+++ /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