skb: add some helpers for skb drop reasons

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In order to simply the definition and assignment for
'enum skb_drop_reason', introduce some helpers.

SKB_DR() is used to define a variable of type 'enum skb_drop_reason'
with the 'SKB_DROP_REASON_NOT_SPECIFIED' initial value.

SKB_DR_SET() is used to set the value of the variable. Seems it is
a little useless? But it makes the code shorter.

SKB_DR_OR() is used to set the value of the variable if it is not set
yet, which means its value is SKB_DROP_REASON_NOT_SPECIFIED.

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Menglong Dong 2022-04-13 16:15:52 +08:00 • committed by David S. Miller

parent dba47afdc7

commit d6d3146ce5

1 changed files with 12 additions and 0 deletions

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include/linux/skbuff.h

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