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/* $OpenBSD: mpath_sym.c,v 1.18 2013/09/03 06:39:04 dlg Exp $ */
/*
* Copyright (c) 2010 David Gwynne <dlg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/queue.h>
#include <sys/rwlock.h>
#include <sys/pool.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/selinfo.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <scsi/mpathvar.h>
struct sym_softc {
struct device sc_dev;
struct mpath_path sc_path;
};
#define DEVNAME(_s) ((_s)->sc_dev.dv_xname)
int sym_match(struct device *, void *, void *);
void sym_attach(struct device *, struct device *, void *);
int sym_detach(struct device *, int);
int sym_activate(struct device *, int);
struct cfattach sym_ca = {
sizeof(struct sym_softc),
sym_match,
sym_attach,
sym_detach,
sym_activate
};
struct cfdriver sym_cd = {
NULL,
"sym",
DV_DULL
};
void sym_mpath_start(struct scsi_xfer *);
int sym_mpath_checksense(struct scsi_xfer *);
void sym_mpath_status(struct scsi_link *);
const struct mpath_ops sym_mpath_sym_ops = {
"sym",
sym_mpath_checksense,
sym_mpath_status
};
const struct mpath_ops sym_mpath_asym_ops = {
"sym",
sym_mpath_checksense,
sym_mpath_status
};
struct sym_device {
char *vendor;
char *product;
};
struct sym_device sym_devices[] = {
/* " vendor " " device " */
/* "01234567" "0123456789012345" */
{ "TOSHIBA ", "MBF" },
{ "SEAGATE ", "ST" },
{ "FUJITSU ", "MBD" },
{ "FUJITSU ", "MA" }
};
struct sym_device asym_devices[] = {
/* " vendor " " device " */
/* "01234567" "0123456789012345" */
{ "DELL ", "MD1220 " },
{ "DELL ", "MD3060e " },
{ "SUN ", "StorEdge 3510F D" },
{ "Transtec", "PROVIGO1100" },
{ "NetBSD", "NetBSD iSCSI" }
};
int
sym_match(struct device *parent, void *match, void *aux)
{
struct scsi_attach_args *sa = aux;
struct scsi_inquiry_data *inq = sa->sa_inqbuf;
struct sym_device *s;
int i;
if (mpath_path_probe(sa->sa_sc_link) != 0)
return (0);
for (i = 0; i < nitems(sym_devices); i++) {
s = &sym_devices[i];
if (bcmp(s->vendor, inq->vendor, strlen(s->vendor)) == 0 &&
bcmp(s->product, inq->product, strlen(s->product)) == 0)
return (8);
}
for (i = 0; i < nitems(asym_devices); i++) {
s = &asym_devices[i];
if (bcmp(s->vendor, inq->vendor, strlen(s->vendor)) == 0 &&
bcmp(s->product, inq->product, strlen(s->product)) == 0)
return (8);
}
return (0);
}
void
sym_attach(struct device *parent, struct device *self, void *aux)
{
struct sym_softc *sc = (struct sym_softc *)self;
struct scsi_attach_args *sa = aux;
struct scsi_link *link = sa->sa_sc_link;
struct scsi_inquiry_data *inq = sa->sa_inqbuf;
const struct mpath_ops *ops = &sym_mpath_sym_ops;
struct sym_device *s;
u_int id = 0;
int i;
printf("\n");
/* check if we're an assymetric access device */
for (i = 0; i < nitems(asym_devices); i++) {
s = &asym_devices[i];
if (bcmp(s->vendor, inq->vendor, strlen(s->vendor)) == 0 &&
bcmp(s->product, inq->product, strlen(s->product)) == 0) {
ops = &sym_mpath_asym_ops;
id = sc->sc_dev.dv_unit;
break;
}
}
/* init link */
link->device_softc = sc;
/* init path */
scsi_xsh_set(&sc->sc_path.p_xsh, link, sym_mpath_start);
sc->sc_path.p_link = link;
if (mpath_path_attach(&sc->sc_path, id, ops) != 0)
printf("%s: unable to attach path\n", DEVNAME(sc));
}
int
sym_detach(struct device *self, int flags)
{
return (0);
}
int
sym_activate(struct device *self, int act)
{
struct sym_softc *sc = (struct sym_softc *)self;
int rv = 0;
switch (act) {
case DVACT_SUSPEND:
case DVACT_RESUME:
break;
case DVACT_DEACTIVATE:
if (sc->sc_path.p_group != NULL)
mpath_path_detach(&sc->sc_path);
break;
}
return (rv);
}
void
sym_mpath_start(struct scsi_xfer *xs)
{
struct sym_softc *sc = xs->sc_link->device_softc;
mpath_start(&sc->sc_path, xs);
}
int
sym_mpath_checksense(struct scsi_xfer *xs)
{
return (MPATH_SENSE_DECLINED);
}
void
sym_mpath_status(struct scsi_link *link)
{
struct sym_softc *sc = link->device_softc;
mpath_path_status(&sc->sc_path, MPATH_S_ACTIVE);
}
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