On Mar 1, 10:59pm, "Nicholas A. Bellinger" wrote: } Subject: Re: [Lsf-pc] [LSF/MM TOPIC] Unifying the LIO and SCST target driv Hi, I hope the week is progressing well for everyone. > On Sat, 2015-02-28 at 12:59 +0100, Bart Van Assche wrote: > > On 02/27/15 22:58, Nicholas A. Bellinger wrote: > > > Looking at how your attempting to drive creation + removal of struct > > > config_group from within kernel code here: > > > > > > target: Add target port registration API > > > https://github.com/bvanassche/linux/commit/dbb8bf32db3428ede6ecc688ede1e5e01fc59d88 > > > > > > is the exactly the wrong approach to take. > > > > > > The creation and deletion of struct config_group must be driven by > > > user-space, and by user-space only. No exceptions will be made. > > > > There exists an approach that preserves the ABI of both SCST and LIO, > > namely: > > * Add empty transport_register_wwn() and transport_unregister_wwn() > > functions in the LIO core. > > * Add calls to these functions at the appropriate place in the FC > > and SRP target drivers. > > * In the SCST implementation of the unified target driver API, route > > calls to transport_register_wwn() and transport_unregister_wwn() to > > scst_register_target() and scst_unregister_target() respectively. > > > NAK. > > I'll not consider any hooks in upstream target code, and certainly > not driver hooks for a control-plane approach unanimously rejected > by both configfs and sysfs maintainers in 2008 and 2010. > > The whole point of target_core_fabric_configfs.c is to transparently > reference count fabric driver data structures populated underneath > /sys/kernel/config/target/$FABRIC/, who's design also has the added > bonus of providing module reference counting to drivers 'for free'. > > So until you're prepared to evolve on this issue and stop pretending > as if the future didn't already happen, this type of discussion at > LSF is a waste of time. So, in this spirit of collaborative and collegial exchange, which I see that Christoph has called for, I have a question for those who posess familiarity with the LIO control plane design. In this parousia of total user-space configuration, not necessarily a bad thing, what would be the target fabric presentation of a storage target server which has one Qlogic 8242 card and one Qlogic 8362 card in it? > --nab Best wishes for a pleasant remainder of the week to everyone. Greg }-- End of excerpt from "Nicholas A. Bellinger" As always, Dr. G.W. Wettstein, Ph.D. Enjellic Systems Development, LLC. 4206 N. 19th Ave. Specializing in information infra-structure Fargo, ND 58102 development. PH: 701-281-1686 FAX: 701-281-3949 EMAIL: greg@xxxxxxxxxxxx ------------------------------------------------------------------------------ "Man, despite his artistic pretensions, his sophistication and many accomplishments, owes the fact of his existence to a six-inch layer of topsoil and the fact that it rains." -- Anonymous writer on perspective. GAUSSIAN quote. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
