mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 20:56:23 +00:00
1d957f9bf8
* Add path_put() functions for releasing a reference to the dentry and vfsmount of a struct path in the right order * Switch from path_release(nd) to path_put(&nd->path) * Rename dput_path() to path_put_conditional() [akpm@linux-foundation.org: fix cifs] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: <linux-fsdevel@vger.kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
|
|
* Pioctl operations for Coda.
|
|
* Original version: (C) 1996 Peter Braam
|
|
* Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
|
|
*
|
|
* Carnegie Mellon encourages users of this code to contribute improvements
|
|
* to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/time.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/module.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <linux/coda.h>
|
|
#include <linux/coda_linux.h>
|
|
#include <linux/coda_fs_i.h>
|
|
#include <linux/coda_psdev.h>
|
|
|
|
/* pioctl ops */
|
|
static int coda_ioctl_permission(struct inode *inode, int mask,
|
|
struct nameidata *nd);
|
|
static int coda_pioctl(struct inode * inode, struct file * filp,
|
|
unsigned int cmd, unsigned long user_data);
|
|
|
|
/* exported from this file */
|
|
const struct inode_operations coda_ioctl_inode_operations =
|
|
{
|
|
.permission = coda_ioctl_permission,
|
|
.setattr = coda_setattr,
|
|
};
|
|
|
|
const struct file_operations coda_ioctl_operations = {
|
|
.owner = THIS_MODULE,
|
|
.ioctl = coda_pioctl,
|
|
};
|
|
|
|
/* the coda pioctl inode ops */
|
|
static int coda_ioctl_permission(struct inode *inode, int mask,
|
|
struct nameidata *nd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int coda_pioctl(struct inode * inode, struct file * filp,
|
|
unsigned int cmd, unsigned long user_data)
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
struct PioctlData data;
|
|
struct inode *target_inode = NULL;
|
|
struct coda_inode_info *cnp;
|
|
|
|
/* get the Pioctl data arguments from user space */
|
|
if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Look up the pathname. Note that the pathname is in
|
|
* user memory, and namei takes care of this
|
|
*/
|
|
if ( data.follow ) {
|
|
error = user_path_walk(data.path, &nd);
|
|
} else {
|
|
error = user_path_walk_link(data.path, &nd);
|
|
}
|
|
|
|
if ( error ) {
|
|
return error;
|
|
} else {
|
|
target_inode = nd.path.dentry->d_inode;
|
|
}
|
|
|
|
/* return if it is not a Coda inode */
|
|
if ( target_inode->i_sb != inode->i_sb ) {
|
|
path_put(&nd.path);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* now proceed to make the upcall */
|
|
cnp = ITOC(target_inode);
|
|
|
|
error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
|
|
|
|
path_put(&nd.path);
|
|
return error;
|
|
}
|
|
|