The seclabel element allows control over the
- operation of the security drivers. There are two basic
- modes of operation, dynamic where libvirt automatically
- generates a unique security label, or static where the
- application/administrator chooses the labels. With dynamic
+ operation of the security drivers. There are three basic
+ modes of operation, 'dynamic' where libvirt automatically
+ generates a unique security label, 'static' where the
+ application/administrator chooses the labels, or 'none'
+ where confinement is disabled. With dynamic
label generation, libvirt will always automatically
relabel any resources associated with the virtual machine.
With static label assignment, by default, the administrator
or application must ensure labels are set correctly on any
resources, however, automatic relabeling can be enabled
- if desired.
+ if desired. 'dynamic' since 0.6.1, 'static'
+ since 0.6.2, and 'none' since 0.9.10.
+ If no 'type' attribute is provided in the input XML, then
+ the security driver default setting will be used, which
+ may be either 'none' or 'dynamic'. If a 'baselabel' is set
+ but no 'type' is set, then the type is presumed to be 'dynamic'
+
+
When viewing the XML for a running guest with automatic
resource relabeling active, an additional XML element,
@@ -3581,9 +3592,9 @@ qemu-kvm -net nic,model=? /dev/null
type
-
Either static or dynamic to determine
- whether libvirt automatically generates a unique security label
- or not.
+
Either static, dynamic or none
+ to determine whether libvirt automatically generates a unique security
+ label or not.
model
A valid security model name, matching the currently
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 1576233706..8111045c03 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -129,6 +129,11 @@
+
+
+ none
+
+
diff --git a/po/POTFILES.in b/po/POTFILES.in
index ba93334e09..cbe62dd070 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -90,6 +90,7 @@ src/secret/secret_driver.c
src/security/security_apparmor.c
src/security/security_dac.c
src/security/security_driver.c
+src/security/security_manager.c
src/security/security_selinux.c
src/security/virt-aa-helper.c
src/storage/parthelper.c
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index aba81c305e..aeef9db46c 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -564,6 +564,8 @@ VIR_ENUM_IMPL(virDomainCrashedReason, VIR_DOMAIN_CRASHED_LAST,
"unknown")
VIR_ENUM_IMPL(virDomainSeclabel, VIR_DOMAIN_SECLABEL_LAST,
+ "default",
+ "none",
"dynamic",
"static")
@@ -2585,13 +2587,15 @@ virSecurityLabelDefParseXML(virSecurityLabelDefPtr def,
"%s", _("missing security type"));
goto error;
}
+
def->type = virDomainSeclabelTypeFromString(p);
VIR_FREE(p);
- if (def->type < 0) {
+ if (def->type <= 0) {
virDomainReportError(VIR_ERR_XML_ERROR,
"%s", _("invalid security type"));
goto error;
}
+
p = virXPathStringLimit("string(./seclabel/@relabel)",
VIR_SECURITY_LABEL_BUFLEN-1, ctxt);
if (p != NULL) {
@@ -2612,8 +2616,15 @@ virSecurityLabelDefParseXML(virSecurityLabelDefPtr def,
"%s", _("dynamic label type must use resource relabeling"));
goto error;
}
+ if (def->type == VIR_DOMAIN_SECLABEL_NONE &&
+ !def->norelabel) {
+ virDomainReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("resource relabeling is not compatible with 'none' label type"));
+ goto error;
+ }
} else {
- if (def->type == VIR_DOMAIN_SECLABEL_STATIC)
+ if (def->type == VIR_DOMAIN_SECLABEL_STATIC ||
+ def->type == VIR_DOMAIN_SECLABEL_NONE)
def->norelabel = true;
else
def->norelabel = false;
@@ -2648,12 +2659,16 @@ virSecurityLabelDefParseXML(virSecurityLabelDefPtr def,
