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transmission/libtransmission/resume.cc

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/*
* This file Copyright (C) 2008-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <algorithm>
#include <cstring>
#include <string_view>
#include <vector>
#include "transmission.h"
#include "completion.h"
#include "error.h"
#include "file.h"
#include "log.h"
#include "metainfo.h" /* tr_metainfoGetBasename() */
#include "peer-mgr.h" /* pex */
#include "platform.h" /* tr_getResumeDir() */
#include "resume.h"
#include "session.h"
#include "torrent.h"
#include "tr-assert.h"
#include "utils.h"
#include "variant.h"
using namespace std::literals;
namespace
{
constexpr int MAX_REMEMBERED_PEERS = 200;
} // unnamed namespace
static char* getResumeFilename(tr_torrent const* tor, enum tr_metainfo_basename_format format)
{
char* base = tr_metainfoGetBasename(tr_torrentInfo(tor), format);
char* filename = tr_strdup_printf("%s" TR_PATH_DELIMITER_STR "%s.resume", tr_getResumeDir(tor->session), base);
tr_free(base);
return filename;
}
/***
****
***/
static void savePeers(tr_variant* dict, tr_torrent const* tor)
{
tr_pex* pex = nullptr;
int count = tr_peerMgrGetPeers(tor, &pex, TR_AF_INET, TR_PEERS_INTERESTING, MAX_REMEMBERED_PEERS);
if (count > 0)
{
tr_variantDictAddRaw(dict, TR_KEY_peers2, pex, sizeof(tr_pex) * count);
}
tr_free(pex);
count = tr_peerMgrGetPeers(tor, &pex, TR_AF_INET6, TR_PEERS_INTERESTING, MAX_REMEMBERED_PEERS);
if (count > 0)
{
tr_variantDictAddRaw(dict, TR_KEY_peers2_6, pex, sizeof(tr_pex) * count);
}
tr_free(pex);
}
static size_t addPeers(tr_torrent* tor, uint8_t const* buf, size_t buflen)
{
size_t const n_in = buflen / sizeof(tr_pex);
size_t const n_pex = std::min(n_in, size_t{ MAX_REMEMBERED_PEERS });
tr_pex pex[MAX_REMEMBERED_PEERS];
memcpy(pex, buf, sizeof(tr_pex) * n_pex);
return tr_peerMgrAddPex(tor, TR_PEER_FROM_RESUME, pex, n_pex);
}
static uint64_t loadPeers(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
uint8_t const* str = nullptr;
auto len = size_t{};
if (tr_variantDictFindRaw(dict, TR_KEY_peers2, &str, &len))
{
size_t const numAdded = addPeers(tor, str, len);
tr_logAddTorDbg(tor, "Loaded %zu IPv4 peers from resume file", numAdded);
ret = TR_FR_PEERS;
}
if (tr_variantDictFindRaw(dict, TR_KEY_peers2_6, &str, &len))
{
size_t const numAdded = addPeers(tor, str, len);
tr_logAddTorDbg(tor, "Loaded %zu IPv6 peers from resume file", numAdded);
ret = TR_FR_PEERS;
}
return ret;
}
/***
****
***/
static void saveLabels(tr_variant* dict, tr_torrent const* tor)
{
auto const& labels = tor->labels;
tr_variant* list = tr_variantDictAddList(dict, TR_KEY_labels, std::size(labels));
for (auto const& label : labels)
{
tr_variantListAddStr(list, label);
}
}
static uint64_t loadLabels(tr_variant* dict, tr_torrent* tor)
{
tr_variant* list = nullptr;
if (!tr_variantDictFindList(dict, TR_KEY_labels, &list))
{
return 0;
}
int const n = tr_variantListSize(list);
for (int i = 0; i < n; ++i)
{
auto sv = std::string_view{};
