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Diffstat (limited to 'arch/s390/kernel/compat_linux.c')
-rw-r--r--arch/s390/kernel/compat_linux.c519
1 files changed, 0 insertions, 519 deletions
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
deleted file mode 100644
index a3d14161abcb..000000000000
--- a/arch/s390/kernel/compat_linux.c
+++ /dev/null
@@ -1,519 +0,0 @@
-/*
- * S390 version
- * Copyright IBM Corp. 2000
- * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
- * Gerhard Tonn (ton@de.ibm.com)
- * Thomas Spatzier (tspat@de.ibm.com)
- *
- * Conversion between 31bit and 64bit native syscalls.
- *
- * Heavily inspired by the 32-bit Sparc compat code which is
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
- *
- */
-
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/file.h>
-#include <linux/signal.h>
-#include <linux/resource.h>
-#include <linux/times.h>
-#include <linux/smp.h>
-#include <linux/sem.h>
-#include <linux/msg.h>
-#include <linux/shm.h>
-#include <linux/uio.h>
-#include <linux/quota.h>
-#include <linux/poll.h>
-#include <linux/personality.h>
-#include <linux/stat.h>
-#include <linux/filter.h>
-#include <linux/highmem.h>
-#include <linux/highuid.h>
-#include <linux/mman.h>
-#include <linux/ipv6.h>
-#include <linux/in.h>
-#include <linux/icmpv6.h>
-#include <linux/syscalls.h>
-#include <linux/sysctl.h>
-#include <linux/binfmts.h>
-#include <linux/capability.h>
-#include <linux/compat.h>
-#include <linux/vfs.h>
-#include <linux/ptrace.h>
-#include <linux/fadvise.h>
-#include <linux/ipc.h>
-#include <linux/slab.h>
-
-#include <asm/types.h>
-#include <linux/uaccess.h>
-
-#include <net/scm.h>
-#include <net/sock.h>
-
-#include "compat_linux.h"
-
-/* For this source file, we want overflow handling. */
-
-#undef high2lowuid
-#undef high2lowgid
-#undef low2highuid
-#undef low2highgid
-#undef SET_UID16
-#undef SET_GID16
-#undef NEW_TO_OLD_UID
-#undef NEW_TO_OLD_GID
-#undef SET_OLDSTAT_UID
-#undef SET_OLDSTAT_GID
-#undef SET_STAT_UID
-#undef SET_STAT_GID
-
-#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
-#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
-#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
-#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
-#define SET_UID16(var, uid) var = high2lowuid(uid)
-#define SET_GID16(var, gid) var = high2lowgid(gid)
-#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
-#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
-#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
-#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
-#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
-#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
-
-COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
- u16, user, u16, group)
-{
- return sys_chown(filename, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
- filename, u16, user, u16, group)
-{
- return sys_lchown(filename, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
-{
- return sys_fchown(fd, low2highuid(user), low2highgid(group));
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
-{
- return sys_setregid(low2highgid(rgid), low2highgid(egid));
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
-{
- return sys_setgid((gid_t)gid);
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
-{
- return sys_setreuid(low2highuid(ruid), low2highuid(euid));
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
-{
- return sys_setuid((uid_t)uid);
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
-{
- return sys_setresuid(low2highuid(ruid), low2highuid(euid),
- low2highuid(suid));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
- u16 __user *, euidp, u16 __user *, suidp)
-{
- const struct cred *cred = current_cred();
- int retval;
- u16 ruid, euid, suid;
-
- ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
- euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
- suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
-
- if (!(retval = put_user(ruid, ruidp)) &&
- !(retval = put_user(euid, euidp)))
- retval = put_user(suid, suidp);
-
- return retval;
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
-{
- return sys_setresgid(low2highgid(rgid), low2highgid(egid),
- low2highgid(sgid));
