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
9 * Portions Copyright (c) 2006 Sine Nomine Associates
12 #include <afsconfig.h>
13 #include <afs/param.h>
20 #ifdef HAVE_SYS_FILE_H
24 #include <afs/afsint.h>
25 #define FSINT_COMMON_XG
26 #include <afs/afscbint.h>
27 #include <afs/rxgen_consts.h>
29 #include <afs/errors.h>
30 #include <afs/ihandle.h>
32 #include <afs/ptclient.h>
33 #include <afs/ptuser.h>
34 #include <afs/prs_fs.h>
36 #include <afs/afsutil.h>
37 #include <afs/com_err.h>
39 #include <afs/cellconfig.h>
40 #include "viced_prototypes.h"
44 #ifdef AFS_DEMAND_ATTACH_FS
45 #include "../util/afsutil_prototypes.h"
46 #include "serialize_state.h"
47 #endif /* AFS_DEMAND_ATTACH_FS */
49 pthread_mutex_t host_glock_mutex;
52 extern int CurrentConnections;
54 extern int AnonymousID;
55 extern prlist AnonCPS;
56 extern struct afsconf_dir *confDir; /* config dir object */
57 extern int lwps; /* the max number of server threads */
58 extern afsUUID FS_HostUUID;
59 extern char *FS_configPath;
62 int CEs = 0; /* active clients */
63 int CEBlocks = 0; /* number of blocks of CEs */
64 struct client *CEFree = 0; /* first free client */
65 struct host *hostList = 0; /* linked list of all hosts */
66 int hostCount = 0; /* number of hosts in hostList */
70 static struct rx_securityClass *sc = NULL;
71 static int h_quota_limit;
73 /* arguments for PerHost_EnumerateClient enumeration */
74 struct enumclient_args {
76 int (*proc)(struct client *client, void *rock);
80 static void h_SetupCallbackConn_r(struct host * host);
81 static int h_threadquota(int);
82 static int initInterfaceAddr_r(struct host *, struct interfaceAddr *);
84 #define CESPERBLOCK 73
85 struct CEBlock { /* block of CESPERBLOCK file entries */
86 struct client entry[CESPERBLOCK];
89 void h_TossStuff_r(struct host *host);
92 * Make sure the subnet macros have been defined.
95 #define IN_SUBNETA(i) ((((afs_int32)(i))&0x80800000)==0x00800000)
98 #ifndef IN_CLASSA_SUBNET
99 #define IN_CLASSA_SUBNET 0xffff0000
103 #define IN_SUBNETB(i) ((((afs_int32)(i))&0xc0008000)==0x80008000)
106 #ifndef IN_CLASSB_SUBNET
107 #define IN_CLASSB_SUBNET 0xffffff00
110 #define hostBusyFlags(hf) \
111 ((hf) & (HWHO_INPROGRESS | HCPS_INPROGRESS | HCPS_WAITING) \
112 || !((hf) & ALTADDR))
114 /* get a new block of CEs and chain it on CEFree */
118 struct CEBlock *block;
121 block = malloc(sizeof(struct CEBlock));
123 ViceLog(0, ("Failed malloc in GetCEBlock\n"));
124 ShutDownAndCore(PANIC);
127 for (i = 0; i < (CESPERBLOCK - 1); i++) {
128 Lock_Init(&block->entry[i].lock);
129 block->entry[i].z.next = &(block->entry[i + 1]);
131 block->entry[CESPERBLOCK - 1].z.next = 0;
132 Lock_Init(&block->entry[CESPERBLOCK - 1].lock);
133 CEFree = (struct client *)block;
139 /* get the next available CE */
140 static struct client *
143 struct client *entry;
148 ViceLog(0, ("CEFree NULL in GetCE\n"));
149 ShutDownAndCore(PANIC);
153 CEFree = entry->z.next;
155 memset(&entry->z, 0, sizeof(struct client_to_zero));
161 /* return an entry to the free list */
163 FreeCE(struct client *entry)
165 entry->z.VenusEpoch = 0;
167 entry->z.next = CEFree;
174 * The HTs and HTBlocks variables were formerly static, but they are
175 * now referenced elsewhere in the FileServer.
177 int HTs = 0; /* active file entries */
178 int HTBlocks = 0; /* number of blocks of HTs */
179 static struct host *HTFree = 0; /* first free file entry */
182 * Hash tables of host pointers. We need two tables, one
183 * to map IP addresses onto host pointers, and another
184 * to map host UUIDs onto host pointers.
186 static struct h_AddrHashChain *hostAddrHashTable[h_HASHENTRIES];
187 static struct h_UuidHashChain *hostUuidHashTable[h_HASHENTRIES];
188 #define h_HashIndex(hostip) (ntohl(hostip) & (h_HASHENTRIES-1))
189 #define h_UuidHashIndex(uuidp) (((int)(afs_uuid_hash(uuidp))) & (h_HASHENTRIES-1))
191 struct HTBlock { /* block of HTSPERBLOCK file entries */
192 struct host entry[h_HTSPERBLOCK];
196 /* get a new block of HTs and chain it on HTFree */
200 struct HTBlock *block;
202 static int index = 0;
204 if (HTBlocks == h_MAXHOSTTABLES) {
205 ViceLog(0, ("h_MAXHOSTTABLES reached\n"));
209 block = malloc(sizeof(struct HTBlock));
211 ViceLog(0, ("Failed malloc in GetHTBlock\n"));
212 ShutDownAndCore(PANIC);
214 for (i = 0; i < (h_HTSPERBLOCK); i++)
215 opr_cv_init(&block->entry[i].cond);
216 for (i = 0; i < (h_HTSPERBLOCK); i++)
217 Lock_Init(&block->entry[i].lock);
218 for (i = 0; i < (h_HTSPERBLOCK - 1); i++)
219 block->entry[i].z.next = &(block->entry[i + 1]);
220 for (i = 0; i < (h_HTSPERBLOCK); i++)
221 block->entry[i].index = index++;
222 block->entry[h_HTSPERBLOCK - 1].z.next = 0;
223 HTFree = (struct host *)block;
224 hosttableptrs[HTBlocks++] = block->entry;
229 /* get the next available HT */
240 HTFree = entry->z.next;
242 memset(&entry->z, 0, sizeof(struct host_to_zero));
248 /* return an entry to the free list */
250 FreeHT(struct host *entry)
252 entry->z.next = HTFree;
259 hpr_Initialize(struct ubik_client **uclient)
261 afs_int32 code, code2;
262 struct rx_connection *serverconns[MAXSERVERS];
263 struct rx_securityClass *sc;
264 struct afsconf_dir *tdir;
266 struct afsconf_cell info;
270 tdir = afsconf_Open(FS_configPath);
273 ("hpr_Initialize: Could not open configuration directory: %s\n",
278 code = afsconf_GetLocalCell(tdir, cellstr, sizeof(cellstr));
280 ViceLog(0, ("hpr_Initialize: Could not get local cell. [%d]\n", code));
285 code = afsconf_GetCellInfo(tdir, cellstr, "afsprot", &info);
287 ViceLog(0, ("hpr_Initialize: Could not locate cell %s in %s/%s\n",
288 cellstr, tdir->name, AFSDIR_CELLSERVDB_FILE));
295 ViceLog(0, ("hpr_Initialize: Could not initialize rx.\n"));
300 /* Most callers use secLevel==1, however, the fileserver uses secLevel==2
301 * to force use of the KeyFile. secLevel == 0 implies -noauth was
303 code = afsconf_ClientAuthSecure(tdir, &sc, &scIndex);
305 ViceLog(0, ("hpr_Initialize: clientauthsecure returns %d %s "
306 "(so trying noauth)\n", code, afs_error_message(code)));
307 scIndex = RX_SECIDX_NULL;
308 sc = rxnull_NewClientSecurityObject();
311 if (scIndex == RX_SECIDX_NULL)
312 ViceLog(0, ("hpr_Initialize: Could not get afs tokens, "
313 "running unauthenticated. [%d]\n", code));
315 memset(serverconns, 0, sizeof(serverconns)); /* terminate list!!! */
316 for (i = 0; i < info.numServers; i++) {
318 rx_NewConnection(info.hostAddr[i].sin_addr.s_addr,
319 info.hostAddr[i].sin_port, PRSRV,
323 code = ubik_ClientInit(serverconns, uclient);
325 ViceLog(0, ("hpr_Initialize: ubik client init failed. [%d]\n", code));
328 code2 = rxs_Release(sc);
337 hpr_End(struct ubik_client *uclient)
342 code = ubik_ClientDestroy(uclient);
348 getThreadClient(struct ubik_client **client)
352 *client = pthread_getspecific(viced_uclient_key);
356 code = hpr_Initialize(client);
360 opr_Verify(pthread_setspecific(viced_uclient_key, *client) == 0);
366 hpr_GetHostCPS(afs_int32 host, prlist *CPS)
370 struct ubik_client *uclient;
372 code = getThreadClient(&uclient);
377 code = ubik_PR_GetHostCPS(uclient, 0, host, CPS, &over);
378 if (code != PRSUCCESS)
381 /* do something about this, probably make a new call */
382 /* don't forget there's a hard limit in the interface */
384 "membership list for host id %d exceeds display limit\n",
391 hpr_NameToId(namelist *names, idlist *ids)
395 struct ubik_client *uclient;
397 code = getThreadClient(&uclient);
401 for (i = 0; i < names->namelist_len; i++)
402 stolower(names->namelist_val[i]);
403 code = ubik_PR_NameToID(uclient, 0, names, ids);
408 hpr_IdToName(idlist *ids, namelist *names)
411 struct ubik_client *uclient;
413 code = getThreadClient(&uclient);
417 code = string_PR_IDToName(uclient, 0, ids, names);
422 hpr_GetCPS(afs_int32 id, prlist *CPS)
426 struct ubik_client *uclient;
428 code = getThreadClient(&uclient);
433 code = ubik_PR_GetCPS(uclient, 0, id, CPS, &over);
434 if (code != PRSUCCESS)
437 /* do something about this, probably make a new call */
438 /* don't forget there's a hard limit in the interface */
439 fprintf(stderr, "membership list for id %d exceeds display limit\n",
445 static short consolePort = 0;
448 h_Lock_r(struct host *host)
458 * returns 1 if already locked
459 * else returns locks and returns 0
463 h_NBLock_r(struct host *host)
465 struct Lock *hostLock = &host->lock;
470 if (!(hostLock->excl_locked) && !(hostLock->readers_reading))
471 hostLock->excl_locked = WRITE_LOCK;
475 LOCK_UNLOCK(hostLock);
484 /*------------------------------------------------------------------------
485 * PRIVATE h_AddrInSameNetwork
488 * Given a target IP address and a candidate IP address (both
489 * in host byte order), return a non-zero value (1) if the
490 * candidate address is in a different network from the target
494 * a_targetAddr : Target address.
495 * a_candAddr : Candidate address.
498 * 1 if the candidate address is in the same net as the target,
502 * The target and candidate addresses are both in host byte
503 * order, NOT network byte order, when passed in. We return
504 * our value as a character, since that's the type of field in
505 * the host structure, where this info will be stored.
509 *------------------------------------------------------------------------*/
512 h_AddrInSameNetwork(afs_uint32 a_targetAddr, afs_uint32 a_candAddr)
513 { /*h_AddrInSameNetwork */
515 afs_uint32 targetNet;
519 * Pull out the network and subnetwork numbers from the target
520 * and candidate addresses. We can short-circuit this whole
521 * affair if the target and candidate addresses are not of the
524 if (IN_CLASSA(a_targetAddr)) {
525 if (!(IN_CLASSA(a_candAddr))) {
528 targetNet = a_targetAddr & IN_CLASSA_NET;
529 candNet = a_candAddr & IN_CLASSA_NET;
530 } else if (IN_CLASSB(a_targetAddr)) {
531 if (!(IN_CLASSB(a_candAddr))) {
534 targetNet = a_targetAddr & IN_CLASSB_NET;
535 candNet = a_candAddr & IN_CLASSB_NET;
536 } /*Class B target */
537 else if (IN_CLASSC(a_targetAddr)) {
538 if (!(IN_CLASSC(a_candAddr))) {
541 targetNet = a_targetAddr & IN_CLASSC_NET;
542 candNet = a_candAddr & IN_CLASSC_NET;
543 } /*Class C target */
545 targetNet = a_targetAddr;
546 candNet = a_candAddr;
547 } /*Class D address */
550 * Now, simply compare the extracted net values for the two addresses
551 * (which at this point are known to be of the same class)
553 if (targetNet == candNet)
558 } /*h_AddrInSameNetwork */
561 /* Assumptions: called with held host */
563 h_gethostcps_r(struct host *host, afs_int32 now)
568 /* wait if somebody else is already doing the getCPS call */
569 while (host->z.hostFlags & HCPS_INPROGRESS) {
570 slept = 1; /* I did sleep */
571 host->z.hostFlags |= HCPS_WAITING; /* I am sleeping now */
572 opr_cv_wait(&host->cond, &host_glock_mutex);
576 host->z.hostFlags |= HCPS_INPROGRESS; /* mark as CPSCall in progress */
577 if (host->z.hcps.prlist_val)
578 free(host->z.hcps.prlist_val); /* this is for hostaclRefresh */
579 host->z.hcps.prlist_val = NULL;
580 host->z.hcps.prlist_len = 0;
581 host->z.cpsCall = slept ? time(NULL) : (now);
584 code = hpr_GetHostCPS(ntohl(host->z.host), &host->z.hcps);
589 * Although ubik_Call (called by pr_GetHostCPS) traverses thru all protection servers
590 * and reevaluates things if no sync server or quorum is found we could still end up
591 * with one of these errors. In such case we would like to reevaluate the rpc call to
592 * find if there's cps for this guy. We treat other errors (except network failures
593 * ones - i.e. code < 0) as an indication that there is no CPS for this host. Ideally
594 * we could like to deal this problem the other way around (i.e. if code == NOCPS
595 * ignore else retry next time) but the problem is that there're other errors (i.e.
596 * EPERM) for which we don't want to retry and we don't know the whole code list!
598 if (code < 0 || code == UNOQUORUM || code == UNOTSYNC) {
600 * We would have preferred to use a while loop and try again since ops in protected
601 * acls for this host will fail now but they'll be reevaluated on any subsequent
602 * call. The attempt to wait for a quorum/sync site or network error won't work
603 * since this problems really should only occurs during a complete fileserver
604 * restart. Since the fileserver will start before the ptservers (and thus before
605 * quorums are complete) clients will be utilizing all the fileserver's lwps!!
607 host->z.hcpsfailed = 1;
609 ("Warning: GetHostCPS failed (%d) for %p (%s:%d); will retry\n",
610 code, host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
612 host->z.hcpsfailed = 0;
614 ("gethost: GetHostCPS failed (%d) for %p (%s:%d); ignored\n",
615 code, host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
617 if (host->z.hcps.prlist_val)
618 free(host->z.hcps.prlist_val);
619 host->z.hcps.prlist_val = NULL;
620 host->z.hcps.prlist_len = 0; /* Make sure it's zero */
622 host->z.hcpsfailed = 0;
624 host->z.hostFlags &= ~HCPS_INPROGRESS;
625 /* signal all who are waiting */
626 if (host->z.hostFlags & HCPS_WAITING) { /* somebody is waiting */
627 host->z.hostFlags &= ~HCPS_WAITING;
628 opr_cv_broadcast(&host->cond);
632 /* args in net byte order */
634 h_flushhostcps(afs_uint32 hostaddr, afs_uint16 hport)
639 h_Lookup_r(hostaddr, hport, &host);
641 host->z.hcpsfailed = 1;
650 * Allocate a host. It will be identified by the peer (ip,port) info in the
651 * rx connection provided. The host is returned held and locked
653 #define DEF_ROPCONS 2115
656 h_Alloc_r(struct rx_connection *r_con)
658 struct servent *serverentry;
660 afs_uint32 newHostAddr_HBO; /*New host IP addr, in host byte order */
667 /* acquire the host lock withot dropping H_LOCK. we can do this here
668 * because we know we will not block; we just created this host and
669 * nobody else knows about it. */
670 ObtainWriteLock(&host->lock);
672 host->z.host = rxr_HostOf(r_con);
673 host->z.port = rxr_PortOf(r_con);
675 h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
677 if (consolePort == 0) { /* find the portal number for console */
678 #if defined(AFS_OSF_ENV)
679 serverentry = getservbyname("ropcons", "");
681 serverentry = getservbyname("ropcons", 0);
684 consolePort = serverentry->s_port;
686 consolePort = htons(DEF_ROPCONS); /* Use a default */
688 if (host->z.port == consolePort)
690 /* Make a callback channel even for the console, on the off chance that it
691 * makes a request that causes a break call back. It shouldn't. */
692 h_SetupCallbackConn_r(host);
693 host->z.LastCall = host->z.cpsCall = host->z.ActiveCall = time(NULL);
694 host->z.hostFlags = 0;
695 host->z.hcps.prlist_val = NULL;
696 host->z.hcps.prlist_len = 0;
697 host->z.interface = NULL;
699 host->z.hcpsfailed = 0; /* save cycles */
700 h_gethostcps(host); /* do this under host hold/lock */
702 host->z.FirstClient = NULL;
703 h_InsertList_r(host); /* update global host List */
705 * Compare the new host's IP address (in host byte order) with ours
706 * (the File Server's), remembering if they are in the same network.
708 newHostAddr_HBO = (afs_uint32) ntohl(host->z.host);
709 host->z.InSameNetwork =
710 h_AddrInSameNetwork(FS_HostAddr_HBO, newHostAddr_HBO);
717 /* Make a callback channel even for the console, on the off chance that it
718 * makes a request that causes a break call back. It shouldn't. */
720 h_SetupCallbackConn_r(struct host * host)
723 sc = rxnull_NewClientSecurityObject();
724 host->z.callback_rxcon =
725 rx_NewConnection(host->z.host, host->z.port, 1, sc, 0);
726 rx_SetConnDeadTime(host->z.callback_rxcon, 50);
727 rx_SetConnHardDeadTime(host->z.callback_rxcon, AFS_HARDDEADTIME);
731 * Lookup a host given an IP address and UDP port number.
732 * hostaddr and hport are in network order
733 * hostaddr and hport are in network order
734 * On return, refCount is incremented.
737 h_Lookup_r(afs_uint32 haddr, afs_uint16 hport, struct host **hostp)
740 struct host *host = NULL;
741 struct h_AddrHashChain *chain;
742 int index = h_HashIndex(haddr);
743 extern int hostaclRefresh;
746 for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
747 host = chain->hostPtr;
749 if (!(host->z.hostFlags & HOSTDELETED) && chain->addr == haddr
750 && chain->port == hport) {
751 if ((host->z.hostFlags & HWHO_INPROGRESS) &&
752 h_threadquota(host->lock.num_waiting)) {
758 if (host->z.hostFlags & HOSTDELETED) {
765 now = time(NULL); /* always evaluate "now" */
766 if (host->z.hcpsfailed || (host->z.cpsCall + hostaclRefresh < now)) {
768 * Every hostaclRefresh period (def 2 hrs) get the new
769 * membership list for the host. Note this could be the
770 * first time that the host is added to a group. Also
771 * here we also retry on previous legitimate hcps failures.
773 * If we get here refCount is elevated.
775 h_gethostcps_r(host, now);
785 /* Lookup a host given its UUID. */
787 h_LookupUuid_r(afsUUID * uuidp)
789 struct host *host = 0;
790 struct h_UuidHashChain *chain;
791 int index = h_UuidHashIndex(uuidp);
793 for (chain = hostUuidHashTable[index]; chain; chain = chain->next) {
794 host = chain->hostPtr;
796 if (!(host->z.hostFlags & HOSTDELETED) && host->z.interface
797 && afs_uuid_equal(&host->z.interface->uuid, uuidp)) {
805 /* h_TossStuff_r: Toss anything in the host structure (the host or
806 * clients marked for deletion. Called from h_Release_r ONLY.
807 * To be called, there must be no holds, and either host->z.deleted
808 * or host->clientDeleted must be set.
811 h_TossStuff_r(struct host *host)
813 struct client **cp, *client;
817 if ((host->z.hostFlags & HOSTDELETED)) {
821 /* make sure host doesn't go away over h_NBLock_r */
824 code = h_NBLock_r(host);
826 /* don't use h_Release_r, since that may call h_TossStuff_r again */
829 /* if somebody still has this host locked */
833 /* someone locked the host while HOSTDELETED was set; that is bad */
834 ViceLog(0, ("Warning: h_TossStuff_r failed; Host %" AFS_PTR_FMT
835 " (%s:%d flags 0x%x) was locked.\n",
836 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
837 (unsigned)host->z.hostFlags));
844 /* if somebody still has this host held */
845 /* we must check this _after_ h_NBLock_r, since h_NBLock_r can drop and
846 * reacquire H_LOCK */
847 if (host->z.refCount > 0) {
850 /* someone grabbed a ref while HOSTDELETED was set; that is bad */
851 ViceLog(0, ("Warning: h_TossStuff_r failed; Host %" AFS_PTR_FMT
852 " (%s:%d flags 0x%x) was held.\n",
853 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
854 (unsigned)host->z.hostFlags));
859 /* ASSUMPTION: rxi_FreeConnection() does not yield */
860 for (cp = &host->z.FirstClient; (client = *cp);) {
861 if ((host->z.hostFlags & HOSTDELETED) || client->z.deleted) {
863 ObtainWriteLockNoBlock(&client->lock, code);
867 ("Warning: h_TossStuff_r failed: Host %p (%s:%d) "
868 "client %p was locked.\n",
869 host, afs_inet_ntoa_r(host->z.host, hoststr),
870 ntohs(host->z.port), client));
874 if (client->z.refCount) {
877 ("Warning: h_TossStuff_r failed: Host %p (%s:%d) "
878 "client %p refcount %d.\n",
879 host, afs_inet_ntoa_r(host->z.host, hoststr),
880 ntohs(host->z.port), client, client->z.refCount));
881 /* This is the same thing we do if the host is locked */
882 ReleaseWriteLock(&client->lock);
885 client->z.CPS.prlist_len = 0;
886 if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
887 free(client->z.CPS.prlist_val);
888 client->z.CPS.prlist_val = NULL;
889 CurrentConnections--;
890 *cp = client->z.next;
891 ReleaseWriteLock(&client->lock);
894 cp = &client->z.next;
897 /* We've just cleaned out all the deleted clients; clear the flag */
898 host->z.hostFlags &= ~CLIENTDELETED;
900 if (host->z.hostFlags & HOSTDELETED) {
901 struct rx_connection *rxconn;
902 struct AddrPort hostAddrPort;
905 if (host->z.Console & 1)
907 if ((rxconn = host->z.callback_rxcon)) {
908 host->z.callback_rxcon = (struct rx_connection *)0;
909 rx_DestroyConnection(rxconn);
911 if (host->z.hcps.prlist_val)
912 free(host->z.hcps.prlist_val);
913 host->z.hcps.prlist_val = NULL;
914 host->z.hcps.prlist_len = 0;
915 free(host->z.tmay_caps.Capabilities_val);
916 host->z.tmay_caps.Capabilities_val = NULL;
917 host->z.tmay_caps.Capabilities_len = 0;
918 DeleteAllCallBacks_r(host, 1);
919 host->z.hostFlags &= ~RESETDONE; /* just to be safe */
921 /* if alternate addresses do not exist */
922 if (!(host->z.interface)) {
923 h_DeleteHostFromAddrHashTable_r(host->z.host, host->z.port, host);
925 h_DeleteHostFromUuidHashTable_r(host);
926 h_DeleteHostFromAddrHashTable_r(host->z.host, host->z.port, host);
927 /* delete the hash entry for each valid alternate addresses */
928 for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
929 hostAddrPort = host->z.interface->interface[i];
931 * if the interface addr/port is the primary, we already
932 * removed it. If the addr/port is not valid, its not
935 if (hostAddrPort.valid &&
936 (host->z.host != hostAddrPort.addr ||
937 host->z.port != hostAddrPort.port))
938 h_DeleteHostFromAddrHashTable_r(hostAddrPort.addr, hostAddrPort.port, host);
940 free(host->z.interface);
941 host->z.interface = NULL;
942 } /* if alternate address exists */
944 h_DeleteList_r(host); /* remove host from global host List */
951 /* h_Enumerate: Calls (*proc)(host, param) for at least each host in the
952 * system at the start of the enumeration (perhaps more). Hosts may be deleted
953 * (have delete flag set); ditto for clients. refCount is always incremented
954 * before (*proc) is called.
956 * The return value of the proc is a set of flags. The proc should set
957 * H_ENUMERATE_BAIL(foo) if the enumeration of hosts should be stopped early.
960 h_Enumerate(int (*proc) (struct host*, void *), void *param)
962 struct host *host, **list;
967 if (hostCount == 0) {
971 list = malloc(hostCount * sizeof(struct host *));
973 ViceLogThenPanic(0, ("Failed malloc in h_Enumerate (list)\n"));
975 for (totalCount = count = 0, host = hostList;
976 host && totalCount < hostCount;
977 host = host->z.next, totalCount++) {
979 if (!(host->z.hostFlags & HOSTDELETED)) {
985 if (totalCount != hostCount) {
986 ViceLog(0, ("h_Enumerate found %d of %d hosts\n", totalCount, hostCount));
987 } else if (host != NULL) {
988 ViceLog(0, ("h_Enumerate found more than %d hosts\n", hostCount));
989 ShutDownAndCore(PANIC);
992 for (i = 0; i < count; i++) {
994 flags = (*proc) (list[i], param);
996 h_Release_r(list[i]);
998 /* bail out of the enumeration early */
999 if (H_ENUMERATE_ISSET_BAIL(flags)) {
1002 ViceLog(0, ("h_Enumerate got back invalid return value %d\n", flags));
1003 ShutDownAndCore(PANIC);
1007 /* we bailed out of enumerating hosts early; we still have holds on
1008 * some of the hosts in 'list', so release them */
1011 for ( ; i < count; i++) {
1012 h_Release_r(list[i]);
1020 /* h_Enumerate_r (revised):
1021 * Calls (*proc)(host, param) for each host in hostList, starting
1022 * at enumstart. Called only under H_LOCK. Hosts may be deleted (have
1023 * delete flag set); ditto for clients. refCount is always incremented
1024 * before (*proc) is called.
1026 * @note Assumes that hostList is only prepended to, that a host is never
1027 * inserted into the middle. Otherwise this would not be guaranteed to
1030 * The return value of the proc is a set of flags. The proc should set
1031 * H_ENUMERATE_BAIL(foo) if the enumeration of hosts should be stopped early.
1034 h_Enumerate_r(int (*proc) (struct host *, void *),
1035 struct host *enumstart, void *param)
1037 struct host *host, *next;
1041 if (hostCount == 0) {
1048 /* find the first non-deleted host, so we know where to actually start
1050 for (count = 0; host && count < hostCount; count++) {
1051 if (!(host->z.hostFlags & HOSTDELETED)) {
1055 host = host->z.next;
1058 /* we didn't find a non-deleted host... */
1060 if (host && count >= hostCount) {
1061 /* ...because we found a loop */
1062 ViceLog(0, ("h_Enumerate_r found more than %d hosts\n", hostCount));
1063 ShutDownAndCore(PANIC);
1066 /* ...because the hostList is full of deleted hosts */
1070 h_Hold_r(enumstart);
1072 /* remember hostCount, lest it change over the potential H_LOCK drop in
1074 origHostCount = hostCount;
1076 for (count = 0, host = enumstart; host && count < origHostCount; host = next, count++) {
1077 next = host->z.next;
1079 /* find the next non-deleted host */
1080 while (next && (next->z.hostFlags & HOSTDELETED)) {
1081 next = next->z.next;
1082 /* inc count for the skipped-over host */
1083 if (++count > origHostCount) {
1084 ViceLog(0, ("h_Enumerate_r found more than %d hosts\n", origHostCount));
1085 ShutDownAndCore(PANIC);
1091 if (!(host->z.hostFlags & HOSTDELETED)) {
1093 flags = (*proc) (host, param);
1094 if (H_ENUMERATE_ISSET_BAIL(flags)) {
1095 h_Release_r(host); /* this might free up the host */
1101 ViceLog(0, ("h_Enumerate_r got back invalid return value %d\n", flags));
1102 ShutDownAndCore(PANIC);
1105 h_Release_r(host); /* this might free up the host */
1107 if (host != NULL && count >= origHostCount) {
1108 ViceLog(0, ("h_Enumerate_r found more than %d hosts\n", origHostCount));
1109 ShutDownAndCore(PANIC);
1111 } /*h_Enumerate_r */
1114 /* inserts a new HashChain structure corresponding to this UUID */
1116 h_AddHostToUuidHashTable_r(struct afsUUID *uuid, struct host *host)
1119 struct h_UuidHashChain *chain;
1120 char uuid1[128], uuid2[128];
1123 /* hash into proper bucket */
1124 index = h_UuidHashIndex(uuid);
1126 /* don't add the same entry multiple times */
1127 for (chain = hostUuidHashTable[index]; chain; chain = chain->next) {
1128 if (!chain->hostPtr)
1131 if (chain->hostPtr->z.interface &&
1132 afs_uuid_equal(&chain->hostPtr->z.interface->uuid, uuid)) {
1133 if (GetLogLevel() >= 125) {
1134 afsUUID_to_string(&chain->hostPtr->z.interface->uuid, uuid1,
1136 afsUUID_to_string(uuid, uuid2, 127);
1137 ViceLog(125, ("h_AddHostToUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s) exists as %s:%d (uuid %s)\n",
1139 afs_inet_ntoa_r(chain->hostPtr->z.host, hoststr),
1140 ntohs(chain->hostPtr->z.port), uuid2));
1146 /* insert into beginning of list for this bucket */
1147 chain = malloc(sizeof(struct h_UuidHashChain));
1149 ViceLogThenPanic(0, ("Failed malloc in h_AddHostToUuidHashTable_r\n"));
1151 chain->hostPtr = host;
1152 chain->next = hostUuidHashTable[index];
1153 hostUuidHashTable[index] = chain;
1154 if (GetLogLevel() < 125)
1156 afsUUID_to_string(uuid, uuid2, 127);
1158 ("h_AddHostToUuidHashTable_r: host %p (%s:%d) added as uuid %s\n",
1159 host, afs_inet_ntoa_r(chain->hostPtr->z.host, hoststr),
1160 ntohs(chain->hostPtr->z.port), uuid2));
1163 /* deletes a HashChain structure corresponding to this host */
1165 h_DeleteHostFromUuidHashTable_r(struct host *host)
1168 struct h_UuidHashChain **uhp, *uth;
1172 if (!host->z.interface)
1175 /* hash into proper bucket */
1176 index = h_UuidHashIndex(&host->z.interface->uuid);
1178 if (GetLogLevel() >= 125)
1179 afsUUID_to_string(&host->z.interface->uuid, uuid1, 127);
1180 for (uhp = &hostUuidHashTable[index]; (uth = *uhp); uhp = &uth->next) {
1181 opr_Assert(uth->hostPtr);
1182 if (uth->hostPtr == host) {
1184 ("h_DeleteHostFromUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s %s:%d)\n",
1185 host, uuid1, afs_inet_ntoa_r(host->z.host, hoststr),
1186 ntohs(host->z.port)));
1193 ("h_DeleteHostFromUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s %s:%d) not found\n",
1194 host, uuid1, afs_inet_ntoa_r(host->z.host, hoststr),
1195 ntohs(host->z.port)));
1200 * This is called with host locked and held.
