Discovers and connects to InfiniBand SCSI RDMA Protocol (SRP) targets in an IB fabric.

Each srp_daemon instance operates on one local port. Upon boot it performs a full rescan of the fabric then waits for an srp_daemon event. An srp_daemon event can be a join of a new machine to the fabric, a change in the capabilities of a machine, an SA change, or an expiration of a predefined timeout.

When a new machine joins the fabric, srp_daemon checks if it is a target. When there is a change of capabilities, srp_daemon checks if the machine has turned into a target. When there is an SA change or a timeout expiration, srp_daemon performs a full rescan of the fabric.

For each target srp_daemon finds, it checks if it is already connected to the local port. If it is not connected, srp_daemon can either print the target details or connect to it.

-v

Print more verbose output

-V

Print even more verbose output (debug mode)

-i infiniband-device

Work on infiniband-device. This option should not be used with -d.

-p port-num

Work on port port-num (default 1). This option must be used with -i and should not be used with -d.

-d umad-device

Use device file umad-device (default /dev/infiniband/umad0) This option should not be used with -i or -p.

-c

Generate output suitable for piping directly to a /sys/class/infiniband_srp/srp-<device>-<port>/add_target file.

-a

Prints all the targets in the fabric, not only targets that are not connected through the local port. (The same as ibsrpdm.)

-e

Execute the connection command, i.e., make the connection to the target.

-o

Perform only one rescan and exit. (The same as ibsrpdm.)

-R Rescan-time

Force a complete rescan every Rescan-time seconds. If -R is not specified, no timeout rescans will be performed.

-t timoeout

Use timeout of timoeout msec for MAD responses (default: 5 sec).

-r retries

Perform retries retries on each send to MAD (default: 3 retries).

-n

New format - use also initiator_ext in the connection command.

Roland Dreier

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Ishai Rabinovitz

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