GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
Boston, MA 02111-1307, USA.
*/
+/**
+ * @file fs/fs_dirmetascan.c
+ * @brief code to asynchronously build a 'struct GNUNET_FS_ShareTreeItem'
+ * from an on-disk directory for publishing; use the 'gnunet-helper-fs-publish'.
+ * @author LRN
+ * @author Christian Grothoff
+ */
#include "platform.h"
#include "gnunet_fs_service.h"
#include "gnunet_scheduler_lib.h"
#include <pthread.h>
-/**
- * Entry for each unique keyword to track how often
- * it occured. Contains the keyword and the counter.
- */
-struct KeywordCounter
-{
-
- /**
- * Keyword that was found.
- */
- const char *value;
-
- /**
- * How many files have this keyword?
- */
- unsigned int count;
-
- /**
- * This is a doubly-linked list
- */
- struct KeywordCounter *prev;
-
- /**
- * This is a doubly-linked list
- */
- struct KeywordCounter *next;
-};
/**
- * Aggregate information we keep for meta data in each directory.
+ * An opaque structure a pointer to which is returned to the
+ * caller to be used to control the scanner.
*/
-struct MetaCounter
+struct GNUNET_FS_DirScanner
{
- /**
- * The actual meta data.
- */
- const char *data;
/**
- * Number of bytes in 'data'.
+ * Helper process.
*/
- size_t data_size;
+ struct GNUNET_HELPER_Handle *helper;
/**
- * Name of the plugin that provided that piece of metadata
- */
- const char *plugin_name;
-
- /**
- * Type of the data
- */
- enum EXTRACTOR_MetaType type;
-
- /**
- * Format of the data
- */
- enum EXTRACTOR_MetaFormat format;
-
- /**
- * MIME-type of the metadata itself
- */
- const char *data_mime_type;
-
- /**
- * How many files have meta entries matching this value?
- * (type and format do not have to match).
- */
- unsigned int count;
-
- /**
- * This is a doubly-linked list
+ * Expanded filename (as given by the scan initiator).
+ * The scanner thread stores a copy here, and frees it when it finishes.
*/
- struct MetaCounter *prev;
+ char *filename_expanded;
/**
- * This is a doubly-linked list
+ * Second argument to helper process.
*/
- struct MetaCounter *next;
-};
-
-struct AddDirContext;
-
-/**
- * A structure used to hold a pointer to the tree item that is being
- * processed.
- * Needed to avoid changing the context for every recursive call.
- */
-struct AddDirStack
-{
+ char *ex_arg;
+
/**
- * Context pointer
+ * The function that will be called every time there's a progress
+ * message.
*/
- struct AddDirContext *adc;
-
+ GNUNET_FS_DirScannerProgressCallback progress_callback;
+
/**
- * Parent directory
+ * A closure for progress_callback.
*/
- struct GNUNET_FS_ShareTreeItem *parent;
-};
+ void *progress_callback_cls;
-/**
- * Execution context for 'add_dir'
- * Owned by the initiator thread.
- */
-struct AddDirContext
-{
/**
* After the scan is finished, it will contain a pointer to the
* top-level directory entry in the directory tree built by the
- * scanner.
+ * scanner.
*/
struct GNUNET_FS_ShareTreeItem *toplevel;
/**
- * Expanded filename (as given by the scan initiator).
- * The scanner thread stores a copy here, and frees it when it finishes.
+ * Current position during processing.
*/
- char *filename_expanded;
+ struct GNUNET_FS_ShareTreeItem *pos;
/**
- * A pipe end to read signals from.
- * Owned by the initiator thread.
+ * Task scheduled when we are done.
*/
- const struct GNUNET_DISK_FileHandle *stop_read;
+ GNUNET_SCHEDULER_TaskIdentifier stop_task;
/**
- * 1 if the scanner should stop, 0 otherwise. Set in response
- * to communication errors or when the initiator wants the scanning
- * process to stop.
+ * Arguments for helper.
*/
- char do_stop;
-
- /**
- * Handle of the pipe end into which the progress messages are written
- * The pipe is owned by the initiator thread, and there's no way to
- * close this end without having access to the pipe, so it won't
- * be closed by the scanner thread.
- * The initiator MUST keep it alive until the scanner thread is finished.
- */
- const struct GNUNET_DISK_FileHandle *progress_write;
-
+ char *args[4];
- /**
- * List of libextractor plugins to use for extracting.
- * Initialized when the scan starts, removed when it finishes.
- */
- struct EXTRACTOR_PluginList *plugins;
};
-/**
- * An opaque structure a pointer to which is returned to the
- * caller to be used to control the scanner.
- */
-struct GNUNET_FS_DirScanner
-{
- /**
- * A pipe end to read signals from.
- * Owned by the initiator thread.
- */
- const struct GNUNET_DISK_FileHandle *stop_write;
-
- /**
- * A pipe transfer signals to the scanner.
- * Owned by the initiator thread.
- */
- struct GNUNET_DISK_PipeHandle *stop_pipe;
-
- /**
- * A thread object for the scanner thread.
- * Owned by the initiator thread.
- */
-#if WINDOWS
- HANDLE thread;
-#else
- pthread_t thread;
-#endif
-
- /**
- * A task for reading progress messages from the scanner.
- */
- GNUNET_SCHEDULER_TaskIdentifier progress_read_task;
-
- /**
- * The end of the pipe that is used to read progress messages.
- */
- const struct GNUNET_DISK_FileHandle *progress_read;
-
- /**
- * The pipe that is used to read progress messages.
- * Owned (along with both of its ends) by the initiator thread.
- * Only closed after the scanner thread is finished.
- */
- struct GNUNET_DISK_PipeHandle *progress_pipe;
-
- /**
- * The function that will be called every time there's a progress
- * message.
- */
- GNUNET_FS_DirScannerProgressCallback progress_callback;
-
- /**
- * A closure for progress_callback.
- */
- void *cls;
- /**
- * A pointer to the context of the scanner.
- * Owned by the initiator thread.
- * Initiator thread shouldn't touch it until the scanner thread
- * is finished.
- */
- struct AddDirContext *adc;
-};
/**
- * A structure that forms a singly-linked list that serves as a stack
- * for metadata-processing function.
+ * Abort the scan. Must not be called from within the progress_callback
+ * function.
+ *
+ * @param ds directory scanner structure
*/
-struct ProcessMetadataStackItem
+void
+GNUNET_FS_directory_scan_abort (struct GNUNET_FS_DirScanner *ds)
{
- /**
- * A pointer to metadata-processing context.
- * The same in every stack item.