1202 * All addresses are in network byte order.
1205 invalidateInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
1209 struct Interface *interface;
1210 char hoststr[16], hoststr2[16];
1213 opr_Assert(host->z.interface);
1215 ViceLog(125, ("invalidateInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) addr %s:%d\n",
1216 host, afs_inet_ntoa_r(host->z.host, hoststr),
1217 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
1221 * Make sure this address is on the list of known addresses
1224 interface = host->z.interface;
1225 number = host->z.interface->numberOfInterfaces;
1226 for (i = 0; i < number; i++) {
1227 if (interface->interface[i].addr == addr &&
1228 interface->interface[i].port == port) {
1229 if (interface->interface[i].valid) {
1230 h_DeleteHostFromAddrHashTable_r(addr, port, host);
1231 interface->interface[i].valid = 0;
1242 * This is called with host locked and held. This function differs
1243 * from removeInterfaceAddr_r in that it is called when the address
1244 * is being removed from the host regardless of whether or not there
1245 * is an interface list for the host. This function will delete the
1246 * host if there are no addresses left on it.
1248 * All addresses are in network byte order.
1251 removeAddress_r(struct host *host, afs_uint32 addr, afs_uint16 port)
1254 char hoststr[16], hoststr2[16];
1255 struct rx_connection *rxconn;
1257 if (!host->z.interface || host->z.interface->numberOfInterfaces == 1) {
1258 if (host->z.host == addr && host->z.port == port) {
1260 ("Removing only address for host %" AFS_PTR_FMT " (%s:%d), deleting host.\n",
1261 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
1262 host->z.hostFlags |= HOSTDELETED;
1264 * Do not remove the primary addr/port from the hash table.
1265 * It will be ignored due to the HOSTDELETED flag and will
1266 * be removed when h_TossStuff_r() cleans up the HOSTDELETED
1267 * host. Removing it here will only result in a search for
1268 * the host/addr/port in the hash chain which will fail.
1272 ("Removing address that does not belong to host %" AFS_PTR_FMT " (%s:%d).\n",
1273 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
1276 if (host->z.host == addr && host->z.port == port) {
1277 removeInterfaceAddr_r(host, addr, port);
1279 for (i=0; i < host->z.interface->numberOfInterfaces; i++) {
1280 if (host->z.interface->interface[i].valid) {
1282 ("Removed address for host %" AFS_PTR_FMT " (%s:%d), new primary interface %s:%d.\n",
1283 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
1284 afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr2),
1285 ntohs(host->z.interface->interface[i].port)));
1286 host->z.host = host->z.interface->interface[i].addr;
1287 host->z.port = host->z.interface->interface[i].port;
1288 h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
1293 if (i == host->z.interface->numberOfInterfaces) {
1295 ("Removed only address for host %" AFS_PTR_FMT " (%s:%d), no valid alternate interfaces, deleting host.\n",
1296 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
1297 host->z.hostFlags |= HOSTDELETED;
1298 /* addr/port was removed from the hash table */
1302 rxconn = host->z.callback_rxcon;
1303 host->z.callback_rxcon = NULL;
1306 rx_DestroyConnection(rxconn);
1310 h_SetupCallbackConn_r(host);
1313 /* not the primary addr/port, just invalidate it */
1314 invalidateInterfaceAddr_r(host, addr, port);
1322 createHostAddrHashChain_r(int index, afs_uint32 addr, afs_uint16 port, struct host *host)
1324 struct h_AddrHashChain *chain;
1327 /* insert into beginning of list for this bucket */
1328 chain = malloc(sizeof(struct h_AddrHashChain));
1330 ViceLogThenPanic(0, ("Failed malloc in h_AddHostToAddrHashTable_r\n"));
1332 chain->hostPtr = host;
1333 chain->next = hostAddrHashTable[index];
1336 hostAddrHashTable[index] = chain;
1337 ViceLog(125, ("h_AddHostToAddrHashTable_r: host %" AFS_PTR_FMT " added as %s:%d\n",
1338 host, afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
1342 * Resolve host address conflicts when hashing by address.
1344 * @param[in] addr an ip address of the interface
1345 * @param[in] port the port of the interface
1346 * @param[in] newHost the host being added with this address
1347 * @param[in] oldHost the host previously added with this address
1350 reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
1351 struct host *oldHost)
1353 struct rx_connection *cb = NULL;
1355 struct interfaceAddr interf;
1357 afsUUID *newHostUuid = &nulluuid;
1358 afsUUID *oldHostUuid = &nulluuid;
1362 ("reconcileHosts_r: addr %s:%d newHost %" AFS_PTR_FMT " oldHost %"
1363 AFS_PTR_FMT "\n", afs_inet_ntoa_r(addr, hoststr), ntohs(port),
1366 opr_Assert(oldHost != newHost);
1367 caps.Capabilities_val = NULL;
1370 sc = rxnull_NewClientSecurityObject();
1373 cb = rx_NewConnection(addr, port, 1, sc, 0);
1374 rx_SetConnDeadTime(cb, 50);
1375 rx_SetConnHardDeadTime(cb, AFS_HARDDEADTIME);
1380 code = RXAFSCB_TellMeAboutYourself(cb, &interf, &caps);
1381 if (code == RXGEN_OPCODE) {
1382 code = RXAFSCB_WhoAreYou(cb, &interf);
1386 if (code == RXGEN_OPCODE ||
1387 (code == 0 && afs_uuid_equal(&interf.uuid, &nulluuid))) {
1389 ("reconcileHosts_r: WhoAreYou not supported for connection (%s:%d), error %d\n",
1390 afs_inet_ntoa_r(addr, hoststr), ntohs(port), code));
1395 ("reconcileHosts_r: WhoAreYou failed for connection (%s:%d), error %d\n",
1396 afs_inet_ntoa_r(addr, hoststr), ntohs(port), code));
1400 /* Since lock was dropped, the hosts may have been deleted during the rpcs. */
1401 if ((newHost->z.hostFlags & HOSTDELETED)
1402 && (oldHost->z.hostFlags & HOSTDELETED)) {
1404 ("reconcileHosts_r: new and old hosts were deleted during probe.\n"));
1408 /* A check can be done if at least one of the hosts has a uuid. It
1409 * is an error if the hosts have the same (not null) uuid. */
1410 if ((!(newHost->z.hostFlags & HOSTDELETED)) && newHost->z.interface) {
1411 newHostUuid = &(newHost->z.interface->uuid);
1413 if ((!(oldHost->z.hostFlags & HOSTDELETED)) && oldHost->z.interface) {
1414 oldHostUuid = &(oldHost->z.interface->uuid);
1416 if (afs_uuid_equal(newHostUuid, &nulluuid) &&
1417 afs_uuid_equal(oldHostUuid, &nulluuid)) {
1419 ("reconcileHosts_r: Cannot reconcile hosts for connection (%s:%d), no uuids\n",
1420 afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
1423 if (afs_uuid_equal(newHostUuid, oldHostUuid)) {
1425 ("reconcileHosts_r: Cannot reconcile hosts for connection (%s:%d), same uuids\n",
1426 afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
1430 /* Determine which host should be hashed */
1431 if ((!(newHost->z.hostFlags & HOSTDELETED))
1432 && afs_uuid_equal(newHostUuid, &(interf.uuid))) {
1433 /* Install the new host into the hash before removing the stale
1434 * addresses. Walk the hash chain again since the hash table may have
1435 * been changed when the host lock was dropped to get the uuid. */
1436 struct h_AddrHashChain *chain;
1437 int index = h_HashIndex(addr);
1438 for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
1439 if (chain->addr == addr && chain->port == port) {
1440 chain->hostPtr = newHost;
1441 removeAddress_r(oldHost, addr, port);
1445 createHostAddrHashChain_r(index, addr, port, newHost);
1446 removeAddress_r(oldHost, addr, port);
1449 if ((!(oldHost->z.hostFlags & HOSTDELETED))
1450 && afs_uuid_equal(oldHostUuid, &(interf.uuid))) {
1451 removeAddress_r(newHost, addr, port);
1456 if (!(newHost->z.hostFlags & HOSTDELETED)) {
1457 removeAddress_r(newHost, addr, port);
1459 if (!(oldHost->z.hostFlags & HOSTDELETED)) {
1460 removeAddress_r(oldHost, addr, port);
1464 h_Release_r(newHost);
1465 h_Release_r(oldHost);
1466 rx_DestroyConnection(cb);
1470 /* inserts a new HashChain structure corresponding to this address */
1472 h_AddHostToAddrHashTable_r(afs_uint32 addr, afs_uint16 port, struct host *host)
1475 struct h_AddrHashChain *chain;
1478 /* hash into proper bucket */
1479 index = h_HashIndex(addr);
1481 /* don't add the same address:port pair entry multiple times */
1482 for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
1483 if (chain->addr == addr && chain->port == port) {
1484 if (chain->hostPtr == host) {
1486 ("h_AddHostToAddrHashTable_r: host %" AFS_PTR_FMT " (%s:%d) already hashed\n",
1487 host, afs_inet_ntoa_r(chain->addr, hoststr),
1488 ntohs(chain->port)));
1491 if (!(chain->hostPtr->z.hostFlags & HOSTDELETED)) {
1492 /* attempt to resolve host address collision */
1493 reconcileHosts_r(addr, port, host, chain->hostPtr);
1498 createHostAddrHashChain_r(index, addr, port, host);
1502 * This is called with host locked and held.
1503 * It is called to either validate or add an additional interface
1504 * address/port on the specified host.
1506 * All addresses are in network byte order.
1509 addInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
1513 struct Interface *interface;
1514 char hoststr[16], hoststr2[16];
1517 opr_Assert(host->z.interface);
1520 * Make sure this address is on the list of known addresses
1523 number = host->z.interface->numberOfInterfaces;
1524 for (i = 0; i < number; i++) {
1525 if (host->z.interface->interface[i].addr == addr &&
1526 host->z.interface->interface[i].port == port) {
1528 ("addInterfaceAddr : found host %" AFS_PTR_FMT " (%s:%d) adding %s:%d%s\n",
1529 host, afs_inet_ntoa_r(host->z.host, hoststr),
1530 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
1531 ntohs(port), host->z.interface->interface[i].valid ? "" :
1534 if (host->z.interface->interface[i].valid == 0) {
1535 host->z.interface->interface[i].valid = 1;
1536 h_AddHostToAddrHashTable_r(addr, port, host);
1542 ViceLog(125, ("addInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) adding %s:%d\n",
1543 host, afs_inet_ntoa_r(host->z.host, hoststr),
1544 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
1547 interface = malloc(sizeof(struct Interface)
1548 + (sizeof(struct AddrPort) * number));
1550 ViceLogThenPanic(0, ("Failed malloc in addInterfaceAddr_r\n"));
1552 interface->numberOfInterfaces = number + 1;
1553 interface->uuid = host->z.interface->uuid;
1554 for (i = 0; i < number; i++)
1555 interface->interface[i] = host->z.interface->interface[i];
1557 /* Add the new valid interface */
1558 interface->interface[number].addr = addr;
1559 interface->interface[number].port = port;
1560 interface->interface[number].valid = 1;
1561 h_AddHostToAddrHashTable_r(addr, port, host);
1562 free(host->z.interface);
1563 host->z.interface = interface;
1570 * This is called with host locked and held.
1572 * All addresses are in network byte order.
1575 removeInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
1579 struct Interface *interface;
1580 char hoststr[16], hoststr2[16];
1583 opr_Assert(host->z.interface);
1585 ViceLog(125, ("removeInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) addr %s:%d\n",
1586 host, afs_inet_ntoa_r(host->z.host, hoststr),
1587 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
1591 * Make sure this address is on the list of known addresses
1594 interface = host->z.interface;
1595 number = host->z.interface->numberOfInterfaces;
1596 for (i = 0; i < number; i++) {
1597 if (interface->interface[i].addr == addr &&
1598 interface->interface[i].port == port) {
1599 if (interface->interface[i].valid)
1600 h_DeleteHostFromAddrHashTable_r(addr, port, host);
1602 for (; i < number; i++) {
1603 interface->interface[i] = interface->interface[i+1];
1605 interface->numberOfInterfaces = number;
1614 * The following few functions deal with caching TellMeAboutYourself calls
1615 * that we issued to clients. Why do we do this? Well:
1617 * Q: First, why do we need to issue a TMAY against a client on an incoming new
1620 * A: We must verify that the incoming Rx connection is the same host that
1621 * we have a 'host' structure for. On new calls for existing connections, we
1622 * can remember which host corresponds to that connection, but for new
1623 * connections, we have no way to find what host it is for, except by looking
1624 * up the host by IP address. Since hosts can change IP addresses, we need to
1625 * contact the IP address to see if it's the host we think it is.
1627 * Q: Okay, then why cache the results?
1629 * A: The TMAY calls to a single host are serialized, because they are issued
1630 * with the host's host->lock held. If we get 4 Rx calls each on new
1631 * connections to the same host at the same time, the 1st call will lock the
1632 * host, and issue a TMAY. Once that's done, the second call will issue a
1633 * TMAY, then the 3rd and then the 4th. However, the 3rd and 4th calls have
1634 * been waiting to issue a TMAY since before the 2nd call even _started_ to
1635 * issue a TMAY. So, we can just effectively give the results of the 2nd
1636 * call's TMAY to the 3rd and 4th, too. Since it is nondeterministic which of
1637 * those calls gets to issue a TMAY "first", we can just assume they all got
1640 * Note that in the above example, we cannot reuse the results of the 1st TMAY
1641 * for the 2nd, 3rd, and 4th calls (we only reuse the results of the 2nd).
1642 * This is because by the time the 2nd call starts waiting for the host lock,
1643 * it doesn't know how long the 1st TMAY has been running, so the 2nd call
1644 * might indeed get a different TMAY result (though this probably would be
1647 * Anyway, so, if we don't cache the results, we are issuing TMAYs that are
1648 * pure overhead. In an environment with clients that create a lot of
1649 * connections to a fileserver (keep in mind each new PAG on OpenAFS clients
1650 * creates a new connection), this can mean a significant amount of overhead.
1651 * So, we use this "TMAY cache" to avoid this overhead for the common case.
1655 * Should we skip calling TellMeAboutYourself on this host, and instead rely
1656 * on cached TMAY results?
1658 * @param[in] host The host we are dealing with
1659 * @param[in] prewait_tmays What the value of host->z.n_tmays was _before_ we
1661 * @param[in] prewait_host What the primary IP address for 'host' was before
1663 * @param[in] prewait_port What the primary port was for 'host' before we
1666 * @return Whether we should skip calling TMAY, and instead rely on cached
1670 ShouldSkipTMAY(struct host *host, int prewait_tmays, afs_uint32 prewait_host,
1671 afs_uint16 prewait_port)
1674 if (host->z.n_tmays > prewait_tmays + 1) {
1675 /* while we were waiting for the host lock, the in-progress TMAY
1676 * call finished, someone else started a new TMAY call, and that
1677 * finished. so, calling TMAY again won't give us any information
1678 * or additional guarantees. */
1681 if (host->z.host != prewait_host || host->z.port != prewait_port) {
1682 /* ...but don't skip it if the host has changed */
1689 * If appropriate, simulate a TellMeAboutYourself call on 'host' by extracting
1690 * cached interfaceAddr and Capabilities information from 'host' itself.
