Commit | Line | Data |
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a1d35437 KM |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
dbf0c423 | 5 | * %sccs.include.redist.c% |
a1d35437 | 6 | * |
cf275db0 | 7 | * @(#)spec_vnops.c 7.47 (Berkeley) %G% |
a1d35437 KM |
8 | */ |
9 | ||
17c64659 KB |
10 | #include <sys/param.h> |
11 | #include <sys/proc.h> | |
12 | #include <sys/systm.h> | |
13 | #include <sys/kernel.h> | |
14 | #include <sys/conf.h> | |
15 | #include <sys/buf.h> | |
16 | #include <sys/mount.h> | |
17 | #include <sys/namei.h> | |
18 | #include <sys/vnode.h> | |
19 | #include <sys/specdev.h> | |
20 | #include <sys/stat.h> | |
21 | #include <sys/errno.h> | |
22 | #include <sys/ioctl.h> | |
23 | #include <sys/file.h> | |
24 | #include <sys/disklabel.h> | |
a1d35437 | 25 | |
ccee3c59 MK |
26 | /* symbolic sleep message strings for devices */ |
27 | char devopn[] = "devopn"; | |
28 | char devio[] = "devio"; | |
29 | char devwait[] = "devwait"; | |
30 | char devin[] = "devin"; | |
31 | char devout[] = "devout"; | |
32 | char devioc[] = "devioc"; | |
33 | char devcls[] = "devcls"; | |
34 | ||
9342689a JH |
35 | int (**spec_vnodeop_p)(); |
36 | struct vnodeopv_entry_desc spec_vnodeop_entries[] = { | |
37 | { &vop_default_desc, vn_default_error }, | |
38 | { &vop_lookup_desc, spec_lookup }, /* lookup */ | |
39 | { &vop_create_desc, spec_create }, /* create */ | |
40 | { &vop_mknod_desc, spec_mknod }, /* mknod */ | |
41 | { &vop_open_desc, spec_open }, /* open */ | |
42 | { &vop_close_desc, spec_close }, /* close */ | |
43 | { &vop_access_desc, spec_access }, /* access */ | |
44 | { &vop_getattr_desc, spec_getattr }, /* getattr */ | |
45 | { &vop_setattr_desc, spec_setattr }, /* setattr */ | |
46 | { &vop_read_desc, spec_read }, /* read */ | |
47 | { &vop_write_desc, spec_write }, /* write */ | |
48 | { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ | |
49 | { &vop_select_desc, spec_select }, /* select */ | |
50 | { &vop_mmap_desc, spec_mmap }, /* mmap */ | |
51 | { &vop_fsync_desc, spec_fsync }, /* fsync */ | |
52 | { &vop_seek_desc, spec_seek }, /* seek */ | |
53 | { &vop_remove_desc, spec_remove }, /* remove */ | |
54 | { &vop_link_desc, spec_link }, /* link */ | |
55 | { &vop_rename_desc, spec_rename }, /* rename */ | |
56 | { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ | |
57 | { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ | |
58 | { &vop_symlink_desc, spec_symlink }, /* symlink */ | |
59 | { &vop_readdir_desc, spec_readdir }, /* readdir */ | |
60 | { &vop_readlink_desc, spec_readlink }, /* readlink */ | |
61 | { &vop_abortop_desc, spec_abortop }, /* abortop */ | |
62 | { &vop_inactive_desc, spec_inactive }, /* inactive */ | |
63 | { &vop_reclaim_desc, spec_reclaim }, /* reclaim */ | |
64 | { &vop_lock_desc, spec_lock }, /* lock */ | |
