caching/superblock.{h,cc}
This commit is contained in:
Joe Thornber
parent
500e508c6d
commit
1e925d4cf1
@ -48,7 +48,7 @@ PDATA_SOURCE=\
|
||||
SOURCE=\
|
||||
$(PDATA_SOURCE) \
|
||||
\
|
||||
cache/metadata_disk_structures.cc \
|
||||
caching/superblock.cc \
|
||||
\
|
||||
thin-provisioning/device_tree.cc \
|
||||
thin-provisioning/file_utils.cc \
|
||||
@ -66,7 +66,7 @@ SOURCE=\
|
||||
PDATA_OBJECTS=$(subst .cc,.o,$(SOURCE))
|
||||
|
||||
CXX_PROGRAM_SOURCE=\
|
||||
cache/check.cc \
|
||||
caching/check.cc \
|
||||
\
|
||||
thin-provisioning/thin_check.cc \
|
||||
thin-provisioning/thin_dump.cc \
|
||||
@ -228,11 +228,11 @@ CACHE_CHECK_SOURCE=\
|
||||
persistent-data/space-maps/recursive.cc \
|
||||
persistent-data/space-maps/careful_alloc.cc \
|
||||
persistent-data/transaction_manager.cc \
|
||||
cache/metadata_disk_structures.cc
|
||||
caching/superblock.cc
|
||||
|
||||
CACHE_CHECK_OBJECTS=$(subst .cc,.o,$(CACHE_CHECK_SOURCE))
|
||||
|
||||
cache_check: $(CACHE_CHECK_OBJECTS) cache/check.o
|
||||
cache_check: $(CACHE_CHECK_OBJECTS) caching/check.o
|
||||
@echo " [LD] $@"
|
||||
$(V) $(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $+ $(LIBS)
|
||||
|
||||
|
||||
120
cache/metadata_disk_structures.h
vendored
120
cache/metadata_disk_structures.h
vendored
@ -1,120 +0,0 @@
|
||||
// Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
||||
//
|
||||
// This file is part of the thin-provisioning-tools source.
|
||||
//
|
||||
// thin-provisioning-tools is free software: you can redistribute it
|
||||
// and/or modify it under the terms of the GNU General Public License
|
||||
// as published by the Free Software Foundation, either version 3 of
|
||||
// the License, or (at your option) any later version.
|
||||
//
|
||||
// thin-provisioning-tools is distributed in the hope that it will be
|
||||
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
||||
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with thin-provisioning-tools. If not, see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
#ifndef CACHE_METADATA_DISK_STRUCTURES_H
|
||||
#define CACHE_METADATA_DISK_STRUCTURES_H
|
||||
|
||||
#include "persistent-data/endian_utils.h"
|
||||
#include "persistent-data/data-structures/btree.h"
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
// FIXME: rename to just METADATA_DISK_STRUCTURES
|
||||
namespace cache_tools {
|
||||
using namespace base; // FIXME: don't use namespaces in headers.
|
||||
|
||||
unsigned const SPACE_MAP_ROOT_SIZE = 128;
|
||||
unsigned const CACHE_POLICY_NAME_SIZE = 16;
|
||||
unsigned const CACHE_POLICY_VERSION_SIZE = 3;
|
||||
|
||||
typedef unsigned char __u8;
|
||||
|
||||
struct superblock_disk {
|
||||
le32 csum;
|
||||
le32 flags;
|
||||
le64 blocknr;
|
||||
|
||||
__u8 uuid[16];
|
||||
le64 magic;
|
||||
le32 version;
|
||||
|
||||
__u8 policy_name[CACHE_POLICY_NAME_SIZE];
|
||||
le32 policy_version[CACHE_POLICY_VERSION_SIZE];
|
||||
le32 policy_hint_size;
|
||||
|
||||
__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
|
||||
|
||||
le64 mapping_root;
|
||||
le64 hint_root;
|
||||
|
||||
le64 discard_root;
|
||||
le64 discard_block_size;
|
||||
le64 discard_nr_blocks;
|
||||
|
||||
le32 data_block_size; /* in 512-byte sectors */
|
||||
le32 metadata_block_size; /* in 512-byte sectors */
|
||||
le32 cache_blocks;
|
||||
|
||||
le32 compat_flags;
|
||||
le32 compat_ro_flags;
|
||||
le32 incompat_flags;
|
||||
|
||||
le32 read_hits;
|
||||
le32 read_misses;
|
||||
le32 write_hits;
|
||||
le32 write_misses;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
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);
|
||||
};
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
#endif
|
||||
28
caching/metadata_disk_structures.cc
Normal file
28
caching/metadata_disk_structures.cc
Normal file
@ -0,0 +1,28 @@
|
||||
// Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
||||
//
|
||||
// This file is part of the thin-provisioning-tools source.