1692 * @param[in] host The host we're dealing with
1693 * @param[inout] askiptmay On entering this function, this should contain the
1694 * result of ShouldSkipTMAY. On return, it is 1 if we
1695 * actually did use cached TMAY results, or 0 if we
1697 * @param[out] interf The interfaceAddr result of the simulated TMAY call
1698 * @param[out] caps The Capabilities result of the simulated TMAY call
1701 * @retval 0 We used the cached TMAY results; do NOT make a real TMAY request
1702 * @retval otherwise We did not use cached TMAY results; issue a real TMAY request
1705 SimulateTMAY(struct host *host, int *askiptmay, struct interfaceAddr *interf,
1711 /* we're not supposed to skip the actual TMAY call */
1715 *interf = host->z.tmay_interf;
1717 free(caps->Capabilities_val);
1718 caps->Capabilities_val = NULL;
1719 caps->Capabilities_len = 0;
1721 if (!host->z.tmay_caps.Capabilities_val) {
1725 capsize = sizeof(caps->Capabilities_val[0]) * host->z.tmay_caps.Capabilities_len;
1727 caps->Capabilities_val = malloc(capsize);
1728 if (!caps->Capabilities_val) {
1729 /* we should/did _not_ skip the real TMAY call, since we couldn't
1730 * alloc memory to use the cached results */
1734 caps->Capabilities_len = host->z.tmay_caps.Capabilities_len;
1735 memcpy(caps->Capabilities_val, host->z.tmay_caps.Capabilities_val, capsize);
1741 * If appropriate, store the given results from a real TellmeAboutYourself
1742 * call, and cache them in the given host structure.
1744 * @param[in] host The host we're dealing with
1745 * @param[in] skiptmay 1 if we skipped making a real TMAY call, 0 otherwise
1746 * @param[in] didtmay 1 if we issued a successful real TMAY call, 0 otherwise
1747 * @param[in] interf The interfaceAddr result from the real TMAY call
1748 * @param[in] caps The Capabilities result from the real TMAY call
1751 CacheTMAY(struct host *host, int skiptmay, int didtmay,
1752 struct interfaceAddr *interf, Capabilities *caps)
1757 /* we simulated the TMAY call, so the state of the world hasn't
1758 * changed; don't touch anything */
1762 /* we did not perform a successful TMAY, so we don't have valid
1763 * results to cache. blow away the existing cache so we don't use
1767 if (host->z.n_tmays == INT_MAX) {
1768 /* make sure int rollover doesn't screw up our ordering */
1771 if (host->lock.num_waiting == 0) {
1772 /* nobody is waiting for this host, so no reason to cache anything */
1776 /* okay, if we got here, everything looks good; let's cache the given
1777 * 'interf' and 'caps' */
1779 host->z.tmay_interf = *interf;
1781 if (!caps->Capabilities_val) {
1782 free(host->z.tmay_caps.Capabilities_val);
1783 host->z.tmay_caps.Capabilities_val = NULL;
1784 host->z.tmay_caps.Capabilities_len = 0;
1787 if (caps->Capabilities_len != host->z.tmay_caps.Capabilities_len) {
1788 free(host->z.tmay_caps.Capabilities_val);
1789 host->z.tmay_caps.Capabilities_val = NULL;
1790 host->z.tmay_caps.Capabilities_len = 0;
1793 capsize = sizeof(caps->Capabilities_val[0]) * caps->Capabilities_len;
1795 if (!host->z.tmay_caps.Capabilities_val) {
1796 host->z.tmay_caps.Capabilities_val = malloc(capsize);
1797 if (!host->z.tmay_caps.Capabilities_val) {
1802 host->z.tmay_caps.Capabilities_len = caps->Capabilities_len;
1803 memcpy(host->z.tmay_caps.Capabilities_val, caps->Capabilities_val, capsize);
1809 /* blow away the cached TMAY data; pretend we never saw anything */
1810 free(host->z.tmay_caps.Capabilities_val);
1811 host->z.tmay_caps.Capabilities_val = NULL;
1812 host->z.tmay_caps.Capabilities_len = 0;
1813 memset(&host->z.tmay_interf, 0, sizeof(host->z.tmay_interf));
1815 host->z.n_tmays = 0;
1819 h_threadquota(int waiting)
1821 if (waiting > h_quota_limit) {
1827 /* If found, host is returned with refCount incremented */
1829 h_GetHost_r(struct rx_connection *tcon)
1832 struct host *oldHost;
1834 struct interfaceAddr interf;
1835 int interfValid = 0;
1836 struct Identity *identP = NULL;
1839 char hoststr[16], hoststr2[16];
1841 struct rx_connection *cb_conn = NULL;
1842 struct rx_connection *cb_in = NULL;
1844 caps.Capabilities_val = NULL;
1846 haddr = rxr_HostOf(tcon);
1847 hport = rxr_PortOf(tcon);
1850 rx_DestroyConnection(cb_in);
1853 if (caps.Capabilities_val)
1854 free(caps.Capabilities_val);
1855 caps.Capabilities_val = NULL;
1856 caps.Capabilities_len = 0;
1859 if (h_Lookup_r(haddr, hport, &host))
1861 identP = (struct Identity *)rx_GetSpecific(tcon, rxcon_ident_key);
1862 if (host && !identP && !(host->z.Console & 1)) {
1863 /* This is a new connection, and we already have a host
1864 * structure for this address. Verify that the identity
1865 * of the caller matches the identity in the host structure.
1868 int didtmay = 0; /* did we make a successful TMAY call against host->z.host? */
1869 unsigned int prewait_tmays;
1870 afs_uint32 prewait_host;
1871 afs_uint16 prewait_port;
1874 if ((host->z.hostFlags & HWHO_INPROGRESS) &&
1875 h_threadquota(host->lock.num_waiting)) {
1881 prewait_tmays = host->z.n_tmays;
1882 prewait_host = host->z.host;
1883 prewait_port = host->z.port;
1886 if (!(host->z.hostFlags & ALTADDR) ||
1887 (host->z.hostFlags & HOSTDELETED)) {
1888 /* Another thread is doing initialization
1889 * or this host was deleted while we
1890 * waited for the lock. */
1893 ("Host %" AFS_PTR_FMT " (%s:%d) starting h_Lookup again\n",
1894 host, afs_inet_ntoa_r(host->z.host, hoststr),
1895 ntohs(host->z.port)));
1899 host->z.hostFlags |= HWHO_INPROGRESS;
1900 host->z.hostFlags &= ~ALTADDR;
1902 /* We received a new connection from an IP address/port
1903 * that is associated with 'host' but the address/port of
1904 * the callback connection does not have to match it.
1905 * If there is a match, we can use the existing callback
1906 * connection to verify the UUID. If they do not match
1907 * we need to use a new callback connection to verify the
1908 * UUID of the incoming caller and perhaps use the old
1909 * callback connection to verify that the old address/port
1913 cb_conn = host->z.callback_rxcon;
1914 rx_GetConnection(cb_conn);
1916 skiptmay = ShouldSkipTMAY(host, prewait_tmays, prewait_host, prewait_port);
1919 if (haddr == host->z.host && hport == host->z.port) {
1920 /* The existing callback connection matches the
1921 * incoming connection so just use it.
1924 if (SimulateTMAY(host, &skiptmay, &interf, &caps) == 0) {
1925 /* noop; we don't need to call TellMeAboutYourself; we can
1926 * trust the results from the last TMAY call */
1931 RXAFSCB_TellMeAboutYourself(cb_conn, &interf, &caps);
1932 if (code == RXGEN_OPCODE)
1933 code = RXAFSCB_WhoAreYou(cb_conn, &interf);
1939 /* We do not have a match. Create a new connection
1940 * for the new addr/port and use multi_Rx to probe
1941 * both of them simultaneously.
1944 sc = rxnull_NewClientSecurityObject();
1945 cb_in = rx_NewConnection(haddr, hport, 1, sc, 0);
1946 rx_SetConnDeadTime(cb_in, 50);
1947 rx_SetConnHardDeadTime(cb_in, AFS_HARDDEADTIME);
1950 RXAFSCB_TellMeAboutYourself(cb_in, &interf, &caps);
1951 if (code == RXGEN_OPCODE)
1952 code = RXAFSCB_WhoAreYou(cb_in, &interf);
1954 rx_PutConnection(cb_conn);
1958 CacheTMAY(host, skiptmay, didtmay, &interf, &caps);
1960 if ((code == RXGEN_OPCODE) ||
1961 ((code == 0) && (afs_uuid_equal(&interf.uuid, &nulluuid)))) {
1962 identP = malloc(sizeof(struct Identity));
1964 ViceLogThenPanic(0, ("Failed malloc in h_GetHost_r\n"));
1967 rx_SetSpecific(tcon, rxcon_ident_key, identP);
1968 if (cb_in == NULL) {
1969 /* The host on this connection was unable to respond to
1970 * the WhoAreYou. We will treat this as a new connection
1971 * from the existing host. The worst that can happen is
1972 * that we maintain some extra callback state information */
1973 if (host->z.interface) {
1975 ("Host %" AFS_PTR_FMT " (%s:%d) used to support WhoAreYou, deleting.\n",
1977 afs_inet_ntoa_r(host->z.host, hoststr),
1978 ntohs(host->z.port)));
1979 host->z.hostFlags |= HOSTDELETED;
1980 host->z.hostFlags &= ~HWHO_INPROGRESS;
1987 /* The incoming connection does not support WhoAreYou but
1988 * the original one might have. Use removeAddress_r() to
1989 * remove this addr/port from the host that was found.
1990 * If there are no more addresses left for the host it
1991 * will be deleted. Then we retry.
1993 removeAddress_r(host, haddr, hport);
1994 host->z.hostFlags &= ~HWHO_INPROGRESS;
1995 host->z.hostFlags |= ALTADDR;
2001 } else if (code == 0) {
2003 identP = malloc(sizeof(struct Identity));
2005 ViceLogThenPanic(0, ("Failed malloc in h_GetHost_r\n"));
2008 identP->uuid = interf.uuid;
2009 rx_SetSpecific(tcon, rxcon_ident_key, identP);
2010 /* Check whether the UUID on this connection matches
2011 * the UUID in the host structure. If they don't match
2012 * then this is not the same host as before. */
2013 if (!host->z.interface
2014 || !afs_uuid_equal(&interf.uuid, &host->z.interface->uuid)) {
2017 ("Uuid doesn't match connection (%s:%d).\n",
2018 afs_inet_ntoa_r(haddr, hoststr), ntohs(hport)));
2019 removeAddress_r(host, haddr, hport);
2022 ("Uuid doesn't match host %" AFS_PTR_FMT " (%s:%d).\n",
2023 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
2025 removeAddress_r(host, host->z.host, host->z.port);
2027 host->z.hostFlags &= ~HWHO_INPROGRESS;
2028 host->z.hostFlags |= ALTADDR;
2034 /* the UUID matched the client at the incoming addr/port
2035 * but this is not the address of the active callback
2036 * connection. Try that connection and see if the client
2037 * is still there and if the reported UUID is the same.
2040 afsUUID uuid = host->z.interface->uuid;
2041 cb_conn = host->z.callback_rxcon;
2042 rx_GetConnection(cb_conn);
2043 rx_SetConnDeadTime(cb_conn, 2);
2044 rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
2046 code2 = RXAFSCB_ProbeUuid(cb_conn, &uuid);
2048 rx_SetConnDeadTime(cb_conn, 50);
2049 rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
2050 rx_PutConnection(cb_conn);
2053 /* The primary address is either not responding or
2054 * is not the client we are looking for. Need to
2055 * remove the primary address and add swap in the new
2056 * callback connection, and destroy the old one.
2058 struct rx_connection *rxconn;
2059 ViceLog(0,("CB: ProbeUuid for host %" AFS_PTR_FMT " (%s:%d) failed %d\n",
2061 afs_inet_ntoa_r(host->z.host, hoststr),
2062 ntohs(host->z.port),code2));
2065 * make sure we add and then remove. otherwise, we
2066 * might end up with no valid interfaces after the
2067 * remove and the host will have been marked deleted.
2069 addInterfaceAddr_r(host, haddr, hport);
2070 removeInterfaceAddr_r(host, host->z.host, host->z.port);
2071 host->z.host = haddr;
2072 host->z.port = hport;
2073 rxconn = host->z.callback_rxcon;
2074 host->z.callback_rxcon = cb_in;
2079 * If rx_DestroyConnection calls h_FreeConnection we
2080 * will deadlock on the host_glock_mutex. Work around
2081 * the problem by unhooking the client from the
2082 * connection before destroying the connection.
2084 rx_SetSpecific(rxconn, rxcon_client_key, (void *)0);
2085 rx_DestroyConnection(rxconn);
2091 /* A callback to the incoming connection address is failing.
2092 * Assume that the addr/port is no longer associated with the host
2093 * returned by h_Lookup_r.
2096 ("CB: WhoAreYou failed for connection (%s:%d) , error %d\n",
2097 afs_inet_ntoa_r(haddr, hoststr), ntohs(hport), code));
2098 removeAddress_r(host, haddr, hport);
2099 host->z.hostFlags &= ~HWHO_INPROGRESS;
2100 host->z.hostFlags |= ALTADDR;
2104 rx_DestroyConnection(cb_in);
2109 ("CB: WhoAreYou failed for host %" AFS_PTR_FMT " (%s:%d), error %d\n",
2110 host, afs_inet_ntoa_r(host->z.host, hoststr),
2111 ntohs(host->z.port), code));
2112 host->z.hostFlags |= VENUSDOWN;
2115 if (caps.Capabilities_val
2116 && (caps.Capabilities_val[0] & CLIENT_CAPABILITY_ERRORTRANS))
2117 host->z.hostFlags |= HERRORTRANS;
2119 host->z.hostFlags &= ~(HERRORTRANS);
2120 host->z.hostFlags |= ALTADDR;
2121 host->z.hostFlags &= ~HWHO_INPROGRESS;
2124 if (!(host->z.hostFlags & ALTADDR)) {
2125 /* another thread is doing the initialisation */
2127 ("Host %" AFS_PTR_FMT " (%s:%d) waiting for host-init to complete\n",
2128 host, afs_inet_ntoa_r(host->z.host, hoststr),
2129 ntohs(host->z.port)));
2133 ("Host %" AFS_PTR_FMT " (%s:%d) starting h_Lookup again\n",
2134 host, afs_inet_ntoa_r(host->z.host, hoststr),
2135 ntohs(host->z.port)));
2139 /* We need to check whether the identity in the host structure
2140 * matches the identity on the connection. If they don't match
2141 * then treat this a new host. */
2142 if (!(host->z.Console & 1)
2143 && ((!identP->valid && host->z.interface)
2144 || (identP->valid && !host->z.interface)
2146 && !afs_uuid_equal(&identP->uuid,
2147 &host->z.interface->uuid)))) {
2148 char uuid1[128], uuid2[128];
2150 afsUUID_to_string(&identP->uuid, uuid1, 127);
2151 if (host->z.interface)
2152 afsUUID_to_string(&host->z.interface->uuid, uuid2, 127);
2154 ("CB: new identity for host %p (%s:%d), "
2155 "deleting(%x %p %s %s)\n",
2156 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
2157 identP->valid, host->z.interface,
2158 identP->valid ? uuid1 : "no_uuid",
2159 host->z.interface ? uuid2 : "no_uuid"));
2161 /* The host in the cache is not the host for this connection */
2163 host->z.hostFlags |= HOSTDELETED;
2169 host = h_Alloc_r(tcon); /* returned held and locked */
2172 h_gethostcps_r(host, time(NULL));
2173 if (!(host->z.Console & 1)) {
2175 cb_conn = host->z.callback_rxcon;
2176 rx_GetConnection(cb_conn);
2177 host->z.hostFlags |= HWHO_INPROGRESS;
2180 RXAFSCB_TellMeAboutYourself(cb_conn, &interf, &caps);
2181 if (code == RXGEN_OPCODE)
2182 code = RXAFSCB_WhoAreYou(cb_conn, &interf);
2183 rx_PutConnection(cb_conn);
2186 if ((code == RXGEN_OPCODE) ||
2187 ((code == 0) && (afs_uuid_equal(&interf.uuid, &nulluuid)))) {
2189 identP = malloc(sizeof(struct Identity));
2194 ViceLogThenPanic(0, ("Failed malloc in h_GetHost_r\n"));
2198 rx_SetSpecific(tcon, rxcon_ident_key, identP);
2200 ("Host %" AFS_PTR_FMT " (%s:%d) does not support WhoAreYou.\n",
2201 host, afs_inet_ntoa_r(host->z.host, hoststr),
2202 ntohs(host->z.port)));
2204 } else if (code == 0) {
2206 identP = malloc(sizeof(struct Identity));
2211 ViceLogThenPanic(0, ("Failed malloc in h_GetHost_r\n"));
2215 identP->uuid = interf.uuid;
2217 rx_SetSpecific(tcon, rxcon_ident_key, identP);
2219 ("WhoAreYou success on host %" AFS_PTR_FMT " (%s:%d)\n",
2220 host, afs_inet_ntoa_r(host->z.host, hoststr),
2221 ntohs(host->z.port)));
2223 if (code == 0 && !identP->valid) {
2224 cb_conn = host->z.callback_rxcon;
2225 rx_GetConnection(cb_conn);
2227 code = RXAFSCB_InitCallBackState(cb_conn);
2228 rx_PutConnection(cb_conn);
2231 } else if (code == 0) {
2232 oldHost = h_LookupUuid_r(&identP->uuid);
2237 if (oldHost->z.hostFlags & HOSTDELETED) {
2238 h_Unlock_r(oldHost);
2239 h_Release_r(oldHost);
2247 /* This is a new address for an existing host. Update
2248 * the list of interfaces for the existing host and
2249 * delete the host structure we just allocated. */
2251 /* mark the duplicate host as deleted before we do
2252 * anything. The probing code below may try to change
2253 * "oldHost" to the same IP address as "host" currently
2254 * has, and we do not want a pseudo-"collision" to be
2256 host->z.hostFlags |= HOSTDELETED;
2258 oldHost->z.hostFlags |= HWHO_INPROGRESS;
2260 if (oldHost->z.interface) {
2262 afsUUID uuid = oldHost->z.interface->uuid;
2263 cb_conn = oldHost->z.callback_rxcon;
2264 rx_GetConnection(cb_conn);
2265 rx_SetConnDeadTime(cb_conn, 2);
2266 rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
2268 code2 = RXAFSCB_ProbeUuid(cb_conn, &uuid);
2270 rx_SetConnDeadTime(cb_conn, 50);
2271 rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
2272 rx_PutConnection(cb_conn);
2275 /* The primary address is either not responding or
2276 * is not the client we are looking for.