65 | { &vop_unlock_desc, spec_unlock }, /* unlock */ | |
66 | { &vop_bmap_desc, spec_bmap }, /* bmap */ | |
67 | { &vop_strategy_desc, spec_strategy }, /* strategy */ | |
68 | { &vop_print_desc, spec_print }, /* print */ | |
69 | { &vop_islocked_desc, spec_islocked }, /* islocked */ | |
70 | { &vop_advlock_desc, spec_advlock }, /* advlock */ | |
71 | { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ | |
9342689a JH |
72 | { &vop_valloc_desc, spec_valloc }, /* valloc */ |
73 | { &vop_vfree_desc, spec_vfree }, /* vfree */ | |
74 | { &vop_truncate_desc, spec_truncate }, /* truncate */ | |
75 | { &vop_update_desc, spec_update }, /* update */ | |
76 | { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ | |
77 | { (struct vnodeop_desc*)NULL, (int(*)())NULL } | |
a1d35437 | 78 | }; |
9342689a JH |
79 | struct vnodeopv_desc spec_vnodeop_opv_desc = |
80 | { &spec_vnodeop_p, spec_vnodeop_entries }; | |
a1d35437 | 81 | |
59b0713e KM |
82 | /* |
83 | * Trivial lookup routine that always fails. | |
84 | */ | |
6ee99c46 | 85 | int |
e2afbd7b KM |
86 | spec_lookup(ap) |
87 | struct vop_lookup_args /* { | |
88 | struct vnode *a_dvp; | |
89 | struct vnode **a_vpp; | |
90 | struct componentname *a_cnp; | |
91 | } */ *ap; | |
59b0713e KM |
92 | { |
93 | ||
e1b76915 | 94 | *ap->a_vpp = NULL; |
59b0713e KM |
95 | return (ENOTDIR); |
96 | } | |
97 | ||
a1d35437 | 98 | /* |
e15ce6a3 MK |
99 | * Open a special file: Don't allow open if fs is mounted -nodev, |
100 | * and don't allow opens of block devices that are currently mounted. | |
101 | * Otherwise, call device driver open function. | |
a1d35437 | 102 | */ |
3d5d83ff | 103 | /* ARGSUSED */ |
e2afbd7b KM |
104 | spec_open(ap) |
105 | struct vop_open_args /* { | |
106 | struct vnode *a_vp; | |
107 | int a_mode; | |
108 | struct ucred *a_cred; | |
109 | struct proc *a_p; | |
110 | } */ *ap; | |
a1d35437 | 111 | { |
406c9a0d JH |
112 | register struct vnode *vp = ap->a_vp; |
113 | dev_t dev = (dev_t)vp->v_rdev; | |
a1d35437 | 114 | register int maj = major(dev); |
5b2e9327 | 115 | int error; |
a1d35437 | 116 | |
406c9a0d | 117 | if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_NODEV)) |
786053cd KM |
118 | return (ENXIO); |
119 | ||
406c9a0d | 120 | switch (vp->v_type) { |
a1d35437 KM |
121 | |
122 | case VCHR: | |
123 | if ((u_int)maj >= nchrdev) | |
124 | return (ENXIO); | |
406c9a0d | 125 | VOP_UNLOCK(vp); |
e1b76915 | 126 | error = (*cdevsw[maj].d_open)(dev, ap->a_mode, S_IFCHR, ap->a_p); |
406c9a0d | 127 | VOP_LOCK(vp); |
b3bf09c7 | 128 | return (error); |
a1d35437 KM |
129 | |
130 | case VBLK: | |
131 | if ((u_int)maj >= nblkdev) | |
132 | return (ENXIO); | |
406c9a0d | 133 | if (error = ufs_mountedon(vp)) |
5b2e9327 | 134 | return (error); |
e1b76915 | 135 | return ((*bdevsw[maj].d_open)(dev, ap->a_mode, S_IFBLK, ap->a_p)); |
a1d35437 KM |
136 | } |
137 | return (0); | |
