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-rw-r--r--include/linux/avf/virtchnl.h147
1 files changed, 147 insertions, 0 deletions
diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h
index 6c6fbb492b5d..dab76e947b9f 100644
--- a/include/linux/avf/virtchnl.h
+++ b/include/linux/avf/virtchnl.h
@@ -498,4 +498,151 @@ enum virtchnl_vfr_states {
VIRTCHNL_VFR_VFACTIVE,
};
+/**
+ * virtchnl_vc_validate_vf_msg
+ * @ver: Virtchnl version info
+ * @v_opcode: Opcode for the message
+ * @msg: pointer to the msg buffer
+ * @msglen: msg length
+ *
+ * validate msg format against struct for each opcode
+ */
+static inline int
+virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
+ u8 *msg, u16 msglen)
+{
+ bool err_msg_format = false;
+ int valid_len = 0;
+
+ /* Validate message length. */
+ switch (v_opcode) {
+ case VIRTCHNL_OP_VERSION:
+ valid_len = sizeof(struct virtchnl_version_info);
+ break;
+ case VIRTCHNL_OP_RESET_VF:
+ break;
+ case VIRTCHNL_OP_GET_VF_RESOURCES:
+ if (VF_IS_V11(ver))
+ valid_len = sizeof(u32);
+ break;
+ case VIRTCHNL_OP_CONFIG_TX_QUEUE:
+ valid_len = sizeof(struct virtchnl_txq_info);
+ break;
+ case VIRTCHNL_OP_CONFIG_RX_QUEUE:
+ valid_len = sizeof(struct virtchnl_rxq_info);
+ break;
+ case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
+ valid_len = sizeof(struct virtchnl_vsi_queue_config_info);
+ if (msglen >= valid_len) {
+ struct virtchnl_vsi_queue_config_info *vqc =
+ (struct virtchnl_vsi_queue_config_info *)msg;
+ valid_len += (vqc->num_queue_pairs *
+ sizeof(struct
+ virtchnl_queue_pair_info));
+ if (vqc->num_queue_pairs == 0)
+ err_msg_format = true;
+ }
+ break;
+ case VIRTCHNL_OP_CONFIG_IRQ_MAP:
+ valid_len = sizeof(struct virtchnl_irq_map_info);
+ if (msglen >= valid_len) {
+ struct virtchnl_irq_map_info *vimi =
+ (struct virtchnl_irq_map_info *)msg;
+ valid_len += (vimi->num_vectors *
+ sizeof(struct virtchnl_vector_map));
+ if (vimi->num_vectors == 0)
+ err_msg_format = true;
+ }
+ break;
+ case VIRTCHNL_OP_ENABLE_QUEUES:
+ case VIRTCHNL_OP_DISABLE_QUEUES:
+ valid_len = sizeof(struct virtchnl_queue_select);
+ break;
+ case VIRTCHNL_OP_ADD_ETH_ADDR:
+ case VIRTCHNL_OP_DEL_ETH_ADDR:
+ valid_len = sizeof(struct virtchnl_ether_addr_list);
+ if (msglen >= valid_len) {
+ struct virtchnl_ether_addr_list *veal =
+ (struct virtchnl_ether_addr_list *)msg;
+ valid_len += veal->num_elements *
+ sizeof(struct virtchnl_ether_addr);
+ if (veal->num_elements == 0)
+ err_msg_format = true;
+ }
+ break;
+ case VIRTCHNL_OP_ADD_VLAN:
+ case VIRTCHNL_OP_DEL_VLAN:
+ valid_len = sizeof(struct virtchnl_vlan_filter_list);
+ if (msglen >= valid_len) {
+ struct virtchnl_vlan_filter_list *vfl =
+ (struct virtchnl_vlan_filter_list *)msg;
+ valid_len += vfl->num_elements * sizeof(u16);
+ if (vfl->num_elements == 0)
+ err_msg_format = true;
+ }
+ break;
+ case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
+ valid_len = sizeof(struct virtchnl_promisc_info);
+ break;
+ case VIRTCHNL_OP_GET_STATS:
+ valid_len = sizeof(struct virtchnl_queue_select);
+ break;
+ case VIRTCHNL_OP_IWARP:
+ /* These messages are opaque to us and will be validated in
+ * the RDMA client code. We just need to check for nonzero
+ * length. The firmware will enforce max length restrictions.
+ */
+ if (msglen)
+ valid_len = msglen;
+ else
+ err_msg_format = true;
+ break;
+ case VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
+ break;
+ case VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP:
+ valid_len = sizeof(struct virtchnl_iwarp_qvlist_info);
+ if (msglen >= valid_len) {
+ struct virtchnl_iwarp_qvlist_info *qv =
+ (struct virtchnl_iwarp_qvlist_info *)msg;
+ if (qv->num_vectors == 0) {
+ err_msg_format = true;
+ break;
+ }
+ valid_len += ((qv->num_vectors - 1) *
+ sizeof(struct virtchnl_iwarp_qv_info));
+ }
+ break;
+ case VIRTCHNL_OP_CONFIG_RSS_KEY:
+ valid_len = sizeof(struct virtchnl_rss_key);
+ if (msglen >= valid_len) {
+ struct virtchnl_rss_key *vrk =
+ (struct virtchnl_rss_key *)msg;
+ valid_len += vrk->key_len - 1;
+ }
+ break;
+ case VIRTCHNL_OP_CONFIG_RSS_LUT:
+ valid_len = sizeof(struct virtchnl_rss_lut);
+ if (msglen >= valid_len) {
+ struct virtchnl_rss_lut *vrl =
+ (struct virtchnl_rss_lut *)msg;
+ valid_len += vrl->lut_entries - 1;
+ }
+ break;
+ case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
+ break;
+ case VIRTCHNL_OP_SET_RSS_HENA:
+ valid_len = sizeof(struct virtchnl_rss_hena);
+ break;
+ /* These are always errors coming from the VF. */
+ case VIRTCHNL_OP_EVENT:
+ case VIRTCHNL_OP_UNKNOWN:
+ default:
+ return VIRTCHNL_ERR_PARAM;
+ }
+ /* few more checks */
+ if ((valid_len != msglen) || (err_msg_format))
+ return VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH;
+
+ return 0;
+}
#endif /* _VIRTCHNL_H_ */