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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/ralfw/rt2561s/@/geom/nop/g_nop.c |
/*-
* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/geom/nop/g_nop.c 223921 2011-07-11 05:22:31Z ae $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/nop/g_nop.h>
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, nop, CTLFLAG_RW, 0, "GEOM_NOP stuff");
static u_int g_nop_debug = 0;
SYSCTL_UINT(_kern_geom_nop, OID_AUTO, debug, CTLFLAG_RW, &g_nop_debug, 0,
"Debug level");
static int g_nop_destroy(struct g_geom *gp, boolean_t force);
static int g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp);
static void g_nop_config(struct gctl_req *req, struct g_class *mp,
const char *verb);
static void g_nop_dumpconf(struct sbuf *sb, const char *indent,
struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
struct g_class g_nop_class = {
.name = G_NOP_CLASS_NAME,
.version = G_VERSION,
.ctlreq = g_nop_config,
.destroy_geom = g_nop_destroy_geom
};
static void
g_nop_orphan(struct g_consumer *cp)
{
g_topology_assert();
g_nop_destroy(cp->geom, 1);
}
static void
g_nop_start(struct bio *bp)
{
struct g_nop_softc *sc;
struct g_geom *gp;
struct g_provider *pp;
struct bio *cbp;
u_int failprob = 0;
gp = bp->bio_to->geom;
sc = gp->softc;
G_NOP_LOGREQ(bp, "Request received.");
switch (bp->bio_cmd) {
case BIO_READ:
sc->sc_reads++;
sc->sc_readbytes += bp->bio_length;
failprob = sc->sc_rfailprob;
break;
case BIO_WRITE:
sc->sc_writes++;
sc->sc_wrotebytes += bp->bio_length;
failprob = sc->sc_wfailprob;
break;
}
if (failprob > 0) {
u_int rval;
rval = arc4random() % 100;
if (rval < failprob) {
G_NOP_LOGREQ(bp, "Returning error=%d.", sc->sc_error);
g_io_deliver(bp, sc->sc_error);
return;
}
}
cbp = g_clone_bio(bp);
if (cbp == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
cbp->bio_done = g_std_done;
cbp->bio_offset = bp->bio_offset + sc->sc_offset;
cbp->bio_data = bp->bio_data;
cbp->bio_length = bp->bio_length;
pp = LIST_FIRST(&gp->provider);
KASSERT(pp != NULL, ("NULL pp"));
cbp->bio_to = pp;
G_NOP_LOGREQ(cbp, "Sending request.");
g_io_request(cbp, LIST_FIRST(&gp->consumer));
}
static int
g_nop_access(struct g_provider *pp, int dr, int dw, int de)
{
struct g_geom *gp;
struct g_consumer *cp;
int error;
gp = pp->geom;
cp = LIST_FIRST(&gp->consumer);
error = g_access(cp, dr, dw, de);
return (error);
}
static int
g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
int ioerror, u_int rfailprob, u_int wfailprob, off_t offset, off_t size,
u_int secsize)
{
struct g_nop_softc *sc;
struct g_geom *gp;
struct g_provider *newpp;
struct g_consumer *cp;
char name[64];
int error;
g_topology_assert();
gp = NULL;
newpp = NULL;
cp = NULL;
if ((offset % pp->sectorsize) != 0) {
gctl_error(req, "Invalid offset for provider %s.", pp->name);
return (EINVAL);
}
if ((size % pp->sectorsize) != 0) {
gctl_error(req, "Invalid size for provider %s.", pp->name);
return (EINVAL);
}
if (offset >= pp->mediasize) {
gctl_error(req, "Invalid offset for provider %s.", pp->name);
return (EINVAL);
}
if (size == 0)
size = pp->mediasize - offset;
if (offset + size > pp->mediasize) {
gctl_error(req, "Invalid size for provider %s.", pp->name);
return (EINVAL);
}
if (secsize == 0)
secsize = pp->sectorsize;
else if ((secsize % pp->sectorsize) != 0) {
gctl_error(req, "Invalid secsize for provider %s.", pp->name);
return (EINVAL);
}
if (secsize > MAXPHYS) {
gctl_error(req, "secsize is too big.");
return (EINVAL);
}
size -= size % secsize;
snprintf(name, sizeof(name), "%s%s", pp->name, G_NOP_SUFFIX);
LIST_FOREACH(gp, &mp->geom, geom) {
if (strcmp(gp->name, name) == 0) {
gctl_error(req, "Provider %s already exists.", name);
return (EEXIST);
}
}
gp = g_new_geomf(mp, name);
sc = g_malloc(sizeof(*sc), M_WAITOK);
sc->sc_offset = offset;
sc->sc_error = ioerror;
sc->sc_rfailprob = rfailprob;
sc->sc_wfailprob = wfailprob;
sc->sc_reads = 0;
