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
];
204 nfs_free_client(clp
);
209 * Destroy the NFS4 callback service
211 static void nfs4_destroy_callback(struct nfs_client
*clp
)
213 if (__test_and_clear_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
))
214 nfs_callback_down(clp
->cl_mvops
->minor_version
, clp
->cl_net
);
217 static void nfs4_shutdown_client(struct nfs_client
*clp
)
219 if (__test_and_clear_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
))
220 nfs4_kill_renewd(clp
);
221 clp
->cl_mvops
->shutdown_client(clp
);
222 nfs4_destroy_callback(clp
);
223 if (__test_and_clear_bit(NFS_CS_IDMAP
, &clp
->cl_res_state
))
224 nfs_idmap_delete(clp
);
226 rpc_destroy_wait_queue(&clp
->cl_rpcwaitq
);
227 kfree(clp
->cl_serverowner
);
228 kfree(clp
->cl_serverscope
);
229 kfree(clp
->cl_implid
);
232 void nfs4_free_client(struct nfs_client
*clp
)
234 nfs4_shutdown_client(clp
);
235 nfs_free_client(clp
);
239 * Initialize the NFS4 callback service
241 static int nfs4_init_callback(struct nfs_client
*clp
)
245 if (clp
->rpc_ops
->version
== 4) {
246 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
,
252 NFS41_BC_MIN_CALLBACKS
);
257 error
= nfs_callback_up(clp
->cl_mvops
->minor_version
, xprt
);
259 dprintk("%s: failed to start callback. Error = %d\n",
263 __set_bit(NFS_CS_CALLBACK
, &clp
->cl_res_state
);
269 * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
270 * @clp - nfs_client to initialize
272 * Returns zero on success, or a negative errno if some error occurred.
274 int nfs40_init_client(struct nfs_client
*clp
)
276 struct nfs4_slot_table
*tbl
;
279 tbl
= kzalloc(sizeof(*tbl
), GFP_NOFS
);
283 ret
= nfs4_setup_slot_table(tbl
, NFS4_MAX_SLOT_TABLE
,
284 "NFSv4.0 transport Slot table");
290 clp
->cl_slot_tbl
= tbl
;
294 #if defined(CONFIG_NFS_V4_1)
297 * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
298 * @clp - nfs_client to initialize
300 * Returns zero on success, or a negative errno if some error occurred.
302 int nfs41_init_client(struct nfs_client
*clp
)
304 struct nfs4_session
*session
= NULL
;
307 * Create the session and mark it expired.
308 * When a SEQUENCE operation encounters the expired session
309 * it will do session recovery to initialize it.
311 session
= nfs4_alloc_session(clp
);
315 clp
->cl_session
= session
;
318 * The create session reply races with the server back
319 * channel probe. Mark the client NFS_CS_SESSION_INITING
320 * so that the client back channel can find the
323 nfs_mark_client_ready(clp
, NFS_CS_SESSION_INITING
);
327 #endif /* CONFIG_NFS_V4_1 */
330 * Initialize the minor version specific parts of an NFS4 client record
332 static int nfs4_init_client_minor_version(struct nfs_client
*clp
)
336 ret
= clp
->cl_mvops
->init_client(clp
);
339 return nfs4_init_callback(clp
);
343 * nfs4_init_client - Initialise an NFS4 client record
345 * @clp: nfs_client to initialise
346 * @timeparms: timeout parameters for underlying RPC transport
347 * @ip_addr: callback IP address in presentation format
348 * @authflavor: authentication flavor for underlying RPC transport
350 * Returns pointer to an NFS client, or an ERR_PTR value.
