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
10 #include <afsconfig.h>
11 #include <afs/param.h>
23 #include <netinet/in.h>
27 #include <afs/assert.h>
30 #include <afs/afsint.h>
31 #include <afs/rxgen_consts.h>
33 #include <afs/errors.h>
34 #include <afs/ihandle.h>
35 #include <afs/vnode.h>
36 #include <afs/volume.h>
37 #ifdef AFS_ATHENA_STDENV
41 #include <afs/ptclient.h>
42 #include <afs/prs_fs.h>
44 #include <afs/afsutil.h>
46 #include <afs/cellconfig.h>
52 #ifdef AFS_PTHREAD_ENV
53 pthread_mutex_t host_glock_mutex;
54 #endif /* AFS_PTHREAD_ENV */
57 extern int CurrentConnections;
59 extern int AnonymousID;
60 extern prlist AnonCPS;
62 extern struct afsconf_dir *confDir; /* config dir object */
63 extern int lwps; /* the max number of server threads */
64 extern afsUUID FS_HostUUID;
66 int CEs = 0; /* active clients */
67 int CEBlocks = 0; /* number of blocks of CEs */
68 struct client *CEFree = 0; /* first free client */
69 struct host *hostList = 0; /* linked list of all hosts */
70 int hostCount = 0; /* number of hosts in hostList */
74 #define CESPERBLOCK 73
75 struct CEBlock /* block of CESPERBLOCK file entries */
77 struct client entry[CESPERBLOCK];
81 * Make sure the subnet macros have been defined.
84 #define IN_SUBNETA(i) ((((afs_int32)(i))&0x80800000)==0x00800000)
87 #ifndef IN_CLASSA_SUBNET
88 #define IN_CLASSA_SUBNET 0xffff0000
92 #define IN_SUBNETB(i) ((((afs_int32)(i))&0xc0008000)==0x80008000)
95 #ifndef IN_CLASSB_SUBNET
96 #define IN_CLASSB_SUBNET 0xffffff00
99 #define rxr_GetEpoch(aconn) (((struct rx_connection *)(aconn))->epoch)
101 #define rxr_CidOf(aconn) (((struct rx_connection *)(aconn))->cid)
103 #define rxr_PortOf(aconn) \
104 rx_PortOf(rx_PeerOf(((struct rx_connection *)(aconn))))
106 #define rxr_HostOf(aconn) \
107 rx_HostOf(rx_PeerOf((struct rx_connection *)(aconn)))
110 /* get a new block of CEs and chain it on CEFree */
111 static void GetCEBlock()
113 register struct CEBlock *block;
116 block = (struct CEBlock *)malloc(sizeof(struct CEBlock));
118 ViceLog(0, ("Failed malloc in GetCEBlock\n"));
119 ShutDownAndCore(PANIC);
122 for(i = 0; i < (CESPERBLOCK -1); i++) {
123 Lock_Init(&block->entry[i].lock);
124 block->entry[i].next = &(block->entry[i+1]);
126 block->entry[CESPERBLOCK-1].next = 0;
127 Lock_Init(&block->entry[CESPERBLOCK-1].lock);
128 CEFree = (struct client *)block;
134 /* get the next available CE */
135 static struct client *GetCE()
138 register struct client *entry;
143 ViceLog(0, ("CEFree NULL in GetCE\n"));
144 ShutDownAndCore(PANIC);
148 CEFree = entry->next;
150 memset((char *)entry, 0, CLIENT_TO_ZERO(entry));
156 /* return an entry to the free list */
157 static void FreeCE(entry)
158 register struct client *entry;
161 entry->next = CEFree;
168 * The HTs and HTBlocks variables were formerly static, but they are
169 * now referenced elsewhere in the FileServer.
171 int HTs = 0; /* active file entries */
172 int HTBlocks = 0; /* number of blocks of HTs */
173 static struct host *HTFree = 0; /* first free file entry */
176 * Hash tables of host pointers. We need two tables, one
177 * to map IP addresses onto host pointers, and another
178 * to map host UUIDs onto host pointers.
180 static struct h_hashChain *hostHashTable[h_HASHENTRIES];
181 static struct h_hashChain *hostUuidHashTable[h_HASHENTRIES];
182 #define h_HashIndex(hostip) ((hostip) & (h_HASHENTRIES-1))
183 #define h_UuidHashIndex(uuidp) (((int)(afs_uuid_hash(uuidp))) & (h_HASHENTRIES-1))
185 struct HTBlock /* block of HTSPERBLOCK file entries */
187 struct host entry[h_HTSPERBLOCK];
191 /* get a new block of HTs and chain it on HTFree */
192 static void GetHTBlock()
195 register struct HTBlock *block;
197 static int index = 0;
199 block = (struct HTBlock *)malloc(sizeof(struct HTBlock));
201 ViceLog(0, ("Failed malloc in GetHTBlock\n"));
202 ShutDownAndCore(PANIC);
205 #ifdef AFS_PTHREAD_ENV
206 for(i=0; i < (h_HTSPERBLOCK); i++)
207 assert(pthread_cond_init(&block->entry[i].cond, NULL) == 0);
208 #endif /* AFS_PTHREAD_ENV */
209 for(i=0; i < (h_HTSPERBLOCK); i++)
210 Lock_Init(&block->entry[i].lock);
211 for(i=0; i < (h_HTSPERBLOCK -1); i++)
212 block->entry[i].next = &(block->entry[i+1]);
213 for (i=0; i< (h_HTSPERBLOCK); i++)
214 block->entry[i].index = index++;
215 block->entry[h_HTSPERBLOCK-1].next = 0;
216 HTFree = (struct host *)block;
217 hosttableptrs[HTBlocks++] = block->entry;
222 /* get the next available HT */
223 static struct host *GetHT()
226 register struct host *entry;
232 HTFree = entry->next;
234 memset((char *)entry, 0, HOST_TO_ZERO(entry));
240 /* return an entry to the free list */
241 static void FreeHT(entry)
242 register struct host *entry;
245 entry->next = HTFree;
252 static short consolePort = 0;
255 register struct host *host;
264 * If this thread does not have a hold on this host AND
265 * if other threads also dont have any holds on this host AND
266 * If either the HOSTDELETED or CLIENTDELETED flags are set
269 int h_Release_r(host)
270 register struct host *host;
273 if (!((host)->holds[h_holdSlot()] & ~h_holdbit()) ) {
274 if (! h_OtherHolds_r(host) ) {
275 /* must avoid masking this until after h_OtherHolds_r runs
276 but it should be run before h_TossStuff_r */
277 (host)->holds[h_holdSlot()] &= ~h_holdbit();
278 if ( (host->hostFlags & HOSTDELETED) ||
279 (host->hostFlags & CLIENTDELETED) ) {
283 (host)->holds[h_holdSlot()] &= ~h_holdbit();
285 (host)->holds[h_holdSlot()] &= ~h_holdbit();
291 register struct host *host;
295 retVal = h_Held_r(host);
300 int h_OtherHolds_r(host)
301 register struct host *host;
303 register int i, bit, slot;
306 for (i = 0 ; i < h_maxSlots ; i++) {
307 if (host->holds[i] != ((i == slot) ? bit : 0)) {
314 int h_OtherHolds(host)
315 register struct host *host;
319 retVal = h_OtherHolds_r(host);
325 register struct host *host;
335 * returns 1 if already locked
336 * else returns locks and returns 0
340 register struct host *host;
342 struct Lock *hostLock = &host->lock;
347 if ( !(hostLock->excl_locked) && !(hostLock->readers_reading) )
348 hostLock->excl_locked = WRITE_LOCK;
352 LOCK_UNLOCK(hostLock)
361 #if FS_STATS_DETAILED
362 /*------------------------------------------------------------------------
363 * PRIVATE h_AddrInSameNetwork
366 * Given a target IP address and a candidate IP address (both
367 * in host byte order), return a non-zero value (1) if the
368 * candidate address is in a different network from the target
372 * a_targetAddr : Target address.
