[thin] Introduce thin_patch_superblock to override superblock fields
This commit is contained in:
Ming-Hung Tsai
parent
c42b623e39
commit
b42408ef41
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@ -134,6 +134,7 @@ DEVTOOLS_SOURCE=\
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thin-provisioning/thin_generate_metadata.cc \
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thin-provisioning/thin_generate_mappings.cc \
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thin-provisioning/variable_chunk_stream.cc \
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thin-provisioning/thin_patch_superblock.cc \
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thin-provisioning/thin_show_metadata.cc \
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thin-provisioning/thin_scan.cc \
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ui/ui.cc
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@ -25,6 +25,7 @@ thin_provisioning::register_thin_commands(base::application &app)
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app.add_cmd(command::ptr(new thin_generate_damage_cmd()));
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app.add_cmd(command::ptr(new thin_generate_metadata_cmd()));
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app.add_cmd(command::ptr(new thin_generate_mappings_cmd()));
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app.add_cmd(command::ptr(new thin_patch_superblock_cmd()));
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app.add_cmd(command::ptr(new thin_show_duplicates_cmd()));
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app.add_cmd(command::ptr(new thin_show_metadata_cmd()));
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app.add_cmd(command::ptr(new thin_journal_cmd()));
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@ -124,6 +124,13 @@ namespace thin_provisioning {
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virtual int run(int argc, char **argv);
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};
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class thin_patch_superblock_cmd : public base::command {
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public:
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thin_patch_superblock_cmd();
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virtual void usage(std::ostream &out) const;
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virtual int run(int argc, char **argv);
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};
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class thin_show_metadata_cmd : public base::command {
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public:
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thin_show_metadata_cmd();
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@ -0,0 +1,193 @@
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#include <getopt.h>
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#include "persistent-data/file_utils.h"
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#include "persistent-data/space-maps/disk_structures.h"
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#include "thin-provisioning/commands.h"
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#include "thin-provisioning/metadata.h"
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#include "thin-provisioning/superblock.h"
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#include "version.h"
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using namespace persistent_data;
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using namespace sm_disk_detail;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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struct flags {
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flags();
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bool check_conformance();
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string output;
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boost::optional<uint64_t> transaction_id;
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block_address data_mapping_root;
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block_address device_details_root;
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block_address metadata_bitmap_root;
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block_address metadata_ref_count_root;
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block_address data_bitmap_root;
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block_address data_ref_count_root;
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};
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flags::flags()
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: data_mapping_root(0), device_details_root(0),
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metadata_bitmap_root(0), metadata_ref_count_root(0),
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data_bitmap_root(0), data_ref_count_root(0) {
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}
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bool flags::check_conformance() {
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if (!output.size())
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return false;
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return true;
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}
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void patch_space_map_root(void *root,
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block_address bitmap_root,
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block_address ref_count_root) {
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sm_disk_detail::sm_root v;
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sm_disk_detail::sm_root_disk d;
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memcpy(&d, root, sizeof(d));
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sm_root_traits::unpack(d, v);
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if (bitmap_root)
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v.bitmap_root_ = bitmap_root;
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if (ref_count_root)
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v.ref_count_root_ = ref_count_root;
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sm_root_traits::pack(v, d);
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memcpy(root, &d, sizeof(d));
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}
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int patch_superblock(flags const &fs) {
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block_manager::ptr bm = open_bm(fs.output, block_manager::READ_WRITE);
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superblock_detail::superblock sb = read_superblock(bm, superblock_detail::SUPERBLOCK_LOCATION);
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if (fs.transaction_id)
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sb.trans_id_ = *fs.transaction_id;
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if (fs.data_mapping_root)
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sb.data_mapping_root_ = fs.data_mapping_root;
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if (fs.device_details_root)
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sb.device_details_root_ = fs.device_details_root;
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patch_space_map_root(sb.metadata_space_map_root_,
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fs.metadata_bitmap_root,
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fs.metadata_ref_count_root);
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patch_space_map_root(sb.data_space_map_root_,
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fs.data_bitmap_root,
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fs.data_ref_count_root);
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write_superblock(bm, sb);
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return 0;
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}
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}
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//----------------------------------------------------------------
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thin_patch_superblock_cmd::thin_patch_superblock_cmd()
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: command("thin_patch_superblock")
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{
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}
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void
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thin_patch_superblock_cmd::usage(std::ostream &out) const
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{
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out << "Usage: " << get_name() << " [options]\n"
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<< "Options:\n"
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<< " {-h|--help}\n"
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<< " {-o|--output} <output device or file>\n"
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<< " {--transaction-id} <tid>\n"
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<< " {--data-mapping-root} <blocknr>\n"
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<< " {--device-details-root} <blocknr>\n"
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<< " {--metadata-bitmap-root} <blocknr>\n"
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<< " {--metadata-ref-count-root} <blocknr>\n"
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<< " {--data-bitmap-root} <blocknr>\n"
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<< " {--data-ref-count-root} <blocknr>\n"
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<< " {-V|--version}" << endl;
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}
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int
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thin_patch_superblock_cmd::run(int argc, char **argv)
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{
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int c;
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flags fs;
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const char shortopts[] = "ho:V";
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const struct option longopts[] = {
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{ "help", no_argument, NULL, 'h'},
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{ "output", required_argument, NULL, 'o'},
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{ "transaction-id", required_argument, NULL, 1 },
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{ "data-mapping-root", required_argument, NULL, 2 },
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{ "device-details-root", required_argument, NULL, 3 },
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{ "metadata-bitmap-root", required_argument, NULL, 4 },
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{ "metadata-ref-count-root", required_argument, NULL, 5 },
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{ "data-bitmap-root", required_argument, NULL, 6 },
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{ "data-ref-count-root", required_argument, NULL, 7 },
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{ "version", no_argument, NULL, 'V'},
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{ NULL, no_argument, NULL, 0 }
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};
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while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
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switch(c) {
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case 'h':
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usage(cout);
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return 0;
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case 'o':
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fs.output = optarg;
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break;
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case 1:
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fs.transaction_id = parse_uint64(optarg, "transaction_id");
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break;
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case 2:
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fs.data_mapping_root = parse_uint64(optarg, "data_mapping_root");
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break;
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case 3:
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fs.device_details_root = parse_uint64(optarg, "device_details_root");
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break;
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case 4:
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fs.metadata_bitmap_root = parse_uint64(optarg, "metadata_bitmap_root");
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break;
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case 5:
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fs.metadata_ref_count_root = parse_uint64(optarg, "metadata_ref_count_root");
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break;
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case 6:
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fs.data_bitmap_root = parse_uint64(optarg, "data_bitmap_root");
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break;
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case 7:
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fs.data_ref_count_root = parse_uint64(optarg, "data_ref_count_root");
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break;
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case 'V':
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cout << THIN_PROVISIONING_TOOLS_VERSION << endl;
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return 0;
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default:
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usage(cerr);
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return 1;
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}
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}
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if (!fs.check_conformance()) {
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usage(cerr);
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return 1;
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}
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return patch_superblock(fs);
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}
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//----------------------------------------------------------------
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