[pve-devel] [PATCH] add scsi-block detection

Alexandre DERUMIER aderumier at odiso.com
Fri Mar 16 15:45:22 CET 2012


I didn't have checked,

but i found this in

scsi-disk.c

static int scsi_block_initfn(SCSIDevice *dev)
{
    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
    int sg_version;
    int rc;

    if (!s->qdev.conf.bs) {
        error_report("scsi-block: drive property not set");
        return -1;
    }

    /* check we are using a driver managing SG_IO (version 3 and after) */
    if (bdrv_ioctl(s->qdev.conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0 ||
        sg_version < 30000) {
        error_report("scsi-block: scsi generic interface too old");
        return -1;
    }

    /* get device type from INQUIRY data */
    rc = get_device_type(s);
    if (rc < 0) {
        error_report("scsi-block: INQUIRY failed");
        return -1;
    }

    /* Make a guess for the block size, we'll fix it when the guest sends.
     * READ CAPACITY.  If they don't, they likely would assume these sizes
     * anyway. (TODO: check in /sys).
     */
    if (s->qdev.type == TYPE_ROM || s->qdev.type == TYPE_WORM) {
        s->qdev.blocksize = 2048;
    } else {
        s->qdev.blocksize = 512;
    }
    return scsi_initfn(&s->qdev);
}





maybe

 bdrv_ioctl(s->qdev.conf.bs, SG_GET_VERSION_NUM, &sg_version) 
  do the job ?

----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Vendredi 16 Mars 2012 15:20:41 
Objet: RE: [pve-devel] [PATCH] add scsi-block detection 

Have you checked what kind of test the scsi-block driver usese itself? Maybe a simple ioctl call? 


> -----Original Message----- 
> From: Alexandre DERUMIER [mailto:aderumier at odiso.com] 
> Sent: Freitag, 16. März 2012 12:12 
> To: Dietmar Maurer 
> Cc: pve-devel at pve.proxmox.com 
> Subject: Re: [pve-devel] [PATCH] add scsi-block detection 
> 
> yes,it's work, i tested it with my multipathed iscsi luns. 
> 
> ----- Mail original ----- 
> 
> De: "Dietmar Maurer" <dietmar at proxmox.com> 
> À: "Derumier Alexandre" <aderumier at odiso.com>, pve- 
> devel at pve.proxmox.com 
> Envoyé: Vendredi 16 Mars 2012 11:18:22 
> Objet: RE: [pve-devel] [PATCH] add scsi-block detection 
> 
> And such multipath device works with the scsi-block driver (you tested that)? 
> 
> - Dietmar 
> 
> > -----Original Message----- 
> > From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel- 
> > bounces at pve.proxmox.com] On Behalf Of Derumier Alexandre 
> > Sent: Freitag, 16. März 2012 08:57 
> > To: pve-devel at pve.proxmox.com 
> > Subject: [pve-devel] [PATCH] add scsi-block detection 
> > 
> > 
> > Signed-off-by: Derumier Alexandre <aderumier at odiso.com> 
> > --- 
> > PVE/QemuServer.pm | 48 
> > +++++++++++++++++++++++++++++++++++++++++++++--- 
> > 1 files changed, 45 insertions(+), 3 deletions(-) 
> > 
> > diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm index 
> > 3991606..13a7852 100644 
> > --- a/PVE/QemuServer.pm 
> > +++ b/PVE/QemuServer.pm 
> > @@ -25,6 +25,7 @@ use PVE::Cluster qw(cfs_register_file cfs_read_file 
> > cfs_write_file cfs_lock_file use PVE::INotify; use PVE::ProcFSTools; 
> > use Time::HiRes qw(gettimeofday); 
> > +use Unix::Mknod qw(:all); 
> > 
> > my $cpuinfo = PVE::ProcFSTools::read_cpuinfo(); 
> > 
> > @@ -904,9 +905,8 @@ sub print_drivedevice_full { } else { $path = 
> > PVE::Storage::path($storecfg, $drive->{file}); } 
> > - if ($path =~ m|^/dev/| ) { 
> > - $devicetype = 'block'; 
> > - } 
> > + 
> > + $devicetype = 'block' if path_is_scsi($path); 
> > } 
> > 
> > $device = "scsi-$devicetype,bus=lsi$controller.0,scsi- 
> > id=$unit,drive=drive-$drive->{interface}$drive->{index},id=$drive- 
> > >{interface}$drive->{index}"; 
> > @@ -2904,6 +2904,48 @@ sub vm_stopall { print $msg; } 
> > 
> > +sub path_is_scsi { 
> > + my ($path) = @_; 
> > + 
> > + return if ($path !~ m|^/dev/|); 
> > + 
> > + my $bdev = undef; 
> > + #if path is /dev/xxx 
> > + if($path =~ m|^/dev/[^/]+/?$|) { 
> > + $bdev = $path; 
> > + } 
> > + #if path is /dev/disk/ 
> > + elsif ($path =~ m|^/dev/disk/|) { 
> > + $bdev = readlink($path); 
> > + #if multipath, we need to find real device if($bdev =~ 
> > + m/(dm-(\d+))$/) { my $dir="/sys/block/$1/slaves/"; my $dh = 
> > + IO::Dir->new ($dir); if (defined $dh) { while (defined(my $tmp = 
> > + $dh->read)) { if ($tmp =~ m/([0-9A-Za-z])$/) { $bdev="/dev/$tmp"; } 
> > + } } } elsif ($bdev =~ m/(\w+)/) { $bdev="/dev/$1"; } } 
> > + 
> > + return if !$bdev; 
> > + 
> > + my $st=stat($bdev); 
> > + my $major=Unix::Mknod::major($st->rdev); 
> > + 
> > + if ($major =~ m/^(\d+)$/) { 
> > + $major = $1; 
> > + my @scsimajors = 
> > (8,65,66,67,68,69,70,71,128,129,130,131,132,133,134,135); 
> > + return 1 if (grep /^$major$/, @scsimajors) } } 
> > + 
> > # pci helpers 
> > 
> > sub file_write { 
> > -- 
> > 1.7.2.5 
> > 
> > _______________________________________________ 
> > pve-devel mailing list 
> > pve-devel at pve.proxmox.com 
> > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel 
> 
> 
> 
> 
> 
> -- 
> 
> -- 
> 
> 
> 
> 
> Alexandre D erumier 
> Ingénieur Système 
> Fixe : 03 20 68 88 90 
> Fax : 03 20 68 90 81 
> 45 Bvd du Général Leclerc 59100 Roubaix - France 
> 12 rue Marivaux 75002 Paris - France 
> 




-- 

-- 




	Alexandre D erumier 
Ingénieur Système 
Fixe : 03 20 68 88 90 
Fax : 03 20 68 90 81 
45 Bvd du Général Leclerc 59100 Roubaix - France 
12 rue Marivaux 75002 Paris - France 
	


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