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authorFUJITA Tomonori <tomof@acm.org>2007-07-11 10:08:17 +0400
committerJames Bottomley <jejb@mulgrave.localdomain>2007-10-12 22:37:50 +0400
commit2c47f9efbedbe5749b6bb16e59bc11d6e460855f (patch)
treebfc1a2154f67c3aa45f92e586678ffc37e5f80eb /include/scsi/scsi_tgt.h
parentaebd5e476ecc8ceb53577b20f2a352ff4ceffd8d (diff)
downloadlinux-2c47f9efbedbe5749b6bb16e59bc11d6e460855f.tar.xz
[SCSI] tgt: add I_T nexus support
tgt uses scsi_host as I_T nexus. This works for ibmvstgt because it creates one scsi_host for one initiator. However, other target drivers don't work like that. This adds I_T nexus support, which enable one scsi_host to handle multiple initiators. New scsi_tgt_it_nexus_create/destroy functions are expected be called transport classes. For example, ibmvstgt creates an initiator remote port, then the srp transport calls tgt_it_nexus_create. tgt doesn't manages I_T nexus, instead it tells tgtd, user-space daemon, to create a new I_T nexus. On the receiving the response from tgtd, tgt calls shost->transportt->it_nexus_response. transports should notify a lld. The srp transport uses it_nexus_response callback in srp_function_template to do that. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi/scsi_tgt.h')
-rw-r--r--include/scsi/scsi_tgt.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/include/scsi/scsi_tgt.h b/include/scsi/scsi_tgt.h
index 4f4427937af2..d0fefb96158f 100644
--- a/include/scsi/scsi_tgt.h
+++ b/include/scsi/scsi_tgt.h
@@ -11,9 +11,11 @@ struct scsi_lun;
extern struct Scsi_Host *scsi_tgt_cmd_to_host(struct scsi_cmnd *);
extern int scsi_tgt_alloc_queue(struct Scsi_Host *);
extern void scsi_tgt_free_queue(struct Scsi_Host *);
-extern int scsi_tgt_queue_command(struct scsi_cmnd *, struct scsi_lun *, u64);
-extern int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *, int, u64, struct scsi_lun *,
- void *);
+extern int scsi_tgt_queue_command(struct scsi_cmnd *, u64, struct scsi_lun *, u64);
+extern int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *, u64, int, u64,
+ struct scsi_lun *, void *);
extern struct scsi_cmnd *scsi_host_get_command(struct Scsi_Host *,
enum dma_data_direction, gfp_t);
extern void scsi_host_put_command(struct Scsi_Host *, struct scsi_cmnd *);
+extern int scsi_tgt_it_nexus_create(struct Scsi_Host *, u64, char *);
+extern int scsi_tgt_it_nexus_destroy(struct Scsi_Host *, u64);