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>
17 #include <afs/afs_consts.h>
19 #include "afs/afs_args.h"
20 #include "afs/afs_consts.h"
24 * afs_fsfragsize cannot be less than 1023, or some cache-tracking
25 * calculations will be incorrect (since we track cache usage in kb).
26 * Some filesystems have fundamental blocksizes less than 1k, and
27 * normally we would tune afs_fsfragsize to be fragsize-1, but we must
28 * make sure to check that afs_fsfragsize does not go below this value.
30 #define AFS_MIN_FRAGSIZE 1023
32 /* Upper bound on number of iovecs out uio routines will deal with. */
33 #define AFS_MAXIOVCNT 16
36 extern int afs_shuttingdown;
39 * Macros to uniquely identify the AFS vfs struct
41 #define AFS_VFSMAGIC 0x1234
42 #if defined(AFS_SUN5_ENV) || defined(AFS_HPUX90_ENV) || defined(AFS_LINUX20_ENV)
43 #define AFS_VFSFSID 99
45 #if defined(AFS_SGI_ENV)
46 #define AFS_VFSFSID afs_fstype
48 #define AFS_VFSFSID AFS_MOUNT_AFS
52 /* Moved from VNOPS/afs_vnop_flocks so can be used in prototypes */
53 #if defined(AFS_HPUX102_ENV)
54 #define AFS_FLOCK k_flock
56 #if defined(AFS_SUN5_ENV) || (defined(AFS_LINUX24_ENV) && !(defined(AFS_LINUX26_ENV) && defined(AFS_LINUX_64BIT_KERNEL)))
57 #define AFS_FLOCK flock64
59 #define AFS_FLOCK flock
60 #endif /* AFS_SUN65_ENV */
61 #endif /* AFS_HPUX102_ENV */
63 /* The following are various levels of afs debugging */
64 #define AFSDEB_GENERAL 1 /* Standard debugging */
65 #define AFSDEB_NETWORK 2 /* low level afs networking */
66 #define AFSDEB_RX 4 /* RX debugging */
67 #define AFSDEB_VNLAYER 8 /* interface layer to AFS (aixops, gfsops, etc) */
69 /* generic undefined vice id */
72 /* The basic defines for the Andrew file system
73 better keep things powers of two so "& (foo-1)" hack works for masking bits */
74 #define NBRS 15 /* max number of queued daemon requests */
75 #define NUSERS 16 /* hash table size for unixuser table */
76 #define NSERVERS 16 /* hash table size for server table */
77 #define NVOLS 64 /* hash table size for volume table */
78 #define NFENTRIES 256 /* hash table size for disk volume table */
79 #define VCSIZE 1024 /* stat cache hash table size */
80 #define DCSIZE 512 /* disk cache hash table size */
81 #define CBRSIZE 512 /* call back returns hash table size */
82 #define PIGGYSIZE 1350 /* max piggyback size */
83 #define MAXVOLS 128 /* max vols we can store */
84 #define MAXSYSNAME 128 /* max sysname (i.e. @sys) size */
85 #define MAXNUMSYSNAMES 32 /* max that current constants allow */
86 #define NOTOKTIMEOUT (2*3600) /* time after which to timeout conns sans tokens */
87 #define NOPAG 0xffffffff
91 #define AFS_MAXCBRSCALL 32 /* max to return in a given call (must be <= AFSCBMAX) */
92 #define AFS_SALLOC_LOW_WATER 250 /* Min free blocks before allocating more */
93 #define AFS_LRALLOCSIZ 4096 /* "Large" allocated size */
95 #define AFS_NRXPACKETS 80
96 #define AFS_RXDEADTIME 50
97 #define AFS_HARDDEADTIME 120
98 #define AFS_IDLEDEADTIME 1200
99 #define AFS_IDLEDEADTIME_REP 180 /* more than fs's cb dead time */
100 #define AFS_BLKBITS 12
101 #define AFS_BLKSIZE (1 << AFS_BLKBITS)
103 extern afs_int32 afs_rx_deadtime;
104 extern afs_int32 afs_rx_harddead;
105 extern afs_int32 afs_rx_idledead;
106 extern afs_int32 afs_rx_idledead_rep;
108 struct sysname_info {
111 signed char index, allocked;
114 /* flags to use with AFSOP_CACHEINIT */
115 #define AFSCALL_INIT_MEMCACHE 0x1 /* use a memory-based cache */
117 /* below here used only for kernel procedures */
119 /* Store synchrony flags - SYNC means that data should be forced to server's
120 * disk immediately upon completion. */
123 #define AFS_VMSYNC_INVAL 2 /* sync and invalidate pages */
124 #define AFS_LASTSTORE 4
125 #define AFS_VMSYNC 8 /* sync pages but do not invalidate */
127 /* background request structure */
130 #define BOP_NOOP 0 /* leave 0 unused */
131 #define BOP_FETCH 1 /* parm1 is chunk to get */
132 #define BOP_STORE 2 /* parm1 is chunk to store */
133 #define BOP_PATH 3 /* parm1 is path, parm2 is chunk to fetch */
134 #define BOP_FETCH_NOCACHE 4 /* parms are: vnode ptr, offset, segment ptr, addr, cred ptr */
135 #ifdef AFS_DARWIN_ENV
136 #define BOP_MOVE 5 /* ptr1 afs_uspc_param ptr2 sname ptr3 dname */
138 #define BOP_PARTIAL_STORE 6 /* parm1 is chunk to store */
140 #define B_DONTWAIT 1 /* On failure return; don't wait */
142 /* protocol is: refCount is incremented by user to take block out of free pool.
143 Next, BSTARTED is set when daemon finds request. This prevents
144 other daemons from picking up the same request. Finally, when
145 request is done, refCount is zeroed. BDONE and BWAIT are used by
146 dudes waiting for operation to proceed to a certain point before returning.
148 #define BSTARTED 1 /* request picked up by a daemon */
149 #define BUVALID 2 /* code is valid (store) */
150 #define BUWAIT 4 /* someone is waiting for BUVALID */
152 struct vcache *vc; /* vnode to use, with vrefcount bumped */
153 afs_ucred_t *cred; /* credentials to use for operation */
154 afs_size_t size_parm[BPARMS]; /* random parameters */
155 void *ptr_parm[BPARMS]; /* pointer parameters */
156 afs_int32 code; /* return code */
157 short refCount; /* use counter for this structure */
158 char opcode; /* what to do (store, fetch, etc) */
159 char flags; /* free, etc */
160 afs_int32 ts; /* counter "timestamp" */
168 afs_int32 AuthHandle;
169 char HandShakeKey[8];
171 afs_int32 BeginTimestamp;
172 afs_int32 EndTimestamp;
176 afs_int32 Cell; /* better sun packing if at end of structure */
180 /* 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!) */
183 afs_int32 CellAndUnique;
186 /* The actual number of bytes in the SmallFid, not the sizeof struct. */
187 #define SIZEOF_SMALLFID 10
192 * Circular queues, implemented with pointers. Structures may contain as many
193 * queues as required, which may be located at any point within the structure,
194 * providing the QEntry macro is used to translate between a queue pointer, and
195 * the address of its containing structure
203 #define QZero(e) ((e)->prev = (e)->next = NULL)
204 #define QInit(q) ((q)->prev = (q)->next = (q))
205 #define QAdd(q,e) ((e)->next = (q)->next, (e)->prev = (q), \
206 (q)->next->prev = (e), (q)->next = (e))
207 #define QRemove(e) ((e)->next->prev = (e)->prev, (e)->prev->next = (e)->next, (e)->prev = NULL, (e)->next = NULL)
208 #define QNext(e) ((e)->next)
209 #define QPrev(e) ((e)->prev)
210 #define QEmpty(q) ((q)->prev == (q))
211 /* this one takes q1 and sticks it on the end of q2 - that is, the other end, not the end
212 * that things are added onto. q1 shouldn't be empty, it's silly */
213 #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))
215 /* Given a pointer to an afs_q within a structure, go back to the address of
216 * the parent structure
219 #define QEntry(queue, structure, member) \
220 ((structure *)((char *)(queue)-(char *)(&((structure *)NULL)->member)))
222 /* And implement operations for individual lists in terms of the above macro */
224 #define QTOV(e) QEntry(e, struct vcache, vlruq)
225 #define QTOC(e) QEntry(e, struct cell, lruq)
226 #define QTOVH(e) QEntry(e, struct vcache, vhashq)
229 * List of free slot numbers
231 struct afs_slotlist {
233 struct afs_slotlist *next;
237 afs_int32 uid; /* user id making the request */
238 afs_int32 busyCount; /* how many busies we've seen so far */
239 afs_int32 flags; /* things like O_SYNC, O_NONBLOCK go here */
240 char initd; /* if non-zero, Error fields meaningful */
241 char accessError; /* flags for overriding error return code */
242 char volumeError; /* encountered a missing or busy volume */
243 char networkError; /* encountered network problems */
244 char permWriteError; /* fileserver returns permenent error. */
245 char tokenError; /* a token error other than expired. */
246 char idleError; /* the server idled too long */
247 char skipserver[AFS_MAXHOSTS];
248 afs_int32 lasterror[AFS_MAXHOSTS];
253 /* structure linked off of a server to keep track of queued returned
254 * callbacks. Sent asynchronously when we run a little low on free dudes.
