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-rw-r--r--include/scsi/scsi_host.h24
1 files changed, 19 insertions, 5 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 81d5234f677..ac1b6125e3a 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -429,12 +429,15 @@ struct scsi_host_template {
429}; 429};
430 430
431/* 431/*
432 * shost states 432 * shost state: If you alter this, you also need to alter scsi_sysfs.c
433 * (for the ascii descriptions) and the state model enforcer:
434 * scsi_host_set_state()
433 */ 435 */
434enum { 436enum scsi_host_state {
435 SHOST_ADD, 437 SHOST_CREATED = 1,
436 SHOST_DEL, 438 SHOST_RUNNING,
437 SHOST_CANCEL, 439 SHOST_CANCEL,
440 SHOST_DEL,
438 SHOST_RECOVERY, 441 SHOST_RECOVERY,
439}; 442};
440 443
@@ -575,7 +578,7 @@ struct Scsi_Host {
575 unsigned int irq; 578 unsigned int irq;
576 579
577 580
578 unsigned long shost_state; 581 enum scsi_host_state shost_state;
579 582
580 /* ldm bits */ 583 /* ldm bits */
581 struct device shost_gendev; 584 struct device shost_gendev;
@@ -633,6 +636,7 @@ extern void scsi_remove_host(struct Scsi_Host *);
633extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *); 636extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
634extern void scsi_host_put(struct Scsi_Host *t); 637extern void scsi_host_put(struct Scsi_Host *t);
635extern struct Scsi_Host *scsi_host_lookup(unsigned short); 638extern struct Scsi_Host *scsi_host_lookup(unsigned short);
639extern const char *scsi_host_state_name(enum scsi_host_state);
636 640
637extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *); 641extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
638 642
@@ -646,6 +650,15 @@ static inline struct device *scsi_get_device(struct Scsi_Host *shost)
646 return shost->shost_gendev.parent; 650 return shost->shost_gendev.parent;
647} 651}
648 652
653/**
654 * scsi_host_scan_allowed - Is scanning of this host allowed
655 * @shost: Pointer to Scsi_Host.
656 **/
657static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
658{
659 return shost->shost_state == SHOST_RUNNING;
660}
661
649extern void scsi_unblock_requests(struct Scsi_Host *); 662extern void scsi_unblock_requests(struct Scsi_Host *);
650extern void scsi_block_requests(struct Scsi_Host *); 663extern void scsi_block_requests(struct Scsi_Host *);
651 664
@@ -663,5 +676,6 @@ extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
663/* legacy interfaces */ 676/* legacy interfaces */
664extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int); 677extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
665extern void scsi_unregister(struct Scsi_Host *); 678extern void scsi_unregister(struct Scsi_Host *);
679extern int scsi_host_set_state(struct Scsi_Host *, enum scsi_host_state);
666 680
667#endif /* _SCSI_SCSI_HOST_H */ 681#endif /* _SCSI_SCSI_HOST_H */