1717 lines
60 KiB
C++
1717 lines
60 KiB
C++
// Metadata storage version 3 ("heap")
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// Copyright (c) Vitaliy Filippov, 2025+
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// License: VNPL-1.1 (see README.md for details)
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#include "blockstore_heap.h"
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#include "../util/allocator.h"
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#include "../util/crc32c.h"
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#include "../util/malloc_or_die.h"
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#define BS_HEAP_FREE_MVCC 1
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#define BS_HEAP_FREE_MAIN 2
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heap_write_t *heap_write_t::next(blockstore_heap_t *heap)
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{
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return (heap_write_t*)((uint8_t*)this + get_size(heap));
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}
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uint32_t heap_write_t::get_size(blockstore_heap_t *heap)
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{
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return (sizeof(heap_write_t) +
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heap->dsk->clean_entry_bitmap_size +
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((flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE
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? heap->dsk->clean_entry_bitmap_size
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: 0) +
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get_csum_size(heap));
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}
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uint32_t heap_write_t::get_csum_size(blockstore_heap_t *heap)
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{
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if (!heap->dsk->csum_block_size)
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{
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return ((flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE ? 4 : 0);
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}
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return ((offset+len+heap->dsk->csum_block_size-1)/heap->dsk->csum_block_size - offset/heap->dsk->csum_block_size)
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* (heap->dsk->data_csum_type & 0xFF);
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}
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bool heap_write_t::needs_recheck(blockstore_heap_t *heap)
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{
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return len > 0 && lsn >= heap->compacted_lsn && (flags == (BS_HEAP_SMALL_WRITE|BS_HEAP_STABLE) || flags == BS_HEAP_SMALL_WRITE);
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}
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bool heap_write_t::needs_compact(uint64_t compacted_lsn)
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{
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return lsn > compacted_lsn && flags == (BS_HEAP_SMALL_WRITE|BS_HEAP_STABLE);
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}
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bool heap_write_t::is_compacted(uint64_t compacted_lsn)
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{
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return lsn <= compacted_lsn && flags == (BS_HEAP_SMALL_WRITE|BS_HEAP_STABLE);
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}
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bool heap_write_t::can_be_collapsed(blockstore_heap_t *heap)
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{
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return !heap->dsk->csum_block_size || heap->dsk->csum_block_size == heap->dsk->bitmap_granularity ||
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!(offset % heap->dsk->csum_block_size) && !(len % heap->dsk->csum_block_size);
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}
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bool heap_write_t::is_allowed_before_compacted(uint64_t compacted_lsn, bool is_last_entry)
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{
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return lsn <= compacted_lsn && flags == ((is_last_entry ? BS_HEAP_BIG_WRITE : BS_HEAP_SMALL_WRITE) | BS_HEAP_STABLE);
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}
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uint8_t *heap_write_t::get_ext_bitmap(blockstore_heap_t *heap)
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{
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return ((uint8_t*)this + sizeof(heap_write_t));
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}
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uint8_t *heap_write_t::get_int_bitmap(blockstore_heap_t *heap)
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{
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if ((flags & BS_HEAP_TYPE) != BS_HEAP_BIG_WRITE || !len)
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return NULL;
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return ((uint8_t*)this + sizeof(heap_write_t) + heap->dsk->clean_entry_bitmap_size);
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}
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uint8_t *heap_write_t::get_checksums(blockstore_heap_t *heap)
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{
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if (!heap->dsk->csum_block_size || !len)
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return NULL;
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if ((flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE)
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return ((uint8_t*)this + sizeof(heap_write_t) + heap->dsk->clean_entry_bitmap_size);
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if ((flags & BS_HEAP_TYPE) != BS_HEAP_BIG_WRITE)
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return NULL;
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return ((uint8_t*)this + sizeof(heap_write_t) + 2*heap->dsk->clean_entry_bitmap_size);
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}
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uint32_t *heap_write_t::get_checksum(blockstore_heap_t *heap)
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{
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if (heap->dsk->csum_block_size || (flags & BS_HEAP_TYPE) != BS_HEAP_SMALL_WRITE || !len)
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return NULL;
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return (uint32_t*)((uint8_t*)this + sizeof(heap_write_t) + heap->dsk->clean_entry_bitmap_size);
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}
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heap_object_t *heap_object_t::next()
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{
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return (heap_object_t*)((uint8_t*)this + size);
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}
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heap_write_t *heap_object_t::get_writes()
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{
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return (heap_write_t*)((uint8_t*)this + sizeof(heap_object_t));
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}
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uint32_t heap_object_t::calc_crc32c()
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{
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return ::crc32c(0, (uint8_t*)&inode, size - ((uint8_t*)(&inode) - (uint8_t*)this));
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}
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uint64_t blockstore_heap_t::get_pg_id(inode_t inode, uint64_t stripe)
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{
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uint64_t pg_num = 0;
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uint64_t pool_id = (inode >> (64-POOL_ID_BITS));
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auto sh_it = pool_shard_settings.find(pool_id);
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if (sh_it != pool_shard_settings.end())
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{
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// like map_to_pg()
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pg_num = (stripe / sh_it->second.pg_stripe_size) % sh_it->second.pg_count + 1;
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}
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return ((pool_id << (64-POOL_ID_BITS)) | pg_num);
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}
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blockstore_heap_t::blockstore_heap_t(blockstore_disk_t *dsk, uint8_t *buffer_area, int log_level):
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dsk(dsk),
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buffer_area(buffer_area),
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log_level(log_level),
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meta_block_count(dsk->meta_area_size/dsk->meta_block_size-1), // first block is the superblock
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target_block_free_space(dsk->meta_block_target_free_space),
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max_write_entry_size(sizeof(heap_write_t) + 2*dsk->clean_entry_bitmap_size +
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(dsk->csum_block_size ? dsk->data_block_size/dsk->csum_block_size*(dsk->data_csum_type & 0xFF) : 4 /*sizeof crc32c*/))
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{
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assert(target_block_free_space < dsk->meta_block_size);
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meta_alloc = new allocator_t(meta_block_count);
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block_info.resize(meta_block_count);
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buffer_by_end.insert((heap_extent_t){ .start = 0, .end = dsk->journal_len });
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buffer_by_size.insert((heap_extent_t){ .start = 0, .end = dsk->journal_len });
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data_alloc = new allocator_t(dsk->block_count);
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if (!target_block_free_space)
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target_block_free_space = 800;
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}
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blockstore_heap_t::~blockstore_heap_t()
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{
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for (auto & inf: block_info)
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{
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if (inf.data)
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{
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free(inf.data);
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}
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}
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block_info.clear();
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for (auto & mvcc: object_mvcc)
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{
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if (mvcc.second.entry_copy)
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{
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free(mvcc.second.entry_copy);
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}
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}
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object_mvcc.clear();
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if (meta_alloc)
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{
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delete meta_alloc;
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}
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if (data_alloc)
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{
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delete data_alloc;
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}
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}
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// set initially compacted lsn - should be done before loading
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void blockstore_heap_t::set_compacted_lsn(uint64_t compacted_lsn)
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{
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assert(!next_lsn || next_lsn >= compacted_lsn);
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this->compacted_lsn = compacted_lsn;
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}
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uint64_t blockstore_heap_t::get_compacted_lsn()
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{
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return compacted_lsn;
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}
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// EASY PEASY LEMON SQUEEZIE
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uint64_t blockstore_heap_t::load_blocks(uint64_t disk_offset, uint64_t size, uint8_t *buf)
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{
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uint64_t entries_loaded = 0;
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for (uint64_t buf_offset = 0; buf_offset < size; buf_offset += dsk->meta_block_size)
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{
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uint32_t block_num = (disk_offset + buf_offset) / dsk->meta_block_size;
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assert(block_num < block_info.size());
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uint32_t virtual_free_space = 0;
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uint32_t block_offset = 0;
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uint32_t block_end = dsk->meta_block_size - sizeof(heap_object_t);
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uint32_t src_offset = 0;
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while (block_offset < block_end)
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{
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heap_object_t *obj = (heap_object_t *)(buf + buf_offset + block_offset);
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if (!obj->size)
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{
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break;
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}
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if (obj->size < sizeof(heap_object_t))
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{
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fprintf(stderr, "Warning: Object is too small in metadata block %u at %u (%u bytes), skipping the rest of block\n",
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block_num, src_offset, obj->size);
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skip_block:
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if (fail_on_warn)
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abort();
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if (block_offset > 0)
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memset((void*)obj, 0, dsk->meta_block_size-block_offset);
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break;
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}
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if (obj->size > dsk->meta_block_size-block_offset)
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{
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fprintf(stderr, "Warning: Object is too large in metadata block %u at %u (%u bytes), skipping the rest of block\n",
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block_num, src_offset, obj->size);
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goto skip_block;
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}
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uint32_t expected_crc32c = obj->calc_crc32c();
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if (obj->crc32c != expected_crc32c)
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{
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fprintf(stderr, "Warning: Object is corrupt in metadata block %u at %u (crc32c mismatch: expected %08x, got %08x), skipping\n",
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block_num, src_offset, expected_crc32c, obj->crc32c);
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skip_object:
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uint32_t obj_size = obj->size;
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src_offset += obj_size;
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uint32_t to_copy = dsk->meta_block_size-block_offset-obj_size;
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memmove(obj, (uint8_t*)obj + obj_size, to_copy);
