17 #define PKT_ERROR(pkt, errmsg)		   \  argument
19 	cfpkt_priv(pkt)->erronous = true;  \
20 	skb_reset_tail_pointer(&pkt->skb); \
45 static inline struct cfpkt_priv_data *cfpkt_priv(struct cfpkt *pkt)  in cfpkt_priv()  argument
47 	return (struct cfpkt_priv_data *) pkt->skb.cb;  in cfpkt_priv()
50 static inline bool is_erronous(struct cfpkt *pkt)  in is_erronous()  argument
52 	return cfpkt_priv(pkt)->erronous;  in is_erronous()
55 static inline struct sk_buff *pkt_to_skb(struct cfpkt *pkt)  in pkt_to_skb()  argument
57 	return &pkt->skb;  in pkt_to_skb()
67 	struct cfpkt *pkt = skb_to_pkt(nativepkt);  in cfpkt_fromnative()  local
68 	cfpkt_priv(pkt)->erronous = false;  in cfpkt_fromnative()
69 	return pkt;  in cfpkt_fromnative()
73 void *cfpkt_tonative(struct cfpkt *pkt)  in cfpkt_tonative()  argument
75 	return (void *) pkt;  in cfpkt_tonative()
96 void cfpkt_destroy(struct cfpkt *pkt)  in cfpkt_destroy()  argument
98 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_destroy()
102 inline bool cfpkt_more(struct cfpkt *pkt)  in cfpkt_more()  argument
104 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_more()
108 int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_peek_head()  argument
110 	struct sk_buff *skb = pkt_to_skb(pkt);  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
121 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_head()
123 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_head()
127 		PKT_ERROR(pkt, "read beyond end of packet\n");  in cfpkt_extr_head()
133 			PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_head()
145 int cfpkt_extr_trail(struct cfpkt *pkt, void *dta, u16 len)  in cfpkt_extr_trail()  argument
147 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_trail()
150 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_trail()
154 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_trail()
158 		PKT_ERROR(pkt, "read beyond end of packet\n");  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
174 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_body()
180 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_body()
198 			PKT_ERROR(pkt, "cow failed\n");  in cfpkt_add_body()
210 inline int cfpkt_addbdy(struct cfpkt *pkt, u8 data)  in cfpkt_addbdy()  argument
212 	return cfpkt_add_body(pkt, &data, 1);  in cfpkt_addbdy()
215 int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len)  in cfpkt_add_head()  argument
217 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_head()
222 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_head()
225 		PKT_ERROR(pkt, "no headroom\n");  in cfpkt_add_head()
232 		PKT_ERROR(pkt, "cow failed\n");  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()
247 inline u16 cfpkt_getlen(struct cfpkt *pkt)  in cfpkt_getlen()  argument
249 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_getlen()
253 int cfpkt_iterate(struct cfpkt *pkt,  in cfpkt_iterate()  argument
261 	if (unlikely(is_erronous(pkt)))  in cfpkt_iterate()
263 	if (unlikely(skb_linearize(&pkt->skb) != 0)) {  in cfpkt_iterate()
264 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_iterate()
267 	return iter_func(data, pkt->skb.data, cfpkt_getlen(pkt));  in cfpkt_iterate()
270 int cfpkt_setlen(struct cfpkt *pkt, u16 len)  in cfpkt_setlen()  argument
272 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_setlen()
275 	if (unlikely(is_erronous(pkt)))  in cfpkt_setlen()
284 		return cfpkt_getlen(pkt);  in cfpkt_setlen()
288 	if (unlikely(!cfpkt_pad_trail(pkt, len - skb->len)))  in cfpkt_setlen()
289 		PKT_ERROR(pkt, "skb_pad_trail failed\n");  in cfpkt_setlen()
291 	return cfpkt_getlen(pkt);  in cfpkt_setlen()
331 struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos)  in cfpkt_split()  argument
334 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_split()
339 	if (unlikely(is_erronous(pkt)))  in cfpkt_split()
343 		PKT_ERROR(pkt, "trying to split beyond end of packet\n");  in cfpkt_split()
367 bool cfpkt_erroneous(struct cfpkt *pkt)  in cfpkt_erroneous()  argument
369 	return cfpkt_priv(pkt)->erronous;  in cfpkt_erroneous()
372 struct caif_payload_info *cfpkt_info(struct cfpkt *pkt)  in cfpkt_info()  argument
374 	return (struct caif_payload_info *)&pkt_to_skb(pkt)->cb;  in cfpkt_info()
378 void cfpkt_set_prio(struct cfpkt *pkt, int prio)  in cfpkt_set_prio()  argument
380 	pkt_to_skb(pkt)->priority = prio;  in cfpkt_set_prio()