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Posted to commits@nuttx.apache.org by je...@apache.org on 2021/10/28 06:54:37 UTC
[incubator-nuttx-apps] 01/02: fsutils/mkmbr: support mbr partition
format
This is an automated email from the ASF dual-hosted git repository.
jerpelea pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx-apps.git
commit aaf6f5c4cbdf83901267b9a797353be17bbe26e1
Author: Jiuzhu Dong <do...@xiaomi.com>
AuthorDate: Fri Sep 24 22:11:12 2021 +0800
fsutils/mkmbr: support mbr partition format
Signed-off-by: Jiuzhu Dong <do...@xiaomi.com>
---
fsutils/mkmbr/Kconfig | 11 +++
fsutils/mkmbr/Make.defs | 23 ++++++
fsutils/mkmbr/Makefile | 32 +++++++++
fsutils/mkmbr/mkmbr.c | 188 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 254 insertions(+)
diff --git a/fsutils/mkmbr/Kconfig b/fsutils/mkmbr/Kconfig
new file mode 100644
index 0000000..7a84030
--- /dev/null
+++ b/fsutils/mkmbr/Kconfig
@@ -0,0 +1,11 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config FSUTILS_MKMBR
+ bool "mkmbr utility"
+ default n
+ select BCH
+ ---help---
+ Enables support for the mkmbr utility
diff --git a/fsutils/mkmbr/Make.defs b/fsutils/mkmbr/Make.defs
new file mode 100644
index 0000000..89de722
--- /dev/null
+++ b/fsutils/mkmbr/Make.defs
@@ -0,0 +1,23 @@
+############################################################################
+# apps/fsutils/mkmbr/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_FSUTILS_MKMBR),)
+CONFIGURED_APPS += $(APPDIR)/fsutils/mkmbr
+endif
diff --git a/fsutils/mkmbr/Makefile b/fsutils/mkmbr/Makefile
new file mode 100644
index 0000000..96abeff
--- /dev/null
+++ b/fsutils/mkmbr/Makefile
@@ -0,0 +1,32 @@
+############################################################################
+# apps/fsutils/mkmbr/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+# mkmbr built-in application info
+
+PROGNAME = mkmbr
+PRIORITY = 100
+STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
+MODULE = $(CONFIG_FSUTILS_MKMBR)
+
+MAINSRC = mkmbr.c
+
+include $(APPDIR)/Application.mk
diff --git a/fsutils/mkmbr/mkmbr.c b/fsutils/mkmbr/mkmbr.c
new file mode 100644
index 0000000..9c02512
--- /dev/null
+++ b/fsutils/mkmbr/mkmbr.c
@@ -0,0 +1,188 @@
+/****************************************************************************
+ * apps/fsutils/mkmbr/mkmbr.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <endian.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef FAR
+#define FAR
+#endif
+
+#define PACKED __attribute__((packed))
+#define PARTITION_BOOTABLE_FLAG 0x80
+#define PARTITION_TYPE 0x83 /* GNU/Linux */
+#define MBR_BOOT_SIGNATURE 0xAA55
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct PACKED partition_s
+{
+ uint8_t bootable_flag;
+ uint8_t first_sector_chs[3];
+ uint8_t type;
+ uint8_t last_sector_chs[3];
+ uint32_t first_sector_lba;
+ uint32_t sectors_num_lba;
+};
+
+struct PACKED mbr_s
+{
+ uint8_t bootstrap[446];
+ struct partition_s partitions[4];
+ uint16_t boot_signature;
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const char g_usage[] = "\
+Usage: \n\
+\n\
+ mkmbr dev p1_start p1_sectors [p2_start p2_sectors [...]]\n\
+\n\
+Where:\n\
+ dev - block device path\n\
+ pX_start - first sector number or \"auto\" to use next free sector\n\
+ pX_sectors - partition's sectors count or \"auto\" to use all free space\n\
+\n";
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void print_usage(void)
+{
+ write(STDERR_FILENO, g_usage, sizeof(g_usage));
+}
+
+static void mbr_init(FAR struct mbr_s *mbr)
+{
+ memset(mbr, 0, sizeof(struct mbr_s));
+ mbr->boot_signature = MBR_BOOT_SIGNATURE;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int main(int argc, FAR char *argv[])
+{
+ unsigned long bsize;
+ unsigned long start;
+ unsigned long size;
+ unsigned long next;
+ struct mbr_s mbr;
+ struct stat st;
+ int partn;
+ int argn;
+ int fd;
+ int ret;
+
+ if (argc < 4 || argc % 2 != 0)
+ {
+ print_usage();
+ return EINVAL;
+ }
+
+ fd = open(argv[1], O_RDWR);
+ if (fd < 0)
+ {
+ return errno;
+ }
+
+ ret = fstat(fd, &st);
+ if (ret < 0)
+ {
+ goto err_exit;
+ }
+
+ next = 1;
+ bsize = st.st_size / 512;
+ mbr_init(&mbr);
+ for (partn = 0; partn < 4 && next < bsize; partn++)
+ {
+ argn = 2 * (partn + 1);
+ if (!strcmp(argv[argn], "auto"))
+ {
+ start = next;
+ }
+ else
+ {
+ errno = 0;
+ start = strtoul(argv[argn], NULL, 0);
+ if (errno)
+ {
+ goto err_exit;
+ }
+ }
+
+ if (!strcmp(argv[argn + 1], "auto"))
+ {
+ size = bsize - start;
+ }
+ else
+ {
+ errno = 0;
+ size = strtoul(argv[argn + 1], NULL, 0);
+ if (errno)
+ {
+ goto err_exit;
+ }
+ }
+
+ if (start < next || start + size > bsize)
+ {
+ errno = EINVAL;
+ goto err_exit;
+ }
+
+ mbr.partitions[partn].first_sector_lba = htole32(start);
+ mbr.partitions[partn].sectors_num_lba = htole32(size);
+ mbr.partitions[partn].type = PARTITION_TYPE;
+ next = start + size;
+ }
+
+ ret = write(fd, &mbr, sizeof(mbr));
+ if (ret >= 0)
+ {
+ errno = 0;
+ }
+
+err_exit:
+ close(fd);
+ return errno;
+}