71 static __always_inline int send_icmp4_too_big(struct xdp_md *xdp)  in send_icmp4_too_big()  argument
75 	if (bpf_xdp_adjust_head(xdp, 0 - headroom))  in send_icmp4_too_big()
77 	void *data = (void *)(long)xdp->data;  in send_icmp4_too_big()
78 	void *data_end = (void *)(long)xdp->data_end;  in send_icmp4_too_big()
121 static __always_inline int handle_ipv4(struct xdp_md *xdp)  in handle_ipv4()  argument
123 	void *data_end = (void *)(long)xdp->data_end;  in handle_ipv4()
124 	void *data = (void *)(long)xdp->data;  in handle_ipv4()
130 		if (bpf_xdp_adjust_tail(xdp, 0 - offset))  in handle_ipv4()
132 		return send_icmp4_too_big(xdp);  in handle_ipv4()
138 int _xdp_icmp(struct xdp_md *xdp)  in _xdp_icmp()  argument
140 	void *data_end = (void *)(long)xdp->data_end;  in _xdp_icmp()
141 	void *data = (void *)(long)xdp->data;  in _xdp_icmp()
151 		return handle_ipv4(xdp);  in _xdp_icmp()