procfs_vfsops.c revision 1.38.2.1
1 /* $NetBSD: procfs_vfsops.c,v 1.38.2.1 2001/06/21 20:07:44 nathanw 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_OPT) 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 62 #include <miscfs/procfs/procfs.h> 63 64 #include <uvm/uvm_extern.h> /* for PAGE_SIZE */ 65 66 void procfs_init __P((void)); 67 void procfs_done __P((void)); 68 int procfs_mount __P((struct mount *, const char *, void *, 69 struct nameidata *, struct proc *)); 70 int procfs_start __P((struct mount *, int, struct proc *)); 71 int procfs_unmount __P((struct mount *, int, struct proc *)); 72 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 73 struct proc *)); 74 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 75 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 76 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 77 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 78 int procfs_checkexp __P((struct mount *, struct mbuf *, int *, 79 struct ucred **)); 80 int procfs_vptofh __P((struct vnode *, struct fid *)); 81 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 82 struct proc *)); 83 /* 84 * VFS Operations. 85 * 86 * mount system call 87 */ 88 /* ARGSUSED */ 89 int 90 procfs_mount(mp, path, data, ndp, p) 91 struct mount *mp; 92 const char *path; 93 void *data; 94 struct nameidata *ndp; 95 struct proc *p; 96 { 97 size_t size; 98 struct procfsmount *pmnt; 99 struct procfs_args args; 100 int error; 101 102 if (UIO_MX & (UIO_MX-1)) { 103 log(LOG_ERR, "procfs: invalid directory entry size"); 104 return (EINVAL); 105 } 106 107 if (mp->mnt_flag & MNT_UPDATE) 108 return (EOPNOTSUPP); 109 110 if (data != NULL) { 111 error = copyin(data, &args, sizeof args); 112 if (error != 0) 113 return error; 114 115 if (args.version != PROCFS_ARGSVERSION) 116 return EINVAL; 117 } else 118 args.flags = 0; 119 120 mp->mnt_flag |= MNT_LOCAL; 121 pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), 122 M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ 123 124 mp->mnt_data = (qaddr_t)pmnt; 125 vfs_getnewfsid(mp); 126 127 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 128 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 129 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 130 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 131 132 pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); 133 pmnt->pmnt_flags = args.flags; 134 135 return (0); 136 } 137 138 /* 139 * unmount system call 140 */ 141 int 142 procfs_unmount(mp, mntflags, p) 143 struct mount *mp; 144 int mntflags; 145 struct proc *p; 146 { 147 int error; 148 int flags = 0; 149 150 if (mntflags & MNT_FORCE) 151 flags |= FORCECLOSE; 152 153 if ((error = vflush(mp, 0, flags)) != 0) 154 return (error); 155 156 exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); 157 158 free(mp->mnt_data, M_UFSMNT); 159 mp->mnt_data = 0; 160 161 return (0); 162 } 163 164 int 165 procfs_root(mp, vpp) 166 struct mount *mp; 167 struct vnode **vpp; 168 { 169 170 return (procfs_allocvp(mp, vpp, 0, Proot)); 171 } 172 173 /* ARGSUSED */ 174 int 175 procfs_start(mp, flags, p) 176 struct mount *mp; 177 int flags; 178 struct proc *p; 179 { 180 181 return (0); 182 } 183 184 /* 185 * Get file system statistics. 186 */ 187 int 188 procfs_statfs(mp, sbp, p) 189 struct mount *mp; 190 struct statfs *sbp; 191 struct proc *p; 192 { 193 194 sbp->f_bsize = PAGE_SIZE; 195 sbp->f_iosize = PAGE_SIZE; 196 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 197 sbp->f_bfree = 0; 198 sbp->f_bavail = 0; 199 sbp->f_files = maxproc; /* approx */ 200 sbp->f_ffree = maxproc - nprocs; /* approx */ 201 #ifdef COMPAT_09 202 sbp->f_type = 10; 203 #else 204 sbp->f_type = 0; 205 #endif 206 if (sbp != &mp->mnt_stat) { 207 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 208 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 209 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 210 } 211 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 212 return (0); 213 } 214 215 /*ARGSUSED*/ 216 int 217 procfs_quotactl(mp, cmds, uid, arg, p) 218 struct mount *mp; 219 int cmds; 220 uid_t uid; 221 caddr_t arg; 222 struct proc *p; 223 { 224 225 return (EOPNOTSUPP); 226 } 227 228 /*ARGSUSED*/ 229 int 230 procfs_sync(mp, waitfor, uc, p) 231 struct mount *mp; 232 int waitfor; 233 struct ucred *uc; 234 struct proc *p; 235 { 236 237 return (0); 238 } 239 240 /*ARGSUSED*/ 241 int 242 procfs_vget(mp, ino, vpp) 243 struct mount *mp; 244 ino_t ino; 245 struct vnode **vpp; 246 { 247 248 return (EOPNOTSUPP); 249 } 250 251 /*ARGSUSED*/ 252 int 253 procfs_fhtovp(mp, fhp, vpp) 254 struct mount *mp; 255 struct fid *fhp; 256 struct vnode **vpp; 257 { 258 259 return (EINVAL); 260 } 261 262 /*ARGSUSED*/ 263 int 264 procfs_checkexp(mp, mb, what, anon) 265 struct mount *mp; 266 struct mbuf *mb; 267 int *what; 268 struct ucred **anon; 269 { 270 271 return (EINVAL); 272 } 273 274 /*ARGSUSED*/ 275 int 276 procfs_vptofh(vp, fhp) 277 struct vnode *vp; 278 struct fid *fhp; 279 { 280 281 return (EINVAL); 282 } 283 284 void 285 procfs_init() 286 { 287 procfs_hashinit(); 288 } 289 290 void 291 procfs_done() 292 { 293 procfs_hashdone(); 294 } 295 296 int 297 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 298 int *name; 299 u_int namelen; 300 void *oldp; 301 size_t *oldlenp; 302 void *newp; 303 size_t newlen; 304 struct proc *p; 305 { 306 return (EOPNOTSUPP); 307 } 308 309 extern const struct vnodeopv_desc procfs_vnodeop_opv_desc; 310 311 const struct vnodeopv_desc * const procfs_vnodeopv_descs[] = { 312 &procfs_vnodeop_opv_desc, 313 NULL, 314 }; 315 316 struct vfsops procfs_vfsops = { 317 MOUNT_PROCFS, 318 procfs_mount, 319 procfs_start, 320 procfs_unmount, 321 procfs_root, 322 procfs_quotactl, 323 procfs_statfs, 324 procfs_sync, 325 procfs_vget, 326 procfs_fhtovp, 327 procfs_vptofh, 328 procfs_init, 329 procfs_done, 330 procfs_sysctl, 331 NULL, /* vfs_mountroot */ 332 procfs_checkexp, 333 procfs_vnodeopv_descs, 334 }; 335
Indexes created Mon Sep 29 21:09:56 GMT 2025