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
291
292
293
294
295
296
297
298
299
300
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/ethtool_netlink.h>
#include <net/udp_tunnel.h>
#include <net/vxlan.h>
#include "bitset.h"
#include "common.h"
#include "netlink.h"
const struct nla_policy ethnl_tunnel_info_get_policy[] = {
[ETHTOOL_A_TUNNEL_INFO_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static_assert(ETHTOOL_UDP_TUNNEL_TYPE_VXLAN == ilog2(UDP_TUNNEL_TYPE_VXLAN));
static_assert(ETHTOOL_UDP_TUNNEL_TYPE_GENEVE == ilog2(UDP_TUNNEL_TYPE_GENEVE));
static_assert(ETHTOOL_UDP_TUNNEL_TYPE_VXLAN_GPE ==
ilog2(UDP_TUNNEL_TYPE_VXLAN_GPE));
static ssize_t ethnl_udp_table_reply_size(unsigned int types, bool compact)
{
ssize_t size;
size = ethnl_bitset32_size(&types, NULL, __ETHTOOL_UDP_TUNNEL_TYPE_CNT,
udp_tunnel_type_names, compact);
if (size < 0)
return size;
return size +
nla_total_size(0) + /* _UDP_TABLE */
nla_total_size(sizeof(u32)); /* _UDP_TABLE_SIZE */
}
static ssize_t
ethnl_tunnel_info_reply_size(const struct ethnl_req_info *req_base,
struct netlink_ext_ack *extack)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct udp_tunnel_nic_info *info;
unsigned int i;
ssize_t ret;
size_t size;
info = req_base->dev->udp_tunnel_nic_info;
if (!info) {
NL_SET_ERR_MSG(extack,
"device does not report tunnel offload info");
return -EOPNOTSUPP;
}
size = nla_total_size(0); /* _INFO_UDP_PORTS */
for (i = 0; i < UDP_TUNNEL_NIC_MAX_TABLES; i++) {
if (!info->tables[i].n_entries)
break;
ret = ethnl_udp_table_reply_size(info->tables[i].tunnel_types,
compact);
if (ret < 0)
return ret;
size += ret;
size += udp_tunnel_nic_dump_size(req_base->dev, i);
}
if (info->flags & UDP_TUNNEL_NIC_INFO_STATIC_IANA_VXLAN) {
ret = ethnl_udp_table_reply_size(0, compact);
if (ret < 0)
return ret;
size += ret;
size += nla_total_size(0) + /* _TABLE_ENTRY */
nla_total_size(sizeof(__be16)) + /* _ENTRY_PORT */
nla_total_size(sizeof(u32)); /* _ENTRY_TYPE */
}
return size;
}
static int
ethnl_tunnel_info_fill_reply(const struct ethnl_req_info *req_base,
struct sk_buff *skb)
{
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
const struct udp_tunnel_nic_info *info;
struct nlattr *ports, *table, *entry;
unsigned int i;
info = req_base->dev->udp_tunnel_nic_info;
if (!info)
return -EOPNOTSUPP;
ports = nla_nest_start(skb, ETHTOOL_A_TUNNEL_INFO_UDP_PORTS);
if (!ports)
return -EMSGSIZE;
for (i = 0; i < UDP_TUNNEL_NIC_MAX_TABLES; i++) {
if (!info->tables[i].n_entries)
break;
table = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE);
if (!table)
goto err_cancel_ports;
if (nla_put_u32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE,
info->tables[i].n_entries))
goto err_cancel_table;
if (ethnl_put_bitset32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES,
&info->tables[i].tunnel_types, NULL,
__ETHTOOL_UDP_TUNNEL_TYPE_CNT,
udp_tunnel_type_names, compact))
goto err_cancel_table;
if (udp_tunnel_nic_dump_write(req_base->dev, i, skb))
goto err_cancel_table;
nla_nest_end(skb, table);
}
if (info->flags & UDP_TUNNEL_NIC_INFO_STATIC_IANA_VXLAN) {
u32 zero = 0;
table = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE);
if (!table)
goto err_cancel_ports;
if (nla_put_u32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_SIZE, 1))
goto err_cancel_table;
if (ethnl_put_bitset32(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES,
&zero, NULL,
__ETHTOOL_UDP_TUNNEL_TYPE_CNT,
udp_tunnel_type_names, compact))
goto err_cancel_table;
entry = nla_nest_start(skb, ETHTOOL_A_TUNNEL_UDP_TABLE_ENTRY);
if (!entry)
goto err_cancel_entry;
if (nla_put_be16(skb, ETHTOOL_A_TUNNEL_UDP_ENTRY_PORT,
htons(IANA_VXLAN_UDP_PORT)) ||
nla_put_u32(skb, ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE,
ilog2(UDP_TUNNEL_TYPE_VXLAN)))
goto err_cancel_entry;
nla_nest_end(skb, entry);
nla_nest_end(skb, table);
}
nla_nest_end(skb, ports);
return 0;
err_cancel_entry:
nla_nest_cancel(skb, entry);
err_cancel_table:
nla_nest_cancel(skb, table);
err_cancel_ports:
nla_nest_cancel(skb, ports);
return -EMSGSIZE;
}
int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info)
{
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct sk_buff *rskb;
void *reply_payload;
int reply_len;
int ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
rtnl_lock();
ret = ethnl_tunnel_info_reply_size(&req_info, info->extack);
if (ret < 0)
goto err_unlock_rtnl;
reply_len = ret + ethnl_reply_header_size();
rskb = ethnl_reply_init(reply_len, req_info.dev,
ETHTOOL_MSG_TUNNEL_INFO_GET_REPLY,
ETHTOOL_A_TUNNEL_INFO_HEADER,
info, &reply_payload);
if (!rskb) {
ret = -ENOMEM;
goto err_unlock_rtnl;
}
ret = ethnl_tunnel_info_fill_reply(&req_info, rskb);
if (ret)
goto err_free_msg;
rtnl_unlock();
ethnl_parse_header_dev_put(&req_info);
genlmsg_end(rskb, reply_payload);
return genlmsg_reply(rskb, info);
err_free_msg:
nlmsg_free(rskb);
err_unlock_rtnl:
rtnl_unlock();
ethnl_parse_header_dev_put(&req_info);
return ret;
}
struct ethnl_tunnel_info_dump_ctx {
struct ethnl_req_info req_info;
int pos_hash;
int pos_idx;
};
int ethnl_tunnel_info_start(struct netlink_callback *cb)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
struct ethnl_tunnel_info_dump_ctx *ctx = (void *)cb->ctx;
struct nlattr **tb = info->attrs;
int ret;
BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
memset(ctx, 0, sizeof(*ctx));
ret = ethnl_parse_header_dev_get(&ctx->req_info,
tb[ETHTOOL_A_TUNNEL_INFO_HEADER],
sock_net(cb->skb->sk), cb->extack,
false);
if (ctx->req_info.dev) {
ethnl_parse_header_dev_put(&ctx->req_info);
ctx->req_info.dev = NULL;
}
return ret;
}
int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ethnl_tunnel_info_dump_ctx *ctx = (void *)cb->ctx;
struct net *net = sock_net(skb->sk);
int s_idx = ctx->pos_idx;
int h, idx = 0;
int ret = 0;
void *ehdr;
rtnl_lock();
cb->seq = net->dev_base_seq;
for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
struct hlist_head *head;
struct net_device *dev;
head = &net->dev_index_head[h];
idx = 0;
hlist_for_each_entry(dev, head, index_hlist) {
if (idx < s_idx)
goto cont;
ehdr = ethnl_dump_put(skb, cb,
ETHTOOL_MSG_TUNNEL_INFO_GET_REPLY);
if (!ehdr) {
ret = -EMSGSIZE;
goto out;
}
ret = ethnl_fill_reply_header(skb, dev, ETHTOOL_A_TUNNEL_INFO_HEADER);
if (ret < 0) {
genlmsg_cancel(skb, ehdr);
goto out;
}
ctx->req_info.dev = dev;
ret = ethnl_tunnel_info_fill_reply(&ctx->req_info, skb);
ctx->req_info.dev = NULL;
if (ret < 0) {
genlmsg_cancel(skb, ehdr);
if (ret == -EOPNOTSUPP)
goto cont;
goto out;
}
genlmsg_end(skb, ehdr);
cont:
idx++;
}
}
out:
rtnl_unlock();
ctx->pos_hash = h;
ctx->pos_idx = idx;
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
if (ret == -EMSGSIZE && skb->len)
return skb->len;
return ret;
}
|
