Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes
[sfrench/cifs-2.6.git] / 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