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Re: [PATCH] V2: target: Handle ATA_PASS_THROUGH_16 passthrough

 

 

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mc at linux

May 16, 2012, 8:14 PM

Post #1 of 3 (92 views)
Permalink
Re: [PATCH] V2: target: Handle ATA_PASS_THROUGH_16 passthrough

The cdrecord uses ATA_PASS_THROUGH_16 command while burning CDs
with a SATA CD-ROM. This patch adds support to it so that PSCSI
CD-ROM passthrough works with the cdrecord.

Signed-off-by: Cong Meng <mc [at] linux>
---
drivers/target/target_core_transport.c | 30 ++++++++++++++++++++++++++++++
1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 2d75c29..25e0fc0 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2926,6 +2926,36 @@ static int transport_generic_cmd_sequencer(
size = (cdb[7] << 8) | cdb[8];
cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
break;
+ case ATA_16:
+ // T_LENGTH
+ switch (cdb[2] & 0x3) {
+ case 0x0:
+ sectors = 0;
+ break;
+ case 0x1:
+ sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
+ break;
+ case 0x2:
+ sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
+ break;
+ case 0x3:
+ pr_err("T_LENGTH=0x3 not supported\n");
+ goto out_invalid_cdb_field;
+ break;
+ }
+
+ // BYTE_BLOCK
+ if (cdb[2] & 0x4) {
+ // BLOCK
+ // T_TYPE: 512 or sector
+ size = sectors * ((cdb[2] & 0x10) ?
+ dev->se_sub_dev->se_dev_attrib.block_size : 512);
+ } else {
+ // BYTE
+ size = sectors;
+ }
+ cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
+ break;
default:
pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
" 0x%02x, sending CHECK_CONDITION.\n",
--
1.7.7



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nab at linux-iscsi

May 16, 2012, 11:13 PM

Post #2 of 3 (85 views)
Permalink
Re: [PATCH] V2: target: Handle ATA_PASS_THROUGH_16 passthrough [In reply to]

On Thu, 2012-05-17 at 11:14 +0800, mengcong wrote:
> The cdrecord uses ATA_PASS_THROUGH_16 command while burning CDs
> with a SATA CD-ROM. This patch adds support to it so that PSCSI
> CD-ROM passthrough works with the cdrecord.
>
> Signed-off-by: Cong Meng <mc [at] linux>
> ---
> drivers/target/target_core_transport.c | 30 ++++++++++++++++++++++++++++++
> 1 files changed, 30 insertions(+), 0 deletions(-)
>

Ok, I've added the extra !passthrough check to enforce pSCSI backends
only usage + /* ... */ style comments changes mentioned as feedback you
missed in the last mail. (That's OK this time, but please don't get
into the habit of ignoring patch feedback..)

So committed into lio-core.git, and queuing shortly into
target-pending/for-next to be picked up for tomorrow's linux-next build.

Thanks for your patch MC!

--nab

> diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
> index 2d75c29..25e0fc0 100644
> --- a/drivers/target/target_core_transport.c
> +++ b/drivers/target/target_core_transport.c
> @@ -2926,6 +2926,36 @@ static int transport_generic_cmd_sequencer(
> size = (cdb[7] << 8) | cdb[8];
> cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
> break;
> + case ATA_16:
> + // T_LENGTH
> + switch (cdb[2] & 0x3) {
> + case 0x0:
> + sectors = 0;
> + break;
> + case 0x1:
> + sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
> + break;
> + case 0x2:
> + sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
> + break;
> + case 0x3:
> + pr_err("T_LENGTH=0x3 not supported\n");
> + goto out_invalid_cdb_field;
> + break;
> + }
> +
> + // BYTE_BLOCK
> + if (cdb[2] & 0x4) {
> + // BLOCK
> + // T_TYPE: 512 or sector
> + size = sectors * ((cdb[2] & 0x10) ?
> + dev->se_sub_dev->se_dev_attrib.block_size : 512);
> + } else {
> + // BYTE
> + size = sectors;
> + }
> + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
> + break;
> default:
> pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
> " 0x%02x, sending CHECK_CONDITION.\n",


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mc at linux

May 16, 2012, 11:32 PM

Post #3 of 3 (83 views)
Permalink
Re: [PATCH] V2: target: Handle ATA_PASS_THROUGH_16 passthrough [In reply to]

On Wed, 2012-05-16 at 23:13 -0700, Nicholas A. Bellinger wrote:
> On Thu, 2012-05-17 at 11:14 +0800, mengcong wrote:
> > The cdrecord uses ATA_PASS_THROUGH_16 command while burning CDs
> > with a SATA CD-ROM. This patch adds support to it so that PSCSI
> > CD-ROM passthrough works with the cdrecord.
> >
> > Signed-off-by: Cong Meng <mc [at] linux>
> > ---
> > drivers/target/target_core_transport.c | 30 ++++++++++++++++++++++++++++++
> > 1 files changed, 30 insertions(+), 0 deletions(-)
> >
>
> Ok, I've added the extra !passthrough check to enforce pSCSI backends
> only usage + /* ... */ style comments changes mentioned as feedback you
> missed in the last mail. (That's OK this time, but please don't get
> into the habit of ignoring patch feedback..)

Sorry to the ignoreance of the feedback. My client gets new mail with
problem sometimes.

About the passthrough check, I explains in my last mail.

Thanks.
mc.

>
> So committed into lio-core.git, and queuing shortly into
> target-pending/for-next to be picked up for tomorrow's linux-next build.
>
> Thanks for your patch MC!
>
> --nab
>
> > diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
> > index 2d75c29..25e0fc0 100644
> > --- a/drivers/target/target_core_transport.c
> > +++ b/drivers/target/target_core_transport.c
> > @@ -2926,6 +2926,36 @@ static int transport_generic_cmd_sequencer(
> > size = (cdb[7] << 8) | cdb[8];
> > cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
> > break;
> > + case ATA_16:
> > + // T_LENGTH
> > + switch (cdb[2] & 0x3) {
> > + case 0x0:
> > + sectors = 0;
> > + break;
> > + case 0x1:
> > + sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
> > + break;
> > + case 0x2:
> > + sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
> > + break;
> > + case 0x3:
> > + pr_err("T_LENGTH=0x3 not supported\n");
> > + goto out_invalid_cdb_field;
> > + break;
> > + }
> > +
> > + // BYTE_BLOCK
> > + if (cdb[2] & 0x4) {
> > + // BLOCK
> > + // T_TYPE: 512 or sector
> > + size = sectors * ((cdb[2] & 0x10) ?
> > + dev->se_sub_dev->se_dev_attrib.block_size : 512);
> > + } else {
> > + // BYTE
> > + size = sectors;
> > + }
> > + cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
> > + break;
> > default:
> > pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
> > " 0x%02x, sending CHECK_CONDITION.\n",
>
>


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