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Commit f34f18e0 authored by Daniel Rosenberg's avatar Daniel Rosenberg
Browse files

inspect_cow: Add -o to view Sequence Data 

This allows inspecting sequence op data while viewing cow ops. Data will
be displayed per op.

Test: inspect_cow -o [CowFile]
Change-Id: I0029838ddc265c1aaeba2bbfa70241dea0b8ff20
parent 2ed2f814

fs_mgr/libsnapshot/inspect_cow.cpp

+28 −3
Original line number Diff line number Diff line
@@ -16,8 +16,10 @@ 
#include <stdio.h>

#include <unistd.h>



#include <iomanip>

#include <iostream>

#include <string>

#include <vector>



#include <android-base/logging.h>

#include <android-base/unique_fd.h>
@@ -39,8 +41,9 @@ static void usage(void) { 
    LOG(ERROR) << "Usage: inspect_cow [-sd] <COW_FILE>";

    LOG(ERROR) << "\t -s Run Silent";

    LOG(ERROR) << "\t -d Attempt to decompress";

    LOG(ERROR) << "\t -b Show data for failed decompress\n";

    LOG(ERROR) << "\t -m Show ops in reverse merge order\n";

    LOG(ERROR) << "\t -b Show data for failed decompress";

    LOG(ERROR) << "\t -m Show ops in reverse merge order";

    LOG(ERROR) << "\t -o Shows sequence op block order\n";

}



enum OpIter { Normal, RevMerge };
@@ -49,6 +52,7 @@ struct Options { 
    bool silent;

    bool decompress;

    bool show_bad;

    bool show_seq;

    OpIter iter_type;

};
@@ -148,6 +152,24 @@ static bool Inspect(const std::string& path, Options opt) { 
            sink.Reset();

        }



        if (op.type == kCowSequenceOp && opt.show_seq) {

            size_t read;

            std::vector<uint32_t> merge_op_blocks;

            size_t seq_len = op.data_length / sizeof(uint32_t);

            merge_op_blocks.resize(seq_len);

            if (!reader.GetRawBytes(op.source, merge_op_blocks.data(), op.data_length, &read)) {

                PLOG(ERROR) << "Failed to read sequence op!";

                return false;

            }

            if (!opt.silent) {

                std::cout << "Sequence for " << op << " is :\n";

                for (size_t i = 0; i < seq_len; i++) {

                    std::cout << std::setfill('0') << std::setw(6) << merge_op_blocks[i] << ", ";

                    if ((i + 1) % 10 == 0 || i + 1 == seq_len) std::cout << "\n";

                }

            }

        }



        iter->Next();

    }
@@ -164,7 +186,7 @@ int main(int argc, char** argv) { 
    opt.decompress = false;

    opt.show_bad = false;

    opt.iter_type = android::snapshot::Normal;

    while ((ch = getopt(argc, argv, "sdbm")) != -1) {

    while ((ch = getopt(argc, argv, "sdbmo")) != -1) {

        switch (ch) {

            case 's':

                opt.silent = true;
@@ -178,6 +200,9 @@ int main(int argc, char** argv) { 
            case 'm':

                opt.iter_type = android::snapshot::RevMerge;

                break;

            case 'o':

                opt.show_seq = true;

                break;

            default:

                android::snapshot::usage();

        }