blob: 6bd2f3c21f2b7195b355be089084bc8222176a45 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (c) 2001 The Regents of the University of Michigan.
3 * All rights reserved.
4 *
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <andros@umich.edu>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
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.
20 *
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.
32 *
33 */
34
35#ifndef _NFSD4_STATE_H
36#define _NFSD4_STATE_H
37
J. Bruce Fields19cf5c02010-06-06 18:37:16 -040038#include <linux/sunrpc/svc_xprt.h>
Boaz Harrosh72579ac2009-12-03 20:28:59 +020039#include <linux/nfsd/nfsfh.h>
J. Bruce Fields1557aca2009-12-04 19:36:06 -050040#include "nfsfh.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042typedef struct {
43 u32 cl_boot;
44 u32 cl_id;
45} clientid_t;
46
47typedef struct {
48 u32 so_boot;
49 u32 so_stateownerid;
50 u32 so_fileid;
51} stateid_opaque_t;
52
53typedef struct {
54 u32 si_generation;
55 stateid_opaque_t si_opaque;
56} stateid_t;
57#define si_boot si_opaque.so_boot
58#define si_stateownerid si_opaque.so_stateownerid
59#define si_fileid si_opaque.so_fileid
60
Benny Halevy8c10cbd2009-10-19 12:04:53 +020061#define STATEID_FMT "(%08x/%08x/%08x/%08x)"
62#define STATEID_VAL(s) \
63 (s)->si_boot, \
64 (s)->si_stateownerid, \
65 (s)->si_fileid, \
66 (s)->si_generation
67
J. Bruce Fields227f98d2010-02-18 08:27:24 -080068struct nfsd4_callback {
J. Bruce Fieldsfb003922010-05-31 18:21:37 -040069 void *cb_op;
70 struct nfs4_client *cb_clp;
J. Bruce Fields5ce8ba22011-01-10 16:44:41 -050071 struct list_head cb_per_client;
J. Bruce Fieldsfb003922010-05-31 18:21:37 -040072 u32 cb_minorversion;
J. Bruce Fields58784532010-05-16 16:47:08 -040073 struct rpc_message cb_msg;
74 const struct rpc_call_ops *cb_ops;
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -050075 struct work_struct cb_work;
J. Bruce Fields5ce8ba22011-01-10 16:44:41 -050076 bool cb_done;
J. Bruce Fields227f98d2010-02-18 08:27:24 -080077};
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079struct nfs4_delegation {
NeilBrownea1da632005-06-23 22:04:17 -070080 struct list_head dl_perfile;
81 struct list_head dl_perclnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct list_head dl_recall_lru; /* delegation recalled */
83 atomic_t dl_count; /* ref count */
84 struct nfs4_client *dl_client;
85 struct nfs4_file *dl_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 u32 dl_type;
87 time_t dl_time;
J. Bruce Fieldsb53d40c2009-05-01 19:50:00 -040088/* For recall: */
J. Bruce Fieldsb53d40c2009-05-01 19:50:00 -040089 stateid_t dl_stateid;
90 struct knfsd_fh dl_fh;
J. Bruce Fields3aea09d2009-05-01 20:11:12 -040091 int dl_retries;
J. Bruce Fields227f98d2010-02-18 08:27:24 -080092 struct nfsd4_callback dl_recall;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
Linus Torvalds1da177e2005-04-16 15:20:36 -070095/* client delegation callback info */
J. Bruce Fieldsc237dc02009-04-29 19:09:19 -040096struct nfs4_cb_conn {
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 /* SETCLIENTID info */
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -040098 struct sockaddr_storage cb_addr;
Takuma Umeya6f3d7722010-12-15 14:09:01 +090099 struct sockaddr_storage cb_saddr;
Jeff Laytonaa9a4ec2009-08-14 12:57:57 -0400100 size_t cb_addrlen;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -0400101 u32 cb_prog; /* used only in 4.0 case;
102 per-session otherwise */
Andy Adamsonab52ae62009-06-16 04:20:53 +0300103 u32 cb_ident; /* minorversion 0 only */
J. Bruce Fields2bf23872010-03-08 12:37:27 -0500104 struct svc_xprt *cb_xprt; /* minorversion 1 only */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106
Andy Adamsona6496372009-08-28 08:45:01 -0400107/* Maximum number of slots per session. 160 is useful for long haul TCP */
