g_uzip_wrkthr.c revision 303167 
1/*-
2 * Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/sys/geom/uzip/g_uzip_wrkthr.c 303167 2016-07-21 23:49:26Z sobomax $");
29
30#include <sys/types.h>
31#include <sys/param.h>
32#include <sys/lock.h>
33#include <sys/mutex.h>
34#include <sys/bio.h>
35#include <sys/systm.h>
36#include <sys/proc.h>
37#include <sys/sched.h>
38#include <sys/kthread.h>
39#include <sys/malloc.h>
40
41#include <geom/uzip/g_uzip.h>
42#include <geom/uzip/g_uzip_softc.h>
43#include <geom/uzip/g_uzip_wrkthr.h>
44
45void
46g_uzip_wrkthr(void *arg)
47{
48	struct g_uzip_softc *sc;
49	struct bio *bp;
50
51	sc = (struct g_uzip_softc *)arg;
52	thread_lock(curthread);
53	sched_prio(curthread, PRIBIO);
54	thread_unlock(curthread);
55
56	for (;;) {
57		mtx_lock(&sc->queue_mtx);
58		if (sc->wrkthr_flags & GUZ_SHUTDOWN) {
59			sc->wrkthr_flags |= GUZ_EXITING;
60			mtx_unlock(&sc->queue_mtx);
61			kproc_exit(0);
62		}
63		bp = bioq_takefirst(&sc->bio_queue);
64		if (!bp) {
65			msleep(sc, &sc->queue_mtx, PRIBIO | PDROP,
66			    "wrkwait", 0);
67			continue;
68		}
69		mtx_unlock(&sc->queue_mtx);
70		sc->uzip_do(sc, bp);
71	}
72}
73