ubi-utils: add ubiattach and ubidetach

Add 2 new utilities to attach and detach UBI devices.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 200 insertions, 0 deletions

diff --git a/ubi-utils/src/ubidetach.c b/ubi-utils/src/ubidetach.c
new file mode 100644
index 0000000..cde21d0
--- /dev/null
+++ b/ubi-utils/src/ubidetach.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * An utility to delete UBI devices (detach MTD devices from UBI).
+ *
+ * Author: Artem Bityutskiy
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <libubi.h>
+#include "common.h"
+
+#define PROGRAM_VERSION "1.0"
+#define PROGRAM_NAME    "ubidetach"
+
+/* The variables below are set by command line arguments */
+struct args {
+	int devn;
+	int mtdn;
+	const char *node;
+};
+
+static struct args myargs = {
+	.devn = UBI_DEV_NUM_AUTO,
+	.mtdn = -1,
+	.node = NULL,
+};
+
+static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
+" - a tool to remove UBI devices (detach MTD devices from UBI)";
+
+static const char *optionsstr =
+"-d, --devn=<UBI device number>  UBI device number to delete\n"
+"-m, --mtdn=<MTD device number>  or altrnatively, MTD device number to detach -\n"
+"                                this will delete corresponding UBI device\n"
+"-h, --help                      print help message\n"
+"-V, --version                   print program version";
+
+static const char *usage =
+"Usage: " PROGRAM_NAME "<UBI control device node file name> [-d <UBI device number>] [-m <MTD device number>]\n"
+"\t\t[--devn <UBI device number>] [--mtdn=<MTD device number>]\n"
+"Example 1: " PROGRAM_NAME " /dev/ubi_ctrl -d 2 - delete UBI device 2 (ubi2)\n"
+"Example 2: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 - detach MTD device 0 (mtd0)";
+
+static const struct option long_options[] = {
+	{ .name = "devn",    .has_arg = 1, .flag = NULL, .val = 'd' },
+	{ .name = "mtdn",    .has_arg = 1, .flag = NULL, .val = 'm' },
+	{ .name = "help",    .has_arg = 0, .flag = NULL, .val = 'h' },
+	{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
+	{ NULL, 0, NULL, 0},
+};
+
+static int parse_opt(int argc, char * const argv[])
+{
+	while (1) {
+		int key;
+		char *endp;
+
+		key = getopt_long(argc, argv, "m:d:hV", long_options, NULL);
+		if (key == -1)
+			break;
+
+		switch (key) {
+		case 'd':
+			myargs.devn = strtoul(optarg, &endp, 0);
+			if (*endp != '\0' || endp == optarg || myargs.devn < 0) {
+				errmsg("bad UBI device number: \"%s\"", optarg);
+				return -1;
+			}
+
+			break;
+
+		case 'm':
+			myargs.mtdn = strtoul(optarg, &endp, 0);
+			if (*endp != '\0' || endp == optarg || myargs.mtdn < 0) {
+				errmsg("bad MTD device number: \"%s\"", optarg);
+				return -1;
+			}
+
+			break;
+
+		case 'h':
+			fprintf(stderr, "%s\n\n", doc);
+			fprintf(stderr, "%s\n\n", usage);
+			fprintf(stderr, "%s\n", optionsstr);
+			exit(0);
+
+		case 'V':
+			fprintf(stderr, "%s\n", PROGRAM_VERSION);
+			exit(0);
+
+		case ':':
+			errmsg("parameter is missing");
+			return -1;
+
+		default:
+			fprintf(stderr, "Use -h for help\n");
+			exit(-1);
+		}
+	}
+
+	if (optind == argc) {
+		errmsg("UBI control device name was not specified (use -h for help)");
+		return -1;
+	} else if (optind != argc - 1) {
+		errmsg("more then one UBI control device specified (use -h for help)");
+		return -1;
+	}
+
+	if (myargs.mtdn == -1 && myargs.devn == -1) {
+		errmsg("neither MTD nor UBI devices were specified (use -h for help)");
+		return -1;
+	}
+
+	if (myargs.mtdn != -1 && myargs.devn != -1) {
+		errmsg("specify either MTD or UBI device (use -h for help)");
+		return -1;
+	}
+
+	myargs.node = argv[optind];
+	return 0;
+}
+
+int main(int argc, char * const argv[])
+{
+	int err;
+	libubi_t libubi;
+	struct ubi_info ubi_info;
+
+	err = parse_opt(argc, argv);
+	if (err)
+		return -1;
+
+	libubi = libubi_open();
+	if (libubi == NULL) {
+		errmsg("cannot open libubi");
+		perror("libubi_open");
+		return -1;
+	}
+
+	/*
+	 * Make sure the kernel is fresh enough and this feature is supported.
+	 */
+	err = ubi_get_info(libubi, &ubi_info);
+	if (err) {
+		errmsg("cannot get UBI information");
+		perror("ubi_get_info");
+		goto out_libubi;
+	}
+
+	if (ubi_info.ctrl_major == -1) {
+		errmsg("MTD detach/detach feature is not supported by your kernel");
+		goto out_libubi;
+	}
+
+	if (myargs.devn != -1) {
+		err = ubi_remove_dev(libubi, myargs.node, myargs.devn);
+		if (err) {
+			errmsg("cannot remove ubi%d", myargs.devn);
+			perror("ubi_remove_dev");
+			goto out_libubi;
+		}
+	} else {
+		err = ubi_detach_mtd(libubi, myargs.node, myargs.mtdn);
+		if (err) {
+			errmsg("cannot detach mtd%d", myargs.mtdn);
+			perror("ubi_detach_mtd");
+			goto out_libubi;
+		}
+	}
+
+	libubi_close(libubi);
+	return 0;
+
+out_libubi:
+	libubi_close(libubi);
+	return -1;
+}
+