procfs_vfsops.c revision 1.28
1 /* $NetBSD: procfs_vfsops.c,v 1.28 1998/03/01 02:21:16 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/param.h> 47 #include <sys/time.h> 48 #include <sys/kernel.h> 49 #include <sys/systm.h> 50 #include <sys/proc.h> 51 #include <sys/buf.h> 52 #include <sys/syslog.h> 53 #include <sys/mount.h> 54 #include <sys/signalvar.h> 55 #include <sys/vnode.h> 56 #include <miscfs/procfs/procfs.h> 57 #include <vm/vm.h> /* for PAGE_SIZE */ 58 59 void procfs_init __P((void)); 60 int procfs_mount __P((struct mount *, const char *, void *, 61 struct nameidata *, struct proc *)); 62 int procfs_start __P((struct mount *, int, struct proc *)); 63 int procfs_unmount __P((struct mount *, int, struct proc *)); 64 int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 65 struct proc *)); 66 int procfs_statfs __P((struct mount *, struct statfs *, struct proc *)); 67 int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); 68 int procfs_vget __P((struct mount *, ino_t, struct vnode **)); 69 int procfs_fhtovp __P((struct mount *, struct fid *, struct mbuf *, 70 struct vnode **, int *, struct ucred **)); 71 int procfs_vptofh __P((struct vnode *, struct fid *)); 72 int procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t, 73 struct proc *)); 74 /* 75 * VFS Operations. 76 * 77 * mount system call 78 */ 79 /* ARGSUSED */ 80 int 81 procfs_mount(mp, path, data, ndp, p) 82 struct mount *mp; 83 const char *path; 84 void *data; 85 struct nameidata *ndp; 86 struct proc *p; 87 { 88 size_t size; 89 90 if (UIO_MX & (UIO_MX-1)) { 91 log(LOG_ERR, "procfs: invalid directory entry size"); 92 return (EINVAL); 93 } 94 95 if (mp->mnt_flag & MNT_UPDATE) 96 return (EOPNOTSUPP); 97 98 mp->mnt_flag |= MNT_LOCAL; 99 mp->mnt_data = 0; 100 vfs_getnewfsid(mp, MOUNT_PROCFS); 101 102 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size); 103 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 104 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); 105 bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs")); 106 return (0); 107 } 108 109 /* 110 * unmount system call 111 */ 112 int 113 procfs_unmount(mp, mntflags, p) 114 struct mount *mp; 115 int mntflags; 116 struct proc *p; 117 { 118 int error; 119 int flags = 0; 120 121 if (mntflags & MNT_FORCE) 122 flags |= FORCECLOSE; 123 124 if ((error = vflush(mp, 0, flags)) != 0) 125 return (error); 126 127 return (0); 128 } 129 130 int 131 procfs_root(mp, vpp) 132 struct mount *mp; 133 struct vnode **vpp; 134 { 135 136 return (procfs_allocvp(mp, vpp, 0, Proot)); 137 } 138 139 /* ARGSUSED */ 140 int 141 procfs_start(mp, flags, p) 142 struct mount *mp; 143 int flags; 144 struct proc *p; 145 { 146 147 return (0); 148 } 149 150 /* 151 * Get file system statistics. 152 */ 153 int 154 procfs_statfs(mp, sbp, p) 155 struct mount *mp; 156 struct statfs *sbp; 157 struct proc *p; 158 { 159 160 sbp->f_bsize = PAGE_SIZE; 161 sbp->f_iosize = PAGE_SIZE; 162 sbp->f_blocks = 1; /* avoid divide by zero in some df's */ 163 sbp->f_bfree = 0; 164 sbp->f_bavail = 0; 165 sbp->f_files = maxproc; /* approx */ 166 sbp->f_ffree = maxproc - nprocs; /* approx */ 167 #ifdef COMPAT_09 168 sbp->f_type = 10; 169 #else 170 sbp->f_type = 0; 171 #endif 172 if (sbp != &mp->mnt_stat) { 173 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); 174 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 175 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 176 } 177 strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 178 return (0); 179 } 180 181 /*ARGSUSED*/ 182 int 183 procfs_quotactl(mp, cmds, uid, arg, p) 184 struct mount *mp; 185 int cmds; 186 uid_t uid; 187 caddr_t arg; 188 struct proc *p; 189 { 190 191 return (EOPNOTSUPP); 192 } 193 194 /*ARGSUSED*/ 195 int 196 procfs_sync(mp, waitfor, uc, p) 197 struct mount *mp; 198 int waitfor; 199 struct ucred *uc; 200 struct proc *p; 201 { 202 203 return (0); 204 } 205 206 /*ARGSUSED*/ 207 int 208 procfs_vget(mp, ino, vpp) 209 struct mount *mp; 210 ino_t ino; 211 struct vnode **vpp; 212 { 213 214 return (EOPNOTSUPP); 215 } 216 217 /*ARGSUSED*/ 218 int 219 procfs_fhtovp(mp, fhp, mb, vpp, what, anon) 220 struct mount *mp; 221 struct fid *fhp; 222 struct mbuf *mb; 223 struct vnode **vpp; 224 int *what; 225 struct ucred **anon; 226 { 227 228 return (EINVAL); 229 } 230 231 /*ARGSUSED*/ 232 int 233 procfs_vptofh(vp, fhp) 234 struct vnode *vp; 235 struct fid *fhp; 236 { 237 238 return (EINVAL); 239 } 240 241 void 242 procfs_init() 243 { 244 } 245 246 int 247 procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 248 int *name; 249 u_int namelen; 250 void *oldp; 251 size_t *oldlenp; 252 void *newp; 253 size_t newlen; 254 struct proc *p; 255 { 256 return (EOPNOTSUPP); 257 } 258 259 extern struct vnodeopv_desc procfs_vnodeop_opv_desc; 260 261 struct vnodeopv_desc *procfs_vnodeopv_descs[] = { 262 &procfs_vnodeop_opv_desc, 263 NULL, 264 }; 265 266 struct vfsops procfs_vfsops = { 267 MOUNT_PROCFS, 268 procfs_mount, 269 procfs_start, 270 procfs_unmount, 271 procfs_root, 272 procfs_quotactl, 273 procfs_statfs, 274 procfs_sync, 275 procfs_vget, 276 procfs_fhtovp, 277 procfs_vptofh, 278 procfs_init, 279 procfs_sysctl, 280 NULL, /* vfs_mountroot */ 281 procfs_vnodeopv_descs, 282 }; 283
Indexes created Tue Sep 30 07:10:03 GMT 2025