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-rw-r--r--src/rbd_replay/rbd-replay-prep.cc583
1 files changed, 583 insertions, 0 deletions
diff --git a/src/rbd_replay/rbd-replay-prep.cc b/src/rbd_replay/rbd-replay-prep.cc
new file mode 100644
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+++ b/src/rbd_replay/rbd-replay-prep.cc
@@ -0,0 +1,583 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2014 Adam Crume <adamcrume@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+// This code assumes that IO IDs and timestamps are related monotonically.
+// In other words, (a.id < b.id) == (a.timestamp < b.timestamp) for all IOs a and b.
+
+#include "common/errno.h"
+#include "rbd_replay/ActionTypes.h"
+#include <babeltrace/babeltrace.h>
+#include <babeltrace/ctf/events.h>
+#include <babeltrace/ctf/iterator.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <cstdlib>
+#include <string>
+#include <assert.h>
+#include <fstream>
+#include <set>
+#include <boost/thread/thread.hpp>
+#include <boost/scope_exit.hpp>
+#include "ios.hpp"
+
+using namespace std;
+using namespace rbd_replay;
+
+#define ASSERT_EXIT(check, str) \
+ if (!(check)) { \
+ std::cerr << str << std::endl; \
+ exit(1); \
+ }
+
+class Thread {
+public:
+ typedef boost::shared_ptr<Thread> ptr;
+
+ Thread(thread_id_t id,
+ uint64_t window)
+ : m_id(id),
+ m_window(window),
+ m_latest_io(IO::ptr()),
+ m_max_ts(0) {
+ }
+
+ void insert_ts(uint64_t ts) {
+ if (m_max_ts == 0 || ts > m_max_ts) {
+ m_max_ts = ts;
+ }
+ }
+
+ uint64_t max_ts() const {
+ return m_max_ts;
+ }
+
+ void issued_io(IO::ptr io, std::set<IO::ptr> *latest_ios) {
+ ceph_assert(io);
+ if (m_latest_io.get() != NULL) {
+ latest_ios->erase(m_latest_io);
+ }
+ m_latest_io = io;
+ latest_ios->insert(io);
+ }
+
+ thread_id_t id() const {
+ return m_id;
+ }
+
+ IO::ptr latest_io() {
+ return m_latest_io;
+ }
+
+private:
+ thread_id_t m_id;
+ uint64_t m_window;
+ IO::ptr m_latest_io;
+ uint64_t m_max_ts;
+};
+
+class AnonymizedImage {
+public:
+ void init(const string &image_name, int index) {
+ ceph_assert(m_image_name == "");
+ m_image_name = image_name;
+ ostringstream oss;
+ oss << "image" << index;
+ m_anonymized_image_name = oss.str();
+ }
+
+ string image_name() const {
+ return m_image_name;
+ }
+
+ pair<string, string> anonymize(string snap_name) {
+ if (snap_name == "") {
+ return pair<string, string>(m_anonymized_image_name, "");
+ }
+ string& anonymized_snap_name(m_snaps[snap_name]);
+ if (anonymized_snap_name == "") {
+ ostringstream oss;
+ oss << "snap" << m_snaps.size();
+ anonymized_snap_name = oss.str();
+ }
+ return pair<string, string>(m_anonymized_image_name, anonymized_snap_name);
+ }
+
+private:
+ string m_image_name;
+ string m_anonymized_image_name;
+ map<string, string> m_snaps;
+};
+
+static void usage(const string &prog) {
+ std::stringstream str;
+ str << "Usage: " << prog << " ";
+ std::cout << str.str() << "[ --window <seconds> ] [ --anonymize ] [ --verbose ]" << std::endl
