[PATCH/mtd-utils] add a "ubirsvol" tool to resize UBI volume.

[Arnaud Mouiche <arnaud.mouiche@thomson.net>]

This is nearly a copy/paste from ubirmvol

Signed-off-by: Arnaud Mouiche <arnaud.mouiche@thomson.net>
---
 ubi-utils/Makefile       |    2 +-
 ubi-utils/src/ubirsvol.c |  246 
++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 247 insertions(+), 1 deletions(-)
 create mode 100644 ubi-utils/src/ubirsvol.c

diff --git a/ubi-utils/Makefile b/ubi-utils/Makefile
index b5388ec..e736a09 100644
--- a/ubi-utils/Makefile
+++ b/ubi-utils/Makefile
@@ -11,7 +11,7 @@ CPPFLAGS += -Iinclude -Isrc -I$(KERNELHDR)
 
 LIBS = libubi libmtd libubigen libiniparser libscan
 TARGETS = ubiupdatevol ubimkvol ubirmvol ubicrc32 ubinfo ubiattach \
-          ubidetach ubinize ubiformat ubirename mtdinfo
+          ubidetach ubinize ubiformat ubirename mtdinfo ubirsvol
 
 VPATH = src
 
diff --git a/ubi-utils/src/ubirsvol.c b/ubi-utils/src/ubirsvol.c
new file mode 100644
index 0000000..afaa03f
--- /dev/null
+++ b/ubi-utils/src/ubirsvol.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * An utility to resize UBI volumes.
+ *
+ * Authors: Artem Bityutskiy <dedekind@infradead.org>
+ *          Frank Haverkamp <haver@vnet.ibm.com>
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libubi.h>
+#include "common.h"
+
+#define PROGRAM_VERSION "1.1"
+#define PROGRAM_NAME    "ubirsvol"
+
+/* The variables below are set by command line arguments */
+struct args {
+    int vol_id;
+    const char *node;
+    const char *name;
+    long long bytes;
+    int lebs;
+};
+
+static struct args args = {
+    .vol_id = -1,
+    .bytes = -1,
+    .lebs = -1,
+};
+
+static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION
+                 " - a tool to resize UBI volumes.";
+
+static const char *optionsstr =
+"-n, --vol_id=<volume id>   volume ID to resize\n"
+"-N, --name=<volume name>   volume name to resize\n"
+"-s, --size=<bytes>         volume size volume size in bytes, kilobytes 
(KiB)\n"
+"                           or megabytes (MiB)\n"
+"-S, --lebs=<LEBs count>    alternative way to give volume size in 
logical\n"
+"                           eraseblocks\n"
+"-h, -?, --help             print help message\n"
+"-V, --version              print program version";
+
+
+static const char *usage =
+"Usage: " PROGRAM_NAME " <UBI device node file name> [-n <volume id>] 
[--vol_id=<volume id>]\n\n"
+"         [-N <volume name>] [--name=<volume name>] [-s <bytes>] [-S 
<LEBs>] [-h] [--help]\n\n"
+"Example: " PROGRAM_NAME " /dev/ubi0 -n 1 -s 1MiB resize UBI volume 1 
to 1 MiB on\n"
+"         UBI device corresponding to /dev/ubi0\n"
+"         " PROGRAM_NAME " /dev/ubi0 -N my_vol -s 1MiB - resize UBI 
volume named \"my_vol\" to 1 MiB\n"
+"      on UBI device corresponding to /dev/ubi0";
+
+static const struct option long_options[] = {
+    { .name = "vol_id",  .has_arg = 1, .flag = NULL, .val = 'n' },
+    { .name = "name",    .has_arg = 1, .flag = NULL, .val = 'N' },
+    { .name = "help",    .has_arg = 0, .flag = NULL, .val = 'h' },
+    { .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
+    { .name = "size",    .has_arg = 1, .flag = NULL, .val = 's' },
+    { .name = "lebs",    .has_arg = 1, .flag = NULL, .val = 'S' },
+    { NULL, 0, NULL, 0},
+};
+
+static int param_sanity_check(void)
+{
+    if (args.vol_id == -1 && !args.name) {
+        errmsg("please, specify either volume ID or volume name");
+        return -1;
+    }
+
+    if (args.vol_id != -1 && args.name) {
+        errmsg("please, specify either volume ID or volume name, not 
both");
+        return -1;
+    }
+
+    if (args.bytes == -1 && args.lebs == -1)
+        return errmsg("volume size was not specified (use -h for help)");
+
+    if (args.bytes != -1 && args.lebs != -1)
+        return errmsg("size specified with more then one option");
