1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93 |
34 * $Id: dead_vnops.c,v 1.9 1995/11/11 03:36:07 bde Exp $ |
35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/proc.h> 40#include <sys/time.h> 41#include <sys/kernel.h> 42#include <sys/vnode.h> 43#include <sys/errno.h> 44#include <sys/namei.h> 45#include <sys/buf.h> 46 47static int chkvnlock __P((struct vnode *)); 48/* 49 * Prototypes for dead operations on vnodes. 50 */ |
51static int dead_badop __P((void)); 52static int dead_ebadf __P((void)); 53static int dead_lookup __P((struct vop_lookup_args *)); |
54#define dead_create ((int (*) __P((struct vop_create_args *)))dead_badop) 55#define dead_mknod ((int (*) __P((struct vop_mknod_args *)))dead_badop) |
56static int dead_open __P((struct vop_open_args *)); |
57#define dead_close ((int (*) __P((struct vop_close_args *)))nullop) 58#define dead_access ((int (*) __P((struct vop_access_args *)))dead_ebadf) 59#define dead_getattr ((int (*) __P((struct vop_getattr_args *)))dead_ebadf) 60#define dead_setattr ((int (*) __P((struct vop_setattr_args *)))dead_ebadf) |
61static int dead_read __P((struct vop_read_args *)); 62static int dead_write __P((struct vop_write_args *)); 63static int dead_ioctl __P((struct vop_ioctl_args *)); 64static int dead_select __P((struct vop_select_args *)); |
65#define dead_mmap ((int (*) __P((struct vop_mmap_args *)))dead_badop) 66#define dead_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) 67#define dead_seek ((int (*) __P((struct vop_seek_args *)))nullop) 68#define dead_remove ((int (*) __P((struct vop_remove_args *)))dead_badop) 69#define dead_link ((int (*) __P((struct vop_link_args *)))dead_badop) 70#define dead_rename ((int (*) __P((struct vop_rename_args *)))dead_badop) 71#define dead_mkdir ((int (*) __P((struct vop_mkdir_args *)))dead_badop) 72#define dead_rmdir ((int (*) __P((struct vop_rmdir_args *)))dead_badop) 73#define dead_symlink ((int (*) __P((struct vop_symlink_args *)))dead_badop) 74#define dead_readdir ((int (*) __P((struct vop_readdir_args *)))dead_ebadf) 75#define dead_readlink ((int (*) __P((struct vop_readlink_args *)))dead_ebadf) 76#define dead_abortop ((int (*) __P((struct vop_abortop_args *)))dead_badop) 77#define dead_inactive ((int (*) __P((struct vop_inactive_args *)))nullop) 78#define dead_reclaim ((int (*) __P((struct vop_reclaim_args *)))nullop) |
79static int dead_lock __P((struct vop_lock_args *)); |
80#define dead_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) |
81static int dead_bmap __P((struct vop_bmap_args *)); 82static int dead_strategy __P((struct vop_strategy_args *)); 83static int dead_print __P((struct vop_print_args *)); |
84#define dead_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) 85#define dead_pathconf ((int (*) __P((struct vop_pathconf_args *)))dead_ebadf) 86#define dead_advlock ((int (*) __P((struct vop_advlock_args *)))dead_ebadf) 87#define dead_blkatoff ((int (*) __P((struct vop_blkatoff_args *)))dead_badop) 88#define dead_valloc ((int (*) __P((struct vop_valloc_args *)))dead_badop) 89#define dead_vfree ((int (*) __P((struct vop_vfree_args *)))dead_badop) 90#define dead_truncate ((int (*) __P((struct vop_truncate_args *)))nullop) 91#define dead_update ((int (*) __P((struct vop_update_args *)))nullop) 92#define dead_bwrite ((int (*) __P((struct vop_bwrite_args *)))nullop) 93 94vop_t **dead_vnodeop_p; |
95static struct vnodeopv_entry_desc dead_vnodeop_entries[] = { |
96 { &vop_default_desc, (vop_t *)vn_default_error }, 97 { &vop_lookup_desc, (vop_t *)dead_lookup }, /* lookup */ 98 { &vop_create_desc, (vop_t *)dead_create }, /* create */ 99 { &vop_mknod_desc, (vop_t *)dead_mknod }, /* mknod */ 100 { &vop_open_desc, (vop_t *)dead_open }, /* open */ 101 { &vop_close_desc, (vop_t *)dead_close }, /* close */ 102 { &vop_access_desc, (vop_t *)dead_access }, /* access */ 103 { &vop_getattr_desc, (vop_t *)dead_getattr }, /* getattr */ --- 27 unchanged lines hidden (view full) --- 131 { &vop_blkatoff_desc, (vop_t *)dead_blkatoff }, /* blkatoff */ 132 { &vop_valloc_desc, (vop_t *)dead_valloc }, /* valloc */ 133 { &vop_vfree_desc, (vop_t *)dead_vfree }, /* vfree */ 134 { &vop_truncate_desc, (vop_t *)dead_truncate }, /* truncate */ 135 { &vop_update_desc, (vop_t *)dead_update }, /* update */ 136 { &vop_bwrite_desc, (vop_t *)dead_bwrite }, /* bwrite */ 137 { NULL, NULL } 138}; |
