1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * S390 version
4 * Copyright IBM Corp. 2000
5 * Author(s): Martin Schwidefsky (schwidefs
6 * Gerhard Tonn (ton@de.ibm.com)
7 * Thomas Spatzier (tspat@de.ibm
8 *
9 * Conversion between 31bit and 64bit native
10 *
11 * Heavily inspired by the 32-bit Sparc compat
12 * Copyright (C) 1997,1998 Jakub Jelinek (jj@s
13 * Copyright (C) 1997 David S. Miller (davem@c
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
61 COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, i
62 compat_ulong_t, third, compat_
63 {
64 if (call >> 16) /* hack for ba
65 return -EINVAL;
66 return compat_ksys_ipc(call, first, se
67 }
68 #endif
69
70 COMPAT_SYSCALL_DEFINE3(s390_truncate64, const
71 {
72 return ksys_truncate(path, (unsigned l
73 }
74
75 COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsig
76 {
77 return ksys_ftruncate(fd, (unsigned lo
78 }
79
80 COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned
81 compat_size_t, count, u
82 {
83 if ((compat_ssize_t) count < 0)
84 return -EINVAL;
85 return ksys_pread64(fd, ubuf, count, (
86 }
87
88 COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned
89 compat_size_t, count, u
90 {
91 if ((compat_ssize_t) count < 0)
92 return -EINVAL;
93 return ksys_pwrite64(fd, ubuf, count,
94 }
95
96 COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd
97 {
98 return ksys_readahead(fd, (unsigned lo
99 }
100
101 struct 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
116 u32 st_blocks; /* Number
117 u32 st_atime;
118 u32 __pad6;
119 u32 st_mtime;
120 u32 __pad7;
121 u32 st_ctime;
122 u32 __pad8; /* will be
123 unsigned long st_ino;
124 };
125
126 static int cp_stat64(struct stat64_emu31 __use
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->nli
137 tmp.st_uid = from_kuid_munged(current_
138 tmp.st_gid = from_kgid_munged(current_
139 tmp.st_rdev = huge_encode_dev(stat->rd
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(t
148 }
149
150 COMPAT_SYSCALL_DEFINE2(s390_stat64, const char
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
159 COMPAT_SYSCALL_DEFINE2(s390_lstat64, const cha
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
168 COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned
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
177 COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigne
178 struct stat64_emu31 __u
179 {
180 struct kstat stat;
181 int error;
182
183 error = vfs_fstatat(dfd, filename, &st
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
191 * 4 system call parameters, so these system c
192 * block for parameter passing..
193 */
194
195 struct 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
204 COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct m
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,
213 a.offset >> PAG
214 }
215
216 COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap
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,
223 }
224
225 COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int
226 {
227 if ((compat_ssize_t) count < 0)
228 return -EINVAL;
229
230 return ksys_read(fd, buf, count);
231 }
232
233 COMPAT_SYSCALL_DEFINE3(s390_write, unsigned in
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_
243 * These need to rewrite the advise values for
244 * because the 31 bit values differ from the 6
245 */
246
247 COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd
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
254 advise);
255 }
256
257 struct fadvise64_64_args {
258 int fd;
259 long long offset;
260 long long len;
261 int advice;
262 };
263
264 COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, stru
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.offse
275 }
276
277 COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, i
278 u32, nhigh, u32, nlow,
279 {
280 return ksys_sync_file_range(fd, ((loff
281 ((u64)nhigh
282 }
283
284 COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd
285 u32, lenhigh, u32, lenl
286 {
287 return ksys_fallocate(fd, mode, ((loff
288 ((u64)lenhigh <<
289 }
290
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