2277 * MultiProbeAlternateAddress_r() will remove the
2278 * alternate interfaces that do not have the same
2280 ViceLog(0,("CB: ProbeUuid for host %" AFS_PTR_FMT " (%s:%d) failed %d\n",
2282 afs_inet_ntoa_r(oldHost->z.host, hoststr),
2283 ntohs(oldHost->z.port),code2));
2285 if (MultiProbeAlternateAddress_r(oldHost)) {
2286 /* If MultiProbeAlternateAddress_r succeeded,
2287 * it updated oldHost->host and oldHost->port
2288 * to an address that responded successfully to
2289 * a ProbeUuid, so it is as if the ProbeUuid
2290 * call above returned success. So, only set
2291 * 'probefail' if MultiProbeAlternateAddress_r
2300 if (oldHost->z.host != haddr || oldHost->z.port != hport) {
2301 struct rx_connection *rxconn;
2304 ("CB: Host %" AFS_PTR_FMT " (%s:%d) has new addr %s:%d\n",
2306 afs_inet_ntoa_r(oldHost->z.host, hoststr2),
2307 ntohs(oldHost->z.port),
2308 afs_inet_ntoa_r(haddr, hoststr),
2311 * add then remove. otherwise the host may get marked
2312 * deleted if we removed the only valid address.
2314 addInterfaceAddr_r(oldHost, haddr, hport);
2315 if (probefail || oldHost->z.host == haddr) {
2317 * The probe failed which means that the old
2318 * address is either unreachable or is not the
2319 * same host we were just contacted by. We will
2320 * also remove addresses if only the port has
2321 * changed because that indicates the client
2324 removeInterfaceAddr_r(oldHost, oldHost->z.host, oldHost->z.port);
2327 struct Interface *interface = oldHost->z.interface;
2328 int number = oldHost->z.interface->numberOfInterfaces;
2329 for (i = 0; i < number; i++) {
2330 if (interface->interface[i].addr == haddr &&
2331 interface->interface[i].port != hport) {
2333 * We have just been contacted by a client
2334 * that has been seen from behind a NAT
2335 * and at least one other address.
2337 removeInterfaceAddr_r(oldHost, haddr,
2338 interface->interface[i].port);
2343 oldHost->z.host = haddr;
2344 oldHost->z.port = hport;
2345 rxconn = oldHost->z.callback_rxcon;
2346 oldHost->z.callback_rxcon = host->z.callback_rxcon;
2347 host->z.callback_rxcon = rxconn;
2349 /* don't destroy rxconn here; let h_TossStuff_r
2350 * take care of that via h_Release_r below */
2352 host->z.hostFlags &= ~HWHO_INPROGRESS;
2354 /* release host because it was allocated by h_Alloc_r */
2357 /* the new host is held and locked */
2359 /* This really is a new host */
2360 opr_Assert(interfValid == 1);
2361 initInterfaceAddr_r(host, &interf);
2363 cb_conn = host->z.callback_rxcon;
2364 rx_GetConnection(cb_conn);
2367 RXAFSCB_InitCallBackState3(cb_conn,
2369 rx_PutConnection(cb_conn);
2374 ("InitCallBackState3 success on host %" AFS_PTR_FMT " (%s:%d)\n",
2375 host, afs_inet_ntoa_r(host->z.host, hoststr),
2376 ntohs(host->z.port)));
2382 ("CB: RCallBackConnectBack failed for %" AFS_PTR_FMT " (%s:%d)\n",
2383 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
2384 host->z.hostFlags |= VENUSDOWN;
2387 ("CB: RCallBackConnectBack succeeded for %" AFS_PTR_FMT " (%s:%d)\n",
2388 host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
2389 host->z.hostFlags |= RESETDONE;
2392 if (caps.Capabilities_val
2393 && (caps.Capabilities_val[0] & CLIENT_CAPABILITY_ERRORTRANS))
2394 host->z.hostFlags |= HERRORTRANS;
2396 host->z.hostFlags &= ~(HERRORTRANS);
2397 host->z.hostFlags |= ALTADDR; /* host structure initialization complete */
2398 host->z.hostFlags &= ~HWHO_INPROGRESS;
2403 if (caps.Capabilities_val)
2404 free(caps.Capabilities_val);
2405 caps.Capabilities_val = NULL;
2406 caps.Capabilities_len = 0;
2408 rx_DestroyConnection(cb_in);
2418 h_InitHostPackage(int hquota)
2420 opr_Assert(hquota > 0);
2421 h_quota_limit = hquota;
2423 memset(&nulluuid, 0, sizeof(afsUUID));
2424 rxcon_ident_key = rx_KeyCreate((rx_destructor_t) free);
2425 rxcon_client_key = rx_KeyCreate((rx_destructor_t) 0);
2426 opr_mutex_init(&host_glock_mutex);
2430 MapName_r(char *uname, afs_int32 * aval)
2436 lnames.namelist_len = 1;
2437 lnames.namelist_val = (prname *) uname;
2438 lids.idlist_len = 0;
2439 lids.idlist_val = NULL;
2442 code = hpr_NameToId(&lnames, &lids);
2445 if (lids.idlist_val) {
2446 *aval = lids.idlist_val[0];
2447 if (*aval == AnonymousID) {
2449 ("MapName: NameToId on %s returns anonymousID\n",
2450 lnames.namelist_val[0]));
2452 free(lids.idlist_val); /* return parms are not malloced in stub if server proc aborts */
2455 ("MapName: NameToId on '%s' is unknown\n",
2456 lnames.namelist_val[0]));
2467 PerHost_EnumerateClient(struct host *host, void *arock)
2469 struct enumclient_args *args = arock;
2470 struct client *client;
2473 for (client = host->z.FirstClient; client; client = client->z.next) {
2474 if (!client->z.deleted && client->z.ViceId == args->vid) {
2476 client->z.refCount++;
2479 code = (*args->proc)(client, args->rock);
2482 h_ReleaseClient_r(client);
2485 return H_ENUMERATE_BAIL(0);
2494 h_EnumerateClients(VolumeId vid,
2495 int (*proc)(struct client *client, void *rock),
2498 struct enumclient_args args;
2504 h_Enumerate_r(PerHost_EnumerateClient, hostList, &args);
2509 format_vname(char *vname, int usize, const char *tname, const char *tinst,
2510 const char *tcell, afs_int32 islocal)
2514 len = strlcpy(vname, tname, usize);
2518 len = strlcat(vname, ".", usize);
2521 len = strlcat(vname, tinst, usize);
2525 if (tcell[0] && !islocal) {
2526 len = strlcat(vname, "@", usize);
2529 len = strlcat(vname, tcell, usize);
2537 getPeerDetails(struct rx_connection *conn,
2538 afs_int32 *viceid, afs_int32 *expTime, int authClass)
2541 #if (64-MAXKTCNAMELEN)
2542 ticket name length != 64
2546 char tcell[MAXKTCREALMLEN];
2547 char uname[PR_MAXNAMELEN];
2549 *viceid = AnonymousID;
2550 *expTime = 0x7fffffff;
2553 ("FindClient: authenticating connection: authClass=%d\n",
2555 if (authClass == RX_SECIDX_VAB) {
2556 /* A bcrypt tickets, no longer supported */
2557 ViceLog(1, ("FindClient: bcrypt ticket, using AnonymousID\n"));
2561 if (authClass == RX_SECIDX_KAD) {
2562 /* an rxkad ticket */
2566 /* kerberos ticket */
2567 code = rxkad_GetServerInfo(conn, /*level */ 0, (afs_uint32 *)expTime,
2568 tname, tinst, tcell, &kvno);
2570 ViceLog(1, ("Failed to get rxkad ticket info\n"));
2575 ("FindClient: rxkad conn: name=%s,inst=%s,cell=%s,exp=%d,kvno=%d\n",
2576 tname, tinst, tcell, *expTime, kvno));
2577 code = afsconf_IsLocalRealmMatch(confDir, &islocal, tname, tinst, tcell);
2580 ViceLog(0, ("FindClient: local realm check failed; code=%d", code));
2584 code = format_vname(uname, sizeof(uname), tname, tinst, tcell, islocal);
2586 ViceLog(0, ("FindClient: uname truncated."));
2590 /* translate the name to a vice id */
2591 code = MapName_r(uname, viceid);
2593 ViceLog(1, ("failed to map name=%s -> code=%d\n", uname,
2595 return code; /* Actually flag this is a failure */
2605 * Called by the server main loop. Returns a h_Held client, which must be
2606 * released later the main loop. Allocates a client if the matching one
2607 * isn't around. The client is returned with its reference count incremented
2608 * by one. The caller must call h_ReleaseClient_r when finished with
2611 * The refCount on client->z.host is returned incremented. h_ReleaseClient_r
2612 * does not decrement the refCount on client->z.host.
2614 * *a_viceid is set to the user's ViceId, even if we don't return a client
2618 h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
2620 struct client *client;
2621 struct host *host = NULL;
2622 struct client *oldClient;
2623 afs_int32 viceid = 0;
2631 client = (struct client *)rx_GetSpecific(tcon, rxcon_client_key);
2632 if (client && client->z.sid == rx_GetConnectionId(tcon)
2633 && client->z.VenusEpoch == rx_GetConnectionEpoch(tcon)
2634 && !(client->z.host->z.hostFlags & HOSTDELETED)
2635 && !client->z.deleted) {
2638 *a_viceid = client->z.ViceId;
2640 client->z.refCount++;
2641 h_Hold_r(client->z.host);
2642 if (client->z.prfail != 2) {
2643 /* Could add shared lock on client here */
2644 /* note that we don't have to lock entry in this path to
2645 * ensure CPS is initialized, since we don't call rx_SetSpecific
2646 * until initialization is done, and we only get here if
2647 * rx_GetSpecific located the client structure.
2652 ObtainWriteLock(&client->lock); /* released at end */
2658 authClass = rx_SecurityClassOf(tcon);
2660 code = getPeerDetails(tcon, &viceid, &expTime, authClass);
2668 if (!client) { /* loop */
2669 host = h_GetHost_r(tcon); /* Returns with incremented refCount */
2675 /* First try to find the client structure */
2676 for (client = host->z.FirstClient; client; client = client->z.next) {
2677 if (!client->z.deleted && (client->z.sid == rx_GetConnectionId(tcon))
2678 && (client->z.VenusEpoch == rx_GetConnectionEpoch(tcon))) {
2679 client->z.refCount++;
2681 ObtainWriteLock(&client->lock);
2687 /* Still no client structure - get one */
2690 if (host->z.hostFlags & HOSTDELETED) {
2695 /* Retry to find the client structure */
2696 for (client = host->z.FirstClient; client; client = client->z.next) {
2697 if (!client->z.deleted && (client->z.sid == rx_GetConnectionId(tcon))
2698 && (client->z.VenusEpoch == rx_GetConnectionEpoch(tcon))) {
2700 goto retryfirstclient;
2705 ObtainWriteLock(&client->lock);
2706 client->z.refCount = 1;
2707 client->z.host = host;
2708 client->z.InSameNetwork = host->z.InSameNetwork;
2709 client->z.ViceId = viceid;
2710 client->z.expTime = expTime; /* rx only */
2711 client->z.authClass = authClass; /* rx only */
2712 client->z.sid = rx_GetConnectionId(tcon);
2713 client->z.VenusEpoch = rx_GetConnectionEpoch(tcon);
2714 client->z.CPS.prlist_val = NULL;
2715 client->z.CPS.prlist_len = 0;
2719 client->z.prfail = fail;
2721 if (!(client->z.CPS.prlist_val) || (viceid != client->z.ViceId)) {
2722 client->z.CPS.prlist_len = 0;
2723 if (client->z.CPS.prlist_val && (client->z.ViceId != ANONYMOUSID))
2724 free(client->z.CPS.prlist_val);
2725 client->z.CPS.prlist_val = NULL;
2726 client->z.ViceId = viceid;
2727 client->z.expTime = expTime;
2729 if (viceid == ANONYMOUSID) {
2730 client->z.CPS.prlist_len = AnonCPS.prlist_len;
2731 client->z.CPS.prlist_val = AnonCPS.prlist_val;
2734 code = hpr_GetCPS(viceid, &client->z.CPS);
2739 ("pr_GetCPS failed(%d) for user %d, host %" AFS_PTR_FMT " (%s:%d)\n",
2740 code, viceid, client->z.host,
2741 afs_inet_ntoa_r(client->z.host->z.host,hoststr),
2742 ntohs(client->z.host->z.port)));
2744 /* Although ubik_Call (called by pr_GetCPS) traverses thru
2745 * all protection servers and reevaluates things if no
2746 * sync server or quorum is found we could still end up
2747 * with one of these errors. In such case we would like to
2748 * reevaluate the rpc call to find if there's cps for this
2749 * guy. We treat other errors (except network failures
2750 * ones - i.e. code < 0) as an indication that there is no
2751 * CPS for this host. Ideally we could like to deal this
2752 * problem the other way around (i.e. if code == NOCPS
2753 * ignore else retry next time) but the problem is that
2754 * there're other errors (i.e. EPERM) for which we don't
2755 * want to retry and we don't know the whole code list!
