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![Linus Torvalds](/assets/img/avatar_default.png)
Pull x32 support for x86-64 from Ingo Molnar: "This tree introduces the X32 binary format and execution mode for x86: 32-bit data space binaries using 64-bit instructions and 64-bit kernel syscalls. This allows applications whose working set fits into a 32 bits address space to make use of 64-bit instructions while using a 32-bit address space with shorter pointers, more compressed data structures, etc." Fix up trivial context conflicts in arch/x86/{Kconfig,vdso/vma.c} * 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits) x32: Fix alignment fail in struct compat_siginfo x32: Fix stupid ia32/x32 inversion in the siginfo format x32: Add ptrace for x32 x32: Switch to a 64-bit clock_t x32: Provide separate is_ia32_task() and is_x32_task() predicates x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls x86/x32: Fix the binutils auto-detect x32: Warn and disable rather than error if binutils too old x32: Only clear TIF_X32 flag once x32: Make sure TS_COMPAT is cleared for x32 tasks fs: Remove missed ->fds_bits from cessation use of fd_set structs internally fs: Fix close_on_exec pointer in alloc_fdtable x32: Drop non-__vdso weak symbols from the x32 VDSO x32: Fix coding style violations in the x32 VDSO code x32: Add x32 VDSO support x32: Allow x32 to be configured x32: If configured, add x32 system calls to system call tables x32: Handle process creation x32: Signal-related system calls x86: Add #ifdef CONFIG_COMPAT to <asm/sys_ia32.h> ...
1807 lines
44 KiB
C
1807 lines
44 KiB
C
/*
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* linux/fs/compat.c
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*
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* Kernel compatibililty routines for e.g. 32 bit syscall support
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* on 64 bit kernels.
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*
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* Copyright (C) 2002 Stephen Rothwell, IBM Corporation
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* Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
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* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
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* Copyright (C) 2003 Pavel Machek (pavel@ucw.cz)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/linkage.h>
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#include <linux/compat.h>
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#include <linux/errno.h>
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#include <linux/time.h>
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#include <linux/fs.h>
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#include <linux/fcntl.h>
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#include <linux/namei.h>
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#include <linux/file.h>
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#include <linux/fdtable.h>
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#include <linux/vfs.h>
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#include <linux/ioctl.h>
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#include <linux/init.h>
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#include <linux/ncp_mount.h>
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#include <linux/nfs4_mount.h>
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#include <linux/syscalls.h>
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#include <linux/ctype.h>
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#include <linux/dirent.h>
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#include <linux/fsnotify.h>
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#include <linux/highuid.h>
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#include <linux/personality.h>
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#include <linux/rwsem.h>
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#include <linux/tsacct_kern.h>
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#include <linux/security.h>
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#include <linux/highmem.h>
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#include <linux/signal.h>
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#include <linux/poll.h>
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#include <linux/mm.h>
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#include <linux/eventpoll.h>
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#include <linux/fs_struct.h>
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#include <linux/slab.h>
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#include <linux/pagemap.h>
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#include <asm/uaccess.h>
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#include <asm/mmu_context.h>
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#include <asm/ioctls.h>
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#include "internal.h"
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int compat_log = 1;
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int compat_printk(const char *fmt, ...)
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{
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va_list ap;
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int ret;
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if (!compat_log)
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return 0;
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va_start(ap, fmt);
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ret = vprintk(fmt, ap);
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va_end(ap);
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return ret;
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}
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#include "read_write.h"
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/*
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* Not all architectures have sys_utime, so implement this in terms
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* of sys_utimes.
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*/
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asmlinkage long compat_sys_utime(const char __user *filename,
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struct compat_utimbuf __user *t)
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{
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struct timespec tv[2];
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if (t) {
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if (get_user(tv[0].tv_sec, &t->actime) ||
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get_user(tv[1].tv_sec, &t->modtime))
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return -EFAULT;
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tv[0].tv_nsec = 0;
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tv[1].tv_nsec = 0;
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}
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return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
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}
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asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
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{
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struct timespec tv[2];
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if (t) {
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if (get_compat_timespec(&tv[0], &t[0]) ||
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get_compat_timespec(&tv[1], &t[1]))
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return -EFAULT;
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if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
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return 0;
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}
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return do_utimes(dfd, filename, t ? tv : NULL, flags);
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}
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asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
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{
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struct timespec tv[2];
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if (t) {
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if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
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get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
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get_user(tv[1].tv_sec, &t[1].tv_sec) ||
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get_user(tv[1].tv_nsec, &t[1].tv_usec))
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return -EFAULT;
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if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
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tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
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return -EINVAL;
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tv[0].tv_nsec *= 1000;
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tv[1].tv_nsec *= 1000;
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}
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return do_utimes(dfd, filename, t ? tv : NULL, 0);
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}
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asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
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{
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return compat_sys_futimesat(AT_FDCWD, filename, t);
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}
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static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
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{
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struct compat_stat tmp;
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if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
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return -EOVERFLOW;
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memset(&tmp, 0, sizeof(tmp));
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tmp.st_dev = old_encode_dev(stat->dev);
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tmp.st_ino = stat->ino;
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if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
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return -EOVERFLOW;
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tmp.st_mode = stat->mode;
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tmp.st_nlink = stat->nlink;
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if (tmp.st_nlink != stat->nlink)
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return -EOVERFLOW;
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SET_UID(tmp.st_uid, stat->uid);
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SET_GID(tmp.st_gid, stat->gid);
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tmp.st_rdev = old_encode_dev(stat->rdev);
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if ((u64) stat->size > MAX_NON_LFS)
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return -EOVERFLOW;
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tmp.st_size = stat->size;
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tmp.st_atime = stat->atime.tv_sec;
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tmp.st_atime_nsec = stat->atime.tv_nsec;
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tmp.st_mtime = stat->mtime.tv_sec;
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tmp.st_mtime_nsec = stat->mtime.tv_nsec;
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tmp.st_ctime = stat->ctime.tv_sec;
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tmp.st_ctime_nsec = stat->ctime.tv_nsec;
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tmp.st_blocks = stat->blocks;
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tmp.st_blksize = stat->blksize;
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return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
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}
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asmlinkage long compat_sys_newstat(const char __user * filename,
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struct compat_stat __user *statbuf)
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{
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struct kstat stat;
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int error;
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error = vfs_stat(filename, &stat);
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if (error)
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return error;
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return cp_compat_stat(&stat, statbuf);
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}
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asmlinkage long compat_sys_newlstat(const char __user * filename,
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struct compat_stat __user *statbuf)
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{
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struct kstat stat;
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int error;
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error = vfs_lstat(filename, &stat);
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if (error)
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return error;
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return cp_compat_stat(&stat, statbuf);
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}
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#ifndef __ARCH_WANT_STAT64
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asmlinkage long compat_sys_newfstatat(unsigned int dfd,
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const char __user *filename,
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struct compat_stat __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_compat_stat(&stat, statbuf);
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}
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#endif
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asmlinkage long compat_sys_newfstat(unsigned int fd,
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struct compat_stat __user * statbuf)
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{
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struct kstat stat;
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int error = vfs_fstat(fd, &stat);
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if (!error)
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error = cp_compat_stat(&stat, statbuf);
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return error;
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}
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static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
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{
