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 QInit(q) ((q)->prev = (q)->next = (q))
192 #define QAdd(q,e) ((e)->next = (q)->next, (e)->prev = (q), \
193 (q)->next->prev = (e), (q)->next = (e))
194 #define QRemove(e) ((e)->next->prev = (e)->prev, (e)->prev->next = (e)->next, (e)->prev = NULL, (e)->next = NULL)
195 #define QNext(e) ((e)->next)
196 #define QPrev(e) ((e)->prev)
197 #define QEmpty(q) ((q)->prev == (q))
198 /* this one takes q1 and sticks it on the end of q2 - that is, the other end, not the end
199 * that things are added onto. q1 shouldn't be empty, it's silly */
200 #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))
202 /* Given a pointer to an afs_q within a structure, go back to the address of
203 * the parent structure
206 #define QEntry(queue, structure, member) \
207 ((structure *)((char *)(queue)-(char *)(&((structure *)NULL)->member)))
209 /* And implement operations for individual lists in terms of the above macro */
211 #define QTOV(e) QEntry(e, struct vcache, vlruq)
212 #define QTOC(e) QEntry(e, struct cell, lruq)
213 #define QTOVH(e) QEntry(e, struct vcache, vhashq)
216 afs_int32 uid; /* user id making the request */
217 afs_int32 busyCount; /* how many busies we've seen so far */
218 afs_int32 flags; /* things like O_SYNC, O_NONBLOCK go here */
219 char initd; /* if non-zero, Error fields meaningful */
220 char accessError; /* flags for overriding error return code */
221 char volumeError; /* encountered a missing or busy volume */
222 char networkError; /* encountered network problems */
223 char permWriteError; /* fileserver returns permenent error. */
224 char tokenError; /* a token error other than expired. */
225 char idleError; /* the server idled too long */
226 char skipserver[MAXHOSTS];
231 /* structure linked off of a server to keep track of queued returned
232 * callbacks. Sent asynchronously when we run a little low on free dudes.
235 struct afs_cbr **pprev;
236 struct afs_cbr *next;
238 struct afs_cbr **hash_pprev;
239 struct afs_cbr *hash_next;
244 /* cellinfo file magic number */
245 #define AFS_CELLINFO_MAGIC 0xf32817cd
248 #define CNoSUID 0x02 /* disable suid bit for this cell */
249 #define CLinkedCell4 0x04 /* reserved for ADDCELL2 pioctl */
250 #define CNoAFSDB 0x08 /* never bother trying AFSDB */
251 #define CHasVolRef 0x10 /* volumes were referenced */
252 #define CLinkedCell 0x20 /* has a linked cell in lcellp */
255 struct afs_q lruq; /* lru q next and prev */
256 char *cellName; /* char string name of cell */
257 afs_int32 cellIndex; /* sequence number */
258 afs_int32 cellNum; /* semi-permanent cell number */
259 struct server *cellHosts[MAXCELLHOSTS]; /* volume *location* hosts */
260 struct cell *lcellp; /* Associated linked cell */
261 u_short fsport; /* file server port */
262 u_short vlport; /* volume server port */
263 short states; /* state flags */
264 time_t timeout; /* data expire time, if non-zero */
265 struct cell_name *cnamep; /* pointer to our cell_name */
266 afs_rwlock_t lock; /* protects cell data */
267 unsigned char cellHandle[16]; /* deterministic handle for this cell */
271 struct cell_name *next;
278 struct cell_alias *next;
284 #define afs_PutCell(cellp, locktype)
286 /* the unixuser flag bit definitions */
287 #define UHasTokens 1 /* are the st and ct fields valid (ever set)? */
288 #define UTokensBad 2 /* are tokens bad? */
289 #define UPrimary 4 /* on iff primary identity */
290 #define UNeedsReset 8 /* needs afs_ResetAccessCache call done */
291 #define UPAGCounted 16 /* entry seen during PAG search (for stats) */
292 #define UNFSGetCreds 32 /* getting creds for NFS client */
293 /* A flag used by afs_GCPAGs to keep track of
294 * which entries in afs_users need to be deleted.
295 * The lifetime of its presence in the table is the
296 * lifetime of the afs_GCPAGs function.
