static void
tr_closeAllConnections( void * vsession )
{
tr_session * session = vsession;
tr_torrent * tor;
int i, n;
tr_torrent ** torrents;
assert( tr_isSession( session ) );
tr_statsClose( session );
tr_sharedShuttingDown( session->shared );
tr_rpcClose( &session->rpcServer );
/* close the torrents. get the most active ones first so that
* if we can't get them all closed in a reasonable amount of time,
* at least we get the most important ones first. */
tor = NULL;
n = session->torrentCount;
torrents = tr_new( tr_torrent *, session->torrentCount );
for( i = 0; i < n; ++i )
torrents[i] = tor = tr_torrentNext( session, tor );
qsort( torrents, n, sizeof( tr_torrent* ), compareTorrentByCur );
for( i = 0; i < n; ++i )
tr_torrentFree( torrents[i] );
tr_free( torrents );
tr_peerMgrFree( session->peerMgr );
tr_trackerSessionClose( session );
tr_list_free( &session->blocklists,
(TrListForeachFunc)_tr_blocklistFree );
tr_webClose( &session->web );
session->isClosed = TRUE;
}
void
tr_runInEventThread (tr_session * session,
void func (void*), void * user_data)
{
assert (tr_isSession (session));
assert (session->events != NULL);
if (tr_amInThread (session->events->thread))
{
(func)(user_data);
}
else
{
int fd;
char ch;
ssize_t res_1;
ssize_t res_2;
tr_event_handle * e = session->events;
struct tr_run_data data;
tr_lockLock (e->lock);
fd = e->fds[1];
ch = 'r';
res_1 = pipewrite (fd, &ch, 1);
data.func = func;
data.user_data = user_data;
res_2 = pipewrite (fd, &data, sizeof (data));
tr_lockUnlock (e->lock);
if ((res_1 == -1) || (res_2 == -1))
tr_logAddError ("Unable to write to libtransmisison event queue: %s", tr_strerror(errno));
}
}
double
tr_sessionGetRawSpeed( const tr_session * session, tr_direction dir )
{
return tr_isSession( session ) ? tr_bandwidthGetPieceSpeed( session->bandwidth, 0, dir ) : 0.0;
}
int
tr_sessionCountTorrents( const tr_session * session )
{
return tr_isSession( session ) ? session->torrentCount : 0;
}
tr_bool
tr_globalIsLocked( const tr_session * session )
{
return tr_isSession( session ) && tr_lockHave( session->lock );
}
static void
tr_sessionInitImpl( void * vdata )
{
int64_t i;
int64_t j;
double d;
tr_bool found;
const char * str;
tr_benc settings;
char * filename;
struct init_data * data = vdata;
tr_benc * clientSettings = data->clientSettings;
tr_session * session = data->session;
assert( tr_amInEventThread( session ) );
assert( tr_bencIsDict( clientSettings ) );
dbgmsg( "tr_sessionInit: the session's top-level bandwidth object is %p", session->bandwidth );
tr_bencInitDict( &settings, 0 );
tr_sessionGetDefaultSettings( &settings );
tr_bencMergeDicts( &settings, clientSettings );
#ifndef WIN32
/* Don't exit when writing on a broken socket */
signal( SIGPIPE, SIG_IGN );
#endif
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_LIMIT_TORRENT, &i );
assert( found );
session->peerLimitPerTorrent = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_MSGLEVEL, &i );
assert( found );
tr_setMessageLevel( i );
tr_setMessageQueuing( data->messageQueuingEnabled );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEX_ENABLED, &i );
assert( found );
session->isPexEnabled = i != 0;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_ENCRYPTION, &i );
assert( found );
assert( tr_isEncryptionMode( i ) );
session->encryptionMode = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PREALLOCATION, &i );
assert( found );
assert( tr_isPreallocationMode( i ) );
session->preallocationMode = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_SOCKET_TOS, &i );
assert( found );
session->peerSocketTOS = i;
found = tr_bencDictFindStr( &settings, TR_PREFS_KEY_DOWNLOAD_DIR, &str );
assert( found );
session->downloadDir = tr_strdup( str );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PROXY_ENABLED, &i );
assert( found );
session->isProxyEnabled = i != 0;
found = tr_bencDictFindStr( &settings, TR_PREFS_KEY_PROXY, &str );
assert( found );
session->proxy = tr_strdup( str );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PROXY_PORT, &i );
assert( found );
session->proxyPort = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PROXY_TYPE, &i );
assert( found );
session->proxyType = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PROXY_AUTH_ENABLED, &i );
assert( found );
session->isProxyAuthEnabled = i != 0;
found = tr_bencDictFindStr( &settings, TR_PREFS_KEY_PROXY_USERNAME, &str );
assert( found );
session->proxyUsername = tr_strdup( str );
found = tr_bencDictFindStr( &settings, TR_PREFS_KEY_PROXY_PASSWORD, &str );
assert( found );
session->proxyPassword = tr_strdup( str );
session->so_sndbuf = 1500 * 3; /* 3x MTU for most ethernet/wireless */
session->so_rcvbuf = 8192;
tr_setConfigDir( session, data->configDir );
tr_trackerSessionInit( session );
assert( session->tracker != NULL );
session->peerMgr = tr_peerMgrNew( session );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_LAZY_BITFIELD, &i );
assert( found );
session->useLazyBitfield = i != 0;
/* Initialize rate and file descripts controls */
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_OPEN_FILE_LIMIT, &i );
assert( found );
session->openFileLimit = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_LIMIT_GLOBAL, &j );
assert( found );
tr_fdInit( session->openFileLimit, j );
/**
*** random port
**/
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_PORT_RANDOM_ENABLED, &i );
assert( found );
session->isPortRandom = i != 0;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_PORT_RANDOM_LOW, &i );
assert( found );
session->randomPortLow = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_PORT_RANDOM_HIGH, &i );
assert( found );
session->randomPortHigh = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_PORT_FORWARDING, &i )
&& tr_bencDictFindInt( &settings, TR_PREFS_KEY_PEER_PORT, &j );
assert( found );
session->peerPort = session->isPortRandom ? getRandomPort( session ) : j;
session->shared = tr_sharedInit( session, i, session->peerPort );
session->isPortSet = session->isPortRandom || j>0;
/**
**/
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_UPLOAD_SLOTS_PER_TORRENT, &i );
assert( found );
session->uploadSlotsPerTorrent = i;
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_USPEED, &i )
&& tr_bencDictFindInt( &settings, TR_PREFS_KEY_USPEED_ENABLED, &j );
assert( found );
tr_sessionSetSpeedLimit( session, TR_UP, i );
tr_sessionSetSpeedLimitEnabled( session, TR_UP, j );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_DSPEED, &i )
&& tr_bencDictFindInt( &settings, TR_PREFS_KEY_DSPEED_ENABLED, &j );
assert( found );
tr_sessionSetSpeedLimit( session, TR_DOWN, i );
tr_sessionSetSpeedLimitEnabled( session, TR_DOWN, j );
found = tr_bencDictFindDouble( &settings, TR_PREFS_KEY_RATIO, &d )
&& tr_bencDictFindInt( &settings, TR_PREFS_KEY_RATIO_ENABLED, &j );
assert( found );
tr_sessionSetRatioLimit( session, d );
tr_sessionSetRatioLimited( session, j );
/* initialize the blocklist */
filename = tr_buildPath( session->configDir, "blocklists", NULL );
tr_mkdirp( filename, 0777 );
tr_free( filename );
found = tr_bencDictFindInt( &settings, TR_PREFS_KEY_BLOCKLIST_ENABLED, &i );
assert( found );
session->isBlocklistEnabled = i;
loadBlocklists( session );
session->rpcServer = tr_rpcInit( session, &settings );
tr_bencFree( &settings );
assert( tr_isSession( session ) );
/* first %s is the application name
second %s is the version number */
tr_inf( _( "%s %s started" ), TR_NAME, LONG_VERSION_STRING );
tr_statsInit( session );
session->web = tr_webInit( session );
metainfoLookupRescan( session );
session->isWaiting = FALSE;
dbgmsg( "returning session %p; session->tracker is %p", session, session->tracker );
}
/* returns an fd on success, or a -1 on failure and sets errno */
int
tr_fdFileCheckout( tr_session * session,
int torrentId,
tr_file_index_t fileNum,
const char * filename,
tr_bool doWrite,
tr_preallocation_mode preallocationMode,
uint64_t desiredFileSize )
{
int i, winner = -1;
struct tr_fdInfo * gFd;
struct tr_openfile * o;
assert( tr_isSession( session ) );
assert( session->fdInfo != NULL );
assert( torrentId > 0 );
assert( filename && *filename );
assert( tr_isBool( doWrite ) );
gFd = session->fdInfo;
dbgmsg( "looking for file '%s', writable %c", filename, doWrite ? 'y' : 'n' );
/* is it already open? */
for( i=0; i<gFd->openFileLimit; ++i )
{
o = &gFd->openFiles[i];
if( torrentId != o->torrentId )
continue;
if( fileNum != o->fileNum )
continue;
if( !fileIsOpen( o ) )
continue;
if( doWrite && !o->isWritable )
{
dbgmsg( "found it! it's open and available, but isn't writable. closing..." );
TrCloseFile( o );
break;
}
dbgmsg( "found it! it's ready for use!" );
winner = i;
break;
}
dbgmsg( "it's not already open. looking for an open slot or an old file." );
while( winner < 0 )
{
time_t date = tr_time( ) + 1;
/* look for the file that's been open longest */
for( i=0; i<gFd->openFileLimit; ++i )
{
o = &gFd->openFiles[i];
if( !fileIsOpen( o ) )
{
winner = i;
dbgmsg( "found an empty slot in %d", winner );
break;
}
if( date > o->date )
{
date = o->date;
winner = i;
}
}
assert( winner >= 0 );
if( fileIsOpen( &gFd->openFiles[winner] ) )
{
dbgmsg( "closing file \"%s\"", gFd->openFiles[winner].filename );
TrCloseFile( &gFd->openFiles[winner] );
}
}
assert( winner >= 0 );
o = &gFd->openFiles[winner];
if( !fileIsOpen( o ) )
{
const int err = TrOpenFile( session, winner, filename, doWrite,
preallocationMode, desiredFileSize );
if( err ) {
errno = err;
return -1;
}
dbgmsg( "opened '%s' in slot %d, doWrite %c", filename, winner,
doWrite ? 'y' : 'n' );
tr_strlcpy( o->filename, filename, sizeof( o->filename ) );
o->isWritable = doWrite;
}
dbgmsg( "checking out '%s' in slot %d", filename, winner );
o->torrentId = torrentId;
o->fileNum = fileNum;
o->date = tr_time( );
return o->fd;
}
/**
* returns 0 on success, or an errno value on failure.
* errno values include ENOENT if the parent folder doesn't exist,
* plus the errno values set by tr_mkdirp() and open().
*/
static int
TrOpenFile( tr_session * session,
int i,
const char * filename,
tr_bool doWrite,
tr_preallocation_mode preallocationMode,
uint64_t desiredFileSize )
{
int flags;
struct stat sb;
tr_bool alreadyExisted;
struct tr_openfile * file;
assert( tr_isSession( session ) );
assert( session->fdInfo != NULL );
file = &session->fdInfo->openFiles[i];
/* create subfolders, if any */
if( doWrite )
{
char * dir = tr_dirname( filename );
const int err = tr_mkdirp( dir, 0777 ) ? errno : 0;
if( err ) {
tr_err( _( "Couldn't create \"%1$s\": %2$s" ), dir, tr_strerror( err ) );
tr_free( dir );
return err;
}
tr_free( dir );
}
alreadyExisted = !stat( filename, &sb ) && S_ISREG( sb.st_mode );
if( doWrite && !alreadyExisted && ( preallocationMode == TR_PREALLOCATE_FULL ) )
if( preallocateFileFull( filename, desiredFileSize ) )
tr_dbg( _( "Preallocated file \"%s\"" ), filename );
/* open the file */
flags = doWrite ? ( O_RDWR | O_CREAT ) : O_RDONLY;
#ifdef O_SEQUENTIAL
flags |= O_SEQUENTIAL;
#endif
#ifdef O_LARGEFILE
flags |= O_LARGEFILE;
#endif
#ifdef WIN32
flags |= O_BINARY;
#endif
file->fd = open( filename, flags, 0666 );
if( file->fd == -1 )
{
const int err = errno;
tr_err( _( "Couldn't open \"%1$s\": %2$s" ), filename, tr_strerror( err ) );
return err;
}
/* If the file already exists and it's too large, truncate it.
* This is a fringe case that happens if a torrent's been updated
* and one of the updated torrent's files is smaller.
* http://trac.transmissionbt.com/ticket/2228
* https://bugs.launchpad.net/ubuntu/+source/transmission/+bug/318249
*/
if( alreadyExisted && ( desiredFileSize < (uint64_t)sb.st_size ) )
ftruncate( file->fd, desiredFileSize );
if( doWrite && !alreadyExisted && ( preallocationMode == TR_PREALLOCATE_SPARSE ) )
preallocateFileSparse( file->fd, desiredFileSize );
#ifdef HAVE_POSIX_FADVISE
/* this doubles the OS level readahead buffer, which in practice
* turns out to be a good thing, because many (most?) clients request
* chunks of blocks in order.
* It's okay for this to fail silently, so don't let it affect errno */
{
const int err = errno;
posix_fadvise( file->fd, 0, 0, POSIX_FADV_SEQUENTIAL );
errno = err;
}
#endif
#if defined( SYS_DARWIN )
/**
* 1. Enable readahead for reasons described above w/POSIX_FADV_SEQUENTIAL.
*
* 2. Disable OS-level caching due to user reports of adverse effects of
* excessive inactive memory. However this is experimental because
* previous attempts at this have *also* had adverse effects (see r8198)
*
* It's okay for this to fail silently, so don't let it affect errno
*/
{
const int err = errno;
fcntl( file->fd, F_NOCACHE, 1 );
fcntl( file->fd, F_RDAHEAD, 1 );
errno = err;
}
#endif
return 0;
}
static void
canReadWrapper( tr_peerIo * io )
{
tr_bool err = 0;
tr_bool done = 0;
tr_session * session;
dbgmsg( io, "canRead" );
assert( tr_isPeerIo( io ) );
assert( tr_isSession( io->session ) );
tr_peerIoRef( io );
session = io->session;
/* try to consume the input buffer */
if( io->canRead )
{
tr_sessionLock( session );
while( !done && !err )
{
size_t piece = 0;
const size_t oldLen = EVBUFFER_LENGTH( io->inbuf );
const int ret = io->canRead( io, io->userData, &piece );
const size_t used = oldLen - EVBUFFER_LENGTH( io->inbuf );
assert( tr_isPeerIo( io ) );
if( piece || (piece!=used) )
{
const uint64_t now = tr_time_msec( );
if( piece )
tr_bandwidthUsed( &io->bandwidth, TR_DOWN, piece, TRUE, now );
if( used != piece )
tr_bandwidthUsed( &io->bandwidth, TR_DOWN, used - piece, FALSE, now );
}
switch( ret )
{
case READ_NOW:
if( EVBUFFER_LENGTH( io->inbuf ) )
continue;
done = 1;
break;
case READ_LATER:
done = 1;
break;
case READ_ERR:
err = 1;
break;
}
assert( tr_isPeerIo( io ) );
}
tr_sessionUnlock( session );
}
/* keep the iobuf's excess capacity from growing too large */
if( EVBUFFER_LENGTH( io->inbuf ) == 0 ) {
evbuffer_free( io->inbuf );
io->inbuf = evbuffer_new( );
}
assert( tr_isPeerIo( io ) );
tr_peerIoUnref( io );
}