373 * a_candAddr : Candidate address.
376 * 1 if the candidate address is in the same net as the target,
380 * The target and candidate addresses are both in host byte
381 * order, NOT network byte order, when passed in. We return
382 * our value as a character, since that's the type of field in
383 * the host structure, where this info will be stored.
387 *------------------------------------------------------------------------*/
389 static char h_AddrInSameNetwork(a_targetAddr, a_candAddr)
390 afs_uint32 a_targetAddr;
391 afs_uint32 a_candAddr;
393 { /*h_AddrInSameNetwork*/
395 afs_uint32 targetNet;
399 * Pull out the network and subnetwork numbers from the target
400 * and candidate addresses. We can short-circuit this whole
401 * affair if the target and candidate addresses are not of the
404 if (IN_CLASSA(a_targetAddr)) {
405 if (!(IN_CLASSA(a_candAddr))) {
408 targetNet = a_targetAddr & IN_CLASSA_NET;
409 candNet = a_candAddr & IN_CLASSA_NET;
412 if (IN_CLASSB(a_targetAddr)) {
413 if (!(IN_CLASSB(a_candAddr))) {
416 targetNet = a_targetAddr & IN_CLASSB_NET;
417 candNet = a_candAddr & IN_CLASSB_NET;
420 if (IN_CLASSC(a_targetAddr)) {
421 if (!(IN_CLASSC(a_candAddr))) {
424 targetNet = a_targetAddr & IN_CLASSC_NET;
425 candNet = a_candAddr & IN_CLASSC_NET;
428 targetNet = a_targetAddr;
429 candNet = a_candAddr;
430 } /*Class D address*/
433 * Now, simply compare the extracted net values for the two addresses
434 * (which at this point are known to be of the same class)
436 if (targetNet == candNet)
441 } /*h_AddrInSameNetwork*/
442 #endif /* FS_STATS_DETAILED */
446 h_gethostcps_r(host,now)
447 register struct host *host;
448 register afs_int32 now;
453 /* at this point, the host might not be locked, nor held */
454 /* make sure that we do not disappear behind the RPC */
455 if ( !(held = h_Held_r(host)) )
458 /* wait if somebody else is already doing the getCPS call */
459 while ( host->hostFlags & HPCS_INPROGRESS )
461 slept = 1; /* I did sleep */
462 host->hostFlags |= HPCS_WAITING; /* I am sleeping now */
463 #ifdef AFS_PTHREAD_ENV
464 pthread_cond_wait(&host->cond, &host_glock_mutex);
465 #else /* AFS_PTHREAD_ENV */
466 if (( code = LWP_WaitProcess( &(host->hostFlags ))) != LWP_SUCCESS)
467 ViceLog(0, ("LWP_WaitProcess returned %d\n", code));
468 #endif /* AFS_PTHREAD_ENV */
472 host->hostFlags |= HPCS_INPROGRESS; /* mark as CPSCall in progress */
473 if (host->hcps.prlist_val)
474 free(host->hcps.prlist_val); /* this is for hostaclRefresh */
475 host->hcps.prlist_val = (afs_int32 *)0;
476 host->hcps.prlist_len = 0;
477 slept? (host->cpsCall = FT_ApproxTime()): (host->cpsCall = now );
480 code = pr_GetHostCPS(htonl(host->host), &host->hcps);
484 * Although ubik_Call (called by pr_GetHostCPS) traverses thru all protection servers
485 * and reevaluates things if no sync server or quorum is found we could still end up
486 * with one of these errors. In such case we would like to reevaluate the rpc call to
487 * find if there's cps for this guy. We treat other errors (except network failures
488 * ones - i.e. code < 0) as an indication that there is no CPS for this host. Ideally
489 * we could like to deal this problem the other way around (i.e. if code == NOCPS
490 * ignore else retry next time) but the problem is that there're other errors (i.e.
491 * EPERM) for which we don't want to retry and we don't know the whole code list!
493 if (code < 0 || code == UNOQUORUM || code == UNOTSYNC) {
495 * We would have preferred to use a while loop and try again since ops in protected
496 * acls for this host will fail now but they'll be reevaluated on any subsequent
497 * call. The attempt to wait for a quorum/sync site or network error won't work
498 * since this problems really should only occurs during a complete fileserver
499 * restart. Since the fileserver will start before the ptservers (and thus before
500 * quorums are complete) clients will be utilizing all the fileserver's lwps!!
502 host->hcpsfailed = 1;
503 ViceLog(0, ("Warning: GetHostCPS failed (%d) for %x; will retry\n", code, host->host));
505 host->hcpsfailed = 0;
506 ViceLog(1, ("gethost: GetHostCPS failed (%d) for %x; ignored\n", code, host->host));
508 if (host->hcps.prlist_val)
509 free(host->hcps.prlist_val);
510 host->hcps.prlist_val = (afs_int32 *)0;
511 host->hcps.prlist_len = 0; /* Make sure it's zero */
513 host->hcpsfailed = 0;
515 host->hostFlags &= ~HPCS_INPROGRESS;
516 /* signal all who are waiting */
517 if ( host->hostFlags & HPCS_WAITING) /* somebody is waiting */
519 host->hostFlags &= ~HPCS_WAITING;
520 #ifdef AFS_PTHREAD_ENV
521 assert(pthread_cond_broadcast(&host->cond) == 0);
522 #else /* AFS_PTHREAD_ENV */
523 if ( (code = LWP_NoYieldSignal( &(host->hostFlags) )) != LWP_SUCCESS )
524 ViceLog(0, ("LWP_NoYieldSignal returns %d\n", code));
525 #endif /* AFS_PTHREAD_ENV */
528 /* if we had held the host, release it now */
533 void h_flushhostcps(hostaddr, hport)
534 register afs_uint32 hostaddr, hport; /* net byte order */
536 register struct host *host;
540 host = h_Lookup_r(hostaddr, hport, &held);
542 host->hcpsfailed = 1;
553 * Allocate a host. It will be identified by the peer (ip,port) info in the
554 * rx connection provided. The host is returned un-held and un-locked
556 #define DEF_ROPCONS 2115
558 struct host *h_Alloc(r_con)
559 register struct rx_connection *r_con;
563 retVal = h_Alloc_r(r_con);
568 struct host *h_Alloc_r(r_con)
569 register struct rx_connection *r_con;
573 struct servent *serverentry;
574 register index = h_HashIndex(rxr_HostOf(r_con));
575 register struct host *host;
576 static struct rx_securityClass *sc = 0;
578 struct h_hashChain* h_hashChain;
579 #if FS_STATS_DETAILED
580 afs_uint32 newHostAddr_HBO; /*New host IP addr, in host byte order*/
581 #endif /* FS_STATS_DETAILED */
585 h_hashChain = (struct h_hashChain*) malloc(sizeof(struct h_hashChain));
587 h_hashChain->hostPtr = host;
588 h_hashChain->addr = rxr_HostOf(r_con);
589 h_hashChain->next = hostHashTable[index];
590 hostHashTable[index] = h_hashChain;
592 host->host = rxr_HostOf(r_con);
593 host->port = rxr_PortOf(r_con);
594 if(consolePort == 0 ) { /* find the portal number for console */
595 #if defined(AFS_OSF_ENV)
596 serverentry = getservbyname("ropcons", "");
598 serverentry = getservbyname("ropcons", 0);
601 consolePort = serverentry->s_port;
603 consolePort = DEF_ROPCONS; /* Use a default */
605 if (host->port == consolePort) host->Console = 1;
606 /* Make a callback channel even for the console, on the off chance that it
607 makes a request that causes a break call back. It shouldn't. */
610 sc = (struct rx_securityClass *) rxnull_NewClientSecurityObject();
611 host->callback_rxcon = rx_NewConnection (host->host, host->port,
613 rx_SetConnDeadTime(host->callback_rxcon, 50);
614 rx_SetConnHardDeadTime(host->callback_rxcon, AFS_HARDDEADTIME);
616 now = host->LastCall = host->cpsCall = host->ActiveCall = FT_ApproxTime();
618 host->hcps.prlist_val = (afs_int32 *)0;
619 host->hcps.prlist_len = 0;
620 host->hcps.prlist_val = (afs_int32 *)0;
622 /*host->hcpsfailed = 0; /* save cycles */
623 /* h_gethostcps(host); do this under host lock */
624 host->FirstClient = 0;
625 h_InsertList_r(host); /* update global host List */
626 #if FS_STATS_DETAILED
628 * Compare the new host's IP address (in host byte order) with ours
629 * (the File Server's), remembering if they are in the same network.
631 newHostAddr_HBO = (afs_uint32)ntohl(host->host);
632 host->InSameNetwork = h_AddrInSameNetwork(FS_HostAddr_HBO,
634 #endif /* FS_STATS_DETAILED */
640 /* Lookup a host given an IP address and UDP port number. */
641 struct host *h_Lookup(hostaddr, hport, heldp)
642 afs_uint32 hostaddr, hport; /* network byte order */
647 retVal = h_Lookup_r(hostaddr, hport, heldp);
652 /* Note: host should be released by caller if 0 == *heldp and non-null */
653 struct host *h_Lookup_r(hostaddr, hport, heldp)
654 afs_uint32 hostaddr, hport; /* network byte order */
657 register afs_int32 now;
658 register struct host *host=0;
659 register struct h_hashChain* chain;
660 register index = h_HashIndex(hostaddr);
661 extern int hostaclRefresh;
664 for (chain=hostHashTable[index]; chain; chain=chain->next) {
665 host = chain->hostPtr;
667 if (!(host->hostFlags & HOSTDELETED) && chain->addr == hostaddr
668 && host->port == hport) {
669 *heldp = h_Held_r(host);
673 if (host->hostFlags & HOSTDELETED) {
680 now = FT_ApproxTime(); /* always evaluate "now" */
681 if (host->hcpsfailed || (host->cpsCall+hostaclRefresh < now )) {
683 * Every hostaclRefresh period (def 2 hrs) get the new
684 * membership list for the host. Note this could be the
685 * first time that the host is added to a group. Also
686 * here we also retry on previous legitimate hcps failures.
688 h_gethostcps_r(host,now);
698 /* Lookup a host given its UUID. */
699 struct host *h_LookupUuid_r(uuidp)
702 register struct host *host=0;
703 register struct h_hashChain* chain;
704 register index = h_UuidHashIndex(uuidp);
706 for (chain=hostUuidHashTable[index]; chain; chain=chain->next) {
707 host = chain->hostPtr;
709 if (!(host->hostFlags & HOSTDELETED) && host->interface
710 && afs_uuid_equal(&host->interface->uuid, uuidp)) {
721 * h_Hold: Establish a hold by the current LWP on this host--the host
722 * or its clients will not be physically deleted until all holds have
725 * NOTE: h_Hold_r is a macro defined in host.h.
729 register struct host *host;
738 /* h_TossStuff: Toss anything in the host structure (the host or
739 * clients marked for deletion. Called from r_Release ONLY.
740 * To be called, there must be no holds, and either host->deleted
741 * or host->clientDeleted must be set.
744 register struct host *host;
747 register struct client **cp, *client;
750 /* if somebody still has this host held */
751 for (i=0; (i<h_maxSlots)&&(!(host)->holds[i]); i++);
755 /* ASSUMPTION: r_FreeConnection() does not yield */
756 for (cp = &host->FirstClient; client = *cp; ) {
757 if ((host->hostFlags & HOSTDELETED) || client->deleted) {
758 if ((client->ViceId != ANONYMOUSID) && client->CPS.prlist_val) {
759 free(client->CPS.prlist_val);
760 client->CPS.prlist_val = (afs_int32 *)0;
763 rx_SetSpecific(client->tcon, rxcon_client_key, (void *)0);
765 CurrentConnections--;
768 } else cp = &client->next;
771 /* We've just cleaned out all the deleted clients; clear the flag */
772 host->hostFlags &= ~CLIENTDELETED;
774 if (host->hostFlags & HOSTDELETED) {
775 register struct h_hashChain **hp, *th;
776 register struct rx_connection *rxconn;
781 if (host->Console & 1) Console--;
782 if (rxconn = host->callback_rxcon) {
783 host->callback_rxcon = (struct rx_connection *)0;
785 * If rx_DestroyConnection calls h_FreeConnection we will
786 * deadlock on the host_glock_mutex. Work around the problem
787 * by unhooking the client from the connection before
788 * destroying the connection.
790 client = rx_GetSpecific(rxconn, rxcon_client_key);
791 if (client && client->tcon == rxconn)
793 rx_SetSpecific(rxconn, rxcon_client_key, (void *)0);
794 rx_DestroyConnection(rxconn);
796 if (host->hcps.prlist_val)
797 free(host->hcps.prlist_val);
798 host->hcps.prlist_val = (afs_int32 *)0;
799 host->hcps.prlist_len = 0;
800 DeleteAllCallBacks_r(host);
801 host->hostFlags &= ~RESETDONE; /* just to be safe */
803 /* if alternate addresses do not exist */
804 if ( !(host->interface) )
806 for (hp = &hostHashTable[h_HashIndex(host->host)];
807 th = *hp; hp = &th->next)
810 if (th->hostPtr == host)
813 h_DeleteList_r(host);
821 /* delete all hash entries for the UUID */
822 uuidp = &host->interface->uuid;
823 for (hp = &hostUuidHashTable[h_UuidHashIndex(uuidp)];
824 th = *hp; hp = &th->next) {
826 if (th->hostPtr == host)
833 /* delete all hash entries for alternate addresses */
834 assert(host->interface->numberOfInterfaces > 0 );
835 for ( i=0; i < host->interface->numberOfInterfaces; i++)
837 hostAddr = host->interface->addr[i];
838 for (hp = &hostHashTable[h_HashIndex(hostAddr)];
839 th = *hp; hp = &th->next)
842 if (th->hostPtr == host)
850 free(host->interface);
851 host->interface = NULL;
852 h_DeleteList_r(host); /* remove host from global host List */
854 } /* if alternate address exists */
859 /* Called by rx when a server connection disappears */
860 h_FreeConnection(tcon)
861 struct rx_connection *tcon;
864 register struct client *client;
866 client = (struct client *) rx_GetSpecific(tcon, rxcon_client_key);
869 if (client->tcon == tcon)
870 client->tcon = (struct rx_connection *)0;
873 } /*h_FreeConnection*/
876 /* h_Enumerate: Calls (*proc)(host, held, param) for at least each host in the
877 * system at the start of the enumeration (perhaps more). Hosts may be deleted
878 * (have delete flag set); ditto for clients. (*proc) is always called with
879 * host h_held(). The hold state of the host with respect to this lwp is passed
880 * to (*proc) as the param held. The proc should return 0 if the host should be
881 * released, 1 if it should be held after enumeration.
883 h_Enumerate(proc, param)
888 register struct host *host, **list;
890 register int i, count;
893 if (hostCount == 0) {
897 list = (struct host **)malloc(hostCount * sizeof(struct host *));
898 assert(list != NULL);
899 held = (int *)malloc(hostCount * sizeof(int));
900 assert(held != NULL);
901 for (count = 0, host = hostList ; host ; host = host->next, count++) {
903 if (!(held[count] = h_Held_r(host)))
906 assert(count == hostCount);
908 for ( i = 0 ; i < count ; i++) {
909 held[i] = (*proc)(list[i], held[i], param);
911 h_Release(list[i]);/* this might free up the host */
917 /* h_Enumerate_r: Calls (*proc)(host, held, param) for at least each host in
918 * the at the start of the enumeration (perhaps more). Hosts may be deleted
919 * (have delete flag set); ditto for clients. (*proc) is always called with
920 * host h_held() and the global host lock (H_LOCK) locked.The hold state of the
921 * host with respect to this lwp is passed to (*proc) as the param held.
