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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/jfs/ioctl.c
4 *
5 * Copyright (C) 2006 Herbert Poetzl
6 * adapted from Remy Card's ext2/ioctl.c
7 */
8
9#include <linux/fs.h>
10#include <linux/ctype.h>
11#include <linux/capability.h>
12#include <linux/mount.h>
13#include <linux/time.h>
14#include <linux/sched.h>
15#include <linux/blkdev.h>
16#include <asm/current.h>
17#include <linux/uaccess.h>
18#include <linux/fileattr.h>
19
20#include "jfs_filsys.h"
21#include "jfs_debug.h"
22#include "jfs_incore.h"
23#include "jfs_dinode.h"
24#include "jfs_inode.h"
25#include "jfs_dmap.h"
26#include "jfs_discard.h"
27
28static struct {
29 long jfs_flag;
30 long ext2_flag;
31} jfs_map[] = {
32 {JFS_NOATIME_FL, FS_NOATIME_FL},
33 {JFS_DIRSYNC_FL, FS_DIRSYNC_FL},
34 {JFS_SYNC_FL, FS_SYNC_FL},
35 {JFS_SECRM_FL, FS_SECRM_FL},
36 {JFS_UNRM_FL, FS_UNRM_FL},
37 {JFS_APPEND_FL, FS_APPEND_FL},
38 {JFS_IMMUTABLE_FL, FS_IMMUTABLE_FL},
39 {0, 0},
40};
41
42static long jfs_map_ext2(unsigned long flags, int from)
43{
44 int index=0;
45 long mapped=0;
46
47 while (jfs_map[index].jfs_flag) {
48 if (from) {
49 if (jfs_map[index].ext2_flag & flags)
50 mapped |= jfs_map[index].jfs_flag;
51 } else {
52 if (jfs_map[index].jfs_flag & flags)
53 mapped |= jfs_map[index].ext2_flag;
54 }
55 index++;
56 }
57 return mapped;
58}
59
60int jfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
61{
62 struct jfs_inode_info *jfs_inode = JFS_IP(d_inode(dentry));
63 unsigned int flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
64
65 if (d_is_special(dentry))
66 return -ENOTTY;
67
68 fileattr_fill_flags(fa, jfs_map_ext2(flags, 0));
69
70 return 0;
71}
72
73int jfs_fileattr_set(struct user_namespace *mnt_userns,
74 struct dentry *dentry, struct fileattr *fa)
75{
76 struct inode *inode = d_inode(dentry);
77 struct jfs_inode_info *jfs_inode = JFS_IP(inode);
78 unsigned int flags;
79
80 if (d_is_special(dentry))
81 return -ENOTTY;
82
83 if (fileattr_has_fsx(fa))
84 return -EOPNOTSUPP;
85
86 flags = jfs_map_ext2(fa->flags, 1);
87 if (!S_ISDIR(inode->i_mode))
88 flags &= ~JFS_DIRSYNC_FL;
89
90 /* Is it quota file? Do not allow user to mess with it */
91 if (IS_NOQUOTA(inode))
92 return -EPERM;
93
94 flags = flags & JFS_FL_USER_MODIFIABLE;
95 flags |= jfs_inode->mode2 & ~JFS_FL_USER_MODIFIABLE;
96 jfs_inode->mode2 = flags;
97
98 jfs_set_inode_flags(inode);
99 inode->i_ctime = current_time(inode);
100 mark_inode_dirty(inode);
101
102 return 0;
103}
104
105long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
106{
107 struct inode *inode = file_inode(filp);
108
109 switch (cmd) {
110 case FITRIM:
111 {
112 struct super_block *sb = inode->i_sb;
113 struct fstrim_range range;
114 s64 ret = 0;
115
116 if (!capable(CAP_SYS_ADMIN))
117 return -EPERM;
118
119 if (!bdev_max_discard_sectors(sb->s_bdev)) {
120 jfs_warn("FITRIM not supported on device");
121 return -EOPNOTSUPP;
122 }
123
124 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
125 sizeof(range)))
126 return -EFAULT;
127
128 range.minlen = max_t(unsigned int, range.minlen,
129 bdev_discard_granularity(sb->s_bdev));
130
131 ret = jfs_ioc_trim(inode, &range);
132 if (ret < 0)
133 return ret;
134
135 if (copy_to_user((struct fstrim_range __user *)arg, &range,
136 sizeof(range)))
137 return -EFAULT;
138
139 return 0;
140 }
141
142 default:
143 return -ENOTTY;
144 }
145}
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/ctype.h>
10#include <linux/capability.h>
11#include <linux/mount.h>
12#include <linux/time.h>
13#include <linux/sched.h>
14#include <linux/blkdev.h>
15#include <asm/current.h>
16#include <linux/uaccess.h>
17
18#include "jfs_filsys.h"
19#include "jfs_debug.h"
20#include "jfs_incore.h"
21#include "jfs_dinode.h"
22#include "jfs_inode.h"
23#include "jfs_dmap.h"
