fastbootd: erase, boot and partitioning commands
Change-Id: I49ba2ba2e002fd5b6bbd37cc3fd0caa106f42010
diff --git a/fastbootd/commands/flash.c b/fastbootd/commands/flash.c
new file mode 100644
index 0000000..5f8b931
--- /dev/null
+++ b/fastbootd/commands/flash.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2009-2013, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google, Inc. nor the names of its contributors
+ * may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#include "flash.h"
+#include "protocol.h"
+#include "debug.h"
+#include "utils.h"
+#include "commands/partitions.h"
+
+
+#define ALLOWED_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-."
+#define BUFFER_SIZE 1024 * 1024
+#define MIN(a, b) (a > b ? b : a)
+
+
+int flash_find_entry(const char *name, char *out, size_t outlen)
+{
+//TODO: Assumption: All the partitions has they unique name
+
+ const char *path = fastboot_getvar("device-directory");
+ size_t length;
+ if (strcmp(path, "") == 0) {
+ D(ERR, "device-directory: not defined in config file");
+ return -1;
+ }
+
+ length = strspn(name, ALLOWED_CHARS);
+ if (length != strlen(name)) {
+ D(ERR, "Not allowed char in name: %c", name[length]);
+ return -1;
+ }
+
+ if (snprintf(out, outlen, "%s%s", path, name) >= (int) outlen) {
+ D(ERR, "Too long path to partition file");
+ return -1;
+ }
+
+ if (access(out, F_OK ) == -1) {
+ D(ERR, "could not find partition file %s", name);
+ return -1;
+ }
+
+ return 0;
+}
+
+int flash_erase(int fd)
+{
+ int64_t size;
+ size = get_block_device_size(fd);
+ D(DEBUG, "erase %llu data from %d\n", size, fd);
+
+ return wipe_block_device(fd, size);
+}
+
+int flash_write(int partition_fd, int data_fd, ssize_t size, ssize_t skip)
+{
+ ssize_t written = 0;
+ struct GPT_mapping input;
+ struct GPT_mapping output;
+
+ while (written < size) {
+ int current_size = MIN(size - written, BUFFER_SIZE);
+
+ if (gpt_mmap(&input, written + skip, current_size, data_fd)) {
+ D(ERR, "Error in writing data, unable to map data file %d at %d size %d", size, skip, current_size);
+ return -1;
+ }
+ if (gpt_mmap(&output, written, current_size, partition_fd)) {
+ D(ERR, "Error in writing data, unable to map output partition");
+ return -1;
+ }
+
+ memcpy(output.ptr, input.ptr, current_size);
+
+ gpt_unmap(&input);
+ gpt_unmap(&output);
+
+ written += current_size;
+ }
+
+ return 0;
+}