922 * The proc should return 0 if the host should be released, 1 if it should
923 * be held after enumeration.
925 h_Enumerate_r(proc, param)
930 register struct host *host;
933 if (hostCount == 0) {
936 for (host = hostList ; host ; host = host->next) {
937 if (!(held = h_Held_r(host)))
939 held = (*proc)(host, held, param);
941 h_Release_r(host);/* this might free up the host */
946 /* Host is returned held */
947 struct host *h_GetHost_r(tcon)
948 struct rx_connection *tcon;
952 struct host *oldHost;
955 struct interfaceAddr interf;
957 afs_int32 buffer[AFS_MAX_INTERFACE_ADDR];
958 struct Identity *identP = NULL;
962 char hoststr[16], hoststr2[16];
964 haddr = rxr_HostOf(tcon);
965 hport = rxr_PortOf(tcon);
968 identP = (struct Identity *)rx_GetSpecific(tcon, rxcon_ident_key);
969 host = h_Lookup_r(haddr, hport, &held);
970 if (host && !identP && !(host->Console&1)) {
971 /* This is a new connection, and we already have a host
972 * structure for this address. Verify that the identity
973 * of the caller matches the identity in the host structure.
976 if ( !(host->hostFlags & ALTADDR) )
978 /* Another thread is doing initialization */
980 if ( !held) h_Release_r(host);
981 ViceLog(125, ("Host %s:%d starting h_Lookup again\n",
982 afs_inet_ntoa_r(host->host, hoststr), host->port));
985 host->hostFlags &= ~ALTADDR;
987 code = RXAFSCB_WhoAreYou(host->callback_rxcon, &interf);
989 if ( code == RXGEN_OPCODE ) {
990 identP = (struct Identity *)malloc(1);
992 rx_SetSpecific(tcon, rxcon_ident_key, identP);
993 /* The host on this connection was unable to respond to
994 * the WhoAreYou. We will treat this as a new connection
995 * from the existing host. The worst that can happen is
996 * that we maintain some extra callback state information */
997 if (host->interface) {
999 ("Host %s:%d used to support WhoAreYou, deleting.\n",
1000 afs_inet_ntoa_r(host->host, hoststr), host->port));
1001 host->hostFlags |= HOSTDELETED;
1003 if (!held) h_Release_r(host);
1007 } else if (code == 0) {
1009 identP = (struct Identity *)malloc(sizeof(struct Identity));
1011 identP->uuid = interf.uuid;
1012 rx_SetSpecific(tcon, rxcon_ident_key, identP);
1013 /* Check whether the UUID on this connection matches
1014 * the UUID in the host structure. If they don't match
1015 * then this is not the same host as before. */
1016 if ( !host->interface
1017 || !afs_uuid_equal(&interf.uuid, &host->interface->uuid) ) {
1019 ("Host %s:%d has changed its identity, deleting.\n",
1020 afs_inet_ntoa_r(host->host, hoststr), host->port));
1021 host->hostFlags |= HOSTDELETED;
1023 if (!held) h_Release_r(host);
1028 afs_inet_ntoa_r(host->host, hoststr);
1029 ViceLog(0,("CB: WhoAreYou failed for %s:%d, error %d\n",
1030 hoststr, ntohs(host->port), code));
1031 host->hostFlags |= VENUSDOWN;
1033 host->hostFlags |= ALTADDR;
1036 if ( ! (host->hostFlags & ALTADDR) )
1038 /* another thread is doing the initialisation */
1039 ViceLog(125, ("Host %s:%d waiting for host-init to complete\n",
1040 afs_inet_ntoa_r(host->host, hoststr), host->port));
1043 if ( !held) h_Release_r(host);
1044 ViceLog(125, ("Host %s:%d starting h_Lookup again\n",
1045 afs_inet_ntoa_r(host->host, hoststr), host->port));
1048 /* We need to check whether the identity in the host structure
1049 * matches the identity on the connection. If they don't match
1050 * then treat this a new host. */
1051 if ( !(host->Console&1)
1052 && ( ( !identP->valid && host->interface )
1053 || ( identP->valid && !host->interface )
1055 && !afs_uuid_equal(&identP->uuid, &host->interface->uuid) ) ) ) {
1056 /* The host in the cache is not the host for this connection */
1057 host->hostFlags |= HOSTDELETED;
1059 if (!held) h_Release_r(host);
1060 ViceLog(0, ("CB: new identity for host %s:%d, deleting\n",
1061 afs_inet_ntoa_r(host->host, hoststr), host->port));
1065 host = h_Alloc_r(tcon);
1068 h_gethostcps_r(host,FT_ApproxTime());
1069 if (!(host->Console&1)) {
1070 if (!identP || !interfValid) {
1072 code = RXAFSCB_WhoAreYou(host->callback_rxcon, &interf);
1074 if ( code == RXGEN_OPCODE ) {
1075 identP = (struct Identity *)malloc(1);
1077 rx_SetSpecific(tcon, rxcon_ident_key, identP);
1079 ("Host %s:%d does not support WhoAreYou.\n",
1080 afs_inet_ntoa_r(host->host, hoststr), host->port));
1082 } else if (code == 0) {
1084 identP = (struct Identity *)malloc(sizeof(struct Identity));
1086 identP->uuid = interf.uuid;
1087 rx_SetSpecific(tcon, rxcon_ident_key, identP);
1088 ViceLog(25, ("WhoAreYou success on %s:%d\n",
1089 afs_inet_ntoa_r(host->host, hoststr), host->port));
1092 if (code == 0 && !identP->valid) {
1094 code = RXAFSCB_InitCallBackState(host->callback_rxcon);
1096 } else if (code == 0) {
1097 oldHost = h_LookupUuid_r(&identP->uuid);
1099 /* This is a new address for an existing host. Update
1100 * the list of interfaces for the existing host and
1101 * delete the host structure we just allocated. */
1102 if (!(held = h_Held_r(oldHost)))
1105 ViceLog(25, ("CB: new addr %s:%d for old host %s:%d\n",
1106 afs_inet_ntoa_r(host->host, hoststr), host->port,
1107 afs_inet_ntoa_r(oldHost->host, hoststr2), oldHost->port));
1108 host->hostFlags |= HOSTDELETED;
1112 addInterfaceAddr_r(host, haddr);
1114 /* This really is a new host */
1115 hashInsertUuid_r(&identP->uuid, host);
1117 code = RXAFSCB_InitCallBackState3(host->callback_rxcon,
1121 ViceLog(25, ("InitCallBackState3 success on %s:%d\n",
1122 afs_inet_ntoa_r(host->host, hoststr), host->port));
1123 assert(interfValid == 1);
1124 initInterfaceAddr_r(host, &interf);
1129 afs_inet_ntoa_r(host->host, hoststr);
1130 ViceLog(0,("CB: RCallBackConnectBack failed for %s:%d\n",
1131 hoststr, ntohs(host->port)));
1132 host->hostFlags |= VENUSDOWN;
1135 host->hostFlags |= RESETDONE;
1138 host->hostFlags |= ALTADDR;/* host structure iniatilisation complete */
1146 static char localcellname[PR_MAXNAMELEN+1];
1147 char local_realm[AFS_REALM_SZ] = "";
1150 void h_InitHostPackage()
1152 afsconf_GetLocalCell (confDir, localcellname, PR_MAXNAMELEN);
1153 if (!local_realm[0]) {
1154 if (afs_krb_get_lrealm(local_realm, 0) != 0/*KSUCCESS*/) {
1155 ViceLog(0, ("afs_krb_get_lrealm failed, using %s.\n",localcellname));
1156 strcpy (local_realm, localcellname);
1159 rxcon_ident_key = rx_KeyCreate((rx_destructor_t)free);
1160 rxcon_client_key = rx_KeyCreate((rx_destructor_t)0);
1161 #ifdef AFS_PTHREAD_ENV
1162 assert(pthread_mutex_init(&host_glock_mutex, NULL) == 0);
1163 #endif /* AFS_PTHREAD_ENV */
1166 static MapName_r(aname, acell, aval)
1175 afs_int32 anamelen, cnamelen;
1179 anamelen=strlen(aname);
1180 if (anamelen >= PR_MAXNAMELEN)
1181 return -1; /* bad name -- caller interprets this as anonymous, but retries later */
1183 lnames.namelist_len = 1;
1184 lnames.namelist_val = (prname *) aname; /* don't malloc in the common case */
1185 lids.idlist_len = 0;
1186 lids.idlist_val = (afs_int32 *) 0;
1188 cnamelen=strlen(acell);
1190 if (strcasecmp(local_realm, acell) && strcasecmp(localcellname, acell)) {
1191 ViceLog(2, ("MapName: cell is foreign. cell=%s, localcell=%s, localrealm=%s\n",
1192 acell, localcellname, local_realm));
1193 if ((anamelen+cnamelen+1) >= PR_MAXNAMELEN) {
1194 ViceLog(2, ("MapName: Name too long, using AnonymousID for %s@%s\n",
1196 *aval = AnonymousID;
1199 foreign = 1; /* attempt cross-cell authentication */
1200 tname = (char *) malloc(anamelen+cnamelen+2);
1201 strcpy(tname, aname);
1202 tname[anamelen] = '@';
1203 strcpy(tname+anamelen+1, acell);
1204 lnames.namelist_val = (prname *) tname;
1209 code = pr_NameToId(&lnames, &lids);
1212 if (lids.idlist_val) {
1213 *aval = lids.idlist_val[0];
1214 if (*aval == AnonymousID) {
1215 ViceLog(2, ("MapName: NameToId on %s returns anonymousID\n", lnames.namelist_val));
1217 free(lids.idlist_val); /* return parms are not malloced in stub if server proc aborts */
1219 ViceLog(0, ("MapName: NameToId on '%s' is unknown\n", lnames.namelist_val));
1225 free(lnames.namelist_val); /* We allocated this above, so we must free it now. */
1232 /* NOTE: this returns the client with a Shared lock */
1233 struct client *h_ID2Client(vid)
1236 register struct client *client;
1237 register struct host *host;
1241 for (host=hostList; host; host=host->next) {
1242 if (host->hostFlags & HOSTDELETED)
1244 for (client = host->FirstClient; client; client = client->next) {
1245 if (!client->deleted && client->ViceId == vid) {
1248 ObtainSharedLock(&client->lock);
1262 * Called by the server main loop. Returns a h_Held client, which must be
1263 * released later the main loop. Allocates a client if the matching one
1264 * isn't around. The client is returned with its reference count incremented
1265 * by one. The caller must call h_ReleaseClient_r when finished with
1268 struct client *h_FindClient_r(tcon)
1269 struct rx_connection *tcon;
1272 register struct client *client;
1273 register struct host *host;
1274 struct client *oldClient;
1279 #if (64-MAXKTCNAMELEN)
1280 ticket name length != 64
1284 char uname[PR_MAXNAMELEN];
1285 char tcell[MAXKTCREALMLEN];
1288 client = (struct client *) rx_GetSpecific(tcon, rxcon_client_key);
1289 if (client && !client->deleted) {
1291 h_Hold_r(client->host);
1292 if (client->prfail != 2) { /* Could add shared lock on client here */
1293 /* note that we don't have to lock entry in this path to
1294 * ensure CPS is initialized, since we don't call rxr_SetSpecific
1295 * until initialization is done, and we only get here if
1296 * rx_GetSpecific located the client structure.
1301 ObtainWriteLock(&client->lock); /* released at end */
1303 } else if (client) {
1307 authClass = rx_SecurityClassOf((struct rx_connection *)tcon);
1308 ViceLog(5,("FindClient: authenticating connection: authClass=%d\n",
1310 if (authClass == 1) {
1311 /* A bcrypt tickets, no longer supported */
1312 ViceLog(1, ("FindClient: bcrypt ticket, using AnonymousID\n"));
1313 viceid = AnonymousID;
1314 expTime = 0x7fffffff;
1315 } else if (authClass == 2) {
1318 /* kerberos ticket */
1319 code = rxkad_GetServerInfo (tcon, /*level*/0, &expTime,
1320 tname, tinst, tcell, &kvno);
1322 ViceLog(1, ("Failed to get rxkad ticket info\n"));
1323 viceid = AnonymousID;
1324 expTime = 0x7fffffff;
1326 int ilen = strlen(tinst);
1328 ("FindClient: rxkad conn: name=%s,inst=%s,cell=%s,exp=%d,kvno=%d\n",
1329 tname, tinst, tcell, expTime, kvno));
1330 strncpy (uname, tname, sizeof(uname));
1332 if (strlen(uname) + 1 + ilen >= sizeof(uname))
1334 strcat (uname, ".");
1335 strcat (uname, tinst);
1337 /* translate the name to a vice id */
1338 code = MapName_r(uname, tcell, &viceid);
1341 ViceLog(1, ("failed to map name=%s, cell=%s -> code=%d\n",
1342 uname, tcell, code));
1344 viceid = AnonymousID;
1345 expTime = 0x7fffffff;
1349 viceid = AnonymousID; /* unknown security class */
1350 expTime = 0x7fffffff;
1354 host = h_GetHost_r(tcon); /* Returns it h_Held */
1356 /* First try to find the client structure */
1357 for (client = host->FirstClient; client; client = client->next) {
1358 if (!client->deleted && (client->sid == rxr_CidOf(tcon)) &&
1359 (client->VenusEpoch == rxr_GetEpoch(tcon))) {
1360 if (client->tcon && (client->tcon != tcon)) {
1361 ViceLog(0, ("*** Vid=%d, sid=%x, tcon=%x, Tcon=%x ***\n",
1362 client->ViceId, client->sid, client->tcon, tcon));
1363 client->tcon = (struct rx_connection *)0;
1367 ObtainWriteLock(&client->lock);
1373 /* Still no client structure - get one */
1376 ObtainWriteLock(&client->lock);
1377 client->host = host;
1378 client->next = host->FirstClient;
1379 host->FirstClient = client;
1380 #if FS_STATS_DETAILED
1381 client->InSameNetwork = host->InSameNetwork;
1382 #endif /* FS_STATS_DETAILED */
1383 client->ViceId = viceid;
1384 client->expTime = expTime; /* rx only */
1385 client->authClass = authClass; /* rx only */
1386 client->sid = rxr_CidOf(tcon);
1387 client->VenusEpoch = rxr_GetEpoch(tcon);
1388 client->CPS.prlist_val = 0;
1389 client->refCount = 1;
1390 CurrentConnections++; /* increment number of connections */
1393 client->prfail = fail;
1395 if (!(client->CPS.prlist_val) || (viceid != client->ViceId)) {
1396 if (client->CPS.prlist_val && (client->ViceId != ANONYMOUSID)) {
1397 free(client->CPS.prlist_val);
1399 client->CPS.prlist_val = (afs_int32 *)0;
1400 client->ViceId = viceid;
1401 client->expTime = expTime;
1403 if (viceid == ANONYMOUSID) {
1404 client->CPS.prlist_len = AnonCPS.prlist_len;
1405 client->CPS.prlist_val = AnonCPS.prlist_val;
1408 code = pr_GetCPS(viceid, &client->CPS);
1412 ViceLog(0, ("pr_GetCPS failed(%d) for user %d, host %s:%d\n",
1414 afs_inet_ntoa_r(client->host->host, hoststr),
1415 client->host->port));
1417 /* Although ubik_Call (called by pr_GetCPS) traverses thru
1418 * all protection servers and reevaluates things if no
1419 * sync server or quorum is found we could still end up
1420 * with one of these errors. In such case we would like to
1421 * reevaluate the rpc call to find if there's cps for this
1422 * guy. We treat other errors (except network failures
1423 * ones - i.e. code < 0) as an indication that there is no
1424 * CPS for this host. Ideally we could like to deal this
1425 * problem the other way around (i.e. if code == NOCPS
1426 * ignore else retry next time) but the problem is that
1427 * there're other errors (i.e. EPERM) for which we don't
1428 * want to retry and we don't know the whole code list!
