diff options
| author |   Hannes Reinecke <hare@suse.de> | 2008-07-17 17:49:02 -0700 |
|---|---|---|
| committer |   James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-07-26 15:14:53 -0400 |
| commit | ae11b1b36da726a8a93409b896704edc6b4f3402 (patch) | |
| tree | 737e3602cb426c87f64ad26ccbfc12ce707d7b9e /include/scsi/scsi_dh.h | |
| parent | [SCSI] scsi_dh: add generic SPC-3 alua handler (diff) | |
| download | linux-dev-ae11b1b36da726a8a93409b896704edc6b4f3402.tar.xz linux-dev-ae11b1b36da726a8a93409b896704edc6b4f3402.zip | |
[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.h | 10 |
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 |