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
13 * AFS system call opcodes
16 #include <afs/afs_args.h>
18 #include "afs/afs_args.h"
22 /* Upper bound on number of iovecs out uio routines will deal with. */
23 #define AFS_MAXIOVCNT 16
26 extern int afs_shuttingdown;
29 * Macros to uniquely identify the AFS vfs struct
31 #define AFS_VFSMAGIC 0x1234
32 #if defined(AFS_SUN5_ENV) || defined(AFS_HPUX90_ENV) || defined(AFS_LINUX20_ENV)
33 #define AFS_VFSFSID 99
35 #if defined(AFS_SGI_ENV)
36 #define AFS_VFSFSID afs_fstype
38 #define AFS_VFSFSID AFS_MOUNT_AFS
42 /* Moved from VNOPS/afs_vnop_flocks so can be used in prototypes */
43 #if defined(AFS_HPUX102_ENV)
44 #define AFS_FLOCK k_flock
46 #if defined(AFS_SUN56_ENV) || (defined(AFS_LINUX24_ENV) && !(defined(AFS_LINUX26_ENV) && defined(AFS_LINUX_64BIT_KERNEL)))
47 #define AFS_FLOCK flock64
49 #define AFS_FLOCK flock
50 #endif /* AFS_SUN65_ENV */
51 #endif /* AFS_HPUX102_ENV */
53 /* The following are various levels of afs debugging */
54 #define AFSDEB_GENERAL 1 /* Standard debugging */
55 #define AFSDEB_NETWORK 2 /* low level afs networking */
56 #define AFSDEB_RX 4 /* RX debugging */
57 #define AFSDEB_VNLAYER 8 /* interface layer to AFS (aixops, gfsops, etc) */
59 /* generic undefined vice id */
62 /* The basic defines for the Andrew file system
63 better keep things powers of two so "& (foo-1)" hack works for masking bits */
64 #define MAXHOSTS 13 /* max hosts per single volume */
65 #define OMAXHOSTS 8 /* backwards compatibility */
66 #define MAXCELLHOSTS 8 /* max vldb servers per cell */
67 #define NBRS 15 /* max number of queued daemon requests */
68 #define NUSERS 16 /* hash table size for unixuser table */
69 #define NSERVERS 16 /* hash table size for server table */
70 #define NVOLS 64 /* hash table size for volume table */
71 #define NFENTRIES 256 /* hash table size for disk volume table */
72 #define VCSIZE 1024 /* stat cache hash table size */
73 #define DCSIZE 512 /* disk cache hash table size */
74 #define CBRSIZE 512 /* call back returns hash table size */
75 #define PIGGYSIZE 1350 /* max piggyback size */
76 #define MAXVOLS 128 /* max vols we can store */
77 #define MAXSYSNAME 128 /* max sysname (i.e. @sys) size */
78 #define MAXNUMSYSNAMES 16 /* max that current constants allow */
79 #define NOTOKTIMEOUT (2*3600) /* time after which to timeout conns sans tokens */
80 #define NOPAG 0xffffffff
81 #define AFS_NCBRS 300 /* max # of call back return entries */
82 #define AFS_MAXCBRSCALL 16 /* max to return in a given call */
83 #define AFS_SALLOC_LOW_WATER 250 /* Min free blocks before allocating more */
84 #define AFS_LRALLOCSIZ 4096 /* "Large" allocated size */
86 #define AFS_NRXPACKETS 80
87 #define AFS_RXDEADTIME 50
88 #define AFS_HARDDEADTIME 120
89 #define AFS_IDLEDEADTIME 50
90 #define AFS_BLKBITS 12
91 #define AFS_BLKSIZE (1 << AFS_BLKBITS)
93 extern afs_int32 afs_rx_deadtime;
94 extern afs_int32 afs_rx_harddead;
95 extern afs_int32 afs_rx_idledead;
100 char index, allocked;
103 /* flags to use with AFSOP_CACHEINIT */
104 #define AFSCALL_INIT_MEMCACHE 0x1 /* use a memory-based cache */
106 /* below here used only for kernel procedures */
108 /* Store synchrony flags - SYNC means that data should be forced to server's
109 * disk immediately upon completion. */
112 #define AFS_VMSYNC_INVAL 2 /* sync and invalidate pages */
113 #define AFS_LASTSTORE 4
116 /* background request structure */
119 #define BOP_NOOP 0 /* leave 0 unused */
120 #define BOP_FETCH 1 /* parm1 is chunk to get */
121 #define BOP_STORE 2 /* parm1 is chunk to store */
122 #define BOP_PATH 3 /* parm1 is path, parm2 is chunk to fetch */
124 #if defined(AFS_CACHE_BYPASS)
125 #define BOP_FETCH_NOCACHE 4 /* parms are: vnode ptr, offset, segment ptr, addr, cred ptr */
128 #define B_DONTWAIT 1 /* On failure return; don't wait */
130 /* protocol is: refCount is incremented by user to take block out of free pool.
131 Next, BSTARTED is set when daemon finds request. This prevents
132 other daemons from picking up the same request. Finally, when
133 request is done, refCount is zeroed. BDONE and BWAIT are used by
134 dudes waiting for operation to proceed to a certain point before returning.
136 #define BSTARTED 1 /* request picked up by a daemon */
137 #define BUVALID 2 /* code is valid (store) */
138 #define BUWAIT 4 /* someone is waiting for BUVALID */
140 struct vcache *vc; /* vnode to use, with vrefcount bumped */
141 struct AFS_UCRED *cred; /* credentials to use for operation */
142 afs_size_t size_parm[BPARMS]; /* random parameters */
143 void *ptr_parm[BPARMS]; /* pointer parameters */
144 afs_int32 code; /* return code */
145 short refCount; /* use counter for this structure */
146 char opcode; /* what to do (store, fetch, etc) */
147 char flags; /* free, etc */
148 afs_int32 ts; /* counter "timestamp" */
156 afs_int32 AuthHandle;
157 char HandShakeKey[8];
159 afs_int32 BeginTimestamp;
160 afs_int32 EndTimestamp;
164 afs_int32 Cell; /* better sun packing if at end of structure */
168 /* 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!) */
171 afs_int32 CellAndUnique;
174 /* The actual number of bytes in the SmallFid, not the sizeof struct. */
175 #define SIZEOF_SMALLFID 10
179 * Queues implemented with both pointers and short offsets into a disk file.
