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authorJames Smart <James.Smart@Emulex.Com>2009-03-26 13:33:19 -0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-06-12 14:20:05 -0500
commit9e4f5e29610162fd426366f3b29e3cc6e575b858 (patch)
treeaad7fed6b70d87bc9aae10563fa1e71535b11de9 /Documentation/scsi
parente349792a385ed47390d156155b1a1e19af1bf163 (diff)
[SCSI] FC Pass Thru support
Attached is the ELS/CT pass-thru patch for the FC Transport. The patch creates a generic framework that lays on top of bsg and the SGIO v4 ioctl in order to pass transaction requests to LLDD's. The interface supports the following operations: On an fc_host basis: Request login to the specified N_Port_ID, creating an fc_rport. Request logout of the specified N_Port_ID, deleting an fc_rport Send ELS request to specified N_Port_ID w/o requiring a login, and wait for ELS response. Send CT request to specified N_Port_ID and wait for CT response. Login is required, but LLDD is allowed to manage login and decide whether it stays in place after the request is satisfied. Vendor-Unique request. Allows a LLDD-specific request to be passed to the LLDD, and the passing of a response back to the application. On an fc_rport basis: Send ELS request to nport and wait for ELS response. Send CT request to nport and wait for CT response. The patch also exports several headers from include/scsi such that they can be available to user-space applications: include/scsi/scsi.h include/scsi/scsi_netlink.h include/scsi/scsi_netlink_fc.h include/scsi/scsi_bsg_fc.h For further information, refer to the last RFC: http://marc.info/?l=linux-scsi&m=123436574018579&w=2 Note: Documentation is still spotty and will be added later. [bharrosh@panasas.com: update for new block API] Signed-off-by: James Smart <james.smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'Documentation/scsi')
-rw-r--r--Documentation/scsi/scsi_fc_transport.txt14
-rw-r--r--Documentation/scsi/scsi_mid_low_api.txt5
2 files changed, 17 insertions, 2 deletions
diff --git a/Documentation/scsi/scsi_fc_transport.txt b/Documentation/scsi/scsi_fc_transport.txt
index e5b071d46619..d7f181701dc2 100644
--- a/Documentation/scsi/scsi_fc_transport.txt
+++ b/Documentation/scsi/scsi_fc_transport.txt
@@ -1,10 +1,11 @@
SCSI FC Tansport
=============================================
-Date: 4/12/2007
+Date: 11/18/2008
Kernel Revisions for features:
rports : <<TBS>>
- vports : 2.6.22 (? TBD)
+ vports : 2.6.22
+ bsg support : 2.6.30 (?TBD?)
Introduction
@@ -15,6 +16,7 @@ The FC transport can be found at:
drivers/scsi/scsi_transport_fc.c
include/scsi/scsi_transport_fc.h
include/scsi/scsi_netlink_fc.h
+ include/scsi/scsi_bsg_fc.h
This file is found at Documentation/scsi/scsi_fc_transport.txt
@@ -472,6 +474,14 @@ int
fc_vport_terminate(struct fc_vport *vport)
+FC BSG support (CT & ELS passthru, and more)
+========================================================================
+<< To Be Supplied >>
+
+
+
+
+
Credits
=======
The following people have contributed to this document:
diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
index a6d5354639b2..de67229251d8 100644
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ b/Documentation/scsi/scsi_mid_low_api.txt
@@ -1271,6 +1271,11 @@ of interest:
hostdata[0] - area reserved for LLD at end of struct Scsi_Host. Size
is set by the second argument (named 'xtr_bytes') to
scsi_host_alloc() or scsi_register().
+ vendor_id - a unique value that identifies the vendor supplying
+ the LLD for the Scsi_Host. Used most often in validating
+ vendor-specific message requests. Value consists of an
+ identifier type and a vendor-specific value.
+ See scsi_netlink.h for a description of valid formats.
The scsi_host structure is defined in include/scsi/scsi_host.h

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