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path: root/src/vnet/qos/qos_store_node.c
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/*
 * Copyright (c) 2018 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/qos/qos_store.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip6_to_ip4.h>
#include <vnet/feature/feature.h>
#include <vnet/qos/qos_types.h>

extern u8 *qos_store_configs[QOS_N_SOURCES];

/**
 * per-packet trace data
 */
typedef struct qos_store_trace_t_
{
  /* per-pkt trace data */
  qos_bits_t bits;
} qos_store_trace_t;

/* packet trace format function */
static u8 *
format_qos_store_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  qos_store_trace_t *t = va_arg (*args, qos_store_trace_t *);

  s = format (s, "qos:%d", t->bits);

  return s;
}

static inline uword
qos_store_inline (vlib_main_t * vm,
		  vlib_node_runtime_t * node,
		  vlib_frame_t * frame, qos_source_t qos_src)
{
  u32 n_left_from, *from, *to_next, next_index;

  next_index = 0;
  n_left_from = frame->n_vectors;
  from = vlib_frame_vector_args (frame);

  while (n_left_from > 0)
    {
      u32 n_left_to_next;

      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  vlib_buffer_t *b0;
	  u32 next0, bi0;
	  qos_bits_t qos0;

	  next0 = 0;
	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);

	  qos0 =
	    *(qos_bits_t *) vnet_feature_next_with_data (&next0, b0,
							 sizeof (qos_bits_t));

	  vnet_buffer2 (b0)->qos.bits = qos0;
	  vnet_buffer2 (b0)->qos.source = qos_src;
	  b0->flags |= VNET_BUFFER_F_QOS_DATA_VALID;

	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
			     (b0->flags & VLIB_BUFFER_IS_TRACED)))
	    {
	      qos_store_trace_t *t =
		vlib_add_trace (vm, node, b0, sizeof (*t));
	      t->bits = qos0;
	    }


	  /* verify speculative enqueue, maybe switch current next frame */
	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
					   to_next, n_left_to_next,
					   bi0, next0);
	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  return frame->n_vectors;
}


VLIB_NODE_FN (ip4_qos_store_node) (vlib_main_t * vm,
				   vlib_node_runtime_t * node,
				   vlib_frame_t * frame)
{
  return (qos_store_inline (vm, node, frame, QOS_SOURCE_IP));
}

VLIB_NODE_FN (ip6_qos_store_node) (vlib_main_t * vm,
				   vlib_node_runtime_t * node,
				   vlib_frame_t * frame)
{
  return (qos_store_inline (vm, node, frame, QOS_SOURCE_IP));
}


/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip4_qos_store_node) = {
  .name = "ip4-qos-store",
  .vector_size = sizeof (u32),
  .format_trace = format_qos_store_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = 0,
  .n_next_nodes = 1,

  .next_nodes = {
    [0] = "ip4-drop",
  },
};

VNET_FEATURE_INIT (ip4_qos_store_node, static) = {
    .arc_name = "ip4-unicast",
    .node_name = "ip4-qos-store",
};
VNET_FEATURE_INIT (ip4m_qos_store_node, static) = {
    .arc_name = "ip4-multicast",
    .node_name = "ip4-qos-store",
};

VLIB_REGISTER_NODE (ip6_qos_store_node) = {
  .name = "ip6-qos-store",
  .vector_size = sizeof (u32),
  .format_trace = format_qos_store_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = 0,
  .n_next_nodes = 1,

  .next_nodes = {
    [0] = "ip6-drop",
  },
};

VNET_FEATURE_INIT (ip6_qos_store_node, static) = {
    .arc_name = "ip6-unicast",
    .node_name = "ip6-qos-store",
};
VNET_FEATURE_INIT (ip6m_qos_store_node, static) = {
    .arc_name = "ip6-multicast",
    .node_name = "ip6-qos-store",
};

