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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * S390 version
4 * Copyright IBM Corp. 2000
5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
6 * Gerhard Tonn (ton@de.ibm.com)
7 * Thomas Spatzier (tspat@de.ibm.com)
8 *
9 * Conversion between 31bit and 64bit native syscalls.
10 *
11 * Heavily inspired by the 32-bit Sparc compat code which is
12 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
13 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
14 *
15 */
16
17
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/fs.h>
21#include <linux/mm.h>
22#include <linux/file.h>
23#include <linux/signal.h>
24#include <linux/resource.h>
25#include <linux/times.h>
26#include <linux/smp.h>
27#include <linux/sem.h>
28#include <linux/msg.h>
29#include <linux/shm.h>
30#include <linux/uio.h>
31#include <linux/quota.h>
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/mman.h>
38#include <linux/ipv6.h>
39#include <linux/in.h>
40#include <linux/icmpv6.h>
41#include <linux/syscalls.h>
42#include <linux/sysctl.h>
43#include <linux/binfmts.h>
44#include <linux/capability.h>
45#include <linux/compat.h>
46#include <linux/vfs.h>
47#include <linux/ptrace.h>
48#include <linux/fadvise.h>
49#include <linux/ipc.h>
50#include <linux/slab.h>
51
52#include <asm/types.h>
53#include <linux/uaccess.h>
54
55#include <net/scm.h>
56#include <net/sock.h>
57
58#include "compat_linux.h"
59
60#ifdef CONFIG_SYSVIPC
61COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
62 compat_ulong_t, third, compat_uptr_t, ptr)
63{
64 if (call >> 16) /* hack for backward compatibility */
65 return -EINVAL;
66 return compat_ksys_ipc(call, first, second, third, ptr, third);
67}
68#endif
69
70COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low)
71{
72 return ksys_truncate(path, (unsigned long)high << 32 | low);
73}
74
75COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low)
76{
77 return ksys_ftruncate(fd, (unsigned long)high << 32 | low);
78}
79
80COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf,
81 compat_size_t, count, u32, high, u32, low)
82{
83 if ((compat_ssize_t) count < 0)
84 return -EINVAL;
85 return ksys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low);
86}
87
88COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf,
89 compat_size_t, count, u32, high, u32, low)
90{
91 if ((compat_ssize_t) count < 0)
92 return -EINVAL;
93 return ksys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low);
94}
95
96COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count)
97{
98 return ksys_readahead(fd, (unsigned long)high << 32 | low, count);
99}
100
101struct stat64_emu31 {
102 unsigned long long st_dev;
103 unsigned int __pad1;
104#define STAT64_HAS_BROKEN_ST_INO 1
105 u32 __st_ino;
106 unsigned int st_mode;
107 unsigned int st_nlink;
108 u32 st_uid;
109 u32 st_gid;
110 unsigned long long st_rdev;
111 unsigned int __pad3;
112 long st_size;
113 u32 st_blksize;
114 unsigned char __pad4[4];
115 u32 __pad5; /* future possible st_blocks high bits */
116 u32 st_blocks; /* Number 512-byte blocks allocated. */
117 u32 st_atime;
118 u32 __pad6;
119 u32 st_mtime;
120 u32 __pad7;
121 u32 st_ctime;
122 u32 __pad8; /* will be high 32 bits of ctime someday */
123 unsigned long st_ino;
124};
125
126static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
127{
128 struct stat64_emu31 tmp;
129
130 memset(&tmp, 0, sizeof(tmp));
131
132 tmp.st_dev = huge_encode_dev(stat->dev);
133 tmp.st_ino = stat->ino;
134 tmp.__st_ino = (u32)stat->ino;
135 tmp.st_mode = stat->mode;
136 tmp.st_nlink = (unsigned int)stat->nlink;
137 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
138 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
139 tmp.st_rdev = huge_encode_dev(stat->rdev);
140 tmp.st_size = stat->size;
141 tmp.st_blksize = (u32)stat->blksize;
142 tmp.st_blocks = (u32)stat->blocks;
143 tmp.st_atime = (u32)stat->atime.tv_sec;
144 tmp.st_mtime = (u32)stat->mtime.tv_sec;
145 tmp.st_ctime = (u32)stat->ctime.tv_sec;
146
147 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
148}
149
150COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
151{
152 struct kstat stat;
153 int ret = vfs_stat(filename, &stat);
154 if (!ret)
155 ret = cp_stat64(statbuf, &stat);
156 return ret;
157}
158
159COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
160{
161 struct kstat stat;
162 int ret = vfs_lstat(filename, &stat);
163 if (!ret)
164 ret = cp_stat64(statbuf, &stat);
165 return ret;
166}
167
168COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf)
169{
170 struct kstat stat;
171 int ret = vfs_fstat(fd, &stat);
172 if (!ret)
173 ret = cp_stat64(statbuf, &stat);
174 return ret;
175}
176
177COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename,
178 struct stat64_emu31 __user *, statbuf, int, flag)
179{
180 struct kstat stat;
181 int error;
182
183 error = vfs_fstatat(dfd, filename, &stat, flag);
184 if (error)
185 return error;
186 return cp_stat64(statbuf, &stat);
187}
188
189/*
190 * Linux/i386 didn't use to be able to handle more than
191 * 4 system call parameters, so these system calls used a memory
192 * block for parameter passing..
193 */
194
195struct mmap_arg_struct_emu31 {
196 compat_ulong_t addr;
197 compat_ulong_t len;
198 compat_ulong_t prot;
199 compat_ulong_t flags;
200 compat_ulong_t fd;
201 compat_ulong_t offset;
202};
203
204COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg)
205{
206 struct mmap_arg_struct_emu31 a;
207
208 if (copy_from_user(&a, arg, sizeof(a)))
209 return -EFAULT;
210 if (a.offset & ~PAGE_MASK)
211 return -EINVAL;
212 return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
213 a.offset >> PAGE_SHIFT);
214}
215
216COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg)
217{
218 struct mmap_arg_struct_emu31 a;
219
220 if (copy_from_user(&a, arg, sizeof(a)))
221 return -EFAULT;
222 return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
223}
224
225COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count)
226{
227 if ((compat_ssize_t) count < 0)
228 return -EINVAL;
229
230 return ksys_read(fd, buf, count);
231}
232
233COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count)
234{
235 if ((compat_ssize_t) count < 0)
236 return -EINVAL;
237
238 return ksys_write(fd, buf, count);
239}
240
241/*
242 * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
243 * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
244 * because the 31 bit values differ from the 64 bit values.
245 */
246
247COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise)
248{
249 if (advise == 4)
250 advise = POSIX_FADV_DONTNEED;
251 else if (advise == 5)
252 advise = POSIX_FADV_NOREUSE;
253 return ksys_fadvise64_64(fd, (unsigned long)high << 32 | low, len,
254 advise);
255}
256
257struct fadvise64_64_args {
258 int fd;
259 long long offset;
260 long long len;
261 int advice;
262};
263
264COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
265{
266 struct fadvise64_64_args a;
267
268 if ( copy_from_user(&a, args, sizeof(a)) )
269 return -EFAULT;
270 if (a.advice == 4)
271 a.advice = POSIX_FADV_DONTNEED;
272 else if (a.advice == 5)
273 a.advice = POSIX_FADV_NOREUSE;
274 return ksys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
275}
276
277COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow,
278 u32, nhigh, u32, nlow, unsigned int, flags)
279{
280 return ksys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,
281 ((u64)nhigh << 32) + nlow, flags);
282}
283
284COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow,
285 u32, lenhigh, u32, lenlow)
286{
287 return ksys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow,
288 ((u64)lenhigh << 32) + lenlow);
289}
1/*
2 * S390 version
3 * Copyright IBM Corp. 2000
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
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>
25#include <linux/smp.h>
26#include <linux/sem.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/uio.h>
30#include <linux/quota.h>
31#include <linux/module.h>
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>
45#include <linux/capability.h>
46#include <linux/compat.h>
47#include <linux/vfs.h>
48#include <linux/ptrace.h>
49#include <linux/fadvise.h>
50#include <linux/ipc.h>
51#include <linux/slab.h>
52
53#include <asm/types.h>
54#include <asm/uaccess.h>
55
56#include <net/scm.h>
57#include <net/sock.h>
58
59#include "compat_linux.h"
60
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
89COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
90 u16, user, u16, group)
91{
92 return sys_chown(filename, low2highuid(user), low2highgid(group));
93}
94
95COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
96 filename, u16, user, u16, group)
97{
98 return sys_lchown(filename, low2highuid(user), low2highgid(group));
99}
100
101COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
102{
103 return sys_fchown(fd, low2highuid(user), low2highgid(group));
104}
105
106COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
107{
108 return sys_setregid(low2highgid(rgid), low2highgid(egid));
109}
110
111COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
112{
113 return sys_setgid((gid_t)gid);
114}
115
116COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
117{
118 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
119}
120
121COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
122{
123 return sys_setuid((uid_t)uid);
124}
125
126COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
127{
128 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
129 low2highuid(suid));
130}
131
132COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
133 u16 __user *, euidp, u16 __user *, suidp)
134{
135 const struct cred *cred = current_cred();
136 int retval;
137 u16 ruid, euid, suid;
138
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);
146
147 return retval;
148}
149
150COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
151{
152 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
153 low2highgid(sgid));
154}
155
156COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
157 u16 __user *, egidp, u16 __user *, sgidp)
158{
159 const struct cred *cred = current_cred();
160 int retval;
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));
166
167 if (!(retval = put_user(rgid, rgidp)) &&
168 !(retval = put_user(egid, egidp)))
169 retval = put_user(sgid, sgidp);
170
171 return retval;
172}
173
174COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
175{
176 return sys_setfsuid((uid_t)uid);
177}
178
179COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
180{
181 return sys_setfsgid((gid_t)gid);
182}
183
184static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
185{
186 struct user_namespace *user_ns = current_user_ns();
187 int i;
188 u16 group;
189 kgid_t kgid;
190
191 for (i = 0; i < group_info->ngroups; i++) {
192 kgid = GROUP_AT(group_info, i);
193 group = (u16)from_kgid_munged(user_ns, kgid);
194 if (put_user(group, grouplist+i))
195 return -EFAULT;
196 }
197
198 return 0;
199}
200
201static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
202{
203 struct user_namespace *user_ns = current_user_ns();
204 int i;
205 u16 group;
206 kgid_t kgid;
207
208 for (i = 0; i < group_info->ngroups; i++) {
209 if (get_user(group, grouplist+i))
210 return -EFAULT;
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;
217 }
218
219 return 0;
220}
221
222COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
223{
224 const struct cred *cred = current_cred();
225 int i;
226
227 if (gidsetsize < 0)
228 return -EINVAL;
229
230 get_group_info(cred->group_info);
231 i = cred->group_info->ngroups;
232 if (gidsetsize) {
233 if (i > gidsetsize) {
234 i = -EINVAL;
235 goto out;
236 }
237 if (groups16_to_user(grouplist, cred->group_info)) {
238 i = -EFAULT;
239 goto out;
240 }
241 }
242out:
243 put_group_info(cred->group_info);
244 return i;
245}
246
247COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
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
272COMPAT_SYSCALL_DEFINE0(s390_getuid16)
273{
274 return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
275}
276
277COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
278{
279 return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
280}
281
282COMPAT_SYSCALL_DEFINE0(s390_getgid16)
283{
284 return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
285}
286
287COMPAT_SYSCALL_DEFINE0(s390_getegid16)
288{
289 return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
290}
291
292#ifdef CONFIG_SYSVIPC
293COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
294 compat_ulong_t, third, compat_uptr_t, ptr)
295{
296 if (call >> 16) /* hack for backward compatibility */
297 return -EINVAL;
298 return compat_sys_ipc(call, first, second, third, ptr, third);
299}
300#endif
301
302COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low)
303{
304 return sys_truncate(path, (unsigned long)high << 32 | low);
305}
306
307COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low)
308{
309 return sys_ftruncate(fd, (unsigned long)high << 32 | low);
310}
311
312COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf,
313 compat_size_t, count, u32, high, u32, low)
314{
315 if ((compat_ssize_t) count < 0)
316 return -EINVAL;
317 return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low);
318}
319
320COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf,
321 compat_size_t, count, u32, high, u32, low)
322{
323 if ((compat_ssize_t) count < 0)
324 return -EINVAL;
325 return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low);
326}
327
328COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count)
329{
330 return sys_readahead(fd, (unsigned long)high << 32 | low, count);
331}
332
333struct 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
358static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
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;
369 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
370 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
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
382COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
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
391COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
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
400COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf)
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
409COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename,
410 struct stat64_emu31 __user *, statbuf, int, flag)
411{
412 struct kstat stat;
413 int error;
414
415 error = vfs_fstatat(dfd, filename, &stat, flag);
416 if (error)
417 return error;
418 return cp_stat64(statbuf, &stat);
419}
420
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
427struct mmap_arg_struct_emu31 {
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;
434};
435
436COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg)
437{
438 struct mmap_arg_struct_emu31 a;
439
440 if (copy_from_user(&a, arg, sizeof(a)))
441 return -EFAULT;
442 if (a.offset & ~PAGE_MASK)
443 return -EINVAL;
444 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
445 a.offset >> PAGE_SHIFT);
446}
447
448COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg)
449{
450 struct mmap_arg_struct_emu31 a;
451
452 if (copy_from_user(&a, arg, sizeof(a)))
453 return -EFAULT;
454 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
455}
456
457COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count)
458{
459 if ((compat_ssize_t) count < 0)
460 return -EINVAL;
461
462 return sys_read(fd, buf, count);
463}
464
465COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count)
466{
467 if ((compat_ssize_t) count < 0)
468 return -EINVAL;
469
470 return sys_write(fd, buf, count);
471}
472
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
479COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise)
480{
481 if (advise == 4)
482 advise = POSIX_FADV_DONTNEED;
483 else if (advise == 5)
484 advise = POSIX_FADV_NOREUSE;
485 return sys_fadvise64(fd, (unsigned long)high << 32 | low, len, advise);
486}
487
488struct fadvise64_64_args {
489 int fd;
490 long long offset;
491 long long len;
492 int advice;
493};
494
495COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
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}
507
508COMPAT_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
515COMPAT_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}