352 struct nfs_client
*nfs4_init_client(struct nfs_client
*clp
,
353 const struct rpc_timeout
*timeparms
,
356 char buf
[INET6_ADDRSTRLEN
+ 1];
357 struct nfs_client
*old
;
360 if (clp
->cl_cons_state
== NFS_CS_READY
) {
361 /* the client is initialised already */
362 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp
);
366 /* Check NFS protocol revision and initialize RPC op vector */
367 clp
->rpc_ops
= &nfs_v4_clientops
;
369 if (clp
->cl_minorversion
!= 0)
370 __set_bit(NFS_CS_INFINITE_SLOTS
, &clp
->cl_flags
);
371 __set_bit(NFS_CS_DISCRTRY
, &clp
->cl_flags
);
372 __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;
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
) {
485 /* If "pos" isn't marked ready, we can't trust the
486 * remaining fields in "pos" */
487 if (pos
->cl_cons_state
> NFS_CS_READY
) {
488 atomic_inc(&pos
->cl_count
);
489 spin_unlock(&nn
->nfs_client_lock
);
492 nfs_put_client(prev
);
495 status
= nfs_wait_client_init_complete(pos
);
496 spin_lock(&nn
->nfs_client_lock
);
500 if (pos
->cl_cons_state
!= NFS_CS_READY
)
503 if (pos
->rpc_ops
!= new->rpc_ops
)
506 if (pos
->cl_proto
!= new->cl_proto
)
509 if (pos
->cl_minorversion
!= new->cl_minorversion
)
512 if (pos
->cl_clientid
!= new->cl_clientid
)
515 atomic_inc(&pos
->cl_count
);
516 spin_unlock(&nn
->nfs_client_lock
);
519 nfs_put_client(prev
);
522 status
= nfs4_proc_setclientid_confirm(pos
, &clid
, cred
);
524 case -NFS4ERR_STALE_CLIENTID
:
527 nfs4_swap_callback_idents(pos
, new);
531 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
532 __func__
, pos
, atomic_read(&pos
->cl_count
));
537 spin_lock(&nn
->nfs_client_lock
);
539 spin_unlock(&nn
->nfs_client_lock
);
541 /* No match found. The server lost our clientid */
544 nfs_put_client(prev
);
545 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
549 #ifdef CONFIG_NFS_V4_1
551 * Returns true if the client IDs match
553 static bool nfs4_match_clientids(struct nfs_client
*a
, struct nfs_client
*b
)
555 if (a
->cl_clientid
!= b
->cl_clientid
) {
556 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
557 __func__
, a
->cl_clientid
, b
->cl_clientid
);
560 dprintk("NFS: --> %s client ID %llx matches %llx\n",
561 __func__
, a
->cl_clientid
, b
->cl_clientid
);
566 * Returns true if the server owners match
569 nfs4_match_serverowners(struct nfs_client
*a
, struct nfs_client
*b
)
571 struct nfs41_server_owner
*o1
= a
->cl_serverowner
;
572 struct nfs41_server_owner
*o2
= b
->cl_serverowner
;
574 if (o1
->minor_id
!= o2
->minor_id
) {
575 dprintk("NFS: --> %s server owner minor IDs do not match\n",
580 if (o1
->major_id_sz
!= o2
->major_id_sz
)
581 goto out_major_mismatch
;
582 if (memcmp(o1
->major_id
, o2
->major_id
, o1
->major_id_sz
) != 0)
583 goto out_major_mismatch
;
585 dprintk("NFS: --> %s server owners match\n", __func__
);
589 dprintk("NFS: --> %s server owner major IDs do not match\n",
595 * nfs41_walk_client_list - Find nfs_client that matches a client/server owner
597 * @new: nfs_client with client ID to test
598 * @result: OUT: found nfs_client, or new
599 * @cred: credential to use for trunking test
601 * Returns zero, a negative errno, or a negative NFS4ERR status.
602 * If zero is returned, an nfs_client pointer is planted in "result."
604 * NB: nfs41_walk_client_list() relies on the new nfs_client being
605 * the last nfs_client on the list.
