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#include "crimson/osd/object_context_loader.h"
#include "osd/osd_types_fmt.h"
#include "osd/object_state_fmt.h"
SET_SUBSYS(osd);
namespace crimson::osd {
using crimson::common::local_conf;
template<RWState::State State>
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_head_obc(const hobject_t& oid,
with_obc_func_t&& func)
{
return with_locked_obc<State, true /* track */>(
oid,
[func=std::move(func)](auto obc) {
// The template with_obc_func_t wrapper supports two obcs (head and clone).
// In the 'with_head_obc' case, however, only the head is in use.
// Pass the same head obc twice in order to
// to support the generic with_obc sturcture.
return std::invoke(std::move(func), obc, obc);
});
}
template<RWState::State State>
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_clone_obc(const hobject_t& oid,
with_obc_func_t&& func,
bool resolve_clone)
{
LOG_PREFIX(ObjectContextLoader::with_clone_obc);
assert(!oid.is_head());
return with_head_obc<RWState::RWREAD>(
oid.get_head(),
[FNAME, oid, func=std::move(func), resolve_clone, this]
(auto head, auto) mutable -> load_obc_iertr::future<> {
if (!head->obs.exists) {
ERRORDPP("head doesn't exist for object {}", dpp, head->obs.oi.soid);
return load_obc_iertr::future<>{
crimson::ct_error::enoent::make()
};
}
return this->with_clone_obc_only<State>(std::move(head),
oid,
std::move(func),
resolve_clone);
});
}
template<RWState::State State>
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_clone_obc_only(ObjectContextRef head,
hobject_t clone_oid,
with_obc_func_t&& func,
bool resolve_clone)
{
LOG_PREFIX(ObjectContextLoader::with_clone_obc_only);
DEBUGDPP("{}", dpp, clone_oid);
assert(!clone_oid.is_head());
if (resolve_clone) {
auto resolved_oid = resolve_oid(head->get_head_ss(), clone_oid);
if (!resolved_oid) {
ERRORDPP("clone {} not found", dpp, clone_oid);
return load_obc_iertr::future<>{
crimson::ct_error::enoent::make()
};
}
if (resolved_oid->is_head()) {
// See resolve_oid
return std::move(func)(head, head);
}
clone_oid = *resolved_oid;
}
return with_locked_obc<State, false /* don't track */>(
clone_oid,
[head=std::move(head), func=std::move(func)](auto clone) {
clone->set_clone_ssc(head->ssc);
return std::move(func)(std::move(head), std::move(clone));
});
}
template<RWState::State State>
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_obc(hobject_t oid,
with_obc_func_t&& func,
bool resolve_clone)
{
if (oid.is_head()) {
return with_head_obc<State>(oid, std::move(func));
} else {
return with_clone_obc<State>(oid, std::move(func), resolve_clone);
}
}
template<RWState::State State, bool track, typename Func>
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_locked_obc(const hobject_t& oid,
Func&& func)
{
LOG_PREFIX(ObjectContextLoader::with_locked_obc);
auto [obc, existed] = obc_registry.get_cached_obc(oid);
DEBUGDPP("object {} existed {}",
dpp, obc->get_oid(), existed);
if constexpr (track) {
obc->append_to(obc_set_accessing);
}
if (existed) {
return obc->with_lock<State, IOInterruptCondition>(
[func=std::move(func), obc=ObjectContextRef(obc)] {
return std::invoke(std::move(func), obc);
}
).finally([FNAME, this, obc=ObjectContextRef(obc)] {
DEBUGDPP("released object {}, {}", dpp, obc->get_oid(), obc->obs);
if constexpr (track) {
obc->remove_from(obc_set_accessing);
}
});
} else {
return obc->load_then_with_lock<State> (
[this, obc=ObjectContextRef(obc)] {
return load_obc(obc);
},
[func=std::move(func), obc=ObjectContextRef(obc)] {
return std::invoke(std::move(func), obc);
}
).finally([FNAME, this, obc=ObjectContextRef(obc)] {
DEBUGDPP("released object {}, {}", dpp, obc->get_oid(), obc->obs);
if constexpr (track) {
obc->remove_from(obc_set_accessing);
}
});
}
}
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::load_obc(ObjectContextRef obc)
{
LOG_PREFIX(ObjectContextLoader::load_obc);
return backend.load_metadata(obc->get_oid())
.safe_then_interruptible(
[FNAME, this, obc=std::move(obc)](auto md)
-> load_obc_ertr::future<> {
const hobject_t& oid = md->os.oi.soid;
DEBUGDPP("loaded obs {} for {}", dpp, md->os.oi, oid);
if (oid.is_head()) {
if (!md->ssc) {
ERRORDPP("oid {} missing snapsetcontext", dpp, oid);
return crimson::ct_error::object_corrupted::make();
}
obc->set_head_state(std::move(md->os),
std::move(md->ssc));
} else {
// we load and set the ssc only for head obc.
// For clones, the head's ssc will be referenced later.
// See set_clone_ssc
obc->set_clone_state(std::move(md->os));
}
DEBUGDPP("loaded obc {} for {}", dpp, obc->obs.oi, obc->obs.oi.soid);
return seastar::now();
});
}
ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::reload_obc(ObjectContext& obc) const
{
LOG_PREFIX(ObjectContextLoader::reload_obc);
assert(obc.is_head());
return backend.load_metadata(obc.get_oid())
.safe_then_interruptible<false>(
[FNAME, this, &obc](auto md)-> load_obc_ertr::future<> {
DEBUGDPP("reloaded obs {} for {}", dpp, md->os.oi, obc.get_oid());
if (!md->ssc) {
ERRORDPP("oid {} missing snapsetcontext", dpp, obc.get_oid());
return crimson::ct_error::object_corrupted::make();
}
obc.set_head_state(std::move(md->os), std::move(md->ssc));
return load_obc_ertr::now();
});
}
void ObjectContextLoader::notify_on_change(bool is_primary)
{
LOG_PREFIX(ObjectContextLoader::notify_on_change);
DEBUGDPP("is_primary: {}", dpp, is_primary);
for (auto& obc : obc_set_accessing) {
DEBUGDPP("interrupting obc: {}", dpp, obc.get_oid());
obc.interrupt(::crimson::common::actingset_changed(is_primary));
}
}
// explicitly instantiate the used instantiations
template ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_obc<RWState::RWNONE>(hobject_t,
with_obc_func_t&&,
bool resolve_clone);
template ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_obc<RWState::RWREAD>(hobject_t,
with_obc_func_t&&,
bool resolve_clone);
template ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_obc<RWState::RWWRITE>(hobject_t,
with_obc_func_t&&,
bool resolve_clone);
template ObjectContextLoader::load_obc_iertr::future<>
ObjectContextLoader::with_obc<RWState::RWEXCL>(hobject_t,
with_obc_func_t&&,
bool resolve_clone);
}
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