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dax: Fix unlock mismatch with updated API
[mirror_ubuntu-eoan-kernel.git] / include / linux / compat.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
4 /*
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
7 */
8
9 #include <linux/types.h>
10 #include <linux/time.h>
11
12 #include <linux/stat.h>
13 #include <linux/param.h> /* for HZ */
14 #include <linux/sem.h>
15 #include <linux/socket.h>
16 #include <linux/if.h>
17 #include <linux/fs.h>
18 #include <linux/aio_abi.h> /* for aio_context_t */
19 #include <linux/uaccess.h>
20 #include <linux/unistd.h>
21
22 #include <asm/compat.h>
23
24 #ifdef CONFIG_COMPAT
25 #include <asm/siginfo.h>
26 #include <asm/signal.h>
27 #endif
28
29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
30 /*
31 * It may be useful for an architecture to override the definitions of the
32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
33 * to use a different calling convention for syscalls. To allow for that,
34 + the prototypes for the compat_sys_*() functions below will *not* be included
35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
36 */
37 #include <asm/syscall_wrapper.h>
38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
39
40 #ifndef COMPAT_USE_64BIT_TIME
41 #define COMPAT_USE_64BIT_TIME 0
42 #endif
43
44 #ifndef __SC_DELOUSE
45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
46 #endif
47
48 #ifndef COMPAT_SYSCALL_DEFINE0
49 #define COMPAT_SYSCALL_DEFINE0(name) \
50 asmlinkage long compat_sys_##name(void); \
51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
52 asmlinkage long compat_sys_##name(void)
53 #endif /* COMPAT_SYSCALL_DEFINE0 */
54
55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
67
68 /*
69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
70 * sign-extends 32-bit ints to longs whenever needed. The actual work is
71 * done within __do_compat_sys_*().
72 */
73 #ifndef COMPAT_SYSCALL_DEFINEx
74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
75 __diag_push(); \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
85 { \
86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
88 return ret; \
89 } \
90 __diag_pop(); \
91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
92 #endif /* COMPAT_SYSCALL_DEFINEx */
93
94 #ifdef CONFIG_COMPAT
95
96 #ifndef compat_user_stack_pointer
97 #define compat_user_stack_pointer() current_user_stack_pointer()
98 #endif
99 #ifndef compat_sigaltstack /* we'll need that for MIPS */
100 typedef struct compat_sigaltstack {
101 compat_uptr_t ss_sp;
102 int ss_flags;
103 compat_size_t ss_size;
104 } compat_stack_t;
105 #endif
106 #ifndef COMPAT_MINSIGSTKSZ
107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
108 #endif
109
110 #define compat_jiffies_to_clock_t(x) \
111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
112
113 typedef __compat_uid32_t compat_uid_t;
114 typedef __compat_gid32_t compat_gid_t;
115
116 struct compat_sel_arg_struct;
117 struct rusage;
118
119 struct compat_itimerval {
120 struct old_timeval32 it_interval;
121 struct old_timeval32 it_value;
122 };
123
124 struct itimerval;
125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
127
128 struct compat_tms {
129 compat_clock_t tms_utime;
130 compat_clock_t tms_stime;
131 compat_clock_t tms_cutime;
132 compat_clock_t tms_cstime;
133 };
134
135 struct compat_timex {
136 compat_uint_t modes;
137 compat_long_t offset;
138 compat_long_t freq;
139 compat_long_t maxerror;
140 compat_long_t esterror;
141 compat_int_t status;
142 compat_long_t constant;
143 compat_long_t precision;
144 compat_long_t tolerance;
145 struct old_timeval32 time;
146 compat_long_t tick;
147 compat_long_t ppsfreq;
148 compat_long_t jitter;
