1 // SPDX-License-Identifier: GPL-2.0-only
3 * This file is part of UBIFS.
5 * Copyright (C) 2006-2008 Nokia Corporation.
6 * Copyright (C) 2006, 2007 University of Szeged, Hungary
8 * Authors: Zoltan Sogor
9 * Artem Bityutskiy (Битюцкий Артём)
13 /* This file implements EXT2-compatible extended attribute ioctl() calls */
15 #include <linux/compat.h>
16 #include <linux/mount.h>
19 /* Need to be kept consistent with checked flags in ioctl2ubifs() */
20 #define UBIFS_SETTABLE_IOCTL_FLAGS \
21 (FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
22 FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
24 /* Need to be kept consistent with checked flags in ubifs2ioctl() */
25 #define UBIFS_GETTABLE_IOCTL_FLAGS \
26 (UBIFS_SETTABLE_IOCTL_FLAGS | FS_ENCRYPT_FL)
29 * ubifs_set_inode_flags - set VFS inode flags.
30 * @inode: VFS inode to set flags for
32 * This function propagates flags from UBIFS inode object to VFS inode object.
34 void ubifs_set_inode_flags(struct inode
*inode
)
36 unsigned int flags
= ubifs_inode(inode
)->flags
;
38 inode
->i_flags
&= ~(S_SYNC
| S_APPEND
| S_IMMUTABLE
| S_DIRSYNC
|
40 if (flags
& UBIFS_SYNC_FL
)
41 inode
->i_flags
|= S_SYNC
;
42 if (flags
& UBIFS_APPEND_FL
)
43 inode
->i_flags
|= S_APPEND
;
44 if (flags
& UBIFS_IMMUTABLE_FL
)
45 inode
->i_flags
|= S_IMMUTABLE
;
46 if (flags
& UBIFS_DIRSYNC_FL
)
47 inode
->i_flags
|= S_DIRSYNC
;
48 if (flags
& UBIFS_CRYPT_FL
)
49 inode
->i_flags
|= S_ENCRYPTED
;
53 * ioctl2ubifs - convert ioctl inode flags to UBIFS inode flags.
54 * @ioctl_flags: flags to convert
56 * This function converts ioctl flags (@FS_COMPR_FL, etc) to UBIFS inode flags
57 * (@UBIFS_COMPR_FL, etc).
59 static int ioctl2ubifs(int ioctl_flags
)
63 if (ioctl_flags
& FS_COMPR_FL
)
64 ubifs_flags
|= UBIFS_COMPR_FL
;
65 if (ioctl_flags
& FS_SYNC_FL
)
66 ubifs_flags
|= UBIFS_SYNC_FL
;
67 if (ioctl_flags
& FS_APPEND_FL
)
68 ubifs_flags
|= UBIFS_APPEND_FL
;
69 if (ioctl_flags
& FS_IMMUTABLE_FL
)
70 ubifs_flags
|= UBIFS_IMMUTABLE_FL
;
71 if (ioctl_flags
& FS_DIRSYNC_FL
)
72 ubifs_flags
|= UBIFS_DIRSYNC_FL
;
78 * ubifs2ioctl - convert UBIFS inode flags to ioctl inode flags.
79 * @ubifs_flags: flags to convert
81 * This function converts UBIFS inode flags (@UBIFS_COMPR_FL, etc) to ioctl
82 * flags (@FS_COMPR_FL, etc).
84 static int ubifs2ioctl(int ubifs_flags
)
88 if (ubifs_flags
& UBIFS_COMPR_FL
)
89 ioctl_flags
|= FS_COMPR_FL
;
90 if (ubifs_flags
& UBIFS_SYNC_FL
)
91 ioctl_flags
|= FS_SYNC_FL
;
92 if (ubifs_flags
& UBIFS_APPEND_FL
)
93 ioctl_flags
|= FS_APPEND_FL
;
94 if (ubifs_flags
& UBIFS_IMMUTABLE_FL
)
95 ioctl_flags
|= FS_IMMUTABLE_FL
;
96 if (ubifs_flags
& UBIFS_DIRSYNC_FL
)
97 ioctl_flags
|= FS_DIRSYNC_FL
;
98 if (ubifs_flags
& UBIFS_CRYPT_FL
)
99 ioctl_flags
|= FS_ENCRYPT_FL
;
104 static int setflags(struct inode
*inode
, int flags
)
106 int oldflags
, err
, release
;
107 struct ubifs_inode
*ui
= ubifs_inode(inode
);
108 struct ubifs_info
*c
= inode
->i_sb
->s_fs_info
;
109 struct ubifs_budget_req req
= { .dirtied_ino
= 1,
110 .dirtied_ino_d
= ui
->data_len
};
112 err
= ubifs_budget_space(c
, &req
);
116 mutex_lock(&ui
->ui_mutex
);
117 oldflags
= ubifs2ioctl(ui
->flags
);
118 err
= vfs_ioc_setflags_prepare(inode
, oldflags
, flags
);
122 ui
->flags
&= ~ioctl2ubifs(UBIFS_SETTABLE_IOCTL_FLAGS
);
123 ui
->flags
|= ioctl2ubifs(flags
);
124 ubifs_set_inode_flags(inode
);
125 inode
->i_ctime
= current_time(inode
);
127 mark_inode_dirty_sync(inode
);
128 mutex_unlock(&ui
->ui_mutex
);
131 ubifs_release_budget(c
, &req
);
133 err
= write_inode_now(inode
, 1);
137 mutex_unlock(&ui
->ui_mutex
);
138 ubifs_release_budget(c
, &req
);
142 long ubifs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
145 struct inode
*inode
= file_inode(file
);
148 case FS_IOC_GETFLAGS
:
149 flags
= ubifs2ioctl(ubifs_inode(inode
)->flags
);
151 dbg_gen("get flags: %#x, i_flags %#x", flags
, inode
->i_flags
);
152 return put_user(flags
, (int __user
*) arg
);
154 case FS_IOC_SETFLAGS
: {
155 if (IS_RDONLY(inode
))
158 if (!inode_owner_or_capable(inode
))
161 if (get_user(flags
, (int __user
*) arg
))
164 if (flags
& ~UBIFS_GETTABLE_IOCTL_FLAGS
)
166 flags
&= UBIFS_SETTABLE_IOCTL_FLAGS
;
168 if (!S_ISDIR(inode
->i_mode
))
169 flags
&= ~FS_DIRSYNC_FL
;
172 * Make sure the file-system is read-write and make sure it
173 * will not become read-only while we are changing the flags.
175 err
= mnt_want_write_file(file
);
178 dbg_gen("set flags: %#x, i_flags %#x", flags
, inode
->i_flags
);
179 err
= setflags(inode
, flags
);
180 mnt_drop_write_file(file
);
183 case FS_IOC_SET_ENCRYPTION_POLICY
: {
184 struct ubifs_info
*c
= inode
->i_sb
->s_fs_info
;
186 err
= ubifs_enable_encryption(c
);
190 return fscrypt_ioctl_set_policy(file
, (const void __user
*)arg
);
192 case FS_IOC_GET_ENCRYPTION_POLICY
:
193 return fscrypt_ioctl_get_policy(file
, (void __user
*)arg
);
195 case FS_IOC_GET_ENCRYPTION_POLICY_EX
:
196 return fscrypt_ioctl_get_policy_ex(file
, (void __user
*)arg
);
198 case FS_IOC_ADD_ENCRYPTION_KEY
:
199 return fscrypt_ioctl_add_key(file
, (void __user
*)arg
);
201 case FS_IOC_REMOVE_ENCRYPTION_KEY
:
202 return fscrypt_ioctl_remove_key(file
, (void __user
*)arg
);
204 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS
:
205 return fscrypt_ioctl_remove_key_all_users(file
,
207 case FS_IOC_GET_ENCRYPTION_KEY_STATUS
:
208 return fscrypt_ioctl_get_key_status(file
, (void __user
*)arg
);
210 case FS_IOC_GET_ENCRYPTION_NONCE
:
211 return fscrypt_ioctl_get_nonce(file
, (void __user
*)arg
);
219 long ubifs_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
222 case FS_IOC32_GETFLAGS
:
223 cmd
= FS_IOC_GETFLAGS
;
225 case FS_IOC32_SETFLAGS
:
226 cmd
= FS_IOC_SETFLAGS
;
228 case FS_IOC_SET_ENCRYPTION_POLICY
:
229 case FS_IOC_GET_ENCRYPTION_POLICY
:
230 case FS_IOC_GET_ENCRYPTION_POLICY_EX
:
231 case FS_IOC_ADD_ENCRYPTION_KEY
:
232 case FS_IOC_REMOVE_ENCRYPTION_KEY
:
233 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS
:
234 case FS_IOC_GET_ENCRYPTION_KEY_STATUS
:
235 case FS_IOC_GET_ENCRYPTION_NONCE
:
240 return ubifs_ioctl(file
, cmd
, (unsigned long)compat_ptr(arg
));