[cache_check] A whole bunch of superblock checks
This commit is contained in:
Joe Thornber
parent
7cd4728fbf
commit
42fd6b928b
@ -58,17 +58,27 @@ namespace {
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error_state err_;
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};
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class superblock_reporter : public superblock_detail::damage_visitor, reporter_base {
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class superblock_reporter : public superblock_damage::damage_visitor, reporter_base {
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public:
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superblock_reporter(nested_output &o)
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: reporter_base(o) {
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}
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virtual void visit(superblock_detail::superblock_corruption const &d) {
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virtual void visit(superblock_damage::superblock_corrupt const &d) {
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out() << "superblock is corrupt" << end_message();
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{
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nested_output::nest _ = push();
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out() << d.desc_ << end_message();
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out() << d.get_desc() << end_message();
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}
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mplus_error(FATAL);
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}
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virtual void visit(superblock_damage::superblock_invalid const &d) {
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out() << "superblock is invalid" << end_message();
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{
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nested_output::nest _ = push();
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out() << d.get_desc() << end_message();
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}
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mplus_error(FATAL);
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@ -95,7 +105,7 @@ namespace {
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transaction_manager::ptr open_tm(block_manager<>::ptr bm) {
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space_map::ptr sm(new core_map(bm->get_nr_blocks()));
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sm->inc(superblock_detail::SUPERBLOCK_LOCATION);
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sm->inc(SUPERBLOCK_LOCATION);
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transaction_manager::ptr tm(new transaction_manager(bm, sm));
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return tm;
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}
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@ -146,13 +156,13 @@ namespace {
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out << "examining superblock" << end_message();
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{
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nested_output::nest _ = out.push();
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check_superblock(bm, sb_rep);
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check_superblock(bm, bm->get_nr_blocks(), sb_rep);
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}
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if (sb_rep.get_error() == FATAL)
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return FATAL;
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superblock_detail::superblock sb = read_superblock(bm);
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superblock sb = read_superblock(bm);
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transaction_manager::ptr tm = open_tm(bm);
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if (fs.check_mappings_) {
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@ -7,8 +7,6 @@ using namespace caching;
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//----------------------------------------------------------------
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namespace {
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using namespace superblock_detail;
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unsigned const METADATA_CACHE_SIZE = 1024;
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// FIXME: duplication
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@ -133,9 +131,7 @@ metadata::commit_hints()
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void
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metadata::commit_superblock()
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{
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write_ref superblock = tm_->get_bm()->superblock_zero(SUPERBLOCK_LOCATION, superblock_validator());
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superblock_disk *disk = reinterpret_cast<superblock_disk *>(superblock.data().raw());
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superblock_traits::pack(sb_, *disk);
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write_superblock(tm_->get_bm(), sb_);
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}
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//----------------------------------------------------------------
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@ -33,7 +33,7 @@ namespace caching {
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typedef persistent_data::transaction_manager tm;
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tm::ptr tm_;
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superblock_detail::superblock sb_;
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superblock sb_;
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checked_space_map::ptr metadata_sm_;
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mapping_array::ptr mappings_;
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hint_array::ptr hints_;
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@ -5,7 +5,7 @@
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using namespace caching;
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using namespace mapping_array_detail;
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using namespace std;
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using namespace superblock_detail;
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using namespace superblock_damage;
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//----------------------------------------------------------------
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@ -27,38 +27,14 @@ namespace {
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size_t hint_width) {
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superblock &sb = md_->sb_;
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sb.flags = 0;
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memset(sb.uuid, 0, sizeof(sb.uuid));
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sb.magic = caching::superblock_detail::SUPERBLOCK_MAGIC;
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sb.version = 0; // FIXME: fix
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strncpy((char *) sb.policy_name, policy.c_str(), sizeof(sb.policy_name));
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memset(sb.policy_version, 0, sizeof(sb.policy_version));
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memset(sb.policy_version, 0, sizeof(sb.policy_version)); // FIXME: should come from xml
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sb.policy_hint_size = hint_width;
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md_->setup_hint_array(hint_width);
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memset(sb.metadata_space_map_root, 0,
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sizeof(sb.metadata_space_map_root));
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sb.mapping_root = 0;
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sb.hint_root = 0;
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sb.discard_root = 0;
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sb.discard_block_size = 0;
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sb.discard_nr_blocks = 0;
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sb.data_block_size = block_size;
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sb.metadata_block_size = 0;
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sb.cache_blocks = nr_cache_blocks;
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sb.compat_flags = 0;
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sb.compat_ro_flags = 0;
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sb.incompat_flags = 0;
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sb.read_hits = 0;
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sb.read_misses = 0;
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sb.write_hits = 0;
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sb.write_misses = 0;
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struct mapping unmapped_value;
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unmapped_value.oblock_ = 0;
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unmapped_value.flags_ = 0;
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@ -1,7 +1,92 @@
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#include "caching/superblock.h"
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using namespace caching;
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using namespace superblock_detail;
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using namespace superblock_damage;
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//----------------------------------------------------------------
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namespace {
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using namespace base;
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struct superblock_disk {
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le32 csum;
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le32 flags;
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le64 blocknr;
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__u8 uuid[16];
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le64 magic;
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le32 version;
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__u8 policy_name[CACHE_POLICY_NAME_SIZE];
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le32 policy_version[CACHE_POLICY_VERSION_SIZE];
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le32 policy_hint_size;
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__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
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le64 mapping_root;
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le64 hint_root;
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le64 discard_root;
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le64 discard_block_size;
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le64 discard_nr_blocks;
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le32 data_block_size; /* in 512-byte sectors */
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le32 metadata_block_size; /* in 512-byte sectors */
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le32 cache_blocks;
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le32 compat_flags;
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le32 compat_ro_flags;
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le32 incompat_flags;
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le32 read_hits;
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le32 read_misses;
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le32 write_hits;
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le32 write_misses;
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} __attribute__ ((packed));
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struct superblock_traits {
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typedef superblock_disk disk_type;
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typedef superblock value_type;
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static void unpack(superblock_disk const &disk, superblock &value);
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static void pack(superblock const &value, superblock_disk &disk);
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};
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uint32_t const SUPERBLOCK_MAGIC = 06142003;
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uint32_t const VERSION_BEGIN = 1;
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uint32_t const VERSION_END = 2;
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}
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//----------------------------------------------------------------
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superblock::superblock()
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: csum(0),
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flags(0),
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blocknr(SUPERBLOCK_LOCATION),
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magic(SUPERBLOCK_MAGIC),
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version(VERSION_BEGIN),
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policy_hint_size(0),
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mapping_root(0),
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hint_root(0),
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discard_root(0),
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discard_block_size(0),
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discard_nr_blocks(0),
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data_block_size(0),
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metadata_block_size(8),
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cache_blocks(0),
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compat_flags(0),
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compat_ro_flags(0),
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incompat_flags(0),
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read_hits(0),
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read_misses(0),
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write_hits(0),
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write_misses(0)
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{
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::memset(uuid, 0, sizeof(uuid));
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::memset(policy_name, 0, sizeof(policy_name));
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::memset(policy_version, 0, sizeof(policy_version));
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::memset(metadata_space_map_root, 0, sizeof(metadata_space_map_root));
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}
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//----------------------------------------------------------------
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@ -94,22 +179,33 @@ superblock_traits::pack(superblock const &core, superblock_disk &disk)
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//--------------------------------
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superblock_corruption::superblock_corruption(std::string const &desc)
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: desc_(desc)
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superblock_corrupt::superblock_corrupt(std::string const &desc)
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: damage(desc)
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{
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}
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void
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superblock_corruption::visit(damage_visitor &v) const
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superblock_corrupt::visit(damage_visitor &v) const
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{
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v.visit(*this);
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}
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superblock_invalid::superblock_invalid(std::string const &desc)
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: damage(desc)
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{
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}
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void
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superblock_invalid::visit(damage_visitor &v) const
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{
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v.visit(*this);
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}
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//--------------------------------
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namespace {
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// anonymous namespace doesn't work for some reason
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namespace validator {
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using namespace persistent_data;
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using namespace superblock_detail;
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uint32_t const VERSION = 1;
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unsigned const SECTOR_TO_BLOCK_SHIFT = 3;
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@ -131,65 +227,122 @@ namespace {
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sbd->csum = to_disk<base::le32>(sum.get_sum());
