--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#include <errno.h>
+#include <boost/assign/list_of.hpp>
+#include <stddef.h>
+
+#include "common/ceph_context.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "common/perf_counters.h"
+#include "common/WorkQueue.h"
+#include "common/Timer.h"
+
+#include "librbd/AsyncRequest.h"
+#include "librbd/ExclusiveLock.h"
+#include "librbd/internal.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageState.h"
+#include "librbd/ImageWatcher.h"
+#include "librbd/Journal.h"
+#include "librbd/LibrbdAdminSocketHook.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/Operations.h"
+#include "librbd/operation/ResizeRequest.h"
+#include "librbd/Utils.h"
+#include "librbd/LibrbdWriteback.h"
+#include "librbd/exclusive_lock/AutomaticPolicy.h"
+#include "librbd/exclusive_lock/StandardPolicy.h"
+#include "librbd/io/AioCompletion.h"
+#include "librbd/io/AsyncOperation.h"
+#include "librbd/io/ImageRequestWQ.h"
+#include "librbd/journal/StandardPolicy.h"
+
+#include "osdc/Striper.h"
+#include <boost/bind.hpp>
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::ImageCtx: "
+
+using std::map;
+using std::pair;
+using std::set;
+using std::string;
+using std::vector;
+
+using ceph::bufferlist;
+using librados::snap_t;
+using librados::IoCtx;
+
+namespace librbd {
+
+namespace {
+
+class ThreadPoolSingleton : public ThreadPool {
+public:
+ ContextWQ *op_work_queue;
+
+ explicit ThreadPoolSingleton(CephContext *cct)
+ : ThreadPool(cct, "librbd::thread_pool", "tp_librbd", 1,
+ "rbd_op_threads"),
+ op_work_queue(new ContextWQ("librbd::op_work_queue",
+ cct->_conf->get_val<int64_t>("rbd_op_thread_timeout"),
+ this)) {
+ start();
+ }
+ ~ThreadPoolSingleton() override {
+ op_work_queue->drain();
+ delete op_work_queue;
+
+ stop();
+ }
+};
+
+class SafeTimerSingleton : public SafeTimer {
+public:
+ Mutex lock;
+
+ explicit SafeTimerSingleton(CephContext *cct)
+ : SafeTimer(cct, lock, true),
+ lock("librbd::Journal::SafeTimerSingleton::lock") {
+ init();
+ }
+ ~SafeTimerSingleton() {
+ Mutex::Locker locker(lock);
+ shutdown();
+ }
+};
+
+struct C_FlushCache : public Context {
+ ImageCtx *image_ctx;
+ Context *on_safe;
+
+ C_FlushCache(ImageCtx *_image_ctx, Context *_on_safe)
+ : image_ctx(_image_ctx), on_safe(_on_safe) {
+ }
+ void finish(int r) override {
+ // successful cache flush indicates all IO is now safe
+ image_ctx->flush_cache(on_safe);
+ }
+};
+
+struct C_ShutDownCache : public Context {
+ ImageCtx *image_ctx;
+ Context *on_finish;
+
+ C_ShutDownCache(ImageCtx *_image_ctx, Context *_on_finish)
+ : image_ctx(_image_ctx), on_finish(_on_finish) {
+ }
+ void finish(int r) override {
+ image_ctx->object_cacher->stop();
+ on_finish->complete(r);
+ }
+};
+
+struct C_InvalidateCache : public Context {
+ ImageCtx *image_ctx;
+ bool purge_on_error;
+ bool reentrant_safe;
+ Context *on_finish;
+
+ C_InvalidateCache(ImageCtx *_image_ctx, bool _purge_on_error,
+ bool _reentrant_safe, Context *_on_finish)
+ : image_ctx(_image_ctx), purge_on_error(_purge_on_error),
+ reentrant_safe(_reentrant_safe), on_finish(_on_finish) {
+ }
+ void finish(int r) override {
+ assert(image_ctx->cache_lock.is_locked());
+ CephContext *cct = image_ctx->cct;
+
+ if (r == -EBLACKLISTED) {
+ lderr(cct) << "Blacklisted during flush! Purging cache..." << dendl;
+ image_ctx->object_cacher->purge_set(image_ctx->object_set);
+ } else if (r != 0 && purge_on_error) {
+ lderr(cct) << "invalidate cache encountered error "
+ << cpp_strerror(r) << " !Purging cache..." << dendl;
+ image_ctx->object_cacher->purge_set(image_ctx->object_set);
+ } else if (r != 0) {
+ lderr(cct) << "flush_cache returned " << r << dendl;
+ }
+
+ loff_t unclean = image_ctx->object_cacher->release_set(
+ image_ctx->object_set);
+ if (unclean == 0) {
+ r = 0;
+ } else {
+ lderr(cct) << "could not release all objects from cache: "
+ << unclean << " bytes remain" << dendl;
+ if (r == 0) {
+ r = -EBUSY;
+ }
+ }
+
+ if (reentrant_safe) {
+ on_finish->complete(r);
+ } else {
+ image_ctx->op_work_queue->queue(on_finish, r);
+ }
+ }
+
+};
+
+} // anonymous namespace
+
+ const string ImageCtx::METADATA_CONF_PREFIX = "conf_";
+
+ ImageCtx::ImageCtx(const string &image_name, const string &image_id,
+ const char *snap, IoCtx& p, bool ro)
+ : cct((CephContext*)p.cct()),
+ perfcounter(NULL),
+ snap_id(CEPH_NOSNAP),
+ snap_exists(true),
+ read_only(ro),
+ flush_encountered(false),
+ exclusive_locked(false),
+ name(image_name),
+ image_watcher(NULL),
+ journal(NULL),
+ owner_lock(util::unique_lock_name("librbd::ImageCtx::owner_lock", this)),
+ md_lock(util::unique_lock_name("librbd::ImageCtx::md_lock", this)),
+ cache_lock(util::unique_lock_name("librbd::ImageCtx::cache_lock", this)),