149 compat_int_t shift;
150 compat_long_t stabil;
151 compat_long_t jitcnt;
152 compat_long_t calcnt;
153 compat_long_t errcnt;
154 compat_long_t stbcnt;
155 compat_int_t tai;
156
157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
158 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
159 compat_int_t:32; compat_int_t:32; compat_int_t:32;
160 };
161
162 struct timex;
163 int compat_get_timex(struct timex *, const struct compat_timex __user *);
164 int compat_put_timex(struct compat_timex __user *, const struct timex *);
165
166 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
167
168 typedef struct {
169 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
170 } compat_sigset_t;
171
172 struct compat_sigaction {
173 #ifndef __ARCH_HAS_IRIX_SIGACTION
174 compat_uptr_t sa_handler;
175 compat_ulong_t sa_flags;
176 #else
177 compat_uint_t sa_flags;
178 compat_uptr_t sa_handler;
179 #endif
180 #ifdef __ARCH_HAS_SA_RESTORER
181 compat_uptr_t sa_restorer;
182 #endif
183 compat_sigset_t sa_mask __packed;
184 };
185
186 typedef union compat_sigval {
187 compat_int_t sival_int;
188 compat_uptr_t sival_ptr;
189 } compat_sigval_t;
190
191 typedef struct compat_siginfo {
192 int si_signo;
193 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
194 int si_errno;
195 int si_code;
196 #else
197 int si_code;
198 int si_errno;
199 #endif
200
201 union {
202 int _pad[128/sizeof(int) - 3];
203
204 /* kill() */
205 struct {
206 compat_pid_t _pid; /* sender's pid */
207 __compat_uid32_t _uid; /* sender's uid */
208 } _kill;
209
210 /* POSIX.1b timers */
211 struct {
212 compat_timer_t _tid; /* timer id */
213 int _overrun; /* overrun count */
214 compat_sigval_t _sigval; /* same as below */
215 } _timer;
216
217 /* POSIX.1b signals */
218 struct {
219 compat_pid_t _pid; /* sender's pid */
220 __compat_uid32_t _uid; /* sender's uid */
221 compat_sigval_t _sigval;
222 } _rt;
223
224 /* SIGCHLD */
225 struct {
226 compat_pid_t _pid; /* which child */
227 __compat_uid32_t _uid; /* sender's uid */
228 int _status; /* exit code */
229 compat_clock_t _utime;
230 compat_clock_t _stime;
231 } _sigchld;
232
233 #ifdef CONFIG_X86_X32_ABI
234 /* SIGCHLD (x32 version) */
235 struct {
236 compat_pid_t _pid; /* which child */
237 __compat_uid32_t _uid; /* sender's uid */
238 int _status; /* exit code */
239 compat_s64 _utime;
240 compat_s64 _stime;
241 } _sigchld_x32;
242 #endif
243
244 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
245 struct {
246 compat_uptr_t _addr; /* faulting insn/memory ref. */
247 #ifdef __ARCH_SI_TRAPNO
248 int _trapno; /* TRAP # which caused the signal */
249 #endif
250 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
251 sizeof(short) : __alignof__(compat_uptr_t))
252 union {
253 /*
254 * used when si_code=BUS_MCEERR_AR or
255 * used when si_code=BUS_MCEERR_AO
256 */
257 short int _addr_lsb; /* Valid LSB of the reported address. */
258 /* used when si_code=SEGV_BNDERR */
259 struct {
260 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
261 compat_uptr_t _lower;
262 compat_uptr_t _upper;
263 } _addr_bnd;
264 /* used when si_code=SEGV_PKUERR */
265 struct {
266 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
267 u32 _pkey;
268 } _addr_pkey;
269 };
270 } _sigfault;
271
272 /* SIGPOLL */
273 struct {
274 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
275 int _fd;
276 } _sigpoll;
277
278 struct {
279 compat_uptr_t _call_addr; /* calling user insn */
280 int _syscall; /* triggering system call number */
281 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
282 } _sigsys;
283 } _sifields;
284 } compat_siginfo_t;
285
286 /*
287 * These functions operate on 32- or 64-bit specs depending on
288 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
289 */
290 extern int compat_get_timespec(struct timespec *, const void __user *);
291 extern int compat_put_timespec(const struct timespec *, void __user *);
292 extern int compat_get_timeval(struct timeval *, const void __user *);
293 extern int compat_put_timeval(const struct timeval *, void __user *);
294
295 struct compat_iovec {
296 compat_uptr_t iov_base;
297 compat_size_t iov_len;
298 };
299
300 struct compat_rlimit {
301 compat_ulong_t rlim_cur;
302 compat_ulong_t rlim_max;
303 };
304
305 struct compat_rusage {
306 struct old_timeval32 ru_utime;
307 struct old_timeval32 ru_stime;
308 compat_long_t ru_maxrss;
309 compat_long_t ru_ixrss;
310 compat_long_t ru_idrss;
311 compat_long_t ru_isrss;
312 compat_long_t ru_minflt;
313 compat_long_t ru_majflt;
314 compat_long_t ru_nswap;
315 compat_long_t ru_inblock;
316 compat_long_t ru_oublock;
317 compat_long_t ru_msgsnd;
318 compat_long_t ru_msgrcv;
319 compat_long_t ru_nsignals;
320 compat_long_t ru_nvcsw;
321 compat_long_t ru_nivcsw;
322 };
323
324 extern int put_compat_rusage(const struct rusage *,
325 struct compat_rusage __user *);
326
327 struct compat_siginfo;
328 struct __compat_aio_sigset;
329
330 struct compat_dirent {
331 u32 d_ino;
332 compat_off_t d_off;
333 u16 d_reclen;
334 char d_name[256];
335 };
336
337 struct compat_ustat {
338 compat_daddr_t f_tfree;
339 compat_ino_t f_tinode;
340 char f_fname[6];
341 char f_fpack[6];
342 };
343
344 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
345
346 typedef struct compat_sigevent {
347 compat_sigval_t sigev_value;
348 compat_int_t sigev_signo;
349 compat_int_t sigev_notify;
350 union {
351 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
352 compat_int_t _tid;
353
354 struct {
355 compat_uptr_t _function;
356 compat_uptr_t _attribute;
357 } _sigev_thread;
358 } _sigev_un;
359 } compat_sigevent_t;
360
361 struct compat_ifmap {
362 compat_ulong_t mem_start;
363 compat_ulong_t mem_end;
364 unsigned short base_addr;
365 unsigned char irq;
366 unsigned char dma;
367 unsigned char port;
368 };
369
370 struct compat_if_settings {
371 unsigned int type; /* Type of physical device or protocol */
372 unsigned int size; /* Size of the data allocated by the caller */
373 compat_uptr_t ifs_ifsu; /* union of pointers */
374 };
375
376 struct compat_ifreq {
377 union {
378 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
379 } ifr_ifrn;
380 union {
381 struct sockaddr ifru_addr;
382 struct sockaddr ifru_dstaddr;
383 struct sockaddr ifru_broadaddr;
384 struct sockaddr ifru_netmask;
385 struct sockaddr ifru_hwaddr;
386 short ifru_flags;
387 compat_int_t ifru_ivalue;
388 compat_int_t ifru_mtu;
389 struct compat_ifmap ifru_map;
390 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
391 char ifru_newname[IFNAMSIZ];
392 compat_caddr_t ifru_data;
393 struct compat_if_settings ifru_settings;
394 } ifr_ifru;
395 };
396
397 struct compat_ifconf {
398 compat_int_t ifc_len; /* size of buffer */
399 compat_caddr_t ifcbuf;
400 };
401
402 struct compat_robust_list {
403 compat_uptr_t next;
404 };
405
406 struct compat_robust_list_head {
407 struct compat_robust_list list;
408 compat_long_t futex_offset;
409 compat_uptr_t list_op_pending;
410 };
411
412 #ifdef CONFIG_COMPAT_OLD_SIGACTION
413 struct compat_old_sigaction {
414 compat_uptr_t sa_handler;
415 compat_old_sigset_t sa_mask;
416 compat_ulong_t sa_flags;
417 compat_uptr_t sa_restorer;
418 };
419 #endif
420
421 struct compat_keyctl_kdf_params {
422 compat_uptr_t hashname;
423 compat_uptr_t otherinfo;
424 __u32 otherinfolen;
425 __u32 __spare[8];
426 };
427
428 struct compat_statfs;
429 struct compat_statfs64;
430 struct compat_old_linux_dirent;
431 struct compat_linux_dirent;
432 struct linux_dirent64;
