Get rid of calling Linux stat translation hook and specific to Linux handling of non-vnode dirfd from kern_statat(), Reviewed by: kib, mjg Differential revision: https://reviews.freebsd.org/D35474
2112 lines
52 KiB
C
2112 lines
52 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1994-1995 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/dirent.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/lock.h>
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#include <sys/mman.h>
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#include <sys/selinfo.h>
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#include <sys/pipe.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <sys/sx.h>
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#include <sys/syscallsubr.h>
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#include <sys/tty.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#ifdef COMPAT_LINUX32
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#include <compat/freebsd32/freebsd32_misc.h>
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#include <machine/../linux32/linux.h>
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#include <machine/../linux32/linux32_proto.h>
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#else
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#include <machine/../linux/linux.h>
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#include <machine/../linux/linux_proto.h>
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#endif
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#include <compat/linux/linux_misc.h>
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#include <compat/linux/linux_util.h>
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#include <compat/linux/linux_file.h>
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|
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static int linux_common_open(struct thread *, int, const char *, int, int,
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enum uio_seg);
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static int linux_do_accessat(struct thread *t, int, const char *, int, int);
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static int linux_getdents_error(struct thread *, int, int);
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static struct bsd_to_linux_bitmap seal_bitmap[] = {
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BITMAP_1t1_LINUX(F_SEAL_SEAL),
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BITMAP_1t1_LINUX(F_SEAL_SHRINK),
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BITMAP_1t1_LINUX(F_SEAL_GROW),
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BITMAP_1t1_LINUX(F_SEAL_WRITE),
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};
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#define MFD_HUGETLB_ENTRY(_size) \
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{ \
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.bsd_value = MFD_HUGE_##_size, \
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.linux_value = LINUX_HUGETLB_FLAG_ENCODE_##_size \
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}
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static struct bsd_to_linux_bitmap mfd_bitmap[] = {
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BITMAP_1t1_LINUX(MFD_CLOEXEC),
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BITMAP_1t1_LINUX(MFD_ALLOW_SEALING),
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BITMAP_1t1_LINUX(MFD_HUGETLB),
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MFD_HUGETLB_ENTRY(64KB),
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MFD_HUGETLB_ENTRY(512KB),
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MFD_HUGETLB_ENTRY(1MB),
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MFD_HUGETLB_ENTRY(2MB),
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MFD_HUGETLB_ENTRY(8MB),
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MFD_HUGETLB_ENTRY(16MB),
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MFD_HUGETLB_ENTRY(32MB),
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MFD_HUGETLB_ENTRY(256MB),
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MFD_HUGETLB_ENTRY(512MB),
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MFD_HUGETLB_ENTRY(1GB),
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MFD_HUGETLB_ENTRY(2GB),
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MFD_HUGETLB_ENTRY(16GB),
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};
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#undef MFD_HUGETLB_ENTRY
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#ifdef LINUX_LEGACY_SYSCALLS
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int
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linux_creat(struct thread *td, struct linux_creat_args *args)
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{
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char *path;
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int error;
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if (!LUSECONVPATH(td)) {
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return (kern_openat(td, AT_FDCWD, args->path, UIO_USERSPACE,
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O_WRONLY | O_CREAT | O_TRUNC, args->mode));
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}
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LCONVPATHEXIST(args->path, &path);
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error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
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O_WRONLY | O_CREAT | O_TRUNC, args->mode);
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LFREEPATH(path);
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return (error);
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}
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#endif
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static int
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linux_common_openflags(int l_flags)
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{
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int bsd_flags;
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bsd_flags = 0;
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switch (l_flags & LINUX_O_ACCMODE) {
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case LINUX_O_WRONLY:
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bsd_flags |= O_WRONLY;
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break;
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case LINUX_O_RDWR:
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bsd_flags |= O_RDWR;
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break;
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default:
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bsd_flags |= O_RDONLY;
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}
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if (l_flags & LINUX_O_NDELAY)
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bsd_flags |= O_NONBLOCK;
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if (l_flags & LINUX_O_APPEND)
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bsd_flags |= O_APPEND;
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if (l_flags & LINUX_O_SYNC)
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bsd_flags |= O_FSYNC;
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if (l_flags & LINUX_O_CLOEXEC)
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bsd_flags |= O_CLOEXEC;
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if (l_flags & LINUX_O_NONBLOCK)
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bsd_flags |= O_NONBLOCK;
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if (l_flags & LINUX_O_ASYNC)
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bsd_flags |= O_ASYNC;
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if (l_flags & LINUX_O_CREAT)
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bsd_flags |= O_CREAT;
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if (l_flags & LINUX_O_TRUNC)
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bsd_flags |= O_TRUNC;
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if (l_flags & LINUX_O_EXCL)
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bsd_flags |= O_EXCL;
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if (l_flags & LINUX_O_NOCTTY)
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bsd_flags |= O_NOCTTY;
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if (l_flags & LINUX_O_DIRECT)
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bsd_flags |= O_DIRECT;
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if (l_flags & LINUX_O_NOFOLLOW)
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bsd_flags |= O_NOFOLLOW;
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if (l_flags & LINUX_O_DIRECTORY)
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bsd_flags |= O_DIRECTORY;
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if (l_flags & LINUX_O_PATH)
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bsd_flags |= O_PATH;
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/* XXX LINUX_O_NOATIME: unable to be easily implemented. */
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return (bsd_flags);
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}
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static int
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linux_common_open(struct thread *td, int dirfd, const char *path, int l_flags,
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int mode, enum uio_seg seg)
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{
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struct proc *p = td->td_proc;
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struct file *fp;
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int fd;
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int bsd_flags, error;
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bsd_flags = linux_common_openflags(l_flags);
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error = kern_openat(td, dirfd, path, seg, bsd_flags, mode);
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if (error != 0) {
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if (error == EMLINK)
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error = ELOOP;
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goto done;
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}
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if (p->p_flag & P_CONTROLT)
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goto done;
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if (bsd_flags & O_NOCTTY)
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goto done;
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/*
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* XXX In between kern_openat() and fget(), another process
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* having the same filedesc could use that fd without
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* checking below.
