw_max_rpc_payload = rpc_max_payload(server->client);
78404a5da69SFrank van der Linden max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL);
78504a5da69SFrank van der Linden
78654ceac45SDavid Howells if (server->rsize > max_rpc_payload)
78754ceac45SDavid Howells server->rsize = max_rpc_payload;
78854ceac45SDavid Howells if (server->rsize > NFS_MAX_FILE_IO_SIZE)
78954ceac45SDavid Howells server->rsize = NFS_MAX_FILE_IO_SIZE;
79009cbfeafSKirill A. Shutemov server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
791e0bf68ddSPeter Zijlstra
79254ceac45SDavid Howells if (server->wsize > max_rpc_payload)
79354ceac45SDavid Howells server->wsize = max_rpc_payload;
79454ceac45SDavid Howells if (server->wsize > NFS_MAX_FILE_IO_SIZE)
79554ceac45SDavid Howells server->wsize = NFS_MAX_FILE_IO_SIZE;
79609cbfeafSKirill A. Shutemov server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
79785e174baSRicardo Labiaga
79854ceac45SDavid Howells server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
79954ceac45SDavid Howells
80054ceac45SDavid Howells server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
8011a34c8c9STrond Myklebust if (server->dtsize > NFS_MAX_FILE_IO_SIZE)
8021a34c8c9STrond Myklebust server->dtsize = NFS_MAX_FILE_IO_SIZE;
80354ceac45SDavid Howells if (server->dtsize > server->rsize)
80454ceac45SDavid Howells server->dtsize = server->rsize;
80554ceac45SDavid Howells
80654ceac45SDavid Howells if (server->flags & NFS_MOUNT_NOAC) {
80754ceac45SDavid Howells server->acregmin = server->acregmax = 0;
80854ceac45SDavid Howells server->acdirmin = server->acdirmax = 0;
80954ceac45SDavid Howells }
81054ceac45SDavid Howells
81154ceac45SDavid Howells server->maxfilesize = fsinfo->maxfilesize;
81254ceac45SDavid Howells
8136b96724eSRicardo Labiaga server->time_delta = fsinfo->time_delta;
8147f08a335STrond Myklebust server->change_attr_type = fsinfo->change_attr_type;
8156b96724eSRicardo Labiaga
8162a92ee92SPeng Tao server->clone_blksize = fsinfo->clone_blksize;
81754ceac45SDavid Howells /* We're airborne Set socket buffersize */
81854ceac45SDavid Howells rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
81904a5da69SFrank van der Linden
82004a5da69SFrank van der Linden #ifdef CONFIG_NFS_V4_2
82104a5da69SFrank van der Linden /*
82204a5da69SFrank van der Linden * Defaults until limited by the session parameters.
82304a5da69SFrank van der Linden */
82404a5da69SFrank van der Linden server->gxasize = min_t(unsigned int, raw_max_rpc_payload,
82504a5da69SFrank van der Linden XATTR_SIZE_MAX);
82604a5da69SFrank van der Linden server->sxasize = min_t(unsigned int, raw_max_rpc_payload,
82704a5da69SFrank van der Linden XATTR_SIZE_MAX);
82804a5da69SFrank van der Linden server->lxasize = min_t(unsigned int, raw_max_rpc_payload,
82904a5da69SFrank van der Linden nfs42_listxattr_xdrsize(XATTR_LIST_MAX));
830b78ef845SFrank van der Linden
831b78ef845SFrank van der Linden if (fsinfo->xattr_support)
832b78ef845SFrank van der Linden server->caps |= NFS_CAP_XATTR;
83304a5da69SFrank van der Linden #endif
83454ceac45SDavid Howells }
83554ceac45SDavid Howells
83654ceac45SDavid Howells /*
83754ceac45SDavid Howells * Probe filesystem information, including the FSID on v2/v3
83854ceac45SDavid Howells */
nfs_probe_fsinfo(struct nfs_server * server,struct nfs_fh * mntfh,struct nfs_fattr * fattr)8395fe1210dSAnna Schumaker static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
84054ceac45SDavid Howells {
84154ceac45SDavid Howells struct nfs_fsinfo fsinfo;
84254ceac45SDavid Howells struct nfs_client *clp = server->nfs_client;
84354ceac45SDavid Howells int error;
84454ceac45SDavid Howells
84554ceac45SDavid Howells if (clp->rpc_ops->set_capabilities != NULL) {
84654ceac45SDavid Howells error = clp->rpc_ops->set_capabilities(server, mntfh);
84754ceac45SDavid Howells if (error < 0)
8484cbb9768SAnna Schumaker return error;
84954ceac45SDavid Howells }
85054ceac45SDavid Howells
85154ceac45SDavid Howells fsinfo.fattr = fattr;
852ca440c38SJeff Layton fsinfo.nlayouttypes = 0;
8533132e49eSJeff Layton memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype));
85454ceac45SDavid Howells error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
85554ceac45SDavid Howells if (error < 0)
8564cbb9768SAnna Schumaker return error;
85754ceac45SDavid Howells
85871f81e51SKinglong Mee nfs_server_set_fsinfo(server, &fsinfo);
85954ceac45SDavid Howells