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}
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};
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}
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persistent_data::block_manager<>::validator::ptr
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caching::superblock_validator()
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{
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block_manager<>::validator::ptr mk_v() {
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return block_manager<>::validator::ptr(new sb_validator);
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}
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}
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//--------------------------------
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superblock_detail::superblock
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superblock
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caching::read_superblock(block_manager<>::ptr bm, block_address location)
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{
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using namespace superblock_detail;
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superblock sb;
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block_manager<>::read_ref r = bm->read_lock(location, superblock_validator());
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block_manager<>::read_ref r = bm->read_lock(location, validator::mk_v());
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superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data());
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superblock_traits::unpack(*sbd, sb);
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return sb;
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}
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superblock_detail::superblock
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caching::read_superblock(persistent_data::block_manager<>::ptr bm)
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void
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caching::write_superblock(block_manager<>::ptr bm, superblock const &sb, block_address location)
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{
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return read_superblock(bm, SUPERBLOCK_LOCATION);
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block_manager<>::write_ref w = bm->superblock_zero(location, validator::mk_v());
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superblock_traits::pack(sb, *reinterpret_cast<superblock_disk *>(w.data().raw()));
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}
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void
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caching::write_superblock(block_manager<>::ptr bm,
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block_address location,
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superblock_detail::superblock const &sb)
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caching::check_superblock(superblock const &sb,
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block_address nr_metadata_blocks,
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damage_visitor &visitor)
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{
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using namespace superblock_detail;
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block_manager<>::write_ref w = bm->write_lock(location, superblock_validator());
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superblock_traits::pack(sb, *reinterpret_cast<superblock_disk *>(&w.data()));
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if (sb.flags != 0) {
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ostringstream msg;
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msg << "invalid flags: " << hex << sb.flags;
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visitor.visit(superblock_invalid(msg.str()));
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}
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void
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caching::write_superblock(block_manager<>::ptr bm,
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superblock_detail::superblock const &sb)
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{
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write_superblock(bm, SUPERBLOCK_LOCATION, sb);
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if (sb.blocknr >= nr_metadata_blocks) {
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ostringstream msg;
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msg << "blocknr out of bounds: " << sb.blocknr << " >= " << nr_metadata_blocks;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.magic != SUPERBLOCK_MAGIC) {
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ostringstream msg;
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msg << "magic in incorrect: " << sb.magic;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.version >= VERSION_END) {
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ostringstream msg;
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msg << "version incorrect: " << sb.version;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.version < VERSION_BEGIN) {
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ostringstream msg;
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msg << "version incorrect: " << sb.version;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (::strnlen((char const *) sb.policy_name, CACHE_POLICY_NAME_SIZE) == CACHE_POLICY_NAME_SIZE) {
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visitor.visit(superblock_invalid("policy name is not null terminated"));
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}
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if (sb.policy_hint_size % 4 || sb.policy_hint_size > 128) {
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ostringstream msg;
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msg << "policy hint size invalid: " << sb.policy_hint_size;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.metadata_block_size != 8) {
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ostringstream msg;
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msg << "metadata block size incorrect: " << sb.metadata_block_size;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.compat_flags != 0) {
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ostringstream msg;
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msg << "compat_flags invalid (can only be 0): " << sb.compat_flags;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.compat_ro_flags != 0) {
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ostringstream msg;
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msg << "compat_ro_flags invalid (can only be 0): " << sb.compat_ro_flags;
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visitor.visit(superblock_invalid(msg.str()));
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}
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if (sb.incompat_flags != 0) {
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ostringstream msg;
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msg << "incompat_flags invalid (can only be 0): " << sb.incompat_flags;
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visitor.visit(superblock_invalid(msg.str()));
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}
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}
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void
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caching::check_superblock(persistent_data::block_manager<>::ptr bm,
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superblock_detail::damage_visitor &visitor)
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block_address nr_metadata_blocks,
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damage_visitor &visitor)
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{
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using namespace superblock_detail;
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superblock sb;
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try {
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bm->read_lock(SUPERBLOCK_LOCATION, superblock_validator());
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sb = read_superblock(bm, SUPERBLOCK_LOCATION);
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} catch (std::exception const &e) {
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visitor.visit(superblock_corruption(e.what()));
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// FIXME: what if it fails due to a zero length file? Not
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// really a corruption, so much as an io error. Should we
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// separate these?