/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
ripped. :type prefix: object :returns: Self, to enable method chaining. :rtype: OptionString """ self.prefix = str(prefix).strip() def extend(self, other): """Extend self by contents of other option string. :param other: Another instance to add to the end of self. :type other: OptionString :returns: Self, to enable method chaining. :rtype: OptionString """ self.parts.extend(other.parts) return self def check_and_add(self, part, prefixed): """Convert to string, strip, conditionally add prefixed if non-empty. Value of None is converted to empty string. Emptiness is tested before adding prefix. This could be a protected method (name starting with underscore), but then pylint does not understand add_equals and add_with_value are allowed to call this on the temp instance. TODO: Is there a way to make pylint understand? :param part: Unchecked part to add to list of parts. :param prefixed: Whether to add prefix when adding. :type part: object :type prefixed: object :returns: The converted part without prefix, empty means not added. :rtype: str """ part = u"" if part is None else str(part).strip() if part: prefixed_part = self.prefix + part if prefixed else part self.parts.append(prefixed_part) return part def add(self, parameter): """Add parameter if nonempty to the list of parts. Parameter object is converted to string and stripped. If parameter converts to empty string, nothing is added. Parameter is prefixed before adding. :param parameter: Parameter object, usually a word starting with dash. :type parameter: object :returns: Self, to enable method chaining. :rtype: OptionString """ self.check_and_add(parameter, prefixed=True) return self def add_if(self, parameter, condition): """Add parameter if nonempty and condition is true to the list of parts. If condition truth value is false, nothing is added. Parameter object is converted to string and stripped. If parameter converts to empty string, nothing is added. Parameter is prefixed before adding. :param parameter: Parameter object, usually a word starting with dash. :param condition: Do not add if truth value of this is false. :type parameter: object :type condition: object :returns: Self, to enable method chaining. :rtype: OptionString """ if condition: self.add(parameter) return self def add_with_value(self, parameter, value): """Add parameter, if followed by a value to the list of parts. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: Parameter object, usually a word starting with dash. :param value: Value object. Prefix is never added. :type parameter: object :type value: object :returns: Self, to enable method chaining. :rtype: OptionString """ temp = OptionString(prefix=self.prefix) if temp.check_and_add(parameter, prefixed=True): if temp.check_and_add(value, prefixed=False): self.extend(temp) return self def add_equals(self, parameter, value): """Add parameter=value to the list of parts. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: Parameter object, usually a word starting with dash. :param value: Value object. Prefix is never added. :type parameter: object :type value: object :returns: Self, to enable method chaining. :rtype: OptionString """ temp = OptionString(prefix=self.prefix) if temp.check_and_add(parameter, prefixed=True): if temp.check_and_add(value, prefixed=False): self.parts.append(u"=".join(temp.parts)) return self def add_with_value_if(self, parameter, value, condition): """Add parameter and value if condition is true and nothing is empty. If condition truth value is false, nothing is added. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: Parameter object, usually a word starting with dash. :param value: Value object. Prefix is never added. :param condition: Do not add if truth value of this is false. :type parameter: object :type value: object :type condition: object :returns: Self, to enable method chaining. :rtype: OptionString """ if condition: self.add_with_value(parameter, value) return self def add_equals_if(self, parameter, value, condition): """Add parameter=value to the list of parts if condition is true. If condition truth value is false, nothing is added. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: Parameter object, usually a word starting with dash. :param value: Value object. Prefix is never added. :param condition: Do not add if truth value of this is false. :type parameter: object :type value: object :type condition: object :returns: Self, to enable method chaining. :rtype: OptionString """ if condition: self.add_equals(parameter, value) return self def add_with_value_from_dict(self, parameter, key, mapping, default=u""): """Add parameter with value from dict under key, or default. If key is missing, default is used as value. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: The parameter part to add with prefix. :param key: The key to look the value for. :param mapping: Mapping with keys and values to use. :param default: The value to use if key is missing. :type parameter: object :type key: str :type mapping: dict :type default: object :returns: Self, to enable method chaining. :rtype: OptionString """ value = mapping.get(key, default) return self.add_with_value(parameter, value) def add_equals_from_dict(self, parameter, key, mapping, default=u""): """Add parameter=value to options where value is from dict. If key is missing, default is used as value. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: The parameter part to add with prefix. :param key: The key to look the value for. :param mapping: Mapping with keys and values to use. :param default: The value to use if key is missing. :type parameter: object :type key: str :type mapping: dict :type default: object :returns: Self, to enable method chaining. :rtype: OptionString """ value = mapping.get(key, default) return self.add_equals(parameter, value) def add_if_from_dict(self, parameter, key, mapping, default=u"False"): """Add parameter based on if the condition in dict is true. If key is missing, default is used as condition. If condition truth value is false, nothing is added. Parameter is converted to string and stripped. If parameter converts to empty string, nothing is added. Parameter is prefixed before adding. :param parameter: The parameter part to add with prefix. :param key: The key to look the value for. :param mapping: Mapping with keys and values to use. :param default: The value to use if key is missing. :type parameter: object :type key: str :type mapping: dict :type default: object :returns: Self, to enable method chaining. :rtype: OptionString """ condition = mapping.get(key, default) return self.add_if(parameter, condition) def add_with_value_if_from_dict( self, parameter, value, key, mapping, default=u"False"): """Add parameter and value based on condition in dict. If key is missing, default is used as condition. If condition truth value is false, nothing is added. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: The parameter part to add with prefix. :param value: Value object. Prefix is never added. :param key: The key to look the value for. :param mapping: Mapping with keys and values to use. :param default: The value to use if key is missing. :type parameter: object :type value: object :type key: str :type mapping: dict :type default: object :returns: Self, to enable method chaining. :rtype: OptionString """ condition = mapping.get(key, default) return self.add_with_value_if(parameter, value, condition) def add_equals_if_from_dict( self, parameter, value, key, mapping, default=u"False"): """Add parameter=value based on condition in dict. If key is missing, default is used as condition. If condition truth value is false, nothing is added. Parameter and value are converted to string and stripped. If parameter or value converts to empty string, nothing is added. If added, parameter (but not value) is prefixed. :param parameter: The parameter part to add with prefix. :param value: Value object. Prefix is never added. :param key: The key to look the value for. :param mapping: Mapping with keys and values to use. :param default: The value to use if key is missing. :type parameter: object :type value: object :type key: str :type mapping: dict :type default: object :returns: Self, to enable method chaining. :rtype: OptionString """ condition = mapping.get(key, default) return self.add_equals_if(parameter, value, condition) def __str__(self): """Return space separated string of nonempty parts. The format is suitable to be pasted as (part of) command line. Do not call str() prematurely just to get a substring, consider converting the surrounding text manipulation to OptionString as well. :returns: Space separated string of options. :rtype: str """ return u" ".join(self.parts)