.\" Copyright (c) 2012 The FreeBSD Foundation .\" Copyright (c) 2015 Alexander Motin <[email protected]> .\" All rights reserved. .\" .\" This software was developed by Edward Tomasz Napierala under sponsorship .\" from the FreeBSD Foundation. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .Dd August 6, 2025 .Dt CTL.CONF 5 .Os .Sh NAME .Nm ctl.conf .Nd CAM Target Layer / iSCSI target / NVMeoF controller daemon configuration file .Sh DESCRIPTION The .Nm configuration file is used by the .Xr ctld 8 daemon. Lines starting with .Ql # are interpreted as comments. The general syntax of the .Nm file is: .Bd -literal -offset indent .No pidfile Ar path .No auth-group Ar name No { .Dl chap Ar user Ar secret .Dl ... } .No portal-group Ar name No { .Dl listen Ar address .\".Dl listen-iser Ar address .Dl discovery-auth-group Ar name .Dl ... } .No transport-group Ar name No { .Dl listen Ar transport Ar address .Dl ... } .No target Ar name { .Dl auth-group Ar name .Dl portal-group Ar name .Dl lun Ar number No { .Dl path Ar path .Dl } .Dl ... } .No controller Ar name { .Dl auth-group Ar name .Dl transport-group Ar name .Dl namespace Ar number No { .Dl path Ar path .Dl } .Dl ... } .Ed .Ss Global Context .Bl -tag -width indent .It Ic auth-group Ar name Create an .Sy auth-group configuration context, defining a new auth-group, which can then be assigned to any number of targets. .It Ic debug Ar level The debug verbosity level. The default is 0. .It Ic maxproc Ar number The limit for concurrently running child processes handling incoming connections. The default is 30. A setting of 0 disables the limit. .It Ic pidfile Ar path The path to the pidfile. The default is .Pa /var/run/ctld.pid . .It Ic portal-group Ar name Create a .Sy portal-group configuration context, defining a new portal-group, which can then be assigned to any number of targets. .It Ic transport-group Ar name Create a .Sy transport-group configuration context, defining a new transport-group, which can then be assigned to any number of NVMeoF controllers. .It Ic lun Ar name Create a .Sy lun configuration context, defining a LUN to be exported by any number of targets or controllers. .It Ic target Ar name Create a .Sy target configuration context, which can optionally contain one or more .Sy lun contexts. .It Ic controller Ar name Create a .Sy controller configuration context, which can optionally contain one or more .Sy namespace contexts. .It Ic timeout Ar seconds The timeout for login sessions, after which the connection will be forcibly terminated. The default is 60. A setting of 0 disables the timeout. .It Ic isns-server Ar address An IPv4 or IPv6 address and optionally port of iSNS server to register on. .It Ic isns-period Ar seconds iSNS registration period. Registered Network Entity not updated during this period will be unregistered. The default is 900. .It Ic isns-timeout Ar seconds Timeout for iSNS requests. The default is 5. .El .Ss auth-group Context .Bl -tag -width indent .It Ic auth-type Ar type Sets the authentication type. Type can be either .Qq Ar none , .Qq Ar deny , .Qq Ar chap , or .Qq Ar chap-mutual . In most cases it is not necessary to set the type using this clause; it is usually used to disable authentication for a given .Sy auth-group . .It Ic chap Ar user Ar secret A set of CHAP authentication credentials. Note that for any .Sy auth-group , the configuration may only contain either .Sy chap or .Sy chap-mutual entries; it is an error to mix them. .It Ic chap-mutual Ar user Ar secret Ar mutualuser Ar mutualsecret A set of mutual CHAP authentication credentials. Note that for any .Sy auth-group , the configuration may only contain either .Sy chap or .Sy chap-mutual entries; it is an error to mix them. .It Ic host-address Ar address Ns Op / Ns Ar prefixlen An NVMeoF host address: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only NVMeoF hosts with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no restrictions based on host address. .It Ic host-nqn Ar name An NVMeoF host name. Only NVMeoF hosts with a name matching one of the defined names will be allowed to connect. If not defined, there