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Diffstat (limited to 'fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_partition.c')
| -rw-r--r-- | fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_partition.c | 4301 |
1 files changed, 4301 insertions, 0 deletions
diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_partition.c b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_partition.c new file mode 100644 index 00000000..46d2fb3e --- /dev/null +++ b/fluent-bit/lib/librdkafka-2.1.0/src/rdkafka_partition.c @@ -0,0 +1,4301 @@ +/* + * librdkafka - The Apache Kafka C/C++ library + * + * Copyright (c) 2015 Magnus Edenhill + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include "rdkafka_int.h" +#include "rdkafka_topic.h" +#include "rdkafka_broker.h" +#include "rdkafka_request.h" +#include "rdkafka_offset.h" +#include "rdkafka_partition.h" +#include "rdkafka_fetcher.h" +#include "rdregex.h" +#include "rdports.h" /* rd_qsort_r() */ + +#include "rdunittest.h" + +const char *rd_kafka_fetch_states[] = {"none", "stopping", + "stopped", "offset-query", + "offset-wait", "validate-epoch-wait", + "active"}; + + +static rd_kafka_op_res_t rd_kafka_toppar_op_serve(rd_kafka_t *rk, + rd_kafka_q_t *rkq, + rd_kafka_op_t *rko, + rd_kafka_q_cb_type_t cb_type, + void *opaque); + +static void rd_kafka_toppar_offset_retry(rd_kafka_toppar_t *rktp, + int backoff_ms, + const char *reason); + + +static RD_INLINE int32_t +rd_kafka_toppar_version_new_barrier0(rd_kafka_toppar_t *rktp, + const char *func, + int line) { + int32_t version = rd_atomic32_add(&rktp->rktp_version, 1); + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BARRIER", + "%s [%" PRId32 "]: %s:%d: new version barrier v%" PRId32, + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, func, + line, version); + return version; +} + +#define rd_kafka_toppar_version_new_barrier(rktp) \ + rd_kafka_toppar_version_new_barrier0(rktp, __FUNCTION__, __LINE__) + + +/** + * Toppar based OffsetResponse handling. + * This is used for updating the low water mark for consumer lag. + */ +static void rd_kafka_toppar_lag_handle_Offset(rd_kafka_t *rk, + rd_kafka_broker_t *rkb, + rd_kafka_resp_err_t err, + rd_kafka_buf_t *rkbuf, + rd_kafka_buf_t *request, + void *opaque) { + rd_kafka_toppar_t *rktp = opaque; + rd_kafka_topic_partition_list_t *offsets; + rd_kafka_topic_partition_t *rktpar; + + offsets = rd_kafka_topic_partition_list_new(1); + + /* Parse and return Offset */ + err = rd_kafka_handle_ListOffsets(rk, rkb, err, rkbuf, request, offsets, + NULL); + + if (err == RD_KAFKA_RESP_ERR__IN_PROGRESS) { + rd_kafka_topic_partition_list_destroy(offsets); + return; /* Retrying */ + } + + if (!err && !(rktpar = rd_kafka_topic_partition_list_find( + offsets, rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition))) + err = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + + if (!err && !rktpar->err) { + rd_kafka_toppar_lock(rktp); + rktp->rktp_lo_offset = rktpar->offset; + rd_kafka_toppar_unlock(rktp); + } + + rd_kafka_topic_partition_list_destroy(offsets); + + rktp->rktp_wait_consumer_lag_resp = 0; + + rd_kafka_toppar_destroy(rktp); /* from request.opaque */ +} + + + +/** + * Request information from broker to keep track of consumer lag. + * + * @locality toppar handle thread + * @locks none + */ +static void rd_kafka_toppar_consumer_lag_req(rd_kafka_toppar_t *rktp) { + rd_kafka_topic_partition_list_t *partitions; + rd_kafka_topic_partition_t *rktpar; + + if (rktp->rktp_wait_consumer_lag_resp) + return; /* Previous request not finished yet */ + + rd_kafka_toppar_lock(rktp); + + /* Offset requests can only be sent to the leader replica. + * + * Note: If rktp is delegated to a preferred replica, it is + * certain that FETCH >= v5 and so rktp_lo_offset will be + * updated via LogStartOffset in the FETCH response. + */ + if (!rktp->rktp_leader || (rktp->rktp_leader != rktp->rktp_broker)) { + rd_kafka_toppar_unlock(rktp); + return; + } + + /* Also don't send a timed log start offset request if leader + * broker supports FETCH >= v5, since this will be set when + * doing fetch requests. + */ + if (rd_kafka_broker_ApiVersion_supported( + rktp->rktp_broker, RD_KAFKAP_Fetch, 0, 5, NULL) == 5) { + rd_kafka_toppar_unlock(rktp); + return; + } + + rktp->rktp_wait_consumer_lag_resp = 1; + + partitions = rd_kafka_topic_partition_list_new(1); + rktpar = rd_kafka_topic_partition_list_add( + partitions, rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition); + rktpar->offset = RD_KAFKA_OFFSET_BEGINNING; + rd_kafka_topic_partition_set_current_leader_epoch( + rktpar, rktp->rktp_leader_epoch); + + /* Ask for oldest offset. The newest offset is automatically + * propagated in FetchResponse.HighwaterMark. */ + rd_kafka_ListOffsetsRequest( + rktp->rktp_broker, partitions, RD_KAFKA_REPLYQ(rktp->rktp_ops, 0), + rd_kafka_toppar_lag_handle_Offset, rd_kafka_toppar_keep(rktp)); + + rd_kafka_toppar_unlock(rktp); + + rd_kafka_topic_partition_list_destroy(partitions); +} + + + +/** + * Request earliest offset for a partition + * + * Locality: toppar handler thread + */ +static void rd_kafka_toppar_consumer_lag_tmr_cb(rd_kafka_timers_t *rkts, + void *arg) { + rd_kafka_toppar_t *rktp = arg; + rd_kafka_toppar_consumer_lag_req(rktp); +} + +/** + * @brief Update rktp_op_version. + * Enqueue an RD_KAFKA_OP_BARRIER type of operation + * when the op_version is updated. + * + * @locks_required rd_kafka_toppar_lock() must be held. + * @locality Toppar handler thread + */ +void rd_kafka_toppar_op_version_bump(rd_kafka_toppar_t *rktp, int32_t version) { + rd_kafka_op_t *rko; + + rktp->rktp_op_version = version; + rko = rd_kafka_op_new(RD_KAFKA_OP_BARRIER); + rko->rko_version = version; + rko->rko_prio = RD_KAFKA_PRIO_FLASH; + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + rd_kafka_q_enq(rktp->rktp_fetchq, rko); +} + + +/** + * Add new partition to topic. + * + * Locks: rd_kafka_topic_wrlock() must be held. + * Locks: rd_kafka_wrlock() must be held. + */ +rd_kafka_toppar_t *rd_kafka_toppar_new0(rd_kafka_topic_t *rkt, + int32_t partition, + const char *func, + int line) { + rd_kafka_toppar_t *rktp; + + rktp = rd_calloc(1, sizeof(*rktp)); + + rktp->rktp_partition = partition; + rktp->rktp_rkt = rkt; + rktp->rktp_leader_id = -1; + rktp->rktp_broker_id = -1; + rktp->rktp_leader_epoch = -1; + rd_interval_init(&rktp->rktp_lease_intvl); + rd_interval_init(&rktp->rktp_new_lease_intvl); + rd_interval_init(&rktp->rktp_new_lease_log_intvl); + rd_interval_init(&rktp->rktp_metadata_intvl); + /* Mark partition as unknown (does not exist) until we see the + * partition in topic metadata. */ + if (partition != RD_KAFKA_PARTITION_UA) + rktp->rktp_flags |= RD_KAFKA_TOPPAR_F_UNKNOWN; + rktp->rktp_fetch_state = RD_KAFKA_TOPPAR_FETCH_NONE; + rktp->rktp_fetch_msg_max_bytes = + rkt->rkt_rk->rk_conf.fetch_msg_max_bytes; + rktp->rktp_offset_fp = NULL; + rd_kafka_offset_stats_reset(&rktp->rktp_offsets); + rd_kafka_offset_stats_reset(&rktp->rktp_offsets_fin); + rktp->rktp_ls_offset = RD_KAFKA_OFFSET_INVALID; + rktp->rktp_hi_offset = RD_KAFKA_OFFSET_INVALID; + rktp->rktp_lo_offset = RD_KAFKA_OFFSET_INVALID; + rd_kafka_fetch_pos_init(&rktp->rktp_query_pos); + rd_kafka_fetch_pos_init(&rktp->rktp_next_fetch_start); + rd_kafka_fetch_pos_init(&rktp->rktp_last_next_fetch_start); + rd_kafka_fetch_pos_init(&rktp->rktp_app_pos); + rd_kafka_fetch_pos_init(&rktp->rktp_stored_pos); + rd_kafka_fetch_pos_init(&rktp->rktp_committing_pos); + rd_kafka_fetch_pos_init(&rktp->rktp_committed_pos); + rd_kafka_msgq_init(&rktp->rktp_msgq); + rd_kafka_msgq_init(&rktp->rktp_xmit_msgq); + mtx_init(&rktp->rktp_lock, mtx_plain); + + rd_refcnt_init(&rktp->rktp_refcnt, 0); + rktp->rktp_fetchq = rd_kafka_q_new(rkt->rkt_rk); + rktp->rktp_ops = rd_kafka_q_new(rkt->rkt_rk); + rktp->rktp_ops->rkq_serve = rd_kafka_toppar_op_serve; + rktp->rktp_ops->rkq_opaque = rktp; + rd_atomic32_init(&rktp->rktp_version, 1); + rktp->rktp_op_version = rd_atomic32_get(&rktp->rktp_version); + + rd_atomic32_init(&rktp->rktp_msgs_inflight, 0); + rd_kafka_pid_reset(&rktp->rktp_eos.pid); + + /* Consumer: If statistics is available we query the log start offset + * of each partition. + * Since the oldest offset only moves on log retention, we cap this + * value on the low end to a reasonable value to avoid flooding + * the brokers with OffsetRequests when our statistics interval is low. + * FIXME: Use a global timer to collect offsets for all partitions + * FIXME: This timer is superfulous for FETCH >= v5 because the log + * start offset is included in fetch responses. + * */ + if (rktp->rktp_rkt->rkt_rk->rk_conf.stats_interval_ms > 0 && + rkt->rkt_rk->rk_type == RD_KAFKA_CONSUMER && + rktp->rktp_partition != RD_KAFKA_PARTITION_UA) { + int intvl = rkt->rkt_rk->rk_conf.stats_interval_ms; + if (intvl < 10 * 1000 /* 10s */) + intvl = 10 * 1000; + rd_kafka_timer_start( + &rkt->rkt_rk->rk_timers, &rktp->rktp_consumer_lag_tmr, + intvl * 1000ll, rd_kafka_toppar_consumer_lag_tmr_cb, rktp); + } + + rktp->rktp_rkt = rd_kafka_topic_keep(rkt); + + rd_kafka_q_fwd_set(rktp->rktp_ops, rkt->rkt_rk->rk_ops); + rd_kafka_dbg(rkt->rkt_rk, TOPIC, "TOPPARNEW", + "NEW %s [%" PRId32 "] %p refcnt %p (at %s:%d)", + rkt->rkt_topic->str, rktp->rktp_partition, rktp, + &rktp->rktp_refcnt, func, line); + + return rd_kafka_toppar_keep(rktp); +} + + + +/** + * Removes a toppar from its duties, global lists, etc. + * + * Locks: rd_kafka_toppar_lock() MUST be held + */ +static void rd_kafka_toppar_remove(rd_kafka_toppar_t *rktp) { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "TOPPARREMOVE", + "Removing toppar %s [%" PRId32 "] %p", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, + rktp); + + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_validate_tmr, 1 /*lock*/); + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1 /*lock*/); + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_consumer_lag_tmr, 1 /*lock*/); + + rd_kafka_q_fwd_set(rktp->rktp_ops, NULL); +} + + +/** + * Final destructor for partition. + */ +void rd_kafka_toppar_destroy_final(rd_kafka_toppar_t *rktp) { + + rd_kafka_toppar_remove(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "DESTROY", + "%s [%" PRId32 "]: %p DESTROY_FINAL", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, + rktp); + + /* Clear queues */ + rd_kafka_assert(rktp->rktp_rkt->rkt_rk, + rd_kafka_msgq_len(&rktp->rktp_xmit_msgq) == 0); + rd_kafka_dr_msgq(rktp->rktp_rkt, &rktp->rktp_msgq, + RD_KAFKA_RESP_ERR__DESTROY); + rd_kafka_q_destroy_owner(rktp->rktp_fetchq); + rd_kafka_q_destroy_owner(rktp->rktp_ops); + + rd_kafka_replyq_destroy(&rktp->rktp_replyq); + + rd_kafka_topic_destroy0(rktp->rktp_rkt); + + mtx_destroy(&rktp->rktp_lock); + + if (rktp->rktp_leader) + rd_kafka_broker_destroy(rktp->rktp_leader); + + rd_refcnt_destroy(&rktp->rktp_refcnt); + + rd_free(rktp); +} + + +/** + * Set toppar fetching state. + * + * @locality any + * @locks_required rd_kafka_toppar_lock() MUST be held. + */ +void rd_kafka_toppar_set_fetch_state(rd_kafka_toppar_t *rktp, int fetch_state) { + rd_kafka_assert(NULL, + thrd_is_current(rktp->rktp_rkt->rkt_rk->rk_thread)); + + if ((int)rktp->rktp_fetch_state == fetch_state) + return; + + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC, "PARTSTATE", + "Partition %.*s [%" PRId32 "] changed fetch state %s -> %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), rktp->rktp_partition, + rd_kafka_fetch_states[rktp->rktp_fetch_state], + rd_kafka_fetch_states[fetch_state]); + + rktp->rktp_fetch_state = fetch_state; + + if (fetch_state == RD_KAFKA_TOPPAR_FETCH_ACTIVE) + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, CONSUMER | RD_KAFKA_DBG_TOPIC, + "FETCH", + "Partition %.*s [%" PRId32 "] start fetching at %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_fetch_pos2str(rktp->rktp_next_fetch_start)); +} + + +/** + * Returns the appropriate toppar for a given rkt and partition. + * The returned toppar has increased refcnt and must be unreffed by calling + * rd_kafka_toppar_destroy(). + * May return NULL. + * + * If 'ua_on_miss' is true the UA (unassigned) toppar is returned if + * 'partition' was not known locally, else NULL is returned. + * + * Locks: Caller must hold rd_kafka_topic_*lock() + */ +rd_kafka_toppar_t *rd_kafka_toppar_get0(const char *func, + int line, + const rd_kafka_topic_t *rkt, + int32_t partition, + int ua_on_miss) { + rd_kafka_toppar_t *rktp; + + if (partition >= 0 && partition < rkt->rkt_partition_cnt) + rktp = rkt->rkt_p[partition]; + else if (partition == RD_KAFKA_PARTITION_UA || ua_on_miss) + rktp = rkt->rkt_ua; + else + return NULL; + + if (rktp) + return rd_kafka_toppar_keep_fl(func, line, rktp); + + return NULL; +} + + +/** + * Same as rd_kafka_toppar_get() but no need for locking and + * looks up the topic first. + * + * Locality: any + * Locks: none + */ +rd_kafka_toppar_t *rd_kafka_toppar_get2(rd_kafka_t *rk, + const char *topic, + int32_t partition, + int ua_on_miss, + int create_on_miss) { + rd_kafka_topic_t *rkt; + rd_kafka_toppar_t *rktp; + + rd_kafka_wrlock(rk); + + /* Find or create topic */ + if (unlikely(!(rkt = rd_kafka_topic_find(rk, topic, 0 /*no-lock*/)))) { + if (!create_on_miss) { + rd_kafka_wrunlock(rk); + return NULL; + } + rkt = rd_kafka_topic_new0(rk, topic, NULL, NULL, 0 /*no-lock*/); + if (!rkt) { + rd_kafka_wrunlock(rk); + rd_kafka_log(rk, LOG_ERR, "TOPIC", + "Failed to create local topic \"%s\": %s", + topic, rd_strerror(errno)); + return NULL; + } + } + + rd_kafka_wrunlock(rk); + + rd_kafka_topic_wrlock(rkt); + rktp = rd_kafka_toppar_desired_add(rkt, partition); + rd_kafka_topic_wrunlock(rkt); + + rd_kafka_topic_destroy0(rkt); + + return rktp; +} + + +/** + * Returns a toppar if it is available in the cluster. + * '*errp' is set to the error-code if lookup fails. + * + * Locks: topic_*lock() MUST be held + */ +rd_kafka_toppar_t *rd_kafka_toppar_get_avail(const rd_kafka_topic_t *rkt, + int32_t partition, + int ua_on_miss, + rd_kafka_resp_err_t *errp) { + rd_kafka_toppar_t *rktp; + + switch (rkt->rkt_state) { + case RD_KAFKA_TOPIC_S_UNKNOWN: + /* No metadata received from cluster yet. + * Put message in UA partition and re-run partitioner when + * cluster comes up. */ + partition = RD_KAFKA_PARTITION_UA; + break; + + case RD_KAFKA_TOPIC_S_NOTEXISTS: + /* Topic not found in cluster. + * Fail message immediately. */ + *errp = RD_KAFKA_RESP_ERR__UNKNOWN_TOPIC; + return NULL; + + case RD_KAFKA_TOPIC_S_ERROR: + /* Permanent topic error. */ + *errp = rkt->rkt_err; + return NULL; + + case RD_KAFKA_TOPIC_S_EXISTS: + /* Topic exists in cluster. */ + + /* Topic exists but has no partitions. + * This is usually an transient state following the + * auto-creation of a topic. */ + if (unlikely(rkt->rkt_partition_cnt == 0)) { + partition = RD_KAFKA_PARTITION_UA; + break; + } + + /* Check that partition exists. */ + if (partition >= rkt->rkt_partition_cnt) { + *errp = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + return NULL; + } + break; + + default: + rd_kafka_assert(rkt->rkt_rk, !*"NOTREACHED"); + break; + } + + /* Get new partition */ + rktp = rd_kafka_toppar_get(rkt, partition, 0); + + if (unlikely(!rktp)) { + /* Unknown topic or partition */ + if (rkt->rkt_state == RD_KAFKA_TOPIC_S_NOTEXISTS) + *errp = RD_KAFKA_RESP_ERR__UNKNOWN_TOPIC; + else + *errp = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + + return NULL; + } + + return rktp; +} + + +/** + * Looks for partition 'i' in topic 'rkt's desired list. + * + * The desired partition list is the list of partitions that are desired + * (e.g., by the consumer) but not yet seen on a broker. + * As soon as the partition is seen on a broker the toppar is moved from + * the desired list and onto the normal rkt_p array. + * When the partition on the broker goes away a desired partition is put + * back on the desired list. + * + * Locks: rd_kafka_topic_*lock() must be held. + * Note: 'rktp' refcount is increased. + */ + +rd_kafka_toppar_t *rd_kafka_toppar_desired_get(rd_kafka_topic_t *rkt, + int32_t partition) { + rd_kafka_toppar_t *rktp; + int i; + + RD_LIST_FOREACH(rktp, &rkt->rkt_desp, i) { + if (rktp->rktp_partition == partition) + return rd_kafka_toppar_keep(rktp); + } + + return NULL; +} + + +/** + * Link toppar on desired list. + * + * Locks: rd_kafka_topic_wrlock() and toppar_lock() must be held. + */ +void rd_kafka_toppar_desired_link(rd_kafka_toppar_t *rktp) { + + if (rktp->rktp_flags & RD_KAFKA_TOPPAR_F_ON_DESP) + return; /* Already linked */ + + rd_kafka_toppar_keep(rktp); + rd_list_add(&rktp->rktp_rkt->rkt_desp, rktp); + rd_interval_reset(&rktp->rktp_rkt->rkt_desp_refresh_intvl); + rktp->rktp_flags |= RD_KAFKA_TOPPAR_F_ON_DESP; +} + +/** + * Unlink toppar from desired list. + * + * Locks: rd_kafka_topic_wrlock() and toppar_lock() must be held. + */ +void rd_kafka_toppar_desired_unlink(rd_kafka_toppar_t *rktp) { + if (!(rktp->rktp_flags & RD_KAFKA_TOPPAR_F_ON_DESP)) + return; /* Not linked */ + + rktp->rktp_flags &= ~RD_KAFKA_TOPPAR_F_ON_DESP; + rd_list_remove(&rktp->rktp_rkt->rkt_desp, rktp); + rd_interval_reset(&rktp->rktp_rkt->rkt_desp_refresh_intvl); + rd_kafka_toppar_destroy(rktp); +} + + +/** + * @brief If rktp is not already desired: + * - mark as DESIRED|~REMOVE + * - add to desired list if unknown + * + * @remark toppar_lock() MUST be held + */ +void rd_kafka_toppar_desired_add0(rd_kafka_toppar_t *rktp) { + if ((rktp->rktp_flags & RD_KAFKA_TOPPAR_F_DESIRED)) + return; + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "DESIRED", + "%s [%" PRId32 "]: marking as DESIRED", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition); + + /* If toppar was marked for removal this is no longer + * the case since the partition is now desired. */ + rktp->rktp_flags &= ~RD_KAFKA_TOPPAR_F_REMOVE; + + rktp->rktp_flags |= RD_KAFKA_TOPPAR_F_DESIRED; + + if (rktp->rktp_flags & RD_KAFKA_TOPPAR_F_UNKNOWN) { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "DESIRED", + "%s [%" PRId32 "]: adding to DESIRED list", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition); + rd_kafka_toppar_desired_link(rktp); + } +} + + +/** + * Adds 'partition' as a desired partition to topic 'rkt', or updates + * an existing partition to be desired. + * + * Locks: rd_kafka_topic_wrlock() must be held. + */ +rd_kafka_toppar_t *rd_kafka_toppar_desired_add(rd_kafka_topic_t *rkt, + int32_t partition) { + rd_kafka_toppar_t *rktp; + + rktp = rd_kafka_toppar_get(rkt, partition, 0 /*no_ua_on_miss*/); + + if (!rktp) + rktp = rd_kafka_toppar_desired_get(rkt, partition); + + if (!rktp) + rktp = rd_kafka_toppar_new(rkt, partition); + + rd_kafka_toppar_lock(rktp); + rd_kafka_toppar_desired_add0(rktp); + rd_kafka_toppar_unlock(rktp); + + return rktp; /* Callers refcount */ +} + + + +/** + * Unmarks an 'rktp' as desired. + * + * Locks: rd_kafka_topic_wrlock() and rd_kafka_toppar_lock() MUST be held. + */ +void rd_kafka_toppar_desired_del(rd_kafka_toppar_t *rktp) { + + if (!(rktp->rktp_flags & RD_KAFKA_TOPPAR_F_DESIRED)) + return; + + rktp->rktp_flags &= ~RD_KAFKA_TOPPAR_F_DESIRED; + rd_kafka_toppar_desired_unlink(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "DESP", + "Removing (un)desired topic %s [%" PRId32 "]", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition); + + if (rktp->rktp_flags & RD_KAFKA_TOPPAR_F_UNKNOWN) { + /* If this partition does not exist in the cluster + * and is no longer desired, remove it. */ + rd_kafka_toppar_broker_leave_for_remove(rktp); + } +} + + + +/** + * Append message at tail of 'rktp' message queue. + */ +void rd_kafka_toppar_enq_msg(rd_kafka_toppar_t *rktp, + rd_kafka_msg_t *rkm, + rd_ts_t now) { + rd_kafka_q_t *wakeup_q = NULL; + + rd_kafka_toppar_lock(rktp); + + if (!rkm->rkm_u.producer.msgid && + rktp->rktp_partition != RD_KAFKA_PARTITION_UA) + rkm->rkm_u.producer.msgid = ++rktp->rktp_msgid; + + if (rktp->rktp_partition == RD_KAFKA_PARTITION_UA || + rktp->rktp_rkt->rkt_conf.queuing_strategy == RD_KAFKA_QUEUE_FIFO) { + /* No need for enq_sorted(), this is the oldest message. */ + rd_kafka_msgq_enq(&rktp->rktp_msgq, rkm); + } else { + rd_kafka_msgq_enq_sorted(rktp->rktp_rkt, &rktp->rktp_msgq, rkm); + } + + if (unlikely(rktp->rktp_partition != RD_KAFKA_PARTITION_UA && + rd_kafka_msgq_may_wakeup(&rktp->rktp_msgq, now) && + (wakeup_q = rktp->rktp_msgq_wakeup_q))) { + /* Wake-up broker thread */ + rktp->rktp_msgq.rkmq_wakeup.signalled = rd_true; + rd_kafka_q_keep(wakeup_q); + } + + rd_kafka_toppar_unlock(rktp); + + if (unlikely(wakeup_q != NULL)) { + rd_kafka_q_yield(wakeup_q); + rd_kafka_q_destroy(wakeup_q); + } +} + + +/** + * @brief Insert \p srcq before \p insert_before in \p destq. + * + * If \p srcq and \p destq overlaps only part of the \p srcq will be inserted. + * + * Upon return \p srcq will contain any remaining messages that require + * another insert position in \p destq. + */ +static void rd_kafka_msgq_insert_msgq_before(rd_kafka_msgq_t *destq, + rd_kafka_msg_t *insert_before, + rd_kafka_msgq_t *srcq, + int (*cmp)(const void *a, + const void *b)) { + rd_kafka_msg_t *slast; + rd_kafka_msgq_t tmpq; + + if (!insert_before) { + /* Append all of srcq to destq */ + rd_kafka_msgq_concat(destq, srcq); + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + return; + } + + slast = rd_kafka_msgq_last(srcq); + rd_dassert(slast); + + if (cmp(slast, insert_before) > 0) { + rd_kafka_msg_t *new_sfirst; + int cnt; + int64_t bytes; + + /* destq insert_before resides somewhere between + * srcq.first and srcq.last, find the first message in + * srcq that is > insert_before and split srcq into + * a left part that contains the messages to insert before + * insert_before, and a right part that will need another + * insert position. */ + + new_sfirst = rd_kafka_msgq_find_pos(srcq, NULL, insert_before, + cmp, &cnt, &bytes); + rd_assert(new_sfirst); + + /* split srcq into two parts using the divider message */ + rd_kafka_msgq_split(srcq, &tmpq, new_sfirst, cnt, bytes); + + rd_kafka_msgq_verify_order(NULL, srcq, 0, rd_false); + rd_kafka_msgq_verify_order(NULL, &tmpq, 0, rd_false); + } else { + rd_kafka_msgq_init(&tmpq); + } + + /* srcq now contains messages up to the first message in destq, + * insert srcq at insert_before in destq. */ + rd_dassert(!TAILQ_EMPTY(&destq->rkmq_msgs)); + rd_dassert(!TAILQ_EMPTY(&srcq->rkmq_msgs)); + TAILQ_INSERT_LIST_BEFORE(&destq->rkmq_msgs, insert_before, + &srcq->rkmq_msgs, rd_kafka_msgs_head_s, + rd_kafka_msg_t *, rkm_link); + destq->rkmq_msg_cnt += srcq->rkmq_msg_cnt; + destq->rkmq_msg_bytes += srcq->rkmq_msg_bytes; + srcq->rkmq_msg_cnt = 0; + srcq->rkmq_msg_bytes = 0; + + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + rd_kafka_msgq_verify_order(NULL, srcq, 0, rd_false); + + /* tmpq contains the remaining messages in srcq, move it over. */ + rd_kafka_msgq_move(srcq, &tmpq); + + rd_kafka_msgq_verify_order(NULL, srcq, 0, rd_false); +} + + +/** + * @brief Insert all messages from \p srcq into \p destq in their sorted + * position (using \p cmp) + */ +void rd_kafka_msgq_insert_msgq(rd_kafka_msgq_t *destq, + rd_kafka_msgq_t *srcq, + int (*cmp)(const void *a, const void *b)) { + rd_kafka_msg_t *sfirst, *dlast, *start_pos = NULL; + + if (unlikely(RD_KAFKA_MSGQ_EMPTY(srcq))) { + /* srcq is empty */ + return; + } + + if (unlikely(RD_KAFKA_MSGQ_EMPTY(destq))) { + /* destq is empty, simply move the srcq. */ + rd_kafka_msgq_move(destq, srcq); + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + return; + } + + /* Optimize insertion by bulk-moving messages in place. + * We know that: + * - destq is sorted but might not be continous (1,2,3,7) + * - srcq is sorted but might not be continous (4,5,6,8) + * - there migt be (multiple) overlaps between the two, e.g: + * destq = (1,2,3,7), srcq = (4,5,6,8) + * - there may be millions of messages. + */ + + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + rd_kafka_msgq_verify_order(NULL, srcq, 0, rd_false); + + dlast = rd_kafka_msgq_last(destq); + sfirst = rd_kafka_msgq_first(srcq); + + /* Most common case, all of srcq goes after destq */ + if (likely(cmp(dlast, sfirst) < 0)) { + rd_kafka_msgq_concat(destq, srcq); + + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + + rd_assert(RD_KAFKA_MSGQ_EMPTY(srcq)); + return; + } + + /* Insert messages from srcq into destq in non-overlapping + * chunks until srcq is exhausted. */ + while (likely(sfirst != NULL)) { + rd_kafka_msg_t *insert_before; + + /* Get insert position in destq of first element in srcq */ + insert_before = rd_kafka_msgq_find_pos(destq, start_pos, sfirst, + cmp, NULL, NULL); + + /* Insert as much of srcq as possible at insert_before */ + rd_kafka_msgq_insert_msgq_before(destq, insert_before, srcq, + cmp); + + /* Remember the current destq position so the next find_pos() + * does not have to re-scan destq and what was + * added from srcq. */ + start_pos = insert_before; + + /* For next iteration */ + sfirst = rd_kafka_msgq_first(srcq); + + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + rd_kafka_msgq_verify_order(NULL, srcq, 0, rd_false); + } + + rd_kafka_msgq_verify_order(NULL, destq, 0, rd_false); + + rd_assert(RD_KAFKA_MSGQ_EMPTY(srcq)); +} + + +/** + * @brief Inserts messages from \p srcq according to their sorted position + * into \p destq, filtering out messages that can not be retried. + * + * @param incr_retry Increment retry count for messages. + * @param max_retries Maximum retries allowed per message. + * @param backoff Absolute retry backoff for retried messages. + * + * @returns 0 if all messages were retried, or 1 if some messages + * could not be retried. + */ +int rd_kafka_retry_msgq(rd_kafka_msgq_t *destq, + rd_kafka_msgq_t *srcq, + int incr_retry, + int max_retries, + rd_ts_t backoff, + rd_kafka_msg_status_t status, + int (*cmp)(const void *a, const void *b)) { + rd_kafka_msgq_t retryable = RD_KAFKA_MSGQ_INITIALIZER(retryable); + rd_kafka_msg_t *rkm, *tmp; + + /* Scan through messages to see which ones are eligible for retry, + * move the retryable ones to temporary queue and + * set backoff time for first message and optionally + * increase retry count for each message. + * Sorted insert is not necessary since the original order + * srcq order is maintained. */ + TAILQ_FOREACH_SAFE(rkm, &srcq->rkmq_msgs, rkm_link, tmp) { + if (rkm->rkm_u.producer.retries + incr_retry > max_retries) + continue; + + rd_kafka_msgq_deq(srcq, rkm, 1); + rd_kafka_msgq_enq(&retryable, rkm); + + rkm->rkm_u.producer.ts_backoff = backoff; + rkm->rkm_u.producer.retries += incr_retry; + + /* Don't downgrade a message from any form of PERSISTED + * to NOT_PERSISTED, since the original cause of indicating + * PERSISTED can't be changed. + * E.g., a previous ack or in-flight timeout. */ + if (likely(!(status == RD_KAFKA_MSG_STATUS_NOT_PERSISTED && + rkm->rkm_status != + RD_KAFKA_MSG_STATUS_NOT_PERSISTED))) + rkm->rkm_status = status; + } + + /* No messages are retryable */ + if (RD_KAFKA_MSGQ_EMPTY(&retryable)) + return 0; + + /* Insert retryable list at sorted position */ + rd_kafka_msgq_insert_msgq(destq, &retryable, cmp); + + return 1; +} + +/** + * @brief Inserts messages from \p rkmq according to their sorted position + * into the partition's message queue. + * + * @param incr_retry Increment retry count for messages. + * @param status Set status on each message. + * + * @returns 0 if all messages were retried, or 1 if some messages + * could not be retried. + * + * @locality Broker thread (but not necessarily the leader broker thread) + */ + +int rd_kafka_toppar_retry_msgq(rd_kafka_toppar_t *rktp, + rd_kafka_msgq_t *rkmq, + int incr_retry, + rd_kafka_msg_status_t status) { + rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk; + rd_ts_t backoff = rd_clock() + (rk->rk_conf.retry_backoff_ms * 1000); + int r; + + if (rd_kafka_terminating(rk)) + return 1; + + rd_kafka_toppar_lock(rktp); + r = rd_kafka_retry_msgq(&rktp->rktp_msgq, rkmq, incr_retry, + rk->rk_conf.max_retries, backoff, status, + rktp->rktp_rkt->rkt_conf.msg_order_cmp); + rd_kafka_toppar_unlock(rktp); + + return r; +} + +/** + * @brief Insert sorted message list \p rkmq at sorted position in \p rktp 's + * message queue. The queues must not overlap. + * @remark \p rkmq will be cleared. + */ +void rd_kafka_toppar_insert_msgq(rd_kafka_toppar_t *rktp, + rd_kafka_msgq_t *rkmq) { + rd_kafka_toppar_lock(rktp); + rd_kafka_msgq_insert_msgq(&rktp->rktp_msgq, rkmq, + rktp->rktp_rkt->rkt_conf.msg_order_cmp); + rd_kafka_toppar_unlock(rktp); +} + + + +/** + * Helper method for purging queues when removing a toppar. + * Locks: rd_kafka_toppar_lock() MUST be held + */ +void rd_kafka_toppar_purge_and_disable_queues(rd_kafka_toppar_t *rktp) { + rd_kafka_q_disable(rktp->rktp_fetchq); + rd_kafka_q_purge(rktp->rktp_fetchq); + rd_kafka_q_disable(rktp->rktp_ops); + rd_kafka_q_purge(rktp->rktp_ops); +} + + +/** + * @brief Migrate rktp from (optional) \p old_rkb to (optional) \p new_rkb, + * but at least one is required to be non-NULL. + * + * This is an async operation. + * + * @locks rd_kafka_toppar_lock() MUST be held + */ +static void rd_kafka_toppar_broker_migrate(rd_kafka_toppar_t *rktp, + rd_kafka_broker_t *old_rkb, + rd_kafka_broker_t *new_rkb) { + rd_kafka_op_t *rko; + rd_kafka_broker_t *dest_rkb; + int had_next_broker = rktp->rktp_next_broker ? 