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_mount.h>
8 #include <linux/sunrpc/addr.h>
9 #include <linux/sunrpc/auth.h>
10 #include <linux/sunrpc/xprt.h>
11 #include <linux/sunrpc/bc_xprt.h>
12 #include <linux/sunrpc/rpc_pipe_fs.h>
15 #include "delegation.h"
16 #include "nfs4session.h"
17 #include "nfs4idmap.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
, 1, 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
);
231 kfree(clp
->cl_owner_id
);
234 void nfs4_free_client(struct nfs_client
*clp
)
236 nfs4_shutdown_client(clp
);
237 nfs_free_client(clp
);
241 * Initialize the NFS4 callback service
243 static int nfs4_init_callback(struct nfs_client
*clp
)
245 struct rpc_xprt
*xprt
;
248 xprt
= rcu_dereference_raw(clp
->cl_rpcclient
->cl_xprt
);
250 if (nfs4_has_session(clp
)) {
251 error
= xprt_setup_backchannel(xprt
, 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
);
373 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_GSS_KRB5I
);
374 if (error
== -EINVAL
)
375 error
= nfs_create_rpc_client(clp
, timeparms
, RPC_AUTH_UNIX
);
379 /* If no clientaddr= option was specified, find a usable cb address */
380 if (ip_addr
== NULL
) {
381 struct sockaddr_storage cb_addr
;
382 struct sockaddr
*sap
= (struct sockaddr
*)&cb_addr
;
384 error
= rpc_localaddr(clp
->cl_rpcclient
, sap
, sizeof(cb_addr
));
387 error
= rpc_ntop(sap
, buf
, sizeof(buf
));
390 ip_addr
= (const char *)buf
;
392 strlcpy(clp
->cl_ipaddr
, ip_addr
, sizeof(clp
->cl_ipaddr
));
394 error
= nfs_idmap_new(clp
);
396 dprintk("%s: failed to create idmapper. Error = %d\n",
400 __set_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
);
402 error
= nfs4_init_client_minor_version(clp
);
406 if (!nfs4_has_session(clp
))
407 nfs_mark_client_ready(clp
, NFS_CS_READY
);
409 error
= nfs4_discover_server_trunking(clp
, &old
);
414 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
);
456 static bool nfs4_match_client_owner_id(const struct nfs_client
*clp1
,
457 const struct nfs_client
*clp2
)
459 if (clp1
->cl_owner_id
== NULL
|| clp2
->cl_owner_id
== NULL
)
461 return strcmp(clp1
->cl_owner_id
, clp2
->cl_owner_id
) == 0;
465 * nfs40_walk_client_list - Find server that recognizes a client ID
467 * @new: nfs_client with client ID to test
468 * @result: OUT: found nfs_client, or new
469 * @cred: credential to use for trunking test
471 * Returns zero, a negative errno, or a negative NFS4ERR status.
472 * If zero is returned, an nfs_client pointer is planted in "result."
474 * NB: nfs40_walk_client_list() relies on the new nfs_client being
475 * the last nfs_client on the list.
477 int nfs40_walk_client_list(struct nfs_client
*new,
478 struct nfs_client
**result
,
479 struct rpc_cred
*cred
)
481 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
482 struct nfs_client
*pos
, *prev
= NULL
;
483 struct nfs4_setclientid_res clid
= {
484 .clientid
= new->cl_clientid
,
485 .confirm
= new->cl_confirm
,
487 int status
= -NFS4ERR_STALE_CLIENTID
;
489 spin_lock(&nn
->nfs_client_lock
);
490 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
492 if (pos
->rpc_ops
!= new->rpc_ops
)
495 if (pos
->cl_minorversion
!= new->cl_minorversion
)
498 /* If "pos" isn't marked ready, we can't trust the
499 * remaining fields in "pos" */
500 if (pos
->cl_cons_state
> NFS_CS_READY
) {
501 atomic_inc(&pos
->cl_count
);
502 spin_unlock(&nn
->nfs_client_lock
);
504 nfs_put_client(prev
);
507 status
= nfs_wait_client_init_complete(pos
);
510 status
= -NFS4ERR_STALE_CLIENTID
;
511 spin_lock(&nn
->nfs_client_lock
);
513 if (pos
->cl_cons_state
!= NFS_CS_READY
)
516 if (pos
->cl_clientid
!= new->cl_clientid
)
519 if (!nfs4_match_client_owner_id(pos
, new))
522 atomic_inc(&pos
->cl_count
);
523 spin_unlock(&nn
->nfs_client_lock
);
525 nfs_put_client(prev
);
528 status
= nfs4_proc_setclientid_confirm(pos
, &clid
, cred
);
530 case -NFS4ERR_STALE_CLIENTID
:
533 nfs4_swap_callback_idents(pos
, new);
537 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
538 __func__
, pos
, atomic_read(&pos
->cl_count
));
542 /* The callback path may have been inadvertently
543 * changed. Schedule recovery!
