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192 lines
7.7 KiB
192 lines
7.7 KiB
What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/add_target |
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Date: January 2, 2006 |
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KernelVersion: 2.6.15 |
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Contact: [email protected] |
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Description: Interface for making ib_srp connect to a new target. |
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One can request ib_srp to connect to a new target by writing |
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a comma-separated list of login parameters to this sysfs |
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attribute. The supported parameters are: |
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* id_ext, a 16-digit hexadecimal number specifying the eight |
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byte identifier extension in the 16-byte SRP target port |
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identifier. The target port identifier is sent by ib_srp |
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to the target in the SRP_LOGIN_REQ request. |
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* ioc_guid, a 16-digit hexadecimal number specifying the eight |
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byte I/O controller GUID portion of the 16-byte target port |
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identifier. |
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* dgid, a 32-digit hexadecimal number specifying the |
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destination GID. |
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* pkey, a four-digit hexadecimal number specifying the |
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InfiniBand partition key. |
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* service_id, a 16-digit hexadecimal number specifying the |
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InfiniBand service ID used to establish communication with |
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the SRP target. How to find out the value of the service ID |
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is specified in the documentation of the SRP target. |
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* max_sect, a decimal number specifying the maximum number of |
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512-byte sectors to be transferred via a single SCSI command. |
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* max_cmd_per_lun, a decimal number specifying the maximum |
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number of outstanding commands for a single LUN. |
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* io_class, a hexadecimal number specifying the SRP I/O class. |
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Must be either 0xff00 (rev 10) or 0x0100 (rev 16a). The I/O |
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class defines the format of the SRP initiator and target |
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port identifiers. |
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* initiator_ext, a 16-digit hexadecimal number specifying the |
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identifier extension portion of the SRP initiator port |
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identifier. This data is sent by the initiator to the target |
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in the SRP_LOGIN_REQ request. |
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* cmd_sg_entries, a number in the range 1..255 that specifies |
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the maximum number of data buffer descriptors stored in the |
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SRP_CMD information unit itself. With allow_ext_sg=0 the |
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parameter cmd_sg_entries defines the maximum S/G list length |
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for a single SRP_CMD, and commands whose S/G list length |
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exceeds this limit after S/G list collapsing will fail. |
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* allow_ext_sg, whether ib_srp is allowed to include a partial |
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memory descriptor list in an SRP_CMD instead of the entire |
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list. If a partial memory descriptor list has been included |
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in an SRP_CMD the remaining memory descriptors are |
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communicated from initiator to target via an additional RDMA |
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transfer. Setting allow_ext_sg to 1 increases the maximum |
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amount of data that can be transferred between initiator and |
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target via a single SCSI command. Since not all SRP target |
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implementations support partial memory descriptor lists the |
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default value for this option is 0. |
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* sg_tablesize, a number in the range 1..2048 specifying the |
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maximum S/G list length the SCSI layer is allowed to pass to |
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ib_srp. Specifying a value that exceeds cmd_sg_entries is |
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only safe with partial memory descriptor list support enabled |
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(allow_ext_sg=1). |
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* comp_vector, a number in the range 0..n-1 specifying the |
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MSI-X completion vector of the first RDMA channel. Some |
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HCA's allocate multiple (n) MSI-X vectors per HCA port. If |
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the IRQ affinity masks of these interrupts have been |
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configured such that each MSI-X interrupt is handled by a |
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different CPU then the comp_vector parameter can be used to |
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spread the SRP completion workload over multiple CPU's. |
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* tl_retry_count, a number in the range 2..7 specifying the |
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IB RC retry count. |
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* queue_size, the maximum number of commands that the |
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initiator is allowed to queue per SCSI host. The default |
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value for this parameter is 62. The lowest supported value |
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is 2. |
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* max_it_iu_size, a decimal number specifying the maximum |
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initiator to target information unit length. |
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What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev |
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Date: January 2, 2006 |
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KernelVersion: 2.6.15 |
