Re: [PATCHv1.5 04/27] qemuxml2argv: Add test for disk type='volume' with iSCSI pools

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On 27/11/13 00:48, Peter Krempa wrote:
Tweak the existing file so that it can be tested for command line
corectness.

It's actually lots of change,  should provide detailed commit log.

---
  src/conf/domain_conf.h                             |   1 +
  src/libvirt_private.syms                           |   1 +
  src/qemu/qemu_command.c                            |  76 +-----------
  src/qemu/qemu_conf.c                               | 129 ++++++++++++++-------
  src/qemu/qemu_conf.h                               |   2 +
  .../qemuxml2argv-disk-source-pool-mode.args        |  10 ++
  .../qemuxml2argv-disk-source-pool-mode.xml         |   4 +-
  tests/qemuxml2argvtest.c                           |   2 +
  8 files changed, 112 insertions(+), 113 deletions(-)
  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.args

diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 4561ccc..a5ef2ca 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -686,6 +686,7 @@ struct _virDomainDiskSourcePoolDef {
      char *volume; /* volume name */
      int voltype; /* enum virStorageVolType, internal only */
      int pooltype; /* enum virStoragePoolType, internal only */
+    int actualtype; /* enum virDomainDiskType, internal only */
      int mode; /* enum virDomainDiskSourcePoolMode */
  };
  typedef virDomainDiskSourcePoolDef *virDomainDiskSourcePoolDefPtr;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 205fe56..aeb3568 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -693,6 +693,7 @@ virStoragePoolSourceFree;
  virStoragePoolSourceListFormat;
  virStoragePoolSourceListNewSource;
  virStoragePoolTypeFromString;
+virStoragePoolTypeToString;
  virStorageVolDefFindByKey;
  virStorageVolDefFindByName;
  virStorageVolDefFindByPath;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 763417f..b8129a3 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3775,69 +3775,6 @@ qemuBuildNBDString(virConnectPtr conn, virDomainDiskDefPtr disk, virBufferPtr op
      return 0;
  }

-static int
-qemuBuildVolumeString(virConnectPtr conn,
-                      virDomainDiskDefPtr disk,
-                      virBufferPtr opt)

Wondering why this is completely removed, before going ahead...

-{
-    int ret = -1;
-
-    switch ((virStorageVolType) disk->srcpool->voltype) {
-    case VIR_STORAGE_VOL_DIR:
-        if (!disk->readonly) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("cannot create virtual FAT disks in read-write mode"));
-            goto cleanup;
-        }
-        if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
-            virBufferEscape(opt, ',', ",", "file=fat:floppy:%s,", disk->src);
-        else
-            virBufferEscape(opt, ',', ",", "file=fat:%s,", disk->src);
-        break;
-    case VIR_STORAGE_VOL_BLOCK:
-        if (disk->tray_status == VIR_DOMAIN_DISK_TRAY_OPEN) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("tray status 'open' is invalid for "
-                             "block type volume"));

With this removed, I guess one will see different error like:

 _("tray status 'open' is invalid for block type disk"));

I'm doubting it's what we want for a "volume" type disk.

-            goto cleanup;
-        }
-        if (disk->srcpool->pooltype == VIR_STORAGE_POOL_ISCSI) {
-            if (disk->srcpool->mode ==
-                VIR_DOMAIN_DISK_SOURCE_POOL_MODE_DIRECT) {
-                if (qemuBuildISCSIString(conn, disk, opt) < 0)
-                    goto cleanup;
-                virBufferAddChar(opt, ',');
-            } else if (disk->srcpool->mode ==
-                       VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST) {
-                virBufferEscape(opt, ',', ",", "file=%s,", disk->src);

Especially here, I'm wondering if the "mode" attribute for iscsi pool disk still works.

