Merge branch 'master' of git://git.infradead.org/mtd-utils

12 files changed, 251 insertions, 49 deletions

diff --git a/common.mk b/common.mk
index 5e92b07..d704b44 100644
--- a/common.mk
+++ b/common.mk
@@ -12,7 +12,10 @@ WFLAGS := -Wall \
 	$(call cc-option,-Wwrite-strings) \
 	$(call cc-option,-Wno-sign-compare)
 CFLAGS += $(WFLAGS)
-CPPFLAGS += -D_FILE_OFFSET_BITS=64
+
+ifneq ($(WITHOUT_LARGEFILE), 1)
+  CPPFLAGS += -D_FILE_OFFSET_BITS=64
+endif
 
 DESTDIR ?= /usr/local
 PREFIX=/usr
diff --git a/mkfs.jffs2.c b/mkfs.jffs2.c
index 23a8cf8..64cafb6 100644
--- a/mkfs.jffs2.c
+++ b/mkfs.jffs2.c
@@ -1468,6 +1468,7 @@ static struct option long_options[] = {
 	{"devtable", 1, NULL, 'D'},
 	{"compression-mode", 1, NULL, 'm'},
 	{"disable-compressor", 1, NULL, 'x'},
+	{"enable-compressor", 1, NULL, 'X'},
 	{"test-compression", 0, NULL, 't'},
 	{"compressor-priority", 1, NULL, 'y'},
 	{"incremental", 1, NULL, 'i'},
diff --git a/mtd_debug.c b/mtd_debug.c
index 85d48e9..49a4567 100644
--- a/mtd_debug.c
+++ b/mtd_debug.c
@@ -110,7 +110,7 @@ int flash_to_file (int fd,u_int32_t offset,size_t len,const char *filename)
 		perror ("lseek()");
 		goto err0;
 	}
-	outfd = creat (filename,O_WRONLY);
+	outfd = creat (filename,0666);
 	if (outfd < 0)
 	{
 		perror ("creat()");
diff --git a/nanddump.c b/nanddump.c
index 678d684..ae0e425 100644
--- a/nanddump.c
+++ b/nanddump.c
@@ -209,7 +209,9 @@ int main(int argc, char * const argv[])
 	}
 
 	/* Make sure device page sizes are valid */
-	if (!(meminfo.oobsize == 128 && meminfo.writesize == 4096) &&
+	if (!(meminfo.oobsize == 224 && meminfo.writesize == 4096) &&
+			!(meminfo.oobsize == 218 && meminfo.writesize == 4096) &&
+			!(meminfo.oobsize == 128 && meminfo.writesize == 4096) &&
 			!(meminfo.oobsize == 64 && meminfo.writesize == 2048) &&
 			!(meminfo.oobsize == 32 && meminfo.writesize == 1024) &&
 			!(meminfo.oobsize == 16 && meminfo.writesize == 512) &&
diff --git a/nandtest.c b/nandtest.c
index 7613a52..e31e28a 100644
--- a/nandtest.c
+++ b/nandtest.c
@@ -259,7 +259,7 @@ int main(int argc, char **argv)
 				printf("\r%08x: reading... ", (unsigned)test_ofs);
 				fflush(stdout);
 
-				len = pread(fd, rbuf, meminfo.erasesize, test_ofs);
+				len = pread(fd, kbuf, meminfo.erasesize, test_ofs);
 				if (len < meminfo.erasesize) {
 					printf("\n");
 					if (len)
diff --git a/ubi-utils/include/libubi.h b/ubi-utils/include/libubi.h
index f52904d..64b5eed 100644
--- a/ubi-utils/include/libubi.h
+++ b/ubi-utils/include/libubi.h
@@ -44,6 +44,7 @@ typedef void * libubi_t;
  *           (%UBI_DEV_NUM_AUTO should be used to automatically assign the
  *           number)
  * @mtd_num: MTD device number to attach
+ * @dev: path to device node to attach
  * @vid_hdr_offset: VID header offset (%0 means default offset and this is what
  *                  most of the users want)
  */
@@ -51,6 +52,7 @@ struct ubi_attach_request
 {
 	int dev_num;
 	int mtd_num;
+	const char *dev;
 	int vid_hdr_offset;
 };
 
@@ -219,6 +221,23 @@ int ubi_attach_mtd(libubi_t desc, const char *node,
 		   struct ubi_attach_request *req);
 
 /**
+ * ubi_attach - attach an MTD device by its node path.
+ * @desc: UBI library descriptor
+ * @node: name of the UBI control character device node
+ * @req: MTD attach request
+ *
+ * This function creates new UBI device by attaching an MTD device described by
+ * @req. If @req->dev is given it should contain path to the MTD device node.
+ * Otherwise functionality is similar than in function 'ubi_attach_mtd()' where
+ * @req->mtd_num is used.
+ *
+ * Returns %0 in case of success and %-1 in case of failure (errno is set). The
+ * newly created UBI device number is returned in @req->dev_num.
+ */
+int ubi_attach(libubi_t desc, const char *node,
+	       struct ubi_attach_request *req);
+
+/**
  * ubi_detach_mtd - detach an MTD device.
  * @desc: UBI library descriptor
  * @node: name of the UBI control character device node
@@ -231,6 +250,17 @@ int ubi_attach_mtd(libubi_t desc, const char *node,
 int ubi_detach_mtd(libubi_t desc, const char *node, int mtd_num);
 
 /**
+ * ubi_detach - detach an MTD device by its node path.
+ * @desc: UBI library descriptor
+ * @node: name of the UBI control character device node
+ * @dev: path to an MTD device node
+ *
+ * This function detaches an MTD device @dev from UBI. Returns zero in case of
+ * success and %-1 in case of failure.
+ */
+int ubi_detach(libubi_t desc, const char *node, const char *dev);
+
+/**
  * ubi_remove_dev - remove an UBI device.
  * @desc: UBI library descriptor
  * @node: name of the UBI control character device node
diff --git a/ubi-utils/src/libubi.c b/ubi-utils/src/libubi.c
index fd97774..2f19bd7 100644
--- a/ubi-utils/src/libubi.c
+++ b/ubi-utils/src/libubi.c
@@ -677,35 +677,120 @@ void libubi_close(libubi_t desc)
 	free(lib);
 }
 
-int ubi_attach_mtd(libubi_t desc, const char *node,
-		   struct ubi_attach_request *req)
+/**
+ * do_attach - perform the actual attach operation.
+ * @node: name of the UBI control character device node
+ * @r: attach request
+ *
+ * This function performs the actual UBI attach operation. Returns %0 in case of
+ * success and %-1 in case of failure. @r->ubi_num contains newly created UBI
+ * device number.
+ */
+static int do_attach(const char *node, const struct ubi_attach_req *r)
 {
 	int fd, ret;
-	struct ubi_attach_req r;
-
-	memset(&r, 0, sizeof(struct ubi_attach_req));
-
-	desc = desc;
-	r.ubi_num = req->dev_num;
-	r.mtd_num = req->mtd_num;
-	r.vid_hdr_offset = req->vid_hdr_offset;
 
 	fd = open(node, O_RDONLY);
 	if (fd == -1)
 		return sys_errmsg("cannot open \"%s\"", node);
 
-	ret = ioctl(fd, UBI_IOCATT, &r);
+	ret = ioctl(fd, UBI_IOCATT, r);
 	close(fd);
 	if (ret == -1)
 		return -1;
 