1430 if (code < 0 || code == UNOQUORUM || code == UNOTSYNC)
1434 /* the disabling of system:administrators is so iffy and has so many
1435 * possible failure modes that we will disable it again */
1436 /* Turn off System:Administrator for safety
1437 if (AL_IsAMember(SystemId, client->CPS) == 0)
1438 assert(AL_DisableGroup(SystemId, client->CPS) == 0); */
1441 /* Now, tcon may already be set to a rock, since we blocked with no host
1442 * or client locks set above in pr_GetCPS (XXXX some locking is probably
1443 * required). So, before setting the RPC's rock, we should disconnect
1444 * the RPC from the other client structure's rock.
1446 if (oldClient = (struct client *) rx_GetSpecific(tcon, rxcon_client_key)) {
1447 oldClient->tcon = (struct rx_connection *) 0;
1448 /* rx_SetSpecific will be done immediately below */
1450 client->tcon = tcon;
1451 rx_SetSpecific(tcon, rxcon_client_key, client);
1452 ReleaseWriteLock(&client->lock);
1456 } /*h_FindClient_r*/
1458 int h_ReleaseClient_r(client)
1459 struct client *client;
1461 assert(client->refCount > 0);
1468 * Sigh: this one is used to get the client AGAIN within the individual
1469 * server routines. This does not bother h_Holding the host, since
1470 * this is assumed already have been done by the server main loop.
1471 * It does check tokens, since only the server routines can return the
1472 * VICETOKENDEAD error code
1474 int GetClient(tcon, cp)
1475 struct rx_connection * tcon;
1479 register struct client *client;
1483 *cp = client = (struct client *) rx_GetSpecific(tcon, rxcon_client_key);
1485 assert(client && client->tcon && rxr_CidOf(client->tcon) == client->sid);
1487 client->LastCall > client->expTime && client->expTime) {
1489 ViceLog(1, ("Token for %s at %s:%d expired %d\n",
1491 afs_inet_ntoa_r(client->host->host, hoststr),
1492 client->host->port, client->expTime));
1494 return VICETOKENDEAD;
1503 /* Client user name for short term use. Note that this is NOT inexpensive */
1504 char *h_UserName(client)
1505 struct client *client;
1508 static char User[PR_MAXNAMELEN+1];
1512 lids.idlist_len = 1;
1513 lids.idlist_val = (afs_int32 *)malloc(1*sizeof(afs_int32));
1514 lnames.namelist_len = 0;
1515 lnames.namelist_val = (prname *)0;
1516 lids.idlist_val[0] = client->ViceId;
1517 if (pr_IdToName(&lids,&lnames)) {
1518 /* We need to free id we alloced above! */
1519 free(lids.idlist_val);
1520 return "*UNKNOWN USER NAME*";
1522 strncpy(User,lnames.namelist_val[0],PR_MAXNAMELEN);
1523 free(lids.idlist_val);
1524 free(lnames.namelist_val);
1534 ("Total Client entries = %d, blocks = %d; Host entries = %d, blocks = %d\n",
1535 CEs, CEBlocks, HTs, HTBlocks));
1540 static int h_PrintClient(host, held, file)
1541 register struct host *host;
1543 StreamHandle_t *file;
1545 register struct client *client;
1552 if (host->hostFlags & HOSTDELETED) {
1556 sprintf(tmpStr,"Host %s:%d down = %d, LastCall %s",
1557 afs_inet_ntoa_r(host->host, hoststr), host->port,
1558 (host->hostFlags & VENUSDOWN),
1559 afs_ctime((time_t *)&host->LastCall, tbuffer, sizeof(tbuffer)));
1560 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1561 for (client = host->FirstClient; client; client=client->next) {
1562 if (!client->deleted) {
1564 sprintf(tmpStr, " user id=%d, name=%s, sl=%s till %s",
1565 client->ViceId, h_UserName(client),
1566 client->authClass ? "Authenticated" : "Not authenticated",
1568 afs_ctime((time_t *)&client->expTime, tbuffer, sizeof(tbuffer))
1570 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1573 sprintf(tmpStr, " user=%s, no current server connection\n",
1574 h_UserName(client));
1575 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1577 sprintf(tmpStr, " CPS-%d is [", client->CPS.prlist_len);
1578 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1579 if (client->CPS.prlist_val) {
1580 for (i=0; i > client->CPS.prlist_len; i++) {
1581 sprintf(tmpStr, " %d", client->CPS.prlist_val[i]);
1582 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1585 sprintf(tmpStr, "]\n");
1586 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1597 * Print a list of clients, with last security level and token value seen,
1607 StreamHandle_t *file = STREAM_OPEN(AFSDIR_SERVER_CLNTDUMP_FILEPATH, "w");
1610 ViceLog(0, ("Couldn't create client dump file %s\n", AFSDIR_SERVER_CLNTDUMP_FILEPATH));
1613 now = FT_ApproxTime();
1614 sprintf(tmpStr, "List of active users at %s\n",
1615 afs_ctime(&now, tbuffer, sizeof(tbuffer)));
1616 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1617 h_Enumerate(h_PrintClient, (char *)file);
1618 STREAM_REALLYCLOSE(file);
1619 ViceLog(0, ("Created client dump %s\n", AFSDIR_SERVER_CLNTDUMP_FILEPATH));
1625 static int h_DumpHost(host, held, file)
1626 register struct host *host;
1628 StreamHandle_t *file;
1635 sprintf(tmpStr, "ip:%x port:%d hidx:%d cbid:%d lock:%x last:%u active:%u down:%d del:%d cons:%d cldel:%d\n\t hpfailed:%d hcpsCall:%u hcps [",
1636 host->host, host->port, host->index, host->cblist,
1637 CheckLock(&host->lock), host->LastCall, host->ActiveCall,
1638 (host->hostFlags & VENUSDOWN), host->hostFlags&HOSTDELETED,
1639 host->Console, host->hostFlags & CLIENTDELETED,
1640 host->hcpsfailed, host->cpsCall);
1641 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1642 if (host->hcps.prlist_val)
1643 for (i=0; i < host->hcps.prlist_len; i++) {
1644 sprintf(tmpStr, " %d", host->hcps.prlist_val[i]);
1645 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1647 sprintf(tmpStr, "] [");
1648 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1649 if ( host->interface)
1650 for (i=0; i < host->interface->numberOfInterfaces; i++) {
1651 sprintf(tmpStr, " %x", host->interface->addr[i]);
1652 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1654 sprintf(tmpStr, "] holds: ");
1655 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1657 for (i = 0 ; i < h_maxSlots ; i++) {
1658 sprintf(tmpStr, "%04x", host->holds[i]);
1659 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1661 sprintf(tmpStr, " slot/bit: %d/%d\n", h_holdSlot(), h_holdbit());
1662 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1674 StreamHandle_t *file = STREAM_OPEN(AFSDIR_SERVER_HOSTDUMP_FILEPATH, "w");
1679 ViceLog(0, ("Couldn't create host dump file %s\n", AFSDIR_SERVER_HOSTDUMP_FILEPATH));
1682 now = FT_ApproxTime();
1683 sprintf(tmpStr, "List of active hosts at %s\n",
1684 afs_ctime(&now, tbuffer, sizeof(tbuffer)));
1685 STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
1686 h_Enumerate(h_DumpHost, (char *) file);
1687 STREAM_REALLYCLOSE(file);
1688 ViceLog(0, ("Created host dump %s\n", AFSDIR_SERVER_HOSTDUMP_FILEPATH));
1694 * This counts the number of workstations, the number of active workstations,
1695 * and the number of workstations declared "down" (i.e. not heard from
1696 * recently). An active workstation has received a call since the cutoff
1697 * time argument passed.
