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>
55 stateid_opaque_t si_opaque;
57 #define si_boot si_opaque.so_boot
58 #define si_stateownerid si_opaque.so_stateownerid
59 #define si_fileid si_opaque.so_fileid
61 #define STATEID_FMT "(%08x/%08x/%08x/%08x)"
62 #define STATEID_VAL(s) \
64 (s)->si_stateownerid, \
68 struct nfsd4_callback {
70 struct nfs4_client *cb_clp;
71 struct list_head cb_per_client;
73 struct rpc_message cb_msg;
74 const struct rpc_call_ops *cb_ops;
75 struct work_struct cb_work;
80 #define NFS4_OPEN_STID 1
81 #define NFS4_LOCK_STID 2
82 #define NFS4_DELEG_STID 4
84 struct list_head sc_hash;
88 struct nfs4_delegation {
89 struct list_head dl_perfile;
90 struct list_head dl_perclnt;
91 struct list_head dl_recall_lru; /* delegation recalled */
92 atomic_t dl_count; /* ref count */
93 struct nfs4_client *dl_client;
94 struct nfs4_file *dl_file;
98 struct nfs4_stid dl_stid;
99 struct knfsd_fh dl_fh;
101 struct nfsd4_callback dl_recall;
104 /* client delegation callback info */
105 struct nfs4_cb_conn {
106 /* SETCLIENTID info */
107 struct sockaddr_storage cb_addr;
108 struct sockaddr_storage cb_saddr;
110 u32 cb_prog; /* used only in 4.0 case;
111 per-session otherwise */
112 u32 cb_ident; /* minorversion 0 only */
113 struct svc_xprt *cb_xprt; /* minorversion 1 only */
116 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
118 return container_of(s, struct nfs4_delegation, dl_stid);
121 /* Maximum number of slots per session. 160 is useful for long haul TCP */
122 #define NFSD_MAX_SLOTS_PER_SESSION 160
123 /* Maximum number of operations per session compound */
124 #define NFSD_MAX_OPS_PER_COMPOUND 16
125 /* Maximum session per slot cache size */
126 #define NFSD_SLOT_CACHE_SIZE 1024
127 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
128 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
129 #define NFSD_MAX_MEM_PER_SESSION \
130 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
142 struct nfsd4_channel_attrs {
153 struct nfsd4_create_session {
155 struct nfs4_sessionid sessionid;
158 struct nfsd4_channel_attrs fore_channel;
159 struct nfsd4_channel_attrs back_channel;
165 struct nfsd4_bind_conn_to_session {
166 struct nfs4_sessionid sessionid;
170 /* The single slot clientid cache structure */
171 struct nfsd4_clid_slot {
174 struct nfsd4_create_session sl_cr_ses;
178 struct list_head cn_persession;
179 struct svc_xprt *cn_xprt;
180 struct svc_xpt_user cn_xpt_user;
181 struct nfsd4_session *cn_session;
182 /* CDFC4_FORE, CDFC4_BACK: */
183 unsigned char cn_flags;
186 struct nfsd4_session {
188 struct list_head se_hash; /* hash by sessionid */
189 struct list_head se_perclnt;
191 struct nfs4_client *se_client;
192 struct nfs4_sessionid se_sessionid;
193 struct nfsd4_channel_attrs se_fchannel;
194 struct nfsd4_channel_attrs se_bchannel;
195 struct list_head se_conns;
198 struct nfsd4_slot *se_slots[]; /* forward channel slots */
202 nfsd4_put_session(struct nfsd4_session *ses)
204 extern void free_session(struct kref *kref);
205 kref_put(&ses->se_ref, free_session);
209 nfsd4_get_session(struct nfsd4_session *ses)
211 kref_get(&ses->se_ref);
214 /* formatted contents of nfs4_sessionid */
215 struct nfsd4_sessionid {
221 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
224 * struct nfs4_client - one per client. Clientids live here.
225 * o Each nfs4_client is hashed by clientid.
227 * o Each nfs4_clients is also hashed by name
228 * (the opaque quantity initially sent by the client to identify itself).
230 * o cl_perclient list is used to ensure no dangling stateowner references
231 * when we expire the nfs4_client
234 struct list_head cl_idhash; /* hash by cl_clientid.id */
235 struct list_head cl_strhash; /* hash by cl_name */
236 struct list_head cl_openowners;
237 struct list_head cl_delegations;
238 struct list_head cl_lru; /* tail queue */
239 struct xdr_netobj cl_name; /* id generated by client */
240 char cl_recdir[HEXDIR_LEN]; /* recovery dir */
241 nfs4_verifier cl_verifier; /* generated by client */
242 time_t cl_time; /* time of last lease renewal */
243 struct sockaddr_storage cl_addr; /* client ipaddress */
244 u32 cl_flavor; /* setclientid pseudoflavor */
245 char *cl_principal; /* setclientid principal name */
246 struct svc_cred cl_cred; /* setclientid principal */
247 clientid_t cl_clientid; /* generated by server */
248 nfs4_verifier cl_confirm; /* generated by server */
249 u32 cl_firststate; /* recovery dir creation */
252 /* for v4.0 and v4.1 callbacks: */
253 struct nfs4_cb_conn cl_cb_conn;
254 #define NFSD4_CLIENT_CB_UPDATE 1
255 #define NFSD4_CLIENT_KILL 2
256 unsigned long cl_cb_flags;
257 struct rpc_clnt *cl_cb_client;
259 #define NFSD4_CB_UP 0
260 #define NFSD4_CB_UNKNOWN 1
261 #define NFSD4_CB_DOWN 2
263 struct nfsd4_callback cl_cb_null;
264 struct nfsd4_session *cl_cb_session;
265 struct list_head cl_callbacks; /* list of in-progress callbacks */
267 /* for all client information that callback code might need: */
271 struct list_head cl_sessions;
272 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
273 u32 cl_exchange_flags;
274 /* number of rpc's in progress over an associated session: */
275 atomic_t cl_refcount;
277 /* for nfs41 callbacks */
278 /* We currently support a single back channel with a single slot */
279 unsigned long cl_cb_slot_busy;
280 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
281 /* wait here for slots */
285 mark_client_expired(struct nfs4_client *clp)
291 is_client_expired(struct nfs4_client *clp)
293 return clp->cl_time == 0;
296 /* struct nfs4_client_reset
297 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
298 * upon lease reset, or from upcall to state_daemon (to read in state
299 * from non-volitile storage) upon reboot.
301 struct nfs4_client_reclaim {
302 struct list_head cr_strhash; /* hash by cr_name */
303 char cr_recdir[HEXDIR_LEN]; /* recover dir */
307 update_stateid(stateid_t *stateid)
309 stateid->si_generation++;
310 /* Wraparound recommendation from 3530bis-13 9.1.3.2: */
311 if (stateid->si_generation == 0)
312 stateid->si_generation = 1;
315 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
316 * The OPEN response, typically the largest, requires
317 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
318 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
319 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
322 #define NFSD4_REPLAY_ISIZE 112
325 * Replay buffer, where the result of the last seqid-mutating operation
330 unsigned int rp_buflen;
332 struct knfsd_fh rp_openfh;
333 char rp_ibuf[NFSD4_REPLAY_ISIZE];
337 * nfs4_stateowner can either be an open_owner, or a lock_owner
339 * so_idhash: stateid_hashtbl[] for open owner, lockstateid_hashtbl[]
341 * so_strhash: ownerstr_hashtbl[] for open_owner, lock_ownerstr_hashtbl[]
343 * so_perclient: nfs4_client->cl_perclient entry - used when nfs4_client
345 * so_perfilestate: heads the list of nfs4_ol_stateid (either open or lock)
346 * and is used to ensure no dangling nfs4_ol_stateid references when we
347 * release a stateowner.
348 * so_perlockowner: (open) nfs4_ol_stateid->st_perlockowner entry - used when
349 * close is called to reap associated byte-range locks
350 * so_close_lru: (open) stateowner is placed on this list instead of being
351 * reaped (when so_perfilestate is empty) to hold the last close replay.
352 * reaped by laundramat thread after lease period.
355 struct nfs4_stateowner {
356 struct list_head so_idhash; /* hash by so_id */
357 struct list_head so_strhash; /* hash by op_name */
358 struct list_head so_stateids;
359 int so_is_open_owner; /* 1=openowner,0=lockowner */
361 struct nfs4_client * so_client;
362 /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
363 * sequence id expected from the client: */
365 struct xdr_netobj so_owner; /* open owner name */
366 struct nfs4_replay so_replay;
369 struct nfs4_openowner {
370 struct nfs4_stateowner oo_owner; /* must be first field */
371 struct list_head oo_perclient;
372 struct list_head oo_close_lru; /* tail queue */
373 time_t oo_time; /* time of placement on so_close_lru */
374 #define NFS4_OO_CONFIRMED 1
375 unsigned char oo_flags;
378 struct nfs4_lockowner {
379 struct nfs4_stateowner lo_owner; /* must be first element */
380 struct list_head lo_perstateid; /* for lockowners only */
381 struct list_head lo_list; /* for temporary uses */
384 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
386 return container_of(so, struct nfs4_openowner, oo_owner);
389 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
391 return container_of(so, struct nfs4_lockowner, lo_owner);
395 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
396 * o fi_perfile list is used to search for conflicting
397 * share_acces, share_deny on the file.
