| What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/add_target | |
| Date: January 2, 2006 | |
| KernelVersion: 2.6.15 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Interface for making ib_srp connect to a new target. | |
| One can request ib_srp to connect to a new target by writing | |
| a comma-separated list of login parameters to this sysfs | |
| attribute. The supported parameters are: | |
| * id_ext, a 16-digit hexadecimal number specifying the eight | |
| byte identifier extension in the 16-byte SRP target port | |
| identifier. The target port identifier is sent by ib_srp | |
| to the target in the SRP_LOGIN_REQ request. | |
| * ioc_guid, a 16-digit hexadecimal number specifying the eight | |
| byte I/O controller GUID portion of the 16-byte target port | |
| identifier. | |
| * dgid, a 32-digit hexadecimal number specifying the | |
| destination GID. | |
| * pkey, a four-digit hexadecimal number specifying the | |
| InfiniBand partition key. | |
| * service_id, a 16-digit hexadecimal number specifying the | |
| InfiniBand service ID used to establish communication with | |
| the SRP target. How to find out the value of the service ID | |
| is specified in the documentation of the SRP target. | |
| * max_sect, a decimal number specifying the maximum number of | |
| 512-byte sectors to be transferred via a single SCSI command. | |
| * max_cmd_per_lun, a decimal number specifying the maximum | |
| number of outstanding commands for a single LUN. | |
| * io_class, a hexadecimal number specifying the SRP I/O class. | |
| Must be either 0xff00 (rev 10) or 0x0100 (rev 16a). The I/O | |
| class defines the format of the SRP initiator and target | |
| port identifiers. | |
| * initiator_ext, a 16-digit hexadecimal number specifying the | |
| identifier extension portion of the SRP initiator port | |
| identifier. This data is sent by the initiator to the target | |
| in the SRP_LOGIN_REQ request. | |
| * cmd_sg_entries, a number in the range 1..255 that specifies | |
| the maximum number of data buffer descriptors stored in the | |
| SRP_CMD information unit itself. With allow_ext_sg=0 the | |
| parameter cmd_sg_entries defines the maximum S/G list length | |
| for a single SRP_CMD, and commands whose S/G list length | |
| exceeds this limit after S/G list collapsing will fail. | |
| * allow_ext_sg, whether ib_srp is allowed to include a partial | |
| memory descriptor list in an SRP_CMD instead of the entire | |
| list. If a partial memory descriptor list has been included | |
| in an SRP_CMD the remaining memory descriptors are | |
| communicated from initiator to target via an additional RDMA | |
| transfer. Setting allow_ext_sg to 1 increases the maximum | |
| amount of data that can be transferred between initiator and | |
| target via a single SCSI command. Since not all SRP target | |
| implementations support partial memory descriptor lists the | |
| default value for this option is 0. | |
| * sg_tablesize, a number in the range 1..2048 specifying the | |
| maximum S/G list length the SCSI layer is allowed to pass to | |
| ib_srp. Specifying a value that exceeds cmd_sg_entries is | |
| only safe with partial memory descriptor list support enabled | |
| (allow_ext_sg=1). | |
| What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev | |
| Date: January 2, 2006 | |
| KernelVersion: 2.6.15 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: HCA name (<hca>). | |
| What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/port | |
| Date: January 2, 2006 | |
| KernelVersion: 2.6.15 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: HCA port number (<port_number>). | |
| What: /sys/class/scsi_host/host<n>/allow_ext_sg | |
| Date: May 19, 2011 | |
| KernelVersion: 2.6.39 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Whether ib_srp is allowed to include a partial memory | |
| descriptor list in an SRP_CMD when communicating with an SRP | |
| target. | |
| What: /sys/class/scsi_host/host<n>/cmd_sg_entries | |
| Date: May 19, 2011 | |
| KernelVersion: 2.6.39 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Maximum number of data buffer descriptors that may be sent to | |
| the target in a single SRP_CMD request. | |
| What: /sys/class/scsi_host/host<n>/dgid | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: InfiniBand destination GID used for communication with the SRP | |
| target. Differs from orig_dgid if port redirection has happened. | |
| What: /sys/class/scsi_host/host<n>/id_ext | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Eight-byte identifier extension portion of the 16-byte target | |
| port identifier. | |
| What: /sys/class/scsi_host/host<n>/ioc_guid | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Eight-byte I/O controller GUID portion of the 16-byte target | |
| port identifier. | |
| What: /sys/class/scsi_host/host<n>/local_ib_device | |
| Date: November 29, 2006 | |
| KernelVersion: 2.6.19 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Name of the InfiniBand HCA used for communicating with the | |
| SRP target. | |
| What: /sys/class/scsi_host/host<n>/local_ib_port | |
| Date: November 29, 2006 | |
| KernelVersion: 2.6.19 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Number of the HCA port used for communicating with the | |
| SRP target. | |
| What: /sys/class/scsi_host/host<n>/orig_dgid | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: InfiniBand destination GID specified in the parameters | |
| written to the add_target sysfs attribute. | |
| What: /sys/class/scsi_host/host<n>/pkey | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: A 16-bit number representing the InfiniBand partition key used | |
| for communication with the SRP target. | |
| What: /sys/class/scsi_host/host<n>/req_lim | |
| Date: October 20, 2010 | |
| KernelVersion: 2.6.36 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Number of requests ib_srp can send to the target before it has | |
| to wait for more credits. For more information see also the | |
| SRP credit algorithm in the SRP specification. | |
| What: /sys/class/scsi_host/host<n>/service_id | |
| Date: June 17, 2006 | |
| KernelVersion: 2.6.17 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: InfiniBand service ID used for establishing communication with | |
| the SRP target. | |
| What: /sys/class/scsi_host/host<n>/zero_req_lim | |
| Date: September 20, 2006 | |
| KernelVersion: 2.6.18 | |
| Contact: linux-rdma@vger.kernel.org | |
| Description: Number of times the initiator had to wait before sending a | |
| request to the target because it ran out of credits. For more | |
| information see also the SRP credit algorithm in the SRP | |
| specification. |