-            }
-        } else {
-            virBufferEscape(opt, ',', ",", "file=%s,", disk->src);
-        }
-        break;
-    case VIR_STORAGE_VOL_FILE:
-        if (disk->auth.username) {
-            if (qemuBuildISCSIString(conn, disk, opt) < 0)
-                goto cleanup;
-            virBufferAddChar(opt, ',');
-        } else {
-            virBufferEscape(opt, ',', ",", "file=%s,", disk->src);
-        }
-        break;
-    case VIR_STORAGE_VOL_NETWORK:
-    case VIR_STORAGE_VOL_NETDIR:
-    case VIR_STORAGE_VOL_LAST:
-        /* Keep the compiler quiet, qemuTranslateDiskSourcePool already
-         * reported the unsupported error.
-         */
-        goto cleanup;
-    }
-
-    ret = 0;
-
-cleanup:
-    return ret;
-}

  char *
  qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
@@ -3851,6 +3788,7 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
          virDomainDiskGeometryTransTypeToString(disk->geometry.trans);
      int idx = virDiskNameToIndex(disk->dst);
      int busid = -1, unitid = -1;
+    int actualType = qemuDiskGetActualType(disk);

      if (idx < 0) {
          virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -3934,12 +3872,13 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,

      /* disk->src is NULL when we use nbd disks */
      if ((disk->src ||
-        (disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK &&
+        (actualType == VIR_DOMAIN_DISK_TYPE_NETWORK &&
           disk->protocol == VIR_DOMAIN_DISK_PROTOCOL_NBD)) &&
          !((disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY ||
             disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM) &&
            disk->tray_status == VIR_DOMAIN_DISK_TRAY_OPEN)) {
-        if (disk->type == VIR_DOMAIN_DISK_TYPE_DIR) {
+
+        if (actualType == VIR_DOMAIN_DISK_TYPE_DIR) {
              /* QEMU only supports magic FAT format for now */
              if (disk->format > 0 && disk->format != VIR_STORAGE_FILE_FAT) {
                  virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -3957,7 +3896,7 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
                                  disk->src);
              else
                  virBufferEscape(&opt, ',', ",", "file=fat:%s,", disk->src);
-        } else if (disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK) {
+        } else if (actualType == VIR_DOMAIN_DISK_TYPE_NETWORK) {
              switch (disk->protocol) {
              case VIR_DOMAIN_DISK_PROTOCOL_NBD:
                  if (qemuBuildNBDString(conn, disk, &opt) < 0)
@@ -4025,11 +3964,8 @@ qemuBuildDriveStr(virConnectPtr conn ATTRIBUTE_UNUSED,
                  virBufferEscape(&opt, ',', ",", "%s,", disk->src);
                  break;
              }
-        } else if (disk->type == VIR_DOMAIN_DISK_TYPE_VOLUME) {
-            if (qemuBuildVolumeString(conn, disk, &opt) < 0)
-                goto error;
          } else {
-            if ((disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK) &&
+            if ((actualType == VIR_DOMAIN_DISK_TYPE_BLOCK) &&
                  (disk->tray_status == VIR_DOMAIN_DISK_TRAY_OPEN)) {
                  virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                                 _("tray status 'open' is invalid for "
diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 77df370..58a0500 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1298,6 +1298,17 @@ cleanup:
      return ret;
  }

+
+int
+qemuDiskGetActualType(virDomainDiskDefPtr def)
+{
+    if (def->type == VIR_DOMAIN_DISK_TYPE_VOLUME)
+        return def->srcpool->actualtype;
+
+    return def->type;
+}
+
+
  int
  qemuTranslateDiskSourcePool(virConnectPtr conn,
                              virDomainDiskDefPtr def)
@@ -1319,72 +1330,108 @@ qemuTranslateDiskSourcePool(virConnectPtr conn,
      if (!(pool = virStoragePoolLookupByName(conn, def->srcpool->pool)))
          return -1;

+    if (virStoragePoolIsActive(pool) != 1) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,

Not sure if it's wise to use "VIR_ERR_CONFIG_UNSUPPORTED" here.

+                       _("storage pool '%s' containing volume '%s' "
+                         "is not active"),
+                       def->srcpool->pool, def->srcpool->volume);
+        goto cleanup;
+    }
+
      if (!(vol = virStorageVolLookupByName(pool, def->srcpool->volume)))
          goto cleanup;

      if (virStorageVolGetInfo(vol, &info) < 0)
          goto cleanup;

-    if (def->startupPolicy &&
-        info.type != VIR_STORAGE_VOL_FILE) {

Why this check is removed?