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*/
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fd = td->td_retval[0];
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if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) {
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if (fp->f_type != DTYPE_VNODE) {
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fdrop(fp, td);
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goto done;
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}
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sx_slock(&proctree_lock);
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PROC_LOCK(p);
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if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
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PROC_UNLOCK(p);
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sx_sunlock(&proctree_lock);
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/* XXXPJD: Verify if TIOCSCTTY is allowed. */
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(void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
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td->td_ucred, td);
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} else {
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PROC_UNLOCK(p);
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sx_sunlock(&proctree_lock);
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}
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fdrop(fp, td);
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}
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done:
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return (error);
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}
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int
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linux_openat(struct thread *td, struct linux_openat_args *args)
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{
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char *path;
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int dfd, error;
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dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
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if (!LUSECONVPATH(td)) {
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return (linux_common_open(td, dfd, args->filename, args->flags,
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args->mode, UIO_USERSPACE));
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}
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if (args->flags & LINUX_O_CREAT)
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LCONVPATH_AT(args->filename, &path, 1, dfd);
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else
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LCONVPATH_AT(args->filename, &path, 0, dfd);
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error = linux_common_open(td, dfd, path, args->flags, args->mode,
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UIO_SYSSPACE);
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LFREEPATH(path);
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return (error);
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}
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#ifdef LINUX_LEGACY_SYSCALLS
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int
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linux_open(struct thread *td, struct linux_open_args *args)
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{
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char *path;
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int error;
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if (!LUSECONVPATH(td)) {
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return (linux_common_open(td, AT_FDCWD, args->path, args->flags,
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args->mode, UIO_USERSPACE));
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}
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if (args->flags & LINUX_O_CREAT)
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LCONVPATHCREAT(args->path, &path);
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else
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LCONVPATHEXIST(args->path, &path);
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error = linux_common_open(td, AT_FDCWD, path, args->flags, args->mode,
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UIO_SYSSPACE);
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LFREEPATH(path);
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return (error);
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}
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#endif
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int
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linux_name_to_handle_at(struct thread *td,
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struct linux_name_to_handle_at_args *args)
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{
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static const l_int valid_flags = (LINUX_AT_SYMLINK_FOLLOW |
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LINUX_AT_EMPTY_PATH);
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static const l_uint fh_size = sizeof(fhandle_t);
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|
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fhandle_t fh;
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l_uint fh_bytes;
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l_int mount_id;
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int error, fd, bsd_flags;
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|
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if (args->flags & ~valid_flags)
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return (EINVAL);
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|
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fd = args->dirfd;
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if (fd == LINUX_AT_FDCWD)
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fd = AT_FDCWD;
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bsd_flags = 0;
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if (!(args->flags & LINUX_AT_SYMLINK_FOLLOW))
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bsd_flags |= AT_SYMLINK_NOFOLLOW;
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if ((args->flags & LINUX_AT_EMPTY_PATH) != 0)
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bsd_flags |= AT_EMPTY_PATH;
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|
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if (!LUSECONVPATH(td)) {
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error = kern_getfhat(td, bsd_flags, fd, args->name,
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UIO_USERSPACE, &fh, UIO_SYSSPACE);
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} else {
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char *path;
|
|
|
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LCONVPATH_AT(args->name, &path, 0, fd);
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error = kern_getfhat(td, bsd_flags, fd, path, UIO_SYSSPACE,
|
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&fh, UIO_SYSSPACE);
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LFREEPATH(path);
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}
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/* Emit mount_id -- required before EOVERFLOW case. */
|
|
mount_id = (fh.fh_fsid.val[0] ^ fh.fh_fsid.val[1]);
|
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error = copyout(&mount_id, args->mnt_id, sizeof(mount_id));
|
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if (error != 0)
|
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return (error);
|
|
|
|
/* Check if there is room for handle. */
|
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error = copyin(&args->handle->handle_bytes, &fh_bytes,
|
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sizeof(fh_bytes));
|
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if (error != 0)
|
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return (error);
|
|
|
|
if (fh_bytes < fh_size) {
|
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error = copyout(&fh_size, &args->handle->handle_bytes,
|
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sizeof(fh_size));
|
|
if (error == 0)
|
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error = EOVERFLOW;
|
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return (error);
|
|
}
|
|
|
|
/* Emit handle. */
|
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mount_id = 0;
|
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/*
|
|
* We don't use handle_type for anything yet, but initialize a known
|
|
* value.
|
|
*/
|
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error = copyout(&mount_id, &args->handle->handle_type,
|
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sizeof(mount_id));
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = copyout(&fh, &args->handle->f_handle,
|
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sizeof(fh));
|
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return (error);
|
|
}
|
|
|
|
int
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linux_open_by_handle_at(struct thread *td,
|
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struct linux_open_by_handle_at_args *args)
|
|
{
|
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l_uint fh_bytes;
|
|
int bsd_flags, error;
|
|
|
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error = copyin(&args->handle->handle_bytes, &fh_bytes,
|
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sizeof(fh_bytes));
|
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if (error != 0)
|
|
return (error);
|
|
|
|
if (fh_bytes < sizeof(fhandle_t))
|
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return (EINVAL);
|
|
|
|
bsd_flags = linux_common_openflags(args->flags);
|
|
return (kern_fhopen(td, (void *)&args->handle->f_handle, bsd_flags));
|
|
}
|
|
|
|
int
|
|
linux_lseek(struct thread *td, struct linux_lseek_args *args)
|
|
{
|
|
|
|
return (kern_lseek(td, args->fdes, args->off, args->whence));
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_llseek(struct thread *td, struct linux_llseek_args *args)
|
|
{
|
|
int error;
|
|
off_t off;
|
|
|
|
off = (args->olow) | (((off_t) args->ohigh) << 32);
|
|
|
|
error = kern_lseek(td, args->fd, off, args->whence);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = copyout(td->td_retval, args->res, sizeof(off_t));
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
td->td_retval[0] = 0;
|
|
return (0);
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
/*
|
|
* Note that linux_getdents(2) and linux_getdents64(2) have the same
|
|
* arguments. They only differ in the definition of struct dirent they
|
|
* operate on.
|
|
* Note that linux_readdir(2) is a special case of linux_getdents(2)
|
|
* where count is always equals 1, meaning that the buffer is one
|
|
* dirent-structure in size and that the code can't handle more anyway.
|
|
* Note that linux_readdir(2) can't be implemented by means of linux_getdents(2)
|
|
* as in case when the *dent buffer size is equal to 1 linux_getdents(2) will
|
|
* trash user stack.
|
|
*/
|
|
|
|
static int
|
|
linux_getdents_error(struct thread *td, int fd, int err)
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
/* Linux return ENOTDIR in case when fd is not a directory. */
|
|
error = getvnode(td, fd, &cap_read_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
vp = fp->f_vnode;
|
|
if (vp->v_type != VDIR) {
|
|
fdrop(fp, td);
|
|
return (ENOTDIR);
|
|
}
|
|
fdrop(fp, td);
|
|
return (err);
|
|
}
|
|
|
|
struct l_dirent {
|
|
l_ulong d_ino;
|
|
l_off_t d_off;
|
|
l_ushort d_reclen;
|
|
char d_name[LINUX_NAME_MAX + 1];
|
|
};
|
|
|
|
struct l_dirent64 {
|
|
uint64_t d_ino;
|
|
int64_t d_off;
|
|
l_ushort d_reclen;
|
|
u_char d_type;
|
|
char d_name[LINUX_NAME_MAX + 1];
|
|
};
|
|
|
|
/*
|
|
* Linux uses the last byte in the dirent buffer to store d_type,
|
|
* at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
|
|
*/
|
|
#define LINUX_RECLEN(namlen) \
|
|
roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong))
|
|
|
|
#define LINUX_RECLEN64(namlen) \
|
|
roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \
|
|
sizeof(uint64_t))
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_getdents(struct thread *td, struct linux_getdents_args *args)
|
|
{
|
|
struct dirent *bdp;
|
|
caddr_t inp, buf; /* BSD-format */
|
|
int len, reclen; /* BSD-format */
|
|
caddr_t outp; /* Linux-format */
|
|
int resid, linuxreclen; /* Linux-format */
|
|
caddr_t lbuf; /* Linux-format */
|
|
off_t base;
|
|
struct l_dirent *linux_dirent;
|
|
int buflen, error;
|
|
size_t retval;
|
|
|
|
buflen = min(args->count, MAXBSIZE);
|
|
buf = malloc(buflen, M_TEMP, M_WAITOK);
|
|
|
|
error = kern_getdirentries(td, args->fd, buf, buflen,
|
|
&base, NULL, UIO_SYSSPACE);
|
|
if (error != 0) {
|
|
error = linux_getdents_error(td, args->fd, error);
|
|
goto out1;
|
|
}
|
|
|
|
lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
|
|
|
|
len = td->td_retval[0];
|
|
inp = buf;
|
|
outp = (caddr_t)args->dent;
|
|
resid = args->count;
|
|
retval = 0;
|
|
|
|
while (len > 0) {
|
|
bdp = (struct dirent *) inp;
|
|
reclen = bdp->d_reclen;
|
|
linuxreclen = LINUX_RECLEN(bdp->d_namlen);
|
|
/*
|
|
* No more space in the user supplied dirent buffer.
|
|
* Return EINVAL.
