procfs_vfsops.c revision 1.19
1 /* $NetBSD: procfs_vfsops.c,v 1.19 1994/09/15 03:42:44 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1993 Jan-Simon Pendry 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)procfs_vfsops.c 8.5 (Berkeley) 6/15/94 40 */ 41 42 /* 43 * procfs VFS interface 44 */ 45 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/kernel.h> 49 #include <sys/proc.h> 50 #include <sys/buf.h> 51 #include <sys/syslog.h> 52 #include <sys/mount.h> 53 #include <sys/signalvar.h> 54 #include <sys/vnode.h> 55 #include <miscfs/procfs/procfs.h> 56 #include <vm/vm.h> /* for PAGE_SIZE */ 57 58 /* 59 * VFS Operations. 60 * 61 * mount system call 62 */ 63 /* ARGSUSED */ 64 procfs_mount(mp, path, data, ndp, p) 65 struct mount *mp; 66 char *path; 67 caddr_t data; 68 struct nameidata *ndp; 69 struct proc *p; 70 { 71 u_int size; 72 73 if (UIO_MX & (UIO_MX-1)) { 74 log(LOG_ERR, "procfs: invalid directory entry size"); 75 return (EINVAL); 76 } 77 78 if (mp->mnt_flag & MNT_UPDATE) 79 return (EOPNOTSUPP); 80 81 mp->mnt_flag |= MNT_LOCAL; 82 mp->mnt_data = 0; 83 getnewfsid(mp, makefstype(MOUNT_PROCFS)); 84 85 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 86 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 87 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); 88 bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs")); 89 (void)procfs_statfs(mp, &mp_mnt_stat, p); 90 return (0); 91 } 92 93 /* 94 * unmount system call 95 */ 96 procfs_unmount(mp, mntflags, p) 97 struct mount *mp; 98 int mntflags; 99 struct proc *p; 100 { 101 int error; 102 extern int doforce; 103 int flags = 0; 104 105 if (mntflags & MNT_FORCE) { 106 /* procfs can never be rootfs so don't check for it */ 107 if (!doforce) 108 return (EINVAL); 109 flags |= FORCECLOSE; 110 } 111 112 if (error = vflush(mp, 0, flags)) 113 return (error); 114 115 return (0); 116 } 117 118 procfs_root(mp, vpp) 119 struct mount *mp; 120 struct vnode **vpp; 121 { 122 123 return (procfs_allocvp(mp, vpp, 0, Proot)); 124 } 125 126 /* ARGSUSED */ 127 procfs_start(mp, flags, p) 128 struct mount *mp; 129 int flags; 130 struct proc *p; 131 { 132 133 return (0); 134 } 135 136 /* 137 * Get file system statistics. 138 */ 139 procfs_statfs(mp, sbp, p) 140 struct mount *mp; 141 struct statfs *sbp; 142 struct proc *p; 143 { 144 145 #ifdef COMPAT_09 146 sbp->f_type = 10; 147 #else 148 sbp->f_type = 0; 149 #endif 150 sbp->f_bsize = PAGE_SIZE; 151 sbp->f_iosize = PAGE_SIZE; 152 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 153 sbp->f_bfree = 0; 154 sbp->f_bavail = 0; 155 sbp->f_files = maxproc; /* approx */ 156 sbp->f_ffree = maxproc - nprocs; /* approx */ 157 if (sbp != &mp->mnt_stat) { 158 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); 159 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 160 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 161 } 162 strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN); 163 sbp->f_fstypename[MFSNAMELEN] = '\0'; 164 return (0); 165 } 166 167 procfs_quotactl(mp, cmds, uid, arg, p) 168 struct mount *mp; 169 int cmds; 170 uid_t uid; 171 caddr_t arg; 172 struct proc *p; 173 { 174 175 return (EOPNOTSUPP); 176 } 177 178 procfs_sync(mp, waitfor) 179 struct mount *mp; 180 int waitfor; 181 { 182 183 return (0); 184 } 185 186 procfs_vget(mp, ino, vpp) 187 struct mount *mp; 188 ino_t ino; 189 struct vnode **vpp; 190 { 191 192 return (EOPNOTSUPP); 193 } 194 195 procfs_fhtovp(mp, fhp, vpp) 196 struct mount *mp; 197 struct fid *fhp; 198 struct vnode **vpp; 199 { 200 201 return (EINVAL); 202 } 203 204 procfs_vptofh(vp, fhp) 205 struct vnode *vp; 206 struct fid *fhp; 207 { 208 209 return (EINVAL); 210 } 211 212 procfs_init() 213 { 214 215 return (0); 216 } 217 218 struct vfsops procfs_vfsops = { 219 MOUNT_PROCFS, 220 procfs_mount, 221 procfs_start, 222 procfs_unmount, 223 procfs_root, 224 procfs_quotactl, 225 procfs_statfs, 226 procfs_sync, 227 procfs_vget, 228 procfs_fhtovp, 229 procfs_vptofh, 230 procfs_init, 231 }; 232
Indexes created Mon Sep 29 21:09:56 GMT 2025