138 | } | |
139 | ||
a1d35437 KM |
140 | /* |
141 | * Vnode op for read | |
142 | */ | |
fe6cdffe | 143 | /* ARGSUSED */ |
e2afbd7b KM |
144 | spec_read(ap) |
145 | struct vop_read_args /* { | |
146 | struct vnode *a_vp; | |
147 | struct uio *a_uio; | |
148 | int a_ioflag; | |
149 | struct ucred *a_cred; | |
150 | } */ *ap; | |
a1d35437 | 151 | { |
406c9a0d JH |
152 | register struct vnode *vp = ap->a_vp; |
153 | register struct uio *uio = ap->a_uio; | |
154 | struct proc *p = uio->uio_procp; | |
7d4e5ac1 | 155 | struct buf *bp; |
2e4bbf7a | 156 | daddr_t bn, nextbn; |
7d4e5ac1 KM |
157 | long bsize, bscale; |
158 | struct partinfo dpart; | |
159 | register int n, on; | |
160 | int error = 0; | |
a1d35437 | 161 | |
68a834b0 | 162 | #ifdef DIAGNOSTIC |
406c9a0d | 163 | if (uio->uio_rw != UIO_READ) |
43444338 | 164 | panic("spec_read mode"); |
406c9a0d | 165 | if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) |
68a834b0 KM |
166 | panic("spec_read proc"); |
167 | #endif | |
406c9a0d | 168 | if (uio->uio_resid == 0) |
43444338 | 169 | return (0); |
43444338 | 170 | |
406c9a0d | 171 | switch (vp->v_type) { |
43444338 KM |
172 | |
173 | case VCHR: | |
406c9a0d JH |
174 | VOP_UNLOCK(vp); |
175 | error = (*cdevsw[major(vp->v_rdev)].d_read) | |
176 | (vp->v_rdev, uio, ap->a_ioflag); | |
177 | VOP_LOCK(vp); | |
43444338 KM |
178 | return (error); |
179 | ||
180 | case VBLK: | |
406c9a0d | 181 | if (uio->uio_offset < 0) |
43444338 | 182 | return (EINVAL); |
7d4e5ac1 | 183 | bsize = BLKDEV_IOSIZE; |
406c9a0d | 184 | if ((*bdevsw[major(vp->v_rdev)].d_ioctl)(vp->v_rdev, DIOCGPART, |
8429d022 | 185 | (caddr_t)&dpart, FREAD, p) == 0) { |
7d4e5ac1 KM |
186 | if (dpart.part->p_fstype == FS_BSDFFS && |
187 | dpart.part->p_frag != 0 && dpart.part->p_fsize != 0) | |
188 | bsize = dpart.part->p_frag * | |
189 | dpart.part->p_fsize; | |
190 | } | |
191 | bscale = bsize / DEV_BSIZE; | |
192 | do { | |
406c9a0d JH |
193 | bn = (uio->uio_offset / DEV_BSIZE) &~ (bscale - 1); |
194 | on = uio->uio_offset % bsize; | |
195 | n = MIN((unsigned)(bsize - on), uio->uio_resid); | |
196 | if (vp->v_lastr + bscale == bn) { | |
2e4bbf7a | 197 | nextbn = bn + bscale; |
406c9a0d | 198 | error = breadn(vp, bn, (int)bsize, &nextbn, |
2e4bbf7a KM |
199 | (int *)&bsize, 1, NOCRED, &bp); |
200 | } else | |
406c9a0d JH |
201 | error = bread(vp, bn, (int)bsize, NOCRED, &bp); |
202 | vp->v_lastr = bn; | |
7d4e5ac1 KM |
203 | n = MIN(n, bsize - bp->b_resid); |
204 | if (error) { | |
205 | brelse(bp); | |
206 | return (error); | |
207 | } | |
406c9a0d | 208 | error = uiomove(bp->b_un.b_addr + on, n, uio); |
7d4e5ac1 KM |
209 | if (n + on == bsize) |
210 | bp->b_flags |= B_AGE; | |
211 | brelse(bp); | |
406c9a0d | 212 | } while (error == 0 && uio->uio_resid > 0 && n != 0); |
7d4e5ac1 | 213 | return (error); |
43444338 KM |
214 | |
215 | default: | |