will be no restrictions based on NVMe host name. .It Ic initiator-name Ar initiator-name An iSCSI initiator name. Only initiators with a name matching one of the defined names will be allowed to connect. If not defined, there will be no restrictions based on initiator name. .It Ic initiator-portal Ar address Ns Op / Ns Ar prefixlen An iSCSI initiator portal: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only initiators with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no restrictions based on initiator address. .El .Ss portal-group Context .Bl -tag -width indent .It Ic discovery-auth-group Ar name Assign a previously defined authentication group to the portal group, to be used for target discovery. By default, portal groups are assigned predefined .Sy auth-group .Qq Ar default , which denies discovery. Another predefined .Sy auth-group , .Qq Ar no-authentication , may be used to permit discovery without authentication. .It Ic discovery-filter Ar filter Determines which targets are returned during discovery. Filter can be either .Qq Ar none , .Qq Ar portal , .Qq Ar portal-name , or .Qq Ar portal-name-auth . When set to .Qq Ar none , discovery will return all targets assigned to that portal group. When set to .Qq Ar portal , discovery will not return targets that cannot be accessed by the initiator because of their .Sy initiator-portal . When set to .Qq Ar portal-name , the check will include both .Sy initiator-portal and .Sy initiator-name . When set to .Qq Ar portal-name-auth , the check will include .Sy initiator-portal , .Sy initiator-name , and authentication credentials. The target is returned if it does not require CHAP authentication, or if the CHAP user and secret used during discovery match those used by the target. Note that when using .Qq Ar portal-name-auth , targets that require CHAP authentication will only be returned if .Sy discovery-auth-group requires CHAP. The default is .Qq Ar none . .It Ic listen Ar address An IPv4 or IPv6 address and port to listen on for incoming connections. .\".It Ic listen-iser Ar address .\"An IPv4 or IPv6 address and port to listen on for incoming connections .\"using iSER (iSCSI over RDMA) protocol. .It Ic offload Ar driver Define iSCSI hardware offload driver to use for this .Sy portal-group . The default is .Qq Ar none . .It Ic option Ar name Ar value The CTL-specific port options passed to the kernel. .It Ic redirect Ar address IPv4 or IPv6 address to redirect initiators to. When configured, all initiators attempting to connect to portal belonging to this .Sy portal-group will get redirected using "Target moved temporarily" login response. Redirection happens before authentication and any .Sy initiator-name or .Sy initiator-portal checks are skipped. .It Ic tag Ar value Unique 16-bit tag value of this .Sy portal-group . If not specified, the value is generated automatically. .It Ic foreign Specifies that this .Sy portal-group is listened by some other host. This host will announce it on discovery stage, but won't listen. .It Ic dscp Ar value The DiffServ Codepoint used for sending data. The DSCP can be set to numeric, or hexadecimal values directly, as well as the well-defined .Qq Ar CSx and .Qq Ar AFxx codepoints. .It Ic pcp Ar value The 802.1Q Priority CodePoint used for sending packets. The PCP can be set to a value in the range between .Qq Ar 0 to .Qq Ar 7 . When omitted, the default for the outgoing interface is used. .El .Ss transport-group Context .Bl -tag -width indent .It Ic discovery-auth-group Ar name See the description for this option for .Sy portal-group contexts. .It Ic discovery-filter Ar filter Filter can be either .Qq Ar none , .Qq Ar address , or .Qq Ar address-name . When set to .Qq Ar none , discovery will return all controllers assigned to that transport group. When set to .Qq Ar address , discovery will not return controllers that cannot be accessed by the host because of their .Sy host-address . When set to .Qq Ar address-name , the check will include both .Sy host-address and .Sy host-nqn . The default is .Qq Ar none . .It Ic listen Ar transport Ar address An IPv4 or IPv6 address and port to listen on for incoming connections using the specified NVMeoF transport. Supported transports are .Qq Ar tcp .Pq for NVMe/TCP I/O controllers and .Qq Ar discovery-tcp .Pq for NVMe/TCP discovery controllers . .It Ic option Ar name Ar value One of the following options: .Bl -column "max_admin_qsize" "Default" "Transports" .It Sy Name Ta Sy Default Ta Sy Transports Ta Sy Description .It MAXH2CDATA Ta 256KiB Ta TCP Ta Size in bytes of the maximum data payload size for data PDUs accepted from remote hosts. The value must be at least 4KiB and must be a multiple of 4. .It SQFC Ta false Ta any Ta Always enable SQ flow control. .It HDGST Ta false Ta TCP Ta Enable PDU header digests if requested by a remote host. .It DDGST Ta false Ta TCP Ta Enable PDU data digests if requested by a remote host. .It max_admin_qsize Ta 4096 Ta any Ta The maximum number of entries a remote host can request for an admin queue pair. .It max_io_qsize Ta 65536 Ta any Ta The maximum number of entries a remote host can request for an I/O queue pair. .El .It Ic tag Ar value Unique 16-bit port ID for this .Sy transport-group . If not specified, the value is generated automatically. .It Ic dscp Ar value See the description for this option for .Sy portal-group contexts. .It Ic pcp Ar value See the description for this option for .Sy portal-group contexts. .El .Ss target Context .Bl -tag -width indent .It Ic alias Ar text Assign a human-readable description to the target. There is no default. .It Ic auth-group Ar name Assign a previously defined authentication group to the target. By default, targets that do not specify their own auth settings, using clauses such as .Sy chap or .Sy initiator-name , are assigned predefined .Sy auth-group .Qq Ar default , which denies all access. Another predefined .Sy auth-group , .Qq Ar no-authentication , may be used to permit access without authentication. Note that this clause can be overridden using the second argument to a .Sy portal-group clause. .It Ic auth-type Ar type Sets the authentication type. Type can be either .Qq Ar none , .Qq Ar deny , .Qq Ar chap , or .Qq Ar chap-mutual . In most cases it is not necessary to set the type using this clause; it is usually used to disable authentication for a given .Sy target . This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single target. .It Ic chap Ar user Ar secret A set of CHAP authentication credentials. Note that targets must only use one of .Sy auth-group , chap , No or Sy chap-mutual ; it is a configuration error to mix multiple types in one target. .It Ic chap-mutual Ar user Ar secret Ar mutualuser Ar mutualsecret A set of mutual CHAP authentication credentials. Note that targets must only use one of .Sy auth-group , chap , No or Sy chap-mutual ; it is a configuration error to mix multiple types in one target. .It Ic initiator-name Ar initiator-name An iSCSI initiator name. Only initiators with a name matching one of the defined names will be allowed to connect. If not defined, there will be no restrictions based on initiator name. This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single target. .It Ic initiator-portal Ar address Ns Op / Ns Ar prefixlen An iSCSI initiator portal: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only initiators with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no restrictions based on initiator address. This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single target. .Pp The .Sy auth-type , .Sy chap , .Sy chap-mutual , .Sy initiator-name , and .Sy initiator-portal clauses in the target context provide an alternative to assigning an .Sy auth-group defined separately, useful in the common case of authentication settings specific to a single target. .It Ic portal-group Ar name Op Ar ag-name Assign a previously defined portal group to the target. The default portal group is .Qq Ar default , which makes the target available on TCP port 3260 on all configured IPv4 and IPv6 addresses. Optional second argument specifies .Sy auth-group for connections to this specific portal group. If second argument is not specified, target .Sy auth-group is used. .It Ic port Ar name .It Ic port Ar name/pp .It Ic port Ar name/pp/vp Assign specified CTL port (such as "isp0" or "isp2/1") to the target. This is used to export the target through a specific physical - eg Fibre Channel - port, in addition to portal-groups configured for the target. Use .Cm "ctladm portlist" command to retrieve the list of available ports. On startup .Xr ctld 8 configures LUN mapping and enables all assigned ports. Each port can be assigned to only one target. .It Ic redirect Ar address IPv4 or IPv6 address to redirect initiators to. When configured, all initiators attempting to connect to this target will get redirected using "Target moved temporarily" login response. Redirection happens after successful authentication. .It Ic lun Ar number Ar name Export previously defined .Sy lun by the parent target. .It Ic lun Ar number Create a .Sy lun configuration context, defining a LUN exported by the parent target. .Pp This is an alternative to defining the LUN separately, useful in the common case of a LUN being exported by a single target. .El .Ss controller Context .Bl -tag -width indent .It Ic auth-group Ar name Assign a previously defined authentication group to the controller. By default, controllers that do not specify their own auth settings, using clauses such as .Sy host-address or .Sy host-nqn , are assigned to the predefined .Sy auth-group .Qq Ar default , which denies all access. Another predefined .Sy auth-group , .Qq Ar no-authentication , may be used to permit access without authentication. Note that this clause can be overridden using the second argument to a .Sy transport-group clause. .It Ic auth-type Ar type Sets the authentication type. Type can be either .Qq Ar none or .Qq Ar deny . In most cases it is not necessary to set the type using this clause; it is usually used to disable authentication for a given .Sy controller . This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single controller. .It Ic host-address Ar address Ns Op / Ns Ar prefixlen An NVMeoF host address: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only NVMeoF hosts with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no restrictions based on host address. This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single controller. .It Ic host-nqn Ar name An NVMeoF host name. Only NVMeoF hosts with a name matching one of the defined names will be allowed to connect. If not defined, there will be no restrictions based on NVMe host name. This clause is mutually exclusive with .Sy auth-group ; one cannot use both in a single target. .Pp The .Sy auth-type , .Sy host-address , and .Sy host-nqn clauses in the controller context provide an alternative to assigning an .Sy auth-group defined separately, useful in the common case of authentication settings specific to a single controller. .It Ic transport-group Ar name Op Ar ag-name Assign a previously defined transport group to the controller. The default transport group is .Qq Ar default , which makes the controller available on TCP port 4420 on all configured IPv4 and IPv6 addresses. The optional second argument specifies the .Sy auth-group for connections to this specific transport group group. If the second argument is not specified, the controller .Sy auth-group is used. .It Ic namespace Ar number Ar name Export previously defined .Sy lun as an NVMe namespace from the parent controller. .It Ic namespace Ar number Create a .Sy namespace configuration context, defining an NVMe namespace exported by the parent target. .Pp This is an alternative to defining the namespace separately, useful in the common case of a namespace being exported by a single controller. .Sy namespace configuration contexts accept the the same properties as .Sy lun contexts. .El .Ss lun Context .Bl -tag -width indent .It Ic backend Ar block No | Ar ramdisk The CTL backend to use for a given LUN. Valid choices are .Qq Ar block and .Qq Ar ramdisk ; block is used for LUNs backed by files or disk device nodes; ramdisk is a bitsink device, used mostly for testing. The default backend is block. .It Ic blocksize Ar size The blocksize visible to the initiator. The default blocksize is 512 for disks, and 2048 for CD/DVDs. .It Ic ctl-lun Ar lun_id Global numeric identifier to use for a given LUN inside CTL. By default CTL allocates those IDs dynamically, but explicit specification may be needed for consistency in HA configurations. .It Ic device-id Ar string The SCSI Device Identification string presented to iSCSI initiators. .It Ic device-type Ar type Specify the SCSI device type to use when creating the LUN. Currently CTL supports Direct Access (type 0), Processor (type 3) and CD/DVD (type 5) LUNs. .It Ic option Ar name Ar value The CTL-specific options passed to the kernel. All CTL-specific options are documented in the .Sx OPTIONS section of .Xr ctladm 8 . .It Ic path Ar path The path to the file, device node, or .Xr zfs 8 volume used to back the LUN. For optimal performance, create ZFS volumes with the .Qq Ar volmode=dev property set. .It Ic serial Ar string The SCSI serial number presented to iSCSI initiators. .It Ic size Ar size The LUN size, in bytes or by number with a suffix of .Sy K , M , G , T (for kilobytes, megabytes, gigabytes, or terabytes). When the configuration is in UCL format, use the suffix format .Sy kKmMgG Ns | Ns Sy bB , (i.e., 4GB, 4gb, and 4Gb are all equivalent). .El .Sh FILES .Bl -tag -width ".Pa /etc/ctl.conf" -compact .It Pa /etc/ctl.conf The default location of the .Xr ctld 8 configuration file. .El .Sh EXAMPLES .Bd -literal auth-group ag0 { chap-mutual "user" "secret" "mutualuser" "mutualsecret" chap-mutual "user2" "secret2" "mutualuser" "mutualsecret" initiator-portal 192.168.1.1/16 } auth-group ag1 { auth-type none initiator-name "iqn.2012-06.com.example:initiatorhost1" initiator-name "iqn.2012-06.com.example:initiatorhost2" initiator-portal 192.168.1.1/24 initiator-portal [2001:db8::de:ef] } portal-group pg0 { discovery-auth-group no-authentication listen 0.0.0.0:3260 listen [::]:3260 listen [fe80::be:ef]:3261 } target iqn.2012-06.com.example:target0 { alias "Example target" auth-group no-authentication lun 0 { path /dev/zvol/tank/example_0 blocksize 4096 size 4G } } lun example_1 { path /dev/zvol/tank/example_1 option naa 0x50015178f369f093 } target iqn.2012-06.com.example:target1 { auth-group ag0 portal-group pg0 lun 0 example_1 lun 1 { path /dev/zvol/tank/example_2 option vendor "FreeBSD" } } target naa.50015178f369f092 { port isp0 port isp1 lun 0 example_1 } controller nqn.2012-06.com.example:controller1 { auth-group no-authentication; namespace 1 example_1 namespace 2 { backend ramdisk size 1G option capacity 1G } } .Ed .Pp An equivalent configuration in UCL format, for use with .Fl u : .Bd -literal auth-group { ag0 { chap-mutual = [ { user = "user" secret = "secretsecret" mutual-user = "mutualuser" mutual-secret = "mutualsecret" }, { user = "user2" secret = "secret2secret2" mutual-user = "mutualuser" mutual-secret = "mutualsecret" } ] } ag1 { auth-type = none initiator-name = [ "iqn.2012-06.com.example:initiatorhost1", "iqn.2012-06.com.example:initiatorhost2" ] initiator-portal = [192.168.1.1/24, "[2001:db8::de:ef]"] } } portal-group { pg0 { discovery-auth-group = no-authentication listen = [ 0.0.0.0:3260, "[::]:3260", "[fe80::be:ef]:3261" ] } } lun { example_1 { path = /dev/zvol/tank/example_1 options { naa = "0x50015178f369f093" } } } target { "iqn.2012-06.com.example:target0" { alias = "Example target" auth-group = no-authentication lun = { 0 { path = /dev/zvol/tank/example_0 blocksize = 4096 size = 4GB } } } "iqn.2012-06.com.example:target1" { auth-group = ag0 portal-group = pg0 lun { 0 = example_1 1 { path = /dev/zvol/tank/example_2 options { vendor = "FreeBSD" } } } } naa.50015178f369f092 { port = isp0 lun { 0 = example_1 } } } controller { "nqn.2012-06.com.example:controller1" { auth-group = no-authentication namespace = { 1 = example_1, 2 { backend = ramdisk size = 1G options { capacity = 1G } } } } } .Ed .Sh SEE ALSO .Xr ctl 4 , .Xr ctladm 8 , .Xr ctld 8 , .Xr zfs 8 .Sh AUTHORS The .Nm configuration file functionality for .Xr ctld 8 was developed by .An Edward Tomasz Napierala Aq Mt [email protected] under sponsorship from the FreeBSD Foundation.
