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freebsd-skq/usr.sbin/ctld/ctld.c
trasz 18bde13fd9 English. 
Sponsored by:	The FreeBSD Foundation
2014-04-16 11:07:29 +00:00

1919 lines
45 KiB
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/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* 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 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/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ctld.h"
bool proxy_mode = false;
static volatile bool sighup_received = false;
static volatile bool sigterm_received = false;
static volatile bool sigalrm_received = false;
static int nchildren = 0;
static void
usage(void)
{
fprintf(stderr, "usage: ctld [-d][-f config-file]\n");
exit(1);
}
char *
checked_strdup(const char *s)
{
char *c;
c = strdup(s);
if (c == NULL)
log_err(1, "strdup");
return (c);
}
struct conf *
conf_new(void)
{
struct conf *conf;
conf = calloc(1, sizeof(*conf));
if (conf == NULL)
log_err(1, "calloc");
TAILQ_INIT(&conf->conf_targets);
TAILQ_INIT(&conf->conf_auth_groups);
TAILQ_INIT(&conf->conf_portal_groups);
conf->conf_debug = 0;
conf->conf_timeout = 60;
conf->conf_maxproc = 30;
return (conf);
}
void
conf_delete(struct conf *conf)
{
struct target *targ, *tmp;
struct auth_group *ag, *cagtmp;
struct portal_group *pg, *cpgtmp;
assert(conf->conf_pidfh == NULL);
TAILQ_FOREACH_SAFE(targ, &conf->conf_targets, t_next, tmp)
target_delete(targ);
TAILQ_FOREACH_SAFE(ag, &conf->conf_auth_groups, ag_next, cagtmp)
auth_group_delete(ag);
TAILQ_FOREACH_SAFE(pg, &conf->conf_portal_groups, pg_next, cpgtmp)
portal_group_delete(pg);
free(conf->conf_pidfile_path);
free(conf);
}
static struct auth *
auth_new(struct auth_group *ag)
{
struct auth *auth;
auth = calloc(1, sizeof(*auth));
if (auth == NULL)
log_err(1, "calloc");
auth->a_auth_group = ag;
TAILQ_INSERT_TAIL(&ag->ag_auths, auth, a_next);
return (auth);
}
static void
auth_delete(struct auth *auth)
{
TAILQ_REMOVE(&auth->a_auth_group->ag_auths, auth, a_next);
free(auth->a_user);
free(auth->a_secret);
free(auth->a_mutual_user);
free(auth->a_mutual_secret);
free(auth);
}
const struct auth *
auth_find(const struct auth_group *ag, const char *user)
{
const struct auth *auth;
TAILQ_FOREACH(auth, &ag->ag_auths, a_next) {
if (strcmp(auth->a_user, user) == 0)
return (auth);
}
return (NULL);
}
static void
auth_check_secret_length(struct auth *auth)
{
size_t len;
len = strlen(auth->a_secret);
if (len > 16) {
if (auth->a_auth_group->ag_name != NULL)
log_warnx("secret for user \"%s\", auth-group \"%s\", "
"is too long; it should be at most 16 characters "
"long", auth->a_user, auth->a_auth_group->ag_name);
else
log_warnx("secret for user \"%s\", target \"%s\", "
"is too long; it should be at most 16 characters "
"long", auth->a_user,
auth->a_auth_group->ag_target->t_name);
}
if (len < 12) {
if (auth->a_auth_group->ag_name != NULL)
log_warnx("secret for user \"%s\", auth-group \"%s\", "
"is too short; it should be at least 12 characters "
"long", auth->a_user,
auth->a_auth_group->ag_name);
else
log_warnx("secret for user \"%s\", target \"%s\", "
"is too short; it should be at least 16 characters "
"long", auth->a_user,
auth->a_auth_group->ag_target->t_name);
}
if (auth->a_mutual_secret != NULL) {
len = strlen(auth->a_secret);
if (len > 16) {
if (auth->a_auth_group->ag_name != NULL)
log_warnx("mutual secret for user \"%s\", "
"auth-group \"%s\", is too long; it should "
"be at most 16 characters long",
auth->a_user, auth->a_auth_group->ag_name);
else
log_warnx("mutual secret for user \"%s\", "
"target \"%s\", is too long; it should "
"be at most 16 characters long",
auth->a_user,
auth->a_auth_group->ag_target->t_name);
}
if (len < 12) {
if (auth->a_auth_group->ag_name != NULL)
log_warnx("mutual secret for user \"%s\", "
"auth-group \"%s\", is too short; it "
"should be at least 12 characters long",
auth->a_user, auth->a_auth_group->ag_name);
else
log_warnx("mutual secret for user \"%s\", "
"target \"%s\", is too short; it should be "
"at least 16 characters long",
auth->a_user,
auth->a_auth_group->ag_target->t_name);
}
}
}
const struct auth *
auth_new_chap(struct auth_group *ag, const char *user,
const char *secret)
{
struct auth *auth;
if (ag->ag_type == AG_TYPE_UNKNOWN)
ag->ag_type = AG_TYPE_CHAP;
if (ag->ag_type != AG_TYPE_CHAP) {
if (ag->ag_name != NULL)
log_warnx("cannot mix \"chap\" authentication with "
"other types for auth-group \"%s\"", ag->ag_name);
else
log_warnx("cannot mix \"chap\" authentication with "
"other types for target \"%s\"",
ag->ag_target->t_name);
return (NULL);
}
auth = auth_new(ag);
auth->a_user = checked_strdup(user);
auth->a_secret = checked_strdup(secret);
auth_check_secret_length(auth);
return (auth);
}
const struct auth *
auth_new_chap_mutual(struct auth_group *ag, const char *user,
const char *secret, const char *user2, const char *secret2)
{
struct auth *auth;
if (ag->ag_type == AG_TYPE_UNKNOWN)
ag->ag_type = AG_TYPE_CHAP_MUTUAL;
if (ag->ag_type != AG_TYPE_CHAP_MUTUAL) {
if (ag->ag_name != NULL)
log_warnx("cannot mix \"chap-mutual\" authentication "
"with other types for auth-group \"%s\"",
ag->ag_name);
else
log_warnx("cannot mix \"chap-mutual\" authentication "
"with other types for target \"%s\"",
ag->ag_target->t_name);
return (NULL);
}
auth = auth_new(ag);
auth->a_user = checked_strdup(user);
auth->a_secret = checked_strdup(secret);
auth->a_mutual_user = checked_strdup(user2);
auth->a_mutual_secret = checked_strdup(secret2);
auth_check_secret_length(auth);
return (auth);
}
const struct auth_name *
auth_name_new(struct auth_group *ag, const char *name)
{
struct auth_name *an;
an = calloc(1, sizeof(*an));
if (an == NULL)
log_err(1, "calloc");
an->an_auth_group = ag;
an->an_initator_name = checked_strdup(name);
TAILQ_INSERT_TAIL(&ag->ag_names, an, an_next);
return (an);
}
static void
auth_name_delete(struct auth_name *an)
{
TAILQ_REMOVE(&an->an_auth_group->ag_names, an, an_next);
free(an->an_initator_name);
free(an);
}
bool
auth_name_defined(const struct auth_group *ag)
{
if (TAILQ_EMPTY(&ag->ag_names))
return (false);
return (true);
}
const struct auth_name *
auth_name_find(const struct auth_group *ag, const char *name)
{
const struct auth_name *auth_name;
TAILQ_FOREACH(auth_name, &ag->ag_names, an_next) {
if (strcmp(auth_name->an_initator_name, name) == 0)
return (auth_name);
}
return (NULL);
}
const struct auth_portal *
auth_portal_new(struct auth_group *ag, const char *portal)
{
struct auth_portal *ap;
ap = calloc(1, sizeof(*ap));
if (ap == NULL)
log_err(1, "calloc");
ap->ap_auth_group = ag;
ap->ap_initator_portal = checked_strdup(portal);
TAILQ_INSERT_TAIL(&ag->ag_portals, ap, ap_next);
return (ap);
}
static void
auth_portal_delete(struct auth_portal *ap)
{
TAILQ_REMOVE(&ap->ap_auth_group->ag_portals, ap, ap_next);
free(ap->ap_initator_portal);
free(ap);
}
bool
auth_portal_defined(const struct auth_group *ag)
{
if (TAILQ_EMPTY(&ag->ag_portals))
return (false);
return (true);
}
const struct auth_portal *
auth_portal_find(const struct auth_group *ag, const char *portal)
{
const struct auth_portal *auth_portal;
TAILQ_FOREACH(auth_portal, &ag->ag_portals, ap_next) {
if (strcmp(auth_portal->ap_initator_portal, portal) == 0)
return (auth_portal);
}
return (NULL);
}
struct auth_group *
auth_group_new(struct conf *conf, const char *name)
{
struct auth_group *ag;
if (name != NULL) {
ag = auth_group_find(conf, name);
if (ag != NULL) {
log_warnx("duplicated auth-group \"%s\"", name);
return (NULL);
}
}
ag = calloc(1, sizeof(*ag));
if (ag == NULL)
log_err(1, "calloc");
if (name != NULL)
ag->ag_name = checked_strdup(name);
TAILQ_INIT(&ag->ag_auths);
TAILQ_INIT(&ag->ag_names);
TAILQ_INIT(&ag->ag_portals);
ag->ag_conf = conf;
TAILQ_INSERT_TAIL(&conf->conf_auth_groups, ag, ag_next);
return (ag);
}
void
auth_group_delete(struct auth_group *ag)
{
struct auth *auth, *auth_tmp;
struct auth_name *auth_name, *auth_name_tmp;
struct auth_portal *auth_portal, *auth_portal_tmp;
TAILQ_REMOVE(&ag->ag_conf->conf_auth_groups, ag, ag_next);
TAILQ_FOREACH_SAFE(auth, &ag->ag_auths, a_next, auth_tmp)
auth_delete(auth);
TAILQ_FOREACH_SAFE(auth_name, &ag->ag_names, an_next, auth_name_tmp)
auth_name_delete(auth_name);
TAILQ_FOREACH_SAFE(auth_portal, &ag->ag_portals, ap_next,
auth_portal_tmp)
auth_portal_delete(auth_portal);
free(ag->ag_name);
free(ag);
}
struct auth_group *
auth_group_find(const struct conf *conf, const char *name)
{
struct auth_group *ag;
TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
if (ag->ag_name != NULL && strcmp(ag->ag_name, name) == 0)
return (ag);
}
return (NULL);
}
static int
auth_group_set_type(struct auth_group *ag, int type)
{
if (ag->ag_type == AG_TYPE_UNKNOWN) {
ag->ag_type = type;
return (0);
}
if (ag->ag_type == type)
return (0);
return (1);
}
int
auth_group_set_type_str(struct auth_group *ag, const char *str)
{
int error, type;
if (strcmp(str, "none") == 0) {
type = AG_TYPE_NO_AUTHENTICATION;
} else if (strcmp(str, "deny") == 0) {
type = AG_TYPE_DENY;
} else if (strcmp(str, "chap") == 0) {
type = AG_TYPE_CHAP;
} else if (strcmp(str, "chap-mutual") == 0) {
type = AG_TYPE_CHAP_MUTUAL;
} else {
if (ag->ag_name != NULL)
log_warnx("invalid auth-type \"%s\" for auth-group "
"\"%s\"", str, ag->ag_name);
else
log_warnx("invalid auth-type \"%s\" for target "
"\"%s\"", str, ag->ag_target->t_name);
return (1);
}
error = auth_group_set_type(ag, type);
if (error != 0) {
if (ag->ag_name != NULL)
log_warnx("cannot set auth-type to \"%s\" for "
"auth-group \"%s\"; already has a different "
"type", str, ag->ag_name);
else
log_warnx("cannot set auth-type to \"%s\" for target "
"\"%s\"; already has a different type",
str, ag->ag_target->t_name);
return (1);
}
return (error);
}
static struct portal *
portal_new(struct portal_group *pg)
{
struct portal *portal;
portal = calloc(1, sizeof(*portal));
if (portal == NULL)
log_err(1, "calloc");
TAILQ_INIT(&portal->p_targets);
portal->p_portal_group = pg;
TAILQ_INSERT_TAIL(&pg->pg_portals, portal, p_next);
return (portal);
}
static void
portal_delete(struct portal *portal)
{
TAILQ_REMOVE(&portal->p_portal_group->pg_portals, portal, p_next);
freeaddrinfo(portal->p_ai);
free(portal->p_listen);
free(portal);
}
struct portal_group *
portal_group_new(struct conf *conf, const char *name)