607 int nfs41_walk_client_list(struct nfs_client
*new,
608 struct nfs_client
**result
,
609 struct rpc_cred
*cred
)
611 struct nfs_net
*nn
= net_generic(new->cl_net
, nfs_net_id
);
612 struct nfs_client
*pos
, *prev
= NULL
;
613 int status
= -NFS4ERR_STALE_CLIENTID
;
615 spin_lock(&nn
->nfs_client_lock
);
616 list_for_each_entry(pos
, &nn
->nfs_client_list
, cl_share_link
) {
617 /* If "pos" isn't marked ready, we can't trust the
618 * remaining fields in "pos", especially the client
619 * ID and serverowner fields. Wait for CREATE_SESSION
621 if (pos
->cl_cons_state
> NFS_CS_READY
) {
622 atomic_inc(&pos
->cl_count
);
623 spin_unlock(&nn
->nfs_client_lock
);
626 nfs_put_client(prev
);
629 status
= nfs_wait_client_init_complete(pos
);
631 nfs4_schedule_lease_recovery(pos
);
632 status
= nfs4_wait_clnt_recover(pos
);
634 spin_lock(&nn
->nfs_client_lock
);
638 if (pos
->cl_cons_state
!= NFS_CS_READY
)
641 if (pos
->rpc_ops
!= new->rpc_ops
)
644 if (pos
->cl_proto
!= new->cl_proto
)
647 if (pos
->cl_minorversion
!= new->cl_minorversion
)
650 if (!nfs4_match_clientids(pos
, new))
653 if (!nfs4_match_serverowners(pos
, new))
656 atomic_inc(&pos
->cl_count
);
659 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
660 __func__
, pos
, atomic_read(&pos
->cl_count
));
664 /* No matching nfs_client found. */
665 spin_unlock(&nn
->nfs_client_lock
);
666 dprintk("NFS: <-- %s status = %d\n", __func__
, status
);
668 nfs_put_client(prev
);
671 #endif /* CONFIG_NFS_V4_1 */
673 static void nfs4_destroy_server(struct nfs_server
*server
)
675 nfs_server_return_all_delegations(server
);
676 unset_pnfs_layoutdriver(server
);
677 nfs4_purge_state_owners(server
);
681 * NFSv4.0 callback thread helper
683 * Find a client by callback identifier
686 nfs4_find_client_ident(struct net
*net
, int cb_ident
)
688 struct nfs_client
*clp
;
689 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
691 spin_lock(&nn
->nfs_client_lock
);
692 clp
= idr_find(&nn
->cb_ident_idr
, cb_ident
);
694 atomic_inc(&clp
->cl_count
);
695 spin_unlock(&nn
->nfs_client_lock
);
699 #if defined(CONFIG_NFS_V4_1)
700 /* Common match routine for v4.0 and v4.1 callback services */
701 static bool nfs4_cb_match_client(const struct sockaddr
*addr
,
702 struct nfs_client
*clp
, u32 minorversion
)
704 struct sockaddr
*clap
= (struct sockaddr
*)&clp
->cl_addr
;
706 /* Don't match clients that failed to initialise */
707 if (!(clp
->cl_cons_state
== NFS_CS_READY
||
708 clp
->cl_cons_state
== NFS_CS_SESSION_INITING
))
713 /* Match the version and minorversion */
714 if (clp
->rpc_ops
->version
!= 4 ||
715 clp
->cl_minorversion
!= minorversion
)
718 /* Match only the IP address, not the port number */
719 if (!nfs_sockaddr_match_ipaddr(addr
, clap
))
726 * NFSv4.1 callback thread helper
727 * For CB_COMPOUND calls, find a client by IP address, protocol version,
728 * minorversion, and sessionID
730 * Returns NULL if no such client
733 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
734 struct nfs4_sessionid
*sid
, u32 minorversion
)
736 struct nfs_client
*clp
;
737 struct nfs_net
*nn
= net_generic(net
, nfs_net_id
);
739 spin_lock(&nn
->nfs_client_lock
);
740 list_for_each_entry(clp
, &nn
->nfs_client_list
, cl_share_link
) {
741 if (nfs4_cb_match_client(addr
, clp
, minorversion
) == false)
744 if (!nfs4_has_session(clp
))
748 if (memcmp(clp
->cl_session
->sess_id
.data
,
749 sid
->data
, NFS4_MAX_SESSIONID_LEN
) != 0)
752 atomic_inc(&clp
->cl_count
);
753 spin_unlock(&nn
->nfs_client_lock
);
756 spin_unlock(&nn
->nfs_client_lock
);
760 #else /* CONFIG_NFS_V4_1 */
763 nfs4_find_client_sessionid(struct net
*net
, const struct sockaddr
*addr
,
764 struct nfs4_sessionid
*sid
, u32 minorversion
)
768 #endif /* CONFIG_NFS_V4_1 */
771 * Set up an NFS4 client
773 static int nfs4_set_client(struct nfs_server
*server
,
774 const char *hostname
,
775 const struct sockaddr
*addr
,
776 const size_t addrlen
,
778 rpc_authflavor_t authflavour
,
779 int proto
, const struct rpc_timeout
*timeparms
,
780 u32 minorversion
, struct net
*net
)
782 struct nfs_client_initdata cl_init
= {
783 .hostname
= hostname
,
788 .minorversion
= minorversion
,
791 struct nfs_client
*clp
;
794 dprintk("--> nfs4_set_client()\n");
796 if (server
->flags
& NFS_MOUNT_NORESVPORT
)
797 set_bit(NFS_CS_NORESVPORT
, &cl_init
.init_flags
);
798 if (server
->options
& NFS_OPTION_MIGRATION
)
799 set_bit(NFS_CS_MIGRATION
, &cl_init
.init_flags
);
801 /* Allocate or find a client reference we can use */
802 clp
= nfs_get_client(&cl_init
, timeparms
, ip_addr
, authflavour
);
804 error
= PTR_ERR(clp
);
809 * Query for the lease time on clientid setup or renewal
811 * Note that this will be set on nfs_clients that were created
812 * only for the DS role and did not set this bit, but now will
815 set_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
);
817 server
->nfs_client
= clp
;
818 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp
);
821 dprintk("<-- nfs4_set_client() = xerror %d\n", error
);
826 * Set up a pNFS Data Server client.
