Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S390 version |
a53c8fab | 3 | * Copyright IBM Corp. 2000 |
1da177e4 LT |
4 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), |
5 | * Gerhard Tonn (ton@de.ibm.com) | |
6 | * Thomas Spatzier (tspat@de.ibm.com) | |
7 | * | |
8 | * Conversion between 31bit and 64bit native syscalls. | |
9 | * | |
10 | * Heavily inspired by the 32-bit Sparc compat code which is | |
11 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
12 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
13 | * | |
14 | */ | |
15 | ||
16 | ||
1da177e4 LT |
17 | #include <linux/kernel.h> |
18 | #include <linux/sched.h> | |
19 | #include <linux/fs.h> | |
20 | #include <linux/mm.h> | |
21 | #include <linux/file.h> | |
22 | #include <linux/signal.h> | |
23 | #include <linux/resource.h> | |
24 | #include <linux/times.h> | |
1da177e4 | 25 | #include <linux/smp.h> |
1da177e4 LT |
26 | #include <linux/sem.h> |
27 | #include <linux/msg.h> | |
28 | #include <linux/shm.h> | |
1da177e4 | 29 | #include <linux/uio.h> |
1da177e4 LT |
30 | #include <linux/quota.h> |
31 | #include <linux/module.h> | |
1da177e4 LT |
32 | #include <linux/poll.h> |
33 | #include <linux/personality.h> | |
34 | #include <linux/stat.h> | |
35 | #include <linux/filter.h> | |
36 | #include <linux/highmem.h> | |
37 | #include <linux/highuid.h> | |
38 | #include <linux/mman.h> | |
39 | #include <linux/ipv6.h> | |
40 | #include <linux/in.h> | |
41 | #include <linux/icmpv6.h> | |
42 | #include <linux/syscalls.h> | |
43 | #include <linux/sysctl.h> | |
44 | #include <linux/binfmts.h> | |
a9415644 | 45 | #include <linux/capability.h> |
1da177e4 LT |
46 | #include <linux/compat.h> |
47 | #include <linux/vfs.h> | |
48 | #include <linux/ptrace.h> | |
068e1b94 | 49 | #include <linux/fadvise.h> |
cba4fbbf | 50 | #include <linux/ipc.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
1da177e4 LT |
52 | |
53 | #include <asm/types.h> | |
1da177e4 | 54 | #include <asm/uaccess.h> |
1da177e4 LT |
55 | |
56 | #include <net/scm.h> | |
57 | #include <net/sock.h> | |
58 | ||
59 | #include "compat_linux.h" | |
60 | ||
1da177e4 LT |
61 | /* For this source file, we want overflow handling. */ |
62 | ||
63 | #undef high2lowuid | |
64 | #undef high2lowgid | |
65 | #undef low2highuid | |
66 | #undef low2highgid | |
67 | #undef SET_UID16 | |
68 | #undef SET_GID16 | |
69 | #undef NEW_TO_OLD_UID | |
70 | #undef NEW_TO_OLD_GID | |
71 | #undef SET_OLDSTAT_UID | |
72 | #undef SET_OLDSTAT_GID | |
73 | #undef SET_STAT_UID | |
74 | #undef SET_STAT_GID | |
75 | ||
76 | #define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid) | |
77 | #define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid) | |
78 | #define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid) | |
79 | #define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid) | |
80 | #define SET_UID16(var, uid) var = high2lowuid(uid) | |
81 | #define SET_GID16(var, gid) var = high2lowgid(gid) | |
82 | #define NEW_TO_OLD_UID(uid) high2lowuid(uid) | |
83 | #define NEW_TO_OLD_GID(gid) high2lowgid(gid) | |
84 | #define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
85 | #define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
86 | #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid) | |
87 | #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid) | |
88 | ||
c6c0f58f HC |
89 | COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename, |
90 | u16, user, u16, group) | |
1da177e4 LT |
91 | { |
92 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
93 | } | |
94 | ||
c6c0f58f HC |
95 | COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *, |
96 | filename, u16, user, u16, group) | |
1da177e4 LT |
97 | { |
98 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
99 | } | |
100 | ||
