thin-provisioning-tools/thin-provisioning/thin_show_metadata.cc

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#include "persistent-data/checksum.h"
#include "persistent-data/data-structures/btree.h"
#include "persistent-data/file_utils.h"
#include "persistent-data/space-maps/disk_structures.h"
#include "thin-provisioning/commands.h"
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#include "thin-provisioning/metadata.h"
#include "thin-provisioning/superblock.h"
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#include "ui/ui.h"
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#include "version.h"
#include <iostream>
#include <getopt.h>
#include <libgen.h>
#include <stdlib.h>
#include <stdexcept>
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#include <memory>
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using namespace persistent_data;
using namespace sm_disk_detail;
using namespace std;
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using namespace thin_provisioning;
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using namespace ui;
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//----------------------------------------------------------------
namespace {
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class examiner {
public:
examiner(string const &name, int colour_pair, char rep)
: name_(name),
colour_pair_(colour_pair),
rep_(rep) {
}
virtual ~examiner() {}
virtual bool recognise(block_manager::read_ref rr) const = 0;
// virtual void render_block(text_ui &ui, block_manager::read_ref rr) = 0;
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string const &get_name() const {
return name_;
}
int get_color_pair() const {
return colour_pair_;
}
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char get_rep() const {
return rep_;
}
private:
string name_;
int colour_pair_;
char rep_;
};
class raw_examiner : public examiner {
public:
raw_examiner()
: examiner("raw", 5, '?') {
}
virtual bool recognise(block_manager::read_ref rr) const {
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return true;
}
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};
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class superblock_examiner : public examiner {
public:
superblock_examiner()
: examiner("superblock", 1, 'S') {
}
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virtual bool recognise(block_manager::read_ref rr) const {
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using namespace superblock_detail;
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superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(rr.data());
if (to_cpu<uint64_t>(sbd->magic_) == SUPERBLOCK_MAGIC) {
superblock sb;
superblock_traits::unpack(*sbd, sb);
cout << "metadata nr blocks: " << sb.metadata_nr_blocks_ << endl;
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return true;
}
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return false;
}
};
class bitmap_examiner : public examiner {
public:
bitmap_examiner()
: examiner("bitmap", 2, ':') {
}
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virtual bool recognise(block_manager::read_ref rr) const {
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bitmap_header const *data = reinterpret_cast<bitmap_header const *>(rr.data());
crc32c sum(BITMAP_CSUM_XOR);
sum.append(&data->not_used, MD_BLOCK_SIZE - sizeof(uint32_t));
return sum.get_sum() == to_cpu<uint32_t>(data->csum);
}
};
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class index_examiner : public examiner {
public:
index_examiner()
: examiner("index", 3, 'i') {
}
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virtual bool recognise(block_manager::read_ref rr) const {
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metadata_index const *mi = reinterpret_cast<metadata_index const *>(rr.data());
crc32c sum(INDEX_CSUM_XOR);
sum.append(&mi->padding_, MD_BLOCK_SIZE - sizeof(uint32_t));
return sum.get_sum() == to_cpu<uint32_t>(mi->csum_);
}
};
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class btree_examiner : public examiner {
public:
btree_examiner(string const &name, int colour_pair, char c)
: examiner(name, colour_pair, c) {
}
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bool is_btree_node(block_manager::read_ref rr) const {
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using namespace btree_detail;
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disk_node const *data = reinterpret_cast<disk_node const *>(rr.data());
node_header const *n = &data->header;
crc32c sum(BTREE_CSUM_XOR);
sum.append(&n->flags, MD_BLOCK_SIZE - sizeof(uint32_t));
return sum.get_sum() == to_cpu<uint32_t>(n->csum);
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}
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};
class dev_detail_examiner : public btree_examiner {
public:
dev_detail_examiner()
: btree_examiner("dev_details", 4, 'd') {
}
virtual bool recognise(block_manager::read_ref rr) const {
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if (!btree_examiner::is_btree_node(rr))
return false;
using namespace btree_detail;
disk_node const *data = reinterpret_cast<disk_node const *>(rr.data());
node_header const *n = &data->header;
return to_cpu<uint32_t>(n->value_size) == sizeof(device_tree_detail::device_details_disk);
}
};
class ref_count_examiner : public btree_examiner {
