GNUnet  0.19.3
gnunet-service-fs_indexing.c File Reference

program that provides indexing functions of the file-sharing service More...

#include "platform.h"
#include <float.h>
#include "gnunet_core_service.h"
#include "gnunet_datastore_service.h"
#include "gnunet_protocols.h"
#include "gnunet_signatures.h"
#include "gnunet_util_lib.h"
#include "gnunet-service-fs.h"
#include "gnunet-service-fs_indexing.h"
#include "fs.h"
Include dependency graph for gnunet-service-fs_indexing.c:

Go to the source code of this file.

Data Structures

struct  IndexInfo
 In-memory information about indexed files (also available on-disk). More...
 

Functions

static void write_index_list ()
 Write the current index information list to disk. More...
 
static void read_index_list ()
 Read index information from disk. More...
 
static void remove_cont (void *cls, int success, struct GNUNET_TIME_Absolute min_expiration, const char *msg)
 Continuation called from datastore's remove function. More...
 
int GNUNET_FS_handle_on_demand_block (const struct GNUNET_HashCode *key, uint32_t size, const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, uint32_t anonymity, uint32_t replication, struct GNUNET_TIME_Absolute expiration, uint64_t uid, GNUNET_DATASTORE_DatumProcessor cont, void *cont_cls)
 We've received an on-demand encoded block from the datastore. More...
 
void GNUNET_FS_indexing_send_list (struct GNUNET_MQ_Handle *mq)
 Transmit information about indexed files to mq. More...
 
int GNUNET_FS_indexing_do_unindex (const struct GNUNET_HashCode *fid)
 Remove a file from the index. More...
 
void GNUNET_FS_add_to_index (const char *filename, const struct GNUNET_HashCode *file_id)
 Add the given file to the list of indexed files. More...
 
void GNUNET_FS_indexing_done ()
 Shutdown the module. More...
 
int GNUNET_FS_indexing_init (const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_DATASTORE_Handle *d)
 Initialize the indexing submodule. More...
 

Variables

static struct IndexInfoindexed_files_head
 Head of linked list of indexed files. More...
 
static struct IndexInfoindexed_files_tail
 Tail of linked list of indexed files. More...
 
static struct GNUNET_CONTAINER_MultiHashMapifm
 Maps hash over content of indexed files to the respective 'struct IndexInfo'. More...
 
static const struct GNUNET_CONFIGURATION_Handlecfg
 Our configuration. More...
 
static struct GNUNET_DATASTORE_Handledsh
 Datastore handle. More...
 

Detailed Description

program that provides indexing functions of the file-sharing service

Author
Christian Grothoff

Definition in file gnunet-service-fs_indexing.c.

Function Documentation

◆ write_index_list()

static void write_index_list ( )
static

Write the current index information list to disk.

Definition at line 111 of file gnunet-service-fs_indexing.c.

112 {
113  struct GNUNET_BIO_WriteHandle *wh;
114  char *fn;
115  struct IndexInfo *pos;
116 
117  if (GNUNET_OK !=
118  GNUNET_CONFIGURATION_get_value_filename (cfg, "FS", "INDEXDB", &fn))
119  {
121  "fs",
122  "INDEXDB");
123  return;
124  }
126  if (NULL == wh)
127  {
129  _ ("Could not open `%s'.\n"),
130  fn);
131  GNUNET_free (fn);
132  return;
133  }
134  for (pos = indexed_files_head; NULL != pos; pos = pos->next)
135  if ((GNUNET_OK != GNUNET_BIO_write (wh,
136  "fs-indexing-file-id",
137  &pos->file_id,
138  sizeof(struct GNUNET_HashCode))) ||
140  "fs-indexing-filename",
141  pos->filename)))
142  break;
143  if (GNUNET_OK != GNUNET_BIO_write_close (wh, NULL))
144  {
146  _ ("Error writing `%s'.\n"),
147  fn);
148  GNUNET_free (fn);
149  return;
150  }
151  GNUNET_free (fn);
152 }
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
static struct IndexInfo * indexed_files_head
Head of linked list of indexed files.
static struct GNUNET_TESTBED_BarrierWaitHandle * wh
Our barrier wait handle.
int GNUNET_BIO_write(struct GNUNET_BIO_WriteHandle *h, const char *what, const void *buffer, size_t n)
Write a buffer to a handle.
Definition: bio.c:752
int GNUNET_BIO_write_string(struct GNUNET_BIO_WriteHandle *h, const char *what, const char *s)
Write a 0-terminated string.
Definition: bio.c:789
int GNUNET_BIO_write_close(struct GNUNET_BIO_WriteHandle *h, char **emsg)
Close an IO handle.
Definition: bio.c:556
struct GNUNET_BIO_WriteHandle * GNUNET_BIO_write_open_file(const char *fn)
Open a file for writing.
Definition: bio.c:508
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
#define GNUNET_log(kind,...)
@ GNUNET_OK
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_BULK
#define GNUNET_free(ptr)
Wrapper around free.
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
Handle for buffered writing.
Definition: bio.c:466
A 512-bit hashcode.
In-memory information about indexed files (also available on-disk).
const char * filename
Name of the indexed file.
struct IndexInfo * next
This is a doubly linked list.
struct GNUNET_HashCode file_id
Hash of the contents of the file.

References _, cfg, IndexInfo::file_id, IndexInfo::filename, GNUNET_BIO_write(), GNUNET_BIO_write_close(), GNUNET_BIO_write_open_file(), GNUNET_BIO_write_string(), GNUNET_CONFIGURATION_get_value_filename(), GNUNET_ERROR_TYPE_BULK, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_log_config_missing(), GNUNET_OK, indexed_files_head, IndexInfo::next, and wh.

Referenced by GNUNET_FS_add_to_index(), and GNUNET_FS_indexing_do_unindex().

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◆ read_index_list()

static void read_index_list ( )
static

Read index information from disk.

Definition at line 159 of file gnunet-service-fs_indexing.c.

160 {
161  struct GNUNET_BIO_ReadHandle *rh;
162  char *fn;
163  struct IndexInfo *pos;
164  char *fname;
165  struct GNUNET_HashCode hc;
166  size_t slen;
167  char *emsg;
168 
169  if (GNUNET_OK !=
170  GNUNET_CONFIGURATION_get_value_filename (cfg, "FS", "INDEXDB", &fn))
171  {
173  "fs",
174  "INDEXDB");
175  return;
176  }
177  if (GNUNET_NO == GNUNET_DISK_file_test (fn))
178  {
179  /* no index info yet */
180  GNUNET_free (fn);
181  return;
182  }
183  rh = GNUNET_BIO_read_open_file (fn);
184  if (NULL == rh)
185  {
187  _ ("Could not open `%s'.\n"),
188  fn);
189  GNUNET_free (fn);
190  return;
191  }
192  while (
193  (GNUNET_OK == GNUNET_BIO_read (rh,
194  "Hash of indexed file",
195  &hc,
196  sizeof(struct GNUNET_HashCode))) &&
197  (GNUNET_OK ==
198  GNUNET_BIO_read_string (rh, "Name of indexed file", &fname, 1024 * 16)) &&
199  (fname != NULL))
200  {
201  slen = strlen (fname) + 1;
202  pos = GNUNET_malloc (sizeof(struct IndexInfo) + slen);
203  pos->file_id = hc;
204  pos->filename = (const char *) &pos[1];
205  GNUNET_memcpy (&pos[1], fname, slen);
207  ifm,
208  &pos->file_id,
209  pos,
211  {
212  GNUNET_free (pos);
213  }
214  else
215  {
217  }
218  GNUNET_free (fname);
219  }
220  if (GNUNET_OK != GNUNET_BIO_read_close (rh, &emsg))
221  GNUNET_free (emsg);
222  GNUNET_free (fn);
223 }
static struct GNUNET_CONTAINER_MultiHashMap * ifm
Maps hash over content of indexed files to the respective 'struct IndexInfo'.
static struct IndexInfo * indexed_files_tail
Tail of linked list of indexed files.
int GNUNET_BIO_read_string(struct GNUNET_BIO_ReadHandle *h, const char *what, char **result, size_t max_length)
Read 0-terminated string.
Definition: bio.c:330
struct GNUNET_BIO_ReadHandle * GNUNET_BIO_read_open_file(const char *fn)
Open a file for reading.
Definition: bio.c:114
int GNUNET_BIO_read_close(struct GNUNET_BIO_ReadHandle *h, char **emsg)
Close an open handle.
Definition: bio.c:162
int GNUNET_BIO_read(struct GNUNET_BIO_ReadHandle *h, const char *what, void *result, size_t len)
Read some contents into a buffer.
Definition: bio.c:291
enum GNUNET_GenericReturnValue GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory).
Definition: disk.c:481
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY
There must only be one value per key; storing a value should fail if a value under the same key alrea...
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_NO
@ GNUNET_SYSERR
#define GNUNET_malloc(size)
Wrapper around malloc.
Handle for buffered reading.
Definition: bio.c:69

