Merge branch 'xen-netback-fix-multiple-extra-info-handling'
Paul Durrant says: ==================== xen-netback: fix multiple extra info handling If a frontend passes multiple extra info fragments to netback on the guest transmit side, because xen-netback does not account for this properly, only a single ack response will be sent. This will eventually cause processing of the shared ring to wedge. This series re-imports the canonical netif.h from Xen, where the ring protocol documentation has been updated, fixes this issue in xen-netback and also adds a patch to reduce log spam. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
commit
3c4ef85155
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@ -52,6 +52,7 @@ typedef unsigned int pending_ring_idx_t;
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struct pending_tx_info {
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struct xen_netif_tx_request req; /* tx request */
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unsigned int extra_count;
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/* Callback data for released SKBs. The callback is always
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* xenvif_zerocopy_callback, desc contains the pending_idx, which is
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* also an index in pending_tx_info array. It is initialized in
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@ -95,6 +95,7 @@ static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
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static void make_tx_response(struct xenvif_queue *queue,
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struct xen_netif_tx_request *txp,
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unsigned int extra_count,
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s8 st);
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static void push_tx_responses(struct xenvif_queue *queue);
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@ -696,14 +697,15 @@ void xenvif_tx_credit_callback(unsigned long data)
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}
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static void xenvif_tx_err(struct xenvif_queue *queue,
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struct xen_netif_tx_request *txp, RING_IDX end)
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struct xen_netif_tx_request *txp,
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unsigned int extra_count, RING_IDX end)
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{
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RING_IDX cons = queue->tx.req_cons;
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unsigned long flags;
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do {
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spin_lock_irqsave(&queue->response_lock, flags);
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make_tx_response(queue, txp, XEN_NETIF_RSP_ERROR);
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make_tx_response(queue, txp, extra_count, XEN_NETIF_RSP_ERROR);
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push_tx_responses(queue);
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spin_unlock_irqrestore(&queue->response_lock, flags);
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if (cons == end)
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@ -724,6 +726,7 @@ static void xenvif_fatal_tx_err(struct xenvif *vif)
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static int xenvif_count_requests(struct xenvif_queue *queue,
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struct xen_netif_tx_request *first,
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unsigned int extra_count,
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struct xen_netif_tx_request *txp,
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int work_to_do)
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{
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@ -812,7 +815,7 @@ static int xenvif_count_requests(struct xenvif_queue *queue,
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} while (more_data);
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if (drop_err) {
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xenvif_tx_err(queue, first, cons + slots);
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xenvif_tx_err(queue, first, extra_count, cons + slots);
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return drop_err;
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}
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@ -827,9 +830,10 @@ struct xenvif_tx_cb {
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#define XENVIF_TX_CB(skb) ((struct xenvif_tx_cb *)(skb)->cb)
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static inline void xenvif_tx_create_map_op(struct xenvif_queue *queue,
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u16 pending_idx,
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struct xen_netif_tx_request *txp,
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struct gnttab_map_grant_ref *mop)
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u16 pending_idx,
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struct xen_netif_tx_request *txp,
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unsigned int extra_count,
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struct gnttab_map_grant_ref *mop)
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{
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queue->pages_to_map[mop-queue->tx_map_ops] = queue->mmap_pages[pending_idx];
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gnttab_set_map_op(mop, idx_to_kaddr(queue, pending_idx),
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@ -838,6 +842,7 @@ static inline void xenvif_tx_create_map_op(struct xenvif_queue *queue,
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memcpy(&queue->pending_tx_info[pending_idx].req, txp,
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sizeof(*txp));
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queue->pending_tx_info[pending_idx].extra_count = extra_count;
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}
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static inline struct sk_buff *xenvif_alloc_skb(unsigned int size)
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@ -880,7 +885,7 @@ static struct gnttab_map_grant_ref *xenvif_get_requests(struct xenvif_queue *que
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shinfo->nr_frags++, txp++, gop++) {
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index = pending_index(queue->pending_cons++);
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pending_idx = queue->pending_ring[index];
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xenvif_tx_create_map_op(queue, pending_idx, txp, gop);
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xenvif_tx_create_map_op(queue, pending_idx, txp, 0, gop);
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frag_set_pending_idx(&frags[shinfo->nr_frags], pending_idx);
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}
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@ -893,7 +898,8 @@ static struct gnttab_map_grant_ref *xenvif_get_requests(struct xenvif_queue *que
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shinfo->nr_frags++, txp++, gop++) {
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index = pending_index(queue->pending_cons++);
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pending_idx = queue->pending_ring[index];
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xenvif_tx_create_map_op(queue, pending_idx, txp, gop);
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xenvif_tx_create_map_op(queue, pending_idx, txp, 0,
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gop);
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frag_set_pending_idx(&frags[shinfo->nr_frags],
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pending_idx);
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}
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@ -1095,8 +1101,9 @@ static void xenvif_fill_frags(struct xenvif_queue *queue, struct sk_buff *skb)
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}
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static int xenvif_get_extras(struct xenvif_queue *queue,
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struct xen_netif_extra_info *extras,
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int work_to_do)
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struct xen_netif_extra_info *extras,
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unsigned int *extra_count,
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int work_to_do)
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{
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struct xen_netif_extra_info extra;
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RING_IDX cons = queue->tx.req_cons;
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@ -1109,9 +1116,12 @@ static int xenvif_get_extras(struct xenvif_queue *queue,
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}
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RING_COPY_REQUEST(&queue->tx, cons, &extra);
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queue->tx.req_cons = ++cons;
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(*extra_count)++;
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if (unlikely(!extra.type ||
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extra.type >= XEN_NETIF_EXTRA_TYPE_MAX)) {
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queue->tx.req_cons = ++cons;
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netdev_err(queue->vif->dev,
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"Invalid extra type: %d\n", extra.type);
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xenvif_fatal_tx_err(queue->vif);
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@ -1119,7 +1129,6 @@ static int xenvif_get_extras(struct xenvif_queue *queue,
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}
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memcpy(&extras[extra.type - 1], &extra, sizeof(extra));
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queue->tx.req_cons = ++cons;
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} while (extra.flags & XEN_NETIF_EXTRA_FLAG_MORE);
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return work_to_do;
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@ -1294,6 +1303,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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struct xen_netif_tx_request txreq;
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struct xen_netif_tx_request txfrags[XEN_NETBK_LEGACY_SLOTS_MAX];
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struct xen_netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX-1];
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unsigned int extra_count;
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u16 pending_idx;
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RING_IDX idx;
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int work_to_do;
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@ -1330,8 +1340,10 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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queue->tx.req_cons = ++idx;
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memset(extras, 0, sizeof(extras));
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extra_count = 0;
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if (txreq.flags & XEN_NETTXF_extra_info) {
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work_to_do = xenvif_get_extras(queue, extras,
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&extra_count,
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work_to_do);
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idx = queue->tx.req_cons;
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if (unlikely(work_to_do < 0))
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@ -1344,7 +1356,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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extra = &extras[XEN_NETIF_EXTRA_TYPE_MCAST_ADD - 1];
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ret = xenvif_mcast_add(queue->vif, extra->u.mcast.addr);
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make_tx_response(queue, &txreq,
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make_tx_response(queue, &txreq, extra_count,
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(ret == 0) ?
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XEN_NETIF_RSP_OKAY :
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XEN_NETIF_RSP_ERROR);
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@ -1358,12 +1370,14 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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extra = &extras[XEN_NETIF_EXTRA_TYPE_MCAST_DEL - 1];
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xenvif_mcast_del(queue->vif, extra->u.mcast.addr);
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make_tx_response(queue, &txreq, XEN_NETIF_RSP_OKAY);
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make_tx_response(queue, &txreq, extra_count,
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XEN_NETIF_RSP_OKAY);
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push_tx_responses(queue);
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continue;
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}
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ret = xenvif_count_requests(queue, &txreq, txfrags, work_to_do);
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ret = xenvif_count_requests(queue, &txreq, extra_count,
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txfrags, work_to_do);
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if (unlikely(ret < 0))
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break;
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@ -1372,7 +1386,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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if (unlikely(txreq.size < ETH_HLEN)) {
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netdev_dbg(queue->vif->dev,
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"Bad packet size: %d\n", txreq.size);
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xenvif_tx_err(queue, &txreq, idx);
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xenvif_tx_err(queue, &txreq, extra_count, idx);
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break;
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}
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@ -1397,7 +1411,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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if (unlikely(skb == NULL)) {
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netdev_dbg(queue->vif->dev,
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"Can't allocate a skb in start_xmit.\n");
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xenvif_tx_err(queue, &txreq, idx);
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xenvif_tx_err(queue, &txreq, extra_count, idx);
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break;
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}
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@ -1416,7 +1430,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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nskb = xenvif_alloc_skb(0);
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if (unlikely(nskb == NULL)) {
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kfree_skb(skb);
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xenvif_tx_err(queue, &txreq, idx);
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xenvif_tx_err(queue, &txreq, extra_count, idx);
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if (net_ratelimit())
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netdev_err(queue->vif->dev,
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"Can't allocate the frag_list skb.\n");
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@ -1457,13 +1471,16 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
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if (data_len < txreq.size) {
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frag_set_pending_idx(&skb_shinfo(skb)->frags[0],
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pending_idx);
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xenvif_tx_create_map_op(queue, pending_idx, &txreq, gop);
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xenvif_tx_create_map_op(queue, pending_idx, &txreq,
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extra_count, gop);
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gop++;
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} else {
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frag_set_pending_idx(&skb_shinfo(skb)->frags[0],
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INVALID_PENDING_IDX);
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memcpy(&queue->pending_tx_info[pending_idx].req, &txreq,
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sizeof(txreq));
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memcpy(&queue->pending_tx_info[pending_idx].req,
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&txreq, sizeof(txreq));
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queue->pending_tx_info[pending_idx].extra_count =
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extra_count;
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}
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queue->pending_cons++;
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|
@ -1804,7 +1821,8 @@ static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
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spin_lock_irqsave(&queue->response_lock, flags);
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make_tx_response(queue, &pending_tx_info->req, status);
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make_tx_response(queue, &pending_tx_info->req,
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pending_tx_info->extra_count, status);
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/* Release the pending index before pusing the Tx response so
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* its available before a new Tx request is pushed by the
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|
@ -1821,6 +1839,7 @@ static void xenvif_idx_release(struct xenvif_queue *queue, u16 pending_idx,
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static void make_tx_response(struct xenvif_queue *queue,
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struct xen_netif_tx_request *txp,
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unsigned int extra_count,
|
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s8 st)
|
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{
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RING_IDX i = queue->tx.rsp_prod_pvt;
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|
@ -1830,7 +1849,7 @@ static void make_tx_response(struct xenvif_queue *queue,
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resp->id = txp->id;
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resp->status = st;
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if (txp->flags & XEN_NETTXF_extra_info)
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while (extra_count-- != 0)
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RING_GET_RESPONSE(&queue->tx, ++i)->status = XEN_NETIF_RSP_NULL;
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queue->tx.rsp_prod_pvt = ++i;
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|
|
|
@ -511,8 +511,6 @@ static void set_backend_state(struct backend_info *be,
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switch (state) {
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case XenbusStateInitWait:
|
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case XenbusStateConnected:
|
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pr_info("%s: prepare for reconnect\n",
|
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be->dev->nodename);
|
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backend_switch_state(be, XenbusStateInitWait);
|
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break;
|
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case XenbusStateClosing:
|
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|
|
|
@ -1,16 +1,34 @@
|
|||
/******************************************************************************
|
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* netif.h
|
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* xen_netif.h
|
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*
|
||||
* Unified network-device I/O interface for Xen guest OSes.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to
|
||||
* deal in the Software without restriction, including without limitation the
|
||||
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
||||
* sell copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
* DEALINGS IN THE SOFTWARE.