187 afs_int32 uid; /* user id making the request */
188 afs_int32 busyCount; /* how many busies we've seen so far */
189 afs_int32 flags; /* things like O_SYNC, O_NONBLOCK go here */
190 char initd; /* if non-zero, Error fields meaningful */
191 char accessError; /* flags for overriding error return code */
192 char volumeError; /* encountered a missing or busy volume */
193 char networkError; /* encountered network problems */
194 char permWriteError; /* fileserver returns permenent error. */
195 char tokenError; /* a token error other than expired. */
196 char idleError; /* the server idled too long */
197 char skipserver[MAXHOSTS];
202 /* structure linked off of a server to keep track of queued returned
203 * callbacks. Sent asynchronously when we run a little low on free dudes.
206 struct afs_cbr **pprev;
207 struct afs_cbr *next;
209 struct afs_cbr **hash_pprev;
210 struct afs_cbr *hash_next;
215 /* cellinfo file magic number */
216 #define AFS_CELLINFO_MAGIC 0xf32817cd
219 #define CNoSUID 0x02 /* disable suid bit for this cell */
220 #define CLinkedCell4 0x04 /* reserved for ADDCELL2 pioctl */
221 #define CNoAFSDB 0x08 /* never bother trying AFSDB */
222 #define CHasVolRef 0x10 /* volumes were referenced */
223 #define CLinkedCell 0x20 /* has a linked cell in lcellp */
226 struct afs_q lruq; /* lru q next and prev */
227 char *cellName; /* char string name of cell */
228 afs_int32 cellIndex; /* sequence number */
229 afs_int32 cellNum; /* semi-permanent cell number */
230 struct server *cellHosts[MAXCELLHOSTS]; /* volume *location* hosts */
231 struct cell *lcellp; /* Associated linked cell */
232 u_short fsport; /* file server port */
233 u_short vlport; /* volume server port */
234 short states; /* state flags */
235 time_t timeout; /* data expire time, if non-zero */
236 struct cell_name *cnamep; /* pointer to our cell_name */
237 afs_rwlock_t lock; /* protects cell data */
238 unsigned char cellHandle[16]; /* deterministic handle for this cell */
242 struct cell_name *next;
249 struct cell_alias *next;
255 #define afs_PutCell(cellp, locktype)
257 /* the unixuser flag bit definitions */
258 #define UHasTokens 1 /* are the st and ct fields valid (ever set)? */
259 #define UTokensBad 2 /* are tokens bad? */
260 #define UPrimary 4 /* on iff primary identity */
261 #define UNeedsReset 8 /* needs afs_ResetAccessCache call done */
262 #define UPAGCounted 16 /* entry seen during PAG search (for stats) */
263 #define UNFSGetCreds 32 /* getting creds for NFS client */
264 /* A flag used by afs_GCPAGs to keep track of
265 * which entries in afs_users need to be deleted.
266 * The lifetime of its presence in the table is the
267 * lifetime of the afs_GCPAGs function.
269 #define TMP_UPAGNotReferenced 128
271 /* values for afs_gcpags */
272 enum { AFS_GCPAGS_NOTCOMPILED = 0, AFS_GCPAGS_OK =
273 1, AFS_GCPAGS_USERDISABLED, AFS_GCPAGS_EPROC0, AFS_GCPAGS_EPROCN,
274 AFS_GCPAGS_EEQPID, AFS_GCPAGS_EINEXACT, AFS_GCPAGS_EPROCEND,
275 AFS_GCPAGS_EPROCWALK, AFS_GCPAGS_ECREDWALK, AFS_GCPAGS_EPIDCHECK,
276 AFS_GCPAGS_ENICECHECK
279 extern afs_int32 afs_gcpags;
280 extern afs_int32 afs_gcpags_procsize;
281 extern afs_int32 afs_bkvolpref;
282 extern char afs_cachebasedir[1024];
283 extern afs_int32 afs_numcachefiles;
284 extern afs_int32 afs_numfilesperdir;
287 struct unixuser *next; /* next hash pointer */
288 afs_int32 uid; /* search based on uid and cell */
290 afs_int32 vid; /* corresponding vice id in specified cell */
291 short refCount; /* reference count for allocation */
292 char states; /* flag info */
293 afs_int32 tokenTime; /* last time tokens were set, used for timing out conn data */
294 afs_int32 stLen; /* ticket length (if kerberos, includes kvno at head) */
295 char *stp; /* pointer to ticket itself */
296 struct ClearToken ct;
297 struct afs_exporter *exporter; /* more info about the exporter for the remote user */
298 void *cellinfo; /* pointer to cell info (PAG manager only) */
302 /* Per-connection block. */
303 struct conn *next; /* Next dude same server. */
304 struct unixuser *user; /* user validated with respect to. */
305 struct rx_connection *id; /* RPC connid. */
306 struct srvAddr *srvr; /* server associated with this conn */
307 short refCount; /* reference count for allocation */
308 unsigned short port; /* port associated with this connection */
309 char forceConnectFS; /* Should we try again with these tokens? */
315 /* Fid comparison routines */
316 #define FidCmp(a,b) ((a)->Fid.Unique != (b)->Fid.Unique \
317 || (a)->Fid.Vnode != (b)->Fid.Vnode \
318 || (a)->Fid.Volume != (b)->Fid.Volume \
319 || (a)->Cell != (b)->Cell)
321 #define FidMatches(afid,tvc) ((tvc)->fid.Fid.Vnode == (afid)->Fid.Vnode && \
322 (tvc)->fid.Fid.Volume == (afid)->Fid.Volume && \
323 (tvc)->fid.Cell == (afid)->Cell && \
324 ( (tvc)->fid.Fid.Unique == (afid)->Fid.Unique || \
325 (!(afid)->Fid.Unique && ((tvc)->states & CUnique))))
329 * Operations on circular queues implemented with pointers. Note: these queue
330 * objects are always located at the beginning of the structures they are linking.