828 * Return any existing nfs_client that matches server address,port,version
831 * For a new nfs_client, use a soft mount (default), a low retrans and a
832 * low timeout interval so that if a connection is lost, we retry through
835 struct nfs_client
*nfs4_set_ds_client(struct nfs_client
* mds_clp
,
836 const struct sockaddr
*ds_addr
, int ds_addrlen
,
837 int ds_proto
, unsigned int ds_timeo
, unsigned int ds_retrans
)
839 struct nfs_client_initdata cl_init
= {
841 .addrlen
= ds_addrlen
,
844 .minorversion
= mds_clp
->cl_minorversion
,
845 .net
= mds_clp
->cl_net
,
847 struct rpc_timeout ds_timeout
;
848 struct nfs_client
*clp
;
851 * Set an authflavor equual to the MDS value. Use the MDS nfs_client
852 * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS
853 * (section 13.1 RFC 5661).
855 nfs_init_timeout_values(&ds_timeout
, ds_proto
, ds_timeo
, ds_retrans
);
856 clp
= nfs_get_client(&cl_init
, &ds_timeout
, mds_clp
->cl_ipaddr
,
857 mds_clp
->cl_rpcclient
->cl_auth
->au_flavor
);
859 dprintk("<-- %s %p\n", __func__
, clp
);
862 EXPORT_SYMBOL_GPL(nfs4_set_ds_client
);
865 * Session has been established, and the client marked ready.
866 * Set the mount rsize and wsize with negotiated fore channel
867 * attributes which will be bound checked in nfs_server_set_fsinfo.
869 static void nfs4_session_set_rwsize(struct nfs_server
*server
)
871 #ifdef CONFIG_NFS_V4_1
872 struct nfs4_session
*sess
;
876 if (!nfs4_has_session(server
->nfs_client
))
878 sess
= server
->nfs_client
->cl_session
;
879 server_resp_sz
= sess
->fc_attrs
.max_resp_sz
- nfs41_maxread_overhead
;
880 server_rqst_sz
= sess
->fc_attrs
.max_rqst_sz
- nfs41_maxwrite_overhead
;
882 if (server
->rsize
> server_resp_sz
)
883 server
->rsize
= server_resp_sz
;
884 if (server
->wsize
> server_rqst_sz
)
885 server
->wsize
= server_rqst_sz
;
886 #endif /* CONFIG_NFS_V4_1 */
889 static int nfs4_server_common_setup(struct nfs_server
*server
,
890 struct nfs_fh
*mntfh
, bool auth_probe
)
892 struct nfs_fattr
*fattr
;
895 /* data servers support only a subset of NFSv4.1 */
896 if (is_ds_only_client(server
->nfs_client
))
897 return -EPROTONOSUPPORT
;
899 fattr
= nfs_alloc_fattr();
903 /* We must ensure the session is initialised first */
904 error
= nfs4_init_session(server
->nfs_client
);
908 /* Set the basic capabilities */
909 server
->caps
|= server
->nfs_client
->cl_mvops
->init_caps
;
910 if (server
->flags
& NFS_MOUNT_NORDIRPLUS
)
911 server
->caps
&= ~NFS_CAP_READDIRPLUS
;
913 * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
916 if (nfs4_disable_idmapping
&&
917 server
->client
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
918 server
->caps
|= NFS_CAP_UIDGID_NOMAP
;
921 /* Probe the root fh to retrieve its FSID and filehandle */
922 error
= nfs4_get_rootfh(server
, mntfh
, auth_probe
);
926 dprintk("Server FSID: %llx:%llx\n",
927 (unsigned long long) server
->fsid
.major
,
928 (unsigned long long) server
->fsid
.minor
);
929 nfs_display_fhandle(mntfh
, "Pseudo-fs root FH");
931 nfs4_session_set_rwsize(server
);
933 error
= nfs_probe_fsinfo(server
, mntfh
, fattr
);
937 if (server
->namelen
== 0 || server
->namelen
> NFS4_MAXNAMLEN
)
938 server
->namelen
= NFS4_MAXNAMLEN
;
