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author | Juergen Gross <jgross@suse.com> | 2014-08-28 06:44:12 +0200 |
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committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-09-23 13:36:19 +0000 |
commit | d9d660f6e562a47b4065eeb7e538910b0471b988 (patch) | |
tree | c24c55c66e0778c71e3a1ae960ce352544e06567 /drivers/xen/Kconfig | |
parent | 8beb8d4c91d652617dc992de565ec9904361c33e (diff) | |
download | op-kernel-dev-d9d660f6e562a47b4065eeb7e538910b0471b988.zip op-kernel-dev-d9d660f6e562a47b4065eeb7e538910b0471b988.tar.gz |
xen-scsiback: Add Xen PV SCSI backend driver
Introduces the Xen pvSCSI backend. With pvSCSI it is possible for a
Xen domU to issue SCSI commands to a SCSI LUN assigned to that
domU. The SCSI commands are passed to the pvSCSI backend in a driver
domain (usually Dom0) which is owner of the physical device. This
allows e.g. to use SCSI tape drives in a Xen domU.
The code is taken from the pvSCSI implementation in Xen done by
Fujitsu based on Linux kernel 2.6.18.
Changes from the original version are:
- port to upstream kernel
- put all code in just one source file
- adapt to Linux style guide
- use target core infrastructure instead doing pure pass-through
- enable module unloading
- support SG-list in grant page(s)
- support task abort
- remove redundant struct backend
- allocate resources dynamically
- correct minor error in scsiback_fast_flush_area
- free allocated resources in case of error during I/O preparation
- remove CDB emulation, now handled by target core infrastructure
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen/Kconfig')
-rw-r--r-- | drivers/xen/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index 8bc0183..b812462 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -172,6 +172,15 @@ config XEN_PCIDEV_BACKEND If in doubt, say m. +config XEN_SCSI_BACKEND + tristate "XEN SCSI backend driver" + depends on XEN && XEN_BACKEND && TARGET_CORE + help + The SCSI backend driver allows the kernel to export its SCSI Devices + to other guests via a high-performance shared-memory interface. + Only needed for systems running as XEN driver domains (e.g. Dom0) and + if guests need generic access to SCSI devices. + config XEN_PRIVCMD tristate depends on XEN |