298 lines
12 KiB
C++
298 lines
12 KiB
C++
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 (see README.md for details)
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#include "disk_tool.h"
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#include "rw_blocking.h"
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#include "osd_id.h"
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int disk_tool_t::process_meta(std::function<void(blockstore_meta_header_v2_t *)> hdr_fn,
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std::function<void(uint64_t, clean_disk_entry*, uint8_t*)> record_fn)
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{
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if (dsk.meta_block_size % DIRECT_IO_ALIGNMENT)
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{
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fprintf(stderr, "Invalid metadata block size: is not a multiple of %d\n", DIRECT_IO_ALIGNMENT);
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return 1;
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}
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dsk.meta_fd = open(dsk.meta_device.c_str(), O_DIRECT|O_RDONLY);
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if (dsk.meta_fd < 0)
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{
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fprintf(stderr, "Failed to open metadata device %s: %s\n", dsk.meta_device.c_str(), strerror(errno));
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return 1;
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}
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int buf_size = 1024*1024;
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if (buf_size % dsk.meta_block_size)
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buf_size = 8*dsk.meta_block_size;
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if (buf_size > dsk.meta_len)
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buf_size = dsk.meta_len;
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void *data = memalign_or_die(MEM_ALIGNMENT, buf_size);
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lseek64(dsk.meta_fd, dsk.meta_offset, 0);
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read_blocking(dsk.meta_fd, data, dsk.meta_block_size);
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// Check superblock
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blockstore_meta_header_v2_t *hdr = (blockstore_meta_header_v2_t *)data;
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if (hdr->zero == 0 && hdr->magic == BLOCKSTORE_META_MAGIC_V1)
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{
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if (hdr->version == BLOCKSTORE_META_FORMAT_V1)
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{
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// Vitastor 0.6-0.8 - static array of clean_disk_entry with bitmaps
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hdr->data_csum_type = 0;
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hdr->csum_block_size = 0;
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hdr->header_csum = 0;
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}
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else if (hdr->version == BLOCKSTORE_META_FORMAT_V2)
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{
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// Vitastor 0.9 - static array of clean_disk_entry with bitmaps and checksums
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if (hdr->data_csum_type != 0 &&
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hdr->data_csum_type != BLOCKSTORE_CSUM_CRC32C)
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{
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fprintf(stderr, "I don't know checksum format %u, the only supported format is crc32c = %u.\n", hdr->data_csum_type, BLOCKSTORE_CSUM_CRC32C);
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free(data);
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close(dsk.meta_fd);
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dsk.meta_fd = -1;
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return 1;
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}
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}
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else
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{
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// Unsupported version
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fprintf(stderr, "Metadata format is too new for me (stored version is %ju, max supported %u).\n", hdr->version, BLOCKSTORE_META_FORMAT_V2);
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free(data);
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close(dsk.meta_fd);
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dsk.meta_fd = -1;
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return 1;
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}
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if (hdr->meta_block_size != dsk.meta_block_size)
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{
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fprintf(stderr, "Using block size of %u bytes based on information from the superblock\n", hdr->meta_block_size);
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dsk.meta_block_size = hdr->meta_block_size;
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if (buf_size % dsk.meta_block_size)
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{
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buf_size = 8*dsk.meta_block_size;
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void *new_data = memalign_or_die(MEM_ALIGNMENT, buf_size);
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memcpy(new_data, data, dsk.meta_block_size);
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free(data);
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data = new_data;
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hdr = (blockstore_meta_header_v2_t *)data;
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}
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}
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dsk.meta_format = hdr->version;
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dsk.data_block_size = hdr->data_block_size;
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dsk.csum_block_size = hdr->csum_block_size;
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dsk.data_csum_type = hdr->data_csum_type;
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dsk.bitmap_granularity = hdr->bitmap_granularity;
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dsk.clean_entry_bitmap_size = (hdr->data_block_size / hdr->bitmap_granularity + 7) / 8;
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dsk.clean_entry_size = sizeof(clean_disk_entry) + 2*dsk.clean_entry_bitmap_size
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+ (hdr->data_csum_type
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? ((hdr->data_block_size+hdr->csum_block_size-1)/hdr->csum_block_size
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*(hdr->data_csum_type & 0xff))
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: 0)
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+ (dsk.meta_format == BLOCKSTORE_META_FORMAT_V2 ? 4 /*entry_csum*/ : 0);
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uint64_t block_num = 0;
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hdr_fn(hdr);
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hdr = NULL;
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meta_pos = dsk.meta_block_size;
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lseek64(dsk.meta_fd, dsk.meta_offset+meta_pos, 0);
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while (meta_pos < dsk.meta_len)
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{
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uint64_t read_len = buf_size < dsk.meta_len-meta_pos ? buf_size : dsk.meta_len-meta_pos;
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read_blocking(dsk.meta_fd, data, read_len);
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meta_pos += read_len;
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for (uint64_t blk = 0; blk < read_len; blk += dsk.meta_block_size)
