4 * Copyright (C) 2006 Herbert Poetzl
5 * adapted from Remy Card's ext2/ioctl.c
9 #include <linux/ctype.h>
10 #include <linux/capability.h>
11 #include <linux/mount.h>
12 #include <linux/time.h>
13 #include <linux/sched.h>
14 #include <asm/current.h>
15 #include <asm/uaccess.h>
17 #include "jfs_incore.h"
18 #include "jfs_dinode.h"
19 #include "jfs_inode.h"
26 {JFS_NOATIME_FL
, FS_NOATIME_FL
},
27 {JFS_DIRSYNC_FL
, FS_DIRSYNC_FL
},
28 {JFS_SYNC_FL
, FS_SYNC_FL
},
29 {JFS_SECRM_FL
, FS_SECRM_FL
},
30 {JFS_UNRM_FL
, FS_UNRM_FL
},
31 {JFS_APPEND_FL
, FS_APPEND_FL
},
32 {JFS_IMMUTABLE_FL
, FS_IMMUTABLE_FL
},
36 static long jfs_map_ext2(unsigned long flags
, int from
)
41 while (jfs_map
[index
].jfs_flag
) {
43 if (jfs_map
[index
].ext2_flag
& flags
)
44 mapped
|= jfs_map
[index
].jfs_flag
;
46 if (jfs_map
[index
].jfs_flag
& flags
)
47 mapped
|= jfs_map
[index
].ext2_flag
;
55 long jfs_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
57 struct inode
*inode
= filp
->f_dentry
->d_inode
;
58 struct jfs_inode_info
*jfs_inode
= JFS_IP(inode
);
62 case JFS_IOC_GETFLAGS
:
63 jfs_get_inode_flags(jfs_inode
);
64 flags
= jfs_inode
->mode2
& JFS_FL_USER_VISIBLE
;
65 flags
= jfs_map_ext2(flags
, 0);
66 return put_user(flags
, (int __user
*) arg
);
67 case JFS_IOC_SETFLAGS
: {
68 unsigned int oldflags
;
71 err
= mnt_want_write(filp
->f_path
.mnt
);
75 if (!is_owner_or_cap(inode
)) {
79 if (get_user(flags
, (int __user
*) arg
)) {
84 flags
= jfs_map_ext2(flags
, 1);
85 if (!S_ISDIR(inode
->i_mode
))
86 flags
&= ~JFS_DIRSYNC_FL
;
88 /* Is it quota file? Do not allow user to mess with it */
89 if (IS_NOQUOTA(inode
)) {
94 /* Lock against other parallel changes of flags */
95 mutex_lock(&inode
->i_mutex
);
97 jfs_get_inode_flags(jfs_inode
);
98 oldflags
= jfs_inode
->mode2
;
101 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
102 * the relevant capability.
104 if ((oldflags
& JFS_IMMUTABLE_FL
) ||
105 ((flags
^ oldflags
) &
106 (JFS_APPEND_FL
| JFS_IMMUTABLE_FL
))) {
107 if (!capable(CAP_LINUX_IMMUTABLE
)) {
108 mutex_unlock(&inode
->i_mutex
);
114 flags
= flags
& JFS_FL_USER_MODIFIABLE
;
115 flags
|= oldflags
& ~JFS_FL_USER_MODIFIABLE
;
116 jfs_inode
->mode2
= flags
;
118 jfs_set_inode_flags(inode
);
119 mutex_unlock(&inode
->i_mutex
);
120 inode
->i_ctime
= CURRENT_TIME_SEC
;
121 mark_inode_dirty(inode
);
123 mnt_drop_write(filp
->f_path
.mnt
);
132 long jfs_compat_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
134 /* While these ioctl numbers defined with 'long' and have different
135 * numbers than the 64bit ABI,
136 * the actual implementation only deals with ints and is compatible.
139 case JFS_IOC_GETFLAGS32
:
140 cmd
= JFS_IOC_GETFLAGS
;
142 case JFS_IOC_SETFLAGS32
:
143 cmd
= JFS_IOC_SETFLAGS
;
146 return jfs_ioctl(filp
, cmd
, arg
);
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