/* * (C) Copyright Transarc Corporation 1990 * Licensed Materials - Property of Transarc * All Rights Reserved. */ /*------------------------------------------------------------------------ * xstat_cm.c * * Description: * Implementation of the client side of the AFS Cache Manager * extended statistics facility. * *------------------------------------------------------------------------*/ #include #include "xstat_cm.h" /*Interface for this module*/ #include /*Lightweight process package*/ #define LWP_STACK_SIZE (16 * 1024) /* * Routines we need that don't have explicit include file definitions. */ extern char *hostutil_GetNameByINet(); /*Host parsing utility*/ /* * Exported variables. */ int xstat_cm_numServers; /*Num connected servers*/ struct xstat_cm_ConnectionInfo *xstat_cm_ConnInfo; /*Ptr to connection array*/ int numCollections; /*Number of data collections*/ struct xstat_cm_ProbeResults xstat_cm_Results; /*Latest probe results*/ char terminationEvent; /*One-shot termination event*/ afs_int32 xstat_cmData[AFSCB_MAX_XSTAT_LONGS]; /*Buffer for collected data*/ /* * Private globals. */ static int xstat_cm_ProbeFreqInSecs; /*Probe freq. in seconds*/ static int xstat_cm_initflag = 0; /*Was init routine called?*/ static int xstat_cm_debug = 0; /*Debugging output enabled?*/ static int xstat_cm_oneShot = 0; /*One-shot operation?*/ static int (*xstat_cm_Handler)(); /*Probe handler routine*/ static PROCESS probeLWP_ID; /*Probe LWP process ID*/ static int xstat_cm_numCollections; /*Number of desired collections*/ static afs_int32 *xstat_cm_collIDP; /*Ptr to collection IDs desired*/ /*------------------------------------------------------------------------ * [private] xstat_cm_CleanupInit * * Description: * Set up for recovery after an error in initialization (i.e., * during a call to xstat_cm_Init. * * Arguments: * None. * * Returns: * 0 on success, * Error value otherwise. * * Environment: * This routine is private to the module. * * Side Effects: * Zeros out basic data structures. *------------------------------------------------------------------------*/ static int xstat_cm_CleanupInit() { /*xstat_cm_CleanupInit*/ xstat_cm_ConnInfo = (struct xstat_cm_ConnectionInfo *)0; xstat_cm_Results.probeNum = 0; xstat_cm_Results.probeTime = 0; xstat_cm_Results.connP = (struct xstat_cm_ConnectionInfo *)0; xstat_cm_Results.collectionNumber = 0; xstat_cm_Results.data.AFSCB_CollData_len = AFSCB_MAX_XSTAT_LONGS; xstat_cm_Results.data.AFSCB_CollData_val = (afs_int32 *)xstat_cmData; xstat_cm_Results.probeOK = 0; return(0); } /*xstat_cm_CleanupInit*/ /*------------------------------------------------------------------------ * [exported] xstat_cm_Cleanup * * Description: * Clean up our memory and connection state. * * Arguments: * int a_releaseMem : Should we free up malloc'ed areas? * * Returns: * 0 on total success, * -1 if the module was never initialized, or there was a problem * with the xstat_cm connection array. * * Environment: * xstat_cm_numServers should be properly set. We don't do anything * unless xstat_cm_Init() has already been called. * * Side Effects: * Shuts down Rx connections gracefully, frees allocated space * (if so directed). *------------------------------------------------------------------------*/ int xstat_cm_Cleanup(a_releaseMem) int a_releaseMem; { /*xstat_cm_Cleanup*/ static char rn[] = "xstat_cm_Cleanup"; /*Routine name*/ int code; /*Return code*/ int conn_idx; /*Current connection index*/ struct xstat_cm_ConnectionInfo *curr_conn; /*Ptr to xstat_cm connection*/ /* * Assume the best, but check the worst. */ if (!xstat_cm_initflag) { fprintf(stderr, "[%s] Refused; module not initialized\n", rn); return(-1); } else code = 0; /* * Take care of all Rx connections first. Check to see that the * server count is a legal value. */ if (xstat_cm_numServers <= 0) { fprintf(stderr, "[%s] Illegal number of servers (xstat_cm_numServers = %d)\n", rn, xstat_cm_numServers); code = -1; } else { if (xstat_cm_ConnInfo != (struct xstat_cm_ConnectionInfo *)0) { /* * The xstat_cm connection structure array exists. Go through * it and close up any Rx connections it holds. */ curr_conn = xstat_cm_ConnInfo; for (conn_idx = 0; conn_idx < xstat_cm_numServers; conn_idx++) { if (curr_conn->rxconn != (struct rx_connection *)0) { rx_DestroyConnection(curr_conn->rxconn); curr_conn->rxconn = (struct rx_connection *)0; } curr_conn++; } /*for each xstat_cm connection*/ } /*xstat_cm connection structure exists*/ } /*Legal number of servers*/ /* * If asked to, release the space we've allocated. */ if (a_releaseMem) { if (xstat_cm_ConnInfo != (struct xstat_cm_ConnectionInfo *)0) free(xstat_cm_ConnInfo); } /* * Return the news, whatever it is. */ return(code); } /*xstat_cm_Cleanup*/ /*------------------------------------------------------------------------ * [private] xstat_cm_LWP * * Description: * This LWP iterates over the server connections and gathers up * the desired statistics from each one on a regular basis, for * all known data collections. The associated handler function * is called each time a new data collection is received. * * Arguments: * None. * * Returns: * Nothing. * * Environment: * Started by xstat_cm_Init(), uses global structures and the * global private xstat_cm_oneShot variable. * * Side Effects: * As advertised. *------------------------------------------------------------------------*/ static void xstat_cm_LWP() { /*xstat_cm_LWP*/ static char rn[] = "xstat_cm_LWP"; /*Routine name*/ register afs_int32 code; /*Results of calls*/ int oneShotCode; /*Result of one-shot signal*/ struct timeval tv; /*Time structure*/ int conn_idx; /*Connection index*/ struct xstat_cm_ConnectionInfo *curr_conn; /*Current connection*/ afs_int32 srvVersionNumber; /*Xstat version #*/ afs_int32 clientVersionNumber; /*Client xstat version*/ afs_int32 numColls; /*Number of collections to get*/ afs_int32 *currCollIDP; /*Curr collection ID desired*/ /* * Set up some numbers we'll need. */ clientVersionNumber = AFSCB_XSTAT_VERSION; while (1) { /*Service loop*/ /* * Iterate through the server connections, gathering data. * Don't forget to bump the probe count and zero the statistics * areas before calling the servers. */ if (xstat_cm_debug) printf("[%s] Waking up, getting data from %d server(s)\n", rn, xstat_cm_numServers); curr_conn = xstat_cm_ConnInfo; xstat_cm_Results.probeNum++; for (conn_idx = 0; conn_idx < xstat_cm_numServers; conn_idx++) { /* * Grab the statistics for the current Cache Manager, if the * connection is valid. */ if (xstat_cm_debug) printf("[%s] Getting collections from Cache Manager '%s'\n", rn, curr_conn->hostName); if (curr_conn->rxconn != (struct rx_connection *)0) { if (xstat_cm_debug) printf("[%s] Connection OK, calling RXAFSCB_GetXStats\n", rn); /* * Probe the given CM for each desired collection. */ currCollIDP = xstat_cm_collIDP; for (numColls = 0; numColls < xstat_cm_numCollections; numColls++, currCollIDP++) { /* * Initialize the per-probe values. */ if (xstat_cm_debug) printf("[%s] Asking for data collection %d\n", rn, *currCollIDP); xstat_cm_Results.collectionNumber = *currCollIDP; xstat_cm_Results.data.AFSCB_CollData_len = AFSCB_MAX_XSTAT_LONGS; bzero(xstat_cm_Results.data.AFSCB_CollData_val, AFSCB_MAX_XSTAT_LONGS * 4); xstat_cm_Results.connP = curr_conn; if (xstat_cm_debug) { printf("%s: Calling RXAFSCB_GetXStats, conn=0x%x, clientVersionNumber=%d, collectionNumber=%d, srvVersionNumberP=0x%x, timeP=0x%x, dataP=0x%x\n", rn, curr_conn->rxconn, clientVersionNumber, *currCollIDP, &srvVersionNumber, &(xstat_cm_Results.probeTime), &(xstat_cm_Results.data)); printf("%s: [bufflen=%d, buffer at 0x%x]\n", rn, xstat_cm_Results.data.AFSCB_CollData_len, xstat_cm_Results.data.AFSCB_CollData_val); } xstat_cm_Results.probeOK = RXAFSCB_GetXStats(curr_conn->rxconn, clientVersionNumber, *currCollIDP, &srvVersionNumber, &(xstat_cm_Results.probeTime), &(xstat_cm_Results.data)); /* * Now that we (may) have the data for this connection, * call the associated handler function. The handler * does not take any explicit parameters, but rather * gets to the goodies via some of the objects exported * by this module. */ if (xstat_cm_debug) printf("[%s] Calling handler routine.\n", rn); code = xstat_cm_Handler(); if (code) fprintf(stderr, "[%s] Handler routine got error code %d\n", rn, code); } /*For each collection*/ } /*Valid Rx connection*/ /* * Advance the xstat_cm connection pointer. */ curr_conn++; } /*For each xstat_cm connection*/ /* * All (valid) connections have been probed. Fall asleep for the * prescribed number of seconds, unless we're a one-shot. In * that case, we need to signal our caller that we're done. */ if (xstat_cm_debug) printf("[%s] Polling complete for probe round %d.\n", rn, xstat_cm_Results.probeNum); if (xstat_cm_oneShot) { /* * One-shot execution desired. Signal our main procedure * that we've finished our collection round. */ if (xstat_cm_debug) printf("[%s] Signalling main process at 0x%x\n", rn, &terminationEvent); oneShotCode = LWP_SignalProcess(&terminationEvent); if (oneShotCode) fprintf(stderr, "[%s] Error %d from LWP_SignalProcess()", rn, oneShotCode); break; /*from the perpetual while loop*/ } /*One-shot execution*/ else { /* * Continuous execution desired. Sleep for the required * number of seconds. */ tv.tv_sec = xstat_cm_ProbeFreqInSecs; tv.tv_usec = 0; if (xstat_cm_debug) printf("[%s] Falling asleep for %d seconds\n", rn, xstat_cm_ProbeFreqInSecs); code = IOMGR_Select(0, /*Num fids*/ 0, /*Descs ready for reading*/ 0, /*Descs ready for writing*/ 0, /*Descs w/exceptional conditions*/ &tv); /*Ptr to timeout structure*/ if (code) fprintf(stderr, "[%s] IOMGR_Select returned code %d\n", rn, code); } /*Continuous execution*/ } /*Service loop*/ } /*xstat_cm_LWP*/ /*------------------------------------------------------------------------ * [exported] xstat_cm_Init * * Description: * Initialize the xstat_cm module: set up Rx connections to the * given set of Cache Managers, start up the probe LWP, and * associate the routine to be called when a probe completes. * Also, let it know which collections you're interested in. * * Arguments: * int a_numServers : Num. servers to connect to. * struct sockaddr_in *a_socketArray : Array of server sockets. * int a_ProbeFreqInSecs : Probe frequency in seconds. * int (*a_ProbeHandler)() : Ptr to probe handler fcn. * int a_flags; : Various flags. * int a_numCollections : Number of collections desired. * afs_int32 *a_collIDP : Ptr to collection IDs. * * Returns: * 0 on success, * -2 for (at least one) connection error, * LWP process creation code, if it failed, * -1 for other fatal errors. * * Environment: * *** MUST BE THE FIRST ROUTINE CALLED FROM THIS PACKAGE *** * * Side Effects: * Sets up just about