86054ceac45SDavid Howells /* Get some general file system info */
86154ceac45SDavid Howells if (server->namelen == 0) {
86254ceac45SDavid Howells struct nfs_pathconf pathinfo;
86354ceac45SDavid Howells
86454ceac45SDavid Howells pathinfo.fattr = fattr;
86554ceac45SDavid Howells nfs_fattr_init(fattr);
86654ceac45SDavid Howells
86754ceac45SDavid Howells if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
86854ceac45SDavid Howells server->namelen = pathinfo.max_namelen;
86954ceac45SDavid Howells }
87054ceac45SDavid Howells
8711976b2b3SOlga Kornievskaia if (clp->rpc_ops->discover_trunking != NULL &&
872a43bf604SOlga Kornievskaia (server->caps & NFS_CAP_FS_LOCATIONS &&
873a43bf604SOlga Kornievskaia (server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) {
8741976b2b3SOlga Kornievskaia error = clp->rpc_ops->discover_trunking(server, mntfh);
8751976b2b3SOlga Kornievskaia if (error < 0)
8761976b2b3SOlga Kornievskaia return error;
8771976b2b3SOlga Kornievskaia }
8781976b2b3SOlga Kornievskaia
87954ceac45SDavid Howells return 0;
88054ceac45SDavid Howells }
88154ceac45SDavid Howells
88254ceac45SDavid Howells /*
883e5731131SAnna Schumaker * Grab the destination's particulars, including lease expiry time.
884e5731131SAnna Schumaker *
885e5731131SAnna Schumaker * Returns zero if probe succeeded and retrieved FSID matches the FSID
886e5731131SAnna Schumaker * we have cached.
887e5731131SAnna Schumaker */
nfs_probe_server(struct nfs_server * server,struct nfs_fh * mntfh)888e5731131SAnna Schumaker int nfs_probe_server(struct nfs_server *server, struct nfs_fh *mntfh)
889e5731131SAnna Schumaker {
890e5731131SAnna Schumaker struct nfs_fattr *fattr;
891e5731131SAnna Schumaker int error;
892e5731131SAnna Schumaker
893e5731131SAnna Schumaker fattr = nfs_alloc_fattr();
894e5731131SAnna Schumaker if (fattr == NULL)
895e5731131SAnna Schumaker return -ENOMEM;
896e5731131SAnna Schumaker
897e5731131SAnna Schumaker /* Sanity: the probe won't work if the destination server
898e5731131SAnna Schumaker * does not recognize the migrated FH. */
899e5731131SAnna Schumaker error = nfs_probe_fsinfo(server, mntfh, fattr);
900e5731131SAnna Schumaker
901e5731131SAnna Schumaker nfs_free_fattr(fattr);
902e5731131SAnna Schumaker return error;
903e5731131SAnna Schumaker }
904e5731131SAnna Schumaker EXPORT_SYMBOL_GPL(nfs_probe_server);
905e5731131SAnna Schumaker
906e5731131SAnna Schumaker /*
90754ceac45SDavid Howells * Copy useful information when duplicating a server record
90854ceac45SDavid Howells */
nfs_server_copy_userdata(struct nfs_server * target,struct nfs_server * source)909fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
91054ceac45SDavid Howells {
91154ceac45SDavid Howells target->flags = source->flags;
912356e76b8SChuck Lever target->rsize = source->rsize;
913356e76b8SChuck Lever target->wsize = source->wsize;
91454ceac45SDavid Howells target->acregmin = source->acregmin;
91554ceac45SDavid Howells target->acregmax = source->acregmax;
91654ceac45SDavid Howells target->acdirmin = source->acdirmin;
91754ceac45SDavid Howells target->acdirmax = source->acdirmax;
91854ceac45SDavid Howells target->caps = source->caps;
9192df54806SDavid Howells target->options = source->options;
9200f5f49b8SWeston Andros Adamson target->auth_info = source->auth_info;
92189a6814dSSteve Dickson target->port = source->port;
92254ceac45SDavid Howells }
92389d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
92454ceac45SDavid Howells
nfs_server_insert_lists(struct nfs_server * server)925fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *server)
926fca5238eSChuck Lever {
927fca5238eSChuck Lever struct nfs_client *clp = server->nfs_client;
92873ea666cSChuck Lever struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
929fca5238eSChuck Lever
930dc030858SStanislav Kinsbursky spin_lock(&nn->nfs_client_lock);
931fca5238eSChuck Lever list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
932c25d32b2SStanislav Kinsbursky list_add_tail(&server->master_link, &nn->nfs_volume_list);
933d3b4c9d7SAndy Adamson clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
934dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
935fca5238eSChuck Lever
936fca5238eSChuck Lever }
93789d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
938fca5238eSChuck Lever
nfs_server_remove_lists(struct nfs_server * server)93932e62b7cSChuck Lever void nfs_server_remove_lists(struct nfs_server *server)
