git: ce5a6a3adda6 - stable/14 - tcp: Add a new kernel-only TCP_USE_DDP socket option
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Date: Fri, 12 Apr 2024 21:31:27 UTC
The branch stable/14 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=ce5a6a3adda64b3385312ffc9453b8ea9f556e80 commit ce5a6a3adda64b3385312ffc9453b8ea9f556e80 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2024-03-20 22:29:02 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2024-04-12 19:25:11 +0000 tcp: Add a new kernel-only TCP_USE_DDP socket option This socket option can be used by in-kernel consumers (like NFS) to request a NIC to use optimized receive of large buffers for a connection. The current use case is to support DDP by the TOE on Chelsio NICs. Reviewed by: rscheff, tuexen, glebius Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D44000 (cherry picked from commit 3d0a736796a99fe70be9de97beec8f10970c6905) --- sys/netinet/tcp.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/netinet/tcp.h b/sys/netinet/tcp.h index bfb825930c66..56271203bc18 100644 --- a/sys/netinet/tcp.h +++ b/sys/netinet/tcp.h @@ -187,6 +187,9 @@ struct tcphdr { #define TCP_RXTLS_MODE 42 /* Receive TLS mode */ #define TCP_IWND_NB 43 /* Override initial window (units: bytes) */ #define TCP_IWND_NSEG 44 /* Override initial window (units: MSS segs) */ +#ifdef _KERNEL +#define TCP_USE_DDP 45 /* Use direct data placement for so_rcvbuf */ +#endif #define TCP_LOGID_CNT 46 /* get number of connections with the same ID */ #define TCP_LOG_TAG 47 /* configure tag for grouping logs */ #define TCP_USER_LOG 48 /* userspace log event */