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 #define MOUNTPOINTLEN 1024 /* max path length for symlink; same as AFSPATHMAX */
15 typedef struct cm_fid {
24 /* Key used for byte range locking. Each unique key identifies a
25 unique client per cm_scache_t for the purpose of locking. */
26 typedef afs_uint64 cm_key_t;
28 typedef struct cm_range {
35 typedef struct cm_scache cm_scache_t;
37 typedef struct cm_file_lock {
38 osi_queue_t q; /* list of all locks [protected by
40 osi_queue_t fileq; /* per-file list of locks [protected
43 cm_user_t *userp; /* The user to which this lock belongs
44 to [immutable; held] */
45 cm_scache_t *scp; /* The scache to which this lock
46 applies to [immutable; held] */
51 cm_range_t range; /* Range for the lock [immutable] */
52 cm_key_t key; /* Key for the lock [immutable] */
53 unsigned char lockType; /* LockRead or LockWrite [immutable] */
54 unsigned char flags; /* combination of CM_FILELOCK_FLAG__*
55 * [protected by cm_scacheLock] */
56 time_t lastUpdate; /* time of last assertion with
57 * server. [protected by
61 #define CM_FILELOCK_FLAG_DELETED 0x01
62 #define CM_FILELOCK_FLAG_LOST 0x02
64 /* the following are mutually exclusive */
65 #define CM_FILELOCK_FLAG_WAITLOCK 0x04
66 #define CM_FILELOCK_FLAG_WAITUNLOCK 0x0C
68 /* the following is used to indicate that there are no server side
69 locks associated with this lock. This is true for locks obtained
70 against files in RO volumes as well as files residing on servers
71 that disable client side byte range locking. */
72 #define CM_FILELOCK_FLAG_CLIENTONLY 0x10
74 #define CM_FLSHARE_OFFSET_HIGH 0x01000000
75 #define CM_FLSHARE_OFFSET_LOW 0x00000000
76 #define CM_FLSHARE_LENGTH_HIGH 0x00000000
77 #define CM_FLSHARE_LENGTH_LOW 0x00000001
79 typedef struct cm_prefetch { /* last region scanned for prefetching */
80 osi_hyper_t base; /* start of region */
81 osi_hyper_t end; /* first char past region */
84 #define CM_SCACHE_MAGIC ('S' | 'C'<<8 | 'A'<<16 | 'C'<<24)
86 typedef struct cm_scache {
87 osi_queue_t q; /* lru queue; cm_scacheLock */
89 struct cm_scache *nextp; /* next in hash; cm_scacheLock */
90 struct cm_scache *allNextp; /* next in all scache list; cm_scacheLock */
92 afs_uint32 flags; /* flags; locked by mx */
94 /* synchronization stuff */
95 osi_mutex_t mx; /* mutex for this structure */
96 osi_rwlock_t bufCreateLock; /* read-locked during buffer creation;
97 * write-locked to prevent buffers from
98 * being created during a truncate op, etc.
100 afs_int32 refCount; /* reference count; cm_scacheLock */
101 osi_queueData_t *bufReadsp; /* queue of buffers being read */
102 osi_queueData_t *bufWritesp; /* queue of buffers being written */
104 /* parent info for ACLs */
105 afs_uint32 parentVnode; /* parent vnode for ACL callbacks */
106 afs_uint32 parentUnique; /* for ACL callbacks */
108 /* local modification stat */
109 afs_uint32 mask; /* for clientModTime, length and
113 afs_uint32 fileType; /* file type */
114 time_t clientModTime; /* mtime */
115 time_t serverModTime; /* at server, for concurrent call
117 osi_hyper_t length; /* file length */
118 cm_prefetch_t prefetch; /* prefetch info structure */
119 afs_uint32 unixModeBits; /* unix protection mode bits */
120 afs_uint32 linkCount; /* link count */
121 afs_uint64 dataVersion; /* data version */
122 afs_uint32 owner; /* file owner */
123 afs_uint32 group; /* file owning group */
124 cm_user_t *creator; /* user, if new file */
126 /* pseudo file status */
127 osi_hyper_t serverLength; /* length known to server */
129 /* aux file status */
130 osi_hyper_t truncPos; /* file size to truncate to before
133 /* symlink and mount point info */
134 char mountPointStringp[MOUNTPOINTLEN]; /* the string stored in a mount point;
135 * first char is type, then vol name.