332 #define QInit(q) ((q)->prev = (q)->next = (q))
333 #define QAdd(q,e) ((e)->next = (q)->next, (e)->prev = (q), \
334 (q)->next->prev = (e), (q)->next = (e))
335 #define QRemove(e) ((e)->next->prev = (e)->prev, (e)->prev->next = (e)->next, (e)->prev = NULL, (e)->next = NULL)
336 #define QNext(e) ((e)->next)
337 #define QPrev(e) ((e)->prev)
338 #define QEmpty(q) ((q)->prev == (q))
339 /* this one takes q1 and sticks it on the end of q2 - that is, the other end, not the end
340 * that things are added onto. q1 shouldn't be empty, it's silly */
341 #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))
343 * Do lots of address arithmetic to go from vlruq to the base of the vcache
344 * structure. Don't move struct vnode, since we think of a struct vcache as
345 * a specialization of a struct vnode
347 #define QTOV(e) ((struct vcache *)(((char *) (e)) - (((char *)(&(((struct vcache *)(e))->vlruq))) - ((char *)(e)))))
348 #define QTOC(e) ((struct cell *)((char *) (e)))
349 #define QTOVH(e) ((struct vcache *)(((char *) (e)) - (((char *)(&(((struct vcache *)(e))->vhashq))) - ((char *)(e)))))
352 #define SRVADDR_ISDOWN 0x20 /* same as SRVR_ISDOWN */
353 #define SRVADDR_NOUSE 0x40 /* Don't use this srvAddr */
355 struct srvAddr *next_bkt; /* next item in hash bucket */
356 struct srvAddr *next_sa; /* another interface on same host */
357 struct server *server; /* back to parent */
358 struct conn *conns; /* All user connections to this server */
359 afs_int32 sa_ip; /* Host addr in network byte order */
360 u_short sa_iprank; /* indiv ip address priority */
361 u_short sa_portal; /* port addr in network byte order */
366 * Values used in the flags field of the server structure below.
368 * AFS_SERVER_FLAG_ACTIVATED Has the server ever had a user connection
369 * associated with it?
371 #define AFS_SERVER_FLAG_ACTIVATED 0x01
372 #define SNO_LHOSTS 0x04
373 #define SYES_LHOSTS 0x08
374 #define SVLSRV_UUID 0x10
375 #define SRVR_ISDOWN 0x20
376 #define SRVR_MULTIHOMED 0x40
377 #define SRVR_ISGONE 0x80
378 #define SNO_INLINEBULK 0x100
379 #define SNO_64BIT 0x200
381 #define afs_serverSetNo64Bit(s) ((s)->srvr->server->flags |= SNO_64BIT)
382 #define afs_serverHasNo64Bit(s) ((s)->srvr->server->flags & SNO_64BIT)
388 afs_int32 addr_uniquifier;
392 struct srvAddr haddr;
395 #define sr_uuid _suid._srvUuid.suuid
396 #define sr_addr_uniquifier _suid._srvUuid.addr_uniquifier
397 #define sr_host _suid._srvId.haddr.ip
398 #define sr_portal _suid._srvId.haddr.portal
399 #define sr_rank _suid._srvId.haddr.ip_rank
400 #define sr_flags _suid._srvId.haddr.flags
401 #define sr_conns _suid._srvId.haddr.conns
402 struct server *next; /* Ptr to next server in hash chain */
403 struct cell *cell; /* Cell in which this host resides */
404 struct afs_cbr *cbrs; /* Return list of callbacks */
405 afs_int32 activationTime; /* Time when this record was first activated */
406 afs_int32 lastDowntimeStart; /* Time when last downtime incident began */
407 afs_int32 numDowntimeIncidents; /* # (completed) downtime incidents */
408 afs_int32 sumOfDowntimes; /* Total downtime experienced, in seconds */
409 struct srvAddr *addr;
410 afs_uint32 flags; /* Misc flags */
413 #define afs_PutServer(servp, locktype)
415 /* structs for some pioctls - these are (or should be)
423 struct sprefrequest_33 {
424 unsigned short offset;
425 unsigned short num_servers;
429 struct sprefrequest { /* new struct for 3.4 */
430 unsigned short offset;
431 unsigned short num_servers;
432 unsigned short flags;
437 unsigned short next_offset;
438 unsigned short num_servers;
439 struct spref servers[1]; /* we overrun this array intentionally... */
443 unsigned short flags;
444 unsigned short num_servers;
445 struct spref servers[1]; /* we overrun this array intentionally... */
447 /* struct for GAG pioctl
450 afs_uint32 showflags, logflags, logwritethruflag, spare[3];
451 unsigned char spare2[128];
455 #define logwritethruON 1
458 afs_int32 rx_initReceiveWindow, rx_maxReceiveWindow, rx_initSendWindow,
459 rx_maxSendWindow, rxi_nSendFrags, rxi_nRecvFrags, rxi_OrphanFragSize;
460 afs_int32 rx_maxReceiveSize, rx_MyMaxSendSize;
461 afs_uint32 spare[21];
464 /* struct for checkservers */
475 /* state bits for volume */
476 #define VRO 1 /* volume is readonly */
477 #define VRecheck 2 /* recheck volume info with server */
478 #define VBackup 4 /* is this a backup volume? */
479 #define VForeign 8 /* this is a non-afs volume */
480 #define VResort 16 /* server order was rearranged, sort when able */
481 #define VMoreReps 32 /* This volume has more replicas than we are */
482 /* keeping track of now -- check with VLDB */
484 enum repstate { not_busy, end_not_busy = 6, rd_busy, rdwr_busy, offline };
487 /* One structure per volume, describing where the volume is located
488 * and where its mount points are. */
489 struct volume *next; /* Next volume in hash list. */
490 afs_int32 cell; /* the cell in which the volume resides */
491 afs_rwlock_t lock; /* the lock for this structure */
492 afs_int32 volume; /* This volume's ID number. */
493 char *name; /* This volume's name, or 0 if unknown */
494 struct server *serverHost[MAXHOSTS]; /* servers serving this volume */
495 enum repstate status[MAXHOSTS]; /* busy, offline, etc */
496 struct VenusFid dotdot; /* dir to access as .. */
497 struct VenusFid mtpoint; /* The mount point for this volume. */
498 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
501 afs_int32 rwVol; /* For r/o vols, original read/write volume. */
502 afs_int32 accessTime; /* last time we used it */
503 afs_int32 vtix; /* volume table index */
504 afs_int32 copyDate; /* copyDate field, for tracking vol releases */
505 afs_int32 expireTime; /* for per-volume callbacks... */
506 short refCount; /* reference count for allocation */
507 char states; /* here for alignment reasons */
510 #define afs_PutVolume(av, locktype) ((av)->refCount--)
512 /* format of an entry in volume info file */
514 afs_int32 cell; /* cell for this entry */
515 afs_int32 volume; /* volume */
516 afs_int32 next; /* has index */
517 struct VenusFid dotdot; /* .. value */
518 struct VenusFid mtpoint; /* mt point's fid */
519 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
523 struct SimpleLocks *next;
525 afs_int32 boff, eoff;
527 #if defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
532 /* vcache state bits */
533 #define CStatd 0x00000001 /* has this file ever been stat'd? */
534 #define CBackup 0x00000002 /* file is on a backup volume */
535 #define CRO 0x00000004 /* is it on a read-only volume */
536 #define CMValid 0x00000008 /* is the mount point info valid? */
537 #define CCore 0x00000010 /* storing a core file, needed since we don't get an open */
