Remove DUX/OSF code
[openafs.git] / src / viced / host.c
index 1eee625..352c509 100644 (file)
@@ -53,7 +53,6 @@ extern int CurrentConnections;
 extern int SystemId;
 extern int AnonymousID;
 extern prlist AnonCPS;
-extern int LogLevel;
 extern struct afsconf_dir *confDir;    /* config dir object */
 extern int lwps;               /* the max number of server threads */
 extern afsUUID FS_HostUUID;
@@ -108,6 +107,9 @@ void h_TossStuff_r(struct host *host);
 #define        IN_CLASSB_SUBNET        0xffffff00
 #endif
 
+#define hostBusyFlags(hf) \
+       ((hf) & (HWHO_INPROGRESS | HCPS_INPROGRESS | HCPS_WAITING) \
+       || !((hf) & ALTADDR))
 
 /* get a new block of CEs and chain it on CEFree */
 static void
@@ -124,9 +126,9 @@ GetCEBlock(void)
 
     for (i = 0; i < (CESPERBLOCK - 1); i++) {
        Lock_Init(&block->entry[i].lock);
-       block->entry[i].next = &(block->entry[i + 1]);
+       block->entry[i].z.next = &(block->entry[i + 1]);
     }
-    block->entry[CESPERBLOCK - 1].next = 0;
+    block->entry[CESPERBLOCK - 1].z.next = 0;
     Lock_Init(&block->entry[CESPERBLOCK - 1].lock);
     CEFree = (struct client *)block;
     CEBlocks++;
@@ -148,9 +150,9 @@ GetCE(void)
     }
 
     entry = CEFree;
-    CEFree = entry->next;
+    CEFree = entry->z.next;
     CEs++;
-    memset(entry, 0, CLIENT_TO_ZERO(entry));
+    memset(&entry->z, 0, sizeof(struct client_to_zero));
     return (entry);
 
 }                              /*GetCE */
@@ -160,9 +162,9 @@ GetCE(void)
 static void
 FreeCE(struct client *entry)
 {
-    entry->VenusEpoch = 0;
-    entry->sid = 0;
-    entry->next = CEFree;
+    entry->z.VenusEpoch = 0;
+    entry->z.sid = 0;
+    entry->z.next = CEFree;
     CEFree = entry;
     CEs--;
 
@@ -214,10 +216,10 @@ GetHTBlock(void)
     for (i = 0; i < (h_HTSPERBLOCK); i++)
        Lock_Init(&block->entry[i].lock);
     for (i = 0; i < (h_HTSPERBLOCK - 1); i++)
-       block->entry[i].next = &(block->entry[i + 1]);
+       block->entry[i].z.next = &(block->entry[i + 1]);
     for (i = 0; i < (h_HTSPERBLOCK); i++)
        block->entry[i].index = index++;
-    block->entry[h_HTSPERBLOCK - 1].next = 0;
+    block->entry[h_HTSPERBLOCK - 1].z.next = 0;
     HTFree = (struct host *)block;
     hosttableptrs[HTBlocks++] = block->entry;
 
@@ -235,9 +237,9 @@ GetHT(void)
     if (HTFree == NULL)
        return NULL;
     entry = HTFree;
-    HTFree = entry->next;
+    HTFree = entry->z.next;
     HTs++;
-    memset(entry, 0, HOST_TO_ZERO(entry));
+    memset(&entry->z, 0, sizeof(struct host_to_zero));
     return (entry);
 
 }                              /*GetHT */
@@ -247,7 +249,7 @@ GetHT(void)
 static void
 FreeHT(struct host *entry)
 {
-    entry->next = HTFree;
+    entry->z.next = HTFree;
     HTFree = entry;
     HTs--;
 
@@ -256,7 +258,7 @@ FreeHT(struct host *entry)
 afs_int32
 hpr_Initialize(struct ubik_client **uclient)
 {
-    afs_int32 code;
+    afs_int32 code, code2;
     struct rx_connection *serverconns[MAXSERVERS];
     struct rx_securityClass *sc;
     struct afsconf_dir *tdir;
@@ -268,21 +270,21 @@ hpr_Initialize(struct ubik_client **uclient)
     tdir = afsconf_Open(FS_configPath);
     if (!tdir) {
        ViceLog(0,
-               ("hpr_Initialize: Could not open configuration directory: %s",
+               ("hpr_Initialize: Could not open configuration directory: %s\n",
                 FS_configPath));
        return -1;
     }
 
     code = afsconf_GetLocalCell(tdir, cellstr, sizeof(cellstr));
     if (code) {
-       ViceLog(0, ("hpr_Initialize: Could not get local cell. [%d]", code));
+       ViceLog(0, ("hpr_Initialize: Could not get local cell. [%d]\n", code));
        afsconf_Close(tdir);
        return code;
     }
 
     code = afsconf_GetCellInfo(tdir, cellstr, "afsprot", &info);
     if (code) {
-       ViceLog(0, ("hpr_Initialize: Could not locate cell %s in %s/%s",
+       ViceLog(0, ("hpr_Initialize: Could not locate cell %s in %s/%s\n",
                    cellstr, tdir->name, AFSDIR_CELLSERVDB_FILE));
        afsconf_Close(tdir);
        return code;
@@ -290,7 +292,7 @@ hpr_Initialize(struct ubik_client **uclient)
 
     code = rx_Init(0);
     if (code) {
-       ViceLog(0, ("hpr_Initialize: Could not initialize rx."));
+       ViceLog(0, ("hpr_Initialize: Could not initialize rx.\n"));
        afsconf_Close(tdir);
         return code;
     }
@@ -301,14 +303,14 @@ hpr_Initialize(struct ubik_client **uclient)
     code = afsconf_ClientAuthSecure(tdir, &sc, &scIndex);
     if (code) {
        ViceLog(0, ("hpr_Initialize: clientauthsecure returns %d %s "
-                   "(so trying noauth)", code, afs_error_message(code)));
+                   "(so trying noauth)\n", code, afs_error_message(code)));
        scIndex = RX_SECIDX_NULL;
        sc = rxnull_NewClientSecurityObject();
     }
 
     if (scIndex == RX_SECIDX_NULL)
        ViceLog(0, ("hpr_Initialize: Could not get afs tokens, "
-                   "running unauthenticated. [%d]", code));
+                   "running unauthenticated. [%d]\n", code));
 
     memset(serverconns, 0, sizeof(serverconns));        /* terminate list!!! */
     for (i = 0; i < info.numServers; i++) {
@@ -320,10 +322,14 @@ hpr_Initialize(struct ubik_client **uclient)
 
     code = ubik_ClientInit(serverconns, uclient);
     if (code) {
-       ViceLog(0, ("hpr_Initialize: ubik client init failed. [%d]", code));
+       ViceLog(0, ("hpr_Initialize: ubik client init failed. [%d]\n", code));
     }
     afsconf_Close(tdir);
-    code = rxs_Release(sc);
+    code2 = rxs_Release(sc);
+
+    if (code == 0) {
+       code = code2;
+    }
     return code;
 }
 
@@ -408,7 +414,7 @@ hpr_IdToName(idlist *ids, namelist *names)
     if (code)
        return code;
 
-    code = ubik_PR_IDToName(uclient, 0, ids, names);
+    code = string_PR_IDToName(uclient, 0, ids, names);
     return code;
 }
 
@@ -560,22 +566,22 @@ h_gethostcps_r(struct host *host, afs_int32 now)
     int slept = 0;
 
     /* wait if somebody else is already doing the getCPS call */
-    while (host->hostFlags & HCPS_INPROGRESS) {
+    while (host->z.hostFlags & HCPS_INPROGRESS) {
        slept = 1;              /* I did sleep */
-       host->hostFlags |= HCPS_WAITING;        /* I am sleeping now */
+       host->z.hostFlags |= HCPS_WAITING;      /* I am sleeping now */
        opr_cv_wait(&host->cond, &host_glock_mutex);
     }
 
 
-    host->hostFlags |= HCPS_INPROGRESS;        /* mark as CPSCall in progress */
-    if (host->hcps.prlist_val)
-       free(host->hcps.prlist_val);    /* this is for hostaclRefresh */
-    host->hcps.prlist_val = NULL;
-    host->hcps.prlist_len = 0;
-    host->cpsCall = slept ? time(NULL) : (now);
+    host->z.hostFlags |= HCPS_INPROGRESS;      /* mark as CPSCall in progress */
+    if (host->z.hcps.prlist_val)
+       free(host->z.hcps.prlist_val);  /* this is for hostaclRefresh */
+    host->z.hcps.prlist_val = NULL;
+    host->z.hcps.prlist_len = 0;
+    host->z.cpsCall = slept ? time(NULL) : (now);
 
     H_UNLOCK;
-    code = hpr_GetHostCPS(ntohl(host->host), &host->hcps);
+    code = hpr_GetHostCPS(ntohl(host->z.host), &host->z.hcps);
     H_LOCK;
     if (code) {
         char hoststr[16];
@@ -598,27 +604,27 @@ h_gethostcps_r(struct host *host, afs_int32 now)
             * restart. Since the fileserver will start before the ptservers (and thus before
             * quorums are complete) clients will be utilizing all the fileserver's lwps!!
             */
-           host->hcpsfailed = 1;
+           host->z.hcpsfailed = 1;
            ViceLog(0,
                    ("Warning:  GetHostCPS failed (%d) for %p (%s:%d); will retry\n",
-                    code, host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
+                    code, host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
        } else {
-           host->hcpsfailed = 0;
+           host->z.hcpsfailed = 0;
            ViceLog(1,
                    ("gethost:  GetHostCPS failed (%d) for %p (%s:%d); ignored\n",
-                    code, host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
+                    code, host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
        }
-       if (host->hcps.prlist_val)
-           free(host->hcps.prlist_val);
-       host->hcps.prlist_val = NULL;
-       host->hcps.prlist_len = 0;      /* Make sure it's zero */
+       if (host->z.hcps.prlist_val)
+           free(host->z.hcps.prlist_val);
+       host->z.hcps.prlist_val = NULL;
+       host->z.hcps.prlist_len = 0;    /* Make sure it's zero */
     } else
-       host->hcpsfailed = 0;
+       host->z.hcpsfailed = 0;
 
-    host->hostFlags &= ~HCPS_INPROGRESS;
+    host->z.hostFlags &= ~HCPS_INPROGRESS;
     /* signal all who are waiting */
-    if (host->hostFlags & HCPS_WAITING) {      /* somebody is waiting */
-       host->hostFlags &= ~HCPS_WAITING;
+    if (host->z.hostFlags & HCPS_WAITING) {    /* somebody is waiting */
+       host->z.hostFlags &= ~HCPS_WAITING;
        opr_cv_broadcast(&host->cond);
     }
 }
@@ -632,7 +638,7 @@ h_flushhostcps(afs_uint32 hostaddr, afs_uint16 hport)
     H_LOCK;
     h_Lookup_r(hostaddr, hport, &host);
     if (host) {
-       host->hcpsfailed = 1;
+       host->z.hcpsfailed = 1;
        h_Release_r(host);
     }
     H_UNLOCK;
@@ -663,44 +669,40 @@ h_Alloc_r(struct rx_connection *r_con)
      * nobody else knows about it. */
     ObtainWriteLock(&host->lock);
 
-    host->host = rxr_HostOf(r_con);
-    host->port = rxr_PortOf(r_con);
+    host->z.host = rxr_HostOf(r_con);
+    host->z.port = rxr_PortOf(r_con);
 
-    h_AddHostToAddrHashTable_r(host->host, host->port, host);
+    h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
 
     if (consolePort == 0) {    /* find the portal number for console */
-#if    defined(AFS_OSF_ENV)
-       serverentry = getservbyname("ropcons", "");
-#else
        serverentry = getservbyname("ropcons", 0);
-#endif
        if (serverentry)
            consolePort = serverentry->s_port;
        else
            consolePort = htons(DEF_ROPCONS);   /* Use a default */
     }
-    if (host->port == consolePort)
-       host->Console = 1;
+    if (host->z.port == consolePort)
+       host->z.Console = 1;
     /* Make a callback channel even for the console, on the off chance that it
      * makes a request that causes a break call back.  It shouldn't. */
     h_SetupCallbackConn_r(host);
-    host->LastCall = host->cpsCall = host->ActiveCall = time(NULL);
-    host->hostFlags = 0;
-    host->hcps.prlist_val = NULL;
-    host->hcps.prlist_len = 0;
-    host->interface = NULL;
+    host->z.LastCall = host->z.cpsCall = host->z.ActiveCall = time(NULL);
+    host->z.hostFlags = 0;
+    host->z.hcps.prlist_val = NULL;
+    host->z.hcps.prlist_len = 0;
+    host->z.interface = NULL;
 #ifdef undef
-    host->hcpsfailed = 0;      /* save cycles */
+    host->z.hcpsfailed = 0;    /* save cycles */
     h_gethostcps(host);                /* do this under host hold/lock */
 #endif
-    host->FirstClient = NULL;
+    host->z.FirstClient = NULL;
     h_InsertList_r(host);      /* update global host List */
     /*
      * Compare the new host's IP address (in host byte order) with ours
      * (the File Server's), remembering if they are in the same network.
      */
-    newHostAddr_HBO = (afs_uint32) ntohl(host->host);
-    host->InSameNetwork =
+    newHostAddr_HBO = (afs_uint32) ntohl(host->z.host);
+    host->z.InSameNetwork =
        h_AddrInSameNetwork(FS_HostAddr_HBO, newHostAddr_HBO);
     return host;
 