everything. *------------------------------------------------------------------------*/ int xstat_cm_Init(a_numServers, a_socketArray, a_ProbeFreqInSecs, a_ProbeHandler, a_flags, a_numCollections, a_collIDP) int a_numServers; struct sockaddr_in *a_socketArray; int a_ProbeFreqInSecs; int (*a_ProbeHandler)(); int a_flags; int a_numCollections; afs_int32 *a_collIDP; { /*xstat_cm_Init*/ static char rn[] = "xstat_cm_Init"; /*Routine name*/ register afs_int32 code; /*Return value*/ struct rx_securityClass *secobj; /*Client security object*/ int arg_errfound; /*Argument error found?*/ int curr_srv; /*Current server idx*/ struct xstat_cm_ConnectionInfo *curr_conn; /*Ptr to current conn*/ char *hostNameFound; /*Ptr to returned host name*/ int conn_err; /*Connection error?*/ int collIDBytes; /*Num bytes in coll ID array*/ /* * If we've already been called, snicker at the bozo, gently * remind him of his doubtful heritage, and return success. */ if (xstat_cm_initflag) { fprintf(stderr, "[%s] Called multiple times!\n", rn); return(0); } else xstat_cm_initflag = 1; /* * Check the parameters for bogosities. */ arg_errfound = 0; if (a_numServers <= 0) { fprintf(stderr, "[%s] Illegal number of servers: %d\n", rn, a_numServers); arg_errfound = 1; } if (a_socketArray == (struct sockaddr_in *)0) { fprintf(stderr, "[%s] Null server socket array argument\n", rn); arg_errfound = 1; } if (a_ProbeFreqInSecs <= 0) { fprintf(stderr, "[%s] Illegal probe frequency: %d\n", rn, a_ProbeFreqInSecs); arg_errfound = 1; } if (a_ProbeHandler == (int (*)())0) { fprintf(stderr, "[%s] Null probe handler function argument\n", rn); arg_errfound = 1; } if (a_numCollections <= 0) { fprintf(stderr, "[%s] Illegal collection count argument: %d\n", rn, a_numServers); arg_errfound = 1; } if (a_collIDP == (afs_int32 *)0) { fprintf(stderr, "[%s] Null collection ID array argument\n", rn); arg_errfound = 1; } if (arg_errfound) return(-1); /* * Record our passed-in info. */ xstat_cm_debug = (a_flags & XSTAT_CM_INITFLAG_DEBUGGING); xstat_cm_oneShot = (a_flags & XSTAT_CM_INITFLAG_ONE_SHOT); xstat_cm_numServers = a_numServers; xstat_cm_Handler = a_ProbeHandler; xstat_cm_ProbeFreqInSecs = a_ProbeFreqInSecs; xstat_cm_numCollections = a_numCollections; collIDBytes = xstat_cm_numCollections * sizeof(afs_int32); xstat_cm_collIDP = (afs_int32 *)(malloc(collIDBytes)); bcopy(a_collIDP, xstat_cm_collIDP, collIDBytes); if (xstat_cm_debug) { printf("[%s] Asking for %d collection(s): ", rn, xstat_cm_numCollections); for (curr_srv = 0; curr_srv < xstat_cm_numCollections; curr_srv++) printf("%d ", *(xstat_cm_collIDP+curr_srv)); printf("\n"); } /* * Get ready in case we have to do a cleanup - basically, zero * everything out. */ code = xstat_cm_CleanupInit(); if (code) return(code); /* * Allocate the necessary data structures and initialize everything * else. */ xstat_cm_ConnInfo = (struct xstat_cm_ConnectionInfo *) malloc(a_numServers * sizeof(struct xstat_cm_ConnectionInfo)); if (xstat_cm_ConnInfo == (struct xstat_cm_ConnectionInfo *)0) { fprintf(stderr, "[%s] Can't allocate %d connection info structs (%d bytes)\n", rn, a_numServers, (a_numServers * sizeof(struct xstat_cm_ConnectionInfo))); return(-1); /*No cleanup needs to be done yet*/ } /* * Initialize the Rx subsystem, just in case nobody's done it. */ if (xstat_cm_debug) printf("[%s] Initializing Rx on port 0\n", rn); code = rx_Init(htons(0)); if (code) { fprintf(stderr, "[%s] Fatal error in rx_Init(), error=%d\n", rn, code); return(-1); } if (xstat_cm_debug) printf("[%s] Rx initialized on port 0\n", rn); /* * Create a null Rx client security object, to be used by the * probe LWP. */ secobj = (struct rx_securityClass *) rxnull_NewClientSecurityObject(); if (secobj == (struct rx_securityClass *)0) { fprintf(stderr, "[%s] Can't create probe LWP client security object.