From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
This patch adds a function to check the version of the device model.
Depending on the version of the DM, the command line arguments will be
built differently.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
tools/libxl/libxl.c | 160 ++++++++++++++++++++++++++++++++++++++++++++-
tools/libxl/libxl_utils.c | 78 ++++++++++++++++++++++
tools/libxl/libxl_utils.h | 6 ++
3 files changed, 243 insertions(+), 1 deletions(-)
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 732772c..40c7255 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -964,7 +964,7 @@ skip_autopass:
return 0;
}
-static char ** libxl_build_device_model_args(libxl_ctx *ctx,
+static char ** libxl_build_device_model_args_old(libxl_ctx *ctx,
libxl_device_model_info *info,
libxl_device_nic *vifs,
int num_vifs)
@@ -1098,10 +1098,168 @@ static char ** libxl_build_device_model_args(libxl_ctx
*ctx,
else
flexarray_set(dm_args, num++, "xenfv");
flexarray_set(dm_args, num++, NULL);
+ return (char **) flexarray_contents(dm_args);
+}
+
+static char ** libxl_build_device_model_args_new(libxl_ctx *ctx,
+ libxl_device_model_info *info,
+ libxl_device_nic *vifs,
+ int num_vifs)
+{
+ int num = 0, i;
+ flexarray_t *dm_args;
+ int nb;
+ libxl_device_disk *disks;
+
+ dm_args = flexarray_make(16, 1);
+ if (!dm_args)
+ return NULL;
+
+ flexarray_set(dm_args, num++, "qemu-system-xen");
+ flexarray_set(dm_args, num++, "-xen-domid");
+
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx, "%d", info->domid));
+
+ if (info->dom_name) {
+ flexarray_set(dm_args, num++, "-name");
+ flexarray_set(dm_args, num++, info->dom_name);
+ }
+ if (info->vnc || info->vncdisplay || info->vnclisten || info->vncunused) {
+ int display = 0;
+ const char *listen = "127.0.0.1";
+
+ flexarray_set(dm_args, num++, "-vnc");
+
+ if (info->vncdisplay) {
+ display = info->vncdisplay;
+ if (info->vnclisten && strchr(info->vnclisten, ':') == NULL) {
+ listen = info->vnclisten;
+ }
+ } else if (info->vnclisten) {
+ listen = info->vnclisten;
+ }
+
+ if (strchr(listen, ':') != NULL)
+ flexarray_set(dm_args, num++,
+ libxl_sprintf(ctx, "%s%s", listen,
+ info->vncunused ? ",to=99" : ""));
+ else
+ flexarray_set(dm_args, num++,
+ libxl_sprintf(ctx, "%s:%d%s", listen, display,
+ info->vncunused ? ",to=99" : ""));
+ }
+ if (info->sdl) {
+ flexarray_set(dm_args, num++, "-sdl");
+ }
+ if (info->keymap) {
+ flexarray_set(dm_args, num++, "-k");
+ flexarray_set(dm_args, num++, info->keymap);
+ }
+ if (info->nographic && (!info->sdl && !info->vnc)) {
+ flexarray_set(dm_args, num++, "-nographic");
+ }
+ if (info->serial) {
+ flexarray_set(dm_args, num++, "-serial");
+ flexarray_set(dm_args, num++, info->serial);
+ }
+ if (info->type == XENFV) {
+ int ioemu_vifs = 0;
+
+ if (info->stdvga) {
+ flexarray_set(dm_args, num++, "-vga");
+ flexarray_set(dm_args, num++, "std");
+ }
+
+ if (info->boot) {
+ flexarray_set(dm_args, num++, "-boot");
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx, "order=%s",
info->boot));
+ }
+ if (info->usb || info->usbdevice) {
+ flexarray_set(dm_args, num++, "-usb");
+ if (info->usbdevice) {
+ flexarray_set(dm_args, num++, "-usbdevice");
+ flexarray_set(dm_args, num++, info->usbdevice);
+ }
+ }
+ if (info->soundhw) {
+ flexarray_set(dm_args, num++, "-soundhw");
+ flexarray_set(dm_args, num++, info->soundhw);
+ }
+ if (!info->apic) {
+ flexarray_set(dm_args, num++, "-no-acpi");
+ }
+ if (info->vcpus > 1) {
+ flexarray_set(dm_args, num++, "-smp");
+ if (info->vcpu_avail)
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx,
"%d,maxcpus=%d", info->vcpus, info->vcpu_avail));
+ else
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx, "%d",
info->vcpus));
+ }
+ for (i = 0; i < num_vifs; i++) {
+ if (vifs[i].nictype == NICTYPE_IOEMU) {
+ char *smac = libxl_sprintf(ctx,
"%02x:%02x:%02x:%02x:%02x:%02x",
+ vifs[i].mac[0], vifs[i].mac[1],
vifs[i].mac[2],
+ vifs[i].mac[3], vifs[i].mac[4],
vifs[i].mac[5]);
+ if (!vifs[i].ifname)
+ vifs[i].ifname = libxl_sprintf(ctx, "tap%d.%d",
info->domid, vifs[i].devid - 1);
+ flexarray_set(dm_args, num++, "-net");
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx,
"nic,vlan=%d,macaddr=%s,model=%s",
+ vifs[i].devid, smac, vifs[i].model));
+ flexarray_set(dm_args, num++, "-net");
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx,
"tap,vlan=%d,ifname=%s,script=%s",
+ vifs[i].devid, vifs[i].ifname,
"/etc/xen/scripts/qemu-ifup"));
+ ioemu_vifs++;
+ }
+ }
+ /* If we have no emulated nics, tell qemu not to create any */
+ if ( ioemu_vifs == 0 ) {
+ flexarray_set(dm_args, num++, "-net");
+ flexarray_set(dm_args, num++, "none");
+ }
+ }
+ if (info->saved_state) {
+ flexarray_set(dm_args, num++, "-loadvm");
+ flexarray_set(dm_args, num++, info->saved_state);
+ }
+ for (i = 0; info->extra && info->extra[i] != NULL; i++)
+ flexarray_set(dm_args, num++, info->extra[i]);
+ flexarray_set(dm_args, num++, "-M");
+ if (info->type == XENPV)
+ flexarray_set(dm_args, num++, "xenpv");
+ else
+ flexarray_set(dm_args, num++, "xenfv");
+ disks = libxl_device_disk_list(ctx, info->domid, &nb);
+ for (; nb > 0; --nb, ++disks) {
+ if ( disks->is_cdrom ) {
+ flexarray_set(dm_args, num++, "-cdrom");
+ flexarray_set(dm_args, num++, disks->physpath);
+ }else{
+ flexarray_set(dm_args, num++, libxl_sprintf(ctx, "-%s",
disks->virtpath));
+ flexarray_set(dm_args, num++, disks->physpath);
+ }
+ }
+
+ flexarray_set(dm_args, num++, NULL);
return (char **) flexarray_contents(dm_args);
}
+static char ** libxl_build_device_model_args(libxl_ctx *ctx,
+ libxl_device_model_info *info,
+ libxl_device_nic *vifs,
+ int num_vifs)
+{
+ int new_qemu;
+
+ new_qemu = libxl_check_device_model_version(ctx, info->device_model);
+
+ if (new_qemu == 1) {
+ return libxl_build_device_model_args_new(ctx, info, vifs, num_vifs);
+ } else {
+ return libxl_build_device_model_args_old(ctx, info, vifs, num_vifs);
+ }
+}
+
void dm_xenstore_record_pid(void *for_spawn, pid_t innerchild)
{
libxl_device_model_starting *starting = for_spawn;
diff --git a/tools/libxl/libxl_utils.c b/tools/libxl/libxl_utils.c
index 8a1fa5a..a6417bb 100644
--- a/tools/libxl/libxl_utils.c
+++ b/tools/libxl/libxl_utils.c
@@ -535,3 +535,81 @@ int libxl_strtomac(const char *mac_s, uint8_t *mac)
}
return 0;
}
+
+#define QEMU_VERSION_STR "QEMU emulator version "
+
+
+int libxl_check_device_model_version(libxl_ctx *ctx, char *path)
+{
+ pid_t pid = -1;
+ int pipefd[2];
+ char buf[100];
+ ssize_t i, count = 0;
+ int status;
+ char *abs_path = NULL;
+
+ abs_path = libxl_abs_path(ctx, path, libxl_private_bindir_path());
+
+ if (pipe(pipefd))
+ return -1;
+
+ pid = fork();
+ if (pid == -1) {
+ return -1;
+ }
+
+ if (!pid) {
+ close(pipefd[0]);
+ if (dup2(pipefd[1], STDOUT_FILENO) == -1)
+ exit(1);
+ execlp(abs_path, abs_path, "-h", NULL);
+
+ close(pipefd[1]);
+ exit(127);
+ }
+
+ close(pipefd[1]);
+ if (abs_path != path)
+ libxl_free(ctx, abs_path);
+
+ /* attempt to get the first line of `qemu -h` */
+ while ((i = read(pipefd[0], buf + count, 99 - count)) > 0) {
+ if (i + count > 90)
+ break;
+ for (int j = 0; j < i; j++) {
+ if (buf[j + count] == '\n')
+ break;
+ }
+ count += i;
+ }
+ count += i;
+ close(pipefd[0]);
+ waitpid(pid, &status, 0);
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ return -1;
+ }
+
+ /* Check if we have the forked qemu-xen. */
+ /* QEMU-DM emulator version 0.10.2, ... */
+ if (strncmp("QEMU-DM ", buf, 7) == 0) {
+ return 0;
+ }
+
+ /* Check if the version is above 12.0 */
+ /* The first line is : QEMU emulator version 0.12.50, ... */
+ if (strncmp(QEMU_VERSION_STR, buf, strlen(QEMU_VERSION_STR)) == 0) {
+ int major, minor;
+ char *endptr = NULL;
+ char *v = buf + strlen(QEMU_VERSION_STR);
+
+ major = strtol(v, &endptr, 10);
+ if (major == 0 && endptr && *endptr == '.') {
+ v = endptr + 1;
+ minor = strtol(v, &endptr, 10);
+ if (minor >= 12)
+ return 1;
+ }
+ }
+
+ return -1;
+}
diff --git a/tools/libxl/libxl_utils.h b/tools/libxl/libxl_utils.h
index 98a912c..5de2137 100644
--- a/tools/libxl/libxl_utils.h
+++ b/tools/libxl/libxl_utils.h
@@ -68,5 +68,11 @@ int libxl_strtomac(const char *mac_s, uint8_t *mac);
int libxl_devid_to_device_net2(libxl_ctx *ctx, uint32_t domid,
const char *devid, libxl_device_net2 *net2);
+/* check the version of qemu
+ * return 1 if is the new one
+ * return 0 if is the old one
+ * return -1 if there are an error */
+int libxl_check_device_model_version(libxl_ctx *ctx, char *path);
+
#endif
--
1.6.5
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