2757 if (code < 0 || code == UNOQUORUM || code == UNOTSYNC)
2758 client->z.prfail = 1;
2761 /* the disabling of system:administrators is so iffy and has so many
2762 * possible failure modes that we will disable it again */
2763 /* Turn off System:Administrator for safety
2764 * if (AL_IsAMember(SystemId, client->z.CPS) == 0)
2765 * osi_Assert(AL_DisableGroup(SystemId, client->z.CPS) == 0); */
2768 /* Now, tcon may already be set to a rock, since we blocked with no host
2769 * or client locks set above in pr_GetCPS (XXXX some locking is probably
2770 * required). So, before setting the RPC's rock, we should disconnect
2771 * the RPC from the other client structure's rock.
2773 oldClient = (struct client *)rx_GetSpecific(tcon, rxcon_client_key);
2774 if (oldClient && oldClient != client
2775 && oldClient->z.sid == rx_GetConnectionId(tcon)
2776 && oldClient->z.VenusEpoch == rx_GetConnectionEpoch(tcon)
2777 && !(oldClient->z.host->z.hostFlags & HOSTDELETED)) {
2779 if (!oldClient->z.deleted) {
2780 /* if we didn't create it, it's not ours to put back */
2782 ViceLog(0, ("FindClient: stillborn client %p(%x); "
2783 "conn %p (host %s:%d) had client %p(%x)\n",
2784 client, client->z.sid, tcon,
2785 afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
2786 ntohs(rxr_PortOf(tcon)),
2787 oldClient, oldClient->z.sid));
2788 if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
2789 free(client->z.CPS.prlist_val);
2790 client->z.CPS.prlist_val = NULL;
2791 client->z.CPS.prlist_len = 0;
2793 /* We should perhaps check for 0 here */
2794 client->z.refCount--;
2795 ReleaseWriteLock(&client->lock);
2800 oldClient->z.refCount++;
2802 h_Hold_r(oldClient->z.host);
2803 h_Release_r(client->z.host);
2806 ObtainWriteLock(&oldClient->lock);
2809 host = oldClient->z.host;
2811 ViceLog(0, ("FindClient: deleted client %p(%x ref %d host %p href "
2812 "%d) already had conn %p (host %s:%d, cid %x), stolen "
2813 "by client %p(%x, ref %d host %p href %d)\n",
2814 oldClient, oldClient->z.sid, oldClient->z.refCount,
2815 oldClient->z.host, oldClient->z.host->z.refCount, tcon,
2816 afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
2817 ntohs(rxr_PortOf(tcon)), rx_GetConnectionId(tcon),
2818 client, client->z.sid, client->z.refCount,
2819 client->z.host, client->z.host->z.refCount));
2820 /* rx_SetSpecific will be done immediately below */
2823 /* Avoid chaining in more than once. */
2827 if (host->z.hostFlags & HOSTDELETED) {
2832 client->z.host = NULL;
2834 if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
2835 free(client->z.CPS.prlist_val);
2836 client->z.CPS.prlist_val = NULL;
2837 client->z.CPS.prlist_len = 0;
2839 client->z.refCount--;
2840 ReleaseWriteLock(&client->lock);
2845 client->z.next = host->z.FirstClient;
2846 host->z.FirstClient = client;
2848 CurrentConnections++; /* increment number of connections */
2850 rx_SetSpecific(tcon, rxcon_client_key, client);
2851 ReleaseWriteLock(&client->lock);
2855 } /*h_FindClient_r */
2858 h_ReleaseClient_r(struct client *client)
2860 opr_Assert(client->z.refCount > 0);
2861 client->z.refCount--;
2867 * Sigh: this one is used to get the client AGAIN within the individual
2868 * server routines. This does not bother h_Holding the host, since
2869 * this is assumed already have been done by the server main loop.
2870 * It does check tokens, since only the server routines can return the
2871 * VICETOKENDEAD error code
2874 GetClient(struct rx_connection *tcon, struct client **cp)
2876 struct client *client;
2881 client = (struct client *)rx_GetSpecific(tcon, rxcon_client_key);
2882 if (client == NULL) {
2884 ("GetClient: no client in conn %p (host %s:%d), VBUSYING\n",
2885 tcon, afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
2886 ntohs(rxr_PortOf(tcon))));
2890 if (rx_GetConnectionId(tcon) != client->z.sid
2891 || rx_GetConnectionEpoch(tcon) != client->z.VenusEpoch) {
2893 ("GetClient: tcon %p tcon sid %d client sid %d\n",
2894 tcon, rx_GetConnectionId(tcon), client->z.sid));
2898 if (client && client->z.LastCall > client->z.expTime && client->z.expTime) {
2900 ("Token for %s at %s:%d expired %d\n", h_UserName(client),
2901 afs_inet_ntoa_r(client->z.host->z.host, hoststr),
2902 ntohs(client->z.host->z.port), client->z.expTime));
2904 return VICETOKENDEAD;
2906 if (client->z.deleted) {
2907 ViceLog(0, ("GetClient: got deleted client, connection will appear "
2908 "anonymous; tcon %p cid %x client %p ref %d host %p "
2909 "(%s:%d) href %d ViceId %d\n",
2910 tcon, rx_GetConnectionId(tcon), client, client->z.refCount,
2912 afs_inet_ntoa_r(client->z.host->z.host, hoststr),
2913 (int)ntohs(client->z.host->z.port), client->z.host->z.refCount,
2914 (int)client->z.ViceId));
2917 client->z.refCount++;
2924 PutClient(struct client **cp)
2930 h_ReleaseClient_r(*cp);
2937 /* Client user name for short term use. Note that this is NOT inexpensive */
2939 h_UserName(struct client *client)
2941 static char User[PR_MAXNAMELEN + 1];
2945 lids.idlist_len = 1;
2946 lids.idlist_val = malloc(1 * sizeof(afs_int32));
2947 if (!lids.idlist_val) {
2948 ViceLogThenPanic(0, ("Failed malloc in h_UserName\n"));
2950 lnames.namelist_len = 0;
2951 lnames.namelist_val = (prname *) 0;
2952 lids.idlist_val[0] = client->z.ViceId;
2953 if (hpr_IdToName(&lids, &lnames)) {
2954 /* We need to free id we alloced above! */
2955 free(lids.idlist_val);
2956 return "*UNKNOWN USER NAME*";
2958 strncpy(User, lnames.namelist_val[0], PR_MAXNAMELEN);
2959 free(lids.idlist_val);
2960 free(lnames.namelist_val);
2969 ("Total Client entries = %d, blocks = %d; Host entries = %d, blocks = %d\n",
2970 CEs, CEBlocks, HTs, HTBlocks));
2976 h_PrintClient(struct host *host, void *rock)
2978 StreamHandle_t *file = (StreamHandle_t *)rock;
2979 struct client *client;
2984 time_t LastCall, expTime;
2988 LastCall = host->z.LastCall;
2989 if (host->z.hostFlags & HOSTDELETED) {
2993 strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
2994 localtime_r(&LastCall, &tm));
2995 snprintf(tmpStr, sizeof tmpStr, "Host %s:%d down = %d, LastCall %s\n",
2996 afs_inet_ntoa_r(host->z.host, hoststr),
2997 ntohs(host->z.port), (host->z.hostFlags & VENUSDOWN),
2999 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3000 for (client = host->z.FirstClient; client; client = client->z.next) {
3001 if (!client->z.deleted) {
3002 expTime = client->z.expTime;
3003 strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
3004 localtime_r(&expTime, &tm));
3005 snprintf(tmpStr, sizeof tmpStr,
3006 " user id=%d, name=%s, sl=%s till %s\n",
3007 client->z.ViceId, h_UserName(client),
3008 client->z.authClass ? "Authenticated"
3009 : "Not authenticated",
3010 client->z.authClass ? tbuffer : "No Limit");
3011 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3012 snprintf(tmpStr, sizeof tmpStr, " CPS-%d is [",
3013 client->z.CPS.prlist_len);
3014 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3015 if (client->z.CPS.prlist_val) {
3016 for (i = 0; i < client->z.CPS.prlist_len; i++) {
3017 snprintf(tmpStr, sizeof tmpStr, " %d",
3018 client->z.CPS.prlist_val[i]);
3019 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3022 sprintf(tmpStr, "]\n");
3023 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3029 } /*h_PrintClient */
3034 * Print a list of clients, with last security level and token value seen,
3038 h_PrintClients(void)
3045 StreamHandle_t *file = STREAM_OPEN(AFSDIR_SERVER_CLNTDUMP_FILEPATH, "w");
3049 ("Couldn't create client dump file %s\n",
3050 AFSDIR_SERVER_CLNTDUMP_FILEPATH));
3054 strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
3055 localtime_r(&now, &tm));
3056 snprintf(tmpStr, sizeof tmpStr, "List of active users at %s\n\n",
3058 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3059 h_Enumerate(h_PrintClient, (char *)file);
3060 STREAM_REALLYCLOSE(file);
3061 ViceLog(0, ("Created client dump %s\n", AFSDIR_SERVER_CLNTDUMP_FILEPATH));
3068 h_DumpHost(struct host *host, void *rock)
3070 StreamHandle_t *file = (StreamHandle_t *)rock;
3077 snprintf(tmpStr, sizeof tmpStr,
3078 "ip:%s port:%d hidx:%d cbid:%d lock:%x last:%u active:%u "
3079 "down:%d del:%d cons:%d cldel:%d\n\t hpfailed:%d hcpsCall:%u "
3081 afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
3082 host->index, host->z.cblist, CheckLock(&host->lock),
3083 host->z.LastCall, host->z.ActiveCall, (host->z.hostFlags & VENUSDOWN),
3084 host->z.hostFlags & HOSTDELETED, host->z.Console,
3085 host->z.hostFlags & CLIENTDELETED, host->z.hcpsfailed,
3087 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3088 if (host->z.hcps.prlist_val)
3089 for (i = 0; i < host->z.hcps.prlist_len; i++) {
3090 snprintf(tmpStr, sizeof tmpStr, " %d", host->z.hcps.prlist_val[i]);
3091 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3093 sprintf(tmpStr, "] [");
3094 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3095 if (host->z.interface)
3096 for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
3098 sprintf(tmpStr, " %s:%d",
3099 afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr),
3100 ntohs(host->z.interface->interface[i].port));
3101 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3103 sprintf(tmpStr, "] refCount:%d hostFlags:%hu\n", host->z.refCount, host->z.hostFlags);
3104 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3116 StreamHandle_t *file = STREAM_OPEN(AFSDIR_SERVER_HOSTDUMP_FILEPATH, "w");
3123 ("Couldn't create host dump file %s\n",
3124 AFSDIR_SERVER_HOSTDUMP_FILEPATH));
3128 strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
3129 localtime_r(&now, &tm));
3130 snprintf(tmpStr, sizeof tmpStr, "List of active hosts at %s\n\n", tbuffer);
3131 (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
3132 h_Enumerate(h_DumpHost, (char *)file);
3133 STREAM_REALLYCLOSE(file);
3134 ViceLog(0, ("Created host dump %s\n", AFSDIR_SERVER_HOSTDUMP_FILEPATH));
3138 #ifdef AFS_DEMAND_ATTACH_FS
3141 * host state serialization
3143 static int h_stateFillHeader(struct host_state_header * hdr);
3144 static int h_stateCheckHeader(struct host_state_header * hdr);
3145 static int h_stateAllocMap(struct fs_dump_state * state);
3146 static int h_stateSaveHost(struct host * host, void *rock);
3147 static int h_stateRestoreHost(struct fs_dump_state * state);
3148 static int h_stateRestoreIndex(struct host * h, void *rock);
3149 static int h_stateVerifyHost(struct host * h, void *rock);
3150 static int h_stateVerifyAddrHash(struct fs_dump_state * state, struct host * h,
3151 afs_uint32 addr, afs_uint16 port, int valid);
3152 static int h_stateVerifyUuidHash(struct fs_dump_state * state, struct host * h);
3153 static void h_hostToDiskEntry_r(struct host * in, struct hostDiskEntry * out);
3154 static void h_diskEntryToHost_r(struct hostDiskEntry * in, struct host * out);
3157 * Is this host busy?
3159 * This is just a hint and should not be trusted; this should probably only be
3160 * used by the host state serialization code when trying to detect if a host
3161 * can be sanely serialized to disk or not. If this function returns 1, the
3162 * host may be in an invalid state and thus should not be saved to disk.
3165 h_isBusy_r(struct host *host)
3167 struct Lock *hostLock = &host->lock;
3170 LOCK_LOCK(hostLock);
3171 if (hostLock->excl_locked || hostLock->readers_reading) {
3174 LOCK_UNLOCK(hostLock);
3180 if (hostBusyFlags(host->z.hostFlags)) {
3187 /* this procedure saves all host state to disk for fast startup */
3189 h_stateSave(struct fs_dump_state * state)
3191 AssignInt64(state->eof_offset, &state->hdr->h_offset);
3194 ViceLog(0, ("h_stateSave: hostCount=%d\n", hostCount));
3196 /* invalidate host state header */
3197 memset(state->h_hdr, 0, sizeof(struct host_state_header));
3199 if (fs_stateWriteHeader(state, &state->hdr->h_offset, state->h_hdr,
3200 sizeof(struct host_state_header))) {
3205 fs_stateIncEOF(state, sizeof(struct host_state_header));
3207 h_Enumerate_r(h_stateSaveHost, hostList, (char *)state);
3212 h_stateFillHeader(state->h_hdr);
3214 /* write the real header to disk */
3215 state->bail = fs_stateWriteHeader(state, &state->hdr->h_offset, state->h_hdr,
3216 sizeof(struct host_state_header));
3223 * host state serialization
3225 * this procedure restores all host state from a disk for fast startup
3228 h_stateRestore(struct fs_dump_state * state)
3232 /* seek to the right position and read in the host state header */
3233 if (fs_stateReadHeader(state, &state->hdr->h_offset, state->h_hdr,
3234 sizeof(struct host_state_header))) {
3239 /* check the validity of the header */
3240 if (h_stateCheckHeader(state->h_hdr)) {
3245 records = state->h_hdr->records;
3247 if (h_stateAllocMap(state)) {
3252 /* iterate over records restoring host state */
3253 for (i=0; i < records; i++) {
3254 if (h_stateRestoreHost(state) != 0) {
3265 h_stateRestoreIndices(struct fs_dump_state * state)
3267 h_Enumerate_r(h_stateRestoreIndex, hostList, (char *)state);
3272 h_stateRestoreIndex(struct host * h, void *rock)
3274 struct fs_dump_state *state = (struct fs_dump_state *)rock;
3275 if (cb_OldToNew(state, h->z.cblist, &h->z.cblist)) {
3276 return H_ENUMERATE_BAIL(0);
3282 h_stateVerify(struct fs_dump_state * state)
3284 h_Enumerate_r(h_stateVerifyHost, hostList, (char *)state);
3289 h_stateVerifyHost(struct host * h, void* rock)
3291 struct fs_dump_state *state = (struct fs_dump_state *)rock;
3295 ViceLog(0, ("h_stateVerifyHost: error: NULL host pointer in linked list\n"));
3296 return H_ENUMERATE_BAIL(0);
3299 if (h->z.interface) {
3300 for (i = h->z.interface->numberOfInterfaces-1; i >= 0; i--) {
3301 if (h_stateVerifyAddrHash(state, h, h->z.interface->interface[i].addr,
3302 h->z.interface->interface[i].port,
3303 h->z.interface->interface[i].valid)) {
3307 if (h_stateVerifyUuidHash(state, h)) {
3310 } else if (h_stateVerifyAddrHash(state, h, h->z.host, h->z.port, 1)) {
3314 if (cb_stateVerifyHCBList(state, h)) {
3322 * verify a host is either in, or absent from, the addr hash table.
3324 * @param[in] state fs dump state
3325 * @param[in] h host we're dealing with
3326 * @param[in] addr addr to look for (NBO)
3327 * @param[in] port port to look for (NBO)
3328 * @param[in] valid 1 if we're verifying that the specified addr and port
3329 * in the hash table point to the specified host. 0 if we're
3330 * verifying that the specified addr and port do NOT point
3331 * to the specified host
3333 * @return operation status
3334 * @retval 1 failed to verify, bail out
3335 * @retval 0 verified successfully, all is well
3338 h_stateVerifyAddrHash(struct fs_dump_state * state, struct host * h,
3339 afs_uint32 addr, afs_uint16 port, int valid)
3341 int ret = 0, found = 0;
3342 struct host *host = NULL;
3343 struct h_AddrHashChain *chain;
3344 int index = h_HashIndex(addr);
3348 for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
3349 host = chain->hostPtr;
3351 afs_inet_ntoa_r(addr, tmp);
3352 ViceLog(0, ("h_stateVerifyAddrHash: error: addr hash chain has NULL host ptr (lookup addr %s)\n", tmp));
3356 if ((chain->addr == addr) && (chain->port == port)) {
3359 ViceLog(0, ("h_stateVerifyAddrHash: warning: addr hash entry "
3360 "points to different host struct (%d, %d)\n",
3361 h->index, host->index));
3362 state->flags.warnings_generated = 1;
3366 ViceLog(0, ("h_stateVerifyAddrHash: error: addr %s:%u is "
3367 "marked invalid, but points to the containing "
3368 "host\n", afs_inet_ntoa_r(addr, tmp),
3369 (unsigned)htons(port)));
3377 if (chain_len > FS_STATE_H_MAX_ADDR_HASH_CHAIN_LEN) {
3378 ViceLog(0, ("h_stateVerifyAddrHash: error: hash chain length exceeds %d; assuming there's a loop\n",
3379 FS_STATE_H_MAX_ADDR_HASH_CHAIN_LEN));
3386 if (!found && valid) {
3387 afs_inet_ntoa_r(addr, tmp);
3388 if (state->mode == FS_STATE_LOAD_MODE) {
3389 ViceLog(0, ("h_stateVerifyAddrHash: error: addr %s:%u not found in hash\n",
3390 tmp, (unsigned)htons(port)));
3394 ViceLog(0, ("h_stateVerifyAddrHash: warning: addr %s:%u not found in hash\n",
3395 tmp, (unsigned)htons(port)));
3396 state->flags.warnings_generated = 1;
3405 h_stateVerifyUuidHash(struct fs_dump_state * state, struct host * h)
3408 struct host *host = NULL;
3409 struct h_UuidHashChain *chain;
3410 afsUUID * uuidp = &h->z.interface->uuid;
3411 int index = h_UuidHashIndex(uuidp);
3415 for (chain = hostUuidHashTable[index]; chain; chain = chain->next) {
3416 host = chain->hostPtr;
3418 afsUUID_to_string(uuidp, tmp, sizeof(tmp));
3419 ViceLog(0, ("h_stateVerifyUuidHash: error: uuid hash chain has NULL host ptr (lookup uuid %s)\n", tmp));
3423 if (host->z.interface &&
3424 afs_uuid_equal(&host->z.interface->uuid, uuidp)) {
3426 ViceLog(0, ("h_stateVerifyUuidHash: warning: uuid hash entry points to different host struct (%d, %d)\n",
3427 h->index, host->index));
3428 state->flags.warnings_generated = 1;
3432 if (chain_len > FS_STATE_H_MAX_UUID_HASH_CHAIN_LEN) {
3433 ViceLog(0, ("h_stateVerifyUuidHash: error: hash chain length exceeds %d; assuming there's a loop\n",
3434 FS_STATE_H_MAX_UUID_HASH_CHAIN_LEN));
3441 /* Fall through, so host not found */
3443 afsUUID_to_string(uuidp, tmp, sizeof(tmp));
3444 if (state->mode == FS_STATE_LOAD_MODE) {
3445 ViceLog(0, ("h_stateVerifyUuidHash: error: uuid %s not found in hash\n", tmp));
3449 ViceLog(0, ("h_stateVerifyUuidHash: warning: uuid %s not found in hash\n", tmp));
3450 state->flags.warnings_generated = 1;
3457 /* create the host state header structure */
3459 h_stateFillHeader(struct host_state_header * hdr)
3461 hdr->stamp.magic = HOST_STATE_MAGIC;
3462 hdr->stamp.version = HOST_STATE_VERSION;
3466 /* check the contents of the host state header structure */
3468 h_stateCheckHeader(struct host_state_header * hdr)
3472 if (hdr->stamp.magic != HOST_STATE_MAGIC) {
3473 ViceLog(0, ("check_host_state_header: invalid state header\n"));
3476 else if (hdr->stamp.version != HOST_STATE_VERSION) {
3477 ViceLog(0, ("check_host_state_header: unknown version number\n"));
3483 /* allocate the host id mapping table */
3485 h_stateAllocMap(struct fs_dump_state * state)
3487 state->h_map.len = state->h_hdr->index_max + 1;
3488 state->h_map.entries = (struct idx_map_entry_t *)
3489 calloc(state->h_map.len, sizeof(struct idx_map_entry_t));
3490 return (state->h_map.entries != NULL) ? 0 : 1;
3493 /* function called by h_Enumerate to save a host to disk */
3495 h_stateSaveHost(struct host * host, void* rock)
3497 struct fs_dump_state *state = (struct fs_dump_state *) rock;
3498 int if_len=0, hcps_len=0;
3499 struct hostDiskEntry hdsk;
3500 struct host_state_entry_header hdr;
3501 struct Interface * ifp = NULL;
3502 afs_int32 * hcps = NULL;
3503 struct iovec iov[4];
3506 if (h_isBusy_r(host)) {
3508 ViceLog(1, ("Not saving host %s:%d to disk; host appears busy\n",
3509 afs_inet_ntoa_r(host->z.host, hoststr), (int)ntohs(host->z.port)));
3510 /* Make sure we don't try to save callbacks to disk for this host, or
3511 * we'll get confused on restore */
3512 DeleteAllCallBacks_r(host, 1);
3516 memset(&hdr, 0, sizeof(hdr));
3518 if (state->h_hdr->index_max < host->index) {
3519 state->h_hdr->index_max = host->index;
3522 h_hostToDiskEntry_r(host, &hdsk);
3523 if (host->z.interface) {
3524 if_len = sizeof(struct Interface) +
3525 ((host->z.interface->numberOfInterfaces-1) * sizeof(struct AddrPort));
3526 ifp = malloc(if_len);
3527 opr_Assert(ifp != NULL);
3528 memcpy(ifp, host->z.interface, if_len);
3529 hdr.interfaces = host->z.interface->numberOfInterfaces;
3530 iov[iovcnt].iov_base = (char *) ifp;
3531 iov[iovcnt].iov_len = if_len;
3534 if (host->z.hcps.prlist_val) {
3535 hdr.hcps = host->z.hcps.prlist_len;
3536 hcps_len = hdr.hcps * sizeof(afs_int32);
3537 hcps = malloc(hcps_len);
3538 opr_Assert(hcps != NULL);
3539 memcpy(hcps, host->z.hcps.prlist_val, hcps_len);
3540 iov[iovcnt].iov_base = (char *) hcps;
3541 iov[iovcnt].iov_len = hcps_len;
3545 if (hdsk.index > state->h_hdr->index_max)
3546 state->h_hdr->index_max = hdsk.index;
3548 hdr.len = sizeof(struct host_state_entry_header) +
3549 sizeof(struct hostDiskEntry) + if_len + hcps_len;
3550 hdr.magic = HOST_STATE_ENTRY_MAGIC;
3552 iov[0].iov_base = (char *) &hdr;
3553 iov[0].iov_len = sizeof(hdr);
3554 iov[1].iov_base = (char *) &hdsk;
3555 iov[1].iov_len = sizeof(struct hostDiskEntry);
3557 if (fs_stateWriteV(state, iov, iovcnt)) {
3558 ViceLog(0, ("h_stateSaveHost: failed to save host %d", host->index));
3562 fs_stateIncEOF(state, hdr.len);
3564 state->h_hdr->records++;
3571 return H_ENUMERATE_BAIL(0);
3576 /* restores a host from disk */
3578 h_stateRestoreHost(struct fs_dump_state * state)
3580 int ifp_len=0, hcps_len=0, bail=0;
3581 struct host_state_entry_header hdr;
3582 struct hostDiskEntry hdsk;
3583 struct host *host = NULL;
3584 struct Interface *ifp = NULL;
3585 afs_int32 * hcps = NULL;
3586 struct iovec iov[3];
3589 if (fs_stateRead(state, &hdr, sizeof(hdr))) {
3590 ViceLog(0, ("h_stateRestoreHost: failed to read host entry header from dump file '%s'\n",
3596 if (hdr.magic != HOST_STATE_ENTRY_MAGIC) {
3597 ViceLog(0, ("h_stateRestoreHost: fileserver state dump file '%s' is corrupt.\n",
3603 iov[0].iov_base = (char *) &hdsk;
3604 iov[0].iov_len = sizeof(struct hostDiskEntry);
3606 if (hdr.interfaces) {
3607 ifp_len = sizeof(struct Interface) +
3608 ((hdr.interfaces-1) * sizeof(struct AddrPort));
3609 ifp = malloc(ifp_len);
3610 opr_Assert(ifp != NULL);
3611 iov[iovcnt].iov_base = (char *) ifp;
3612 iov[iovcnt].iov_len = ifp_len;
3616 hcps_len = hdr.hcps * sizeof(afs_int32);
3617 hcps = malloc(hcps_len);
3618 opr_Assert(hcps != NULL);
3619 iov[iovcnt].iov_base = (char *) hcps;
3620 iov[iovcnt].iov_len = hcps_len;
3624 if ((ifp_len + hcps_len + sizeof(hdsk) + sizeof(hdr)) != hdr.len) {
3625 ViceLog(0, ("h_stateRestoreHost: host entry header length fields are inconsistent\n"));
3630 if (fs_stateReadV(state, iov, iovcnt)) {
3631 ViceLog(0, ("h_stateRestoreHost: failed to read host entry\n"));
3636 if (!hdr.hcps && hdsk.hcps_valid) {
3637 /* valid, zero-length host cps ; does this ever happen? */
3638 hcps = malloc(sizeof(afs_int32));
3639 opr_Assert(hcps != NULL);
3642 if (hostBusyFlags(hdsk.hostFlags)) {
3644 ViceLog(0, ("h_stateRestoreHost: skipping host %s:%d due to invalid flags 0x%x\n",
3645 afs_inet_ntoa_r(hdsk.host, hoststr), (int)ntohs(hdsk.port),
3646 (unsigned)hdsk.hostFlags));
3648 state->h_map.entries[hdsk.index].valid = FS_STATE_IDX_SKIPPED;
3652 /* for restoring state, we better be able to get a host! */
3654 opr_Assert(host != NULL);
3657 host->z.interface = ifp;
3660 host->z.hcps.prlist_val = hcps;
3661 host->z.hcps.prlist_len = hdr.hcps;
3664 h_diskEntryToHost_r(&hdsk, host);
3665 h_SetupCallbackConn_r(host);
3667 h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
3670 for (i = ifp->numberOfInterfaces-1; i >= 0; i--) {
3671 if (ifp->interface[i].valid &&
3672 !(ifp->interface[i].addr == host->z.host &&
3673 ifp->interface[i].port == host->z.port)) {
3674 h_AddHostToAddrHashTable_r(ifp->interface[i].addr,
3675 ifp->interface[i].port,
3679 h_AddHostToUuidHashTable_r(&ifp->uuid, host);
3681 h_InsertList_r(host);
3683 /* setup host id map entry */
3684 state->h_map.entries[hdsk.index].valid = FS_STATE_IDX_VALID;
3685 state->h_map.entries[hdsk.index].old_idx = hdsk.index;
3686 state->h_map.entries[hdsk.index].new_idx = host->index;
3698 /* serialize a host structure to disk */
3700 h_hostToDiskEntry_r(struct host * in, struct hostDiskEntry * out)
3702 out->host = in->z.host;
3703 out->port = in->z.port;
3704 out->hostFlags = in->z.hostFlags;
3705 out->Console = in->z.Console;
3706 out->hcpsfailed = in->z.hcpsfailed;
3707 out->LastCall = in->z.LastCall;
3708 out->ActiveCall = in->z.ActiveCall;
3709 out->cpsCall = in->z.cpsCall;
3710 out->cblist = in->z.cblist;
3711 out->InSameNetwork = in->z.InSameNetwork;
3713 /* special fields we save, but are not memcpy'd back on restore */
3714 out->index = in->index;
3715 out->hcps_len = in->z.hcps.prlist_len;
3716 out->hcps_valid = (in->z.hcps.prlist_val == NULL) ? 0 : 1;
3719 /* restore a host structure from disk */
3721 h_diskEntryToHost_r(struct hostDiskEntry * in, struct host * out)
3723 out->z.host = in->host;
3724 out->z.port = in->port;
3725 out->z.hostFlags = in->hostFlags;
3726 out->z.Console = in->Console;
3727 out->z.hcpsfailed = in->hcpsfailed;
3728 out->z.LastCall = in->LastCall;
3729 out->z.ActiveCall = in->ActiveCall;
3730 out->z.cpsCall = in->cpsCall;
3731 out->z.cblist = in->cblist;
3732 out->z.InSameNetwork = in->InSameNetwork;
3735 /* index translation routines */
3737 h_OldToNew(struct fs_dump_state * state, afs_uint32 old, afs_uint32 * new)
3741 /* hosts use a zero-based index, so old==0 is valid */
3743 if (old >= state->h_map.len) {
3744 ViceLog(0, ("h_OldToNew: index %d is out of range\n", old));
3746 } else if (state->h_map.entries[old].valid != FS_STATE_IDX_VALID ||
3747 state->h_map.entries[old].old_idx != old) { /* sanity check */
3748 ViceLog(0, ("h_OldToNew: index %d points to an invalid host record\n", old));
3751 *new = state->h_map.entries[old].new_idx;
3756 #endif /* AFS_DEMAND_ATTACH_FS */
3760 * This counts the number of workstations, the number of active workstations,
3761 * and the number of workstations declared "down" (i.e. not heard from
3762 * recently). An active workstation has received a call since the cutoff
3763 * time argument passed.
3766 h_GetWorkStats(int *nump, int *activep, int *delp, afs_int32 cutofftime)
3769 int num = 0, active = 0, del = 0;
3773 for (count = 0, host = hostList; host && count < hostCount; host = host->z.next, count++) {
3774 if (!(host->z.hostFlags & HOSTDELETED)) {
3776 if (host->z.ActiveCall > cutofftime)
3778 if (host->z.hostFlags & VENUSDOWN)
3782 if (count != hostCount) {
3783 ViceLog(0, ("h_GetWorkStats found %d of %d hosts\n", count, hostCount));
3784 } else if (host != NULL) {
3785 ViceLog(0, ("h_GetWorkStats found more than %d hosts\n", hostCount));
3786 ShutDownAndCore(PANIC);
3796 } /*h_GetWorkStats */
3799 h_GetWorkStats64(afs_uint64 *nump, afs_uint64 *activep, afs_uint64 *delp,
3800 afs_int32 cutofftime)
3802 int num, active, del;
3803 h_GetWorkStats(&num, &active, &del, cutofftime);
3812 /*------------------------------------------------------------------------
3813 * PRIVATE h_ClassifyAddress
3816 * Given a target IP address and a candidate IP address (both
3817 * in host byte order), classify the candidate into one of three
3818 * buckets in relation to the target by bumping the counters passed
3822 * a_targetAddr : Target address.
