API refactoring : classify

Change-Id: Ib75197ef8e5057e7f0d9361a10705c3743d05333
Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>

1 files changed, 555 insertions, 0 deletions

diff --git a/src/vnet/classify/classify_api.c b/src/vnet/classify/classify_api.c
new file mode 100644
index 00000000000..77a8b43464a
--- /dev/null
+++ b/src/vnet/classify/classify_api.c
@@ -0,0 +1,555 @@
+/*
+ *------------------------------------------------------------------
+ * classify_api.c - classify api
+ *
+ * Copyright (c) 2016 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/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+
+#include <vnet/classify/vnet_classify.h>
+#include <vnet/classify/input_acl.h>
+#include <vnet/classify/policer_classify.h>
+#include <vnet/classify/flow_classify.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_vpe_api_msg                                             \
+_(CLASSIFY_ADD_DEL_TABLE, classify_add_del_table)                       \
+_(CLASSIFY_ADD_DEL_SESSION, classify_add_del_session)                   \
+_(CLASSIFY_TABLE_IDS,classify_table_ids)                                \
+_(CLASSIFY_TABLE_BY_INTERFACE, classify_table_by_interface)             \
+_(CLASSIFY_TABLE_INFO,classify_table_info)                              \
+_(CLASSIFY_SESSION_DUMP,classify_session_dump)                          \
+_(CLASSIFY_SESSION_DETAILS,classify_session_details)                    \
+_(POLICER_CLASSIFY_SET_INTERFACE, policer_classify_set_interface)       \
+_(POLICER_CLASSIFY_DUMP, policer_classify_dump)                         \
+_(FLOW_CLASSIFY_SET_INTERFACE, flow_classify_set_interface)             \
+_(FLOW_CLASSIFY_DUMP, flow_classify_dump)
+
+#define foreach_classify_add_del_table_field    \
+_(table_index)                                  \
+_(nbuckets)                                     \
+_(memory_size)                                  \
+_(skip_n_vectors)                               \
+_(match_n_vectors)                              \
+_(next_table_index)                             \
+_(miss_next_index)                              \
+_(current_data_flag)                            \
+_(current_data_offset)
+
+static void vl_api_classify_add_del_table_t_handler
+  (vl_api_classify_add_del_table_t * mp)
+{
+  vl_api_classify_add_del_table_reply_t *rmp;
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  vnet_classify_table_t *t;
+  int rv;
+
+#define _(a) u32 a;
+  foreach_classify_add_del_table_field;
+#undef _
+
+#define _(a) a = ntohl(mp->a);
+  foreach_classify_add_del_table_field;
+#undef _
+
+  /* The underlying API fails silently, on purpose, so check here */
+  if (mp->is_add == 0)		/* delete */
+    {
+      if (pool_is_free_index (cm->tables, table_index))
+	{
+	  rv = VNET_API_ERROR_NO_SUCH_TABLE;
+	  goto out;
+	}
+    }
+  else				/* add or update */
+    {
+      if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
+	table_index = ~0;
+    }
+
+  rv = vnet_classify_add_del_table
+    (cm, mp->mask, nbuckets, memory_size,
+     skip_n_vectors, match_n_vectors,
+     next_table_index, miss_next_index, &table_index,
+     current_data_flag, current_data_offset, mp->is_add, mp->del_chain);
+
+out:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2(VL_API_CLASSIFY_ADD_DEL_TABLE_REPLY,
+  ({
+    if (rv == 0 && mp->is_add)
+      {
+        t = pool_elt_at_index (cm->tables, table_index);
+        rmp->skip_n_vectors = ntohl(t->skip_n_vectors);
+        rmp->match_n_vectors = ntohl(t->match_n_vectors);
+        rmp->new_table_index = ntohl(table_index);
+      }
+    else
+      {
+        rmp->skip_n_vectors = ~0;
+        rmp->match_n_vectors = ~0;
+        rmp->new_table_index = ~0;
+      }
+  }));
+  /* *INDENT-ON* */
+}
+
+static void vl_api_classify_add_del_session_t_handler
+  (vl_api_classify_add_del_session_t * mp)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  vl_api_classify_add_del_session_reply_t *rmp;
+  int rv;
+  u32 table_index, hit_next_index, opaque_index, metadata;
+  i32 advance;
+  u8 action;
+
+  table_index = ntohl (mp->table_index);
+  hit_next_index = ntohl (mp->hit_next_index);
+  opaque_index = ntohl (mp->opaque_index);
+  advance = ntohl (mp->advance);
+  action = mp->action;
+  metadata = ntohl (mp->metadata);
+
+  rv = vnet_classify_add_del_session
+    (cm, table_index, mp->match, hit_next_index, opaque_index,
+     advance, action, metadata, mp->is_add);
+
+  REPLY_MACRO (VL_API_CLASSIFY_ADD_DEL_SESSION_REPLY);
+}
+
+static void
+  vl_api_policer_classify_set_interface_t_handler
+  (vl_api_policer_classify_set_interface_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vl_api_policer_classify_set_interface_reply_t *rmp;
+  int rv;
+  u32 sw_if_index, ip4_table_index, ip6_table_index, l2_table_index;
+
+  ip4_table_index = ntohl (mp->ip4_table_index);
+  ip6_table_index = ntohl (mp->ip6_table_index);
+  l2_table_index = ntohl (mp->l2_table_index);
+  sw_if_index = ntohl (mp->sw_if_index);
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = vnet_set_policer_classify_intfc (vm, sw_if_index, ip4_table_index,
+					ip6_table_index, l2_table_index,
+					mp->is_add);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_POLICER_CLASSIFY_SET_INTERFACE_REPLY);
+}
+
+static void
+send_policer_classify_details (u32 sw_if_index,
+			       u32 table_index,
+			       unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_policer_classify_details_t *mp;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_POLICER_CLASSIFY_DETAILS);
+  mp->context = context;
+  mp->sw_if_index = htonl (sw_if_index);
+  mp->table_index = htonl (table_index);
+
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static void
+vl_api_policer_classify_dump_t_handler (vl_api_policer_classify_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  policer_classify_main_t *pcm = &policer_classify_main;
+  u32 *vec_tbl;
+  int i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  vec_tbl = pcm->classify_table_index_by_sw_if_index[mp->type];
+
+  if (vec_len (vec_tbl))
+    {
+      for (i = 0; i < vec_len (vec_tbl); i++)
+	{
+	  if (vec_elt (vec_tbl, i) == ~0)
+	    continue;
+
+	  send_policer_classify_details (i, vec_elt (vec_tbl, i), q,
+					 mp->context);
+	}
+    }
+}
+
+static void
+vl_api_classify_table_ids_t_handler (vl_api_classify_table_ids_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  vnet_classify_table_t *t;
+  u32 *table_ids = 0;
+  u32 count;
+
+   /* *INDENT-OFF* */
+   pool_foreach (t, cm->tables,
+   ({
+     vec_add1 (table_ids, ntohl(t - cm->tables));
+   }));
+   /* *INDENT-ON* */
+  count = vec_len (table_ids);
+
+  vl_api_classify_table_ids_reply_t *rmp;
+  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp) + count * sizeof (u32));
+  rmp->_vl_msg_id = ntohs (VL_API_CLASSIFY_TABLE_IDS_REPLY);
+  rmp->context = mp->context;
+  rmp->count = ntohl (count);
+  clib_memcpy (rmp->ids, table_ids, count * sizeof (u32));
+  rmp->retval = 0;
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+
+  vec_free (table_ids);
+}
+
+static void
+  vl_api_classify_table_by_interface_t_handler
+  (vl_api_classify_table_by_interface_t * mp)
+{
+  vl_api_classify_table_by_interface_reply_t *rmp;
+  int rv = 0;
+
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  u32 *acl = 0;
+
+  vec_validate (acl, INPUT_ACL_N_TABLES - 1);
+  vec_set (acl, ~0);
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  input_acl_main_t *am = &input_acl_main;
+
+  int if_idx;
+  u32 type;
+
+  for (type = 0; type < INPUT_ACL_N_TABLES; type++)
+    {
+      u32 *vec_tbl = am->classify_table_index_by_sw_if_index[type];
+      if (vec_len (vec_tbl))
+	{
+	  for (if_idx = 0; if_idx < vec_len (vec_tbl); if_idx++)
+	    {
+	      if (vec_elt (vec_tbl, if_idx) == ~0 || sw_if_index != if_idx)
+		{
+		  continue;
+		}
+	      acl[type] = vec_elt (vec_tbl, if_idx);
+	    }
+	}
+    }
+
+  BAD_SW_IF_INDEX_LABEL;
+
+   /* *INDENT-OFF* */
+   REPLY_MACRO2(VL_API_CLASSIFY_TABLE_BY_INTERFACE_REPLY,
+   ({
+     rmp->sw_if_index = ntohl(sw_if_index);
+     rmp->l2_table_id = ntohl(acl[INPUT_ACL_TABLE_L2]);
+     rmp->ip4_table_id = ntohl(acl[INPUT_ACL_TABLE_IP4]);
+     rmp->ip6_table_id = ntohl(acl[INPUT_ACL_TABLE_IP6]);
+   }));
+   /* *INDENT-ON* */
+  vec_free (acl);
+}
+
+static void
+vl_api_classify_table_info_t_handler (vl_api_classify_table_info_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  vl_api_classify_table_info_reply_t *rmp = 0;
+
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  u32 table_id = ntohl (mp->table_id);
+  vnet_classify_table_t *t;
+
+   /* *INDENT-OFF* */
+   pool_foreach (t, cm->tables,
+   ({
+     if (table_id == t - cm->tables)
+       {
+         rmp = vl_msg_api_alloc_as_if_client
+           (sizeof (*rmp) + t->match_n_vectors * sizeof (u32x4));
+         rmp->_vl_msg_id = ntohs (VL_API_CLASSIFY_TABLE_INFO_REPLY);
+         rmp->context = mp->context;
+         rmp->table_id = ntohl(table_id);
+         rmp->nbuckets = ntohl(t->nbuckets);
+         rmp->match_n_vectors = ntohl(t->match_n_vectors);
+         rmp->skip_n_vectors = ntohl(t->skip_n_vectors);
+         rmp->active_sessions = ntohl(t->active_elements);
+         rmp->next_table_index = ntohl(t->next_table_index);
+         rmp->miss_next_index = ntohl(t->miss_next_index);
+         rmp->mask_length = ntohl(t->match_n_vectors * sizeof (u32x4));
+         clib_memcpy(rmp->mask, t->mask, t->match_n_vectors * sizeof(u32x4));
+         rmp->retval = 0;
+         break;
+       }
+   }));
+   /* *INDENT-ON* */
+
+  if (rmp == 0)
+    {
+      rmp = vl_msg_api_alloc (sizeof (*rmp));
+      rmp->_vl_msg_id = ntohs ((VL_API_CLASSIFY_TABLE_INFO_REPLY));
+      rmp->context = mp->context;
+      rmp->retval = ntohl (VNET_API_ERROR_CLASSIFY_TABLE_NOT_FOUND);
+    }
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_classify_session_details_t_handler (vl_api_classify_session_details_t *
+					   mp)
+{
+  clib_warning ("BUG");
+}
+
+static void
+send_classify_session_details (unix_shared_memory_queue_t * q,
+			       u32 table_id,
+			       u32 match_length,
+			       vnet_classify_entry_t * e, u32 context)
+{
+  vl_api_classify_session_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_CLASSIFY_SESSION_DETAILS);
+  rmp->context = context;
+  rmp->table_id = ntohl (table_id);
+  rmp->hit_next_index = ntohl (e->next_index);
+  rmp->advance = ntohl (e->advance);
+  rmp->opaque_index = ntohl (e->opaque_index);
+  rmp->match_length = ntohl (match_length);
+  clib_memcpy (rmp->match, e->key, match_length);
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_classify_session_dump_t_handler (vl_api_classify_session_dump_t * mp)
+{
+  vnet_classify_main_t *cm = &vnet_classify_main;