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{
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for (uint64_t ioff = 0; ioff <= dsk.meta_block_size-dsk.clean_entry_size; ioff += dsk.clean_entry_size, block_num++)
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{
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clean_disk_entry *entry = (clean_disk_entry*)((uint8_t*)data + blk + ioff);
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if (entry->oid.inode)
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{
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if (dsk.data_csum_type)
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{
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uint32_t *entry_csum = (uint32_t*)((uint8_t*)entry + dsk.clean_entry_size - 4);
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if (*entry_csum != crc32c(0, entry, dsk.clean_entry_size - 4))
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{
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fprintf(stderr, "Metadata entry %ju is corrupt (checksum mismatch), skipping\n", block_num);
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continue;
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}
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}
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record_fn(block_num, entry, entry->bitmap);
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}
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}
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}
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}
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}
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else
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{
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// Vitastor 0.4-0.5 - static array of clean_disk_entry
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dsk.clean_entry_bitmap_size = 0;
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dsk.clean_entry_size = sizeof(clean_disk_entry);
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uint64_t block_num = 0;
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hdr_fn(NULL);
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while (meta_pos < dsk.meta_len)
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{
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uint64_t read_len = buf_size < dsk.meta_len-meta_pos ? buf_size : dsk.meta_len-meta_pos;
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read_blocking(dsk.meta_fd, data, read_len);
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meta_pos += read_len;
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for (uint64_t blk = 0; blk < read_len; blk += dsk.meta_block_size)
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{
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for (uint64_t ioff = 0; ioff < dsk.meta_block_size-dsk.clean_entry_size; ioff += dsk.clean_entry_size, block_num++)
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{
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clean_disk_entry *entry = (clean_disk_entry*)((uint8_t*)data + blk + ioff);
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if (entry->oid.inode)
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{
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record_fn(block_num, entry, NULL);
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}
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}
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}
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}
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}
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free(data);
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close(dsk.meta_fd);
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dsk.meta_fd = -1;
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return 0;
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}
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int disk_tool_t::dump_meta()
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{
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int r = process_meta(
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[this](blockstore_meta_header_v2_t *hdr) { dump_meta_header(hdr); },
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[this](uint64_t block_num, clean_disk_entry *entry, uint8_t *bitmap) { dump_meta_entry(block_num, entry, bitmap); }
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);
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if (r == 0)
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printf("\n]}\n");
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return r;
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}
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void disk_tool_t::dump_meta_header(blockstore_meta_header_v2_t *hdr)
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{
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if (hdr)
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{
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if (hdr->version == BLOCKSTORE_META_FORMAT_V1)
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{
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printf(
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"{\"version\":\"0.6\",\"meta_block_size\":%u,\"data_block_size\":%u,\"bitmap_granularity\":%u,"
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"\"entries\":[\n",
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hdr->meta_block_size, hdr->data_block_size, hdr->bitmap_granularity
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);
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}
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else if (hdr->version == BLOCKSTORE_META_FORMAT_V2)
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{
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printf(
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"{\"version\":\"0.9\",\"meta_block_size\":%u,\"data_block_size\":%u,\"bitmap_granularity\":%u,"
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"\"data_csum_type\":%s,\"csum_block_size\":%u,\"entries\":[\n",
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hdr->meta_block_size, hdr->data_block_size, hdr->bitmap_granularity,
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csum_type_str(hdr->data_csum_type).c_str(), hdr->csum_block_size
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);
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}
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}
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else
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{
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printf("{\"version\":\"0.5\",\"meta_block_size\":%ju,\"entries\":[\n", dsk.meta_block_size);
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}
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first_entry = true;
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}
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void disk_tool_t::dump_meta_entry(uint64_t block_num, clean_disk_entry *entry, uint8_t *bitmap)
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{
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printf(
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#define ENTRY_FMT "{\"block\":%ju,\"pool\":%u,\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"version\":%ju"
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(first_entry ? ENTRY_FMT : (",\n" ENTRY_FMT)),
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#undef ENTRY_FMT
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block_num, INODE_POOL(entry->oid.inode), INODE_NO_POOL(entry->oid.inode),
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entry->oid.stripe, entry->version
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);
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if (bitmap)
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{
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printf(",\"bitmap\":\"");
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for (uint64_t i = 0; i < dsk.clean_entry_bitmap_size; i++)
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{
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printf("%02x", bitmap[i]);
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}
