procfs_vfsops.c revision 1.48
1 /* $NetBSD: procfs_vfsops.c,v 1.48 2003/06/29 22:31:47 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 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: procfs_vfsops.c,v 1.48 2003/06/29 22:31:47 fvdl 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 proc *)); 74 int procfs_start __P((struct mount *, int, struct proc *)); 75 int procfs_unmount __P((struct mount *, int, struct proc *)); 76 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 77 struct proc *)); 78 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 79 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 80 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 81 int procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **)); 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 proc *)); 87 /* 88 * VFS Operations. 89 * 90 * mount system call 91 */ 92 /* ARGSUSED */ 93 int 94 procfs_mount(mp, path, data, ndp, p) 95 struct mount *mp; 96 const char *path; 97 void *data; 98 struct nameidata *ndp; 99 struct proc *p; 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, p); 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, p) 152 struct mount *mp; 153 int mntflags; 154 struct proc *p; 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) 175 struct mount *mp; 176 struct vnode **vpp; 177 { 178 179 return (procfs_allocvp(mp, vpp, 0, Proot, -1)); 180 } 181 182 /* ARGSUSED */ 183 int 184 procfs_start(mp, flags, p) 185 struct mount *mp; 186 int flags; 187 struct proc *p; 188 { 189 190 return (0); 191 } 192 193 /* 194 * Get file system statistics. 195 */ 196 int 197 procfs_statfs(mp, sbp, p) 198 struct mount *mp; 199 struct statfs *sbp; 200 struct proc *p; 201 { 202 203 sbp->f_bsize = PAGE_SIZE; 204 sbp->f_iosize = PAGE_SIZE; 205 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 206 sbp->f_bfree = 0; 207 sbp->f_bavail = 0; 208 sbp->f_files = maxproc; /* approx */ 209 sbp->f_ffree = maxproc - nprocs; /* approx */ 210 #ifdef COMPAT_09 211 sbp->f_type = 10; 212 #else 213 sbp->f_type = 0; 214 #endif 215 copy_statfs_info(sbp, mp); 216 return (0); 217 } 218 219 /*ARGSUSED*/ 220 int 221 procfs_quotactl(mp, cmds, uid, arg, p) 222 struct mount *mp; 223 int cmds; 224 uid_t uid; 225 caddr_t arg; 226 struct proc *p; 227 { 228 229 return (EOPNOTSUPP); 230 } 231 232 /*ARGSUSED*/ 233 int 234 procfs_sync(mp, waitfor, uc, p) 235 struct mount *mp; 236 int waitfor; 237 struct ucred *uc; 238 struct proc *p; 239 { 240 241 return (0); 242 } 243 244 /*ARGSUSED*/ 245 int 246 procfs_vget(mp, ino, vpp) 247 struct mount *mp; 248 ino_t ino; 249 struct vnode **vpp; 250 { 251 return (EOPNOTSUPP); 252 } 253 254 /*ARGSUSED*/ 255 int 256 procfs_fhtovp(mp, fhp, vpp) 257 struct mount *mp; 258 struct fid *fhp; 259 struct vnode **vpp; 260 { 261 262 return (EINVAL); 263 } 264 265 /*ARGSUSED*/ 266 int 267 procfs_checkexp(mp, mb, what, anon) 268 struct mount *mp; 269 struct mbuf *mb; 270 int *what; 271 struct ucred **anon; 272 { 273 274 return (EINVAL); 275 } 276 277 /*ARGSUSED*/ 278 int 279 procfs_vptofh(vp, fhp) 280 struct vnode *vp; 281 struct fid *fhp; 282 { 283 284 return (EINVAL); 285 } 286 287 void 288 procfs_init() 289 { 290 procfs_hashinit(); 291 } 292 293 void 294 procfs_reinit() 295 { 296 procfs_hashreinit(); 297 } 298 299 void 300 procfs_done() 301 { 302 procfs_hashdone(); 303 } 304 305 int 306 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 307 int *name; 308 u_int namelen; 309 void *oldp; 310 size_t *oldlenp; 311 void *newp; 312 size_t newlen; 313 struct proc *p; 314 { 315 return (EOPNOTSUPP); 316 } 317 318 extern const struct vnodeopv_desc procfs_vnodeop_opv_desc; 319 320 const struct vnodeopv_desc * const procfs_vnodeopv_descs[] = { 321 &procfs_vnodeop_opv_desc, 322 NULL, 323 }; 324 325 struct vfsops procfs_vfsops = { 326 MOUNT_PROCFS, 327 procfs_mount, 328 procfs_start, 329 procfs_unmount, 330 procfs_root, 331 procfs_quotactl, 332 procfs_statfs, 333 procfs_sync, 334 procfs_vget, 335 procfs_fhtovp, 336 procfs_vptofh, 337 procfs_init, 338 procfs_reinit, 339 procfs_done, 340 procfs_sysctl, 341 NULL, /* vfs_mountroot */ 342 procfs_checkexp, 343 procfs_vnodeopv_descs, 344 }; 345
Indexes created Mon Sep 29 21:09:56 GMT 2025