X-Git-Url: https://git.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fext.cc;fp=src%2Flib%2Fext.cc;h=4aa8af5e87f30ec02d72065e971ec7315a9d288f;hp=0000000000000000000000000000000000000000;hb=d4f0bd6523854be0e03b6b14d00d8def3c1ce384;hpb=57457b8595d5d3e7f028686bd624ec74dde0b034 diff --git a/src/lib/ext.cc b/src/lib/ext.cc new file mode 100644 index 000000000..4aa8af5e8 --- /dev/null +++ b/src/lib/ext.cc @@ -0,0 +1,393 @@ +/* + Copyright (C) 2019-2020 Carl Hetherington + + This file is part of DCP-o-matic. + + DCP-o-matic 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. + + DCP-o-matic 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 DCP-o-matic. If not, see . + +*/ + + +#include "compose.hpp" +#include "cross.h" +#include "dcpomatic_log.h" +#include "digester.h" +#include "disk_writer_messages.h" +#include "exceptions.h" +#include "ext.h" +#include "nanomsg.h" + +#ifdef DCPOMATIC_LINUX +#include +#include +extern "C" { +#include +} +#endif + +#ifdef DCPOMATIC_OSX +extern "C" { +#include +} +#endif + +#ifdef DCPOMATIC_WINDOWS +extern "C" { +#include +} +#endif + +extern "C" { +#include +#include +#include +#include +#include +#include +} +#include +#include +#include + + +using std::exception; +using std::min; +using std::string; +using std::vector; + + +#define SHORT_TIMEOUT 100 +#define LONG_TIMEOUT 2000 + + +/* Use quite a big block size here, as ext4's fwrite() has quite a bit of overhead */ +static uint64_t const block_size = 4096 * 4096; + + +static +void +count (boost::filesystem::path dir, uint64_t& total_bytes) +{ + using namespace boost::filesystem; + for (directory_iterator i = directory_iterator(dir); i != directory_iterator(); ++i) { + if (is_directory(*i)) { + count (*i, total_bytes); + } else { + total_bytes += file_size (*i); + } + } +} + +static +string +write (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_remaining, uint64_t total, Nanomsg* nanomsg) +{ + ext4_file out; + int r = ext4_fopen(&out, to.generic_string().c_str(), "wb"); + if (r != EOK) { + throw CopyError (String::compose("Failed to open file %1", to.generic_string()), r); + } + + FILE* in = fopen_boost (from, "rb"); + if (!in) { + ext4_fclose (&out); + throw CopyError (String::compose("Failed to open file %1", from.string()), 0); + } + + uint8_t* buffer = new uint8_t[block_size]; + Digester digester; + + int progress_frequency = 1; + int progress_count = 0; + uint64_t remaining = file_size (from); + while (remaining > 0) { + uint64_t const this_time = min(remaining, block_size); + size_t read = fread (buffer, 1, this_time, in); + if (read != this_time) { + fclose (in); + ext4_fclose (&out); + delete[] buffer; + throw CopyError (String::compose("Short read; expected %1 but read %2", this_time, read), 0); + } + + digester.add (buffer, this_time); + + size_t written; + r = ext4_fwrite (&out, buffer, this_time, &written); + if (r != EOK) { + fclose (in); + ext4_fclose (&out); + delete[] buffer; + throw CopyError ("Write failed", r); + } + if (written != this_time) { + fclose (in); + ext4_fclose (&out); + delete[] buffer; + throw CopyError (String::compose("Short write; expected %1 but wrote %2", this_time, written), 0); + } + remaining -= this_time; + total_remaining -= this_time; + + ++progress_count; + if ((progress_count % progress_frequency) == 0) { + nanomsg->send(String::compose(DISK_WRITER_COPY_PROGRESS "\n%1\n", (1 - float(total_remaining) / total)), SHORT_TIMEOUT); + } + } + + fclose (in); + ext4_fclose (&out); + delete[] buffer; + + return digester.get (); +} + + +static +string +read (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_remaining, uint64_t total, Nanomsg* nanomsg) +{ + ext4_file in; + LOG_DISK("Opening %1 for read", to.generic_string()); + int r = ext4_fopen(&in, to.generic_string().c_str(), "rb"); + if (r != EOK) { + throw VerifyError (String::compose("Failed to open file %1", to.generic_string()), r); + } + LOG_DISK("Opened %1 for read", to.generic_string()); + + uint8_t* buffer = new uint8_t[block_size]; + Digester digester; + + uint64_t remaining = file_size (from); + while (remaining > 0) { + uint64_t const this_time = min(remaining, block_size); + size_t read; + r = ext4_fread (&in, buffer, this_time, &read); + if (read != this_time) { + ext4_fclose (&in); + delete[] buffer; + throw VerifyError (String::compose("Short read; expected %1 but read %2", this_time, read), 0); + } + + digester.add (buffer, this_time); + remaining -= this_time; + total_remaining -= this_time; + nanomsg->send(String::compose(DISK_WRITER_VERIFY_PROGRESS "\n%1\n", (1 - float(total_remaining) / total)), SHORT_TIMEOUT); + } + + ext4_fclose (&in); + delete[] buffer; + + return digester.get (); +} + + +class CopiedFile +{ +public: + CopiedFile (boost::filesystem::path from_, boost::filesystem::path to_, string write_digest_) + : from (from_) + , to (to_) + , write_digest (write_digest_) + {} + + boost::filesystem::path from; + boost::filesystem::path to; + /** digest calculated from data as it was read from the source during write */ + string write_digest; +}; + + +/** @param from File to copy from. + * @param to Directory to copy to. + */ +static +void +copy (boost::filesystem::path from, boost::filesystem::path to, uint64_t& total_remaining, uint64_t total, vector& copied_files, Nanomsg* nanomsg) +{ + LOG_DISK ("Copy %1 -> %2", from.string(), to.generic_string()); + + using namespace boost::filesystem; + + path const cr = to / from.filename(); + + if (is_directory(from)) { + int r = ext4_dir_mk (cr.generic_string().c_str()); + if (r != EOK) { + throw CopyError (String::compose("Failed to create directory %1", cr.generic_string()), r); + } + + for (directory_iterator i = directory_iterator(from); i != directory_iterator(); ++i) { + copy (i->path(), cr, total_remaining, total, copied_files, nanomsg); + } + } else { + string const write_digest = write (from, cr, total_remaining, total, nanomsg); + LOG_DISK ("Wrote %1 %2 with %3", from.string(), cr.generic_string(), write_digest); + copied_files.push_back (CopiedFile(from, cr, write_digest)); + } +} + + +static +void +verify (vector const& copied_files, uint64_t total, Nanomsg* nanomsg) +{ + uint64_t total_remaining = total; + BOOST_FOREACH (CopiedFile const& i, copied_files) { + string const read_digest = read (i.from, i.to, total_remaining, total, nanomsg); + LOG_DISK ("Read %1 %2 was %3 on write, now %4", i.from.string(), i.to.generic_string(), i.write_digest, read_digest); + if (read_digest != i.write_digest) { + throw VerifyError ("Hash of written data is incorrect", 0); + } + } +} + + +void +#ifdef DCPOMATIC_WINDOWS +dcpomatic::write (boost::filesystem::path dcp_path, string device, string, Nanomsg* nanomsg) +#else +dcpomatic::write (boost::filesystem::path dcp_path, string device, string posix_partition, Nanomsg* nanomsg) +#endif +try +{ + ext4_dmask_set (DEBUG_ALL); + + /* We rely on static initialization for these */ + static struct ext4_fs fs; + static struct ext4_mkfs_info info; + info.block_size = 4096; + info.inode_size = 128; + info.journal = false; + +#ifdef WIN32 + file_windows_name_set(device.c_str()); + struct ext4_blockdev* bd = file_windows_dev_get(); +#else + file_dev_name_set (device.c_str()); + struct ext4_blockdev* bd = file_dev_get (); +#endif + + if (!bd) { + throw CopyError ("Failed to open drive", 0); + } + LOG_DISK_NC ("Opened drive"); + + struct ext4_mbr_parts parts; + parts.division[0] = 100; + parts.division[1] = 0; + parts.division[2] = 0; + parts.division[3] = 0; + +#ifdef DCPOMATIC_LINUX + PrivilegeEscalator e; +#endif + + /* XXX: not sure if disk_id matters */ + int r = ext4_mbr_write (bd, &parts, 0); + if (r) { + throw CopyError ("Failed to write MBR", r); + } + LOG_DISK_NC ("Wrote MBR"); + + struct ext4_mbr_bdevs bdevs; + r = ext4_mbr_scan (bd, &bdevs); + if (r != EOK) { + throw CopyError ("Failed to read MBR", r); + } + +#ifdef DCPOMATIC_LINUX + /* Re-read the partition table */ + int fd = open(device.c_str(), O_RDONLY); + ioctl(fd, BLKRRPART, NULL); + close(fd); +#endif + + LOG_DISK ("Writing to partition at %1 size %2; bd part size is %3", bdevs.partitions[0].part_offset, bdevs.partitions[0].part_size, bd->part_size); + +#ifdef DCPOMATIC_WINDOWS + file_windows_partition_set (bdevs.partitions[0].part_offset, bdevs.partitions[0].part_size); +#else + file_dev_name_set (posix_partition.c_str()); + bd = file_dev_get (); +#endif + + if (!bd) { + throw CopyError ("Failed to open partition", 0); + } + LOG_DISK_NC ("Opened partition"); + + nanomsg->send(DISK_WRITER_FORMATTING "\n", SHORT_TIMEOUT); + + r = ext4_mkfs(&fs, bd, &info, F_SET_EXT2); + if (r != EOK) { + throw CopyError ("Failed to make filesystem", r); + } + LOG_DISK_NC ("Made filesystem"); + + r = ext4_device_register(bd, "ext4_fs"); + if (r != EOK) { + throw CopyError ("Failed to register device", r); + } + LOG_DISK_NC ("Registered device"); + + r = ext4_mount("ext4_fs", "/mp/", false); + if (r != EOK) { + throw CopyError ("Failed to mount device", r); + } + LOG_DISK_NC ("Mounted device"); + + uint64_t total_bytes = 0; + count (dcp_path, total_bytes); + + uint64_t total_remaining = total_bytes; + vector copied_files; + copy (dcp_path, "/mp", total_remaining, total_bytes, copied_files, nanomsg); + + /* Unmount and re-mount to make sure the write has finished */ + r = ext4_umount("/mp/"); + if (r != EOK) { + throw CopyError ("Failed to unmount device", r); + } + r = ext4_mount("ext4_fs", "/mp/", false); + if (r != EOK) { + throw CopyError ("Failed to mount device", r); + } + LOG_DISK_NC ("Re-mounted device"); + + verify (copied_files, total_bytes, nanomsg); + + r = ext4_umount("/mp/"); + if (r != EOK) { + throw CopyError ("Failed to unmount device", r); + } + + ext4_device_unregister("ext4_fs"); + if (!nanomsg->send(DISK_WRITER_OK "\n", LONG_TIMEOUT)) { + throw CommunicationFailedError (); + } + + disk_write_finished (); +} catch (CopyError& e) { + LOG_DISK("CopyError (from write): %1 %2", e.message(), e.number().get_value_or(0)); + nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n%2\n", e.message(), e.number().get_value_or(0)), LONG_TIMEOUT); +} catch (VerifyError& e) { + LOG_DISK("VerifyError (from write): %1 %2", e.message(), e.number()); + nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n%2\n", e.message(), e.number()), LONG_TIMEOUT); +} catch (exception& e) { + LOG_DISK("Exception (from write): %1", e.what()); + nanomsg->send(String::compose(DISK_WRITER_ERROR "\n%1\n0\n", e.what()), LONG_TIMEOUT); +} + +