Date: Wed, 20 Feb 2008 14:09:35 -0500 From: "Brian A. Seklecki" <lavalamp@spiritual-machines.org> To: freebsd-questions@freebsd.org Subject: _devname in src/usr.sbin/sysinstall/devices.c Message-ID: <1203534575.10391.60.camel@soundwave.ws.pitbpa0.priv.collaborativefusion.com>
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All:
Does anyone know the relationship between this structure (major, minor,
delta, etc.) and real device IDs? Obviously devd(8) isn't running in
the MFS install kernel, but I assume the magic still happens.
Also, I don't see that major/minors indexed here actually matching a
booted SMP kernel?
$ ls /dev/mfi*
crw-r----- 1 root operator 0, 32 Dec 14 13:16 /dev/mfi0
crw-r----- 1 root operator 0, 85 Dec 14 13:16 /dev/mfid0
crw-r----- 1 root operator 0, 87 Dec 14 13:16 /dev/mfid0s1
crw-r----- 1 root operator 0, 95 Dec 14 13:16 /dev/mfid0s1a
[...snip...]
crw-r----- 1 root operator 0, 101 Dec 14 13:16 /dev/mfid0s1g
crw-r----- 1 root operator 0, 86 Dec 14 13:16 /dev/mfid1
But devices.c lists the major as:
{ DEVICE_TYPE_DISK, "mfid%d", "LSI MegaRAID SAS", 254, 65538, 8, 4 },
I'm pretty sure neither 254 and/or 32/85 are match the major on the
boot/install MFS kernel. They don't seem to be related, yet when i
screw with struct{} _devname, I break device detection, so it is still
used in some way.
I'm fuzzy on how these M/M are used in FreeBSD -- I missed the whole
auto-magic assignment period during the 5x days.
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