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
180 * Circular queues, implemented with pointers. Structures may contain as many
181 * queues as required, which may be located at any point within the structure,
182 * providing the QEntry macro is used to translate between a queue pointer, and
183 * the address of its containing structure
191 #define QZero(e) ((e)->prev = (e)->next = NULL)
192 #define QInit(q) ((q)->prev = (q)->next = (q))
193 #define QAdd(q,e) ((e)->next = (q)->next, (e)->prev = (q), \
194 (q)->next->prev = (e), (q)->next = (e))
195 #define QRemove(e) ((e)->next->prev = (e)->prev, (e)->prev->next = (e)->next, (e)->prev = NULL, (e)->next = NULL)
196 #define QNext(e) ((e)->next)
197 #define QPrev(e) ((e)->prev)
198 #define QEmpty(q) ((q)->prev == (q))
199 /* this one takes q1 and sticks it on the end of q2 - that is, the other end, not the end
200 * that things are added onto. q1 shouldn't be empty, it's silly */
201 #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))
203 /* Given a pointer to an afs_q within a structure, go back to the address of
204 * the parent structure
207 #define QEntry(queue, structure, member) \
208 ((structure *)((char *)(queue)-(char *)(&((structure *)NULL)->member)))
210 /* And implement operations for individual lists in terms of the above macro */
212 #define QTOV(e) QEntry(e, struct vcache, vlruq)
213 #define QTOC(e) QEntry(e, struct cell, lruq)
214 #define QTOVH(e) QEntry(e, struct vcache, vhashq)
217 * List of free slot numbers
219 struct afs_slotlist {
221 struct afs_slotlist *next;
225 afs_int32 uid; /* user id making the request */
226 afs_int32 busyCount; /* how many busies we've seen so far */
227 afs_int32 flags; /* things like O_SYNC, O_NONBLOCK go here */
228 char initd; /* if non-zero, Error fields meaningful */
229 char accessError; /* flags for overriding error return code */
230 char volumeError; /* encountered a missing or busy volume */
231 char networkError; /* encountered network problems */
232 char permWriteError; /* fileserver returns permenent error. */
233 char tokenError; /* a token error other than expired. */
234 char idleError; /* the server idled too long */
235 char skipserver[MAXHOSTS];
240 /* structure linked off of a server to keep track of queued returned
241 * callbacks. Sent asynchronously when we run a little low on free dudes.
244 struct afs_cbr **pprev;
245 struct afs_cbr *next;
247 struct afs_cbr **hash_pprev;
248 struct afs_cbr *hash_next;
253 /* cellinfo file magic number */
254 #define AFS_CELLINFO_MAGIC 0xf32817cd
257 #define CNoSUID 0x02 /* disable suid bit for this cell */
258 #define CLinkedCell4 0x04 /* reserved for ADDCELL2 pioctl */
259 #define CNoAFSDB 0x08 /* never bother trying AFSDB */
260 #define CHasVolRef 0x10 /* volumes were referenced */
261 #define CLinkedCell 0x20 /* has a linked cell in lcellp */
264 struct afs_q lruq; /* lru q next and prev */
265 char *cellName; /* char string name of cell */
266 afs_int32 cellIndex; /* sequence number */
267 afs_int32 cellNum; /* semi-permanent cell number */
268 struct server *cellHosts[MAXCELLHOSTS]; /* volume *location* hosts */
269 struct cell *lcellp; /* Associated linked cell */
270 u_short fsport; /* file server port */
271 u_short vlport; /* volume server port */
272 short states; /* state flags */
273 time_t timeout; /* data expire time, if non-zero */
274 struct cell_name *cnamep; /* pointer to our cell_name */
275 afs_rwlock_t lock; /* protects cell data */
276 unsigned char cellHandle[16]; /* deterministic handle for this cell */
280 struct cell_name *next;
287 struct cell_alias *next;
293 #define afs_PutCell(cellp, locktype)
295 /* the unixuser flag bit definitions */
296 #define UHasTokens 1 /* are the st and ct fields valid (ever set)? */
297 #define UTokensBad 2 /* are tokens bad? */
298 #define UPrimary 4 /* on iff primary identity */
299 #define UNeedsReset 8 /* needs afs_ResetAccessCache call done */
300 #define UPAGCounted 16 /* entry seen during PAG search (for stats) */
301 #define UNFSGetCreds 32 /* getting creds for NFS client */
302 /* A flag used by afs_GCPAGs to keep track of
303 * which entries in afs_users need to be deleted.
304 * The lifetime of its presence in the table is the
305 * lifetime of the afs_GCPAGs function.
307 #define TMP_UPAGNotReferenced 128
309 /* values for afs_gcpags */
310 enum { AFS_GCPAGS_NOTCOMPILED = 0, AFS_GCPAGS_OK =
311 1, AFS_GCPAGS_USERDISABLED, AFS_GCPAGS_EPROC0, AFS_GCPAGS_EPROCN,
312 AFS_GCPAGS_EEQPID, AFS_GCPAGS_EINEXACT, AFS_GCPAGS_EPROCEND,
313 AFS_GCPAGS_EPROCWALK, AFS_GCPAGS_ECREDWALK, AFS_GCPAGS_EPIDCHECK,
314 AFS_GCPAGS_ENICECHECK
317 extern afs_int32 afs_gcpags;
318 extern afs_int32 afs_gcpags_procsize;
319 extern afs_int32 afs_bkvolpref;
320 extern char afs_cachebasedir[1024];
321 extern afs_int32 afs_numcachefiles;
322 extern afs_int32 afs_numfilesperdir;
325 struct unixuser *next; /* next hash pointer */
326 afs_int32 uid; /* search based on uid and cell */
328 afs_int32 vid; /* corresponding vice id in specified cell */
329 short refCount; /* reference count for allocation */
330 char states; /* flag info */
331 afs_int32 tokenTime; /* last time tokens were set, used for timing out conn data */
332 afs_int32 stLen; /* ticket length (if kerberos, includes kvno at head) */
333 char *stp; /* pointer to ticket itself */
334 struct ClearToken ct;
335 struct afs_exporter *exporter; /* more info about the exporter for the remote user */
336 void *cellinfo; /* pointer to cell info (PAG manager only) */
340 /* Per-connection block. */
341 struct afs_conn *next; /* Next dude same server. */
342 struct unixuser *user; /* user validated with respect to. */
343 struct rx_connection *id; /* RPC connid. */
344 struct srvAddr *srvr; /* server associated with this conn */
345 short refCount; /* reference count for allocation */
346 unsigned short port; /* port associated with this connection */
347 char forceConnectFS; /* Should we try again with these tokens? */
353 /* Fid comparison routines */
354 #define FidCmp(a,b) ((a)->Fid.Unique != (b)->Fid.Unique \
355 || (a)->Fid.Vnode != (b)->Fid.Vnode \
356 || (a)->Fid.Volume != (b)->Fid.Volume \
357 || (a)->Cell != (b)->Cell)
359 #define FidMatches(afid,tvc) ((tvc)->f.fid.Fid.Vnode == (afid)->Fid.Vnode && \
360 (tvc)->f.fid.Fid.Volume == (afid)->Fid.Volume && \
361 (tvc)->f.fid.Cell == (afid)->Cell && \
362 ( (tvc)->f.fid.Fid.Unique == (afid)->Fid.Unique || \
363 (!(afid)->Fid.Unique && ((tvc)->f.states & CUnique))))
367 #define SRVADDR_ISDOWN 0x20 /* same as SRVR_ISDOWN */
368 #define SRVADDR_NOUSE 0x40 /* Don't use this srvAddr */
370 struct srvAddr *next_bkt; /* next item in hash bucket */
371 struct srvAddr *next_sa; /* another interface on same host */
372 struct server *server; /* back to parent */
373 struct afs_conn *conns; /* All user connections to this server */
374 afs_int32 sa_ip; /* Host addr in network byte order */
375 u_short sa_iprank; /* indiv ip address priority */
376 u_short sa_portal; /* port addr in network byte order */
381 * Values used in the flags field of the server structure below.
383 * AFS_SERVER_FLAG_ACTIVATED Has the server ever had a user connection
384 * associated with it?
386 #define AFS_SERVER_FLAG_ACTIVATED 0x01
387 #define SNO_LHOSTS 0x04
388 #define SYES_LHOSTS 0x08
389 #define SVLSRV_UUID 0x10
390 #define SRVR_ISDOWN 0x20
391 #define SRVR_MULTIHOMED 0x40
392 #define SRVR_ISGONE 0x80
393 #define SNO_INLINEBULK 0x100
394 #define SNO_64BIT 0x200
396 #define afs_serverSetNo64Bit(s) ((s)->srvr->server->flags |= SNO_64BIT)
397 #define afs_serverHasNo64Bit(s) ((s)->srvr->server->flags & SNO_64BIT)
403 afs_int32 addr_uniquifier;
407 struct srvAddr haddr;
410 #define sr_uuid _suid._srvUuid.suuid
411 #define sr_addr_uniquifier _suid._srvUuid.addr_uniquifier
412 #define sr_host _suid._srvId.haddr.ip
413 #define sr_portal _suid._srvId.haddr.portal
414 #define sr_rank _suid._srvId.haddr.ip_rank
415 #define sr_flags _suid._srvId.haddr.flags
416 #define sr_conns _suid._srvId.haddr.conns
417 struct server *next; /* Ptr to next server in hash chain */
418 struct cell *cell; /* Cell in which this host resides */
419 struct afs_cbr *cbrs; /* Return list of callbacks */
420 afs_int32 activationTime; /* Time when this record was first activated */
421 afs_int32 lastDowntimeStart; /* Time when last downtime incident began */
422 afs_int32 numDowntimeIncidents; /* # (completed) downtime incidents */
423 afs_int32 sumOfDowntimes; /* Total downtime experienced, in seconds */
424 struct srvAddr *addr;
425 afs_uint32 flags; /* Misc flags */
428 #define afs_PutServer(servp, locktype)
430 /* structs for some pioctls - these are (or should be)
438 struct sprefrequest_33 {
439 unsigned short offset;
440 unsigned short num_servers;
444 struct sprefrequest { /* new struct for 3.4 */
445 unsigned short offset;
446 unsigned short num_servers;
447 unsigned short flags;
452 unsigned short next_offset;
453 unsigned short num_servers;
454 struct spref servers[1]; /* we overrun this array intentionally... */
458 unsigned short flags;
459 unsigned short num_servers;
460 struct spref servers[1]; /* we overrun this array intentionally... */
462 /* struct for GAG pioctl
465 afs_uint32 showflags, logflags, logwritethruflag, spare[3];
466 unsigned char spare2[128];
470 #define logwritethruON 1
