2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #ifndef __CM_SCACHE_H_ENV__
11 #define __CM_SCACHE_H_ENV__ 1
13 typedef struct cm_fid {
20 typedef struct cm_accessCache {
21 osi_queue_t q; /* queue header */
22 struct cm_user *userp; /* user having access rights */
23 long rights; /* rights */
26 typedef struct cm_file_lock {
27 osi_queue_t q; /* list of all locks */
28 osi_queue_t fileq; /* per-file list of locks */
30 LARGE_INTEGER LOffset;
31 LARGE_INTEGER LLength;
33 unsigned char LockType;
37 #define CM_FILELOCK_FLAG_INVALID 0x1
38 #define CM_FILELOCK_FLAG_WAITING 0x2
40 typedef struct cm_prefetch { /* last region scanned for prefetching */
41 osi_hyper_t base; /* start of region */
42 osi_hyper_t end; /* first char past region */
45 typedef struct cm_scache {
46 osi_queue_t q; /* lru queue; cm_scacheLock */
47 struct cm_scache *nextp; /* next in hash; cm_scacheLock */
49 long flags; /* flags; locked by mx */
51 /* synchronization stuff */
52 osi_mutex_t mx; /* mutex for this structure */
53 osi_rwlock_t bufCreateLock; /* read-locked during buffer creation;
54 * write-locked to prevent buffers from
55 * being created during a truncate op, etc.
57 int refCount; /* reference count; cm_scacheLock */
58 osi_queueData_t *bufReadsp; /* queue of buffers being read */
59 osi_queueData_t *bufWritesp; /* queue of buffers being written */
61 /* parent info for ACLs */
62 long parentVnode; /* parent vnode for ACL callbacks */
63 long parentUnique; /* for ACL callbacks */
65 /* local modification stat */
66 long mask; /* for clientModTime, length and
70 int fileType; /* file type */
71 unsigned long clientModTime; /* mtime */
72 unsigned long serverModTime; /* at server, for concurrent call
74 osi_hyper_t length; /* file length */
75 cm_prefetch_t prefetch; /* prefetch info structure */
76 int unixModeBits; /* unix protection mode bits */
77 int linkCount; /* link count */
78 long dataVersion; /* data version */
79 long owner; /* file owner */
80 long group; /* file owning group */
82 /* pseudo file status */
83 osi_hyper_t serverLength; /* length known to server */
86 osi_hyper_t truncPos; /* file size to truncate to before
89 /* symlink and mount point info */
90 char *mountPointStringp; /* the string stored in a mount point;
91 * first char is type, then vol name.
92 * If this is a normal symlink, we store
93 * the link contents here.
95 cm_fid_t *mountRootFidp; /* mounted on root */
96 unsigned int mountRootGen; /* time to update mountRootFidp? */
97 cm_fid_t *dotdotFidp; /* parent of volume root */
100 struct cm_server *cbServerp; /* server granting callback */
101 long cbExpires; /* time callback expires */
104 long anyAccess; /* anonymous user's access */
105 struct cm_aclent *randomACLp; /* access cache entries */
108 osi_queue_t *fileLocks;
111 struct cm_volume *volp; /* volume info; held reference */
113 /* bulk stat progress */
114 osi_hyper_t bulkStatProgress; /* track bulk stats of large dirs */
117 short openReads; /* opens for reading */
118 short openWrites; /* open for writing */
119 short openShares; /* open for read excl */
120 short openExcls; /* open for exclusives */
123 /* mask field - tell what has been modified */
124 #define CM_SCACHEMASK_CLIENTMODTIME 1 /* client mod time */
125 #define CM_SCACHEMASK_LENGTH 2 /* length */
126 #define CM_SCACHEMASK_TRUNCPOS 4 /* truncation position */
128 /* fileType values */
129 #define CM_SCACHETYPE_FILE 1 /* a file */
130 #define CM_SCACHETYPE_DIRECTORY 2 /* a dir */
131 #define CM_SCACHETYPE_SYMLINK 3 /* a symbolic link */
132 #define CM_SCACHETYPE_MOUNTPOINT 4 /* a mount point */
135 #define CM_SCACHEFLAG_STATD 1 /* status info is valid */
136 #define CM_SCACHEFLAG_DELETED 2 /* file has been deleted */
137 #define CM_SCACHEFLAG_CALLBACK 4 /* have a valid callback */
138 #define CM_SCACHEFLAG_STORING 8 /* status being stored back */
139 #define CM_SCACHEFLAG_FETCHING 0x10 /* status being fetched */
140 #define CM_SCACHEFLAG_SIZESTORING 0x20 /* status being stored that
141 * changes the data; typically,
142 * this is a truncate op. */
143 #define CM_SCACHEFLAG_INHASH 0x40 /* in the hash table */
144 #define CM_SCACHEFLAG_BULKSTATTING 0x80 /* doing a bulk stat */
145 #define CM_SCACHEFLAG_WAITING 0x200 /* waiting for fetch/store
147 #define CM_SCACHEFLAG_PURERO 0x400 /* read-only (not even backup);
148 * for mount point eval */
149 #define CM_SCACHEFLAG_RO 0x800 /* read-only
150 * (can't do write ops) */
151 #define CM_SCACHEFLAG_GETCALLBACK 0x1000 /* we're getting a callback */
152 #define CM_SCACHEFLAG_DATASTORING 0x2000 /* data being stored */
153 #define CM_SCACHEFLAG_PREFETCHING 0x4000 /* somebody is prefetching */
154 #define CM_SCACHEFLAG_OVERQUOTA 0x8000 /* over quota */
155 #define CM_SCACHEFLAG_OUTOFSPACE 0x10000 /* out of space */
156 #define CM_SCACHEFLAG_ASYNCSTORING 0x20000 /* scheduled to store back */
157 #define CM_SCACHEFLAG_LOCKING 0x40000 /* setting/clearing file lock */
158 #define CM_SCACHEFLAG_WATCHED 0x80000 /* directory being watched */
159 #define CM_SCACHEFLAG_WATCHEDSUBTREE 0x100000 /* dir subtree being watched */
160 #define CM_SCACHEFLAG_ANYWATCH \
161 (CM_SCACHEFLAG_WATCHED | CM_SCACHEFLAG_WATCHEDSUBTREE)
163 /* sync flags for calls to the server. The CM_SCACHEFLAG_FETCHING,
164 * CM_SCACHEFLAG_STORING and CM_SCACHEFLAG_SIZESTORING flags correspond to the
165 * below, except for FETCHDATA and STOREDATA, which correspond to non-null
166 * buffers in bufReadsp and bufWritesp.
