procfs_vfsops.c revision 1.34.2.1
1 /* $NetBSD: procfs_vfsops.c,v 1.34.2.1 2001/03/30 21:49:49 he 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 void procfs_done __P((void)); 66 int procfs_mount __P((struct mount *, const char *, void *, 67 struct nameidata *, struct proc *)); 68 int procfs_start __P((struct mount *, int, struct proc *)); 69 int procfs_unmount __P((struct mount *, int, struct proc *)); 70 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 71 struct proc *)); 72 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 73 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 74 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 75 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 76 int procfs_checkexp __P((struct mount *, struct mbuf *, int *, 77 struct ucred **)); 78 int procfs_vptofh __P((struct vnode *, struct fid *)); 79 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 80 struct proc *)); 81 /* 82 * VFS Operations. 83 * 84 * mount system call 85 */ 86 /* ARGSUSED */ 87 int 88 procfs_mount(mp, path, data, ndp, p) 89 struct mount *mp; 90 const char *path; 91 void *data; 92 struct nameidata *ndp; 93 struct proc *p; 94 { 95 size_t size; 96 struct procfsmount *pmnt; 97 struct procfs_args args; 98 int error; 99 100 if (UIO_MX & (UIO_MX-1)) { 101 log(LOG_ERR, "procfs: invalid directory entry size"); 102 return (EINVAL); 103 } 104 105 if (mp->mnt_flag & MNT_UPDATE) 106 return (EOPNOTSUPP); 107 108 if (data != NULL) { 109 error = copyin(data, &args, sizeof args); 110 if (error != 0) 111 return error; 112 113 if (args.version != PROCFS_ARGSVERSION) 114 return EINVAL; 115 } else 116 args.flags = 0; 117 118 mp->mnt_flag |= MNT_LOCAL; 119 pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), 120 M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ 121 122 mp->mnt_data = (qaddr_t)pmnt; 123 vfs_getnewfsid(mp); 124 125 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 126 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 127 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 128 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 129 130 pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); 131 pmnt->pmnt_mp = mp; 132 pmnt->pmnt_flags = args.flags; 133 134 return (0); 135 } 136 137 /* 138 * unmount system call 139 */ 140 int 141 procfs_unmount(mp, mntflags, p) 142 struct mount *mp; 143 int mntflags; 144 struct proc *p; 145 { 146 int error; 147 int flags = 0; 148 149 if (mntflags & MNT_FORCE) 150 flags |= FORCECLOSE; 151 152 if ((error = vflush(mp, 0, flags)) != 0) 153 return (error); 154 155 exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); 156 157 free(mp->mnt_data, M_UFSMNT); 158 mp->mnt_data = 0; 159 160 return (0); 161 } 162 163 int 164 procfs_root(mp, vpp) 165 struct mount *mp; 166 struct vnode **vpp; 167 { 168 169 return (procfs_allocvp(mp, vpp, 0, Proot)); 170 } 171 172 /* ARGSUSED */ 173 int 174 procfs_start(mp, flags, p) 175 struct mount *mp; 176 int flags; 177 struct proc *p; 178 { 179 180 return (0); 181 } 182 183 /* 184 * Get file system statistics. 185 */ 186 int 187 procfs_statfs(mp, sbp, p) 188 struct mount *mp; 189 struct statfs *sbp; 190 struct proc *p; 191 { 192 193 sbp->f_bsize = PAGE_SIZE; 194 sbp->f_iosize = PAGE_SIZE; 195 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 196 sbp->f_bfree = 0; 197 sbp->f_bavail = 0; 198 sbp->f_files = maxproc; /* approx */ 199 sbp->f_ffree = maxproc - nprocs; /* approx */ 200 #ifdef COMPAT_09 201 sbp->f_type = 10; 202 #else 203 sbp->f_type = 0; 204 #endif 205 if (sbp != &mp->mnt_stat) { 206 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 207 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 208 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 209 } 210 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 211 return (0); 212 } 213 214 /*ARGSUSED*/ 215 int 216 procfs_quotactl(mp, cmds, uid, arg, p) 217 struct mount *mp; 218 int cmds; 219 uid_t uid; 220 caddr_t arg; 221 struct proc *p; 222 { 223 224 return (EOPNOTSUPP); 225 } 226 227 /*ARGSUSED*/ 228 int 229 procfs_sync(mp, waitfor, uc, p) 230 struct mount *mp; 231 int waitfor; 232 struct ucred *uc; 233 struct proc *p; 234 { 235 236 return (0); 237 } 238 239 /*ARGSUSED*/ 240 int 241 procfs_vget(mp, ino, vpp) 242 struct mount *mp; 243 ino_t ino; 244 struct vnode **vpp; 245 { 246 247 return (EOPNOTSUPP); 248 } 249 250 /*ARGSUSED*/ 251 int 252 procfs_fhtovp(mp, fhp, vpp) 253 struct mount *mp; 254 struct fid *fhp; 255 struct vnode **vpp; 256 { 257 258 return (EINVAL); 259 } 260 261 /*ARGSUSED*/ 262 int 263 procfs_checkexp(mp, mb, what, anon) 264 struct mount *mp; 265 struct mbuf *mb; 266 int *what; 267 struct ucred **anon; 268 { 269 270 return (EINVAL); 271 } 272 273 /*ARGSUSED*/ 274 int 275 procfs_vptofh(vp, fhp) 276 struct vnode *vp; 277 struct fid *fhp; 278 { 279 280 return (EINVAL); 281 } 282 283 void 284 procfs_init() 285 { 286 procfs_hashinit(); 287 } 288 289 void 290 procfs_done() 291 { 292 procfs_hashdone(); 293 } 294 295 int 296 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 297 int *name; 298 u_int namelen; 299 void *oldp; 300 size_t *oldlenp; 301 void *newp; 302 size_t newlen; 303 struct proc *p; 304 { 305 return (EOPNOTSUPP); 306 } 307 308 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 309 310 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 311 &procfs_vnodeop_opv_desc, 312 NULL, 313 }; 314 315 struct vfsops procfs_vfsops = { 316 MOUNT_PROCFS, 317 procfs_mount, 318 procfs_start, 319 procfs_unmount, 320 procfs_root, 321 procfs_quotactl, 322 procfs_statfs, 323 procfs_sync, 324 procfs_vget, 325 procfs_fhtovp, 326 procfs_vptofh, 327 procfs_init, 328 procfs_done, 329 procfs_sysctl, 330 NULL, /* vfs_mountroot */ 331 procfs_checkexp, 332 procfs_vnodeopv_descs, 333 }; 334
Indexes created Mon Sep 29 13:09:55 GMT 2025