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continue;
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}
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if (!obj->write_count)
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{
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fprintf(stderr, "Warning: Object in metadata block %u at %u does not contain writes, skipping\n", block_num, src_offset);
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if (fail_on_warn)
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abort();
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goto skip_object;
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}
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uint64_t to_compact = 0;
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bool to_recheck = false;
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heap_write_t *wr = obj->get_writes();
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uint32_t calc_obj_size = sizeof(heap_object_t);
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uint32_t remove_entry_bytes = 0;
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uint32_t remove_entry_count = 0;
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uint64_t remove_lsn = 0;
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for (uint16_t wr_i = 0; wr_i < obj->write_count; wr_i++)
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{
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auto sz = wr->get_size(this);
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calc_obj_size += sz;
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if (calc_obj_size > obj->size)
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{
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fprintf(stderr, "Warning: Object write entries exceed object size in metadata block %u at %u, skipping object\n",
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block_num, src_offset);
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if (fail_on_warn)
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abort();
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goto skip_object;
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}
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if (wr->needs_recheck(this))
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{
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if (!buffer_area)
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{
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to_recheck = true;
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}
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// recheck small write data immediately
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else if (!calc_checksums(wr, buffer_area + wr->location, false))
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{
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// entry is invalid (not fully written before OSD crash) - remove it and all newer (previous) entries too
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remove_entry_bytes = calc_obj_size - sizeof(heap_object_t);
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remove_entry_count = wr_i+1;
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remove_lsn = wr->lsn;
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}
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}
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if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE)
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{
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use_buffer_area(obj->inode, wr->location, wr->len);
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}
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else if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
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{
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// Mark data block as used
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use_data(obj->inode, wr->location);
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}
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if (wr->needs_compact(this->compacted_lsn))
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{
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to_compact = to_compact ? to_compact : wr->lsn;
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}
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else if (wr->is_compacted(this->compacted_lsn))
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{
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if (wr->can_be_collapsed(this))
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{
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virtual_free_space += sz;
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}
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else
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{
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// We can't just collapse the object entry when csum_block_size is larger
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// than bitmap_granularity, so we add the object into the compact queue
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to_compact = to_compact ? to_compact : wr->lsn;
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}
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}
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wr = (heap_write_t*)((uint8_t*)wr + sz);
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}
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if (obj->write_count == remove_entry_count)
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{
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// Skip the whole object
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goto skip_object;
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}
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uint64_t lsn = obj->get_writes()->lsn;
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auto oid = (object_id){ .inode = obj->inode, .stripe = obj->stripe };
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uint32_t dup_block;
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heap_object_t *dup_obj = read_entry(oid, &dup_block);
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if (dup_obj != NULL)
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{
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if (dup_obj->get_writes()->lsn >= lsn)
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{
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// Object is duplicated on disk
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fprintf(stderr, "Warning: Object in metadata block %u at %u is an older duplicate, skipping\n",
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block_num, src_offset);
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free_object_space(obj->inode, obj->get_writes(), (heap_write_t*)obj->next());
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goto skip_object;
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}
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else
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{
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fprintf(stderr, "Warning: Object in metadata block %u at %u is a newer duplicate, overriding\n",
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block_num, src_offset);
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free_object_space(dup_obj->inode, dup_obj->get_writes(), (heap_write_t*)dup_obj->next());
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compact_block(dup_block, oid);
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}
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}
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if (remove_entry_count)
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{
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if (log_level > 3)
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{
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fprintf(stderr, "Notice: %u unfinished writes to %jx:%jx v%jx since lsn %ju, rolling back\n",
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remove_entry_count, obj->inode, obj->stripe, obj->get_writes()->version, remove_lsn);
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}
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uint32_t to_copy = dsk->meta_block_size-block_offset-obj->size + obj->size-sizeof(heap_object_t)-remove_entry_bytes;
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if (to_copy < remove_entry_bytes)