- */
- struct GNUNET_FS_ProcessMetadataContext *ctx;
-
- /**
- * This is a singly-linked list. A pointer to its end is kept, and
- * this pointer is used to walk it backwards.
- */
- struct ProcessMetadataStackItem *parent;
-
- /**
- * Map from the hash over the keyword to an 'struct KeywordCounter *'
- * counter that says how often this keyword was
- * encountered in the current directory.
- */
- struct GNUNET_CONTAINER_MultiHashMap *keywordcounter;
-
- /**
- * Map from the hash over the metadata to an 'struct MetaCounter *'
- * counter that says how often this metadata was
- * encountered in the current directory.
- */
- struct GNUNET_CONTAINER_MultiHashMap *metacounter;
-
- /**
- * Number of files in the current directory.
- */
- unsigned int dir_entry_count;
-
- /**
- * Keywords to exclude from using for KSK since they'll be associated
- * with the parent as well. NULL for nothing blocked.
- */
- struct GNUNET_FS_Uri *exclude_ksk;
-
- /**
- * A share tree item that is being processed.
- */
- struct GNUNET_FS_ShareTreeItem *item;
-
- /**
- * Set to GNUNET_YES to indicate that the directory pointer by 'item'
- * was processed, and we should move on to the next.
- * Otherwise the directory will be recursed into.
- */
- int end_directory;
+ /* terminate helper */
+ if (NULL != ds->helper)
+ GNUNET_HELPER_stop (ds->helper, GNUNET_NO);
+
+ /* free resources */
+ if (NULL != ds->toplevel)
+ GNUNET_FS_share_tree_free (ds->toplevel);
+ if (GNUNET_SCHEDULER_NO_TASK != ds->stop_task)
+ GNUNET_SCHEDULER_cancel (ds->stop_task);
+ GNUNET_free_non_null (ds->ex_arg);
+ GNUNET_free (ds->filename_expanded);
+ GNUNET_free (ds);
+}
-};
/**
- * The structure to keep the state of metadata processing
+ * Obtain the result of the scan after the scan has signalled
+ * completion. Must not be called prior to completion. The 'ds' is
+ * freed as part of this call.
+ *
+ * @param ds directory scanner structure
+ * @return the results of the scan (a directory tree)
*/
-struct GNUNET_FS_ProcessMetadataContext
+struct GNUNET_FS_ShareTreeItem *
+GNUNET_FS_directory_scan_get_result (struct GNUNET_FS_DirScanner *ds)
{
- /**
- * The top of the stack.
- */
- struct ProcessMetadataStackItem *stack;
-
- /**
- * Callback to invoke when processing is finished
- */
- GNUNET_SCHEDULER_Task cb;
-
- /**
- * Closure for 'cb'
- */
- void *cls;
-
- /**
- * Toplevel directory item of the tree to process.
- */
- struct GNUNET_FS_ShareTreeItem *toplevel;
-};
+ struct GNUNET_FS_ShareTreeItem *result;
-/**
- * Called every now and then by the scanner.
- * Checks the synchronization privitive.
- * Returns 1 if the scanner should stop, 0 otherwise.
- */
-static int
-should_stop (struct AddDirContext *adc)
-{
- errno = 0;
- char c;
- if (GNUNET_DISK_file_read_non_blocking (adc->stop_read, &c, 1) == 1
- || errno != EAGAIN)
- {
- adc->do_stop = 1;
- }
- return adc->do_stop;
+ /* check that we're actually done */
+ GNUNET_assert (NULL == ds->helper);
+ /* preserve result */
+ result = ds->toplevel;
+ ds->toplevel = NULL;
+ GNUNET_FS_directory_scan_abort (ds);
+ return result;
}
+
/**
- * Write progress message.
- * Format is:
- * <reason><filename length><filename><directory flag>
- * If filename is NULL, filename is not written, and its length
- * is written as 0, and nothing else is written. It signals the initiator
- * thread that the scanner is finished, and that it can now join its thread.
+ * Move in the directory from the given position to the next file
+ * in DFS traversal.
*
- * Also checks if the initiator thread wants the scanner to stop,
- * Returns 1 to stop scanning (if the signal was received, or
- * if the pipe was broken somehow), 0 otherwise.
+ * @param pos current position
+ * @return next file, NULL for none
*/
-static int
-write_progress (struct AddDirContext *adc, const char *filename,
- char is_directory, enum GNUNET_FS_DirScannerProgressUpdateReason reason)
+static struct GNUNET_FS_ShareTreeItem *
+advance (struct GNUNET_FS_ShareTreeItem *pos)
{
- size_t filename_len;
- ssize_t wr;
- size_t total_write;
- if ((adc->do_stop || should_stop (adc)) && reason != GNUNET_DIR_SCANNER_ASKED_TO_STOP
- && reason != GNUNET_DIR_SCANNER_FINISHED)
- return 1;
- total_write = 0;
- wr = 1;
- while ((wr > 0 || errno == EAGAIN) && total_write < sizeof (reason))
- {
- wr = GNUNET_DISK_file_write_blocking (adc->progress_write,
- &((char *)&reason)[total_write], sizeof (reason) - total_write);
- if (wr > 0)
- total_write += wr;
- }
- if (sizeof (reason) != total_write)
- return adc->do_stop = 1;
- if (filename)
- filename_len = strlen (filename) + 1;
- else
- filename_len = 0;
- total_write = 0;
- wr = 1;
- while ((wr > 0 || errno == EAGAIN) && total_write < sizeof (size_t))
- {
- wr = GNUNET_DISK_file_write_blocking (adc->progress_write,
- &((char *)&filename_len)[total_write], sizeof (size_t) - total_write);
- if (wr > 0)
- total_write += wr;
- }
- if (sizeof (size_t) != total_write)
- return adc->do_stop = 1;
- if (filename)
+ int moved;
+
+ GNUNET_assert (NULL != pos);
+ moved = 0; /* must not terminate, even on file, otherwise "normal" */
+ while ( (pos->is_directory == GNUNET_YES) ||
+ (0 == moved) )
{
- total_write = 0;
- wr = 1;
- while ((wr > 0 || errno == EAGAIN) && total_write < filename_len)
- {
- wr = GNUNET_DISK_file_write_blocking (adc->progress_write,
- &((char *)filename)[total_write], filename_len - total_write);
- if (wr > 0)
- total_write += wr;
- }
- if (filename_len != total_write)
- return adc->do_stop = 1;
- total_write = 0;
- wr = 1;
- while ((wr > 0 || errno == EAGAIN) && total_write < sizeof (char))
+ if ( (moved != -1) &&
+ (NULL != pos->children_head) )
{
- wr = GNUNET_DISK_file_write_blocking (adc->progress_write,
- &((char *)&is_directory)[total_write], sizeof (char) - total_write);
- if (wr > 0)
- total_write += wr;
+ pos = pos->children_head;
+ moved = 1; /* can terminate if file */
+ continue;
}
- if (sizeof (char) != total_write)
- return adc->do_stop = 1;
- }
- return 0;
-}
-
-/**
- * Add the given keyword to the
- * keyword statistics tracker.
