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| author | Menglong Dong <imagedong@tencent.com> | 2022-04-13 11:15:52 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-13 15:09:56 +0300 |
| commit | d6d3146ce532268ad0ffd8d92d2b7492898decf1 (patch) | |
| tree | 4ece9be47269f6bc07b86282f4a82e82c21703b2 /include/linux/skbuff.h | |
| parent | dba47afdc7d51b22dd9223a391d2b5ceb9bbe30c (diff) | |
| download | linux-d6d3146ce532268ad0ffd8d92d2b7492898decf1.tar.xz | |
skb: add some helpers for skb drop reasons
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>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 9b81ba497665..0cbd6ada957c 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -450,6 +450,18 @@ enum skb_drop_reason { SKB_DROP_REASON_MAX, }; +#define SKB_DR_INIT(name, reason) \ + enum skb_drop_reason name = SKB_DROP_REASON_##reason +#define SKB_DR(name) \ + SKB_DR_INIT(name, NOT_SPECIFIED) +#define SKB_DR_SET(name, reason) \ + (name = SKB_DROP_REASON_##reason) +#define SKB_DR_OR(name, reason) \ + do { \ + if (name == SKB_DROP_REASON_NOT_SPECIFIED) \ + SKB_DR_SET(name, reason); \ + } while (0) + /* To allow 64K frame to be packed as single skb without frag_list we * require 64K/PAGE_SIZE pages plus 1 additional page to allow for * buffers which do not start on a page boundary. |