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 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_GSS_KRB5I
);
372 if (error
== -EINVAL
)
373 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
377 /* If no clientaddr= option was specified, find a usable cb address */
378 if (ip_addr
== NULL
) {
379 struct sockaddr_storage cb_addr
;
380 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
382 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
385 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
388 ip_addr
= (const char *)buf
;
390 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
392 error
= nfs_idmap_new(clp
);
394 dprintk("%s: failed to create idmapper. Error = %d\n",
398 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
400 error
= nfs4_init_client_minor_version(clp
);
404 if (!nfs4_has_session(clp
))
405 nfs_mark_client_ready(clp
, NFS_CS_READY
);
407 error
= nfs4_discover_server_trunking(clp
, &old
);
412 clp
->cl_preserve_clid
= true;
419 nfs_mark_client_ready(clp
, error
);
421 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
422 return ERR_PTR(error
);
426 * SETCLIENTID just did a callback update with the callback ident in
427 * "drop," but server trunking discovery claims "drop" and "keep" are
428 * actually the same server. Swap the callback IDs so that "keep"
429 * will continue to use the callback ident the server now knows about,
430 * and so that "keep"'s original callback ident is destroyed when
433 static void nfs4_swap_callback_idents(struct nfs_client
*keep
,
434 struct nfs_client
*drop
)
436 struct nfs_net
*nn
= net_generic(keep
->cl_net
, nfs_net_id
);
437 unsigned int save
= keep
->cl_cb_ident
;
439 if (keep
->cl_cb_ident
== drop
->cl_cb_ident
)
442 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
443 __func__
, keep
->cl_cb_ident
, drop
->cl_cb_ident
);
445 spin_lock(&nn
->nfs_client_lock
);
447 idr_replace(&nn
->cb_ident_idr
, keep
, drop
->cl_cb_ident
);
448 keep
->cl_cb_ident
= drop
->cl_cb_ident
;
450 idr_replace(&nn
->cb_ident_idr
, drop
, save
);
451 drop
->cl_cb_ident
= save
;
453 spin_unlock(&nn
->nfs_client_lock
);
457 * nfs40_walk_client_list - Find server that recognizes a client ID
459 * @new: nfs_client with client ID to test
460 * @result: OUT: found nfs_client, or new
461 * @cred: credential to use for trunking test
463 * Returns zero, a negative errno, or a negative NFS4ERR status.
464 * If zero is returned, an nfs_client pointer is planted in "result."
466 * NB: nfs40_walk_client_list() relies on the new nfs_client being
467 * the last nfs_client on the list.
469 int nfs40_walk_client_list(struct nfs_client
*new,
470 struct nfs_client
**result
,
471 struct rpc_cred
*cred
)
473 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
474 struct nfs_client
*pos
, *prev
= NULL
;
475 struct nfs4_setclientid_res clid
= {
476 .clientid
= new->cl_clientid
,
477 .confirm
= new->cl_confirm
,
479 int status
= -NFS4ERR_STALE_CLIENTID
;
481 spin_lock(&nn
->nfs_client_lock
);
482 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
483 /* If "pos" isn't marked ready, we can't trust the
484 * remaining fields in "pos" */
485 if (pos
->cl_cons_state
> NFS_CS_READY
) {
486 atomic_inc(&pos
->cl_count
);
487 spin_unlock(&nn
->nfs_client_lock
);
490 nfs_put_client(prev
);
493 status
= nfs_wait_client_init_complete(pos
);
494 spin_lock(&nn
->nfs_client_lock
);
498 if (pos
->cl_cons_state
!= NFS_CS_READY
)
501 if (pos
->rpc_ops
!= new->rpc_ops
)
504 if (pos
->cl_proto
!= new->cl_proto
)
507 if (pos
->cl_minorversion
!= new->cl_minorversion
)
510 if (pos
->cl_clientid
!= new->cl_clientid
)
513 atomic_inc(&pos
->cl_count
);
514 spin_unlock(&nn
->nfs_client_lock
);
517 nfs_put_client(prev
);
520 status
= nfs4_proc_setclientid_confirm(pos
, &clid
, cred
);
522 case -NFS4ERR_STALE_CLIENTID
:
525 nfs4_swap_callback_idents(pos
, new);
529 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
530 __func__
, pos
, atomic_read(&pos
->cl_count
));
535 spin_lock(&nn
->nfs_client_lock
);
537 spin_unlock(&nn
->nfs_client_lock
);
539 /* No match found. The server lost our clientid */
542 nfs_put_client(prev
);
543 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
547 #ifdef CONFIG_NFS_V4_1
549 * Returns true if the client IDs match
551 static bool nfs4_match_clientids(struct nfs_client
*a
, struct nfs_client