940fca5238eSChuck Lever {
941d3b4c9d7SAndy Adamson struct nfs_client *clp = server->nfs_client;
9424c03ae4aSTrond Myklebust struct nfs_net *nn;
943d3b4c9d7SAndy Adamson
9444c03ae4aSTrond Myklebust if (clp == NULL)
9454c03ae4aSTrond Myklebust return;
94673ea666cSChuck Lever nn = net_generic(clp->cl_net, nfs_net_id);
947dc030858SStanislav Kinsbursky spin_lock(&nn->nfs_client_lock);
948fca5238eSChuck Lever list_del_rcu(&server->client_link);
9494c03ae4aSTrond Myklebust if (list_empty(&clp->cl_superblocks))
950d3b4c9d7SAndy Adamson set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
951fca5238eSChuck Lever list_del(&server->master_link);
952dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
953fca5238eSChuck Lever
954fca5238eSChuck Lever synchronize_rcu();
955fca5238eSChuck Lever }
95632e62b7cSChuck Lever EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
957fca5238eSChuck Lever
9581c725118SBenjamin Coddington static DEFINE_IDA(s_sysfs_ids);
9591c725118SBenjamin Coddington
96054ceac45SDavid Howells /*
96154ceac45SDavid Howells * Allocate and initialise a server record
96254ceac45SDavid Howells */
nfs_alloc_server(void)963fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void)
96454ceac45SDavid Howells {
96554ceac45SDavid Howells struct nfs_server *server;
96654ceac45SDavid Howells
96754ceac45SDavid Howells server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
96854ceac45SDavid Howells if (!server)
96954ceac45SDavid Howells return NULL;
97054ceac45SDavid Howells
9711c725118SBenjamin Coddington server->s_sysfs_id = ida_alloc(&s_sysfs_ids, GFP_KERNEL);
9721c725118SBenjamin Coddington if (server->s_sysfs_id < 0) {
9731c725118SBenjamin Coddington kfree(server);
9741c725118SBenjamin Coddington return NULL;
9751c725118SBenjamin Coddington }
9761c725118SBenjamin Coddington
97754ceac45SDavid Howells server->client = server->client_acl = ERR_PTR(-EINVAL);
97854ceac45SDavid Howells
97954ceac45SDavid Howells /* Zero out the NFS state stuff */
98054ceac45SDavid Howells INIT_LIST_HEAD(&server->client_link);
98154ceac45SDavid Howells INIT_LIST_HEAD(&server->master_link);
982d3978bb3SChuck Lever INIT_LIST_HEAD(&server->delegations);
9836382a441SWeston Andros Adamson INIT_LIST_HEAD(&server->layouts);
9840aaaf5c4SChuck Lever INIT_LIST_HEAD(&server->state_owners_lru);
98562164f31SOlga Kornievskaia INIT_LIST_HEAD(&server->ss_copies);
98654ceac45SDavid Howells
987ef818a28SSteve Dickson atomic_set(&server->active, 0);
988ef818a28SSteve Dickson
98954ceac45SDavid Howells server->io_stats = nfs_alloc_iostats();
99054ceac45SDavid Howells if (!server->io_stats) {
99154ceac45SDavid Howells kfree(server);
99254ceac45SDavid Howells return NULL;
99354ceac45SDavid Howells }
99454ceac45SDavid Howells
9957f08a335STrond Myklebust server->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED;
9967f08a335STrond Myklebust
997*2f1f3104SJan Kara init_waitqueue_head(&server->write_congestion_wait);
998f8a39550SJan Kara atomic_long_set(&server->writeback, 0);
999f8a39550SJan Kara
10009157c31dSTrond Myklebust ida_init(&server->openowner_id);
1001d2d7ce28STrond Myklebust ida_init(&server->lockowner_id);
1002f7e8917aSFred Isaman pnfs_init_server(server);
100368ebf8feSBenjamin Coddington rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC");
1004f7e8917aSFred Isaman
100554ceac45SDavid Howells return server;
100654ceac45SDavid Howells }
100789d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_alloc_server);
100854ceac45SDavid Howells
delayed_free(struct rcu_head * p)1009c1b967d0SAl Viro static void delayed_free(struct rcu_head *p)
1010c1b967d0SAl Viro {
1011c1b967d0SAl Viro struct nfs_server *server = container_of(p, struct nfs_server, rcu);
1012c1b967d0SAl Viro
1013c1b967d0SAl Viro nfs_free_iostats(server->io_stats);
1014c1b967d0SAl Viro kfree(server);
1015c1b967d0SAl Viro }
1016c1b967d0SAl Viro
101754ceac45SDavid Howells /*
101854ceac45SDavid Howells * Free up a server record
101954ceac45SDavid Howells */
nfs_free_server(struct nfs_server * server)102054ceac45SDavid Howells void nfs_free_server(struct nfs_server *server)
102154ceac45SDavid Howells {
1022fca5238eSChuck Lever nfs_server_remove_lists(server);
102354ceac45SDavid Howells
102454ceac45SDavid Howells if (server->destroy != NULL)
102554ceac45SDavid Howells server->destroy(server);
10265cef338bSTrond Myklebust
