[pve-devel] virtual scsi disk passed with scsi-block with lvm host storage (wrong)

[Alexandre DERUMIER]

I don't known how to do that in proxmox code (we use ioctl directly)

but


bad
---
# sg_inq /dev/pve/vm-115-disk-2
standard INQUIRY:
  PQual=0  Device_type=0  RMB=0  LU_CONG=0  version=0x05  [SPC-3]
  [AERC=0]  [TrmTsk=0]  NormACA=0  HiSUP=0  Resp_data_format=2
  SCCS=0  ACC=0  TPGS=0  3PC=0  Protect=0  [BQue=0]
  EncServ=0  MultiP=0  [MChngr=0]  [ACKREQQ=0]  Addr16=0
  [RelAdr=0]  WBus16=0  Sync=0  [Linked=0]  [TranDis=0]  CmdQue=1
  [SPI: Clocking=0x0  QAS=0  IUS=0]
    length=96 (0x60)   Peripheral device type: disk
 Vendor identification: DELL    
 Product identification: PERC 5/i        
 Product revision level: 1.03
 Unit serial number: 005108686cb9dda210002770c530c201


ok
--
#capsh --drop=cap_sys_rawio -- -c 'sg_inq /dev/pve/vm-115-disk-2'
Both SCSI INQUIRY and fetching ATA information failed on /dev/pve/vm-115-disk-2

ok
--
# capsh --drop=cap_sys_rawio -- -c 'sg_inq /dev/sda'
standard INQUIRY:
  PQual=0  Device_type=0  RMB=0  LU_CONG=0  version=0x05  [SPC-3]
  [AERC=0]  [TrmTsk=0]  NormACA=0  HiSUP=0  Resp_data_format=2
  SCCS=0  ACC=0  TPGS=0  3PC=0  Protect=0  [BQue=0]
  EncServ=0  MultiP=0  [MChngr=0]  [ACKREQQ=0]  Addr16=0
  [RelAdr=0]  WBus16=0  Sync=0  [Linked=0]  [TranDis=0]  CmdQue=1
  [SPI: Clocking=0x0  QAS=0  IUS=0]
    length=96 (0x60)   Peripheral device type: disk
 Vendor identification: DELL    
 Product identification: PERC 5/i        
 Product revision level: 1.03
 Unit serial number: 005108686cb9dda210002770c530c201

----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Mardi 23 Février 2016 17:47:58
Objet: [pve-devel] virtual scsi disk passed with scsi-block with lvm host storage (wrong)

Hi, users have reported bugs with virtio-scsi + lvm host storage 

https://forum.proxmox.com/threads/problem-with-iscsi-virtio-ovmf.26192/#post-131416 
https://forum.proxmox.com/threads/lvm-and-virtio-scsi-detects-volume-as-complete-drive.24190/ 

currently we use scsi-block for lvm disk, insteda scsi-generic 

I think this redhat bugzilla is related 

https://bugzilla.redhat.com/show_bug.cgi?id=1179577 


We need to fix something here in QemuServer.pm, 
I think the ioctl don't detect correctly lvm, so maybe a workaround is needed (bypass if $scfg->{type} eq 'lvm' ?) 


if (my $info = path_is_scsi($path)) { 
if ($info->{type} == 0) { 
$devicetype = 'block'; 
} elsif ($info->{type} == 1) { # tape 
$devicetype = 'generic'; 
} 
} 

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