1dd84a43cSPoul-Henning Kamp /*- 2dd84a43cSPoul-Henning Kamp * Copyright (c) 2002 Poul-Henning Kamp 3dd84a43cSPoul-Henning Kamp * Copyright (c) 2002 Networks Associates Technology, Inc. 4dd84a43cSPoul-Henning Kamp * All rights reserved. 5dd84a43cSPoul-Henning Kamp * 6dd84a43cSPoul-Henning Kamp * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7dd84a43cSPoul-Henning Kamp * and NAI Labs, the Security Research Division of Network Associates, Inc. 8dd84a43cSPoul-Henning Kamp * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9dd84a43cSPoul-Henning Kamp * DARPA CHATS research program. 10dd84a43cSPoul-Henning Kamp * 11dd84a43cSPoul-Henning Kamp * Redistribution and use in source and binary forms, with or without 12dd84a43cSPoul-Henning Kamp * modification, are permitted provided that the following conditions 13dd84a43cSPoul-Henning Kamp * are met: 14dd84a43cSPoul-Henning Kamp * 1. Redistributions of source code must retain the above copyright 15dd84a43cSPoul-Henning Kamp * notice, this list of conditions and the following disclaimer. 16dd84a43cSPoul-Henning Kamp * 2. Redistributions in binary form must reproduce the above copyright 17dd84a43cSPoul-Henning Kamp * notice, this list of conditions and the following disclaimer in the 18dd84a43cSPoul-Henning Kamp * documentation and/or other materials provided with the distribution. 19dd84a43cSPoul-Henning Kamp * 3. The names of the authors may not be used to endorse or promote 20dd84a43cSPoul-Henning Kamp * products derived from this software without specific prior written 21dd84a43cSPoul-Henning Kamp * permission. 22dd84a43cSPoul-Henning Kamp * 23dd84a43cSPoul-Henning Kamp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24dd84a43cSPoul-Henning Kamp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25dd84a43cSPoul-Henning Kamp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26dd84a43cSPoul-Henning Kamp * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27dd84a43cSPoul-Henning Kamp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28dd84a43cSPoul-Henning Kamp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29dd84a43cSPoul-Henning Kamp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30dd84a43cSPoul-Henning Kamp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31dd84a43cSPoul-Henning Kamp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32dd84a43cSPoul-Henning Kamp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33dd84a43cSPoul-Henning Kamp * SUCH DAMAGE. 34dd84a43cSPoul-Henning Kamp */ 35dd84a43cSPoul-Henning Kamp 3650b1faefSDavid E. O'Brien #include <sys/cdefs.h> 3750b1faefSDavid E. O'Brien __FBSDID("$FreeBSD$"); 3850b1faefSDavid E. O'Brien 39dd84a43cSPoul-Henning Kamp #include <sys/param.h> 40dd84a43cSPoul-Henning Kamp #include <sys/systm.h> 41dd84a43cSPoul-Henning Kamp #include <sys/malloc.h> 42dd84a43cSPoul-Henning Kamp #include <sys/kernel.h> 43dd84a43cSPoul-Henning Kamp #include <sys/conf.h> 44dd84a43cSPoul-Henning Kamp #include <sys/bio.h> 45dd84a43cSPoul-Henning Kamp #include <sys/lock.h> 46dd84a43cSPoul-Henning Kamp #include <sys/mutex.h> 47fc6c63b4SPoul-Henning Kamp #include <sys/proc.h> 48dd84a43cSPoul-Henning Kamp #include <sys/errno.h> 49dd84a43cSPoul-Henning Kamp #include <sys/time.h> 50dd84a43cSPoul-Henning Kamp #include <sys/disk.h> 51dd84a43cSPoul-Henning Kamp #include <sys/fcntl.h> 52104a9b7eSAlexander Kabaev #include <sys/limits.h> 53dd84a43cSPoul-Henning Kamp #include <geom/geom.h> 5453705e35SPoul-Henning Kamp #include <geom/geom_int.h> 55dd84a43cSPoul-Henning Kamp 56dd84a43cSPoul-Henning Kamp static d_open_t g_dev_open; 57dd84a43cSPoul-Henning Kamp static d_close_t g_dev_close; 58dd84a43cSPoul-Henning Kamp static d_strategy_t g_dev_strategy; 59dd84a43cSPoul-Henning Kamp static d_ioctl_t g_dev_ioctl; 60dd84a43cSPoul-Henning Kamp 61dd84a43cSPoul-Henning Kamp static struct cdevsw g_dev_cdevsw = { 62dc08ffecSPoul-Henning Kamp .d_version = D_VERSION, 637ac40f5fSPoul-Henning Kamp .d_open = g_dev_open, 647ac40f5fSPoul-Henning Kamp .d_close = g_dev_close, 657ac40f5fSPoul-Henning Kamp .d_read = physread, 667ac40f5fSPoul-Henning Kamp .d_write = physwrite, 677ac40f5fSPoul-Henning Kamp .d_ioctl = g_dev_ioctl, 687ac40f5fSPoul-Henning Kamp .d_strategy = g_dev_strategy, 697ac40f5fSPoul-Henning Kamp .d_name = "g_dev", 70dc08ffecSPoul-Henning Kamp .d_flags = D_DISK | D_TRACKCLOSE, 71dd84a43cSPoul-Henning Kamp }; 72dd84a43cSPoul-Henning Kamp 73dd84a43cSPoul-Henning Kamp static g_taste_t g_dev_taste; 74dd84a43cSPoul-Henning Kamp static g_orphan_t g_dev_orphan; 758c24ef5fSPoul-Henning Kamp static g_init_t g_dev_init; 76dd84a43cSPoul-Henning Kamp 77e805e8f0SPoul-Henning Kamp static struct g_class g_dev_class = { 78c138fec0SPoul-Henning Kamp .name = "DEV", 795721c9c7SPoul-Henning Kamp .version = G_VERSION, 80c138fec0SPoul-Henning Kamp .taste = g_dev_taste, 81650ee351SPoul-Henning Kamp .orphan = g_dev_orphan, 828c24ef5fSPoul-Henning Kamp .init = g_dev_init, 83dd84a43cSPoul-Henning Kamp }; 84dd84a43cSPoul-Henning Kamp 858c24ef5fSPoul-Henning Kamp static struct unrhdr *unithdr; /* Locked by topology */ 868c24ef5fSPoul-Henning Kamp 878c24ef5fSPoul-Henning Kamp static void 888c24ef5fSPoul-Henning Kamp g_dev_init(struct g_class *mp) 898c24ef5fSPoul-Henning Kamp { 908c24ef5fSPoul-Henning Kamp 913b3f38edSPoul-Henning Kamp unithdr = new_unrhdr(0, minor2unit(MAXMINOR), NULL); 928c24ef5fSPoul-Henning Kamp } 938c24ef5fSPoul-Henning Kamp 9484c080a8SPoul-Henning Kamp void 95ce225127SPoul-Henning Kamp g_dev_print(void) 96ce225127SPoul-Henning Kamp { 97ce225127SPoul-Henning Kamp struct g_geom *gp; 9884c080a8SPoul-Henning Kamp char const *p = ""; 99ce225127SPoul-Henning Kamp 10084c080a8SPoul-Henning Kamp LIST_FOREACH(gp, &g_dev_class.geom, geom) { 10184c080a8SPoul-Henning Kamp printf("%s%s", p, gp->name); 10284c080a8SPoul-Henning Kamp p = " "; 10384c080a8SPoul-Henning Kamp } 104ce225127SPoul-Henning Kamp printf("\n"); 105ce225127SPoul-Henning Kamp } 106ce225127SPoul-Henning Kamp 107bff1e299SPoul-Henning Kamp struct g_provider * 10889c9c53dSPoul-Henning Kamp g_dev_getprovider(struct cdev *dev) 109bff1e299SPoul-Henning Kamp { 