if (tr_variantGetStrView(tr_variantListChild(list, i), &sv) && !std::empty(sv))
{
tor->labels.emplace(sv);
}
}
return TR_FR_LABELS;
}
/***
****
***/
static void saveDND(tr_variant* dict, tr_torrent const* tor)
{
tr_info const* const inf = tr_torrentInfo(tor);
tr_file_index_t const n = inf->fileCount;
tr_variant* const list = tr_variantDictAddList(dict, TR_KEY_dnd, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddBool(list, inf->files[i].dnd);
}
}
static uint64_t loadDND(tr_variant* dict, tr_torrent* tor)
{
uint64_t ret = 0;
tr_variant* list = nullptr;
tr_file_index_t const n = tor->info.fileCount;
if (tr_variantDictFindList(dict, TR_KEY_dnd, &list) && tr_variantListSize(list) == n)
{
tr_file_index_t* dl = tr_new(tr_file_index_t, n);
tr_file_index_t* dnd = tr_new(tr_file_index_t, n);
tr_file_index_t dlCount = 0;
tr_file_index_t dndCount = 0;
for (tr_file_index_t i = 0; i < n; ++i)
{
auto tmp = false;
if (tr_variantGetBool(tr_variantListChild(list, i), &tmp) && tmp)
{
dnd[dndCount++] = i;
}
else
{
dl[dlCount++] = i;
}
}
if (dndCount != 0)
{
tr_torrentInitFileDLs(tor, dnd, dndCount, false);
tr_logAddTorDbg(tor, "Resume file found %d files listed as dnd", dndCount);
}
if (dlCount != 0)
{
tr_torrentInitFileDLs(tor, dl, dlCount, true);
tr_logAddTorDbg(tor, "Resume file found %d files marked for download", dlCount);
}
tr_free(dnd);
tr_free(dl);
ret = TR_FR_DND;
}
else
{
tr_logAddTorDbg(
tor,
"Couldn't load DND flags. DND list (%p) has %zu"
" children; torrent has %d files",
(void*)list,
tr_variantListSize(list),
(int)n);
}
return ret;
}
/***
****
***/
static void saveFilePriorities(tr_variant* dict, tr_torrent const* tor)
{
tr_info const* const inf = tr_torrentInfo(tor);
tr_file_index_t const n = inf->fileCount;
tr_variant* const list = tr_variantDictAddList(dict, TR_KEY_priority, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddInt(list, inf->files[i].priority);
}
}
static uint64_t loadFilePriorities(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
tr_file_index_t const n = tor->info.fileCount;
tr_variant* list = nullptr;
if (tr_variantDictFindList(dict, TR_KEY_priority, &list) && tr_variantListSize(list) == n)
{
for (tr_file_index_t i = 0; i < n; ++i)
{
auto priority = int64_t{};
if (tr_variantGetInt(tr_variantListChild(list, i), &priority))
{
tr_torrentInitFilePriority(tor, i, priority);
}
}
ret = TR_FR_FILE_PRIORITIES;
}
return ret;
}
/***
****
***/
static void saveSingleSpeedLimit(tr_variant* d, tr_torrent* tor, tr_direction dir)
{
tr_variantDictReserve(d, 3);
tr_variantDictAddInt(d, TR_KEY_speed_Bps, tr_torrentGetSpeedLimit_Bps(tor, dir));
tr_variantDictAddBool(d, TR_KEY_use_global_speed_limit, tr_torrentUsesSessionLimits(tor));
tr_variantDictAddBool(d, TR_KEY_use_speed_limit, tr_torrentUsesSpeedLimit(tor, dir));
}
static void saveSpeedLimits(tr_variant* dict, tr_torrent* tor)
{
saveSingleSpeedLimit(tr_variantDictAddDict(dict, TR_KEY_speed_limit_down, 0), tor, TR_DOWN);
saveSingleSpeedLimit(tr_variantDictAddDict(dict, TR_KEY_speed_limit_up, 0), tor, TR_UP);
}
static void saveRatioLimits(tr_variant* dict, tr_torrent* tor)
