4dfbcffbb9
Make the Ethernet PCP codepoint configurable for L2 local traffic, to allow lower latency for iSCSI block IO. This addresses the initiator side only. Reviewed by: mav, trasz, bcr Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D26739
196 lines
4.7 KiB
Groff
196 lines
4.7 KiB
Groff
.\" Copyright (c) 2007-2010 Daniel Braniss <danny@cs.huji.ac.il>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 6, 2016
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.Dt ISCSI.CONF 5
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.Os
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.Sh NAME
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.Nm iscsi.conf
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.Nd iSCSI initiator configuration file
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.Sh DESCRIPTION
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The
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.Nm
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configuration file is used by the
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.Xr iscsictl 8
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and
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.Xr iscontrol 8
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utilities.
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The general syntax is:
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.Bf Li
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.Bd -literal
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# this is a comment
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nickname_1 {
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variable = value;
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...
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}
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nickname_2 {
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variable = value;
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...
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}
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...
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.Ed
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.Ef
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.Bl -tag -width MaxConnections
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.It Cm AuthMethod
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Sets the authentication type.
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Type can be either
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.Qq Ar None ,
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or
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.Qq Ar CHAP .
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Default is
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.Qq Ar None .
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When set to
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.Cm CHAP ,
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both
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.Cm chapIName
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and
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.Cm chapSecret
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must be defined.
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.It Cm chapIName
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Login for CHAP authentication.
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.It Cm chapSecret
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Secret for CHAP authentication.
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.It Cm tgtChapName
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Target login for Mutual CHAP authentication.
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.It Cm tgtChapSecret
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Target secret for Mutual CHAP authentication.
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.It Cm HeaderDigest
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Sets the header digest; a checksum calculated over the header of iSCSI
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PDUs, and verified on receive.
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Digest can be either
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.Qq Ar None ,
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or
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.Qq Ar CRC32C .
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Default is
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.Qq Ar None .
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.It Cm DataDigest
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Sets the data digest; a checksum calculated over the Data Section of iSCSI
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PDUs, and verified on receive.
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Digest can be either
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.Qq Ar None ,
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or
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.Qq Ar CRC32C .
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Default is
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.Qq Ar None .
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.It Cm InitiatorName
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Sets the initiator name.
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By default, the name is concatenation of
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.Qq Ar iqn.1994-09.org.freebsd:
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with the hostname.
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.It Cm TargetName
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Sets the target name.
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Not required for discovery sessions.
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.It Cm TargetAddress
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Sets the target address and port, in
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.Sy address[:port]
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format.
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The
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.Sy address
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can be either an IP address, or hostname.
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The optional port defaults to 3260.
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.It Cm SessionType
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Sets the session type.
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Type can be either
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.Qq Ar Discovery ,
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or
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.Qq Ar Normal .
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Default is
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.Qq Ar Normal .
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For normal sessions, the
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.Sy TargetName
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must be defined.
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Discovery sessions result in the initiator connecting to all the targets
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returned by SendTargets iSCSI discovery with the defined
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.Sy TargetAddress .
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.It Cm Enable
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Enable or disable the session.
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State can be either
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.Qq Ar On ,
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or
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.Qq Ar Off .
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Default is
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.Qq Ar On .
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.It Cm Offload
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Name of selected iSCSI hardware offload driver.
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Default is
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.Qq Ar None .
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.It Cm Protocol
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Name of selected protocol.
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It can be either
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.Qq Ar iSER ,
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for iSCSI over RDMA, or
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.Qq Ar iSCSI .
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Default is
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.Qq Ar iSCSI .
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.It Cm dscp
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The DiffServ Codepoint used for sending data. The DSCP can be
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set to numeric, or hexadecimal values directly, as well as the
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well-defined
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.Qq Ar cs<n>
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and
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.Qq Ar af<xx>
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codepoints.
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Default is no specified dscp codepoint, which means the default
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of the outgoing interface is used.
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.It Cm pcp
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The 802.1Q Priority CodePoint used for sending packets.
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The PCP can be set to a value in the range between
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.Qq Ar 0
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to
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.Qq Ar 7 .
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When omitted, the default for the outgoing interface is used.
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.El
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.Sh FILES
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.Bl -tag -width indent
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.It Pa /etc/iscsi.conf
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.El
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.Sh EXAMPLES
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.Bd -literal
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myiscsi { # nickname
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targetaddress = iscsi1
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targetname = iqn.1900.com.com:sn.123456
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}
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myiscsi6 { # nickname
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targetaddress = [2001:db8::de:ef]:3260
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targetname = iqn.1900.com.com:sn.123456
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}
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chaptest {
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targetaddress = 10.0.0.1;
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targetname = iqn.1900.com.com:sn.123456;
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initiatorname = iqn.2005-01.il.ac.huji.cs:nobody;
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authmethod = CHAP;
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chapiname = iqn.2005-01.il.ac.huji.cs:nobody;
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chapsecret = "secretsecret";
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}
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.Ed
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.Sh SEE ALSO
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.Xr iscontrol 8 ,
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.Xr iscsictl 8
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.\"Sh HISTORY
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.\"Sh AUTHORS
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