136 * If this is a normal symlink, we store
137 * the link contents here.
139 cm_fid_t mountRootFid; /* mounted on root */
140 time_t mountRootGen; /* time to update mountRootFidp? */
141 cm_fid_t dotdotFid; /* parent of volume root */
144 struct cm_server *cbServerp; /* server granting callback */
145 time_t cbExpires; /* time callback expires */
148 long anyAccess; /* anonymous user's access */
149 struct cm_aclent *randomACLp; /* access cache entries */
152 afs_int32 serverLock; /* current lock we have acquired on
153 * this file. One of (-1), LockRead
154 * or LockWrite. [protected by
155 * scp->mx]. In the future, this
156 * should be replaced by a queue of
157 * cm_server_lock_t objects which keep
158 * track of lock type, the user for
159 * whom the lock was obtained, the
160 * dataVersion at the time the lock
161 * was asserted last, lastRefreshCycle
162 * and lateUpdateTime.
164 unsigned long lastRefreshCycle; /* protected with cm_scacheLock
165 * for all scaches. */
166 afs_uint64 lockDataVersion; /* dataVersion of the scp at the time
167 the server lock for the scp was
168 asserted for this lock the last
170 osi_queue_t *fileLocksH; /* queue of locks (head) */
171 osi_queue_t *fileLocksT; /* queue of locks (tail) */
173 afs_uint32 sharedLocks; /* number of shared locks on
174 * ::fileLocks. This count does not
175 * include locks which have
176 * CM_FILELOCK_FLAG_CLIENTONLY set. */
178 afs_uint32 exclusiveLocks; /* number of exclusive locks on
179 * ::fileLocks. This count does not
180 * include locks which have
181 * CM_FILELOCK_FLAG_CLIENTONLY set.
184 afs_uint32 clientLocks; /* number of locks on ::fileLocks that
185 have CM_FILELOCK_FLAG_CLIENTONLY
189 struct cm_volume *volp; /* volume info; held reference */
191 /* bulk stat progress */
192 osi_hyper_t bulkStatProgress; /* track bulk stats of large dirs */
195 /* directory B+ tree */ /* only allocated if is directory */
196 osi_rwlock_t dirlock; /* controls access to dirBplus */
197 afs_uint64 dirDataVersion; /* data version represented by dirBplus */
198 struct tree *dirBplus; /* dirBplus */
202 afs_uint16 openReads; /* open for reading */
203 afs_uint16 openWrites; /* open for writing */
204 afs_uint16 openShares; /* open for read excl */
205 afs_uint16 openExcls; /* open for exclusives */
208 afs_uint32 waitCount; /* number of threads waiting */
209 afs_uint32 waitRequests; /* num of thread wait requests */
210 osi_queue_t * waitQueueH; /* Queue of waiting threads.
213 objects. Protected by
215 osi_queue_t * waitQueueT; /* locked by cm_scacheLock */
218 /* mask field - tell what has been modified */
219 #define CM_SCACHEMASK_CLIENTMODTIME 1 /* client mod time */
220 #define CM_SCACHEMASK_LENGTH 2 /* length */
221 #define CM_SCACHEMASK_TRUNCPOS 4 /* truncation position */
223 /* fileType values */
224 #define CM_SCACHETYPE_FILE 1 /* a file */
225 #define CM_SCACHETYPE_DIRECTORY 2 /* a dir */
226 #define CM_SCACHETYPE_SYMLINK 3 /* a symbolic link */
227 #define CM_SCACHETYPE_MOUNTPOINT 4 /* a mount point */
228 #define CM_SCACHETYPE_DFSLINK 5 /* a Microsoft Dfs link */
229 #define CM_SCACHETYPE_INVALID 99 /* an invalid link */
232 #define CM_SCACHEFLAG_STATD 0x01 /* status info is valid */
233 #define CM_SCACHEFLAG_DELETED 0x02 /* file has been deleted */
234 #define CM_SCACHEFLAG_CALLBACK 0x04 /* have a valid callback */
235 #define CM_SCACHEFLAG_STORING 0x08 /* status being stored back */
236 #define CM_SCACHEFLAG_FETCHING 0x10 /* status being fetched */
237 #define CM_SCACHEFLAG_SIZESTORING 0x20 /* status being stored that
238 * changes the data; typically,
239 * this is a truncate op. */
240 #define CM_SCACHEFLAG_INHASH 0x40 /* in the hash table */
