1 | /* $NetBSD: ccd.c,v 1.168 2016/11/20 02:35:19 pgoyette Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe, and by Andrew Doran. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copyright (c) 1988 University of Utah. |
34 | * Copyright (c) 1990, 1993 |
35 | * The Regents of the University of California. All rights reserved. |
36 | * |
37 | * This code is derived from software contributed to Berkeley by |
38 | * the Systems Programming Group of the University of Utah Computer |
39 | * Science Department. |
40 | * |
41 | * Redistribution and use in source and binary forms, with or without |
42 | * modification, are permitted provided that the following conditions |
43 | * are met: |
44 | * 1. Redistributions of source code must retain the above copyright |
45 | * notice, this list of conditions and the following disclaimer. |
46 | * 2. Redistributions in binary form must reproduce the above copyright |
47 | * notice, this list of conditions and the following disclaimer in the |
48 | * documentation and/or other materials provided with the distribution. |
49 | * 3. Neither the name of the University nor the names of its contributors |
50 | * may be used to endorse or promote products derived from this software |
51 | * without specific prior written permission. |
52 | * |
53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
63 | * SUCH DAMAGE. |
64 | * |
65 | * from: Utah $Hdr: cd.c 1.6 90/11/28$ |
66 | * |
67 | * @(#)cd.c 8.2 (Berkeley) 11/16/93 |
68 | */ |
69 | |
70 | /* |
71 | * "Concatenated" disk driver. |
72 | * |
73 | * Notes on concurrency: |
74 | * |
75 | * => sc_dvlock serializes access to the device nodes, excluding block I/O. |
76 | * |
77 | * => sc_iolock serializes access to (sc_flags & CCDF_INITED), disk stats, |
78 | * sc_stop, sc_bufq and b_resid from master buffers. |
79 | * |
80 | * => a combination of CCDF_INITED, sc_inflight, and sc_iolock is used to |
81 | * serialize I/O and configuration changes. |
82 | * |
83 | * => the in-core disk label does not change while the device is open. |
84 | * |
85 | * On memory consumption: ccd fans out I/O requests and so needs to |
86 | * allocate memory. If the system is desperately low on memory, we |
87 | * single thread I/O. |
88 | */ |
89 | |
90 | #include <sys/cdefs.h> |
91 | __KERNEL_RCSID(0, "$NetBSD: ccd.c,v 1.168 2016/11/20 02:35:19 pgoyette Exp $" ); |
92 | |
93 | #if defined(_KERNEL_OPT) |
94 | #include "opt_compat_netbsd.h" |
95 | #endif |
96 | |
97 | #include <sys/param.h> |
98 | #include <sys/systm.h> |
99 | #include <sys/kernel.h> |
100 | #include <sys/proc.h> |
101 | #include <sys/errno.h> |
102 | #include <sys/buf.h> |
103 | #include <sys/kmem.h> |
104 | #include <sys/pool.h> |
105 | #include <sys/module.h> |
106 | #include <sys/namei.h> |
107 | #include <sys/stat.h> |
108 | #include <sys/ioctl.h> |
109 | #include <sys/disklabel.h> |
110 | #include <sys/device.h> |
111 | #include <sys/disk.h> |
112 | #include <sys/syslog.h> |
113 | #include <sys/fcntl.h> |
114 | #include <sys/vnode.h> |
115 | #include <sys/conf.h> |
116 | #include <sys/mutex.h> |
117 | #include <sys/queue.h> |
118 | #include <sys/kauth.h> |
119 | #include <sys/kthread.h> |
120 | #include <sys/bufq.h> |
121 | #include <sys/sysctl.h> |
122 | |
123 | #include <uvm/uvm_extern.h> |
124 | |
125 | #include <dev/ccdvar.h> |
126 | #include <dev/dkvar.h> |
127 | |
128 | #include <miscfs/specfs/specdev.h> /* for v_rdev */ |
129 | |
130 | #include "ioconf.h" |
131 | |
132 | #if defined(CCDDEBUG) && !defined(DEBUG) |
133 | #define DEBUG |
134 | #endif |
135 | |
136 | #ifdef DEBUG |
137 | #define CCDB_FOLLOW 0x01 |
138 | #define CCDB_INIT 0x02 |
139 | #define CCDB_IO 0x04 |
140 | #define CCDB_LABEL 0x08 |
141 | #define CCDB_VNODE 0x10 |
142 | int ccddebug = 0x00; |
143 | #endif |
144 | |
145 | #define ccdunit(x) DISKUNIT(x) |
146 | |
147 | struct ccdbuf { |
148 | struct buf cb_buf; /* new I/O buf */ |
149 | struct buf *cb_obp; /* ptr. to original I/O buf */ |
150 | struct ccd_softc *cb_sc; /* pointer to ccd softc */ |
151 | int cb_comp; /* target component */ |
152 | SIMPLEQ_ENTRY(ccdbuf) cb_q; /* fifo of component buffers */ |
153 | }; |
154 | |
155 | /* component buffer pool */ |
156 | static pool_cache_t ccd_cache; |
157 | |
158 | #define CCD_GETBUF() pool_cache_get(ccd_cache, PR_WAITOK) |
159 | #define CCD_PUTBUF(cbp) pool_cache_put(ccd_cache, cbp) |
160 | |
161 | #define CCDLABELDEV(dev) \ |
162 | (MAKEDISKDEV(major((dev)), ccdunit((dev)), RAW_PART)) |
163 | |
164 | /* called by main() at boot time */ |
165 | void ccddetach(void); |
166 | |
167 | /* called by biodone() at interrupt time */ |
168 | static void ccdiodone(struct buf *); |
169 | |
170 | static void ccdinterleave(struct ccd_softc *); |
171 | static int ccdinit(struct ccd_softc *, char **, struct vnode **, |
172 | struct lwp *); |
173 | static struct ccdbuf *ccdbuffer(struct ccd_softc *, struct buf *, |
174 | daddr_t, void *, long); |
175 | static void ccdgetdefaultlabel(struct ccd_softc *, struct disklabel *); |
176 | static void ccdgetdisklabel(dev_t); |
177 | static void ccdmakedisklabel(struct ccd_softc *); |
178 | static void ccdstart(struct ccd_softc *); |
179 | static void ccdthread(void *); |
180 | |
181 | static dev_type_open(ccdopen); |
182 | static dev_type_close(ccdclose); |
183 | static dev_type_read(ccdread); |
184 | static dev_type_write(ccdwrite); |
185 | static dev_type_ioctl(ccdioctl); |
186 | static dev_type_strategy(ccdstrategy); |
187 | static dev_type_size(ccdsize); |
188 | |
189 | const struct bdevsw ccd_bdevsw = { |
190 | .d_open = ccdopen, |
191 | .d_close = ccdclose, |
192 | .d_strategy = ccdstrategy, |
193 | .d_ioctl = ccdioctl, |
194 | .d_dump = nodump, |
195 | .d_psize = ccdsize, |
196 | .d_discard = nodiscard, |
197 | .d_flag = D_DISK | D_MPSAFE |
198 | }; |
199 | |
200 | const struct cdevsw ccd_cdevsw = { |
201 | .d_open = ccdopen, |
202 | .d_close = ccdclose, |
203 | .d_read = ccdread, |
204 | .d_write = ccdwrite, |
205 | .d_ioctl = ccdioctl, |
206 | .d_stop = nostop, |
207 | .d_tty = notty, |
208 | .d_poll = nopoll, |
209 | .d_mmap = nommap, |
210 | .d_kqfilter = nokqfilter, |
211 | .d_discard = nodiscard, |
212 | .d_flag = D_DISK | D_MPSAFE |
213 | }; |
214 | |
215 | #ifdef DEBUG |
216 | static void printiinfo(struct ccdiinfo *); |
217 | #endif |
218 | |
219 | static LIST_HEAD(, ccd_softc) ccds = LIST_HEAD_INITIALIZER(ccds); |
220 | static kmutex_t ccd_lock; |
221 | static size_t ccd_nactive = 0; |
222 | |
223 | #ifdef _MODULE |
224 | static struct sysctllog *ccd_clog; |
225 | #endif |
226 | |
227 | SYSCTL_SETUP_PROTO(sysctl_kern_ccd_setup); |
228 | |
229 | static struct ccd_softc * |
230 | ccdcreate(int unit) { |
231 | struct ccd_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP); |
232 | if (sc == NULL) { |
233 | #ifdef DIAGNOSTIC |
234 | printf("%s: out of memory\n" , __func__); |
235 | #endif |
236 | return NULL; |
237 | } |
238 | /* Initialize per-softc structures. */ |