401 struct list_head fi_hash; /* hash by "struct inode *" */
402 struct list_head fi_stateids;
403 struct list_head fi_delegations;
404 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
405 struct file * fi_fds[3];
407 * Each open or lock stateid contributes 1 to either
408 * fi_access[O_RDONLY], fi_access[O_WRONLY], or both, depending
409 * on open or lock mode:
411 atomic_t fi_access[2];
412 struct file *fi_deleg_file;
413 struct file_lock *fi_lease;
414 atomic_t fi_delegees;
415 struct inode *fi_inode;
416 u32 fi_id; /* used with stateowner->so_id
417 * for stateid_hashtbl hash */
418 bool fi_had_conflict;
421 /* XXX: for first cut may fall back on returning file that doesn't work
423 static inline struct file *find_writeable_file(struct nfs4_file *f)
425 if (f->fi_fds[O_WRONLY])
426 return f->fi_fds[O_WRONLY];
427 return f->fi_fds[O_RDWR];
430 static inline struct file *find_readable_file(struct nfs4_file *f)
432 if (f->fi_fds[O_RDONLY])
433 return f->fi_fds[O_RDONLY];
434 return f->fi_fds[O_RDWR];
437 static inline struct file *find_any_file(struct nfs4_file *f)
439 if (f->fi_fds[O_RDWR])
440 return f->fi_fds[O_RDWR];
441 else if (f->fi_fds[O_WRONLY])
442 return f->fi_fds[O_WRONLY];
444 return f->fi_fds[O_RDONLY];
448 * nfs4_ol_stateid can either be an open stateid or (eventually) a lock stateid
450 * (open)nfs4_ol_stateid: one per (open)nfs4_stateowner, nfs4_file
452 * st_hash: stateid_hashtbl[] entry or lockstateid_hashtbl entry
453 * st_perfile: file_hashtbl[] entry.
454 * st_perfile_state: nfs4_stateowner->so_perfilestate
455 * st_perlockowner: (open stateid) list of lock nfs4_stateowners
456 * st_access_bmap: used only for open stateid
457 * st_deny_bmap: used only for open stateid
458 * st_openstp: open stateid lock stateid was derived from
460 * XXX: open stateids and lock stateids have diverged sufficiently that
461 * we should consider defining separate structs for the two cases.
464 /* "ol" stands for "Open or Lock". Better suggestions welcome. */
465 struct nfs4_ol_stateid {
466 struct nfs4_stid st_stid;
467 struct list_head st_perfile;
468 struct list_head st_perstateowner;
469 struct list_head st_lockowners;
470 struct nfs4_stateowner * st_stateowner;
471 struct nfs4_file * st_file;
472 unsigned long st_access_bmap;
473 unsigned long st_deny_bmap;
474 struct nfs4_ol_stateid * st_openstp;
477 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
479 return container_of(s, struct nfs4_ol_stateid, st_stid);
482 /* flags for preprocess_seqid_op() */
483 #define RD_STATE 0x00000010
484 #define WR_STATE 0x00000020
486 struct nfsd4_compound_state;
488 extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
489 stateid_t *stateid, int flags, struct file **filp);
490 extern void nfs4_lock_state(void);
491 extern void nfs4_unlock_state(void);
492 extern int nfs4_in_grace(void);
493 extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
494 extern void nfs4_free_openowner(struct nfs4_openowner *);
495 extern void nfs4_free_lockowner(struct nfs4_lockowner *);
496 extern int set_callback_cred(void);
497 extern void nfsd4_probe_callback(struct nfs4_client *clp);
498 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
499 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
500 extern void nfsd4_do_callback_rpc(struct work_struct *);
501 extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
502 extern int nfsd4_create_callback_queue(void);
503 extern void nfsd4_destroy_callback_queue(void);
504 extern void nfsd4_shutdown_callback(struct nfs4_client *);
505 extern void nfs4_put_delegation(struct nfs4_delegation *dp);
506 extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
507 extern void nfsd4_init_recdir(void);
508 extern int nfsd4_recdir_load(void);
509 extern void nfsd4_shutdown_recdir(void);
510 extern int nfs4_client_to_reclaim(const char *name);
511 extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
512 extern void nfsd4_recdir_purge_old(void);
513 extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
514 extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
515 extern void release_session_client(struct nfsd4_session *);
516 extern __be32 nfs4_validate_stateid(stateid_t *, bool);
518 #endif /* NFSD4_STATE_H */