2 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
3 * Written by David Howells (dhowells@redhat.com)
5 #include <linux/module.h>
6 #include <linux/nfs_fs.h>
7 #include <linux/nfs_idmap.h>
8 #include <linux/nfs_mount.h>
9 #include <linux/sunrpc/addr.h>
10 #include <linux/sunrpc/auth.h>
11 #include <linux/sunrpc/xprt.h>
12 #include <linux/sunrpc/bc_xprt.h>
15 #include "delegation.h"
16 #include "nfs4session.h"
20 #define NFSDBG_FACILITY NFSDBG_CLIENT
23 * Get a unique NFSv4.0 callback identifier which will be used
24 * by the V4.0 callback service to lookup the nfs_client struct
26 static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
29 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
31 if (clp->rpc_ops->version != 4 || minorversion != 0)
33 idr_preload(GFP_KERNEL);
34 spin_lock(&nn->nfs_client_lock);
35 ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT);
37 clp->cl_cb_ident = ret;
38 spin_unlock(&nn->nfs_client_lock);
40 return ret < 0 ? ret : 0;
43 #ifdef CONFIG_NFS_V4_1
45 * Per auth flavor data server rpc clients
47 struct nfs4_ds_server {
48 struct list_head list; /* ds_clp->cl_ds_clients */
49 struct rpc_clnt *rpc_clnt;
53 * Common lookup case for DS I/O
55 static struct nfs4_ds_server *
56 nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor)
58 struct nfs4_ds_server *dss;
61 list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) {
62 if (dss->rpc_clnt->cl_auth->au_flavor != flavor)
72 static struct nfs4_ds_server *
73 nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor,
74 struct nfs4_ds_server *new)
76 struct nfs4_ds_server *dss;
78 spin_lock(&ds_clp->cl_lock);
79 list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) {
80 if (dss->rpc_clnt->cl_auth->au_flavor != flavor)
85 list_add_rcu(&new->list, &ds_clp->cl_ds_clients);
88 spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */
92 static struct nfs4_ds_server *
93 nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor)
95 struct nfs4_ds_server *dss;
97 dss = kmalloc(sizeof(*dss), GFP_NOFS);
99 return ERR_PTR(-ENOMEM);
101 dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor);
102 if (IS_ERR(dss->rpc_clnt)) {
103 int err = PTR_ERR(dss->rpc_clnt);
107 INIT_LIST_HEAD(&dss->list);
113 nfs4_free_ds_server(struct nfs4_ds_server *dss)
115 rpc_release_client(dss->rpc_clnt);
120 * Find or create a DS rpc client with th MDS server rpc client auth flavor
121 * in the nfs_client cl_ds_clients list.
124 nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode)
126 struct nfs4_ds_server *dss, *new;
127 rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor;
129 dss = nfs4_find_ds_client(ds_clp, flavor);
132 new = nfs4_alloc_ds_server(ds_clp, flavor);
134 return ERR_CAST(new);
135 dss = nfs4_add_ds_client(ds_clp, flavor, new);
137 nfs4_free_ds_server(new);
139 return dss->rpc_clnt;
141 EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client);
144 nfs4_shutdown_ds_clients(struct nfs_client *clp)
146 struct nfs4_ds_server *dss;
147 LIST_HEAD(shutdown_list);
149 while (!list_empty(&clp->cl_ds_clients)) {
150 dss = list_entry(clp->cl_ds_clients.next,
151 struct nfs4_ds_server, list);
152 list_del(&dss->list);
153 rpc_shutdown_client(dss->rpc_clnt);
158 void nfs41_shutdown_client(struct nfs_client *clp)
160 if (nfs4_has_session(clp)) {
161 nfs4_shutdown_ds_clients(clp);
162 nfs4_destroy_session(clp->cl_session);
163 nfs4_destroy_clientid(clp);
167 #endif /* CONFIG_NFS_V4_1 */
169 void nfs40_shutdown_client(struct nfs_client *clp)
171 if (clp->cl_slot_tbl) {
172 nfs4_release_slot_table(clp->cl_slot_tbl);
173 kfree(clp->cl_slot_tbl);
177 struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
