--- /dev/null
+/*
+ * 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 <plugins/gbp/gbp.h>
+#include <plugins/gbp/gbp_fwd_dpo.h>
+#include <plugins/gbp/gbp_policy_dpo.h>
+#include <plugins/gbp/gbp_route_domain.h>
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/dpo/load_balance.h>
+
+/**
+ * a key for the DB
+ */
+typedef struct gbp_subnet_key_t_
+{
+ fib_prefix_t gsk_pfx;
+ u32 gsk_fib_index;
+} gbp_subnet_key_t;
+
+/**
+ * Subnet
+ */
+typedef struct gbp_subnet_t_
+{
+ gbp_subnet_key_t *gs_key;
+ gbp_subnet_type_t gs_type;
+ index_t gs_rd;
+
+ union
+ {
+ struct
+ {
+ sclass_t gs_sclass;
+ u32 gs_sw_if_index;
+ } gs_stitched_external;
+ struct
+ {
+ sclass_t gs_sclass;
+ } gs_l3_out;
+ };
+
+ fib_node_index_t gs_fei;
+} gbp_subnet_t;
+
+/**
+ * A DB of the subnets; key={pfx,fib-index}
+ */
+uword *gbp_subnet_db;
+
+/**
+ * pool of subnets
+ */
+gbp_subnet_t *gbp_subnet_pool;
+
+static fib_source_t gbp_fib_source;
+
+static index_t
+gbp_subnet_db_find (u32 fib_index, const fib_prefix_t * pfx)
+{
+ gbp_subnet_key_t key = {
+ .gsk_pfx = *pfx,
+ .gsk_fib_index = fib_index,
+ };
+ uword *p;
+
+ p = hash_get_mem (gbp_subnet_db, &key);
+
+ if (NULL != p)
+ return p[0];
+
+ return (INDEX_INVALID);
+}
+
+static void
+gbp_subnet_db_add (u32 fib_index, const fib_prefix_t * pfx, gbp_subnet_t * gs)
+{
+ gbp_subnet_key_t *key;
+
+ key = clib_mem_alloc (sizeof (*key));
+
+ clib_memcpy (&(key->gsk_pfx), pfx, sizeof (*pfx));
+ key->gsk_fib_index = fib_index;
+
+ hash_set_mem (gbp_subnet_db, key, (gs - gbp_subnet_pool));
+
+ gs->gs_key = key;
+}
+
+static void
+gbp_subnet_db_del (gbp_subnet_t * gs)
+{
+ hash_unset_mem (gbp_subnet_db, gs->gs_key);
+
+ clib_mem_free (gs->gs_key);
+ gs->gs_key = NULL;
+}
+
+
+static int
+gbp_subnet_transport_add (gbp_subnet_t * gs)
+{
+ dpo_id_t gfd = DPO_INVALID;
+ gbp_route_domain_t *grd;
+ fib_protocol_t fproto;
+
+ fproto = gs->gs_key->gsk_pfx.fp_proto;
+ grd = gbp_route_domain_get (gs->gs_rd);
+
+ if (~0 == grd->grd_uu_sw_if_index[fproto])
+ return (VNET_API_ERROR_INVALID_SW_IF_INDEX);
+
+ gs->gs_fei = fib_table_entry_update_one_path (gs->gs_key->gsk_fib_index,
+ &gs->gs_key->gsk_pfx,
+ gbp_fib_source,
+ FIB_ENTRY_FLAG_NONE,
+ fib_proto_to_dpo (fproto),
+ &ADJ_BCAST_ADDR,
+ grd->grd_uu_sw_if_index
+ [fproto], ~0, 1, NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+
+ dpo_reset (&gfd);
+
+ return (0);
+}
+
+static int
+gbp_subnet_internal_add (gbp_subnet_t * gs)
+{
+ dpo_id_t gfd = DPO_INVALID;
+
+ gbp_fwd_dpo_add_or_lock (fib_proto_to_dpo (gs->gs_key->gsk_pfx.fp_proto),
+ &gfd);
+
+ gs->gs_fei = fib_table_entry_special_dpo_update (gs->gs_key->gsk_fib_index,
+ &gs->gs_key->gsk_pfx,
+ gbp_fib_source,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &gfd);
+
+ dpo_reset (&gfd);
+
+ return (0);
+}
+
+static int
+gbp_subnet_external_add (gbp_subnet_t * gs, u32 sw_if_index, sclass_t sclass)
+{
+ dpo_id_t gpd = DPO_INVALID;
+
+ gs->gs_stitched_external.gs_sclass = sclass;
+ gs->gs_stitched_external.gs_sw_if_index = sw_if_index;
+
+ gbp_policy_dpo_add_or_lock (fib_proto_to_dpo (gs->gs_key->gsk_pfx.fp_proto),
+ gbp_route_domain_get_scope (gs->gs_rd),