139static struct vnodeopv_desc dead_vnodeop_opv_desc = |
140 { &dead_vnodeop_p, dead_vnodeop_entries }; 141 142VNODEOP_SET(dead_vnodeop_opv_desc); 143 144/* 145 * Trivial lookup routine that always fails. 146 */ 147/* ARGSUSED */ |
148static int |
149dead_lookup(ap) 150 struct vop_lookup_args /* { 151 struct vnode * a_dvp; 152 struct vnode ** a_vpp; 153 struct componentname * a_cnp; 154 } */ *ap; 155{ 156 157 *ap->a_vpp = NULL; 158 return (ENOTDIR); 159} 160 161/* 162 * Open always fails as if device did not exist. 163 */ 164/* ARGSUSED */ |
165static int |
166dead_open(ap) 167 struct vop_open_args /* { 168 struct vnode *a_vp; 169 int a_mode; 170 struct ucred *a_cred; 171 struct proc *a_p; 172 } */ *ap; 173{ 174 175 return (ENXIO); 176} 177 178/* 179 * Vnode op for read 180 */ 181/* ARGSUSED */ |
182static int |
183dead_read(ap) 184 struct vop_read_args /* { 185 struct vnode *a_vp; 186 struct uio *a_uio; 187 int a_ioflag; 188 struct ucred *a_cred; 189 } */ *ap; 190{ --- 7 unchanged lines hidden (view full) --- 198 return (EIO); 199 return (0); 200} 201 202/* 203 * Vnode op for write 204 */ 205/* ARGSUSED */ |
206static int |
207dead_write(ap) 208 struct vop_write_args /* { 209 struct vnode *a_vp; 210 struct uio *a_uio; 211 int a_ioflag; 212 struct ucred *a_cred; 213 } */ *ap; 214{ 215 216 if (chkvnlock(ap->a_vp)) 217 panic("dead_write: lock"); 218 return (EIO); 219} 220 221/* 222 * Device ioctl operation. 223 */ 224/* ARGSUSED */ |
225static int |
226dead_ioctl(ap) 227 struct vop_ioctl_args /* { 228 struct vnode *a_vp; 229 int a_command; 230 caddr_t a_data; 231 int a_fflag; 232 struct ucred *a_cred; 233 struct proc *a_p; 234 } */ *ap; 235{ 236 237 if (!chkvnlock(ap->a_vp)) 238 return (EBADF); 239 return (VCALL(ap->a_vp, VOFFSET(vop_ioctl), ap)); 240} 241 242/* ARGSUSED */ |
243static int |
244dead_select(ap) 245 struct vop_select_args /* { 246 struct vnode *a_vp; 247 int a_which; 248 int a_fflags; 249 struct ucred *a_cred; 250 struct proc *a_p; 251 } */ *ap; 252{ 253 254 /* 255 * Let the user find out that the descriptor is gone. 256 */ 257 return (1); 258} 259 260/* 261 * Just call the device strategy routine 262 */ |
263static int |
264dead_strategy(ap) 265 struct vop_strategy_args /* { 266 struct buf *a_bp; 267 } */ *ap; 268{ 269 270 if (ap->a_bp->b_vp == NULL || !chkvnlock(ap->a_bp->b_vp)) { 271 ap->a_bp->b_flags |= B_ERROR; 272 biodone(ap->a_bp); 273 return (EIO); 274 } 275 return (VOP_STRATEGY(ap->a_bp)); 276} 277 278/* 279 * Wait until the vnode has finished changing state. 280 */ |
281static int |
282dead_lock(ap) 283 struct vop_lock_args /* { 284 struct vnode *a_vp; 285 } */ *ap; 286{ 287 288 if (!chkvnlock(ap->a_vp)) 289 return (0); 290 return (VCALL(ap->a_vp, VOFFSET(vop_lock), ap)); 291} 292 293/* 294 * Wait until the vnode has finished changing state. 295 */ |
296static int |
297dead_bmap(ap) 298 struct vop_bmap_args /* { 299 struct vnode *a_vp; 300 daddr_t a_bn; 301 struct vnode **a_vpp; 302 daddr_t *a_bnp; 303 int *a_runp; 304 int *a_runb; --- 4 unchanged lines hidden (view full) --- 309 return (EIO); 310 return (VOP_BMAP(ap->a_vp, ap->a_bn, ap->a_vpp, ap->a_bnp, ap->a_runp, ap->a_runb)); 311} 312 313/* 314 * Print out the contents of a dead vnode. 315 */ 316/* ARGSUSED */ |
317static int |
318dead_print(ap) 319 struct vop_print_args /* { 320 struct vnode *a_vp; 321 } */ *ap; 322{ 323 324 printf("tag VT_NON, dead vnode\n"); 325 return (0); 326} 327 328/* 329 * Empty vnode failed operation 330 */ |
331static int |
332dead_ebadf() 333{ 334 335 return (EBADF); 336} 337 338/* 339 * Empty vnode bad operation 340 */ |
341static int |
342dead_badop() 343{ 344 345 panic("dead_badop called"); 346 /* NOTREACHED */ 347} 348 349/* --- 16 unchanged lines hidden --- |