110bff1e299SPoul-Henning Kamp struct g_consumer *cp; 111bff1e299SPoul-Henning Kamp 112a7830346SPoul-Henning Kamp g_topology_assert(); 113bff1e299SPoul-Henning Kamp if (dev == NULL) 114bff1e299SPoul-Henning Kamp return (NULL); 115a7830346SPoul-Henning Kamp if (dev->si_devsw != &g_dev_cdevsw) 116b3b21113SPoul-Henning Kamp return (NULL); 117bff1e299SPoul-Henning Kamp cp = dev->si_drv2; 118bff1e299SPoul-Henning Kamp return (cp->provider); 119bff1e299SPoul-Henning Kamp } 120bff1e299SPoul-Henning Kamp 121bff1e299SPoul-Henning Kamp 122dd84a43cSPoul-Henning Kamp static struct g_geom * 123b1876192SPoul-Henning Kamp g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) 124dd84a43cSPoul-Henning Kamp { 125dd84a43cSPoul-Henning Kamp struct g_geom *gp; 126dd84a43cSPoul-Henning Kamp struct g_consumer *cp; 1274b8374a7SPoul-Henning Kamp int error; 12889c9c53dSPoul-Henning Kamp struct cdev *dev; 1298c24ef5fSPoul-Henning Kamp u_int unit; 130dd84a43cSPoul-Henning Kamp 131dd84a43cSPoul-Henning Kamp g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name); 132dd84a43cSPoul-Henning Kamp g_topology_assert(); 133dd84a43cSPoul-Henning Kamp LIST_FOREACH(cp, &pp->consumers, consumers) 134e805e8f0SPoul-Henning Kamp if (cp->geom->class == mp) 135dd84a43cSPoul-Henning Kamp return (NULL); 136dd84a43cSPoul-Henning Kamp gp = g_new_geomf(mp, pp->name); 137dd84a43cSPoul-Henning Kamp cp = g_new_consumer(gp); 1384b8374a7SPoul-Henning Kamp error = g_attach(cp, pp); 1394b8374a7SPoul-Henning Kamp KASSERT(error == 0, 1404b8374a7SPoul-Henning Kamp ("g_dev_taste(%s) failed to g_attach, err=%d", pp->name, error)); 1418c24ef5fSPoul-Henning Kamp unit = alloc_unr(unithdr); 1428c24ef5fSPoul-Henning Kamp dev = make_dev(&g_dev_cdevsw, unit2minor(unit), 1430a2ece04SPoul-Henning Kamp UID_ROOT, GID_OPERATOR, 0640, gp->name); 14488b1af77SPoul-Henning Kamp if (pp->flags & G_PF_CANDELETE) 14588b1af77SPoul-Henning Kamp dev->si_flags |= SI_CANDELETE; 1460364fe2cSPoul-Henning Kamp dev->si_iosize_max = MAXPHYS; 147dd84a43cSPoul-Henning Kamp gp->softc = dev; 148dd84a43cSPoul-Henning Kamp dev->si_drv1 = gp; 149dd84a43cSPoul-Henning Kamp dev->si_drv2 = cp; 150dd84a43cSPoul-Henning Kamp return (gp); 151dd84a43cSPoul-Henning Kamp } 152dd84a43cSPoul-Henning Kamp 153dd84a43cSPoul-Henning Kamp static int 15489c9c53dSPoul-Henning Kamp g_dev_open(struct cdev *dev, int flags, int fmt, struct thread *td) 155dd84a43cSPoul-Henning Kamp { 156dd84a43cSPoul-Henning Kamp struct g_geom *gp; 157dd84a43cSPoul-Henning Kamp struct g_consumer *cp; 158dd84a43cSPoul-Henning Kamp int error, r, w, e; 159dd84a43cSPoul-Henning Kamp 160dd84a43cSPoul-Henning Kamp gp = dev->si_drv1; 161dd84a43cSPoul-Henning Kamp cp = dev->si_drv2; 162c7e1925cSPoul-Henning Kamp if (gp == NULL || cp == NULL || gp->softc != dev) 163c7e1925cSPoul-Henning Kamp return(ENXIO); /* g_dev_taste() not done yet */ 164c7e1925cSPoul-Henning Kamp 165dd84a43cSPoul-Henning Kamp g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)", 166dd84a43cSPoul-Henning Kamp gp->name, flags, fmt, td); 167fc6c63b4SPoul-Henning Kamp 168dd84a43cSPoul-Henning Kamp r = flags & FREAD ? 