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Forward compatibility for ino64.

Browse source 
Add forward compatibility so that new binaries can run on old
kernels. If the new system call from ino64 isn't available on your
system, then the old one will be used and the results translated.  The
stat and statfs families of functions are fully emulated. While not
required by policy, in this case it is helpful to our users to provide
this compatibility. In this case, it allows rollback of the kernel
after installing a new userland should a problem be discovered. It
also prevents foot-shooting if a user does an install before rebooting
with the new kernel. Finally, it allows the use case where one needs
to run new binaries on an old kernel as part of an upgrade process.

The getdirentries family uses tricks that may not work on remote
filesystems. Specifically, it uses a buffer 1/4 the size requested to
get the data from he old syscall.

The code carefully uses direct syscalls for old system calls to avoid
referencing freebsd11_* symbols, which contaminate ld-elf.so.1's
export table due to its use of stat functions, which causes errno to
be incorrect in client programs due to the wrong *stat* function being
resolved in some cases.

This code should removed sometime after 12 is branched.

Tested on: 12-current binaries on a 10.3-beta kernel run and return
       consistent results. 12-current kernel and userland with
       packages from before ino64 was committed also work.

Differential Revision: https://reviews.freebsd.org/D11185
Reviewed by: kib@, emaste@
This commit is contained in:
Warner Losh 2017-06-23 18:06:20 +00:00
parent e978052623
commit 5ab191c42b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=320278
13 changed files with 541 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
UPDATING
View file

@ -55,6 +55,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
Switch back to the BSDL dtc (Device Tree Compiler). Set WITH_GPL_DTC
if you require the GPL compiler.
20170619:
Forward compatibility for the "ino64" project have been committed. This
will allow most new binaries to run on older kernels in a limited
fashion. This prevents many of the common foot-shooting actions in the
upgrade as well as the limited ability to roll back the kernel across
the ino64 upgrade. Complicated use cases may not work properly, though
enough simpler ones work to allow recovery in most situations.
20170618:
The internal ABI used for communication between the NFS kernel modules
was changed by r320085, so __FreeBSD_version was bumped to

7
lib/libc/include/libc_private.h
View file

@ -311,6 +311,7 @@ struct rusage;
struct sigaction;
struct sockaddr;
struct stat;
struct statfs;
struct timespec;
struct timeval;
struct timezone;
@ -327,13 +328,16 @@ int __sys_clock_nanosleep(__clockid_t, int,
const struct timespec *, struct timespec *);
int __sys_close(int);
int __sys_connect(int, const struct sockaddr *, __socklen_t);
__ssize_t __sys_getdirentries(int, char *, __size_t, __off_t *);
int __sys_fcntl(int, int, ...);
int __sys_fdatasync(int);
int __sys_fstat(int fd, struct stat *);
int __sys_fstatfs(int fd, struct statfs *);
int __sys_fstatat(int, const char *, struct stat *, int);
int __sys_fsync(int);
__pid_t __sys_fork(void);
int __sys_ftruncate(int, __off_t);
__ssize_t __sys_getdirentries(int, char *, __size_t, __off_t *);
int __sys_getfsstat(struct statfs *, long, int);
int __sys_gettimeofday(struct timeval *, struct timezone *);
int __sys_kevent(int, const struct kevent *, int, struct kevent *,
int, const struct timespec *);
@ -372,6 +376,7 @@ int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
const struct timespec *);
int __sys_sigwait(const __sigset_t *, int *);
int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
int __sys_statfs(const char *, struct statfs *);
int __sys_swapcontext(struct __ucontext *,
const struct __ucontext *);
int __sys_thr_kill(long, int);

8
lib/libc/sys/Makefile.inc
View file

@ -37,6 +37,14 @@ SRCS+= \
SRCS+= getdents.c lstat.c mknod.c stat.c
SRCS+= fstat.c fstatat.c fstatfs.c getfsstat.c statfs.c
NOASM+= fstat.o fstatat.o fstatfs.o getfsstat.o statfs.o
PSEUDO+= _fstat.o _fstatat.o _fstatfs.o _getfsstat.o _statfs.o
SRCS+= getdirentries.c
NOASM+= getdirentries.o
PSEUDO+= _getdirentries.o
SRCS+= pipe.c
INTERPOSED = \