-	req->dev_num = r.ubi_num;
-
 #ifdef UDEV_SETTLE_HACK
 //	if (system("udevsettle") == -1)
 //		return -1;
 	usleep(100000);
 #endif
+	return ret;
+}
+
+int ubi_attach_mtd(libubi_t desc, const char *node,
+		   struct ubi_attach_request *req)
+{
+	struct ubi_attach_req r;
+	int ret;
+
+	(void)desc;
+
+	memset(&r, 0, sizeof(struct ubi_attach_req));
+	r.ubi_num = req->dev_num;
+	r.mtd_num = req->mtd_num;
+	r.vid_hdr_offset = req->vid_hdr_offset;
+
+	ret = do_attach(node, &r);
+	if (ret == 0)
+		req->dev_num = r.ubi_num;
+
+	return ret;
+}
+
+#ifndef MTD_CHAR_MAJOR
+/*
+ * This is taken from kernel <linux/mtd/mtd.h> and is unlikely to change anytime
+ * soon.
+ */
+#define MTD_CHAR_MAJOR 90
+#endif
+
+/**
+ * dev_to_mtdnum - converts device node to MTD number.
+ * @dev: path to device node to convert
+ *
+ * This function converts given @dev to MTD device number. @dev should contain
+ * path to the MTD device node. Returns MTD device number in case of success and
+ * %-1 in case of failure (errno is set).
+ */
+static int dev_to_mtdnum(const char *dev)
+{
+	int major, minor;
+	struct stat sb;
+
+	if (stat(dev, &sb) < 0)
+		return sys_errmsg("cannot stat \"%s\"", dev);
+
+	if (!S_ISCHR(sb.st_mode)) {
+		errno = EINVAL;
+		return sys_errmsg("\"%s\" is not a character device", dev);
+	}
+
+	major = major(sb.st_rdev);
+	minor = minor(sb.st_rdev);
+
+	if (major != MTD_CHAR_MAJOR) {
+		errno = EINVAL;
+		return sys_errmsg("\"%s\" is not an MTD device", dev);
+	}
+
+	return minor / 2;
+}
+
+int ubi_attach(libubi_t desc, const char *node, struct ubi_attach_request *req)
+{
+	struct ubi_attach_req r;
+	int ret;
+
+	if (!req->dev)
+		/* Fallback to opening by mtd_num */
+		return ubi_attach_mtd(desc, node, req);
+
+	memset(&r, 0, sizeof(struct ubi_attach_req));
+	r.ubi_num = req->dev_num;
+	r.vid_hdr_offset = req->vid_hdr_offset;
+
+	/*
+	 * User has passed path to device node. Lets find out MTD device number
+	 * of the device and pass it to the kernel.
+	 */
+	r.mtd_num = dev_to_mtdnum(req->dev);
+	if (r.mtd_num == -1)
+		return -1;
+
+	ret = do_attach(node, &r);
+	if (ret == 0)
+		req->dev_num = r.ubi_num;
 
 	return ret;
 }
@@ -723,6 +808,22 @@ int ubi_detach_mtd(libubi_t desc, const char *node, int mtd_num)
 	return ubi_remove_dev(desc, node, ubi_dev);
 }
 
+int ubi_detach(libubi_t desc, const char *node, const char *dev)
+{
+	int mtd_num;
+
+	if (!dev) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	mtd_num = dev_to_mtdnum(dev);
+	if (mtd_num == -1)
+		return -1;
+
+	return ubi_detach_mtd(desc, node, mtd_num);
+}
+
 int ubi_remove_dev(libubi_t desc, const char *node, int ubi_dev)
 {
 	int fd, ret;
diff --git a/ubi-utils/src/libubi_int.h b/ubi-utils/src/libubi_int.h
index 6d17d57..c3aa37a 100644
--- a/ubi-utils/src/libubi_int.h
+++ b/ubi-utils/src/libubi_int.h
@@ -83,6 +83,7 @@ extern "C" {
  *                handling
  * @dev_max_vols: maximum volumes number count sysfs path pattern
  * @dev_min_io_size: minimum I/O unit size sysfs path pattern
+ * @dev_mtd_num: MTD device number
  * @ubi_vol: UBI volume sysfs directory pattern
  * @vol_type: volume type sysfs path pattern
  * @vol_dev: volume major/minor numbers file pattern
diff --git a/ubi-utils/src/ubiattach.c b/ubi-utils/src/ubiattach.c
index a935b42..67f8c85 100644
--- a/ubi-utils/src/ubiattach.c
+++ b/ubi-utils/src/ubiattach.c
@@ -39,6 +39,7 @@ struct args {
 	int mtdn;
 	int vidoffs;
 	const char *node;
+	const char *dev;
 };
 
 static struct args args = {
@@ -46,6 +47,7 @@ static struct args args = {
 	.mtdn = -1,
 	.vidoffs = 0,
 	.node = NULL,
+	.dev = NULL,
 };
 
 static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
@@ -55,7 +57,9 @@ static const char *optionsstr =
 "-d, --devn=<UBI device number>  the number to assign to the newly created UBI device\n"
 "                                (the number is assigned automatically if this is not\n"
 "                                specified\n"
-"-m, --mtdn=<MTD device number>  MTD device number to attach\n"
+"-p, --dev-path=<path to device> path to MTD device node to attach\n"
+"-m, --mtdn=<MTD device number>  MTD device number to attach (alternative method, e.g\n"
+"                                if the character device node does not exist)\n"
 "-O, --vid-hdr-offset            VID header offset (do not specify this unless you\n"
 "                                really know what you do and the optimal defaults will\n"
 "                                be used)\n"
@@ -63,14 +67,18 @@ static const char *optionsstr =
 "-V, --version                   print program version";
 
