#include <afs/param.h>
#include <afs/stds.h>
-#ifndef DJGPP
#include <windows.h>
#include <winsock2.h>
#include <nb30.h>
-#else
-#include <sys/socket.h>
-#endif /* !DJGPP */
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
+#include "afsd.h"
#include <osi.h>
#include <rx/rx.h>
-#include "afsd.h"
osi_rwlock_t cm_serverLock;
cm_server_t *cm_allServersp;
-int cm_noIPAddr; /* number of client network interfaces */
-int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
-int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
-int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
-int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
+void
+cm_ForceNewConnectionsAllServers(void)
+{
+ cm_server_t *tsp;
-void cm_CheckServers(long flags, cm_cell_t *cellp)
+ lock_ObtainRead(&cm_serverLock);
+ for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
+ cm_GetServerNoLock(tsp);
+ cm_ForceNewConnections(tsp);
+ cm_PutServerNoLock(tsp);
+ }
+ lock_ReleaseRead(&cm_serverLock);
+}
+
+void
+cm_PingServer(cm_server_t *tsp)
{
- /* ping all file servers, up or down, with unauthenticated connection,
- * to find out whether we have all our callbacks from the server still.
- * Also, ping down VLDBs.
- */
- cm_server_t *tsp;
- long code;
- long secs;
- long usecs;
- int doPing;
- int serverType;
- long now;
- int wasDown;
- cm_conn_t *connp;
+ long code;
+ int wasDown = 0;
+ cm_conn_t *connp;
+ struct rx_connection * rxconnp;
+ long secs;
+ long usecs;
+ Capabilities caps = {0, 0};
+ char hoststr[16];
+ cm_req_t req;
+
+ lock_ObtainMutex(&tsp->mx);
+ if (tsp->flags & CM_SERVERFLAG_PINGING) {
+ tsp->waitCount++;
+ osi_SleepM((LONG_PTR)tsp, &tsp->mx);
+ lock_ObtainMutex(&tsp->mx);
+ tsp->waitCount--;
+ if (tsp->waitCount == 0)
+ tsp->flags &= ~CM_SERVERFLAG_PINGING;
+ else
+ osi_Wakeup((LONG_PTR)tsp);
+ lock_ReleaseMutex(&tsp->mx);
+ return;
+ }
+ tsp->flags |= CM_SERVERFLAG_PINGING;
+ wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
+ afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
+ lock_ReleaseMutex(&tsp->mx);
+
+ code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
+ if (code == 0) {
+ /* now call the appropriate ping call. Drop the timeout if
+ * the server is known to be down, so that we don't waste a
+ * lot of time retiming out down servers.
+ */
+
+ osi_Log4(afsd_logp, "cm_PingServer server %s (%s) was %s with caps 0x%x",
+ osi_LogSaveString(afsd_logp, hoststr),
+ tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
+ wasDown ? "down" : "up",
+ tsp->capabilities);
+
+ if (wasDown)
+ rx_SetConnDeadTime(connp->callp, 10);
+ if (tsp->type == CM_SERVER_VLDB) {
+ code = VL_ProbeServer(connp->callp);
+ }
+ else {
+ /* file server */
+ rxconnp = cm_GetRxConn(connp);
+ code = RXAFS_GetCapabilities(rxconnp, &caps);
+ if (code == RXGEN_OPCODE)
+ code = RXAFS_GetTime(rxconnp, &secs, &usecs);
+ rx_PutConnection(rxconnp);
+ }
+ if (wasDown)
+ rx_SetConnDeadTime(connp->callp, ConnDeadtimeout);
+ cm_PutConn(connp);
+ } /* got an unauthenticated connection to this server */
+
+ lock_ObtainMutex(&tsp->mx);
+ if (code >= 0) {
+ /* mark server as up */
+ tsp->flags &= ~CM_SERVERFLAG_DOWN;
+
+ /* we currently handle 32-bits of capabilities */
+ if (caps.Capabilities_len > 0) {
+ tsp->capabilities = caps.Capabilities_val[0];
+ free(caps.Capabilities_val);
+ caps.Capabilities_len = 0;
+ caps.Capabilities_val = 0;
+ } else {
+ tsp->capabilities = 0;
+ }
- lock_ObtainWrite(&cm_serverLock);
- for(tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
- tsp->refCount++;
- lock_ReleaseWrite(&cm_serverLock);
-
- /* now process the server */
- lock_ObtainMutex(&tsp->mx);
-
- /* what time is it? */
- now = osi_Time();
-
- serverType = tsp->type;
- doPing = 0;
- wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
-
- /* only do the ping if the cell matches the requested cell, or we're
- * matching all cells (cellp == NULL), and if we've requested to ping
- * this type of {up, down} servers.
