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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /src/mds/LogEvent.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/mds/LogEvent.h')
-rw-r--r-- | src/mds/LogEvent.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/mds/LogEvent.h b/src/mds/LogEvent.h new file mode 100644 index 00000000..7c7273f8 --- /dev/null +++ b/src/mds/LogEvent.h @@ -0,0 +1,132 @@ +// -*- 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) 2004-2006 Sage Weil <sage@newdream.net> + * + * 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. + * + */ + +#ifndef CEPH_LOGEVENT_H +#define CEPH_LOGEVENT_H + +#define EVENT_NEW_ENCODING 0 // indicates that the encoding is versioned +#define EVENT_UNUSED 1 // was previously EVENT_STRING + +#define EVENT_SUBTREEMAP 2 +#define EVENT_EXPORT 3 +#define EVENT_IMPORTSTART 4 +#define EVENT_IMPORTFINISH 5 +#define EVENT_FRAGMENT 6 + +#define EVENT_RESETJOURNAL 9 + +#define EVENT_SESSION 10 +#define EVENT_SESSIONS_OLD 11 +#define EVENT_SESSIONS 12 + +#define EVENT_UPDATE 20 +#define EVENT_SLAVEUPDATE 21 +#define EVENT_OPEN 22 +#define EVENT_COMMITTED 23 + +#define EVENT_TABLECLIENT 42 +#define EVENT_TABLESERVER 43 + +#define EVENT_SUBTREEMAP_TEST 50 +#define EVENT_NOOP 51 + + +#include "include/buffer_fwd.h" +#include "include/Context.h" +#include "include/utime.h" + +class MDSRank; +class LogSegment; +class EMetaBlob; + +// generic log event +class LogEvent { +public: + friend class MDLog; + typedef __u32 EventType; + + LogEvent() = delete; + explicit LogEvent(int t) : _type(t) {} + LogEvent(const LogEvent&) = delete; + LogEvent& operator=(const LogEvent&) = delete; + virtual ~LogEvent() {} + + std::string_view get_type_str() const; + static EventType str_to_type(std::string_view str); + EventType get_type() const { return _type; } + void set_type(EventType t) { _type = t; } + + uint64_t get_start_off() const { return _start_off; } + void set_start_off(uint64_t o) { _start_off = o; } + + utime_t get_stamp() const { return stamp; } + void set_stamp(utime_t t) { stamp = t; } + + // encoding + virtual void encode(bufferlist& bl, uint64_t features) const = 0; + virtual void decode(bufferlist::const_iterator &) = 0; + static std::unique_ptr<LogEvent> decode_event(bufferlist::const_iterator); + virtual void dump(Formatter *f) const = 0; + + void encode_with_header(bufferlist& bl, uint64_t features) { + using ceph::encode; + encode(EVENT_NEW_ENCODING, bl); + ENCODE_START(1, 1, bl) + encode(_type, bl); + this->encode(bl, features); + ENCODE_FINISH(bl); + } + + virtual void print(ostream& out) const { + out << "event(" << _type << ")"; + } + + /*** live journal ***/ + /* update_segment() - adjust any state we need to in the LogSegment + */ + virtual void update_segment() { } + + /*** recovery ***/ + /* replay() - replay given event. this is idempotent. + */ + virtual void replay(MDSRank *m) { ceph_abort(); } + + /** + * If the subclass embeds a MetaBlob, return it here so that + * tools can examine metablobs while traversing lists of LogEvent. + */ + virtual EMetaBlob *get_metablob() { return NULL; } + +protected: + utime_t stamp; + + LogSegment* get_segment() { return _segment; } + LogSegment const* get_segment() const { return _segment; } + +private: + static const std::map<std::string, LogEvent::EventType> types; + + static std::unique_ptr<LogEvent> decode_event(bufferlist::const_iterator&, EventType); + + EventType _type = 0; + uint64_t _start_off = 0; + LogSegment *_segment = nullptr; +}; + +inline ostream& operator<<(ostream& out, const LogEvent &le) { + le.print(out); + return out; +} + +#endif |