osd: EC optimizations: additional types for EC

Add some extra types required by the EC optimizations code:

raw_shard_id_t is an equivalent type to shard_id_t but is used
for storing raw shards. Strong typing prevents bugs where code
forgets to translate between the two types.

shard_id_map is a mini_flat_map indexed by shard_id_t which will
be used by the EC optimizations I/O path to track updates to
each shard.

shard_id_set is a bitset_set of shard_id_t which is a compact
and fast way of storing a set of shards involved in an EC
operation.

Signed-off-by: Bill Scales <[email protected]>

Author: bill-scales

src/osd/ECTypes.h

@@ -21,16 +21,14 @@ struct ec_align_t {
   uint64_t offset;
   uint64_t size;
   uint32_t flags;
-  friend std::ostream &operator<<(std::ostream &lhs, const ec_align_t &rhs) {
-    return lhs << rhs.offset << ","
-               << rhs.size << ","
-               << rhs.flags;
-  }
   ec_align_t(std::pair<uint64_t, uint64_t> p, uint32_t flags)
     : offset(p.first), size(p.second), flags(flags) {}
   ec_align_t(uint64_t offset, uint64_t size, uint32_t flags)
     : offset(offset), size(size), flags(flags) {}
   bool operator==(const ec_align_t &other) const;
+  void print(std::ostream &os) const {
+    os << offset << "," << size << "," << flags;
+  }
 };
 
 struct raw_shard_id_t {