@@ -715,10 +717,10 @@ h_SetupCallbackConn_r(struct host * host)
 {
     if (!sc)
        sc = rxnull_NewClientSecurityObject();
-    host->callback_rxcon =
-       rx_NewConnection(host->host, host->port, 1, sc, 0);
-    rx_SetConnDeadTime(host->callback_rxcon, 50);
-    rx_SetConnHardDeadTime(host->callback_rxcon, AFS_HARDDEADTIME);
+    host->z.callback_rxcon =
+       rx_NewConnection(host->z.host, host->z.port, 1, sc, 0);
+    rx_SetConnDeadTime(host->z.callback_rxcon, 50);
+    rx_SetConnHardDeadTime(host->z.callback_rxcon, AFS_HARDDEADTIME);
 }
 
 /* h_Lookup_r
@@ -740,16 +742,16 @@ h_Lookup_r(afs_uint32 haddr, afs_uint16 hport, struct host **hostp)
     for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
        host = chain->hostPtr;
        opr_Assert(host);
-       if (!(host->hostFlags & HOSTDELETED) && chain->addr == haddr
+       if (!(host->z.hostFlags & HOSTDELETED) && chain->addr == haddr
            && chain->port == hport) {
-           if ((host->hostFlags & HWHO_INPROGRESS) &&
+           if ((host->z.hostFlags & HWHO_INPROGRESS) &&
                h_threadquota(host->lock.num_waiting)) {
                *hostp = 0;
                return VBUSY;
            }
            h_Hold_r(host);
            h_Lock_r(host);
-           if (host->hostFlags & HOSTDELETED) {
+           if (host->z.hostFlags & HOSTDELETED) {
                h_Unlock_r(host);
                h_Release_r(host);
                host = NULL;
@@ -757,7 +759,7 @@ h_Lookup_r(afs_uint32 haddr, afs_uint16 hport, struct host **hostp)
            }
            h_Unlock_r(host);
            now = time(NULL);   /* always evaluate "now" */
-           if (host->hcpsfailed || (host->cpsCall + hostaclRefresh < now)) {
+           if (host->z.hcpsfailed || (host->z.cpsCall + hostaclRefresh < now)) {
                /*
                 * Every hostaclRefresh period (def 2 hrs) get the new
                 * membership list for the host.  Note this could be the
@@ -787,8 +789,8 @@ h_LookupUuid_r(afsUUID * uuidp)
     for (chain = hostUuidHashTable[index]; chain; chain = chain->next) {
        host = chain->hostPtr;
        opr_Assert(host);
-       if (!(host->hostFlags & HOSTDELETED) && host->interface
-           && afs_uuid_equal(&host->interface->uuid, uuidp)) {
+       if (!(host->z.hostFlags & HOSTDELETED) && host->z.interface
+           && afs_uuid_equal(&host->z.interface->uuid, uuidp)) {
             return host;
        }
     }
@@ -798,7 +800,7 @@ h_LookupUuid_r(afsUUID * uuidp)
 
 /* h_TossStuff_r:  Toss anything in the host structure (the host or
  * clients marked for deletion.  Called from h_Release_r ONLY.
- * To be called, there must be no holds, and either host->deleted
+ * To be called, there must be no holds, and either host->z.deleted
  * or host->clientDeleted must be set.
  */
 void
@@ -808,7 +810,7 @@ h_TossStuff_r(struct host *host)
     int code;
     int wasdeleted = 0;
 
-    if ((host->hostFlags & HOSTDELETED)) {
+    if ((host->z.hostFlags & HOSTDELETED)) {
        wasdeleted = 1;
     }
 
@@ -826,9 +828,9 @@ h_TossStuff_r(struct host *host)
        if (wasdeleted) {
            /* someone locked the host while HOSTDELETED was set; that is bad */
            ViceLog(0, ("Warning:  h_TossStuff_r failed; Host %" AFS_PTR_FMT
-                       " (%s:%d flags 0x%x) was locked.\n",
-                       host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port),
-                       (unsigned)host->hostFlags));
+                       " (%s:%d flags 0x%x) was locked.\n",
+                       host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
+                       (unsigned)host->z.hostFlags));
        }
        return;
     } else {
@@ -838,21 +840,21 @@ h_TossStuff_r(struct host *host)
     /* if somebody still has this host held */
     /* we must check this _after_ h_NBLock_r, since h_NBLock_r can drop and
      * reacquire H_LOCK */
-    if (host->refCount > 0) {
+    if (host->z.refCount > 0) {
        char hoststr[16];
        if (wasdeleted) {
            /* someone grabbed a ref while HOSTDELETED was set; that is bad */
            ViceLog(0, ("Warning:  h_TossStuff_r failed; Host %" AFS_PTR_FMT
-                       " (%s:%d flags 0x%x) was held.\n",
-                       host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port),
-                       (unsigned)host->hostFlags));
+                       " (%s:%d flags 0x%x) was held.\n",
+                       host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
+                       (unsigned)host->z.hostFlags));
        }
        return;
     }
 
     /* ASSUMPTION: rxi_FreeConnection() does not yield */
-    for (cp = &host->FirstClient; (client = *cp);) {
-       if ((host->hostFlags & HOSTDELETED) || client->deleted) {
+    for (cp = &host->z.FirstClient; (client = *cp);) {
+       if ((host->z.hostFlags & HOSTDELETED) || client->z.deleted) {
            int code;
            ObtainWriteLockNoBlock(&client->lock, code);
            if (code < 0) {
@@ -860,79 +862,79 @@ h_TossStuff_r(struct host *host)
                ViceLog(0,
                        ("Warning: h_TossStuff_r failed: Host %p (%s:%d) "
                         "client %p was locked.\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr),
-                        ntohs(host->port), client));
+                        host, afs_inet_ntoa_r(host->z.host, hoststr),
+                        ntohs(host->z.port), client));
                return;
            }
 
-           if (client->refCount) {
+           if (client->z.refCount) {
                char hoststr[16];
                ViceLog(0,
                        ("Warning: h_TossStuff_r failed: Host %p (%s:%d) "
                         "client %p refcount %d.\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr),
-                        ntohs(host->port), client, client->refCount));
+                        host, afs_inet_ntoa_r(host->z.host, hoststr),
+                        ntohs(host->z.port), client, client->z.refCount));
                /* This is the same thing we do if the host is locked */
                ReleaseWriteLock(&client->lock);
                return;
            }
-           client->CPS.prlist_len = 0;
-           if ((client->ViceId != ANONYMOUSID) && client->CPS.prlist_val)
-               free(client->CPS.prlist_val);
-           client->CPS.prlist_val = NULL;
+           client->z.CPS.prlist_len = 0;
+           if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
+               free(client->z.CPS.prlist_val);
+           client->z.CPS.prlist_val = NULL;
            CurrentConnections--;
-           *cp = client->next;
+           *cp = client->z.next;
            ReleaseWriteLock(&client->lock);
            FreeCE(client);
        } else
-           cp = &client->next;
+           cp = &client->z.next;
     }
 
     /* We've just cleaned out all the deleted clients; clear the flag */
-    host->hostFlags &= ~CLIENTDELETED;
+    host->z.hostFlags &= ~CLIENTDELETED;
 
-    if (host->hostFlags & HOSTDELETED) {
+    if (host->z.hostFlags & HOSTDELETED) {
        struct rx_connection *rxconn;
        struct AddrPort hostAddrPort;
        int i;
 
-       if (host->Console & 1)
+       if (host->z.Console & 1)
            Console--;
-       if ((rxconn = host->callback_rxcon)) {
-           host->callback_rxcon = (struct rx_connection *)0;
+       if ((rxconn = host->z.callback_rxcon)) {
+           host->z.callback_rxcon = (struct rx_connection *)0;
            rx_DestroyConnection(rxconn);
        }
-       if (host->hcps.prlist_val)
-           free(host->hcps.prlist_val);
-       host->hcps.prlist_val = NULL;
-       host->hcps.prlist_len = 0;
-       free(host->tmay_caps.Capabilities_val);
-       host->tmay_caps.Capabilities_val = NULL;
-       host->tmay_caps.Capabilities_len = 0;
+       if (host->z.hcps.prlist_val)
+           free(host->z.hcps.prlist_val);
+       host->z.hcps.prlist_val = NULL;
+       host->z.hcps.prlist_len = 0;
+       free(host->z.tmay_caps.Capabilities_val);
+       host->z.tmay_caps.Capabilities_val = NULL;
+       host->z.tmay_caps.Capabilities_len = 0;
        DeleteAllCallBacks_r(host, 1);
-       host->hostFlags &= ~RESETDONE;  /* just to be safe */
+       host->z.hostFlags &= ~RESETDONE;        /* just to be safe */
 
        /* if alternate addresses do not exist */
-       if (!(host->interface)) {
-           h_DeleteHostFromAddrHashTable_r(host->host, host->port, host);
+       if (!(host->z.interface)) {
+           h_DeleteHostFromAddrHashTable_r(host->z.host, host->z.port, host);
        } else {
             h_DeleteHostFromUuidHashTable_r(host);
-           h_DeleteHostFromAddrHashTable_r(host->host, host->port, host);
+           h_DeleteHostFromAddrHashTable_r(host->z.host, host->z.port, host);
            /* delete the hash entry for each valid alternate addresses */
-           for (i = 0; i < host->interface->numberOfInterfaces; i++) {
-               hostAddrPort = host->interface->interface[i];
+           for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
+               hostAddrPort = host->z.interface->interface[i];
                 /*
                  * if the interface addr/port is the primary, we already
                  * removed it.  If the addr/port is not valid, its not
                  * in the hash table.
                  */
                 if (hostAddrPort.valid &&
-                    (host->host != hostAddrPort.addr ||
-                     host->port != hostAddrPort.port))
+                   (host->z.host != hostAddrPort.addr ||
+                    host->z.port != hostAddrPort.port))
                     h_DeleteHostFromAddrHashTable_r(hostAddrPort.addr, hostAddrPort.port, host);
            }
-           free(host->interface);
-           host->interface = NULL;
+           free(host->z.interface);
+           host->z.interface = NULL;
        }                       /* if alternate address exists */
 
         h_DeleteList_r(host);  /* remove host from global host List */
@@ -968,9 +970,9 @@ h_Enumerate(int (*proc) (struct host*, void *), void *param)
     }
     for (totalCount = count = 0, host = hostList;
          host && totalCount < hostCount;
-        host = host->next, totalCount++) {
+        host = host->z.next, totalCount++) {
 
-       if (!(host->hostFlags & HOSTDELETED)) {
+       if (!(host->z.hostFlags & HOSTDELETED)) {
            list[count] = host;
            h_Hold_r(host);
            count++;
@@ -1042,11 +1044,11 @@ h_Enumerate_r(int (*proc) (struct host *, void *),
     /* find the first non-deleted host, so we know where to actually start
      * enumerating */
     for (count = 0; host && count < hostCount; count++) {
-       if (!(host->hostFlags & HOSTDELETED)) {
+       if (!(host->z.hostFlags & HOSTDELETED)) {
            enumstart = host;
            break;
        }
-       host = host->next;
+       host = host->z.next;
     }
     if (!enumstart) {
        /* we didn't find a non-deleted host... */
@@ -1068,11 +1070,11 @@ h_Enumerate_r(int (*proc) (struct host *, void *),
     origHostCount = hostCount;
 
     for (count = 0, host = enumstart; host && count < origHostCount; host = next, count++) {
-       next = host->next;
+       next = host->z.next;
 
        /* find the next non-deleted host */
-       while (next && (next->hostFlags & HOSTDELETED)) {
-           next = next->next;
+       while (next && (next->z.hostFlags & HOSTDELETED)) {
+           next = next->z.next;
            /* inc count for the skipped-over host */
            if (++count > origHostCount) {
                ViceLog(0, ("h_Enumerate_r found more than %d hosts\n", origHostCount));
@@ -1082,7 +1084,7 @@ h_Enumerate_r(int (*proc) (struct host *, void *),
        if (next)
            h_Hold_r(next);
 
-       if (!(host->hostFlags & HOSTDELETED)) {
+       if (!(host->z.hostFlags & HOSTDELETED)) {
            int flags;
            flags = (*proc) (host, param);
            if (H_ENUMERATE_ISSET_BAIL(flags)) {
@@ -1122,16 +1124,16 @@ h_AddHostToUuidHashTable_r(struct afsUUID *uuid, struct host *host)
        if (!chain->hostPtr)
            continue;
 
-       if (chain->hostPtr->interface &&
-           afs_uuid_equal(&chain->hostPtr->interface->uuid, uuid)) {
-           if (LogLevel >= 125) {
-               afsUUID_to_string(&chain->hostPtr->interface->uuid, uuid1,
+       if (chain->hostPtr->z.interface &&
+           afs_uuid_equal(&chain->hostPtr->z.interface->uuid, uuid)) {
+           if (GetLogLevel() >= 125) {
+               afsUUID_to_string(&chain->hostPtr->z.interface->uuid, uuid1,
                                  127);
                afsUUID_to_string(uuid, uuid2, 127);
                ViceLog(125, ("h_AddHostToUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s) exists as %s:%d (uuid %s)\n",
                              host, uuid1,
-                             afs_inet_ntoa_r(chain->hostPtr->host, hoststr),
-                             ntohs(chain->hostPtr->port), uuid2));
+                             afs_inet_ntoa_r(chain->hostPtr->z.host, hoststr),
+                             ntohs(chain->hostPtr->z.port), uuid2));
            }
            return;
        }
@@ -1145,13 +1147,13 @@ h_AddHostToUuidHashTable_r(struct afsUUID *uuid, struct host *host)
     chain->hostPtr = host;
     chain->next = hostUuidHashTable[index];
     hostUuidHashTable[index] = chain;
-         if (LogLevel < 125)
+         if (GetLogLevel() < 125)
               return;
      afsUUID_to_string(uuid, uuid2, 127);
      ViceLog(125,
             ("h_AddHostToUuidHashTable_r: host %p (%s:%d) added as uuid %s\n",
-             host, afs_inet_ntoa_r(chain->hostPtr->host, hoststr),
-             ntohs(chain->hostPtr->port), uuid2));
+             host, afs_inet_ntoa_r(chain->hostPtr->z.host, hoststr),
+             ntohs(chain->hostPtr->z.port), uuid2));
 }
 
