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
);