940 nfs_server_insert_lists(server
);
941 server
->mount_time
= jiffies
;
942 server
->destroy
= nfs4_destroy_server
;
944 nfs_free_fattr(fattr
);
949 * Create a version 4 volume record
951 static int nfs4_init_server(struct nfs_server
*server
,
952 struct nfs_parsed_mount_data
*data
)
954 struct rpc_timeout timeparms
;
957 dprintk("--> nfs4_init_server()\n");
959 nfs_init_timeout_values(&timeparms
, data
->nfs_server
.protocol
,
960 data
->timeo
, data
->retrans
);
962 /* Initialise the client representation from the mount data */
963 server
->flags
= data
->flags
;
964 server
->options
= data
->options
;
965 server
->auth_info
= data
->auth_info
;
967 /* Use the first specified auth flavor. If this flavor isn't
968 * allowed by the server, use the SECINFO path to try the
969 * other specified flavors */
970 if (data
->auth_info
.flavor_len
>= 1)
971 data
->selected_flavor
= data
->auth_info
.flavors
[0];
973 data
->selected_flavor
= RPC_AUTH_UNIX
;
975 /* Get a client record */
976 error
= nfs4_set_client(server
,
977 data
->nfs_server
.hostname
,
978 (const struct sockaddr
*)&data
->nfs_server
.address
,
979 data
->nfs_server
.addrlen
,
980 data
->client_address
,
981 data
->selected_flavor
,
982 data
->nfs_server
.protocol
,
990 server
->rsize
= nfs_block_size(data
->rsize
, NULL
);
992 server
->wsize
= nfs_block_size(data
->wsize
, NULL
);
994 server
->acregmin
= data
->acregmin
* HZ
;
995 server
->acregmax
= data
->acregmax
* HZ
;
996 server
->acdirmin
= data
->acdirmin
* HZ
;
997 server
->acdirmax
= data
->acdirmax
* HZ
;
999 server
->port
= data
->nfs_server
.port
;
1001 error
= nfs_init_server_rpcclient(server
, &timeparms
,
1002 data
->selected_flavor
);
1006 dprintk("<-- nfs4_init_server() = %d\n", error
);
1011 * Create a version 4 volume record
1012 * - keyed on server and FSID
1014 /*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data,
1015 struct nfs_fh *mntfh)*/
1016 struct nfs_server
*nfs4_create_server(struct nfs_mount_info
*mount_info
,
1017 struct nfs_subversion
*nfs_mod
)
1019 struct nfs_server
*server
;
1023 dprintk("--> nfs4_create_server()\n");
1025 server
= nfs_alloc_server();
1027 return ERR_PTR(-ENOMEM
);
1029 auth_probe
= mount_info
->parsed
->auth_info
.flavor_len
< 1;
1031 /* set up the general RPC client */
1032 error
= nfs4_init_server(server
, mount_info
->parsed
);
1036 error
= nfs4_server_common_setup(server
, mount_info
->mntfh
, auth_probe
);
1040 dprintk("<-- nfs4_create_server() = %p\n", server
);
1044 nfs_free_server(server
);
1045 dprintk("<-- nfs4_create_server() = error %d\n", error
);
1046 return ERR_PTR(error
);
1050 * Create an NFS4 referral server record
1052 struct nfs_server
*nfs4_create_referral_server(struct nfs_clone_mount
*data
,
1053 struct nfs_fh
*mntfh
)
1055 struct nfs_client
*parent_client
;
1056 struct nfs_server
*server
, *parent_server
;
1060 dprintk("--> nfs4_create_referral_server()\n");
1062 server
= nfs_alloc_server();
1064 return ERR_PTR(-ENOMEM
);
1066 parent_server
= NFS_SB(data
->sb
);
1067 parent_client
= parent_server
->nfs_client
;
1069 /* Initialise the client representation from the parent server */
1070 nfs_server_copy_userdata(server
, parent_server
);
1072 /* Get a client representation.
