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Btrfs: Add new ioctl to add devices

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-04-28 15:29:42 -04:00
parent 8e7bf94fd5
commit 788f20eb5a
6 changed files with 108 additions and 0 deletions
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23
fs/btrfs/inode.c
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@@ -3070,6 +3070,27 @@ static int btrfs_ioctl_defrag(struct file *file)
return 0;
}
long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
{
struct btrfs_ioctl_vol_args *vol_args;
int ret;
vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS);
if (!vol_args)
return -ENOMEM;
if (copy_from_user(vol_args, arg, sizeof(*vol_args))) {
ret = -EFAULT;
goto out;
}
ret = btrfs_init_new_device(root, vol_args->name);
out:
kfree(vol_args);
return ret;
}
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
@@ -3082,6 +3103,8 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_defrag(file);
case BTRFS_IOC_RESIZE:
return btrfs_ioctl_resize(root, (void __user *)arg);
case BTRFS_IOC_ADD_DEV:
return btrfs_ioctl_add_dev(root, (void __user *)arg);
}
return -ENOTTY;