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if (sizeof ubuf->f_blocks == 4) {
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if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
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kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
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return -EOVERFLOW;
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/* f_files and f_ffree may be -1; it's okay
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* to stuff that into 32 bits */
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if (kbuf->f_files != 0xffffffffffffffffULL
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&& (kbuf->f_files & 0xffffffff00000000ULL))
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return -EOVERFLOW;
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if (kbuf->f_ffree != 0xffffffffffffffffULL
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&& (kbuf->f_ffree & 0xffffffff00000000ULL))
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return -EOVERFLOW;
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}
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if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
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__put_user(kbuf->f_type, &ubuf->f_type) ||
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__put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
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__put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
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__put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
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__put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
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__put_user(kbuf->f_files, &ubuf->f_files) ||
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__put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
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__put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
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__put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
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__put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
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__put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
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__put_user(kbuf->f_flags, &ubuf->f_flags) ||
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__clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
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return -EFAULT;
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return 0;
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}
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/*
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* The following statfs calls are copies of code from fs/statfs.c and
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* should be checked against those from time to time
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*/
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asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
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{
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struct kstatfs tmp;
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int error = user_statfs(pathname, &tmp);
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if (!error)
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error = put_compat_statfs(buf, &tmp);
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return error;
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}
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asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
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{
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struct kstatfs tmp;
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int error = fd_statfs(fd, &tmp);
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if (!error)
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error = put_compat_statfs(buf, &tmp);
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return error;
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}
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static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
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{
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if (sizeof ubuf->f_blocks == 4) {
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if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
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kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
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return -EOVERFLOW;
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/* f_files and f_ffree may be -1; it's okay
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* to stuff that into 32 bits */
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if (kbuf->f_files != 0xffffffffffffffffULL
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&& (kbuf->f_files & 0xffffffff00000000ULL))
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return -EOVERFLOW;
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if (kbuf->f_ffree != 0xffffffffffffffffULL
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&& (kbuf->f_ffree & 0xffffffff00000000ULL))
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return -EOVERFLOW;
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}
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if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
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__put_user(kbuf->f_type, &ubuf->f_type) ||
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__put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
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__put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
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__put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
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__put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
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__put_user(kbuf->f_files, &ubuf->f_files) ||
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__put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
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__put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
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__put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
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__put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
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__put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
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__put_user(kbuf->f_flags, &ubuf->f_flags) ||
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__clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
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return -EFAULT;
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return 0;
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}
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asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
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{
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struct kstatfs tmp;
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int error;
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if (sz != sizeof(*buf))
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return -EINVAL;
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error = user_statfs(pathname, &tmp);
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if (!error)
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error = put_compat_statfs64(buf, &tmp);
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return error;
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}
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asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
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{
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struct kstatfs tmp;
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int error;
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if (sz != sizeof(*buf))
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return -EINVAL;
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error = fd_statfs(fd, &tmp);
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if (!error)
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error = put_compat_statfs64(buf, &tmp);
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return error;
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}
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/*
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* This is a copy of sys_ustat, just dealing with a structure layout.
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* Given how simple this syscall is that apporach is more maintainable
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* than the various conversion hacks.
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*/
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asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
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{
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struct compat_ustat tmp;
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struct kstatfs sbuf;
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int err = vfs_ustat(new_decode_dev(dev), &sbuf);
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if (err)
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return err;
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memset(&tmp, 0, sizeof(struct compat_ustat));
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tmp.f_tfree = sbuf.f_bfree;
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tmp.f_tinode = sbuf.f_ffree;
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if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
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return -EFAULT;
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return 0;
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}
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static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
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{
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if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
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__get_user(kfl->l_type, &ufl->l_type) ||
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__get_user(kfl->l_whence, &ufl->l_whence) ||
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__get_user(kfl->l_start, &ufl->l_start) ||
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__get_user(kfl->l_len, &ufl->l_len) ||
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__get_user(kfl->l_pid, &ufl->l_pid))
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return -EFAULT;
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return 0;
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}
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static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
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{
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if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
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__put_user(kfl->l_type, &ufl->l_type) ||
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__put_user(kfl->l_whence, &ufl->l_whence) ||
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__put_user(kfl->l_start, &ufl->l_start) ||
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__put_user(kfl->l_len, &ufl->l_len) ||
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__put_user(kfl->l_pid, &ufl->l_pid))
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return -EFAULT;
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return 0;
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}
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#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
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static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
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{
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if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
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__get_user(kfl->l_type, &ufl->l_type) ||
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__get_user(kfl->l_whence, &ufl->l_whence) ||
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__get_user(kfl->l_start, &ufl->l_start) ||
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__get_user(kfl->l_len, &ufl->l_len) ||
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__get_user(kfl->l_pid, &ufl->l_pid))
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return -EFAULT;
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return 0;
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}
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#endif
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|
|
#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
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static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
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{
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if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
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__put_user(kfl->l_type, &ufl->l_type) ||
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__put_user(kfl->l_whence, &ufl->l_whence) ||
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__put_user(kfl->l_start, &ufl->l_start) ||
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__put_user(kfl->l_len, &ufl->l_len) ||
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__put_user(kfl->l_pid, &ufl->l_pid))
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return -EFAULT;
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|
return 0;
|
|
}
|
|
#endif
|
|
|
|
asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
mm_segment_t old_fs;
|
|
struct flock f;
|
|
long ret;
|
|
|
|
switch (cmd) {
|
|
case F_GETLK:
|
|
case F_SETLK:
|
|
case F_SETLKW:
|
|
ret = get_compat_flock(&f, compat_ptr(arg));
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|
if (ret != 0)
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|
break;
|
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old_fs = get_fs();
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|
set_fs(KERNEL_DS);
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ret = sys_fcntl(fd, cmd, (unsigned long)&f);
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set_fs(old_fs);
|
|
if (cmd == F_GETLK && ret == 0) {
|
|
/* GETLK was successful and we need to return the data...
|
|
* but it needs to fit in the compat structure.
|
|
* l_start shouldn't be too big, unless the original
|
|
* start + end is greater than COMPAT_OFF_T_MAX, in which
|
|
* case the app was asking for trouble, so we return
|
|
* -EOVERFLOW in that case.
