mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-07-03 16:42:37 +00:00
implement usb and pci hot attach in AppArmor driver
Description: Implement AppArmorSetSecurityHostdevLabel() and AppArmorRestoreSecurityHostdevLabel() for hostdev and pcidev attach. virt-aa-helper also has to be adjusted because *FileIterate() is used for pci and usb devices and the corresponding XML for hot attached hostdev and pcidev is not in the XML passed to virt-aa-helper. The new '-F filename' option is added to append a rule to the profile as opposed to the existing '-f filename', which rewrites the libvirt-<uuid>.files file anew. This new '-F' option will append a rule to an existing libvirt-<uuid>.files if it exists, otherwise it acts the same as '-f'. load_profile() and reload_profile() have been adjusted to add an 'append' argument, which when true will use '-F' instead of '-f' when executing virt-aa-helper. All existing calls to load_profile() and reload_profile() have been adjusted to use the old behavior (ie append==false) except AppArmorSetSavedStateLabel() where it made sense to use the new behavior. This patch also adds tests for '-F'. Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/640993
This commit is contained in:
Jamie Strandboge
Eric Blake
parent
f095424600
commit
593e0072eb
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@ -1,7 +1,7 @@
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/*
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* AppArmor security driver for libvirt
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* Copyright (C) 2009 Canonical Ltd.
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* Copyright (C) 2009-2010 Canonical Ltd.
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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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@ -35,12 +35,20 @@
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#include "virterror_internal.h"
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#include "datatypes.h"
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#include "uuid.h"
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#include "pci.h"
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#include "hostusb.h"
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#define VIR_FROM_THIS VIR_FROM_SECURITY
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#define SECURITY_APPARMOR_VOID_DOI "0"
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#define SECURITY_APPARMOR_NAME "apparmor"
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#define VIRT_AA_HELPER BINDIR "/virt-aa-helper"
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/* Data structure to pass to *FileIterate so we have everything we need */
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struct SDPDOP {
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virSecurityDriverPtr drv;
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virDomainObjPtr vm;
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};
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/*
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* profile_status returns '-1' on error, '0' if loaded
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*
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@ -149,8 +157,10 @@ profile_status_file(const char *str)
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*/
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static int
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load_profile(virSecurityDriverPtr drv,
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const char *profile, virDomainObjPtr vm,
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const char *fn)
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const char *profile,
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virDomainObjPtr vm,
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const char *fn,
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bool append)
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{
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int rc = -1, status, ret;
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bool create = true;
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@ -178,6 +188,12 @@ load_profile(virSecurityDriverPtr drv,
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};
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ret = virExec(argv, NULL, NULL, &child,
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pipefd[0], NULL, NULL, VIR_EXEC_NONE);
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} else if (fn && append) {
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const char *const argv[] = {
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VIRT_AA_HELPER, "-p", probe, "-r", "-u", profile, "-F", fn, NULL
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};
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ret = virExec(argv, NULL, NULL, &child,
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pipefd[0], NULL, NULL, VIR_EXEC_NONE);
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} else if (fn) {
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const char *const argv[] = {
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VIRT_AA_HELPER, "-p", probe, "-r", "-u", profile, "-f", fn, NULL
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@ -285,7 +301,9 @@ cleanup:
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*/
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static int
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reload_profile(virSecurityDriverPtr drv,
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virDomainObjPtr vm, const char *fn)
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virDomainObjPtr vm,
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const char *fn,
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bool append)
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{
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const virSecurityLabelDefPtr secdef = &vm->def->seclabel;
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int rc = -1;
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@ -299,7 +317,7 @@ reload_profile(virSecurityDriverPtr drv,
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/* Update the profile only if it is loaded */
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if (profile_loaded(secdef->imagelabel) >= 0) {
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if (load_profile(drv, secdef->imagelabel, vm, fn) < 0) {
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if (load_profile(drv, secdef->imagelabel, vm, fn, append) < 0) {
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virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot update AppArmor profile "
