• Bart Van Assche's avatar
    scsi: target/core: Fix TAS handling for aborted commands · aaa00cc9
    Bart Van Assche authored
    The TASK ABORTED STATUS (TAS) bit is defined as follows in SAM:
    "TASK_ABORTED: this status shall be returned if a command is aborted by a
    command or task management function on another I_T nexus and the control
    mode page TAS bit is set to one". TAS handling is spread over the target
    core and the iSCSI target driver. If a LUN RESET is received, the target
    core will send the TASK_ABORTED response for all commands for which such a
    response has to be sent. If an ABORT TASK is received, only the iSCSI
    target driver will send the TASK_ABORTED response for the commands for
    which that response has to be sent.  That is a bug since all target drivers
    have to honor the TAS bit. Fix this by moving the code that handles TAS
    from the iSCSI target driver into the target core. Additionally, if a
    command has been aborted, instead of sending the TASK_ABORTED status from
    the context that processes the SCSI command send it from the context of the
    ABORT TMF.  The core_tmr_abort_task() change in this patch causes the
    CMD_T_TAS flag to be set if a TASK_ABORTED status has to be sent back to
    the initiator that submitted the command. If that flag has been set
    transport_cmd_finish_abort() will send the TASK_ABORTED response.
    
    Cc: Nicholas Bellinger <nab@linux-iscsi.org>
    Cc: Mike Christie <mchristi@redhat.com>
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: David Disseldorp <ddiss@suse.de>
    Cc: Hannes Reinecke <hare@suse.de>
    Signed-off-by: default avatarBart Van Assche <bvanassche@acm.org>
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    aaa00cc9
target_core_base.h 26.8 KB