seg6_local.c (0a3021f1d4e553d9f3e7fc20e994b91af0687eb4) seg6_local.c (cfdf64a03406351a9d6c1fe568a141a9a85d4710)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SR-IPv6 implementation
4 *
5 * Authors:
6 * David Lebrun <david.lebrun@uclouvain.be>
7 * eBPF support: Mathieu Xhonneux <m.xhonneux@gmail.com>
8 */

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28#include <net/seg6_hmac.h>
29#endif
30#include <net/seg6_local.h>
31#include <linux/etherdevice.h>
32#include <linux/bpf.h>
33
34struct seg6_local_lwt;
35
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SR-IPv6 implementation
4 *
5 * Authors:
6 * David Lebrun <david.lebrun@uclouvain.be>
7 * eBPF support: Mathieu Xhonneux <m.xhonneux@gmail.com>
8 */

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28#include <net/seg6_hmac.h>
29#endif
30#include <net/seg6_local.h>
31#include <linux/etherdevice.h>
32#include <linux/bpf.h>
33
34struct seg6_local_lwt;
35
36/* callbacks used for customizing the creation and destruction of a behavior */
37struct seg6_local_lwtunnel_ops {
38 int (*build_state)(struct seg6_local_lwt *slwt, const void *cfg,
39 struct netlink_ext_ack *extack);
40 void (*destroy_state)(struct seg6_local_lwt *slwt);
41};
42
36struct seg6_action_desc {
37 int action;
38 unsigned long attrs;
39
40 /* The optattrs field is used for specifying all the optional
41 * attributes supported by a specific behavior.
42 * It means that if one of these attributes is not provided in the
43 * netlink message during the behavior creation, no errors will be

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48 * Every user MUST obey to this rule! If you set an attribute as
49 * required the same attribute CANNOT be set as optional and vice
50 * versa.
51 */
52 unsigned long optattrs;
53
54 int (*input)(struct sk_buff *skb, struct seg6_local_lwt *slwt);
55 int static_headroom;
43struct seg6_action_desc {
44 int action;
45 unsigned long attrs;
46
47 /* The optattrs field is used for specifying all the optional
48 * attributes supported by a specific behavior.
49 * It means that if one of these attributes is not provided in the
50 * netlink message during the behavior creation, no errors will be

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55 * Every user MUST obey to this rule! If you set an attribute as
56 * required the same attribute CANNOT be set as optional and vice
57 * versa.
58 */
59 unsigned long optattrs;
60
61 int (*input)(struct sk_buff *skb, struct seg6_local_lwt *slwt);
62 int static_headroom;
63
64 struct seg6_local_lwtunnel_ops slwt_ops;
56};
57
58struct bpf_lwt_prog {
59 struct bpf_prog *prog;
60 char *name;
61};
62
63struct seg6_local_lwt {

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1050 return 0;
1051
1052parse_optattrs_err:
1053 __destroy_attrs(parsed_optattrs, i, slwt);
1054
1055 return err;
1056}
1057
65};
66
67struct bpf_lwt_prog {
68 struct bpf_prog *prog;
69 char *name;
70};
71
72struct seg6_local_lwt {

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1059 return 0;
1060
1061parse_optattrs_err:
1062 __destroy_attrs(parsed_optattrs, i, slwt);
1063
1064 return err;
1065}
1066
1067/* call the custom constructor of the behavior during its initialization phase
1068 * and after that all its attributes have been parsed successfully.
1069 */
1070static int
1071seg6_local_lwtunnel_build_state(struct seg6_local_lwt *slwt, const void *cfg,
1072 struct netlink_ext_ack *extack)
1073{
1074 struct seg6_action_desc *desc = slwt->desc;
1075 struct seg6_local_lwtunnel_ops *ops;
1076
1077 ops = &desc->slwt_ops;
1078 if (!ops->build_state)
1079 return 0;
1080
1081 return ops->build_state(slwt, cfg, extack);
1082}
1083
1084/* call the custom destructor of the behavior which is invoked before the
1085 * tunnel is going to be destroyed.
1086 */
1087static void seg6_local_lwtunnel_destroy_state(struct seg6_local_lwt *slwt)
1088{
1089 struct seg6_action_desc *desc = slwt->desc;
1090 struct seg6_local_lwtunnel_ops *ops;
1091
1092 ops = &desc->slwt_ops;
1093 if (!ops->destroy_state)
1094 return;
1095
1096 ops->destroy_state(slwt);
1097}
1098
1058static int parse_nla_action(struct nlattr **attrs, struct seg6_local_lwt *slwt)
1059{
1060 struct seg6_action_param *param;
1061 struct seg6_action_desc *desc;
1062 unsigned long invalid_attrs;
1063 int i, err;
1064
1065 desc = __get_action_desc(slwt->action);

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1149
1150 slwt = seg6_local_lwtunnel(newts);
1151 slwt->action = nla_get_u32(tb[SEG6_LOCAL_ACTION]);
1152
1153 err = parse_nla_action(tb, slwt);
1154 if (err < 0)
1155 goto out_free;
1156
1099static int parse_nla_action(struct nlattr **attrs, struct seg6_local_lwt *slwt)
1100{
1101 struct seg6_action_param *param;
1102 struct seg6_action_desc *desc;
1103 unsigned long invalid_attrs;
1104 int i, err;
1105
1106 desc = __get_action_desc(slwt->action);

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1190
1191 slwt = seg6_local_lwtunnel(newts);
1192 slwt->action = nla_get_u32(tb[SEG6_LOCAL_ACTION]);
1193
1194 err = parse_nla_action(tb, slwt);
1195 if (err < 0)
1196 goto out_free;
1197
1198 err = seg6_local_lwtunnel_build_state(slwt, cfg, extack);
1199 if (err < 0)
1200 goto out_destroy_attrs;
1201
1157 newts->type = LWTUNNEL_ENCAP_SEG6_LOCAL;
1158 newts->flags = LWTUNNEL_STATE_INPUT_REDIRECT;
1159 newts->headroom = slwt->headroom;
1160
1161 *ts = newts;
1162
1163 return 0;
1164
1202 newts->type = LWTUNNEL_ENCAP_SEG6_LOCAL;
1203 newts->flags = LWTUNNEL_STATE_INPUT_REDIRECT;
1204 newts->headroom = slwt->headroom;
1205
1206 *ts = newts;
1207
1208 return 0;
1209
1210out_destroy_attrs:
1211 destroy_attrs(slwt);
1165out_free:
1166 kfree(newts);
1167 return err;
1168}
1169
1170static void seg6_local_destroy_state(struct lwtunnel_state *lwt)
1171{
1172 struct seg6_local_lwt *slwt = seg6_local_lwtunnel(lwt);
1173
1212out_free:
1213 kfree(newts);
1214 return err;
1215}
1216
1217static void seg6_local_destroy_state(struct lwtunnel_state *lwt)
1218{
1219 struct seg6_local_lwt *slwt = seg6_local_lwtunnel(lwt);
1220
1221 seg6_local_lwtunnel_destroy_state(slwt);
1222
1174 destroy_attrs(slwt);
1175
1176 return;
1177}
1178
1179static int seg6_local_fill_encap(struct sk_buff *skb,
1180 struct lwtunnel_state *lwt)
1181{

--- 109 unchanged lines hidden --- 		1223 destroy_attrs(slwt);
1224
1225 return;
1226}
1227
1228static int seg6_local_fill_encap(struct sk_buff *skb,
1229 struct lwtunnel_state *lwt)
1230{

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