{
struct portal_group *pg;
pg = portal_group_find(conf, name);
if (pg != NULL) {
log_warnx("duplicated portal-group \"%s\"", name);
return (NULL);
}
pg = calloc(1, sizeof(*pg));
if (pg == NULL)
log_err(1, "calloc");
pg->pg_name = checked_strdup(name);
TAILQ_INIT(&pg->pg_portals);
pg->pg_conf = conf;
conf->conf_last_portal_group_tag++;
pg->pg_tag = conf->conf_last_portal_group_tag;
TAILQ_INSERT_TAIL(&conf->conf_portal_groups, pg, pg_next);
return (pg);
}
void
portal_group_delete(struct portal_group *pg)
{
struct portal *portal, *tmp;
TAILQ_REMOVE(&pg->pg_conf->conf_portal_groups, pg, pg_next);
TAILQ_FOREACH_SAFE(portal, &pg->pg_portals, p_next, tmp)
portal_delete(portal);
free(pg->pg_name);
free(pg);
}
struct portal_group *
portal_group_find(const struct conf *conf, const char *name)
{
struct portal_group *pg;
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
if (strcmp(pg->pg_name, name) == 0)
return (pg);
}
return (NULL);
}
int
portal_group_add_listen(struct portal_group *pg, const char *value, bool iser)
{
struct addrinfo hints;
struct portal *portal;
char *addr, *ch, *arg;
const char *port;
int error, colons = 0;
portal = portal_new(pg);
portal->p_listen = checked_strdup(value);
portal->p_iser = iser;
arg = portal->p_listen;
if (arg[0] == '\0') {
log_warnx("empty listen address");
free(portal->p_listen);
free(portal);
return (1);
}
if (arg[0] == '[') {
/*
* IPv6 address in square brackets, perhaps with port.
*/
arg++;
addr = strsep(&arg, "]");
if (arg == NULL) {
log_warnx("invalid listen address %s",
portal->p_listen);
free(portal->p_listen);
free(portal);
return (1);
}
if (arg[0] == '\0') {
port = "3260";
} else if (arg[0] == ':') {
port = arg + 1;
} else {
log_warnx("invalid listen address %s",
portal->p_listen);
free(portal->p_listen);
free(portal);
return (1);
}
} else {
/*
* Either IPv6 address without brackets - and without
* a port - or IPv4 address. Just count the colons.
*/
for (ch = arg; *ch != '\0'; ch++) {
if (*ch == ':')
colons++;
}
if (colons > 1) {
addr = arg;
port = "3260";
} else {
addr = strsep(&arg, ":");
if (arg == NULL)
port = "3260";
else
port = arg;
}
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
error = getaddrinfo(addr, port, &hints, &portal->p_ai);
if (error != 0) {
log_warnx("getaddrinfo for %s failed: %s",
portal->p_listen, gai_strerror(error));
free(portal->p_listen);
free(portal);
return (1);
}
/*
* XXX: getaddrinfo(3) may return multiple addresses; we should turn
* those into multiple portals.
*/
return (0);
}
static bool
valid_hex(const char ch)
{
switch (ch) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 'a':
case 'A':
case 'b':
case 'B':
case 'c':
case 'C':
case 'd':
case 'D':
case 'e':
case 'E':
case 'f':
case 'F':
return (true);
default:
return (false);
}
}
bool
valid_iscsi_name(const char *name)
{
int i;
if (strlen(name) >= MAX_NAME_LEN) {
log_warnx("overlong name for target \"%s\"; max length allowed "
"by iSCSI specification is %d characters",
name, MAX_NAME_LEN);
return (false);
}
/*
* In the cases below, we don't return an error, just in case the admin
* was right, and we're wrong.
*/
if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
for (i = strlen("iqn."); name[i] != '\0'; i++) {
/*
* XXX: We should verify UTF-8 normalisation, as defined
* by 3.2.6.2: iSCSI Name Encoding.
*/
if (isalnum(name[i]))
continue;
if (name[i] == '-' || name[i] == '.' || name[i] == ':')
continue;
log_warnx("invalid character \"%c\" in target name "
"\"%s\"; allowed characters are letters, digits, "
"'-', '.', and ':'", name[i], name);
break;
}
/*
* XXX: Check more stuff: valid date and a valid reversed domain.
*/
} else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
if (strlen(name) != strlen("eui.") + 16)
log_warnx("invalid target name \"%s\"; the \"eui.\" "
"should be followed by exactly 16 hexadecimal "
"digits", name);
for (i = strlen("eui."); name[i] != '\0'; i++) {
if (!valid_hex(name[i])) {
log_warnx("invalid character \"%c\" in target "
"name \"%s\"; allowed characters are 1-9 "
"and A-F", name[i], name);
break;
}
}
} else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
if (strlen(name) > strlen("naa.") + 32)
log_warnx("invalid target name \"%s\"; the \"naa.\" "
"should be followed by at most 32 hexadecimal "
"digits", name);
for (i = strlen("naa."); name[i] != '\0'; i++) {
if (!valid_hex(name[i])) {
log_warnx("invalid character \"%c\" in target "
"name \"%s\"; allowed characters are 1-9 "
"and A-F", name[i], name);
break;
}
}
} else {
log_warnx("invalid target name \"%s\"; should start with "
"either \".iqn\", \"eui.\", or \"naa.\"",
name);
}
return (true);
}
struct target *
target_new(struct conf *conf, const char *name)
{
struct target *targ;
int i, len;
targ = target_find(conf, name);
if (targ != NULL) {
log_warnx("duplicated target \"%s\"", name);
return (NULL);
}
if (valid_iscsi_name(name) == false) {
log_warnx("target name \"%s\" is invalid", name);
return (NULL);
}
targ = calloc(1, sizeof(*targ));
if (targ == NULL)
log_err(1, "calloc");
targ->t_name = checked_strdup(name);
/*
* RFC 3722 requires us to normalize the name to lowercase.