c6c0f58f | 101 | COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group) |
1da177e4 LT |
102 | { |
103 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
104 | } | |
105 | ||
c6c0f58f | 106 | COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid) |
1da177e4 LT |
107 | { |
108 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
109 | } | |
110 | ||
c6c0f58f | 111 | COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid) |
1da177e4 LT |
112 | { |
113 | return sys_setgid((gid_t)gid); | |
114 | } | |
115 | ||
208096ee | 116 | COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid) |
1da177e4 LT |
117 | { |
118 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
119 | } | |
120 | ||
208096ee | 121 | COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid) |
1da177e4 LT |
122 | { |
123 | return sys_setuid((uid_t)uid); | |
124 | } | |
125 | ||
208096ee | 126 | COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid) |
1da177e4 LT |
127 | { |
128 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
208096ee | 129 | low2highuid(suid)); |
1da177e4 LT |
130 | } |
131 | ||
208096ee HC |
132 | COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp, |
133 | u16 __user *, euidp, u16 __user *, suidp) | |
1da177e4 | 134 | { |
558a4479 | 135 | const struct cred *cred = current_cred(); |
1da177e4 | 136 | int retval; |
558a4479 | 137 | u16 ruid, euid, suid; |
1da177e4 | 138 | |
558a4479 EB |
139 | ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid)); |
140 | euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid)); | |
141 | suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid)); | |
142 | ||
143 | if (!(retval = put_user(ruid, ruidp)) && | |
144 | !(retval = put_user(euid, euidp))) | |
145 | retval = put_user(suid, suidp); | |
1da177e4 LT |
146 | |
147 | return retval; | |
148 | } | |
149 | ||
208096ee | 150 | COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid) |
1da177e4 LT |
151 | { |
152 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
208096ee | 153 | low2highgid(sgid)); |
1da177e4 LT |
154 | } |
155 | ||
4ca2ea58 HC |
156 | COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp, |
157 | u16 __user *, egidp, u16 __user *, sgidp) | |
1da177e4 | 158 | { |
558a4479 | 159 | const struct cred *cred = current_cred(); |
1da177e4 | 160 | int retval; |
558a4479 EB |
161 | u16 rgid, egid, sgid; |
162 | ||
163 | rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid)); | |
164 | egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid)); | |
165 | sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid)); | |
1da177e4 | 166 | |
558a4479 EB |
167 | if (!(retval = put_user(rgid, rgidp)) && |
168 | !(retval = put_user(egid, egidp))) | |
169 | retval = put_user(sgid, sgidp); | |
1da177e4 LT |
170 | |
171 | return retval; | |
172 | } | |
173 | ||
4ca2ea58 | 174 | COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid) |
1da177e4 LT |
175 | { |
176 | return sys_setfsuid((uid_t)uid); | |
177 | } | |
178 | ||
4ca2ea58 | 179 | COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid) |
1da177e4 LT |
180 | { |
181 | return sys_setfsgid((gid_t)gid); | |
182 | } | |
183 | ||
24954a14 | 184 | static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info) |
1da177e4 | 185 | { |
ae2975bc | 186 | struct user_namespace *user_ns = current_user_ns(); |
1da177e4 LT |
187 | int i; |
188 | u16 group; | |
ae2975bc | 189 | kgid_t kgid; |
1da177e4 LT |
190 | |
191 | for (i = 0; i < group_info->ngroups; i++) { | |
ae2975bc EB |
192 | kgid = GROUP_AT(group_info, i); |
193 | group = (u16)from_kgid_munged(user_ns, kgid); | |
1da177e4 LT |
194 | if (put_user(group, grouplist+i)) |
195 | return -EFAULT; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
24954a14 | 201 | static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist) |
