192108Sphk/*- 292108Sphk * Copyright (c) 2002 Poul-Henning Kamp 392108Sphk * Copyright (c) 2002 Networks Associates Technology, Inc. 492108Sphk * All rights reserved. 592108Sphk * 692108Sphk * This software was developed for the FreeBSD Project by Poul-Henning Kamp 792108Sphk * and NAI Labs, the Security Research Division of Network Associates, Inc. 892108Sphk * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 992108Sphk * DARPA CHATS research program. 1092108Sphk * 1192108Sphk * Redistribution and use in source and binary forms, with or without 1292108Sphk * modification, are permitted provided that the following conditions 1392108Sphk * are met: 1492108Sphk * 1. Redistributions of source code must retain the above copyright 1592108Sphk * notice, this list of conditions and the following disclaimer. 1692108Sphk * 2. Redistributions in binary form must reproduce the above copyright 1792108Sphk * notice, this list of conditions and the following disclaimer in the 1892108Sphk * documentation and/or other materials provided with the distribution. 1992108Sphk * 3. The names of the authors may not be used to endorse or promote 2092108Sphk * products derived from this software without specific prior written 2192108Sphk * permission. 2292108Sphk * 2392108Sphk * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2492108Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2592108Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2692108Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2792108Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2892108Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2992108Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3092108Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3192108Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3292108Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3392108Sphk * SUCH DAMAGE. 3492108Sphk */ 3592108Sphk 36116196Sobrien#include <sys/cdefs.h> 37116196Sobrien__FBSDID("$FreeBSD: releng/10.3/sys/geom/geom_dev.c 291548 2015-12-01 00:53:03Z smh $"); 38116196Sobrien 3992108Sphk#include <sys/param.h> 4092108Sphk#include <sys/systm.h> 4192108Sphk#include <sys/malloc.h> 4292108Sphk#include <sys/kernel.h> 4392108Sphk#include <sys/conf.h> 44223089Sgibbs#include <sys/ctype.h> 4592108Sphk#include <sys/bio.h> 46238886Smav#include <sys/bus.h> 4792108Sphk#include <sys/lock.h> 4892108Sphk#include <sys/mutex.h> 49130712Sphk#include <sys/proc.h> 5092108Sphk#include <sys/errno.h> 5192108Sphk#include <sys/time.h> 5292108Sphk#include <sys/disk.h> 5392108Sphk#include <sys/fcntl.h> 54114216Skan#include <sys/limits.h> 55249930Ssmh#include <sys/sysctl.h> 5692108Sphk#include <geom/geom.h> 5795323Sphk#include <geom/geom_int.h> 58223089Sgibbs#include <machine/stdarg.h> 5992108Sphk 60248679Smavstruct g_dev_softc { 61248679Smav struct mtx sc_mtx; 62248679Smav struct cdev *sc_dev; 63248679Smav struct cdev *sc_alias; 64248679Smav int sc_open; 65248679Smav int sc_active; 66248679Smav}; 67223089Sgibbs 6892108Sphkstatic d_open_t g_dev_open; 6992108Sphkstatic d_close_t g_dev_close; 7092108Sphkstatic d_strategy_t g_dev_strategy; 7192108Sphkstatic d_ioctl_t g_dev_ioctl; 7292108Sphk 7392108Sphkstatic struct cdevsw g_dev_cdevsw = { 74126080Sphk .d_version = D_VERSION, 75111815Sphk .d_open = g_dev_open, 76111815Sphk .d_close = g_dev_close, 77111815Sphk .d_read = physread, 78111815Sphk .d_write = physwrite, 79111815Sphk .d_ioctl = g_dev_ioctl, 