298 #define TMP_UPAGNotReferenced 128
300 /* values for afs_gcpags */
301 enum { AFS_GCPAGS_NOTCOMPILED = 0, AFS_GCPAGS_OK =
302 1, AFS_GCPAGS_USERDISABLED, AFS_GCPAGS_EPROC0, AFS_GCPAGS_EPROCN,
303 AFS_GCPAGS_EEQPID, AFS_GCPAGS_EINEXACT, AFS_GCPAGS_EPROCEND,
304 AFS_GCPAGS_EPROCWALK, AFS_GCPAGS_ECREDWALK, AFS_GCPAGS_EPIDCHECK,
305 AFS_GCPAGS_ENICECHECK
308 extern afs_int32 afs_gcpags;
309 extern afs_int32 afs_gcpags_procsize;
310 extern afs_int32 afs_bkvolpref;
311 extern char afs_cachebasedir[1024];
312 extern afs_int32 afs_numcachefiles;
313 extern afs_int32 afs_numfilesperdir;
316 struct unixuser *next; /* next hash pointer */
317 afs_int32 uid; /* search based on uid and cell */
319 afs_int32 vid; /* corresponding vice id in specified cell */
320 short refCount; /* reference count for allocation */
321 char states; /* flag info */
322 afs_int32 tokenTime; /* last time tokens were set, used for timing out conn data */
323 afs_int32 stLen; /* ticket length (if kerberos, includes kvno at head) */
324 char *stp; /* pointer to ticket itself */
325 struct ClearToken ct;
326 struct afs_exporter *exporter; /* more info about the exporter for the remote user */
327 void *cellinfo; /* pointer to cell info (PAG manager only) */
331 /* Per-connection block. */
332 struct afs_conn *next; /* Next dude same server. */
333 struct unixuser *user; /* user validated with respect to. */
334 struct rx_connection *id; /* RPC connid. */
335 struct srvAddr *srvr; /* server associated with this conn */
336 short refCount; /* reference count for allocation */
337 unsigned short port; /* port associated with this connection */
338 char forceConnectFS; /* Should we try again with these tokens? */
344 /* Fid comparison routines */
345 #define FidCmp(a,b) ((a)->Fid.Unique != (b)->Fid.Unique \
346 || (a)->Fid.Vnode != (b)->Fid.Vnode \
347 || (a)->Fid.Volume != (b)->Fid.Volume \
348 || (a)->Cell != (b)->Cell)
350 #define FidMatches(afid,tvc) ((tvc)->fid.Fid.Vnode == (afid)->Fid.Vnode && \
351 (tvc)->fid.Fid.Volume == (afid)->Fid.Volume && \
352 (tvc)->fid.Cell == (afid)->Cell && \
353 ( (tvc)->fid.Fid.Unique == (afid)->Fid.Unique || \
354 (!(afid)->Fid.Unique && ((tvc)->states & CUnique))))
358 #define SRVADDR_ISDOWN 0x20 /* same as SRVR_ISDOWN */
359 #define SRVADDR_NOUSE 0x40 /* Don't use this srvAddr */
361 struct srvAddr *next_bkt; /* next item in hash bucket */
362 struct srvAddr *next_sa; /* another interface on same host */
363 struct server *server; /* back to parent */
364 struct afs_conn *conns; /* All user connections to this server */
365 afs_int32 sa_ip; /* Host addr in network byte order */
366 u_short sa_iprank; /* indiv ip address priority */
367 u_short sa_portal; /* port addr in network byte order */
372 * Values used in the flags field of the server structure below.
374 * AFS_SERVER_FLAG_ACTIVATED Has the server ever had a user connection
375 * associated with it?
377 #define AFS_SERVER_FLAG_ACTIVATED 0x01
378 #define SNO_LHOSTS 0x04
379 #define SYES_LHOSTS 0x08
380 #define SVLSRV_UUID 0x10
381 #define SRVR_ISDOWN 0x20
382 #define SRVR_MULTIHOMED 0x40
383 #define SRVR_ISGONE 0x80
384 #define SNO_INLINEBULK 0x100
385 #define SNO_64BIT 0x200
387 #define afs_serverSetNo64Bit(s) ((s)->srvr->server->flags |= SNO_64BIT)
388 #define afs_serverHasNo64Bit(s) ((s)->srvr->server->flags & SNO_64BIT)
394 afs_int32 addr_uniquifier;
398 struct srvAddr haddr;
401 #define sr_uuid _suid._srvUuid.suuid
402 #define sr_addr_uniquifier _suid._srvUuid.addr_uniquifier
403 #define sr_host _suid._srvId.haddr.ip
404 #define sr_portal _suid._srvId.haddr.portal
405 #define sr_rank _suid._srvId.haddr.ip_rank
406 #define sr_flags _suid._srvId.haddr.flags
407 #define sr_conns _suid._srvId.haddr.conns
408 struct server *next; /* Ptr to next server in hash chain */
409 struct cell *cell; /* Cell in which this host resides */
410 struct afs_cbr *cbrs; /* Return list of callbacks */
411 afs_int32 activationTime; /* Time when this record was first activated */
412 afs_int32 lastDowntimeStart; /* Time when last downtime incident began */
413 afs_int32 numDowntimeIncidents; /* # (completed) downtime incidents */
414 afs_int32 sumOfDowntimes; /* Total downtime experienced, in seconds */
415 struct srvAddr *addr;
416 afs_uint32 flags; /* Misc flags */
419 #define afs_PutServer(servp, locktype)
421 /* structs for some pioctls - these are (or should be)
429 struct sprefrequest_33 {
430 unsigned short offset;
431 unsigned short num_servers;
435 struct sprefrequest { /* new struct for 3.4 */
436 unsigned short offset;
437 unsigned short num_servers;
438 unsigned short flags;
443 unsigned short next_offset;
444 unsigned short num_servers;
445 struct spref servers[1]; /* we overrun this array intentionally... */
449 unsigned short flags;
450 unsigned short num_servers;
451 struct spref servers[1]; /* we overrun this array intentionally... */
