2 * Pioctl operations for Coda.
3 * Original version: (C) 1996 Peter Braam
4 * Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
6 * Carnegie Mellon encourages users of this code to contribute improvements
7 * to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/time.h>
14 #include <linux/stat.h>
15 #include <linux/errno.h>
16 #include <linux/string.h>
17 #include <linux/namei.h>
18 #include <linux/module.h>
19 #include <asm/uaccess.h>
21 #include <linux/coda.h>
22 #include <linux/coda_linux.h>
23 #include <linux/coda_fs_i.h>
24 #include <linux/coda_psdev.h>
26 #include <linux/smp_lock.h>
29 static int coda_ioctl_permission(struct inode *inode, int mask);
30 static long coda_pioctl(struct file *filp, unsigned int cmd,
31 unsigned long user_data);
33 /* exported from this file */
34 const struct inode_operations coda_ioctl_inode_operations = {
35 .permission = coda_ioctl_permission,
36 .setattr = coda_setattr,
39 const struct file_operations coda_ioctl_operations = {
41 .unlocked_ioctl = coda_pioctl,
44 /* the coda pioctl inode ops */
45 static int coda_ioctl_permission(struct inode *inode, int mask)
47 return (mask & MAY_EXEC) ? -EACCES : 0;
50 static long coda_pioctl(struct file *filp, unsigned int cmd,
51 unsigned long user_data)
55 struct PioctlData data;
56 struct inode *inode = filp->f_dentry->d_inode;
57 struct inode *target_inode = NULL;
58 struct coda_inode_info *cnp;
62 /* get the Pioctl data arguments from user space */
63 if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
69 * Look up the pathname. Note that the pathname is in
70 * user memory, and namei takes care of this
73 error = user_path(data.path, &path);
75 error = user_lpath(data.path, &path);
80 target_inode = path.dentry->d_inode;
82 /* return if it is not a Coda inode */
83 if (target_inode->i_sb != inode->i_sb) {
89 /* now proceed to make the upcall */
90 cnp = ITOC(target_inode);
92 error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);