257 struct afs_cbr **pprev;
258 struct afs_cbr *next;
260 struct afs_cbr **hash_pprev;
261 struct afs_cbr *hash_next;
266 #ifdef AFS_LINUX22_ENV
267 /* On Linux, we have to be able to allocate the storage for this using
268 * kmalloc, as otherwise we may deadlock. So, it needs to be able to fit
271 # define AFS_NCBRS PAGE_SIZE/sizeof(struct afs_cbr)
273 # define AFS_NCBRS 1024 /* max # of call back return entries */
276 /* cellinfo file magic number */
277 #define AFS_CELLINFO_MAGIC 0xf32817cd
280 #define CNoSUID 0x02 /* disable suid bit for this cell */
281 #define CLinkedCell4 0x04 /* reserved for ADDCELL2 pioctl */
282 #define CNoAFSDB 0x08 /* never bother trying AFSDB */
283 #define CHasVolRef 0x10 /* volumes were referenced */
284 #define CLinkedCell 0x20 /* has a linked cell in lcellp */
285 #define CHush 0x40 /* don't display until referenced */
288 struct afs_q lruq; /* lru q next and prev */
289 char *cellName; /* char string name of cell */
290 afs_int32 cellIndex; /* sequence number */
291 afs_int32 cellNum; /* semi-permanent cell number */
292 struct server *cellHosts[AFS_MAXCELLHOSTS]; /* volume *location* hosts */
293 struct cell *lcellp; /* Associated linked cell */
294 u_short fsport; /* file server port */
295 u_short vlport; /* volume server port */
296 short states; /* state flags */
297 time_t timeout; /* data expire time, if non-zero */
298 struct cell_name *cnamep; /* pointer to our cell_name */
299 afs_rwlock_t lock; /* protects cell data */
300 unsigned char cellHandle[16]; /* deterministic handle for this cell */
304 struct cell_name *next;
311 struct cell_alias *next;
317 #define afs_PutCell(cellp, locktype)
319 /* the unixuser flag bit definitions */
320 #define UHasTokens 1 /* are the st and ct fields valid (ever set)? */
321 #define UTokensBad 2 /* are tokens bad? */
322 #define UPrimary 4 /* on iff primary identity */
323 #define UNeedsReset 8 /* needs afs_ResetAccessCache call done */
324 #define UPAGCounted 16 /* entry seen during PAG search (for stats) */
325 #define UNFSGetCreds 32 /* getting creds for NFS client */
326 /* A flag used by afs_GCPAGs to keep track of
327 * which entries in afs_users need to be deleted.
328 * The lifetime of its presence in the table is the
329 * lifetime of the afs_GCPAGs function.
331 #define TMP_UPAGNotReferenced 128
333 /* unixuser notify events */
334 #define UTokensObtained 1
335 #define UTokensDropped 2
337 /* values for afs_gcpags */
338 enum { AFS_GCPAGS_NOTCOMPILED = 0, AFS_GCPAGS_OK =
339 1, AFS_GCPAGS_USERDISABLED, AFS_GCPAGS_EPROC0, AFS_GCPAGS_EPROCN,
340 AFS_GCPAGS_EEQPID, AFS_GCPAGS_EINEXACT, AFS_GCPAGS_EPROCEND,
341 AFS_GCPAGS_EPROCWALK, AFS_GCPAGS_ECREDWALK, AFS_GCPAGS_EPIDCHECK,
342 AFS_GCPAGS_ENICECHECK
345 extern afs_int32 afs_gcpags;
346 extern afs_int32 afs_gcpags_procsize;
347 extern afs_int32 afs_bkvolpref;
348 extern char afs_cachebasedir[1024];
349 extern afs_int32 afs_numcachefiles;
350 extern afs_int32 afs_numfilesperdir;
355 struct ClearToken clearToken;
359 struct rxkadToken rxkad;
363 struct tokenJar *next;
365 union tokenUnion content;
369 struct unixuser *next; /* next hash pointer */
370 afs_int32 uid; /* search based on uid and cell */
372 afs_int32 viceId; /* Optional viced ID corresponding to current tokens */
373 short refCount; /* reference count for allocation */
374 char states; /* flag info */
375 afs_int32 tokenTime; /* last time tokens were set, used for timing out conn data */
376 struct tokenJar *tokens;
377 struct afs_exporter *exporter; /* more info about the exporter for the remote user */
378 void *cellinfo; /* pointer to cell info (PAG manager only) */
382 #define CVEC_LEN 3 /* per-user connection pool */
384 struct sa_conn_vector;
385 typedef struct sa_conn_vector * p_sa_conn_vector; /* forward decl */
387 #define CONN_REPLICATED 0x1
392 char forceConnectFS; /* Should we try again with these tokens? */
393 struct rx_connection *id; /* RPC connid */
394 struct sa_conn_vector *parent; /* the con_vector which contains us */
397 /* An sa_conn_vector replaces the erstwhile list of conn
398 structures maintained by the cache manager. The sa_conn_vector
399 contains a C array of connections which, if non-zero, represent
400 connections to AFS servers.
403 struct sa_conn_vector {
404 /* linked-list machinery */
405 struct sa_conn_vector *next;
407 /* AFS conn-identifying info */
408 struct unixuser *user; /* user validated with respect to. */
409 struct srvAddr *srvr; /* server associated with this conn */
410 short refCount; /* reference count for allocation */
411 unsigned short port; /* port associated with this connection */
414 /* next connection to return when all in cvec are fully utilized */
417 /* connections vector */
418 struct afs_conn cvec[CVEC_LEN];
423 /* Fid comparison routines */
424 #define FidCmp(a,b) ((a)->Fid.Unique != (b)->Fid.Unique \
425 || (a)->Fid.Vnode != (b)->Fid.Vnode \
426 || (a)->Fid.Volume != (b)->Fid.Volume \
427 || (a)->Cell != (b)->Cell)
429 #define FidMatches(afid,tvc) ((tvc)->f.fid.Fid.Vnode == (afid)->Fid.Vnode && \
430 (tvc)->f.fid.Fid.Volume == (afid)->Fid.Volume && \
431 (tvc)->f.fid.Cell == (afid)->Cell && \
432 ( (tvc)->f.fid.Fid.Unique == (afid)->Fid.Unique || \
433 (!(afid)->Fid.Unique && ((tvc)->f.states & CUnique))))
437 #define SRVADDR_ISDOWN 0x20 /* same as SRVR_ISDOWN */
438 #define SRVADDR_NOUSE 0x40 /* Don't use this srvAddr */
441 struct srvAddr *next_bkt; /* next item in hash bucket */
442 struct srvAddr *next_sa; /* another interface on same host */
443 struct server *server; /* back to parent */
444 struct sa_conn_vector *conns; /* All user connections to this server */
445 struct afs_conn *natping;
446 afs_int32 sa_ip; /* Host addr in network byte order */
447 u_short sa_iprank; /* indiv ip address priority */
448 u_short sa_portal; /* port addr in network byte order */
453 * Values used in the flags field of the server structure below.
455 * AFS_SERVER_FLAG_ACTIVATED Has the server ever had a user connection
456 * associated with it?
458 #define AFS_SERVER_FLAG_ACTIVATED 0x01
459 #define SNO_LHOSTS 0x04
460 #define SYES_LHOSTS 0x08
461 #define SVLSRV_UUID 0x10
462 #define SRVR_ISDOWN 0x20
463 #define SRVR_MULTIHOMED 0x40
464 #define SRVR_ISGONE 0x80
465 #define SNO_INLINEBULK 0x100
466 #define SNO_64BIT 0x200
467 #define SCAPS_KNOWN 0x400
469 #define SRV_CAPABILITIES(ts) \
470 { if ( !(ts->flags & SCAPS_KNOWN)) afs_GetCapabilities(ts); ts->capabilities; }
472 #define afs_serverSetNo64Bit(s) (((struct sa_conn_vector*)(s)->parent)->srvr->server->flags |= SNO_64BIT)
473 #define afs_serverHasNo64Bit(s) (((struct sa_conn_vector*)(s)->parent)->srvr->server->flags & SNO_64BIT)
479 afs_int32 addr_uniquifier;
483 struct srvAddr haddr;
486 #define sr_uuid _suid._srvUuid.suuid
487 #define sr_addr_uniquifier _suid._srvUuid.addr_uniquifier
488 #define sr_host _suid._srvId.haddr.ip
489 #define sr_portal _suid._srvId.haddr.portal
490 #define sr_rank _suid._srvId.haddr.ip_rank
491 #define sr_flags _suid._srvId.haddr.flags
492 #define sr_conns _suid._srvId.haddr.conns
493 struct server *next; /* Ptr to next server in hash chain */
494 struct cell *cell; /* Cell in which this host resides */
495 struct afs_cbr *cbrs; /* Return list of callbacks */
496 afs_int32 activationTime; /* Time when this record was first activated */
497 afs_int32 lastDowntimeStart; /* Time when last downtime incident began */
498 afs_int32 numDowntimeIncidents; /* # (completed) downtime incidents */
499 afs_int32 sumOfDowntimes; /* Total downtime experienced, in seconds */
500 struct srvAddr *addr;
501 afs_uint32 flags; /* Misc flags */
502 afs_int32 capabilities;
505 #define afs_PutServer(servp, locktype)
507 /* structs for some pioctls - these are (or should be)
515 struct sprefrequest_33 {
516 unsigned short offset;
517 unsigned short num_servers;
521 struct sprefrequest { /* new struct for 3.4 */
522 unsigned short offset;
523 unsigned short num_servers;
524 unsigned short flags;
529 unsigned short next_offset;
530 unsigned short num_servers;
531 struct spref servers[1]; /* we overrun this array intentionally... */
535 unsigned short flags;
536 unsigned short num_servers;
537 struct spref servers[1]; /* we overrun this array intentionally... */
539 /* struct for GAG pioctl
542 afs_uint32 showflags, logflags, logwritethruflag, spare[3];
543 unsigned char spare2[128];
547 #define logwritethruON 1
550 afs_int32 rx_initReceiveWindow, rx_maxReceiveWindow, rx_initSendWindow,
551 rx_maxSendWindow, rxi_nSendFrags, rxi_nRecvFrags, rxi_OrphanFragSize;
552 afs_int32 rx_maxReceiveSize, rx_MyMaxSendSize;
553 afs_uint32 spare[21];
556 /* struct for checkservers */
567 /* state bits for volume */
568 #define VRO 1 /* volume is readonly */
569 #define VRecheck 2 /* recheck volume info with server */
570 #define VBackup 4 /* is this a backup volume? */
571 #define VForeign 8 /* this is a non-afs volume */
572 #define VPartVisible 16 /* Volume's partition is visible on the client */
573 #define VHardMount 32 /* we are hard-mount waiting for the vol */
575 enum repstate { not_busy, end_not_busy = 6, rd_busy, rdwr_busy, offline };
578 /* One structure per volume, describing where the volume is located
579 * and where its mount points are. */
580 struct volume *next; /* Next volume in hash list. */
581 afs_int32 cell; /* the cell in which the volume resides */
582 afs_rwlock_t lock; /* the lock for this structure */
583 afs_int32 volume; /* This volume's ID number. */
584 char *name; /* This volume's name, or 0 if unknown */
585 struct server *serverHost[AFS_MAXHOSTS]; /* servers serving this volume */
586 enum repstate status[AFS_MAXHOSTS]; /* busy, offline, etc */
587 struct VenusFid dotdot; /* dir to access as .. */
588 struct VenusFid mtpoint; /* The mount point for this volume. */
589 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
592 afs_int32 rwVol; /* For r/o vols, original read/write volume. */
593 afs_int32 accessTime; /* last time we used it */
594 afs_int32 vtix; /* volume table index */
595 afs_int32 copyDate; /* copyDate field, for tracking vol releases */
596 afs_int32 expireTime; /* for per-volume callbacks... */
597 short refCount; /* reference count for allocation */
598 char states; /* here for alignment reasons */
601 #define afs_PutVolume(av, locktype) ((av)->refCount--)
603 /* format of an entry in volume info file */
605 afs_int32 cell; /* cell for this entry */
606 afs_int32 volume; /* volume */
607 afs_int32 next; /* has index */
608 struct VenusFid dotdot; /* .. value */
609 struct VenusFid mtpoint; /* mt point's fid */
610 afs_int32 rootVnode, rootUnique; /* Volume's root fid */
614 struct SimpleLocks *next;
616 afs_int32 boff, eoff;
618 #if defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
623 /* vcache state bits */
624 #define CStatd 0x00000001 /* has this file ever been stat'd? */
625 #define CBackup 0x00000002 /* file is on a backup volume */
626 #define CRO 0x00000004 /* is it on a read-only volume */
627 #define CMValid 0x00000008 /* is the mount point info valid? */
628 #define CCore 0x00000010 /* storing a core file, needed since we don't get an open */
629 #define CDirty 0x00000020 /* file has been modified since first open (... O_RDWR) */
630 #define CSafeStore 0x00000040 /* close must wait for store to finish (should be in fd) */
631 #define CMAPPED 0x00000080 /* Mapped files; primarily used by SunOS 4.0.x */
632 #define CNSHARE 0x00000100 /* support O_NSHARE semantics */
633 #define CLied 0x00000200
634 #define CTruth 0x00000400
636 #if defined(AFS_DARWIN80_ENV)
637 #define CDeadVnode 0x00000800
638 #elif defined(AFS_DARWIN_ENV)
639 #define CUBCinit 0x00000800
641 #define CWRITE_IGN 0x00000800 /* Next OS hack only */
644 #define CUnique 0x00001000 /* vc's uniquifier - latest unifiquier for fid */
645 #define CForeign 0x00002000 /* this is a non-afs vcache */
646 #define CReadDir 0x00004000 /* readdir in progress */
647 #define CUnlinked 0x00010000
648 #define CBulkStat 0x00020000 /* loaded by a bulk stat, and not ref'd since */
649 #define CUnlinkedDel 0x00040000
650 #define CVFlushed 0x00080000
651 #ifdef AFS_LINUX22_ENV
652 #define CPageWrite 0x00200000 /* to detect vm deadlock - linux */
653 #elif defined(AFS_SGI_ENV)
654 #define CWritingUFS 0x00200000 /* to detect vm deadlock - used by sgi */
655 #elif defined(AFS_DARWIN80_ENV)
656 #define CEvent 0x00200000 /* to preclude deadlock when sending events */
658 #define CCreating 0x00400000 /* avoid needless store after open truncate */
659 #define CPageHog 0x00800000 /* AIX - dumping large cores is a page hog. */