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printf("\",\"ext_bitmap\":\"");
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for (uint64_t i = 0; i < dsk.clean_entry_bitmap_size; i++)
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{
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printf("%02x", bitmap[dsk.clean_entry_bitmap_size + i]);
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}
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if (dsk.csum_block_size && dsk.data_csum_type)
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{
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uint8_t *csums = bitmap + dsk.clean_entry_bitmap_size*2;
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printf("\",\"block_csums\":\"");
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for (uint64_t i = 0; i < (dsk.data_block_size+dsk.csum_block_size-1)/dsk.csum_block_size*(dsk.data_csum_type & 0xFF); i++)
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{
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printf("%02x", csums[i]);
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}
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}
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printf("\"}");
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}
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else
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{
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printf("}");
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}
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first_entry = false;
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}
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int disk_tool_t::write_json_meta(json11::Json meta)
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{
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new_meta_buf = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, new_meta_len);
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memset(new_meta_buf, 0, new_meta_len);
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blockstore_meta_header_v2_t *new_hdr = (blockstore_meta_header_v2_t *)new_meta_buf;
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new_hdr->zero = 0;
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new_hdr->magic = BLOCKSTORE_META_MAGIC_V1;
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new_hdr->version = meta["version"].uint64_value() == BLOCKSTORE_META_FORMAT_V1
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? BLOCKSTORE_META_FORMAT_V1 : BLOCKSTORE_META_FORMAT_V2;
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new_hdr->meta_block_size = meta["meta_block_size"].uint64_value()
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? meta["meta_block_size"].uint64_value() : 4096;
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new_hdr->data_block_size = meta["data_block_size"].uint64_value()
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? meta["data_block_size"].uint64_value() : 131072;
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new_hdr->bitmap_granularity = meta["bitmap_granularity"].uint64_value()
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? meta["bitmap_granularity"].uint64_value() : 4096;
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new_hdr->data_csum_type = meta["data_csum_type"].is_number()
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? meta["data_csum_type"].uint64_value()
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: (meta["data_csum_type"].string_value() == "crc32c"
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? BLOCKSTORE_CSUM_CRC32C
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: BLOCKSTORE_CSUM_NONE);
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new_hdr->csum_block_size = meta["csum_block_size"].uint64_value();
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uint32_t new_clean_entry_header_size = (new_hdr->version == BLOCKSTORE_META_FORMAT_V1
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? sizeof(clean_disk_entry) : sizeof(clean_disk_entry) + 4 /*entry_csum*/);
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new_clean_entry_bitmap_size = (new_hdr->data_block_size / new_hdr->bitmap_granularity + 7) / 8;
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new_data_csum_size = (new_hdr->data_csum_type
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? ((new_hdr->data_block_size+new_hdr->csum_block_size-1)/new_hdr->csum_block_size*(new_hdr->data_csum_type & 0xFF))
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: 0);
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new_clean_entry_size = new_clean_entry_header_size + 2*new_clean_entry_bitmap_size + new_data_csum_size;
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new_entries_per_block = new_hdr->meta_block_size / new_clean_entry_size;
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for (const auto & e: meta["entries"].array_items())
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{
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uint64_t data_block = e["block"].uint64_value();
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uint64_t mb = 1 + data_block/new_entries_per_block;
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if (mb >= new_meta_len/new_hdr->meta_block_size)
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{
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free(new_meta_buf);
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new_meta_buf = NULL;
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fprintf(stderr, "Metadata (data block %ju) doesn't fit into the new area\n", data_block);
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return 1;
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}
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clean_disk_entry *new_entry = (clean_disk_entry*)(new_meta_buf +
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new_hdr->meta_block_size*mb +
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new_clean_entry_size*(data_block % new_entries_per_block));
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new_entry->oid.inode = (sscanf_json(NULL, e["pool"]) << (64-POOL_ID_BITS)) | sscanf_json(NULL, e["inode"]);
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new_entry->oid.stripe = sscanf_json(NULL, e["stripe"]);
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new_entry->version = sscanf_json(NULL, e["version"]);
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fromhexstr(e["bitmap"].string_value(), new_clean_entry_bitmap_size,
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((uint8_t*)new_entry) + sizeof(clean_disk_entry));
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fromhexstr(e["ext_bitmap"].string_value(), new_clean_entry_bitmap_size,
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((uint8_t*)new_entry) + sizeof(clean_disk_entry) + new_clean_entry_bitmap_size);
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if (new_hdr->version == BLOCKSTORE_META_FORMAT_V2)
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{
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if (new_hdr->data_csum_type != 0)
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{
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fromhexstr(e["data_csum"].string_value(), new_data_csum_size,
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((uint8_t*)new_entry) + sizeof(clean_disk_entry) + 2*new_clean_entry_bitmap_size);
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}
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uint32_t *new_entry_csum = (uint32_t*)(((uint8_t*)new_entry) + sizeof(clean_disk_entry) +
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2*new_clean_entry_bitmap_size + new_data_csum_size);
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*new_entry_csum = crc32c(0, new_entry, new_clean_entry_size - 4);
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}
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}
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int r = resize_write_new_meta();
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free(new_meta_buf);
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new_meta_buf = NULL;
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return r;
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}
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