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"\'%s\'"),
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@ -315,6 +333,42 @@ reload_profile(virSecurityDriverPtr drv,
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return rc;
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}
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static int
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AppArmorSetSecurityUSBLabel(usbDevice *dev ATTRIBUTE_UNUSED,
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const char *file, void *opaque)
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{
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struct SDPDOP *ptr = opaque;
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virDomainObjPtr vm = ptr->vm;
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if (reload_profile(ptr->drv, vm, file, true) < 0) {
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const virSecurityLabelDefPtr secdef = &vm->def->seclabel;
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virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot update AppArmor profile "
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"\'%s\'"),
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secdef->imagelabel);
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return -1;
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}
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return 0;
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}
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static int
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AppArmorSetSecurityPCILabel(pciDevice *dev ATTRIBUTE_UNUSED,
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const char *file, void *opaque)
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{
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struct SDPDOP *ptr = opaque;
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virDomainObjPtr vm = ptr->vm;
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if (reload_profile(ptr->drv, vm, file, true) < 0) {
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const virSecurityLabelDefPtr secdef = &vm->def->seclabel;
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virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot update AppArmor profile "
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"\'%s\'"),
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secdef->imagelabel);
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return -1;
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}
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return 0;
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}
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/* Called on libvirtd startup to see if AppArmor is available */
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static int
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AppArmorSecurityDriverProbe(void)
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@ -426,7 +480,8 @@ AppArmorSetSecurityAllLabel(virSecurityDriverPtr drv,
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/* if the profile is not already loaded, then load one */
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if (profile_loaded(vm->def->seclabel.label) < 0) {
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if (load_profile(drv, vm->def->seclabel.label, vm, stdin_path) < 0) {
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if (load_profile(drv, vm->def->seclabel.label, vm, stdin_path,
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false) < 0) {
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virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot generate AppArmor profile "
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"\'%s\'"), vm->def->seclabel.label);
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@ -549,7 +604,7 @@ AppArmorRestoreSecurityImageLabel(virSecurityDriverPtr drv,
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virDomainObjPtr vm,
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virDomainDiskDefPtr disk ATTRIBUTE_UNUSED)
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{
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return reload_profile(drv, vm, NULL);
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return reload_profile(drv, vm, NULL, false);
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}
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/* Called when hotplugging */
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@ -580,7 +635,8 @@ AppArmorSetSecurityImageLabel(virSecurityDriverPtr drv,
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/* update the profile only if it is loaded */
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if (profile_loaded(secdef->imagelabel) >= 0) {
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if (load_profile(drv, secdef->imagelabel, vm, disk->src) < 0) {
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if (load_profile(drv, secdef->imagelabel, vm, disk->src,
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false) < 0) {
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virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot update AppArmor profile "
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"\'%s\'"),
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@ -622,22 +678,69 @@ AppArmorReserveSecurityLabel(virSecurityDriverPtr drv ATTRIBUTE_UNUSED,
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}
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static int
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AppArmorSetSecurityHostdevLabel(virSecurityDriverPtr drv ATTRIBUTE_UNUSED,
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AppArmorSetSecurityHostdevLabel(virSecurityDriverPtr drv,
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virDomainObjPtr vm,
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virDomainHostdevDefPtr dev ATTRIBUTE_UNUSED)
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virDomainHostdevDefPtr dev)
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{
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const virSecurityLabelDefPtr secdef = &vm->def->seclabel;
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struct SDPDOP *ptr;
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int ret = -1;
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if (secdef->type == VIR_DOMAIN_SECLABEL_STATIC)
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return 0;
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/* TODO: call load_profile with an update vm->def */
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return 0;
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if (dev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