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visitor.visit(superblock_corrupt(e.what()));
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}
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check_superblock(sb, nr_metadata_blocks, visitor);
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}
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//----------------------------------------------------------------
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@ -7,52 +7,16 @@
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//----------------------------------------------------------------
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namespace caching {
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namespace superblock_detail {
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using namespace base;
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typedef unsigned char __u8;
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unsigned const SPACE_MAP_ROOT_SIZE = 128;
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unsigned const CACHE_POLICY_NAME_SIZE = 16;
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unsigned const CACHE_POLICY_VERSION_SIZE = 3;
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typedef unsigned char __u8;
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struct superblock_disk {
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le32 csum;
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le32 flags;
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le64 blocknr;
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__u8 uuid[16];
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le64 magic;
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le32 version;
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__u8 policy_name[CACHE_POLICY_NAME_SIZE];
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le32 policy_version[CACHE_POLICY_VERSION_SIZE];
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le32 policy_hint_size;
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__u8 metadata_space_map_root[SPACE_MAP_ROOT_SIZE];
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le64 mapping_root;
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le64 hint_root;
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le64 discard_root;
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le64 discard_block_size;
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le64 discard_nr_blocks;
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le32 data_block_size; /* in 512-byte sectors */
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le32 metadata_block_size; /* in 512-byte sectors */
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le32 cache_blocks;
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le32 compat_flags;
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le32 compat_ro_flags;
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le32 incompat_flags;
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le32 read_hits;
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le32 read_misses;
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le32 write_hits;
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le32 write_misses;
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} __attribute__ ((packed));
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block_address const SUPERBLOCK_LOCATION = 0;
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struct superblock {
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superblock();
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uint32_t csum;
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uint32_t flags;
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uint64_t blocknr;
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@ -88,31 +52,37 @@ namespace caching {
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uint32_t write_misses;
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};
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struct superblock_traits {
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typedef superblock_disk disk_type;
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typedef superblock value_type;
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static void unpack(superblock_disk const &disk, superblock &value);
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static void pack(superblock const &value, superblock_disk &disk);
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};
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block_address const SUPERBLOCK_LOCATION = 0;
