/*- * 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: src/sys/compat/linux/linux_stats.c,v 1.22.2.3 2001/11/05 19:08:23 marcel Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int newstat_copyout(struct stat *buf, void *ubuf) { struct l_newstat tbuf; struct cdevsw *cdevsw; dev_t dev; tbuf.st_dev = uminor(buf->st_dev) | (umajor(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_atime = buf->st_atime; tbuf.st_mtime = buf->st_mtime; tbuf.st_ctime = buf->st_ctime; tbuf.st_blksize = buf->st_blksize; tbuf.st_blocks = buf->st_blocks; /* Lie about disk drives which are character devices * in FreeBSD but block devices under Linux. */ if (S_ISCHR(tbuf.st_mode) && (dev = udev2dev(buf->st_rdev, 0)) != NODEV) { cdevsw = devsw(dev); if (cdevsw != NULL && (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 = uminor(buf->st_dev) & 0xf; tbuf.st_rdev = buf->st_rdev & 0xff; } } 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 if (ldebug(newstat)) printf(ARGS(newstat, "%s, *"), 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)); } int linux_newlstat(struct proc *p, struct linux_newlstat_args *args) { int error; struct stat sb; struct nameidata nd; caddr_t sg; sg = stackgap_init(); CHECKALTEXIST(p, &sg, args->path); #ifdef DEBUG if (ldebug(newlstat)) printf(ARGS(newlstat, "%s, *"), args->path); #endif NDINIT(&nd, LOOKUP, NOFOLLOW | 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, &sb, p); vput(nd.ni_vp); if (error) return (error); return (newstat_copyout(&sb, args->buf)); } int linux_newfstat(struct proc *p, struct linux_newfstat_args *args) { struct filedesc *fdp; struct file *fp; struct stat buf; int error; #ifdef DEBUG if (ldebug(newfstat)) printf(ARGS(newfstat, "%d, *"), args->fd); #endif fdp = p->p_fd; 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); } /* 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 */ 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}, {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); } 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 l_statfs linux_statfs; int error; caddr_t sg; sg = stackgap_init(); CHECKALTEXIST(p, &sg, args->path); #ifdef DEBUG if (ldebug(statfs)) printf(ARGS(statfs, "%s, *"), 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.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; return copyout((caddr_t)&linux_statfs, (caddr_t)args->buf, sizeof(linux_statfs)); } int linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args) { struct file *fp; struct mount *mp; struct statfs *bsd_statfs; struct l_statfs linux_statfs; int error; #ifdef DEBUG if (ldebug(fstatfs)) printf(ARGS(fstatfs, "%d, *"), 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.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; return copyout((caddr_t)&linux_statfs, (caddr_t)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 proc *p, struct linux_ustat_args *args) { struct l_ustat lu; dev_t dev; struct vnode *vp; struct statfs *stat; int error; #ifdef DEBUG if (ldebug(ustat)) printf(ARGS(ustat, "%d, *"), args->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 = makedev(args->dev >> 8, args->dev & 0xFF); if (vfinddev(dev, VCHR, &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, args->ubuf, sizeof(lu))); } #if defined(__i386__) static int stat64_copyout(struct stat *buf, void *ubuf) { struct l_stat64 lbuf; bzero(&lbuf, sizeof(lbuf)); lbuf.st_dev = uminor(buf->st_dev) | (umajor(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_atime = buf->st_atime; lbuf.st_mtime = buf->st_mtime; lbuf.st_ctime = buf->st_ctime; 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 proc *p, struct linux_stat64_args *args) { struct stat buf; struct nameidata nd; int error; caddr_t sg; sg = stackgap_init(); CHECKALTEXIST(p, &sg, args->filename); #ifdef DEBUG if (ldebug(stat64)) printf(ARGS(stat64, "%s, *"), args->filename); #endif NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, args->filename, 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 (stat64_copyout(&buf, args->statbuf)); } int linux_lstat64(struct proc *p, struct linux_lstat64_args *args) { int error; struct stat sb; struct nameidata nd; caddr_t sg; sg = stackgap_init(); CHECKALTEXIST(p, &sg, args->filename); #ifdef DEBUG if (ldebug(lstat64)) printf(ARGS(lstat64, "%s, *"), args->filename); #endif NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, args->filename, p); error = namei(&nd); if (error) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = vn_stat(nd.ni_vp, &sb, p); vput(nd.ni_vp); if (error) return (error); return (stat64_copyout(&sb, args->statbuf)); } int linux_fstat64(struct proc *p, struct linux_fstat64_args *args) { struct filedesc *fdp; struct file *fp; struct stat buf; int error; #ifdef DEBUG if (ldebug(fstat64)) printf(ARGS(fstat64, "%d, *"), args->fd); #endif fdp = p->p_fd; 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 = stat64_copyout(&buf, args->statbuf); return (error); } #endif /* __i386__ */