1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the

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29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/sys/geom/geom_disk.c 219970 2011-03-24 19:23:42Z mav $");
38
39#include "opt_geom.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/bio.h>

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51#include <machine/md_var.h>
52
53#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56#include <geom/geom_disk.h>
57#include <geom/geom_int.h>
58
59#include <dev/led/led.h>
60
61struct g_disk_softc {
62 struct disk *dp;
63 struct sysctl_ctx_list sysctl_ctx;
64 struct sysctl_oid *sysctl_tree;
65 char led[64];
66 uint32_t state;
67};
68
69static struct mtx g_disk_done_mtx;
70
71static g_access_t g_disk_access;
72static g_init_t g_disk_init;
73static g_fini_t g_disk_fini;
74static g_start_t g_disk_start;
75static g_ioctl_t g_disk_ioctl;
76static g_dumpconf_t g_disk_dumpconf;

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81 .init = g_disk_init,
82 .fini = g_disk_fini,
83 .start = g_disk_start,
84 .access = g_disk_access,
85 .ioctl = g_disk_ioctl,
86 .dumpconf = g_disk_dumpconf,
87};
88
89SYSCTL_DECL(_kern_geom);
90SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, "GEOM_DISK stuff");
91
92static void
93g_disk_init(struct g_class *mp __unused)
94{
95
96 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF);
97}
98
99static void

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118 if (dp->d_flags & DISKFLAG_NEEDSGIANT)
119 mtx_unlock(&Giant);
120}
121
122static int
123g_disk_access(struct g_provider *pp, int r, int w, int e)
124{
125 struct disk *dp;
126 struct g_disk_softc *sc;
127 int error;
128
129 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
130 pp->name, r, w, e);
131 g_topology_assert();
132 sc = pp->geom->softc;
133 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
134 /*
135 * Allow decreasing access count even if disk is not
136 * avaliable anymore.
137 */
138 if (r <= 0 && w <= 0 && e <= 0)
139 return (0);
140 return (ENXIO);
141 }

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164 if (dp->d_close != NULL) {
165 g_disk_lock_giant(dp);
166 error = dp->d_close(dp);
167 if (error != 0)
168 printf("Closed disk %s -> %d\n",
169 pp->name, error);
170 g_disk_unlock_giant(dp);
171 }
172 sc->state = G_STATE_ACTIVE;
173 if (sc->led[0] != 0)
174 led_set(sc->led, "0");
175 dp->d_flags &= ~DISKFLAG_OPEN;
176 }
177 return (error);
178}
179
180static void
181g_disk_kerneldump(struct bio *bp, struct disk *dp)
182{

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198 gkd->di.mediaoffset = gkd->offset;
199 if ((gkd->offset + gkd->length) > dp->d_mediasize)
200 gkd->length = dp->d_mediasize - gkd->offset;
201 gkd->di.mediasize = gkd->length;
202 g_io_deliver(bp, 0);
203}
204
205static void
206g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
207{
208 const char *cmd;
209
210 memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
211 if (sc->led[0] != 0) {
212 switch (sc->state) {
213 case G_STATE_FAILED:
214 cmd = "1";
215 break;
216 case G_STATE_REBUILD:
217 cmd = "f5";
218 break;
219 case G_STATE_RESYNC:
220 cmd = "f1";
221 break;
222 default:
223 cmd = "0";
224 break;
225 }
226 led_set(sc->led, cmd);
227 }
228 g_io_deliver(bp, 0);
229}
230
231static void
232g_disk_done(struct bio *bp)
233{
234 struct bio *bp2;
235 struct disk *dp;
236 struct g_disk_softc *sc;
237
238 /* See "notes" for why we need a mutex here */
239 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
240 mtx_lock(&g_disk_done_mtx);
241 bp->bio_completed = bp->bio_length - bp->bio_resid;
242
243 bp2 = bp->bio_parent;
244 if (bp2->bio_error == 0)
245 bp2->bio_error = bp->bio_error;
246 bp2->bio_completed += bp->bio_completed;
247 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) &&
248 (sc = bp2->bio_to->geom->softc) &&
249 (dp = sc->dp)) {
250 devstat_end_transaction_bio(dp->d_devstat, bp);
251 }
252 g_destroy_bio(bp);
253 bp2->bio_inbed++;
254 if (bp2->bio_children == bp2->bio_inbed) {
255 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
256 g_io_deliver(bp2, bp2->bio_error);
257 }
258 mtx_unlock(&g_disk_done_mtx);
259}
260
261static int
262g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
263{
264 struct g_geom *gp;
265 struct disk *dp;
266 struct g_disk_softc *sc;
267 int error;
268
269 gp = pp->geom;
270 sc = gp->softc;
271 dp = sc->dp;
272
273 if (dp->d_ioctl == NULL)
274 return (ENOIOCTL);
275 g_disk_lock_giant(dp);
276 error = dp->d_ioctl(dp, cmd, data, fflag, td);
277 g_disk_unlock_giant(dp);
278 return(error);
279}
280
281static void
282g_disk_start(struct bio *bp)
283{
284 struct bio *bp2, *bp3;
285 struct disk *dp;
286 struct g_disk_softc *sc;
287 int error;
288 off_t off;
289
290 sc = bp->bio_to->geom->softc;
291 if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
292 g_io_deliver(bp, ENXIO);
293 return;
294 }
295 error = EJUSTRETURN;
296 switch(bp->bio_cmd) {
297 case BIO_DELETE:
298 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
299 error = 0;

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362 else if (g_handleattr(bp, "GEOM::hba_subvendor",
363 &dp->d_hba_subvendor, 2))
364 break;
365 else if (g_handleattr(bp, "GEOM::hba_subdevice",
366 &dp->d_hba_subdevice, 2))
367 break;
368 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
369 g_disk_kerneldump(bp, dp);
370 else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
371 g_disk_setstate(bp, sc);
372 else
373 error = ENOIOCTL;
374 break;
375 case BIO_FLUSH:
376 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)",
377 bp->bio_to->name);
378 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
379 g_io_deliver(bp, ENODEV);

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398 g_io_deliver(bp, error);
399 return;
400}
401
402static void
403g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
404{
405 struct disk *dp;
406 struct g_disk_softc *sc;
407
408 sc = gp->softc;
409 if (sc == NULL || (dp = sc->dp) == NULL)
410 return;
411 if (indent == NULL) {
412 sbuf_printf(sb, " hd %u", dp->d_fwheads);
413 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
414 return;
415 }
416 if (pp != NULL) {
417 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",

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424}
425
426static void
427g_disk_create(void *arg, int flag)
428{
429 struct g_geom *gp;
430 struct g_provider *pp;
431 struct disk *dp;
432 struct g_disk_softc *sc;
433 char tmpstr[80];
434
435 if (flag == EV_CANCEL)
436 return;
437 g_topology_assert();
438 dp = arg;
439 sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
440 sc->dp = dp;
441 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
442 gp->softc = sc;
443 pp = g_new_providerf(gp, "%s", gp->name);
444 pp->mediasize = dp->d_mediasize;
445 pp->sectorsize = dp->d_sectorsize;
446 if (dp->d_flags & DISKFLAG_CANDELETE)
447 pp->flags |= G_PF_CANDELETE;
448 pp->stripeoffset = dp->d_stripeoffset;
449 pp->stripesize = dp->d_stripesize;
450 if (bootverbose)
451 printf("GEOM: new disk %s\n", gp->name);
452 sysctl_ctx_init(&sc->sysctl_ctx);
453 snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
454 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
455 SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
456 CTLFLAG_RD, 0, tmpstr);
457 if (sc->sysctl_tree != NULL) {
458 snprintf(tmpstr, sizeof(tmpstr),
459 "kern.geom.disk.%s.led", gp->name);
460 TUNABLE_STR_FETCH(tmpstr, sc->led, sizeof(sc->led));
461 SYSCTL_ADD_STRING(&sc->sysctl_ctx,
462 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
463 CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led),
464 "LED name");
465 }
466 pp->private = sc;
467 dp->d_geom = gp;
468 g_error_provider(pp, 0);
469}
470
471static void
472g_disk_destroy(void *ptr, int flag)
473{
474 struct disk *dp;
475 struct g_geom *gp;
476 struct g_disk_softc *sc;
477
478 g_topology_assert();
479 dp = ptr;
480 gp = dp->d_geom;
481 if (gp != NULL) {
482 sc = gp->softc;
483 if (sc->sysctl_tree != NULL) {
484 sysctl_ctx_free(&sc->sysctl_ctx);
485 sc->sysctl_tree = NULL;
486 }
487 if (sc->led[0] != 0) {
488 led_set(sc->led, "0");
489 sc->led[0] = 0;
490 }
491 g_free(sc);
492 gp->softc = NULL;
493 g_wither_geom(gp, ENXIO);
494 }
495 g_free(dp);
496}
497
498/*
499 * We only allow printable characters in disk ident,

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