 /* deletes a HashChain structure corresponding to this host */
@@ -1163,21 +1165,21 @@ h_DeleteHostFromUuidHashTable_r(struct host *host)
      char uuid1[128];
      char hoststr[16];
 
-     if (!host->interface)
+     if (!host->z.interface)
        return 0;
 
      /* hash into proper bucket */
-     index = h_UuidHashIndex(&host->interface->uuid);
+     index = h_UuidHashIndex(&host->z.interface->uuid);
 
-     if (LogLevel >= 125)
-        afsUUID_to_string(&host->interface->uuid, uuid1, 127);
+     if (GetLogLevel() >= 125)
+        afsUUID_to_string(&host->z.interface->uuid, uuid1, 127);
      for (uhp = &hostUuidHashTable[index]; (uth = *uhp); uhp = &uth->next) {
          opr_Assert(uth->hostPtr);
         if (uth->hostPtr == host) {
             ViceLog(125,
                     ("h_DeleteHostFromUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s %s:%d)\n",
-                     host, uuid1, afs_inet_ntoa_r(host->host, hoststr),
-                     ntohs(host->port)));
+                     host, uuid1, afs_inet_ntoa_r(host->z.host, hoststr),
+                     ntohs(host->z.port)));
             *uhp = uth->next;
             free(uth);
             return 1;
@@ -1185,8 +1187,8 @@ h_DeleteHostFromUuidHashTable_r(struct host *host)
      }
      ViceLog(125,
             ("h_DeleteHostFromUuidHashTable_r: host %" AFS_PTR_FMT " (uuid %s %s:%d) not found\n",
-             host, uuid1, afs_inet_ntoa_r(host->host, hoststr),
-             ntohs(host->port)));
+             host, uuid1, afs_inet_ntoa_r(host->z.host, hoststr),
+             ntohs(host->z.port)));
      return 0;
 }
 
@@ -1204,19 +1206,19 @@ invalidateInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
     char hoststr[16], hoststr2[16];
 
     opr_Assert(host);
-    opr_Assert(host->interface);
+    opr_Assert(host->z.interface);
 
     ViceLog(125, ("invalidateInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) addr %s:%d\n",
-                 host, afs_inet_ntoa_r(host->host, hoststr),
-                 ntohs(host->port), afs_inet_ntoa_r(addr, hoststr2),
+                 host, afs_inet_ntoa_r(host->z.host, hoststr),
+                 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
                  ntohs(port)));
 
     /*
      * Make sure this address is on the list of known addresses
      * for this host.
      */
-    interface = host->interface;
-    number = host->interface->numberOfInterfaces;
+    interface = host->z.interface;
+    number = host->z.interface->numberOfInterfaces;
     for (i = 0; i < number; i++) {
        if (interface->interface[i].addr == addr &&
            interface->interface[i].port == port) {
@@ -1248,12 +1250,12 @@ removeAddress_r(struct host *host, afs_uint32 addr, afs_uint16 port)
     char hoststr[16], hoststr2[16];
     struct rx_connection *rxconn;
 
-    if (!host->interface || host->interface->numberOfInterfaces == 1) {
-        if (host->host == addr && host->port == port) {
-            ViceLog(25,
-                    ("Removing only address for host %" AFS_PTR_FMT " (%s:%d), deleting host.\n",
-                     host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
-            host->hostFlags |= HOSTDELETED;
+    if (!host->z.interface || host->z.interface->numberOfInterfaces == 1) {
+       if (host->z.host == addr && host->z.port == port) {
+           ViceLog(25,
+                   ("Removing only address for host %" AFS_PTR_FMT " (%s:%d), deleting host.\n",
+                    host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
+           host->z.hostFlags |= HOSTDELETED;
             /*
              * Do not remove the primary addr/port from the hash table.
              * It will be ignored due to the HOSTDELETED flag and will
@@ -1262,39 +1264,39 @@ removeAddress_r(struct host *host, afs_uint32 addr, afs_uint16 port)
              * the host/addr/port in the hash chain which will fail.
              */
         } else {
-            ViceLog(0,
-                    ("Removing address that does not belong to host %" AFS_PTR_FMT " (%s:%d).\n",
-                     host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
+           ViceLog(0,
+                   ("Removing address that does not belong to host %" AFS_PTR_FMT " (%s:%d).\n",
+                    host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
         }
     } else {
-        if (host->host == addr && host->port == port)  {
+       if (host->z.host == addr && host->z.port == port)  {
             removeInterfaceAddr_r(host, addr, port);
 
-            for (i=0; i < host->interface->numberOfInterfaces; i++) {
-                if (host->interface->interface[i].valid) {
-                    ViceLog(25,
-                             ("Removed address for host %" AFS_PTR_FMT " (%s:%d), new primary interface %s:%d.\n",
-                               host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port),
-                               afs_inet_ntoa_r(host->interface->interface[i].addr, hoststr2),
-                               ntohs(host->interface->interface[i].port)));
-                    host->host = host->interface->interface[i].addr;
-                    host->port = host->interface->interface[i].port;
-                    h_AddHostToAddrHashTable_r(host->host, host->port, host);
+           for (i=0; i < host->z.interface->numberOfInterfaces; i++) {
+               if (host->z.interface->interface[i].valid) {
+                   ViceLog(25,
+                            ("Removed address for host %" AFS_PTR_FMT " (%s:%d), new primary interface %s:%d.\n",
+                              host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
+                              afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr2),
+                              ntohs(host->z.interface->interface[i].port)));
+                   host->z.host = host->z.interface->interface[i].addr;
+                   host->z.port = host->z.interface->interface[i].port;
+                   h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
                     break;
                 }
             }
 
-            if (i == host->interface->numberOfInterfaces) {
+           if (i == host->z.interface->numberOfInterfaces) {
                 ViceLog(25,
                          ("Removed only address for host %" AFS_PTR_FMT " (%s:%d), no valid alternate interfaces, deleting host.\n",
-                           host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
-                host->hostFlags |= HOSTDELETED;
+                          host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
+               host->z.hostFlags |= HOSTDELETED;
                 /* addr/port was removed from the hash table */
-                host->host = 0;
-                host->port = 0;
+               host->z.host = 0;
+               host->z.port = 0;
             } else {
-                rxconn = host->callback_rxcon;
-                host->callback_rxcon = NULL;
+               rxconn = host->z.callback_rxcon;
+               host->z.callback_rxcon = NULL;
 
                 if (rxconn) {
                     rx_DestroyConnection(rxconn);
@@ -1354,7 +1356,7 @@ reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
 
     ViceLog(125,
            ("reconcileHosts_r: addr %s:%d newHost %" AFS_PTR_FMT " oldHost %"
-            AFS_PTR_FMT, afs_inet_ntoa_r(addr, hoststr), ntohs(port),
+            AFS_PTR_FMT "\n", afs_inet_ntoa_r(addr, hoststr), ntohs(port),
             newHost, oldHost));
 
     opr_Assert(oldHost != newHost);
@@ -1392,8 +1394,8 @@ reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
     }
 
     /* Since lock was dropped, the hosts may have been deleted during the rpcs. */
-    if ((newHost->hostFlags & HOSTDELETED)
-       && (oldHost->hostFlags & HOSTDELETED)) {
+    if ((newHost->z.hostFlags & HOSTDELETED)
+       && (oldHost->z.hostFlags & HOSTDELETED)) {
        ViceLog(5,
                ("reconcileHosts_r: new and old hosts were deleted during probe.\n"));
        goto done;
@@ -1401,11 +1403,11 @@ reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
 
     /* A check can be done if at least one of the hosts has a uuid. It
      * is an error if the hosts have the same (not null) uuid. */
-    if ((!(newHost->hostFlags & HOSTDELETED)) && newHost->interface) {
-       newHostUuid = &(newHost->interface->uuid);
+    if ((!(newHost->z.hostFlags & HOSTDELETED)) && newHost->z.interface) {
+       newHostUuid = &(newHost->z.interface->uuid);
     }
-    if ((!(oldHost->hostFlags & HOSTDELETED)) && oldHost->interface) {
-       oldHostUuid = &(oldHost->interface->uuid);
+    if ((!(oldHost->z.hostFlags & HOSTDELETED)) && oldHost->z.interface) {
+       oldHostUuid = &(oldHost->z.interface->uuid);
     }
     if (afs_uuid_equal(newHostUuid, &nulluuid) &&
        afs_uuid_equal(oldHostUuid, &nulluuid)) {
@@ -1422,7 +1424,7 @@ reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
     }
 
     /* Determine which host should be hashed */
-    if ((!(newHost->hostFlags & HOSTDELETED))
+    if ((!(newHost->z.hostFlags & HOSTDELETED))
        && afs_uuid_equal(newHostUuid, &(interf.uuid))) {
        /* Install the new host into the hash before removing the stale
         * addresses. Walk the hash chain again since the hash table may have
@@ -1440,17 +1442,17 @@ reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
        removeAddress_r(oldHost, addr, port);
        goto done;
     }
-    if ((!(oldHost->hostFlags & HOSTDELETED))
+    if ((!(oldHost->z.hostFlags & HOSTDELETED))
        && afs_uuid_equal(oldHostUuid, &(interf.uuid))) {
        removeAddress_r(newHost, addr, port);
        goto done;
     }
 
   fail:
-    if (!(newHost->hostFlags & HOSTDELETED)) {
+    if (!(newHost->z.hostFlags & HOSTDELETED)) {
        removeAddress_r(newHost, addr, port);
     }
-    if (!(oldHost->hostFlags & HOSTDELETED)) {
+    if (!(oldHost->z.hostFlags & HOSTDELETED)) {
        removeAddress_r(oldHost, addr, port);
     }
 
@@ -1482,7 +1484,7 @@ h_AddHostToAddrHashTable_r(afs_uint32 addr, afs_uint16 port, struct host *host)
                          ntohs(chain->port)));
                return;
            }
-           if (!(chain->hostPtr->hostFlags & HOSTDELETED)) {
+           if (!(chain->hostPtr->z.hostFlags & HOSTDELETED)) {
                /* attempt to resolve host address collision */
                reconcileHosts_r(addr, port, host, chain->hostPtr);
                return;
@@ -1508,25 +1510,25 @@ addInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
     char hoststr[16], hoststr2[16];
 
     opr_Assert(host);
-    opr_Assert(host->interface);
+    opr_Assert(host->z.interface);
 
     /*
      * Make sure this address is on the list of known addresses
      * for this host.
      */
-    number = host->interface->numberOfInterfaces;
+    number = host->z.interface->numberOfInterfaces;
     for (i = 0; i < number; i++) {
-       if (host->interface->interface[i].addr == addr &&
-             host->interface->interface[i].port == port) {
+       if (host->z.interface->interface[i].addr == addr &&
+            host->z.interface->interface[i].port == port) {
            ViceLog(125,
                    ("addInterfaceAddr : found host %" AFS_PTR_FMT " (%s:%d) adding %s:%d%s\n",
-                    host, afs_inet_ntoa_r(host->host, hoststr),
-                    ntohs(host->port), afs_inet_ntoa_r(addr, hoststr2),
-                    ntohs(port), host->interface->interface[i].valid ? "" :
+                    host, afs_inet_ntoa_r(host->z.host, hoststr),
+                    ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
+                    ntohs(port), host->z.interface->interface[i].valid ? "" :
                     ", validating"));
 
-           if (host->interface->interface[i].valid == 0) {
-               host->interface->interface[i].valid = 1;
+           if (host->z.interface->interface[i].valid == 0) {
+               host->z.interface->interface[i].valid = 1;
                h_AddHostToAddrHashTable_r(addr, port, host);
            }
            return 0;
@@ -1534,8 +1536,8 @@ addInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
     }
 
     ViceLog(125, ("addInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) adding %s:%d\n",
-                 host, afs_inet_ntoa_r(host->host, hoststr),
-                 ntohs(host->port), afs_inet_ntoa_r(addr, hoststr2),
+                 host, afs_inet_ntoa_r(host->z.host, hoststr),
+                 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
                  ntohs(port)));
 
     interface = malloc(sizeof(struct Interface)
@@ -1544,17 +1546,17 @@ addInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
        ViceLogThenPanic(0, ("Failed malloc in addInterfaceAddr_r\n"));
     }
     interface->numberOfInterfaces = number + 1;
-    interface->uuid = host->interface->uuid;
+    interface->uuid = host->z.interface->uuid;
     for (i = 0; i < number; i++)
-       interface->interface[i] = host->interface->interface[i];
+       interface->interface[i] = host->z.interface->interface[i];
 
     /* Add the new valid interface */
     interface->interface[number].addr = addr;
     interface->interface[number].port = port;
     interface->interface[number].valid = 1;
     h_AddHostToAddrHashTable_r(addr, port, host);
-    free(host->interface);
-    host->interface = interface;
+    free(host->z.interface);
+    host->z.interface = interface;
 
     return 0;
 }
@@ -1574,19 +1576,19 @@ removeInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
     char hoststr[16], hoststr2[16];
 
     opr_Assert(host);
-    opr_Assert(host->interface);
+    opr_Assert(host->z.interface);
 
     ViceLog(125, ("removeInterfaceAddr : host %" AFS_PTR_FMT " (%s:%d) addr %s:%d\n",
-                 host, afs_inet_ntoa_r(host->host, hoststr),
-                 ntohs(host->port), afs_inet_ntoa_r(addr, hoststr2),
+                 host, afs_inet_ntoa_r(host->z.host, hoststr),
+                 ntohs(host->z.port), afs_inet_ntoa_r(addr, hoststr2),
                  ntohs(port)));
 
