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/*-
* 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
* in this position and unchanged.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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: release/9.1.0/sys/compat/linux/linux_stats.c 232405 2012-03-02 21:29:57Z ed $");
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/dirent.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/syscallsubr.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/vnode.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#ifdef COMPAT_LINUX32
#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_util.h>
#include <compat/linux/linux_file.h>
#define LINUX_SHMFS_MAGIC 0x01021994
static void
translate_vnhook_major_minor(struct vnode *vp, struct stat *sb)
{
int major, minor;
if (vp->v_type == VCHR && vp->v_rdev != NULL &&
linux_driver_get_major_minor(devtoname(vp->v_rdev),
&major, &minor) == 0) {
sb->st_rdev = (major << 8 | minor);
}
}
static int
linux_kern_statat(struct thread *td, int flag, int fd, char *path,
enum uio_seg pathseg, struct stat *sbp)
{
return (kern_statat_vnhook(td, flag, fd, path, pathseg, sbp,
translate_vnhook_major_minor));
}
static int
linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg,
struct stat *sbp)
{
return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp));
}
static int
linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg,
struct stat *sbp)
{
return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path,
pathseg, sbp));
}
/*
* XXX: This was removed from newstat_copyout(), and almost identical
* XXX: code was in stat64_copyout(). findcdev() needs to be replaced
* XXX: with something that does lookup and locking properly.
* XXX: When somebody fixes this: please try to avoid duplicating it.
*/
#if 0
static void
disk_foo(struct somestat *tbuf)
{
struct cdevsw *cdevsw;
struct cdev *dev;
/* Lie about disk drives which are character devices
* in FreeBSD but block devices under Linux.
*/
if (S_ISCHR(tbuf.st_mode) &&
(dev = findcdev(buf->st_rdev)) != NULL) {
cdevsw = dev_refthread(dev);
if (cdevsw != NULL) {
if (cdevsw->d_flags & D_DISK) {
tbuf.st_mode &= ~S_IFMT;
tbuf.st_mode |= S_IFBLK;
/* XXX this may not be quite right */
/* Map major number to 0 */
tbuf.st_dev = minor(buf->st_dev) & 0xf;
tbuf.st_rdev = buf->st_rdev & 0xff;
}
dev_relthread(dev);
}
}
}
#endif
static void
translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
{
struct file *fp;
struct vnode *vp;
int major, minor;
/*
* No capability rights required here.
*/
if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) ||
fget(td, fd, 0, &fp) != 0)
return;
vp = fp->f_vnode;
if (vp != NULL && vp->v_rdev != NULL &&
linux_driver_get_major_minor(devtoname(vp->v_rdev),
&major, &minor) == 0) {
buf->st_rdev = (major << 8 | minor);
} else if (fp->f_type == DTYPE_PTS) {
struct tty *tp = fp->f_data;
/* Convert the numbers for the slave device. */
if (linux_driver_get_major_minor(devtoname(tp->t_dev),
&major, &minor) == 0) {
buf->st_rdev = (major << 8 | minor);
}
}
fdrop(fp, td);
}
static int
newstat_copyout(struct stat *buf, void *ubuf)
{
struct l_newstat tbuf;
bzero(&tbuf, sizeof(tbuf));
tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
tbuf.st_ino = buf->st_ino;
tbuf.st_mode = buf->st_mode;
tbuf.st_nlink = buf->st_nlink;
tbuf.st_uid = buf->st_uid;
tbuf.st_gid = buf->st_gid;
tbuf.st_rdev = buf->st_rdev;
tbuf.st_size = buf->st_size;
tbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
tbuf.st_blksize = buf->st_blksize;
tbuf.st_blocks = buf->st_blocks;
return (copyout(&tbuf, ubuf, sizeof(tbuf)));
}
int
linux_newstat(struct thread *td, struct linux_newstat_args *args)
{
struct stat buf;
char *path;
int error;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(newstat))
printf(ARGS(newstat, "%s, *"), path);
#endif
error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
LFREEPATH(path);
if (error)
return (error);
return (newstat_copyout(&buf, args->buf));
}
int
linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
{
struct stat sb;
char *path;
int error;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(newlstat))
printf(ARGS(newlstat, "%s, *"), path);
#endif
error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb);
LFREEPATH(path);
if (error)
return (error);
return (newstat_copyout(&sb, args->buf));
}
int
linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
{
struct stat buf;
int error;
#ifdef DEBUG
if (ldebug(newfstat))
printf(ARGS(newfstat, "%d, *"), args->fd);
#endif
error = kern_fstat(td, args->fd, &buf);
translate_fd_major_minor(td, args->fd, &buf);
if (!error)
error = newstat_copyout(&buf, args->buf);
return (error);
}
static int
stat_copyout(struct stat *buf, void *ubuf)
{
struct l_stat lbuf;
bzero(&lbuf, sizeof(lbuf));
lbuf.st_dev = buf->st_dev;
lbuf.st_ino = buf->st_ino;
lbuf.st_mode = buf->st_mode;
lbuf.st_nlink = buf->st_nlink;
lbuf.st_uid = buf->st_uid;
lbuf.st_gid = buf->st_gid;
lbuf.st_rdev = buf->st_rdev;
if (buf->st_size < (quad_t)1 << 32)
lbuf.st_size = buf->st_size;
else
lbuf.st_size = -2;
lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
lbuf.st_blksize = buf->st_blksize;
lbuf.st_blocks = buf->st_blocks;
lbuf.st_flags = buf->st_flags;
lbuf.st_gen = buf->st_gen;
return (copyout(&lbuf, ubuf, sizeof(lbuf)));
}
int
linux_stat(struct thread *td, struct linux_stat_args *args)
{
struct stat buf;
char *path;
int error;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(stat))
printf(ARGS(stat, "%s, *"), path);
#endif
error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf);
if (error) {
LFREEPATH(path);
return (error);
}
LFREEPATH(path);
return(stat_copyout(&buf, args->up));
}
int
linux_lstat(struct thread *td, struct linux_lstat_args *args)
{
struct stat buf;
char *path;
int error;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(lstat))
printf(ARGS(lstat, "%s, *"), path);
#endif
error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf);
if (error) {
LFREEPATH(path);
return (error);
}
LFREEPATH(path);
return(stat_copyout(&buf, args->up));
}
/* XXX - All fields of type l_int are defined as l_long on i386 */
struct l_statfs {
l_int f_type;
l_int f_bsize;
l_int f_blocks;
l_int f_bfree;
l_int f_bavail;
l_int f_files;
l_int f_ffree;
l_fsid_t f_fsid;
l_int f_namelen;
l_int f_spare[6];
};
#define LINUX_CODA_SUPER_MAGIC 0x73757245L
#define LINUX_EXT2_SUPER_MAGIC 0xEF53L
#define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
#define LINUX_ISOFS_SUPER_MAGIC 0x9660L
#define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
#define LINUX_NCP_SUPER_MAGIC 0x564cL
#define LINUX_NFS_SUPER_MAGIC 0x6969L
#define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
#define LINUX_PROC_SUPER_MAGIC 0x9fa0L
#define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
#define LINUX_DEVFS_SUPER_MAGIC 0x1373L
static long
bsd_to_linux_ftype(const char *fstypename)
{
int i;
static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
{"ufs", LINUX_UFS_SUPER_MAGIC},
{"cd9660", LINUX_ISOFS_SUPER_MAGIC},
{"nfs", LINUX_NFS_SUPER_MAGIC},
{"ext2fs", LINUX_EXT2_SUPER_MAGIC},
{"procfs", LINUX_PROC_SUPER_MAGIC},
{"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
{"ntfs", LINUX_NTFS_SUPER_MAGIC},
{"nwfs", LINUX_NCP_SUPER_MAGIC},
{"hpfs", LINUX_HPFS_SUPER_MAGIC},
{"coda", LINUX_CODA_SUPER_MAGIC},
{"devfs", LINUX_DEVFS_SUPER_MAGIC},
{NULL, 0L}};
for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
return (b2l_tbl[i].linux_type);
return (0L);
}
static void
bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
{
linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
linux_statfs->f_bsize = bsd_statfs->f_bsize;
linux_statfs->f_blocks = bsd_statfs->f_blocks;
linux_statfs->f_bfree = bsd_statfs->f_bfree;
linux_statfs->f_bavail = bsd_statfs->f_bavail;
linux_statfs->f_ffree = bsd_statfs->f_ffree;
linux_statfs->f_files = bsd_statfs->f_files;
linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs->f_namelen = MAXNAMLEN;
}
int
linux_statfs(struct thread *td, struct linux_statfs_args *args)
{
struct l_statfs linux_statfs;
struct statfs bsd_statfs;
char *path;
int error, dev_shm;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(statfs))
printf(ARGS(statfs, "%s, *"), path);
#endif
dev_shm = 0;
error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
if (strncmp(path, "/dev/shm", sizeof("/dev/shm") - 1) == 0)
dev_shm = (path[8] == '\0'
|| (path[8] == '/' && path[9] == '\0'));
LFREEPATH(path);
if (error)
return (error);
bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
if (dev_shm)
linux_statfs.f_type = LINUX_SHMFS_MAGIC;
return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
}
static void
bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
{
linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