241 #define CM_SCACHEFLAG_BULKSTATTING 0x80 /* doing a bulk stat */
242 #define CM_SCACHEFLAG_WAITING 0x200 /* waiting for fetch/store
244 #define CM_SCACHEFLAG_PURERO 0x400 /* read-only (not even backup);
245 * for mount point eval */
246 #define CM_SCACHEFLAG_RO 0x800 /* read-only
247 * (can't do write ops) */
248 #define CM_SCACHEFLAG_GETCALLBACK 0x1000 /* we're getting a callback */
249 #define CM_SCACHEFLAG_DATASTORING 0x2000 /* data being stored */
250 #define CM_SCACHEFLAG_PREFETCHING 0x4000 /* somebody is prefetching */
251 #define CM_SCACHEFLAG_OVERQUOTA 0x8000 /* over quota */
252 #define CM_SCACHEFLAG_OUTOFSPACE 0x10000 /* out of space */
253 #define CM_SCACHEFLAG_ASYNCSTORING 0x20000 /* scheduled to store back */
254 #define CM_SCACHEFLAG_LOCKING 0x40000 /* setting/clearing file lock */
255 #define CM_SCACHEFLAG_WATCHED 0x80000 /* directory being watched */
256 #define CM_SCACHEFLAG_WATCHEDSUBTREE 0x100000 /* dir subtree being watched */
257 #define CM_SCACHEFLAG_ANYWATCH \
258 (CM_SCACHEFLAG_WATCHED | CM_SCACHEFLAG_WATCHEDSUBTREE)
260 #define CM_SCACHEFLAG_EACCESS 0x200000 /* Bulk Stat returned EACCES */
261 #define CM_SCACHEFLAG_SMB_FID 0x400000
263 /* sync flags for calls to the server. The CM_SCACHEFLAG_FETCHING,
264 * CM_SCACHEFLAG_STORING and CM_SCACHEFLAG_SIZESTORING flags correspond to the
265 * below, except for FETCHDATA and STOREDATA, which correspond to non-null
266 * buffers in bufReadsp and bufWritesp.
267 * These flags correspond to individual RPCs that we may be making, and at most
268 * one can be set in any one call to SyncOp.
270 #define CM_SCACHESYNC_FETCHSTATUS 0x01 /* fetching status info */
271 #define CM_SCACHESYNC_STORESTATUS 0x02 /* storing status info */
272 #define CM_SCACHESYNC_FETCHDATA 0x04 /* fetch data */
273 #define CM_SCACHESYNC_STOREDATA 0x08 /* store data */
274 #define CM_SCACHESYNC_STORESIZE 0x10 /* store new file size */
275 #define CM_SCACHESYNC_GETCALLBACK 0x20 /* fetching a callback */
276 #define CM_SCACHESYNC_STOREDATA_EXCL 0x40 /* store data */
277 #define CM_SCACHESYNC_ASYNCSTORE 0x80 /* schedule data store */
278 #define CM_SCACHESYNC_LOCK 0x100 /* set/clear file lock */
280 /* sync flags for calls within the client; there are no corresponding flags
281 * in the scache entry, because we hold the scache entry locked during the
284 #define CM_SCACHESYNC_GETSTATUS 0x1000 /* read the status */
285 #define CM_SCACHESYNC_SETSTATUS 0x2000 /* e.g. utimes */
286 #define CM_SCACHESYNC_READ 0x4000 /* read data from a chunk */
287 #define CM_SCACHESYNC_WRITE 0x8000 /* write data to a chunk */
288 #define CM_SCACHESYNC_SETSIZE 0x10000 /* shrink the size of a file,
290 #define CM_SCACHESYNC_NEEDCALLBACK 0x20000 /* need a callback on the file */
291 #define CM_SCACHESYNC_CHECKRIGHTS 0x40000 /* check that user has desired
293 #define CM_SCACHESYNC_BUFLOCKED 0x80000 /* the buffer is locked */
294 #define CM_SCACHESYNC_NOWAIT 0x100000/* don't wait for the state,
296 #define CM_SCACHESYNC_FORCECB 0x200000/* when calling cm_GetCallback()
297 * set the force flag */
299 /* flags for cm_RecycleSCache */
300 #define CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS 0x1
302 /* flags for cm_MergeStatus */
303 #define CM_MERGEFLAG_FORCE 1 /* check mtime before merging;
304 * used to see if we're merging
307 #define CM_MERGEFLAG_STOREDATA 2 /* Merge due to storedata op */
308 #define CM_MERGEFLAG_DIROP 4 /* Merge due to directory op */
310 /* hash define. Must not include the cell, since the callback revocation code
311 * doesn't necessarily know the cell in the case of a multihomed server
312 * contacting us from a mystery address.