660 #define CDCLock 0x02000000 /* Vnode lock held over call to GetDownD */
661 #define CBulkFetching 0x04000000 /* stats are being fetched by bulk stat */
662 #define CExtendedFile 0x08000000 /* extended file via ftruncate call. */
663 #define CVInit 0x10000000 /* being initialized */
664 #define CMetaDirty 0x20000000 /* vnode meta-data needs to be flushed */
665 #define CPartVisible 0x40000000 /* fileserver partition visible on client */
667 /* vcache vstate bits */
668 #define VRevokeWait 0x1
669 #define VPageCleaning 0x2 /* Solaris - Cache Trunc Daemon sez keep out */
671 /* Dirty disconnected vcache flags. */
672 #define VDisconSetTime 0x00000001 /* set time. */
673 #define VDisconSetMode 0x00000002 /* set mode. */
674 /* XXX: to be continued ? */
675 #define VDisconTrunc 0x00000020 /* truncate file. */
676 #define VDisconSetAttrMask 0x0000003F /* Masks for setattr ops. */
677 #define VDisconWriteClose 0x00000400 /* Write op on file close. */
678 #define VDisconWriteFlush 0x00000800 /* Write op on normal fsync/flush. */
679 #define VDisconWriteOsiFlush 0x00001000 /* Write op on osi flush. */
681 #define VDisconRemove 0x00002000 /* Remove vnop. */
682 #define VDisconCreate 0x00004000 /* Create vnop. */
683 #define VDisconCreated 0x00008000 /* A file that was created during
684 this resync operation */
685 #define VDisconRename 0x00010000 /* Rename vnop. */
686 #define VDisconRenameSameDir 0x00020000 /* Rename in same dir. */
688 /*... to be continued ... */
690 /* vcache (file) cachingStates bits */
691 #define FCSDesireBypass 0x1 /* This file should bypass the cache */
692 #define FCSBypass 0x2 /* This file is currently NOT being cached */
693 #define FCSManuallySet 0x4 /* The bypass flags were set, or reset, manually (via pioctl)
694 and should not be overridden by the file's name */
696 /* Flag values used by the Transition routines */
697 #define TRANSChangeDesiredBit 0x1 /* The Transition routine should set or
698 * reset the FCSDesireBypass bit */
699 #define TRANSVcacheIsLocked 0x2 /* The Transition routine does not need to
700 * lock vcache (it's already locked) */
701 #define TRANSSetManualBit 0x4 /* The Transition routine should set FCSManuallySet so that
702 * filename checking does not override pioctl requests */
705 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
706 #define vrefCount v->v_usecount
708 #define vrefCount v.v_count
709 #endif /* AFS_XBSD_ENV */
711 #if defined(AFS_DARWIN80_ENV)
712 #define VREFCOUNT_GT(v, y) vnode_isinuse(AFSTOV(v), (y))
713 #elif defined(AFS_FBSD_ENV)
714 #define VREFCOUNT(v) (vrefcnt(AFSTOV(v)))
715 #define VREFCOUNT_GT(v, y) (vrefcnt(AFSTOV(v)) > y)
716 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
717 #define VREFCOUNT(v) ((v)->vrefCount)
718 #define VREFCOUNT_GT(v, y) (AFSTOV(v)->v_usecount > (y))
719 #elif defined(AFS_LINUX24_ENV)
720 #define VREFCOUNT(v) atomic_read(&(AFSTOV(v)->v_count))
721 #define VREFCOUNT_GT(v, y) (VREFCOUNT(v)>y)
722 #define VREFCOUNT_SET(v, c) atomic_set(&(AFSTOV(v)->v_count), c)
723 #define VREFCOUNT_DEC(v) atomic_dec(&(AFSTOV(v)->v_count))
724 #define VREFCOUNT_INC(v) atomic_inc(&(AFSTOV(v)->v_count))
726 #define VREFCOUNT(v) ((v)->vrefCount)
727 #define VREFCOUNT_GT(v,y) ((v)->vrefCount > (y))
728 #define VREFCOUNT_SET(v, c) (v)->vrefCount = c;
729 #define VREFCOUNT_DEC(v) (v)->vrefCount--;
730 #define VREFCOUNT_INC(v) (v)->vrefCount++;
731 #define d_unhash(d) list_empty(&(d)->d_hash)
732 #define dget_locked(d) dget(d)
735 #define AFS_MAXDV 0x7fffffff /* largest dataversion number */
736 #ifdef AFS_64BIT_CLIENT
737 #define AFS_NOTRUNC 0x7fffffffffffffffLL /* largest positive int64 number */
738 #else /* AFS_64BIT_CLIENT */
739 #define AFS_NOTRUNC 0x7fffffff /* largest dataversion number */
740 #endif /* AFS_64BIT_CLIENT */
742 extern afs_int32 vmPageHog; /* counter for # of vnodes which are page hogs. */
744 #if defined(AFS_DARWIN80_ENV)
745 #define VTOAFS(v) ((struct vcache *)vnode_fsnode((v)))
746 #define AFSTOV(vc) ((vc)->v)
747 #elif defined(AFS_NBSD40_ENV)
749 struct genfs_node gfsn;
750 struct vcache *afsvc;
752 #define VTOAFS(v) ((((struct nbvdata *)((v)->v_data)))->afsvc)
753 #define AFSTOV(vc) ((vc)->v)
754 #elif defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE))
755 #define VTOAFS(v) ((struct vcache *)(v)->v_data)
756 #define AFSTOV(vc) ((vc)->v)
758 #define VTOAFS(V) ((struct vcache *)(V))
759 #define AFSTOV(V) (&(V)->v)
767 /* VCache elements which are kept on disk, and in the kernel */
772 afs_hyper_t DataVersion;
776 afs_uint16 Mode; /* XXXX Should be afs_int32 XXXX */
777 afs_uint16 LinkCount;
778 #ifdef AFS_DARWIN80_ENV
781 /* vnode type is in v.v_type */
784 struct afs_vnuniq parent;
786 /*! Truncate file to this position at the next store */
789 /*! System:AnyUser's access to this. */
795 /*! Disconnected flags for this vcache element. */
796 afs_uint32 ddirty_flags;
797 /*! Shadow vnode + unique keep the shadow dir location. */
798 struct afs_vnuniq shadow;
799 /*! The old parent FID for renamed vnodes */
800 struct afs_vnuniq oldParent;
805 * This is for the multiPage field in struct vcache. Each one of these
806 * represents an outstanding getpage request that is larger than a single page.
807 * Recording these is necessary to prevent afs_GetOnePage from trying to evict
808 * a dcache entry that an earlier afs_GetOnePage call got in the same getpage
809 * request. See osi_VM_MultiPageConflict and afs_getpage.
811 struct multiPage_range {
813 offset_t off; /**< offset of getpage request */
814 u_int len; /**< length of getpage request */
818 /* INVARIANTs: (vlruq.next != NULL) == (vlruq.prev != NULL)
819 * nextfree => !vlruq.next && ! vlruq.prev
820 * !(avc->nextfree) && !avc->vlruq.next => (FreeVCList == avc->nextfree)
823 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) || (defined(AFS_LINUX22_ENV) && !defined(STRUCT_SUPER_OPERATIONS_HAS_ALLOC_INODE))
826 struct vnode v; /* Has reference count in v.v_count */
828 struct afs_q vlruq; /* lru q next and prev */
829 #if !defined(AFS_LINUX22_ENV)
830 struct vcache *nextfree; /* next on free list (if free) */
832 struct vcache *hnext; /* Hash next */
833 struct afs_q vhashq; /* Hashed per-volume list */
834 /*! Queue of dirty vcaches. Lock with afs_disconDirtyLock */
836 /*! Queue of vcaches with shadow entries. Lock with afs_disconDirtyLock */
837 struct afs_q shadowq;
838 /*! Queue of vcaches with dirty metadata. Locked by afs_xvcdirty */
839 struct afs_q metadirty;
840 /*! Vcaches slot number in the disk backup. Protected by tvc->lock */
843 afs_rwlock_t lock; /* The lock on the vcache contents. */
844 #if defined(AFS_SUN5_ENV)
845 /* Lock used to protect the activeV, multipage, and vstates fields.
