procfs_vfsops.c revision 1.31.14.1
1 /* $NetBSD: procfs_vfsops.c,v 1.31.14.1 1999/12/21 23:20:00 wrstuden 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 8.7 (Berkeley) 5/10/95 40 */ 41 42 /* 43 * procfs VFS interface 44 */ 45 46 #if defined(_KERNEL) && !defined(_LKM) 47 #include "opt_compat_netbsd.h" 48 #endif 49 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/kernel.h> 53 #include <sys/systm.h> 54 #include <sys/proc.h> 55 #include <sys/buf.h> 56 #include <sys/syslog.h> 57 #include <sys/mount.h> 58 #include <sys/signalvar.h> 59 #include <sys/vnode.h> 60 #include <miscfs/procfs/procfs.h> 61 #include <vm/vm.h> /* for PAGE_SIZE */ 62 63 void procfs_init __P((void)); 64 int procfs_mount __P((struct mount *, const char *, void *, 65 struct nameidata *, struct proc *)); 66 int procfs_start __P((struct mount *, int, struct proc *)); 67 int procfs_unmount __P((struct mount *, int, struct proc *)); 68 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 69 struct proc *)); 70 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 71 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 72 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 73 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 74 int procfs_checkexp __P((struct mount *, struct mbuf *, int *, 75 struct ucred **)); 76 int procfs_vptofh __P((struct vnode *, struct fid *)); 77 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 78 struct proc *)); 79 /* 80 * VFS Operations. 81 * 82 * mount system call 83 */ 84 /* ARGSUSED */ 85 int 86 procfs_mount(mp, path, data, ndp, p) 87 struct mount *mp; 88 const char *path; 89 void *data; 90 struct nameidata *ndp; 91 struct proc *p; 92 { 93 size_t size; 94 95 if (UIO_MX & (UIO_MX-1)) { 96 log(LOG_ERR, "procfs: invalid directory entry size"); 97 return (EINVAL); 98 } 99 100 if (mp->mnt_flag & MNT_UPDATE) 101 return (EOPNOTSUPP); 102 103 mp->mnt_flag |= MNT_LOCAL; 104 mp->mnt_data = 0; 105 mp->mnt_bshift = DEF_BSHIFT; 106 vfs_getnewfsid(mp, MOUNT_PROCFS); 107 108 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 109 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 110 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 111 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 112 return (0); 113 } 114 115 /* 116 * unmount system call 117 */ 118 int 119 procfs_unmount(mp, mntflags, p) 120 struct mount *mp; 121 int mntflags; 122 struct proc *p; 123 { 124 int error; 125 int flags = 0; 126 127 if (mntflags & MNT_FORCE) 128 flags |= FORCECLOSE; 129 130 if ((error = vflush(mp, 0, flags)) != 0) 131 return (error); 132 133 return (0); 134 } 135 136 int 137 procfs_root(mp, vpp) 138 struct mount *mp; 139 struct vnode **vpp; 140 { 141 142 return (procfs_allocvp(mp, vpp, 0, Proot)); 143 } 144 145 /* ARGSUSED */ 146 int 147 procfs_start(mp, flags, p) 148 struct mount *mp; 149 int flags; 150 struct proc *p; 151 { 152 153 return (0); 154 } 155 156 /* 157 * Get file system statistics. 158 */ 159 int 160 procfs_statfs(mp, sbp, p) 161 struct mount *mp; 162 struct statfs *sbp; 163 struct proc *p; 164 { 165 166 sbp->f_bsize = PAGE_SIZE; 167 sbp->f_iosize = PAGE_SIZE; 168 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 169 sbp->f_bfree = 0; 170 sbp->f_bavail = 0; 171 sbp->f_files = maxproc; /* approx */ 172 sbp->f_ffree = maxproc - nprocs; /* approx */ 173 #ifdef COMPAT_09 174 sbp->f_type = 10; 175 #else 176 sbp->f_type = 0; 177 #endif 178 if (sbp != &mp->mnt_stat) { 179 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 180 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 181 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 182 } 183 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 184 return (0); 185 } 186 187 /*ARGSUSED*/ 188 int 189 procfs_quotactl(mp, cmds, uid, arg, p) 190 struct mount *mp; 191 int cmds; 192 uid_t uid; 193 caddr_t arg; 194 struct proc *p; 195 { 196 197 return (EOPNOTSUPP); 198 } 199 200 /*ARGSUSED*/ 201 int 202 procfs_sync(mp, waitfor, uc, p) 203 struct mount *mp; 204 int waitfor; 205 struct ucred *uc; 206 struct proc *p; 207 { 208 209 return (0); 210 } 211 212 /*ARGSUSED*/ 213 int 214 procfs_vget(mp, ino, vpp) 215 struct mount *mp; 216 ino_t ino; 217 struct vnode **vpp; 218 { 219 220 return (EOPNOTSUPP); 221 } 222 223 /*ARGSUSED*/ 224 int 225 procfs_fhtovp(mp, fhp, vpp) 226 struct mount *mp; 227 struct fid *fhp; 228 struct vnode **vpp; 229 { 230 231 return (EINVAL); 232 } 233 234 /*ARGSUSED*/ 235 int 236 procfs_checkexp(mp, mb, what, anon) 237 struct mount *mp; 238 struct mbuf *mb; 239 int *what; 240 struct ucred **anon; 241 { 242 243 return (EINVAL); 244 } 245 246 /*ARGSUSED*/ 247 int 248 procfs_vptofh(vp, fhp) 249 struct vnode *vp; 250 struct fid *fhp; 251 { 252 253 return (EINVAL); 254 } 255 256 void 257 procfs_init() 258 { 259 } 260 261 int 262 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 263 int *name; 264 u_int namelen; 265 void *oldp; 266 size_t *oldlenp; 267 void *newp; 268 size_t newlen; 269 struct proc *p; 270 { 271 return (EOPNOTSUPP); 272 } 273 274 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 275 276 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 277 &procfs_vnodeop_opv_desc, 278 NULL, 279 }; 280 281 struct vfsops procfs_vfsops = { 282 MOUNT_PROCFS, 283 procfs_mount, 284 procfs_start, 285 procfs_unmount, 286 procfs_root, 287 procfs_quotactl, 288 procfs_statfs, 289 procfs_sync, 290 procfs_vget, 291 procfs_fhtovp, 292 procfs_vptofh, 293 procfs_init, 294 procfs_sysctl, 295 NULL, /* vfs_mountroot */ 296 procfs_checkexp, 297 procfs_vnodeopv_descs, 298 }; 299
Indexes created Mon Sep 29 21:09:56 GMT 2025