procfs_vfsops.c revision 1.31
1 /* $NetBSD: procfs_vfsops.c,v 1.31 1999/02/26 23:44:46 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 vfs_getnewfsid(mp, MOUNT_PROCFS); 106 107 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 108 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 109 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 110 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 111 return (0); 112 } 113 114 /* 115 * unmount system call 116 */ 117 int 118 procfs_unmount(mp, mntflags, p) 119 struct mount *mp; 120 int mntflags; 121 struct proc *p; 122 { 123 int error; 124 int flags = 0; 125 126 if (mntflags & MNT_FORCE) 127 flags |= FORCECLOSE; 128 129 if ((error = vflush(mp, 0, flags)) != 0) 130 return (error); 131 132 return (0); 133 } 134 135 int 136 procfs_root(mp, vpp) 137 struct mount *mp; 138 struct vnode **vpp; 139 { 140 141 return (procfs_allocvp(mp, vpp, 0, Proot)); 142 } 143 144 /* ARGSUSED */ 145 int 146 procfs_start(mp, flags, p) 147 struct mount *mp; 148 int flags; 149 struct proc *p; 150 { 151 152 return (0); 153 } 154 155 /* 156 * Get file system statistics. 157 */ 158 int 159 procfs_statfs(mp, sbp, p) 160 struct mount *mp; 161 struct statfs *sbp; 162 struct proc *p; 163 { 164 165 sbp->f_bsize = PAGE_SIZE; 166 sbp->f_iosize = PAGE_SIZE; 167 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 168 sbp->f_bfree = 0; 169 sbp->f_bavail = 0; 170 sbp->f_files = maxproc; /* approx */ 171 sbp->f_ffree = maxproc - nprocs; /* approx */ 172 #ifdef COMPAT_09 173 sbp->f_type = 10; 174 #else 175 sbp->f_type = 0; 176 #endif 177 if (sbp != &mp->mnt_stat) { 178 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 179 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 180 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 181 } 182 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 183 return (0); 184 } 185 186 /*ARGSUSED*/ 187 int 188 procfs_quotactl(mp, cmds, uid, arg, p) 189 struct mount *mp; 190 int cmds; 191 uid_t uid; 192 caddr_t arg; 193 struct proc *p; 194 { 195 196 return (EOPNOTSUPP); 197 } 198 199 /*ARGSUSED*/ 200 int 201 procfs_sync(mp, waitfor, uc, p) 202 struct mount *mp; 203 int waitfor; 204 struct ucred *uc; 205 struct proc *p; 206 { 207 208 return (0); 209 } 210 211 /*ARGSUSED*/ 212 int 213 procfs_vget(mp, ino, vpp) 214 struct mount *mp; 215 ino_t ino; 216 struct vnode **vpp; 217 { 218 219 return (EOPNOTSUPP); 220 } 221 222 /*ARGSUSED*/ 223 int 224 procfs_fhtovp(mp, fhp, vpp) 225 struct mount *mp; 226 struct fid *fhp; 227 struct vnode **vpp; 228 { 229 230 return (EINVAL); 231 } 232 233 /*ARGSUSED*/ 234 int 235 procfs_checkexp(mp, mb, what, anon) 236 struct mount *mp; 237 struct mbuf *mb; 238 int *what; 239 struct ucred **anon; 240 { 241 242 return (EINVAL); 243 } 244 245 /*ARGSUSED*/ 246 int 247 procfs_vptofh(vp, fhp) 248 struct vnode *vp; 249 struct fid *fhp; 250 { 251 252 return (EINVAL); 253 } 254 255 void 256 procfs_init() 257 { 258 } 259 260 int 261 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 262 int *name; 263 u_int namelen; 264 void *oldp; 265 size_t *oldlenp; 266 void *newp; 267 size_t newlen; 268 struct proc *p; 269 { 270 return (EOPNOTSUPP); 271 } 272 273 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 274 275 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 276 &procfs_vnodeop_opv_desc, 277 NULL, 278 }; 279 280 struct vfsops procfs_vfsops = { 281 MOUNT_PROCFS, 282 procfs_mount, 283 procfs_start, 284 procfs_unmount, 285 procfs_root, 286 procfs_quotactl, 287 procfs_statfs, 288 procfs_sync, 289 procfs_vget, 290 procfs_fhtovp, 291 procfs_vptofh, 292 procfs_init, 293 procfs_sysctl, 294 NULL, /* vfs_mountroot */ 295 procfs_checkexp, 296 procfs_vnodeopv_descs, 297 }; 298
Indexes created Tue Sep 30 07:10:03 GMT 2025