Date: Wed, 20 Mar 2024 22:34:37 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 3d0a736796a9 - main - tcp: Add a new kernel-only TCP_USE_DDP socket option Message-ID: <202403202234.42KMYbsv047850@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=3d0a736796a99fe70be9de97beec8f10970c6905 commit 3d0a736796a99fe70be9de97beec8f10970c6905 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2024-03-20 22:29:02 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2024-03-20 22:29:02 +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 --- sys/netinet/tcp.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/netinet/tcp.h b/sys/netinet/tcp.h index a8259fa30a3a..c97a3e04d9b6 100644 --- a/sys/netinet/tcp.h +++ b/sys/netinet/tcp.h @@ -202,6 +202,9 @@ __tcp_set_flags(struct tcphdr *th, uint16_t flags) #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 */
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