239 | snprintf(sc->sc_xname, sizeof(sc->sc_xname), "ccd%d" , unit); |
240 | sc->sc_unit = unit; |
241 | mutex_init(&sc->sc_dvlock, MUTEX_DEFAULT, IPL_NONE); |
242 | sc->sc_iolock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); |
243 | cv_init(&sc->sc_stop, "ccdstop" ); |
244 | cv_init(&sc->sc_push, "ccdthr" ); |
245 | disk_init(&sc->sc_dkdev, sc->sc_xname, NULL); /* XXX */ |
246 | return sc; |
247 | } |
248 | |
249 | static void |
250 | ccddestroy(struct ccd_softc *sc) { |
251 | mutex_obj_free(sc->sc_iolock); |
252 | mutex_exit(&sc->sc_dvlock); |
253 | mutex_destroy(&sc->sc_dvlock); |
254 | cv_destroy(&sc->sc_stop); |
255 | cv_destroy(&sc->sc_push); |
256 | disk_destroy(&sc->sc_dkdev); |
257 | kmem_free(sc, sizeof(*sc)); |
258 | } |
259 | |
260 | static struct ccd_softc * |
261 | ccdget(int unit, int make) { |
262 | struct ccd_softc *sc; |
263 | if (unit < 0) { |
264 | #ifdef DIAGNOSTIC |
265 | panic("%s: unit %d!" , __func__, unit); |
266 | #endif |
267 | return NULL; |
268 | } |
269 | mutex_enter(&ccd_lock); |
270 | LIST_FOREACH(sc, &ccds, sc_link) { |
271 | if (sc->sc_unit == unit) { |
272 | mutex_exit(&ccd_lock); |
273 | return sc; |
274 | } |
275 | } |
276 | mutex_exit(&ccd_lock); |
277 | if (!make) |
278 | return NULL; |
279 | if ((sc = ccdcreate(unit)) == NULL) |
280 | return NULL; |
281 | mutex_enter(&ccd_lock); |
282 | LIST_INSERT_HEAD(&ccds, sc, sc_link); |
283 | ccd_nactive++; |
284 | mutex_exit(&ccd_lock); |
285 | return sc; |
286 | } |
287 | |
288 | static void |
289 | ccdput(struct ccd_softc *sc) { |
290 | mutex_enter(&ccd_lock); |
291 | LIST_REMOVE(sc, sc_link); |
292 | ccd_nactive--; |
293 | mutex_exit(&ccd_lock); |
294 | ccddestroy(sc); |
295 | } |
296 | |
297 | /* |
298 | * Called by main() during pseudo-device attachment. All we need |
299 | * to do is allocate enough space for devices to be configured later. |
300 | */ |
301 | void |
302 | ccdattach(int num) |
303 | { |
304 | mutex_init(&ccd_lock, MUTEX_DEFAULT, IPL_NONE); |
305 | |
306 | /* Initialize the component buffer pool. */ |
307 | ccd_cache = pool_cache_init(sizeof(struct ccdbuf), 0, |
308 | 0, 0, "ccdbuf" , NULL, IPL_BIO, NULL, NULL, NULL); |
309 | } |
310 | |
311 | void |
312 | ccddetach(void) |
313 | { |
314 | pool_cache_destroy(ccd_cache); |
315 | mutex_destroy(&ccd_lock); |
316 | } |
317 | |
318 | static int |
319 | ccdinit(struct ccd_softc *cs, char **cpaths, struct vnode **vpp, |
320 | struct lwp *l) |
321 | { |
322 | struct ccdcinfo *ci = NULL; |
323 | int ix; |
324 | struct ccdgeom *ccg = &cs->sc_geom; |
325 | char *tmppath; |
326 | int error, path_alloced; |
327 | uint64_t psize, minsize; |
328 | unsigned secsize, maxsecsize; |
329 | struct disk_geom *dg; |
330 | |
331 | #ifdef DEBUG |
332 | if (ccddebug & (CCDB_FOLLOW|CCDB_INIT)) |
333 | printf("%s: ccdinit\n" , cs->sc_xname); |
334 | #endif |
335 | |
336 | /* Allocate space for the component info. */ |
337 | cs->sc_cinfo = kmem_alloc(cs->sc_nccdisks * sizeof(*cs->sc_cinfo), |
338 | KM_SLEEP); |
339 | tmppath = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
340 | |
341 | cs->sc_size = 0; |
342 | |
343 | /* |
344 | * Verify that each component piece exists and record |
345 | * relevant information about it. |
346 | */ |
347 | maxsecsize = 0; |
348 | minsize = 0; |
349 | for (ix = 0, path_alloced = 0; ix < cs->sc_nccdisks; ix++) { |
350 | ci = &cs->sc_cinfo[ix]; |
351 | ci->ci_vp = vpp[ix]; |
352 | |
353 | /* |
354 | * Copy in the pathname of the component. |
355 | */ |
356 | memset(tmppath, 0, MAXPATHLEN); /* sanity */ |
357 | error = copyinstr(cpaths[ix], tmppath, |
358 | MAXPATHLEN, &ci->ci_pathlen); |
359 | if (ci->ci_pathlen == 0) |
360 | error = EINVAL; |
361 | if (error) { |
362 | #ifdef DEBUG |
363 | if (ccddebug & (CCDB_FOLLOW|CCDB_INIT)) |
364 | printf("%s: can't copy path, error = %d\n" , |
365 | cs->sc_xname, error); |
366 | #endif |
367 | goto out; |
368 | } |
369 | ci->ci_path = kmem_alloc(ci->ci_pathlen, KM_SLEEP); |
370 | memcpy(ci->ci_path, tmppath, ci->ci_pathlen); |
371 | path_alloced++; |
372 | |
373 | /* |
374 | * XXX: Cache the component's dev_t. |
375 | */ |
376 | ci->ci_dev = vpp[ix]->v_rdev; |
377 | |
378 | /* |
379 | * Get partition information for the component. |
380 | */ |
381 | error = getdisksize(vpp[ix], &psize, &secsize); |
382 | if (error) { |
383 | #ifdef DEBUG |
384 | if (ccddebug & (CCDB_FOLLOW|CCDB_INIT)) |
385 | printf("%s: %s: disksize failed, error = %d\n" , |
386 | cs->sc_xname, ci->ci_path, error); |
387 | #endif |
388 | goto out; |
389 | } |
390 | |
391 | /* |
392 | * Calculate the size, truncating to an interleave |
393 | * boundary if necessary. |
394 | */ |
395 | maxsecsize = secsize > maxsecsize ? secsize : maxsecsize; |
396 | if (cs->sc_ileave > 1) |
397 | psize -= psize % cs->sc_ileave; |
398 | |
399 | if (psize == 0) { |
400 | #ifdef DEBUG |
401 | if (ccddebug & (CCDB_FOLLOW|CCDB_INIT)) |
402 | printf("%s: %s: size == 0\n" , |
403 | cs->sc_xname, ci->ci_path); |
404 | #endif |
405 | error = ENODEV; |
406 | goto out; |
407 | } |
408 | |
409 | if (minsize == 0 || psize < minsize) |
410 | minsize = psize; |
411 | ci->ci_size = psize; |
412 | cs->sc_size += psize; |
413 | } |
414 | |
415 | /* |
416 | * Don't allow the interleave to be smaller than |
417 | * the biggest component sector. |
418 | */ |
419 | if ((cs->sc_ileave > 0) && |
420 | (cs->sc_ileave < (maxsecsize / DEV_BSIZE))) { |
421 | #ifdef DEBUG |
422 | if (ccddebug & (CCDB_FOLLOW|CCDB_INIT)) |
423 | printf("%s: interleave must be at least %d\n" , |
424 | cs->sc_xname, (maxsecsize / DEV_BSIZE)); |
425 | #endif |
426 | error = EINVAL; |
427 | goto out; |
428 | } |
429 | |
430 | /* |
431 | * If uniform interleave is desired set all sizes to that of |
432 | * the smallest component. |
433 | */ |
434 | if (cs->sc_flags & CCDF_UNIFORM) { |
435 | for (ci = cs->sc_cinfo; |
436 | ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++) |
437 | ci->ci_size = minsize; |
438 | |
439 | cs->sc_size = cs->sc_nccdisks * minsize; |
440 | } |
441 | |
442 | /* |
443 | * Construct the interleave table. |
444 | */ |
445 | ccdinterleave(cs); |
446 | |
447 | /* |
448 | * Create pseudo-geometry based on 1MB cylinders. It's |
449 | * pretty close. |
450 | */ |
451 | ccg->ccg_secsize = DEV_BSIZE; |
452 | ccg->ccg_ntracks = 1; |
453 | ccg->ccg_nsectors = 1024 * (1024 / ccg->ccg_secsize); |
454 | ccg->ccg_ncylinders = cs->sc_size / ccg->ccg_nsectors; |
455 | |
456 | dg = &cs->sc_dkdev.dk_geom; |
457 | memset(dg, 0, sizeof(*dg)); |
458 | dg->dg_secperunit = cs->sc_size; |
459 | dg->dg_secsize = ccg->ccg_secsize; |
460 | dg->dg_nsectors = ccg->ccg_nsectors; |
461 | dg->dg_ntracks = ccg->ccg_ntracks; |
462 | dg->dg_ncylinders = ccg->ccg_ncylinders; |
463 | |
464 | if (cs->sc_ileave > 0) |
465 | aprint_normal("%s: Interleaving %d component%s " |
466 | "(%d block interleave)\n" , cs->sc_xname, |
467 | cs->sc_nccdisks, (cs->sc_nccdisks != 0 ? "s" : "" ), |
468 | cs->sc_ileave); |
469 | else |
470 | aprint_normal("%s: Concatenating %d component%s\n" , |
