This is basically just a wrapper around blk_mq_queue_busy_iter(), so that LLDs don't have to deal with or worry about blk-mq hardware queues.
Signed-off-by: Jens Axboe <[email protected]> --- drivers/scsi/scsi_lib.c | 25 +++++++++++++++++++++++++ include/scsi/scsi_device.h | 3 +++ 2 files changed, 28 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 54d7a6cbb98a..87a4c53c8b48 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -648,6 +648,31 @@ static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd) } } +struct scsi_mq_iter_data { + scsi_scmd_iter *fn; + void *priv; +}; + +static bool scsi_mq_iter_fn(struct blk_mq_hw_ctx *hctx, struct request *rq, + void *priv, bool reserved) +{ + struct scsi_mq_iter_data *data = priv; + struct scsi_cmnd *scmd = rq->special; + + return data->fn(scmd, data->priv); +} + +void scsi_mq_scmd_busy_iter(struct scsi_device *sdev, scsi_scmd_iter *fn, + void *priv) +{ + struct scsi_mq_iter_data data; + + data.fn = fn; + data.priv = priv; + blk_mq_queue_busy_iter(sdev->request_queue, scsi_mq_iter_fn, &data); +} +EXPORT_SYMBOL(scsi_mq_scmd_busy_iter); + /* * Function: scsi_release_buffers() * diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index a4c9336811d1..9250b03613f2 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -536,4 +536,7 @@ static inline int scsi_device_tpgs(struct scsi_device *sdev) MODULE_ALIAS("scsi:t-" __stringify(type) "*") #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" +typedef bool (scsi_scmd_iter)(struct scsi_cmnd *, void *); +void scsi_mq_scmd_busy_iter(struct scsi_device *sdev, scsi_scmd_iter *fn, void *priv); + #endif /* _SCSI_SCSI_DEVICE_H */ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
