/*
* Copyright 2000, International Business Machines Corporation and others.
* All Rights Reserved.
- *
+ *
* This software has been released under the terms of the IBM Public
* License. For details, see the LICENSE file in the top-level source
* directory or online at http://www.openafs.org/dl/license10.html
#include <afsconfig.h>
#include <afs/param.h>
-RCSID("$Header$");
+#include <roken.h>
-#include <sys/types.h>
-#ifdef AFS_NT40_ENV
-#include <winsock2.h>
-#include <time.h>
+#include <afs/opr.h>
+
+#ifdef AFS_PTHREAD_ENV
+# include <opr/lock.h>
#else
-#include <sys/file.h>
-#include <netinet/in.h>
-#include <sys/time.h>
+# include <opr/lockstub.h>
#endif
-#include <assert.h>
-#include <lock.h>
-#include <rx/xdr.h>
+
#include <rx/rx.h>
-#include <errno.h>
+#include <afs/afsutil.h>
+#include <afs/cellconfig.h>
+
#define UBIK_INTERNALS
#include "ubik.h"
#include "ubik_int.h"
-/* This module is responsible for determining when the system has
+/*! \file
+ * This module is responsible for determining when the system has
* recovered to the point that it can handle new transactions. It
* replays logs, polls to determine the current dbase after a crash,
* and distributes the new database to the others.
- */
-
-/* The sync site associates a version number with each database. It
+ *
+ * The sync site associates a version number with each database. It
* broadcasts the version associated with its current dbase in every
* one of its beacon messages. When the sync site send a dbase to a
* server, it also sends the db's version. A non-sync site server can
* tell if it has the right dbase version by simply comparing the
- * version from the beacon message (uvote_dbVersion) with the version
- * associated with the database (ubik_dbase->version). The sync site
+ * version from the beacon message \p uvote_dbVersion with the version
+ * associated with the database \p ubik_dbase->version. The sync site
* itself simply has one counter to keep track of all of this (again
- * ubik_dbase->version).
- */
-
-/* sync site: routine called when the sync site loses its quorum; this
+ * \p ubik_dbase->version).
+ *
+ * sync site: routine called when the sync site loses its quorum; this
* procedure is called "up" from the beacon package. It resyncs the
* dbase and nudges the recovery daemon to try to propagate out the
* changes. It also resets the recovery daemon's state, since
* recovery must potentially find a new dbase to propagate out. This
* routine should not do anything with variables used by non-sync site
* servers.
- */
+ */
-/* if this flag is set, then ubik will use only the primary address
-** ( the address specified in the CellServDB) to contact other
-** ubik servers. Ubik recovery will not try opening connections
-** to the alternate interface addresses.
-*/
+/*!
+ * if this flag is set, then ubik will use only the primary address
+ * (the address specified in the CellServDB) to contact other
+ * ubik servers. Ubik recovery will not try opening connections
+ * to the alternate interface addresses.
+ */
int ubikPrimaryAddrOnly;
-urecovery_ResetState() {
+int
+urecovery_ResetState(void)
+{
urecovery_state = 0;
- LWP_NoYieldSignal(&urecovery_state);
return 0;
}
-/* sync site: routine called when a non-sync site server goes down; restarts recovery
- * process to send missing server the new db when it comes back up.
- * This routine should not do anything with variables used by non-sync site servers.
+/*!
+ * \brief sync site
+ *
+ * routine called when a non-sync site server goes down; restarts recovery
+ * process to send missing server the new db when it comes back up for
+ * non-sync site servers.
+ *
+ * \note This routine should not do anything with variables used by non-sync site servers.
*/
-urecovery_LostServer() {
- LWP_NoYieldSignal(&urecovery_state);
+int
+urecovery_LostServer(struct ubik_server *ts)
+{
+ ubeacon_ReinitServer(ts);
return 0;
}
-/* return true iff we have a current database (called by both sync
+/*!
+ * return true iff we have a current database (called by both sync
* sites and non-sync sites) How do we determine this? If we're the
* sync site, we wait until recovery has finished fetching and
* re-labelling its dbase (it may still be trying to propagate it out
* site, then we must have a dbase labelled with the right version,
* and we must have a currently-good sync site.
*/
-urecovery_AllBetter(adbase, areadAny)
- int areadAny;
- register struct ubik_dbase *adbase; {
- register afs_int32 rcode;
+int
+urecovery_AllBetter(struct ubik_dbase *adbase, int areadAny)
+{
+ afs_int32 rcode;
- ubik_dprint("allbetter checking\n");
+ ViceLog(25, ("allbetter checking\n"));
rcode = 0;
-
-
+
+
if (areadAny) {
- if (ubik_dbase->version.epoch > 1)
- rcode = 1; /* Happy with any good version of database */
+ if (ubik_dbase->version.epoch > 1)
+ rcode = 1; /* Happy with any good version of database */
}
/* Check if we're sync site and we've got the right data */
* that the sync site is still the sync site, 'cause it won't talk
* to us until a timeout period has gone by. When we recover, we
* leave this clear until we get a new dbase */
- else if ( (uvote_GetSyncSite() &&
- (vcmp(ubik_dbVersion, ubik_dbase->version) == 0)) ) { /* && order is important */
+ else if (uvote_HaveSyncAndVersion(ubik_dbase->version)) {
rcode = 1;
}
- ubik_dprint("allbetter: returning %d\n", rcode);
+ ViceLog(25, ("allbetter: returning %d\n", rcode));
return rcode;
}
-/* abort all transactions on this database */
-urecovery_AbortAll(adbase)
-struct ubik_dbase *adbase; {
- register struct ubik_trans *tt;
- for(tt = adbase->activeTrans; tt; tt=tt->next) {
+/*!
+ * \brief abort all transactions on this database
+ */
+int
+urecovery_AbortAll(struct ubik_dbase *adbase)
+{
+ struct ubik_trans *tt;
+ int reads = 0, writes = 0;
+
+ for (tt = adbase->activeTrans; tt; tt = tt->next) {
+ if (tt->type == UBIK_WRITETRANS)
+ writes++;
+ else
+ reads++;
udisk_abort(tt);
}
+ ViceLog(0, ("urecovery_AbortAll: just aborted %d read and %d write transactions\n",
+ reads, writes));
return 0;
}
-/* this routine aborts the current remote transaction, if any, if the tid is wrong */
-urecovery_CheckTid(atid)
- register struct ubik_tid *atid; {
+/*!
+ * \brief this routine aborts the current remote transaction, if any, if the tid is wrong
+ */
+int
+urecovery_CheckTid(struct ubik_tid *atid, int abortalways)
+{
if (ubik_currentTrans) {
/* there is remote write trans, see if we match, see if this
- * is a new transaction */
- if (atid->epoch != ubik_currentTrans->tid.epoch || atid->counter > ubik_currentTrans->tid.counter) {
+ * is a new transaction */
+ if (atid->epoch != ubik_currentTrans->tid.epoch
+ || atid->counter > ubik_currentTrans->tid.counter || abortalways) {
/* don't match, abort it */
+ int endit = 0;
/* If the thread is not waiting for lock - ok to end it */
if (ubik_currentTrans->locktype != LOCKWAIT) {
- udisk_end(ubik_currentTrans);
+ endit = 1;
}
- ubik_currentTrans = (struct ubik_trans *) 0;
+
+ ViceLog(0, ("urecovery_CheckTid: Aborting/ending bad remote "
+ "transaction. (tx %d.%d, atid %d.%d, abortalways %d, "
+ "endit %d)\n",
+ ubik_currentTrans->tid.epoch,
+ ubik_currentTrans->tid.counter,
+ atid->epoch, atid->counter,
+ abortalways, endit));
+ if (endit) {
+ udisk_end(ubik_currentTrans);
+ }
+ ubik_currentTrans = (struct ubik_trans *)0;
}
}
+ return 0;
}
-/* log format is defined here, and implicitly in disk.c
+/*!
+ * \brief replay logs
+ *
+ * log format is defined here, and implicitly in disk.c
*
* 4 byte opcode, followed by parameters, each 4 bytes long. All integers
* are in logged in network standard byte order, in case we want to move logs
* from machine-to-machine someday.
*
- * Begin transaction: opcode
- * Commit transaction: opcode, version (8 bytes)
- * Truncate file: opcode, file number, length
- * Abort transaction: opcode
- * Write data: opcode, file, position, length, <length> data bytes
+ * Begin transaction: opcode \n
+ * Commit transaction: opcode, version (8 bytes) \n
+ * Truncate file: opcode, file number, length \n
+ * Abort transaction: opcode \n
+ * Write data: opcode, file, position, length, <length> data bytes \n
*
* A very simple routine, it just replays the log. Note that this is a new-value only log, which
* implies that no uncommitted data is written to the dbase: one writes data to the log, including
* abort and the remaining dbase on the disk is exactly the right dbase, without having to read
* the log.
*/
-
-/* replay logs */
-static ReplayLog(adbase)
- register struct ubik_dbase *adbase; {
+static int
+ReplayLog(struct ubik_dbase *adbase)
+{
afs_int32 opcode;
- register afs_int32 code, tpos;
+ afs_int32 code, tpos;
int logIsGood;
afs_int32 len, thisSize, tfile, filePos;
afs_int32 buffer[4];
afs_int32 data[1024];
/* read the lock twice, once to see whether we have a transaction to deal
- with that committed, (theoretically, we should support more than one
- trans in the log at once, but not yet), and once replaying the
- transactions. */
+ * with that committed, (theoretically, we should support more than one
+ * trans in the log at once, but not yet), and once replaying the
+ * transactions. */
tpos = 0;
logIsGood = 0;
/* for now, assume that all ops in log pertain to one transaction; see if there's a commit */
while (1) {
- code = (*adbase->read)(adbase, LOGFILE, &opcode, tpos, sizeof(afs_int32));
- if (code != sizeof(afs_int32)) break;
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)&opcode, tpos,
+ sizeof(afs_int32));
+ if (code != sizeof(afs_int32))
+ break;
+ opcode = ntohl(opcode);
if (opcode == LOGNEW) {
/* handle begin trans */
tpos += sizeof(afs_int32);
- }
- else if (opcode == LOGABORT) break;
+ } else if (opcode == LOGABORT)
+ break;
else if (opcode == LOGEND) {
logIsGood = 1;
break;
- }
- else if (opcode == LOGTRUNCATE) {
+ } else if (opcode == LOGTRUNCATE) {
tpos += 4;
- code = (*adbase->read)(adbase, LOGFILE, buffer, tpos, 2*sizeof(afs_int32));
- if (code != 2*sizeof(afs_int32)) break; /* premature eof or io error */
- tpos += 2*sizeof(afs_int32);
- }
- else if (opcode == LOGDATA) {
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)buffer, tpos,
+ 2 * sizeof(afs_int32));
+ if (code != 2 * sizeof(afs_int32))
+ break; /* premature eof or io error */
+ tpos += 2 * sizeof(afs_int32);
+ } else if (opcode == LOGDATA) {
tpos += 4;
- code = (*adbase->read)(adbase, LOGFILE, buffer, tpos, 3*sizeof(afs_int32));
- if (code != 3*sizeof(afs_int32)) break;
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)buffer, tpos,
+ 3 * sizeof(afs_int32));
+ if (code != 3 * sizeof(afs_int32))
+ break;
/* otherwise, skip over the data bytes, too */
- tpos += buffer[2] + 3*sizeof(afs_int32);
- }
- else {
- ubik_dprint("corrupt log opcode (%d) at position %d\n", opcode, tpos);
- break; /* corrupt log! */
+ tpos += ntohl(buffer[2]) + 3 * sizeof(afs_int32);
+ } else {
+ ViceLog(0, ("corrupt log opcode (%d) at position %d\n", opcode,
+ tpos));
+ break; /* corrupt log! */
}
}
if (logIsGood) {
/* actually do the replay; log should go all the way through the commit record, since
- we just read it above. */
+ * we just read it above. */
tpos = 0;
logIsGood = 0;
syncFile = -1;
while (1) {
- code = (*adbase->read)(adbase, LOGFILE, &opcode, tpos, sizeof(afs_int32));
- if (code != sizeof(afs_int32)) break;
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)&opcode, tpos,
