Merged code for xlvhd thin-provisioning

GitHub: closes #168

Author: germanop

Makefile.am

@@ -6,6 +6,7 @@
 SUBDIRS  = lvm
 SUBDIRS += $(MAYBE_part)
 SUBDIRS += vhd
+SUBDIRS += thin
 SUBDIRS += control
 SUBDIRS += drivers
 SUBDIRS += include

configure.ac

@@ -80,5 +80,6 @@ control/Makefile
 drivers/Makefile
 include/Makefile
 tapback/Makefile
+thin/Makefile
 ])
 AC_OUTPUT

control/tap-ctl-create.c

@@ -30,7 +30,7 @@
 
 int
 tap_ctl_create(const char *params, char **devname, int flags, int parent_minor,
-		char *secondary, int timeout)
+		char *secondary, int timeout, int alloc_quantum)
 {
 	int err, id, minor;
 
@@ -49,7 +49,7 @@ tap_ctl_create(const char *params, char **devname, int flags, int parent_minor,
 		goto destroy;
 
 	err = tap_ctl_open(id, minor, params, flags, parent_minor, secondary,
-			timeout);
+			timeout, alloc_quantum);
 	if (err)
 		goto detach;
 

control/tap-ctl-open.c

@@ -30,7 +30,8 @@
 
 int
 tap_ctl_open(const int id, const int minor, const char *params, int flags,
-		const int prt_minor, const char *secondary, int timeout)
+		const int prt_minor, const char *secondary, int timeout,
+		int alloc_quantum)
 {
 	int err;
 	tapdisk_message_t message;
@@ -41,6 +42,7 @@ tap_ctl_open(const int id, const int minor, const char *params, int flags,
 	message.u.params.devnum = minor;
 	message.u.params.prt_devnum = prt_minor;
 	message.u.params.req_timeout = timeout;
+	message.u.params.alloc_quantum = alloc_quantum;
 	message.u.params.flags = flags;
 
 	err = snprintf(message.u.params.path,

control/tap-ctl.c

@@ -252,13 +252,16 @@ tap_cli_create_usage(FILE *stream)
 		"[-r turn on read caching into leaf node] [-2 <path> "
 		"use secondary image (in mirror mode if no -s)] [-s "
 		"fail over to the secondary image on ENOSPC] "
-		"[-t request timeout in seconds] [-D no O_DIRECT]\n");
+		"[-t request timeout in seconds] [-D no O_DIRECT] "
+		"[-T enable thin provisioning] "
+		"[-q allocation quantum in MBytes]\n");
+
 }
 
 static int
 tap_cli_create(int argc, char **argv)
 {
-	int c, err, flags, prt_minor, timeout;
+	int c, err, flags, prt_minor, timeout, alloc_quantum;
 	char *args, *devname, *secondary;
 
 	args      = NULL;
@@ -267,9 +270,10 @@ tap_cli_create(int argc, char **argv)
 	prt_minor = -1;
 	flags     = 0;
 	timeout   = 0;
+	alloc_quantum = 0;
 
 	optind = 0;
-	while ((c = getopt(argc, argv, "a:RDd:e:r2:st:h")) != -1) {
+	while ((c = getopt(argc, argv, "a:RDd:e:r2:st:Tq:h")) != -1) {
 		switch (c) {
 		case 'a':
 			args = optarg;
@@ -300,6 +304,12 @@ tap_cli_create(int argc, char **argv)
 		case 't':
 			timeout = atoi(optarg);
 			break;
+		case 'T':
+			flags |= TAPDISK_MESSAGE_FLAG_THIN;
+			break;
+		case 'q':
+			alloc_quantum = atoi(optarg);
+			break;
 		case '?':
 			goto usage;
 		case 'h':
@@ -312,7 +322,7 @@ tap_cli_create(int argc, char **argv)
 		goto usage;
 
 	err = tap_ctl_create(args, &devname, flags, prt_minor, secondary,
-			timeout);
+			timeout, alloc_quantum);
 	if (!err)
 		printf("%s\n", devname);
 
@@ -717,14 +727,16 @@ tap_cli_open_usage(FILE *stream)
 		"[-r turn on read caching into leaf node] [-2 <path> "
 		"use secondary image (in mirror mode if no -s)] [-s "
 		"fail over to the secondary image on ENOSPC] "
-		"[-t request timeout in seconds] [-D no O_DIRECT]\n");
+		"[-t request timeout in seconds] [-D no O_DIRECT] "
+		"[-T enable thin provisioning] "
+		"[-q allocation quantum in MBytes]\n");
 }
 
 static int
 tap_cli_open(int argc, char **argv)
 {
 	const char *args, *secondary;
-	int c, pid, minor, flags, prt_minor, timeout;
+	int c, pid, minor, flags, prt_minor, timeout, alloc_quantum;
 
 	flags      = 0;
 	pid        = -1;
@@ -733,9 +745,11 @@ tap_cli_open(int argc, char **argv)
 	timeout    = 0;
 	args      = NULL;
 	secondary  = NULL;
+	alloc_quantum = 0;
+
 
 	optind = 0;
-	while ((c = getopt(argc, argv, "a:RDm:p:e:r2:st:h")) != -1) {
+	while ((c = getopt(argc, argv, "a:RDm:p:e:r2:st:Tq:h")) != -1) {
 		switch (c) {
 		case 'p':
 			pid = atoi(optarg);
@@ -769,6 +783,12 @@ tap_cli_open(int argc, char **argv)
 		case 't':
 			timeout = atoi(optarg);
 			break;
+		case 'T':
+			flags |= TAPDISK_MESSAGE_FLAG_THIN;
+			break;
+		case 'q':
+			alloc_quantum = atoi(optarg);
+			break;
 		case '?':
 			goto usage;
 		case 'h':
@@ -781,7 +801,7 @@ tap_cli_open(int argc, char **argv)
 		goto usage;
 
 	return tap_ctl_open(pid, minor, args, flags, prt_minor, secondary,
-			timeout);
+			timeout, alloc_quantum);
 
 usage:
 	tap_cli_open_usage(stderr);

drivers/Makefile.am

@@ -100,6 +100,7 @@ libtapdisk_la_SOURCES += td-stats.c
 libtapdisk_la_SOURCES += td-stats.h
 
 libtapdisk_la_LIBADD  = ../vhd/lib/libvhd.la
+libtapdisk_la_LIBADD += ../thin/libtapdiskthin.la
 libtapdisk_la_LIBADD += -laio
 libtapdisk_la_LIBADD += -lxenctrl