471 | cs->sc_xname, |
472 | cs->sc_nccdisks, (cs->sc_nccdisks != 0 ? "s" : "" )); |
473 | for (ix = 0; ix < cs->sc_nccdisks; ix++) { |
474 | ci = &cs->sc_cinfo[ix]; |
475 | aprint_normal("%s: %s (%ju blocks)\n" , cs->sc_xname, |
476 | ci->ci_path, (uintmax_t)ci->ci_size); |
477 | } |
478 | aprint_normal("%s: total %ju blocks\n" , cs->sc_xname, cs->sc_size); |
479 | |
480 | /* |
481 | * Create thread to handle deferred I/O. |
482 | */ |
483 | cs->sc_zap = false; |
484 | error = kthread_create(PRI_BIO, KTHREAD_MPSAFE, NULL, ccdthread, |
485 | cs, &cs->sc_thread, "%s" , cs->sc_xname); |
486 | if (error) { |
487 | printf("ccdinit: can't create thread: %d\n" , error); |
488 | goto out; |
489 | } |
490 | |
491 | /* |
492 | * Only now that everything is set up can we enable the device. |
493 | */ |
494 | mutex_enter(cs->sc_iolock); |
495 | cs->sc_flags |= CCDF_INITED; |
496 | mutex_exit(cs->sc_iolock); |
497 | kmem_free(tmppath, MAXPATHLEN); |
498 | return (0); |
499 | |
500 | out: |
501 | for (ix = 0; ix < path_alloced; ix++) { |
502 | kmem_free(cs->sc_cinfo[ix].ci_path, |
503 | cs->sc_cinfo[ix].ci_pathlen); |
504 | } |
505 | kmem_free(cs->sc_cinfo, cs->sc_nccdisks * sizeof(struct ccdcinfo)); |
506 | kmem_free(tmppath, MAXPATHLEN); |
507 | return (error); |
508 | } |
509 | |
510 | static void |
511 | ccdinterleave(struct ccd_softc *cs) |
512 | { |
513 | struct ccdcinfo *ci, *smallci; |
514 | struct ccdiinfo *ii; |
515 | daddr_t bn, lbn; |
516 | int ix; |
517 | u_long size; |
518 | |
519 | #ifdef DEBUG |
520 | if (ccddebug & CCDB_INIT) |
521 | printf("ccdinterleave(%p): ileave %d\n" , cs, cs->sc_ileave); |
522 | #endif |
523 | /* |
524 | * Allocate an interleave table. |
525 | * Chances are this is too big, but we don't care. |
526 | */ |
527 | size = (cs->sc_nccdisks + 1) * sizeof(struct ccdiinfo); |
528 | cs->sc_itable = kmem_zalloc(size, KM_SLEEP); |
529 | |
530 | /* |
531 | * Trivial case: no interleave (actually interleave of disk size). |
532 | * Each table entry represents a single component in its entirety. |
533 | */ |
534 | if (cs->sc_ileave == 0) { |
535 | bn = 0; |
536 | ii = cs->sc_itable; |
537 | |
538 | for (ix = 0; ix < cs->sc_nccdisks; ix++) { |
539 | /* Allocate space for ii_index. */ |
540 | ii->ii_indexsz = sizeof(int); |
541 | ii->ii_index = kmem_alloc(ii->ii_indexsz, KM_SLEEP); |
542 | ii->ii_ndisk = 1; |
543 | ii->ii_startblk = bn; |
544 | ii->ii_startoff = 0; |
545 | ii->ii_index[0] = ix; |
546 | bn += cs->sc_cinfo[ix].ci_size; |
547 | ii++; |
548 | } |
549 | ii->ii_ndisk = 0; |
550 | #ifdef DEBUG |
551 | if (ccddebug & CCDB_INIT) |
552 | printiinfo(cs->sc_itable); |
553 | #endif |
554 | return; |
555 | } |
556 | |
557 | /* |
558 | * The following isn't fast or pretty; it doesn't have to be. |
559 | */ |
560 | size = 0; |
561 | bn = lbn = 0; |
562 | for (ii = cs->sc_itable; ; ii++) { |
563 | /* Allocate space for ii_index. */ |
564 | ii->ii_indexsz = sizeof(int) * cs->sc_nccdisks; |
565 | ii->ii_index = kmem_alloc(ii->ii_indexsz, KM_SLEEP); |
566 | |
567 | /* |
568 | * Locate the smallest of the remaining components |
569 | */ |
570 | smallci = NULL; |
571 | for (ci = cs->sc_cinfo; |
572 | ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++) |
573 | if (ci->ci_size > size && |
574 | (smallci == NULL || |
575 | ci->ci_size < smallci->ci_size)) |
576 | smallci = ci; |
577 | |
578 | /* |
579 | * Nobody left, all done |
580 | */ |
581 | if (smallci == NULL) { |
582 | ii->ii_ndisk = 0; |
583 | break; |
584 | } |
585 | |
586 | /* |
587 | * Record starting logical block and component offset |
588 | */ |
589 | ii->ii_startblk = bn / cs->sc_ileave; |
590 | ii->ii_startoff = lbn; |
591 | |
592 | /* |
593 | * Determine how many disks take part in this interleave |
594 | * and record their indices. |
595 | */ |
596 | ix = 0; |
597 | for (ci = cs->sc_cinfo; |
598 | ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++) |
599 | if (ci->ci_size >= smallci->ci_size) |
600 | ii->ii_index[ix++] = ci - cs->sc_cinfo; |
601 | ii->ii_ndisk = ix; |
602 | bn += ix * (smallci->ci_size - size); |
603 | lbn = smallci->ci_size / cs->sc_ileave; |
604 | size = smallci->ci_size; |
605 | } |
606 | #ifdef DEBUG |
607 | if (ccddebug & CCDB_INIT) |
608 | printiinfo(cs->sc_itable); |
609 | #endif |
610 | } |
611 | |
612 | /* ARGSUSED */ |
613 | static int |
614 | ccdopen(dev_t dev, int flags, int fmt, struct lwp *l) |
615 | { |
616 | int unit = ccdunit(dev); |
617 | struct ccd_softc *cs; |
618 | struct disklabel *lp; |
619 | int error = 0, part, pmask; |
620 | |
621 | #ifdef DEBUG |
622 | if (ccddebug & CCDB_FOLLOW) |
623 | printf("ccdopen(0x%" PRIx64", 0x%x)\n" , dev, flags); |
624 | #endif |
625 | if ((cs = ccdget(unit, 1)) == NULL) |
626 | return ENXIO; |
627 | |
628 | mutex_enter(&cs->sc_dvlock); |
629 | |
630 | lp = cs->sc_dkdev.dk_label; |
631 | |
632 | part = DISKPART(dev); |
633 | pmask = (1 << part); |
634 | |
635 | /* |
636 | * If we're initialized, check to see if there are any other |
637 | * open partitions. If not, then it's safe to update |
638 | * the in-core disklabel. Only read the disklabel if it is |
639 | * not already valid. |
640 | */ |
641 | if ((cs->sc_flags & (CCDF_INITED|CCDF_VLABEL)) == CCDF_INITED && |
642 | cs->sc_dkdev.dk_openmask == 0) |
643 | ccdgetdisklabel(dev); |
644 | |
645 | /* Check that the partition exists. */ |
646 | if (part != RAW_PART) { |
647 | if (((cs->sc_flags & CCDF_INITED) == 0) || |
648 | ((part >= lp->d_npartitions) || |
649 | (lp->d_partitions[part].p_fstype == FS_UNUSED))) { |
650 | error = ENXIO; |
651 | goto done; |
652 | } |
653 | } |
654 | |
655 | /* Prevent our unit from being unconfigured while open. */ |
656 | switch (fmt) { |
657 | case S_IFCHR: |
658 | cs->sc_dkdev.dk_copenmask |= pmask; |
659 | break; |
660 | |
661 | case S_IFBLK: |
662 | cs->sc_dkdev.dk_bopenmask |= pmask; |
663 | break; |
664 | } |
665 | cs->sc_dkdev.dk_openmask = |
666 | cs->sc_dkdev.dk_copenmask | cs->sc_dkdev.dk_bopenmask; |
667 | |
668 | done: |
669 | mutex_exit(&cs->sc_dvlock); |
670 | return (error); |
671 | } |
672 | |
673 | /* ARGSUSED */ |
674 | static int |
675 | ccdclose(dev_t dev, int flags, int fmt, struct lwp *l) |
676 | { |
677 | int unit = ccdunit(dev); |
678 | struct ccd_softc *cs; |
679 | int part; |
680 | |
681 | #ifdef DEBUG |
682 | if (ccddebug & CCDB_FOLLOW) |
683 | printf("ccdclose(0x%" PRIx64", 0x%x)\n" , dev, flags); |
684 | #endif |
685 | |
686 | if ((cs = ccdget(unit, 0)) == NULL) |
687 | return ENXIO; |
688 | |
689 | mutex_enter(&cs->sc_dvlock); |
690 | |
691 | part = DISKPART(dev); |
692 | |
693 | /* ...that much closer to allowing unconfiguration... */ |
694 | switch (fmt) { |
695 | case S_IFCHR: |
696 | cs->sc_dkdev.dk_copenmask &= ~(1 << part); |
697 | break; |
698 | |
699 | case S_IFBLK: |
700 | cs->sc_dkdev.dk_bopenmask &= ~(1 << part); |
701 | break; |
702 | } |
703 | cs->sc_dkdev.dk_openmask = |
704 | cs->sc_dkdev.dk_copenmask | cs->sc_dkdev.dk_bopenmask; |
705 | |
