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>
13 #include <linux/sunrpc/rpc_pipe_fs.h>
16 #include "delegation.h"
17 #include "nfs4session.h"
21 #define NFSDBG_FACILITY NFSDBG_CLIENT
24 * Get a unique NFSv4.0 callback identifier which will be used
25 * by the V4.0 callback service to lookup the nfs_client struct
27 static int nfs_get_cb_ident_idr(struct nfs_client
*clp
, int minorversion
)
30 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
32 if (clp
->rpc_ops
->version
!= 4 || minorversion
!= 0)
34 idr_preload(GFP_KERNEL
);
35 spin_lock(&nn
->nfs_client_lock
);
36 ret
= idr_alloc(&nn
->cb_ident_idr
, clp
, 0, 0, GFP_NOWAIT
);
38 clp
->cl_cb_ident
= ret
;
39 spin_unlock(&nn
->nfs_client_lock
);
41 return ret
< 0 ? ret
: 0;
44 #ifdef CONFIG_NFS_V4_1
46 * Per auth flavor data server rpc clients
48 struct nfs4_ds_server
{
49 struct list_head list
; /* ds_clp->cl_ds_clients */
50 struct rpc_clnt
*rpc_clnt
;
54 * Common lookup case for DS I/O
56 static struct nfs4_ds_server
*
57 nfs4_find_ds_client(struct nfs_client
*ds_clp
, rpc_authflavor_t flavor
)
59 struct nfs4_ds_server
*dss
;
62 list_for_each_entry_rcu(dss
, &ds_clp
->cl_ds_clients
, list
) {
63 if (dss
->rpc_clnt
->cl_auth
->au_flavor
!= flavor
)
73 static struct nfs4_ds_server
*
74 nfs4_add_ds_client(struct nfs_client
*ds_clp
, rpc_authflavor_t flavor
,
75 struct nfs4_ds_server
*new)
77 struct nfs4_ds_server
*dss
;
79 spin_lock(&ds_clp
->cl_lock
);
80 list_for_each_entry(dss
, &ds_clp
->cl_ds_clients
, list
) {
81 if (dss
->rpc_clnt
->cl_auth
->au_flavor
!= flavor
)
86 list_add_rcu(&new->list
, &ds_clp
->cl_ds_clients
);
89 spin_unlock(&ds_clp
->cl_lock
); /* need some lock to protect list */
93 static struct nfs4_ds_server
*
94 nfs4_alloc_ds_server(struct nfs_client
*ds_clp
, rpc_authflavor_t flavor
)
96 struct nfs4_ds_server
*dss
;
98 dss
= kmalloc(sizeof(*dss
), GFP_NOFS
);
100 return ERR_PTR(-ENOMEM
);
102 dss
->rpc_clnt
= rpc_clone_client_set_auth(ds_clp
->cl_rpcclient
, flavor
);
103 if (IS_ERR(dss
->rpc_clnt
)) {
104 int err
= PTR_ERR(dss
->rpc_clnt
);
108 INIT_LIST_HEAD(&dss
->list
);
114 nfs4_free_ds_server(struct nfs4_ds_server
*dss
)
116 rpc_release_client(dss
->rpc_clnt
);
121 * Find or create a DS rpc client with th MDS server rpc client auth flavor
122 * in the nfs_client cl_ds_clients list.
