drivers/block/drbd/drbd_wrappers.h

   1 #ifndef _DRBD_WRAPPERS_H
   2 #define _DRBD_WRAPPERS_H
   3
   4 #include <linux/ctype.h>
   5 #include <linux/mm.h>
   6
   7 /* see get_sb_bdev and bd_claim */
   8 extern char *drbd_sec_holder;
   9
  10 /* sets the number of 512 byte sectors of our virtual device */
  11 static inline void drbd_set_my_capacity(struct drbd_conf *mdev,
  12                                         sector_t size)
  13 {
  14         /* set_capacity(mdev->this_bdev->bd_disk, size); */
  15         set_capacity(mdev->vdisk, size);
  16         mdev->this_bdev->bd_inode->i_size = (loff_t)size << 9;
  17 }
  18
  19 #define drbd_bio_uptodate(bio) bio_flagged(bio, BIO_UPTODATE)
  20
  21 /* bi_end_io handlers */
  22 extern void drbd_md_io_complete(struct bio *bio, int error);
  23 extern void drbd_endio_sec(struct bio *bio, int error);
  24 extern void drbd_endio_pri(struct bio *bio, int error);
  25
  26 /*
  27  * used to submit our private bio
  28  */
  29 static inline void drbd_generic_make_request(struct drbd_conf *mdev,
  30                                              int fault_type, struct bio *bio)
  31 {
  32         __release(local);
  33         if (!bio->bi_bdev) {
  34                 printk(KERN_ERR "drbd%d: drbd_generic_make_request: "
  35                                 "bio->bi_bdev == NULL\n",
  36                        mdev_to_minor(mdev));
  37                 dump_stack();
  38                 bio_endio(bio, -ENODEV);
  39                 return;
  40         }
  41
  42         if (FAULT_ACTIVE(mdev, fault_type))
  43                 bio_endio(bio, -EIO);
  44         else
  45                 generic_make_request(bio);
  46 }
  47
  48 static inline void drbd_plug_device(struct drbd_conf *mdev)
  49 {
  50         struct request_queue *q;
  51         q = bdev_get_queue(mdev->this_bdev);
  52
  53         spin_lock_irq(q->queue_lock);
  54
  55 /* XXX the check on !blk_queue_plugged is redundant,
  56  * implicitly checked in blk_plug_device */
  57
  58         if (!blk_queue_plugged(q)) {
  59                 blk_plug_device(q);
  60                 del_timer(&q->unplug_timer);
  61                 /* unplugging should not happen automatically... */
  62         }
  63         spin_unlock_irq(q->queue_lock);
  64 }
  65
  66 static inline int drbd_crypto_is_hash(struct crypto_tfm *tfm)
  67 {
  68         return (crypto_tfm_alg_type(tfm) & CRYPTO_ALG_TYPE_HASH_MASK)
  69                 == CRYPTO_ALG_TYPE_HASH;
  70 }
  71
  72 #ifndef __CHECKER__
  73 # undef __cond_lock
  74 # define __cond_lock(x,c) (c)
  75 #endif
  76
  77 #endif