846 * Do not try to get the vcache lock when the vlock is held */
848 #endif /* defined(AFS_SUN5_ENV) */
849 #if defined(AFS_SUN5_ENV)
853 #ifdef AFS_BOZONLOCK_ENV
854 afs_bozoLock_t pvnLock; /* see locks.x */
859 #if defined(AFS_AIX51_ENV)
867 int ownslock; /* pid of owner of excl lock, else 0 - defect 3083 */
869 #ifdef AFS_DARWIN80_ENV
871 #elif defined(AFS_DARWIN_ENV)
872 struct lock__bsd__ rwlock;
875 #if !defined(AFS_DFBSD_ENV) && !defined(AFS_NBSD_ENV)
880 struct VenusFid *mvid; /* Either parent dir (if root) or root (if mt pt) */
881 char *linkData; /* Link data if a symlink. */
882 afs_hyper_t flushDV; /* data version last flushed from text */
883 afs_hyper_t mapDV; /* data version last flushed from map */
884 struct server *callback; /* The callback host, if any */
885 afs_uint32 cbExpires; /* time the callback expires */
886 struct afs_q callsort; /* queue in expiry order, sort of */
887 struct axscache *Access; /* a list of cached access bits */
888 afs_int32 last_looker; /* pag/uid from last lookup here */
889 #if defined(AFS_SUN5_ENV)
891 #endif /* defined(AFS_SUN5_ENV) */
892 struct SimpleLocks *slocks;
893 short opens; /* The numbers of opens, read or write, on this file. */
894 short execsOrWriters; /* The number of execs (if < 0) or writers (if > 0) of
896 short flockCount; /* count of flock readers, or -1 if writer */
897 char mvstat; /* 0->normal, 1->mt pt, 2->root. */
899 char cachingStates; /* Caching policies for this file */
900 afs_uint32 cachingTransitions; /* # of times file has flopped between caching and not */
902 #if defined(AFS_LINUX24_ENV)
903 off_t next_seq_offset; /* Next sequential offset (used by prefetch/readahead) */
904 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI65_ENV)
905 off_t next_seq_blk_offset; /* accounted in blocks for Solaris & IRIX */
908 #if defined(AFS_SUN5_ENV)
909 afs_uint32 vstates; /* vstate bits */
910 #endif /* defined(AFS_SUN5_ENV) */
911 struct dcache *dchint;
912 struct dcache *dcreaddir; /* dcache for in-progress readdir */
913 unsigned int readdir_pid; /* pid of the thread in readdir */
914 #if defined(AFS_SGI_ENV)
915 daddr_t lastr; /* for read-ahead */
917 uint64_t vc_rwlockid; /* kthread owning rwlock */
919 short vc_rwlockid; /* pid of process owning rwlock */
921 short vc_locktrips; /* # of rwlock reacquisitions */
922 sema_t vc_rwlock; /* vop_rwlock for afs */
923 pgno_t mapcnt; /* # of pages mapped */
924 struct cred *cred; /* last writer's cred */
926 struct bhv_desc vc_bhv_desc; /* vnode's behavior data. */
928 #endif /* AFS_SGI_ENV */
929 #if defined(AFS_LINUX26_ENV)
930 cred_t *cred; /* last writer's cred */
932 #ifdef AFS_LINUX24_ENV
933 struct dentry *target_link; /* dentry we prefer, when we are redirecting
934 * all requests due to duplicate dentry aliases.
935 * See LINUX/osi_vnodeops.c. Note that this is
936 * NOT an actual reference to a dentry, so this
937 * pointer MUST NOT be dereferenced on its own. */
939 afs_int32 vc_error; /* stash write error for this vnode. */
940 int xlatordv; /* Used by nfs xlator */
942 int asynchrony; /* num kbytes to store behind */
944 struct afs_q multiPage; /* list of multiPage_range structs */
946 int protocol; /* RX_FILESERVER, RX_OSD, ... defined in afsint.xg */
947 #if !defined(UKERNEL)
948 void *vpacRock; /* used to read or write in visible partitions */
952 #define DONT_CHECK_MODE_BITS 0
953 #define CHECK_MODE_BITS 1
954 #define CMB_ALLOW_EXEC_AS_READ 2 /* For the NFS xlator */
956 #if defined(AFS_SGI_ENV)
957 #define AVCRWLOCK(avc) (valusema(&(avc)->vc_rwlock) <= 0)
959 /* SGI vnode rwlock macros and flags. */
960 #ifndef AFS_SGI62_ENV
961 /* The following are defined here. SGI 6.2 declares them in vnode.h */
962 #define VRWLOCK_READ 0
963 #define VRWLOCK_WRITE 1
964 #define VRWLOCK_WRITE_DIRECT 2
969 #define AFS_RWLOCK_T vrwlock_t
971 #define AFS_RWLOCK_T int
972 #endif /* AFS_SGI62_ENV */
974 #include <ksys/behavior.h>
975 #define AFS_RWLOCK(V,F) \
976 afs_rwlock(&VTOAFS(V)->vc_bhv_desc, (F));
977 #define AFS_RWUNLOCK(V,F) \
978 afs_rwunlock(&VTOAFS(V)->vc_bhv_desc, (F));
981 #define AFS_RWLOCK(V,F) afs_rwlock((vnode_t *)(V), (F) )
982 #define AFS_RWUNLOCK(V,F) afs_rwunlock((vnode_t *)(V), (F) )
984 #else /* AFS_SGI53_ENV */
985 #define AFS_RWLOCK(V,F) afs_rwlock((V))
986 #define AFS_RWUNLOCK(V,F) afs_rwunlock((V))
987 #endif /* AFS_SGI53_ENV */
988 #endif /* AFS_SGI_ENV */
992 afs_hyper_t DataVersion;
994 afs_int32 parentVnode;
995 afs_int32 parentUnique;
999 afs_int32 randomUid[CPSIZE];
1000 afs_int32 callback; /* Now a pointer to 'server' struct */
1001 afs_int32 cbExpires;
1002 afs_int32 randomAccess[CPSIZE];
1003 afs_int32 anyAccess;
1005 short execsOrWriters;
1012 afs_int32 callerAccess;
1013 afs_int32 cbExpires;
1014 afs_int32 anyAccess;
1023 /* CM inititialization parameters. What CM actually used after calculations
1024 * based on passed in arguments.
1026 #define CMI_VERSION 1 /* increment when adding new fields. */
1027 struct cm_initparams {
1029 int cmi_nChunkFiles;
1030 int cmi_nStatCaches;
1031 int cmi_nDataCaches;
1032 int cmi_nVolumeCaches;
1033 int cmi_firstChunkSize;
1034 int cmi_otherChunkSize;
1035 int cmi_cacheSize; /* The original cache size, in 1K blocks. */
1036 unsigned cmi_setTime:1;
1037 unsigned cmi_memCache:1;
1038 int spare[16 - 9]; /* size of struct is 16 * 4 = 64 bytes */
1042 /*----------------------------------------------------------------------
1043 * AFS Data cache definitions
1045 * Each entry describes a Unix file on the local disk that is
1046 * is serving as a cached copy of all or part of a Vice file.
1047 * Entries live in circular queues for each hash table slot
1049 * Which queue is this thing in? Good question.
1050 * A struct dcache entry is in the freeDSlot queue when not associated with a cache slot (file).