- *
- * @param cls closure (user-defined)
- * @param keyword the keyword to count
- * @param is_mandatory ignored
- * @return always GNUNET_OK
- */
-static int
-add_to_keyword_counter (void *cls, const char *keyword, int is_mandatory)
-{
- struct GNUNET_CONTAINER_MultiHashMap *mcm = cls;
- struct KeywordCounter *cnt, *first_cnt;
- GNUNET_HashCode hc;
- size_t klen;
-
- klen = strlen (keyword) + 1;
- GNUNET_CRYPTO_hash (keyword, klen - 1, &hc);
- /* Since the map might contain multiple values per keyword, we only
- * store one value, and attach all other to it, forming a linked list.
- * Somewhat easier than retrieving multiple items via callback.
- */
- first_cnt = GNUNET_CONTAINER_multihashmap_get (mcm, &hc);
- for (cnt = first_cnt; cnt && strcmp (cnt->value, keyword) != 0; cnt = cnt->next);
- if (cnt == NULL)
- {
- cnt = GNUNET_malloc (sizeof (struct KeywordCounter) + klen);
- cnt->value = (const char *) &cnt[1];
- memcpy (&cnt[1], keyword, klen);
- if (first_cnt != NULL)
+ if (NULL != pos->next)
{
- if (first_cnt->prev != NULL)
- {
- first_cnt->prev->next = cnt;
- cnt->prev = first_cnt->prev;
- }
- first_cnt->prev = cnt;
- cnt->next = first_cnt;
+ pos = pos->next;
+ moved = 1; /* can terminate if file */
+ continue;
}
- else
- GNUNET_CONTAINER_multihashmap_put (mcm, &hc, cnt,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- }
- cnt->count++;
- return GNUNET_OK;
-}
-
-/**
- * Type of a function that libextractor calls for each
- * meta data item found.
- *
- * @param cls the container multihashmap to update
- * @param plugin_name name of the plugin that produced this value;
- * special values can be used (i.e. '<zlib>' for zlib being
- * used in the main libextractor library and yielding
- * meta data).
- * @param type libextractor-type describing the meta data
- * @param format basic format information about data
- * @param data_mime_type mime-type of data (not of the original file);
- * can be NULL (if mime-type is not known)
- * @param data actual meta-data found
- * @param data_len number of bytes in data
- * @return GNUNET_OK to continue extracting / iterating
- */
-static int
-add_to_meta_counter (void *cls, const char *plugin_name,
- enum EXTRACTOR_MetaType type, enum EXTRACTOR_MetaFormat format,
- const char *data_mime_type, const char *data, size_t data_len)
-{
- struct GNUNET_CONTAINER_MultiHashMap *map = cls;
- GNUNET_HashCode key;
- struct MetaCounter *cnt, *first_cnt;
-
- GNUNET_CRYPTO_hash (data, data_len, &key);
- first_cnt = GNUNET_CONTAINER_multihashmap_get (map, &key);
- for (cnt = first_cnt; cnt
- && cnt->data_size != data_len
- && memcmp (cnt->data, data, cnt->data_size) != 0; cnt = cnt->next);
- if (cnt == NULL)
- {
- cnt = GNUNET_malloc (sizeof (struct MetaCounter));
- cnt->data = data;
- cnt->data_size = data_len;
- cnt->plugin_name = plugin_name;
- cnt->type = type;
- cnt->format = format;
- cnt->data_mime_type = data_mime_type;
-
- if (first_cnt != NULL)
+ if (NULL != pos->parent)
{
- if (first_cnt->prev != NULL)
- {
- first_cnt->prev->next = cnt;
- cnt->prev = first_cnt->prev;
- }
- first_cnt->prev = cnt;
- cnt->next = first_cnt;
+ pos = pos->parent;
+ moved = -1; /* force move to 'next' or 'parent' */
+ continue;
}
- else
- GNUNET_CONTAINER_multihashmap_put (map, &key, cnt,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ /* no more options, end of traversal */
+ return NULL;
}
- cnt->count++;
- return 0;
+ return pos;
}
-/**
- * Allocates a struct GNUNET_FS_ShareTreeItem and adds it to its parent.
- */
-static struct GNUNET_FS_ShareTreeItem *
-make_item (struct GNUNET_FS_ShareTreeItem *parent)
-{
- struct GNUNET_FS_ShareTreeItem *item;
- item = GNUNET_malloc (sizeof (struct GNUNET_FS_ShareTreeItem));
-
- item->parent = parent;
- if (parent)
- GNUNET_CONTAINER_DLL_insert (parent->children_head, parent->children_tail,
- item);
- return item;
-}
-
-/**
- * Extract metadata from a file and add it to the share tree
- *
- * @param adc context to modify
- * @param filename name of the file to process
- */
-static void
-extract_file (struct AddDirStack *ads, const char *filename)
-{
- struct GNUNET_FS_ShareTreeItem *item;
- const char *short_fn;
-
- item = make_item (ads->parent);
-
- GNUNET_DISK_file_size (filename, &item->file_size, GNUNET_YES);
- item->is_directory = GNUNET_NO;
-
- item->meta = GNUNET_CONTAINER_meta_data_create ();
- GNUNET_FS_meta_data_extract_from_file (item->meta, filename,
- ads->adc->plugins);
- GNUNET_CONTAINER_meta_data_delete (item->meta, EXTRACTOR_METATYPE_FILENAME,
- NULL, 0);
- short_fn = GNUNET_STRINGS_get_short_name (filename);
-
- item->filename = GNUNET_strdup (filename);
- item->short_filename = GNUNET_strdup (short_fn);
-
- GNUNET_CONTAINER_meta_data_insert (item->meta, "<libgnunetfs>",
- EXTRACTOR_METATYPE_FILENAME,
- EXTRACTOR_METAFORMAT_UTF8, "text/plain",
- short_fn, strlen (short_fn) + 1);
-}
-
-/**
- * Remove the keyword from the ksk URI.
- *
- * @param cls the ksk uri
- * @param keyword the word to remove
- * @param is_mandatory ignored
- * @return always GNUNET_OK
- */
-static int
-remove_keyword (void *cls, const char *keyword, int is_mandatory)
-{
- struct GNUNET_FS_Uri *ksk = cls;
-
- GNUNET_FS_uri_ksk_remove_keyword (ksk, keyword);
- return GNUNET_OK;
-}
/**
- * Remove keywords from current directory's children, if they are
- * in the exluded keywords list of that directory.
+ * Add another child node to the tree.
*
- * @param cls the ksk uri
- * @param keyword the word to remove
- * @param is_mandatory ignored
- * @return always GNUNET_OK
+ * @param parent parent of the child, NULL for top level
+ * @param filename name of the file or directory
+ * @param is_directory GNUNET_YES for directories
+ * @return new entry that was just created
*/
-static int
-remove_keywords (struct ProcessMetadataStackItem *stack, struct GNUNET_FS_ShareTreeItem *dir)
-{
- struct GNUNET_FS_ShareTreeItem *item;
-
- for (item = dir->children_head; item; item = item->next)
- {
- if (stack->exclude_ksk != NULL)
- GNUNET_FS_uri_ksk_get_keywords (stack->exclude_ksk, &remove_keyword, item->ksk_uri);
- }
- return GNUNET_OK;
-}
-
-/**
- * Context passed to 'migrate_and_drop'.
- */
-struct KeywordProcessContext
-{
- /**
- * All the keywords we migrated to the parent.
- */
- struct GNUNET_FS_Uri *ksk;
-
- /**
- * How often does a keyword have to occur to be
- * migrated to the parent?
- */
- unsigned int threshold;
-};
-
-/**
- * Context passed to 'migrate_and_drop'.
- */
-struct MetaProcessContext
-{
- /**
- * All the metadata we copy to the parent.
- */
- struct GNUNET_CONTAINER_MetaData *meta;
-
- /**
- * How often does a metadata have to occur to be
- * migrated to the parent?
- */
- unsigned int threshold;
-};
-
-
-/**
- * Move "frequent" keywords over to the
- * target ksk uri, free the counters.
- *
- */
-static int
-migrate_and_drop (void *cls, const GNUNET_HashCode * key, void *value)
+static struct GNUNET_FS_ShareTreeItem *
+expand_tree (struct GNUNET_FS_ShareTreeItem *parent,
+ const char *filename,
+ int is_directory)
{
- struct KeywordProcessContext *kpc = cls;
- struct KeywordCounter *counter = value;
-
- if (counter->count >= kpc->threshold && counter->count > 1)
- {
- GNUNET_FS_uri_ksk_add_keyword (kpc->ksk, counter->value, GNUNET_NO);
- }
- GNUNET_free (counter);
- return GNUNET_YES;
+ struct GNUNET_FS_ShareTreeItem *chld;
+ size_t slen;
+
+ chld = GNUNET_malloc (sizeof (struct GNUNET_FS_ShareTreeItem));
+ chld->parent = parent;
+ chld->filename = GNUNET_strdup (filename);
+ GNUNET_asprintf (&chld->short_filename,
+ "%s%s",
+ GNUNET_STRINGS_get_short_name (filename),
+ is_directory == GNUNET_YES ? "/" : "");
+ /* make sure we do not end with '//' */
+ slen = strlen (chld->short_filename);
+ if ( (slen >= 2) &&
+ (chld->short_filename[slen-1] == '/') &&
+ (chld->short_filename[slen-2] == '/') )
+ chld->short_filename[slen-1] = '\0';
+ chld->is_directory = is_directory;
+ if (NULL != parent)
+ GNUNET_CONTAINER_DLL_insert (parent->children_head,
+ parent->children_tail,
+ chld);
+ return chld;
}
-/**
- * Copy "frequent" metadata items over to the
- * target metadata container, free the counters.
- *
- */
-static int
-migrate_and_drop_metadata (void *cls, const GNUNET_HashCode * key, void *value)
-{
- struct MetaProcessContext *mpc = cls;
- struct MetaCounter *counter = value;
- if (counter->count >= mpc->threshold && counter->count > 1)
- {
- GNUNET_CONTAINER_meta_data_insert (mpc->meta,
- counter->plugin_name,
- counter->type,
- counter->format,
- counter->data_mime_type, counter->data,
- counter->data_size);
- }
- GNUNET_free (counter);
- return GNUNET_YES;
-}
/**
- * Go over the collected keywords from all entries in the
- * directory and push common keywords up one level (by
- * adding it to the returned struct). Do the same for metadata.
- * Destroys keywordcounter and metacoutner for current directory.
+ * Task run last to shut everything down.
*
- * @param adc collection of child meta data
- * @param exclude_ksk pointer to where moveable keywords will be stored
- * @param copy_meta pointer to where copyable metadata will be stored
+ * @param cls the 'struct GNUNET_FS_DirScanner'
+ * @param tc unused
*/
static void
-process_keywords_and_metadata (struct ProcessMetadataStackItem *stack,
- struct GNUNET_FS_Uri **exclude_ksk,
- struct GNUNET_CONTAINER_MetaData **copy_meta)
-{
- struct KeywordProcessContext kpc;
- struct MetaProcessContext mpc;
- struct GNUNET_CONTAINER_MetaData *tmp;
-
- /* Surprisingly, it's impossible to create a ksk with 0 keywords directly.
- * But we can create one from an empty metadata set
- */
- tmp = GNUNET_CONTAINER_meta_data_create ();
- kpc.ksk = GNUNET_FS_uri_ksk_create_from_meta_data (tmp);
- GNUNET_CONTAINER_meta_data_destroy (tmp);
- mpc.meta = GNUNET_CONTAINER_meta_data_create ();
-
- kpc.threshold = mpc.threshold = (stack->dir_entry_count + 1) / 2; /* 50% */
-
- GNUNET_CONTAINER_multihashmap_iterate (stack->keywordcounter,
- &migrate_and_drop, &kpc);
- GNUNET_CONTAINER_multihashmap_iterate (stack->metacounter,
- &migrate_and_drop_metadata, &mpc);
-
- GNUNET_CONTAINER_multihashmap_destroy (stack->keywordcounter);
- GNUNET_CONTAINER_multihashmap_destroy (stack->metacounter);
- *exclude_ksk = kpc.ksk;
- *copy_meta = mpc.meta;
-}
-
-/**
- * Function called by the directory iterator to
- * (recursively) add all of the files in the
- * directory to the tree.
- * Called by the directory scanner to initiate the
- * scan.
- * TODO: find a way to make it non-recursive.
