diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-09-12 16:02:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-15 10:33:46 +0100 |
| commit | 2da23eb07c91241d962f3ff05565065484cd8929 (patch) | |
| tree | 921417255db7f2389304c5f21aac9c828b58caa8 /include/linux/ipv6.h | |
| parent | d986f52124e062753e33b6fe303be5904a997eac (diff) | |
ipv6: lockless IPV6_MULTICAST_HOPS implementation
This fixes data-races around np->mcast_hops,
and make IPV6_MULTICAST_HOPS lockless.
Note that np->mcast_hops is never negative,
thus can fit an u8 field instead of s16.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/ipv6.h')
| -rw-r--r-- | include/linux/ipv6.h | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 68cf1ca94914..9cc278b5e4f4 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -214,15 +214,8 @@ struct ipv6_pinfo { __u32 frag_size; s16 hop_limit; + u8 mcast_hops; -#if defined(__BIG_ENDIAN_BITFIELD) - /* Packed in 16bits. */ - __s16 mcast_hops:9; - __u16 __unused_2:7, -#else - __u16 __unused_2:7; - __s16 mcast_hops:9; -#endif int ucast_oif; int mcast_oif; |