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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 04/13] libxl: move libxl_device_disk_add to libxl_device
Move the code of this function to libxl_device.c so it can be made
asyncronious later on the series. The static function
libxl__device_from_disk also has to be moved to libxl_device and it is
no longer static.
The code will be fixed in a latter patch, replacing libxl__sprintf,
LIBXL_LOG* and lines > 80.
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Signed-off-by: Roger Pau Monne <roger.pau@xxxxxxxxxx>
---
tools/libxl/libxl.c | 152 +---------------------------------------
tools/libxl/libxl_device.c | 159 ++++++++++++++++++++++++++++++++++++++++++
tools/libxl/libxl_internal.h | 5 ++
3 files changed, 166 insertions(+), 150 deletions(-)
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 2a09192..2d8abd0 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -1281,161 +1281,13 @@ int libxl__device_disk_setdefault(libxl__gc *gc,
libxl_device_disk *disk)
return rc;
}
-static int libxl__device_from_disk(libxl__gc *gc, uint32_t domid,
- libxl_device_disk *disk,
- libxl__device *device)
-{
- libxl_ctx *ctx = libxl__gc_owner(gc);
- int devid;
-
- devid = libxl__device_disk_dev_number(disk->vdev, NULL, NULL);
- if (devid==-1) {
- LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Invalid or unsupported"
- " virtual disk identifier %s", disk->vdev);
- return ERROR_INVAL;
- }
-
- device->backend_domid = disk->backend_domid;
- device->backend_devid = devid;
-
- switch (disk->backend) {
- case LIBXL_DISK_BACKEND_PHY:
- device->backend_kind = LIBXL__DEVICE_KIND_VBD;
- break;
- case LIBXL_DISK_BACKEND_TAP:
- device->backend_kind = LIBXL__DEVICE_KIND_VBD;
- break;
- case LIBXL_DISK_BACKEND_QDISK:
- device->backend_kind = LIBXL__DEVICE_KIND_QDISK;
- break;
- default:
- LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend type:
%d\n",
- disk->backend);
- return ERROR_INVAL;
- }
-
- device->domid = domid;
- device->devid = devid;
- device->kind = LIBXL__DEVICE_KIND_VBD;
-
- return 0;
-}
-
int libxl_device_disk_add(libxl_ctx *ctx, uint32_t domid, libxl_device_disk
*disk)
{
GC_INIT(ctx);
- flexarray_t *front;
- flexarray_t *back;
- char *dev;
- libxl__device device;
- int major, minor, rc;
-
- rc = libxl__device_disk_setdefault(gc, disk);
- if (rc) goto out;
-
- front = flexarray_make(16, 1);
- if (!front) {
- rc = ERROR_NOMEM;
- goto out;
- }
- back = flexarray_make(16, 1);
- if (!back) {
- rc = ERROR_NOMEM;
- goto out_free;
- }
-
- if (disk->script) {
- LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "External block scripts"
- " not yet supported, sorry");
- rc = ERROR_INVAL;
- goto out_free;
- }
-
- rc = libxl__device_from_disk(gc, domid, disk, &device);
- if (rc != 0) {
- LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Invalid or unsupported"
- " virtual disk identifier %s", disk->vdev);
- goto out_free;
- }
-
- switch (disk->backend) {
- case LIBXL_DISK_BACKEND_PHY:
- dev = disk->pdev_path;
- do_backend_phy:
- libxl__device_physdisk_major_minor(dev, &major, &minor);
- flexarray_append(back, "physical-device");
- flexarray_append(back, libxl__sprintf(gc, "%x:%x", major, minor));
-
- flexarray_append(back, "params");
- flexarray_append(back, dev);
-
- assert(device.backend_kind == LIBXL__DEVICE_KIND_VBD);
- break;
- case LIBXL_DISK_BACKEND_TAP:
- dev = libxl__blktap_devpath(gc, disk->pdev_path, disk->format);
- if (!dev) {
- LOG(ERROR, "failed to get blktap devpath for %p\n",
- disk->pdev_path);
- rc = ERROR_FAIL;
- goto out_free;
- }
- flexarray_append(back, "tapdisk-params");
- flexarray_append(back, libxl__sprintf(gc, "%s:%s",
- libxl__device_disk_string_of_format(disk->format),
- disk->pdev_path));
-
- /* now create a phy device to export the device to the guest */
- goto do_backend_phy;
- case LIBXL_DISK_BACKEND_QDISK:
- flexarray_append(back, "params");