+  unix_shared_memory_queue_t *q;
+
+  u32 table_id = ntohl (mp->table_id);
+  vnet_classify_table_t *t;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (!q)
+    return;
+
+  /* *INDENT-OFF* */
+  pool_foreach (t, cm->tables,
+  ({
+    if (table_id == t - cm->tables)
+      {
+        vnet_classify_bucket_t * b;
+        vnet_classify_entry_t * v, * save_v;
+        int i, j, k;
+
+        for (i = 0; i < t->nbuckets; i++)
+          {
+            b = &t->buckets [i];
+            if (b->offset == 0)
+              continue;
+
+            save_v = vnet_classify_get_entry (t, b->offset);
+            for (j = 0; j < (1<<b->log2_pages); j++)
+              {
+                for (k = 0; k < t->entries_per_page; k++)
+                  {
+                    v = vnet_classify_entry_at_index
+                      (t, save_v, j*t->entries_per_page + k);
+                    if (vnet_classify_entry_is_free (v))
+                      continue;
+
+                    send_classify_session_details
+                      (q, table_id, t->match_n_vectors * sizeof (u32x4),
+                       v, mp->context);
+                  }
+              }
+          }
+        break;
+      }
+  }));
+  /* *INDENT-ON* */
+}
+
+static void
+  vl_api_flow_classify_set_interface_t_handler
+  (vl_api_flow_classify_set_interface_t * mp)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vl_api_flow_classify_set_interface_reply_t *rmp;
+  int rv;
+  u32 sw_if_index, ip4_table_index, ip6_table_index;
+
+  ip4_table_index = ntohl (mp->ip4_table_index);
+  ip6_table_index = ntohl (mp->ip6_table_index);
+  sw_if_index = ntohl (mp->sw_if_index);
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = vnet_set_flow_classify_intfc (vm, sw_if_index, ip4_table_index,
+				     ip6_table_index, mp->is_add);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_FLOW_CLASSIFY_SET_INTERFACE_REPLY);
+}
+
+static void
+send_flow_classify_details (u32 sw_if_index,
+			    u32 table_index,
+			    unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_flow_classify_details_t *mp;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_FLOW_CLASSIFY_DETAILS);
+  mp->context = context;
+  mp->sw_if_index = htonl (sw_if_index);
+  mp->table_index = htonl (table_index);
+
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+static void
+vl_api_flow_classify_dump_t_handler (vl_api_flow_classify_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  flow_classify_main_t *pcm = &flow_classify_main;
+  u32 *vec_tbl;
+  int i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  vec_tbl = pcm->classify_table_index_by_sw_if_index[mp->type];
+
+  if (vec_len (vec_tbl))
+    {
+      for (i = 0; i < vec_len (vec_tbl); i++)
+	{
+	  if (vec_elt (vec_tbl, i) == ~0)
+	    continue;
+
+	  send_flow_classify_details (i, vec_elt (vec_tbl, i), q,
+				      mp->context);
+	}
+    }
+}
+
+/*
+ * classify_api_hookup
+ * Add vpe's API message handlers to the table.
+ * vlib has alread mapped shared memory and
+ * added the client registration handlers.
+ * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
+ */
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+  foreach_vl_msg_name_crc_classify;
+#undef _
+}
+
+static clib_error_t *
+classify_api_hookup (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1);
+  foreach_vpe_api_msg;
+#undef _
+
+  /*
+   * Set up the (msg_name, crc, message-id) table
+   */
+  setup_message_id_table (am);
+
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (classify_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */