fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
[sfrench/cifs-2.6.git] / arch / arm64 / include / asm / compat.h
1 /*
2  * Copyright (C) 2012 ARM Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15  */
16 #ifndef __ASM_COMPAT_H
17 #define __ASM_COMPAT_H
18 #ifdef __KERNEL__
19 #ifdef CONFIG_COMPAT
20
21 /*
22  * Architecture specific compatibility types
23  */
24 #include <linux/types.h>
25 #include <linux/sched.h>
26 #include <linux/sched/task_stack.h>
27
28 #define COMPAT_USER_HZ          100
29 #ifdef __AARCH64EB__
30 #define COMPAT_UTS_MACHINE      "armv8b\0\0"
31 #else
32 #define COMPAT_UTS_MACHINE      "armv8l\0\0"
33 #endif
34
35 typedef u32             compat_size_t;
36 typedef s32             compat_ssize_t;
37 typedef s32             compat_time_t;
38 typedef s32             compat_clock_t;
39 typedef s32             compat_pid_t;
40 typedef u16             __compat_uid_t;
41 typedef u16             __compat_gid_t;
42 typedef u16             __compat_uid16_t;
43 typedef u16             __compat_gid16_t;
44 typedef u32             __compat_uid32_t;
45 typedef u32             __compat_gid32_t;
46 typedef u16             compat_mode_t;
47 typedef u32             compat_ino_t;
48 typedef u32             compat_dev_t;
49 typedef s32             compat_off_t;
50 typedef s64             compat_loff_t;
51 typedef s32             compat_nlink_t;
52 typedef u16             compat_ipc_pid_t;
53 typedef s32             compat_daddr_t;
54 typedef u32             compat_caddr_t;
55 typedef __kernel_fsid_t compat_fsid_t;
56 typedef s32             compat_key_t;
57 typedef s32             compat_timer_t;
58
59 typedef s16             compat_short_t;
60 typedef s32             compat_int_t;
61 typedef s32             compat_long_t;
62 typedef s64             compat_s64;
63 typedef u16             compat_ushort_t;
64 typedef u32             compat_uint_t;
65 typedef u32             compat_ulong_t;
66 typedef u64             compat_u64;
67 typedef u32             compat_uptr_t;
68
69 struct compat_timespec {
70         compat_time_t   tv_sec;
71         s32             tv_nsec;
72 };
73
74 struct compat_timeval {
75         compat_time_t   tv_sec;
76         s32             tv_usec;
77 };
78
79 struct compat_stat {
80 #ifdef __AARCH64EB__
81         short           st_dev;
82         short           __pad1;
83 #else
84         compat_dev_t    st_dev;
85 #endif
86         compat_ino_t    st_ino;
87         compat_mode_t   st_mode;
88         compat_ushort_t st_nlink;
89         __compat_uid16_t        st_uid;
90         __compat_gid16_t        st_gid;
91 #ifdef __AARCH64EB__
92         short           st_rdev;
93         short           __pad2;
94 #else
95         compat_dev_t    st_rdev;
96 #endif
97         compat_off_t    st_size;
98         compat_off_t    st_blksize;
99         compat_off_t    st_blocks;
100         compat_time_t   st_atime;
101         compat_ulong_t  st_atime_nsec;
102         compat_time_t   st_mtime;
103         compat_ulong_t  st_mtime_nsec;
104         compat_time_t   st_ctime;
105         compat_ulong_t  st_ctime_nsec;
106         compat_ulong_t  __unused4[2];
107 };
108
109 struct compat_flock {
110         short           l_type;
111         short           l_whence;
112         compat_off_t    l_start;
113         compat_off_t    l_len;
114         compat_pid_t    l_pid;
115 };
116
117 #define F_GETLK64       12      /*  using 'struct flock64' */
118 #define F_SETLK64       13
119 #define F_SETLKW64      14
120
121 struct compat_flock64 {
122         short           l_type;
123         short           l_whence;
124         compat_loff_t   l_start;
125         compat_loff_t   l_len;
126         compat_pid_t    l_pid;
127 };
128
129 struct compat_statfs {
130         int             f_type;
131         int             f_bsize;
132         int             f_blocks;
133         int             f_bfree;
134         int             f_bavail;
135         int             f_files;
136         int             f_ffree;
137         compat_fsid_t   f_fsid;
138         int             f_namelen;      /* SunOS ignores this field. */
139         int             f_frsize;
140         int             f_flags;
141         int             f_spare[4];
142 };
143
144 #define COMPAT_RLIM_INFINITY            0xffffffff
145
146 typedef u32             compat_old_sigset_t;
147
148 #define _COMPAT_NSIG            64
149 #define _COMPAT_NSIG_BPW        32
150
151 typedef u32             compat_sigset_word;
152
153 typedef union compat_sigval {
154         compat_int_t    sival_int;
155         compat_uptr_t   sival_ptr;
156 } compat_sigval_t;
157
158 typedef struct compat_siginfo {
159         int si_signo;
160         int si_errno;
161         int si_code;
162
163         union {
164                 int _pad[128/sizeof(int) - 3];
165
166                 /* kill() */
167                 struct {
168                         compat_pid_t _pid;      /* sender's pid */
169                         __compat_uid32_t _uid;  /* sender's uid */
170                 } _kill;
171
172                 /* POSIX.1b timers */
