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

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.

1 files changed, 79 insertions, 16 deletions

diff --git a/share/examples/scsi_target/scsi_target.c b/share/examples/scsi_target/scsi_target.c
index c2a0f02..798c30b 100644
--- a/share/examples/scsi_target/scsi_target.c
+++ b/share/examples/scsi_target/scsi_target.c
@@ -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);
 		}
@@ -260,11 +316,18 @@ 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);
 }