|
||||
*
|
||||
* Copyright (c) 2003-2004, Keir Fraser
|
||||
*/
|
||||
|
||||
#ifndef __XEN_PUBLIC_IO_NETIF_H__
|
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#define __XEN_PUBLIC_IO_NETIF_H__
|
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#ifndef __XEN_PUBLIC_IO_XEN_NETIF_H__
|
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#define __XEN_PUBLIC_IO_XEN_NETIF_H__
|
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|
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#include <xen/interface/io/ring.h>
|
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#include <xen/interface/grant_table.h>
|
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#include "ring.h"
|
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#include "../grant_table.h"
|
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|
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/*
|
||||
* Older implementation of Xen network frontend / backend has an
|
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|
@ -38,10 +56,10 @@
|
|||
* that it cannot safely queue packets (as it may not be kicked to send them).
|
||||
*/
|
||||
|
||||
/*
|
||||
/*
|
||||
* "feature-split-event-channels" is introduced to separate guest TX
|
||||
* and RX notificaion. Backend either doesn't support this feature or
|
||||
* advertise it via xenstore as 0 (disabled) or 1 (enabled).
|
||||
* and RX notification. Backend either doesn't support this feature or
|
||||
* advertises it via xenstore as 0 (disabled) or 1 (enabled).
|
||||
*
|
||||
* To make use of this feature, frontend should allocate two event
|
||||
* channels for TX and RX, advertise them to backend as
|
||||
|
@ -118,151 +136,804 @@
|
|||
*/
|
||||
|
||||
/*
|
||||
* This is the 'wire' format for packets:
|
||||
* Request 1: xen_netif_tx_request -- XEN_NETTXF_* (any flags)
|
||||
* [Request 2: xen_netif_extra_info] (only if request 1 has XEN_NETTXF_extra_info)
|
||||
* [Request 3: xen_netif_extra_info] (only if request 2 has XEN_NETIF_EXTRA_MORE)
|
||||
* Request 4: xen_netif_tx_request -- XEN_NETTXF_more_data
|
||||
* Request 5: xen_netif_tx_request -- XEN_NETTXF_more_data
|
||||
* "feature-multicast-control" and "feature-dynamic-multicast-control"
|
||||
* advertise the capability to filter ethernet multicast packets in the
|
||||
* backend. If the frontend wishes to take advantage of this feature then
|
||||
* it may set "request-multicast-control". If the backend only advertises
|
||||
* "feature-multicast-control" then "request-multicast-control" must be set
|
||||
* before the frontend moves into the connected state. The backend will
|
||||
* sample the value on this state transition and any subsequent change in
|
||||
* value will have no effect. However, if the backend also advertises
|
||||
* "feature-dynamic-multicast-control" then "request-multicast-control"
|
||||
* may be set by the frontend at any time. In this case, the backend will
|
||||
* watch the value and re-sample on watch events.
|
||||
*
|
||||
* If the sampled value of "request-multicast-control" is set then the
|
||||
* backend transmit side should no longer flood multicast packets to the
|
||||
* frontend, it should instead drop any multicast packet that does not
|
||||
* match in a filter list.
|
||||
* The list is amended by the frontend by sending dummy transmit requests
|
||||
* containing XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL} extra-info fragments as
|
||||
* specified below.
|
||||
* Note that the filter list may be amended even if the sampled value of
|
||||
* "request-multicast-control" is not set, however the filter should only
|
||||
* be applied if it is set.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Control ring
|
||||
* ============
|
||||
*
|
||||
* Some features, such as hashing (detailed below), require a
|
||||
* significant amount of out-of-band data to be passed from frontend to
|
||||
* backend. Use of xenstore is not suitable for large quantities of data
|
||||
* because of quota limitations and so a dedicated 'control ring' is used.
|
||||
* The ability of the backend to use a control ring is advertised by
|
||||
* setting:
|
||||
*
|
||||
* /local/domain/X/backend/<domid>/<vif>/feature-ctrl-ring = "1"
|
||||
*
|
||||
* The frontend provides a control ring to the backend by setting:
|
||||
*
|
||||
* /local/domain/<domid>/device/vif/<vif>/ctrl-ring-ref = <gref>
|
||||
* /local/domain/<domid>/device/vif/<vif>/event-channel-ctrl = <port>
|
||||
*
|
||||
* where <gref> is the grant reference of the shared page used to
|
||||
* implement the control ring and <port> is an event channel to be used
|
||||
* as a mailbox interrupt. These keys must be set before the frontend
|
||||
* moves into the connected state.
|
||||
*
|
||||
* The control ring uses a fixed request/response message size and is
|
||||
* balanced (i.e. one request to one response), so operationally it is much
|
||||
* the same as a transmit or receive ring.
|
||||
* Note that there is no requirement that responses are issued in the same
|
||||
* order as requests.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Hash types
|
||||
* ==========
|
||||
*
|
||||
* For the purposes of the definitions below, 'Packet[]' is an array of
|
||||
* octets containing an IP packet without options, 'Array[X..Y]' means a
|
||||
* sub-array of 'Array' containing bytes X thru Y inclusive, and '+' is
|
||||
* used to indicate concatenation of arrays.
|
||||
*/
|
||||
|
||||
/*
|
||||
* A hash calculated over an IP version 4 header as follows:
|
||||
*
|
||||
* Buffer[0..8] = Packet[12..15] (source address) +
|
||||
* Packet[16..19] (destination address)
|
||||
*
|
||||
* Result = Hash(Buffer, 8)
|
||||
*/
|
||||
#define _XEN_NETIF_CTRL_HASH_TYPE_IPV4 0
|
||||
#define XEN_NETIF_CTRL_HASH_TYPE_IPV4 \
|
||||
(1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV4)
|
||||
|
||||
/*
|
||||
* A hash calculated over an IP version 4 header and TCP header as
|
||||
* follows:
|
||||
*
|
||||
* Buffer[0..12] = Packet[12..15] (source address) +
|
||||
* Packet[16..19] (destination address) +
|
||||
* Packet[20..21] (source port) +
|
||||
* Packet[22..23] (destination port)
|
||||
*
|
||||
* Result = Hash(Buffer, 12)
|
||||
*/
|
||||
#define _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP 1
|
||||
#define XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP \
|
||||
(1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)
|
||||
|
||||
/*
|
||||
* A hash calculated over an IP version 6 header as follows:
|
||||
*
|
||||
* Buffer[0..32] = Packet[8..23] (source address ) +
|
||||
* Packet[24..39] (destination address)
|
||||
*
|
||||
* Result = Hash(Buffer, 32)
|
||||
*/
|
||||
#define _XEN_NETIF_CTRL_HASH_TYPE_IPV6 2
|
||||
#define XEN_NETIF_CTRL_HASH_TYPE_IPV6 \
|
||||
(1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV6)
|
||||
|
||||
/*
|
||||
* A hash calculated over an IP version 6 header and TCP header as
|
||||
* follows:
|
||||
*
|
||||
* Buffer[0..36] = Packet[8..23] (source address) +
|
||||
* Packet[24..39] (destination address) +
|
||||
* Packet[40..41] (source port) +
|
||||
* Packet[42..43] (destination port)
|
||||
*
|
||||
* Result = Hash(Buffer, 36)
|
||||
*/
|
||||
#define _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP 3
|
||||
#define XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP \
|
||||
(1 << _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)
|
||||
|
||||
/*
|
||||
* Hash algorithms
|
||||
* ===============
|
||||
*/
|
||||
|
||||
#define XEN_NETIF_CTRL_HASH_ALGORITHM_NONE 0
|
||||
|
||||
/*
|
||||
* Toeplitz hash:
|
||||
*/
|
||||
|
||||
#define XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ 1
|
||||
|
||||
/*
|
||||
* This algorithm uses a 'key' as well as the data buffer itself.
|
||||
* (Buffer[] and Key[] are treated as shift-registers where the MSB of
|
||||
* Buffer/Key[0] is considered 'left-most' and the LSB of Buffer/Key[N-1]
|
||||
* is the 'right-most').
|
||||
*
|
||||
* Value = 0
|
||||
* For number of bits in Buffer[]
|
||||
* If (left-most bit of Buffer[] is 1)
|
||||
* Value ^= left-most 32 bits of Key[]
|
||||
* Key[] << 1
|
||||
* Buffer[] << 1
|
||||
*
|
||||
* The code below is provided for convenience where an operating system
|
||||
* does not already provide an implementation.
|
||||
*/
|
||||
#ifdef XEN_NETIF_DEFINE_TOEPLITZ
|
||||
static uint32_t xen_netif_toeplitz_hash(const uint8_t *key,
|
||||
unsigned int keylen,
|
||||
const uint8_t *buf, unsigned int buflen)
|
||||
{
|
||||
unsigned int keyi, bufi;
|
||||
uint64_t prefix = 0;
|
||||
uint64_t hash = 0;
|
||||
|
||||
/* Pre-load prefix with the first 8 bytes of the key */
|
||||
for (keyi = 0; keyi < 8; keyi++) {
|
||||
prefix <<= 8;
|
||||
prefix |= (keyi < keylen) ? key[keyi] : 0;
|
||||
}
|
||||
|
||||
for (bufi = 0; bufi < buflen; bufi++) {
|
||||
uint8_t byte = buf[bufi];
|
||||
unsigned int bit;
|
||||
|
||||
for (bit = 0; bit < 8; bit++) {
|
||||
if (byte & 0x80)
|
||||
hash ^= prefix;
|
||||
prefix <<= 1;
|
||||
byte <<= 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* 'prefix' has now been left-shifted by 8, so
|
||||
* OR in the next byte.
|
||||
*/
|
||||
prefix |= (keyi < keylen) ? key[keyi] : 0;
|
||||
keyi++;
|
||||
}
|
||||
|
||||
/* The valid part of the hash is in the upper 32 bits. */
|
||||
return hash >> 32;
|
||||
}
|
||||
#endif /* XEN_NETIF_DEFINE_TOEPLITZ */
|
||||
|
||||
/*
|
||||
* Control requests (struct xen_netif_ctrl_request)
|
||||
* ================================================
|
||||
*
|
||||
* All requests have the following format:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | type | data[0] |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | data[1] | data[2] |
|
||||
* +-----+-----+-----+-----+-----------------------+
|
||||
*
|
||||
* id: the request identifier, echoed in response.
|
||||
* type: the type of request (see below)
|
||||
* data[]: any data associated with the request (determined by type)
|
||||
*/
|
||||
|
||||
struct xen_netif_ctrl_request {
|
||||
uint16_t id;
|
||||
uint16_t type;
|
||||
|
||||
#define XEN_NETIF_CTRL_TYPE_INVALID 0
|
||||
#define XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS 1
|
||||
#define XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS 2
|
||||
#define XEN_NETIF_CTRL_TYPE_SET_HASH_KEY 3
|
||||
#define XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE 4
|
||||
#define XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE 5
|
||||
#define XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING 6
|
||||
#define XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM 7
|
||||
|
||||
uint32_t data[3];
|
||||
};
|
||||
|
||||
/*
|
||||
* Control responses (struct xen_netif_ctrl_response)
|
||||
* ==================================================
|
||||
*
|
||||
* All responses have the following format:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | type | status |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | data |
|
||||
* +-----+-----+-----+-----+
|
||||
*
|
||||
* id: the corresponding request identifier
|
||||
* type: the type of the corresponding request
|
||||
* status: the status of request processing
|
||||
* data: any data associated with the response (determined by type and
|
||||
* status)
|
||||
*/
|
||||
|
||||
struct xen_netif_ctrl_response {
|
||||
uint16_t id;
|
||||
uint16_t type;
|
||||
uint32_t status;
|
||||
|
||||
#define XEN_NETIF_CTRL_STATUS_SUCCESS 0
|
||||
#define XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED 1
|
||||
#define XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER 2
|
||||
#define XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW 3
|
||||
|
||||
uint32_t data;
|
||||
};
|
||||
|
||||
/*
|
||||
* Control messages
|
||||
* ================
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM
|
||||
* --------------------------------------
|
||||
*
|
||||
* This is sent by the frontend to set the desired hash algorithm.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_SET_HASH_ALGORITHM
|
||||
* data[0] = a XEN_NETIF_CTRL_HASH_ALGORITHM_* value
|
||||
* data[1] = 0
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - The algorithm is not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
*
|
||||
* NOTE: Setting data[0] to XEN_NETIF_CTRL_HASH_ALGORITHM_NONE disables
|
||||
* hashing and the backend is free to choose how it steers packets
|
||||
* to queues (which is the default behaviour).
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS
|
||||
* ----------------------------------
|
||||
*
|
||||
* This is sent by the frontend to query the types of hash supported by
|
||||
* the backend.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_GET_HASH_FLAGS
|
||||
* data[0] = 0
|
||||
* data[1] = 0
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not supported
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = supported hash types (if operation was successful)
|
||||
*
|
||||
* NOTE: A valid hash algorithm must be selected before this operation can
|
||||
* succeed.
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS
|
||||
* ----------------------------------
|
||||
*
|
||||
* This is sent by the frontend to set the types of hash that the backend
|
||||
* should calculate. (See above for hash type definitions).
|
||||
* Note that the 'maximal' type of hash should always be chosen. For
|
||||
* example, if the frontend sets both IPV4 and IPV4_TCP hash types then
|
||||
* the latter hash type should be calculated for any TCP packet and the
|
||||
* former only calculated for non-TCP packets.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_SET_HASH_FLAGS
|
||||
* data[0] = bitwise OR of XEN_NETIF_CTRL_HASH_TYPE_* values
|
||||
* data[1] = 0
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - One or more flag
|
||||
* value is invalid or
|
||||
* unsupported
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = 0
|
||||
*
|
||||
* NOTE: A valid hash algorithm must be selected before this operation can
|
||||
* succeed.
|
||||
* Also, setting data[0] to zero disables hashing and the backend
|
||||
* is free to choose how it steers packets to queues.
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_SET_HASH_KEY
|
||||
* --------------------------------
|
||||
*
|
||||
* This is sent by the frontend to set the key of the hash if the algorithm
|
||||
* requires it. (See hash algorithms above).
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_SET_HASH_KEY
|
||||
* data[0] = grant reference of page containing the key (assumed to
|
||||
* start at beginning of grant)
|
||||
* data[1] = size of key in octets
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Key size is invalid
|
||||
* XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW - Key size is larger
|
||||
* than the backend
|
||||
* supports
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = 0
|
||||
*
|
||||
* NOTE: Any key octets not specified are assumed to be zero (the key
|
||||
* is assumed to be empty by default) and specifying a new key
|
||||
* invalidates any previous key, hence specifying a key size of
|
||||
* zero will clear the key (which ensures that the calculated hash
|
||||
* will always be zero).
|
||||
* The maximum size of key is algorithm and backend specific, but
|
||||
* is also limited by the single grant reference.
|
||||
* The grant reference may be read-only and must remain valid until
|
||||
* the response has been processed.
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE
|
||||
* -----------------------------------------
|
||||
*
|
||||
* This is sent by the frontend to query the maximum size of mapping
|
||||
* table supported by the backend. The size is specified in terms of
|
||||
* table entries.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_GET_HASH_MAPPING_SIZE
|
||||
* data[0] = 0
|
||||
* data[1] = 0
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not supported
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = maximum number of entries allowed in the mapping table
|
||||
* (if operation was successful) or zero if a mapping table is
|
||||
* not supported (i.e. hash mapping is done only by modular
|
||||
* arithmetic).
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
|
||||
* -------------------------------------
|
||||
*
|
||||
* This is sent by the frontend to set the actual size of the mapping
|
||||
* table to be used by the backend. The size is specified in terms of
|
||||
* table entries.
|
||||
* Any previous table is invalidated by this message and any new table
|
||||
* is assumed to be zero filled.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
|
||||
* data[0] = number of entries in mapping table
|
||||
* data[1] = 0
|
||||
* data[2] = 0
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Table size is invalid
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = 0
|
||||
*
|
||||
* NOTE: Setting data[0] to 0 means that hash mapping should be done
|
||||
* using modular arithmetic.
|
||||
*
|
||||
* XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING
|
||||
* ------------------------------------
|
||||
*
|
||||
* This is sent by the frontend to set the content of the table mapping
|
||||
* hash value to queue number. The backend should calculate the hash from
|
||||
* the packet header, use it as an index into the table (modulo the size
|
||||
* of the table) and then steer the packet to the queue number found at
|
||||
* that index.
|
||||
*
|
||||
* Request:
|
||||
*
|
||||
* type = XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING
|
||||
* data[0] = grant reference of page containing the mapping (sub-)table
|
||||
* (assumed to start at beginning of grant)
|
||||
* data[1] = size of (sub-)table in entries
|
||||
* data[2] = offset, in entries, of sub-table within overall table
|
||||
*
|
||||
* Response:
|
||||
*
|
||||
* status = XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED - Operation not
|
||||
* supported
|
||||
* XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER - Table size or content
|
||||
* is invalid
|
||||
* XEN_NETIF_CTRL_STATUS_BUFFER_OVERFLOW - Table size is larger
|
||||
* than the backend
|
||||
* supports
|
||||
* XEN_NETIF_CTRL_STATUS_SUCCESS - Operation successful
|
||||
* data = 0
|
||||
*
|
||||
* NOTE: The overall table has the following format:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | mapping[0] | mapping[1] |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | . |
|
||||
* | . |
|
||||
* | . |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | mapping[N-2] | mapping[N-1] |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* where N is specified by a XEN_NETIF_CTRL_TYPE_SET_HASH_MAPPING_SIZE
|
||||
* message and each mapping must specifies a queue between 0 and
|
||||
* "multi-queue-num-queues" (see above).
|
||||
* The backend may support a mapping table larger than can be
|
||||
* mapped by a single grant reference. Thus sub-tables within a
|
||||
* larger table can be individually set by sending multiple messages
|
||||
* with differing offset values. Specifying a new sub-table does not
|
||||
* invalidate any table data outside that range.
|
||||
* The grant reference may be read-only and must remain valid until
|
||||
* the response has been processed.
|
||||
*/
|
||||
|
||||
DEFINE_RING_TYPES(xen_netif_ctrl,
|
||||
struct xen_netif_ctrl_request,
|
||||
struct xen_netif_ctrl_response);
|
||||
|
||||
/*
|
||||
* Guest transmit
|
||||
* ==============
|
||||
*
|
||||
* This is the 'wire' format for transmit (frontend -> backend) packets:
|
||||
*
|
||||
* Fragment 1: xen_netif_tx_request_t - flags = XEN_NETTXF_*
|
||||
* size = total packet size
|
||||
* [Extra 1: xen_netif_extra_info_t] - (only if fragment 1 flags include
|
||||
* XEN_NETTXF_extra_info)
|
||||
* ...
|
||||
* Request N: xen_netif_tx_request -- 0
|
||||
* [Extra N: xen_netif_extra_info_t] - (only if extra N-1 flags include
|
||||
* XEN_NETIF_EXTRA_MORE)
|
||||
* ...
|
||||
* Fragment N: xen_netif_tx_request_t - (only if fragment N-1 flags include
|
||||
* XEN_NETTXF_more_data - flags on preceding
|
||||
* extras are not relevant here)
|
||||
* flags = 0
|
||||
* size = fragment size
|
||||
*
|
||||
* NOTE:
|
||||
*
|
||||
* This format slightly is different from that used for receive
|
||||
* (backend -> frontend) packets. Specifically, in a multi-fragment
|
||||
* packet the actual size of fragment 1 can only be determined by
|
||||
* subtracting the sizes of fragments 2..N from the total packet size.
|
||||
*
|
||||
* Ring slot size is 12 octets, however not all request/response
|
||||
* structs use the full size.
|
||||
*
|
||||
* tx request data (xen_netif_tx_request_t)
|
||||
* ------------------------------------
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | grant ref | offset | flags |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | size |
|
||||
* +-----+-----+-----+-----+
|
||||
*
|
||||
* grant ref: Reference to buffer page.
|
||||
* offset: Offset within buffer page.
|
||||
* flags: XEN_NETTXF_*.
|
||||
* id: request identifier, echoed in response.
|
||||
* size: packet size in bytes.
|
||||
*
|
||||
* tx response (xen_netif_tx_response_t)
|
||||
* ---------------------------------
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | status | unused |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | unused |
|
||||
* +-----+-----+-----+-----+
|
||||
*
|
||||
* id: reflects id in transmit request
|
||||
* status: XEN_NETIF_RSP_*
|
||||
*
|
||||
* Guest receive
|
||||
* =============
|
||||
*
|
||||
* This is the 'wire' format for receive (backend -> frontend) packets:
|
||||
*
|
||||
* Fragment 1: xen_netif_rx_request_t - flags = XEN_NETRXF_*
|
||||
* size = fragment size
|
||||
* [Extra 1: xen_netif_extra_info_t] - (only if fragment 1 flags include
|
||||
* XEN_NETRXF_extra_info)
|
||||
* ...
|
||||
* [Extra N: xen_netif_extra_info_t] - (only if extra N-1 flags include
|
||||
* XEN_NETIF_EXTRA_MORE)
|
||||
* ...
|
||||
* Fragment N: xen_netif_rx_request_t - (only if fragment N-1 flags include
|
||||
* XEN_NETRXF_more_data - flags on preceding
|
||||
* extras are not relevant here)
|
||||
* flags = 0
|
||||
* size = fragment size
|
||||
*
|
||||
* NOTE:
|
||||
*
|
||||
* This format slightly is different from that used for transmit
|
||||
* (frontend -> backend) packets. Specifically, in a multi-fragment
|
||||
* packet the size of the packet can only be determined by summing the
|
||||
* sizes of fragments 1..N.
|
||||
*
|
||||
* Ring slot size is 8 octets.
|
||||
*
|
||||
* rx request (xen_netif_rx_request_t)
|
||||
* -------------------------------
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | pad | gref |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* id: request identifier, echoed in response.
|
||||
* gref: reference to incoming granted frame.
|
||||
*
|
||||
* rx response (xen_netif_rx_response_t)
|
||||
* ---------------------------------
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | id | offset | flags | status |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* id: reflects id in receive request
|
||||
* offset: offset in page of start of received packet
|
||||
* flags: XEN_NETRXF_*
|
||||
* status: -ve: XEN_NETIF_RSP_*; +ve: Rx'ed pkt size.
|
||||
*
|
||||
* NOTE: Historically, to support GSO on the frontend receive side, Linux
|
||||
* netfront does not make use of the rx response id (because, as
|
||||
* described below, extra info structures overlay the id field).
|
||||
* Instead it assumes that responses always appear in the same ring
|
||||
* slot as their corresponding request. Thus, to maintain
|
||||
* compatibility, backends must make sure this is the case.
|
||||
*
|
||||
* Extra Info
|
||||
* ==========
|
||||
*
|
||||
* Can be present if initial request or response has NET{T,R}XF_extra_info,
|
||||
* or previous extra request has XEN_NETIF_EXTRA_MORE.
|
||||
*
|
||||
* The struct therefore needs to fit into either a tx or rx slot and
|
||||
* is therefore limited to 8 octets.
|
||||
*
|
||||
* NOTE: Because extra info data overlays the usual request/response
|
||||
* structures, there is no id information in the opposite direction.
|
||||
* So, if an extra info overlays an rx response the frontend can
|
||||
* assume that it is in the same ring slot as the request that was
|
||||
* consumed to make the slot available, and the backend must ensure
|
||||
* this assumption is true.
|
||||
*
|
||||
* extra info (xen_netif_extra_info_t)
|
||||
* -------------------------------
|
||||
*
|
||||
* General format:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* |type |flags| type specific data |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* | padding for tx |
|
||||
* +-----+-----+-----+-----+
|
||||
*
|
||||
* type: XEN_NETIF_EXTRA_TYPE_*
|
||||
* flags: XEN_NETIF_EXTRA_FLAG_*
|
||||
* padding for tx: present only in the tx case due to 8 octet limit
|
||||
* from rx case. Not shown in type specific entries
|
||||
* below.
|
||||
*
|
||||
* XEN_NETIF_EXTRA_TYPE_GSO:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* |type |flags| size |type | pad | features |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* type: Must be XEN_NETIF_EXTRA_TYPE_GSO
|
||||
* flags: XEN_NETIF_EXTRA_FLAG_*
|
||||
* size: Maximum payload size of each segment. For example,
|
||||
* for TCP this is just the path MSS.
|
||||
* type: XEN_NETIF_GSO_TYPE_*: This determines the protocol of
|
||||
* the packet and any extra features required to segment the
|
||||
* packet properly.
|
||||
* features: EN_XEN_NETIF_GSO_FEAT_*: This specifies any extra GSO
|
||||
* features required to process this packet, such as ECN
|
||||
* support for TCPv4.
|
||||
*
|
||||
* XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}:
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* |type |flags| addr |
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* type: Must be XEN_NETIF_EXTRA_TYPE_MCAST_{ADD,DEL}
|
||||
* flags: XEN_NETIF_EXTRA_FLAG_*
|
||||
* addr: address to add/remove
|
||||
*
|
||||
* XEN_NETIF_EXTRA_TYPE_HASH:
|
||||
*
|
||||
* A backend that supports teoplitz hashing is assumed to accept
|
||||
* this type of extra info in transmit packets.
|
||||
* A frontend that enables hashing is assumed to accept
|
||||
* this type of extra info in receive packets.
|
||||
*
|
||||
* 0 1 2 3 4 5 6 7 octet
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
* |type |flags|htype| alg |LSB ---- value ---- MSB|
|
||||
* +-----+-----+-----+-----+-----+-----+-----+-----+
|
||||
*
|
||||
* type: Must be XEN_NETIF_EXTRA_TYPE_HASH
|
||||
* flags: XEN_NETIF_EXTRA_FLAG_*
|
||||
* htype: Hash type (one of _XEN_NETIF_CTRL_HASH_TYPE_* - see above)
|
||||
* alg: The algorithm used to calculate the hash (one of
|
||||
* XEN_NETIF_CTRL_HASH_TYPE_ALGORITHM_* - see above)
|
||||
* value: Hash value
|
||||
*/
|
||||
|
||||
/* Protocol checksum field is blank in the packet (hardware offload)? */
|
||||
#define _XEN_NETTXF_csum_blank (0)
|
||||
#define XEN_NETTXF_csum_blank (1U<<_XEN_NETTXF_csum_blank)
|
||||
#define _XEN_NETTXF_csum_blank (0)
|
||||
#define XEN_NETTXF_csum_blank (1U<<_XEN_NETTXF_csum_blank)
|
||||
|
||||
/* Packet data has been validated against protocol checksum. */
|
||||
#define _XEN_NETTXF_data_validated (1)
|
||||
#define XEN_NETTXF_data_validated (1U<<_XEN_NETTXF_data_validated)
|
||||
#define _XEN_NETTXF_data_validated (1)
|
||||
#define XEN_NETTXF_data_validated (1U<<_XEN_NETTXF_data_validated)
|
||||
|
||||
/* Packet continues in the next request descriptor. */
|
||||
#define _XEN_NETTXF_more_data (2)
|
||||
#define XEN_NETTXF_more_data (1U<<_XEN_NETTXF_more_data)
|
||||
#define _XEN_NETTXF_more_data (2)
|
||||
#define XEN_NETTXF_more_data (1U<<_XEN_NETTXF_more_data)
|
||||
|
||||
/* Packet to be followed by extra descriptor(s). */
|
||||
#define _XEN_NETTXF_extra_info (3)
|
||||
#define XEN_NETTXF_extra_info (1U<<_XEN_NETTXF_extra_info)
|
||||
#define _XEN_NETTXF_extra_info (3)
|
||||
#define XEN_NETTXF_extra_info (1U<<_XEN_NETTXF_extra_info)
|
||||
|
||||
#define XEN_NETIF_MAX_TX_SIZE 0xFFFF
|
||||
struct xen_netif_tx_request {
|
||||
grant_ref_t gref; /* Reference to buffer page */
|
||||
uint16_t offset; /* Offset within buffer page */
|
||||
uint16_t flags; /* XEN_NETTXF_* */
|
||||
uint16_t id; /* Echoed in response message. */
|
||||
uint16_t size; /* Packet size in bytes. */
|
||||
grant_ref_t gref;
|
||||
uint16_t offset;
|
||||
uint16_t flags;
|
||||
uint16_t id;
|
||||
uint16_t size;
|
||||
};
|
||||
|
||||
/* 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_MCAST_ADD (2) /* u.mcast */
|
||||
#define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */
|
||||
#define XEN_NETIF_EXTRA_TYPE_MAX (4)
|
||||
#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */
|
||||
#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */
|
||||
#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_HASH (4) /* u.hash */
|
||||
#define XEN_NETIF_EXTRA_TYPE_MAX (5)
|
||||
|
||||
/* xen_netif_extra_info flags. */
|
||||
#define _XEN_NETIF_EXTRA_FLAG_MORE (0)
|
||||
#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
|
||||
/* xen_netif_extra_info_t flags. */
|
||||
#define _XEN_NETIF_EXTRA_FLAG_MORE (0)
|
||||
#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
|
||||
|
||||
/* GSO types */
|
||||
#define XEN_NETIF_GSO_TYPE_NONE (0)
|
||||
#define XEN_NETIF_GSO_TYPE_TCPV4 (1)
|
||||
#define XEN_NETIF_GSO_TYPE_TCPV6 (2)
|
||||
#define XEN_NETIF_GSO_TYPE_NONE (0)
|
||||
#define XEN_NETIF_GSO_TYPE_TCPV4 (1)
|
||||
#define XEN_NETIF_GSO_TYPE_TCPV6 (2)
|
||||
|
||||
/*
|
||||
* This structure needs to fit within both netif_tx_request and
|
||||
* netif_rx_response for compatibility.
|
||||
* This structure needs to fit within both xen_netif_tx_request_t and
|
||||
* xen_netif_rx_response_t for compatibility.
|
||||
*/
|
||||
struct xen_netif_extra_info {
|
||||
uint8_t type; /* XEN_NETIF_EXTRA_TYPE_* */
|
||||
uint8_t flags; /* XEN_NETIF_EXTRA_FLAG_* */
|
||||
|
||||
uint8_t type;
|
||||
uint8_t flags;
|
||||
union {
|
||||
struct {
|
||||
/*
|
||||
* Maximum payload size of each segment. For
|
||||
* example, for TCP this is just the path MSS.
