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CTL.CONF(5) File Formats Manual CTL.CONF(5) NAME ctl.conf -- CAM Target Layer / iSCSI target daemon configuration file DESCRIPTION The ctl.conf configuration file is used by the ctld(8) daemon. Lines starting with `#' are interpreted as comments. The general syntax of the ctl.conf file is: pidfile path auth-group name { chap user secret ... } portal-group name { listen address discovery-auth-group name ... } target name { auth-group name portal-group name lun number { path path } ... } Global Context auth-group name Create an auth-group configuration context, defining a new auth-group, which can then be assigned to any number of tar- gets. debug level The debug verbosity level. The default is 0. maxproc number The limit for concurrently running child processes handling in- coming connections. The default is 30. A setting of 0 dis- ables the limit. pidfile path The path to the pidfile. The default is /var/run/ctld.pid. portal-group name Create a portal-group configuration context, defining a new portal-group, which can then be assigned to any number of tar- gets. lun name Create a lun configuration context, defining a LUN to be ex- ported by any number of targets. target name Create a target configuration context, which can optionally contain one or more lun contexts. timeout 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. isns-server address An IPv4 or IPv6 address and optionally port of iSNS server to register on. isns-period seconds iSNS registration period. Registered Network Entity not up- dated during this period will be unregistered. The default is 900. isns-timeout seconds Timeout for iSNS requests. The default is 5. auth-group Context auth-type type Sets the authentication type. Type can be either "none", "deny", "chap", or "chap-mutual". In most cases it is not nec- essary to set the type using this clause; it is usually used to disable authentication for a given auth-group. chap user secret A set of CHAP authentication credentials. Note that for any auth-group, the configuration may only contain either chap or chap-mutual entries; it is an error to mix them. chap-mutual user secret mutualuser mutualsecret A set of mutual CHAP authentication credentials. Note that for any auth-group, the configuration may only contain either chap or chap-mutual entries; it is an error to mix them. initiator-name 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. initiator-portal address[/prefixlen] An iSCSI initiator portal: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only initia- tors with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no re- strictions based on initiator address. portal-group Context discovery-auth-group name Assign a previously defined authentication group to the portal group, to be used for target discovery. By default, portal groups are assigned predefined auth-group "default", which de- nies discovery. Another predefined auth-group, "no-authentication", may be used to permit discovery without authentication. discovery-filter filter Determines which targets are returned during discovery. Filter can be either "none", "portal", "portal-name", or "portal-name-auth". When set to "none", discovery will return all targets assigned to that portal group. When set to "portal", discovery will not return targets that cannot be ac- cessed by the initiator because of their initiator-portal. When set to "portal-name", the check will include both initiator-portal and initiator-name. When set to "portal-name-auth", the check will include initiator-portal, 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 "portal-name-auth", targets that require CHAP authentication will only be returned if discovery-auth-group requires CHAP. The default is "none". listen address An IPv4 or IPv6 address and port to listen on for incoming con- nections. offload driver Define iSCSI hardware offload driver to use for this portal-group. The default is "none". option name value The CTL-specific port options passed to the kernel. redirect address IPv4 or IPv6 address to redirect initiators to. When config- ured, all initiators attempting to connect to portal belonging to this portal-group will get redirected using "Target moved temporarily" login response. Redirection happens before au- thentication and any initiator-name or initiator-portal checks are skipped. tag value Unique 16-bit tag value of this portal-group. If not speci- fied, the value is generated automatically. foreign Specifies that this portal-group is listened by some other host. This host will announce it on discovery stage, but won't listen. dscp 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 "CSx" and "AFxx" codepoints. pcp value The 802.1Q Priority CodePoint used for sending packets. The PCP can be set to a value in the range between "0" to "7". When omitted, the default for the outgoing interface is used. target Context alias text Assign a human-readable description to the target. There is no default. auth-group name Assign a previously defined authentication group to the target. By default, targets that do not specify their own auth set- tings, using clauses such as chap or initiator-name, are as- signed predefined auth-group "default", which denies all ac- cess. Another predefined