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_shutdown_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
);
375 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_GSS_KRB5I
);
376 if (error
== -EINVAL
)
377 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
381 /* If no clientaddr= option was specified, find a usable cb address */
382 if (ip_addr
== NULL
) {
383 struct sockaddr_storage cb_addr
;
384 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
386 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
389 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
392 ip_addr
= (const char *)buf
;
394 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
396 error
= nfs_idmap_new(clp
);
398 dprintk("%s: failed to create idmapper. Error = %d\n",
402 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
404 error
= nfs4_init_client_minor_version(clp
);
408 if (!nfs4_has_session(clp
))
409 nfs_mark_client_ready(clp
, NFS_CS_READY
);
411 error
= nfs4_discover_server_trunking(clp
, &old
);
416 clp
->cl_preserve_clid
= true;
421 nfs_mark_client_ready(clp
, error
);
423 dprintk("<-- nfs4_init_client() = xerror %d\n", error
);
424 return ERR_PTR(error
);
428 * SETCLIENTID just did a callback update with the callback ident in
429 * "drop," but server trunking discovery claims "drop" and "keep" are
430 * actually the same server. Swap the callback IDs so that "keep"
431 * will continue to use the callback ident the server now knows about,
432 * and so that "keep"'s original callback ident is destroyed when
435 static void nfs4_swap_callback_idents(struct nfs_client
*keep
,
436 struct nfs_client
*drop
)
438 struct nfs_net
*nn
= net_generic(keep
->cl_net
, nfs_net_id
);
439 unsigned int save
= keep
->cl_cb_ident
;
441 if (keep
->cl_cb_ident
== drop
->cl_cb_ident
)
444 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
445 __func__
, keep
->cl_cb_ident
, drop
->cl_cb_ident
);
447 spin_lock(&nn
->nfs_client_lock
);
449 idr_replace(&nn
->cb_ident_idr
, keep
, drop
->cl_cb_ident
);
450 keep
->cl_cb_ident
= drop
->cl_cb_ident
;
452 idr_replace(&nn
->cb_ident_idr
, drop
, save
);
453 drop
->cl_cb_ident
= save
;
455 spin_unlock(&nn
->nfs_client_lock
);
459 * nfs40_walk_client_list - Find server that recognizes a client ID
461 * @new: nfs_client with client ID to test
462 * @result: OUT: found nfs_client, or new
463 * @cred: credential to use for trunking test
465 * Returns zero, a negative errno, or a negative NFS4ERR status.
466 * If zero is returned, an nfs_client pointer is planted in "result."
468 * NB: nfs40_walk_client_list() relies on the new nfs_client being
469 * the last nfs_client on the list.
471 int nfs40_walk_client_list(struct nfs_client
*new,
472 struct nfs_client
**result
,
473 struct rpc_cred
*cred
)
475 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
476 struct nfs_client
*pos
, *prev
= NULL
;
477 struct nfs4_setclientid_res clid
= {
478 .clientid
= new->cl_clientid
,
479 .confirm
= new->cl_confirm
,
481 int status
= -NFS4ERR_STALE_CLIENTID
;
483 spin_lock(&nn
->nfs_client_lock
);
484 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
486 if (pos
->rpc_ops
!= new->rpc_ops
)
489 if (pos
->cl_proto
!= new->cl_proto
)
492 if (pos
->cl_minorversion
!= new->cl_minorversion
)
495 /* If "pos" isn't marked ready, we can't trust the
496 * remaining fields in "pos" */
497 if (pos
->cl_cons_state
> NFS_CS_READY
) {
498 atomic_inc(&pos
->cl_count
);
499 spin_unlock(&nn
->nfs_client_lock
);
502 nfs_put_client(prev
);
505 status
= nfs_wait_client_init_complete(pos
);
508 status
= -NFS4ERR_STALE_CLIENTID
;
509 spin_lock(&nn
->nfs_client_lock
);
511 if (pos
->cl_cons_state
!= NFS_CS_READY
)
514 if (pos
->cl_clientid
!= new->cl_clientid
)
517 atomic_inc(&pos
->cl_count
);
518 spin_unlock(&nn
->nfs_client_lock
);
521 nfs_put_client(prev
);
524 status
= nfs4_proc_setclientid_confirm(pos
, &clid
, cred
);
526 case -NFS4ERR_STALE_CLIENTID
:
529 nfs4_swap_callback_idents(pos
, new);
533 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
534 __func__
, pos
, atomic_read(&pos
->cl_count
));
538 /* The callback path may have been inadvertently
539 * changed. Schedule recovery!