10275cef338bSTrond Myklebust if (!IS_ERR(server->client_acl))
10285cef338bSTrond Myklebust rpc_shutdown_client(server->client_acl);
102954ceac45SDavid Howells if (!IS_ERR(server->client))
103054ceac45SDavid Howells rpc_shutdown_client(server->client);
103154ceac45SDavid Howells
103254ceac45SDavid Howells nfs_put_client(server->nfs_client);
103354ceac45SDavid Howells
1034e901f17bSBenjamin Coddington if (server->kobj.state_initialized) {
10351c725118SBenjamin Coddington nfs_sysfs_remove_server(server);
10361c725118SBenjamin Coddington kobject_put(&server->kobj);
1037e901f17bSBenjamin Coddington }
10381c725118SBenjamin Coddington ida_free(&s_sysfs_ids, server->s_sysfs_id);
10391c725118SBenjamin Coddington
1040d2d7ce28STrond Myklebust ida_destroy(&server->lockowner_id);
10419157c31dSTrond Myklebust ida_destroy(&server->openowner_id);
10421a58e8a0STrond Myklebust put_cred(server->cred);
104354ceac45SDavid Howells nfs_release_automount_timer();
1044c1b967d0SAl Viro call_rcu(&server->rcu, delayed_free);
104554ceac45SDavid Howells }
104689d77c8fSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_free_server);
104754ceac45SDavid Howells
104854ceac45SDavid Howells /*
104954ceac45SDavid Howells * Create a version 2 or 3 volume record
105054ceac45SDavid Howells * - keyed on server and FSID
105154ceac45SDavid Howells */
nfs_create_server(struct fs_context * fc)105262a55d08SScott Mayhew struct nfs_server *nfs_create_server(struct fs_context *fc)
105354ceac45SDavid Howells {
105462a55d08SScott Mayhew struct nfs_fs_context *ctx = nfs_fc2context(fc);
105554ceac45SDavid Howells struct nfs_server *server;
1056fbca779aSTrond Myklebust struct nfs_fattr *fattr;
105754ceac45SDavid Howells int error;
105854ceac45SDavid Howells
105954ceac45SDavid Howells server = nfs_alloc_server();
106054ceac45SDavid Howells if (!server)
106154ceac45SDavid Howells return ERR_PTR(-ENOMEM);
106254ceac45SDavid Howells
1063d18a9d3fSSargun Dhillon server->cred = get_cred(fc->cred);
10641a58e8a0STrond Myklebust
1065fbca779aSTrond Myklebust error = -ENOMEM;
1066fbca779aSTrond Myklebust fattr = nfs_alloc_fattr();
1067fbca779aSTrond Myklebust if (fattr == NULL)
1068fbca779aSTrond Myklebust goto error;
1069fbca779aSTrond Myklebust
107054ceac45SDavid Howells /* Get a client representation */
107162a55d08SScott Mayhew error = nfs_init_server(server, fc);
107254ceac45SDavid Howells if (error < 0)
107354ceac45SDavid Howells goto error;
107454ceac45SDavid Howells
107554ceac45SDavid Howells /* Probe the root fh to retrieve its FSID */
107662a55d08SScott Mayhew error = nfs_probe_fsinfo(server, ctx->mntfh, fattr);
107754ceac45SDavid Howells if (error < 0)
107854ceac45SDavid Howells goto error;
107954af3bb5STrond Myklebust if (server->nfs_client->rpc_ops->version == 3) {
108054af3bb5STrond Myklebust if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
108154af3bb5STrond Myklebust server->namelen = NFS3_MAXNAMLEN;
108262a55d08SScott Mayhew if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS))
108354af3bb5STrond Myklebust server->caps |= NFS_CAP_READDIRPLUS;
108454af3bb5STrond Myklebust } else {
108554af3bb5STrond Myklebust if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
108654af3bb5STrond Myklebust server->namelen = NFS2_MAXNAMLEN;
108754af3bb5STrond Myklebust }
108854af3bb5STrond Myklebust
1089fbca779aSTrond Myklebust if (!(fattr->valid & NFS_ATTR_FATTR)) {
109062a55d08SScott Mayhew error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh,
10912ef61e0eSAnna Schumaker fattr, NULL);
109254ceac45SDavid Howells if (error < 0) {
109354ceac45SDavid Howells dprintk("nfs_create_server: getattr error = %d\n", -error);
109454ceac45SDavid Howells goto error;
109554ceac45SDavid Howells }
109654ceac45SDavid Howells }
1097fbca779aSTrond Myklebust memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
109854ceac45SDavid Howells
10996daabf1bSDavid Howells dprintk("Server FSID: %llx:%llx\n",
11006daabf1bSDavid Howells (unsigned long long) server->fsid.major,
11016daabf1bSDavid Howells (unsigned long long) server->fsid.minor);
110254ceac45SDavid Howells
1103fca5238eSChuck Lever nfs_server_insert_lists(server);
110454ceac45SDavid Howells server->mount_time = jiffies;
1105fbca779aSTrond Myklebust nfs_free_fattr(fattr);
110654ceac45SDavid Howells return server;
110754ceac45SDavid Howells
110854ceac45SDavid Howells error:
1109fbca779aSTrond Myklebust nfs_free_fattr(fattr);