     /*
      * Make sure this address is on the list of known addresses
      * for this host.
      */
-    interface = host->interface;
-    number = host->interface->numberOfInterfaces;
+    interface = host->z.interface;
+    number = host->z.interface->numberOfInterfaces;
     for (i = 0; i < number; i++) {
        if (interface->interface[i].addr == addr &&
            interface->interface[i].port == port) {
@@ -1650,7 +1652,7 @@ removeInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
  * on cached TMAY results?
  *
  * @param[in] host  The host we are dealing with
- * @param[in] prewait_tmays  What the value of host->n_tmays was _before_ we
+ * @param[in] prewait_tmays  What the value of host->z.n_tmays was _before_ we
  *                           locked 'host'
  * @param[in] prewait_host   What the primary IP address for 'host' was before
  *                           we locked 'host'
@@ -1665,14 +1667,14 @@ ShouldSkipTMAY(struct host *host, int prewait_tmays, afs_uint32 prewait_host,
                afs_uint16 prewait_port)
 {
     int skiptmay = 0;
-    if (host->n_tmays > prewait_tmays + 1) {
+    if (host->z.n_tmays > prewait_tmays + 1) {
        /* while we were waiting for the host lock, the in-progress TMAY
         * call finished, someone else started a new TMAY call, and that
         * finished. so, calling TMAY again won't give us any information
         * or additional guarantees. */
        skiptmay = 1;
     }
-    if (host->host != prewait_host || host->port != prewait_port) {
+    if (host->z.host != prewait_host || host->z.port != prewait_port) {
        /* ...but don't skip it if the host has changed */
        skiptmay = 0;
     }
@@ -1706,17 +1708,17 @@ SimulateTMAY(struct host *host, int *askiptmay, struct interfaceAddr *interf,
        return -1;
     }
 
-    *interf = host->tmay_interf;
+    *interf = host->z.tmay_interf;
 
     free(caps->Capabilities_val);
     caps->Capabilities_val = NULL;
     caps->Capabilities_len = 0;
 
-    if (!host->tmay_caps.Capabilities_val) {
+    if (!host->z.tmay_caps.Capabilities_val) {
        return 0;
     }
 
-    capsize = sizeof(caps->Capabilities_val[0]) * host->tmay_caps.Capabilities_len;
+    capsize = sizeof(caps->Capabilities_val[0]) * host->z.tmay_caps.Capabilities_len;
 
     caps->Capabilities_val = malloc(capsize);
     if (!caps->Capabilities_val) {
@@ -1725,8 +1727,8 @@ SimulateTMAY(struct host *host, int *askiptmay, struct interfaceAddr *interf,
        *askiptmay = 0;
        return -1;
     }
-    caps->Capabilities_len = host->tmay_caps.Capabilities_len;
-    memcpy(caps->Capabilities_val, host->tmay_caps.Capabilities_val, capsize);
+    caps->Capabilities_len = host->z.tmay_caps.Capabilities_len;
+    memcpy(caps->Capabilities_val, host->z.tmay_caps.Capabilities_val, capsize);
 
     return 0;
 }
@@ -1758,7 +1760,7 @@ CacheTMAY(struct host *host, int skiptmay, int didtmay,
         * stale results */
        goto resetcache;
     }
-    if (host->n_tmays == INT_MAX) {
+    if (host->z.n_tmays == INT_MAX) {
        /* make sure int rollover doesn't screw up our ordering */
        goto resetcache;
     }
@@ -1770,43 +1772,43 @@ CacheTMAY(struct host *host, int skiptmay, int didtmay,
     /* okay, if we got here, everything looks good; let's cache the given
      * 'interf' and 'caps' */
 
-    host->tmay_interf = *interf;
+    host->z.tmay_interf = *interf;
 
     if (!caps->Capabilities_val) {
-       free(host->tmay_caps.Capabilities_val);
-       host->tmay_caps.Capabilities_val = NULL;
-       host->tmay_caps.Capabilities_len = 0;
+       free(host->z.tmay_caps.Capabilities_val);
+       host->z.tmay_caps.Capabilities_val = NULL;
+       host->z.tmay_caps.Capabilities_len = 0;
 
     } else {
-       if (caps->Capabilities_len != host->tmay_caps.Capabilities_len) {
-           free(host->tmay_caps.Capabilities_val);
-           host->tmay_caps.Capabilities_val = NULL;
-           host->tmay_caps.Capabilities_len = 0;
+       if (caps->Capabilities_len != host->z.tmay_caps.Capabilities_len) {
+           free(host->z.tmay_caps.Capabilities_val);
+           host->z.tmay_caps.Capabilities_val = NULL;
+           host->z.tmay_caps.Capabilities_len = 0;
        }
 
        capsize = sizeof(caps->Capabilities_val[0]) * caps->Capabilities_len;
 
-       if (!host->tmay_caps.Capabilities_val) {
-           host->tmay_caps.Capabilities_val = malloc(capsize);
-           if (!host->tmay_caps.Capabilities_val) {
+       if (!host->z.tmay_caps.Capabilities_val) {
+           host->z.tmay_caps.Capabilities_val = malloc(capsize);
+           if (!host->z.tmay_caps.Capabilities_val) {
                goto resetcache;
            }
        }
 
-       host->tmay_caps.Capabilities_len = caps->Capabilities_len;
-       memcpy(host->tmay_caps.Capabilities_val, caps->Capabilities_val, capsize);
+       host->z.tmay_caps.Capabilities_len = caps->Capabilities_len;
+       memcpy(host->z.tmay_caps.Capabilities_val, caps->Capabilities_val, capsize);
     }
-    host->n_tmays++;
+    host->z.n_tmays++;
     return;
 
  resetcache:
     /* blow away the cached TMAY data; pretend we never saw anything */
-    free(host->tmay_caps.Capabilities_val);
-    host->tmay_caps.Capabilities_val = NULL;
-    host->tmay_caps.Capabilities_len = 0;
-    memset(&host->tmay_interf, 0, sizeof(host->tmay_interf));
+    free(host->z.tmay_caps.Capabilities_val);
+    host->z.tmay_caps.Capabilities_val = NULL;
+    host->z.tmay_caps.Capabilities_len = 0;
+    memset(&host->z.tmay_interf, 0, sizeof(host->z.tmay_interf));
 
-    host->n_tmays = 0;
+    host->z.n_tmays = 0;
 }
 
 static int
@@ -1853,45 +1855,45 @@ h_GetHost_r(struct rx_connection *tcon)
     if (h_Lookup_r(haddr, hport, &host))
        return 0;
     identP = (struct Identity *)rx_GetSpecific(tcon, rxcon_ident_key);
-    if (host && !identP && !(host->Console & 1)) {
+    if (host && !identP && !(host->z.Console & 1)) {
        /* This is a new connection, and we already have a host
         * structure for this address. Verify that the identity
         * of the caller matches the identity in the host structure.
         */
 
-       int didtmay = 0; /* did we make a successful TMAY call against host->host? */
+       int didtmay = 0; /* did we make a successful TMAY call against host->z.host? */
        unsigned int prewait_tmays;
        afs_uint32 prewait_host;
        afs_uint16 prewait_port;
        int skiptmay;
 
-       if ((host->hostFlags & HWHO_INPROGRESS) &&
+       if ((host->z.hostFlags & HWHO_INPROGRESS) &&
            h_threadquota(host->lock.num_waiting)) {
                h_Release_r(host);
            host = NULL;
            goto gethost_out;
        }
 
-       prewait_tmays = host->n_tmays;
-       prewait_host = host->host;
-       prewait_port = host->port;
+       prewait_tmays = host->z.n_tmays;
+       prewait_host = host->z.host;
+       prewait_port = host->z.port;
 
        h_Lock_r(host);
-       if (!(host->hostFlags & ALTADDR) ||
-            (host->hostFlags & HOSTDELETED)) {
+       if (!(host->z.hostFlags & ALTADDR) ||
+           (host->z.hostFlags & HOSTDELETED)) {
            /* Another thread is doing initialization
              * or this host was deleted while we
              * waited for the lock. */
            h_Unlock_r(host);
            ViceLog(125,
                    ("Host %" AFS_PTR_FMT " (%s:%d) starting h_Lookup again\n",
-                    host, afs_inet_ntoa_r(host->host, hoststr),
-                    ntohs(host->port)));
+                    host, afs_inet_ntoa_r(host->z.host, hoststr),
+                    ntohs(host->z.port)));
            h_Release_r(host);
            goto retry;
        }
-       host->hostFlags |= HWHO_INPROGRESS;
-       host->hostFlags &= ~ALTADDR;
+       host->z.hostFlags |= HWHO_INPROGRESS;
+       host->z.hostFlags &= ~ALTADDR;
 
         /* We received a new connection from an IP address/port
          * that is associated with 'host' but the address/port of
@@ -1904,13 +1906,13 @@ h_GetHost_r(struct rx_connection *tcon)
          * is still valid.
          */
 
-       cb_conn = host->callback_rxcon;
+       cb_conn = host->z.callback_rxcon;
        rx_GetConnection(cb_conn);
 
        skiptmay = ShouldSkipTMAY(host, prewait_tmays, prewait_host, prewait_port);
 
        H_UNLOCK;
-        if (haddr == host->host && hport == host->port) {
+       if (haddr == host->z.host && hport == host->z.port) {
             /* The existing callback connection matches the
              * incoming connection so just use it.
              */
@@ -1964,14 +1966,14 @@ h_GetHost_r(struct rx_connection *tcon)
                 * the WhoAreYou. We will treat this as a new connection
                 * from the existing host. The worst that can happen is
                 * that we maintain some extra callback state information */
-               if (host->interface) {
+               if (host->z.interface) {
                    ViceLog(0,
                            ("Host %" AFS_PTR_FMT " (%s:%d) used to support WhoAreYou, deleting.\n",
                             host,
-                            afs_inet_ntoa_r(host->host, hoststr),
-                            ntohs(host->port)));
-                   host->hostFlags |= HOSTDELETED;
-                   host->hostFlags &= ~HWHO_INPROGRESS;
+                            afs_inet_ntoa_r(host->z.host, hoststr),
+                            ntohs(host->z.port)));
+                   host->z.hostFlags |= HOSTDELETED;
+                   host->z.hostFlags &= ~HWHO_INPROGRESS;
                    h_Unlock_r(host);
                    h_Release_r(host);
                    host = NULL;
@@ -1985,8 +1987,8 @@ h_GetHost_r(struct rx_connection *tcon)
                  * will be deleted.  Then we retry.
                  */
                 removeAddress_r(host, haddr, hport);
-                host->hostFlags &= ~HWHO_INPROGRESS;
-                host->hostFlags |= ALTADDR;
+               host->z.hostFlags &= ~HWHO_INPROGRESS;
+               host->z.hostFlags |= ALTADDR;
                 h_Unlock_r(host);
                h_Release_r(host);
                 host = NULL;
@@ -2004,8 +2006,8 @@ h_GetHost_r(struct rx_connection *tcon)
            /* Check whether the UUID on this connection matches
             * the UUID in the host structure. If they don't match
             * then this is not the same host as before. */
-           if (!host->interface
-               || !afs_uuid_equal(&interf.uuid, &host->interface->uuid)) {
+           if (!host->z.interface
+               || !afs_uuid_equal(&interf.uuid, &host->z.interface->uuid)) {
                if (cb_in) {
                        ViceLog(25,
                                        ("Uuid doesn't match connection (%s:%d).\n",
@@ -2014,12 +2016,12 @@ h_GetHost_r(struct rx_connection *tcon)
                } else {
                    ViceLog(25,
                            ("Uuid doesn't match host %" AFS_PTR_FMT " (%s:%d).\n",
-                            host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
+                            host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
 
-                   removeAddress_r(host, host->host, host->port);
+                   removeAddress_r(host, host->z.host, host->z.port);
                }
-               host->hostFlags &= ~HWHO_INPROGRESS;
-                host->hostFlags |= ALTADDR;
+               host->z.hostFlags &= ~HWHO_INPROGRESS;
+               host->z.hostFlags |= ALTADDR;
                h_Unlock_r(host);
                h_Release_r(host);
                host = NULL;
@@ -2031,8 +2033,8 @@ h_GetHost_r(struct rx_connection *tcon)
                  * is still there and if the reported UUID is the same.
                  */
                 int code2;
-                afsUUID uuid = host->interface->uuid;
-                cb_conn = host->callback_rxcon;
+               afsUUID uuid = host->z.interface->uuid;
+               cb_conn = host->z.callback_rxcon;
                 rx_GetConnection(cb_conn);
                 rx_SetConnDeadTime(cb_conn, 2);
                 rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
@@ -2052,8 +2054,8 @@ h_GetHost_r(struct rx_connection *tcon)
                     struct rx_connection *rxconn;
                     ViceLog(0,("CB: ProbeUuid for host %" AFS_PTR_FMT " (%s:%d) failed %d\n",
                               host,
-                              afs_inet_ntoa_r(host->host, hoststr),
-                              ntohs(host->port),code2));
+                              afs_inet_ntoa_r(host->z.host, hoststr),
+                              ntohs(host->z.port),code2));
 
                     /*
                      * make sure we add and then remove.  otherwise, we
@@ -2061,11 +2063,11 @@ h_GetHost_r(struct rx_connection *tcon)
                      * remove and the host will have been marked deleted.
                      */
                     addInterfaceAddr_r(host, haddr, hport);
-                    removeInterfaceAddr_r(host, host->host, host->port);
-                    host->host = haddr;
-                    host->port = hport;
-                    rxconn = host->callback_rxcon;
-                    host->callback_rxcon = cb_in;
+                   removeInterfaceAddr_r(host, host->z.host, host->z.port);
+                   host->z.host = haddr;
+                   host->z.port = hport;
+                   rxconn = host->z.callback_rxcon;
+                   host->z.callback_rxcon = cb_in;
                     cb_in = NULL;
 
                     if (rxconn) {
@@ -2086,12 +2088,12 @@ h_GetHost_r(struct rx_connection *tcon)
                  * Assume that the addr/port is no longer associated with the host
                  * returned by h_Lookup_r.
                  */
-                ViceLog(0,
+               ViceLog(0,
                        ("CB: WhoAreYou failed for connection (%s:%d) , error %d\n",
                         afs_inet_ntoa_r(haddr, hoststr), ntohs(hport), code));
-                removeAddress_r(host, haddr, hport);
-                host->hostFlags &= ~HWHO_INPROGRESS;
-                host->hostFlags |= ALTADDR;
+               removeAddress_r(host, haddr, hport);
+               host->z.hostFlags &= ~HWHO_INPROGRESS;
+               host->z.hostFlags |= ALTADDR;
                 h_Unlock_r(host);
                h_Release_r(host);
                 host = NULL;
@@ -2101,60 +2103,60 @@ h_GetHost_r(struct rx_connection *tcon)
            } else {
                ViceLog(0,
                        ("CB: WhoAreYou failed for host %" AFS_PTR_FMT " (%s:%d), error %d\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr),
-                        ntohs(host->port), code));
-               host->hostFlags |= VENUSDOWN;
+                        host, afs_inet_ntoa_r(host->z.host, hoststr),
+                        ntohs(host->z.port), code));
+               host->z.hostFlags |= VENUSDOWN;
            }
        }
        if (caps.Capabilities_val
            && (caps.Capabilities_val[0] & CLIENT_CAPABILITY_ERRORTRANS))
-           host->hostFlags |= HERRORTRANS;
+           host->z.hostFlags |= HERRORTRANS;
        else
-           host->hostFlags &= ~(HERRORTRANS);
-       host->hostFlags |= ALTADDR;
-       host->hostFlags &= ~HWHO_INPROGRESS;
+           host->z.hostFlags &= ~(HERRORTRANS);
+       host->z.hostFlags |= ALTADDR;
+       host->z.hostFlags &= ~HWHO_INPROGRESS;
        h_Unlock_r(host);
     } else if (host) {
-       if (!(host->hostFlags & ALTADDR)) {
+       if (!(host->z.hostFlags & ALTADDR)) {
            /* another thread is doing the initialisation */
            ViceLog(125,
                    ("Host %" AFS_PTR_FMT " (%s:%d) waiting for host-init to complete\n",
-                    host, afs_inet_ntoa_r(host->host, hoststr),
-                    ntohs(host->port)));
+                    host, afs_inet_ntoa_r(host->z.host, hoststr),
+                    ntohs(host->z.port)));
            h_Lock_r(host);
            h_Unlock_r(host);
            ViceLog(125,
                    ("Host %" AFS_PTR_FMT " (%s:%d) starting h_Lookup again\n",
-                    host, afs_inet_ntoa_r(host->host, hoststr),
-                    ntohs(host->port)));
+                    host, afs_inet_ntoa_r(host->z.host, hoststr),
+                    ntohs(host->z.port)));
            h_Release_r(host);
            goto retry;
        }
        /* We need to check whether the identity in the host structure
         * matches the identity on the connection. If they don't match
         * then treat this a new host. */
-       if (!(host->Console & 1)
-           && ((!identP->valid && host->interface)
-               || (identP->valid && !host->interface)
+       if (!(host->z.Console & 1)
+           && ((!identP->valid && host->z.interface)
+               || (identP->valid && !host->z.interface)
                || (identP->valid
                    && !afs_uuid_equal(&identP->uuid,
-                                      &host->interface->uuid)))) {
+                                      &host->z.interface->uuid)))) {
            char uuid1[128], uuid2[128];
            if (identP->valid)
                afsUUID_to_string(&identP->uuid, uuid1, 127);
-           if (host->interface)
-               afsUUID_to_string(&host->interface->uuid, uuid2, 127);
+           if (host->z.interface)
+               afsUUID_to_string(&host->z.interface->uuid, uuid2, 127);
            ViceLog(0,
                    ("CB: new identity for host %p (%s:%d), "
                     "deleting(%x %p %s %s)\n",
-                    host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port),
-                    identP->valid, host->interface,
+                    host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
+                    identP->valid, host->z.interface,
                     identP->valid ? uuid1 : "no_uuid",
-                    host->interface ? uuid2 : "no_uuid"));
+                    host->z.interface ? uuid2 : "no_uuid"));
 
            /* The host in the cache is not the host for this connection */
             h_Lock_r(host);
-           host->hostFlags |= HOSTDELETED;
+           host->z.hostFlags |= HOSTDELETED;
            h_Unlock_r(host);
            h_Release_r(host);
            goto retry;
@@ -2164,11 +2166,11 @@ h_GetHost_r(struct rx_connection *tcon)
        if (!host)
            goto gethost_out;
        h_gethostcps_r(host, time(NULL));
-       if (!(host->Console & 1)) {
+       if (!(host->z.Console & 1)) {
            int pident = 0;
-           cb_conn = host->callback_rxcon;
+           cb_conn = host->z.callback_rxcon;
            rx_GetConnection(cb_conn);
-           host->hostFlags |= HWHO_INPROGRESS;
+           host->z.hostFlags |= HWHO_INPROGRESS;
            H_UNLOCK;
            code =
                RXAFSCB_TellMeAboutYourself(cb_conn, &interf, &caps);
@@ -2192,8 +2194,8 @@ h_GetHost_r(struct rx_connection *tcon)
                    rx_SetSpecific(tcon, rxcon_ident_key, identP);
                ViceLog(25,
                        ("Host %" AFS_PTR_FMT " (%s:%d) does not support WhoAreYou.\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr),
-                        ntohs(host->port)));
+                        host, afs_inet_ntoa_r(host->z.host, hoststr),
+                        ntohs(host->z.port)));
                code = 0;
            } else if (code == 0) {
                if (!identP)
@@ -2211,11 +2213,11 @@ h_GetHost_r(struct rx_connection *tcon)
                    rx_SetSpecific(tcon, rxcon_ident_key, identP);
                ViceLog(25,
                        ("WhoAreYou success on host %" AFS_PTR_FMT " (%s:%d)\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr),
-                        ntohs(host->port)));
+                        host, afs_inet_ntoa_r(host->z.host, hoststr),
+                        ntohs(host->z.port)));
            }
            if (code == 0 && !identP->valid) {
-               cb_conn = host->callback_rxcon;
+               cb_conn = host->z.callback_rxcon;
                rx_GetConnection(cb_conn);
                H_UNLOCK;
                code = RXAFSCB_InitCallBackState(cb_conn);
@@ -2228,7 +2230,7 @@ h_GetHost_r(struct rx_connection *tcon)
                    h_Hold_r(oldHost);
                    h_Lock_r(oldHost);
 
-                   if (oldHost->hostFlags & HOSTDELETED) {
+                   if (oldHost->z.hostFlags & HOSTDELETED) {
                        h_Unlock_r(oldHost);
                        h_Release_r(oldHost);
                        oldHost = NULL;
@@ -2247,14 +2249,14 @@ h_GetHost_r(struct rx_connection *tcon)
                     * "oldHost" to the same IP address as "host" currently
                     * has, and we do not want a pseudo-"collision" to be
                     * noticed. */
-                   host->hostFlags |= HOSTDELETED;
+                   host->z.hostFlags |= HOSTDELETED;
 
-                   oldHost->hostFlags |= HWHO_INPROGRESS;
+                   oldHost->z.hostFlags |= HWHO_INPROGRESS;
 
-                    if (oldHost->interface) {
+                   if (oldHost->z.interface) {
                        int code2;
-                       afsUUID uuid = oldHost->interface->uuid;
-                        cb_conn = oldHost->callback_rxcon;
+                       afsUUID uuid = oldHost->z.interface->uuid;
+                       cb_conn = oldHost->z.callback_rxcon;
                         rx_GetConnection(cb_conn);
                        rx_SetConnDeadTime(cb_conn, 2);
                        rx_SetConnHardDeadTime(cb_conn, AFS_HARDDEADTIME);
@@ -2273,8 +2275,8 @@ h_GetHost_r(struct rx_connection *tcon)
                             * Uuid. */
                            ViceLog(0,("CB: ProbeUuid for host %" AFS_PTR_FMT " (%s:%d) failed %d\n",
                                         oldHost,
-                                         afs_inet_ntoa_r(oldHost->host, hoststr),
-                                        ntohs(oldHost->port),code2));
+                                        afs_inet_ntoa_r(oldHost->z.host, hoststr),
+                                        ntohs(oldHost->z.port),code2));
 
                            if (MultiProbeAlternateAddress_r(oldHost)) {
                                /* If MultiProbeAlternateAddress_r succeeded,
@@ -2291,14 +2293,14 @@ h_GetHost_r(struct rx_connection *tcon)
                         probefail = 1;
                     }
 
-                   if (oldHost->host != haddr || oldHost->port != hport) {
+                   if (oldHost->z.host != haddr || oldHost->z.port != hport) {
                        struct rx_connection *rxconn;
 
                        ViceLog(25,
-                                 ("CB: Host %" AFS_PTR_FMT " (%s:%d) has new addr %s:%d\n",
-                                   oldHost,
-                                   afs_inet_ntoa_r(oldHost->host, hoststr2),
-                                   ntohs(oldHost->port),
+                                ("CB: Host %" AFS_PTR_FMT " (%s:%d) has new addr %s:%d\n",
+                                  oldHost,
+                                  afs_inet_ntoa_r(oldHost->z.host, hoststr2),
+                                  ntohs(oldHost->z.port),
                                    afs_inet_ntoa_r(haddr, hoststr),
                                    ntohs(hport)));
                        /*
@@ -2306,7 +2308,7 @@ h_GetHost_r(struct rx_connection *tcon)
                         * deleted if we removed the only valid address.
                         */
                        addInterfaceAddr_r(oldHost, haddr, hport);
-                       if (probefail || oldHost->host == haddr) {
+                       if (probefail || oldHost->z.host == haddr) {
                            /*
                             * The probe failed which means that the old
                             * address is either unreachable or is not the
@@ -2315,11 +2317,11 @@ h_GetHost_r(struct rx_connection *tcon)
                             * changed because that indicates the client
                             * is behind a NAT.
                             */
-                           removeInterfaceAddr_r(oldHost, oldHost->host, oldHost->port);
+                           removeInterfaceAddr_r(oldHost, oldHost->z.host, oldHost->z.port);
                        } else {
                            int i;
-                           struct Interface *interface = oldHost->interface;
-                           int number = oldHost->interface->numberOfInterfaces;
+                           struct Interface *interface = oldHost->z.interface;
+                           int number = oldHost->z.interface->numberOfInterfaces;
                            for (i = 0; i < number; i++) {
                                if (interface->interface[i].addr == haddr &&
                                    interface->interface[i].port != hport) {
@@ -2334,16 +2336,16 @@ h_GetHost_r(struct rx_connection *tcon)
                                }
                            }
                        }
-                       oldHost->host = haddr;
-                       oldHost->port = hport;
-                       rxconn = oldHost->callback_rxcon;
-                       oldHost->callback_rxcon = host->callback_rxcon;
-                       host->callback_rxcon = rxconn;
+                       oldHost->z.host = haddr;
+                       oldHost->z.port = hport;
+                       rxconn = oldHost->z.callback_rxcon;
+                       oldHost->z.callback_rxcon = host->z.callback_rxcon;
+                       host->z.callback_rxcon = rxconn;
 
                         /* don't destroy rxconn here; let h_TossStuff_r
                          * take care of that via h_Release_r below */
                    }
-                   host->hostFlags &= ~HWHO_INPROGRESS;
+                   host->z.hostFlags &= ~HWHO_INPROGRESS;
                    h_Unlock_r(host);
                    /* release host because it was allocated by h_Alloc_r */
                    h_Release_r(host);
@@ -2354,7 +2356,7 @@ h_GetHost_r(struct rx_connection *tcon)
                    opr_Assert(interfValid == 1);
                    initInterfaceAddr_r(host, &interf);
 
-                   cb_conn = host->callback_rxcon;
+                   cb_conn = host->z.callback_rxcon;
                    rx_GetConnection(cb_conn);
                    H_UNLOCK;
                    code =
@@ -2366,30 +2368,30 @@ h_GetHost_r(struct rx_connection *tcon)
                    if (code == 0) {
                        ViceLog(25,
                                ("InitCallBackState3 success on host %" AFS_PTR_FMT " (%s:%d)\n",
-                                host, afs_inet_ntoa_r(host->host, hoststr),
-                                ntohs(host->port)));
+                                host, afs_inet_ntoa_r(host->z.host, hoststr),
+                                ntohs(host->z.port)));
                    }
                }
            }
            if (code) {
                ViceLog(0,
                        ("CB: RCallBackConnectBack failed for %" AFS_PTR_FMT " (%s:%d)\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
-               host->hostFlags |= VENUSDOWN;
+                        host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
+               host->z.hostFlags |= VENUSDOWN;
            } else {
                ViceLog(125,
                        ("CB: RCallBackConnectBack succeeded for %" AFS_PTR_FMT " (%s:%d)\n",
-                        host, afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port)));
-               host->hostFlags |= RESETDONE;
+                        host, afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port)));
+               host->z.hostFlags |= RESETDONE;
            }
        }
        if (caps.Capabilities_val
            && (caps.Capabilities_val[0] & CLIENT_CAPABILITY_ERRORTRANS))
-           host->hostFlags |= HERRORTRANS;
+           host->z.hostFlags |= HERRORTRANS;
        else
-           host->hostFlags &= ~(HERRORTRANS);
-       host->hostFlags |= ALTADDR;     /* host structure initialization complete */
-       host->hostFlags &= ~HWHO_INPROGRESS;
+           host->z.hostFlags &= ~(HERRORTRANS);
+       host->z.hostFlags |= ALTADDR;   /* host structure initialization complete */
+       host->z.hostFlags &= ~HWHO_INPROGRESS;
        h_Unlock_r(host);
     }
 
