The device model is going to restrict its xenstore connection to $DOMID
level. Let it access /local/domain/0/device-model/$DOMID, as it is
required by QEMU to read/write the physmap. It doesn't contain any
information the guest is not already fully aware of.
Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
---
Changes in v2:
- fix permissions to actually do what intended
- use LIBXL_TOOLSTACK_DOMID instead of 0
---
tools/libxl/libxl_dm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 79a9a22..f4f104f 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -1461,6 +1461,7 @@ void libxl__spawn_local_dm(libxl__egc *egc,
libxl__dm_spawn_state *dmss)
char **pass_stuff;
const char *dm;
int dm_state_fd = -1;
+ struct xs_permissions rwperm[2];
if (libxl_defbool_val(b_info->device_model_stubdomain)) {
abort();
@@ -1503,7 +1504,11 @@ void libxl__spawn_local_dm(libxl__egc *egc,
libxl__dm_spawn_state *dmss)
}
path = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID, domid, "");
- xs_mkdir(ctx->xsh, XBT_NULL, path);
+ rwperm[0].id = LIBXL_TOOLSTACK_DOMID;
+ rwperm[0].perms = XS_PERM_NONE;
+ rwperm[1].id = domid;
+ rwperm[1].perms = XS_PERM_WRITE;
+ libxl__xs_mkdir(gc, XBT_NULL, path, rwperm, 2);
if (b_info->type == LIBXL_DOMAIN_TYPE_HVM &&
b_info->device_model_version
--
1.7.10.4
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