References _, cfg, IndexInfo::file_id, IndexInfo::filename, GNUNET_BIO_read(), GNUNET_BIO_read_close(), GNUNET_BIO_read_open_file(), GNUNET_BIO_read_string(), GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_DISK_file_test(), GNUNET_ERROR_TYPE_BULK, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_log_config_missing(), GNUNET_malloc, GNUNET_memcpy, GNUNET_NO, GNUNET_OK, GNUNET_SYSERR, ifm, indexed_files_head, and indexed_files_tail.

Referenced by GNUNET_FS_indexing_init().

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◆ remove_cont()

static void remove_cont ( void *  cls,
int  success,
struct GNUNET_TIME_Absolute  min_expiration,
const char *  msg 
)
static

Continuation called from datastore's remove function.

Parameters
clsunused
successdid the deletion work?
min_expirationminimum expiration time required for content to be stored
msgerror message

Definition at line 236 of file gnunet-service-fs_indexing.c.

240 {
241  if (GNUNET_OK != success)
243  _ ("Failed to delete bogus block: %s\n"),
244  msg);
245 }
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
@ GNUNET_ERROR_TYPE_WARNING

References _, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_OK, and msg.

Referenced by GNUNET_FS_handle_on_demand_block().

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◆ GNUNET_FS_handle_on_demand_block()

int GNUNET_FS_handle_on_demand_block ( const struct GNUNET_HashCode key,
uint32_t  size,
const void *  data,
enum GNUNET_BLOCK_Type  type,
uint32_t  priority,
uint32_t  anonymity,
uint32_t  replication,
struct GNUNET_TIME_Absolute  expiration,
uint64_t  uid,
GNUNET_DATASTORE_DatumProcessor  cont,
void *  cont_cls 
)

We've received an on-demand encoded block from the datastore.

Attempt to do on-demand encoding and (if successful), call the continuation with the resulting block. On error, clean up and ask the datastore for more results.

Parameters
keykey for the content
sizenumber of bytes in data
datacontent stored
typetype of the content
prioritypriority of the content
anonymityanonymity-level for the content
replicationreplication-level for the content
expirationexpiration time for the content
uidunique identifier for the datum; maybe 0 if no unique identifier is available
contfunction to call with the actual block (at most once, on success)
cont_clsclosure for cont
Returns
GNUNET_OK on success

Definition at line 249 of file gnunet-service-fs_indexing.c.