111054ceac45SDavid Howells nfs_free_server(server);
111154ceac45SDavid Howells return ERR_PTR(error);
111254ceac45SDavid Howells }
1113ddda8e0aSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_create_server);
111454ceac45SDavid Howells
111554ceac45SDavid Howells /*
111654ceac45SDavid Howells * Clone an NFS2, NFS3 or NFS4 server record
111754ceac45SDavid Howells */
nfs_clone_server(struct nfs_server * source,struct nfs_fh * fh,struct nfs_fattr * fattr,rpc_authflavor_t flavor)111854ceac45SDavid Howells struct nfs_server *nfs_clone_server(struct nfs_server *source,
111954ceac45SDavid Howells struct nfs_fh *fh,
11207e6eb683SBryan Schumaker struct nfs_fattr *fattr,
11217e6eb683SBryan Schumaker rpc_authflavor_t flavor)
112254ceac45SDavid Howells {
112354ceac45SDavid Howells struct nfs_server *server;
112454ceac45SDavid Howells int error;
112554ceac45SDavid Howells
112654ceac45SDavid Howells server = nfs_alloc_server();
112754ceac45SDavid Howells if (!server)
112854ceac45SDavid Howells return ERR_PTR(-ENOMEM);
112954ceac45SDavid Howells
11301a58e8a0STrond Myklebust server->cred = get_cred(source->cred);
11311a58e8a0STrond Myklebust
113254ceac45SDavid Howells /* Copy data from the source */
113354ceac45SDavid Howells server->nfs_client = source->nfs_client;
11340aaaf5c4SChuck Lever server->destroy = source->destroy;
1135212bf41dSElena Reshetova refcount_inc(&server->nfs_client->cl_count);
113654ceac45SDavid Howells nfs_server_copy_userdata(server, source);
113754ceac45SDavid Howells
113854ceac45SDavid Howells server->fsid = fattr->fsid;
113954ceac45SDavid Howells
11401c725118SBenjamin Coddington nfs_sysfs_add_server(server);
11411c725118SBenjamin Coddington
1142e13b5493SBenjamin Coddington nfs_sysfs_link_rpc_client(server,
1143e13b5493SBenjamin Coddington server->nfs_client->cl_rpcclient, "_state");
1144e13b5493SBenjamin Coddington
114533170233STrond Myklebust error = nfs_init_server_rpcclient(server,
114633170233STrond Myklebust source->client->cl_timeout,
11477e6eb683SBryan Schumaker flavor);
114854ceac45SDavid Howells if (error < 0)
114954ceac45SDavid Howells goto out_free_server;
115054ceac45SDavid Howells
115154ceac45SDavid Howells /* probe the filesystem info for this server filesystem */
11524d4cf8d2SAnna Schumaker error = nfs_probe_server(server, fh);
115354ceac45SDavid Howells if (error < 0)
115454ceac45SDavid Howells goto out_free_server;
115554ceac45SDavid Howells
115654af3bb5STrond Myklebust if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
115754af3bb5STrond Myklebust server->namelen = NFS4_MAXNAMLEN;
115854af3bb5STrond Myklebust
115954ceac45SDavid Howells error = nfs_start_lockd(server);
116054ceac45SDavid Howells if (error < 0)
116154ceac45SDavid Howells goto out_free_server;
116254ceac45SDavid Howells
1163fca5238eSChuck Lever nfs_server_insert_lists(server);
116454ceac45SDavid Howells server->mount_time = jiffies;
116554ceac45SDavid Howells
116654ceac45SDavid Howells return server;
116754ceac45SDavid Howells
116854ceac45SDavid Howells out_free_server:
116954ceac45SDavid Howells nfs_free_server(server);
117054ceac45SDavid Howells return ERR_PTR(error);
117154ceac45SDavid Howells }
1172ddda8e0aSBryan Schumaker EXPORT_SYMBOL_GPL(nfs_clone_server);
11736aaca566SDavid Howells
nfs_clients_init(struct net * net)11746b13168bSStanislav Kinsbursky void nfs_clients_init(struct net *net)
11756b13168bSStanislav Kinsbursky {
11766b13168bSStanislav Kinsbursky struct nfs_net *nn = net_generic(net, nfs_net_id);
11776b13168bSStanislav Kinsbursky
11786b13168bSStanislav Kinsbursky INIT_LIST_HEAD(&nn->nfs_client_list);
1179c25d32b2SStanislav Kinsbursky INIT_LIST_HEAD(&nn->nfs_volume_list);
118089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
118128cd1b3fSStanislav Kinsbursky idr_init(&nn->cb_ident_idr);
118228cd1b3fSStanislav Kinsbursky #endif
11834c03ae4aSTrond Myklebust spin_lock_init(&nn->nfs_client_lock);
11842f86e091SDeepa Dinamani nn->boot_time = ktime_get_real();
11851548036eSJosef Bacik memset(&nn->rpcstats, 0, sizeof(nn->rpcstats));
11861548036eSJosef Bacik nn->rpcstats.program = &nfs_program;
1187bf11fbdbSTrond Myklebust
1188bf11fbdbSTrond Myklebust nfs_netns_sysfs_setup(nn, net);
11896b13168bSStanislav Kinsbursky }
11906b13168bSStanislav Kinsbursky
nfs_clients_exit(struct net * net)119110b7a70cSTrond Myklebust void nfs_clients_exit(struct net *net)
119210b7a70cSTrond Myklebust {