1051 * Otherwise, it is in the DLRU queue. The freeDSlot queue uses the lruq.next field as
1052 * its "next" pointer.
1054 * Cache entries in the DLRU queue are either associated with vice files, in which case
1055 * they are hashed by afs_dvnextTbl and afs_dcnextTbl pointers, or they are in the freeDCList
1056 * and are not associated with any vice file. This last list uses the afs_dvnextTbl pointer for
1057 * its "next" pointer.
1058 *----------------------------------------------------------------------*/
1060 #define NULLIDX (-1) /* null index definition */
1061 /* struct dcache states bits */
1065 #define DWriting 8 /* file being written (used for cache validation) */
1067 /* dcache data flags */
1068 #define DFEntryMod 0x02 /* has entry itself been modified? */
1069 #define DFFetching 0x04 /* file is currently being fetched */
1071 /* dcache meta flags */
1072 #define DFNextStarted 0x01 /* next chunk has been prefetched already */
1073 #define DFFetchReq 0x10 /* someone is waiting for DFFetching to go on */
1076 /* flags in afs_indexFlags array */
1077 #define IFEverUsed 1 /* index entry has >= 1 byte of data */
1078 #define IFFree 2 /* index entry in freeDCList */
1079 #define IFDataMod 4 /* file needs to be written out */
1080 #define IFFlag 8 /* utility flag */
1081 #define IFDirtyPages 16 /* Solaris-only. contains dirty pages */
1082 #define IFAnyPages 32
1083 #define IFDiscarded 64 /* index entry in discardDCList */
1085 #ifdef AFS_DARWIN100_ENV
1086 typedef user_addr_t iparmtype; /* 64 bit */
1087 typedef user_addr_t uparmtype; /* 64 bit */
1089 typedef char * uparmtype;
1090 #ifdef AFS_SGI65_ENV
1091 typedef afs_uint32 iparmtype;
1093 typedef long iparmtype;
1097 #if SIZEOF_VOID_P == SIZEOF_UNSIGNED_INT
1098 # define uintptrsz unsigned int
1099 #elif SIZEOF_VOID_P == SIZEOF_UNSIGNED_LONG
1100 # define uintptrsz unsigned long
1101 #elif SIZEOF_VOID_P == SIZEOF_UNSIGNED_LONG_LONG
1102 # define uintptrsz unsigned long long
1104 # error "Unable to determine casting for pointers"
1108 uparmtype in; /* input buffer */
1109 uparmtype out; /* output buffer */
1110 short in_size; /* Size of input buffer <= 2K */
1111 short out_size; /* Maximum size of output buffer, <= 2K */
1115 * This version of afs_ioctl is required to pass in 32 bit user space
1116 * pointers into a 64 bit kernel.
1119 struct afs_ioctl32 {
1127 /* CacheItems file has a header of type struct afs_fheader
1128 * (keep aligned properly). Since we already have sgi_62 clients running
1129 * with a 32 bit inode, a change is required to the header so that
1130 * they can distinguish the old 32 bit inode CacheItems file and zap it
1131 * instead of using it.
1133 struct afs_fheader {
1134 #define AFS_FHMAGIC 0x7635abaf /* uses version number */
1136 #define AFS_CI_VERSION 4
1138 afs_uint32 dataSize;
1139 afs_int32 firstCSize;
1140 afs_int32 otherCSize;
1143 #if defined(AFS_CACHE_VNODE_PATH)
1144 typedef char *afs_ufs_dcache_id_t;
1145 #elif defined(AFS_SGI61_ENV) || defined(AFS_SUN5_64BIT_ENV)
1146 /* Using ino64_t here so that user level debugging programs compile
1147 * the size correctly.
1149 typedef ino64_t afs_ufs_dcache_id_t;
1150 #elif defined(AFS_LINUX26_ENV)
1151 #define MAX_FH_LEN 10
1153 #if defined(NEW_EXPORT_OPS)
1156 __u32 raw[MAX_FH_LEN];
1157 } afs_ufs_dcache_id_t;
1158 extern int cache_fh_type;
1159 extern int cache_fh_len;
1160 #elif defined(AFS_LINUX_64BIT_KERNEL) && !defined(AFS_S390X_LINUX24_ENV)
1161 typedef long afs_ufs_dcache_id_t;
1162 #elif defined(AFS_AIX51_ENV) || defined(AFS_HPUX1123_ENV)
1163 typedef ino_t afs_ufs_dcache_id_t;
1165 typedef afs_int32 afs_ufs_dcache_id_t;
1168 typedef afs_int32 afs_mem_dcache_id_t;
1171 afs_ufs_dcache_id_t ufs;
1172 afs_mem_dcache_id_t mem;
1175 /* it does not compile outside kernel */
1177 afs_int32 fid; /* is adc->index, the cache file number */
1178 afs_dcache_id_t inode; /* is adc->f.inode, the inode number of the cac\
1181 afs_int32 accesstime;
1182 struct buffer *hashNext;
1187 afs_rwlock_t lock; /* the lock for this structure */
1190 /* kept on disk and in dcache entries */
1192 struct VenusFid fid; /* Fid for this file */
1193 afs_int32 modTime; /* last time this entry was modified */
1194 afs_hyper_t versionNo; /* Associated data version number */
1195 afs_int32 chunk; /* Relative chunk number */
1196 afs_dcache_id_t inode; /* Unix inode for this chunk */
1197 afs_int32 chunkBytes; /* Num bytes in this chunk */
1198 char states; /* Has this chunk been modified? */
1201 /* magic numbers to specify the cache type */
1203 #define AFS_FCACHE_TYPE_UFS 0x0
1204 #define AFS_FCACHE_TYPE_MEM 0x1
1205 #define AFS_FCACHE_TYPE_NFS 0x2
1206 #define AFS_FCACHE_TYPE_EPI 0x3
1208 /* kept in memory */
1210 struct afs_q lruq; /* Free queue for in-memory images */
1211 struct afs_q dirty; /* Queue of dirty entries that need written */
1212 afs_rwlock_t lock; /* Protects validPos, some f */
1213 afs_rwlock_t tlock; /* Atomizes updates to refCount */
1214 afs_rwlock_t mflock; /* Atomizes accesses/updates to mflags */
1215 afs_size_t validPos; /* number of valid bytes during fetch */
1216 afs_int32 index; /* The index in the CacheInfo file */
1217 short refCount; /* Associated reference count. */
1218 char dflags; /* Data flags */
1219 char mflags; /* Meta flags */
1220 struct fcache f; /* disk image */
1221 afs_int32 bucket; /* which bucket these dcache entries are in */
1225 * dcache.lock protects the actual contents of the cache file (in
1226 * f.inode), subfields of f except those noted below, dflags and
1229 * dcache.tlock is used to make atomic updates to refCount. Zero
1230 * refCount dcache entries are protected by afs_xdcache instead of
1233 * dcache.mflock is used to access and update mflags. It cannot be
1234 * held without holding the corresponding dcache.lock. Updating
1235 * mflags requires holding dcache.lock(R) and dcache.mflock(W), and
1236 * checking for mflags requires dcache.lock(R) and dcache.mflock(R).
1237 * Note that dcache.lock(W) gives you the right to update mflags,
1238 * as dcache.mflock(W) can only be held with dcache.lock(R).
1240 * dcache.index, dcache.f.fid, dcache.f.chunk and dcache.f.inode are
1241 * write-protected by afs_xdcache and read-protected by refCount.
1242 * Once an entry is referenced, these values cannot change, and if
1243 * it's on the free list (with refCount=0), it can be reused for a
1244 * different file/chunk. These values can only be written while
1245 * holding afs_xdcache(W) and allocating this dcache entry (thereby
1246 * ensuring noone else has a refCount on it).
1250 /* afs_memcache.c */
1251 struct memCacheEntry {
1252 int size; /* # of valid bytes in this entry */
1253 int dataSize; /* size of allocated data area */
1254 afs_lock_t afs_memLock;
1255 char *data; /* bytes */
1258 struct afs_FetchOutput {
1259 struct AFSVolSync tsync;
1260 struct AFSFetchStatus OutStatus;
1261 struct AFSCallBack CallBack;
1264 /* macro to mark a dcache entry as bad */
1267 (x)->f.fid.Fid.Unique = 0; \
1268 afs_indexUnique[(x)->index] = 0; \
1269 (x)->dflags |= DFEntryMod; \
1272 /* FakeOpen and Fake Close used to be real subroutines. They're only used in
1273 * sun_subr and afs_vnodeops, and they're very frequently called, so I made
1274 * them into macros. They do:
1275 * FakeOpen: fake the file being open for writing. avc->lock must be held
1276 * in write mode. Having the file open for writing is like having a DFS
1277 * write-token: you're known to have the best version of the data around,
1278 * and so the CM won't let it be overwritten by random server info.
1279 * FakeClose: undo the effects of FakeOpen, noting that we want to ensure
1280 * that a real close eventually gets done. We use CCore to achieve this if
1281 * we would end up closing the file. avc->lock must be held in write mode */
1283 #ifdef AFS_AIX_IAUTH_ENV
1284 #define CRKEEP(V, C) (V)->linkData = (char*)crdup((C))
1286 #define CRKEEP(V, C) crhold((C)); (V)->linkData = (char*)(C)
1289 #define afs_FakeOpen(avc) { avc->opens++; avc->execsOrWriters++; }
1290 #define afs_FakeClose(avc, acred) \
1291 { if (avc->execsOrWriters == 1) { \
1292 /* we're the last writer, just use CCore flag */ \
1293 avc->f.states |= CCore; /* causes close to be called later */ \
1295 /* The cred and vnode holds will be released in afs_FlushActiveVcaches */ \
1296 AFS_FAST_HOLD(avc); /* So it won't disappear */ \
1297 CRKEEP(avc, acred); /* Should use a better place for the creds */ \
1300 /* we're not the last writer, let the last one do the store-back for us */ \
1302 avc->execsOrWriters--; \
1306 #define AFS_ZEROS 64 /* zero buffer */
1308 /*#define afs_DirtyPages(avc) (((avc)->f.states & CDirty) || osi_VMDirty_p((avc)))*/
1309 #define afs_DirtyPages(avc) ((avc)->f.states & CDirty)
1311 #define afs_InReadDir(avc) (((avc)->f.states & CReadDir) && (avc)->readdir_pid == MyPidxx2Pid(MyPidxx))
1313 /* The PFlush algorithm makes use of the fact that Fid.Unique is not used in
1314 below hash algorithms. Change it if need be so that flushing algorithm
1315 doesn't move things from one hash chain to another
1317 /* extern int afs_dhashsize; */
1318 #define DCHash(v, c) ((((v)->Fid.Vnode + (v)->Fid.Volume + (c))) & (afs_dhashsize-1))
1319 /*Vnode, Chunk -> Hash table index */
1320 #define DVHash(v) ((((v)->Fid.Vnode + (v)->Fid.Volume )) & (afs_dhashsize-1))
1321 /*Vnode -> Other hash table index */
1322 /* don't hash on the cell, our callback-breaking code sometimes fails to compute
1323 the cell correctly, and only scans one hash bucket */
1324 #define VCHash(fid) (((fid)->Fid.Volume + (fid)->Fid.Vnode) & (VCSIZE-1))
1325 /* Hash only on volume to speed up volume callbacks. */
1326 #define VCHashV(fid) ((fid)->Fid.Volume & (VCSIZE-1))
1328 extern struct dcache **afs_indexTable; /*Pointers to in-memory dcache entries */
1329 extern afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
1330 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
1331 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
1332 extern afs_int32 afs_cacheFiles; /*Size of afs_indexTable */
1333 extern afs_int32 afs_cacheBlocks; /*1K blocks in cache */
1334 extern afs_int32 afs_cacheStats; /*Stat entries in cache */
1335 extern struct vcache *afs_vhashT[VCSIZE]; /*Stat cache hash table */
1336 extern struct afs_q afs_vhashTV[VCSIZE]; /* cache hash table on volume */
1337 extern afs_int32 afs_initState; /*Initialization state */
1338 extern afs_int32 afs_termState; /* Termination state */
1339 extern struct VenusFid afs_rootFid; /*Root for whole file system */
1340 extern afs_int32 afs_allCBs; /* Count of callbacks */
1341 extern afs_int32 afs_oddCBs; /* Count of odd callbacks */
1342 extern afs_int32 afs_evenCBs; /* Count of even callbacks */
1343 extern afs_int32 afs_allZaps; /* Count of fid deletes */
1344 extern afs_int32 afs_oddZaps; /* Count of odd fid deletes */
1345 extern afs_int32 afs_evenZaps; /* Count of even fid deletes */
1346 extern struct brequest afs_brs[NBRS]; /* request structures */
1348 #define UHash(auid) ((auid) & (NUSERS-1))
1349 #define VHash(avol) ((avol)&(NVOLS-1))
1350 #define SHash(aserv) ((ntohl(aserv)) & (NSERVERS-1))
1351 #define FVHash(acell,avol) (((avol)+(acell)) & (NFENTRIES-1))
1353 /* Performance hack - we could replace VerifyVCache2 with the appropriate
1354 * GetVCache incantation, and could eliminate even this code from afs_UFSRead
1355 * by making intentionally invalidating quick.stamp in the various callbacks
1356 * expiration/breaking code */
1357 #ifdef AFS_DARWIN_ENV
1358 #define afs_VerifyVCache(avc, areq) \
1359 (((avc)->f.states & CStatd) ? (osi_VM_Setup(avc, 0), 0) : \
1360 afs_VerifyVCache2((avc),areq))
1362 #define afs_VerifyVCache(avc, areq) \
1363 (((avc)->f.states & CStatd) ? 0 : afs_VerifyVCache2((avc),areq))
1366 #define DO_STATS 1 /* bits used by FindVCache */
1371 /* values for adown value of afs_LoopServers */
1373 #define AFS_LS_DOWN 1
1374 #define AFS_LS_ALL 2
1376 /* values for flag param of afs_CheckVolumeNames */
1377 #define AFS_VOLCHECK_EXPIRED 0x1 /* volumes whose callbacks have expired */
1378 #define AFS_VOLCHECK_BUSY 0x2 /* volumes which were marked busy */
1379 #define AFS_VOLCHECK_MTPTS 0x4 /* mount point invalidation also */
1380 #define AFS_VOLCHECK_FORCE 0x8 /* do all forcibly */
1384 #define AFS_FSPORT ((unsigned short) htons(7000))
1385 #define AFS_VLPORT ((unsigned short) htons(7003))
1386 #define AFS_RXOSDPORT ((unsigned short) htons(7011))
1388 #define afs_rdwr(avc, uio, rw, io, cred) \
1389 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 0) : afs_read(avc, uio, cred, 0))
1390 #define afs_nlrdwr(avc, uio, rw, io, cred) \
1391 (((rw) == UIO_WRITE) ? afs_write(avc, uio, io, cred, 1) : afs_read(avc, uio, cred, 1))
1393 /* Cache size truncation uses the following low and high water marks:
1394 * If the cache is more than 95% full (CM_DCACHECOUNTFREEPCT), the cache
1395 * truncation daemon is awakened and will free up space until the cache is 85%
1396 * (CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT) full.
1397 * afs_UFSWrite and afs_GetDCache (when it needs to fetch data) will wait on
1398 * afs_WaitForCacheDrain if the cache is 98% (CM_WAITFORDRAINPCT) full.
1399 * afs_GetDownD wakes those processes once the cache is 95% full
1400 * (CM_CACHESIZEDRAINEDPCT).