125 nfs4_find_or_create_ds_client(struct nfs_client
*ds_clp
, struct inode
*inode
)
127 struct nfs4_ds_server
*dss
, *new;
128 rpc_authflavor_t flavor
= NFS_SERVER(inode
)->client
->cl_auth
->au_flavor
;
130 dss
= nfs4_find_ds_client(ds_clp
, flavor
);
133 new = nfs4_alloc_ds_server(ds_clp
, flavor
);
135 return ERR_CAST(new);
136 dss
= nfs4_add_ds_client(ds_clp
, flavor
, new);
138 nfs4_free_ds_server(new);
140 return dss
->rpc_clnt
;
142 EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client
);
145 nfs4_shutdown_ds_clients(struct nfs_client
*clp
)
147 struct nfs4_ds_server
*dss
;
148 LIST_HEAD(shutdown_list
);
150 while (!list_empty(&clp
->cl_ds_clients
)) {
151 dss
= list_entry(clp
->cl_ds_clients
.next
,
152 struct nfs4_ds_server
, list
);
153 list_del(&dss
->list
);
154 rpc_shutdown_client(dss
->rpc_clnt
);
159 void nfs41_shutdown_client(struct nfs_client
*clp
)
161 if (nfs4_has_session(clp
)) {
162 nfs4_shutdown_ds_clients(clp
);
163 nfs4_destroy_session(clp
->cl_session
);
164 nfs4_destroy_clientid(clp
);
168 #endif /* CONFIG_NFS_V4_1 */
170 void nfs40_shutdown_client(struct nfs_client
*clp
)
172 if (clp
->cl_slot_tbl
) {
173 nfs4_release_slot_table(clp
->cl_slot_tbl
);
174 kfree(clp
->cl_slot_tbl
);
178 struct nfs_client
*nfs4_alloc_client(const struct nfs_client_initdata
*cl_init
)
181 struct nfs_client
*clp
= nfs_alloc_client(cl_init
);
185 err
= nfs_get_cb_ident_idr(clp
, cl_init
->minorversion
);
189 if (cl_init
->minorversion
> NFS4_MAX_MINOR_VERSION
) {
194 spin_lock_init(&clp
->cl_lock
);
195 INIT_DELAYED_WORK(&clp
->cl_renewd
, nfs4_renew_state
);
196 INIT_LIST_HEAD(&clp
->cl_ds_clients
);
197 rpc_init_wait_queue(&clp
->cl_rpcwaitq
, "NFS client");
198 clp
->cl_state
= 1 << NFS4CLNT_LEASE_EXPIRED
;
199 clp
->cl_minorversion
= cl_init
->minorversion
;
200 clp
->cl_mvops
= nfs_v4_minor_ops
[cl_init
->minorversion
];
205 nfs_free_client(clp
);
210 * Destroy the NFS4 callback service
212 static void nfs4_destroy_callback(struct nfs_client
*clp
)
214 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
215 nfs_callback_down(clp
->cl_mvops
->minor_version
, clp
->cl_net
);
218 static void nfs4_shutdown_client(struct nfs_client
*clp
)
220 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
221 nfs4_kill_renewd(clp
);
222 clp
->cl_mvops
->shutdown_client(clp
);
223 nfs4_destroy_callback(clp
);
224 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
225 nfs_idmap_delete(clp
);
227 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
228 kfree(clp
->cl_serverowner
);
229 kfree(clp
->cl_serverscope
);
230 kfree(clp
->cl_implid
);
233 void nfs4_free_client(struct nfs_client
*clp
)
235 nfs4_shutdown_client(clp
);
236 nfs_free_client(clp
);
240 * Initialize the NFS4 callback service
242 static int nfs4_init_callback(struct nfs_client
*clp
)
246 if (clp
->rpc_ops
->version
== 4) {
247 struct rpc_xprt
*xprt
;
249 xprt
= rcu_dereference_raw(clp
->cl_rpcclient
->cl_xprt
);
251 if (nfs4_has_session(clp
)) {
252 error
= xprt_setup_backchannel(xprt
,
253 NFS41_BC_MIN_CALLBACKS
);
258 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
, xprt
);
260 dprintk("%s: failed to start callback. Error = %d\n",
264 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
270 * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
271 * @clp - nfs_client to initialize
273 * Returns zero on success, or a negative errno if some error occurred.
275 int nfs40_init_client(struct nfs_client
*clp
)
277 struct nfs4_slot_table
*tbl
;
280 tbl
= kzalloc(sizeof(*tbl
), GFP_NOFS
);
284 ret
= nfs4_setup_slot_table(tbl
, NFS4_MAX_SLOT_TABLE
,
285 "NFSv4.0 transport Slot table");
291 clp
->cl_slot_tbl
= tbl
;
295 #if defined(CONFIG_NFS_V4_1)
298 * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
299 * @clp - nfs_client to initialize
301 * Returns zero on success, or a negative errno if some error occurred.
