Hello all,
We have a host that has no /dev/hd{a,b,c,d}, only serial ATA (/dev/hde
through hdi). It runs devfs, so it has no entries for devices that do
not seem to be present. /dev/hda1 does not exist.
When trying to create a new xm domain, it will not be able to stat
/dev/hda1 when it tries to look up the device number(s) of it. When
/dev/hda1 exists it does work. Is this behavior appropriate? Are
domain0's major/minor number better to use than the known standard
entries? If not, I suggest modifying it. If it is, the patch could still
be aplied for systems that lack the /dev/ entries as fallback information.
It can probably rely on the following information, because it's common
to most/all POSIX systems:
hda: 3,0
hda1-20: 3,1-20
hdb: 3,64
hdb1-20: 3,65-84
hdc: 22,0
hdc1-20: 22,1-20
hdd: 22,64
hdd1-20: 22,65-84
If you don't want to assume such a numbering scheme it would be nicest
to have it recognise devfs, making it devfs compliant, though I'd
understand if you have more important things to do!
I'm no python expert, but here's a pseudocode patch:
INPUT: $hddev (examples: hda1, hdd8)
hd_offsets = [ a = 0, b = 64, c = 0, d = 64 ]
$1, $2 = regex("hd([a-d])([0-9]{1,2})",$hddev)
hd_offset = $hd_offsets[$1]
hd_minor = $2 + hd_offset
hd_majors = [ a = 3, b = 3, c = 22, d = 22 ]
hd_major = hd_majors[$1]
OUTPUT: hd_major, hd_minor
I believe this should be written for
xen-2.0.bk/dist/install/lib/python/xen/xend/server/blkif.py, somewhere
below line 54.
I hope this stupid example speeds up the process of resolving this
issue. In the mean time I'll work around it by providing a fake /dev.
My assumptions are based on this output:
host home # tail -f /var/log/xend.log
host home # xm create pijan.xenconf -c
Using config file "pijan.xenconf".
Error: Error creating domain: vbd: Device not found: hda1
host home # [2004-11-26 23:28:32 xend] DEBUG (XendDomainInfo:720)
init_domain> Created domain=24 name=bla memory=512
[2004-11-26 23:28:32 xend] INFO (console:92) Created console id=13
domain=24 port=9624
[2004-11-26 23:28:32 xend] DEBUG (XendDomainInfo:1102) Creating vbd
dom=24 uname=file:/home/VMs/bla//root_fs
[2004-11-26 23:28:32 xend] DEBUG (blkif:63) exception looking up device
number for hda1: [Errno 2] No such file or directory: '/dev/hda1'
[2004-11-26 23:28:32 xend] DEBUG (XendDomainInfo:674) Destroying vbds
for domain 24
[2004-11-26 23:28:32 xend] DEBUG (blkif:541) Destroying blkif domain=24
[2004-11-26 23:28:32 xend] DEBUG (XendDomainInfo:634) Closing console,
domain 24
[2004-11-26 23:28:32 xend] DEBUG (XendDomainInfo:622) Closing channel to
domain 24
[2004-11-26 23:28:32 xend] ERROR (SrvBase:162) op=create: Error creating
domain: vbd: Device not found: hda1
As comparison, a working device number (when issuing it with "hdi1"):
[2004-11-26 23:45:40 xend] INFO (console:92) Created console id=13
domain=25 port=9625
[2004-11-26 23:45:41 xend] DEBUG (XendDomainInfo:1102) Creating vbd
dom=25 uname=file:/home/VMs/bla/root_fs
[2004-11-26 23:45:41 xend] DEBUG (blkif:146) Connecting blkif
<BlkifBackendInterface 25 0>
[2004-11-26 23:45:41 xend] DEBUG (XendDomainInfo:1102) Creating vbd
dom=25 uname=file:/home/VMs/bla/swap_fs
[2004-11-26 23:45:41 xend] DEBUG (blkif:63) exception looking up device
number for hda2: [Errno 2] No such file or directory: '/dev/hda2'
[2004-11-26 23:45:41 xend] DEBUG (XendDomainInfo:674) Destroying vbds
for domain 25
[2004-11-26 23:45:41 xend] DEBUG (blkif:541) Destroying blkif domain=25
[2004-11-26 23:45:41 xend] DEBUG (blkif:397) Destroying vbd domain=25 idx=0
[2004-11-26 23:45:41 xend] DEBUG (XendDomainInfo:634) Closing console,
domain 25
[2004-11-26 23:45:41 xend] DEBUG (XendDomainInfo:622) Closing channel to
domain 25
[2004-11-26 23:45:41 xend] ERROR (SrvBase:162) op=create: Error creating
domain: vbd: Device not found: hda2
I hope I'm helpful!
--
Kind regards,
Erik de Bruijn
BudgetDedicated
www.BudgetDedicated.com | Tel. +31 492 430559 | Fax. +31 492 663870 | Mob. +31
6 21856715 | Adres: Haagwinde 16 | Zipcode NL-5731 WD Mierlo
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