lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[SCSI] tgt: add I_T nexus support

Browse Source 
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>
This commit is contained in:
FUJITA Tomonori
2007-07-11 15:08:17 +09:00
committed by James Bottomley
parent aebd5e476e
commit 2c47f9efbe
7 changed files with 161 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/scsi/scsi_host.h
View File

@ -146,7 +146,7 @@ struct scsi_host_template {
void (*done)(struct scsi_cmnd *));
/* Used as callback for the completion of task management request. */
int (* tsk_mgmt_response)(u64 mid, int result);
int (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64 mid, int result);
/*
* This is an error handling strategy routine. You don't need to