1da177e4 | 202 | { |
ae2975bc | 203 | struct user_namespace *user_ns = current_user_ns(); |
1da177e4 LT |
204 | int i; |
205 | u16 group; | |
ae2975bc | 206 | kgid_t kgid; |
1da177e4 LT |
207 | |
208 | for (i = 0; i < group_info->ngroups; i++) { | |
209 | if (get_user(group, grouplist+i)) | |
210 | return -EFAULT; | |
ae2975bc EB |
211 | |
212 | kgid = make_kgid(user_ns, (gid_t)group); | |
213 | if (!gid_valid(kgid)) | |
214 | return -EINVAL; | |
215 | ||
216 | GROUP_AT(group_info, i) = kgid; | |
1da177e4 LT |
217 | } |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
4ca2ea58 | 222 | COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist) |
1da177e4 | 223 | { |
2ec7f4ae | 224 | const struct cred *cred = current_cred(); |
1da177e4 LT |
225 | int i; |
226 | ||
227 | if (gidsetsize < 0) | |
228 | return -EINVAL; | |
229 | ||
2ec7f4ae HC |
230 | get_group_info(cred->group_info); |
231 | i = cred->group_info->ngroups; | |
1da177e4 LT |
232 | if (gidsetsize) { |
233 | if (i > gidsetsize) { | |
234 | i = -EINVAL; | |
235 | goto out; | |
236 | } | |
2ec7f4ae | 237 | if (groups16_to_user(grouplist, cred->group_info)) { |
1da177e4 LT |
238 | i = -EFAULT; |
239 | goto out; | |
240 | } | |
241 | } | |
242 | out: | |
2ec7f4ae | 243 | put_group_info(cred->group_info); |
1da177e4 LT |
244 | return i; |
245 | } | |
246 | ||
4ca2ea58 | 247 | COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist) |
1da177e4 LT |
248 | { |
249 | struct group_info *group_info; | |
250 | int retval; | |
251 | ||
252 | if (!capable(CAP_SETGID)) | |
253 | return -EPERM; | |
254 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
255 | return -EINVAL; | |
256 | ||
257 | group_info = groups_alloc(gidsetsize); | |
258 | if (!group_info) | |
259 | return -ENOMEM; | |
260 | retval = groups16_from_user(group_info, grouplist); | |
261 | if (retval) { | |
262 | put_group_info(group_info); | |
263 | return retval; | |
264 | } | |
265 | ||
266 | retval = set_current_groups(group_info); | |
267 | put_group_info(group_info); | |
268 | ||
269 | return retval; | |
270 | } | |
271 | ||
e723e0cc | 272 | COMPAT_SYSCALL_DEFINE0(s390_getuid16) |
1da177e4 | 273 | { |
558a4479 | 274 | return high2lowuid(from_kuid_munged(current_user_ns(), current_uid())); |
1da177e4 LT |
275 | } |
276 | ||
e723e0cc | 277 | COMPAT_SYSCALL_DEFINE0(s390_geteuid16) |
1da177e4 | 278 | { |
558a4479 | 279 | return high2lowuid(from_kuid_munged(current_user_ns(), current_euid())); |
1da177e4 LT |
280 | } |
281 | ||
e723e0cc | 282 | COMPAT_SYSCALL_DEFINE0(s390_getgid16) |
1da177e4 | 283 | { |
558a4479 | 284 | return high2lowgid(from_kgid_munged(current_user_ns(), current_gid())); |
1da177e4 LT |
285 | } |
286 | ||
e723e0cc | 287 | COMPAT_SYSCALL_DEFINE0(s390_getegid16) |
1da177e4 | 288 | { |
558a4479 | 289 | return high2lowgid(from_kgid_munged(current_user_ns(), current_egid())); |
1da177e4 LT |
290 | } |
291 | ||
1df23957 | 292 | #ifdef CONFIG_SYSVIPC |
49382d93 HC |
293 | COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second, |
294 | compat_ulong_t, third, compat_uptr_t, ptr) | |
1da177e4 LT |
295 | { |
296 | if (call >> 16) /* hack for backward compatibility */ | |
297 | return -EINVAL; | |
56e41d3c | 298 | return compat_sys_ipc(call, first, second, third, ptr, third); |
1da177e4 | 299 | } |
1df23957 | 300 | #endif |
1da177e4 | 301 | |
e723e0cc | 302 | COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low) |
1da177e4 | 303 | { |
e723e0cc | 304 | return sys_truncate(path, (unsigned long)high << 32 | low); |
1da177e4 LT |
305 | } |
306 | ||
52a0b536 | 307 | COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low) |
1da177e4 | 308 | { |
52a0b536 | 309 | return sys_ftruncate(fd, (unsigned long)high << 32 | low); |
1da177e4 LT |
310 | } |
311 | ||
52a0b536 HC |