453 /* struct for GAG pioctl
456 afs_uint32 showflags, logflags, logwritethruflag, spare[3];
457 unsigned char spare2[128];
461 #define logwritethruON 1
464 afs_int32 rx_initReceiveWindow, rx_maxReceiveWindow, rx_initSendWindow,
465 rx_maxSendWindow, rxi_nSendFrags, rxi_nRecvFrags, rxi_OrphanFragSize;
466 afs_int32 rx_maxReceiveSize, rx_MyMaxSendSize;
467 afs_uint32 spare[21];
470 /* struct for checkservers */
481 /* state bits for volume */
482 #define VRO 1 /* volume is readonly */
483 #define VRecheck 2 /* recheck volume info with server */
484 #define VBackup 4 /* is this a backup volume? */
485 #define VForeign 8 /* this is a non-afs volume */
486 #define VResort 16 /* server order was rearranged, sort when able */
487 #define VMoreReps 32 /* This volume has more replicas than we are */
488 /* keeping track of now -- check with VLDB */
490 enum repstate { not_busy, end_not_busy = 6, rd_busy, rdwr_busy, offline };
493 /* One structure per volume, describing where the volume is located
494 * and where its mount points are. */
495 struct volume *next; /* Next volume in hash list. */
496 afs_int32 cell; /* the cell in which the volume resides */
497 afs_rwlock_t lock; /* the lock for this structure */
498 afs_int32 volume; /* This volume's ID number. */
499 char *name; /* This volume's name, or 0 if unknown */
500 struct server *serverHost[MAXHOSTS]; /* servers serving this volume */
501 enum repstate status[MAXHOSTS]; /* busy, offline, etc */
502 struct VenusFid dotdot; /* dir to access as .. */
503 struct VenusFid mtpoint; /* The mount point for this volume. */
504 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
507 afs_int32 rwVol; /* For r/o vols, original read/write volume. */
508 afs_int32 accessTime; /* last time we used it */
509 afs_int32 vtix; /* volume table index */
510 afs_int32 copyDate; /* copyDate field, for tracking vol releases */
511 afs_int32 expireTime; /* for per-volume callbacks... */
512 short refCount; /* reference count for allocation */
513 char states; /* here for alignment reasons */
516 #define afs_PutVolume(av, locktype) ((av)->refCount--)
518 /* format of an entry in volume info file */
520 afs_int32 cell; /* cell for this entry */
521 afs_int32 volume; /* volume */
522 afs_int32 next; /* has index */
523 struct VenusFid dotdot; /* .. value */
524 struct VenusFid mtpoint; /* mt point's fid */
525 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
529 struct SimpleLocks *next;
531 afs_int32 boff, eoff;
533 #if defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
538 /* vcache state bits */
539 #define CStatd 0x00000001 /* has this file ever been stat'd? */
540 #define CBackup 0x00000002 /* file is on a backup volume */
541 #define CRO 0x00000004 /* is it on a read-only volume */
542 #define CMValid 0x00000008 /* is the mount point info valid? */
543 #define CCore 0x00000010 /* storing a core file, needed since we don't get an open */
544 #define CDirty 0x00000020 /* file has been modified since first open (... O_RDWR) */
545 #define CSafeStore 0x00000040 /* close must wait for store to finish (should be in fd) */
546 #define CMAPPED 0x00000080 /* Mapped files; primarily used by SunOS 4.0.x */
547 #define CNSHARE 0x00000100 /* support O_NSHARE semantics */
548 #define CLied 0x00000200
549 #define CTruth 0x00000400
551 #define CWired 0x00000800 /* OSF hack only */
553 #ifdef AFS_DARWIN80_ENV
554 #define CDeadVnode 0x00000800
556 #ifdef AFS_DARWIN_ENV
557 #define CUBCinit 0x00000800
559 #define CWRITE_IGN 0x00000800 /* Next OS hack only */
563 #define CUnique 0x00001000 /* vc's uniquifier - latest unifiquier for fid */
564 #define CForeign 0x00002000 /* this is a non-afs vcache */
565 #define CReadDir 0x00004000 /* readdir in progress */
566 #define CUnlinked 0x00010000
567 #define CBulkStat 0x00020000 /* loaded by a bulk stat, and not ref'd since */
568 #define CUnlinkedDel 0x00040000
569 #define CVFlushed 0x00080000
570 #define CCore1 0x00100000 /* osf1 core file; not same as CCore above */
571 #ifdef AFS_LINUX22_ENV
572 #define CPageWrite 0x00200000 /* to detect vm deadlock - linux */
574 #define CWritingUFS 0x00200000 /* to detect vm deadlock - used by sgi */
576 #define CCreating 0x00400000 /* avoid needless store after open truncate */
577 #define CPageHog 0x00800000 /* AIX - dumping large cores is a page hog. */
578 #define CDCLock 0x02000000 /* Vnode lock held over call to GetDownD */
579 #define CBulkFetching 0x04000000 /* stats are being fetched by bulk stat */
580 #define CExtendedFile 0x08000000 /* extended file via ftruncate call. */
581 #define CVInit 0x10000000 /* being initialized */
583 /* vcache vstate bits */
584 #define VRevokeWait 0x1
585 #define VPageCleaning 0x2 /* Solaris - Cache Trunc Daemon sez keep out */
587 #if defined(AFS_DISCON_ENV)
589 /* Dirty disconnected vcache flags. */