@@ -2464,10 +2466,10 @@ PerHost_EnumerateClient(struct host *host, void *arock)
     struct client *client;
     int code;
 
-    for (client = host->FirstClient; client; client = client->next) {
-       if (!client->deleted && client->ViceId == args->vid) {
+    for (client = host->z.FirstClient; client; client = client->z.next) {
+       if (!client->z.deleted && client->z.ViceId == args->vid) {
 
-           client->refCount++;
+           client->z.refCount++;
            H_UNLOCK;
 
            code = (*args->proc)(client, args->rock);
@@ -2546,13 +2548,13 @@ getPeerDetails(struct rx_connection *conn,
     ViceLog(5,
            ("FindClient: authenticating connection: authClass=%d\n",
             authClass));
-    if (authClass == 1) {
+    if (authClass == RX_SECIDX_VAB) {
        /* A bcrypt tickets, no longer supported */
        ViceLog(1, ("FindClient: bcrypt ticket, using AnonymousID\n"));
        return 0;
     }
 
-    if (authClass == 2) {
+    if (authClass == RX_SECIDX_KAD) {
        /* an rxkad ticket */
        afs_int32 kvno;
        afs_int32 islocal;
@@ -2602,8 +2604,8 @@ getPeerDetails(struct rx_connection *conn,
  * by one. The caller must call h_ReleaseClient_r when finished with
  * the client.
  *
- * The refCount on client->host is returned incremented.  h_ReleaseClient_r
- * does not decrement the refCount on client->host.
+ * The refCount on client->z.host is returned incremented.  h_ReleaseClient_r
+ * does not decrement the refCount on client->z.host.
  *
  * *a_viceid is set to the user's ViceId, even if we don't return a client
  * struct.
@@ -2623,17 +2625,17 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
     int created = 0;
 
     client = (struct client *)rx_GetSpecific(tcon, rxcon_client_key);
-    if (client && client->sid == rx_GetConnectionId(tcon)
-       && client->VenusEpoch == rx_GetConnectionEpoch(tcon)
-       && !(client->host->hostFlags & HOSTDELETED)
-       && !client->deleted) {
+    if (client && client->z.sid == rx_GetConnectionId(tcon)
+       && client->z.VenusEpoch == rx_GetConnectionEpoch(tcon)
+       && !(client->z.host->z.hostFlags & HOSTDELETED)
+       && !client->z.deleted) {
 
        if (a_viceid) {
-           *a_viceid = client->ViceId;
+           *a_viceid = client->z.ViceId;
        }
-       client->refCount++;
-       h_Hold_r(client->host);
-       if (client->prfail != 2) {
+       client->z.refCount++;
+       h_Hold_r(client->z.host);
+       if (client->z.prfail != 2) {
            /* Could add shared lock on client here */
            /* note that we don't have to lock entry in this path to
             * ensure CPS is initialized, since we don't call rx_SetSpecific
@@ -2667,10 +2669,10 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
 
     retryfirstclient:
        /* First try to find the client structure */
-       for (client = host->FirstClient; client; client = client->next) {
-           if (!client->deleted && (client->sid == rx_GetConnectionId(tcon))
-               && (client->VenusEpoch == rx_GetConnectionEpoch(tcon))) {
-               client->refCount++;
+       for (client = host->z.FirstClient; client; client = client->z.next) {
+           if (!client->z.deleted && (client->z.sid == rx_GetConnectionId(tcon))
+               && (client->z.VenusEpoch == rx_GetConnectionEpoch(tcon))) {
+               client->z.refCount++;
                H_UNLOCK;
                ObtainWriteLock(&client->lock);
                H_LOCK;
@@ -2681,15 +2683,15 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
        /* Still no client structure - get one */
        if (!client) {
            h_Lock_r(host);
-            if (host->hostFlags & HOSTDELETED) {
+           if (host->z.hostFlags & HOSTDELETED) {
                 h_Unlock_r(host);
                 h_Release_r(host);
                 return NULL;
             }
            /* Retry to find the client structure */
-           for (client = host->FirstClient; client; client = client->next) {
-               if (!client->deleted && (client->sid == rx_GetConnectionId(tcon))
-                   && (client->VenusEpoch == rx_GetConnectionEpoch(tcon))) {
+           for (client = host->z.FirstClient; client; client = client->z.next) {
+               if (!client->z.deleted && (client->z.sid == rx_GetConnectionId(tcon))
+                   && (client->z.VenusEpoch == rx_GetConnectionEpoch(tcon))) {
                    h_Unlock_r(host);
                    goto retryfirstclient;
                }
@@ -2697,43 +2699,43 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
            created = 1;
            client = GetCE();
            ObtainWriteLock(&client->lock);
-           client->refCount = 1;
-           client->host = host;
-           client->InSameNetwork = host->InSameNetwork;
-           client->ViceId = viceid;
-           client->expTime = expTime;  /* rx only */
-           client->authClass = authClass;      /* rx only */
-           client->sid = rx_GetConnectionId(tcon);
-           client->VenusEpoch = rx_GetConnectionEpoch(tcon);
-           client->CPS.prlist_val = NULL;
-           client->CPS.prlist_len = 0;
+           client->z.refCount = 1;
+           client->z.host = host;
+           client->z.InSameNetwork = host->z.InSameNetwork;
+           client->z.ViceId = viceid;
+           client->z.expTime = expTime;        /* rx only */
+           client->z.authClass = authClass;    /* rx only */
+           client->z.sid = rx_GetConnectionId(tcon);
+           client->z.VenusEpoch = rx_GetConnectionEpoch(tcon);
+           client->z.CPS.prlist_val = NULL;
+           client->z.CPS.prlist_len = 0;
            h_Unlock_r(host);
        }
     }
-    client->prfail = fail;
+    client->z.prfail = fail;
 
-    if (!(client->CPS.prlist_val) || (viceid != client->ViceId)) {
-       client->CPS.prlist_len = 0;
-       if (client->CPS.prlist_val && (client->ViceId != ANONYMOUSID))
-           free(client->CPS.prlist_val);
-       client->CPS.prlist_val = NULL;
-       client->ViceId = viceid;
-       client->expTime = expTime;
+    if (!(client->z.CPS.prlist_val) || (viceid != client->z.ViceId)) {
+       client->z.CPS.prlist_len = 0;
+       if (client->z.CPS.prlist_val && (client->z.ViceId != ANONYMOUSID))
+           free(client->z.CPS.prlist_val);
+       client->z.CPS.prlist_val = NULL;
+       client->z.ViceId = viceid;
+       client->z.expTime = expTime;
 
        if (viceid == ANONYMOUSID) {
-           client->CPS.prlist_len = AnonCPS.prlist_len;
-           client->CPS.prlist_val = AnonCPS.prlist_val;
+           client->z.CPS.prlist_len = AnonCPS.prlist_len;
+           client->z.CPS.prlist_val = AnonCPS.prlist_val;
        } else {
            H_UNLOCK;
-           code = hpr_GetCPS(viceid, &client->CPS);
+           code = hpr_GetCPS(viceid, &client->z.CPS);
            H_LOCK;
            if (code) {
                char hoststr[16];
                ViceLog(0,
                        ("pr_GetCPS failed(%d) for user %d, host %" AFS_PTR_FMT " (%s:%d)\n",
-                        code, viceid, client->host,
-                         afs_inet_ntoa_r(client->host->host,hoststr),
-                        ntohs(client->host->port)));
+                        code, viceid, client->z.host,
+                        afs_inet_ntoa_r(client->z.host->z.host,hoststr),
+                        ntohs(client->z.host->z.port)));
 
                /* Although ubik_Call (called by pr_GetCPS) traverses thru
                 * all protection servers and reevaluates things if no
@@ -2749,14 +2751,14 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
                 * want to retry and we don't know the whole code list!
                 */
                if (code < 0 || code == UNOQUORUM || code == UNOTSYNC)
-                   client->prfail = 1;
+                   client->z.prfail = 1;
            }
        }
        /* the disabling of system:administrators is so iffy and has so many
         * possible failure modes that we will disable it again */
        /* Turn off System:Administrator for safety
-        * if (AL_IsAMember(SystemId, client->CPS) == 0)
-        * osi_Assert(AL_DisableGroup(SystemId, client->CPS) == 0); */
+        * if (AL_IsAMember(SystemId, client->z.CPS) == 0)
+        * osi_Assert(AL_DisableGroup(SystemId, client->z.CPS) == 0); */
     }
 
     /* Now, tcon may already be set to a rock, since we blocked with no host
@@ -2766,51 +2768,51 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
      */
     oldClient = (struct client *)rx_GetSpecific(tcon, rxcon_client_key);
     if (oldClient && oldClient != client
-       && oldClient->sid == rx_GetConnectionId(tcon)
-       && oldClient->VenusEpoch == rx_GetConnectionEpoch(tcon)
-       && !(oldClient->host->hostFlags & HOSTDELETED)) {
+       && oldClient->z.sid == rx_GetConnectionId(tcon)
+       && oldClient->z.VenusEpoch == rx_GetConnectionEpoch(tcon)
+       && !(oldClient->z.host->z.hostFlags & HOSTDELETED)) {
        char hoststr[16];
-       if (!oldClient->deleted) {
+       if (!oldClient->z.deleted) {
            /* if we didn't create it, it's not ours to put back */
            if (created) {
                ViceLog(0, ("FindClient: stillborn client %p(%x); "
                            "conn %p (host %s:%d) had client %p(%x)\n",
-                           client, client->sid, tcon,
+                           client, client->z.sid, tcon,
                            afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
                            ntohs(rxr_PortOf(tcon)),
-                           oldClient, oldClient->sid));
-               if ((client->ViceId != ANONYMOUSID) && client->CPS.prlist_val)
-                   free(client->CPS.prlist_val);
-               client->CPS.prlist_val = NULL;
-               client->CPS.prlist_len = 0;
+                           oldClient, oldClient->z.sid));
+               if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
+                   free(client->z.CPS.prlist_val);
+               client->z.CPS.prlist_val = NULL;
+               client->z.CPS.prlist_len = 0;
            }
            /* We should perhaps check for 0 here */
-           client->refCount--;
+           client->z.refCount--;
            ReleaseWriteLock(&client->lock);
            if (created) {
                FreeCE(client);
                created = 0;
            }
-           oldClient->refCount++;
+           oldClient->z.refCount++;
 
-           h_Hold_r(oldClient->host);
-           h_Release_r(client->host);
+           h_Hold_r(oldClient->z.host);
+           h_Release_r(client->z.host);
 
            H_UNLOCK;
            ObtainWriteLock(&oldClient->lock);
            H_LOCK;
            client = oldClient;
-           host = oldClient->host;
+           host = oldClient->z.host;
        } else {
            ViceLog(0, ("FindClient: deleted client %p(%x ref %d host %p href "
-                       "%d) already had conn %p (host %s:%d, cid %x), stolen "
-                       "by client %p(%x, ref %d host %p href %d)\n",
-                       oldClient, oldClient->sid, oldClient->refCount,
-                       oldClient->host, oldClient->host->refCount, tcon,
-                       afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
-                       ntohs(rxr_PortOf(tcon)), rx_GetConnectionId(tcon),
-                       client, client->sid, client->refCount,
-                       client->host, client->host->refCount));
+                       "%d) already had conn %p (host %s:%d, cid %x), stolen "
+                       "by client %p(%x, ref %d host %p href %d)\n",
+                       oldClient, oldClient->z.sid, oldClient->z.refCount,
+                       oldClient->z.host, oldClient->z.host->z.refCount, tcon,
+                       afs_inet_ntoa_r(rxr_HostOf(tcon), hoststr),
+                       ntohs(rxr_PortOf(tcon)), rx_GetConnectionId(tcon),
+                       client, client->z.sid, client->z.refCount,
+                       client->z.host, client->z.host->z.refCount));
            /* rx_SetSpecific will be done immediately below */
        }
     }
@@ -2818,26 +2820,26 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
     if (created) {
        h_Lock_r(host);
 
-        if (host->hostFlags & HOSTDELETED) {
+       if (host->z.hostFlags & HOSTDELETED) {
             h_Unlock_r(host);
             h_Release_r(host);
 
             host = NULL;
-            client->host = NULL;
+           client->z.host = NULL;
 
-            if ((client->ViceId != ANONYMOUSID) && client->CPS.prlist_val)
-                free(client->CPS.prlist_val);
-            client->CPS.prlist_val = NULL;
-            client->CPS.prlist_len = 0;
+           if ((client->z.ViceId != ANONYMOUSID) && client->z.CPS.prlist_val)
+               free(client->z.CPS.prlist_val);
+           client->z.CPS.prlist_val = NULL;
+           client->z.CPS.prlist_len = 0;
 
-            client->refCount--;
+           client->z.refCount--;
             ReleaseWriteLock(&client->lock);
             FreeCE(client);
             return NULL;
         }
 
-       client->next = host->FirstClient;
-       host->FirstClient = client;
+       client->z.next = host->z.FirstClient;
+       host->z.FirstClient = client;
        h_Unlock_r(host);
        CurrentConnections++;   /* increment number of connections */
     }
@@ -2851,8 +2853,8 @@ h_FindClient_r(struct rx_connection *tcon, afs_int32 *a_viceid)
 int
 h_ReleaseClient_r(struct client *client)
 {
-    opr_Assert(client->refCount > 0);
-    client->refCount--;
+    opr_Assert(client->z.refCount > 0);
+    client->z.refCount--;
     return 0;
 }
 
