michaelc@xxxxxxxxxxx wrote:
> From: Mike Christie <michaelc@xxxxxxxxxxx>
>
> Add a queueing helper which will return SCSI_MLQUEUE_TARGET_BUSY
> if we are transitioning because there is no need to call into
> the driver anymore at that point.
>
> Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
> ---
> include/scsi/scsi_transport_fc.h | 33 +++++++++++++++++++++++++++++++++
> 1 files changed, 33 insertions(+), 0 deletions(-)
>
> diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
> index 4769efd..62a6a74 100644
> --- a/include/scsi/scsi_transport_fc.h
> +++ b/include/scsi/scsi_transport_fc.h
> @@ -29,6 +29,7 @@
>
> #include <linux/sched.h>
> #include <scsi/scsi.h>
> +#include <scsi/scsi_cmnd.h>
> #include <scsi/scsi_netlink.h>
>
> struct scsi_transport_template;
> @@ -640,6 +641,38 @@ struct fc_function_template {
> unsigned long disable_target_scan:1;
> };
>
> +/**
> + * fc_remote_port_queue_ready - called to validate the remote port state
> + * @rport: remote port to be checked
> + *
> + * Returns 0 if IO can be queued or if there the cmd should be
Remove "there" from the comment.
> + * completed by a call to cmd->scsi_done. Caller must check cmd->result.
> + * Returns SCSI_MLQUEUE value if IO cannot be queued temporarily.
How 'bout: "Returns a SCSI_MLQUEUE value if the IO cannot be queued due
to an rport state transition." ?
> + **/
> +static inline int
> +fc_remote_port_queue_ready(struct fc_rport *rport, struct scsi_cmnd *cmd)
> +{
> + int result = 0;
> +
> + cmd->result = 0;
> + switch (rport->port_state) {
> + case FC_PORTSTATE_ONLINE:
> + if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
> + result = 0;
> + else if (rport->flags & FC_RPORT_DEVLOSS_PENDING)
> + result = SCSI_MLQUEUE_TARGET_BUSY;
> + else
> + cmd->result = DID_NO_CONNECT << 16;
> + break;
> + case FC_PORTSTATE_BLOCKED:
> + result = SCSI_MLQUEUE_TARGET_BUSY;
> + break;
> + default:
> + cmd->result = DID_NO_CONNECT << 16;
> + break;
> + }
> + return result;
> +}
>
> /**
> * fc_remote_port_chkready - called to validate the remote port state
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