1699 h_GetWorkStats(nump, activep, delp, cutofftime)
1703 afs_int32 cutofftime;
1707 register struct host *host;
1708 register int num=0, active=0, del=0;
1711 for (host = hostList; host; host = host->next) {
1712 if (!(host->hostFlags & HOSTDELETED)) {
1714 if (host->ActiveCall > cutofftime)
1716 if (host->hostFlags & VENUSDOWN)
1728 } /*h_GetWorkStats*/
1731 /*------------------------------------------------------------------------
1732 * PRIVATE h_ClassifyAddress
1735 * Given a target IP address and a candidate IP address (both
1736 * in host byte order), classify the candidate into one of three
1737 * buckets in relation to the target by bumping the counters passed
1741 * a_targetAddr : Target address.
1742 * a_candAddr : Candidate address.
1743 * a_sameNetOrSubnetP : Ptr to counter to bump when the two
1744 * addresses are either in the same network
1745 * or the same subnet.
1746 * a_diffSubnetP : ...when the candidate is in a different
1748 * a_diffNetworkP : ...when the candidate is in a different
1755 * The target and candidate addresses are both in host byte
1756 * order, NOT network byte order, when passed in.
1760 *------------------------------------------------------------------------*/
1762 static void h_ClassifyAddress(a_targetAddr, a_candAddr, a_sameNetOrSubnetP,
1763 a_diffSubnetP, a_diffNetworkP)
1764 afs_uint32 a_targetAddr;
1765 afs_uint32 a_candAddr;
1766 afs_int32 *a_sameNetOrSubnetP;
1767 afs_int32 *a_diffSubnetP;
1768 afs_int32 *a_diffNetworkP;
1770 { /*h_ClassifyAddress*/
1772 register int i; /*Iterator thru host hash table*/
1773 register struct host *hostP; /*Ptr to current host entry*/
1774 register afs_uint32 currHostAddr; /*Current host address*/
1775 afs_uint32 targetNet;
1776 afs_uint32 targetSubnet;
1778 afs_uint32 candSubnet;
1781 * Put bad values into the subnet info to start with.
1783 targetSubnet = (afs_uint32) 0;
1784 candSubnet = (afs_uint32) 0;
1787 * Pull out the network and subnetwork numbers from the target
1788 * and candidate addresses. We can short-circuit this whole
1789 * affair if the target and candidate addresses are not of the
1792 if (IN_CLASSA(a_targetAddr)) {
1793 if (!(IN_CLASSA(a_candAddr))) {
1794 (*a_diffNetworkP)++;
1797 targetNet = a_targetAddr & IN_CLASSA_NET;
1798 candNet = a_candAddr & IN_CLASSA_NET;
1799 if (IN_SUBNETA(a_targetAddr))
1800 targetSubnet = a_targetAddr & IN_CLASSA_SUBNET;
1801 if (IN_SUBNETA(a_candAddr))
1802 candSubnet = a_candAddr & IN_CLASSA_SUBNET;
1805 if (IN_CLASSB(a_targetAddr)) {
1806 if (!(IN_CLASSB(a_candAddr))) {
1807 (*a_diffNetworkP)++;
1810 targetNet = a_targetAddr & IN_CLASSB_NET;
1811 candNet = a_candAddr & IN_CLASSB_NET;
1812 if (IN_SUBNETB(a_targetAddr))
1813 targetSubnet = a_targetAddr & IN_CLASSB_SUBNET;
1814 if (IN_SUBNETB(a_candAddr))
1815 candSubnet = a_candAddr & IN_CLASSB_SUBNET;
1816 } /*Class B target*/
1818 if (IN_CLASSC(a_targetAddr)) {
1819 if (!(IN_CLASSC(a_candAddr))) {
1820 (*a_diffNetworkP)++;
1823 targetNet = a_targetAddr & IN_CLASSC_NET;
1824 candNet = a_candAddr & IN_CLASSC_NET;
1827 * Note that class C addresses can't have subnets,
1828 * so we leave the defaults untouched.
1830 } /*Class C target*/
1832 targetNet = a_targetAddr;
1833 candNet = a_candAddr;
1834 } /*Class D address*/
1837 * Now, simply compare the extracted net and subnet values for
1838 * the two addresses (which at this point are known to be of the
1841 if (targetNet == candNet) {
1842 if (targetSubnet == candSubnet)
1843 (*a_sameNetOrSubnetP)++;
1848 (*a_diffNetworkP)++;
1850 } /*h_ClassifyAddress*/
1853 /*------------------------------------------------------------------------
1854 * EXPORTED h_GetHostNetStats
1857 * Iterate through the host table, and classify each (non-deleted)
1858 * host entry into ``proximity'' categories (same net or subnet,
1859 * different subnet, different network).
1862 * a_numHostsP : Set to total number of (non-deleted) hosts.
1863 * a_sameNetOrSubnetP : Set to # hosts on same net/subnet as server.
1864 * a_diffSubnetP : Set to # hosts on diff subnet as server.
1865 * a_diffNetworkP : Set to # hosts on diff network as server.
1871 * We only count non-deleted hosts. The storage pointed to by our
1872 * parameters is zeroed upon entry.
1876 *------------------------------------------------------------------------*/
1878 void h_GetHostNetStats(a_numHostsP, a_sameNetOrSubnetP, a_diffSubnetP,
1880 afs_int32 *a_numHostsP;
1881 afs_int32 *a_sameNetOrSubnetP;
1882 afs_int32 *a_diffSubnetP;
1883 afs_int32 *a_diffNetworkP;
1885 { /*h_GetHostNetStats*/
1887 register struct host *hostP; /*Ptr to current host entry*/
1888 register afs_uint32 currAddr_HBO; /*Curr host addr, host byte order*/
1891 * Clear out the storage pointed to by our parameters.
1893 *a_numHostsP = (afs_int32) 0;
1894 *a_sameNetOrSubnetP = (afs_int32) 0;
1895 *a_diffSubnetP = (afs_int32) 0;
1896 *a_diffNetworkP = (afs_int32) 0;
1899 for (hostP = hostList; hostP; hostP = hostP->next) {
1900 if (!(hostP->hostFlags & HOSTDELETED)) {
1902 * Bump the number of undeleted host entries found.
1903 * In classifying the current entry's address, make
1904 * sure to first convert to host byte order.
1907 currAddr_HBO = (afs_uint32)ntohl(hostP->host);
1908 h_ClassifyAddress(FS_HostAddr_HBO,
1913 } /*Only look at non-deleted hosts*/
1914 } /*For each host record hashed to this index*/
1917 } /*h_GetHostNetStats*/
1919 static afs_uint32 checktime;
1920 static afs_uint32 clientdeletetime;
1921 static struct AFSFid zerofid;
1925 * XXXX: This routine could use Multi-R to avoid serializing the timeouts.
1926 * Since it can serialize them, and pile up, it should be a separate LWP
1927 * from other events.
