FUJITA Tomonori
2006-Aug-02 08:32 UTC
[Xen-devel] [PATCH 1/6] scsifront/back drivers'' common Makefile and header
# HG changeset patch
# User fujita.tomonori@lab.ntt.co.jp
# Node ID 7111077b493ea53ef055ce38098f8af67f87d749
# Parent ed8d345449c176cb5fe0ccff4299da782eb63c08
SCSI frontend and backend drivers'' common Makefile and header
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
diff -r ed8d345449c1 -r 7111077b493e buildconfigs/linux-defconfig_xen0_x86_32
--- a/buildconfigs/linux-defconfig_xen0_x86_32 Wed Aug 02 15:11:34 2006 +0900
+++ b/buildconfigs/linux-defconfig_xen0_x86_32 Wed Aug 02 15:14:15 2006 +0900
@@ -491,6 +491,7 @@ CONFIG_IDEDMA_AUTO=y
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
+CONFIG_SCSI_TGT=y
CONFIG_SCSI_PROC_FS=y
#
@@ -580,6 +581,7 @@ CONFIG_SCSI_SATA_INTEL_COMBINED=y
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set
+# CONFIG_SCSI_SRP is not set
#
# Multi-device support (RAID and LVM)
@@ -1322,11 +1324,13 @@ CONFIG_XEN_PCIDEV_BACKEND_PASS=y
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
# CONFIG_XEN_PCIDEV_BE_DEBUG is not set
CONFIG_XEN_BLKDEV_BACKEND=y
+CONFIG_XEN_SCSI_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=y
# CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER is not set
CONFIG_XEN_NETDEV_LOOPBACK=y
# CONFIG_XEN_TPMDEV_BACKEND is not set
CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_SCSI_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DISABLE_SERIAL=y
diff -r ed8d345449c1 -r 7111077b493e buildconfigs/linux-defconfig_xen_x86_32
--- a/buildconfigs/linux-defconfig_xen_x86_32 Wed Aug 02 15:11:34 2006 +0900
+++ b/buildconfigs/linux-defconfig_xen_x86_32 Wed Aug 02 15:14:15 2006 +0900
@@ -1049,13 +1049,14 @@ CONFIG_IDEDMA_AUTO=y
# SCSI device support
#
CONFIG_RAID_ATTRS=m
-CONFIG_SCSI=m
+CONFIG_SCSI=y
+CONFIG_SCSI_TGT=y
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
-CONFIG_BLK_DEV_SD=m
+CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
@@ -1157,6 +1158,7 @@ CONFIG_SCSI_DC390T=m
CONFIG_SCSI_DC390T=m
CONFIG_SCSI_NSP32=m
CONFIG_SCSI_DEBUG=m
+# CONFIG_SCSI_SRP is not set
#
# PCMCIA SCSI adapter support
@@ -3022,11 +3024,13 @@ CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
# CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
# CONFIG_XEN_PCIDEV_BE_DEBUG is not set
CONFIG_XEN_BLKDEV_BACKEND=y
+CONFIG_XEN_SCSI_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=y
# CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER is not set
CONFIG_XEN_NETDEV_LOOPBACK=y
# CONFIG_XEN_TPMDEV_BACKEND is not set
CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_SCSI_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DISABLE_SERIAL=y
diff -r ed8d345449c1 -r 7111077b493e linux-2.6-xen-sparse/drivers/xen/Kconfig
--- a/linux-2.6-xen-sparse/drivers/xen/Kconfig Wed Aug 02 15:11:34 2006 +0900
+++ b/linux-2.6-xen-sparse/drivers/xen/Kconfig Wed Aug 02 15:14:15 2006 +0900
@@ -84,6 +84,17 @@ config XEN_BLKDEV_BACKEND
block devices to other guests via a high-performance shared-memory
interface.
+config XEN_SCSI_BACKEND
+ tristate "SCSI backend driver"
+ depends on XEN_BACKEND && SCSI_TGT
+ default y
+ help
+ The SCSI backend driver allows the kernel to export its SCSI HBAs
+ to other guests via a high-performance shared-memory interface.
+ SCSI requests are redirected to userspace through netlink interface.
+ The user-space daemon can export disk images, which may be implemented
+ as files, in memory, or on other hosts across the network.
+
config XEN_NETDEV_BACKEND
tristate "Network-device backend driver"
depends on XEN_BACKEND && NET
@@ -140,6 +151,14 @@ config XEN_BLKDEV_FRONTEND
dedicated device-driver domain, or your master control domain
(domain 0), then you almost certainly want to say Y here.