+ gs->gs_stitched_external.gs_sclass,
+ gs->gs_stitched_external.gs_sw_if_index, &gpd);
+
+ gs->gs_fei = fib_table_entry_special_dpo_update (gs->gs_key->gsk_fib_index,
+ &gs->gs_key->gsk_pfx,
+ gbp_fib_source,
+ (FIB_ENTRY_FLAG_EXCLUSIVE |
+ FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT),
+ &gpd);
+
+ dpo_reset (&gpd);
+
+ return (0);
+}
+
+static int
+gbp_subnet_l3_out_add (gbp_subnet_t * gs, sclass_t sclass, int is_anon)
+{
+ fib_entry_flag_t flags;
+ dpo_id_t gpd = DPO_INVALID;
+
+ gs->gs_l3_out.gs_sclass = sclass;
+
+ gbp_policy_dpo_add_or_lock (fib_proto_to_dpo (gs->gs_key->gsk_pfx.fp_proto),
+ gbp_route_domain_get_scope (gs->gs_rd),
+ gs->gs_l3_out.gs_sclass, ~0, &gpd);
+
+ flags = FIB_ENTRY_FLAG_INTERPOSE;
+ if (is_anon)
+ flags |= FIB_ENTRY_FLAG_COVERED_INHERIT;
+
+ gs->gs_fei = fib_table_entry_special_dpo_add (gs->gs_key->gsk_fib_index,
+ &gs->gs_key->gsk_pfx,
+ FIB_SOURCE_SPECIAL,
+ flags, &gpd);
+
+ dpo_reset (&gpd);
+
+ return (0);
+}
+
+static void
+gbp_subnet_del_i (index_t gsi)
+{
+ gbp_subnet_t *gs;
+
+ gs = pool_elt_at_index (gbp_subnet_pool, gsi);
+
+ fib_table_entry_delete_index (gs->gs_fei,
+ (GBP_SUBNET_L3_OUT == gs->gs_type
+ || GBP_SUBNET_ANON_L3_OUT ==
+ gs->gs_type) ? FIB_SOURCE_SPECIAL :
+ gbp_fib_source);
+
+ gbp_subnet_db_del (gs);
+ gbp_route_domain_unlock (gs->gs_rd);
+
+ pool_put (gbp_subnet_pool, gs);
+}
+
+int
+gbp_subnet_del (u32 rd_id, const fib_prefix_t * pfx)
+{
+ gbp_route_domain_t *grd;
+ index_t gsi, grdi;
+ u32 fib_index;
+
+ grdi = gbp_route_domain_find (rd_id);
+
+ if (~0 == grdi)
+ return (VNET_API_ERROR_NO_SUCH_FIB);
+
+ grd = gbp_route_domain_get (grdi);
+ fib_index = grd->grd_fib_index[pfx->fp_proto];
+
+ gsi = gbp_subnet_db_find (fib_index, pfx);
+
+ if (INDEX_INVALID == gsi)
+ return (VNET_API_ERROR_NO_SUCH_ENTRY);
+
+ gbp_subnet_del_i (gsi);
+
+ return (0);
+}
+
+int
+gbp_subnet_add (u32 rd_id,
+ const fib_prefix_t * pfx,
+ gbp_subnet_type_t type, u32 sw_if_index, sclass_t sclass)
+{
+ gbp_route_domain_t *grd;
+ index_t grdi, gsi;
+ gbp_subnet_t *gs;
+ u32 fib_index;
+ int rv;
+
+ switch (type)
+ {
+ case GBP_SUBNET_TRANSPORT:
+ case GBP_SUBNET_STITCHED_INTERNAL:
+ case GBP_SUBNET_STITCHED_EXTERNAL:
+ case GBP_SUBNET_L3_OUT:
+ case GBP_SUBNET_ANON_L3_OUT:
+ break;
+ default:
+ return (VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE);
+ }
+
+ grdi = gbp_route_domain_find_and_lock (rd_id);
+
+ if (~0 == grdi)
+ return (VNET_API_ERROR_NO_SUCH_FIB);
+
+ grd = gbp_route_domain_get (grdi);
+ fib_index = grd->grd_fib_index[pfx->fp_proto];
+
+ gsi = gbp_subnet_db_find (fib_index, pfx);
+
+ /*
+ * this is an update if the subnet already exists, so remove the old
+ */
+ if (INDEX_INVALID != gsi)
+ gbp_subnet_del_i (gsi);
+
+ rv = -2;
+
+ pool_get (gbp_subnet_pool, gs);
+
+ gs->gs_type = type;
+ gs->gs_rd = grdi;
+ gbp_subnet_db_add (fib_index, pfx, gs);
+
+ switch (type)
+ {
+ case GBP_SUBNET_STITCHED_INTERNAL:
+ rv = gbp_subnet_internal_add (gs);
+ break;
+ case GBP_SUBNET_STITCHED_EXTERNAL:
+ rv = gbp_subnet_external_add (gs, sw_if_index, sclass);
+ break;
+ case GBP_SUBNET_TRANSPORT:
+ rv = gbp_subnet_transport_add (gs);
+ break;
