User Manual

Driver FeaturesRev 2.0-3.0.0

Mellanox Technologies

srp_daemon

The srp_daemon utility is based on ibsrpdm and extends its functionality. In addition to the ibsr-

pdm functionality described above, srp_daemon can also

• Establish an SRP connection by itself (without the need to issue the “echo” command

described in Section 4.1.2.2)

• Continue running in background, detecting new targets and establishing SRP connec-

tions with them (daemon mode)

• Discover reachable SRP Targets given an infiniband HCA name and port, rather than

just by

/dev/umad<N> where <N> is a digit

• Enable High Availability operation (together with Device-Mapper Multipath)

• Have a configuration file that determines the targets to connect to

1. srp_daemon commands equivalent to ibsrpdm:

2. srp_daemon extensions to ibsrpdm

• To discover SRP Targets reachable from the HCA device <InfiniBand HCA name> and

the port <port num>, (and to generate output suitable for 'echo',) you may execute:

• To both discover the SRP Targets and establish connections with them, just add the -e

option to the above command.

• Executing srp_daemon over a port without the -a option will only display the reachable

targets via the port and to which the initiator is not connected. If executing with the -e

option it is better to omit -a.

• It is recommended to use the -n option. This option adds the initiator_ext to the connecting

string. (See

Section 4.1.2.5 for more details).

• srp_daemon has a configuration file that can be set, where the default is /etc/

srp_daemon.conf. Use the -f to supply a different configuration file that configures the tar

gets srp_daemon is allowed to connect to. The configuration file can also be used to set

values for additional parameters (e.g., max_cmd_per_lun, max_sect).

• A continuous background (daemon) operation, providing an automatic ongoing detection

and connection capability. See

Section 4.1.2.4.

"srp_daemon -a -o" is equivalent to "ibsrpdm"

"srp_daemon -c -a -o" is equivalent to "ibsrpdm -c"

These srp_daemon commands can behave differently than the equivalent

ibsrpdm command when /etc/srp_daemon.conf is not empty.

host1# srp_daemon -c -a -o -i <InfiniBand HCA name> -p <port number>

To obtain the list of InfiniBand HCA device names, you can either use the ibstat tool or

run ‘ls /sys/class/infiniband’.