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{
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memset((uint8_t*)obj + sizeof(heap_object_t), 0, remove_entry_bytes);
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}
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memmove((uint8_t*)obj + sizeof(heap_object_t), (uint8_t*)obj + sizeof(heap_object_t) + remove_entry_bytes, to_copy);
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obj->size -= remove_entry_bytes;
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obj->write_count -= remove_entry_count;
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obj->crc32c = obj->calc_crc32c();
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src_offset += remove_entry_bytes;
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}
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if (lsn > next_lsn)
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{
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next_lsn = lsn;
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}
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if (to_compact)
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{
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if (compact_queue_lsn.find(oid) == compact_queue_lsn.end())
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{
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compact_queue.push_back(oid);
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}
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compact_queue_lsn[oid] = to_compact;
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}
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if (to_recheck)
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{
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recheck_queue.push_back(oid);
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}
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// btree_map<ui64, ui32> anyway stores std::pair<ui64, ui32>'s of 16 bytes size
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// so we can store block_offset in it too
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block_index[get_pg_id(obj->inode, obj->stripe)][obj->inode][obj->stripe] = (uint32_t)block_num*dsk->meta_block_size + block_offset;
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entries_loaded += obj->write_count;
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src_offset += obj->size;
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block_offset += obj->size;
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}
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uint8_t *copy = NULL;
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if (block_offset > 0)
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{
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// Do not store free blocks in memory
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copy = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, dsk->meta_block_size);
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memcpy(copy, buf+buf_offset, block_offset);
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memset(copy+block_offset, 0, dsk->meta_block_size-block_offset);
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}
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block_info[block_num] = {
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.used_space = block_offset,
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.virtual_free_space = virtual_free_space,
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.data = copy,
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};
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if (block_offset > 0)
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{
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mark_allocated_block(block_num);
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}
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}
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return entries_loaded;
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}
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void blockstore_heap_t::finish_load()
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{
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std::sort(compact_queue.begin(), compact_queue.end(), [this](const object_id & a, const object_id & b)
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{
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return compact_queue_lsn[a] < compact_queue_lsn[b];
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});
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}
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bool blockstore_heap_t::calc_checksums(heap_write_t *wr, uint8_t *data, bool set)
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{
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if (!dsk->csum_block_size)
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{
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if ((wr->flags & BS_HEAP_TYPE) != BS_HEAP_SMALL_WRITE)
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{
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return true;
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}
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// Single checksum
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uint32_t *wr_csum = wr->get_checksum(this);
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uint32_t real_csum = crc32c(0, data, wr->len);
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if (set)
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{
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*wr_csum = real_csum;
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return true;
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}
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return ((*wr_csum) == real_csum);
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}
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return calc_block_checksums((uint32_t*)wr->get_checksums(this), data, wr->get_int_bitmap(this),
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wr->offset, wr->offset+wr->len, set, NULL);
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}
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bool blockstore_heap_t::calc_block_checksums(uint32_t *block_csums, uint8_t *data, uint8_t *bitmap, uint32_t start, uint32_t end,
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bool set, std::function<void(uint32_t, uint32_t, uint32_t)> bad_block_cb)
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{
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bool res = true;
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uint32_t pos = start;
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uint32_t block_end = (start/dsk->csum_block_size + 1)*dsk->csum_block_size;
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uint32_t block_crc = 0;
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while (pos < end)
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{
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if (bitmap)
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{
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while (pos < end && pos < block_end)
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{
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if (!bitmap[pos/dsk->bitmap_granularity/8] & (1 << ((pos/dsk->bitmap_granularity) % 8)))
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block_crc = crc32c_pad(block_crc, NULL, 0, dsk->bitmap_granularity, 0);
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else
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block_crc = crc32c(block_crc, data, dsk->bitmap_granularity);
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data += dsk->bitmap_granularity;
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pos += dsk->bitmap_granularity;
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}
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}
|
|
else
|
|
{
|
|
block_crc = crc32c(block_crc, data, (end > block_end ? block_end : end) - pos);
|
|
pos = (end > block_end ? block_end : end);
|
|
}
|
|
if (set)
|
|
{
|
|
*block_csums = block_crc;
|
|
}
|
|
else if (block_crc != *block_csums)
|
|
{
|
|
if (bad_block_cb)
|
|
{
|
|
bad_block_cb(pos-start, *block_csums, block_crc);
|
|
res = false;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
block_csums++;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