|
|
* l_len could be too big, in which case we just truncate it,
|
|
* and only allow the app to see that part of the conflicting
|
|
* lock that might make sense to it anyway
|
|
*/
|
|
|
|
if (f.l_start > COMPAT_OFF_T_MAX)
|
|
ret = -EOVERFLOW;
|
|
if (f.l_len > COMPAT_OFF_T_MAX)
|
|
f.l_len = COMPAT_OFF_T_MAX;
|
|
if (ret == 0)
|
|
ret = put_compat_flock(&f, compat_ptr(arg));
|
|
}
|
|
break;
|
|
|
|
case F_GETLK64:
|
|
case F_SETLK64:
|
|
case F_SETLKW64:
|
|
ret = get_compat_flock64(&f, compat_ptr(arg));
|
|
if (ret != 0)
|
|
break;
|
|
old_fs = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
|
|
((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
|
|
(unsigned long)&f);
|
|
set_fs(old_fs);
|
|
if (cmd == F_GETLK64 && ret == 0) {
|
|
/* need to return lock information - see above for commentary */
|
|
if (f.l_start > COMPAT_LOFF_T_MAX)
|
|
ret = -EOVERFLOW;
|
|
if (f.l_len > COMPAT_LOFF_T_MAX)
|
|
f.l_len = COMPAT_LOFF_T_MAX;
|
|
if (ret == 0)
|
|
ret = put_compat_flock64(&f, compat_ptr(arg));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ret = sys_fcntl(fd, cmd, arg);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
|
|
return -EINVAL;
|
|
return compat_sys_fcntl64(fd, cmd, arg);
|
|
}
|
|
|
|
asmlinkage long
|
|
compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
|
|
{
|
|
long ret;
|
|
aio_context_t ctx64;
|
|
|
|
mm_segment_t oldfs = get_fs();
|
|
if (unlikely(get_user(ctx64, ctx32p)))
|
|
return -EFAULT;
|
|
|
|
set_fs(KERNEL_DS);
|
|
/* The __user pointer cast is valid because of the set_fs() */
|
|
ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
|
|
set_fs(oldfs);
|
|
/* truncating is ok because it's a user address */
|
|
if (!ret)
|
|
ret = put_user((u32) ctx64, ctx32p);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long
|
|
compat_sys_io_getevents(aio_context_t ctx_id,
|
|
unsigned long min_nr,
|
|
unsigned long nr,
|
|
struct io_event __user *events,
|
|
struct compat_timespec __user *timeout)
|
|
{
|
|
long ret;
|
|
struct timespec t;
|
|
struct timespec __user *ut = NULL;
|
|
|
|
ret = -EFAULT;
|
|
if (unlikely(!access_ok(VERIFY_WRITE, events,
|
|
nr * sizeof(struct io_event))))
|
|
goto out;
|
|
if (timeout) {
|
|
if (get_compat_timespec(&t, timeout))
|
|
goto out;
|
|
|
|
ut = compat_alloc_user_space(sizeof(*ut));
|
|
if (copy_to_user(ut, &t, sizeof(t)) )
|
|
goto out;
|
|
}
|
|
ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/* A write operation does a read from user space and vice versa */
|
|
#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
|
|
|
|
ssize_t compat_rw_copy_check_uvector(int type,
|
|
const struct compat_iovec __user *uvector, unsigned long nr_segs,
|
|
unsigned long fast_segs, struct iovec *fast_pointer,
|
|
struct iovec **ret_pointer, int check_access)
|
|
{
|
|
compat_ssize_t tot_len;
|
|
struct iovec *iov = *ret_pointer = fast_pointer;
|
|
ssize_t ret = 0;
|
|
int seg;
|
|
|
|
/*
|
|
* SuS says "The readv() function *may* fail if the iovcnt argument
|
|
* was less than or equal to 0, or greater than {IOV_MAX}. Linux has
|
|
* traditionally returned zero for zero segments, so...
|
|
*/
|
|
if (nr_segs == 0)
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (nr_segs > UIO_MAXIOV || nr_segs < 0)
|
|
goto out;
|
|
if (nr_segs > fast_segs) {
|
|
ret = -ENOMEM;
|
|
iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
|
|
if (iov == NULL)
|
|
goto out;
|
|
}
|
|
*ret_pointer = iov;
|
|
|
|
/*
|
|
* Single unix specification:
|
|
* We should -EINVAL if an element length is not >= 0 and fitting an
|
|
* ssize_t.
|
|
*
|
|
* In Linux, the total length is limited to MAX_RW_COUNT, there is
|
|
* no overflow possibility.
|
|
*/
|
|
tot_len = 0;
|
|
ret = -EINVAL;
|
|
for (seg = 0; seg < nr_segs; seg++) {
|
|
compat_uptr_t buf;
|
|
compat_ssize_t len;
|
|
|
|
if (__get_user(len, &uvector->iov_len) ||
|
|
__get_user(buf, &uvector->iov_base)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
if (len < 0) /* size_t not fitting in compat_ssize_t .. */
|
|
goto out;
|
|
if (check_access &&
|
|
!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
if (len > MAX_RW_COUNT - tot_len)
|
|
len = MAX_RW_COUNT - tot_len;
|
|
tot_len += len;
|
|
iov->iov_base = compat_ptr(buf);
|
|
iov->iov_len = (compat_size_t) len;
|
|
uvector++;
|
|
iov++;
|
|
}
|
|
ret = tot_len;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static inline long
|
|
copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
|
|
{
|
|
compat_uptr_t uptr;
|
|
int i;
|
|
|
|
for (i = 0; i < nr; ++i) {
|
|
if (get_user(uptr, ptr32 + i))
|
|
return -EFAULT;
|
|
if (put_user(compat_ptr(uptr), ptr64 + i))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
|
|
|
|
asmlinkage long
|
|
compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
|
|
{
|
|
struct iocb __user * __user *iocb64;
|
|
long ret;
|
|
|
|
if (unlikely(nr < 0))
|
|
return -EINVAL;
|
|
|
|
if (nr > MAX_AIO_SUBMITS)
|
|
nr = MAX_AIO_SUBMITS;
|
|
|
|
iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
|
|
ret = copy_iocb(nr, iocb, iocb64);
|
|
if (!ret)
|
|
ret = do_io_submit(ctx_id, nr, iocb64, 1);
|
|
return ret;
|
|
}
|
|
|
|
struct compat_ncp_mount_data {
|
|
compat_int_t version;
|
|
compat_uint_t ncp_fd;
|
|
__compat_uid_t mounted_uid;
|
|
compat_pid_t wdog_pid;
|
|
unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
|
|
compat_uint_t time_out;
|
|
compat_uint_t retry_count;
|
|
compat_uint_t flags;
|
|
__compat_uid_t uid;
|
|
__compat_gid_t gid;
|
|
compat_mode_t file_mode;
|
|
compat_mode_t dir_mode;
|
|
};
|
|
|
|
struct compat_ncp_mount_data_v4 {
|
|
compat_int_t version;
|
|
compat_ulong_t flags;
|
|
compat_ulong_t mounted_uid;
|
|
compat_long_t wdog_pid;
|
|
compat_uint_t ncp_fd;
|
|