|
||||
*/
|
||||
uint16_t size;
|
||||
|
||||
/*
|
||||
* GSO type. This determines the protocol of
|
||||
* the packet and any extra features required
|
||||
* to segment the packet properly.
|
||||
*/
|
||||
uint8_t type; /* XEN_NETIF_GSO_TYPE_* */
|
||||
|
||||
/* Future expansion. */
|
||||
uint8_t type;
|
||||
uint8_t pad;
|
||||
|
||||
/*
|
||||
* GSO features. This specifies any extra GSO
|
||||
* features required to process this packet,
|
||||
* such as ECN support for TCPv4.
|
||||
*/
|
||||
uint16_t features; /* XEN_NETIF_GSO_FEAT_* */
|
||||
uint16_t features;
|
||||
} gso;
|
||||
|
||||
struct {
|
||||
uint8_t addr[6]; /* Address to add/remove. */
|
||||
uint8_t addr[6];
|
||||
} mcast;
|
||||
|
||||
struct {
|
||||
uint8_t type;
|
||||
uint8_t algorithm;
|
||||
uint8_t value[4];
|
||||
} hash;
|
||||
uint16_t pad[3];
|
||||
} u;
|
||||
};
|
||||
|
||||
struct xen_netif_tx_response {
|
||||
uint16_t id;
|
||||
int16_t status; /* XEN_NETIF_RSP_* */
|
||||
int16_t status;
|
||||
};
|
||||
|
||||
struct xen_netif_rx_request {
|
||||
uint16_t id; /* Echoed in response message. */
|
||||
grant_ref_t gref; /* Reference to incoming granted frame */
|
||||
uint16_t id; /* Echoed in response message. */
|
||||
uint16_t pad;
|
||||
grant_ref_t gref;
|
||||
};
|
||||
|
||||
/* Packet data has been validated against protocol checksum. */
|
||||
#define _XEN_NETRXF_data_validated (0)
|
||||
#define XEN_NETRXF_data_validated (1U<<_XEN_NETRXF_data_validated)
|
||||
#define _XEN_NETRXF_data_validated (0)
|
||||
#define XEN_NETRXF_data_validated (1U<<_XEN_NETRXF_data_validated)
|
||||
|
||||
/* Protocol checksum field is blank in the packet (hardware offload)? */
|
||||
#define _XEN_NETRXF_csum_blank (1)
|
||||
#define XEN_NETRXF_csum_blank (1U<<_XEN_NETRXF_csum_blank)
|
||||
#define _XEN_NETRXF_csum_blank (1)
|
||||
#define XEN_NETRXF_csum_blank (1U<<_XEN_NETRXF_csum_blank)
|
||||
|
||||
/* Packet continues in the next request descriptor. */
|
||||
#define _XEN_NETRXF_more_data (2)
|
||||
#define XEN_NETRXF_more_data (1U<<_XEN_NETRXF_more_data)
|
||||
#define _XEN_NETRXF_more_data (2)
|
||||
#define XEN_NETRXF_more_data (1U<<_XEN_NETRXF_more_data)
|
||||
|
||||
/* Packet to be followed by extra descriptor(s). */
|
||||
#define _XEN_NETRXF_extra_info (3)
|
||||
#define XEN_NETRXF_extra_info (1U<<_XEN_NETRXF_extra_info)
|
||||
#define _XEN_NETRXF_extra_info (3)
|
||||
#define XEN_NETRXF_extra_info (1U<<_XEN_NETRXF_extra_info)
|
||||
|
||||
/* GSO Prefix descriptor. */
|
||||
#define _XEN_NETRXF_gso_prefix (4)
|
||||
#define XEN_NETRXF_gso_prefix (1U<<_XEN_NETRXF_gso_prefix)
|
||||
/* Packet has GSO prefix. Deprecated but included for compatibility */
|
||||
#define _XEN_NETRXF_gso_prefix (4)
|
||||
#define XEN_NETRXF_gso_prefix (1U<<_XEN_NETRXF_gso_prefix)
|
||||
|
||||
struct xen_netif_rx_response {
|
||||
uint16_t id;
|
||||
uint16_t offset; /* Offset in page of start of received packet */
|
||||
uint16_t flags; /* XEN_NETRXF_* */
|
||||
int16_t status; /* -ve: BLKIF_RSP_* ; +ve: Rx'ed pkt size. */
|
||||
uint16_t id;
|
||||
uint16_t offset;
|
||||
uint16_t flags;
|
||||
int16_t status;
|
||||
};
|
||||
|
||||
/*
|
||||
* Generate netif ring structures and types.
|
||||
* Generate xen_netif ring structures and types.
|
||||
*/
|
||||
|
||||
DEFINE_RING_TYPES(xen_netif_tx,
|
||||
struct xen_netif_tx_request,
|
||||
DEFINE_RING_TYPES(xen_netif_tx, struct xen_netif_tx_request,
|
||||
struct xen_netif_tx_response);
|
||||
DEFINE_RING_TYPES(xen_netif_rx,
|
||||
struct xen_netif_rx_request,
|
||||
DEFINE_RING_TYPES(xen_netif_rx, struct xen_netif_rx_request,
|
||||
struct xen_netif_rx_response);
|
||||
|
||||
#define XEN_NETIF_RSP_DROPPED -2
|
||||
#define XEN_NETIF_RSP_ERROR -1
|
||||
#define XEN_NETIF_RSP_OKAY 0
|
||||
/* No response: used for auxiliary requests (e.g., xen_netif_extra_info). */
|
||||
#define XEN_NETIF_RSP_NULL 1
|
||||
#define XEN_NETIF_RSP_DROPPED -2
|
||||
#define XEN_NETIF_RSP_ERROR -1
|
||||
#define XEN_NETIF_RSP_OKAY 0
|
||||
/* No response: used for auxiliary requests (e.g., xen_netif_extra_info_t). */
|
||||
#define XEN_NETIF_RSP_NULL 1
|
||||
|
||||
#endif
|
||||
|
|
Loading…
Reference in New Issue