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[thin_debug] Add commands to show space maps

This commit is contained in:
Ming-Hung Tsai 2021-01-13 11:56:18 +08:00
parent 3bfa775887
commit 6dc5086643
1 changed files with 63 additions and 0 deletions
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63
thin-provisioning/thin_debug.cc
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@ -28,6 +28,7 @@
#include <string>
#include <vector>
#include "base/math_utils.h"
#include "persistent-data/data-structures/btree.h"
#include "persistent-data/data-structures/simple_traits.h"
#include "persistent-data/file_utils.h"
@ -202,6 +203,8 @@ namespace {
<< " m1_node <block# of top-level mapping tree node>" << endl
<< " m2_node <block# of bottom-level mapping tree node>" << endl
<< " detail_node <block# of device details tree node>" << endl
<< " index_block <block# of metadata space map root>" << endl
<< " index_node <block# of data space map node>" << endl
<< " exit" << endl;
}
};
@ -318,6 +321,18 @@ namespace {
}
};
class index_entry_show_traits : public persistent_data::sm_disk_detail::index_entry_traits {
public:
typedef persistent_data::sm_disk_detail::index_entry_traits value_trait;
static void show(formatter &f, string const &key,
persistent_data::sm_disk_detail::index_entry const &value) {
field(f, "blocknr", value.blocknr_);
field(f, "nr free", value.nr_free_);
field(f, "none free before", value.none_free_before_);
}
};
template <typename ShowTraits>
class show_btree_node : public command {
public:
@ -368,6 +383,52 @@ namespace {
metadata::ptr md_;
};
class show_index_block : public command {
public:
explicit show_index_block(metadata::ptr md)
: md_(md) {
}
virtual void exec(strings const &args, ostream &out) {
if (args.size() != 2)
throw runtime_error("incorrect number of arguments");
// manually load metadata_index, without using index_validator()
block_address block = lexical_cast<block_address>(args[1]);
block_manager::read_ref rr = md_->tm_->read_lock(block);
sm_disk_detail::sm_root_disk const *d =
reinterpret_cast<sm_disk_detail::sm_root_disk const *>(md_->sb_.metadata_space_map_root_);
sm_disk_detail::sm_root v;
sm_disk_detail::sm_root_traits::unpack(*d, v);
block_address nr_indexes = base::div_up<block_address>(v.nr_blocks_, ENTRIES_PER_BLOCK);
sm_disk_detail::metadata_index const *mdi =
reinterpret_cast<sm_disk_detail::metadata_index const *>(rr.data());
show_metadata_index(mdi, nr_indexes, out);
}
private:
void show_metadata_index(sm_disk_detail::metadata_index const *mdi, block_address nr_indexes, ostream &out) {
xml_formatter f;
field(f, "csum", to_cpu<uint32_t>(mdi->csum_));
field(f, "padding", to_cpu<uint32_t>(mdi->padding_));
field(f, "blocknr", to_cpu<uint64_t>(mdi->blocknr_));
sm_disk_detail::index_entry ie;
for (block_address i = 0; i < nr_indexes; i++) {
sm_disk_detail::index_entry_traits::unpack(*(mdi->index + i), ie);
formatter::ptr f2(new xml_formatter);
index_entry_show_traits::show(*f2, "value", ie);
f.child(lexical_cast<string>(i), f2);
}
f.output(out, 0);
}
unsigned const ENTRIES_PER_BLOCK = (MD_BLOCK_SIZE - sizeof(persistent_data::sm_disk_detail::bitmap_header)) * 4;
metadata::ptr md_;
};
//--------------------------------
int debug(string const &path, bool ignore_metadata_sm) {
@ -380,6 +441,8 @@ namespace {
interp.register_command("m1_node", command::ptr(new show_btree_node<uint64_show_traits>(md)));
interp.register_command("m2_node", command::ptr(new show_btree_node<block_show_traits>(md)));
interp.register_command("detail_node", command::ptr(new show_btree_node<device_details_show_traits>(md)));
interp.register_command("index_block", command::ptr(new show_index_block(md)));
interp.register_command("index_node", command::ptr(new show_btree_node<index_entry_show_traits>(md)));
interp.register_command("help", command::ptr(new help));
interp.register_command("exit", command::ptr(new exit_handler(interp)));
interp.enter_main_loop();