119310b7a70cSTrond Myklebust struct nfs_net *nn = net_generic(net, nfs_net_id);
119410b7a70cSTrond Myklebust
1195bf11fbdbSTrond Myklebust nfs_netns_sysfs_destroy(nn);
119610b7a70cSTrond Myklebust nfs_cleanup_cb_ident_idr(net);
119710b7a70cSTrond Myklebust WARN_ON_ONCE(!list_empty(&nn->nfs_client_list));
119810b7a70cSTrond Myklebust WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list));
119910b7a70cSTrond Myklebust }
120010b7a70cSTrond Myklebust
12016aaca566SDavid Howells #ifdef CONFIG_PROC_FS
12026aaca566SDavid Howells static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
12036aaca566SDavid Howells static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
12046aaca566SDavid Howells static void nfs_server_list_stop(struct seq_file *p, void *v);
12056aaca566SDavid Howells static int nfs_server_list_show(struct seq_file *m, void *v);
12066aaca566SDavid Howells
120788e9d34cSJames Morris static const struct seq_operations nfs_server_list_ops = {
12086aaca566SDavid Howells .start = nfs_server_list_start,
12096aaca566SDavid Howells .next = nfs_server_list_next,
12106aaca566SDavid Howells .stop = nfs_server_list_stop,
12116aaca566SDavid Howells .show = nfs_server_list_show,
12126aaca566SDavid Howells };
12136aaca566SDavid Howells
12146aaca566SDavid Howells static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
12156aaca566SDavid Howells static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
12166aaca566SDavid Howells static void nfs_volume_list_stop(struct seq_file *p, void *v);
12176aaca566SDavid Howells static int nfs_volume_list_show(struct seq_file *m, void *v);
12186aaca566SDavid Howells
121988e9d34cSJames Morris static const struct seq_operations nfs_volume_list_ops = {
12206aaca566SDavid Howells .start = nfs_volume_list_start,
12216aaca566SDavid Howells .next = nfs_volume_list_next,
12226aaca566SDavid Howells .stop = nfs_volume_list_stop,
12236aaca566SDavid Howells .show = nfs_volume_list_show,
12246aaca566SDavid Howells };
12256aaca566SDavid Howells
12266aaca566SDavid Howells /*
12276aaca566SDavid Howells * set up the iterator to start reading from the server list and return the first item
12286aaca566SDavid Howells */
nfs_server_list_start(struct seq_file * m,loff_t * _pos)12296aaca566SDavid Howells static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
12308d11620eSJeff Layton __acquires(&nn->nfs_client_lock)
12316aaca566SDavid Howells {
123265b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
12336b13168bSStanislav Kinsbursky
12346aaca566SDavid Howells /* lock the list against modification */
1235dc030858SStanislav Kinsbursky spin_lock(&nn->nfs_client_lock);
12366b13168bSStanislav Kinsbursky return seq_list_start_head(&nn->nfs_client_list, *_pos);
12376aaca566SDavid Howells }
12386aaca566SDavid Howells
12396aaca566SDavid Howells /*
12406aaca566SDavid Howells * move to next server
12416aaca566SDavid Howells */
nfs_server_list_next(struct seq_file * p,void * v,loff_t * pos)12426aaca566SDavid Howells static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
12436aaca566SDavid Howells {
124465b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
12456b13168bSStanislav Kinsbursky
12466b13168bSStanislav Kinsbursky return seq_list_next(v, &nn->nfs_client_list, pos);
12476aaca566SDavid Howells }
12486aaca566SDavid Howells
12496aaca566SDavid Howells /*
12506aaca566SDavid Howells * clean up after reading from the transports list
12516aaca566SDavid Howells */
nfs_server_list_stop(struct seq_file * p,void * v)12526aaca566SDavid Howells static void nfs_server_list_stop(struct seq_file *p, void *v)
12538d11620eSJeff Layton __releases(&nn->nfs_client_lock)
12546aaca566SDavid Howells {
125565b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1256dc030858SStanislav Kinsbursky
1257dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
12586aaca566SDavid Howells }
12596aaca566SDavid Howells
12606aaca566SDavid Howells /*
12616aaca566SDavid Howells * display a header line followed by a load of call lines
12626aaca566SDavid Howells */
nfs_server_list_show(struct seq_file * m,void * v)12636aaca566SDavid Howells static int nfs_server_list_show(struct seq_file *m, void *v)
12646aaca566SDavid Howells {
12656aaca566SDavid Howells struct nfs_client *clp;
126665b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
12676aaca566SDavid Howells
12686aaca566SDavid Howells /* display header on line 1 */