*b
)
553 if (a
->cl_clientid
!= b
->cl_clientid
) {
554 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
555 __func__
, a
->cl_clientid
, b
->cl_clientid
);
558 dprintk("NFS: --> %s client ID %llx matches %llx\n",
559 __func__
, a
->cl_clientid
, b
->cl_clientid
);
564 * Returns true if the server owners match
567 nfs4_match_serverowners(struct nfs_client
*a
, struct nfs_client
*b
)
569 struct nfs41_server_owner
*o1
= a
->cl_serverowner
;
570 struct nfs41_server_owner
*o2
= b
->cl_serverowner
;
572 if (o1
->minor_id
!= o2
->minor_id
) {
573 dprintk("NFS: --> %s server owner minor IDs do not match\n",
578 if (o1
->major_id_sz
!= o2
->major_id_sz
)
579 goto out_major_mismatch
;
580 if (memcmp(o1
->major_id
, o2
->major_id
, o1
->major_id_sz
) != 0)
581 goto out_major_mismatch
;
583 dprintk("NFS: --> %s server owners match\n", __func__
);
587 dprintk("NFS: --> %s server owner major IDs do not match\n",
593 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
595 * @new: nfs_client with client ID to test
596 * @result: OUT: found nfs_client, or new
597 * @cred: credential to use for trunking test
599 * Returns zero, a negative errno, or a negative NFS4ERR status.
600 * If zero is returned, an nfs_client pointer is planted in "result."
602 * NB: nfs41_walk_client_list() relies on the new nfs_client being
603 * the last nfs_client on the list.
605 int nfs41_walk_client_list(struct nfs_client
*new,
606 struct nfs_client
**result
,
607 struct rpc_cred
*cred
)
609 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
610 struct nfs_client
*pos
, *prev
= NULL
;
611 int status
= -NFS4ERR_STALE_CLIENTID
;
613 spin_lock(&nn
->nfs_client_lock
);
614 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
615 /* If "pos" isn't marked ready, we can't trust the
616 * remaining fields in "pos", especially the client
617 * ID and serverowner fields. Wait for CREATE_SESSION
619 if (pos
->cl_cons_state
> NFS_CS_READY
) {
620 atomic_inc(&pos
->cl_count
);
621 spin_unlock(&nn
->nfs_client_lock
);
624 nfs_put_client(prev
);
627 status
= nfs_wait_client_init_complete(pos
);
629 nfs4_schedule_lease_recovery(pos
);
630 status
= nfs4_wait_clnt_recover(pos
);
632 spin_lock(&nn
->nfs_client_lock
);
636 if (pos
->cl_cons_state
!= NFS_CS_READY
)
639 if (pos
->rpc_ops
!= new->rpc_ops
)
642 if (pos
->cl_proto
!= new->cl_proto
)
645 if (pos
->cl_minorversion
!= new->cl_minorversion
)
648 if (!nfs4_match_clientids(pos
, new))
651 if (!nfs4_match_serverowners(pos
, new))
654 atomic_inc(&pos
->cl_count
);
657 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
658 __func__
, pos
, atomic_read(&pos
->cl_count
));
662 /* No matching nfs_client found. */
663 spin_unlock(&nn
->nfs_client_lock
);
664 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
666 nfs_put_client(prev
);
669 #endif /* CONFIG_NFS_V4_1 */
671 static void nfs4_destroy_server(struct nfs_server
*server
)
673 nfs_server_return_all_delegations(server
);
674 unset_pnfs_layoutdriver(server
);
675 nfs4_purge_state_owners(server
);
679 * NFSv4.0 callback thread helper
681 * Find a client by callback identifier
684 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
686 struct nfs_client
*clp
;
687 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
689 spin_lock(&nn
->nfs_client_lock
);
690 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
692 atomic_inc(&clp
->cl_count
);
693 spin_unlock(&nn
->nfs_client_lock
);
697 #if defined(CONFIG_NFS_V4_1)
698 /* Common match routine for v4.0 and v4.1 callback services */
699 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
700 struct nfs_client
*clp
, u32 minorversion
)
702 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
704 /* Don't match clients that failed to initialise */
705 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
706 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
711 /* Match the version and minorversion */
712 if (clp
->rpc_ops
->version
!= 4 ||
713 clp
->cl_minorversion
!= minorversion
)
716 /* Match only the IP address, not the port number */
717 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
724 * NFSv4.1 callback thread helper
725 * For CB_COMPOUND calls, find a client by IP address, protocol version,
726 * minorversion, and sessionID
728 * Returns NULL if no such client
731 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
