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 | |
28 | static 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 | |
42 | static 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 | |
60 | int jfs_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
61 | { |
62 | struct jfs_inode_info *jfs_inode = JFS_IP(inode: 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, flags: jfs_map_ext2(flags, from: 0)); |
69 | |
70 | return 0; |
71 | } |
72 | |
73 | int jfs_fileattr_set(struct mnt_idmap *idmap, |
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(flags: fa->flags, from: 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_set_ctime_current(inode); |
100 | mark_inode_dirty(inode); |
101 | |
102 | return 0; |
103 | } |
104 | |
105 | long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
106 | { |
107 | struct inode *inode = file_inode(f: 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(bdev: sb->s_bdev)) { |
120 | jfs_warn("FITRIM not supported on device" ); |
121 | return -EOPNOTSUPP; |
122 | } |
123 | |
124 | if (copy_from_user(to: &range, from: (struct fstrim_range __user *)arg, |
125 | n: 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(ip: inode, range: &range); |
132 | if (ret < 0) |
133 | return ret; |
134 | |
135 | if (copy_to_user(to: (struct fstrim_range __user *)arg, from: &range, |
136 | n: sizeof(range))) |
137 | return -EFAULT; |
138 | |
139 | return 0; |
140 | } |
141 | |
142 | default: |
143 | return -ENOTTY; |
144 | } |
145 | } |
146 | |