216 | panic("spec_read type"); | |
217 | } | |
218 | /* NOTREACHED */ | |
a1d35437 KM |
219 | } |
220 | ||
221 | /* | |
222 | * Vnode op for write | |
223 | */ | |
fe6cdffe | 224 | /* ARGSUSED */ |
e2afbd7b KM |
225 | spec_write(ap) |
226 | struct vop_write_args /* { | |
227 | struct vnode *a_vp; | |
228 | struct uio *a_uio; | |
229 | int a_ioflag; | |
230 | struct ucred *a_cred; | |
231 | } */ *ap; | |
a1d35437 | 232 | { |
406c9a0d JH |
233 | register struct vnode *vp = ap->a_vp; |
234 | register struct uio *uio = ap->a_uio; | |
235 | struct proc *p = uio->uio_procp; | |
7d4e5ac1 KM |
236 | struct buf *bp; |
237 | daddr_t bn; | |
238 | int bsize, blkmask; | |
239 | struct partinfo dpart; | |
9db58063 KM |
240 | register int n, on; |
241 | int error = 0; | |
a1d35437 | 242 | |
68a834b0 | 243 | #ifdef DIAGNOSTIC |
406c9a0d | 244 | if (uio->uio_rw != UIO_WRITE) |
43444338 | 245 | panic("spec_write mode"); |
406c9a0d | 246 | if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) |
68a834b0 KM |
247 | panic("spec_write proc"); |
248 | #endif | |
43444338 | 249 | |
406c9a0d | 250 | switch (vp->v_type) { |
43444338 KM |
251 | |
252 | case VCHR: | |
406c9a0d JH |
253 | VOP_UNLOCK(vp); |
254 | error = (*cdevsw[major(vp->v_rdev)].d_write) | |
255 | (vp->v_rdev, uio, ap->a_ioflag); | |
256 | VOP_LOCK(vp); | |
43444338 KM |
257 | return (error); |
258 | ||
259 | case VBLK: | |
406c9a0d | 260 | if (uio->uio_resid == 0) |
43444338 | 261 | return (0); |
406c9a0d | 262 | if (uio->uio_offset < 0) |
43444338 | 263 | return (EINVAL); |
7d4e5ac1 | 264 | bsize = BLKDEV_IOSIZE; |
406c9a0d | 265 | if ((*bdevsw[major(vp->v_rdev)].d_ioctl)(vp->v_rdev, DIOCGPART, |
8429d022 | 266 | (caddr_t)&dpart, FREAD, p) == 0) { |
7d4e5ac1 KM |
267 | if (dpart.part->p_fstype == FS_BSDFFS && |
268 | dpart.part->p_frag != 0 && dpart.part->p_fsize != 0) | |
269 | bsize = dpart.part->p_frag * | |
270 | dpart.part->p_fsize; | |
271 | } | |
272 | blkmask = (bsize / DEV_BSIZE) - 1; | |
273 | do { | |
406c9a0d JH |
274 | bn = (uio->uio_offset / DEV_BSIZE) &~ blkmask; |
275 | on = uio->uio_offset % bsize; | |
276 | n = MIN((unsigned)(bsize - on), uio->uio_resid); | |
7d4e5ac1 | 277 | if (n == bsize) |
406c9a0d | 278 | bp = getblk(vp, bn, bsize); |
7d4e5ac1 | 279 | else |
406c9a0d | 280 | error = bread(vp, bn, bsize, NOCRED, &bp); |
7d4e5ac1 KM |
281 | n = MIN(n, bsize - bp->b_resid); |
282 | if (error) { | |
283 | brelse(bp); | |
284 | return (error); | |
285 | } | |
406c9a0d | 286 | error = uiomove(bp->b_un.b_addr + on, n, uio); |
7d4e5ac1 KM |
287 | if (n + on == bsize) { |
288 | bp->b_flags |= B_AGE; | |
289 | bawrite(bp); | |
290 | } else | |
291 | bdwrite(bp); | |
406c9a0d | 292 | } while (error == 0 && uio->uio_resid > 0 && n != 0); |
7d4e5ac1 | 293 | return (error); |
43444338 KM |
294 | |
295 | default: | |
296 | panic("spec_write type"); | |
