2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <andros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #ifndef _NFSD4_STATE_H
36 #define _NFSD4_STATE_H
38 #include <linux/sunrpc/svc_xprt.h>
39 #include <linux/nfsd/nfsfh.h>
54 stateid_opaque_t si_opaque
;
57 #define STATEID_FMT "(%08x/%08x/%08x/%08x)"
58 #define STATEID_VAL(s) \
59 (s)->si_opaque.so_clid.cl_boot, \
60 (s)->si_opaque.so_clid.cl_id, \
61 (s)->si_opaque.so_id, \
64 struct nfsd4_callback
{
66 struct nfs4_client
*cb_clp
;
67 struct list_head cb_per_client
;
69 struct rpc_message cb_msg
;
70 const struct rpc_call_ops
*cb_ops
;
71 struct work_struct cb_work
;
76 #define NFS4_OPEN_STID 1
77 #define NFS4_LOCK_STID 2
78 #define NFS4_DELEG_STID 4
79 /* For an open stateid kept around *only* to process close replays: */
80 #define NFS4_CLOSED_STID 8
81 unsigned char sc_type
;
82 struct list_head sc_hash
;
84 struct nfs4_client
*sc_client
;
87 struct nfs4_delegation
{
88 struct list_head dl_perfile
;
89 struct list_head dl_perclnt
;
90 struct list_head dl_recall_lru
; /* delegation recalled */
91 atomic_t dl_count
; /* ref count */
92 struct nfs4_file
*dl_file
;
96 struct nfs4_stid dl_stid
;
97 struct knfsd_fh dl_fh
;
99 struct nfsd4_callback dl_recall
;
102 /* client delegation callback info */
103 struct nfs4_cb_conn
{
104 /* SETCLIENTID info */
105 struct sockaddr_storage cb_addr
;
106 struct sockaddr_storage cb_saddr
;
108 u32 cb_prog
; /* used only in 4.0 case;
109 per-session otherwise */
110 u32 cb_ident
; /* minorversion 0 only */
111 struct svc_xprt
*cb_xprt
; /* minorversion 1 only */
114 static inline struct nfs4_delegation
*delegstateid(struct nfs4_stid
*s
)
116 return container_of(s
, struct nfs4_delegation
, dl_stid
);
119 /* Maximum number of slots per session. 160 is useful for long haul TCP */
120 #define NFSD_MAX_SLOTS_PER_SESSION 160
121 /* Maximum number of operations per session compound */
122 #define NFSD_MAX_OPS_PER_COMPOUND 16
123 /* Maximum session per slot cache size */
124 #define NFSD_SLOT_CACHE_SIZE 1024
125 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
126 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
127 #define NFSD_MAX_MEM_PER_SESSION \
128 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
140 struct nfsd4_channel_attrs
{
151 struct nfsd4_create_session
{
153 struct nfs4_sessionid sessionid
;
156 struct nfsd4_channel_attrs fore_channel
;
157 struct nfsd4_channel_attrs back_channel
;
163 struct nfsd4_bind_conn_to_session
{
164 struct nfs4_sessionid sessionid
;
168 /* The single slot clientid cache structure */
169 struct nfsd4_clid_slot
{
172 struct nfsd4_create_session sl_cr_ses
;
176 struct list_head cn_persession
;
177 struct svc_xprt
*cn_xprt
;
178 struct svc_xpt_user cn_xpt_user
;
179 struct nfsd4_session
*cn_session
;
180 /* CDFC4_FORE, CDFC4_BACK: */
181 unsigned char cn_flags
;
184 struct nfsd4_session
{
186 struct list_head se_hash
; /* hash by sessionid */
187 struct list_head se_perclnt
;
189 struct nfs4_client
*se_client
;
190 struct nfs4_sessionid se_sessionid
;
191 struct nfsd4_channel_attrs se_fchannel
;
192 struct nfsd4_channel_attrs se_bchannel
;
193 struct list_head se_conns
;
196 struct nfsd4_slot
*se_slots
[]; /* forward channel slots */
200 nfsd4_put_session(struct nfsd4_session
*ses
)
202 extern void free_session(struct kref
*kref
);
203 kref_put(&ses
->se_ref
, free_session
);
207 nfsd4_get_session(struct nfsd4_session
*ses
)
209 kref_get(&ses
->se_ref
);
212 /* formatted contents of nfs4_sessionid */
213 struct nfsd4_sessionid
{
219 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
222 * struct nfs4_client - one per client. Clientids live here.
