Import Upstream version 1.8.5
[hcoop/debian/openafs.git] / src / afs / afs.h
1 /*
2 * Copyright 2000, International Business Machines Corporation and others.
3 * All Rights Reserved.
4 *
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
8 */
9
10 #ifndef _AFS_H_
11 #define _AFS_H_
12 /*
13 * AFS system call opcodes
14 */
15 #ifdef KDUMP_KERNEL
16 #include <afs/afs_args.h>
17 #include <afs/afs_consts.h>
18 #else
19 #include "afs/afs_args.h"
20 #include "afs/afs_consts.h"
21 #endif
22
23 /* jhash.h is a standalone header and is fine to pull into kernel code. */
24 #include <opr/jhash.h>
25
26 /*
27 * afs_fsfragsize cannot be less than 1023, or some cache-tracking
28 * calculations will be incorrect (since we track cache usage in kb).
29 * Some filesystems have fundamental blocksizes less than 1k, and
30 * normally we would tune afs_fsfragsize to be fragsize-1, but we must
31 * make sure to check that afs_fsfragsize does not go below this value.
32 */
33 #define AFS_MIN_FRAGSIZE 1023
34
35 /* Upper bound on number of iovecs out uio routines will deal with. */
36 #define AFS_MAXIOVCNT 16
37
38 enum afs_shutdown_state {
39 AFS_RUNNING = 0,
40 AFS_FLUSHING_CB = 1,
41 AFS_SHUTDOWN = 2,
42 };
43 extern enum afs_shutdown_state afs_shuttingdown;
44
45 /*
46 * Macros to uniquely identify the AFS vfs struct
47 */
48 #define AFS_VFSMAGIC 0x1234
49 #if defined(AFS_SUN5_ENV) || defined(AFS_HPUX90_ENV) || defined(AFS_LINUX20_ENV)
50 #define AFS_VFSFSID 99
51 #else
52 #if defined(AFS_SGI_ENV)
53 #define AFS_VFSFSID afs_fstype
54 #else
55 #define AFS_VFSFSID AFS_MOUNT_AFS
56 #endif
57 #endif
58 /* use this value for reporting total space, free space, etc.
59 * fake a high number to satisfy programs that use the statfs call to make sure
60 * that there's enough space in the device partition before storing something
61 * there. keep it just under 2^31, to try and be safe about not breaking
62 * stuff that looks at the amount of free space. */
63 #define AFS_VFS_FAKEFREE (2147483647)
64
65 /* Moved from VNOPS/afs_vnop_flocks so can be used in prototypes */
66 #if defined(AFS_HPUX102_ENV)
67 #define AFS_FLOCK k_flock
68 #else
69 #if defined(AFS_SUN5_ENV) || (defined(AFS_LINUX24_ENV) && !(defined(AFS_LINUX26_ENV) && defined(AFS_LINUX_64BIT_KERNEL)))
70 #define AFS_FLOCK flock64
71 #else
72 #define AFS_FLOCK flock
73 #endif /* AFS_SUN65_ENV */
74 #endif /* AFS_HPUX102_ENV */
75
76 /* The following are various levels of afs debugging */
77 #define AFSDEB_GENERAL 1 /* Standard debugging */
78 #define AFSDEB_NETWORK 2 /* low level afs networking */
79 #define AFSDEB_RX 4 /* RX debugging */
80 #define AFSDEB_VNLAYER 8 /* interface layer to AFS (aixops, gfsops, etc) */
81
82 /* generic undefined vice id */
83 #define UNDEFVID (-1)
84
85 /* The basic defines for the Andrew file system
86 better keep things powers of two so "& (foo-1)" hack works for masking bits */
87 #define NBRS 15 /* max number of queued daemon requests */
88 #define NUSERS 16 /* hash table size for unixuser table */
89 #define NSERVERS 16 /* hash table size for server table */
90 #define NVOLS 64 /* hash table size for volume table */
91 #define NFENTRIES 256 /* hash table size for disk volume table */
92 #define VCSIZEBITS 16 /* log of stat cache hash table size */
93 #define VCSIZE (opr_jhash_size(VCSIZEBITS))
94 #define CBRSIZE 512 /* call back returns hash table size */
95 #define PIGGYSIZE 1350 /* max piggyback size */
96 #define MAXVOLS 128 /* max vols we can store */
97 #define MAXSYSNAME 128 /* max sysname (i.e. @sys) size */
98 #define MAXNUMSYSNAMES 32 /* max that current constants allow */
99 #define MAXROOTVOLNAMELEN 64 /* max length of root volume name */
100 #define NOTOKTIMEOUT (2*3600) /* time after which to timeout conns sans tokens */
101 #define NOPAG 0xffffffff
102
103
104
105 #define AFS_MAXCBRSCALL 32 /* max to return in a given call (must be <= AFSCBMAX) */
106 #define VCACHE_FREE 5
107 #define AFS_NRXPACKETS 80
108 #define AFS_RXDEADTIME 50
109 #define AFS_HARDDEADTIME 120
110 #define AFS_IDLEDEADTIME 1200
111 #define AFS_IDLEDEADTIME_REP 180 /* more than fs's cb dead time */
112 #define AFS_BLKBITS 12
113 #define AFS_BLKSIZE (1 << AFS_BLKBITS)
114
115 extern afs_int32 afs_rx_deadtime;
116 extern afs_int32 afs_rx_harddead;
117 extern afs_int32 afs_rx_idledead;
118 extern afs_int32 afs_rx_idledead_rep;
119
120 struct sysname_info {
121 char *name;
122 short offset;
123 signed char index, allocked;
124 };
125
126 /* flags to use with AFSOP_CACHEINIT */
127 #define AFSCALL_INIT_MEMCACHE 0x1 /* use a memory-based cache */
128
129 /* below here used only for kernel procedures */
130 #ifdef KERNEL
131 /* Store synchrony flags - SYNC means that data should be forced to server's
132 * disk immediately upon completion. */
133 #define AFS_ASYNC 0
134 #define AFS_SYNC 1
135 #define AFS_VMSYNC_INVAL 2 /* sync and invalidate pages */
136 #define AFS_LASTSTORE 4
137 #define AFS_VMSYNC 8 /* sync pages but do not invalidate */
138
139 /* background request structure */
140 #define BPARMS 4
141
142 #define BOP_NOOP 0 /* leave 0 unused */
143 #define BOP_FETCH 1 /* parm1 is chunk to get */
144 #define BOP_STORE 2 /* parm1 is chunk to store */
145 #define BOP_PATH 3 /* parm1 is path, parm2 is chunk to fetch */
146 #define BOP_FETCH_NOCACHE 4 /* parms are: vnode ptr, offset, segment ptr, addr, cred ptr */
147 #ifdef AFS_DARWIN_ENV
148 #define BOP_MOVE 5 /* ptr1 afs_uspc_param ptr2 sname ptr3 dname */
149 #endif
150 #define BOP_PARTIAL_STORE 6 /* parm1 is chunk to store */
151
152 #define B_DONTWAIT 1 /* On failure return; don't wait */
153
154 /* protocol is: refCount is incremented by user to take block out of free pool.
155 Next, BSTARTED is set when daemon finds request. This prevents
156 other daemons from picking up the same request. Finally, when
157 request is done, refCount is zeroed. BDONE and BWAIT are used by
158 dudes waiting for operation to proceed to a certain point before returning.
159 */
160 #define BSTARTED 1 /* request picked up by a daemon */
161 #define BUVALID 2 /* code is valid (store) */
162 #define BUWAIT 4 /* someone is waiting for BUVALID */
163 struct brequest {
164 struct vcache *vc; /* vnode to use, with vrefcount bumped */
165 afs_ucred_t *cred; /* credentials to use for operation */
166 afs_size_t size_parm[BPARMS]; /* random parameters */
167 void *ptr_parm[BPARMS]; /* pointer parameters */
168 afs_int32 code_raw; /* return code from AFS routines */
169 afs_int32 code_checkcode; /* the afs_CheckCode-translated code */
170 short refCount; /* use counter for this structure */
171 char opcode; /* what to do (store, fetch, etc) */
172 char flags; /* free, etc */
173 afs_int32 ts; /* counter "timestamp" */
174 };
175
176 struct SecretToken {
177 char data[56];
178 };
179
180 struct ClearToken {
181 afs_int32 AuthHandle;
182 char HandShakeKey[8];
183 afs_int32 ViceId;
184 afs_int32 BeginTimestamp;
185 afs_int32 EndTimestamp;
186 };
187
188 struct VenusFid {
189 afs_int32 Cell; /* better sun packing if at end of structure */
190 struct AFSFid Fid;
191 };
192
193 /* Temporary struct to be passed between afs_fid and afs_vget; in SunOS4.x we can only pass a maximum of 10 bytes for a handle (we ideally need 16!) */
194 struct SmallFid {
195 afs_int32 Volume;
196 afs_int32 CellAndUnique;
197 u_short Vnode;
198 };
199 /* The actual number of bytes in the SmallFid, not the sizeof struct. */
200 #define SIZEOF_SMALLFID 10
201
202 /* Queues
203 * ------
204 *
205 * Circular queues, implemented with pointers. Structures may contain as many
206 * queues as required, which may be located at any point within the structure,
207 * providing the QEntry macro is used to translate between a queue pointer, and
208 * the address of its containing structure
209 */
210
211 struct afs_q {
212 struct afs_q *next;
213 struct afs_q *prev;
214 };
215
216 #define QZero(e) ((e)->prev = (e)->next = NULL)
217 #define QInit(q) ((q)->prev = (q)->next = (q))
218 #define QAdd(q,e) ((e)->next = (q)->next, (e)->prev = (q), \
219 (q)->next->prev = (e), (q)->next = (e))
220 #define QRemove(e) ((e)->next->prev = (e)->prev, (e)->prev->next = (e)->next, (e)->prev = NULL, (e)->next = NULL)
221 #define QNext(e) ((e)->next)
222 #define QPrev(e) ((e)->prev)
223 #define QEmpty(q) ((q)->prev == (q))
224 /* this one takes q1 and sticks it on the end of q2 - that is, the other end, not the end
225 * that things are added onto. q1 shouldn't be empty, it's silly */
226 #define QCat(q1,q2) ((q2)->prev->next = (q1)->next, (q1)->next->prev=(q2)->prev, (q1)->prev->next=(q2), (q2)->prev=(q1)->prev, (q1)->prev=(q1)->next=(q1))
227
228 /* Given a pointer to an afs_q within a structure, go back to the address of
229 * the parent structure
230 */
231
232 #define QEntry(queue, structure, member) \
233 ((structure *)((char *)(queue)-(char *)(&((structure *)NULL)->member)))
234
235 /* And implement operations for individual lists in terms of the above macro */
236
237 #define QTOV(e) QEntry(e, struct vcache, vlruq)
238 #define QTOC(e) QEntry(e, struct cell, lruq)
239 #define QTOVH(e) QEntry(e, struct vcache, vhashq)
240
241 /*!
