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[AF_UNIX]: Use lookup_create().

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currently it opencodes it, but that's in the way of chaning the
lookup_hash interface.

I'd prefer to disallow modular af_unix over exporting lookup_create,
but I'll leave that to you.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2005-05-19 12:26:43 -07:00 committed by David S. Miller
parent 2fdba6b085
commit f81a0bffa1
2 changed files with 4 additions and 25 deletions
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1
fs/namei.c
View file

@ -1580,6 +1580,7 @@ struct dentry *lookup_create(struct nameidata *nd, int is_dir)
fail: fail:
return dentry; return dentry;
} }
EXPORT_SYMBOL_GPL(lookup_create);
int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
{ {

28
net/unix/af_unix.c
View file

@ -770,33 +770,12 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
err = path_lookup(sunaddr->sun_path, LOOKUP_PARENT, &nd); err = path_lookup(sunaddr->sun_path, LOOKUP_PARENT, &nd);
if (err) if (err)
goto out_mknod_parent; goto out_mknod_parent;
/*
* Yucky last component or no last component at all? dentry = lookup_create(&nd, 0);
* (foo/., foo/.., /////)
*/
err = -EEXIST;
if (nd.last_type != LAST_NORM)
goto out_mknod;
/*
* Lock the directory.
*/
down(&nd.dentry->d_inode->i_sem);
/*
* Do the final lookup.
*/
dentry = lookup_hash(&nd.last, nd.dentry);
err = PTR_ERR(dentry); err = PTR_ERR(dentry);
if (IS_ERR(dentry)) if (IS_ERR(dentry))
goto out_mknod_unlock; goto out_mknod_unlock;
err = -ENOENT;
/*
* Special case - lookup gave negative, but... we had foo/bar/
* From the vfs_mknod() POV we just have a negative dentry -
* all is fine. Let's be bastards - you had / on the end, you've
* been asking for (non-existent) directory. -ENOENT for you.
*/
if (nd.last.name[nd.last.len] && !dentry->d_inode)
goto out_mknod_dput;
/* /*
* All right, let's create it. * All right, let's create it.
*/ */
@ -845,7 +824,6 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
dput(dentry); dput(dentry);
out_mknod_unlock: out_mknod_unlock:
up(&nd.dentry->d_inode->i_sem); up(&nd.dentry->d_inode->i_sem);
out_mknod:
path_release(&nd); path_release(&nd);
out_mknod_parent: out_mknod_parent:
if (err==-EEXIST) if (err==-EEXIST)