On 08.11.2014 17:48, Conrad Meyer wrote:
We still default to bhyveloader(1) if no explicit bootloader
configuration is supplied in the domain.
If the /domain/bootloader looks like grub-bhyve and the user doesn't
supply /domain/bootloader_args, we make an intelligent guess and try
chainloading the first partition on the disk (or a CD if one exists,
under the assumption that for a VM a CD is likely an install source).
Caveat: Assumes the HDD boots from the msdos1 partition. I think this is
a pretty reasonable assumption for a VM. (DrvBhyve with Bhyveload
already assumes that the first disk should be booted.)
I've tested both HDD and CD boot and they seem to work.
---
docs/drvbhyve.html.in | 100 +++++++++++++++++++++++++--
docs/formatdomain.html.in | 4 +-
src/bhyve/bhyve_command.c | 173 +++++++++++++++++++++++++++++++++++++++++-----
src/bhyve/bhyve_command.h | 5 +-
src/bhyve/bhyve_driver.c | 3 +-
src/bhyve/bhyve_process.c | 38 +++++++++-
6 files changed, 295 insertions(+), 28 deletions(-)
diff --git a/src/bhyve/bhyve_command.c b/src/bhyve/bhyve_command.c
index bea4a59..203495c 100644
--- a/src/bhyve/bhyve_command.c
+++ b/src/bhyve/bhyve_command.c
@@ -26,6 +26,8 @@
#include <net/if_tap.h>
#include "bhyve_command.h"
+#include "bhyve_domain.h"
+#include "datatypes.h"
#include "viralloc.h"
#include "virfile.h"
#include "virstring.h"
@@ -294,51 +296,186 @@ virBhyveProcessBuildDestroyCmd(bhyveConnPtr driver
ATTRIBUTE_UNUSED,
return cmd;
}
-virCommandPtr
-virBhyveProcessBuildLoadCmd(virConnectPtr conn,
- virDomainDefPtr def)
+static void
+virAppendBootloaderArgs(virCommandPtr cmd, virDomainDefPtr def)
+{
+ char **blargs;
+
+ /* XXX: Handle quoted? */
+ blargs = virStringSplit(def->os.bootloaderArgs, " ", 0);
+ virCommandAddArgSet(cmd, (const char * const *)blargs);
+ virStringFreeList(blargs);
+}
+
+static virCommandPtr
+virBhyveProcessBuildBhyveloadCmd(virDomainDefPtr def, virDomainDiskDefPtr disk)
{
virCommandPtr cmd;
- virDomainDiskDefPtr disk;
- if (def->ndisks < 1) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("domain should have at least one disk defined"));
+ cmd = virCommandNew(BHYVELOAD);
+
+ if (def->os.bootloaderArgs == NULL) {
+ VIR_DEBUG("bhyveload with default arguments");
+
+ /* Memory (MB) */
+ virCommandAddArg(cmd, "-m");
+ virCommandAddArgFormat(cmd, "%llu",
+ VIR_DIV_UP(def->mem.max_balloon, 1024));
One of the things I'm worried about is, if the boot args are not
specified we properly add memory configured in domain XML.
+
+ /* Image path */
+ virCommandAddArg(cmd, "-d");
+ virCommandAddArg(cmd, virDomainDiskGetSource(disk));
+
+ /* VM name */
+ virCommandAddArg(cmd, def->name);
+ } else {
+ VIR_DEBUG("bhyveload with arguments");
+ virAppendBootloaderArgs(cmd, def);
+ }
+
However, IIUC the memory amount can be overridden with boot args. Is
that expected?