242 * List of free slot numbers
243 */
244 struct afs_slotlist {
245 afs_uint32 slot;
246 struct afs_slotlist *next;
247 };
248
249 struct vrequest {
250 afs_int32 uid; /* user id making the request */
251 afs_int32 busyCount; /* how many busies we've seen so far */
252 afs_int32 flags; /* things like O_SYNC, O_NONBLOCK go here */
253 char initd; /* if non-zero, Error fields meaningful */
254 char accessError; /* flags for overriding error return code */
255 char volumeError; /* encountered a missing or busy volume */
256 char networkError; /* encountered network problems */
257 char permWriteError; /* fileserver returns permenent error. */
258 char tokenError; /* a token error other than expired. */
259 char idleError; /* the server idled too long */
260 char skipserver[AFS_MAXHOSTS];
261 afs_int32 lasterror[AFS_MAXHOSTS];
262 };
263 #define VOLMISSING 1
264 #define VOLBUSY 2
265
266 /* structure linked off of a server to keep track of queued returned
267 * callbacks. Sent asynchronously when we run a little low on free dudes.
268 */
269 struct afs_cbr {
270 struct afs_cbr **pprev;
271 struct afs_cbr *next;
272
273 struct afs_cbr **hash_pprev;
274 struct afs_cbr *hash_next;
275
276 struct AFSFid fid;
277 };
278
279 #ifdef AFS_LINUX22_ENV
280 /* On Linux, we have to be able to allocate the storage for this using
281 * kmalloc, as otherwise we may deadlock. So, it needs to be able to fit
282 * in a single page
283 */
284 # define AFS_NCBRS PAGE_SIZE/sizeof(struct afs_cbr)
285 #else
286 # define AFS_NCBRS 1024 /* max # of call back return entries */
287 #endif
288
289 /* cellinfo file magic number */
290 #define AFS_CELLINFO_MAGIC 0xf32817cd
291
292 /* cell flags */
293 #define CNoSUID 0x02 /* disable suid bit for this cell */
294 #define CLinkedCell4 0x04 /* reserved for ADDCELL2 pioctl */
295 #define CNoAFSDB 0x08 /* never bother trying AFSDB */
296 #define CHasVolRef 0x10 /* volumes were referenced */
297 #define CLinkedCell 0x20 /* has a linked cell in lcellp */
298 #define CHush 0x40 /* don't display until referenced */
299
300 struct cell {
301 struct afs_q lruq; /* lru q next and prev */
302 char *cellName; /* char string name of cell */
303 afs_int32 cellIndex; /* sequence number */
304 afs_int32 cellNum; /* semi-permanent cell number */
305 struct server *cellHosts[AFS_MAXCELLHOSTS]; /* volume *location* hosts */
306 struct cell *lcellp; /* Associated linked cell */
307 u_short fsport; /* file server port */
308 u_short vlport; /* volume server port */
309 short states; /* state flags */
310 time_t timeout; /* data expire time, if non-zero */
311 struct cell_name *cnamep; /* pointer to our cell_name */
312 afs_rwlock_t lock; /* protects cell data */
313 unsigned char cellHandle[16]; /* deterministic handle for this cell */
314 };
315
316 struct cell_name {
317 struct cell_name *next;
318 afs_int32 cellnum;
319 char *cellname;
320 char used;
321 };
322
323 struct cell_alias {
324 struct cell_alias *next;
325 afs_int32 index;
326 char *alias;
327 char *cell;
328 };
329
330 #define afs_PutCell(cellp, locktype)
331
332 /* the unixuser flag bit definitions */
333 #define UHasTokens 1 /* are the st and ct fields valid (ever set)? */
334 #define UTokensBad 2 /* are tokens bad? */
335 #define UPrimary 4 /* on iff primary identity */
336 #define UNeedsReset 8 /* needs afs_ResetAccessCache call done */
337 #define UPAGCounted 16 /* entry seen during PAG search (for stats) */
338 #define UNFSGetCreds 32 /* getting creds for NFS client */
339 /* A flag used by afs_GCPAGs to keep track of
340 * which entries in afs_users need to be deleted.
341 * The lifetime of its presence in the table is the
342 * lifetime of the afs_GCPAGs function.
343 */
344 #define TMP_UPAGNotReferenced 128
345
346 /* unixuser notify events */
347 #define UTokensObtained 1
348 #define UTokensDropped 2
349
350 /* values for afs_gcpags */
351 enum { AFS_GCPAGS_NOTCOMPILED = 0, AFS_GCPAGS_OK =
352 1, AFS_GCPAGS_USERDISABLED, AFS_GCPAGS_EPROC0, AFS_GCPAGS_EPROCN,
353 AFS_GCPAGS_EEQPID, AFS_GCPAGS_EINEXACT, AFS_GCPAGS_EPROCEND,
354 AFS_GCPAGS_EPROCWALK, AFS_GCPAGS_ECREDWALK, AFS_GCPAGS_EPIDCHECK,
355 AFS_GCPAGS_ENICECHECK
356 };
357
358 extern afs_int32 afs_gcpags;
359 extern afs_int32 afs_gcpags_procsize;
360 extern afs_int32 afs_bkvolpref;
361 extern char afs_cachebasedir[1024];
362 extern afs_int32 afs_numcachefiles;
363 extern afs_int32 afs_numfilesperdir;
364
365 struct rxkadToken {
366 afs_int32 ticketLen;
367 char * ticket;
368 struct ClearToken clearToken;
369 };
370
371 union tokenUnion {
372 struct rxkadToken rxkad;
373 };
374
375 struct tokenJar {
376 struct tokenJar *next;
377 int type;
378 union tokenUnion content;
379 };
380
381 struct unixuser {
382 struct unixuser *next; /* next hash pointer */
383 afs_int32 uid; /* search based on uid and cell */
384 afs_int32 cell;
385 afs_int32 viceId; /* Optional viced ID corresponding to current tokens */
386 short refCount; /* reference count for allocation */
387 char states; /* flag info */
388 afs_int32 tokenTime; /* last time tokens were set, used for timing out conn data */
389 struct tokenJar *tokens;
390 struct afs_exporter *exporter; /* more info about the exporter for the remote user */
391 void *cellinfo; /* pointer to cell info (PAG manager only) */
392 afs_rwlock_t lock;
393 };
394
395 #define CVEC_LEN 3 /* per-user connection pool */
396
397 struct sa_conn_vector;
398 typedef struct sa_conn_vector * p_sa_conn_vector; /* forward decl */
399
400 #define CONN_REPLICATED 0x1
401
402 struct afs_conn {
403 int refCount;
404 int activated;
405 char forceConnectFS; /* Should we try again with these tokens? */
406 struct rx_connection *id; /* RPC connid */
407 struct sa_conn_vector *parent; /* the con_vector which contains us */
408 };
409
410 /* An sa_conn_vector replaces the erstwhile list of conn
411 structures maintained by the cache manager. The sa_conn_vector
412 contains a C array of connections which, if non-zero, represent
413 connections to AFS servers.
