[Qemu-devel] [PATCH 1/1] iscsi: add iSCSI block device support

[ronnie sahlberg]

List,

Please find attached a gzipped patch against master that adds support of iSCSI.
It is sent in gz format because of its uncompressed size, >100kb.


This patch adds support for attaching directorly to iSCSI resources,
both DISK/SBC and CDROM/MMC, without the need to make the devices
visible to the host.

There are two parts to this support :

./block/iscsi/* : This is a fully async iscsi initiator client
library. This directory does not contain any QEMU specific code with
the hope it can later be re-used by other projects that also need
iscsi-initiator functionality.

./block/iscsi.c : The QEMU block driver that intergrates the
iscsi-initiator library with QEMU.


The iscsi library is incomplete, but sufficient to interoperate with
TGTD. With trivial enhancements(target-NOP) it should work with most
other targets too.

The goal is to expand the library to add more features over time, so
that over time it will become a full-blown iscsi initiator
implementation as a library.

Some features that should be added are
* support for target initiated NOP.  TGTD does not use these but some
other targets do.
* support for uni- and bi-directional CHAP authentication.
* additional iscsi functionality

The syntax to specify a iscsi resource is
   iscsi://<host>[:port]/<target-iqn-name>/<lun>

Example :
   -drive file=iscsi://127.0.0.1:3260/iqn.ronnie.test/1

  -cdrom iscsi://127.0.0.1:3260/iqn.ronnie.test/2


Please review and/or commit.


regards
ronnie sahlberg