The all key is /libxl/$domid/dm-version.
The /libxl/$domid dir is created with the domain and should be only accessible
by the toolstack domain.
This come with libxl__device_model_version_running helper function.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
tools/libxl/libxl.c | 2 ++
tools/libxl/libxl_create.c | 28 ++++++++++++++++++++++++++++
tools/libxl/libxl_internal.c | 19 +++++++++++++++++++
tools/libxl/libxl_internal.h | 5 +++++
4 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 064fbc4..50b97c2 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -777,6 +777,8 @@ int libxl_domain_destroy(libxl_ctx *ctx, uint32_t domid,
int force)
if (!xs_rm(ctx->xsh, XBT_NULL, dom_path))
LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "xs_rm failed for %s",
dom_path);
+ xs_rm(ctx->xsh, XBT_NULL, libxl__sprintf(&gc, "/libxl/%d", domid));
+
libxl__userdata_destroyall(&gc, domid);
rc = xc_domain_destroy(ctx->xch, domid);
diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 68d0fc3..bed991c 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -322,6 +322,9 @@ int libxl__domain_make(libxl__gc *gc,
libxl_domain_create_info *info,
xs_transaction_t t = 0;
xen_domain_handle_t handle;
+ struct xs_permissions libxlperm[1];
+ char *libxl_path = NULL;
+
assert(!libxl_domid_valid_guest(*domid));
uuid_string = libxl__uuid2string(gc, info->uuid);
@@ -368,6 +371,15 @@ int libxl__domain_make(libxl__gc *gc,
libxl_domain_create_info *info,
goto out;
}
+ libxl_path = libxl__sprintf(gc, "/libxl/%i", *domid);
+ if (!libxl_path) {
+ LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "cannot allocate create paths");
+ rc = ERROR_FAIL;
+ goto out;
+ }
+ libxlperm[0].id = 0;
+ libxlperm[0].perms = XS_PERM_NONE;
+
roperm[0].id = 0;
roperm[0].perms = XS_PERM_NONE;
roperm[1].id = *domid;
@@ -386,6 +398,10 @@ retry_transaction:
xs_mkdir(ctx->xsh, t, vm_path);
xs_set_permissions(ctx->xsh, t, vm_path, roperm, ARRAY_SIZE(roperm));
+ xs_rm(ctx->xsh, t, libxl_path);
+ xs_mkdir(ctx->xsh, t, libxl_path);
+ xs_set_permissions(ctx->xsh, t, libxl_path, libxlperm,
ARRAY_SIZE(libxlperm));
+
xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/vm", dom_path), vm_path,
strlen(vm_path));
rc = libxl__domain_rename(gc, *domid, 0, info->name, t);
if (rc)
@@ -429,6 +445,16 @@ retry_transaction:
return rc;
}
+static int store_libxl_entry(libxl__gc *gc, uint32_t domid,
+ libxl_device_model_info *dm_info)
+{
+ char *path = NULL;
+
+ path = libxl__sprintf(gc, "/libxl/%i/dm-version", domid);
+ return libxl__xs_write(gc, XBT_NULL, path, libxl__strdup(gc,
+ libxl_device_model_version_to_string(dm_info->device_model_version)));
+}
+
static int do_domain_create(libxl__gc *gc, libxl_domain_config *d_config,
libxl_console_ready cb, void *priv,
uint32_t *domid_out, int restore_fd)
@@ -485,6 +511,8 @@ static int do_domain_create(libxl__gc *gc,
libxl_domain_config *d_config,
goto error_out;
}
+ store_libxl_entry(gc, domid, dm_info);
+
for (i = 0; i < d_config->num_disks; i++) {
ret = libxl_device_disk_add(ctx, domid, &d_config->disks[i]);
if (ret) {
diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index 3993d8e..5d0a2d4 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -319,6 +319,25 @@ int libxl__fd_set_cloexec(int fd)
return fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
}
+libxl_device_model_version libxl__device_model_version_running(libxl__gc *gc,
+ uint32_t domid)
+{
+ char *path = NULL;
+ char *dm_version = NULL;
+ libxl_device_model_version value;
+
+ path = libxl__sprintf(gc, "/libxl/%d/dm-version", domid);
+ dm_version = libxl__xs_read(gc, XBT_NULL, path);
+ if (!dm_version) {
+ return LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
+ }
+
+ if (libxl_device_model_version_from_string(dm_version, &value) < 0) {
+ return LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
+ }
+ return value;
+}
+
/*
* Local variables:
* mode: C
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 2e26ac6..5720b31 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -554,6 +554,11 @@ _hidden void libxl__json_object_free(libxl__gc *gc,
libxl__json_object *obj);
_hidden libxl__json_object *libxl__json_parse(libxl__gc *gc, const char *s);
+ /* Based on /local/domain/$domid/dm-version xenstore key
+ * default is qemu xen traditional */
+_hidden libxl_device_model_version
+libxl__device_model_version_running(libxl__gc *gc, uint32_t domid);
+
#endif
/*
--
Anthony PERARD
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