590 #define VDisconSetTime 0x00000001 /* set time. */
591 #define VDisconSetMode 0x00000002 /* set mode. */
592 /* XXX: to be continued ? */
593 #define VDisconTrunc 0x00000020 /* truncate file. */
594 #define VDisconSetAttrMask 0x0000003F /* Masks for setattr ops. */
595 #define VDisconWriteClose 0x00000400 /* Write op on file close. */
596 #define VDisconWriteFlush 0x00000800 /* Write op on normal fsync/flush. */
597 #define VDisconWriteOsiFlush 0x00001000 /* Write op on osi flush. */
599 #define VDisconRemove 0x00002000 /* Remove vnop. */
600 #define VDisconCreate 0x00004000 /* Create vnop. */
601 #define VDisconCreated 0x00008000 /* A file that was created during
602 this resync operation */
603 #define VDisconRename 0x00010000 /* Rename vnop. */
604 #define VDisconRenameSameDir 0x00020000 /* Rename in same dir. */
606 /*... to be continued ... */
609 #if defined(AFS_CACHE_BYPASS)
610 /* vcache (file) cachingStates bits */
611 #define FCSDesireBypass 0x1 /* This file should bypass the cache */
612 #define FCSBypass 0x2 /* This file is currently NOT being cached */
613 #define FCSManuallySet 0x4 /* The bypass flags were set, or reset, manually (via pioctl)
614 and should not be overridden by the file's name */
616 /* Flag values used by the Transition routines */
617 #define TRANSChangeDesiredBit 0x1 /* The Transition routine should set or
618 * reset the FCSDesireBypass bit */
619 #define TRANSVcacheIsLocked 0x2 /* The Transition routine does not need to
620 * lock vcache (it's already locked) */
621 #define TRANSSetManualBit 0x4 /* The Transition routine should set FCSManuallySet so that
622 * filename checking does not override pioctl requests */
623 #endif /* AFS_CACHE_BYPASS */
626 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
627 #define vrefCount v->v_usecount
629 #define vrefCount v.v_count
630 #endif /* AFS_XBSD_ENV */
632 #if defined(AFS_DARWIN80_ENV)
633 #define VREFCOUNT_GT(v, y) vnode_isinuse(AFSTOV(v), (y))
634 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
635 #define VREFCOUNT(v) ((v)->vrefCount)
636 #define VREFCOUNT_GT(v, y) (AFSTOV(v)->v_usecount > (y))
637 #elif defined(AFS_LINUX24_ENV)
638 #define VREFCOUNT(v) atomic_read(&(AFSTOV(v)->v_count))
639 #define VREFCOUNT_GT(v, y) (VREFCOUNT(v)>y)
640 #define VREFCOUNT_SET(v, c) atomic_set(&(AFSTOV(v)->v_count), c)
641 #define VREFCOUNT_DEC(v) atomic_dec(&(AFSTOV(v)->v_count))
642 #define VREFCOUNT_INC(v) atomic_inc(&(AFSTOV(v)->v_count))
644 #define VREFCOUNT(v) ((v)->vrefCount)
645 #define VREFCOUNT_GT(v,y) ((v)->vrefCount > (y))
646 #define VREFCOUNT_SET(v, c) (v)->vrefCount = c;
647 #define VREFCOUNT_DEC(v) (v)->vrefCount--;
648 #define VREFCOUNT_INC(v) (v)->vrefCount++;
649 #define d_unhash(d) list_empty(&(d)->d_hash)
650 #define dget_locked(d) dget(d)
653 #define AFS_MAXDV 0x7fffffff /* largest dataversion number */
654 #ifdef AFS_64BIT_CLIENT
655 #define AFS_NOTRUNC 0x7fffffffffffffffLL /* largest positive int64 number */
656 #else /* AFS_64BIT_CLIENT */
657 #define AFS_NOTRUNC 0x7fffffff /* largest dataversion number */
658 #endif /* AFS_64BIT_CLIENT */
660 extern afs_int32 vmPageHog; /* counter for # of vnodes which are page hogs. */
662 #if defined(AFS_DARWIN80_ENV)
663 #define VTOAFS(v) ((struct vcache *)vnode_fsnode((v)))
664 #define AFSTOV(vc) ((vc)->v)
665 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
666 #define VTOAFS(v) ((struct vcache *)(v)->v_data)
667 #define AFSTOV(vc) ((vc)->v)
669 #define VTOAFS(V) ((struct vcache *)(V))
670 #define AFSTOV(V) (&(V)->v)
673 /* INVARIANTs: (vlruq.next != NULL) == (vlruq.prev != NULL)
674 * nextfree => !vlruq.next && ! vlruq.prev
675 * !(avc->nextfree) && !avc->vlruq.next => (FreeVCList == avc->nextfree)
678 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_HAS_ALLOC_INODE))
681 struct vnode v; /* Has reference count in v.v_count */
683 struct afs_q vlruq; /* lru q next and prev */
684 #if !defined(AFS_LINUX22_ENV)
685 struct vcache *nextfree; /* next on free list (if free) */
687 struct vcache *hnext; /* Hash next */
688 struct afs_q vhashq; /* Hashed per-volume list */
689 #if defined(AFS_DISCON_ENV)
690 /*! Queue of dirty vcaches. Lock with afs_disconDirtyLock */
692 /*! Queue of vcaches with shadow entries. Lock with afs_disconDirtyLock */
693 struct afs_q shadowq;
694 /*! Disconnected flags for this vcache element. */
695 uint32_t ddirty_flags;
696 /*! Shadow vnode + unique keep the shadow dir location. */
699 /*! The old parent FID for renamed vnodes. */
701 afs_uint32 oldUnique;
707 afs_hyper_t DataVersion;
711 afs_uint16 Mode; /* XXXX Should be afs_int32 XXXX */
712 afs_uint16 LinkCount;
713 #ifdef AFS_DARWIN80_ENV
716 /* vnode type is in v.v_type */
719 afs_rwlock_t lock; /* The lock on the vcache contents. */
720 #if defined(AFS_SUN5_ENV)
721 /* Lock used to protect the activeV, multipage, and vstates fields.
