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-rw-r--r--src/vnet/lisp-gpe/lisp_gpe_tenant.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/src/vnet/lisp-gpe/lisp_gpe_tenant.c b/src/vnet/lisp-gpe/lisp_gpe_tenant.c
new file mode 100644
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+++ b/src/vnet/lisp-gpe/lisp_gpe_tenant.c
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+/*
+ * 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/lisp-gpe/lisp_gpe_tenant.h>
+
+/**
+ * The pool of all tenants
+ */
+static lisp_gpe_tenant_t *lisp_gpe_tenant_pool;
+
+/**
+ * The hash table of all tenants: key:{VNI}.
+ */
+uword *lisp_gpe_tenant_db;
+
+static lisp_gpe_tenant_t *
+lisp_gpe_tenant_find (u32 vni)
+{
+ uword *p;
+
+ p = hash_get (lisp_gpe_tenant_db, vni);
+
+ if (NULL == p)
+ return (NULL);
+
+ return (pool_elt_at_index (lisp_gpe_tenant_pool, p[0]));
+}
+
+static lisp_gpe_tenant_t *
+lisp_gpe_tenant_find_or_create_i (u32 vni)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find (vni);
+
+ if (NULL == lt)
+ {
+ pool_get (lisp_gpe_tenant_pool, lt);
+ memset (lt, 0, sizeof (*lt));
+
+ lt->lt_vni = vni;
+ lt->lt_table_id = ~0;
+ lt->lt_bd_id = ~0;
+
+ hash_set (lisp_gpe_tenant_db, vni, lt - lisp_gpe_tenant_pool);
+ }
+
+ return (lt);
+}
+
+/**
+ * @brief Find or create a tenant for the given VNI
+ */
+u32
+lisp_gpe_tenant_find_or_create (u32 vni)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find (vni);
+
+ if (NULL == lt)
+ {
+ lt = lisp_gpe_tenant_find_or_create_i (vni);
+ }
+
+ return (lt - lisp_gpe_tenant_pool);
+}
+
+/**
+ * @brief If there are no more locks/users of te tenant, then delete it
+ */
+static void
+lisp_gpe_tenant_delete_if_empty (lisp_gpe_tenant_t * lt)
+{
+ int i;
+
+ for (i = 0; i < LISP_GPE_TENANT_LOCK_NUM; i++)
+ {
+ if (lt->lt_locks[i])
+ return;
+ }
+
+ hash_unset (lisp_gpe_tenant_db, lt->lt_vni);
+ pool_put (lisp_gpe_tenant_pool, lt);
+}
+
+/**
+ * @brief Add/create and lock a new or find and lock the existing L3
+ * interface for the tenant
+ *
+ * @paran vni The tenant's VNI
+ * @param table_id the Tenant's L3 table ID.
+ *
+ * @return the SW IF index of the L3 interface
+ */
+u32
+lisp_gpe_tenant_l3_iface_add_or_lock (u32 vni, u32 table_id)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find_or_create_i (vni);
+
+ if (~0 == lt->lt_table_id)
+ lt->lt_table_id = table_id;
+
+ ASSERT (lt->lt_table_id == table_id);
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
+ {
+ /* create the l3 interface since there are currently no users of it */
+ lt->lt_l3_sw_if_index =
+ lisp_gpe_add_l3_iface (&lisp_gpe_main, vni, table_id);
+ }
+
+ lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE]++;
+
+ return (lt->lt_l3_sw_if_index);
+}
+
+/**
+ * @brief Release the lock held on the tenant's L3 interface
+ */
+void
+lisp_gpe_tenant_l3_iface_unlock (u32 vni)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find (vni);
+
+ if (NULL == lt)
+ {
+ clib_warning ("No tenant for VNI %d", vni);
+ return;
+ }
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
+ {
+ clib_warning ("No L3 interface for tenant VNI %d", vni);
+ return;
+ }
+
+ lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE]--;
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
+ {
+ /* the last user has gone, so delete the l3 interface */
+ lisp_gpe_del_l3_iface (&lisp_gpe_main, vni, lt->lt_table_id);
+ }
+
+ /*
+ * If there are no more locks on any tenant managed resource, then
+ * this tenant is toast.