|
|
*/
|
|
if (resid < linuxreclen) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
linux_dirent = (struct l_dirent*)lbuf;
|
|
linux_dirent->d_ino = bdp->d_fileno;
|
|
linux_dirent->d_off = bdp->d_off;
|
|
linux_dirent->d_reclen = linuxreclen;
|
|
/*
|
|
* Copy d_type to last byte of l_dirent buffer
|
|
*/
|
|
lbuf[linuxreclen - 1] = bdp->d_type;
|
|
strlcpy(linux_dirent->d_name, bdp->d_name,
|
|
linuxreclen - offsetof(struct l_dirent, d_name)-1);
|
|
error = copyout(linux_dirent, outp, linuxreclen);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
inp += reclen;
|
|
base += reclen;
|
|
len -= reclen;
|
|
|
|
retval += linuxreclen;
|
|
outp += linuxreclen;
|
|
resid -= linuxreclen;
|
|
}
|
|
td->td_retval[0] = retval;
|
|
|
|
out:
|
|
free(lbuf, M_TEMP);
|
|
out1:
|
|
free(buf, M_TEMP);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
|
|
{
|
|
struct dirent *bdp;
|
|
caddr_t inp, buf; /* BSD-format */
|
|
int len, reclen; /* BSD-format */
|
|
caddr_t outp; /* Linux-format */
|
|
int resid, linuxreclen; /* Linux-format */
|
|
caddr_t lbuf; /* Linux-format */
|
|
off_t base;
|
|
struct l_dirent64 *linux_dirent64;
|
|
int buflen, error;
|
|
size_t retval;
|
|
|
|
buflen = min(args->count, MAXBSIZE);
|
|
buf = malloc(buflen, M_TEMP, M_WAITOK);
|
|
|
|
error = kern_getdirentries(td, args->fd, buf, buflen,
|
|
&base, NULL, UIO_SYSSPACE);
|
|
if (error != 0) {
|
|
error = linux_getdents_error(td, args->fd, error);
|
|
goto out1;
|
|
}
|
|
|
|
lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
|
|
|
|
len = td->td_retval[0];
|
|
inp = buf;
|
|
outp = (caddr_t)args->dirent;
|
|
resid = args->count;
|
|
retval = 0;
|
|
|
|
while (len > 0) {
|
|
bdp = (struct dirent *) inp;
|
|
reclen = bdp->d_reclen;
|
|
linuxreclen = LINUX_RECLEN64(bdp->d_namlen);
|
|
/*
|
|
* No more space in the user supplied dirent buffer.
|
|
* Return EINVAL.
|
|
*/
|
|
if (resid < linuxreclen) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
linux_dirent64 = (struct l_dirent64*)lbuf;
|
|
linux_dirent64->d_ino = bdp->d_fileno;
|
|
linux_dirent64->d_off = bdp->d_off;
|
|
linux_dirent64->d_reclen = linuxreclen;
|
|
linux_dirent64->d_type = bdp->d_type;
|
|
strlcpy(linux_dirent64->d_name, bdp->d_name,
|
|
linuxreclen - offsetof(struct l_dirent64, d_name));
|
|
error = copyout(linux_dirent64, outp, linuxreclen);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
inp += reclen;
|
|
base += reclen;
|
|
len -= reclen;
|
|
|
|
retval += linuxreclen;
|
|
outp += linuxreclen;
|
|
resid -= linuxreclen;
|
|
}
|
|
td->td_retval[0] = retval;
|
|
|
|
out:
|
|
free(lbuf, M_TEMP);
|
|
out1:
|
|
free(buf, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_readdir(struct thread *td, struct linux_readdir_args *args)
|
|
{
|
|
struct dirent *bdp;
|
|
caddr_t buf; /* BSD-format */
|
|
int linuxreclen; /* Linux-format */
|
|
caddr_t lbuf; /* Linux-format */
|
|
off_t base;
|
|
struct l_dirent *linux_dirent;
|
|
int buflen, error;
|
|
|
|
buflen = LINUX_RECLEN(LINUX_NAME_MAX);
|
|
buf = malloc(buflen, M_TEMP, M_WAITOK);
|
|
|
|
error = kern_getdirentries(td, args->fd, buf, buflen,
|
|
&base, NULL, UIO_SYSSPACE);
|
|
if (error != 0) {
|
|
error = linux_getdents_error(td, args->fd, error);
|
|
goto out;
|
|
}
|
|
if (td->td_retval[0] == 0)
|
|
goto out;
|
|
|
|
lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
|
|
|
|
bdp = (struct dirent *) buf;
|
|
linuxreclen = LINUX_RECLEN(bdp->d_namlen);
|
|
|
|
linux_dirent = (struct l_dirent*)lbuf;
|
|
linux_dirent->d_ino = bdp->d_fileno;
|
|
linux_dirent->d_off = bdp->d_off;
|
|
linux_dirent->d_reclen = bdp->d_namlen;
|
|
strlcpy(linux_dirent->d_name, bdp->d_name,
|
|
linuxreclen - offsetof(struct l_dirent, d_name));
|
|
error = copyout(linux_dirent, args->dent, linuxreclen);
|
|
if (error == 0)
|
|
td->td_retval[0] = linuxreclen;
|
|
|
|
free(lbuf, M_TEMP);
|
|
out:
|
|
free(buf, M_TEMP);
|
|
return (error);
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
/*
|
|
* These exist mainly for hooks for doing /compat/linux translation.
|
|
*/
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_access(struct thread *td, struct linux_access_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
/* Linux convention. */
|
|
if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
|
|
return (EINVAL);
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
error = kern_accessat(td, AT_FDCWD, args->path, UIO_USERSPACE, 0,
|
|
args->amode);
|
|
} else {
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0,
|
|
args->amode);
|
|
LFREEPATH(path);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
linux_do_accessat(struct thread *td, int ldfd, const char *filename,
|
|
int amode, int flags)
|
|
{
|
|
char *path;
|
|
int error, dfd;
|
|
|
|
/* Linux convention. */
|
|
if (amode & ~(F_OK | X_OK | W_OK | R_OK))
|
|
return (EINVAL);
|
|
|
|
dfd = (ldfd == LINUX_AT_FDCWD) ? AT_FDCWD : ldfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
error = kern_accessat(td, dfd, filename, UIO_USERSPACE, flags, amode);
|
|
} else {
|
|
LCONVPATHEXIST_AT(filename, &path, dfd);
|
|
error = kern_accessat(td, dfd, path, UIO_SYSSPACE, flags, amode);
|
|
LFREEPATH(path);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
|
|
{
|
|
|
|
return (linux_do_accessat(td, args->dfd, args->filename, args->amode,
|
|
0));
|
|
}
|
|
|
|
int
|
|
linux_faccessat2(struct thread *td, struct linux_faccessat2_args *args)
|
|
{
|
|
int flags, unsupported;
|
|
|
|
/* XXX. AT_SYMLINK_NOFOLLOW is not supported by kern_accessat */
|
|
unsupported = args->flags & ~(LINUX_AT_EACCESS | LINUX_AT_EMPTY_PATH);
|
|
if (unsupported != 0) {
|
|
linux_msg(td, "faccessat2 unsupported flag 0x%x", unsupported);
|
|
return (EINVAL);
|
|
}
|
|
|
|
flags = (args->flags & LINUX_AT_EACCESS) == 0 ? 0 :
|
|
AT_EACCESS;
|
|
flags |= (args->flags & LINUX_AT_EMPTY_PATH) == 0 ? 0 :
|
|
AT_EMPTY_PATH;
|
|
return (linux_do_accessat(td, args->dfd, args->filename, args->amode,
|
|
flags));
|
|
}
|
|
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_unlink(struct thread *td, struct linux_unlink_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
struct stat st;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
error = kern_funlinkat(td, AT_FDCWD, args->path, FD_NONE,
|
|
UIO_USERSPACE, 0, 0);
|
|
if (error == EPERM) {
|
|
/* Introduce POSIX noncompliant behaviour of Linux */
|
|
if (kern_statat(td, 0, AT_FDCWD, args->path,
|
|
UIO_USERSPACE, &st) == 0) {
|
|
if (S_ISDIR(st.st_mode))
|
|
error = EISDIR;
|
|
}
|
|
}
|
|
} else {
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_funlinkat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0, 0);
|
|
if (error == EPERM) {
|
|
/* Introduce POSIX noncompliant behaviour of Linux */
|
|
if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE,
|
|
&st) == 0) {
|
|
if (S_ISDIR(st.st_mode))
|
|
error = EISDIR;
|
|
}
|
|
}
|
|
LFREEPATH(path);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
linux_unlinkat_impl(struct thread *td, enum uio_seg pathseg, const char *path,
|
|
int dfd, struct linux_unlinkat_args *args)
|
|
{
|
|
struct stat st;
|
|
int error;
|
|
|
|
if (args->flag & LINUX_AT_REMOVEDIR)
|
|
error = kern_frmdirat(td, dfd, path, FD_NONE, pathseg, 0);
|
|
else
|
|