|
||||
//
|
||||
// thin-provisioning-tools is free software: you can redistribute it
|
||||
// and/or modify it under the terms of the GNU General Public License
|
||||
// as published by the Free Software Foundation, either version 3 of
|
||||
// the License, or (at your option) any later version.
|
||||
//
|
||||
// thin-provisioning-tools is distributed in the hope that it will be
|
||||
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
||||
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with thin-provisioning-tools. If not, see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
#include "metadata_disk_structures.h"
|
||||
|
||||
#include <string.h>
|
||||
|
||||
using namespace cache_tools;
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
|
||||
//----------------------------------------------------------------
|
||||
35
caching/metadata_disk_structures.h
Normal file
35
caching/metadata_disk_structures.h
Normal file
@ -0,0 +1,35 @@
|
||||
// Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
||||
//
|
||||
// This file is part of the thin-provisioning-tools source.
|
||||
//
|
||||
// thin-provisioning-tools is free software: you can redistribute it
|
||||
// and/or modify it under the terms of the GNU General Public License
|
||||
// as published by the Free Software Foundation, either version 3 of
|
||||
// the License, or (at your option) any later version.
|
||||
//
|
||||
// thin-provisioning-tools is distributed in the hope that it will be
|
||||
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
||||
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with thin-provisioning-tools. If not, see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
|
||||
#ifndef CACHE_METADATA_DISK_STRUCTURES_H
|
||||
#define CACHE_METADATA_DISK_STRUCTURES_H
|
||||
|
||||
#include "persistent-data/endian_utils.h"
|
||||
#include "persistent-data/data-structures/btree.h"
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
// FIXME: rename to just METADATA_DISK_STRUCTURES
|
||||
namespace cache_tools {
|
||||
using namespace base; // FIXME: don't use namespaces in headers.
|
||||
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
#endif
|
||||
@ -1,26 +1,7 @@
|
||||
// Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
||||
//
|
||||
// This file is part of the thin-provisioning-tools source.
|
||||
//
|
||||
// thin-provisioning-tools is free software: you can redistribute it
|
||||
// and/or modify it under the terms of the GNU General Public License
|
||||
// as published by the Free Software Foundation, either version 3 of
|
||||
// the License, or (at your option) any later version.
|
||||
//
|
||||
// thin-provisioning-tools is distributed in the hope that it will be
|
||||
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
||||
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with thin-provisioning-tools. If not, see
|
||||
// <http://www.gnu.org/licenses/>.
|
||||
#include "caching/superblock.h"
|
||||
|
||||
#include "metadata_disk_structures.h"
|
||||
|
||||
#include <string.h>
|
||||
|
||||
using namespace cache_tools;
|
||||
using namespace caching;
|
||||
using namespace superblock_detail;
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
@ -110,4 +91,87 @@ superblock_traits::pack(superblock const &core, superblock_disk &disk)
|
||||
disk.write_misses = to_disk<le32>(core.write_misses);
|
||||
}
|
||||
|
||||
//--------------------------------
|
||||
|
||||
superblock_corruption::superblock_corruption(std::string const &desc)
|
||||
: desc_(desc)
|
||||
{
|
||||
}
|
||||
|
||||
void
|
||||
superblock_corruption::visit(damage_visitor &v) const
|
||||
{
|
||||
v.visit(*this);
|
||||
}
|
||||
|
||||
//--------------------------------
|
||||
|
||||
namespace {
|
||||
using namespace persistent_data;
|
||||
using namespace superblock_detail;
|
||||
|
||||
uint32_t const VERSION = 1;
|
||||
unsigned const SECTOR_TO_BLOCK_SHIFT = 3;
|
||||
uint32_t const SUPERBLOCK_CSUM_SEED = 9031977;
|
||||
|
||||
struct sb_validator : public block_manager<>::validator {
|
||||
virtual void check(buffer<> const &b, block_address location) const {
|
||||
superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&b);
|
||||
crc32c sum(SUPERBLOCK_CSUM_SEED);
|
||||
sum.append(&sbd->flags, MD_BLOCK_SIZE - sizeof(uint32_t));
