summaryrefslogtreecommitdiffstats
path: root/src/vnet/srmpls
diff options
context:
space:
mode:
authorDamjan Marion <damarion@cisco.com>2021-04-14 18:48:22 +0200
committerDamjan Marion <damarion@cisco.com>2021-04-14 18:48:24 +0200
commitd22f1906e7f1800bcef072357bd8d7d20143f64b (patch)
tree40903499b1c0a1e56a0b1c21b02e8d31e447cd7a /src/vnet/srmpls
parent04ae8273f64a4f5a771da9b056bcccd1ebf9c7d9 (diff)
misc: clang-12 support
Type: improvement Change-Id: Ie8ebbbcf5e93337036998d6ba8dac393b20ebc72 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/srmpls')
0 files changed, 0 insertions, 0 deletions
133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 
/*
 * feat_bitmap.c: bitmap for managing feature invocation
 *
 * Copyright (c) 2013 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 <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ethernet/packet.h>
#include <vlib/cli.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/feat_bitmap.h>

#include <vppinfra/error.h>
#include <vppinfra/hash.h>
#include <vppinfra/cache.h>


/*
 * Drop node for feature bitmaps
 * For features that just do a drop, or are not yet implemented.
 * Initial feature dispatch nodes don't need to set b0->error
 * in case of a possible drop because that will be done here.
 *The next node is always error-drop.
 */

static vlib_node_registration_t feat_bitmap_drop_node;

#define foreach_feat_bitmap_drop_error		\
_(NO_FWD,     "L2 feature forwarding disabled")	\
_(NYI,        "L2 feature not implemented")

typedef enum
{
#define _(sym,str) FEAT_BITMAP_DROP_ERROR_##sym,
  foreach_feat_bitmap_drop_error
#undef _
    FEAT_BITMAP_DROP_N_ERROR,
} feat_bitmap_drop_error_t;

static char *feat_bitmap_drop_error_strings[] = {
#define _(sym,string) string,
  foreach_feat_bitmap_drop_error
#undef _
};

typedef enum
{
  FEAT_BITMAP_DROP_NEXT_DROP,
  FEAT_BITMAP_DROP_N_NEXT,
} feat_bitmap_drop_next_t;

typedef struct
{
  u32 feature_bitmap;
} feat_bitmap_drop_trace_t;

/* packet trace format function */
static u8 *
format_feat_bitmap_drop_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 *);
  feat_bitmap_drop_trace_t *t = va_arg (*args, feat_bitmap_drop_trace_t *);

  s =
    format (s, "feat_bitmap_drop: feature bitmap 0x%08x", t->feature_bitmap);
  return s;
}

static uword
feat_bitmap_drop_node_fn (vlib_main_t * vm,
			  vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  u32 n_left_from, *from, *to_next;
  feat_bitmap_drop_next_t next_index;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;	/* number of packets to process */
  next_index = node->cached_next_index;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;

      /* get space to enqueue frame to graph node "next_index" */
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

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

	  /* speculatively enqueue b0 to the current next frame */
	  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);

	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
	    {
	      feat_bitmap_drop_trace_t *t =
		vlib_add_trace (vm, node, b0, sizeof (*t));
	      t->feature_bitmap = vnet_buffer (b0)->l2.feature_bitmap;
	    }

	  if (vnet_buffer (b0)->l2.feature_bitmap == 1)
	    {
	      /*
	       * If we are executing the last feature, this is the
	       * No forwarding catch-all
	       */
	      b0->error = node->errors[FEAT_BITMAP_DROP_ERROR_NO_FWD];
	    }
	  else
	    {
	      b0->error = node->errors[FEAT_BITMAP_DROP_ERROR_NYI];
	    }
	  next0 = FEAT_BITMAP_DROP_NEXT_DROP;

	  /* 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;
}

clib_error_t *
feat_bitmap_drop_init (vlib_main_t * vm)
{
  return 0;
}

VLIB_INIT_FUNCTION (feat_bitmap_drop_init);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (feat_bitmap_drop_node,static) = {
  .function = feat_bitmap_drop_node_fn,
  .name = "feature-bitmap-drop",
  .vector_size = sizeof (u32),
  .format_trace = format_feat_bitmap_drop_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,

  .n_errors = ARRAY_LEN(feat_bitmap_drop_error_strings),
  .error_strings = feat_bitmap_drop_error_strings,

  .n_next_nodes = FEAT_BITMAP_DROP_N_NEXT,

  /* edit / add dispositions here */
  .next_nodes = {
    [FEAT_BITMAP_DROP_NEXT_DROP]  = "error-drop",
  },
};
/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */