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Retain the immediate data param during login processing

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If a test sets the use_immediate_data parameter to ISCSI_IMMEDIATE_DATA_NO
for the iSCSI context, then the test expects that a data associated with
the Write command to be sent in a separate PDU.

But if for execute the command it is necessary to login on a target then
the use_immediate_data was previously set, will be rewrite during
the processing of the Login Response packet.

This happen during the iSCSI.iSCSIdatasn.iSCSIDataSnInvalid
(test_iscsi_datasn_invalid.c) test:

    --> iSCSI 114 SCSI: Write(10) LUN: 0x01 (LBA: 0x00000064, Len: 1)
    <-- iSCSI 114 Ready To Transfer
    --> iSCSI 578 SCSI: Data Out LUN: 0x01 (Write(10) Request Data)

    --> iSCSI 550 Login Command
Here we lose use_immediate_data value for iSCSI session.
    <-- iSCSI 426 Login Response (Success)
    --> iSCSI 114 SCSI: Test Unit Ready LUN: 0x01
    <-- iSCSI 114 SCSI: Response LUN: 0x01 (Test Unit Ready) (Good)
And this Write command includes payload into iSCSI PDU packet, but should not do it.
    --> iSCSI 578 SCSI: Write(10) LUN: 0x01 (LBA: 0x00000064, Len: 1)SCSI: Data Out LUN: 0x01 (Write(10) Request Data)
    <-- iSCSI 114 SCSI: Response LUN: 0x01 (Write(10)) (Good)

    --> iSCSI 114 SCSI: Write(10) LUN: 0x01 (LBA: 0x00000064, Len: 2)
    <-- iSCSI 114 Ready To Transfer
    --> iSCSI 578 SCSI: Data Out LUN: 0x01 (Write(10) Request Data)
    --> iSCSI 626 SCSI: Data Out LUN: 0x01 (Write(10) Request Data)

Signed-off-by: Sergey Samoylenko <s.samoylenko@yadro.com>
This commit is contained in:
Sergey Samoylenko
2022-03-08 18:48:01 +00:00
committed by Bart Van Assche
parent 2674070fb8
commit fbfa387d9a
1 changed files with 0 additions and 3 deletions
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3
lib/login.c
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@@ -1220,9 +1220,6 @@ iscsi_process_login_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
* the target said. ImmediateData is NO.
*/
iscsi->use_immediate_data = ISCSI_IMMEDIATE_DATA_NO;
} else {
iscsi->use_immediate_data = ISCSI_IMMEDIATE_DATA_YES;
}
}