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return 0;
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if (profile_loaded(secdef->imagelabel) < 0)
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return 0;
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if (VIR_ALLOC(ptr) < 0)
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return -1;
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ptr->drv = drv;
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ptr->vm = vm;
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switch (dev->source.subsys.type) {
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case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: {
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usbDevice *usb = usbGetDevice(dev->source.subsys.u.usb.bus,
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dev->source.subsys.u.usb.device);
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if (!usb)
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goto done;
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ret = usbDeviceFileIterate(usb, AppArmorSetSecurityUSBLabel, ptr);
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usbFreeDevice(usb);
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break;
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}
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case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI: {
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pciDevice *pci = pciGetDevice(dev->source.subsys.u.pci.domain,
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dev->source.subsys.u.pci.bus,
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dev->source.subsys.u.pci.slot,
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dev->source.subsys.u.pci.function);
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if (!pci)
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goto done;
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ret = pciDeviceFileIterate(pci, AppArmorSetSecurityPCILabel, ptr);
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pciFreeDevice(pci);
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break;
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}
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default:
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ret = 0;
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break;
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}
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done:
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VIR_FREE(ptr);
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return ret;
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}
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static int
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AppArmorRestoreSecurityHostdevLabel(virSecurityDriverPtr drv ATTRIBUTE_UNUSED,
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AppArmorRestoreSecurityHostdevLabel(virSecurityDriverPtr drv,
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virDomainObjPtr vm,
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virDomainHostdevDefPtr dev ATTRIBUTE_UNUSED)
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@ -646,8 +749,7 @@ AppArmorRestoreSecurityHostdevLabel(virSecurityDriverPtr drv ATTRIBUTE_UNUSED,
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if (secdef->type == VIR_DOMAIN_SECLABEL_STATIC)
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return 0;
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/* TODO: call load_profile (needs virDomainObjPtr vm) */
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return 0;
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return reload_profile(drv, vm, NULL, false);
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}
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static int
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@ -655,7 +757,7 @@ AppArmorSetSavedStateLabel(virSecurityDriverPtr drv,
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virDomainObjPtr vm,
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const char *savefile)
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{
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return reload_profile(drv, vm, savefile);
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return reload_profile(drv, vm, savefile, true);
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}
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@ -664,7 +766,7 @@ AppArmorRestoreSavedStateLabel(virSecurityDriverPtr drv,
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virDomainObjPtr vm,
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const char *savefile ATTRIBUTE_UNUSED)
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{
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return reload_profile(drv, vm, NULL);
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return reload_profile(drv, vm, NULL, false);
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}
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virSecurityDriver virAppArmorSecurityDriver = {
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@ -1,7 +1,7 @@
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/*
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* virt-aa-helper: wrapper program used by AppArmor security driver.
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* Copyright (C) 2009 Canonical Ltd.
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* Copyright (C) 2009-2010 Canonical Ltd.
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*
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* See COPYING.LIB for the License of this software
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*
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@ -54,7 +54,8 @@ typedef struct {
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char *hvm; /* type of hypervisor (eg hvm, xen) */
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char *arch; /* machine architecture */
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int bits; /* bits in the guest */
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char *newdisk; /* newly added disk */
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char *newfile; /* newly added file */
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bool append; /* append to .files instead of rewrite */
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} vahControl;
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static int
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@ -68,7 +69,7 @@ vahDeinit(vahControl * ctl)
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VIR_FREE(ctl->files);