12696b13168bSStanislav Kinsbursky if (v == &nn->nfs_client_list) {
12706aaca566SDavid Howells seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
12716aaca566SDavid Howells return 0;
12726aaca566SDavid Howells }
12736aaca566SDavid Howells
12746aaca566SDavid Howells /* display one transport per line on subsequent lines */
12756aaca566SDavid Howells clp = list_entry(v, struct nfs_client, cl_share_link);
12766aaca566SDavid Howells
1277940aab49SMalahal Naineni /* Check if the client is initialized */
1278940aab49SMalahal Naineni if (clp->cl_cons_state != NFS_CS_READY)
1279940aab49SMalahal Naineni return 0;
1280940aab49SMalahal Naineni
12812446ab60STrond Myklebust rcu_read_lock();
12825d8515caSChuck Lever seq_printf(m, "v%u %s %s %3d %s\n",
128340c55319STrond Myklebust clp->rpc_ops->version,
12845d8515caSChuck Lever rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
12855d8515caSChuck Lever rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1286212bf41dSElena Reshetova refcount_read(&clp->cl_count),
12876aaca566SDavid Howells clp->cl_hostname);
12882446ab60STrond Myklebust rcu_read_unlock();
12896aaca566SDavid Howells
12906aaca566SDavid Howells return 0;
12916aaca566SDavid Howells }
12926aaca566SDavid Howells
12936aaca566SDavid Howells /*
12946aaca566SDavid Howells * set up the iterator to start reading from the volume list and return the first item
12956aaca566SDavid Howells */
nfs_volume_list_start(struct seq_file * m,loff_t * _pos)12966aaca566SDavid Howells static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
12978d11620eSJeff Layton __acquires(&nn->nfs_client_lock)
12986aaca566SDavid Howells {
129965b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
1300c25d32b2SStanislav Kinsbursky
13016aaca566SDavid Howells /* lock the list against modification */
1302dc030858SStanislav Kinsbursky spin_lock(&nn->nfs_client_lock);
1303c25d32b2SStanislav Kinsbursky return seq_list_start_head(&nn->nfs_volume_list, *_pos);
13046aaca566SDavid Howells }
13056aaca566SDavid Howells
13066aaca566SDavid Howells /*
13076aaca566SDavid Howells * move to next volume
13086aaca566SDavid Howells */
nfs_volume_list_next(struct seq_file * p,void * v,loff_t * pos)13096aaca566SDavid Howells static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
13106aaca566SDavid Howells {
131165b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1312c25d32b2SStanislav Kinsbursky
1313c25d32b2SStanislav Kinsbursky return seq_list_next(v, &nn->nfs_volume_list, pos);
13146aaca566SDavid Howells }
13156aaca566SDavid Howells
13166aaca566SDavid Howells /*
13176aaca566SDavid Howells * clean up after reading from the transports list
13186aaca566SDavid Howells */
nfs_volume_list_stop(struct seq_file * p,void * v)13196aaca566SDavid Howells static void nfs_volume_list_stop(struct seq_file *p, void *v)
13208d11620eSJeff Layton __releases(&nn->nfs_client_lock)
13216aaca566SDavid Howells {
132265b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1323dc030858SStanislav Kinsbursky
1324dc030858SStanislav Kinsbursky spin_unlock(&nn->nfs_client_lock);
13256aaca566SDavid Howells }
13266aaca566SDavid Howells
13276aaca566SDavid Howells /*
13286aaca566SDavid Howells * display a header line followed by a load of call lines
13296aaca566SDavid Howells */
nfs_volume_list_show(struct seq_file * m,void * v)13306aaca566SDavid Howells static int nfs_volume_list_show(struct seq_file *m, void *v)
13316aaca566SDavid Howells {
13326aaca566SDavid Howells struct nfs_server *server;
13336aaca566SDavid Howells struct nfs_client *clp;
1334df05a49fSKinglong Mee char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0'
1335df05a49fSKinglong Mee char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0'
133665b38851SEric W. Biederman struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
13376aaca566SDavid Howells
13386aaca566SDavid Howells /* display header on line 1 */
1339c25d32b2SStanislav Kinsbursky if (v == &nn->nfs_volume_list) {
1340df05a49fSKinglong Mee seq_puts(m, "NV SERVER PORT DEV FSID"
1341df05a49fSKinglong Mee " FSC\n");
13426aaca566SDavid Howells return 0;
13436aaca566SDavid Howells }
13446aaca566SDavid Howells /* display one transport per line on subsequent lines */
13456aaca566SDavid Howells server = list_entry(v, struct nfs_server, master_link);
13466aaca566SDavid Howells clp = server->nfs_client;
13476aaca566SDavid Howells
1348df05a49fSKinglong Mee snprintf(dev, sizeof(dev), "%u:%u",
