From: Edward Goggin <egoggin@xxxxxxx>
Make the mapped device structure accessible to hardware
handlers so error messages can include the device name.
Signed-off-by: Edward Goggin <egoggin@xxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
---
drivers/md/dm-hw-handler.h | 1 +
drivers/md/dm-mpath.c | 3 +++
drivers/md/dm.c | 1 +
3 files changed, 5 insertions(+)
Index: linux-2.6.21/drivers/md/dm-hw-handler.h
===================================================================
--- linux-2.6.21.orig/drivers/md/dm-hw-handler.h 2007-05-01 17:38:32.000000000 +0100
+++ linux-2.6.21/drivers/md/dm-hw-handler.h 2007-05-01 17:40:50.000000000 +0100
@@ -16,6 +16,7 @@
struct hw_handler_type;
struct hw_handler {
struct hw_handler_type *type;
+ struct mapped_device *md;
void *context;
};
Index: linux-2.6.21/drivers/md/dm-mpath.c
===================================================================
--- linux-2.6.21.orig/drivers/md/dm-mpath.c 2007-05-01 17:38:32.000000000 +0100
+++ linux-2.6.21/drivers/md/dm-mpath.c 2007-05-01 17:40:50.000000000 +0100
@@ -668,6 +668,9 @@ static int parse_hw_handler(struct arg_s
return -EINVAL;
}
+ m->hw_handler.md = dm_table_get_md(ti->table);
+ dm_put(m->hw_handler.md);
+
r = hwht->create(&m->hw_handler, hw_argc - 1, as->argv);
if (r) {
dm_put_hw_handler(hwht);
Index: linux-2.6.21/drivers/md/dm.c
===================================================================
--- linux-2.6.21.orig/drivers/md/dm.c 2007-05-01 17:38:32.000000000 +0100
+++ linux-2.6.21/drivers/md/dm.c 2007-05-01 17:40:50.000000000 +0100
@@ -1236,6 +1236,7 @@ void dm_put(struct mapped_device *md)
free_dev(md);
}
}
+EXPORT_SYMBOL_GPL(dm_put);
/*
* Process the deferred bios
--
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