'MwSql' => __DIR__ . '/maintenance/sql.php',
'MySQLField' => __DIR__ . '/includes/db/DatabaseMysqlBase.php',
'MySQLMasterPos' => __DIR__ . '/includes/db/DatabaseMysqlBase.php',
- 'MySqlLockManager' => __DIR__ . '/includes/filebackend/lockmanager/DBLockManager.php',
+ 'MySqlLockManager' => __DIR__ . '/includes/filebackend/lockmanager/MySqlLockManager.php',
'MysqlInstaller' => __DIR__ . '/includes/installer/MysqlInstaller.php',
'MysqlUpdater' => __DIR__ . '/includes/installer/MysqlUpdater.php',
'NaiveForeignTitleFactory' => __DIR__ . '/includes/title/NaiveForeignTitleFactory.php',
'PopulateRecentChangesSource' => __DIR__ . '/maintenance/populateRecentChangesSource.php',
'PopulateRevisionLength' => __DIR__ . '/maintenance/populateRevisionLength.php',
'PopulateRevisionSha1' => __DIR__ . '/maintenance/populateRevisionSha1.php',
- 'PostgreSqlLockManager' => __DIR__ . '/includes/filebackend/lockmanager/DBLockManager.php',
+ 'PostgreSqlLockManager' => __DIR__ . '/includes/filebackend/lockmanager/PostgreSqlLockManager.php',
'PostgresBlob' => __DIR__ . '/includes/db/DatabasePostgres.php',
'PostgresField' => __DIR__ . '/includes/db/DatabasePostgres.php',
'PostgresInstaller' => __DIR__ . '/includes/installer/PostgresInstaller.php',
}
}
}
-
-/**
- * MySQL version of DBLockManager that supports shared locks.
- *
- * All lock servers must have the innodb table defined in locking/filelocks.sql.
- * All locks are non-blocking, which avoids deadlocks.
- *
- * @ingroup LockManager
- */
-class MySqlLockManager extends DBLockManager {
- /** @var array Mapping of lock types to the type actually used */
- protected $lockTypeMap = [
- self::LOCK_SH => self::LOCK_SH,
- self::LOCK_UW => self::LOCK_SH,
- self::LOCK_EX => self::LOCK_EX
- ];
-
- protected function getLocalLB() {
- // Use a separate connection so releaseAllLocks() doesn't rollback the main trx
- return wfGetLBFactory()->newMainLB( $this->domain );
- }
-
- protected function initConnection( $lockDb, IDatabase $db ) {
- # Let this transaction see lock rows from other transactions
- $db->query( "SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;" );
- }
-
- /**
- * Get a connection to a lock DB and acquire locks on $paths.
- * This does not use GET_LOCK() per http://bugs.mysql.com/bug.php?id=1118.
- *
- * @see DBLockManager::getLocksOnServer()
- * @param string $lockSrv
- * @param array $paths
- * @param string $type
- * @return Status
- */
- protected function doGetLocksOnServer( $lockSrv, array $paths, $type ) {
- $status = Status::newGood();
-
- $db = $this->getConnection( $lockSrv ); // checked in isServerUp()
-
- $keys = []; // list of hash keys for the paths
- $data = []; // list of rows to insert
- $checkEXKeys = []; // list of hash keys that this has no EX lock on
- # Build up values for INSERT clause
- foreach ( $paths as $path ) {
- $key = $this->sha1Base36Absolute( $path );
- $keys[] = $key;
- $data[] = [ 'fls_key' => $key, 'fls_session' => $this->session ];
- if ( !isset( $this->locksHeld[$path][self::LOCK_EX] ) ) {
- $checkEXKeys[] = $key;
- }
- }
-
- # Block new writers (both EX and SH locks leave entries here)...
- $db->insert( 'filelocks_shared', $data, __METHOD__, [ 'IGNORE' ] );
- # Actually do the locking queries...
- if ( $type == self::LOCK_SH ) { // reader locks
- $blocked = false;
- # Bail if there are any existing writers...