260 {
261  const struct OnDemandBlock *odb;
262  struct GNUNET_HashCode nkey;
265  struct GNUNET_HashCode query;
266  ssize_t nsize;
267  char ndata[DBLOCK_SIZE];
268  char edata[DBLOCK_SIZE];
269  const char *fn;
270  struct GNUNET_DISK_FileHandle *fh;
271  uint64_t off;
272  struct IndexInfo *ii;
273 
274  if (size != sizeof(struct OnDemandBlock))
275  {
276  GNUNET_break (0);
277  GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1, &remove_cont, NULL);
278  return GNUNET_SYSERR;
279  }
280  odb = (const struct OnDemandBlock *) data;
281  off = GNUNET_ntohll (odb->offset);
283  if (NULL == ii)
284  {
285  GNUNET_break (0);
287  "Failed to find index %s\n",
288  GNUNET_h2s (&odb->file_id));
289  return GNUNET_SYSERR;
290  }
291  fn = ii->filename;
292  if ((NULL == fn) || (0 != access (fn, R_OK)))
293  {
295  GSF_stats,
296  gettext_noop ("# index blocks removed: original file inaccessible"),
297  1,
298  GNUNET_YES);
299  GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1, &remove_cont, NULL);
300  return GNUNET_SYSERR;
301  }
302  if ((NULL == (fh = GNUNET_DISK_file_open (fn,
305  (off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)) ||
306  (-1 == (nsize = GNUNET_DISK_file_read (fh, ndata, sizeof(ndata)))))
307  {
309  _ (
310  "Could not access indexed file `%s' (%s) at offset %llu: %s\n"),
311  GNUNET_h2s (&odb->file_id),
312  fn,
313  (unsigned long long) off,
314  (fn == NULL) ? _ ("not indexed") : strerror (errno));
315  if (fh != NULL)
317  GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1, &remove_cont, NULL);
318  return GNUNET_SYSERR;
319  }
321  GNUNET_CRYPTO_hash (ndata, nsize, &nkey);
322  GNUNET_CRYPTO_hash_to_aes_key (&nkey, &skey, &iv);
323  GNUNET_CRYPTO_symmetric_encrypt (ndata, nsize, &skey, &iv, edata);
324  GNUNET_CRYPTO_hash (edata, nsize, &query);
325  if (0 != memcmp (&query, key, sizeof(struct GNUNET_HashCode)))
326  {
328  _ ("Indexed file `%s' changed at offset %llu\n"),
329  fn,
330  (unsigned long long) off);
331  GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1, &remove_cont, NULL);
332  return GNUNET_SYSERR;
333  }
335  "On-demand encoded block for query `%s'\n",
336  GNUNET_h2s (key));
337  cont (cont_cls,
338  key,
339  nsize,
340  edata,
342  priority,
343  anonymity,
344  replication,
345  expiration,
346  uid);
347  return GNUNET_OK;
348 }
@ GNUNET_BLOCK_TYPE_FS_DBLOCK
Data block (leaf) in the CHK tree.
#define DBLOCK_SIZE
Size of the individual blocks used for file-sharing.
Definition: fs.h:41
#define gettext_noop(String)
Definition: gettext.h:70
static char * expiration
Credential TTL.
Definition: gnunet-abd.c:96
static unsigned int replication
struct GNUNET_HashCode key
The key used in the DHT.
static unsigned int anonymity
uint32_t data
The data value.
struct GNUNET_STATISTICS_Handle * GSF_stats
Handle for reporting statistics.
static void remove_cont(void *cls, int success, struct GNUNET_TIME_Absolute min_expiration, const char *msg)
Continuation called from datastore's remove function.
static struct GNUNET_DATASTORE_Handle * dsh
Datastore handle.
static struct GNUNET_DISK_FileHandle * fh
File handle to STDIN, for reading restart/quit commands.
ssize_t GNUNET_CRYPTO_symmetric_encrypt(const void *block, size_t size, const struct GNUNET_CRYPTO_SymmetricSessionKey *sessionkey, const struct GNUNET_CRYPTO_SymmetricInitializationVector *iv, void *result)
Encrypt a block using a symmetric sessionkey.
struct GNUNET_DATASTORE_QueueEntry * GNUNET_DATASTORE_remove(struct GNUNET_DATASTORE_Handle *h, const struct GNUNET_HashCode *key, size_t size, const void *data, unsigned int queue_priority, unsigned int max_queue_size, GNUNET_DATASTORE_ContinuationWithStatus cont, void *cont_cls)
Explicitly remove some content from the database.
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1234
off_t GNUNET_DISK_file_seek(const struct GNUNET_DISK_FileHandle *h, off_t offset, enum GNUNET_DISK_Seek whence)
Move the read/write pointer in a file.
Definition: disk.c:205
enum GNUNET_GenericReturnValue GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1305
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:621
@ GNUNET_DISK_OPEN_READ
Open the file for reading.
@ GNUNET_DISK_PERM_NONE
Nobody is allowed to do anything to the file.
@ GNUNET_DISK_SEEK_SET
Seek an absolute position (from the start of the file).
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
void GNUNET_CRYPTO_hash_to_aes_key(const struct GNUNET_HashCode *hc, struct GNUNET_CRYPTO_SymmetricSessionKey *skey, struct GNUNET_CRYPTO_SymmetricInitializationVector *iv)
Convert a hashcode into a key.
Definition: crypto_hash.c:151
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:54
@ GNUNET_YES
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_DEBUG
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
static unsigned int size
Size of the "table".
Definition: peer.c:68
Handle used to access files (and pipes).
index block (indexing a DBlock that can be obtained directly from reading the plaintext file)
Definition: block_fs.h:86
uint64_t offset
At which offset should we be able to find this on-demand encoded block? (in NBO)
Definition: block_fs.h:98
struct GNUNET_HashCode file_id
Hash code of the entire content of the file that was indexed (used to uniquely identify the plaintext...
Definition: block_fs.h:92

References _, anonymity, data, DBLOCK_SIZE, dsh, expiration, fh, OnDemandBlock::file_id, IndexInfo::filename, gettext_noop, GNUNET_BLOCK_TYPE_FS_DBLOCK, GNUNET_break, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_to_aes_key(), GNUNET_CRYPTO_symmetric_encrypt(), GNUNET_DATASTORE_remove(), GNUNET_DISK_file_close(), GNUNET_DISK_file_open(), GNUNET_DISK_file_read(), GNUNET_DISK_file_seek(), GNUNET_DISK_OPEN_READ, GNUNET_DISK_PERM_NONE, GNUNET_DISK_SEEK_SET, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_h2s(), GNUNET_log, GNUNET_ntohll(), GNUNET_OK, GNUNET_STATISTICS_update(), GNUNET_SYSERR, GNUNET_YES, GSF_stats, ifm, key, OnDemandBlock::offset, remove_cont(), replication, and size.

Referenced by handle_datastore_reply(), process_local_reply(), and process_migration_content().

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◆ GNUNET_FS_indexing_send_list()

void GNUNET_FS_indexing_send_list ( struct GNUNET_MQ_Handle mq)

Transmit information about indexed files to mq.

Parameters
mqmessage queue to send information to

Definition at line 357 of file gnunet-service-fs_indexing.c.

358 {
359  struct GNUNET_MQ_Envelope *env;
360  struct IndexInfoMessage *iim;
361  struct GNUNET_MessageHeader *iem;
362  size_t slen;
363  const char *fn;
364  struct IndexInfo *pos;
365 
366  for (pos = indexed_files_head; NULL != pos; pos = pos->next)
367  {
368  fn = pos->filename;
369  slen = strlen (fn) + 1;
370  if (slen + sizeof(struct IndexInfoMessage) >= GNUNET_MAX_MESSAGE_SIZE)
371  {
372  GNUNET_break (0);
373  break;
374  }
375  env =
377  iim->reserved = 0;
378  iim->file_id = pos->file_id;
379  GNUNET_memcpy (&iim[1], fn, slen);
380  GNUNET_MQ_send (mq, env);
381  }
383  GNUNET_MQ_send (mq, env);
384 }
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message,...
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:304
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct.
Definition: gnunet_mq_lib.h:62
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:77
#define GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_ENTRY
Reply to client with an indexed file name.
#define GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_END
Reply to client indicating end of list.
Header for all communications.
Message send by FS service in response to a request asking for a list of all indexed files.
Definition: fs.h:197
struct GNUNET_HashCode file_id
Hash of the indexed file.
Definition: fs.h:212
uint32_t reserved
Always zero.
Definition: fs.h:207

References env, IndexInfoMessage::file_id, IndexInfo::file_id, IndexInfo::filename, GNUNET_break, GNUNET_MAX_MESSAGE_SIZE, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_END, GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_ENTRY, GNUNET_MQ_msg, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), indexed_files_head, mq, IndexInfo::next, and IndexInfoMessage::reserved.

Referenced by handle_client_index_list_get().

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◆ GNUNET_FS_indexing_do_unindex()

int GNUNET_FS_indexing_do_unindex ( const struct GNUNET_HashCode fid)

Remove a file from the index.

Parameters
fididentifier of the file to remove
Returns
GNUNET_YES if the fid was found

Definition at line 394 of file gnunet-service-fs_indexing.c.

395 {
396  struct IndexInfo *pos;
397 
398  for (pos = indexed_files_head; NULL != pos; pos = pos->next)
399  {
400  if (0 == memcmp (&pos->file_id, fid, sizeof(struct GNUNET_HashCode)))
401  {
403  GNUNET_break (
404  GNUNET_OK ==
406  GNUNET_free (pos);
407  write_index_list ();
408  return GNUNET_YES;
409  }
410  }
411  return GNUNET_NO;
412 }
static void write_index_list()
Write the current index information list to disk.
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_remove(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Remove the given key-value pair from the map.

References IndexInfo::file_id, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_multihashmap_remove(), GNUNET_free, GNUNET_NO, GNUNET_OK, GNUNET_YES, ifm, indexed_files_head, indexed_files_tail, IndexInfo::next, and write_index_list().

Referenced by handle_client_unindex().

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◆ GNUNET_FS_add_to_index()

void GNUNET_FS_add_to_index ( const char *  filename,
const struct GNUNET_HashCode file_id 
)

Add the given file to the list of indexed files.

Parameters
filenamename of the file
file_idhash identifier for filename

Definition at line 422 of file gnunet-service-fs_indexing.c.

424 {
425  struct IndexInfo *ii;
426  size_t slen;
427 
429  if (NULL != ii)
430  {
431  GNUNET_log (
433  _ (
434  "Index request received for file `%s' is already indexed as `%s'. Permitting anyway.\n"),
435  filename,
436  ii->filename);
437  return;
438  }
440  "Adding file %s to index as %s\n",
441  filename,
442  GNUNET_h2s (file_id));
443  slen = strlen (filename) + 1;
444  ii = GNUNET_malloc (sizeof(struct IndexInfo) + slen);
445  ii->file_id = *file_id;
446  ii->filename = (const char *) &ii[1];
447  GNUNET_memcpy (&ii[1], filename, slen);
451  ifm,
452  &ii->file_id,
453  ii,
455  write_index_list ();
456 }
static char * filename
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
@ GNUNET_ERROR_TYPE_INFO

References _, IndexInfo::file_id, filename, IndexInfo::filename, GNUNET_assert, GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_INFO, GNUNET_h2s(), GNUNET_log, GNUNET_malloc, GNUNET_memcpy, GNUNET_OK, ifm, indexed_files_head, indexed_files_tail, and write_index_list().

Referenced by signal_index_ok().

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◆ GNUNET_FS_indexing_done()

void GNUNET_FS_indexing_done ( void  )

Shutdown the module.

Definition at line 463 of file gnunet-service-fs_indexing.c.

464 {
465  struct IndexInfo *pos;
466 
467  while (NULL != (pos = indexed_files_head))
468  {
470  if (pos->fhc != NULL)
472  GNUNET_break (
473  GNUNET_OK ==
475  GNUNET_free (pos);
476  }
478  ifm = NULL;
479  cfg = NULL;
480 }
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
void GNUNET_CRYPTO_hash_file_cancel(struct GNUNET_CRYPTO_FileHashContext *fhc)
Cancel a file hashing operation.
struct GNUNET_CRYPTO_FileHashContext * fhc
Context for hashing of the file.

References cfg, IndexInfo::fhc, IndexInfo::file_id, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_CRYPTO_hash_file_cancel(), GNUNET_free, GNUNET_OK, ifm, indexed_files_head, and indexed_files_tail.

Referenced by shutdown_task().

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◆ GNUNET_FS_indexing_init()

int GNUNET_FS_indexing_init ( const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_DATASTORE_Handle d 
)

Initialize the indexing submodule.

Parameters
cconfiguration to use
ddatastore to use
Returns
GNUNET_OK on success

Definition at line 484 of file gnunet-service-fs_indexing.c.

486 {
487  cfg = c;
488  dsh = d;
490  read_index_list ();
491  return GNUNET_OK;
492 }
static void read_index_list()
Read index information from disk.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.

References cfg, dsh, GNUNET_CONTAINER_multihashmap_create(), GNUNET_OK, GNUNET_YES, ifm, and read_index_list().

Referenced by run().

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Variable Documentation

◆ indexed_files_head

struct IndexInfo* indexed_files_head
static

Head of linked list of indexed files.

FIXME: we don't need both a DLL and a hashmap here!

Definition at line 81 of file gnunet-service-fs_indexing.c.

Referenced by GNUNET_FS_add_to_index(), GNUNET_FS_indexing_do_unindex(), GNUNET_FS_indexing_done(), GNUNET_FS_indexing_send_list(), read_index_list(), and write_index_list().

◆ indexed_files_tail

struct IndexInfo* indexed_files_tail
static

Tail of linked list of indexed files.

Definition at line 86 of file gnunet-service-fs_indexing.c.

Referenced by GNUNET_FS_add_to_index(), GNUNET_FS_indexing_do_unindex(), GNUNET_FS_indexing_done(), and read_index_list().

◆ ifm

struct GNUNET_CONTAINER_MultiHashMap* ifm
static

Maps hash over content of indexed files to the respective 'struct IndexInfo'.

The filenames are pointers into the indexed_files linked list and do not need to be freed.

Definition at line 93 of file gnunet-service-fs_indexing.c.

Referenced by GNUNET_FS_add_to_index(), GNUNET_FS_handle_on_demand_block(), GNUNET_FS_indexing_do_unindex(), GNUNET_FS_indexing_done(), GNUNET_FS_indexing_init(), and read_index_list().

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

◆ dsh

struct GNUNET_DATASTORE_Handle* dsh
static

Datastore handle.

Created and destroyed by code in gnunet-service-fs (this is an alias).

Definition at line 104 of file gnunet-service-fs_indexing.c.

Referenced by GNUNET_FS_handle_on_demand_block(), GNUNET_FS_indexing_init(), GNUNET_FS_publish_start(), and GNUNET_FS_publish_ublock_().