- */
- if ((cellp == NULL || cellp == tsp->cellp) &&
- ((wasDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
- (!wasDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
-
- doPing = 1;
- } /* we're supposed to check this up/down server */
- lock_ReleaseMutex(&tsp->mx);
-
- /* at this point, we've adjusted the server state, so do the ping and
- * adjust things.
- */
- if (doPing) {
- code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
+ osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is up with caps 0x%x",
+ osi_LogSaveString(afsd_logp, hoststr),
+ tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
+ tsp->capabilities);
+
+ /* Now update the volume status if necessary */
+ if (wasDown) {
+ cm_server_vols_t * tsrvp;
+ cm_volume_t * volp;
+ int i;
+
+ lock_ReleaseMutex(&tsp->mx);
+ for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
+ for (i=0; i<NUM_SERVER_VOLS; i++) {
+ if (tsrvp->ids[i] != 0) {
+ cm_InitReq(&req);
+
+ code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
+ &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
if (code == 0) {
- /* now call the appropriate ping call. Drop the timeout if
- * the server is known to be down, so that we don't waste a
- * lot of time retiming out down servers.
- */
- if (wasDown)
- rx_SetConnDeadTime(connp->callp, 10);
- if (serverType == CM_SERVER_VLDB) {
- code = VL_ProbeServer(connp->callp);
- }
- else {
- /* file server */
- code = RXAFS_GetTime(connp->callp, &secs, &usecs);
- }
- if (wasDown)
- rx_SetConnDeadTime(connp->callp, ConnDeadtimeout);
- cm_PutConn(connp);
- } /* got an unauthenticated connection to this server */
-
- lock_ObtainMutex(&tsp->mx);
- if (code == 0) {
- /* mark server as up */
- tsp->flags &= ~CM_SERVERFLAG_DOWN;
+ cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
+ cm_PutVolume(volp);
}
- else {
- /* mark server as down */
- tsp->flags |= CM_SERVERFLAG_DOWN;
- }
- lock_ReleaseMutex(&tsp->mx);
+ }
}
-
- /* also, run the GC function for connections on all of the
- * server's connections.
- */
- cm_GCConnections(tsp);
-
- lock_ObtainWrite(&cm_serverLock);
- osi_assert(tsp->refCount-- > 0);
+ }
+ lock_ObtainMutex(&tsp->mx);
}
- lock_ReleaseWrite(&cm_serverLock);
+ } else {
+ /* mark server as down */
+ tsp->flags |= CM_SERVERFLAG_DOWN;
+ if (code != VRESTARTING)
+ cm_ForceNewConnections(tsp);
+
+ osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is down with caps 0x%x",
+ osi_LogSaveString(afsd_logp, hoststr),
+ tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
+ tsp->capabilities);
+
+ /* Now update the volume status if necessary */
+ if (!wasDown) {
+ cm_server_vols_t * tsrvp;
+ cm_volume_t * volp;
+ int i;
+
+ lock_ReleaseMutex(&tsp->mx);
+ for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
+ for (i=0; i<NUM_SERVER_VOLS; i++) {
+ if (tsrvp->ids[i] != 0) {
+ cm_InitReq(&req);
+
+ code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
+ &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
+ if (code == 0) {
+ cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
+ cm_PutVolume(volp);
+ }
+ }
+ }
+ }
+ lock_ObtainMutex(&tsp->mx);
+ }
+ }
+
+ if (tsp->waitCount == 0)
+ tsp->flags &= ~CM_SERVERFLAG_PINGING;
+ else
+ osi_Wakeup((LONG_PTR)tsp);
+ lock_ReleaseMutex(&tsp->mx);
}
+
+void cm_CheckServers(long flags, cm_cell_t *cellp)
+{
+ /* ping all file servers, up or down, with unauthenticated connection,
+ * to find out whether we have all our callbacks from the server still.
+ * Also, ping down VLDBs.
+ */
+ cm_server_t *tsp;
+ int doPing;
+ int isDown;
+ int isFS;
+
+ lock_ObtainWrite(&cm_serverLock);
+ for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
+ cm_GetServerNoLock(tsp);
+ lock_ReleaseWrite(&cm_serverLock);
+
+ /* now process the server */
+ lock_ObtainMutex(&tsp->mx);
+
+ doPing = 0;
+ isDown = tsp->flags & CM_SERVERFLAG_DOWN;
+ isFS = tsp->type == CM_SERVER_FILE;
+
+ /* only do the ping if the cell matches the requested cell, or we're
+ * matching all cells (cellp == NULL), and if we've requested to ping
+ * this type of {up, down} servers.
+ */
+ if ((cellp == NULL || cellp == tsp->cellp) &&
+ ((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
+ (!isDown && (flags & CM_FLAG_CHECKUPSERVERS))) &&
+ ((!(flags & CM_FLAG_CHECKVLDBSERVERS) ||
+ !isFS && (flags & CM_FLAG_CHECKVLDBSERVERS)) &&
+ (!(flags & CM_FLAG_CHECKFILESERVERS) ||
+ isFS && (flags & CM_FLAG_CHECKFILESERVERS)))) {
+ doPing = 1;
+ } /* we're supposed to check this up/down server */
+ lock_ReleaseMutex(&tsp->mx);
+
+ /* at this point, we've adjusted the server state, so do the ping and
+ * adjust things.
+ */
+ if (doPing)
+ cm_PingServer(tsp);
+
+ /* also, run the GC function for connections on all of the
+ * server's connections.
+ */
+ cm_GCConnections(tsp);
+
+ lock_ObtainWrite(&cm_serverLock);
+ cm_PutServerNoLock(tsp);
+ }
+ lock_ReleaseWrite(&cm_serverLock);
+}
+
void cm_InitServer(void)
{
- static osi_once_t once;
+ static osi_once_t once;
- if (osi_Once(&once)) {
- lock_InitializeRWLock(&cm_serverLock, "cm_serverLock");
- osi_EndOnce(&once);
- }
+ if (osi_Once(&once)) {
+ lock_InitializeRWLock(&cm_serverLock, "cm_serverLock");
+ osi_EndOnce(&once);
+ }
+}
+
+void cm_GetServer(cm_server_t *serverp)
+{
+ lock_ObtainWrite(&cm_serverLock);
+ serverp->refCount++;
+ lock_ReleaseWrite(&cm_serverLock);
+}
+
+void cm_GetServerNoLock(cm_server_t *serverp)
+{
+ serverp->refCount++;
}
void cm_PutServer(cm_server_t *serverp)
{
- lock_ObtainWrite(&cm_serverLock);
- osi_assert(serverp->refCount-- > 0);
- lock_ReleaseWrite(&cm_serverLock);
+ lock_ObtainWrite(&cm_serverLock);
+ osi_assert(serverp->refCount-- > 0);
+ lock_ReleaseWrite(&cm_serverLock);
}
-void cm_SetServerPrefs(cm_server_t * serverp)
+void cm_PutServerNoLock(cm_server_t *serverp)
{
- unsigned long serverAddr; /* in host byte order */
- unsigned long myAddr, myNet, mySubnet;/* in host byte order */
- unsigned long netMask;
- int i;
+ osi_assert(serverp->refCount-- > 0);
+}
- /* implement server prefs for fileservers only */
- if ( serverp->type == CM_SERVER_FILE )
- {
- serverAddr = ntohl(serverp->addr.sin_addr.s_addr);
- serverp->ipRank = CM_IPRANK_LOW; /* default setings */
+void cm_SetServerNo64Bit(cm_server_t * serverp, int no64bit)
+{
+ lock_ObtainMutex(&serverp->mx);
+ if (no64bit)
+ serverp->flags |= CM_SERVERFLAG_NO64BIT;
+ else
+ serverp->flags &= ~CM_SERVERFLAG_NO64BIT;
+ lock_ReleaseMutex(&serverp->mx);
+}
- for ( i=0; i < cm_noIPAddr; i++)