24#include "jfs_discard.h"
25
26static struct {
27 long jfs_flag;
28 long ext2_flag;
29} jfs_map[] = {
30 {JFS_NOATIME_FL, FS_NOATIME_FL},
31 {JFS_DIRSYNC_FL, FS_DIRSYNC_FL},
32 {JFS_SYNC_FL, FS_SYNC_FL},
33 {JFS_SECRM_FL, FS_SECRM_FL},
34 {JFS_UNRM_FL, FS_UNRM_FL},
35 {JFS_APPEND_FL, FS_APPEND_FL},
36 {JFS_IMMUTABLE_FL, FS_IMMUTABLE_FL},
37 {0, 0},
38};
39
40static long jfs_map_ext2(unsigned long flags, int from)
41{
42 int index=0;
43 long mapped=0;
44
45 while (jfs_map[index].jfs_flag) {
46 if (from) {
47 if (jfs_map[index].ext2_flag & flags)
48 mapped |= jfs_map[index].jfs_flag;
49 } else {
50 if (jfs_map[index].jfs_flag & flags)
51 mapped |= jfs_map[index].ext2_flag;
52 }
53 index++;
54 }
55 return mapped;
56}
57
58
59long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
60{
61 struct inode *inode = file_inode(filp);
62 struct jfs_inode_info *jfs_inode = JFS_IP(inode);
63 unsigned int flags;
64
65 switch (cmd) {
66 case JFS_IOC_GETFLAGS:
67 jfs_get_inode_flags(jfs_inode);
68 flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
69 flags = jfs_map_ext2(flags, 0);
70 return put_user(flags, (int __user *) arg);
71 case JFS_IOC_SETFLAGS: {
72 unsigned int oldflags;
73 int err;
74
75 err = mnt_want_write_file(filp);
76 if (err)
77 return err;
78
79 if (!inode_owner_or_capable(inode)) {
80 err = -EACCES;
81 goto setflags_out;
82 }
83 if (get_user(flags, (int __user *) arg)) {
84 err = -EFAULT;
85 goto setflags_out;
86 }
87
88 flags = jfs_map_ext2(flags, 1);
89 if (!S_ISDIR(inode->i_mode))
90 flags &= ~JFS_DIRSYNC_FL;
91
92 /* Is it quota file? Do not allow user to mess with it */
93 if (IS_NOQUOTA(inode)) {
94 err = -EPERM;
95 goto setflags_out;
96 }
97
98 /* Lock against other parallel changes of flags */
99 inode_lock(inode);
100
101 jfs_get_inode_flags(jfs_inode);
102 oldflags = jfs_inode->mode2;
103
104 /*
105 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
106 * the relevant capability.
107 */
108 if ((oldflags & JFS_IMMUTABLE_FL) ||
109 ((flags ^ oldflags) &
110 (JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
111 if (!capable(CAP_LINUX_IMMUTABLE)) {
112 inode_unlock(inode);
113 err = -EPERM;
114 goto setflags_out;
115 }
116 }
117
118 flags = flags & JFS_FL_USER_MODIFIABLE;
119 flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
120 jfs_inode->mode2 = flags;
121
122 jfs_set_inode_flags(inode);
123 inode_unlock(inode);
124 inode->i_ctime = current_time(inode);
125 mark_inode_dirty(inode);
126setflags_out:
127 mnt_drop_write_file(filp);
128 return err;
129 }
130
131 case FITRIM:
132 {
133 struct super_block *sb = inode->i_sb;
134 struct request_queue *q = bdev_get_queue(sb->s_bdev);
135 struct fstrim_range range;
136 s64 ret = 0;
137
138 if (!capable(CAP_SYS_ADMIN))
139 return -EPERM;
140
141 if (!blk_queue_discard(q)) {
142 jfs_warn("FITRIM not supported on device");
143 return -EOPNOTSUPP;
144 }
145
146 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
147 sizeof(range)))
148 return -EFAULT;
149
150 range.minlen = max_t(unsigned int, range.minlen,
151 q->limits.discard_granularity);
152
153 ret = jfs_ioc_trim(inode, &range);
154 if (ret < 0)
155 return ret;
156
157 if (copy_to_user((struct fstrim_range __user *)arg, &range,
158 sizeof(range)))
159 return -EFAULT;
160
161 return 0;
162 }
163
164 default:
165 return -ENOTTY;
166 }
167}
168
169#ifdef CONFIG_COMPAT
170long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
171{
172 /* While these ioctl numbers defined with 'long' and have different
173 * numbers than the 64bit ABI,
174 * the actual implementation only deals with ints and is compatible.
175 */
176 switch (cmd) {
177 case JFS_IOC_GETFLAGS32:
178 cmd = JFS_IOC_GETFLAGS;
179 break;
180 case JFS_IOC_SETFLAGS32:
181 cmd = JFS_IOC_SETFLAGS;
182 break;
183 }
184 return jfs_ioctl(filp, cmd, arg);
185}
186#endif