180 struct nfs_client *clp = nfs_alloc_client(cl_init);
184 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
188 if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) {
193 spin_lock_init(&clp->cl_lock);
194 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
195 INIT_LIST_HEAD(&clp->cl_ds_clients);
196 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
197 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
198 clp->cl_minorversion = cl_init->minorversion;
199 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
203 nfs_free_client(clp);
208 * Destroy the NFS4 callback service
210 static void nfs4_destroy_callback(struct nfs_client *clp)
212 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
213 nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net);
216 static void nfs4_shutdown_client(struct nfs_client *clp)
218 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
219 nfs4_kill_renewd(clp);
220 clp->cl_mvops->shutdown_client(clp);
221 nfs4_destroy_callback(clp);
222 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
223 nfs_idmap_delete(clp);
225 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
226 kfree(clp->cl_serverowner);
227 kfree(clp->cl_serverscope);
228 kfree(clp->cl_implid);
231 void nfs4_free_client(struct nfs_client *clp)
233 nfs4_shutdown_client(clp);
234 nfs_free_client(clp);
238 * Initialize the NFS4 callback service
240 static int nfs4_init_callback(struct nfs_client *clp)
244 if (clp->rpc_ops->version == 4) {
245 struct rpc_xprt *xprt;
247 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
249 if (nfs4_has_session(clp)) {
250 error = xprt_setup_backchannel(xprt,
251 NFS41_BC_MIN_CALLBACKS);
256 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
258 dprintk("%s: failed to start callback. Error = %d\n",
262 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
268 * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
269 * @clp - nfs_client to initialize
271 * Returns zero on success, or a negative errno if some error occurred.
273 int nfs40_init_client(struct nfs_client *clp)
275 struct nfs4_slot_table *tbl;
278 tbl = kzalloc(sizeof(*tbl), GFP_NOFS);
282 ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE,
283 "NFSv4.0 transport Slot table");
289 clp->cl_slot_tbl = tbl;
293 #if defined(CONFIG_NFS_V4_1)
296 * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
297 * @clp - nfs_client to initialize
299 * Returns zero on success, or a negative errno if some error occurred.
301 int nfs41_init_client(struct nfs_client *clp)
303 struct nfs4_session *session = NULL;
306 * Create the session and mark it expired.
307 * When a SEQUENCE operation encounters the expired session
308 * it will do session recovery to initialize it.
310 session = nfs4_alloc_session(clp);
314 clp->cl_session = session;
317 * The create session reply races with the server back
318 * channel probe. Mark the client NFS_CS_SESSION_INITING
319 * so that the client back channel can find the
322 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
326 #endif /* CONFIG_NFS_V4_1 */
329 * Initialize the minor version specific parts of an NFS4 client record
331 static int nfs4_init_client_minor_version(struct nfs_client *clp)
335 ret = clp->cl_mvops->init_client(clp);
338 return nfs4_init_callback(clp);
342 * nfs4_init_client - Initialise an NFS4 client record
344 * @clp: nfs_client to initialise
345 * @timeparms: timeout parameters for underlying RPC transport
346 * @ip_addr: callback IP address in presentation format
347 * @authflavor: authentication flavor for underlying RPC transport
349 * Returns pointer to an NFS client, or an ERR_PTR value.
