Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dd172d72addefd89795e819cc2cc3eb1b9d12a7f
Commit: dd172d72addefd89795e819cc2cc3eb1b9d12a7f
Parent: fc1ff9588a6d56258ff9576a31aa34f17757c666
Author: Chandra Seetharaman [EMAIL PROTECTED]
AuthorDate: Thu Jul 12 17:30:05 2007 +0100
Committer: Linus Torvalds [EMAIL PROTECTED]
CommitDate: Thu Jul 12 15:01:23 2007 -0700
dm mpath: rdac
This patch supports LSI/Engenio devices in RDAC mode. Like dm-emc
it requires userspace support. In your multipath.conf file you must have:
path_checkerrdac
hardware_handler1 rdac
prio_callout/sbin/mpath_prio_tpc /dev/%n
And you also then must have a updated multipath tools release which
has rdac support.
Signed-off-by: Chandra Seetharaman [EMAIL PROTECTED]
Signed-off-by: Mike Christie [EMAIL PROTECTED]
Signed-off-by: Alasdair G Kergon [EMAIL PROTECTED]
Signed-off-by: Linus Torvalds [EMAIL PROTECTED]
---
drivers/md/Kconfig |6 +
drivers/md/Makefile|2 +
drivers/md/dm-mpath-rdac.c | 700
3 files changed, 708 insertions(+), 0 deletions(-)
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 7df934d..466909f 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -262,6 +262,12 @@ config DM_MULTIPATH_EMC
---help---
Multipath support for EMC CX/AX series hardware.
+config DM_MULTIPATH_RDAC
+ tristate LSI/Engenio RDAC multipath support (EXPERIMENTAL)
+ depends on DM_MULTIPATH BLK_DEV_DM EXPERIMENTAL
+ ---help---
+ Multipath support for LSI/Engenio RDAC.
+
config DM_DELAY
tristate I/O delaying target (EXPERIMENTAL)
depends on BLK_DEV_DM EXPERIMENTAL
diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 3875408..2c45d76 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -7,6 +7,7 @@ dm-mod-objs := dm.o dm-table.o dm-target.o dm-linear.o
dm-stripe.o \
dm-multipath-objs := dm-hw-handler.o dm-path-selector.o dm-mpath.o
dm-snapshot-objs := dm-snap.o dm-exception-store.o
dm-mirror-objs := dm-log.o dm-raid1.o
+dm-rdac-objs := dm-mpath-rdac.o
md-mod-objs := md.o bitmap.o
raid456-objs := raid5.o raid6algos.o raid6recov.o raid6tables.o \
raid6int1.o raid6int2.o raid6int4.o \
@@ -34,6 +35,7 @@ obj-$(CONFIG_DM_CRYPT)+= dm-crypt.o
obj-$(CONFIG_DM_DELAY) += dm-delay.o
obj-$(CONFIG_DM_MULTIPATH) += dm-multipath.o dm-round-robin.o
obj-$(CONFIG_DM_MULTIPATH_EMC) += dm-emc.o
+obj-$(CONFIG_DM_MULTIPATH_RDAC)+= dm-rdac.o
obj-$(CONFIG_DM_SNAPSHOT) += dm-snapshot.o
obj-$(CONFIG_DM_MIRROR)+= dm-mirror.o
obj-$(CONFIG_DM_ZERO) += dm-zero.o
diff --git a/drivers/md/dm-mpath-rdac.c b/drivers/md/dm-mpath-rdac.c
new file mode 100644
index 000..8b776b8
--- /dev/null
+++ b/drivers/md/dm-mpath-rdac.c
@@ -0,0 +1,700 @@
+/*
+ * Engenio/LSI RDAC DM HW handler
+ *
+ * Copyright (C) 2005 Mike Christie. All rights reserved.
+ * Copyright (C) Chandra Seetharaman, IBM Corp. 2007
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+#include scsi/scsi.h
+#include scsi/scsi_cmnd.h
+#include scsi/scsi_eh.h
+
+#define DM_MSG_PREFIX multipath rdac
+
+#include dm.h
+#include dm-hw-handler.h
+
+#define RDAC_DM_HWH_NAME rdac
+#define RDAC_DM_HWH_VER 0.4
+
+/*
+ * LSI mode page stuff
+ *
+ * These struct definitions and the forming of the
+ * mode page were taken from the LSI RDAC 2.4 GPL'd
+ * driver, and then converted to Linux conventions.
+ */
+#define RDAC_QUIESCENCE_TIME 20;
+/*
+ * Page Codes
+ */
+#define RDAC_PAGE_CODE_REDUNDANT_CONTROLLER 0x2c
+
+/*
+ * Controller modes definitions
+ */
+#define RDAC_MODE_TRANSFER_ALL_LUNS0x01
+#define RDAC_MODE_TRANSFER_SPECIFIED_LUNS 0x02
+
+/*
+ * RDAC Options field
+ */
+#define RDAC_FORCED_QUIESENCE 0x02
+
+#define RDAC_FAILOVER_TIMEOUT (60 * HZ)
+
+struct rdac_mode_6_hdr {
+ u8 data_len;
+ u8 medium_type;
+ u8 device_params;
+ u8 block_desc_len;
+};
+
+struct rdac_mode_10_hdr {
+ u16 data_len;
+ u8 medium_type;
+ u8 device_params;
+ u16