compat_uint_t time_out;
|
|
compat_uint_t retry_count;
|
|
compat_ulong_t uid;
|
|
compat_ulong_t gid;
|
|
compat_ulong_t file_mode;
|
|
compat_ulong_t dir_mode;
|
|
};
|
|
|
|
static void *do_ncp_super_data_conv(void *raw_data)
|
|
{
|
|
int version = *(unsigned int *)raw_data;
|
|
|
|
if (version == 3) {
|
|
struct compat_ncp_mount_data *c_n = raw_data;
|
|
struct ncp_mount_data *n = raw_data;
|
|
|
|
n->dir_mode = c_n->dir_mode;
|
|
n->file_mode = c_n->file_mode;
|
|
n->gid = c_n->gid;
|
|
n->uid = c_n->uid;
|
|
memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
|
|
n->wdog_pid = c_n->wdog_pid;
|
|
n->mounted_uid = c_n->mounted_uid;
|
|
} else if (version == 4) {
|
|
struct compat_ncp_mount_data_v4 *c_n = raw_data;
|
|
struct ncp_mount_data_v4 *n = raw_data;
|
|
|
|
n->dir_mode = c_n->dir_mode;
|
|
n->file_mode = c_n->file_mode;
|
|
n->gid = c_n->gid;
|
|
n->uid = c_n->uid;
|
|
n->retry_count = c_n->retry_count;
|
|
n->time_out = c_n->time_out;
|
|
n->ncp_fd = c_n->ncp_fd;
|
|
n->wdog_pid = c_n->wdog_pid;
|
|
n->mounted_uid = c_n->mounted_uid;
|
|
n->flags = c_n->flags;
|
|
} else if (version != 5) {
|
|
return NULL;
|
|
}
|
|
|
|
return raw_data;
|
|
}
|
|
|
|
|
|
struct compat_nfs_string {
|
|
compat_uint_t len;
|
|
compat_uptr_t data;
|
|
};
|
|
|
|
static inline void compat_nfs_string(struct nfs_string *dst,
|
|
struct compat_nfs_string *src)
|
|
{
|
|
dst->data = compat_ptr(src->data);
|
|
dst->len = src->len;
|
|
}
|
|
|
|
struct compat_nfs4_mount_data_v1 {
|
|
compat_int_t version;
|
|
compat_int_t flags;
|
|
compat_int_t rsize;
|
|
compat_int_t wsize;
|
|
compat_int_t timeo;
|
|
compat_int_t retrans;
|
|
compat_int_t acregmin;
|
|
compat_int_t acregmax;
|
|
compat_int_t acdirmin;
|
|
compat_int_t acdirmax;
|
|
struct compat_nfs_string client_addr;
|
|
struct compat_nfs_string mnt_path;
|
|
struct compat_nfs_string hostname;
|
|
compat_uint_t host_addrlen;
|
|
compat_uptr_t host_addr;
|
|
compat_int_t proto;
|
|
compat_int_t auth_flavourlen;
|
|
compat_uptr_t auth_flavours;
|
|
};
|
|
|
|
static int do_nfs4_super_data_conv(void *raw_data)
|
|
{
|
|
int version = *(compat_uint_t *) raw_data;
|
|
|
|
if (version == 1) {
|
|
struct compat_nfs4_mount_data_v1 *raw = raw_data;
|
|
struct nfs4_mount_data *real = raw_data;
|
|
|
|
/* copy the fields backwards */
|
|
real->auth_flavours = compat_ptr(raw->auth_flavours);
|
|
real->auth_flavourlen = raw->auth_flavourlen;
|
|
real->proto = raw->proto;
|
|
real->host_addr = compat_ptr(raw->host_addr);
|
|
real->host_addrlen = raw->host_addrlen;
|
|
compat_nfs_string(&real->hostname, &raw->hostname);
|
|
compat_nfs_string(&real->mnt_path, &raw->mnt_path);
|
|
compat_nfs_string(&real->client_addr, &raw->client_addr);
|
|
real->acdirmax = raw->acdirmax;
|
|
real->acdirmin = raw->acdirmin;
|
|
real->acregmax = raw->acregmax;
|
|
real->acregmin = raw->acregmin;
|
|
real->retrans = raw->retrans;
|
|
real->timeo = raw->timeo;
|
|
real->wsize = raw->wsize;
|
|
real->rsize = raw->rsize;
|
|
real->flags = raw->flags;
|
|
real->version = raw->version;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define NCPFS_NAME "ncpfs"
|
|
#define NFS4_NAME "nfs4"
|
|
|
|
asmlinkage long compat_sys_mount(const char __user * dev_name,
|
|
const char __user * dir_name,
|
|
const char __user * type, unsigned long flags,
|
|
const void __user * data)
|
|
{
|
|
char *kernel_type;
|
|
unsigned long data_page;
|
|
char *kernel_dev;
|
|
char *dir_page;
|
|
int retval;
|
|
|
|
retval = copy_mount_string(type, &kernel_type);
|
|
if (retval < 0)
|
|
goto out;
|
|
|
|
dir_page = getname(dir_name);
|
|
retval = PTR_ERR(dir_page);
|
|
if (IS_ERR(dir_page))
|
|
goto out1;
|
|
|
|
retval = copy_mount_string(dev_name, &kernel_dev);
|
|
if (retval < 0)
|
|
goto out2;
|
|
|
|
retval = copy_mount_options(data, &data_page);
|
|
if (retval < 0)
|
|
goto out3;
|
|
|
|
retval = -EINVAL;
|
|
|
|
if (kernel_type && data_page) {
|
|
if (!strcmp(kernel_type, NCPFS_NAME)) {
|
|
do_ncp_super_data_conv((void *)data_page);
|
|
} else if (!strcmp(kernel_type, NFS4_NAME)) {
|
|
if (do_nfs4_super_data_conv((void *) data_page))
|
|
goto out4;
|
|
}
|
|
}
|
|
|
|
retval = do_mount(kernel_dev, dir_page, kernel_type,
|
|
flags, (void*)data_page);
|
|
|
|
out4:
|
|
free_page(data_page);
|
|
out3:
|
|
kfree(kernel_dev);
|
|
out2:
|
|
putname(dir_page);
|
|
out1:
|
|
kfree(kernel_type);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
struct compat_old_linux_dirent {
|
|
compat_ulong_t d_ino;
|
|
compat_ulong_t d_offset;
|
|
unsigned short d_namlen;
|
|
char d_name[1];
|
|
};
|
|
|
|
struct compat_readdir_callback {
|
|
struct compat_old_linux_dirent __user *dirent;
|
|
int result;
|
|
};
|
|
|
|
static int compat_fillonedir(void *__buf, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct compat_readdir_callback *buf = __buf;
|
|
struct compat_old_linux_dirent __user *dirent;
|
|
compat_ulong_t d_ino;
|
|
|
|
if (buf->result)
|
|
return -EINVAL;
|
|
d_ino = ino;
|
|
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
|
|
buf->result = -EOVERFLOW;
|
|
return -EOVERFLOW;
|
|
}
|
|
buf->result++;
|
|
dirent = buf->dirent;
|
|
if (!access_ok(VERIFY_WRITE, dirent,
|
|
(unsigned long)(dirent->d_name + namlen + 1) -
|
|
(unsigned long)dirent))
|
|
goto efault;
|
|
if ( __put_user(d_ino, &dirent->d_ino) ||
|
|
__put_user(offset, &dirent->d_offset) ||
|
|
__put_user(namlen, &dirent->d_namlen) ||
|
|
__copy_to_user(dirent->d_name, name, namlen) ||
|
|
__put_user(0, dirent->d_name + namlen))
|
|
goto efault;
|
|
return 0;
|
|
efault:
|
|
buf->result = -EFAULT;
|
|
return -EFAULT;
|
|
}
|
|
|
|
asmlinkage long compat_sys_old_readdir(unsigned int fd,
|
|
struct compat_old_linux_dirent __user *dirent, unsigned int count)