def->imagelabel = p;
}
- /* Only parse baselabel, for dynamic label */
- if (def->type == VIR_DOMAIN_SECLABEL_DYNAMIC) {
+ /* Only parse baselabel, for dynamic or none label types */
+ if (def->type == VIR_DOMAIN_SECLABEL_DYNAMIC ||
+ def->type == VIR_DOMAIN_SECLABEL_NONE) {
p = virXPathStringLimit("string(./seclabel/baselabel[1])",
VIR_SECURITY_LABEL_BUFLEN-1, ctxt);
- if (p != NULL)
+ if (p != NULL) {
def->baselabel = p;
+ /* Forces none type to dynamic for back compat */
+ def->type = VIR_DOMAIN_SECLABEL_DYNAMIC;
+ }
}
/* Only parse model, if static labelling, or a base
@@ -9923,24 +9938,32 @@ virDomainLifecycleDefFormat(virBufferPtr buf,
}
-static int
-virSecurityLabelDefFormat(virBufferPtr buf, virSecurityLabelDefPtr def,
- unsigned int flags)
+static void
+virSecurityLabelDefFormat(virBufferPtr buf, virSecurityLabelDefPtr def)
{
const char *sectype = virDomainSeclabelTypeToString(def->type);
- int ret = -1;
if (!sectype)
- goto cleanup;
+ return;
+
+ if (def->type == VIR_DOMAIN_SECLABEL_DEFAULT)
+ return;
+
+ virBufferAsprintf(buf, "model);
+
+ virBufferAsprintf(buf, " relabel='%s'",
+ def->norelabel ? "no" : "yes");
+
+ if (def->type == VIR_DOMAIN_SECLABEL_NONE) {
+ virBufferAddLit(buf, "/>\n");
+ return;
+ }
+
+ if (def->label || def->imagelabel || def->baselabel) {
+ virBufferAddLit(buf, ">\n");
- if (def->type == VIR_DOMAIN_SECLABEL_DYNAMIC &&
- !def->baselabel &&
- (flags & VIR_DOMAIN_XML_INACTIVE)) {
- /* This is the default for inactive xml, so nothing to output. */
- } else {
- virBufferAsprintf(buf, "\n",
- sectype, def->model,
- def->norelabel ? "no" : "yes");
virBufferEscapeString(buf, " \n",
def->label);
if (!def->norelabel)
@@ -9950,10 +9973,9 @@ virSecurityLabelDefFormat(virBufferPtr buf, virSecurityLabelDefPtr def,
virBufferEscapeString(buf, " %s\n",
def->baselabel);
virBufferAddLit(buf, "\n");
+ } else {
+ virBufferAddLit(buf, "/>\n");
}
- ret = 0;
-cleanup:
- return ret;
}
@@ -11957,12 +11979,9 @@ virDomainDefFormatInternal(virDomainDefPtr def,
virBufferAddLit(buf, " \n");
- if (def->seclabel.model) {
- virBufferAdjustIndent(buf, 2);
- if (virSecurityLabelDefFormat(buf, &def->seclabel, flags) < 0)
- goto cleanup;
- virBufferAdjustIndent(buf, -2);
- }
+ virBufferAdjustIndent(buf, 2);
+ virSecurityLabelDefFormat(buf, &def->seclabel);
+ virBufferAdjustIndent(buf, -2);
if (def->namespaceData && def->ns.format) {
if ((def->ns.format)(buf, def->namespaceData) < 0)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index a604155319..e3c9af8613 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -175,6 +175,8 @@ struct _virDomainDeviceInfo {
};
enum virDomainSeclabelType {
+ VIR_DOMAIN_SECLABEL_DEFAULT,
+ VIR_DOMAIN_SECLABEL_NONE,
VIR_DOMAIN_SECLABEL_DYNAMIC,
VIR_DOMAIN_SECLABEL_STATIC,
diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug
index 078e9c41a7..f6cec1fcfd 100644
--- a/src/qemu/libvirtd_qemu.aug
+++ b/src/qemu/libvirtd_qemu.aug
@@ -33,6 +33,8 @@ module Libvirtd_qemu =
| bool_entry "vnc_sasl"
| str_entry "vnc_sasl_dir"
| str_entry "security_driver"
+ | bool_entry "security_default_confined"
+ | bool_entry "security_require_confined"
| str_entry "user"
| str_entry "group"
| bool_entry "dynamic_ownership"
diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf
index 4ec5e6c0ff..95428c1968 100644
--- a/src/qemu/qemu.conf
+++ b/src/qemu/qemu.conf
@@ -138,6 +138,14 @@
#
# security_driver = "selinux"
+# If set to non-zero, then the default security labeling
+# will make guests confined. If set to zero, then guests
+# will be unconfined by default. Defaults to 1.
+# security_default_confined = 1
+
+# If set to non-zero, then attempts to create unconfined
+# guests will be blocked. Defaults to 0.
+# security_require_confined = 1
# The user ID for QEMU processes run by the system instance.
#user = "root"
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index bc0a646b6c..e95c7a55e0 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -75,6 +75,8 @@ int qemudLoadDriverConfig(struct qemud_driver *driver,
int i;
/* Setup critical defaults */
+ driver->securityDefaultConfined = true;
+ driver->securityRequireConfined = false;
driver->dynamicOwnership = 1;
driver->clearEmulatorCapabilities = 1;
@@ -195,6 +197,15 @@ int qemudLoadDriverConfig(struct qemud_driver *driver,
}
}
+ p = virConfGetValue (conf, "security_default_confined");
+ CHECK_TYPE ("security_default_confined", VIR_CONF_LONG);
+ if (p) driver->securityDefaultConfined = p->l;
+
+ p = virConfGetValue (conf, "security_require_confined");
+ CHECK_TYPE ("security_require_confined", VIR_CONF_LONG);
+ if (p) driver->securityRequireConfined = p->l;
+
+
p = virConfGetValue (conf, "vnc_sasl");
CHECK_TYPE ("vnc_sasl", VIR_CONF_LONG);
if (p) driver->vncSASL = p->l;
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 0b65d7df97..36f1c4c4b6 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -115,6 +115,8 @@ struct qemud_driver {
virDomainEventStatePtr domainEventState;
char *securityDriverName;
+ bool securityDefaultConfined;
+ bool securityRequireConfined;
virSecurityManagerPtr securityManager;
char *saveImageFormat;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d66140b83d..1e5069a49b 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -210,7 +210,10 @@ static int
qemuSecurityInit(struct qemud_driver *driver)
{
virSecurityManagerPtr mgr = virSecurityManagerNew(driver->securityDriverName,
- driver->allowDiskFormatProbing);
+ driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined);
+
if (!mgr)
goto error;
@@ -218,6 +221,8 @@ qemuSecurityInit(struct qemud_driver *driver)
virSecurityManagerPtr dac = virSecurityManagerNewDAC(driver->user,
driver->group,
driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined,
driver->dynamicOwnership);
if (!dac)
goto error;
diff --git a/src/security/security_manager.c b/src/security/security_manager.c
index 2e4956a0ee..d0bafae062 100644
--- a/src/security/security_manager.c
+++ b/src/security/security_manager.c
@@ -36,10 +36,14 @@
struct _virSecurityManager {
virSecurityDriverPtr drv;
bool allowDiskFormatProbing;
+ bool defaultConfined;
+ bool requireConfined;
};
static virSecurityManagerPtr virSecurityManagerNewDriver(virSecurityDriverPtr drv,
- bool allowDiskFormatProbing)
+ bool allowDiskFormatProbing,
+ bool defaultConfined,
+ bool requireConfined)
{
virSecurityManagerPtr mgr;
@@ -50,6 +54,8 @@ static virSecurityManagerPtr virSecurityManagerNewDriver(virSecurityDriverPtr dr
mgr->drv = drv;
mgr->allowDiskFormatProbing = allowDiskFormatProbing;
+ mgr->defaultConfined = defaultConfined;
+ mgr->requireConfined = requireConfined;
if (drv->open(mgr) < 0) {
virSecurityManagerFree(mgr);
@@ -64,7 +70,9 @@ virSecurityManagerPtr virSecurityManagerNewStack(virSecurityManagerPtr primary,
{
virSecurityManagerPtr mgr =