@@ -2881,34 +2883,34 @@ GetClient(struct rx_connection *tcon, struct client **cp)
        H_UNLOCK;
        return VBUSY;
     }
-    if (rx_GetConnectionId(tcon) != client->sid
-       || rx_GetConnectionEpoch(tcon) != client->VenusEpoch) {
+    if (rx_GetConnectionId(tcon) != client->z.sid
+       || rx_GetConnectionEpoch(tcon) != client->z.VenusEpoch) {
        ViceLog(0,
                ("GetClient: tcon %p tcon sid %d client sid %d\n",
-                tcon, rx_GetConnectionId(tcon), client->sid));
+                tcon, rx_GetConnectionId(tcon), client->z.sid));
        H_UNLOCK;
        return VBUSY;
     }
-    if (client && client->LastCall > client->expTime && client->expTime) {
+    if (client && client->z.LastCall > client->z.expTime && client->z.expTime) {
        ViceLog(1,
                ("Token for %s at %s:%d expired %d\n", h_UserName(client),
-                afs_inet_ntoa_r(client->host->host, hoststr),
-                ntohs(client->host->port), client->expTime));
+                afs_inet_ntoa_r(client->z.host->z.host, hoststr),
+                ntohs(client->z.host->z.port), client->z.expTime));
        H_UNLOCK;
        return VICETOKENDEAD;
     }
-    if (client->deleted) {
+    if (client->z.deleted) {
        ViceLog(0, ("GetClient: got deleted client, connection will appear "
-                   "anonymous; tcon %p cid %x client %p ref %d host %p "
-                   "(%s:%d) href %d ViceId %d\n",
-                   tcon, rx_GetConnectionId(tcon), client, client->refCount,
-                   client->host,
-                   afs_inet_ntoa_r(client->host->host, hoststr),
-                   (int)ntohs(client->host->port), client->host->refCount,
-                   (int)client->ViceId));
+                   "anonymous; tcon %p cid %x client %p ref %d host %p "
+                   "(%s:%d) href %d ViceId %d\n",
+                   tcon, rx_GetConnectionId(tcon), client, client->z.refCount,
+                   client->z.host,
+                   afs_inet_ntoa_r(client->z.host->z.host, hoststr),
+                   (int)ntohs(client->z.host->z.port), client->z.host->z.refCount,
+                   (int)client->z.ViceId));
     }
 
-    client->refCount++;
+    client->z.refCount++;
     *cp = client;
     H_UNLOCK;
     return 0;
@@ -2943,7 +2945,7 @@ h_UserName(struct client *client)
     }
     lnames.namelist_len = 0;
     lnames.namelist_val = (prname *) 0;
-    lids.idlist_val[0] = client->ViceId;
+    lids.idlist_val[0] = client->z.ViceId;
     if (hpr_IdToName(&lids, &lnames)) {
        /* We need to free id we alloced above! */
        free(lids.idlist_val);
@@ -2979,37 +2981,37 @@ h_PrintClient(struct host *host, void *rock)
     struct tm tm;
 
     H_LOCK;
-    LastCall = host->LastCall;
-    if (host->hostFlags & HOSTDELETED) {
+    LastCall = host->z.LastCall;
+    if (host->z.hostFlags & HOSTDELETED) {
        H_UNLOCK;
        return 0;
     }
     strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
             localtime_r(&LastCall, &tm));
     snprintf(tmpStr, sizeof tmpStr, "Host %s:%d down = %d, LastCall %s\n",
-            afs_inet_ntoa_r(host->host, hoststr),
-            ntohs(host->port), (host->hostFlags & VENUSDOWN),
+            afs_inet_ntoa_r(host->z.host, hoststr),
+            ntohs(host->z.port), (host->z.hostFlags & VENUSDOWN),
             tbuffer);
     (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
-    for (client = host->FirstClient; client; client = client->next) {
-       if (!client->deleted) {
-           expTime = client->expTime;
+    for (client = host->z.FirstClient; client; client = client->z.next) {
+       if (!client->z.deleted) {
+           expTime = client->z.expTime;
            strftime(tbuffer, sizeof(tbuffer), "%a %b %d %H:%M:%S %Y",
                     localtime_r(&expTime, &tm));
            snprintf(tmpStr, sizeof tmpStr,
                     "    user id=%d,  name=%s, sl=%s till %s\n",
-                    client->ViceId, h_UserName(client),
-                    client->authClass ? "Authenticated"
+                    client->z.ViceId, h_UserName(client),
+                    client->z.authClass ? "Authenticated"
                                       : "Not authenticated",
-                    client->authClass ? tbuffer : "No Limit");
+                    client->z.authClass ? tbuffer : "No Limit");
            (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
            snprintf(tmpStr, sizeof tmpStr, "      CPS-%d is [",
-                        client->CPS.prlist_len);
+                        client->z.CPS.prlist_len);
            (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
-           if (client->CPS.prlist_val) {
-               for (i = 0; i < client->CPS.prlist_len; i++) {
+           if (client->z.CPS.prlist_val) {
+               for (i = 0; i < client->z.CPS.prlist_len; i++) {
                    snprintf(tmpStr, sizeof tmpStr, " %d",
-                            client->CPS.prlist_val[i]);
+                            client->z.CPS.prlist_val[i]);
                    (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
                }
            }
@@ -3072,29 +3074,29 @@ h_DumpHost(struct host *host, void *rock)
             "ip:%s port:%d hidx:%d cbid:%d lock:%x last:%u active:%u "
             "down:%d del:%d cons:%d cldel:%d\n\t hpfailed:%d hcpsCall:%u "
             "hcps [",
-            afs_inet_ntoa_r(host->host, hoststr), ntohs(host->port),
-            host->index, host->cblist, CheckLock(&host->lock),
-            host->LastCall, host->ActiveCall, (host->hostFlags & VENUSDOWN),
-            host->hostFlags & HOSTDELETED, host->Console,
-            host->hostFlags & CLIENTDELETED, host->hcpsfailed,
-            host->cpsCall);
+            afs_inet_ntoa_r(host->z.host, hoststr), ntohs(host->z.port),
+            host->index, host->z.cblist, CheckLock(&host->lock),
+            host->z.LastCall, host->z.ActiveCall, (host->z.hostFlags & VENUSDOWN),
+            host->z.hostFlags & HOSTDELETED, host->z.Console,
+            host->z.hostFlags & CLIENTDELETED, host->z.hcpsfailed,
+            host->z.cpsCall);
     (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
-    if (host->hcps.prlist_val)
-       for (i = 0; i < host->hcps.prlist_len; i++) {
-           snprintf(tmpStr, sizeof tmpStr, " %d", host->hcps.prlist_val[i]);
+    if (host->z.hcps.prlist_val)
+       for (i = 0; i < host->z.hcps.prlist_len; i++) {
+           snprintf(tmpStr, sizeof tmpStr, " %d", host->z.hcps.prlist_val[i]);
            (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
        }
     sprintf(tmpStr, "] [");
     (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
-    if (host->interface)
-       for (i = 0; i < host->interface->numberOfInterfaces; i++) {
+    if (host->z.interface)
+       for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
            char hoststr[16];
            sprintf(tmpStr, " %s:%d",
-                    afs_inet_ntoa_r(host->interface->interface[i].addr, hoststr),
-                    ntohs(host->interface->interface[i].port));
+                    afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr),
+                    ntohs(host->z.interface->interface[i].port));
            (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
        }
-    sprintf(tmpStr, "] refCount:%d hostFlags:%hu\n", host->refCount, host->hostFlags);
+    sprintf(tmpStr, "] refCount:%d hostFlags:%hu\n", host->z.refCount, host->z.hostFlags);
     (void)STREAM_WRITE(tmpStr, strlen(tmpStr), 1, file);
 
     H_UNLOCK;
@@ -3171,8 +3173,7 @@ h_isBusy_r(struct host *host)
        return 1;
     }
 
-    if ((host->hostFlags & HWHO_INPROGRESS) || !(host->hostFlags & ALTADDR)) {
-       /* We shouldn't hit this if the host wasn't locked, but just in case... */
+    if (hostBusyFlags(host->z.hostFlags)) {
        return 1;
     }
 
@@ -3267,7 +3268,7 @@ static int
 h_stateRestoreIndex(struct host * h, void *rock)
 {
     struct fs_dump_state *state = (struct fs_dump_state *)rock;
-    if (cb_OldToNew(state, h->cblist, &h->cblist)) {
+    if (cb_OldToNew(state, h->z.cblist, &h->z.cblist)) {
        return H_ENUMERATE_BAIL(0);
     }
     return 0;
@@ -3291,18 +3292,18 @@ h_stateVerifyHost(struct host * h, void* rock)
        return H_ENUMERATE_BAIL(0);
     }
 
-    if (h->interface) {
-       for (i = h->interface->numberOfInterfaces-1; i >= 0; i--) {
-           if (h_stateVerifyAddrHash(state, h, h->interface->interface[i].addr,
-                                     h->interface->interface[i].port,
-                                     h->interface->interface[i].valid)) {
+    if (h->z.interface) {
+       for (i = h->z.interface->numberOfInterfaces-1; i >= 0; i--) {
+           if (h_stateVerifyAddrHash(state, h, h->z.interface->interface[i].addr,
+                                     h->z.interface->interface[i].port,
+                                     h->z.interface->interface[i].valid)) {
                state->bail = 1;
            }
        }
        if (h_stateVerifyUuidHash(state, h)) {
            state->bail = 1;
        }
-    } else if (h_stateVerifyAddrHash(state, h, h->host, h->port, 1)) {
+    } else if (h_stateVerifyAddrHash(state, h, h->z.host, h->z.port, 1)) {
        state->bail = 1;
     }
 
@@ -3402,7 +3403,7 @@ h_stateVerifyUuidHash(struct fs_dump_state * state, struct host * h)
     int ret = 0;
     struct host *host = NULL;
     struct h_UuidHashChain *chain;
-    afsUUID * uuidp = &h->interface->uuid;
+    afsUUID * uuidp = &h->z.interface->uuid;
     int index = h_UuidHashIndex(uuidp);
     char tmp[40];
     int chain_len = 0;
@@ -3415,8 +3416,8 @@ h_stateVerifyUuidHash(struct fs_dump_state * state, struct host * h)
            ret = 1;
            goto done;
        }
-       if (host->interface &&
-           afs_uuid_equal(&host->interface->uuid, uuidp)) {
+       if (host->z.interface &&
+           afs_uuid_equal(&host->z.interface->uuid, uuidp)) {
            if (host != h) {
                ViceLog(0, ("h_stateVerifyUuidHash: warning: uuid hash entry points to different host struct (%d, %d)\n",
                            h->index, host->index));
@@ -3501,7 +3502,7 @@ h_stateSaveHost(struct host * host, void* rock)
     if (h_isBusy_r(host)) {
        char hoststr[16];
        ViceLog(1, ("Not saving host %s:%d to disk; host appears busy\n",
-                   afs_inet_ntoa_r(host->host, hoststr), (int)ntohs(host->port)));
+                   afs_inet_ntoa_r(host->z.host, hoststr), (int)ntohs(host->z.port)));
        /* Make sure we don't try to save callbacks to disk for this host, or
         * we'll get confused on restore */
        DeleteAllCallBacks_r(host, 1);
@@ -3515,23 +3516,23 @@ h_stateSaveHost(struct host * host, void* rock)
     }
 
     h_hostToDiskEntry_r(host, &hdsk);
-    if (host->interface) {
+    if (host->z.interface) {
        if_len = sizeof(struct Interface) +
-           ((host->interface->numberOfInterfaces-1) * sizeof(struct AddrPort));
+           ((host->z.interface->numberOfInterfaces-1) * sizeof(struct AddrPort));
        ifp = malloc(if_len);
        opr_Assert(ifp != NULL);
-       memcpy(ifp, host->interface, if_len);
-       hdr.interfaces = host->interface->numberOfInterfaces;
+       memcpy(ifp, host->z.interface, if_len);
+       hdr.interfaces = host->z.interface->numberOfInterfaces;
        iov[iovcnt].iov_base = (char *) ifp;
        iov[iovcnt].iov_len = if_len;
        iovcnt++;
     }
-    if (host->hcps.prlist_val) {
-       hdr.hcps = host->hcps.prlist_len;
+    if (host->z.hcps.prlist_val) {
+       hdr.hcps = host->z.hcps.prlist_len;
        hcps_len = hdr.hcps * sizeof(afs_int32);
        hcps = malloc(hcps_len);
        opr_Assert(hcps != NULL);
-       memcpy(hcps, host->hcps.prlist_val, hcps_len);
+       memcpy(hcps, host->z.hcps.prlist_val, hcps_len);
        iov[iovcnt].iov_base = (char *) hcps;
        iov[iovcnt].iov_len = hcps_len;
        iovcnt++;
@@ -3634,7 +3635,7 @@ h_stateRestoreHost(struct fs_dump_state * state)
        opr_Assert(hcps != NULL);
     }
 
-    if ((hdsk.hostFlags & HWHO_INPROGRESS) || !(hdsk.hostFlags & ALTADDR)) {
+    if (hostBusyFlags(hdsk.hostFlags)) {
        char hoststr[16];
        ViceLog(0, ("h_stateRestoreHost: skipping host %s:%d due to invalid flags 0x%x\n",
                    afs_inet_ntoa_r(hdsk.host, hoststr), (int)ntohs(hdsk.port),
@@ -3649,23 +3650,23 @@ h_stateRestoreHost(struct fs_dump_state * state)
     opr_Assert(host != NULL);
 
     if (ifp) {
-       host->interface = ifp;
+       host->z.interface = ifp;
     }
     if (hcps) {
-       host->hcps.prlist_val = hcps;
-       host->hcps.prlist_len = hdr.hcps;
+       host->z.hcps.prlist_val = hcps;
+       host->z.hcps.prlist_len = hdr.hcps;
     }
 
     h_diskEntryToHost_r(&hdsk, host);
     h_SetupCallbackConn_r(host);
 