722 * Do not try to get the vcache lock when the vlock is held */
724 #endif /* defined(AFS_SUN5_ENV) */
725 #if defined(AFS_SUN5_ENV)
729 #ifdef AFS_BOZONLOCK_ENV
730 afs_bozoLock_t pvnLock; /* see locks.x */
735 #if defined(AFS_AIX51_ENV)
743 int ownslock; /* pid of owner of excl lock, else 0 - defect 3083 */
745 #ifdef AFS_DARWIN80_ENV
747 #elif defined(AFS_DARWIN_ENV)
748 struct lock__bsd__ rwlock;
753 afs_int32 parentVnode; /* Parent dir, if a file. */
754 afs_int32 parentUnique;
755 struct VenusFid *mvid; /* Either parent dir (if root) or root (if mt pt) */
756 char *linkData; /* Link data if a symlink. */
757 afs_hyper_t flushDV; /* data version last flushed from text */
758 afs_hyper_t mapDV; /* data version last flushed from map */
759 afs_size_t truncPos; /* truncate file to this position at next store */
760 struct server *callback; /* The callback host, if any */
761 afs_uint32 cbExpires; /* time the callback expires */
762 struct afs_q callsort; /* queue in expiry order, sort of */
763 struct axscache *Access; /* a list of cached access bits */
764 afs_int32 anyAccess; /* System:AnyUser's access to this. */
765 afs_int32 last_looker; /* pag/uid from last lookup here */
766 #if defined(AFS_SUN5_ENV)
768 #endif /* defined(AFS_SUN5_ENV) */
769 struct SimpleLocks *slocks;
770 short opens; /* The numbers of opens, read or write, on this file. */
771 short execsOrWriters; /* The number of execs (if < 0) or writers (if > 0) of
773 short flockCount; /* count of flock readers, or -1 if writer */
774 char mvstat; /* 0->normal, 1->mt pt, 2->root. */
776 #if defined(AFS_CACHE_BYPASS)
777 char cachingStates; /* Caching policies for this file */
778 afs_uint32 cachingTransitions; /* # of times file has flopped between caching and not */
779 #if defined(AFS_LINUX24_ENV)
780 off_t next_seq_offset; /* Next sequential offset (used by prefetch/readahead) */
782 off_t next_seq_blk_offset; /* accounted in blocks for Solaris & IRIX */
786 afs_uint32 states; /* state bits */
787 #if defined(AFS_SUN5_ENV)
788 afs_uint32 vstates; /* vstate bits */
789 #endif /* defined(AFS_SUN5_ENV) */
790 struct dcache *dchint;
791 struct dcache *dcreaddir; /* dcache for in-progress readdir */
792 unsigned int readdir_pid; /* pid of the thread in readdir */
793 #ifdef AFS_LINUX22_ENV
794 u_short mapcnt; /* Number of mappings of this file. */
796 #if defined(AFS_SGI_ENV)
797 daddr_t lastr; /* for read-ahead */
799 uint64_t vc_rwlockid; /* kthread owning rwlock */
801 short vc_rwlockid; /* pid of process owning rwlock */
803 short vc_locktrips; /* # of rwlock reacquisitions */
804 sema_t vc_rwlock; /* vop_rwlock for afs */
805 pgno_t mapcnt; /* # of pages mapped */
806 struct cred *cred; /* last writer's cred */
808 struct bhv_desc vc_bhv_desc; /* vnode's behavior data. */
810 #endif /* AFS_SGI_ENV */
811 afs_int32 vc_error; /* stash write error for this vnode. */
812 int xlatordv; /* Used by nfs xlator */
813 struct AFS_UCRED *uncred;
814 int asynchrony; /* num kbytes to store behind */
816 short multiPage; /* count of multi-page getpages in progress */
820 #define DONT_CHECK_MODE_BITS 0
821 #define CHECK_MODE_BITS 1
822 #define CMB_ALLOW_EXEC_AS_READ 2 /* For the NFS xlator */
824 #if defined(AFS_SGI_ENV)
825 #define AVCRWLOCK(avc) (valusema(&(avc)->vc_rwlock) <= 0)
827 /* SGI vnode rwlock macros and flags. */
828 #ifndef AFS_SGI62_ENV
829 /* The following are defined here. SGI 6.2 declares them in vnode.h */
830 #define VRWLOCK_READ 0
831 #define VRWLOCK_WRITE 1
832 #define VRWLOCK_WRITE_DIRECT 2
837 #define AFS_RWLOCK_T vrwlock_t
839 #define AFS_RWLOCK_T int
840 #endif /* AFS_SGI62_ENV */
842 #include <ksys/behavior.h>
843 #define AFS_RWLOCK(V,F) \
844 afs_rwlock(&VTOAFS(V)->vc_bhv_desc, (F));
845 #define AFS_RWUNLOCK(V,F) \
846 afs_rwunlock(&VTOAFS(V)->vc_bhv_desc, (F));
849 #define AFS_RWLOCK(V,F) afs_rwlock((vnode_t *)(V), (F) )
850 #define AFS_RWUNLOCK(V,F) afs_rwunlock((vnode_t *)(V), (F) )
852 #else /* AFS_SGI53_ENV */
853 #define AFS_RWLOCK(V,F) afs_rwlock((V))
854 #define AFS_RWUNLOCK(V,F) afs_rwunlock((V))
855 #endif /* AFS_SGI53_ENV */
856 #endif /* AFS_SGI_ENV */
860 afs_hyper_t DataVersion;
862 afs_int32 parentVnode;
863 afs_int32 parentUnique;
867 afs_int32 randomUid[CPSIZE];
868 afs_int32 callback; /* Now a pointer to 'server' struct */
870 afs_int32 randomAccess[CPSIZE];
873 short execsOrWriters;
880 afs_int32 callerAccess;
891 /* CM inititialization parameters. What CM actually used after calculations
892 * based on passed in arguments.
894 #define CMI_VERSION 1 /* increment when adding new fields. */
895 struct cm_initparams {
900 int cmi_nVolumeCaches;
901 int cmi_firstChunkSize;
902 int cmi_otherChunkSize;
903 int cmi_cacheSize; /* The original cache size, in 1K blocks. */
904 unsigned cmi_setTime:1;
905 unsigned cmi_memCache:1;
906 int spare[16 - 9]; /* size of struct is 16 * 4 = 64 bytes */
910 /*----------------------------------------------------------------------
911 * AFS Data cache definitions
913 * Each entry describes a Unix file on the local disk that is
914 * is serving as a cached copy of all or part of a Vice file.
915 * Entries live in circular queues for each hash table slot
917 * Which queue is this thing in? Good question.
918 * A struct dcache entry is in the freeDSlot queue when not associated with a cache slot (file).
919 * Otherwise, it is in the DLRU queue. The freeDSlot queue uses the lruq.next field as
920 * its "next" pointer.
922 * Cache entries in the DLRU queue are either associated with vice files, in which case
923 * they are hashed by afs_dvnextTbl and afs_dcnextTbl pointers, or they are in the freeDCList
924 * and are not associated with any vice file. This last list uses the afs_dvnextTbl pointer for
925 * its "next" pointer.
926 *----------------------------------------------------------------------*/
928 #define NULLIDX (-1) /* null index definition */
929 /* struct dcache states bits */
933 #define DWriting 8 /* file being written (used for cache validation) */
935 /* dcache data flags */
936 #define DFEntryMod 0x02 /* has entry itself been modified? */
937 #define DFFetching 0x04 /* file is currently being fetched */
939 /* dcache meta flags */
940 #define DFNextStarted 0x01 /* next chunk has been prefetched already */
941 #define DFFetchReq 0x10 /* someone is waiting for DFFetching to go on */
944 /* flags in afs_indexFlags array */
945 #define IFEverUsed 1 /* index entry has >= 1 byte of data */
946 #define IFFree 2 /* index entry in freeDCList */
947 #define IFDataMod 4 /* file needs to be written out */
948 #define IFFlag 8 /* utility flag */
949 #define IFDirtyPages 16
950 #define IFAnyPages 32
951 #define IFDiscarded 64 /* index entry in discardDCList */
954 char *in; /* input buffer */
955 char *out; /* output buffer */
956 short in_size; /* Size of input buffer <= 2K */
957 short out_size; /* Maximum size of output buffer, <= 2K */
961 * This version of afs_ioctl is required to pass in 32 bit user space
962 * pointers into a 64 bit kernel.
973 /* CacheItems file has a header of type struct afs_fheader
974 * (keep aligned properly). Since we already have sgi_62 clients running
975 * with a 32 bit inode, a change is required to the header so that
976 * they can distinguish the old 32 bit inode CacheItems file and zap it
977 * instead of using it.
980 #define AFS_FHMAGIC 0x7635abaf /* uses version number */
982 #if defined(AFS_SUN57_64BIT_ENV)
983 #define AFS_CI_VERSION 3
985 #define AFS_CI_VERSION 2
988 afs_int32 firstCSize;
989 afs_int32 otherCSize;
992 #if defined(AFS_SGI61_ENV) || defined(AFS_SUN57_64BIT_ENV)
993 /* Using ino64_t here so that user level debugging programs compile
994 * the size correctly.
996 #define afs_inode_t ino64_t
998 #if defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_S390X_LINUX24_ENV)
999 #define afs_inode_t long
1001 #if defined(AFS_AIX51_ENV) || defined(AFS_HPUX1123_ENV)
1002 #define afs_inode_t ino_t
1004 #define afs_inode_t afs_int32
1011 /* it does not compile outside kernel */
1013 afs_int32 fid; /* is adc->index, the cache file number */
1014 afs_inode_t inode; /* is adc->f.inode, the inode number of the cac\
1016 #if defined(LINUX_USE_FH)
1017 struct fid fh; /* Opaque file handle */
1018 int fh_type; /* Opaque file handle type */
1021 afs_int32 accesstime;
1022 struct buffer *hashNext;
1027 #if defined(AFS_USEBUFFERS)
1030 afs_rwlock_t lock; /* the lock for this structure */
1033 /* kept on disk and in dcache entries */
1035 struct VenusFid fid; /* Fid for this file */
1036 afs_int32 modTime; /* last time this entry was modified */
1037 afs_hyper_t versionNo; /* Associated data version number */
1038 afs_int32 chunk; /* Relative chunk number */
1039 afs_inode_t inode; /* Unix inode for this chunk */
1040 afs_int32 chunkBytes; /* Num bytes in this chunk */
1041 char states; /* Has this chunk been modified? */
1042 #if defined(LINUX_USE_FH)
1043 struct fid fh; /* File handle */
1044 int fh_type; /* File handle type */
1049 /* magic numbers to specify the cache type */
1051 #define AFS_FCACHE_TYPE_UFS 0x0
1052 #define AFS_FCACHE_TYPE_MEM 0x1
1053 #define AFS_FCACHE_TYPE_NFS 0x2
1054 #define AFS_FCACHE_TYPE_EPI 0x3
1056 /* kept in memory */
1058 struct afs_q lruq; /* Free queue for in-memory images */
1059 struct afs_q dirty; /* Queue of dirty entries that need written */
1060 afs_rwlock_t lock; /* Protects validPos, some f */
1061 afs_rwlock_t tlock; /* Atomizes updates to refCount */
1062 afs_rwlock_t mflock; /* Atomizes accesses/updates to mflags */
1063 afs_size_t validPos; /* number of valid bytes during fetch */
1064 afs_int32 index; /* The index in the CacheInfo file */
1065 short refCount; /* Associated reference count. */
1066 char dflags; /* Data flags */
1067 char mflags; /* Meta flags */
1068 struct fcache f; /* disk image */
1069 afs_int32 bucket; /* which bucket these dcache entries are in */
1073 * dcache.lock protects the actual contents of the cache file (in
1074 * f.inode), subfields of f except those noted below, dflags and
1077 * dcache.tlock is used to make atomic updates to refCount. Zero
1078 * refCount dcache entries are protected by afs_xdcache instead of
1081 * dcache.mflock is used to access and update mflags. It cannot be
1082 * held without holding the corresponding dcache.lock. Updating
1083 * mflags requires holding dcache.lock(R) and dcache.mflock(W), and
1084 * checking for mflags requires dcache.lock(R) and dcache.mflock(R).
1085 * Note that dcache.lock(W) gives you the right to update mflags,
1086 * as dcache.mflock(W) can only be held with dcache.lock(R).
1088 * dcache.index, dcache.f.fid, dcache.f.chunk and dcache.f.inode are
1089 * write-protected by afs_xdcache and read-protected by refCount.
1090 * Once an entry is referenced, these values cannot change, and if
1091 * it's on the free list (with refCount=0), it can be reused for a
1092 * different file/chunk. These values can only be written while
1093 * holding afs_xdcache(W) and allocating this dcache entry (thereby
1094 * ensuring noone else has a refCount on it).