virSecurityManagerNewDriver(&virSecurityDriverStack,
- virSecurityManagerGetAllowDiskFormatProbing(primary));
+ virSecurityManagerGetAllowDiskFormatProbing(primary),
+ virSecurityManagerGetDefaultConfined(primary),
+ virSecurityManagerGetRequireConfined(primary));
if (!mgr)
return NULL;
@@ -78,11 +86,15 @@ virSecurityManagerPtr virSecurityManagerNewStack(virSecurityManagerPtr primary,
virSecurityManagerPtr virSecurityManagerNewDAC(uid_t user,
gid_t group,
bool allowDiskFormatProbing,
+ bool defaultConfined,
+ bool requireConfined,
bool dynamicOwnership)
{
virSecurityManagerPtr mgr =
virSecurityManagerNewDriver(&virSecurityDriverDAC,
- allowDiskFormatProbing);
+ allowDiskFormatProbing,
+ defaultConfined,
+ requireConfined);
if (!mgr)
return NULL;
@@ -95,13 +107,18 @@ virSecurityManagerPtr virSecurityManagerNewDAC(uid_t user,
}
virSecurityManagerPtr virSecurityManagerNew(const char *name,
- bool allowDiskFormatProbing)
+ bool allowDiskFormatProbing,
+ bool defaultConfined,
+ bool requireConfined)
{
virSecurityDriverPtr drv = virSecurityDriverLookup(name);
if (!drv)
return NULL;
- return virSecurityManagerNewDriver(drv, allowDiskFormatProbing);
+ return virSecurityManagerNewDriver(drv,
+ allowDiskFormatProbing,
+ defaultConfined,
+ requireConfined);
}
@@ -149,6 +166,16 @@ bool virSecurityManagerGetAllowDiskFormatProbing(virSecurityManagerPtr mgr)
return mgr->allowDiskFormatProbing;
}
+bool virSecurityManagerGetDefaultConfined(virSecurityManagerPtr mgr)
+{
+ return mgr->defaultConfined;
+}
+
+bool virSecurityManagerGetRequireConfined(virSecurityManagerPtr mgr)
+{
+ return mgr->requireConfined;
+}
+
int virSecurityManagerRestoreImageLabel(virSecurityManagerPtr mgr,
virDomainDefPtr vm,
virDomainDiskDefPtr disk)
@@ -248,6 +275,20 @@ int virSecurityManagerRestoreSavedStateLabel(virSecurityManagerPtr mgr,
int virSecurityManagerGenLabel(virSecurityManagerPtr mgr,
virDomainDefPtr vm)
{
+ if (vm->seclabel.type == VIR_DOMAIN_SECLABEL_DEFAULT) {
+ if (mgr->defaultConfined)
+ vm->seclabel.type = VIR_DOMAIN_SECLABEL_DYNAMIC;
+ else
+ vm->seclabel.type = VIR_DOMAIN_SECLABEL_NONE;
+ }
+
+ if ((vm->seclabel.type == VIR_DOMAIN_SECLABEL_NONE) &&
+ mgr->requireConfined) {
+ virSecurityReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Unconfined guests are not allowed on this host"));
+ return -1;
+ }
+
if (mgr->drv->domainGenSecurityLabel)
return mgr->drv->domainGenSecurityLabel(mgr, vm);
diff --git a/src/security/security_manager.h b/src/security/security_manager.h
index 6731d59690..32c8c3bf41 100644
--- a/src/security/security_manager.h
+++ b/src/security/security_manager.h
@@ -32,7 +32,9 @@ typedef struct _virSecurityManager virSecurityManager;
typedef virSecurityManager *virSecurityManagerPtr;
virSecurityManagerPtr virSecurityManagerNew(const char *name,
- bool allowDiskFormatProbing);
+ bool allowDiskFormatProbing,
+ bool defaultConfined,
+ bool requireConfined);
virSecurityManagerPtr virSecurityManagerNewStack(virSecurityManagerPtr primary,
virSecurityManagerPtr secondary);
@@ -40,6 +42,8 @@ virSecurityManagerPtr virSecurityManagerNewStack(virSecurityManagerPtr primary,
virSecurityManagerPtr virSecurityManagerNewDAC(uid_t user,
gid_t group,
bool allowDiskFormatProbing,
