procfs_vfsops.c revision 1.32
1 /* $NetBSD: procfs_vfsops.c,v 1.32 2000/01/25 21:52:04 fvdl 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 <sys/malloc.h> 61 #include <miscfs/procfs/procfs.h> 62 #include <vm/vm.h> /* for PAGE_SIZE */ 63 64 void procfs_init __P((void)); 65 int procfs_mount __P((struct mount *, const char *, void *, 66 struct nameidata *, struct proc *)); 67 int procfs_start __P((struct mount *, int, struct proc *)); 68 int procfs_unmount __P((struct mount *, int, struct proc *)); 69 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 70 struct proc *)); 71 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 72 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 73 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 74 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 75 int procfs_checkexp __P((struct mount *, struct mbuf *, int *, 76 struct ucred **)); 77 int procfs_vptofh __P((struct vnode *, struct fid *)); 78 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 79 struct proc *)); 80 /* 81 * VFS Operations. 82 * 83 * mount system call 84 */ 85 /* ARGSUSED */ 86 int 87 procfs_mount(mp, path, data, ndp, p) 88 struct mount *mp; 89 const char *path; 90 void *data; 91 struct nameidata *ndp; 92 struct proc *p; 93 { 94 size_t size; 95 struct procfsmount *pmnt; 96 97 if (UIO_MX & (UIO_MX-1)) { 98 log(LOG_ERR, "procfs: invalid directory entry size"); 99 return (EINVAL); 100 } 101 102 if (mp->mnt_flag & MNT_UPDATE) 103 return (EOPNOTSUPP); 104 105 mp->mnt_flag |= MNT_LOCAL; 106 pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), 107 M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ 108 109 mp->mnt_data = (qaddr_t)pmnt; 110 vfs_getnewfsid(mp, MOUNT_PROCFS); 111 112 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 113 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 114 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 115 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 116 117 pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); 118 pmnt->pmnt_mp = mp; 119 120 return (0); 121 } 122 123 /* 124 * unmount system call 125 */ 126 int 127 procfs_unmount(mp, mntflags, p) 128 struct mount *mp; 129 int mntflags; 130 struct proc *p; 131 { 132 int error; 133 int flags = 0; 134 135 if (mntflags & MNT_FORCE) 136 flags |= FORCECLOSE; 137 138 if ((error = vflush(mp, 0, flags)) != 0) 139 return (error); 140 141 exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); 142 143 free(mp->mnt_data, M_UFSMNT); 144 mp->mnt_data = 0; 145 146 return (0); 147 } 148 149 int 150 procfs_root(mp, vpp) 151 struct mount *mp; 152 struct vnode **vpp; 153 { 154 155 return (procfs_allocvp(mp, vpp, 0, Proot)); 156 } 157 158 /* ARGSUSED */ 159 int 160 procfs_start(mp, flags, p) 161 struct mount *mp; 162 int flags; 163 struct proc *p; 164 { 165 166 return (0); 167 } 168 169 /* 170 * Get file system statistics. 171 */ 172 int 173 procfs_statfs(mp, sbp, p) 174 struct mount *mp; 175 struct statfs *sbp; 176 struct proc *p; 177 { 178 179 sbp->f_bsize = PAGE_SIZE; 180 sbp->f_iosize = PAGE_SIZE; 181 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 182 sbp->f_bfree = 0; 183 sbp->f_bavail = 0; 184 sbp->f_files = maxproc; /* approx */ 185 sbp->f_ffree = maxproc - nprocs; /* approx */ 186 #ifdef COMPAT_09 187 sbp->f_type = 10; 188 #else 189 sbp->f_type = 0; 190 #endif 191 if (sbp != &mp->mnt_stat) { 192 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 193 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 194 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 195 } 196 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 197 return (0); 198 } 199 200 /*ARGSUSED*/ 201 int 202 procfs_quotactl(mp, cmds, uid, arg, p) 203 struct mount *mp; 204 int cmds; 205 uid_t uid; 206 caddr_t arg; 207 struct proc *p; 208 { 209 210 return (EOPNOTSUPP); 211 } 212 213 /*ARGSUSED*/ 214 int 215 procfs_sync(mp, waitfor, uc, p) 216 struct mount *mp; 217 int waitfor; 218 struct ucred *uc; 219 struct proc *p; 220 { 221 222 return (0); 223 } 224 225 /*ARGSUSED*/ 226 int 227 procfs_vget(mp, ino, vpp) 228 struct mount *mp; 229 ino_t ino; 230 struct vnode **vpp; 231 { 232 233 return (EOPNOTSUPP); 234 } 235 236 /*ARGSUSED*/ 237 int 238 procfs_fhtovp(mp, fhp, vpp) 239 struct mount *mp; 240 struct fid *fhp; 241 struct vnode **vpp; 242 { 243 244 return (EINVAL); 245 } 246 247 /*ARGSUSED*/ 248 int 249 procfs_checkexp(mp, mb, what, anon) 250 struct mount *mp; 251 struct mbuf *mb; 252 int *what; 253 struct ucred **anon; 254 { 255 256 return (EINVAL); 257 } 258 259 /*ARGSUSED*/ 260 int 261 procfs_vptofh(vp, fhp) 262 struct vnode *vp; 263 struct fid *fhp; 264 { 265 266 return (EINVAL); 267 } 268 269 void 270 procfs_init() 271 { 272 procfs_hashinit(); 273 } 274 275 int 276 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 277 int *name; 278 u_int namelen; 279 void *oldp; 280 size_t *oldlenp; 281 void *newp; 282 size_t newlen; 283 struct proc *p; 284 { 285 return (EOPNOTSUPP); 286 } 287 288 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 289 290 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 291 &procfs_vnodeop_opv_desc, 292 NULL, 293 }; 294 295 struct vfsops procfs_vfsops = { 296 MOUNT_PROCFS, 297 procfs_mount, 298 procfs_start, 299 procfs_unmount, 300 procfs_root, 301 procfs_quotactl, 302 procfs_statfs, 303 procfs_sync, 304 procfs_vget, 305 procfs_fhtovp, 306 procfs_vptofh, 307 procfs_init, 308 procfs_sysctl, 309 NULL, /* vfs_mountroot */ 310 procfs_checkexp, 311 procfs_vnodeopv_descs, 312 }; 313
Indexes created Mon Sep 29 21:09:56 GMT 2025