|
|
{
|
|
int error;
|
|
struct file *file;
|
|
struct compat_readdir_callback buf;
|
|
|
|
error = -EBADF;
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
|
|
buf.result = 0;
|
|
buf.dirent = dirent;
|
|
|
|
error = vfs_readdir(file, compat_fillonedir, &buf);
|
|
if (buf.result)
|
|
error = buf.result;
|
|
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
struct compat_linux_dirent {
|
|
compat_ulong_t d_ino;
|
|
compat_ulong_t d_off;
|
|
unsigned short d_reclen;
|
|
char d_name[1];
|
|
};
|
|
|
|
struct compat_getdents_callback {
|
|
struct compat_linux_dirent __user *current_dir;
|
|
struct compat_linux_dirent __user *previous;
|
|
int count;
|
|
int error;
|
|
};
|
|
|
|
static int compat_filldir(void *__buf, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct compat_linux_dirent __user * dirent;
|
|
struct compat_getdents_callback *buf = __buf;
|
|
compat_ulong_t d_ino;
|
|
int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
|
|
namlen + 2, sizeof(compat_long_t));
|
|
|
|
buf->error = -EINVAL; /* only used if we fail.. */
|
|
if (reclen > buf->count)
|
|
return -EINVAL;
|
|
d_ino = ino;
|
|
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
|
|
buf->error = -EOVERFLOW;
|
|
return -EOVERFLOW;
|
|
}
|
|
dirent = buf->previous;
|
|
if (dirent) {
|
|
if (__put_user(offset, &dirent->d_off))
|
|
goto efault;
|
|
}
|
|
dirent = buf->current_dir;
|
|
if (__put_user(d_ino, &dirent->d_ino))
|
|
goto efault;
|
|
if (__put_user(reclen, &dirent->d_reclen))
|
|
goto efault;
|
|
if (copy_to_user(dirent->d_name, name, namlen))
|
|
goto efault;
|
|
if (__put_user(0, dirent->d_name + namlen))
|
|
goto efault;
|
|
if (__put_user(d_type, (char __user *) dirent + reclen - 1))
|
|
goto efault;
|
|
buf->previous = dirent;
|
|
dirent = (void __user *)dirent + reclen;
|
|
buf->current_dir = dirent;
|
|
buf->count -= reclen;
|
|
return 0;
|
|
efault:
|
|
buf->error = -EFAULT;
|
|
return -EFAULT;
|
|
}
|
|
|
|
asmlinkage long compat_sys_getdents(unsigned int fd,
|
|
struct compat_linux_dirent __user *dirent, unsigned int count)
|
|
{
|
|
struct file * file;
|
|
struct compat_linux_dirent __user * lastdirent;
|
|
struct compat_getdents_callback buf;
|
|
int error;
|
|
|
|
error = -EFAULT;
|
|
if (!access_ok(VERIFY_WRITE, dirent, count))
|
|
goto out;
|
|
|
|
error = -EBADF;
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
|
|
buf.current_dir = dirent;
|
|
buf.previous = NULL;
|
|
buf.count = count;
|
|
buf.error = 0;
|
|
|
|
error = vfs_readdir(file, compat_filldir, &buf);
|
|
if (error >= 0)
|
|
error = buf.error;
|
|
lastdirent = buf.previous;
|
|
if (lastdirent) {
|
|
if (put_user(file->f_pos, &lastdirent->d_off))
|
|
error = -EFAULT;
|
|
else
|
|
error = count - buf.count;
|
|
}
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
|
|
|
|
struct compat_getdents_callback64 {
|
|
struct linux_dirent64 __user *current_dir;
|
|
struct linux_dirent64 __user *previous;
|
|
int count;
|
|
int error;
|
|
};
|
|
|
|
static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
|
|
u64 ino, unsigned int d_type)
|
|
{
|
|
struct linux_dirent64 __user *dirent;
|
|
struct compat_getdents_callback64 *buf = __buf;
|
|
int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
|
|
sizeof(u64));
|
|
u64 off;
|
|
|
|
buf->error = -EINVAL; /* only used if we fail.. */
|
|
if (reclen > buf->count)
|
|
return -EINVAL;
|
|
dirent = buf->previous;
|
|
|
|
if (dirent) {
|
|
if (__put_user_unaligned(offset, &dirent->d_off))
|
|
goto efault;
|
|
}
|
|
dirent = buf->current_dir;
|
|
if (__put_user_unaligned(ino, &dirent->d_ino))
|
|
goto efault;
|
|
off = 0;
|
|
if (__put_user_unaligned(off, &dirent->d_off))
|
|
goto efault;
|
|
if (__put_user(reclen, &dirent->d_reclen))
|
|
goto efault;
|
|
if (__put_user(d_type, &dirent->d_type))
|
|
goto efault;
|
|
if (copy_to_user(dirent->d_name, name, namlen))
|
|
goto efault;
|
|
if (__put_user(0, dirent->d_name + namlen))
|
|
goto efault;
|
|
buf->previous = dirent;
|
|
dirent = (void __user *)dirent + reclen;
|
|
buf->current_dir = dirent;
|
|
buf->count -= reclen;
|
|
return 0;
|
|
efault:
|
|
buf->error = -EFAULT;
|
|
return -EFAULT;
|
|
}
|
|
|
|
asmlinkage long compat_sys_getdents64(unsigned int fd,
|
|
struct linux_dirent64 __user * dirent, unsigned int count)
|
|
{
|
|
struct file * file;
|
|
struct linux_dirent64 __user * lastdirent;
|
|
struct compat_getdents_callback64 buf;
|
|
int error;
|
|
|
|
error = -EFAULT;
|
|
if (!access_ok(VERIFY_WRITE, dirent, count))
|
|
goto out;
|
|
|
|
error = -EBADF;
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
|
|
buf.current_dir = dirent;
|
|
buf.previous = NULL;
|
|
buf.count = count;
|
|
buf.error = 0;
|
|
|
|
error = vfs_readdir(file, compat_filldir64, &buf);
|
|
if (error >= 0)
|
|
error = buf.error;
|
|
lastdirent = buf.previous;
|
|
if (lastdirent) {
|
|
typeof(lastdirent->d_off) d_off = file->f_pos;
|
|
if (__put_user_unaligned(d_off, &lastdirent->d_off))
|
|
error = -EFAULT;
|
|
else
|
|
error = count - buf.count;
|
|
}
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
|
|
|
|
static ssize_t compat_do_readv_writev(int type, struct file *file,
|
|
const struct compat_iovec __user *uvector,
|
|
unsigned long nr_segs, loff_t *pos)
|
|
{
|
|
compat_ssize_t tot_len;
|
|
struct iovec iovstack[UIO_FASTIOV];
|
|
struct iovec *iov = iovstack;
|
|
ssize_t ret;
|
|
io_fn_t fn;
|
|
iov_fn_t fnv;
|
|
|
|
ret = -EINVAL;
|
|
if (!file->f_op)
|
|
goto out;
|
|
|
|
ret = -EFAULT;
|
|
if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
|
|
goto out;
|
|
|
|
tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
|
|
UIO_FASTIOV, iovstack, &iov, 1);
|
|
if (tot_len == 0) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
