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qemuDomainBuildNamespace: Populate RNGs from daemon's namespace

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As mentioned in one of previous commits, populating domain's
namespace from pre-exec() hook is dangerous. This commit moves
population of the namespace with domain RNGs into daemon's
namespace.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2020-07-21 14:37:22 +02:00
parent c872905242
commit 408f64df9f
1 changed files with 11 additions and 29 deletions
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40
src/qemu/qemu_namespace.c
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@ -762,11 +762,11 @@ qemuDomainSetupAllInputs(virDomainObjPtr vm,
static int
qemuDomainSetupRNG(virDomainRNGDefPtr rng,
const struct qemuDomainCreateDeviceData *data)
char ***paths)
{
switch ((virDomainRNGBackend) rng->backend) {
case VIR_DOMAIN_RNG_BACKEND_RANDOM:
if (qemuDomainCreateDevice(rng->source.file, data, false) < 0)
if (virStringListAdd(paths, rng->source.file) < 0)
return -1;
break;
@ -783,14 +783,14 @@ qemuDomainSetupRNG(virDomainRNGDefPtr rng,
static int
qemuDomainSetupAllRNGs(virDomainObjPtr vm,
const struct qemuDomainCreateDeviceData *data)
char ***paths)
{
size_t i;
VIR_DEBUG("Setting up RNGs");
for (i = 0; i < vm->def->nrngs; i++) {
if (qemuDomainSetupRNG(vm->def->rngs[i],
data) < 0)
paths) < 0)
return -1;
}
@ -888,6 +888,9 @@ qemuDomainBuildNamespace(virQEMUDriverConfigPtr cfg,
if (qemuDomainSetupAllInputs(vm, &paths) < 0)
return -1;
if (qemuDomainSetupAllRNGs(vm, &paths) < 0)
return -1;
if (qemuNamespaceMknodPaths(vm, (const char **) paths) < 0)
return -1;
@ -939,9 +942,6 @@ qemuDomainUnshareNamespace(virQEMUDriverConfigPtr cfg,
if (qemuDomainSetupDev(mgr, vm, devPath) < 0)
goto cleanup;
if (qemuDomainSetupAllRNGs(vm, &data) < 0)
goto cleanup;
if (qemuDomainSetupLoader(vm, &data) < 0)
goto cleanup;
@ -1580,16 +1580,6 @@ qemuDomainDetachDeviceUnlink(virQEMUDriverPtr driver G_GNUC_UNUSED,
}
static int
qemuDomainNamespaceMknodPath(virDomainObjPtr vm,
const char *path)
{
const char *paths[] = { path, NULL };
return qemuNamespaceMknodPaths(vm, paths);
}
static int
qemuDomainNamespaceUnlinkPaths(virDomainObjPtr vm,
const char **paths,
@ -1817,23 +1807,15 @@ int
qemuDomainNamespaceSetupRNG(virDomainObjPtr vm,
virDomainRNGDefPtr rng)
{
const char *path = NULL;
VIR_AUTOSTRINGLIST paths = NULL;
if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
return 0;
switch ((virDomainRNGBackend) rng->backend) {
case VIR_DOMAIN_RNG_BACKEND_RANDOM:
path = rng->source.file;
break;
if (qemuDomainSetupRNG(rng, &paths) < 0)
return -1;
case VIR_DOMAIN_RNG_BACKEND_EGD:
case VIR_DOMAIN_RNG_BACKEND_BUILTIN:
case VIR_DOMAIN_RNG_BACKEND_LAST:
break;
}
if (path && qemuDomainNamespaceMknodPath(vm, path) < 0)
if (qemuNamespaceMknodPaths(vm, (const char **) paths) < 0)
return -1;
return 0;