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-rw-r--r--include/scsi/scsi_host.h26
1 files changed, 19 insertions, 7 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 81d5234f677..916144be208 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -429,12 +429,15 @@ struct scsi_host_template {
};
/*
- * shost states
+ * shost state: If you alter this, you also need to alter scsi_sysfs.c
+ * (for the ascii descriptions) and the state model enforcer:
+ * scsi_host_set_state()
*/
-enum {
- SHOST_ADD,
- SHOST_DEL,
+enum scsi_host_state {
+ SHOST_CREATED = 1,
+ SHOST_RUNNING,
SHOST_CANCEL,
+ SHOST_DEL,
SHOST_RECOVERY,
};
@@ -464,12 +467,10 @@ struct Scsi_Host {
struct task_struct * ehandler; /* Error recovery thread. */
struct semaphore * eh_wait; /* The error recovery thread waits
on this. */
- struct completion * eh_notify; /* wait for eh to begin or end */
struct semaphore * eh_action; /* Wait for specific actions on the
host. */
unsigned int eh_active:1; /* Indicates the eh thread is awake and active if
this is true. */
- unsigned int eh_kill:1; /* set when killing the eh thread */
wait_queue_head_t host_wait;
struct scsi_host_template *hostt;
struct scsi_transport_template *transportt;
@@ -575,7 +576,7 @@ struct Scsi_Host {
unsigned int irq;
- unsigned long shost_state;
+ enum scsi_host_state shost_state;
/* ldm bits */
struct device shost_gendev;
@@ -633,6 +634,7 @@ extern void scsi_remove_host(struct Scsi_Host *);
extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
extern void scsi_host_put(struct Scsi_Host *t);
extern struct Scsi_Host *scsi_host_lookup(unsigned short);
+extern const char *scsi_host_state_name(enum scsi_host_state);
extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *);
@@ -646,6 +648,15 @@ static inline struct device *scsi_get_device(struct Scsi_Host *shost)
return shost->shost_gendev.parent;
}
+/**
+ * scsi_host_scan_allowed - Is scanning of this host allowed
+ * @shost: Pointer to Scsi_Host.
+ **/
+static inline int scsi_host_scan_allowed(struct Scsi_Host *shost)
+{
+ return shost->shost_state == SHOST_RUNNING;
+}
+
extern void scsi_unblock_requests(struct Scsi_Host *);
extern void scsi_block_requests(struct Scsi_Host *);
@@ -663,5 +674,6 @@ extern struct scsi_device *scsi_get_host_dev(struct Scsi_Host *);
/* legacy interfaces */
extern struct Scsi_Host *scsi_register(struct scsi_host_template *, int);
extern void scsi_unregister(struct Scsi_Host *);
+extern int scsi_host_set_state(struct Scsi_Host *, enum scsi_host_state);
#endif /* _SCSI_SCSI_HOST_H */