*/
len = strlen(name);
for (i = 0; i < len; i++)
targ->t_name[i] = tolower(targ->t_name[i]);
TAILQ_INIT(&targ->t_luns);
targ->t_conf = conf;
TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
return (targ);
}
void
target_delete(struct target *targ)
{
struct lun *lun, *tmp;
TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
TAILQ_FOREACH_SAFE(lun, &targ->t_luns, l_next, tmp)
lun_delete(lun);
free(targ->t_name);
free(targ);
}
struct target *
target_find(struct conf *conf, const char *name)
{
struct target *targ;
TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
if (strcasecmp(targ->t_name, name) == 0)
return (targ);
}
return (NULL);
}
struct lun *
lun_new(struct target *targ, int lun_id)
{
struct lun *lun;
lun = lun_find(targ, lun_id);
if (lun != NULL) {
log_warnx("duplicated lun %d for target \"%s\"",
lun_id, targ->t_name);
return (NULL);
}
lun = calloc(1, sizeof(*lun));
if (lun == NULL)
log_err(1, "calloc");
lun->l_lun = lun_id;
TAILQ_INIT(&lun->l_options);
lun->l_target = targ;
TAILQ_INSERT_TAIL(&targ->t_luns, lun, l_next);
return (lun);
}
void
lun_delete(struct lun *lun)
{
struct lun_option *lo, *tmp;
TAILQ_REMOVE(&lun->l_target->t_luns, lun, l_next);
TAILQ_FOREACH_SAFE(lo, &lun->l_options, lo_next, tmp)
lun_option_delete(lo);
free(lun->l_backend);
free(lun->l_device_id);
free(lun->l_path);
free(lun->l_serial);
free(lun);
}
struct lun *
lun_find(const struct target *targ, int lun_id)
{
struct lun *lun;
TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
if (lun->l_lun == lun_id)
return (lun);
}
return (NULL);
}
void
lun_set_backend(struct lun *lun, const char *value)
{
free(lun->l_backend);
lun->l_backend = checked_strdup(value);
}
void
lun_set_blocksize(struct lun *lun, size_t value)
{
lun->l_blocksize = value;
}
void
lun_set_device_id(struct lun *lun, const char *value)
{
free(lun->l_device_id);
lun->l_device_id = checked_strdup(value);
}
void
lun_set_path(struct lun *lun, const char *value)
{
free(lun->l_path);
lun->l_path = checked_strdup(value);
}
void
lun_set_serial(struct lun *lun, const char *value)
{
free(lun->l_serial);
lun->l_serial = checked_strdup(value);
}
void
lun_set_size(struct lun *lun, size_t value)
{
lun->l_size = value;
}
void
lun_set_ctl_lun(struct lun *lun, uint32_t value)
{
lun->l_ctl_lun = value;
}
struct lun_option *
lun_option_new(struct lun *lun, const char *name, const char *value)
{
struct lun_option *lo;
lo = lun_option_find(lun, name);
if (lo != NULL) {
log_warnx("duplicated lun option %s for lun %d, target \"%s\"",
name, lun->l_lun, lun->l_target->t_name);
return (NULL);
}
lo = calloc(1, sizeof(*lo));
if (lo == NULL)
log_err(1, "calloc");
lo->lo_name = checked_strdup(name);
lo->lo_value = checked_strdup(value);
lo->lo_lun = lun;
TAILQ_INSERT_TAIL(&lun->l_options, lo, lo_next);
return (lo);
}
void
lun_option_delete(struct lun_option *lo)
{
TAILQ_REMOVE(&lo->lo_lun->l_options, lo, lo_next);
free(lo->lo_name);
free(lo->lo_value);
free(lo);
}
struct lun_option *
lun_option_find(const struct lun *lun, const char *name)
{
struct lun_option *lo;
TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
if (strcmp(lo->lo_name, name) == 0)
return (lo);
}
return (NULL);
}
void
lun_option_set(struct lun_option *lo, const char *value)
{
free(lo->lo_value);
lo->lo_value = checked_strdup(value);
}
static struct connection *
connection_new(struct portal *portal, int fd, const char *host)
{
struct connection *conn;
conn = calloc(1, sizeof(*conn));
if (conn == NULL)
log_err(1, "calloc");
conn->conn_portal = portal;
conn->conn_socket = fd;
conn->conn_initiator_addr = checked_strdup(host);
/*
* Default values, from RFC 3720, section 12.
