stats: Protobuf file introduction introduction

We'll have one more "image" file generated by dump and (surprisingly)
restore commands -- the stats one. It will contain in a single pb
object all the statistics collected by dump/restore.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile.crtools

@@ -46,6 +46,7 @@ obj-y	+= page-pipe.o
 obj-y	+= page-xfer.o
 obj-y	+= page-read.o
 obj-y	+= kerndat.o
+obj-y	+= stats.o
 
 ifneq ($(MAKECMDGOALS),clean)
 incdeps := y

image.c

@@ -13,6 +13,7 @@
 #include "mount.h"
 #include "net.h"
 #include "pstree.h"
+#include "stats.h"
 #include "protobuf.h"
 #include "protobuf/inventory.pb-c.h"
 #include "protobuf/pagemap.pb-c.h"
@@ -167,6 +168,12 @@ struct cr_fd_desc_tmpl fdset_template[CR_FD_MAX] = {
 	FD_ENTRY(SHM_PAGES_OLD, "pages-shmem-%ld", NULL),
 	FD_ENTRY(SIGNAL,	"signal-s-%d",	 show_siginfo), /* shared signals */
 	FD_ENTRY(PSIGNAL,	"signal-p-%d",	 show_siginfo), /* private signals */
+
+	[CR_FD_STATS] = {
+		.fmt = "stats-%s",
+		.magic = STATS_MAGIC,
+		.show = show_stats,
+	},
 };
 
 static struct cr_fdset *alloc_cr_fdset(int nr)

include/crtools.h

@@ -16,6 +16,7 @@
 
 enum {
 	CR_FD_INVENTORY,
+	CR_FD_STATS,
 	/*
 	 * Task entries
 	 */

include/magic.h

@@ -21,6 +21,7 @@
 
 #define INVENTORY_MAGIC		0x58313116 /* Veliky Novgorod */
 #define PSTREE_MAGIC		0x50273030 /* Kyiv */
+#define STATS_MAGIC		0x57093306 /* Ostashkov */
 #define FDINFO_MAGIC		0x56213732 /* Dmitrov */
 #define PAGEMAP_MAGIC		0x56084025 /* Vladimir */
 #define SHMEM_PAGEMAP_MAGIC	PAGEMAP_MAGIC

include/protobuf.h

@@ -7,6 +7,7 @@
 
 enum {
 	PB_INVENTORY,
+	PB_STATS,
 	PB_FDINFO,
 	PB_CORE,
 	PB_MM,

include/stats.h

+#ifndef __CR_STATS_H__
+#define __CR_STATS_H__
+void show_stats(int fd);
+#endif

protobuf.c

@@ -18,6 +18,7 @@
 
 #include "protobuf.h"
 #include "protobuf/inventory.pb-c.h"
+#include "protobuf/stats.pb-c.h"
 #include "protobuf/regfile.pb-c.h"
 #include "protobuf/eventfd.pb-c.h"
 #include "protobuf/eventpoll.pb-c.h"
@@ -93,6 +94,7 @@ static struct cr_pb_message_desc cr_pb_descs[PB_MAX];
 void cr_pb_init(void)
 {
 	CR_PB_DESC(INVENTORY,		Inventory,	inventory);
+	CR_PB_DESC(STATS,		Stats,		stats);
 	CR_PB_DESC(FDINFO,		Fdinfo,		fdinfo);
 	CR_PB_DESC(REG_FILES,		RegFile,	reg_file);
 	CR_PB_DESC(EVENTFD,		EventfdFile,	eventfd_file);

protobuf/Makefile

@@ -9,6 +9,7 @@
 
 CFLAGS		+= -I$(obj)/
 
+proto-obj-y	+= stats.o
 proto-obj-y	+= core.o
 proto-obj-y	+= core-x86.o
 proto-obj-y	+= core-arm.o

protobuf/stats.proto

+// This one contains statistics about dump/restore process
+message dump_stats_entry {
+}
+
+message stats_entry {
+	optional dump_stats_entry dump = 1;
+}

stats.c

+#include <unistd.h>
+#include "protobuf.h"
+#include "stats.h"
+
+void show_stats(int fd)
+{
+	pb_show_vertical(fd, PB_STATS);
+}