+ sizeof(afs_int32));
+ if (code != sizeof(afs_int32))
+ break;
+ opcode = ntohl(opcode);
if (opcode == LOGNEW) {
/* handle begin trans */
tpos += sizeof(afs_int32);
- }
- else if (opcode == LOGABORT) panic("log abort\n");
+ } else if (opcode == LOGABORT)
+ panic("log abort\n");
else if (opcode == LOGEND) {
+ struct ubik_version version;
tpos += 4;
- code = (*adbase->read) (adbase, LOGFILE, buffer, tpos, 2*sizeof(afs_int32));
- if (code != 2*sizeof(afs_int32)) return UBADLOG;
- code = (*adbase->setlabel) (adbase, 0, buffer);
- if (code) return code;
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)buffer, tpos,
+ 2 * sizeof(afs_int32));
+ if (code != 2 * sizeof(afs_int32))
+ return UBADLOG;
+ version.epoch = ntohl(buffer[0]);
+ version.counter = ntohl(buffer[1]);
+ code = (*adbase->setlabel) (adbase, 0, &version);
+ if (code)
+ return code;
+ ViceLog(0, ("Successfully replayed log for interrupted "
+ "transaction; db version is now %ld.%ld\n",
+ (long) version.epoch, (long) version.counter));
logIsGood = 1;
- break; /* all done now */
- }
- else if (opcode == LOGTRUNCATE) {
+ break; /* all done now */
+ } else if (opcode == LOGTRUNCATE) {
tpos += 4;
- code = (*adbase->read)(adbase, LOGFILE, buffer, tpos, 2*sizeof(afs_int32));
- if (code != 2*sizeof(afs_int32)) break; /* premature eof or io error */
- tpos += 2*sizeof(afs_int32);
- code = (*adbase->truncate) (adbase, ntohl(buffer[0]), ntohl(buffer[1]));
- if (code) return code;
- }
- else if (opcode == LOGDATA) {
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)buffer, tpos,
+ 2 * sizeof(afs_int32));
+ if (code != 2 * sizeof(afs_int32))
+ break; /* premature eof or io error */
+ tpos += 2 * sizeof(afs_int32);
+ code =
+ (*adbase->truncate) (adbase, ntohl(buffer[0]),
+ ntohl(buffer[1]));
+ if (code)
+ return code;
+ } else if (opcode == LOGDATA) {
tpos += 4;
- code = (*adbase->read)(adbase, LOGFILE, buffer, tpos, 3*sizeof(afs_int32));
- if (code != 3*sizeof(afs_int32)) break;
- tpos += 3*sizeof(afs_int32);
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)buffer, tpos,
+ 3 * sizeof(afs_int32));
+ if (code != 3 * sizeof(afs_int32))
+ break;
+ tpos += 3 * sizeof(afs_int32);
/* otherwise, skip over the data bytes, too */
- len = ntohl(buffer[2]); /* total number of bytes to copy */
+ len = ntohl(buffer[2]); /* total number of bytes to copy */
filePos = ntohl(buffer[1]);
tfile = ntohl(buffer[0]);
/* try to minimize file syncs */
if (syncFile != tfile) {
- if (syncFile >= 0) code = (*adbase->sync)(adbase, syncFile);
- else code = 0;
+ if (syncFile >= 0)
+ code = (*adbase->sync) (adbase, syncFile);
+ else
+ code = 0;
syncFile = tfile;
- if (code) return code;
+ if (code)
+ return code;
}
while (len > 0) {
- thisSize = (len > sizeof(data)? sizeof(data) : len);
+ thisSize = (len > sizeof(data) ? sizeof(data) : len);
/* copy sizeof(data) buffer bytes at a time */
- code = (*adbase->read)(adbase, LOGFILE, data, tpos, thisSize);
- if (code != thisSize) return UBADLOG;
- code = (*adbase->write)(adbase, tfile, data, filePos, thisSize);
- if (code != thisSize) return UBADLOG;
+ code =
+ (*adbase->read) (adbase, LOGFILE, (char *)data, tpos,
+ thisSize);
+ if (code != thisSize)
+ return UBADLOG;
+ code =
+ (*adbase->write) (adbase, tfile, (char *)data, filePos,
+ thisSize);
+ if (code != thisSize)
+ return UBADLOG;
filePos += thisSize;
tpos += thisSize;
len -= thisSize;
}
- }
- else {
- ubik_dprint("corrupt log opcode (%d) at position %d\n", opcode, tpos);
- break; /* corrupt log! */
+ } else {
+ ViceLog(0, ("corrupt log opcode (%d) at position %d\n",
+ opcode, tpos));
+ break; /* corrupt log! */
}
}
if (logIsGood) {
- if (syncFile >= 0) code = (*adbase->sync)(adbase, syncFile);
- if (code) return code;
- }
- else {
- ubik_dprint("Log read error on pass 2\n");
+ if (syncFile >= 0)
+ code = (*adbase->sync) (adbase, syncFile);
+ if (code)
+ return code;
+ } else {
+ ViceLog(0, ("Log read error on pass 2\n"));
return UBADLOG;
}
}
/* now truncate the log, we're done with it */
- code = (*adbase->truncate)(adbase, LOGFILE, 0);
+ code = (*adbase->truncate) (adbase, LOGFILE, 0);
return code;
}
-/* Called at initialization to figure out version of the dbase we really have.
+/*! \brief
+ * Called at initialization to figure out version of the dbase we really have.
+ *
* This routine is called after replaying the log; it reads the restored labels.
*/
-static InitializeDB(adbase)
- register struct ubik_dbase *adbase; {
- register afs_int32 code;
-
- code = (*adbase->getlabel)(adbase, 0, &adbase->version);
+static int
+InitializeDB(struct ubik_dbase *adbase)
+{
+ afs_int32 code;
+
+ code = (*adbase->getlabel) (adbase, 0, &adbase->version);
if (code) {
/* try setting the label to a new value */
- adbase->version.epoch = 1; /* value for newly-initialized db */
+ UBIK_VERSION_LOCK;
+ adbase->version.epoch = 1; /* value for newly-initialized db */
adbase->version.counter = 1;
code = (*adbase->setlabel) (adbase, 0, &adbase->version);
if (code) {
adbase->version.counter = 0;
(*adbase->setlabel) (adbase, 0, &adbase->version);
}
- LWP_NoYieldSignal(&adbase->version);
+ UBIK_VERSION_UNLOCK;
}
return 0;
}
-/* initialize the local dbase
+/*!
