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crimson/seastore: introduce TransactionManager::read_extent(t, offset)

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Signed-off-by: Yingxin Cheng <yingxin.cheng@intel.com>
This commit is contained in:
Yingxin Cheng 2021-05-31 10:11:01 +08:00
parent 88fd967b78
commit 8b6422b49a
1 changed files with 22 additions and 0 deletions
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22
src/crimson/os/seastore/transaction_manager.h
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@ -214,6 +214,28 @@ public:
});
}
/**
* read_extent
*
* Read extent of type T at offset
*/
template <typename T>
read_extent_ret<T> read_extent(
Transaction &t,
laddr_t offset) {
LOG_PREFIX(TransactionManager::read_extent);
return get_pin(
t, offset
).safe_then([this, FNAME, &t, offset] (auto pin) {
if (!pin->get_paddr().is_real()) {
ERRORT("offset {} got wrong pin {}",
t, offset, *pin);
ceph_assert(0 == "Should be impossible");
}
return this->pin_to_extent<T>(t, std::move(pin));
});
}
/// Obtain mutable copy of extent
LogicalCachedExtentRef get_mutable_extent(Transaction &t, LogicalCachedExtentRef ref) {
LOG_PREFIX(TransactionManager::get_mutable_extent);