Date: Fri, 31 Aug 2012 00:31:06 +0000 From: John <jwd@FreeBSD.org> To: FreeBSD SCSI <freebsd-scsi@freebsd.org> Subject: camcontrol devlist device name ordering Message-ID: <20120831003106.GA70561@FreeBSD.org>
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Hi Folks, I've been working on a small utility to map devices and enclosures and generate a small report. Nothing special really. However, I've run into a small parsing issue I thought I'd ask about here. When running "camcontrol devlist", the device names are not always printed out the same. For instance: <HP EG0600FBLSH HPD2> at scbus7 target 165 lun 0 (pass24,da21) <HP EG0600FBLSH HPD2> at scbus7 target 166 lun 0 (pass25,da22) <HP EG0600FBLSH HPD2> at scbus7 target 167 lun 0 (pass26,da23) <HP EG0600FBLSH HPD2> at scbus7 target 168 lun 0 (pass27,da24) <HP D2700 SAS AJ941A 0131> at scbus7 target 169 lun 0 (ses0,pass28) <--- <HP EG0600FBLSH HPD2> at scbus7 target 170 lun 0 (pass29,da25) <HP EG0600FBLSH HPD2> at scbus7 target 171 lun 0 (pass30,da26) <HP EG0600FBLSH HPD2> at scbus7 target 172 lun 0 (pass31,da27) In the last column, the disk devices are pass device / disk device. For the enclosure, it's enclosure device / pass device. First I looked at camcontrol, but it is simply looping over the list as presented. It is not responsible for the ordering. I then started poking around in sys/cam/scsi/scsi_ses.c and I can see where the device is allocated, but I'm not sure how the insertion ordering is controlled for the pass & ses devices. Does someone with a bit more knowledge of this area have an idea where I should look? Running 9.1-PRERELEASE Fri Aug 24. 2012 Thanks, John
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