2025-02-16 12:41:59 +01:00
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# Copyright (c) 2021, Dell Inc. or its subsidiaries. All rights reserved.
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# SPDX-License-Identifier: Apache-2.0
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# See the LICENSE file for details.
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#
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# This file is part of NVMe STorage Appliance Services (nvme-stas).
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# ==============================================================================
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# STorage Appliance Connector Daemon (stacd) - configuration file
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#
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# In this file, options that are commented represent the default values used.
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# Uncommented options override the default value.
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[Global]
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# tron: Trace-ON. Enable additional debug info
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# Type: boolean
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# Range: [false, true]
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#tron=false
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# hdr-digest: Protocol Data Unit (PDU) Header Digest. NVMe/TCP facilitates an
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# optional PDU Header digest. Digests are calculated using the
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# CRC32C algorithm.
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# Type: boolean
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# Range: [false, true]
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#hdr-digest=false
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# data-digest: Protocol Data Unit (PDU) Data Digest. NVMe/TCP facilitates an
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# optional PDU Data digest. Digests are calculated using the
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# CRC32C algorithm.
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# Type: boolean
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# Range: [false, true]
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#data-digest=false
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# kato: Keep Alive Timeout (KATO): This field specifies the timeout value
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# for the Keep Alive feature in seconds. The default value for this
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2025-02-16 12:53:58 +01:00
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# field is 120 seconds (2 minutes).
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2025-02-16 12:41:59 +01:00
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# Type: Unsigned integer
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# Range: 0..N
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# Unit: Seconds
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2025-02-16 12:53:58 +01:00
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#kato=120
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2025-02-16 12:41:59 +01:00
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# nr-io-queues: Overrides the default number of I/O queues create by the
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# driver.
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# Type: Unsigned integer
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# Range: 1..N
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# Default: Depends on kernel and other run time
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# factors (e.g. number of CPUs).
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# nr-write-queues: Adds additional queues that will be used for write I/O.
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# Type: Unsigned integer
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# Range: 1..N
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# Default: Depends on kernel and other run time
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# factors (e.g. number of CPUs).
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# nr-poll-queues: Adds additional queues that will be used for polling
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# latency sensitive I/O.
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# Type: Unsigned integer
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# Range: 1..N
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# Default: Depends on kernel and other run time
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# factors (e.g. number of CPUs).
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# queue-size: Overrides the default number of elements in the I/O queues
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# created by the driver.
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# Type: Unsigned integer
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# Range: 16..1024
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# Default: 128
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#queue-size=128
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# reconnect-delay: Overrides the default delay, in seconds, before reconnect
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# is attempted after a connect loss.
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# Type: Unsigned integer
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# Range: 1..N
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# Unit: Seconds
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# Default: 10 (retry to connect every 10 seconds)
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#reconnect-delay=10
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# ctrl-loss-tmo: Overrides the default controller loss timeout period in
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# seconds.
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# Type: Unsigned integer
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# Range: -1, 0..N where -1 means retry forever
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# Unit: Seconds
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# Default: 600 (retry to connect for up to 10 minutes)
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#ctrl-loss-tmo=600
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# disable-sqflow: Disables SQ flow control to omit head doorbell update for
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# submission queues when sending nvme completions.
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# Type: boolean
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# Range: [false, true]
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# Default: false
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#disable-sqflow=false
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# ignore-iface: This option controls whether connections with I/O Controllers
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# (IOC) will be forced on a specific interface or will rely on
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# the routing tables to determine the interface.
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#
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# See the man pages for details: man stacd.conf
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#
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# Type: boolean
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# Range: [false, true]
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# Default: true
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#ignore-iface=false
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# ip-family: With this you can specify whether stacd will support IPv4, IPv6,
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# or both when connecting to I/O Controllers (IOC).
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#
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# See the man pages for details: man stacd.conf
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#
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# Type: String
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# Range: [ipv4, ipv6, ipv4+ipv6]
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# Default: ipv4+ipv6
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#ip-family=ipv4+ipv6
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# ==============================================================================
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[I/O controller connection management]
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# This section contains parameters to manage I/O controller connections.
