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authorChristoph Hellwig <hch@lst.de>2015-08-27 14:16:57 +0200
committerJames Bottomley <JBottomley@Odin.com>2015-08-28 13:14:56 -0700
commit086b91d052ebe4ead5d28021afe3bdfd70af15bf (patch)
treef168084b13c2fbf924f45567c7b749962eff5f4d /drivers/scsi/scsi_priv.h
parentdaaa858b7a6bb497f11c2aae555053b9c047824b (diff)
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scsi_dh: integrate into the core SCSI code
Stop building scsi_dh as a separate module and integrate it fully into the core SCSI code with explicit callouts at bus scan time. For now the callouts are placed at the same point as the old bus notifiers were called, but in the future we will be able to look at ALUA INQUIRY data earlier on. Note that this also means that the device handler modules need to be loaded by the time we scan the bus. The next patches will add support for autoloading device handlers at bus scan time to make sure they are always loaded if they are enabled in the kernel config. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/scsi_priv.h')
-rw-r--r--drivers/scsi/scsi_priv.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index e3902fc66278..644bb7339b55 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -170,6 +170,15 @@ static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
extern struct async_domain scsi_sd_pm_domain;
extern struct async_domain scsi_sd_probe_domain;
+/* scsi_dh.c */
+#ifdef CONFIG_SCSI_DH
+int scsi_dh_add_device(struct scsi_device *sdev);
+void scsi_dh_remove_device(struct scsi_device *sdev);
+#else
+static inline int scsi_dh_add_device(struct scsi_device *sdev) { return 0; }
+static inline void scsi_dh_remove_device(struct scsi_device *sdev) { }
+#endif
+
/*
* internal scsi timeout functions: for use by mid-layer and transport
* classes.