Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 98 insertions, 0 deletions

diff --git a/include/linux/raid/raid1.h b/include/linux/raid/raid1.h
new file mode 100644
index 000000000000..abbfdd9afe1e
--- /dev/null
+++ b/include/linux/raid/raid1.h
@@ -0,0 +1,98 @@
+#ifndef _RAID1_H
+#define _RAID1_H
+
+#include <linux/raid/md.h>
+
+typedef struct mirror_info mirror_info_t;
+
+struct mirror_info {
+        mdk_rdev_t      *rdev;
+        sector_t        head_position;
+};
+
+/*
+ * memory pools need a pointer to the mddev, so they can force an unplug
+ * when memory is tight, and a count of the number of drives that the
+ * pool was allocated for, so they know how much to allocate and free.
+ * mddev->raid_disks cannot be used, as it can change while a pool is active
+ * These two datums are stored in a kmalloced struct.
+ */
+
+struct pool_info {
+        mddev_t *mddev;
+        int     raid_disks;
+};
+
+
+typedef struct r1bio_s r1bio_t;
+
+struct r1_private_data_s {
+        mddev_t                 *mddev;
+        mirror_info_t           *mirrors;
+        int                     raid_disks;
+        int                     working_disks;
+        int                     last_used;
+        sector_t                next_seq_sect;
+        spinlock_t              device_lock;
+
+        struct list_head        retry_list;
+        /* for use when syncing mirrors: */
+
+        spinlock_t              resync_lock;
+        int nr_pending;
+        int barrier;
+        sector_t                next_resync;
+
+        wait_queue_head_t       wait_idle;
+        wait_queue_head_t       wait_resume;
+
+        struct pool_info        *poolinfo;
+
+        mempool_t *r1bio_pool;
+        mempool_t *r1buf_pool;
+};
+
+typedef struct r1_private_data_s 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) ((conf_t *) mddev->private)
+
+/*
+ * this is our 'private' RAID1 bio.
+ *
+ * it contains information about what kind of IO operations were started
+ * for this RAID1 operation, and about their status:
+ */
+
+struct r1bio_s {
+        atomic_t                remaining; /* 'have we finished' count,
+                                            * used from IRQ handlers
+                                            */
+        sector_t                sector;
+        int                     sectors;
+        unsigned long           state;
+        mddev_t                 *mddev;
+        /*
+         * original bio going to /dev/mdx
+         */
+        struct bio              *master_bio;
+        /*
+         * if the IO is in READ direction, then this is where we read
+         */
+        int                     read_disk;
+
+        struct list_head        retry_list;
+        /*
+         * if the IO is in WRITE direction, then multiple bios are used.
+         * We choose the number when they are allocated.
+         */
+        struct bio              *bios[0];
+};
+
+/* bits for r1bio.state */
+#define R1BIO_Uptodate  0
+#define R1BIO_IsSync    1
+#endif