732 struct nfs4_sessionid
*sid
, u32 minorversion
)
734 struct nfs_client
*clp
;
735 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
737 spin_lock(&nn
->nfs_client_lock
);
738 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
739 if (nfs4_cb_match_client(addr
, clp
, minorversion
) == false)
742 if (!nfs4_has_session(clp
))
746 if (memcmp(clp
->cl_session
->sess_id
.data
,
747 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
750 atomic_inc(&clp
->cl_count
);
751 spin_unlock(&nn
->nfs_client_lock
);
754 spin_unlock(&nn
->nfs_client_lock
);
758 #else /* CONFIG_NFS_V4_1 */
761 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
762 struct nfs4_sessionid
*sid
, u32 minorversion
)
766 #endif /* CONFIG_NFS_V4_1 */
769 * Set up an NFS4 client
771 static int nfs4_set_client(struct nfs_server
*server
,
772 const char *hostname
,
773 const struct sockaddr
*addr
,
774 const size_t addrlen
,
776 rpc_authflavor_t authflavour
,
777 int proto
, const struct rpc_timeout
*timeparms
,
778 u32 minorversion
, struct net
*net
)
780 struct nfs_client_initdata cl_init
= {
781 .hostname
= hostname
,
786 .minorversion
= minorversion
,
789 struct nfs_client
*clp
;
792 dprintk("--> nfs4_set_client()\n");
794 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
795 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
796 if (server
->options
& NFS_OPTION_MIGRATION
)
797 set_bit(NFS_CS_MIGRATION
, &cl_init
.init_flags
);
799 /* Allocate or find a client reference we can use */
800 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
802 error
= PTR_ERR(clp
);
807 * Query for the lease time on clientid setup or renewal
809 * Note that this will be set on nfs_clients that were created
810 * only for the DS role and did not set this bit, but now will
813 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
815 server
->nfs_client
= clp
;
816 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
819 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
824 * Set up a pNFS Data Server client.
826 * Return any existing nfs_client that matches server address,port,version
829 * For a new nfs_client, use a soft mount (default), a low retrans and a
830 * low timeout interval so that if a connection is lost, we retry through
833 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
834 const struct sockaddr
*ds_addr
, int ds_addrlen
,
835 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
837 struct nfs_client_initdata cl_init
= {
839 .addrlen
= ds_addrlen
,
842 .minorversion
= mds_clp
->cl_minorversion
,
843 .net
= mds_clp
->cl_net
,
845 struct rpc_timeout ds_timeout
;
846 struct nfs_client
*clp
;
849 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
850 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
851 * (section 13.1 RFC 5661).
853 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
854 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
855 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
857 dprintk("<-- %s %p\n", __func__
, clp
);
860 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
863 * Session has been established, and the client marked ready.
864 * Set the mount rsize and wsize with negotiated fore channel
865 * attributes which will be bound checked in nfs_server_set_fsinfo.
867 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
869 #ifdef CONFIG_NFS_V4_1
870 struct nfs4_session
*sess
;
874 if (!nfs4_has_session(server
->nfs_client
))
876 sess
= server
->nfs_client
->cl_session
;
877 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
878 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
880 if (server
->rsize
> server_resp_sz
)
881 server
->rsize
= server_resp_sz
;
882 if (server
->wsize
> server_rqst_sz
)
883 server
->wsize
= server_rqst_sz
;
884 #endif /* CONFIG_NFS_V4_1 */
887 static int nfs4_server_common_setup(struct nfs_server
*server
,
888 struct nfs_fh
*mntfh
, bool auth_probe
)
890 struct nfs_fattr
*fattr
;
893 /* data servers support only a subset of NFSv4.1 */
894 if (is_ds_only_client(server
->nfs_client
))
895 return -EPROTONOSUPPORT
;
897 fattr
= nfs_alloc_fattr();
901 /* We must ensure the session is initialised first */
902 error
= nfs4_init_session(server
->nfs_client
);
906 /* Set the basic capabilities */
907 server
->caps
|= server
->nfs_client
->cl_mvops
->init_caps
;
908 if (server
->flags