1098 /* afs_memcache.c */
1099 struct memCacheEntry {
1100 int size; /* # of valid bytes in this entry */
1101 int dataSize; /* size of allocated data area */
1102 afs_lock_t afs_memLock;
1103 char *data; /* bytes */
1106 /* macro to mark a dcache entry as bad */
1109 (x)->f.fid.Fid.Unique = 0; \
1110 afs_indexUnique[(x)->index] = 0; \
1111 (x)->dflags |= DFEntryMod; \
1114 /* FakeOpen and Fake Close used to be real subroutines. They're only used in
1115 * sun_subr and afs_vnodeops, and they're very frequently called, so I made
1116 * them into macros. They do:
1117 * FakeOpen: fake the file being open for writing. avc->lock must be held
1118 * in write mode. Having the file open for writing is like having a DFS
1119 * write-token: you're known to have the best version of the data around,
1120 * and so the CM won't let it be overwritten by random server info.
1121 * FakeClose: undo the effects of FakeOpen, noting that we want to ensure
1122 * that a real close eventually gets done. We use CCore to achieve this if
1123 * we would end up closing the file. avc->lock must be held in write mode */
1125 #ifdef AFS_AIX_IAUTH_ENV
1126 #define CRKEEP(V, C) (V)->linkData = (char*)crdup((C))
1128 #define CRKEEP(V, C) crhold((C)); (V)->linkData = (char*)(C)
1131 #define afs_FakeOpen(avc) { avc->opens++; avc->execsOrWriters++; }
1132 #define afs_FakeClose(avc, acred) \
1133 { if (avc->execsOrWriters == 1) { \
1134 /* we're the last writer, just use CCore flag */ \
1135 avc->states |= CCore; /* causes close to be called later */ \
1137 /* The cred and vnode holds will be released in afs_FlushActiveVcaches */ \
1138 VN_HOLD(AFSTOV(avc)); /* So it won't disappear */ \
1139 CRKEEP(avc, acred); /* Should use a better place for the creds */ \
1142 /* we're not the last writer, let the last one do the store-back for us */ \
1144 avc->execsOrWriters--; \
1148 #define AFS_ZEROS 64 /* zero buffer */
1150 /*#define afs_DirtyPages(avc) (((avc)->states & CDirty) || osi_VMDirty_p((avc)))*/
1151 #define afs_DirtyPages(avc) ((avc)->states & CDirty)
1153 #define afs_InReadDir(avc) (((avc)->states & CReadDir) && (avc)->readdir_pid == MyPidxx)
1155 /* The PFlush algorithm makes use of the fact that Fid.Unique is not used in
1156 below hash algorithms. Change it if need be so that flushing algorithm
1157 doesn't move things from one hash chain to another
1159 /* extern int afs_dhashsize; */
1160 #define DCHash(v, c) ((((v)->Fid.Vnode + (v)->Fid.Volume + (c))) & (afs_dhashsize-1))
1161 /*Vnode, Chunk -> Hash table index */
1162 #define DVHash(v) ((((v)->Fid.Vnode + (v)->Fid.Volume )) & (afs_dhashsize-1))
1163 /*Vnode -> Other hash table index */
1164 /* don't hash on the cell, our callback-breaking code sometimes fails to compute
1165 the cell correctly, and only scans one hash bucket */
1166 #define VCHash(fid) (((fid)->Fid.Volume + (fid)->Fid.Vnode) & (VCSIZE-1))
1167 /* Hash only on volume to speed up volume callbacks. */
1168 #define VCHashV(fid) ((fid)->Fid.Volume & (VCSIZE-1))
1170 extern struct dcache **afs_indexTable; /*Pointers to in-memory dcache entries */
1171 extern afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
1172 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
1173 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
1174 extern afs_int32 afs_cacheFiles; /*Size of afs_indexTable */
1175 extern afs_int32 afs_cacheBlocks; /*1K blocks in cache */
1176 extern afs_int32 afs_cacheStats; /*Stat entries in cache */
1177 extern struct vcache *afs_vhashT[VCSIZE]; /*Stat cache hash table */
1178 extern struct afs_q afs_vhashTV[VCSIZE]; /* cache hash table on volume */
1179 extern afs_int32 afs_initState; /*Initialization state */
1180 extern afs_int32 afs_termState; /* Termination state */
1181 extern struct VenusFid afs_rootFid; /*Root for whole file system */
1182 extern afs_int32 afs_allCBs; /* Count of callbacks */
1183 extern afs_int32 afs_oddCBs; /* Count of odd callbacks */
1184 extern afs_int32 afs_evenCBs; /* Count of even callbacks */
1185 extern afs_int32 afs_allZaps; /* Count of fid deletes */
1186 extern afs_int32 afs_oddZaps; /* Count of odd fid deletes */
1187 extern afs_int32 afs_evenZaps; /* Count of even fid deletes */
1188 extern struct brequest afs_brs[NBRS]; /* request structures */
1190 #define UHash(auid) ((auid) & (NUSERS-1))
1191 #define VHash(avol) ((avol)&(NVOLS-1))
1192 #define SHash(aserv) ((ntohl(aserv)) & (NSERVERS-1))
1193 #define FVHash(acell,avol) (((avol)+(acell)) & (NFENTRIES-1))
1195 /* Performance hack - we could replace VerifyVCache2 with the appropriate
1196 * GetVCache incantation, and could eliminate even this code from afs_UFSRead