545 nfs4_schedule_path_down_recovery(pos
);
550 spin_lock(&nn
->nfs_client_lock
);
552 spin_unlock(&nn
->nfs_client_lock
);
554 /* No match found. The server lost our clientid */
556 nfs_put_client(prev
);
557 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
561 #ifdef CONFIG_NFS_V4_1
563 * Returns true if the client IDs match
565 static bool nfs4_match_clientids(struct nfs_client
*a
, struct nfs_client
*b
)
567 if (a
->cl_clientid
!= b
->cl_clientid
) {
568 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
569 __func__
, a
->cl_clientid
, b
->cl_clientid
);
572 dprintk("NFS: --> %s client ID %llx matches %llx\n",
573 __func__
, a
->cl_clientid
, b
->cl_clientid
);
578 * Returns true if the server major ids match
581 nfs4_check_clientid_trunking(struct nfs_client
*a
, struct nfs_client
*b
)
583 struct nfs41_server_owner
*o1
= a
->cl_serverowner
;
584 struct nfs41_server_owner
*o2
= b
->cl_serverowner
;
586 if (o1
->major_id_sz
!= o2
->major_id_sz
)
587 goto out_major_mismatch
;
588 if (memcmp(o1
->major_id
, o2
->major_id
, o1
->major_id_sz
) != 0)
589 goto out_major_mismatch
;
591 dprintk("NFS: --> %s server owners match\n", __func__
);
595 dprintk("NFS: --> %s server owner major IDs do not match\n",
601 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
603 * @new: nfs_client with client ID to test
604 * @result: OUT: found nfs_client, or new
605 * @cred: credential to use for trunking test
607 * Returns zero, a negative errno, or a negative NFS4ERR status.
608 * If zero is returned, an nfs_client pointer is planted in "result."
610 * NB: nfs41_walk_client_list() relies on the new nfs_client being
611 * the last nfs_client on the list.
613 int nfs41_walk_client_list(struct nfs_client
*new,
614 struct nfs_client
**result
,
615 struct rpc_cred
*cred
)
617 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
618 struct nfs_client
*pos
, *prev
= NULL
;
619 int status
= -NFS4ERR_STALE_CLIENTID
;
621 spin_lock(&nn
->nfs_client_lock
);
622 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
627 if (pos
->rpc_ops
!= new->rpc_ops
)
630 if (pos
->cl_minorversion
!= new->cl_minorversion
)
633 /* If "pos" isn't marked ready, we can't trust the
634 * remaining fields in "pos", especially the client
635 * ID and serverowner fields. Wait for CREATE_SESSION
637 if (pos
->cl_cons_state
> NFS_CS_READY
) {
638 atomic_inc(&pos
->cl_count
);
639 spin_unlock(&nn
->nfs_client_lock
);
641 nfs_put_client(prev
);
644 status
= nfs_wait_client_init_complete(pos
);
645 spin_lock(&nn
->nfs_client_lock
);
648 status
= -NFS4ERR_STALE_CLIENTID
;
650 if (pos
->cl_cons_state
!= NFS_CS_READY
)
653 if (!nfs4_match_clientids(pos
, new))
657 * Note that session trunking is just a special subcase of
658 * client id trunking. In either case, we want to fall back
659 * to using the existing nfs_client.
661 if (!nfs4_check_clientid_trunking(pos
, new))
664 /* Unlike NFSv4.0, we know that NFSv4.1 always uses the
665 * uniform string, however someone might switch the
666 * uniquifier string on us.
