diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index a1146c6a195a..a076c849aec8 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -1,2082 +1,2082 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1994-1995 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/capsicum.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/selinfo.h>
#include <sys/pipe.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/sx.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <sys/tty.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#ifdef COMPAT_LINUX32
#include <compat/freebsd32/freebsd32_misc.h>
#include <machine/../linux32/linux.h>
#include <machine/../linux32/linux32_proto.h>
#else
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#endif
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_util.h>
#include <compat/linux/linux_file.h>
static int linux_common_open(struct thread *, int, const char *, int, int,
enum uio_seg);
static int linux_do_accessat(struct thread *t, int, const char *, int, int);
static int linux_getdents_error(struct thread *, int, int);
static struct bsd_to_linux_bitmap seal_bitmap[] = {
BITMAP_1t1_LINUX(F_SEAL_SEAL),
BITMAP_1t1_LINUX(F_SEAL_SHRINK),
BITMAP_1t1_LINUX(F_SEAL_GROW),
BITMAP_1t1_LINUX(F_SEAL_WRITE),
};
#define MFD_HUGETLB_ENTRY(_size) \
{ \
.bsd_value = MFD_HUGE_##_size, \
.linux_value = LINUX_HUGETLB_FLAG_ENCODE_##_size \
}
static struct bsd_to_linux_bitmap mfd_bitmap[] = {
BITMAP_1t1_LINUX(MFD_CLOEXEC),
BITMAP_1t1_LINUX(MFD_ALLOW_SEALING),
BITMAP_1t1_LINUX(MFD_HUGETLB),
MFD_HUGETLB_ENTRY(64KB),
MFD_HUGETLB_ENTRY(512KB),
MFD_HUGETLB_ENTRY(1MB),
MFD_HUGETLB_ENTRY(2MB),
MFD_HUGETLB_ENTRY(8MB),
MFD_HUGETLB_ENTRY(16MB),
MFD_HUGETLB_ENTRY(32MB),
MFD_HUGETLB_ENTRY(256MB),
MFD_HUGETLB_ENTRY(512MB),
MFD_HUGETLB_ENTRY(1GB),
MFD_HUGETLB_ENTRY(2GB),
MFD_HUGETLB_ENTRY(16GB),
};
#undef MFD_HUGETLB_ENTRY
#ifdef LINUX_LEGACY_SYSCALLS
int
linux_creat(struct thread *td, struct linux_creat_args *args)
{
char *path;
int error;
if (!LUSECONVPATH(td)) {
return (kern_openat(td, AT_FDCWD, args->path, UIO_USERSPACE,
O_WRONLY | O_CREAT | O_TRUNC, args->mode));
}
LCONVPATHEXIST(td, args->path, &path);
error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
O_WRONLY | O_CREAT | O_TRUNC, args->mode);
LFREEPATH(path);
return (error);
}
#endif
static int
linux_common_openflags(int l_flags)
{
int bsd_flags;
bsd_flags = 0;
switch (l_flags & LINUX_O_ACCMODE) {
case LINUX_O_WRONLY:
bsd_flags |= O_WRONLY;
break;
case LINUX_O_RDWR:
bsd_flags |= O_RDWR;
break;
default:
bsd_flags |= O_RDONLY;
}
if (l_flags & LINUX_O_NDELAY)
bsd_flags |= O_NONBLOCK;
if (l_flags & LINUX_O_APPEND)
bsd_flags |= O_APPEND;
if (l_flags & LINUX_O_SYNC)
bsd_flags |= O_FSYNC;
if (l_flags & LINUX_O_CLOEXEC)
bsd_flags |= O_CLOEXEC;
if (l_flags & LINUX_O_NONBLOCK)
bsd_flags |= O_NONBLOCK;
if (l_flags & LINUX_O_ASYNC)
bsd_flags |= O_ASYNC;
if (l_flags & LINUX_O_CREAT)
bsd_flags |= O_CREAT;
if (l_flags & LINUX_O_TRUNC)
bsd_flags |= O_TRUNC;
if (l_flags & LINUX_O_EXCL)
bsd_flags |= O_EXCL;
if (l_flags & LINUX_O_NOCTTY)
bsd_flags |= O_NOCTTY;
if (l_flags & LINUX_O_DIRECT)
bsd_flags |= O_DIRECT;
if (l_flags & LINUX_O_NOFOLLOW)
bsd_flags |= O_NOFOLLOW;
if (l_flags & LINUX_O_DIRECTORY)
bsd_flags |= O_DIRECTORY;
if (l_flags & LINUX_O_PATH)
bsd_flags |= O_PATH;
/* XXX LINUX_O_NOATIME: unable to be easily implemented. */
return (bsd_flags);
}
static int
linux_common_open(struct thread *td, int dirfd, const char *path, int l_flags,
int mode, enum uio_seg seg)
{
struct proc *p = td->td_proc;
struct file *fp;
int fd;
int bsd_flags, error;
