mirror of
https://gitlab.com/libvirt/libvirt.git
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1797128ef6
Add security driver functions to label separate storage images using the virStorageSource definition. This will help to avoid the need to do ugly changes to the disk struct and use the source directly.
652 lines
18 KiB
C
652 lines
18 KiB
C
/*
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* Copyright (C) 2010-2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Stacked security driver
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*/
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#include <config.h>
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#include "security_stack.h"
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#include "virerror.h"
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#include "viralloc.h"
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#define VIR_FROM_THIS VIR_FROM_SECURITY
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typedef struct _virSecurityStackData virSecurityStackData;
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typedef virSecurityStackData *virSecurityStackDataPtr;
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typedef struct _virSecurityStackItem virSecurityStackItem;
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typedef virSecurityStackItem *virSecurityStackItemPtr;
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struct _virSecurityStackItem {
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virSecurityManagerPtr securityManager;
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virSecurityStackItemPtr next;
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};
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struct _virSecurityStackData {
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virSecurityStackItemPtr itemsHead;
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};
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int
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virSecurityStackAddNested(virSecurityManagerPtr mgr,
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virSecurityManagerPtr nested)
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{
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virSecurityStackItemPtr item = NULL;
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr tmp;
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tmp = priv->itemsHead;
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while (tmp && tmp->next)
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tmp = tmp->next;
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if (VIR_ALLOC(item) < 0)
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return -1;
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item->securityManager = nested;
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if (tmp)
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tmp->next = item;
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else
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priv->itemsHead = item;
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return 0;
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}
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virSecurityManagerPtr
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virSecurityStackGetPrimary(virSecurityManagerPtr mgr)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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return priv->itemsHead->securityManager;
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}
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static virSecurityDriverStatus
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virSecurityStackProbe(const char *virtDriver ATTRIBUTE_UNUSED)
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{
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return SECURITY_DRIVER_ENABLE;
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}
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static int
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virSecurityStackOpen(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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static int
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virSecurityStackClose(virSecurityManagerPtr mgr)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr next, item = priv->itemsHead;
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while (item) {
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next = item->next;
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virObjectUnref(item->securityManager);
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VIR_FREE(item);
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item = next;
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}
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return 0;
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}
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static const char *
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virSecurityStackGetModel(virSecurityManagerPtr mgr)
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{
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return virSecurityManagerGetModel(virSecurityStackGetPrimary(mgr));
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}
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static const char *
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virSecurityStackGetDOI(virSecurityManagerPtr mgr)
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{
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return virSecurityManagerGetDOI(virSecurityStackGetPrimary(mgr));
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}
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static int
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virSecurityStackPreFork(virSecurityManagerPtr mgr)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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/* XXX For now, we rely on no driver having any state that requires
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* rollback if a later driver in the stack fails; if this changes,
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* we'd need to split this into transaction semantics by dividing
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* the work into prepare/commit/abort. */
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for (; item; item = item->next) {
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if (virSecurityManagerPreFork(item->securityManager) < 0) {
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rc = -1;
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break;
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}
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/* Undo the unbalanced locking left behind after recursion; if
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* PostFork ever delegates to driver callbacks, we'd instead
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* need to recurse to an internal method that does not regrab
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* a lock. */
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virSecurityManagerPostFork(item->securityManager);
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}
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return rc;
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}
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static int
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virSecurityStackVerify(virSecurityManagerPtr mgr,
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virDomainDefPtr def)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerVerify(item->securityManager, def) < 0) {
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rc = -1;
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break;
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}
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}
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return rc;
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}
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static int
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virSecurityStackGenLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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int rc = 0;
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if (virSecurityManagerGenLabel(virSecurityStackGetPrimary(mgr), vm) < 0)
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rc = -1;
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// TODO
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#if 0
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/* We don't allow secondary drivers to generate labels.