3823 * a_candAddr : Candidate address.
3824 * a_sameNetOrSubnetP : Ptr to counter to bump when the two
3825 * addresses are either in the same network
3826 * or the same subnet.
3827 * a_diffSubnetP : ...when the candidate is in a different
3829 * a_diffNetworkP : ...when the candidate is in a different
3836 * The target and candidate addresses are both in host byte
3837 * order, NOT network byte order, when passed in.
3841 *------------------------------------------------------------------------*/
3844 h_ClassifyAddress(afs_uint32 a_targetAddr, afs_uint32 a_candAddr,
3845 afs_int32 * a_sameNetOrSubnetP, afs_int32 * a_diffSubnetP,
3846 afs_int32 * a_diffNetworkP)
3847 { /*h_ClassifyAddress */
3849 afs_uint32 targetNet;
3850 afs_uint32 targetSubnet;
3852 afs_uint32 candSubnet;
3855 * Put bad values into the subnet info to start with.
3857 targetSubnet = (afs_uint32) 0;
3858 candSubnet = (afs_uint32) 0;
3861 * Pull out the network and subnetwork numbers from the target
3862 * and candidate addresses. We can short-circuit this whole
3863 * affair if the target and candidate addresses are not of the
3866 if (IN_CLASSA(a_targetAddr)) {
3867 if (!(IN_CLASSA(a_candAddr))) {
3868 (*a_diffNetworkP)++;
3871 targetNet = a_targetAddr & IN_CLASSA_NET;
3872 candNet = a_candAddr & IN_CLASSA_NET;
3873 if (IN_SUBNETA(a_targetAddr))
3874 targetSubnet = a_targetAddr & IN_CLASSA_SUBNET;
3875 if (IN_SUBNETA(a_candAddr))
3876 candSubnet = a_candAddr & IN_CLASSA_SUBNET;
3877 } else if (IN_CLASSB(a_targetAddr)) {
3878 if (!(IN_CLASSB(a_candAddr))) {
3879 (*a_diffNetworkP)++;
3882 targetNet = a_targetAddr & IN_CLASSB_NET;
3883 candNet = a_candAddr & IN_CLASSB_NET;
3884 if (IN_SUBNETB(a_targetAddr))
3885 targetSubnet = a_targetAddr & IN_CLASSB_SUBNET;
3886 if (IN_SUBNETB(a_candAddr))
3887 candSubnet = a_candAddr & IN_CLASSB_SUBNET;
3888 } /*Class B target */
3889 else if (IN_CLASSC(a_targetAddr)) {
3890 if (!(IN_CLASSC(a_candAddr))) {
3891 (*a_diffNetworkP)++;
3894 targetNet = a_targetAddr & IN_CLASSC_NET;
3895 candNet = a_candAddr & IN_CLASSC_NET;
3898 * Note that class C addresses can't have subnets,
3899 * so we leave the defaults untouched.
3901 } /*Class C target */
3903 targetNet = a_targetAddr;
3904 candNet = a_candAddr;
3905 } /*Class D address */
3908 * Now, simply compare the extracted net and subnet values for
3909 * the two addresses (which at this point are known to be of the
3912 if (targetNet == candNet) {
3913 if (targetSubnet == candSubnet)
3914 (*a_sameNetOrSubnetP)++;
3918 (*a_diffNetworkP)++;
3920 } /*h_ClassifyAddress */
3923 /*------------------------------------------------------------------------
3924 * EXPORTED h_GetHostNetStats
3927 * Iterate through the host table, and classify each (non-deleted)
3928 * host entry into ``proximity'' categories (same net or subnet,
3929 * different subnet, different network).
3932 * a_numHostsP : Set to total number of (non-deleted) hosts.
3933 * a_sameNetOrSubnetP : Set to # hosts on same net/subnet as server.
3934 * a_diffSubnetP : Set to # hosts on diff subnet as server.
3935 * a_diffNetworkP : Set to # hosts on diff network as server.
3941 * We only count non-deleted hosts. The storage pointed to by our
3942 * parameters is zeroed upon entry.
3946 *------------------------------------------------------------------------*/
3949 h_GetHostNetStats(afs_int32 * a_numHostsP, afs_int32 * a_sameNetOrSubnetP,
3950 afs_int32 * a_diffSubnetP, afs_int32 * a_diffNetworkP)
3951 { /*h_GetHostNetStats */
3953 struct host *hostP; /*Ptr to current host entry */
3954 afs_uint32 currAddr_HBO; /*Curr host addr, host byte order */
3958 * Clear out the storage pointed to by our parameters.
3960 *a_numHostsP = (afs_int32) 0;
3961 *a_sameNetOrSubnetP = (afs_int32) 0;
3962 *a_diffSubnetP = (afs_int32) 0;
3963 *a_diffNetworkP = (afs_int32) 0;
3966 for (count = 0, hostP = hostList; hostP && count < hostCount; hostP = hostP->z.next, count++) {
3967 if (!(hostP->z.hostFlags & HOSTDELETED)) {
3969 * Bump the number of undeleted host entries found.
3970 * In classifying the current entry's address, make
3971 * sure to first convert to host byte order.
3974 currAddr_HBO = (afs_uint32) ntohl(hostP->z.host);
3975 h_ClassifyAddress(FS_HostAddr_HBO, currAddr_HBO,
3976 a_sameNetOrSubnetP, a_diffSubnetP,
3978 } /*Only look at non-deleted hosts */
3979 } /*For each host record hashed to this index */
3980 if (count != hostCount) {
3981 ViceLog(0, ("h_GetHostNetStats found %d of %d hosts\n", count, hostCount));
3982 } else if (hostP != NULL) {
3983 ViceLog(0, ("h_GetHostNetStats found more than %d hosts\n", hostCount));
3984 ShutDownAndCore(PANIC);
3987 } /*h_GetHostNetStats */
3989 static afs_uint32 checktime;
3990 static afs_uint32 clientdeletetime;
3991 static struct AFSFid zerofid;
3995 * XXXX: This routine could use Multi-Rx to avoid serializing the timeouts.
3996 * Since it can serialize them, and pile up, it should be a separate LWP
3997 * from other events.
4001 CheckHost_r(struct host *host, void *dummy)
4003 struct client *client;
4004 struct rx_connection *cb_conn = NULL;
4007 #ifdef AFS_DEMAND_ATTACH_FS
4008 /* kill the checkhost lwp ASAP during shutdown */
4010 if (fs_state.mode == FS_MODE_SHUTDOWN) {
4012 return H_ENUMERATE_BAIL(0);
4017 /* Host is held by h_Enumerate_r */
4018 for (client = host->z.FirstClient; client; client = client->z.next) {
4019 if (client->z.refCount == 0 && client->z.LastCall < clientdeletetime) {
4020 client->z.deleted = 1;
4021 host->z.hostFlags |= CLIENTDELETED;
4024 if (host->z.LastCall < checktime) {
4026 if (!(host->z.hostFlags & HOSTDELETED)) {
4027 host->z.hostFlags |= HWHO_INPROGRESS;
4028 cb_conn = host->z.callback_rxcon;
4029 rx_GetConnection(cb_conn);
4030 if (host->z.LastCall < clientdeletetime) {
4031 host->z.hostFlags |= HOSTDELETED;
4032 if (!(host->z.hostFlags & VENUSDOWN)) {
4033 host->z.hostFlags &= ~ALTADDR; /* alternate address invalid */
4034 if (host->z.interface) {
4037 RXAFSCB_InitCallBackState3(cb_conn,
4043 RXAFSCB_InitCallBackState(cb_conn);
4046 host->z.hostFlags |= ALTADDR; /* alternate addresses valid */
4049 (void)afs_inet_ntoa_r(host->z.host, hoststr);
4051 ("CB: RCallBackConnectBack (host.c) failed for host %s:%d\n",
4052 hoststr, ntohs(host->z.port)));
4053 host->z.hostFlags |= VENUSDOWN;
4055 /* Note: it's safe to delete hosts even if they have call
4056 * back state, because break delayed callbacks (called when a
4057 * message is received from the workstation) will always send a
4058 * break all call backs to the workstation if there is no
4063 if (!(host->z.hostFlags & VENUSDOWN) && host->z.cblist) {
4065 (void)afs_inet_ntoa_r(host->z.host, hoststr);
4066 if (host->z.interface) {
4067 afsUUID uuid = host->z.interface->uuid;
4069 code = RXAFSCB_ProbeUuid(cb_conn, &uuid);
4072 if (MultiProbeAlternateAddress_r(host)) {
4073 ViceLog(0,("CheckHost_r: Probing all interfaces of host %s:%d failed, code %d\n",
4074 hoststr, ntohs(host->z.port), code));
4075 host->z.hostFlags |= VENUSDOWN;
4080 code = RXAFSCB_Probe(cb_conn);
4084 ("CheckHost_r: Probe failed for host %s:%d, code %d\n",
4085 hoststr, ntohs(host->z.port), code));
4086 host->z.hostFlags |= VENUSDOWN;
4092 rx_PutConnection(cb_conn);
4095 host->z.hostFlags &= ~HWHO_INPROGRESS;
4105 * Set VenusDown for any hosts that have not had a call in 15 minutes and
4106 * don't respond to a probe. Note that VenusDown can only be cleared if
4107 * a message is received from the host (see ServerLWP in file.c).
4108 * Delete hosts that have not had any calls in 1 hour, clients that
4109 * have not had any calls in 15 minutes.
4111 * This routine is called roughly every 5 minutes.
4116 afs_uint32 now = time(NULL);
4118 memset(&zerofid, 0, sizeof(zerofid));
4120 * Send a probe to the workstation if it hasn't been heard from in
4123 checktime = now - 15 * 60;
4124 clientdeletetime = now - 120 * 60; /* 2 hours ago */
4127 h_Enumerate_r(CheckHost_r, hostList, NULL);
4132 * This is called with host locked and held. At this point, the
4133 * hostAddrHashTable has an entry for the primary addr/port inserted
4134 * by h_Alloc_r(). No other interfaces should be considered valid.
4136 * The addresses in the interfaceAddr list are in host byte order.
4139 initInterfaceAddr_r(struct host *host, struct interfaceAddr *interf)
4146 struct Interface *interface;
4149 afs_uint16 port7001 = htons(7001);
4154 number = interf->numberOfInterfaces;
4155 myAddr = host->z.host; /* current interface address */
4156 myPort = host->z.port; /* current port */
4159 ("initInterfaceAddr : host %s:%d numAddr %d\n",
4160 afs_inet_ntoa_r(myAddr, hoststr), ntohs(myPort), number));
4162 /* validation checks */
4163 if (number < 0 || number > AFS_MAX_INTERFACE_ADDR) {
4165 ("Invalid number of alternate addresses is %d\n", number));
4170 * The client's notion of its own IP addresses is not reliable.
4172 * 1. The client list might contain private address ranges which
4173 * are likely to be re-used by many clients allocated addresses
4176 * 2. The client list will not include any public addresses that
4177 * are hidden by a NAT.
4179 * 3. Private address ranges that are exposed to the server will
4180 * be obtained from the rx connections that use them.
4182 * 4. Lists provided by the client are not necessarily truthful.
4183 * Many existing clients (UNIX) do not refresh the IP address
4184 * list as the actual assigned addresses change. The end result
4185 * is that they report the initial address list for the lifetime
4186 * of the process. In other words, a client can report addresses
4187 * that they are in fact not using. Adding these addresses to
4188 * the host interface list without verification is not only
4189 * pointless, it is downright dangerous.
4191 * We therefore do not add alternate addresses to the addr hash table.
4192 * We only use them for multi-rx callback breaks.
4196 * Convert IP addresses to network byte order, and remove
4197 * duplicate and loopback IP addresses from the interface list, and
4198 * determine whether or not the incoming addr/port is
4199 * listed. Note that if the address matches it is not
4200 * truly a match because the port number for the entries
4201 * in the interface list are port 7001 and the port number
4202 * for this connection might not be 7001.
4204 for (i = 0, count = 0, found = 0; i < number; i++) {
4205 if (rx_IsLoopbackAddr(interf->addr_in[i])) {
4208 interf->addr_in[i] = htonl(interf->addr_in[i]);
4209 for (j = 0; j < count; j++) {
4210 if (interf->addr_in[j] == interf->addr_in[i])
4214 interf->addr_in[count] = interf->addr_in[i];
4215 if (interf->addr_in[count] == myAddr &&
4223 * Allocate and initialize an interface structure for this host.
4226 interface = malloc(sizeof(struct Interface) +
4227 (sizeof(struct AddrPort) * (count - 1)));
4229 ViceLogThenPanic(0, ("Failed malloc in initInterfaceAddr_r 1\n"));
4231 interface->numberOfInterfaces = count;
4233 interface = malloc(sizeof(struct Interface) +
4234 (sizeof(struct AddrPort) * count));
4236 ViceLogThenPanic(0, ("Failed malloc in initInterfaceAddr_r 2\n"));
4238 interface->numberOfInterfaces = count + 1;
4239 interface->interface[count].addr = myAddr;
4240 interface->interface[count].port = myPort;
4241 interface->interface[count].valid = 1;
4244 for (i = 0; i < count; i++) {
4246 interface->interface[i].addr = interf->addr_in[i];
4247 /* We store the port as 7001 because the addresses reported by
4248 * TellMeAboutYourself and WhoAreYou RPCs are only valid if they
4249 * are coming from fully connected hosts (no NAT/PATs)
4251 interface->interface[i].port = port7001;
4252 interface->interface[i].valid =
4253 (interf->addr_in[i] == myAddr && port7001 == myPort) ? 1 : 0;
4256 interface->uuid = interf->uuid;
4258 opr_Assert(!host->z.interface);
4259 host->z.interface = interface;
4261 h_AddHostToUuidHashTable_r(&interface->uuid, host);
4263 if (GetLogLevel() >= 125) {
4264 afsUUID_to_string(&interface->uuid, uuidstr, 127);
4266 ViceLog(125, ("--- uuid %s\n", uuidstr));
4267 for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
4268 ViceLog(125, ("--- alt address %s:%d\n",
4269 afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr),
4270 ntohs(host->z.interface->interface[i].port)));
4277 /* deleted a HashChain structure for this address and host */
4278 /* returns 1 on success */
4280 h_DeleteHostFromAddrHashTable_r(afs_uint32 addr, afs_uint16 port,
4284 struct h_AddrHashChain **hp, *th;
4286 if (addr == 0 && port == 0)
4289 for (hp = &hostAddrHashTable[h_HashIndex(addr)]; (th = *hp);
4291 opr_Assert(th->hostPtr);
4292 if (th->hostPtr == host && th->addr == addr && th->port == port) {
4293 ViceLog(125, ("h_DeleteHostFromAddrHashTable_r: host %" AFS_PTR_FMT " (%s:%d)\n",
4294 host, afs_inet_ntoa_r(host->z.host, hoststr),
4295 ntohs(host->z.port)));
4302 ("h_DeleteHostFromAddrHashTable_r: host %" AFS_PTR_FMT " (%s:%d) not found\n",
4303 host, afs_inet_ntoa_r(host->z.host, hoststr),
4304 ntohs(host->z.port)));
4310 ** prints out all alternate interface address for the host. The 'level'
4311 ** parameter indicates what level of debugging sets this output
4314 printInterfaceAddr(struct host *host, int level)
4319 if (host->z.interface) {
4320 /* check alternate addresses */
4321 number = host->z.interface->numberOfInterfaces;
4323 ViceLog(level, ("no-addresses "));
4325 for (i = 0; i < number; i++)
4326 ViceLog(level, ("%s:%d ",
4327 afs_inet_ntoa_r(host->z.interface->interface[i].addr,
4329 ntohs(host->z.interface->interface[i].port)));
4332 ViceLog(level, ("\n"));