*/
conn->conn_max_data_segment_length = 8192;
conn->conn_max_burst_length = 262144;
conn->conn_immediate_data = true;
return (conn);
}
#if 0
static void
conf_print(struct conf *conf)
{
struct auth_group *ag;
struct auth *auth;
struct auth_name *auth_name;
struct auth_portal *auth_portal;
struct portal_group *pg;
struct portal *portal;
struct target *targ;
struct lun *lun;
struct lun_option *lo;
TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
fprintf(stderr, "auth-group %s {\n", ag->ag_name);
TAILQ_FOREACH(auth, &ag->ag_auths, a_next)
fprintf(stderr, "\t chap-mutual %s %s %s %s\n",
auth->a_user, auth->a_secret,
auth->a_mutual_user, auth->a_mutual_secret);
TAILQ_FOREACH(auth_name, &ag->ag_names, an_next)
fprintf(stderr, "\t initiator-name %s\n",
auth_name->an_initator_name);
TAILQ_FOREACH(auth_portal, &ag->ag_portals, an_next)
fprintf(stderr, "\t initiator-portal %s\n",
auth_portal->an_initator_portal);
fprintf(stderr, "}\n");
}
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
fprintf(stderr, "portal-group %s {\n", pg->pg_name);
TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
fprintf(stderr, "\t listen %s\n", portal->p_listen);
fprintf(stderr, "}\n");
}
TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
fprintf(stderr, "target %s {\n", targ->t_name);
if (targ->t_alias != NULL)
fprintf(stderr, "\t alias %s\n", targ->t_alias);
TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
fprintf(stderr, "\tlun %d {\n", lun->l_lun);
fprintf(stderr, "\t\tpath %s\n", lun->l_path);
TAILQ_FOREACH(lo, &lun->l_options, lo_next)
fprintf(stderr, "\t\toption %s %s\n",
lo->lo_name, lo->lo_value);
fprintf(stderr, "\t}\n");
}
fprintf(stderr, "}\n");
}
}
#endif
static int
conf_verify_lun(struct lun *lun)
{
const struct lun *lun2;
const struct target *targ2;
if (lun->l_backend == NULL)
lun_set_backend(lun, "block");
if (strcmp(lun->l_backend, "block") == 0) {
if (lun->l_path == NULL) {
log_warnx("missing path for lun %d, target \"%s\"",
lun->l_lun, lun->l_target->t_name);
return (1);
}
} else if (strcmp(lun->l_backend, "ramdisk") == 0) {
if (lun->l_size == 0) {
log_warnx("missing size for ramdisk-backed lun %d, "
"target \"%s\"", lun->l_lun, lun->l_target->t_name);
return (1);
}
if (lun->l_path != NULL) {
log_warnx("path must not be specified "
"for ramdisk-backed lun %d, target \"%s\"",
lun->l_lun, lun->l_target->t_name);
return (1);
}
}
if (lun->l_lun < 0 || lun->l_lun > 255) {
log_warnx("invalid lun number for lun %d, target \"%s\"; "
"must be between 0 and 255", lun->l_lun,
lun->l_target->t_name);
return (1);
}
if (lun->l_blocksize == 0) {
lun_set_blocksize(lun, DEFAULT_BLOCKSIZE);
} else if (lun->l_blocksize < 0) {
log_warnx("invalid blocksize for lun %d, target \"%s\"; "
"must be larger than 0", lun->l_lun, lun->l_target->t_name);
return (1);
}
if (lun->l_size != 0 && lun->l_size % lun->l_blocksize != 0) {
log_warnx("invalid size for lun %d, target \"%s\"; "
"must be multiple of blocksize", lun->l_lun,
lun->l_target->t_name);
return (1);
}
TAILQ_FOREACH(targ2, &lun->l_target->t_conf->conf_targets, t_next) {
TAILQ_FOREACH(lun2, &targ2->t_luns, l_next) {
if (lun == lun2)
continue;
if (lun->l_path != NULL && lun2->l_path != NULL &&
strcmp(lun->l_path, lun2->l_path) == 0) {
log_debugx("WARNING: path \"%s\" duplicated "
"between lun %d, target \"%s\", and "
"lun %d, target \"%s\"", lun->l_path,
lun->l_lun, lun->l_target->t_name,
lun2->l_lun, lun2->l_target->t_name);
}
}
}
return (0);
}
int
conf_verify(struct conf *conf)
{
struct auth_group *ag;
struct portal_group *pg;
struct target *targ;
struct lun *lun;
bool found_lun;
int error;
if (conf->conf_pidfile_path == NULL)
conf->conf_pidfile_path = checked_strdup(DEFAULT_PIDFILE);
TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
if (targ->t_auth_group == NULL) {
targ->t_auth_group = auth_group_find(conf,
"default");
assert(targ->t_auth_group != NULL);
}
if (targ->t_portal_group == NULL) {
targ->t_portal_group = portal_group_find(conf,
"default");
assert(targ->t_portal_group != NULL);
}
found_lun = false;
TAILQ_FOREACH(lun, &targ->t_luns, l_next) {
error = conf_verify_lun(lun);
if (error != 0)
return (error);
found_lun = true;
}
if (!found_lun) {
log_warnx("no LUNs defined for target \"%s\"",
targ->t_name);
return (1);
}
}
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
assert(pg->pg_name != NULL);
if (pg->pg_discovery_auth_group == NULL) {
pg->pg_discovery_auth_group =
auth_group_find(conf, "default");
assert(pg->pg_discovery_auth_group != NULL);
}
TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
if (targ->t_portal_group == pg)
break;
}
if (targ == NULL) {
if (strcmp(pg->pg_name, "default") != 0)
log_warnx("portal-group \"%s\" not assigned "
"to any target", pg->pg_name);
pg->pg_unassigned = true;
} else
pg->pg_unassigned = false;
}
TAILQ_FOREACH(ag, &conf->conf_auth_groups, ag_next) {
if (ag->ag_name == NULL)
assert(ag->ag_target != NULL);
else
assert(ag->ag_target == NULL);
TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
if (targ->t_auth_group == ag)
break;
}
if (targ == NULL && ag->ag_name != NULL &&
strcmp(ag->ag_name, "default") != 0 &&
strcmp(ag->ag_name, "no-authentication") != 0 &&
strcmp(ag->ag_name, "no-access") != 0) {
log_warnx("auth-group \"%s\" not assigned "
"to any target", ag->ag_name);
}
}
return (0);
}
static int
conf_apply(struct conf *oldconf, struct conf *newconf)
{
struct target *oldtarg, *newtarg, *tmptarg;
struct lun *oldlun, *newlun, *tmplun;
struct portal_group *oldpg, *newpg;
struct portal *oldp, *newp;
pid_t otherpid;
int changed, cumulated_error = 0, error;
int one = 1;
if (oldconf->conf_debug != newconf->conf_debug) {
log_debugx("changing debug level to %d", newconf->conf_debug);
log_init(newconf->conf_debug);
}
if (oldconf->conf_pidfh != NULL) {
assert(oldconf->conf_pidfile_path != NULL);
if (newconf->conf_pidfile_path != NULL &&
strcmp(oldconf->conf_pidfile_path,
newconf->conf_pidfile_path) == 0) {
newconf->conf_pidfh = oldconf->conf_pidfh;
oldconf->conf_pidfh = NULL;
} else {
log_debugx("removing pidfile %s",
oldconf->conf_pidfile_path);
pidfile_remove(oldconf->conf_pidfh);
oldconf->conf_pidfh = NULL;
}
}
if (newconf->conf_pidfh == NULL && newconf->conf_pidfile_path != NULL) {
log_debugx("opening pidfile %s", newconf->conf_pidfile_path);
newconf->conf_pidfh =
pidfile_open(newconf->conf_pidfile_path, 0600, &otherpid);
if (newconf->conf_pidfh == NULL) {
if (errno == EEXIST)
log_errx(1, "daemon already running, pid: %jd.",
(intmax_t)otherpid);
log_err(1, "cannot open or create pidfile \"%s\"",
newconf->conf_pidfile_path);
}
}
if (oldconf->conf_kernel_port_on != newconf->conf_kernel_port_on) {
if (newconf->conf_kernel_port_on == true) {
log_debugx("enabling CTL iSCSI port");
error = kernel_port_on();
if (error != 0)
log_errx(1, "failed to enable CTL iSCSI port; exiting");
} else {
error = kernel_port_off();
if (error != 0)
log_warnx("failed to disable CTL iSCSI port");
}
}
/*
* XXX: If target or lun removal fails, we should somehow "move"
* the old lun or target into newconf, so that subsequent
* conf_apply() would try to remove them again. That would
* be somewhat hairy, though, and lun deletion failures don't
* really happen, so leave it as it is for now.