error = kern_funlinkat(td, dfd, path, FD_NONE, pathseg, 0, 0);
|
|
if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
|
|
/* Introduce POSIX noncompliant behaviour of Linux */
|
|
if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
|
|
pathseg, &st) == 0 && S_ISDIR(st.st_mode))
|
|
error = EISDIR;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
|
|
{
|
|
char *path;
|
|
int error, dfd;
|
|
|
|
if (args->flag & ~LINUX_AT_REMOVEDIR)
|
|
return (EINVAL);
|
|
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (linux_unlinkat_impl(td, UIO_USERSPACE, args->pathname,
|
|
dfd, args));
|
|
}
|
|
LCONVPATHEXIST_AT(args->pathname, &path, dfd);
|
|
error = linux_unlinkat_impl(td, UIO_SYSSPACE, path, dfd, args);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
int
|
|
linux_chdir(struct thread *td, struct linux_chdir_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_chdir(td, args->path, UIO_USERSPACE));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_chdir(td, path, UIO_SYSSPACE);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_chmod(struct thread *td, struct linux_chmod_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_fchmodat(td, AT_FDCWD, args->path, UIO_USERSPACE,
|
|
args->mode, 0));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode, 0);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
|
|
{
|
|
char *path;
|
|
int error, dfd;
|
|
|
|
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_fchmodat(td, dfd, args->filename, UIO_USERSPACE,
|
|
args->mode, 0));
|
|
}
|
|
LCONVPATHEXIST_AT(args->filename, &path, dfd);
|
|
error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_mkdirat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->mode));
|
|
}
|
|
LCONVPATHCREAT(args->path, &path);
|
|
error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
|
|
{
|
|
char *path;
|
|
int error, dfd;
|
|
|
|
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_mkdirat(td, dfd, args->pathname, UIO_USERSPACE, args->mode));
|
|
}
|
|
LCONVPATHCREAT_AT(args->pathname, &path, dfd);
|
|
error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_frmdirat(td, AT_FDCWD, args->path, FD_NONE,
|
|
UIO_USERSPACE, 0));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_frmdirat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_rename(struct thread *td, struct linux_rename_args *args)
|
|
{
|
|
char *from, *to;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_renameat(td, AT_FDCWD, args->from, AT_FDCWD,
|
|
args->to, UIO_USERSPACE));
|
|
}
|
|
LCONVPATHEXIST(args->from, &from);
|
|
/* Expand LCONVPATHCREATE so that `from' can be freed on errors */
|
|
error = linux_emul_convpath(args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
|
|
if (to == NULL) {
|
|
LFREEPATH(from);
|
|
return (error);
|
|
}
|
|
error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
|
|
LFREEPATH(from);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_renameat(struct thread *td, struct linux_renameat_args *args)
|
|
{
|
|
struct linux_renameat2_args renameat2_args = {
|
|
.olddfd = args->olddfd,
|
|
.oldname = args->oldname,
|
|
.newdfd = args->newdfd,
|
|
.newname = args->newname,
|
|
.flags = 0
|
|
};
|
|
|
|
return (linux_renameat2(td, &renameat2_args));
|
|
}
|
|
|
|
int
|
|
linux_renameat2(struct thread *td, struct linux_renameat2_args *args)
|
|
{
|
|
char *from, *to;
|
|
int error, olddfd, newdfd;
|
|
|
|
if (args->flags != 0) {
|
|
if (args->flags & ~(LINUX_RENAME_EXCHANGE |
|
|
LINUX_RENAME_NOREPLACE | LINUX_RENAME_WHITEOUT))
|
|
return (EINVAL);
|
|
if (args->flags & LINUX_RENAME_EXCHANGE &&
|
|
args->flags & (LINUX_RENAME_NOREPLACE |
|
|
LINUX_RENAME_WHITEOUT))
|
|
return (EINVAL);
|
|
#if 0
|
|
/*
|
|
* This spams the console on Ubuntu Focal.
|
|
*
|
|
* What's needed here is a general mechanism to let users know
|
|
* about missing features without hogging the system.
|
|
*/
|
|
linux_msg(td, "renameat2 unsupported flags 0x%x",
|
|
args->flags);
|
|
#endif
|
|
return (EINVAL);
|
|
}
|
|
|
|
olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
|
|
newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_renameat(td, olddfd, args->oldname, newdfd,
|
|
args->newname, UIO_USERSPACE));
|
|
}
|
|
LCONVPATHEXIST_AT(args->oldname, &from, olddfd);
|
|
/* Expand LCONVPATHCREATE so that `from' can be freed on errors */
|
|
error = linux_emul_convpath(args->newname, UIO_USERSPACE, &to, 1, newdfd);
|
|
if (to == NULL) {
|
|
LFREEPATH(from);
|
|
return (error);
|
|
}
|
|
error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
|
|
LFREEPATH(from);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_symlink(struct thread *td, struct linux_symlink_args *args)
|
|
{
|
|
char *path, *to;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_symlinkat(td, args->path, AT_FDCWD, args->to,
|
|
UIO_USERSPACE));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
|
|
error = linux_emul_convpath(args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
|
|
if (to == NULL) {
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE);
|
|
LFREEPATH(path);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
|
|
{
|
|
char *path, *to;
|
|
int error, dfd;
|
|
|
|
dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_symlinkat(td, args->oldname, dfd, args->newname,
|
|
UIO_USERSPACE));
|
|
}
|
|
LCONVPATHEXIST(args->oldname, &path);
|
|
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
|
|
error = linux_emul_convpath(args->newname, UIO_USERSPACE, &to, 1, dfd);
|
|
if (to == NULL) {
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
|
|
LFREEPATH(path);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_readlink(struct thread *td, struct linux_readlink_args *args)
|
|
{
|
|
char *name;
|
|
int error;
|
|
|
|
if (args->count <= 0)
|
|
return (EINVAL);
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE,
|
|
args->buf, UIO_USERSPACE, args->count));
|
|
}
|
|
LCONVPATHEXIST(args->name, &name);
|
|
error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE,
|
|
args->buf, UIO_USERSPACE, args->count);
|
|
LFREEPATH(name);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
|
|
{
|
|
char *name;
|
|
int error, dfd;
|
|
|
|
if (args->bufsiz <= 0)
|
|
return (EINVAL);
|
|
|
|
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_readlinkat(td, dfd, args->path, UIO_USERSPACE,
|
|
args->buf, UIO_USERSPACE, args->bufsiz));
|
|
}
|
|
LCONVPATHEXIST_AT(args->path, &name, dfd);
|
|
error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
|
|
UIO_USERSPACE, args->bufsiz);
|
|
LFREEPATH(name);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_truncate(struct thread *td, struct linux_truncate_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_truncate(td, args->path, UIO_USERSPACE, args->length));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
|
|
{
|
|
char *path;
|
|
off_t length;
|
|
int error;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
length = PAIR32TO64(off_t, args->length);
|
|
#else
|
|
length = args->length;
|
|
#endif
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_truncate(td, args->path, UIO_USERSPACE, length));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_truncate(td, path, UIO_SYSSPACE, length);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
