static void
cached_file_close (struct tr_cached_file * o)
{
assert (cached_file_is_open (o));
tr_close_file (o->fd);
o->fd = -1;
}
static void
TrCloseFile( struct tr_openfile * o )
{
assert( o != NULL );
assert( fileIsOpen( o ) );
tr_close_file( o->fd );
o->fd = -1;
}
static tr_bool
verifyTorrent( tr_torrent * tor, tr_bool * stopFlag )
{
time_t end;
SHA_CTX sha;
int fd = -1;
int64_t filePos = 0;
tr_bool changed = 0;
tr_bool hadPiece = 0;
time_t lastSleptAt = 0;
uint32_t piecePos = 0;
tr_file_index_t fileIndex = 0;
tr_file_index_t prevFileIndex = !fileIndex;
tr_piece_index_t pieceIndex = 0;
const time_t begin = tr_time( );
const size_t buflen = 1024 * 128; /* 128 KiB buffer */
uint8_t * buffer = tr_valloc( buflen );
SHA1_Init( &sha );
tr_tordbg( tor, "%s", "verifying torrent..." );
tr_torrentSetChecked( tor, 0 );
while( !*stopFlag && ( pieceIndex < tor->info.pieceCount ) )
{
uint32_t leftInPiece;
uint32_t bytesThisPass;
uint64_t leftInFile;
const tr_file * file = &tor->info.files[fileIndex];
/* if we're starting a new piece... */
if( piecePos == 0 )
hadPiece = tr_cpPieceIsComplete( &tor->completion, pieceIndex );
/* if we're starting a new file... */
if( !filePos && (fd<0) && (fileIndex!=prevFileIndex) )
{
char * filename = tr_torrentFindFile( tor, fileIndex );
fd = filename == NULL ? -1 : tr_open_file_for_scanning( filename );
tr_free( filename );
prevFileIndex = fileIndex;
}
/* figure out how much we can read this pass */
leftInPiece = tr_torPieceCountBytes( tor, pieceIndex ) - piecePos;
leftInFile = file->length - filePos;
bytesThisPass = MIN( leftInFile, leftInPiece );
bytesThisPass = MIN( bytesThisPass, buflen );
/* read a bit */
if( fd >= 0 ) {
const ssize_t numRead = tr_pread( fd, buffer, bytesThisPass, filePos );
if( numRead > 0 ) {
bytesThisPass = (uint32_t)numRead;
SHA1_Update( &sha, buffer, bytesThisPass );
#if defined HAVE_POSIX_FADVISE && defined POSIX_FADV_DONTNEED
posix_fadvise( fd, filePos, bytesThisPass, POSIX_FADV_DONTNEED );
#endif
}
}
/* move our offsets */
leftInPiece -= bytesThisPass;
leftInFile -= bytesThisPass;
piecePos += bytesThisPass;
filePos += bytesThisPass;
/* if we're finishing a piece... */
if( leftInPiece == 0 )
{
time_t now;
tr_bool hasPiece;
uint8_t hash[SHA_DIGEST_LENGTH];
SHA1_Final( hash, &sha );
hasPiece = !memcmp( hash, tor->info.pieces[pieceIndex].hash, SHA_DIGEST_LENGTH );
if( hasPiece || hadPiece ) {
tr_torrentSetHasPiece( tor, pieceIndex, hasPiece );
changed |= hasPiece != hadPiece;
}
tr_torrentSetPieceChecked( tor, pieceIndex );
now = tr_time( );
tor->anyDate = now;
/* sleeping even just a few msec per second goes a long
* way towards reducing IO load... */
if( lastSleptAt != now ) {
lastSleptAt = now;
tr_wait_msec( MSEC_TO_SLEEP_PER_SECOND_DURING_VERIFY );
}
SHA1_Init( &sha );
++pieceIndex;
piecePos = 0;
}
/* if we're finishing a file... */
if( leftInFile == 0 )
{
if( fd >= 0 ) { tr_close_file( fd ); fd = -1; }
++fileIndex;
filePos = 0;
}
}
/* cleanup */
if( fd >= 0 )
tr_close_file( fd );
free( buffer );
/* stopwatch */
end = tr_time( );
tr_tordbg( tor, "Verification is done. It took %d seconds to verify %"PRIu64" bytes (%"PRIu64" bytes per second)",
(int)(end-begin), tor->info.totalSize,
(uint64_t)(tor->info.totalSize/(1+(end-begin))) );
return changed;
}
static tr_bool
verifyTorrent( tr_torrent * tor, tr_bool * stopFlag )
{
SHA_CTX sha;
int fd = -1;
int64_t filePos = 0;
tr_bool changed = 0;
tr_bool hadPiece = 0;
uint32_t piecePos = 0;
uint32_t pieceBytesRead = 0;
tr_file_index_t fileIndex = 0;
tr_piece_index_t pieceIndex = 0;
const int64_t buflen = tor->info.pieceSize;
uint8_t * buffer = tr_new( uint8_t, buflen );
#ifdef STOPWATCH
time_t now = time( NULL );
#endif
SHA1_Init( &sha );
while( !*stopFlag && ( pieceIndex < tor->info.pieceCount ) )
{
int64_t leftInPiece;
int64_t leftInFile;
int64_t bytesThisPass;
const tr_file * file = &tor->info.files[fileIndex];
/* if we're starting a new piece... */
if( piecePos == 0 )
{
hadPiece = tr_cpPieceIsComplete( &tor->completion, pieceIndex );
/* fprintf( stderr, "starting piece %d of %d\n", (int)pieceIndex, (int)tor->info.pieceCount ); */
}
/* if we're starting a new file... */
if( !filePos && (fd<0) )
{
char * filename = tr_buildPath( tor->downloadDir, file->name, NULL );
fd = tr_open_file_for_scanning( filename );
/* fprintf( stderr, "opening file #%d (%s) -- %d\n", fileIndex, filename, fd ); */
tr_free( filename );
}
/* figure out how much we can read this pass */
leftInPiece = tr_torPieceCountBytes( tor, pieceIndex ) - piecePos;
leftInFile = file->length - filePos;
bytesThisPass = MIN( leftInFile, leftInPiece );
bytesThisPass = MIN( bytesThisPass, buflen );
/* fprintf( stderr, "reading this pass: %d\n", (int)bytesThisPass ); */
/* read a bit */
if( (fd>=0) && tr_lseek( fd, filePos, SEEK_SET ) != -1 ) {
const int64_t numRead = read( fd, buffer, bytesThisPass );
if( numRead > 0 )
pieceBytesRead += numRead;
if( numRead == bytesThisPass )
SHA1_Update( &sha, buffer, numRead );
}
/* move our offsets */
leftInPiece -= bytesThisPass;
leftInFile -= bytesThisPass;
piecePos += bytesThisPass;
filePos += bytesThisPass;
/* if we're finishing a piece... */
if( leftInPiece == 0 )
{
tr_bool hasPiece;
uint8_t hash[SHA_DIGEST_LENGTH];
SHA1_Final( hash, &sha );
hasPiece = !memcmp( hash, tor->info.pieces[pieceIndex].hash, SHA_DIGEST_LENGTH );
/* fprintf( stderr, "do the hashes match? %s\n", (hasPiece?"yes":"no") ); */
if( hasPiece ) {
tr_torrentSetHasPiece( tor, pieceIndex, TRUE );
if( !hadPiece )
changed = TRUE;
} else if( hadPiece ) {
tr_torrentSetHasPiece( tor, pieceIndex, FALSE );
changed = TRUE;
}
tr_torrentSetPieceChecked( tor, pieceIndex, TRUE );
tor->anyDate = time( NULL );
/* going full-throttle on a verify can choke other processes'
* disk IO, so wait a fwe msec between pieces.
* The msec is arbitrary, and the "if" clause is to make sure we
* don't slow down verification of files that don't exist */
if( pieceBytesRead == tr_torPieceCountBytes( tor, pieceIndex ) )
tr_wait( 50 );
SHA1_Init( &sha );
++pieceIndex;
piecePos = 0;
pieceBytesRead = 0;
}
/* if we're finishing a file... */
if( leftInFile == 0 )
{
/* fprintf( stderr, "closing file\n" ); */
if( fd >= 0 ) {
tr_close_file( fd );
fd = -1;
}
++fileIndex;
filePos = 0;
}
}
/* cleanup */
if( fd >= 0 )
tr_close_file( fd );
tr_free( buffer );
#ifdef STOPWATCH
{
time_t now2 = time( NULL );
fprintf( stderr, "it took %d seconds to verify %"PRIu64" bytes (%"PRIu64" bytes per second)\n",
(int)(now2-now), tor->info.totalSize, (uint64_t)(tor->info.totalSize/(1+(now2-now))) );
}
#endif
return changed;
}
