[PATCH 33/36] qemu: driver: Don't allow certain operations with FD-passed disks

[Peter Krempa <pkrempa@xxxxxxxxxx>]

Probing stats and block copy to a FD passed image is not yet supported.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/qemu/qemu_driver.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c086d4069b..4df7f42ae4 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -10499,6 +10499,13 @@ qemuDomainBlockPeek(virDomainPtr dom,
         goto cleanup;
     }

+    if (virStorageSourceIsFD(disk->src)) {
+        virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+                       _("peeking is not supported for FD-passed images"));
+        goto cleanup;
+
+    }
+
     if (qemuDomainStorageFileInit(driver, vm, disk->src, NULL) < 0)
         goto cleanup;

@@ -10858,6 +10865,12 @@ qemuDomainGetBlockInfo(virDomainPtr dom,
         goto endjob;
     }

+    if (virStorageSourceIsFD(disk->src)) {
+        virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+                       _("block info is not supported for fd-passed disk image"));
+        goto endjob;
+    }
+
     /* for inactive domains we have to peek into the files */
     if (!virDomainObjIsActive(vm)) {
         if ((qemuStorageLimitsRefresh(driver, cfg, vm, disk->src, false)) < 0)
@@ -14689,6 +14702,12 @@ qemuDomainBlockCopyCommon(virDomainObj *vm,
     if (!qemuDomainDiskBlockJobIsSupported(disk))
         goto endjob;

+    if (virStorageSourceIsFD(mirror)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("copy to a FD passed disk source is not yet supported"));
+        goto endjob;
+    }
+
     if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN &&
         virDomainDiskDefSourceLUNValidate(mirror) < 0)
         goto endjob;
@@ -17942,6 +17961,9 @@ qemuDomainGetStatsOneBlockFallback(virQEMUDriver *driver,
     if (virStorageSourceIsEmpty(src))
         return 0;

+    if (virStorageSourceIsFD(src))
+        return 0;
+
     if (qemuStorageLimitsRefresh(driver, cfg, dom, src, true) <= 0) {
         virResetLastError();
         return 0;
-- 
2.38.1