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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_CLS_LOCK_TYPES_H
#define CEPH_CLS_LOCK_TYPES_H
#include "include/encoding.h"
#include "include/types.h"
#include "include/utime.h"
#include "msg/msg_types.h"
/* lock flags */
#define LOCK_FLAG_MAY_RENEW 0x1 /* idempotent lock acquire */
#define LOCK_FLAG_MUST_RENEW 0x2 /* lock must already be acquired */
enum class ClsLockType {
NONE = 0,
EXCLUSIVE = 1,
SHARED = 2,
EXCLUSIVE_EPHEMERAL = 3, /* lock object is removed @ unlock */
};
inline const char *cls_lock_type_str(ClsLockType type)
{
switch (type) {
case ClsLockType::NONE:
return "none";
case ClsLockType::EXCLUSIVE:
return "exclusive";
case ClsLockType::SHARED:
return "shared";
case ClsLockType::EXCLUSIVE_EPHEMERAL:
return "exclusive-ephemeral";
default:
return "<unknown>";
}
}
inline bool cls_lock_is_exclusive(ClsLockType type) {
return ClsLockType::EXCLUSIVE == type || ClsLockType::EXCLUSIVE_EPHEMERAL == type;
}
inline bool cls_lock_is_ephemeral(ClsLockType type) {
return ClsLockType::EXCLUSIVE_EPHEMERAL == type;
}
inline bool cls_lock_is_valid(ClsLockType type) {
return ClsLockType::SHARED == type ||
ClsLockType::EXCLUSIVE == type ||
ClsLockType::EXCLUSIVE_EPHEMERAL == type;
}
namespace rados {
namespace cls {
namespace lock {
/*
* locker_id_t: the locker id, needs to be unique in a single lock
*/
struct locker_id_t {
entity_name_t locker; // locker's client name
std::string cookie; // locker's cookie.
locker_id_t() {}
locker_id_t(entity_name_t& _n, const std::string& _c) : locker(_n), cookie(_c) {}
void encode(ceph::buffer::list &bl) const {
ENCODE_START(1, 1, bl);
encode(locker, bl);
encode(cookie, bl);
ENCODE_FINISH(bl);
}
void decode(ceph::buffer::list::const_iterator &bl) {
DECODE_START_LEGACY_COMPAT_LEN(1, 1, 1, bl);
decode(locker, bl);
decode(cookie, bl);
DECODE_FINISH(bl);
}
bool operator<(const locker_id_t& rhs) const {
if (locker == rhs.locker)
return cookie.compare(rhs.cookie) < 0;
if (locker < rhs.locker)
return true;
return false;
}
void dump(ceph::Formatter *f) const;
friend std::ostream& operator<<(std::ostream& out,
const locker_id_t& data) {
out << data.locker;
return out;
}
static void generate_test_instances(std::list<locker_id_t*>& o);
};
WRITE_CLASS_ENCODER(locker_id_t)
struct locker_info_t
{
utime_t expiration; // expiration: non-zero means epoch of locker expiration
entity_addr_t addr; // addr: locker address
std::string description; // description: locker description, may be empty
locker_info_t() {}
locker_info_t(const utime_t& _e, const entity_addr_t& _a,
const std::string& _d) : expiration(_e), addr(_a), description(_d) {}
void encode(ceph::buffer::list &bl, uint64_t features) const {
ENCODE_START(1, 1, bl);
encode(expiration, bl);
encode(addr, bl, features);
encode(description, bl);
ENCODE_FINISH(bl);
}
void decode(ceph::buffer::list::const_iterator &bl) {
DECODE_START_LEGACY_COMPAT_LEN(1, 1, 1, bl);
decode(expiration, bl);
decode(addr, bl);
decode(description, bl);
DECODE_FINISH(bl);
}
void dump(ceph::Formatter *f) const;
friend std::ostream& operator<<(std::ostream& out,
const locker_info_t& data) {
using ceph::operator <<;
out << "{addr:" << data.addr << ", exp:";
const auto& exp = data.expiration;
if (exp.is_zero()) {
out << "never}";
} else {
out << exp.to_real_time() << "}";
}
return out;
}
static void generate_test_instances(std::list<locker_info_t *>& o);
};
WRITE_CLASS_ENCODER_FEATURES(locker_info_t)
struct lock_info_t {
std::map<locker_id_t, locker_info_t> lockers; // map of lockers
ClsLockType lock_type; // lock type (exclusive / shared)
std::string tag; // tag: operations on lock can only succeed with this tag
// as long as set of non expired lockers
// is bigger than 0.
void encode(ceph::buffer::list &bl, uint64_t features) const {
ENCODE_START(1, 1, bl);
encode(lockers, bl, features);
uint8_t t = (uint8_t)lock_type;
encode(t, bl);
encode(tag, bl);
ENCODE_FINISH(bl);
}
void decode(ceph::buffer::list::const_iterator &bl) {
DECODE_START_LEGACY_COMPAT_LEN(1, 1, 1, bl);
decode(lockers, bl);
uint8_t t;
decode(t, bl);
lock_type = (ClsLockType)t;
decode(tag, bl);
DECODE_FINISH(bl);
}
lock_info_t() : lock_type(ClsLockType::NONE) {}
void dump(ceph::Formatter *f) const;
static void generate_test_instances(std::list<lock_info_t *>& o);
};
WRITE_CLASS_ENCODER_FEATURES(lock_info_t);
}
}
}
#endif
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