1402 #define CM_MAXDISCARDEDCHUNKS 16 /* # of chunks */
1403 #define CM_DCACHECOUNTFREEPCT 95 /* max pct of chunks in use */
1404 #define CM_DCACHESPACEFREEPCT 90 /* max pct of space in use */
1405 #define CM_DCACHEEXTRAPCT 5 /* extra to get when freeing */
1406 #define CM_CACHESIZEDRAINEDPCT 95 /* wakeup processes when down to here. */
1407 #define CM_WAITFORDRAINPCT 98 /* sleep if cache is this full. */
1409 /* when afs_cacheBlocks is large, settle for slightly decreased precision */
1410 #define PERCENT(p, v) \
1411 ((afs_cacheBlocks & 0xffe00000) ? ((v) / 100 * (p)) : ((p) * (v) / 100))
1413 #define afs_CacheIsTooFull() \
1414 (afs_blocksUsed - afs_blocksDiscarded > \
1415 PERCENT(CM_DCACHECOUNTFREEPCT, afs_cacheBlocks) || \
1416 afs_freeDCCount - afs_discardDCCount < \
1417 PERCENT(100 - CM_DCACHECOUNTFREEPCT, afs_cacheFiles))
1419 /* Handy max length of a numeric string. */
1420 #define CVBS 12 /* max afs_int32 is 2^32 ~ 4*10^9, +1 for NULL, +luck */
1422 #define refpanic(foo) if (afs_norefpanic) \
1423 { printf( foo ); afs_norefpanic++;} else osi_Panic( foo )
1426 ** these are defined in the AIX source code sys/fs_locks.h but are not
1427 ** defined anywhere in the /usr/include directory
1429 #if defined(AFS_AIX41_ENV)
1430 #define VN_LOCK(vp) simple_lock(&(vp)->v_lock)
1431 #define VN_UNLOCK(vp) simple_unlock(&(vp)->v_lock)
1434 /* get a file's serial number from a vnode */
1435 #ifndef afs_vnodeToInumber
1436 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1437 #define afs_vnodeToInumber(V) VnodeToIno(V)
1439 #define afs_vnodeToInumber(V) (VTOI(V)->i_number)
1440 #endif /* AFS_SGI62_ENV */
1443 /* get a file's device number from a vnode */
1444 #ifndef afs_vnodeToDev
1445 #if defined(AFS_SGI62_ENV) || defined(AFS_HAVE_VXFS) || defined(AFS_DARWIN_ENV)
1446 #define afs_vnodeToDev(V) VnodeToDev(V)
1447 #elif defined(UKERNEL)
1448 #define afs_vnodeToDev(V) (VTOI(V) ? (VTOI(V)->i_dev) : (-1))
1450 #define afs_vnodeToDev(V) (VTOI(V)->i_dev)
1454 /* declare something so that prototypes don't flip out */
1455 /* appears struct buf stuff is only actually passed around as a pointer,
1456 except with libuafs, in which case it is actually defined */
1460 struct rxfs_storeVariables {
1461 struct rx_call *call;
1462 struct vcache *vcache;
1466 afs_int32 hasNo64bit;
1467 struct AFSStoreStatus InStatus;
1471 int (*prepare)(void *rock, afs_uint32 size, afs_uint32 *bytestoxfer);
1472 int (*read)(void *rock, struct osi_file *tfile, afs_uint32 offset,
1473 afs_uint32 tlen, afs_uint32 *bytesread);
1474 int (*write)(void *rock, afs_uint32 tlen, afs_uint32 *byteswritten);
1475 int (*status)(void *rock);
1476 int (*padd)(void *rock, afs_uint32 tlen);
1477 int (*close)(void *rock, struct AFSFetchStatus *OutStatus,
1478 afs_int32 *doProcessFS);
1479 int (*destroy)(void **rock, afs_int32 error);
1480 int (*storeproc)(struct storeOps *, void *, struct dcache *, int *,
1485 int (*more)(void *rock, afs_int32 *length, afs_uint32 *moredata);
1486 int (*read)(void *rock, afs_uint32 tlen, afs_uint32 *bytesread);
1487 int (*write)(void *rock, struct osi_file *fp, afs_uint32 offset,
1488 afs_uint32 tlen, afs_uint32 *byteswritten);
1489 int (*close)(void *rock, struct vcache *avc, struct dcache *adc,
1490 struct afs_FetchOutput *Outputs);
1491 int (*destroy)(void **rock, afs_int32 error);
1494 /* fakestat support: opaque storage for afs_EvalFakeStat to remember
1495 * what vcache should be released.
1497 struct afs_fakestat_state {
1501 struct vcache *root_vp;
1504 extern int afs_fakestat_enable;
1505 extern int afsd_dynamic_vcaches;
1508 * Wrappers for access to credentials structure members
1509 * Linux uses the kernel cred structure if available, with the
1510 * wrappers defined in LINUX/osi_machdep.h
1512 #if defined(AFS_NBSD40_ENV)
1513 /* in osi_machdep.h as expected */
1514 #elif defined (AFS_DARWIN110_ENV)
1515 #define afs_cr_uid(cred) kauth_cred_getuid((kauth_cred_t)(cred))
1516 #define afs_cr_gid(cred) kauth_cred_getgid((kauth_cred_t)(cred))
1517 #elif !(defined(AFS_LINUX26_ENV) && defined(STRUCT_TASK_STRUCT_HAS_CRED))
1518 #define afs_cr_uid(cred) ((cred)->cr_uid)
1519 #define afs_cr_gid(cred) ((cred)->cr_gid)
1520 #if !defined(AFS_OBSD_ENV)
1521 #define afs_cr_ruid(cred) ((cred)->cr_ruid)
1522 #define afs_cr_rgid(cred) ((cred)->cr_rgid)
1525 #if !defined(AFS_DARWIN110_ENV)
1527 afs_set_cr_uid(afs_ucred_t *cred, uid_t uid) {
1531 afs_set_cr_gid(afs_ucred_t *cred, gid_t gid) {
1534 #if !defined(AFS_OBSD_ENV)
1536 afs_set_cr_ruid(afs_ucred_t *cred, uid_t uid) {
1537 cred->cr_ruid = uid;
1540 afs_set_cr_rgid(afs_ucred_t *cred, gid_t gid) {
1541 cred->cr_rgid = gid;
1543 #endif /* ! AFS_OBSD_ENV */
1544 #endif /* ! AFS_DARWIN110_ENV */
1549 /** The 32 bit OS expects the members of this structure to be 32 bit
1550 * quantities and the 64 bit OS expects them as 64 bit quanties. Hence
1551 * to accomodate both, *long* is used instead of afs_int32
1563 extern int Afs_syscall(struct afssysa *uap, rval_t *rvp);
1564 #endif /* AFS_SUN5_ENV */
1567 * Various definitions for osi_sleep and its event hash table
1568 * DFBSD and SUNOS have no osi_sleep, and HPUX has its own hack for this stuff
1570 #define AFS_EVHASHSIZE 128 /* size of afs_evhasht, must be power of 2 */
1572 typedef struct afs_event {
1573 struct afs_event *next; /* next in hash chain */
1574 char *event; /* lwp event: an address */
1575 int refcount; /* Is it in use? */
1576 int seq; /* Sequence number: this is incremented
1577 * by wakeup calls; wait will not return until
1579 #if defined(AFS_AIX_ENV)
1581 #elif defined(AFS_DARWIN_ENV)
1582 # ifdef AFS_DARWIN80_ENV
1586 /* no cond member */
1587 #elif defined(AFS_FBSD_ENV) || defined(AFS_OBSD_ENV)
1588 int cond; /* "all this gluck should probably be replaced by CVs" */
1589 #elif defined(AFS_LINUX24_ENV)
1590 wait_queue_head_t cond;
1591 #elif defined(AFS_NBSD_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
1592 kcondvar_t cond; /* Currently associated condition variable */
1596 extern afs_event_t *afs_evhasht[AFS_EVHASHSIZE]; /* Hash table for events */
1598 #endif /* _AFS_H_ */