2013-09-14 15:29:06 +00:00
|
|
|
/*-
|
|
|
|
* 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/ioctl.h>
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/linker.h>
|
|
|
|
#include <sys/socket.h>
|
2014-03-16 11:04:44 +00:00
|
|
|
#include <sys/capsicum.h>
|
2013-09-14 15:29:06 +00:00
|
|
|
#include <sys/wait.h>
|
|
|
|
#include <assert.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#include <fcntl.h>
|
|
|
|
#include <netdb.h>
|
|
|
|
#include <signal.h>
|
|
|
|
#include <stdbool.h>
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
#include <libutil.h>
|
|
|
|
|
|
|
|
#include "iscsid.h"
|
|
|
|
|
|
|
|
static volatile bool sigalrm_received = false;
|
|
|
|
|
|
|
|
static int nchildren = 0;
|
|
|
|
|
|
|
|
static void
|
|
|
|
usage(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
fprintf(stderr, "usage: iscsid [-P pidfile][-d][-m maxproc][-t timeout]\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
|
|
checked_strdup(const char *s)
|
|
|
|
{
|
|
|
|
char *c;
|
|
|
|
|
|
|
|
c = strdup(s);
|
|
|
|
if (c == NULL)
|
|
|
|
log_err(1, "strdup");
|
|
|
|
return (c);
|
|
|
|
}
|
|
|
|
|
2013-09-17 14:23:15 +00:00
|
|
|
static void
|
|
|
|
resolve_addr(const struct connection *conn, const char *address,
|
|
|
|
struct addrinfo **ai, bool initiator_side)
|
2013-09-14 15:29:06 +00:00
|
|
|
{
|
|
|
|
struct addrinfo hints;
|
|
|
|
char *arg, *addr, *ch;
|
|
|
|
const char *port;
|
|
|
|
int error, colons = 0;
|
|
|
|
|
|
|
|
arg = checked_strdup(address);
|
|
|
|
|
|
|
|
if (arg[0] == '\0') {
|
2013-09-17 14:23:15 +00:00
|
|
|
fail(conn, "empty address");
|
|
|
|
log_errx(1, "empty address");
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
|
|
|
if (arg[0] == '[') {
|
|
|
|
/*
|
|
|
|
* IPv6 address in square brackets, perhaps with port.
|
|
|
|
*/
|
|
|
|
arg++;
|
|
|
|
addr = strsep(&arg, "]");
|
|
|
|
if (arg == NULL) {
|
2013-09-17 14:23:15 +00:00
|
|
|
fail(conn, "malformed address");
|
|
|
|
log_errx(1, "malformed address %s", address);
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
|
|
|
if (arg[0] == '\0') {
|
2013-09-17 14:23:15 +00:00
|
|
|
port = NULL;
|
2013-09-14 15:29:06 +00:00
|
|
|
} else if (arg[0] == ':') {
|
|
|
|
port = arg + 1;
|
|
|
|
} else {
|
2013-09-17 14:23:15 +00:00
|
|
|
fail(conn, "malformed address");
|
|
|
|
log_errx(1, "malformed address %s", address);
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
|
|
|
} 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;
|
2013-09-17 14:23:15 +00:00
|
|
|
port = NULL;
|
2013-09-14 15:29:06 +00:00
|
|
|
} else {
|
|
|
|
addr = strsep(&arg, ":");
|
|
|
|
if (arg == NULL)
|
2013-09-17 14:23:15 +00:00
|
|
|
port = NULL;
|
2013-09-14 15:29:06 +00:00
|
|
|
else
|
|
|
|
port = arg;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-09-17 14:23:15 +00:00
|
|
|
if (port == NULL && !initiator_side)
|
|
|
|
port = "3260";
|
|
|
|
|
2013-09-14 15:29:06 +00:00
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
|
|
hints.ai_family = PF_UNSPEC;
|
|
|
|
hints.ai_socktype = SOCK_STREAM;
|
2013-09-17 14:23:15 +00:00
|
|
|
hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
|
|
|
|
if (initiator_side)
|
|
|
|
hints.ai_flags |= AI_PASSIVE;
|
2013-09-14 15:29:06 +00:00
|
|
|
|
|
|
|
error = getaddrinfo(addr, port, &hints, ai);
|
|
|
|
if (error != 0) {
|
2013-09-17 14:23:15 +00:00
|
|
|
fail(conn, gai_strerror(error));
|
|
|
|
log_errx(1, "getaddrinfo for %s failed: %s",
|
2013-09-14 15:29:06 +00:00
|
|
|
address, gai_strerror(error));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct connection *
|
|
|
|
connection_new(unsigned int session_id, const struct iscsi_session_conf *conf,
|
|
|
|
int iscsi_fd)
|
|
|
|
{
|
|
|
|
struct connection *conn;
|
|
|
|
struct addrinfo *from_ai, *to_ai;
|
|
|
|
const char *from_addr, *to_addr;
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
2013-09-18 21:15:21 +00:00
|
|
|
struct iscsi_daemon_connect idc;
|
2013-09-14 15:29:06 +00:00
|
|
|
#endif
|
|
|
|
int error;
|
|
|
|
|
|
|
|
conn = calloc(1, sizeof(*conn));
|
|
|
|
if (conn == NULL)
|
|
|
|
log_err(1, "calloc");
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Default values, from RFC 3720, section 12.
