User Manual

Driver FeaturesRev 2.1-1.0.6

Mellanox Technologies

• 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:

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

• 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

tar

gets 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 dif

ferent 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.

4.1.2.4 Automatic Discovery and Connection to Targets

• Make sure that the ib_srp module is loaded, the SRP Initiator can reach an SRP Target,

and that an SM is running.

•

To connect to all the existing Targets in the fabric, run “

srp_daemon -e -o”. This util-

ity will scan the fabric once, connect to every Target it detects, and then exit.

• To connect to all the existing Targets in the fabric and to connect to new targets that will

join the fabric, execute srp_daemon -e. This utility continues to execute until it is either

killed by the user or encounters connection errors (such as no SM in the fabric).

• To execute SRP daemon as a daemon on all the ports:

•

srp_daemon.sh (found under /usr/sbin/). srp_daemon.sh sends its log to /var/log/

srp_daemon.log

• Start the srpd service script, run

service srpd start

• It is possible to configure this script to execute automatically when the InfiniBand

driver starts by changing the value of SRP_DAEMON_ENABLE in /etc/infiniband/

openib.conf to “yes”. However, this option also enables SRP High Availability that has

some more features – see Section 4.1.2.6).

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

run ‘ls /sys/class/infiniband’.

srp_daemon will follow the configuration it finds in /etc/srp_daemon.conf. Thus, it

will ignore a target that is disallowed in the configuration file.