668 if (!nfs4_match_client_owner_id(pos
, new))
671 atomic_inc(&pos
->cl_count
);
674 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
675 __func__
, pos
, atomic_read(&pos
->cl_count
));
679 spin_unlock(&nn
->nfs_client_lock
);
680 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
681 nfs_put_client(prev
);
684 #endif /* CONFIG_NFS_V4_1 */
686 static void nfs4_destroy_server(struct nfs_server
*server
)
690 nfs_server_return_all_delegations(server
);
691 unset_pnfs_layoutdriver(server
);
692 nfs4_purge_state_owners(server
, &freeme
);
693 nfs4_free_state_owners(&freeme
);
697 * NFSv4.0 callback thread helper
699 * Find a client by callback identifier
702 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
704 struct nfs_client
*clp
;
705 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
707 spin_lock(&nn
->nfs_client_lock
);
708 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
710 atomic_inc(&clp
->cl_count
);
711 spin_unlock(&nn
->nfs_client_lock
);
715 #if defined(CONFIG_NFS_V4_1)
716 /* Common match routine for v4.0 and v4.1 callback services */
717 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
718 struct nfs_client
*clp
, u32 minorversion
)
720 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
722 /* Don't match clients that failed to initialise */
723 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
724 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
729 /* Match the version and minorversion */
730 if (clp
->rpc_ops
->version
!= 4 ||
731 clp
->cl_minorversion
!= minorversion
)
734 /* Match only the IP address, not the port number */
735 return rpc_cmp_addr(addr
, clap
);
739 * NFSv4.1 callback thread helper
740 * For CB_COMPOUND calls, find a client by IP address, protocol version,
741 * minorversion, and sessionID
743 * Returns NULL if no such client
746 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
747 struct nfs4_sessionid
*sid
, u32 minorversion
)
749 struct nfs_client
*clp
;
750 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
752 spin_lock(&nn
->nfs_client_lock
);
753 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
754 if (!nfs4_cb_match_client(addr
, clp
, minorversion
))
757 if (!nfs4_has_session(clp
))
761 if (memcmp(clp
->cl_session
->sess_id
.data
,
762 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
765 atomic_inc(&clp
->cl_count
);
766 spin_unlock(&nn
->nfs_client_lock
);
769 spin_unlock(&nn
->nfs_client_lock
);
773 #else /* CONFIG_NFS_V4_1 */
776 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
777 struct nfs4_sessionid
*sid
, u32 minorversion
)
781 #endif /* CONFIG_NFS_V4_1 */
784 * Set up an NFS4 client
786 static int nfs4_set_client(struct nfs_server
*server
,
787 const char *hostname
,
788 const struct sockaddr
*addr
,
789 const size_t addrlen
,
791 rpc_authflavor_t authflavour
,
792 int proto
, const struct rpc_timeout
*timeparms
,
793 u32 minorversion
, struct net
*net
)
795 struct nfs_client_initdata cl_init
= {
796 .hostname
= hostname
,
801 .minorversion
= minorversion
,
804 struct nfs_client
*clp
;
807 dprintk("--> nfs4_set_client()\n");
809 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
810 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
811 if (server
->options
& NFS_OPTION_MIGRATION
)
812 set_bit(NFS_CS_MIGRATION
, &cl_init
.init_flags
);
814 /* Allocate or find a client reference we can use */
815 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
817 error
= PTR_ERR(clp
);
822 * Query for the lease time on clientid setup or renewal
824 * Note that this will be set on nfs_clients that were created
825 * only for the DS role and did not set this bit, but now will
828 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
830 server
->nfs_client
= clp
;
831 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
834 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
839 * Set up a pNFS Data Server client.
841 * Return any existing nfs_client that matches server address,port,version
844 * For a new nfs_client, use a soft mount (default), a low retrans and a
845 * low timeout interval so that if a connection is lost, we retry through
848 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
849 const struct sockaddr
*ds_addr
, int ds_addrlen
,
850 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
,
851 u32 minor_version
, rpc_authflavor_t au_flavor
)
853 struct nfs_client_initdata cl_init
= {
855 .addrlen
= ds_addrlen
,
858 .minorversion
= minor_version
,
859 .net
= mds_clp
->cl_net
,
861 struct rpc_timeout ds_timeout
;
862 struct nfs_client
*clp
;
863 char buf
[INET6_ADDRSTRLEN
+ 1];
865 if (rpc_ntop(ds_addr
, buf
, sizeof(buf
)) <= 0)
866 return ERR_PTR(-EINVAL
);
867 cl_init
.hostname
= buf
;
870 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
871 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
872 * (section 13.1 RFC 5661).
874 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
875 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
878 dprintk("<-- %s %p\n", __func__
, clp
);
881 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
884 * Session has been established, and the client marked ready.
885 * Limit the mount rsize, wsize and dtsize using negotiated fore
886 * channel attributes.