13496aaca566SDavid Howells MAJOR(server->s_dev), MINOR(server->s_dev));
13506aaca566SDavid Howells
1351df05a49fSKinglong Mee snprintf(fsid, sizeof(fsid), "%llx:%llx",
13526daabf1bSDavid Howells (unsigned long long) server->fsid.major,
13536daabf1bSDavid Howells (unsigned long long) server->fsid.minor);
13546aaca566SDavid Howells
13552446ab60STrond Myklebust rcu_read_lock();
1356df05a49fSKinglong Mee seq_printf(m, "v%u %s %s %-12s %-33s %s\n",
135740c55319STrond Myklebust clp->rpc_ops->version,
13585d8515caSChuck Lever rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
13595d8515caSChuck Lever rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
13606aaca566SDavid Howells dev,
13615d1acff1SDavid Howells fsid,
13625d1acff1SDavid Howells nfs_server_fscache_state(server));
13632446ab60STrond Myklebust rcu_read_unlock();
13646aaca566SDavid Howells
13656aaca566SDavid Howells return 0;
13666aaca566SDavid Howells }
13676aaca566SDavid Howells
nfs_fs_proc_net_init(struct net * net)136865b38851SEric W. Biederman int nfs_fs_proc_net_init(struct net *net)
136965b38851SEric W. Biederman {
137065b38851SEric W. Biederman struct nfs_net *nn = net_generic(net, nfs_net_id);
137165b38851SEric W. Biederman struct proc_dir_entry *p;
137265b38851SEric W. Biederman
137365b38851SEric W. Biederman nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net);
137465b38851SEric W. Biederman if (!nn->proc_nfsfs)
137565b38851SEric W. Biederman goto error_0;
137665b38851SEric W. Biederman
137765b38851SEric W. Biederman /* a file of servers with which we're dealing */
1378c3506372SChristoph Hellwig p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs,
1379c3506372SChristoph Hellwig &nfs_server_list_ops, sizeof(struct seq_net_private));
138065b38851SEric W. Biederman if (!p)
138165b38851SEric W. Biederman goto error_1;
138265b38851SEric W. Biederman
138365b38851SEric W. Biederman /* a file of volumes that we have mounted */
1384c3506372SChristoph Hellwig p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs,
1385c3506372SChristoph Hellwig &nfs_volume_list_ops, sizeof(struct seq_net_private));
138665b38851SEric W. Biederman if (!p)
138721e81002SCong Wang goto error_1;
138865b38851SEric W. Biederman return 0;
138965b38851SEric W. Biederman
139065b38851SEric W. Biederman error_1:
139121e81002SCong Wang remove_proc_subtree("nfsfs", net->proc_net);
139265b38851SEric W. Biederman error_0:
139365b38851SEric W. Biederman return -ENOMEM;
139465b38851SEric W. Biederman }
139565b38851SEric W. Biederman
nfs_fs_proc_net_exit(struct net * net)139665b38851SEric W. Biederman void nfs_fs_proc_net_exit(struct net *net)
139765b38851SEric W. Biederman {
139821e81002SCong Wang remove_proc_subtree("nfsfs", net->proc_net);
139965b38851SEric W. Biederman }
140065b38851SEric W. Biederman
14016aaca566SDavid Howells /*
14026aaca566SDavid Howells * initialise the /proc/fs/nfsfs/ directory
14036aaca566SDavid Howells */
nfs_fs_proc_init(void)14046aaca566SDavid Howells int __init nfs_fs_proc_init(void)
14056aaca566SDavid Howells {
14066a062a36SKinglong Mee if (!proc_mkdir("fs/nfsfs", NULL))
14076aaca566SDavid Howells goto error_0;
14086aaca566SDavid Howells
14096aaca566SDavid Howells /* a file of servers with which we're dealing */
14106a062a36SKinglong Mee if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers"))
14116aaca566SDavid Howells goto error_1;
14126aaca566SDavid Howells
14136aaca566SDavid Howells /* a file of volumes that we have mounted */
14146a062a36SKinglong Mee if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes"))
14156a062a36SKinglong Mee goto error_1;
14166aaca566SDavid Howells
14176a062a36SKinglong Mee return 0;
14186aaca566SDavid Howells error_1:
14196a062a36SKinglong Mee remove_proc_subtree("fs/nfsfs", NULL);
14206aaca566SDavid Howells error_0:
14216aaca566SDavid Howells return -ENOMEM;
14226aaca566SDavid Howells }
14236aaca566SDavid Howells
14246aaca566SDavid Howells /*
14256aaca566SDavid Howells * clean up the /proc/fs/nfsfs/ directory
14266aaca566SDavid Howells */
nfs_fs_proc_exit(void)14276aaca566SDavid Howells void nfs_fs_proc_exit(void)
14286aaca566SDavid Howells {
14296a062a36SKinglong Mee remove_proc_subtree("fs/nfsfs", NULL);
14301c725118SBenjamin Coddington ida_destroy(&s_sysfs_ids);
14316aaca566SDavid Howells }
14326aaca566SDavid Howells
14336aaca566SDavid Howells #endif /* CONFIG_PROC_FS */
1434