1 : 0; 169dd84a43cSPoul-Henning Kamp w = flags & FWRITE ? 1 : 0; 17002945fefSPoul-Henning Kamp #ifdef notyet 171dd84a43cSPoul-Henning Kamp e = flags & O_EXCL ? 1 : 0; 17202945fefSPoul-Henning Kamp #else 17302945fefSPoul-Henning Kamp e = 0; 17402945fefSPoul-Henning Kamp #endif 175fc6c63b4SPoul-Henning Kamp if (w) { 176fc6c63b4SPoul-Henning Kamp /* 177fc6c63b4SPoul-Henning Kamp * When running in very secure mode, do not allow 178fc6c63b4SPoul-Henning Kamp * opens for writing of any disks. 179fc6c63b4SPoul-Henning Kamp */ 180fc6c63b4SPoul-Henning Kamp error = securelevel_ge(td->td_ucred, 2); 181fc6c63b4SPoul-Henning Kamp if (error) 182fc6c63b4SPoul-Henning Kamp return (error); 183fc6c63b4SPoul-Henning Kamp } 184c7e1925cSPoul-Henning Kamp g_topology_lock(); 185c7e1925cSPoul-Henning Kamp if (dev->si_devsw == NULL) 186c7e1925cSPoul-Henning Kamp error = ENXIO; /* We were orphaned */ 187c7e1925cSPoul-Henning Kamp else 188d2bae332SPoul-Henning Kamp error = g_access(cp, r, w, e); 189dd84a43cSPoul-Henning Kamp g_topology_unlock(); 190dd84a43cSPoul-Henning Kamp return(error); 191dd84a43cSPoul-Henning Kamp } 192dd84a43cSPoul-Henning Kamp 193dd84a43cSPoul-Henning Kamp static int 19489c9c53dSPoul-Henning Kamp g_dev_close(struct cdev *dev, int flags, int fmt, struct thread *td) 195dd84a43cSPoul-Henning Kamp { 196dd84a43cSPoul-Henning Kamp struct g_geom *gp; 197dd84a43cSPoul-Henning Kamp struct g_consumer *cp; 1984da6e74cSPoul-Henning Kamp int error, r, w, e, i; 199dd84a43cSPoul-Henning Kamp 200dd84a43cSPoul-Henning Kamp gp = dev->si_drv1; 201dd84a43cSPoul-Henning Kamp cp = dev->si_drv2; 202dd84a43cSPoul-Henning Kamp if (gp == NULL || cp == NULL) 203dd84a43cSPoul-Henning Kamp return(ENXIO); 204dd84a43cSPoul-Henning Kamp g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)", 205dd84a43cSPoul-Henning Kamp gp->name, flags, fmt, td); 206dd84a43cSPoul-Henning Kamp r = flags & FREAD ? -1 : 0; 207dd84a43cSPoul-Henning Kamp w = flags & FWRITE ? -1 : 0; 20802945fefSPoul-Henning Kamp #ifdef notyet 209dd84a43cSPoul-Henning Kamp e = flags & O_EXCL ? -1 : 0; 21002945fefSPoul-Henning Kamp #else 21102945fefSPoul-Henning Kamp e = 0; 21202945fefSPoul-Henning Kamp #endif 213c7e1925cSPoul-Henning Kamp g_topology_lock(); 214c7e1925cSPoul-Henning Kamp if (dev->si_devsw == NULL) 215c7e1925cSPoul-Henning Kamp error = ENXIO; /* We were orphaned */ 216c7e1925cSPoul-Henning Kamp else 217d2bae332SPoul-Henning Kamp error = g_access(cp, r, w, e); 2184da6e74cSPoul-Henning Kamp for (i = 0; i < 10 * hz;) { 2194da6e74cSPoul-Henning Kamp if (cp->acr != 0 || cp->acw != 0) 2204da6e74cSPoul-Henning Kamp break; 2214da6e74cSPoul-Henning Kamp if (cp->nstart == cp->nend) 2224da6e74cSPoul-Henning Kamp break; 2234d70511aSJohn Baldwin pause("gdevwclose", hz / 10); 2244da6e74cSPoul-Henning Kamp i += hz / 10; 2254da6e74cSPoul-Henning Kamp } 2264da6e74cSPoul-Henning Kamp if (cp->acr == 0 && cp->acw == 0 && cp->nstart != cp->nend) { 227752e0f01SPoul-Henning Kamp printf("WARNING: Final close of geom_dev(%s) %s %s\n", 