return 0;
}
+/*
+ * This is called with host locked and held.
+ *
+ * All addresses are in network byte order.
+ */
+static int
+invalidateInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
+{
+ int i;
+ int number;
+ struct Interface *interface;
+ char hoststr[16], hoststr2[16];
+
+ assert(host);
+ assert(host->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),
+ ntohs(port)));
+
+ /*
+ * Make sure this address is on the list of known addresses
+ * for this host.
+ */
+ interface = host->interface;
+ number = host->interface->numberOfInterfaces;
+ for (i = 0; i < number; i++) {
+ if (interface->interface[i].addr == addr &&
+ interface->interface[i].port == port) {
+ if (interface->interface[i].valid) {
+ h_DeleteHostFromAddrHashTable_r(addr, port, host);
+ interface->interface[i].valid = 0;
+ }
+ return 0;
+ }
+ }
+
+ /* not found */
+ return 0;
+}
+
+/*
+ * This is called with host locked and held. This function differs
+ * from removeInterfaceAddr_r in that it is called when the address
+ * is being removed from the host regardless of whether or not there
+ * is an interface list for the host. This function will delete the
+ * host if there are no addresses left on it.
+ *
+ * All addresses are in network byte order.
+ */
+static int
+removeAddress_r(struct host *host, afs_uint32 addr, afs_uint16 port)
+{
+ int i;
+ 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;
+ /*
+ * Do not remove the primary addr/port from the hash table.
+ * It will be ignored due to the HOSTDELETED flag and will
+ * be removed when h_TossStuff_r() cleans up the HOSTDELETED
+ * host. Removing it here will only result in a search for
+ * 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)));
+ }
+ } else {
+ if (host->host == addr && host->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);
+ break;
+ }
+ }
+
+ if (i == host->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;
+ /* addr/port was removed from the hash table */
+ host->host = 0;
+ host->port = 0;
+ } else {
+ rxconn = host->callback_rxcon;
+ host->callback_rxcon = NULL;
+
+ if (rxconn) {
+ rx_DestroyConnection(rxconn);
+ rxconn = NULL;
+ }
+
+ 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);
+ }
+ } else {
+ /* not the primary addr/port, just invalidate it */
+ invalidateInterfaceAddr_r(host, addr, port);
+ }
+ }
+
+ return 0;
+}
+
+static void
+createHostAddrHashChain_r(int index, afs_uint32 addr, afs_uint16 port, struct host *host)
+{
+ struct h_AddrHashChain *chain;
+ char hoststr[16];
+
+ /* insert into beginning of list for this bucket */
+ chain = (struct h_AddrHashChain *)malloc(sizeof(struct h_AddrHashChain));
+ if (!chain) {
+ ViceLog(0, ("Failed malloc in h_AddHostToAddrHashTable_r\n"));
+ assert(0);
+ }
+ chain->hostPtr = host;
+ chain->next = hostAddrHashTable[index];
+ chain->addr = addr;
+ chain->port = port;
+ hostAddrHashTable[index] = chain;
+ ViceLog(125, ("h_AddHostToAddrHashTable_r: host %" AFS_PTR_FMT " added as %s:%d\n",
+ host, afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
+}
+
+/**
+ * Resolve host address conflicts when hashing by address.
+ *
+ * @param[in] addr an ip address of the interface
+ * @param[in] port the port of the interface
+ * @param[in] newHost the host being added with this address
+ * @param[in] oldHost the host previously added with this address
+ */
+static void
+reconcileHosts_r(afs_uint32 addr, afs_uint16 port, struct host *newHost,
+ struct host *oldHost)
+{
+ struct rx_connection *cb = NULL;
+ int code = 0;
+ struct interfaceAddr interf;
+ Capabilities caps;
+ afsUUID *newHostUuid = &nulluuid;
+ afsUUID *oldHostUuid = &nulluuid;
+ char hoststr[16];
+
+ ViceLog(125,
+ ("reconcileHosts_r: addr %s:%d newHost %" AFS_PTR_FMT " oldHost %"
+ AFS_PTR_FMT, afs_inet_ntoa_r(addr, hoststr), ntohs(port),
+ newHost, oldHost));
+
+ assert(oldHost != newHost);
+ caps.Capabilities_val = NULL;
+
+ if (!sc) {
+ sc = rxnull_NewClientSecurityObject();
+ }
+
+ cb = rx_NewConnection(addr, port, 1, sc, 0);
+ rx_SetConnDeadTime(cb, 50);
+ rx_SetConnHardDeadTime(cb, AFS_HARDDEADTIME);
+
+ h_Hold_r(newHost);
+ h_Hold_r(oldHost);
+ H_UNLOCK;
+ code = RXAFSCB_TellMeAboutYourself(cb, &interf, &caps);
+ if (code == RXGEN_OPCODE) {
+ code = RXAFSCB_WhoAreYou(cb, &interf);
+ }
+ H_LOCK;
+
+ if (code == RXGEN_OPCODE ||
+ (code == 0 && afs_uuid_equal(&interf.uuid, &nulluuid))) {
+ ViceLog(0,
+ ("reconcileHosts_r: WhoAreYou not supported for connection (%s:%d), error %d\n",
+ afs_inet_ntoa_r(addr, hoststr), ntohs(port), code));
+ goto fail;
+ }
+ if (code != 0) {
+ ViceLog(0,
+ ("reconcileHosts_r: WhoAreYou failed for connection (%s:%d), error %d\n",
+ afs_inet_ntoa_r(addr, hoststr), ntohs(port), code));
+ goto fail;
+ }
+
+ /* Since lock was dropped, the hosts may have been deleted during the rpcs. */
+ if ((newHost->hostFlags & HOSTDELETED)
+ && (oldHost->hostFlags & HOSTDELETED)) {
+ ViceLog(5,
+ ("reconcileHosts_r: new and old hosts were deleted during probe.\n"));
+ goto done;
+ }
+
+ /* 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 ((!(oldHost->hostFlags & HOSTDELETED)) && oldHost->interface) {
+ oldHostUuid = &(oldHost->interface->uuid);
+ }
+ if (afs_uuid_equal(newHostUuid, &nulluuid) &&
+ afs_uuid_equal(oldHostUuid, &nulluuid)) {
+ ViceLog(0,
+ ("reconcileHosts_r: Cannot reconcile hosts for connection (%s:%d), no uuids\n",
+ afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
+ goto done;
+ }
+ if (afs_uuid_equal(newHostUuid, oldHostUuid)) {
+ ViceLog(0,
+ ("reconcileHosts_r: Cannot reconcile hosts for connection (%s:%d), same uuids\n",
+ afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
+ goto done;
+ }
+
+ /* Determine which host should be hashed */
+ if ((!(newHost->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
+ * been changed when the host lock was dropped to get the uuid. */
+ struct h_AddrHashChain *chain;
+ int index = h_HashIndex(addr);
+ for (chain = hostAddrHashTable[index]; chain; chain = chain->next) {
+ if (chain->addr == addr && chain->port == port) {
+ chain->hostPtr = newHost;
+ removeAddress_r(oldHost, addr, port);
+ goto done;
+ }
+ }
+ createHostAddrHashChain_r(index, addr, port, newHost);
+ removeAddress_r(oldHost, addr, port);
+ goto done;
+ }
+ if ((!(oldHost->hostFlags & HOSTDELETED))
+ && afs_uuid_equal(oldHostUuid, &(interf.uuid))) {
+ removeAddress_r(newHost, addr, port);
+ goto done;
+ }
+
+ fail:
+ if (!(newHost->hostFlags & HOSTDELETED)) {
+ removeAddress_r(newHost, addr, port);
+ }
+ if (!(oldHost->hostFlags & HOSTDELETED)) {
+ removeAddress_r(oldHost, addr, port);
+ }
+
+ done:
+ h_Release_r(newHost);
+ h_Release_r(oldHost);
+ rx_DestroyConnection(cb);
+ return;
+}
+
