From cth@sac.sfbay.sun.com Tue May 20 18:33:54 2008 Received: from sunmail4.singapore.sun.com (sunmail4.Singapore.Sun.COM [129.158.71.19]) by sac.sfbay.sun.com (8.13.8+Sun/8.13.8) with ESMTP id m4L1XrhR018864 for ; Tue, 20 May 2008 18:33:53 -0700 (PDT) Received: from nwk-avmta-1.SFBay.Sun.COM (nwk-avmta-1.SFBay.Sun.COM [129.146.11.74]) by sunmail4.singapore.sun.com (8.13.4+Sun/8.13.3/ENSMAIL,v2.2) with ESMTP id m4L1Xptp016171; Wed, 21 May 2008 09:33:52 +0800 (SGT) Received: from pmxchannel-daemon.nwk-avmta-1.sfbay.Sun.COM by nwk-avmta-1.sfbay.Sun.COM (Sun Java System Messaging Server 6.2-3.04 (built Jul 15 2005)) id <0K170080930C7H00@nwk-avmta-1.sfbay.Sun.COM>; Tue, 20 May 2008 18:33:48 -0700 (PDT) Received: from dm-sfbay-01.sfbay.sun.com ([129.145.155.118]) by nwk-avmta-1.sfbay.Sun.COM (Sun Java System Messaging Server 6.2-3.04 (built Jul 15 2005)) with ESMTP id <0K1700K6I30BGUC0@nwk-avmta-1.sfbay.Sun.COM>; Tue, 20 May 2008 18:33:47 -0700 (PDT) Received: from sac.sfbay.sun.com (new-sac.SFBay.Sun.COM [129.146.175.65]) by dm-sfbay-01.sfbay.sun.com (8.13.8+Sun/8.13.8/ENSMAIL,v2.2) with ESMTP id m4L1Xl4I018381; Tue, 20 May 2008 18:33:47 -0700 (PDT) Received: from sac.sfbay.sun.com (localhost [127.0.0.1]) by sac.sfbay.sun.com (8.13.8+Sun/8.13.8) with ESMTP id m4L1Xkae018833; Tue, 20 May 2008 18:33:46 -0700 (PDT) Received: (from cth@localhost) by sac.sfbay.sun.com (8.13.8+Sun/8.13.8/Submit) id m4L1Xk1m018829; Tue, 20 May 2008 18:33:46 -0700 (PDT) Date: Tue, 20 May 2008 18:33:46 -0700 (PDT) From: Christopher Horne Subject: scsi-self-identifying [PSARC/2008/337 FastTrack timeout 05/28/2008] To: PSARC-ext@sun.com Message-id: <200805210133.m4L1Xk1m018829@sac.sfbay.sun.com> Content-transfer-encoding: 7BIT X-PMX-Version: 5.4.1.325704 Status: RO Content-Length: 4394 I am sponsoring the following fasttrack for Javen Wu with a timeout of 05/28/2008. It introduces a new 'add_drv -c' driver class for scsi(4) SCSA HBA drivers that support self-identifying children. The proposed release binding is micro/patch. Additional referenced material is in the case directory. -Chris Template Version: @(#)sac_nextcase 1.66 04/17/08 SMI This information is Copyright 2008 Sun Microsystems 1. Introduction 1.1. Project/Component Working Name: scsi-self-identifying 1.2. Name of Document Author/Supplier: Author: Javen Wu 1.3 Date of This Document: 20 May, 2008 4. Technical Description 4.1 Summary To perform devid discovery from scratch, the IO framework needs to be able to identify 'sticks' of the device tree where the configuration of the stick might result in the registration of devids. The 'ddi-devid-registrant' [1] property names the leaf drivers that might generate devids, and stub nodes defined in the leaf driver.conf file identify HBAs that might have children that bind to the driver. These two things together allow the IO framework to identify 'all sticks' to configure when trying to discover the paths to a device with a particular devid. Accurate 'all sticks' information is important when more efficient devid-path discovery methods, like [2], fail. Recently, there are more and more self-identifying SCSI HBA drivers, as defined by [3], which are not of class=scsi. Currently, we have to add parent="" to the leaf driver.conf files (sd/ssd) for every self-identifying HBA driver. This parent="" technique causes cross-driver pollution in the .conf files of leaf drivers (causing issues with things like driver class-action scripts). Also, people are forgetting that they need to do this to ensure proper devid discovery. So far, we have a lot of HBA drivers that add specific 'stub' configuration nodes (with parent="") to the leaf driver.conf files. The examples are the following 'stub' nodes in sd.conf file and ssd.conf file: sd.conf:(i386) name="sd" parent="nv_sata"; name="sd" parent="ahci"; name="sd" parent="si3124"; name="sd" parent="marvell88sx"; ssd.conf:(sparc) name="ssd" parent="sf" target=0; name="ssd" parent="fp" target=0; name="ssd" parent="scsi_vhci" target=0; Currently, more pollution occurs each time we add a self-identifying HBA driver to Solaris. As a solution, this case proposes the introduction of a new class (ala /etc/driver_classes) called 'scsi-self-identifying'. With this change, all SCSA self-identifying HBA drivers will be part of the new class, with a single generic "parent=scsi-self-identifying" stub node in the leaf .conf files. 4.2 Proposal The proposed new driver class 'scsi-self-identifying' can be resisted by self-identifying SCSI HBA drivers during add_drv(1M) or BFU/upgrade. At the same time, a generic 'stub' node will be added into sd.conf/ssd.conf instead of the 'stub' nodes only with parent property like below: sd.conf (both x86 and sparc) name="sd" class="scsi-self-identifying"; ssd.conf name="ssd" class="scsi-self-identifying"; 4.3 Interface Summary Interface Level Comments ------------------------------------------------------------------------- scsi-self-identifying Committed driver class to indicate a SCSA compliant nexus driver which is not of class=scsi and is able to dynamically create self-identifying scsi(4) device children. 4.4 References [1] PSARC/2007/477 Drivers Registering Devids [2] PSARC/2004/064 Devid Cache [3] PSARC/2004/116 SCSI target compatible property [4] Manpage of scsi(4) 6. Resources and Schedule 6.4. Steering Committee requested information 6.4.1. Consolidation C-team Name: ON 6.5. ARC review type: FastTrack 6.6. ARC Exposure: open From Chris.Horne@sun.com Wed May 28 10:35:34 2008 Received: from sunmail5.uk.sun.com (sunmail5.UK.Sun.COM [129.156.85.165]) by sac.sfbay.sun.com (8.13.8+Sun/8.13.8) with ESMTP id m4SHZXds011746 for ; Wed, 28 May 2008 10:35:34 -0700 (PDT) Received: from nwk-avmta-2.sfbay.sun.com (nwk-avmta-2.SFBay.Sun.COM [129.145.155.6]) by sunmail5.uk.sun.com (8.13.8+Sun/8.13.8/ENSMAIL,v2.2) with ESMTP id m4SHZTZv005564 for <@sunmail2sca.sfbay.sun.com:PSARC-ext@sun.com>; Wed, 28 May 2008 18:35:32 +0100 (BST) Received: from pmxchannel-daemon.nwk-avmta-2.sfbay.sun.com by nwk-avmta-2.sfbay.sun.com (Sun Java System Messaging Server 6.2-3.04 (built Jul 15 2005)) id <0K1L00809A78L000@nwk-avmta-2.sfbay.sun.com> for PSARC-ext@sun.com (ORCPT PSARC-ext@Sun.Com); Wed, 28 May 2008 10:35:32 -0700 (PDT) Received: from brmea-mail-2.sun.com ([192.18.98.43]) by nwk-avmta-2.sfbay.sun.com (Sun Java System Messaging Server 6.2-3.04 (built Jul 15 2005)) with ESMTP id <0K1L005XOA76QU40@nwk-avmta-2.sfbay.sun.com> for PSARC-ext@sun.com (ORCPT PSARC-ext@Sun.Com); Wed, 28 May 2008 10:35:30 -0700 (PDT) Received: from fe-amer-09.sun.com ([192.18.109.79]) by brmea-mail-2.sun.com (8.13.6+Sun/8.12.9) with ESMTP id m4SHZUMo024132 for ; Wed, 28 May 2008 17:35:30 +0000 (GMT) Received: from conversion-daemon.mail-amer.sun.com by mail-amer.sun.com (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) id <0K1L00E017LS4O00@mail-amer.sun.com> (original mail from Chris.Horne@Sun.COM) for PSARC-ext@Sun.Com (ORCPT PSARC-ext@Sun.Com); Wed, 28 May 2008 11:35:30 -0600 (MDT) Received: from [172.20.25.50] by mail-amer.sun.com (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) with ESMTPSA id <0K1L005GVA6N3TG0@mail-amer.sun.com> for PSARC-ext@Sun.Com (ORCPT PSARC-ext@Sun.Com); Wed, 28 May 2008 11:35:11 -0600 (MDT) Date: Wed, 28 May 2008 11:30:25 -0600 From: Chris Horne Subject: Re: scsi-self-identifying [PSARC/2008/337 FastTrack timeout 05/28/2008] In-reply-to: <200805210133.m4L1Xk1m018829@sac.sfbay.sun.com> Sender: Chris.Horne@sun.com To: PSARC-ext@sun.com Cc: Javen Wu Message-id: <483D96B1.7060009@sun.com> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7BIT X-PMX-Version: 5.4.1.325704 References: <200805210133.m4L1Xk1m018829@sac.sfbay.sun.com> User-Agent: Thunderbird 1.5.0.8 (X11/20061204) Status: RO Content-Length: 57 This case was approved at todays PSARC meeting. -Chris