restorer: move log descriptor from crtools (v2)

v2: add FIXME for linking restorer-log.c and restorer.c by ld
    I don't know how to do it now.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -1530,6 +1530,7 @@ static void sigreturn_restore(pid_t pstree_pid, pid_t pid)
 	task_args->pid		= pid;
 	task_args->fd_core	= fd_core;
 	task_args->fd_self_vmas	= fd_self_vmas;
+	task_args->logfd	= get_logfd();
 
 	cr_mutex_init(&task_args->rst_lock);
 
@@ -1586,7 +1587,6 @@ static void sigreturn_restore(pid_t pstree_pid, pid_t pid)
 		task_args->thread_args);
 
 	close_safe(&fd_pstree);
-	fini_log();
 
 	/*
 	 * An indirect call to task_restore, note it never resturns

include/restorer-log.h

@@ -0,0 +1,11 @@
+#ifndef RESTORER_LOG_H__
+#define RESTORER_LOG_H__
+extern long vprint_num(char *buf, long num);
+
+extern void write_hex_n(unsigned long num);
+extern void write_num_n(long num);
+extern void write_num(long num);
+extern void write_string_n(char *str);
+extern void write_string(char *str);
+extern void set_logfd(int fd);
+#endif

include/restorer.h

@@ -67,6 +67,7 @@ struct task_restore_core_args {
 	int				fd_core;		/* opened core file */
 	int				fd_self_vmas;		/* opened file with running VMAs to unmap */
 	char				ns_last_pid_path[sizeof(LAST_PID_PATH) + 1];
+	int				logfd;
 	bool				restore_threads;	/* if to restore threads */
 	u32				rst_lock;
 
@@ -173,118 +174,6 @@ struct rt_sigframe {
 	/* fp state follows here */
 };
 
-#define add_ord(c)			\
-	do {				\
-		if (c < 10)		\
-			c += '0';	\
-		else			\
-			c += 'a' - 10;	\
-	} while (0)
-
-static void always_inline write_char(char c)
-{
-	sys_write(STDERR_FILENO, &c, 1);
-}
-
-static void always_inline write_string(char *str)
-{
-	int len = 0;
-
-	while (str[len])
-		len++;
-
-	sys_write(STDERR_FILENO, str, len);
-}
-
-static void always_inline write_string_n(char *str)
-{
-	char new_line = '\n';
-
-	write_string(str);
-	sys_write(STDERR_FILENO, &new_line, 1);
-}
-
-static void always_inline write_num_n(long num)
-{
-	unsigned long d = 1000000000000000000;
-	unsigned int started = 0;
-	unsigned int minus = 0;
-	unsigned int c;
-
-	if (num < 0) {
-		num = -num;
-		c = '-';
-		sys_write(STDERR_FILENO, &c, 1);
-	}
-
-	while (d) {
-		c = num / d;
-		num -= d * c;
-		d /= 10;
-		if (!c && !started)
-			continue;
-		if (!started)
-			started = 1;
-		add_ord(c);
-		sys_write(STDERR_FILENO, &c, 1);
-
-	}
-	c = '\n';
-	sys_write(STDERR_FILENO, &c, 1);
-}
-
-static long always_inline vprint_num(char *buf, long num)
-{
-	unsigned long d = 1000000000000000000;
-	unsigned int started = 0;
-	unsigned int minus = 0;
-	unsigned int i = 0;
-	unsigned int c;
-
-	if (num < 0) {
-		num = -num;
-		buf[i++] = '-';
-	}
-
-	while (d) {
-		c = num / d;
-		num -= d * c;
-		d /= 10;
-		if (!c && !started)
-			continue;
-		if (!started)
-			started = 1;
-		add_ord(c);
-		buf[i++] = c;
-
-	}
-
-	buf[i++] = 0;
-
-	return i;
-}
-
-static void always_inline write_hex_n(unsigned long num)
-{
-	unsigned char *s = (unsigned char *)&num;
-	unsigned char c;
-	int i;
-
-	c = 'x';
-	sys_write(STDERR_FILENO, &c, 1);
-	for (i = sizeof(long)/sizeof(char) - 1; i >= 0; i--) {
-		c = (s[i] & 0xf0) >> 4;
-		add_ord(c);
-		sys_write(STDERR_FILENO, &c, 1);
-
-		c = (s[i] & 0x0f);
-		add_ord(c);
-		sys_write(STDERR_FILENO, &c, 1);
-	}
-
-	c = '\n';
-	sys_write(STDERR_FILENO, &c, 1);
-}
 