+ * \brief initialize the local ubik_dbase
+ *
* We replay the logs and then read the resulting file to figure out what version we've really got.
*/
-urecovery_Initialize(adbase)
- register struct ubik_dbase *adbase; {
- register afs_int32 code;
+int
+urecovery_Initialize(struct ubik_dbase *adbase)
+{
+ afs_int32 code;
+ DBHOLD(adbase);
code = ReplayLog(adbase);
- if (code) return code;
+ if (code)
+ goto done;
code = InitializeDB(adbase);
+done:
+ DBRELE(adbase);
return code;
}
-/* Main interaction loop for the recovery manager
+/*!
+ * \brief Main interaction loop for the recovery manager
+ *
* The recovery light-weight process only runs when you're the
* synchronization site. It performs the following tasks, if and only
* if the prerequisite tasks have been performed successfully (it
* keeps track of which ones have been performed in its bit map,
- * urecovery_state).
+ * \p urecovery_state).
*
* First, it is responsible for probing that all servers are up. This
* is the only operation that must be performed even if this is not
* requests. However, the recovery module still has one more task:
* propagating the dbase out to everyone who is up in the network.
*/
-urecovery_Interact() {
- afs_int32 code, tcode;
- struct ubik_server *bestServer;
+void *
+urecovery_Interact(void *dummy)
+{
+ afs_int32 code;
+ struct ubik_server *bestServer = NULL;
struct ubik_server *ts;
int dbok, doingRPC, now;
- afs_int32 lastProbeTime, lastDBVCheck;
+ afs_int32 lastProbeTime;
/* if we're the sync site, the best db version we've found yet */
static struct ubik_version bestDBVersion;
struct ubik_version tversion;
struct timeval tv;
int length, tlen, offset, file, nbytes;
struct rx_call *rxcall;
- char tbuffer[256];
+ char tbuffer[1024];
struct ubik_stat ubikstat;
struct in_addr inAddr;
+ char hoststr[16];
+ char pbuffer[1028];
+ int fd = -1;
+ afs_int32 pass;
+
+ opr_threadname_set("recovery");
/* otherwise, begin interaction */
urecovery_state = 0;
lastProbeTime = 0;
- lastDBVCheck = 0;
while (1) {
/* Run through this loop every 4 seconds */
tv.tv_sec = 4;
tv.tv_usec = 0;
+#ifdef AFS_PTHREAD_ENV
+ select(0, 0, 0, 0, &tv);
+#else
IOMGR_Select(0, 0, 0, 0, &tv);
+#endif
- ubik_dprint("recovery running in state %x\n", urecovery_state);
+ ViceLog(5, ("recovery running in state %x\n", urecovery_state));
/* Every 30 seconds, check all the down servers and mark them
* as up if they respond. When a server comes up or found to
- * not be current, then re-find the the best database and
+ * not be current, then re-find the the best database and
* propogate it.
*/
- if ( (now = FT_ApproxTime()) > 30 + lastProbeTime) {
- for (ts=ubik_servers,doingRPC=0; ts; ts=ts->next) {
+ if ((now = FT_ApproxTime()) > 30 + lastProbeTime) {
+
+ for (ts = ubik_servers, doingRPC = 0; ts; ts = ts->next) {
+ UBIK_BEACON_LOCK;
if (!ts->up) {
+ UBIK_BEACON_UNLOCK;
doingRPC = 1;
- code = DoProbe(ts);
+ code = DoProbe(ts);
if (code == 0) {
- ts->up = 1;
- urecovery_state &= ~UBIK_RECFOUNDDB;
+ UBIK_BEACON_LOCK;
+ ts->up = 1;
+ UBIK_BEACON_UNLOCK;
+ DBHOLD(ubik_dbase);
+ urecovery_state &= ~UBIK_RECFOUNDDB;
+ DBRELE(ubik_dbase);
}
- } else if (!ts->currentDB) {
- urecovery_state &= ~UBIK_RECFOUNDDB;
+ } else {
+ UBIK_BEACON_UNLOCK;
+ DBHOLD(ubik_dbase);
+ if (!ts->currentDB)
+ urecovery_state &= ~UBIK_RECFOUNDDB;
+ DBRELE(ubik_dbase);
}
}
- if (doingRPC)
+
+ if (doingRPC)
now = FT_ApproxTime();
lastProbeTime = now;
}
/* Mark whether we are the sync site */
+ DBHOLD(ubik_dbase);
if (!ubeacon_AmSyncSite()) {
urecovery_state &= ~UBIK_RECSYNCSITE;
+ DBRELE(ubik_dbase);
continue; /* nothing to do */
}
urecovery_state |= UBIK_RECSYNCSITE;
-
- /* If a server has just come up or if we have not found the
+
+ /* If a server has just come up or if we have not found the
* most current database, then go find the most current db.
*/
if (!(urecovery_state & UBIK_RECFOUNDDB)) {
- bestServer = (struct ubik_server *) 0;
+ int okcalls = 0;
+ DBRELE(ubik_dbase);
+ bestServer = (struct ubik_server *)0;
bestDBVersion.epoch = 0;
bestDBVersion.counter = 0;
- for(ts=ubik_servers; ts; ts=ts->next) {
- if (!ts->up) continue; /* don't bother with these guys */
- if (ts->isClone) continue;
+ for (ts = ubik_servers; ts; ts = ts->next) {
+ UBIK_BEACON_LOCK;
+ if (!ts->up) {
+ UBIK_BEACON_UNLOCK;
+ continue; /* don't bother with these guys */
+ }
+ UBIK_BEACON_UNLOCK;
+ if (ts->isClone)
+ continue;
+ UBIK_ADDR_LOCK;
code = DISK_GetVersion(ts->disk_rxcid, &ts->version);
+ UBIK_ADDR_UNLOCK;
if (code == 0) {
+ okcalls++;
/* perhaps this is the best version */
if (vcmp(ts->version, bestDBVersion) > 0) {
/* new best version */
}
}
}
- /* take into consideration our version. Remember if we,
- * the sync site, have the best version. Also note that
- * we may need to send the best version out.
- */
- if (vcmp(ubik_dbase->version, bestDBVersion) >= 0) {
- bestDBVersion = ubik_dbase->version;
- bestServer = (struct ubik_server *) 0;
- urecovery_state |= UBIK_RECHAVEDB;
- } else {
- /* Clear the flag only when we know we have to retrieve
- * the db. Because urecovery_AllBetter() looks at it.
- */
- urecovery_state &= ~UBIK_RECHAVEDB;
- }
- lastDBVCheck = FT_ApproxTime();
- urecovery_state |= UBIK_RECFOUNDDB;
- urecovery_state &= ~UBIK_RECSENTDB;
+
+ DBHOLD(ubik_dbase);
+
+ if (okcalls + 1 >= ubik_quorum) {
+ /* If we've asked a majority of sites about their db version,
+ * then we can say with confidence that we've found the best db
+ * version. If we haven't contacted most sites (because
+ * GetVersion failed or because we already know the server is
+ * down), then we don't really know if we know about the best
+ * db version. So we can only proceed in here if 'okcalls'
+ * indicates we managed to contact a majority of sites. */
+
+ /* take into consideration our version. Remember if we,
+ * the sync site, have the best version. Also note that
+ * we may need to send the best version out.
+ */
+ if (vcmp(ubik_dbase->version, bestDBVersion) >= 0) {
+ bestDBVersion = ubik_dbase->version;
+ bestServer = (struct ubik_server *)0;
+ urecovery_state |= UBIK_RECHAVEDB;
+ } else {
+ /* Clear the flag only when we know we have to retrieve
+ * the db. Because urecovery_AllBetter() looks at it.
+ */
+ urecovery_state &= ~UBIK_RECHAVEDB;
+ }
+ urecovery_state |= UBIK_RECFOUNDDB;
+ urecovery_state &= ~UBIK_RECSENTDB;
+ }
+ }
+ if (!(urecovery_state & UBIK_RECFOUNDDB)) {
+ DBRELE(ubik_dbase);
+ continue; /* not ready */
}
- if (!(urecovery_state & UBIK_RECFOUNDDB)) continue; /* not ready */
/* If we, the sync site, do not have the best db version, then
* go and get it from the server that does.
*/
if ((urecovery_state & UBIK_RECHAVEDB) || !bestServer) {
- urecovery_state |= UBIK_RECHAVEDB;
+ urecovery_state |= UBIK_RECHAVEDB;
} else {
- /* we don't have the best version; we should fetch it. */
- ObtainWriteLock(&ubik_dbase->versionLock);
- urecovery_AbortAll(ubik_dbase);
-
- /* Rx code to do the Bulk fetch */
- file = 0;
- offset = 0;
- rxcall = rx_NewCall(bestServer->disk_rxcid);
-
- ubik_print("Ubik: Synchronize database with server %s\n", afs_inet_ntoa(bestServer->addr[0]));
-
- code = StartDISK_GetFile(rxcall, file);
- if (code) {
- ubik_dprint("StartDiskGetFile failed=%d\n", code);
- goto FetchEndCall;
- }
- nbytes = rx_Read(rxcall, &length, sizeof(afs_int32));
- length = ntohl(length);
- if (nbytes != sizeof(afs_int32)) {
- ubik_dprint("Rx-read length error=%d\n", code=BULK_ERROR);
- code = EIO;
- goto FetchEndCall;
- }
-
- /* Truncate the file firest */
- code = (*ubik_dbase->truncate)(ubik_dbase, file, 0);
- if (code) {
- ubik_dprint("truncate io error=%d\n", code);
- goto FetchEndCall;
- }
-
- /* give invalid label during file transit */
- tversion.epoch = 0;
- tversion.counter = 0;
- code = (*ubik_dbase->setlabel)(ubik_dbase, file, &tversion);
- if (code) {
- ubik_dprint("setlabel io error=%d\n", code);
- goto FetchEndCall;
- }
-
- while (length > 0) {
- tlen = (length > sizeof(tbuffer) ? sizeof(tbuffer) : length);
- nbytes = rx_Read(rxcall, tbuffer, tlen);
- if (nbytes != tlen) {
- ubik_dprint("Rx-read bulk error=%d\n", code=BULK_ERROR);
- code = EIO;
- goto FetchEndCall;
- }
- nbytes = (*ubik_dbase->write)(ubik_dbase, file, tbuffer, offset, tlen);
- if (nbytes != tlen) {
- code = UIOERROR;
- goto FetchEndCall;
- }
- offset += tlen;
- length -= tlen;
- }
- code = EndDISK_GetFile(rxcall, &tversion);
-FetchEndCall:
- tcode = rx_EndCall(rxcall, code);
- if (!code) code = tcode;
- if (!code) {
- /* we got a new file, set up its header */
- urecovery_state |= UBIK_RECHAVEDB;
- bcopy(&tversion, &ubik_dbase->version, sizeof(struct ubik_version));
- (*ubik_dbase->sync)(ubik_dbase, 0); /* get data out first */
- /* after data is good, sync disk with correct label */
- code = (*ubik_dbase->setlabel)(ubik_dbase, 0, &ubik_dbase->version);
- }
- if (code) {
- ubik_dbase->version.epoch = 0;
- ubik_dbase->version.counter = 0;
- ubik_print("Ubik: Synchronize database failed (error = %d)\n", code);
- } else {
- ubik_print("Ubik: Synchronize database completed\n");
- }
- udisk_Invalidate(ubik_dbase, 0); /* data has changed */
- LWP_NoYieldSignal(&ubik_dbase->version);
