FRV: Use generic show_interrupts()
[cris-mirror.git] / fs / coda / pioctl.c
blob6cbb3afb36dc2b28b9aa3f2b585c195330894699
1 /*
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>.
8 */
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/time.h>
13 #include <linux/fs.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_psdev.h>
24 #include "coda_linux.h"
26 /* pioctl ops */
27 static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags);
28 static long coda_pioctl(struct file *filp, unsigned int cmd,
29 unsigned long user_data);
31 /* exported from this file */
32 const struct inode_operations coda_ioctl_inode_operations = {
33 .permission = coda_ioctl_permission,
34 .setattr = coda_setattr,
37 const struct file_operations coda_ioctl_operations = {
38 .owner = THIS_MODULE,
39 .unlocked_ioctl = coda_pioctl,
40 .llseek = noop_llseek,
43 /* the coda pioctl inode ops */
44 static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags)
46 if (flags & IPERM_FLAG_RCU)
47 return -ECHILD;
48 return (mask & MAY_EXEC) ? -EACCES : 0;
51 static long coda_pioctl(struct file *filp, unsigned int cmd,
52 unsigned long user_data)
54 struct path path;
55 int error;
56 struct PioctlData data;
57 struct inode *inode = filp->f_dentry->d_inode;
58 struct inode *target_inode = NULL;
59 struct coda_inode_info *cnp;
61 /* get the Pioctl data arguments from user space */
62 if (copy_from_user(&data, (void __user *)user_data, sizeof(data)))
63 return -EINVAL;
66 * Look up the pathname. Note that the pathname is in
67 * user memory, and namei takes care of this
69 if (data.follow)
70 error = user_path(data.path, &path);
71 else
72 error = user_lpath(data.path, &path);
74 if (error)
75 return error;
77 target_inode = path.dentry->d_inode;
79 /* return if it is not a Coda inode */
80 if (target_inode->i_sb != inode->i_sb) {
81 error = -EINVAL;
82 goto out;
85 /* now proceed to make the upcall */
86 cnp = ITOC(target_inode);
88 error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
89 out:
90 path_put(&path);
91 return error;