351 struct nfs_client *nfs4_init_client(struct nfs_client *clp,
352 const struct rpc_timeout *timeparms,
355 char buf[INET6_ADDRSTRLEN + 1];
356 struct nfs_client *old;
359 if (clp->cl_cons_state == NFS_CS_READY) {
360 /* the client is initialised already */
361 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
365 /* Check NFS protocol revision and initialize RPC op vector */
366 clp->rpc_ops = &nfs_v4_clientops;
368 if (clp->cl_minorversion != 0)
369 __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags);
370 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
371 __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags);
372 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
373 if (error == -EINVAL)
374 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
378 /* If no clientaddr= option was specified, find a usable cb address */
379 if (ip_addr == NULL) {
380 struct sockaddr_storage cb_addr;
381 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
383 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
386 error = rpc_ntop(sap, buf, sizeof(buf));
389 ip_addr = (const char *)buf;
391 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
393 error = nfs_idmap_new(clp);
395 dprintk("%s: failed to create idmapper. Error = %d\n",
399 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
401 error = nfs4_init_client_minor_version(clp);
405 if (!nfs4_has_session(clp))
406 nfs_mark_client_ready(clp, NFS_CS_READY);
408 error = nfs4_discover_server_trunking(clp, &old);
413 clp->cl_preserve_clid = true;
420 nfs_mark_client_ready(clp, error);
422 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
423 return ERR_PTR(error);
427 * SETCLIENTID just did a callback update with the callback ident in
428 * "drop," but server trunking discovery claims "drop" and "keep" are
429 * actually the same server. Swap the callback IDs so that "keep"
430 * will continue to use the callback ident the server now knows about,
431 * and so that "keep"'s original callback ident is destroyed when
434 static void nfs4_swap_callback_idents(struct nfs_client *keep,
435 struct nfs_client *drop)
437 struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id);
438 unsigned int save = keep->cl_cb_ident;
440 if (keep->cl_cb_ident == drop->cl_cb_ident)
443 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
444 __func__, keep->cl_cb_ident, drop->cl_cb_ident);
446 spin_lock(&nn->nfs_client_lock);
448 idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident);
449 keep->cl_cb_ident = drop->cl_cb_ident;
451 idr_replace(&nn->cb_ident_idr, drop, save);
452 drop->cl_cb_ident = save;
454 spin_unlock(&nn->nfs_client_lock);
458 * nfs40_walk_client_list - Find server that recognizes a client ID
460 * @new: nfs_client with client ID to test
461 * @result: OUT: found nfs_client, or new
462 * @cred: credential to use for trunking test
464 * Returns zero, a negative errno, or a negative NFS4ERR status.
465 * If zero is returned, an nfs_client pointer is planted in "result."
467 * NB: nfs40_walk_client_list() relies on the new nfs_client being
468 * the last nfs_client on the list.
470 int nfs40_walk_client_list(struct nfs_client *new,
471 struct nfs_client **result,
472 struct rpc_cred *cred)
474 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
475 struct nfs_client *pos, *prev = NULL;
476 struct nfs4_setclientid_res clid = {
477 .clientid = new->cl_clientid,
478 .confirm = new->cl_confirm,
480 int status = -NFS4ERR_STALE_CLIENTID;
482 spin_lock(&nn->nfs_client_lock);
483 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
484 /* If "pos" isn't marked ready, we can't trust the
485 * remaining fields in "pos" */
486 if (pos->cl_cons_state > NFS_CS_READY) {
487 atomic_inc(&pos->cl_count);
488 spin_unlock(&nn->nfs_client_lock);
491 nfs_put_client(prev);
494 status = nfs_wait_client_init_complete(pos);
495 spin_lock(&nn->nfs_client_lock);
499 if (pos->cl_cons_state != NFS_CS_READY)
502 if (pos->rpc_ops != new->rpc_ops)
505 if (pos->cl_proto != new->cl_proto)
508 if (pos->cl_minorversion != new->cl_minorversion)
511 if (pos->cl_clientid != new->cl_clientid)
514 atomic_inc(&pos->cl_count);
515 spin_unlock(&nn->nfs_client_lock);
518 nfs_put_client(prev);
521 status = nfs4_proc_setclientid_confirm(pos, &clid, cred);
523 case -NFS4ERR_STALE_CLIENTID:
526 nfs4_swap_callback_idents(pos, new);
530 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
531 __func__, pos, atomic_read(&pos->cl_count));
536 spin_lock(&nn->nfs_client_lock);
538 spin_unlock(&nn->nfs_client_lock);
540 /* No match found. The server lost our clientid */
543 nfs_put_client(prev);
544 dprintk("NFS: <-- %s status = %d\n", __func__, status);
548 #ifdef CONFIG_NFS_V4_1
550 * Returns true if the client IDs match
552 static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b)
554 if (a->cl_clientid != b->cl_clientid) {
555 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
556 __func__, a->cl_clientid, b->cl_clientid);
559 dprintk("NFS: --> %s client ID %llx matches %llx\n",
560 __func__, a->cl_clientid, b->cl_clientid);
565 * Returns true if the server owners match
568 nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b)
570 struct nfs41_server_owner *o1 = a->cl_serverowner;
571 struct nfs41_server_owner *o2 = b->cl_serverowner;
573 if (o1->minor_id != o2->minor_id) {
574 dprintk("NFS: --> %s server owner minor IDs do not match\n",
579 if (o1->major_id_sz != o2->major_id_sz)
580 goto out_major_mismatch;
581 if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0)
582 goto out_major_mismatch;
584 dprintk("NFS: --> %s server owners match\n", __func__);
588 dprintk("NFS: --> %s server owner major IDs do not match\n",
594 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
596 * @new: nfs_client with client ID to test
597 * @result: OUT: found nfs_client, or new
598 * @cred: credential to use for trunking test
600 * Returns zero, a negative errno, or a negative NFS4ERR status.