223 * o Each nfs4_client is hashed by clientid.
225 * o Each nfs4_clients is also hashed by name
226 * (the opaque quantity initially sent by the client to identify itself).
228 * o cl_perclient list is used to ensure no dangling stateowner references
229 * when we expire the nfs4_client
232 struct list_head cl_idhash
; /* hash by cl_clientid.id */
233 struct list_head cl_strhash
; /* hash by cl_name */
234 struct list_head cl_openowners
;
235 struct list_head cl_delegations
;
236 struct list_head cl_lru
; /* tail queue */
237 struct xdr_netobj cl_name
; /* id generated by client */
238 char cl_recdir
[HEXDIR_LEN
]; /* recovery dir */
239 nfs4_verifier cl_verifier
; /* generated by client */
240 time_t cl_time
; /* time of last lease renewal */
241 struct sockaddr_storage cl_addr
; /* client ipaddress */
242 u32 cl_flavor
; /* setclientid pseudoflavor */
243 char *cl_principal
; /* setclientid principal name */
244 struct svc_cred cl_cred
; /* setclientid principal */
245 clientid_t cl_clientid
; /* generated by server */
246 nfs4_verifier cl_confirm
; /* generated by server */
247 u32 cl_firststate
; /* recovery dir creation */
250 /* for v4.0 and v4.1 callbacks: */
251 struct nfs4_cb_conn cl_cb_conn
;
252 #define NFSD4_CLIENT_CB_UPDATE 1
253 #define NFSD4_CLIENT_KILL 2
254 unsigned long cl_cb_flags
;
255 struct rpc_clnt
*cl_cb_client
;
257 #define NFSD4_CB_UP 0
258 #define NFSD4_CB_UNKNOWN 1
259 #define NFSD4_CB_DOWN 2
261 struct nfsd4_callback cl_cb_null
;
262 struct nfsd4_session
*cl_cb_session
;
263 struct list_head cl_callbacks
; /* list of in-progress callbacks */
265 /* for all client information that callback code might need: */
269 struct list_head cl_sessions
;
270 struct nfsd4_clid_slot cl_cs_slot
; /* create_session slot */
271 u32 cl_exchange_flags
;
272 /* number of rpc's in progress over an associated session: */
273 atomic_t cl_refcount
;
275 /* for nfs41 callbacks */
276 /* We currently support a single back channel with a single slot */
277 unsigned long cl_cb_slot_busy
;
278 struct rpc_wait_queue cl_cb_waitq
; /* backchannel callers may */
279 /* wait here for slots */
283 mark_client_expired(struct nfs4_client
*clp
)
289 is_client_expired(struct nfs4_client
*clp
)
291 return clp
->cl_time
== 0;
294 /* struct nfs4_client_reset
295 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
296 * upon lease reset, or from upcall to state_daemon (to read in state
297 * from non-volitile storage) upon reboot.
299 struct nfs4_client_reclaim
{
300 struct list_head cr_strhash
; /* hash by cr_name */
301 char cr_recdir
[HEXDIR_LEN
]; /* recover dir */
305 update_stateid(stateid_t
*stateid
)
307 stateid
->si_generation
++;
308 /* Wraparound recommendation from 3530bis-13 9.1.3.2: */
309 if (stateid
->si_generation
== 0)
310 stateid
->si_generation
= 1;
313 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
314 * The OPEN response, typically the largest, requires
315 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
316 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
317 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
320 #define NFSD4_REPLAY_ISIZE 112
323 * Replay buffer, where the result of the last seqid-mutating operation
328 unsigned int rp_buflen
;
330 struct knfsd_fh rp_openfh
;
331 char rp_ibuf
[NFSD4_REPLAY_ISIZE
];
335 * nfs4_stateowner can either be an open_owner, or a lock_owner
337 * so_idhash: stateid_hashtbl[] for open owner, lockstateid_hashtbl[]
339 * so_strhash: ownerstr_hashtbl[] for open_owner, lock_ownerstr_hashtbl[]
341 * so_perclient: nfs4_client->cl_perclient entry - used when nfs4_client
343 * so_perfilestate: heads the list of nfs4_ol_stateid (either open or lock)
344 * and is used to ensure no dangling nfs4_ol_stateid references when we
345 * release a stateowner.
346 * so_perlockowner: (open) nfs4_ol_stateid->st_perlockowner entry - used when
347 * close is called to reap associated byte-range locks
348 * so_close_lru: (open) stateowner is placed on this list instead of being
349 * reaped (when so_perfilestate is empty) to hold the last close replay.
350 * reaped by laundramat thread after lease period.
353 struct nfs4_stateowner
{
354 struct list_head so_strhash
; /* hash by op_name */
355 struct list_head so_stateids
;
356 int so_is_open_owner
; /* 1=openowner,0=lockowner */
357 struct nfs4_client
* so_client
;
358 /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
359 * sequence id expected from the client: */
361 struct xdr_netobj so_owner
; /* open owner name */
362 struct nfs4_replay so_replay
;
365 struct nfs4_openowner
{
366 struct nfs4_stateowner oo_owner
; /* must be first field */
367 struct list_head oo_perclient
;
368 struct list_head oo_close_lru
; /* tail queue */
369 struct nfs4_ol_stateid
*oo_last_closed_stid
;
370 time_t oo_time
; /* time of placement on so_close_lru */
371 #define NFS4_OO_CONFIRMED 1
372 #define NFS4_OO_PURGE_CLOSE 2
373 unsigned char oo_flags
;
376 struct nfs4_lockowner
{
377 struct nfs4_stateowner lo_owner
; /* must be first element */
378 struct list_head lo_perstateid
; /* for lockowners only */
379 struct list_head lo_list
; /* for temporary uses */
382 static inline struct nfs4_openowner
* openowner(struct nfs4_stateowner
*so
)
384 return container_of(so
, struct nfs4_openowner
, oo_owner
);
387 static inline struct nfs4_lockowner
* lockowner(struct nfs4_stateowner
*so
)
389 return container_of(so
, struct nfs4_lockowner
, lo_owner
);
393 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
394 * o fi_perfile list is used to search for conflicting
395 * share_acces, share_deny on the file.
399 struct list_head fi_hash
; /* hash by "struct inode *" */
400 struct list_head fi_stateids
;
401 struct list_head fi_delegations
;
402 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
403 struct file
* fi_fds
[3];
405 * Each open or lock stateid contributes 1 to either
406 * fi_access[O_RDONLY], fi_access[O_WRONLY], or both, depending
407 * on open or lock mode:
409 atomic_t fi_access
[2];
410 struct file
*fi_deleg_file
;
411 struct file_lock
*fi_lease
;
412 atomic_t fi_delegees
;
413 struct inode
*fi_inode
;
414 bool fi_had_conflict
;
417 /* XXX: for first cut may fall back on returning file that doesn't work
419 static inline struct file
*find_writeable_file(struct nfs4_file
*f
)
421 if (f
->fi_fds
[O_WRONLY
])
422 return f
->fi_fds
[O_WRONLY
];
423 return f
->fi_fds
[O_RDWR
];
426 static inline struct file
*find_readable_file(struct nfs4_file
*f
)
428 if (f
->fi_fds
[O_RDONLY
])
429 return f
->fi_fds
[O_RDONLY
];
430 return f
->fi_fds
[O_RDWR
];
433 static inline struct file
*find_any_file(struct nfs4_file
*f
)
435 if (f
->fi_fds
[O_RDWR
])
436 return f
->fi_fds
[O_RDWR
];
437 else if (f
->fi_fds
[O_WRONLY
])
438 return f
->fi_fds
[O_WRONLY
];
440 return f
->fi_fds
[O_RDONLY
];
444 * nfs4_ol_stateid can either be an open stateid or (eventually) a lock stateid
446 * (open)nfs4_ol_stateid: one per (open)nfs4_stateowner, nfs4_file
448 * st_hash: stateid_hashtbl[] entry or lockstateid_hashtbl entry
449 * st_perfile: file_hashtbl[] entry.
