[RTNETLINK]: Add RTA_(PUT|GET) shortcuts for u8, u16, and flag (8f48bcd4) · Commits · 戴 / test

include/linux/rtnetlink.h

+23 −0

Original line number	Diff line number	Diff line
		@@ -897,6 +897,14 @@ extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const voi
		goto rtattr_failure; \
		memcpy(skb_put(skb, RTA_ALIGN(attrlen)), data, attrlen); })

		#define RTA_PUT_U8(skb, attrtype, value) \
		({ u8 _tmp = (value); \
		RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })

		#define RTA_PUT_U16(skb, attrtype, value) \
		({ u16 _tmp = (value); \
		RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })

		#define RTA_PUT_U32(skb, attrtype, value) \
		({ u32 _tmp = (value); \
		RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
		@@ -914,6 +922,9 @@ extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const voi
		#define RTA_PUT_STRING(skb, attrtype, value) \
		RTA_PUT(skb, attrtype, strlen(value) + 1, value)

		#define RTA_PUT_FLAG(skb, attrtype) \
		RTA_PUT(skb, attrtype, 0, NULL);

		#define RTA_NEST(skb, type) \
		({ struct rtattr __start = (struct rtattr ) (skb)->tail; \
		RTA_PUT(skb, type, 0, NULL); \
		@@ -928,6 +939,16 @@ extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const voi
		skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
		-1; })

		#define RTA_GET_U8(rta) \
		({ if (!rta \|\| RTA_PAYLOAD(rta) < sizeof(u8)) \
		goto rtattr_failure; \
		(u8 ) RTA_DATA(rta); })

		#define RTA_GET_U16(rta) \
		({ if (!rta \|\| RTA_PAYLOAD(rta) < sizeof(u16)) \
		goto rtattr_failure; \
		(u16 ) RTA_DATA(rta); })

		#define RTA_GET_U32(rta) \
		({ if (!rta \|\| RTA_PAYLOAD(rta) < sizeof(u32)) \
		goto rtattr_failure; \
		@@ -940,6 +961,8 @@ extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const voi
		memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
		_tmp; })

		#define RTA_GET_FLAG(rta) (!!(rta))

		#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
		#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))

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