606 void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,  in skb_add_rx_frag()  argument
609 	skb_fill_page_desc(skb, i, page, off, size);  in skb_add_rx_frag()
1558 void skb_headers_offset_update(struct sk_buff *skb, int off)  in skb_headers_offset_update()  argument
1562 		skb->csum_start += off;  in skb_headers_offset_update()
1564 	skb->transport_header += off;  in skb_headers_offset_update()
1565 	skb->network_header   += off;  in skb_headers_offset_update()
1567 		skb->mac_header += off;  in skb_headers_offset_update()
1568 	skb->inner_transport_header += off;  in skb_headers_offset_update()
1569 	skb->inner_network_header += off;  in skb_headers_offset_update()
1570 	skb->inner_mac_header += off;  in skb_headers_offset_update()
1716 	long off;  in pskb_expand_head()  local
1762 	off = (data + nhead) - skb->head;  in pskb_expand_head()
1766 	skb->data    += off;  in pskb_expand_head()
1770 	off           = nhead;  in pskb_expand_head()
1772 	skb->tail	      += off;  in pskb_expand_head()
2525 			     unsigned int plen, unsigned int *off,  in __splice_segment()  argument
2535 	if (*off >= plen) {  in __splice_segment()
2536 		*off -= plen;  in __splice_segment()
2541 	poff += *off;  in __splice_segment()
2542 	plen -= *off;  in __splice_segment()
2543 	*off = 0;  in __splice_segment()
5069 bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)  in skb_partial_csum_set()  argument
5071 	u32 csum_end = (u32)start + (u32)off + sizeof(__sum16);  in skb_partial_csum_set()
5076 				     start, off, skb_headroom(skb), skb_headlen(skb));  in skb_partial_csum_set()
5081 	skb->csum_offset = off;  in skb_partial_csum_set()
5112 				      unsigned int off)  in skb_checksum_setup_ip()  argument
5118 		err = skb_maybe_pull_tail(skb, off + sizeof(struct tcphdr),  in skb_checksum_setup_ip()
5119 					  off + MAX_TCP_HDR_LEN);  in skb_checksum_setup_ip()
5120 		if (!err && !skb_partial_csum_set(skb, off,  in skb_checksum_setup_ip()
5127 		err = skb_maybe_pull_tail(skb, off + sizeof(struct udphdr),  in skb_checksum_setup_ip()
5128 					  off + sizeof(struct udphdr));  in skb_checksum_setup_ip()
5129 		if (!err && !skb_partial_csum_set(skb, off,  in skb_checksum_setup_ip()
5146 	unsigned int off;  in skb_checksum_setup_ipv4()  local
5162 	off = ip_hdrlen(skb);  in skb_checksum_setup_ipv4()
5169 	csum = skb_checksum_setup_ip(skb, ip_hdr(skb)->protocol, off);  in skb_checksum_setup_ipv4()
5176 					   skb->len - off,  in skb_checksum_setup_ipv4()
5189 #define OPT_HDR(type, skb, off) \  argument
5190 	(type *)(skb_network_header(skb) + (off))
5196 	unsigned int off;  in skb_checksum_setup_ipv6()  local
5205 	off = sizeof(struct ipv6hdr);  in skb_checksum_setup_ipv6()
5207 	err = skb_maybe_pull_tail(skb, off, MAX_IPV6_HDR_LEN);  in skb_checksum_setup_ipv6()
5214 	while (off <= len && !done) {  in skb_checksum_setup_ipv6()
5222 						  off +  in skb_checksum_setup_ipv6()
5228 			hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);  in skb_checksum_setup_ipv6()
5230 			off += ipv6_optlen(hp);  in skb_checksum_setup_ipv6()
5237 						  off +  in skb_checksum_setup_ipv6()
5243 			hp = OPT_HDR(struct ip_auth_hdr, skb, off);  in skb_checksum_setup_ipv6()
5245 			off += ipv6_authlen(hp);  in skb_checksum_setup_ipv6()
5252 						  off +  in skb_checksum_setup_ipv6()
5258 			hp = OPT_HDR(struct frag_hdr, skb, off);  in skb_checksum_setup_ipv6()
5264 			off += sizeof(struct frag_hdr);  in skb_checksum_setup_ipv6()
5278 	csum = skb_checksum_setup_ip(skb, nexthdr, off);  in skb_checksum_setup_ipv6()
5285 					 skb->len - off, nexthdr, 0);  in skb_checksum_setup_ipv6()
6199 static int pskb_carve_inside_header(struct sk_buff *skb, const u32 off,  in pskb_carve_inside_header()  argument
6204 	int new_hlen = headlen - off;  in pskb_carve_inside_header()
6220 	skb_copy_from_linear_data_offset(skb, off, data, new_hlen);  in pskb_carve_inside_header()
6221 	skb->len -= off;  in pskb_carve_inside_header()
6259 static int pskb_carve(struct sk_buff *skb, const u32 off, gfp_t gfp);
6318 static int pskb_carve_inside_nonlinear(struct sk_buff *skb, const u32 off,  in pskb_carve_inside_nonlinear()  argument
6349 		if (pos + fsize > off) {  in pskb_carve_inside_nonlinear()
6352 			if (pos < off) {  in pskb_carve_inside_nonlinear()
6361 				skb_frag_off_add(&shinfo->frags[0], off - pos);  in pskb_carve_inside_nonlinear()
6362 				skb_frag_size_sub(&shinfo->frags[0], off - pos);  in pskb_carve_inside_nonlinear()
6374 	if (k == 0 && pskb_carve_frag_list(skb, shinfo, off - pos, gfp_mask)) {  in pskb_carve_inside_nonlinear()
6392 	skb->len -= off;  in pskb_carve_inside_nonlinear()
6412 struct sk_buff *pskb_extract(struct sk_buff *skb, int off,  in pskb_extract()  argument
6420 	if (pskb_carve(clone, off, gfp) < 0 ||  in pskb_extract()