541 nfs4_schedule_path_down_recovery(pos
);
546 spin_lock(&nn
->nfs_client_lock
);
548 spin_unlock(&nn
->nfs_client_lock
);
550 /* No match found. The server lost our clientid */
553 nfs_put_client(prev
);
554 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
558 #ifdef CONFIG_NFS_V4_1
560 * Returns true if the client IDs match
562 static bool nfs4_match_clientids(struct nfs_client
*a
, struct nfs_client
*b
)
564 if (a
->cl_clientid
!= b
->cl_clientid
) {
565 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
566 __func__
, a
->cl_clientid
, b
->cl_clientid
);
569 dprintk("NFS: --> %s client ID %llx matches %llx\n",
570 __func__
, a
->cl_clientid
, b
->cl_clientid
);
575 * Returns true if the server owners match
578 nfs4_match_serverowners(struct nfs_client
*a
, struct nfs_client
*b
)
580 struct nfs41_server_owner
*o1
= a
->cl_serverowner
;
581 struct nfs41_server_owner
*o2
= b
->cl_serverowner
;
583 if (o1
->minor_id
!= o2
->minor_id
) {
584 dprintk("NFS: --> %s server owner minor IDs do not match\n",
589 if (o1
->major_id_sz
!= o2
->major_id_sz
)
590 goto out_major_mismatch
;
591 if (memcmp(o1
->major_id
, o2
->major_id
, o1
->major_id_sz
) != 0)
592 goto out_major_mismatch
;
594 dprintk("NFS: --> %s server owners match\n", __func__
);
598 dprintk("NFS: --> %s server owner major IDs do not match\n",
604 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
606 * @new: nfs_client with client ID to test
607 * @result: OUT: found nfs_client, or new
608 * @cred: credential to use for trunking test
610 * Returns zero, a negative errno, or a negative NFS4ERR status.
611 * If zero is returned, an nfs_client pointer is planted in "result."
613 * NB: nfs41_walk_client_list() relies on the new nfs_client being
614 * the last nfs_client on the list.
616 int nfs41_walk_client_list(struct nfs_client
*new,
617 struct nfs_client
**result
,
618 struct rpc_cred
*cred
)
620 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
621 struct nfs_client
*pos
, *prev
= NULL
;
622 int status
= -NFS4ERR_STALE_CLIENTID
;
624 spin_lock(&nn
->nfs_client_lock
);
625 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
627 if (pos
->rpc_ops
!= new->rpc_ops
)
630 if (pos
->cl_proto
!= new->cl_proto
)
633 if (pos
->cl_minorversion
!= new->cl_minorversion
)
636 /* If "pos" isn't marked ready, we can't trust the
637 * remaining fields in "pos", especially the client
638 * ID and serverowner fields. Wait for CREATE_SESSION
640 if (pos
->cl_cons_state
> NFS_CS_READY
) {
641 atomic_inc(&pos
->cl_count
);
642 spin_unlock(&nn
->nfs_client_lock
);
645 nfs_put_client(prev
);
648 status
= nfs_wait_client_init_complete(pos
);
650 nfs4_schedule_lease_recovery(pos
);
651 status
= nfs4_wait_clnt_recover(pos
);
653 spin_lock(&nn
->nfs_client_lock
);
656 status
= -NFS4ERR_STALE_CLIENTID
;
658 if (pos
->cl_cons_state
!= NFS_CS_READY
)
661 if (!nfs4_match_clientids(pos
, new))
664 if (!nfs4_match_serverowners(pos
, new))
667 atomic_inc(&pos
->cl_count
);
670 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
671 __func__
, pos
, atomic_read(&pos
->cl_count
));
675 /* No matching nfs_client found. */
676 spin_unlock(&nn
->nfs_client_lock
);
677 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
679 nfs_put_client(prev
);
682 #endif /* CONFIG_NFS_V4_1 */
684 static void nfs4_destroy_server(struct nfs_server
*server
)
686 nfs_server_return_all_delegations(server
);
687 unset_pnfs_layoutdriver(server
);
688 nfs4_purge_state_owners(server
);
692 * NFSv4.0 callback thread helper
694 * Find a client by callback identifier
697 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
699 struct nfs_client
*clp
;
700 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
702 spin_lock(&nn
->nfs_client_lock
);
703 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
705 atomic_inc(&clp
->cl_count
);
706 spin_unlock(&nn
->nfs_client_lock
);
710 #if defined(CONFIG_NFS_V4_1)
711 /* Common match routine for v4.0 and v4.1 callback services */
712 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
713 struct nfs_client
*clp
, u32 minorversion
)