303 int nfs41_init_client(struct nfs_client
*clp
)
305 struct nfs4_session
*session
= NULL
;
308 * Create the session and mark it expired.
309 * When a SEQUENCE operation encounters the expired session
310 * it will do session recovery to initialize it.
312 session
= nfs4_alloc_session(clp
);
316 clp
->cl_session
= session
;
319 * The create session reply races with the server back
320 * channel probe. Mark the client NFS_CS_SESSION_INITING
321 * so that the client back channel can find the
324 nfs_mark_client_ready(clp
, NFS_CS_SESSION_INITING
);
328 #endif /* CONFIG_NFS_V4_1 */
331 * Initialize the minor version specific parts of an NFS4 client record
333 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
337 ret
= clp
->cl_mvops
->init_client(clp
);
340 return nfs4_init_callback(clp
);
344 * nfs4_init_client - Initialise an NFS4 client record
346 * @clp: nfs_client to initialise
347 * @timeparms: timeout parameters for underlying RPC transport
348 * @ip_addr: callback IP address in presentation format
349 * @authflavor: authentication flavor for underlying RPC transport
351 * Returns pointer to an NFS client, or an ERR_PTR value.
353 struct nfs_client
*nfs4_init_client(struct nfs_client
*clp
,
354 const struct rpc_timeout
*timeparms
,
357 char buf
[INET6_ADDRSTRLEN
+ 1];
358 struct nfs_client
*old
;
361 if (clp
->cl_cons_state
== NFS_CS_READY
) {
362 /* the client is initialised already */
363 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
367 /* Check NFS protocol revision and initialize RPC op vector */
368 clp
->rpc_ops
= &nfs_v4_clientops
;
370 if (clp
->cl_minorversion
!= 0)
371 __set_bit(NFS_CS_INFINITE_SLOTS
, &clp
->cl_flags
);
372 __set_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
);
373 __set_bit(NFS_CS_NO_RETRANS_TIMEOUT
, &clp
->cl_flags
);
376 if (gssd_running(clp
->cl_net
))
377 error
= nfs_create_rpc_client(clp
, timeparms
,
379 if (error
== -EINVAL
)
380 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
384 /* If no clientaddr= option was specified, find a usable cb address */
385 if (ip_addr
== NULL
) {
386 struct sockaddr_storage cb_addr
;
387 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
389 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
392 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
395 ip_addr
= (const char *)buf
;
397 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
399 error
= nfs_idmap_new(clp
);
401 dprintk("%s: failed to create idmapper. Error = %d\n",
405 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
407 error
= nfs4_init_client_minor_version(clp
);
411 if (!nfs4_has_session(clp
))
412 nfs_mark_client_ready(clp
, NFS_CS_READY
);
414 error
= nfs4_discover_server_trunking(clp
, &old
);
419 clp
->cl_preserve_clid
= true;
424 nfs_mark_client_ready(clp
, error
);
426 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
427 return ERR_PTR(error
);
431 * SETCLIENTID just did a callback update with the callback ident in
432 * "drop," but server trunking discovery claims "drop" and "keep" are
433 * actually the same server. Swap the callback IDs so that "keep"
434 * will continue to use the callback ident the server now knows about,
435 * and so that "keep"'s original callback ident is destroyed when
438 static void nfs4_swap_callback_idents(struct nfs_client
*keep
,
439 struct nfs_client
*drop
)
441 struct nfs_net
*nn
= net_generic(keep
->cl_net
, nfs_net_id
);
442 unsigned int save
= keep
->cl_cb_ident
;
444 if (keep
->cl_cb_ident
== drop
->cl_cb_ident
)
447 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
448 __func__
, keep
->cl_cb_ident
, drop
->cl_cb_ident
);
450 spin_lock(&nn
->nfs_client_lock
);
452 idr_replace(&nn
->cb_ident_idr
, keep
, drop
->cl_cb_ident
);
453 keep
->cl_cb_ident
= drop
->cl_cb_ident
;
455 idr_replace(&nn
->cb_ident_idr
, drop
, save
);
456 drop
->cl_cb_ident
= save
;
458 spin_unlock(&nn
->nfs_client_lock
);
462 * nfs40_walk_client_list - Find server that recognizes a client ID
464 * @new: nfs_client with client ID to test
465 * @result: OUT: found nfs_client, or new
466 * @cred: credential to use for trunking test
468 * Returns zero, a negative errno, or a negative NFS4ERR status.
469 * If zero is returned, an nfs_client pointer is planted in "result."
471 * NB: nfs40_walk_client_list() relies on the new nfs_client being
472 * the last nfs_client on the list.
474 int nfs40_walk_client_list(struct nfs_client
*new,
475 struct nfs_client
**result
,
476 struct rpc_cred
*cred
)
478 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
479 struct nfs_client
*pos
, *prev
= NULL
;
480 struct nfs4_setclientid_res clid
= {
481 .clientid
= new->cl_clientid
,
482 .confirm
= new->cl_confirm
,
484 int status
= -NFS4ERR_STALE_CLIENTID
;
486 spin_lock(&nn
->nfs_client_lock
);
487 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
488 /* If "pos" isn't marked ready, we can't trust the
489 * remaining fields in "pos" */
490 if (pos
->cl_cons_state
> NFS_CS_READY
) {
491 atomic_inc(&pos
->cl_count
);
492 spin_unlock(&nn
->nfs_client_lock
);
495 nfs_put_client(prev
);
498 status
= nfs_wait_client_init_complete(pos
);
501 status
= -NFS4ERR_STALE_CLIENTID
;
502 spin_lock(&nn
->nfs_client_lock
);
504 if (pos
->cl_cons_state
!= NFS_CS_READY
)
507 if (pos
->rpc_ops
!= new->rpc_ops
)
510 if (pos
->cl_proto
!= new->cl_proto
)
513 if (pos
->cl_minorversion
!= new->cl_minorversion
)
516 if (pos
->cl_clientid
!= new->cl_clientid
)
519 atomic_inc(&pos
->cl_count
);
520 spin_unlock(&nn
->nfs_client_lock
);
523 nfs_put_client(prev
);
526 status
= nfs4_proc_setclientid_confirm(pos
, &clid
, cred
);
528 case -NFS4ERR_STALE_CLIENTID
:
531 nfs4_swap_callback_idents(pos
, new);
535 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
536 __func__
, pos
, atomic_read(&pos
->cl_count
));
541 spin_lock(&nn
->nfs_client_lock
);
543 spin_unlock(&nn
->nfs_client_lock
);
545 /* No match found. The server lost our clientid */
548 nfs_put_client(prev
);
549 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
553 #ifdef CONFIG_NFS_V4_1
555 * Returns true if the client IDs match
557 static bool nfs4_match_clientids(struct nfs_client
*a
, struct nfs_client
*b
)
559 if (a
->cl_clientid
!= b
->cl_clientid
) {
560 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
561 __func__
, a
->cl_clientid
, b
->cl_clientid
);
564 dprintk("NFS: --> %s client ID %llx matches %llx\n",
565 __func__
, a
->cl_clientid
, b
->cl_clientid
);
570 * Returns true if the server owners match
573 nfs4_match_serverowners(struct nfs_client
*a
, struct nfs_client
*b
)
575 struct nfs41_server_owner
*o1
= a
->cl_serverowner
;
576 struct nfs41_server_owner
*o2
= b
->cl_serverowner
;
578 if (o1
->minor_id
!= o2
->minor_id
) {
579 dprintk("NFS: --> %s server owner minor IDs do not match\n",
584 if (o1
->major_id_sz
!= o2
->major_id_sz
)
585 goto out_major_mismatch
;
586 if (memcmp(o1
->major_id
, o2
->major_id
, o1
->major_id_sz
) != 0)
587 goto out_major_mismatch
;
589 dprintk("NFS: --> %s server owners match\n", __func__
);
593 dprintk("NFS: --> %s server owner major IDs do not match\n",
599 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
601 * @new: nfs_client with client ID to test
602 * @result: OUT: found nfs_client, or new
603 * @cred: credential to use for trunking test
605 * Returns zero, a negative errno, or a negative NFS4ERR status.
606 * If zero is returned, an nfs_client pointer is planted in "result."
608 * NB: nfs41_walk_client_list() relies on the new nfs_client being
609 * the last nfs_client on the list.
611 int nfs41_walk_client_list(struct nfs_client
*new,
612 struct nfs_client
**result
,
613 struct rpc_cred
*cred
)
615 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
616 struct nfs_client
*pos
, *prev
= NULL
;
617 int status
= -NFS4ERR_STALE_CLIENTID
;
619 spin_lock(&nn
->nfs_client_lock
);
620 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
621 /* If "pos" isn't marked ready, we can't trust the
622 * remaining fields in "pos", especially the client
623 * ID and serverowner fields. Wait for CREATE_SESSION
625 if (pos
->cl_cons_state
> NFS_CS_READY
) {
626 atomic_inc(&pos
->cl_count
);
627 spin_unlock(&nn
->nfs_client_lock
);
630 nfs_put_client(prev
);
633 status
= nfs_wait_client_init_complete(pos
);
635 nfs4_schedule_lease_recovery(pos
);
636 status
= nfs4_wait_clnt_recover(pos
);
638 spin_lock(&nn
->nfs_client_lock
);
641 status
= -NFS4ERR_STALE_CLIENTID
;
643 if (pos
->cl_cons_state
!= NFS_CS_READY
)
646 if (pos
->rpc_ops
!= new->rpc_ops
)
649 if (pos
->cl_proto
!= new->cl_proto
)
652 if (pos
->cl_minorversion
!= new->cl_minorversion
)
655 if (!nfs4_match_clientids(pos
, new))
658 if (!nfs4_match_serverowners(pos
, new))
661 atomic_inc(&pos
->cl_count
);
664 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
665 __func__
, pos
, atomic_read(&pos
->cl_count
));
669 /* No matching nfs_client found. */
670 spin_unlock(&nn
->nfs_client_lock
);
671 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
673 nfs_put_client(prev
);
676 #endif /* CONFIG_NFS_V4_1 */
678 static void nfs4_destroy_server(struct nfs_server
*server
)
680 nfs_server_return_all_delegations(server
);
681 unset_pnfs_layoutdriver(server
);
682 nfs4_purge_state_owners(server
);
686 * NFSv4.0 callback thread helper
688 * Find a client by callback identifier
691 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
693 struct nfs_client
*clp
;
694 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
696 spin_lock(&nn
->nfs_client_lock
);
697 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
699 atomic_inc(&clp
->cl_count
);
700 spin_unlock(&nn
->nfs_client_lock
);
704 #if defined(CONFIG_NFS_V4_1)
705 /* Common match routine for v4.0 and v4.1 callback services */
706 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
707 struct nfs_client
*clp
, u32 minorversion
)
709 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
711 /* Don't match clients that failed to initialise */
712 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
713 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
718 /* Match the version and minorversion */
719 if (clp
->rpc_ops
->version
!= 4 ||
720 clp
->cl_minorversion
!= minorversion
)
723 /* Match only the IP address, not the port number */
724 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
731 * NFSv4.1 callback thread helper
732 * For CB_COMPOUND calls, find a client by IP address, protocol version,
733 * minorversion, and sessionID
735 * Returns NULL if no such client
738 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
739 struct nfs4_sessionid
*sid
, u32 minorversion
)
741 struct nfs_client
*clp
;
742 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
744 spin_lock(&nn
->nfs_client_lock
);
745 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
746 if (nfs4_cb_match_client(addr
, clp
, minorversion
) == false)
749 if (!nfs4_has_session(clp
))
753 if (memcmp(clp
->cl_session
->sess_id
.data
,
754 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
757 atomic_inc(&clp
->cl_count
);
758 spin_unlock(&nn
->nfs_client_lock
);
761 spin_unlock(&nn
->nfs_client_lock
);
765 #else /* CONFIG_NFS_V4_1 */
768 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
769 struct nfs4_sessionid
*sid
, u32 minorversion
)
773 #endif /* CONFIG_NFS_V4_1 */
776 * Set up an NFS4 client
778 static int nfs4_set_client(struct nfs_server
*server
,
779 const char *hostname
,
780 const struct sockaddr
*addr
,
781 const size_t addrlen
,
783 rpc_authflavor_t authflavour
,
784 int proto
, const struct rpc_timeout
*timeparms
,
785 u32 minorversion
, struct net
*net
)
787 struct nfs_client_initdata cl_init
= {
788 .hostname
= hostname
,
793 .minorversion
= minorversion
,
796 struct nfs_client
*clp
;
799 dprintk("--> nfs4_set_client()\n");
801 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
802 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
803 if (server
->options
& NFS_OPTION_MIGRATION
)
804 set_bit(NFS_CS_MIGRATION
, &cl_init
.init_flags
);
806 /* Allocate or find a client reference we can use */
807 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
809 error
= PTR_ERR(clp
);
814 * Query for the lease time on clientid setup or renewal
816 * Note that this will be set on nfs_clients that were created
817 * only for the DS role and did not set this bit, but now will
820 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
822 server
->nfs_client
= clp
;
823 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
826 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
831 * Set up a pNFS Data Server client.
833 * Return any existing nfs_client that matches server address,port,version
836 * For a new nfs_client, use a soft mount (default), a low retrans and a
837 * low timeout interval so that if a connection is lost, we retry through
840 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
841 const struct sockaddr
*ds_addr
, int ds_addrlen
,
842 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
844 struct nfs_client_initdata cl_init
= {
846 .addrlen
= ds_addrlen
,
849 .minorversion
= mds_clp
->cl_minorversion
,
850 .net
= mds_clp
->cl_net
,
852 struct rpc_timeout ds_timeout
;
853 struct nfs_client
*clp
;
856 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
857 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
858 * (section 13.1 RFC 5661).
860 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
861 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
862 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
864 dprintk("<-- %s %p\n", __func__
, clp
);
867 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
870 * Session has been established, and the client marked ready.
871 * Set the mount rsize and wsize with negotiated fore channel
872 * attributes which will be bound checked in nfs_server_set_fsinfo.
874 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
876 #ifdef CONFIG_NFS_V4_1
877 struct nfs4_session
*sess
;
881 if (!nfs4_has_session(server
->nfs_client
))
883 sess
= server
->nfs_client
->cl_session
;
884 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
885 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
887 if (server
->rsize
> server_resp_sz
)
888 server
->rsize
= server_resp_sz
;
889 if (server
->wsize
> server_rqst_sz
)
890 server
->wsize
= server_rqst_sz
;
891 #endif /* CONFIG_NFS_V4_1 */
894 static int nfs4_server_common_setup(struct nfs_server
*server
,
895 struct nfs_fh
*mntfh
, bool auth_probe
)
897 struct nfs_fattr
*fattr
;
900 /* data servers support only a subset of NFSv4.1 */
901 if (is_ds_only_client(server
->nfs_client
))
902 return -EPROTONOSUPPORT
;
904 fattr
= nfs_alloc_fattr();
908 /* We must ensure the session is initialised first */
909 error
= nfs4_init_session(server
->nfs_client
);
913 /* Set the basic capabilities */
914 server
->caps
|= server
->nfs_client
->cl_mvops
->init_caps
;
915 if (server
->flags
& NFS_MOUNT_NORDIRPLUS
)
916 server
->caps
&= ~NFS_CAP_READDIRPLUS
;
918 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
921 if (nfs4_disable_idmapping
&&
922 server
->client
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
923 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
926 /* Probe the root fh to retrieve its FSID and filehandle */
927 error
= nfs4_get_rootfh(server
, mntfh
, auth_probe
);
931 dprintk("Server FSID: %llx:%llx\n",
932 (unsigned long long) server
->fsid
.major
,
933 (unsigned long long) server
->fsid
.minor
);
934 nfs_display_fhandle(mntfh
, "Pseudo-fs root FH");
936 nfs4_session_set_rwsize(server
);
938 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
942 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
943 server
->namelen
= NFS4_MAXNAMLEN
;
945 nfs_server_insert_lists(server
);
946 server
->mount_time
= jiffies
;
947 server
->destroy
= nfs4_destroy_server
;
949 nfs_free_fattr(fattr
);
954 * Create a version 4 volume record
956 static int nfs4_init_server(struct nfs_server
*server
,
957 struct nfs_parsed_mount_data
*data
)
959 struct rpc_timeout timeparms
;
962 dprintk("--> nfs4_init_server()\n");
964 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
965 data
->timeo
, data
->retrans
);
967 /* Initialise the client representation from the mount data */
968 server
->flags
= data
->flags
;
969 server
->options
= data
->options
;
970 server
->auth_info
= data
->auth_info
;
972 /* Use the first specified auth flavor. If this flavor isn't
973 * allowed by the server, use the SECINFO path to try the
974 * other specified flavors */
975 if (data
->auth_info
.flavor_len
>= 1)
976 data
->selected_flavor
= data
->auth_info
.flavors
[0];
978 data
->selected_flavor
= RPC_AUTH_UNIX
;
980 /* Get a client record */
981 error
= nfs4_set_client(server
,
982 data
->nfs_server
.hostname
,
983 (const struct sockaddr
*)&data
->nfs_server
.address
,
984 data
->nfs_server
.addrlen
,
985 data
->client_address
,
986 data
->selected_flavor
,
987 data
->nfs_server
.protocol
,
995 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
997 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
999 server
->acregmin
= data
->acregmin
* HZ
;
1000 server
->acregmax
= data
->acregmax
* HZ
;
1001 server
->acdirmin
= data
->acdirmin
* HZ
;
1002 server
->acdirmax
= data
->acdirmax
* HZ
;
1004 server
->port
= data
->nfs_server
.port
;
1006 error
= nfs_init_server_rpcclient(server
, &timeparms
,
1007 data
->selected_flavor
);
1011 dprintk("<-- nfs4_init_server() = %d\n", error
);
1016 * Create a version 4 volume record
1017 * - keyed on server and FSID
1019 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1020 struct nfs_fh *mntfh)*/
1021 struct nfs_server
*nfs4_create_server(struct nfs_mount_info
*mount_info
,
1022 struct nfs_subversion
*nfs_mod
)
1024 struct nfs_server
*server
;
1028 dprintk("--> nfs4_create_server()\n");
1030 server
= nfs_alloc_server();
1032 return ERR_PTR(-ENOMEM
);
1034 auth_probe
= mount_info
->parsed
->auth_info
.flavor_len
< 1;
1036 /* set up the general RPC client */
1037 error
= nfs4_init_server(server
, mount_info
->parsed
);
1041 error
= nfs4_server_common_setup(server
, mount_info
->mntfh
, auth_probe
);
1045 dprintk("<-- nfs4_create_server() = %p\n", server
);
1049 nfs_free_server(server
);
1050 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1051 return ERR_PTR(error
);
1055 * Create an NFS4 referral server record
1057 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1058 struct nfs_fh
*mntfh
)
1060 struct nfs_client
*parent_client
;
1061 struct nfs_server
*server
, *parent_server
;
1065 dprintk("--> nfs4_create_referral_server()\n");
1067 server
= nfs_alloc_server();
1069 return ERR_PTR(-ENOMEM
);
1071 parent_server
= NFS_SB(data
->sb
);
1072 parent_client
= parent_server
->nfs_client
;
1074 /* Initialise the client representation from the parent server */
1075 nfs_server_copy_userdata(server
, parent_server
);
1077 /* Get a client representation.