*/
TAILQ_FOREACH_SAFE(oldtarg, &oldconf->conf_targets, t_next, tmptarg) {
/*
* First, remove any targets present in the old configuration
* and missing in the new one.
*/
newtarg = target_find(newconf, oldtarg->t_name);
if (newtarg == NULL) {
TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next,
tmplun) {
log_debugx("target %s not found in new "
"configuration; removing its lun %d, "
"backed by CTL lun %d",
oldtarg->t_name, oldlun->l_lun,
oldlun->l_ctl_lun);
error = kernel_lun_remove(oldlun);
if (error != 0) {
log_warnx("failed to remove lun %d, "
"target %s, CTL lun %d",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
cumulated_error++;
}
lun_delete(oldlun);
}
target_delete(oldtarg);
continue;
}
/*
* Second, remove any LUNs present in the old target
* and missing in the new one.
*/
TAILQ_FOREACH_SAFE(oldlun, &oldtarg->t_luns, l_next, tmplun) {
newlun = lun_find(newtarg, oldlun->l_lun);
if (newlun == NULL) {
log_debugx("lun %d, target %s, CTL lun %d "
"not found in new configuration; "
"removing", oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
error = kernel_lun_remove(oldlun);
if (error != 0) {
log_warnx("failed to remove lun %d, "
"target %s, CTL lun %d",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
cumulated_error++;
}
lun_delete(oldlun);
continue;
}
/*
* Also remove the LUNs changed by more than size.
*/
changed = 0;
assert(oldlun->l_backend != NULL);
assert(newlun->l_backend != NULL);
if (strcmp(newlun->l_backend, oldlun->l_backend) != 0) {
log_debugx("backend for lun %d, target %s, "
"CTL lun %d changed; removing",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
changed = 1;
}
if (oldlun->l_blocksize != newlun->l_blocksize) {
log_debugx("blocksize for lun %d, target %s, "
"CTL lun %d changed; removing",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
changed = 1;
}
if (newlun->l_device_id != NULL &&
(oldlun->l_device_id == NULL ||
strcmp(oldlun->l_device_id, newlun->l_device_id) !=
0)) {
log_debugx("device-id for lun %d, target %s, "
"CTL lun %d changed; removing",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
changed = 1;
}
if (newlun->l_path != NULL &&
(oldlun->l_path == NULL ||
strcmp(oldlun->l_path, newlun->l_path) != 0)) {
log_debugx("path for lun %d, target %s, "
"CTL lun %d, changed; removing",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
changed = 1;
}
if (newlun->l_serial != NULL &&
(oldlun->l_serial == NULL ||
strcmp(oldlun->l_serial, newlun->l_serial) != 0)) {
log_debugx("serial for lun %d, target %s, "
"CTL lun %d changed; removing",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
changed = 1;
}
if (changed) {
error = kernel_lun_remove(oldlun);
if (error != 0) {
log_warnx("failed to remove lun %d, "
"target %s, CTL lun %d",
oldlun->l_lun, oldtarg->t_name,
oldlun->l_ctl_lun);
cumulated_error++;
}
lun_delete(oldlun);
continue;
}
lun_set_ctl_lun(newlun, oldlun->l_ctl_lun);
}
}
/*
* Now add new targets or modify existing ones.
*/
TAILQ_FOREACH(newtarg, &newconf->conf_targets, t_next) {
oldtarg = target_find(oldconf, newtarg->t_name);
TAILQ_FOREACH_SAFE(newlun, &newtarg->t_luns, l_next, tmplun) {
if (oldtarg != NULL) {
oldlun = lun_find(oldtarg, newlun->l_lun);
if (oldlun != NULL) {
if (newlun->l_size != oldlun->l_size) {
log_debugx("resizing lun %d, "
"target %s, CTL lun %d",
newlun->l_lun,
newtarg->t_name,
newlun->l_ctl_lun);
error =
kernel_lun_resize(newlun);
if (error != 0) {
log_warnx("failed to "
"resize lun %d, "
"target %s, "
"CTL lun %d",
newlun->l_lun,
newtarg->t_name,
newlun->l_lun);
cumulated_error++;
}
}
continue;
}
}
log_debugx("adding lun %d, target %s",
newlun->l_lun, newtarg->t_name);
error = kernel_lun_add(newlun);
if (error != 0) {
log_warnx("failed to add lun %d, target %s",
newlun->l_lun, newtarg->t_name);
lun_delete(newlun);
cumulated_error++;
}
}
}
/*
* Go through the new portals, opening the sockets as neccessary.
*/
TAILQ_FOREACH(newpg, &newconf->conf_portal_groups, pg_next) {
if (newpg->pg_unassigned) {
log_debugx("not listening on portal-group \"%s\", "
"not assigned to any target",
newpg->pg_name);
continue;
}
TAILQ_FOREACH(newp, &newpg->pg_portals, p_next) {
/*
* Try to find already open portal and reuse
* the listening socket. We don't care about
* what portal or portal group that was, what
* matters is the listening address.
*/
TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups,
pg_next) {
TAILQ_FOREACH(oldp, &oldpg->pg_portals,
p_next) {
if (strcmp(newp->p_listen,
oldp->p_listen) == 0 &&
oldp->p_socket > 0) {
newp->p_socket =
oldp->p_socket;
oldp->p_socket = 0;
break;
}
}
}
if (newp->p_socket > 0) {
/*
* We're done with this portal.
*/
continue;
}
#ifdef ICL_KERNEL_PROXY
if (proxy_mode) {
newpg->pg_conf->conf_portal_id++;
newp->p_id = newpg->pg_conf->conf_portal_id;
log_debugx("listening on %s, portal-group "
"\"%s\", portal id %d, using ICL proxy",
newp->p_listen, newpg->pg_name, newp->p_id);
kernel_listen(newp->p_ai, newp->p_iser,
newp->p_id);
continue;
}
#endif
assert(proxy_mode == false);
assert(newp->p_iser == false);
log_debugx("listening on %s, portal-group \"%s\"",
newp->p_listen, newpg->pg_name);
newp->p_socket = socket(newp->p_ai->ai_family,
newp->p_ai->ai_socktype,
newp->p_ai->ai_protocol);
if (newp->p_socket < 0) {
log_warn("socket(2) failed for %s",
newp->p_listen);
cumulated_error++;
continue;
}
error = setsockopt(newp->p_socket, SOL_SOCKET,
SO_REUSEADDR, &one, sizeof(one));
if (error != 0) {
log_warn("setsockopt(SO_REUSEADDR) failed "
"for %s", newp->p_listen);
close(newp->p_socket);
newp->p_socket = 0;
cumulated_error++;
continue;
}
error = bind(newp->p_socket, newp->p_ai->ai_addr,
newp->p_ai->ai_addrlen);
if (error != 0) {
log_warn("bind(2) failed for %s",
newp->p_listen);
close(newp->p_socket);
newp->p_socket = 0;
cumulated_error++;
continue;
}
error = listen(newp->p_socket, -1);
if (error != 0) {
log_warn("listen(2) failed for %s",
newp->p_listen);
close(newp->p_socket);
newp->p_socket = 0;
cumulated_error++;
continue;
}
}
}
/*
* Go through the no longer used sockets, closing them.
*/
TAILQ_FOREACH(oldpg, &oldconf->conf_portal_groups, pg_next) {
TAILQ_FOREACH(oldp, &oldpg->pg_portals, p_next) {
if (oldp->p_socket <= 0)
continue;
log_debugx("closing socket for %s, portal-group \"%s\"",
oldp->p_listen, oldpg->pg_name);
close(oldp->p_socket);
oldp->p_socket = 0;
}
}
return (cumulated_error);
}
bool
timed_out(void)
{
return (sigalrm_received);
}
static void
sigalrm_handler(int dummy __unused)
{
/*
* It would be easiest to just log an error and exit. We can't
* do this, though, because log_errx() is not signal safe, since
* it calls syslog(3). Instead, set a flag checked by pdu_send()
* and pdu_receive(), to call log_errx() there. Should they fail
* to notice, we'll exit here one second later.
*/
if (sigalrm_received) {
/*
* Oh well. Just give up and quit.
*/
_exit(2);
}
sigalrm_received = true;
}
static void
set_timeout(const struct conf *conf)
{
struct sigaction sa;
struct itimerval itv;
int error;
if (conf->conf_timeout <= 0) {
log_debugx("session timeout disabled");
return;
}
bzero(&sa, sizeof(sa));
sa.sa_handler = sigalrm_handler;
sigfillset(&sa.sa_mask);
error = sigaction(SIGALRM, &sa, NULL);
if (error != 0)
log_err(1, "sigaction");
/*
* First SIGALRM will arive after conf_timeout seconds.
* If we do nothing, another one will arrive a second later.
*/
bzero(&itv, sizeof(itv));
itv.it_interval.tv_sec = 1;
itv.it_value.tv_sec = conf->conf_timeout;
log_debugx("setting session timeout to %d seconds",
conf->conf_timeout);
error = setitimer(ITIMER_REAL, &itv, NULL);
if (error != 0)
log_err(1, "setitimer");
}
static int
wait_for_children(bool block)
{
pid_t pid;
int status;
int num = 0;
for (;;) {
/*
* If "block" is true, wait for at least one process.
*/
if (block && num == 0)
pid = wait4(-1, &status, 0, NULL);
else
pid = wait4(-1, &status, WNOHANG, NULL);
if (pid <= 0)
break;
if (WIFSIGNALED(status)) {
log_warnx("child process %d terminated with signal %d",
pid, WTERMSIG(status));
} else if (WEXITSTATUS(status) != 0) {
log_warnx("child process %d terminated with exit status %d",
pid, WEXITSTATUS(status));
} else {
log_debugx("child process %d terminated gracefully", pid);
}
num++;
}
return (num);
}
static void
handle_connection(struct portal *portal, int fd,
const struct sockaddr *client_sa, socklen_t client_salen, bool dont_fork)
{
struct connection *conn;
int error;
pid_t pid;
char host[NI_MAXHOST + 1];
struct conf *conf;
conf = portal->p_portal_group->pg_conf;
if (dont_fork) {
log_debugx("incoming connection; not forking due to -d flag");
} else {
nchildren -= wait_for_children(false);
assert(nchildren >= 0);
while (conf->conf_maxproc > 0 && nchildren >= conf->conf_maxproc) {
log_debugx("maxproc limit of %d child processes hit; "
"waiting for child process to exit", conf->conf_maxproc);
nchildren -= wait_for_children(true);
assert(nchildren >= 0);
}
log_debugx("incoming connection; forking child process #%d",
nchildren);
nchildren++;
pid = fork();
if (pid < 0)
log_err(1, "fork");
if (pid > 0) {
close(fd);
return;
}
}
pidfile_close(conf->conf_pidfh);
error = getnameinfo(client_sa, client_salen,
host, sizeof(host), NULL, 0, NI_NUMERICHOST);
if (error != 0)
log_errx(1, "getnameinfo: %s", gai_strerror(error));
log_debugx("accepted connection from %s; portal group \"%s\"",
host, portal->p_portal_group->pg_name);
log_set_peer_addr(host);
setproctitle("%s", host);
conn = connection_new(portal, fd, host);
set_timeout(conf);
kernel_capsicate();
login(conn);
if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
kernel_handoff(conn);
log_debugx("connection handed off to the kernel");
} else {
assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
discovery(conn);
}
log_debugx("nothing more to do; exiting");
exit(0);
}
static int
fd_add(int fd, fd_set *fdset, int nfds)
{
/*
* Skip sockets which we failed to bind.
*/
if (fd <= 0)
return (nfds);
FD_SET(fd, fdset);
if (fd > nfds)
nfds = fd;
return (nfds);
}
static void
main_loop(struct conf *conf, bool dont_fork)
{
struct portal_group *pg;
struct portal *portal;
struct sockaddr_storage client_sa;
socklen_t client_salen;
#ifdef ICL_KERNEL_PROXY
int connection_id;
int portal_id;
#endif
fd_set fdset;
int error, nfds, client_fd;
pidfile_write(conf->conf_pidfh);
for (;;) {
if (sighup_received || sigterm_received)
return;
#ifdef ICL_KERNEL_PROXY
if (proxy_mode) {
client_salen = sizeof(client_sa);
kernel_accept(&connection_id, &portal_id,
(struct sockaddr *)&client_sa, &client_salen);
log_debugx("incoming connection, id %d, portal id %d",
connection_id, portal_id);
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
if (portal->p_id == portal_id) {
goto found;
}
}
}
log_errx(1, "kernel returned invalid portal_id %d",
portal_id);
found:
handle_connection(portal, connection_id,
(struct sockaddr *)&client_sa, client_salen,
dont_fork);
} else {
#endif
assert(proxy_mode == false);
FD_ZERO(&fdset);
nfds = 0;
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
TAILQ_FOREACH(portal, &pg->pg_portals, p_next)
nfds = fd_add(portal->p_socket, &fdset, nfds);
}
error = select(nfds + 1, &fdset, NULL, NULL, NULL);
if (error <= 0) {
if (errno == EINTR)
return;
log_err(1, "select");
}
TAILQ_FOREACH(pg, &conf->conf_portal_groups, pg_next) {
TAILQ_FOREACH(portal, &pg->pg_portals, p_next) {
if (!FD_ISSET(portal->p_socket, &fdset))
continue;
client_salen = sizeof(client_sa);
client_fd = accept(portal->p_socket,
(struct sockaddr *)&client_sa,
&client_salen);
if (client_fd < 0)
log_err(1, "accept");
handle_connection(portal, client_fd,
(struct sockaddr *)&client_sa,
client_salen, dont_fork);
break;
}
}
#ifdef ICL_KERNEL_PROXY
}
#endif
}
}
static void
sighup_handler(int dummy __unused)
{
sighup_received = true;
}
static void
sigterm_handler(int dummy __unused)
{
sigterm_received = true;
}
static void
sigchld_handler(int dummy __unused)
{
/*
* The only purpose of this handler is to make SIGCHLD
* interrupt the ISCSIDWAIT ioctl(2), so we can call
* wait_for_children().
*/
}
static void
register_signals(void)
{
struct sigaction sa;
int error;
bzero(&sa, sizeof(sa));
sa.sa_handler = sighup_handler;
sigfillset(&sa.sa_mask);
error = sigaction(SIGHUP, &sa, NULL);
if (error != 0)
log_err(1, "sigaction");
sa.sa_handler = sigterm_handler;
error = sigaction(SIGTERM, &sa, NULL);
if (error != 0)
log_err(1, "sigaction");
sa.sa_handler = sigterm_handler;
error = sigaction(SIGINT, &sa, NULL);
if (error != 0)
log_err(1, "sigaction");
sa.sa_handler = sigchld_handler;
error = sigaction(SIGCHLD, &sa, NULL);
if (error != 0)
log_err(1, "sigaction");
}
int
main(int argc, char **argv)
{
struct conf *oldconf, *newconf, *tmpconf;
const char *config_path = DEFAULT_CONFIG_PATH;
int debug = 0, ch, error;
bool dont_daemonize = false;
while ((ch = getopt(argc, argv, "df:R")) != -1) {
switch (ch) {
case 'd':
dont_daemonize = true;
debug++;
break;
case 'f':
config_path = optarg;
break;
case 'R':
#ifndef ICL_KERNEL_PROXY
log_errx(1, "ctld(8) compiled without ICL_KERNEL_PROXY "
"does not support iSER protocol");
#endif
proxy_mode = true;
break;
case '?':
default:
usage();
}
}
argc -= optind;
if (argc != 0)
usage();
log_init(debug);
kernel_init();
oldconf = conf_new_from_kernel();
newconf = conf_new_from_file(config_path);
if (newconf == NULL)
log_errx(1, "configuration error; exiting");
if (debug > 0) {
oldconf->conf_debug = debug;
newconf->conf_debug = debug;
}
error = conf_apply(oldconf, newconf);
if (error != 0)
log_errx(1, "failed to apply configuration; exiting");
conf_delete(oldconf);
oldconf = NULL;
register_signals();
if (dont_daemonize == false) {
log_debugx("daemonizing");
if (daemon(0, 0) == -1) {
log_warn("cannot daemonize");
pidfile_remove(newconf->conf_pidfh);
exit(1);
}
}
for (;;) {
main_loop(newconf, dont_daemonize);
if (sighup_received) {
sighup_received = false;
log_debugx("received SIGHUP, reloading configuration");
tmpconf = conf_new_from_file(config_path);
if (tmpconf == NULL) {
log_warnx("configuration error, "
"continuing with old configuration");
} else {
if (debug > 0)
tmpconf->conf_debug = debug;
oldconf = newconf;
newconf = tmpconf;
error = conf_apply(oldconf, newconf);
if (error != 0)
log_warnx("failed to reload "
"configuration");
conf_delete(oldconf);
oldconf = NULL;
}
} else if (sigterm_received) {
log_debugx("exiting on signal; "
"reloading empty configuration");
log_debugx("disabling CTL iSCSI port "
"and terminating all connections");
oldconf = newconf;
newconf = conf_new();
if (debug > 0)
newconf->conf_debug = debug;
error = conf_apply(oldconf, newconf);
if (error != 0)
log_warnx("failed to apply configuration");
log_warnx("exiting on signal");
exit(0);
} else {
nchildren -= wait_for_children(false);
assert(nchildren >= 0);
}
}
/* NOTREACHED */
}
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