1 : 0; + + rd_assert(old_rkb || new_rkb); + + /* Update next broker */ + if (new_rkb) + rd_kafka_broker_keep(new_rkb); + if (rktp->rktp_next_broker) + rd_kafka_broker_destroy(rktp->rktp_next_broker); + rktp->rktp_next_broker = new_rkb; + + /* If next_broker is set it means there is already an async + * migration op going on and we should not send a new one + * but simply change the next_broker (which we did above). */ + if (had_next_broker) + return; + + /* Revert from offset-wait state back to offset-query + * prior to leaving the broker to avoid stalling + * on the new broker waiting for a offset reply from + * this old broker (that might not come and thus need + * to time out..slowly) */ + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_OFFSET_WAIT) + rd_kafka_toppar_offset_retry(rktp, 500, + "migrating to new broker"); + + if (old_rkb) { + /* If there is an existing broker for this toppar we let it + * first handle its own leave and then trigger the join for + * the next broker, if any. */ + rko = rd_kafka_op_new(RD_KAFKA_OP_PARTITION_LEAVE); + dest_rkb = old_rkb; + } else { + /* No existing broker, send join op directly to new broker. */ + rko = rd_kafka_op_new(RD_KAFKA_OP_PARTITION_JOIN); + dest_rkb = new_rkb; + } + + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC, "BRKMIGR", + "Migrating topic %.*s [%" PRId32 + "] %p from %s to %s " + "(sending %s to %s)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), rktp->rktp_partition, + rktp, old_rkb ? rd_kafka_broker_name(old_rkb) : "(none)", + new_rkb ? rd_kafka_broker_name(new_rkb) : "(none)", + rd_kafka_op2str(rko->rko_type), rd_kafka_broker_name(dest_rkb)); + + rd_kafka_q_enq(dest_rkb->rkb_ops, rko); +} + + +/** + * Async toppar leave from broker. + * Only use this when partitions are to be removed. + * + * Locks: rd_kafka_toppar_lock() MUST be held + */ +void rd_kafka_toppar_broker_leave_for_remove(rd_kafka_toppar_t *rktp) { + rd_kafka_op_t *rko; + rd_kafka_broker_t *dest_rkb; + + rktp->rktp_flags |= RD_KAFKA_TOPPAR_F_REMOVE; + + if (rktp->rktp_next_broker) + dest_rkb = rktp->rktp_next_broker; + else if (rktp->rktp_broker) + dest_rkb = rktp->rktp_broker; + else { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "TOPPARDEL", + "%.*s [%" PRId32 + "] %p not handled by any broker: " + "not sending LEAVE for remove", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rktp); + return; + } + + + /* Revert from offset-wait state back to offset-query + * prior to leaving the broker to avoid stalling + * on the new broker waiting for a offset reply from + * this old broker (that might not come and thus need + * to time out..slowly) */ + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_OFFSET_WAIT) + rd_kafka_toppar_set_fetch_state( + rktp, RD_KAFKA_TOPPAR_FETCH_OFFSET_QUERY); + + rko = rd_kafka_op_new(RD_KAFKA_OP_PARTITION_LEAVE); + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC, "BRKMIGR", + "%.*s [%" PRId32 "] %p sending final LEAVE for removal by %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), rktp->rktp_partition, + rktp, rd_kafka_broker_name(dest_rkb)); + + rd_kafka_q_enq(dest_rkb->rkb_ops, rko); +} + + +/** + * @brief Delegates toppar 'rktp' to broker 'rkb'. 'rkb' may be NULL to + * undelegate broker. + * + * @locks Caller must have rd_kafka_toppar_lock(rktp) held. + */ +void rd_kafka_toppar_broker_delegate(rd_kafka_toppar_t *rktp, + rd_kafka_broker_t *rkb) { + rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk; + int internal_fallback = 0; + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BRKDELGT", + "%s [%" PRId32 + "]: delegate to broker %s " + "(rktp %p, term %d, ref %d)", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, + rkb ? rkb->rkb_name : "(none)", rktp, + rd_kafka_terminating(rk), + rd_refcnt_get(&rktp->rktp_refcnt)); + + /* Undelegated toppars are delgated to the internal + * broker for bookkeeping. */ + if (!rkb && !rd_kafka_terminating(rk)) { + rkb = rd_kafka_broker_internal(rk); + internal_fallback = 1; + } + + if (rktp->rktp_broker == rkb && !rktp->rktp_next_broker) { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BRKDELGT", + "%.*s [%" PRId32 + "]: not updating broker: " + "already on correct broker %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rkb ? rd_kafka_broker_name(rkb) : "(none)"); + + if (internal_fallback) + rd_kafka_broker_destroy(rkb); + return; + } + + if (rktp->rktp_broker) + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BRKDELGT", + "%.*s [%" PRId32 + "]: no longer delegated to " + "broker %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_broker_name(rktp->rktp_broker)); + + + if (rkb) { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BRKDELGT", + "%.*s [%" PRId32 + "]: delegating to broker %s " + "for partition with %i messages " + "(%" PRIu64 " bytes) queued", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_broker_name(rkb), + rktp->rktp_msgq.rkmq_msg_cnt, + rktp->rktp_msgq.rkmq_msg_bytes); + + + } else { + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "BRKDELGT", + "%.*s [%" PRId32 "]: no broker delegated", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition); + } + + if (rktp->rktp_broker || rkb) + rd_kafka_toppar_broker_migrate(rktp, rktp->rktp_broker, rkb); + + if (internal_fallback) + rd_kafka_broker_destroy(rkb); +} + + + +void rd_kafka_toppar_offset_commit_result( + rd_kafka_toppar_t *rktp, + rd_kafka_resp_err_t err, + rd_kafka_topic_partition_list_t *offsets) { + if (err) + rd_kafka_consumer_err( + rktp->rktp_fetchq, + /* FIXME: propagate broker_id */ + RD_KAFKA_NODEID_UA, err, 0 /* FIXME:VERSION*/, NULL, rktp, + RD_KAFKA_OFFSET_INVALID, "Offset commit failed: %s", + rd_kafka_err2str(err)); + + rd_kafka_toppar_lock(rktp); + if (!err) + rktp->rktp_committed_pos = + rd_kafka_topic_partition_get_fetch_pos(&offsets->elems[0]); + + /* When stopping toppars: + * Final commit is now done (or failed), propagate. */ + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_STOPPING) + rd_kafka_toppar_fetch_stopped(rktp, err); + + rd_kafka_toppar_unlock(rktp); +} + + + +/** + * Handle the next offset to consume for a toppar. + * This is used during initial setup when trying to figure out what + * offset to start consuming from. + * + * Locality: toppar handler thread. + * Locks: toppar_lock(rktp) must be held + */ +void rd_kafka_toppar_next_offset_handle(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t next_pos) { + + if (RD_KAFKA_OFFSET_IS_LOGICAL(next_pos.offset)) { + /* Offset storage returned logical offset (e.g. "end"), + * look it up. */ + + /* Save next offset, even if logical, so that e.g., + * assign(BEGINNING) survives a pause+resume, etc. + * See issue #2105. */ + rd_kafka_toppar_set_next_fetch_position(rktp, next_pos); + + rd_kafka_offset_reset(rktp, RD_KAFKA_NODEID_UA, next_pos, + RD_KAFKA_RESP_ERR_NO_ERROR, "update"); + return; + } + + /* Adjust by TAIL count if, if wanted */ + if (rktp->rktp_query_pos.offset <= RD_KAFKA_OFFSET_TAIL_BASE) { + int64_t orig_offset = next_pos.offset; + int64_t tail_cnt = llabs(rktp->rktp_query_pos.offset - + RD_KAFKA_OFFSET_TAIL_BASE); + + if (tail_cnt > next_pos.offset) + next_pos.offset = 0; + else + next_pos.offset -= tail_cnt; + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "OFFSET", + "OffsetReply for topic %s [%" PRId32 + "]: " + "offset %" PRId64 + ": adjusting for " + "OFFSET_TAIL(%" PRId64 "): effective %s", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, orig_offset, tail_cnt, + rd_kafka_fetch_pos2str(next_pos)); + } + + rd_kafka_toppar_set_next_fetch_position(rktp, next_pos); + + rd_kafka_toppar_set_fetch_state(rktp, RD_KAFKA_TOPPAR_FETCH_ACTIVE); + + /* Wake-up broker thread which might be idling on IO */ + if (rktp->rktp_broker) + rd_kafka_broker_wakeup(rktp->rktp_broker, "ready to fetch"); +} + + + +/** + * Fetch committed offset for a single partition. (simple consumer) + * + * Locality: toppar thread + */ +void rd_kafka_toppar_offset_fetch(rd_kafka_toppar_t *rktp, + rd_kafka_replyq_t replyq) { + rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk; + rd_kafka_topic_partition_list_t *part; + rd_kafka_op_t *rko; + + rd_kafka_dbg(rk, TOPIC, "OFFSETREQ", + "Partition %.*s [%" PRId32 + "]: querying cgrp for " + "committed offset (opv %d)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, replyq.version); + + part = rd_kafka_topic_partition_list_new(1); + rd_kafka_topic_partition_list_add0(__FUNCTION__, __LINE__, part, + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, rktp, NULL); + + rko = rd_kafka_op_new(RD_KAFKA_OP_OFFSET_FETCH); + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + rko->rko_replyq = replyq; + + rko->rko_u.offset_fetch.partitions = part; + rko->rko_u.offset_fetch.require_stable_offsets = + rk->rk_conf.isolation_level == RD_KAFKA_READ_COMMITTED; + rko->rko_u.offset_fetch.do_free = 1; + + rd_kafka_q_enq(rktp->rktp_cgrp->rkcg_ops, rko); +} + + + +/** + * Toppar based OffsetResponse handling. + * This is used for finding the next offset to Fetch. + * + * Locality: toppar handler thread + */ +static void rd_kafka_toppar_handle_Offset(rd_kafka_t *rk, + rd_kafka_broker_t *rkb, + rd_kafka_resp_err_t err, + rd_kafka_buf_t *rkbuf, + rd_kafka_buf_t *request, + void *opaque) { + rd_kafka_toppar_t *rktp = opaque; + rd_kafka_topic_partition_list_t *offsets; + rd_kafka_topic_partition_t *rktpar; + int actions = 0; + + rd_kafka_toppar_lock(rktp); + /* Drop reply from previous partition leader */ + if (err != RD_KAFKA_RESP_ERR__DESTROY && rktp->rktp_broker != rkb) + err = RD_KAFKA_RESP_ERR__OUTDATED; + rd_kafka_toppar_unlock(rktp); + + offsets = rd_kafka_topic_partition_list_new(1); + + rd_rkb_dbg(rkb, TOPIC, "OFFSET", + "Offset reply for " + "topic %.*s [%" PRId32 "] (v%d vs v%d)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, request->rkbuf_replyq.version, + rktp->rktp_op_version); + + rd_dassert(request->rkbuf_replyq.version > 0); + if (err != RD_KAFKA_RESP_ERR__DESTROY && + rd_kafka_buf_version_outdated(request, rktp->rktp_op_version)) { + /* Outdated request response, ignore. */ + err = RD_KAFKA_RESP_ERR__OUTDATED; + } + + /* Parse and return Offset */ + if (err != RD_KAFKA_RESP_ERR__OUTDATED) + err = rd_kafka_handle_ListOffsets(rk, rkb, err, rkbuf, request, + offsets, &actions); + + if (!err && !(rktpar = rd_kafka_topic_partition_list_find( + offsets, rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition))) { + /* Requested partition not found in response */ + err = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + actions |= RD_KAFKA_ERR_ACTION_PERMANENT; + } + + if (err) { + rd_rkb_dbg(rkb, TOPIC, "OFFSET", + "Offset reply error for " + "topic %.*s [%" PRId32 "] (v%d, %s): %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, request->rkbuf_replyq.version, + rd_kafka_err2str(err), + rd_kafka_actions2str(actions)); + + rd_kafka_topic_partition_list_destroy(offsets); + + if (err == RD_KAFKA_RESP_ERR__DESTROY || + err == RD_KAFKA_RESP_ERR__OUTDATED) { + /* Termination or outdated, quick cleanup. */ + + if (err == RD_KAFKA_RESP_ERR__OUTDATED) { + rd_kafka_toppar_lock(rktp); + rd_kafka_toppar_offset_retry( + rktp, 500, "outdated offset response"); + rd_kafka_toppar_unlock(rktp); + } + + /* from request.opaque */ + rd_kafka_toppar_destroy(rktp); + return; + + } else if (err == RD_KAFKA_RESP_ERR__IN_PROGRESS) + return; /* Retry in progress */ + + + rd_kafka_toppar_lock(rktp); + + if (!(actions & (RD_KAFKA_ERR_ACTION_RETRY | + RD_KAFKA_ERR_ACTION_REFRESH))) { + /* Permanent error. Trigger auto.offset.reset policy + * and signal error back to application. */ + + rd_kafka_offset_reset(rktp, rkb->rkb_nodeid, + rktp->rktp_query_pos, err, + "failed to query logical offset"); + + rd_kafka_consumer_err( + rktp->rktp_fetchq, rkb->rkb_nodeid, err, 0, NULL, + rktp, + (rktp->rktp_query_pos.offset <= + RD_KAFKA_OFFSET_TAIL_BASE + ? rktp->rktp_query_pos.offset - + RD_KAFKA_OFFSET_TAIL_BASE + : rktp->rktp_query_pos.offset), + "Failed to query logical offset %s: %s", + rd_kafka_offset2str(rktp->rktp_query_pos.offset), + rd_kafka_err2str(err)); + + } else { + /* Temporary error. Schedule retry. */ + char tmp[256]; + + rd_snprintf( + tmp, sizeof(tmp), + "failed to query logical offset %s: %s", + rd_kafka_offset2str(rktp->rktp_query_pos.offset), + rd_kafka_err2str(err)); + + rd_kafka_toppar_offset_retry(rktp, 500, tmp); + } + + rd_kafka_toppar_unlock(rktp); + + rd_kafka_toppar_destroy(rktp); /* from request.opaque */ + return; + } + + + rd_kafka_toppar_lock(rktp); + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "OFFSET", + "Offset %s request for %.*s [%" PRId32 + "] " + "returned offset %s (%" PRId64 ") leader epoch %" PRId32, + rd_kafka_offset2str(rktp->rktp_query_pos.offset), + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_offset2str(rktpar->offset), + rktpar->offset, + rd_kafka_topic_partition_get_leader_epoch(rktpar)); + + + rd_kafka_toppar_next_offset_handle( + rktp, RD_KAFKA_FETCH_POS( + rktpar->offset, + rd_kafka_topic_partition_get_leader_epoch(rktpar))); + rd_kafka_toppar_unlock(rktp); + + rd_kafka_topic_partition_list_destroy(offsets); + + rd_kafka_toppar_destroy(rktp); /* from request.opaque */ +} + + +/** + * @brief An Offset fetch failed (for whatever reason) in + * the RD_KAFKA_TOPPAR_FETCH_OFFSET_WAIT state: + * set the state back to FETCH_OFFSET_QUERY and start the + * offset_query_tmr to trigger a new request eventually. + * + * @locality toppar handler thread + * @locks toppar_lock() MUST be held + */ +static void rd_kafka_toppar_offset_retry(rd_kafka_toppar_t *rktp, + int backoff_ms, + const char *reason) { + rd_ts_t tmr_next; + int restart_tmr; + + /* (Re)start timer if not started or the current timeout + * is larger than \p backoff_ms. */ + tmr_next = rd_kafka_timer_next(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1); + + restart_tmr = + (tmr_next == -1 || tmr_next > rd_clock() + (backoff_ms * 1000ll)); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "OFFSET", + "%s [%" PRId32 "]: %s: %s for %s", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, + reason, + restart_tmr ? "(re)starting offset query timer" + : "offset query timer already scheduled", + rd_kafka_fetch_pos2str(rktp->rktp_query_pos)); + + rd_kafka_toppar_set_fetch_state(rktp, + RD_KAFKA_TOPPAR_FETCH_OFFSET_QUERY); + + if (restart_tmr) + rd_kafka_timer_start(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, + backoff_ms * 1000ll, + rd_kafka_offset_query_tmr_cb, rktp); +} + + + +/** + * Send OffsetRequest for toppar. + * + * If \p backoff_ms is non-zero only the query timer is started, + * otherwise a query is triggered directly. + * + * Locality: toppar handler thread + * Locks: toppar_lock() must be held + */ +void rd_kafka_toppar_offset_request(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t query_pos, + int backoff_ms) { + rd_kafka_broker_t *rkb; + + rd_kafka_assert(NULL, + thrd_is_current(rktp->rktp_rkt->rkt_rk->rk_thread)); + + rkb = rktp->rktp_broker; + + if (!backoff_ms && (!rkb || rkb->rkb_source == RD_KAFKA_INTERNAL)) + backoff_ms = 500; + + if (backoff_ms) { + rd_kafka_toppar_offset_retry( + rktp, backoff_ms, + !rkb ? "no current leader for partition" : "backoff"); + return; + } + + + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1 /*lock*/); + + + if (query_pos.offset == RD_KAFKA_OFFSET_STORED && + rktp->rktp_rkt->rkt_conf.offset_store_method == + RD_KAFKA_OFFSET_METHOD_BROKER) { + /* + * Get stored offset from broker based storage: + * ask cgrp manager for offsets + */ + rd_kafka_toppar_offset_fetch( + rktp, + RD_KAFKA_REPLYQ(rktp->rktp_ops, rktp->rktp_op_version)); + + } else { + rd_kafka_topic_partition_list_t *offsets; + rd_kafka_topic_partition_t *rktpar; + + /* + * Look up logical offset (end,beginning,tail,..) + */ + + rd_rkb_dbg(rkb, TOPIC, "OFFREQ", + "Partition %.*s [%" PRId32 + "]: querying for logical " + "offset %s (opv %d)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_offset2str(query_pos.offset), + rktp->rktp_op_version); + + rd_kafka_toppar_keep(rktp); /* refcnt for OffsetRequest opaque*/ + + if (query_pos.offset <= RD_KAFKA_OFFSET_TAIL_BASE) + query_pos.offset = RD_KAFKA_OFFSET_END; + + offsets = rd_kafka_topic_partition_list_new(1); + rktpar = rd_kafka_topic_partition_list_add( + offsets, rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition); + rd_kafka_topic_partition_set_from_fetch_pos(rktpar, query_pos); + rd_kafka_topic_partition_set_current_leader_epoch( + rktpar, rktp->rktp_leader_epoch); + + rd_kafka_ListOffsetsRequest( + rkb, offsets, + RD_KAFKA_REPLYQ(rktp->rktp_ops, rktp->rktp_op_version), + rd_kafka_toppar_handle_Offset, rktp); + + rd_kafka_topic_partition_list_destroy(offsets); + } + + rd_kafka_toppar_set_fetch_state(rktp, + RD_KAFKA_TOPPAR_FETCH_OFFSET_WAIT); +} + + +/** + * Start fetching toppar. + * + * Locality: toppar handler thread + * Locks: none + */ +static void rd_kafka_toppar_fetch_start(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t pos, + rd_kafka_op_t *rko_orig) { + rd_kafka_cgrp_t *rkcg = rko_orig->rko_u.fetch_start.rkcg; + rd_kafka_resp_err_t err = 0; + int32_t version = rko_orig->rko_version; + + rd_kafka_toppar_lock(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "FETCH", + "Start fetch for %.*s [%" PRId32 + "] in " + "state %s at %s (v%" PRId32 ")", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_fetch_states[rktp->rktp_fetch_state], + rd_kafka_fetch_pos2str(pos), version); + + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_STOPPING) { + err = RD_KAFKA_RESP_ERR__PREV_IN_PROGRESS; + rd_kafka_toppar_unlock(rktp); + goto err_reply; + } + + rd_kafka_toppar_op_version_bump(rktp, version); + + if (rkcg) { + rd_kafka_assert(rktp->rktp_rkt->rkt_rk, !rktp->rktp_cgrp); + /* Attach toppar to cgrp */ + rktp->rktp_cgrp = rkcg; + rd_kafka_cgrp_op(rkcg, rktp, RD_KAFKA_NO_REPLYQ, + RD_KAFKA_OP_PARTITION_JOIN, 0); + } + + + if (pos.offset == RD_KAFKA_OFFSET_BEGINNING || + pos.offset == RD_KAFKA_OFFSET_END || + pos.offset <= RD_KAFKA_OFFSET_TAIL_BASE) { + rd_kafka_toppar_next_offset_handle(rktp, pos); + + } else if (pos.offset == RD_KAFKA_OFFSET_STORED) { + rd_kafka_offset_store_init(rktp); + + } else if (pos.offset == RD_KAFKA_OFFSET_INVALID) { + rd_kafka_offset_reset(rktp, RD_KAFKA_NODEID_UA, pos, + RD_KAFKA_RESP_ERR__NO_OFFSET, + "no previously committed offset " + "available"); + + } else { + rd_kafka_toppar_set_next_fetch_position(rktp, pos); + + rd_kafka_toppar_set_fetch_state(rktp, + RD_KAFKA_TOPPAR_FETCH_ACTIVE); + + /* Wake-up broker thread which might be idling on IO */ + if (rktp->rktp_broker) + rd_kafka_broker_wakeup(rktp->rktp_broker, + "fetch start"); + } + + rktp->rktp_offsets_fin.eof_offset = RD_KAFKA_OFFSET_INVALID; + + rd_kafka_toppar_unlock(rktp); + + /* Signal back to caller thread that start has commenced, or err */ +err_reply: + if (rko_orig->rko_replyq.q) { + rd_kafka_op_t *rko; + + rko = rd_kafka_op_new(RD_KAFKA_OP_FETCH_START); + + rko->rko_err = err; + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_kafka_replyq_enq(&rko_orig->rko_replyq, rko, 0); + } +} + + + +/** + * Mark toppar's fetch state as stopped (all decommissioning is done, + * offsets are stored, etc). + * + * Locality: toppar handler thread + * Locks: toppar_lock(rktp) MUST be held + */ +void rd_kafka_toppar_fetch_stopped(rd_kafka_toppar_t *rktp, + rd_kafka_resp_err_t err) { + + + rd_kafka_toppar_set_fetch_state(rktp, RD_KAFKA_TOPPAR_FETCH_STOPPED); + + rktp->rktp_app_pos.offset = RD_KAFKA_OFFSET_INVALID; + rktp->rktp_app_pos.leader_epoch = -1; + + if (rktp->rktp_cgrp) { + /* Detach toppar from cgrp */ + rd_kafka_cgrp_op(rktp->rktp_cgrp, rktp, RD_KAFKA_NO_REPLYQ, + RD_KAFKA_OP_PARTITION_LEAVE, 0); + rktp->rktp_cgrp = NULL; + } + + /* Signal back to application thread that stop is done. */ + if (rktp->rktp_replyq.q) { + rd_kafka_op_t *rko; + rko = + rd_kafka_op_new(RD_KAFKA_OP_FETCH_STOP | RD_KAFKA_OP_REPLY); + rko->rko_err = err; + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_kafka_replyq_enq(&rktp->rktp_replyq, rko, 0); + } +} + + +/** + * Stop toppar fetcher. + * This is usually an async operation. + * + * Locality: toppar handler thread + */ +void rd_kafka_toppar_fetch_stop(rd_kafka_toppar_t *rktp, + rd_kafka_op_t *rko_orig) { + int32_t version = rko_orig->rko_version; + + rd_kafka_toppar_lock(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "FETCH", + "Stopping fetch for %.*s [%" PRId32 "] in state %s (v%d)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_fetch_states[rktp->rktp_fetch_state], version); + + rd_kafka_toppar_op_version_bump(rktp, version); + + /* Abort pending offset lookups. */ + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_OFFSET_QUERY) + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1 /*lock*/); + + /* Clear out the forwarding queue. */ + rd_kafka_q_fwd_set(rktp->rktp_fetchq, NULL); + + /* Assign the future replyq to propagate stop results. */ + rd_kafka_assert(rktp->rktp_rkt->rkt_rk, rktp->rktp_replyq.q == NULL); + rktp->rktp_replyq = rko_orig->rko_replyq; + rd_kafka_replyq_clear(&rko_orig->rko_replyq); + + rd_kafka_toppar_set_fetch_state(rktp, RD_KAFKA_TOPPAR_FETCH_STOPPING); + + /* Stop offset store (possibly async). + * NOTE: will call .._stopped() if store finishes immediately, + * so no more operations after this call! */ + rd_kafka_offset_store_stop(rktp); + + rd_kafka_toppar_unlock(rktp); +} + + +/** + * Update a toppars offset. + * The toppar must have been previously FETCH_START:ed + * + * Locality: toppar handler thread + */ +void rd_kafka_toppar_seek(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t pos, + rd_kafka_op_t *rko_orig) { + rd_kafka_resp_err_t err = 0; + int32_t version = rko_orig->rko_version; + + rd_kafka_toppar_lock(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "FETCH", + "Seek %.*s [%" PRId32 "] to %s in state %s (v%" PRId32 ")", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_fetch_pos2str(pos), + rd_kafka_fetch_states[rktp->rktp_fetch_state], version); + + + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_STOPPING) { + err = RD_KAFKA_RESP_ERR__PREV_IN_PROGRESS; + goto err_reply; + } else if (!RD_KAFKA_TOPPAR_FETCH_IS_STARTED(rktp->rktp_fetch_state)) { + err = RD_KAFKA_RESP_ERR__STATE; + goto err_reply; + } else if (pos.offset == RD_KAFKA_OFFSET_STORED) { + err = RD_KAFKA_RESP_ERR__INVALID_ARG; + goto err_reply; + } + + rd_kafka_toppar_op_version_bump(rktp, version); + + /* Reset app offsets since seek()ing is analogue to a (re)assign(), + * and we want to avoid using the current app offset on resume() + * following a seek (#3567). */ + rktp->rktp_app_pos.offset = RD_KAFKA_OFFSET_INVALID; + rktp->rktp_app_pos.leader_epoch = -1; + + /* Abort pending offset lookups. */ + if (rktp->rktp_fetch_state == RD_KAFKA_TOPPAR_FETCH_OFFSET_QUERY) + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1 /*lock*/); + + if (pos.offset <= 0 || pos.validated) { + rd_kafka_toppar_next_offset_handle(rktp, pos); + } else { + rd_kafka_toppar_set_fetch_state( + rktp, RD_KAFKA_TOPPAR_FETCH_VALIDATE_EPOCH_WAIT); + rd_kafka_toppar_set_next_fetch_position(rktp, pos); + rd_kafka_offset_validate(rktp, "seek"); + } + + /* Signal back to caller thread that seek has commenced, or err */ +err_reply: + rd_kafka_toppar_unlock(rktp); + + if (rko_orig->rko_replyq.q) { + rd_kafka_op_t *rko; + + rko = rd_kafka_op_new(RD_KAFKA_OP_SEEK | RD_KAFKA_OP_REPLY); + + rko->rko_err = err; + rko->rko_u.fetch_start.pos = rko_orig->rko_u.fetch_start.pos; + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_kafka_replyq_enq(&rko_orig->rko_replyq, rko, 0); + } +} + + +/** + * @brief Pause/resume toppar. + * + * This is the internal handler of the pause/resume op. + * + * @locality toppar's handler thread + */ +static void rd_kafka_toppar_pause_resume(rd_kafka_toppar_t *rktp, + rd_kafka_op_t *rko_orig) { + rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk; + int pause = rko_orig->rko_u.pause.pause; + int flag = rko_orig->rko_u.pause.flag; + int32_t version = rko_orig->rko_version; + + rd_kafka_toppar_lock(rktp); + + rd_kafka_toppar_op_version_bump(rktp, version); + + if (!pause && (rktp->rktp_flags & flag) != flag) { + rd_kafka_dbg(rk, TOPIC, "RESUME", + "Not resuming %s [%" PRId32 + "]: " + "partition is not paused by %s", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, + (flag & RD_KAFKA_TOPPAR_F_APP_PAUSE ? "application" + : "library")); + rd_kafka_toppar_unlock(rktp); + return; + } + + if (pause) { + /* Pause partition by setting either + * RD_KAFKA_TOPPAR_F_APP_PAUSE or + * RD_KAFKA_TOPPAR_F_LIB_PAUSE */ + rktp->rktp_flags |= flag; + + if (rk->rk_type == RD_KAFKA_CONSUMER) { + /* Save offset of last consumed message+1 as the + * next message to fetch on resume. */ + if (rktp->rktp_app_pos.offset != + RD_KAFKA_OFFSET_INVALID) + rd_kafka_toppar_set_next_fetch_position( + rktp, rktp->rktp_app_pos); + + rd_kafka_dbg( + rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %s [%" PRId32 "]: at %s (state %s, v%d)", + pause ? "Pause" : "Resume", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, + rd_kafka_fetch_pos2str(rktp->rktp_next_fetch_start), + rd_kafka_fetch_states[rktp->rktp_fetch_state], + version); + } else { + rd_kafka_dbg( + rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %s [%" PRId32 "] (state %s, v%d)", + pause ? "Pause" : "Resume", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, + rd_kafka_fetch_states[rktp->rktp_fetch_state], + version); + } + + } else { + /* Unset the RD_KAFKA_TOPPAR_F_APP_PAUSE or + * RD_KAFKA_TOPPAR_F_LIB_PAUSE flag */ + rktp->rktp_flags &= ~flag; + + if (rk->rk_type == RD_KAFKA_CONSUMER) { + rd_kafka_dbg( + rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %s [%" PRId32 "]: at %s (state %s, v%d)", + rktp->rktp_fetch_state == + RD_KAFKA_TOPPAR_FETCH_ACTIVE + ? "Resuming" + : "Not resuming stopped", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, + rd_kafka_fetch_pos2str(rktp->rktp_next_fetch_start), + rd_kafka_fetch_states[rktp->rktp_fetch_state], + version); + + /* If the resuming offset is logical we + * need to trigger a seek (that performs the + * logical->absolute lookup logic) to get + * things going. + * Typical case is when a partition is paused + * before anything has been consumed by app + * yet thus having rktp_app_offset=INVALID. */ + if (!RD_KAFKA_TOPPAR_IS_PAUSED(rktp) && + (rktp->rktp_fetch_state == + RD_KAFKA_TOPPAR_FETCH_ACTIVE || + rktp->rktp_fetch_state == + RD_KAFKA_TOPPAR_FETCH_OFFSET_WAIT) && + rktp->rktp_next_fetch_start.offset == + RD_KAFKA_OFFSET_INVALID) + rd_kafka_toppar_next_offset_handle( + rktp, rktp->rktp_next_fetch_start); + + } else + rd_kafka_dbg( + rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %s [%" PRId32 "] (state %s, v%d)", + pause ? "Pause" : "Resume", + rktp->rktp_rkt->rkt_topic->str, + rktp->rktp_partition, + rd_kafka_fetch_states[rktp->rktp_fetch_state], + version); + } + rd_kafka_toppar_unlock(rktp); + + if (pause && rk->rk_type == RD_KAFKA_CONSUMER) { + /* Flush partition's fetch queue */ + rd_kafka_q_purge_toppar_version(rktp->rktp_fetchq, rktp, + rko_orig->rko_version); + } +} + + + +/** + * @brief Serve a toppar in a consumer broker thread. + * This is considered the fast path and should be minimal, + * mostly focusing on fetch related mechanisms. + * + * @returns the partition's Fetch backoff timestamp, or 0 if no backoff. + * + * @locality broker thread + * @locks none + */ +rd_ts_t rd_kafka_broker_consumer_toppar_serve(rd_kafka_broker_t *rkb, + rd_kafka_toppar_t *rktp) { + return rd_kafka_toppar_fetch_decide(rktp, rkb, 0); +} + + + +/** + * @brief Serve a toppar op + * + * @param rktp may be NULL for certain ops (OP_RECV_BUF) + * + * Will send an empty reply op if the request rko has a replyq set, + * providing synchronous operation. + * + * @locality toppar handler thread + */ +static rd_kafka_op_res_t rd_kafka_toppar_op_serve(rd_kafka_t *rk, + rd_kafka_q_t *rkq, + rd_kafka_op_t *rko, + rd_kafka_q_cb_type_t cb_type, + void *opaque) { + rd_kafka_toppar_t *rktp = NULL; + int outdated = 0; + + if (rko->rko_rktp) + rktp = rko->rko_rktp; + + if (rktp) { + outdated = + rd_kafka_op_version_outdated(rko, rktp->rktp_op_version); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "OP", + "%.*s [%" PRId32 + "] received %sop %s " + "(v%" PRId32 ") in fetch-state %s (opv%d)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, outdated ? "outdated " : "", + rd_kafka_op2str(rko->rko_type), rko->rko_version, + rd_kafka_fetch_states[rktp->rktp_fetch_state], + rktp->rktp_op_version); + + if (outdated) { +#if ENABLE_DEVEL + rd_kafka_op_print(stdout, "PART_OUTDATED", rko); +#endif + rd_kafka_op_reply(rko, RD_KAFKA_RESP_ERR__OUTDATED); + return RD_KAFKA_OP_RES_HANDLED; + } + } + + switch ((int)rko->rko_type) { + case RD_KAFKA_OP_FETCH_START: + rd_kafka_toppar_fetch_start(rktp, rko->rko_u.fetch_start.pos, + rko); + break; + + case RD_KAFKA_OP_FETCH_STOP: + rd_kafka_toppar_fetch_stop(rktp, rko); + break; + + case RD_KAFKA_OP_SEEK: + rd_kafka_toppar_seek(rktp, rko->rko_u.fetch_start.pos, rko); + break; + + case RD_KAFKA_OP_PAUSE: + rd_kafka_toppar_pause_resume(rktp, rko); + break; + + case RD_KAFKA_OP_OFFSET_COMMIT | RD_KAFKA_OP_REPLY: + rd_kafka_assert(NULL, rko->rko_u.offset_commit.cb); + rko->rko_u.offset_commit.cb(rk, rko->rko_err, + rko->rko_u.offset_commit.partitions, + rko->rko_u.offset_commit.opaque); + break; + + case RD_KAFKA_OP_OFFSET_FETCH | RD_KAFKA_OP_REPLY: { + /* OffsetFetch reply */ + rd_kafka_topic_partition_list_t *offsets = + rko->rko_u.offset_fetch.partitions; + rd_kafka_fetch_pos_t pos = {RD_KAFKA_OFFSET_INVALID, -1}; + + rktp = rd_kafka_topic_partition_get_toppar( + rk, &offsets->elems[0], rd_true /*create-on-miss*/); + + if (!rko->rko_err) { + /* Request succeeded but per-partition might have failed + */ + rko->rko_err = offsets->elems[0].err; + pos = rd_kafka_topic_partition_get_fetch_pos( + &offsets->elems[0]); + } + + rd_kafka_topic_partition_list_destroy(offsets); + rko->rko_u.offset_fetch.partitions = NULL; + + rd_kafka_timer_stop(&rktp->rktp_rkt->rkt_rk->rk_timers, + &rktp->rktp_offset_query_tmr, 1 /*lock*/); + + rd_kafka_toppar_lock(rktp); + + if (rko->rko_err) { + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC, "OFFSET", + "Failed to fetch offset for " + "%.