bool blockstore_heap_t::recheck_small_writes(std::function<void(uint64_t, uint64_t, uint8_t*, std::function<void()>)> read_buffer, int queue_depth)
|
|
{
|
|
if (buffer_area)
|
|
{
|
|
// Already checked
|
|
return true;
|
|
}
|
|
if (in_recheck)
|
|
{
|
|
// Recheck already entered
|
|
return false;
|
|
}
|
|
if (read_buffer)
|
|
{
|
|
recheck_cb = read_buffer;
|
|
recheck_queue_depth = queue_depth;
|
|
}
|
|
in_recheck = true;
|
|
while (recheck_queue.size() > 0 && recheck_in_progress < recheck_queue_depth)
|
|
{
|
|
object_id oid = recheck_queue.front();
|
|
recheck_queue.pop_front();
|
|
heap_object_t *obj = read_entry(oid, NULL);
|
|
assert(obj);
|
|
for (heap_write_t *wr = obj->get_writes(); wr < (heap_write_t*)obj->next(); wr = wr->next(this))
|
|
{
|
|
if (wr->needs_recheck(this))
|
|
{
|
|
recheck_in_progress++;
|
|
uint8_t *buf = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, wr->len);
|
|
recheck_cb(wr->location, wr->len, buf, [this, oid, lsn = wr->lsn, buf]()
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (obj)
|
|
{
|
|
heap_write_t *wr = obj->get_writes(), *end = (heap_write_t*)obj->next();
|
|
uint32_t wr_i = 0;
|
|
while (wr < end && wr->lsn != lsn)
|
|
{
|
|
wr = wr->next(this);
|
|
wr_i++;
|
|
}
|
|
if (wr < end && !calc_checksums(wr, buf, false))
|
|
{
|
|
// Erase all writes to the object from this one to the newest
|
|
if (log_level > 3)
|
|
{
|
|
fprintf(stderr, "Notice: %u unfinished writes to %jx:%jx v%jx since lsn %ju, rolling back\n",
|
|
wr_i+1, obj->inode, obj->stripe, obj->get_writes()->version, wr->lsn);
|
|
}
|
|
auto & inf = block_info.at(block_num);
|
|
unmark_allocated_block(block_num);
|
|
uint32_t to_move, to_erase;
|
|
obj->write_count -= wr_i+1;
|
|
if (!obj->write_count)
|
|
{
|
|
to_erase = obj->size;
|
|
to_move = inf.used_space - ((uint8_t*)obj->next() - inf.data);
|
|
memmove((uint8_t*)obj, wr->next(this), to_move);
|
|
}
|
|
else
|
|
{
|
|
to_erase = (uint8_t*)wr->next(this) - (uint8_t*)obj->get_writes();
|
|
to_move = inf.used_space - ((uint8_t*)wr->next(this) - inf.data);
|
|
memmove((uint8_t*)obj->get_writes(), wr->next(this), to_move);
|
|
obj->size -= to_erase;
|
|
obj->crc32c = obj->calc_crc32c();
|
|
}
|
|
memset(inf.data+inf.used_space-to_erase, 0, to_erase);
|
|
inf.used_space -= to_erase;
|
|
mark_allocated_block(block_num);
|
|
reindex_block(block_num, obj);
|
|
}
|
|
}
|
|
free(buf);
|
|
recheck_in_progress--;
|
|
recheck_small_writes(NULL, 0);
|
|
});
|
|
}
|
|
}
|
|
}
|
|
in_recheck = false;
|
|
if (!recheck_queue.size() && !recheck_in_progress)
|
|
{
|
|
auto cb = std::move(recheck_cb);
|
|
recheck_queue_depth = 0;
|
|
if (cb)
|
|
cb(0, 0, NULL, NULL);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void blockstore_heap_t::reshard(pool_id_t pool, uint32_t pg_count, uint32_t pg_stripe_size)
|
|
{
|
|
auto & pool_settings = pool_shard_settings[pool];
|
|
if (pool_settings.pg_count == pg_count && pool_settings.pg_stripe_size == pg_stripe_size)
|
|
{
|
|
return;
|
|
}
|
|
uint64_t pool_id = (uint64_t)pool;
|
|
std::map<uint64_t, std::map<inode_t, btree::btree_map<uint64_t, uint64_t>>> new_shards;
|
|
auto sh_it = block_index.lower_bound((pool_id << (64-POOL_ID_BITS)));
|
|
while (sh_it != block_index.end() && (sh_it->first >> (64-POOL_ID_BITS)) == pool_id)
|
|
{
|
|
for (auto & inode_pair: sh_it->second)
|
|
{
|
|
inode_t inode = inode_pair.first;
|
|
for (auto & pair: inode_pair.second)
|
|
{
|
|
// like map_to_pg()
|
|
uint64_t pg_num = (pair.first / pg_stripe_size) % pg_count + 1;
|
|
uint64_t shard_id = (pool_id << (64-POOL_ID_BITS)) | pg_num;
|
|
new_shards[shard_id][inode][pair.first] = std::move(pair.second);
|
|
}
|
|
}
|
|
block_index.erase(sh_it++);
|
|
}
|
|
for (sh_it = new_shards.begin(); sh_it != new_shards.end(); sh_it++)
|
|
{
|
|
auto & to = block_index[sh_it->first];
|
|
to.swap(sh_it->second);
|
|
}
|
|
pool_settings = (pool_shard_settings_t){
|
|
.pg_count = pg_count,
|
|
.pg_stripe_size = pg_stripe_size,
|
|
};
|
|
}
|
|
|
|
heap_object_t *blockstore_heap_t::lock_and_read_entry(object_id oid, uint64_t & lsn)
|
|
{
|
|
auto obj = read_entry(oid, NULL);
|
|
if (!obj)
|
|
{
|
|
return NULL;
|
|
}
|
|
lsn = obj->get_writes()->lsn;
|
|
auto & mvcc = object_mvcc[(heap_object_lsn_t){ .oid = oid, .lsn = lsn }];
|
|
mvcc.readers++;
|
|
if (mvcc.entry_copy)
|
|
{
|
|
return mvcc.entry_copy;
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
heap_object_t *blockstore_heap_t::read_locked_entry(object_id oid, uint64_t lsn)
|
|
{
|
|
auto mvcc_it = object_mvcc.find((heap_object_lsn_t){ .oid = oid, .lsn = lsn });
|
|
if (mvcc_it == object_mvcc.end())
|
|
{
|
|
return NULL;
|
|
}
|
|
if (mvcc_it->second.entry_copy)
|
|
{
|
|
return mvcc_it->second.entry_copy;
|
|
}
|
|
return read_entry(oid, NULL);
|
|
}
|
|
|
|
bool blockstore_heap_t::unlock_entry(object_id oid, uint64_t lsn)
|
|
{
|
|
auto mvcc_it = object_mvcc.find((heap_object_lsn_t){ .oid = oid, .lsn = lsn });
|
|
if (mvcc_it == object_mvcc.end())
|
|
{
|
|
return false;
|
|
}
|
|
mvcc_it->second.readers--;
|
|
if (!mvcc_it->second.readers)
|
|
{
|
|
if (mvcc_it->second.entry_copy)
|
|
{
|
|
// Free refcounted data & buffer blocks
|
|
heap_object_t *obj = (heap_object_t*)mvcc_it->second.entry_copy;
|
|
free_object_space(obj->inode, obj->get_writes(), (heap_write_t*)obj->next(), BS_HEAP_FREE_MVCC);
|
|
bool is_last_mvcc = true;
|
|
if (mvcc_it != object_mvcc.end())
|
|
{
|
|
// object_mvcc may contain multiple copied entries, but always in a whole sequence
|
|
auto next_it = std::next(mvcc_it);
|
|
if (next_it->first.oid == oid && next_it->second.entry_copy)
|
|
is_last_mvcc = false;
|
|
}
|
|
if (is_last_mvcc && mvcc_it != object_mvcc.begin())
|
|
{
|
|
auto prev_it = std::prev(mvcc_it);
|
|
if (prev_it->first.oid == oid && prev_it->second.entry_copy)
|
|
is_last_mvcc = false;
|
|
}
|
|
if (is_last_mvcc)
|
|
{
|
|
// Free data references from the newest object version when the last MVCC is freed
|
|
heap_object_t *new_obj = read_entry(oid, NULL);
|
|
if (new_obj)
|
|
{
|
|
free_object_space(new_obj->inode, new_obj->get_writes(), (heap_write_t*)new_obj->next(), BS_HEAP_FREE_MAIN);
|
|
}
|
|
}
|
|
free(mvcc_it->second.entry_copy);
|
|
}
|
|
object_mvcc.erase(mvcc_it);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
heap_object_t *blockstore_heap_t::read_entry(object_id oid, uint32_t *block_num_ptr, bool for_update)
|
|
{
|
|
auto pool_pg_id = get_pg_id(oid.inode, oid.stripe);
|
|
auto & pg_index = block_index[pool_pg_id];
|
|
auto inode_it = pg_index.find(oid.inode);
|
|
if (inode_it == pg_index.end())
|
|
{
|
|
return NULL;
|
|
}
|
|
auto stripe_it = inode_it->second.find(oid.stripe);
|
|
if (stripe_it == inode_it->second.end())
|
|
{
|
|
return NULL;
|
|
}
|
|
uint64_t block_pos = stripe_it->second;
|
|
uint32_t block_num = block_pos / dsk->meta_block_size;
|
|
assert(block_info[block_num].data != NULL);
|
|
heap_object_t *obj = (heap_object_t*)(block_info[block_num].data + (block_pos % dsk->meta_block_size));
|
|
assert(obj->inode == oid.inode && obj->stripe == oid.stripe);
|
|
if (block_num_ptr)
|
|
{
|
|
*block_num_ptr = block_num;
|
|
}
|
|
if (for_update)
|
|
{
|
|
mvcc_save_copy(obj);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
void blockstore_heap_t::get_compact_range(heap_object_t *obj, uint64_t max_lsn, heap_write_t **begin_wr, heap_write_t **end_wr)
|
|
{
|
|
*begin_wr = NULL;
|
|
*end_wr = NULL;
|
|
heap_write_t *wr = obj->get_writes();
|
|
for (uint16_t wr_i = 0; wr_i < obj->write_count; wr_i++, wr = wr->next(this))
|
|
{
|
|
if (wr->is_compacted(max_lsn))
|
|
{
|
|
*begin_wr = wr;
|
|
}
|
|
if (*begin_wr)
|
|
{
|
|
bool is_last = (wr_i == obj->write_count-1);
|
|
if (is_last)
|
|
{
|
|
*end_wr = wr;
|
|
}
|
|
// all subsequent small write entries must also be compacted
|
|
assert(wr->is_allowed_before_compacted(UINT64_MAX, is_last));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool blockstore_heap_t::compact_object_to(heap_object_t *obj, uint64_t compact_lsn, heap_object_t *to_obj, uint8_t *new_csums)
|
|
{
|
|
heap_write_t *wr = obj->get_writes();
|
|
assert(obj->write_count <= 1024);
|
|
heap_write_t *compacted_wrs[obj->write_count];
|
|
int compacted_wr_count = 0;
|
|
bool has_more = false;
|
|
bool skip = false;
|
|
heap_write_t *big_wr = NULL;
|
|
for (uint16_t wr_i = 0; wr_i < obj->write_count; wr_i++)
|
|
{
|
|
if (wr->is_compacted(compact_lsn))
|
|
{
|
|
compacted_wrs[compacted_wr_count++] = wr;
|
|
}
|
|
else if (wr->needs_compact(compact_lsn))
|
|
{
|
|
has_more = true;
|
|
}
|
|
if (compacted_wr_count)
|
|
{
|
|
bool is_last = (wr_i == obj->write_count-1);
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
big_wr = wr;
|
|
}
|
|
// all subsequent small write entries must also be compacted
|
|
assert(wr->is_allowed_before_compacted(compact_lsn, is_last));
|
|
if (!new_csums && !wr->can_be_collapsed(this))
