1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /* Copyright (c) 2017-2020 Mellanox Technologies. All rights reserved */
4 #include <linux/kernel.h>
5 #include <linux/slab.h>
6 #include <linux/errno.h>
7 #include <linux/list.h>
8 #include <net/net_namespace.h>
12 struct mlxsw_sp_flow_block *
13 mlxsw_sp_flow_block_create(struct mlxsw_sp *mlxsw_sp, struct net *net)
15 struct mlxsw_sp_flow_block *block;
17 block = kzalloc(sizeof(*block), GFP_KERNEL);
20 INIT_LIST_HEAD(&block->binding_list);
21 INIT_LIST_HEAD(&block->mall.list);
22 block->mlxsw_sp = mlxsw_sp;
27 void mlxsw_sp_flow_block_destroy(struct mlxsw_sp_flow_block *block)
29 WARN_ON(!list_empty(&block->binding_list));
33 static struct mlxsw_sp_flow_block_binding *
34 mlxsw_sp_flow_block_lookup(struct mlxsw_sp_flow_block *block,
35 struct mlxsw_sp_port *mlxsw_sp_port, bool ingress)
37 struct mlxsw_sp_flow_block_binding *binding;
39 list_for_each_entry(binding, &block->binding_list, list)
40 if (binding->mlxsw_sp_port == mlxsw_sp_port &&
41 binding->ingress == ingress)
47 mlxsw_sp_flow_block_ruleset_bound(const struct mlxsw_sp_flow_block *block)
49 return block->ruleset_zero;
52 static int mlxsw_sp_flow_block_bind(struct mlxsw_sp *mlxsw_sp,
53 struct mlxsw_sp_flow_block *block,
54 struct mlxsw_sp_port *mlxsw_sp_port,
56 struct netlink_ext_ack *extack)
58 struct mlxsw_sp_flow_block_binding *binding;
61 if (WARN_ON(mlxsw_sp_flow_block_lookup(block, mlxsw_sp_port, ingress)))
64 if (ingress && block->ingress_blocker_rule_count) {
65 NL_SET_ERR_MSG_MOD(extack, "Block cannot be bound to ingress because it contains unsupported rules");
69 if (!ingress && block->egress_blocker_rule_count) {
70 NL_SET_ERR_MSG_MOD(extack, "Block cannot be bound to egress because it contains unsupported rules");
74 err = mlxsw_sp_mall_port_bind(block, mlxsw_sp_port, extack);
78 binding = kzalloc(sizeof(*binding), GFP_KERNEL);
81 goto err_binding_alloc;
83 binding->mlxsw_sp_port = mlxsw_sp_port;
84 binding->ingress = ingress;
86 if (mlxsw_sp_flow_block_ruleset_bound(block)) {
87 err = mlxsw_sp_acl_ruleset_bind(mlxsw_sp, block, binding);
89 goto err_ruleset_bind;
93 block->ingress_binding_count++;
95 block->egress_binding_count++;
96 list_add(&binding->list, &block->binding_list);
102 mlxsw_sp_mall_port_unbind(block, mlxsw_sp_port);
107 static int mlxsw_sp_flow_block_unbind(struct mlxsw_sp *mlxsw_sp,
108 struct mlxsw_sp_flow_block *block,
109 struct mlxsw_sp_port *mlxsw_sp_port,
112 struct mlxsw_sp_flow_block_binding *binding;
114 binding = mlxsw_sp_flow_block_lookup(block, mlxsw_sp_port, ingress);
118 list_del(&binding->list);
121 block->ingress_binding_count--;
123 block->egress_binding_count--;
125 if (mlxsw_sp_flow_block_ruleset_bound(block))
126 mlxsw_sp_acl_ruleset_unbind(mlxsw_sp, block, binding);
130 mlxsw_sp_mall_port_unbind(block, mlxsw_sp_port);
135 static int mlxsw_sp_flow_block_mall_cb(struct mlxsw_sp_flow_block *flow_block,
136 struct tc_cls_matchall_offload *f)
138 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_flow_block_mlxsw_sp(flow_block);
140 switch (f->command) {
141 case TC_CLSMATCHALL_REPLACE:
142 return mlxsw_sp_mall_replace(mlxsw_sp, flow_block, f);
143 case TC_CLSMATCHALL_DESTROY:
144 mlxsw_sp_mall_destroy(flow_block, f);
151 static int mlxsw_sp_flow_block_flower_cb(struct mlxsw_sp_flow_block *flow_block,
152 struct flow_cls_offload *f)
154 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_flow_block_mlxsw_sp(flow_block);
156 switch (f->command) {
157 case FLOW_CLS_REPLACE:
158 return mlxsw_sp_flower_replace(mlxsw_sp, flow_block, f);
159 case FLOW_CLS_DESTROY:
160 mlxsw_sp_flower_destroy(mlxsw_sp, flow_block, f);
163 return mlxsw_sp_flower_stats(mlxsw_sp, flow_block, f);
164 case FLOW_CLS_TMPLT_CREATE:
165 return mlxsw_sp_flower_tmplt_create(mlxsw_sp, flow_block, f);
166 case FLOW_CLS_TMPLT_DESTROY:
167 mlxsw_sp_flower_tmplt_destroy(mlxsw_sp, flow_block, f);
174 static int mlxsw_sp_flow_block_cb(enum tc_setup_type type,
175 void *type_data, void *cb_priv)
177 struct mlxsw_sp_flow_block *flow_block = cb_priv;
179 if (mlxsw_sp_flow_block_disabled(flow_block))
183 case TC_SETUP_CLSMATCHALL:
184 return mlxsw_sp_flow_block_mall_cb(flow_block, type_data);
185 case TC_SETUP_CLSFLOWER:
186 return mlxsw_sp_flow_block_flower_cb(flow_block, type_data);
192 static void mlxsw_sp_tc_block_release(void *cb_priv)
194 struct mlxsw_sp_flow_block *flow_block = cb_priv;
196 mlxsw_sp_flow_block_destroy(flow_block);
199 static LIST_HEAD(mlxsw_sp_block_cb_list);
201 static int mlxsw_sp_setup_tc_block_bind(struct mlxsw_sp_port *mlxsw_sp_port,
202 struct flow_block_offload *f,
205 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
206 struct mlxsw_sp_flow_block *flow_block;
207 struct flow_block_cb *block_cb;
208 bool register_block = false;
211 block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_flow_block_cb,
214 flow_block = mlxsw_sp_flow_block_create(mlxsw_sp, f->net);
217 block_cb = flow_block_cb_alloc(mlxsw_sp_flow_block_cb,
218 mlxsw_sp, flow_block,
219 mlxsw_sp_tc_block_release);
220 if (IS_ERR(block_cb)) {
221 mlxsw_sp_flow_block_destroy(flow_block);
222 return PTR_ERR(block_cb);
224 register_block = true;
226 flow_block = flow_block_cb_priv(block_cb);
228 flow_block_cb_incref(block_cb);
229 err = mlxsw_sp_flow_block_bind(mlxsw_sp, flow_block,
230 mlxsw_sp_port, ingress, f->extack);
235 mlxsw_sp_port->ing_flow_block = flow_block;
237 mlxsw_sp_port->eg_flow_block = flow_block;
239 if (register_block) {
240 flow_block_cb_add(block_cb, f);
241 list_add_tail(&block_cb->driver_list, &mlxsw_sp_block_cb_list);
247 if (!flow_block_cb_decref(block_cb))
248 flow_block_cb_free(block_cb);
252 static void mlxsw_sp_setup_tc_block_unbind(struct mlxsw_sp_port *mlxsw_sp_port,
253 struct flow_block_offload *f,
256 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
257 struct mlxsw_sp_flow_block *flow_block;
258 struct flow_block_cb *block_cb;
261 block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_flow_block_cb,
267 mlxsw_sp_port->ing_flow_block = NULL;
269 mlxsw_sp_port->eg_flow_block = NULL;
271 flow_block = flow_block_cb_priv(block_cb);
272 err = mlxsw_sp_flow_block_unbind(mlxsw_sp, flow_block,
273 mlxsw_sp_port, ingress);
274 if (!err && !flow_block_cb_decref(block_cb)) {
275 flow_block_cb_remove(block_cb, f);
276 list_del(&block_cb->driver_list);
280 int mlxsw_sp_setup_tc_block_clsact(struct mlxsw_sp_port *mlxsw_sp_port,
281 struct flow_block_offload *f,
284 f->driver_block_list = &mlxsw_sp_block_cb_list;
286 switch (f->command) {
287 case FLOW_BLOCK_BIND:
288 return mlxsw_sp_setup_tc_block_bind(mlxsw_sp_port, f, ingress);
289 case FLOW_BLOCK_UNBIND:
290 mlxsw_sp_setup_tc_block_unbind(mlxsw_sp_port, f, ingress);