170 lines
6.2 KiB
C++
170 lines
6.2 KiB
C++
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 (see README.md for details)
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#define _LARGEFILE64_SOURCE
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include <errno.h>
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#include <assert.h>
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#include <stdio.h>
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#include "blockstore_impl.h"
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#include "osd_id.h"
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#include "rw_blocking.h"
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struct meta_dumper_t
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{
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char *meta_device;
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uint32_t meta_block_size;
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uint64_t meta_offset;
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uint64_t meta_len;
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uint64_t meta_pos;
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int fd;
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int dump();
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};
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int main(int argc, char *argv[])
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{
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meta_dumper_t self = { 0 };
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int b = 1;
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if (argc < b+4)
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{
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printf("USAGE: %s <meta_file> <meta_block_size> <offset> <size>\n", argv[0]);
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return 1;
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}
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self.meta_device = argv[b];
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self.meta_block_size = strtoul(argv[b+1], NULL, 10);
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self.meta_offset = strtoull(argv[b+2], NULL, 10);
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self.meta_len = strtoull(argv[b+3], NULL, 10);
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return self.dump();
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}
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int meta_dumper_t::dump()
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{
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if (this->meta_block_size % DIRECT_IO_ALIGNMENT)
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{
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printf("Invalid metadata block size\n");
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return 1;
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}
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this->fd = open(this->meta_device, O_DIRECT|O_RDONLY);
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if (this->fd == -1)
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{
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printf("Failed to open metadata device\n");
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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 % this->meta_block_size)
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buf_size = 8*this->meta_block_size;
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if (buf_size > this->meta_len)
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buf_size = this->meta_len;
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void *data = memalign_or_die(MEM_ALIGNMENT, buf_size);
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lseek64(this->fd, this->meta_offset, 0);
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read_blocking(this->fd, data, buf_size);
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// Check superblock
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blockstore_meta_header_v1_t *hdr = (blockstore_meta_header_v1_t *)data;
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if (hdr->zero == 0 &&
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hdr->magic == BLOCKSTORE_META_MAGIC_V1 &&
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hdr->version == BLOCKSTORE_META_VERSION_V1)
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{
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// Vitastor 0.6-0.7 - static array of clean_disk_entry with bitmaps
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if (hdr->meta_block_size != this->meta_block_size)
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{
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printf("Using block size of %u bytes based on information from the superblock\n", hdr->meta_block_size);
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this->meta_block_size = hdr->meta_block_size;
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if (buf_size % this->meta_block_size)
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{
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buf_size = 8*this->meta_block_size;
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free(data);
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data = memalign_or_die(MEM_ALIGNMENT, buf_size);
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}
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}
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this->meta_offset += this->meta_block_size;
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this->meta_len -= this->meta_block_size;
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uint64_t clean_entry_bitmap_size = hdr->data_block_size / hdr->bitmap_granularity / 8;
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uint64_t clean_entry_size = sizeof(clean_disk_entry) + 2*clean_entry_bitmap_size;
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uint64_t block_num = 0;
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printf(
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"{\"version\":\"0.6\",\"meta_block_size\":%u,\"data_block_size\":%u,\"bitmap_granularity\":%u,\"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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bool first = true;
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lseek64(this->fd, this->meta_offset, 0);
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while (this->meta_pos < this->meta_len)
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{
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uint64_t read_len = buf_size < this->meta_len-this->meta_pos ? buf_size : this->meta_len-this->meta_pos;
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read_blocking(this->fd, data, read_len);
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this->meta_pos += read_len;
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for (uint64_t blk = 0; blk < read_len; blk += this->meta_block_size)
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{
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for (uint64_t ioff = 0; ioff < this->meta_block_size-clean_entry_size; ioff += clean_entry_size, block_num++)
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{
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clean_disk_entry *entry = (clean_disk_entry*)(data + blk + ioff);
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if (entry->oid.inode)
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{
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printf(
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#define ENTRY_FMT "{\"block\":%lu,\"pool\":%u,\"inode\":%lu,\"stripe\":%lu,\"version\":%lu,\"bitmap\":\""
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(first ? 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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first = false;
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for (uint64_t i = 0; i < clean_entry_bitmap_size; i++)
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{
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printf("%02x", entry->bitmap[i]);
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}
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printf("\",\"ext_bitmap\":\"");
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for (uint64_t i = 0; i < clean_entry_bitmap_size; i++)
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{
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printf("%02x", entry->bitmap[clean_entry_bitmap_size + i]);
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}
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printf("\"}");
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}
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}
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}
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}
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printf("\n]}\n");
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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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uint64_t clean_entry_size = sizeof(clean_disk_entry);
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uint64_t block_num = 0;
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printf("{\"version\":\"0.5\",\"meta_block_size\":%u,\"entries\":[\n", this->meta_block_size);
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bool first = true;
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while (this->meta_pos < this->meta_len)
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{
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uint64_t read_len = buf_size < this->meta_len-this->meta_pos ? buf_size : this->meta_len-this->meta_pos;
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read_blocking(this->fd, data, read_len);
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this->meta_pos += read_len;
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for (uint64_t blk = 0; blk < read_len; blk += this->meta_block_size)
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{
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for (uint64_t ioff = 0; ioff < this->meta_block_size-clean_entry_size; ioff += clean_entry_size, block_num++)
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{
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clean_disk_entry *entry = (clean_disk_entry*)(data + blk + ioff);
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if (entry->oid.inode)
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{
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printf(
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#define ENTRY_FMT "{\"block\":%lu,\"pool\":%u,\"inode\":%lu,\"stripe\":%lu,\"version\":%lu}"
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(first ? 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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first = false;
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}
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}
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}
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}
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printf("\n]}\n");
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}
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free(data);
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close(this->fd);
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return 0;
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}
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