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# For example, parameters are provided to control disconnect policy. In other
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# words, whether stacd will disconnect from IOCs on DLPE removal and which
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# connections will be affected.
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#
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# Also, what should stacd do when a DLPE NCC bit (Not Connected to CDC) is
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# asserted. Should stacd stop trying to connect to an I/O controller after a
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# certain number of unsuccessful attempts.
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#
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# See the man pages for details: man stacd.conf
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# disconnect-scope: Determines which connections, if any, will be the target of
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# a potential disconnect on DLPE removal.
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#
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# Type: String
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# Range: [only-stas-connections | all-connections-matching-disconnect-trtypes | no-disconnect]
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# Default: only-stas-connections
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#disconnect-scope=only-stas-connections
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# disconnect-trtypes: Specify which connections should be audited based on the
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# transport type. This parameter only applies when
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# "disconnect-scope = all-connections-matching-disconnect-trtypes".
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#
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# Type: String
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# Range: [tcp, rdma, fc, tcp+rdma, tcp+fc, rdma+fc, tcp+rdma+fc]
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# Default: tcp
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#disconnect-trtypes=tcp
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# connect-attempts-on-ncc: The NCC bit (Not Connected to CDC) returned in a
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# DLPE indicates whether a connection is currently
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# established between the CDC and the subsystem listed
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# in the DLPE.
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#
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# When the NCC bit is asserted, it may mean that the
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# subsystem is offline or that fabrics connectivity is
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# momentarily lost. If the host is also unable to
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# connect to the subsystem, then there is no point in
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# continuing to try to connect. In fact, the CDC will
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# monitor the situation an inform the host (AEN) when
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# connectivity is restored.
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#
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# This field is used to tell stacd how to behave when
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# the NCC bit is asserted. How many times should it try
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# to connect before give-up, or whether to keep trying
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# indefinitely.
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#
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# Type: Integer
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# Range: [0, 2..N], 0 means "Never stop trying". A
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# non-0 value indicates the number of attempts
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# before giving up. This value should never be
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# set to 1. A value of 1 will automatically be
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# increased to 2. That's because a single
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# failure may be normal and a mimimum of 2
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# attempts is required to conclude that a
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# connection is not possible.
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# Default: 0
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#connect-attempts-on-ncc=0
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# ==============================================================================
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[Controllers]
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# controller: I/O Controllers (IOC) are specified with this keyword.
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#
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# Syntax:
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# controller = transport=<trtype>;traddr=<traddr>;trsvcid=<trsvcid>;host-traddr=<traddr>;host-iface=<iface>,nqn=<subnqn>
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#
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# transport=<trtype> [MANDATORY]
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# This field specifies the network fabric being used for a NVMe-over-
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# Fabrics network. Current string values include:
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#
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# Value Definition
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# ------- -----------------------------------------------------------
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# rdma The network fabric is an rdma network (RoCE, iWARP, Infiniband, basic rdma, etc)
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# fc The network fabric is a Fibre Channel network.
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# tcp The network fabric is a TCP/IP network.
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# loop Connect to a NVMe over Fabrics target on the local host
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#
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# traddr=<traddr> [MANDATORY]
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# This field specifies the network address of the Controller. For
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# transports using IP addressing (e.g. rdma) this should be an IP-
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# based address (ex. IPv4, IPv6). It could also be a resolvable host
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# name (e.g. localhost).
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#
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# nqn=<subnqn> [MANDATORY]
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# This field specifies the Subsystem's NVMe Qualified Name.
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#
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# trsvcid=<trsvcid> [OPTIONAL]
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# This field specifies the transport service id. For transports using
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# IP addressing (e.g. rdma) this field is the port number.
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#
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# Depending on the transport type, this field will default to either
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# 8009 or 4420 as follows.