- if ( count( $checkEXKeys ) ) {
- $blocked = $db->selectField( 'filelocks_exclusive', '1',
- [ 'fle_key' => $checkEXKeys ],
- __METHOD__
- );
- }
- # Other prospective writers that haven't yet updated filelocks_exclusive
- # will recheck filelocks_shared after doing so and bail due to this entry.
- } else { // writer locks
- $encSession = $db->addQuotes( $this->session );
- # Bail if there are any existing writers...
- # This may detect readers, but the safe check for them is below.
- # Note: if two writers come at the same time, both bail :)
- $blocked = $db->selectField( 'filelocks_shared', '1',
- [ 'fls_key' => $keys, "fls_session != $encSession" ],
- __METHOD__
- );
- if ( !$blocked ) {
- # Build up values for INSERT clause
- $data = [];
- foreach ( $keys as $key ) {
- $data[] = [ 'fle_key' => $key ];
- }
- # Block new readers/writers...
- $db->insert( 'filelocks_exclusive', $data, __METHOD__ );
- # Bail if there are any existing readers...
- $blocked = $db->selectField( 'filelocks_shared', '1',
- [ 'fls_key' => $keys, "fls_session != $encSession" ],
- __METHOD__
- );
- }
- }
-
- if ( $blocked ) {
- foreach ( $paths as $path ) {
- $status->fatal( 'lockmanager-fail-acquirelock', $path );
- }
- }
-
- return $status;
- }
-
- /**
- * @see QuorumLockManager::releaseAllLocks()
- * @return Status
- */
- protected function releaseAllLocks() {
- $status = Status::newGood();
-
- foreach ( $this->conns as $lockDb => $db ) {
- if ( $db->trxLevel() ) { // in transaction
- try {
- $db->rollback( __METHOD__ ); // finish transaction and kill any rows
- } catch ( DBError $e ) {
- $status->fatal( 'lockmanager-fail-db-release', $lockDb );
- }
- }
- }
-
- return $status;
- }
-}
-
-/**
- * PostgreSQL version of DBLockManager that supports shared locks.
- * All locks are non-blocking, which avoids deadlocks.
- *
- * @ingroup LockManager
- */
-class PostgreSqlLockManager extends DBLockManager {
- /** @var array Mapping of lock types to the type actually used */
- protected $lockTypeMap = [
- self::LOCK_SH => self::LOCK_SH,
- self::LOCK_UW => self::LOCK_SH,
- self::LOCK_EX => self::LOCK_EX
- ];
-
- protected function doGetLocksOnServer( $lockSrv, array $paths, $type ) {
- $status = Status::newGood();
- if ( !count( $paths ) ) {
- return $status; // nothing to lock
- }
-
- $db = $this->getConnection( $lockSrv ); // checked in isServerUp()
- $bigints = array_unique( array_map(
- function ( $key ) {
- return Wikimedia\base_convert( substr( $key, 0, 15 ), 16, 10 );
- },
- array_map( [ $this, 'sha1Base16Absolute' ], $paths )
- ) );
-
- // Try to acquire all the locks...
- $fields = [];
- foreach ( $bigints as $bigint ) {
- $fields[] = ( $type == self::LOCK_SH )
- ? "pg_try_advisory_lock_shared({$db->addQuotes( $bigint )}) AS K$bigint"
- : "pg_try_advisory_lock({$db->addQuotes( $bigint )}) AS K$bigint";
- }
- $res = $db->query( 'SELECT ' . implode( ', ', $fields ), __METHOD__ );
- $row = $res->fetchRow();
-
- if ( in_array( 'f', $row ) ) {
- // Release any acquired locks if some could not be acquired...
- $fields = [];
- foreach ( $row as $kbigint => $ok ) {
- if ( $ok === 't' ) { // locked
- $bigint = substr( $kbigint, 1 ); // strip off the "K"
- $fields[] = ( $type == self::LOCK_SH )
- ? "pg_advisory_unlock_shared({$db->addQuotes( $bigint )})"
- : "pg_advisory_unlock({$db->addQuotes( $bigint )})";
- }
- }
- if ( count( $fields ) ) {
- $db->query( 'SELECT ' . implode( ', ', $fields ), __METHOD__ );
- }
- foreach ( $paths as $path ) {
- $status->fatal( 'lockmanager-fail-acquirelock', $path );
- }
- }
-
- return $status;
- }
-
- /**
- * @see QuorumLockManager::releaseAllLocks()
- * @return Status
- */
- protected function releaseAllLocks() {
- $status = Status::newGood();
-
- foreach ( $this->conns as $lockDb => $db ) {
- try {
- $db->query( "SELECT pg_advisory_unlock_all()", __METHOD__ );
- } catch ( DBError $e ) {
- $status->fatal( 'lockmanager-fail-db-release', $lockDb );
- }
- }
-
- return $status;
- }
-}
--- /dev/null
+<?php
+/**
+ * MySQL version of DBLockManager that supports shared locks.
+ *
+ * All lock servers must have the innodb table defined in locking/filelocks.sql.
+ * All locks are non-blocking, which avoids deadlocks.
+ *
+ * @ingroup LockManager
+ */
+class MySqlLockManager extends DBLockManager {
+ /** @var array Mapping of lock types to the type actually used */
+ protected $lockTypeMap = [
+ self::LOCK_SH => self::LOCK_SH,
+ self::LOCK_UW => self::LOCK_SH,
+ self::LOCK_EX => self::LOCK_EX
+ ];
+
+ protected function getLocalLB() {
+ // Use a separate connection so releaseAllLocks() doesn't rollback the main trx
+ return wfGetLBFactory()->newMainLB( $this->domain );
+ }
+
+ protected function initConnection( $lockDb, IDatabase $db ) {
+ # Let this transaction see lock rows from other transactions
+ $db->query( "SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;" );
+ }
+
+ /**
+ * Get a connection to a lock DB and acquire locks on $paths.
+ * This does not use GET_LOCK() per http://bugs.mysql.com/bug.php?id=1118.
+ *
+ * @see DBLockManager::getLocksOnServer()
+ * @param string $lockSrv
+ * @param array $paths
+ * @param string $type
+ * @return Status
+ */
+ protected function doGetLocksOnServer( $lockSrv, array $paths, $type ) {
+ $status = Status::newGood();
+
+ $db = $this->getConnection( $lockSrv ); // checked in isServerUp()
+
+ $keys = []; // list of hash keys for the paths
+ $data = []; // list of rows to insert
+ $checkEXKeys = []; // list of hash keys that this has no EX lock on
+ # Build up values for INSERT clause
+ foreach ( $paths as $path ) {
+ $key = $this->sha1Base36Absolute( $path );
+ $keys[] = $key;
+ $data[] = [ 'fls_key' => $key, 'fls_session' => $this->session ];
+ if ( !isset( $this->locksHeld[$path][self::LOCK_EX] ) ) {
+ $checkEXKeys[] = $key;
+ }
+ }
+
+ # Block new writers (both EX and SH locks leave entries here)...
+ $db->insert( 'filelocks_shared', $data, __METHOD__, [ 'IGNORE' ] );
+ # Actually do the locking queries...
+ if ( $type == self::LOCK_SH ) { // reader locks
+ $blocked = false;
+ # Bail if there are any existing writers...
+ if ( count( $checkEXKeys ) ) {
+ $blocked = $db->selectField( 'filelocks_exclusive', '1',
+ [ 'fle_key' => $checkEXKeys ],
+ __METHOD__
+ );
+ }
+ # Other prospective writers that haven't yet updated filelocks_exclusive
+ # will recheck filelocks_shared after doing so and bail due to this entry.
+ } else { // writer locks
+ $encSession = $db->addQuotes( $this->session );
+ # Bail if there are any existing writers...
+ # This may detect readers, but the safe check for them is below.
+ # Note: if two writers come at the same time, both bail :)
+ $blocked = $db->selectField( 'filelocks_shared', '1',
+ [ 'fls_key' => $keys, "fls_session != $encSession" ],
+ __METHOD__
+ );
+ if ( !$blocked ) {
+ # Build up values for INSERT clause
+ $data = [];
+ foreach ( $keys as $key ) {
+ $data[] = [ 'fle_key' => $key ];
+ }
+ # Block new readers/writers...
+ $db->insert( 'filelocks_exclusive', $data, __METHOD__ );
+ # Bail if there are any existing readers...