+void cm_SetServerNoInlineBulk(cm_server_t * serverp, int no)
+{
+ lock_ObtainMutex(&serverp->mx);
+ if (no)
+ serverp->flags |= CM_SERVERFLAG_NOINLINEBULK;
+ else
+ serverp->flags &= ~CM_SERVERFLAG_NOINLINEBULK;
+ lock_ReleaseMutex(&serverp->mx);
+}
+
+void cm_SetServerPrefs(cm_server_t * serverp)
+{
+ unsigned long serverAddr; /* in host byte order */
+ unsigned long myAddr, myNet, mySubnet;/* in host byte order */
+ unsigned long netMask;
+ int i;
+
+ int cm_noIPAddr; /* number of client network interfaces */
+ int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
+ int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
+ int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
+ int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
+ long code;
+
+ /* get network related info */
+ cm_noIPAddr = CM_MAXINTERFACE_ADDR;
+ code = syscfg_GetIFInfo(&cm_noIPAddr,
+ cm_IPAddr, cm_SubnetMask,
+ cm_NetMtu, cm_NetFlags);
+
+ serverAddr = ntohl(serverp->addr.sin_addr.s_addr);
+ serverp->ipRank = CM_IPRANK_LOW; /* default setings */
+
+ for ( i=0; i < cm_noIPAddr; i++)
+ {
+ /* loop through all the client's IP address and compare
+ ** each of them against the server's IP address */
+
+ myAddr = cm_IPAddr[i];
+ if ( IN_CLASSA(myAddr) )
+ netMask = IN_CLASSA_NET;
+ else if ( IN_CLASSB(myAddr) )
+ netMask = IN_CLASSB_NET;
+ else if ( IN_CLASSC(myAddr) )
+ netMask = IN_CLASSC_NET;
+ else
+ netMask = 0;
+
+ myNet = myAddr & netMask;
+ mySubnet = myAddr & cm_SubnetMask[i];
+
+ if ( (serverAddr & netMask) == myNet )
+ {
+ if ( (serverAddr & cm_SubnetMask[i]) == mySubnet)
{
- /* loop through all the client's IP address and compare
- ** each of them against the server's IP address */
-
- myAddr = cm_IPAddr[i];
- if ( IN_CLASSA(myAddr) )
- netMask = IN_CLASSA_NET;
- else if ( IN_CLASSB(myAddr) )
- netMask = IN_CLASSB_NET;
- else if ( IN_CLASSC(myAddr) )
- netMask = IN_CLASSC_NET;
- else
- netMask = 0;
-
- myNet = myAddr & netMask;
- mySubnet = myAddr & cm_SubnetMask[i];
-
- if ( (serverAddr & netMask) == myNet )
- {
- if ( (serverAddr & cm_SubnetMask[i]) == mySubnet)
- {
- if ( serverAddr == myAddr )
- serverp->ipRank = min(serverp->ipRank,
- CM_IPRANK_TOP);/* same machine */
- else serverp->ipRank = min(serverp->ipRank,
- CM_IPRANK_HI); /* same subnet */
- }
- else serverp->ipRank = min(serverp->ipRank,CM_IPRANK_MED);
- /* same net */
- }
- /* random between 0..15*/
- serverp->ipRank += min(serverp->ipRank, rand() % 0x000f);
- } /* and of for loop */
- }
- else serverp->ipRank = 10000 + (rand() % 0x00ff); /* VL server */
+ if ( serverAddr == myAddr )
+ serverp->ipRank = min(serverp->ipRank,
+ CM_IPRANK_TOP);/* same machine */
+ else serverp->ipRank = min(serverp->ipRank,
+ CM_IPRANK_HI); /* same subnet */
+ }
+ else serverp->ipRank = min(serverp->ipRank,CM_IPRANK_MED);
+ /* same net */
+ }
+ /* random between 0..15*/
+ serverp->ipRank += min(serverp->ipRank, rand() % 0x000f);
+ } /* and of for loop */
}
cm_server_t *cm_NewServer(struct sockaddr_in *socketp, int type, cm_cell_t *cellp) {
