--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "rgw_rados.h"
+#include "rgw_bucket.h"
+#include "rgw_reshard.h"
+#include "cls/rgw/cls_rgw_client.h"
+#include "cls/lock/cls_lock_client.h"
+#include "common/errno.h"
+#include "common/ceph_json.h"
+
+#include "common/dout.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rgw
+
+const string reshard_oid_prefix = "reshard.";
+const string reshard_lock_name = "reshard_process";
+const string bucket_instance_lock_name = "bucket_instance_lock";
+
+using namespace std;
+
+#define RESHARD_SHARD_WINDOW 64
+#define RESHARD_MAX_AIO 128
+
+class BucketReshardShard {
+ RGWRados *store;
+ const RGWBucketInfo& bucket_info;
+ int num_shard;
+ RGWRados::BucketShard bs;
+ vector<rgw_cls_bi_entry> entries;
+ map<uint8_t, rgw_bucket_category_stats> stats;
+ deque<librados::AioCompletion *>& aio_completions;
+
+ int wait_next_completion() {
+ librados::AioCompletion *c = aio_completions.front();
+ aio_completions.pop_front();
+
+ c->wait_for_safe();
+
+ int ret = c->get_return_value();
+ c->release();
+
+ if (ret < 0) {
+ derr << "ERROR: reshard rados operation failed: " << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+
+ return 0;
+ }
+
+ int get_completion(librados::AioCompletion **c) {
+ if (aio_completions.size() >= RESHARD_MAX_AIO) {
+ int ret = wait_next_completion();
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ *c = librados::Rados::aio_create_completion(nullptr, nullptr, nullptr);
+ aio_completions.push_back(*c);
+
+ return 0;
+ }
+
+public:
+ BucketReshardShard(RGWRados *_store, const RGWBucketInfo& _bucket_info,
+ int _num_shard,
+ deque<librados::AioCompletion *>& _completions) : store(_store), bucket_info(_bucket_info), bs(store),
+ aio_completions(_completions) {
+ num_shard = (bucket_info.num_shards > 0 ? _num_shard : -1);
+ bs.init(bucket_info.bucket, num_shard);
+ }
+
+ int get_num_shard() {
+ return num_shard;
+ }
+
+ int add_entry(rgw_cls_bi_entry& entry, bool account, uint8_t category,
+ const rgw_bucket_category_stats& entry_stats) {
+ entries.push_back(entry);
+ if (account) {
+ rgw_bucket_category_stats& target = stats[category];
+ target.num_entries += entry_stats.num_entries;
+ target.total_size += entry_stats.total_size;
+ target.total_size_rounded += entry_stats.total_size_rounded;
+ }
+ if (entries.size() >= RESHARD_SHARD_WINDOW) {
+ int ret = flush();
+ if (ret < 0) {
+ return ret;
+ }
+ }
+ return 0;
+ }
+ int flush() {
+ if (entries.size() == 0) {
+ return 0;
+ }
+
+ librados::ObjectWriteOperation op;
+ for (auto& entry : entries) {
+ store->bi_put(op, bs, entry);
+ }
+ cls_rgw_bucket_update_stats(op, false, stats);
+
+ librados::AioCompletion *c;
+ int ret = get_completion(&c);
+ if (ret < 0) {
+ return ret;
+ }
+ ret = bs.index_ctx.aio_operate(bs.bucket_obj, c, &op);
+ if (ret < 0) {
+ derr << "ERROR: failed to store entries in target bucket shard (bs=" << bs.bucket << "/" << bs.shard_id << ") error=" << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+ entries.clear();
+ stats.clear();
+ return 0;
+ }
+
+ int wait_all_aio() {
+ int ret = 0;
+ while (!aio_completions.empty()) {
+ int r = wait_next_completion();
+ if (r < 0) {
+ ret = r;
+ }
+ }
+ return ret;
+ }
+};
+
+class BucketReshardManager {
+ RGWRados *store;
+ const RGWBucketInfo& target_bucket_info;
+ deque<librados::AioCompletion *> completions;
+ int num_target_shards;
+ vector<BucketReshardShard *> target_shards;
+
+public:
+ BucketReshardManager(RGWRados *_store, const RGWBucketInfo& _target_bucket_info, int _num_target_shards) : store(_store), target_bucket_info(_target_bucket_info),
+ num_target_shards(_num_target_shards) {
+ target_shards.resize(num_target_shards);
+ for (int i = 0; i < num_target_shards; ++i) {
+ target_shards[i] = new BucketReshardShard(store, target_bucket_info, i, completions);
+ }
+ }
+
+ ~BucketReshardManager() {
+ for (auto& shard : target_shards) {
+ int ret = shard->wait_all_aio();
+ if (ret < 0) {
+ ldout(store->ctx(), 20) << __func__ << ": shard->wait_all_aio() returned ret=" << ret << dendl;
+ }
+ }
+ }
+
+ int add_entry(int shard_index,
+ rgw_cls_bi_entry& entry, bool account, uint8_t category,
+ const rgw_bucket_category_stats& entry_stats) {
+ int ret = target_shards[shard_index]->add_entry(entry, account, category, entry_stats);
+ if (ret < 0) {
+ derr << "ERROR: target_shards.add_entry(" << entry.idx << ") returned error: " << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+ return 0;
+ }
+
+ int finish() {
+ int ret = 0;
+ for (auto& shard : target_shards) {
+ int r = shard->flush();
+ if (r < 0) {
+ derr << "ERROR: target_shards[" << shard->get_num_shard() << "].flush() returned error: " << cpp_strerror(-r) << dendl;
+ ret = r;
+ }
+ }
+ for (auto& shard : target_shards) {
+ int r = shard->wait_all_aio();
+ if (r < 0) {
+ derr << "ERROR: target_shards[" << shard->get_num_shard() << "].wait_all_aio() returned error: " << cpp_strerror(-r) << dendl;
+ ret = r;
+ }
+ delete shard;
+ }
+ target_shards.clear();
+ return ret;
+ }
+};
+
+RGWBucketReshard::RGWBucketReshard(RGWRados *_store, const RGWBucketInfo& _bucket_info, const map<string, bufferlist>& _bucket_attrs) :
+ store(_store), bucket_info(_bucket_info), bucket_attrs(_bucket_attrs),
+ reshard_lock(reshard_lock_name) {
+ const rgw_bucket& b = bucket_info.bucket;
+ reshard_oid = b.tenant + (b.tenant.empty() ? "" : ":") + b.name + ":" + b.bucket_id;
+
+ utime_t lock_duration(store->ctx()->_conf->rgw_reshard_bucket_lock_duration, 0);
+#define COOKIE_LEN 16
+ char cookie_buf[COOKIE_LEN + 1];
+ gen_rand_alphanumeric(store->ctx(), cookie_buf, sizeof(cookie_buf) - 1);
+ cookie_buf[COOKIE_LEN] = '\0';
+
+ reshard_lock.set_cookie(cookie_buf);
+ reshard_lock.set_duration(lock_duration);
+}
+
+int RGWBucketReshard::lock_bucket()
+{
+ int ret = reshard_lock.lock_exclusive(&store->reshard_pool_ctx, reshard_oid);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "RGWReshard::add failed to acquire lock on " << reshard_oid << " ret=" << ret << dendl;
+ return ret;
+ }
+ return 0;
+}
+
+void RGWBucketReshard::unlock_bucket()
+{
+ int ret = reshard_lock.unlock(&store->reshard_pool_ctx, reshard_oid);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "WARNING: RGWReshard::add failed to drop lock on " << reshard_oid << " ret=" << ret << dendl;
+ }
+}
+
+int RGWBucketReshard::set_resharding_status(const string& new_instance_id, int32_t num_shards, cls_rgw_reshard_status status)