- ReleaseWriteLock(&ubik_dbase->versionLock);
+ /* we don't have the best version; we should fetch it. */
+ urecovery_AbortAll(ubik_dbase);
+
+ /* Rx code to do the Bulk fetch */
+ file = 0;
+ offset = 0;
+ UBIK_ADDR_LOCK;
+ rxcall = rx_NewCall(bestServer->disk_rxcid);
+
+ ViceLog(0, ("Ubik: Synchronize database: receive (via GetFile) "
+ "from server %s begin\n",
+ afs_inet_ntoa_r(bestServer->addr[0], hoststr)));
+ UBIK_ADDR_UNLOCK;
+
+ code = StartDISK_GetFile(rxcall, file);
+ if (code) {
+ ViceLog(0, ("StartDiskGetFile failed=%d\n", code));
+ goto FetchEndCall;
+ }
+ nbytes = rx_Read(rxcall, (char *)&length, sizeof(afs_int32));
+ length = ntohl(length);
+ if (nbytes != sizeof(afs_int32)) {
+ ViceLog(0, ("Rx-read length error=%d\n", BULK_ERROR));
+ code = EIO;
+ goto FetchEndCall;
+ }
+
+ /* give invalid label during file transit */
+ UBIK_VERSION_LOCK;
+ tversion.epoch = 0;
+ code = (*ubik_dbase->setlabel) (ubik_dbase, file, &tversion);
+ UBIK_VERSION_UNLOCK;
+ if (code) {
+ ViceLog(0, ("setlabel io error=%d\n", code));
+ goto FetchEndCall;
+ }
+ snprintf(pbuffer, sizeof(pbuffer), "%s.DB%s%d.TMP",
+ ubik_dbase->pathName, (file<0)?"SYS":"",
+ (file<0)?-file:file);
+ fd = open(pbuffer, O_CREAT | O_RDWR | O_TRUNC, 0600);
+ if (fd < 0) {
+ code = errno;
+ goto FetchEndCall;
+ }
+ code = lseek(fd, HDRSIZE, 0);
+ if (code != HDRSIZE) {
+ close(fd);
+ goto FetchEndCall;
+ }
+
+ pass = 0;
+ while (length > 0) {
+ tlen = (length > sizeof(tbuffer) ? sizeof(tbuffer) : length);
+#ifndef AFS_PTHREAD_ENV
+ if (pass % 4 == 0)
+ IOMGR_Poll();
+#endif
+ nbytes = rx_Read(rxcall, tbuffer, tlen);
+ if (nbytes != tlen) {
+ ViceLog(0, ("Rx-read bulk error=%d\n", BULK_ERROR));
+ code = EIO;
+ close(fd);
+ goto FetchEndCall;
+ }
+ nbytes = write(fd, tbuffer, tlen);
+ pass++;
+ if (nbytes != tlen) {
+ code = UIOERROR;
+ close(fd);
+ goto FetchEndCall;
+ }
+ offset += tlen;
+ length -= tlen;
+ }
+ code = close(fd);
+ if (code)
+ goto FetchEndCall;
+ code = EndDISK_GetFile(rxcall, &tversion);
+ FetchEndCall:
+ code = rx_EndCall(rxcall, code);
+ if (!code) {
+ /* we got a new file, set up its header */
+ urecovery_state |= UBIK_RECHAVEDB;
+ UBIK_VERSION_LOCK;
+ memcpy(&ubik_dbase->version, &tversion,
+ sizeof(struct ubik_version));
+ snprintf(tbuffer, sizeof(tbuffer), "%s.DB%s%d",
+ ubik_dbase->pathName, (file<0)?"SYS":"",
+ (file<0)?-file:file);
+#ifdef AFS_NT40_ENV
+ snprintf(pbuffer, sizeof(pbuffer), "%s.DB%s%d.OLD",
+ ubik_dbase->pathName, (file<0)?"SYS":"",
+ (file<0)?-file:file);
+ code = unlink(pbuffer);
+ if (!code)
+ code = rename(tbuffer, pbuffer);
+ snprintf(pbuffer, sizeof(pbuffer), "%s.DB%s%d.TMP",
+ ubik_dbase->pathName, (file<0)?"SYS":"",
+ (file<0)?-file:file);
+#endif
+ if (!code)
+ code = rename(pbuffer, tbuffer);
+ if (!code) {
+ (*ubik_dbase->open) (ubik_dbase, file);
+ /* after data is good, sync disk with correct label */
+ code =
+ (*ubik_dbase->setlabel) (ubik_dbase, 0,
+ &ubik_dbase->version);
+ }
+ UBIK_VERSION_UNLOCK;
+#ifdef AFS_NT40_ENV
+ snprintf(pbuffer, sizeof(pbuffer), "%s.DB%s%d.OLD",
+ ubik_dbase->pathName, (file<0)?"SYS":"",
+ (file<0)?-file:file);
+ unlink(pbuffer);
+#endif
+ }
+ if (code) {
+ unlink(pbuffer);
+ /*
+ * We will effectively invalidate the old data forever now.
+ * Unclear if we *should* but we do.
+ */
+ UBIK_VERSION_LOCK;
+ ubik_dbase->version.epoch = 0;
+ ubik_dbase->version.counter = 0;
+ UBIK_VERSION_UNLOCK;
+ ViceLog(0,
+ ("Ubik: Synchronize database: receive (via GetFile) "
+ "from server %s failed (error = %d)\n",
+ afs_inet_ntoa_r(bestServer->addr[0], hoststr), code));
+ } else {
+ ViceLog(0,
+ ("Ubik: Synchronize database: receive (via GetFile) "
+ "from server %s complete, version: %d.%d\n",
+ afs_inet_ntoa_r(bestServer->addr[0], hoststr),
+ ubik_dbase->version.epoch, ubik_dbase->version.counter));
+
+ urecovery_state |= UBIK_RECHAVEDB;
+ }
+ udisk_Invalidate(ubik_dbase, 0); /* data has changed */
}
- if (!(urecovery_state & UBIK_RECHAVEDB)) continue; /* not ready */
-
+ if (!(urecovery_state & UBIK_RECHAVEDB)) {
+ DBRELE(ubik_dbase);
+ continue; /* not ready */
+ }
+
/* If the database was newly initialized, then when we establish quorum, write
* a new label. This allows urecovery_AllBetter() to allow access for reads.
* Setting it to 2 also allows another site to come along with a newer
* database and overwrite this one.