int
|
|
linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
|
|
{
|
|
|
|
return (kern_ftruncate(td, args->fd, args->length));
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
|
|
{
|
|
off_t length;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
length = PAIR32TO64(off_t, args->length);
|
|
#else
|
|
length = args->length;
|
|
#endif
|
|
|
|
return (kern_ftruncate(td, args->fd, length));
|
|
}
|
|
#endif
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_link(struct thread *td, struct linux_link_args *args)
|
|
{
|
|
char *path, *to;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_linkat(td, AT_FDCWD, AT_FDCWD, args->path, args->to,
|
|
UIO_USERSPACE, AT_SYMLINK_FOLLOW));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
|
|
error = linux_emul_convpath(args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
|
|
if (to == NULL) {
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE,
|
|
AT_SYMLINK_FOLLOW);
|
|
LFREEPATH(path);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_linkat(struct thread *td, struct linux_linkat_args *args)
|
|
{
|
|
char *path, *to;
|
|
int error, olddfd, newdfd, flag;
|
|
|
|
if (args->flag & ~(LINUX_AT_SYMLINK_FOLLOW | LINUX_AT_EMPTY_PATH))
|
|
return (EINVAL);
|
|
|
|
flag = (args->flag & LINUX_AT_SYMLINK_FOLLOW) != 0 ? AT_SYMLINK_FOLLOW :
|
|
0;
|
|
flag |= (args->flag & LINUX_AT_EMPTY_PATH) != 0 ? AT_EMPTY_PATH : 0;
|
|
|
|
olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
|
|
newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_linkat(td, olddfd, newdfd, args->oldname,
|
|
args->newname, UIO_USERSPACE, flag));
|
|
}
|
|
LCONVPATHEXIST_AT(args->oldname, &path, olddfd);
|
|
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
|
|
error = linux_emul_convpath(args->newname, UIO_USERSPACE, &to, 1, newdfd);
|
|
if (to == NULL) {
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, flag);
|
|
LFREEPATH(path);
|
|
LFREEPATH(to);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap)
|
|
{
|
|
|
|
return (kern_fsync(td, uap->fd, false));
|
|
}
|
|
|
|
int
|
|
linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap)
|
|
{
|
|
off_t nbytes, offset;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
nbytes = PAIR32TO64(off_t, uap->nbytes);
|
|
offset = PAIR32TO64(off_t, uap->offset);
|
|
#else
|
|
nbytes = uap->nbytes;
|
|
offset = uap->offset;
|
|
#endif
|
|
|
|
if (offset < 0 || nbytes < 0 ||
|
|
(uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE |
|
|
LINUX_SYNC_FILE_RANGE_WRITE |
|
|
LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (kern_fsync(td, uap->fd, false));
|
|
}
|
|
|
|
int
|
|
linux_pread(struct thread *td, struct linux_pread_args *uap)
|
|
{
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
int error;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
offset = PAIR32TO64(off_t, uap->offset);
|
|
#else
|
|
offset = uap->offset;
|
|
#endif
|
|
|
|
error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, offset);
|
|
if (error == 0) {
|
|
/* This seems to violate POSIX but Linux does it. */
|
|
error = fgetvp(td, uap->fd, &cap_pread_rights, &vp);
|
|
if (error != 0)
|
|
return (error);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
vrele(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_pwrite(struct thread *td, struct linux_pwrite_args *uap)
|
|
{
|
|
off_t offset;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
offset = PAIR32TO64(off_t, uap->offset);
|
|
#else
|
|
offset = uap->offset;
|
|
#endif
|
|
|
|
return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, offset));
|
|
}
|
|
|
|
#define HALF_LONG_BITS ((sizeof(l_long) * NBBY / 2))
|
|
|
|
static inline off_t
|
|
pos_from_hilo(unsigned long high, unsigned long low)
|
|
{
|
|
|
|
return (((off_t)high << HALF_LONG_BITS) << HALF_LONG_BITS) | low;
|
|
}
|
|
|
|
int
|
|
linux_preadv(struct thread *td, struct linux_preadv_args *uap)
|
|
{
|
|
struct uio *auio;
|
|
int error;
|
|
off_t offset;
|
|
|
|
/*
|
|
* According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES
|
|
* pos_l and pos_h, respectively, contain the
|
|
* low order and high order 32 bits of offset.
|
|
*/
|
|
offset = pos_from_hilo(uap->pos_h, uap->pos_l);
|
|
if (offset < 0)
|
|
return (EINVAL);
|
|
#ifdef COMPAT_LINUX32
|
|
error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
|
|
#else
|
|
error = copyinuio(uap->vec, uap->vlen, &auio);
|
|
#endif
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_preadv(td, uap->fd, auio, offset);
|
|
free(auio, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_pwritev(struct thread *td, struct linux_pwritev_args *uap)
|
|
{
|
|
struct uio *auio;
|
|
int error;
|
|
off_t offset;
|
|
|
|
/*
|
|
* According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES
|
|
* pos_l and pos_h, respectively, contain the
|
|
* low order and high order 32 bits of offset.
|
|
*/
|
|
offset = pos_from_hilo(uap->pos_h, uap->pos_l);
|
|
if (offset < 0)
|
|
return (EINVAL);
|
|
#ifdef COMPAT_LINUX32
|
|
error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
|
|
#else
|
|
error = copyinuio(uap->vec, uap->vlen, &auio);
|
|
#endif
|
|
if (error != 0)
|
|
return (error);
|
|
error = kern_pwritev(td, uap->fd, auio, offset);
|
|
free(auio, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_mount(struct thread *td, struct linux_mount_args *args)
|
|
{
|
|
struct mntarg *ma = NULL;
|
|
char *fstypename, *mntonname, *mntfromname, *data;
|
|
int error, fsflags;
|
|
|
|
fstypename = malloc(MNAMELEN, M_TEMP, M_WAITOK);
|
|
mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
|
|
mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
|
|
data = NULL;
|
|
error = copyinstr(args->filesystemtype, fstypename, MNAMELEN - 1,
|
|
NULL);
|
|
if (error != 0)
|
|
goto out;
|
|
if (args->specialfile != NULL) {
|
|
error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
|
|
if (error != 0)
|
|
goto out;
|
|
} else {
|
|
mntfromname[0] = '\0';
|
|
}
|
|
error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
if (strcmp(fstypename, "ext2") == 0) {
|
|
strcpy(fstypename, "ext2fs");
|
|
} else if (strcmp(fstypename, "proc") == 0) {
|
|
strcpy(fstypename, "linprocfs");
|
|
} else if (strcmp(fstypename, "vfat") == 0) {
|
|
strcpy(fstypename, "msdosfs");
|
|
} else if (strcmp(fstypename, "fuse") == 0 ||
|
|
strncmp(fstypename, "fuse.", 5) == 0) {
|
|
char *fuse_options, *fuse_option, *fuse_name;
|
|
|
|
strcpy(mntfromname, "/dev/fuse");
|
|
strcpy(fstypename, "fusefs");
|
|
data = malloc(MNAMELEN, M_TEMP, M_WAITOK);
|
|
error = copyinstr(args->data, data, MNAMELEN - 1, NULL);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
fuse_options = data;
|
|
while ((fuse_option = strsep(&fuse_options, ",")) != NULL) {
|
|
fuse_name = strsep(&fuse_option, "=");
|
|
if (fuse_name == NULL || fuse_option == NULL)
|
|
goto out;
|
|
ma = mount_arg(ma, fuse_name, fuse_option, -1);
|
|
}
|
|
|
|
/*
|
|
* The FUSE server uses Linux errno values instead of FreeBSD
|
|
* ones; add a flag to tell fuse(4) to do errno translation.
|
|
*/
|
|
ma = mount_arg(ma, "linux_errnos", "1", -1);
|
|
}
|
|
|
|
fsflags = 0;
|
|
|
|
/*
|
|
* Linux SYNC flag is not included; the closest equivalent
|
|
* FreeBSD has is !ASYNC, which is our default.
