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Based on kernel version 3.9. Page generated on 2013-05-02 22:52 EST.

1	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/add_target
2	Date:		January 2, 2006
3	KernelVersion:	2.6.15
4	Contact:	linux-rdma@vger.kernel.org
5	Description:	Interface for making ib_srp connect to a new target.
6			One can request ib_srp to connect to a new target by writing
7			a comma-separated list of login parameters to this sysfs
8			attribute. The supported parameters are:
9			* id_ext, a 16-digit hexadecimal number specifying the eight
10			  byte identifier extension in the 16-byte SRP target port
11			  identifier. The target port identifier is sent by ib_srp
12			  to the target in the SRP_LOGIN_REQ request.
13			* ioc_guid, a 16-digit hexadecimal number specifying the eight
14			  byte I/O controller GUID portion of the 16-byte target port
15			  identifier.
16			* dgid, a 32-digit hexadecimal number specifying the
17			  destination GID.
18			* pkey, a four-digit hexadecimal number specifying the
19			  InfiniBand partition key.
20			* service_id, a 16-digit hexadecimal number specifying the
21			  InfiniBand service ID used to establish communication with
22			  the SRP target. How to find out the value of the service ID
23			  is specified in the documentation of the SRP target.
24			* max_sect, a decimal number specifying the maximum number of
25			  512-byte sectors to be transferred via a single SCSI command.
26			* max_cmd_per_lun, a decimal number specifying the maximum
27			  number of outstanding commands for a single LUN.
28			* io_class, a hexadecimal number specifying the SRP I/O class.
29			  Must be either 0xff00 (rev 10) or 0x0100 (rev 16a). The I/O
30			  class defines the format of the SRP initiator and target
31			  port identifiers.
32			* initiator_ext, a 16-digit hexadecimal number specifying the
33			  identifier extension portion of the SRP initiator port
34			  identifier. This data is sent by the initiator to the target
35			  in the SRP_LOGIN_REQ request.
36			* cmd_sg_entries, a number in the range 1..255 that specifies
37			  the maximum number of data buffer descriptors stored in the
38			  SRP_CMD information unit itself. With allow_ext_sg=0 the
39			  parameter cmd_sg_entries defines the maximum S/G list length
40			  for a single SRP_CMD, and commands whose S/G list length
41			  exceeds this limit after S/G list collapsing will fail.
42			* allow_ext_sg, whether ib_srp is allowed to include a partial
43			  memory descriptor list in an SRP_CMD instead of the entire
44			  list. If a partial memory descriptor list has been included
45			  in an SRP_CMD the remaining memory descriptors are
46			  communicated from initiator to target via an additional RDMA
47			  transfer. Setting allow_ext_sg to 1 increases the maximum
48			  amount of data that can be transferred between initiator and
49			  target via a single SCSI command. Since not all SRP target
50			  implementations support partial memory descriptor lists the
51			  default value for this option is 0.
52			* sg_tablesize, a number in the range 1..2048 specifying the
53			  maximum S/G list length the SCSI layer is allowed to pass to
54			  ib_srp. Specifying a value that exceeds cmd_sg_entries is
55			  only safe with partial memory descriptor list support enabled
56			  (allow_ext_sg=1).
57	
58	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev
59	Date:		January 2, 2006
60	KernelVersion:	2.6.15
61	Contact:	linux-rdma@vger.kernel.org
62	Description:	HCA name (<hca>).
63	
64	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/port
65	Date:		January 2, 2006
66	KernelVersion:	2.6.15
67	Contact:	linux-rdma@vger.kernel.org
68	Description:	HCA port number (<port_number>).
69	
70	What:		/sys/class/scsi_host/host<n>/allow_ext_sg
71	Date:		May 19, 2011
72	KernelVersion:	2.6.39
73	Contact:	linux-rdma@vger.kernel.org
74	Description:	Whether ib_srp is allowed to include a partial memory
75			descriptor list in an SRP_CMD when communicating with an SRP
76			target.
77	
78	What:		/sys/class/scsi_host/host<n>/cmd_sg_entries
79	Date:		May 19, 2011
80	KernelVersion:	2.6.39
81	Contact:	linux-rdma@vger.kernel.org
82	Description:	Maximum number of data buffer descriptors that may be sent to
83			the target in a single SRP_CMD request.
84	
85	What:		/sys/class/scsi_host/host<n>/dgid
86	Date:		June 17, 2006
87	KernelVersion:	2.6.17
88	Contact:	linux-rdma@vger.kernel.org
89	Description:	InfiniBand destination GID used for communication with the SRP
90			target. Differs from orig_dgid if port redirection has happened.
91	
92	What:		/sys/class/scsi_host/host<n>/id_ext
93	Date:		June 17, 2006
94	KernelVersion:	2.6.17
95	Contact:	linux-rdma@vger.kernel.org
96	Description:	Eight-byte identifier extension portion of the 16-byte target
97			port identifier.
98	
99	What:		/sys/class/scsi_host/host<n>/ioc_guid
100	Date:		June 17, 2006
101	KernelVersion:	2.6.17
102	Contact:	linux-rdma@vger.kernel.org
103	Description:	Eight-byte I/O controller GUID portion of the 16-byte target
104			port identifier.
105	
106	What:		/sys/class/scsi_host/host<n>/local_ib_device
107	Date:		November 29, 2006
108	KernelVersion:	2.6.19
109	Contact:	linux-rdma@vger.kernel.org
110	Description:	Name of the InfiniBand HCA used for communicating with the
111			SRP target.
112	
113	What:		/sys/class/scsi_host/host<n>/local_ib_port
114	Date:		November 29, 2006
115	KernelVersion:	2.6.19
116	Contact:	linux-rdma@vger.kernel.org
117	Description:	Number of the HCA port used for communicating with the
118			SRP target.
119	
120	What:		/sys/class/scsi_host/host<n>/orig_dgid
121	Date:		June 17, 2006
122	KernelVersion:	2.6.17
123	Contact:	linux-rdma@vger.kernel.org
124	Description:	InfiniBand destination GID specified in the parameters
125			written to the add_target sysfs attribute.
126	
127	What:		/sys/class/scsi_host/host<n>/pkey
128	Date:		June 17, 2006
129	KernelVersion:	2.6.17
130	Contact:	linux-rdma@vger.kernel.org
131	Description:	A 16-bit number representing the InfiniBand partition key used
132			for communication with the SRP target.
133	
134	What:		/sys/class/scsi_host/host<n>/req_lim
135	Date:		October 20, 2010
136	KernelVersion:	2.6.36
137	Contact:	linux-rdma@vger.kernel.org
138	Description:	Number of requests ib_srp can send to the target before it has
139			to wait for more credits. For more information see also the
140			SRP credit algorithm in the SRP specification.
141	
142	What:		/sys/class/scsi_host/host<n>/service_id
143	Date:		June 17, 2006
144	KernelVersion:	2.6.17
145	Contact:	linux-rdma@vger.kernel.org
146	Description:	InfiniBand service ID used for establishing communication with
147			the SRP	target.
148	
149	What:		/sys/class/scsi_host/host<n>/zero_req_lim
150	Date:		September 20, 2006
151	KernelVersion:	2.6.18
152	Contact:	linux-rdma@vger.kernel.org
153	Description:	Number of times the initiator had to wait before sending a
154			request to the target because it ran out of credits. For more
155			information see also the SRP credit algorithm in the SRP
156			specification.
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