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uint32_t const SUPERBLOCK_MAGIC = 06142003;
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//--------------------------------
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namespace superblock_damage {
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class damage_visitor;
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struct damage {
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class damage {
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public:
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damage(std::string const &desc)
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: desc_(desc) {
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}
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virtual ~damage() {}
|
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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);
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
@ -53,6 +53,7 @@ TEST_SOURCE=\
|
||||
unit-tests/btree_damage_visitor_t.cc \
|
||||
unit-tests/buffer_t.cc \
|
||||
unit-tests/cache_t.cc \
|
||||
unit-tests/cache_superblock_t.cc \
|
||||
unit-tests/damage_tracker_t.cc \
|
||||
unit-tests/endian_t.cc \
|
||||
unit-tests/rmap_visitor_t.cc \
|
||||
|
||||
140
unit-tests/cache_superblock_t.cc
Normal file
140
unit-tests/cache_superblock_t.cc
Normal file
@ -0,0 +1,140 @@
|
||||
#include "gmock/gmock.h"
|
||||
#include "caching/superblock.h"
|
||||
|
||||
using namespace caching;
|
||||
using namespace superblock_damage;
|
||||
using namespace testing;
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
namespace {
|
||||
class damage_visitor_mock : public damage_visitor {
|
||||
public:
|
||||
MOCK_METHOD1(visit, void(superblock_corrupt const &));
|
||||
MOCK_METHOD1(visit, void(superblock_invalid const &));
|
||||
};
|
||||
|
||||
class CacheSuperblockTests : public Test {
|
||||
public:
|
||||
CacheSuperblockTests() {
|
||||
}
|
||||
|
||||
void check() {
|
||||
check_superblock(sb_, 100, visitor_);
|
||||
}
|
||||
|
||||
void expect_invalid() {
|
||||
EXPECT_CALL(visitor_, visit(Matcher<superblock_invalid const &>(_))).Times(1);
|
||||
}
|
||||
|
||||
void check_invalid() {
|
||||
expect_invalid();
|
||||
check();
|
||||
}
|
||||
|
||||
damage_visitor_mock visitor_;
|
||||
superblock sb_;
|
||||
};
|
||||
|
||||
bool operator ==(superblock_corrupt const &lhs, superblock_corrupt const &rhs) {
|
||||
return lhs.get_desc() == rhs.get_desc();
|
||||
}
|
||||
|
||||
bool operator ==(superblock_invalid const &lhs, superblock_invalid const &rhs) {
|
||||
return lhs.get_desc() == rhs.get_desc();
|
||||
}
|
||||
|
||||
ostream &operator <<(ostream &out, damage const &d) {
|
||||
out << d.get_desc();
|
||||
return out;
|
||||
}
|
||||
|
||||
ostream &operator <<(ostream &out, superblock_invalid const &d) {
|
||||
out << "superblock_invalid: " << d.get_desc();
|
||||
return out;
|
||||
}
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
TEST_F(CacheSuperblockTests, default_constructed_superblock_is_valid)
|
||||
{
|
||||
sb_.flags = 0;
|
||||
check();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, non_zero_flags_are_invalid)
|
||||
{
|
||||
sb_.flags = 1;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, blocknr_is_in_range)
|
||||
{
|
||||
sb_.blocknr = 101;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, magic_is_checked)
|
||||
{
|
||||
sb_.magic = 12345;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, version_gt_1_is_checked)
|
||||
{
|
||||
sb_.version = 2;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, version_lt_1_is_checked)
|
||||
{
|
||||
sb_.version = 0;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, policy_name_must_be_null_terminated)
|
||||
{
|
||||
for (unsigned i = 0; i < CACHE_POLICY_NAME_SIZE; i++)
|
||||
sb_.policy_name[i] = 'a';
|
||||
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, policy_hint_size_checked)
|
||||
{
|
||||
sb_.policy_hint_size = 3;
|
||||
check_invalid();
|
||||
|
||||
sb_.policy_hint_size = 129;
|
||||
check_invalid();
|
||||
|
||||
sb_.policy_hint_size = 132;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, metadata_block_size_checked)
|
||||
{
|
||||
sb_.metadata_block_size = 16;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, compat_flags_checked)
|
||||
{
|
||||
sb_.compat_flags = 1;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, compat_ro_flags_checked)
|
||||
{
|
||||
sb_.compat_ro_flags = 1;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
TEST_F(CacheSuperblockTests, incompat_flags_checked)
|
||||
{
|
||||
sb_.incompat_flags = 1;
|
||||
check_invalid();
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
Loading…
Reference in New Issue
Block a user