 static const char *usage =
-"Usage: " PROGRAM_NAME " <UBI control device node file name> [-m <MTD device number>] [-d <UBI device number>]\n"
-"\t\t[--mtdn=<MTD device number>] [--devn <UBI device number>]\n"
-"Example 1: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 - attach MTD device 0 (mtd0) to UBI\n"
-"Example 2: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 -d 3 - attach MTD device 0 (mtd0) to UBI and\n"
+"Usage: " PROGRAM_NAME " <UBI control device node file name>\n"
+"\t[-m <MTD device number>] [-d <UBI device number>] [-p <path to device>]\n"
+"\t[--mtdn=<MTD device number>] [--devn=<UBI device number>]\n"
+"\t[--dev-path=<path to device>]\n"
+"Example 1: " PROGRAM_NAME " /dev/ubi_ctrl -p /dev/mtd0 - attach /dev/mtd0 to UBI\n"
+"Example 2: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 - attach MTD device 0 (mtd0) to UBI\n"
+"Example 3: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 -d 3 - attach MTD device 0 (mtd0) to UBI and\n"
 "           and create UBI device number 3 (ubi3)";
 
 static const struct option long_options[] = {
 	{ .name = "devn",           .has_arg = 1, .flag = NULL, .val = 'd' },
+	{ .name = "dev-path",       .has_arg = 1, .flag = NULL, .val = 'p' },
 	{ .name = "mtdn",           .has_arg = 1, .flag = NULL, .val = 'm' },
 	{ .name = "vid-hdr-offset", .has_arg = 1, .flag = NULL, .val = 'O' },
 	{ .name = "help",           .has_arg = 0, .flag = NULL, .val = 'h' },
@@ -84,11 +92,14 @@ static int parse_opt(int argc, char * const argv[])
 		int key;
 		char *endp;
 
-		key = getopt_long(argc, argv, "m:d:O:hV", long_options, NULL);
+		key = getopt_long(argc, argv, "p:m:d:O:hV", long_options, NULL);
 		if (key == -1)
 			break;
 
 		switch (key) {
+		case 'p':
+			args.dev = optarg;
+			break;
 		case 'd':
 			args.devn = strtoul(optarg, &endp, 0);
 			if (*endp != '\0' || endp == optarg || args.devn < 0)
@@ -134,8 +145,8 @@ static int parse_opt(int argc, char * const argv[])
 	else if (optind != argc - 1)
 		return errmsg("more then one UBI control device specified (use -h for help)");
 
-	if (args.mtdn == -1)
-		return errmsg("MTD device number was not specified (use -h for help)");
+	if (args.mtdn == -1 && args.dev == NULL)
+		return errmsg("MTD device to attach was not specified (use -h for help)");
 
 	args.node = argv[optind];
 	return 0;
@@ -177,10 +188,14 @@ int main(int argc, char * const argv[])
 	req.dev_num = args.devn;
 	req.mtd_num = args.mtdn;
 	req.vid_hdr_offset = args.vidoffs;
+	req.dev = args.dev;
 
-	err = ubi_attach_mtd(libubi, args.node, &req);
+	err = ubi_attach(libubi, args.node, &req);
 	if (err) {
-		sys_errmsg("cannot attach mtd%d", args.mtdn);
+		if (args.dev)
+			sys_errmsg("cannot attach \"%s\"", args.dev);
+		else
+			sys_errmsg("cannot attach mtd%d", args.mtdn);
 		goto out_libubi;
 	}
 
diff --git a/ubi-utils/src/ubidetach.c b/ubi-utils/src/ubidetach.c
index 83584cd..335486d 100644
--- a/ubi-utils/src/ubidetach.c
+++ b/ubi-utils/src/ubidetach.c
@@ -38,12 +38,14 @@ struct args {
 	int devn;
 	int mtdn;
 	const char *node;
+	const char *dev;
 };
 
 static struct args args = {
 	.devn = UBI_DEV_NUM_AUTO,
 	.mtdn = -1,
 	.node = NULL,
+	.dev = NULL,
 };
 
 static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
@@ -51,22 +53,26 @@ static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
 
