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Btrfs: remove device tree

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-06-09 09:22:25 -04:00
committed by David Woodhouse
parent ad693af684
commit 0cf6c62017
4 changed files with 10 additions and 413 deletions
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88
fs/btrfs/super.c
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@@ -2566,83 +2566,6 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen)
return 0;
}
static int add_disk(struct btrfs_root *root, char *name, int namelen)
{
struct block_device *bdev;
struct btrfs_path *path;
struct super_block *sb = root->fs_info->sb;
struct btrfs_root *dev_root = root->fs_info->dev_root;
struct btrfs_trans_handle *trans;
struct btrfs_device_item *dev_item;
struct btrfs_key key;
u16 item_size;
u64 num_blocks;
u64 new_blocks;
u64 device_id;
int ret;
printk("adding disk %s\n", name);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
num_blocks = btrfs_super_total_blocks(root->fs_info->disk_super);
bdev = open_bdev_excl(name, O_RDWR, sb);
if (IS_ERR(bdev)) {
ret = PTR_ERR(bdev);
printk("open bdev excl failed ret %d\n", ret);
goto out_nolock;
}
set_blocksize(bdev, sb->s_blocksize);
new_blocks = bdev->bd_inode->i_size >> sb->s_blocksize_bits;
key.objectid = num_blocks;
key.offset = new_blocks;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DEV_ITEM_KEY);
mutex_lock(&dev_root->fs_info->fs_mutex);
trans = btrfs_start_transaction(dev_root, 1);
item_size = sizeof(*dev_item) + namelen;
printk("insert empty on %Lu %Lu %u size %d\n", num_blocks, new_blocks, key.flags, item_size);
ret = btrfs_insert_empty_item(trans, dev_root, path, &key, item_size);
if (ret) {
printk("insert failed %d\n", ret);
close_bdev_excl(bdev);
if (ret > 0)
ret = -EEXIST;
goto out;
}
dev_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
path->slots[0], struct btrfs_device_item);
btrfs_set_device_pathlen(dev_item, namelen);
memcpy(dev_item + 1, name, namelen);
device_id = btrfs_super_last_device_id(root->fs_info->disk_super) + 1;
btrfs_set_super_last_device_id(root->fs_info->disk_super, device_id);
btrfs_set_device_id(dev_item, device_id);
mark_buffer_dirty(path->nodes[0]);
ret = btrfs_insert_dev_radix(root, bdev, device_id, num_blocks,
new_blocks);
if (!ret) {
btrfs_set_super_total_blocks(root->fs_info->disk_super,
num_blocks + new_blocks);
i_size_write(root->fs_info->btree_inode,
(num_blocks + new_blocks) <<
root->fs_info->btree_inode->i_blkbits);
}
out:
ret = btrfs_commit_transaction(trans, dev_root);
BUG_ON(ret);
mutex_unlock(&root->fs_info->fs_mutex);
out_nolock:
btrfs_free_path(path);
btrfs_btree_balance_dirty(root);
return ret;
}
static int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
cmd, unsigned long arg)
{
@@ -2682,17 +2605,6 @@ static int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int
ret = create_snapshot(root, vol_args.name, namelen);
WARN_ON(ret);
break;
case BTRFS_IOC_ADD_DISK:
if (copy_from_user(&vol_args,
(struct btrfs_ioctl_vol_args __user *)arg,
sizeof(vol_args)))
return -EFAULT;
namelen = strlen(vol_args.name);
if (namelen > BTRFS_VOL_NAME_MAX)
return -EINVAL;
vol_args.name[namelen] = '\0';
ret = add_disk(root, vol_args.name, namelen);
break;
default:
return -ENOTTY;
}