433 struct compat_msghdr;
434 struct compat_mmsghdr;
435 struct compat_sysinfo;
436 struct compat_sysctl_args;
437 struct compat_kexec_segment;
438 struct compat_mq_attr;
439 struct compat_msgbuf;
440
441 extern void compat_exit_robust_list(struct task_struct *curr);
442
443 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
444
445 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
446
447 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
448 unsigned long bitmap_size);
449 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
450 unsigned long bitmap_size);
451 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
452 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
453 int get_compat_sigevent(struct sigevent *event,
454 const struct compat_sigevent __user *u_event);
455
456 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
457 struct old_timeval32 *rhs)
458 {
459 if (lhs->tv_sec < rhs->tv_sec)
460 return -1;
461 if (lhs->tv_sec > rhs->tv_sec)
462 return 1;
463 return lhs->tv_usec - rhs->tv_usec;
464 }
465
466 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
467 struct old_timespec32 *rhs)
468 {
469 if (lhs->tv_sec < rhs->tv_sec)
470 return -1;
471 if (lhs->tv_sec > rhs->tv_sec)
472 return 1;
473 return lhs->tv_nsec - rhs->tv_nsec;
474 }
475
476 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
477
478 /*
479 * Defined inline such that size can be compile time constant, which avoids
480 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
481 */
482 static inline int
483 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
484 unsigned int size)
485 {
486 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
487 #ifdef __BIG_ENDIAN
488 compat_sigset_t v;
489 switch (_NSIG_WORDS) {
490 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
491 /* fall through */
492 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
493 /* fall through */
494 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
495 /* fall through */
496 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
497 }
498 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
499 #else
500 return copy_to_user(compat, set, size) ? -EFAULT : 0;
501 #endif
502 }
503
504 extern int compat_ptrace_request(struct task_struct *child,
505 compat_long_t request,
506 compat_ulong_t addr, compat_ulong_t data);
507
508 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
509 compat_ulong_t addr, compat_ulong_t data);
510
511 struct epoll_event; /* fortunately, this one is fixed-layout */
512
513 extern ssize_t compat_rw_copy_check_uvector(int type,
514 const struct compat_iovec __user *uvector,
515 unsigned long nr_segs,
516 unsigned long fast_segs, struct iovec *fast_pointer,
517 struct iovec **ret_pointer);
518
519 extern void __user *compat_alloc_user_space(unsigned long len);
520
521 int compat_restore_altstack(const compat_stack_t __user *uss);
522 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
523 #define compat_save_altstack_ex(uss, sp) do { \
524 compat_stack_t __user *__uss = uss; \
525 struct task_struct *t = current; \
526 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
527 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
528 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
529 if (t->sas_ss_flags & SS_AUTODISARM) \
530 sas_ss_reset(t); \
531 } while (0);
532
533 /*
534 * These syscall function prototypes are kept in the same order as
535 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
536 * go below.
537 *
538 * Please note that these prototypes here are only provided for information
539 * purposes, for static analysis, and for linking from the syscall table.
540 * These functions should not be called elsewhere from kernel code.