{
tr_variant* d = tr_variantDictAddDict(dict, TR_KEY_ratio_limit, 2);
tr_variantDictAddReal(d, TR_KEY_ratio_limit, tr_torrentGetRatioLimit(tor));
tr_variantDictAddInt(d, TR_KEY_ratio_mode, tr_torrentGetRatioMode(tor));
}
static void saveIdleLimits(tr_variant* dict, tr_torrent* tor)
{
tr_variant* d = tr_variantDictAddDict(dict, TR_KEY_idle_limit, 2);
tr_variantDictAddInt(d, TR_KEY_idle_limit, tr_torrentGetIdleLimit(tor));
tr_variantDictAddInt(d, TR_KEY_idle_mode, tr_torrentGetIdleMode(tor));
}
static void loadSingleSpeedLimit(tr_variant* d, tr_direction dir, tr_torrent* tor)
{
auto i = int64_t{};
auto boolVal = false;
if (tr_variantDictFindInt(d, TR_KEY_speed_Bps, &i))
{
tr_torrentSetSpeedLimit_Bps(tor, dir, i);
}
else if (tr_variantDictFindInt(d, TR_KEY_speed, &i))
{
tr_torrentSetSpeedLimit_Bps(tor, dir, i * 1024);
}
if (tr_variantDictFindBool(d, TR_KEY_use_speed_limit, &boolVal))
{
tr_torrentUseSpeedLimit(tor, dir, boolVal);
}
if (tr_variantDictFindBool(d, TR_KEY_use_global_speed_limit, &boolVal))
{
tr_torrentUseSessionLimits(tor, boolVal);
}
}
static uint64_t loadSpeedLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
tr_variant* d = nullptr;
if (tr_variantDictFindDict(dict, TR_KEY_speed_limit_up, &d))
{
loadSingleSpeedLimit(d, TR_UP, tor);
ret = TR_FR_SPEEDLIMIT;
}
if (tr_variantDictFindDict(dict, TR_KEY_speed_limit_down, &d))
{
loadSingleSpeedLimit(d, TR_DOWN, tor);
ret = TR_FR_SPEEDLIMIT;
}
return ret;
}
static uint64_t loadRatioLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
tr_variant* d = nullptr;
if (tr_variantDictFindDict(dict, TR_KEY_ratio_limit, &d))
{
auto dratio = double{};
if (tr_variantDictFindReal(d, TR_KEY_ratio_limit, &dratio))
{
tr_torrentSetRatioLimit(tor, dratio);
}
auto i = int64_t{};
if (tr_variantDictFindInt(d, TR_KEY_ratio_mode, &i))
{
tr_torrentSetRatioMode(tor, tr_ratiolimit(i));
}
ret = TR_FR_RATIOLIMIT;
}
return ret;
}
static uint64_t loadIdleLimits(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
tr_variant* d = nullptr;
if (tr_variantDictFindDict(dict, TR_KEY_idle_limit, &d))
{
auto imin = int64_t{};
if (tr_variantDictFindInt(d, TR_KEY_idle_limit, &imin))
{
tr_torrentSetIdleLimit(tor, imin);
}
auto i = int64_t{};
if (tr_variantDictFindInt(d, TR_KEY_idle_mode, &i))
{
tr_torrentSetIdleMode(tor, tr_idlelimit(i));
}
ret = TR_FR_IDLELIMIT;
}
return ret;
}
/***
****
***/
static void saveName(tr_variant* dict, tr_torrent const* tor)
{
tr_variantDictAddStrView(dict, TR_KEY_name, tr_torrentName(tor));
}
static uint64_t loadName(tr_variant* dict, tr_torrent* tor)
{
auto name = std::string_view{};
if (!tr_variantDictFindStrView(dict, TR_KEY_name, &name))
{
return 0;
}
if (name != tr_torrentName(tor))
{
tr_free(tor->info.name);
tor->info.name = tr_strvDup(name);
}
return TR_FR_NAME;
}
/***
****
***/
static void saveFilenames(tr_variant* dict, tr_torrent const* tor)
{
tr_file_index_t const n = tor->info.fileCount;
tr_file const* files = tor->info.files;
bool any_renamed = false;
for (tr_file_index_t i = 0; !any_renamed && i < n; ++i)