80111815Sphk .d_strategy = g_dev_strategy, 81111815Sphk .d_name = "g_dev", 82254389Sken .d_flags = D_DISK | D_TRACKCLOSE, 8392108Sphk}; 8492108Sphk 85273817Saestatic g_init_t g_dev_init; 86273817Saestatic g_fini_t g_dev_fini; 8792108Sphkstatic g_taste_t g_dev_taste; 8892108Sphkstatic g_orphan_t g_dev_orphan; 89223089Sgibbsstatic g_attrchanged_t g_dev_attrchanged; 9092108Sphk 9193248Sphkstatic struct g_class g_dev_class = { 92112552Sphk .name = "DEV", 93133318Sphk .version = G_VERSION, 94273817Sae .init = g_dev_init, 95273817Sae .fini = g_dev_fini, 96112552Sphk .taste = g_dev_taste, 97133314Sphk .orphan = g_dev_orphan, 98223089Sgibbs .attrchanged = g_dev_attrchanged 9992108Sphk}; 10092108Sphk 101249930Ssmh/* 102249930Ssmh * We target 262144 (8 x 32768) sectors by default as this significantly 103249930Ssmh * increases the throughput on commonly used SSD's with a marginal 104249930Ssmh * increase in non-interruptible request latency. 105249930Ssmh */ 106249930Ssmhstatic uint64_t g_dev_del_max_sectors = 262144; 107249930SsmhSYSCTL_DECL(_kern_geom); 108249930SsmhSYSCTL_NODE(_kern_geom, OID_AUTO, dev, CTLFLAG_RW, 0, "GEOM_DEV stuff"); 109249930SsmhSYSCTL_QUAD(_kern_geom_dev, OID_AUTO, delete_max_sectors, CTLFLAG_RW, 110249930Ssmh &g_dev_del_max_sectors, 0, "Maximum number of sectors in a single " 111249930Ssmh "delete request sent to the provider. Larger requests are chunked " 112249930Ssmh "so they can be interrupted. (0 = disable chunking)"); 113249930Ssmh 114273817Saestatic char *dumpdev = NULL; 115248679Smavstatic void 116273817Saeg_dev_init(struct g_class *mp) 117273817Sae{ 118273817Sae 119273817Sae dumpdev = getenv("dumpdev"); 120273817Sae} 121273817Sae 122273817Saestatic void 123273817Saeg_dev_fini(struct g_class *mp) 124273817Sae{ 125273817Sae 126273817Sae freeenv(dumpdev); 127291547Ssmh dumpdev = NULL; 128273817Sae} 129273817Sae 130273817Saestatic int 131291215Ssmhg_dev_setdumpdev(struct cdev *dev, struct thread *td) 132273817Sae{ 133273817Sae struct g_kerneldump kd; 134273817Sae struct g_consumer *cp; 135273817Sae int error, len; 136273817Sae 137273817Sae if (dev == NULL) 138291215Ssmh return (set_dumper(NULL, NULL, td)); 139273817Sae 140273817Sae cp = dev->si_drv2; 141273817Sae len = sizeof(kd); 142273817Sae kd.offset = 0; 143273817Sae kd.length = OFF_MAX; 144273817Sae error = g_io_getattr("GEOM::kerneldump", cp, &len, &kd); 145273817Sae if (error == 0) { 146291215Ssmh error = set_dumper(&kd.di, devtoname(dev), td); 147273817Sae if (error == 0) 148273817Sae dev->si_flags |= SI_DUMPDEV; 149273817Sae } 150273817Sae return (error); 151273817Sae} 152273817Sae 153291548Ssmhstatic int 154273817Saeinit_dumpdev(struct cdev *dev) 155273817Sae{ 156291548Ssmh struct g_consumer *cp; 157291547Ssmh const char *devprefix = "/dev/", *devname; 158291548Ssmh int error; 159291547Ssmh size_t len; 160273817Sae 161273817Sae if (dumpdev == NULL) 162291548Ssmh return (0); 163291548Ssmh 164291547Ssmh len = strlen(devprefix); 165291547Ssmh devname = devtoname(dev); 166291547Ssmh if (strcmp(devname, dumpdev) != 0 && 167291547Ssmh (strncmp(dumpdev, devprefix, len) != 0 || 168291547Ssmh strcmp(devname, dumpdev + len) != 0)) 169291548Ssmh return (0); 170291548Ssmh 171291548Ssmh cp = (struct g_consumer *)dev->si_drv2; 172291548Ssmh error = g_access(cp, 1, 0, 0); 173291548Ssmh if (error != 0) 174291548Ssmh return (error); 175291548Ssmh 176291548Ssmh error = g_dev_setdumpdev(dev, curthread); 177291548Ssmh if (error == 