[libvirt] [PATCH v2 4/5] qemu: Process the hostdev "rawio" setting

[John Ferlan]

Mimic the "Disk" processing for 'rawio', but for a scsi_host hostdev
lun device.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/qemu/qemu_domain.c  | 18 ++++++++++++++++++
 src/qemu/qemu_domain.h  |  4 ++++
 src/qemu/qemu_driver.c  |  1 +
 src/qemu/qemu_process.c | 19 +++++++++++++++++++
 4 files changed, 42 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 075406e..95b71b7 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1926,6 +1926,10 @@ void qemuDomainObjCheckTaint(virQEMUDriverPtr driver,
     for (i = 0; i < obj->def->ndisks; i++)
         qemuDomainObjCheckDiskTaint(driver, obj, obj->def->disks[i], logFD);
 
+    for (i = 0; i < obj->def->nhostdevs; i++)
+        qemuDomainObjCheckHostdevTaint(driver, obj, obj->def->hostdevs[i],
+                                       logFD);
+
     for (i = 0; i < obj->def->nnets; i++)
         qemuDomainObjCheckNetTaint(driver, obj, obj->def->nets[i], logFD);
 
@@ -1953,6 +1957,20 @@ void qemuDomainObjCheckDiskTaint(virQEMUDriverPtr driver,
 }
 
 
+void qemuDomainObjCheckHostdevTaint(virQEMUDriverPtr driver,
+                                    virDomainObjPtr obj,
+                                    virDomainHostdevDefPtr hostdev,
+                                    int logFD)
+{
+    virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
+
+    if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI &&
+        scsisrc->rawio == VIR_TRISTATE_BOOL_YES)
+            qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HIGH_PRIVILEGES,
+                               logFD);
+}
+
+
 void qemuDomainObjCheckNetTaint(virQEMUDriverPtr driver,
                                 virDomainObjPtr obj,
                                 virDomainNetDefPtr net,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 4ae2c57..d21acd7 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -301,6 +301,10 @@ void qemuDomainObjCheckDiskTaint(virQEMUDriverPtr driver,
                                  virDomainObjPtr obj,
                                  virDomainDiskDefPtr disk,
                                  int logFD);
+void qemuDomainObjCheckHostdevTaint(virQEMUDriverPtr driver,
+                                    virDomainObjPtr obj,
+                                    virDomainHostdevDefPtr disk,
+                                    int logFD);
 void qemuDomainObjCheckNetTaint(virQEMUDriverPtr driver,
                                 virDomainObjPtr obj,
                                 virDomainNetDefPtr net,
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index f28082f..b888b09 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -6581,6 +6581,7 @@ qemuDomainAttachDeviceLive(virDomainObjPtr vm,
         break;
 
     case VIR_DOMAIN_DEVICE_HOSTDEV:
+        qemuDomainObjCheckHostdevTaint(driver, vm, dev->data.hostdev, -1);
         ret = qemuDomainAttachHostDevice(dom->conn, driver, vm,
                                          dev->data.hostdev);
         if (!ret)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 43cf396..8e3ae9b 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3983,6 +3983,7 @@ int qemuProcessStart(virConnectPtr conn,
     struct qemuProcessHookData hookData;
     unsigned long cur_balloon;
     size_t i;
+    bool rawio_set = false;
     char *nodeset = NULL;
     virBitmapPtr nodemask = NULL;
     unsigned int stop_flags;
@@ -4360,6 +4361,7 @@ int qemuProcessStart(virConnectPtr conn,
         if (vm->def->disks[i]->rawio == VIR_TRISTATE_BOOL_YES) {
 #ifdef CAP_SYS_RAWIO
             virCommandAllowCap(cmd, CAP_SYS_RAWIO);
+            rawio_set = true;
 #else
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                            _("Raw I/O is not supported on this platform"));
@@ -4376,6 +4378,23 @@ int qemuProcessStart(virConnectPtr conn,
             goto cleanup;
     }
 
+    /* If rawio not already set, check hostdevs as well */
+    if (!rawio_set) {
+        for (i = 0; i < vm->def->nhostdevs; i++) {
+            virDomainHostdevSubsysSCSIPtr scsisrc =
+                &vm->def->hostdevs[i]->source.subsys.u.scsi;
+            if (scsisrc->rawio == VIR_TRISTATE_BOOL_YES) {
+#ifdef CAP_SYS_RAWIO
+                virCommandAllowCap(cmd, CAP_SYS_RAWIO);
+#else
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                               _("Raw I/O is not supported on this platform"));
+                goto cleanup;
+#endif
+            }
+        }
+    }
+
     virCommandSetPreExecHook(cmd, qemuProcessHook, &hookData);
     virCommandSetMaxProcesses(cmd, cfg->maxProcesses);
     virCommandSetMaxFiles(cmd, cfg->maxFiles);
-- 
1.9.3