108#define NFSD_MAX_SLOTS_PER_SESSION 160
Andy Adamsonec6b5d72009-04-03 08:28:28 +0300109/* Maximum number of operations per session compound */
110#define NFSD_MAX_OPS_PER_COMPOUND 16
Andy Adamson557ce262009-08-28 08:45:04 -0400111/* Maximum session per slot cache size */
112#define NFSD_SLOT_CACHE_SIZE 1024
Andy Adamsona6496372009-08-28 08:45:01 -0400113/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
114#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
115#define NFSD_MAX_MEM_PER_SESSION \
116 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
Andy Adamson074fe892009-04-03 08:28:15 +0300117
Andy Adamson7116ed62009-04-03 08:27:43 +0300118struct nfsd4_slot {
Andy Adamson557ce262009-08-28 08:45:04 -0400119 bool sl_inuse;
120 bool sl_cachethis;
121 u16 sl_opcnt;
122 u32 sl_seqid;
123 __be32 sl_status;
124 u32 sl_datalen;
125 char sl_data[];
Andy Adamson7116ed62009-04-03 08:27:43 +0300126};
127
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +0300128struct nfsd4_channel_attrs {
129 u32 headerpadsz;
130 u32 maxreq_sz;
131 u32 maxresp_sz;
132 u32 maxresp_cached;
133 u32 maxops;
134 u32 maxreqs;
135 u32 nr_rdma_attrs;
136 u32 rdma_attrs;
137};
138
Andy Adamson49557cc2009-07-23 19:02:16 -0400139struct nfsd4_create_session {
140 clientid_t clientid;
141 struct nfs4_sessionid sessionid;
142 u32 seqid;
143 u32 flags;
144 struct nfsd4_channel_attrs fore_channel;
145 struct nfsd4_channel_attrs back_channel;
146 u32 callback_prog;
147 u32 uid;
148 u32 gid;
149};
150
J. Bruce Fields1d1bc8f2010-10-04 23:12:59 -0400151struct nfsd4_bind_conn_to_session {
152 struct nfs4_sessionid sessionid;
153 u32 dir;
154};
155
Andy Adamson49557cc2009-07-23 19:02:16 -0400156/* The single slot clientid cache structure */
157struct nfsd4_clid_slot {
158 u32 sl_seqid;
159 __be32 sl_status;
160 struct nfsd4_create_session sl_cr_ses;
161};
162
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400163struct nfsd4_conn {
164 struct list_head cn_persession;
165 struct svc_xprt *cn_xprt;
J. Bruce Fields19cf5c02010-06-06 18:37:16 -0400166 struct svc_xpt_user cn_xpt_user;
167 struct nfsd4_session *cn_session;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400168/* CDFC4_FORE, CDFC4_BACK: */
169 unsigned char cn_flags;
170};
171
Andy Adamson7116ed62009-04-03 08:27:43 +0300172struct nfsd4_session {
173 struct kref se_ref;
174 struct list_head se_hash; /* hash by sessionid */
175 struct list_head se_perclnt;
176 u32 se_flags;
Benny Halevy07cd4902010-05-12 00:13:41 +0300177 struct nfs4_client *se_client;
Andy Adamson7116ed62009-04-03 08:27:43 +0300178 struct nfs4_sessionid se_sessionid;
Alexandros Batsakis6c18ba92009-06-16 04:19:13 +0300179 struct nfsd4_channel_attrs se_fchannel;
180 struct nfsd4_channel_attrs se_bchannel;
J. Bruce Fieldsc7662512010-06-06 18:12:14 -0400181 struct list_head se_conns;
J. Bruce Fields8b5ce5c2010-10-19 17:31:50 -0400182 u32 se_cb_prog;
J. Bruce Fieldsac7c46f2010-06-14 19:01:57 -0400183 u32 se_cb_seq_nr;
Andy Adamson557ce262009-08-28 08:45:04 -0400184 struct nfsd4_slot *se_slots[]; /* forward channel slots */
Andy Adamson7116ed62009-04-03 08:27:43 +0300185};
186
187static inline void
188nfsd4_put_session(struct nfsd4_session *ses)
189{
190 extern void free_session(struct kref *kref);
191 kref_put(&ses->se_ref, free_session);
192}
193
194static inline void
195nfsd4_get_session(struct nfsd4_session *ses)
196{
197 kref_get(&ses->se_ref);
198}
199
Marc Eshel5282fd72009-04-03 08:27:52 +0300200/* formatted contents of nfs4_sessionid */
201struct nfsd4_sessionid {
202 clientid_t clientid;
203 u32 sequence;
204 u32 reserved;
205};
206
NeilBrowna55370a2005-06-23 22:03:52 -0700207#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209/*
210 * struct nfs4_client - one per client. Clientids live here.