& NFS_MOUNT_NORDIRPLUS
)
909 server
->caps
&= ~NFS_CAP_READDIRPLUS
;
911 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
914 if (nfs4_disable_idmapping
&&
915 server
->client
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
916 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
919 /* Probe the root fh to retrieve its FSID and filehandle */
920 error
= nfs4_get_rootfh(server
, mntfh
, auth_probe
);
924 dprintk("Server FSID: %llx:%llx\n",
925 (unsigned long long) server
->fsid
.major
,
926 (unsigned long long) server
->fsid
.minor
);
927 dprintk("Mount FH: %d\n", mntfh
->size
);
929 nfs4_session_set_rwsize(server
);
931 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
935 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
936 server
->namelen
= NFS4_MAXNAMLEN
;
938 nfs_server_insert_lists(server
);
939 server
->mount_time
= jiffies
;
940 server
->destroy
= nfs4_destroy_server
;
942 nfs_free_fattr(fattr
);
947 * Create a version 4 volume record
949 static int nfs4_init_server(struct nfs_server
*server
,
950 const struct nfs_parsed_mount_data
*data
)
952 rpc_authflavor_t pseudoflavor
= RPC_AUTH_UNIX
;
953 struct rpc_timeout timeparms
;
956 dprintk("--> nfs4_init_server()\n");
958 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
959 data
->timeo
, data
->retrans
);
961 /* Initialise the client representation from the mount data */
962 server
->flags
= data
->flags
;
963 server
->options
= data
->options
;
965 if (data
->auth_flavor_len
>= 1)
966 pseudoflavor
= data
->auth_flavors
[0];
968 /* Get a client record */
969 error
= nfs4_set_client(server
,
970 data
->nfs_server
.hostname
,
971 (const struct sockaddr
*)&data
->nfs_server
.address
,
972 data
->nfs_server
.addrlen
,
973 data
->client_address
,
975 data
->nfs_server
.protocol
,
983 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
985 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
987 server
->acregmin
= data
->acregmin
* HZ
;
988 server
->acregmax
= data
->acregmax
* HZ
;
989 server
->acdirmin
= data
->acdirmin
* HZ
;
990 server
->acdirmax
= data
->acdirmax
* HZ
;
992 server
->port
= data
->nfs_server
.port
;
994 error
= nfs_init_server_rpcclient(server
, &timeparms
, pseudoflavor
);
998 dprintk("<-- nfs4_init_server() = %d\n", error
);
1003 * Create a version 4 volume record
1004 * - keyed on server and FSID
1006 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1007 struct nfs_fh *mntfh)*/
1008 struct nfs_server
*nfs4_create_server(struct nfs_mount_info
*mount_info
,
1009 struct nfs_subversion
*nfs_mod
)
1011 struct nfs_server
*server
;
1015 dprintk("--> nfs4_create_server()\n");
1017 server
= nfs_alloc_server();
1019 return ERR_PTR(-ENOMEM
);
1021 auth_probe
= mount_info
->parsed
->auth_flavor_len
< 1;
1023 /* set up the general RPC client */
1024 error
= nfs4_init_server(server
, mount_info
->parsed
);
1028 error
= nfs4_server_common_setup(server
, mount_info
->mntfh
, auth_probe
);
1032 dprintk("<-- nfs4_create_server() = %p\n", server
);
1036 nfs_free_server(server
);
1037 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1038 return ERR_PTR(error
);
1042 * Create an NFS4 referral server record
1044 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1045 struct nfs_fh
*mntfh
)
1047 struct nfs_client
*parent_client
;
1048 struct nfs_server
*server
, *parent_server
;
1051 dprintk("--> nfs4_create_referral_server()\n");
1053 server
= nfs_alloc_server();
1055 return ERR_PTR(-ENOMEM
);
1057 parent_server
= NFS_SB(data
->sb
);
1058 parent_client
= parent_server
->nfs_client
;
1060 /* Initialise the client representation from the parent server */
1061 nfs_server_copy_userdata(server
, parent_server
);
1063 /* Get a client representation.
1064 * Note: NFSv4 always uses TCP, */
1065 error
= nfs4_set_client(server
, data
->hostname
,
1068 parent_client
->cl_ipaddr
,
1070 rpc_protocol(parent_server
->client
),
1071 parent_server
->client
->cl_timeout
,
1072 parent_client
->cl_mvops
->minor_version
,
1073 parent_client
->cl_net
);
1077 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1081 error
= nfs4_server_common_setup(server
, mntfh
,
1082 !(parent_server
->flags
& NFS_MOUNT_SECFLAVOUR
));
1086 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1090 nfs_free_server(server
);
1091 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1092 return ERR_PTR(error
);