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/linux/include/scsi/
H A Dscsi_transport_iscsi.hdiff 55e51eda4820ec5a1c1fc8693a51029f74eac2b9 Wed Mar 05 18:43:49 CET 2014 Sagi Grimberg <sagig@mellanox.com> SCSI/libiscsi: Add check_protection callback for transports

iSCSI needs to be at least aware that a task involves protection
information. In case it does, after the transaction completed libiscsi
will ask the transport to check the protection status of the
transaction.

Unlike transport errors, DIF errors should not prevent successful
completion of the transaction from the transport point of view, but
should be escelated to scsi mid-layer when constructing the scsi
result and sense data.

check_protection routine will return the ascq corresponding to the DIF
error that occured (or 0 if no error happened).

return ascq:
- 0x1: GUARD_CHECK_FAILED
- 0x2: APPTAG_CHECK_FAILED
- 0x3: REFTAG_CHECK_FAILED

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
H A Dlibiscsi.hdiff 55e51eda4820ec5a1c1fc8693a51029f74eac2b9 Wed Mar 05 18:43:49 CET 2014 Sagi Grimberg <sagig@mellanox.com> SCSI/libiscsi: Add check_protection callback for transports

iSCSI needs to be at least aware that a task involves protection
information. In case it does, after the transaction completed libiscsi
will ask the transport to check the protection status of the
transaction.

Unlike transport errors, DIF errors should not prevent successful
completion of the transaction from the transport point of view, but
should be escelated to scsi mid-layer when constructing the scsi
result and sense data.

check_protection routine will return the ascq corresponding to the DIF
error that occured (or 0 if no error happened).

return ascq:
- 0x1: GUARD_CHECK_FAILED
- 0x2: APPTAG_CHECK_FAILED
- 0x3: REFTAG_CHECK_FAILED

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
/linux/drivers/scsi/
H A Dlibiscsi.cdiff 55e51eda4820ec5a1c1fc8693a51029f74eac2b9 Wed Mar 05 18:43:49 CET 2014 Sagi Grimberg <sagig@mellanox.com> SCSI/libiscsi: Add check_protection callback for transports

iSCSI needs to be at least aware that a task involves protection
information. In case it does, after the transaction completed libiscsi
will ask the transport to check the protection status of the
transaction.

Unlike transport errors, DIF errors should not prevent successful
completion of the transaction from the transport point of view, but
should be escelated to scsi mid-layer when constructing the scsi
result and sense data.

check_protection routine will return the ascq corresponding to the DIF
error that occured (or 0 if no error happened).

return ascq:
- 0x1: GUARD_CHECK_FAILED
- 0x2: APPTAG_CHECK_FAILED
- 0x3: REFTAG_CHECK_FAILED

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>