/*
* Update a volume. Caller holds volume's lock (volp->mx).
+ *
+ *
+ * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:38 (JHutz)
+ * Yes, we support multihomed fileservers.
+ * Since before we got the code from IBM.
+ * But to find out about multiple addresses on a multihomed server, you need
+ * to use VL_GetEntryByNameU and VL_GetAddrsU. If you use
+ * VL_GetEntryByNameO or VL_GetEntryByNameN, the vlserver just gives you one
+ * address per server.
+ * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:39 (JHutz)
+ * see src/afs/afs_volume.c, paying particular attention to
+ * afs_NewVolumeByName, afs_SetupVolume, and InstallUVolumeEntry
+ * shadow / openafs / jaltman {ANDREW.CMU.EDU} 01:40 (Jeffrey Altman)
+ * thanks. The windows client calls the 0 versions.
+ * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:51 (JHutz)
+ * Oh. Ew.
+ * By not using the N versions, you only get up to 8 sites instead of 13.
+ * By not using the U versions, you don't get to know about multihomed serve
+ * shadow / openafs / jhutz@CS.CMU.EDU {ANDREW.CMU.EDU} 01:52 (JHutz)
+ * Of course, you probably want to support the older versions for backward
+ * compatibility. If you do that, you need to call the newest interface
+ * first, and fall back to successively older versions if you get
+ * RXGEN_OPCODE.
*/
long cm_UpdateVolume(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *reqp,
cm_volume_t *volp)
{
cm_conn_t *connp;
int i;
- cm_serverRef_t *tsrp;
+ cm_serverRef_t *tsrp;
cm_server_t *tsp;
struct sockaddr_in tsockAddr;
long tflags;
u_long tempAddr;
- struct vldbentry vldbEntry; /* don't use NVLDB yet; they're not common */
- int ROcount = 0;
- long code;
+ struct vldbentry vldbEntry;
+ struct nvldbentry nvldbEntry;
+#ifdef MULTIHOMED
+ struct uvldbentry uvldbEntry;
+#endif
+ int type = -1;
+ int ROcount = 0;
+ long code;
- /* clear out old bindings */
+ /* clear out old bindings */
cm_FreeServerList(&volp->rwServersp);
cm_FreeServerList(&volp->roServersp);
cm_FreeServerList(&volp->bkServersp);
/* now we have volume structure locked and held; make RPC to fill it */
do {
- code = cm_ConnByMServers(cellp->vlServersp, userp, reqp,
- &connp);
- if (code) continue;
- osi_Log1(afsd_logp, "CALL VL_GetEntryByNameO name %s",
- volp->namep);
- code = VL_GetEntryByNameO(connp->callp, volp->namep, &vldbEntry);
- } while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
+ code = cm_ConnByMServers(cellp->vlServersp, userp, reqp, &connp);
+ if (code)
+ continue;
+ osi_Log1(afsd_logp, "CALL VL_GetEntryByName{UNO} name %s", volp->namep);
+#ifdef MULTIHOMED
+ code = VL_GetEntryByNameU(connp->callp, volp->namep, &uvldbEntry);
+ if ( code == RXGEN_OPCODE )
+#endif
+ {
+ code = VL_GetEntryByNameN(connp->callp, volp->namep, &nvldbEntry);
+ type = 1;
+ }
+ if ( code == RXGEN_OPCODE ) {
+ code = VL_GetEntryByNameO(connp->callp, volp->namep, &vldbEntry);
+ type = 0;
+ }
+ } while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
code = cm_MapVLRPCError(code, reqp);
if (code == 0) {
- /* decode the response */
- lock_ObtainWrite(&cm_volumeLock);
- if (vldbEntry.flags & VLF_RWEXISTS)
- volp->rwID = vldbEntry.volumeId[0];
- else
+ afs_int32 flags;
+ afs_int32 nServers;
+ afs_int32 rwID;
+ afs_int32 roID;
+ afs_int32 bkID;
+ afs_int32 serverNumber[NMAXNSERVERS];
+ afs_int32 serverFlags[NMAXNSERVERS];
+
+ switch ( type ) {
+ case 0:
+ flags = vldbEntry.flags;
+ nServers = vldbEntry.nServers;
+ rwID = vldbEntry.volumeId[0];
+ roID = vldbEntry.volumeId[1];
+ bkID = vldbEntry.volumeId[2];
+ for ( i=0; i<nServers; i++ ) {
+ serverFlags[i] = vldbEntry.serverFlags[i];
+ serverNumber[i] = vldbEntry.serverNumber[i];
+ }
+ break;
+ case 1:
+ flags = nvldbEntry.flags;
+ nServers = nvldbEntry.nServers;
+ rwID = nvldbEntry.volumeId[0];
+ roID = nvldbEntry.volumeId[1];
+ bkID = nvldbEntry.volumeId[2];
+ for ( i=0; i<nServers; i++ ) {
+ serverFlags[i] = nvldbEntry.serverFlags[i];
+ serverNumber[i] = nvldbEntry.serverNumber[i];
+ }
+ break;
+#ifdef MULTIHOMED
+ case 2:
+ flags = uvldbEntry.flags;
+ nServers = uvldbEntry.nServers;
+ rwID = uvldbEntry.volumeId[0];
+ roID = uvldbEntry.volumeId[1];
+ bkID = uvldbEntry.volumeId[2];
+ for ( i=0; i<nServers; i++ ) {
+ serverFlags[i] = uvldbEntry.serverFlags[i];
+ if ( !(flags & VLSERVER_FLAG_UUID) )
+ serverNumber[i] = uvldbEntry.serverNumber[i].time_low;
+ else {
+ /* see afs/afs_volume.c InstallUVolumeEntry(). We need to
+ * implement an equivalent to afs_FindServer() and afs_GetServer()
+ * which support multiple addresses.
+ */
+ }
+ }
+ break;
+#endif
+ }
+
+ /* decode the response */
+ lock_ObtainWrite(&cm_volumeLock);
+ if (flags & VLF_RWEXISTS)
+ volp->rwID = rwID;
+ else
volp->rwID = 0;
- if (vldbEntry.flags & VLF_ROEXISTS)
- volp->roID = vldbEntry.volumeId[1];
+ if (flags & VLF_ROEXISTS)
+ volp->roID = roID;
else
volp->roID = 0;
- if (vldbEntry.flags & VLF_BACKEXISTS)
- volp->bkID = vldbEntry.volumeId[2];
- else
+ if (flags & VLF_BACKEXISTS)
+ volp->bkID = bkID;
+ else
volp->bkID = 0;
- lock_ReleaseWrite(&cm_volumeLock);
- for(i=0; i<vldbEntry.nServers; i++) {
- /* create a server entry */
- tflags = vldbEntry.serverFlags[i];
- if (tflags & VLSF_DONTUSE) continue;
- tsockAddr.sin_family = AF_INET;
- tempAddr = htonl(vldbEntry.serverNumber[i]);
- tsockAddr.sin_addr.s_addr = tempAddr;
- tsp = cm_FindServer(&tsockAddr, CM_SERVER_FILE);
- if (!tsp)
+ lock_ReleaseWrite(&cm_volumeLock);
+ for (i=0; i<nServers; i++) {
+ /* create a server entry */
+ tflags = serverFlags[i];
+ if (tflags & VLSF_DONTUSE)
+ continue;
+ tsockAddr.sin_family = AF_INET;
+ tempAddr = htonl(serverNumber[i]);
+ tsockAddr.sin_addr.s_addr = tempAddr;
+ tsp = cm_FindServer(&tsockAddr, CM_SERVER_FILE);
+ if (!tsp)
tsp = cm_NewServer(&tsockAddr, CM_SERVER_FILE,
cellp);
- /* if this server was created by fs setserverprefs */
- if ( !tsp->cellp )
- tsp->cellp = cellp;
+ /* if this server was created by fs setserverprefs */
+ if ( !tsp->cellp )
+ tsp->cellp = cellp;
osi_assert(tsp != NULL);
/* and add it to the list(s). */
- /*
+ /*
* Each call to cm_NewServerRef() increments the
* ref count of tsp. These reference will be dropped,
- * if and when the volume is reset; see reset code
- * earlier in this function.
- */
- if ((tflags & VLSF_RWVOL)
- && (vldbEntry.flags & VLF_RWEXISTS)) {
- tsrp = cm_NewServerRef(tsp);
+ * if and when the volume is reset; see reset code
+ * earlier in this function.
+ */
+ if ((tflags & VLSF_RWVOL) && (flags & VLF_RWEXISTS)) {
+ tsrp = cm_NewServerRef(tsp);
cm_InsertServerList(&volp->rwServersp, tsrp);
lock_ObtainWrite(&cm_serverLock);
tsrp->refCount--; /* drop allocation reference */
lock_ReleaseWrite(&cm_serverLock);
- }
- if ((tflags & VLSF_ROVOL)
- && (vldbEntry.flags & VLF_ROEXISTS)) {
- tsrp = cm_NewServerRef(tsp);
- cm_InsertServerList(&volp->roServersp, tsrp);
+ }
+ if ((tflags & VLSF_ROVOL) && (flags & VLF_ROEXISTS)) {
+ tsrp = cm_NewServerRef(tsp);
+ cm_InsertServerList(&volp->roServersp, tsrp);
lock_ObtainWrite(&cm_serverLock);
tsrp->refCount--; /* drop allocation reference */
lock_ReleaseWrite(&cm_serverLock);
- ROcount++;
+ ROcount++;
}
- /* We don't use VLSF_BACKVOL !?! */
- if ((tflags & VLSF_RWVOL)
- && (vldbEntry.flags & VLF_BACKEXISTS)) {
- tsrp = cm_NewServerRef(tsp);
+ /* We don't use VLSF_BACKVOL !?! */
+ if ((tflags & VLSF_RWVOL) && (flags & VLF_BACKEXISTS)) {
+ tsrp = cm_NewServerRef(tsp);
cm_InsertServerList(&volp->bkServersp, tsrp);
lock_ObtainWrite(&cm_serverLock);
tsrp->refCount--; /* drop allocation reference */
lock_ReleaseWrite(&cm_serverLock);
- }
- /* Drop the reference obtained by cm_FindServer() */
- cm_PutServer(tsp);
+ }
+ /* Drop the reference obtained by cm_FindServer() */
+ cm_PutServer(tsp);
+ }
+
+ /*
+ * Randomize RO list
+ *
+ * If the first n servers have the same ipRank, then we
+ * randomly pick one among them and move it to the beginning.
+ * We don't bother to re-order the whole list because
+ * the rest of the list is used only if the first server is
+ * down. We only do this for the RO list; we assume the other
+ * lists are length 1.
+ */
+ if (ROcount > 1) {
+ cm_RandomizeServer(&volp->roServersp);
}
-
- /*
- * Randomize RO list
- *
- * If the first n servers have the same ipRank, then we
- * randomly pick one among them and move it to the beginning.
- * We don't bother to re-order the whole list because
- * the rest of the list is used only if the first server is
- * down. We only do this for the RO list; we assume the other
- * lists are length 1.
- */
- if (ROcount > 1) {
- cm_RandomizeServer(&volp->roServersp);
- }
- }
- return code;
+ }
+ return code;
}
long cm_GetVolumeByID(cm_cell_t *cellp, long volumeID, cm_user_t *userp,
git://git.openafs.org / openafs.git / blobdiff