706 | if (cs->sc_dkdev.dk_openmask == 0) { |
707 | if ((cs->sc_flags & CCDF_KLABEL) == 0) |
708 | cs->sc_flags &= ~CCDF_VLABEL; |
709 | } |
710 | |
711 | mutex_exit(&cs->sc_dvlock); |
712 | return (0); |
713 | } |
714 | |
715 | static bool |
716 | ccdbackoff(struct ccd_softc *cs) |
717 | { |
718 | |
719 | /* XXX Arbitrary, should be a uvm call. */ |
720 | return uvmexp.free < (uvmexp.freemin >> 1) && |
721 | disk_isbusy(&cs->sc_dkdev); |
722 | } |
723 | |
724 | static void |
725 | ccdthread(void *cookie) |
726 | { |
727 | struct ccd_softc *cs; |
728 | |
729 | cs = cookie; |
730 | |
731 | #ifdef DEBUG |
732 | if (ccddebug & CCDB_FOLLOW) |
733 | printf("ccdthread: hello\n" ); |
734 | #endif |
735 | |
736 | mutex_enter(cs->sc_iolock); |
737 | while (__predict_true(!cs->sc_zap)) { |
738 | if (bufq_peek(cs->sc_bufq) == NULL) { |
739 | /* Nothing to do. */ |
740 | cv_wait(&cs->sc_push, cs->sc_iolock); |
741 | continue; |
742 | } |
743 | if (ccdbackoff(cs)) { |
744 | /* Wait for memory to become available. */ |
745 | (void)cv_timedwait(&cs->sc_push, cs->sc_iolock, 1); |
746 | continue; |
747 | } |
748 | #ifdef DEBUG |
749 | if (ccddebug & CCDB_FOLLOW) |
750 | printf("ccdthread: dispatching I/O\n" ); |
751 | #endif |
752 | ccdstart(cs); |
753 | mutex_enter(cs->sc_iolock); |
754 | } |
755 | cs->sc_thread = NULL; |
756 | mutex_exit(cs->sc_iolock); |
757 | #ifdef DEBUG |
758 | if (ccddebug & CCDB_FOLLOW) |
759 | printf("ccdthread: goodbye\n" ); |
760 | #endif |
761 | kthread_exit(0); |
762 | } |
763 | |
764 | static void |
765 | ccdstrategy(struct buf *bp) |
766 | { |
767 | int unit = ccdunit(bp->b_dev); |
768 | struct ccd_softc *cs; |
769 | if ((cs = ccdget(unit, 0)) == NULL) |
770 | return; |
771 | |
772 | /* Must be open or reading label. */ |
773 | KASSERT(cs->sc_dkdev.dk_openmask != 0 || |
774 | (cs->sc_flags & CCDF_RLABEL) != 0); |
775 | |
776 | mutex_enter(cs->sc_iolock); |
777 | /* Synchronize with device init/uninit. */ |
778 | if (__predict_false((cs->sc_flags & CCDF_INITED) == 0)) { |
779 | mutex_exit(cs->sc_iolock); |
780 | #ifdef DEBUG |
781 | if (ccddebug & CCDB_FOLLOW) |
782 | printf("ccdstrategy: unit %d: not inited\n" , unit); |
783 | #endif |
784 | bp->b_error = ENXIO; |
785 | bp->b_resid = bp->b_bcount; |
786 | biodone(bp); |
787 | return; |
788 | } |
789 | |
790 | /* Defer to thread if system is low on memory. */ |
791 | bufq_put(cs->sc_bufq, bp); |
792 | if (__predict_false(ccdbackoff(cs))) { |
793 | mutex_exit(cs->sc_iolock); |
794 | #ifdef DEBUG |
795 | if (ccddebug & CCDB_FOLLOW) |
796 | printf("ccdstrategy: holding off on I/O\n" ); |
797 | #endif |
798 | return; |
799 | } |
800 | ccdstart(cs); |
801 | } |
802 | |
803 | static void |
804 | ccdstart(struct ccd_softc *cs) |
805 | { |
806 | daddr_t blkno; |
807 | int wlabel; |
808 | struct disklabel *lp; |
809 | long bcount, rcount; |
810 | struct ccdbuf *cbp; |
811 | char *addr; |
812 | daddr_t bn; |
813 | vnode_t *vp; |
814 | buf_t *bp; |
815 | |
816 | KASSERT(mutex_owned(cs->sc_iolock)); |
817 | |
818 | disk_busy(&cs->sc_dkdev); |
819 | bp = bufq_get(cs->sc_bufq); |
820 | KASSERT(bp != NULL); |
821 | |
822 | #ifdef DEBUG |
823 | if (ccddebug & CCDB_FOLLOW) |
824 | printf("ccdstart(%s, %p)\n" , cs->sc_xname, bp); |
825 | #endif |
826 | |
827 | /* If it's a nil transfer, wake up the top half now. */ |
828 | if (bp->b_bcount == 0) |
829 | goto done; |
830 | |
831 | lp = cs->sc_dkdev.dk_label; |
832 | |
833 | /* |
834 | * Do bounds checking and adjust transfer. If there's an |
835 | * error, the bounds check will flag that for us. Convert |
836 | * the partition relative block number to an absolute. |
837 | */ |
838 | blkno = bp->b_blkno; |
839 | wlabel = cs->sc_flags & (CCDF_WLABEL|CCDF_LABELLING); |
840 | if (DISKPART(bp->b_dev) != RAW_PART) { |
841 | if (bounds_check_with_label(&cs->sc_dkdev, bp, wlabel) <= 0) |
842 | goto done; |
843 | blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; |
844 | } |
845 | mutex_exit(cs->sc_iolock); |
846 | bp->b_rawblkno = blkno; |
847 | |
848 | /* Allocate the component buffers and start I/O! */ |
849 | bp->b_resid = bp->b_bcount; |
850 | bn = bp->b_rawblkno; |
851 | addr = bp->b_data; |
852 | for (bcount = bp->b_bcount; bcount > 0; bcount -= rcount) { |
853 | cbp = ccdbuffer(cs, bp, bn, addr, bcount); |
854 | rcount = cbp->cb_buf.b_bcount; |
855 | bn += btodb(rcount); |
856 | addr += rcount; |
857 | vp = cbp->cb_buf.b_vp; |
858 | if ((cbp->cb_buf.b_flags & B_READ) == 0) { |
859 | mutex_enter(vp->v_interlock); |
860 | vp->v_numoutput++; |
861 | mutex_exit(vp->v_interlock); |
862 | } |
863 | (void)VOP_STRATEGY(vp, &cbp->cb_buf); |
864 | } |
865 | return; |
866 | |
867 | done: |
868 | disk_unbusy(&cs->sc_dkdev, 0, 0); |
869 | cv_broadcast(&cs->sc_stop); |
870 | cv_broadcast(&cs->sc_push); |
871 | mutex_exit(cs->sc_iolock); |
872 | bp->b_resid = bp->b_bcount; |
873 | biodone(bp); |
874 | } |
875 | |
876 | /* |
877 | * Build a component buffer header. |
878 | */ |
879 | static struct ccdbuf * |
880 | ccdbuffer(struct ccd_softc *cs, struct buf *bp, daddr_t bn, void *addr, |
881 | long bcount) |
882 | { |
883 | struct ccdcinfo *ci; |
884 | struct ccdbuf *cbp; |
885 | daddr_t cbn, cboff; |
886 | u_int64_t cbc; |
887 | int ccdisk; |
888 | |
889 | #ifdef DEBUG |
890 | if (ccddebug & CCDB_IO) |
891 | printf("ccdbuffer(%p, %p, %" PRId64 ", %p, %ld)\n" , |
892 | cs, bp, bn, addr, bcount); |
893 | #endif |
894 | /* |
895 | * Determine which component bn falls in. |
896 | */ |
897 | cbn = bn; |
898 | cboff = 0; |
899 | |
900 | /* |
901 | * Serially concatenated |
902 | */ |
903 | if (cs->sc_ileave == 0) { |
904 | daddr_t sblk; |
905 | |
906 | sblk = 0; |
907 | for (ccdisk = 0, ci = &cs->sc_cinfo[ccdisk]; |
908 | cbn >= sblk + ci->ci_size; |
909 | ccdisk++, ci = &cs->sc_cinfo[ccdisk]) |
910 | sblk += ci->ci_size; |
911 | cbn -= sblk; |
912 | } |
913 | /* |
914 | * Interleaved |
915 | */ |
916 | else { |
917 | struct ccdiinfo *ii; |
918 | int off; |
919 | |
920 | cboff = cbn % cs->sc_ileave; |
921 | cbn /= cs->sc_ileave; |
922 | for (ii = cs->sc_itable; ii->ii_ndisk; ii++) |
923 | if (ii->ii_startblk > cbn) |
924 | break; |
925 | ii--; |
926 | off = cbn - ii->ii_startblk; |
927 | if (ii->ii_ndisk == 1) { |
928 | ccdisk = ii->ii_index[0]; |
929 | cbn = ii->ii_startoff + off; |
930 | } else { |
931 | ccdisk = ii->ii_index[off % ii->ii_ndisk]; |
932 | cbn = ii->ii_startoff + off / ii->ii_ndisk; |
933 | } |
934 | cbn *= cs->sc_ileave; |
935 | ci = &cs->sc_cinfo[ccdisk]; |
936 | } |
937 | |
938 | /* |
939 | * Fill in the component buf structure. |
940 | */ |
941 | cbp = CCD_GETBUF(); |
942 | KASSERT(cbp != NULL); |
943 | buf_init(&cbp->cb_buf); |
944 | cbp->cb_buf.b_flags = bp->b_flags; |
945 | cbp->cb_buf.b_oflags = bp->b_oflags; |
946 | cbp->cb_buf.b_cflags = bp->b_cflags; |
947 | cbp->cb_buf.b_iodone = ccdiodone; |
948 | cbp->cb_buf.b_proc = bp->b_proc; |
949 | cbp->cb_buf.b_dev = ci->ci_dev; |
950 | cbp->cb_buf.b_blkno = cbn + cboff; |
951 | cbp->cb_buf.b_data = addr; |