450 * st_perfile_state: nfs4_stateowner->so_perfilestate
451 * st_perlockowner: (open stateid) list of lock nfs4_stateowners
452 * st_access_bmap: used only for open stateid
453 * st_deny_bmap: used only for open stateid
454 * st_openstp: open stateid lock stateid was derived from
456 * XXX: open stateids and lock stateids have diverged sufficiently that
457 * we should consider defining separate structs for the two cases.
460 /* "ol" stands for "Open or Lock". Better suggestions welcome. */
461 struct nfs4_ol_stateid
{
462 struct nfs4_stid st_stid
;
463 struct list_head st_perfile
;
464 struct list_head st_perstateowner
;
465 struct list_head st_lockowners
;
466 struct nfs4_stateowner
* st_stateowner
;
467 struct nfs4_file
* st_file
;
468 unsigned long st_access_bmap
;
469 unsigned long st_deny_bmap
;
470 struct nfs4_ol_stateid
* st_openstp
;
473 static inline struct nfs4_ol_stateid
*openlockstateid(struct nfs4_stid
*s
)
475 return container_of(s
, struct nfs4_ol_stateid
, st_stid
);
478 /* flags for preprocess_seqid_op() */
479 #define RD_STATE 0x00000010
480 #define WR_STATE 0x00000020
482 struct nfsd4_compound_state
;
484 extern __be32
nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
485 stateid_t
*stateid
, int flags
, struct file
**filp
);
486 extern void nfs4_lock_state(void);
487 extern void nfs4_unlock_state(void);
488 extern int nfs4_in_grace(void);
489 extern __be32
nfs4_check_open_reclaim(clientid_t
*clid
);
490 extern void nfs4_free_openowner(struct nfs4_openowner
*);
491 extern void nfs4_free_lockowner(struct nfs4_lockowner
*);
492 extern int set_callback_cred(void);
493 extern void nfsd4_probe_callback(struct nfs4_client
*clp
);
494 extern void nfsd4_probe_callback_sync(struct nfs4_client
*clp
);
495 extern void nfsd4_change_callback(struct nfs4_client
*clp
, struct nfs4_cb_conn
*);
496 extern void nfsd4_do_callback_rpc(struct work_struct
*);
497 extern void nfsd4_cb_recall(struct nfs4_delegation
*dp
);
498 extern int nfsd4_create_callback_queue(void);
499 extern void nfsd4_destroy_callback_queue(void);
500 extern void nfsd4_shutdown_callback(struct nfs4_client
*);
501 extern void nfs4_put_delegation(struct nfs4_delegation
*dp
);
502 extern __be32
nfs4_make_rec_clidname(char *clidname
, struct xdr_netobj
*clname
);
503 extern void nfsd4_init_recdir(void);
504 extern int nfsd4_recdir_load(void);
505 extern void nfsd4_shutdown_recdir(void);
506 extern int nfs4_client_to_reclaim(const char *name
);
507 extern int nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
);
508 extern void nfsd4_recdir_purge_old(void);
509 extern int nfsd4_create_clid_dir(struct nfs4_client
*clp
);
510 extern void nfsd4_remove_clid_dir(struct nfs4_client
*clp
);
511 extern void release_session_client(struct nfsd4_session
*);
512 extern __be32
nfs4_validate_stateid(stateid_t
*, bool);
513 extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*);
515 #endif /* NFSD4_STATE_H */