601 * If zero is returned, an nfs_client pointer is planted in "result."
603 * NB: nfs41_walk_client_list() relies on the new nfs_client being
604 * the last nfs_client on the list.
606 int nfs41_walk_client_list(struct nfs_client *new,
607 struct nfs_client **result,
608 struct rpc_cred *cred)
610 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
611 struct nfs_client *pos, *prev = NULL;
612 int status = -NFS4ERR_STALE_CLIENTID;
614 spin_lock(&nn->nfs_client_lock);
615 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
616 /* If "pos" isn't marked ready, we can't trust the
617 * remaining fields in "pos", especially the client
618 * ID and serverowner fields. Wait for CREATE_SESSION
620 if (pos->cl_cons_state > NFS_CS_READY) {
621 atomic_inc(&pos->cl_count);
622 spin_unlock(&nn->nfs_client_lock);
625 nfs_put_client(prev);
628 status = nfs_wait_client_init_complete(pos);
630 nfs4_schedule_lease_recovery(pos);
631 status = nfs4_wait_clnt_recover(pos);
633 spin_lock(&nn->nfs_client_lock);
637 if (pos->cl_cons_state != NFS_CS_READY)
640 if (pos->rpc_ops != new->rpc_ops)
643 if (pos->cl_proto != new->cl_proto)
646 if (pos->cl_minorversion != new->cl_minorversion)
649 if (!nfs4_match_clientids(pos, new))
652 if (!nfs4_match_serverowners(pos, new))
655 atomic_inc(&pos->cl_count);
658 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
659 __func__, pos, atomic_read(&pos->cl_count));
663 /* No matching nfs_client found. */
664 spin_unlock(&nn->nfs_client_lock);
665 dprintk("NFS: <-- %s status = %d\n", __func__, status);
667 nfs_put_client(prev);
670 #endif /* CONFIG_NFS_V4_1 */
672 static void nfs4_destroy_server(struct nfs_server *server)
674 nfs_server_return_all_delegations(server);
675 unset_pnfs_layoutdriver(server);
676 nfs4_purge_state_owners(server);
680 * NFSv4.0 callback thread helper
682 * Find a client by callback identifier
685 nfs4_find_client_ident(struct net *net, int cb_ident)
687 struct nfs_client *clp;
688 struct nfs_net *nn = net_generic(net, nfs_net_id);
690 spin_lock(&nn->nfs_client_lock);
691 clp = idr_find(&nn->cb_ident_idr, cb_ident);
693 atomic_inc(&clp->cl_count);
694 spin_unlock(&nn->nfs_client_lock);
698 #if defined(CONFIG_NFS_V4_1)
699 /* Common match routine for v4.0 and v4.1 callback services */
700 static bool nfs4_cb_match_client(const struct sockaddr *addr,
701 struct nfs_client *clp, u32 minorversion)
703 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
705 /* Don't match clients that failed to initialise */
706 if (!(clp->cl_cons_state == NFS_CS_READY ||
707 clp->cl_cons_state == NFS_CS_SESSION_INITING))
712 /* Match the version and minorversion */
713 if (clp->rpc_ops->version != 4 ||
714 clp->cl_minorversion != minorversion)
717 /* Match only the IP address, not the port number */
718 if (!nfs_sockaddr_match_ipaddr(addr, clap))
725 * NFSv4.1 callback thread helper
726 * For CB_COMPOUND calls, find a client by IP address, protocol version,
727 * minorversion, and sessionID
729 * Returns NULL if no such client
732 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
733 struct nfs4_sessionid *sid, u32 minorversion)
735 struct nfs_client *clp;
736 struct nfs_net *nn = net_generic(net, nfs_net_id);
738 spin_lock(&nn->nfs_client_lock);
739 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
740 if (nfs4_cb_match_client(addr, clp, minorversion) == false)
743 if (!nfs4_has_session(clp))
747 if (memcmp(clp->cl_session->sess_id.data,
748 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
751 atomic_inc(&clp->cl_count);
752 spin_unlock(&nn->nfs_client_lock);
755 spin_unlock(&nn->nfs_client_lock);
759 #else /* CONFIG_NFS_V4_1 */
762 nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
763 struct nfs4_sessionid *sid, u32 minorversion)
767 #endif /* CONFIG_NFS_V4_1 */
770 * Set up an NFS4 client