- cm_server_t *tsp;
+ cm_server_t *tsp;
- osi_assert(socketp->sin_family == AF_INET);
+ osi_assert(socketp->sin_family == AF_INET);
- tsp = malloc(sizeof(*tsp));
- memset(tsp, 0, sizeof(*tsp));
- tsp->type = type;
- tsp->cellp = cellp;
- tsp->refCount = 1;
- lock_InitializeMutex(&tsp->mx, "cm_server_t mutex");
- tsp->addr = *socketp;
+ tsp = malloc(sizeof(*tsp));
+ if (tsp) {
+ memset(tsp, 0, sizeof(*tsp));
+ tsp->type = type;
+ tsp->cellp = cellp;
+ tsp->refCount = 1;
+ lock_InitializeMutex(&tsp->mx, "cm_server_t mutex");
+ tsp->addr = *socketp;
+ tsp->flags = CM_SERVERFLAG_DOWN; /* assume down; ping will mark up if available */
- cm_SetServerPrefs(tsp);
+ cm_SetServerPrefs(tsp);
- lock_ObtainWrite(&cm_serverLock); /* get server lock */
- tsp->allNextp = cm_allServersp;
- cm_allServersp = tsp;
- lock_ReleaseWrite(&cm_serverLock); /* release server lock */
+ lock_ObtainWrite(&cm_serverLock); /* get server lock */
+ tsp->allNextp = cm_allServersp;
+ cm_allServersp = tsp;
+ lock_ReleaseWrite(&cm_serverLock); /* release server lock */
+ cm_PingServer(tsp); /* Obtain Capabilities and check up/down state */
+ }
return tsp;
}
/* find a server based on its properties */
cm_server_t *cm_FindServer(struct sockaddr_in *addrp, int type)
{
- cm_server_t *tsp;
+ cm_server_t *tsp;
- osi_assert(addrp->sin_family == AF_INET);
+ osi_assert(addrp->sin_family == AF_INET);
- lock_ObtainWrite(&cm_serverLock);
- for(tsp = cm_allServersp; tsp; tsp=tsp->allNextp) {
- if (tsp->type == type &&
- tsp->addr.sin_addr.s_addr == addrp->sin_addr.s_addr) break;
- }
+ lock_ObtainWrite(&cm_serverLock);
+ for (tsp = cm_allServersp; tsp; tsp=tsp->allNextp) {
+ if (tsp->type == type &&
+ tsp->addr.sin_addr.s_addr == addrp->sin_addr.s_addr)
+ break;
+ }
- /* bump ref count if we found the server */
- if (tsp) tsp->refCount++;
+ /* bump ref count if we found the server */
+ if (tsp)
+ cm_GetServerNoLock(tsp);
- /* drop big table lock */
- lock_ReleaseWrite(&cm_serverLock);
+ /* drop big table lock */
+ lock_ReleaseWrite(&cm_serverLock);
- /* return what we found */
- return tsp;
+ /* return what we found */
+ return tsp;
+}
+
+cm_server_vols_t *cm_NewServerVols(void) {
+ cm_server_vols_t *tsvp;
+
+ tsvp = malloc(sizeof(*tsvp));
+ if (tsvp)
+ memset(tsvp, 0, sizeof(*tsvp));
+
+ return tsvp;
}
-cm_serverRef_t *cm_NewServerRef(cm_server_t *serverp)
+cm_serverRef_t *cm_NewServerRef(cm_server_t *serverp, afs_uint32 volID)
{
- cm_serverRef_t *tsrp;
+ cm_serverRef_t *tsrp;
+ cm_server_vols_t **tsrvpp = NULL;
+ afs_uint32 *slotp = NULL;
+ int found = 0;
+
+ cm_GetServer(serverp);
+ tsrp = malloc(sizeof(*tsrp));
+ tsrp->server = serverp;
+ tsrp->status = srv_not_busy;
+ tsrp->next = NULL;
+ tsrp->volID = volID;
+ tsrp->refCount = 1;
+
+ /* if we have a non-zero volID, we need to add it to the list
+ * of volumes maintained by the server. There are two phases:
+ * (1) see if the volID is already in the list and (2) insert
+ * it into the first empty slot if it is not.
+ */
+ if (volID) {
+ lock_ObtainMutex(&serverp->mx);
+
+ tsrvpp = &serverp->vols;
+ while (*tsrvpp) {
+ int i;
+
+ for (i=0; i<NUM_SERVER_VOLS; i++) {
+ if ((*tsrvpp)->ids[i] == volID) {
+ found = 1;
+ break;
+ } else if (!slotp && (*tsrvpp)->ids[i] == 0) {
+ slotp = &(*tsrvpp)->ids[i];
+ }
+ }
- lock_ObtainWrite(&cm_serverLock);
- serverp->refCount++;
- lock_ReleaseWrite(&cm_serverLock);
- tsrp = malloc(sizeof(*tsrp));
- tsrp->server = serverp;
- tsrp->status = not_busy;
- tsrp->next = NULL;
+ if (found)
+ break;
- return tsrp;
+ tsrvpp = &(*tsrvpp)->nextp;
+ }
+
+ if (!found) {
+ if (slotp) {
+ *slotp = volID;
+ } else {
+ /* if we didn't find an empty slot in a current
+ * page we must need a new page */
+ *tsrvpp = cm_NewServerVols();
+ if (*tsrvpp)
+ (*tsrvpp)->ids[0] = volID;
+ }
+ }
+
+ lock_ReleaseMutex(&serverp->mx);
+ }
+
+ return tsrp;
}
-long cm_ChecksumServerList(cm_serverRef_t *serversp)
+LONG_PTR cm_ChecksumServerList(cm_serverRef_t *serversp)
{
- long sum = 0;
- int first = 1;
- cm_serverRef_t *tsrp;
+ LONG_PTR sum = 0;
+ int first = 1;
+ cm_serverRef_t *tsrp;
lock_ObtainWrite(&cm_serverLock);
-
- for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
- if (first)
- first = 0;
- else
- sum <<= 1;
- sum ^= (long) tsrp->server;
- }
+ for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
+ if (first)
+ first = 0;
+ else
+ sum <<= 1;
+ sum ^= (LONG_PTR) tsrp->server;
+ }
lock_ReleaseWrite(&cm_serverLock);
- return sum;
+ return sum;
}
/*
** Insert a server into the server list keeping the list sorted in
** asending order of ipRank.
+**
+** The refCount of the cm_serverRef_t is increased
*/
void cm_InsertServerList(cm_serverRef_t** list, cm_serverRef_t* element)
{
- cm_serverRef_t *current=*list;
- unsigned short ipRank = element->server->ipRank;
+ cm_serverRef_t *current=*list;
+ unsigned short ipRank = element->server->ipRank;
lock_ObtainWrite(&cm_serverLock);
+ element->refCount++; /* increase refCount */
- /* insertion into empty list or at the beginning of the list */
- if ( !current || (current->server->ipRank > ipRank) )
- {
- element->next = *list;
- *list = element;
+ /* insertion into empty list or at the beginning of the list */
+ if ( !current || (current->server->ipRank > ipRank) )
+ {
+ element->next = *list;
+ *list = element;
lock_ReleaseWrite(&cm_serverLock);
- return ;
- }
+ return ;
+ }
- while ( current->next ) /* find appropriate place to insert */
- {
- if ( current->next->server->ipRank > ipRank )
- break;
- else current = current->next;
- }
- element->next = current->next;
- current->next = element;
+ while ( current->next ) /* find appropriate place to insert */
+ {
+ if ( current->next->server->ipRank > ipRank )
+ break;
+ else current = current->next;
+ }
+ element->next = current->next;
+ current->next = element;
lock_ReleaseWrite(&cm_serverLock);
