Merge branch 'low_level_examine_metadata' into merge-show-blocks

Conflicts:
	.gitignore
	Makefile.in
	persistent-data/space-maps/disk.cc
This commit is contained in:
Joe Thornber 2016-02-24 15:24:43 +00:00
commit 0349956015
8 changed files with 185 additions and 5 deletions

19
.gitignore vendored
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@ -11,6 +11,23 @@ cachegrind.*
core
bin/pdata_tools
thin_check
thin_dump
thin_restore
thin_repair
thin_rmap
thin_metadata_size
thin_show_blocks
cache_check
cache_dump
cache_restore
cache_repair
cache_metadata_size
era_check
era_dump
era_invalidate
*.metadata
bad-metadata
@ -27,6 +44,8 @@ autom4te.cache/
*.xml
*.bin
*.patch
*.orig
*.rej
version.h
config.cache

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@ -105,7 +105,8 @@ SOURCE=\
DEVTOOLS_SOURCE=\
thin-provisioning/thin_generate_metadata.cc \
thin-provisioning/variable_chunk_stream.cc
thin-provisioning/variable_chunk_stream.cc \
thin-provisioning/thin_show_blocks.cc
ifeq ("@DEVTOOLS@", "yes")
SOURCE+=$(DEVTOOLS_SOURCE)

1
bin/thin_show_metadata Symbolic link
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@ -0,0 +1 @@
pdata_tools

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@ -62,8 +62,6 @@ namespace {
//--------------------------------
uint64_t const INDEX_CSUM_XOR = 160478;
// FIXME: factor out the common code in these validators
struct index_block_validator : public bcache::validator {
virtual void check(void const *raw, block_address location) const {

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@ -111,6 +111,9 @@ namespace persistent_data {
le32 not_used;
le64 blocknr;
} __attribute__ ((packed));
uint64_t const BITMAP_CSUM_XOR = 240779;
uint64_t const INDEX_CSUM_XOR = 160478;
}
}

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@ -16,11 +16,12 @@ thin_provisioning::register_thin_commands(base::application &app)
app.add_cmd(command::ptr(new thin_restore_cmd()));
app.add_cmd(command::ptr(new thin_repair_cmd()));
app.add_cmd(command::ptr(new thin_rmap_cmd()));
app.add_cmd(command::ptr(new thin_trim_cmd()));
#ifdef DEV_TOOLS
app.add_cmd(command::ptr(new thin_trim_cmd()));
app.add_cmd(command::ptr(new thin_generate_metadata_cmd()));
app.add_cmd(command::ptr(new thin_show_duplicates_cmd()));
app.add_cmd(command::ptr(new thin_show_metadata_cmd()));
#endif
}

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@ -63,6 +63,7 @@ namespace thin_provisioning {
virtual int run(int argc, char **argv);
};
#ifdef DEV_TOOLS
class thin_trim_cmd : public base::command {
public:
thin_trim_cmd();
@ -84,6 +85,14 @@ namespace thin_provisioning {
virtual int run(int argc, char **argv);
};
class thin_show_metadata_cmd : public base::command {
public:
thin_show_metadata_cmd();
virtual void usage(std::ostream &out) const;
virtual int run(int argc, char **argv);
};
#endif
void register_thin_commands(base::application &app);
}

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@ -0,0 +1,148 @@
#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"
#include "thin-provisioning/metadata.h"
#include "thin-provisioning/superblock.h"
#include "version.h"
#include <iostream>
#include <getopt.h>
#include <libgen.h>
#include <stdlib.h>
#include <stdexcept>
using namespace persistent_data;
using namespace sm_disk_detail;
using namespace std;
using namespace thin_provisioning;
//----------------------------------------------------------------
namespace {
bool is_superblock(block_manager<>::read_ref &rr) {
using namespace superblock_detail;
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;
return true;
}
return false;
}
bool is_bitmap_block(block_manager<>::read_ref &rr) {
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);
}
bool is_index_block(block_manager<>::read_ref &rr) {
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_);
}
bool is_btree_node(block_manager<>::read_ref &rr) {
using namespace btree_detail;
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);
}
void show_blocks(string const &dev) {
block_manager<>::ptr bm = open_bm(dev, block_manager<>::READ_ONLY);
metadata md(bm, metadata::OPEN);
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);
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;
}
}
}
//----------------------------------------------------------------
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)
{
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);
return 0;
case 'V':
cerr << THIN_PROVISIONING_TOOLS_VERSION << endl;
return 0;
}
}
if (argc == optind) {
usage(cerr);
exit(1);
}
try {
show_blocks(argv[optind]);
} catch (std::exception const &e) {
cerr << e.what() << endl;
return 1;
}
return 0;
}
//----------------------------------------------------------------