+config XEN_SCSI_FRONTEND
+ tristate "SCSI frontend driver"
+ depends on XEN && SCSI
+ default y
+ help
+ The SCSI frontend driver allows the kernel to access SCSI HBAs
+ within another guest OS.
+
config XEN_NETDEV_FRONTEND
tristate "Network-device frontend driver"
depends on XEN && NET
diff -r ed8d345449c1 -r 7111077b493e linux-2.6-xen-sparse/drivers/xen/Makefile
--- a/linux-2.6-xen-sparse/drivers/xen/Makefile Wed Aug 02 15:11:34 2006 +0900
+++ b/linux-2.6-xen-sparse/drivers/xen/Makefile Wed Aug 02 15:14:15 2006 +0900
@@ -8,9 +8,11 @@ obj-$(CONFIG_XEN_BALLOON) += balloon/
obj-$(CONFIG_XEN_BALLOON) += balloon/
obj-$(CONFIG_XEN_DEVMEM) += char/
obj-$(CONFIG_XEN_BLKDEV_BACKEND) += blkback/
+obj-$(CONFIG_XEN_SCSI_BACKEND) += scsiback/
obj-$(CONFIG_XEN_NETDEV_BACKEND) += netback/
obj-$(CONFIG_XEN_TPMDEV_BACKEND) += tpmback/
obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += blkfront/
+obj-$(CONFIG_XEN_SCSI_FRONTEND) += scsifront/
obj-$(CONFIG_XEN_NETDEV_FRONTEND) += netfront/
obj-$(CONFIG_XEN_PCIDEV_BACKEND) += pciback/
obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += pcifront/
diff -r ed8d345449c1 -r 7111077b493e xen/include/public/io/scsi.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/include/public/io/scsi.h Wed Aug 02 15:14:15 2006 +0900
@@ -0,0 +1,41 @@
+#ifndef __XEN__PUBLIC_IO_SCSI_H__
+#define __XEN__PUBLIC_IO_SCSI_H__
+
+#include "ring.h"
+
+#define SRP_MAX_IU_LEN 256
+#define SRP_CAN_QUEUE 8
+
+struct scsi_request {
+ char buf[SRP_MAX_IU_LEN];
+};
+
+struct scsi_response {
+ char buf[sizeof(struct srp_rsp)];
+};
+
+DEFINE_RING_TYPES(scsi, struct scsi_request, struct scsi_response);
+
+#define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \
+ sizeof (struct srp_cmd) - \
+ sizeof (struct srp_indirect_buf)) / 16)
+
+#define SRP_MAPPED_PAGES (SRP_CAN_QUEUE * SRP_MAX_INDIRECT)
+#define SRP_RING_PAGES (((sizeof(struct scsi_iovec) * SRP_CAN_QUEUE) \
+ + PAGE_SIZE - 1) >> PAGE_SHIFT)
+
+struct scsi_iovec {
+ u32 iovcnt;
+ struct iovec iov[SRP_MAX_INDIRECT];
+} __attribute__((packed));
+
+/*
+ * srp_cmd : 48 bytes
+ * srp_direct_buf : 16 bytes
+ * srp_indirect_buf : 20 bytes
+ * SRP_MAX_INDIRECT : 11
+ * SRP_MAX_MAPPED_PAGES : 88
+ * SRP_RING_PAGES : 1
+ */
+
+#endif
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Jeff Garzik
2006-Aug-02 22:23 UTC
Re: [Xen-devel] [PATCH 1/6] scsifront/back drivers'' common Makefile and header
ACK scsifront and scsiback... nice work. Much more complete than what I''ve been poking at. Regards, Jeff _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
FUJITA Tomonori
2006-Aug-03 04:15 UTC
Re: [Xen-devel] [PATCH 1/6] scsifront/back drivers'' common Makefile and header
From: Jeff Garzik <jeff@garzik.org> Subject: Re: [Xen-devel] [PATCH 1/6] scsifront/back drivers'' common Makefile and header Date: Wed, 02 Aug 2006 18:23:18 -0400> ACK scsifront and scsiback... nice work. Much more complete than what > I''ve been poking at.Thanks, Next time I will bring some performance results. If its performance is good enough for inclusion in Xen main tree, I go to linux-scsi for discussion about mainline inclusion. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel