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 36dd84a43cSPoul-Henning Kamp /* 37dd84a43cSPoul-Henning Kamp * XXX: How do we in general know that objects referenced in events 38dd84a43cSPoul-Henning Kamp * have not been destroyed before we get around to handle the event ? 39dd84a43cSPoul-Henning Kamp */ 40dd84a43cSPoul-Henning Kamp 4150b1faefSDavid E. O'Brien #include <sys/cdefs.h> 4250b1faefSDavid E. O'Brien __FBSDID("$FreeBSD$"); 4350b1faefSDavid E. O'Brien 44dd84a43cSPoul-Henning Kamp #include <sys/param.h> 45dd84a43cSPoul-Henning Kamp #include <sys/malloc.h> 46dd84a43cSPoul-Henning Kamp #include <sys/systm.h> 47dd84a43cSPoul-Henning Kamp #include <sys/kernel.h> 48dd84a43cSPoul-Henning Kamp #include <sys/lock.h> 49dd84a43cSPoul-Henning Kamp #include <sys/mutex.h> 509197ce2eSPoul-Henning Kamp #include <sys/proc.h> 51dd84a43cSPoul-Henning Kamp #include <sys/errno.h> 52dd84a43cSPoul-Henning Kamp #include <sys/time.h> 53dd84a43cSPoul-Henning Kamp #include <geom/geom.h> 54b1876192SPoul-Henning Kamp #include <geom/geom_int.h> 55dd84a43cSPoul-Henning Kamp 569197ce2eSPoul-Henning Kamp #include <machine/stdarg.h> 579197ce2eSPoul-Henning Kamp 58a974614bSPoul-Henning Kamp TAILQ_HEAD(event_tailq_head, g_event); 59a974614bSPoul-Henning Kamp 60dd84a43cSPoul-Henning Kamp static struct event_tailq_head g_events = TAILQ_HEAD_INITIALIZER(g_events); 61abb50a48SPoul-Henning Kamp static u_int g_pending_events; 62dd84a43cSPoul-Henning Kamp static TAILQ_HEAD(,g_provider) g_doorstep = TAILQ_HEAD_INITIALIZER(g_doorstep); 63903e43feSPoul-Henning Kamp static struct mtx g_eventlock; 641b464bd8SPoul-Henning Kamp static int g_wither_work; 65dd84a43cSPoul-Henning Kamp 66a974614bSPoul-Henning Kamp #define G_N_EVENTREFS 20 67a974614bSPoul-Henning Kamp 68a974614bSPoul-Henning Kamp struct g_event { 69a974614bSPoul-Henning Kamp TAILQ_ENTRY(g_event) events; 70a974614bSPoul-Henning Kamp g_event_t *func; 710a9c130cSPoul-Henning Kamp void *arg; 720a9c130cSPoul-Henning Kamp int flag; 73a974614bSPoul-Henning Kamp void *ref[G_N_EVENTREFS]; 74a974614bSPoul-Henning Kamp }; 75a974614bSPoul-Henning Kamp 760a9c130cSPoul-Henning Kamp #define EV_DONE 0x80000 770a9c130cSPoul-Henning Kamp #define EV_WAKEUP 0x40000 78c8589ad1SPoul-Henning Kamp #define EV_CANCELED 0x20000 7959ccfe81SMatt Jacob #define EV_INPROGRESS 0x10000 800a9c130cSPoul-Henning Kamp 81dd84a43cSPoul-Henning Kamp void 82503abe45SPoul-Henning Kamp g_waitidle(void) 83dd84a43cSPoul-Henning Kamp { 84dd84a43cSPoul-Henning Kamp 859197ce2eSPoul-Henning Kamp g_topology_assert_not(); 869197ce2eSPoul-Henning Kamp mtx_assert(&Giant, MA_NOTOWNED); 879197ce2eSPoul-Henning Kamp 88e4da09c0SPoul-Henning Kamp mtx_lock(&g_eventlock); 89e4da09c0SPoul-Henning Kamp while (!TAILQ_EMPTY(&g_events)) 90e4da09c0SPoul-Henning Kamp msleep(&g_pending_events, &g_eventlock, PPAUSE, 91e4da09c0SPoul-Henning Kamp "g_waitidle", hz/5); 92e4da09c0SPoul-Henning Kamp mtx_unlock(&g_eventlock); 939197ce2eSPoul-Henning Kamp curthread->td_pflags &= ~TDP_GEOM; 94dd84a43cSPoul-Henning Kamp } 95dd84a43cSPoul-Henning Kamp 96e4da09c0SPoul-Henning Kamp #if 0 97dd84a43cSPoul-Henning Kamp void 98b8005b9bSPawel Jakub Dawidek g_waitidlelock(void) 99b8005b9bSPawel Jakub Dawidek { 100b8005b9bSPawel Jakub Dawidek 101b8005b9bSPawel Jakub Dawidek g_topology_assert(); 102e4da09c0SPoul-Henning Kamp mtx_lock(&g_eventlock); 103e4da09c0SPoul-Henning Kamp while (!TAILQ_EMPTY(&g_events)) { 104b8005b9bSPawel Jakub Dawidek g_topology_unlock(); 105e4da09c0SPoul-Henning Kamp msleep(&g_pending_events, &g_eventlock, PPAUSE, 106e4da09c0SPoul-Henning Kamp "g_waitidlel", hz/5); 107b8005b9bSPawel Jakub Dawidek g_topology_lock(); 108b8005b9bSPawel Jakub Dawidek } 109e4da09c0SPoul-Henning Kamp mtx_unlock(&g_eventlock); 110b8005b9bSPawel Jakub Dawidek } 111e4da09c0SPoul-Henning Kamp #endif 112b8005b9bSPawel Jakub Dawidek 113b8005b9bSPawel Jakub Dawidek void 114dd84a43cSPoul-Henning Kamp g_orphan_provider(struct g_provider *pp, int error) 115dd84a43cSPoul-Henning Kamp { 116dd84a43cSPoul-Henning Kamp 1173d1d5bc3SPoul-Henning Kamp /* G_VALID_PROVIDER(pp) We likely lack topology lock */ 118dd84a43cSPoul-Henning Kamp g_trace(G_T_TOPOLOGY, "g_orphan_provider(%p(%s), %d)", 119dd84a43cSPoul-Henning Kamp pp, pp->name, error); 120dd84a43cSPoul-Henning Kamp KASSERT(error != 0, 121dd84a43cSPoul-Henning Kamp ("g_orphan_provider(%p(%s), 0) error must be non-zero\n", 122dd84a43cSPoul-Henning Kamp pp, pp->name)); 123d0265773SPoul-Henning Kamp 124dd84a43cSPoul-Henning Kamp pp->error = error; 125903e43feSPoul-Henning Kamp mtx_lock(&g_eventlock); 126d0265773SPoul-Henning Kamp KASSERT(!(pp->flags & G_PF_ORPHAN), 127d0265773SPoul-Henning Kamp ("g_orphan_provider(%p(%s)), already an orphan", pp, pp->name)); 128d0265773SPoul-Henning Kamp pp->flags |= G_PF_ORPHAN; 129dd84a43cSPoul-Henning Kamp TAILQ_INSERT_TAIL(&g_doorstep, pp, orphan); 130903e43feSPoul-Henning Kamp mtx_unlock(&g_eventlock); 131dd84a43cSPoul-Henning Kamp wakeup(&g_wait_event); 132dd84a43cSPoul-Henning Kamp } 133dd84a43cSPoul-Henning Kamp 134dd84a43cSPoul-Henning Kamp /* 135dd84a43cSPoul-Henning Kamp * This function is called once on each provider which the event handler 136dd84a43cSPoul-Henning Kamp * finds on its g_doorstep. 137dd84a43cSPoul-Henning Kamp */ 138dd84a43cSPoul-Henning Kamp 139dd84a43cSPoul-Henning Kamp static void 140b1876192SPoul-Henning Kamp g_orphan_register(struct g_provider *pp) 141dd84a43cSPoul-Henning Kamp { 142dd84a43cSPoul-Henning Kamp struct g_consumer *cp, *cp2; 1438592d7a7SPoul-Henning Kamp int wf; 144dd84a43cSPoul-Henning Kamp 145dd84a43cSPoul-Henning Kamp g_topology_assert(); 1463d1d5bc3SPoul-Henning Kamp G_VALID_PROVIDER(pp); 1473d1d5bc3SPoul-Henning Kamp g_trace(G_T_TOPOLOGY, "g_orphan_register(%s)", pp->name); 148dd84a43cSPoul-Henning Kamp 1493ea5d7ecSPawel Jakub Dawidek g_cancel_event(pp); 1503ea5d7ecSPawel Jakub Dawidek 1518592d7a7SPoul-Henning Kamp wf = pp->flags & G_PF_WITHER; 1528592d7a7SPoul-Henning Kamp pp->flags &= ~G_PF_WITHER; 1538592d7a7SPoul-Henning Kamp 154dd84a43cSPoul-Henning Kamp /* 155dd84a43cSPoul-Henning Kamp * Tell all consumers the bad news. 156f48b8819SPoul-Henning Kamp * Don't be surprised if they self-destruct. 157dd84a43cSPoul-Henning Kamp */ 158dd84a43cSPoul-Henning Kamp cp = LIST_FIRST(&pp->consumers); 159dd84a43cSPoul-Henning Kamp while (cp != NULL) { 160dd84a43cSPoul-Henning Kamp cp2 = LIST_NEXT(cp, consumers); 16107d77fc6SPoul-Henning Kamp KASSERT(cp->geom->orphan != NULL, 16207d77fc6SPoul-Henning Kamp ("geom %s has no orphan, class %s", 16307d77fc6SPoul-Henning Kamp cp->geom->name, cp->geom->class->name)); 16407d77fc6SPoul-Henning Kamp cp->geom->orphan(cp); 165dd84a43cSPoul-Henning Kamp cp = cp2; 166dd84a43cSPoul-Henning Kamp } 1678592d7a7SPoul-Henning Kamp if (LIST_EMPTY(&pp->consumers) && wf) 168b144e6ffSPoul-Henning Kamp g_destroy_provider(pp); 1698592d7a7SPoul-Henning Kamp else 1708592d7a7SPoul-Henning Kamp pp->flags |= wf; 17120d2026bSPoul-Henning Kamp #ifdef notyet 172e5829909SPoul-Henning Kamp cp = LIST_FIRST(&pp->consumers); 173e5829909SPoul-Henning Kamp if (cp != NULL) 174e5829909SPoul-Henning Kamp return; 175e5829909SPoul-Henning Kamp if (pp->geom->flags & G_GEOM_WITHER) 176e5829909SPoul-Henning Kamp g_destroy_provider(pp); 17720d2026bSPoul-Henning Kamp #endif 178dd84a43cSPoul-Henning Kamp } 179dd84a43cSPoul-Henning Kamp 180dd84a43cSPoul-Henning Kamp static int 181b1876192SPoul-Henning Kamp one_event(void) 182dd84a43cSPoul-Henning Kamp { 183dd84a43cSPoul-Henning Kamp struct g_event *ep; 184dd84a43cSPoul-Henning Kamp struct g_provider *pp; 185dd84a43cSPoul-Henning Kamp 186f7842e00SJaakko