2284da6e74cSPoul-Henning Kamp gp->name, 2294da6e74cSPoul-Henning Kamp "still has outstanding I/O after 10 seconds.", 2304da6e74cSPoul-Henning Kamp "Completing close anyway, panic may happen later."); 2314da6e74cSPoul-Henning Kamp } 232dd84a43cSPoul-Henning Kamp g_topology_unlock(); 233dd84a43cSPoul-Henning Kamp return (error); 234dd84a43cSPoul-Henning Kamp } 235dd84a43cSPoul-Henning Kamp 236c7e1925cSPoul-Henning Kamp /* 237c7e1925cSPoul-Henning Kamp * XXX: Until we have unmessed the ioctl situation, there is a race against 238c7e1925cSPoul-Henning Kamp * XXX: a concurrent orphanization. We cannot close it by holding topology 239c7e1925cSPoul-Henning Kamp * XXX: since that would prevent us from doing our job, and stalling events 240c7e1925cSPoul-Henning Kamp * XXX: will break (actually: stall) the BSD disklabel hacks. 241c7e1925cSPoul-Henning Kamp */ 242dd84a43cSPoul-Henning Kamp static int 24389c9c53dSPoul-Henning Kamp g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) 244dd84a43cSPoul-Henning Kamp { 2453bae8877SPoul-Henning Kamp struct g_geom *gp; 246dd84a43cSPoul-Henning Kamp struct g_consumer *cp; 24795c24b31SPoul-Henning Kamp struct g_kerneldump kd; 248015a11e6SPoul-Henning Kamp off_t offset, length, chunk; 249dd84a43cSPoul-Henning Kamp int i, error; 25095c24b31SPoul-Henning Kamp u_int u; 251dd84a43cSPoul-Henning Kamp 252dd84a43cSPoul-Henning Kamp gp = dev->si_drv1; 253dd84a43cSPoul-Henning Kamp cp = dev->si_drv2; 254dd84a43cSPoul-Henning Kamp 255dd84a43cSPoul-Henning Kamp error = 0; 256c7e1925cSPoul-Henning Kamp KASSERT(cp->acr || cp->acw, 257c7e1925cSPoul-Henning Kamp ("Consumer with zero access count in g_dev_ioctl")); 258a5b2e75dSPoul-Henning Kamp 25900dcdc8dSPoul-Henning Kamp i = IOCPARM_LEN(cmd); 26000dcdc8dSPoul-Henning Kamp switch (cmd) { 26100dcdc8dSPoul-Henning Kamp case DIOCGSECTORSIZE: 2623f12caa1SPoul-Henning Kamp *(u_int *)data = cp->provider->sectorsize; 2633f12caa1SPoul-Henning Kamp if (*(u_int *)data == 0) 26402fcfac0SNate Lawson error = ENOENT; 26500dcdc8dSPoul-Henning Kamp break; 26600dcdc8dSPoul-Henning Kamp case DIOCGMEDIASIZE: 2673f12caa1SPoul-Henning Kamp *(off_t *)data = cp->provider->mediasize; 2683f12caa1SPoul-Henning Kamp if (*(off_t *)data == 0) 26902fcfac0SNate Lawson error = ENOENT; 27000dcdc8dSPoul-Henning Kamp break; 27100dcdc8dSPoul-Henning Kamp case DIOCGFWSECTORS: 272b1876192SPoul-Henning Kamp error = g_io_getattr("GEOM::fwsectors", cp, &i, data); 27302fcfac0SNate Lawson if (error == 0 && *(u_int *)data == 0) 27402fcfac0SNate Lawson error = ENOENT; 27500dcdc8dSPoul-Henning Kamp break; 27600dcdc8dSPoul-Henning Kamp case DIOCGFWHEADS: 277b1876192SPoul-Henning Kamp error = g_io_getattr("GEOM::fwheads", cp, &i, data); 27802fcfac0SNate Lawson if (error == 0 && *(u_int *)data == 0) 27902fcfac0SNate Lawson error = ENOENT; 28000dcdc8dSPoul-Henning Kamp break; 2811bdb20a6SPoul-Henning Kamp case DIOCGFRONTSTUFF: 2821bdb20a6SPoul-Henning Kamp error = g_io_getattr("GEOM::frontstuff", cp, &i, data); 2831bdb20a6SPoul-Henning Kamp break; 28495c24b31SPoul-Henning Kamp case