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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:11:40 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 11:11:40 +0000
commit7731832751ab9f3c6ddeb66f186d3d7fa1934a6d (patch)
treee91015872543a59be2aad26c2fea02e41b57005d /servers/slapd/alock.c
parentInitial commit. (diff)
downloadopenldap-7731832751ab9f3c6ddeb66f186d3d7fa1934a6d.tar.xz
openldap-7731832751ab9f3c6ddeb66f186d3d7fa1934a6d.zip
Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--servers/slapd/alock.c718
1 files changed, 718 insertions, 0 deletions
diff --git a/servers/slapd/alock.c b/servers/slapd/alock.c
new file mode 100644
index 0000000..26406d5
--- /dev/null
+++ b/servers/slapd/alock.c
@@ -0,0 +1,718 @@
+/* alock.c - access lock library */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2005-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2004-2005 Symas Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Emily Backes at Symas
+ * Corporation for inclusion in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#if SLAPD_BDB || SLAPD_HDB
+
+#include <lber.h>
+#include "alock.h"
+#include "lutil.h"
+
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/unistd.h>
+#include <ac/errno.h>
+#include <ac/assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+#include <fcntl.h>
+
+#ifdef _WIN32
+#include <windows.h>
+#include <stdio.h>
+#include <io.h>
+#endif
+
+
+static int
+alock_grab_lock ( int fd, int slot )
+{
+ int res;
+
+#if defined( HAVE_LOCKF )
+ res = lseek (fd, (off_t) (ALOCK_SLOT_SIZE * slot), SEEK_SET);
+ if (res == -1) return -1;
+ res = lockf (fd, F_LOCK, (off_t) ALOCK_SLOT_SIZE);
+#elif defined( HAVE_FCNTL )
+ struct flock lock_info;
+ (void) memset ((void *) &lock_info, 0, sizeof (struct flock));
+
+ lock_info.l_type = F_WRLCK;
+ lock_info.l_whence = SEEK_SET;
+ lock_info.l_start = (off_t) (ALOCK_SLOT_SIZE * slot);
+ lock_info.l_len = (off_t) ALOCK_SLOT_SIZE;
+
+ res = fcntl (fd, F_SETLKW, &lock_info);
+#elif defined( _WIN32 )
+ OVERLAPPED ov;
+ HANDLE hh = _get_osfhandle ( fd );
+ ov.hEvent = 0;
+ ov.Offset = ALOCK_SLOT_SIZE*slot;
+ ov.OffsetHigh = 0;
+ res = LockFileEx( hh, LOCKFILE_EXCLUSIVE_LOCK, 0,
+ ALOCK_SLOT_SIZE, 0, &ov ) ? 0 : -1;
+#else
+# error alock needs lockf, fcntl, or LockFile[Ex]
+#endif
+ if (res == -1) {
+ assert (errno != EDEADLK);
+ return -1;
+ }
+ return 0;
+}
+
+static int
+alock_release_lock ( int fd, int slot )
+{
+ int res;
+
+#if defined( HAVE_LOCKF )
+ res = lseek (fd, (off_t) (ALOCK_SLOT_SIZE * slot), SEEK_SET);
+ if (res == -1) return -1;
+ res = lockf (fd, F_ULOCK, (off_t) ALOCK_SLOT_SIZE);
+ if (res == -1) return -1;
+#elif defined ( HAVE_FCNTL )
+ struct flock lock_info;
+ (void) memset ((void *) &lock_info, 0, sizeof (struct flock));
+
+ lock_info.l_type = F_UNLCK;
+ lock_info.l_whence = SEEK_SET;
+ lock_info.l_start = (off_t) (ALOCK_SLOT_SIZE * slot);
+ lock_info.l_len = (off_t) ALOCK_SLOT_SIZE;
+
+ res = fcntl (fd, F_SETLKW, &lock_info);
+ if (res == -1) return -1;
+#elif defined( _WIN32 )
+ HANDLE hh = _get_osfhandle ( fd );
+ if ( !UnlockFile ( hh, ALOCK_SLOT_SIZE*slot, 0,
+ ALOCK_SLOT_SIZE, 0 ))
+ return -1;
+#else
+# error alock needs lockf, fcntl, or LockFile[Ex]
+#endif
+
+ return 0;
+}
+
+static int
+alock_share_lock ( int fd, int slot )
+{
+ int res;
+
+#if defined( HAVE_LOCKF )
+ res = 0; /* lockf has no shared locks */
+#elif defined ( HAVE_FCNTL )
+ struct flock lock_info;
+ (void) memset ((void *) &lock_info, 0, sizeof (struct flock));
+
+ /* The shared lock replaces the existing lock */
+ lock_info.l_type = F_RDLCK;
+ lock_info.l_whence = SEEK_SET;
+ lock_info.l_start = (off_t) (ALOCK_SLOT_SIZE * slot);
+ lock_info.l_len = (off_t) ALOCK_SLOT_SIZE;
+
+ res = fcntl (fd, F_SETLK, &lock_info);
+ if (res == -1) return -1;
+#elif defined( _WIN32 )
+ OVERLAPPED ov;
+ HANDLE hh = _get_osfhandle ( fd );
+
+ /* Windows locks are mandatory, not advisory.
+ * We must downgrade the lock to allow future
+ * callers to read the slot data.
+ *
+ * First acquire a shared lock. Unlock will
+ * release the existing exclusive lock.
+ */
+ ov.hEvent = 0;
+ ov.Offset = ALOCK_SLOT_SIZE*slot;
+ ov.OffsetHigh = 0;
+ LockFileEx (hh, 0, 0, ALOCK_SLOT_SIZE, 0, &ov);
+ UnlockFile (hh, ALOCK_SLOT_SIZE*slot, 0, ALOCK_SLOT_SIZE, 0);
+#else
+# error alock needs lockf, fcntl, or LockFile[Ex]
+#endif
+
+ return 0;
+}
+
+static int
+alock_test_lock ( int fd, int slot )
+{
+ int res;
+
+#if defined( HAVE_LOCKF )
+ res = lseek (fd, (off_t) (ALOCK_SLOT_SIZE * slot), SEEK_SET);
+ if (res == -1) return -1;
+
+ res = lockf (fd, F_TEST, (off_t) ALOCK_SLOT_SIZE);
+ if (res == -1) {
+ if (errno == EACCES || errno == EAGAIN) {
+ return ALOCK_LOCKED;
+ } else {
+ return -1;
+ }
+ }
+#elif defined( HAVE_FCNTL )
+ struct flock lock_info;
+ (void) memset ((void *) &lock_info, 0, sizeof (struct flock));
+
+ lock_info.l_type = F_WRLCK;
+ lock_info.l_whence = SEEK_SET;
+ lock_info.l_start = (off_t) (ALOCK_SLOT_SIZE * slot);
+ lock_info.l_len = (off_t) ALOCK_SLOT_SIZE;
+
+ res = fcntl (fd, F_GETLK, &lock_info);
+ if (res == -1) return -1;
+
+ if (lock_info.l_type != F_UNLCK) return ALOCK_LOCKED;
+#elif defined( _WIN32 )
+ OVERLAPPED ov;
+ HANDLE hh = _get_osfhandle ( fd );
+ ov.hEvent = 0;
+ ov.Offset = ALOCK_SLOT_SIZE*slot;
+ ov.OffsetHigh = 0;
+ if( !LockFileEx( hh,
+ LOCKFILE_EXCLUSIVE_LOCK|LOCKFILE_FAIL_IMMEDIATELY, 0,
+ ALOCK_SLOT_SIZE, 0, &ov )) {
+ int err = GetLastError();
+ if ( err == ERROR_LOCK_VIOLATION )
+ return ALOCK_LOCKED;
+ else
+ return -1;
+ }
+#else
+# error alock needs lockf, fcntl, or LockFile
+#endif
+
+ return 0;
+}
+
+/* Read a 64bit LE value */
+static unsigned long int
+alock_read_iattr ( unsigned char * bufptr )
+{
+ unsigned long int val = 0;
+ int count;
+
+ assert (bufptr != NULL);
+
+ bufptr += sizeof (unsigned long int);
+ for (count=0; count <= (int) sizeof (unsigned long int); ++count) {
+ val <<= 8;
+ val += (unsigned long int) *bufptr--;
+ }
+
+ return val;
+}
+
+/* Write a 64bit LE value */
+static void
+alock_write_iattr ( unsigned char * bufptr,
+ unsigned long int val )
+{
+ int count;
+
+ assert (bufptr != NULL);
+
+ for (count=0; count < 8; ++count) {
+ *bufptr++ = (unsigned char) (val & 0xff);
+ val >>= 8;
+ }
+}
+
+static int
+alock_read_slot ( alock_info_t * info,
+ alock_slot_t * slot_data )
+{
+ unsigned char slotbuf [ALOCK_SLOT_SIZE];
+ int res, size, size_total, err;
+
+ assert (info != NULL);
+ assert (slot_data != NULL);
+ assert (info->al_slot > 0);
+
+ res = lseek (info->al_fd,
+ (off_t) (ALOCK_SLOT_SIZE * info->al_slot),
+ SEEK_SET);
+ if (res == -1) return -1;
+
+ size_total = 0;
+ while (size_total < ALOCK_SLOT_SIZE) {
+ size = read (info->al_fd,
+ slotbuf + size_total,
+ ALOCK_SLOT_SIZE - size_total);
+ if (size == 0) return -1;
+ if (size < 0) {
+ err = errno;
+ if (err != EINTR && err != EAGAIN) return -1;
+ } else {
+ size_total += size;
+ }
+ }
+
+ if (alock_read_iattr (slotbuf) != ALOCK_MAGIC) {
+ return -1;
+ }
+ slot_data->al_lock = alock_read_iattr (slotbuf+8);
+ slot_data->al_stamp = alock_read_iattr (slotbuf+16);
+ slot_data->al_pid = alock_read_iattr (slotbuf+24);
+
+ if (slot_data->al_appname) ber_memfree (slot_data->al_appname);
+ slot_data->al_appname = ber_memcalloc (1, ALOCK_MAX_APPNAME);
+ if (slot_data->al_appname == NULL) {