{
any_renamed = files[i].is_renamed;
}
if (any_renamed)
{
tr_variant* list = tr_variantDictAddList(dict, TR_KEY_files, n);
for (tr_file_index_t i = 0; i < n; ++i)
{
tr_variantListAddStrView(list, files[i].is_renamed ? files[i].name : "");
}
}
}
static uint64_t loadFilenames(tr_variant* dict, tr_torrent* tor)
{
tr_variant* list = nullptr;
if (!tr_variantDictFindList(dict, TR_KEY_files, &list))
{
return 0;
}
size_t const n = tr_variantListSize(list);
tr_file* files = tor->info.files;
for (size_t i = 0; i < tor->info.fileCount && i < n; ++i)
{
auto sv = std::string_view{};
if (tr_variantGetStrView(tr_variantListChild(list, i), &sv) && !std::empty(sv))
{
tr_free(files[i].name);
files[i].name = tr_strvDup(sv);
files[i].is_renamed = true;
}
}
return TR_FR_FILENAMES;
}
/***
****
***/
static void bitfieldToRaw(tr_bitfield const* b, tr_variant* benc)
{
if (b->hasNone() || std::size(*b) == 0)
{
tr_variantInitStr(benc, "none"sv);
}
else if (b->hasAll())
{
tr_variantInitStrView(benc, "all"sv);
}
else
{
auto const raw = b->raw();
tr_variantInitRaw(benc, raw.data(), std::size(raw));
}
}
static void rawToBitfield(tr_bitfield& bitfield, uint8_t const* raw, size_t rawlen)
{
if (raw == nullptr || rawlen == 0 || (rawlen == 4 && memcmp(raw, "none", 4) == 0))
{
bitfield.setHasNone();
}
else if (rawlen == 3 && memcmp(raw, "all", 3) == 0)
{
bitfield.setHasAll();
}
else
{
bitfield.setRaw(raw, rawlen);
}
}
static void saveProgress(tr_variant* dict, tr_torrent* tor)
{
tr_info const* inf = tr_torrentInfo(tor);
tr_variant* const prog = tr_variantDictAddDict(dict, TR_KEY_progress, 4);
// add the mtimes
size_t const n = inf->fileCount;
tr_variant* const l = tr_variantDictAddList(prog, TR_KEY_mtimes, n);
for (auto const *file = inf->files, *end = file + inf->fileCount; file != end; ++file)
{
tr_variantListAddInt(l, file->mtime);
}
// add the 'checked pieces' bitfield
bitfieldToRaw(&tor->checked_pieces_, tr_variantDictAdd(prog, TR_KEY_pieces));
/* add the progress */
if (tor->completeness == TR_SEED)
{
tr_variantDictAddStrView(prog, TR_KEY_have, "all"sv);
}
/* add the blocks bitfield */
bitfieldToRaw(tor->completion.blockBitfield, tr_variantDictAdd(prog, TR_KEY_blocks));
}
/*
* Transmisison has iterated through a few strategies here, so the
* code has some added complexity to support older approaches.
*
* Current approach: 'progress' is a dict with two entries:
* - 'pieces' a bitfield for whether each piece has been checked.
* - 'mtimes', an array of per-file timestamps
* On startup, 'pieces' is loaded. Then we check to see if the disk
* mtimes differ from the 'mtimes' list. Changed files have their
* pieces cleared from the bitset.
*
* Second approach (2.20 - 3.00): the 'progress' dict had a
* 'time_checked' entry which was a list with fileCount items.
* Each item was either a list of per-piece timestamps, or a
* single timestamp if either all or none of the pieces had been
* tested more recently than the file's mtime.
*
* First approach (pre-2.20) had an "mtimes" list identical to
* 3.10, but not the 'pieces' bitfield.
