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authorHannes Reinecke <hare@suse.de>2008-07-17 17:49:02 -0700
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-07-26 15:14:53 -0400
commitae11b1b36da726a8a93409b896704edc6b4f3402 (patch)
tree737e3602cb426c87f64ad26ccbfc12ce707d7b9e /include/scsi/scsi_dh.h
parent057ea7c9683c3d684128cced796f03c179ecf1c2 (diff)
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[SCSI] scsi_dh: attach to hardware handler from dm-mpath
multipath keeps a separate device table which may be more current than the built-in one. So we should make sure to always call ->attach whenever a multipath map with hardware handler is instantiated. And we should call ->detach on removal, too. [sekharan: update as per comments from agk] Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include/scsi/scsi_dh.h')
-rw-r--r--include/scsi/scsi_dh.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h
index e15e2aade69c..33efce20c26c 100644
--- a/include/scsi/scsi_dh.h
+++ b/include/scsi/scsi_dh.h
@@ -58,6 +58,8 @@ enum {
#if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE)
extern int scsi_dh_activate(struct request_queue *);
extern int scsi_dh_handler_exist(const char *);
+extern int scsi_dh_attach(struct request_queue *, const char *);
+extern void scsi_dh_detach(struct request_queue *);
#else
static inline int scsi_dh_activate(struct request_queue *req)
{
@@ -67,4 +69,12 @@ static inline int scsi_dh_handler_exist(const char *name)
{
return 0;
}
+static inline int scsi_dh_attach(struct request_queue *req, const char *name)
+{
+ return SCSI_DH_NOSYS;
+}
+static inline void scsi_dh_detach(struct request_queue *q)
+{
+ return;
+}
#endif