/* $NetBSD: no_locking.c,v 1.1.1.2 2009/12/02 00:26:24 haad Exp $ */ /* * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. * * This file is part of LVM2. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU Lesser General Public License v.2.1. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "lib.h" #include "locking.h" #include "locking_types.h" #include "lvm-string.h" #include "activate.h" #include /* * No locking */ static void _no_fin_locking(void) { return; } static void _no_reset_locking(void) { return; } static int _no_lock_resource(struct cmd_context *cmd, const char *resource, uint32_t flags) { switch (flags & LCK_SCOPE_MASK) { case LCK_VG: break; case LCK_LV: switch (flags & LCK_TYPE_MASK) { case LCK_NULL: return lv_deactivate(cmd, resource); case LCK_UNLOCK: return lv_resume_if_active(cmd, resource); case LCK_READ: return lv_activate_with_filter(cmd, resource, 0); case LCK_WRITE: return lv_suspend_if_active(cmd, resource); case LCK_EXCL: return lv_activate_with_filter(cmd, resource, 1); default: break; } break; default: log_error("Unrecognised lock scope: %d", flags & LCK_SCOPE_MASK); return 0; } return 1; } static int _readonly_lock_resource(struct cmd_context *cmd, const char *resource, uint32_t flags) { if ((flags & LCK_TYPE_MASK) == LCK_WRITE && (flags & LCK_SCOPE_MASK) == LCK_VG && !(flags & LCK_CACHE) && strcmp(resource, VG_GLOBAL)) { log_error("Write locks are prohibited with --ignorelockingfailure."); return 0; } return _no_lock_resource(cmd, resource, flags); } int init_no_locking(struct locking_type *locking, struct cmd_context *cmd __attribute((unused))) { locking->lock_resource = _no_lock_resource; locking->reset_locking = _no_reset_locking; locking->fin_locking = _no_fin_locking; locking->flags = LCK_CLUSTERED; return 1; } int init_readonly_locking(struct locking_type *locking, struct cmd_context *cmd __attribute((unused))) { locking->lock_resource = _readonly_lock_resource; locking->reset_locking = _no_reset_locking; locking->fin_locking = _no_fin_locking; locking->flags = 0; return 1; }