0) { 178273817Sae freeenv(dumpdev); 179273817Sae dumpdev = NULL; 180273817Sae } 181291548Ssmh 182291548Ssmh (void)g_access(cp, -1, 0, 0); 183291548Ssmh 184291548Ssmh return (error); 185273817Sae} 186273817Sae 187273817Saestatic void 188248679Smavg_dev_destroy(void *arg, int flags __unused) 189248679Smav{ 190248679Smav struct g_consumer *cp; 191248679Smav struct g_geom *gp; 192248679Smav struct g_dev_softc *sc; 193282953Strasz char buf[SPECNAMELEN + 6]; 194248679Smav 195248679Smav g_topology_assert(); 196248679Smav cp = arg; 197248679Smav gp = cp->geom; 198248679Smav sc = cp->private; 199248679Smav g_trace(G_T_TOPOLOGY, "g_dev_destroy(%p(%s))", cp, gp->name); 200282953Strasz snprintf(buf, sizeof(buf), "cdev=%s", gp->name); 201282953Strasz devctl_notify_f("GEOM", "DEV", "DESTROY", buf, M_WAITOK); 202248679Smav if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 203248679Smav g_access(cp, -cp->acr, -cp->acw, -cp->ace); 204248679Smav g_detach(cp); 205248679Smav g_destroy_consumer(cp); 206248679Smav g_destroy_geom(gp); 207248679Smav mtx_destroy(&sc->sc_mtx); 208248679Smav g_free(sc); 209248679Smav} 210248679Smav 211115960Sphkvoid 212105947Sphkg_dev_print(void) 213105947Sphk{ 214105947Sphk struct g_geom *gp; 215115960Sphk char const *p = ""; 216105947Sphk 217115960Sphk LIST_FOREACH(gp, &g_dev_class.geom, geom) { 218115960Sphk printf("%s%s", p, gp->name); 219115960Sphk p = " "; 220115960Sphk } 221105947Sphk printf("\n"); 222105947Sphk} 223105947Sphk 224223089Sgibbsstatic void 225223089Sgibbsg_dev_attrchanged(struct g_consumer *cp, const char *attr) 226223089Sgibbs{ 227248679Smav struct g_dev_softc *sc; 228238886Smav struct cdev *dev; 229238886Smav char buf[SPECNAMELEN + 6]; 230223089Sgibbs 231248679Smav sc = cp->private; 232238886Smav if (strcmp(attr, "GEOM::media") == 0) { 233248679Smav dev = sc->sc_dev; 234238886Smav snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); 235238886Smav devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, M_WAITOK); 236282953Strasz devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, M_WAITOK); 237248679Smav dev = sc->sc_alias; 238238886Smav if (dev != NULL) { 239238886Smav snprintf(buf, sizeof(buf), "cdev=%s", dev->si_name); 240238886Smav devctl_notify_f("DEVFS", "CDEV", "MEDIACHANGE", buf, 241238886Smav M_WAITOK); 242282953Strasz devctl_notify_f("GEOM", "DEV", "MEDIACHANGE", buf, 243282953Strasz M_WAITOK); 244238886Smav } 245238886Smav return; 246238886Smav } 247238886Smav 248223089Sgibbs if (strcmp(attr, "GEOM::physpath") != 0) 249223089Sgibbs return; 250223089Sgibbs 251223089Sgibbs if (g_access(cp, 1, 0, 0) == 0) { 252223089Sgibbs char *physpath; 253223089Sgibbs int error, physpath_len; 254223089Sgibbs 255223089Sgibbs physpath_len = MAXPATHLEN; 256223089Sgibbs physpath = g_malloc(physpath_len, M_WAITOK|M_ZERO); 257223089Sgibbs error = 258223089Sgibbs g_io_getattr("GEOM::physpath", cp, &physpath_len, physpath); 259223089Sgibbs g_access(cp, -1, 0, 0); 260223089Sgibbs if (error == 0 && strlen(physpath) != 0) { 261223089Sgibbs struct cdev *old_alias_dev; 262223089Sgibbs struct cdev **alias_devp; 263223089Sgibbs 264248679Smav dev = sc->sc_dev; 265248679Smav old_alias_dev = sc->sc_alias; 266248679Smav alias_devp = (struct cdev **)&sc->sc_alias; 267223089Sgibbs make_dev_physpath_alias(MAKEDEV_WAITOK, alias_devp, 268223089Sgibbs dev, old_alias_dev, physpath); 269248679Smav } else if (sc->sc_alias) { 270248679Smav destroy_dev((struct cdev *)sc->sc_alias); 271248679Smav sc->sc_alias = NULL; 272223089Sgibbs } 273223089Sgibbs g_free(physpath); 274223089Sgibbs } 275223089Sgibbs} 276223089Sgibbs 277119593Sphkstruct g_provider * 278130585Sphkg_dev_getprovider(struct cdev *dev) 279119593Sphk{ 280119593Sphk struct g_consumer *cp; 281119593Sphk 282135716Sphk g_topology_assert(); 283119593Sphk if (dev == NULL) 284119593Sphk return (NULL); 285135716Sphk if (dev->si_devsw != &g_dev_cdevsw) 286143790Sphk return (NULL); 287143790Sphk cp = dev->si_drv2; 288119593Sphk return (cp->provider); 289119593Sphk} 290119593Sphk 29192108Sphkstatic struct g_geom * 29293250Sphkg_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) 29392108Sphk{ 29492108Sphk struct g_geom *gp; 29592108Sphk struct g_consumer *cp; 296248679Smav struct g_dev_softc *sc; 297221071Smav int error, len; 298221071Smav struct cdev *dev, *adev; 299282953Strasz char buf[SPECNAMELEN + 6], *val; 30092108Sphk 30192108Sphk g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name); 30292108Sphk g_topology_assert(); 303243333Sjh gp = g_new_geomf(mp, "%s", pp->name); 304248679Smav sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 305248679Smav mtx_init(&sc->sc_mtx, "g_dev", NULL, MTX_DEF); 30692108Sphk cp = g_new_consumer(gp); 307248679Smav cp->private = sc; 308260385Sscottl cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 30996987Sphk error = g_attach(cp, pp); 31096987Sphk KASSERT(error == 0, 31196987Sphk ("g_dev_taste(%s) failed to g_attach, err=%d", pp->name, error)); 312214063Sjh error = make_dev_p(MAKEDEV_CHECKNAME | MAKEDEV_WAITOK, &dev, 313214063Sjh &g_dev_cdevsw, NULL, UID_ROOT, GID_OPERATOR, 0640, "%s", gp->name); 314214063Sjh if (error != 0) { 315214063Sjh printf("%s: make_dev_p() failed (gp->name=%s, error=%d)\n", 316214063Sjh __func__, gp->name, error); 317214063Sjh g_detach(cp); 318214063Sjh g_destroy_consumer(cp); 319214063Sjh g_destroy_geom(gp); 320248679Smav mtx_destroy(&sc->sc_mtx); 321248679Smav g_free(sc); 322214063Sjh return (NULL); 323214063Sjh } 324254389Sken dev->si_flags |= SI_UNMAPPED; 325248679Smav sc->sc_dev = dev; 326221071Smav 327221071Smav /* Search for device alias name and create it if found. */ 328221071Smav adev = NULL; 329221071Smav for (len = MIN(strlen(gp->name), sizeof(buf) - 15); len > 0; len--) { 330221071Smav snprintf(buf, sizeof(buf), "kern.devalias.%s", gp->name); 331221071Smav buf[14 + len] = 0; 332221071Smav val = getenv(buf); 333221071Smav if (val != NULL) { 334221071Smav snprintf(buf, sizeof(buf), "%s%s", 335221071Smav val, gp->name + len); 336221071Smav freeenv(val); 337221400Smav make_dev_alias_p(MAKEDEV_CHECKNAME | MAKEDEV_WAITOK, 338221400Smav &adev, dev, "%s", buf); 339254389Sken adev->si_flags |= SI_UNMAPPED; 340221071Smav break; 341221071Smav } 342221071Smav } 343221071Smav 344110728Sphk dev->si_iosize_max = MAXPHYS; 34592108Sphk dev->si_drv2 = cp; 346291548Ssmh error = init_dumpdev(dev); 347291548Ssmh if (error != 0) 348291548Ssmh printf("%s: init_dumpdev() failed (gp->name=%s, error=%d)\n", 349291548Ssmh __func__, gp->name, error); 350221071Smav if (adev != NULL) { 351221071Smav adev->si_iosize_max = MAXPHYS; 352221071Smav adev->si_drv2 = cp; 353273817Sae init_dumpdev(adev); 354221071Smav } 355223089Sgibbs 356223089Sgibbs g_dev_attrchanged(cp, "GEOM::physpath"); 357282953Strasz snprintf(buf, sizeof(buf), "cdev=%s", gp->name); 358282953Strasz devctl_notify_f("GEOM", "DEV", "CREATE", buf, M_WAITOK); 359223089Sgibbs 36092108Sphk return (gp); 36192108Sphk} 36292108Sphk 36392108Sphkstatic int 364130585Sphkg_dev_open(struct cdev *dev, int flags, int fmt, struct thread *td) 36592108Sphk{ 36692108Sphk struct g_consumer *cp; 367248679Smav struct g_dev_softc *sc; 36892108Sphk int error, r, w, e; 36992108Sphk 37092108Sphk cp = dev->si_drv2; 371248679Smav if (cp == NULL) 372112978Sphk return(ENXIO); /* g_dev_taste() not done yet */ 37392108Sphk g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)", 374248679Smav cp->geom->name, flags, fmt, td); 375130712Sphk 37692108Sphk r = flags & FREAD ? 1 : 0; 37792108Sphk w = flags & FWRITE ? 1 : 0; 378103004Sphk#ifdef notyet 37992108Sphk e = flags & O_EXCL ? 1 : 0; 380103004Sphk#else 381103004Sphk e = 0; 382103004Sphk#endif 383289512Strasz 384289512Strasz /* 385289512Strasz * This happens on attempt to open a device node with O_EXEC. 386289512Strasz */ 387289512Strasz if (r + w + e == 0) 388289512Strasz return (EINVAL); 389289512Strasz 390130712Sphk if (w) { 391130712Sphk /* 392130712Sphk * When running in very secure mode, do not allow 393130712Sphk * opens for writing of any disks. 394130712Sphk */ 395130712Sphk error = securelevel_ge(td->td_ucred, 2); 396130712Sphk if (error) 397130712Sphk return (error); 398130712Sphk } 399112978Sphk g_topology_lock(); 400248679Smav error = g_access(cp, r, w, e); 40192108Sphk g_topology_unlock(); 402248679Smav if (error == 0) { 403248679Smav sc = cp->private; 404248679Smav mtx_lock(&sc->sc_mtx); 405248679Smav if (sc->sc_open == 0 && sc->sc_active != 0) 406248679Smav wakeup(&sc->sc_active); 407248679Smav sc->sc_open += r + w + e; 408248679Smav mtx_unlock(&sc->sc_mtx); 409248679Smav } 41092108Sphk return(error); 41192108Sphk} 41292108Sphk 41392108Sphkstatic int 414130585Sphkg_dev_close(struct cdev *dev, int flags, int fmt, struct thread *td) 41592108Sphk{ 41692108Sphk struct g_consumer *cp; 417248679Smav struct g_dev_softc *sc; 418248679Smav int error, r, w, e; 41992108Sphk 42092108Sphk cp = dev->si_drv2; 421248679Smav if (cp == NULL) 42292108Sphk return(ENXIO); 42392108Sphk g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)", 424248679Smav cp->geom->name, flags, fmt, td); 425248679Smav 42692108Sphk r = flags & FREAD ? -1 : 0; 42792108Sphk w = flags & FWRITE ? -1 : 0; 428103004Sphk#ifdef notyet 42992108Sphk e = flags & O_EXCL ? -1 : 0; 430103004Sphk#else 431103004Sphk e = 0; 432103004Sphk#endif 433289511Strasz 434289511Strasz /* 435289511Strasz * The vgonel(9) - caused by eg. forced unmount of devfs - calls 436289511Strasz * VOP_CLOSE(9) on devfs vnode without any FREAD or FWRITE flags, 437289511Strasz * which would result in zero deltas, which in turn would cause 438289511Strasz * panic in g_access(9). 439289511Strasz * 440289511Strasz * Note that we cannot zero the counters (ie. do "r = cp->acr" 441289511Strasz * etc) instead, because the consumer might be opened in another 442289511Strasz * devfs instance. 443289511Strasz */ 444289511Strasz if (r + w + e == 0) 445289511Strasz return (EINVAL); 446289511Strasz 447248679Smav sc = cp->private; 448248679Smav mtx_lock(&sc->sc_mtx); 449248679Smav sc->sc_open += r + w + e; 450248679Smav while (sc->sc_open == 0 && sc->sc_active != 0) 451248679Smav msleep(&sc->sc_active, &sc->sc_mtx, 0, "PRIBIO", 0); 452248679Smav mtx_unlock(&sc->sc_mtx); 453112978Sphk g_topology_lock(); 454248679Smav error = g_access(cp, r, w, e); 45592108Sphk g_topology_unlock(); 45692108Sphk return (error); 45792108Sphk} 45892108Sphk 459112978Sphk/* 460112978Sphk * XXX: Until we have unmessed the ioctl situation, there is a race against 461112978Sphk * XXX: a concurrent orphanization. We cannot close it by holding topology 462112978Sphk * XXX: since that would prevent us from doing our job, and stalling events 463112978Sphk * XXX: will break (actually: stall) the BSD disklabel hacks. 