538 #define CDirty 0x00000020 /* file has been modified since first open (... O_RDWR) */
539 #define CSafeStore 0x00000040 /* close must wait for store to finish (should be in fd) */
540 #define CMAPPED 0x00000080 /* Mapped files; primarily used by SunOS 4.0.x */
541 #define CNSHARE 0x00000100 /* support O_NSHARE semantics */
542 #define CLied 0x00000200
543 #define CTruth 0x00000400
545 #define CWired 0x00000800 /* OSF hack only */
547 #ifdef AFS_DARWIN80_ENV
548 #define CDeadVnode 0x00000800
550 #ifdef AFS_DARWIN_ENV
551 #define CUBCinit 0x00000800
553 #define CWRITE_IGN 0x00000800 /* Next OS hack only */
557 #define CUnique 0x00001000 /* vc's uniquifier - latest unifiquier for fid */
558 #define CForeign 0x00002000 /* this is a non-afs vcache */
559 #define CReadDir 0x00004000 /* readdir in progress */
560 #define CUnlinked 0x00010000
561 #define CBulkStat 0x00020000 /* loaded by a bulk stat, and not ref'd since */
562 #define CUnlinkedDel 0x00040000
563 #define CVFlushed 0x00080000
564 #define CCore1 0x00100000 /* osf1 core file; not same as CCore above */
565 #ifdef AFS_LINUX22_ENV
566 #define CPageWrite 0x00200000 /* to detect vm deadlock - linux */
568 #define CWritingUFS 0x00200000 /* to detect vm deadlock - used by sgi */
570 #define CCreating 0x00400000 /* avoid needless store after open truncate */
571 #define CPageHog 0x00800000 /* AIX - dumping large cores is a page hog. */
572 #define CDCLock 0x02000000 /* Vnode lock held over call to GetDownD */
573 #define CBulkFetching 0x04000000 /* stats are being fetched by bulk stat */
574 #define CExtendedFile 0x08000000 /* extended file via ftruncate call. */
575 #define CVInit 0x10000000 /* being initialized */
577 /* vcache vstate bits */
578 #define VRevokeWait 0x1
579 #define VPageCleaning 0x2 /* Solaris - Cache Trunc Daemon sez keep out */
581 #if defined(AFS_DISCON_ENV)
583 /* Dirty disconnected vcache flags. */
584 #define VDisconSetTime 0x00000001 /* set time. */
585 #define VDisconSetMode 0x00000002 /* set mode. */
586 /* XXX: to be continued ? */
587 #define VDisconTrunc 0x00000020 /* truncate file. */
588 #define VDisconSetAttrMask 0x0000003F /* Masks for setattr ops. */
589 #define VDisconWriteClose 0x00000400 /* Write op on file close. */
590 #define VDisconWriteFlush 0x00000800 /* Write op on normal fsync/flush. */
591 #define VDisconWriteOsiFlush 0x00001000 /* Write op on osi flush. */
593 #define VDisconShadowed 0x00002000 /* Shadowed dir. */
594 #define VDisconRemove 0x00004000 /* Remove vnop. */
595 #define VDisconCreate 0x00008000 /* Create vnop. */
596 #define VDisconRename 0x00010000 /* Rename vnop. */
597 #define VDisconRenameSameDir 0x00020000 /* Rename in same dir. */
599 /*... to be continued ... */
602 #if defined(AFS_CACHE_BYPASS)
603 /* vcache (file) cachingStates bits */
604 #define FCSDesireBypass 0x1 /* This file should bypass the cache */
605 #define FCSBypass 0x2 /* This file is currently NOT being cached */
606 #define FCSManuallySet 0x4 /* The bypass flags were set, or reset, manually (via pioctl)
607 and should not be overridden by the file's name */
609 /* Flag values used by the Transition routines */
610 #define TRANSChangeDesiredBit 0x1 /* The Transition routine should set or
611 * reset the FCSDesireBypass bit */
612 #define TRANSVcacheIsLocked 0x2 /* The Transition routine does not need to
613 * lock vcache (it's already locked) */
614 #define TRANSSetManualBit 0x4 /* The Transition routine should set FCSManuallySet so that
615 * filename checking does not override pioctl requests */
616 #endif /* AFS_CACHE_BYPASS */
619 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
620 #define vrefCount v->v_usecount
622 #define vrefCount v.v_count
623 #endif /* AFS_XBSD_ENV */
625 #if defined(AFS_DARWIN80_ENV)
626 #define VREFCOUNT_GT(v, y) vnode_isinuse(AFSTOV(v), (y))
627 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
628 #define VREFCOUNT(v) ((v)->vrefCount)
629 #define VREFCOUNT_GT(v, y) (AFSTOV(v)->v_usecount > (y))
630 #elif defined(AFS_LINUX24_ENV)
631 #define VREFCOUNT(v) atomic_read(&(AFSTOV(v)->v_count))
632 #define VREFCOUNT_GT(v, y) (VREFCOUNT(v)>y)
633 #define VREFCOUNT_SET(v, c) atomic_set(&(AFSTOV(v)->v_count), c)
634 #define VREFCOUNT_DEC(v) atomic_dec(&(AFSTOV(v)->v_count))
635 #define VREFCOUNT_INC(v) atomic_inc(&(AFSTOV(v)->v_count))
637 #define VREFCOUNT(v) ((v)->vrefCount)
638 #define VREFCOUNT_GT(v,y) ((v)->vrefCount > (y))
639 #define VREFCOUNT_SET(v, c) (v)->vrefCount = c;
640 #define VREFCOUNT_DEC(v) (v)->vrefCount--;
641 #define VREFCOUNT_INC(v) (v)->vrefCount++;
642 #define d_unhash(d) list_empty(&(d)->d_hash)
643 #define dget_locked(d) dget(d)
646 #define AFS_MAXDV 0x7fffffff /* largest dataversion number */
647 #ifdef AFS_64BIT_CLIENT
648 #define AFS_NOTRUNC 0x7fffffffffffffffLL /* largest positive int64 number */
649 #else /* AFS_64BIT_CLIENT */
650 #define AFS_NOTRUNC 0x7fffffff /* largest dataversion number */
651 #endif /* AFS_64BIT_CLIENT */
653 extern afs_int32 vmPageHog; /* counter for # of vnodes which are page hogs. */
655 #if defined(AFS_DARWIN80_ENV)
656 #define VTOAFS(v) ((struct vcache *)vnode_fsnode((v)))
657 #define AFSTOV(vc) ((vc)->v)
658 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
659 #define VTOAFS(v) ((struct vcache *)(v)->v_data)
660 #define AFSTOV(vc) ((vc)->v)
662 #define VTOAFS(V) ((struct vcache *)(V))
663 #define AFSTOV(V) (&(V)->v)
666 /* INVARIANTs: (vlruq.next != NULL) == (vlruq.prev != NULL)
667 * nextfree => !vlruq.next && ! vlruq.prev
668 * !(avc->nextfree) && !avc->vlruq.next => (FreeVCList == avc->nextfree)
671 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
674 struct vnode v; /* Has reference count in v.v_count */
676 struct afs_q vlruq; /* lru q next and prev */
677 #if !defined(AFS_LINUX22_ENV)
678 struct vcache *nextfree; /* next on free list (if free) */
680 struct vcache *hnext; /* Hash next */
681 struct afs_q vhashq; /* Hashed per-volume list */
683 #if defined(AFS_DISCON_ENV)
684 /*! Next element in afs_DDirtyVCList. Lock it with afs_DDirtyVCListLock. */
685 struct vcache *ddirty_next;
686 /*! Disconnected flags for this vcache element. */
687 uint32_t ddirty_flags;
688 /*! Shadow vnode + unique keep the shadow dir location. */
691 /*! The old parent FID for renamed vnodes. */
693 afs_uint32 oldUnique;
699 afs_hyper_t DataVersion;
703 afs_uint16 Mode; /* XXXX Should be afs_int32 XXXX */
704 afs_uint16 LinkCount;
705 #ifdef AFS_DARWIN80_ENV
708 /* vnode type is in v.v_type */
711 afs_rwlock_t lock; /* The lock on the vcache contents. */
712 #if defined(AFS_SUN5_ENV)
713 /* Lock used to protect the activeV, multipage, and vstates fields.
714 * Do not try to get the vcache lock when the vlock is held */
716 #endif /* defined(AFS_SUN5_ENV) */
717 #if defined(AFS_SUN5_ENV)
721 #ifdef AFS_BOZONLOCK_ENV
722 afs_bozoLock_t pvnLock; /* see locks.x */
727 #if defined(AFS_AIX51_ENV)
735 int ownslock; /* pid of owner of excl lock, else 0 - defect 3083 */
737 #ifdef AFS_DARWIN80_ENV
739 #elif defined(AFS_DARWIN_ENV)
740 struct lock__bsd__ rwlock;
745 afs_int32 parentVnode; /* Parent dir, if a file. */
746 afs_int32 parentUnique;
747 struct VenusFid *mvid; /* Either parent dir (if root) or root (if mt pt) */
748 char *linkData; /* Link data if a symlink. */
749 afs_hyper_t flushDV; /* data version last flushed from text */
750 afs_hyper_t mapDV; /* data version last flushed from map */
751 afs_size_t truncPos; /* truncate file to this position at next store */
752 struct server *callback; /* The callback host, if any */
753 afs_uint32 cbExpires; /* time the callback expires */
754 struct afs_q callsort; /* queue in expiry order, sort of */
755 struct axscache *Access; /* a list of cached access bits */
756 afs_int32 anyAccess; /* System:AnyUser's access to this. */
757 afs_int32 last_looker; /* pag/uid from last lookup here */
758 #if defined(AFS_SUN5_ENV)
760 #endif /* defined(AFS_SUN5_ENV) */
761 struct SimpleLocks *slocks;
762 short opens; /* The numbers of opens, read or write, on this file. */
763 short execsOrWriters; /* The number of execs (if < 0) or writers (if > 0) of
765 short flockCount; /* count of flock readers, or -1 if writer */
766 char mvstat; /* 0->normal, 1->mt pt, 2->root. */
768 #if defined(AFS_CACHE_BYPASS)
769 char cachingStates; /* Caching policies for this file */
770 afs_uint32 cachingTransitions; /* # of times file has flopped between caching and not */
771 #if defined(AFS_LINUX24_ENV)
772 off_t next_seq_offset; /* Next sequential offset (used by prefetch/readahead) */
774 off_t next_seq_blk_offset; /* accounted in blocks for Solaris & IRIX */
778 afs_uint32 states; /* state bits */
779 #if defined(AFS_SUN5_ENV)
780 afs_uint32 vstates; /* vstate bits */
781 #endif /* defined(AFS_SUN5_ENV) */
782 struct dcache *dchint;
783 struct dcache *dcreaddir; /* dcache for in-progress readdir */
784 unsigned int readdir_pid; /* pid of the thread in readdir */
785 #ifdef AFS_LINUX22_ENV
786 u_short mapcnt; /* Number of mappings of this file. */
788 #if defined(AFS_SGI_ENV)
789 daddr_t lastr; /* for read-ahead */
791 uint64_t vc_rwlockid; /* kthread owning rwlock */
793 short vc_rwlockid; /* pid of process owning rwlock */
795 short vc_locktrips; /* # of rwlock reacquisitions */
796 sema_t vc_rwlock; /* vop_rwlock for afs */
797 pgno_t mapcnt; /* # of pages mapped */
798 struct cred *cred; /* last writer's cred */
800 struct bhv_desc vc_bhv_desc; /* vnode's behavior data. */
802 #endif /* AFS_SGI_ENV */
803 afs_int32 vc_error; /* stash write error for this vnode. */
804 int xlatordv; /* Used by nfs xlator */
805 struct AFS_UCRED *uncred;
806 int asynchrony; /* num kbytes to store behind */
808 short multiPage; /* count of multi-page getpages in progress */
812 #define DONT_CHECK_MODE_BITS 0
813 #define CHECK_MODE_BITS 1
814 #define CMB_ALLOW_EXEC_AS_READ 2 /* For the NFS xlator */
816 #if defined(AFS_SGI_ENV)
817 #define AVCRWLOCK(avc) (valusema(&(avc)->vc_rwlock) <= 0)
819 /* SGI vnode rwlock macros and flags. */
820 #ifndef AFS_SGI62_ENV
821 /* The following are defined here. SGI 6.2 declares them in vnode.h */
822 #define VRWLOCK_READ 0
823 #define VRWLOCK_WRITE 1
824 #define VRWLOCK_WRITE_DIRECT 2
829 #define AFS_RWLOCK_T vrwlock_t
831 #define AFS_RWLOCK_T int
832 #endif /* AFS_SGI62_ENV */
834 #include <ksys/behavior.h>
835 #define AFS_RWLOCK(V,F) \
836 afs_rwlock(&VTOAFS(V)->vc_bhv_desc, (F));
837 #define AFS_RWUNLOCK(V,F) \
838 afs_rwunlock(&VTOAFS(V)->vc_bhv_desc, (F));
841 #define AFS_RWLOCK(V,F) afs_rwlock((vnode_t *)(V), (F) )
842 #define AFS_RWUNLOCK(V,F) afs_rwunlock((vnode_t *)(V), (F) )
844 #else /* AFS_SGI53_ENV */
845 #define AFS_RWLOCK(V,F) afs_rwlock((V))
846 #define AFS_RWUNLOCK(V,F) afs_rwunlock((V))
847 #endif /* AFS_SGI53_ENV */
848 #endif /* AFS_SGI_ENV */
852 afs_hyper_t DataVersion;
854 afs_int32 parentVnode;
855 afs_int32 parentUnique;
859 afs_int32 randomUid[CPSIZE];
860 afs_int32 callback; /* Now a pointer to 'server' struct */
862 afs_int32 randomAccess[CPSIZE];
865 short execsOrWriters;
872 afs_int32 callerAccess;
883 /* CM inititialization parameters. What CM actually used after calculations
884 * based on passed in arguments.
886 #define CMI_VERSION 1 /* increment when adding new fields. */
887 struct cm_initparams {
892 int cmi_nVolumeCaches;
893 int cmi_firstChunkSize;
894 int cmi_otherChunkSize;
895 int cmi_cacheSize; /* The original cache size, in 1K blocks. */
896 unsigned cmi_setTime:1;
897 unsigned cmi_memCache:1;
898 int spare[16 - 9]; /* size of struct is 16 * 4 = 64 bytes */
902 /*----------------------------------------------------------------------
903 * AFS Data cache definitions
905 * Each entry describes a Unix file on the local disk that is
906 * is serving as a cached copy of all or part of a Vice file.
907 * Entries live in circular queues for each hash table slot
909 * Which queue is this thing in? Good question.
910 * A struct dcache entry is in the freeDSlot queue when not associated with a cache slot (file).
911 * Otherwise, it is in the DLRU queue. The freeDSlot queue uses the lruq.next field as
912 * its "next" pointer.
914 * Cache entries in the DLRU queue are either associated with vice files, in which case
915 * they are hashed by afs_dvnextTbl and afs_dcnextTbl pointers, or they are in the freeDCList
916 * and are not associated with any vice file. This last list uses the afs_dvnextTbl pointer for
917 * its "next" pointer.
918 *----------------------------------------------------------------------*/
920 #define NULLIDX (-1) /* null index definition */
921 /* struct dcache states bits */
925 #define DWriting 8 /* file being written (used for cache validation) */
927 /* dcache data flags */
928 #define DFEntryMod 0x02 /* has entry itself been modified? */
929 #define DFFetching 0x04 /* file is currently being fetched */
931 /* dcache meta flags */
932 #define DFNextStarted 0x01 /* next chunk has been prefetched already */
933 #define DFFetchReq 0x10 /* someone is waiting for DFFetching to go on */
936 /* flags in afs_indexFlags array */
937 #define IFEverUsed 1 /* index entry has >= 1 byte of data */
938 #define IFFree 2 /* index entry in freeDCList */
939 #define IFDataMod 4 /* file needs to be written out */
940 #define IFFlag 8 /* utility flag */
941 #define IFDirtyPages 16
942 #define IFAnyPages 32
943 #define IFDiscarded 64 /* index entry in discardDCList */
946 char *in; /* input buffer */
947 char *out; /* output buffer */
948 short in_size; /* Size of input buffer <= 2K */
949 short out_size; /* Maximum size of output buffer, <= 2K */
953 * This version of afs_ioctl is required to pass in 32 bit user space
954 * pointers into a 64 bit kernel.
965 /* CacheItems file has a header of type struct afs_fheader
966 * (keep aligned properly). Since we already have sgi_62 clients running
967 * with a 32 bit inode, a change is required to the header so that
968 * they can distinguish the old 32 bit inode CacheItems file and zap it
969 * instead of using it.
972 #define AFS_FHMAGIC 0x7635abaf /* uses version number */
974 #if defined(AFS_SUN57_64BIT_ENV)
975 #define AFS_CI_VERSION 3
977 #define AFS_CI_VERSION 2
980 afs_int32 firstCSize;
981 afs_int32 otherCSize;
984 #if defined(AFS_SGI61_ENV) || defined(AFS_SUN57_64BIT_ENV)
985 /* Using ino64_t here so that user level debugging programs compile
986 * the size correctly.
988 #define afs_inode_t ino64_t
990 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_S390X_LINUX24_ENV)
991 #define afs_inode_t long
993 #if defined(AFS_AIX51_ENV) || defined(AFS_HPUX1123_ENV)
994 #define afs_inode_t ino_t
996 #define afs_inode_t afs_int32
1003 /* it does not compile outside kernel */
1005 afs_int32 fid; /* is adc->index, the cache file number */
1006 afs_inode_t inode; /* is adc->f.inode, the inode number of the cac\
1008 #if defined(LINUX_USE_FH)
1009 struct fid fh; /* Opaque file handle */
1010 int fh_type; /* Opaque file handle type */
1013 afs_int32 accesstime;
1014 struct buffer *hashNext;
1019 #if defined(AFS_USEBUFFERS)
1022 afs_rwlock_t lock; /* the lock for this structure */
1025 /* kept on disk and in dcache entries */
1027 struct VenusFid fid; /* Fid for this file */
1028 afs_int32 modTime; /* last time this entry was modified */
1029 afs_hyper_t versionNo; /* Associated data version number */
1030 afs_int32 chunk; /* Relative chunk number */
1031 afs_inode_t inode; /* Unix inode for this chunk */
1032 afs_int32 chunkBytes; /* Num bytes in this chunk */
1033 char states; /* Has this chunk been modified? */
1034 #if defined(LINUX_USE_FH)
1035 struct fid fh; /* File handle */
1036 int fh_type; /* File handle type */
1041 /* magic numbers to specify the cache type */
1043 #define AFS_FCACHE_TYPE_UFS 0x0
1044 #define AFS_FCACHE_TYPE_MEM 0x1
1045 #define AFS_FCACHE_TYPE_NFS 0x2
1046 #define AFS_FCACHE_TYPE_EPI 0x3
1048 /* kept in memory */
1050 struct afs_q lruq; /* Free queue for in-memory images */
1051 struct afs_q dirty; /* Queue of dirty entries that need written */
1052 afs_rwlock_t lock; /* Protects validPos, some f */
1053 afs_rwlock_t tlock; /* Atomizes updates to refCount */
1054 afs_rwlock_t mflock; /* Atomizes accesses/updates to mflags */
1055 afs_size_t validPos; /* number of valid bytes during fetch */
1056 afs_int32 index; /* The index in the CacheInfo file */
1057 short refCount; /* Associated reference count. */
1058 char dflags; /* Data flags */
1059 char mflags; /* Meta flags */
1060 struct fcache f; /* disk image */
1061 afs_int32 bucket; /* which bucket these dcache entries are in */
1065 * dcache.lock protects the actual contents of the cache file (in
1066 * f.inode), subfields of f except those noted below, dflags and
1069 * dcache.tlock is used to make atomic updates to refCount. Zero
1070 * refCount dcache entries are protected by afs_xdcache instead of
1073 * dcache.mflock is used to access and update mflags. It cannot be
1074 * held without holding the corresponding dcache.lock. Updating
1075 * mflags requires holding dcache.lock(R) and dcache.mflock(W), and
1076 * checking for mflags requires dcache.lock(R) and dcache.mflock(R).
1077 * Note that dcache.lock(W) gives you the right to update mflags,
1078 * as dcache.mflock(W) can only be held with dcache.lock(R).
1080 * dcache.index, dcache.f.fid, dcache.f.chunk and dcache.f.inode are
1081 * write-protected by afs_xdcache and read-protected by refCount.
1082 * Once an entry is referenced, these values cannot change, and if
1083 * it's on the free list (with refCount=0), it can be reused for a
1084 * different file/chunk. These values can only be written while
1085 * holding afs_xdcache(W) and allocating this dcache entry (thereby
1086 * ensuring noone else has a refCount on it).
1090 /* afs_memcache.c */
1091 struct memCacheEntry {
1092 int size; /* # of valid bytes in this entry */
1093 int dataSize; /* size of allocated data area */
1094 afs_lock_t afs_memLock;
1095 char *data; /* bytes */
1098 /* macro to mark a dcache entry as bad */
1101 (x)->f.fid.Fid.Unique = 0; \
1102 afs_indexUnique[(x)->index] = 0; \
1103 (x)->dflags |= DFEntryMod; \
1106 /* FakeOpen and Fake Close used to be real subroutines. They're only used in
1107 * sun_subr and afs_vnodeops, and they're very frequently called, so I made
1108 * them into macros. They do:
1109 * FakeOpen: fake the file being open for writing. avc->lock must be held
1110 * in write mode. Having the file open for writing is like having a DFS
1111 * write-token: you're known to have the best version of the data around,
1112 * and so the CM won't let it be overwritten by random server info.
1113 * FakeClose: undo the effects of FakeOpen, noting that we want to ensure
1114 * that a real close eventually gets done. We use CCore to achieve this if
1115 * we would end up closing the file. avc->lock must be held in write mode */
1117 #ifdef AFS_AIX_IAUTH_ENV
1118 #define CRKEEP(V, C) (V)->linkData = (char*)crdup((C))
1120 #define CRKEEP(V, C) crhold((C)); (V)->linkData = (char*)(C)
1123 #define afs_FakeOpen(avc) { avc->opens++; avc->execsOrWriters++; }
1124 #define afs_FakeClose(avc, acred) \
1125 { if (avc->execsOrWriters == 1) { \
1126 /* we're the last writer, just use CCore flag */ \
1127 avc->states |= CCore; /* causes close to be called later */ \
1129 /* The cred and vnode holds will be released in afs_FlushActiveVcaches */ \
1130 VN_HOLD(AFSTOV(avc)); /* So it won't disappear */ \
1131 CRKEEP(avc, acred); /* Should use a better place for the creds */ \
1134 /* we're not the last writer, let the last one do the store-back for us */ \
1136 avc->execsOrWriters--; \
1140 #define AFS_ZEROS 64 /* zero buffer */
1142 /*#define afs_DirtyPages(avc) (((avc)->states & CDirty) || osi_VMDirty_p((avc)))*/
1143 #define afs_DirtyPages(avc) ((avc)->states & CDirty)
1145 #define afs_InReadDir(avc) (((avc)->states & CReadDir) && (avc)->readdir_pid == MyPidxx)
1147 /* The PFlush algorithm makes use of the fact that Fid.Unique is not used in
1148 below hash algorithms. Change it if need be so that flushing algorithm
1149 doesn't move things from one hash chain to another
1151 /* extern int afs_dhashsize; */
1152 #define DCHash(v, c) ((((v)->Fid.Vnode + (v)->Fid.Volume + (c))) & (afs_dhashsize-1))
1153 /*Vnode, Chunk -> Hash table index */
1154 #define DVHash(v) ((((v)->Fid.Vnode + (v)->Fid.Volume )) & (afs_dhashsize-1))
1155 /*Vnode -> Other hash table index */
1156 /* don't hash on the cell, our callback-breaking code sometimes fails to compute
1157 the cell correctly, and only scans one hash bucket */
1158 #define VCHash(fid) (((fid)->Fid.Volume + (fid)->Fid.Vnode) & (VCSIZE-1))
1159 /* Hash only on volume to speed up volume callbacks. */
1160 #define VCHashV(fid) ((fid)->Fid.Volume & (VCSIZE-1))
1162 extern struct dcache **afs_indexTable; /*Pointers to in-memory dcache entries */
1163 extern afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
1164 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
1165 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
1166 extern afs_int32 afs_cacheFiles; /*Size of afs_indexTable */
1167 extern afs_int32 afs_cacheBlocks; /*1K blocks in cache */
1168 extern afs_int32 afs_cacheStats; /*Stat entries in cache */
1169 extern struct vcache *afs_vhashT[VCSIZE]; /*Stat cache hash table */
1170 extern struct afs_q afs_vhashTV[VCSIZE]; /* cache hash table on volume */
1171 extern afs_int32 afs_initState; /*Initialization state */
1172 extern afs_int32 afs_termState; /* Termination state */
1173 extern struct VenusFid afs_rootFid; /*Root for whole file system */
1174 extern afs_int32 afs_allCBs; /* Count of callbacks */
1175 extern afs_int32 afs_oddCBs; /* Count of odd callbacks */
1176 extern afs_int32 afs_evenCBs; /* Count of even callbacks */
1177 extern afs_int32 afs_allZaps; /* Count of fid deletes */
1178 extern afs_int32 afs_oddZaps; /* Count of odd fid deletes */
1179 extern afs_int32 afs_evenZaps; /* Count of even fid deletes */
1180 extern struct brequest afs_brs[NBRS]; /* request structures */
1182 #define UHash(auid) ((auid) & (NUSERS-1))
1183 #define VHash(avol) ((avol)&(NVOLS-1))