173                 struct {
174                         compat_timer_t _tid;    /* timer id */
175                         int _overrun;           /* overrun count */
176                         compat_sigval_t _sigval;        /* same as below */
177                         int _sys_private;       /* not to be passed to user */
178                 } _timer;
179
180                 /* POSIX.1b signals */
181                 struct {
182                         compat_pid_t _pid;      /* sender's pid */
183                         __compat_uid32_t _uid;  /* sender's uid */
184                         compat_sigval_t _sigval;
185                 } _rt;
186
187                 /* SIGCHLD */
188                 struct {
189                         compat_pid_t _pid;      /* which child */
190                         __compat_uid32_t _uid;  /* sender's uid */
191                         int _status;            /* exit code */
192                         compat_clock_t _utime;
193                         compat_clock_t _stime;
194                 } _sigchld;
195
196                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
197                 struct {
198                         compat_uptr_t _addr; /* faulting insn/memory ref. */
199                         short _addr_lsb; /* LSB of the reported address */
200                 } _sigfault;
201
202                 /* SIGPOLL */
203                 struct {
204                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
205                         int _fd;
206                 } _sigpoll;
207
208                 /* SIGSYS */
209                 struct {
210                         compat_uptr_t _call_addr; /* calling user insn */
211                         int _syscall;   /* triggering system call number */
212                         compat_uint_t _arch;    /* AUDIT_ARCH_* of syscall */
213                 } _sigsys;
214         } _sifields;
215 } compat_siginfo_t;
216
217 #define COMPAT_OFF_T_MAX        0x7fffffff
218
219 /*
220  * A pointer passed in from user mode. This should not
221  * be used for syscall parameters, just declare them
222  * as pointers because the syscall entry code will have
223  * appropriately converted them already.
224  */
225
226 static inline void __user *compat_ptr(compat_uptr_t uptr)
227 {
228         return (void __user *)(unsigned long)uptr;
229 }
230
231 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
232 {
233         return (u32)(unsigned long)uptr;
234 }
235
236 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
237
238 static inline void __user *arch_compat_alloc_user_space(long len)
239 {
240         return (void __user *)compat_user_stack_pointer() - len;
241 }
242
243 struct compat_ipc64_perm {
244         compat_key_t key;
245         __compat_uid32_t uid;
246         __compat_gid32_t gid;
247         __compat_uid32_t cuid;
248         __compat_gid32_t cgid;
249         unsigned short mode;
250         unsigned short __pad1;
251         unsigned short seq;
252         unsigned short __pad2;
253         compat_ulong_t unused1;
254         compat_ulong_t unused2;
255 };
256
257 struct compat_semid64_ds {
258         struct compat_ipc64_perm sem_perm;
259         compat_time_t  sem_otime;
260         compat_ulong_t __unused1;
261         compat_time_t  sem_ctime;
262         compat_ulong_t __unused2;
263         compat_ulong_t sem_nsems;
264         compat_ulong_t __unused3;
265         compat_ulong_t __unused4;
266 };
267
268 struct compat_msqid64_ds {
269         struct compat_ipc64_perm msg_perm;
270         compat_time_t  msg_stime;
271         compat_ulong_t __unused1;
272         compat_time_t  msg_rtime;
273         compat_ulong_t __unused2;
274         compat_time_t  msg_ctime;
275         compat_ulong_t __unused3;
276         compat_ulong_t msg_cbytes;
277         compat_ulong_t msg_qnum;
278         compat_ulong_t msg_qbytes;
279         compat_pid_t   msg_lspid;
280         compat_pid_t   msg_lrpid;
281         compat_ulong_t __unused4;
282         compat_ulong_t __unused5;
283 };
284
285 struct compat_shmid64_ds {
286         struct compat_ipc64_perm shm_perm;
287         compat_size_t  shm_segsz;
288         compat_time_t  shm_atime;
289         compat_ulong_t __unused1;
290         compat_time_t  shm_dtime;
291         compat_ulong_t __unused2;
292         compat_time_t  shm_ctime;
293         compat_ulong_t __unused3;
294         compat_pid_t   shm_cpid;
295         compat_pid_t   shm_lpid;
296         compat_ulong_t shm_nattch;
297         compat_ulong_t __unused4;
298         compat_ulong_t __unused5;
299 };
300
301 static inline int is_compat_task(void)
302 {
303         return test_thread_flag(TIF_32BIT);
304 }
305
306 static inline int is_compat_thread(struct thread_info *thread)
307 {
308         return test_ti_thread_flag(thread, TIF_32BIT);
309 }
310
311 #else /* !CONFIG_COMPAT */
312
313 static inline int is_compat_thread(struct thread_info *thread)
314 {
315         return 0;
316 }
317
318 #endif /* CONFIG_COMPAT */
319 #endif /* __KERNEL__ */
320 #endif /* __ASM_COMPAT_H */