Eric Lee / smarc-ti-linux-kernel

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Commit 00768244923f66801958a8d2d103f7b65608c9b6

Authored by Thomas Graf
Committed by David S. Miller
1 parent f88a10d656
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

[NETLINK] Routing attribute related shortcuts 

RTA_GET_U(32|64)(tlv)
   Assumes TLV is a u32/u64 field and returns its value.

 RTA_GET_[M]SECS(tlv)
   Assumes TLV is a u64 and transports jiffies converted
   to seconds or milliseconds and returns its value.

 RTA_PUT_U(32|64)(skb, type, value)
   Appends %value as fixed u32/u64 to %skb as TLV %type.

 RTA_PUT_[M]SECS(skb, type, jiffies)
   Converts %jiffies to secs/msecs and appends it as u64
   to %skb as TLV %type.

 RTA_PUT_STRING(skb, type, string)
   Appends %NUL terminated %string to %skb as TLV %type.

 RTA_NEST(skb, type)
   Starts a nested TLV %type and returns the nesting handle.

 RTA_NEST_END(skb, nesting_handle)
   Finishes the nested TLV %nesting_handle, must be called
   symmetric to RTA_NEST(). Returns skb->len

 RTA_NEST_CANCEL(skb, nesting_handle)
   Cancel the nested TLV %nesting_handle and trim nested TLV
   from skb again, returns -1.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 45 additions and 0 deletions Side-by-side Diff

include/linux/rtnetlink.h
Diff comments   View file @ 0076824
... ... @@ -789,6 +789,51 @@
789 789 ({ if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
790 790 goto rtattr_failure; \
791 791 memcpy(skb_put(skb, RTA_ALIGN(attrlen)), data, attrlen); })
  792 +
  793 +#define RTA_PUT_U32(skb, attrtype, value) \
  794 +({ u32 _tmp = (value); \
  795 + RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
  796 +
  797 +#define RTA_PUT_U64(skb, attrtype, value) \
  798 +({ u64 _tmp = (value); \
  799 + RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
  800 +
  801 +#define RTA_PUT_SECS(skb, attrtype, value) \
  802 + RTA_PUT_U64(skb, attrtype, (value) / HZ)
  803 +
  804 +#define RTA_PUT_MSECS(skb, attrtype, value) \
  805 + RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
  806 +
  807 +#define RTA_PUT_STRING(skb, attrtype, value) \
  808 + RTA_PUT(skb, attrtype, strlen(value) + 1, value)
  809 +
  810 +#define RTA_NEST(skb, type) \
  811 +({ struct rtattr *__start = (struct rtattr *) (skb)->tail; \
  812 + RTA_PUT(skb, type, 0, NULL); \
  813 + __start; })
  814 +
  815 +#define RTA_NEST_END(skb, start) \
  816 +({ (start)->rta_len = ((skb)->tail - (unsigned char *) (start)); \
  817 + (skb)->len; })
  818 +
  819 +#define RTA_NEST_CANCEL(skb, start) \
  820 +({ skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
  821 + -1; })
  822 +
  823 +#define RTA_GET_U32(rta) \
  824 +({ if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
  825 + goto rtattr_failure; \
  826 + *(u32 *) RTA_DATA(rta); })
  827 +
  828 +#define RTA_GET_U64(rta) \
  829 +({ u64 _tmp; \
  830 + if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
  831 + goto rtattr_failure; \
  832 + memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
  833 + _tmp; })
  834 +
  835 +#define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
  836 +#define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
792 837  
793 838 static inline struct rtattr *
794 839 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)