+ snap_lock(util::unique_lock_name("librbd::ImageCtx::snap_lock", this)),
+ parent_lock(util::unique_lock_name("librbd::ImageCtx::parent_lock", this)),
+ object_map_lock(util::unique_lock_name("librbd::ImageCtx::object_map_lock", this)),
+ async_ops_lock(util::unique_lock_name("librbd::ImageCtx::async_ops_lock", this)),
+ copyup_list_lock(util::unique_lock_name("librbd::ImageCtx::copyup_list_lock", this)),
+ completed_reqs_lock(util::unique_lock_name("librbd::ImageCtx::completed_reqs_lock", this)),
+ extra_read_flags(0),
+ old_format(true),
+ order(0), size(0), features(0),
+ format_string(NULL),
+ id(image_id), parent(NULL),
+ stripe_unit(0), stripe_count(0), flags(0),
+ object_cacher(NULL), writeback_handler(NULL), object_set(NULL),
+ readahead(),
+ total_bytes_read(0),
+ state(new ImageState<>(this)),
+ operations(new Operations<>(*this)),
+ exclusive_lock(nullptr), object_map(nullptr),
+ io_work_queue(nullptr), op_work_queue(nullptr),
+ asok_hook(nullptr),
+ trace_endpoint("librbd")
+ {
+ md_ctx.dup(p);
+ data_ctx.dup(p);
+ if (snap)
+ snap_name = snap;
+
+ memset(&header, 0, sizeof(header));
+
+ ThreadPool *thread_pool;
+ get_thread_pool_instance(cct, &thread_pool, &op_work_queue);
+ io_work_queue = new io::ImageRequestWQ<>(
+ this, "librbd::io_work_queue",
+ cct->_conf->get_val<int64_t>("rbd_op_thread_timeout"),
+ thread_pool);
+
+ if (cct->_conf->get_val<bool>("rbd_auto_exclusive_lock_until_manual_request")) {
+ exclusive_lock_policy = new exclusive_lock::AutomaticPolicy(this);
+ } else {
+ exclusive_lock_policy = new exclusive_lock::StandardPolicy(this);
+ }
+ journal_policy = new journal::StandardPolicy<ImageCtx>(this);
+ }
+
+ ImageCtx::~ImageCtx() {
+ assert(image_watcher == NULL);
+ assert(exclusive_lock == NULL);
+ assert(object_map == NULL);
+ assert(journal == NULL);
+ assert(asok_hook == NULL);
+
+ if (perfcounter) {
+ perf_stop();
+ }
+ if (object_cacher) {
+ delete object_cacher;
+ object_cacher = NULL;
+ }
+ if (writeback_handler) {
+ delete writeback_handler;
+ writeback_handler = NULL;
+ }
+ if (object_set) {
+ delete object_set;
+ object_set = NULL;
+ }
+ delete[] format_string;
+
+ md_ctx.aio_flush();
+ data_ctx.aio_flush();
+ io_work_queue->drain();
+
+ delete journal_policy;
+ delete exclusive_lock_policy;
+ delete io_work_queue;
+ delete operations;
+ delete state;
+ }
+
+ void ImageCtx::init() {
+ assert(!header_oid.empty());
+ assert(old_format || !id.empty());
+
+ asok_hook = new LibrbdAdminSocketHook(this);
+
+ string pname = string("librbd-") + id + string("-") +
+ data_ctx.get_pool_name() + string("-") + name;
+ if (!snap_name.empty()) {
+ pname += "-";
+ pname += snap_name;
+ }
+
+ trace_endpoint.copy_name(pname);
+ perf_start(pname);
+
+ if (cache) {
+ Mutex::Locker l(cache_lock);
+ ldout(cct, 20) << "enabling caching..." << dendl;
+ writeback_handler = new LibrbdWriteback(this, cache_lock);
+
+ uint64_t init_max_dirty = cache_max_dirty;
+ if (cache_writethrough_until_flush)
+ init_max_dirty = 0;
+ ldout(cct, 20) << "Initial cache settings:"
+ << " size=" << cache_size
+ << " num_objects=" << 10
+ << " max_dirty=" << init_max_dirty
+ << " target_dirty=" << cache_target_dirty
+ << " max_dirty_age="
+ << cache_max_dirty_age << dendl;
+
+ object_cacher = new ObjectCacher(cct, pname, *writeback_handler, cache_lock,
+ NULL, NULL,
+ cache_size,
+ 10, /* reset this in init */
+ init_max_dirty,
+ cache_target_dirty,
+ cache_max_dirty_age,
+ cache_block_writes_upfront);
+
+ // size object cache appropriately
+ uint64_t obj = cache_max_dirty_object;
+ if (!obj) {
+ obj = MIN(2000, MAX(10, cache_size / 100 / sizeof(ObjectCacher::Object)));
+ }
+ ldout(cct, 10) << " cache bytes " << cache_size
+ << " -> about " << obj << " objects" << dendl;
+ object_cacher->set_max_objects(obj);
+
+ object_set = new ObjectCacher::ObjectSet(NULL, data_ctx.get_id(), 0);
+ object_set->return_enoent = true;
+ object_cacher->start();
+ }
+
+ readahead.set_trigger_requests(readahead_trigger_requests);
+ readahead.set_max_readahead_size(readahead_max_bytes);
+ }
+
+ void ImageCtx::shutdown() {
+ delete image_watcher;
+ image_watcher = nullptr;
+
+ delete asok_hook;
+ asok_hook = nullptr;
+ }
+
+ void ImageCtx::init_layout()
+ {
+ if (stripe_unit == 0 || stripe_count == 0) {
+ stripe_unit = 1ull << order;
+ stripe_count = 1;
+ }
+
+ vector<uint64_t> alignments;
+ alignments.push_back(stripe_count << order); // object set (in file striping terminology)
+ alignments.push_back(stripe_unit * stripe_count); // stripe
+ alignments.push_back(stripe_unit); // stripe unit
+ readahead.set_alignments(alignments);
+
+ layout = file_layout_t();
+ layout.stripe_unit = stripe_unit;
+ layout.stripe_count = stripe_count;
+ layout.object_size = 1ull << order;
+ layout.pool_id = data_ctx.get_id(); // FIXME: pool id overflow?