-    h_AddHostToAddrHashTable_r(host->host, host->port, host);
+    h_AddHostToAddrHashTable_r(host->z.host, host->z.port, host);
     if (ifp) {
        int i;
        for (i = ifp->numberOfInterfaces-1; i >= 0; i--) {
             if (ifp->interface[i].valid &&
-                !(ifp->interface[i].addr == host->host &&
-                  ifp->interface[i].port == host->port)) {
+               !(ifp->interface[i].addr == host->z.host &&
+                 ifp->interface[i].port == host->z.port)) {
                 h_AddHostToAddrHashTable_r(ifp->interface[i].addr,
                                            ifp->interface[i].port,
                                            host);
@@ -3694,37 +3695,37 @@ h_stateRestoreHost(struct fs_dump_state * state)
 static void
 h_hostToDiskEntry_r(struct host * in, struct hostDiskEntry * out)
 {
-    out->host = in->host;
-    out->port = in->port;
-    out->hostFlags = in->hostFlags;
-    out->Console = in->Console;
-    out->hcpsfailed = in->hcpsfailed;
-    out->LastCall = in->LastCall;
-    out->ActiveCall = in->ActiveCall;
-    out->cpsCall = in->cpsCall;
-    out->cblist = in->cblist;
-    out->InSameNetwork = in->InSameNetwork;
+    out->host = in->z.host;
+    out->port = in->z.port;
+    out->hostFlags = in->z.hostFlags;
+    out->Console = in->z.Console;
+    out->hcpsfailed = in->z.hcpsfailed;
+    out->LastCall = in->z.LastCall;
+    out->ActiveCall = in->z.ActiveCall;
+    out->cpsCall = in->z.cpsCall;
+    out->cblist = in->z.cblist;
+    out->InSameNetwork = in->z.InSameNetwork;
 
     /* special fields we save, but are not memcpy'd back on restore */
     out->index = in->index;
-    out->hcps_len = in->hcps.prlist_len;
-    out->hcps_valid = (in->hcps.prlist_val == NULL) ? 0 : 1;
+    out->hcps_len = in->z.hcps.prlist_len;
+    out->hcps_valid = (in->z.hcps.prlist_val == NULL) ? 0 : 1;
 }
 
 /* restore a host structure from disk */
 static void
 h_diskEntryToHost_r(struct hostDiskEntry * in, struct host * out)
 {
-    out->host = in->host;
-    out->port = in->port;
-    out->hostFlags = in->hostFlags;
-    out->Console = in->Console;
-    out->hcpsfailed = in->hcpsfailed;
-    out->LastCall = in->LastCall;
-    out->ActiveCall = in->ActiveCall;
-    out->cpsCall = in->cpsCall;
-    out->cblist = in->cblist;
-    out->InSameNetwork = in->InSameNetwork;
+    out->z.host = in->host;
+    out->z.port = in->port;
+    out->z.hostFlags = in->hostFlags;
+    out->z.Console = in->Console;
+    out->z.hcpsfailed = in->hcpsfailed;
+    out->z.LastCall = in->LastCall;
+    out->z.ActiveCall = in->ActiveCall;
+    out->z.cpsCall = in->cpsCall;
+    out->z.cblist = in->cblist;
+    out->z.InSameNetwork = in->InSameNetwork;
 }
 
 /* index translation routines */
@@ -3765,12 +3766,12 @@ h_GetWorkStats(int *nump, int *activep, int *delp, afs_int32 cutofftime)
     int count;
 
     H_LOCK;
-    for (count = 0, host = hostList; host && count < hostCount; host = host->next, count++) {
-       if (!(host->hostFlags & HOSTDELETED)) {
+    for (count = 0, host = hostList; host && count < hostCount; host = host->z.next, count++) {
+       if (!(host->z.hostFlags & HOSTDELETED)) {
            num++;
-           if (host->ActiveCall > cutofftime)
+           if (host->z.ActiveCall > cutofftime)
                active++;
-           if (host->hostFlags & VENUSDOWN)
+           if (host->z.hostFlags & VENUSDOWN)
                del++;
        }
     }
@@ -3958,15 +3959,15 @@ h_GetHostNetStats(afs_int32 * a_numHostsP, afs_int32 * a_sameNetOrSubnetP,
     *a_diffNetworkP = (afs_int32) 0;
 
     H_LOCK;
-    for (count = 0, hostP = hostList; hostP && count < hostCount; hostP = hostP->next, count++) {
-       if (!(hostP->hostFlags & HOSTDELETED)) {
+    for (count = 0, hostP = hostList; hostP && count < hostCount; hostP = hostP->z.next, count++) {
+       if (!(hostP->z.hostFlags & HOSTDELETED)) {
            /*
             * Bump the number of undeleted host entries found.
             * In classifying the current entry's address, make
             * sure to first convert to host byte order.
             */
            (*a_numHostsP)++;
-           currAddr_HBO = (afs_uint32) ntohl(hostP->host);
+           currAddr_HBO = (afs_uint32) ntohl(hostP->z.host);
            h_ClassifyAddress(FS_HostAddr_HBO, currAddr_HBO,
                              a_sameNetOrSubnetP, a_diffSubnetP,
                              a_diffNetworkP);
@@ -4010,23 +4011,23 @@ CheckHost_r(struct host *host, void *dummy)
 #endif
 
     /* Host is held by h_Enumerate_r */
-    for (client = host->FirstClient; client; client = client->next) {
-       if (client->refCount == 0 && client->LastCall < clientdeletetime) {
-           client->deleted = 1;
-           host->hostFlags |= CLIENTDELETED;
+    for (client = host->z.FirstClient; client; client = client->z.next) {
+       if (client->z.refCount == 0 && client->z.LastCall < clientdeletetime) {
+           client->z.deleted = 1;
+           host->z.hostFlags |= CLIENTDELETED;
        }
     }
-    if (host->LastCall < checktime) {
+    if (host->z.LastCall < checktime) {
        h_Lock_r(host);
-       if (!(host->hostFlags & HOSTDELETED)) {
-           host->hostFlags |= HWHO_INPROGRESS;
-           cb_conn = host->callback_rxcon;
+       if (!(host->z.hostFlags & HOSTDELETED)) {
+           host->z.hostFlags |= HWHO_INPROGRESS;
+           cb_conn = host->z.callback_rxcon;
            rx_GetConnection(cb_conn);
-           if (host->LastCall < clientdeletetime) {
-               host->hostFlags |= HOSTDELETED;
-               if (!(host->hostFlags & VENUSDOWN)) {
-                   host->hostFlags &= ~ALTADDR;        /* alternate address invalid */
-                   if (host->interface) {
+           if (host->z.LastCall < clientdeletetime) {
+               host->z.hostFlags |= HOSTDELETED;
+               if (!(host->z.hostFlags & VENUSDOWN)) {
+                   host->z.hostFlags &= ~ALTADDR;      /* alternate address invalid */
+                   if (host->z.interface) {
                        H_UNLOCK;
                        code =
                            RXAFSCB_InitCallBackState3(cb_conn,
@@ -4038,14 +4039,14 @@ CheckHost_r(struct host *host, void *dummy)
                            RXAFSCB_InitCallBackState(cb_conn);
                        H_LOCK;
                    }
-                   host->hostFlags |= ALTADDR; /* alternate addresses valid */
+                   host->z.hostFlags |= ALTADDR;       /* alternate addresses valid */
                    if (code) {
                        char hoststr[16];
-                       (void)afs_inet_ntoa_r(host->host, hoststr);
+                       (void)afs_inet_ntoa_r(host->z.host, hoststr);
                        ViceLog(0,
                                ("CB: RCallBackConnectBack (host.c) failed for host %s:%d\n",
-                                hoststr, ntohs(host->port)));
-                       host->hostFlags |= VENUSDOWN;
+                                hoststr, ntohs(host->z.port)));
+                       host->z.hostFlags |= VENUSDOWN;
                    }
                    /* Note:  it's safe to delete hosts even if they have call
                     * back state, because break delayed callbacks (called when a
@@ -4055,19 +4056,19 @@ CheckHost_r(struct host *host, void *dummy)
                     */
                }
            } else {
-               if (!(host->hostFlags & VENUSDOWN) && host->cblist) {
+               if (!(host->z.hostFlags & VENUSDOWN) && host->z.cblist) {
                    char hoststr[16];
-                   (void)afs_inet_ntoa_r(host->host, hoststr);
-                   if (host->interface) {
-                       afsUUID uuid = host->interface->uuid;
+                   (void)afs_inet_ntoa_r(host->z.host, hoststr);
+                   if (host->z.interface) {
+                       afsUUID uuid = host->z.interface->uuid;
                        H_UNLOCK;
                        code = RXAFSCB_ProbeUuid(cb_conn, &uuid);
                        H_LOCK;
                        if (code) {
                            if (MultiProbeAlternateAddress_r(host)) {
                                ViceLog(0,("CheckHost_r: Probing all interfaces of host %s:%d failed, code %d\n",
-                                           hoststr, ntohs(host->port), code));
-                               host->hostFlags |= VENUSDOWN;
+                                           hoststr, ntohs(host->z.port), code));
+                               host->z.hostFlags |= VENUSDOWN;
                            }
                        }
                    } else {
@@ -4077,8 +4078,8 @@ CheckHost_r(struct host *host, void *dummy)
                        if (code) {
                            ViceLog(0,
                                    ("CheckHost_r: Probe failed for host %s:%d, code %d\n",
-                                    hoststr, ntohs(host->port), code));
-                           host->hostFlags |= VENUSDOWN;
+                                    hoststr, ntohs(host->z.port), code));
+                           host->z.hostFlags |= VENUSDOWN;
                        }
                    }
                }
@@ -4087,7 +4088,7 @@ CheckHost_r(struct host *host, void *dummy)
            rx_PutConnection(cb_conn);
            cb_conn=NULL;
            H_LOCK;
-           host->hostFlags &= ~HWHO_INPROGRESS;
+           host->z.hostFlags &= ~HWHO_INPROGRESS;
        }
        h_Unlock_r(host);
     }
@@ -4147,8 +4148,8 @@ initInterfaceAddr_r(struct host *host, struct interfaceAddr *interf)
     opr_Assert(interf);
 
     number = interf->numberOfInterfaces;
-    myAddr = host->host;       /* current interface address */
-    myPort = host->port;       /* current port */
+    myAddr = host->z.host;     /* current interface address */
+    myPort = host->z.port;     /* current port */
 
     ViceLog(125,
            ("initInterfaceAddr : host %s:%d numAddr %d\n",
@@ -4250,19 +4251,19 @@ initInterfaceAddr_r(struct host *host, struct interfaceAddr *interf)
 
     interface->uuid = interf->uuid;
 
-    opr_Assert(!host->interface);
-    host->interface = interface;
+    opr_Assert(!host->z.interface);
+    host->z.interface = interface;
 
     h_AddHostToUuidHashTable_r(&interface->uuid, host);
 
-    if (LogLevel >= 125) {
+    if (GetLogLevel() >= 125) {
        afsUUID_to_string(&interface->uuid, uuidstr, 127);
 
        ViceLog(125, ("--- uuid %s\n", uuidstr));
-       for (i = 0; i < host->interface->numberOfInterfaces; i++) {
+       for (i = 0; i < host->z.interface->numberOfInterfaces; i++) {
            ViceLog(125, ("--- alt address %s:%d\n",
-                         afs_inet_ntoa_r(host->interface->interface[i].addr, hoststr),
-                         ntohs(host->interface->interface[i].port)));
+                         afs_inet_ntoa_r(host->z.interface->interface[i].addr, hoststr),
+                         ntohs(host->z.interface->interface[i].port)));
        }
     }
 
@@ -4286,8 +4287,8 @@ h_DeleteHostFromAddrHashTable_r(afs_uint32 addr, afs_uint16 port,
         opr_Assert(th->hostPtr);
         if (th->hostPtr == host && th->addr == addr && th->port == port) {
            ViceLog(125, ("h_DeleteHostFromAddrHashTable_r: host %" AFS_PTR_FMT " (%s:%d)\n",
-                         host, afs_inet_ntoa_r(host->host, hoststr),
-                         ntohs(host->port)));
+                         host, afs_inet_ntoa_r(host->z.host, hoststr),
+                         ntohs(host->z.port)));
             *hp = th->next;
             free(th);
            return 1;
@@ -4295,8 +4296,8 @@ h_DeleteHostFromAddrHashTable_r(afs_uint32 addr, afs_uint16 port,
     }
     ViceLog(125,
            ("h_DeleteHostFromAddrHashTable_r: host %" AFS_PTR_FMT " (%s:%d) not found\n",
-            host, afs_inet_ntoa_r(host->host, hoststr),
-            ntohs(host->port)));
+            host, afs_inet_ntoa_r(host->z.host, hoststr),
+            ntohs(host->z.port)));
     return 0;
 }
 
@@ -4311,15 +4312,17 @@ printInterfaceAddr(struct host *host, int level)
     int i, number;
     char hoststr[16];
 
-    if (host->interface) {
+    if (host->z.interface) {
        /* check alternate addresses */
-       number = host->interface->numberOfInterfaces;
+       number = host->z.interface->numberOfInterfaces;
         if (number == 0) {
-            ViceLog(level, ("no-addresses "));
+           ViceLog(level, ("no-addresses "));
        } else {
             for (i = 0; i < number; i++)
-                ViceLog(level, ("%s:%d ", afs_inet_ntoa_r(host->interface->interface[i].addr, hoststr),
-                                ntohs(host->interface->interface[i].port)));
+               ViceLog(level, ("%s:%d ",
+                   afs_inet_ntoa_r(host->z.interface->interface[i].addr,
+                       hoststr),
+                   ntohs(host->z.interface->interface[i].port)));
         }
     }
     ViceLog(level, ("\n"));