Heinonen g_topology_assert(); 187903e43feSPoul-Henning Kamp mtx_lock(&g_eventlock); 188d6b910d2SPawel Jakub Dawidek TAILQ_FOREACH(pp, &g_doorstep, orphan) { 189d6b910d2SPawel Jakub Dawidek if (pp->nstart == pp->nend) 190d6b910d2SPawel Jakub Dawidek break; 191d6b910d2SPawel Jakub Dawidek } 1923d1d5bc3SPoul-Henning Kamp if (pp != NULL) { 1933d1d5bc3SPoul-Henning Kamp G_VALID_PROVIDER(pp); 194dd84a43cSPoul-Henning Kamp TAILQ_REMOVE(&g_doorstep, pp, orphan); 195903e43feSPoul-Henning Kamp mtx_unlock(&g_eventlock); 196b1876192SPoul-Henning Kamp g_orphan_register(pp); 197f7842e00SJaakko Heinonen return (1); 198dd84a43cSPoul-Henning Kamp } 199f7842e00SJaakko Heinonen 200dd84a43cSPoul-Henning Kamp ep = TAILQ_FIRST(&g_events); 201dd84a43cSPoul-Henning Kamp if (ep == NULL) { 202e4da09c0SPoul-Henning Kamp wakeup(&g_pending_events); 203dd84a43cSPoul-Henning Kamp return (0); 204dd84a43cSPoul-Henning Kamp } 20559ccfe81SMatt Jacob if (ep->flag & EV_INPROGRESS) { 20659ccfe81SMatt Jacob mtx_unlock(&g_eventlock); 20759ccfe81SMatt Jacob return (1); 20859ccfe81SMatt Jacob } 20959ccfe81SMatt Jacob ep->flag |= EV_INPROGRESS; 210346cd5feSPoul-Henning Kamp mtx_unlock(&g_eventlock); 211d98777f8SPoul-Henning Kamp g_topology_assert(); 212d98777f8SPoul-Henning Kamp ep->func(ep->arg, 0); 213d98777f8SPoul-Henning Kamp g_topology_assert(); 214e4da09c0SPoul-Henning Kamp mtx_lock(&g_eventlock); 215e4da09c0SPoul-Henning Kamp TAILQ_REMOVE(&g_events, ep, events); 21659ccfe81SMatt Jacob ep->flag &= ~EV_INPROGRESS; 2170a9c130cSPoul-Henning Kamp if (ep->flag & EV_WAKEUP) { 2180a9c130cSPoul-Henning Kamp ep->flag |= EV_DONE; 2199d142a6eSJaakko Heinonen mtx_unlock(&g_eventlock); 2200a9c130cSPoul-Henning Kamp wakeup(ep); 2210a9c130cSPoul-Henning Kamp } else { 2229d142a6eSJaakko Heinonen mtx_unlock(&g_eventlock); 2239dfffbc9SPoul-Henning Kamp g_free(ep); 2240a9c130cSPoul-Henning Kamp } 225dd84a43cSPoul-Henning Kamp return (1); 226dd84a43cSPoul-Henning Kamp } 227dd84a43cSPoul-Henning Kamp 228dd84a43cSPoul-Henning Kamp void 229b1876192SPoul-Henning Kamp g_run_events() 230dd84a43cSPoul-Henning Kamp { 2311b464bd8SPoul-Henning Kamp int i; 232dd84a43cSPoul-Henning Kamp 233f7842e00SJaakko Heinonen for (;;) { 234f7842e00SJaakko Heinonen g_topology_lock(); 235b1876192SPoul-Henning Kamp while (one_event()) 236dd84a43cSPoul-Henning Kamp ; 237f7842e00SJaakko Heinonen mtx_assert(&g_eventlock, MA_OWNED); 2381b464bd8SPoul-Henning Kamp i = g_wither_work; 239f7842e00SJaakko Heinonen if (i) { 240f7842e00SJaakko Heinonen mtx_unlock(&g_eventlock); 