Fullscrape is thread safe now.

1 files changed, 67 insertions, 0 deletions

diff --git a/ot_fullscrape.c b/ot_fullscrape.c
new file mode 100644
index 0000000..0571049
--- /dev/null
+++ b/ot_fullscrape.c
@@ -0,0 +1,67 @@
+/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
+   It is considered beerware. Prost. Skol. Cheers or whatever. */
+
+/* System */
+#include <sys/uio.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Libowfat */
+
+/* Opentracker */
+#include "trackerlogic.h"
+#include "ot_mutex.h"
+#include "ot_iovec.h"
+#include "ot_fullscrape.h"
+
+/* Fetch full scrape info for all torrents
+   Full scrapes usually are huge and one does not want to
+   allocate more memory. So lets get them in 1M units
+*/
+#define OT_SCRAPE_CHUNK_SIZE (256*1024)
+
+/* "d8:completei%zde10:downloadedi%zde10:incompletei%zdee" */
+#define OT_FULLSCRAPE_MAXENTRYLEN 100
+
+size_t return_fullscrape_for_tracker( int *iovec_entries, struct iovec **iovector ) {
+  int    bucket;
+  size_t j;
+  char  *r, *re;
+
+  *iovec_entries = 0;
+  if( !( r = iovec_increase( iovec_entries, iovector, OT_SCRAPE_CHUNK_SIZE ) ) )
+    return 0;
+  re = r + OT_SCRAPE_CHUNK_SIZE;
+
+  memmove( r, "d5:filesd", 9 ); r += 9;
+  for( bucket=0; bucket<OT_BUCKET_COUNT; ++bucket ) {
+    ot_vector *torrents_list = mutex_bucket_lock( bucket );
+    for( j=0; j<torrents_list->size; ++j ) {
+      ot_peerlist *peer_list = ( ((ot_torrent*)(torrents_list->data))[j] ).peer_list;
+      ot_hash     *hash      =&( ((ot_torrent*)(torrents_list->data))[j] ).hash;
+      if( peer_list->peer_count || peer_list->down_count ) {
+        *r++='2'; *r++='0'; *r++=':';
+        memmove( r, hash, 20 ); r+=20;
+        r += sprintf( r, "d8:completei%zde10:downloadedi%zde10:incompletei%zdee", peer_list->seed_count, peer_list->down_count, peer_list->peer_count-peer_list->seed_count );
+      }
+
+      if( re - r <= OT_FULLSCRAPE_MAXENTRYLEN ) {
+        iovec_fixlast( iovec_entries, iovector, OT_SCRAPE_CHUNK_SIZE - ( re - r ) );
+        if( !( r = iovec_increase( iovec_entries, iovector, OT_SCRAPE_CHUNK_SIZE ) ) ) {
+          iovec_free( iovec_entries, iovector );
+          mutex_bucket_unlock( bucket );
+          return 0;
+        }
+        re = r + OT_SCRAPE_CHUNK_SIZE;
+      }
+        
+    }
+    mutex_bucket_unlock( bucket );
+  }
+
+  *r++='e'; *r++='e';
+
+  iovec_fixlast( iovec_entries, iovector, OT_SCRAPE_CHUNK_SIZE - ( re - r ) );
+
+  return iovec_length( iovec_entries, iovector );
+}