541 *
542 * As the syscall calling convention may be different from the default
543 * for architectures overriding the syscall calling convention, do not
544 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
545 */
546 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
547 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
548 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
549 u32 __user *iocb);
550 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
551 compat_long_t min_nr,
552 compat_long_t nr,
553 struct io_event __user *events,
554 struct old_timespec32 __user *timeout);
555 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
556 compat_long_t min_nr,
557 compat_long_t nr,
558 struct io_event __user *events,
559 struct old_timespec32 __user *timeout,
560 const struct __compat_aio_sigset __user *usig);
561
562 /* fs/cookies.c */
563 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
564
565 /* fs/eventpoll.c */
566 asmlinkage long compat_sys_epoll_pwait(int epfd,
567 struct epoll_event __user *events,
568 int maxevents, int timeout,
569 const compat_sigset_t __user *sigmask,
570 compat_size_t sigsetsize);
571
572 /* fs/fcntl.c */
573 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
574 compat_ulong_t arg);
575 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
576 compat_ulong_t arg);
577
578 /* fs/ioctl.c */
579 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
580 compat_ulong_t arg);
581
582 /* fs/namespace.c */
583 asmlinkage long compat_sys_mount(const char __user *dev_name,
584 const char __user *dir_name,
585 const char __user *type, compat_ulong_t flags,
586 const void __user *data);
587
588 /* fs/open.c */
589 asmlinkage long compat_sys_statfs(const char __user *pathname,
590 struct compat_statfs __user *buf);
591 asmlinkage long compat_sys_statfs64(const char __user *pathname,
592 compat_size_t sz,
593 struct compat_statfs64 __user *buf);
594 asmlinkage long compat_sys_fstatfs(unsigned int fd,
595 struct compat_statfs __user *buf);
596 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
597 struct compat_statfs64 __user *buf);
598 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
599 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
600 /* No generic prototype for truncate64, ftruncate64, fallocate */
601 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
602 int flags, umode_t mode);
603
604 /* fs/readdir.c */
605 asmlinkage long compat_sys_getdents(unsigned int fd,
606 struct compat_linux_dirent __user *dirent,
607 unsigned int count);
608
609 /* fs/read_write.c */
610 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
611 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
612 const struct compat_iovec __user *vec, compat_ulong_t vlen);
613 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
614 const struct compat_iovec __user *vec, compat_ulong_t vlen);
615 /* No generic prototype for pread64 and pwrite64 */
616 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
617 const struct compat_iovec __user *vec,
618 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
619 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
620 const struct compat_iovec __user *vec,
621 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
622 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
623 asmlinkage long compat_sys_preadv64(unsigned long fd,
624 const struct compat_iovec __user *vec,
625 unsigned long vlen, loff_t pos);
626 #endif
627
628 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
629 asmlinkage long compat_sys_pwritev64(unsigned long fd,
630 const struct compat_iovec __user *vec,
631 unsigned long vlen, loff_t pos);
632 #endif
633
634 /* fs/sendfile.c */
635 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
636 compat_off_t __user *offset, compat_size_t count);
637 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
638 compat_loff_t __user *offset, compat_size_t count);
639
640 /* fs/select.c */
641 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
642 compat_ulong_t __user *outp,
643 compat_ulong_t __user *exp,
644 struct old_timespec32 __user *tsp,
645 void __user *sig);
646 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
647 unsigned int nfds,
648 struct old_timespec32 __user *tsp,
649 const compat_sigset_t __user *sigmask,
650 compat_size_t sigsetsize);
651
652 /* fs/signalfd.c */
653 asmlinkage long compat_sys_signalfd4(int ufd,
654 const compat_sigset_t __user *sigmask,
655 compat_size_t sigsetsize, int flags);
656
657 /* fs/splice.c */
658 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
659 unsigned int nr_segs, unsigned int flags);
660
661 /* fs/stat.c */
662 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
663 const char __user *filename,
664 struct compat_stat __user *statbuf,
