top of ZVOLs. The problem is that rc.d/fsck runs before rc.d/zfs. The
latter makes ZVOLs to appear in /dev/. In such case rc.d/fsck cannot
find devfs entry and aborts. We cannot simply move rc.d/zfs before
rc.d/fsck, because we first want kern.hostid to be configured (by
rc.d/hostid). If we won't wait (hostid will be 0) we can reuse disks
which are in use by different systems (eg. in SAN/NAS environment).
We also cannot move rc.d/hostid before rc.d/fsck, because rc.d/hostid on
first system start stores generated kern.hostuuid in /etc/hostid file,
so it needs root file system to be mounted read-write.
The fix is to split rc.d/hostid so that rc.d/hostid (which will now run
before rc.d/fsck) only generates hostid and sets up sysctls, but doesn't
touch root file system and rc.d/hostid_save (which is run after
rc.d/root) and only creates /etc/hostid file.
With that in place, we can move ZVOL initialization to dedicated
rc.d/zvol script which runs before rc.d/fsck.
PR: conf/120194
Reported by: James Snow <snow@teardrop.org>
Reviewed by: brooks
Approved by: re (kib)
MFC after: 2 weeks
/etc/rc.d/hostid now that we switched the origin of the UUID (variable
smbios.system.uuid as provided by the i386 BIOS code) to already provide
a standard conforming lower-case UUID text representation.
usage to an equivalent csh(1) usage as tr(1) stays in /usr/bin and
/etc/rc.d/hostid has just the root filesystem (and this way mainly the
tools in /bin) available.
I've chosen csh(1) here as the string manipulation tools available in
/bin is extremely limited and the (only) alternative ed(1) usage would
have been a lot more complicated or even might require a temporary file.
and ISO/IEC-9834-8:2005 is with LOWER-CASE hexadecimal characters only,
so translate the (usually upper-case and this way not conforming)
representation of the BIOS UUID when reading it. Also be more strict
about the valid characters in the textual representation by checking for
just the hexadecimal characters.
software-generated UUID. Store the result in /etc/hostid and use it in
the future. Perform simple UUID format check, as there is a lot of
hardware with broken UUIDs. The check should be improved to also eliminate
fake UUIDs like 00000000-0000-0000-0000-000000000000.
Requested by: many
UUID and stores it in /etc/hostid ($hostid_file) as well as sets kern.hostuuid
and kern.hostid sysctls on every boot.
Hostid can be reset using '/etc/rc.d/hostid reset' command.
Hostid generation and setting can be turned off by setting variable
hostid_enable to "NO" in /etc/rc.conf.
Reviewed by: mlaier, rink, brooks, rwatson