- *
- * @param cls the 'struct AddDirStack *' we're in
- * @param filename file or directory to scan
- */
-static int
-scan_directory (void *cls, const char *filename)
-{
- struct AddDirStack *ads = cls, recurse_ads;
- struct AddDirContext *adc = ads->adc;
- struct stat sbuf;
- struct GNUNET_FS_ShareTreeItem *item;
- const char *short_fn;
- int do_stop = 0;
-
- /* Wrap up fast */
- if (adc->do_stop)
- return GNUNET_SYSERR;
-
- /* If the file doesn't exist (or is not statable for any other reason,
- * skip it, and report it.
- */
- if (0 != STAT (filename, &sbuf))
- {
- do_stop = write_progress (adc, filename, S_ISDIR (sbuf.st_mode),
- GNUNET_DIR_SCANNER_DOES_NOT_EXIST);
- return GNUNET_OK;
- }
-
- /* Report the progress */
- do_stop = write_progress (adc, filename, S_ISDIR (sbuf.st_mode),
- GNUNET_DIR_SCANNER_NEW_FILE);
- if (do_stop)
- {
- /* We were asked to stop, acknowledge that and return */
- do_stop = write_progress (adc, filename, S_ISDIR (sbuf.st_mode),
- GNUNET_DIR_SCANNER_ASKED_TO_STOP);
- return GNUNET_SYSERR;
- }
-
- if (!S_ISDIR (sbuf.st_mode))
- extract_file (ads, filename);
- else
- {
- item = make_item (ads->parent);
- item->meta = GNUNET_CONTAINER_meta_data_create ();
-
- item->is_directory = GNUNET_YES;
-
- recurse_ads.adc = adc;
- recurse_ads.parent = item;
-
- /* recurse into directory */
- GNUNET_DISK_directory_scan (filename, &scan_directory, &recurse_ads);
-
- short_fn = GNUNET_STRINGS_get_short_name (filename);
-
- item->filename = GNUNET_strdup (filename);
- item->short_filename = GNUNET_strdup (short_fn);
-
- if (ads->parent == NULL)
- {
- /* we're finished with the scan, make sure caller gets the top-level
- * directory pointer
- */
- adc->toplevel = item;
- }
- }
- return GNUNET_OK;
-}
-
-/**
- * Signals the scanner to finish the scan as fast as possible.
- * Does not block.
- * Can close the pipe if asked to, but that is only used by the
- * internal call to this function during cleanup. The client
- * must understand the consequences of closing the pipe too early.
- *
- * @param ds directory scanner structure
- * @param close_pipe GNUNET_YES to close
- */
-void
-GNUNET_FS_directory_scan_finish (struct GNUNET_FS_DirScanner *ds,
- int close_pipe)
+finish_scan (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- char c = 1;
- GNUNET_DISK_file_write (ds->stop_write, &c, 1);
+ struct GNUNET_FS_DirScanner *ds = cls;
- if (close_pipe)
+ ds->stop_task = GNUNET_SCHEDULER_NO_TASK;
+ if (NULL != ds->helper)
{
- if (ds->progress_read_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (ds->progress_read_task);
- ds->progress_read_task = GNUNET_SCHEDULER_NO_TASK;
- }
- GNUNET_DISK_pipe_close_end (ds->progress_pipe, GNUNET_DISK_PIPE_END_READ);
- ds->progress_read = NULL;
+ GNUNET_HELPER_stop (ds->helper, GNUNET_NO);
+ ds->helper = NULL;
}
+ ds->progress_callback (ds->progress_callback_cls,
+ NULL, GNUNET_SYSERR,
+ GNUNET_FS_DIRSCANNER_FINISHED);
}
-/**
- * Signals the scanner thread to finish (in case it isn't finishing
- * already) and joins the scanner thread. Closes the pipes, frees the
- * scanner contexts (both of them), returns the results of the scan.
- * Results are valid (and have to be freed) even if the scanner had
- * an error or was rushed to finish prematurely.
- * Blocks until the scanner is finished.
- *
- * @param ds directory scanner structure
- * @return the results of the scan (a directory tree)
- */
-struct GNUNET_FS_ShareTreeItem *
-GNUNET_FS_directory_scan_cleanup (struct GNUNET_FS_DirScanner *ds)
-{
- struct GNUNET_FS_ShareTreeItem *result;
-
- GNUNET_FS_directory_scan_finish (ds, GNUNET_YES);
-#if WINDOWS
- WaitForSingleObject (ds->thread, INFINITE);
- CloseHandle (ds->thread);
-#else
- pthread_join (ds->thread, NULL);
- pthread_detach (ds->thread);
-#endif
-
- GNUNET_DISK_pipe_close (ds->stop_pipe);
- GNUNET_DISK_pipe_close (ds->progress_pipe);
- result = ds->adc->toplevel;
- GNUNET_free (ds->adc);
- GNUNET_free (ds);
- return result;
-}
-
-/**
- * The function from which the scanner thread starts
- */
-#if WINDOWS
-static DWORD
-#else
-static void *
-#endif
-run_directory_scan_thread (void *cls)
-{
- struct AddDirContext *adc = cls;
- struct AddDirStack ads;
- ads.adc = adc;
- ads.parent = NULL;
- scan_directory (&ads, adc->filename_expanded);
- GNUNET_free (adc->filename_expanded);
- if (adc->plugins != NULL)
- EXTRACTOR_plugin_remove_all (adc->plugins);
- /* Tell the initiator that we're finished, it can now join the thread */
- write_progress (adc, NULL, 0, GNUNET_DIR_SCANNER_FINISHED);
- return 0;
-}
/**
* Called every time there is data to read from the scanner.
* Calls the scanner progress handler.
*
* @param cls the closure (directory scanner object)
- * @param tc task context in which the task is running
+ * @param client always NULL
+ * @param msg message from the helper process
*/
-static void
-read_progress_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+static int
+process_helper_msgs (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *msg)
{
- struct GNUNET_FS_DirScanner *ds;
- int end_it = 0;
- enum GNUNET_FS_DirScannerProgressUpdateReason reason;
- ssize_t rd;
- ssize_t total_read;
-
- size_t filename_len;
- char is_directory;
- char *filename;
-
- ds = cls;
-
- ds->progress_read_task = GNUNET_SCHEDULER_NO_TASK;
-
- if (!(tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
- {
- ds->progress_callback (ds->cls, ds, NULL, 0, GNUNET_DIR_SCANNER_SHUTDOWN);
- return;
- }
-
- /* Read one message. If message is malformed or can't be read, end the scanner */
- total_read = rd = GNUNET_DISK_file_read (ds->progress_read, &reason, sizeof (reason));
- while (rd > 0 && total_read < sizeof (reason))
- {
- rd = GNUNET_DISK_file_read (ds->progress_read,
- &((char *) &reason)[total_read],
- sizeof (reason) - total_read);
- if (rd > 0)
- total_read += rd;
- }
- if (total_read != sizeof (reason)
- || reason <= GNUNET_DIR_SCANNER_FIRST
- || reason >= GNUNET_DIR_SCANNER_LAST)
- {
- end_it = 1;
- reason = GNUNET_DIR_SCANNER_PROTOCOL_ERROR;
- }
-
- if (!end_it)
+ struct GNUNET_FS_DirScanner *ds = cls;
+ const char *filename;
+ size_t left;
+
+#if 0
+ fprintf (stderr, "DMS parses %u-byte message of type %u\n",
+ (unsigned int) ntohs (msg->size),
+ (unsigned int) ntohs (msg->type));
+#endif
+ left = ntohs (msg->size) - sizeof (struct GNUNET_MessageHeader);
+ filename = (const char*) &msg[1];
+ switch (ntohs (msg->type))
{
- total_read = rd = GNUNET_DISK_file_read (ds->progress_read, &filename_len,
- sizeof (size_t));
- while (rd > 0 && total_read < sizeof (size_t))
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_PROGRESS_FILE:
+ if (filename[left-1] != '\0')
{
- rd = GNUNET_DISK_file_read (ds->progress_read,
- &((char *) &filename_len)[total_read],
- sizeof (size_t) - total_read);
- if (rd > 0)
- total_read += rd;
+ GNUNET_break (0);
+ break;
}
- if (rd != sizeof (size_t))
+ ds->progress_callback (ds->progress_callback_cls,
+ filename, GNUNET_NO,
+ GNUNET_FS_DIRSCANNER_FILE_START);
+ if (NULL == ds->toplevel)
+ ds->toplevel = expand_tree (ds->pos,
+ filename, GNUNET_NO);
+ else
+ (void) expand_tree (ds->pos,
+ filename, GNUNET_NO);
+ return GNUNET_OK;
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_PROGRESS_DIRECTORY:
+ if (filename[left-1] != '\0')
{
- end_it = 1;
- reason = GNUNET_DIR_SCANNER_PROTOCOL_ERROR;
+ GNUNET_break (0);
+ break;
}
- }
- if (!end_it)
- {
- if (filename_len == 0)
- end_it = 1;
- else if (filename_len > PATH_MAX)
+ if (0 == strcmp ("..", filename))
{
- end_it = 1;
- reason = GNUNET_DIR_SCANNER_PROTOCOL_ERROR;
+ if (NULL == ds->pos)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ ds->pos = ds->pos->parent;
+ return GNUNET_OK;
}
- }
- if (!end_it)
- {
- filename = GNUNET_malloc (filename_len);
- total_read = rd = GNUNET_DISK_file_read (ds->progress_read, filename,
- filename_len);
- while (rd > 0 && total_read < filename_len)
+ ds->progress_callback (ds->progress_callback_cls,
+ filename, GNUNET_YES,
+ GNUNET_FS_DIRSCANNER_FILE_START);
+ ds->pos = expand_tree (ds->pos,
+ filename, GNUNET_YES);
+ if (NULL == ds->toplevel)
+ ds->toplevel = ds->pos;
+ return GNUNET_OK;
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_ERROR:
+ break;
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_SKIP_FILE:
+ if ('\0' != filename[left-1])
+ break;
+ ds->progress_callback (ds->progress_callback_cls,
+ filename, GNUNET_SYSERR,
+ GNUNET_FS_DIRSCANNER_FILE_IGNORED);
+ return GNUNET_OK;
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_COUNTING_DONE:
+ if (0 != left)
{
- rd = GNUNET_DISK_file_read (ds->progress_read, &filename[total_read],
- filename_len - total_read);
- if (rd > 0)
- total_read += rd;
+ GNUNET_break (0);
+ break;
}
- if (rd != filename_len)
+ if (NULL == ds->toplevel)
{
- GNUNET_free (filename);
- reason = GNUNET_DIR_SCANNER_PROTOCOL_ERROR;
- end_it = 1;
+ GNUNET_break (0);
+ break;
}
- }
- if (!end_it && filename_len > 0)
- {
- total_read = rd = GNUNET_DISK_file_read (ds->progress_read, &is_directory,
- sizeof (char));
- while (rd > 0 && total_read < sizeof (char))
+ ds->progress_callback (ds->progress_callback_cls,
+ NULL, GNUNET_SYSERR,
+ GNUNET_FS_DIRSCANNER_ALL_COUNTED);
+ ds->pos = ds->toplevel;
+ if (GNUNET_YES == ds->pos->is_directory)
+ ds->pos = advance (ds->pos);
+ return GNUNET_OK;
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_META_DATA:
{
- rd = GNUNET_DISK_file_read (ds->progress_read, &(&is_directory)[total_read],
- sizeof (char) - total_read);
- if (rd > 0)
- total_read += rd;
+ size_t nlen;
+ const char *end;
+
+ if (NULL == ds->pos)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ end = memchr (filename, 0, left);
+ if (NULL == end)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ end++;
+ nlen = end - filename;
+ left -= nlen;
+ if (0 != strcmp (filename,
+ ds->pos->filename))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ ds->progress_callback (ds->progress_callback_cls,
+ filename, GNUNET_YES,
+ GNUNET_FS_DIRSCANNER_EXTRACT_FINISHED);
+ if (0 < left)
+ {
+ ds->pos->meta = GNUNET_CONTAINER_meta_data_deserialize (end, left);
+ if (NULL == ds->pos->meta)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ /* having full filenames is too dangerous; always make sure we clean them up */
+ GNUNET_CONTAINER_meta_data_delete (ds->pos->meta,
+ EXTRACTOR_METATYPE_FILENAME,
+ NULL, 0);
+ /* instead, put in our 'safer' original filename */
+ GNUNET_CONTAINER_meta_data_insert (ds->pos->meta, "<libgnunetfs>",
+ EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME,
+ EXTRACTOR_METAFORMAT_UTF8, "text/plain",
+ ds->pos->short_filename,
+ strlen (ds->pos->short_filename) + 1);
+ }
+ ds->pos->ksk_uri = GNUNET_FS_uri_ksk_create_from_meta_data (ds->pos->meta);
+ ds->pos = advance (ds->pos);
+ return GNUNET_OK;
}
- if (rd != sizeof (char))
+ case GNUNET_MESSAGE_TYPE_FS_PUBLISH_HELPER_FINISHED:
+ if (NULL != ds->pos)
{
- GNUNET_free (filename);
- reason = GNUNET_DIR_SCANNER_PROTOCOL_ERROR;
- end_it = 1;
+ GNUNET_break (0);
+ break;
}
- }
- if (!end_it)
- {
- end_it = ds->progress_callback (ds->cls, ds, (const char *) filename, is_directory, reason);
- GNUNET_free (filename);
- if (!end_it)
+ if (0 != left)
{
- ds->progress_read_task = GNUNET_SCHEDULER_add_read_file (
- GNUNET_TIME_UNIT_FOREVER_REL, ds->progress_read, &read_progress_task,
- cls);
+ GNUNET_break (0);
+ break;
+ }
+ if (NULL == ds->toplevel)
+ {
+ GNUNET_break (0);
+ break;
}
+ ds->stop_task = GNUNET_SCHEDULER_add_now (&finish_scan,
+ ds);
+ return GNUNET_OK;
+ default:
+ GNUNET_break (0);
+ break;
}
- else
- {
- ds->progress_callback (ds->cls, ds, NULL, 0, reason);
- }
+ ds->progress_callback (ds->progress_callback_cls,
+ NULL, GNUNET_SYSERR,
+ GNUNET_FS_DIRSCANNER_INTERNAL_ERROR);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Function called if our helper process died.