1929 int CheckHost(host, held)
1930 register struct host *host;
1934 register struct client *client;
1935 struct interfaceAddr interf;
1938 /* Host is held by h_Enumerate */
1940 for (client = host->FirstClient; client; client = client->next) {
1941 if (client->refCount == 0 && client->LastCall < clientdeletetime) {
1942 client->deleted = 1;
1943 host->hostFlags |= CLIENTDELETED;
1946 if (host->LastCall < checktime) {
1948 if (!(host->hostFlags & HOSTDELETED)) {
1949 if (host->LastCall < clientdeletetime) {
1950 host->hostFlags |= HOSTDELETED;
1951 if (!(host->hostFlags & VENUSDOWN)) {
1952 host->hostFlags &= ~ALTADDR; /* alternate address invalid*/
1953 if (host->interface) {
1955 code = RXAFSCB_InitCallBackState3(host->callback_rxcon,
1960 code = RXAFSCB_InitCallBackState(host->callback_rxcon);
1963 host->hostFlags |= ALTADDR; /* alternate addresses valid */
1967 afs_inet_ntoa_r(host->host, hoststr);
1969 ("CB: RCallBackConnectBack (host.c) failed for host %s:%d\n",
1970 hoststr, ntohs(host->port)));
1971 host->hostFlags |= VENUSDOWN;
1973 /* Note: it's safe to delete hosts even if they have call
1974 * back state, because break delayed callbacks (called when a
1975 * message is received from the workstation) will always send a
1976 * break all call backs to the workstation if there is no
1982 if (!(host->hostFlags & VENUSDOWN) && host->cblist) {
1983 if (host->interface) {
1984 afsUUID uuid = host->interface->uuid;
1986 code = RXAFSCB_ProbeUuid(host->callback_rxcon, &uuid);
1989 if ( MultiProbeAlternateAddress_r(host) ) {
1991 afs_inet_ntoa_r(host->host, hoststr);
1993 ("ProbeUuid failed for host %s:%d\n",
1994 hoststr, ntohs(host->port)));
1995 host->hostFlags |= VENUSDOWN;
2000 code = RXAFSCB_Probe(host->callback_rxcon);
2004 afs_inet_ntoa_r(host->host, hoststr);
2005 ViceLog(0, ("ProbeUuid failed for host %s:%d\n",
2006 hoststr, ntohs(host->port)));
2007 host->hostFlags |= VENUSDOWN;
2022 * Set VenusDown for any hosts that have not had a call in 15 minutes and
2023 * don't respond to a probe. Note that VenusDown can only be cleared if
2024 * a message is received from the host (see ServerLWP in file.c).
2025 * Delete hosts that have not had any calls in 1 hour, clients that
2026 * have not had any calls in 15 minutes.
2028 * This routine is called roughly every 5 minutes.
2032 afs_uint32 now = FT_ApproxTime();
2034 memset((char *)&zerofid, 0, sizeof(zerofid));
2036 * Send a probe to the workstation if it hasn't been heard from in
2039 checktime = now - 15*60;
2040 clientdeletetime = now - 120*60; /* 2 hours ago */
2041 h_Enumerate(CheckHost, (char *) 0);
2046 * This is called with host locked and held. At this point, the
2047 * hostHashTable should not be having entries for the alternate
2048 * interfaces. This function has to insert these entries in the
2051 * The addresses in the ineterfaceAddr list are in host byte order.
2054 initInterfaceAddr_r(host, interf)
2056 struct interfaceAddr *interf;
2060 afs_int32 myPort, myHost;
2062 struct Interface *interface;
2067 ViceLog(125,("initInterfaceAddr : host %x numAddr %d\n",
2068 host->host, interf->numberOfInterfaces));
2070 number = interf->numberOfInterfaces;
2071 myPort = host->port;
2072 myHost = host->host; /* current interface address */
2074 /* validation checks */
2077 ViceLog(0,("Number of alternate addresses returned is %d\n",
2083 * Convert IP addresses to network byte order, and remove for
2084 * duplicate IP addresses from the interface list.
2086 for (i = 0, count = 0, found = 0; i < number; i++)
2088 interf->addr_in[i] = htonl(interf->addr_in[i]);
2089 for (j = 0 ; j < count ; j++) {
2090 if (interf->addr_in[j] == interf->addr_in[i])
2094 interf->addr_in[count] = interf->addr_in[i];
2095 if (interf->addr_in[count] == myHost)
2102 * Allocate and initialize an interface structure for this host.
2105 interface = (struct Interface *)
2106 malloc(sizeof(struct Interface) +
2107 (sizeof(afs_int32) * (count-1)));
2109 interface->numberOfInterfaces = count;
2111 interface = (struct Interface *)
2112 malloc(sizeof(struct Interface) +
2113 (sizeof(afs_int32) * count));
2115 interface->numberOfInterfaces = count + 1;
2116 interface->addr[count] = myHost;
2118 interface->uuid = interf->uuid;
2119 for (i = 0 ; i < count ; i++)
2120 interface->addr[i] = interf->addr_in[i];
2122 assert(!host->interface);
2123 host->interface = interface;
2125 for ( i=0; i < host->interface->numberOfInterfaces; i++)
2127 ViceLog(125,("--- alt address %x\n", host->interface->addr[i]));
2134 * This is called with host locked and held. At this point, the
2135 * hostHashTable should not be having entries for the alternate
2136 * interfaces. This function has to insert these entries in the
2139 * All addresses are in network byte order.
2142 addInterfaceAddr_r(host, addr)
2149 struct Interface *interface;
2152 assert(host->interface);
2154 ViceLog(125,("addInterfaceAddr : host %x addr %d\n",
2158 * Make sure this address is on the list of known addresses
2161 number = host->interface->numberOfInterfaces;
2162 for ( i=0, found=0; i < number && !found; i++)
2164 if ( host->interface->addr[i] == addr)
2168 interface = (struct Interface *)
2169 malloc(sizeof(struct Interface) +
2170 (sizeof(afs_int32) * number));
2171 interface->numberOfInterfaces = number + 1;
2172 interface->uuid = host->interface->uuid;
2173 for (i = 0 ; i < number ; i++)
2174 interface->addr[i] = host->interface->addr[i];
2175 interface->addr[number] = addr;
2176 free(host->interface);
2177 host->interface = interface;
2181 * Create a hash table entry for this address
2183 hashInsert_r(addr, host);
2188 /* inserts a new HashChain structure corresponding to this address */
2189 hashInsert_r(addr, host)
2194 struct h_hashChain* chain;
2196 /* hash into proper bucket */
2197 index = h_HashIndex(addr);
2199 /* insert into beginning of list for this bucket */
2200 chain = (struct h_hashChain *)malloc(sizeof(struct h_hashChain));
2202 chain->hostPtr = host;
2203 chain->next = hostHashTable[index];
2205 hostHashTable[index] = chain;
2209 /* inserts a new HashChain structure corresponding to this UUID */
2210 hashInsertUuid_r(uuid, host)
2211 struct afsUUID *uuid;
2215 struct h_hashChain* chain;
2217 /* hash into proper bucket */
2218 index = h_UuidHashIndex(uuid);
2220 /* insert into beginning of list for this bucket */
2221 chain = (struct h_hashChain *)malloc(sizeof(struct h_hashChain));
2223 chain->hostPtr = host;
2224 chain->next = hostUuidHashTable[index];
2225 hostUuidHashTable[index] = chain;
2228 /* deleted a HashChain structure for this address and host */
2229 /* returns 1 on success */
2231 hashDelete_r(addr, host)
2237 register struct h_hashChain **hp, *th;
2239 for (hp = &hostHashTable[h_HashIndex(addr)]; th = *hp; )
2241 assert(th->hostPtr);
2242 if (th->hostPtr == host && th->addr == addr)
2257 ** prints out all alternate interface address for the host. The 'level'
2258 ** parameter indicates what level of debugging sets this output
2260 printInterfaceAddr(host, level)
2265 if ( host-> interface )
2267 /* check alternate addresses */
2268 number = host->interface->numberOfInterfaces;
2269 assert( number > 0 );
2270 for ( i=0; i < number; i++)
2271 ViceLog(level, ("%x ", host->interface->addr[i]));
2273 ViceLog(level, ("\n"));