split up btrfs_ioctl
Add a helper per ioctl function to make the code more readable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3901a7f..e24b875 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1957,65 +1957,77 @@
return 0;
}
-long btrfs_ioctl(struct file *file, unsigned int
- cmd, unsigned long arg)
+static int btrfs_ioctl_snap_create(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_vol_args vol_args;
+ struct btrfs_dir_item *di;
+ struct btrfs_path *path;
+ int namelen;
+ u64 root_dirid;
+
+ if (copy_from_user(&vol_args, arg, sizeof(vol_args)))
+ return -EFAULT;
+
+ namelen = strlen(vol_args.name);
+ if (namelen > BTRFS_VOL_NAME_MAX)
+ return -EINVAL;
+ if (strchr(vol_args.name, '/'))
+ return -EINVAL;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
+ mutex_lock(&root->fs_info->fs_mutex);
+ di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
+ path, root_dirid,
+ vol_args.name, namelen, 0);
+ mutex_unlock(&root->fs_info->fs_mutex);
+ btrfs_free_path(path);
+ if (di && !IS_ERR(di))
+ return -EEXIST;
+ if (IS_ERR(di))
+ return PTR_ERR(di);
+
+ if (root == root->fs_info->tree_root)
+ return create_subvol(root, vol_args.name, namelen);
+ return create_snapshot(root, vol_args.name, namelen);
+}
+
+static int btrfs_ioctl_defrag(struct file *file)
{
struct inode *inode = file->f_path.dentry->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_ioctl_vol_args vol_args;
- int ret = 0;
- struct btrfs_dir_item *di;
- int namelen;
- struct btrfs_path *path;
- u64 root_dirid;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFDIR:
+ mutex_lock(&root->fs_info->fs_mutex);
+ btrfs_defrag_root(root, 0);
+ btrfs_defrag_root(root->fs_info->extent_root, 0);
+ mutex_unlock(&root->fs_info->fs_mutex);
+ break;
+ case S_IFREG:
+ btrfs_defrag_file(file);
+ break;
+ }
+
+ return 0;
+}
+
+long btrfs_ioctl(struct file *file, unsigned int
+ cmd, unsigned long arg)
+{
+ struct btrfs_root *root = BTRFS_I(file->f_path.dentry->d_inode)->root;
switch (cmd) {
case BTRFS_IOC_SNAP_CREATE:
- 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;
- if (strchr(vol_args.name, '/'))
- return -EINVAL;
- path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
- root_dirid = root->fs_info->sb->s_root->d_inode->i_ino,
- mutex_lock(&root->fs_info->fs_mutex);
- di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root,
- path, root_dirid,
- vol_args.name, namelen, 0);
- mutex_unlock(&root->fs_info->fs_mutex);
- btrfs_free_path(path);
- if (di && !IS_ERR(di))
- return -EEXIST;
- if (IS_ERR(di))
- return PTR_ERR(di);
-
- if (root == root->fs_info->tree_root)
- ret = create_subvol(root, vol_args.name, namelen);
- else
- ret = create_snapshot(root, vol_args.name, namelen);
- break;
-
+ return btrfs_ioctl_snap_create(root, (void __user *)arg);
case BTRFS_IOC_DEFRAG:
- if (S_ISDIR(inode->i_mode)) {
- mutex_lock(&root->fs_info->fs_mutex);
- btrfs_defrag_root(root, 0);
- btrfs_defrag_root(root->fs_info->extent_root, 0);
- mutex_unlock(&root->fs_info->fs_mutex);
- } else if (S_ISREG(inode->i_mode)) {
- btrfs_defrag_file(file);
- }
- ret = 0;
- break;
- default:
- return -ENOTTY;
+ return btrfs_ioctl_defrag(file);
}
- return ret;
+
+ return -ENOTTY;
}
/*