diff options
| author |   Arjun Roy <arjunroy@google.com> | 2021-01-20 16:41:48 -0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2021-01-22 20:05:56 -0800 |
| commit | 7eeba1706eba6def15f6cb2fc7b3c3b9a2651edc (patch) | |
| tree | 144fe447206ea0b48670e815cf02ab2354338a52 /include/uapi/linux/tcp.h | |
| parent | tcp: Remove CMSG magic numbers for tcp_recvmsg(). (diff) | |
| download | linux-dev-7eeba1706eba6def15f6cb2fc7b3c3b9a2651edc.tar.xz linux-dev-7eeba1706eba6def15f6cb2fc7b3c3b9a2651edc.zip | |
tcp: Add receive timestamp support for receive zerocopy.
tcp_recvmsg() uses the CMSG mechanism to receive control information
like packet receive timestamps. This patch adds CMSG fields to
struct tcp_zerocopy_receive, and provides receive timestamps
if available to the user.
Signed-off-by: Arjun Roy <arjunroy@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/uapi/linux/tcp.h')
| -rw-r--r-- | include/uapi/linux/tcp.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index 16dfa40bdac3..42fc5a640df4 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -354,5 +354,9 @@ struct tcp_zerocopy_receive { __u64 copybuf_address; /* in: copybuf address (small reads) */ __s32 copybuf_len; /* in/out: copybuf bytes avail/used or error */ __u32 flags; /* in: flags */ + __u64 msg_control; /* ancillary data */ + __u64 msg_controllen; + __u32 msg_flags; + /* __u32 hole; Next we must add >1 u32 otherwise length checks fail. */ }; #endif /* _UAPI_LINUX_TCP_H */ |