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Commit 31009d55 authored by Devin Moore's avatar Devin Moore Committed by Automerger Merge Worker
Browse files

Merge "fastboot: make copy_boot_avb_footer more generic" am: f56e0dbf 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1941095

Change-Id: Iabf4f4201f7156ec9c192f9566a767be84432812
parents 47d6a849 f56e0dbf

fastboot/fastboot.cpp

+10 −9
Original line number Diff line number Diff line
@@ -1025,7 +1025,7 @@ static uint64_t get_partition_size(const std::string& partition) { 
    return partition_size;

}



static void copy_boot_avb_footer(const std::string& partition, struct fastboot_buffer* buf) {

static void copy_avb_footer(const std::string& partition, struct fastboot_buffer* buf) {

    if (buf->sz < AVB_FOOTER_SIZE) {

        return;

    }
@@ -1040,9 +1040,9 @@ static void copy_boot_avb_footer(const std::string& partition, struct fastboot_b 
    // In this case, partition_size will be zero.

    if (partition_size < buf->sz) {

        fprintf(stderr,

                "Warning: skip copying boot image avb footer"

                " (boot partition size: %" PRId64 ", boot image size: %" PRId64 ").\n",

                partition_size, buf->sz);

                "Warning: skip copying %s image avb footer"

                " (%s partition size: %" PRId64 ", %s image size: %" PRId64 ").\n",

                partition.c_str(), partition.c_str(), partition_size, partition.c_str(), buf->sz);

        return;

    }
@@ -1050,7 +1050,7 @@ static void copy_boot_avb_footer(const std::string& partition, struct fastboot_b 
    // Because buf->fd will still be used afterwards.

    std::string data;

    if (!android::base::ReadFdToString(buf->fd, &data)) {

        die("Failed reading from boot");

        die("Failed reading from %s", partition.c_str());

    }



    uint64_t footer_offset = buf->sz - AVB_FOOTER_SIZE;
@@ -1059,13 +1059,14 @@ static void copy_boot_avb_footer(const std::string& partition, struct fastboot_b 
        return;

    }



    unique_fd fd(make_temporary_fd("boot rewriting"));

    const std::string tmp_fd_template = partition + " rewriting";

    unique_fd fd(make_temporary_fd(tmp_fd_template.c_str()));

    if (!android::base::WriteStringToFd(data, fd)) {

        die("Failed writing to modified boot");

        die("Failed writing to modified %s", partition.c_str());

    }

    lseek(fd.get(), partition_size - AVB_FOOTER_SIZE, SEEK_SET);

    if (!android::base::WriteStringToFd(data.substr(footer_offset), fd)) {

        die("Failed copying AVB footer in boot");

        die("Failed copying AVB footer in %s", partition.c_str());

    }

    buf->fd = std::move(fd);

    buf->sz = partition_size;
@@ -1078,7 +1079,7 @@ static void flash_buf(const std::string& partition, struct fastboot_buffer *buf) 


    if (partition == "boot" || partition == "boot_a" || partition == "boot_b" ||

        partition == "init_boot" || partition == "init_boot_a" || partition == "init_boot_b") {

        copy_boot_avb_footer(partition, buf);

        copy_avb_footer(partition, buf);

    }



    // Rewrite vbmeta if that's what we're flashing and modification has been requested.