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authorChristoph Hellwig <hch@lst.de>2009-03-31 14:27:03 +1100
committerNeilBrown <neilb@suse.de>2009-03-31 14:27:03 +1100
commitef740c372dfd80e706dbf955d4e4aedda6c0c148 (patch)
tree8d9ef9db346ee1ba319a125c9de83cdde049510d /drivers/md/multipath.h
parent2a40a8aed083d988df6822bb9b1b08fb7ce21e1d (diff)
downloadvexpress-lsk-ef740c372dfd80e706dbf955d4e4aedda6c0c148.tar.gz
md: move headers out of include/linux/raid/
Move the headers with the local structures for the disciplines and bitmap.h into drivers/md/ so that they are more easily grepable for hacking and not far away. md.h is left where it is for now as there are some uses from the outside. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/multipath.h')
-rw-r--r--drivers/md/multipath.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/md/multipath.h b/drivers/md/multipath.h
new file mode 100644
index 00000000000..6f53fc177a4
--- /dev/null
+++ b/drivers/md/multipath.h
@@ -0,0 +1,42 @@
+#ifndef _MULTIPATH_H
+#define _MULTIPATH_H
+
+#include <linux/raid/md.h>
+
+struct multipath_info {
+ mdk_rdev_t *rdev;
+};
+
+struct multipath_private_data {
+ mddev_t *mddev;
+ struct multipath_info *multipaths;
+ int raid_disks;
+ int working_disks;
+ spinlock_t device_lock;
+ struct list_head retry_list;
+
+ mempool_t *pool;
+};
+
+typedef struct multipath_private_data multipath_conf_t;
+
+/*
+ * this is the only point in the RAID code where we violate
+ * C type safety. mddev->private is an 'opaque' pointer.
+ */
+#define mddev_to_conf(mddev) ((multipath_conf_t *) mddev->private)
+
+/*
+ * this is our 'private' 'collective' MULTIPATH buffer head.
+ * it contains information about what kind of IO operations were started
+ * for this MULTIPATH operation, and about their status:
+ */
+
+struct multipath_bh {
+ mddev_t *mddev;
+ struct bio *master_bio;
+ struct bio bio;
+ int path;
+ struct list_head retry_list;
+};
+#endif