211 * o Each nfs4_client is hashed by clientid.
212 *
213 * o Each nfs4_clients is also hashed by name
214 * (the opaque quantity initially sent by the client to identify itself).
215 *
216 * o cl_perclient list is used to ensure no dangling stateowner references
217 * when we expire the nfs4_client
218 */
219struct nfs4_client {
220 struct list_head cl_idhash; /* hash by cl_clientid.id */
221 struct list_head cl_strhash; /* hash by cl_name */
NeilBrownea1da632005-06-23 22:04:17 -0700222 struct list_head cl_openowners;
223 struct list_head cl_delegations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 struct list_head cl_lru; /* tail queue */
225 struct xdr_netobj cl_name; /* id generated by client */
NeilBrowna55370a2005-06-23 22:03:52 -0700226 char cl_recdir[HEXDIR_LEN]; /* recovery dir */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 nfs4_verifier cl_verifier; /* generated by client */
228 time_t cl_time; /* time of last lease renewal */
Jeff Layton363168b2009-08-14 12:57:56 -0400229 struct sockaddr_storage cl_addr; /* client ipaddress */
Olga Kornievskaia61054b12008-12-23 16:19:00 -0500230 u32 cl_flavor; /* setclientid pseudoflavor */
Olga Kornievskaia68e76ad2008-12-23 16:17:15 -0500231 char *cl_principal; /* setclientid principal name */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 struct svc_cred cl_cred; /* setclientid principal */
233 clientid_t cl_clientid; /* generated by server */
234 nfs4_verifier cl_confirm; /* generated by server */
NeilBrownc7b9a452005-06-23 22:04:30 -0700235 u32 cl_firststate; /* recovery dir creation */
J. Bruce Fields8323c3b2010-10-19 19:36:51 -0400236 u32 cl_minorversion;
Marc Eshel9fb87072009-04-03 08:27:46 +0300237
J. Bruce Fields2bf23872010-03-08 12:37:27 -0500238 /* for v4.0 and v4.1 callbacks: */
239 struct nfs4_cb_conn cl_cb_conn;
J. Bruce Fields6ff8da02010-06-04 20:04:45 -0400240#define NFSD4_CLIENT_CB_UPDATE 1
241#define NFSD4_CLIENT_KILL 2
242 unsigned long cl_cb_flags;
J. Bruce Fields2bf23872010-03-08 12:37:27 -0500243 struct rpc_clnt *cl_cb_client;
J. Bruce Fields6ff8da02010-06-04 20:04:45 -0400244 u32 cl_cb_ident;
J. Bruce Fields77a35692010-04-30 18:51:44 -0400245#define NFSD4_CB_UP 0
246#define NFSD4_CB_UNKNOWN 1
247#define NFSD4_CB_DOWN 2
248 int cl_cb_state;
J. Bruce Fieldscee277d2010-05-26 17:52:14 -0400249 struct nfsd4_callback cl_cb_null;
J. Bruce Fieldsedd76782010-06-14 22:26:31 -0400250 struct nfsd4_session *cl_cb_session;
J. Bruce Fields5ce8ba22011-01-10 16:44:41 -0500251 struct list_head cl_callbacks; /* list of in-progress callbacks */
J. Bruce Fields2bf23872010-03-08 12:37:27 -0500252
J. Bruce Fields6ff8da02010-06-04 20:04:45 -0400253 /* for all client information that callback code might need: */
254 spinlock_t cl_lock;
255
Marc Eshel9fb87072009-04-03 08:27:46 +0300256 /* for nfs41 */
257 struct list_head cl_sessions;
Andy Adamson49557cc2009-07-23 19:02:16 -0400258 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
Andy Adamson0733d212009-04-03 08:28:01 +0300259 u32 cl_exchange_flags;
Benny Halevy46583e22010-05-12 00:13:29 +0300260 /* number of rpc's in progress over an associated session: */