297 | } | |
298 | /* NOTREACHED */ | |
a1d35437 KM |
299 | } |
300 | ||
301 | /* | |
302 | * Device ioctl operation. | |
303 | */ | |
3d5d83ff | 304 | /* ARGSUSED */ |
e2afbd7b KM |
305 | spec_ioctl(ap) |
306 | struct vop_ioctl_args /* { | |
307 | struct vnode *a_vp; | |
308 | int a_command; | |
309 | caddr_t a_data; | |
310 | int a_fflag; | |
311 | struct ucred *a_cred; | |
312 | struct proc *a_p; | |
313 | } */ *ap; | |
a1d35437 | 314 | { |
e1b76915 | 315 | dev_t dev = ap->a_vp->v_rdev; |
a1d35437 | 316 | |
e1b76915 | 317 | switch (ap->a_vp->v_type) { |
a1d35437 KM |
318 | |
319 | case VCHR: | |
e1b76915 JH |
320 | return ((*cdevsw[major(dev)].d_ioctl)(dev, ap->a_command, ap->a_data, |
321 | ap->a_fflag, ap->a_p)); | |
a1d35437 KM |
322 | |
323 | case VBLK: | |
e1b76915 | 324 | if (ap->a_command == 0 && (int)ap->a_data == B_TAPE) |
b9a4d0ff KM |
325 | if (bdevsw[major(dev)].d_flags & B_TAPE) |
326 | return (0); | |
327 | else | |
328 | return (1); | |
e1b76915 JH |
329 | return ((*bdevsw[major(dev)].d_ioctl)(dev, ap->a_command, ap->a_data, |
330 | ap->a_fflag, ap->a_p)); | |
a1d35437 KM |
331 | |
332 | default: | |
ad27f720 | 333 | panic("spec_ioctl"); |
a1d35437 KM |
334 | /* NOTREACHED */ |
335 | } | |
336 | } | |
337 | ||
3d5d83ff | 338 | /* ARGSUSED */ |
e2afbd7b KM |
339 | spec_select(ap) |
340 | struct vop_select_args /* { | |
341 | struct vnode *a_vp; | |
342 | int a_which; | |
343 | int a_fflags; | |
344 | struct ucred *a_cred; | |
345 | struct proc *a_p; | |
346 | } */ *ap; | |
a1d35437 | 347 | { |
a1d35437 KM |
348 | register dev_t dev; |
349 | ||
e1b76915 | 350 | switch (ap->a_vp->v_type) { |
a1d35437 KM |
351 | |
352 | default: | |
353 | return (1); /* XXX */ | |
354 | ||
355 | case VCHR: | |
e1b76915 JH |
356 | dev = ap->a_vp->v_rdev; |
357 | return (*cdevsw[major(dev)].d_select)(dev, ap->a_which, ap->a_p); | |
a1d35437 KM |
358 | } |
359 | } | |
e2afbd7b KM |
360 | /* |
361 | * Synch buffers associated with a block device | |
362 | */ | |
363 | /* ARGSUSED */ | |
364 | int | |
365 | spec_fsync(ap) | |
366 | struct vop_fsync_args /* { | |
367 | struct vnode *a_vp; | |
368 | struct ucred *a_cred; | |
369 | int a_waitfor; | |
370 | struct proc *a_p; | |
371 | } */ *ap; | |
372 | { | |
373 | register struct vnode *vp = ap->a_vp; | |
374 | register struct buf *bp; | |
375 | struct buf *nbp; | |
376 | int s, error, allerror = 0; | |
377 | ||
378 | if (vp->v_type == VCHR) | |
379 | return (0); | |
380 | /* | |
381 | * Flush all dirty buffers associated with a block device. | |
382 | */ | |
383 | loop: | |
384 | s = splbio(); | |
385 | for (bp = vp->v_dirtyblkhd; bp; bp = nbp) { | |
386 | nbp = bp->b_blockf; | |
387 | if ((bp->b_flags & B_BUSY)) | |
388 | continue; | |
389 | if ((bp->b_flags & B_DELWRI) == 0) | |
390 | panic("spec_fsync: not dirty"); | |
391 | bremfree(bp); | |