-}
+}
/*
** Re-sort the server list with the modified rank
** returns 0 if element was changed successfully.
*/
long cm_ChangeRankServer(cm_serverRef_t** list, cm_server_t* server)
{
- cm_serverRef_t **current=list;
- cm_serverRef_t *element=0;
+ cm_serverRef_t **current=list;
+ cm_serverRef_t *element=0;
- /* if there is max of one element in the list, nothing to sort */
- if ( (!*current) || !((*current)->next) )
- return 1; /* list unchanged: return success */
+ /* if there is max of one element in the list, nothing to sort */
+ if ( (!*current) || !((*current)->next) )
+ return 1; /* list unchanged: return success */
lock_ObtainWrite(&cm_serverLock);
- /* if the server is on the list, delete it from list */
- while ( *current )
- {
- if ( (*current)->server == server)
- {
- element = (*current);
- *current = (*current)->next; /* delete it */
- break;
- }
- current = & ( (*current)->next);
- }
+ /* if the server is on the list, delete it from list */
+ while ( *current )
+ {
+ if ( (*current)->server == server)
+ {
+ element = (*current);
+ *current = (*current)->next; /* delete it */
+ break;
+ }
+ current = & ( (*current)->next);
+ }
lock_ReleaseWrite(&cm_serverLock);
/* if this volume is not replicated on this server */
- if (!element)
- return 1; /* server is not on list */
+ if (!element)
+ return 1; /* server is not on list */
+
+ /* re-insert deleted element into the list with modified rank*/
+ cm_InsertServerList(list, element);
- /* re-insert deleted element into the list with modified rank*/
- cm_InsertServerList(list, element);
- return 0;
+ /* reduce refCount which was increased by cm_InsertServerList */
+ lock_ObtainWrite(&cm_serverLock);
+ element->refCount--;
+ lock_ReleaseWrite(&cm_serverLock);
+ return 0;
}
/*
** If there are more than one server on the list and the first n servers on
*/
void cm_RandomizeServer(cm_serverRef_t** list)
{
- int count, picked;
- cm_serverRef_t* tsrp = *list, *lastTsrp;
- unsigned short lowestRank;
+ int count, picked;
+ cm_serverRef_t* tsrp = *list, *lastTsrp;
+ unsigned short lowestRank;
- /* an empty list or a list with only one element */
- if ( !tsrp || ! tsrp->next )
- return ;
+ /* an empty list or a list with only one element */
+ if ( !tsrp || ! tsrp->next )
+ return ;
lock_ObtainWrite(&cm_serverLock);
- /* count the number of servers with the lowest rank */
- lowestRank = tsrp->server->ipRank;
- for ( count=1, tsrp=tsrp->next; tsrp; tsrp=tsrp->next)
- {
- if ( tsrp->server->ipRank != lowestRank)
- break;
- else
- count++;
- }
-
- /* if there is only one server with the lowest rank, we are done */
- if ( count <= 1 ) {
+ /* count the number of servers with the lowest rank */
+ lowestRank = tsrp->server->ipRank;
+ for ( count=1, tsrp=tsrp->next; tsrp; tsrp=tsrp->next)
+ {
+ if ( tsrp->server->ipRank != lowestRank)
+ break;
+ else
+ count++;
+ }
+
+ /* if there is only one server with the lowest rank, we are done */
+ if ( count <= 1 ) {
lock_ReleaseWrite(&cm_serverLock);
- return ;
- }
+ return ;
+ }
- picked = rand() % count;
- if ( !picked ) {
+ picked = rand() % count;
+ if ( !picked ) {
lock_ReleaseWrite(&cm_serverLock);
- return ;
- }
+ return ;
+ }
- tsrp = *list;
- while (--picked >= 0)
- {
- lastTsrp = tsrp;
- tsrp = tsrp->next;
- }
