17 #define PKT_ERROR(pkt, errmsg)		   \  argument
19 	cfpkt_priv(pkt)->erronous = true;  \
20 	skb_reset_tail_pointer(&pkt->skb); \
38 static inline struct cfpkt_priv_data *cfpkt_priv(struct cfpkt *pkt)  in cfpkt_priv()  argument
40 	return (struct cfpkt_priv_data *) pkt->skb.cb;  in cfpkt_priv()
43 static inline bool is_erronous(struct cfpkt *pkt)  in is_erronous()  argument
45 	return cfpkt_priv(pkt)->erronous;  in is_erronous()
48 static inline struct sk_buff *pkt_to_skb(struct cfpkt *pkt)  in pkt_to_skb()  argument
50 	return &pkt->skb;  in pkt_to_skb()
60 	struct cfpkt *pkt = skb_to_pkt(nativepkt);  in cfpkt_fromnative()  local
61 	cfpkt_priv(pkt)->erronous = false;  in cfpkt_fromnative()
62 	return pkt;  in cfpkt_fromnative()
66 void *cfpkt_tonative(struct cfpkt *pkt)  in cfpkt_tonative()  argument
68 	return (void *) pkt;  in cfpkt_tonative()
89 void cfpkt_destroy(struct cfpkt *pkt)  in cfpkt_destroy()  argument
91 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_destroy()
95 inline bool cfpkt_more(struct cfpkt *pkt)  in cfpkt_more()  argument
97 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_more()
101 int cfpkt_peek_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_peek_head()  argument
103 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_peek_head()
108 	return !cfpkt_extr_head(pkt, data, len) &&  in cfpkt_peek_head()
109 	    !cfpkt_add_head(pkt, data, len);  in cfpkt_peek_head()
112 int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len)  in cfpkt_extr_head()  argument
114 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_head()
116 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_head()
120 		PKT_ERROR(pkt, "read beyond end of packet\n");  in cfpkt_extr_head()
126 			PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_head()
138 int cfpkt_extr_trail(struct cfpkt *pkt, void *dta, u16 len)  in cfpkt_extr_trail()  argument
140 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_extr_trail()
143 	if (unlikely(is_erronous(pkt)))  in cfpkt_extr_trail()
147 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_extr_trail()
151 		PKT_ERROR(pkt, "read beyond end of packet\n");  in cfpkt_extr_trail()
160 int cfpkt_pad_trail(struct cfpkt *pkt, u16 len)  in cfpkt_pad_trail()  argument
162 	return cfpkt_add_body(pkt, NULL, len);  in cfpkt_pad_trail()
165 int cfpkt_add_body(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_body()  argument
167 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_body()
173 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_body()
191 			PKT_ERROR(pkt, "cow failed\n");  in cfpkt_add_body()
203 inline int cfpkt_addbdy(struct cfpkt *pkt, u8 data)  in cfpkt_addbdy()  argument
205 	return cfpkt_add_body(pkt, &data, 1);  in cfpkt_addbdy()
208 int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len)  in cfpkt_add_head()  argument
210 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_add_head()
215 	if (unlikely(is_erronous(pkt)))  in cfpkt_add_head()
218 		PKT_ERROR(pkt, "no headroom\n");  in cfpkt_add_head()
225 		PKT_ERROR(pkt, "cow failed\n");  in cfpkt_add_head()
235 inline int cfpkt_add_trail(struct cfpkt *pkt, const void *data, u16 len)  in cfpkt_add_trail()  argument
237 	return cfpkt_add_body(pkt, data, len);  in cfpkt_add_trail()
240 inline u16 cfpkt_getlen(struct cfpkt *pkt)  in cfpkt_getlen()  argument
242 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_getlen()
246 int cfpkt_iterate(struct cfpkt *pkt,  in cfpkt_iterate()  argument
254 	if (unlikely(is_erronous(pkt)))  in cfpkt_iterate()
256 	if (unlikely(skb_linearize(&pkt->skb) != 0)) {  in cfpkt_iterate()
257 		PKT_ERROR(pkt, "linearize failed\n");  in cfpkt_iterate()
260 	return iter_func(data, pkt->skb.data, cfpkt_getlen(pkt));  in cfpkt_iterate()
263 int cfpkt_setlen(struct cfpkt *pkt, u16 len)  in cfpkt_setlen()  argument
265 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_setlen()
268 	if (unlikely(is_erronous(pkt)))  in cfpkt_setlen()
277 		return cfpkt_getlen(pkt);  in cfpkt_setlen()
281 	if (unlikely(!cfpkt_pad_trail(pkt, len - skb->len)))  in cfpkt_setlen()
282 		PKT_ERROR(pkt, "skb_pad_trail failed\n");  in cfpkt_setlen()
284 	return cfpkt_getlen(pkt);  in cfpkt_setlen()
322 struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos)  in cfpkt_split()  argument
325 	struct sk_buff *skb = pkt_to_skb(pkt);  in cfpkt_split()
330 	if (unlikely(is_erronous(pkt)))  in cfpkt_split()
334 		PKT_ERROR(pkt, "trying to split beyond end of packet\n");  in cfpkt_split()
358 bool cfpkt_erroneous(struct cfpkt *pkt)  in cfpkt_erroneous()  argument
360 	return cfpkt_priv(pkt)->erronous;  in cfpkt_erroneous()
363 struct caif_payload_info *cfpkt_info(struct cfpkt *pkt)  in cfpkt_info()  argument
365 	return (struct caif_payload_info *)&pkt_to_skb(pkt)->cb;  in cfpkt_info()
369 void cfpkt_set_prio(struct cfpkt *pkt, int prio)  in cfpkt_set_prio()  argument
371 	pkt_to_skb(pkt)->priority = prio;  in cfpkt_set_prio()