261 atomic_t cl_refcount;
Andy Adamson38524ab2009-09-10 12:25:59 +0300262
263 /* for nfs41 callbacks */
Ricardo Labiaga199ff352009-09-10 12:26:25 +0300264 /* We currently support a single back channel with a single slot */
265 unsigned long cl_cb_slot_busy;
Ricardo Labiaga199ff352009-09-10 12:26:25 +0300266 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
267 /* wait here for slots */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268};
269
Benny Halevy07cd4902010-05-12 00:13:41 +0300270static inline void
271mark_client_expired(struct nfs4_client *clp)
272{
273 clp->cl_time = 0;
274}
275
276static inline bool
277is_client_expired(struct nfs4_client *clp)
278{
279 return clp->cl_time == 0;
280}
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282/* struct nfs4_client_reset
283 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
284 * upon lease reset, or from upcall to state_daemon (to read in state
285 * from non-volitile storage) upon reboot.
286 */
287struct nfs4_client_reclaim {
288 struct list_head cr_strhash; /* hash by cr_name */
NeilBrowna55370a2005-06-23 22:03:52 -0700289 char cr_recdir[HEXDIR_LEN]; /* recover dir */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290};
291
292static inline void
293update_stateid(stateid_t *stateid)
294{
295 stateid->si_generation++;
296}
297
298/* A reasonable value for REPLAY_ISIZE was estimated as follows:
299 * The OPEN response, typically the largest, requires
300 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
301 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
302 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
303 */
304
305#define NFSD4_REPLAY_ISIZE 112
306
307/*
308 * Replay buffer, where the result of the last seqid-mutating operation
309 * is cached.
310 */
311struct nfs4_replay {
Al Virob37ad282006-10-19 23:28:59 -0700312 __be32 rp_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 unsigned int rp_buflen;
314 char *rp_buf;
315 unsigned intrp_allocated;
J. Bruce Fieldsa4773c02009-02-02 17:23:10 -0500316 struct knfsd_fh rp_openfh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 char rp_ibuf[NFSD4_REPLAY_ISIZE];
318};
319
320/*
321* nfs4_stateowner can either be an open_owner, or a lock_owner
322*
323* so_idhash: stateid_hashtbl[] for open owner, lockstateid_hashtbl[]
324* for lock_owner
325* so_strhash: ownerstr_hashtbl[] for open_owner, lock_ownerstr_hashtbl[]
326* for lock_owner
327* so_perclient: nfs4_client->cl_perclient entry - used when nfs4_client
328* struct is reaped.
329* so_perfilestate: heads the list of nfs4_stateid (either open or lock)
330* and is used to ensure no dangling nfs4_stateid references when we
331* release a stateowner.
332* so_perlockowner: (open) nfs4_stateid->st_perlockowner entry - used when
333* close is called to reap associated byte-range locks
334* so_close_lru: (open) stateowner is placed on this list instead of being
335* reaped (when so_perfilestate is empty) to hold the last close replay.
336* reaped by laundramat thread after lease period.
337*/
338struct nfs4_stateowner {
339 struct kref so_ref;
340 struct list_head so_idhash; /* hash by so_id */
341 struct list_head so_strhash; /* hash by op_name */
NeilBrownea1da632005-06-23 22:04:17 -0700342 struct list_head so_perclient;
343 struct list_head so_stateids;
344 struct list_head so_perstateid; /* for lockowners only */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 struct list_head so_close_lru; /* tail queue */
346 time_t so_time; /* time of placement on so_close_lru */
347 int so_is_open_owner; /* 1=openowner,0=lockowner */
348 u32 so_id;
349 struct nfs4_client * so_client;
NeilBrown7fb64ce2005-07-07 17:59:20 -0700350 /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
351 * sequence id expected from the client: */
352 u32 so_seqid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 struct xdr_netobj so_owner; /* open owner name */
354 int so_confirmed; /* successful OPEN_CONFIRM? */
355 struct nfs4_replay so_replay;
356};
357
358/*
359* nfs4_file: a file opened by some number of (open) nfs4_stateowners.
360* o fi_perfile list is used to search for conflicting
361* share_acces, share_deny on the file.
362*/
363struct nfs4_file {
J. Bruce Fields8b671b82009-02-22 14:51:34 -0800364 atomic_t fi_ref;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 struct list_head fi_hash; /* hash by "struct inode *" */
NeilBrown8beefa22005-06-23 22:03:08 -0700366 struct list_head fi_stateids;
367 struct list_head fi_delegations;
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400368 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
369 struct file * fi_fds[3];
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400370 /*
J. Bruce Fields9ae78bc2011-03-17 12:52:33 -0400371 * Each open or lock stateid contributes 1 to either
372 * fi_access[O_RDONLY], fi_access[O_WRONLY], or both, depending
373 * on open or lock mode:
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400374 */
J. Bruce Fields9ae78bc2011-03-17 12:52:33 -0400375 atomic_t fi_access[2];
J. Bruce Fieldsacfdf5c2011-01-31 19:20:39 -0500376 struct file *fi_deleg_file;
377 struct file_lock *fi_lease;
378 atomic_t fi_delegees;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 struct inode *fi_inode;
380 u32 fi_id; /* used with stateowner->so_id
381 * for stateid_hashtbl hash */
Meelap Shah47f99402007-07-17 04:04:40 -0700382 bool fi_had_conflict;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383};
384
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400385/* XXX: for first cut may fall back on returning file that doesn't work
386 * at all? */
387static inline struct file *find_writeable_file(struct nfs4_file *f)
388{
J. Bruce Fields7d947842010-08-20 18:09:31 -0400389 if (f->fi_fds[O_WRONLY])
390 return f->fi_fds[O_WRONLY];
391 return f->fi_fds[O_RDWR];
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400392}
393
394static inline struct file *find_readable_file(struct nfs4_file *f)
395{
J. Bruce Fields7d947842010-08-20 18:09:31 -0400396 if (f->fi_fds[O_RDONLY])
397 return f->fi_fds[O_RDONLY];
398 return f->fi_fds[O_RDWR];
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400399}
400
401static inline struct file *find_any_file(struct nfs4_file *f)
402{
403 if (f->fi_fds[O_RDWR])
404 return f->fi_fds[O_RDWR];
J. Bruce Fields18608ad2010-08-20 18:06:26 -0400405 else if (f->fi_fds[O_WRONLY])
J. Bruce Fieldsf9d75622010-07-08 11:02:09 -0400406 return f->fi_fds[O_WRONLY];
407 else
408 return f->fi_fds[O_RDONLY];
409}
410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411/*
412* nfs4_stateid can either be an open stateid or (eventually) a lock stateid
413*
414* (open)nfs4_stateid: one per (open)nfs4_stateowner, nfs4_file
415*
416* st_hash: stateid_hashtbl[] entry or lockstateid_hashtbl entry
417* st_perfile: file_hashtbl[] entry.