+ return cmd;
+}
+
+static virCommandPtr
+virBhyveProcessBuildCustomLoaderCmd(virDomainDefPtr def)
+{
+ virCommandPtr cmd;
+
+ if (def->os.bootloaderArgs == NULL) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Custom loader requires explicit %s configuration"),
+ "bootloader_args");
return NULL;
}
- disk = def->disks[0];
+ VIR_DEBUG("custom loader '%s' with arguments", def->os.bootloader);
+
+ cmd = virCommandNew(def->os.bootloader);
+ virAppendBootloaderArgs(cmd, def);
+ return cmd;
+}
+
+static bool
+virBhyveUsableDisk(virConnectPtr conn, virDomainDiskDefPtr disk)
+{
if (virStorageTranslateDiskSourcePool(conn, disk) < 0)
- return NULL;
+ return false;
if ((disk->device != VIR_DOMAIN_DISK_DEVICE_DISK) &&
(disk->device != VIR_DOMAIN_DISK_DEVICE_CDROM)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("unsupported disk device"));
- return NULL;
+ return false;
}
if ((virDomainDiskGetType(disk) != VIR_STORAGE_TYPE_FILE) &&
(virDomainDiskGetType(disk) != VIR_STORAGE_TYPE_VOLUME)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("unsupported disk type"));
- return NULL;
+ return false;
}
- cmd = virCommandNew(BHYVELOAD);
+ return true;
+}
- /* Memory */
- virCommandAddArg(cmd, "-m");
+static virCommandPtr
+virBhyveProcessBuildGrubbhyveCmd(virDomainDefPtr def,
+ virConnectPtr conn,
+ const char *devmap_file,
+ char **devicesmap_out)
+{
+ virDomainDiskDefPtr disk, cd;
+ virBuffer devicemap;
+ virCommandPtr cmd;
+ size_t i;
+
+ if (def->os.bootloaderArgs != NULL)
+ return virBhyveProcessBuildCustomLoaderCmd(def);
+
+ devicemap = (virBuffer)VIR_BUFFER_INITIALIZER;
+
+ /* Search disk list for CD or HDD device. */
+ cd = disk = NULL;
+ for (i = 0; i < def->ndisks; i++) {
+ if (!virBhyveUsableDisk(conn, def->disks[i]))
+ continue;
+
+ if (cd == NULL &&
+ def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_CDROM) {
+ cd = def->disks[i];
+ VIR_INFO("Picking %s as boot CD", virDomainDiskGetSource(cd));
+ }
+
+ if (disk == NULL &&
+ def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_DISK) {
+ disk = def->disks[i];
+ VIR_INFO("Picking %s as HDD", virDomainDiskGetSource(disk));
+ }
Can we utilize <boot order='X'/> attribute here?
+ }
+
+ cmd = virCommandNew(def->os.bootloader);
+
+ VIR_DEBUG("grub-bhyve with default arguments");
+
+ if (devicesmap_out != NULL) {
+ /* Grub device.map (just for boot) */
+ if (disk != NULL)
+ virBufferAsprintf(&devicemap, "(hd0) %s\n",
+ virDomainDiskGetSource(disk));
+
+ if (cd != NULL)
+ virBufferAsprintf(&devicemap, "(cd) %s\n",
+ virDomainDiskGetSource(cd));
+
+ *devicesmap_out = virBufferContentAndReset(&devicemap);
+ }
+
+ if (cd != NULL) {
+ virCommandAddArg(cmd, "--root");
+ virCommandAddArg(cmd, "cd");
+ } else {
+ virCommandAddArg(cmd, "--root");
+ virCommandAddArg(cmd, "hd0,msdos1");
+ }
+
+ virCommandAddArg(cmd, "--device-map");
+ virCommandAddArg(cmd, devmap_file);
+
+ /* Memory in MB */
+ virCommandAddArg(cmd, "--memory");
virCommandAddArgFormat(cmd, "%llu",
VIR_DIV_UP(def->mem.max_balloon, 1024));
- /* Image path */
- virCommandAddArg(cmd, "-d");
- virCommandAddArg(cmd, virDomainDiskGetSource(disk));
-
/* VM name */
virCommandAddArg(cmd, def->name);
return cmd;
}
Otherwise looking good.
Michal
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