bsd_flags = linux_common_openflags(l_flags);
error = kern_openat(td, dirfd, path, seg, bsd_flags, mode);
if (error != 0) {
if (error == EMLINK)
error = ELOOP;
goto done;
}
if (p->p_flag & P_CONTROLT)
goto done;
if (bsd_flags & O_NOCTTY)
goto done;
/*
* XXX In between kern_openat() and fget(), another process
* having the same filedesc could use that fd without
* checking below.
*/
fd = td->td_retval[0];
if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) {
if (fp->f_type != DTYPE_VNODE) {
fdrop(fp, td);
goto done;
}
sx_slock(&proctree_lock);
PROC_LOCK(p);
if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
PROC_UNLOCK(p);
sx_sunlock(&proctree_lock);
/* XXXPJD: Verify if TIOCSCTTY is allowed. */
(void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
td->td_ucred, td);
} else {
PROC_UNLOCK(p);
sx_sunlock(&proctree_lock);
}
fdrop(fp, td);
}
done:
return (error);
}
int
linux_openat(struct thread *td, struct linux_openat_args *args)
{
char *path;
int dfd, error;
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
if (!LUSECONVPATH(td)) {
return (linux_common_open(td, dfd, args->filename, args->flags,
args->mode, UIO_USERSPACE));
}
if (args->flags & LINUX_O_CREAT)
LCONVPATH_AT(td, args->filename, &path, 1, dfd);
else
LCONVPATH_AT(td, args->filename, &path, 0, dfd);
error = linux_common_open(td, dfd, path, args->flags, args->mode,
UIO_SYSSPACE);
LFREEPATH(path);
return (error);
}
#ifdef LINUX_LEGACY_SYSCALLS
int
linux_open(struct thread *td, struct linux_open_args *args)
{
char *path;
int error;
if (!LUSECONVPATH(td)) {
return (linux_common_open(td, AT_FDCWD, args->path, args->flags,
args->mode, UIO_USERSPACE));
}
if (args->flags & LINUX_O_CREAT)
LCONVPATHCREAT(td, args->path, &path);
else
LCONVPATHEXIST(td, args->path, &path);
error = linux_common_open(td, AT_FDCWD, path, args->flags, args->mode,
UIO_SYSSPACE);
LFREEPATH(path);
return (error);
}
#endif
int
linux_name_to_handle_at(struct thread *td,
struct linux_name_to_handle_at_args *args)
{
static const l_int valid_flags = (LINUX_AT_SYMLINK_FOLLOW |
LINUX_AT_EMPTY_PATH);
static const l_uint fh_size = sizeof(fhandle_t);
fhandle_t fh;
l_uint fh_bytes;
l_int mount_id;
int error, fd, bsd_flags;
if (args->flags & ~valid_flags)
return (EINVAL);
if (args->flags & LINUX_AT_EMPTY_PATH)
/* XXX: not supported yet */
return (EOPNOTSUPP);
fd = args->dirfd;
if (fd == LINUX_AT_FDCWD)
fd = AT_FDCWD;
bsd_flags = 0;
if (!(args->flags & LINUX_AT_SYMLINK_FOLLOW))
bsd_flags |= AT_SYMLINK_NOFOLLOW;
if (!LUSECONVPATH(td)) {
error = kern_getfhat(td, bsd_flags, fd, args->name,
UIO_USERSPACE, &fh, UIO_SYSSPACE);
} else {
char *path;
LCONVPATH_AT(td, args->name, &path, 0, fd);
error = kern_getfhat(td, bsd_flags, fd, path, UIO_SYSSPACE,
&fh, UIO_SYSSPACE);
LFREEPATH(path);
}
if (error != 0)
return (error);
/* Emit mount_id -- required before EOVERFLOW case. */
mount_id = (fh.fh_fsid.val[0] ^ fh.fh_fsid.val[1]);
error = copyout(&mount_id, args->mnt_id, sizeof(mount_id));
if (error != 0)
return (error);
/* Check if there is room for handle. */
error = copyin(&args->handle->handle_bytes, &fh_bytes,
sizeof(fh_bytes));
if (error != 0)
return (error);
if (fh_bytes < fh_size) {
error = copyout(&fh_size, &args->handle->handle_bytes,
sizeof(fh_size));
if (error == 0)
error = EOVERFLOW;
return (error);
}
/* Emit handle. */
mount_id = 0;
/*
* We don't use handle_type for anything yet, but initialize a known
* value.
*/
error = copyout(&mount_id, &args->handle->handle_type,
sizeof(mount_id));
if (error != 0)
return (error);
error = copyout(&fh, &args->handle->f_handle,
sizeof(fh));
return (error);
}
int
linux_open_by_handle_at(struct thread *td,
struct linux_open_by_handle_at_args *args)
{
l_uint fh_bytes;
int bsd_flags, error;
error = copyin(&args->handle->handle_bytes, &fh_bytes,
sizeof(fh_bytes));
if (error != 0)
return (error);
if (fh_bytes < sizeof(fhandle_t))
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 = base + reclen;
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 = base + reclen;
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 = linuxreclen;
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(td, 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(td, 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_SYSSPACE, &st, NULL) == 0) {
if (S_ISDIR(st.st_mode))
error = EISDIR;
}
}
} else {
LCONVPATHEXIST(td, 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,
NULL) == 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,
UIO_SYSSPACE, &st, NULL) == 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(td, 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(td, 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(td, 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(td, 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(td, 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(td, 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(td, 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(td, args->from, &from);
/* Expand LCONVPATHCREATE so that `from' can be freed on errors */
error = linux_emul_convpath(td, 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(td, args->oldname, &from, olddfd);
/* Expand LCONVPATHCREATE so that `from' can be freed on errors */
error = linux_emul_convpath(td, 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(td, args->path, &path);
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
error = linux_emul_convpath(td, 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(td, args->oldname, &path);
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
error = linux_emul_convpath(td, 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 (!LUSECONVPATH(td)) {
return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE,
args->buf, UIO_USERSPACE, args->count));
}
LCONVPATHEXIST(td, 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;
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(td, 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(td, 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(td, 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(td, args->path, &path);
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
error = linux_emul_convpath(td, 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 :
+ flag = (args->flag & LINUX_AT_SYMLINK_FOLLOW) != 0 ? AT_SYMLINK_FOLLOW :
0;
- flag |= (args->flag & LINUX_AT_EMPTY_PATH) == 0 ? AT_EMPTY_PATH : 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(td, args->oldname, &path, olddfd);
/* Expand LCONVPATHCREATE so that `path' can be freed on errors */
error = linux_emul_convpath(td, 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));
}
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 = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
(sizeof(offset) * 4)) | 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 = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
(sizeof(offset) * 4)) | 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(td, 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(td, 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(td, 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);
}