952 | cbp->cb_buf.b_vp = ci->ci_vp; |
953 | cbp->cb_buf.b_objlock = ci->ci_vp->v_interlock; |
954 | if (cs->sc_ileave == 0) |
955 | cbc = dbtob((u_int64_t)(ci->ci_size - cbn)); |
956 | else |
957 | cbc = dbtob((u_int64_t)(cs->sc_ileave - cboff)); |
958 | cbp->cb_buf.b_bcount = cbc < bcount ? cbc : bcount; |
959 | |
960 | /* |
961 | * context for ccdiodone |
962 | */ |
963 | cbp->cb_obp = bp; |
964 | cbp->cb_sc = cs; |
965 | cbp->cb_comp = ccdisk; |
966 | |
967 | BIO_COPYPRIO(&cbp->cb_buf, bp); |
968 | |
969 | #ifdef DEBUG |
970 | if (ccddebug & CCDB_IO) |
971 | printf(" dev 0x%" PRIx64"(u%lu): cbp %p bn %" PRId64 " addr %p" |
972 | " bcnt %d\n" , |
973 | ci->ci_dev, (unsigned long) (ci-cs->sc_cinfo), cbp, |
974 | cbp->cb_buf.b_blkno, cbp->cb_buf.b_data, |
975 | cbp->cb_buf.b_bcount); |
976 | #endif |
977 | |
978 | return (cbp); |
979 | } |
980 | |
981 | /* |
982 | * Called at interrupt time. |
983 | * Mark the component as done and if all components are done, |
984 | * take a ccd interrupt. |
985 | */ |
986 | static void |
987 | ccdiodone(struct buf *vbp) |
988 | { |
989 | struct ccdbuf *cbp = (struct ccdbuf *) vbp; |
990 | struct buf *bp = cbp->cb_obp; |
991 | struct ccd_softc *cs = cbp->cb_sc; |
992 | int count; |
993 | |
994 | #ifdef DEBUG |
995 | if (ccddebug & CCDB_FOLLOW) |
996 | printf("ccdiodone(%p)\n" , cbp); |
997 | if (ccddebug & CCDB_IO) { |
998 | printf("ccdiodone: bp %p bcount %d resid %d\n" , |
999 | bp, bp->b_bcount, bp->b_resid); |
1000 | printf(" dev 0x%" PRIx64"(u%d), cbp %p bn %" PRId64 " addr %p" |
1001 | " bcnt %d\n" , |
1002 | cbp->cb_buf.b_dev, cbp->cb_comp, cbp, |
1003 | cbp->cb_buf.b_blkno, cbp->cb_buf.b_data, |
1004 | cbp->cb_buf.b_bcount); |
1005 | } |
1006 | #endif |
1007 | |
1008 | if (cbp->cb_buf.b_error != 0) { |
1009 | bp->b_error = cbp->cb_buf.b_error; |
1010 | printf("%s: error %d on component %d\n" , |
1011 | cs->sc_xname, bp->b_error, cbp->cb_comp); |
1012 | } |
1013 | count = cbp->cb_buf.b_bcount; |
1014 | buf_destroy(&cbp->cb_buf); |
1015 | CCD_PUTBUF(cbp); |
1016 | |
1017 | /* |
1018 | * If all done, "interrupt". |
1019 | */ |
1020 | mutex_enter(cs->sc_iolock); |
1021 | bp->b_resid -= count; |
1022 | if (bp->b_resid < 0) |
1023 | panic("ccdiodone: count" ); |
1024 | if (bp->b_resid == 0) { |
1025 | /* |
1026 | * Request is done for better or worse, wakeup the top half. |
1027 | */ |
1028 | if (bp->b_error != 0) |
1029 | bp->b_resid = bp->b_bcount; |
1030 | disk_unbusy(&cs->sc_dkdev, (bp->b_bcount - bp->b_resid), |
1031 | (bp->b_flags & B_READ)); |
1032 | if (!disk_isbusy(&cs->sc_dkdev)) { |
1033 | if (bufq_peek(cs->sc_bufq) != NULL) { |
1034 | cv_broadcast(&cs->sc_push); |
1035 | } |
1036 | cv_broadcast(&cs->sc_stop); |
1037 | } |
1038 | mutex_exit(cs->sc_iolock); |
1039 | biodone(bp); |
1040 | } else |
1041 | mutex_exit(cs->sc_iolock); |
1042 | } |
1043 | |
1044 | /* ARGSUSED */ |
1045 | static int |
1046 | ccdread(dev_t dev, struct uio *uio, int flags) |
1047 | { |
1048 | int unit = ccdunit(dev); |
1049 | struct ccd_softc *cs; |
1050 | |
1051 | #ifdef DEBUG |
1052 | if (ccddebug & CCDB_FOLLOW) |
1053 | printf("ccdread(0x%" PRIx64", %p)\n" , dev, uio); |
1054 | #endif |
1055 | if ((cs = ccdget(unit, 0)) == NULL) |
1056 | return 0; |
1057 | |
1058 | /* Unlocked advisory check, ccdstrategy check is synchronous. */ |
1059 | if ((cs->sc_flags & CCDF_INITED) == 0) |
1060 | return (ENXIO); |
1061 | |
1062 | return (physio(ccdstrategy, NULL, dev, B_READ, minphys, uio)); |
1063 | } |
1064 | |
1065 | /* ARGSUSED */ |
1066 | static int |
1067 | ccdwrite(dev_t dev, struct uio *uio, int flags) |
1068 | { |
1069 | int unit = ccdunit(dev); |
1070 | struct ccd_softc *cs; |
1071 | |
1072 | #ifdef DEBUG |
1073 | if (ccddebug & CCDB_FOLLOW) |
1074 | printf("ccdwrite(0x%" PRIx64", %p)\n" , dev, uio); |
1075 | #endif |
1076 | if ((cs = ccdget(unit, 0)) == NULL) |
1077 | return ENOENT; |
1078 | |
1079 | /* Unlocked advisory check, ccdstrategy check is synchronous. */ |
1080 | if ((cs->sc_flags & CCDF_INITED) == 0) |
1081 | return (ENXIO); |
1082 | |
1083 | return (physio(ccdstrategy, NULL, dev, B_WRITE, minphys, uio)); |
1084 | } |
1085 | |
1086 | static int |
1087 | ccdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) |
1088 | { |
1089 | int unit = ccdunit(dev); |
1090 | int i, j, lookedup = 0, error = 0; |
1091 | int part, pmask, make; |
1092 | struct ccd_softc *cs; |
1093 | struct ccd_ioctl *ccio = (struct ccd_ioctl *)data; |
1094 | kauth_cred_t uc; |
1095 | char **cpp; |
1096 | struct pathbuf *pb; |
1097 | struct vnode **vpp; |
1098 | #ifdef __HAVE_OLD_DISKLABEL |
1099 | struct disklabel newlabel; |
1100 | #endif |
1101 | |
1102 | switch (cmd) { |
1103 | #if defined(COMPAT_60) && !defined(_LP64) |
1104 | case CCDIOCSET_60: |
1105 | #endif |
1106 | case CCDIOCSET: |
1107 | make = 1; |
1108 | break; |
1109 | default: |
1110 | make = 0; |
1111 | break; |
1112 | } |
1113 | |
1114 | if ((cs = ccdget(unit, make)) == NULL) |
1115 | return ENOENT; |
1116 | uc = kauth_cred_get(); |
1117 | |
1118 | /* |
1119 | * Compat code must not be called if on a platform where |
1120 | * sizeof (size_t) == sizeof (uint64_t) as CCDIOCSET will |
1121 | * be the same as CCDIOCSET_60 |
1122 | */ |
1123 | #if defined(COMPAT_60) && !defined(_LP64) |
1124 | switch (cmd) { |
1125 | case CCDIOCSET_60: { |
1126 | struct ccd_ioctl ccionew; |
1127 | struct ccd_ioctl_60 *ccio60 = |
1128 | (struct ccd_ioctl_60 *)data; |
1129 | ccionew.ccio_disks = ccio->ccio_disks; |
1130 | ccionew.ccio_ndisks = ccio->ccio_ndisks; |
1131 | ccionew.ccio_ileave = ccio->ccio_ileave; |
1132 | ccionew.ccio_flags = ccio->ccio_flags; |
1133 | ccionew.ccio_unit = ccio->ccio_unit; |
1134 | error = ccdioctl(dev, CCDIOCSET, &ccionew, flag, l); |
1135 | if (!error) { |
1136 | /* Copy data back, adjust types if necessary */ |
1137 | ccio60->ccio_disks = ccionew.ccio_disks; |
1138 | ccio60->ccio_ndisks = ccionew.ccio_ndisks; |
1139 | ccio60->ccio_ileave = ccionew.ccio_ileave; |
1140 | ccio60->ccio_flags = ccionew.ccio_flags; |
1141 | ccio60->ccio_unit = ccionew.ccio_unit; |
1142 | ccio60->ccio_size = (size_t)ccionew.ccio_size; |
1143 | } |
1144 | return error; |
1145 | } |
1146 | break; |
1147 | |
1148 | case CCDIOCCLR_60: |
1149 | /* |
1150 | * ccio_size member not used, so existing struct OK |
1151 | * drop through to existing non-compat version |
1152 | */ |
1153 | cmd = CCDIOCCLR; |
1154 | break; |
1155 | } |
1156 | #endif /* COMPAT_60 && !_LP64*/ |
1157 | |
1158 | /* Must be open for writes for these commands... */ |
1159 | switch (cmd) { |
1160 | case CCDIOCSET: |
1161 | case CCDIOCCLR: |
1162 | case DIOCSDINFO: |
1163 | case DIOCWDINFO: |
1164 | case DIOCCACHESYNC: |
1165 | case DIOCAWEDGE: |
1166 | case DIOCDWEDGE: |
1167 | case DIOCMWEDGES: |
1168 | #ifdef __HAVE_OLD_DISKLABEL |
1169 | case ODIOCSDINFO: |
1170 | case ODIOCWDINFO: |
1171 | #endif |
1172 | case DIOCKLABEL: |
1173 | case DIOCWLABEL: |
1174 | if ((flag & FWRITE) == 0) |
1175 | return (EBADF); |
1176 | } |
1177 | |