*s [%" PRId32 "]: %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rd_kafka_err2str(rko->rko_err)); + + /* Keep on querying until we succeed. */ + rd_kafka_toppar_offset_retry(rktp, 500, + "failed to fetch offsets"); + rd_kafka_toppar_unlock(rktp); + + + /* Propagate error to application */ + if (rko->rko_err != RD_KAFKA_RESP_ERR__WAIT_COORD && + rko->rko_err != + RD_KAFKA_RESP_ERR_UNSTABLE_OFFSET_COMMIT) + rd_kafka_consumer_err( + rktp->rktp_fetchq, RD_KAFKA_NODEID_UA, + rko->rko_err, 0, NULL, rktp, + RD_KAFKA_OFFSET_INVALID, + "Failed to fetch " + "offsets from brokers: %s", + rd_kafka_err2str(rko->rko_err)); + + /* Refcount from get_toppar() */ + rd_kafka_toppar_destroy(rktp); + + break; + } + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "OFFSET", + "%.*s [%" PRId32 "]: OffsetFetch returned %s", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_fetch_pos2str(pos)); + + if (pos.offset > 0) + rktp->rktp_committed_pos = pos; + + if (pos.offset >= 0) + rd_kafka_toppar_next_offset_handle(rktp, pos); + else + rd_kafka_offset_reset(rktp, RD_KAFKA_NODEID_UA, pos, + RD_KAFKA_RESP_ERR__NO_OFFSET, + "no previously committed offset " + "available"); + rd_kafka_toppar_unlock(rktp); + + /* Refcount from get_toppar() */ + rd_kafka_toppar_destroy(rktp); + } break; + + default: + rd_kafka_assert(NULL, !*"unknown type"); + break; + } + + rd_kafka_op_reply(rko, RD_KAFKA_RESP_ERR_NO_ERROR); + + return RD_KAFKA_OP_RES_HANDLED; +} + + + +/** + * Send command op to toppar (handled by toppar's thread). + * + * Locality: any thread + */ +static void rd_kafka_toppar_op0(rd_kafka_toppar_t *rktp, + rd_kafka_op_t *rko, + rd_kafka_replyq_t replyq) { + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + rko->rko_replyq = replyq; + + rd_kafka_q_enq(rktp->rktp_ops, rko); +} + + +/** + * Send command op to toppar (handled by toppar's thread). + * + * Locality: any thread + */ +static void rd_kafka_toppar_op(rd_kafka_toppar_t *rktp, + rd_kafka_op_type_t type, + int32_t version, + rd_kafka_fetch_pos_t pos, + rd_kafka_cgrp_t *rkcg, + rd_kafka_replyq_t replyq) { + rd_kafka_op_t *rko; + + rko = rd_kafka_op_new(type); + rko->rko_version = version; + if (type == RD_KAFKA_OP_FETCH_START || type == RD_KAFKA_OP_SEEK) { + if (rkcg) + rko->rko_u.fetch_start.rkcg = rkcg; + rko->rko_u.fetch_start.pos = pos; + } + + rd_kafka_toppar_op0(rktp, rko, replyq); +} + + + +/** + * Start consuming partition (async operation). + * 'offset' is the initial offset + * 'fwdq' is an optional queue to forward messages to, if this is NULL + * then messages will be enqueued on rktp_fetchq. + * 'replyq' is an optional queue for handling the consume_start ack. + * + * This is the thread-safe interface that can be called from any thread. + */ +rd_kafka_resp_err_t rd_kafka_toppar_op_fetch_start(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t pos, + rd_kafka_q_t *fwdq, + rd_kafka_replyq_t replyq) { + int32_t version; + + rd_kafka_q_lock(rktp->rktp_fetchq); + if (fwdq && !(rktp->rktp_fetchq->rkq_flags & RD_KAFKA_Q_F_FWD_APP)) + rd_kafka_q_fwd_set0(rktp->rktp_fetchq, fwdq, 0, /* no do_lock */ + 0 /* no fwd_app */); + rd_kafka_q_unlock(rktp->rktp_fetchq); + + /* Bump version barrier. */ + version = rd_kafka_toppar_version_new_barrier(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "CONSUMER", + "Start consuming %.*s [%" PRId32 "] at %s (v%" PRId32 ")", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_fetch_pos2str(pos), + version); + + rd_kafka_toppar_op(rktp, RD_KAFKA_OP_FETCH_START, version, pos, + rktp->rktp_rkt->rkt_rk->rk_cgrp, replyq); + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * Stop consuming partition (async operatoin) + * This is thread-safe interface that can be called from any thread. + * + * Locality: any thread + */ +rd_kafka_resp_err_t rd_kafka_toppar_op_fetch_stop(rd_kafka_toppar_t *rktp, + rd_kafka_replyq_t replyq) { + int32_t version; + + /* Bump version barrier. */ + version = rd_kafka_toppar_version_new_barrier(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "CONSUMER", + "Stop consuming %.*s [%" PRId32 "] (v%" PRId32 ")", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, version); + + rd_kafka_toppar_op(rktp, RD_KAFKA_OP_FETCH_STOP, version, + RD_KAFKA_FETCH_POS(-1, -1), NULL, replyq); + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * @brief Set/Seek offset of a consumed partition (async operation). + * + * @param offset is the target offset. + * @param leader_epoch is the partition leader epoch, or -1. + * @param replyq is an optional queue for handling the ack. + * + * This is the thread-safe interface that can be called from any thread. + */ +rd_kafka_resp_err_t rd_kafka_toppar_op_seek(rd_kafka_toppar_t *rktp, + rd_kafka_fetch_pos_t pos, + rd_kafka_replyq_t replyq) { + int32_t version; + + /* Bump version barrier. */ + version = rd_kafka_toppar_version_new_barrier(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, "CONSUMER", + "Seek %.*s [%" PRId32 "] to %s (v%" PRId32 ")", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_fetch_pos2str(pos), + version); + + rd_kafka_toppar_op(rktp, RD_KAFKA_OP_SEEK, version, pos, NULL, replyq); + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * @brief Pause/resume partition (async operation). + * + * @param flag is either RD_KAFKA_TOPPAR_F_APP_PAUSE or .._F_LIB_PAUSE + * depending on if the app paused or librdkafka. + * @param pause is 1 for pausing or 0 for resuming. + * + * @locality any + */ +rd_kafka_resp_err_t rd_kafka_toppar_op_pause_resume(rd_kafka_toppar_t *rktp, + int pause, + int flag, + rd_kafka_replyq_t replyq) { + int32_t version; + rd_kafka_op_t *rko; + + /* Bump version barrier. */ + version = rd_kafka_toppar_version_new_barrier(rktp); + + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %.*s [%" PRId32 "] (v%" PRId32 ")", + pause ? "Pause" : "Resume", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, version); + + rko = rd_kafka_op_new(RD_KAFKA_OP_PAUSE); + rko->rko_version = version; + rko->rko_u.pause.pause = pause; + rko->rko_u.pause.flag = flag; + + rd_kafka_toppar_op0(rktp, rko, replyq); + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * @brief Pause a toppar (asynchronous). + * + * @param flag is either RD_KAFKA_TOPPAR_F_APP_PAUSE or .._F_LIB_PAUSE + * depending on if the app paused or librdkafka. + * + * @locality any + * @locks none needed + */ +void rd_kafka_toppar_pause(rd_kafka_toppar_t *rktp, int flag) { + rd_kafka_toppar_op_pause_resume(rktp, 1 /*pause*/, flag, + RD_KAFKA_NO_REPLYQ); +} + +/** + * @brief Resume a toppar (asynchronous). + * + * @param flag is either RD_KAFKA_TOPPAR_F_APP_PAUSE or .._F_LIB_PAUSE + * depending on if the app paused or librdkafka. + * + * @locality any + * @locks none needed + */ +void rd_kafka_toppar_resume(rd_kafka_toppar_t *rktp, int flag) { + rd_kafka_toppar_op_pause_resume(rktp, 1 /*pause*/, flag, + RD_KAFKA_NO_REPLYQ); +} + + + +/** + * @brief Pause or resume a list of partitions. + * + * @param flag is either RD_KAFKA_TOPPAR_F_APP_PAUSE or .._F_LIB_PAUSE + * depending on if the app paused or librdkafka. + * @param pause true for pausing, false for resuming. + * @param async RD_SYNC to wait for background thread to handle op, + * RD_ASYNC for asynchronous operation. + * + * @locality any + * + * @remark This is an asynchronous call, the actual pause/resume is performed + * by toppar_pause() in the toppar's handler thread. + */ +rd_kafka_resp_err_t +rd_kafka_toppars_pause_resume(rd_kafka_t *rk, + rd_bool_t pause, + rd_async_t async, + int flag, + rd_kafka_topic_partition_list_t *partitions) { + int i; + int waitcnt = 0; + rd_kafka_q_t *tmpq = NULL; + + if (!async) + tmpq = rd_kafka_q_new(rk); + + rd_kafka_dbg( + rk, TOPIC, pause ? "PAUSE" : "RESUME", "%s %s %d partition(s)", + flag & RD_KAFKA_TOPPAR_F_APP_PAUSE ? "Application" : "Library", + pause ? "pausing" : "resuming", partitions->cnt); + + for (i = 0; i < partitions->cnt; i++) { + rd_kafka_topic_partition_t *rktpar = &partitions->elems[i]; + rd_kafka_toppar_t *rktp; + + rktp = + rd_kafka_topic_partition_get_toppar(rk, rktpar, rd_false); + if (!rktp) { + rd_kafka_dbg(rk, TOPIC, pause ? "PAUSE" : "RESUME", + "%s %s [%" PRId32 + "]: skipped: " + "unknown partition", + pause ? "Pause" : "Resume", rktpar->topic, + rktpar->partition); + + rktpar->err = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + continue; + } + + rd_kafka_toppar_op_pause_resume(rktp, pause, flag, + RD_KAFKA_REPLYQ(tmpq, 0)); + + if (!async) + waitcnt++; + + rd_kafka_toppar_destroy(rktp); + + rktpar->err = RD_KAFKA_RESP_ERR_NO_ERROR; + } + + if (!async) { + while (waitcnt-- > 0) + rd_kafka_q_wait_result(tmpq, RD_POLL_INFINITE); + + rd_kafka_q_destroy_owner(tmpq); + } + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + + +/** + * Propagate error for toppar + */ +void rd_kafka_toppar_enq_error(rd_kafka_toppar_t *rktp, + rd_kafka_resp_err_t err, + const char *reason) { + rd_kafka_op_t *rko; + char buf[512]; + + rko = rd_kafka_op_new(RD_KAFKA_OP_ERR); + rko->rko_err = err; + rko->rko_rktp = rd_kafka_toppar_keep(rktp); + + rd_snprintf(buf, sizeof(buf), "%.*s [%" PRId32 "]: %s (%s)", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, reason, rd_kafka_err2str(err)); + + rko->rko_u.err.errstr = rd_strdup(buf); + + rd_kafka_q_enq(rktp->rktp_fetchq, rko); +} + + + +/** + * Returns the currently delegated broker for this toppar. + * If \p proper_broker is set NULL will be returned if current handler + * is not a proper broker (INTERNAL broker). + * + * The returned broker has an increased refcount. + * + * Locks: none + */ +rd_kafka_broker_t *rd_kafka_toppar_broker(rd_kafka_toppar_t *rktp, + int proper_broker) { + rd_kafka_broker_t *rkb; + rd_kafka_toppar_lock(rktp); + rkb = rktp->rktp_broker; + if (rkb) { + if (proper_broker && rkb->rkb_source == RD_KAFKA_INTERNAL) + rkb = NULL; + else + rd_kafka_broker_keep(rkb); + } + rd_kafka_toppar_unlock(rktp); + + return rkb; +} + + +/** + * @brief Take action when partition broker becomes unavailable. + * This should be called when requests fail with + * NOT_LEADER_FOR.. or similar error codes, e.g. ProduceRequest. + * + * @locks none + * @locality any + */ +void rd_kafka_toppar_leader_unavailable(rd_kafka_toppar_t *rktp, + const char *reason, + rd_kafka_resp_err_t err) { + rd_kafka_topic_t *rkt = rktp->rktp_rkt; + + rd_kafka_dbg(rkt->rkt_rk, TOPIC, "BROKERUA", + "%s [%" PRId32 "]: broker unavailable: %s: %s", + rkt->rkt_topic->str, rktp->rktp_partition, reason, + rd_kafka_err2str(err)); + + rd_kafka_topic_wrlock(rkt); + rkt->rkt_flags |= RD_KAFKA_TOPIC_F_LEADER_UNAVAIL; + rd_kafka_topic_wrunlock(rkt); + + rd_kafka_topic_fast_leader_query(rkt->rkt_rk); +} + + +const char * +rd_kafka_topic_partition_topic(const rd_kafka_topic_partition_t *rktpar) { + const rd_kafka_toppar_t *rktp = (const rd_kafka_toppar_t *)rktpar; + return rktp->rktp_rkt->rkt_topic->str; +} + +int32_t +rd_kafka_topic_partition_partition(const rd_kafka_topic_partition_t *rktpar) { + const rd_kafka_toppar_t *rktp = (const rd_kafka_toppar_t *)rktpar; + return rktp->rktp_partition; +} + +void rd_kafka_topic_partition_get(const rd_kafka_topic_partition_t *rktpar, + const char **name, + int32_t *partition) { + const rd_kafka_toppar_t *rktp = (const rd_kafka_toppar_t *)rktpar; + *name = rktp->rktp_rkt->rkt_topic->str; + *partition = rktp->rktp_partition; +} + + + +/** + * + * rd_kafka_topic_partition_t lists + * Fixed-size non-growable list of partitions for propagation to application. + * + */ + + +static void +rd_kafka_topic_partition_list_grow(rd_kafka_topic_partition_list_t *rktparlist, + int add_size) { + if (add_size < rktparlist->size) + add_size = RD_MAX(rktparlist->size, 32); + + rktparlist->size += add_size; + rktparlist->elems = rd_realloc( + rktparlist->elems, sizeof(*rktparlist->elems) * rktparlist->size); +} + + +/** + * @brief Initialize a list for fitting \p size partitions. + */ +void rd_kafka_topic_partition_list_init( + rd_kafka_topic_partition_list_t *rktparlist, + int size) { + memset(rktparlist, 0, sizeof(*rktparlist)); + + if (size > 0) + rd_kafka_topic_partition_list_grow(rktparlist, size); +} + + +/** + * Create a list for fitting 'size' topic_partitions (rktp). + */ +rd_kafka_topic_partition_list_t *rd_kafka_topic_partition_list_new(int size) { + rd_kafka_topic_partition_list_t *rktparlist; + + rktparlist = rd_calloc(1, sizeof(*rktparlist)); + + if (size > 0) + rd_kafka_topic_partition_list_grow(rktparlist, size); + + return rktparlist; +} + + + +rd_kafka_topic_partition_t *rd_kafka_topic_partition_new(const char *topic, + int32_t partition) { + rd_kafka_topic_partition_t *rktpar = rd_calloc(1, sizeof(*rktpar)); + + rktpar->topic = rd_strdup(topic); + rktpar->partition = partition; + + return rktpar; +} + +/** + * @brief Update \p dst with info from \p src. + */ +static void +rd_kafka_topic_partition_update(rd_kafka_topic_partition_t *dst, + const rd_kafka_topic_partition_t *src) { + const rd_kafka_topic_partition_private_t *srcpriv; + rd_kafka_topic_partition_private_t *dstpriv; + + rd_dassert(!strcmp(dst->topic, src->topic)); + rd_dassert(dst->partition == src->partition); + rd_dassert(dst != src); + + dst->offset = src->offset; + dst->opaque = src->opaque; + dst->err = src->err; + + if (src->metadata_size > 0) { + dst->metadata = rd_malloc(src->metadata_size); + dst->metadata_size = src->metadata_size; + ; + memcpy(dst->metadata, src->metadata, dst->metadata_size); + } + + if ((srcpriv = src->_private)) { + dstpriv = rd_kafka_topic_partition_get_private(dst); + if (srcpriv->rktp && !dstpriv->rktp) + dstpriv->rktp = rd_kafka_toppar_keep(srcpriv->rktp); + + rd_assert(dstpriv->rktp == srcpriv->rktp); + + dstpriv->leader_epoch = srcpriv->leader_epoch; + + } else if ((dstpriv = dst->_private)) { + /* No private object in source, reset the leader epoch. */ + dstpriv->leader_epoch = -1; + } +} + + +rd_kafka_topic_partition_t * +rd_kafka_topic_partition_copy(const rd_kafka_topic_partition_t *src) { + rd_kafka_topic_partition_t *dst = + rd_kafka_topic_partition_new(src->topic, src->partition); + + rd_kafka_topic_partition_update(dst, src); + + return dst; +} + + +/** Same as above but with generic void* signature */ +void *rd_kafka_topic_partition_copy_void(const void *src) { + return rd_kafka_topic_partition_copy(src); +} + + +rd_kafka_topic_partition_t * +rd_kafka_topic_partition_new_from_rktp(rd_kafka_toppar_t *rktp) { + rd_kafka_topic_partition_t *rktpar = rd_calloc(1, sizeof(*rktpar)); + + rktpar->topic = RD_KAFKAP_STR_DUP(rktp->rktp_rkt->rkt_topic); + rktpar->partition = rktp->rktp_partition; + + return rktpar; +} + +/** + * @brief Destroy a partition private glue object. + */ +static void rd_kafka_topic_partition_private_destroy( + rd_kafka_topic_partition_private_t *parpriv) { + if (parpriv->rktp) + rd_kafka_toppar_destroy(parpriv->rktp); + rd_free(parpriv); +} + +static void +rd_kafka_topic_partition_destroy0(rd_kafka_topic_partition_t *rktpar, + int do_free) { + if (rktpar->topic) + rd_free(rktpar->topic); + if (rktpar->metadata) + rd_free(rktpar->metadata); + if (rktpar->_private) + rd_kafka_topic_partition_private_destroy( + (rd_kafka_topic_partition_private_t *)rktpar->_private); + + if (do_free) + rd_free(rktpar); +} + + +int32_t rd_kafka_topic_partition_get_leader_epoch( + const rd_kafka_topic_partition_t *rktpar) { + const rd_kafka_topic_partition_private_t *parpriv; + + if (!(parpriv = rktpar->_private)) + return -1; + + return parpriv->leader_epoch; +} + +void rd_kafka_topic_partition_set_leader_epoch( + rd_kafka_topic_partition_t *rktpar, + int32_t leader_epoch) { + rd_kafka_topic_partition_private_t *parpriv; + + /* Avoid allocating private_t if clearing the epoch */ + if (leader_epoch == -1 && !rktpar->_private) + return; + + parpriv = rd_kafka_topic_partition_get_private(rktpar); + + parpriv->leader_epoch = leader_epoch; +} + +int32_t rd_kafka_topic_partition_get_current_leader_epoch( + const rd_kafka_topic_partition_t *rktpar) { + const rd_kafka_topic_partition_private_t *parpriv; + + if (!(parpriv = rktpar->_private)) + return -1; + + return parpriv->current_leader_epoch; +} + +void rd_kafka_topic_partition_set_current_leader_epoch( + rd_kafka_topic_partition_t *rktpar, + int32_t current_leader_epoch) { + rd_kafka_topic_partition_private_t *parpriv; + + /* Avoid allocating private_t if clearing the epoch */ + if (current_leader_epoch == -1 && !rktpar->_private) + return; + + parpriv = rd_kafka_topic_partition_get_private(rktpar); + + parpriv->current_leader_epoch = current_leader_epoch; +} + +/** + * @brief Set offset and leader epoch from a fetchpos. + */ +void rd_kafka_topic_partition_set_from_fetch_pos( + rd_kafka_topic_partition_t *rktpar, + const rd_kafka_fetch_pos_t fetchpos) { + rktpar->offset = fetchpos.offset; + rd_kafka_topic_partition_set_leader_epoch(rktpar, + fetchpos.leader_epoch); +} + +/** + * @brief Destroy all partitions in list. + * + * @remark The allocated size of the list will not shrink. + */ +void rd_kafka_topic_partition_list_clear( + rd_kafka_topic_partition_list_t *rktparlist) { + int i; + + for (i = 0; i < rktparlist->cnt; i++) + rd_kafka_topic_partition_destroy0(&rktparlist->elems[i], 0); + + rktparlist->cnt = 0; +} + + +void rd_kafka_topic_partition_destroy_free(void *ptr) { + rd_kafka_topic_partition_destroy0(ptr, rd_true /*do_free*/); +} + +void rd_kafka_topic_partition_destroy(rd_kafka_topic_partition_t *rktpar) { + rd_kafka_topic_partition_destroy0(rktpar, 1); +} + + +/** + * Destroys a list previously created with .._list_new() and drops + * any references to contained toppars. + */ +void rd_kafka_topic_partition_list_destroy( + rd_kafka_topic_partition_list_t *rktparlist) { + int i; + + for (i = 0; i < rktparlist->cnt; i++) + rd_kafka_topic_partition_destroy0(&rktparlist->elems[i], 0); + + if (rktparlist->elems) + rd_free(rktparlist->elems); + + rd_free(rktparlist); +} + + +/** + * @brief Wrapper for rd_kafka_topic_partition_list_destroy() that + * matches the standard free(void *) signature, for callback use. + */ +void rd_kafka_topic_partition_list_destroy_free(void *ptr) { + rd_kafka_topic_partition_list_destroy( + (rd_kafka_topic_partition_list_t *)ptr); +} + + +/** + * @brief Add a partition to an rktpar list. + * The list must have enough room to fit it. + * + * @param rktp Optional partition object that will be stored on the + * ._private object (with refcount increased). + * + * @returns a pointer to the added element. + */ +rd_kafka_topic_partition_t *rd_kafka_topic_partition_list_add0( + const char *func, + int line, + rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition, + rd_kafka_toppar_t *rktp, + const rd_kafka_topic_partition_private_t *parpriv) { + rd_kafka_topic_partition_t *rktpar; + if (rktparlist->cnt == rktparlist->size) + rd_kafka_topic_partition_list_grow(rktparlist, 1); + rd_kafka_assert(NULL, rktparlist->cnt < rktparlist->size); + + rktpar = &rktparlist->elems[rktparlist->cnt++]; + memset(rktpar, 0, sizeof(*rktpar)); + rktpar->topic = rd_strdup(topic); + rktpar->partition = partition; + rktpar->offset = RD_KAFKA_OFFSET_INVALID; + + if (parpriv) { + rd_kafka_topic_partition_private_t *parpriv_copy = + rd_kafka_topic_partition_get_private(rktpar); + if (parpriv->rktp) { + parpriv_copy->rktp = + rd_kafka_toppar_keep_fl(func, line, parpriv->rktp); + } + parpriv_copy->leader_epoch = parpriv->leader_epoch; + parpriv_copy->current_leader_epoch = parpriv->leader_epoch; + } else if (rktp) { + rd_kafka_topic_partition_private_t *parpriv_copy = + rd_kafka_topic_partition_get_private(rktpar); + parpriv_copy->rktp = rd_kafka_toppar_keep_fl(func, line, rktp); + } + + return rktpar; +} + + +rd_kafka_topic_partition_t * +rd_kafka_topic_partition_list_add(rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition) { + return rd_kafka_topic_partition_list_add0( + __FUNCTION__, __LINE__, rktparlist, topic, partition, NULL, NULL); +} + + +/** + * Adds a consecutive list of partitions to a list + */ +void rd_kafka_topic_partition_list_add_range( + rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t start, + int32_t stop) { + + for (; start <= stop; start++) + rd_kafka_topic_partition_list_add(rktparlist, topic, start); +} + + +rd_kafka_topic_partition_t *rd_kafka_topic_partition_list_upsert( + rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition) { + rd_kafka_topic_partition_t *rktpar; + + if ((rktpar = rd_kafka_topic_partition_list_find(rktparlist, topic, + partition))) + return rktpar; + + return rd_kafka_topic_partition_list_add(rktparlist, topic, partition); +} + + + +/** + * @brief Creates a copy of \p rktpar and adds it to \p rktparlist + */ +void rd_kafka_topic_partition_list_add_copy( + rd_kafka_topic_partition_list_t *rktparlist, + const rd_kafka_topic_partition_t *rktpar) { + rd_kafka_topic_partition_t *dst; + + dst = rd_kafka_topic_partition_list_add0( + __FUNCTION__, __LINE__, rktparlist, rktpar->topic, + rktpar->partition, NULL, rktpar->_private); + rd_kafka_topic_partition_update(dst, rktpar); +} + + + +/** + * Create and return a copy of list 'src' + */ +rd_kafka_topic_partition_list_t * +rd_kafka_topic_partition_list_copy(const rd_kafka_topic_partition_list_t *src) { + rd_kafka_topic_partition_list_t *dst; + int i; + + dst = rd_kafka_topic_partition_list_new(src->size); + + for (i = 0; i < src->cnt; i++) + rd_kafka_topic_partition_list_add_copy(dst, &src->elems[i]); + return dst; +} + +/** + * @brief Same as rd_kafka_topic_partition_list_copy() but suitable for + * rd_list_copy(). The \p opaque is ignored. + */ +void *rd_kafka_topic_partition_list_copy_opaque(const void *src, void *opaque) { + return rd_kafka_topic_partition_list_copy(src); +} + +/** + * @brief Append copies of all elements in \p src to \p dst. + * No duplicate-checks are performed. + */ +void rd_kafka_topic_partition_list_add_list( + rd_kafka_topic_partition_list_t *dst, + const rd_kafka_topic_partition_list_t *src) { + int i; + + if (src->cnt == 0) + return; + + if (dst->size < dst->cnt + src->cnt) + rd_kafka_topic_partition_list_grow(dst, src->cnt); + + for (i = 0; i < src->cnt; i++) + rd_kafka_topic_partition_list_add_copy(dst, &src->elems[i]); +} + + +/** + * @brief Compare two partition lists using partition comparator \p cmp. + * + * @warning This is an O(Na*Nb) operation. + */ +int rd_kafka_topic_partition_list_cmp(const void *_a, + const void *_b, + int (*cmp)(const void *, const void *)) { + const rd_kafka_topic_partition_list_t *a = _a, *b = _b; + int r; + int i; + + r = a->cnt - b->cnt; + if (r || a->cnt == 0) + return r; + + /* Since the lists may not be sorted we need to scan all of B + * for each element in A. + * FIXME: If the list sizes are larger than X we could create a + * temporary hash map instead. */ + for (i = 0; i < a->cnt; i++) { + int j; + + for (j = 0; j < b->cnt; j++) { + r = cmp(&a->elems[i], &b->elems[j]); + if (!r) + break; + } + + if (j == b->cnt) + return 1; + } + + return 0; +} + + +/** + * @brief Ensures the \p rktpar has a toppar set in _private. + * + * @returns the toppar object (or possibly NULL if \p create_on_miss is true) + * WITHOUT refcnt increased. + */ +rd_kafka_toppar_t * +rd_kafka_topic_partition_ensure_toppar(rd_kafka_t *rk, + rd_kafka_topic_partition_t *rktpar, + rd_bool_t create_on_miss) { + rd_kafka_topic_partition_private_t *parpriv; + + parpriv = rd_kafka_topic_partition_get_private(rktpar); + + if (!parpriv->rktp) + parpriv->rktp = rd_kafka_toppar_get2( + rk, rktpar->topic, rktpar->partition, + 0 /* not ua on miss */, create_on_miss); + + return parpriv->rktp; +} + + +int rd_kafka_topic_partition_cmp(const void *_a, const void *_b) { + const rd_kafka_topic_partition_t *a = _a; + const rd_kafka_topic_partition_t *b = _b; + int r = strcmp(a->topic, b->topic); + if (r) + return r; + else + return RD_CMP(a->partition, b->partition); +} + +/** @brief Compare only the topic */ +int rd_kafka_topic_partition_cmp_topic(const void *_a, const void *_b) { + const rd_kafka_topic_partition_t *a = _a; + const rd_kafka_topic_partition_t *b = _b; + return strcmp(a->topic, b->topic); +} + +static int rd_kafka_topic_partition_cmp_opaque(const void *_a, + const void *_b, + void *opaque) { + return rd_kafka_topic_partition_cmp(_a, _b); +} + +/** @returns a hash of the topic and partition */ +unsigned int rd_kafka_topic_partition_hash(const void *_a) { + const rd_kafka_topic_partition_t *a = _a; + int r = 31 * 17 + a->partition; + return 31 * r + rd_string_hash(a->topic, -1); +} + + + +/** + * @brief Search 'rktparlist' for 'topic' and 'partition'. + * @returns the elems[] index or -1 on miss. + */ +static int rd_kafka_topic_partition_list_find0( + const rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition, + int (*cmp)(const void *, const void *)) { + rd_kafka_topic_partition_t skel; + int i; + + skel.topic = (char *)topic; + skel.partition = partition; + + for (i = 0; i < rktparlist->cnt; i++) { + if (!cmp(&skel, &rktparlist->elems[i])) + return i; + } + + return -1; +} + +rd_kafka_topic_partition_t *rd_kafka_topic_partition_list_find( + const rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition) { + int i = rd_kafka_topic_partition_list_find0( + rktparlist, topic, partition, rd_kafka_topic_partition_cmp); + if (i == -1) + return NULL; + else + return &rktparlist->elems[i]; +} + + +int rd_kafka_topic_partition_list_find_idx( + const rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition) { + return rd_kafka_topic_partition_list_find0( + rktparlist, topic, partition, rd_kafka_topic_partition_cmp); +} + + +/** + * @returns the first element that matches \p topic, regardless of partition. + */ +rd_kafka_topic_partition_t *rd_kafka_topic_partition_list_find_topic( + const rd_kafka_topic_partition_list_t *rktparlist, + const char *topic) { + int i = rd_kafka_topic_partition_list_find0( + rktparlist, topic, RD_KAFKA_PARTITION_UA, + rd_kafka_topic_partition_cmp_topic); + if (i == -1) + return NULL; + else + return &rktparlist->elems[i]; +} + + +int rd_kafka_topic_partition_list_del_by_idx( + rd_kafka_topic_partition_list_t *rktparlist, + int idx) { + if (unlikely(idx < 0 || idx >= rktparlist->cnt)) + return 0; + + rd_kafka_topic_partition_destroy0(&rktparlist->elems[idx], 0); + memmove(&rktparlist->elems[idx], &rktparlist->elems[idx + 1], + (rktparlist->cnt - idx - 1) * sizeof(rktparlist->elems[idx])); + rktparlist->cnt--; + + return 1; +} + + +int rd_kafka_topic_partition_list_del( + rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition) { + int i = rd_kafka_topic_partition_list_find0( + rktparlist, topic, partition, rd_kafka_topic_partition_cmp); + if (i == -1) + return 0; + + return rd_kafka_topic_partition_list_del_by_idx(rktparlist, i); +} + + + +/** + * Returns true if 'topic' matches the 'rktpar', else false. + * On match, if rktpar is a regex pattern then 'matched_by_regex' is set to 1. + */ +int rd_kafka_topic_partition_match(rd_kafka_t *rk, + const rd_kafka_group_member_t *rkgm, + const rd_kafka_topic_partition_t *rktpar, + const char *topic, + int *matched_by_regex) { + int ret = 0; + + if (*rktpar->topic == '^') { + char errstr[128]; + + ret = rd_regex_match(rktpar->topic, topic, errstr, + sizeof(errstr)); + if (ret == -1) { + rd_kafka_dbg(rk, CGRP, "SUBMATCH", + "Invalid regex for member " + "\"%.*s\" subscription \"%s\": %s", + RD_KAFKAP_STR_PR(rkgm->rkgm_member_id), + rktpar->topic, errstr); + return 0; + } + + if (ret && matched_by_regex) + *matched_by_regex = 1; + + } else if (!strcmp(rktpar->topic, topic)) { + + if (matched_by_regex) + *matched_by_regex = 0; + + ret = 1; + } + + return ret; +} + + + +void rd_kafka_topic_partition_list_sort( + rd_kafka_topic_partition_list_t *rktparlist, + int (*cmp)(const void *, const void *, void *), + void *opaque) { + + if (!cmp) + cmp = rd_kafka_topic_partition_cmp_opaque; + + rd_qsort_r(rktparlist->elems, rktparlist->cnt, + sizeof(*rktparlist->elems), cmp, opaque); +} + + +void rd_kafka_topic_partition_list_sort_by_topic( + rd_kafka_topic_partition_list_t *rktparlist) { + rd_kafka_topic_partition_list_sort( + rktparlist, rd_kafka_topic_partition_cmp_opaque, NULL); +} + +rd_kafka_resp_err_t rd_kafka_topic_partition_list_set_offset( + rd_kafka_topic_partition_list_t *rktparlist, + const char *topic, + int32_t partition, + int64_t offset) { + rd_kafka_topic_partition_t *rktpar; + + if (!