diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2012-06-26 14:32:03 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-07-20 08:58:42 +0100 |
| commit | 7e8a74b177f17d100916b6ad415450f7c9508691 (patch) | |
| tree | 3a2ed38f030ef3e79d3c332c594dbad89d7642bf /include/scsi | |
| parent | 6aca4112f67b67d0a2f60326a1331a4125564ca7 (diff) | |
[SCSI] scsi_dh: add scsi_dh_attached_handler_name
Introduce scsi_dh_attached_handler_name() to retrieve the name of the
scsi_dh that is attached to the scsi_device associated with the provided
request queue. Returns NULL if a scsi_dh is not attached.
Also, fix scsi_dh_{attach,detach} function header comments to document
@q rather than @sdev.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Tested-by: Babu Moger <babu.moger@netapp.com>
Reviewed-by: Chandra Seetharaman <sekharan@us.ibm.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_dh.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h index e3f2db212dd..620c723ee8e 100644 --- a/include/scsi/scsi_dh.h +++ b/include/scsi/scsi_dh.h @@ -60,6 +60,7 @@ extern int scsi_dh_activate(struct request_queue *, activate_complete, void *); 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 *); +extern const char *scsi_dh_attached_handler_name(struct request_queue *, gfp_t); extern int scsi_dh_set_params(struct request_queue *, const char *); #else static inline int scsi_dh_activate(struct request_queue *req, @@ -80,6 +81,11 @@ static inline void scsi_dh_detach(struct request_queue *q) { return; } +static inline const char *scsi_dh_attached_handler_name(struct request_queue *q, + gfp_t gfp) +{ + return NULL; +} static inline int scsi_dh_set_params(struct request_queue *req, const char *params) { return -SCSI_DH_NOSYS; |