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#
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# UDP port 4420 and TCP port 4420 have been assigned by IANA
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# for use by NVMe over Fabrics. NVMe/RoCEv2 controllers use UDP port
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# 4420 by default. NVMe/iWARP controllers use TCP port 4420 by
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# default.
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#
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# TCP port 4420 has been assigned for use by NVMe over Fabrics and TCP
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# port 8009 has been assigned by IANA for use by NVMe over Fabrics
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# discovery. TCP port 8009 is the default TCP port for NVMe/TCP
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# discovery controllers. There is no default TCP port for NVMe/TCP I/O
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# controllers, the Transport Service Identifier (TRSVCID) field in the
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# Discovery Log Entry indicates the TCP port to use.
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#
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# The TCP ports that may be used for NVMe/TCP I/O controllers include
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# TCP port 4420, and the Dynamic and/or Private TCP ports (i.e., ports
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# in the TCP port number range from 49152 to 65535). NVMe/TCP I/O
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# controllers should not use TCP port 8009. TCP port 4420 shall not be
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# used for both NVMe/iWARP and NVMe/TCP at the same IP address on the
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# same network.
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#
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# host-traddr=<traddr> [OPTIONAL]
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# This field specifies the network address used on the host to connect
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# to the Controller. For TCP, this sets the source address on the
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# socket.
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#
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# host-iface=<iface> [OPTIONAL]
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# This field specifies the network interface used on the host to
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# connect to the Controller (e.g. IP eth1, enp2s0, enx78e7d1ea46da).
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# This forces the connection to be made on a specific interface
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# instead of letting the system decide.
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#
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# dhchap-ctrl-secret [OPTIONAL]
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# NVMe In-band authentication controller secret (i.e. key) for
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# bi-directional authentication; needs to be in ASCII format as
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# specified in NVMe 2.0 section 8.13.5.8 'Secret representation'.
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# Bi-directional authentication will be attempted when present.
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#
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# hdr-digest [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# data-digest [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# nr-io-queues [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# nr-write-queues [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# nr-poll-queues [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# queue-size [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# kato [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# reconnect-delay [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# ctrl-loss-tmo [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# disable-sqflow [OPTIONAL]
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# See definition in [Global] section. This is used to override
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# the value specified in the [Global] section.
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#
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# Multiple DCs may be specified on separate lines like this (this is
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# just an example and does not represent default values):
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#
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# controller = transport=tcp;traddr=localhost;nqn=nqn.1988-11.com.dell:PowerSANxxx:01:20210225100113-454f73093ceb4847a7bdfc6e34ae8e28
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# controller = transport=tcp;traddr=2001:db8::370:7334;host-iface=enp0s8;nqn=nqn.starship-enterprise
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# controller = transport=fc;traddr=nn-0x204600a098cbcac6:pn-0x204700a098cbcac6;nqn=nqn.romulan-empire
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# ...
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# Type: String
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#
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# Default: There is no default controller. STAC will not try to
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# connect to a default I/O Controller.
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#controller=
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# exclude: Excluded controllers. This keyword allows configuring I/O
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# controllers that should not be connected to (whatever the
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# reason may be).
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#
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# The syntax is the same as for "controller=", except that the key
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# host-traddr does not apply. Multiple "exclude=" keywords may
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# appear in the config file to define the exclusion list.
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#
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# Note 1: A minimal match approach is used to eliminate unwanted
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# controllers. That is, you do not need to specify all the
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# parameters to identify a controller. Just specifying the
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# host-iface, for example, can be used to exclude all controllers
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# on an interface.
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#
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# Note 2: "exclude=" takes precedence over "controller=". A
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# controller specified by the "controller=" keyword, can be
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# eliminated by the "exclude=" keyword.
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#
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# Syntax: Same as "controller=" above.
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# Type: String
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#
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# Example:
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# exclude = transport=tcp;traddr=fe80::2c6e:dee7:857:26bb # Eliminate a specific address
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# exclude = host-iface=enp0s8 # Eliminate everything on this interface
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#exclude=
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