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289 lines
7.8 KiB
289 lines
7.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* S390 version |
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* Copyright IBM Corp. 2000 |
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* Author(s): Martin Schwidefsky ([email protected]), |
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* Gerhard Tonn ([email protected]) |
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* Thomas Spatzier ([email protected]) |
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* |
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* Conversion between 31bit and 64bit native syscalls. |
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* |
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* Heavily inspired by the 32-bit Sparc compat code which is |
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* Copyright (C) 1997,1998 Jakub Jelinek ([email protected]) |
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* Copyright (C) 1997 David S. Miller ([email protected]) |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/fs.h> |
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#include <linux/mm.h> |
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#include <linux/file.h> |
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#include <linux/signal.h> |
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#include <linux/resource.h> |
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#include <linux/times.h> |
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#include <linux/smp.h> |
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#include <linux/sem.h> |
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#include <linux/msg.h> |
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#include <linux/shm.h> |
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#include <linux/uio.h> |
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#include <linux/quota.h> |
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#include <linux/poll.h> |
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#include <linux/personality.h> |
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#include <linux/stat.h> |
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#include <linux/filter.h> |
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#include <linux/highmem.h> |
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#include <linux/mman.h> |
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#include <linux/ipv6.h> |
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#include <linux/in.h> |
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#include <linux/icmpv6.h> |
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#include <linux/syscalls.h> |
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#include <linux/sysctl.h> |
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#include <linux/binfmts.h> |
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#include <linux/capability.h> |
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#include <linux/compat.h> |
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#include <linux/vfs.h> |
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#include <linux/ptrace.h> |
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#include <linux/fadvise.h> |
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#include <linux/ipc.h> |
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#include <linux/slab.h> |
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#include <asm/types.h> |
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#include <linux/uaccess.h> |
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#include <net/scm.h> |
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#include <net/sock.h> |
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#include "compat_linux.h" |
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#ifdef CONFIG_SYSVIPC |
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COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second, |
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compat_ulong_t, third, compat_uptr_t, ptr) |
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{ |
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if (call >> 16) /* hack for backward compatibility */ |
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return -EINVAL; |
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return compat_ksys_ipc(call, first, second, third, ptr, third); |
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} |
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#endif |
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COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low) |
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{ |
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return ksys_truncate(path, (unsigned long)high << 32 | low); |
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} |
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COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low) |
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{ |
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return ksys_ftruncate(fd, (unsigned long)high << 32 | low); |
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} |
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COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf, |
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compat_size_t, count, u32, high, u32, low) |
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{ |
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if ((compat_ssize_t) count < 0) |
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return -EINVAL; |
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return ksys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low); |
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} |
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COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf, |
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compat_size_t, count, u32, high, u32, low) |
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{ |
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if ((compat_ssize_t) count < 0) |
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return -EINVAL; |
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return ksys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low); |
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} |
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COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count) |
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{ |
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return ksys_readahead(fd, (unsigned long)high << 32 | low, count); |
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} |
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struct stat64_emu31 { |
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unsigned long long st_dev; |
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unsigned int __pad1; |
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#define STAT64_HAS_BROKEN_ST_INO 1 |
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u32 __st_ino; |
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unsigned int st_mode; |
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unsigned int st_nlink; |
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u32 st_uid; |
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u32 st_gid; |
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unsigned long long st_rdev; |
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unsigned int __pad3; |
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long st_size; |
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u32 st_blksize; |
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unsigned char __pad4[4]; |
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u32 __pad5; /* future possible st_blocks high bits */ |
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u32 st_blocks; /* Number 512-byte blocks allocated. */ |
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u32 st_atime; |
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u32 __pad6; |
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u32 st_mtime; |
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u32 __pad7; |
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u32 st_ctime; |
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u32 __pad8; /* will be high 32 bits of ctime someday */ |
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unsigned long st_ino; |
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}; |
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static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat) |
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{ |
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struct stat64_emu31 tmp; |
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memset(&tmp, 0, sizeof(tmp)); |
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tmp.st_dev = huge_encode_dev(stat->dev); |
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tmp.st_ino = stat->ino; |
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tmp.__st_ino = (u32)stat->ino; |
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tmp.st_mode = stat->mode; |
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tmp.st_nlink = (unsigned int)stat->nlink; |
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tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid); |
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tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid); |
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tmp.st_rdev = huge_encode_dev(stat->rdev); |
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tmp.st_size = stat->size; |
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tmp.st_blksize = (u32)stat->blksize; |
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tmp.st_blocks = (u32)stat->blocks; |
