Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev

[linux-2.6-omap-h63xx.git] / drivers / md / dm.c

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 327de03a5bdfed7f11b0904abb72f3eac65fc92d..6963ad1484082bf5d0f8009c60aa1db18eb980c1 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -21,7 +21,6 @@
 #include <linux/idr.h>
 #include <linux/hdreg.h>
 #include <linux/blktrace_api.h>
-#include <linux/smp_lock.h>
 
 #define DM_MSG_PREFIX "core"
 
@@ -76,7 +75,6 @@ union map_info *dm_get_mapinfo(struct bio *bio)
  */
 struct dm_wq_req {
        enum {
-               DM_WQ_FLUSH_ALL,
                DM_WQ_FLUSH_DEFERRED,
        } type;
        struct work_struct work;
@@ -151,40 +149,40 @@ static struct kmem_cache *_tio_cache;
 
 static int __init local_init(void)
 {
-       int r;
+       int r = -ENOMEM;
 
        /* allocate a slab for the dm_ios */
        _io_cache = KMEM_CACHE(dm_io, 0);
        if (!_io_cache)
-               return -ENOMEM;
+               return r;
 
        /* allocate a slab for the target ios */
        _tio_cache = KMEM_CACHE(dm_target_io, 0);
-       if (!_tio_cache) {
-               kmem_cache_destroy(_io_cache);
-               return -ENOMEM;
-       }
+       if (!_tio_cache)
+               goto out_free_io_cache;
 
        r = dm_uevent_init();
-       if (r) {
-               kmem_cache_destroy(_tio_cache);
-               kmem_cache_destroy(_io_cache);
-               return r;
-       }
+       if (r)
+               goto out_free_tio_cache;
 
        _major = major;
        r = register_blkdev(_major, _name);
-       if (r < 0) {
-               kmem_cache_destroy(_tio_cache);
-               kmem_cache_destroy(_io_cache);
-               dm_uevent_exit();
-               return r;
-       }
+       if (r < 0)
+               goto out_uevent_exit;
 
        if (!_major)
                _major = r;
 
        return 0;
+
+out_uevent_exit:
+       dm_uevent_exit();
+out_free_tio_cache:
+       kmem_cache_destroy(_tio_cache);
+out_free_io_cache:
+       kmem_cache_destroy(_io_cache);
+
+       return r;
 }
 
 static void local_exit(void)
@@ -249,13 +247,13 @@ static void __exit dm_exit(void)
 /*
  * Block device functions
  */
-static int dm_blk_open(struct inode *inode, struct file *file)
+static int dm_blk_open(struct block_device *bdev, fmode_t mode)
 {
        struct mapped_device *md;
 
        spin_lock(&_minor_lock);
 
-       md = inode->i_bdev->bd_disk->private_data;
+       md = bdev->bd_disk->private_data;
        if (!md)
                goto out;
 
@@ -274,11 +272,9 @@ out:
        return md ? 0 : -ENXIO;
 }
 
-static int dm_blk_close(struct inode *inode, struct file *file)
+static int dm_blk_close(struct gendisk *disk, fmode_t mode)
 {
-       struct mapped_device *md;
-
-       md = inode->i_bdev->bd_disk->private_data;
+       struct mapped_device *md = disk->private_data;
        atomic_dec(&md->open_count);
        dm_put(md);
        return 0;
@@ -315,21 +311,14 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
        return dm_get_geometry(md, geo);
 }
 
-static int dm_blk_ioctl(struct inode *inode, struct file *file,
+static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode,
                        unsigned int cmd, unsigned long arg)
 {
-       struct mapped_device *md;
-       struct dm_table *map;
+       struct mapped_device *md = bdev->bd_disk->private_data;
+       struct dm_table *map = dm_get_table(md);
        struct dm_target *tgt;
        int r = -ENOTTY;
 
-       /* We don't really need this lock, but we do need 'inode'. */
-       unlock_kernel();
-
-       md = inode->i_bdev->bd_disk->private_data;
-
-       map = dm_get_table(md);
-
        if (!map || !dm_table_get_size(map))
                goto out;
 
@@ -345,12 +334,11 @@ static int dm_blk_ioctl(struct inode *inode, struct file *file,
        }
 
        if (tgt->type->ioctl)
-               r = tgt->type->ioctl(tgt, inode, file, cmd, arg);
+               r = tgt->type->ioctl(tgt, cmd, arg);
 
 out:
        dm_table_put(map);
 
-       lock_kernel();
        return r;
 }
 
@@ -669,6 +657,7 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector,
        clone->bi_size = to_bytes(len);
        clone->bi_io_vec->bv_offset = offset;
        clone->bi_io_vec->bv_len = clone->bi_size;
+       clone->bi_flags |= 1 << BIO_CLONED;
 
        return clone;
 }
@@ -1394,9 +1383,6 @@ static void dm_wq_work(struct work_struct *work)
 
        down_write(&md->io_lock);
        switch (req->type) {
-       case DM_WQ_FLUSH_ALL:
-               __merge_pushback_list(md);
-               /* pass through */
        case DM_WQ_FLUSH_DEFERRED:
                __flush_deferred_io(md);
                break;
@@ -1526,7 +1512,7 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags)
                if (!md->suspended_bdev) {
                        DMWARN("bdget failed in dm_suspend");
                        r = -ENOMEM;
-                       goto flush_and_out;
+                       goto out;
                }
 
                /*
@@ -1577,14 +1563,6 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags)
 
        set_bit(DMF_SUSPENDED, &md->flags);
 
-flush_and_out:
-       if (r && noflush)
-               /*
-                * Because there may be already I/Os in the pushback list,
-                * flush them before return.
-                */
-               dm_queue_flush(md, DM_WQ_FLUSH_ALL, NULL);
-
 out:
        if (r && md->suspended_bdev) {
                bdput(md->suspended_bdev);