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[caching] introduce superblock_flags class

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This commit is contained in:
Joe Thornber
2013-10-11 13:32:57 +01:00
parent 764ee0b0c5
commit d2e81a0a19
2 changed files with 76 additions and 6 deletions
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27
caching/superblock.h
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@ -4,6 +4,8 @@
#include "persistent-data/endian_utils.h"
#include "persistent-data/data-structures/btree.h"
#include <set>
//----------------------------------------------------------------
namespace caching {
@ -14,11 +16,34 @@ namespace caching {
unsigned const CACHE_POLICY_VERSION_SIZE = 3;
block_address const SUPERBLOCK_LOCATION = 0;
class superblock_flags {
public:
enum flag {
CLEAN_SHUTDOWN
};
enum flag_bits {
CLEAN_SHUTDOWN_BIT = 0
};
superblock_flags();
superblock_flags(uint32_t bits);
void set_flag(flag f);
bool get_flag(flag f) const;
uint32_t encode() const;
uint32_t get_unhandled_flags() const;
private:
uint32_t unhandled_flags_;
std::set<flag> flags_;
};
struct superblock {
superblock();
uint32_t csum;
uint32_t flags;
superblock_flags flags;
uint64_t blocknr;
__u8 uuid[16];