392 | bp->b_flags |= B_BUSY; | |
393 | splx(s); | |
394 | if (error = bawrite(bp)) | |
395 | allerror = error; | |
396 | goto loop; | |
397 | } | |
398 | if (ap->a_waitfor == MNT_WAIT) { | |
399 | while (vp->v_numoutput) { | |
400 | vp->v_flag |= VBWAIT; | |
401 | sleep((caddr_t)&vp->v_numoutput, PRIBIO + 1); | |
402 | } | |
403 | #ifdef DIAGNOSTIC | |
404 | if (vp->v_dirtyblkhd) { | |
405 | vprint("spec_fsync: dirty", vp); | |
406 | goto loop; | |
407 | } | |
408 | #endif | |
409 | } | |
410 | splx(s); | |
411 | return (allerror); | |
412 | } | |
a1d35437 KM |
413 | |
414 | /* | |
415 | * Just call the device strategy routine | |
416 | */ | |
e2afbd7b KM |
417 | spec_strategy(ap) |
418 | struct vop_strategy_args /* { | |
419 | struct buf *a_bp; | |
420 | } */ *ap; | |
a1d35437 | 421 | { |
b9a4d0ff | 422 | |
e1b76915 | 423 | (*bdevsw[major(ap->a_bp->b_dev)].d_strategy)(ap->a_bp); |
a1d35437 KM |
424 | return (0); |
425 | } | |
426 | ||
b9a4d0ff KM |
427 | /* |
428 | * This is a noop, simply returning what one has been given. | |
429 | */ | |
e2afbd7b KM |
430 | spec_bmap(ap) |
431 | struct vop_bmap_args /* { | |
432 | struct vnode *a_vp; | |
433 | daddr_t a_bn; | |
434 | struct vnode **a_vpp; | |
435 | daddr_t *a_bnp; | |
436 | } */ *ap; | |
b9a4d0ff KM |
437 | { |
438 | ||
e1b76915 JH |
439 | if (ap->a_vpp != NULL) |
440 | *ap->a_vpp = ap->a_vp; | |
441 | if (ap->a_bnp != NULL) | |
442 | *ap->a_bnp = ap->a_bn; | |
b9a4d0ff KM |
443 | return (0); |
444 | } | |
445 | ||
1c00bf64 KM |
446 | /* |
447 | * At the moment we do not do any locking. | |
448 | */ | |
ff4fb102 | 449 | /* ARGSUSED */ |
e2afbd7b KM |
450 | spec_lock(ap) |
451 | struct vop_lock_args /* { | |
452 | struct vnode *a_vp; | |
453 | } */ *ap; | |
a1d35437 | 454 | { |
a1d35437 | 455 | |
a1d35437 KM |
456 | return (0); |
457 | } | |
458 | ||
ff4fb102 | 459 | /* ARGSUSED */ |
e2afbd7b KM |
460 | spec_unlock(ap) |
461 | struct vop_unlock_args /* { | |
462 | struct vnode *a_vp; | |
463 | } */ *ap; | |
a1d35437 | 464 | { |
a1d35437 | 465 | |
a1d35437 KM |
466 | return (0); |
467 | } | |
468 | ||
a1d35437 KM |
469 | /* |
470 | * Device close routine | |
471 | */ | |
3d5d83ff | 472 | /* ARGSUSED */ |
e2afbd7b KM |
473 | spec_close(ap) |
474 | struct vop_close_args /* { | |
475 | struct vnode *a_vp; | |
476 | int a_fflag; | |
477 | struct ucred *a_cred; | |
478 | struct proc *a_p; | |
479 | } */ *ap; | |
a1d35437 | 480 | { |
406c9a0d JH |
481 | register struct vnode *vp = ap->a_vp; |
482 | dev_t dev = vp->v_rdev; | |
e15ce6a3 | 483 | int (*devclose) __P((dev_t, int, int, struct proc *)); |
e2afbd7b | 484 | int mode, error; |
a1d35437 | 485 | |
406c9a0d | 486 | switch (vp->v_type) { |
3d5d83ff KM |
487 | |
488 | case VCHR: | |
f4b3ea62 KM |
489 | /* |
490 | * If the vnode is locked, then we are in the midst | |
