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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d9e90266 HP |
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> | |
d9e90266 HP |
10 | #include <linux/ctype.h> |
11 | #include <linux/capability.h> | |
42a74f20 | 12 | #include <linux/mount.h> |
d9e90266 | 13 | #include <linux/time.h> |
914e2637 | 14 | #include <linux/sched.h> |
b40c2e66 | 15 | #include <linux/blkdev.h> |
d9e90266 | 16 | #include <asm/current.h> |
7c0f6ba6 | 17 | #include <linux/uaccess.h> |
2ca58e30 | 18 | #include <linux/fileattr.h> |
d9e90266 | 19 | |
b40c2e66 TR |
20 | #include "jfs_filsys.h" |
21 | #include "jfs_debug.h" | |
d9e90266 HP |
22 | #include "jfs_incore.h" |
23 | #include "jfs_dinode.h" | |
24 | #include "jfs_inode.h" | |
b40c2e66 TR |
25 | #include "jfs_dmap.h" |
26 | #include "jfs_discard.h" | |
d9e90266 HP |
27 | |
28 | static struct { | |
29 | long jfs_flag; | |
30 | long ext2_flag; | |
31 | } jfs_map[] = { | |
36695673 DH |
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}, | |
d9e90266 HP |
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 | ||
2ca58e30 MS |
60 | int 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; | |
d9e90266 | 64 | |
2ca58e30 MS |
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 | ||
73 | int jfs_fileattr_set(struct user_namespace *mnt_userns, | |
74 | struct dentry *dentry, struct fileattr *fa) | |
d9e90266 | 75 | { |
2ca58e30 | 76 | struct inode *inode = d_inode(dentry); |
d9e90266 HP |
77 | struct jfs_inode_info *jfs_inode = JFS_IP(inode); |
78 | unsigned int flags; | |
79 | ||
2ca58e30 MS |
80 | if (d_is_special(dentry)) |
81 | return -ENOTTY; | |
d9e90266 | 82 | |
2ca58e30 MS |
83 | if (fileattr_has_fsx(fa)) |
84 | return -EOPNOTSUPP; | |
d9e90266 | 85 | |
2ca58e30 MS |
86 | flags = jfs_map_ext2(fa->flags, 1); |
87 | if (!S_ISDIR(inode->i_mode)) | |
88 | flags &= ~JFS_DIRSYNC_FL; | |
baab81fa | 89 | |
2ca58e30 MS |
90 | /* Is it quota file? Do not allow user to mess with it */ |
91 | if (IS_NOQUOTA(inode)) | |
92 | return -EPERM; | |
baab81fa | 93 | |
2ca58e30 MS |
94 | flags = flags & JFS_FL_USER_MODIFIABLE; |
95 | flags |= jfs_inode->mode2 & ~JFS_FL_USER_MODIFIABLE; | |
96 | jfs_inode->mode2 = flags; | |
d9e90266 | 97 | |
2ca58e30 MS |
98 | jfs_set_inode_flags(inode); |
99 | inode->i_ctime = current_time(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(filp); | |
b40c2e66 | 108 | |
2ca58e30 | 109 | switch (cmd) { |
b40c2e66 TR |
110 | case FITRIM: |
111 | { | |
112 | struct super_block *sb = inode->i_sb; | |
113 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
114 | struct fstrim_range range; | |
115 | s64 ret = 0; | |
116 | ||
117 | if (!capable(CAP_SYS_ADMIN)) | |
118 | return -EPERM; | |
119 | ||
70200574 | 120 | if (!bdev_max_discard_sectors(sb->s_bdev)) { |
b40c2e66 TR |
121 | jfs_warn("FITRIM not supported on device"); |
122 | return -EOPNOTSUPP; | |
123 | } | |
124 | ||
125 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, | |
126 | sizeof(range))) | |
127 | return -EFAULT; | |
128 | ||
129 | range.minlen = max_t(unsigned int, range.minlen, | |
130 | q->limits.discard_granularity); | |
131 | ||
132 | ret = jfs_ioc_trim(inode, &range); | |
133 | if (ret < 0) | |
134 | return ret; | |
135 | ||
136 | if (copy_to_user((struct fstrim_range __user *)arg, &range, | |
137 | sizeof(range))) | |
138 | return -EFAULT; | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
d9e90266 HP |
143 | default: |
144 | return -ENOTTY; | |
145 | } | |
146 | } |