2 * Copyright (c) 2009 Rick Macklem, University of Guelph
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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29 #ifndef _NFS_NFSRVSTATE_H_
30 #define _NFS_NFSRVSTATE_H_
33 * Definitions for NFS V4 server state handling.
37 * List heads for nfsclient, nfsstate and nfslockfile.
38 * (Some systems seem to like to dynamically size these things, but I
39 * don't see any point in doing so for these ones.)
41 LIST_HEAD(nfsclienthashhead, nfsclient);
42 LIST_HEAD(nfsstatehead, nfsstate);
43 LIST_HEAD(nfslockhead, nfslock);
44 LIST_HEAD(nfslockhashhead, nfslockfile);
45 LIST_HEAD(nfssessionhead, nfsdsession);
46 LIST_HEAD(nfssessionhashhead, nfsdsession);
49 * List head for nfsusrgrp.
51 LIST_HEAD(nfsuserhashhead, nfsusrgrp);
52 TAILQ_HEAD(nfsuserlruhead, nfsusrgrp);
54 #define NFSCLIENTHASH(id) \
55 (&nfsclienthash[(id).lval[1] % NFSCLIENTHASHSIZE])
56 #define NFSSTATEHASH(clp, id) \
57 (&((clp)->lc_stateid[(id).other[2] % NFSSTATEHASHSIZE]))
58 #define NFSUSERHASH(id) \
59 (&nfsuserhash[(id) % NFSUSERHASHSIZE])
60 #define NFSUSERNAMEHASH(p, l) \
61 (&nfsusernamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \
63 #define NFSGROUPHASH(id) \
64 (&nfsgrouphash[(id) % NFSGROUPHASHSIZE])
65 #define NFSGROUPNAMEHASH(p, l) \
66 (&nfsgroupnamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \
69 struct nfssessionhash {
71 struct nfssessionhashhead list;
73 #define NFSSESSIONHASH(f) \
74 (&nfssessionhash[nfsrv_hashsessionid(f) % NFSSESSIONHASHSIZE])
77 * Client server structure for V4. It is doubly linked into two lists.
78 * The first is a hash table based on the clientid and the second is a
79 * list of all clients maintained in LRU order.
80 * The actual size malloc'd is large enough to accomodate the id string.
83 LIST_ENTRY(nfsclient) lc_hash; /* Clientid hash list */
84 struct nfsstatehead lc_stateid[NFSSTATEHASHSIZE]; /* stateid hash */
85 struct nfsstatehead lc_open; /* Open owner list */
86 struct nfsstatehead lc_deleg; /* Delegations */
87 struct nfsstatehead lc_olddeleg; /* and old delegations */
88 struct nfssessionhead lc_session; /* List of NFSv4.1 sessions */
89 time_t lc_expiry; /* Expiry time (sec) */
90 time_t lc_delegtime; /* Old deleg expiry (sec) */
91 nfsquad_t lc_clientid; /* 64 bit clientid */
92 nfsquad_t lc_confirm; /* 64 bit confirm value */
93 u_int32_t lc_program; /* RPC Program # */
94 u_int32_t lc_callback; /* Callback id */
95 u_int32_t lc_stateindex; /* Current state index# */
96 u_int32_t lc_statemaxindex; /* Max state index# */
97 u_int32_t lc_cbref; /* Cnt of callbacks */
98 uid_t lc_uid; /* User credential */
100 u_int16_t lc_namelen;
102 struct nfssockreq lc_req; /* Callback info */
103 u_short lc_idlen; /* Length of id string */
104 u_int32_t lc_flags; /* LCL_ flag bits */
105 u_char lc_verf[NFSX_VERF]; /* client verifier */
106 u_char lc_id[1]; /* Malloc'd correct size */
109 #define CLOPS_CONFIRM 0x0001
110 #define CLOPS_RENEW 0x0002
111 #define CLOPS_RENEWOP 0x0004
114 * Structure for an NFSv4.1 session.
115 * Locking rules for this structure.
116 * To add/delete one of these structures from the lists, you must lock
117 * both: NFSLOCKSESSION(session hashhead) and NFSLOCKSTATE() in that order.
118 * To traverse the lists looking for one of these, you must hold one
119 * of these two locks.
120 * The exception is if the thread holds the exclusive root sleep lock.
121 * In this case, all other nfsd threads are blocked, so locking the
122 * mutexes isn't required.
123 * When manipulating sess_refcnt, NFSLOCKSTATE() must be locked.
124 * When manipulating the fields withinsess_cbsess except nfsess_xprt,
125 * sess_cbsess.nfsess_mtx must be locked.
126 * When manipulating sess_slots and sess_cbsess.nfsess_xprt,
127 * NFSLOCKSESSION(session hashhead) must be locked.
130 uint64_t sess_refcnt; /* Reference count. */
131 LIST_ENTRY(nfsdsession) sess_hash; /* Hash list of sessions. */
132 LIST_ENTRY(nfsdsession) sess_list; /* List of client sessions. */
133 struct nfsslot sess_slots[NFSV4_SLOTS];
134 struct nfsclient *sess_clp; /* Associated clientid. */
135 uint32_t sess_crflags;
136 uint32_t sess_cbprogram;
137 uint32_t sess_maxreq;
138 uint32_t sess_maxresp;
139 uint32_t sess_maxrespcached;
140 uint32_t sess_maxops;
141 uint32_t sess_maxslots;
142 uint32_t sess_cbmaxreq;
143 uint32_t sess_cbmaxresp;
144 uint32_t sess_cbmaxrespcached;
145 uint32_t sess_cbmaxops;
146 uint8_t sess_sessionid[NFSX_V4SESSIONID];
147 struct nfsclsession sess_cbsess; /* Callback session. */
151 * Nfs state structure. I couldn't resist overloading this one, since
152 * it makes cleanup, etc. simpler. These structures are used in four ways:
153 * - open_owner structures chained off of nfsclient
154 * - open file structures chained off an open_owner structure
155 * - lock_owner structures chained off an open file structure
156 * - delegated file structures chained off of nfsclient and nfslockfile
157 * - the ls_list field is used for the chain it is in
158 * - the ls_head structure is used to chain off the sibling structure
159 * (it is a union between an nfsstate and nfslock structure head)
160 * If it is a lockowner stateid, nfslock structures hang off it.
161 * For the open file and lockowner cases, it is in the hash table in
162 * nfsclient for stateid.
165 LIST_ENTRY(nfsstate) ls_hash; /* Hash list entry */
166 LIST_ENTRY(nfsstate) ls_list; /* List of opens/delegs */
167 LIST_ENTRY(nfsstate) ls_file; /* Opens/Delegs for a file */
169 struct nfsstatehead open; /* Opens list */
170 struct nfslockhead lock; /* Locks list */
172 nfsv4stateid_t ls_stateid; /* The state id */
173 u_int32_t ls_seq; /* seq id */
174 uid_t ls_uid; /* uid of locker */
175 u_int32_t ls_flags; /* Type of lock, etc. */
177 struct nfsstate *openowner; /* Open only */
178 u_int32_t opentolockseq; /* Lock call only */
179 u_int32_t noopens; /* Openowner only */
181 u_quad_t filerev; /* Delegations only */
187 struct nfslockfile *ls_lfp; /* Back pointer */
188 struct nfsrvcache *ls_op; /* Op cache reference */
189 struct nfsclient *ls_clp; /* Back pointer */
190 u_short ls_ownerlen; /* Length of ls_owner */
191 u_char ls_owner[1]; /* malloc'd the correct size */
193 #define ls_lock ls_head.lock
194 #define ls_open ls_head.open
195 #define ls_opentolockseq ls_un.opentolockseq
196 #define ls_openowner ls_un.openowner
197 #define ls_openstp ls_un.openowner
198 #define ls_noopens ls_un.noopens
199 #define ls_filerev ls_un.deleg.filerev
200 #define ls_delegtime ls_un.deleg.expiry
201 #define ls_delegtimelimit ls_un.deleg.limit
202 #define ls_compref ls_un.deleg.compref
205 * Nfs lock structure.
206 * This structure is chained off of the nfsstate (the lockowner) and
207 * nfslockfile (the file) structures, for the file and owner it
208 * refers to. It holds flags and a byte range.
209 * It also has back pointers to the associated lock_owner and lockfile.
212 LIST_ENTRY(nfslock) lo_lckowner;
213 LIST_ENTRY(nfslock) lo_lckfile;
214 struct nfsstate *lo_stp;
215 struct nfslockfile *lo_lfp;
222 * Structure used to return a conflicting lock. (Must be large
223 * enough for the largest lock owner we can have.)
225 struct nfslockconflict {
226 nfsquad_t cl_clientid;
231 u_char cl_owner[NFSV4_OPAQUELIMIT];
235 * This structure is used to keep track of local locks that might need
239 LIST_ENTRY(nfsrollback) rlck_list;
246 * This structure refers to a file for which lock(s) and/or open(s) exist.
247 * Searched via hash table on file handle or found via the back pointer from an
248 * open or lock owner.
251 LIST_HEAD(, nfsstate) lf_open; /* Open list */
252 LIST_HEAD(, nfsstate) lf_deleg; /* Delegation list */
253 LIST_HEAD(, nfslock) lf_lock; /* Lock list */
254 LIST_HEAD(, nfslock) lf_locallock; /* Local lock list */
255 LIST_HEAD(, nfsrollback) lf_rollback; /* Local lock rollback list */
256 LIST_ENTRY(nfslockfile) lf_hash; /* Hash list entry */
257 fhandle_t lf_fh; /* The file handle */
258 struct nfsv4lock lf_locallock_lck; /* serialize local locking */
259 int lf_usecount; /* Ref count for locking */
263 * This structure is malloc'd an chained off hash lists for user/group
267 TAILQ_ENTRY(nfsusrgrp) lug_lru; /* LRU list */
268 LIST_ENTRY(nfsusrgrp) lug_numhash; /* Hash by id# */
269 LIST_ENTRY(nfsusrgrp) lug_namehash; /* and by name */
270 time_t lug_expiry; /* Expiry time in sec */
272 uid_t un_uid; /* id# */
275 int lug_namelen; /* Name length */
276 u_char lug_name[1]; /* malloc'd correct length */
278 #define lug_uid lug_un.un_uid
279 #define lug_gid lug_un.un_gid
282 * These structures are used for the stable storage restart stuff.
285 * Record at beginning of file.
288 u_int32_t lease; /* Lease duration */
289 u_int32_t numboots; /* Number of boottimes */
292 #if defined(_KERNEL) || defined(KERNEL)
293 void nfsrv_cleanclient(struct nfsclient *, NFSPROC_T *);
294 void nfsrv_freedeleglist(struct nfsstatehead *);
297 #endif /* _NFS_NFSRVSTATE_H_ */