diff options
Diffstat (limited to 'tools/regression/geom/geom_simdev.c')
| -rw-r--r-- | tools/regression/geom/geom_simdev.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/tools/regression/geom/geom_simdev.c b/tools/regression/geom/geom_simdev.c new file mode 100644 index 0000000..290c8c5 --- /dev/null +++ b/tools/regression/geom/geom_simdev.c @@ -0,0 +1,159 @@ +/*- + * Copyright (c) 2002 Poul-Henning Kamp + * Copyright (c) 2002 Networks Associates Technology, Inc. + * All rights reserved. + * + * This software was developed for the FreeBSD Project by Poul-Henning Kamp + * and NAI Labs, the Security Research Division of Network Associates, Inc. + * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the + * DARPA CHATS research program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the authors may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + + +#include <sys/param.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> +#include <signal.h> +#include <err.h> +#include <sys/errno.h> +#include <sys/time.h> +#include <geom/geom.h> + + +static struct g_geom * +dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused) +{ + struct g_geom *gp; + struct g_consumer *cp; + + g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name); + g_topology_assert(); + LIST_FOREACH(cp, &pp->consumers, consumers) { + if (cp->geom->class == mp) { + g_topology_unlock(); + return (NULL); + } + } + gp = g_new_geomf(mp, pp->name); + cp = g_new_consumer(gp); + g_attach(cp, pp); + return (gp); +} + + +static void +g_dev_orphan(struct g_consumer *cp) +{ + struct g_geom *gp; + + gp = cp->geom; + gp->flags |= G_GEOM_WITHER; + g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, gp->name); + if (cp->biocount > 0) + return; + if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) + g_access_rel(cp, -cp->acr, -cp->acw, -cp->ace); + g_dettach(cp); + g_destroy_consumer(cp); + g_destroy_geom(gp); +} + + +static struct g_class dev_class = { + "DEV-class", + dev_taste, + NULL, + g_dev_orphan, + NULL, + G_CLASS_INITSTUFF +}; + +static struct g_geom * +g_dev_findg(char *name) +{ + struct g_geom *gp; + + LIST_FOREACH(gp, &dev_class.geom, geom) + if (!strcmp(gp->name, name)) + break; + return (gp); +} + +void +g_dev_init(void *junk __unused) +{ + + g_add_class(&dev_class); +} + + +struct g_consumer * +g_dev_opendev(char *name, int r, int w, int e) +{ + struct g_geom *gp; + struct g_consumer *cp; + int error; + + gp = g_dev_findg(name); + if (gp == NULL) + return (NULL); + g_topology_lock(); + cp = LIST_FIRST(&gp->consumer); + error = g_access_rel(cp, r, w, e); + g_topology_unlock(); + if (error) + return(NULL); + return(cp); +} + +static void +g_dev_done(struct bio *bp) +{ + + if (bp->bio_from->biocount > 0) + return; + g_topology_lock(); + g_dev_orphan(bp->bio_from); + g_topology_unlock(); +} + +int +g_dev_request(char *name, struct bio *bp) +{ + struct g_geom *gp; + + gp = g_dev_findg(name); + if (gp == NULL) + return (-1); + bp->bio_done = g_dev_done; + g_io_request(bp, LIST_FIRST(&gp->consumer)); + return (1); +} |