+ case GBP_SUBNET_L3_OUT:
+ rv = gbp_subnet_l3_out_add (gs, sclass, 0 /* is_anon */ );
+ break;
+ case GBP_SUBNET_ANON_L3_OUT:
+ rv = gbp_subnet_l3_out_add (gs, sclass, 1 /* is_anon */ );
+ break;
+ }
+
+ return (rv);
+}
+
+static clib_error_t *
+gbp_subnet_add_del_cli (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ vnet_main_t *vnm = vnet_get_main ();
+ fib_prefix_t pfx = {.fp_addr = ip46_address_initializer };
+ int length;
+ u32 rd_id = ~0;
+ u32 sw_if_index = ~0;
+ gbp_subnet_type_t type = ~0;
+ u32 sclass = ~0;
+ int is_add = 1;
+ int rv;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "del"))
+ is_add = 0;
+ else if (unformat (line_input, "rd %d", &rd_id))
+ ;
+ else
+ if (unformat
+ (line_input, "prefix %U/%d", unformat_ip4_address,
+ &pfx.fp_addr.ip4, &length))
+ pfx.fp_proto = FIB_PROTOCOL_IP4;
+ else
+ if (unformat
+ (line_input, "prefix %U/%d", unformat_ip6_address,
+ &pfx.fp_addr.ip6, &length))
+ pfx.fp_proto = FIB_PROTOCOL_IP6;
+ else if (unformat (line_input, "type transport"))
+ type = GBP_SUBNET_TRANSPORT;
+ else if (unformat (line_input, "type stitched-internal"))
+ type = GBP_SUBNET_STITCHED_INTERNAL;
+ else if (unformat (line_input, "type stitched-external"))
+ type = GBP_SUBNET_STITCHED_EXTERNAL;
+ else if (unformat (line_input, "type anon-l3-out"))
+ type = GBP_SUBNET_ANON_L3_OUT;
+ else if (unformat (line_input, "type l3-out"))
+ type = GBP_SUBNET_L3_OUT;
+ else
+ if (unformat_user
+ (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "sclass %u", &sclass))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+ unformat_free (line_input);
+
+ pfx.fp_len = length;
+
+ if (is_add)
+ rv = gbp_subnet_add (rd_id, &pfx, type, sw_if_index, sclass);
+ else
+ rv = gbp_subnet_del (rd_id, &pfx);
+
+ switch (rv)
+ {
+ case 0:
+ return 0;
+ case VNET_API_ERROR_NO_SUCH_FIB:
+ return clib_error_return (0, "no such FIB");
+ }
+
+ return clib_error_return (0, "unknown error %d", rv);
+}
+
+/*?
+ * Add Group Based Policy Subnets
+ *
+ * @cliexpar
+ * @cliexstart{gbp subnet [del] rd <ID> prefix <prefix> type <type> [<interface>] [sclass <sclass>]}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_subnet_add_del, static) = {
+ .path = "gbp subnet",
+ .short_help = "gbp subnet [del] rd <ID> prefix <prefix> type <type> [<interface>] [sclass <sclass>]\n",
+ .function = gbp_subnet_add_del_cli,
+};
+/* *INDENT-ON* */
+
+
+
+void
+gbp_subnet_walk (gbp_subnet_cb_t cb, void *ctx)
+{
+ gbp_route_domain_t *grd;
+ gbp_subnet_t *gs;
+ u32 sw_if_index;
+ sclass_t sclass;
+
+ sclass = SCLASS_INVALID;
+ sw_if_index = ~0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (gs, gbp_subnet_pool)
+ {
+ grd = gbp_route_domain_get(gs->gs_rd);
+
+ switch (gs->gs_type)
+ {
+ case GBP_SUBNET_STITCHED_INTERNAL:
+ case GBP_SUBNET_TRANSPORT:
+ /* use defaults above */
+ break;
+ case GBP_SUBNET_STITCHED_EXTERNAL:
+ sw_if_index = gs->gs_stitched_external.gs_sw_if_index;
+ sclass = gs->gs_stitched_external.gs_sclass;
+ break;
+ case GBP_SUBNET_L3_OUT:
+ case GBP_SUBNET_ANON_L3_OUT:
+ sclass = gs->gs_l3_out.gs_sclass;
+ break;
+ }
+
+ if (WALK_STOP == cb (grd->grd_id, &gs->gs_key->gsk_pfx,