102
lib/libc/sys/compat-ino64.h Normal file
View file

@ -0,0 +1,102 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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.
*
* $FreeBSD$
*/
/*
* Forward compatibility shim to convert old stat buffer to
* new so we can call the old system call, but return data in
* the new system call's format.
*/
#define _WANT_FREEBSD11_STATFS
#include <sys/fcntl.h>
#include <sys/mount.h>
#define _WANT_FREEBSD11_STAT
#include <sys/stat.h>
#include <string.h>
#define INO64_FIRST 1200031
static __inline void
__stat11_to_stat(const struct freebsd11_stat *sb11, struct stat *sb)
{
sb->st_dev = sb11->st_dev;
sb->st_ino = sb11->st_ino;
sb->st_nlink = sb11->st_nlink;
sb->st_mode = sb11->st_mode;
sb->st_uid = sb11->st_uid;
sb->st_gid = sb11->st_gid;
sb->st_rdev = sb11->st_rdev;
sb->st_atim = sb11->st_atim;
sb->st_mtim = sb11->st_mtim;
sb->st_ctim = sb11->st_ctim;
#ifdef __STAT_TIME_T_EXT
sb->st_atim_ext = 0;
sb->st_mtim_ext = 0;
sb->st_ctim_ext = 0;
sb->st_btim_ext = 0;
#endif
sb->st_birthtim = sb11->st_birthtim;
sb->st_size = sb11->st_size;
sb->st_blocks = sb11->st_blocks;
sb->st_blksize = sb11->st_blksize;
sb->st_flags = sb11->st_flags;
sb->st_gen = sb11->st_gen;
sb->st_padding0 = 0;
sb->st_padding1 = 0;
memset(sb->st_spare, 0, sizeof(sb->st_spare));
}
static __inline void
__statfs11_to_statfs(const struct freebsd11_statfs *sf11, struct statfs *sf)
{
sf->f_version = STATFS_VERSION;
sf->f_type = sf11->f_type;
sf->f_flags = sf11->f_flags;
sf->f_bsize = sf11->f_bsize;
sf->f_iosize = sf11->f_iosize;
sf->f_blocks = sf11->f_blocks;
sf->f_bfree = sf11->f_bfree;
sf->f_bavail = sf11->f_bavail;
sf->f_files = sf11->f_files;
sf->f_ffree = sf11->f_ffree;
sf->f_syncwrites = sf11->f_syncwrites;
sf->f_asyncwrites = sf11->f_asyncwrites;
sf->f_syncreads = sf11->f_syncreads;
sf->f_asyncreads = sf11->f_asyncreads;
sf->f_namemax = sf11->f_namemax;
sf->f_owner = sf11->f_owner;
sf->f_fsid = sf11->f_fsid;
memset(sf->f_spare, 0, sizeof(sf->f_spare));
memset(sf->f_charspare, 0, sizeof(sf->f_charspare));
strlcpy(sf->f_fstypename, sf11->f_fstypename, sizeof(sf->f_fstypename));
strlcpy(sf->f_mntfromname, sf11->f_mntfromname, sizeof(sf->f_mntfromname));
strlcpy(sf->f_mntonname, sf11->f_mntonname, sizeof(sf->f_mntonname));
}

54
lib/libc/sys/fstat.c Normal file
View file

@ -0,0 +1,54 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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 "namespace.h"
#include <sys/param.h>
#include <sys/syscall.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
#undef fstat
__weak_reference(_fstat, fstat);
#pragma weak _fstat
int
_fstat(int fd, struct stat *sb)
{
struct freebsd11_stat stat11;
int rv;
if (__getosreldate() >= INO64_FIRST)
return (__sys_fstat(fd, sb));
rv = syscall(SYS_freebsd11_fstat, fd, &stat11);
if (rv == 0)
__stat11_to_stat(&stat11, sb);
return (rv);
}