/* inserts a new HashChain structure corresponding to this address */
void
h_AddHostToAddrHashTable_r(afs_uint32 addr, afs_uint16 port, struct host *host)
return;
}
if (!(chain->hostPtr->hostFlags & HOSTDELETED)) {
- ViceLog(0,
- ("h_AddHostToAddrHashTable_r: refusing to hash host %" AFS_PTR_FMT ", %"
- AFS_PTR_FMT " (%s:%d) already hashed\n",
- host, chain->hostPtr, afs_inet_ntoa_r(chain->addr, hoststr),
- ntohs(chain->port)));
- return;
+ /* attempt to resolve host address collision */
+ reconcileHosts_r(addr, port, host, chain->hostPtr);
+ return;
}
}
}
-
- /* insert into beginning of list for this bucket */
- chain = (struct h_AddrHashChain *)malloc(sizeof(struct h_AddrHashChain));
- if (!chain) {
- ViceLog(0, ("Failed malloc in h_AddHostToAddrHashTable_r\n"));
- assert(0);
- }
- chain->hostPtr = host;
- chain->next = hostAddrHashTable[index];
- chain->addr = addr;
- chain->port = port;
- hostAddrHashTable[index] = chain;
- ViceLog(125, ("h_AddHostToAddrHashTable_r: host %" AFS_PTR_FMT " added as %s:%d\n",
- host, afs_inet_ntoa_r(addr, hoststr), ntohs(port)));
+ createHostAddrHashChain_r(index, addr, port, host);
}
/*
return 0;
}
-/*
- * This is called with host locked and held.
- *
- * All addresses are in network byte order.
- */
-int
-invalidateInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port)
-{
- int i;
- int number;
- struct Interface *interface;
- char hoststr[16], hoststr2[16];
-
- assert(host);
- assert(host->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),
- ntohs(port)));
-
- /*
- * Make sure this address is on the list of known addresses
- * for this host.
- */
- interface = host->interface;
- number = host->interface->numberOfInterfaces;
- for (i = 0; i < number; i++) {
- if (interface->interface[i].addr == addr &&
- interface->interface[i].port == port) {
- if (interface->interface[i].valid) {
- h_DeleteHostFromAddrHashTable_r(addr, port, host);
- interface->interface[i].valid = 0;
- }
- return 0;
- }
- }
-
- /* not found */
- return 0;
-}
-
-/*
- * This is called with host locked and held. This function differs
- * from removeInterfaceAddr_r in that it is called when the address
- * is being removed from the host regardless of whether or not there
- * is an interface list for the host. This function will delete the
- * host if there are no addresses left on it.
- *
- * All addresses are in network byte order.
- */
-int
-removeAddress_r(struct host *host, afs_uint32 addr, afs_uint16 port)
-{
- int i;
- 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;
- /*
- * Do not remove the primary addr/port from the hash table.
- * It will be ignored due to the HOSTDELETED flag and will
- * be removed when h_TossStuff_r() cleans up the HOSTDELETED
- * host. Removing it here will only result in a search for
- * 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)));
- }
- } else {
- if (host->host == addr && host->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);
- break;
- }
- }
- if (i == host->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;
- /* addr/port was removed from the hash table */
- host->host = 0;
- host->port = 0;
- } else {
- rxconn = host->callback_rxcon;
- host->callback_rxcon = NULL;
- if (rxconn) {
- rx_DestroyConnection(rxconn);
- rxconn = NULL;
- }
-
- 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);
- }
- } else {
- /* not the primary addr/port, just invalidate it */
- invalidateInterfaceAddr_r(host, addr, port);
- }
- }
-
- return 0;
-}
static int
h_threadquota(int waiting)
{
git://git.openafs.org / openafs.git / blobdiff