sc->sc_writes = 0;
sc->sc_readbytes = 0;
sc->sc_wrotebytes = 0;
gp->softc = sc;
gp->start = g_nop_start;
gp->orphan = g_nop_orphan;
gp->access = g_nop_access;
gp->dumpconf = g_nop_dumpconf;
newpp = g_new_providerf(gp, gp->name);
newpp->mediasize = size;
newpp->sectorsize = secsize;
cp = g_new_consumer(gp);
error = g_attach(cp, pp);
if (error != 0) {
gctl_error(req, "Cannot attach to provider %s.", pp->name);
goto fail;
}
g_error_provider(newpp, 0);
G_NOP_DEBUG(0, "Device %s created.", gp->name);
return (0);
fail:
if (cp->provider != NULL)
g_detach(cp);
g_destroy_consumer(cp);
g_destroy_provider(newpp);
g_free(gp->softc);
g_destroy_geom(gp);
return (error);
}
static int
g_nop_destroy(struct g_geom *gp, boolean_t force)
{
struct g_provider *pp;
g_topology_assert();
if (gp->softc == NULL)
return (ENXIO);
pp = LIST_FIRST(&gp->provider);
if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
if (force) {
G_NOP_DEBUG(0, "Device %s is still open, so it "
"can't be definitely removed.", pp->name);
} else {
G_NOP_DEBUG(1, "Device %s is still open (r%dw%de%d).",
pp->name, pp->acr, pp->acw, pp->ace);
return (EBUSY);
}
} else {
G_NOP_DEBUG(0, "Device %s removed.", gp->name);
}
g_free(gp->softc);
gp->softc = NULL;
g_wither_geom(gp, ENXIO);
return (0);
}
static int
g_nop_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp)
{
return (g_nop_destroy(gp, 0));
}
static void
g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
{
struct g_provider *pp;
intmax_t *error, *rfailprob, *wfailprob, *offset, *secsize, *size;
const char *name;
char param[16];
int i, *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
error = gctl_get_paraml(req, "error", sizeof(*error));
if (error == NULL) {
gctl_error(req, "No '%s' argument", "error");
return;
}
rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob));
if (rfailprob == NULL) {
gctl_error(req, "No '%s' argument", "rfailprob");
return;
}
if (*rfailprob < -1 || *rfailprob > 100) {
gctl_error(req, "Invalid '%s' argument", "rfailprob");
return;
}
wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob));
if (wfailprob == NULL) {
gctl_error(req, "No '%s' argument", "wfailprob");
return;
}
if (*wfailprob < -1 || *wfailprob > 100) {
gctl_error(req, "Invalid '%s' argument", "wfailprob");
return;
}
offset = gctl_get_paraml(req, "offset", sizeof(*offset));
if (offset == NULL) {
gctl_error(req, "No '%s' argument", "offset");
return;
}
if (*offset < 0) {
gctl_error(req, "Invalid '%s' argument", "offset");
return;
}
size = gctl_get_paraml(req, "size", sizeof(*size));
if (size == NULL) {
gctl_error(req, "No '%s' argument", "size");
return;
}
if (*size < 0) {
gctl_error(req, "Invalid '%s' argument", "size");
return;
}
secsize = gctl_get_paraml(req, "secsize", sizeof(*secsize));
if (secsize == NULL) {
gctl_error(req, "No '%s' argument", "secsize");
return;
}
if (*secsize < 0) {
gctl_error(req, "Invalid '%s' argument", "secsize");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", i);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL) {
G_NOP_DEBUG(1, "Provider %s is invalid.", name);
gctl_error(req, "Provider %s is invalid.", name);
return;
}
if (g_nop_create(req, mp, pp,
*error == -1 ? EIO : (int)*error,
*rfailprob == -1 ? 0 : (u_int)*rfailprob,
*wfailprob == -1 ? 0 : (u_int)*wfailprob,
(off_t)*offset, (off_t)*size, (u_int)*secsize) != 0) {
return;
}
}
}
static void
g_nop_ctl_configure(struct gctl_req *req, struct g_class *mp)
{
struct g_nop_softc *sc;
struct g_provider *pp;
intmax_t *error, *rfailprob, *wfailprob;
const char *name;
char param[16];
int i, *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
error = gctl_get_paraml(req, "error", sizeof(*error));
if (error == NULL) {
gctl_error(req, "No '%s' argument", "error");
return;
}
rfailprob = gctl_get_paraml(req, "rfailprob", sizeof(*rfailprob));
if (rfailprob == NULL) {
gctl_error(req, "No '%s' argument", "rfailprob");
return;
}