312 | COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf, |
313 | compat_size_t, count, u32, high, u32, low) | |
1da177e4 LT |
314 | { |
315 | if ((compat_ssize_t) count < 0) | |
316 | return -EINVAL; | |
52a0b536 | 317 | return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low); |
1da177e4 LT |
318 | } |
319 | ||
52a0b536 HC |
320 | COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf, |
321 | compat_size_t, count, u32, high, u32, low) | |
1da177e4 LT |
322 | { |
323 | if ((compat_ssize_t) count < 0) | |
324 | return -EINVAL; | |
52a0b536 | 325 | return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low); |
1da177e4 LT |
326 | } |
327 | ||
52a0b536 | 328 | COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count) |
1da177e4 | 329 | { |
52a0b536 | 330 | return sys_readahead(fd, (unsigned long)high << 32 | low, count); |
1da177e4 LT |
331 | } |
332 | ||
1da177e4 LT |
333 | struct stat64_emu31 { |
334 | unsigned long long st_dev; | |
335 | unsigned int __pad1; | |
336 | #define STAT64_HAS_BROKEN_ST_INO 1 | |
337 | u32 __st_ino; | |
338 | unsigned int st_mode; | |
339 | unsigned int st_nlink; | |
340 | u32 st_uid; | |
341 | u32 st_gid; | |
342 | unsigned long long st_rdev; | |
343 | unsigned int __pad3; | |
344 | long st_size; | |
345 | u32 st_blksize; | |
346 | unsigned char __pad4[4]; | |
347 | u32 __pad5; /* future possible st_blocks high bits */ | |
348 | u32 st_blocks; /* Number 512-byte blocks allocated. */ | |
349 | u32 st_atime; | |
350 | u32 __pad6; | |
351 | u32 st_mtime; | |
352 | u32 __pad7; | |
353 | u32 st_ctime; | |
354 | u32 __pad8; /* will be high 32 bits of ctime someday */ | |
355 | unsigned long st_ino; | |
356 | }; | |
357 | ||
24954a14 | 358 | static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
1da177e4 LT |
359 | { |
360 | struct stat64_emu31 tmp; | |
361 | ||
362 | memset(&tmp, 0, sizeof(tmp)); | |
363 | ||
364 | tmp.st_dev = huge_encode_dev(stat->dev); | |
365 | tmp.st_ino = stat->ino; | |
366 | tmp.__st_ino = (u32)stat->ino; | |
367 | tmp.st_mode = stat->mode; | |
368 | tmp.st_nlink = (unsigned int)stat->nlink; | |
a7c1938e EB |
369 | tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid); |
370 | tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid); | |
1da177e4 LT |
371 | tmp.st_rdev = huge_encode_dev(stat->rdev); |
372 | tmp.st_size = stat->size; | |
373 | tmp.st_blksize = (u32)stat->blksize; | |
374 | tmp.st_blocks = (u32)stat->blocks; | |
375 | tmp.st_atime = (u32)stat->atime.tv_sec; | |
376 | tmp.st_mtime = (u32)stat->mtime.tv_sec; | |
377 | tmp.st_ctime = (u32)stat->ctime.tv_sec; | |
378 | ||
379 | return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
380 | } | |
381 | ||
52a0b536 | 382 | COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf) |
1da177e4 LT |
383 | { |
384 | struct kstat stat; | |
385 | int ret = vfs_stat(filename, &stat); | |
386 | if (!ret) | |
387 | ret = cp_stat64(statbuf, &stat); | |
388 | return ret; | |
389 | } | |
390 | ||
a0f8c6da | 391 | COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf) |
1da177e4 LT |
392 | { |
393 | struct kstat stat; | |
394 | int ret = vfs_lstat(filename, &stat); | |
395 | if (!ret) | |
396 | ret = cp_stat64(statbuf, &stat); | |
397 | return ret; | |
398 | } | |
399 | ||
a0f8c6da | 400 | COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf) |
1da177e4 LT |
401 | { |
402 | struct kstat stat; | |
403 | int ret = vfs_fstat(fd, &stat); | |
404 | if (!ret) | |
405 | ret = cp_stat64(statbuf, &stat); | |
406 | return ret; | |
407 | } | |
408 | ||
a0f8c6da HC |
409 | COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename, |
410 | struct stat64_emu31 __user *, statbuf, int, flag) | |
19bf9cbf HC |
411 | { |
412 | struct kstat stat; | |
0112fc22 | 413 | int error; |
19bf9cbf | 414 | |