 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"
+"-p, --dev-path=<path to device> or alternatively, MTD device node path to detach\n"
+"-m, --mtdn=<MTD device number>  or alternatively, MTD device number to detach\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)";
+"Usage: " PROGRAM_NAME " <UBI control device node file name>\n"
+"\t[-d <UBI device number>] [-m <MTD device number>] [-p <path to device>]\n"
+"\t[--devn=<UBI device number>] [--mtdn=<MTD device number>]\n"
+"\t[--dev-path=<path to device>]\n"
+"Example 1: " PROGRAM_NAME " /dev/ubi_ctrl -p /dev/mtd0 - detach MTD device /dev/mtd0\n"
+"Example 2: " PROGRAM_NAME " /dev/ubi_ctrl -d 2 - delete UBI device 2 (ubi2)\n"
+"Example 3: " 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' },
+	{ .name = "devn",     .has_arg = 1, .flag = NULL, .val = 'd' },
+	{ .name = "dev-path", .has_arg = 1, .flag = NULL, .val = 'p' },
+	{ .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},
 };
 
@@ -76,11 +82,14 @@ static int parse_opt(int argc, char * const argv[])
 		int key;
 		char *endp;
 
-		key = getopt_long(argc, argv, "m:d:hV", long_options, NULL);
+		key = getopt_long(argc, argv, "p:m:d:hV", long_options, NULL);
 		if (key == -1)
 			break;
 
 		switch (key) {
+		case 'p':
+			args.dev = optarg;
+			break;
 		case 'd':
 			args.devn = strtoul(optarg, &endp, 0);
 			if (*endp != '\0' || endp == optarg || args.devn < 0)
@@ -119,11 +128,15 @@ static int parse_opt(int argc, char * const argv[])
 	else if (optind != argc - 1)
 		return errmsg("more then one UBI control device specified (use -h for help)");
 
-	if (args.mtdn == -1 && args.devn == -1)
+	if (args.mtdn == -1 && args.devn == -1 && args.dev == NULL)
 		return errmsg("neither MTD nor UBI devices were specified (use -h for help)");
 
-	if (args.mtdn != -1 && args.devn != -1)
-		return errmsg("specify either MTD or UBI device (use -h for help)");
+	if (args.devn != -1) {
+		if (args.mtdn != -1 || args.dev != NULL)
+			return errmsg("specify either MTD or UBI device (use -h for help)");
+
+	} else if (args.mtdn != -1 && args.dev != NULL)
+		return errmsg("specify either MTD number or device node (use -h for help)");
 
 	args.node = argv[optind];
 	return 0;
@@ -167,10 +180,18 @@ int main(int argc, char * const argv[])
 			goto out_libubi;
 		}
 	} else {
-		err = ubi_detach_mtd(libubi, args.node, args.mtdn);
-		if (err) {
-			sys_errmsg("cannot detach mtd%d", args.mtdn);
-			goto out_libubi;
+		if (args.dev != NULL) {
+			err = ubi_detach(libubi, args.node, args.dev);
+			if (err) {
+				sys_errmsg("cannot detach \"%s\"", args.dev);
+				goto out_libubi;
+			}
+		} else {
+			err = ubi_detach_mtd(libubi, args.node, args.mtdn);
+			if (err) {
+				sys_errmsg("cannot detach mtd%d", args.mtdn);
+				goto out_libubi;
+			}
 		}
 	}
 
diff --git a/ubi-utils/src/ubiformat.c b/ubi-utils/src/ubiformat.c
index 2316d67..8ad5051 100644
--- a/ubi-utils/src/ubiformat.c
+++ b/ubi-utils/src/ubiformat.c
@@ -44,7 +44,7 @@
 #include "crc32.h"
 #include "common.h"
 
-#define PROGRAM_VERSION "1.4"
+#define PROGRAM_VERSION "1.5"
 #define PROGRAM_NAME    "ubiformat"
 