DIOCSKERNELDUMP: 28595c24b31SPoul-Henning Kamp u = *((u_int *)data); 28695c24b31SPoul-Henning Kamp if (!u) { 28795c24b31SPoul-Henning Kamp set_dumper(NULL); 28895c24b31SPoul-Henning Kamp error = 0; 28995c24b31SPoul-Henning Kamp break; 29095c24b31SPoul-Henning Kamp } 29195c24b31SPoul-Henning Kamp kd.offset = 0; 29295c24b31SPoul-Henning Kamp kd.length = OFF_MAX; 29395c24b31SPoul-Henning Kamp i = sizeof kd; 29495c24b31SPoul-Henning Kamp error = g_io_getattr("GEOM::kerneldump", cp, &i, &kd); 29595c24b31SPoul-Henning Kamp if (!error) 29695c24b31SPoul-Henning Kamp dev->si_flags |= SI_DUMPDEV; 29795c24b31SPoul-Henning Kamp break; 2980589353aSPawel Jakub Dawidek case DIOCGFLUSH: 2990589353aSPawel Jakub Dawidek error = g_io_flush(cp); 3000589353aSPawel Jakub Dawidek break; 3010589353aSPawel Jakub Dawidek case DIOCGDELETE: 3020589353aSPawel Jakub Dawidek offset = ((off_t *)data)[0]; 3030589353aSPawel Jakub Dawidek length = ((off_t *)data)[1]; 3040589353aSPawel Jakub Dawidek if ((offset % cp->provider->sectorsize) != 0 || 305eed6cda9SPoul-Henning Kamp (length % cp->provider->sectorsize) != 0 || length <= 0) { 3060589353aSPawel Jakub Dawidek printf("%s: offset=%jd length=%jd\n", __func__, offset, 3070589353aSPawel Jakub Dawidek length); 3080589353aSPawel Jakub Dawidek error = EINVAL; 3090589353aSPawel Jakub Dawidek break; 3100589353aSPawel Jakub Dawidek } 311015a11e6SPoul-Henning Kamp while (length > 0) { 312015a11e6SPoul-Henning Kamp chunk = length; 313015a11e6SPoul-Henning Kamp if (chunk > 1024 * cp->provider->sectorsize) 314015a11e6SPoul-Henning Kamp chunk = 1024 * cp->provider->sectorsize; 315015a11e6SPoul-Henning Kamp error = g_delete_data(cp, offset, chunk); 316015a11e6SPoul-Henning Kamp length -= chunk; 317015a11e6SPoul-Henning Kamp offset += chunk; 318015a11e6SPoul-Henning Kamp if (error) 319015a11e6SPoul-Henning Kamp break; 320015a11e6SPoul-Henning Kamp /* 321015a11e6SPoul-Henning Kamp * Since the request size is unbounded, the service 322015a11e6SPoul-Henning Kamp * time is likewise. We make this ioctl interruptible 323015a11e6SPoul-Henning Kamp * by checking for signals for each bio. 324015a11e6SPoul-Henning Kamp */ 325015a11e6SPoul-Henning Kamp if (SIGPENDING(td)) 326015a11e6SPoul-Henning Kamp break; 327015a11e6SPoul-Henning Kamp } 3280589353aSPawel Jakub Dawidek break; 3290589353aSPawel Jakub Dawidek case DIOCGIDENT: 3300589353aSPawel Jakub Dawidek error = g_io_getattr("GEOM::ident", cp, &i, data); 3310589353aSPawel Jakub Dawidek break; 332adfa3213SPoul-Henning Kamp 33300dcdc8dSPoul-Henning Kamp default: 334497c3347SPoul-Henning Kamp if (cp->provider->geom->ioctl != NULL) { 3352221dbebSPoul-Henning Kamp error = cp->provider->geom->ioctl(cp->provider, cmd, data, fflag, td); 336f03bec94SPoul-Henning Kamp } else { 337f03bec94SPoul-Henning Kamp error = ENOIOCTL; 338497c3347SPoul-Henning Kamp } 33900dcdc8dSPoul-Henning Kamp } 340a5b2e75dSPoul-Henning Kamp 341dd84a43cSPoul-Henning Kamp return (error); 342dd84a43cSPoul-Henning Kamp } 343dd84a43cSPoul-Henning Kamp 344dd84a43cSPoul-Henning Kamp static void 345dd84a43cSPoul-Henning Kamp g_dev_done(struct bio *bp2) 346dd84a43cSPoul-Henning Kamp { 347dd84a43cSPoul-Henning Kamp struct bio *bp; 348dd84a43cSPoul-Henning Kamp 349936cc461SPoul-Henning Kamp bp = bp2->bio_parent; 350dd84a43cSPoul-Henning Kamp bp->bio_error = bp2->bio_error; 351dd84a43cSPoul-Henning Kamp if (bp->bio_error != 0) { 352dd84a43cSPoul-Henning Kamp g_trace(G_T_BIO, "g_dev_done(%p) had error %d", 353dd84a43cSPoul-Henning Kamp bp2, bp->bio_error); 354dd84a43cSPoul-Henning Kamp bp->bio_flags |= BIO_ERROR; 355dd84a43cSPoul-Henning Kamp } else { 35614ac6812SPoul-Henning Kamp g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %jd", 35714ac6812SPoul-Henning Kamp bp2, bp, bp->bio_resid, (intmax_t)bp2->bio_completed); 358dd84a43cSPoul-Henning Kamp } 3596afb3b1cSPoul-Henning Kamp bp->bio_resid = bp->bio_length - bp2->bio_completed; 3606afb3b1cSPoul-Henning Kamp bp->bio_completed = bp2->bio_completed; 361dd84a43cSPoul-Henning Kamp g_destroy_bio(bp2); 362dd84a43cSPoul-Henning Kamp biodone(bp); 363dd84a43cSPoul-Henning Kamp } 364dd84a43cSPoul-Henning Kamp 365dd84a43cSPoul-Henning Kamp static void 366dd84a43cSPoul-Henning Kamp g_dev_strategy(struct bio *bp) 367dd84a43cSPoul-Henning Kamp { 368dd84a43cSPoul-Henning Kamp struct g_consumer *cp; 369dd84a43cSPoul-Henning Kamp struct bio *bp2; 37089c9c53dSPoul-Henning Kamp struct cdev *dev; 371dd84a43cSPoul-Henning Kamp 372b630d83fSPoul-Henning Kamp KASSERT(bp->bio_cmd == BIO_READ || 373b630d83fSPoul-Henning Kamp bp->bio_cmd == BIO_WRITE || 374b630d83fSPoul-Henning Kamp bp->bio_cmd == BIO_DELETE, 375b630d83fSPoul-Henning Kamp ("Wrong bio_cmd bio=%p cmd=%d", bp, bp->bio_cmd)); 376dd84a43cSPoul-Henning Kamp dev = bp->bio_dev; 377dd84a43cSPoul-Henning Kamp cp = dev->si_drv2; 378c7e1925cSPoul-Henning Kamp KASSERT(cp->acr || cp->acw, 379c7e1925cSPoul-Henning Kamp ("Consumer with zero access count in g_dev_strategy")); 380c7e1925cSPoul-Henning Kamp 3816c252337SPawel Jakub Dawidek if ((bp->bio_offset % cp->provider->sectorsize) != 0 || 3826c252337SPawel Jakub Dawidek (bp->bio_bcount % cp->provider->sectorsize) != 0) { 383274ede62SSimon L. B. Nielsen bp->bio_resid = bp->bio_bcount; 3846c252337SPawel Jakub Dawidek biofinish(bp, NULL, EINVAL); 3856c252337SPawel Jakub Dawidek return; 3866c252337SPawel Jakub Dawidek } 3876c252337SPawel Jakub Dawidek 3884ba5a129SPoul-Henning Kamp for (;;) { 3894ba5a129SPoul-Henning Kamp /* 3904ba5a129SPoul-Henning Kamp * XXX: This is not an ideal solution, but I belive it to 3914ba5a129SPoul-Henning Kamp * XXX: deadlock safe, all things considered. 3924ba5a129SPoul-Henning Kamp */ 393dd84a43cSPoul-Henning Kamp bp2 = g_clone_bio(bp); 3944ba5a129SPoul-Henning Kamp if (bp2 != NULL) 3954ba5a129SPoul-Henning Kamp break; 3964d70511aSJohn Baldwin pause("gdstrat", hz / 10); 3974ba5a129SPoul-Henning Kamp } 398cc0163a3SPoul-Henning Kamp KASSERT(bp2 != NULL, ("XXX: ENOMEM in a bad place")); 399dd84a43cSPoul-Henning Kamp bp2->bio_done = g_dev_done; 400dd84a43cSPoul-Henning Kamp g_trace(G_T_BIO, 40114ac6812SPoul-Henning Kamp "g_dev_strategy(%p/%p) offset %jd length %jd data %p cmd %d", 40214ac6812SPoul-Henning Kamp bp, bp2, (intmax_t)bp->bio_offset, (intmax_t)bp2->bio_length, 40314ac6812SPoul-Henning Kamp bp2->bio_data, bp2->bio_cmd); 404dd84a43cSPoul-Henning Kamp g_io_request(bp2, cp); 405c7e1925cSPoul-Henning Kamp KASSERT(cp->acr || cp->acw, 406c7e1925cSPoul-Henning Kamp ("g_dev_strategy raced with g_dev_close and lost")); 407c7e1925cSPoul-Henning Kamp 408dd84a43cSPoul-Henning Kamp } 409dd84a43cSPoul-Henning Kamp 4104b8374a7SPoul-Henning Kamp /* 4114b8374a7SPoul-Henning Kamp * g_dev_orphan() 4124b8374a7SPoul-Henning Kamp * 413df6c9fe9SPoul-Henning Kamp * Called from below when the provider orphaned us. 414df6c9fe9SPoul-Henning Kamp * - Clear any dump settings. 41589c9c53dSPoul-Henning Kamp * - Destroy the struct cdev *to prevent any more request from coming in. The 416df6c9fe9SPoul-Henning Kamp * provider is already marked with an error, so anything which comes in 417df6c9fe9SPoul-Henning Kamp * in the interrim will be returned immediately. 418df6c9fe9SPoul-Henning Kamp * - Wait for any outstanding I/O to finish. 419df6c9fe9SPoul-Henning Kamp * - Set our access counts to zero, whatever they were. 420df6c9fe9SPoul-Henning Kamp * - Detach and self-destruct. 4214b8374a7SPoul-Henning Kamp */ 422dd84a43cSPoul-Henning Kamp 423dd84a43cSPoul-Henning Kamp static void 424b1876192SPoul-Henning Kamp g_dev_orphan(struct g_consumer *cp) 425dd84a43cSPoul-Henning Kamp { 426dd84a43cSPoul-Henning Kamp struct g_geom *gp; 42789c9c53dSPoul-Henning Kamp struct cdev *dev; 4288c24ef5fSPoul-Henning Kamp u_int unit; 429dd84a43cSPoul-Henning Kamp 430dd84a43cSPoul-Henning Kamp g_topology_assert(); 431df6c9fe9SPoul-Henning Kamp gp = cp->geom; 432dd84a43cSPoul-Henning Kamp dev = gp->softc; 433df6c9fe9SPoul-Henning Kamp g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, gp->name); 434df6c9fe9SPoul-Henning Kamp 435df6c9fe9SPoul-Henning Kamp /* Reset any dump-area set on this device */ 43695c24b31SPoul-Henning Kamp if (dev->si_flags & SI_DUMPDEV) 43795c24b31SPoul-Henning Kamp set_dumper(NULL); 438df6c9fe9SPoul-Henning Kamp 43989c9c53dSPoul-Henning Kamp /* Destroy the struct cdev *so we get no more requests */ 4408c24ef5fSPoul-Henning Kamp unit = dev2unit(dev); 441dd84a43cSPoul-Henning Kamp destroy_dev(dev); 4428c24ef5fSPoul-Henning Kamp free_unr(unithdr, unit); 443df6c9fe9SPoul-Henning Kamp 444df6c9fe9SPoul-Henning Kamp /* Wait for the cows to come home */ 445df6c9fe9SPoul-Henning Kamp while (cp->nstart != cp->nend) 4464d70511aSJohn Baldwin pause("gdevorphan", hz / 10); 447df6c9fe9SPoul-Henning Kamp 448dd84a43cSPoul-Henning Kamp if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 449d2bae332SPoul-Henning Kamp g_access(cp, -cp->acr, -cp->acw, -cp->ace); 450df6c9fe9SPoul-Henning Kamp 451503abe45SPoul-Henning Kamp g_detach(cp); 452dd84a43cSPoul-Henning Kamp g_destroy_consumer(cp); 453dd84a43cSPoul-Henning Kamp g_destroy_geom(gp); 454dd84a43cSPoul-Henning Kamp } 455dd84a43cSPoul-Henning Kamp 4564b8374a7SPoul-Henning Kamp DECLARE_GEOM_CLASS(g_dev_class, g_dev); 457