procfs_vfsops.c revision 1.1.1.2
1 /* 2 * Copyright (c) 1993 Jan-Simon Pendry 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95 38 * 39 * From: 40 * $Id: procfs_vfsops.c,v 1.1.1.2 1998/03/01 02:13:20 fvdl Exp $ 41 */ 42 43 /* 44 * procfs VFS interface 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/time.h> 50 #include <sys/kernel.h> 51 #include <sys/proc.h> 52 #include <sys/buf.h> 53 #include <sys/syslog.h> 54 #include <sys/mount.h> 55 #include <sys/signalvar.h> 56 #include <sys/vnode.h> 57 #include <miscfs/procfs/procfs.h> 58 #include <vm/vm.h> /* for PAGE_SIZE */ 59 60 /* 61 * VFS Operations. 62 * 63 * mount system call 64 */ 65 /* ARGSUSED */ 66 procfs_mount(mp, path, data, ndp, p) 67 struct mount *mp; 68 char *path; 69 caddr_t data; 70 struct nameidata *ndp; 71 struct proc *p; 72 { 73 u_int size; 74 75 if (UIO_MX & (UIO_MX-1)) { 76 log(LOG_ERR, "procfs: invalid directory entry size"); 77 return (EINVAL); 78 } 79 80 if (mp->mnt_flag & MNT_UPDATE) 81 return (EOPNOTSUPP); 82 83 mp->mnt_flag |= MNT_LOCAL; 84 mp->mnt_data = 0; 85 vfs_getnewfsid(mp); 86 87 (void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size); 88 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 89 90 size = sizeof("procfs") - 1; 91 bcopy("procfs", mp->mnt_stat.f_mntfromname, size); 92 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 93 94 return (0); 95 } 96 97 /* 98 * unmount system call 99 */ 100 procfs_unmount(mp, mntflags, p) 101 struct mount *mp; 102 int mntflags; 103 struct proc *p; 104 { 105 int error; 106 int flags = 0; 107 108 if (mntflags & MNT_FORCE) 109 flags |= FORCECLOSE; 110 111 if (error = vflush(mp, 0, flags)) 112 return (error); 113 114 return (0); 115 } 116 117 procfs_root(mp, vpp) 118 struct mount *mp; 119 struct vnode **vpp; 120 { 121 122 return (procfs_allocvp(mp, vpp, 0, Proot)); 123 } 124 125 /* ARGSUSED */ 126 procfs_start(mp, flags, p) 127 struct mount *mp; 128 int flags; 129 struct proc *p; 130 { 131 132 return (0); 133 } 134 135 /* 136 * Get file system statistics. 137 */ 138 procfs_statfs(mp, sbp, p) 139 struct mount *mp; 140 struct statfs *sbp; 141 struct proc *p; 142 { 143 sbp->f_bsize = PAGE_SIZE; 144 sbp->f_iosize = PAGE_SIZE; 145 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 146 sbp->f_bfree = 0; 147 sbp->f_bavail = 0; 148 sbp->f_files = maxproc; /* approx */ 149 sbp->f_ffree = maxproc - nprocs; /* approx */ 150 151 if (sbp != &mp->mnt_stat) { 152 sbp->f_type = mp->mnt_vfc->vfc_typenum; 153 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); 154 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 155 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 156 } 157 158 return (0); 159 } 160 161 procfs_init(vfsp) 162 struct vfsconf *vfsp; 163 { 164 165 return (0); 166 } 167 168 #define procfs_fhtovp ((int (*) __P((struct mount *, struct fid *, \ 169 struct mbuf *, struct vnode **, int *, struct ucred **)))einval) 170 #define procfs_quotactl ((int (*) __P((struct mount *, int, uid_t, caddr_t, \ 171 struct proc *)))eopnotsupp) 172 #define procfs_sync ((int (*) __P((struct mount *, int, struct ucred *, \ 173 struct proc *)))nullop) 174 #define procfs_sysctl ((int (*) __P((int *, u_int, void *, size_t *, void *, \ 175 size_t, struct proc *)))eopnotsupp) 176 #define procfs_vget ((int (*) __P((struct mount *, ino_t, struct vnode **))) \ 177 eopnotsupp) 178 #define procfs_vptofh ((int (*) __P((struct vnode *, struct fid *)))einval) 179 180 struct vfsops procfs_vfsops = { 181 procfs_mount, 182 procfs_start, 183 procfs_unmount, 184 procfs_root, 185 procfs_quotactl, 186 procfs_statfs, 187 procfs_sync, 188 procfs_vget, 189 procfs_fhtovp, 190 procfs_vptofh, 191 procfs_init, 192 procfs_sysctl, 193 }; 194
Indexes created Mon Sep 29 21:09:56 GMT 2025