473 afs_int32 rx_initReceiveWindow, rx_maxReceiveWindow, rx_initSendWindow,
474 rx_maxSendWindow, rxi_nSendFrags, rxi_nRecvFrags, rxi_OrphanFragSize;
475 afs_int32 rx_maxReceiveSize, rx_MyMaxSendSize;
476 afs_uint32 spare[21];
479 /* struct for checkservers */
490 /* state bits for volume */
491 #define VRO 1 /* volume is readonly */
492 #define VRecheck 2 /* recheck volume info with server */
493 #define VBackup 4 /* is this a backup volume? */
494 #define VForeign 8 /* this is a non-afs volume */
495 #define VResort 16 /* server order was rearranged, sort when able */
496 #define VMoreReps 32 /* This volume has more replicas than we are */
497 /* keeping track of now -- check with VLDB */
499 enum repstate { not_busy, end_not_busy = 6, rd_busy, rdwr_busy, offline };
502 /* One structure per volume, describing where the volume is located
503 * and where its mount points are. */
504 struct volume *next; /* Next volume in hash list. */
505 afs_int32 cell; /* the cell in which the volume resides */
506 afs_rwlock_t lock; /* the lock for this structure */
507 afs_int32 volume; /* This volume's ID number. */
508 char *name; /* This volume's name, or 0 if unknown */
509 struct server *serverHost[MAXHOSTS]; /* servers serving this volume */
510 enum repstate status[MAXHOSTS]; /* busy, offline, etc */
511 struct VenusFid dotdot; /* dir to access as .. */
512 struct VenusFid mtpoint; /* The mount point for this volume. */
513 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
516 afs_int32 rwVol; /* For r/o vols, original read/write volume. */
517 afs_int32 accessTime; /* last time we used it */
518 afs_int32 vtix; /* volume table index */
519 afs_int32 copyDate; /* copyDate field, for tracking vol releases */
520 afs_int32 expireTime; /* for per-volume callbacks... */
521 short refCount; /* reference count for allocation */
522 char states; /* here for alignment reasons */
525 #define afs_PutVolume(av, locktype) ((av)->refCount--)
527 /* format of an entry in volume info file */
529 afs_int32 cell; /* cell for this entry */
530 afs_int32 volume; /* volume */
531 afs_int32 next; /* has index */
532 struct VenusFid dotdot; /* .. value */
533 struct VenusFid mtpoint; /* mt point's fid */
534 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
538 struct SimpleLocks *next;
540 afs_int32 boff, eoff;
542 #if defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
547 /* vcache state bits */
548 #define CStatd 0x00000001 /* has this file ever been stat'd? */
549 #define CBackup 0x00000002 /* file is on a backup volume */
550 #define CRO 0x00000004 /* is it on a read-only volume */
551 #define CMValid 0x00000008 /* is the mount point info valid? */
552 #define CCore 0x00000010 /* storing a core file, needed since we don't get an open */
553 #define CDirty 0x00000020 /* file has been modified since first open (... O_RDWR) */
554 #define CSafeStore 0x00000040 /* close must wait for store to finish (should be in fd) */
555 #define CMAPPED 0x00000080 /* Mapped files; primarily used by SunOS 4.0.x */
556 #define CNSHARE 0x00000100 /* support O_NSHARE semantics */
557 #define CLied 0x00000200
558 #define CTruth 0x00000400
560 #define CWired 0x00000800 /* OSF hack only */
562 #ifdef AFS_DARWIN80_ENV
563 #define CDeadVnode 0x00000800
565 #ifdef AFS_DARWIN_ENV
566 #define CUBCinit 0x00000800
568 #define CWRITE_IGN 0x00000800 /* Next OS hack only */
572 #define CUnique 0x00001000 /* vc's uniquifier - latest unifiquier for fid */
573 #define CForeign 0x00002000 /* this is a non-afs vcache */
574 #define CReadDir 0x00004000 /* readdir in progress */
575 #define CUnlinked 0x00010000
576 #define CBulkStat 0x00020000 /* loaded by a bulk stat, and not ref'd since */
577 #define CUnlinkedDel 0x00040000
578 #define CVFlushed 0x00080000
579 #define CCore1 0x00100000 /* osf1 core file; not same as CCore above */
580 #ifdef AFS_LINUX22_ENV
581 #define CPageWrite 0x00200000 /* to detect vm deadlock - linux */
583 #define CWritingUFS 0x00200000 /* to detect vm deadlock - used by sgi */
585 #define CCreating 0x00400000 /* avoid needless store after open truncate */
586 #define CPageHog 0x00800000 /* AIX - dumping large cores is a page hog. */
587 #define CDCLock 0x02000000 /* Vnode lock held over call to GetDownD */
588 #define CBulkFetching 0x04000000 /* stats are being fetched by bulk stat */
589 #define CExtendedFile 0x08000000 /* extended file via ftruncate call. */
590 #define CVInit 0x10000000 /* being initialized */
591 #define CMetaDirty 0x20000000 /* vnode meta-data needs to be flushed */
593 /* vcache vstate bits */
594 #define VRevokeWait 0x1
595 #define VPageCleaning 0x2 /* Solaris - Cache Trunc Daemon sez keep out */
597 #if defined(AFS_DISCON_ENV)
599 /* Dirty disconnected vcache flags. */
600 #define VDisconSetTime 0x00000001 /* set time. */
601 #define VDisconSetMode 0x00000002 /* set mode. */
602 /* XXX: to be continued ? */
603 #define VDisconTrunc 0x00000020 /* truncate file. */
604 #define VDisconSetAttrMask 0x0000003F /* Masks for setattr ops. */
