check: Introduce --ms option

This option skips checking for features, that are known to
be absent in mainstream kernel.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-check.c

@@ -459,6 +459,11 @@ int check_ptrace_peeksiginfo()
 	siginfo_t siginfo;
 	pid_t pid, ret = 0;
 
+	if (opts.check_ms_kernel) {
+		pr_warn("Skipping peeking siginfos check (not yet merged)\n");
+		return 0;
+	}
+
 	pid = fork();
 	if (pid < 0)
 		pr_perror("fork");
@@ -489,11 +494,16 @@ int check_ptrace_peeksiginfo()
 
 static int check_mem_dirty_track(void)
 {
+	if (opts.check_ms_kernel) {
+		pr_warn("Skipping dirty tracking check (not yet merged)\n");
+		return 0;
+	}
+
 	if (kerndat_get_dirty_track() < 0)
 		return -1;
 
 	if (!kerndat_has_dirty_track)
-		pr_info("Dirty tracking is OFF. Memory snapshot will not work.\n");
+		pr_warn("Dirty tracking is OFF. Memory snapshot will not work.\n");
 	return 0;
 }
 

crtools.c

@@ -114,6 +114,7 @@ int main(int argc, char *argv[])
 			{ "address", required_argument, 0, 51},
 			{ "port", required_argument, 0, 52},
 			{ "snapshot", optional_argument, 0, 53},
+			{ "ms", no_argument, 0, 54},
 			{ },
 		};
 
@@ -264,6 +265,9 @@ int main(int argc, char *argv[])
 			opts.mem_snapshot = true;
 			opts.snap_parent = optarg;
 			break;
+		case 54:
+			opts.check_ms_kernel = true;
+			break;
 		case 'V':
 			pr_msg("Version: %s\n", version);
 			return 0;
@@ -413,6 +417,7 @@ usage:
 	pr_msg("\nOther options:\n");
 	pr_msg("  -h|--help             show this text\n");
 	pr_msg("  -V|--version          show version\n");
+	pr_msg("     --ms               don't check not yet merged kernel features\n");
 
 	return -1;
 

include/crtools.h

@@ -100,6 +100,7 @@ struct script {
 struct cr_options {
 	int			final_state;
 	char			*show_dump_file;
+	bool			check_ms_kernel;
 	bool			show_pages_content;
 	bool			restore_detach;
 	bool			ext_unix_sk;

sockets.c

@@ -612,6 +612,11 @@ int collect_sockets(int pid)
 			err = tmp;
 	}
 
+	if (pid == 0 && opts.check_ms_kernel) {
+		pr_warn("Skipping netling diag check (not yet merged)\n");
+		goto skip;
+	}
+
 	req.r.n.sdiag_family	= AF_NETLINK;
 	req.r.n.sdiag_protocol	= NDIAG_PROTO_ALL;
 	req.r.n.ndiag_show	= NDIAG_SHOW_GROUPS;
@@ -621,7 +626,7 @@ int collect_sockets(int pid)
 		if (pid == 0 || tmp != -ENOENT) /* Going to be in 3.10 */
 			err = tmp;
 	}
-
+skip:
 	close(nl);
 out:
 	if (rst >= 0) {