+ gs->gs_type, sw_if_index, sclass, ctx))
+ break;
+ }
+ /* *INDENT-ON* */
+}
+
+typedef enum gsb_subnet_show_flags_t_
+{
+ GBP_SUBNET_SHOW_BRIEF,
+ GBP_SUBNET_SHOW_DETAILS,
+} gsb_subnet_show_flags_t;
+
+static u8 *
+format_gbp_subnet_type (u8 * s, va_list * args)
+{
+ gbp_subnet_type_t type = va_arg (*args, gbp_subnet_type_t);
+
+ switch (type)
+ {
+ case GBP_SUBNET_STITCHED_INTERNAL:
+ return (format (s, "stitched-internal"));
+ case GBP_SUBNET_STITCHED_EXTERNAL:
+ return (format (s, "stitched-external"));
+ case GBP_SUBNET_TRANSPORT:
+ return (format (s, "transport"));
+ case GBP_SUBNET_L3_OUT:
+ return (format (s, "l3-out"));
+ case GBP_SUBNET_ANON_L3_OUT:
+ return (format (s, "anon-l3-out"));
+ }
+
+ return (format (s, "unknown"));
+}
+
+u8 *
+format_gbp_subnet (u8 * s, va_list * args)
+{
+ index_t gsi = va_arg (*args, index_t);
+ gsb_subnet_show_flags_t flags = va_arg (*args, gsb_subnet_show_flags_t);
+ gbp_subnet_t *gs;
+ u32 table_id;
+
+ gs = pool_elt_at_index (gbp_subnet_pool, gsi);
+
+ table_id = fib_table_get_table_id (gs->gs_key->gsk_fib_index,
+ gs->gs_key->gsk_pfx.fp_proto);
+
+ s = format (s, "[%d] tbl:%d %U %U", gsi, table_id,
+ format_fib_prefix, &gs->gs_key->gsk_pfx,
+ format_gbp_subnet_type, gs->gs_type);
+
+ switch (gs->gs_type)
+ {
+ case GBP_SUBNET_STITCHED_INTERNAL:
+ case GBP_SUBNET_TRANSPORT:
+ break;
+ case GBP_SUBNET_STITCHED_EXTERNAL:
+ s = format (s, " {sclass:%d %U}", gs->gs_stitched_external.gs_sclass,
+ format_vnet_sw_if_index_name,
+ vnet_get_main (), gs->gs_stitched_external.gs_sw_if_index);
+ break;
+ case GBP_SUBNET_L3_OUT:
+ case GBP_SUBNET_ANON_L3_OUT:
+ s = format (s, " {sclass:%d}", gs->gs_l3_out.gs_sclass);
+ break;
+ }
+
+ switch (flags)
+ {
+ case GBP_SUBNET_SHOW_DETAILS:
+ {
+ s = format (s, "\n %U", format_fib_entry, gs->gs_fei,
+ FIB_ENTRY_FORMAT_DETAIL);
+ }
+ case GBP_SUBNET_SHOW_BRIEF:
+ break;
+ }
+ return (s);
+}
+
+static clib_error_t *
+gbp_subnet_show (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ u32 gsi;
+
+ gsi = INDEX_INVALID;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%d", &gsi))
+ ;
+ else
+ break;
+ }
+
+ if (INDEX_INVALID != gsi)
+ {
+ vlib_cli_output (vm, "%U", format_gbp_subnet, gsi,
+ GBP_SUBNET_SHOW_DETAILS);
+ }
+ else
+ {
+ /* *INDENT-OFF* */
+ pool_foreach_index (gsi, gbp_subnet_pool)
+ {
+ vlib_cli_output (vm, "%U", format_gbp_subnet, gsi,
+ GBP_SUBNET_SHOW_BRIEF);
+ }
+ /* *INDENT-ON* */
+ }
+
+ return (NULL);
+}
+
+/*?
+ * Show Group Based Policy Subnets
+ *
+ * @cliexpar
+ * @cliexstart{show gbp subnet}
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (gbp_subnet_show_node, static) = {
+ .path = "show gbp subnet",
+ .short_help = "show gbp subnet\n",
+ .function = gbp_subnet_show,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+gbp_subnet_init (vlib_main_t * vm)
+{
+ gbp_subnet_db = hash_create_mem (0,
+ sizeof (gbp_subnet_key_t), sizeof (u32));
+ gbp_fib_source = fib_source_allocate ("gbp-subnet",
+ FIB_SOURCE_PRIORITY_HI,
+ FIB_SOURCE_BH_SIMPLE);
+
+ return (NULL);
+}
+
+VLIB_INIT_FUNCTION (gbp_subnet_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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