Hi Javen,
I think the root cause for this problem
might be something else which is that even i do a
succesful login to a target and my ndi_devi_online for
the corresponding LUN behind the tgt succeeds ,the
prtconf output looks as below:
'pci<my vendorid>,<subsysid>,instance# 0
disk <some instance number>
sd, instance #1 (no driver attacheD)
st,
--- Javen Wu <[EMAIL PROTECTED]> wrote:
> Hi Som,
>
> I can understand the word "attached" in your email
> in two ways.
> 1. "attached" means the *driver* attachs with the
> device.
> 2. "attached" means the device hook up with the
> iscsi initiator port.
>
> If you mean #1, I think the answer is "No" or
> "impossible" in my mind.
> If you mean #2, I think the answer is "Yes" and
> "possible" but need
> extra work.
>
> I assume you mean #2, let me explain how to reach
> your aim to unload your
> iscsi driver with the target hooked up with your
> initiator port.
>
> From driver side,
> ================
> you need implement tran_bus_unconfig() routine in
> your HBA driver.
> For BUS_UNCONFIG_ALL, you need call
> ndi_devi_offline() manually in
> your tran_bus_unconfig() for all attached target
> devices with
> NDI_DEVI_REMOVE argument.
>
> From user land,
> ==============
> you need a utility to trigger the
> tran_bus_unconfig(), there are
> two options,
> 1. implement cfgadm(1M) plugin for your HBA driver
> so that you
> can borrow "cfgadm -c unconfigure controller" to
> trigger bus
> unconfigure all.
> 2. implement another utility by yourself and call
> scsi standard
> ioctl() with cmd "DEVCTL_BUS_UNCONFIGURE". (please
> refer to
> scsi_hba_ioctl()).
>
> Maybe other guys have better idea, above is just
> what I thought.;)
>
> Hope it helps.
>
> Cheers
> Javen
>
>
> Somnath kotur wrote:
>
> >Hi Javen,
> > Thanks for the info. Well my iSCSI driver
> >requires that i be able to rem_drv my driver with
> >tgts/luns attached ,i.e im wondering if the
> framework
> >internally provides options for the HBA driver to
> >detach its luns, i think i did see a print
> indicating
> >that tran_lun_reset_notify was called when i did
> >attempt to do it..so thats what im intersted to
> know
> >..is there a sequence to the rem_drv if/when
> >LUNs/Targets are attached to the SCSI HBA driver so
> >that i get a chance to remove all the child
> instances
> >of the driver from the device tree?
> >
> >Thanks
> >Som
> >
> >--- Javen Wu <[EMAIL PROTECTED]> wrote:
> >
> >
> >>Hi Som,
> >>
> >>There are two possible scenarios which you can
> >>unload your SCSI HBA
> >>driver without reboot.
> >>1. No any child of the HBA driver instance in the
> >>device tree.
> >>2. If you boot system is not from a SCSI disk and
> >>you can try to unload
> >>sd(7D) driver by "rem_drv sd" without any risk,
> you
> >>can unload your SCSI
> >>HBA driver by rem_drv(1M).
> >>
> >>Thanks
> >>Javen
> >>
> >>
> >>Garrett D'Amore wrote:
> >>
> >>
> >>>Somnath kotur wrote:
> >>>
> >>>
> >>>>Javen ,
> >>>> Is it actually possible to rem_drv my
> >>>>
> >>SCSI
> >>
> >>>>HBA driver ? I read this note below in one of
> the
> >>>>driver docs ,not sure if it is dated
> >>>>
> >>>>
> >>>>
>
>******************************************************
> >
> >>>>Removing the Driver
> >>>>
> >>>>To remove a driver from the system, use
> >>>>
> >>rem_drv(1M),
> >>
> >>>>then delete the driver module and configuration
> >>>>
> >>file
> >>
> >>>>from the module path. The driver cannot be used
> >>>>
> >>again
> >>
> >>>>until it is reinstalled with add_drv(1M).
> >>>>
> >>Removing a
> >>
> >>>>SCSI HBA driver will require a reboot to take
> >>>>
> >>effect.
> >>
> >>>>
>
>******************************************************
> >
> >>>>If its actually possible now, what are the
> entry
> >>>>points that it would hit and i would need to
> take
> >>>>
> >>care
> >>
> >>>>of in my SCSI HBA driver particularly if i have
> >>>>LUNs/targets attached?
> >>>>
> >>>>
> >>>
> >>>rem_drv works, but for SCSI drivers its actions
> >>>
> >>are not likely to take
> >>
> >>>effect until the next boot.
> >>>
> >>>The problem is that if you have any target nodes
> >>>
> >>still attached, then
> >>
> >>>the framework will refuse to detach your node.
> If
> >>>
> >>your bus is
> >>
> >>>hotpluggable, you could try hot-unplugging each
> of
> >>>
> >>the targets (making
> >>
> >>>sure that they are not in use first!), then the
> >>>
> >>framework will see
> >>
> >>>that you have no dependencies in the device tree
> >>>
> >>(providing your
> >>
> >>>driver actually does ndi_devi_offline for devices
> >>>
> >>that were hot removed).
> >>
> >>>In that case, your driver will see its detach(9e)
> >>>
> >>entry point called
> >>
> >>>with cmd == DDI_DETACH. I do not believe that
> >>>
> >>you'll see any other
> >>
> >>>entry points called during the rem_drv.
> >>>
> >>> -- Garrett
> >>>
> >>>
> >>>>Thanks Som
> >>>>
>
=== message truncated ===
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