418* st_perfile_state: nfs4_stateowner->so_perfilestate
419* st_perlockowner: (open stateid) list of lock nfs4_stateowners
420* st_access_bmap: used only for open stateid
421* st_deny_bmap: used only for open stateid
NeilBrown4c4cd222005-07-07 17:59:27 -0700422* st_openstp: open stateid lock stateid was derived from
423*
424* XXX: open stateids and lock stateids have diverged sufficiently that
425* we should consider defining separate structs for the two cases.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426*/
427
428struct nfs4_stateid {
429 struct list_head st_hash;
430 struct list_head st_perfile;
NeilBrownea1da632005-06-23 22:04:17 -0700431 struct list_head st_perstateowner;
432 struct list_head st_lockowners;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 struct nfs4_stateowner * st_stateowner;
434 struct nfs4_file * st_file;
435 stateid_t st_stateid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 unsigned long st_access_bmap;
437 unsigned long st_deny_bmap;
NeilBrown4c4cd222005-07-07 17:59:27 -0700438 struct nfs4_stateid * st_openstp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439};
440
441/* flags for preprocess_seqid_op() */
Andy Adamson66689582009-04-03 08:28:45 +0300442#define HAS_SESSION 0x00000001
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443#define CONFIRM 0x00000002
444#define OPEN_STATE 0x00000004
445#define LOCK_STATE 0x00000008
446#define RD_STATE 0x00000010
447#define WR_STATE 0x00000020
448#define CLOSE_STATE 0x00000040
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450#define seqid_mutating_err(err) \
451 (((err) != nfserr_stale_clientid) && \
452 ((err) != nfserr_bad_seqid) && \
453 ((err) != nfserr_stale_stateid) && \
454 ((err) != nfserr_bad_stateid))
455
Benny Halevydd453df2009-04-03 08:28:41 +0300456struct nfsd4_compound_state;
457
458extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 stateid_t *stateid, int flags, struct file **filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460extern void nfs4_lock_state(void);
461extern void nfs4_unlock_state(void);
462extern int nfs4_in_grace(void);
Al Virob37ad282006-10-19 23:28:59 -0700463extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464extern void nfs4_free_stateowner(struct kref *kref);
J. Bruce Fields80fc0152009-09-15 18:07:35 -0400465extern int set_callback_cred(void);
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -0400466extern void nfsd4_probe_callback(struct nfs4_client *clp);
J. Bruce Fields84f5f7c2010-12-09 15:52:19 -0500467extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
J. Bruce Fields5a3c9d72010-10-19 17:56:52 -0400468extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -0500469extern void nfsd4_do_callback_rpc(struct work_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
J. Bruce Fieldsb5a1a812010-03-03 14:52:55 -0500471extern int nfsd4_create_callback_queue(void);
472extern void nfsd4_destroy_callback_queue(void);
J. Bruce Fields6ff8da02010-06-04 20:04:45 -0400473extern void nfsd4_shutdown_callback(struct nfs4_client *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474extern void nfs4_put_delegation(struct nfs4_delegation *dp);
Al Virob37ad282006-10-19 23:28:59 -0700475extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
NeilBrown190e4fb2005-06-23 22:04:25 -0700476extern void nfsd4_init_recdir(char *recdir_name);
477extern int nfsd4_recdir_load(void);
478extern void nfsd4_shutdown_recdir(void);
479extern int nfs4_client_to_reclaim(const char *name);
Andy Adamsona1bcecd2009-04-03 08:28:05 +0300480extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
NeilBrownc7b9a452005-06-23 22:04:30 -0700481extern void nfsd4_recdir_purge_old(void);
482extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
483extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
Benny Halevyd7682982010-05-12 00:13:54 +0300484extern void release_session_client(struct nfsd4_session *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
486static inline void
487nfs4_put_stateowner(struct nfs4_stateowner *so)
488{
489 kref_put(&so->so_ref, nfs4_free_stateowner);
490}
491
492static inline void
493nfs4_get_stateowner(struct nfs4_stateowner *so)
494{
495 kref_get(&so->so_ref);
496}
497
498#endif /* NFSD4_STATE_H */