ret = rw_verify_area(type, file, pos, tot_len);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
fnv = NULL;
|
|
if (type == READ) {
|
|
fn = file->f_op->read;
|
|
fnv = file->f_op->aio_read;
|
|
} else {
|
|
fn = (io_fn_t)file->f_op->write;
|
|
fnv = file->f_op->aio_write;
|
|
}
|
|
|
|
if (fnv)
|
|
ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
|
|
pos, fnv);
|
|
else
|
|
ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
|
|
|
|
out:
|
|
if (iov != iovstack)
|
|
kfree(iov);
|
|
if ((ret + (type == READ)) > 0) {
|
|
if (type == READ)
|
|
fsnotify_access(file);
|
|
else
|
|
fsnotify_modify(file);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static size_t compat_readv(struct file *file,
|
|
const struct compat_iovec __user *vec,
|
|
unsigned long vlen, loff_t *pos)
|
|
{
|
|
ssize_t ret = -EBADF;
|
|
|
|
if (!(file->f_mode & FMODE_READ))
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
|
|
goto out;
|
|
|
|
ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
|
|
|
|
out:
|
|
if (ret > 0)
|
|
add_rchar(current, ret);
|
|
inc_syscr(current);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen)
|
|
{
|
|
struct file *file;
|
|
int fput_needed;
|
|
ssize_t ret;
|
|
|
|
file = fget_light(fd, &fput_needed);
|
|
if (!file)
|
|
return -EBADF;
|
|
ret = compat_readv(file, vec, vlen, &file->f_pos);
|
|
fput_light(file, fput_needed);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen, loff_t pos)
|
|
{
|
|
struct file *file;
|
|
int fput_needed;
|
|
ssize_t ret;
|
|
|
|
if (pos < 0)
|
|
return -EINVAL;
|
|
file = fget_light(fd, &fput_needed);
|
|
if (!file)
|
|
return -EBADF;
|
|
ret = -ESPIPE;
|
|
if (file->f_mode & FMODE_PREAD)
|
|
ret = compat_readv(file, vec, vlen, &pos);
|
|
fput_light(file, fput_needed);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen, u32 pos_low, u32 pos_high)
|
|
{
|
|
loff_t pos = ((loff_t)pos_high << 32) | pos_low;
|
|
return compat_sys_preadv64(fd, vec, vlen, pos);
|
|
}
|
|
|
|
static size_t compat_writev(struct file *file,
|
|
const struct compat_iovec __user *vec,
|
|
unsigned long vlen, loff_t *pos)
|
|
{
|
|
ssize_t ret = -EBADF;
|
|
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
|
|
goto out;
|
|
|
|
ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
|
|
|
|
out:
|
|
if (ret > 0)
|
|
add_wchar(current, ret);
|
|
inc_syscw(current);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen)
|
|
{
|
|
struct file *file;
|
|
int fput_needed;
|
|
ssize_t ret;
|
|
|
|
file = fget_light(fd, &fput_needed);
|
|
if (!file)
|
|
return -EBADF;
|
|
ret = compat_writev(file, vec, vlen, &file->f_pos);
|
|
fput_light(file, fput_needed);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen, loff_t pos)
|
|
{
|
|
struct file *file;
|
|
int fput_needed;
|
|
ssize_t ret;
|
|
|
|
if (pos < 0)
|
|
return -EINVAL;
|
|
file = fget_light(fd, &fput_needed);
|
|
if (!file)
|
|
return -EBADF;
|
|
ret = -ESPIPE;
|
|
if (file->f_mode & FMODE_PWRITE)
|
|
ret = compat_writev(file, vec, vlen, &pos);
|
|
fput_light(file, fput_needed);
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage ssize_t
|
|
compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
|
|
unsigned long vlen, u32 pos_low, u32 pos_high)
|
|
{
|
|
loff_t pos = ((loff_t)pos_high << 32) | pos_low;
|
|
return compat_sys_pwritev64(fd, vec, vlen, pos);
|
|
}
|
|
|
|
asmlinkage long
|
|
compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
|
|
unsigned int nr_segs, unsigned int flags)
|
|
{
|
|
unsigned i;
|
|
struct iovec __user *iov;
|
|
if (nr_segs > UIO_MAXIOV)
|
|
return -EINVAL;
|
|
iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
|
|
for (i = 0; i < nr_segs; i++) {
|
|
struct compat_iovec v;
|
|
if (get_user(v.iov_base, &iov32[i].iov_base) ||
|
|
get_user(v.iov_len, &iov32[i].iov_len) ||
|
|
put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
|
|
put_user(v.iov_len, &iov[i].iov_len))
|
|
return -EFAULT;
|
|
}
|
|
return sys_vmsplice(fd, iov, nr_segs, flags);
|
|
}
|
|
|
|
/*
|
|
* Exactly like fs/open.c:sys_open(), except that it doesn't set the
|
|
* O_LARGEFILE flag.
|
|
*/
|
|
asmlinkage long
|
|
compat_sys_open(const char __user *filename, int flags, umode_t mode)
|
|
{
|
|
return do_sys_open(AT_FDCWD, filename, flags, mode);
|
|
}
|
|
|
|
/*
|
|
* Exactly like fs/open.c:sys_openat(), except that it doesn't set the
|
|
* O_LARGEFILE flag.
|
|
*/
|
|
asmlinkage long
|
|
compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, umode_t mode)
|
|
{
|
|
return do_sys_open(dfd, filename, flags, mode);
|
|
}
|
|
|
|
#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
|
|
|
|
static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
|
|
int timeval, int ret)
|
|
{
|
|
struct timespec ts;
|
|
|
|
if (!p)
|
|
return ret;
|
|
|
|
if (current->personality & STICKY_TIMEOUTS)
|
|
goto sticky;
|
|
|
|
/* No update for zero timeout */
|
|
if (!end_time->tv_sec && !end_time->tv_nsec)
|
|
return ret;
|
|
|
|
ktime_get_ts(&ts);
|
|
ts = timespec_sub(*end_time, ts);
|
|
if (ts.tv_sec < 0)
|
|
ts.tv_sec = ts.tv_nsec = 0;
|
|
|
|
if (timeval) {
|
|
struct compat_timeval rtv;
|
|
|
|
rtv.tv_sec = ts.tv_sec;
|
|
rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
|
|
|
|
if (!copy_to_user(p, &rtv, sizeof(rtv)))
|
|
return ret;
|
|
} else {
|
|
struct compat_timespec rts;
|
|
|
|
rts.tv_sec = ts.tv_sec;
|
|
rts.tv_nsec = ts.tv_nsec;
|
|
|
|
if (!copy_to_user(p, &rts, sizeof(rts)))
|
|
return ret;
|
|
}
|
|
/*
|
|
* If an application puts its timeval in read-only memory, we
|
|
* don't want the Linux-specific update to the timeval to
|
|
* cause a fault after the select has completed
|
|
* successfully. However, because we're not updating the
|
|
* timeval, we can't restart the system call.