+
+ delete[] format_string;
+ size_t len = object_prefix.length() + 16;
+ format_string = new char[len];
+ if (old_format) {
+ snprintf(format_string, len, "%s.%%012llx", object_prefix.c_str());
+ } else {
+ snprintf(format_string, len, "%s.%%016llx", object_prefix.c_str());
+ }
+
+ ldout(cct, 10) << "init_layout stripe_unit " << stripe_unit
+ << " stripe_count " << stripe_count
+ << " object_size " << layout.object_size
+ << " prefix " << object_prefix
+ << " format " << format_string
+ << dendl;
+ }
+
+ void ImageCtx::perf_start(string name) {
+ PerfCountersBuilder plb(cct, name, l_librbd_first, l_librbd_last);
+
+ plb.add_u64_counter(l_librbd_rd, "rd", "Reads");
+ plb.add_u64_counter(l_librbd_rd_bytes, "rd_bytes", "Data size in reads");
+ plb.add_time_avg(l_librbd_rd_latency, "rd_latency", "Latency of reads");
+ plb.add_u64_counter(l_librbd_wr, "wr", "Writes");
+ plb.add_u64_counter(l_librbd_wr_bytes, "wr_bytes", "Written data");
+ plb.add_time_avg(l_librbd_wr_latency, "wr_latency", "Write latency");
+ plb.add_u64_counter(l_librbd_discard, "discard", "Discards");
+ plb.add_u64_counter(l_librbd_discard_bytes, "discard_bytes", "Discarded data");
+ plb.add_time_avg(l_librbd_discard_latency, "discard_latency", "Discard latency");
+ plb.add_u64_counter(l_librbd_flush, "flush", "Flushes");
+ plb.add_u64_counter(l_librbd_aio_flush, "aio_flush", "Async flushes");
+ plb.add_time_avg(l_librbd_aio_flush_latency, "aio_flush_latency", "Latency of async flushes");
+ plb.add_u64_counter(l_librbd_ws, "ws", "WriteSames");
+ plb.add_u64_counter(l_librbd_ws_bytes, "ws_bytes", "WriteSame data");
+ plb.add_time_avg(l_librbd_ws_latency, "ws_latency", "WriteSame latency");
+ plb.add_u64_counter(l_librbd_cmp, "cmp", "CompareAndWrites");
+ plb.add_u64_counter(l_librbd_cmp_bytes, "cmp_bytes", "Data size in cmps");
+ plb.add_time_avg(l_librbd_cmp_latency, "cmp_latency", "Latency of cmps");
+ plb.add_u64_counter(l_librbd_snap_create, "snap_create", "Snap creations");
+ plb.add_u64_counter(l_librbd_snap_remove, "snap_remove", "Snap removals");
+ plb.add_u64_counter(l_librbd_snap_rollback, "snap_rollback", "Snap rollbacks");
+ plb.add_u64_counter(l_librbd_snap_rename, "snap_rename", "Snap rename");
+ plb.add_u64_counter(l_librbd_notify, "notify", "Updated header notifications");
+ plb.add_u64_counter(l_librbd_resize, "resize", "Resizes");
+ plb.add_u64_counter(l_librbd_readahead, "readahead", "Read ahead");
+ plb.add_u64_counter(l_librbd_readahead_bytes, "readahead_bytes", "Data size in read ahead");
+ plb.add_u64_counter(l_librbd_invalidate_cache, "invalidate_cache", "Cache invalidates");
+
+ perfcounter = plb.create_perf_counters();
+ cct->get_perfcounters_collection()->add(perfcounter);
+ }
+
+ void ImageCtx::perf_stop() {
+ assert(perfcounter);
+ cct->get_perfcounters_collection()->remove(perfcounter);
+ delete perfcounter;
+ }
+
+ void ImageCtx::set_read_flag(unsigned flag) {
+ extra_read_flags |= flag;
+ }
+
+ int ImageCtx::get_read_flags(snap_t snap_id) {
+ int flags = librados::OPERATION_NOFLAG | extra_read_flags;
+ if (snap_id == LIBRADOS_SNAP_HEAD)
+ return flags;
+
+ if (balance_snap_reads)
+ flags |= librados::OPERATION_BALANCE_READS;
+ else if (localize_snap_reads)
+ flags |= librados::OPERATION_LOCALIZE_READS;
+ return flags;
+ }
+
+ int ImageCtx::snap_set(cls::rbd::SnapshotNamespace in_snap_namespace,
+ string in_snap_name)
+ {
+ assert(snap_lock.is_wlocked());
+ snap_t in_snap_id = get_snap_id(in_snap_namespace, in_snap_name);
+ if (in_snap_id != CEPH_NOSNAP) {
+ snap_id = in_snap_id;
+ snap_namespace = in_snap_namespace;
+ snap_name = in_snap_name;
+ snap_exists = true;
+ data_ctx.snap_set_read(snap_id);
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ void ImageCtx::snap_unset()
+ {
+ assert(snap_lock.is_wlocked());
+ snap_id = CEPH_NOSNAP;
+ snap_namespace = {};
+ snap_name = "";
+ snap_exists = true;
+ data_ctx.snap_set_read(snap_id);
+ }
+
+ snap_t ImageCtx::get_snap_id(cls::rbd::SnapshotNamespace in_snap_namespace,
+ string in_snap_name) const
+ {
+ assert(snap_lock.is_locked());
+ auto it = snap_ids.find({in_snap_namespace, in_snap_name});
+ if (it != snap_ids.end())
+ return it->second;
+ return CEPH_NOSNAP;
+ }
+
+ const SnapInfo* ImageCtx::get_snap_info(snap_t in_snap_id) const
+ {
+ assert(snap_lock.is_locked());
+ map<snap_t, SnapInfo>::const_iterator it =
+ snap_info.find(in_snap_id);
+ if (it != snap_info.end())
+ return &it->second;
+ return NULL;
+ }
+
+ int ImageCtx::get_snap_name(snap_t in_snap_id,
+ string *out_snap_name) const
+ {
+ assert(snap_lock.is_locked());
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ *out_snap_name = info->name;
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ int ImageCtx::get_snap_namespace(snap_t in_snap_id,
+ cls::rbd::SnapshotNamespace *out_snap_namespace) const
+ {
+ assert(snap_lock.is_locked());
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ *out_snap_namespace = info->snap_namespace;
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ int ImageCtx::get_parent_spec(snap_t in_snap_id,
+ ParentSpec *out_pspec) const
+ {
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ *out_pspec = info->parent.spec;
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ uint64_t ImageCtx::get_current_size() const
+ {
+ assert(snap_lock.is_locked());
+ return size;
+ }
+
+ uint64_t ImageCtx::get_object_size() const
+ {
+ return 1ull << order;
+ }
+
+ string ImageCtx::get_object_name(uint64_t num) const {
+ char buf[object_prefix.length() + 32];
+ snprintf(buf, sizeof(buf), format_string, num);
+ return string(buf);
+ }
+
+ uint64_t ImageCtx::get_stripe_unit() const
+ {
+ return stripe_unit;
+ }
+
+ uint64_t ImageCtx::get_stripe_count() const
+ {
+ return stripe_count;
+ }
+
+ uint64_t ImageCtx::get_stripe_period() const
+ {
+ return stripe_count * (1ull << order);
+ }
+
+ utime_t ImageCtx::get_create_timestamp() const
+ {
+ return create_timestamp;
+ }
+
+ int ImageCtx::is_snap_protected(snap_t in_snap_id,
+ bool *is_protected) const
+ {
+ assert(snap_lock.is_locked());
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ *is_protected =
+ (info->protection_status == RBD_PROTECTION_STATUS_PROTECTED);
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ int ImageCtx::is_snap_unprotected(snap_t in_snap_id,
+ bool *is_unprotected) const
+ {
+ assert(snap_lock.is_locked());
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ *is_unprotected =
+ (info->protection_status == RBD_PROTECTION_STATUS_UNPROTECTED);
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ void ImageCtx::add_snap(cls::rbd::SnapshotNamespace in_snap_namespace,
+ string in_snap_name,
+ snap_t id, uint64_t in_size,
+ const ParentInfo &parent, uint8_t protection_status,
+ uint64_t flags, utime_t timestamp)
+ {
+ assert(snap_lock.is_wlocked());
+ snaps.push_back(id);
+ SnapInfo info(in_snap_name, in_snap_namespace,
+ in_size, parent, protection_status, flags, timestamp);
+ snap_info.insert({id, info});
+ snap_ids.insert({{in_snap_namespace, in_snap_name}, id});
+ }
+
+ void ImageCtx::rm_snap(cls::rbd::SnapshotNamespace in_snap_namespace,
+ string in_snap_name,
+ snap_t id)
+ {
+ assert(snap_lock.is_wlocked());
+ snaps.erase(std::remove(snaps.begin(), snaps.end(), id), snaps.end());
+ snap_info.erase(id);
+ snap_ids.erase({in_snap_namespace, in_snap_name});
+ }
+
+ uint64_t ImageCtx::get_image_size(snap_t in_snap_id) const
+ {
+ assert(snap_lock.is_locked());
+ if (in_snap_id == CEPH_NOSNAP) {
+ if (!resize_reqs.empty() &&
+ resize_reqs.front()->shrinking()) {
+ return resize_reqs.front()->get_image_size();
+ }
+ return size;
+ }
+
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info) {
+ return info->size;
+ }
+ return 0;
+ }
+
+ uint64_t ImageCtx::get_object_count(snap_t in_snap_id) const {
+ assert(snap_lock.is_locked());
+ uint64_t image_size = get_image_size(in_snap_id);
+ return Striper::get_num_objects(layout, image_size);
+ }
+
+ bool ImageCtx::test_features(uint64_t features) const
+ {
+ RWLock::RLocker l(snap_lock);
+ return test_features(features, snap_lock);
+ }
+
+ bool ImageCtx::test_features(uint64_t in_features,
+ const RWLock &in_snap_lock) const
+ {
+ assert(snap_lock.is_locked());
+ return ((features & in_features) == in_features);
+ }
+
+ int ImageCtx::get_flags(librados::snap_t _snap_id, uint64_t *_flags) const
+ {
+ assert(snap_lock.is_locked());
+ if (_snap_id == CEPH_NOSNAP) {
+ *_flags = flags;
+ return 0;
+ }
+ const SnapInfo *info = get_snap_info(_snap_id);
+ if (info) {
+ *_flags = info->flags;
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ int ImageCtx::test_flags(uint64_t flags, bool *flags_set) const
+ {
+ RWLock::RLocker l(snap_lock);
+ return test_flags(flags, snap_lock, flags_set);
+ }
+
+ int ImageCtx::test_flags(uint64_t flags, const RWLock &in_snap_lock,
+ bool *flags_set) const
+ {
+ assert(snap_lock.is_locked());
+ uint64_t snap_flags;
+ int r = get_flags(snap_id, &snap_flags);
+ if (r < 0) {
+ return r;
+ }
+ *flags_set = ((snap_flags & flags) == flags);
+ return 0;
+ }
+
+ int ImageCtx::update_flags(snap_t in_snap_id, uint64_t flag, bool enabled)
+ {
+ assert(snap_lock.is_wlocked());
+ uint64_t *_flags;
+ if (in_snap_id == CEPH_NOSNAP) {
+ _flags = &flags;
+ } else {
+ map<snap_t, SnapInfo>::iterator it = snap_info.find(in_snap_id);
+ if (it == snap_info.end()) {
+ return -ENOENT;
+ }
+ _flags = &it->second.flags;
+ }
+
+ if (enabled) {
+ (*_flags) |= flag;
+ } else {
+ (*_flags) &= ~flag;
+ }
+ return 0;
+ }
+
+ const ParentInfo* ImageCtx::get_parent_info(snap_t in_snap_id) const
+ {
+ assert(snap_lock.is_locked());
+ assert(parent_lock.is_locked());
+ if (in_snap_id == CEPH_NOSNAP)
+ return &parent_md;
+ const SnapInfo *info = get_snap_info(in_snap_id);
+ if (info)
+ return &info->parent;
+ return NULL;
+ }
+
+ int64_t ImageCtx::get_parent_pool_id(snap_t in_snap_id) const
+ {
+ const ParentInfo *info = get_parent_info(in_snap_id);
+ if (info)
+ return info->spec.pool_id;
+ return -1;
+ }
+
+ string ImageCtx::get_parent_image_id(snap_t in_snap_id) const
+ {
+ const ParentInfo *info = get_parent_info(in_snap_id);
+ if (info)
+ return info->spec.image_id;
+ return "";
+ }
+
+ uint64_t ImageCtx::get_parent_snap_id(snap_t in_snap_id) const
+ {
+ const ParentInfo *info = get_parent_info(in_snap_id);
+ if (info)
+ return info->spec.snap_id;
+ return CEPH_NOSNAP;
+ }
+
+ int ImageCtx::get_parent_overlap(snap_t in_snap_id, uint64_t *overlap) const
+ {
+ assert(snap_lock.is_locked());
+ const ParentInfo *info = get_parent_info(in_snap_id);
+ if (info) {
+ *overlap = info->overlap;
+ return 0;
+ }
+ return -ENOENT;
+ }
+
+ void ImageCtx::aio_read_from_cache(object_t o, uint64_t object_no,
+ bufferlist *bl, size_t len,
+ uint64_t off, Context *onfinish,
+ int fadvise_flags, ZTracer::Trace *trace) {
+ snap_lock.get_read();
+ ObjectCacher::OSDRead *rd = object_cacher->prepare_read(snap_id, bl, fadvise_flags);
+ snap_lock.put_read();
+ ObjectExtent extent(o, object_no, off, len, 0);
+ extent.oloc.pool = data_ctx.get_id();
+ extent.buffer_extents.push_back(make_pair(0, len));
+ rd->extents.push_back(extent);
+ cache_lock.Lock();
+ int r = object_cacher->readx(rd, object_set, onfinish, trace);
+ cache_lock.Unlock();
+ if (r != 0)
+ onfinish->complete(r);
+ }
+
+ void ImageCtx::write_to_cache(object_t o, const bufferlist& bl, size_t len,
+ uint64_t off, Context *onfinish,
+ int fadvise_flags, uint64_t journal_tid,
+ ZTracer::Trace *trace) {
+ snap_lock.get_read();
+ ObjectCacher::OSDWrite *wr = object_cacher->prepare_write(
+ snapc, bl, ceph::real_time::min(), fadvise_flags, journal_tid);
+ snap_lock.put_read();
+ ObjectExtent extent(o, 0, off, len, 0);
+ extent.oloc.pool = data_ctx.get_id();
+ // XXX: nspace is always default, io_ctx_impl field private
+ //extent.oloc.nspace = data_ctx.io_ctx_impl->oloc.nspace;
+ extent.buffer_extents.push_back(make_pair(0, len));
+ wr->extents.push_back(extent);
+ {
+ Mutex::Locker l(cache_lock);
+ object_cacher->writex(wr, object_set, onfinish, trace);
+ }
+ }
+
+ void ImageCtx::user_flushed() {
+ if (object_cacher && cache_writethrough_until_flush) {
+ md_lock.get_read();
+ bool flushed_before = flush_encountered;
+ md_lock.put_read();
+
+ uint64_t max_dirty = cache_max_dirty;
+ if (!flushed_before && max_dirty > 0) {
+ md_lock.get_write();
+ flush_encountered = true;
+ md_lock.put_write();
+
+ ldout(cct, 10) << "saw first user flush, enabling writeback" << dendl;
+ Mutex::Locker l(cache_lock);
+ object_cacher->set_max_dirty(max_dirty);
+ }
+ }
+ }
+
+ void ImageCtx::flush_cache(Context *onfinish) {
+ cache_lock.Lock();
+ object_cacher->flush_set(object_set, onfinish);
+ cache_lock.Unlock();
+ }
+
+ void ImageCtx::shut_down_cache(Context *on_finish) {
+ if (object_cacher == NULL) {
+ on_finish->complete(0);
+ return;
+ }
+
+ cache_lock.Lock();
+ object_cacher->release_set(object_set);
+ cache_lock.Unlock();
+
+ C_ShutDownCache *shut_down = new C_ShutDownCache(this, on_finish);
+ flush_cache(new C_InvalidateCache(this, true, false, shut_down));
+ }
+
+ int ImageCtx::invalidate_cache(bool purge_on_error) {
+ flush_async_operations();
+ if (object_cacher == NULL) {
+ return 0;
+ }
+
+ cache_lock.Lock();
+ object_cacher->release_set(object_set);
+ cache_lock.Unlock();
+
+ C_SaferCond ctx;
+ flush_cache(new C_InvalidateCache(this, purge_on_error, true, &ctx));
+
+ int result = ctx.wait();
+ return result;
+ }
+
+ void ImageCtx::invalidate_cache(bool purge_on_error, Context *on_finish) {
+ if (object_cacher == NULL) {
+ op_work_queue->queue(on_finish, 0);
+ return;
+ }
+
+ cache_lock.Lock();
+ object_cacher->release_set(object_set);
+ cache_lock.Unlock();
+
+ flush_cache(new C_InvalidateCache(this, purge_on_error, false, on_finish));
+ }
+
+ void ImageCtx::clear_nonexistence_cache() {
+ assert(cache_lock.is_locked());
+ if (!object_cacher)
+ return;
+ object_cacher->clear_nonexistence(object_set);
+ }
+
+ bool ImageCtx::is_cache_empty() {
+ Mutex::Locker locker(cache_lock);
+ return object_cacher->set_is_empty(object_set);
+ }
+
+ void ImageCtx::register_watch(Context *on_finish) {
+ assert(image_watcher == NULL);
+ image_watcher = new ImageWatcher<>(*this);
+ image_watcher->register_watch(on_finish);
+ }
+
+ uint64_t ImageCtx::prune_parent_extents(vector<pair<uint64_t,uint64_t> >& objectx,
+ uint64_t overlap)
+ {
+ // drop extents completely beyond the overlap
+ while (!objectx.empty() && objectx.back().first >= overlap)
+ objectx.pop_back();
+
+ // trim final overlapping extent
+ if (!objectx.empty() && objectx.back().first + objectx.back().second > overlap)
+ objectx.back().second = overlap - objectx.back().first;
+
+ uint64_t len = 0;
+ for (vector<pair<uint64_t,uint64_t> >::iterator p = objectx.begin();
+ p != objectx.end();
+ ++p)
+ len += p->second;
+ ldout(cct, 10) << "prune_parent_extents image overlap " << overlap
+ << ", object overlap " << len
+ << " from image extents " << objectx << dendl;
+ return len;
+ }
+
+ void ImageCtx::flush_async_operations() {
+ C_SaferCond ctx;
+ flush_async_operations(&ctx);
+ ctx.wait();
+ }
+
+ void ImageCtx::flush_async_operations(Context *on_finish) {
+ {
+ Mutex::Locker l(async_ops_lock);
+ if (!async_ops.empty()) {
+ ldout(cct, 20) << "flush async operations: " << on_finish << " "
+ << "count=" << async_ops.size() << dendl;
+ async_ops.front()->add_flush_context(on_finish);
+ return;
+ }
+ }
+ on_finish->complete(0);
+ }
+
+ int ImageCtx::flush() {
+ C_SaferCond cond_ctx;
+ flush(&cond_ctx);
+ return cond_ctx.wait();
+ }
+
+ void ImageCtx::flush(Context *on_safe) {
+ // ensure no locks are held when flush is complete
+ on_safe = util::create_async_context_callback(*this, on_safe);
+
+ if (object_cacher != NULL) {
+ // flush cache after completing all in-flight AIO ops
+ on_safe = new C_FlushCache(this, on_safe);
+ }
+ flush_async_operations(on_safe);
+ }
+
+ void ImageCtx::cancel_async_requests() {
+ C_SaferCond ctx;
+ cancel_async_requests(&ctx);
+ ctx.wait();
+ }
+
+ void ImageCtx::cancel_async_requests(Context *on_finish) {
+ {
+ Mutex::Locker async_ops_locker(async_ops_lock);
+ if (!async_requests.empty()) {
+ ldout(cct, 10) << "canceling async requests: count="
+ << async_requests.size() << dendl;
+ for (auto req : async_requests) {
+ ldout(cct, 10) << "canceling async request: " << req << dendl;
+ req->cancel();
+ }
+ async_requests_waiters.push_back(on_finish);
+ return;
+ }
+ }
+
+ on_finish->complete(0);
+ }
+
+ void ImageCtx::clear_pending_completions() {
+ Mutex::Locker l(completed_reqs_lock);
+ ldout(cct, 10) << "clear pending AioCompletion: count="
+ << completed_reqs.size() << dendl;
+ completed_reqs.clear();
+ }
+
+ bool ImageCtx::_filter_metadata_confs(const string &prefix,
+ map<string, bool> &configs,
+ const map<string, bufferlist> &pairs,
+ map<string, bufferlist> *res) {
+ size_t conf_prefix_len = prefix.size();
+
+ for (auto it : pairs) {
+ if (it.first.compare(0, MIN(conf_prefix_len, it.first.size()), prefix) > 0)
+ return false;
+
+ if (it.first.size() <= conf_prefix_len)
+ continue;
+
+ string key = it.first.substr(conf_prefix_len, it.first.size() - conf_prefix_len);
+ auto cit = configs.find(key);
+ if (cit != configs.end()) {
+ cit->second = true;
+ res->insert(make_pair(key, it.second));
+ }
+ }
+ return true;
+ }
+
+ void ImageCtx::apply_metadata(const std::map<std::string, bufferlist> &meta) {
+ ldout(cct, 20) << __func__ << dendl;
+ std::map<string, bool> configs = boost::assign::map_list_of(
+ "rbd_non_blocking_aio", false)(
+ "rbd_cache", false)(
+ "rbd_cache_writethrough_until_flush", false)(
+ "rbd_cache_size", false)(
+ "rbd_cache_max_dirty", false)(
+ "rbd_cache_target_dirty", false)(
+ "rbd_cache_max_dirty_age", false)(
+ "rbd_cache_max_dirty_object", false)(
+ "rbd_cache_block_writes_upfront", false)(
+ "rbd_concurrent_management_ops", false)(
+ "rbd_balance_snap_reads", false)(
+ "rbd_localize_snap_reads", false)(
+ "rbd_balance_parent_reads", false)(
+ "rbd_localize_parent_reads", false)(
+ "rbd_readahead_trigger_requests", false)(
+ "rbd_readahead_max_bytes", false)(
+ "rbd_readahead_disable_after_bytes", false)(
+ "rbd_clone_copy_on_read", false)(
+ "rbd_blacklist_on_break_lock", false)(
+ "rbd_blacklist_expire_seconds", false)(
+ "rbd_request_timed_out_seconds", false)(
+ "rbd_journal_order", false)(
+ "rbd_journal_splay_width", false)(
+ "rbd_journal_commit_age", false)(
+ "rbd_journal_object_flush_interval", false)(
+ "rbd_journal_object_flush_bytes", false)(
+ "rbd_journal_object_flush_age", false)(
+ "rbd_journal_pool", false)(
+ "rbd_journal_max_payload_bytes", false)(
+ "rbd_journal_max_concurrent_object_sets", false)(
+ "rbd_mirroring_resync_after_disconnect", false)(
+ "rbd_mirroring_replay_delay", false)(
+ "rbd_skip_partial_discard", false);
+
+ md_config_t local_config_t;
+ std::map<std::string, bufferlist> res;
+
+ _filter_metadata_confs(METADATA_CONF_PREFIX, configs, meta, &res);
+ for (auto it : res) {
+ std::string val(it.second.c_str(), it.second.length());
+ int j = local_config_t.set_val(it.first.c_str(), val);
+ if (j < 0) {
+ lderr(cct) << __func__ << " failed to set config " << it.first
+ << " with value " << it.second.c_str() << ": " << j
+ << dendl;
+ }
+ }
+
+#define ASSIGN_OPTION(config, type) \
+ do { \
+ string key = "rbd_"; \
+ key = key + #config; \
+ if (configs[key]) \
+ config = local_config_t.get_val<type>("rbd_"#config); \
+ else \
+ config = cct->_conf->get_val<type>("rbd_"#config); \
+ } while (0);
+
+ ASSIGN_OPTION(non_blocking_aio, bool);
+ ASSIGN_OPTION(cache, bool);
+ ASSIGN_OPTION(cache_writethrough_until_flush, bool);
+ ASSIGN_OPTION(cache_size, int64_t);
+ ASSIGN_OPTION(cache_max_dirty, int64_t);
+ ASSIGN_OPTION(cache_target_dirty, int64_t);
+ ASSIGN_OPTION(cache_max_dirty_age, double);
+ ASSIGN_OPTION(cache_max_dirty_object, int64_t);
+ ASSIGN_OPTION(cache_block_writes_upfront, bool);
+ ASSIGN_OPTION(concurrent_management_ops, int64_t);
+ ASSIGN_OPTION(balance_snap_reads, bool);
+ ASSIGN_OPTION(localize_snap_reads, bool);
+ ASSIGN_OPTION(balance_parent_reads, bool);
+ ASSIGN_OPTION(localize_parent_reads, bool);
+ ASSIGN_OPTION(readahead_trigger_requests, int64_t);
+ ASSIGN_OPTION(readahead_max_bytes, int64_t);
+ ASSIGN_OPTION(readahead_disable_after_bytes, int64_t);
+ ASSIGN_OPTION(clone_copy_on_read, bool);
+ ASSIGN_OPTION(blacklist_on_break_lock, bool);
+ ASSIGN_OPTION(blacklist_expire_seconds, int64_t);
+ ASSIGN_OPTION(request_timed_out_seconds, int64_t);
+ ASSIGN_OPTION(enable_alloc_hint, bool);
+ ASSIGN_OPTION(journal_order, uint64_t);
+ ASSIGN_OPTION(journal_splay_width, uint64_t);
+ ASSIGN_OPTION(journal_commit_age, double);
+ ASSIGN_OPTION(journal_object_flush_interval, int64_t);
+ ASSIGN_OPTION(journal_object_flush_bytes, int64_t);
+ ASSIGN_OPTION(journal_object_flush_age, double);
+ ASSIGN_OPTION(journal_pool, std::string);
+ ASSIGN_OPTION(journal_max_payload_bytes, uint64_t);
+ ASSIGN_OPTION(journal_max_concurrent_object_sets, int64_t);
+ ASSIGN_OPTION(mirroring_resync_after_disconnect, bool);
+ ASSIGN_OPTION(mirroring_replay_delay, int64_t);
+ ASSIGN_OPTION(skip_partial_discard, bool);
+ ASSIGN_OPTION(blkin_trace_all, bool);
+ }
+
+ ExclusiveLock<ImageCtx> *ImageCtx::create_exclusive_lock() {
+ return new ExclusiveLock<ImageCtx>(*this);
+ }
+
+ ObjectMap<ImageCtx> *ImageCtx::create_object_map(uint64_t snap_id) {
+ return new ObjectMap<ImageCtx>(*this, snap_id);
+ }
+
+ Journal<ImageCtx> *ImageCtx::create_journal() {
+ return new Journal<ImageCtx>(*this);
+ }
+
+ void ImageCtx::set_image_name(const std::string &image_name) {
+ // update the name so rename can be invoked repeatedly
+ RWLock::RLocker owner_locker(owner_lock);
+ RWLock::WLocker snap_locker(snap_lock);
+ name = image_name;
+ if (old_format) {
+ header_oid = util::old_header_name(image_name);
+ }
+ }
+
+ void ImageCtx::notify_update() {
+ state->handle_update_notification();
+ ImageWatcher<>::notify_header_update(md_ctx, header_oid);
+ }
+
+ void ImageCtx::notify_update(Context *on_finish) {
+ state->handle_update_notification();
+ image_watcher->notify_header_update(on_finish);
+ }
+
+ exclusive_lock::Policy *ImageCtx::get_exclusive_lock_policy() const {
+ assert(owner_lock.is_locked());
+ assert(exclusive_lock_policy != nullptr);
+ return exclusive_lock_policy;
+ }
+
+ void ImageCtx::set_exclusive_lock_policy(exclusive_lock::Policy *policy) {
+ assert(owner_lock.is_wlocked());
+ assert(policy != nullptr);
+ delete exclusive_lock_policy;
+ exclusive_lock_policy = policy;
+ }
+
+ journal::Policy *ImageCtx::get_journal_policy() const {
+ assert(snap_lock.is_locked());
+ assert(journal_policy != nullptr);
+ return journal_policy;
+ }
+
+ void ImageCtx::set_journal_policy(journal::Policy *policy) {
+ assert(snap_lock.is_wlocked());
+ assert(policy != nullptr);
+ delete journal_policy;
+ journal_policy = policy;
+ }
+
+ void ImageCtx::get_thread_pool_instance(CephContext *cct,
+ ThreadPool **thread_pool,
+ ContextWQ **op_work_queue) {
+ ThreadPoolSingleton *thread_pool_singleton;
+ cct->lookup_or_create_singleton_object<ThreadPoolSingleton>(
+ thread_pool_singleton, "librbd::thread_pool");
+ *thread_pool = thread_pool_singleton;
+ *op_work_queue = thread_pool_singleton->op_work_queue;
+ }
+
+ void ImageCtx::get_timer_instance(CephContext *cct, SafeTimer **timer,
+ Mutex **timer_lock) {
+ SafeTimerSingleton *safe_timer_singleton;
+ cct->lookup_or_create_singleton_object<SafeTimerSingleton>(
+ safe_timer_singleton, "librbd::journal::safe_timer");
+ *timer = safe_timer_singleton;
+ *timer_lock = &safe_timer_singleton->lock;
+ }
+}
Code Review / stor4nfv.git / blobdiff