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vfs: clean up vfs_rename_dir

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Simplify control flow through vfs_rename_dir.

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Sage Weil 2011-05-24 13:06:12 -07:00 committed by Al Viro
parent 912dbc15d9
commit 9055cba711
1 changed files with 15 additions and 11 deletions
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26
fs/namei.c
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@ -2963,7 +2963,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
int error = 0;
struct inode *target;
struct inode *target = new_dentry->d_inode;
/*
* If we are going to change the parent - check write permissions,
@ -2979,20 +2979,24 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
if (error)
return error;
target = new_dentry->d_inode;
if (target)
mutex_lock(&target->i_mutex);
if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
error = -EBUSY;
else
error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
error = -EBUSY;
if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry))
goto out;
error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
if (error)
goto out;
if (target) {
if (!error) {
target->i_flags |= S_DEAD;
dont_mount(new_dentry);
}
mutex_unlock(&target->i_mutex);
target->i_flags |= S_DEAD;
dont_mount(new_dentry);
}
out:
if (target)
mutex_unlock(&target->i_mutex);
if (!error)
if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
d_move(old_dentry,new_dentry);