+ */
+ lisp_gpe_tenant_delete_if_empty (lt);
+}
+
+/**
+ * @brief Add/create and lock a new or find and lock the existing L2
+ * interface for the tenant
+ *
+ * @paran vni The tenant's VNI
+ * @param table_id the Tenant's L2 Bridge Domain ID.
+ *
+ * @return the SW IF index of the L2 interface
+ */
+u32
+lisp_gpe_tenant_l2_iface_add_or_lock (u32 vni, u32 bd_id)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find_or_create_i (vni);
+
+ if (NULL == lt)
+ {
+ clib_warning ("No tenant for VNI %d", vni);
+ return ~0;
+ }
+
+ if (~0 == lt->lt_bd_id)
+ lt->lt_bd_id = bd_id;
+
+ ASSERT (lt->lt_bd_id == bd_id);
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
+ {
+ /* create the l2 interface since there are currently no users of it */
+ lt->lt_l2_sw_if_index =
+ lisp_gpe_add_l2_iface (&lisp_gpe_main, vni, bd_id);
+ }
+
+ lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE]++;
+
+ return (lt->lt_l2_sw_if_index);
+}
+
+/**
+ * @brief Release the lock held on the tenant's L3 interface
+ */
+void
+lisp_gpe_tenant_l2_iface_unlock (u32 vni)
+{
+ lisp_gpe_tenant_t *lt;
+
+ lt = lisp_gpe_tenant_find (vni);
+
+ if (NULL == lt)
+ {
+ clib_warning ("No tenant for VNI %d", vni);
+ return;
+ }
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
+ {
+ clib_warning ("No L2 interface for tenant VNI %d", vni);
+ return;
+ }
+
+ lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE]--;
+
+ if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
+ {
+ /* the last user has gone, so delete the l2 interface */
+ lisp_gpe_del_l2_iface (&lisp_gpe_main, vni, lt->lt_bd_id);
+ }
+
+ /*
+ * If there are no more locks on any tenant managed resource, then
+ * this tenant is toast.
+ */
+ lisp_gpe_tenant_delete_if_empty (lt);
+}
+
+/**
+ * @brief get a const pointer to the tenant object
+ */
+const lisp_gpe_tenant_t *
+lisp_gpe_tenant_get (u32 index)
+{
+ return (pool_elt_at_index (lisp_gpe_tenant_pool, index));
+}
+
+/**
+ * @brief Flush/delete ALL the tenants
+ */
+void
+lisp_gpe_tenant_flush (void)
+{
+ lisp_gpe_tenant_t *lt;
+
+ /* *INDENT-OFF* */
+ pool_foreach(lt, lisp_gpe_tenant_pool,
+ ({
+ lisp_gpe_tenant_l2_iface_unlock(lt->lt_vni);
+ lisp_gpe_tenant_l3_iface_unlock(lt->lt_vni);
+ }));
+ /* *INDENT-ON* */
+}
+
+/**
+ * @brif Show/display one tenant
+ */
+static u8 *
+format_lisp_gpe_tenant (u8 * s, va_list ap)
+{
+ const lisp_gpe_tenant_t *lt = va_arg (ap, lisp_gpe_tenant_t *);
+
+ s = format (s, "VNI:%d ", lt->lt_vni);
+
+ if (lt->lt_table_id != ~0)
+ {
+ s = format (s, "VRF:%d ", lt->lt_table_id);
+ s = format (s, "L3-SW-IF:%d ", lt->lt_l3_sw_if_index);
+ }
+
+ if (lt->lt_bd_id != ~0)
+ {
+ s = format (s, "BD-ID:%d ", lt->lt_bd_id);
+ s = format (s, "L2-SW-IF:%d ", lt->lt_l2_sw_if_index);
+ }
+
+ return (s);
+}
+
+/**
+ * @brief CLI command to show LISP-GPE tenant.
+ */
+static clib_error_t *
+lisp_gpe_tenant_show (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ lisp_gpe_tenant_t *lt;
+
+ /* *INDENT-OFF* */
+ pool_foreach (lt, lisp_gpe_tenant_pool,
+ ({
+ vlib_cli_output (vm, "%U", format_lisp_gpe_tenant, lt);
+ }));
+ /* *INDENT-ON* */
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (lisp_gpe_tenant_command) = {
+ .path = "show lisp gpe tenant",
+ .short_help = "show lisp gpe tenant",
+ .function = lisp_gpe_tenant_show,
+};
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */