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transmission/libtransmission/resume.c

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/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2 (b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <unistd.h> /* unlink */
#include <string.h>
#include "transmission.h"
#include "completion.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 "utils.h" /* tr_buildPath */
#include "variant.h"
enum
{
MAX_REMEMBERED_PEERS = 200
};
static char*
getResumeFilename (const tr_torrent * tor)
{
char * base = tr_metainfoGetBasename (tr_torrentInfo (tor));
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, const tr_torrent * tor)
{
int count;
tr_pex * pex;
count = tr_peerMgrGetPeers ((tr_torrent*) 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 ((tr_torrent*) 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 int
addPeers (tr_torrent * tor, const uint8_t * buf, int buflen)
{
int i;
int numAdded = 0;
const int count = buflen / sizeof (tr_pex);
for (i=0; i<count && numAdded<MAX_REMEMBERED_PEERS; ++i)
{
tr_pex pex;
memcpy (&pex, buf + (i * sizeof (tr_pex)), sizeof (tr_pex));
if (tr_isPex (&pex))
{
tr_peerMgrAddPex (tor, TR_PEER_FROM_RESUME, &pex, -1);
++numAdded;
}
}
return numAdded;
}
static uint64_t
loadPeers (tr_variant * dict, tr_torrent * tor)
{
uint64_t ret = 0;
const uint8_t * str;
size_t len;
if (tr_variantDictFindRaw (dict, TR_KEY_peers, &str, &len))
{
const int numAdded = addPeers (tor, str, len);
tr_tordbg (tor, "Loaded %d IPv4 peers from resume file", numAdded);
ret = TR_FR_PEERS;
}
if (tr_variantDictFindRaw (dict, TR_KEY_peers6, &str, &len))
{
const int numAdded = addPeers (tor, str, len);
tr_tordbg (tor, "Loaded %d IPv6 peers from resume file", numAdded);
ret = TR_FR_PEERS;
}
return ret;
}
/***
****
***/
static void
saveDND (tr_variant * dict, const tr_torrent * tor)
{
tr_variant * list;
tr_file_index_t i;
const tr_info * const inf = tr_torrentInfo (tor);
const tr_file_index_t n = inf->fileCount;
list = tr_variantDictAddList (dict, TR_KEY_dnd, n);
for (i=0; i<n; ++i)
tr_variantListAddInt (list, inf->files[i].dnd ? 1 : 0);
}
static uint64_t
loadDND (tr_variant * dict, tr_torrent * tor)
{
uint64_t ret = 0;
tr_variant * list = NULL;
const tr_file_index_t n = tor->info.fileCount;
if (tr_variantDictFindList (dict, TR_KEY_dnd, &list)
&& (tr_variantListSize (list) == n))
{
int64_t tmp;
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 i, dlCount = 0, dndCount = 0;
for (i=0; i<n; ++i)
{
if (tr_variantGetInt (tr_variantListChild (list, i), &tmp) && tmp)
dnd[dndCount++] = i;
else
dl[dlCount++] = i;
}
if (dndCount)
{
tr_torrentInitFileDLs (tor, dnd, dndCount, false);
tr_tordbg (tor, "Resume file found %d files listed as dnd",
dndCount);
}
if (dlCount)
{
tr_torrentInitFileDLs (tor, dl, dlCount, true);
tr_tordbg (tor,
"Resume file found %d files marked for download",
dlCount);
}
tr_free (dnd);
tr_free (dl);
ret = TR_FR_DND;
}
else
{
tr_tordbg (
tor,
"Couldn't load DND flags. DND list (%p) has %zu children; torrent has %d files",
list, tr_variantListSize (list), (int)n);
}
return ret;
}
/***
****
***/
static void
saveFilePriorities (tr_variant * dict, const tr_torrent * tor)
{
tr_variant * list;
tr_file_index_t i;
const tr_info * const inf = tr_torrentInfo (tor);
const tr_file_index_t n = inf->fileCount;
list = tr_variantDictAddList (dict, TR_KEY_priority, n);
for (i = 0; i < n; ++i)
tr_variantListAddInt (list, inf->files[i].priority);
}
static uint64_t
loadFilePriorities (tr_variant * dict, tr_torrent * tor)
{
tr_variant * list;
uint64_t ret = 0;
const tr_file_index_t n = tor->info.fileCount;
if (tr_variantDictFindList (dict, TR_KEY_priority, &list)
&& (tr_variantListSize (list) == n))
{
int64_t priority;
tr_file_index_t i;
for (i = 0; i < n; ++i)
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)
{
int64_t i;
bool boolVal;
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);
}
enum old_speed_modes
{
TR_SPEEDLIMIT_GLOBAL, /* only follow the overall speed limit */
TR_SPEEDLIMIT_SINGLE /* only follow the per-torrent limit */
};
static uint64_t
loadSpeedLimits (tr_variant * dict, tr_torrent * tor)
{
tr_variant * d;
uint64_t ret = 0;
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)
{
tr_variant * d;
uint64_t ret = 0;
if (tr_variantDictFindDict (dict, TR_KEY_ratio_limit, &d))
{
int64_t i;
double dratio;
if (tr_variantDictFindReal (d, TR_KEY_ratio_limit, &dratio))
tr_torrentSetRatioLimit (tor, dratio);
if (tr_variantDictFindInt (d, TR_KEY_ratio_mode, &i))
tr_torrentSetRatioMode (tor, i);
ret = TR_FR_RATIOLIMIT;
}
return ret;
}
static uint64_t
loadIdleLimits (tr_variant * dict, tr_torrent * tor)
{
tr_variant * d;
uint64_t ret = 0;
if (tr_variantDictFindDict (dict, TR_KEY_idle_limit, &d))
{
int64_t i;
int64_t imin;
if (tr_variantDictFindInt (d, TR_KEY_idle_limit, &imin))
tr_torrentSetIdleLimit (tor, imin);
if (tr_variantDictFindInt (d, TR_KEY_idle_mode, &i))
tr_torrentSetIdleMode (tor, i);
ret = TR_FR_IDLELIMIT;
}
return ret;
}
/***
****
***/
static void
bitfieldToBenc (const tr_bitfield * b, tr_variant * benc)
{
if (tr_bitfieldHasAll (b))
tr_variantInitStr (benc, "all", 3);
else if (tr_bitfieldHasNone (b))
tr_variantInitStr (benc, "none", 4);
else {
size_t byte_count = 0;
uint8_t * raw = tr_bitfieldGetRaw (b, &byte_count);
tr_variantInitRaw (benc, raw, byte_count);
tr_free (raw);
}
}
static void
saveProgress (tr_variant * dict, tr_torrent * tor)
{
tr_variant * l;
tr_variant * prog;
tr_file_index_t fi;
const tr_info * inf = tr_torrentInfo (tor);
const time_t now = tr_time ();
prog = tr_variantDictAddDict (dict, TR_KEY_progress, 3);
/* add the file/piece check timestamps... */
l = tr_variantDictAddList (prog, TR_KEY_time_checked, inf->fileCount);
for (fi=0; fi<inf->fileCount; ++fi)
{
const tr_piece * p;
const tr_piece * pend;
time_t oldest_nonzero = now;
time_t newest = 0;
bool has_zero = false;
const time_t mtime = tr_torrentGetFileMTime (tor, fi);
const tr_file * f = &inf->files[fi];
/* get the oldest and newest nonzero timestamps for pieces in this file */
for (p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]; p!=pend; ++p)
{
if (!p->timeChecked)
has_zero = true;
else if (oldest_nonzero > p->timeChecked)
oldest_nonzero = p->timeChecked;
if (newest < p->timeChecked)
newest = p->timeChecked;
}
/* If some of a file's pieces have been checked more recently than
the file's mtime, and some lest recently, then that file will
have a list containing timestamps for each piece.
However, the most common use case is that the file doesn't change
after it's downloaded. To reduce overhead in the .resume file,
only a single timestamp is saved for the file if *all* or *none*
of the pieces were tested more recently than the file's mtime. */
if (!has_zero && (mtime <= oldest_nonzero)) /* all checked */
tr_variantListAddInt (l, oldest_nonzero);
else if (newest < mtime) /* none checked */
tr_variantListAddInt (l, newest);
else { /* some are checked, some aren't... so list piece by piece */
const int offset = oldest_nonzero - 1;
tr_variant * ll = tr_variantListAddList (l, 2 + f->lastPiece - f->firstPiece);
tr_variantListAddInt (ll, offset);
for (p=&inf->pieces[f->firstPiece], pend=&inf->pieces[f->lastPiece]+1; p!=pend; ++p)
tr_variantListAddInt (ll, p->timeChecked ? p->timeChecked - offset : 0);
}
}
/* add the progress */
if (tor->completeness == TR_SEED)
tr_variantDictAddStr (prog, TR_KEY_have, "all");
/* add the blocks bitfield */
bitfieldToBenc (&tor->completion.blockBitfield, tr_variantDictAdd (prog, TR_KEY_blocks));
}
static uint64_t
loadProgress (tr_variant * dict, tr_torrent * tor)
{
size_t i, n;
uint64_t ret = 0;
tr_variant * prog;
const tr_info * inf = tr_torrentInfo (tor);
for (i=0, n=inf->pieceCount; i<n; ++i)
inf->pieces[i].timeChecked = 0;
if (tr_variantDictFindDict (dict, TR_KEY_progress, &prog))
{
const char * err;
const char * str;
const uint8_t * raw;
size_t rawlen;
tr_variant * l;
tr_variant * b;
struct tr_bitfield blocks = TR_BITFIELD_INIT;
if (tr_variantDictFindList (prog, TR_KEY_time_checked, &l))
{
/* per-piece timestamps were added in 2.20.
If some of a file's pieces have been checked more recently than
the file's mtime, and some lest recently, then that file will
have a list containing timestamps for each piece.
However, the most common use case is that the file doesn't change
after it's downloaded. To reduce overhead in the .resume file,
only a single timestamp is saved for the file if *all* or *none*
of the pieces were tested more recently than the file's mtime. */
tr_file_index_t fi;
for (fi=0; fi<inf->fileCount; ++fi)
{
tr_variant * b = tr_variantListChild (l, fi);
const tr_file * f = &inf->files[fi];
tr_piece * p = &inf->pieces[f->firstPiece];
const tr_piece * pend = &inf->pieces[f->lastPiece]+1;
if (tr_variantIsInt (b))
{
int64_t t;
tr_variantGetInt (b, &t);
for (; p!=pend; ++p)
p->timeChecked = (time_t)t;
}
else if (tr_variantIsList (b))
{
int i = 0;
int64_t offset = 0;
const int pieces = f->lastPiece + 1 - f->firstPiece;
tr_variantGetInt (tr_variantListChild (b, 0), &offset);
for (i=0; i<pieces; ++i)
{
int64_t t = 0;
tr_variantGetInt (tr_variantListChild (b, i+1), &t);
inf->pieces[f->firstPiece+i].timeChecked = (time_t)(t ? t + offset : 0);
}
}
}
}
else if (tr_variantDictFindList (prog, TR_KEY_mtimes, &l))
{
tr_file_index_t fi;
/* Before 2.20, we stored the files' mtimes in the .resume file.
When loading the .resume file, a torrent's file would be flagged
as untested if its stored mtime didn't match its real mtime. */
for (fi=0; fi<inf->fileCount; ++fi)
{
int64_t t;
if (tr_variantGetInt (tr_variantListChild (l, fi), &t))
{
const tr_file * f = &inf->files[fi];
tr_piece * p = &inf->pieces[f->firstPiece];
const tr_piece * pend = &inf->pieces[f->lastPiece];
const time_t mtime = tr_torrentGetFileMTime (tor, fi);
const time_t timeChecked = mtime==t ? mtime : 0;
for (; p!=pend; ++p)
p->timeChecked = timeChecked;
}
}
}
err = NULL;
tr_bitfieldConstruct (&blocks, tor->blockCount);
if ((b = tr_variantDictFind (prog, TR_KEY_blocks)))
{
size_t buflen;
const uint8_t * buf;
if (!tr_variantGetRaw (b, &buf, &buflen))
err = "Invalid value for \"blocks\"";
else if ((buflen == 3) && !memcmp (buf, "all", 3))
tr_bitfieldSetHasAll (&blocks);
else if ((buflen == 4) && !memcmp (buf, "none", 4))
tr_bitfieldSetHasNone (&blocks);
else
tr_bitfieldSetRaw (&blocks, buf, buflen, true);
}
else if (tr_variantDictFindStr (prog, TR_KEY_have, &str, NULL))
{
if (!strcmp (str, "all"))
tr_bitfieldSetHasAll (&blocks);
else
err = "Invalid value for HAVE";
}
else if (tr_variantDictFindRaw (prog, TR_KEY_bitfield, &raw, &rawlen))
{
tr_bitfieldSetRaw (&blocks, raw, rawlen, true);
}
else err = "Couldn't find 'pieces' or 'have' or 'bitfield'";
if (err != NULL)
tr_tordbg (tor, "Torrent needs to be verified - %s", err);
else
tr_cpBlockInit (&tor->completion, &blocks);
tr_bitfieldDestruct (&blocks);
ret = TR_FR_PROGRESS;
}
return ret;
}
/***
****
***/
void
tr_torrentSaveResume (tr_torrent * tor)
{
int err;
tr_variant top;
char * filename;
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_variantDictAddStr (&top, TR_KEY_destination, tor->downloadDir);
if (tor->incompleteDir != NULL)
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);
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);
filename = getResumeFilename (tor);
if ((err = tr_variantToFile (&top, TR_VARIANT_FMT_BENC, filename)))
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)
{
size_t len;
int64_t i;
const char * str;
char * filename;
tr_variant top;
bool boolVal;
uint64_t fieldsLoaded = 0;
const bool wasDirty = tor->isDirty;
assert (tr_isTorrent (tor));
filename = getResumeFilename (tor);
if (tr_variantFromFile (&top, TR_VARIANT_FMT_BENC, filename))
{
tr_tordbg (tor, "Couldn't read \"%s\"", filename);
tr_free (filename);
return fieldsLoaded;
}
tr_tordbg (tor, "Read resume file \"%s\"", filename);
if ((fieldsToLoad & TR_FR_CORRUPT)
&& tr_variantDictFindInt (&top, TR_KEY_corrupt, &i))
{
tor->corruptPrev = i;
fieldsLoaded |= TR_FR_CORRUPT;
}
if ((fieldsToLoad & (TR_FR_PROGRESS | TR_FR_DOWNLOAD_DIR))
&& (tr_variantDictFindStr (&top, TR_KEY_destination, &str, &len))
&& (str && *str))
{
tr_free (tor->downloadDir);
tor->downloadDir = tr_strndup (str, len);
fieldsLoaded |= TR_FR_DOWNLOAD_DIR;
}
if ((fieldsToLoad & (TR_FR_PROGRESS | TR_FR_INCOMPLETE_DIR))
&& (tr_variantDictFindStr (&top, TR_KEY_incomplete_dir, &str, &len))
&& (str && *str))
{
tr_free (tor->incompleteDir);
tor->incompleteDir = tr_strndup (str, len);
fieldsLoaded |= TR_FR_INCOMPLETE_DIR;
}
if ((fieldsToLoad & TR_FR_DOWNLOADED)
&& tr_variantDictFindInt (&top, TR_KEY_downloaded, &i))
{
tor->downloadedPrev = i;
fieldsLoaded |= TR_FR_DOWNLOADED;
}
if ((fieldsToLoad & TR_FR_UPLOADED)
&& tr_variantDictFindInt (&top, TR_KEY_uploaded, &i))
{
tor->uploadedPrev = i;
fieldsLoaded |= TR_FR_UPLOADED;
}
if ((fieldsToLoad & TR_FR_MAX_PEERS)
&& tr_variantDictFindInt (&top, TR_KEY_max_peers, &i))
{
tor->maxConnectedPeers = i;
fieldsLoaded |= TR_FR_MAX_PEERS;
}
if ((fieldsToLoad & TR_FR_RUN)
&& tr_variantDictFindBool (&top, TR_KEY_paused, &boolVal))
{
tor->isRunning = !boolVal;
fieldsLoaded |= TR_FR_RUN;
}
if ((fieldsToLoad & TR_FR_ADDED_DATE)
&& tr_variantDictFindInt (&top, TR_KEY_added_date, &i))
{
tor->addedDate = i;
fieldsLoaded |= TR_FR_ADDED_DATE;
}
if ((fieldsToLoad & TR_FR_DONE_DATE)
&& tr_variantDictFindInt (&top, TR_KEY_done_date, &i))
{
tor->doneDate = i;
fieldsLoaded |= TR_FR_DONE_DATE;
}
if ((fieldsToLoad & TR_FR_ACTIVITY_DATE)
&& tr_variantDictFindInt (&top, TR_KEY_activity_date, &i))
{
tr_torrentSetActivityDate (tor, i);
fieldsLoaded |= TR_FR_ACTIVITY_DATE;
}
if ((fieldsToLoad & TR_FR_TIME_SEEDING)
&& tr_variantDictFindInt (&top, TR_KEY_seeding_time_seconds, &i))
{
tor->secondsSeeding = i;
fieldsLoaded |= TR_FR_TIME_SEEDING;
}
if ((fieldsToLoad & TR_FR_TIME_DOWNLOADING)
&& tr_variantDictFindInt (&top, TR_KEY_downloading_time_seconds, &i))
{
tor->secondsDownloading = i;
fieldsLoaded |= TR_FR_TIME_DOWNLOADING;
}
if ((fieldsToLoad & TR_FR_BANDWIDTH_PRIORITY)
&& 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)
fieldsLoaded |= loadPeers (&top, tor);
if (fieldsToLoad & TR_FR_FILE_PRIORITIES)
fieldsLoaded |= loadFilePriorities (&top, tor);
if (fieldsToLoad & TR_FR_PROGRESS)
fieldsLoaded |= loadProgress (&top, tor);
if (fieldsToLoad & TR_FR_DND)
fieldsLoaded |= loadDND (&top, tor);
if (fieldsToLoad & TR_FR_SPEEDLIMIT)
fieldsLoaded |= loadSpeedLimits (&top, tor);
if (fieldsToLoad & TR_FR_RATIOLIMIT)
fieldsLoaded |= loadRatioLimits (&top, tor);
if (fieldsToLoad & TR_FR_IDLELIMIT)
fieldsLoaded |= loadIdleLimits (&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, const tr_ctor * ctor, int mode)
{
uint64_t ret = 0;
if (fields & TR_FR_RUN)
{
bool isPaused;
if (!tr_ctorGetPaused (ctor, mode, &isPaused))
{
tor->isRunning = !isPaused;
ret |= TR_FR_RUN;
}
}
if (fields & TR_FR_MAX_PEERS)
if (!tr_ctorGetPeerLimit (ctor, mode, &tor->maxConnectedPeers))
ret |= TR_FR_MAX_PEERS;
if (fields & TR_FR_DOWNLOAD_DIR)
{
const char * path;
if (!tr_ctorGetDownloadDir (ctor, mode, &path) && path && *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, const tr_ctor * ctor)
{
return setFromCtor (tor, fields, ctor, TR_FORCE);
}
static uint64_t
useFallbackFields (tr_torrent * tor, uint64_t fields, const tr_ctor * ctor)
{
return setFromCtor (tor, fields, ctor, TR_FALLBACK);
}
uint64_t
tr_torrentLoadResume (tr_torrent * tor,
uint64_t fieldsToLoad,
const tr_ctor * ctor)
{
uint64_t ret = 0;
assert (tr_isTorrent (tor));
ret |= useManditoryFields (tor, fieldsToLoad, ctor);
fieldsToLoad &= ~ret;
ret |= loadFromFile (tor, fieldsToLoad);
fieldsToLoad &= ~ret;
ret |= useFallbackFields (tor, fieldsToLoad, ctor);
return ret;
}
void
tr_torrentRemoveResume (const tr_torrent * tor)
{
char * filename = getResumeFilename (tor);
unlink (filename);
tr_free (filename);
}
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