+    if (!(poolxml = virStoragePoolGetXMLDesc(pool, 0)))
+        goto cleanup;
+
+    if (!(pooldef = virStoragePoolDefParseString(poolxml)))
+        goto cleanup;
+
+    def->srcpool->pooltype = pooldef->type;
+    def->srcpool->voltype = info.type;
+
+    if (def->srcpool->mode && pooldef->type != VIR_STORAGE_POOL_ISCSI) {
          virReportError(VIR_ERR_XML_ERROR, "%s",
-                       _("'startupPolicy' is only valid for 'file' type volume"));
+                       _("disk source mode is only valid when "
+                         "storage pool is of iscsi type"));
          goto cleanup;
      }

-    switch ((virStorageVolType) info.type) {
-    case VIR_STORAGE_VOL_FILE:
-    case VIR_STORAGE_VOL_DIR:
+    switch ((enum virStoragePoolType) pooldef->type) {
+    case VIR_STORAGE_POOL_DIR:
+    case VIR_STORAGE_POOL_FS:
+    case VIR_STORAGE_POOL_NETFS:
+    case VIR_STORAGE_POOL_LOGICAL:
+    case VIR_STORAGE_POOL_DISK:
+    case VIR_STORAGE_POOL_SCSI:
          if (!(def->src = virStorageVolGetPath(vol)))
              goto cleanup;
-        break;
-    case VIR_STORAGE_VOL_BLOCK:
-        if (!(poolxml = virStoragePoolGetXMLDesc(pool, 0)))
-            goto cleanup;
-
-        if (!(pooldef = virStoragePoolDefParseString(poolxml)))
-            goto cleanup;

-        if (def->srcpool->mode && pooldef->type != VIR_STORAGE_POOL_ISCSI) {
-            virReportError(VIR_ERR_XML_ERROR, "%s",
-                           _("disk source mode is only valid when "
-                             "storage pool is of iscsi type"));
+        switch (info.type) {
+        case VIR_STORAGE_VOL_FILE:
+            def->srcpool->actualtype = VIR_DOMAIN_DISK_TYPE_FILE;
+            break;
+
+        case VIR_STORAGE_VOL_DIR:
+            def->srcpool->actualtype = VIR_DOMAIN_DISK_TYPE_DIR;
+            break;
+
+        case VIR_STORAGE_VOL_BLOCK:
+            def->srcpool->actualtype = VIR_DOMAIN_DISK_TYPE_BLOCK;
+            break;
+
+        case VIR_STORAGE_VOL_NETWORK:
+        case VIR_STORAGE_VOL_NETDIR:
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("unexpected storage volume type '%s' "
+                             "for storage pool type '%s'"),
+                           virStorageVolTypeToString(info.type),
+                           virStoragePoolTypeToString(pooldef->type));
              goto cleanup;
          }

-        def->srcpool->pooltype = pooldef->type;
-        if (pooldef->type == VIR_STORAGE_POOL_ISCSI) {
-            /* Default to use the LUN's path on host */
-            if (!def->srcpool->mode)
-                def->srcpool->mode = VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST;
-
-            if (def->srcpool->mode ==
-                VIR_DOMAIN_DISK_SOURCE_POOL_MODE_DIRECT) {
-                if (qemuAddISCSIPoolSourceHost(def, pooldef) < 0)
-                    goto cleanup;
-            } else if (def->srcpool->mode ==
-                       VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST) {
-                if (!(def->src = virStorageVolGetPath(vol)))
-                    goto cleanup;
-            }
+        break;
+
+    case VIR_STORAGE_POOL_ISCSI:
+       switch (def->srcpool->mode) {
+        case VIR_DOMAIN_DISK_SOURCE_POOL_MODE_DEFAULT:
+        case VIR_DOMAIN_DISK_SOURCE_POOL_MODE_LAST:
+            def->srcpool->mode = VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST;
+            def->srcpool->actualtype = VIR_DOMAIN_DISK_TYPE_BLOCK;
+            /* fallthrough */

I'd prefer the old "if...else" statements instead of a "fallthrough", which
explicitly sets the "mode" as VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST
before going ahead.

+        case VIR_DOMAIN_DISK_SOURCE_POOL_MODE_HOST:
+            if (!(def->src = virStorageVolGetPath(vol)))
+                goto cleanup;
+            break;
+
+        case VIR_DOMAIN_DISK_SOURCE_POOL_MODE_DIRECT:
+            def->srcpool->actualtype = VIR_DOMAIN_DISK_TYPE_NETWORK;
+            def->protocol = VIR_DOMAIN_DISK_PROTOCOL_ISCSI;

              if (qemuTranslateDiskSourcePoolAuth(def, pooldef) < 0)
                  goto cleanup;
-        } else {
-            if (!(def->src = virStorageVolGetPath(vol)))
+
+            if (qemuAddISCSIPoolSourceHost(def, pooldef) < 0)
                  goto cleanup;
+            break;
          }
-
          break;
-    case VIR_STORAGE_VOL_NETWORK:
-    case VIR_STORAGE_VOL_NETDIR:
-    case VIR_STORAGE_VOL_LAST:
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                       _("Using network volume as disk source is not supported"));
+
+    case VIR_STORAGE_POOL_MPATH:
+    case VIR_STORAGE_POOL_RBD:
+    case VIR_STORAGE_POOL_SHEEPDOG:
+    case VIR_STORAGE_POOL_GLUSTER:
+    case VIR_STORAGE_POOL_LAST:
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("using '%s' pools for backing 'volume' disks "
+                         "isn't yet supported"),
+                       virStoragePoolTypeToString(pooldef->type));
          goto cleanup;
      }

-    def->srcpool->voltype = info.type;
      ret = 0;
  cleanup:
      if (ret < 0)
diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h
index f9ff7af..b9786b1 100644
--- a/src/qemu/qemu_conf.h
+++ b/src/qemu/qemu_conf.h
@@ -304,6 +304,8 @@ int qemuSetUnprivSGIO(virDomainDeviceDefPtr dev);
  int qemuDriverAllocateID(virQEMUDriverPtr driver);
  virDomainXMLOptionPtr virQEMUDriverCreateXMLConf(virQEMUDriverPtr driver);

+int qemuDiskGetActualType(virDomainDiskDefPtr def);
+
  int qemuTranslateDiskSourcePool(virConnectPtr conn,
                                  virDomainDiskDefPtr def);

diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.args b/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.args
new file mode 100644
index 0000000..8f6a3dd
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.args
@@ -0,0 +1,10 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -nodefconfig -nodefaults \
+-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb -drive \
+file=/some/block/device/unit:0:0:1,if=none,media=cdrom,id=drive-ide0-0-1 -device \
+ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive \
+file=iscsi://iscsi.example.com:3260/demo-target/2,if=none,media=cdrom,id=drive-ide0-0-2 \
+-device ide-drive,bus=ide.0,unit=2,drive=drive-ide0-0-2,id=ide0-0-2 -drive \
+file=/tmp/idedisk.img,if=none,id=drive-ide0-0-3 -device \
+ide-drive,bus=ide.0,unit=3,drive=drive-ide0-0-3,id=ide0-0-3 -device \
+virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.xml b/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.xml
index b907633..9f90293 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-disk-source-pool-mode.xml
@@ -15,7 +15,7 @@
    <devices>
      <emulator>/usr/bin/qemu</emulator>
      <disk type='volume' device='cdrom'>
-      <source pool='blk-pool0' volume='blk-pool0-vol0' mode='host' startupPolicy='optional'>
+      <source pool='pool-iscsi-auth' volume='unit:0:0:1' mode='host'>

Same question as above.

It seems this patch destroyed the "mode" attr for iscsi pool disk completely
with this patch. It again asks for the detailed commit log, since the changes
looks rather aggressive, which may cause regression.

Osier

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