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Contact: [email protected] |
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Description: HCA name (<hca>). |
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What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/port |
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Date: January 2, 2006 |
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KernelVersion: 2.6.15 |
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Contact: [email protected] |
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Description: HCA port number (<port_number>). |
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What: /sys/class/scsi_host/host<n>/allow_ext_sg |
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Date: May 19, 2011 |
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KernelVersion: 2.6.39 |
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Contact: [email protected] |
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Description: Whether ib_srp is allowed to include a partial memory |
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descriptor list in an SRP_CMD when communicating with an SRP |
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target. |
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What: /sys/class/scsi_host/host<n>/ch_count |
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Date: April 1, 2015 |
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KernelVersion: 3.19 |
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Contact: [email protected] |
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Description: Number of RDMA channels used for communication with the SRP |
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target. |
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What: /sys/class/scsi_host/host<n>/cmd_sg_entries |
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Date: May 19, 2011 |
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KernelVersion: 2.6.39 |
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Contact: [email protected] |
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Description: Maximum number of data buffer descriptors that may be sent to |
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the target in a single SRP_CMD request. |
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What: /sys/class/scsi_host/host<n>/comp_vector |
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Date: September 2, 2013 |
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KernelVersion: 3.11 |
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Contact: [email protected] |
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Description: Completion vector used for the first RDMA channel. |
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What: /sys/class/scsi_host/host<n>/dgid |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: InfiniBand destination GID used for communication with the SRP |
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target. Differs from orig_dgid if port redirection has happened. |
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What: /sys/class/scsi_host/host<n>/id_ext |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: Eight-byte identifier extension portion of the 16-byte target |
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port identifier. |
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What: /sys/class/scsi_host/host<n>/ioc_guid |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: Eight-byte I/O controller GUID portion of the 16-byte target |
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port identifier. |
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What: /sys/class/scsi_host/host<n>/local_ib_device |
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Date: November 29, 2006 |
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KernelVersion: 2.6.19 |
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Contact: [email protected] |
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Description: Name of the InfiniBand HCA used for communicating with the |
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SRP target. |
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What: /sys/class/scsi_host/host<n>/local_ib_port |
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Date: November 29, 2006 |
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KernelVersion: 2.6.19 |
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Contact: [email protected] |
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Description: Number of the HCA port used for communicating with the |
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SRP target. |
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What: /sys/class/scsi_host/host<n>/orig_dgid |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: InfiniBand destination GID specified in the parameters |
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written to the add_target sysfs attribute. |
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What: /sys/class/scsi_host/host<n>/pkey |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: A 16-bit number representing the InfiniBand partition key used |
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for communication with the SRP target. |
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What: /sys/class/scsi_host/host<n>/req_lim |
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Date: October 20, 2010 |
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KernelVersion: 2.6.36 |
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Contact: [email protected] |
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Description: Number of requests ib_srp can send to the target before it has |
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to wait for more credits. For more information see also the |
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SRP credit algorithm in the SRP specification. |
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What: /sys/class/scsi_host/host<n>/service_id |
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Date: June 17, 2006 |
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KernelVersion: 2.6.17 |
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Contact: [email protected] |
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Description: InfiniBand service ID used for establishing communication with |
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the SRP target. |
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What: /sys/class/scsi_host/host<n>/sgid |
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Date: February 1, 2014 |
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KernelVersion: 3.13 |
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Contact: [email protected] |
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Description: InfiniBand GID of the source port used for communication with |
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the SRP target. |
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What: /sys/class/scsi_host/host<n>/zero_req_lim |
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Date: September 20, 2006 |
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KernelVersion: 2.6.18 |
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Contact: [email protected] |
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Description: Number of times the initiator had to wait before sending a |
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request to the target because it ran out of credits. For more |
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information see also the SRP credit algorithm in the SRP |
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specification.
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