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[cache_check] A whole bunch of superblock checks

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This commit is contained in:
Joe Thornber
2013-10-07 15:21:45 +01:00
parent 7cd4728fbf
commit 42fd6b928b
8 changed files with 416 additions and 165 deletions
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161
caching/superblock.h
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@ -7,112 +7,82 @@
//----------------------------------------------------------------
namespace caching {
namespace superblock_detail {
using namespace base;
typedef unsigned char __u8;
unsigned const SPACE_MAP_ROOT_SIZE = 128;
unsigned const CACHE_POLICY_NAME_SIZE = 16;
unsigned const CACHE_POLICY_VERSION_SIZE = 3;
unsigned const SPACE_MAP_ROOT_SIZE = 128;
unsigned const CACHE_POLICY_NAME_SIZE = 16;
unsigned const CACHE_POLICY_VERSION_SIZE = 3;
block_address const SUPERBLOCK_LOCATION = 0;
typedef unsigned char __u8;
struct superblock {
superblock();
struct superblock_disk {
le32 csum;
le32 flags;
le64 blocknr;
uint32_t csum;
uint32_t flags;
uint64_t blocknr;
__u8 uuid[16];
le64 magic;
le32 version;
__u8 uuid[16];
uint64_t magic;
uint32_t version;
__u8 policy_name[CACHE_POLICY_NAME_SIZE];
le32 policy_version[CACHE_POLICY_VERSION_SIZE];
le32 policy_hint_size;
__u8 policy_name[CACHE_POLICY_NAME_SIZE];
uint32_t policy_version[CACHE_POLICY_VERSION_SIZE];
uint32_t policy_hint_size;
__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
le64 mapping_root;
le64 hint_root;
uint64_t mapping_root;
uint64_t hint_root;
le64 discard_root;
le64 discard_block_size;
le64 discard_nr_blocks;
uint64_t discard_root;
uint64_t discard_block_size;
uint64_t discard_nr_blocks;
le32 data_block_size; /* in 512-byte sectors */
le32 metadata_block_size; /* in 512-byte sectors */
le32 cache_blocks;
uint32_t data_block_size; /* in 512-byte sectors */
uint32_t metadata_block_size; /* in 512-byte sectors */
uint32_t cache_blocks;
le32 compat_flags;
le32 compat_ro_flags;
le32 incompat_flags;
uint32_t compat_flags;
uint32_t compat_ro_flags;
uint32_t incompat_flags;
le32 read_hits;
le32 read_misses;
le32 write_hits;
le32 write_misses;
} __attribute__ ((packed));
uint32_t read_hits;
uint32_t read_misses;
uint32_t write_hits;
uint32_t write_misses;
};
struct superblock {
uint32_t csum;
uint32_t flags;
uint64_t blocknr;
//--------------------------------
__u8 uuid[16];
uint64_t magic;
uint32_t version;
__u8 policy_name[CACHE_POLICY_NAME_SIZE];
uint32_t policy_version[CACHE_POLICY_VERSION_SIZE];
uint32_t policy_hint_size;
__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
uint64_t mapping_root;
uint64_t hint_root;
uint64_t discard_root;
uint64_t discard_block_size;
uint64_t discard_nr_blocks;
uint32_t data_block_size; /* in 512-byte sectors */
uint32_t metadata_block_size; /* in 512-byte sectors */
uint32_t cache_blocks;
uint32_t compat_flags;
uint32_t compat_ro_flags;
uint32_t incompat_flags;
uint32_t read_hits;
uint32_t read_misses;
uint32_t write_hits;
uint32_t write_misses;
};
struct superblock_traits {
typedef superblock_disk disk_type;
typedef superblock value_type;
static void unpack(superblock_disk const &disk, superblock &value);
static void pack(superblock const &value, superblock_disk &disk);
};
block_address const SUPERBLOCK_LOCATION = 0;
uint32_t const SUPERBLOCK_MAGIC = 06142003;
//--------------------------------
namespace superblock_damage {
class damage_visitor;
struct damage {
class damage {
public:
damage(std::string const &desc)
: desc_(desc) {
}
virtual ~damage() {}
virtual void visit(damage_visitor &v) const = 0;
std::string const &get_desc() const {
return desc_;
}
private:
std::string desc_;
};
struct superblock_corruption : public damage {
superblock_corruption(std::string const &desc);
struct superblock_corrupt : public damage {
superblock_corrupt(std::string const &desc);
void visit(damage_visitor &v) const;
};
std::string desc_;
struct superblock_invalid : public damage {
superblock_invalid(std::string const &desc);
void visit(damage_visitor &v) const;
};
class damage_visitor {
@ -121,24 +91,29 @@ namespace caching {
void visit(damage const &d);
virtual void visit(superblock_corruption const &d) = 0;
virtual void visit(superblock_corrupt const &d) = 0;
virtual void visit(superblock_invalid const &d) = 0;
};
}
//--------------------------------
persistent_data::block_manager<>::validator::ptr superblock_validator();
superblock_detail::superblock read_superblock(persistent_data::block_manager<>::ptr bm);
superblock_detail::superblock read_superblock(persistent_data::block_manager<>::ptr bm,
persistent_data::block_address location);
superblock read_superblock(persistent_data::block_manager<>::ptr bm,
persistent_data::block_address location = SUPERBLOCK_LOCATION);
void write_superblock(persistent_data::block_manager<>::ptr bm,
superblock_detail::superblock const &sb);
void write_superblock(persistent_data::block_manager<>::ptr bm,
persistent_data::block_address location,
superblock_detail::superblock const &sb);
superblock const &sb,
persistent_data::block_address location = SUPERBLOCK_LOCATION);
void check_superblock(superblock const &sb,
persistent_data::block_address nr_metadata_blocks,
superblock_damage::damage_visitor &visitor);
void check_superblock(persistent_data::block_manager<>::ptr bm,
superblock_detail::damage_visitor &visitor);
persistent_data::block_address nr_metadata_blocks,
superblock_damage::damage_visitor &visitor);
}
//----------------------------------------------------------------