Date: Thu, 25 Jul 2024 19:33:27 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: 5d0498db4782 - main - nvmf_tcp: Rename max_c2hdata sysctl to max_transmit_data Message-ID: <202407251933.46PJXRs3042591@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=5d0498db478253c42b5e4140b9aff8596a797464 commit 5d0498db478253c42b5e4140b9aff8596a797464 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2024-07-25 19:29:43 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2024-07-25 19:29:43 +0000 nvmf_tcp: Rename max_c2hdata sysctl to max_transmit_data This sysctl sets a cap on the maximum payload of transmitted data PDUs including both C2H_DATA and H2C_DATA PDUs, not just C2H_DATA PDUs. Sponsored by: Chelsio Communications --- share/man/man4/nvmf_tcp.4 | 15 +++++++++++---- sys/dev/nvmf/nvmf_tcp.c | 2 +- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/share/man/man4/nvmf_tcp.4 b/share/man/man4/nvmf_tcp.4 index 4d77997c19a2..0a650e342f0e 100644 --- a/share/man/man4/nvmf_tcp.4 +++ b/share/man/man4/nvmf_tcp.4 @@ -3,7 +3,7 @@ .\" .\" Copyright (c) 2024 Chelsio Communications, Inc. .\" -.Dd May 2, 2024 +.Dd July 25, 2024 .Dt NVMF_TCP 4 .Os .Sh NAME @@ -35,10 +35,17 @@ variables and .Xr loader 8 tunables: .Bl -tag -width indent -.It Va kern.nvmf.tcp.max_c2hdata -The maximum data payload size of a +.It Va kern.nvmf.tcp.max_transmit_data +The maximum data payload size of .Va C2H_DATA -PDU sent by the controller to a remote host. +and +.Va H2C_DATA +PDUs. +A remote controller may enforce a lower limit on the size of +.Va H2C_DATA +PDUs via the +.Va MAXH2CDATA +parameter. The default size is 256 kilobytes. .El .Sh SEE ALSO diff --git a/sys/dev/nvmf/nvmf_tcp.c b/sys/dev/nvmf/nvmf_tcp.c index 57c81eceee02..8f1b3bf01e39 100644 --- a/sys/dev/nvmf/nvmf_tcp.c +++ b/sys/dev/nvmf/nvmf_tcp.c @@ -138,7 +138,7 @@ static void tcp_free_qpair(struct nvmf_qpair *nq); SYSCTL_NODE(_kern_nvmf, OID_AUTO, tcp, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "TCP transport"); static u_int tcp_max_transmit_data = 256 * 1024; -SYSCTL_UINT(_kern_nvmf_tcp, OID_AUTO, max_c2hdata, CTLFLAG_RWTUN, +SYSCTL_UINT(_kern_nvmf_tcp, OID_AUTO, max_transmit_data, CTLFLAG_RWTUN, &tcp_max_transmit_data, 0, "Maximum size of data payload in a transmitted PDU");
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