freebsd-dev/sys/cam/ctl/ctl_frontend.c
Pedro F. Giffuni 0699955838 cam: make some use of mallocarray(9).
Focus on code where we are doing multiplications within malloc(9). None of
these ire likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.

This initial sweep only covers malloc(9) calls with M_NOWAIT. No good
reason but I started doing the changes before r327796 and at that time it
was convenient to make sure the sorrounding code could handle NULL values.

X-Differential revision: https://reviews.freebsd.org/D13837
2018-01-15 21:15:25 +00:00

392 lines
11 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Silicon Graphics International Corp.
* Copyright (c) 2014-2017 Alexander Motin <mav@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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $
*/
/*
* CAM Target Layer front end interface code
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/endian.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_da.h>
#include <cam/ctl/ctl_io.h>
#include <cam/ctl/ctl.h>
#include <cam/ctl/ctl_frontend.h>
#include <cam/ctl/ctl_backend.h>
/* XXX KDM move defines from ctl_ioctl.h to somewhere else */
#include <cam/ctl/ctl_ioctl.h>
#include <cam/ctl/ctl_ha.h>
#include <cam/ctl/ctl_private.h>
#include <cam/ctl/ctl_debug.h>
extern struct ctl_softc *control_softc;
int
ctl_frontend_register(struct ctl_frontend *fe)
{
struct ctl_softc *softc = control_softc;
struct ctl_frontend *fe_tmp;
int error;
KASSERT(softc != NULL, ("CTL is not initialized"));
/* Sanity check, make sure this isn't a duplicate registration. */
mtx_lock(&softc->ctl_lock);
STAILQ_FOREACH(fe_tmp, &softc->fe_list, links) {
if (strcmp(fe_tmp->name, fe->name) == 0) {
mtx_unlock(&softc->ctl_lock);
return (-1);
}
}
mtx_unlock(&softc->ctl_lock);
STAILQ_INIT(&fe->port_list);
/* Call the frontend's initialization routine. */
if (fe->init != NULL) {
if ((error = fe->init()) != 0) {
printf("%s frontend init error: %d\n",
fe->name, error);
return (error);
}
}
mtx_lock(&softc->ctl_lock);
softc->num_frontends++;
STAILQ_INSERT_TAIL(&softc->fe_list, fe, links);
mtx_unlock(&softc->ctl_lock);
return (0);
}
int
ctl_frontend_deregister(struct ctl_frontend *fe)
{
struct ctl_softc *softc = control_softc;
int error;
/* Call the frontend's shutdown routine.*/
if (fe->shutdown != NULL) {
if ((error = fe->shutdown()) != 0) {
printf("%s frontend shutdown error: %d\n",
fe->name, error);
return (error);
}
}
mtx_lock(&softc->ctl_lock);
STAILQ_REMOVE(&softc->fe_list, fe, ctl_frontend, links);
softc->num_frontends--;
mtx_unlock(&softc->ctl_lock);
return (0);
}
struct ctl_frontend *
ctl_frontend_find(char *frontend_name)
{
struct ctl_softc *softc = control_softc;
struct ctl_frontend *fe;
mtx_lock(&softc->ctl_lock);
STAILQ_FOREACH(fe, &softc->fe_list, links) {
if (strcmp(fe->name, frontend_name) == 0) {
mtx_unlock(&softc->ctl_lock);
return (fe);
}
}
mtx_unlock(&softc->ctl_lock);
return (NULL);
}
int
ctl_port_register(struct ctl_port *port)
{
struct ctl_softc *softc = control_softc;
struct ctl_port *tport, *nport;
void *pool;
int port_num;
int retval;
KASSERT(softc != NULL, ("CTL is not initialized"));
port->ctl_softc = softc;
mtx_lock(&softc->ctl_lock);
if (port->targ_port >= 0)
port_num = port->targ_port;
else
port_num = ctl_ffz(softc->ctl_port_mask,
softc->port_min, softc->port_max);
if ((port_num < 0) ||
(ctl_set_mask(softc->ctl_port_mask, port_num) < 0)) {
mtx_unlock(&softc->ctl_lock);
return (1);
}
softc->num_ports++;
mtx_unlock(&softc->ctl_lock);
/*
* Initialize the initiator and portname mappings
*/
port->max_initiators = CTL_MAX_INIT_PER_PORT;
port->wwpn_iid = mallocarray(port->max_initiators,
sizeof(*port->wwpn_iid), M_CTL, M_NOWAIT | M_ZERO);
if (port->wwpn_iid == NULL) {
retval = ENOMEM;
goto error;
}
/*
* We add 20 to whatever the caller requests, so he doesn't get
* burned by queueing things back to the pending sense queue. In
* theory, there should probably only be one outstanding item, at
* most, on the pending sense queue for a LUN. We'll clear the
* pending sense queue on the next command, whether or not it is
* a REQUEST SENSE.
*/
retval = ctl_pool_create(softc, port->port_name,
port->num_requested_ctl_io + 20, &pool);
if (retval != 0) {
free(port->wwpn_iid, M_CTL);
error:
port->targ_port = -1;
mtx_lock(&softc->ctl_lock);
ctl_clear_mask(softc->ctl_port_mask, port_num);
mtx_unlock(&softc->ctl_lock);
return (retval);
}
port->targ_port = port_num;
port->ctl_pool_ref = pool;
if (port->options.stqh_first == NULL)
STAILQ_INIT(&port->options);
port->stats.item = port_num;
