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freebsd-dev/sys/compat/linux/linux_stats.c
Marcel Moolenaar dca60efcc9 Convert the filesystem type returned in struct statfs by syscalls 
linux_statfs and linux_fstatfs. Linux binaries testing this expect
the filesystem's magic number and not our vnode's tag.

PR: 15425
Tested by: Vladimir N. Silyaev <vsilyaev@mindspring.com>
2000-01-08 21:09:41 +00:00

380 lines
9.6 KiB
C
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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 withough 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <i386/linux/linux.h>
#include <i386/linux/linux_proto.h>
#include <i386/linux/linux_util.h>
#include <vm/vm_zone.h>
struct linux_newstat {
u_short stat_dev;
u_short __pad1;
u_long stat_ino;
u_short stat_mode;
u_short stat_nlink;
u_short stat_uid;
u_short stat_gid;
u_short stat_rdev;
u_short __pad2;
u_long stat_size;
u_long stat_blksize;
u_long stat_blocks;
u_long stat_atime;
u_long __unused1;
u_long stat_mtime;
u_long __unused2;
u_long stat_ctime;
u_long __unused3;
u_long __unused4;
u_long __unused5;
};
struct linux_ustat
{
int f_tfree;
u_long f_tinode;
char f_fname[6];
char f_fpack[6];
};
static int
newstat_copyout(struct stat *buf, void *ubuf)
{
struct linux_newstat tbuf;
tbuf.stat_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
tbuf.stat_ino = buf->st_ino;
tbuf.stat_mode = buf->st_mode;
tbuf.stat_nlink = buf->st_nlink;
tbuf.stat_uid = buf->st_uid;
tbuf.stat_gid = buf->st_gid;
tbuf.stat_rdev = buf->st_rdev;
tbuf.stat_size = buf->st_size;
tbuf.stat_atime = buf->st_atime;
tbuf.stat_mtime = buf->st_mtime;
tbuf.stat_ctime = buf->st_ctime;
tbuf.stat_blksize = buf->st_blksize;
tbuf.stat_blocks = buf->st_blocks;
return (copyout(&tbuf, ubuf, sizeof(tbuf)));
}
int
linux_newstat(struct proc *p, struct linux_newstat_args *args)
{
struct stat buf;
struct nameidata nd;
int error;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, args->path);
#ifdef DEBUG
printf("Linux-emul(%ld): newstat(%s, *)\n", (long)p->p_pid,
args->path);
#endif
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
args->path, p);
error = namei(&nd);
if (error)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
error = vn_stat(nd.ni_vp, &buf, p);
vput(nd.ni_vp);
if (error)
return (error);
return (newstat_copyout(&buf, args->buf));
}
/*
* Get file status; this version does not follow links.
*/
int
linux_newlstat(p, uap)
struct proc *p;
struct linux_newlstat_args *uap;
{
int error;
struct vnode *vp;
struct stat sb;
struct nameidata nd;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, uap->path);
#ifdef DEBUG
printf("Linux-emul(%ld): newlstat(%s, *)\n", (long)p->p_pid,
uap->path);
#endif
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
uap->path, p);
error = namei(&nd);
if (error)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);
vp = nd.ni_vp;
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
return (newstat_copyout(&sb, uap->buf));
}
int
linux_newfstat(struct proc *p, struct linux_newfstat_args *args)
{
struct filedesc *fdp;
struct file *fp;
struct stat buf;
int error;
fdp = p->p_fd;
#ifdef DEBUG
printf("Linux-emul(%ld): newfstat(%d, *)\n", (long)p->p_pid, args->fd);
#endif
if ((unsigned)args->fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[args->fd]) == NULL)
return (EBADF);
error = fo_stat(fp, &buf, p);
if (!error)
error = newstat_copyout(&buf, args->buf);
return (error);
}
struct linux_statfs_buf {
long ftype;
long fbsize;
long fblocks;
long fbfree;
long fbavail;
long ffiles;
long fffree;
linux_fsid_t ffsid;
long fnamelen;
long fspare[6];
};
#ifndef VT_NWFS
#define VT_NWFS VT_TFS /* XXX - bug compatibility with sys/nwfs/nwfs_node.h */
#endif
#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 */
/*
* ext2fs uses the VT_UFS tag. A mounted ext2 filesystem will therefore
* be seen as an ufs/mfs filesystem.
