/* $OpenBSD: vfs_syscalls_25.c,v 1.8 2006/03/05 21:48:54 miod Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 */ #include #include #include #include #include #include #include #include #include #include #include #include void statfs_to_ostatfs(struct proc *, struct mount *, struct statfs *, struct ostatfs *); /* * Convert struct statfs -> struct ostatfs */ void statfs_to_ostatfs(p, mp, sp, osp) struct proc *p; struct mount *mp; struct statfs *sp; struct ostatfs *osp; { #ifdef COMPAT_43 osp->f_type = mp->mnt_vfc->vfc_typenum; #else osp->f_type = 0; #endif osp->f_flags = mp->mnt_flag & 0xffff; osp->f_bsize = sp->f_bsize; osp->f_iosize = sp->f_iosize; osp->f_blocks = sp->f_blocks; osp->f_bfree = sp->f_bfree; osp->f_bavail = sp->f_bavail; osp->f_files = sp->f_files; osp->f_ffree = sp->f_ffree; /* Don't let non-root see filesystem id (for NFS security) */ if (suser(p, 0)) osp->f_fsid.val[0] = osp->f_fsid.val[1] = 0; else bcopy(&sp->f_fsid, &osp->f_fsid, sizeof(osp->f_fsid)); osp->f_owner = sp->f_owner; osp->f_syncwrites = sp->f_syncwrites; osp->f_asyncwrites = sp->f_asyncwrites; bcopy(sp->f_fstypename, osp->f_fstypename, MFSNAMELEN); bcopy(sp->f_mntonname, osp->f_mntonname, MNAMELEN); bcopy(sp->f_mntfromname, osp->f_mntfromname, MNAMELEN); } /* * Get filesystem statistics. */ /* ARGSUSED */ int compat_25_sys_statfs(p, v, retval) struct proc *p; void *v; register_t *retval; { register struct compat_25_sys_statfs_args /* { syscallarg(char *) path; syscallarg(struct ostatfs *) buf; } */ *uap = v; register struct mount *mp; register struct statfs *sp; struct ostatfs osb; int error; struct nameidata nd; NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); if ((error = namei(&nd)) != 0) return (error); mp = nd.ni_vp->v_mount; sp = &mp->mnt_stat; vrele(nd.ni_vp); if ((error = VFS_STATFS(mp, sp, p)) != 0) return (error); statfs_to_ostatfs(p, mp, sp, &osb); return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb))); } /* * Get filesystem statistics. */ /* ARGSUSED */ int compat_25_sys_fstatfs(p, v, retval) struct proc *p; void *v; register_t *retval; { struct compat_25_sys_fstatfs_args /* { syscallarg(int) fd; syscallarg(struct ostatfs *) buf; } */ *uap = v; struct file *fp; struct mount *mp; struct statfs *sp; struct ostatfs osb; int error; if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) return (error); mp = ((struct vnode *)fp->f_data)->v_mount; sp = &mp->mnt_stat; error = VFS_STATFS(mp, sp, p); FRELE(fp); if (error) return (error); statfs_to_ostatfs(p, mp, sp, &osb); return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb))); } /* * Get statistics on all filesystems. */ int compat_25_sys_getfsstat(p, v, retval) struct proc *p; void *v; register_t *retval; { register struct compat_25_sys_getfsstat_args /* { syscallarg(struct ostatfs *) buf; syscallarg(long) bufsize; syscallarg(int) flags; } */ *uap = v; register struct mount *mp, *nmp; register struct statfs *sp; struct ostatfs osb; caddr_t sfsp; long count, maxcount; int error, flags = SCARG(uap, flags); maxcount = SCARG(uap, bufsize) / sizeof(struct ostatfs); sfsp = (caddr_t)SCARG(uap, buf); count = 0; simple_lock(&mountlist_slock); for (mp = CIRCLEQ_FIRST(&mountlist); mp != CIRCLEQ_END(&mountlist); mp = nmp) { if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { nmp = CIRCLEQ_NEXT(mp, mnt_list); continue; } if (sfsp && count < maxcount) { sp = &mp->mnt_stat; /* Refresh stats unless MNT_NOWAIT is specified */ if (flags != MNT_NOWAIT && flags != MNT_LAZY && (flags == MNT_WAIT || flags == 0) && (error = VFS_STATFS(mp, sp, p))) { simple_lock(&mountlist_slock); nmp = CIRCLEQ_NEXT(mp, mnt_list); vfs_unbusy(mp); continue; } statfs_to_ostatfs(p, mp, sp, &osb); error = copyout((caddr_t)&osb, sfsp, sizeof(osb)); if (error) { vfs_unbusy(mp); return (error); } sfsp += sizeof(osb); } count++; simple_lock(&mountlist_slock); nmp = CIRCLEQ_NEXT(mp, mnt_list); vfs_unbusy(mp); } simple_unlock(&mountlist_slock); if (sfsp && count > maxcount) *retval = maxcount; else *retval = count; return (0); }