martin,
there parameters are all supposed to go on one line, but yes there is
a bug where only the last parameter takes effect. i believe that bug
is captured in the database along with a suggested code fix.
## disallow all the rest
#d
a max_sect=65535,max_cmd_per_lun=4
kevin
On Jan 15, 2008, at 9:31 AM, Martin W. Schlining III wrote:
The srp_daemon used to login to SRP targets is not picking up more
than one module parameter from /etc/srp_daemon.conf. I've seen this
behavior with OFED 1.2, 1.2.5.3, and the IB software in 2.6.24-rc6.
Is this a bug or is the srp_daemon.conf not being used properly?
Here are a couple of examples:
-----------------------------------------------------------------
With one parameter on each line:
/etc/srp_daemon.conf
## This is an example rules configuration file for srp_daemon.
##
#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
#a id_ext=200500A0B81146A1,ioc_guid=00a0b80200402bef
## disallow all the rest
#d
a max_sect=65535
a max_cmd_per_lun=4
fury:~ # modprobe -r ib_srp
fury:~ # modprobe ib_srp
fury:~ # srp_daemon -o -e /dev/infiniband/umad0
fury:~ # lsscsi
[0:0:0:0] disk SEAGATE ST373455SS S513 /dev/sda
[26:0:0:0] disk DDN S2A 9550 3.10 /dev/sdb
fury:~ # cat /sys/block/sdb/queue/max_hw_sectors_kb
32767
fury:~ # cat /sys/class/infiniband_srp/srp-mthca0-1/device/host26/
scsi_host\:host26/cmd_per_lun
63
fury:~ #
max_sect was picked up, but max_cmd_per_lun is still the default.
------------------------------------------------------------------
With both parameters on one line seperated by a comma:
## This is an example rules configuration file for srp_daemon.
##
#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
#a id_ext=200500A0B81146A1,ioc_guid=00a0b80200402bef
## disallow all the rest
#d
a max_sect=65535,max_cmd_per_lun=4
fury:~ # modprobe -r ib_srp
fury:~ # modprobe ib_srp
fury:~ # srp_daemon -o -e /dev/infiniband/umad0
fury:~ # lsscsi
[0:0:0:0] disk SEAGATE ST373455SS S513 /dev/sda
[27:0:0:0] disk DDN S2A 9550 3.10 /dev/sdb
fury:~ # cat /sys/block/sdb/queue/max_hw_sectors_kb
512
fury:~ # cat /sys/class/infiniband_srp/srp-mthca0-1/device/host27/
scsi_host\:host27/cmd_p
er_lun
4
fury:~ #
max_cmd_per_lun was picked up, but max_sect was not.
------------------------------------------------------------------
The original method for adding SRP targets still allows for more
than module parameter to be added. This method works fine.
fury:~/tools/ib # ibsrpdm -d /dev/infiniband/umad0 -c | \
awk '{ORS="";print
$1",max_sect=65535,max_cmd_per_lun=4"}' \
> /sys/class/infiniband_srp/srp-mthca0-1/add_target
fury:~/tools/ib # lsscsi
[0:0:0:0] disk SEAGATE ST373455SS S513 /dev/sda
[31:0:0:0] disk DDN S2A 9550 3.10 /dev/sdb
fury:~/tools/ib # cat /sys/block/sdb/queue/max_hw_sectors_kb
32767
fury:~/tools/ib # cat /sys/class/infiniband_srp/srp-mthca0-1/device/
host31/scsi_host\:hos
t31/cmd_per_lun
4
fury:~/tools/ib #
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