|
|
|
|
*/
|
|
|
|
conn->conn_header_digest = CONN_DIGEST_NONE;
|
|
|
|
conn->conn_data_digest = CONN_DIGEST_NONE;
|
|
|
|
conn->conn_initial_r2t = true;
|
|
|
|
conn->conn_immediate_data = true;
|
|
|
|
conn->conn_max_data_segment_length = 8192;
|
|
|
|
conn->conn_max_burst_length = 262144;
|
|
|
|
conn->conn_first_burst_length = 65536;
|
|
|
|
|
|
|
|
conn->conn_session_id = session_id;
|
2013-09-17 14:23:15 +00:00
|
|
|
conn->conn_iscsi_fd = iscsi_fd;
|
|
|
|
|
2013-09-14 15:29:06 +00:00
|
|
|
/*
|
|
|
|
* XXX: Should we sanitize this somehow?
|
|
|
|
*/
|
|
|
|
memcpy(&conn->conn_conf, conf, sizeof(conn->conn_conf));
|
|
|
|
|
|
|
|
from_addr = conn->conn_conf.isc_initiator_addr;
|
|
|
|
to_addr = conn->conn_conf.isc_target_addr;
|
|
|
|
|
2013-09-17 14:23:15 +00:00
|
|
|
if (from_addr[0] != '\0')
|
|
|
|
resolve_addr(conn, from_addr, &from_ai, true);
|
|
|
|
else
|
2013-09-14 15:29:06 +00:00
|
|
|
from_ai = NULL;
|
|
|
|
|
2013-09-17 14:23:15 +00:00
|
|
|
resolve_addr(conn, to_addr, &to_ai, false);
|
2013-09-14 15:29:06 +00:00
|
|
|
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
|
|
|
2013-09-18 21:15:21 +00:00
|
|
|
memset(&idc, 0, sizeof(idc));
|
|
|
|
idc.idc_session_id = conn->conn_session_id;
|
2013-09-14 15:29:06 +00:00
|
|
|
if (conn->conn_conf.isc_iser)
|
2013-09-18 21:15:21 +00:00
|
|
|
idc.idc_iser = 1;
|
|
|
|
idc.idc_domain = to_ai->ai_family;
|
|
|
|
idc.idc_socktype = to_ai->ai_socktype;
|
|
|
|
idc.idc_protocol = to_ai->ai_protocol;
|
2013-09-14 15:29:06 +00:00
|
|
|
if (from_ai != NULL) {
|
2013-09-18 21:15:21 +00:00
|
|
|
idc.idc_from_addr = from_ai->ai_addr;
|
|
|
|
idc.idc_from_addrlen = from_ai->ai_addrlen;
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
2013-09-18 21:15:21 +00:00
|
|
|
idc.idc_to_addr = to_ai->ai_addr;
|
|
|
|
idc.idc_to_addrlen = to_ai->ai_addrlen;
|
2013-09-14 15:29:06 +00:00
|
|
|
|
|
|
|
log_debugx("connecting to %s using ICL kernel proxy", to_addr);
|
2013-09-18 21:15:21 +00:00
|
|
|
error = ioctl(iscsi_fd, ISCSIDCONNECT, &idc);
|
2013-09-14 15:29:06 +00:00
|
|
|
if (error != 0) {
|
|
|
|
fail(conn, strerror(errno));
|
|
|
|
log_err(1, "failed to connect to %s using ICL kernel proxy",
|
|
|
|
to_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
#else /* !ICL_KERNEL_PROXY */
|
|
|
|
|
2013-09-17 14:23:15 +00:00
|
|
|
if (conn->conn_conf.isc_iser) {
|
|
|
|
fail(conn, "iSER not supported");
|
2013-09-14 15:29:06 +00:00
|
|
|
log_errx(1, "iscsid(8) compiled without ICL_KERNEL_PROXY "
|
|
|
|
"does not support iSER");
|
2013-09-17 14:23:15 +00:00
|
|
|
}
|
2013-09-14 15:29:06 +00:00
|
|
|
|
|
|
|
conn->conn_socket = socket(to_ai->ai_family, to_ai->ai_socktype,
|
|
|
|
to_ai->ai_protocol);
|
2013-09-17 14:23:15 +00:00
|
|
|
if (conn->conn_socket < 0) {
|
|
|
|
fail(conn, strerror(errno));
|
2013-09-14 15:29:06 +00:00
|
|
|
log_err(1, "failed to create socket for %s", from_addr);
|
2013-09-17 14:23:15 +00:00
|
|
|
}
|
2013-09-14 15:29:06 +00:00
|
|
|
if (from_ai != NULL) {
|
|
|
|
error = bind(conn->conn_socket, from_ai->ai_addr,
|
|
|
|
from_ai->ai_addrlen);
|
2013-09-17 14:23:15 +00:00
|
|
|
if (error != 0) {
|
|
|
|
fail(conn, strerror(errno));
|
2013-09-14 15:29:06 +00:00
|
|
|
log_err(1, "failed to bind to %s", from_addr);
|
2013-09-17 14:23:15 +00:00
|
|
|
}
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
|
|
|
log_debugx("connecting to %s", to_addr);
|
|
|
|
error = connect(conn->conn_socket, to_ai->ai_addr, to_ai->ai_addrlen);
|
|
|
|
if (error != 0) {
|
|
|
|
fail(conn, strerror(errno));
|
|
|
|
log_err(1, "failed to connect to %s", to_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* !ICL_KERNEL_PROXY */
|
|
|
|
|
|
|
|
return (conn);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
handoff(struct connection *conn)
|
|
|
|
{
|
2013-09-18 21:15:21 +00:00
|
|
|
struct iscsi_daemon_handoff idh;
|
2013-09-14 15:29:06 +00:00
|
|
|
int error;
|
|
|
|
|
|
|
|
log_debugx("handing off connection to the kernel");
|
|
|
|
|
2013-09-18 21:15:21 +00:00
|
|
|
memset(&idh, 0, sizeof(idh));
|
|
|
|
idh.idh_session_id = conn->conn_session_id;
|
2013-09-14 15:29:06 +00:00
|
|
|
#ifndef ICL_KERNEL_PROXY
|
2013-09-18 21:15:21 +00:00
|
|
|
idh.idh_socket = conn->conn_socket;
|
2013-09-14 15:29:06 +00:00
|
|
|
#endif
|
2013-09-18 21:15:21 +00:00
|
|
|
strlcpy(idh.idh_target_alias, conn->conn_target_alias,
|
|
|
|
sizeof(idh.idh_target_alias));
|
|
|
|
memcpy(idh.idh_isid, conn->conn_isid, sizeof(idh.idh_isid));
|
|
|
|
idh.idh_statsn = conn->conn_statsn;
|
|
|
|
idh.idh_header_digest = conn->conn_header_digest;
|
|
|
|
idh.idh_data_digest = conn->conn_data_digest;
|
|
|
|
idh.idh_initial_r2t = conn->conn_initial_r2t;
|
|
|
|
idh.idh_immediate_data = conn->conn_immediate_data;
|
|
|
|
idh.idh_max_data_segment_length = conn->conn_max_data_segment_length;
|
|
|
|
idh.idh_max_burst_length = conn->conn_max_burst_length;
|
|
|
|
idh.idh_first_burst_length = conn->conn_first_burst_length;
|
|
|
|
|
|
|
|
error = ioctl(conn->conn_iscsi_fd, ISCSIDHANDOFF, &idh);
|
2013-09-14 15:29:06 +00:00
|
|
|
if (error != 0)
|
|
|
|
log_err(1, "ISCSIDHANDOFF");
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
fail(const struct connection *conn, const char *reason)
|
|
|
|
{
|
2013-09-18 21:15:21 +00:00
|
|
|
struct iscsi_daemon_fail idf;
|
2013-09-14 15:29:06 +00:00
|
|
|
int error;
|
|
|
|
|
2013-09-18 21:15:21 +00:00
|
|
|
memset(&idf, 0, sizeof(idf));
|
|
|
|
idf.idf_session_id = conn->conn_session_id;
|
|
|
|
strlcpy(idf.idf_reason, reason, sizeof(idf.idf_reason));
|
2013-09-14 15:29:06 +00:00
|
|
|
|
2013-09-18 21:15:21 +00:00
|
|
|
error = ioctl(conn->conn_iscsi_fd, ISCSIDFAIL, &idf);
|
2013-09-14 15:29:06 +00:00
|
|
|
if (error != 0)
|
|
|
|
log_err(1, "ISCSIDFAIL");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX: I CANT INTO LATIN
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
capsicate(struct connection *conn)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
cap_rights_t rights;
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
|
|
const unsigned long cmds[] = { ISCSIDCONNECT, ISCSIDSEND, ISCSIDRECEIVE,
|
|
|
|
ISCSIDHANDOFF, ISCSIDFAIL, ISCSISADD, ISCSISREMOVE };
|
|
|
|
#else
|
|
|
|
const unsigned long cmds[] = { ISCSIDHANDOFF, ISCSIDFAIL, ISCSISADD,
|
|
|
|
ISCSISREMOVE };
|
|
|
|
#endif
|
|
|
|
|
|
|
|
cap_rights_init(&rights, CAP_IOCTL);
|
|
|
|
error = cap_rights_limit(conn->conn_iscsi_fd, &rights);
|
|
|
|
if (error != 0 && errno != ENOSYS)
|
|
|
|
log_err(1, "cap_rights_limit");
|
|
|
|
|
|
|
|
error = cap_ioctls_limit(conn->conn_iscsi_fd, cmds,
|
|
|
|
sizeof(cmds) / sizeof(cmds[0]));
|
|
|
|
if (error != 0 && errno != ENOSYS)
|
|
|
|
log_err(1, "cap_ioctls_limit");
|
|
|
|
|
|
|
|
error = cap_enter();
|
|
|
|
if (error != 0 && errno != ENOSYS)
|
|
|
|
log_err(1, "cap_enter");
|
|
|
|
|
|
|
|
if (cap_sandboxed())
|
|
|
|
log_debugx("Capsicum capability mode enabled");
|
|
|
|
else
|
|
|
|
log_warnx("Capsicum capability mode not supported");
|
|
|
|
}
|
|
|
|
|
|
|
|
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(int timeout)
|
|
|
|
{
|
|
|
|
struct sigaction sa;
|
|
|
|
struct itimerval itv;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (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 = timeout;
|
|
|
|
|
|
|
|
log_debugx("setting session timeout to %d seconds",
|
|
|
|
timeout);
|
|
|
|
error = setitimer(ITIMER_REAL, &itv, NULL);
|
|
|
|
if (error != 0)
|
|
|
|
log_err(1, "setitimer");
|
|
|
|
}
|
|
|
|
|
2014-02-11 10:47:28 +00:00
|
|
|
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_sigchld(void)
|
|
|
|
{
|
|
|
|
struct sigaction sa;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
bzero(&sa, sizeof(sa));
|
|
|
|
sa.sa_handler = sigchld_handler;
|
|
|
|
sigfillset(&sa.sa_mask);
|
|
|
|
error = sigaction(SIGCHLD, &sa, NULL);
|
|
|
|
if (error != 0)
|
|
|
|
log_err(1, "sigaction");
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2013-09-14 15:29:06 +00:00
|
|
|
static void
|
2013-09-18 21:15:21 +00:00
|
|
|
handle_request(int iscsi_fd, const struct iscsi_daemon_request *request, int timeout)
|
2013-09-14 15:29:06 +00:00
|
|
|
{
|
|
|
|
struct connection *conn;
|
|
|
|
|
|
|
|
log_set_peer_addr(request->idr_conf.isc_target_addr);
|
|
|
|
if (request->idr_conf.isc_target[0] != '\0') {
|
|
|
|
log_set_peer_name(request->idr_conf.isc_target);
|
|
|
|
setproctitle("%s (%s)", request->idr_conf.isc_target_addr, request->idr_conf.isc_target);
|
|
|
|
} else {
|
|
|
|
setproctitle("%s", request->idr_conf.isc_target_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
conn = connection_new(request->idr_session_id, &request->idr_conf, iscsi_fd);
|
|
|
|
set_timeout(timeout);
|
|
|
|
capsicate(conn);
|
|
|
|
login(conn);
|
|
|
|
if (conn->conn_conf.isc_discovery != 0)
|
|
|
|
discovery(conn);
|
|
|
|
else
|
|
|
|
handoff(conn);
|
|
|
|
|
|
|
|
log_debugx("nothing more to do; exiting");
|
|
|
|
exit (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
main(int argc, char **argv)
|
|
|
|
{
|
|
|
|
int ch, debug = 0, error, iscsi_fd, maxproc = 30, retval, saved_errno,
|
|
|
|
timeout = 60;
|
|
|
|
bool dont_daemonize = false;
|
|
|
|
struct pidfh *pidfh;
|
|
|
|
pid_t pid, otherpid;
|
|
|
|
const char *pidfile_path = DEFAULT_PIDFILE;
|
2013-09-18 21:15:21 +00:00
|
|
|
struct iscsi_daemon_request request;
|
2013-09-14 15:29:06 +00:00
|
|
|
|
|
|
|
while ((ch = getopt(argc, argv, "P:dl:m:t:")) != -1) {
|
|
|
|
switch (ch) {
|
|
|
|
case 'P':
|
|
|
|
pidfile_path = optarg;
|
|
|
|
break;
|
|
|
|
case 'd':
|
|
|
|
dont_daemonize = true;
|
|
|
|
debug++;
|
|
|
|
break;
|
|
|
|
case 'l':
|
|
|
|
debug = atoi(optarg);
|
|
|
|
break;
|
|
|
|
case 'm':
|
|
|
|
maxproc = atoi(optarg);
|
|
|
|
break;
|
|
|
|
case 't':
|
|
|
|
timeout = atoi(optarg);
|
|
|
|
break;
|
|
|
|
case '?':
|
|
|
|
default:
|
|
|
|
usage();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
argc -= optind;
|
|
|
|
if (argc != 0)
|
|
|
|
usage();
|
|
|
|
|
|
|
|
log_init(debug);
|
|
|
|
|
|
|
|
pidfh = pidfile_open(pidfile_path, 0600, &otherpid);
|
|
|
|
if (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\"",
|
|
|
|
pidfile_path);
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_fd = open(ISCSI_PATH, O_RDWR);
|
2013-09-18 08:37:14 +00:00
|
|
|
if (iscsi_fd < 0 && errno == ENOENT) {
|
2013-09-14 15:29:06 +00:00
|
|
|
saved_errno = errno;
|
|
|
|
retval = kldload("iscsi");
|
|
|
|
if (retval != -1)
|
|
|
|
iscsi_fd = open(ISCSI_PATH, O_RDWR);
|
|
|
|
else
|
|
|
|
errno = saved_errno;
|
|
|
|
}
|
|
|
|
if (iscsi_fd < 0)
|
|
|
|
log_err(1, "failed to open %s", ISCSI_PATH);
|
|
|
|
|
|
|
|
if (dont_daemonize == false) {
|
|
|
|
if (daemon(0, 0) == -1) {
|
|
|
|
log_warn("cannot daemonize");
|
|
|
|
pidfile_remove(pidfh);
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pidfile_write(pidfh);
|
|
|
|
|
2014-02-11 10:47:28 +00:00
|
|
|
register_sigchld();
|
|
|
|
|
2013-09-14 15:29:06 +00:00
|
|
|
for (;;) {
|
|
|
|
log_debugx("waiting for request from the kernel");
|
|
|
|
|
2013-09-18 21:15:21 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
error = ioctl(iscsi_fd, ISCSIDWAIT, &request);
|
2013-09-14 15:29:06 +00:00
|
|
|
if (error != 0) {
|
|
|
|
if (errno == EINTR) {
|
|
|
|
nchildren -= wait_for_children(false);
|
|
|
|
assert(nchildren >= 0);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_err(1, "ISCSIDWAIT");
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dont_daemonize) {
|
|
|
|
log_debugx("not forking due to -d flag; "
|
|
|
|
"will exit after servicing a single request");
|
|
|
|
} else {
|
|
|
|
nchildren -= wait_for_children(false);
|
|
|
|
assert(nchildren >= 0);
|
|
|
|
|
|
|
|
while (maxproc > 0 && nchildren >= maxproc) {
|
|
|
|
log_debugx("maxproc limit of %d child processes hit; "
|
|
|
|
"waiting for child process to exit", 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)
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
pidfile_close(pidfh);
|
2013-09-18 21:15:21 +00:00
|
|
|
handle_request(iscsi_fd, &request, timeout);
|
2013-09-14 15:29:06 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|