0112fc22 OD |
415 | error = vfs_fstatat(dfd, filename, &stat, flag); |
416 | if (error) | |
417 | return error; | |
418 | return cp_stat64(statbuf, &stat); | |
19bf9cbf HC |
419 | } |
420 | ||
1da177e4 LT |
421 | /* |
422 | * Linux/i386 didn't use to be able to handle more than | |
423 | * 4 system call parameters, so these system calls used a memory | |
424 | * block for parameter passing.. | |
425 | */ | |
426 | ||
427 | struct mmap_arg_struct_emu31 { | |
d3815898 HC |
428 | compat_ulong_t addr; |
429 | compat_ulong_t len; | |
430 | compat_ulong_t prot; | |
431 | compat_ulong_t flags; | |
432 | compat_ulong_t fd; | |
433 | compat_ulong_t offset; | |
1da177e4 LT |
434 | }; |
435 | ||
a0f8c6da | 436 | COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg) |
1da177e4 LT |
437 | { |
438 | struct mmap_arg_struct_emu31 a; | |
1da177e4 LT |
439 | |
440 | if (copy_from_user(&a, arg, sizeof(a))) | |
d3815898 | 441 | return -EFAULT; |
1da177e4 | 442 | if (a.offset & ~PAGE_MASK) |
d3815898 | 443 | return -EINVAL; |
d3815898 HC |
444 | return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, |
445 | a.offset >> PAGE_SHIFT); | |
1da177e4 LT |
446 | } |
447 | ||
a0f8c6da | 448 | COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg) |
1da177e4 LT |
449 | { |
450 | struct mmap_arg_struct_emu31 a; | |
1da177e4 LT |
451 | |
452 | if (copy_from_user(&a, arg, sizeof(a))) | |
d3815898 | 453 | return -EFAULT; |
d3815898 | 454 | return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); |
1da177e4 LT |
455 | } |
456 | ||
5383d2c8 | 457 | COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count) |
1da177e4 LT |
458 | { |
459 | if ((compat_ssize_t) count < 0) | |
460 | return -EINVAL; | |
461 | ||
462 | return sys_read(fd, buf, count); | |
463 | } | |
464 | ||
5383d2c8 | 465 | COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count) |
1da177e4 LT |
466 | { |
467 | if ((compat_ssize_t) count < 0) | |
468 | return -EINVAL; | |
469 | ||
470 | return sys_write(fd, buf, count); | |
471 | } | |
472 | ||
068e1b94 MS |
473 | /* |
474 | * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. | |
475 | * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} | |
476 | * because the 31 bit values differ from the 64 bit values. | |
477 | */ | |
478 | ||
5383d2c8 | 479 | COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise) |
068e1b94 MS |
480 | { |
481 | if (advise == 4) | |
482 | advise = POSIX_FADV_DONTNEED; | |
483 | else if (advise == 5) | |
484 | advise = POSIX_FADV_NOREUSE; | |
5383d2c8 | 485 | return sys_fadvise64(fd, (unsigned long)high << 32 | low, len, advise); |
068e1b94 MS |
486 | } |
487 | ||
488 | struct fadvise64_64_args { | |
489 | int fd; | |
490 | long long offset; | |
491 | long long len; | |
492 | int advice; | |
493 | }; | |
494 | ||
5383d2c8 | 495 | COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args) |
068e1b94 MS |
496 | { |
497 | struct fadvise64_64_args a; | |
498 | ||
499 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
500 | return -EFAULT; | |
501 | if (a.advice == 4) | |
502 | a.advice = POSIX_FADV_DONTNEED; | |
503 | else if (a.advice == 5) | |
504 | a.advice = POSIX_FADV_NOREUSE; | |
505 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
506 | } | |
2c81fc4f HC |
507 | |
508 | COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow, | |
509 | u32, nhigh, u32, nlow, unsigned int, flags) | |
510 | { | |
511 | return sys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow, | |
512 | ((u64)nhigh << 32) + nlow, flags); | |
513 | } | |
514 | ||
515 | COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow, | |
516 | u32, lenhigh, u32, lenlow) | |
517 | { | |
518 | return sys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow, | |
519 | ((u64)lenhigh << 32) + lenlow); | |
520 | } |