1178 | mutex_enter(&cs->sc_dvlock); |
1179 | |
1180 | /* Must be initialized for these... */ |
1181 | switch (cmd) { |
1182 | case CCDIOCCLR: |
1183 | case DIOCGDINFO: |
1184 | case DIOCCACHESYNC: |
1185 | case DIOCAWEDGE: |
1186 | case DIOCDWEDGE: |
1187 | case DIOCLWEDGES: |
1188 | case DIOCMWEDGES: |
1189 | case DIOCSDINFO: |
1190 | case DIOCWDINFO: |
1191 | case DIOCGPARTINFO: |
1192 | case DIOCWLABEL: |
1193 | case DIOCKLABEL: |
1194 | case DIOCGDEFLABEL: |
1195 | #ifdef __HAVE_OLD_DISKLABEL |
1196 | case ODIOCGDINFO: |
1197 | case ODIOCSDINFO: |
1198 | case ODIOCWDINFO: |
1199 | case ODIOCGDEFLABEL: |
1200 | #endif |
1201 | if ((cs->sc_flags & CCDF_INITED) == 0) { |
1202 | error = ENXIO; |
1203 | goto out; |
1204 | } |
1205 | } |
1206 | |
1207 | error = disk_ioctl(&cs->sc_dkdev, dev, cmd, data, flag, l); |
1208 | if (error != EPASSTHROUGH) |
1209 | goto out; |
1210 | |
1211 | error = 0; |
1212 | switch (cmd) { |
1213 | case CCDIOCSET: |
1214 | if (cs->sc_flags & CCDF_INITED) { |
1215 | error = EBUSY; |
1216 | goto out; |
1217 | } |
1218 | |
1219 | /* Validate the flags. */ |
1220 | if ((ccio->ccio_flags & CCDF_USERMASK) != ccio->ccio_flags) { |
1221 | error = EINVAL; |
1222 | goto out; |
1223 | } |
1224 | |
1225 | if (ccio->ccio_ndisks > CCD_MAXNDISKS || |
1226 | ccio->ccio_ndisks == 0) { |
1227 | error = EINVAL; |
1228 | goto out; |
1229 | } |
1230 | |
1231 | /* Fill in some important bits. */ |
1232 | cs->sc_ileave = ccio->ccio_ileave; |
1233 | cs->sc_nccdisks = ccio->ccio_ndisks; |
1234 | cs->sc_flags = ccio->ccio_flags & CCDF_USERMASK; |
1235 | |
1236 | /* |
1237 | * Allocate space for and copy in the array of |
1238 | * component pathnames and device numbers. |
1239 | */ |
1240 | cpp = kmem_alloc(ccio->ccio_ndisks * sizeof(*cpp), KM_SLEEP); |
1241 | vpp = kmem_alloc(ccio->ccio_ndisks * sizeof(*vpp), KM_SLEEP); |
1242 | error = copyin(ccio->ccio_disks, cpp, |
1243 | ccio->ccio_ndisks * sizeof(*cpp)); |
1244 | if (error) { |
1245 | kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp)); |
1246 | kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp)); |
1247 | goto out; |
1248 | } |
1249 | |
1250 | #ifdef DEBUG |
1251 | if (ccddebug & CCDB_INIT) |
1252 | for (i = 0; i < ccio->ccio_ndisks; ++i) |
1253 | printf("ccdioctl: component %d: %p\n" , |
1254 | i, cpp[i]); |
1255 | #endif |
1256 | |
1257 | for (i = 0; i < ccio->ccio_ndisks; ++i) { |
1258 | #ifdef DEBUG |
1259 | if (ccddebug & CCDB_INIT) |
1260 | printf("ccdioctl: lookedup = %d\n" , lookedup); |
1261 | #endif |
1262 | error = pathbuf_copyin(cpp[i], &pb); |
1263 | if (error == 0) { |
1264 | error = dk_lookup(pb, l, &vpp[i]); |
1265 | } |
1266 | pathbuf_destroy(pb); |
1267 | if (error != 0) { |
1268 | for (j = 0; j < lookedup; ++j) |
1269 | (void)vn_close(vpp[j], FREAD|FWRITE, |
1270 | uc); |
1271 | kmem_free(vpp, ccio->ccio_ndisks * |
1272 | sizeof(*vpp)); |
1273 | kmem_free(cpp, ccio->ccio_ndisks * |
1274 | sizeof(*cpp)); |
1275 | goto out; |
1276 | } |
1277 | ++lookedup; |
1278 | } |
1279 | |
1280 | /* Attach the disk. */ |
1281 | disk_attach(&cs->sc_dkdev); |
1282 | bufq_alloc(&cs->sc_bufq, "fcfs" , 0); |
1283 | |
1284 | /* |
1285 | * Initialize the ccd. Fills in the softc for us. |
1286 | */ |
1287 | if ((error = ccdinit(cs, cpp, vpp, l)) != 0) { |
1288 | for (j = 0; j < lookedup; ++j) |
1289 | (void)vn_close(vpp[j], FREAD|FWRITE, |
1290 | uc); |
1291 | kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp)); |
1292 | kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp)); |
1293 | disk_detach(&cs->sc_dkdev); |
1294 | mutex_exit(&cs->sc_dvlock); |
1295 | bufq_free(cs->sc_bufq); |
1296 | return error; |
1297 | } |
1298 | |
1299 | /* We can free the temporary variables now. */ |
1300 | kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp)); |
1301 | kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp)); |
1302 | |
1303 | /* |
1304 | * The ccd has been successfully initialized, so |
1305 | * we can place it into the array. Don't try to |
1306 | * read the disklabel until the disk has been attached, |
1307 | * because space for the disklabel is allocated |
1308 | * in disk_attach(); |
1309 | */ |
1310 | ccio->ccio_unit = unit; |
1311 | ccio->ccio_size = cs->sc_size; |
1312 | |
1313 | /* Try and read the disklabel. */ |
1314 | ccdgetdisklabel(dev); |
1315 | disk_set_info(NULL, &cs->sc_dkdev, NULL); |
1316 | |
1317 | /* discover wedges */ |
1318 | mutex_exit(&cs->sc_dvlock); |
1319 | dkwedge_discover(&cs->sc_dkdev); |
1320 | return 0; |
1321 | |
1322 | case CCDIOCCLR: |
1323 | /* |
1324 | * Don't unconfigure if any other partitions are open |
1325 | * or if both the character and block flavors of this |
1326 | * partition are open. |
1327 | */ |
1328 | part = DISKPART(dev); |
1329 | pmask = (1 << part); |
1330 | if ((cs->sc_dkdev.dk_openmask & ~pmask) || |
1331 | ((cs->sc_dkdev.dk_bopenmask & pmask) && |
1332 | (cs->sc_dkdev.dk_copenmask & pmask))) { |
1333 | error = EBUSY; |
1334 | goto out; |
1335 | } |
1336 | |
1337 | /* Delete all of our wedges. */ |
1338 | dkwedge_delall(&cs->sc_dkdev); |
1339 | |
1340 | /* Stop new I/O, wait for in-flight I/O to complete. */ |
1341 | mutex_enter(cs->sc_iolock); |
1342 | cs->sc_flags &= ~(CCDF_INITED|CCDF_VLABEL); |
1343 | cs->sc_zap = true; |
1344 | while (disk_isbusy(&cs->sc_dkdev) || |
1345 | bufq_peek(cs->sc_bufq) != NULL || |
1346 | cs->sc_thread != NULL) { |
1347 | cv_broadcast(&cs->sc_push); |
1348 | (void)cv_timedwait(&cs->sc_stop, cs->sc_iolock, hz); |
1349 | } |
1350 | mutex_exit(cs->sc_iolock); |
1351 | |
1352 | /* |
1353 | * Free ccd_softc information and clear entry. |
1354 | */ |
1355 | |
1356 | /* Close the components and free their pathnames. */ |
1357 | for (i = 0; i < cs->sc_nccdisks; ++i) { |
1358 | /* |
1359 | * XXX: this close could potentially fail and |
1360 | * cause Bad Things. Maybe we need to force |
1361 | * the close to happen? |
1362 | */ |
1363 | #ifdef DEBUG |
1364 | if (ccddebug & CCDB_VNODE) |
1365 | vprint("CCDIOCCLR: vnode info" , |
1366 | cs->sc_cinfo[i].ci_vp); |
1367 | #endif |
1368 | (void)vn_close(cs->sc_cinfo[i].ci_vp, FREAD|FWRITE, |
1369 | uc); |
1370 | kmem_free(cs->sc_cinfo[i].ci_path, |
1371 | cs->sc_cinfo[i].ci_pathlen); |
1372 | } |
1373 | |
1374 | /* Free interleave index. */ |
1375 | for (i = 0; cs->sc_itable[i].ii_ndisk; ++i) { |
1376 | kmem_free(cs->sc_itable[i].ii_index, |
1377 | cs->sc_itable[i].ii_indexsz); |
1378 | } |
1379 | |
1380 | /* Free component info and interleave table. */ |
1381 | kmem_free(cs->sc_cinfo, cs->sc_nccdisks * |
1382 | sizeof(struct ccdcinfo)); |
1383 | kmem_free(cs->sc_itable, (cs->sc_nccdisks + 1) * |
1384 | sizeof(struct ccdiinfo)); |
1385 | |
1386 | aprint_normal("%s: detached\n" , cs->sc_xname); |
1387 | |
1388 | /* Detach the disk. */ |
1389 | disk_detach(&cs->sc_dkdev); |
1390 | bufq_free(cs->sc_bufq); |
1391 | ccdput(cs); |
1392 | /* Don't break, otherwise cs is read again. */ |
1393 | return 0; |
1394 | |
1395 | case DIOCCACHESYNC: |
1396 | /* |