*/
static long
bsd_to_linux_ftype(int tag)
{
switch (tag) {
case VT_CODA:
return (LINUX_CODA_SUPER_MAGIC);
case VT_HPFS:
return (LINUX_HPFS_SUPER_MAGIC);
case VT_ISOFS:
return (LINUX_ISOFS_SUPER_MAGIC);
case VT_MFS:
return (LINUX_UFS_SUPER_MAGIC);
case VT_MSDOSFS:
return (LINUX_MSDOS_SUPER_MAGIC);
case VT_NFS:
return (LINUX_NFS_SUPER_MAGIC);
case VT_NTFS:
return (LINUX_NTFS_SUPER_MAGIC);
case VT_NWFS:
return (LINUX_NCP_SUPER_MAGIC);
case VT_PROCFS:
return (LINUX_PROC_SUPER_MAGIC);
case VT_UFS:
return (LINUX_UFS_SUPER_MAGIC);
}
return (0L);
}
int
linux_statfs(struct proc *p, struct linux_statfs_args *args)
{
struct mount *mp;
struct nameidata *ndp;
struct statfs *bsd_statfs;
struct nameidata nd;
struct linux_statfs_buf linux_statfs_buf;
int error;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, args->path);
#ifdef DEBUG
printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path);
#endif
ndp = &nd;
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc);
error = namei(ndp);
if (error)
return error;
NDFREE(ndp, NDF_ONLY_PNBUF);
mp = ndp->ni_vp->v_mount;
bsd_statfs = &mp->mnt_stat;
vrele(ndp->ni_vp);
error = VFS_STATFS(mp, bsd_statfs, p);
if (error)
return error;
bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
linux_statfs_buf.ftype = bsd_to_linux_ftype(bsd_statfs->f_type);
linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
linux_statfs_buf.fffree = bsd_statfs->f_ffree;
linux_statfs_buf.ffiles = bsd_statfs->f_files;
linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs_buf.fnamelen = MAXNAMLEN;
return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
sizeof(struct linux_statfs_buf));
}
int
linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args)
{
struct file *fp;
struct mount *mp;
struct statfs *bsd_statfs;
struct linux_statfs_buf linux_statfs_buf;
int error;
#ifdef DEBUG
printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd);
#endif
error = getvnode(p->p_fd, args->fd, &fp);
if (error)
return error;
mp = ((struct vnode *)fp->f_data)->v_mount;
bsd_statfs = &mp->mnt_stat;
error = VFS_STATFS(mp, bsd_statfs, p);
if (error)
return error;
bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
linux_statfs_buf.ftype = bsd_to_linux_ftype(bsd_statfs->f_type);
linux_statfs_buf.fbsize = bsd_statfs->f_bsize;
linux_statfs_buf.fblocks = bsd_statfs->f_blocks;
linux_statfs_buf.fbfree = bsd_statfs->f_bfree;
linux_statfs_buf.fbavail = bsd_statfs->f_bavail;
linux_statfs_buf.fffree = bsd_statfs->f_ffree;
linux_statfs_buf.ffiles = bsd_statfs->f_files;
linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0];
linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1];
linux_statfs_buf.fnamelen = MAXNAMLEN;
return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf,
sizeof(struct linux_statfs_buf));
}
int
linux_ustat(p, uap)
struct proc *p;
struct linux_ustat_args *uap;
{
struct linux_ustat lu;
dev_t dev;
struct vnode *vp;
struct statfs *stat;
int error;
#ifdef DEBUG
printf("Linux-emul(%ld): ustat(%d, *)\n", (long)p->p_pid, uap->dev);
#endif
/*
* lu.f_fname and lu.f_fpack are not used. They are always zeroed.
* lu.f_tinode and lu.f_tfree are set from the device's super block.
*/
bzero(&lu, sizeof(lu));
/*
* XXX - Don't return an error if we can't find a vnode for the
* device. Our dev_t is 32-bits whereas Linux only has a 16-bits
* dev_t. The dev_t that is used now may as well be a truncated
* dev_t returned from previous syscalls. Just return a bzeroed
* ustat in that case.
*/
dev = makebdev(uap->dev >> 8, uap->dev & 0xFF);
if (vfinddev(dev, VBLK, &vp)) {
if (vp->v_mount == NULL)
return (EINVAL);
stat = &(vp->v_mount->mnt_stat);
error = VFS_STATFS(vp->v_mount, stat, p);
if (error)
return (error);
lu.f_tfree = stat->f_bfree;
lu.f_tinode = stat->f_ffree;
}
return (copyout(&lu, uap->ubuf, sizeof(lu)));
}
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