1 files changed, 91 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_wrappers.h b/drivers/block/drbd/drbd_wrappers.h
new file mode 100644
index 000000000000..f93fa111ce50
--- /dev/null
+++ b/drivers/block/drbd/drbd_wrappers.h
@@ -0,0 +1,91 @@
+#ifndef _DRBD_WRAPPERS_H
+#define _DRBD_WRAPPERS_H
+
+#include <linux/ctype.h>
+#include <linux/mm.h>
+
+/* see get_sb_bdev and bd_claim */
+extern char *drbd_sec_holder;
+
+/* sets the number of 512 byte sectors of our virtual device */
+static inline void drbd_set_my_capacity(struct drbd_conf *mdev,
+                                        sector_t size)
+{
+        /* set_capacity(mdev->this_bdev->bd_disk, size); */
+        set_capacity(mdev->vdisk, size);
+        mdev->this_bdev->bd_inode->i_size = (loff_t)size << 9;
+}
+
+#define drbd_bio_uptodate(bio) bio_flagged(bio, BIO_UPTODATE)
+
+static inline int drbd_bio_has_active_page(struct bio *bio)
+{
+        struct bio_vec *bvec;
+        int i;
+
+        __bio_for_each_segment(bvec, bio, i, 0) {
+                if (page_count(bvec->bv_page) > 1)
+                        return 1;
+        }
+
+        return 0;
+}
+
+/* bi_end_io handlers */
+extern void drbd_md_io_complete(struct bio *bio, int error);
+extern void drbd_endio_read_sec(struct bio *bio, int error);
+extern void drbd_endio_write_sec(struct bio *bio, int error);
+extern void drbd_endio_pri(struct bio *bio, int error);
+
+/*
+ * used to submit our private bio
+ */
+static inline void drbd_generic_make_request(struct drbd_conf *mdev,
+                                             int fault_type, struct bio *bio)
+{
+        __release(local);
+        if (!bio->bi_bdev) {
+                printk(KERN_ERR "drbd%d: drbd_generic_make_request: "
+                                "bio->bi_bdev == NULL\n",
+                       mdev_to_minor(mdev));
+                dump_stack();
+                bio_endio(bio, -ENODEV);
+                return;
+        }
+
+        if (FAULT_ACTIVE(mdev, fault_type))
+                bio_endio(bio, -EIO);
+        else
+                generic_make_request(bio);
+}
+
+static inline void drbd_plug_device(struct drbd_conf *mdev)
+{
+        struct request_queue *q;
+        q = bdev_get_queue(mdev->this_bdev);
+
+        spin_lock_irq(q->queue_lock);
+
+/* XXX the check on !blk_queue_plugged is redundant,
+ * implicitly checked in blk_plug_device */
+
+        if (!blk_queue_plugged(q)) {
+                blk_plug_device(q);
+                del_timer(&q->unplug_timer);
+                /* unplugging should not happen automatically... */
+        }
+        spin_unlock_irq(q->queue_lock);
+}
+
+static inline int drbd_crypto_is_hash(struct crypto_tfm *tfm)
+{
+        return (crypto_tfm_alg_type(tfm) & CRYPTO_ALG_TYPE_HASH_MASK)
+                == CRYPTO_ALG_TYPE_HASH;
+}
+
+#ifndef __CHECKER__
+# undef __cond_lock
+# define __cond_lock(x,c) (c)
+#endif
+
+#endif