Add to function to check whether implicit support is available, as this will be the general check for ALUA support and no DH support.
Signed-off-by: John Garry <[email protected]> --- drivers/scsi/scsi_alua.c | 7 +++++++ include/scsi/scsi_alua.h | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/scsi/scsi_alua.c b/drivers/scsi/scsi_alua.c index c269105dbae4a..d3fcd887e5018 100644 --- a/drivers/scsi/scsi_alua.c +++ b/drivers/scsi/scsi_alua.c @@ -631,6 +631,13 @@ blk_status_t scsi_alua_prep_fn(struct scsi_device *sdev, struct request *req) } EXPORT_SYMBOL_GPL(scsi_alua_prep_fn); +bool scsi_device_alua_implicit(struct scsi_device *sdev) +{ + if (!sdev->alua) + return false; + return sdev->alua->tpgs & TPGS_MODE_IMPLICIT; +} + int scsi_alua_init(void) { kalua_wq = alloc_workqueue("kalua", WQ_MEM_RECLAIM | WQ_PERCPU, 0); diff --git a/include/scsi/scsi_alua.h b/include/scsi/scsi_alua.h index c16d4adc915ec..2d5db944f75b7 100644 --- a/include/scsi/scsi_alua.h +++ b/include/scsi/scsi_alua.h @@ -40,6 +40,8 @@ int scsi_alua_stpg_run(struct scsi_device *sdev, bool optimize); blk_status_t scsi_alua_prep_fn(struct scsi_device *sdev, struct request *req); +bool scsi_device_alua_implicit(struct scsi_device *sdev); + int scsi_alua_init(void); void scsi_exit_alua(void); #else //CONFIG_SCSI_ALUA @@ -64,6 +66,10 @@ blk_status_t scsi_alua_prep_fn(struct scsi_device *sdev, struct request *req) { return BLK_STS_OK; } +static inline bool scsi_device_alua_implicit(struct scsi_device *sdev) +{ + return false; +} static inline int scsi_alua_sdev_init(struct scsi_device *sdev) { return 0; -- 2.43.5