1184 #define SHash(aserv) ((ntohl(aserv)) & (NSERVERS-1))
1185 #define FVHash(acell,avol) (((avol)+(acell)) & (NFENTRIES-1))
1187 /* Performance hack - we could replace VerifyVCache2 with the appropriate
1188 * GetVCache incantation, and could eliminate even this code from afs_UFSRead
1189 * by making intentionally invalidating quick.stamp in the various callbacks
1190 * expiration/breaking code */
1191 #ifdef AFS_DARWIN_ENV
1192 #define afs_VerifyVCache(avc, areq) \
1193 (((avc)->states & CStatd) ? (osi_VM_Setup(avc, 0), 0) : \
1194 afs_VerifyVCache2((avc),areq))
1196 #define afs_VerifyVCache(avc, areq) \
1197 (((avc)->states & CStatd) ? 0 : afs_VerifyVCache2((avc),areq))
1200 #define DO_STATS 1 /* bits used by FindVCache */
1205 /* values for flag param of afs_CheckVolumeNames */
1206 #define AFS_VOLCHECK_EXPIRED 0x1 /* volumes whose callbacks have expired */
1207 #define AFS_VOLCHECK_BUSY 0x2 /* volumes which were marked busy */
1208 #define AFS_VOLCHECK_MTPTS 0x4 /* mount point invalidation also */
1209 #define AFS_VOLCHECK_FORCE 0x8 /* do all forcibly */
1213 #define AFS_FSPORT ((unsigned short) htons(7000))
1214 #define AFS_VLPORT ((unsigned short) htons(7003))
1216 #define afs_read(avc, uio, acred, albn, abpp, nolock) \
1217 (*(afs_cacheType->vread))(avc, uio, acred, albn, abpp, nolock)
1218 #define afs_write(avc, uio, aio, acred, nolock) \
1219 (*(afs_cacheType->vwrite))(avc, uio, aio, acred, nolock)
1221 #define afs_rdwr(avc, uio, rw, io, cred) \
1222 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 0) : afs_read(avc, uio, cred, 0, 0, 0))
1223 #define afs_nlrdwr(avc, uio, rw, io, cred) \
1224 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 1) : afs_read(avc, uio, cred, 0, 0, 1))
1226 /* Cache size truncation uses the following low and high water marks:
1227 * If the cache is more than 95% full (CM_DCACHECOUNTFREEPCT), the cache
1228 * truncation daemon is awakened and will free up space until the cache is 85%
1229 * (CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT) full.
1230 * afs_UFSWrite and afs_GetDCache (when it needs to fetch data) will wait on
1231 * afs_WaitForCacheDrain if the cache is 98% (CM_WAITFORDRAINPCT) full.
1232 * afs_GetDownD wakes those processes once the cache is 95% full
1233 * (CM_CACHESIZEDRAINEDPCT).
1235 #define CM_MAXDISCARDEDCHUNKS 16 /* # of chunks */
1236 #define CM_DCACHECOUNTFREEPCT 95 /* max pct of chunks in use */
1237 #define CM_DCACHESPACEFREEPCT 90 /* max pct of space in use */
1238 #define CM_DCACHEEXTRAPCT 5 /* extra to get when freeing */
1239 #define CM_CACHESIZEDRAINEDPCT 95 /* wakeup processes when down to here. */
1240 #define CM_WAITFORDRAINPCT 98 /* sleep if cache is this full. */
1242 /* when afs_cacheBlocks is large, settle for slightly decreased precision */
1243 #define PERCENT(p, v) \
1244 ((afs_cacheBlocks & 0xffe00000) ? ((v) / 100 * (p)) : ((p) * (v) / 100))
1246 #define afs_CacheIsTooFull() \
1247 (afs_blocksUsed - afs_blocksDiscarded > \
1248 PERCENT(CM_DCACHECOUNTFREEPCT, afs_cacheBlocks) || \
1249 afs_freeDCCount - afs_discardDCCount < \
1250 PERCENT(100 - CM_DCACHECOUNTFREEPCT, afs_cacheFiles))
1252 /* Handy max length of a numeric string. */
1253 #define CVBS 12 /* max afs_int32 is 2^32 ~ 4*10^9, +1 for NULL, +luck */
1255 #define refpanic(foo) if (afs_norefpanic) \
1256 { printf( foo ); afs_norefpanic++;} else osi_Panic( foo )
1259 ** these are defined in the AIX source code sys/fs_locks.h but are not
1260 ** defined anywhere in the /usr/include directory
1262 #if defined(AFS_AIX41_ENV)
1263 #define VN_LOCK(vp) simple_lock(&(vp)->v_lock)
1264 #define VN_UNLOCK(vp) simple_unlock(&(vp)->v_lock)
1267 /* get a file's serial number from a vnode */
1268 #ifndef afs_vnodeToInumber
1269 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1270 #define afs_vnodeToInumber(V) VnodeToIno(V)
1272 #ifdef AFS_DECOSF_ENV
1273 #define afs_vnodeToInumber(V) osi_vnodeToInumber(V)
1275 #define afs_vnodeToInumber(V) (VTOI(V)->i_number)
1276 #endif /* AFS_DECOSF_ENV */
1277 #endif /* AFS_SGI62_ENV */
1280 /* get a file's device number from a vnode */
1281 #ifndef afs_vnodeToDev
1282 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1283 #define afs_vnodeToDev(V) VnodeToDev(V)
1284 #elif defined(AFS_DECOSF_ENV)
1285 #define afs_vnodeToDev(V) osi_vnodeToDev(V)
1287 #define afs_vnodeToDev(V) (VTOI(V)->i_dev)
1292 /* Note: this should agree with the definition in kdump.c */
1293 #if defined(AFS_OSF_ENV)
1294 #if !defined(UKERNEL)
1295 #define AFS_USEBUFFERS 1
1299 #if !defined(UKERNEL) && !defined(HAVE_STRUCT_BUF)
1300 /* declare something so that prototypes don't flip out */
1301 /* appears struct buf stuff is only actually passed around as a pointer,
1302 except with libuafs, in which case it is actually defined */
1307 /* fakestat support: opaque storage for afs_EvalFakeStat to remember
1308 * what vcache should be released.
1310 struct afs_fakestat_state {
1314 struct vcache *root_vp;
1317 extern int afs_fakestat_enable;
1318 #endif /* _AFS_H_ */