This source file includes following definitions.
- seg6_lwt_headroom
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15 #ifndef _UAPI_LINUX_SEG6_IPTUNNEL_H
16 #define _UAPI_LINUX_SEG6_IPTUNNEL_H
17
18 #include <linux/seg6.h>
19
20 enum {
21 SEG6_IPTUNNEL_UNSPEC,
22 SEG6_IPTUNNEL_SRH,
23 __SEG6_IPTUNNEL_MAX,
24 };
25 #define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1)
26
27 struct seg6_iptunnel_encap {
28 int mode;
29 struct ipv6_sr_hdr srh[0];
30 };
31
32 #define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3))
33
34 enum {
35 SEG6_IPTUN_MODE_INLINE,
36 SEG6_IPTUN_MODE_ENCAP,
37 SEG6_IPTUN_MODE_L2ENCAP,
38 };
39
40 #ifdef __KERNEL__
41
42 static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo)
43 {
44 int head = 0;
45
46 switch (tuninfo->mode) {
47 case SEG6_IPTUN_MODE_INLINE:
48 break;
49 case SEG6_IPTUN_MODE_ENCAP:
50 head = sizeof(struct ipv6hdr);
51 break;
52 case SEG6_IPTUN_MODE_L2ENCAP:
53 return 0;
54 }
55
56 return ((tuninfo->srh->hdrlen + 1) << 3) + head;
57 }
58
59 #endif
60
61 #endif