+ << std::string(str.str().size(), ' ') << "<trace-input> <replay-output>" << endl;
+}
+
+__attribute__((noreturn)) static void usage_exit(const string &prog, const string &msg) {
+ cerr << msg << endl;
+ usage(prog);
+ exit(1);
+}
+
+class Processor {
+public:
+ Processor()
+ : m_window(1000000000ULL), // 1 billion nanoseconds, i.e., one second
+ m_io_count(0),
+ m_anonymize(false),
+ m_verbose(false) {
+ }
+
+ void run(vector<string> args) {
+ string input_file_name;
+ string output_file_name;
+ bool got_input = false;
+ bool got_output = false;
+ for (int i = 1, nargs = args.size(); i < nargs; i++) {
+ const string& arg(args[i]);
+ if (arg == "--window") {
+ if (i == nargs - 1) {
+ usage_exit(args[0], "--window requires an argument");
+ }
+ m_window = (uint64_t)(1e9 * atof(args[++i].c_str()));
+ } else if (arg.compare(0, 9, "--window=") == 0) {
+ m_window = (uint64_t)(1e9 * atof(arg.c_str() + sizeof("--window=")));
+ } else if (arg == "--anonymize") {
+ m_anonymize = true;
+ } else if (arg == "--verbose") {
+ m_verbose = true;
+ } else if (arg == "-h" || arg == "--help") {
+ usage(args[0]);
+ exit(0);
+ } else if (arg.compare(0, 1, "-") == 0) {
+ usage_exit(args[0], "Unrecognized argument: " + arg);
+ } else if (!got_input) {
+ input_file_name = arg;
+ got_input = true;
+ } else if (!got_output) {
+ output_file_name = arg;
+ got_output = true;
+ } else {
+ usage_exit(args[0], "Too many arguments");
+ }
+ }
+ if (!got_output) {
+ usage_exit(args[0], "Not enough arguments");
+ }
+
+ struct bt_context *ctx = bt_context_create();
+ int trace_handle = bt_context_add_trace(ctx,
+ input_file_name.c_str(), // path
+ "ctf", // format
+ NULL, // packet_seek
+ NULL, // stream_list
+ NULL); // metadata
+ ASSERT_EXIT(trace_handle >= 0, "Error loading trace file");
+
+ uint64_t start_time_ns = bt_trace_handle_get_timestamp_begin(ctx, trace_handle, BT_CLOCK_REAL);
+ ASSERT_EXIT(start_time_ns != -1ULL,
+ "Error extracting creation time from trace");
+
+ struct bt_ctf_iter *itr = bt_ctf_iter_create(ctx,
+ NULL, // begin_pos
+ NULL); // end_pos
+ ceph_assert(itr);
+
+ struct bt_iter *bt_itr = bt_ctf_get_iter(itr);
+
+ int fd = open(output_file_name.c_str(), O_WRONLY | O_CREAT | O_EXCL, 0644);
+ ASSERT_EXIT(fd >= 0, "Error opening output file " << output_file_name <<
+ ": " << cpp_strerror(errno));
+ BOOST_SCOPE_EXIT( (fd) ) {
+ close(fd);
+ } BOOST_SCOPE_EXIT_END;
+
+ write_banner(fd);
+
+ uint64_t trace_start = 0;
+ bool first = true;
+ while(true) {
+ struct bt_ctf_event *evt = bt_ctf_iter_read_event(itr);
+ if(!evt) {
+ break;
+ }
+ uint64_t ts = bt_ctf_get_timestamp(evt);
+ ASSERT_EXIT(ts != -1ULL, "Error extracting event timestamp");
+
+ if (first) {
+ trace_start = ts;
+ first = false;
+ }
+ ts -= trace_start;
+ ts += 4; // This is so we have room to insert two events (thread start and open image) at unique timestamps before whatever the first event is.