50
lib/libc/sys/fstatat.c Normal file
View file

@ -0,0 +1,50 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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 "namespace.h"
#include <sys/param.h>
#include <sys/syscall.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
int
fstatat(int fd, const char *path, struct stat *sb, int flag)
{
struct freebsd11_stat stat11;
int rv;
if (__getosreldate() >= INO64_FIRST)
return (__sys_fstatat(fd, path, sb, flag));
rv = syscall(SYS_freebsd11_fstatat, fd, path, &stat11, flag);
if (rv == 0)
__stat11_to_stat(&stat11, sb);
return (rv);
}

54
lib/libc/sys/fstatfs.c Normal file
View file

@ -0,0 +1,54 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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 "namespace.h"
#include <sys/param.h>
#include <sys/syscall.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
#undef fstatfs
__weak_reference(_fstatfs, fstatfs);
#pragma weak _fstatfs
int
_fstatfs(int fd, struct statfs *buf)
{
struct freebsd11_statfs statfs11;
int rv;
if (__getosreldate() >= INO64_FIRST)
return (__sys_fstatfs(fd, buf));
rv = syscall(SYS_freebsd11_fstatfs, fd, &statfs11);
if (rv == 0)
__statfs11_to_statfs(&statfs11, buf);
return (rv);
}

7
lib/libc/sys/getdents.c
View file

@ -36,6 +36,11 @@ __FBSDID("$FreeBSD$");
ssize_t
getdents(int fd, char *buf, size_t nbytes)
{
/*
* _getdirentries knows how to call the right thing and
* return it in the new format. It assumes that the entire
* libc expecting the new format.
*/
return (__sys_getdirentries(fd, buf, nbytes, NULL));
return (_getdirentries(fd, buf, nbytes, NULL));
}

117
lib/libc/sys/getdirentries.c Normal file
View file

@ -0,0 +1,117 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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("$FreeBSD$");
#define _WANT_FREEBSD11_DIRENT
#include "namespace.h"
#include <sys/param.h>
#include <sys/syscall.h>
#include "compat-ino64.h"
#include <dirent.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "libc_private.h"
static ssize_t
__cvt_dirents_from11(const char *de11, ssize_t len11, char *de, ssize_t len)
{
struct dirent *dst;
const struct freebsd11_dirent *src;
const char *edst, *esrc;
ssize_t rlen;
src = (const struct freebsd11_dirent *)de11;
dst = (struct dirent *)de;
esrc = de11 + len11;
edst = de + len;
while ((const char *)src < esrc && (const char *)dst < edst) {
rlen = roundup(offsetof(struct dirent, d_name) + src->d_namlen + 1, 8);
if ((const char *)dst + rlen >= edst)
break;
dst->d_fileno = src->d_fileno;
dst->d_off = 0; /* nothing uses it yet, so safe for now */
dst->d_reclen = rlen;
dst->d_type = src->d_type;
dst->d_pad0 = 0;
dst->d_namlen = src->d_namlen;
dst->d_pad1 = 0;
memset(dst->d_name, 0, roundup(src->d_namlen + 1, 8));
memcpy(dst->d_name, src->d_name, src->d_namlen);
dst = (struct dirent *)((char *)dst + rlen);
src = (const struct freebsd11_dirent *)((const char *)src + src->d_reclen);
}
return ((char *)dst - de);
}
#undef getdirentries
__weak_reference(_getdirentries, getdirentries);
#pragma weak _getdirentries
ssize_t
_getdirentries(int fd, char *buf, size_t nbytes, off_t *basep)
{
char *oldbuf;
size_t len;
ssize_t rv;
if (__getosreldate() >= INO64_FIRST)
return (__sys_getdirentries(fd, buf, nbytes, basep));
/*
* Because the old system call returns entries that are smaller than the
* new, we could wind up in a situation where we have too many to fit in
* the buffer with the new encoding. So sacrifice a small bit of
* efficiency to ensure that never happens. We pick 1/4 the size round
* up to the next DIRBLKSIZ. This will guarnatee enough room exists in
* the dst buffer due to changes in efficiency in packing dirent
* entries. We don't check against minimum block size to avoid a lot of
* stat calls, we'll see if that's wise or not.
* TBD: Will this difference matter to lseek?
*/
len = roundup(nbytes / 4, DIRBLKSIZ);
oldbuf = malloc(len);
if (oldbuf == NULL) {
errno = EINVAL; /* ENOMEM not in possible list */
return (-1);
}
rv = syscall(SYS_freebsd11_getdirentries, fd, oldbuf, len, basep);
if (rv == -1) {
free(oldbuf);
return (rv);
}
if (rv > 0)
rv = __cvt_dirents_from11(oldbuf, rv, buf, nbytes);
free(oldbuf);
return (rv);
}

