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Generate new UUID if system UUID is known bad or malformed and add a two

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seconds sleep if we found the system UUID be invalid.

Obtained from:	FreeNAS
MFC after:	2 weeks
This commit is contained in:
Xin LI 2015-04-27 20:21:56 +00:00
parent 26e4122a80
commit 3f6cf39fb2
1 changed files with 59 additions and 11 deletions
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70
etc/rc.d/hostid
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@ -1,6 +1,7 @@
#!/bin/sh
#
# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
# Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
@ -55,23 +56,66 @@ hostid_set()
${SYSCTL} kern.hostid=${id} >/dev/null
}
valid_hostid()
{
uuid=$1
x="[0-9a-f]"
y=$x$x$x$x
# Check against a blacklist before
# accepting the UUID.
case "${uuid}" in
00000000-0000-0000-0000-000000000000)
;;
00020003-0004-0005-0006-000700080009)
;;
03000200-0400-0500-0006-000700080009)
;;
07090201-0103-0301-0807-060504030201)
;;
11111111-1111-1111-1111-111111111111)
;;
11111111-2222-3333-4444-555555555555)
;;
4c4c4544-0000-2010-8020-80c04f202020)
;;
58585858-5858-5858-5858-585858585858)
;;
890e2d14-cacd-45d1-ae66-bc80e8bfeb0f)
;;
8e275844-178f-44a8-aceb-a7d7e5178c63)
;;
dc698397-fa54-4cf2-82c8-b1b5307a6a7f)
;;
fefefefe-fefe-fefe-fefe-fefefefefefe)
;;
*-ffff-ffff-ffff-ffffffffffff)
;;
$y$y-$y-$y-$y-$y$y$y)
return 0
;;
esac
return 1
}
hostid_hardware()
{
uuid=`kenv -q smbios.system.uuid`
x="[0-9a-f]"
y=$x$x$x$x
case "${uuid}" in
$y$y-$y-$y-$y-$y$y$y)
if valid_hostid $uuid; then
echo "${uuid}"
;;
esac
fi
}
hostid_generate()
{
# First look for UUID in hardware.
uuid=`hostid_hardware`
if [ -z ${uuid} ]; then
if [ -z "${uuid}" ]; then
warn "hostid: unable to figure out a UUID from DMI data, generating a new one"
sleep 2
# If not found, fall back to software-generated UUID.
uuid=`uuidgen`
fi
@ -92,11 +136,15 @@ hostid_start()
{
# If ${hostid_file} already exists, we take UUID from there.
if [ -r ${hostid_file} ]; then
hostid_set `cat ${hostid_file}`
else
# No hostid file, generate UUID.
hostid_generate
read saved_hostid < ${hostid_file}
if valid_hostid ${saved_hostid}; then
hostid_set `cat ${hostid_file}`
exit 0
fi
fi
# No hostid file, generate UUID.
hostid_generate
}
load_rc_config $name