|
|
*/
|
|
|
|
sticky:
|
|
if (ret == -ERESTARTNOHAND)
|
|
ret = -EINTR;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Ooo, nasty. We need here to frob 32-bit unsigned longs to
|
|
* 64-bit unsigned longs.
|
|
*/
|
|
static
|
|
int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
|
|
unsigned long *fdset)
|
|
{
|
|
nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
|
|
if (ufdset) {
|
|
unsigned long odd;
|
|
|
|
if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
|
|
return -EFAULT;
|
|
|
|
odd = nr & 1UL;
|
|
nr &= ~1UL;
|
|
while (nr) {
|
|
unsigned long h, l;
|
|
if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
|
|
return -EFAULT;
|
|
ufdset += 2;
|
|
*fdset++ = h << 32 | l;
|
|
nr -= 2;
|
|
}
|
|
if (odd && __get_user(*fdset, ufdset))
|
|
return -EFAULT;
|
|
} else {
|
|
/* Tricky, must clear full unsigned long in the
|
|
* kernel fdset at the end, this makes sure that
|
|
* actually happens.
|
|
*/
|
|
memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
|
|
unsigned long *fdset)
|
|
{
|
|
unsigned long odd;
|
|
nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
|
|
|
|
if (!ufdset)
|
|
return 0;
|
|
|
|
odd = nr & 1UL;
|
|
nr &= ~1UL;
|
|
while (nr) {
|
|
unsigned long h, l;
|
|
l = *fdset++;
|
|
h = l >> 32;
|
|
if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
|
|
return -EFAULT;
|
|
ufdset += 2;
|
|
nr -= 2;
|
|
}
|
|
if (odd && __put_user(*fdset, ufdset))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* This is a virtual copy of sys_select from fs/select.c and probably
|
|
* should be compared to it from time to time
|
|
*/
|
|
|
|
/*
|
|
* We can actually return ERESTARTSYS instead of EINTR, but I'd
|
|
* like to be certain this leads to no problems. So I return
|
|
* EINTR just for safety.
|
|
*
|
|
* Update: ERESTARTSYS breaks at least the xview clock binary, so
|
|
* I'm trying ERESTARTNOHAND which restart only when you want to.
|
|
*/
|
|
int compat_core_sys_select(int n, compat_ulong_t __user *inp,
|
|
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
|
|
struct timespec *end_time)
|
|
{
|
|
fd_set_bits fds;
|
|
void *bits;
|
|
int size, max_fds, ret = -EINVAL;
|
|
struct fdtable *fdt;
|
|
long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
|
|
|
|
if (n < 0)
|
|
goto out_nofds;
|
|
|
|
/* max_fds can increase, so grab it once to avoid race */
|
|
rcu_read_lock();
|
|
fdt = files_fdtable(current->files);
|
|
max_fds = fdt->max_fds;
|
|
rcu_read_unlock();
|
|
if (n > max_fds)
|
|
n = max_fds;
|
|
|
|
/*
|
|
* We need 6 bitmaps (in/out/ex for both incoming and outgoing),
|
|
* since we used fdset we need to allocate memory in units of
|
|
* long-words.
|
|
*/
|
|
size = FDS_BYTES(n);
|
|
bits = stack_fds;
|
|
if (size > sizeof(stack_fds) / 6) {
|
|
bits = kmalloc(6 * size, GFP_KERNEL);
|
|
ret = -ENOMEM;
|
|
if (!bits)
|
|
goto out_nofds;
|
|
}
|
|
fds.in = (unsigned long *) bits;
|
|
fds.out = (unsigned long *) (bits + size);
|
|
fds.ex = (unsigned long *) (bits + 2*size);
|
|
fds.res_in = (unsigned long *) (bits + 3*size);
|
|
fds.res_out = (unsigned long *) (bits + 4*size);
|
|
fds.res_ex = (unsigned long *) (bits + 5*size);
|
|
|
|
if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
|
|
(ret = compat_get_fd_set(n, outp, fds.out)) ||
|
|
(ret = compat_get_fd_set(n, exp, fds.ex)))
|
|
goto out;
|
|
zero_fd_set(n, fds.res_in);
|
|
zero_fd_set(n, fds.res_out);
|
|
zero_fd_set(n, fds.res_ex);
|
|
|
|
ret = do_select(n, &fds, end_time);
|
|
|
|
if (ret < 0)
|
|
goto out;
|
|
if (!ret) {
|
|
ret = -ERESTARTNOHAND;
|
|
if (signal_pending(current))
|
|
goto out;
|
|
ret = 0;
|
|
}
|
|
|
|
if (compat_set_fd_set(n, inp, fds.res_in) ||
|
|
compat_set_fd_set(n, outp, fds.res_out) ||
|
|
compat_set_fd_set(n, exp, fds.res_ex))
|
|
ret = -EFAULT;
|
|
out:
|
|
if (bits != stack_fds)
|
|
kfree(bits);
|
|
out_nofds:
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
|
|
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
|
|
struct compat_timeval __user *tvp)
|
|
{
|
|
struct timespec end_time, *to = NULL;
|
|
struct compat_timeval tv;
|
|
int ret;
|
|
|
|
if (tvp) {
|
|
if (copy_from_user(&tv, tvp, sizeof(tv)))
|
|
return -EFAULT;
|
|
|
|
to = &end_time;
|
|
if (poll_select_set_timeout(to,
|
|
tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
|
|
(tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = compat_core_sys_select(n, inp, outp, exp, to);
|
|
ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct compat_sel_arg_struct {
|
|
compat_ulong_t n;
|
|
compat_uptr_t inp;
|
|
compat_uptr_t outp;
|
|
compat_uptr_t exp;
|
|
compat_uptr_t tvp;
|
|
};
|
|
|
|
asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
|
|
{
|
|
struct compat_sel_arg_struct a;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
return -EFAULT;
|
|
return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
|
|
compat_ptr(a.exp), compat_ptr(a.tvp));
|
|
}
|
|
|
|
#ifdef HAVE_SET_RESTORE_SIGMASK
|
|
static long do_compat_pselect(int n, compat_ulong_t __user *inp,
|
|
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
|
|
struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
|
|
compat_size_t sigsetsize)
|
|
{
|
|
compat_sigset_t ss32;
|
|
sigset_t ksigmask, sigsaved;
|
|
struct compat_timespec ts;
|
|
struct timespec end_time, *to = NULL;
|
|
int ret;
|
|
|
|
if (tsp) {
|
|
if (copy_from_user(&ts, tsp, sizeof(ts)))
|
|
return -EFAULT;
|
|
|
|
to = &end_time;
|
|
if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (sigmask) {
|
|
if (sigsetsize != sizeof(compat_sigset_t))
|
|
return -EINVAL;
|
|
if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
|
|
return -EFAULT;
|
|
sigset_from_compat(&ksigmask, &ss32);
|
|
|
|
sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
|
|
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
|
|
}
|
|
|
|
ret = compat_core_sys_select(n, inp, outp, exp, to);
|
|
ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
|
|
|
|
if (ret == -ERESTARTNOHAND) {
|
|
/*
|
|
* Don't restore the signal mask yet. Let do_signal() deliver
|
|
* the signal on the way back to userspace, before the signal
|
|
* mask is restored.