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
- u16 __user *, egidp, u16 __user *, sgidp)
-{
- const struct cred *cred = current_cred();
- int retval;
- u16 rgid, egid, sgid;
-
- rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
- egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
- sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
-
- if (!(retval = put_user(rgid, rgidp)) &&
- !(retval = put_user(egid, egidp)))
- retval = put_user(sgid, sgidp);
-
- return retval;
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
-{
- return sys_setfsuid((uid_t)uid);
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
-{
- return sys_setfsgid((gid_t)gid);
-}
-
-static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
-{
- struct user_namespace *user_ns = current_user_ns();
- int i;
- u16 group;
- kgid_t kgid;
-
- for (i = 0; i < group_info->ngroups; i++) {
- kgid = group_info->gid[i];
- group = (u16)from_kgid_munged(user_ns, kgid);
- if (put_user(group, grouplist+i))
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
-{
- struct user_namespace *user_ns = current_user_ns();
- int i;
- u16 group;
- kgid_t kgid;
-
- for (i = 0; i < group_info->ngroups; i++) {
- if (get_user(group, grouplist+i))
- return -EFAULT;
-
- kgid = make_kgid(user_ns, (gid_t)group);
- if (!gid_valid(kgid))
- return -EINVAL;
-
- group_info->gid[i] = kgid;
- }
-
- return 0;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
-{
- const struct cred *cred = current_cred();
- int i;
-
- if (gidsetsize < 0)
- return -EINVAL;
-
- get_group_info(cred->group_info);
- i = cred->group_info->ngroups;
- if (gidsetsize) {
- if (i > gidsetsize) {
- i = -EINVAL;
- goto out;
- }
- if (groups16_to_user(grouplist, cred->group_info)) {
- i = -EFAULT;
- goto out;
- }
- }
-out:
- put_group_info(cred->group_info);
- return i;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
-{
- struct group_info *group_info;
- int retval;
-
- if (!may_setgroups())
- return -EPERM;
- if ((unsigned)gidsetsize > NGROUPS_MAX)
- return -EINVAL;
-
- group_info = groups_alloc(gidsetsize);
- if (!group_info)
- return -ENOMEM;
- retval = groups16_from_user(group_info, grouplist);
- if (retval) {
- put_group_info(group_info);
- return retval;
- }
-
- retval = set_current_groups(group_info);
- put_group_info(group_info);
-
- return retval;
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getuid16)
-{
- return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
-{
- return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getgid16)
-{
- return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
-}
-
-COMPAT_SYSCALL_DEFINE0(s390_getegid16)
-{
- return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
-}
-
-#ifdef CONFIG_SYSVIPC
-COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
- compat_ulong_t, third, compat_uptr_t, ptr)
-{
- if (call >> 16) /* hack for backward compatibility */
- return -EINVAL;
- return compat_sys_ipc(call, first, second, third, ptr, third);
-}
-#endif
-
-COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low)
-{
- return sys_truncate(path, (unsigned long)high << 32 | low);
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low)
-{
- return sys_ftruncate(fd, (unsigned long)high << 32 | low);
-}
-
-COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf,
- compat_size_t, count, u32, high, u32, low)
-{
- if ((compat_ssize_t) count < 0)
- return -EINVAL;
- return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low);
-}
-
-COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf,
- compat_size_t, count, u32, high, u32, low)
-{
- if ((compat_ssize_t) count < 0)
- return -EINVAL;
- return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low);
-}
-
-COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count)
-{
- return sys_readahead(fd, (unsigned long)high << 32 | low, count);
-}
-
-struct stat64_emu31 {
- unsigned long long st_dev;
- unsigned int __pad1;
-#define STAT64_HAS_BROKEN_ST_INO 1
- u32 __st_ino;
- unsigned int st_mode;
- unsigned int st_nlink;
- u32 st_uid;
- u32 st_gid;
- unsigned long long st_rdev;
- unsigned int __pad3;
- long st_size;
- u32 st_blksize;
- unsigned char __pad4[4];
- u32 __pad5; /* future possible st_blocks high bits */