+
+    return 0;
+}
+
+static int parse_opt(int argc, char * const argv[])
+{
+    while (1) {
+        int key;
+        char *endp;
+
+        key = getopt_long(argc, argv, "s:S:n:N:h?V", long_options, NULL);
+        if (key == -1)
+            break;
+
+        switch (key) {
+        case 's':
+            args.bytes = ubiutils_get_bytes(optarg);
+            if (args.bytes <= 0)
+                return errmsg("bad volume size: \"%s\"", optarg);
+            break;
+
+        case 'S':
+            args.lebs = strtoull(optarg, &endp, 0);
+            if (endp == optarg || args.lebs <= 0 || *endp != '\0')
+                return errmsg("bad LEB count: \"%s\"", optarg);
+            break;
+
+        case 'n':
+            args.vol_id = strtoul(optarg, &endp, 0);
+            if (*endp != '\0' || endp == optarg || args.vol_id < 0) {
+                errmsg("bad volume ID: " "\"%s\"", optarg);
+                return -1;
+            }
+            break;
+
+        case 'N':
+            args.name = optarg;
+            break;
+
+        case 'h':
+        case '?':
+            fprintf(stderr, "%s\n\n", doc);
+            fprintf(stderr, "%s\n\n", usage);
+            fprintf(stderr, "%s\n", optionsstr);
+            exit(EXIT_SUCCESS);
+
+        case 'V':
+            fprintf(stderr, "%s\n", PROGRAM_VERSION);
+            exit(EXIT_SUCCESS);
+
+        case ':':
+            errmsg("parameter is missing");
+            return -1;
+
+        default:
+            fprintf(stderr, "Use -h for help\n");
+            return -1;
+        }
+    }
+
+    if (optind == argc) {
+        errmsg("UBI device name was not specified (use -h for help)");
+        return -1;
+    } else if (optind != argc - 1) {
+        errmsg("more then one UBI device specified (use -h for help)");
+        return -1;
+    }
+
+    args.node = argv[optind];
+
+    if (param_sanity_check())
+        return -1;
+
+    return 0;
+}
+
+int main(int argc, char * const argv[])
+{
+    int err;
+    libubi_t libubi;
+    struct ubi_dev_info dev_info;
+    struct ubi_vol_info vol_info;
+
+    err = parse_opt(argc, argv);
+    if (err)
+        return -1;
+
+    libubi = libubi_open();
+    if (!libubi)
+        return sys_errmsg("cannot open libubi");
+
+    err = ubi_probe_node(libubi, args.node);
+    if (err == 2) {
+        errmsg("\"%s\" is an UBI volume node, not an UBI device node",
+               args.node);
+        goto out_libubi;
+    } else if (err < 0) {
+        if (errno == ENODEV)
+            errmsg("\"%s\" is not an UBI device node", args.node);
+        else
+            sys_errmsg("error while probing \"%s\"", args.node);
+    }
+
+    err = ubi_get_dev_info(libubi, args.node, &dev_info);
+    if (err) {
+        sys_errmsg("cannot get information about UBI device \"%s\"",
+               args.node);
+        goto out_libubi;
+    }
+
+    if (args.name) {
+        err = ubi_get_vol_info1_nm(libubi, dev_info.dev_num,
+                       args.name, &vol_info);
+        if (err) {
+            sys_errmsg("cannot find UBI volume \"%s\"", args.name);
+            goto out_libubi;
+        }
+
+        args.vol_id = vol_info.vol_id;
+    } else {
+        err = ubi_get_vol_info1(libubi, dev_info.dev_num,
+                       args.vol_id, &vol_info);
+        if (err) {
+            sys_errmsg("cannot find UBI volume ID %d", args.vol_id);
+            goto out_libubi;
+        }
+    }
+
+    if (args.lebs != -1) {
+        args.bytes = vol_info.leb_size * args.lebs;
+    }
+
+    err = ubi_rsvol(libubi, args.node, args.vol_id, args.bytes);
+    if (err) {
+        sys_errmsg("cannot UBI resize volume");
+        goto out_libubi;
+    }
+
+    libubi_close(libubi);
+    return 0;
+
+out_libubi:
+    libubi_close(libubi);
+    return -1;
+}
-- 
1.5.6.5