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VIR_FREE(ctl->hvm);
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VIR_FREE(ctl->arch);
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VIR_FREE(ctl->newdisk);
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VIR_FREE(ctl->newfile);
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return 0;
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}
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@ -84,6 +85,8 @@ vah_usage(void)
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" -a | --add load profile\n"
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" -c | --create create profile from template\n"
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" -D | --delete unload and delete profile\n"
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" -f | --add-file <file> add file to profile\n"
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" -F | --append-file <file> append file to profile\n"
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" -r | --replace reload profile\n"
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" -R | --remove unload profile\n"
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" -h | --help this help\n"
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@ -227,18 +230,33 @@ parserCommand(const char *profile_name, const char cmd)
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* Update the dynamic files
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*/
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static int
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update_include_file(const char *include_file, const char *included_files)
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update_include_file(const char *include_file, const char *included_files,
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bool append)
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{
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int rc = -1;
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int plen;
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int plen, flen;
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int fd;
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char *pcontent = NULL;
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char *existing = NULL;
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const char *warning =
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"# DO NOT EDIT THIS FILE DIRECTLY. IT IS MANAGED BY LIBVIRT.\n";
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if (virAsprintf(&pcontent, "%s%s", warning, included_files) == -1) {
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vah_error(NULL, 0, "could not allocate memory for profile");
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return rc;
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if (virFileExists(include_file)) {
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flen = virFileReadAll(include_file, MAX_FILE_LEN, &existing);
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if (flen < 0)
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return rc;
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}
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if (append && virFileExists(include_file)) {
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if (virAsprintf(&pcontent, "%s%s", existing, included_files) == -1) {
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vah_error(NULL, 0, "could not allocate memory for profile");
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goto clean;
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}
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} else {
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if (virAsprintf(&pcontent, "%s%s", warning, included_files) == -1) {
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vah_error(NULL, 0, "could not allocate memory for profile");
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goto clean;
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}
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}
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plen = strlen(pcontent);
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@ -248,20 +266,9 @@ update_include_file(const char *include_file, const char *included_files)
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}
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/* only update the disk profile if it is different */
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if (virFileExists(include_file)) {
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char *existing = NULL;
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int flen = virFileReadAll(include_file, MAX_FILE_LEN, &existing);
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if (flen < 0)
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goto clean;
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if (flen == plen) {
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if (STREQLEN(existing, pcontent, plen)) {
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rc = 0;
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VIR_FREE(existing);
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goto clean;
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}
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}
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VIR_FREE(existing);
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if (flen > 0 && flen == plen && STREQLEN(existing, pcontent, plen)) {
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rc = 0;
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goto clean;
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}
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/* write the file */
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|
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@ -284,6 +291,7 @@ update_include_file(const char *include_file, const char *included_files)
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clean:
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VIR_FREE(pcontent);
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VIR_FREE(existing);
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return rc;
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}
|
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|
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@ -958,8 +966,8 @@ get_files(vahControl * ctl)
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} /* switch */
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}
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if (ctl->newdisk)
|
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if (vah_add_file(&buf, ctl->newdisk, "rw") != 0)
|
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if (ctl->newfile)
|
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if (vah_add_file(&buf, ctl->newfile, "rw") != 0)
|
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goto clean;
|
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|
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if (virBufferError(&buf)) {
|
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|
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@ -987,6 +995,7 @@ vahParseArgv(vahControl * ctl, int argc, char **argv)
|
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{"dryrun", 0, 0, 'd'},
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{"delete", 0, 0, 'D'},
|
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{"add-file", 0, 0, 'f'},
|
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{"append-file", 0, 0, 'F'},
|
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{"help", 0, 0, 'h'},
|
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{"replace", 0, 0, 'r'},
|
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{"remove", 0, 0, 'R'},
|
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|
|
@ -994,7 +1003,7 @@ vahParseArgv(vahControl * ctl, int argc, char **argv)
|
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{0, 0, 0, 0}
|
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};
|
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|
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while ((arg = getopt_long(argc, argv, "acdDhrRH:b:u:p:f:", opt,
|
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while ((arg = getopt_long(argc, argv, "acdDhrRH:b:u:p:f:F:", opt,
|
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&idx)) != -1) {
|
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switch (arg) {
|
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case 'a':
|
||||
|
|
@ -1010,8 +1019,10 @@ vahParseArgv(vahControl * ctl, int argc, char **argv)
|
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ctl->cmd = 'D';
|
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break;
|
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case 'f':
|
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if ((ctl->newdisk = strdup(optarg)) == NULL)
|
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case 'F':
|
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if ((ctl->newfile = strdup(optarg)) == NULL)
|
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vah_error(ctl, 1, "could not allocate memory for disk");
|
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ctl->append = arg == 'F';
|
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break;
|
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case 'h':
|
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vah_usage();
|
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|
|
@ -1127,14 +1138,19 @@ main(int argc, char **argv)
|
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if (ctl->cmd == 'c' && virFileExists(profile))
|
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vah_error(ctl, 1, "profile exists");
|
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|
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virBufferVSprintf(&buf, " \"%s/log/libvirt/**/%s.log\" w,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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virBufferVSprintf(&buf, " \"%s/lib/libvirt/**/%s.monitor\" rw,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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virBufferVSprintf(&buf, " \"%s/run/libvirt/**/%s.pid\" rwk,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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if (ctl->files)
|
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virBufferVSprintf(&buf, "%s", ctl->files);
|
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if (ctl->append && ctl->newfile) {
|
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if (vah_add_file(&buf, ctl->newfile, "rw") != 0)
|
||||
goto clean;
|
||||
} else {
|
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virBufferVSprintf(&buf, " \"%s/log/libvirt/**/%s.log\" w,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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virBufferVSprintf(&buf, " \"%s/lib/libvirt/**/%s.monitor\" rw,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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virBufferVSprintf(&buf, " \"%s/run/libvirt/**/%s.pid\" rwk,\n",
|
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LOCAL_STATE_DIR, ctl->def->name);
|
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if (ctl->files)
|
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virBufferVSprintf(&buf, "%s", ctl->files);
|
||||
}
|
||||
|
||||
if (virBufferError(&buf)) {
|
||||
virBufferFreeAndReset(&buf);
|
||||
|
|
@ -1149,7 +1165,8 @@ main(int argc, char **argv)
|
|||
vah_info(included_files);
|
||||
rc = 0;
|
||||
} else if ((rc = update_include_file(include_file,
|
||||
included_files)) != 0)
|
||||
included_files,
|
||||
ctl->append)) != 0)
|
||||
goto clean;
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -179,6 +179,8 @@ else
|
|||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,/boot/initrd,g" > "$test_xml"
|
||||
testme "1" "-r with invalid -f with probing" "-p 1 -r -u $valid_uuid -f $bad_disk" "$test_xml"
|
||||
testme "1" "-r with invalid -f without probing" "-p 0 -r -u $valid_uuid -f $bad_disk" "$test_xml"
|
||||
testme "1" "-r with invalid -F with probing" "-p 1 -r -u $valid_uuid -F $bad_disk" "$test_xml"
|
||||
testme "1" "-r with invalid -F without probing" "-p 0 -r -u $valid_uuid -F $bad_disk" "$test_xml"
|
||||
fi
|
||||
|
||||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,$disk1</disk>,g" > "$test_xml"
|
||||
|
|
@ -237,6 +239,12 @@ testme "0" "replace (adding disk)" "-r -u $valid_uuid -f $disk2" "$test_xml"
|
|||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,$disk1,g" > "$test_xml"
|
||||
testme "0" "replace (adding non-existent disk)" "-r -u $valid_uuid -f $nonexistent" "$test_xml"
|
||||
|
||||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,$disk1,g" > "$test_xml"
|
||||
testme "0" "replace (appending disk)" "-r -u $valid_uuid -F $disk2" "$test_xml"
|
||||
|
||||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,$disk1,g" > "$test_xml"
|
||||
testme "0" "replace (appending non-existent disk)" "-r -u $valid_uuid -F $nonexistent" "$test_xml"
|
||||
|
||||
cat "$template_xml" | sed "s,###UUID###,$uuid,g" | sed "s,###DISK###,$disk1,g" | sed "s,</devices>,<disk type='block' device='cdrom'><target dev='hdc' bus='ide'/><readonly/></disk></devices>,g" > "$test_xml"
|
||||
testme "0" "disk (empty cdrom)" "-r -u $valid_uuid" "$test_xml"
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user