src/vnet/crypto/node.c

   1 /*
   2  * Copyright (c) 2020 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <stdbool.h>
  17 #include <vlib/vlib.h>
  18 #include <vnet/crypto/crypto.h>
  19
  20 typedef enum
  21 {
  22 #define _(sym,str) VNET_CRYPTO_ASYNC_ERROR_##sym,
  23   foreach_crypto_op_status
  24 #undef _
  25     VNET_CRYPTO_ASYNC_N_ERROR,
  26 } vnet_crypto_async_error_t;
  27
  28 static char *vnet_crypto_async_error_strings[] = {
  29 #define _(sym,string) string,
  30   foreach_crypto_op_status
  31 #undef _
  32 };
  33
  34 #define foreach_crypto_dispatch_next \
  35   _(ERR_DROP, "error-drop")
  36
  37 typedef enum
  38 {
  39 #define _(n, s) CRYPTO_DISPATCH_NEXT_##n,
  40   foreach_crypto_dispatch_next
  41 #undef _
  42     CRYPTO_DISPATCH_N_NEXT,
  43 } crypto_dispatch_next_t;
  44
  45 typedef struct
  46 {
  47   vnet_crypto_op_status_t op_status;
  48   vnet_crypto_async_op_id_t op;
  49 } crypto_dispatch_trace_t;
  50
  51 static u8 *
  52 format_crypto_dispatch_trace (u8 * s, va_list * args)
  53 {
  54   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  55   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  56   crypto_dispatch_trace_t *t = va_arg (*args, crypto_dispatch_trace_t *);
  57
  58   s = format (s, "%U: %U", format_vnet_crypto_async_op, t->op,
  59               format_vnet_crypto_op_status, t->op_status);
  60   return s;
  61 }
  62
  63 static void
  64 vnet_crypto_async_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
  65                              vlib_buffer_t * b,
  66                              vnet_crypto_async_op_id_t op_id,
  67                              vnet_crypto_op_status_t status)
  68 {
  69   crypto_dispatch_trace_t *tr = vlib_add_trace (vm, node, b, sizeof (*tr));
  70   tr->op_status = status;
  71   tr->op = op_id;
  72 }
  73
  74 static_always_inline u32
  75 crypto_dequeue_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
  76                       vnet_crypto_thread_t * ct,
  77                       vnet_crypto_frame_dequeue_t * hdl,
  78                       u32 n_cache, u32 * n_total)
  79 {
  80   vnet_crypto_async_frame_t *cf = (hdl) (vm);
  81
  82   while (cf)
  83     {
  84       vec_validate (ct->buffer_indice, n_cache + cf->n_elts);
  85       vec_validate (ct->nexts, n_cache + cf->n_elts);
  86       clib_memcpy_fast (ct->buffer_indice + n_cache, cf->buffer_indices,
  87                         sizeof (u32) * cf->n_elts);
  88       if (cf->state == VNET_CRYPTO_FRAME_STATE_SUCCESS)
  89         {
  90           clib_memcpy_fast (ct->nexts + n_cache, cf->next_node_index,
  91                             sizeof (u16) * cf->n_elts);
  92         }
  93       else
  94         {
  95           u32 i;
  96           for (i = 0; i < cf->n_elts; i++)
  97             {
  98               if (cf->elts[i].status != VNET_CRYPTO_OP_STATUS_COMPLETED)
  99                 {
 100                   ct->nexts[i + n_cache] = CRYPTO_DISPATCH_NEXT_ERR_DROP;
 101                   vlib_node_increment_counter (vm, node->node_index,
 102                                                cf->elts[i].status, 1);
 103                 }
 104               else
 105                 ct->nexts[i + n_cache] = cf->next_node_index[i];
 106             }
 107         }
 108       n_cache += cf->n_elts;
 109       *n_total += cf->n_elts;
 110       if (n_cache >= VLIB_FRAME_SIZE)
 111         {
 112           vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indice, ct->nexts,
 113                                        n_cache);
 114           n_cache = 0;
 115         }
 116
 117       if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
 118         {
 119           u32 i;
 120
 121           for (i = 0; i < cf->n_elts; i++)
 122             {
 123               vlib_buffer_t *b = vlib_get_buffer (vm, cf->buffer_indices[i]);
 124               if (b->flags & VLIB_BUFFER_IS_TRACED)
 125                 vnet_crypto_async_add_trace (vm, node, b, cf->op,
 126                                              cf->elts[i].status);
 127             }
 128         }
 129       vnet_crypto_async_free_frame (vm, cf);
 130       cf = (hdl) (vm);
 131     }
 132
 133   return n_cache;
 134 }
 135
 136 VLIB_NODE_FN (crypto_dispatch_node) (vlib_main_t * vm,
 137                                      vlib_node_runtime_t * node,
 138                                      vlib_frame_t * frame)
 139 {
 140   vnet_crypto_main_t *cm = &crypto_main;
 141   vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
 142   u32 n_dispatched = 0, n_cache = 0;
 143   u32 index;
 144
 145   /* *INDENT-OFF* */
 146   clib_bitmap_foreach (index, cm->async_active_ids, ({
 147     n_cache = crypto_dequeue_frame (vm, node, ct, cm->dequeue_handlers[index],
 148                                     n_cache, &n_dispatched);
 149   }));
 150   /* *INDENT-ON* */
 151   if (n_cache)
 152     vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indice, ct->nexts,
 153                                  n_cache);
 154
 155   return n_dispatched;
 156 }
 157
 158 /* *INDENT-OFF* */
 159 VLIB_REGISTER_NODE (crypto_dispatch_node) = {
 160   .name = "crypto-dispatch",
 161   .type = VLIB_NODE_TYPE_INPUT,
 162   .state = VLIB_NODE_STATE_DISABLED,
 163   .format_trace = format_crypto_dispatch_trace,
 164
 165   .n_errors = ARRAY_LEN(vnet_crypto_async_error_strings),
 166   .error_strings = vnet_crypto_async_error_strings,
 167
 168   .n_next_nodes = CRYPTO_DISPATCH_N_NEXT,
 169   .next_nodes = {
 170 #define _(n, s) \
 171   [CRYPTO_DISPATCH_NEXT_##n] = s,
 172       foreach_crypto_dispatch_next
 173 #undef _
 174   },
 175 };
 176 /* *INDENT-ON* */
 177
 178 /*
 179  * fd.io coding-style-patch-verification: ON
 180  *
 181  * Local Variables:
 182  * eval: (c-set-style "gnu")
 183  * End:
 184  */