+ *
+ * @param cls the 'struct GNUNET_FS_DirScanner' callback.
+ */
+static void
+helper_died_cb (void *cls)
+{
+ struct GNUNET_FS_DirScanner *ds = cls;
+
+ ds->helper = NULL;
+ if (GNUNET_SCHEDULER_NO_TASK != ds->stop_task)
+ return; /* normal death, was finished */
+ ds->progress_callback (ds->progress_callback_cls,
+ NULL, GNUNET_SYSERR,
+ GNUNET_FS_DIRSCANNER_INTERNAL_ERROR);
}
* Start a directory scanner thread.
*
* @param filename name of the directory to scan
- * @param GNUNET_YES to not to run libextractor on files (only build a tree)
+ * @param disable_extractor GNUNET_YES to not to run libextractor on files (only build a tree)
* @param ex if not NULL, must be a list of extra plugins for extractor
* @param cb the callback to call when there are scanning progress messages
- * @param cls closure for 'cb'
+ * @param cb_cls closure for 'cb'
* @return directory scanner object to be used for controlling the scanner
*/
struct GNUNET_FS_DirScanner *
GNUNET_FS_directory_scan_start (const char *filename,
- int disable_extractor, const char *ex,
- GNUNET_FS_DirScannerProgressCallback cb, void *cls)
+ int disable_extractor, const char *ex,
+ GNUNET_FS_DirScannerProgressCallback cb,
+ void *cb_cls)
{
struct stat sbuf;
- struct AddDirContext *adc;
char *filename_expanded;
struct GNUNET_FS_DirScanner *ds;
- struct GNUNET_DISK_PipeHandle *progress_pipe;
- int ok;
if (0 != STAT (filename, &sbuf))
return NULL;
- /* TODO: consider generalizing this for files too! */
- if (!S_ISDIR (sbuf.st_mode))
- {
- GNUNET_break (0);
- return NULL;
- }
- /* scan_directory() is guaranteed to be given expanded filenames,
- * so expand we will!
- */
filename_expanded = GNUNET_STRINGS_filename_expand (filename);
- if (filename_expanded == NULL)
+ if (NULL == filename_expanded)
return NULL;
-
- progress_pipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_NO, GNUNET_NO);
- if (progress_pipe == NULL)
- {
- GNUNET_free (filename_expanded);
- return NULL;
- }
-
- adc = GNUNET_malloc (sizeof (struct AddDirContext));
-
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting to scan directory `%s'\n",
+ filename_expanded);
ds = GNUNET_malloc (sizeof (struct GNUNET_FS_DirScanner));
-
- ds->adc = adc;
-
- ds->stop_pipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_NO, GNUNET_NO);
- if (ds->stop_pipe == NULL)
- {
- GNUNET_free (adc);
- GNUNET_free (ds);
- GNUNET_free (filename_expanded);
- GNUNET_DISK_pipe_close (progress_pipe);
- return NULL;
- }
- ds->stop_write = GNUNET_DISK_pipe_handle (ds->stop_pipe,
- GNUNET_DISK_PIPE_END_WRITE);
- adc->stop_read = GNUNET_DISK_pipe_handle (ds->stop_pipe,
- GNUNET_DISK_PIPE_END_READ);
-
- adc->plugins = NULL;
- if (!disable_extractor)
- {
- adc->plugins = EXTRACTOR_plugin_add_defaults (
- EXTRACTOR_OPTION_DEFAULT_POLICY);
- if (ex && strlen (ex) > 0)
- adc->plugins = EXTRACTOR_plugin_add_config (adc->plugins, ex,
- EXTRACTOR_OPTION_DEFAULT_POLICY);
- }
-
- adc->filename_expanded = filename_expanded;
- adc->progress_write = GNUNET_DISK_pipe_handle (progress_pipe,
- GNUNET_DISK_PIPE_END_WRITE);
-
-
- ds->progress_read = GNUNET_DISK_pipe_handle (progress_pipe,
- GNUNET_DISK_PIPE_END_READ);
-
-#if WINDOWS
- ds->thread = CreateThread (NULL, 0,
- (LPTHREAD_START_ROUTINE) &run_directory_scan_thread, (LPVOID) adc,
- 0, NULL);
- ok = ds->thread != NULL;
-#else
- ok = !pthread_create (&ds->thread, NULL, &run_directory_scan_thread,
- (void *) adc);
-#endif
- if (!ok)
- {
- GNUNET_free (adc);
+ ds->progress_callback = cb;
+ ds->progress_callback_cls = cb_cls;
+ ds->filename_expanded = filename_expanded;
+ if (disable_extractor)
+ ds->ex_arg = GNUNET_strdup ("-");
+ else
+ ds->ex_arg = (NULL != ex) ? GNUNET_strdup (ex) : NULL;
+ ds->args[0] = "gnunet-helper-fs-publish";
+ ds->args[1] = ds->filename_expanded;
+ ds->args[2] = ds->ex_arg;
+ ds->args[3] = NULL;
+ ds->helper = GNUNET_HELPER_start (GNUNET_NO,
+ "gnunet-helper-fs-publish",
+ ds->args,
+ &process_helper_msgs,
+ &helper_died_cb, ds);
+ if (NULL == ds->helper)
+ {
GNUNET_free (filename_expanded);
- GNUNET_DISK_pipe_close (progress_pipe);
GNUNET_free (ds);
return NULL;
}
-
- ds->progress_callback = cb;
- ds->cls = cls;
- ds->adc = adc;
- ds->progress_pipe = progress_pipe;
-
- ds->progress_read_task = GNUNET_SCHEDULER_add_read_file (
- GNUNET_TIME_UNIT_FOREVER_REL, ds->progress_read, &read_progress_task,
- ds);
-
return ds;
}
-/**
- * Task that post-processes the share item tree.
- * This processing has to be done in the main thread, because
- * it requires access to libgcrypt's hashing functions, and
- * libgcrypt is not thread-safe without some special magic.
- *
- * @param cls top of the stack
- * @param tc task context
- */
-static void
-trim_share_tree_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct ProcessMetadataStackItem *stack = cls;
- struct ProcessMetadataStackItem *next = stack;
- /* FIXME: figure out what to do when tc says we're shutting down */
-
- /* item == NULL means that we've just finished going over the children of
- * current directory.
- */
- if (stack->item == NULL)
- {
- if (stack->parent->item != NULL)
- {
- /* end of a directory */
- struct GNUNET_FS_Uri *ksk;
-
- /* use keyword and metadata counters to create lists of keywords to move
- * and metadata to copy.
- */
- process_keywords_and_metadata (stack, &stack->parent->exclude_ksk, &stack->parent->item->meta);
-
- /* create keywords from metadata (copies all text-metadata as keywords,
- * AND parses the directory name we've just added, producing even more
- * keywords.
- * then merge these keywords with the ones moved from children.
- */
- ksk = GNUNET_FS_uri_ksk_create_from_meta_data (stack->parent->item->meta);
- stack->parent->item->ksk_uri = GNUNET_FS_uri_ksk_merge (ksk, stack->parent->exclude_ksk);
- GNUNET_FS_uri_destroy (ksk);
-
- /* remove moved keywords from children (complete the move) */
- remove_keywords (stack->parent, stack->parent->item);
- GNUNET_FS_uri_destroy (stack->parent->exclude_ksk);
-
- /* go up the stack */
- next = stack->parent;
- GNUNET_free (stack);
- next->end_directory = GNUNET_YES;
- }
- else
- {
- /* we've just finished processing the toplevel directory */
- struct GNUNET_FS_ProcessMetadataContext *ctx = stack->ctx;
- next = NULL;
- GNUNET_SCHEDULER_add_continuation (ctx->cb, ctx->cls,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- GNUNET_free (stack->parent);
- GNUNET_free (stack);
- GNUNET_free (ctx);
- }
- }
- else if (stack->item->is_directory
- && !stack->end_directory
- && stack->item->children_head != NULL)
- {
- /* recurse into subdirectory */
- next = GNUNET_malloc (sizeof (struct ProcessMetadataStackItem));
- next->ctx = stack->ctx;
- next->item = stack->item->children_head;
- next->keywordcounter = GNUNET_CONTAINER_multihashmap_create (1024);
- next->metacounter = GNUNET_CONTAINER_multihashmap_create (1024);
- next->dir_entry_count = 0;
- next->parent = stack;
- }
- else
- {
- /* process a child entry (a file or a directory) and move to the next one*/
- if (stack->item->is_directory)
- stack->end_directory = GNUNET_NO;
- stack->dir_entry_count++;
- GNUNET_CONTAINER_meta_data_iterate (stack->item->meta, &add_to_meta_counter, stack->metacounter);
-
- if (stack->item->is_directory)
- {
- char *user = getenv ("USER");
- if ((user == NULL) || (0 != strncasecmp (user, stack->item->short_filename, strlen(user))))
- {
- /* only use filename if it doesn't match $USER */
- GNUNET_CONTAINER_meta_data_insert (stack->item->meta, "<libgnunetfs>",
- EXTRACTOR_METATYPE_FILENAME,
- EXTRACTOR_METAFORMAT_UTF8,
- "text/plain", stack->item->short_filename,
- strlen (stack->item->short_filename) + 1);
- GNUNET_CONTAINER_meta_data_insert (stack->item->meta, "<libgnunetfs>",
- EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME,
- EXTRACTOR_METAFORMAT_UTF8,
- "text/plain", stack->item->short_filename,
- strlen (stack->item->short_filename) + 1);
- }
- }
-
- stack->item->ksk_uri = GNUNET_FS_uri_ksk_create_from_meta_data (stack->item->meta);
- GNUNET_FS_uri_ksk_get_keywords (stack->item->ksk_uri, &add_to_keyword_counter, stack->keywordcounter);
- stack->item = stack->item->next;
- }
- /* Call this task again later, if there are more entries to process */
- if (next)
- GNUNET_SCHEDULER_add_continuation (&trim_share_tree_task, next,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
-}
-
-/**
- * Process a share item tree, moving frequent keywords up and
- * copying frequent metadata up.
- *
- * @param toplevel toplevel directory in the tree, returned by the scanner
- * @param cb called after processing is done
- * @param cls closure for 'cb'
- */
-struct GNUNET_FS_ProcessMetadataContext *
-GNUNET_FS_trim_share_tree (struct GNUNET_FS_ShareTreeItem *toplevel,
- GNUNET_SCHEDULER_Task cb, void *cls)
-{
- struct GNUNET_FS_ProcessMetadataContext *ret;
- if (toplevel == NULL)
- {
- struct GNUNET_SCHEDULER_TaskContext tc;
- tc.reason = GNUNET_SCHEDULER_REASON_PREREQ_DONE;
- cb (cls, &tc);
- return NULL;
- }
-
- ret = GNUNET_malloc (sizeof (struct GNUNET_FS_ProcessMetadataContext));
- ret->toplevel = toplevel;
- ret->stack = GNUNET_malloc (sizeof (struct ProcessMetadataStackItem));
- ret->stack->ctx = ret;
- ret->stack->item = toplevel;
- ret->stack->keywordcounter = GNUNET_CONTAINER_multihashmap_create (1024);
- ret->stack->metacounter = GNUNET_CONTAINER_multihashmap_create (1024);
- ret->stack->dir_entry_count = 0;
- ret->stack->end_directory = GNUNET_NO;
-
- /* dummy stack entry that tells us we're at the top of the stack */
- ret->stack->parent = GNUNET_malloc (sizeof (struct ProcessMetadataStackItem));
- ret->stack->parent->ctx = ret;
-
- ret->cb = cb;
- ret->cls = cls;
-
- GNUNET_SCHEDULER_add_continuation (&trim_share_tree_task, ret->stack,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- return ret;
-}
+/* end of fs_dirmetascan.c */