|
||||
if (sum.get_sum() != to_cpu<uint32_t>(sbd->csum))
|
||||
throw checksum_error("bad checksum in superblock");
|
||||
}
|
||||
|
||||
virtual void prepare(buffer<> &b, block_address location) const {
|
||||
superblock_disk *sbd = reinterpret_cast<superblock_disk *>(&b);
|
||||
crc32c sum(SUPERBLOCK_CSUM_SEED);
|
||||
sum.append(&sbd->flags, MD_BLOCK_SIZE - sizeof(uint32_t));
|
||||
sbd->csum = to_disk<base::le32>(sum.get_sum());
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
persistent_data::block_manager<>::validator::ptr
|
||||
caching::superblock_validator()
|
||||
{
|
||||
return block_manager<>::validator::ptr(new sb_validator);
|
||||
}
|
||||
|
||||
//--------------------------------
|
||||
|
||||
superblock_detail::superblock
|
||||
caching::read_superblock(persistent_data::block_manager<>::ptr bm,
|
||||
persistent_data::block_address location)
|
||||
{
|
||||
using namespace superblock_detail;
|
||||
|
||||
superblock sb;
|
||||
block_manager<>::read_ref r = bm->read_lock(location, superblock_validator());
|
||||
superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data());
|
||||
superblock_traits::unpack(*sbd, sb);
|
||||
|
||||
return sb;
|
||||
}
|
||||
|
||||
superblock_detail::superblock
|
||||
caching::read_superblock(persistent_data::block_manager<>::ptr bm)
|
||||
{
|
||||
return read_superblock(bm, SUPERBLOCK_LOCATION);
|
||||
}
|
||||
|
||||
void
|
||||
caching::check_superblock(persistent_data::block_manager<>::ptr bm,
|
||||
superblock_detail::damage_visitor &visitor)
|
||||
{
|
||||
using namespace superblock_detail;
|
||||
|
||||
try {
|
||||
bm->read_lock(SUPERBLOCK_LOCATION, superblock_validator());
|
||||
|
||||
} catch (std::exception const &e) {
|
||||
visitor.visit(superblock_corruption(e.what()));
|
||||
}
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
139
caching/superblock.h
Normal file
139
caching/superblock.h
Normal file
@ -0,0 +1,139 @@
|
||||
#ifndef CACHE_SUPERBLOCK_H
|
||||
#define CACHE_SUPERBLOCK_H
|
||||
|
||||
#include "persistent-data/endian_utils.h"
|
||||
#include "persistent-data/data-structures/btree.h"
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
namespace caching {
|
||||
namespace superblock_detail {
|
||||
using namespace base;
|
||||
|
||||
unsigned const SPACE_MAP_ROOT_SIZE = 128;
|
||||
unsigned const CACHE_POLICY_NAME_SIZE = 16;
|
||||
unsigned const CACHE_POLICY_VERSION_SIZE = 3;
|
||||
|
||||
typedef unsigned char __u8;
|
||||
|
||||
struct superblock_disk {
|
||||
le32 csum;
|
||||
le32 flags;
|
||||
le64 blocknr;
|
||||
|
||||
__u8 uuid[16];
|
||||
le64 magic;
|
||||
le32 version;
|
||||
|
||||
__u8 policy_name[CACHE_POLICY_NAME_SIZE];
|
||||
le32 policy_version[CACHE_POLICY_VERSION_SIZE];
|
||||
le32 policy_hint_size;
|
||||
|
||||
__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
|
||||
|
||||
le64 mapping_root;
|
||||
le64 hint_root;
|
||||
|
||||
le64 discard_root;
|
||||
le64 discard_block_size;
|
||||
le64 discard_nr_blocks;
|
||||
|
||||
le32 data_block_size; /* in 512-byte sectors */
|
||||
le32 metadata_block_size; /* in 512-byte sectors */
|
||||
le32 cache_blocks;
|
||||
|
||||
le32 compat_flags;
|
||||
le32 compat_ro_flags;
|
||||
le32 incompat_flags;
|
||||
|
||||
le32 read_hits;
|
||||
le32 read_misses;
|
||||
le32 write_hits;
|
||||
le32 write_misses;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
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;
|
||||
|
||||
//--------------------------------
|
||||
|
||||
class damage_visitor;
|
||||
|
||||
struct damage {
|
||||
virtual ~damage() {}
|
||||
virtual void visit(damage_visitor &v) const = 0;
|
||||
};
|
||||
|
||||
struct superblock_corruption : public damage {
|
||||
superblock_corruption(std::string const &desc);
|
||||
void visit(damage_visitor &v) const;
|
||||
|
||||
std::string desc_;
|
||||
};
|
||||
|
||||
class damage_visitor {
|
||||
public:
|
||||
virtual ~damage_visitor() {}
|
||||
|
||||
void visit(damage const &d);
|
||||
|
||||
virtual void visit(superblock_corruption 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);
|
||||
void check_superblock(persistent_data::block_manager<>::ptr bm,
|
||||
superblock_detail::damage_visitor &visitor);
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user