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Commit e56b6a5d authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Al Viro
Browse files

Re: [PATCH 3/6] vfs: open_exec cleanup 



On Mon, May 19, 2008 at 12:01:49AM +0200, Marcin Slusarz wrote:
> open_exec is needlessly indented, calls ERR_PTR with 0 argument
> (which is not valid errno) and jumps into middle of function
> just to return value.
> So clean it up a bit.

Still looks rather messy.  See below for a better version.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent beb29e05

fs/exec.c

+30 −28
Original line number Diff line number Diff line
@@ -656,38 +656,40 @@ EXPORT_SYMBOL(setup_arg_pages); 
struct file *open_exec(const char *name)

{

	struct nameidata nd;

	int err;

	struct file *file;

	int err;



	err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd,

				FMODE_READ|FMODE_EXEC);

	if (err)

		goto out;



	err = -EACCES;

	if (!S_ISREG(nd.path.dentry->d_inode->i_mode))

		goto out_path_put;



	err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);

	if (err)

		goto out_path_put;



	file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);

	if (IS_ERR(file))

		return file;



	err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);

	file = ERR_PTR(err);



	if (!err) {

		struct inode *inode = nd.path.dentry->d_inode;

		file = ERR_PTR(-EACCES);

		if (S_ISREG(inode->i_mode)) {

			int err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);

			file = ERR_PTR(err);

			if (!err) {

				file = nameidata_to_filp(&nd,

							O_RDONLY|O_LARGEFILE);

				if (!IS_ERR(file)) {

	err = deny_write_access(file);

	if (err) {

		fput(file);

						file = ERR_PTR(err);

					}

		goto out;

	}

out:



	return file;

			}

		}



 out_path_put:

	release_open_intent(&nd);

	path_put(&nd.path);

 out:

	return ERR_PTR(err);

}

	goto out;

}



EXPORT_SYMBOL(open_exec);



int kernel_read(struct file *file, unsigned long offset,