167 * These flags correspond to individual RPCs that we may be making, and at most
168 * one can be set in any one call to SyncOp.
170 #define CM_SCACHESYNC_FETCHSTATUS 1 /* fetching status info */
171 #define CM_SCACHESYNC_STORESTATUS 2 /* storing status info */
172 #define CM_SCACHESYNC_FETCHDATA 4 /* fetch data */
173 #define CM_SCACHESYNC_STOREDATA 8 /* store data */
174 #define CM_SCACHESYNC_STORESIZE 0x10 /* store new file size */
175 #define CM_SCACHESYNC_GETCALLBACK 0x20 /* fetching a callback */
176 #define CM_SCACHESYNC_STOREDATA_EXCL 0x40 /* store data */
177 #define CM_SCACHESYNC_ASYNCSTORE 0x80 /* schedule data store */
178 #define CM_SCACHESYNC_LOCK 0x100 /* set/clear file lock */
180 /* sync flags for calls within the client; there are no corresponding flags
181 * in the scache entry, because we hold the scache entry locked during the
184 #define CM_SCACHESYNC_GETSTATUS 0x1000 /* read the status */
185 #define CM_SCACHESYNC_SETSTATUS 0x2000 /* e.g. utimes */
186 #define CM_SCACHESYNC_READ 0x4000 /* read data from a chunk */
187 #define CM_SCACHESYNC_WRITE 0x8000 /* write data to a chunk */
188 #define CM_SCACHESYNC_SETSIZE 0x10000 /* shrink the size of a file,
190 #define CM_SCACHESYNC_NEEDCALLBACK 0x20000 /* need a callback on the file */
191 #define CM_SCACHESYNC_CHECKRIGHTS 0x40000 /* check that user has desired
193 #define CM_SCACHESYNC_BUFLOCKED 0x80000 /* the buffer is locked */
194 #define CM_SCACHESYNC_NOWAIT 0x100000/* don't wait for the state,
197 /* flags for cm_MergeStatus */
198 #define CM_MERGEFLAG_FORCE 1 /* check mtime before merging;
199 * used to see if we're merging
203 /* hash define. Must not include the cell, since the callback revocation code
204 * doesn't necessarily know the cell in the case of a multihomed server
205 * contacting us from a mystery address.
207 #define CM_SCACHE_HASH(fidp) (((unsigned long) \
213 extern cm_scache_t cm_fakeSCache;
215 extern void cm_InitSCache(long);
217 extern long cm_GetSCache(cm_fid_t *, cm_scache_t **, struct cm_user *,
220 extern void cm_PutSCache(cm_scache_t *);
222 extern cm_scache_t *cm_GetNewSCache(void);
224 extern int cm_FidCmp(cm_fid_t *, cm_fid_t *);
226 extern long cm_SyncOp(cm_scache_t *, struct cm_buf *, struct cm_user *,
227 struct cm_req *, long, long);
229 extern void cm_SyncOpDone(cm_scache_t *, struct cm_buf *, long);
231 extern void cm_MergeStatus(cm_scache_t *, struct AFSFetchStatus *, struct AFSVolSync *,
232 struct cm_user *, int flags);
234 extern void cm_AFSFidFromFid(struct AFSFid *, cm_fid_t *);
236 extern void cm_HoldSCache(cm_scache_t *);
238 extern void cm_ReleaseSCache(cm_scache_t *);
240 extern cm_scache_t *cm_FindSCache(cm_fid_t *fidp);
242 extern long cm_hashTableSize;
244 extern osi_rwlock_t cm_scacheLock;
246 extern osi_queue_t *cm_allFileLocks;
248 extern cm_scache_t **cm_hashTablep;
250 extern void cm_DiscardSCache(cm_scache_t *scp);
252 #endif /* __CM_SCACHE_H_ENV__ */