715 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
717 /* Don't match clients that failed to initialise */
718 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
719 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
724 /* Match the version and minorversion */
725 if (clp
->rpc_ops
->version
!= 4 ||
726 clp
->cl_minorversion
!= minorversion
)
729 /* Match only the IP address, not the port number */
730 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
737 * NFSv4.1 callback thread helper
738 * For CB_COMPOUND calls, find a client by IP address, protocol version,
739 * minorversion, and sessionID
741 * Returns NULL if no such client
744 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
745 struct nfs4_sessionid
*sid
, u32 minorversion
)
747 struct nfs_client
*clp
;
748 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
750 spin_lock(&nn
->nfs_client_lock
);
751 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
752 if (nfs4_cb_match_client(addr
, clp
, minorversion
) == false)
755 if (!nfs4_has_session(clp
))
759 if (memcmp(clp
->cl_session
->sess_id
.data
,
760 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
763 atomic_inc(&clp
->cl_count
);
764 spin_unlock(&nn
->nfs_client_lock
);
767 spin_unlock(&nn
->nfs_client_lock
);
771 #else /* CONFIG_NFS_V4_1 */
774 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
775 struct nfs4_sessionid
*sid
, u32 minorversion
)
779 #endif /* CONFIG_NFS_V4_1 */
782 * Set up an NFS4 client
784 static int nfs4_set_client(struct nfs_server
*server
,
785 const char *hostname
,
786 const struct sockaddr
*addr
,
787 const size_t addrlen
,
789 rpc_authflavor_t authflavour
,
790 int proto
, const struct rpc_timeout
*timeparms
,
791 u32 minorversion
, struct net
*net
)
793 struct nfs_client_initdata cl_init
= {
794 .hostname
= hostname
,
799 .minorversion
= minorversion
,
802 struct nfs_client
*clp
;
805 dprintk("--> nfs4_set_client()\n");
807 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
808 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
809 if (server
->options
& NFS_OPTION_MIGRATION
)
810 set_bit(NFS_CS_MIGRATION
, &cl_init
.init_flags
);
812 /* Allocate or find a client reference we can use */
813 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
815 error
= PTR_ERR(clp
);
820 * Query for the lease time on clientid setup or renewal
822 * Note that this will be set on nfs_clients that were created
823 * only for the DS role and did not set this bit, but now will
826 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
828 server
->nfs_client
= clp
;
829 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
832 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
837 * Set up a pNFS Data Server client.
839 * Return any existing nfs_client that matches server address,port,version
842 * For a new nfs_client, use a soft mount (default), a low retrans and a
843 * low timeout interval so that if a connection is lost, we retry through
846 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
847 const struct sockaddr
*ds_addr
, int ds_addrlen
,
848 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
850 struct nfs_client_initdata cl_init
= {
852 .addrlen
= ds_addrlen
,
855 .minorversion
= mds_clp
->cl_minorversion
,
856 .net
= mds_clp
->cl_net
,
858 struct rpc_timeout ds_timeout
;
859 struct nfs_client
*clp
;
860 char buf
[INET6_ADDRSTRLEN
+ 1];
862 if (rpc_ntop(ds_addr
, buf
, sizeof(buf
)) <= 0)
863 return ERR_PTR(-EINVAL
);
864 cl_init
.hostname
= buf
;
867 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
868 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
869 * (section 13.1 RFC 5661).
871 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
872 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
873 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
875 dprintk("<-- %s %p\n", __func__
, clp
);
878 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
881 * Session has been established, and the client marked ready.
882 * Set the mount rsize and wsize with negotiated fore channel
883 * attributes which will be bound checked in nfs_server_set_fsinfo.