2411b464bd8SPoul-Henning Kamp while (i) { 2421b464bd8SPoul-Henning Kamp i = g_wither_washer(); 2431b464bd8SPoul-Henning Kamp g_wither_work = i & 1; 2441b464bd8SPoul-Henning Kamp i &= 2; 2451b464bd8SPoul-Henning Kamp } 2461b464bd8SPoul-Henning Kamp g_topology_unlock(); 247f7842e00SJaakko Heinonen } else { 248f7842e00SJaakko Heinonen g_topology_unlock(); 249f7842e00SJaakko Heinonen msleep(&g_wait_event, &g_eventlock, PRIBIO | PDROP, 250f7842e00SJaakko Heinonen "-", 0); 251f7842e00SJaakko Heinonen } 252f7842e00SJaakko Heinonen } 253f7842e00SJaakko Heinonen /* NOTREACHED */ 254dd84a43cSPoul-Henning Kamp } 255dd84a43cSPoul-Henning Kamp 256dd84a43cSPoul-Henning Kamp void 257afcbcfaeSPoul-Henning Kamp g_cancel_event(void *ref) 258dddc28bfSPoul-Henning Kamp { 259dddc28bfSPoul-Henning Kamp struct g_event *ep, *epn; 2602ab31b05SPoul-Henning Kamp struct g_provider *pp; 261afcbcfaeSPoul-Henning Kamp u_int n; 262dddc28bfSPoul-Henning Kamp 263dddc28bfSPoul-Henning Kamp mtx_lock(&g_eventlock); 2642ab31b05SPoul-Henning Kamp TAILQ_FOREACH(pp, &g_doorstep, orphan) { 2652ab31b05SPoul-Henning Kamp if (pp != ref) 2662ab31b05SPoul-Henning Kamp continue; 2672ab31b05SPoul-Henning Kamp TAILQ_REMOVE(&g_doorstep, pp, orphan); 2682ab31b05SPoul-Henning Kamp break; 2692ab31b05SPoul-Henning Kamp } 270e4da09c0SPoul-Henning Kamp TAILQ_FOREACH_SAFE(ep, &g_events, events, epn) { 27159ccfe81SMatt Jacob if (ep->flag & EV_INPROGRESS) 27259ccfe81SMatt Jacob continue; 273afcbcfaeSPoul-Henning Kamp for (n = 0; n < G_N_EVENTREFS; n++) { 274afcbcfaeSPoul-Henning Kamp if (ep->ref[n] == NULL) 275afcbcfaeSPoul-Henning Kamp break; 276e4da09c0SPoul-Henning Kamp if (ep->ref[n] != ref) 277e4da09c0SPoul-Henning Kamp continue; 278dddc28bfSPoul-Henning Kamp TAILQ_REMOVE(&g_events, ep, events); 279316aed03SPoul-Henning Kamp ep->func(ep->arg, EV_CANCEL); 280e4da09c0SPoul-Henning Kamp mtx_assert(&g_eventlock, MA_OWNED); 2810a9c130cSPoul-Henning Kamp if (ep->flag & EV_WAKEUP) { 282e4da09c0SPoul-Henning Kamp ep->flag |= (EV_DONE|EV_CANCELED); 2830a9c130cSPoul-Henning Kamp wakeup(ep); 2840a9c130cSPoul-Henning Kamp } else { 2859dfffbc9SPoul-Henning Kamp g_free(ep); 2860a9c130cSPoul-Henning Kamp } 287afcbcfaeSPoul-Henning Kamp break; 288dddc28bfSPoul-Henning Kamp } 289afcbcfaeSPoul-Henning Kamp } 290e4da09c0SPoul-Henning Kamp if (TAILQ_EMPTY(&g_events)) 291e4da09c0SPoul-Henning Kamp wakeup(&g_pending_events); 292dddc28bfSPoul-Henning Kamp mtx_unlock(&g_eventlock); 293dddc28bfSPoul-Henning Kamp } 294dddc28bfSPoul-Henning Kamp 