464112978Sphk */ 46592108Sphkstatic int 466130585Sphkg_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) 46792108Sphk{ 46892108Sphk struct g_consumer *cp; 469182843Slulf struct g_provider *pp; 470174674Sphk off_t offset, length, chunk; 47192108Sphk int i, error; 47292108Sphk 47392108Sphk cp = dev->si_drv2; 474182843Slulf pp = cp->provider; 47592108Sphk 47692108Sphk error = 0; 477112978Sphk KASSERT(cp->acr || cp->acw, 478112978Sphk ("Consumer with zero access count in g_dev_ioctl")); 47992403Sphk 48092698Sphk i = IOCPARM_LEN(cmd); 48192698Sphk switch (cmd) { 48292698Sphk case DIOCGSECTORSIZE: 483105551Sphk *(u_int *)data = cp->provider->sectorsize; 484105551Sphk if (*(u_int *)data == 0) 485105180Snjl error = ENOENT; 48692698Sphk break; 48792698Sphk case DIOCGMEDIASIZE: 488105551Sphk *(off_t *)data = cp->provider->mediasize; 489105551Sphk if (*(off_t *)data == 0) 490105180Snjl error = ENOENT; 49192698Sphk break; 49292698Sphk case DIOCGFWSECTORS: 49393250Sphk error = g_io_getattr("GEOM::fwsectors", cp, &i, data); 494105180Snjl if (error == 0 && *(u_int *)data == 0) 495105180Snjl error = ENOENT; 49692698Sphk break; 49792698Sphk case DIOCGFWHEADS: 49893250Sphk error = g_io_getattr("GEOM::fwheads", cp, &i, data); 499105180Snjl if (error == 0 && *(u_int *)data == 0) 500105180Snjl error = ENOENT; 50192698Sphk break; 50294287Sphk case DIOCGFRONTSTUFF: 50394287Sphk error = g_io_getattr("GEOM::frontstuff", cp, &i, data); 50494287Sphk break; 50595038Sphk case DIOCSKERNELDUMP: 506273817Sae if (*(u_int *)data == 0) 507291215Ssmh error = g_dev_setdumpdev(NULL, td); 508273817Sae else 509291215Ssmh error = g_dev_setdumpdev(dev, td); 51095038Sphk break; 511169284Spjd case DIOCGFLUSH: 512169284Spjd error = g_io_flush(cp); 513169284Spjd break; 514169284Spjd case DIOCGDELETE: 515169284Spjd offset = ((off_t *)data)[0]; 516169284Spjd length = ((off_t *)data)[1]; 517169284Spjd if ((offset % cp->provider->sectorsize) != 0 || 518174669Sphk (length % cp->provider->sectorsize) != 0 || length <= 0) { 519169284Spjd printf("%s: offset=%jd length=%jd\n", __func__, offset, 520169284Spjd length); 521169284Spjd error = EINVAL; 522169284Spjd break; 523169284Spjd } 524174674Sphk while (length > 0) { 525174674Sphk chunk = length; 526249930Ssmh if (g_dev_del_max_sectors != 0 && chunk > 527249930Ssmh g_dev_del_max_sectors * cp->provider->sectorsize) { 528249930Ssmh chunk = g_dev_del_max_sectors * 529249930Ssmh cp->provider->sectorsize; 530249930Ssmh } 531174674Sphk error = g_delete_data(cp, offset, chunk); 532174674Sphk length -= chunk; 533174674Sphk offset += chunk; 534174674Sphk if (error) 535174674Sphk break; 536174674Sphk /* 537249930Ssmh * Since the request size can be large, the service 538249930Ssmh * time can be is likewise. We make this ioctl 539249930Ssmh * interruptible by checking for signals for each bio. 540174674Sphk */ 541174674Sphk if (SIGPENDING(td)) 542174674Sphk break; 543174674Sphk } 544169284Spjd break; 545169284Spjd case DIOCGIDENT: 546169284Spjd error = g_io_getattr("GEOM::ident", cp, &i, data); 547169284Spjd break; 548182843Slulf case DIOCGPROVIDERNAME: 