605 #define VDisconWriteClose 0x00000400 /* Write op on file close. */
606 #define VDisconWriteFlush 0x00000800 /* Write op on normal fsync/flush. */
607 #define VDisconWriteOsiFlush 0x00001000 /* Write op on osi flush. */
609 #define VDisconRemove 0x00002000 /* Remove vnop. */
610 #define VDisconCreate 0x00004000 /* Create vnop. */
611 #define VDisconCreated 0x00008000 /* A file that was created during
612 this resync operation */
613 #define VDisconRename 0x00010000 /* Rename vnop. */
614 #define VDisconRenameSameDir 0x00020000 /* Rename in same dir. */
616 /*... to be continued ... */
619 #if defined(AFS_CACHE_BYPASS)
620 /* vcache (file) cachingStates bits */
621 #define FCSDesireBypass 0x1 /* This file should bypass the cache */
622 #define FCSBypass 0x2 /* This file is currently NOT being cached */
623 #define FCSManuallySet 0x4 /* The bypass flags were set, or reset, manually (via pioctl)
624 and should not be overridden by the file's name */
626 /* Flag values used by the Transition routines */
627 #define TRANSChangeDesiredBit 0x1 /* The Transition routine should set or
628 * reset the FCSDesireBypass bit */
629 #define TRANSVcacheIsLocked 0x2 /* The Transition routine does not need to
630 * lock vcache (it's already locked) */
631 #define TRANSSetManualBit 0x4 /* The Transition routine should set FCSManuallySet so that
632 * filename checking does not override pioctl requests */
633 #endif /* AFS_CACHE_BYPASS */
636 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
637 #define vrefCount v->v_usecount
639 #define vrefCount v.v_count
640 #endif /* AFS_XBSD_ENV */
642 #if defined(AFS_DARWIN80_ENV)
643 #define VREFCOUNT_GT(v, y) vnode_isinuse(AFSTOV(v), (y))
644 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
645 #define VREFCOUNT(v) ((v)->vrefCount)
646 #define VREFCOUNT_GT(v, y) (AFSTOV(v)->v_usecount > (y))
647 #elif defined(AFS_LINUX24_ENV)
648 #define VREFCOUNT(v) atomic_read(&(AFSTOV(v)->v_count))
649 #define VREFCOUNT_GT(v, y) (VREFCOUNT(v)>y)
650 #define VREFCOUNT_SET(v, c) atomic_set(&(AFSTOV(v)->v_count), c)
651 #define VREFCOUNT_DEC(v) atomic_dec(&(AFSTOV(v)->v_count))
652 #define VREFCOUNT_INC(v) atomic_inc(&(AFSTOV(v)->v_count))
654 #define VREFCOUNT(v) ((v)->vrefCount)
655 #define VREFCOUNT_GT(v,y) ((v)->vrefCount > (y))
656 #define VREFCOUNT_SET(v, c) (v)->vrefCount = c;
657 #define VREFCOUNT_DEC(v) (v)->vrefCount--;
658 #define VREFCOUNT_INC(v) (v)->vrefCount++;
659 #define d_unhash(d) list_empty(&(d)->d_hash)
660 #define dget_locked(d) dget(d)
663 #define AFS_MAXDV 0x7fffffff /* largest dataversion number */
664 #ifdef AFS_64BIT_CLIENT
665 #define AFS_NOTRUNC 0x7fffffffffffffffLL /* largest positive int64 number */
666 #else /* AFS_64BIT_CLIENT */
667 #define AFS_NOTRUNC 0x7fffffff /* largest dataversion number */
668 #endif /* AFS_64BIT_CLIENT */
670 extern afs_int32 vmPageHog; /* counter for # of vnodes which are page hogs. */
672 #if defined(AFS_DARWIN80_ENV)
673 #define VTOAFS(v) ((struct vcache *)vnode_fsnode((v)))
674 #define AFSTOV(vc) ((vc)->v)
675 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
676 #define VTOAFS(v) ((struct vcache *)(v)->v_data)
677 #define AFSTOV(vc) ((vc)->v)
679 #define VTOAFS(V) ((struct vcache *)(V))
680 #define AFSTOV(V) (&(V)->v)
688 /* VCache elements which are kept on disk, and in the kernel */
693 afs_hyper_t DataVersion;
697 afs_uint16 Mode; /* XXXX Should be afs_int32 XXXX */
698 afs_uint16 LinkCount;
699 #ifdef AFS_DARWIN80_ENV
702 /* vnode type is in v.v_type */
705 struct afs_vnuniq parent;
707 /*! Truncate file to this position at the next store */
710 /*! System:AnyUser's access to this. */
716 #if defined(AFS_DISCON_ENV)
717 /*! Disconnected flags for this vcache element. */
718 afs_uint32 ddirty_flags;
719 /*! Shadow vnode + unique keep the shadow dir location. */
720 struct afs_vnuniq shadow;
721 /*! The old parent FID for renamed vnodes */
722 struct afs_vnuniq oldParent;
726 /* INVARIANTs: (vlruq.next != NULL) == (vlruq.prev != NULL)
727 * nextfree => !vlruq.next && ! vlruq.prev
728 * !(avc->nextfree) && !avc->vlruq.next => (FreeVCList == avc->nextfree)
731 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
734 struct vnode v; /* Has reference count in v.v_count */
736 struct afs_q vlruq; /* lru q next and prev */
737 #if !defined(AFS_LINUX22_ENV)
738 struct vcache *nextfree; /* next on free list (if free) */
740 struct vcache *hnext; /* Hash next */
741 struct afs_q vhashq; /* Hashed per-volume list */
742 #if defined(AFS_DISCON_ENV)
743 /*! Queue of dirty vcaches. Lock with afs_disconDirtyLock */
745 /*! Queue of vcaches with shadow entries. Lock with afs_disconDirtyLock */
746 struct afs_q shadowq;
747 /*! Queue of vcaches with dirty metadata. Locked by afs_xvcdirty */
748 struct afs_q metadirty;
749 /*! Vcaches slot number in the disk backup. Protected by tvc->lock */
753 afs_rwlock_t lock; /* The lock on the vcache contents. */
754 #if defined(AFS_SUN5_ENV)
755 /* Lock used to protect the activeV, multipage, and vstates fields.
756 * Do not try to get the vcache lock when the vlock is held */
758 #endif /* defined(AFS_SUN5_ENV) */
759 #if defined(AFS_SUN5_ENV)
763 #ifdef AFS_BOZONLOCK_ENV
764 afs_bozoLock_t pvnLock; /* see locks.x */
769 #if defined(AFS_AIX51_ENV)
777 int ownslock; /* pid of owner of excl lock, else 0 - defect 3083 */
779 #ifdef AFS_DARWIN80_ENV
781 #elif defined(AFS_DARWIN_ENV)
782 struct lock__bsd__ rwlock;
785 #if !defined(AFS_DFBSD_ENV)
790 struct VenusFid *mvid; /* Either parent dir (if root) or root (if mt pt) */
791 char *linkData; /* Link data if a symlink. */
792 afs_hyper_t flushDV; /* data version last flushed from text */
793 afs_hyper_t mapDV; /* data version last flushed from map */
794 struct server *callback; /* The callback host, if any */
795 afs_uint32 cbExpires; /* time the callback expires */
796 struct afs_q callsort; /* queue in expiry order, sort of */
797 struct axscache *Access; /* a list of cached access bits */
798 afs_int32 last_looker; /* pag/uid from last lookup here */
799 #if defined(AFS_SUN5_ENV)
801 #endif /* defined(AFS_SUN5_ENV) */
802 struct SimpleLocks *slocks;
803 short opens; /* The numbers of opens, read or write, on this file. */
804 short execsOrWriters; /* The number of execs (if < 0) or writers (if > 0) of
806 short flockCount; /* count of flock readers, or -1 if writer */
807 char mvstat; /* 0->normal, 1->mt pt, 2->root. */
809 #if defined(AFS_CACHE_BYPASS)
810 char cachingStates; /* Caching policies for this file */
811 afs_uint32 cachingTransitions; /* # of times file has flopped between caching and not */
812 #if defined(AFS_LINUX24_ENV)
813 off_t next_seq_offset; /* Next sequential offset (used by prefetch/readahead) */
815 off_t next_seq_blk_offset; /* accounted in blocks for Solaris & IRIX */
819 #if defined(AFS_SUN5_ENV)
820 afs_uint32 vstates; /* vstate bits */
821 #endif /* defined(AFS_SUN5_ENV) */
822 struct dcache *dchint;
823 struct dcache *dcreaddir; /* dcache for in-progress readdir */
824 unsigned int readdir_pid; /* pid of the thread in readdir */
825 #ifdef AFS_LINUX22_ENV
826 u_short mapcnt; /* Number of mappings of this file. */
828 #if defined(AFS_SGI_ENV)
829 daddr_t lastr; /* for read-ahead */
831 uint64_t vc_rwlockid; /* kthread owning rwlock */
833 short vc_rwlockid; /* pid of process owning rwlock */
835 short vc_locktrips; /* # of rwlock reacquisitions */
836 sema_t vc_rwlock; /* vop_rwlock for afs */
837 pgno_t mapcnt; /* # of pages mapped */
838 struct cred *cred; /* last writer's cred */
840 struct bhv_desc vc_bhv_desc; /* vnode's behavior data. */
842 #endif /* AFS_SGI_ENV */
843 afs_int32 vc_error; /* stash write error for this vnode. */
844 int xlatordv; /* Used by nfs xlator */
845 struct AFS_UCRED *uncred;
846 int asynchrony; /* num kbytes to store behind */
848 short multiPage; /* count of multi-page getpages in progress */
852 #define DONT_CHECK_MODE_BITS 0
853 #define CHECK_MODE_BITS 1
854 #define CMB_ALLOW_EXEC_AS_READ 2 /* For the NFS xlator */
856 #if defined(AFS_SGI_ENV)
857 #define AVCRWLOCK(avc) (valusema(&(avc)->vc_rwlock) <= 0)
859 /* SGI vnode rwlock macros and flags. */
860 #ifndef AFS_SGI62_ENV
861 /* The following are defined here. SGI 6.2 declares them in vnode.h */
862 #define VRWLOCK_READ 0
863 #define VRWLOCK_WRITE 1
864 #define VRWLOCK_WRITE_DIRECT 2
869 #define AFS_RWLOCK_T vrwlock_t
871 #define AFS_RWLOCK_T int
872 #endif /* AFS_SGI62_ENV */
874 #include <ksys/behavior.h>
875 #define AFS_RWLOCK(V,F) \
876 afs_rwlock(&VTOAFS(V)->vc_bhv_desc, (F));
877 #define AFS_RWUNLOCK(V,F) \
878 afs_rwunlock(&VTOAFS(V)->vc_bhv_desc, (F));
881 #define AFS_RWLOCK(V,F) afs_rwlock((vnode_t *)(V), (F) )
882 #define AFS_RWUNLOCK(V,F) afs_rwunlock((vnode_t *)(V), (F) )
884 #else /* AFS_SGI53_ENV */
885 #define AFS_RWLOCK(V,F) afs_rwlock((V))
886 #define AFS_RWUNLOCK(V,F) afs_rwunlock((V))
887 #endif /* AFS_SGI53_ENV */
888 #endif /* AFS_SGI_ENV */
892 afs_hyper_t DataVersion;
894 afs_int32 parentVnode;
895 afs_int32 parentUnique;
899 afs_int32 randomUid[CPSIZE];
900 afs_int32 callback; /* Now a pointer to 'server' struct */
902 afs_int32 randomAccess[CPSIZE];
905 short execsOrWriters;
912 afs_int32 callerAccess;
923 /* CM inititialization parameters. What CM actually used after calculations
924 * based on passed in arguments.
926 #define CMI_VERSION 1 /* increment when adding new fields. */
927 struct cm_initparams {
932 int cmi_nVolumeCaches;
933 int cmi_firstChunkSize;
934 int cmi_otherChunkSize;
935 int cmi_cacheSize; /* The original cache size, in 1K blocks. */
936 unsigned cmi_setTime:1;
937 unsigned cmi_memCache:1;
938 int spare[16 - 9]; /* size of struct is 16 * 4 = 64 bytes */
942 /*----------------------------------------------------------------------
943 * AFS Data cache definitions
945 * Each entry describes a Unix file on the local disk that is
946 * is serving as a cached copy of all or part of a Vice file.
947 * Entries live in circular queues for each hash table slot
949 * Which queue is this thing in? Good question.
950 * A struct dcache entry is in the freeDSlot queue when not associated with a cache slot (file).
951 * Otherwise, it is in the DLRU queue. The freeDSlot queue uses the lruq.next field as
952 * its "next" pointer.
954 * Cache entries in the DLRU queue are either associated with vice files, in which case
955 * they are hashed by afs_dvnextTbl and afs_dcnextTbl pointers, or they are in the freeDCList
956 * and are not associated with any vice file. This last list uses the afs_dvnextTbl pointer for
957 * its "next" pointer.