888 static void nfs4_session_limit_rwsize(struct nfs_server
*server
)
890 #ifdef CONFIG_NFS_V4_1
891 struct nfs4_session
*sess
;
895 if (!nfs4_has_session(server
->nfs_client
))
897 sess
= server
->nfs_client
->cl_session
;
898 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
899 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
901 if (server
->dtsize
> server_resp_sz
)
902 server
->dtsize
= server_resp_sz
;
903 if (server
->rsize
> server_resp_sz
)
904 server
->rsize
= server_resp_sz
;
905 if (server
->wsize
> server_rqst_sz
)
906 server
->wsize
= server_rqst_sz
;
907 #endif /* CONFIG_NFS_V4_1 */
910 static int nfs4_server_common_setup(struct nfs_server
*server
,
911 struct nfs_fh
*mntfh
, bool auth_probe
)
913 struct nfs_fattr
*fattr
;
916 /* data servers support only a subset of NFSv4.1 */
917 if (is_ds_only_client(server
->nfs_client
))
918 return -EPROTONOSUPPORT
;
920 fattr
= nfs_alloc_fattr();
924 /* We must ensure the session is initialised first */
925 error
= nfs4_init_session(server
->nfs_client
);
929 /* Set the basic capabilities */
930 server
->caps
|= server
->nfs_client
->cl_mvops
->init_caps
;
931 if (server
->flags
& NFS_MOUNT_NORDIRPLUS
)
932 server
->caps
&= ~NFS_CAP_READDIRPLUS
;
934 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
937 if (nfs4_disable_idmapping
&&
938 server
->client
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
939 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
942 /* Probe the root fh to retrieve its FSID and filehandle */
943 error
= nfs4_get_rootfh(server
, mntfh
, auth_probe
);
947 dprintk("Server FSID: %llx:%llx\n",
948 (unsigned long long) server
->fsid
.major
,
949 (unsigned long long) server
->fsid
.minor
);
950 nfs_display_fhandle(mntfh
, "Pseudo-fs root FH");
952 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
956 nfs4_session_limit_rwsize(server
);
958 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
959 server
->namelen
= NFS4_MAXNAMLEN
;
961 nfs_server_insert_lists(server
);
962 server
->mount_time
= jiffies
;
963 server
->destroy
= nfs4_destroy_server
;
965 nfs_free_fattr(fattr
);
970 * Create a version 4 volume record
972 static int nfs4_init_server(struct nfs_server
*server
,
973 struct nfs_parsed_mount_data
*data
)
975 struct rpc_timeout timeparms
;
978 dprintk("--> nfs4_init_server()\n");
980 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
981 data
->timeo
, data
->retrans
);
983 /* Initialise the client representation from the mount data */
984 server
->flags
= data
->flags
;
985 server
->options
= data
->options
;
986 server
->auth_info
= data
->auth_info
;
988 /* Use the first specified auth flavor. If this flavor isn't
989 * allowed by the server, use the SECINFO path to try the
990 * other specified flavors */
991 if (data
->auth_info
.flavor_len
>= 1)
992 data
->selected_flavor
= data
->auth_info
.flavors
[0];
994 data
->selected_flavor
= RPC_AUTH_UNIX
;
996 /* Get a client record */
997 error
= nfs4_set_client(server
,
998 data
->nfs_server
.hostname
,
999 (const struct sockaddr
*)&data
->nfs_server
.address
,
1000 data
->nfs_server
.addrlen
,
1001 data
->client_address
,
1002 data
->selected_flavor
,
1003 data
->nfs_server
.protocol
,
1011 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
1013 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
1015 server
->acregmin
= data
->acregmin
* HZ
;
1016 server
->acregmax
= data
->acregmax
* HZ
;
1017 server
->acdirmin
= data
->acdirmin
* HZ
;
1018 server
->acdirmax
= data
->acdirmax
* HZ
;
1020 server
->port
= data
->nfs_server
.port
;
1022 error
= nfs_init_server_rpcclient(server
, &timeparms
,
1023 data
->selected_flavor
);
1027 dprintk("<-- nfs4_init_server() = %d\n", error
);
1032 * Create a version 4 volume record
1033 * - keyed on server and FSID
1035 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1036 struct nfs_fh *mntfh)*/
1037 struct nfs_server
*nfs4_create_server(struct nfs_mount_info
*mount_info
,
1038 struct nfs_subversion
*nfs_mod
)
1040 struct nfs_server
*server
;
1044 dprintk("--> nfs4_create_server()\n");
1046 server
= nfs_alloc_server();
1048 return ERR_PTR(-ENOMEM
);
1050 auth_probe
= mount_info
->parsed
->auth_info
.flavor_len
< 1;
1052 /* set up the general RPC client */
1053 error
= nfs4_init_server(server
, mount_info
->parsed
);
1057 error
= nfs4_server_common_setup(server
, mount_info
->mntfh
, auth_probe
);
1061 dprintk("<-- nfs4_create_server() = %p\n", server
);
1065 nfs_free_server(server
);
1066 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1067 return ERR_PTR(error
);
1071 * Create an NFS4 referral server record
1073 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1074 struct nfs_fh
*mntfh
)
1076 struct nfs_client
*parent_client
;
1077 struct nfs_server
*server
, *parent_server
;
1081 dprintk("--> nfs4_create_referral_server()\n");
1083 server
= nfs_alloc_server();
1085 return ERR_PTR(-ENOMEM
);
1087 parent_server
= NFS_SB(data
->sb
);
1088 parent_client
= parent_server
->nfs_client
;
1090 /* Initialise the client representation from the parent server */
1091 nfs_server_copy_userdata(server
, parent_server
);
1093 /* Get a client representation.
