ACPI: throttling: fix build warning
[linux-2.6/mini2440.git] / fs / jfs / ioctl.c
blobdfda12a073e1985fb28b798df2e9088a9a996be4
1 /*
2 * linux/fs/jfs/ioctl.c
4 * Copyright (C) 2006 Herbert Poetzl
5 * adapted from Remy Card's ext2/ioctl.c
6 */
8 #include <linux/fs.h>
9 #include <linux/ctype.h>
10 #include <linux/capability.h>
11 #include <linux/time.h>
12 #include <linux/sched.h>
13 #include <asm/current.h>
14 #include <asm/uaccess.h>
16 #include "jfs_incore.h"
17 #include "jfs_dinode.h"
18 #include "jfs_inode.h"
21 static struct {
22 long jfs_flag;
23 long ext2_flag;
24 } jfs_map[] = {
25 {JFS_NOATIME_FL, FS_NOATIME_FL},
26 {JFS_DIRSYNC_FL, FS_DIRSYNC_FL},
27 {JFS_SYNC_FL, FS_SYNC_FL},
28 {JFS_SECRM_FL, FS_SECRM_FL},
29 {JFS_UNRM_FL, FS_UNRM_FL},
30 {JFS_APPEND_FL, FS_APPEND_FL},
31 {JFS_IMMUTABLE_FL, FS_IMMUTABLE_FL},
32 {0, 0},
35 static long jfs_map_ext2(unsigned long flags, int from)
37 int index=0;
38 long mapped=0;
40 while (jfs_map[index].jfs_flag) {
41 if (from) {
42 if (jfs_map[index].ext2_flag & flags)
43 mapped |= jfs_map[index].jfs_flag;
44 } else {
45 if (jfs_map[index].jfs_flag & flags)
46 mapped |= jfs_map[index].ext2_flag;
48 index++;
50 return mapped;
54 int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
55 unsigned long arg)
57 struct jfs_inode_info *jfs_inode = JFS_IP(inode);
58 unsigned int flags;
60 switch (cmd) {
61 case JFS_IOC_GETFLAGS:
62 jfs_get_inode_flags(jfs_inode);
63 flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
64 flags = jfs_map_ext2(flags, 0);
65 return put_user(flags, (int __user *) arg);
66 case JFS_IOC_SETFLAGS: {
67 unsigned int oldflags;
69 if (IS_RDONLY(inode))
70 return -EROFS;
72 if (!is_owner_or_cap(inode))
73 return -EACCES;
75 if (get_user(flags, (int __user *) arg))
76 return -EFAULT;
78 flags = jfs_map_ext2(flags, 1);
79 if (!S_ISDIR(inode->i_mode))
80 flags &= ~JFS_DIRSYNC_FL;
82 /* Is it quota file? Do not allow user to mess with it */
83 if (IS_NOQUOTA(inode))
84 return -EPERM;
85 jfs_get_inode_flags(jfs_inode);
86 oldflags = jfs_inode->mode2;
89 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
90 * the relevant capability.
92 if ((oldflags & JFS_IMMUTABLE_FL) ||
93 ((flags ^ oldflags) &
94 (JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
95 if (!capable(CAP_LINUX_IMMUTABLE))
96 return -EPERM;
99 flags = flags & JFS_FL_USER_MODIFIABLE;
100 flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
101 jfs_inode->mode2 = flags;
103 jfs_set_inode_flags(inode);
104 inode->i_ctime = CURRENT_TIME_SEC;
105 mark_inode_dirty(inode);
106 return 0;
108 default:
109 return -ENOTTY;