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tmp.st_atime = (u32)stat->atime.tv_sec; |
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tmp.st_mtime = (u32)stat->mtime.tv_sec; |
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tmp.st_ctime = (u32)stat->ctime.tv_sec; |
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return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; |
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} |
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COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf) |
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{ |
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struct kstat stat; |
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int ret = vfs_stat(filename, &stat); |
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if (!ret) |
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ret = cp_stat64(statbuf, &stat); |
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return ret; |
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} |
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COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf) |
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{ |
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struct kstat stat; |
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int ret = vfs_lstat(filename, &stat); |
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if (!ret) |
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ret = cp_stat64(statbuf, &stat); |
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return ret; |
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} |
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COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf) |
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{ |
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struct kstat stat; |
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int ret = vfs_fstat(fd, &stat); |
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if (!ret) |
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ret = cp_stat64(statbuf, &stat); |
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return ret; |
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} |
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COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename, |
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struct stat64_emu31 __user *, statbuf, int, flag) |
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{ |
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struct kstat stat; |
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int error; |
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error = vfs_fstatat(dfd, filename, &stat, flag); |
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if (error) |
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return error; |
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return cp_stat64(statbuf, &stat); |
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} |
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/* |
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* Linux/i386 didn't use to be able to handle more than |
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* 4 system call parameters, so these system calls used a memory |
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* block for parameter passing.. |
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*/ |
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struct mmap_arg_struct_emu31 { |
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compat_ulong_t addr; |
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compat_ulong_t len; |
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compat_ulong_t prot; |
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compat_ulong_t flags; |
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compat_ulong_t fd; |
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compat_ulong_t offset; |
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}; |
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COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg) |
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{ |
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struct mmap_arg_struct_emu31 a; |
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if (copy_from_user(&a, arg, sizeof(a))) |
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return -EFAULT; |
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if (a.offset & ~PAGE_MASK) |
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return -EINVAL; |
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return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, |
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a.offset >> PAGE_SHIFT); |
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} |
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COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg) |
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{ |
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struct mmap_arg_struct_emu31 a; |
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if (copy_from_user(&a, arg, sizeof(a))) |
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return -EFAULT; |
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return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); |
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} |
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COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count) |
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{ |
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if ((compat_ssize_t) count < 0) |
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return -EINVAL; |
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return ksys_read(fd, buf, count); |
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} |
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COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count) |
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{ |
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if ((compat_ssize_t) count < 0) |
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return -EINVAL; |
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return ksys_write(fd, buf, count); |
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} |
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/* |
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* 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64. |
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* These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE} |
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* because the 31 bit values differ from the 64 bit values. |
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*/ |
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COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise) |
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{ |
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if (advise == 4) |
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advise = POSIX_FADV_DONTNEED; |
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else if (advise == 5) |
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advise = POSIX_FADV_NOREUSE; |
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return ksys_fadvise64_64(fd, (unsigned long)high << 32 | low, len, |
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advise); |
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} |
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struct fadvise64_64_args { |
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int fd; |
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long long offset; |
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long long len; |
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int advice; |
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}; |
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COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args) |
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{ |
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struct fadvise64_64_args a; |
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if ( copy_from_user(&a, args, sizeof(a)) ) |
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return -EFAULT; |
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if (a.advice == 4) |
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a.advice = POSIX_FADV_DONTNEED; |
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else if (a.advice == 5) |
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a.advice = POSIX_FADV_NOREUSE; |
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return ksys_fadvise64_64(a.fd, a.offset, a.len, a.advice); |
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} |
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COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow, |
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u32, nhigh, u32, nlow, unsigned int, flags) |
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{ |
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return ksys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow, |
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((u64)nhigh << 32) + nlow, flags); |
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} |
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COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow, |
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u32, lenhigh, u32, lenlow) |
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{ |
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return ksys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow, |
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((u64)lenhigh << 32) + lenlow); |
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}
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