[xen staging] tools/libs/light: Add vlan field to libxl_device_nic

[patchbot@xxxxxxx]

commit 3bc14e4fa4b9832888710759a7dbe5f0d239f33b
Author:     Leigh Brown <leigh@xxxxxxxxxxxxx>
AuthorDate: Wed May 8 22:38:20 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed May 15 19:59:52 2024 +0100

    tools/libs/light: Add vlan field to libxl_device_nic
    
    Add `vlan' string field to libxl_device_nic, to allow a VLAN
    configuration to be specified for the VIF when adding it to the
    bridge device.
    
    Update libxl_nic.c to read and write the vlan field from the
    xenstore.
    
    This provides the capability for supported operating systems (e.g.
    Linux) to perform VLAN filtering on bridge ports.  The Xen
    hotplug scripts need to be updated to read this information from
    the xenstore and perform the required configuration.
    
    Signed-off-by: Leigh Brown <leigh@xxxxxxxxxxxxx>
    Reviewed-by: Jason Andryuk <jandryuk@xxxxxxxxx>
---
 tools/libs/light/libxl_nic.c     | 10 ++++++++++
 tools/libs/light/libxl_types.idl |  1 +
 2 files changed, 11 insertions(+)

diff --git a/tools/libs/light/libxl_nic.c b/tools/libs/light/libxl_nic.c
index d6bf06fc34..d861e3726d 100644
--- a/tools/libs/light/libxl_nic.c
+++ b/tools/libs/light/libxl_nic.c
@@ -233,6 +233,11 @@ static int libxl__set_xenstore_nic(libxl__gc *gc, uint32_t 
domid,
         flexarray_append(back, GCSPRINTF("%u", nic->mtu));
     }
     
+    if (nic->vlan) {
+        flexarray_append(back, "vlan");
+        flexarray_append(back, libxl__strdup(gc, nic->vlan));
+    }
+
     flexarray_append(back, "bridge");
     flexarray_append(back, libxl__strdup(gc, nic->bridge));
     flexarray_append(back, "handle");
@@ -313,6 +318,11 @@ static int libxl__nic_from_xenstore(libxl__gc *gc, const 
char *libxl_path,
         nic->mtu = LIBXL_DEVICE_NIC_MTU_DEFAULT;
     }
 
+    rc = libxl__xs_read_checked(gc, XBT_NULL,
+                                GCSPRINTF("%s/vlan", libxl_path),
+                               (const char **)(&nic->vlan));
+    if (rc) goto out;
+
     rc = libxl__xs_read_checked(gc, XBT_NULL,
                                 GCSPRINTF("%s/mac", libxl_path), &tmp);
     if (rc) goto out;
diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl
index 470122e768..79e9c656cc 100644
--- a/tools/libs/light/libxl_types.idl
+++ b/tools/libs/light/libxl_types.idl
@@ -817,6 +817,7 @@ libxl_device_nic = Struct("device_nic", [
     ("backend_domname", string),
     ("devid", libxl_devid),
     ("mtu", integer),
+    ("vlan", string),
     ("model", string),
     ("mac", libxl_mac),
     ("ip", string),
--
generated by git-patchbot for /home/xen/git/xen.git#staging