+ return -1;
+ }
+ strncpy (slot_data->al_appname, (char *)slotbuf+32, ALOCK_MAX_APPNAME-1);
+ (slot_data->al_appname) [ALOCK_MAX_APPNAME-1] = '\0';
+
+ return 0;
+}
+
+static int
+alock_write_slot ( alock_info_t * info,
+ alock_slot_t * slot_data )
+{
+ unsigned char slotbuf [ALOCK_SLOT_SIZE];
+ int res, size, size_total, err;
+
+ assert (info != NULL);
+ assert (slot_data != NULL);
+ assert (info->al_slot > 0);
+
+ (void) memset ((void *) slotbuf, 0, ALOCK_SLOT_SIZE);
+
+ alock_write_iattr (slotbuf, ALOCK_MAGIC);
+ assert (alock_read_iattr (slotbuf) == ALOCK_MAGIC);
+ alock_write_iattr (slotbuf+8, slot_data->al_lock);
+ alock_write_iattr (slotbuf+16, slot_data->al_stamp);
+ alock_write_iattr (slotbuf+24, slot_data->al_pid);
+
+ if (slot_data->al_appname)
+ strncpy ((char *)slotbuf+32, slot_data->al_appname, ALOCK_MAX_APPNAME-1);
+ slotbuf[ALOCK_SLOT_SIZE-1] = '\0';
+
+ res = lseek (info->al_fd,
+ (off_t) (ALOCK_SLOT_SIZE * info->al_slot),
+ SEEK_SET);
+ if (res == -1) return -1;
+
+ size_total = 0;
+ while (size_total < ALOCK_SLOT_SIZE) {
+ size = write (info->al_fd,
+ slotbuf + size_total,
+ ALOCK_SLOT_SIZE - size_total);
+ if (size == 0) return -1;
+ if (size < 0) {
+ err = errno;
+ if (err != EINTR && err != EAGAIN) return -1;
+ } else {
+ size_total += size;
+ }
+ }
+
+ return 0;
+}
+
+static int
+alock_query_slot ( alock_info_t * info )
+{
+ int res, nosave;
+ alock_slot_t slot_data;
+
+ assert (info != NULL);
+ assert (info->al_slot > 0);
+
+ (void) memset ((void *) &slot_data, 0, sizeof (alock_slot_t));
+ alock_read_slot (info, &slot_data);
+
+ if (slot_data.al_appname != NULL) ber_memfree (slot_data.al_appname);
+ slot_data.al_appname = NULL;
+
+ nosave = slot_data.al_lock & ALOCK_NOSAVE;
+
+ if ((slot_data.al_lock & ALOCK_SMASK) == ALOCK_UNLOCKED)
+ return slot_data.al_lock;
+
+ res = alock_test_lock (info->al_fd, info->al_slot);
+ if (res < 0) return -1;
+ if (res > 0) {
+ if ((slot_data.al_lock & ALOCK_SMASK) == ALOCK_UNIQUE) {
+ return slot_data.al_lock;
+ } else {
+ return ALOCK_LOCKED | nosave;
+ }
+ }
+
+ return ALOCK_DIRTY | nosave;
+}
+
+int
+alock_open ( alock_info_t * info,
+ const char * appname,
+ const char * envdir,
+ int locktype )
+{
+ struct stat statbuf;
+ alock_info_t scan_info;
+ alock_slot_t slot_data;
+ char * filename;
+ int res, max_slot;
+ int dirty_count, live_count, nosave;
+ char *ptr;
+
+ assert (info != NULL);
+ assert (appname != NULL);
+ assert (envdir != NULL);
+ assert ((locktype & ALOCK_SMASK) >= 1 && (locktype & ALOCK_SMASK) <= 2);
+
+ slot_data.al_lock = locktype;
+ slot_data.al_stamp = time(NULL);
+ slot_data.al_pid = getpid();
+ slot_data.al_appname = ber_memcalloc (1, ALOCK_MAX_APPNAME);
+ if (slot_data.al_appname == NULL) {
+ return ALOCK_UNSTABLE;
+ }
+ strncpy (slot_data.al_appname, appname, ALOCK_MAX_APPNAME-1);
+ slot_data.al_appname [ALOCK_MAX_APPNAME-1] = '\0';
+
+ filename = ber_memcalloc (1, strlen (envdir) + strlen ("/alock") + 1);
+ if (filename == NULL ) {
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+ ptr = lutil_strcopy(filename, envdir);
+ lutil_strcopy(ptr, "/alock");
+#ifdef _WIN32
+ { HANDLE handle = CreateFile (filename, GENERIC_READ|GENERIC_WRITE,
+ FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS,
+ FILE_ATTRIBUTE_NORMAL, NULL);
+ info->al_fd = _open_osfhandle (handle, 0);
+ }
+#else
+ info->al_fd = open (filename, O_CREAT|O_RDWR, 0666);
+#endif
+ ber_memfree (filename);
+ if (info->al_fd < 0) {
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+ info->al_slot = 0;
+
+ res = alock_grab_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+
+ res = fstat (info->al_fd, &statbuf);
+ if (res == -1) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+
+ max_slot = (statbuf.st_size + ALOCK_SLOT_SIZE - 1) / ALOCK_SLOT_SIZE;
+ dirty_count = 0;
+ live_count = 0;
+ nosave = 0;
+ scan_info.al_fd = info->al_fd;
+ for (scan_info.al_slot = 1;
+ scan_info.al_slot < max_slot;
+ ++ scan_info.al_slot) {
+ if (scan_info.al_slot != info->al_slot) {
+ res = alock_query_slot (&scan_info);
+
+ if (res & ALOCK_NOSAVE) {
+ nosave = ALOCK_NOSAVE;
+ res ^= ALOCK_NOSAVE;
+ }
+ if (res == ALOCK_UNLOCKED
+ && info->al_slot == 0) {
+ info->al_slot = scan_info.al_slot;
+
+ } else if (res == ALOCK_LOCKED) {
+ ++live_count;
+
+ } else if (res == ALOCK_UNIQUE
+ && (( locktype & ALOCK_SMASK ) == ALOCK_UNIQUE
+ || nosave )) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_BUSY;
+
+ } else if (res == ALOCK_DIRTY) {
+ ++dirty_count;
+
+ } else if (res == -1) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+
+ }
+ }
+ }
+
+ if (dirty_count && live_count) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+
+ if (info->al_slot == 0) info->al_slot = max_slot + 1;
+ res = alock_grab_lock (info->al_fd,
+ info->al_slot);
+ if (res == -1) {
+ close (info->al_fd);
+ ber_memfree (slot_data.al_appname);
+ return ALOCK_UNSTABLE;
+ }
+ res = alock_write_slot (info, &slot_data);
+ ber_memfree (slot_data.al_appname);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+ alock_share_lock (info->al_fd, info->al_slot);
+
+ res = alock_release_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ if (dirty_count) return ALOCK_RECOVER | nosave;
+ return ALOCK_CLEAN | nosave;
+}
+
+int
+alock_scan ( alock_info_t * info )
+{
+ struct stat statbuf;
+ alock_info_t scan_info;
+ int res, max_slot;
+ int dirty_count, live_count, nosave;
+
+ assert (info != NULL);
+
+ scan_info.al_fd = info->al_fd;
+
+ res = alock_grab_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ res = fstat (info->al_fd, &statbuf);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ max_slot = (statbuf.st_size + ALOCK_SLOT_SIZE - 1) / ALOCK_SLOT_SIZE;
+ dirty_count = 0;
+ live_count = 0;
+ nosave = 0;
+ for (scan_info.al_slot = 1;
+ scan_info.al_slot < max_slot;
+ ++ scan_info.al_slot) {
+ if (scan_info.al_slot != info->al_slot) {
+ res = alock_query_slot (&scan_info);
+
+ if (res & ALOCK_NOSAVE) {
+ nosave = ALOCK_NOSAVE;
+ res ^= ALOCK_NOSAVE;
+ }
+
+ if (res == ALOCK_LOCKED) {
+ ++live_count;
+
+ } else if (res == ALOCK_DIRTY) {
+ ++dirty_count;
+
+ } else if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+
+ }
+ }
+ }
+
+ res = alock_release_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ if (dirty_count) {
+ if (live_count) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ } else {
+ return ALOCK_RECOVER | nosave;
+ }
+ }
+
+ return ALOCK_CLEAN | nosave;
+}
+
+int
+alock_close ( alock_info_t * info, int nosave )
+{
+ alock_slot_t slot_data;
+ int res;
+
+ if ( !info->al_slot )
+ return ALOCK_CLEAN;
+
+ (void) memset ((void *) &slot_data, 0, sizeof(alock_slot_t));
+
+ res = alock_grab_lock (info->al_fd, 0);
+ if (res == -1) {
+fail:
+ /* Windows doesn't clean up locks immediately when a process exits.
+ * Make sure we release our locks, to prevent stale locks from
+ * hanging around.
+ */
+ alock_release_lock (info->al_fd, 0);
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ /* mark our slot as clean */
+ res = alock_read_slot (info, &slot_data);
+ if (res == -1) {
+ if (slot_data.al_appname != NULL)
+ ber_memfree (slot_data.al_appname);
+ goto fail;
+ }
+ slot_data.al_lock = ALOCK_UNLOCKED;
+ if ( nosave )
+ slot_data.al_lock |= ALOCK_NOSAVE;
+ /* since we have slot 0 locked, we don't need our slot lock */
+ res = alock_release_lock (info->al_fd, info->al_slot);
+ if (res == -1) {
+ goto fail;
+ }
+ res = alock_write_slot (info, &slot_data);
+ if (res == -1) {
+ if (slot_data.al_appname != NULL)
+ ber_memfree (slot_data.al_appname);
+ goto fail;
+ }
+ if (slot_data.al_appname != NULL) {
+ ber_memfree (slot_data.al_appname);
+ slot_data.al_appname = NULL;
+ }
+
+ res = alock_release_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ res = close (info->al_fd);
+ if (res == -1) return ALOCK_UNSTABLE;
+
+ return ALOCK_CLEAN;
+}
+
+int
+alock_recover ( alock_info_t * info )
+{
+ struct stat statbuf;
+ alock_slot_t slot_data;
+ alock_info_t scan_info;
+ int res, max_slot;
+
+ assert (info != NULL);
+
+ scan_info.al_fd = info->al_fd;
+
+ (void) memset ((void *) &slot_data, 0, sizeof(alock_slot_t));
+
+ res = alock_grab_lock (info->al_fd, 0);
+ if (res == -1) {
+ goto fail;
+ }
+
+ res = fstat (info->al_fd, &statbuf);
+ if (res == -1) {
+ goto fail;
+ }
+
+ max_slot = (statbuf.st_size + ALOCK_SLOT_SIZE - 1) / ALOCK_SLOT_SIZE;
+ for (scan_info.al_slot = 1;
+ scan_info.al_slot < max_slot;
+ ++ scan_info.al_slot) {
+ if (scan_info.al_slot != info->al_slot) {
+ res = alock_query_slot (&scan_info) & ~ALOCK_NOSAVE;
+
+ if (res == ALOCK_LOCKED
+ || res == ALOCK_UNIQUE) {
+ /* recovery attempt on an active db? */
+ goto fail;
+
+ } else if (res == ALOCK_DIRTY) {
+ /* mark it clean */
+ res = alock_read_slot (&scan_info, &slot_data);
+ if (res == -1) {
+ goto fail;
+ }
+ slot_data.al_lock = ALOCK_UNLOCKED;
+ res = alock_write_slot (&scan_info, &slot_data);
+ if (res == -1) {
+ if (slot_data.al_appname != NULL)
+ ber_memfree (slot_data.al_appname);
+ goto fail;
+ }
+ if (slot_data.al_appname != NULL) {
+ ber_memfree (slot_data.al_appname);
+ slot_data.al_appname = NULL;
+ }
+
+ } else if (res == -1) {
+ goto fail;
+
+ }
+ }
+ }
+
+ res = alock_release_lock (info->al_fd, 0);
+ if (res == -1) {
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+ }
+
+ return ALOCK_CLEAN;
+
+fail:
+ alock_release_lock (info->al_fd, 0);
+ close (info->al_fd);
+ return ALOCK_UNSTABLE;
+}
+
+#endif /* SLAPD_BDB || SLAPD_HDB */