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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include "crimson/os/seastore/cached_extent.h"
#include "crimson/os/seastore/btree/btree_range_pin.h"
namespace crimson::os::seastore {
class LBAMapping;
using LBAMappingRef = std::unique_ptr<LBAMapping>;
class LogicalCachedExtent;
class LBAMapping : public BtreeNodeMapping<laddr_t, paddr_t> {
public:
LBAMapping(op_context_t<laddr_t> ctx)
: BtreeNodeMapping<laddr_t, paddr_t>(ctx) {}
template <typename... T>
LBAMapping(T&&... t)
: BtreeNodeMapping<laddr_t, paddr_t>(std::forward<T>(t)...)
{
if (!parent->is_pending()) {
this->child_pos = {parent, pos};
}
}
// An lba pin may be indirect, see comments in lba_manager/btree/btree_lba_manager.h
virtual bool is_indirect() const = 0;
virtual laddr_t get_intermediate_key() const = 0;
virtual laddr_t get_intermediate_base() const = 0;
virtual extent_len_t get_intermediate_length() const = 0;
// The start offset of the pin, must be 0 if the pin is not indirect
virtual extent_len_t get_intermediate_offset() const = 0;
virtual get_child_ret_t<LogicalCachedExtent>
get_logical_extent(Transaction &t) = 0;
void link_child(ChildableCachedExtent *c) {
ceph_assert(child_pos);
child_pos->link_child(c);
}
virtual LBAMappingRef refresh_with_pending_parent() = 0;
// For reserved mappings, the return values are
// undefined although it won't crash
virtual bool is_stable() const = 0;
virtual bool is_data_stable() const = 0;
virtual bool is_clone() const = 0;
bool is_zero_reserved() const {
return !get_val().is_real();
}
LBAMappingRef duplicate() const;
virtual ~LBAMapping() {}
protected:
virtual LBAMappingRef _duplicate(op_context_t<laddr_t>) const = 0;
std::optional<child_pos_t> child_pos = std::nullopt;
};
std::ostream &operator<<(std::ostream &out, const LBAMapping &rhs);
using lba_pin_list_t = std::list<LBAMappingRef>;
std::ostream &operator<<(std::ostream &out, const lba_pin_list_t &rhs);
} // namespace crimson::os::seastore
#if FMT_VERSION >= 90000
template <> struct fmt::formatter<crimson::os::seastore::LBAMapping> : fmt::ostream_formatter {};
template <> struct fmt::formatter<crimson::os::seastore::lba_pin_list_t> : fmt::ostream_formatter {};
#endif
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