1 files changed, 378 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_stats.c b/sys/compat/linux/linux_stats.c
new file mode 100644
index 0000000..566a618
--- /dev/null
+++ b/sys/compat/linux/linux_stats.c
@@ -0,0 +1,378 @@
+/*-
+ * 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>
+
+
+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)));
+}