772 static int nfs4_set_client(struct nfs_server *server,
773 const char *hostname,
774 const struct sockaddr *addr,
775 const size_t addrlen,
777 rpc_authflavor_t authflavour,
778 int proto, const struct rpc_timeout *timeparms,
779 u32 minorversion, struct net *net)
781 struct nfs_client_initdata cl_init = {
782 .hostname = hostname,
787 .minorversion = minorversion,
790 struct nfs_client *clp;
793 dprintk("--> nfs4_set_client()\n");
795 if (server->flags & NFS_MOUNT_NORESVPORT)
796 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
797 if (server->options & NFS_OPTION_MIGRATION)
798 set_bit(NFS_CS_MIGRATION, &cl_init.init_flags);
800 /* Allocate or find a client reference we can use */
801 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
803 error = PTR_ERR(clp);
808 * Query for the lease time on clientid setup or renewal
810 * Note that this will be set on nfs_clients that were created
811 * only for the DS role and did not set this bit, but now will
814 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
816 server->nfs_client = clp;
817 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
820 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
825 * Set up a pNFS Data Server client.
827 * Return any existing nfs_client that matches server address,port,version
830 * For a new nfs_client, use a soft mount (default), a low retrans and a
831 * low timeout interval so that if a connection is lost, we retry through
834 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
835 const struct sockaddr *ds_addr, int ds_addrlen,
836 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
838 struct nfs_client_initdata cl_init = {
840 .addrlen = ds_addrlen,
843 .minorversion = mds_clp->cl_minorversion,
844 .net = mds_clp->cl_net,
846 struct rpc_timeout ds_timeout;
847 struct nfs_client *clp;
850 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
851 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
852 * (section 13.1 RFC 5661).
854 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
855 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
856 mds_clp->cl_rpcclient->cl_auth->au_flavor);
858 dprintk("<-- %s %p\n", __func__, clp);
861 EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
864 * Session has been established, and the client marked ready.
865 * Set the mount rsize and wsize with negotiated fore channel
866 * attributes which will be bound checked in nfs_server_set_fsinfo.
868 static void nfs4_session_set_rwsize(struct nfs_server *server)
870 #ifdef CONFIG_NFS_V4_1
871 struct nfs4_session *sess;
875 if (!nfs4_has_session(server->nfs_client))
877 sess = server->nfs_client->cl_session;
878 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
879 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
881 if (server->rsize > server_resp_sz)
882 server->rsize = server_resp_sz;
883 if (server->wsize > server_rqst_sz)
884 server->wsize = server_rqst_sz;
885 #endif /* CONFIG_NFS_V4_1 */
888 static int nfs4_server_common_setup(struct nfs_server *server,
889 struct nfs_fh *mntfh, bool auth_probe)
891 struct nfs_fattr *fattr;
894 /* data servers support only a subset of NFSv4.1 */
895 if (is_ds_only_client(server->nfs_client))
896 return -EPROTONOSUPPORT;
898 fattr = nfs_alloc_fattr();
902 /* We must ensure the session is initialised first */
903 error = nfs4_init_session(server->nfs_client);
907 /* Set the basic capabilities */
908 server->caps |= server->nfs_client->cl_mvops->init_caps;
909 if (server->flags & NFS_MOUNT_NORDIRPLUS)
910 server->caps &= ~NFS_CAP_READDIRPLUS;
912 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
915 if (nfs4_disable_idmapping &&
916 server->client->cl_auth->au_flavor == RPC_AUTH_UNIX)
917 server->caps |= NFS_CAP_UIDGID_NOMAP;
920 /* Probe the root fh to retrieve its FSID and filehandle */
921 error = nfs4_get_rootfh(server, mntfh, auth_probe);
925 dprintk("Server FSID: %llx:%llx\n",
926 (unsigned long long) server->fsid.major,
927 (unsigned long long) server->fsid.minor);
928 dprintk("Mount FH: %d\n", mntfh->size);
930 nfs4_session_set_rwsize(server);
932 error = nfs_probe_fsinfo(server, mntfh, fattr);
936 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
937 server->namelen = NFS4_MAXNAMLEN;
939 nfs_server_insert_lists(server);
940 server->mount_time = jiffies;
941 server->destroy = nfs4_destroy_server;
943 nfs_free_fattr(fattr);
948 * Create a version 4 volume record
950 static int nfs4_init_server(struct nfs_server *server,
951 const struct nfs_parsed_mount_data *data)
953 rpc_authflavor_t pseudoflavor = RPC_AUTH_UNIX;
954 struct rpc_timeout timeparms;
957 dprintk("--> nfs4_init_server()\n");
959 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
960 data->timeo, data->retrans);
962 /* Initialise the client representation from the mount data */
963 server->flags = data->flags;
964 server->options = data->options;
966 if (data->auth_flavor_len >= 1)
967 pseudoflavor = data->auth_flavors[0];
969 /* Get a client record */
970 error = nfs4_set_client(server,
971 data->nfs_server.hostname,
972 (const struct sockaddr *)&data->nfs_server.address,
973 data->nfs_server.addrlen,
974 data->client_address,
976 data->nfs_server.protocol,
984 server->rsize = nfs_block_size(data->rsize, NULL);
986 server->wsize = nfs_block_size(data->wsize, NULL);
988 server->acregmin = data->acregmin * HZ;
989 server->acregmax = data->acregmax * HZ;
990 server->acdirmin = data->acdirmin * HZ;
991 server->acdirmax = data->acdirmax * HZ;
993 server->port = data->nfs_server.port;
995 error = nfs_init_server_rpcclient(server, &timeparms, pseudoflavor);
999 dprintk("<-- nfs4_init_server() = %d\n", error);
1004 * Create a version 4 volume record
1005 * - keyed on server and FSID
1007 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1008 struct nfs_fh *mntfh)*/
1009 struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
1010 struct nfs_subversion *nfs_mod)
1012 struct nfs_server *server;
1016 dprintk("--> nfs4_create_server()\n");
1018 server = nfs_alloc_server();
1020 return ERR_PTR(-ENOMEM);
1022 auth_probe = mount_info->parsed->auth_flavor_len < 1;
1024 /* set up the general RPC client */
1025 error = nfs4_init_server(server, mount_info->parsed);
1029 error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe);
1033 dprintk("<-- nfs4_create_server() = %p\n", server);
1037 nfs_free_server(server);
1038 dprintk("<-- nfs4_create_server() = error %d\n", error);
1039 return ERR_PTR(error);
1043 * Create an NFS4 referral server record
1045 struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
1046 struct nfs_fh *mntfh)
1048 struct nfs_client *parent_client;
1049 struct nfs_server *server, *parent_server;
1052 dprintk("--> nfs4_create_referral_server()\n");
1054 server = nfs_alloc_server();
1056 return ERR_PTR(-ENOMEM);
1058 parent_server = NFS_SB(data->sb);
1059 parent_client = parent_server->nfs_client;
1061 /* Initialise the client representation from the parent server */
1062 nfs_server_copy_userdata(server, parent_server);
1064 /* Get a client representation.
1065 * Note: NFSv4 always uses TCP, */
1066 error = nfs4_set_client(server, data->hostname,
1069 parent_client->cl_ipaddr,
1071 rpc_protocol(parent_server->client),
1072 parent_server->client->cl_timeout,
1073 parent_client->cl_mvops->minor_version,
1074 parent_client->cl_net);
1078 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
1082 error = nfs4_server_common_setup(server, mntfh,
1083 !(parent_server->flags & NFS_MOUNT_SECFLAVOUR));
1087 dprintk("<-- nfs_create_referral_server() = %p\n", server);
1091 nfs_free_server(server);
1092 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
1093 return ERR_PTR(error);