*/
static uint64_t loadProgress(tr_variant* dict, tr_torrent* tor)
{
auto ret = uint64_t{};
tr_info const* inf = tr_torrentInfo(tor);
tr_variant* prog = nullptr;
if (tr_variantDictFindDict(dict, TR_KEY_progress, &prog))
{
/// CHECKED PIECES
auto checked = tr_bitfield(inf->pieceCount);
auto mtimes = std::vector<time_t>{};
mtimes.reserve(inf->fileCount);
// try to load mtimes
tr_variant* l = nullptr;
if (tr_variantDictFindList(prog, TR_KEY_mtimes, &l))
{
auto fi = size_t{};
auto t = int64_t{};
while (tr_variantGetInt(tr_variantListChild(l, fi++), &t))
{
mtimes.push_back(t);
}
}
// try to load the piece-checked bitfield
uint8_t const* raw = nullptr;
auto rawlen = size_t{};
if (tr_variantDictFindRaw(prog, TR_KEY_pieces, &raw, &rawlen))
{
rawToBitfield(checked, raw, rawlen);
}
// maybe it's a .resume file from [2.20 - 3.00] with the per-piece mtimes
if (tr_variantDictFindList(prog, TR_KEY_time_checked, &l))
{
for (tr_file_index_t fi = 0; fi < inf->fileCount; ++fi)
{
tr_variant* const b = tr_variantListChild(l, fi);
tr_file* const f = &inf->files[fi];
auto time_checked = time_t{};
if (tr_variantIsInt(b))
{
auto t = int64_t{};
tr_variantGetInt(b, &t);
time_checked = time_t(t);
}
else if (tr_variantIsList(b))
{
auto offset = int64_t{};
tr_variantGetInt(tr_variantListChild(b, 0), &offset);
time_checked = tr_time();
size_t const pieces = f->lastPiece + 1 - f->firstPiece;
for (size_t i = 0; i < pieces; ++i)
{
int64_t piece_time = 0;
tr_variantGetInt(tr_variantListChild(b, i + 1), &piece_time);
time_checked = std::min(time_checked, time_t(piece_time));
}
}
mtimes.push_back(time_checked);
}
}
if (std::size(mtimes) != tor->info.fileCount)
{
tr_logAddTorErr(tor, "got %zu mtimes; expected %zu", std::size(mtimes), size_t(tor->info.fileCount));
// if resizing grows the vector, we'll get 0 mtimes for the
// new items which is exactly what we want since the pieces
// in an unknown state should be treated as untested
mtimes.resize(tor->info.fileCount);
}
tor->initCheckedPieces(checked, std::data(mtimes));
/// COMPLETION
auto blocks = tr_bitfield{ tor->blockCount };
char const* err = nullptr;
auto sv = std::string_view{};
tr_variant const* const b = tr_variantDictFind(prog, TR_KEY_blocks);
if (b != nullptr)
{
uint8_t const* buf = nullptr;
auto buflen = size_t{};
if (!tr_variantGetRaw(b, &buf, &buflen))
{
err = "Invalid value for \"blocks\"";
}
else
{
rawToBitfield(blocks, buf, buflen);
}
}
else if (tr_variantDictFindStrView(prog, TR_KEY_have, &sv))
{
if (sv == "all"sv)
{
blocks.setHasAll();
}
else
{
err = "Invalid value for HAVE";
}
}
else if (tr_variantDictFindRaw(prog, TR_KEY_bitfield, &raw, &rawlen))
{
blocks.setRaw(raw, rawlen);
}
else
{
err = "Couldn't find 'pieces' or 'have' or 'bitfield'";
}
if (err != nullptr)
{
tr_logAddTorDbg(tor, "Torrent needs to be verified - %s", err);
}
else
{
tr_cpBlockInit(&tor->completion, blocks);
}
ret = TR_FR_PROGRESS;
}
return ret;
}
/***
****
***/
void tr_torrentSaveResume(tr_torrent* tor)
{
tr_variant top;
if (!tr_isTorrent(tor))
{
return;
}
tr_variantInitDict(&top, 50); /* arbitrary "big enough" number */
tr_variantDictAddInt(&top, TR_KEY_seeding_time_seconds, tor->secondsSeeding);
tr_variantDictAddInt(&top, TR_KEY_downloading_time_seconds, tor->secondsDownloading);
tr_variantDictAddInt(&top, TR_KEY_activity_date, tor->activityDate);
tr_variantDictAddInt(&top, TR_KEY_added_date, tor->addedDate);
tr_variantDictAddInt(&top, TR_KEY_corrupt, tor->corruptPrev + tor->corruptCur);
tr_variantDictAddInt(&top, TR_KEY_done_date, tor->doneDate);
tr_variantDictAddStrView(&top, TR_KEY_destination, tor->downloadDir);
if (tor->incompleteDir != nullptr)
{
tr_variantDictAddStr(&top, TR_KEY_incomplete_dir, tor->incompleteDir);
}
tr_variantDictAddInt(&top, TR_KEY_downloaded, tor->downloadedPrev + tor->downloadedCur);
tr_variantDictAddInt(&top, TR_KEY_uploaded, tor->uploadedPrev + tor->uploadedCur);
tr_variantDictAddInt(&top, TR_KEY_max_peers, tor->maxConnectedPeers);
tr_variantDictAddInt(&top, TR_KEY_bandwidth_priority, tr_torrentGetPriority(tor));
tr_variantDictAddBool(&top, TR_KEY_paused, !tor->isRunning && !tor->isQueued);
savePeers(&top, tor);
if (tr_torrentHasMetadata(tor))
{
saveFilePriorities(&top, tor);
saveDND(&top, tor);
saveProgress(&top, tor);
}
saveSpeedLimits(&top, tor);
saveRatioLimits(&top, tor);
saveIdleLimits(&top, tor);
saveFilenames(&top, tor);
saveName(&top, tor);
saveLabels(&top, tor);
char* const filename = getResumeFilename(tor, TR_METAINFO_BASENAME_HASH);
int const err = tr_variantToFile(&top, TR_VARIANT_FMT_BENC, filename);
if (err != 0)
{
tr_torrentSetLocalError(tor, "Unable to save resume file: %s", tr_strerror(err));
}
tr_free(filename);
tr_variantFree(&top);
}
static uint64_t loadFromFile(tr_torrent* tor, uint64_t fieldsToLoad, bool* didRenameToHashOnlyName)
{
TR_ASSERT(tr_isTorrent(tor));
auto boolVal = false;
auto const wasDirty = tor->isDirty;
auto fieldsLoaded = uint64_t{};
auto i = int64_t{};
auto top = tr_variant{};
auto sv = std::string_view{};
tr_error* error = nullptr;
if (didRenameToHashOnlyName != nullptr)
{
*didRenameToHashOnlyName = false;
}
char* const filename = getResumeFilename(tor, TR_METAINFO_BASENAME_HASH);
auto buf = std::vector<char>{};
if (!tr_loadFile(buf, filename, &error) ||
!tr_variantFromBuf(
&top,
TR_VARIANT_PARSE_BENC | TR_VARIANT_PARSE_INPLACE,
{ std::data(buf), std::size(buf) },
nullptr,
&error))
{
tr_logAddTorDbg(tor, "Couldn't read \"%s\": %s", filename, error->message);
tr_error_clear(&error);
char* old_filename = getResumeFilename(tor, TR_METAINFO_BASENAME_NAME_AND_PARTIAL_HASH);
if (!tr_variantFromFile(&top, TR_VARIANT_PARSE_BENC, old_filename, &error))
{
tr_logAddTorDbg(tor, "Couldn't read \"%s\" either: %s", old_filename, error->message);
tr_error_free(error);
tr_free(old_filename);
tr_free(filename);
return fieldsLoaded;
}
if (tr_sys_path_rename(old_filename, filename, nullptr))
{
tr_logAddTorDbg(tor, "Migrated resume file from \"%s\" to \"%s\"", old_filename, filename);
if (didRenameToHashOnlyName != nullptr)
{
*didRenameToHashOnlyName = true;
}
}
tr_free(old_filename);
}
tr_logAddTorDbg(tor, "Read resume file \"%s\"", filename);
if ((fieldsToLoad & TR_FR_CORRUPT) != 0 && tr_variantDictFindInt(&top, TR_KEY_corrupt, &i))
{
tor->corruptPrev = i;
fieldsLoaded |= TR_FR_CORRUPT;
}
if ((fieldsToLoad & (TR_FR_PROGRESS | TR_FR_DOWNLOAD_DIR)) != 0 &&
tr_variantDictFindStrView(&top, TR_KEY_destination, &sv) && !std::empty(sv))
{
bool const is_current_dir = tor->currentDir == tor->downloadDir;
tr_free(tor->downloadDir);
tor->downloadDir = tr_strvDup(sv);
if (is_current_dir)
{
tor->currentDir = tor->downloadDir;
}
fieldsLoaded |= TR_FR_DOWNLOAD_DIR;
}
if ((fieldsToLoad & (TR_FR_PROGRESS | TR_FR_INCOMPLETE_DIR)) != 0 &&
tr_variantDictFindStrView(&top, TR_KEY_incomplete_dir, &sv) && !std::empty(sv))
{
bool const is_current_dir = tor->currentDir == tor->incompleteDir;
tr_free(tor->incompleteDir);
tor->incompleteDir = tr_strvDup(sv);
if (is_current_dir)
{
tor->currentDir = tor->incompleteDir;
}
fieldsLoaded |= TR_FR_INCOMPLETE_DIR;
}
if ((fieldsToLoad & TR_FR_DOWNLOADED) != 0 && tr_variantDictFindInt(&top, TR_KEY_downloaded, &i))
{
tor->downloadedPrev = i;
fieldsLoaded |= TR_FR_DOWNLOADED;
}
if ((fieldsToLoad & TR_FR_UPLOADED) != 0 && tr_variantDictFindInt(&top, TR_KEY_uploaded, &i))
{
tor->uploadedPrev = i;
fieldsLoaded |= TR_FR_UPLOADED;
}
if ((fieldsToLoad & TR_FR_MAX_PEERS) != 0 && tr_variantDictFindInt(&top, TR_KEY_max_peers, &i))
{
tor->maxConnectedPeers = i;
fieldsLoaded |= TR_FR_MAX_PEERS;
}
if ((fieldsToLoad & TR_FR_RUN) != 0 && tr_variantDictFindBool(&top, TR_KEY_paused, &boolVal))
{
tor->isRunning = !boolVal;
fieldsLoaded |= TR_FR_RUN;
}
if ((fieldsToLoad & TR_FR_ADDED_DATE) != 0 && tr_variantDictFindInt(&top, TR_KEY_added_date, &i))
{
tor->addedDate = i;
fieldsLoaded |= TR_FR_ADDED_DATE;
}
if ((fieldsToLoad & TR_FR_DONE_DATE) != 0 && tr_variantDictFindInt(&top, TR_KEY_done_date, &i))
{
tor->doneDate = i;
fieldsLoaded |= TR_FR_DONE_DATE;
}
if ((fieldsToLoad & TR_FR_ACTIVITY_DATE) != 0 && tr_variantDictFindInt(&top, TR_KEY_activity_date, &i))
{
tr_torrentSetDateActive(tor, i);
fieldsLoaded |= TR_FR_ACTIVITY_DATE;
}
if ((fieldsToLoad & TR_FR_TIME_SEEDING) != 0 && tr_variantDictFindInt(&top, TR_KEY_seeding_time_seconds, &i))
{
tor->secondsSeeding = i;
fieldsLoaded |= TR_FR_TIME_SEEDING;
}
if ((fieldsToLoad & TR_FR_TIME_DOWNLOADING) != 0 && tr_variantDictFindInt(&top, TR_KEY_downloading_time_seconds, &i))
{
tor->secondsDownloading = i;
fieldsLoaded |= TR_FR_TIME_DOWNLOADING;
}
if ((fieldsToLoad & TR_FR_BANDWIDTH_PRIORITY) != 0 && tr_variantDictFindInt(&top, TR_KEY_bandwidth_priority, &i) &&
tr_isPriority(i))
{
tr_torrentSetPriority(tor, i);
fieldsLoaded |= TR_FR_BANDWIDTH_PRIORITY;
}
if ((fieldsToLoad & TR_FR_PEERS) != 0)
{
fieldsLoaded |= loadPeers(&top, tor);
}
if ((fieldsToLoad & TR_FR_PROGRESS) != 0)
{
fieldsLoaded |= loadProgress(&top, tor);
}
// Only load file priorities if we are actually downloading.
// If we're a seed or partial seed, loading it is a waste of time.
// NB: this is why loadProgress() comes before loadFilePriorities()
if ((tr_cpLeftUntilDone(&tor->completion) != 0) && (fieldsToLoad & TR_FR_FILE_PRIORITIES) != 0)
{
fieldsLoaded |= loadFilePriorities(&top, tor);
}
if ((fieldsToLoad & TR_FR_DND) != 0)
{
fieldsLoaded |= loadDND(&top, tor);
}
if ((fieldsToLoad & TR_FR_SPEEDLIMIT) != 0)
{
fieldsLoaded |= loadSpeedLimits(&top, tor);
}
if ((fieldsToLoad & TR_FR_RATIOLIMIT) != 0)
{
fieldsLoaded |= loadRatioLimits(&top, tor);
}
if ((fieldsToLoad & TR_FR_IDLELIMIT) != 0)
{
fieldsLoaded |= loadIdleLimits(&top, tor);
}
if ((fieldsToLoad & TR_FR_FILENAMES) != 0)
{
fieldsLoaded |= loadFilenames(&top, tor);
}
if ((fieldsToLoad & TR_FR_NAME) != 0)
{
fieldsLoaded |= loadName(&top, tor);
}
if ((fieldsToLoad & TR_FR_LABELS) != 0)
{
fieldsLoaded |= loadLabels(&top, tor);
}
/* loading the resume file triggers of a lot of changes,
* but none of them needs to trigger a re-saving of the
* same resume information... */
tor->isDirty = wasDirty;
tr_variantFree(&top);
tr_free(filename);
return fieldsLoaded;
}
static uint64_t setFromCtor(tr_torrent* tor, uint64_t fields, tr_ctor const* ctor, tr_ctorMode mode)
{
uint64_t ret = 0;
if ((fields & TR_FR_RUN) != 0)
{
auto isPaused = bool{};
if (tr_ctorGetPaused(ctor, mode, &isPaused))
{
tor->isRunning = !isPaused;
ret |= TR_FR_RUN;
}
}
if (((fields & TR_FR_MAX_PEERS) != 0) && tr_ctorGetPeerLimit(ctor, mode, &tor->maxConnectedPeers))
{
ret |= TR_FR_MAX_PEERS;
}
if ((fields & TR_FR_DOWNLOAD_DIR) != 0)
{
char const* path = nullptr;
if (tr_ctorGetDownloadDir(ctor, mode, &path) && !tr_str_is_empty(path))
{
ret |= TR_FR_DOWNLOAD_DIR;
tr_free(tor->downloadDir);
tor->downloadDir = tr_strdup(path);
}
}
return ret;
}
static uint64_t useManditoryFields(tr_torrent* tor, uint64_t fields, tr_ctor const* ctor)
{
return setFromCtor(tor, fields, ctor, TR_FORCE);
}
static uint64_t useFallbackFields(tr_torrent* tor, uint64_t fields, tr_ctor const* ctor)
{
return setFromCtor(tor, fields, ctor, TR_FALLBACK);
}
uint64_t tr_torrentLoadResume(tr_torrent* tor, uint64_t fieldsToLoad, tr_ctor const* ctor, bool* didRenameToHashOnlyName)
{
TR_ASSERT(tr_isTorrent(tor));
uint64_t ret = 0;
ret |= useManditoryFields(tor, fieldsToLoad, ctor);
fieldsToLoad &= ~ret;
ret |= loadFromFile(tor, fieldsToLoad, didRenameToHashOnlyName);
fieldsToLoad &= ~ret;
ret |= useFallbackFields(tor, fieldsToLoad, ctor);
return ret;
}
void tr_torrentRemoveResume(tr_torrent const* tor)
{
char* filename = getResumeFilename(tor, TR_METAINFO_BASENAME_HASH);
tr_sys_path_remove(filename, nullptr);
tr_free(filename);
filename = getResumeFilename(tor, TR_METAINFO_BASENAME_NAME_AND_PARTIAL_HASH);
tr_sys_path_remove(filename, nullptr);
tr_free(filename);
}
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