|
|
*/
|
|
if (args->rwflag & LINUX_MS_RDONLY)
|
|
fsflags |= MNT_RDONLY;
|
|
if (args->rwflag & LINUX_MS_NOSUID)
|
|
fsflags |= MNT_NOSUID;
|
|
if (args->rwflag & LINUX_MS_NOEXEC)
|
|
fsflags |= MNT_NOEXEC;
|
|
if (args->rwflag & LINUX_MS_REMOUNT)
|
|
fsflags |= MNT_UPDATE;
|
|
|
|
ma = mount_arg(ma, "fstype", fstypename, -1);
|
|
ma = mount_arg(ma, "fspath", mntonname, -1);
|
|
ma = mount_arg(ma, "from", mntfromname, -1);
|
|
error = kernel_mount(ma, fsflags);
|
|
out:
|
|
free(fstypename, M_TEMP);
|
|
free(mntonname, M_TEMP);
|
|
free(mntfromname, M_TEMP);
|
|
free(data, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
|
|
{
|
|
|
|
return (kern_unmount(td, args->path, 0));
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_umount(struct thread *td, struct linux_umount_args *args)
|
|
{
|
|
int flags;
|
|
|
|
flags = 0;
|
|
if ((args->flags & LINUX_MNT_FORCE) != 0) {
|
|
args->flags &= ~LINUX_MNT_FORCE;
|
|
flags |= MNT_FORCE;
|
|
}
|
|
if (args->flags != 0) {
|
|
linux_msg(td, "unsupported umount2 flags %#x", args->flags);
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (kern_unmount(td, args->path, flags));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* fcntl family of syscalls
|
|
*/
|
|
|
|
struct l_flock {
|
|
l_short l_type;
|
|
l_short l_whence;
|
|
l_off_t l_start;
|
|
l_off_t l_len;
|
|
l_pid_t l_pid;
|
|
}
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
__packed
|
|
#endif
|
|
;
|
|
|
|
static void
|
|
linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
|
|
{
|
|
switch (linux_flock->l_type) {
|
|
case LINUX_F_RDLCK:
|
|
bsd_flock->l_type = F_RDLCK;
|
|
break;
|
|
case LINUX_F_WRLCK:
|
|
bsd_flock->l_type = F_WRLCK;
|
|
break;
|
|
case LINUX_F_UNLCK:
|
|
bsd_flock->l_type = F_UNLCK;
|
|
break;
|
|
default:
|
|
bsd_flock->l_type = -1;
|
|
break;
|
|
}
|
|
bsd_flock->l_whence = linux_flock->l_whence;
|
|
bsd_flock->l_start = (off_t)linux_flock->l_start;
|
|
bsd_flock->l_len = (off_t)linux_flock->l_len;
|
|
bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
|
|
bsd_flock->l_sysid = 0;
|
|
}
|
|
|
|
static void
|
|
bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
|
|
{
|
|
switch (bsd_flock->l_type) {
|
|
case F_RDLCK:
|
|
linux_flock->l_type = LINUX_F_RDLCK;
|
|
break;
|
|
case F_WRLCK:
|
|
linux_flock->l_type = LINUX_F_WRLCK;
|
|
break;
|
|
case F_UNLCK:
|
|
linux_flock->l_type = LINUX_F_UNLCK;
|
|
break;
|
|
}
|
|
linux_flock->l_whence = bsd_flock->l_whence;
|
|
linux_flock->l_start = (l_off_t)bsd_flock->l_start;
|
|
linux_flock->l_len = (l_off_t)bsd_flock->l_len;
|
|
linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
struct l_flock64 {
|
|
l_short l_type;
|
|
l_short l_whence;
|
|
l_loff_t l_start;
|
|
l_loff_t l_len;
|
|
l_pid_t l_pid;
|
|
}
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
__packed
|
|
#endif
|
|
;
|
|
|
|
static void
|
|
linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
|
|
{
|
|
switch (linux_flock->l_type) {
|
|
case LINUX_F_RDLCK:
|
|
bsd_flock->l_type = F_RDLCK;
|
|
break;
|
|
case LINUX_F_WRLCK:
|
|
bsd_flock->l_type = F_WRLCK;
|
|
break;
|
|
case LINUX_F_UNLCK:
|
|
bsd_flock->l_type = F_UNLCK;
|
|
break;
|
|
default:
|
|
bsd_flock->l_type = -1;
|
|
break;
|
|
}
|
|
bsd_flock->l_whence = linux_flock->l_whence;
|
|
bsd_flock->l_start = (off_t)linux_flock->l_start;
|
|
bsd_flock->l_len = (off_t)linux_flock->l_len;
|
|
bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
|
|
bsd_flock->l_sysid = 0;
|
|
}
|
|
|
|
static void
|
|
bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
|
|
{
|
|
switch (bsd_flock->l_type) {
|
|
case F_RDLCK:
|
|
linux_flock->l_type = LINUX_F_RDLCK;
|
|
break;
|
|
case F_WRLCK:
|
|
linux_flock->l_type = LINUX_F_WRLCK;
|
|
break;
|
|
case F_UNLCK:
|
|
linux_flock->l_type = LINUX_F_UNLCK;
|
|
break;
|
|
}
|
|
linux_flock->l_whence = bsd_flock->l_whence;
|
|
linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
|
|
linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
|
|
linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
static int
|
|
fcntl_common(struct thread *td, struct linux_fcntl_args *args)
|
|
{
|
|
struct l_flock linux_flock;
|
|
struct flock bsd_flock;
|
|
struct pipe *fpipe;
|
|
struct file *fp;
|
|
long arg;
|
|
int error, result;
|
|
|
|
switch (args->cmd) {
|
|
case LINUX_F_DUPFD:
|
|
return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
|
|
|
|
case LINUX_F_GETFD:
|
|
return (kern_fcntl(td, args->fd, F_GETFD, 0));
|
|
|
|
case LINUX_F_SETFD:
|
|
return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
|
|
|
|
case LINUX_F_GETFL:
|
|
error = kern_fcntl(td, args->fd, F_GETFL, 0);
|
|
result = td->td_retval[0];
|
|
td->td_retval[0] = 0;
|
|
if (result & O_RDONLY)
|
|
td->td_retval[0] |= LINUX_O_RDONLY;
|
|
if (result & O_WRONLY)
|
|
td->td_retval[0] |= LINUX_O_WRONLY;
|
|
if (result & O_RDWR)
|
|
td->td_retval[0] |= LINUX_O_RDWR;
|
|
if (result & O_NDELAY)
|
|
td->td_retval[0] |= LINUX_O_NONBLOCK;
|
|
if (result & O_APPEND)
|
|
td->td_retval[0] |= LINUX_O_APPEND;
|
|
if (result & O_FSYNC)
|
|
td->td_retval[0] |= LINUX_O_SYNC;
|
|
if (result & O_ASYNC)
|
|
td->td_retval[0] |= LINUX_O_ASYNC;
|
|
#ifdef LINUX_O_NOFOLLOW
|
|
if (result & O_NOFOLLOW)
|
|
td->td_retval[0] |= LINUX_O_NOFOLLOW;
|
|
#endif
|
|
#ifdef LINUX_O_DIRECT
|
|
if (result & O_DIRECT)
|
|
td->td_retval[0] |= LINUX_O_DIRECT;
|
|
#endif
|
|
return (error);
|
|
|
|
case LINUX_F_SETFL:
|
|
arg = 0;
|
|
if (args->arg & LINUX_O_NDELAY)
|
|
arg |= O_NONBLOCK;
|
|
if (args->arg & LINUX_O_APPEND)
|
|
arg |= O_APPEND;
|
|
if (args->arg & LINUX_O_SYNC)
|
|
arg |= O_FSYNC;
|
|
if (args->arg & LINUX_O_ASYNC)
|
|
arg |= O_ASYNC;
|
|
#ifdef LINUX_O_NOFOLLOW
|
|
if (args->arg & LINUX_O_NOFOLLOW)
|
|
arg |= O_NOFOLLOW;
|
|
#endif
|
|
#ifdef LINUX_O_DIRECT
|
|
if (args->arg & LINUX_O_DIRECT)
|
|
arg |= O_DIRECT;
|
|
#endif
|
|
return (kern_fcntl(td, args->fd, F_SETFL, arg));
|
|
|
|
case LINUX_F_GETLK:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock(&linux_flock, &bsd_flock);
|
|
error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
|
|
if (error)
|
|
return (error);
|
|
bsd_to_linux_flock(&bsd_flock, &linux_flock);
|
|
return (copyout(&linux_flock, (void *)args->arg,
|
|
sizeof(linux_flock)));
|
|
|
|
case LINUX_F_SETLK:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock(&linux_flock, &bsd_flock);
|
|
return (kern_fcntl(td, args->fd, F_SETLK,
|
|
(intptr_t)&bsd_flock));
|
|
|
|
case LINUX_F_SETLKW:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock(&linux_flock, &bsd_flock);
|
|
return (kern_fcntl(td, args->fd, F_SETLKW,
|
|
(intptr_t)&bsd_flock));
|
|
|
|
case LINUX_F_GETOWN:
|
|
return (kern_fcntl(td, args->fd, F_GETOWN, 0));
|
|
|
|
case LINUX_F_SETOWN:
|
|
/*
|
|
* XXX some Linux applications depend on F_SETOWN having no
|
|
* significant effect for pipes (SIGIO is not delivered for
|
|
* pipes under Linux-2.2.35 at least).
