Hey Mike -
Is this for HP active/passive support? Thanks.
- Rob
Mike Christie wrote:
This the basic handler but cleaned up. HP pointed me
to some qlogic code I can use to get more info so I
hope to integrate some of that code when I get a chance.
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
diff -Naurp linux-2.6.14-rc2/drivers/md/dm-hp-sw.c linux-2.6.14-rc2.work/drivers/md/dm-hp-sw.c
--- linux-2.6.14-rc2/drivers/md/dm-hp-sw.c 1969-12-31 18:00:00.000000000 -0600
+++ linux-2.6.14-rc2.work/drivers/md/dm-hp-sw.c 2005-09-30 14:12:58.000000000 -0500
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2005 Mike Christie, All rights reserved.
+ *
+ * This file is released under the GPL.
+ *
+ * Basic, very basic, support for HP StorageWorks and FSC FibreCat
+ */
+#include <scsi/scsi.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_dbg.h>
+
+#include "dm.h"
+#include "dm-hw-handler.h"
+
+static unsigned emc_rq_error(struct path *path, int result,
+ struct scsi_sense_hdr *sense)
+{
+ DMINFO("hp_sw: hp_sw_endio 0x%x", result);
+ /*
+ * TODO: get info from qlogic failover driver and
+ * eval sense/ASC/ASCQ
+ */
+ /*
+ * just return true and send down the IO to see
+ * if it worked for now
+ */
+ if (scsi_sense_valid(sense))
+ scsi_print_sense_hdr("dm-hp-sw", sense);
+ return 0;
+}
+
+static void hp_sw_pg_init(struct hw_handler *hwh, unsigned bypassed,
+ struct path *path)
+{
+ unsigned char cmd[MAX_COMMAND_SIZE];
+
+ memset(cmd, 0, MAX_COMMAND_SIZE);
+ cmd[0] = START_STOP;
+ /* Start spin cycle */
+ cmd[4] = 1;
+
+ DMINFO("hp_sw: queueing START_STOP command on %s",
+ path->dev->name);
+
+ if (dm_scsi_execute_rq(hwh, path, cmd, DMA_NONE, NULL, 0, 60 * HZ,
+ __GFP_WAIT))
+ dm_pg_init_complete(path, MP_FAIL_PATH);
+}
+
+/*
+ * Placeholders for coming code
+ */
+static int hp_sw_create(struct hw_handler *hwh, unsigned argc, char **argv)
+{
+ int err;
+
+ err = dm_scsi_init_context_pool(hwh);
+ if (err) {
+ DMERR("hp_sw: could not setup context pool");
+ return err;
+ }
+ return 0;
+}
+
+static void hp_sw_destroy(struct hw_handler *hwh)
+{
+ dm_scsi_destroy_context_pool(hwh);
+}
+
+static struct hw_handler_type hp_sw_hwh = {
+ .name = "hp_sw",
+ .module = THIS_MODULE,
+ .create = hp_sw_create,
+ .destroy = hp_sw_destroy,
+ .pg_init = hp_sw_pg_init,
+ .rq_error = emc_rq_error,
+};
+
+static int __init hp_sw_init(void)
+{
+ int r;
+
+ r = dm_register_hw_handler(&hp_sw_hwh);
+ if (r < 0)
+ DMERR("hp_sw: register failed %d", r);
+
+ DMINFO("hp_sw version 0.4 loaded");
+
+ return r;
+}
+
+static void __exit hp_sw_exit(void)
+{
+ int r;
+
+ r = dm_unregister_hw_handler(&hp_sw_hwh);
+ if (r < 0)
+ DMERR("hp_sw: unregister failed %d", r);
+}
+
+module_init(hp_sw_init);
+module_exit(hp_sw_exit);
+
+MODULE_DESCRIPTION("HP StorageWorks and FSC FibreCat support for dm-multipath");
+MODULE_AUTHOR("Mike Christie <michaelc@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff -Naurp linux-2.6.14-rc2/drivers/md/Kconfig linux-2.6.14-rc2.work/drivers/md/Kconfig
--- linux-2.6.14-rc2/drivers/md/Kconfig 2005-09-19 22:00:41.000000000 -0500
+++ linux-2.6.14-rc2.work/drivers/md/Kconfig 2005-09-30 00:05:37.000000000 -0500
@@ -236,5 +236,10 @@ config DM_MULTIPATH_EMC
---help---
Multipath support for EMC CX/AX series hardware.
+config DM_MULTIPATH_HP_SW
+ tristate "HP StorageWorks and FSC FibreCat support"
+ depends on DM_MULTIPATH && BLK_DEV_DM && EXPERIMENTAL
+ ---help---
+ HP StorageWorks and FSC FibreCat support for dm-multipath.
endmenu
diff -Naurp linux-2.6.14-rc2/drivers/md/Makefile linux-2.6.14-rc2.work/drivers/md/Makefile
--- linux-2.6.14-rc2/drivers/md/Makefile 2005-09-19 22:00:41.000000000 -0500
+++ linux-2.6.14-rc2.work/drivers/md/Makefile 2005-09-30 00:05:37.000000000 -0500
@@ -34,6 +34,7 @@ obj-$(CONFIG_BLK_DEV_DM) += dm-mod.o
obj-$(CONFIG_DM_CRYPT) += dm-crypt.o
obj-$(CONFIG_DM_MULTIPATH) += dm-multipath.o dm-round-robin.o
obj-$(CONFIG_DM_MULTIPATH_EMC) += dm-emc.o
+obj-$(CONFIG_DM_MULTIPATH_HP_SW) += dm-hp-sw.o
obj-$(CONFIG_DM_SNAPSHOT) += dm-snapshot.o
obj-$(CONFIG_DM_MIRROR) += dm-mirror.o
obj-$(CONFIG_DM_ZERO) += dm-zero.o
--
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
--
Robert Kenna / Red Hat
Sr Product Mgr - Storage
10 Technology Park Drive
Westford, MA 01886
o: (978) 392-2410 (x22410)
f: (978) 392-1001
c: (978) 771-6314
rkenna@xxxxxxxxxx
--
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