/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2006, 2008 Christian Grothoff (and other contributing authors)
+ (C) 2001, 2002, 2003, 2004, 2006, 2008, 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
#include "gnunet_container_lib.h"
#include "gnunet_disk_lib.h"
+#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
+
+#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
+
+#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
+
struct GNUNET_CONTAINER_BloomFilter
{
incrementBit (char *bitArray, unsigned int bitIdx,
const struct GNUNET_DISK_FileHandle *fh)
{
- off_t fileSlot;
+ OFF_T fileSlot;
unsigned char value;
unsigned int high;
unsigned int low;
decrementBit (char *bitArray, unsigned int bitIdx,
const struct GNUNET_DISK_FileHandle *fh)
{
- off_t fileSlot;
+ OFF_T fileSlot;
unsigned char value;
unsigned int high;
unsigned int low;
* @return GNUNET_OK if created ok, GNUNET_SYSERR otherwise
*/
static int
-makeEmptyFile (const struct GNUNET_DISK_FileHandle *fh, size_t size)
+make_empty_file (const struct GNUNET_DISK_FileHandle *fh, size_t size)
{
- char *buffer;
+ char buffer[BUFFSIZE];
size_t bytesleft = size;
int res = 0;
if (GNUNET_DISK_handle_invalid (fh))
return GNUNET_SYSERR;
- buffer = GNUNET_malloc (BUFFSIZE);
- memset (buffer, 0, BUFFSIZE);
+ memset (buffer, 0, sizeof (buffer));
GNUNET_DISK_file_seek (fh, 0, GNUNET_DISK_SEEK_SET);
-
while (bytesleft > 0)
{
- if (bytesleft > BUFFSIZE)
+ if (bytesleft > sizeof (buffer))
{
- res = GNUNET_DISK_file_write (fh, buffer, BUFFSIZE);
- bytesleft -= BUFFSIZE;
+ res = GNUNET_DISK_file_write (fh, buffer, sizeof (buffer));
+ if (res >= 0)
+ bytesleft -= res;
}
else
{
res = GNUNET_DISK_file_write (fh, buffer, bytesleft);
- bytesleft = 0;
+ if (res >= 0)
+ bytesleft -= res;
}
- GNUNET_assert (res != GNUNET_SYSERR);
+ if (GNUNET_SYSERR == res)
+ return GNUNET_SYSERR;
}
- GNUNET_free (buffer);
return GNUNET_OK;
}
* @param cls closure
* @param bf the filter to manipulate
* @param bit the current bit
+ * @return GNUNET_YES to continue, GNUNET_NO to stop early
*/
-typedef void (*BitIterator) (void *cls,
- const struct GNUNET_CONTAINER_BloomFilter * bf,
- unsigned int bit);
+typedef int (*BitIterator) (void *cls,
+ const struct GNUNET_CONTAINER_BloomFilter * bf,
+ unsigned int bit);
+
/**
* Call an iterator for each bit that the bloomfilter
{
GNUNET_HashCode tmp[2];
int bitCount;
- int round;
+ unsigned int round;
unsigned int slot = 0;
bitCount = bf->addressesPerElement;
tmp[0] = *key;
round = 0;
+ GNUNET_assert (bf->bitArraySize > 0);
+ GNUNET_assert (bf->bitArraySize * 8LL > bf->bitArraySize);
while (bitCount > 0)
{
while (slot < (sizeof (GNUNET_HashCode) / sizeof (uint32_t)))
{
- callback (arg, bf,
- (((uint32_t *) & tmp[round & 1])[slot]) &
- ((bf->bitArraySize * 8) - 1));
+ if (GNUNET_YES !=
+ callback (arg, bf,
+ (((uint32_t *) & tmp[round & 1])[slot]) %
+ ((bf->bitArraySize * 8LL))))
+ return;
slot++;
bitCount--;
if (bitCount == 0)
}
}
+
/**
* Callback: increment bit
*
* @param cls pointer to writeable form of bf
* @param bf the filter to manipulate
* @param bit the bit to increment
+ * @return GNUNET_YES
*/
-static void
+static int
incrementBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit)
{
struct GNUNET_CONTAINER_BloomFilter *b = cls;
incrementBit (b->bitArray, bit, bf->fh);
+ return GNUNET_YES;
}
+
/**
* Callback: decrement bit
*
* @param cls pointer to writeable form of bf
* @param bf the filter to manipulate
* @param bit the bit to decrement
+ * @return GNUNET_YES
*/
-static void
+static int
decrementBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit)
{
struct GNUNET_CONTAINER_BloomFilter *b = cls;
decrementBit (b->bitArray, bit, bf->fh);
+ return GNUNET_YES;
}
+
/**
* Callback: test if all bits are set
*
* @param cls pointer set to GNUNET_NO if bit is not set
* @param bf the filter
* @param bit the bit to test
+ * @return YES if the bit is set, NO if not
*/
-static void
+static int
testBitCallback (void *cls, const struct GNUNET_CONTAINER_BloomFilter *bf,
unsigned int bit)
{
int *arg = cls;
if (GNUNET_NO == testBit (bf->bitArray, bit))
+ {
*arg = GNUNET_NO;
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
}
/* *********************** INTERFACE **************** */
*
* @param filename the name of the file (or the prefix)
* @param size the size of the bloom-filter (number of
- * bytes of storage space to use)
+ * bytes of storage space to use); will be rounded up
+ * to next power of 2
* @param k the number of GNUNET_CRYPTO_hash-functions to apply per
* element (number of bits set per element in the set)
* @return the bloomfilter
{
struct GNUNET_CONTAINER_BloomFilter *bf;
char *rbuff;
- off_t pos;
+ OFF_T pos;
int i;
size_t ui;
+ OFF_T fsize;
+ int must_read;
GNUNET_assert (NULL != filename);
if ((k == 0) || (size == 0))
if (size < BUFFSIZE)
size = BUFFSIZE;
ui = 1;
- while (ui < size)
+ while ( (ui < size) &&
+ (ui * 2 > ui) )
ui *= 2;
size = ui; /* make sure it's a power of 2 */
bf = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_BloomFilter));
/* Try to open a bloomfilter file */
- bf->fh =
+ if (GNUNET_YES == GNUNET_DISK_file_test (filename))
+ bf->fh =
GNUNET_DISK_file_open (filename,
- GNUNET_DISK_OPEN_READWRITE |
- GNUNET_DISK_OPEN_CREATE,
+ GNUNET_DISK_OPEN_READWRITE,
GNUNET_DISK_PERM_USER_READ |
GNUNET_DISK_PERM_USER_WRITE);
- if (NULL == bf->fh)
+ if (NULL != bf->fh)
{
- GNUNET_free (bf);
- return NULL;
+ /* file existed, try to read it! */
+ must_read = GNUNET_YES;
+ if (GNUNET_OK !=
+ GNUNET_DISK_file_handle_size (bf->fh, &fsize))
+ {
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ if (fsize == 0)
+ {
+ /* found existing empty file, just overwrite */
+ if (GNUNET_OK != make_empty_file (bf->fh, size * 4LL))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "write");
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ }
+ else if (fsize != size * 4LL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Size of file on disk is incorrect for this Bloom filter (want %llu, have %llu)\n"),
+ (unsigned long long) (size * 4LL),
+ (unsigned long long) fsize);
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ }
+ else
+ {
+ /* file did not exist, don't read, just create */
+ must_read = GNUNET_NO;
+ bf->fh =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_CREATE |
+ GNUNET_DISK_OPEN_READWRITE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL == bf->fh)
+ {
+ GNUNET_free (bf);
+ return NULL;
+ }
+ if (GNUNET_OK != make_empty_file (bf->fh, size * 4LL))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "write");
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
}
bf->filename = GNUNET_strdup (filename);
/* Alloc block */
}
bf->bitArraySize = size;
bf->addressesPerElement = k;
- memset (bf->bitArray, 0, bf->bitArraySize);
-
+ if (GNUNET_YES != must_read)
+ return bf; /* already done! */
/* Read from the file what bits we can */
rbuff = GNUNET_malloc (BUFFSIZE);
pos = 0;
- while (pos < size * 8)
+ while (pos < size * 8LL)
{
int res;
res = GNUNET_DISK_file_read (bf->fh, rbuff, BUFFSIZE);
if (res == -1)
{
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "read",
- bf->filename);
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "read", bf->filename);
+ GNUNET_free (rbuff);
+ GNUNET_free (bf->filename);
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
}
if (res == 0)
break; /* is ok! we just did not use that many bits yet */
unsigned int k)
{
struct GNUNET_CONTAINER_BloomFilter *bf;
- size_t ui;
- if ((k == 0) || (size == 0))
+ if ((0 == k) || (0 == size))
return NULL;
- ui = 1;
- while (ui < size)
- ui *= 2;
- if (size != ui)
- {
- GNUNET_break (0);
- return NULL;
- }
bf = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_BloomFilter));
bf->filename = NULL;
bf->fh = NULL;
bf->bitArray = GNUNET_malloc_large (size);
- if (bf->bitArray == NULL)
+ if (NULL == bf->bitArray)
{
GNUNET_free (bf);
return NULL;
}
bf->bitArraySize = size;
bf->addressesPerElement = k;
- if (data != NULL)
+ if (NULL != data)
memcpy (bf->bitArray, data, size);
- else
- memset (bf->bitArray, 0, bf->bitArraySize);
return bf;
}
return GNUNET_OK;
}
+
/**
* Free the space associated with a filter
* in memory, flush to drive if needed (do not
GNUNET_free (bf);
}
+
/**
* Reset a bloom filter to empty. Clears the file on disk.
*
memset (bf->bitArray, 0, bf->bitArraySize);
if (bf->filename != NULL)
- makeEmptyFile (bf->fh, bf->bitArraySize * 4);
+ make_empty_file (bf->fh, bf->bitArraySize * 4LL);
}
return res;
}
+
/**
* Add an element to the filter
*
GNUNET_CONTAINER_bloomfilter_add (struct GNUNET_CONTAINER_BloomFilter *bf,
const GNUNET_HashCode * e)
{
-
if (NULL == bf)
return;
iterateBits (bf, &incrementBitCallback, bf, e);
bf->bitArraySize = size;
bf->bitArray = GNUNET_malloc (size);
- memset (bf->bitArray, 0, bf->bitArraySize);
if (bf->filename != NULL)
- makeEmptyFile (bf->fh, bf->bitArraySize * 4);
+ make_empty_file (bf->fh, bf->bitArraySize * 4LL);
while (GNUNET_YES == iterator (iterator_cls, &hc))
GNUNET_CONTAINER_bloomfilter_add (bf, &hc);
}
projects / oweals / gnunet.git / blobdiff