\n", rn); xstat_cm_Cleanup(1); /*Delete already-malloc'ed areas*/ return(-1); } if (xstat_cm_debug) printf("[%s] Probe LWP client security object created\n", rn); curr_conn = xstat_cm_ConnInfo; conn_err = 0; for (curr_srv = 0; curr_srv < a_numServers; curr_srv++) { /* * Copy in the socket info for the current server, resolve its * printable name if possible. */ if (xstat_cm_debug) { printf("[%s] Copying in the following socket info:\n", rn); printf("[%s] IP addr 0x%lx, port %d\n", rn, (a_socketArray + curr_srv)->sin_addr.s_addr, (a_socketArray + curr_srv)->sin_port); } bcopy(a_socketArray + curr_srv, &(curr_conn->skt), sizeof(struct sockaddr_in)); hostNameFound = hostutil_GetNameByINet(curr_conn->skt.sin_addr.s_addr); if (hostNameFound == (char *)0) { fprintf(stderr, "[%s] Can't map Internet address %lu to a string name\n", rn, curr_conn->skt.sin_addr.s_addr); curr_conn->hostName[0] = '\0'; } else { strcpy(curr_conn->hostName, hostNameFound); if (xstat_cm_debug) printf("[%s] Host name for server index %d is %s\n", rn, curr_srv, curr_conn->hostName); } /* * Make an Rx connection to the current server. */ if (xstat_cm_debug) printf("[%s] Connecting to srv idx %d, IP addr 0x%lx, port %d, service 1\n", rn, curr_srv, curr_conn->skt.sin_addr.s_addr, curr_conn->skt.sin_port); curr_conn->rxconn = rx_NewConnection(curr_conn->skt.sin_addr.s_addr, /*Server addr*/ curr_conn->skt.sin_port, /*Server port*/ 1, /*AFS service #*/ secobj, /*Security obj*/ 0); /*# of above*/ if (curr_conn->rxconn == (struct rx_connection *)0) { fprintf(stderr, "[%s] Can't create Rx connection to server '%s' (%lu)\n", rn, curr_conn->hostName, curr_conn->skt.sin_addr.s_addr); conn_err = 1; } if (xstat_cm_debug) printf("[%s] New connection at 0x%lx\n", rn, curr_conn->rxconn); /* * Bump the current xstat_cm connection to set up. */ curr_conn++; } /*for curr_srv*/ /* * Start up the probe LWP. */ if (xstat_cm_debug) printf("[%s] Creating the probe LWP\n", rn); code = LWP_CreateProcess(xstat_cm_LWP, /*Function to start up*/ LWP_STACK_SIZE, /*Stack size in bytes*/ 1, /*Priority*/ 0, /*Parameters*/ "xstat_cm Worker", /*Name to use*/ &probeLWP_ID); /*Returned LWP process ID*/ if (code) { fprintf(stderr, "[%s] Can't create xstat_cm LWP! Error is %d\n", rn, code); xstat_cm_Cleanup(1); /*Delete already-malloc'ed areas*/ return(code); } if (xstat_cm_debug) printf("[%s] Probe LWP process structure located at 0x%x\n", rn, probeLWP_ID); /* * Return the final results. */ if (conn_err) return(-2); else return(0); } /*xstat_cm_Init*/ /*------------------------------------------------------------------------ * [exported] xstat_cm_ForceProbeNow * * Description: * Wake up the probe LWP, forcing it to execute a probe immediately. * * Arguments: * None. * * Returns: * 0 on success, * Error value otherwise. * * Environment: * The module must have been initialized. * * Side Effects: * As advertised. *------------------------------------------------------------------------*/ int xstat_cm_ForceProbeNow() { /*xstat_cm_ForceProbeNow*/ static char rn[] = "xstat_cm_ForceProbeNow"; /*Routine name*/ /* * There isn't a prayer unless we've been initialized. */ if (!xstat_cm_initflag) { fprintf(stderr, "[%s] Must call xstat_cm_Init first!\n", rn); return(-1); } /* * Kick the sucker in the side. */ IOMGR_Cancel(probeLWP_ID); /* * We did it, so report the happy news. */ return(0); } /*xstat_cm_ForceProbeNow*/