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-rw-r--r--drivers/md/multipath.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/md/multipath.h b/drivers/md/multipath.h
new file mode 100644
index 000000000..717c60f62
--- /dev/null
+++ b/drivers/md/multipath.h
@@ -0,0 +1,31 @@
+#ifndef _MULTIPATH_H
+#define _MULTIPATH_H
+
+struct multipath_info {
+ struct md_rdev *rdev;
+};
+
+struct mpconf {
+ struct mddev *mddev;
+ struct multipath_info *multipaths;
+ int raid_disks;
+ spinlock_t device_lock;
+ struct list_head retry_list;
+
+ mempool_t *pool;
+};
+
+/*
+ * 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 {
+ struct mddev *mddev;
+ struct bio *master_bio;
+ struct bio bio;
+ int path;
+ struct list_head retry_list;
+};
+#endif