 #define SHMEMS_SIZE	4096
 

restorer-log.c

@@ -0,0 +1,128 @@
+#include "restorer-log.h"
+#include "syscall.h"
+
+static int logfd;
+
+void set_logfd(int fd)
+{
+	logfd = fd;
+}
+
+#define add_ord(c)			\
+	do {				\
+		if (c < 10)		\
+			c += '0';	\
+		else			\
+			c += 'a' - 10;	\
+	} while (0)
+
+static void always_inline write_char(char c)
+{
+	sys_write(logfd, &c, 1);
+}
+
+void always_inline write_string(char *str)
+{
+	int len = 0;
+
+	while (str[len])
+		len++;
+
+	sys_write(logfd, str, len);
+}
+
+void always_inline write_string_n(char *str)
+{
+	char new_line = '\n';
+
+	write_string(str);
+	sys_write(logfd, &new_line, 1);
+}
+
+void always_inline write_num(long num)
+{
+	unsigned long d = 1000000000000000000;
+	unsigned int started = 0;
+	unsigned int minus = 0;
+	unsigned int c;
+
+	if (num < 0) {
+		num = -num;
+		c = '-';
+		sys_write(logfd, &c, 1);
+	}
+
+	while (d) {
+		c = num / d;
+		num -= d * c;
+		d /= 10;
+		if (!c && !started)
+			continue;
+		if (!started)
+			started = 1;
+		add_ord(c);
+		sys_write(logfd, &c, 1);
+
+	}
+}
+
+void always_inline write_num_n(long num)
+{
+	unsigned char c;
+	write_num(num);
+	c = '\n';
+	sys_write(logfd, &c, sizeof(c));
+}
+
+long always_inline vprint_num(char *buf, long num)
+{
+	unsigned long d = 1000000000000000000;
+	unsigned int started = 0;
+	unsigned int minus = 0;
+	unsigned int i = 0;
+	unsigned int c;
+
+	if (num < 0) {
+		num = -num;
+		buf[i++] = '-';
+	}
+
+	while (d) {
+		c = num / d;
+		num -= d * c;
+		d /= 10;
+		if (!c && !started)
+			continue;
+		if (!started)
+			started = 1;
+		add_ord(c);
+		buf[i++] = c;
+
+	}
+
+	buf[i++] = 0;
+
+	return i;
+}
+
+void always_inline write_hex_n(unsigned long num)
+{
+	unsigned char *s = (unsigned char *)&num;
+	unsigned char c;
+	int i;
+
+	c = 'x';
+	sys_write(logfd, &c, 1);
+	for (i = sizeof(long)/sizeof(char) - 1; i >= 0; i--) {
+		c = (s[i] & 0xf0) >> 4;
+		add_ord(c);
+		sys_write(logfd, &c, 1);
+
+		c = (s[i] & 0x0f);
+		add_ord(c);
+		sys_write(logfd, &c, 1);
+	}
+
+	c = '\n';
+	sys_write(logfd, &c, 1);
+}

restorer.c

@@ -16,6 +16,7 @@
 #include "image.h"
 
 #include "crtools.h"
+#include "restorer-log.h"
 #include "lock.h"
 #include "restorer.h"
 
@@ -131,6 +132,8 @@ long restore_task(struct task_restore_core_args *args)
 	unsigned long new_sp, fsgs_base;
 	pid_t my_pid = sys_getpid();
 
+	set_logfd(args->logfd);
+
 	core_entry	= first_on_heap(core_entry, args->mem_zone.heap);
 	vma_entry	= next_on_heap(vma_entry, core_entry);
 
@@ -514,6 +517,8 @@ long restore_task(struct task_restore_core_args *args)
 		goto core_restore_end;
 	}
 
+	sys_close(args->logfd);
+
 	/*
 	 * Sigframe stack.
 	 */
@@ -540,3 +545,6 @@ core_restore_end:
 		local_sleep(5);
 	sys_exit(0);
 }
+
+/* FIXME Need link this .o with ld */
+#include "restorer-log.c"