*/
if (ubik_dbase->version.epoch == 1) {
- ObtainWriteLock(&ubik_dbase->versionLock);
- urecovery_AbortAll(ubik_dbase);
- ubik_epochTime = 2;
- ubik_dbase->version.epoch = ubik_epochTime;
- ubik_dbase->version.counter = 1;
- code = (*ubik_dbase->setlabel) (ubik_dbase, 0, &ubik_dbase->version);
- udisk_Invalidate(ubik_dbase, 0); /* data may have changed */
- LWP_NoYieldSignal(&ubik_dbase->version);
- ReleaseWriteLock(&ubik_dbase->versionLock);
+ urecovery_AbortAll(ubik_dbase);
+ UBIK_VERSION_LOCK;
+ ubik_dbase->version.epoch = 2;
+ ubik_dbase->version.counter = 1;
+ code =
+ (*ubik_dbase->setlabel) (ubik_dbase, 0, &ubik_dbase->version);
+ UBIK_VERSION_UNLOCK;
+ udisk_Invalidate(ubik_dbase, 0); /* data may have changed */
}
/* Check the other sites and send the database to them if they
*/
if (!(urecovery_state & UBIK_RECSENTDB)) {
/* now propagate out new version to everyone else */
- dbok = 1; /* start off assuming they all worked */
+ dbok = 1; /* start off assuming they all worked */
- ObtainWriteLock(&ubik_dbase->versionLock);
/*
* Check if a write transaction is in progress. We can't send the
* db when a write is in progress here because the db would be
* the write-lock above if there is a write transaction in progress,
* but then, it won't hurt to check, will it?
*/
- if (ubik_dbase->flags & DBWRITING) {
- struct timeval tv;
- int safety = 0;
- tv.tv_sec = 0;
- tv.tv_usec = 50000;
- while ((ubik_dbase->flags & DBWRITING) && (safety < 500)) {
- ReleaseWriteLock(&ubik_dbase->versionLock);
- /* sleep for a little while */
- IOMGR_Select(0, 0, 0, 0, &tv);
- tv.tv_usec += 10000; safety++;
- ObtainWriteLock(&ubik_dbase->versionLock);
- }
+ if (ubik_dbase->dbFlags & DBWRITING) {
+ struct timeval tv;
+ int safety = 0;
+ long cur_usec = 50000;
+ while ((ubik_dbase->dbFlags & DBWRITING) && (safety < 500)) {
+ DBRELE(ubik_dbase);
+ /* sleep for a little while */
+ tv.tv_sec = 0;
+ tv.tv_usec = cur_usec;
+#ifdef AFS_PTHREAD_ENV
+ select(0, 0, 0, 0, &tv);
+#else
+ IOMGR_Select(0, 0, 0, 0, &tv);
+#endif
+ cur_usec += 10000;
+ safety++;
+ DBHOLD(ubik_dbase);
+ }
}
- for(ts=ubik_servers; ts; ts=ts->next) {
- inAddr.s_addr = ts->addr[0];
+ for (ts = ubik_servers; ts; ts = ts->next) {
+ UBIK_ADDR_LOCK;
+ inAddr.s_addr = ts->addr[0];
+ UBIK_ADDR_UNLOCK;
+ UBIK_BEACON_LOCK;
if (!ts->up) {
- ubik_dprint("recovery cannot send version to %s\n",
- afs_inet_ntoa(inAddr.s_addr));
+ UBIK_BEACON_UNLOCK;
+ /* It would be nice to have this message at loglevel
+ * 0 as well, but it will log once every 4s for each
+ * down server while in this recovery state. This
+ * should only be changed to loglevel 0 if it is
+ * also rate-limited.
+ */
+ ViceLog(5, ("recovery cannot send version to %s\n",
+ afs_inet_ntoa_r(inAddr.s_addr, hoststr)));
dbok = 0;
continue;
}
- ubik_dprint("recovery sending version to %s\n",
- afs_inet_ntoa(inAddr.s_addr));
+ UBIK_BEACON_UNLOCK;
+
if (vcmp(ts->version, ubik_dbase->version) != 0) {
- ubik_dprint("recovery stating local database\n");
+ ViceLog(0, ("Synchronize database: send (via SendFile) "
+ "to server %s begin\n",
+ afs_inet_ntoa_r(inAddr.s_addr, hoststr)));
/* Rx code to do the Bulk Store */
- code = (*ubik_dbase->stat)(ubik_dbase, 0, &ubikstat);
+ code = (*ubik_dbase->stat) (ubik_dbase, 0, &ubikstat);
if (!code) {
length = ubikstat.size;
file = offset = 0;
+ UBIK_ADDR_LOCK;
rxcall = rx_NewCall(ts->disk_rxcid);
- code = StartDISK_SendFile(rxcall, file, length, &ubik_dbase->version);
- if (code) {
- ubik_dprint("StartDiskSendFile failed=%d\n", code);
+ UBIK_ADDR_UNLOCK;
+ code =
+ StartDISK_SendFile(rxcall, file, length,
+ &ubik_dbase->version);
+ if (code) {
+ ViceLog(0, ("StartDiskSendFile failed=%d\n",
+ code));
goto StoreEndCall;
}
- while (length > 0) {
- tlen = (length > sizeof(tbuffer) ? sizeof(tbuffer) : length);
- nbytes = (*ubik_dbase->read)(ubik_dbase, file, tbuffer, offset, tlen);
+ while (length > 0) {
+ tlen =
+ (length >
+ sizeof(tbuffer) ? sizeof(tbuffer) : length);
+ nbytes =
+ (*ubik_dbase->read) (ubik_dbase, file,
+ tbuffer, offset, tlen);
if (nbytes != tlen) {
- ubik_dprint("Local disk read error=%d\n", code=UIOERROR);
+ code = UIOERROR;
+ ViceLog(0, ("Local disk read error=%d\n", code));
goto StoreEndCall;
}
nbytes = rx_Write(rxcall, tbuffer, tlen);
- if (nbytes != tlen) {
- ubik_dprint("Rx-write bulk error=%d\n", code=BULK_ERROR);
+ if (nbytes != tlen) {
+ code = BULK_ERROR;
+ ViceLog(0, ("Rx-write bulk error=%d\n", code));
goto StoreEndCall;
}
offset += tlen;
length -= tlen;
}
code = EndDISK_SendFile(rxcall);
-StoreEndCall:
+ StoreEndCall:
code = rx_EndCall(rxcall, code);
}
+
if (code == 0) {
/* we set a new file, process its header */
ts->version = ubik_dbase->version;
ts->currentDB = 1;
+ ViceLog(0,
+ ("Ubik: Synchronize database: send (via SendFile) "
+ "to server %s complete, version: %d.%d\n",
+ afs_inet_ntoa_r(inAddr.s_addr, hoststr),
+ ts->version.epoch, ts->version.counter));
+
+ } else {
+ dbok = 0;
+ ViceLog(0,
+ ("Ubik: Synchronize database: send (via SendFile) "
+ "to server %s failed (error = %d)\n",
+ afs_inet_ntoa_r(inAddr.s_addr, hoststr), code));
}
- else dbok = 0;
- }
- else {
+ } else {
/* mark file up to date */
ts->currentDB = 1;
}
}
- ReleaseWriteLock(&ubik_dbase->versionLock);
- if (dbok) urecovery_state |= UBIK_RECSENTDB;
+ if (dbok)
+ urecovery_state |= UBIK_RECSENTDB;
}
+ DBRELE(ubik_dbase);
}
+ AFS_UNREACHED(return(NULL));
}
-/*
-** send a Probe to all the network address of this server
-** Return 0 if success, else return 1
-*/
-DoProbe(server)
-struct ubik_server *server;
+/*!