958 *----------------------------------------------------------------------*/
960 #define NULLIDX (-1) /* null index definition */
961 /* struct dcache states bits */
965 #define DWriting 8 /* file being written (used for cache validation) */
967 /* dcache data flags */
968 #define DFEntryMod 0x02 /* has entry itself been modified? */
969 #define DFFetching 0x04 /* file is currently being fetched */
971 /* dcache meta flags */
972 #define DFNextStarted 0x01 /* next chunk has been prefetched already */
973 #define DFFetchReq 0x10 /* someone is waiting for DFFetching to go on */
976 /* flags in afs_indexFlags array */
977 #define IFEverUsed 1 /* index entry has >= 1 byte of data */
978 #define IFFree 2 /* index entry in freeDCList */
979 #define IFDataMod 4 /* file needs to be written out */
980 #define IFFlag 8 /* utility flag */
981 #define IFDirtyPages 16
982 #define IFAnyPages 32
983 #define IFDiscarded 64 /* index entry in discardDCList */
986 char *in; /* input buffer */
987 char *out; /* output buffer */
988 short in_size; /* Size of input buffer <= 2K */
989 short out_size; /* Maximum size of output buffer, <= 2K */
993 * This version of afs_ioctl is required to pass in 32 bit user space
994 * pointers into a 64 bit kernel.
1005 /* CacheItems file has a header of type struct afs_fheader
1006 * (keep aligned properly). Since we already have sgi_62 clients running
1007 * with a 32 bit inode, a change is required to the header so that
1008 * they can distinguish the old 32 bit inode CacheItems file and zap it
1009 * instead of using it.
1011 struct afs_fheader {
1012 #define AFS_FHMAGIC 0x7635abaf /* uses version number */
1014 #if defined(AFS_SUN57_64BIT_ENV)
1015 #define AFS_CI_VERSION 3
1017 #define AFS_CI_VERSION 2
1020 afs_int32 firstCSize;
1021 afs_int32 otherCSize;
1024 #if defined(AFS_CACHE_VNODE_PATH) || defined(UKERNEL)
1025 typedef afs_int32 afs_ufs_dcache_id_t;
1026 #elif defined(AFS_SGI61_ENV) || defined(AFS_SUN57_64BIT_ENV)
1027 /* Using ino64_t here so that user level debugging programs compile
1028 * the size correctly.
1030 typedef ino64_t afs_ufs_dcache_id_t;
1031 #elif defined(LINUX_USE_FH)
1035 } afs_ufs_dcache_id_t;
1036 #elif defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_S390X_LINUX24_ENV)
1037 typedef long afs_ufs_dcache_id_t;
1038 #elif defined(AFS_AIX51_ENV) || defined(AFS_HPUX1123_ENV)
1039 typedef ino_t afs_ufs_dcache_id_t;
1041 typedef afs_int32 afs_ufs_dcache_id_t;
1044 typedef afs_int32 afs_mem_dcache_id_t;
1047 afs_ufs_dcache_id_t ufs;
1048 afs_mem_dcache_id_t mem;
1052 /* it does not compile outside kernel */
1054 afs_int32 fid; /* is adc->index, the cache file number */
1055 afs_dcache_id_t inode; /* is adc->f.inode, the inode number of the cac\
1058 afs_int32 accesstime;
1059 struct buffer *hashNext;
1064 #if defined(AFS_USEBUFFERS)
1067 afs_rwlock_t lock; /* the lock for this structure */
1070 /* kept on disk and in dcache entries */
1072 struct VenusFid fid; /* Fid for this file */
1073 afs_int32 modTime; /* last time this entry was modified */
1074 afs_hyper_t versionNo; /* Associated data version number */
1075 afs_int32 chunk; /* Relative chunk number */
1076 afs_dcache_id_t inode; /* Unix inode for this chunk */
1077 afs_int32 chunkBytes; /* Num bytes in this chunk */
1078 char states; /* Has this chunk been modified? */
1082 /* magic numbers to specify the cache type */
1084 #define AFS_FCACHE_TYPE_UFS 0x0
1085 #define AFS_FCACHE_TYPE_MEM 0x1
1086 #define AFS_FCACHE_TYPE_NFS 0x2
1087 #define AFS_FCACHE_TYPE_EPI 0x3
1089 /* kept in memory */
1091 struct afs_q lruq; /* Free queue for in-memory images */
1092 struct afs_q dirty; /* Queue of dirty entries that need written */
1093 afs_rwlock_t lock; /* Protects validPos, some f */
1094 afs_rwlock_t tlock; /* Atomizes updates to refCount */
1095 afs_rwlock_t mflock; /* Atomizes accesses/updates to mflags */
1096 afs_size_t validPos; /* number of valid bytes during fetch */
1097 afs_int32 index; /* The index in the CacheInfo file */
1098 short refCount; /* Associated reference count. */
1099 char dflags; /* Data flags */
1100 char mflags; /* Meta flags */
1101 struct fcache f; /* disk image */
1102 afs_int32 bucket; /* which bucket these dcache entries are in */
1106 * dcache.lock protects the actual contents of the cache file (in
1107 * f.inode), subfields of f except those noted below, dflags and
1110 * dcache.tlock is used to make atomic updates to refCount. Zero
1111 * refCount dcache entries are protected by afs_xdcache instead of
1114 * dcache.mflock is used to access and update mflags. It cannot be
1115 * held without holding the corresponding dcache.lock. Updating
1116 * mflags requires holding dcache.lock(R) and dcache.mflock(W), and
1117 * checking for mflags requires dcache.lock(R) and dcache.mflock(R).
1118 * Note that dcache.lock(W) gives you the right to update mflags,
1119 * as dcache.mflock(W) can only be held with dcache.lock(R).
1121 * dcache.index, dcache.f.fid, dcache.f.chunk and dcache.f.inode are
1122 * write-protected by afs_xdcache and read-protected by refCount.