if (*rfailprob < -1 || *rfailprob > 100) {
gctl_error(req, "Invalid '%s' argument", "rfailprob");
return;
}
wfailprob = gctl_get_paraml(req, "wfailprob", sizeof(*wfailprob));
if (wfailprob == NULL) {
gctl_error(req, "No '%s' argument", "wfailprob");
return;
}
if (*wfailprob < -1 || *wfailprob > 100) {
gctl_error(req, "Invalid '%s' argument", "wfailprob");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", i);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL || pp->geom->class != mp) {
G_NOP_DEBUG(1, "Provider %s is invalid.", name);
gctl_error(req, "Provider %s is invalid.", name);
return;
}
sc = pp->geom->softc;
if (*error != -1)
sc->sc_error = (int)*error;
if (*rfailprob != -1)
sc->sc_rfailprob = (u_int)*rfailprob;
if (*wfailprob != -1)
sc->sc_wfailprob = (u_int)*wfailprob;
}
}
static struct g_geom *
g_nop_find_geom(struct g_class *mp, const char *name)
{
struct g_geom *gp;
LIST_FOREACH(gp, &mp->geom, geom) {
if (strcmp(gp->name, name) == 0)
return (gp);
}
return (NULL);
}
static void
g_nop_ctl_destroy(struct gctl_req *req, struct g_class *mp)
{
int *nargs, *force, error, i;
struct g_geom *gp;
const char *name;
char param[16];
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No 'force' argument");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", i);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
gp = g_nop_find_geom(mp, name);
if (gp == NULL) {
G_NOP_DEBUG(1, "Device %s is invalid.", name);
gctl_error(req, "Device %s is invalid.", name);
return;
}
error = g_nop_destroy(gp, *force);
if (error != 0) {
gctl_error(req, "Cannot destroy device %s (error=%d).",
gp->name, error);
return;
}
}
}
static void
g_nop_ctl_reset(struct gctl_req *req, struct g_class *mp)
{
struct g_nop_softc *sc;
struct g_provider *pp;
const char *name;
char param[16];
int i, *nargs;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument", "nargs");
return;
}
if (*nargs <= 0) {
gctl_error(req, "Missing device(s).");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%d' argument", i);
return;
}
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
name += strlen("/dev/");
pp = g_provider_by_name(name);
if (pp == NULL || pp->geom->class != mp) {
G_NOP_DEBUG(1, "Provider %s is invalid.", name);
gctl_error(req, "Provider %s is invalid.", name);
return;
}
sc = pp->geom->softc;
sc->sc_reads = 0;
sc->sc_writes = 0;
sc->sc_readbytes = 0;
sc->sc_wrotebytes = 0;
}
}
static void
g_nop_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
uint32_t *version;
g_topology_assert();
version = gctl_get_paraml(req, "version", sizeof(*version));
if (version == NULL) {
gctl_error(req, "No '%s' argument.", "version");
return;
}
if (*version != G_NOP_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
if (strcmp(verb, "create") == 0) {
g_nop_ctl_create(req, mp);
return;
} else if (strcmp(verb, "configure") == 0) {
g_nop_ctl_configure(req, mp);
return;
} else if (strcmp(verb, "destroy") == 0) {
g_nop_ctl_destroy(req, mp);
return;
} else if (strcmp(verb, "reset") == 0) {
g_nop_ctl_reset(req, mp);
return;
}
gctl_error(req, "Unknown verb.");
}
static void
g_nop_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp, struct g_provider *pp)
{
struct g_nop_softc *sc;
if (pp != NULL || cp != NULL)
return;
sc = gp->softc;
sbuf_printf(sb, "%s<Offset>%jd</Offset>\n", indent,
(intmax_t)sc->sc_offset);
sbuf_printf(sb, "%s<ReadFailProb>%u</ReadFailProb>\n", indent,
sc->sc_rfailprob);
sbuf_printf(sb, "%s<WriteFailProb>%u</WriteFailProb>\n", indent,
sc->sc_wfailprob);
sbuf_printf(sb, "%s<Error>%d</Error>\n", indent, sc->sc_error);
sbuf_printf(sb, "%s<Reads>%ju</Reads>\n", indent, sc->sc_reads);
sbuf_printf(sb, "%s<Writes>%ju</Writes>\n", indent, sc->sc_writes);
sbuf_printf(sb, "%s<ReadBytes>%ju</ReadBytes>\n", indent,
sc->sc_readbytes);
sbuf_printf(sb, "%s<WroteBytes>%ju</WroteBytes>\n", indent,
sc->sc_wrotebytes);
}
DECLARE_GEOM_CLASS(g_nop_class, g_nop);