|
|
|
@ -6,6 +6,7 @@ |
|
|
|
|
#include <sys/mman.h> |
|
|
|
|
#include <stdio.h> |
|
|
|
|
#include <string.h> |
|
|
|
|
#include <pthread.h> |
|
|
|
|
|
|
|
|
|
/* Libowfat */ |
|
|
|
|
#include "scan.h" |
|
|
|
@ -17,6 +18,9 @@ |
|
|
|
|
#include "ot_sync.h" |
|
|
|
|
|
|
|
|
|
#ifdef WANT_TRACKER_SYNC |
|
|
|
|
|
|
|
|
|
#define OT_SYNC_CHUNK_SIZE (512*1024) |
|
|
|
|
|
|
|
|
|
/* Import Changeset from an external authority
|
|
|
|
|
format: d4:syncd[..]ee |
|
|
|
|
[..]: ( 20:01234567890abcdefghij16:XXXXYYYY )+ |
|
|
|
@ -60,48 +64,103 @@ int add_changeset_to_tracker( ot_byte *data, size_t len ) { |
|
|
|
|
/* Proposed output format
|
|
|
|
|
d4:syncd20:<info_hash>8*N:(xxxxyyyy)*Nee |
|
|
|
|
*/ |
|
|
|
|
size_t return_changeset_for_tracker( char **reply ) { |
|
|
|
|
size_t allocated = 0, i, replysize; |
|
|
|
|
ot_vector *torrents_list; |
|
|
|
|
static void sync_make( int *iovec_entries, struct iovec **iovector ) { |
|
|
|
|
int bucket; |
|
|
|
|
char *r; |
|
|
|
|
char *r, *re; |
|
|
|
|
|
|
|
|
|
/* Maybe there is time to clean_all_torrents(); */ |
|
|
|
|
/* Setup return vector... */ |
|
|
|
|
*iovec_entries = 0; |
|
|
|
|
*iovector = NULL; |
|
|
|
|
if( !( r = iovec_increase( iovec_entries, iovector, OT_SYNC_CHUNK_SIZE ) ) ) |
|
|
|
|
return; |
|
|
|
|
|
|
|
|
|
/* Determine space needed for whole changeset */ |
|
|
|
|
for( bucket = 0; bucket < OT_BUCKET_COUNT; ++bucket ) { |
|
|
|
|
torrents_list = mutex_bucket_lock(bucket); |
|
|
|
|
for( i=0; i<torrents_list->size; ++i ) { |
|
|
|
|
ot_torrent *torrent = ((ot_torrent*)(torrents_list->data)) + i; |
|
|
|
|
allocated += sizeof( ot_hash ) + sizeof(ot_peer) * torrent->peer_list->changeset.size + 13; |
|
|
|
|
} |
|
|
|
|
mutex_bucket_unlock(bucket); |
|
|
|
|
} |
|
|
|
|
/* ... and pointer to end of current output buffer.
|
|
|
|
|
This works as a low watermark */ |
|
|
|
|
re = r + OT_SYNC_CHUNK_SIZE; |
|
|
|
|
|
|
|
|
|
/* add "d4:syncd" and "ee" */ |
|
|
|
|
allocated += 8 + 2; |
|
|
|
|
memmove( r, "d4:syncd", 8 ); r += 8; |
|
|
|
|
|
|
|
|
|
if( !( r = *reply = mmap( NULL, allocated, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0 ) ) ) |
|
|
|
|
return 0; |
|
|
|
|
/* For each bucket... */ |
|
|
|
|
for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket ) { |
|
|
|
|
/* Get exclusive access to that bucket */ |
|
|
|
|
ot_vector *torrents_list = mutex_bucket_lock( bucket ); |
|
|
|
|
size_t tor_offset; |
|
|
|
|
|
|
|
|
|
/* For each torrent in this bucket.. */ |
|
|
|
|
for( tor_offset=0; tor_offset<torrents_list->size; ++tor_offset ) { |
|
|
|
|
/* Address torrents members */ |
|
|
|
|
ot_peerlist *peer_list = ( ((ot_torrent*)(torrents_list->data))[tor_offset] ).peer_list; |
|
|
|
|
ot_hash *hash =&( ((ot_torrent*)(torrents_list->data))[tor_offset] ).hash; |
|
|
|
|
const size_t byte_count = sizeof(ot_peer) * peer_list->changeset.size; |
|
|
|
|
|
|
|
|
|
/* If we reached our low watermark in buffer... */ |
|
|
|
|
if( re - r <= (ssize_t)(/* strlen( "20:" ) == */ 3 + sizeof( ot_hash ) + /* strlen_max( "%zd" ) == */ 12 + byte_count ) ) { |
|
|
|
|
|
|
|
|
|
/* crop current output buffer to the amount really used */ |
|
|
|
|
iovec_fixlast( iovec_entries, iovector, OT_SYNC_CHUNK_SIZE - ( re - r ) ); |