- u32 st_blocks; /* Number 512-byte blocks allocated. */
- u32 st_atime;
- u32 __pad6;
- u32 st_mtime;
- u32 __pad7;
- u32 st_ctime;
- u32 __pad8; /* will be high 32 bits of ctime someday */
- unsigned long st_ino;
-};
-
-static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
-{
- struct stat64_emu31 tmp;
-
- memset(&tmp, 0, sizeof(tmp));
-
- tmp.st_dev = huge_encode_dev(stat->dev);
- tmp.st_ino = stat->ino;
- tmp.__st_ino = (u32)stat->ino;
- tmp.st_mode = stat->mode;
- tmp.st_nlink = (unsigned int)stat->nlink;
- tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
- tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
- tmp.st_rdev = huge_encode_dev(stat->rdev);
- tmp.st_size = stat->size;
- tmp.st_blksize = (u32)stat->blksize;
- tmp.st_blocks = (u32)stat->blocks;
- tmp.st_atime = (u32)stat->atime.tv_sec;
- tmp.st_mtime = (u32)stat->mtime.tv_sec;
- tmp.st_ctime = (u32)stat->ctime.tv_sec;
-
- return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
-{
- struct kstat stat;
- int ret = vfs_stat(filename, &stat);
- if (!ret)
- ret = cp_stat64(statbuf, &stat);
- return ret;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
-{
- struct kstat stat;
- int ret = vfs_lstat(filename, &stat);
- if (!ret)
- ret = cp_stat64(statbuf, &stat);
- return ret;
-}
-
-COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf)
-{
- struct kstat stat;
- int ret = vfs_fstat(fd, &stat);
- if (!ret)
- ret = cp_stat64(statbuf, &stat);
- return ret;
-}
-
-COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename,
- struct stat64_emu31 __user *, statbuf, int, flag)
-{
- struct kstat stat;
- int error;
-
- error = vfs_fstatat(dfd, filename, &stat, flag);
- if (error)
- return error;
- return cp_stat64(statbuf, &stat);
-}
-
-/*
- * Linux/i386 didn't use to be able to handle more than
- * 4 system call parameters, so these system calls used a memory
- * block for parameter passing..
- */
-
-struct mmap_arg_struct_emu31 {
- compat_ulong_t addr;
- compat_ulong_t len;
- compat_ulong_t prot;
- compat_ulong_t flags;
- compat_ulong_t fd;
- compat_ulong_t offset;
-};
-
-COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg)
-{
- struct mmap_arg_struct_emu31 a;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- return -EFAULT;
- if (a.offset & ~PAGE_MASK)
- return -EINVAL;
- return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
- a.offset >> PAGE_SHIFT);
-}
-
-COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg)
-{
- struct mmap_arg_struct_emu31 a;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- return -EFAULT;
- return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count)
-{
- if ((compat_ssize_t) count < 0)
- return -EINVAL;
-
- return sys_read(fd, buf, count);
-}
-
-COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count)
-{
- if ((compat_ssize_t) count < 0)
- return -EINVAL;
-
- return sys_write(fd, buf, count);
-}
-
-/*
- * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
- * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
- * because the 31 bit values differ from the 64 bit values.
- */
-
-COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise)
-{
- if (advise == 4)
- advise = POSIX_FADV_DONTNEED;
- else if (advise == 5)
- advise = POSIX_FADV_NOREUSE;
- return sys_fadvise64(fd, (unsigned long)high << 32 | low, len, advise);
-}
-
-struct fadvise64_64_args {
- int fd;
- long long offset;
- long long len;
- int advice;
-};
-
-COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
-{
- struct fadvise64_64_args a;
-
- if ( copy_from_user(&a, args, sizeof(a)) )
- return -EFAULT;
- if (a.advice == 4)
- a.advice = POSIX_FADV_DONTNEED;
- else if (a.advice == 5)
- a.advice = POSIX_FADV_NOREUSE;
- return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
-}
-
-COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow,
- u32, nhigh, u32, nlow, unsigned int, flags)
-{
- return sys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,
- ((u64)nhigh << 32) + nlow, flags);
-}
-
-COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow,
- u32, lenhigh, u32, lenlow)
-{
- return sys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow,
- ((u64)lenhigh << 32) + lenlow);
-}
generated by cgit (git 2.34.1) at 2025-12-25 02:12:13 +0000