414 */
415
416 struct sa_conn_vector {
417 /* linked-list machinery */
418 struct sa_conn_vector *next;
419
420 /* AFS conn-identifying info */
421 struct unixuser *user; /* user validated with respect to. */
422 struct srvAddr *srvr; /* server associated with this conn */
423 short refCount; /* reference count for allocation */
424 unsigned short port; /* port associated with this connection */
425 int flags;
426
427 /* next connection to return when all in cvec are fully utilized */
428 int select_index;
429
430 /* connections vector */
431 struct afs_conn cvec[CVEC_LEN];
432 };
433
434 #define SQNULL -1
435
436 /* Fid comparison routines */
437 #define FidCmp(a,b) ((a)->Fid.Unique != (b)->Fid.Unique \
438 || (a)->Fid.Vnode != (b)->Fid.Vnode \
439 || (a)->Fid.Volume != (b)->Fid.Volume \
440 || (a)->Cell != (b)->Cell)
441
442 #define FidMatches(afid,tvc) ((tvc)->f.fid.Fid.Vnode == (afid)->Fid.Vnode && \
443 (tvc)->f.fid.Fid.Volume == (afid)->Fid.Volume && \
444 (tvc)->f.fid.Cell == (afid)->Cell && \
445 ( (tvc)->f.fid.Fid.Unique == (afid)->Fid.Unique || \
446 (!(afid)->Fid.Unique && ((tvc)->f.states & CUnique))))
447
448
449 #define SRVADDR_MH 1
450 #define SRVADDR_ISDOWN 0x20 /* same as SRVR_ISDOWN */
451 #define SRVADDR_NOUSE 0x40 /* Don't use this srvAddr */
452
453 struct srvAddr {
454 struct srvAddr *next_bkt; /* next item in hash bucket */
455 struct srvAddr *next_sa; /* another interface on same host */
456 struct server *server; /* back to parent */
457 struct sa_conn_vector *conns; /* All user connections to this server */
458 struct afs_conn *natping;
459 afs_int32 sa_ip; /* Host addr in network byte order */
460 u_short sa_iprank; /* indiv ip address priority */
461 u_short sa_portal; /* port addr in network byte order */
462 u_char sa_flags;
463 };
464
465 /*
466 * Values used in the flags field of the server structure below.
467 *
468 * AFS_SERVER_FLAG_ACTIVATED Has the server ever had a user connection
469 * associated with it?
470 */
471 #define AFS_SERVER_FLAG_ACTIVATED 0x01
472 #define SNO_LHOSTS 0x04
473 #define SYES_LHOSTS 0x08
474 #define SVLSRV_UUID 0x10
475 #define SRVR_ISDOWN 0x20
476 #define SRVR_MULTIHOMED 0x40
477 #define SRVR_ISGONE 0x80
478 #define SNO_INLINEBULK 0x100
479 #define SNO_64BIT 0x200
480 #define SCAPS_KNOWN 0x400
481
482 #define SRV_CAPABILITIES(ts) \
483 { if ( !(ts->flags & SCAPS_KNOWN)) afs_GetCapabilities(ts); ts->capabilities; }
484
485 #define afs_serverSetNo64Bit(s) (((struct sa_conn_vector*)(s)->parent)->srvr->server->flags |= SNO_64BIT)
486 #define afs_serverHasNo64Bit(s) (((struct sa_conn_vector*)(s)->parent)->srvr->server->flags & SNO_64BIT)
487
488 struct server {
489 union {
490 struct {
491 afsUUID suuid;
492 afs_int32 addr_uniquifier;
493 afs_int32 spares[2];
494 } _srvUuid;
495 struct {
496 struct srvAddr haddr;
497 } _srvId;
498 } _suid;
499 #define sr_uuid _suid._srvUuid.suuid
500 #define sr_addr_uniquifier _suid._srvUuid.addr_uniquifier
501 #define sr_host _suid._srvId.haddr.ip
502 #define sr_portal _suid._srvId.haddr.portal
503 #define sr_rank _suid._srvId.haddr.ip_rank
504 #define sr_flags _suid._srvId.haddr.flags
505 #define sr_conns _suid._srvId.haddr.conns
506 struct server *next; /* Ptr to next server in hash chain */
507 struct cell *cell; /* Cell in which this host resides */
508 struct afs_cbr *cbrs; /* Return list of callbacks */
509 afs_int32 activationTime; /* Time when this record was first activated */
510 afs_int32 lastDowntimeStart; /* Time when last downtime incident began */
511 afs_int32 numDowntimeIncidents; /* # (completed) downtime incidents */
512 afs_int32 sumOfDowntimes; /* Total downtime experienced, in seconds */
513 struct srvAddr *addr;
514 afs_uint32 flags; /* Misc flags */
515 afs_int32 capabilities;
516 };
517
518 #define afs_PutServer(servp, locktype)
519
520 /* structs for some pioctls - these are (or should be)
521 * also in venus.h
522 */
523 struct spref {
524 struct in_addr host;
525 unsigned short rank;
526 };
527
528 struct sprefrequest_33 {
529 unsigned short offset;
530 unsigned short num_servers;
531 };
532
533
534 struct sprefrequest { /* new struct for 3.4 */
535 unsigned short offset;
536 unsigned short num_servers;
537 unsigned short flags;
538 };
539 #define DBservers 1
540
541 struct sprefinfo {
542 unsigned short next_offset;
543 unsigned short num_servers;
544 struct spref servers[1]; /* we overrun this array intentionally... */
545 };
546
547 struct setspref {
548 unsigned short flags;
549 unsigned short num_servers;
550 struct spref servers[1]; /* we overrun this array intentionally... */
551 };
552 /* struct for GAG pioctl
553 */
554 struct gaginfo {
555 afs_uint32 showflags, logflags, logwritethruflag, spare[3];
556 unsigned char spare2[128];
557 };
558 #define GAGUSER 1
559 #define GAGCONSOLE 2
560 #define logwritethruON 1
561
562 struct rxparams {
563 afs_int32 rx_initReceiveWindow, rx_maxReceiveWindow, rx_initSendWindow,
564 rx_maxSendWindow, rxi_nSendFrags, rxi_nRecvFrags, rxi_OrphanFragSize;
565 afs_int32 rx_maxReceiveSize, rx_MyMaxSendSize;
566 afs_uint32 spare[21];
567 };
568
569 /* struct for checkservers */
570
571 struct chservinfo {
572 int magic;
573 char tbuffer[128];
574 int tsize;
575 afs_int32 tinterval;
576 afs_int32 tflags;
577 };
578
579
580 /* state bits for volume */
581 #define VRO 1 /* volume is readonly */
582 #define VRecheck 2 /* recheck volume info with server */
583 #define VBackup 4 /* is this a backup volume? */
584 #define VForeign 8 /* this is a non-afs volume */
585 #define VPartVisible 16 /* Volume's partition is visible on the client */
586 #define VHardMount 32 /* we are hard-mount waiting for the vol */
587
588 enum repstate { not_busy, end_not_busy = 6, rd_busy, rdwr_busy, offline };
589
590 struct volume {
591 /* One structure per volume, describing where the volume is located
592 * and where its mount points are. */
593 struct volume *next; /* Next volume in hash list. */
594 afs_int32 cell; /* the cell in which the volume resides */
595 afs_rwlock_t lock; /* the lock for this structure */
596 afs_int32 volume; /* This volume's ID number. */
597 char *name; /* This volume's name, or 0 if unknown */
598 struct server *serverHost[AFS_MAXHOSTS]; /* servers serving this volume */
599 enum repstate status[AFS_MAXHOSTS]; /* busy, offline, etc */
600 struct VenusFid dotdot; /* dir to access as .. */
601 struct VenusFid mtpoint; /* The mount point for this volume. */
602 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
603 afs_int32 roVol;
604 afs_int32 backVol;
605 afs_int32 rwVol; /* For r/o vols, original read/write volume. */
606 afs_int32 setupTime; /* time volume was setup from vldb info */
607 afs_int32 vtix; /* volume table index */
608 afs_int32 copyDate; /* copyDate field, for tracking vol releases */
609 afs_int32 expireTime; /* for per-volume callbacks... */
610 short refCount; /* reference count for allocation */
611 char states; /* here for alignment reasons */
612 };
613
614 #define afs_PutVolume(av, locktype) ((av)->refCount--)
615
616 /* format of an entry in volume info file */
617 struct fvolume {
618 afs_int32 cell; /* cell for this entry */
619 afs_int32 volume; /* volume */
620 afs_int32 next; /* has index */
621 struct VenusFid dotdot; /* .. value */
622 struct VenusFid mtpoint; /* mt point's fid */
623 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
624 };
625
626 struct SimpleLocks {
627 struct SimpleLocks *next;
628 int type;
629 afs_int32 boff, eoff;
630 afs_int32 pid;
631 #if defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
632 afs_int32 sysid;
633 #endif
634 };
635
636 /* vcache state bits */
637 #define CStatd 0x00000001 /* has this file ever been stat'd? */
638 #define CBackup 0x00000002 /* file is on a backup volume */
639 #define CRO 0x00000004 /* is it on a read-only volume */
640 #define CMValid 0x00000008 /* is the mount point info valid? */