|
|
|
|
|
|
|
|
|
/* And allocate a fresh output buffer at the end of our buffers list */ |
|
|
|
|
if( !( r = iovec_increase( iovec_entries, iovector, OT_SYNC_CHUNK_SIZE ) ) ) { |
|
|
|
|
|
|
|
|
|
/* If this fails: free buffers */ |
|
|
|
|
iovec_free( iovec_entries, iovector ); |
|
|
|
|
|
|
|
|
|
/* Release lock on current bucket and return */ |
|
|
|
|
mutex_bucket_unlock( bucket ); |
|
|
|
|
return; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* Adjust new end of output buffer */ |
|
|
|
|
re = r + OT_SYNC_CHUNK_SIZE; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
memmove( r, "d4:syncd", 8 ); r += 8; |
|
|
|
|
for( bucket = 0; bucket < OT_BUCKET_COUNT; ++bucket ) { |
|
|
|
|
torrents_list = mutex_bucket_lock(bucket); |
|
|
|
|
for( i=0; i<torrents_list->size; ++i ) { |
|
|
|
|
ot_torrent *torrent = ((ot_torrent*)(torrents_list->data)) + i; |
|
|
|
|
const size_t byte_count = sizeof(ot_peer) * torrent->peer_list->changeset.size; |
|
|
|
|
*r++ = '2'; *r++ = '0'; *r++ = ':'; |
|
|
|
|
memmove( r, torrent->hash, sizeof( ot_hash ) ); r += sizeof( ot_hash ); |
|
|
|
|
memmove( r, hash, sizeof( ot_hash ) ); r += sizeof( ot_hash ); |
|
|
|
|
r += sprintf( r, "%zd:", byte_count ); |
|
|
|
|
memmove( r, torrent->peer_list->changeset.data, byte_count ); r += byte_count; |
|
|
|
|
memmove( r, peer_list->changeset.data, byte_count ); r += byte_count; |
|
|
|
|
} |
|
|
|
|
mutex_bucket_unlock(bucket); |
|
|
|
|
|
|
|
|
|
/* All torrents done: release lock on currenct bucket */ |
|
|
|
|
mutex_bucket_unlock( bucket ); |
|
|
|
|
} |
|
|
|
|
*r++ = 'e'; *r++ = 'e'; |
|
|
|
|
|
|
|
|
|
replysize = ( r - *reply ); |
|
|
|
|
fix_mmapallocation( *reply, allocated, replysize ); |
|
|
|
|
/* Close bencoded sync dictionary */ |
|
|
|
|
*r++='e'; *r++='e'; |
|
|
|
|
|
|
|
|
|
return replysize; |
|
|
|
|
/* Release unused memory in current output buffer */ |
|
|
|
|
iovec_fixlast( iovec_entries, iovector, OT_SYNC_CHUNK_SIZE - ( re - r ) ); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* This is the entry point into this worker thread
|
|
|
|
|
It grabs tasks from mutex_tasklist and delivers results back |
|
|
|
|
*/ |
|
|
|
|
static void * sync_worker( void * args) { |
|
|
|
|
int iovec_entries; |
|
|
|
|
struct iovec *iovector; |
|
|
|
|
|
|
|
|
|
args = args; |
|
|
|
|
|
|
|
|
|
while( 1 ) { |
|
|
|
|
ot_tasktype tasktype = TASK_SYNC_OUT; |
|
|
|
|
ot_taskid taskid = mutex_workqueue_poptask( &tasktype ); |
|
|
|
|
sync_make( &iovec_entries, &iovector ); |
|
|
|
|
if( mutex_workqueue_pushresult( taskid, iovec_entries, iovector ) ) |
|
|
|
|
iovec_free( &iovec_entries, &iovector ); |
|
|
|
|
} |
|
|
|
|
return NULL; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
static pthread_t thread_id; |
|
|
|
|
void sync_init( ) { |
|
|
|
|
pthread_create( &thread_id, NULL, sync_worker, NULL ); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void sync_deinit( ) { |
|
|
|
|
pthread_cancel( thread_id ); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void sync_deliver( int64 socket ) { |
|
|
|
|
mutex_workqueue_pushtask( socket, TASK_SYNC_OUT ); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
#endif |
|
|
|
|