1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2020 Marvell International Ltd. All rights reserved */
#include <linux/kernel.h>
#include <linux/list.h>
#include "prestera.h"
#include "prestera_acl.h"
#include "prestera_flow.h"
#include "prestera_span.h"
#include "prestera_flower.h"
static LIST_HEAD(prestera_block_cb_list);
static int prestera_flow_block_mall_cb(struct prestera_flow_block *block,
struct tc_cls_matchall_offload *f)
{
switch (f->command) {
case TC_CLSMATCHALL_REPLACE:
return prestera_span_replace(block, f);
case TC_CLSMATCHALL_DESTROY:
prestera_span_destroy(block);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int prestera_flow_block_flower_cb(struct prestera_flow_block *block,
struct flow_cls_offload *f)
{
if (f->common.chain_index != 0)
return -EOPNOTSUPP;
switch (f->command) {
case FLOW_CLS_REPLACE:
return prestera_flower_replace(block, f);
case FLOW_CLS_DESTROY:
prestera_flower_destroy(block, f);
return 0;
case FLOW_CLS_STATS:
return prestera_flower_stats(block, f);
case FLOW_CLS_TMPLT_CREATE:
return prestera_flower_tmplt_create(block, f);
case FLOW_CLS_TMPLT_DESTROY:
prestera_flower_tmplt_destroy(block, f);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int prestera_flow_block_cb(enum tc_setup_type type,
void *type_data, void *cb_priv)
{
struct prestera_flow_block *block = cb_priv;
switch (type) {
case TC_SETUP_CLSFLOWER:
return prestera_flow_block_flower_cb(block, type_data);
case TC_SETUP_CLSMATCHALL:
return prestera_flow_block_mall_cb(block, type_data);
default:
return -EOPNOTSUPP;
}
}
static void prestera_flow_block_destroy(void *cb_priv)
{
struct prestera_flow_block *block = cb_priv;
prestera_flower_template_cleanup(block);
WARN_ON(!list_empty(&block->binding_list));
kfree(block);
}
static struct prestera_flow_block *
prestera_flow_block_create(struct prestera_switch *sw, struct net *net)
{
struct prestera_flow_block *block;
block = kzalloc(sizeof(*block), GFP_KERNEL);
if (!block)
return NULL;
INIT_LIST_HEAD(&block->binding_list);
block->net = net;
block->sw = sw;
return block;
}
static void prestera_flow_block_release(void *cb_priv)
{
struct prestera_flow_block *block = cb_priv;
prestera_flow_block_destroy(block);
}
static bool
prestera_flow_block_is_bound(const struct prestera_flow_block *block)
{
return block->ruleset_zero;
}
static struct prestera_flow_block_binding *
prestera_flow_block_lookup(struct prestera_flow_block *block,
struct prestera_port *port)
{
struct prestera_flow_block_binding *binding;
list_for_each_entry(binding, &block->binding_list, list)
if (binding->port == port)
return binding;
return NULL;
}
static int prestera_flow_block_bind(struct prestera_flow_block *block,
struct prestera_port *port)
{
struct prestera_flow_block_binding *binding;
int err;
binding = kzalloc(sizeof(*binding), GFP_KERNEL);
if (!binding)
return -ENOMEM;
binding->span_id = PRESTERA_SPAN_INVALID_ID;
binding->port = port;
if (prestera_flow_block_is_bound(block)) {
err = prestera_acl_ruleset_bind(block->ruleset_zero, port);
if (err)
goto err_ruleset_bind;
}
list_add(&binding->list, &block->binding_list);
return 0;
err_ruleset_bind:
kfree(binding);
return err;
}
static int prestera_flow_block_unbind(struct prestera_flow_block *block,
struct prestera_port *port)
{
struct prestera_flow_block_binding *binding;
binding = prestera_flow_block_lookup(block, port);
if (!binding)
return -ENOENT;
list_del(&binding->list);
if (prestera_flow_block_is_bound(block))
prestera_acl_ruleset_unbind(block->ruleset_zero, port);
kfree(binding);
return 0;
}
static struct prestera_flow_block *
prestera_flow_block_get(struct prestera_switch *sw,
struct flow_block_offload *f,
bool *register_block)
{
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
block_cb = flow_block_cb_lookup(f->block,
prestera_flow_block_cb, sw);
if (!block_cb) {
block = prestera_flow_block_create(sw, f->net);
if (!block)
return ERR_PTR(-ENOMEM);
block_cb = flow_block_cb_alloc(prestera_flow_block_cb,
sw, block,
prestera_flow_block_release);
if (IS_ERR(block_cb)) {
prestera_flow_block_destroy(block);
return ERR_CAST(block_cb);
}
block->block_cb = block_cb;
*register_block = true;
} else {
block = flow_block_cb_priv(block_cb);
*register_block = false;
}
flow_block_cb_incref(block_cb);
return block;
}
static void prestera_flow_block_put(struct prestera_flow_block *block)
{
struct flow_block_cb *block_cb = block->block_cb;
if (flow_block_cb_decref(block_cb))
return;
flow_block_cb_free(block_cb);
prestera_flow_block_destroy(block);
}
static int prestera_setup_flow_block_bind(struct prestera_port *port,
struct flow_block_offload *f)
{
struct prestera_switch *sw = port->sw;
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
bool register_block;
int err;
block = prestera_flow_block_get(sw, f, ®ister_block);
if (IS_ERR(block))
return PTR_ERR(block);
block_cb = block->block_cb;
err = prestera_flow_block_bind(block, port);
if (err)
goto err_block_bind;
if (register_block) {
flow_block_cb_add(block_cb, f);
list_add_tail(&block_cb->driver_list, &prestera_block_cb_list);
}
port->flow_block = block;
return 0;
err_block_bind:
prestera_flow_block_put(block);
return err;
}
static void prestera_setup_flow_block_unbind(struct prestera_port *port,
struct flow_block_offload *f)
{
struct prestera_switch *sw = port->sw;
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
int err;
block_cb = flow_block_cb_lookup(f->block, prestera_flow_block_cb, sw);
if (!block_cb)
return;
block = flow_block_cb_priv(block_cb);
prestera_span_destroy(block);
err = prestera_flow_block_unbind(block, port);
if (err)
goto error;
if (!flow_block_cb_decref(block_cb)) {
flow_block_cb_remove(block_cb, f);
list_del(&block_cb->driver_list);
}
error:
port->flow_block = NULL;
}
int prestera_flow_block_setup(struct prestera_port *port,
struct flow_block_offload *f)
{
if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
return -EOPNOTSUPP;
f->driver_block_list = &prestera_block_cb_list;
switch (f->command) {
case FLOW_BLOCK_BIND:
return prestera_setup_flow_block_bind(port, f);
case FLOW_BLOCK_UNBIND:
prestera_setup_flow_block_unbind(port, f);
return 0;
default:
return -EOPNOTSUPP;
}
}
|