641 #define CCore 0x00000010 /* storing a core file, needed since we don't get an open */
642 #define CDirty 0x00000020 /* file has been modified since first open (... O_RDWR) */
643 #define CSafeStore 0x00000040 /* close must wait for store to finish (should be in fd) */
644 #define CMAPPED 0x00000080 /* Mapped files; primarily used by SunOS 4.0.x */
645 #define CNSHARE 0x00000100 /* support O_NSHARE semantics */
646 #define CLied 0x00000200
647 #define CTruth 0x00000400
648
649 #if defined(AFS_DARWIN80_ENV)
650 #define CDeadVnode 0x00000800
651 #elif defined(AFS_DARWIN_ENV)
652 #define CUBCinit 0x00000800
653 #else
654 #define CWRITE_IGN 0x00000800 /* Next OS hack only */
655 #endif
656
657 #define CUnique 0x00001000 /* vc's uniquifier - latest unifiquier for fid */
658 #define CForeign 0x00002000 /* this is a non-afs vcache */
659 #define CReadDir 0x00004000 /* readdir in progress */
660 #define CUnlinked 0x00010000
661 #define CBulkStat 0x00020000 /* loaded by a bulk stat, and not ref'd since */
662 #define CUnlinkedDel 0x00040000
663 #define CVFlushed 0x00080000
664 #if defined(AFS_SGI_ENV)
665 #define CWritingUFS 0x00200000 /* to detect vm deadlock - used by sgi */
666 #elif defined(AFS_DARWIN80_ENV)
667 #define CEvent 0x00200000 /* to preclude deadlock when sending events */
668 #endif
669 #define CCreating 0x00400000 /* avoid needless store after open truncate */
670 #define CPageHog 0x00800000 /* AIX - dumping large cores is a page hog. */
671 #define CCorrupt 0x01000000 /* corrupt dir already reported */
672 #define CDCLock 0x02000000 /* Vnode lock held over call to GetDownD */
673 #define CBulkFetching 0x04000000 /* stats are being fetched by bulk stat */
674 #define CExtendedFile 0x08000000 /* extended file via ftruncate call. */
675 #define CVInit 0x10000000 /* being initialized */
676 #define CMetaDirty 0x20000000 /* vnode meta-data needs to be flushed */
677 #define CPartVisible 0x40000000 /* fileserver partition visible on client */
678
679 /* vcache vstate bits */
680 #define VRevokeWait 0x1
681 #define VPageCleaning 0x2 /* Solaris - Cache Trunc Daemon sez keep out */
682
683 /* Dirty disconnected vcache flags. */
684 #define VDisconSetTime 0x00000001 /* set time. */
685 #define VDisconSetMode 0x00000002 /* set mode. */
686 /* XXX: to be continued ? */
687 #define VDisconTrunc 0x00000020 /* truncate file. */
688 #define VDisconSetAttrMask 0x0000003F /* Masks for setattr ops. */
689 #define VDisconWriteClose 0x00000400 /* Write op on file close. */
690 #define VDisconWriteFlush 0x00000800 /* Write op on normal fsync/flush. */
691 #define VDisconWriteOsiFlush 0x00001000 /* Write op on osi flush. */
692
693 #define VDisconRemove 0x00002000 /* Remove vnop. */
694 #define VDisconCreate 0x00004000 /* Create vnop. */
695 #define VDisconCreated 0x00008000 /* A file that was created during
696 this resync operation */
697 #define VDisconRename 0x00010000 /* Rename vnop. */
698 #define VDisconRenameSameDir 0x00020000 /* Rename in same dir. */
699
700 /*... to be continued ... */
701
702 /* vcache (file) cachingStates bits */
703 #define FCSDesireBypass 0x1 /* This file should bypass the cache */
704 #define FCSBypass 0x2 /* This file is currently NOT being cached */
705 #define FCSManuallySet 0x4 /* The bypass flags were set, or reset, manually (via pioctl)
706 and should not be overridden by the file's name */
707
708 /* Flag values used by the Transition routines */
709 #define TRANSChangeDesiredBit 0x1 /* The Transition routine should set or
710 * reset the FCSDesireBypass bit */
711 #define TRANSVcacheIsLocked 0x2 /* The Transition routine does not need to
712 * lock vcache (it's already locked) */
713 #define TRANSSetManualBit 0x4 /* The Transition routine should set FCSManuallySet so that
714 * filename checking does not override pioctl requests */
715
716 #define CPSIZE 2
717 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
718 #define vrefCount v->v_usecount
719 #elif defined(AFS_SUN511_ENV)
720 # define vrefCount v->v_count
721 #else
722 #define vrefCount v.v_count
723 #endif /* AFS_XBSD_ENV */
724
725 #if defined(AFS_DARWIN80_ENV)
726 #define VREFCOUNT_GT(v, y) vnode_isinuse(AFSTOV(v), (y))
727 #elif defined(AFS_FBSD_ENV)
728 #define VREFCOUNT(v) (vrefcnt(AFSTOV(v)))
729 #define VREFCOUNT_GT(v, y) (vrefcnt(AFSTOV(v)) > y)
730 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
731 #define VREFCOUNT(v) ((v)->vrefCount)
732 #define VREFCOUNT_GT(v, y) (AFSTOV(v)->v_usecount > (y))
733 #elif defined(AFS_LINUX24_ENV)
734 #define VREFCOUNT(v) atomic_read(&(AFSTOV(v)->v_count))
735 #define VREFCOUNT_GT(v, y) (VREFCOUNT(v)>y)
736 #define VREFCOUNT_SET(v, c) atomic_set(&(AFSTOV(v)->v_count), c)
737 #define VREFCOUNT_DEC(v) atomic_dec(&(AFSTOV(v)->v_count))
738 #define VREFCOUNT_INC(v) atomic_inc(&(AFSTOV(v)->v_count))
739 #else
740 #define VREFCOUNT(v) ((v)->vrefCount)
741 #define VREFCOUNT_GT(v,y) ((v)->vrefCount > (y))
742 #define VREFCOUNT_SET(v, c) (v)->vrefCount = c
743 #define VREFCOUNT_DEC(v) (v)->vrefCount--
744 #define VREFCOUNT_INC(v) (v)->vrefCount++
745 #define d_unhash(d) list_empty(&(d)->d_hash)
746 #define dget_locked(d) dget(d)
747 #endif
748
749 #define AFS_MAXDV 0x7fffffff /* largest dataversion number */
750 #ifdef AFS_64BIT_CLIENT
751 #define AFS_NOTRUNC 0x7fffffffffffffffLL /* largest positive int64 number */
752 #else /* AFS_64BIT_CLIENT */
753 #define AFS_NOTRUNC 0x7fffffff /* largest dataversion number */
754 #endif /* AFS_64BIT_CLIENT */
755
756 extern afs_int32 vmPageHog; /* counter for # of vnodes which are page hogs. */
757
758 #if defined(AFS_DARWIN80_ENV)
759 #define VTOAFS(v) ((struct vcache *)vnode_fsnode((v)))
760 #define AFSTOV(vc) ((vc)->v)
761 #elif defined(AFS_NBSD40_ENV)
762 struct nbvdata {
763 struct genfs_node gfsn;
764 struct vcache *afsvc;
765 };
766 #define VTOAFS(v) ((((struct nbvdata *)((v)->v_data)))->afsvc)
767 #define AFSTOV(vc) ((vc)->v)
768 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_SUN511_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE))
769 #define VTOAFS(v) ((struct vcache *)(v)->v_data)
770 #define AFSTOV(vc) ((vc)->v)
771 #else
772 #define VTOAFS(V) ((struct vcache *)(V))
773 #define AFSTOV(V) (&(V)->v)
774 #endif
775
776 struct afs_vnuniq {
777 afs_uint32 vnode;
778 afs_uint32 unique;
779 };
780
781 /* VCache elements which are kept on disk, and in the kernel */
782 struct fvcache {
783 struct VenusFid fid;
784 struct mstat {
785 afs_size_t Length;
786 afs_hyper_t DataVersion;
787 afs_uint32 Date;
788 afs_uint32 Owner;
789 afs_uint32 Group;
790 afs_uint16 Mode; /* XXXX Should be afs_int32 XXXX */
791 afs_uint16 LinkCount;
792 #ifdef AFS_DARWIN80_ENV
793 afs_uint16 Type;
794 #else
795 /* vnode type is in v.v_type */
796 #endif
797 } m;
798 struct afs_vnuniq parent;
799
800 /*! Truncate file to this position at the next store */
801 afs_size_t truncPos;
802
803 /*! System:AnyUser's access to this. */
804 afs_int32 anyAccess;
805
806 /*! state bits */
807 afs_uint32 states;
808
809 /*! Disconnected flags for this vcache element. */
810 afs_uint32 ddirty_flags;
811 /*! Shadow vnode + unique keep the shadow dir location. */
812 struct afs_vnuniq shadow;
813 /*! The old parent FID for renamed vnodes */
814 struct afs_vnuniq oldParent;
815 };
816
817 /* Values for 'mvstat' in struct vcache */
818 #define AFS_MVSTAT_FILE (0x0) /* regular file or directory */
819 #define AFS_MVSTAT_MTPT (0x1) /* mountpoint */
820 #define AFS_MVSTAT_ROOT (0x2) /* volume root dir */
821
822 #ifdef AFS_SUN5_ENV
823 /*
824 * This is for the multiPage field in struct vcache. Each one of these
825 * represents an outstanding getpage request that is larger than a single page.
826 * Recording these is necessary to prevent afs_GetOnePage from trying to evict
827 * a dcache entry that an earlier afs_GetOnePage call got in the same getpage
828 * request. See osi_VM_MultiPageConflict and afs_getpage.
829 */
830 struct multiPage_range {
831 struct afs_q q;
832 offset_t off; /**< offset of getpage request */
833 u_int len; /**< length of getpage request */
834 };
835 #endif
836
837 /* INVARIANTs: (vlruq.next != NULL) == (vlruq.prev != NULL)
838 * nextfree => !vlruq.next && ! vlruq.prev
839 * !(avc->nextfree) && !avc->vlruq.next => (FreeVCList == avc->nextfree)
840 */
841 struct vcache {
842 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_SUN511_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE))
843 struct vnode *v;
844 #else
845 struct vnode v; /* Has reference count in v.v_count */
846 #endif
847 struct afs_q vlruq; /* lru q next and prev */
848 #if !defined(AFS_LINUX22_ENV)
849 struct vcache *nextfree; /* next on free list (if free) */
850 #endif
851 struct vcache *hnext; /* Hash next */
852 struct afs_q vhashq; /* Hashed per-volume list */
853 /*! Queue of dirty vcaches. Lock with afs_disconDirtyLock */
854 struct afs_q dirtyq;
855 /*! Queue of vcaches with shadow entries. Lock with afs_disconDirtyLock */
856 struct afs_q shadowq;
857 /*! Queue of vcaches with dirty metadata. Locked by afs_xvcdirty */
858 struct afs_q metadirty;
859 /*! Vcaches slot number in the disk backup. Protected by tvc->lock */
860 afs_uint32 diskSlot;
861 struct fvcache f;
862 afs_rwlock_t lock; /* The lock on the vcache contents. */
863 #if defined(AFS_SUN5_ENV)
864 /* Lock used to protect the activeV, multipage, and vstates fields.
865 * Do not try to get the vcache lock when the vlock is held */
866 afs_rwlock_t vlock;
867 #endif /* defined(AFS_SUN5_ENV) */
868 #if defined(AFS_SUN5_ENV)
869 krwlock_t rwlock;
870 struct cred *credp;
871 #endif
872 #ifdef AFS_AIX32_ENV
873 afs_lock_t pvmlock;
874 vmhandle_t vmh;
875 #if defined(AFS_AIX51_ENV)
876 vmid_t segid;
877 #else
878 int segid;
879 #endif
880 struct ucred *credp;
881 #endif
882 #ifdef AFS_AIX_ENV
883 int ownslock; /* pid of owner of excl lock, else 0 - defect 3083 */
884 #endif
885 #ifdef AFS_DARWIN80_ENV
886 lck_mtx_t *rwlock;
887 #elif defined(AFS_DARWIN_ENV)
888 struct lock__bsd__ rwlock;
889 #endif
890 #ifdef AFS_XBSD_ENV
891 #if !defined(AFS_DFBSD_ENV) && !defined(AFS_NBSD_ENV)
892 struct lock rwlock;
893 #endif
894 #endif
895
896 union {
897 char *silly_name; /* For sillyrenamed regular files, the silly
898 * name the file was renamed to. */
899 struct VenusFid *target_root; /* For mountpoints, the fid of the root dir
900 * in the target volume. */
901 struct VenusFid *parent; /* For root dir vcaches, the fid of the
902 * parent dir. */
903 } mvid;
904
905 char *linkData; /* Link data if a symlink. */
906 afs_hyper_t flushDV; /* data version last flushed from text */
907 afs_hyper_t mapDV; /* data version last flushed from map */
908 struct server *callback; /* The callback host, if any */
909 afs_uint32 cbExpires; /* time the callback expires */
910 struct afs_q callsort; /* queue in expiry order, sort of */
911 struct axscache *Access; /* a list of cached access bits */
912 afs_int32 last_looker; /* pag/uid from last lookup here */
913 #if defined(AFS_SUN5_ENV)
914 afs_int32 activeV;
915 #endif /* defined(AFS_SUN5_ENV) */
916 struct SimpleLocks *slocks;
917 short opens; /* The numbers of opens, read or write, on this file. */
918 short execsOrWriters; /* The number of execs (if < 0) or writers (if > 0) of
919 * this file. */
920 short flockCount; /* count of flock readers, or -1 if writer */
921 char mvstat; /* see the AFS_MVSTAT_* constants */
922
923 char cachingStates; /* Caching policies for this file */
924 afs_uint32 cachingTransitions; /* # of times file has flopped between caching and not */
925
926 #if defined(AFS_LINUX24_ENV)
927 off_t next_seq_offset; /* Next sequential offset (used by prefetch/readahead) */
928 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI65_ENV)
929 off_t next_seq_blk_offset; /* accounted in blocks for Solaris & IRIX */
930 #endif
931
932 #if defined(AFS_SUN5_ENV)
933 afs_uint32 vstates; /* vstate bits */
934 #endif /* defined(AFS_SUN5_ENV) */
935 struct dcache *dchint;
936 struct dcache *dcreaddir; /* dcache for in-progress readdir */
937 unsigned int readdir_pid; /* pid of the thread in readdir */
938 #if defined(AFS_SGI_ENV)
939 daddr_t lastr; /* for read-ahead */
940 #ifdef AFS_SGI64_ENV
941 uint64_t vc_rwlockid; /* kthread owning rwlock */
942 #else
943 short vc_rwlockid; /* pid of process owning rwlock */
944 #endif
945 short vc_locktrips; /* # of rwlock reacquisitions */
946 sema_t vc_rwlock; /* vop_rwlock for afs */
947 pgno_t mapcnt; /* # of pages mapped */
948 struct cred *cred; /* last writer's cred */
949 #ifdef AFS_SGI64_ENV
950 struct bhv_desc vc_bhv_desc; /* vnode's behavior data. */
951 #endif
952 #endif /* AFS_SGI_ENV */
953 #if defined(AFS_LINUX26_ENV)
954 cred_t *cred; /* last writer's cred */
955 #endif
956 #ifdef AFS_LINUX24_ENV
957 struct dentry *target_link; /* dentry we prefer, when we are redirecting
958 * all requests due to duplicate dentry aliases.
959 * See LINUX/osi_vnodeops.c. Note that this is
960 * NOT an actual reference to a dentry, so this
961 * pointer MUST NOT be dereferenced on its own. */
962 #endif
963 afs_int32 vc_error; /* stash write error for this vnode. */
964 int xlatordv; /* Used by nfs xlator */
965 afs_ucred_t *uncred;
966 int asynchrony; /* num kbytes to store behind */
967 #ifdef AFS_SUN5_ENV
968 struct afs_q multiPage; /* list of multiPage_range structs */
969 #endif
970 int protocol; /* RX_FILESERVER, RX_OSD, ... defined in afsint.xg */
971 #if !defined(UKERNEL)
972 void *vpacRock; /* used to read or write in visible partitions */
973 #endif
974 afs_uint32 lastBRLWarnTime; /* last time we warned about byte-range locks */
975 #ifdef AFS_LINUX26_ENV
976 spinlock_t pagewriter_lock;
977 struct list_head pagewriters; /* threads that are writing vm pages */
978 #endif
979 };
980
981 #ifdef AFS_LINUX26_ENV
982 struct pagewriter {
983 struct list_head link;
984 pid_t writer;
985 };
986 #endif
987
988 #define DONT_CHECK_MODE_BITS 0
989 #define CHECK_MODE_BITS 1
990 #define CMB_ALLOW_EXEC_AS_READ 2 /* For the NFS xlator */
991
992 #if defined(AFS_SGI_ENV)
993 #define AVCRWLOCK(avc) (valusema(&(avc)->vc_rwlock) <= 0)
994
995 /* SGI vnode rwlock macros and flags. */
996 #ifndef AFS_SGI62_ENV
997 /* The following are defined here. SGI 6.2 declares them in vnode.h */
998 #define VRWLOCK_READ 0
999 #define VRWLOCK_WRITE 1
1000 #define VRWLOCK_WRITE_DIRECT 2
1001 #endif
1002
1003 #ifdef AFS_SGI53_ENV
1004 #ifdef AFS_SGI62_ENV
1005 #define AFS_RWLOCK_T vrwlock_t
1006 #else
1007 #define AFS_RWLOCK_T int
1008 #endif /* AFS_SGI62_ENV */
1009 #ifdef AFS_SGI64_ENV
1010 #include <ksys/behavior.h>
1011 #define AFS_RWLOCK(V,F) \
1012 afs_rwlock(&VTOAFS(V)->vc_bhv_desc, (F));
1013 #define AFS_RWUNLOCK(V,F) \
1014 afs_rwunlock(&VTOAFS(V)->vc_bhv_desc, (F));
1015
1016 #else
1017 #define AFS_RWLOCK(V,F) afs_rwlock((vnode_t *)(V), (F) )
1018 #define AFS_RWUNLOCK(V,F) afs_rwunlock((vnode_t *)(V), (F) )
1019 #endif
1020 #else /* AFS_SGI53_ENV */
1021 #define AFS_RWLOCK(V,F) afs_rwlock((V))
1022 #define AFS_RWUNLOCK(V,F) afs_rwunlock((V))
1023 #endif /* AFS_SGI53_ENV */
1024 #endif /* AFS_SGI_ENV */
1025
1026 struct vcxstat {
1027 struct VenusFid fid;
1028 afs_hyper_t DataVersion;
1029 afs_rwlock_t lock;
1030 afs_int32 parentVnode;
1031 afs_int32 parentUnique;
1032 afs_hyper_t flushDV;
1033 afs_hyper_t mapDV;
1034 afs_int32 truncPos;
1035 afs_int32 randomUid[CPSIZE];
1036 afs_int32 callback; /* Now a pointer to 'server' struct */
1037 afs_int32 cbExpires;
1038 afs_int32 randomAccess[CPSIZE];
1039 afs_int32 anyAccess;
1040 short opens;
1041 short execsOrWriters;
1042 short flockCount;
1043 char mvstat;
1044 afs_uint32 states;
1045 };
1046
1047 struct vcxstat2 {
1048 afs_int32 callerAccess;
1049 afs_int32 cbExpires;
1050 afs_int32 anyAccess;
1051 char mvstat;
1052 };
1053
1054 struct sbstruct {
1055 int sb_thisfile;
1056 int sb_default;
1057 };
1058
1059 /* CM inititialization parameters. What CM actually used after calculations
1060 * based on passed in arguments.
1061 */
1062 #define CMI_VERSION 1 /* increment when adding new fields. */
1063 struct cm_initparams {
1064 int cmi_version;
1065 int cmi_nChunkFiles;
1066 int cmi_nStatCaches;
1067 int cmi_nDataCaches;
1068 int cmi_nVolumeCaches;
1069 int cmi_firstChunkSize;
1070 int cmi_otherChunkSize;
1071 int cmi_cacheSize; /* The original cache size, in 1K blocks. */
1072 unsigned cmi_setTime:1;
1073 unsigned cmi_memCache:1;
1074 int spare[16 - 9]; /* size of struct is 16 * 4 = 64 bytes */
1075 };
1076
1077
1078 /*----------------------------------------------------------------------
1079 * AFS Data cache definitions
1080 *
1081 * Each entry describes a Unix file on the local disk that is
1082 * is serving as a cached copy of all or part of a Vice file.
1083 * Entries live in circular queues for each hash table slot
1084 *
1085 * Which queue is this thing in? Good question.
1086 * A struct dcache entry is in the freeDSlot queue when not associated with a cache slot (file).
1087 * Otherwise, it is in the DLRU queue. The freeDSlot queue uses the lruq.next field as
1088 * its "next" pointer.
1089 *
1090 * Cache entries in the DLRU queue are either associated with vice files, in which case
1091 * they are hashed by afs_dvnextTbl and afs_dcnextTbl pointers, or they are in the freeDCList
1092 * and are not associated with any vice file. This last list uses the afs_dvnextTbl pointer for
1093 * its "next" pointer.
1094 *----------------------------------------------------------------------*/
1095
1096 #define NULLIDX (-1) /* null index definition */
1097 /* struct dcache states bits */
1098 #define DRO 1
1099 #define DBackup 2
1100 #define DRW 4
1101 #define DWriting 8 /* file being written (used for cache validation) */
1102
1103 /* dcache data flags */
1104 #define DFEntryMod 0x02 /* has entry itself been modified? */
1105 #define DFFetching 0x04 /* file is currently being fetched */
1106
1107 /* dcache meta flags */
1108 #define DFNextStarted 0x01 /* next chunk has been prefetched already */
1109 #define DFFetchReq 0x10 /* someone is waiting for DFFetching to go on */
1110
1111
1112 /* flags in afs_indexFlags array */
1113 #define IFEverUsed 1 /* index entry has >= 1 byte of data */
1114 #define IFFree 2 /* index entry in freeDCList */
1115 #define IFDataMod 4 /* file needs to be written out */
1116 #define IFFlag 8 /* utility flag */
1117 #define IFDirtyPages 16 /* Solaris-only. contains dirty pages */
1118 #define IFAnyPages 32
1119 #define IFDiscarded 64 /* index entry in discardDCList */
1120
1121 #ifdef AFS_DARWIN100_ENV
1122 typedef user_addr_t iparmtype; /* 64 bit */
1123 typedef user_addr_t uparmtype; /* 64 bit */
1124 #else
1125 typedef char * uparmtype;
1126 #ifdef AFS_SGI65_ENV
1127 typedef afs_uint32 iparmtype;
1128 #else
1129 typedef long iparmtype;
1130 #endif
1131 #endif
1132
1133 #if SIZEOF_VOID_P == SIZEOF_UNSIGNED_INT
1134 # define uintptrsz unsigned int
1135 #elif SIZEOF_VOID_P == SIZEOF_UNSIGNED_LONG
1136 # define uintptrsz unsigned long
1137 #elif SIZEOF_VOID_P == SIZEOF_UNSIGNED_LONG_LONG
1138 # define uintptrsz unsigned long long
1139 #else
1140 # error "Unable to determine casting for pointers"
1141 #endif
1142
1143 struct afs_ioctl {
1144 uparmtype in; /* input buffer */
1145 uparmtype out; /* output buffer */
1146 short in_size; /* Size of input buffer <= 2K */
1147 short out_size; /* Maximum size of output buffer, <= 2K */
1148 };
1149
1150 /*
1151 * This version of afs_ioctl is required to pass in 32 bit user space
1152 * pointers into a 64 bit kernel.
1153 */
1154
1155 struct afs_ioctl32 {
1156 unsigned int in;
1157 unsigned int out;
1158 short in_size;
1159 short out_size;
1160 };
1161
1162
1163 /* CacheItems file has a header of type struct afs_fheader
1164 * (keep aligned properly). Since we already have sgi_62 clients running
1165 * with a 32 bit inode, a change is required to the header so that
1166 * they can distinguish the old 32 bit inode CacheItems file and zap it
1167 * instead of using it.
1168 */
1169 struct afs_fheader {
1170 #define AFS_FHMAGIC 0x7635abaf /* uses version number */
1171 afs_int32 magic;
1172 #define AFS_CI_VERSION 4
1173 afs_int32 version;
1174 afs_uint32 dataSize;
1175 afs_int32 firstCSize;
1176 afs_int32 otherCSize;
1177 };
1178
1179 #if defined(AFS_CACHE_VNODE_PATH)
1180 typedef char *afs_ufs_dcache_id_t;
1181 #elif defined(AFS_SGI61_ENV) || defined(AFS_SUN5_64BIT_ENV)
1182 /* Using ino64_t here so that user level debugging programs compile
1183 * the size correctly.
1184 */
1185 typedef ino64_t afs_ufs_dcache_id_t;
1186 #elif defined(AFS_LINUX26_ENV)
1187 #define MAX_FH_LEN 10
1188 typedef union {
1189 #if defined(NEW_EXPORT_OPS)
1190 struct fid fh;
1191 #endif
1192 __u32 raw[MAX_FH_LEN];
1193 } afs_ufs_dcache_id_t;
1194 extern int cache_fh_type;
1195 extern int cache_fh_len;
1196 #elif defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_S390X_LINUX24_ENV)
1197 typedef long afs_ufs_dcache_id_t;
1198 #elif defined(AFS_AIX51_ENV) || defined(AFS_HPUX1123_ENV)
1199 typedef ino_t afs_ufs_dcache_id_t;
1200 #else
1201 typedef afs_int32 afs_ufs_dcache_id_t;
1202 #endif
1203
1204 typedef afs_int32 afs_mem_dcache_id_t;
1205
1206 typedef union {
1207 afs_ufs_dcache_id_t ufs;
1208 afs_mem_dcache_id_t mem;
1209 } afs_dcache_id_t;
1210
1211 /* it does not compile outside kernel */
1212 struct buffer {
1213 afs_int32 fid; /* is adc->index, the cache file number */
1214 afs_dcache_id_t inode; /* is adc->f.inode, the inode number of the cac\
1215 he file */
1216 afs_int32 page;
1217 afs_int32 accesstime;
1218 struct buffer *hashNext;
1219 char *data;
1220 char lockers;
1221 char dirty;
1222 char hashIndex;
1223 afs_rwlock_t lock; /* the lock for this structure */
1224 };
1225
1226 /* kept on disk and in dcache entries */
1227 struct fcache {
1228 struct VenusFid fid; /* Fid for this file */
1229 afs_int32 modTime; /* last time this entry was modified */
1230 afs_hyper_t versionNo; /* Associated data version number */
1231 afs_int32 chunk; /* Relative chunk number */
1232 afs_dcache_id_t inode; /* Unix inode for this chunk */
1233 afs_int32 chunkBytes; /* Num bytes in this chunk */
1234 char states; /* Has this chunk been modified? */
1235 };
1236
1237 /* magic numbers to specify the cache type */
1238
1239 #define AFS_FCACHE_TYPE_UFS 0x0
1240 #define AFS_FCACHE_TYPE_MEM 0x1
1241 #define AFS_FCACHE_TYPE_NFS 0x2
1242 #define AFS_FCACHE_TYPE_EPI 0x3
1243
1244 /* kept in memory */
1245 struct dcache {
1246 struct afs_q lruq; /* Free queue for in-memory images */
1247 struct afs_q dirty; /* Queue of dirty entries that need written */
1248 afs_rwlock_t lock; /* Protects validPos, some f */
1249 afs_rwlock_t tlock; /* Atomizes updates to refCount */
1250 afs_rwlock_t mflock; /* Atomizes accesses/updates to mflags */
1251 afs_size_t validPos; /* number of valid bytes during fetch */
1252 afs_int32 index; /* The index in the CacheInfo file */
1253 short refCount; /* Associated reference count. */
1254 char dflags; /* Data flags */
1255 char mflags; /* Meta flags */
1256 struct fcache f; /* disk image */
1257 afs_int32 bucket; /* which bucket these dcache entries are in */
1258 /*
1259 * Locking rules:
1260 *
1261 * dcache.lock protects the actual contents of the cache file (in
1262 * f.inode), subfields of f except those noted below, dflags and
1263 * validPos.
1264 *
1265 * dcache.tlock is used to make atomic updates to refCount. Zero
1266 * refCount dcache entries are protected by afs_xdcache instead of
1267 * tlock.
1268 *
1269 * dcache.mflock is used to access and update mflags. It cannot be
1270 * held without holding the corresponding dcache.lock. Updating
1271 * mflags requires holding dcache.lock(R) and dcache.mflock(W), and
1272 * checking for mflags requires dcache.lock(R) and dcache.mflock(R).
1273 * Note that dcache.lock(W) gives you the right to update mflags,
1274 * as dcache.mflock(W) can only be held with dcache.lock(R).
1275 *
1276 * dcache.index, dcache.f.fid, dcache.f.chunk and dcache.f.inode are
1277 * write-protected by afs_xdcache and read-protected by refCount.
1278 * Once an entry is referenced, these values cannot change, and if
1279 * it's on the free list (with refCount=0), it can be reused for a
1280 * different file/chunk. These values can only be written while
1281 * holding afs_xdcache(W) and allocating this dcache entry (thereby
1282 * ensuring noone else has a refCount on it).
1283 */
1284 };
1285
1286 /* afs_memcache.c */
1287 struct memCacheEntry {
1288 int size; /* # of valid bytes in this entry */
1289 int dataSize; /* size of allocated data area */
1290 afs_lock_t afs_memLock;
1291 char *data; /* bytes */
1292 };
1293
1294 struct afs_FetchOutput {
1295 struct AFSVolSync tsync;
1296 struct AFSFetchStatus OutStatus;
1297 struct AFSCallBack CallBack;
1298 };
1299
1300 /* macro to mark a dcache entry as bad */
1301 #define ZapDCE(x) \
1302 do { \
1303 (x)->f.fid.Fid.Unique = 0; \
1304 afs_indexUnique[(x)->index] = 0; \
1305 (x)->dflags |= DFEntryMod; \
1306 } while(0)
1307
1308 /* FakeOpen and Fake Close used to be real subroutines. They're only used in
1309 * sun_subr and afs_vnodeops, and they're very frequently called, so I made
1310 * them into macros. They do:
1311 * FakeOpen: fake the file being open for writing. avc->lock must be held
1312 * in write mode. Having the file open for writing is like having a DFS
1313 * write-token: you're known to have the best version of the data around,
1314 * and so the CM won't let it be overwritten by random server info.
1315 * FakeClose: undo the effects of FakeOpen, noting that we want to ensure
1316 * that a real close eventually gets done. We use CCore to achieve this if
1317 * we would end up closing the file. avc->lock must be held in write mode */
1318
1319 #ifdef AFS_AIX_IAUTH_ENV
1320 #define CRKEEP(V, C) (V)->linkData = (char*)crdup((C))
1321 #else
1322 #define CRKEEP(V, C) crhold((C)); (V)->linkData = (char*)(C)
1323 #endif
1324
1325 #define afs_FakeOpen(avc) { avc->opens++; avc->execsOrWriters++; }
1326 #define afs_FakeClose(avc, acred) \
1327 { if (avc->execsOrWriters == 1) { \
1328 /* we're the last writer, just use CCore flag */ \
1329 avc->f.states |= CCore; /* causes close to be called later */ \
1330 \
1331 /* The cred and vnode holds will be released in afs_FlushActiveVcaches */ \
1332 AFS_FAST_HOLD(avc); /* So it won't disappear */ \
1333 CRKEEP(avc, acred); /* Should use a better place for the creds */ \
1334 } \
1335 else { \
1336 /* we're not the last writer, let the last one do the store-back for us */ \
1337 avc->opens--; \
1338 avc->execsOrWriters--; \
1339 } \
1340 }
1341
1342 #define AFS_ZEROS 64 /* zero buffer */
1343
1344 /*#define afs_DirtyPages(avc) (((avc)->f.states & CDirty) || osi_VMDirty_p((avc)))*/
1345 #define afs_DirtyPages(avc) ((avc)->f.states & CDirty)
1346
1347 #define afs_InReadDir(avc) (((avc)->f.states & CReadDir) && (avc)->readdir_pid == MyPidxx2Pid(MyPidxx))
1348
1349 extern struct dcache **afs_indexTable; /*Pointers to in-memory dcache entries */
1350 extern afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
1351 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
1352 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
1353 extern afs_int32 afs_cacheFiles; /*Size of afs_indexTable */
1354 extern afs_int32 afs_cacheBlocks; /*1K blocks in cache */
1355 extern afs_int32 afs_cacheStats; /*Stat entries in cache */
1356 extern struct vcache *afs_vhashT[VCSIZE]; /*Stat cache hash table */
1357 extern struct afs_q afs_vhashTV[VCSIZE]; /* cache hash table on volume */
1358 extern afs_int32 afs_initState; /*Initialization state */
1359 extern afs_int32 afs_termState; /* Termination state */
1360 extern struct VenusFid afs_rootFid; /*Root for whole file system */
1361 extern afs_int32 afs_allCBs; /* Count of callbacks */
1362 extern afs_int32 afs_oddCBs; /* Count of odd callbacks */
1363 extern afs_int32 afs_evenCBs; /* Count of even callbacks */
1364 extern afs_int32 afs_allZaps; /* Count of fid deletes */
1365 extern afs_int32 afs_oddZaps; /* Count of odd fid deletes */
1366 extern afs_int32 afs_evenZaps; /* Count of even fid deletes */
1367 extern struct brequest afs_brs[NBRS]; /* request structures */
1368
1369 #define UHash(auid) ((auid) & (NUSERS-1))
1370 #define VHash(avol) ((avol)&(NVOLS-1))
1371 #define SHash(aserv) ((ntohl(aserv)) & (NSERVERS-1))
1372 #define FVHash(acell,avol) (((avol)+(acell)) & (NFENTRIES-1))
1373
1374 /* Performance hack - we could replace VerifyVCache2 with the appropriate
1375 * GetVCache incantation, and could eliminate even this code from afs_UFSRead
1376 * by making intentionally invalidating quick.stamp in the various callbacks
1377 * expiration/breaking code */
1378 #ifdef AFS_DARWIN_ENV
1379 #define afs_VerifyVCache(avc, areq) \
1380 (((avc)->f.states & CStatd) ? (osi_VM_Setup(avc, 0), 0) : \
1381 afs_VerifyVCache2((avc),areq))
1382 #else
1383 #define afs_VerifyVCache(avc, areq) \
1384 (((avc)->f.states & CStatd) ? 0 : afs_VerifyVCache2((avc),areq))
1385 #endif
1386
1387 #define DO_STATS 1 /* bits used by FindVCache */
1388 #define DO_VLRU 2
1389 #define IS_SLOCK 4
1390 #define IS_WLOCK 8
1391
1392 /* values for adown value of afs_LoopServers */
1393 #define AFS_LS_UP 0
1394 #define AFS_LS_DOWN 1
1395 #define AFS_LS_ALL 2
1396
1397 /* values for flag param of afs_CheckVolumeNames */
1398 #define AFS_VOLCHECK_EXPIRED 0x1 /* volumes whose callbacks have expired */
1399 #define AFS_VOLCHECK_BUSY 0x2 /* volumes which were marked busy */
1400 #define AFS_VOLCHECK_MTPTS 0x4 /* mount point invalidation also */
1401 #define AFS_VOLCHECK_FORCE 0x8 /* do all forcibly */
1402
1403 #endif /* KERNEL */
1404
1405 #define AFS_FSPORT ((unsigned short) htons(7000))
1406 #define AFS_VLPORT ((unsigned short) htons(7003))
1407 #define AFS_RXOSDPORT ((unsigned short) htons(7011))
1408
1409 #define afs_rdwr(avc, uio, rw, io, cred) \
1410 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 0) : afs_read(avc, uio, cred, 0))
1411 #define afs_nlrdwr(avc, uio, rw, io, cred) \
1412 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 1) : afs_read(avc, uio, cred, 1))
1413
1414 /* Cache size truncation uses the following low and high water marks:
1415 * If the cache is more than 90% full by space (CM_DCACHESPACEFREEPCT) or
1416 * 95% full by # of chunks (CM_DCACHECOUNTFREEPCT), the cache truncation
1417 * daemon is awakened and will start freeing space. The cache truncation
1418 * daemon will continue to free space until the cache is at most 85% full
1419 * by space (CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT). The cache truncation
1420 * daemon will also try to free space until the cache is at most 90% full by
1421 * chunks (CM_DCACHECOUNTFREEPCT - CM_DCACHEEXTRAPCT), but the 85% space limit
1422 * is the only limit that we must hit.
1423 * afs_UFSWrite and afs_GetDCache (when it needs to fetch data) will wait on
1424 * afs_WaitForCacheDrain if the cache is 98% (CM_WAITFORDRAINPCT) full.
1425 * afs_GetDownD wakes those processes once the cache is 95% full
1426 * (CM_CACHESIZEDRAINEDPCT).
1427 */
1428 #define CM_MAXDISCARDEDCHUNKS 16 /* # of chunks */
1429 #define CM_DCACHECOUNTFREEPCT 95 /* max pct of chunks in use */
1430 #define CM_DCACHESPACEFREEPCT 90 /* max pct of space in use */
1431 #define CM_DCACHEEXTRAPCT 5 /* extra to get when freeing */
1432 #define CM_CACHESIZEDRAINEDPCT 95 /* wakeup processes when down to here. */
1433 #define CM_WAITFORDRAINPCT 98 /* sleep if cache is this full. */
1434
1435 /* when afs_cacheBlocks is large, settle for slightly decreased precision */
1436 #define PERCENT(p, v) \
1437 ((afs_cacheBlocks & 0xffe00000) ? ((v) / 100 * (p)) : ((p) * (v) / 100))
1438
1439 #define afs_CacheIsTooFull() \
1440 (afs_blocksUsed - afs_blocksDiscarded > \
1441 PERCENT(CM_DCACHESPACEFREEPCT, afs_cacheBlocks) || \
1442 afs_freeDCCount - afs_discardDCCount < \
1443 PERCENT(100 - CM_DCACHECOUNTFREEPCT, afs_cacheFiles))
1444
1445 /* Handy max length of a numeric string. */
1446 #define CVBS 12 /* max afs_int32 is 2^32 ~ 4*10^9, +1 for NULL, +luck */
1447
1448 #define refpanic(foo) if (afs_norefpanic) \
1449 { printf( foo ); afs_norefpanic++;} else osi_Panic( foo )
1450
1451 /*
1452 ** these are defined in the AIX source code sys/fs_locks.h but are not
1453 ** defined anywhere in the /usr/include directory
1454 */
1455 #if defined(AFS_AIX41_ENV)
1456 #define VN_LOCK(vp) simple_lock(&(vp)->v_lock)
1457 #define VN_UNLOCK(vp) simple_unlock(&(vp)->v_lock)
1458 #endif
1459
1460 /* get a file's serial number from a vnode */
1461 #ifndef afs_vnodeToInumber
1462 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1463 #define afs_vnodeToInumber(V) VnodeToIno(V)
1464 #else
1465 #define afs_vnodeToInumber(V) (VTOI(V)->i_number)
1466 #endif /* AFS_SGI62_ENV */
1467 #endif
1468
1469 /* get a file's device number from a vnode */
1470 #ifndef afs_vnodeToDev
1471 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1472 #define afs_vnodeToDev(V) VnodeToDev(V)
1473 #elif defined(UKERNEL)
1474 #define afs_vnodeToDev(V) (VTOI(V) ? (VTOI(V)->i_dev) : (-1))
1475 #else
1476 #define afs_vnodeToDev(V) (VTOI(V)->i_dev)
1477 #endif
1478 #endif
1479
1480 /* declare something so that prototypes don't flip out */
1481 /* appears struct buf stuff is only actually passed around as a pointer,
1482 except with libuafs, in which case it is actually defined */
1483
1484 struct buf;
1485
1486 struct rxfs_storeVariables {
1487 struct rx_call *call;
1488 struct vcache *vcache;
1489 char *tbuffer;
1490 struct iovec *tiov;
1491 afs_int32 tnio;
1492 afs_int32 hasNo64bit;
1493 struct AFSStoreStatus InStatus;
1494 };
1495
1496 struct storeOps {
1497 int (*prepare)(void *rock, afs_uint32 size, afs_uint32 *bytestoxfer);
1498 int (*read)(void *rock, struct osi_file *tfile, afs_uint32 offset,
1499 afs_uint32 tlen, afs_uint32 *bytesread);
1500 int (*write)(void *rock, afs_uint32 tlen, afs_uint32 *byteswritten);
1501 int (*status)(void *rock);
1502 int (*padd)(void *rock, afs_uint32 tlen);
1503 int (*close)(void *rock, struct AFSFetchStatus *OutStatus,
1504 afs_int32 *doProcessFS);
1505 int (*destroy)(void **rock, afs_int32 error);
1506 int (*storeproc)(struct storeOps *, void *, struct dcache *, int *,
1507 afs_size_t *);
1508 };
1509
1510 struct fetchOps {
1511 int (*more)(void *rock, afs_int32 *length, afs_uint32 *moredata);
1512 int (*read)(void *rock, afs_uint32 tlen, afs_uint32 *bytesread);
1513 int (*write)(void *rock, struct osi_file *fp, afs_uint32 offset,
1514 afs_uint32 tlen, afs_uint32 *byteswritten);
1515 int (*close)(void *rock, struct vcache *avc, struct dcache *adc,
1516 struct afs_FetchOutput *Outputs);
1517 int (*destroy)(void **rock, afs_int32 error);
1518 };
1519
1520 /* fakestat support: opaque storage for afs_EvalFakeStat to remember
1521 * what vcache should be released.
1522 */
1523 struct afs_fakestat_state {
1524 char valid;
1525 char did_eval;
1526 char need_release;
1527 struct vcache *root_vp;
1528 };
1529
1530 extern int afs_fakestat_enable;
1531 extern int afs_rmtsys_enable;
1532 extern int afsd_dynamic_vcaches;
1533
1534 /*
1535 * Wrappers for access to credentials structure members
1536 * Linux uses the kernel cred structure if available, with the
1537 * wrappers defined in LINUX/osi_machdep.h
1538 */
1539 #if defined(AFS_NBSD40_ENV)
1540 /* in osi_machdep.h as expected */
1541 #elif defined (AFS_DARWIN110_ENV)
1542 #define afs_cr_uid(cred) kauth_cred_getuid((kauth_cred_t)(cred))
1543 #define afs_cr_gid(cred) kauth_cred_getgid((kauth_cred_t)(cred))
1544 #elif !(defined(AFS_LINUX26_ENV) && defined(STRUCT_TASK_STRUCT_HAS_CRED))
1545 #define afs_cr_uid(cred) ((cred)->cr_uid)
1546 #define afs_cr_gid(cred) ((cred)->cr_gid)
1547 #if !defined(AFS_OBSD_ENV)
1548 #define afs_cr_ruid(cred) ((cred)->cr_ruid)
1549 #define afs_cr_rgid(cred) ((cred)->cr_rgid)
1550 #endif
1551
1552 #if !defined(AFS_DARWIN110_ENV)
1553 static_inline void
1554 afs_set_cr_uid(afs_ucred_t *cred, uid_t uid) {
1555 cred->cr_uid = uid;
1556 }
1557 static_inline void
1558 afs_set_cr_gid(afs_ucred_t *cred, gid_t gid) {
1559 cred->cr_gid = gid;
1560 }
1561 #if !defined(AFS_OBSD_ENV)
1562 static_inline void
1563 afs_set_cr_ruid(afs_ucred_t *cred, uid_t uid) {
1564 cred->cr_ruid = uid;
1565 }
1566 static_inline void
1567 afs_set_cr_rgid(afs_ucred_t *cred, gid_t gid) {
1568 cred->cr_rgid = gid;
1569 }
1570 #endif /* ! AFS_OBSD_ENV */
1571 #endif /* ! AFS_DARWIN110_ENV */
1572 #endif
1573
1574 #ifdef AFS_SUN5_ENV
1575
1576 /** The 32 bit OS expects the members of this structure to be 32 bit
1577 * quantities and the 64 bit OS expects them as 64 bit quanties. Hence
1578 * to accomodate both, *long* is used instead of afs_int32
1579 */
1580
1581 struct afssysa {
1582 long syscall;
1583 long parm1;
1584 long parm2;
1585 long parm3;
1586 long parm4;
1587 long parm5;
1588 long parm6;
1589 };
1590 extern int Afs_syscall(struct afssysa *uap, rval_t *rvp);
1591 #endif /* AFS_SUN5_ENV */
1592
1593 /*
1594 * Various definitions for osi_sleep and its event hash table
1595 * DFBSD and SUNOS have no osi_sleep, and HPUX has its own hack for this stuff
1596 */
1597 #define AFS_EVHASHSIZE 128 /* size of afs_evhasht, must be power of 2 */
1598
1599 typedef struct afs_event {
1600 struct afs_event *next; /* next in hash chain */
1601 char *event; /* lwp event: an address */
1602 int refcount; /* Is it in use? */
1603 int seq; /* Sequence number: this is incremented
1604 * by wakeup calls; wait will not return until
1605 * it changes */
1606 #if defined(AFS_AIX_ENV)
1607 tid_t cond;
1608 #elif defined(AFS_DARWIN_ENV)
1609 # ifdef AFS_DARWIN80_ENV
1610 lck_mtx_t *lck;
1611 thread_t owner;
1612 # endif
1613 /* no cond member */
1614 #elif defined(AFS_FBSD_ENV) || defined(AFS_OBSD_ENV)
1615 int cond; /* "all this gluck should probably be replaced by CVs" */
1616 #elif defined(AFS_LINUX24_ENV)
1617 wait_queue_head_t cond;
1618 #elif defined(AFS_NBSD_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
1619 kcondvar_t cond; /* Currently associated condition variable */
1620 #endif
1621 } afs_event_t;
1622
1623 extern afs_event_t *afs_evhasht[AFS_EVHASHSIZE]; /* Hash table for events */
1624
1625 #endif /* _AFS_H_ */