RE: FCoE Target naming - help

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Ok Nicholas i solved to problem with versions, i compiled with 3.9.8 and its work, but with patch is still the same:
Hardware ID	LIO-ORG_IBLOCK__________-93b75951-cb09-49fb-8b6c-b3c52d7f-600140593b75951cb0949fb8b6cb3c52-00

S pozdravom / Best regards
 
Tomas Molota
Chief Technology Officer


Parickova 18, 821 08 Bratislava, Slovakia
e-mail: tomas.molota@xxxxxxxxxxxxx
web: www.lightstorm.sk
phone: +421 2 32 400 011
cell phone: +421 903 788 100

-----Original Message-----
From: Nicholas A. Bellinger [mailto:nab@xxxxxxxxxxxxxxx] 
Sent: Thursday, July 25, 2013 1:14 AM
To: Roland Dreier
Cc: Tomas Molota; target-devel
Subject: Re: FCoE Target naming - help

On Wed, 2013-07-24 at 09:36 -0700, Roland Dreier wrote:
> On Wed, Jul 24, 2013 at 8:11 AM, Tomas Molota 
> <tomas.molota@xxxxxxxxxxxxx> wrote:
> > Hello, iam trying to use LIO as FCoE ALUA target and i have problem 
> > with naming which LIO shows to initiators. What i see:
> > Vendor ID : LIO-ORG_
> > Product ID: IBLOCK__________
> > And our system has problem with "_" which are not allowed as name of 
> > storage and its shows me error with this LUN as not supported 
> > device. Is it possible somehow to change this option?
> 
> Do you mean spaces where you write "_"?  What do mean by "show to 
> initiators"?  If you mean the data in the INQUIRY response, then 
> that's what the SCSI spec mandates.  In SPC-4, for example, the vendor 
> field is specified as:
> 
> "The T10 VENDOR IDENTIFICATION field contains eight bytes of 
> left-aligned ASCII data (see 4.3.1) identifying the vendor of the 
> logical unit."
> 
> where 4.3.1 says:
> 
> "ASCII data fields described as being left-aligned shall have any 
> unused bytes at the end of the field (i.e., highest offset) and the 
> unused bytes shall be filled with ASCII space characters (20h)."
> 
> Similarly for the product id fields.
> 
> so according to the SCSI standards, padding those fields with spaces 
> is required.
> 

Mmmm, then this is a bug in spc_emulate_inquiry_std() for VENDOR + MODEL fields.

Thomas, can you please verify with the following patch..?

--nab

diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 4cb667d..a4a29c6 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -97,9 +97,12 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
 
        buf[7] = 0x2; /* CmdQue=1 */
 
-       snprintf(&buf[8], 8, "LIO-ORG");
-       snprintf(&buf[16], 16, "%s", dev->t10_wwn.model);
-       snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision);
+       memcpy(&buf[8], "LIO-ORG ", 8);
+       memset(&buf[16], 0x20, 16);
+       memcpy(&buf[16], dev->t10_wwn.model,
+              min_t(size_t, sizeof(dev->t10_wwn.model), 16));
+       memcpy(&buf[32], dev->t10_wwn.revision,
+              min_t(size_t, sizeof(dev->t10_wwn.revision), 4));
        buf[4] = 31; /* Set additional length to 31 */
 
        return 0;


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