public:
ref_count_examiner()
: btree_examiner("ref_count node", 6, 'r') {
}
virtual bool recognise(block_manager::read_ref rr) const {
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if (!btree_examiner::is_btree_node(rr))
return false;
using namespace btree_detail;
disk_node const *data = reinterpret_cast<disk_node const *>(rr.data());
node_header const *n = &data->header;
return to_cpu<uint32_t>(n->value_size) == sizeof(uint32_t);
}
};
class mapping_examiner : public btree_examiner {
public:
mapping_examiner()
: btree_examiner("mapping node", 7, 'm') {
}
virtual bool recognise(block_manager::read_ref rr) const {
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if (!btree_examiner::is_btree_node(rr))
return false;
using namespace btree_detail;
disk_node const *data = reinterpret_cast<disk_node const *>(rr.data());
node_header const *n = &data->header;
return to_cpu<uint32_t>(n->value_size) == sizeof(uint64_t);
}
};
class main_dialog {
public:
main_dialog(text_ui &ui,
block_manager const &bm)
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: ui_(ui),
bm_(bm),
raw_examiner_(new raw_examiner()) {
examiners_.push_back(shared_ptr<examiner>(new superblock_examiner()));
examiners_.push_back(shared_ptr<examiner>(new bitmap_examiner()));
examiners_.push_back(shared_ptr<examiner>(new index_examiner()));
examiners_.push_back(shared_ptr<examiner>(new dev_detail_examiner()));
examiners_.push_back(shared_ptr<examiner>(new ref_count_examiner()));
examiners_.push_back(shared_ptr<examiner>(new mapping_examiner()));
}
void run() {
auto line_length = 80;
block_address nr_blocks = std::min<block_address>(2000, bm_.get_nr_blocks());
for (block_address b = 0; b < nr_blocks; b++) {
block_manager::read_ref rr = bm_.read_lock(b);
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if (!(b % line_length)) {
if (b > 0)
printw("\n");
printw("%8llu: ", b);
}
auto e = find_examiner(rr);
attron(COLOR_PAIR(e->get_color_pair()));
printw("%c", e->get_rep());
attroff(COLOR_PAIR(e->get_color_pair()));
}
printw("\n");
show_superblock();
}
private:
void show_superblock() {
auto sb = read_superblock(bm_);
printw("\n\nSuperblock at 0\n");
printw("data mapping root: %llu\n", sb.data_mapping_root_);
printw("device details root: %llu\n", sb.device_details_root_);
printw("data block size: %u\n", sb.data_block_size_);
printw("metadata nr blocks: %llu\n", sb.metadata_nr_blocks_);
}
shared_ptr<examiner> &find_examiner(block_manager::read_ref const &rr) {
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for (shared_ptr<examiner> &e : examiners_) {
if (e->recognise(rr))
return e;
}
return raw_examiner_;
}
text_ui &ui_;
block_manager const &bm_;
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list<shared_ptr<examiner>> examiners_;
shared_ptr<examiner> raw_examiner_;
#if 0
void show_superblock(text_ui &ui, superblock_detail::superblock const &sb) {
}
void show_blocks(text_ui &ui, string const &dev) {
metadata md(bm);
show_superblock(ui, md.sb_);
#if 0
cout << "Metadata space map: nr_blocks = " << md.metadata_sm_->get_nr_blocks()
<< ", nr_free_blocks = " << md.metadata_sm_->get_nr_free()
<< endl;
cout << "Data space map: nr_blocks = " << md.data_sm_->get_nr_blocks()
<< ", nr_free_blocks = " << md.data_sm_->get_nr_free()
<< endl;
block_address nr_blocks = bm->get_nr_blocks();
for (block_address b = 0; b < nr_blocks; b++) {
block_manager::read_ref rr = bm->read_lock(b);
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if (is_superblock(rr))
cout << b << ": superblock" << endl;
else if (is_bitmap_block(rr))
cout << b << ": bitmap block" << endl;
else if (is_btree_node(rr))
cout << b << ": btree_node" << endl;
else
cout << b << ": unknown" << endl;
}
#endif
}
#endif
};
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}
//----------------------------------------------------------------
thin_show_metadata_cmd::thin_show_metadata_cmd()
: command("thin_show_metadata")
{
}
void
thin_show_metadata_cmd::usage(ostream &out) const
{
out << "Usage: " << get_name() << " {device|file}" << endl
<< "Options:" << endl
<< " {-h|--help}" << endl
<< " {-V|--version}" << endl;
}
int
thin_show_metadata_cmd::run(int argc, char **argv)
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{
int c;
const char shortopts[] = "hV";
const struct option longopts[] = {
{ "help", no_argument, NULL, 'h'},
{ "version", no_argument, NULL, 'V'},
{ NULL, no_argument, NULL, 0 }
};
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch(c) {
case 'h':
usage(cout);
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return 0;
case 'V':
cerr << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
}
}
if (argc == optind) {
usage(cerr);
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exit(1);
}
try {
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ui::text_ui ui;
block_manager::ptr bm = open_bm(argv[optind], block_manager::READ_ONLY, true);
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main_dialog dialog(ui, *bm);
dialog.run();
#if 0
// show_blocks(ui, argv[optind]);
#endif
#if 0
attron(COLOR_PAIR(1));
printw("Hello, ");
attron(A_BOLD);
printw("world!\n");
attroff(A_BOLD);
attroff(COLOR_PAIR(1));
#endif
getch();
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} catch (std::exception const &e) {
cerr << e.what() << endl;
return 1;
}
return 0;
}
//----------------------------------------------------------------