1094 * Note: NFSv4 always uses TCP, */
1095 error
= nfs4_set_client(server
, data
->hostname
,
1098 parent_client
->cl_ipaddr
,
1100 rpc_protocol(parent_server
->client
),
1101 parent_server
->client
->cl_timeout
,
1102 parent_client
->cl_mvops
->minor_version
,
1103 parent_client
->cl_net
);
1107 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1111 auth_probe
= parent_server
->auth_info
.flavor_len
< 1;
1113 error
= nfs4_server_common_setup(server
, mntfh
, auth_probe
);
1117 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1121 nfs_free_server(server
);
1122 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1123 return ERR_PTR(error
);
1127 * Grab the destination's particulars, including lease expiry time.
1129 * Returns zero if probe succeeded and retrieved FSID matches the FSID
1132 static int nfs_probe_destination(struct nfs_server
*server
)
1134 struct inode
*inode
= d_inode(server
->super
->s_root
);
1135 struct nfs_fattr
*fattr
;
1138 fattr
= nfs_alloc_fattr();
1142 /* Sanity: the probe won't work if the destination server
1143 * does not recognize the migrated FH. */
1144 error
= nfs_probe_fsinfo(server
, NFS_FH(inode
), fattr
);
1146 nfs_free_fattr(fattr
);
1151 * nfs4_update_server - Move an nfs_server to a different nfs_client
1153 * @server: represents FSID to be moved
1154 * @hostname: new end-point's hostname
1155 * @sap: new end-point's socket address
1156 * @salen: size of "sap"
1157 * @net: net namespace
1159 * The nfs_server must be quiescent before this function is invoked.
1160 * Either its session is drained (NFSv4.1+), or its transport is
1161 * plugged and drained (NFSv4.0).
1163 * Returns zero on success, or a negative errno value.
1165 int nfs4_update_server(struct nfs_server
*server
, const char *hostname
,
1166 struct sockaddr
*sap
, size_t salen
, struct net
*net
)
1168 struct nfs_client
*clp
= server
->nfs_client
;
1169 struct rpc_clnt
*clnt
= server
->client
;
1170 struct xprt_create xargs
= {
1171 .ident
= clp
->cl_proto
,
1175 .servername
= hostname
,
1177 char buf
[INET6_ADDRSTRLEN
+ 1];
1178 struct sockaddr_storage address
;
1179 struct sockaddr
*localaddr
= (struct sockaddr
*)&address
;
1182 dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__
,
1183 (unsigned long long)server
->fsid
.major
,
1184 (unsigned long long)server
->fsid
.minor
,
1187 error
= rpc_switch_client_transport(clnt
, &xargs
, clnt
->cl_timeout
);
1189 dprintk("<-- %s(): rpc_switch_client_transport returned %d\n",
1194 error
= rpc_localaddr(clnt
, localaddr
, sizeof(address
));
1196 dprintk("<-- %s(): rpc_localaddr returned %d\n",
1201 error
= -EAFNOSUPPORT
;
1202 if (rpc_ntop(localaddr
, buf
, sizeof(buf
)) == 0) {
1203 dprintk("<-- %s(): rpc_ntop returned %d\n",
1208 nfs_server_remove_lists(server
);
1209 error
= nfs4_set_client(server
, hostname
, sap
, salen
, buf
,
1210 clp
->cl_rpcclient
->cl_auth
->au_flavor
,
1211 clp
->cl_proto
, clnt
->cl_timeout
,
1212 clp
->cl_minorversion
, net
);
1213 nfs_put_client(clp
);
1215 nfs_server_insert_lists(server
);
1216 dprintk("<-- %s(): nfs4_set_client returned %d\n",
1221 if (server
->nfs_client
->cl_hostname
== NULL
)
1222 server
->nfs_client
->cl_hostname
= kstrdup(hostname
, GFP_KERNEL
);
1223 nfs_server_insert_lists(server
);
1225 error
= nfs_probe_destination(server
);
1229 dprintk("<-- %s() succeeded\n", __func__
);