314 #define CM_SCACHE_HASH(fidp) (((unsigned long) \
318 % cm_data.scacheHashTableSize)
323 typedef struct cm_scache_waiter {
330 } cm_scache_waiter_t;
332 extern void cm_InitSCache(int, long);
334 #ifdef DEBUG_REFCOUNT
335 extern long cm_GetSCacheDbg(cm_fid_t *, cm_scache_t **, struct cm_user *,
336 struct cm_req *, char *, long);
338 #define cm_GetSCache(a,b,c,d) cm_GetSCacheDbg(a,b,c,d,__FILE__,__LINE__)
340 extern long cm_GetSCache(cm_fid_t *, cm_scache_t **, struct cm_user *,
344 extern cm_scache_t *cm_GetNewSCache(void);
346 extern __inline int cm_FidCmp(cm_fid_t *, cm_fid_t *);
348 extern void cm_SetFid(cm_fid_t *, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique);
350 extern long cm_SyncOp(cm_scache_t *, struct cm_buf *, struct cm_user *,
351 struct cm_req *, afs_uint32, afs_uint32);
353 extern void cm_SyncOpDone(cm_scache_t *, struct cm_buf *, afs_uint32);
355 extern void cm_MergeStatus(cm_scache_t * dscp, cm_scache_t * scp,
356 struct AFSFetchStatus * statusp,
357 struct AFSVolSync * volsyncp,
358 struct cm_user *userp,
361 extern void cm_AFSFidFromFid(struct AFSFid *, cm_fid_t *);
363 #ifdef DEBUG_REFCOUNT
364 extern void cm_HoldSCacheNoLockDbg(cm_scache_t *, char *, long);
366 extern void cm_HoldSCacheDbg(cm_scache_t *, char *, long);
368 extern void cm_ReleaseSCacheNoLockDbg(cm_scache_t *, char *, long);
370 extern void cm_ReleaseSCacheDbg(cm_scache_t *, char *, long);
372 #define cm_HoldSCacheNoLock(scp) cm_HoldSCacheNoLockDbg(scp, __FILE__, __LINE__)
373 #define cm_HoldSCache(scp) cm_HoldSCacheDbg(scp, __FILE__, __LINE__)
374 #define cm_ReleaseSCacheNoLock(scp) cm_ReleaseSCacheNoLockDbg(scp, __FILE__, __LINE__)
375 #define cm_ReleaseSCache(scp) cm_ReleaseSCacheDbg(scp, __FILE__, __LINE__)
377 extern void cm_HoldSCacheNoLock(cm_scache_t *);
379 extern void cm_HoldSCache(cm_scache_t *);
381 extern void cm_ReleaseSCacheNoLock(cm_scache_t *);
383 extern void cm_ReleaseSCache(cm_scache_t *);
385 extern cm_scache_t *cm_FindSCache(cm_fid_t *fidp);
387 extern cm_scache_t *cm_FindSCacheParent(cm_scache_t *);
389 extern osi_rwlock_t cm_scacheLock;
391 extern osi_queue_t *cm_allFileLocks;
393 extern osi_queue_t *cm_freeFileLocks;
395 extern unsigned long cm_lockRefreshCycle;
397 extern void cm_DiscardSCache(cm_scache_t *scp);
399 extern int cm_FindFileType(cm_fid_t *fidp);
401 extern long cm_ValidateSCache(void);
403 extern long cm_ShutdownSCache(void);
405 extern void cm_SuspendSCache(void);
407 extern long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags);
409 extern void cm_RemoveSCacheFromHashTable(cm_scache_t *scp);
410 #endif /* __CM_SCACHE_H_ENV__ */