549182843Slulf if (pp == NULL) 550182843Slulf return (ENOENT); 551182843Slulf strlcpy(data, pp->name, i); 552182843Slulf break; 553200934Smav case DIOCGSTRIPESIZE: 554200934Smav *(off_t *)data = cp->provider->stripesize; 555200934Smav break; 556200934Smav case DIOCGSTRIPEOFFSET: 557200934Smav *(off_t *)data = cp->provider->stripeoffset; 558200934Smav break; 559223089Sgibbs case DIOCGPHYSPATH: 560223089Sgibbs error = g_io_getattr("GEOM::physpath", cp, &i, data); 561223089Sgibbs if (error == 0 && *(char *)data == '\0') 562223089Sgibbs error = ENOENT; 563223089Sgibbs break; 564274732Smav case DIOCGATTR: { 565274732Smav struct diocgattr_arg *arg = (struct diocgattr_arg *)data; 566274732Smav 567274732Smav if (arg->len > sizeof(arg->value)) { 568274732Smav error = EINVAL; 569274732Smav break; 570274732Smav } 571274732Smav error = g_io_getattr(arg->name, cp, &arg->len, &arg->value); 572274732Smav break; 573274732Smav } 57492698Sphk default: 575119660Sphk if (cp->provider->geom->ioctl != NULL) { 576138732Sphk error = cp->provider->geom->ioctl(cp->provider, cmd, data, fflag, td); 577119749Sphk } else { 578119749Sphk error = ENOIOCTL; 579119660Sphk } 58092698Sphk } 58192403Sphk 58292108Sphk return (error); 58392108Sphk} 58492108Sphk 58592108Sphkstatic void 58692108Sphkg_dev_done(struct bio *bp2) 58792108Sphk{ 588248679Smav struct g_consumer *cp; 589248679Smav struct g_dev_softc *sc; 59092108Sphk struct bio *bp; 591248679Smav int destroy; 59292108Sphk 593248679Smav cp = bp2->bio_from; 594248679Smav sc = cp->private; 595110517Sphk bp = bp2->bio_parent; 59692108Sphk bp->bio_error = bp2->bio_error; 597260385Sscottl bp->bio_completed = bp2->bio_completed; 598260385Sscottl bp->bio_resid = bp->bio_length - bp2->bio_completed; 599260385Sscottl if (bp2->bio_error != 0) { 60092108Sphk g_trace(G_T_BIO, "g_dev_done(%p) had error %d", 601260385Sscottl bp2, bp2->bio_error); 60292108Sphk bp->bio_flags |= BIO_ERROR; 60392108Sphk } else { 604105540Sphk g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %jd", 605260385Sscottl bp2, bp, bp2->bio_resid, (intmax_t)bp2->bio_completed); 60692108Sphk } 60792108Sphk g_destroy_bio(bp2); 608248679Smav destroy = 0; 609248679Smav mtx_lock(&sc->sc_mtx); 610248679Smav if ((--sc->sc_active) == 0) { 611248679Smav if (sc->sc_open == 0) 612248679Smav wakeup(&sc->sc_active); 613248679Smav if (sc->sc_dev == NULL) 614248679Smav destroy = 1; 615248679Smav } 616248679Smav mtx_unlock(&sc->sc_mtx); 617248679Smav if (destroy) 618287850Simp g_post_event(g_dev_destroy, cp, M_NOWAIT, NULL); 61992108Sphk biodone(bp); 62092108Sphk} 62192108Sphk 62292108Sphkstatic void 62392108Sphkg_dev_strategy(struct bio *bp) 62492108Sphk{ 62592108Sphk struct g_consumer *cp; 62692108Sphk struct bio *bp2; 627130585Sphk struct cdev *dev; 628248679Smav struct g_dev_softc *sc; 62992108Sphk 630106300Sphk KASSERT(bp->bio_cmd == BIO_READ || 631106300Sphk bp->bio_cmd == BIO_WRITE || 632249193Strasz bp->bio_cmd == BIO_DELETE || 633249193Strasz bp->bio_cmd == BIO_FLUSH, 634106300Sphk ("Wrong bio_cmd bio=%p cmd=%d", bp, bp->bio_cmd)); 63592108Sphk dev = bp->bio_dev; 63692108Sphk cp = dev->si_drv2; 637248679Smav sc = cp->private; 638112978Sphk KASSERT(cp->acr || cp->acw, 639112978Sphk ("Consumer with zero access count in g_dev_strategy")); 640196964Smav#ifdef INVARIANTS 641135865Spjd if ((bp->bio_offset % cp->provider->sectorsize) != 0 || 642135865Spjd (bp->bio_bcount % cp->provider->sectorsize) != 0) { 643159756Ssimon bp->bio_resid = bp->bio_bcount; 644135865Spjd biofinish(bp, NULL, EINVAL); 645135865Spjd return; 646135865Spjd } 647196964Smav#endif 648248679Smav mtx_lock(&sc->sc_mtx); 649248679Smav KASSERT(sc->sc_open > 0, ("Closed device in g_dev_strategy")); 650248679Smav sc->sc_active++; 651248679Smav mtx_unlock(&sc->sc_mtx); 652248679Smav 653118869Sphk for (;;) { 654118869Sphk /* 655118869Sphk * XXX: This is not an ideal solution, but I belive it to 656118869Sphk * XXX: deadlock safe, all things considered. 657118869Sphk */ 658118869Sphk bp2 = g_clone_bio(bp); 659118869Sphk if (bp2 != NULL) 660118869Sphk break; 661167086Sjhb pause("gdstrat", hz / 10); 662118869Sphk } 663107834Sphk KASSERT(bp2 != NULL, ("XXX: ENOMEM in a bad place")); 66492108Sphk bp2->bio_done = g_dev_done; 66592108Sphk g_trace(G_T_BIO, 666105540Sphk "g_dev_strategy(%p/%p) offset %jd length %jd data %p cmd %d", 667105540Sphk bp, bp2, (intmax_t)bp->bio_offset, (intmax_t)bp2->bio_length, 668105540Sphk bp2->bio_data, bp2->bio_cmd); 66992108Sphk g_io_request(bp2, cp); 670112978Sphk KASSERT(cp->acr || cp->acw, 671112978Sphk ("g_dev_strategy raced with g_dev_close and lost")); 672112978Sphk 67392108Sphk} 67492108Sphk 67596987Sphk/* 676248679Smav * g_dev_callback() 677248679Smav * 678248679Smav * Called by devfs when asynchronous device destruction is completed. 679248679Smav * - Mark that we have no attached device any more. 680248679Smav * - If there are no outstanding requests, schedule geom destruction. 681248679Smav * Otherwise destruction will be scheduled later by g_dev_done(). 682248679Smav */ 683248679Smav 684248679Smavstatic void 685248679Smavg_dev_callback(void *arg) 686248679Smav{ 687248679Smav struct g_consumer *cp; 688248679Smav struct g_dev_softc *sc; 689248679Smav int destroy; 690248679Smav 691248679Smav cp = arg; 692248679Smav sc = cp->private; 693248679Smav g_trace(G_T_TOPOLOGY, "g_dev_callback(%p(%s))", cp, cp->geom->name); 694248679Smav 695248679Smav mtx_lock(&sc->sc_mtx); 696248679Smav sc->sc_dev = NULL; 697248679Smav sc->sc_alias = NULL; 698248679Smav destroy = (sc->sc_active == 0); 699248679Smav mtx_unlock(&sc->sc_mtx); 700248679Smav if (destroy) 701248679Smav g_post_event(g_dev_destroy, cp, M_WAITOK, NULL); 702248679Smav} 703248679Smav 704248679Smav/* 70596987Sphk * g_dev_orphan() 70696987Sphk * 707112024Sphk * Called from below when the provider orphaned us. 708112024Sphk * - Clear any dump settings. 709248679Smav * - Request asynchronous device destruction to prevent any more requests 710248679Smav * from coming in. The provider is already marked with an error, so 711248679Smav * anything which comes in in the interrim will be returned immediately. 71296987Sphk */ 71392108Sphk 71492108Sphkstatic void 71593250Sphkg_dev_orphan(struct g_consumer *cp) 71692108Sphk{ 717130585Sphk struct cdev *dev; 718248679Smav struct g_dev_softc *sc; 71992108Sphk 720112024Sphk g_topology_assert(); 721248679Smav sc = cp->private; 722248679Smav dev = sc->sc_dev; 723248679Smav g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, cp->geom->name); 724112024Sphk 725112024Sphk /* Reset any dump-area set on this device */ 72695038Sphk if (dev->si_flags & SI_DUMPDEV) 727291215Ssmh (void)set_dumper(NULL, NULL, curthread); 728112024Sphk 729130585Sphk /* Destroy the struct cdev *so we get no more requests */ 730248679Smav destroy_dev_sched_cb(dev, g_dev_callback, cp); 73192108Sphk} 73292108Sphk 73396987SphkDECLARE_GEOM_CLASS(g_dev_class, g_dev); 734