79 static struct cfpkt *cfpkt_create_pfx(u16 len, u16 pfx)  in cfpkt_create_pfx()  argument
83 	skb = alloc_skb(len + pfx, GFP_ATOMIC);  in cfpkt_create_pfx()
91 inline struct cfpkt *cfpkt_create(u16 len)  in cfpkt_create()  argument
93 	return cfpkt_create_pfx(len + PKT_POSTFIX, PKT_PREFIX);  in cfpkt_create()
105 	return skb->len > 0;  in cfpkt_more()
108 int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_peek_head()  argument
111 	if (skb_headlen(skb) >= len) {  in cfpkt_peek_head()
112 		memcpy(data, skb->data, len);  in cfpkt_peek_head()
115 	return !cfpkt_extr_head(pkt, data, len) &&  in cfpkt_peek_head()
116 	    !cfpkt_add_head(pkt, data, len);  in cfpkt_peek_head()
119 int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_extr_head()  argument
126 	if (unlikely(len > skb->len)) {  in cfpkt_extr_head()
131 	if (unlikely(len > skb_headlen(skb))) {  in cfpkt_extr_head()
137 	from = skb_pull(skb, len);  in cfpkt_extr_head()
138 	from -= len;  in cfpkt_extr_head()
140 		memcpy(data, from, len);  in cfpkt_extr_head()
145 int cfpkt_extr_trail(struct cfpkt *pkt, void *dta, u16 len)  in cfpkt_extr_trail()  argument
157 	if (unlikely(skb->data + len > skb_tail_pointer(skb))) {  in cfpkt_extr_trail()
161 	from = skb_tail_pointer(skb) - len;  in cfpkt_extr_trail()
162 	skb_trim(skb, skb->len - len);  in cfpkt_extr_trail()
163 	memcpy(data, from, len);  in cfpkt_extr_trail()
167 int cfpkt_pad_trail(struct cfpkt *pkt, u16 len)  in cfpkt_pad_trail()  argument
169 	return cfpkt_add_body(pkt, NULL, len);  in cfpkt_pad_trail()
172 int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_body()  argument
186 	if (unlikely(skb_tailroom(skb) < len)) {  in cfpkt_add_body()
187 		if (likely(len < PKT_LEN_WHEN_EXTENDING))  in cfpkt_add_body()
190 			addlen = len;  in cfpkt_add_body()
204 	to = pskb_put(skb, lastskb, len);  in cfpkt_add_body()
206 		memcpy(to, data, len);  in cfpkt_add_body()
215 int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len)  in cfpkt_add_head()  argument
224 	if (unlikely(skb_headroom(skb) < len)) {  in cfpkt_add_head()
236 	to = skb_push(skb, len);  in cfpkt_add_head()
237 	memcpy(to, data, len);  in cfpkt_add_head()
242 inline int cfpkt_add_trail(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_trail()  argument
244 	return cfpkt_add_body(pkt, data, len);  in cfpkt_add_trail()
250 	return skb->len;  in cfpkt_getlen()
270 int cfpkt_setlen(struct cfpkt *pkt, u16 len)  in cfpkt_setlen()  argument
278 	if (likely(len <= skb->len)) {  in cfpkt_setlen()
280 			___pskb_trim(skb, len);  in cfpkt_setlen()
282 			skb_trim(skb, len);  in cfpkt_setlen()
288 	if (unlikely(!cfpkt_pad_trail(pkt, len - skb->len)))  in cfpkt_setlen()