diff options
Diffstat (limited to 'kernel/include/xen/interface/io')
| -rw-r--r-- | kernel/include/xen/interface/io/netif.h | 8 | ||||
| -rw-r--r-- | kernel/include/xen/interface/io/ring.h | 14 |
2 files changed, 21 insertions, 1 deletions
diff --git a/kernel/include/xen/interface/io/netif.h b/kernel/include/xen/interface/io/netif.h index 70054cc07..252ffd480 100644 --- a/kernel/include/xen/interface/io/netif.h +++ b/kernel/include/xen/interface/io/netif.h @@ -156,7 +156,9 @@ struct xen_netif_tx_request { /* Types of xen_netif_extra_info descriptors. */ #define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */ #define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */ -#define XEN_NETIF_EXTRA_TYPE_MAX (2) +#define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */ +#define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */ +#define XEN_NETIF_EXTRA_TYPE_MAX (4) /* xen_netif_extra_info flags. */ #define _XEN_NETIF_EXTRA_FLAG_MORE (0) @@ -201,6 +203,10 @@ struct xen_netif_extra_info { uint16_t features; /* XEN_NETIF_GSO_FEAT_* */ } gso; + struct { + uint8_t addr[6]; /* Address to add/remove. */ + } mcast; + uint16_t pad[3]; } u; }; diff --git a/kernel/include/xen/interface/io/ring.h b/kernel/include/xen/interface/io/ring.h index 7d28aff60..7dc685b40 100644 --- a/kernel/include/xen/interface/io/ring.h +++ b/kernel/include/xen/interface/io/ring.h @@ -181,6 +181,20 @@ struct __name##_back_ring { \ #define RING_GET_REQUEST(_r, _idx) \ (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req)) +/* + * Get a local copy of a request. + * + * Use this in preference to RING_GET_REQUEST() so all processing is + * done on a local copy that cannot be modified by the other end. + * + * Note that https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145 may cause this + * to be ineffective where _req is a struct which consists of only bitfields. + */ +#define RING_COPY_REQUEST(_r, _idx, _req) do { \ + /* Use volatile to force the copy into _req. */ \ + *(_req) = *(volatile typeof(_req))RING_GET_REQUEST(_r, _idx); \ +} while (0) + #define RING_GET_RESPONSE(_r, _idx) \ (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp)) |