1197 * by making intentionally invalidating quick.stamp in the various callbacks
1198 * expiration/breaking code */
1199 #ifdef AFS_DARWIN_ENV
1200 #define afs_VerifyVCache(avc, areq) \
1201 (((avc)->states & CStatd) ? (osi_VM_Setup(avc, 0), 0) : \
1202 afs_VerifyVCache2((avc),areq))
1204 #define afs_VerifyVCache(avc, areq) \
1205 (((avc)->states & CStatd) ? 0 : afs_VerifyVCache2((avc),areq))
1208 #define DO_STATS 1 /* bits used by FindVCache */
1213 /* values for flag param of afs_CheckVolumeNames */
1214 #define AFS_VOLCHECK_EXPIRED 0x1 /* volumes whose callbacks have expired */
1215 #define AFS_VOLCHECK_BUSY 0x2 /* volumes which were marked busy */
1216 #define AFS_VOLCHECK_MTPTS 0x4 /* mount point invalidation also */
1217 #define AFS_VOLCHECK_FORCE 0x8 /* do all forcibly */
1221 #define AFS_FSPORT ((unsigned short) htons(7000))
1222 #define AFS_VLPORT ((unsigned short) htons(7003))
1224 #define afs_read(avc, uio, acred, albn, abpp, nolock) \
1225 (*(afs_cacheType->vread))(avc, uio, acred, albn, abpp, nolock)
1226 #define afs_write(avc, uio, aio, acred, nolock) \
1227 (*(afs_cacheType->vwrite))(avc, uio, aio, acred, nolock)
1229 #define afs_rdwr(avc, uio, rw, io, cred) \
1230 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 0) : afs_read(avc, uio, cred, 0, 0, 0))
1231 #define afs_nlrdwr(avc, uio, rw, io, cred) \
1232 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 1) : afs_read(avc, uio, cred, 0, 0, 1))
1234 /* Cache size truncation uses the following low and high water marks:
1235 * If the cache is more than 95% full (CM_DCACHECOUNTFREEPCT), the cache
1236 * truncation daemon is awakened and will free up space until the cache is 85%
1237 * (CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT) full.
1238 * afs_UFSWrite and afs_GetDCache (when it needs to fetch data) will wait on
1239 * afs_WaitForCacheDrain if the cache is 98% (CM_WAITFORDRAINPCT) full.
1240 * afs_GetDownD wakes those processes once the cache is 95% full
1241 * (CM_CACHESIZEDRAINEDPCT).
1243 #define CM_MAXDISCARDEDCHUNKS 16 /* # of chunks */
1244 #define CM_DCACHECOUNTFREEPCT 95 /* max pct of chunks in use */
1245 #define CM_DCACHESPACEFREEPCT 90 /* max pct of space in use */
1246 #define CM_DCACHEEXTRAPCT 5 /* extra to get when freeing */
1247 #define CM_CACHESIZEDRAINEDPCT 95 /* wakeup processes when down to here. */
1248 #define CM_WAITFORDRAINPCT 98 /* sleep if cache is this full. */
1250 /* when afs_cacheBlocks is large, settle for slightly decreased precision */
1251 #define PERCENT(p, v) \
1252 ((afs_cacheBlocks & 0xffe00000) ? ((v) / 100 * (p)) : ((p) * (v) / 100))
1254 #define afs_CacheIsTooFull() \
1255 (afs_blocksUsed - afs_blocksDiscarded > \
1256 PERCENT(CM_DCACHECOUNTFREEPCT, afs_cacheBlocks) || \
1257 afs_freeDCCount - afs_discardDCCount < \
1258 PERCENT(100 - CM_DCACHECOUNTFREEPCT, afs_cacheFiles))
1260 /* Handy max length of a numeric string. */
1261 #define CVBS 12 /* max afs_int32 is 2^32 ~ 4*10^9, +1 for NULL, +luck */
1263 #define refpanic(foo) if (afs_norefpanic) \
1264 { printf( foo ); afs_norefpanic++;} else osi_Panic( foo )
1267 ** these are defined in the AIX source code sys/fs_locks.h but are not
1268 ** defined anywhere in the /usr/include directory
1270 #if defined(AFS_AIX41_ENV)
1271 #define VN_LOCK(vp) simple_lock(&(vp)->v_lock)
1272 #define VN_UNLOCK(vp) simple_unlock(&(vp)->v_lock)
1275 /* get a file's serial number from a vnode */
1276 #ifndef afs_vnodeToInumber
1277 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1278 #define afs_vnodeToInumber(V) VnodeToIno(V)
1280 #ifdef AFS_DECOSF_ENV
1281 #define afs_vnodeToInumber(V) osi_vnodeToInumber(V)
1283 #define afs_vnodeToInumber(V) (VTOI(V)->i_number)
1284 #endif /* AFS_DECOSF_ENV */
1285 #endif /* AFS_SGI62_ENV */
1288 /* get a file's device number from a vnode */
1289 #ifndef afs_vnodeToDev
1290 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1291 #define afs_vnodeToDev(V) VnodeToDev(V)
1292 #elif defined(AFS_DECOSF_ENV)
1293 #define afs_vnodeToDev(V) osi_vnodeToDev(V)
1295 #define afs_vnodeToDev(V) (VTOI(V)->i_dev)
1300 /* Note: this should agree with the definition in kdump.c */
1301 #if defined(AFS_OSF_ENV)
1302 #if !defined(UKERNEL)
1303 #define AFS_USEBUFFERS 1
1307 #if !defined(UKERNEL) && !defined(HAVE_STRUCT_BUF)
1308 /* declare something so that prototypes don't flip out */
1309 /* appears struct buf stuff is only actually passed around as a pointer,
1310 except with libuafs, in which case it is actually defined */
1315 /* fakestat support: opaque storage for afs_EvalFakeStat to remember
1316 * what vcache should be released.
1318 struct afs_fakestat_state {
1322 struct vcache *root_vp;
1325 extern int afs_fakestat_enable;
1326 #endif /* _AFS_H_ */