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scsi: target/core: Add target_send_busy() 

Introduce a function that sends the SCSI status "BUSY" back to the
initiator. The next patch will add a call to this function in the srpt
target driver.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2019-01-25 10:34:47 -08:00 committed by Martin K. Petersen
parent 83f85b8ec3
commit 94ebb47160
2 changed files with 17 additions and 0 deletions
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16
drivers/target/target_core_transport.c
View File

@ -3246,6 +3246,22 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd,
} }
EXPORT_SYMBOL(transport_send_check_condition_and_sense); EXPORT_SYMBOL(transport_send_check_condition_and_sense);
/**
* target_send_busy - Send SCSI BUSY status back to the initiator
* @cmd: SCSI command for which to send a BUSY reply.
*
* Note: Only call this function if target_submit_cmd*() failed.
*/
int target_send_busy(struct se_cmd *cmd)
{
WARN_ON_ONCE(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB);
cmd->scsi_status = SAM_STAT_BUSY;
trace_target_cmd_complete(cmd);
return cmd->se_tfo->queue_status(cmd);
}
EXPORT_SYMBOL(target_send_busy);
static void target_tmr_work(struct work_struct *work) static void target_tmr_work(struct work_struct *work)
{ {
struct se_cmd *cmd = container_of(work, struct se_cmd, work); struct se_cmd *cmd = container_of(work, struct se_cmd, work);

1
include/target/target_core_fabric.h
View File

@ -173,6 +173,7 @@ int transport_generic_free_cmd(struct se_cmd *, int);
bool transport_wait_for_tasks(struct se_cmd *); bool transport_wait_for_tasks(struct se_cmd *);
int transport_send_check_condition_and_sense(struct se_cmd *, int transport_send_check_condition_and_sense(struct se_cmd *,
sense_reason_t, int); sense_reason_t, int);
int target_send_busy(struct se_cmd *cmd);
int target_get_sess_cmd(struct se_cmd *, bool); int target_get_sess_cmd(struct se_cmd *, bool);
int target_put_sess_cmd(struct se_cmd *); int target_put_sess_cmd(struct se_cmd *);
void target_sess_cmd_list_set_waiting(struct se_session *); void target_sess_cmd_list_set_waiting(struct se_session *);