procfs_vfsops.c revision 1.46
1 /* $NetBSD: procfs_vfsops.c,v 1.46 2003/06/28 14:22:04 darrenr 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 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: procfs_vfsops.c,v 1.46 2003/06/28 14:22:04 darrenr Exp $"); 48 49 #if defined(_KERNEL_OPT) 50 #include "opt_compat_netbsd.h" 51 #endif 52 53 #include <sys/param.h> 54 #include <sys/time.h> 55 #include <sys/kernel.h> 56 #include <sys/systm.h> 57 #include <sys/proc.h> 58 #include <sys/buf.h> 59 #include <sys/syslog.h> 60 #include <sys/mount.h> 61 #include <sys/signalvar.h> 62 #include <sys/vnode.h> 63 #include <sys/malloc.h> 64 65 #include <miscfs/procfs/procfs.h> 66 67 #include <uvm/uvm_extern.h> /* for PAGE_SIZE */ 68 69 void procfs_init __P((void)); 70 void procfs_reinit __P((void)); 71 void procfs_done __P((void)); 72 int procfs_mount __P((struct mount *, const char *, void *, 73 struct nameidata *, struct lwp *)); 74 int procfs_start __P((struct mount *, int, struct lwp *)); 75 int procfs_unmount __P((struct mount *, int, struct lwp *)); 76 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 77 struct lwp *)); 78 int procfs_statfs __P((struct mount *, struct statfs *, struct lwp *)); 79 int procfs_sync __P((struct mount *, int, struct ucred *, struct lwp *)); 80 int procfs_vget __P((struct mount *, ino_t, struct vnode **, struct lwp *)); 81 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **, struct lwp *)); 82 int procfs_checkexp __P((struct mount *, struct mbuf *, int *, 83 struct ucred **)); 84 int procfs_vptofh __P((struct vnode *, struct fid *)); 85 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 86 struct lwp *)); 87 /* 88 * VFS Operations. 89 * 90 * mount system call 91 */ 92 /* ARGSUSED */ 93 int 94 procfs_mount(mp, path, data, ndp, l) 95 struct mount *mp; 96 const char *path; 97 void *data; 98 struct nameidata *ndp; 99 struct lwp *l; 100 { 101 struct procfsmount *pmnt; 102 struct procfs_args args; 103 int error; 104 105 if (UIO_MX & (UIO_MX-1)) { 106 log(LOG_ERR, "procfs: invalid directory entry size"); 107 return (EINVAL); 108 } 109 110 if (mp->mnt_flag & MNT_GETARGS) { 111 pmnt = VFSTOPROC(mp); 112 if (pmnt == NULL) 113 return EIO; 114 args.version = PROCFS_ARGSVERSION; 115 args.flags = pmnt->pmnt_flags; 116 return copyout(&args, data, sizeof(args)); 117 } 118 119 if (mp->mnt_flag & MNT_UPDATE) 120 return (EOPNOTSUPP); 121 122 if (data != NULL) { 123 error = copyin(data, &args, sizeof args); 124 if (error != 0) 125 return error; 126 127 if (args.version != PROCFS_ARGSVERSION) 128 return EINVAL; 129 } else 130 args.flags = 0; 131 132 mp->mnt_flag |= MNT_LOCAL; 133 pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), 134 M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ 135 136 mp->mnt_data = pmnt; 137 vfs_getnewfsid(mp); 138 139 error = set_statfs_info(path, UIO_USERSPACE, "procfs", UIO_SYSSPACE, 140 mp, l); 141 pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); 142 pmnt->pmnt_flags = args.flags; 143 144 return error; 145 } 146 147 /* 148 * unmount system call 149 */ 150 int 151 procfs_unmount(mp, mntflags, l) 152 struct mount *mp; 153 int mntflags; 154 struct lwp *l; 155 { 156 int error; 157 int flags = 0; 158 159 if (mntflags & MNT_FORCE) 160 flags |= FORCECLOSE; 161 162 if ((error = vflush(mp, 0, flags)) != 0) 163 return (error); 164 165 exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); 166 167 free(mp->mnt_data, M_UFSMNT); 168 mp->mnt_data = 0; 169 170 return (0); 171 } 172 173 int 174 procfs_root(mp, vpp, l) 175 struct mount *mp; 176 struct vnode **vpp; 177 struct lwp *l; 178 { 179 180 return (procfs_allocvp(mp, vpp, 0, Proot, -1)); 181 } 182 183 /* ARGSUSED */ 184 int 185 procfs_start(mp, flags, l) 186 struct mount *mp; 187 int flags; 188 struct lwp *l; 189 { 190 191 return (0); 192 } 193 194 /* 195 * Get file system statistics. 196 */ 197 int 198 procfs_statfs(mp, sbp, l) 199 struct mount *mp; 200 struct statfs *sbp; 201 struct lwp *l; 202 { 203 204 sbp->f_bsize = PAGE_SIZE; 205 sbp->f_iosize = PAGE_SIZE; 206 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 207 sbp->f_bfree = 0; 208 sbp->f_bavail = 0; 209 sbp->f_files = maxproc; /* approx */ 210 sbp->f_ffree = maxproc - nprocs; /* approx */ 211 #ifdef COMPAT_09 212 sbp->f_type = 10; 213 #else 214 sbp->f_type = 0; 215 #endif 216 copy_statfs_info(sbp, mp); 217 return (0); 218 } 219 220 /*ARGSUSED*/ 221 int 222 procfs_quotactl(mp, cmds, uid, arg, l) 223 struct mount *mp; 224 int cmds; 225 uid_t uid; 226 caddr_t arg; 227 struct lwp *l; 228 { 229 230 return (EOPNOTSUPP); 231 } 232 233 /*ARGSUSED*/ 234 int 235 procfs_sync(mp, waitfor, uc, l) 236 struct mount *mp; 237 int waitfor; 238 struct ucred *uc; 239 struct lwp *l; 240 { 241 242 return (0); 243 } 244 245 /*ARGSUSED*/ 246 int 247 procfs_vget(mp, ino, vpp, l) 248 struct mount *mp; 249 ino_t ino; 250 struct vnode **vpp; 251 struct lwp *l; 252 { 253 return (EOPNOTSUPP); 254 } 255 256 /*ARGSUSED*/ 257 int 258 procfs_fhtovp(mp, fhp, vpp, l) 259 struct mount *mp; 260 struct fid *fhp; 261 struct vnode **vpp; 262 struct lwp *l; 263 { 264 265 return (EINVAL); 266 } 267 268 /*ARGSUSED*/ 269 int 270 procfs_checkexp(mp, mb, what, anon) 271 struct mount *mp; 272 struct mbuf *mb; 273 int *what; 274 struct ucred **anon; 275 { 276 277 return (EINVAL); 278 } 279 280 /*ARGSUSED*/ 281 int 282 procfs_vptofh(vp, fhp) 283 struct vnode *vp; 284 struct fid *fhp; 285 { 286 287 return (EINVAL); 288 } 289 290 void 291 procfs_init() 292 { 293 procfs_hashinit(); 294 } 295 296 void 297 procfs_reinit() 298 { 299 procfs_hashreinit(); 300 } 301 302 void 303 procfs_done() 304 { 305 procfs_hashdone(); 306 } 307 308 int 309 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, l) 310 int *name; 311 u_int namelen; 312 void *oldp; 313 size_t *oldlenp; 314 void *newp; 315 size_t newlen; 316 struct lwp *l; 317 { 318 return (EOPNOTSUPP); 319 } 320 321 extern const struct vnodeopv_desc procfs_vnodeop_opv_desc; 322 323 const struct vnodeopv_desc * const procfs_vnodeopv_descs[] = { 324 &procfs_vnodeop_opv_desc, 325 NULL, 326 }; 327 328 struct vfsops procfs_vfsops = { 329 MOUNT_PROCFS, 330 procfs_mount, 331 procfs_start, 332 procfs_unmount, 333 procfs_root, 334 procfs_quotactl, 335 procfs_statfs, 336 procfs_sync, 337 procfs_vget, 338 procfs_fhtovp, 339 procfs_vptofh, 340 procfs_init, 341 procfs_reinit, 342 procfs_done, 343 procfs_sysctl, 344 NULL, /* vfs_mountroot */ 345 procfs_checkexp, 346 procfs_vnodeopv_descs, 347 }; 348
Indexes created Mon Sep 29 21:09:56 GMT 2025