|
|
*/
|
|
if (sigmask) {
|
|
memcpy(¤t->saved_sigmask, &sigsaved,
|
|
sizeof(sigsaved));
|
|
set_restore_sigmask();
|
|
}
|
|
} else if (sigmask)
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
|
|
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
|
|
struct compat_timespec __user *tsp, void __user *sig)
|
|
{
|
|
compat_size_t sigsetsize = 0;
|
|
compat_uptr_t up = 0;
|
|
|
|
if (sig) {
|
|
if (!access_ok(VERIFY_READ, sig,
|
|
sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
|
|
__get_user(up, (compat_uptr_t __user *)sig) ||
|
|
__get_user(sigsetsize,
|
|
(compat_size_t __user *)(sig+sizeof(up))))
|
|
return -EFAULT;
|
|
}
|
|
return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
|
|
sigsetsize);
|
|
}
|
|
|
|
asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
|
|
unsigned int nfds, struct compat_timespec __user *tsp,
|
|
const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
|
|
{
|
|
compat_sigset_t ss32;
|
|
sigset_t ksigmask, sigsaved;
|
|
struct compat_timespec ts;
|
|
struct timespec end_time, *to = NULL;
|
|
int ret;
|
|
|
|
if (tsp) {
|
|
if (copy_from_user(&ts, tsp, sizeof(ts)))
|
|
return -EFAULT;
|
|
|
|
to = &end_time;
|
|
if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (sigmask) {
|
|
if (sigsetsize != sizeof(compat_sigset_t))
|
|
return -EINVAL;
|
|
if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
|
|
return -EFAULT;
|
|
sigset_from_compat(&ksigmask, &ss32);
|
|
|
|
sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
|
|
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
|
|
}
|
|
|
|
ret = do_sys_poll(ufds, nfds, to);
|
|
|
|
/* We can restart this syscall, usually */
|
|
if (ret == -EINTR) {
|
|
/*
|
|
* Don't restore the signal mask yet. Let do_signal() deliver
|
|
* the signal on the way back to userspace, before the signal
|
|
* mask is restored.
|
|
*/
|
|
if (sigmask) {
|
|
memcpy(¤t->saved_sigmask, &sigsaved,
|
|
sizeof(sigsaved));
|
|
set_restore_sigmask();
|
|
}
|
|
ret = -ERESTARTNOHAND;
|
|
} else if (sigmask)
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
|
|
|
|
return ret;
|
|
}
|
|
#endif /* HAVE_SET_RESTORE_SIGMASK */
|
|
|
|
#ifdef CONFIG_EPOLL
|
|
|
|
#ifdef HAVE_SET_RESTORE_SIGMASK
|
|
asmlinkage long compat_sys_epoll_pwait(int epfd,
|
|
struct compat_epoll_event __user *events,
|
|
int maxevents, int timeout,
|
|
const compat_sigset_t __user *sigmask,
|
|
compat_size_t sigsetsize)
|
|
{
|
|
long err;
|
|
compat_sigset_t csigmask;
|
|
sigset_t ksigmask, sigsaved;
|
|
|
|
/*
|
|
* If the caller wants a certain signal mask to be set during the wait,
|
|
* we apply it here.
|
|
*/
|
|
if (sigmask) {
|
|
if (sigsetsize != sizeof(compat_sigset_t))
|
|
return -EINVAL;
|
|
if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
|
|
return -EFAULT;
|
|
sigset_from_compat(&ksigmask, &csigmask);
|
|
sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
|
|
sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
|
|
}
|
|
|
|
err = sys_epoll_wait(epfd, events, maxevents, timeout);
|
|
|
|
/*
|
|
* If we changed the signal mask, we need to restore the original one.
|
|
* In case we've got a signal while waiting, we do not restore the
|
|
* signal mask yet, and we allow do_signal() to deliver the signal on
|
|
* the way back to userspace, before the signal mask is restored.
|
|
*/
|
|
if (sigmask) {
|
|
if (err == -EINTR) {
|
|
memcpy(¤t->saved_sigmask, &sigsaved,
|
|
sizeof(sigsaved));
|
|
set_restore_sigmask();
|
|
} else
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
#endif /* HAVE_SET_RESTORE_SIGMASK */
|
|
|
|
#endif /* CONFIG_EPOLL */
|
|
|
|
#ifdef CONFIG_SIGNALFD
|
|
|
|
asmlinkage long compat_sys_signalfd4(int ufd,
|
|
const compat_sigset_t __user *sigmask,
|
|
compat_size_t sigsetsize, int flags)
|
|
{
|
|
compat_sigset_t ss32;
|
|
sigset_t tmp;
|
|
sigset_t __user *ksigmask;
|
|
|
|
if (sigsetsize != sizeof(compat_sigset_t))
|
|
return -EINVAL;
|
|
if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
|
|
return -EFAULT;
|
|
sigset_from_compat(&tmp, &ss32);
|
|
ksigmask = compat_alloc_user_space(sizeof(sigset_t));
|
|
if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
|
|
return -EFAULT;
|
|
|
|
return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
|
|
}
|
|
|
|
asmlinkage long compat_sys_signalfd(int ufd,
|
|
const compat_sigset_t __user *sigmask,
|
|
compat_size_t sigsetsize)
|
|
{
|
|
return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
|
|
}
|
|
#endif /* CONFIG_SIGNALFD */
|
|
|
|
#ifdef CONFIG_TIMERFD
|
|
|
|
asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
|
|
const struct compat_itimerspec __user *utmr,
|
|
struct compat_itimerspec __user *otmr)
|
|
{
|
|
int error;
|
|
struct itimerspec t;
|
|
struct itimerspec __user *ut;
|
|
|
|
if (get_compat_itimerspec(&t, utmr))
|
|
return -EFAULT;
|
|
ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
|
|
if (copy_to_user(&ut[0], &t, sizeof(t)))
|
|
return -EFAULT;
|
|
error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
|
|
if (!error && otmr)
|
|
error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
|
|
put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long compat_sys_timerfd_gettime(int ufd,
|
|
struct compat_itimerspec __user *otmr)
|
|
{
|
|
int error;
|
|
struct itimerspec t;
|
|
struct itimerspec __user *ut;
|
|
|
|
ut = compat_alloc_user_space(sizeof(struct itimerspec));
|
|
error = sys_timerfd_gettime(ufd, ut);
|
|
if (!error)
|
|
error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
|
|
put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
#endif /* CONFIG_TIMERFD */
|
|
|
|
#ifdef CONFIG_FHANDLE
|
|
/*
|
|
* Exactly like fs/open.c:sys_open_by_handle_at(), except that it
|
|
* doesn't set the O_LARGEFILE flag.
|
|
*/
|
|
asmlinkage long
|
|
compat_sys_open_by_handle_at(int mountdirfd,
|
|
struct file_handle __user *handle, int flags)
|
|
{
|
|
return do_handle_open(mountdirfd, handle, flags);
|
|
}
|
|
#endif
|