svn commit: r311849 - in head: . sys/amd64/conf sys/arm64/conf sys/conf sys/dev/e1000 sys/i386/conf sys/mips/conf sys/modules sys/modules/em sys/modules/igb sys/powerpc/conf

[Navdeep Parhar]

On Fri, Mar 10, 2017 at 10:41 AM, Ryan Stone <rysto32 at gmail.com> wrote:
> There's also the issue that running "ifconfig igb0 blah" during startup will
> cause if_igb to be automatically loaded by ifconfig.
>
> I guess we could add a dummy if_igb.ko that just has a dependency on
> if_em.ko

I do similar stuff in cxgbe (if_cxl.ko and if_cc.ko exist solely to
drag in if_cxgbe.ko as a dependency).  In hindsight I wish I'd just
added a list of ifnet names -> kld map to ifconfig instead.  It would
have been an ugly hack but much simpler.

Regards,
Navdeep

>
> On Fri, Mar 10, 2017 at 1:13 PM, Warner Losh <imp at bsdimp.com> wrote:
>>
>> On Fri, Mar 10, 2017 at 11:06 AM, Sean Bruno <sbruno at freebsd.org> wrote:
>> >
>> >
>> > On 02/15/17 03:06, Roger Pau Monné wrote:
>> >> On Tue, Jan 10, 2017 at 03:23:22AM +0000, Sean Bruno wrote:
>> >>> Author: sbruno
>> >>> Date: Tue Jan 10 03:23:22 2017
>> >>> New Revision: 311849
>> >>> URL: https://svnweb.freebsd.org/changeset/base/311849
>> >>>
>> >>> Log:
>> >>>   Migrate e1000 to the IFLIB framework:
>> >>>   - em(4) igb(4) and lem(4)
>> >>>   - deprecate the igb device from kernel configurations
>> >>>   - create a symbolic link in /boot/kernel from if_em.ko to if_igb.ko
>> >>
>> >> This linking causes mfsBSD to choke when building an image from HEAD.
>> >> It tries
>> >> to issue the following command:
>> >>
>> >> ${_v}${CP} -rp ${_BOOTDIR}/kernel ${WRKDIR}/disk/boot
>> >>
>> >> Which fails when finding the symbol link. I can send a patch to change
>> >> that to
>> >> -Rp, which would work fine, but wouldn't it be better to either
>> >> completely
>> >> remove if_igb.ko, or simply copy if_em.ko to if_igb.ko?
>> >>
>> >> I'm wondering if for example anyone strips down it's /boot/kernel/
>> >> manually, by
>> >> removing unused modules, and what would happen if if_em.ko is removed
>> >> but not
>> >> if_igb.ko.
>> >>
>> >> Roger.
>> >>
>> >>
>> >
>> > Well, this was my naive attempt to make upgrades for users to be
>> > non-eventful in the event they have "if_igb_load=YES" in their
>> > loader.conf instead of having it built into their kernel.
>> >
>> > If the -Rp works, I'll add that instead.
>>
>> The module name is encoded in the module itself. The boot loader looks
>> it up to see which module to load. Maybe there's a way to fix it so
>> both load from one file?
>>
>> Warner
>>
>