- flexarray_append(back, libxl__sprintf(gc, "%s:%s",
- libxl__device_disk_string_of_format(disk->format),
disk->pdev_path));
- assert(device.backend_kind == LIBXL__DEVICE_KIND_QDISK);
- break;
- default:
- LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend type:
%d\n", disk->backend);
- rc = ERROR_INVAL;
- goto out_free;
- }
-
- flexarray_append(back, "frontend-id");
- flexarray_append(back, libxl__sprintf(gc, "%d", domid));
- flexarray_append(back, "online");
- flexarray_append(back, "1");
- flexarray_append(back, "removable");
- flexarray_append(back, libxl__sprintf(gc, "%d", (disk->removable) ? 1 :
0));
- flexarray_append(back, "bootable");
- flexarray_append(back, libxl__sprintf(gc, "%d", 1));
- flexarray_append(back, "state");
- flexarray_append(back, libxl__sprintf(gc, "%d", 1));
- flexarray_append(back, "dev");
- flexarray_append(back, disk->vdev);
- flexarray_append(back, "type");
- flexarray_append(back,
libxl__device_disk_string_of_backend(disk->backend));
- flexarray_append(back, "mode");
- flexarray_append(back, disk->readwrite ? "w" : "r");
- flexarray_append(back, "device-type");
- flexarray_append(back, disk->is_cdrom ? "cdrom" : "disk");
-
- flexarray_append(front, "backend-id");
- flexarray_append(front, libxl__sprintf(gc, "%d", disk->backend_domid));
- flexarray_append(front, "state");
- flexarray_append(front, libxl__sprintf(gc, "%d", 1));
- flexarray_append(front, "virtual-device");
- flexarray_append(front, libxl__sprintf(gc, "%d", device.devid));
- flexarray_append(front, "device-type");
- flexarray_append(front, disk->is_cdrom ? "cdrom" : "disk");
-
- libxl__device_generic_add(gc, &device,
- libxl__xs_kvs_of_flexarray(gc, back, back->count),
- libxl__xs_kvs_of_flexarray(gc, front,
front->count));
+ int rc;
- rc = 0;
+ rc = libxl__device_disk_add(gc, domid, disk);
-out_free:
- flexarray_free(back);
- flexarray_free(front);
-out:
GC_FREE;
return rc;
}
diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
index c7e057d..304929a 100644
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -249,6 +249,165 @@ char
*libxl__device_disk_string_of_backend(libxl_disk_backend backend)
}
}
+int libxl__device_from_disk(libxl__gc *gc, uint32_t domid,
+ libxl_device_disk *disk,
+ libxl__device *device)
+{
+ libxl_ctx *ctx = libxl__gc_owner(gc);
+ int devid;
+
+ devid = libxl__device_disk_dev_number(disk->vdev, NULL, NULL);
+ if (devid==-1) {
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Invalid or unsupported"
+ " virtual disk identifier %s", disk->vdev);
+ return ERROR_INVAL;
+ }
+
+ device->backend_domid = disk->backend_domid;
+ device->backend_devid = devid;
+
+ switch (disk->backend) {
+ case LIBXL_DISK_BACKEND_PHY:
+ device->backend_kind = LIBXL__DEVICE_KIND_VBD;
+ break;
+ case LIBXL_DISK_BACKEND_TAP:
+ device->backend_kind = LIBXL__DEVICE_KIND_VBD;
+ break;
+ case LIBXL_DISK_BACKEND_QDISK:
+ device->backend_kind = LIBXL__DEVICE_KIND_QDISK;
+ break;
+ default:
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend type:
%d\n",
+ disk->backend);
+ return ERROR_INVAL;
+ }
+
+ device->domid = domid;
+ device->devid = devid;
+ device->kind = LIBXL__DEVICE_KIND_VBD;
+
+ return 0;
+}
+
+int libxl__device_disk_add(libxl__gc *gc, uint32_t domid,
+ libxl_device_disk *disk)
+{
+ libxl_ctx *ctx = CTX;
+ flexarray_t *front;
+ flexarray_t *back;
+ char *dev;
+ libxl__device device;
+ int major, minor, rc;
+
+ rc = libxl__device_disk_setdefault(gc, disk);
+ if (rc) goto out;
+
+ front = flexarray_make(16, 1);
+ if (!front) {
+ rc = ERROR_NOMEM;
+ goto out;
+ }
+ back = flexarray_make(16, 1);
+ if (!back) {
+ rc = ERROR_NOMEM;
+ goto out_free;
+ }
+
+ if (disk->script) {
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "External block scripts"
+ " not yet supported, sorry");
+ rc = ERROR_INVAL;
+ goto out_free;
+ }
+
+ rc = libxl__device_from_disk(gc, domid, disk, &device);
+ if (rc != 0) {
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Invalid or unsupported"
+ " virtual disk identifier %s", disk->vdev);
+ goto out_free;
+ }
+
+ switch (disk->backend) {
+ case LIBXL_DISK_BACKEND_PHY:
+ dev = disk->pdev_path;
+ do_backend_phy:
+ libxl__device_physdisk_major_minor(dev, &major, &minor);
+ flexarray_append(back, "physical-device");
+ flexarray_append(back, libxl__sprintf(gc, "%x:%x", major, minor));
+
+ flexarray_append(back, "params");
+ flexarray_append(back, dev);
+
+ assert(device.backend_kind == LIBXL__DEVICE_KIND_VBD);
+ break;
+ case LIBXL_DISK_BACKEND_TAP:
+ dev = libxl__blktap_devpath(gc, disk->pdev_path, disk->format);
+ if (!dev) {
+ LOG(ERROR, "failed to get blktap devpath for %p\n",
+ disk->pdev_path);
+ rc = ERROR_FAIL;
+ goto out_free;
+ }
+ flexarray_append(back, "tapdisk-params");
+ flexarray_append(back, libxl__sprintf(gc, "%s:%s",
+ libxl__device_disk_string_of_format(disk->format),
+ disk->pdev_path));
+
+ /* now create a phy device to export the device to the guest */
+ goto do_backend_phy;
+ case LIBXL_DISK_BACKEND_QDISK:
+ flexarray_append(back, "params");
+ flexarray_append(back, libxl__sprintf(gc, "%s:%s",
+ libxl__device_disk_string_of_format(disk->format),
disk->pdev_path));
+ assert(device.backend_kind == LIBXL__DEVICE_KIND_QDISK);
+ break;
+ default:
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend type:
%d\n", disk->backend);
+ rc = ERROR_INVAL;
+ goto out_free;
+ }
+
+ flexarray_append(back, "frontend-id");
+ flexarray_append(back, libxl__sprintf(gc, "%d", domid));
+ flexarray_append(back, "online");
+ flexarray_append(back, "1");
+ flexarray_append(back, "removable");
+ flexarray_append(back, libxl__sprintf(gc, "%d", (disk->removable) ? 1 :
0));
+ flexarray_append(back, "bootable");
+ flexarray_append(back, libxl__sprintf(gc, "%d", 1));
+ flexarray_append(back, "state");
+ flexarray_append(back, libxl__sprintf(gc, "%d", 1));
+ flexarray_append(back, "dev");
+ flexarray_append(back, disk->vdev);
+ flexarray_append(back, "type");
+ flexarray_append(back,
libxl__device_disk_string_of_backend(disk->backend));
+ flexarray_append(back, "mode");
+ flexarray_append(back, disk->readwrite ? "w" : "r");
+ flexarray_append(back, "device-type");
+ flexarray_append(back, disk->is_cdrom ? "cdrom" : "disk");
+
+ flexarray_append(front, "backend-id");
+ flexarray_append(front, libxl__sprintf(gc, "%d", disk->backend_domid));
+ flexarray_append(front, "state");
+ flexarray_append(front, libxl__sprintf(gc, "%d", 1));
+ flexarray_append(front, "virtual-device");
+ flexarray_append(front, libxl__sprintf(gc, "%d", device.devid));
+ flexarray_append(front, "device-type");
+ flexarray_append(front, disk->is_cdrom ? "cdrom" : "disk");
+
+ libxl__device_generic_add(gc, &device,
+ libxl__xs_kvs_of_flexarray(gc, back, back->count),
+ libxl__xs_kvs_of_flexarray(gc, front,
front->count));
+
+ rc = 0;
+
+out_free:
+ flexarray_free(back);
+ flexarray_free(front);
+out:
+ return rc;
+}
+
int libxl__device_physdisk_major_minor(const char *physpath, int *major, int
*minor)
{
struct stat buf;
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index ae5527b..87c9366 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -780,6 +780,11 @@ _hidden int libxl__domain_pvcontrol_write(libxl__gc *gc,
xs_transaction_t t,
_hidden char *libxl__device_disk_string_of_backend(libxl_disk_backend backend);
_hidden char *libxl__device_disk_string_of_format(libxl_disk_format format);
_hidden int libxl__device_disk_set_backend(libxl__gc*, libxl_device_disk*);
+_hidden int libxl__device_from_disk(libxl__gc *gc, uint32_t domid,
+ libxl_device_disk *disk,
+ libxl__device *device);
+_hidden int libxl__device_disk_add(libxl__gc *gc, uint32_t domid,
+ libxl_device_disk *disk);
_hidden int libxl__device_physdisk_major_minor(const char *physpath, int
*major, int *minor);
_hidden int libxl__device_disk_dev_number(const char *virtpath,
--
1.7.7.5 (Apple Git-26)
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