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* This may have to change in the future, but requires
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* changes elsewhere in domain_conf.c and capabilities.c
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* XML formats first, to allow recording of multiple
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* labels
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*/
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if (virSecurityManagerGenLabel(priv->secondary, vm) < 0)
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rc = -1;
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#endif
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return rc;
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}
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static int
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virSecurityStackReleaseLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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int rc = 0;
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if (virSecurityManagerReleaseLabel(virSecurityStackGetPrimary(mgr), vm) < 0)
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rc = -1;
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// TODO
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#if 0
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/* XXX See note in GenLabel */
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if (virSecurityManagerReleaseLabel(priv->secondary, vm) < 0)
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rc = -1;
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#endif
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return rc;
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}
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static int
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virSecurityStackReserveLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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pid_t pid)
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{
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int rc = 0;
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if (virSecurityManagerReserveLabel(virSecurityStackGetPrimary(mgr), vm, pid) < 0)
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rc = -1;
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// TODO
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#if 0
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/* XXX See note in GenLabel */
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if (virSecurityManagerReserveLabel(priv->secondary, vm, pid) < 0)
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rc = -1;
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#endif
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return rc;
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}
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static int
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virSecurityStackSetSecurityDiskLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virDomainDiskDefPtr disk)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetDiskLabel(item->securityManager, vm, disk) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackRestoreSecurityDiskLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virDomainDiskDefPtr disk)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerRestoreDiskLabel(item->securityManager, vm, disk) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetSecurityHostdevLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virDomainHostdevDefPtr dev,
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const char *vroot)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetHostdevLabel(item->securityManager,
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vm,
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dev,
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vroot) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackRestoreSecurityHostdevLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virDomainHostdevDefPtr dev,
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const char *vroot)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerRestoreHostdevLabel(item->securityManager,
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vm,
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dev,
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vroot) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetSecurityAllLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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const char *stdin_path)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetAllLabel(item->securityManager, vm, stdin_path) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackRestoreSecurityAllLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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bool migrated)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerRestoreAllLabel(item->securityManager, vm, migrated) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetSavedStateLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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const char *savefile)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetSavedStateLabel(item->securityManager, vm, savefile) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackRestoreSavedStateLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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const char *savefile)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerRestoreSavedStateLabel(item->securityManager, vm, savefile) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetProcessLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetProcessLabel(item->securityManager, vm) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetChildProcessLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virCommandPtr cmd)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetChildProcessLabel(item->securityManager, vm, cmd) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackGetProcessLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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pid_t pid,
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virSecurityLabelPtr seclabel)
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{
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int rc = 0;
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// TODO
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#if 0
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if (virSecurityManagerGetProcessLabel(priv->secondary, vm, pid, seclabel) < 0)
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rc = -1;
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#endif
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if (virSecurityManagerGetProcessLabel(virSecurityStackGetPrimary(mgr), vm, pid, seclabel) < 0)
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rc = -1;
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return rc;
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}
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static int
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virSecurityStackSetDaemonSocketLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetDaemonSocketLabel(item->securityManager, vm) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetSocketLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetSocketLabel(item->securityManager, vm) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackClearSocketLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerClearSocketLabel(item->securityManager, vm) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetImageFDLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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int fd)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetImageFDLabel(item->securityManager, vm, fd) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetTapFDLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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int fd)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetTapFDLabel(item->securityManager, vm, fd) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackSetHugepages(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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const char *path)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetHugepages(item->securityManager, vm, path) < 0)
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rc = -1;
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}
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return rc;
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}
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static char *
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virSecurityStackGetMountOptions(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
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virDomainDefPtr vm ATTRIBUTE_UNUSED)
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{
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return NULL;
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}
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virSecurityManagerPtr*
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virSecurityStackGetNested(virSecurityManagerPtr mgr)
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{
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virSecurityManagerPtr *list = NULL;
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item;
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int len = 0;
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size_t i;
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for (item = priv->itemsHead; item; item = item->next)
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len++;
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if (VIR_ALLOC_N(list, len + 1) < 0)
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return NULL;
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for (i = 0, item = priv->itemsHead; item; item = item->next, i++)
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list[i] = item->securityManager;
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list[len] = NULL;
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return list;
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}
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static const char *
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virSecurityStackGetBaseLabel(virSecurityManagerPtr mgr, int virtType)
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{
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return virSecurityManagerGetBaseLabel(virSecurityStackGetPrimary(mgr),
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virtType);
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}
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static int
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virSecurityStackSetSecurityImageLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virStorageSourcePtr src)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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if (virSecurityManagerSetImageLabel(item->securityManager, vm, src) < 0)
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rc = -1;
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}
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return rc;
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}
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static int
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virSecurityStackRestoreSecurityImageLabel(virSecurityManagerPtr mgr,
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virDomainDefPtr vm,
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virStorageSourcePtr src)
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{
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virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
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virSecurityStackItemPtr item = priv->itemsHead;
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int rc = 0;
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for (; item; item = item->next) {
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|
if (virSecurityManagerRestoreImageLabel(item->securityManager,
|
|
vm, src) < 0)
|
|
rc = -1;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
virSecurityDriver virSecurityDriverStack = {
|
|
.privateDataLen = sizeof(virSecurityStackData),
|
|
.name = "stack",
|
|
.probe = virSecurityStackProbe,
|
|
.open = virSecurityStackOpen,
|
|
.close = virSecurityStackClose,
|
|
|
|
.getModel = virSecurityStackGetModel,
|
|
.getDOI = virSecurityStackGetDOI,
|
|
|
|
.preFork = virSecurityStackPreFork,
|
|
|
|
.domainSecurityVerify = virSecurityStackVerify,
|
|
|
|
.domainSetSecurityDiskLabel = virSecurityStackSetSecurityDiskLabel,
|
|
.domainRestoreSecurityDiskLabel = virSecurityStackRestoreSecurityDiskLabel,
|
|
|
|
.domainSetSecurityImageLabel = virSecurityStackSetSecurityImageLabel,
|
|
.domainRestoreSecurityImageLabel = virSecurityStackRestoreSecurityImageLabel,
|
|
|
|
.domainSetSecurityDaemonSocketLabel = virSecurityStackSetDaemonSocketLabel,
|
|
.domainSetSecuritySocketLabel = virSecurityStackSetSocketLabel,
|
|
.domainClearSecuritySocketLabel = virSecurityStackClearSocketLabel,
|
|
|
|
.domainGenSecurityLabel = virSecurityStackGenLabel,
|
|
.domainReserveSecurityLabel = virSecurityStackReserveLabel,
|
|
.domainReleaseSecurityLabel = virSecurityStackReleaseLabel,
|
|
|
|
.domainGetSecurityProcessLabel = virSecurityStackGetProcessLabel,
|
|
.domainSetSecurityProcessLabel = virSecurityStackSetProcessLabel,
|
|
.domainSetSecurityChildProcessLabel = virSecurityStackSetChildProcessLabel,
|
|
|
|
.domainSetSecurityAllLabel = virSecurityStackSetSecurityAllLabel,
|
|
.domainRestoreSecurityAllLabel = virSecurityStackRestoreSecurityAllLabel,
|
|
|
|
.domainSetSecurityHostdevLabel = virSecurityStackSetSecurityHostdevLabel,
|
|
.domainRestoreSecurityHostdevLabel = virSecurityStackRestoreSecurityHostdevLabel,
|
|
|
|
.domainSetSavedStateLabel = virSecurityStackSetSavedStateLabel,
|
|
.domainRestoreSavedStateLabel = virSecurityStackRestoreSavedStateLabel,
|
|
|
|
.domainSetSecurityImageFDLabel = virSecurityStackSetImageFDLabel,
|
|
.domainSetSecurityTapFDLabel = virSecurityStackSetTapFDLabel,
|
|
|
|
.domainGetSecurityMountOptions = virSecurityStackGetMountOptions,
|
|
|
|
.domainSetSecurityHugepages = virSecurityStackSetHugepages,
|
|
|
|
.getBaseLabel = virSecurityStackGetBaseLabel,
|
|
};
|