+{
+ if (new_instance_id.empty()) {
+ ldout(store->ctx(), 0) << __func__ << " missing new bucket instance id" << dendl;
+ return -EINVAL;
+ }
+
+ cls_rgw_bucket_instance_entry instance_entry;
+ instance_entry.set_status(new_instance_id, num_shards, status);
+
+ int ret = store->bucket_set_reshard(bucket_info, instance_entry);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "RGWReshard::" << __func__ << " ERROR: error setting bucket resharding flag on bucket index: "
+ << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+ return 0;
+}
+
+int RGWBucketReshard::clear_resharding()
+{
+ cls_rgw_bucket_instance_entry instance_entry;
+
+ int ret = store->bucket_set_reshard(bucket_info, instance_entry);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "RGWReshard::" << __func__ << " ERROR: error setting bucket resharding flag on bucket index: "
+ << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+ return 0;
+}
+
+static int create_new_bucket_instance(RGWRados *store,
+ int new_num_shards,
+ const RGWBucketInfo& bucket_info,
+ map<string, bufferlist>& attrs,
+ RGWBucketInfo& new_bucket_info)
+{
+ new_bucket_info = bucket_info;
+
+ store->create_bucket_id(&new_bucket_info.bucket.bucket_id);
+ new_bucket_info.bucket.oid.clear();
+
+ new_bucket_info.num_shards = new_num_shards;
+ new_bucket_info.objv_tracker.clear();
+
+ new_bucket_info.new_bucket_instance_id.clear();
+ new_bucket_info.reshard_status = 0;
+
+ int ret = store->init_bucket_index(new_bucket_info, new_bucket_info.num_shards);
+ if (ret < 0) {
+ cerr << "ERROR: failed to init new bucket indexes: " << cpp_strerror(-ret) << std::endl;
+ return -ret;
+ }
+
+ ret = store->put_bucket_instance_info(new_bucket_info, true, real_time(), &attrs);
+ if (ret < 0) {
+ cerr << "ERROR: failed to store new bucket instance info: " << cpp_strerror(-ret) << std::endl;
+ return -ret;
+ }
+
+ return 0;
+}
+
+int RGWBucketReshard::create_new_bucket_instance(int new_num_shards,
+ RGWBucketInfo& new_bucket_info)
+{
+ return ::create_new_bucket_instance(store, new_num_shards, bucket_info, bucket_attrs, new_bucket_info);
+}
+
+class BucketInfoReshardUpdate
+{
+ RGWRados *store;
+ RGWBucketInfo bucket_info;
+ std::map<string, bufferlist> bucket_attrs;
+
+ bool in_progress{false};
+
+ int set_status(cls_rgw_reshard_status s) {
+ bucket_info.reshard_status = s;
+ int ret = store->put_bucket_instance_info(bucket_info, false, real_time(), &bucket_attrs);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << "ERROR: failed to write bucket info, ret=" << ret << dendl;
+ return ret;
+ }
+ return 0;
+ }
+
+public:
+ BucketInfoReshardUpdate(RGWRados *_store, RGWBucketInfo& _bucket_info,
+ map<string, bufferlist>& _bucket_attrs, const string& new_bucket_id) : store(_store),
+ bucket_info(_bucket_info),
+ bucket_attrs(_bucket_attrs) {
+ bucket_info.new_bucket_instance_id = new_bucket_id;
+ }
+ ~BucketInfoReshardUpdate() {
+ if (in_progress) {
+ bucket_info.new_bucket_instance_id.clear();
+ set_status(CLS_RGW_RESHARD_NONE);
+ }
+ }
+
+ int start() {
+ int ret = set_status(CLS_RGW_RESHARD_IN_PROGRESS);
+ if (ret < 0) {
+ return ret;
+ }
+ in_progress = true;
+ return 0;
+ }
+
+ int complete() {
+ int ret = set_status(CLS_RGW_RESHARD_DONE);
+ if (ret < 0) {
+ return ret;
+ }
+ in_progress = false;
+ return 0;
+ }
+};
+
+int RGWBucketReshard::do_reshard(
+ int num_shards,
+ const RGWBucketInfo& new_bucket_info,
+ int max_entries,
+ bool verbose,
+ ostream *out,
+ Formatter *formatter)
+{
+ rgw_bucket& bucket = bucket_info.bucket;
+
+ int ret = 0;
+
+ if (out) {
+ (*out) << "*** NOTICE: operation will not remove old bucket index objects ***" << std::endl;
+ (*out) << "*** these will need to be removed manually ***" << std::endl;
+ (*out) << "tenant: " << bucket_info.bucket.tenant << std::endl;
+ (*out) << "bucket name: " << bucket_info.bucket.name << std::endl;
+ (*out) << "old bucket instance id: " << bucket_info.bucket.bucket_id << std::endl;
+ (*out) << "new bucket instance id: " << new_bucket_info.bucket.bucket_id << std::endl;
+ }
+
+ /* update bucket info -- in progress*/
+ list<rgw_cls_bi_entry> entries;
+
+ if (max_entries < 0) {
+ ldout(store->ctx(), 0) << __func__ << ": can't reshard, negative max_entries" << dendl;
+ return -EINVAL;
+ }
+
+ BucketInfoReshardUpdate bucket_info_updater(store, bucket_info, bucket_attrs, new_bucket_info.bucket.bucket_id);
+
+ ret = bucket_info_updater.start();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << __func__ << ": failed to update bucket info ret=" << ret << dendl;
+ return ret;
+ }
+
+ int num_target_shards = (new_bucket_info.num_shards > 0 ? new_bucket_info.num_shards : 1);
+
+ BucketReshardManager target_shards_mgr(store, new_bucket_info, num_target_shards);
+
+ verbose = verbose && (formatter != nullptr);
+
+ if (verbose) {
+ formatter->open_array_section("entries");
+ }
+
+ uint64_t total_entries = 0;
+
+ if (!verbose) {
+ cout << "total entries:";
+ }
+
+ int num_source_shards = (bucket_info.num_shards > 0 ? bucket_info.num_shards : 1);
+ string marker;
+ for (int i = 0; i < num_source_shards; ++i) {
+ bool is_truncated = true;
+ marker.clear();
+ while (is_truncated) {
+ entries.clear();
+ ret = store->bi_list(bucket, i, string(), marker, max_entries, &entries, &is_truncated);
+ if (ret < 0 && ret != -ENOENT) {
+ derr << "ERROR: bi_list(): " << cpp_strerror(-ret) << dendl;
+ return -ret;
+ }
+
+ list<rgw_cls_bi_entry>::iterator iter;
+ for (iter = entries.begin(); iter != entries.end(); ++iter) {
+ rgw_cls_bi_entry& entry = *iter;
+ if (verbose) {
+ formatter->open_object_section("entry");
+
+ encode_json("shard_id", i, formatter);
+ encode_json("num_entry", total_entries, formatter);
+ encode_json("entry", entry, formatter);
+ }
+ total_entries++;
+
+ marker = entry.idx;
+
+ int target_shard_id;
+ cls_rgw_obj_key cls_key;
+ uint8_t category;
+ rgw_bucket_category_stats stats;
+ bool account = entry.get_info(&cls_key, &category, &stats);
+ rgw_obj_key key(cls_key);
+ rgw_obj obj(new_bucket_info.bucket, key);
+ int ret = store->get_target_shard_id(new_bucket_info, obj.get_hash_object(), &target_shard_id);
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: get_target_shard_id() returned ret=" << ret << dendl;
+ return ret;
+ }
+
+ int shard_index = (target_shard_id > 0 ? target_shard_id : 0);
+
+ ret = target_shards_mgr.add_entry(shard_index, entry, account, category, stats);
+ if (ret < 0) {
+ return ret;
+ }
+ if (verbose) {
+ formatter->close_section();
+ if (out) {
+ formatter->flush(*out);
+ formatter->flush(*out);
+ }
+ } else if (out && !(total_entries % 1000)) {
+ (*out) << " " << total_entries;
+ }
+ }
+ }
+ }
+ if (verbose) {
+ formatter->close_section();
+ if (out) {
+ formatter->flush(*out);
+ }
+ } else if (out) {
+ (*out) << " " << total_entries << std::endl;
+ }
+
+ ret = target_shards_mgr.finish();
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: failed to reshard" << dendl;
+ return EIO;
+ }
+
+ RGWBucketAdminOpState bucket_op;
+
+ bucket_op.set_bucket_name(new_bucket_info.bucket.name);
+ bucket_op.set_bucket_id(new_bucket_info.bucket.bucket_id);
+ bucket_op.set_user_id(new_bucket_info.owner);
+ string err;
+ int r = RGWBucketAdminOp::link(store, bucket_op, &err);
+ if (r < 0) {
+ lderr(store->ctx()) << "failed to link new bucket instance (bucket_id=" << new_bucket_info.bucket.bucket_id << ": " << err << "; " << cpp_strerror(-r) << ")" << dendl;
+ return -r;
+ }
+
+ ret = bucket_info_updater.complete();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << __func__ << ": failed to update bucket info ret=" << ret << dendl;
+ /* don't error out, reshard process succeeded */
+ }
+ return 0;
+}
+
+int RGWBucketReshard::get_status(list<cls_rgw_bucket_instance_entry> *status)
+{
+ librados::IoCtx index_ctx;
+ map<int, string> bucket_objs;
+
+ int r = store->open_bucket_index(bucket_info, index_ctx, bucket_objs);
+ if (r < 0) {
+ return r;
+ }
+
+ for (auto i : bucket_objs) {
+ cls_rgw_bucket_instance_entry entry;
+
+ int ret = cls_rgw_get_bucket_resharding(index_ctx, i.second, &entry);
+ if (ret < 0 && ret != -ENOENT) {
+ lderr(store->ctx()) << "ERROR: " << __func__ << ": cls_rgw_get_bucket_resharding() returned ret=" << ret << dendl;
+ return ret;
+ }
+
+ status->push_back(entry);
+ }
+
+ return 0;
+}
+
+int RGWBucketReshard::execute(int num_shards, int max_op_entries,
+ bool verbose, ostream *out, Formatter *formatter, RGWReshard* reshard_log)
+
+{
+ int ret = lock_bucket();
+ if (ret < 0) {
+ return ret;
+ }
+
+ RGWBucketInfo new_bucket_info;
+ ret = create_new_bucket_instance(num_shards, new_bucket_info);
+ if (ret < 0) {
+ unlock_bucket();
+ return ret;
+ }
+
+ if (reshard_log) {
+ ret = reshard_log->update(bucket_info, new_bucket_info);
+ if (ret < 0) {
+ unlock_bucket();
+ return ret;
+ }
+ }
+
+ ret = set_resharding_status(new_bucket_info.bucket.bucket_id, num_shards, CLS_RGW_RESHARD_IN_PROGRESS);
+ if (ret < 0) {
+ unlock_bucket();
+ return ret;
+ }
+
+ ret = do_reshard(num_shards,
+ new_bucket_info,
+ max_op_entries,
+ verbose, out, formatter);
+
+ if (ret < 0) {
+ unlock_bucket();
+ return ret;
+ }
+
+ ret = set_resharding_status(new_bucket_info.bucket.bucket_id, num_shards, CLS_RGW_RESHARD_DONE);
+ if (ret < 0) {
+ unlock_bucket();
+ return ret;
+ }
+
+ unlock_bucket();
+
+ return 0;
+}
+
+
+RGWReshard::RGWReshard(RGWRados* _store, bool _verbose, ostream *_out,
+ Formatter *_formatter) : store(_store), instance_lock(bucket_instance_lock_name),
+ verbose(_verbose), out(_out), formatter(_formatter)
+{
+ num_logshards = store->ctx()->_conf->rgw_reshard_num_logs;
+}
+
+string RGWReshard::get_logshard_key(const string& tenant, const string& bucket_name)
+{
+ return tenant + ":" + bucket_name;
+}
+
+#define MAX_RESHARD_LOGSHARDS_PRIME 7877
+
+void RGWReshard::get_bucket_logshard_oid(const string& tenant, const string& bucket_name, string *oid)
+{
+ string key = get_logshard_key(tenant, bucket_name);
+
+ uint32_t sid = ceph_str_hash_linux(key.c_str(), key.size());
+ uint32_t sid2 = sid ^ ((sid & 0xFF) << 24);
+ sid = sid2 % MAX_RESHARD_LOGSHARDS_PRIME % num_logshards;
+ int logshard = sid % num_logshards;
+
+ get_logshard_oid(logshard, oid);
+}
+
+int RGWReshard::add(cls_rgw_reshard_entry& entry)
+{
+ if (!store->can_reshard()) {
+ ldout(store->ctx(), 20) << __func__ << " Resharding is disabled" << dendl;
+ return 0;
+ }
+
+ string logshard_oid;
+
+ get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid);
+
+ librados::ObjectWriteOperation op;
+ cls_rgw_reshard_add(op, entry);
+
+ int ret = store->reshard_pool_ctx.operate(logshard_oid, &op);
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: failed to add entry to reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl;
+ return ret;
+ }
+ return 0;
+}
+
+int RGWReshard::update(const RGWBucketInfo& bucket_info, const RGWBucketInfo& new_bucket_info)
+{
+ cls_rgw_reshard_entry entry;
+ entry.bucket_name = bucket_info.bucket.name;
+ entry.bucket_id = bucket_info.bucket.bucket_id;
+
+ int ret = get(entry);
+ if (ret < 0) {
+ return ret;
+ }
+
+ entry.new_instance_id = new_bucket_info.bucket.name + ":" + new_bucket_info.bucket.bucket_id;
+
+ ret = add(entry);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << __func__ << ":Error in updating entry bucket " << entry.bucket_name << ": " <<
+ cpp_strerror(-ret) << dendl;
+ }
+
+ return ret;
+}
+
+
+int RGWReshard::list(int logshard_num, string& marker, uint32_t max, std::list<cls_rgw_reshard_entry>& entries, bool *is_truncated)
+{
+ string logshard_oid;
+
+ get_logshard_oid(logshard_num, &logshard_oid);
+
+ int ret = cls_rgw_reshard_list(store->reshard_pool_ctx, logshard_oid, marker, max, entries, is_truncated);
+
+ if (ret < 0) {
+ if (ret == -ENOENT) {
+ *is_truncated = false;
+ ret = 0;
+ }
+ lderr(store->ctx()) << "ERROR: failed to list reshard log entries, oid=" << logshard_oid << dendl;
+ if (ret == -EACCES) {
+ lderr(store->ctx()) << "access denied to pool " << store->get_zone_params().reshard_pool
+ << ". Fix the pool access permissions of your client" << dendl;
+ }
+ }
+
+ return ret;
+}
+
+int RGWReshard::get(cls_rgw_reshard_entry& entry)
+{
+ string logshard_oid;
+
+ get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid);
+
+ int ret = cls_rgw_reshard_get(store->reshard_pool_ctx, logshard_oid, entry);
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: failed to get entry from reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl;
+ return ret;
+ }
+
+ return 0;
+}
+
+int RGWReshard::remove(cls_rgw_reshard_entry& entry)
+{
+ string logshard_oid;
+
+ get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid);
+
+ librados::ObjectWriteOperation op;
+ cls_rgw_reshard_remove(op, entry);
+
+ int ret = store->reshard_pool_ctx.operate(logshard_oid, &op);
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: failed to remove entry from reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl;
+ return ret;
+ }
+
+ return ret;
+}
+
+int RGWReshard::clear_bucket_resharding(const string& bucket_instance_oid, cls_rgw_reshard_entry& entry)
+{
+ int ret = cls_rgw_clear_bucket_resharding(store->reshard_pool_ctx, bucket_instance_oid);
+ if (ret < 0) {
+ lderr(store->ctx()) << "ERROR: failed to clear bucket resharding, bucket_instance_oid=" << bucket_instance_oid << dendl;
+ return ret;
+ }
+
+ return 0;
+}
+
+const int num_retries = 10;
+const int default_reshard_sleep_duration = 5;
+
+int RGWReshardWait::do_wait()
+{
+ Mutex::Locker l(lock);
+
+ cond.WaitInterval(lock, utime_t(default_reshard_sleep_duration, 0));
+
+ if (going_down) {
+ return -ECANCELED;
+ }
+
+ return 0;
+}
+
+int RGWReshardWait::block_while_resharding(RGWRados::BucketShard *bs, string *new_bucket_id)
+{
+ int ret = 0;
+ cls_rgw_bucket_instance_entry entry;
+
+ for (int i=0; i < num_retries;i++) {
+ ret = cls_rgw_get_bucket_resharding(bs->index_ctx, bs->bucket_obj, &entry);
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << __func__ << " ERROR: failed to get bucket resharding :" <<
+ cpp_strerror(-ret)<< dendl;
+ return ret;
+ }
+ if (!entry.resharding_in_progress()) {
+ *new_bucket_id = entry.new_bucket_instance_id;
+ return 0;
+ }
+ ldout(store->ctx(), 20) << "NOTICE: reshard still in progress; " << (i < num_retries - 1 ? "retrying" : "too many retries") << dendl;
+ /* needed to unlock as clear resharding uses the same lock */
+
+ if (i == num_retries - 1) {
+ break;
+ }
+
+ ret = do_wait();
+ if (ret < 0) {
+ ldout(store->ctx(), 0) << __func__ << " ERROR: bucket is still resharding, please retry" << dendl;
+ return ret;
+ }
+ }
+ ldout(store->ctx(), 0) << __func__ << " ERROR: bucket is still resharding, please retry" << dendl;
+ return -ERR_BUSY_RESHARDING;
+}
+
+int RGWReshard::process_single_logshard(int logshard_num)
+{
+ string marker;
+ bool truncated = true;
+
+ CephContext *cct = store->ctx();
+ int max_entries = 1000;
+ int max_secs = 60;
+
+ rados::cls::lock::Lock l(reshard_lock_name);
+
+ utime_t time(max_secs, 0);
+ l.set_duration(time);
+
+ char cookie_buf[COOKIE_LEN + 1];
+ gen_rand_alphanumeric(store->ctx(), cookie_buf, sizeof(cookie_buf) - 1);
+ cookie_buf[COOKIE_LEN] = '\0';
+
+ l.set_cookie(cookie_buf);
+
+ string logshard_oid;
+ get_logshard_oid(logshard_num, &logshard_oid);
+
+ int ret = l.lock_exclusive(&store->reshard_pool_ctx, logshard_oid);
+ if (ret == -EBUSY) { /* already locked by another processor */
+ ldout(store->ctx(), 5) << __func__ << "(): failed to acquire lock on " << logshard_oid << dendl;
+ return ret;
+ }
+
+ utime_t lock_start_time = ceph_clock_now();
+
+ do {
+ std::list<cls_rgw_reshard_entry> entries;
+ ret = list(logshard_num, marker, max_entries, entries, &truncated);
+ if (ret < 0) {
+ ldout(cct, 10) << "cannot list all reshards in logshard oid=" << logshard_oid << dendl;
+ continue;
+ }
+
+ for(auto& entry: entries) {
+ if(entry.new_instance_id.empty()) {
+
+ ldout(store->ctx(), 20) << __func__ << " resharding " << entry.bucket_name << dendl;
+
+ RGWObjectCtx obj_ctx(store);
+ rgw_bucket bucket;
+ RGWBucketInfo bucket_info;
+ map<string, bufferlist> attrs;
+
+ ret = store->get_bucket_info(obj_ctx, entry.tenant, entry.bucket_name, bucket_info, nullptr,
+ &attrs);
+ if (ret < 0) {
+ ldout(cct, 0) << __func__ << ": Error in get_bucket_info: " << cpp_strerror(-ret) << dendl;
+ return -ret;
+ }
+
+ RGWBucketReshard br(store, bucket_info, attrs);
+
+ Formatter* formatter = new JSONFormatter(false);
+ auto formatter_ptr = std::unique_ptr<Formatter>(formatter);
+ ret = br.execute(entry.new_num_shards, max_entries, true,nullptr, formatter, this);
+ if (ret < 0) {
+ ldout (store->ctx(), 0) << __func__ << "ERROR in reshard_bucket " << entry.bucket_name << ":" <<
+ cpp_strerror(-ret)<< dendl;
+ return ret;
+ }
+
+ ldout (store->ctx(), 20) << " removing entry" << entry.bucket_name<< dendl;
+
+ ret = remove(entry);
+ if (ret < 0) {
+ ldout(cct, 0)<< __func__ << ":Error removing bucket " << entry.bucket_name << " for resharding queue: "
+ << cpp_strerror(-ret) << dendl;
+ return ret;
+ }
+ }
+ utime_t now = ceph_clock_now();
+
+ if (now > lock_start_time + max_secs / 2) { /* do you need to renew lock? */
+ l.set_renew(true);
+ ret = l.lock_exclusive(&store->reshard_pool_ctx, logshard_oid);
+ if (ret == -EBUSY) { /* already locked by another processor */
+ ldout(store->ctx(), 5) << __func__ << "(): failed to acquire lock on " << logshard_oid << dendl;
+ return ret;
+ }
+ lock_start_time = now;
+ }
+ entry.get_key(&marker);
+ }
+ } while (truncated);
+
+ l.unlock(&store->reshard_pool_ctx, logshard_oid);
+ return 0;
+}
+
+
+void RGWReshard::get_logshard_oid(int shard_num, string *logshard)
+{
+ char buf[32];
+ snprintf(buf, sizeof(buf), "%010u", (unsigned)shard_num);
+
+ string objname(reshard_oid_prefix);
+ *logshard = objname + buf;
+}
+
+int RGWReshard::process_all_logshards()
+{
+ if (!store->can_reshard()) {
+ ldout(store->ctx(), 20) << __func__ << " Resharding is disabled" << dendl;
+ return 0;
+ }
+ int ret = 0;
+
+ for (int i = 0; i < num_logshards; i++) {
+ string logshard;
+ get_logshard_oid(i, &logshard);
+
+ ldout(store->ctx(), 20) << "proceeding logshard = " << logshard << dendl;
+
+ ret = process_single_logshard(i);
+ if (ret <0) {
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+bool RGWReshard::going_down()
+{
+ return down_flag;
+}
+
+void RGWReshard::start_processor()
+{
+ worker = new ReshardWorker(store->ctx(), this);
+ worker->create("rgw_reshard");
+}
+
+void RGWReshard::stop_processor()
+{
+ down_flag = true;
+ if (worker) {
+ worker->stop();
+ worker->join();
+ }
+ delete worker;
+ worker = nullptr;
+}
+
+void *RGWReshard::ReshardWorker::entry() {
+ utime_t last_run;
+ do {
+ utime_t start = ceph_clock_now();
+ if (reshard->process_all_logshards()) {
+ /* All shards have been processed properly. Next time we can start
+ * from this moment. */
+ last_run = start;
+ }
+
+ if (reshard->going_down())
+ break;
+
+ utime_t end = ceph_clock_now();
+ end -= start;
+ int secs = cct->_conf->rgw_reshard_thread_interval;
+
+ if (secs <= end.sec())
+ continue; // next round
+
+ secs -= end.sec();
+
+ lock.Lock();
+ cond.WaitInterval(lock, utime_t(secs, 0));
+ lock.Unlock();
+ } while (!reshard->going_down());
+
+ return NULL;
+}
+
+void RGWReshard::ReshardWorker::stop()
+{
+ Mutex::Locker l(lock);
+ cond.Signal();
+}
Code Review / stor4nfv.git / blobdiff