(rktpar = rd_kafka_topic_partition_list_find(rktparlist, topic, + partition))) + return RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + + rktpar->offset = offset; + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * @brief Reset all offsets to the provided value. + */ +void rd_kafka_topic_partition_list_reset_offsets( + rd_kafka_topic_partition_list_t *rktparlist, + int64_t offset) { + + int i; + for (i = 0; i < rktparlist->cnt; i++) + rktparlist->elems[i].offset = offset; +} + + +/** + * Set offset values in partition list based on toppar's last stored offset. + * + * from_rktp - true: set rktp's last stored offset, false: set def_value + * unless a concrete offset is set. + * is_commit: indicates that set offset is to be committed (for debug log) + * + * Returns the number of valid non-logical offsets (>=0). + */ +int rd_kafka_topic_partition_list_set_offsets( + rd_kafka_t *rk, + rd_kafka_topic_partition_list_t *rktparlist, + int from_rktp, + int64_t def_value, + int is_commit) { + int i; + int valid_cnt = 0; + + for (i = 0; i < rktparlist->cnt; i++) { + rd_kafka_topic_partition_t *rktpar = &rktparlist->elems[i]; + const char *verb = "setting"; + char preamble[128]; + + *preamble = '\0'; /* Avoid warning */ + + if (from_rktp) { + rd_kafka_toppar_t *rktp = + rd_kafka_topic_partition_ensure_toppar(rk, rktpar, + rd_true); + rd_kafka_toppar_lock(rktp); + + if (rk->rk_conf.debug & + (RD_KAFKA_DBG_CGRP | RD_KAFKA_DBG_TOPIC)) + rd_snprintf(preamble, sizeof(preamble), + "stored %s, committed %s: ", + rd_kafka_fetch_pos2str( + rktp->rktp_stored_pos), + rd_kafka_fetch_pos2str( + rktp->rktp_committed_pos)); + + if (rd_kafka_fetch_pos_cmp(&rktp->rktp_stored_pos, + &rktp->rktp_committed_pos) > + 0) { + verb = "setting stored"; + rd_kafka_topic_partition_set_from_fetch_pos( + rktpar, rktp->rktp_stored_pos); + } else { + rktpar->offset = RD_KAFKA_OFFSET_INVALID; + } + rd_kafka_toppar_unlock(rktp); + } else { + if (RD_KAFKA_OFFSET_IS_LOGICAL(rktpar->offset)) { + verb = "setting default"; + rktpar->offset = def_value; + rd_kafka_topic_partition_set_leader_epoch( + rktpar, -1); + } else + verb = "keeping"; + } + + if (is_commit && rktpar->offset == RD_KAFKA_OFFSET_INVALID) + rd_kafka_dbg(rk, CGRP | RD_KAFKA_DBG_TOPIC, "OFFSET", + "Topic %s [%" PRId32 + "]: " + "%snot including in commit", + rktpar->topic, rktpar->partition, + preamble); + else + rd_kafka_dbg( + rk, CGRP | RD_KAFKA_DBG_TOPIC, "OFFSET", + "Topic %s [%" PRId32 + "]: " + "%s%s offset %s (leader epoch %" PRId32 ") %s", + rktpar->topic, rktpar->partition, preamble, verb, + rd_kafka_offset2str(rktpar->offset), + rd_kafka_topic_partition_get_leader_epoch(rktpar), + is_commit ? " for commit" : ""); + + if (!RD_KAFKA_OFFSET_IS_LOGICAL(rktpar->offset)) + valid_cnt++; + } + + return valid_cnt; +} + + +/** + * @returns the number of partitions with absolute (non-logical) offsets set. + */ +int rd_kafka_topic_partition_list_count_abs_offsets( + const rd_kafka_topic_partition_list_t *rktparlist) { + int i; + int valid_cnt = 0; + + for (i = 0; i < rktparlist->cnt; i++) + if (!RD_KAFKA_OFFSET_IS_LOGICAL(rktparlist->elems[i].offset)) + valid_cnt++; + + return valid_cnt; +} + + +/** + * @brief Update _private (toppar) field to point to valid rktp + * for each parition. + * + * @param create_on_miss Create partition (and topic_t object) if necessary. + */ +void rd_kafka_topic_partition_list_update_toppars( + rd_kafka_t *rk, + rd_kafka_topic_partition_list_t *rktparlist, + rd_bool_t create_on_miss) { + int i; + for (i = 0; i < rktparlist->cnt; i++) { + rd_kafka_topic_partition_t *rktpar = &rktparlist->elems[i]; + + rd_kafka_topic_partition_ensure_toppar(rk, rktpar, + create_on_miss); + } +} + + +/** + * @brief Populate \p leaders with the leaders+partitions for the partitions in + * \p rktparlist. Duplicates are suppressed. + * + * If no leader is found for a partition that element's \c .err will + * be set to RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE. + * + * If the partition does not exist \c .err will be set to + * RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION. + * + * @param rktparlist The partitions to look up leaders for, the .err field + * will be set according to outcome, e.g., ERR_NO_ERROR, + * ERR_UNKNOWN_TOPIC_OR_PART, etc. + * @param leaders rd_list_t of allocated (struct rd_kafka_partition_leader *) + * @param query_topics (optional) rd_list of strdupped (char *) + * @param query_unknown Add unknown topics to \p query_topics. + * @param eonce (optional) For triggering asynchronously on cache change + * in case not all leaders are known now. + * + * @remark This is based on the current topic_t and partition state + * which may lag behind the last metadata update due to internal + * threading and also the fact that no topic_t may have been created. + * + * @param leaders rd_list_t of type (struct rd_kafka_partition_leader *) + * + * @returns true if all partitions have leaders, else false. + * + * @sa rd_kafka_topic_partition_list_get_leaders_by_metadata + * + * @locks rd_kafka_*lock() MUST NOT be held + */ +static rd_bool_t rd_kafka_topic_partition_list_get_leaders( + rd_kafka_t *rk, + rd_kafka_topic_partition_list_t *rktparlist, + rd_list_t *leaders, + rd_list_t *query_topics, + rd_bool_t query_unknown, + rd_kafka_enq_once_t *eonce) { + rd_bool_t complete; + int cnt = 0; + int i; + + if (eonce) + rd_kafka_wrlock(rk); + else + rd_kafka_rdlock(rk); + + for (i = 0; i < rktparlist->cnt; i++) { + rd_kafka_topic_partition_t *rktpar = &rktparlist->elems[i]; + rd_kafka_topic_partition_t *rktpar2; + rd_kafka_broker_t *rkb = NULL; + struct rd_kafka_partition_leader leader_skel; + struct rd_kafka_partition_leader *leader; + const rd_kafka_metadata_topic_t *mtopic; + const rd_kafka_metadata_partition_t *mpart; + rd_bool_t topic_wait_cache; + + rd_kafka_metadata_cache_topic_partition_get( + rk, &mtopic, &mpart, rktpar->topic, rktpar->partition, + 0 /*negative entries too*/); + + topic_wait_cache = + !mtopic || + RD_KAFKA_METADATA_CACHE_ERR_IS_TEMPORARY(mtopic->err); + + if (!topic_wait_cache && mtopic && + mtopic->err != RD_KAFKA_RESP_ERR_NO_ERROR && + mtopic->err != RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE) { + /* Topic permanently errored */ + rktpar->err = mtopic->err; + continue; + } + + if (mtopic && !mpart && mtopic->partition_cnt > 0) { + /* Topic exists but partition doesnt. + * This is a permanent error. */ + rktpar->err = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + continue; + } + + if (mpart && + (mpart->leader == -1 || + !(rkb = rd_kafka_broker_find_by_nodeid0( + rk, mpart->leader, -1 /*any state*/, rd_false)))) { + /* Partition has no (valid) leader. + * This is a permanent error. */ + rktpar->err = + mtopic->err + ? mtopic->err + : RD_KAFKA_RESP_ERR_LEADER_NOT_AVAILABLE; + continue; + } + + if (topic_wait_cache || !rkb) { + /* Topic unknown or no current leader for partition, + * add topic to query list. */ + rktpar->err = RD_KAFKA_RESP_ERR__IN_PROGRESS; + if (query_topics && + !rd_list_find(query_topics, rktpar->topic, + (void *)strcmp)) + rd_list_add(query_topics, + rd_strdup(rktpar->topic)); + continue; + } + + /* Leader exists, add to leader list. */ + + rktpar->err = RD_KAFKA_RESP_ERR_NO_ERROR; + + memset(&leader_skel, 0, sizeof(leader_skel)); + leader_skel.rkb = rkb; + + leader = rd_list_find(leaders, &leader_skel, + rd_kafka_partition_leader_cmp); + + if (!leader) { + leader = rd_kafka_partition_leader_new(rkb); + rd_list_add(leaders, leader); + } + + rktpar2 = rd_kafka_topic_partition_list_find( + leader->partitions, rktpar->topic, rktpar->partition); + if (rktpar2) { + /* Already exists in partitions list, just update. */ + rd_kafka_topic_partition_update(rktpar2, rktpar); + } else { + /* Make a copy of rktpar and add to partitions list */ + rd_kafka_topic_partition_list_add_copy( + leader->partitions, rktpar); + } + + rktpar->err = RD_KAFKA_RESP_ERR_NO_ERROR; + + rd_kafka_broker_destroy(rkb); /* loose refcount */ + cnt++; + } + + complete = cnt == rktparlist->cnt; + + if (!complete && eonce) + /* Add eonce to cache observers */ + rd_kafka_metadata_cache_wait_state_change_async(rk, eonce); + + if (eonce) + rd_kafka_wrunlock(rk); + else + rd_kafka_rdunlock(rk); + + return complete; +} + + +/** + * @brief Timer timeout callback for query_leaders_async rko's eonce object. + */ +static void +rd_kafka_partition_leader_query_eonce_timeout_cb(rd_kafka_timers_t *rkts, + void *arg) { + rd_kafka_enq_once_t *eonce = arg; + rd_kafka_enq_once_trigger(eonce, RD_KAFKA_RESP_ERR__TIMED_OUT, + "timeout timer"); +} + + +/** + * @brief Query timer callback for query_leaders_async rko's eonce object. + */ +static void +rd_kafka_partition_leader_query_eonce_timer_cb(rd_kafka_timers_t *rkts, + void *arg) { + rd_kafka_enq_once_t *eonce = arg; + rd_kafka_enq_once_trigger(eonce, RD_KAFKA_RESP_ERR_NO_ERROR, + "query timer"); +} + + +/** + * @brief Query metadata cache for partition leaders, or trigger metadata + * refresh if leaders not known. + * + * @locks_required none + * @locality any + */ +static rd_kafka_op_res_t +rd_kafka_topic_partition_list_query_leaders_async_worker(rd_kafka_op_t *rko) { + rd_kafka_t *rk = rko->rko_rk; + rd_list_t query_topics, *leaders = NULL; + rd_kafka_op_t *reply; + + RD_KAFKA_OP_TYPE_ASSERT(rko, RD_KAFKA_OP_LEADERS); + + if (rko->rko_err) + goto reply; /* Timeout or ERR__DESTROY */ + + /* Since we're iterating over get_leaders() until all partition leaders + * are known we need to re-enable the eonce to be triggered again (which + * is not necessary the first time we get here, but there + * is no harm doing it then either). */ + rd_kafka_enq_once_reenable(rko->rko_u.leaders.eonce, rko, + RD_KAFKA_REPLYQ(rk->rk_ops, 0)); + + /* Look up the leaders in the metadata cache, if not all leaders + * are known the eonce is registered for metadata cache changes + * which will cause our function to be called + * again on (any) metadata cache change. + * + * When we are called again we perform the cache lookup again and + * hopefully get all leaders, otherwise defer a new async wait. + * Repeat until success or timeout. */ + + rd_list_init(&query_topics, 4 + rko->rko_u.leaders.partitions->cnt / 2, + rd_free); + + leaders = rd_list_new(1 + rko->rko_u.leaders.partitions->cnt / 2, + rd_kafka_partition_leader_destroy_free); + + if (rd_kafka_topic_partition_list_get_leaders( + rk, rko->rko_u.leaders.partitions, leaders, &query_topics, + /* Add unknown topics to query_topics only on the + * first query, after that we consider them permanently + * non-existent */ + rko->rko_u.leaders.query_cnt == 0, rko->rko_u.leaders.eonce)) { + /* All leaders now known (or failed), reply to caller */ + rd_list_destroy(&query_topics); + goto reply; + } + + if (rd_list_empty(&query_topics)) { + /* Not all leaders known but no topics left to query, + * reply to caller. */ + rd_list_destroy(&query_topics); + goto reply; + } + + /* Need to refresh topic metadata, but at most every interval. */ + if (!rd_kafka_timer_is_started(&rk->rk_timers, + &rko->rko_u.leaders.query_tmr)) { + + rko->rko_u.leaders.query_cnt++; + + /* Add query interval timer. */ + rd_kafka_enq_once_add_source(rko->rko_u.leaders.eonce, + "query timer"); + rd_kafka_timer_start_oneshot( + &rk->rk_timers, &rko->rko_u.leaders.query_tmr, rd_true, + 3 * 1000 * 1000 /* 3s */, + rd_kafka_partition_leader_query_eonce_timer_cb, + rko->rko_u.leaders.eonce); + + /* Request metadata refresh */ + rd_kafka_metadata_refresh_topics( + rk, NULL, &query_topics, rd_true /*force*/, + rd_false /*!allow_auto_create*/, rd_false /*!cgrp_update*/, + "query partition leaders"); + } + + rd_list_destroy(leaders); + rd_list_destroy(&query_topics); + + /* Wait for next eonce trigger */ + return RD_KAFKA_OP_RES_KEEP; /* rko is still used */ + +reply: + /* Decommission worker state and reply to caller */ + + if (rd_kafka_timer_stop(&rk->rk_timers, &rko->rko_u.leaders.query_tmr, + RD_DO_LOCK)) + rd_kafka_enq_once_del_source(rko->rko_u.leaders.eonce, + "query timer"); + if (rd_kafka_timer_stop(&rk->rk_timers, &rko->rko_u.leaders.timeout_tmr, + RD_DO_LOCK)) + rd_kafka_enq_once_del_source(rko->rko_u.leaders.eonce, + "timeout timer"); + + if (rko->rko_u.leaders.eonce) { + rd_kafka_enq_once_disable(rko->rko_u.leaders.eonce); + rko->rko_u.leaders.eonce = NULL; + } + + /* No leaders found, set a request-level error */ + if (leaders && rd_list_cnt(leaders) == 0) { + if (!rko->rko_err) + rko->rko_err = RD_KAFKA_RESP_ERR__NOENT; + rd_list_destroy(leaders); + leaders = NULL; + } + + /* Create and enqueue reply rko */ + if (rko->rko_u.leaders.replyq.q) { + reply = rd_kafka_op_new_cb(rk, RD_KAFKA_OP_LEADERS, + rko->rko_u.leaders.cb); + rd_kafka_op_get_reply_version(reply, rko); + reply->rko_err = rko->rko_err; + reply->rko_u.leaders.partitions = + rko->rko_u.leaders.partitions; /* Transfer ownership for + * partition list that + * now contains + * per-partition errors*/ + rko->rko_u.leaders.partitions = NULL; + reply->rko_u.leaders.leaders = leaders; /* Possibly NULL */ + reply->rko_u.leaders.opaque = rko->rko_u.leaders.opaque; + + rd_kafka_replyq_enq(&rko->rko_u.leaders.replyq, reply, 0); + } + + return RD_KAFKA_OP_RES_HANDLED; +} + + +static rd_kafka_op_res_t +rd_kafka_topic_partition_list_query_leaders_async_worker_op_cb( + rd_kafka_t *rk, + rd_kafka_q_t *rkq, + rd_kafka_op_t *rko) { + return rd_kafka_topic_partition_list_query_leaders_async_worker(rko); +} + +/** + * @brief Async variant of rd_kafka_topic_partition_list_query_leaders(). + * + * The reply rko op will contain: + * - .leaders which is a list of leaders and their partitions, this may be + * NULL for overall errors (such as no leaders are found), or a + * partial or complete list of leaders. + * - .partitions which is a copy of the input list of partitions with the + * .err field set to the outcome of the leader query, typically ERR_NO_ERROR + * or ERR_UNKNOWN_TOPIC_OR_PART. + * + * @locks_acquired rd_kafka_*lock() + * + * @remark rd_kafka_*lock() MUST NOT be held + */ +void rd_kafka_topic_partition_list_query_leaders_async( + rd_kafka_t *rk, + const rd_kafka_topic_partition_list_t *rktparlist, + int timeout_ms, + rd_kafka_replyq_t replyq, + rd_kafka_op_cb_t *cb, + void *opaque) { + rd_kafka_op_t *rko; + + rd_assert(rktparlist && rktparlist->cnt > 0); + rd_assert(replyq.q); + + rko = rd_kafka_op_new_cb( + rk, RD_KAFKA_OP_LEADERS, + rd_kafka_topic_partition_list_query_leaders_async_worker_op_cb); + rko->rko_u.leaders.replyq = replyq; + rko->rko_u.leaders.partitions = + rd_kafka_topic_partition_list_copy(rktparlist); + rko->rko_u.leaders.ts_timeout = rd_timeout_init(timeout_ms); + rko->rko_u.leaders.cb = cb; + rko->rko_u.leaders.opaque = opaque; + + /* Create an eonce to be triggered either by metadata cache update + * (from refresh_topics()), query interval, or timeout. */ + rko->rko_u.leaders.eonce = + rd_kafka_enq_once_new(rko, RD_KAFKA_REPLYQ(rk->rk_ops, 0)); + + rd_kafka_enq_once_add_source(rko->rko_u.leaders.eonce, "timeout timer"); + rd_kafka_timer_start_oneshot( + &rk->rk_timers, &rko->rko_u.leaders.timeout_tmr, rd_true, + rd_timeout_remains_us(rko->rko_u.leaders.ts_timeout), + rd_kafka_partition_leader_query_eonce_timeout_cb, + rko->rko_u.leaders.eonce); + + if (rd_kafka_topic_partition_list_query_leaders_async_worker(rko) == + RD_KAFKA_OP_RES_HANDLED) + rd_kafka_op_destroy(rko); /* Reply queue already disabled */ +} + + +/** + * @brief Get leaders for all partitions in \p rktparlist, querying metadata + * if needed. + * + * @param leaders is a pre-initialized (empty) list which will be populated + * with the leader brokers and their partitions + * (struct rd_kafka_partition_leader *) + * + * @remark Will not trigger topic auto creation (unless configured). + * + * @returns an error code on error. + * + * @locks rd_kafka_*lock() MUST NOT be held + */ +rd_kafka_resp_err_t rd_kafka_topic_partition_list_query_leaders( + rd_kafka_t *rk, + rd_kafka_topic_partition_list_t *rktparlist, + rd_list_t *leaders, + int timeout_ms) { + rd_ts_t ts_end = rd_timeout_init(timeout_ms); + rd_ts_t ts_query = 0; + rd_ts_t now; + int query_cnt = 0; + int i = 0; + + /* Get all the partition leaders, try multiple times: + * if there are no leaders after the first run fire off a leader + * query and wait for broker state update before trying again, + * keep trying and re-querying at increasing intervals until + * success or timeout. */ + do { + rd_list_t query_topics; + int query_intvl; + + rd_list_init(&query_topics, rktparlist->cnt, rd_free); + + rd_kafka_topic_partition_list_get_leaders( + rk, rktparlist, leaders, &query_topics, + /* Add unknown topics to query_topics only on the + * first query, after that we consider them + * permanently non-existent */ + query_cnt == 0, NULL); + + if (rd_list_empty(&query_topics)) { + /* No remaining topics to query: leader-list complete.*/ + rd_list_destroy(&query_topics); + + /* No leader(s) for partitions means all partitions + * are unknown. */ + if (rd_list_empty(leaders)) + return RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + + return RD_KAFKA_RESP_ERR_NO_ERROR; + } + + now = rd_clock(); + + /* + * Missing leader for some partitions + */ + query_intvl = (i + 1) * 100; /* add 100ms per iteration */ + if (query_intvl > 2 * 1000) + query_intvl = 2 * 1000; /* Cap to 2s */ + + if (now >= ts_query + (query_intvl * 1000)) { + /* Query metadata for missing leaders, + * possibly creating the topic. */ + rd_kafka_metadata_refresh_topics( + rk, NULL, &query_topics, rd_true /*force*/, + rd_false /*!allow_auto_create*/, + rd_false /*!cgrp_update*/, + "query partition leaders"); + ts_query = now; + query_cnt++; + + } else { + /* Wait for broker ids to be updated from + * metadata refresh above. */ + int wait_ms = + rd_timeout_remains_limit(ts_end, query_intvl); + rd_kafka_metadata_cache_wait_change(rk, wait_ms); + } + + rd_list_destroy(&query_topics); + + i++; + } while (ts_end == RD_POLL_INFINITE || + now < ts_end); /* now is deliberately outdated here + * since wait_change() will block. + * This gives us one more chance to spin thru*/ + + if (rd_atomic32_get(&rk->rk_broker_up_cnt) == 0) + return RD_KAFKA_RESP_ERR__ALL_BROKERS_DOWN; + + return RD_KAFKA_RESP_ERR__TIMED_OUT; +} + + +/** + * @brief Populate \p rkts with the rd_kafka_topic_t objects for the + * partitions in. Duplicates are suppressed. + * + * @returns the number of topics added. + */ +int rd_kafka_topic_partition_list_get_topics( + rd_kafka_t *rk, + rd_kafka_topic_partition_list_t *rktparlist, + rd_list_t *rkts) { + int cnt = 0; + + int i; + for (i = 0; i < rktparlist->cnt; i++) { + rd_kafka_topic_partition_t *rktpar = &rktparlist->elems[i]; + rd_kafka_toppar_t *rktp; + + rktp = + rd_kafka_topic_partition_get_toppar(rk, rktpar, rd_false); + if (!rktp) { + rktpar->err = RD_KAFKA_RESP_ERR__UNKNOWN_PARTITION; + continue; + } + + if (!rd_list_find(rkts, rktp->rktp_rkt, + rd_kafka_topic_cmp_rkt)) { + rd_list_add(rkts, rd_kafka_topic_keep(rktp->rktp_rkt)); + cnt++; + } + + rd_kafka_toppar_destroy(rktp); + } + + return cnt; +} + + +/** + * @brief Populate \p topics with the strdupped topic names in \p rktparlist. + * Duplicates are suppressed. + * + * @param include_regex: include regex topics + * + * @returns the number of topics added. + */ +int rd_kafka_topic_partition_list_get_topic_names( + const rd_kafka_topic_partition_list_t *rktparlist, + rd_list_t *topics, + int include_regex) { + int cnt = 0; + int i; + + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + + if (!include_regex && *rktpar->topic == '^') + continue; + + if (!rd_list_find(topics, rktpar->topic, (void *)strcmp)) { + rd_list_add(topics, rd_strdup(rktpar->topic)); + cnt++; + } + } + + return cnt; +} + + +/** + * @brief Create a copy of \p rktparlist only containing the partitions + * matched by \p match function. + * + * \p match shall return 1 for match, else 0. + * + * @returns a new list + */ +rd_kafka_topic_partition_list_t *rd_kafka_topic_partition_list_match( + const rd_kafka_topic_partition_list_t *rktparlist, + int (*match)(const void *elem, const void *opaque), + void *opaque) { + rd_kafka_topic_partition_list_t *newlist; + int i; + + newlist = rd_kafka_topic_partition_list_new(0); + + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + + if (!match(rktpar, opaque)) + continue; + + rd_kafka_topic_partition_list_add_copy(newlist, rktpar); + } + + return newlist; +} + +void rd_kafka_topic_partition_list_log( + rd_kafka_t *rk, + const char *fac, + int dbg, + const rd_kafka_topic_partition_list_t *rktparlist) { + int i; + + rd_kafka_dbg(rk, NONE | dbg, fac, + "List with %d partition(s):", rktparlist->cnt); + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + rd_kafka_dbg(rk, NONE | dbg, fac, + " %s [%" PRId32 "] offset %s%s%s", rktpar->topic, + rktpar->partition, + rd_kafka_offset2str(rktpar->offset), + rktpar->err ? ": error: " : "", + rktpar->err ? rd_kafka_err2str(rktpar->err) : ""); + } +} + +/** + * @returns a comma-separated list of partitions. + */ +const char *rd_kafka_topic_partition_list_str( + const rd_kafka_topic_partition_list_t *rktparlist, + char *dest, + size_t dest_size, + int fmt_flags) { + int i; + size_t of = 0; + + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + char errstr[128]; + char offsetstr[32]; + int r; + + if (!rktpar->err && (fmt_flags & RD_KAFKA_FMT_F_ONLY_ERR)) + continue; + + if (rktpar->err && !(fmt_flags & RD_KAFKA_FMT_F_NO_ERR)) + rd_snprintf(errstr, sizeof(errstr), "(%s)", + rd_kafka_err2str(rktpar->err)); + else + errstr[0] = '\0'; + + if (rktpar->offset != RD_KAFKA_OFFSET_INVALID) + rd_snprintf(offsetstr, sizeof(offsetstr), "@%" PRId64, + rktpar->offset); + else + offsetstr[0] = '\0'; + + r = rd_snprintf(&dest[of], dest_size - of, + "%s" + "%s[%" PRId32 + "]" + "%s" + "%s", + of == 0 ? "" : ", ", rktpar->topic, + rktpar->partition, offsetstr, errstr); + + if ((size_t)r >= dest_size - of) { + rd_snprintf(&dest[dest_size - 4], 4, "..."); + break; + } + + of += r; + } + + return dest; +} + + + +/** + * @brief Update \p dst with info from \p src. + * + * Fields updated: + * - metadata + * - metadata_size + * - offset + * - offset leader epoch + * - err + * + * Will only update partitions that are in both dst and src, other partitions + * will remain unchanged. + */ +void rd_kafka_topic_partition_list_update( + rd_kafka_topic_partition_list_t *dst, + const rd_kafka_topic_partition_list_t *src) { + int i; + + for (i = 0; i < dst->cnt; i++) { + rd_kafka_topic_partition_t *d = &dst->elems[i]; + rd_kafka_topic_partition_t *s; + rd_kafka_topic_partition_private_t *s_priv, *d_priv; + + if (!(s = rd_kafka_topic_partition_list_find( + (rd_kafka_topic_partition_list_t *)src, d->topic, + d->partition))) + continue; + + d->offset = s->offset; + d->err = s->err; + if (d->metadata) { + rd_free(d->metadata); + d->metadata = NULL; + d->metadata_size = 0; + } + if (s->metadata_size > 0) { + d->metadata = rd_malloc(s->metadata_size); + d->metadata_size = s->metadata_size; + memcpy((void *)d->metadata, s->metadata, + s->metadata_size); + } + + s_priv = rd_kafka_topic_partition_get_private(s); + d_priv = rd_kafka_topic_partition_get_private(d); + d_priv->leader_epoch = s_priv->leader_epoch; + } +} + + +/** + * @returns the sum of \p cb called for each element. + */ +size_t rd_kafka_topic_partition_list_sum( + const rd_kafka_topic_partition_list_t *rktparlist, + size_t (*cb)(const rd_kafka_topic_partition_t *rktpar, void *opaque), + void *opaque) { + int i; + size_t sum = 0; + + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + sum += cb(rktpar, opaque); + } + + return sum; +} + + +/** + * @returns rd_true if there are duplicate topic/partitions in the list, + * rd_false if not. + * + * @remarks sorts the elements of the list. + */ +rd_bool_t rd_kafka_topic_partition_list_has_duplicates( + rd_kafka_topic_partition_list_t *rktparlist, + rd_bool_t ignore_partition) { + + int i; + + if (rktparlist->cnt <= 1) + return rd_false; + + rd_kafka_topic_partition_list_sort_by_topic(rktparlist); + + for (i = 1; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *p1 = + &rktparlist->elems[i - 1]; + const rd_kafka_topic_partition_t *p2 = &rktparlist->elems[i]; + + if (((p1->partition == p2->partition) || ignore_partition) && + !strcmp(p1->topic, p2->topic)) { + return rd_true; + } + } + + return rd_false; +} + + +/** + * @brief Set \c .err field \p err on all partitions in list. + */ +void rd_kafka_topic_partition_list_set_err( + rd_kafka_topic_partition_list_t *rktparlist, + rd_kafka_resp_err_t err) { + int i; + + for (i = 0; i < rktparlist->cnt; i++) + rktparlist->elems[i].err = err; +} + +/** + * @brief Get the first set error in the partition list. + */ +rd_kafka_resp_err_t rd_kafka_topic_partition_list_get_err( + const rd_kafka_topic_partition_list_t *rktparlist) { + int i; + + for (i = 0; i < rktparlist->cnt; i++) + if (rktparlist->elems[i].err) + return rktparlist->elems[i].err; + + return RD_KAFKA_RESP_ERR_NO_ERROR; +} + + +/** + * @returns the number of wildcard/regex topics + */ +int rd_kafka_topic_partition_list_regex_cnt( + const rd_kafka_topic_partition_list_t *rktparlist) { + int i; + int cnt = 0; + + for (i = 0; i < rktparlist->cnt; i++) { + const rd_kafka_topic_partition_t *rktpar = + &rktparlist->elems[i]; + cnt += *rktpar->topic == '^'; + } + return cnt; +} + + +/** + * @brief Reset base sequence for this toppar. + * + * See rd_kafka_toppar_pid_change() below. + * + * @warning Toppar must be completely drained. + * + * @locality toppar handler thread + * @locks toppar_lock MUST be held. + */ +static void rd_kafka_toppar_reset_base_msgid(rd_kafka_toppar_t *rktp, + uint64_t new_base_msgid) { + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC | RD_KAFKA_DBG_EOS, "RESETSEQ", + "%.*s [%" PRId32 + "] " + "resetting epoch base seq from %" PRIu64 " to %" PRIu64, + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), rktp->rktp_partition, + rktp->rktp_eos.epoch_base_msgid, new_base_msgid); + + rktp->rktp_eos.next_ack_seq = 0; + rktp->rktp_eos.next_err_seq = 0; + rktp->rktp_eos.epoch_base_msgid = new_base_msgid; +} + + +/** + * @brief Update/change the Producer ID for this toppar. + * + * Must only be called when pid is different from the current toppar pid. + * + * The epoch base sequence will be set to \p base_msgid, which must be the + * first message in the partition + * queue. However, if there are outstanding messages in-flight to the broker + * we will need to wait for these ProduceRequests to finish (most likely + * with failure) and have their messages re-enqueued to maintain original order. + * In this case the pid will not be updated and this function should be + * called again when there are no outstanding messages. + * + * @remark This function must only be called when rktp_xmitq is non-empty. + * + * @returns 1 if a new pid was set, else 0. + * + * @locality toppar handler thread + * @locks none + */ +int rd_kafka_toppar_pid_change(rd_kafka_toppar_t *rktp, + rd_kafka_pid_t pid, + uint64_t base_msgid) { + int inflight = rd_atomic32_get(&rktp->rktp_msgs_inflight); + + if (unlikely(inflight > 0)) { + rd_kafka_dbg( + rktp->rktp_rkt->rkt_rk, TOPIC | RD_KAFKA_DBG_EOS, "NEWPID", + "%.*s [%" PRId32 + "] will not change %s -> %s yet: " + "%d message(s) still in-flight from current " + "epoch", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_pid2str(rktp->rktp_eos.pid), + rd_kafka_pid2str(pid), inflight); + return 0; + } + + rd_assert(base_msgid != 0 && + *"BUG: pid_change() must only be called with " + "non-empty xmitq"); + + rd_kafka_toppar_lock(rktp); + rd_kafka_dbg(rktp->rktp_rkt->rkt_rk, TOPIC | RD_KAFKA_DBG_EOS, "NEWPID", + "%.*s [%" PRId32 + "] changed %s -> %s " + "with base MsgId %" PRIu64, + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, rd_kafka_pid2str(rktp->rktp_eos.pid), + rd_kafka_pid2str(pid), base_msgid); + + rktp->rktp_eos.pid = pid; + rd_kafka_toppar_reset_base_msgid(rktp, base_msgid); + + rd_kafka_toppar_unlock(rktp); + + return 1; +} + + +/** + * @brief Purge messages in partition queues. + * Delivery reports will be enqueued for all purged messages, the error + * code is set to RD_KAFKA_RESP_ERR__PURGE_QUEUE. + * + * @param include_xmit_msgq If executing from the rktp's current broker handler + * thread, also include the xmit message queue. + * + * @warning Only to be used with the producer. + * + * @returns the number of messages purged + * + * @locality any thread. + * @locks_acquired rd_kafka_toppar_lock() + * @locks_required none + */ +int rd_kafka_toppar_purge_queues(rd_kafka_toppar_t *rktp, + int purge_flags, + rd_bool_t include_xmit_msgq) { + rd_kafka_t *rk = rktp->rktp_rkt->rkt_rk; + rd_kafka_msgq_t rkmq = RD_KAFKA_MSGQ_INITIALIZER(rkmq); + int cnt; + + rd_assert(rk->rk_type == RD_KAFKA_PRODUCER); + + rd_kafka_dbg(rk, TOPIC, "PURGE", + "%s [%" PRId32 + "]: purging queues " + "(purge_flags 0x%x, %s xmit_msgq)", + rktp->rktp_rkt->rkt_topic->str, rktp->rktp_partition, + purge_flags, include_xmit_msgq ? "include" : "exclude"); + + if (!(purge_flags & RD_KAFKA_PURGE_F_QUEUE)) + return 0; + + if (include_xmit_msgq) { + /* xmit_msgq is owned by the toppar handler thread + * (broker thread) and requires no locking. */ + rd_assert(rktp->rktp_broker); + rd_assert(thrd_is_current(rktp->rktp_broker->rkb_thread)); + rd_kafka_msgq_concat(&rkmq, &rktp->rktp_xmit_msgq); + } + + rd_kafka_toppar_lock(rktp); + rd_kafka_msgq_concat(&rkmq, &rktp->rktp_msgq); + cnt = rd_kafka_msgq_len(&rkmq); + + if (cnt > 0 && purge_flags & RD_KAFKA_PURGE_F_ABORT_TXN) { + /* All messages in-queue are purged + * on abort_transaction(). Since these messages + * will not be produced (retried) we need to adjust the + * idempotence epoch's base msgid to skip the messages. */ + rktp->rktp_eos.epoch_base_msgid += cnt; + rd_kafka_dbg(rk, TOPIC | RD_KAFKA_DBG_EOS, "ADVBASE", + "%.*s [%" PRId32 + "] " + "advancing epoch base msgid to %" PRIu64 + " due to %d message(s) in aborted transaction", + RD_KAFKAP_STR_PR(rktp->rktp_rkt->rkt_topic), + rktp->rktp_partition, + rktp->rktp_eos.epoch_base_msgid, cnt); + } + rd_kafka_toppar_unlock(rktp); + + rd_kafka_dr_msgq(rktp->rktp_rkt, &rkmq, RD_KAFKA_RESP_ERR__PURGE_QUEUE); + + return cnt; +} + + +/** + * @brief Purge queues for the unassigned toppars of all known topics. + * + * @locality application thread + * @locks none + */ +void rd_kafka_purge_ua_toppar_queues(rd_kafka_t *rk) { + rd_kafka_topic_t *rkt; + int msg_cnt = 0, part_cnt = 0; + + rd_kafka_rdlock(rk); + TAILQ_FOREACH(rkt, &rk->rk_topics, rkt_link) { + rd_kafka_toppar_t *rktp; + int r; + + rd_kafka_topic_rdlock(rkt); + rktp = rkt->rkt_ua; + if (rktp) + rd_kafka_toppar_keep(rktp); + rd_kafka_topic_rdunlock(rkt); + + if (unlikely(!rktp)) + continue; + + + rd_kafka_toppar_lock(rktp); + + r = rd_kafka_msgq_len(&rktp->rktp_msgq); + rd_kafka_dr_msgq(rkt, &rktp->rktp_msgq, + RD_KAFKA_RESP_ERR__PURGE_QUEUE); + rd_kafka_toppar_unlock(rktp); + rd_kafka_toppar_destroy(rktp); + + if (r > 0) { + msg_cnt += r; + part_cnt++; + } + } + rd_kafka_rdunlock(rk); + + rd_kafka_dbg(rk, QUEUE | RD_KAFKA_DBG_TOPIC, "PURGEQ", + "Purged %i message(s) from %d UA-partition(s)", msg_cnt, + part_cnt); +} + + +void rd_kafka_partition_leader_destroy_free(void *ptr) { + struct rd_kafka_partition_leader *leader = ptr; + rd_kafka_partition_leader_destroy(leader); +} + + +const char *rd_kafka_fetch_pos2str(const rd_kafka_fetch_pos_t fetchpos) { + static RD_TLS char ret[2][64]; + static int idx; + + idx = (idx + 1) % 2; + + rd_snprintf( + ret[idx], sizeof(ret[idx]), "offset %s (leader epoch %" PRId32 ")", + rd_kafka_offset2str(fetchpos.offset), fetchpos.leader_epoch); + + return ret[idx]; +} |