491 | * of forcably closing the device, otherwise we only | |
492 | * close on last reference. | |
493 | */ | |
406c9a0d | 494 | if (vcount(vp) > 1 && (vp->v_flag & VXLOCK) == 0) |
3d5d83ff | 495 | return (0); |
e15ce6a3 | 496 | devclose = cdevsw[major(dev)].d_close; |
1c00bf64 | 497 | mode = S_IFCHR; |
3d5d83ff KM |
498 | break; |
499 | ||
500 | case VBLK: | |
501 | /* | |
502 | * On last close of a block device (that isn't mounted) | |
503 | * we must invalidate any in core blocks, so that | |
504 | * we can, for instance, change floppy disks. | |
505 | */ | |
e2afbd7b KM |
506 | if (error = vinvalbuf(vp, 1, ap->a_cred, ap->a_p)) |
507 | return (error); | |
3d5d83ff | 508 | /* |
f4b3ea62 KM |
509 | * We do not want to really close the device if it |
510 | * is still in use unless we are trying to close it | |
511 | * forcibly. Since every use (buffer, vnode, swap, cmap) | |
3ab57521 KM |
512 | * holds a reference to the vnode, and because we mark |
513 | * any other vnodes that alias this device, when the | |
514 | * sum of the reference counts on all the aliased | |
515 | * vnodes descends to one, we are on last close. | |
3d5d83ff | 516 | */ |
406c9a0d | 517 | if (vcount(vp) > 1 && (vp->v_flag & VXLOCK) == 0) |
3d5d83ff | 518 | return (0); |
e15ce6a3 | 519 | devclose = bdevsw[major(dev)].d_close; |
1c00bf64 | 520 | mode = S_IFBLK; |
3d5d83ff KM |
521 | break; |
522 | ||
523 | default: | |
ad27f720 | 524 | panic("spec_close: not special"); |
3d5d83ff KM |
525 | } |
526 | ||
e1b76915 | 527 | return ((*devclose)(dev, ap->a_fflag, mode, ap->a_p)); |
a1d35437 KM |
528 | } |
529 | ||
b9a4d0ff KM |
530 | /* |
531 | * Print out the contents of a special device vnode. | |
532 | */ | |
e2afbd7b KM |
533 | spec_print(ap) |
534 | struct vop_print_args /* { | |
535 | struct vnode *a_vp; | |
536 | } */ *ap; | |
b9a4d0ff KM |
537 | { |
538 | ||
e1b76915 JH |
539 | printf("tag VT_NON, dev %d, %d\n", major(ap->a_vp->v_rdev), |
540 | minor(ap->a_vp->v_rdev)); | |
b9a4d0ff KM |
541 | } |
542 | ||
a4128336 KM |
543 | /* |
544 | * Special device advisory byte-level locks. | |
545 | */ | |
68a834b0 | 546 | /* ARGSUSED */ |
e2afbd7b KM |
547 | spec_advlock(ap) |
548 | struct vop_advlock_args /* { | |
549 | struct vnode *a_vp; | |
550 | caddr_t a_id; | |
551 | int a_op; | |
552 | struct flock *a_fl; | |
553 | int a_flags; | |
554 | } */ *ap; | |
a4128336 KM |
555 | { |
556 | ||
557 | return (EOPNOTSUPP); | |
558 | } | |
559 | ||
a1d35437 | 560 | /* |
7bbe72a5 KM |
561 | * Special device failed operation |
562 | */ | |
563 | spec_ebadf() | |
564 | { | |
565 | ||
566 | return (EBADF); | |
567 | } | |
568 | ||
569 | /* | |
570 | * Special device bad operation | |
a1d35437 | 571 | */ |
ad27f720 | 572 | spec_badop() |
a1d35437 KM |
573 | { |
574 | ||
ad27f720 | 575 | panic("spec_badop called"); |
59b0713e | 576 | /* NOTREACHED */ |
a1d35437 | 577 | } |