+ * \brief send a Probe to all the network address of this server
+ *
+ * \return 0 if success, else return 1
+ */
+int
+DoProbe(struct ubik_server *server)
{
struct rx_connection *conns[UBIK_MAX_INTERFACE_ADDR];
struct rx_connection *connSuccess = 0;
- int i, j;
- afs_uint32 addr;
- char buffer[32];
- extern afs_int32 ubikSecIndex;
- extern struct rx_securityClass *ubikSecClass;
-
- for (i=0; (addr=server->addr[i]) && (i<UBIK_MAX_INTERFACE_ADDR);i++)
- {
- conns[i] = rx_NewConnection(addr, ubik_callPortal, DISK_SERVICE_ID,
- ubikSecClass, ubikSecIndex);
-
- /* user requirement to use only the primary interface */
- if ( ubikPrimaryAddrOnly )
- {
+ int i, nconns, success_i = -1;
+ afs_uint32 addr;
+ char buffer[32];
+ char hoststr[16];
+
+ UBIK_ADDR_LOCK;
+ for (i = 0; (i < UBIK_MAX_INTERFACE_ADDR) && (addr = server->addr[i]);
+ i++) {
+ conns[i] =
+ rx_NewConnection(addr, ubik_callPortal, DISK_SERVICE_ID,
+ addr_globals.ubikSecClass, addr_globals.ubikSecIndex);
+
+ /* user requirement to use only the primary interface */
+ if (ubikPrimaryAddrOnly) {
i = 1;
break;
}
}
- assert(i); /* at least one interface address for this server */
+ UBIK_ADDR_UNLOCK;
+ nconns = i;
+ opr_Assert(nconns); /* at least one interface address for this server */
- multi_Rx(conns,i)
- {
+ multi_Rx(conns, nconns) {
multi_DISK_Probe();
- if ( !multi_error ) /* first success */
- {
- addr = server->addr[multi_i]; /* successful interface addr */
+ if (!multi_error) { /* first success */
+ success_i = multi_i;
- if ( server->disk_rxcid) /* destroy existing conn */
- rx_DestroyConnection(server->disk_rxcid);
- if ( server->vote_rxcid)
- rx_DestroyConnection(server->vote_rxcid);
+ multi_Abort;
+ }
+ } multi_End_Ignore;
- /* make new connections */
- server->disk_rxcid = conns[multi_i];
- server->vote_rxcid = rx_NewConnection(addr, ubik_callPortal,
- VOTE_SERVICE_ID, ubikSecClass, ubikSecIndex);/* for vote reqs*/
+ if (success_i >= 0) {
+ UBIK_ADDR_LOCK;
+ addr = server->addr[success_i]; /* successful interface addr */
- connSuccess = conns[multi_i];
- strcpy(buffer, (char*)afs_inet_ntoa(server->addr[0]));
- ubik_print("ubik:server %s is back up: will be contacted through %s\n",
- buffer, afs_inet_ntoa(addr));
+ if (server->disk_rxcid) /* destroy existing conn */
+ rx_DestroyConnection(server->disk_rxcid);
+ if (server->vote_rxcid)
+ rx_DestroyConnection(server->vote_rxcid);
- multi_Abort;
- }
- } multi_End_Ignore;
+ /* make new connections */
+ server->disk_rxcid = conns[success_i];
+ server->vote_rxcid = rx_NewConnection(addr, ubik_callPortal,
+ VOTE_SERVICE_ID, addr_globals.ubikSecClass,
+ addr_globals.ubikSecIndex);
+
+ connSuccess = conns[success_i];
+ strcpy(buffer, afs_inet_ntoa_r(server->addr[0], hoststr));
+
+ ViceLog(0, ("ubik:server %s is back up: will be contacted through %s\n",
+ buffer, afs_inet_ntoa_r(addr, hoststr)));
+ UBIK_ADDR_UNLOCK;
+ }
/* Destroy all connections except the one on which we succeeded */
- for ( j=0; j < i; j++)
- if ( conns[j] != connSuccess )
- rx_DestroyConnection(conns[j] );
+ for (i = 0; i < nconns; i++)
+ if (conns[i] != connSuccess)
+ rx_DestroyConnection(conns[i]);
if (!connSuccess)
- ubik_dprint("ubik:server %s still down\n",afs_inet_ntoa(server->addr[0]));
+ ViceLog(5, ("ubik:server %s still down\n",
+ afs_inet_ntoa_r(server->addr[0], hoststr)));
- if ( connSuccess ) return 0; /* success */
- else return 1; /* failure */
+ if (connSuccess)
+ return 0; /* success */
+ else
+ return 1; /* failure */
}
git://git.openafs.org / openafs.git / blobdiff