linux_statfs->f_bsize = bsd_statfs->f_bsize;
linux_statfs->f_blocks = bsd_statfs->f_blocks;
linux_statfs->f_bfree = bsd_statfs->f_bfree;
linux_statfs->f_bavail = bsd_statfs->f_bavail;
linux_statfs->f_ffree = bsd_statfs->f_ffree;
linux_statfs->f_files = bsd_statfs->f_files;
linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs->f_namelen = MAXNAMLEN;
}
int
linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
{
struct l_statfs64 linux_statfs;
struct statfs bsd_statfs;
char *path;
int error;
if (args->bufsize != sizeof(struct l_statfs64))
return EINVAL;
LCONVPATHEXIST(td, args->path, &path);
#ifdef DEBUG
if (ldebug(statfs64))
printf(ARGS(statfs64, "%s, *"), path);
#endif
error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
LFREEPATH(path);
if (error)
return (error);
bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
}
int
linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
{
struct l_statfs linux_statfs;
struct statfs bsd_statfs;
int error;
#ifdef DEBUG
if (ldebug(fstatfs))
printf(ARGS(fstatfs, "%d, *"), args->fd);
#endif
error = kern_fstatfs(td, args->fd, &bsd_statfs);
if (error)
return error;
bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
}
struct l_ustat
{
l_daddr_t f_tfree;
l_ino_t f_tinode;
char f_fname[6];
char f_fpack[6];
};
int
linux_ustat(struct thread *td, struct linux_ustat_args *args)
{
#ifdef DEBUG
if (ldebug(ustat))
printf(ARGS(ustat, "%d, *"), args->dev);
#endif
return (EOPNOTSUPP);
}
#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
static int
stat64_copyout(struct stat *buf, void *ubuf)
{
struct l_stat64 lbuf;
bzero(&lbuf, sizeof(lbuf));
lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8);
lbuf.st_ino = buf->st_ino;
lbuf.st_mode = buf->st_mode;
lbuf.st_nlink = buf->st_nlink;
lbuf.st_uid = buf->st_uid;
lbuf.st_gid = buf->st_gid;
lbuf.st_rdev = buf->st_rdev;
lbuf.st_size = buf->st_size;
lbuf.st_atim.tv_sec = buf->st_atim.tv_sec;
lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec;
lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec;
lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec;
lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec;
lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec;
lbuf.st_blksize = buf->st_blksize;
lbuf.st_blocks = buf->st_blocks;
/*
* The __st_ino field makes all the difference. In the Linux kernel
* it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
* but without the assignment to __st_ino the runtime linker refuses
* to mmap(2) any shared libraries. I guess it's broken alright :-)
*/
lbuf.__st_ino = buf->st_ino;
return (copyout(&lbuf, ubuf, sizeof(lbuf)));
}
int
linux_stat64(struct thread *td, struct linux_stat64_args *args)
{
struct stat buf;
char *filename;
int error;
LCONVPATHEXIST(td, args->filename, &filename);
#ifdef DEBUG
if (ldebug(stat64))
printf(ARGS(stat64, "%s, *"), filename);
#endif
error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf);
LFREEPATH(filename);
if (error)
return (error);
return (stat64_copyout(&buf, args->statbuf));
}
int
linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
{
struct stat sb;
char *filename;
int error;
LCONVPATHEXIST(td, args->filename, &filename);
#ifdef DEBUG
if (ldebug(lstat64))
printf(ARGS(lstat64, "%s, *"), args->filename);
#endif
error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb);
LFREEPATH(filename);
if (error)
return (error);
return (stat64_copyout(&sb, args->statbuf));
}
int
linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
{
struct stat buf;
int error;
#ifdef DEBUG
if (ldebug(fstat64))
printf(ARGS(fstat64, "%d, *"), args->fd);
#endif
error = kern_fstat(td, args->fd, &buf);
translate_fd_major_minor(td, args->fd, &buf);
if (!error)
error = stat64_copyout(&buf, args->statbuf);
return (error);
}
int
linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args)
{
char *path;
int error, dfd, flag;
struct stat buf;
if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
return (EINVAL);
flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ?
AT_SYMLINK_NOFOLLOW : 0;
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
#ifdef DEBUG
if (ldebug(fstatat64))
printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag);
#endif
error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf);
if (!error)
error = stat64_copyout(&buf, args->statbuf);
LFREEPATH(path);
return (error);
}
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */