}
#if 0
-static int blk_end_aio(struct bio *bio, unsigned int bytes_done, int error)
+static void blk_end_aio(struct bio *bio, int error)
{
struct kiocb *iocb = bio->bi_private;
atomic_t *bio_count = &iocb->ki_bio_count;
return block_read_full_page(page, blkdev_get_block);
}
-static int blkdev_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+static int blkdev_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- return block_prepare_write(page, from, to, blkdev_get_block);
+ *pagep = NULL;
+ return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ blkdev_get_block);
}
-static int blkdev_commit_write(struct file *file, struct page *page, unsigned from, unsigned to)
+static int blkdev_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
{
- return block_commit_write(page, from, to);
+ int ret;
+ ret = block_write_end(file, mapping, pos, len, copied, page, fsdata);
+
+ unlock_page(page);
+ page_cache_release(page);
+
+ return ret;
}
/*
kmem_cache_free(bdev_cachep, bdi);
}
-static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
+static void init_once(struct kmem_cache * cachep, void *foo)
{
struct bdev_inode *ei = (struct bdev_inode *) foo;
struct block_device *bdev = &ei->bdev;
- if (flags & SLAB_CTOR_CONSTRUCTOR) {
- memset(bdev, 0, sizeof(*bdev));
- mutex_init(&bdev->bd_mutex);
- sema_init(&bdev->bd_mount_sem, 1);
- INIT_LIST_HEAD(&bdev->bd_inodes);
- INIT_LIST_HEAD(&bdev->bd_list);
+ memset(bdev, 0, sizeof(*bdev));
+ mutex_init(&bdev->bd_mutex);
+ sema_init(&bdev->bd_mount_sem, 1);
+ INIT_LIST_HEAD(&bdev->bd_inodes);
+ INIT_LIST_HEAD(&bdev->bd_list);
#ifdef CONFIG_SYSFS
- INIT_LIST_HEAD(&bdev->bd_holder_list);
+ INIT_LIST_HEAD(&bdev->bd_holder_list);
#endif
- inode_init_once(&ei->vfs_inode);
- }
+ inode_init_once(&ei->vfs_inode);
}
static inline void __bd_forget(struct inode *inode)
bdev_cachep = kmem_cache_create("bdev_cache", sizeof(struct bdev_inode),
0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD|SLAB_PANIC),
- init_once, NULL);
+ init_once);
err = register_filesystem(&bd_type);
if (err)
panic("Cannot register bdev pseudo-fs");
long nr_blockdev_pages(void)
{
- struct list_head *p;
+ struct block_device *bdev;
long ret = 0;
spin_lock(&bdev_lock);
- list_for_each(p, &all_bdevs) {
- struct block_device *bdev;
- bdev = list_entry(p, struct block_device, bd_list);
+ list_for_each_entry(bdev, &all_bdevs, bd_list) {
ret += bdev->bd_inode->i_mapping->nrpages;
}
spin_unlock(&bdev_lock);
static struct kobject *bdev_get_kobj(struct block_device *bdev)
{
if (bdev->bd_contains != bdev)
- return kobject_get(&bdev->bd_part->kobj);
+ return kobject_get(&bdev->bd_part->dev.kobj);
else
- return kobject_get(&bdev->bd_disk->kobj);
+ return kobject_get(&bdev->bd_disk->dev.kobj);
}
static struct kobject *bdev_get_holder(struct block_device *bdev)
*/
static int add_bd_holder(struct block_device *bdev, struct bd_holder *bo)
{
- int ret;
+ int err;
if (!bo)
return -EINVAL;
if (!bd_holder_grab_dirs(bdev, bo))
return -EBUSY;
- ret = add_symlink(bo->sdir, bo->sdev);
- if (ret == 0) {
- ret = add_symlink(bo->hdir, bo->hdev);
- if (ret)
- del_symlink(bo->sdir, bo->sdev);
+ err = add_symlink(bo->sdir, bo->sdev);
+ if (err)
+ return err;
+
+ err = add_symlink(bo->hdir, bo->hdev);
+ if (err) {
+ del_symlink(bo->sdir, bo->sdev);
+ return err;
}
- if (ret == 0)
- list_add_tail(&bo->list, &bdev->bd_holder_list);
- return ret;
+
+ list_add_tail(&bo->list, &bdev->bd_holder_list);
+ return 0;
}
/**
static int bd_claim_by_kobject(struct block_device *bdev, void *holder,
struct kobject *kobj)
{
- int res;
+ int err;
struct bd_holder *bo, *found;
if (!kobj)
return -ENOMEM;
mutex_lock(&bdev->bd_mutex);
- res = bd_claim(bdev, holder);
- if (res == 0) {
- found = find_bd_holder(bdev, bo);
- if (found == NULL) {
- res = add_bd_holder(bdev, bo);
- if (res)
- bd_release(bdev);
- }
- }
- if (res || found)
- free_bd_holder(bo);
- mutex_unlock(&bdev->bd_mutex);
+ err = bd_claim(bdev, holder);
+ if (err)
+ goto fail;
- return res;
+ found = find_bd_holder(bdev, bo);
+ if (found)
+ goto fail;
+
+ err = add_bd_holder(bdev, bo);
+ if (err)
+ bd_release(bdev);
+ else
+ bo = NULL;
+fail:
+ mutex_unlock(&bdev->bd_mutex);
+ free_bd_holder(bo);
+ return err;
}
/**
static void bd_release_from_kobject(struct block_device *bdev,
struct kobject *kobj)
{
- struct bd_holder *bo;
-
if (!kobj)
return;
mutex_lock(&bdev->bd_mutex);
bd_release(bdev);
- if ((bo = del_bd_holder(bdev, kobj)))
- free_bd_holder(bo);
+ free_bd_holder(del_bd_holder(bdev, kobj));
mutex_unlock(&bdev->bd_mutex);
}
ret = -ENXIO;
goto out_first;
}
- kobject_get(&p->kobj);
+ kobject_get(&p->dev.kobj);
bdev->bd_part = p;
bd_set_size(bdev, (loff_t) p->nr_sects << 9);
}
module_put(owner);
if (bdev->bd_contains != bdev) {
- kobject_put(&bdev->bd_part->kobj);
+ kobject_put(&bdev->bd_part->dev.kobj);
bdev->bd_part = NULL;
}
bdev->bd_disk = NULL;
.readpage = blkdev_readpage,
.writepage = blkdev_writepage,
.sync_page = block_sync_page,
- .prepare_write = blkdev_prepare_write,
- .commit_write = blkdev_commit_write,
+ .write_begin = blkdev_write_begin,
+ .write_end = blkdev_write_end,
.writepages = generic_writepages,
.direct_IO = blkdev_direct_IO,
};
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_blkdev_ioctl,
#endif
- .sendfile = generic_file_sendfile,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
};