X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Fdatastore%2Fgnunet-service-datastore.c;h=6fb1ebf1b31d41acf5e84ea6eefacc2bf3cf258c;hb=0e4c7cdccfc4105f9c6e529cfa0e3722104b0ddf;hp=8a3510946af3faffc58475f26c39ced2f452ee82;hpb=ac67c32972aeeb32bff943b9a95448688a3c7543;p=oweals%2Fgnunet.git diff --git a/src/datastore/gnunet-service-datastore.c b/src/datastore/gnunet-service-datastore.c index 8a3510946..6fb1ebf1b 100644 --- a/src/datastore/gnunet-service-datastore.c +++ b/src/datastore/gnunet-service-datastore.c @@ -26,9 +26,9 @@ #include "platform.h" #include "gnunet_util_lib.h" -#include "gnunet_arm_service.h" #include "gnunet_protocols.h" -#include "plugin_datastore.h" +#include "gnunet_statistics_service.h" +#include "gnunet_datastore_plugin.h" #include "datastore.h" /** @@ -42,6 +42,22 @@ */ #define MAX_EXPIRE_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15) +/** + * How fast are we allowed to query the database for deleting + * expired content? (1 item per second). + */ +#define MIN_EXPIRE_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1) + +/** + * Name under which we store current space consumption. + */ +static char *quota_stat_name; + +/** + * After how many payload-changing operations + * do we sync our statistics? + */ +#define MAX_STAT_SYNC_LAG 50 /** @@ -78,7 +94,7 @@ struct DatastorePlugin /** * Linked list of active reservations. */ -struct ReservationList +struct ReservationList { /** @@ -109,6 +125,7 @@ struct ReservationList }; + /** * Our datastore plugin (NULL if not available). */ @@ -125,14 +142,19 @@ static struct ReservationList *reservations; static struct GNUNET_CONTAINER_BloomFilter *filter; /** - * Static counter to produce reservation identifiers. + * How much space are we allowed to use? + */ +static unsigned long long quota; + +/** + * Should the database be dropped on exit? */ -static int reservation_gen; +static int do_drop; /** - * How much space are we allowed to use? + * Name of our plugin. */ -static unsigned long long quota; +static char *plugin_name; /** * How much space are we using for the cache? (space available for @@ -147,6 +169,24 @@ static unsigned long long cache_size; */ static unsigned long long reserved; +/** + * How much data are we currently storing + * in the database? + */ +static unsigned long long payload; + +/** + * Number of updates that were made to the + * payload value since we last synchronized + * it with the statistics service. + */ +static unsigned int lastSync; + +/** + * Did we get an answer from statistics? + */ +static int stats_worked; + /** * Identity of the task that is used to delete * expired content. @@ -159,71 +199,67 @@ static GNUNET_SCHEDULER_TaskIdentifier expired_kill_task; const struct GNUNET_CONFIGURATION_Handle *cfg; /** - * Our scheduler. + * Minimum time that content should have to not be discarded instantly + * (time stamp of any content that we've been discarding recently to + * stay below the quota). FOREVER if we had to expire content with + * non-zero priority. */ -struct GNUNET_SCHEDULER_Handle *sched; +static struct GNUNET_TIME_Absolute min_expiration; /** - * Function called once the transmit operation has - * either failed or succeeded. - * - * @param cls closure - * @param status GNUNET_OK on success, GNUNET_SYSERR on error + * Handle for reporting statistics. */ -typedef void (*TransmitContinuation)(void *cls, - int status); +static struct GNUNET_STATISTICS_Handle *stats; + + +/** + * Synchronize our utilization statistics with the + * statistics service. + */ +static void +sync_stats () +{ + GNUNET_STATISTICS_set (stats, quota_stat_name, payload, GNUNET_YES); + GNUNET_STATISTICS_set (stats, "# utilization by current datastore", payload, GNUNET_NO); + lastSync = 0; +} + /** * Context for transmitting replies to clients. */ -struct TransmitCallbackContext +struct TransmitCallbackContext { - + /** * We keep these in a doubly-linked list (for cleanup). */ struct TransmitCallbackContext *next; - + /** * We keep these in a doubly-linked list (for cleanup). */ struct TransmitCallbackContext *prev; - + /** * The message that we're asked to transmit. */ struct GNUNET_MessageHeader *msg; - + /** * Handle for the transmission request. */ - struct GNUNET_CONNECTION_TransmitHandle *th; + struct GNUNET_SERVER_TransmitHandle *th; /** * Client that we are transmitting to. */ struct GNUNET_SERVER_Client *client; - /** - * Function to call once msg has been transmitted - * (or at least added to the buffer). - */ - TransmitContinuation tc; - - /** - * Closure for tc. - */ - void *tc_cls; - - /** - * GNUNET_YES if we are supposed to signal the server - * completion of the client's request. - */ - int end; }; - + /** * Head of the doubly-linked list (for cleanup). */ @@ -234,6 +270,17 @@ static struct TransmitCallbackContext *tcc_head; */ static struct TransmitCallbackContext *tcc_tail; +/** + * Have we already cleaned up the TCCs and are hence no longer + * willing (or able) to transmit anything to anyone? + */ +static int cleaning_done; + +/** + * Handle for pending get request. + */ +static struct GNUNET_STATISTICS_GetHandle *stat_get; + /** * Task that is used to remove expired entries from @@ -243,10 +290,9 @@ static struct TransmitCallbackContext *tcc_tail; * * @param cls not used * @param tc task context - */ + */ static void -delete_expired (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc); +delete_expired (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc); /** @@ -255,7 +301,6 @@ delete_expired (void *cls, * expired items, re-schedule the "delete_expired" task. * * @param cls not used - * @param next_cls closure to pass to the "next" function. * @param key key for the content * @param size number of bytes in data * @param data content stored @@ -270,47 +315,45 @@ delete_expired (void *cls, * (continue on call to "next", of course), * GNUNET_NO to delete the item and continue (if supported) */ -static int -expired_processor (void *cls, - void *next_cls, - const GNUNET_HashCode * key, - uint32_t size, - const void *data, - uint32_t type, - uint32_t priority, - uint32_t anonymity, - struct GNUNET_TIME_Absolute - expiration, - uint64_t uid) +static int +expired_processor (void *cls, const struct GNUNET_HashCode * key, uint32_t size, + const void *data, enum GNUNET_BLOCK_Type type, + uint32_t priority, uint32_t anonymity, + struct GNUNET_TIME_Absolute expiration, uint64_t uid) { struct GNUNET_TIME_Absolute now; - expired_kill_task = GNUNET_SCHEDULER_NO_TASK; - if (key == NULL) - { - expired_kill_task - = GNUNET_SCHEDULER_add_delayed (sched, - MAX_EXPIRE_DELAY, - &delete_expired, - NULL); - return GNUNET_SYSERR; - } + if (key == NULL) + { + expired_kill_task = + GNUNET_SCHEDULER_add_delayed_with_priority (MAX_EXPIRE_DELAY, + GNUNET_SCHEDULER_PRIORITY_IDLE, + &delete_expired, NULL); + return GNUNET_SYSERR; + } now = GNUNET_TIME_absolute_get (); - if (expiration.value > now.value) - { - /* finished processing */ - plugin->api->next_request (next_cls, GNUNET_YES); - return GNUNET_SYSERR; - } - plugin->api->next_request (next_cls, GNUNET_NO); -#if DEBUG_DATASTORE + if (expiration.abs_value > now.abs_value) + { + /* finished processing */ + expired_kill_task = + GNUNET_SCHEDULER_add_delayed_with_priority (MAX_EXPIRE_DELAY, + GNUNET_SCHEDULER_PRIORITY_IDLE, + &delete_expired, NULL); + return GNUNET_SYSERR; + } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Deleting content that expired %llu ms ago\n", - (unsigned long long) (now.value - expiration.value)); -#endif - GNUNET_CONTAINER_bloomfilter_remove (filter, - key); - return GNUNET_NO; /* delete */ + "Deleting content `%s' of type %u that expired %llu ms ago\n", + GNUNET_h2s (key), type, + (unsigned long long) (now.abs_value - expiration.abs_value)); + min_expiration = now; + GNUNET_STATISTICS_update (stats, gettext_noop ("# bytes expired"), size, + GNUNET_YES); + GNUNET_CONTAINER_bloomfilter_remove (filter, key); + expired_kill_task = + GNUNET_SCHEDULER_add_delayed_with_priority (MIN_EXPIRE_DELAY, + GNUNET_SCHEDULER_PRIORITY_IDLE, + &delete_expired, NULL); + return GNUNET_NO; } @@ -322,23 +365,20 @@ expired_processor (void *cls, * * @param cls not used * @param tc task context - */ + */ static void -delete_expired (void *cls, - const struct GNUNET_SCHEDULER_TaskContext *tc) +delete_expired (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { - plugin->api->iter_ascending_expiration (plugin->api->cls, - 0, - &expired_processor, - NULL); + expired_kill_task = GNUNET_SCHEDULER_NO_TASK; + plugin->api->get_expiration (plugin->api->cls, &expired_processor, NULL); } /** - * An iterator over a set of items stored in the datastore. + * An iterator over a set of items stored in the datastore + * that deletes until we're happy with respect to our quota. * * @param cls closure - * @param next_cls closure to pass to the "next" function. * @param key key for the content * @param size number of bytes in data * @param data content stored @@ -353,40 +393,35 @@ delete_expired (void *cls, * (continue on call to "next", of course), * GNUNET_NO to delete the item and continue (if supported) */ -static int -manage (void *cls, - void *next_cls, - const GNUNET_HashCode * key, - uint32_t size, - const void *data, - uint32_t type, - uint32_t priority, - uint32_t anonymity, - struct GNUNET_TIME_Absolute - expiration, - uint64_t uid) +static int +quota_processor (void *cls, const struct GNUNET_HashCode * key, uint32_t size, + const void *data, enum GNUNET_BLOCK_Type type, + uint32_t priority, uint32_t anonymity, + struct GNUNET_TIME_Absolute expiration, uint64_t uid) { unsigned long long *need = cls; if (NULL == key) - { - GNUNET_free (need); - return GNUNET_SYSERR; - } + return GNUNET_SYSERR; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Deleting %llu bytes of low-priority (%u) content `%s' of type %u at %llu ms prior to expiration (still trying to free another %llu bytes)\n", + (unsigned long long) (size + GNUNET_DATASTORE_ENTRY_OVERHEAD), + (unsigned int) priority, + GNUNET_h2s (key), type, + (unsigned long long) GNUNET_TIME_absolute_get_remaining (expiration).rel_value, + *need); if (size + GNUNET_DATASTORE_ENTRY_OVERHEAD > *need) *need = 0; else *need -= size + GNUNET_DATASTORE_ENTRY_OVERHEAD; - plugin->api->next_request (next_cls, - (0 == *need) ? GNUNET_YES : GNUNET_NO); -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Deleting %llu bytes of low-priority content (still trying to free another %llu bytes)\n", - size + GNUNET_DATASTORE_ENTRY_OVERHEAD, - *need); -#endif - GNUNET_CONTAINER_bloomfilter_remove (filter, - key); + if (priority > 0) + min_expiration = GNUNET_TIME_UNIT_FOREVER_ABS; + else + min_expiration = expiration; + GNUNET_STATISTICS_update (stats, + gettext_noop ("# bytes purged (low-priority)"), + size, GNUNET_YES); + GNUNET_CONTAINER_bloomfilter_remove (filter, key); return GNUNET_NO; } @@ -406,19 +441,16 @@ manage (void *cls, static void manage_space (unsigned long long need) { - unsigned long long *n; + unsigned long long last; -#if DEBUG_DATASTORE GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Asked to free up %llu bytes of cache space\n", - need); -#endif - n = GNUNET_malloc (sizeof(unsigned long long)); - *n = need; - plugin->api->iter_low_priority (plugin->api->cls, - 0, - &manage, - n); + "Asked to free up %llu bytes of cache space\n", need); + last = 0; + while ((need > 0) && (last != need)) + { + last = need; + plugin->api->get_expiration (plugin->api->cls, "a_processor, &need); + } } @@ -434,48 +466,28 @@ manage_space (unsigned long long need) * @return number of bytes written to buf */ static size_t -transmit_callback (void *cls, - size_t size, void *buf) +transmit_callback (void *cls, size_t size, void *buf) { struct TransmitCallbackContext *tcc = cls; size_t msize; - + tcc->th = NULL; - GNUNET_CONTAINER_DLL_remove (tcc_head, - tcc_tail, - tcc); - msize = ntohs(tcc->msg->size); + GNUNET_CONTAINER_DLL_remove (tcc_head, tcc_tail, tcc); + msize = ntohs (tcc->msg->size); if (size == 0) - { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "Transmission failed.\n"); -#endif - if (tcc->tc != NULL) - tcc->tc (tcc->tc_cls, GNUNET_SYSERR); - if (GNUNET_YES == tcc->end) - { - GNUNET_SERVER_receive_done (tcc->client, GNUNET_SYSERR); - } - GNUNET_free (tcc->msg); - GNUNET_free (tcc); - return 0; - } + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + _("Transmission to client failed!\n")); + GNUNET_SERVER_receive_done (tcc->client, GNUNET_SYSERR); + GNUNET_SERVER_client_drop (tcc->client); + GNUNET_free (tcc->msg); + GNUNET_free (tcc); + return 0; + } GNUNET_assert (size >= msize); memcpy (buf, tcc->msg, msize); - if (tcc->tc != NULL) - tcc->tc (tcc->tc_cls, GNUNET_OK); - if (GNUNET_YES == tcc->end) - { - GNUNET_SERVER_receive_done (tcc->client, GNUNET_OK); - } - else - { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Response transmitted, more pending!\n"); -#endif - } + GNUNET_SERVER_receive_done (tcc->client, GNUNET_OK); + GNUNET_SERVER_client_drop (tcc->client); GNUNET_free (tcc->msg); GNUNET_free (tcc); return msize; @@ -487,51 +499,37 @@ transmit_callback (void *cls, * * @param client target of the message * @param msg message to transmit, will be freed! - * @param tc function to call afterwards - * @param tc_cls closure for tc - * @param end is this the last response (and we should - * signal the server completion accodingly after - * transmitting this message)? */ static void -transmit (struct GNUNET_SERVER_Client *client, - struct GNUNET_MessageHeader *msg, - TransmitContinuation tc, - void *tc_cls, - int end) +transmit (struct GNUNET_SERVER_Client *client, struct GNUNET_MessageHeader *msg) { struct TransmitCallbackContext *tcc; - tcc = GNUNET_malloc (sizeof(struct TransmitCallbackContext)); + if (GNUNET_YES == cleaning_done) + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + _("Shutdown in progress, aborting transmission.\n")); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + GNUNET_free (msg); + return; + } + tcc = GNUNET_malloc (sizeof (struct TransmitCallbackContext)); tcc->msg = msg; tcc->client = client; - tcc->tc = tc; - tcc->tc_cls = tc_cls; - tcc->end = end; if (NULL == - (tcc->th = GNUNET_SERVER_notify_transmit_ready (client, - ntohs(msg->size), - GNUNET_TIME_UNIT_FOREVER_REL, - &transmit_callback, - tcc))) - { - GNUNET_break (0); - if (GNUNET_YES == end) - { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - "Disconnecting client.\n"); -#endif - GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); - } - if (NULL != tc) - tc (tc_cls, GNUNET_SYSERR); - GNUNET_free (msg); - GNUNET_free (tcc); - } - GNUNET_CONTAINER_DLL_insert (tcc_head, - tcc_tail, - tcc); + (tcc->th = + GNUNET_SERVER_notify_transmit_ready (client, ntohs (msg->size), + GNUNET_TIME_UNIT_FOREVER_REL, + &transmit_callback, tcc))) + { + GNUNET_break (0); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + GNUNET_free (msg); + GNUNET_free (tcc); + return; + } + GNUNET_SERVER_client_keep (client); + GNUNET_CONTAINER_DLL_insert (tcc_head, tcc_tail, tcc); } @@ -543,60 +541,32 @@ transmit (struct GNUNET_SERVER_Client *client, * @param msg optional error message (can be NULL) */ static void -transmit_status (struct GNUNET_SERVER_Client *client, - int code, - const char *msg) +transmit_status (struct GNUNET_SERVER_Client *client, int code, const char *msg) { struct StatusMessage *sm; size_t slen; -#if DEBUG_DATASTORE GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Transmitting `%s' message with value %d and message `%s'\n", - "STATUS", - code, - msg != NULL ? msg : "(none)"); -#endif - slen = (msg == NULL) ? 0 : strlen(msg) + 1; - sm = GNUNET_malloc (sizeof(struct StatusMessage) + slen); - sm->header.size = htons(sizeof(struct StatusMessage) + slen); - sm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_STATUS); - sm->status = htonl(code); + "Transmitting `%s' message with value %d and message `%s'\n", + "STATUS", code, msg != NULL ? msg : "(none)"); + slen = (msg == NULL) ? 0 : strlen (msg) + 1; + sm = GNUNET_malloc (sizeof (struct StatusMessage) + slen); + sm->header.size = htons (sizeof (struct StatusMessage) + slen); + sm->header.type = htons (GNUNET_MESSAGE_TYPE_DATASTORE_STATUS); + sm->status = htonl (code); + sm->min_expiration = GNUNET_TIME_absolute_hton (min_expiration); if (slen > 0) - memcpy (&sm[1], msg, slen); - transmit (client, &sm->header, NULL, NULL, GNUNET_YES); + memcpy (&sm[1], msg, slen); + transmit (client, &sm->header); } -/** - * Function called once the transmit operation has - * either failed or succeeded. - * - * @param next_cls closure for calling "next_request" callback - * @param status GNUNET_OK on success, GNUNET_SYSERR on error - */ -static void -get_next(void *next_cls, - int status) -{ - if (status != GNUNET_OK) - { - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - _("Failed to transmit an item to the client; aborting iteration.\n")); - if (plugin != NULL) - plugin->api->next_request (next_cls, GNUNET_YES); - return; - } - plugin->api->next_request (next_cls, GNUNET_NO); -} - /** * Function that will transmit the given datastore entry * to the client. * * @param cls closure, pointer to the client (of type GNUNET_SERVER_Client). - * @param next_cls closure to use to ask for the next item * @param key key for the content * @param size number of bytes in data * @param data content stored @@ -611,54 +581,52 @@ get_next(void *next_cls, * GNUNET_NO to delete the item and continue (if supported) */ static int -transmit_item (void *cls, - void *next_cls, - const GNUNET_HashCode * key, - uint32_t size, - const void *data, - uint32_t type, - uint32_t priority, - uint32_t anonymity, - struct GNUNET_TIME_Absolute - expiration, uint64_t uid) +transmit_item (void *cls, const struct GNUNET_HashCode * key, uint32_t size, + const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, + uint32_t anonymity, struct GNUNET_TIME_Absolute expiration, + uint64_t uid) { struct GNUNET_SERVER_Client *client = cls; struct GNUNET_MessageHeader *end; struct DataMessage *dm; if (key == NULL) - { - /* transmit 'DATA_END' */ -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Transmitting `%s' message\n", - "DATA_END"); -#endif - end = GNUNET_malloc (sizeof(struct GNUNET_MessageHeader)); - end->size = htons(sizeof(struct GNUNET_MessageHeader)); - end->type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END); - transmit (client, end, NULL, NULL, GNUNET_YES); - GNUNET_SERVER_client_drop (client); - return GNUNET_OK; - } - dm = GNUNET_malloc (sizeof(struct DataMessage) + size); - dm->header.size = htons(sizeof(struct DataMessage) + size); - dm->header.type = htons(GNUNET_MESSAGE_TYPE_DATASTORE_DATA); - dm->rid = htonl(0); - dm->size = htonl(size); - dm->type = htonl(type); - dm->priority = htonl(priority); - dm->anonymity = htonl(anonymity); - dm->expiration = GNUNET_TIME_absolute_hton(expiration); - dm->uid = GNUNET_htonll(uid); + { + /* transmit 'DATA_END' */ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transmitting `%s' message\n", + "DATA_END"); + end = GNUNET_malloc (sizeof (struct GNUNET_MessageHeader)); + end->size = htons (sizeof (struct GNUNET_MessageHeader)); + end->type = htons (GNUNET_MESSAGE_TYPE_DATASTORE_DATA_END); + transmit (client, end); + GNUNET_SERVER_client_drop (client); + return GNUNET_OK; + } + GNUNET_assert (sizeof (struct DataMessage) + size < + GNUNET_SERVER_MAX_MESSAGE_SIZE); + dm = GNUNET_malloc (sizeof (struct DataMessage) + size); + dm->header.size = htons (sizeof (struct DataMessage) + size); + dm->header.type = htons (GNUNET_MESSAGE_TYPE_DATASTORE_DATA); + dm->rid = htonl (0); + dm->size = htonl (size); + dm->type = htonl (type); + dm->priority = htonl (priority); + dm->anonymity = htonl (anonymity); + dm->replication = htonl (0); + dm->reserved = htonl (0); + dm->expiration = GNUNET_TIME_absolute_hton (expiration); + dm->uid = GNUNET_htonll (uid); dm->key = *key; memcpy (&dm[1], data, size); -#if DEBUG_DATASTORE GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Transmitting `%s' message\n", - "DATA"); -#endif - transmit (client, &dm->header, &get_next, next_cls, GNUNET_NO); + "Transmitting `%s' message for `%s' of type %u with expiration %llu (now: %llu)\n", + "DATA", GNUNET_h2s (key), type, + (unsigned long long) expiration.abs_value, + (unsigned long long) GNUNET_TIME_absolute_get ().abs_value); + GNUNET_STATISTICS_update (stats, gettext_noop ("# results found"), 1, + GNUNET_NO); + transmit (client, &dm->header); + GNUNET_SERVER_client_drop (client); return GNUNET_OK; } @@ -671,59 +639,62 @@ transmit_item (void *cls, * @param message the actual message */ static void -handle_reserve (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_reserve (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { - const struct ReserveMessage *msg = (const struct ReserveMessage*) message; + /** + * Static counter to produce reservation identifiers. + */ + static int reservation_gen; + + const struct ReserveMessage *msg = (const struct ReserveMessage *) message; struct ReservationList *e; unsigned long long used; unsigned long long req; uint64_t amount; uint32_t entries; -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "RESERVE"); -#endif - amount = GNUNET_ntohll(msg->amount); - entries = ntohl(msg->entries); - used = plugin->api->get_size (plugin->api->cls) + reserved; - req = amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * entries; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request\n", "RESERVE"); + amount = GNUNET_ntohll (msg->amount); + entries = ntohl (msg->entries); + used = payload + reserved; + req = + amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * entries; if (used + req > quota) + { + if (quota < used) + used = quota; /* cheat a bit for error message (to avoid negative numbers) */ + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + _ + ("Insufficient space (%llu bytes are available) to satisfy `%s' request for %llu bytes\n"), + quota - used, "RESERVE", req); + if (cache_size < req) { - if (quota < used) - used = quota; /* cheat a bit for error message (to avoid negative numbers) */ + /* TODO: document this in the FAQ; essentially, if this + * message happens, the insertion request could be blocked + * by less-important content from migration because it is + * larger than 1/8th of the overall available space, and + * we only reserve 1/8th for "fresh" insertions */ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - _("Insufficient space (%llu bytes are available) to satisfy `%s' request for %llu bytes\n"), - quota - used, - "RESERVE", - req); - if (cache_size < req) - { - /* TODO: document this in the FAQ; essentially, if this - message happens, the insertion request could be blocked - by less-important content from migration because it is - larger than 1/8th of the overall available space, and - we only reserve 1/8th for "fresh" insertions */ - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - _("The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"), - req, - cache_size); - transmit_status (client, 0, - gettext_noop ("Insufficient space to satisfy request and " - "requested amount is larger than cache size")); - } - else - { - transmit_status (client, 0, - gettext_noop ("Insufficient space to satisfy request")); - } - return; + _ + ("The requested amount (%llu bytes) is larger than the cache size (%llu bytes)\n"), + req, cache_size); + transmit_status (client, 0, + gettext_noop + ("Insufficient space to satisfy request and " + "requested amount is larger than cache size")); + } + else + { + transmit_status (client, 0, + gettext_noop ("Insufficient space to satisfy request")); } + return; + } reserved += req; - e = GNUNET_malloc (sizeof(struct ReservationList)); + GNUNET_STATISTICS_set (stats, gettext_noop ("# reserved"), reserved, + GNUNET_NO); + e = GNUNET_malloc (sizeof (struct ReservationList)); e->next = reservations; reservations = e; e->client = client; @@ -731,7 +702,7 @@ handle_reserve (void *cls, e->entries = entries; e->rid = ++reservation_gen; if (reservation_gen < 0) - reservation_gen = 0; /* wrap around */ + reservation_gen = 0; /* wrap around */ transmit_status (client, e->rid, NULL); } @@ -744,49 +715,49 @@ handle_reserve (void *cls, * @param message the actual message */ static void -handle_release_reserve (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_release_reserve (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { - const struct ReleaseReserveMessage *msg = (const struct ReleaseReserveMessage*) message; + const struct ReleaseReserveMessage *msg = + (const struct ReleaseReserveMessage *) message; struct ReservationList *pos; struct ReservationList *prev; struct ReservationList *next; - int rid = ntohl(msg->rid); + int rid = ntohl (msg->rid); unsigned long long rem; -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "RELEASE_RESERVE"); -#endif + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request\n", + "RELEASE_RESERVE"); next = reservations; prev = NULL; while (NULL != (pos = next)) + { + next = pos->next; + if (rid == pos->rid) { - next = pos->next; - if (rid == pos->rid) - { - if (prev == NULL) - reservations = next; - else - prev->next = next; - rem = pos->amount + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries; - GNUNET_assert (reserved >= rem); - reserved -= rem; -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Returning %llu remaining reserved bytes to storage pool\n", - rem); -#endif - GNUNET_free (pos); - transmit_status (client, GNUNET_OK, NULL); - return; - } - prev = pos; + if (prev == NULL) + reservations = next; + else + prev->next = next; + rem = + pos->amount + + ((unsigned long long) GNUNET_DATASTORE_ENTRY_OVERHEAD) * pos->entries; + GNUNET_assert (reserved >= rem); + reserved -= rem; + GNUNET_STATISTICS_set (stats, gettext_noop ("# reserved"), reserved, + GNUNET_NO); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Returning %llu remaining reserved bytes to storage pool\n", + rem); + GNUNET_free (pos); + transmit_status (client, GNUNET_OK, NULL); + return; } + prev = pos; + } GNUNET_break (0); - transmit_status (client, GNUNET_SYSERR, gettext_noop ("Could not find matching reservation")); + transmit_status (client, GNUNET_SYSERR, + gettext_noop ("Could not find matching reservation")); } @@ -802,23 +773,148 @@ check_data (const struct GNUNET_MessageHeader *message) uint32_t dsize; const struct DataMessage *dm; - size = ntohs(message->size); - if (size < sizeof(struct DataMessage)) - { - GNUNET_break (0); - return NULL; - } + size = ntohs (message->size); + if (size < sizeof (struct DataMessage)) + { + GNUNET_break (0); + return NULL; + } dm = (const struct DataMessage *) message; - dsize = ntohl(dm->size); - if (size != dsize + sizeof(struct DataMessage)) - { - GNUNET_break (0); - return NULL; - } + dsize = ntohl (dm->size); + if (size != dsize + sizeof (struct DataMessage)) + { + GNUNET_break (0); + return NULL; + } return dm; } +/** + * Context for a PUT request used to see if the content is + * already present. + */ +struct PutContext +{ + /** + * Client to notify on completion. + */ + struct GNUNET_SERVER_Client *client; + +#if ! HAVE_UNALIGNED_64_ACCESS + void *reserved; +#endif + + /* followed by the 'struct DataMessage' */ +}; + + +/** + * Actually put the data message. + * + * @param client sender of the message + * @param dm message with the data to store + */ +static void +execute_put (struct GNUNET_SERVER_Client *client, const struct DataMessage *dm) +{ + uint32_t size; + char *msg; + int ret; + + size = ntohl (dm->size); + msg = NULL; + ret = + plugin->api->put (plugin->api->cls, &dm->key, size, &dm[1], + ntohl (dm->type), ntohl (dm->priority), + ntohl (dm->anonymity), ntohl (dm->replication), + GNUNET_TIME_absolute_ntoh (dm->expiration), &msg); + if (GNUNET_OK == ret) + { + GNUNET_STATISTICS_update (stats, gettext_noop ("# bytes stored"), size, + GNUNET_YES); + GNUNET_CONTAINER_bloomfilter_add (filter, &dm->key); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Successfully stored %u bytes of type %u under key `%s'\n", + size, ntohl (dm->type), GNUNET_h2s (&dm->key)); + } + transmit_status (client, ret, msg); + GNUNET_free_non_null (msg); + if (quota - reserved - cache_size < payload) + { + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + _("Need %llu bytes more space (%llu allowed, using %llu)\n"), + (unsigned long long) size + GNUNET_DATASTORE_ENTRY_OVERHEAD, + (unsigned long long) (quota - reserved - cache_size), + (unsigned long long) payload); + manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD); + } +} + + +/** + * Function that will check if the given datastore entry + * matches the put and if none match executes the put. + * + * @param cls closure, pointer to the client (of type 'struct PutContext'). + * @param key key for the content + * @param size number of bytes in data + * @param data content stored + * @param type type of the content + * @param priority priority of the content + * @param anonymity anonymity-level for the content + * @param expiration expiration time for the content + * @param uid unique identifier for the datum; + * maybe 0 if no unique identifier is available + * + * @return GNUNET_OK usually + * GNUNET_NO to delete the item + */ +static int +check_present (void *cls, const struct GNUNET_HashCode * key, uint32_t size, + const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority, + uint32_t anonymity, struct GNUNET_TIME_Absolute expiration, + uint64_t uid) +{ + struct PutContext *pc = cls; + const struct DataMessage *dm; + + dm = (const struct DataMessage *) &pc[1]; + if (key == NULL) + { + execute_put (pc->client, dm); + GNUNET_SERVER_client_drop (pc->client); + GNUNET_free (pc); + return GNUNET_OK; + } + if ((GNUNET_BLOCK_TYPE_FS_DBLOCK == type) || + (GNUNET_BLOCK_TYPE_FS_IBLOCK == type) || ((size == ntohl (dm->size)) && + (0 == + memcmp (&dm[1], data, size)))) + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Result already present in datastore\n"); + /* FIXME: change API to allow increasing 'replication' counter */ + if ((ntohl (dm->priority) > 0) || + (GNUNET_TIME_absolute_ntoh (dm->expiration).abs_value > + expiration.abs_value)) + plugin->api->update (plugin->api->cls, uid, + (int32_t) ntohl (dm->priority), + GNUNET_TIME_absolute_ntoh (dm->expiration), NULL); + transmit_status (pc->client, GNUNET_NO, NULL); + GNUNET_SERVER_client_drop (pc->client); + GNUNET_free (pc); + } + else + { + execute_put (pc->client, dm); + GNUNET_SERVER_client_drop (pc->client); + GNUNET_free (pc); + } + return GNUNET_OK; +} + + /** * Handle PUT-message. * @@ -827,78 +923,57 @@ check_data (const struct GNUNET_MessageHeader *message) * @param message the actual message */ static void -handle_put (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_put (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { const struct DataMessage *dm = check_data (message); - char *msg; - int ret; int rid; struct ReservationList *pos; + struct PutContext *pc; + struct GNUNET_HashCode vhash; uint32_t size; -#if DEBUG_DATASTORE + if ((dm == NULL) || (ntohl (dm->type) == 0)) + { + GNUNET_break (0); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + return; + } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "PUT"); -#endif - if (ntohl(dm->type) == 0) - { - GNUNET_break (0); - dm = NULL; - } - if (dm == NULL) - { - GNUNET_break (0); - GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); - return; - } - rid = ntohl(dm->rid); - size = ntohl(dm->size); + "Processing `%s' request for `%s' of type %u\n", "PUT", + GNUNET_h2s (&dm->key), ntohl (dm->type)); + rid = ntohl (dm->rid); + size = ntohl (dm->size); if (rid > 0) + { + pos = reservations; + while ((NULL != pos) && (rid != pos->rid)) + pos = pos->next; + GNUNET_break (pos != NULL); + if (NULL != pos) { - pos = reservations; - while ( (NULL != pos) && - (rid != pos->rid) ) - pos = pos->next; - GNUNET_break (pos != NULL); - if (NULL != pos) - { - GNUNET_break (pos->entries > 0); - GNUNET_break (pos->amount > size); - pos->entries--; - pos->amount -= size; - reserved -= (size + GNUNET_DATASTORE_ENTRY_OVERHEAD); - } + GNUNET_break (pos->entries > 0); + GNUNET_break (pos->amount >= size); + pos->entries--; + pos->amount -= size; + reserved -= (size + GNUNET_DATASTORE_ENTRY_OVERHEAD); + GNUNET_STATISTICS_set (stats, gettext_noop ("# reserved"), reserved, + GNUNET_NO); } - msg = NULL; - ret = plugin->api->put (plugin->api->cls, - &dm->key, - size, - &dm[1], - ntohl(dm->type), - ntohl(dm->priority), - ntohl(dm->anonymity), - GNUNET_TIME_absolute_ntoh(dm->expiration), - &msg); - if (GNUNET_OK == ret) - { - GNUNET_CONTAINER_bloomfilter_add (filter, - &dm->key); -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Successfully stored %u bytes under key `%s'\n", - size, - GNUNET_h2s (&dm->key)); -#endif - } - transmit_status (client, - (GNUNET_SYSERR == ret) ? GNUNET_SYSERR : GNUNET_OK, - msg); - GNUNET_free_non_null (msg); - if (quota - reserved - cache_size < plugin->api->get_size (plugin->api->cls)) - manage_space (size + GNUNET_DATASTORE_ENTRY_OVERHEAD); + } + if (GNUNET_YES == GNUNET_CONTAINER_bloomfilter_test (filter, &dm->key)) + { + GNUNET_CRYPTO_hash (&dm[1], size, &vhash); + pc = GNUNET_malloc (sizeof (struct PutContext) + size + + sizeof (struct DataMessage)); + pc->client = client; + GNUNET_SERVER_client_keep (client); + memcpy (&pc[1], dm, size + sizeof (struct DataMessage)); + plugin->api->get_key (plugin->api->cls, 0, &dm->key, &vhash, + ntohl (dm->type), &check_present, pc); + return; + } + execute_put (client, dm); } @@ -910,51 +985,46 @@ handle_put (void *cls, * @param message the actual message */ static void -handle_get (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_get (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { const struct GetMessage *msg; uint16_t size; -#if DEBUG_DATASTORE + size = ntohs (message->size); + if ((size != sizeof (struct GetMessage)) && + (size != sizeof (struct GetMessage) - sizeof (struct GNUNET_HashCode))) + { + GNUNET_break (0); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + return; + } + msg = (const struct GetMessage *) message; GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "GET"); -#endif - size = ntohs(message->size); - if ( (size != sizeof(struct GetMessage)) && - (size != sizeof(struct GetMessage) - sizeof(GNUNET_HashCode)) ) - { - GNUNET_break (0); - GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); - return; - } - msg = (const struct GetMessage*) message; - if ( (size == sizeof(struct GetMessage)) && - (GNUNET_YES != GNUNET_CONTAINER_bloomfilter_test (filter, - &msg->key)) ) - { - /* don't bother database... */ -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Empty result set for `%s' request for `%s'.\n", - "GET", - GNUNET_h2s (&msg->key)); -#endif - GNUNET_SERVER_client_keep (client); - transmit_item (client, - NULL, NULL, 0, NULL, 0, 0, 0, - GNUNET_TIME_UNIT_ZERO_ABS, 0); - return; - } + "Processing `%s' request for `%s' of type %u\n", "GET", + GNUNET_h2s (&msg->key), ntohl (msg->type)); + GNUNET_STATISTICS_update (stats, gettext_noop ("# GET requests received"), 1, + GNUNET_NO); GNUNET_SERVER_client_keep (client); - plugin->api->get (plugin->api->cls, - ((size == sizeof(struct GetMessage)) ? &msg->key : NULL), - NULL, - ntohl(msg->type), - &transmit_item, - client); + if ((size == sizeof (struct GetMessage)) && + (GNUNET_YES != GNUNET_CONTAINER_bloomfilter_test (filter, &msg->key))) + { + /* don't bother database... */ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Empty result set for `%s' request for `%s' (bloomfilter).\n", + "GET", GNUNET_h2s (&msg->key)); + GNUNET_STATISTICS_update (stats, + gettext_noop + ("# requests filtered by bloomfilter"), 1, + GNUNET_NO); + transmit_item (client, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, + 0); + return; + } + plugin->api->get_key (plugin->api->cls, GNUNET_ntohll (msg->offset), + ((size == + sizeof (struct GetMessage)) ? &msg->key : NULL), NULL, + ntohl (msg->type), &transmit_item, client); } @@ -966,71 +1036,83 @@ handle_get (void *cls, * @param message the actual message */ static void -handle_update (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_update (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { const struct UpdateMessage *msg; int ret; char *emsg; -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "UPDATE"); -#endif - msg = (const struct UpdateMessage*) message; + GNUNET_STATISTICS_update (stats, gettext_noop ("# UPDATE requests received"), + 1, GNUNET_NO); + msg = (const struct UpdateMessage *) message; emsg = NULL; - ret = plugin->api->update (plugin->api->cls, - GNUNET_ntohll(msg->uid), - (int32_t) ntohl(msg->priority), - GNUNET_TIME_absolute_ntoh(msg->expiration), - &emsg); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request for %llu\n", + "UPDATE", (unsigned long long) GNUNET_ntohll (msg->uid)); + ret = + plugin->api->update (plugin->api->cls, GNUNET_ntohll (msg->uid), + (int32_t) ntohl (msg->priority), + GNUNET_TIME_absolute_ntoh (msg->expiration), &emsg); transmit_status (client, ret, emsg); GNUNET_free_non_null (emsg); } /** - * Handle GET_RANDOM-message. + * Handle GET_REPLICATION-message. * * @param cls closure * @param client identification of the client * @param message the actual message */ static void -handle_get_random (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_get_replication (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "GET_RANDOM"); -#endif + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request\n", + "GET_REPLICATION"); + GNUNET_STATISTICS_update (stats, + gettext_noop + ("# GET REPLICATION requests received"), 1, + GNUNET_NO); GNUNET_SERVER_client_keep (client); - plugin->api->iter_migration_order (plugin->api->cls, - 0, - &transmit_item, - client); + plugin->api->get_replication (plugin->api->cls, &transmit_item, client); } /** - * Context for the 'remove_callback'. + * Handle GET_ZERO_ANONYMITY-message. + * + * @param cls closure + * @param client identification of the client + * @param message the actual message */ -struct RemoveContext +static void +handle_get_zero_anonymity (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { - /** - * Client for whom we're doing the remvoing. - */ - struct GNUNET_SERVER_Client *client; - - /** - * GNUNET_YES if we managed to remove something. - */ - int found; -}; + const struct GetZeroAnonymityMessage *msg = + (const struct GetZeroAnonymityMessage *) message; + enum GNUNET_BLOCK_Type type; + + type = (enum GNUNET_BLOCK_Type) ntohl (msg->type); + if (type == GNUNET_BLOCK_TYPE_ANY) + { + GNUNET_break (0); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + return; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request\n", + "GET_ZERO_ANONYMITY"); + GNUNET_STATISTICS_update (stats, + gettext_noop + ("# GET ZERO ANONYMITY requests received"), 1, + GNUNET_NO); + GNUNET_SERVER_client_keep (client); + plugin->api->get_zero_anonymity (plugin->api->cls, + GNUNET_ntohll (msg->offset), type, + &transmit_item, client); +} /** @@ -1038,44 +1120,30 @@ struct RemoveContext * in to be deleted (by returning GNUNET_NO). */ static int -remove_callback (void *cls, - void *next_cls, - const GNUNET_HashCode * key, - uint32_t size, - const void *data, - uint32_t type, - uint32_t priority, - uint32_t anonymity, - struct GNUNET_TIME_Absolute - expiration, uint64_t uid) +remove_callback (void *cls, const struct GNUNET_HashCode * key, uint32_t size, + const void *data, enum GNUNET_BLOCK_Type type, + uint32_t priority, uint32_t anonymity, + struct GNUNET_TIME_Absolute expiration, uint64_t uid) { - struct RemoveContext *rc = cls; + struct GNUNET_SERVER_Client *client = cls; if (key == NULL) - { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "No further matches for `%s' request.\n", - "REMOVE"); -#endif - if (GNUNET_YES == rc->found) - transmit_status (rc->client, GNUNET_OK, NULL); - else - transmit_status (rc->client, GNUNET_NO, _("Content not found")); - GNUNET_SERVER_client_drop (rc->client); - GNUNET_free (rc); - return GNUNET_OK; /* last item */ - } - rc->found = GNUNET_YES; -#if DEBUG_DATASTORE + { + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "No further matches for `%s' request.\n", "REMOVE"); + transmit_status (client, GNUNET_NO, _("Content not found")); + GNUNET_SERVER_client_drop (client); + return GNUNET_OK; /* last item */ + } GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Item %llu matches `%s' request.\n", - (unsigned long long) uid, - "REMOVE"); -#endif - GNUNET_CONTAINER_bloomfilter_remove (filter, - key); - plugin->api->next_request (next_cls, GNUNET_YES); + "Item %llu matches `%s' request for key `%s' and type %u.\n", + (unsigned long long) uid, "REMOVE", GNUNET_h2s (key), type); + GNUNET_STATISTICS_update (stats, + gettext_noop ("# bytes removed (explicit request)"), + size, GNUNET_YES); + GNUNET_CONTAINER_bloomfilter_remove (filter, key); + transmit_status (client, GNUNET_OK, NULL); + GNUNET_SERVER_client_drop (client); return GNUNET_NO; } @@ -1088,37 +1156,28 @@ remove_callback (void *cls, * @param message the actual message */ static void -handle_remove (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_remove (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { const struct DataMessage *dm = check_data (message); - GNUNET_HashCode vhash; - struct RemoveContext *rc; + struct GNUNET_HashCode vhash; -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "REMOVE"); -#endif if (dm == NULL) - { - GNUNET_break (0); - GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); - return; - } - rc = GNUNET_malloc (sizeof(struct RemoveContext)); + { + GNUNET_break (0); + GNUNET_SERVER_receive_done (client, GNUNET_SYSERR); + return; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Processing `%s' request for `%s' of type %u\n", "REMOVE", + GNUNET_h2s (&dm->key), ntohl (dm->type)); + GNUNET_STATISTICS_update (stats, gettext_noop ("# REMOVE requests received"), + 1, GNUNET_NO); GNUNET_SERVER_client_keep (client); - rc->client = client; - GNUNET_CRYPTO_hash (&dm[1], - ntohl(dm->size), - &vhash); - plugin->api->get (plugin->api->cls, - &dm->key, - &vhash, - ntohl(dm->type), - &remove_callback, - rc); + GNUNET_CRYPTO_hash (&dm[1], ntohl (dm->size), &vhash); + plugin->api->get_key (plugin->api->cls, 0, &dm->key, &vhash, + (enum GNUNET_BLOCK_Type) ntohl (dm->type), + &remove_callback, client); } @@ -1130,81 +1189,106 @@ handle_remove (void *cls, * @param message the actual message */ static void -handle_drop (void *cls, - struct GNUNET_SERVER_Client *client, - const struct GNUNET_MessageHeader *message) +handle_drop (void *cls, struct GNUNET_SERVER_Client *client, + const struct GNUNET_MessageHeader *message) { -#if DEBUG_DATASTORE - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "Processing `%s' request\n", - "DROP"); -#endif - plugin->api->drop (plugin->api->cls); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' request\n", "DROP"); + do_drop = GNUNET_YES; GNUNET_SERVER_receive_done (client, GNUNET_OK); } /** - * List of handlers for the messages understood by this - * service. + * Function called by plugins to notify us about a + * change in their disk utilization. + * + * @param cls closure (NULL) + * @param delta change in disk utilization, + * 0 for "reset to empty" */ -static struct GNUNET_SERVER_MessageHandler handlers[] = { - {&handle_reserve, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE, - sizeof(struct ReserveMessage) }, - {&handle_release_reserve, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE, - sizeof(struct ReleaseReserveMessage) }, - {&handle_put, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_PUT, 0 }, - {&handle_update, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE, - sizeof (struct UpdateMessage) }, - {&handle_get, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_GET, 0 }, - {&handle_get_random, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_GET_RANDOM, - sizeof(struct GNUNET_MessageHeader) }, - {&handle_remove, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE, 0 }, - {&handle_drop, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_DROP, - sizeof(struct GNUNET_MessageHeader) }, - {NULL, NULL, 0, 0} -}; +static void +disk_utilization_change_cb (void *cls, int delta) +{ + if ((delta < 0) && (payload < -delta)) + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + _ + ("Datastore payload inaccurate (%lld < %lld). Trying to fix.\n"), + (long long) payload, (long long) -delta); + payload = plugin->api->estimate_size (plugin->api->cls); + sync_stats (); + return; + } + payload += delta; + lastSync++; + if (lastSync >= MAX_STAT_SYNC_LAG) + sync_stats (); +} +/** + * Callback function to process statistic values. + * + * @param cls closure (struct Plugin*) + * @param subsystem name of subsystem that created the statistic + * @param name the name of the datum + * @param value the current value + * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not + * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration + */ +static int +process_stat_in (void *cls, const char *subsystem, const char *name, + uint64_t value, int is_persistent) +{ + GNUNET_assert (stats_worked == GNUNET_NO); + stats_worked = GNUNET_YES; + payload += value; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Notification from statistics about existing payload (%llu), new payload is %llu\n", + value, payload); + return GNUNET_OK; +} + + +static void +process_stat_done (void *cls, int success) +{ + struct DatastorePlugin *plugin = cls; + + stat_get = NULL; + if (stats_worked == GNUNET_NO) + payload = plugin->api->estimate_size (plugin->api->cls); +} + /** * Load the datastore plugin. */ static struct DatastorePlugin * -load_plugin () +load_plugin () { struct DatastorePlugin *ret; char *libname; - char *name; - if (GNUNET_OK != - GNUNET_CONFIGURATION_get_value_string (cfg, - "DATASTORE", "DATABASE", &name)) - { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("No `%s' specified for `%s' in configuration!\n"), - "DATABASE", - "DATASTORE"); - return NULL; - } - ret = GNUNET_malloc (sizeof(struct DatastorePlugin)); + ret = GNUNET_malloc (sizeof (struct DatastorePlugin)); ret->env.cfg = cfg; - ret->env.sched = sched; - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - _("Loading `%s' datastore plugin\n"), name); - GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", name); - ret->short_name = name; + ret->env.duc = &disk_utilization_change_cb; + ret->env.cls = NULL; + GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Loading `%s' datastore plugin\n"), + plugin_name); + GNUNET_asprintf (&libname, "libgnunet_plugin_datastore_%s", plugin_name); + ret->short_name = GNUNET_strdup (plugin_name); ret->lib_name = libname; ret->api = GNUNET_PLUGIN_load (libname, &ret->env); if (ret->api == NULL) - { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("Failed to load datastore plugin for `%s'\n"), name); - GNUNET_free (ret->short_name); - GNUNET_free (libname); - GNUNET_free (ret); - return NULL; - } + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("Failed to load datastore plugin for `%s'\n"), plugin_name); + GNUNET_free (ret->short_name); + GNUNET_free (libname); + GNUNET_free (ret); + return NULL; + } return ret; } @@ -1218,38 +1302,78 @@ load_plugin () static void unload_plugin (struct DatastorePlugin *plug) { -#if DEBUG_DATASTORE GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Datastore service is unloading plugin...\n"); -#endif GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api)); GNUNET_free (plug->lib_name); GNUNET_free (plug->short_name); GNUNET_free (plug); + GNUNET_free (quota_stat_name); + quota_stat_name = NULL; } /** - * Last task run during shutdown. Disconnects us from - * the transport and core. + * Final task run after shutdown. Unloads plugins and disconnects us from + * statistics. */ static void -cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +unload_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) { - if (expired_kill_task != GNUNET_SCHEDULER_NO_TASK) - { - GNUNET_SCHEDULER_cancel (sched, - expired_kill_task); - expired_kill_task = GNUNET_SCHEDULER_NO_TASK; - } + if (lastSync > 0) + sync_stats (); + if (GNUNET_YES == do_drop) + plugin->api->drop (plugin->api->cls); unload_plugin (plugin); plugin = NULL; if (filter != NULL) + { + GNUNET_CONTAINER_bloomfilter_free (filter); + filter = NULL; + } + if (stat_get != NULL) + { + GNUNET_STATISTICS_get_cancel (stat_get); + stat_get = NULL; + } + if (stats != NULL) + { + GNUNET_STATISTICS_destroy (stats, GNUNET_YES); + stats = NULL; + } + GNUNET_free_non_null (plugin_name); + plugin_name = NULL; +} + + +/** + * Last task run during shutdown. Disconnects us from + * the transport and core. + */ +static void +cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) +{ + struct TransmitCallbackContext *tcc; + + cleaning_done = GNUNET_YES; + while (NULL != (tcc = tcc_head)) + { + GNUNET_CONTAINER_DLL_remove (tcc_head, tcc_tail, tcc); + if (tcc->th != NULL) { - GNUNET_CONTAINER_bloomfilter_free (filter); - filter = NULL; + GNUNET_SERVER_notify_transmit_ready_cancel (tcc->th); + GNUNET_SERVER_client_drop (tcc->client); } - GNUNET_ARM_stop_services (cfg, tc->sched, "statistics", NULL); + GNUNET_free (tcc->msg); + GNUNET_free (tcc); + } + if (expired_kill_task != GNUNET_SCHEDULER_NO_TASK) + { + GNUNET_SCHEDULER_cancel (expired_kill_task); + expired_kill_task = GNUNET_SCHEDULER_NO_TASK; + } + GNUNET_SCHEDULER_add_continuation (&unload_task, NULL, + GNUNET_SCHEDULER_REASON_PREREQ_DONE); } @@ -1262,9 +1386,7 @@ cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) * @param client identification of the client */ static void -cleanup_reservations (void *cls, - struct GNUNET_SERVER_Client - * client) +cleanup_reservations (void *cls, struct GNUNET_SERVER_Client *client) { struct ReservationList *pos; struct ReservationList *prev; @@ -1275,130 +1397,228 @@ cleanup_reservations (void *cls, prev = NULL; pos = reservations; while (NULL != pos) + { + next = pos->next; + if (pos->client == client) { - next = pos->next; - if (pos->client == client) - { - if (prev == NULL) - reservations = next; - else - prev->next = next; - reserved -= pos->amount + pos->entries * GNUNET_DATASTORE_ENTRY_OVERHEAD; - GNUNET_free (pos); - } + if (prev == NULL) + reservations = next; else - { - prev = pos; - } - pos = next; + prev->next = next; + reserved -= pos->amount + pos->entries * GNUNET_DATASTORE_ENTRY_OVERHEAD; + GNUNET_free (pos); } + else + { + prev = pos; + } + pos = next; + } + GNUNET_STATISTICS_set (stats, gettext_noop ("# reserved"), reserved, + GNUNET_NO); } /** - * Function that removes all active reservations made - * by the given client and releases the space for other - * requests. + * Adds a given key to the bloomfilter 'count' times. * - * @param cls closure - * @param client identification of the client + * @param cls the bloomfilter + * @param key key to add + * @param count number of times to add key */ static void -cleanup_transmits (void *cls, - struct GNUNET_SERVER_Client - * client) +add_key_to_bloomfilter (void *cls, + const struct GNUNET_HashCode *key, + unsigned int count) { - struct TransmitCallbackContext *tcc; - - while (NULL != (tcc = tcc_head)) - { - GNUNET_CONTAINER_DLL_remove (tcc_head, - tcc_tail, - tcc); - if (tcc->th != NULL) - GNUNET_CONNECTION_notify_transmit_ready_cancel (tcc->th); - GNUNET_free (tcc->msg); - GNUNET_free (tcc); - } - + struct GNUNET_CONTAINER_BloomFilter *bf = cls; + while (0 < count--) + GNUNET_CONTAINER_bloomfilter_add (bf, key); } - /** * Process datastore requests. * * @param cls closure - * @param s scheduler to use * @param server the initialized server * @param c configuration to use */ static void -run (void *cls, - struct GNUNET_SCHEDULER_Handle *s, - struct GNUNET_SERVER_Handle *server, +run (void *cls, struct GNUNET_SERVER_Handle *server, const struct GNUNET_CONFIGURATION_Handle *c) { - char *fn; + static const struct GNUNET_SERVER_MessageHandler handlers[] = { + {&handle_reserve, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE, + sizeof (struct ReserveMessage)}, + {&handle_release_reserve, NULL, + GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE, + sizeof (struct ReleaseReserveMessage)}, + {&handle_put, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_PUT, 0}, + {&handle_update, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE, + sizeof (struct UpdateMessage)}, + {&handle_get, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_GET, 0}, + {&handle_get_replication, NULL, + GNUNET_MESSAGE_TYPE_DATASTORE_GET_REPLICATION, + sizeof (struct GNUNET_MessageHeader)}, + {&handle_get_zero_anonymity, NULL, + GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY, + sizeof (struct GetZeroAnonymityMessage)}, + {&handle_remove, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE, 0}, + {&handle_drop, NULL, GNUNET_MESSAGE_TYPE_DATASTORE_DROP, + sizeof (struct GNUNET_MessageHeader)}, + {NULL, NULL, 0, 0} + }; + char *fn; + char *pfn; unsigned int bf_size; + int refresh_bf; - sched = s; cfg = c; if (GNUNET_OK != - GNUNET_CONFIGURATION_get_value_number (cfg, - "DATASTORE", "QUOTA", "a)) + GNUNET_CONFIGURATION_get_value_string (cfg, "DATASTORE", "DATABASE", + &plugin_name)) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("No `%s' specified for `%s' in configuration!\n"), "DATABASE", + "DATASTORE"); + return; + } + GNUNET_asprintf ("a_stat_name, + _("# bytes used in file-sharing datastore `%s'"), + plugin_name); + if (GNUNET_OK != + GNUNET_CONFIGURATION_get_value_size (cfg, "DATASTORE", "QUOTA", "a)) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("No `%s' specified for `%s' in configuration!\n"), "QUOTA", + "DATASTORE"); + return; + } + stats = GNUNET_STATISTICS_create ("datastore", cfg); + GNUNET_STATISTICS_set (stats, gettext_noop ("# quota"), quota, GNUNET_NO); + cache_size = quota / 8; /* Or should we make this an option? */ + GNUNET_STATISTICS_set (stats, gettext_noop ("# cache size"), cache_size, + GNUNET_NO); + if (quota / (32 * 1024LL) > (1 << 31)) + bf_size = (1 << 31); /* absolute limit: ~2 GB, beyond that BF just won't help anyway */ + else + bf_size = quota / (32 * 1024LL); /* 8 bit per entry, 1 bit per 32 kb in DB */ + fn = NULL; + if ((GNUNET_OK != + GNUNET_CONFIGURATION_get_value_filename (cfg, "DATASTORE", "BLOOMFILTER", + &fn)) || + (GNUNET_OK != GNUNET_DISK_directory_create_for_file (fn))) + { + GNUNET_log (GNUNET_ERROR_TYPE_WARNING, + _("Could not use specified filename `%s' for bloomfilter.\n"), + fn != NULL ? fn : ""); + GNUNET_free_non_null (fn); + fn = NULL; + } + if (fn != NULL) + { + GNUNET_asprintf (&pfn, "%s.%s", fn, plugin_name); + if (GNUNET_YES == GNUNET_DISK_file_test (pfn)) { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("No `%s' specified for `%s' in configuration!\n"), - "QUOTA", - "DATASTORE"); - return; + filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */ + if (NULL == filter) + { + /* file exists but not valid, remove and try again, but refresh */ + if (0 != UNLINK (pfn)) + { + /* failed to remove, run without file */ + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("Failed to remove bogus bloomfilter file `%s'\n"), + pfn); + GNUNET_free (pfn); + pfn = NULL; + filter = GNUNET_CONTAINER_bloomfilter_load (NULL, bf_size, 5); /* approx. 3% false positives at max use */ + refresh_bf = GNUNET_YES; + } + else + { + /* try again after remove */ + filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */ + refresh_bf = GNUNET_YES; + if (NULL == filter) + { + /* failed yet again, give up on using file */ + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("Failed to remove bogus bloomfilter file `%s'\n"), + pfn); + GNUNET_free (pfn); + pfn = NULL; + filter = GNUNET_CONTAINER_bloomfilter_load (NULL, bf_size, 5); /* approx. 3% false positives at max use */ + } + } + } + else + { + /* normal case: have an existing valid bf file, no need to refresh */ + refresh_bf = GNUNET_NO; + } } - cache_size = quota / 8; /* Or should we make this an option? */ - bf_size = quota / 32; /* 8 bit per entry, 1 bit per 32 kb in DB */ - fn = NULL; - if ( (GNUNET_OK != - GNUNET_CONFIGURATION_get_value_filename (cfg, - "DATASTORE", - "BLOOMFILTER", - &fn)) || - (GNUNET_OK != - GNUNET_DISK_directory_create_for_file (fn)) ) + else { - GNUNET_log (GNUNET_ERROR_TYPE_WARNING, - _("Could not use specified filename `%s' for bloomfilter.\n"), - fn != NULL ? fn : ""); - GNUNET_free_non_null (fn); - fn = NULL; + filter = GNUNET_CONTAINER_bloomfilter_load (pfn, bf_size, 5); /* approx. 3% false positives at max use */ + refresh_bf = GNUNET_YES; } - filter = GNUNET_CONTAINER_bloomfilter_load (fn, bf_size, 5); /* approx. 3% false positives at max use */ + GNUNET_free (pfn); + } + else + { + filter = GNUNET_CONTAINER_bloomfilter_init (NULL, bf_size, 5); /* approx. 3% false positives at max use */ + refresh_bf = GNUNET_YES; + } GNUNET_free_non_null (fn); if (filter == NULL) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("Failed to initialize bloomfilter.\n")); + if (stats != NULL) { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - _("Failed to initialize bloomfilter.\n")); - return; + GNUNET_STATISTICS_destroy (stats, GNUNET_YES); + stats = NULL; } - GNUNET_ARM_start_services (cfg, sched, "statistics", NULL); + return; + } plugin = load_plugin (); if (NULL == plugin) + { + GNUNET_CONTAINER_bloomfilter_free (filter); + filter = NULL; + if (stats != NULL) { - GNUNET_CONTAINER_bloomfilter_free (filter); - filter = NULL; - GNUNET_ARM_stop_services (cfg, sched, "statistics", NULL); - return; + GNUNET_STATISTICS_destroy (stats, GNUNET_YES); + stats = NULL; } + return; + } + stat_get = + GNUNET_STATISTICS_get (stats, "datastore", quota_stat_name, + GNUNET_TIME_UNIT_SECONDS, &process_stat_done, + &process_stat_in, plugin); GNUNET_SERVER_disconnect_notify (server, &cleanup_reservations, NULL); - GNUNET_SERVER_disconnect_notify (server, &cleanup_transmits, NULL); GNUNET_SERVER_add_handlers (server, handlers); - expired_kill_task - = GNUNET_SCHEDULER_add_with_priority (sched, - GNUNET_SCHEDULER_PRIORITY_IDLE, - &delete_expired, NULL); - GNUNET_SCHEDULER_add_delayed (sched, - GNUNET_TIME_UNIT_FOREVER_REL, - &cleaning_task, NULL); - + if (GNUNET_YES == refresh_bf) + { + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + _("Rebuilding bloomfilter. Please be patient.\n")); + if (NULL != plugin->api->get_keys) + plugin->api->get_keys (plugin->api->cls, &add_key_to_bloomfilter, filter); + else + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + _("Plugin does not support get_keys function. Please fix!\n")); + + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + _("Bloomfilter construction complete.\n")); + } + expired_kill_task = + GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE, + &delete_expired, NULL); + GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleaning_task, + NULL); } @@ -1414,12 +1634,10 @@ main (int argc, char *const *argv) { int ret; - ret = (GNUNET_OK == - GNUNET_SERVICE_run (argc, - argv, - "datastore", - GNUNET_SERVICE_OPTION_NONE, - &run, NULL)) ? 0 : 1; + ret = + (GNUNET_OK == + GNUNET_SERVICE_run (argc, argv, "datastore", GNUNET_SERVICE_OPTION_NONE, + &run, NULL)) ? 0 : 1; return ret; }