1397 | * We pass this call down to all components and report |
1398 | * the first error we encounter. |
1399 | */ |
1400 | for (error = 0, i = 0; i < cs->sc_nccdisks; i++) { |
1401 | j = VOP_IOCTL(cs->sc_cinfo[i].ci_vp, cmd, data, |
1402 | flag, uc); |
1403 | if (j != 0 && error == 0) |
1404 | error = j; |
1405 | } |
1406 | break; |
1407 | |
1408 | case DIOCWDINFO: |
1409 | case DIOCSDINFO: |
1410 | #ifdef __HAVE_OLD_DISKLABEL |
1411 | case ODIOCWDINFO: |
1412 | case ODIOCSDINFO: |
1413 | #endif |
1414 | { |
1415 | struct disklabel *lp; |
1416 | #ifdef __HAVE_OLD_DISKLABEL |
1417 | if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) { |
1418 | memset(&newlabel, 0, sizeof newlabel); |
1419 | memcpy(&newlabel, data, sizeof (struct olddisklabel)); |
1420 | lp = &newlabel; |
1421 | } else |
1422 | #endif |
1423 | lp = (struct disklabel *)data; |
1424 | |
1425 | cs->sc_flags |= CCDF_LABELLING; |
1426 | |
1427 | error = setdisklabel(cs->sc_dkdev.dk_label, |
1428 | lp, 0, cs->sc_dkdev.dk_cpulabel); |
1429 | if (error == 0) { |
1430 | if (cmd == DIOCWDINFO |
1431 | #ifdef __HAVE_OLD_DISKLABEL |
1432 | || cmd == ODIOCWDINFO |
1433 | #endif |
1434 | ) |
1435 | error = writedisklabel(CCDLABELDEV(dev), |
1436 | ccdstrategy, cs->sc_dkdev.dk_label, |
1437 | cs->sc_dkdev.dk_cpulabel); |
1438 | } |
1439 | |
1440 | cs->sc_flags &= ~CCDF_LABELLING; |
1441 | break; |
1442 | } |
1443 | |
1444 | case DIOCKLABEL: |
1445 | if (*(int *)data != 0) |
1446 | cs->sc_flags |= CCDF_KLABEL; |
1447 | else |
1448 | cs->sc_flags &= ~CCDF_KLABEL; |
1449 | break; |
1450 | |
1451 | case DIOCWLABEL: |
1452 | if (*(int *)data != 0) |
1453 | cs->sc_flags |= CCDF_WLABEL; |
1454 | else |
1455 | cs->sc_flags &= ~CCDF_WLABEL; |
1456 | break; |
1457 | |
1458 | case DIOCGDEFLABEL: |
1459 | ccdgetdefaultlabel(cs, (struct disklabel *)data); |
1460 | break; |
1461 | |
1462 | #ifdef __HAVE_OLD_DISKLABEL |
1463 | case ODIOCGDEFLABEL: |
1464 | ccdgetdefaultlabel(cs, &newlabel); |
1465 | if (newlabel.d_npartitions > OLDMAXPARTITIONS) |
1466 | return ENOTTY; |
1467 | memcpy(data, &newlabel, sizeof (struct olddisklabel)); |
1468 | break; |
1469 | #endif |
1470 | |
1471 | default: |
1472 | error = ENOTTY; |
1473 | } |
1474 | |
1475 | out: |
1476 | mutex_exit(&cs->sc_dvlock); |
1477 | return (error); |
1478 | } |
1479 | |
1480 | static int |
1481 | ccdsize(dev_t dev) |
1482 | { |
1483 | struct ccd_softc *cs; |
1484 | struct disklabel *lp; |
1485 | int part, unit, omask, size; |
1486 | |
1487 | unit = ccdunit(dev); |
1488 | if ((cs = ccdget(unit, 0)) == NULL) |
1489 | return -1; |
1490 | |
1491 | if ((cs->sc_flags & CCDF_INITED) == 0) |
1492 | return (-1); |
1493 | |
1494 | part = DISKPART(dev); |
1495 | omask = cs->sc_dkdev.dk_openmask & (1 << part); |
1496 | lp = cs->sc_dkdev.dk_label; |
1497 | |
1498 | if (omask == 0 && ccdopen(dev, 0, S_IFBLK, curlwp)) |
1499 | return (-1); |
1500 | |
1501 | if (lp->d_partitions[part].p_fstype != FS_SWAP) |
1502 | size = -1; |
1503 | else |
1504 | size = lp->d_partitions[part].p_size * |
1505 | (lp->d_secsize / DEV_BSIZE); |
1506 | |
1507 | if (omask == 0 && ccdclose(dev, 0, S_IFBLK, curlwp)) |
1508 | return (-1); |
1509 | |
1510 | return (size); |
1511 | } |
1512 | |
1513 | static void |
1514 | ccdgetdefaultlabel(struct ccd_softc *cs, struct disklabel *lp) |
1515 | { |
1516 | struct ccdgeom *ccg = &cs->sc_geom; |
1517 | |
1518 | memset(lp, 0, sizeof(*lp)); |
1519 | |
1520 | if (cs->sc_size > UINT32_MAX) |
1521 | lp->d_secperunit = UINT32_MAX; |
1522 | else |
1523 | lp->d_secperunit = cs->sc_size; |
1524 | lp->d_secsize = ccg->ccg_secsize; |
1525 | lp->d_nsectors = ccg->ccg_nsectors; |
1526 | lp->d_ntracks = ccg->ccg_ntracks; |
1527 | lp->d_ncylinders = ccg->ccg_ncylinders; |
1528 | lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; |
1529 | |
1530 | strncpy(lp->d_typename, "ccd" , sizeof(lp->d_typename)); |
1531 | lp->d_type = DKTYPE_CCD; |
1532 | strncpy(lp->d_packname, "fictitious" , sizeof(lp->d_packname)); |
1533 | lp->d_rpm = 3600; |
1534 | lp->d_interleave = 1; |
1535 | lp->d_flags = 0; |
1536 | |
1537 | lp->d_partitions[RAW_PART].p_offset = 0; |
1538 | lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; |
1539 | lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; |
1540 | lp->d_npartitions = RAW_PART + 1; |
1541 | |
1542 | lp->d_magic = DISKMAGIC; |
1543 | lp->d_magic2 = DISKMAGIC; |
1544 | lp->d_checksum = dkcksum(cs->sc_dkdev.dk_label); |
1545 | } |
1546 | |
1547 | /* |
1548 | * Read the disklabel from the ccd. If one is not present, fake one |
1549 | * up. |
1550 | */ |
1551 | static void |
1552 | ccdgetdisklabel(dev_t dev) |
1553 | { |
1554 | int unit = ccdunit(dev); |
1555 | struct ccd_softc *cs; |
1556 | const char *errstring; |
1557 | struct disklabel *lp; |
1558 | struct cpu_disklabel *clp; |
1559 | |
1560 | if ((cs = ccdget(unit, 0)) == NULL) |
1561 | return; |
1562 | lp = cs->sc_dkdev.dk_label; |
1563 | clp = cs->sc_dkdev.dk_cpulabel; |
1564 | KASSERT(mutex_owned(&cs->sc_dvlock)); |
1565 | |
1566 | memset(clp, 0, sizeof(*clp)); |
1567 | |
1568 | ccdgetdefaultlabel(cs, lp); |
1569 | |
1570 | /* |
1571 | * Call the generic disklabel extraction routine. |
1572 | */ |
1573 | cs->sc_flags |= CCDF_RLABEL; |
1574 | if ((cs->sc_flags & CCDF_NOLABEL) != 0) |
1575 | errstring = "CCDF_NOLABEL set; ignoring on-disk label" ; |
1576 | else |
1577 | errstring = readdisklabel(CCDLABELDEV(dev), ccdstrategy, |
1578 | cs->sc_dkdev.dk_label, cs->sc_dkdev.dk_cpulabel); |
1579 | if (errstring) |
1580 | ccdmakedisklabel(cs); |
1581 | else { |
1582 | int i; |
1583 | struct partition *pp; |
1584 | |
1585 | /* |
1586 | * Sanity check whether the found disklabel is valid. |
1587 | * |
1588 | * This is necessary since total size of ccd may vary |
1589 | * when an interleave is changed even though exactly |
1590 | * same componets are used, and old disklabel may used |
1591 | * if that is found. |
1592 | */ |
1593 | if (lp->d_secperunit < UINT32_MAX ? |
1594 | lp->d_secperunit != cs->sc_size : |
1595 | lp->d_secperunit > cs->sc_size) |
1596 | printf("WARNING: %s: " |
1597 | "total sector size in disklabel (%ju) != " |
1598 | "the size of ccd (%ju)\n" , cs->sc_xname, |
1599 | (uintmax_t)lp->d_secperunit, |
1600 | (uintmax_t)cs->sc_size); |
1601 | for (i = 0; i < lp->d_npartitions; i++) { |
1602 | pp = &lp->d_partitions[i]; |
1603 | if (pp->p_offset + pp->p_size > cs->sc_size) |
1604 | printf("WARNING: %s: end of partition `%c' " |
1605 | "exceeds the size of ccd (%ju)\n" , |
1606 | cs->sc_xname, 'a' + i, (uintmax_t)cs->sc_size); |
1607 | } |
1608 | } |
1609 | |
1610 | #ifdef DEBUG |
1611 | /* It's actually extremely common to have unlabeled ccds. */ |
1612 | if (ccddebug & CCDB_LABEL) |
1613 | if (errstring != NULL) |
1614 | printf("%s: %s\n" , cs->sc_xname, errstring); |
1615 | #endif |
1616 | |
1617 | /* In-core label now valid. */ |
1618 | cs->sc_flags = (cs->sc_flags | CCDF_VLABEL) & ~CCDF_RLABEL; |
1619 | } |
1620 | |
1621 | /* |
