diff options
| author | Tanner Love <tannerlove@google.com> | 2020-11-06 13:07:40 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 09:50:38 +0200 |
| commit | 3a1c395703bef879cc13b4b02530db72d2c3aeb6 (patch) | |
| tree | 35dc25fb87b0d2917c76073d857971353bb2ddb3 /include/uapi/linux | |
| parent | d10c5162b4931a48bf95783e67c380f2af3397cd (diff) | |
net/packet: make packet_fanout.arr size configurable up to 64K
[ Upstream commit 9c661b0b85444e426d3f23250305eeb16f6ffe88 ]
One use case of PACKET_FANOUT is lockless reception with one socket
per CPU. 256 is a practical limit on increasingly many machines.
Increase PACKET_FANOUT_MAX to 64K. Expand setsockopt PACKET_FANOUT to
take an extra argument max_num_members. Also explicitly define a
fanout_args struct, instead of implicitly casting to an integer. This
documents the API and simplifies the control flow.
If max_num_members is not specified or is set to 0, then 256 is used,
same as before.
Signed-off-by: Tanner Love <tannerlove@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/if_packet.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/uapi/linux/if_packet.h b/include/uapi/linux/if_packet.h index 3d884d68eb30..c07caf7b40db 100644 --- a/include/uapi/linux/if_packet.h +++ b/include/uapi/linux/if_packet.h @@ -2,6 +2,7 @@ #ifndef __LINUX_IF_PACKET_H #define __LINUX_IF_PACKET_H +#include <asm/byteorder.h> #include <linux/types.h> struct sockaddr_pkt { @@ -296,6 +297,17 @@ struct packet_mreq { unsigned char mr_address[8]; }; +struct fanout_args { +#if defined(__LITTLE_ENDIAN_BITFIELD) + __u16 id; + __u16 type_flags; +#else + __u16 type_flags; + __u16 id; +#endif + __u32 max_num_members; +}; + #define PACKET_MR_MULTICAST 0 #define PACKET_MR_PROMISC 1 #define PACKET_MR_ALLMULTI 2 |