This patch updates the key "security_driver" in QEMU config to suport
both a sigle default driver or a list of default drivers. This ensures
that it will remain compatible with older versions of the config file.
Signed-off-by: Marcelo Cerri <mhcerri@xxxxxxxxxxxxxxxxxx>
---
src/qemu/qemu.conf | 6 ++-
src/qemu/qemu_conf.c | 38 +++++++++++++++++-
src/qemu/qemu_conf.h | 2 +-
src/qemu/qemu_driver.c | 99 +++++++++++++++++++++++++++++++++++++-----------
4 files changed, 118 insertions(+), 27 deletions(-)
diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf
index ed4683c..257a477 100644
--- a/src/qemu/qemu.conf
+++ b/src/qemu/qemu.conf
@@ -144,7 +144,11 @@
# on the host, then the security driver will automatically disable
# itself. If you wish to disable QEMU SELinux security driver while
# leaving SELinux enabled for the host in general, then set this
-# to 'none' instead.
+# to 'none' instead. It's also possible to use more than one security
+# driver at the same time, for this use a list of names separated by
+# comma and delimited by square brackets. For example:
+#
+# security_driver = [ "selinux", "dac" ]
#
#security_driver = "selinux"
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index b7db277..ed6d832 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -193,13 +193,45 @@ int qemudLoadDriverConfig(struct qemud_driver *driver,
}
p = virConfGetValue (conf, "security_driver");
- CHECK_TYPE ("security_driver", VIR_CONF_STRING);
- if (p && p->str) {
- if (!(driver->securityDriverName = strdup(p->str))) {
+ if (p && p->type == VIR_CONF_LIST) {
+ size_t len;
+ virConfValuePtr pp;
+
+ /* Calc lenght and check items */
+ for (len = 0, pp = p->list; pp; len++, pp = pp->next) {
+ if (pp->type != VIR_CONF_STRING) {
+ VIR_ERROR(_("security_driver be a list of strings"));
+ virConfFree(conf);
+ return -1;
+ }
+ }
+
+ if (VIR_ALLOC_N(driver->securityDriverNames, len + 1) < 0) {
virReportOOMError();
virConfFree(conf);
return -1;
}
+
+ for (i = 0, pp = p->list; pp; i++, pp = pp->next) {
+ driver->securityDriverNames[i] = strdup(pp->str);
+ if (driver->securityDriverNames == NULL) {
+ virReportOOMError();
+ virConfFree(conf);
+ return -1;
+ }
+ }
+ driver->securityDriverNames[len] = NULL;
+ } else {
+ CHECK_TYPE ("security_driver", VIR_CONF_STRING);
+ if (p && p->str) {
+ if (VIR_ALLOC_N(driver->securityDriverNames, 2) < 0 ||
+ !(driver->securityDriverNames[0] = strdup(p->str))) {
+ virReportOOMError();
+ virConfFree(conf);
+ return -1;
+ }
+ driver->securityDriverNames[1] = NULL;
+ }
}
p = virConfGetValue (conf, "security_default_confined");
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index 92e4968..8a51471 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -116,7 +116,7 @@ struct qemud_driver {
virDomainEventStatePtr domainEventState;
- char *securityDriverName;
+ char **securityDriverNames;
bool securityDefaultConfined;
bool securityRequireConfined;
virSecurityManagerPtr securityManager;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 48376c3..0c88310 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -248,36 +248,91 @@ qemuAutostartDomains(struct qemud_driver *driver)
static int
qemuSecurityInit(struct qemud_driver *driver)
{
- virSecurityManagerPtr mgr = virSecurityManagerNew(driver->securityDriverName,
- QEMU_DRIVER_NAME,
- driver->allowDiskFormatProbing,
- driver->securityDefaultConfined,
- driver->securityRequireConfined);
+ char **names;
+ char *primary;
+ virSecurityManagerPtr mgr, nested, stack;
+ if (driver->securityDriverNames == NULL)
+ primary = NULL;
+ else
+ primary = driver->securityDriverNames[0];
+
+ /* Create primary driver */
+ mgr = virSecurityManagerNew(primary,
+ QEMU_DRIVER_NAME,
+ driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined);
if (!mgr)
goto error;
+ /* If a DAC driver is required or additional drivers are provived, a stack
+ * driver should be create to group them all */
+ if (driver->privileged ||
+ (driver->securityDriverNames && driver->securityDriverNames[1])) {
+ stack = virSecurityManagerNewStack(mgr);
+ if (!stack)
+ goto error;
+ mgr = stack;
+ }
+
+ /* Loop through additional driver names and add a secudary driver to each
+ * one */
+ if (driver->securityDriverNames) {
+ names = driver->securityDriverNames + 1;
+ while (names && *names) {
+ if (STREQ("dac", *names)) {
+ /* A DAC driver has specific parameters */
+ nested = virSecurityManagerNewDAC(QEMU_DRIVER_NAME,
+ driver->user,
+ driver->group,
+ driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined,
+ driver->dynamicOwnership);
+ } else {
+ nested = virSecurityManagerNew(*names,
+ QEMU_DRIVER_NAME,
+ driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined);
+ }
+ if (nested == NULL)
+ goto error;
+ if (virSecurityManagerStackAddNested(stack, nested))
+ goto error;
+ names++;
+ }
+ }
+
if (driver->privileged) {
- virSecurityManagerPtr dac = virSecurityManagerNewDAC(QEMU_DRIVER_NAME,
- driver->user,
- driver->group,
- driver->allowDiskFormatProbing,
- driver->securityDefaultConfined,
- driver->securityRequireConfined,
- driver->dynamicOwnership);
- if (!dac)
- goto error;
-
- if (!(driver->securityManager = virSecurityManagerNewStack(mgr)) ||
- !(virSecurityManagerStackAddNested(mgr, dac))) {
-
- virSecurityManagerFree(dac);
- goto error;
+ /* When a DAC driver is required, check if there is already one in the
+ * additional drivers */
+ names = driver->securityDriverNames;
+ while (names && *names) {
+ if (STREQ("dac", *names)) {
+ break;
+ }
+ names++;
+ }
+ /* If there is no DAC driver, create a new one and add it to the stack
+ * manager */
+ if (names == NULL || *names == NULL) {
+ nested = virSecurityManagerNewDAC(QEMU_DRIVER_NAME,
+ driver->user,
+ driver->group,
+ driver->allowDiskFormatProbing,
+ driver->securityDefaultConfined,
+ driver->securityRequireConfined,
+ driver->dynamicOwnership);
+ if (nested == NULL)
+ goto error;
+ if (virSecurityManagerStackAddNested(stack, nested))
+ goto error;
}
- } else {
- driver->securityManager = mgr;
}
+ driver->securityManager = mgr;
return 0;
error:
--
1.7.1
--
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