 /* The variables below are set by command line arguments */
diff --git a/ubi-utils/src/ubinfo.c b/ubi-utils/src/ubinfo.c
index 8c5a1a9..8f84382 100644
--- a/ubi-utils/src/ubinfo.c
+++ b/ubi-utils/src/ubinfo.c
@@ -39,6 +39,7 @@ struct args {
 	int vol_id;
 	int all;
 	const char *node;
+	const char *vol_name;
 };
 
 static struct args args = {
@@ -46,6 +47,7 @@ static struct args args = {
 	.devn = -1,
 	.all = 0,
 	.node = NULL,
+	.vol_name = NULL,
 };
 
 static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
@@ -54,6 +56,7 @@ static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
 static const char *optionsstr =
 "-d, --devn=<UBI device number>  UBI device number to get information about\n"
 "-n, --vol_id=<volume ID>        ID of UBI volume to print information about\n"
+"-N, --name=<volume name>        name of UBI volume to print information about\n"
 "-a, --all                       print information about all devices and volumes,\n"
 "                                or about all volumes if the UBI device was\n"
 "                                specified\n"
@@ -61,8 +64,8 @@ static const char *optionsstr =
 "-V, --version                   print program version";
 
 static const char *usage =
-"Usage 1: " PROGRAM_NAME " [-d <UBI device number>] [-n <volume ID>] [-a] [-h] [-V] [--vol_id=<volume ID>]\n"
-"\t\t[--devn <UBI device number>] [--all] [--help] [--version]\n"
+"Usage 1: " PROGRAM_NAME " [-d <UBI device number>] [-n <volume ID> | -N <volume name>] [-a] [-h] [-V]\n"
+"\t\t[--vol_id=<volume ID> | --name <volume name>] [--devn <UBI device number>] [--all] [--help] [--version]\n"
 "Usage 2: " PROGRAM_NAME " <UBI device node file name> [-a] [-h] [-V] [--all] [--help] [--version]\n"
 "Usage 3: " PROGRAM_NAME " <UBI volume node file name> [-h] [-V] [--help] [--version]\n\n"
 "Example 1: " PROGRAM_NAME " - (no arguments) print general UBI information\n"
@@ -75,6 +78,7 @@ static const char *usage =
 static const struct option long_options[] = {
 	{ .name = "devn",      .has_arg = 1, .flag = NULL, .val = 'd' },
 	{ .name = "vol_id",    .has_arg = 1, .flag = NULL, .val = 'n' },
+	{ .name = "name",      .has_arg = 1, .flag = NULL, .val = 'N' },
 	{ .name = "all",       .has_arg = 0, .flag = NULL, .val = 'a' },
 	{ .name = "help",      .has_arg = 0, .flag = NULL, .val = 'h' },
 	{ .name = "version",   .has_arg = 0, .flag = NULL, .val = 'V' },
@@ -87,7 +91,7 @@ static int parse_opt(int argc, char * const argv[])
 		int key;
 		char *endp;
 
-		key = getopt_long(argc, argv, "an:d:hV", long_options, NULL);
+		key = getopt_long(argc, argv, "an:N:d:hV", long_options, NULL);
 		if (key == -1)
 			break;
 
@@ -102,6 +106,10 @@ static int parse_opt(int argc, char * const argv[])
 				return errmsg("bad volume ID: " "\"%s\"", optarg);
 			break;
 
+		case 'N':
+			args.vol_name = optarg;
+			break;
+
 		case 'd':
 			args.devn = strtoul(optarg, &endp, 0);
 			if (*endp != '\0' || endp == optarg || args.devn < 0)
@@ -174,6 +182,20 @@ static int translate_dev(libubi_t libubi, const char *node)
 	return 0;
 }
 
+static int get_vol_id_by_name(libubi_t libubi, int dev_num, const char *name)
+{
+	int err;
+	struct ubi_vol_info vol_info;
+
+	err = ubi_get_vol_info1_nm(libubi, dev_num, name, &vol_info);
+	if (err)
+		return sys_errmsg("cannot get information about volume \"%s\" on ubi%d\n", name, dev_num);
+
+	args.vol_id = vol_info.vol_id;
+
+	return 0;
+}
+
 static int print_vol_info(libubi_t libubi, int dev_num, int vol_id)
 {
 	int err;
@@ -377,6 +399,12 @@ int main(int argc, char * const argv[])
 			goto out_libubi;
 	}
 
+	if (args.vol_name) {
+		err = get_vol_id_by_name(libubi, args.devn, args.vol_name);
+		if (err)
+			goto out_libubi;
+	}
+
 	if (args.vol_id != -1 && args.devn == -1) {
 		errmsg("volume ID is specified, but UBI device number is not "
 		       "(use -h for help)\n");