+
+ IO::ptrs ptrs;
+ process_event(ts, evt, &ptrs);
+ serialize_events(fd, ptrs);
+
+ int r = bt_iter_next(bt_itr);
+ ASSERT_EXIT(r == 0, "Error advancing event iterator");
+ }
+
+ bt_ctf_iter_destroy(itr);
+
+ insert_thread_stops(fd);
+ }
+
+private:
+ void write_banner(int fd) {
+ bufferlist bl;
+ bl.append(rbd_replay::action::BANNER);
+ int r = bl.write_fd(fd);
+ ASSERT_EXIT(r >= 0, "Error writing to output file: " << cpp_strerror(r));
+ }
+
+ void serialize_events(int fd, const IO::ptrs &ptrs) {
+ for (IO::ptrs::const_iterator it = ptrs.begin(); it != ptrs.end(); ++it) {
+ IO::ptr io(*it);
+
+ bufferlist bl;
+ io->encode(bl);
+
+ int r = bl.write_fd(fd);
+ ASSERT_EXIT(r >= 0, "Error writing to output file: " << cpp_strerror(r));
+
+ if (m_verbose) {
+ io->write_debug(std::cout);
+ std::cout << std::endl;
+ }
+ }
+ }
+
+ void insert_thread_stops(int fd) {
+ IO::ptrs ios;
+ for (map<thread_id_t, Thread::ptr>::const_iterator itr = m_threads.begin(),
+ end = m_threads.end(); itr != end; ++itr) {
+ Thread::ptr thread(itr->second);
+ ios.push_back(IO::ptr(new StopThreadIO(next_id(), thread->max_ts(),
+ thread->id(),
+ m_recent_completions)));
+ }
+ serialize_events(fd, ios);
+ }
+
+ void process_event(uint64_t ts, struct bt_ctf_event *evt,
+ IO::ptrs *ios) {
+ const char *event_name = bt_ctf_event_name(evt);
+ const struct bt_definition *scope_context = bt_ctf_get_top_level_scope(evt,
+ BT_STREAM_EVENT_CONTEXT);
+ ASSERT_EXIT(scope_context != NULL, "Error retrieving event context");
+
+ const struct bt_definition *scope_fields = bt_ctf_get_top_level_scope(evt,
+ BT_EVENT_FIELDS);
+ ASSERT_EXIT(scope_fields != NULL, "Error retrieving event fields");
+
+ const struct bt_definition *pthread_id_field = bt_ctf_get_field(evt, scope_context, "pthread_id");
+ ASSERT_EXIT(pthread_id_field != NULL, "Error retrieving thread id");
+
+ thread_id_t threadID = bt_ctf_get_uint64(pthread_id_field);
+ Thread::ptr &thread(m_threads[threadID]);
+ if (!thread) {
+ thread.reset(new Thread(threadID, m_window));
+ IO::ptr io(new StartThreadIO(next_id(), ts - 4, threadID));
+ ios->push_back(io);
+ }
+ thread->insert_ts(ts);
+
+ class FieldLookup {
+ public:
+ FieldLookup(struct bt_ctf_event *evt,
+ const struct bt_definition *scope)
+ : m_evt(evt),
+ m_scope(scope) {
+ }
+
+ const char* string(const char* name) {
+ const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
+ ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
+
+ const char* c = bt_ctf_get_string(field);
+ int err = bt_ctf_field_get_error();
+ ASSERT_EXIT(c && err == 0, "Error retrieving field value '" << name <<
+ "': error=" << err);
+ return c;
+ }
+
+ int64_t int64(const char* name) {
+ const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
+ ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
+
+ int64_t val = bt_ctf_get_int64(field);
+ int err = bt_ctf_field_get_error();
+ ASSERT_EXIT(err == 0, "Error retrieving field value '" << name <<
+ "': error=" << err);
+ return val;
+ }
+
+ uint64_t uint64(const char* name) {
+ const struct bt_definition *field = bt_ctf_get_field(m_evt, m_scope, name);
+ ASSERT_EXIT(field != NULL, "Error retrieving field '" << name << "'");
+
+ uint64_t val = bt_ctf_get_uint64(field);
+ int err = bt_ctf_field_get_error();
+ ASSERT_EXIT(err == 0, "Error retrieving field value '" << name <<
+ "': error=" << err);
+ return val;
+ }
+
+ private:
+ struct bt_ctf_event *m_evt;
+ const struct bt_definition *m_scope;
+ } fields(evt, scope_fields);
+
+ if (strcmp(event_name, "librbd:open_image_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.uint64("read_only");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ action_id_t ionum = next_id();
+ pair<string, string> aname(map_image_snap(name, snap_name));
+ IO::ptr io(new OpenImageIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, aname.first, aname.second,
+ readonly));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ } else if (strcmp(event_name, "librbd:open_image_exit") == 0) {
+ completed(thread->latest_io());
+ boost::shared_ptr<OpenImageIO> io(boost::dynamic_pointer_cast<OpenImageIO>(thread->latest_io()));
+ ceph_assert(io);
+ m_open_images.insert(io->imagectx());
+ } else if (strcmp(event_name, "librbd:close_image_enter") == 0) {
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ action_id_t ionum = next_id();
+ IO::ptr io(new CloseImageIO(ionum, ts, threadID, m_recent_completions,
+ imagectx));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(thread->latest_io());
+ } else if (strcmp(event_name, "librbd:close_image_exit") == 0) {
+ completed(thread->latest_io());
+ boost::shared_ptr<CloseImageIO> io(boost::dynamic_pointer_cast<CloseImageIO>(thread->latest_io()));
+ ceph_assert(io);
+ m_open_images.erase(io->imagectx());
+ } else if (strcmp(event_name, "librbd:aio_open_image_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.uint64("read_only");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ uint64_t completion = fields.uint64("completion");
+ action_id_t ionum = next_id();
+ pair<string, string> aname(map_image_snap(name, snap_name));
+ IO::ptr io(new AioOpenImageIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, aname.first, aname.second,
+ readonly));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ m_pending_ios[completion] = io;
+ } else if (strcmp(event_name, "librbd:aio_close_image_enter") == 0) {
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ uint64_t completion = fields.uint64("completion");
+ action_id_t ionum = next_id();
+ IO::ptr io(new AioCloseImageIO(ionum, ts, threadID, m_recent_completions,
+ imagectx));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(thread->latest_io());
+ m_pending_ios[completion] = io;
+ } else if (strcmp(event_name, "librbd:read_enter") == 0 ||
+ strcmp(event_name, "librbd:read2_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ uint64_t offset = fields.uint64("offset");
+ uint64_t length = fields.uint64("length");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new ReadIO(ionum, ts, threadID, m_recent_completions, imagectx,
+ offset, length));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ } else if (strcmp(event_name, "librbd:read_exit") == 0) {
+ completed(thread->latest_io());
+ } else if (strcmp(event_name, "librbd:write_enter") == 0 ||
+ strcmp(event_name, "librbd:write2_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ uint64_t offset = fields.uint64("off");
+ uint64_t length = fields.uint64("buf_len");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new WriteIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, offset, length));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ } else if (strcmp(event_name, "librbd:write_exit") == 0) {
+ completed(thread->latest_io());
+ } else if (strcmp(event_name, "librbd:discard_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ uint64_t offset = fields.uint64("off");
+ uint64_t length = fields.uint64("len");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new DiscardIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, offset, length));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ } else if (strcmp(event_name, "librbd:discard_exit") == 0) {
+ completed(thread->latest_io());
+ } else if (strcmp(event_name, "librbd:aio_read_enter") == 0 ||
+ strcmp(event_name, "librbd:aio_read2_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ uint64_t completion = fields.uint64("completion");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ uint64_t offset = fields.uint64("offset");
+ uint64_t length = fields.uint64("length");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new AioReadIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, offset, length));
+ ios->push_back(io);
+ thread->issued_io(io, &m_latest_ios);
+ m_pending_ios[completion] = io;
+ } else if (strcmp(event_name, "librbd:aio_write_enter") == 0 ||
+ strcmp(event_name, "librbd:aio_write2_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ uint64_t offset = fields.uint64("off");
+ uint64_t length = fields.uint64("len");
+ uint64_t completion = fields.uint64("completion");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new AioWriteIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, offset, length));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ m_pending_ios[completion] = io;
+ } else if (strcmp(event_name, "librbd:aio_discard_enter") == 0) {
+ string name(fields.string("name"));
+ string snap_name(fields.string("snap_name"));
+ bool readonly = fields.int64("read_only");
+ uint64_t offset = fields.uint64("off");
+ uint64_t length = fields.uint64("len");
+ uint64_t completion = fields.uint64("completion");
+ imagectx_id_t imagectx = fields.uint64("imagectx");
+ require_image(ts, thread, imagectx, name, snap_name, readonly, ios);
+ action_id_t ionum = next_id();
+ IO::ptr io(new AioDiscardIO(ionum, ts, threadID, m_recent_completions,
+ imagectx, offset, length));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ m_pending_ios[completion] = io;
+ } else if (strcmp(event_name, "librbd:aio_complete_enter") == 0) {
+ uint64_t completion = fields.uint64("completion");
+ map<uint64_t, IO::ptr>::iterator itr = m_pending_ios.find(completion);
+ if (itr != m_pending_ios.end()) {
+ IO::ptr completedIO(itr->second);
+ m_pending_ios.erase(itr);
+ completed(completedIO);
+ }
+ }
+ }
+
+ action_id_t next_id() {
+ action_id_t id = m_io_count;
+ m_io_count += 2;
+ return id;
+ }
+
+ void completed(IO::ptr io) {
+ uint64_t limit = (io->start_time() < m_window ?
+ 0 : io->start_time() - m_window);
+ for (io_set_t::iterator itr = m_recent_completions.begin();
+ itr != m_recent_completions.end(); ) {
+ IO::ptr recent_comp(*itr);
+ if ((recent_comp->start_time() < limit ||
+ io->dependencies().count(recent_comp) != 0) &&
+ m_latest_ios.count(recent_comp) == 0) {
+ m_recent_completions.erase(itr++);
+ } else {
+ ++itr;
+ }
+ }
+ m_recent_completions.insert(io);
+ }
+
+ pair<string, string> map_image_snap(string image_name, string snap_name) {
+ if (!m_anonymize) {
+ return pair<string, string>(image_name, snap_name);
+ }
+ AnonymizedImage& m(m_anonymized_images[image_name]);
+ if (m.image_name() == "") {
+ m.init(image_name, m_anonymized_images.size());
+ }
+ return m.anonymize(snap_name);
+ }
+
+ void require_image(uint64_t ts,
+ Thread::ptr thread,
+ imagectx_id_t imagectx,
+ const string& name,
+ const string& snap_name,
+ bool readonly,
+ IO::ptrs *ios) {
+ ceph_assert(thread);
+ if (m_open_images.count(imagectx) > 0) {
+ return;
+ }
+ action_id_t ionum = next_id();
+ pair<string, string> aname(map_image_snap(name, snap_name));
+ IO::ptr io(new OpenImageIO(ionum, ts - 2, thread->id(),
+ m_recent_completions, imagectx, aname.first,
+ aname.second, readonly));
+ thread->issued_io(io, &m_latest_ios);
+ ios->push_back(io);
+ completed(io);
+ m_open_images.insert(imagectx);
+ }
+
+ uint64_t m_window;
+ map<thread_id_t, Thread::ptr> m_threads;
+ uint32_t m_io_count;
+ io_set_t m_recent_completions;
+ set<imagectx_id_t> m_open_images;
+
+ // keyed by completion
+ map<uint64_t, IO::ptr> m_pending_ios;
+ std::set<IO::ptr> m_latest_ios;
+
+ bool m_anonymize;
+ map<string, AnonymizedImage> m_anonymized_images;
+
+ bool m_verbose;
+};
+
+int main(int argc, char** argv) {
+ vector<string> args;
+ for (int i = 0; i < argc; i++) {
+ args.push_back(string(argv[i]));
+ }
+
+ Processor p;
+ p.run(args);
+}
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