+ $blocked = $db->selectField( 'filelocks_shared', '1',
+ [ 'fls_key' => $keys, "fls_session != $encSession" ],
+ __METHOD__
+ );
+ }
+ }
+
+ if ( $blocked ) {
+ foreach ( $paths as $path ) {
+ $status->fatal( 'lockmanager-fail-acquirelock', $path );
+ }
+ }
+
+ return $status;
+ }
+
+ /**
+ * @see QuorumLockManager::releaseAllLocks()
+ * @return Status
+ */
+ protected function releaseAllLocks() {
+ $status = Status::newGood();
+
+ foreach ( $this->conns as $lockDb => $db ) {
+ if ( $db->trxLevel() ) { // in transaction
+ try {
+ $db->rollback( __METHOD__ ); // finish transaction and kill any rows
+ } catch ( DBError $e ) {
+ $status->fatal( 'lockmanager-fail-db-release', $lockDb );
+ }
+ }
+ }
+
+ return $status;
+ }
+}
--- /dev/null
+<?php
+/**
+ * PostgreSQL version of DBLockManager that supports shared locks.
+ * All locks are non-blocking, which avoids deadlocks.
+ *
+ * @ingroup LockManager
+ */
+class PostgreSqlLockManager extends DBLockManager {
+ /** @var array Mapping of lock types to the type actually used */
+ protected $lockTypeMap = [
+ self::LOCK_SH => self::LOCK_SH,
+ self::LOCK_UW => self::LOCK_SH,
+ self::LOCK_EX => self::LOCK_EX
+ ];
+
+ protected function doGetLocksOnServer( $lockSrv, array $paths, $type ) {
+ $status = Status::newGood();
+ if ( !count( $paths ) ) {
+ return $status; // nothing to lock
+ }
+
+ $db = $this->getConnection( $lockSrv ); // checked in isServerUp()
+ $bigints = array_unique( array_map(
+ function ( $key ) {
+ return Wikimedia\base_convert( substr( $key, 0, 15 ), 16, 10 );
+ },
+ array_map( [ $this, 'sha1Base16Absolute' ], $paths )
+ ) );
+
+ // Try to acquire all the locks...
+ $fields = [];
+ foreach ( $bigints as $bigint ) {
+ $fields[] = ( $type == self::LOCK_SH )
+ ? "pg_try_advisory_lock_shared({$db->addQuotes( $bigint )}) AS K$bigint"
+ : "pg_try_advisory_lock({$db->addQuotes( $bigint )}) AS K$bigint";
+ }
+ $res = $db->query( 'SELECT ' . implode( ', ', $fields ), __METHOD__ );
+ $row = $res->fetchRow();
+
+ if ( in_array( 'f', $row ) ) {
+ // Release any acquired locks if some could not be acquired...
+ $fields = [];
+ foreach ( $row as $kbigint => $ok ) {
+ if ( $ok === 't' ) { // locked
+ $bigint = substr( $kbigint, 1 ); // strip off the "K"
+ $fields[] = ( $type == self::LOCK_SH )
+ ? "pg_advisory_unlock_shared({$db->addQuotes( $bigint )})"
+ : "pg_advisory_unlock({$db->addQuotes( $bigint )})";
+ }
+ }
+ if ( count( $fields ) ) {
+ $db->query( 'SELECT ' . implode( ', ', $fields ), __METHOD__ );
+ }
+ foreach ( $paths as $path ) {
+ $status->fatal( 'lockmanager-fail-acquirelock', $path );
+ }
+ }
+
+ return $status;
+ }
+
+ /**
+ * @see QuorumLockManager::releaseAllLocks()
+ * @return Status
+ */
+ protected function releaseAllLocks() {
+ $status = Status::newGood();
+
+ foreach ( $this->conns as $lockDb => $db ) {
+ try {
+ $db->query( "SELECT pg_advisory_unlock_all()", __METHOD__ );
+ } catch ( DBError $e ) {
+ $status->fatal( 'lockmanager-fail-db-release', $lockDb );
+ }
+ }
+
+ return $status;
+ }
+}
dépôts / lhc / web / wiklou.git / commitdiff