procfs_vfsops.c revision 1.35
1 /* $NetBSD: procfs_vfsops.c,v 1.35 2000/06/28 02:44:07 mrg 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 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; 99 100 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 mp->mnt_flag |= MNT_LOCAL; 109 pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), 110 M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ 111 112 mp->mnt_data = (qaddr_t)pmnt; 113 vfs_getnewfsid(mp); 114 115 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 116 memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); 117 memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); 118 memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs")); 119 120 pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); 121 pmnt->pmnt_mp = mp; 122 123 return (0); 124 } 125 126 /* 127 * unmount system call 128 */ 129 int 130 procfs_unmount(mp, mntflags, p) 131 struct mount *mp; 132 int mntflags; 133 struct proc *p; 134 { 135 int error; 136 int flags = 0; 137 138 if (mntflags & MNT_FORCE) 139 flags |= FORCECLOSE; 140 141 if ((error = vflush(mp, 0, flags)) != 0) 142 return (error); 143 144 exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); 145 146 free(mp->mnt_data, M_UFSMNT); 147 mp->mnt_data = 0; 148 149 return (0); 150 } 151 152 int 153 procfs_root(mp, vpp) 154 struct mount *mp; 155 struct vnode **vpp; 156 { 157 158 return (procfs_allocvp(mp, vpp, 0, Proot)); 159 } 160 161 /* ARGSUSED */ 162 int 163 procfs_start(mp, flags, p) 164 struct mount *mp; 165 int flags; 166 struct proc *p; 167 { 168 169 return (0); 170 } 171 172 /* 173 * Get file system statistics. 174 */ 175 int 176 procfs_statfs(mp, sbp, p) 177 struct mount *mp; 178 struct statfs *sbp; 179 struct proc *p; 180 { 181 182 sbp->f_bsize = PAGE_SIZE; 183 sbp->f_iosize = PAGE_SIZE; 184 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 185 sbp->f_bfree = 0; 186 sbp->f_bavail = 0; 187 sbp->f_files = maxproc; /* approx */ 188 sbp->f_ffree = maxproc - nprocs; /* approx */ 189 #ifdef COMPAT_09 190 sbp->f_type = 10; 191 #else 192 sbp->f_type = 0; 193 #endif 194 if (sbp != &mp->mnt_stat) { 195 memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid)); 196 memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); 197 memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); 198 } 199 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 200 return (0); 201 } 202 203 /*ARGSUSED*/ 204 int 205 procfs_quotactl(mp, cmds, uid, arg, p) 206 struct mount *mp; 207 int cmds; 208 uid_t uid; 209 caddr_t arg; 210 struct proc *p; 211 { 212 213 return (EOPNOTSUPP); 214 } 215 216 /*ARGSUSED*/ 217 int 218 procfs_sync(mp, waitfor, uc, p) 219 struct mount *mp; 220 int waitfor; 221 struct ucred *uc; 222 struct proc *p; 223 { 224 225 return (0); 226 } 227 228 /*ARGSUSED*/ 229 int 230 procfs_vget(mp, ino, vpp) 231 struct mount *mp; 232 ino_t ino; 233 struct vnode **vpp; 234 { 235 236 return (EOPNOTSUPP); 237 } 238 239 /*ARGSUSED*/ 240 int 241 procfs_fhtovp(mp, fhp, vpp) 242 struct mount *mp; 243 struct fid *fhp; 244 struct vnode **vpp; 245 { 246 247 return (EINVAL); 248 } 249 250 /*ARGSUSED*/ 251 int 252 procfs_checkexp(mp, mb, what, anon) 253 struct mount *mp; 254 struct mbuf *mb; 255 int *what; 256 struct ucred **anon; 257 { 258 259 return (EINVAL); 260 } 261 262 /*ARGSUSED*/ 263 int 264 procfs_vptofh(vp, fhp) 265 struct vnode *vp; 266 struct fid *fhp; 267 { 268 269 return (EINVAL); 270 } 271 272 void 273 procfs_init() 274 { 275 procfs_hashinit(); 276 } 277 278 void 279 procfs_done() 280 { 281 procfs_hashdone(); 282 } 283 284 int 285 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 286 int *name; 287 u_int namelen; 288 void *oldp; 289 size_t *oldlenp; 290 void *newp; 291 size_t newlen; 292 struct proc *p; 293 { 294 return (EOPNOTSUPP); 295 } 296 297 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 298 299 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 300 &procfs_vnodeop_opv_desc, 301 NULL, 302 }; 303 304 struct vfsops procfs_vfsops = { 305 MOUNT_PROCFS, 306 procfs_mount, 307 procfs_start, 308 procfs_unmount, 309 procfs_root, 310 procfs_quotactl, 311 procfs_statfs, 312 procfs_sync, 313 procfs_vget, 314 procfs_fhtovp, 315 procfs_vptofh, 316 procfs_init, 317 procfs_done, 318 procfs_sysctl, 319 NULL, /* vfs_mountroot */ 320 procfs_checkexp, 321 procfs_vnodeopv_descs, 322 }; 323
Indexes created Mon Sep 29 21:09:56 GMT 2025