1123 * Once an entry is referenced, these values cannot change, and if
1124 * it's on the free list (with refCount=0), it can be reused for a
1125 * different file/chunk. These values can only be written while
1126 * holding afs_xdcache(W) and allocating this dcache entry (thereby
1127 * ensuring noone else has a refCount on it).
1131 /* afs_memcache.c */
1132 struct memCacheEntry {
1133 int size; /* # of valid bytes in this entry */
1134 int dataSize; /* size of allocated data area */
1135 afs_lock_t afs_memLock;
1136 char *data; /* bytes */
1139 /* macro to mark a dcache entry as bad */
1142 (x)->f.fid.Fid.Unique = 0; \
1143 afs_indexUnique[(x)->index] = 0; \
1144 (x)->dflags |= DFEntryMod; \
1147 /* FakeOpen and Fake Close used to be real subroutines. They're only used in
1148 * sun_subr and afs_vnodeops, and they're very frequently called, so I made
1149 * them into macros. They do:
1150 * FakeOpen: fake the file being open for writing. avc->lock must be held
1151 * in write mode. Having the file open for writing is like having a DFS
1152 * write-token: you're known to have the best version of the data around,
1153 * and so the CM won't let it be overwritten by random server info.
1154 * FakeClose: undo the effects of FakeOpen, noting that we want to ensure
1155 * that a real close eventually gets done. We use CCore to achieve this if
1156 * we would end up closing the file. avc->lock must be held in write mode */
1158 #ifdef AFS_AIX_IAUTH_ENV
1159 #define CRKEEP(V, C) (V)->linkData = (char*)crdup((C))
1161 #define CRKEEP(V, C) crhold((C)); (V)->linkData = (char*)(C)
1164 #define afs_FakeOpen(avc) { avc->opens++; avc->execsOrWriters++; }
1165 #define afs_FakeClose(avc, acred) \
1166 { if (avc->execsOrWriters == 1) { \
1167 /* we're the last writer, just use CCore flag */ \
1168 avc->f.states |= CCore; /* causes close to be called later */ \
1170 /* The cred and vnode holds will be released in afs_FlushActiveVcaches */ \
1171 VN_HOLD(AFSTOV(avc)); /* So it won't disappear */ \
1172 CRKEEP(avc, acred); /* Should use a better place for the creds */ \
1175 /* we're not the last writer, let the last one do the store-back for us */ \
1177 avc->execsOrWriters--; \
1181 #define AFS_ZEROS 64 /* zero buffer */
1183 /*#define afs_DirtyPages(avc) (((avc)->f.states & CDirty) || osi_VMDirty_p((avc)))*/
1184 #define afs_DirtyPages(avc) ((avc)->f.states & CDirty)
1186 #define afs_InReadDir(avc) (((avc)->f.states & CReadDir) && (avc)->readdir_pid == MyPidxx2Pid(MyPidxx))
1188 /* The PFlush algorithm makes use of the fact that Fid.Unique is not used in
1189 below hash algorithms. Change it if need be so that flushing algorithm
1190 doesn't move things from one hash chain to another
1192 /* extern int afs_dhashsize; */
1193 #define DCHash(v, c) ((((v)->Fid.Vnode + (v)->Fid.Volume + (c))) & (afs_dhashsize-1))
1194 /*Vnode, Chunk -> Hash table index */
1195 #define DVHash(v) ((((v)->Fid.Vnode + (v)->Fid.Volume )) & (afs_dhashsize-1))
1196 /*Vnode -> Other hash table index */
1197 /* don't hash on the cell, our callback-breaking code sometimes fails to compute
1198 the cell correctly, and only scans one hash bucket */
1199 #define VCHash(fid) (((fid)->Fid.Volume + (fid)->Fid.Vnode) & (VCSIZE-1))
1200 /* Hash only on volume to speed up volume callbacks. */
1201 #define VCHashV(fid) ((fid)->Fid.Volume & (VCSIZE-1))
1203 extern struct dcache **afs_indexTable; /*Pointers to in-memory dcache entries */
1204 extern afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
1205 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
1206 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
1207 extern afs_int32 afs_cacheFiles; /*Size of afs_indexTable */
1208 extern afs_int32 afs_cacheBlocks; /*1K blocks in cache */
1209 extern afs_int32 afs_cacheStats; /*Stat entries in cache */
1210 extern struct vcache *afs_vhashT[VCSIZE]; /*Stat cache hash table */
1211 extern struct afs_q afs_vhashTV[VCSIZE]; /* cache hash table on volume */
1212 extern afs_int32 afs_initState; /*Initialization state */
1213 extern afs_int32 afs_termState; /* Termination state */
1214 extern struct VenusFid afs_rootFid; /*Root for whole file system */
1215 extern afs_int32 afs_allCBs; /* Count of callbacks */
1216 extern afs_int32 afs_oddCBs; /* Count of odd callbacks */
1217 extern afs_int32 afs_evenCBs; /* Count of even callbacks */
1218 extern afs_int32 afs_allZaps; /* Count of fid deletes */
1219 extern afs_int32 afs_oddZaps; /* Count of odd fid deletes */
1220 extern afs_int32 afs_evenZaps; /* Count of even fid deletes */
1221 extern struct brequest afs_brs[NBRS]; /* request structures */
1223 #define UHash(auid) ((auid) & (NUSERS-1))
1224 #define VHash(avol) ((avol)&(NVOLS-1))
1225 #define SHash(aserv) ((ntohl(aserv)) & (NSERVERS-1))
1226 #define FVHash(acell,avol) (((avol)+(acell)) & (NFENTRIES-1))