1073 * Note: NFSv4 always uses TCP, */
1074 error
= nfs4_set_client(server
, data
->hostname
,
1077 parent_client
->cl_ipaddr
,
1079 rpc_protocol(parent_server
->client
),
1080 parent_server
->client
->cl_timeout
,
1081 parent_client
->cl_mvops
->minor_version
,
1082 parent_client
->cl_net
);
1086 error
= nfs_init_server_rpcclient(server
, parent_server
->client
->cl_timeout
, data
->authflavor
);
1090 auth_probe
= parent_server
->auth_info
.flavor_len
< 1;
1092 error
= nfs4_server_common_setup(server
, mntfh
, auth_probe
);
1096 dprintk("<-- nfs_create_referral_server() = %p\n", server
);
1100 nfs_free_server(server
);
1101 dprintk("<-- nfs4_create_referral_server() = error %d\n", error
);
1102 return ERR_PTR(error
);
1106 * Grab the destination's particulars, including lease expiry time.
1108 * Returns zero if probe succeeded and retrieved FSID matches the FSID
1111 static int nfs_probe_destination(struct nfs_server
*server
)
1113 struct inode
*inode
= server
->super
->s_root
->d_inode
;
1114 struct nfs_fattr
*fattr
;
1117 fattr
= nfs_alloc_fattr();
1121 /* Sanity: the probe won't work if the destination server
1122 * does not recognize the migrated FH. */
1123 error
= nfs_probe_fsinfo(server
, NFS_FH(inode
), fattr
);
1125 nfs_free_fattr(fattr
);
1130 * nfs4_update_server - Move an nfs_server to a different nfs_client
1132 * @server: represents FSID to be moved
1133 * @hostname: new end-point's hostname
1134 * @sap: new end-point's socket address
1135 * @salen: size of "sap"
1137 * The nfs_server must be quiescent before this function is invoked.
1138 * Either its session is drained (NFSv4.1+), or its transport is
1139 * plugged and drained (NFSv4.0).
1141 * Returns zero on success, or a negative errno value.
1143 int nfs4_update_server(struct nfs_server
*server
, const char *hostname
,
1144 struct sockaddr
*sap
, size_t salen
)
1146 struct nfs_client
*clp
= server
->nfs_client
;
1147 struct rpc_clnt
*clnt
= server
->client
;
1148 struct xprt_create xargs
= {
1149 .ident
= clp
->cl_proto
,
1153 .servername
= hostname
,
1155 char buf
[INET6_ADDRSTRLEN
+ 1];
1156 struct sockaddr_storage address
;
1157 struct sockaddr
*localaddr
= (struct sockaddr
*)&address
;
1160 dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__
,
1161 (unsigned long long)server
->fsid
.major
,
1162 (unsigned long long)server
->fsid
.minor
,
1165 error
= rpc_switch_client_transport(clnt
, &xargs
, clnt
->cl_timeout
);
1167 dprintk("<-- %s(): rpc_switch_client_transport returned %d\n",
1172 error
= rpc_localaddr(clnt
, localaddr
, sizeof(address
));
1174 dprintk("<-- %s(): rpc_localaddr returned %d\n",
1179 error
= -EAFNOSUPPORT
;
1180 if (rpc_ntop(localaddr
, buf
, sizeof(buf
)) == 0) {
1181 dprintk("<-- %s(): rpc_ntop returned %d\n",
1186 nfs_server_remove_lists(server
);
1187 error
= nfs4_set_client(server
, hostname
, sap
, salen
, buf
,
1188 clp
->cl_rpcclient
->cl_auth
->au_flavor
,
1189 clp
->cl_proto
, clnt
->cl_timeout
,
1190 clp
->cl_minorversion
, clp
->cl_net
);
1191 nfs_put_client(clp
);
1193 nfs_server_insert_lists(server
);
1194 dprintk("<-- %s(): nfs4_set_client returned %d\n",
1199 if (server
->nfs_client
->cl_hostname
== NULL
)
1200 server
->nfs_client
->cl_hostname
= kstrdup(hostname
, GFP_KERNEL
);
1201 nfs_server_insert_lists(server
);
1203 error
= nfs_probe_destination(server
);
1207 dprintk("<-- %s() succeeded\n", __func__
);