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25d1410592
This patch to the suspend code - like the similar change for resume - queries the lock mode of a cluster volume and records whether it is active exclusively. This is necessary for suspend due to the possibility of preloading targets. Failure to check to exclusivity causes the cluster target of an exclusively activated mirror to be used when converting - rather than the single machine target.
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "locking.h"
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#include "locking_types.h"
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#include "lvm-string.h"
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#include "activate.h"
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#include <signal.h>
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/*
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* No locking
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*/
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static void _no_fin_locking(void)
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{
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}
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static void _no_reset_locking(void)
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{
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}
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static int _no_lock_resource(struct cmd_context *cmd, const char *resource,
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uint32_t flags)
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{
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switch (flags & LCK_SCOPE_MASK) {
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case LCK_VG:
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if (!strcmp(resource, VG_SYNC_NAMES))
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fs_unlock();
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break;
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case LCK_LV:
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switch (flags & LCK_TYPE_MASK) {
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case LCK_NULL:
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return lv_deactivate(cmd, resource);
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case LCK_UNLOCK:
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return lv_resume_if_active(cmd, resource, (flags & LCK_ORIGIN_ONLY) ? 1: 0, 0, (flags & LCK_REVERT) ? 1 : 0);
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case LCK_READ:
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return lv_activate_with_filter(cmd, resource, 0);
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case LCK_WRITE:
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return lv_suspend_if_active(cmd, resource, (flags & LCK_ORIGIN_ONLY) ? 1 : 0, 0);
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case LCK_EXCL:
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return lv_activate_with_filter(cmd, resource, 1);
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default:
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break;
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}
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break;
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default:
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log_error("Unrecognised lock scope: %d",
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flags & LCK_SCOPE_MASK);
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return 0;
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}
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return 1;
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}
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static int _readonly_lock_resource(struct cmd_context *cmd,
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const char *resource,
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uint32_t flags)
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{
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if ((flags & LCK_TYPE_MASK) == LCK_WRITE &&
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(flags & LCK_SCOPE_MASK) == LCK_VG &&
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!(flags & LCK_CACHE) &&
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strcmp(resource, VG_GLOBAL)) {
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log_error("Write locks are prohibited with read-only locking.");
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return 0;
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}
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return _no_lock_resource(cmd, resource, flags);
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}
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int init_no_locking(struct locking_type *locking, struct cmd_context *cmd __attribute__((unused)),
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int suppress_messages)
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{
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locking->lock_resource = _no_lock_resource;
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locking->reset_locking = _no_reset_locking;
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locking->fin_locking = _no_fin_locking;
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locking->flags = LCK_CLUSTERED;
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return 1;
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}
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int init_readonly_locking(struct locking_type *locking, struct cmd_context *cmd __attribute__((unused)),
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int suppress_messages)
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{
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locking->lock_resource = _readonly_lock_resource;
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locking->reset_locking = _no_reset_locking;
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locking->fin_locking = _no_fin_locking;
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locking->flags = 0;
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return 1;
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}
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