2950a9c130cSPoul-Henning Kamp static int 296793ffa8eSPoul-Henning Kamp g_post_event_x(g_event_t *func, void *arg, int flag, int wuflag, struct g_event **epp, va_list ap) 297346cd5feSPoul-Henning Kamp { 298346cd5feSPoul-Henning Kamp struct g_event *ep; 299afcbcfaeSPoul-Henning Kamp void *p; 300afcbcfaeSPoul-Henning Kamp u_int n; 301346cd5feSPoul-Henning Kamp 302793ffa8eSPoul-Henning Kamp g_trace(G_T_TOPOLOGY, "g_post_event_x(%p, %p, %d, %d)", 303d246aa55SPawel Jakub Dawidek func, arg, flag, wuflag); 304793ffa8eSPoul-Henning Kamp KASSERT(wuflag == 0 || wuflag == EV_WAKEUP, 305793ffa8eSPoul-Henning Kamp ("Wrong wuflag in g_post_event_x(0x%x)", wuflag)); 3068cd1535aSPoul-Henning Kamp ep = g_malloc(sizeof *ep, flag | M_ZERO); 307346cd5feSPoul-Henning Kamp if (ep == NULL) 308346cd5feSPoul-Henning Kamp return (ENOMEM); 309793ffa8eSPoul-Henning Kamp ep->flag = wuflag; 310afcbcfaeSPoul-Henning Kamp for (n = 0; n < G_N_EVENTREFS; n++) { 311afcbcfaeSPoul-Henning Kamp p = va_arg(ap, void *); 312afcbcfaeSPoul-Henning Kamp if (p == NULL) 313afcbcfaeSPoul-Henning Kamp break; 314afcbcfaeSPoul-Henning Kamp g_trace(G_T_TOPOLOGY, " ref %p", p); 315e0d617c1SPoul-Henning Kamp ep->ref[n] = p; 316afcbcfaeSPoul-Henning Kamp } 317afcbcfaeSPoul-Henning Kamp KASSERT(p == NULL, ("Too many references to event")); 318346cd5feSPoul-Henning Kamp ep->func = func; 319346cd5feSPoul-Henning Kamp ep->arg = arg; 320346cd5feSPoul-Henning Kamp mtx_lock(&g_eventlock); 321346cd5feSPoul-Henning Kamp TAILQ_INSERT_TAIL(&g_events, ep, events); 322346cd5feSPoul-Henning Kamp mtx_unlock(&g_eventlock); 323346cd5feSPoul-Henning Kamp wakeup(&g_wait_event); 3240a9c130cSPoul-Henning Kamp if (epp != NULL) 3250a9c130cSPoul-Henning Kamp *epp = ep; 3269197ce2eSPoul-Henning Kamp curthread->td_pflags |= TDP_GEOM; 3270a9c130cSPoul-Henning Kamp return (0); 3280a9c130cSPoul-Henning Kamp } 3290a9c130cSPoul-Henning Kamp 3300a9c130cSPoul-Henning Kamp int 3310a9c130cSPoul-Henning Kamp g_post_event(g_event_t *func, void *arg, int flag, ...) 3320a9c130cSPoul-Henning Kamp { 3330a9c130cSPoul-Henning Kamp va_list ap; 334a1a9b445SPoul-Henning Kamp int i; 3350a9c130cSPoul-Henning Kamp 3360a9c130cSPoul-Henning Kamp KASSERT(flag == M_WAITOK || flag == M_NOWAIT, 3370a9c130cSPoul-Henning Kamp ("Wrong flag to g_post_event")); 338a1a9b445SPoul-Henning Kamp va_start(ap, flag); 339793ffa8eSPoul-Henning Kamp i = g_post_event_x(func, arg, flag, 0, NULL, ap); 340a1a9b445SPoul-Henning Kamp va_end(ap); 341a1a9b445SPoul-Henning Kamp return (i); 3420a9c130cSPoul-Henning Kamp } 3430a9c130cSPoul-Henning Kamp 3441b464bd8SPoul-Henning Kamp void 345f7842e00SJaakko Heinonen g_do_wither() 346f7842e00SJaakko Heinonen { 3471b464bd8SPoul-Henning Kamp 348f7842e00SJaakko Heinonen mtx_lock(&g_eventlock); 3491b464bd8SPoul-Henning Kamp g_wither_work = 1; 350f7842e00SJaakko Heinonen mtx_unlock(&g_eventlock); 3511b464bd8SPoul-Henning Kamp wakeup(&g_wait_event); 3521b464bd8SPoul-Henning Kamp } 3530a9c130cSPoul-Henning Kamp 3540a9c130cSPoul-Henning Kamp /* 3550a9c130cSPoul-Henning Kamp * XXX: It might actually be useful to call this function with topology held. 3560a9c130cSPoul-Henning Kamp * XXX: This would ensure that the event gets created before anything else 3570a9c130cSPoul-Henning Kamp * XXX: changes. At present all users have a handle on things in some other 3580a9c130cSPoul-Henning Kamp * XXX: way, so this remains an XXX for now. 3590a9c130cSPoul-Henning Kamp */ 3600a9c130cSPoul-Henning Kamp 3610a9c130cSPoul-Henning Kamp int 3620a9c130cSPoul-Henning Kamp g_waitfor_event(g_event_t *func, void *arg, int flag, ...) 3630a9c130cSPoul-Henning Kamp { 3640a9c130cSPoul-Henning Kamp va_list ap; 3650a9c130cSPoul-Henning Kamp struct g_event *ep; 3660a9c130cSPoul-Henning Kamp int error; 3670a9c130cSPoul-Henning Kamp 36818e88d82SPawel Jakub Dawidek g_topology_assert_not(); 3690a9c130cSPoul-Henning Kamp KASSERT(flag == M_WAITOK || flag == M_NOWAIT, 3700a9c130cSPoul-Henning Kamp ("Wrong flag to g_post_event")); 371a1a9b445SPoul-Henning Kamp va_start(ap, flag); 372793ffa8eSPoul-Henning Kamp error = g_post_event_x(func, arg, flag, EV_WAKEUP, &ep, ap); 373a1a9b445SPoul-Henning Kamp va_end(ap); 3740a9c130cSPoul-Henning Kamp if (error) 3750a9c130cSPoul-Henning Kamp return (error); 3769d142a6eSJaakko Heinonen 3779d142a6eSJaakko Heinonen mtx_lock(&g_eventlock); 3789d142a6eSJaakko Heinonen while (!(ep->flag & EV_DONE)) 3799d142a6eSJaakko Heinonen msleep(ep, &g_eventlock, PRIBIO, "g_waitfor_event", hz); 380c8589ad1SPoul-Henning Kamp if (ep->flag & EV_CANCELED) 381c8589ad1SPoul-Henning Kamp error = EAGAIN; 3829d142a6eSJaakko Heinonen mtx_unlock(&g_eventlock); 3839d142a6eSJaakko Heinonen 3849dfffbc9SPoul-Henning Kamp g_free(ep); 385c8589ad1SPoul-Henning Kamp return (error); 386346cd5feSPoul-Henning Kamp } 387346cd5feSPoul-Henning Kamp 388dd84a43cSPoul-Henning Kamp void 389dd84a43cSPoul-Henning Kamp g_event_init() 390dd84a43cSPoul-Henning Kamp { 391dd84a43cSPoul-Henning Kamp 392903e43feSPoul-Henning Kamp mtx_init(&g_eventlock, "GEOM orphanage", NULL, MTX_DEF); 393dd84a43cSPoul-Henning Kamp } 394