1078 * Note: NFSv4 always uses TCP, */
1079 error
= nfs4_set_client(server
, data
->hostname
,
1082 parent_client
->cl_ipaddr
,
1084 rpc_protocol(parent_server
->client
),
1085 parent_server
->client
->cl_timeout
,
1086 parent_client
->cl_mvops
->minor_version
,
1087 parent_client
->cl_net
);
1091 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1095 auth_probe
= parent_server
->auth_info
.flavor_len
< 1;
1097 error
= nfs4_server_common_setup(server
, mntfh
, auth_probe
);
1101 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1105 nfs_free_server(server
);
1106 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1107 return ERR_PTR(error
);
1111 * Grab the destination's particulars, including lease expiry time.
1113 * Returns zero if probe succeeded and retrieved FSID matches the FSID
1116 static int nfs_probe_destination(struct nfs_server
*server
)
1118 struct inode
*inode
= server
->super
->s_root
->d_inode
;
1119 struct nfs_fattr
*fattr
;
1122 fattr
= nfs_alloc_fattr();
1126 /* Sanity: the probe won't work if the destination server
1127 * does not recognize the migrated FH. */
1128 error
= nfs_probe_fsinfo(server
, NFS_FH(inode
), fattr
);
1130 nfs_free_fattr(fattr
);
1135 * nfs4_update_server - Move an nfs_server to a different nfs_client
1137 * @server: represents FSID to be moved
1138 * @hostname: new end-point's hostname
1139 * @sap: new end-point's socket address
1140 * @salen: size of "sap"
1142 * The nfs_server must be quiescent before this function is invoked.
1143 * Either its session is drained (NFSv4.1+), or its transport is
1144 * plugged and drained (NFSv4.0).
1146 * Returns zero on success, or a negative errno value.
1148 int nfs4_update_server(struct nfs_server
*server
, const char *hostname
,
1149 struct sockaddr
*sap
, size_t salen
)
1151 struct nfs_client
*clp
= server
->nfs_client
;
1152 struct rpc_clnt
*clnt
= server
->client
;
1153 struct xprt_create xargs
= {
1154 .ident
= clp
->cl_proto
,
1158 .servername
= hostname
,
1160 char buf
[INET6_ADDRSTRLEN
+ 1];
1161 struct sockaddr_storage address
;
1162 struct sockaddr
*localaddr
= (struct sockaddr
*)&address
;
1165 dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__
,
1166 (unsigned long long)server
->fsid
.major
,
1167 (unsigned long long)server
->fsid
.minor
,
1170 error
= rpc_switch_client_transport(clnt
, &xargs
, clnt
->cl_timeout
);
1172 dprintk("<-- %s(): rpc_switch_client_transport returned %d\n",
1177 error
= rpc_localaddr(clnt
, localaddr
, sizeof(address
));
1179 dprintk("<-- %s(): rpc_localaddr returned %d\n",
1184 error
= -EAFNOSUPPORT
;
1185 if (rpc_ntop(localaddr
, buf
, sizeof(buf
)) == 0) {
1186 dprintk("<-- %s(): rpc_ntop returned %d\n",
1191 nfs_server_remove_lists(server
);
1192 error
= nfs4_set_client(server
, hostname
, sap
, salen
, buf
,
1193 clp
->cl_rpcclient
->cl_auth
->au_flavor
,
1194 clp
->cl_proto
, clnt
->cl_timeout
,
1195 clp
->cl_minorversion
, clp
->cl_net
);
1196 nfs_put_client(clp
);
1198 nfs_server_insert_lists(server
);
1199 dprintk("<-- %s(): nfs4_set_client returned %d\n",
1204 if (server
->nfs_client
->cl_hostname
== NULL
)
1205 server
->nfs_client
->cl_hostname
= kstrdup(hostname
, GFP_KERNEL
);
1206 nfs_server_insert_lists(server
);
1208 error
= nfs_probe_destination(server
);
1212 dprintk("<-- %s() succeeded\n", __func__
);