64
lib/libc/sys/getfsstat.c Normal file
View file

@ -0,0 +1,64 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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 "namespace.h"
#include <sys/param.h>
#include "compat-ino64.h"
#include <sys/errno.h>
#include <sys/syscall.h>
#include <stdlib.h>
#include <unistd.h>
#include "libc_private.h"
int
getfsstat(struct statfs *buf, long bufsize, int flags)
{
struct freebsd11_statfs *statfs11 = NULL;
ssize_t len = 0;
int rv, i;
if (__getosreldate() >= INO64_FIRST)
return (__sys_getfsstat(buf, bufsize, flags));
if (buf != NULL) {
len = sizeof(struct freebsd11_statfs) * /* Round down on purpose to avoid */
(bufsize / sizeof(struct statfs)); /* overflow on translation. */
statfs11 = malloc(len);
if (statfs11 == NULL) {
errno = ENOMEM;
return (-1);
}
}
rv = syscall(SYS_freebsd11_getfsstat, statfs11, len, flags);
if (rv != -1 && buf != NULL) {
for (i = 0; i < rv; i++)
__statfs11_to_statfs(&statfs11[i], &buf[i]);
}
return (rv);
}

14
lib/libc/sys/lstat.c
View file

@ -1,4 +1,5 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* Copyright (c) 2012 Gleb Kurtsou <gleb@FreeBSD.org>
* All rights reserved.
*
@ -29,15 +30,22 @@ __FBSDID("$FreeBSD$");
#include "namespace.h"
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/syscall.h>
#include <sys/stat.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
int
lstat(const char *path, struct stat *sb)
{
struct freebsd11_stat stat11;
int rv;
return (__sys_fstatat(AT_FDCWD, path, sb, AT_SYMLINK_NOFOLLOW));
if (__getosreldate() >= INO64_FIRST)
return (__sys_fstatat(AT_FDCWD, path, sb, AT_SYMLINK_NOFOLLOW));
rv = syscall(SYS_freebsd11_lstat, path, &stat11);
if (rv == 0)
__stat11_to_stat(&stat11, sb);
return (rv);
}

14
lib/libc/sys/stat.c
View file

@ -1,4 +1,5 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* Copyright (c) 2012 Gleb Kurtsou <gleb@FreeBSD.org>
* All rights reserved.
*
@ -29,15 +30,22 @@ __FBSDID("$FreeBSD$");
#include "namespace.h"
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/syscall.h>
#include <sys/stat.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
int
stat(const char *path, struct stat *sb)
{
struct freebsd11_stat stat11;
int rv;
return (__sys_fstatat(AT_FDCWD, path, sb, 0));
if (__getosreldate() >= INO64_FIRST)
return (__sys_fstatat(AT_FDCWD, path, sb, 0));
rv = syscall(SYS_freebsd11_stat, path, &stat11);
if (rv == 0)
__stat11_to_stat(&stat11, sb);
return (rv);
}

50
lib/libc/sys/statfs.c Normal file
View file

@ -0,0 +1,50 @@
/*-
* Copyright (c) 2017 M. Warner Losh <imp@FreeBSD.org>
* 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 "namespace.h"
#include <sys/param.h>
#include <sys/syscall.h>
#include "compat-ino64.h"
#include <unistd.h>
#include "libc_private.h"
int
statfs(const char *path, struct statfs *buf)
{
struct freebsd11_statfs statfs11;
int rv;
if (__getosreldate() >= INO64_FIRST)
return (__sys_statfs(path, buf));
rv = syscall(SYS_freebsd11_statfs, path, &statfs11);
if (rv == 0)
__statfs11_to_statfs(&statfs11, buf);
return (rv);
}