665 int flag);
666 asmlinkage long compat_sys_newfstat(unsigned int fd,
667 struct compat_stat __user *statbuf);
668
669 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
670
671 /* fs/timerfd.c */
672 asmlinkage long compat_sys_timerfd_gettime(int ufd,
673 struct old_itimerspec32 __user *otmr);
674 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
675 const struct old_itimerspec32 __user *utmr,
676 struct old_itimerspec32 __user *otmr);
677
678 /* fs/utimes.c */
679 asmlinkage long compat_sys_utimensat(unsigned int dfd,
680 const char __user *filename,
681 struct old_timespec32 __user *t,
682 int flags);
683
684 /* kernel/exit.c */
685 asmlinkage long compat_sys_waitid(int, compat_pid_t,
686 struct compat_siginfo __user *, int,
687 struct compat_rusage __user *);
688
689
690
691 /* kernel/futex.c */
692 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
693 struct old_timespec32 __user *utime, u32 __user *uaddr2,
694 u32 val3);
695 asmlinkage long
696 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
697 compat_size_t len);
698 asmlinkage long
699 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
700 compat_size_t __user *len_ptr);
701
702 /* kernel/hrtimer.c */
703 asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
704 struct old_timespec32 __user *rmtp);
705
706 /* kernel/itimer.c */
707 asmlinkage long compat_sys_getitimer(int which,
708 struct compat_itimerval __user *it);
709 asmlinkage long compat_sys_setitimer(int which,
710 struct compat_itimerval __user *in,
711 struct compat_itimerval __user *out);
712
713 /* kernel/kexec.c */
714 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
715 compat_ulong_t nr_segments,
716 struct compat_kexec_segment __user *,
717 compat_ulong_t flags);
718
719 /* kernel/posix-timers.c */
720 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
721 struct compat_sigevent __user *timer_event_spec,
722 timer_t __user *created_timer_id);
723 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
724 struct old_itimerspec32 __user *setting);
725 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
726 struct old_itimerspec32 __user *new,
727 struct old_itimerspec32 __user *old);
728 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
729 struct old_timespec32 __user *tp);
730 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
731 struct old_timespec32 __user *tp);
732 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
733 struct old_timespec32 __user *tp);
734 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
735 struct old_timespec32 __user *rqtp,
736 struct old_timespec32 __user *rmtp);
737
738 /* kernel/ptrace.c */
739 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
740 compat_long_t addr, compat_long_t data);
741
742 /* kernel/sched/core.c */
743 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
744 unsigned int len,
745 compat_ulong_t __user *user_mask_ptr);
746 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
747 unsigned int len,
748 compat_ulong_t __user *user_mask_ptr);
749 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
750 struct old_timespec32 __user *interval);
751
752 /* kernel/signal.c */
753 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
754 compat_stack_t __user *uoss_ptr);
755 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
756 compat_size_t sigsetsize);
757 #ifndef CONFIG_ODD_RT_SIGACTION
758 asmlinkage long compat_sys_rt_sigaction(int,
759 const struct compat_sigaction __user *,
760 struct compat_sigaction __user *,
761 compat_size_t);
762 #endif
763 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
764 compat_sigset_t __user *oset,
765 compat_size_t sigsetsize);
766 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
767 compat_size_t sigsetsize);
768 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
769 struct compat_siginfo __user *uinfo,
770 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
771 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
772 struct compat_siginfo __user *uinfo);
773 /* No generic prototype for rt_sigreturn */
774
775 /* kernel/sys.c */
776 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
777 asmlinkage long compat_sys_getrlimit(unsigned int resource,
778 struct compat_rlimit __user *rlim);
779 asmlinkage long compat_sys_setrlimit(unsigned int resource,
780 struct compat_rlimit __user *rlim);
781 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
782
783 /* kernel/time.c */
784 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
785 struct timezone __user *tz);
786 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
787 struct timezone __user *tz);
788 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
789
790 /* kernel/timer.c */
791 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
792
793 /* ipc/mqueue.c */
794 asmlinkage long compat_sys_mq_open(const char __user *u_name,
795 int oflag, compat_mode_t mode,
796 struct compat_mq_attr __user *u_attr);
797 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
798 const char __user *u_msg_ptr,
799 compat_size_t msg_len, unsigned int msg_prio,
800 const struct old_timespec32 __user *u_abs_timeout);
801 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
802 char __user *u_msg_ptr,
803 compat_size_t msg_len, unsigned int __user *u_msg_prio,
804 const struct old_timespec32 __user *u_abs_timeout);
805 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
806 const struct compat_sigevent __user *u_notification);
807 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
808 const struct compat_mq_attr __user *u_mqstat,
809 struct compat_mq_attr __user *u_omqstat);
810
811 /* ipc/msg.c */
812 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
813 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
814 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
815 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
816 compat_ssize_t msgsz, int msgflg);
817
818 /* ipc/sem.c */
819 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
820 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
821 unsigned nsems, const struct old_timespec32 __user *timeout);
822
823 /* ipc/shm.c */
824 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
825 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
826
827 /* net/socket.c */
828 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
829 unsigned flags, struct sockaddr __user *addr,
830 int __user *addrlen);
831 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
832 char __user *optval, unsigned int optlen);
833 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
834 char __user *optval, int __user *optlen);
835 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
836 unsigned flags);
837 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
838 unsigned int flags);
839
840 /* mm/filemap.c: No generic prototype for readahead */
841
842 /* security/keys/keyctl.c */
843 asmlinkage long compat_sys_keyctl(u32 option,
844 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
845
846 /* arch/example/kernel/sys_example.c */
847 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
848 const compat_uptr_t __user *envp);
849
850 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
851
852 /* mm/, CONFIG_MMU only */
853 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
854 compat_ulong_t mode,
855 compat_ulong_t __user *nmask,
856 compat_ulong_t maxnode, compat_ulong_t flags);
857 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
858 compat_ulong_t __user *nmask,
859 compat_ulong_t maxnode,
860 compat_ulong_t addr,
861 compat_ulong_t flags);
862 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
863 compat_ulong_t maxnode);
864 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
865 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
866 const compat_ulong_t __user *new_nodes);
867 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
868 __u32 __user *pages,
869 const int __user *nodes,
870 int __user *status,
871 int flags);
872
873 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
874 compat_pid_t pid, int sig,
875 struct compat_siginfo __user *uinfo);
876 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
877 unsigned vlen, unsigned int flags,
878 struct old_timespec32 __user *timeout);
879 asmlinkage long compat_sys_wait4(compat_pid_t pid,
880 compat_uint_t __user *stat_addr, int options,
881 struct compat_rusage __user *ru);
882 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
883 int, const char __user *);
884 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
885 struct file_handle __user *handle,
886 int flags);
887 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
888 struct compat_timex __user *tp);
889 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
890 unsigned vlen, unsigned int flags);
891 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
892 const struct compat_iovec __user *lvec,
893 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
894 compat_ulong_t riovcnt, compat_ulong_t flags);
895 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
896 const struct compat_iovec __user *lvec,
897 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
898 compat_ulong_t riovcnt, compat_ulong_t flags);
899 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
900 const compat_uptr_t __user *argv,
901 const compat_uptr_t __user *envp, int flags);
902 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
903 const struct compat_iovec __user *vec,
904 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
905 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
