Commit | Line | Data |
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d9e90266 HP |
1 | /* |
2 | * linux/fs/jfs/ioctl.c | |
3 | * | |
4 | * Copyright (C) 2006 Herbert Poetzl | |
5 | * adapted from Remy Card's ext2/ioctl.c | |
6 | */ | |
7 | ||
8 | #include <linux/fs.h> | |
9 | #include <linux/ext2_fs.h> | |
10 | #include <linux/ctype.h> | |
11 | #include <linux/capability.h> | |
12 | #include <linux/time.h> | |
13 | #include <asm/current.h> | |
14 | #include <asm/uaccess.h> | |
15 | ||
16 | #include "jfs_incore.h" | |
17 | #include "jfs_dinode.h" | |
18 | #include "jfs_inode.h" | |
19 | ||
20 | ||
21 | static struct { | |
22 | long jfs_flag; | |
23 | long ext2_flag; | |
24 | } jfs_map[] = { | |
25 | {JFS_NOATIME_FL, EXT2_NOATIME_FL}, | |
26 | {JFS_DIRSYNC_FL, EXT2_DIRSYNC_FL}, | |
27 | {JFS_SYNC_FL, EXT2_SYNC_FL}, | |
28 | {JFS_SECRM_FL, EXT2_SECRM_FL}, | |
29 | {JFS_UNRM_FL, EXT2_UNRM_FL}, | |
30 | {JFS_APPEND_FL, EXT2_APPEND_FL}, | |
31 | {JFS_IMMUTABLE_FL, EXT2_IMMUTABLE_FL}, | |
32 | {0, 0}, | |
33 | }; | |
34 | ||
35 | static long jfs_map_ext2(unsigned long flags, int from) | |
36 | { | |
37 | int index=0; | |
38 | long mapped=0; | |
39 | ||
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; | |
47 | } | |
48 | index++; | |
49 | } | |
50 | return mapped; | |
51 | } | |
52 | ||
53 | ||
54 | int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd, | |
55 | unsigned long arg) | |
56 | { | |
57 | struct jfs_inode_info *jfs_inode = JFS_IP(inode); | |
58 | unsigned int flags; | |
59 | ||
60 | switch (cmd) { | |
61 | case JFS_IOC_GETFLAGS: | |
62 | flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE; | |
63 | flags = jfs_map_ext2(flags, 0); | |
64 | return put_user(flags, (int __user *) arg); | |
65 | case JFS_IOC_SETFLAGS: { | |
66 | unsigned int oldflags; | |
67 | ||
68 | if (IS_RDONLY(inode)) | |
69 | return -EROFS; | |
70 | ||
71 | if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) | |
72 | return -EACCES; | |
73 | ||
74 | if (get_user(flags, (int __user *) arg)) | |
75 | return -EFAULT; | |
76 | ||
77 | flags = jfs_map_ext2(flags, 1); | |
78 | if (!S_ISDIR(inode->i_mode)) | |
79 | flags &= ~JFS_DIRSYNC_FL; | |
80 | ||
81 | oldflags = jfs_inode->mode2; | |
82 | ||
83 | /* | |
84 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
85 | * the relevant capability. | |
86 | */ | |
87 | if ((oldflags & JFS_IMMUTABLE_FL) || | |
88 | ((flags ^ oldflags) & | |
89 | (JFS_APPEND_FL | JFS_IMMUTABLE_FL))) { | |
90 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
91 | return -EPERM; | |
92 | } | |
93 | ||
94 | flags = flags & JFS_FL_USER_MODIFIABLE; | |
95 | flags |= oldflags & ~JFS_FL_USER_MODIFIABLE; | |
96 | jfs_inode->mode2 = flags; | |
97 | ||
98 | jfs_set_inode_flags(inode); | |
99 | inode->i_ctime = CURRENT_TIME_SEC; | |
100 | mark_inode_dirty(inode); | |
101 | return 0; | |
102 | } | |
103 | default: | |
104 | return -ENOTTY; | |
105 | } | |
106 | } | |
107 |