885 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
887 #ifdef CONFIG_NFS_V4_1
888 struct nfs4_session
*sess
;
892 if (!nfs4_has_session(server
->nfs_client
))
894 sess
= server
->nfs_client
->cl_session
;
895 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
896 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
898 if (server
->rsize
> server_resp_sz
)
899 server
->rsize
= server_resp_sz
;
900 if (server
->wsize
> server_rqst_sz
)
901 server
->wsize
= server_rqst_sz
;
902 #endif /* CONFIG_NFS_V4_1 */
905 static int nfs4_server_common_setup(struct nfs_server
*server
,
906 struct nfs_fh
*mntfh
, bool auth_probe
)
908 struct nfs_fattr
*fattr
;
911 /* data servers support only a subset of NFSv4.1 */
912 if (is_ds_only_client(server
->nfs_client
))
913 return -EPROTONOSUPPORT
;
915 fattr
= nfs_alloc_fattr();
919 /* We must ensure the session is initialised first */
920 error
= nfs4_init_session(server
->nfs_client
);
924 /* Set the basic capabilities */
925 server
->caps
|= server
->nfs_client
->cl_mvops
->init_caps
;
926 if (server
->flags
& NFS_MOUNT_NORDIRPLUS
)
927 server
->caps
&= ~NFS_CAP_READDIRPLUS
;
929 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
932 if (nfs4_disable_idmapping
&&
933 server
->client
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
934 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
937 /* Probe the root fh to retrieve its FSID and filehandle */
938 error
= nfs4_get_rootfh(server
, mntfh
, auth_probe
);
942 dprintk("Server FSID: %llx:%llx\n",
943 (unsigned long long) server
->fsid
.major
,
944 (unsigned long long) server
->fsid
.minor
);
945 nfs_display_fhandle(mntfh
, "Pseudo-fs root FH");
947 nfs4_session_set_rwsize(server
);
949 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
953 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
954 server
->namelen
= NFS4_MAXNAMLEN
;
956 nfs_server_insert_lists(server
);
957 server
->mount_time
= jiffies
;
958 server
->destroy
= nfs4_destroy_server
;
960 nfs_free_fattr(fattr
);
965 * Create a version 4 volume record
967 static int nfs4_init_server(struct nfs_server
*server
,
968 struct nfs_parsed_mount_data
*data
)
970 struct rpc_timeout timeparms
;
973 dprintk("--> nfs4_init_server()\n");
975 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
976 data
->timeo
, data
->retrans
);
978 /* Initialise the client representation from the mount data */
979 server
->flags
= data
->flags
;
980 server
->options
= data
->options
;
981 server
->auth_info
= data
->auth_info
;
983 /* Use the first specified auth flavor. If this flavor isn't
984 * allowed by the server, use the SECINFO path to try the
985 * other specified flavors */
986 if (data
->auth_info
.flavor_len
>= 1)
987 data
->selected_flavor
= data
->auth_info
.flavors
[0];
989 data
->selected_flavor
= RPC_AUTH_UNIX
;
991 /* Get a client record */
992 error
= nfs4_set_client(server
,
993 data
->nfs_server
.hostname
,
994 (const struct sockaddr
*)&data
->nfs_server
.address
,
995 data
->nfs_server
.addrlen
,
996 data
->client_address
,
997 data
->selected_flavor
,
998 data
->nfs_server
.protocol
,
1006 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1008 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1010 server
->acregmin
= data
->acregmin
* HZ
;
1011 server
->acregmax
= data
->acregmax
* HZ
;
1012 server
->acdirmin
= data
->acdirmin
* HZ
;
1013 server
->acdirmax
= data
->acdirmax
* HZ
;
1015 server
->port
= data
->nfs_server
.port
;
1017 error
= nfs_init_server_rpcclient(server
, &timeparms
,
1018 data
->selected_flavor
);
1022 dprintk("<-- nfs4_init_server() = %d\n", error
);
1027 * Create a version 4 volume record
1028 * - keyed on server and FSID
1030 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1031 struct nfs_fh *mntfh)*/
1032 struct nfs_server
*nfs4_create_server(struct nfs_mount_info
*mount_info
,
1033 struct nfs_subversion
*nfs_mod
)
1035 struct nfs_server
*server
;
1039 dprintk("--> nfs4_create_server()\n");
1041 server
= nfs_alloc_server();
1043 return ERR_PTR(-ENOMEM
);
1045 auth_probe
= mount_info
->parsed
->auth_info
.flavor_len
< 1;
1047 /* set up the general RPC client */
1048 error
= nfs4_init_server(server
, mount_info
->parsed
);
1052 error
= nfs4_server_common_setup(server
, mount_info
->mntfh
, auth_probe
);
1056 dprintk("<-- nfs4_create_server() = %p\n", server
);
1060 nfs_free_server(server
);
1061 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1062 return ERR_PTR(error
);
1066 * Create an NFS4 referral server record
1068 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1069 struct nfs_fh
*mntfh
)
1071 struct nfs_client
*parent_client
;
1072 struct nfs_server
*server
, *parent_server
;
1076 dprintk("--> nfs4_create_referral_server()\n");
1078 server
= nfs_alloc_server();
1080 return ERR_PTR(-ENOMEM
);
1082 parent_server
= NFS_SB(data
->sb
);
1083 parent_client
= parent_server
->nfs_client
;
1085 /* Initialise the client representation from the parent server */
1086 nfs_server_copy_userdata(server
, parent_server
);
1088 /* Get a client representation.
1089 * Note: NFSv4 always uses TCP, */
1090 error
= nfs4_set_client(server
, data
->hostname
,
1093 parent_client
->cl_ipaddr
,
1095 rpc_protocol(parent_server
->client
),
1096 parent_server
->client
->cl_timeout
,
1097 parent_client
->cl_mvops
->minor_version
,
1098 parent_client
->cl_net
);
1102 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1106 auth_probe
= parent_server
->auth_info
.flavor_len
< 1;
1108 error
= nfs4_server_common_setup(server
, mntfh
, auth_probe
);
1112 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1116 nfs_free_server(server
);
1117 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1118 return ERR_PTR(error
);
1122 * Grab the destination's particulars, including lease expiry time.
1124 * Returns zero if probe succeeded and retrieved FSID matches the FSID
1127 static int nfs_probe_destination(struct nfs_server
*server
)
1129 struct inode
*inode
= server
->super
->s_root
->d_inode
;
1130 struct nfs_fattr
*fattr
;
1133 fattr
= nfs_alloc_fattr();
1137 /* Sanity: the probe won't work if the destination server
1138 * does not recognize the migrated FH. */
1139 error
= nfs_probe_fsinfo(server
, NFS_FH(inode
), fattr
);
1141 nfs_free_fattr(fattr
);
1146 * nfs4_update_server - Move an nfs_server to a different nfs_client
1148 * @server: represents FSID to be moved
1149 * @hostname: new end-point's hostname
1150 * @sap: new end-point's socket address
1151 * @salen: size of "sap"
1152 * @net: net namespace
1154 * The nfs_server must be quiescent before this function is invoked.
1155 * Either its session is drained (NFSv4.1+), or its transport is
1156 * plugged and drained (NFSv4.0).
1158 * Returns zero on success, or a negative errno value.
1160 int nfs4_update_server(struct nfs_server
*server
, const char *hostname
,
1161 struct sockaddr
*sap
, size_t salen
, struct net
*net
)
1163 struct nfs_client
*clp
= server
->nfs_client
;
1164 struct rpc_clnt
*clnt
= server
->client
;
1165 struct xprt_create xargs
= {
1166 .ident
= clp
->cl_proto
,
1170 .servername
= hostname
,
1172 char buf
[INET6_ADDRSTRLEN
+ 1];
1173 struct sockaddr_storage address
;
1174 struct sockaddr
*localaddr
= (struct sockaddr
*)&address
;
1177 dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__
,
1178 (unsigned long long)server
->fsid
.major
,
1179 (unsigned long long)server
->fsid
.minor
,
1182 error
= rpc_switch_client_transport(clnt
, &xargs
, clnt
->cl_timeout
);
1184 dprintk("<-- %s(): rpc_switch_client_transport returned %d\n",
1189 error
= rpc_localaddr(clnt
, localaddr
, sizeof(address
));
1191 dprintk("<-- %s(): rpc_localaddr returned %d\n",
1196 error
= -EAFNOSUPPORT
;
1197 if (rpc_ntop(localaddr
, buf
, sizeof(buf
)) == 0) {
1198 dprintk("<-- %s(): rpc_ntop returned %d\n",
1203 nfs_server_remove_lists(server
);
1204 error
= nfs4_set_client(server
, hostname
, sap
, salen
, buf
,
1205 clp
->cl_rpcclient
->cl_auth
->au_flavor
,
1206 clp
->cl_proto
, clnt
->cl_timeout
,
1207 clp
->cl_minorversion
, net
);
1208 nfs_put_client(clp
);
1210 nfs_server_insert_lists(server
);
1211 dprintk("<-- %s(): nfs4_set_client returned %d\n",
1216 if (server
->nfs_client
->cl_hostname
== NULL
)
1217 server
->nfs_client
->cl_hostname
= kstrdup(hostname
, GFP_KERNEL
);
1218 nfs_server_insert_lists(server
);
1220 error
= nfs_probe_destination(server
);
1224 dprintk("<-- %s() succeeded\n", __func__
);