906 const struct compat_iovec __user *vec,
907 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
908 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
909 asmlinkage long compat_sys_readv64v2(unsigned long fd,
910 const struct compat_iovec __user *vec,
911 unsigned long vlen, loff_t pos, rwf_t flags);
912 #endif
913
914 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
915 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
916 const struct compat_iovec __user *vec,
917 unsigned long vlen, loff_t pos, rwf_t flags);
918 #endif
919
920
921 /*
922 * Deprecated system calls which are still defined in
923 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
924 */
925
926 /* __ARCH_WANT_SYSCALL_NO_AT */
927 asmlinkage long compat_sys_open(const char __user *filename, int flags,
928 umode_t mode);
929 asmlinkage long compat_sys_utimes(const char __user *filename,
930 struct old_timeval32 __user *t);
931
932 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
933 asmlinkage long compat_sys_signalfd(int ufd,
934 const compat_sigset_t __user *sigmask,
935 compat_size_t sigsetsize);
936
937 /* __ARCH_WANT_SYSCALL_OFF_T */
938 asmlinkage long compat_sys_newstat(const char __user *filename,
939 struct compat_stat __user *statbuf);
940 asmlinkage long compat_sys_newlstat(const char __user *filename,
941 struct compat_stat __user *statbuf);
942
943 /* __ARCH_WANT_SYSCALL_DEPRECATED */
944 asmlinkage long compat_sys_time(old_time32_t __user *tloc);
945 asmlinkage long compat_sys_utime(const char __user *filename,
946 struct old_utimbuf32 __user *t);
947 asmlinkage long compat_sys_futimesat(unsigned int dfd,
948 const char __user *filename,
949 struct old_timeval32 __user *t);
950 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
951 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
952 struct old_timeval32 __user *tvp);
953 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
954 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
955 unsigned flags);
956 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
957
958 /* obsolete: fs/readdir.c */
959 asmlinkage long compat_sys_old_readdir(unsigned int fd,
960 struct compat_old_linux_dirent __user *,
961 unsigned int count);
962
963 /* obsolete: fs/select.c */
964 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
965
966 /* obsolete: ipc */
967 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
968
969 /* obsolete: kernel/signal.c */
970 #ifdef __ARCH_WANT_SYS_SIGPENDING
971 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
972 #endif
973
974 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
975 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
976 compat_old_sigset_t __user *oset);
977 #endif
978 #ifdef CONFIG_COMPAT_OLD_SIGACTION
979 asmlinkage long compat_sys_sigaction(int sig,
980 const struct compat_old_sigaction __user *act,
981 struct compat_old_sigaction __user *oact);
982 #endif
983
984 /* obsolete: kernel/time/time.c */
985 asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
986
987 /* obsolete: net/socket.c */
988 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
989
990 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
991
992
993 /*
994 * For most but not all architectures, "am I in a compat syscall?" and
995 * "am I a compat task?" are the same question. For architectures on which
996 * they aren't the same question, arch code can override in_compat_syscall.
997 */
998
999 #ifndef in_compat_syscall
1000 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1001 #endif
1002
1003 /**
1004 * ns_to_old_timeval32 - Compat version of ns_to_timeval
1005 * @nsec: the nanoseconds value to be converted
1006 *
1007 * Returns the old_timeval32 representation of the nsec parameter.
1008 */
1009 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
1010 {
1011 struct timeval tv;
1012 struct old_timeval32 ctv;
1013
1014 tv = ns_to_timeval(nsec);
1015 ctv.tv_sec = tv.tv_sec;
1016 ctv.tv_usec = tv.tv_usec;
1017
1018 return ctv;
1019 }
1020
1021 /*
1022 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1023 * directly. Instead, use one of the functions which work equivalently, such
1024 * as the kcompat_sys_xyzyyz() functions prototyped below.
1025 */
1026
1027 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1028 struct compat_statfs64 __user * buf);
1029 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1030 struct compat_statfs64 __user * buf);
1031
1032 #else /* !CONFIG_COMPAT */
1033
1034 #define is_compat_task() (0)
1035 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
1036 #define in_compat_syscall in_compat_syscall
1037 static inline bool in_compat_syscall(void) { return false; }
1038
1039 #endif /* CONFIG_COMPAT */
1040
1041 #endif /* _LINUX_COMPAT_H */
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