1622 | * Take care of things one might want to take care of in the event |
1623 | * that a disklabel isn't present. |
1624 | */ |
1625 | static void |
1626 | ccdmakedisklabel(struct ccd_softc *cs) |
1627 | { |
1628 | struct disklabel *lp = cs->sc_dkdev.dk_label; |
1629 | |
1630 | /* |
1631 | * For historical reasons, if there's no disklabel present |
1632 | * the raw partition must be marked FS_BSDFFS. |
1633 | */ |
1634 | lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS; |
1635 | |
1636 | strncpy(lp->d_packname, "default label" , sizeof(lp->d_packname)); |
1637 | |
1638 | lp->d_checksum = dkcksum(lp); |
1639 | } |
1640 | |
1641 | #ifdef DEBUG |
1642 | static void |
1643 | printiinfo(struct ccdiinfo *ii) |
1644 | { |
1645 | int ix, i; |
1646 | |
1647 | for (ix = 0; ii->ii_ndisk; ix++, ii++) { |
1648 | printf(" itab[%d]: #dk %d sblk %" PRId64 " soff %" PRId64, |
1649 | ix, ii->ii_ndisk, ii->ii_startblk, ii->ii_startoff); |
1650 | for (i = 0; i < ii->ii_ndisk; i++) |
1651 | printf(" %d" , ii->ii_index[i]); |
1652 | printf("\n" ); |
1653 | } |
1654 | } |
1655 | #endif |
1656 | |
1657 | MODULE(MODULE_CLASS_DRIVER, ccd, "dk_subr" ); |
1658 | |
1659 | static int |
1660 | ccd_modcmd(modcmd_t cmd, void *arg) |
1661 | { |
1662 | int error = 0; |
1663 | #ifdef _MODULE |
1664 | int bmajor = -1, cmajor = -1; |
1665 | #endif |
1666 | |
1667 | |
1668 | switch (cmd) { |
1669 | case MODULE_CMD_INIT: |
1670 | #ifdef _MODULE |
1671 | ccdattach(0); |
1672 | |
1673 | error = devsw_attach("ccd" , &ccd_bdevsw, &bmajor, |
1674 | &ccd_cdevsw, &cmajor); |
1675 | sysctl_kern_ccd_setup(&ccd_clog); |
1676 | #endif |
1677 | break; |
1678 | |
1679 | case MODULE_CMD_FINI: |
1680 | #ifdef _MODULE |
1681 | mutex_enter(&ccd_lock); |
1682 | if (ccd_nactive) { |
1683 | mutex_exit(&ccd_lock); |
1684 | error = EBUSY; |
1685 | } else { |
1686 | mutex_exit(&ccd_lock); |
1687 | error = devsw_detach(&ccd_bdevsw, &ccd_cdevsw); |
1688 | ccddetach(); |
1689 | } |
1690 | sysctl_teardown(&ccd_clog); |
1691 | #endif |
1692 | break; |
1693 | |
1694 | case MODULE_CMD_STAT: |
1695 | return ENOTTY; |
1696 | |
1697 | default: |
1698 | return ENOTTY; |
1699 | } |
1700 | |
1701 | return error; |
1702 | } |
1703 | |
1704 | static int |
1705 | ccd_units_sysctl(SYSCTLFN_ARGS) |
1706 | { |
1707 | struct sysctlnode node; |
1708 | struct ccd_softc *sc; |
1709 | int error, i, nccd, *units; |
1710 | size_t size; |
1711 | |
1712 | nccd = 0; |
1713 | mutex_enter(&ccd_lock); |
1714 | LIST_FOREACH(sc, &ccds, sc_link) |
1715 | nccd++; |
1716 | mutex_exit(&ccd_lock); |
1717 | |
1718 | if (nccd != 0) { |
1719 | size = nccd * sizeof(*units); |
1720 | units = kmem_zalloc(size, KM_SLEEP); |
1721 | if (units == NULL) |
1722 | return ENOMEM; |
1723 | |
1724 | i = 0; |
1725 | mutex_enter(&ccd_lock); |
1726 | LIST_FOREACH(sc, &ccds, sc_link) { |
1727 | if (i >= nccd) |
1728 | break; |
1729 | units[i] = sc->sc_unit; |
1730 | } |
1731 | mutex_exit(&ccd_lock); |
1732 | } else { |
1733 | units = NULL; |
1734 | size = 0; |
1735 | } |
1736 | |
1737 | node = *rnode; |
1738 | node.sysctl_data = units; |
1739 | node.sysctl_size = size; |
1740 | |
1741 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
1742 | if (units) |
1743 | kmem_free(units, size); |
1744 | return error; |
1745 | } |
1746 | |
1747 | static int |
1748 | ccd_info_sysctl(SYSCTLFN_ARGS) |
1749 | { |
1750 | struct sysctlnode node; |
1751 | struct ccddiskinfo ccd; |
1752 | struct ccd_softc *sc; |
1753 | int unit; |
1754 | |
1755 | if (newp == NULL || newlen != sizeof(int)) |
1756 | return EINVAL; |
1757 | |
1758 | unit = *(const int *)newp; |
1759 | newp = NULL; |
1760 | newlen = 0; |
1761 | ccd.ccd_ndisks = ~0; |
1762 | mutex_enter(&ccd_lock); |
1763 | LIST_FOREACH(sc, &ccds, sc_link) { |
1764 | if (sc->sc_unit == unit) { |
1765 | ccd.ccd_ileave = sc->sc_ileave; |
1766 | ccd.ccd_size = sc->sc_size; |
1767 | ccd.ccd_ndisks = sc->sc_nccdisks; |
1768 | ccd.ccd_flags = sc->sc_flags; |
1769 | break; |
1770 | } |
1771 | } |
1772 | mutex_exit(&ccd_lock); |
1773 | |
1774 | if (ccd.ccd_ndisks == ~0) |
1775 | return ENOENT; |
1776 | |
1777 | node = *rnode; |
1778 | node.sysctl_data = &ccd; |
1779 | node.sysctl_size = sizeof(ccd); |
1780 | |
1781 | return sysctl_lookup(SYSCTLFN_CALL(&node)); |
1782 | } |
1783 | |
1784 | static int |
1785 | ccd_components_sysctl(SYSCTLFN_ARGS) |
1786 | { |
1787 | struct sysctlnode node; |
1788 | int error, unit; |
1789 | size_t size; |
1790 | char *names, *p, *ep; |
1791 | struct ccd_softc *sc; |
1792 | |
1793 | if (newp == NULL || newlen != sizeof(int)) |
1794 | return EINVAL; |
1795 | |
1796 | size = 0; |
1797 | unit = *(const int *)newp; |
1798 | newp = NULL; |
1799 | newlen = 0; |
1800 | mutex_enter(&ccd_lock); |
1801 | LIST_FOREACH(sc, &ccds, sc_link) |
1802 | if (sc->sc_unit == unit) { |
1803 | for (size_t i = 0; i < sc->sc_nccdisks; i++) |
1804 | size += strlen(sc->sc_cinfo[i].ci_path) + 1; |
1805 | break; |
1806 | } |
1807 | mutex_exit(&ccd_lock); |
1808 | |
1809 | if (size == 0) |
1810 | return ENOENT; |
1811 | names = kmem_zalloc(size, KM_SLEEP); |
1812 | if (names == NULL) |
1813 | return ENOMEM; |
1814 | |
1815 | p = names; |
1816 | ep = names + size; |
1817 | mutex_enter(&ccd_lock); |
1818 | LIST_FOREACH(sc, &ccds, sc_link) |
1819 | if (sc->sc_unit == unit) { |
1820 | for (size_t i = 0; i < sc->sc_nccdisks; i++) { |
1821 | char *d = sc->sc_cinfo[i].ci_path; |
1822 | while (p < ep && (*p++ = *d++) != '\0') |
1823 | continue; |
1824 | } |
1825 | break; |
1826 | } |
1827 | mutex_exit(&ccd_lock); |
1828 | |
1829 | node = *rnode; |
1830 | node.sysctl_data = names; |
1831 | node.sysctl_size = ep - names; |
1832 | |
1833 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
1834 | kmem_free(names, size); |
1835 | return error; |
1836 | } |
1837 | |
1838 | SYSCTL_SETUP(sysctl_kern_ccd_setup, "sysctl kern.ccd subtree setup" ) |
1839 | { |
1840 | const struct sysctlnode *node = NULL; |
1841 | |
1842 | sysctl_createv(clog, 0, NULL, &node, |
1843 | CTLFLAG_PERMANENT, |
1844 | CTLTYPE_NODE, "ccd" , |
1845 | SYSCTL_DESCR("ConCatenated Disk state" ), |
1846 | NULL, 0, NULL, 0, |
1847 | CTL_KERN, CTL_CREATE, CTL_EOL); |
1848 | |
1849 | if (node == NULL) |
1850 | return; |
1851 | |
1852 | sysctl_createv(clog, 0, &node, NULL, |
1853 | CTLFLAG_PERMANENT | CTLFLAG_READONLY, |
1854 | CTLTYPE_STRUCT, "units" , |
1855 | SYSCTL_DESCR("List of ccd unit numbers" ), |
1856 | ccd_units_sysctl, 0, NULL, 0, |
1857 | CTL_CREATE, CTL_EOL); |
1858 | sysctl_createv(clog, 0, &node, NULL, |
1859 | CTLFLAG_PERMANENT | CTLFLAG_READWRITE, |
1860 | CTLTYPE_STRUCT, "info" , |
1861 | SYSCTL_DESCR("Information about a CCD unit" ), |
1862 | ccd_info_sysctl, 0, NULL, 0, |
1863 | CTL_CREATE, CTL_EOL); |
1864 | sysctl_createv(clog, 0, &node, NULL, |
1865 | CTLFLAG_PERMANENT | CTLFLAG_READWRITE, |
1866 | CTLTYPE_STRUCT, "components" , |
1867 | SYSCTL_DESCR("Information about CCD components" ), |
1868 | ccd_components_sysctl, 0, NULL, 0, |
1869 | CTL_CREATE, CTL_EOL); |
1870 | } |
1871 | |