- lastTsrp->next = tsrp->next; /* delete random element from list*/
- tsrp->next = *list; /* insert element at the beginning of list */
- *list = tsrp;
+ tsrp = *list;
+ while (--picked >= 0)
+ {
+ lastTsrp = tsrp;
+ tsrp = tsrp->next;
+ }
+ lastTsrp->next = tsrp->next; /* delete random element from list*/
+ tsrp->next = *list; /* insert element at the beginning of list */
+ *list = tsrp;
lock_ReleaseWrite(&cm_serverLock);
-}
+}
/* call cm_FreeServer while holding a write lock on cm_serverLock */
-void cm_FreeServer(cm_server_t* server)
+void cm_FreeServer(cm_server_t* serverp)
{
- if (--(server->refCount) == 0)
+ cm_server_vols_t * tsrvp, *nextp;
+
+ cm_PutServerNoLock(serverp);
+ if (serverp->refCount == 0)
{
/* we need to check to ensure that all of the connections
* for this server have a 0 refCount; otherwise, they will
* not be garbage collected
*/
- cm_GCConnections(&server); /* connsp */
+ cm_GCConnections(serverp); /* connsp */
+
+ if (!(serverp->flags & CM_SERVERFLAG_PREF_SET)) {
+ lock_FinalizeMutex(&serverp->mx);
+ if ( cm_allServersp == serverp )
+ cm_allServersp = serverp->allNextp;
+ else {
+ cm_server_t *tsp;
+
+ for(tsp = cm_allServersp; tsp->allNextp; tsp=tsp->allNextp) {
+ if ( tsp->allNextp == serverp ) {
+ tsp->allNextp = serverp->allNextp;
+ break;
+ }
+ }
+ }
- lock_FinalizeMutex(&server->mx);
- if ( cm_allServersp == server )
- cm_allServersp = server->allNextp;
- else {
- cm_server_t *tsp;
+ /* free the volid list */
+ for ( tsrvp = serverp->vols; tsrvp; tsrvp = nextp) {
+ nextp = tsrvp->nextp;
+ free(tsrvp);
+ }
- for(tsp = cm_allServersp; tsp->allNextp; tsp=tsp->allNextp) {
- if ( tsp->allNextp == server ) {
- tsp->allNextp = server->allNextp;
- break;
- }
+ free(serverp);
+ }
+ }
+}
+
+void cm_RemoveVolumeFromServer(cm_server_t * serverp, afs_uint32 volID)
+{
+ cm_server_vols_t * tsrvp;
+ int i;
+
+ if (volID == 0)
+ return;
+
+ for (tsrvp = serverp->vols; tsrvp; tsrvp = tsrvp->nextp) {
+ for (i=0; i<NUM_SERVER_VOLS; i++) {
+ if (tsrvp->ids[i] == volID) {
+ tsrvp->ids[i] = 0;;
+ break;
}
}
}
- }
+}
-void cm_FreeServerList(cm_serverRef_t** list)
+void cm_FreeServerList(cm_serverRef_t** list, afs_uint32 flags)
{
- cm_serverRef_t *current = *list;
- cm_serverRef_t *next = 0;
+ cm_serverRef_t **current = list;
+ cm_serverRef_t **nextp = 0;
+ cm_serverRef_t * next = 0;
lock_ObtainWrite(&cm_serverLock);
- while (current)
+ while (*current)
{
- next = current->next;
- cm_FreeServer(current->server);
- free(current);
- current = next;
+ nextp = &(*current)->next;
+ if (--((*current)->refCount) == 0) {
+ next = *nextp;
+
+ if ((*current)->volID)
+ cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
+ cm_FreeServer((*current)->server);
+ free(*current);
+ *current = next;
+ } else {
+ if (flags & CM_FREESERVERLIST_DELETE) {
+ (*current)->status = srv_deleted;
+ if ((*current)->volID)
+ cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
+ }
+ current = nextp;
+ }
}
lock_ReleaseWrite(&cm_serverLock);
}
+cm_server_t *
+cm_FindServerByIP(afs_uint32 ipaddr)
+{
+ cm_server_t *tsp;
+
+ lock_ObtainRead(&cm_serverLock);
+ for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
+ if (tsp->addr.sin_addr.S_un.S_addr == ipaddr)
+ break;
+ }
+ lock_ReleaseRead(&cm_serverLock);
+
+ return tsp;
+}
+
git://git.openafs.org / openafs.git / blobdiff