auth-group, "no-authentication", may be used to permit access without authentication. Note that this clause can be overridden using the second argument to a portal-group clause. auth-type type Sets the authentication type. Type can be either "none", "deny", "chap", or "chap-mutual". In most cases it is not nec- essary to set the type using this clause; it is usually used to disable authentication for a given target. This clause is mu- tually exclusive with auth-group; one cannot use both in a sin- gle target. chap user secret A set of CHAP authentication credentials. Note that targets must only use one of auth-group, chap, or chap-mutual; it is a configuration error to mix multiple types in one target. chap-mutual user secret mutualuser mutualsecret A set of mutual CHAP authentication credentials. Note that targets must only use one of auth-group, chap, or chap-mutual; it is a configuration error to mix multiple types in one tar- get. initiator-name 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 auth-group; one cannot use both in a single target. initiator-portal address[/prefixlen] An iSCSI initiator portal: an IPv4 or IPv6 address, optionally followed by a literal slash and a prefix length. Only initia- tors with an address matching one of the defined addresses will be allowed to connect. If not defined, there will be no re- strictions based on initiator address. This clause is mutually exclusive with auth-group; one cannot use both in a single tar- get. The auth-type, chap, chap-mutual, initiator-name, and initiator-portal clauses in the target context provide an al- ternative to assigning an auth-group defined separately, useful in the common case of authentication settings specific to a single target. portal-group name [ag-name] Assign a previously defined portal group to the target. The default portal group is "default", which makes the target available on TCP port 3260 on all configured IPv4 and IPv6 ad- dresses. Optional second argument specifies auth-group for connections to this specific portal group. If second argument is not specified, target auth-group is used. port name port name/pp port 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 ctladm portlist command to retrieve the list of available ports. On startup ctld(8) configures LUN mapping and enables all assigned ports. Each port can be assigned to only one target. redirect address IPv4 or IPv6 address to redirect initiators to. When config- ured, all initiators attempting to connect to this target will get redirected using "Target moved temporarily" login response. Redirection happens after successful authentication. lun number name Export previously defined lun by the parent target. lun number Create a lun configuration context, defining a LUN exported by the parent target. This is an alternative to defining the LUN separately, useful in the common case of a LUN being exported by a single target. lun Context backend block | ramdisk The CTL backend to use for a given LUN. Valid choices are "block" and "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. blocksize size The blocksize visible to the initiator. The default blocksize is 512 for disks, and 2048 for CD/DVDs. ctl-lun 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 configura- tions. device-id string The SCSI Device Identification string presented to the initia- tor. device-type 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. option name value The CTL-specific options passed to the kernel. All CTL-spe- cific options are documented in the "OPTIONS" section of ctladm(8). path path The path to the file, device node, or zfs(8) volume used to back the LUN. For optimal performance, create the volume with the "volmode=dev" property set. serial string The SCSI serial number presented to the initiator. size size The LUN size, in bytes or by number with a suffix of K, M, G, T (for kilobytes, megabytes, gigabytes, or terabytes). When the configuration is in UCL format, use the suffix format kKmMgG|bB, (i.e., 4GB, 4gb, and 4Gb are all equivalent). FILES /etc/ctl.conf The default location of the ctld(8) configuration file. EXAMPLES 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 } An equivalent configuration in UCL format, for use with -u: 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_0 { path = /dev/zvol/tank/example_0 blocksize = 4096 size = 4GB } example_1 { path = /dev/zvol/tank/example_1 options { naa = "0x50015178f369f093" } } example_2 { path = /dev/zvol/tank/example_2 options { vendor = "FreeBSD" } } } target { "iqn.2012-06.com.example:target0" { alias = "Example target" auth-group = no-authentication lun = [ { number = 0, name = example_0 }, ] } "iqn.2012-06.com.example:target1" { auth-group = ag0 portal-group { name = pg0 } lun = [ { number = 0, name = example_1 }, { number = 1, name = example_2 } ] } naa.50015178f369f092 { port = isp0 lun = [ { number = 0, name = example_1 } ] } } SEE ALSO ctl(4), ctladm(8), ctld(8), zfs(8) AUTHORS The ctl.conf configuration file functionality for ctld(8) was developed by Edward Tomasz Napierala <trasz@FreeBSD.org> under sponsorship from the FreeBSD Foundation. FreeBSD 14.3 October 13, 2020 CTL.CONF(5)
NAME | DESCRIPTION | FILES | EXAMPLES | SEE ALSO | AUTHORS
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