170 lines
5.7 KiB
C++
170 lines
5.7 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 "object_id.h"
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#include "osd_id.h"
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// "VITAstor"
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#define BLOCKSTORE_META_MAGIC_V1 0x726F747341544956l
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#define BLOCKSTORE_META_VERSION_V1 1
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#define DIRECT_IO_ALIGNMENT 512
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#define MEM_ALIGNMENT 4096
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struct __attribute__((__packed__)) clean_disk_entry_v0_t
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{
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object_id oid;
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uint64_t version;
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uint8_t bitmap[];
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};
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struct __attribute__((__packed__)) blockstore_meta_header_v1_t
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{
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uint64_t zero;
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uint64_t magic;
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uint64_t version;
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uint32_t meta_block_size;
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uint32_t data_block_size;
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uint32_t bitmap_granularity;
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};
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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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};
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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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if (self.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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self.fd = open(self.meta_device, O_DIRECT|O_RDONLY);
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if (self.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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// Read all metadata into memory
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void *data = memalign(MEM_ALIGNMENT, self.meta_len);
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if (!data)
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{
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printf("Failed to allocate %lu MB of memory\n", self.meta_len/1024/1024);
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close(self.fd);
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return 1;
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}
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while (self.meta_pos < self.meta_len)
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{
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int r = pread(self.fd, data+self.meta_pos, self.meta_len-self.meta_pos, self.meta_offset+self.meta_pos);
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assert(r > 0);
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self.meta_pos += r;
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}
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close(self.fd);
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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_v0_t with bitmaps
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if (hdr->meta_block_size != self.meta_block_size)
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{
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printf("Using block size %u bytes based on information from the superblock\n", hdr->meta_block_size);
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self.meta_block_size = hdr->meta_block_size;
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}
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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_v0_t) + 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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for (uint64_t meta_pos = self.meta_block_size; meta_pos < self.meta_len; meta_pos += self.meta_block_size)
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{
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for (uint64_t ioff = 0; ioff < self.meta_block_size-clean_entry_size; ioff += clean_entry_size, block_num++)
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{
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clean_disk_entry_v0_t *entry = (clean_disk_entry_v0_t*)(data + meta_pos + 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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printf("]}\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_v0_t
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uint64_t clean_entry_size = sizeof(clean_disk_entry_v0_t);
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uint64_t block_num = 0;
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printf("{\"version\":\"0.5\",\"meta_block_size\":%u,\"entries\":[\n", self.meta_block_size);
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bool first = true;
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for (uint64_t meta_pos = 0; meta_pos < self.meta_len; meta_pos += self.meta_block_size)
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{
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for (uint64_t ioff = 0; ioff < self.meta_block_size-clean_entry_size; ioff += clean_entry_size, block_num++)
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{
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clean_disk_entry_v0_t *entry = (clean_disk_entry_v0_t*)(data + meta_pos + 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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printf("]}\n");
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}
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free(data);
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}
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