mtx_init(&port->port_lock, "CTL port", NULL, MTX_DEF);
mtx_lock(&softc->ctl_lock);
STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links);
for (tport = NULL, nport = STAILQ_FIRST(&softc->port_list);
nport != NULL && nport->targ_port < port_num;
tport = nport, nport = STAILQ_NEXT(tport, links)) {
}
if (tport)
STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links);
else
STAILQ_INSERT_HEAD(&softc->port_list, port, links);
softc->ctl_ports[port->targ_port] = port;
mtx_unlock(&softc->ctl_lock);
return (retval);
}
int
ctl_port_deregister(struct ctl_port *port)
{
struct ctl_softc *softc = port->ctl_softc;
struct ctl_io_pool *pool = (struct ctl_io_pool *)port->ctl_pool_ref;
int i;
if (port->targ_port == -1)
return (1);
mtx_lock(&softc->ctl_lock);
STAILQ_REMOVE(&softc->port_list, port, ctl_port, links);
STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links);
softc->num_ports--;
ctl_clear_mask(softc->ctl_port_mask, port->targ_port);
softc->ctl_ports[port->targ_port] = NULL;
mtx_unlock(&softc->ctl_lock);
ctl_pool_free(pool);
ctl_free_opts(&port->options);
ctl_lun_map_deinit(port);
free(port->port_devid, M_CTL);
port->port_devid = NULL;
free(port->target_devid, M_CTL);
port->target_devid = NULL;
free(port->init_devid, M_CTL);
port->init_devid = NULL;
for (i = 0; i < port->max_initiators; i++)
free(port->wwpn_iid[i].name, M_CTL);
free(port->wwpn_iid, M_CTL);
mtx_destroy(&port->port_lock);
return (0);
}
void
ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
int wwpn_valid, uint64_t wwpn)
{
struct scsi_vpd_id_descriptor *desc;
int len, proto;
if (port->port_type == CTL_PORT_FC)
proto = SCSI_PROTO_FC << 4;
else if (port->port_type == CTL_PORT_SAS)
proto = SCSI_PROTO_SAS << 4;
else if (port->port_type == CTL_PORT_ISCSI)
proto = SCSI_PROTO_ISCSI << 4;
else
proto = SCSI_PROTO_SPI << 4;
if (wwnn_valid) {
port->wwnn = wwnn;
free(port->target_devid, M_CTL);
len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
port->target_devid = malloc(sizeof(struct ctl_devid) + len,
M_CTL, M_WAITOK | M_ZERO);
port->target_devid->len = len;
desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
SVPD_ID_TYPE_NAA;
desc->length = CTL_WWPN_LEN;
scsi_u64to8b(port->wwnn, desc->identifier);
}
if (wwpn_valid) {
port->wwpn = wwpn;
free(port->port_devid, M_CTL);
len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
port->port_devid = malloc(sizeof(struct ctl_devid) + len,
M_CTL, M_WAITOK | M_ZERO);
port->port_devid->len = len;
desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
SVPD_ID_TYPE_NAA;
desc->length = CTL_WWPN_LEN;
scsi_u64to8b(port->wwpn, desc->identifier);
}
}
void
ctl_port_online(struct ctl_port *port)
{
struct ctl_softc *softc = port->ctl_softc;
struct ctl_lun *lun;
const char *value;
uint32_t l;
if (port->lun_enable != NULL) {
if (port->lun_map) {
for (l = 0; l < port->lun_map_size; l++) {
if (ctl_lun_map_from_port(port, l) ==
UINT32_MAX)
continue;
port->lun_enable(port->targ_lun_arg, l);
}
} else {
STAILQ_FOREACH(lun, &softc->lun_list, links)
port->lun_enable(port->targ_lun_arg, lun->lun);
}
}
if (port->port_online != NULL)
port->port_online(port->onoff_arg);
mtx_lock(&softc->ctl_lock);
if (softc->is_single == 0) {
value = ctl_get_opt(&port->options, "ha_shared");
if (value != NULL && strcmp(value, "on") == 0)
port->status |= CTL_PORT_STATUS_HA_SHARED;
else
port->status &= ~CTL_PORT_STATUS_HA_SHARED;
}
port->status |= CTL_PORT_STATUS_ONLINE;
STAILQ_FOREACH(lun, &softc->lun_list, links) {
if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX)
continue;
mtx_lock(&lun->lun_lock);
ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
mtx_unlock(&lun->lun_lock);
}
mtx_unlock(&softc->ctl_lock);
ctl_isc_announce_port(port);
}
void
ctl_port_offline(struct ctl_port *port)
{
struct ctl_softc *softc = port->ctl_softc;
struct ctl_lun *lun;
uint32_t l;
if (port->port_offline != NULL)
port->port_offline(port->onoff_arg);
if (port->lun_disable != NULL) {
if (port->lun_map) {
for (l = 0; l < port->lun_map_size; l++) {
if (ctl_lun_map_from_port(port, l) ==
UINT32_MAX)
continue;
port->lun_disable(port->targ_lun_arg, l);
}
} else {
STAILQ_FOREACH(lun, &softc->lun_list, links)
port->lun_disable(port->targ_lun_arg, lun->lun);
}
}
mtx_lock(&softc->ctl_lock);
port->status &= ~CTL_PORT_STATUS_ONLINE;
STAILQ_FOREACH(lun, &softc->lun_list, links) {
if (ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX)
continue;
mtx_lock(&lun->lun_lock);
ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
mtx_unlock(&lun->lun_lock);
}
mtx_unlock(&softc->ctl_lock);
ctl_isc_announce_port(port);
}
/*
* vim: ts=8
*/