1228 /* Performance hack - we could replace VerifyVCache2 with the appropriate
1229 * GetVCache incantation, and could eliminate even this code from afs_UFSRead
1230 * by making intentionally invalidating quick.stamp in the various callbacks
1231 * expiration/breaking code */
1232 #ifdef AFS_DARWIN_ENV
1233 #define afs_VerifyVCache(avc, areq) \
1234 (((avc)->f.states & CStatd) ? (osi_VM_Setup(avc, 0), 0) : \
1235 afs_VerifyVCache2((avc),areq))
1237 #define afs_VerifyVCache(avc, areq) \
1238 (((avc)->f.states & CStatd) ? 0 : afs_VerifyVCache2((avc),areq))
1241 #define DO_STATS 1 /* bits used by FindVCache */
1246 /* values for flag param of afs_CheckVolumeNames */
1247 #define AFS_VOLCHECK_EXPIRED 0x1 /* volumes whose callbacks have expired */
1248 #define AFS_VOLCHECK_BUSY 0x2 /* volumes which were marked busy */
1249 #define AFS_VOLCHECK_MTPTS 0x4 /* mount point invalidation also */
1250 #define AFS_VOLCHECK_FORCE 0x8 /* do all forcibly */
1254 #define AFS_FSPORT ((unsigned short) htons(7000))
1255 #define AFS_VLPORT ((unsigned short) htons(7003))
1257 #define afs_read(avc, uio, acred, albn, abpp, nolock) \
1258 (*(afs_cacheType->vread))(avc, uio, acred, albn, abpp, nolock)
1259 #define afs_write(avc, uio, aio, acred, nolock) \
1260 (*(afs_cacheType->vwrite))(avc, uio, aio, acred, nolock)
1262 #define afs_rdwr(avc, uio, rw, io, cred) \
1263 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 0) : afs_read(avc, uio, cred, 0, 0, 0))
1264 #define afs_nlrdwr(avc, uio, rw, io, cred) \
1265 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 1) : afs_read(avc, uio, cred, 0, 0, 1))
1267 /* Cache size truncation uses the following low and high water marks:
1268 * If the cache is more than 95% full (CM_DCACHECOUNTFREEPCT), the cache
1269 * truncation daemon is awakened and will free up space until the cache is 85%
1270 * (CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT) full.
1271 * afs_UFSWrite and afs_GetDCache (when it needs to fetch data) will wait on
1272 * afs_WaitForCacheDrain if the cache is 98% (CM_WAITFORDRAINPCT) full.
1273 * afs_GetDownD wakes those processes once the cache is 95% full
1274 * (CM_CACHESIZEDRAINEDPCT).
1276 #define CM_MAXDISCARDEDCHUNKS 16 /* # of chunks */
1277 #define CM_DCACHECOUNTFREEPCT 95 /* max pct of chunks in use */
1278 #define CM_DCACHESPACEFREEPCT 90 /* max pct of space in use */
1279 #define CM_DCACHEEXTRAPCT 5 /* extra to get when freeing */
1280 #define CM_CACHESIZEDRAINEDPCT 95 /* wakeup processes when down to here. */
1281 #define CM_WAITFORDRAINPCT 98 /* sleep if cache is this full. */
1283 /* when afs_cacheBlocks is large, settle for slightly decreased precision */
1284 #define PERCENT(p, v) \
1285 ((afs_cacheBlocks & 0xffe00000) ? ((v) / 100 * (p)) : ((p) * (v) / 100))
1287 #define afs_CacheIsTooFull() \
1288 (afs_blocksUsed - afs_blocksDiscarded > \
1289 PERCENT(CM_DCACHECOUNTFREEPCT, afs_cacheBlocks) || \
1290 afs_freeDCCount - afs_discardDCCount < \
1291 PERCENT(100 - CM_DCACHECOUNTFREEPCT, afs_cacheFiles))
1293 /* Handy max length of a numeric string. */
1294 #define CVBS 12 /* max afs_int32 is 2^32 ~ 4*10^9, +1 for NULL, +luck */
1296 #define refpanic(foo) if (afs_norefpanic) \
1297 { printf( foo ); afs_norefpanic++;} else osi_Panic( foo )
1300 ** these are defined in the AIX source code sys/fs_locks.h but are not
1301 ** defined anywhere in the /usr/include directory
1303 #if defined(AFS_AIX41_ENV)
1304 #define VN_LOCK(vp) simple_lock(&(vp)->v_lock)
1305 #define VN_UNLOCK(vp) simple_unlock(&(vp)->v_lock)
1308 /* get a file's serial number from a vnode */
1309 #ifndef afs_vnodeToInumber
1310 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1311 #define afs_vnodeToInumber(V) VnodeToIno(V)
1313 #ifdef AFS_DECOSF_ENV
1314 #define afs_vnodeToInumber(V) osi_vnodeToInumber(V)
1316 #define afs_vnodeToInumber(V) (VTOI(V)->i_number)
1317 #endif /* AFS_DECOSF_ENV */
1318 #endif /* AFS_SGI62_ENV */
1321 /* get a file's device number from a vnode */
1322 #ifndef afs_vnodeToDev
1323 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1324 #define afs_vnodeToDev(V) VnodeToDev(V)
1325 #elif defined(AFS_DECOSF_ENV)
1326 #define afs_vnodeToDev(V) osi_vnodeToDev(V)
1328 #define afs_vnodeToDev(V) (VTOI(V)->i_dev)
1333 /* Note: this should agree with the definition in kdump.c */
1334 #if defined(AFS_OSF_ENV)
1335 #if !defined(UKERNEL)
1336 #define AFS_USEBUFFERS 1
1340 #if !defined(UKERNEL) && !defined(HAVE_STRUCT_BUF)
1341 /* declare something so that prototypes don't flip out */
1342 /* appears struct buf stuff is only actually passed around as a pointer,
1343 except with libuafs, in which case it is actually defined */
1348 /* fakestat support: opaque storage for afs_EvalFakeStat to remember
1349 * what vcache should be released.
1351 struct afs_fakestat_state {
1355 struct vcache *root_vp;
1358 extern int afs_fakestat_enable;
1359 #endif /* _AFS_H_ */