Re: [PATCH v2 12/12] IB/isert: Support T10-PI protected transactions

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, 2014-03-13 at 20:57 +0200, Sagi Grimberg wrote:
> On 3/13/2014 8:15 PM, Nicholas A. Bellinger wrote:
> > Hey Sagi,
> >
> > On Wed, 2014-02-19 at 17:50 +0200, Sagi Grimberg wrote:
> >> In case the Target core passed transport T10 protection
> >> operation:
> >>
> >> 1. Register data buffer (data memory region)
> >> 2. Register protection buffer if exsists (prot memory region)
> >> 3. Register signature region (signature memory region)
> >>     - use work request IB_WR_REG_SIG_MR
> >> 4. Execute RDMA
> >> 5. Upon RDMA completion check the signature status
> >>     - if succeeded send good SCSI response
> >>     - if failed send SCSI bad response with appropriate sense buffer
> >>
> >> Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
> >> ---
> >>   drivers/infiniband/ulp/isert/ib_isert.c |  321 ++++++++++++++++++++++++++++---
> >>   drivers/infiniband/ulp/isert/ib_isert.h |    1 +
> >>   2 files changed, 292 insertions(+), 30 deletions(-)
> >>
> >> diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
> >> index 3871ab2..04bdd79 100644
> >> --- a/drivers/infiniband/ulp/isert/ib_isert.c
> >> +++ b/drivers/infiniband/ulp/isert/ib_isert.c
> > <SNIP>
> >
> >> @@ -2454,26 +2708,33 @@ isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
> >>   		return rc;
> >>   	}
> >>   
> >> -	/*
> >> -	 * Build isert_conn->tx_desc for iSCSI response PDU and attach
> >> -	 */
> >> -	isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc);
> >> -	iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *)
> >> -			     &isert_cmd->tx_desc.iscsi_header);
> >> -	isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
> >> -	isert_init_send_wr(isert_conn, isert_cmd,
> >> -			   &isert_cmd->tx_desc.send_wr, true);
> >> +	if (se_cmd->prot_type == TARGET_PROT_NORMAL) {
> >> +		/*
> >> +		 * Build isert_conn->tx_desc for iSCSI response PDU and attach
> >> +		 */
> >> +		isert_create_send_desc(isert_conn, isert_cmd,
> >> +				       &isert_cmd->tx_desc);
> >> +		iscsit_build_rsp_pdu(cmd, conn, false, (struct iscsi_scsi_rsp *)
> >> +				     &isert_cmd->tx_desc.iscsi_header);
> >> +		isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc);
> >> +		isert_init_send_wr(isert_conn, isert_cmd,
> >> +				   &isert_cmd->tx_desc.send_wr, true);
> >> +		isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr;
> >> +	}
> >>   
> > So I'm fixing up some v3.14-rc6 context changes before applying this
> > series to for-next, and noticed something above..
> >
> > Namely, that iscsi_build_rsp_pdu() has been changed to pass 'false' as
> > it's second argument vs. the original case passing 'true'.  This boolean
> > controls the incrementing of the StatSN in the traditional response
> > header, which AFAICT should still be 'true' for this case.
> >
> > Is there a reason why this was changed..?
> 
> Well, it wrong... This probably was left around when I rebased to 3.14 
> (earlier versions incremented StatSN explicitly).
> I wonder how that works though...
> 
> Want me to fix and resend?
> 

Nah, fixing this in for-next now.

--nab

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]     [Yosemite Photos]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux