Ubuntu Manpage: srp_daemon - Discovers SRP targets in an InfiniBand Fabric

NAME

       srp_daemon - Discovers SRP targets in an InfiniBand Fabric

SYNOPSIS

       srp_daemon  [-vVcaeon] [-d umad-device | -i infiniband-device [-p port-num] | -j dev:port]
       [-t timeout(ms)] [-r retries] [-R rescan-time] [-f rules-file]

DESCRIPTION

       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 and 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 an SRP target. When there
       is a change of capabilities, srp_daemon checks if the  machine  has  turned  into  an  SRP
       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 should connect to this target  according
       to  its  rules  (the  default  rules  file  is  /etc/srp_daemon.conf) and if it is already
       connected to the local port. If it should  connect  to  this  target  and  if  it  is  not
       connected yet, srp_daemon can either print the target details or connect to it.

OPTIONS

-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 nor with -j.

-p port-num
Work on port port-num (default 1). This option must be used with -i and should not
be used with -d nor with -j.

-j dev:port
Work on port number port of InfiniBand device dev. This option should not be used
with -d, -i nor with -p.

-d umad-device
Use device file umad-device (default /dev/infiniband/umad0) This option should not
be used with -i, -p nor with -j.

-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. This is the same behavior as that of ibsrpdm.

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

-o Perform only one rescan and exit just like ibsrpdm.

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

-T retry-timeout
Retries to connect to existing target after retry-timeout seconds. If -R is not
specified, uses 5 Seconds timeout. if retry-timeout is 0, will not try to
reconnect. The reason srp_daemon retries to connect to the target is because there
may be a rare scnerio in which srp_daemon will try to connect to add a target when
the target is about to be removed, but is not removed yet.

-f rules-file
Decide to which targets to connect according to the rules in rules-file. If -f is
not specified, uses the default rules file /etc/srp_daemon.conf. Each line in the
rules-file is a rule which can be either an allow connection or a disallow
connection according to the first character in the line (a or d accordingly). The
rest of the line is values for id_ext, ioc_guid, dgid, service_id. Please take a
look at the example section for an example of the file. srp_daemon decide whether
to allow or disallow each target according to first rule that match the target. If
no rule matches the target, the target is allowed and will be connected. In an
allow rule it is possible to set attributes for the connection to the target.
Supported attributes are max_cmd_per_lun and max_sect.

-t timeout
Use timeout of timeout 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.

--systemd
Enable systemd integration.

FILES

       /etc/srp_daemon.conf - Default rules configuration file that indicates to which targets to
       connect.  Can  be  overridden using the -f rules-file option.  Each line in this file is a
       rule which can be either an allow connection or a disallow  connection  according  to  the
       first  character  in  the  line  (a  or d accordingly). The rest of the line is values for
       id_ext, ioc_guid, dgid, service_id. Please take a look  at  the  example  section  for  an
       example  of the file. srp_daemon decide whether to allow or disallow each target according
       to first rule that match the target. If no rule matches the target, the target is  allowed
       and  will  be  connected.  In  an  allow  rule  it  is  possible to set attributes for the
       connection to the target. Supported attributes are max_cmd_per_lun and max_sect.

EXAMPLES

       srp_daemon -e -i mthca0 -p 1 -R 60 (Connects to the targets accessible through port  1  of
       mthca0. Performs a complete rescan every minute)

       srp_daemon -o -c -a          (Prints the connection commands for the targets in the fabric
       and exits - similar to ibsrpdm)

       srp_daemon -e -f rules.txt        (Connects to the  targets  allowed  in  the  rules  file
       rules.txt)

       An example for a rules configuration file (such as /etc/srp_daemon.conf)
       ------------------------------------------------------------------------
       # Rules file example
       # This is a comment
       # disallow the following dgid
       d       dgid=fe800000000000000002c90200402bd5
       # allow target with the following ioc_guid
       a       ioc_guid=00a0b80200402bd7
       # allow target with the following id_ext and ioc_guid. And setting max_cmd_per_lun to 31.
       a       id_ext=200500A0B81146A1,ioc_guid=00a0b80200402bef,max_cmd_per_lun=31
       # disallow all the rest
       d

AUTHORS

       Roland Dreier
              <rolandd@cisco.com>

       Ishai Rabinovitz
              <ishai@mellanox.co.il>