|
|
*/
|
|
error = fget(td, args->fd,
|
|
&cap_fcntl_rights, &fp);
|
|
if (error)
|
|
return (error);
|
|
if (fp->f_type == DTYPE_PIPE) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
fdrop(fp, td);
|
|
|
|
return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
|
|
|
|
case LINUX_F_DUPFD_CLOEXEC:
|
|
return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
|
|
/*
|
|
* Our F_SEAL_* values match Linux one for maximum compatibility. So we
|
|
* only needed to account for different values for fcntl(2) commands.
|
|
*/
|
|
case LINUX_F_GET_SEALS:
|
|
error = kern_fcntl(td, args->fd, F_GET_SEALS, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
td->td_retval[0] = bsd_to_linux_bits(td->td_retval[0],
|
|
seal_bitmap, 0);
|
|
return (0);
|
|
|
|
case LINUX_F_ADD_SEALS:
|
|
return (kern_fcntl(td, args->fd, F_ADD_SEALS,
|
|
linux_to_bsd_bits(args->arg, seal_bitmap, 0)));
|
|
|
|
case LINUX_F_GETPIPE_SZ:
|
|
error = fget(td, args->fd,
|
|
&cap_fcntl_rights, &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if (fp->f_type != DTYPE_PIPE) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
fpipe = fp->f_data;
|
|
td->td_retval[0] = fpipe->pipe_buffer.size;
|
|
fdrop(fp, td);
|
|
return (0);
|
|
|
|
default:
|
|
linux_msg(td, "unsupported fcntl cmd %d", args->cmd);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
int
|
|
linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
|
|
{
|
|
|
|
return (fcntl_common(td, args));
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
|
|
{
|
|
struct l_flock64 linux_flock;
|
|
struct flock bsd_flock;
|
|
struct linux_fcntl_args fcntl_args;
|
|
int error;
|
|
|
|
switch (args->cmd) {
|
|
case LINUX_F_GETLK64:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock64(&linux_flock, &bsd_flock);
|
|
error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
|
|
if (error)
|
|
return (error);
|
|
bsd_to_linux_flock64(&bsd_flock, &linux_flock);
|
|
return (copyout(&linux_flock, (void *)args->arg,
|
|
sizeof(linux_flock)));
|
|
|
|
case LINUX_F_SETLK64:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock64(&linux_flock, &bsd_flock);
|
|
return (kern_fcntl(td, args->fd, F_SETLK,
|
|
(intptr_t)&bsd_flock));
|
|
|
|
case LINUX_F_SETLKW64:
|
|
error = copyin((void *)args->arg, &linux_flock,
|
|
sizeof(linux_flock));
|
|
if (error)
|
|
return (error);
|
|
linux_to_bsd_flock64(&linux_flock, &bsd_flock);
|
|
return (kern_fcntl(td, args->fd, F_SETLKW,
|
|
(intptr_t)&bsd_flock));
|
|
}
|
|
|
|
fcntl_args.fd = args->fd;
|
|
fcntl_args.cmd = args->cmd;
|
|
fcntl_args.arg = args->arg;
|
|
return (fcntl_common(td, &fcntl_args));
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_chown(struct thread *td, struct linux_chown_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE,
|
|
args->uid, args->gid, 0));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
|
|
args->gid, 0);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
|
|
{
|
|
char *path;
|
|
int error, dfd, flag, unsupported;
|
|
|
|
unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH);
|
|
if (unsupported != 0) {
|
|
linux_msg(td, "fchownat unsupported flag 0x%x", unsupported);
|
|
return (EINVAL);
|
|
}
|
|
|
|
flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
|
|
AT_SYMLINK_NOFOLLOW;
|
|
flag |= (args->flag & LINUX_AT_EMPTY_PATH) == 0 ? 0 :
|
|
AT_EMPTY_PATH;
|
|
|
|
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_fchownat(td, dfd, args->filename, UIO_USERSPACE,
|
|
args->uid, args->gid, flag));
|
|
}
|
|
LCONVPATHEXIST_AT(args->filename, &path, dfd);
|
|
error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
|
|
flag);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_lchown(struct thread *td, struct linux_lchown_args *args)
|
|
{
|
|
char *path;
|
|
int error;
|
|
|
|
if (!LUSECONVPATH(td)) {
|
|
return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->uid,
|
|
args->gid, AT_SYMLINK_NOFOLLOW));
|
|
}
|
|
LCONVPATHEXIST(args->path, &path);
|
|
error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, args->gid,
|
|
AT_SYMLINK_NOFOLLOW);
|
|
LFREEPATH(path);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
convert_fadvice(int advice)
|
|
{
|
|
switch (advice) {
|
|
case LINUX_POSIX_FADV_NORMAL:
|
|
return (POSIX_FADV_NORMAL);
|
|
case LINUX_POSIX_FADV_RANDOM:
|
|
return (POSIX_FADV_RANDOM);
|
|
case LINUX_POSIX_FADV_SEQUENTIAL:
|
|
return (POSIX_FADV_SEQUENTIAL);
|
|
case LINUX_POSIX_FADV_WILLNEED:
|
|
return (POSIX_FADV_WILLNEED);
|
|
case LINUX_POSIX_FADV_DONTNEED:
|
|
return (POSIX_FADV_DONTNEED);
|
|
case LINUX_POSIX_FADV_NOREUSE:
|
|
return (POSIX_FADV_NOREUSE);
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
int
|
|
linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
|
|
{
|
|
off_t offset;
|
|
int advice;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
offset = PAIR32TO64(off_t, args->offset);
|
|
#else
|
|
offset = args->offset;
|
|
#endif
|
|
|
|
advice = convert_fadvice(args->advice);
|
|
if (advice == -1)
|
|
return (EINVAL);
|
|
return (kern_posix_fadvise(td, args->fd, offset, args->len, advice));
|
|
}
|
|
|
|
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
|
|
int
|
|
linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
|
|
{
|
|
off_t len, offset;
|
|
int advice;
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
len = PAIR32TO64(off_t, args->len);
|
|
offset = PAIR32TO64(off_t, args->offset);
|
|
#else
|
|
len = args->len;
|
|
offset = args->offset;
|
|
#endif
|
|
|
|
advice = convert_fadvice(args->advice);
|
|
if (advice == -1)
|
|
return (EINVAL);
|
|
return (kern_posix_fadvise(td, args->fd, offset, len, advice));
|
|
}
|
|
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
|
|
|
|
#ifdef LINUX_LEGACY_SYSCALLS
|
|
int
|
|
linux_pipe(struct thread *td, struct linux_pipe_args *args)
|
|
{
|
|
int fildes[2];
|
|
int error;
|
|
|
|
error = kern_pipe(td, fildes, 0, NULL, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = copyout(fildes, args->pipefds, sizeof(fildes));
|
|
if (error != 0) {
|
|
(void)kern_close(td, fildes[0]);
|
|
(void)kern_close(td, fildes[1]);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
|
|
{
|
|
int fildes[2];
|
|
int error, flags;
|
|
|
|
if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
|
|
return (EINVAL);
|
|
|
|
flags = 0;
|
|
if ((args->flags & LINUX_O_NONBLOCK) != 0)
|
|
flags |= O_NONBLOCK;
|
|
if ((args->flags & LINUX_O_CLOEXEC) != 0)
|
|
flags |= O_CLOEXEC;
|
|
error = kern_pipe(td, fildes, flags, NULL, NULL);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
error = copyout(fildes, args->pipefds, sizeof(fildes));
|
|
if (error != 0) {
|
|
(void)kern_close(td, fildes[0]);
|
|
(void)kern_close(td, fildes[1]);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_dup3(struct thread *td, struct linux_dup3_args *args)
|
|
{
|
|
int cmd;
|
|
intptr_t newfd;
|
|
|
|
if (args->oldfd == args->newfd)
|
|
return (EINVAL);
|
|
if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
|
|
return (EINVAL);
|
|
if (args->flags & LINUX_O_CLOEXEC)
|
|
cmd = F_DUP2FD_CLOEXEC;
|
|
else
|
|
cmd = F_DUP2FD;
|
|
|
|
newfd = args->newfd;
|
|
return (kern_fcntl(td, args->oldfd, cmd, newfd));
|
|
}
|
|
|
|
int
|
|
linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
|
|
{
|
|
off_t len, offset;
|
|
|
|
/*
|
|
* We emulate only posix_fallocate system call for which
|
|
* mode should be 0.
|
|
*/
|
|
if (args->mode != 0)
|
|
return (EOPNOTSUPP);
|
|
|
|
#if defined(__amd64__) && defined(COMPAT_LINUX32)
|
|
len = PAIR32TO64(off_t, args->len);
|
|
offset = PAIR32TO64(off_t, args->offset);
|
|
#else
|
|
len = args->len;
|
|
offset = args->offset;
|
|
#endif
|
|
|
|
return (kern_posix_fallocate(td, args->fd, offset, len));
|
|
}
|
|
|
|
int
|
|
linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args
|
|
*args)
|
|
{
|
|
l_loff_t inoff, outoff, *inoffp, *outoffp;
|
|
int error, flags;
|
|
|
|
/*
|
|
* copy_file_range(2) on Linux doesn't define any flags (yet), so is
|
|
* the native implementation. Enforce it.
|
|
*/
|
|
if (args->flags != 0) {
|
|
linux_msg(td, "copy_file_range unsupported flags 0x%x",
|
|
args->flags);
|
|
return (EINVAL);
|
|
}
|
|
flags = 0;
|
|
inoffp = outoffp = NULL;
|
|
if (args->off_in != NULL) {
|
|
error = copyin(args->off_in, &inoff, sizeof(l_loff_t));
|
|
if (error != 0)
|
|
return (error);
|
|
inoffp = &inoff;
|
|
}
|
|
if (args->off_out != NULL) {
|
|
error = copyin(args->off_out, &outoff, sizeof(l_loff_t));
|
|
if (error != 0)
|
|
return (error);
|
|
outoffp = &outoff;
|
|
}
|
|
|
|
error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out,
|
|
outoffp, args->len, flags);
|
|
if (error == 0 && args->off_in != NULL)
|
|
error = copyout(inoffp, args->off_in, sizeof(l_loff_t));
|
|
if (error == 0 && args->off_out != NULL)
|
|
error = copyout(outoffp, args->off_out, sizeof(l_loff_t));
|
|
return (error);
|
|
}
|
|
|
|
#define LINUX_MEMFD_PREFIX "memfd:"
|
|
|
|
int
|
|
linux_memfd_create(struct thread *td, struct linux_memfd_create_args *args)
|
|
{
|
|
char memfd_name[LINUX_NAME_MAX + 1];
|
|
int error, flags, shmflags, oflags;
|
|
|
|
/*
|
|
* This is our clever trick to avoid the heap allocation to copy in the
|
|
* uname. We don't really need to go this far out of our way, but it
|
|
* does keep the rest of this function fairly clean as they don't have
|
|
* to worry about cleanup on the way out.
|
|
*/
|
|
error = copyinstr(args->uname_ptr,
|
|
memfd_name + sizeof(LINUX_MEMFD_PREFIX) - 1,
|
|
LINUX_NAME_MAX - sizeof(LINUX_MEMFD_PREFIX) - 1, NULL);
|
|
if (error != 0) {
|
|
if (error == ENAMETOOLONG)
|
|
error = EINVAL;
|
|
return (error);
|
|
}
|
|
|
|
memcpy(memfd_name, LINUX_MEMFD_PREFIX, sizeof(LINUX_MEMFD_PREFIX) - 1);
|
|
flags = linux_to_bsd_bits(args->flags, mfd_bitmap, 0);
|
|
if ((flags & ~(MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_HUGETLB |
|
|
MFD_HUGE_MASK)) != 0)
|
|
return (EINVAL);
|
|
/* Size specified but no HUGETLB. */
|
|
if ((flags & MFD_HUGE_MASK) != 0 && (flags & MFD_HUGETLB) == 0)
|
|
return (EINVAL);
|
|
/* We don't actually support HUGETLB. */
|
|
if ((flags & MFD_HUGETLB) != 0)
|
|
return (ENOSYS);
|
|
oflags = O_RDWR;
|
|
shmflags = SHM_GROW_ON_WRITE;
|
|
if ((flags & MFD_CLOEXEC) != 0)
|
|
oflags |= O_CLOEXEC;
|
|
if ((flags & MFD_ALLOW_SEALING) != 0)
|
|
shmflags |= SHM_ALLOW_SEALING;
|
|
return (kern_shm_open2(td, SHM_ANON, oflags, 0, shmflags, NULL,
|
|
memfd_name));
|
|
}
|
|
|
|
int
|
|
linux_splice(struct thread *td, struct linux_splice_args *args)
|
|
{
|
|
|
|
linux_msg(td, "syscall splice not really implemented");
|
|
|
|
/*
|
|
* splice(2) is documented to return EINVAL in various circumstances;
|
|
* returning it instead of ENOSYS should hint the caller to use fallback
|
|
* instead.
|
|
*/
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
linux_close_range(struct thread *td, struct linux_close_range_args *args)
|
|
{
|
|
u_int flags = 0;
|
|
|
|
/*
|
|
* Implementing close_range(CLOSE_RANGE_UNSHARE) allows Linux to
|
|
* unshare filedesc table of the calling thread from others threads
|
|
* in a thread group (i.e., process in the FreeBSD) or others processes,
|
|
* which shares the same table, before closing the files. FreeBSD does
|
|
* not have compatible unsharing mechanism due to the fact that sharing
|
|
* process resources, including filedesc table, is at thread level in the
|
|
* Linux, while in the FreeBSD it is at the process level.
|
|
* Return EINVAL for now if the CLOSE_RANGE_UNSHARE flag is specified
|
|
* until this new Linux API stabilizes.
|
|
*/
|
|
|
|
if ((args->flags & ~(LINUX_CLOSE_RANGE_CLOEXEC)) != 0)
|
|
return (EINVAL);
|
|
if (args->first > args->last)
|
|
return (EINVAL);
|
|
if ((args->flags & LINUX_CLOSE_RANGE_CLOEXEC) != 0)
|
|
flags |= CLOSE_RANGE_CLOEXEC;
|
|
return (kern_close_range(td, flags, args->first, args->last));
|
|
}
|