18 #define PKT_ERROR(pkt, errmsg)		   \  argument
20 	cfpkt_priv(pkt)->erronous = true;  \
21 	skb_reset_tail_pointer(&pkt->skb); \
46 static inline struct cfpkt_priv_data *cfpkt_priv(struct cfpkt *pkt)  in cfpkt_priv()  argument
48 	return (struct cfpkt_priv_data *) pkt->skb.cb;  in cfpkt_priv()
51 static inline bool is_erronous(struct cfpkt *pkt)  in is_erronous()  argument
53 	return cfpkt_priv(pkt)->erronous;  in is_erronous()
56 static inline struct sk_buff *pkt_to_skb(struct cfpkt *pkt)  in pkt_to_skb()  argument
58 	return &pkt->skb;  in pkt_to_skb()
68 	struct cfpkt *pkt = skb_to_pkt(nativepkt);  in cfpkt_fromnative()  local
69 	cfpkt_priv(pkt)->erronous = false;  in cfpkt_fromnative()
70 	return pkt;  in cfpkt_fromnative()
74 void *cfpkt_tonative(struct cfpkt *pkt)  in cfpkt_tonative()  argument
76 	return (void *) pkt;  in cfpkt_tonative()
101 void cfpkt_destroy(struct cfpkt *pkt)  in cfpkt_destroy()  argument
103 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_destroy()
107 inline bool cfpkt_more(struct cfpkt *pkt)  in cfpkt_more()  argument
109 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_more()
113 int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_peek_head()  argument
115 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_peek_head()
120 	return !cfpkt_extr_head(pkt, data, len) &&  in cfpkt_peek_head()
121 	    !cfpkt_add_head(pkt, data, len);  in cfpkt_peek_head()
124 int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_extr_head()  argument
126 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_head()
128 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_head()
132 		PKT_ERROR(pkt, "read beyond end of packet\n");  in cfpkt_extr_head()
138 			PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_head()
150 int cfpkt_extr_trail(struct cfpkt *pkt, void *dta, u16 len)  in cfpkt_extr_trail()  argument
152 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_trail()
155 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_trail()
159 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_trail()
163 		PKT_ERROR(pkt, "read beyond end of packet\n");  in cfpkt_extr_trail()
172 int cfpkt_pad_trail(struct cfpkt *pkt, u16 len)  in cfpkt_pad_trail()  argument
174 	return cfpkt_add_body(pkt, NULL, len);  in cfpkt_pad_trail()
177 int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_body()  argument
179 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_body()
185 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_body()
203 			PKT_ERROR(pkt, "cow failed\n");  in cfpkt_add_body()
215 inline int cfpkt_addbdy(struct cfpkt *pkt, u8 data)  in cfpkt_addbdy()  argument
217 	return cfpkt_add_body(pkt, &data, 1);  in cfpkt_addbdy()
220 int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len)  in cfpkt_add_head()  argument
222 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_head()
227 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_head()
230 		PKT_ERROR(pkt, "no headroom\n");  in cfpkt_add_head()
237 		PKT_ERROR(pkt, "cow failed\n");  in cfpkt_add_head()
247 inline int cfpkt_add_trail(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_trail()  argument
249 	return cfpkt_add_body(pkt, data, len);  in cfpkt_add_trail()
252 inline u16 cfpkt_getlen(struct cfpkt *pkt)  in cfpkt_getlen()  argument
254 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_getlen()
258 int cfpkt_iterate(struct cfpkt *pkt,  in cfpkt_iterate()  argument
266 	if (unlikely(is_erronous(pkt)))  in cfpkt_iterate()
268 	if (unlikely(skb_linearize(&pkt->skb) != 0)) {  in cfpkt_iterate()
269 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_iterate()
272 	return iter_func(data, pkt->skb.data, cfpkt_getlen(pkt));  in cfpkt_iterate()
275 int cfpkt_setlen(struct cfpkt *pkt, u16 len)  in cfpkt_setlen()  argument
277 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_setlen()
280 	if (unlikely(is_erronous(pkt)))  in cfpkt_setlen()
289 			return cfpkt_getlen(pkt);  in cfpkt_setlen()
293 	if (unlikely(!cfpkt_pad_trail(pkt, len - skb->len)))  in cfpkt_setlen()
294 		PKT_ERROR(pkt, "skb_pad_trail failed\n");  in cfpkt_setlen()
296 	return cfpkt_getlen(pkt);  in cfpkt_setlen()
340 struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos)  in cfpkt_split()  argument
343 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_split()
348 	if (unlikely(is_erronous(pkt)))  in cfpkt_split()
352 		PKT_ERROR(pkt, "trying to split beyond end of packet\n");  in cfpkt_split()
378 bool cfpkt_erroneous(struct cfpkt *pkt)  in cfpkt_erroneous()  argument
380 	return cfpkt_priv(pkt)->erronous;  in cfpkt_erroneous()
383 struct caif_payload_info *cfpkt_info(struct cfpkt *pkt)  in cfpkt_info()  argument
385 	return (struct caif_payload_info *)&pkt_to_skb(pkt)->cb;  in cfpkt_info()
389 void cfpkt_set_prio(struct cfpkt *pkt, int prio)  in cfpkt_set_prio()  argument
391 	pkt_to_skb(pkt)->priority = prio;  in cfpkt_set_prio()