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Code Issues Releases Activity

Allocate a target mode instance to handle our target mode session, clean

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it up on exit.  The address for attaching the emulator (path, target id,
lun) is now specified on the command line.  Some attempt at cathing
signals and cleaning up target mode instances is now made.
This commit is contained in:
Justin T. Gibbs 1999-03-05 23:12:02 +00:00
parent b2f2e3bbdb
commit b3fae35ce8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44498
1 changed files with 79 additions and 16 deletions
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95
share/examples/scsi_target/scsi_target.c
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@ -26,13 +26,15 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: scsi_target.c,v 1.1 1998/09/15 06:46:32 gibbs Exp $
* $Id: scsi_target.c,v 1.2 1998/12/10 04:00:03 gibbs Exp $
*/
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
@ -43,18 +45,26 @@
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_targetio.h>
char *appname;
int ifd;
char *ifilename;
int ofd;
char *ofilename;
size_t bufsize = 64 * 1024;
void *buf;
char *targdevname;
int targfd;
char *appname;
int ifd;
char *ifilename;
int ofd;
char *ofilename;
size_t bufsize = 64 * 1024;
void *buf;
char targdevname[80];
int targctlfd;
int targfd;
int quit;
struct ioc_alloc_unit alloc_unit = {
CAM_BUS_WILDCARD,
CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD
};
static void pump_events();
static void handle_exception();
static void quit_handler();
static void usage();
int
@ -63,7 +73,7 @@ main(int argc, char *argv[])
int ch;
appname = *argv;
while ((ch = getopt(argc, argv, "i:o:")) != -1) {
while ((ch = getopt(argc, argv, "i:o:p:t:l:")) != -1) {
switch(ch) {
case 'i':
if ((ifd = open(optarg, O_RDONLY)) == -1) {
@ -80,6 +90,15 @@ main(int argc, char *argv[])
}
ofilename = optarg;
break;
case 'p':
alloc_unit.path_id = atoi(optarg);
break;
case 't':
alloc_unit.target_id = atoi(optarg);
break;
case 'l':
alloc_unit.lun_id = atoi(optarg);
break;
case '?':
default:
usage();
@ -89,15 +108,38 @@ main(int argc, char *argv[])
argc -= optind;
argv += optind;
if (argc != 1) {
fprintf(stderr, "%s: No target device specifiled\n", appname);
if (alloc_unit.path_id == CAM_BUS_WILDCARD
|| alloc_unit.target_id == CAM_TARGET_WILDCARD
|| alloc_unit.lun_id == CAM_LUN_WILDCARD) {
fprintf(stderr, "%s: Incomplete device path specifiled\n",
appname);
usage();
/* NOTREACHED */
}
targdevname = *argv;
if (argc != 0) {
fprintf(stderr, "%s: Too many arguments\n", appname);
usage();
/* NOTREACHED */
}
/* Allocate a new instance */
if ((targctlfd = open("/dev/targ.ctl", O_RDWR)) == -1) {
perror("/dev/targ.ctl");
exit(EX_UNAVAILABLE);
}
if (ioctl(targctlfd, TARGCTLIOALLOCUNIT, &alloc_unit) == -1) {
perror("TARGCTLIOALLOCUNIT");
exit(EX_SOFTWARE);
}
snprintf(targdevname, sizeof(targdevname), "/dev/targ%d",
alloc_unit.unit);
if ((targfd = open(targdevname, O_RDWR)) == -1) {
perror(targdevname);
ioctl(targctlfd, TARGCTLIOFREEUNIT, &alloc_unit);
exit(EX_NOINPUT);
}
@ -108,8 +150,20 @@ main(int argc, char *argv[])
exit(EX_OSERR);
}
signal(SIGHUP, quit_handler);
signal(SIGINT, quit_handler);
signal(SIGTERM, quit_handler);
pump_events();
close(targfd);
if (ioctl(targctlfd, TARGCTLIOFREEUNIT, &alloc_unit) == -1) {
perror("TARGCTLIOFREEUNIT");
exit(EX_SOFTWARE);
}
close(targctlfd);
return (0);
}
@ -121,12 +175,14 @@ pump_events()
targpoll.fd = targfd;
targpoll.events = POLLRDNORM|POLLWRNORM;
while (1) {
while (quit == 0) {
int retval;
retval = poll(&targpoll, 1, INFTIM);
if (retval == -1) {
if (errno == EINTR)
continue;
perror("Poll Failed");
exit(EX_SOFTWARE);
}
@ -259,12 +315,19 @@ handle_exception()
}
}
static void
quit_handler(int signum)
{
quit = 1;
}
static void
usage()
{
(void)fprintf(stderr,
"usage: %-16s [-o output_file] [-i input_file] /dev/targ?\n", appname);
"usage: %-16s [-o output_file] [-i input_file] -p path -t target -l lun\n",
appname);
exit(EX_USAGE);
}