Annotation of sys/compat/common/vfs_syscalls_25.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: vfs_syscalls_25.c,v 1.12 2006/06/25 15:01:53 sturm Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1989, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: * (c) UNIX System Laboratories, Inc.
! 7: * All or some portions of this file are derived from material licensed
! 8: * to the University of California by American Telephone and Telegraph
! 9: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 10: * the permission of UNIX System Laboratories, Inc.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. Neither the name of the University nor the names of its contributors
! 21: * may be used to endorse or promote products derived from this software
! 22: * without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: * @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94
! 37: */
! 38:
! 39: #include <sys/param.h>
! 40: #include <sys/systm.h>
! 41: #include <sys/namei.h>
! 42: #include <sys/filedesc.h>
! 43: #include <sys/kernel.h>
! 44: #include <sys/file.h>
! 45: #include <sys/vnode.h>
! 46: #include <sys/mount.h>
! 47: #include <sys/proc.h>
! 48: #include <sys/uio.h>
! 49: #include <sys/dirent.h>
! 50:
! 51: #include <sys/syscallargs.h>
! 52:
! 53: void statfs_to_ostatfs(struct proc *, struct mount *, struct statfs *, struct ostatfs *);
! 54:
! 55: /*
! 56: * Convert struct statfs -> struct ostatfs
! 57: */
! 58: void
! 59: statfs_to_ostatfs(p, mp, sp, osp)
! 60: struct proc *p;
! 61: struct mount *mp;
! 62: struct statfs *sp;
! 63: struct ostatfs *osp;
! 64: {
! 65: #ifdef COMPAT_43
! 66: osp->f_type = mp->mnt_vfc->vfc_typenum;
! 67: #else
! 68: osp->f_type = 0;
! 69: #endif
! 70: osp->f_flags = mp->mnt_flag & 0xffff;
! 71: osp->f_bsize = sp->f_bsize;
! 72: osp->f_iosize = sp->f_iosize;
! 73: osp->f_blocks = sp->f_blocks;
! 74: osp->f_bfree = sp->f_bfree;
! 75: osp->f_bavail = sp->f_bavail;
! 76: osp->f_files = sp->f_files;
! 77: osp->f_ffree = sp->f_ffree;
! 78: /* Don't let non-root see filesystem id (for NFS security) */
! 79: if (suser(p, 0))
! 80: osp->f_fsid.val[0] = osp->f_fsid.val[1] = 0;
! 81: else
! 82: bcopy(&sp->f_fsid, &osp->f_fsid, sizeof(osp->f_fsid));
! 83: osp->f_owner = sp->f_owner;
! 84: osp->f_syncwrites = sp->f_syncwrites;
! 85: osp->f_asyncwrites = sp->f_asyncwrites;
! 86: bcopy(sp->f_fstypename, osp->f_fstypename, MFSNAMELEN);
! 87: bcopy(sp->f_mntonname, osp->f_mntonname, MNAMELEN);
! 88: bcopy(sp->f_mntfromname, osp->f_mntfromname, MNAMELEN);
! 89: }
! 90:
! 91: /*
! 92: * Get filesystem statistics.
! 93: */
! 94: /* ARGSUSED */
! 95: int
! 96: compat_25_sys_statfs(p, v, retval)
! 97: struct proc *p;
! 98: void *v;
! 99: register_t *retval;
! 100: {
! 101: register struct compat_25_sys_statfs_args /* {
! 102: syscallarg(char *) path;
! 103: syscallarg(struct ostatfs *) buf;
! 104: } */ *uap = v;
! 105: register struct mount *mp;
! 106: register struct statfs *sp;
! 107: struct ostatfs osb;
! 108: int error;
! 109: struct nameidata nd;
! 110:
! 111: NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
! 112: if ((error = namei(&nd)) != 0)
! 113: return (error);
! 114: mp = nd.ni_vp->v_mount;
! 115: sp = &mp->mnt_stat;
! 116: vrele(nd.ni_vp);
! 117: if ((error = VFS_STATFS(mp, sp, p)) != 0)
! 118: return (error);
! 119:
! 120: statfs_to_ostatfs(p, mp, sp, &osb);
! 121: return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb)));
! 122: }
! 123:
! 124: /*
! 125: * Get filesystem statistics.
! 126: */
! 127: /* ARGSUSED */
! 128: int
! 129: compat_25_sys_fstatfs(p, v, retval)
! 130: struct proc *p;
! 131: void *v;
! 132: register_t *retval;
! 133: {
! 134: struct compat_25_sys_fstatfs_args /* {
! 135: syscallarg(int) fd;
! 136: syscallarg(struct ostatfs *) buf;
! 137: } */ *uap = v;
! 138: struct file *fp;
! 139: struct mount *mp;
! 140: struct statfs *sp;
! 141: struct ostatfs osb;
! 142: int error;
! 143:
! 144: if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
! 145: return (error);
! 146: mp = ((struct vnode *)fp->f_data)->v_mount;
! 147: sp = &mp->mnt_stat;
! 148: error = VFS_STATFS(mp, sp, p);
! 149: FRELE(fp);
! 150: if (error)
! 151: return (error);
! 152:
! 153: statfs_to_ostatfs(p, mp, sp, &osb);
! 154: return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb)));
! 155: }
! 156:
! 157: /*
! 158: * Get statistics on all filesystems.
! 159: */
! 160: int
! 161: compat_25_sys_getfsstat(p, v, retval)
! 162: struct proc *p;
! 163: void *v;
! 164: register_t *retval;
! 165: {
! 166: register struct compat_25_sys_getfsstat_args /* {
! 167: syscallarg(struct ostatfs *) buf;
! 168: syscallarg(long) bufsize;
! 169: syscallarg(int) flags;
! 170: } */ *uap = v;
! 171: register struct mount *mp, *nmp;
! 172: register struct statfs *sp;
! 173: struct ostatfs osb;
! 174: caddr_t sfsp;
! 175: long count, maxcount;
! 176: int error, flags = SCARG(uap, flags);
! 177:
! 178: maxcount = SCARG(uap, bufsize) / sizeof(struct ostatfs);
! 179: sfsp = (caddr_t)SCARG(uap, buf);
! 180: count = 0;
! 181:
! 182: for (mp = CIRCLEQ_FIRST(&mountlist); mp != CIRCLEQ_END(&mountlist);
! 183: mp = nmp) {
! 184: if (vfs_busy(mp, VB_READ|VB_NOWAIT)) {
! 185: nmp = CIRCLEQ_NEXT(mp, mnt_list);
! 186: continue;
! 187: }
! 188: if (sfsp && count < maxcount) {
! 189: sp = &mp->mnt_stat;
! 190:
! 191: /* Refresh stats unless MNT_NOWAIT is specified */
! 192: if (flags != MNT_NOWAIT &&
! 193: flags != MNT_LAZY &&
! 194: (flags == MNT_WAIT ||
! 195: flags == 0) &&
! 196: (error = VFS_STATFS(mp, sp, p))) {
! 197: nmp = CIRCLEQ_NEXT(mp, mnt_list);
! 198: vfs_unbusy(mp);
! 199: continue;
! 200: }
! 201:
! 202: statfs_to_ostatfs(p, mp, sp, &osb);
! 203: error = copyout((caddr_t)&osb, sfsp, sizeof(osb));
! 204: if (error) {
! 205: vfs_unbusy(mp);
! 206: return (error);
! 207: }
! 208: sfsp += sizeof(osb);
! 209: }
! 210: count++;
! 211: nmp = CIRCLEQ_NEXT(mp, mnt_list);
! 212: vfs_unbusy(mp);
! 213: }
! 214:
! 215: if (sfsp && count > maxcount)
! 216: *retval = maxcount;
! 217: else
! 218: *retval = count;
! 219:
! 220: return (0);
! 221: }
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