+ bool defaultConfined,
+ bool requireConfined,
bool dynamicOwnership);
void *virSecurityManagerGetPrivateData(virSecurityManagerPtr mgr);
@@ -49,6 +53,8 @@ void virSecurityManagerFree(virSecurityManagerPtr mgr);
const char *virSecurityManagerGetDOI(virSecurityManagerPtr mgr);
const char *virSecurityManagerGetModel(virSecurityManagerPtr mgr);
bool virSecurityManagerGetAllowDiskFormatProbing(virSecurityManagerPtr mgr);
+bool virSecurityManagerGetDefaultConfined(virSecurityManagerPtr mgr);
+bool virSecurityManagerGetRequireConfined(virSecurityManagerPtr mgr);
int virSecurityManagerRestoreImageLabel(virSecurityManagerPtr mgr,
virDomainDefPtr def,
diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index cb41a17c52..15b80c4d71 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -171,6 +171,7 @@ SELinuxGenSecurityLabel(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
int c1 = 0;
int c2 = 0;
context_t ctx = NULL;
+ const char *range;
if ((def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC) &&
!def->seclabel.baselabel &&
@@ -201,7 +202,8 @@ SELinuxGenSecurityLabel(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
return rc;
}
- if (def->seclabel.type == VIR_DOMAIN_SECLABEL_STATIC) {
+ switch (def->seclabel.type) {
+ case VIR_DOMAIN_SECLABEL_STATIC:
if (!(ctx = context_new(def->seclabel.label)) ) {
virReportSystemError(errno,
_("unable to allocate socket security context '%s'"),
@@ -209,13 +211,15 @@ SELinuxGenSecurityLabel(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
return rc;
}
- const char *range = context_range_get(ctx);
+ range = context_range_get(ctx);
if (!range ||
!(mcs = strdup(range))) {
virReportOOMError();
goto cleanup;
}
- } else {
+ break;
+
+ case VIR_DOMAIN_SECLABEL_DYNAMIC:
do {
c1 = virRandomBits(10);
c2 = virRandomBits(10);
@@ -247,14 +251,28 @@ SELinuxGenSecurityLabel(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
_("cannot generate selinux context for %s"), mcs);
goto cleanup;
}
- }
- def->seclabel.imagelabel = SELinuxGenNewContext(default_image_context, mcs);
- if (!def->seclabel.imagelabel) {
+ break;
+
+ case VIR_DOMAIN_SECLABEL_NONE:
+ /* no op */
+ break;
+
+ default:
virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
- _("cannot generate selinux context for %s"), mcs);
+ _("unexpected security label type '%s'"),
+ virDomainSeclabelTypeToString(def->seclabel.type));
goto cleanup;
}
+ if (!def->seclabel.norelabel) {
+ def->seclabel.imagelabel = SELinuxGenNewContext(default_image_context, mcs);
+ if (!def->seclabel.imagelabel) {
+ virSecurityReportError(VIR_ERR_INTERNAL_ERROR,
+ _("cannot generate selinux context for %s"), mcs);
+ goto cleanup;
+ }
+ }
+
if (!def->seclabel.model &&
!(def->seclabel.model = strdup(SECURITY_SELINUX_NAME))) {
virReportOOMError();
diff --git a/tests/seclabeltest.c b/tests/seclabeltest.c
index 5d877890af..1898c3e91d 100644
--- a/tests/seclabeltest.c
+++ b/tests/seclabeltest.c
@@ -13,7 +13,7 @@ main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
virSecurityManagerPtr mgr;
const char *doi, *model;
- mgr = virSecurityManagerNew(NULL, false);
+ mgr = virSecurityManagerNew(NULL, false, true, true);
if (mgr == NULL) {
fprintf (stderr, "Failed to start security driver");
exit (-1);