|
|
{
|
|
skip = true;
|
|
}
|
|
}
|
|
wr = wr->next(this);
|
|
}
|
|
if (compacted_wr_count == 0 || skip)
|
|
{
|
|
return false;
|
|
}
|
|
if (!has_more)
|
|
{
|
|
compact_queue_lsn.erase((object_id){ .inode = obj->inode, .stripe = obj->stripe });
|
|
}
|
|
free_object_space(obj->inode, compacted_wrs[0], big_wr);
|
|
// Generate a collapsed BIG_WRITE entry
|
|
uint8_t collapsed_buf[max_write_entry_size];
|
|
heap_write_t *collapsed_wr = (heap_write_t*)collapsed_buf;
|
|
collapsed_wr->lsn = compacted_wrs[0]->lsn;
|
|
collapsed_wr->version = compacted_wrs[0]->version;
|
|
collapsed_wr->offset = big_wr->offset;
|
|
collapsed_wr->len = big_wr->offset + big_wr->len;
|
|
collapsed_wr->location = big_wr->location;
|
|
collapsed_wr->flags = BS_HEAP_BIG_WRITE|BS_HEAP_STABLE;
|
|
memcpy(collapsed_wr->get_ext_bitmap(this), compacted_wrs[0]->get_ext_bitmap(this), dsk->clean_entry_bitmap_size);
|
|
memcpy(collapsed_wr->get_int_bitmap(this), big_wr->get_int_bitmap(this), dsk->clean_entry_bitmap_size);
|
|
for (int i = 0; i < compacted_wr_count; i++)
|
|
{
|
|
auto cur_wr = compacted_wrs[i];
|
|
if (collapsed_wr->offset > cur_wr->offset)
|
|
{
|
|
collapsed_wr->offset = cur_wr->offset;
|
|
}
|
|
if (collapsed_wr->len < cur_wr->offset+cur_wr->len)
|
|
{
|
|
collapsed_wr->len = cur_wr->offset+cur_wr->len;
|
|
}
|
|
}
|
|
collapsed_wr->len -= collapsed_wr->offset;
|
|
assert(collapsed_wr->get_size(this) <= max_write_entry_size);
|
|
uint8_t *int_bmp = collapsed_wr->get_int_bitmap(this);
|
|
uint8_t *csums = collapsed_wr->get_checksums(this);
|
|
const uint32_t csum_size = (dsk->data_csum_type & 0xFF);
|
|
for (int i = compacted_wr_count-1; i >= 0; i--)
|
|
{
|
|
auto cur_wr = compacted_wrs[i];
|
|
bitmap_set(int_bmp, cur_wr->offset, cur_wr->len, dsk->bitmap_granularity);
|
|
// copy checksums
|
|
if (csums && !new_csums)
|
|
{
|
|
assert(i == compacted_wr_count-1 ||
|
|
(cur_wr->offset % dsk->csum_block_size) == 0 &&
|
|
(cur_wr->len % dsk->csum_block_size) == 0);
|
|
memcpy(csums + (cur_wr->offset/dsk->csum_block_size - collapsed_wr->offset/dsk->csum_block_size)*csum_size,
|
|
cur_wr->get_checksums(this), cur_wr->len/dsk->csum_block_size*csum_size);
|
|
}
|
|
}
|
|
if (csums && new_csums)
|
|
{
|
|
memcpy(csums, new_csums, collapsed_wr->get_csum_size(this));
|
|
}
|
|
// Copy it over the old entries
|
|
uint32_t copy_wr_bytes = (uint8_t*)compacted_wrs[0] - (uint8_t*)obj;
|
|
if (to_obj != obj)
|
|
{
|
|
memmove(to_obj, obj, copy_wr_bytes);
|
|
}
|
|
memcpy((uint8_t*)to_obj + copy_wr_bytes, collapsed_wr, collapsed_wr->get_size(this));
|
|
to_obj->write_count -= compacted_wr_count;
|
|
to_obj->size = (uint8_t*)compacted_wrs[0] - (uint8_t*)obj + collapsed_wr->get_size(this);
|
|
to_obj->crc32c = to_obj->calc_crc32c();
|
|
return true;
|
|
}
|
|
|
|
void blockstore_heap_t::compact_block(uint32_t block_num, object_id skip_oid)
|
|
{
|
|
const uint8_t *data = block_info[block_num].data;
|
|
assert(data);
|
|
const heap_object_t *block_end = (heap_object_t *)((uint8_t*)data + block_info[block_num].used_space);
|
|
heap_object_t *obj = (heap_object_t *)data;
|
|
heap_object_t *to_obj = (heap_object_t *)data;
|
|
while (obj < block_end && obj->size)
|
|
{
|
|
heap_object_t *next_obj = obj->next();
|
|
if (obj->inode == skip_oid.inode && obj->stripe == skip_oid.stripe)
|
|
{
|
|
obj = next_obj;
|
|
continue;
|
|
}
|
|
bool compacted = compact_object_to(obj, compacted_lsn, to_obj, NULL);
|
|
if (to_obj != obj)
|
|
{
|
|
block_index[get_pg_id(obj->inode, obj->stripe)][obj->inode][obj->stripe] = (uint64_t)block_num*dsk->meta_block_size + ((uint8_t*)to_obj - data);
|
|
if (!compacted)
|
|
{
|
|
memmove(to_obj, obj, obj->size);
|
|
}
|
|
}
|
|
to_obj = to_obj->next();
|
|
obj = next_obj;
|
|
}
|
|
uint32_t new_used_space = (uint8_t*)to_obj - (uint8_t*)data;
|
|
if (new_used_space < block_info[block_num].used_space)
|
|
{
|
|
memset((void*)to_obj, 0, block_info[block_num].used_space - new_used_space);
|
|
}
|
|
unmark_allocated_block(block_num);
|
|
block_info[block_num].used_space = new_used_space;
|
|
block_info[block_num].virtual_free_space = 0;
|
|
mark_allocated_block(block_num);
|
|
}
|
|
|
|
int blockstore_heap_t::get_block_for_new_object(uint32_t & out_block_num)
|
|
{
|
|
// Blocks with at least target_block_free_space are tried first in number order
|
|
uint64_t block_num = meta_alloc->find_free();
|
|
if (block_num >= block_info.size())
|
|
{
|
|
// Blocks with less than target_block_free_space are tried second, in free space order
|
|
auto u_it = used_alloc_queue.begin();
|
|
if (u_it == used_alloc_queue.end() || u_it->free_space < sizeof(heap_object_t) + 2*max_write_entry_size)
|
|
{
|
|
return compact_queue.size() ? EAGAIN : ENOSPC;
|
|
}
|
|
block_num = u_it->block_num;
|
|
}
|
|
out_block_num = block_num;
|
|
return 0;
|
|
}
|
|
|
|
int blockstore_heap_t::add_object(object_id oid, heap_write_t *wr, uint32_t *modified_block)
|
|
{
|
|
// By now, initial small_writes are not allowed
|
|
if ((wr->flags & BS_HEAP_TYPE) != BS_HEAP_BIG_WRITE &&
|
|
(wr->flags & BS_HEAP_TYPE) != BS_HEAP_TOMBSTONE)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
if (!wr->version)
|
|
{
|
|
wr->version = 1;
|
|
}
|
|
uint32_t wr_size = wr->get_size(this);
|
|
// Allocate block
|
|
uint32_t block_num = 0;
|
|
int res = get_block_for_new_object(block_num);
|
|
if (res != 0)
|
|
{
|
|
return res;
|
|
}
|
|
auto & inf = block_info.at(block_num);
|
|
if (!inf.data)
|
|
{
|
|
inf.data = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, dsk->meta_block_size);
|
|
memset(inf.data, 0, dsk->meta_block_size);
|
|
}
|
|
if (modified_block)
|
|
{
|
|
*modified_block = block_num;
|
|
}
|
|
// Compact block
|
|
if (block_info[block_num].virtual_free_space)
|
|
{
|
|
compact_block(block_num, {});
|
|
}
|
|
block_index[get_pg_id(oid.inode, oid.stripe)][oid.inode][oid.stripe] = (uint64_t)block_num*dsk->meta_block_size + inf.used_space;
|
|
// and just append the object entry
|
|
heap_object_t *new_entry = (heap_object_t *)(inf.data + inf.used_space);
|
|
new_entry->inode = oid.inode;
|
|
new_entry->stripe = oid.stripe;
|
|
new_entry->write_count = 1;
|
|
heap_write_t *new_wr = new_entry->get_writes();
|
|
memcpy(new_wr, wr, wr_size);
|
|
new_wr->lsn = ++next_lsn;
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
uint8_t *int_bitmap = new_wr->get_int_bitmap(this);
|
|
memset(int_bitmap, 0, dsk->clean_entry_bitmap_size);
|
|
bitmap_set(int_bitmap, wr->offset, wr->len, dsk->bitmap_granularity);
|
|
}
|
|
if (wr->needs_compact(0) &&
|
|
compact_queue_lsn.find(oid) == compact_queue_lsn.end())
|
|
{
|
|
compact_queue.push_back(oid);
|
|
compact_queue_lsn[oid] = new_wr->lsn;
|
|
}
|
|
new_entry->size = sizeof(heap_object_t) + wr_size;
|
|
new_entry->crc32c = new_entry->calc_crc32c();
|
|
unmark_allocated_block(block_num);
|
|
inf.used_space += new_entry->size;
|
|
mark_allocated_block(block_num);
|
|
return 0;
|
|
}
|
|
|
|
heap_object_t *blockstore_heap_t::mvcc_save_copy(heap_object_t *obj)
|
|
{
|
|
auto oid = (object_id){ .inode = obj->inode, .stripe = obj->stripe };
|
|
auto lsn = obj->get_writes()->lsn;
|
|
auto mvcc_it = object_mvcc.find((heap_object_lsn_t){ .oid = oid, .lsn = lsn });
|
|
if (mvcc_it == object_mvcc.end())
|
|
{
|
|
return NULL;
|
|
}
|
|
assert(!mvcc_it->second.entry_copy);
|
|
heap_object_t *obj_copy = (heap_object_t*)malloc_or_die(obj->size);
|
|
memcpy(obj_copy, obj, obj->size);
|
|
mvcc_it->second.entry_copy = obj_copy;
|
|
uint32_t add_ref = 1;
|
|
bool for_obj = false;
|
|
// save_copy is performed when the object is modified, so object_mvcc may only
|
|
// contain 1 version with entry_copy == NULL
|
|
if (mvcc_it == object_mvcc.begin() || std::prev(mvcc_it)->first.oid != oid)
|
|
{
|
|
// Init refcounts for the copy and for the object itself, when it's the first MVCC entry
|
|
add_ref = 2;
|
|
for_obj = true;
|
|
}
|
|
for (auto wr = obj->get_writes(); wr < (heap_write_t*)obj->next(); wr = wr->next(this))
|
|
{
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
mvcc_data_refs[wr->location] += add_ref;
|
|
if (wr->flags & BS_HEAP_STABLE)
|
|
{
|
|
if (!for_obj)
|
|
{
|
|
break;
|
|
}
|
|
add_ref = 1;
|
|
}
|
|
}
|
|
else if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE)
|
|
{
|
|
mvcc_buffer_refs[wr->location] += add_ref;
|
|
}
|
|
}
|
|
return mvcc_it->second.entry_copy;
|
|
}
|
|
|
|
int blockstore_heap_t::update_object(uint32_t block_num, heap_object_t *obj, heap_write_t *wr, uint32_t *modified_block)
|
|
{
|
|
auto oid = (object_id){ .inode = obj->inode, .stripe = obj->stripe };
|
|
uint32_t wr_size = wr->get_size(this);
|
|
auto & inf = block_info.at(block_num);
|
|
assert(inf.data);
|
|
bool is_overwrite = (wr->flags == (BS_HEAP_BIG_WRITE|BS_HEAP_STABLE) || wr->flags == (BS_HEAP_TOMBSTONE|BS_HEAP_STABLE));
|
|
uint32_t new_object_size = (is_overwrite ? sizeof(heap_object_t)+wr_size : obj->size+wr_size);
|
|
if (dsk->meta_block_size-inf.used_space+inf.virtual_free_space+obj->size < new_object_size)
|
|
{
|
|
// Something in the block has to be compacted
|
|
return compact_queue.size() ? EAGAIN : ENOSPC;
|
|
}
|
|
if ((obj->get_writes()->flags & BS_HEAP_TYPE) == BS_HEAP_TOMBSTONE && !is_overwrite)
|
|
{
|
|
// Small overwrites are only allowed over live objects
|
|
return EINVAL;
|
|
}
|
|
if (!(obj->get_writes()->flags & BS_HEAP_STABLE) && (wr->flags & BS_HEAP_STABLE))
|
|
{
|
|
// Stable overwrites are not allowed over unstable
|
|
return EINVAL;
|
|
}
|
|
if (wr->version <= obj->get_writes()->version)
|
|
{
|
|
if (!wr->version)
|
|
{
|
|
wr->version = obj->get_writes()->version + 1;
|
|
}
|
|
else
|
|
{
|
|
// Overwrites with a smaller version are forbidden
|
|
return EINVAL;
|
|
}
|
|
}
|
|
if (modified_block)
|
|
{
|
|
*modified_block = block_num;
|
|
}
|
|
// Save a copy of the object
|
|
bool free_copy = false;
|
|
heap_object_t *obj_copy = mvcc_save_copy(obj);
|
|
bool tracking_active = !!obj_copy;
|
|
if (!tracking_active)
|
|
{
|
|
auto mvcc_it = object_mvcc.lower_bound((heap_object_lsn_t){ .oid = oid, .lsn = 0 });
|
|
tracking_active = (mvcc_it != object_mvcc.end() && mvcc_it->first.oid == oid && mvcc_it->second.entry_copy);
|
|
}
|
|
if (!obj_copy)
|
|
{
|
|
obj_copy = (heap_object_t*)malloc_or_die(obj->size);
|
|
memcpy(obj_copy, obj, obj->size);
|
|
free_copy = true;
|
|
}
|
|
if (tracking_active)
|
|
{
|
|
// MVCC reference tracking is in action for the object, increase the refcount
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
mvcc_data_refs[wr->location]++;
|
|
}
|
|
else if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE)
|
|
{
|
|
mvcc_buffer_refs[wr->location]++;
|
|
}
|
|
}
|
|
// Compact block, skipping the object at the same time
|
|
if (is_overwrite)
|
|
{
|
|
free_object_space(obj->inode, obj->get_writes(), (heap_write_t*)obj->next());
|
|
}
|
|
compact_block(block_num, oid);
|
|
// Remove block from allocation maps
|
|
unmark_allocated_block(block_num);
|
|
// Add the object to block again
|
|
obj = (heap_object_t*)(inf.data + inf.used_space);
|
|
memcpy(obj, obj_copy, sizeof(heap_object_t));
|
|
block_index[get_pg_id(obj->inode, obj->stripe)][obj->inode][obj->stripe] = (uint32_t)block_num*dsk->meta_block_size + inf.used_space;
|
|
heap_write_t *new_wr = obj->get_writes();
|
|
memcpy(new_wr, wr, wr_size);
|
|
new_wr->lsn = ++next_lsn;
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
uint8_t *int_bitmap = new_wr->get_int_bitmap(this);
|
|
memset(int_bitmap, 0, dsk->clean_entry_bitmap_size);
|
|
bitmap_set(int_bitmap, wr->offset, wr->len, dsk->bitmap_granularity);
|
|
}
|
|
if (wr->flags == (BS_HEAP_BIG_WRITE|BS_HEAP_STABLE) ||
|
|
wr->flags == (BS_HEAP_TOMBSTONE|BS_HEAP_STABLE))
|
|
{
|
|
obj->write_count = 1;
|
|
obj->size = sizeof(heap_object_t) + wr_size;
|
|
}
|
|
else
|
|
{
|
|
memcpy((uint8_t*)new_wr + wr_size, obj_copy->get_writes(), obj_copy->size - sizeof(heap_object_t));
|
|
obj->write_count++;
|
|
obj->size += wr_size;
|
|
}
|
|
if (wr->needs_compact(0) &&
|
|
compact_queue_lsn.find(oid) == compact_queue_lsn.end())
|
|
{
|
|
compact_queue.push_back(oid);
|
|
compact_queue_lsn[oid] = new_wr->lsn;
|
|
}
|
|
obj->crc32c = obj->calc_crc32c();
|
|
inf.used_space += obj->size;
|
|
mark_allocated_block(block_num);
|
|
if (free_copy)
|
|
{
|
|
free(obj_copy);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int blockstore_heap_t::post_write(object_id oid, heap_write_t *wr, uint32_t *modified_block)
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (!obj)
|
|
{
|
|
return add_object(oid, wr, modified_block);
|
|
}
|
|
return update_object(block_num, obj, wr, modified_block);
|
|
}
|
|
|
|
int blockstore_heap_t::post_stabilize(object_id oid, uint64_t version, uint32_t *modified_block)
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (!obj)
|
|
{
|
|
// No such object
|
|
return ENOENT;
|
|
}
|
|
auto & inf = block_info.at(block_num);
|
|
assert(inf.data);
|
|
if (inf.virtual_free_space)
|
|
{
|
|
compact_block(block_num, {});
|
|
obj = read_entry(oid, &block_num);
|
|
assert(obj);
|
|
}
|
|
assert(obj->write_count > 0);
|
|
uint32_t unstable_idx = UINT32_MAX;
|
|
uint32_t unstable_big_idx = UINT32_MAX;
|
|
heap_write_t *unstable_big_wr = NULL;
|
|
heap_write_t *wr = obj->get_writes();
|
|
uint32_t wr_i;
|
|
if (wr->version < version)
|
|
{
|
|
// No such version
|
|
return ENOENT;
|
|
}
|
|
for (wr = obj->get_writes(), wr_i = 0; wr_i < obj->write_count; wr_i++, wr = wr->next(this))
|
|
{
|
|
if (!(wr->flags & BS_HEAP_STABLE) && wr->version <= version)
|
|
{
|
|
unstable_idx = wr_i;
|
|
if (unstable_big_idx == UINT32_MAX &&
|
|
((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE ||
|
|
(wr->flags & BS_HEAP_TYPE) == BS_HEAP_TOMBSTONE))
|
|
{
|
|
unstable_big_wr = wr;
|
|
unstable_big_idx = wr_i;
|
|
}
|
|
}
|
|
}
|
|
if (unstable_idx == UINT32_MAX)
|
|
{
|
|
// Version is already stable
|
|
return 0;
|
|
}
|
|
if (modified_block)
|
|
{
|
|
*modified_block = block_num;
|
|
}
|
|
// Save a copy of the object
|
|
mvcc_save_copy(obj);
|
|
if (unstable_big_idx != UINT32_MAX && unstable_big_idx+1 < obj->write_count)
|
|
{
|
|
// Remove previous stable entry series
|
|
unmark_allocated_block(block_num);
|
|
assert(unstable_big_wr);
|
|
free_object_space(obj->inode, unstable_big_wr->next(this), (heap_write_t*)obj->next());
|
|
auto after_wr = unstable_big_wr->next(this);
|
|
uint32_t to_copy = inf.used_space - ((uint8_t*)obj + obj->size - (uint8_t*)inf.data);
|
|
uint32_t to_erase = (uint8_t*)obj + obj->size - (uint8_t*)after_wr;
|
|
memmove((void*)after_wr, obj->next(), to_copy);
|
|
memset(inf.data+inf.used_space-to_erase, 0, to_erase);
|
|
obj->size -= to_erase;
|
|
obj->write_count = unstable_big_idx+1;
|
|
inf.used_space -= to_erase;
|
|
reindex_block(block_num, obj->next());
|
|
mark_allocated_block(block_num);
|
|
}
|
|
// Set the stability flag
|
|
uint64_t to_compact = 0;
|
|
for (wr = obj->get_writes(), wr_i = 0; wr_i < obj->write_count; wr_i++, wr = wr->next(this))
|
|
{
|
|
if (!(wr->flags & BS_HEAP_STABLE) && wr->version <= version)
|
|
{
|
|
wr->flags |= BS_HEAP_STABLE;
|
|
}
|
|
if (wr->needs_compact(0))
|
|
{
|
|
to_compact = wr->lsn;
|
|
}
|
|
}
|
|
if (to_compact && compact_queue_lsn.find(oid) == compact_queue_lsn.end())
|
|
{
|
|
compact_queue.push_back(oid);
|
|
compact_queue_lsn[oid] = to_compact;
|
|
}
|
|
obj->crc32c = obj->calc_crc32c();
|
|
return 0;
|
|
}
|
|
|
|
int blockstore_heap_t::post_rollback(object_id oid, uint64_t version, uint32_t *modified_block)
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (!obj)
|
|
{
|
|
// No such object
|
|
return ENOENT;
|
|
}
|
|
auto & inf = block_info.at(block_num);
|
|
assert(inf.data);
|
|
if (inf.virtual_free_space)
|
|
{
|
|
compact_block(block_num, {});
|
|
obj = read_entry(oid, &block_num);
|
|
assert(obj);
|
|
}
|
|
assert(obj->write_count > 0);
|
|
uint32_t wr_i;
|
|
heap_write_t *wr = obj->get_writes();
|
|
if (wr->version < version)
|
|
{
|
|
// No such version
|
|
return ENOENT;
|
|
}
|
|
if (wr->version == version && (wr->flags & BS_HEAP_STABLE))
|
|
{
|
|
// Already rolled back
|
|
return 0;
|
|
}
|
|
for (wr_i = 0; wr_i < obj->write_count && wr->version > version; wr_i++, wr = wr->next(this))
|
|
{
|
|
if (wr->flags & BS_HEAP_STABLE)
|
|
{
|
|
// Already committed, can't rollback
|
|
return EBUSY;
|
|
}
|
|
}
|
|
if (modified_block)
|
|
{
|
|
*modified_block = block_num;
|
|
}
|
|
mvcc_save_copy(obj);
|
|
if (wr_i >= obj->write_count)
|
|
{
|
|
erase_object(block_num, obj);
|
|
}
|
|
else
|
|
{
|
|
unmark_allocated_block(block_num);
|
|
// Erase head versions
|
|
heap_write_t *first_wr = obj->get_writes();
|
|
free_object_space(obj->inode, first_wr, wr);
|
|
uint32_t to_copy = inf.used_space - ((uint8_t*)wr - (uint8_t*)inf.data);
|
|
uint32_t to_erase = (uint8_t*)wr - (uint8_t*)first_wr;
|
|
memmove((void*)first_wr, wr, to_copy);
|
|
memset(inf.data+inf.used_space-to_erase, 0, to_erase);
|
|
obj->size -= to_erase;
|
|
obj->write_count -= wr_i;
|
|
obj->crc32c = obj->calc_crc32c();
|
|
inf.used_space -= to_erase;
|
|
mark_allocated_block(block_num);
|
|
reindex_block(block_num, obj->next());
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int blockstore_heap_t::post_delete(object_id oid, uint32_t *modified_block)
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (!obj)
|
|
{
|
|
// No such object
|
|
return ENOENT;
|
|
}
|
|
if (modified_block)
|
|
{
|
|
*modified_block = block_num;
|
|
}
|
|
mvcc_save_copy(obj);
|
|
auto & inf = block_info.at(block_num);
|
|
assert(inf.data);
|
|
if (inf.virtual_free_space)
|
|
{
|
|
free_object_space(obj->inode, obj->get_writes(), (heap_write_t*)obj->next());
|
|
compact_block(block_num, oid);
|
|
erase_block_index(oid.inode, oid.stripe);
|
|
}
|
|
else
|
|
{
|
|
erase_object(block_num, obj);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int blockstore_heap_t::get_next_compact(object_id & oid)
|
|
{
|
|
auto begin_it = compact_queue.begin(), compact_it = begin_it;
|
|
for (; compact_it != compact_queue.end(); compact_it++)
|
|
{
|
|
auto lsn_it = compact_queue_lsn.find(*compact_it);
|
|
if (lsn_it != compact_queue_lsn.end())
|
|
{
|
|
oid = *compact_it;
|
|
compact_queue.erase(begin_it, compact_it+1);
|
|
compact_queue_lsn.erase(lsn_it);
|
|
return 0;
|
|
}
|
|
}
|
|
compact_queue.clear();
|
|
return ENOENT;
|
|
}
|
|
|
|
// FIXME try to use virtual_free_space when possible
|
|
int blockstore_heap_t::compact_object(object_id oid, uint64_t compact_lsn, uint8_t *new_csums)
|
|
{
|
|
uint32_t block_num = 0;
|
|
heap_object_t *obj = read_entry(oid, &block_num);
|
|
if (!obj)
|
|
{
|
|
// No such object
|
|
return ENOENT;
|
|
}
|
|
mvcc_save_copy(obj);
|
|
auto & inf = block_info.at(block_num);
|
|
uint32_t old_size = obj->size;
|
|
int res = EAGAIN;
|
|
if (compact_object_to(obj, compact_lsn, obj, new_csums))
|
|
{
|
|
unmark_allocated_block(block_num);
|
|
uint32_t new_size = obj->size;
|
|
uint32_t to_copy = inf.used_space - ((uint8_t*)obj + old_size - (uint8_t*)inf.data);
|
|
memmove((uint8_t*)obj + new_size, (uint8_t*)obj + old_size, to_copy);
|
|
memset(inf.data+inf.used_space-(old_size-new_size), 0, old_size-new_size);
|
|
res = 0;
|
|
inf.used_space -= old_size-new_size;
|
|
reindex_block(block_num, obj);
|
|
mark_allocated_block(block_num);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
void blockstore_heap_t::free_object_space(inode_t inode, heap_write_t *from, heap_write_t *to, int mode)
|
|
{
|
|
for (heap_write_t *wr = from; wr < to; wr = wr->next(this))
|
|
{
|
|
if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_BIG_WRITE)
|
|
{
|
|
auto ref_it = mvcc_data_refs.find(wr->location);
|
|
if (ref_it != mvcc_data_refs.end())
|
|
{
|
|
assert(ref_it->second > 0);
|
|
ref_it->second--;
|
|
if (!ref_it->second)
|
|
{
|
|
mvcc_data_refs.erase(ref_it);
|
|
ref_it = mvcc_data_refs.end();
|
|
}
|
|
}
|
|
if (ref_it == mvcc_data_refs.end() && mode != BS_HEAP_FREE_MAIN)
|
|
{
|
|
assert(data_alloc->get(wr->location >> dsk->block_order));
|
|
data_alloc->set(wr->location >> dsk->block_order, false);
|
|
auto & space = inode_space_stats[inode];
|
|
assert(space >= dsk->data_block_size);
|
|
space -= dsk->data_block_size;
|
|
data_used_space -= dsk->data_block_size;
|
|
if (!space)
|
|
inode_space_stats.erase(inode);
|
|
}
|
|
if (mode == BS_HEAP_FREE_MVCC && (wr->flags & BS_HEAP_STABLE))
|
|
{
|
|
// Stop at the last visible version
|
|
break;
|
|
}
|
|
}
|
|
else if ((wr->flags & BS_HEAP_TYPE) == BS_HEAP_SMALL_WRITE)
|
|
{
|
|
auto ref_it = mvcc_buffer_refs.find(wr->location);
|
|
if (ref_it != mvcc_buffer_refs.end())
|
|
{
|
|
assert(ref_it->second > 0);
|
|
ref_it->second--;
|
|
if (!ref_it->second)
|
|
{
|
|
mvcc_buffer_refs.erase(ref_it);
|
|
ref_it = mvcc_buffer_refs.end();
|
|
}
|
|
}
|
|
if (ref_it == mvcc_buffer_refs.end() && mode != BS_HEAP_FREE_MAIN)
|
|
{
|
|
free_buffer_area(inode, wr->location, wr->len);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void blockstore_heap_t::reindex_block(uint32_t block_num, heap_object_t *from_obj)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
for (heap_object_t *obj = from_obj; obj < (heap_object_t*)(inf.data + inf.used_space); obj = obj->next())
|
|
{
|
|
assert(obj->size > 0);
|
|
block_index[get_pg_id(obj->inode, obj->stripe)][obj->inode][obj->stripe] = (uint32_t)block_num*dsk->meta_block_size + ((uint8_t*)obj - inf.data);
|
|
}
|
|
}
|
|
|
|
void blockstore_heap_t::erase_block_index(inode_t inode, uint64_t stripe)
|
|
{
|
|
auto & pg_index = block_index[get_pg_id(inode, stripe)];
|
|
auto & inode_index = pg_index[inode];
|
|
inode_index.erase(stripe);
|
|
if (!inode_index.size())
|
|
{
|
|
pg_index.erase(inode);
|
|
}
|
|
}
|
|
|
|
void blockstore_heap_t::erase_object(uint32_t block_num, heap_object_t *obj)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
unmark_allocated_block(block_num);
|
|
// Erase object
|
|
erase_block_index(obj->inode, obj->stripe);
|
|
free_object_space(obj->inode, obj->get_writes(), (heap_write_t*)((uint8_t*)obj + obj->size));
|
|
uint32_t to_copy = inf.used_space - ((uint8_t*)obj + obj->size - (uint8_t*)inf.data);
|
|
uint32_t to_erase = obj->size;
|
|
memmove(obj, (uint8_t*)obj + to_erase, to_copy);
|
|
memset(inf.data+inf.used_space-to_erase, 0, to_erase);
|
|
inf.used_space -= to_erase;
|
|
mark_allocated_block(block_num);
|
|
reindex_block(block_num, obj);
|
|
}
|
|
|
|
void blockstore_heap_t::unmark_allocated_block(uint32_t block_num)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
meta_used_space -= inf.used_space-inf.virtual_free_space;
|
|
if (inf.used_space-inf.virtual_free_space > dsk->meta_block_size-target_block_free_space)
|
|
{
|
|
meta_alloc_count--;
|
|
meta_alloc->set(block_num, false);
|
|
used_alloc_queue.erase((heap_block_free_t){
|
|
.block_num = block_num,
|
|
.free_space = (uint32_t)(dsk->meta_block_size-inf.used_space+inf.virtual_free_space),
|
|
});
|
|
}
|
|
}
|
|
|
|
void blockstore_heap_t::mark_allocated_block(uint32_t block_num)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
meta_used_space += inf.used_space-inf.virtual_free_space;
|
|
if (inf.used_space-inf.virtual_free_space > dsk->meta_block_size-target_block_free_space)
|
|
{
|
|
meta_alloc_count++;
|
|
meta_alloc->set(block_num, true);
|
|
used_alloc_queue.insert((heap_block_free_t){
|
|
.block_num = block_num,
|
|
.free_space = (uint32_t)(dsk->meta_block_size-inf.used_space+inf.virtual_free_space),
|
|
});
|
|
}
|
|
}
|
|
|
|
int blockstore_heap_t::list_objects(uint32_t pg_num, uint64_t min_inode, uint64_t max_inode,
|
|
obj_ver_id **result_list, size_t *stable_count, size_t *unstable_count)
|
|
{
|
|
obj_ver_id *res = NULL;
|
|
size_t res_size = 0, res_alloc = 0;
|
|
obj_ver_id *unstable = NULL;
|
|
size_t unstable_size = 0, unstable_alloc = 0;
|
|
uint64_t pool_id = (min_inode >> (64-POOL_ID_BITS));
|
|
if (pool_id == 0 || pool_id != (max_inode >> (64-POOL_ID_BITS)))
|
|
{
|
|
return EINVAL;
|
|
}
|
|
auto sh_it = pool_shard_settings.find(pool_id);
|
|
uint32_t pg_count = (sh_it != pool_shard_settings.end() ? sh_it->second.pg_count : 0);
|
|
if (pg_num == 0 || pg_num > (pg_count == 0 ? 1 : pg_count))
|
|
{
|
|
return EINVAL;
|
|
}
|
|
uint64_t pool_pg_id = (pool_id << (64-POOL_ID_BITS)) | (pg_count == 0 ? 0 : pg_num);
|
|
auto first_it = block_index[pool_pg_id].lower_bound(min_inode);
|
|
auto last_it = block_index[pool_pg_id].upper_bound(max_inode);
|
|
for (auto inode_it = first_it; inode_it != last_it; inode_it++)
|
|
{
|
|
for (auto & stripe_pair: inode_it->second)
|
|
{
|
|
auto oid = (object_id){ .inode = inode_it->first, .stripe = stripe_pair.first };
|
|
const uint64_t block_pos = stripe_pair.second;
|
|
const uint32_t block_num = block_pos / dsk->meta_block_size;
|
|
heap_object_t *obj = (heap_object_t*)(block_info[block_num].data + (block_pos % dsk->meta_block_size));
|
|
assert(obj->inode == oid.inode && obj->stripe == oid.stripe);
|
|
heap_write_t *first_wr = obj->get_writes();
|
|
heap_write_t *last_wr = (heap_write_t*)((uint8_t*)obj + obj->size);
|
|
uint64_t stable_version = 0;
|
|
for (heap_write_t *wr = first_wr; wr < last_wr; wr = wr->next(this))
|
|
{
|
|
if (wr->flags & BS_HEAP_STABLE)
|
|
{
|
|
stable_version = wr->version;
|
|
break;
|
|
}
|
|
}
|
|
if (!(first_wr->flags & BS_HEAP_STABLE))
|
|
{
|
|
if (unstable_size >= unstable_alloc)
|
|
{
|
|
unstable_alloc = (!unstable_alloc ? 128 : unstable_alloc*2);
|
|
unstable = (obj_ver_id*)realloc_or_die(unstable, sizeof(obj_ver_id) * unstable_alloc);
|
|
}
|
|
unstable[unstable_size++] = (obj_ver_id){ .oid = oid, .version = stable_version };
|
|
}
|
|
if (stable_version)
|
|
{
|
|
if (res_size >= res_alloc)
|
|
{
|
|
res_alloc = (!res_alloc ? 128 : res_alloc*2);
|
|
res = (obj_ver_id*)realloc_or_die(res, sizeof(obj_ver_id) * res_alloc);
|
|
}
|
|
res[res_size++] = (obj_ver_id){ .oid = oid, .version = stable_version };
|
|
}
|
|
}
|
|
}
|
|
if (unstable_size)
|
|
{
|
|
if (res_size+unstable_size > res_alloc)
|
|
{
|
|
res_alloc = res_size+unstable_size;
|
|
res = (obj_ver_id*)realloc_or_die(res, sizeof(obj_ver_id) * res_alloc);
|
|
}
|
|
memcpy(res + res_size, unstable, sizeof(obj_ver_id) * unstable_size);
|
|
free(unstable);
|
|
unstable = NULL;
|
|
}
|
|
*result_list = res;
|
|
*stable_count = res_size;
|
|
*unstable_count = unstable_size;
|
|
return 0;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::find_free_data()
|
|
{
|
|
uint64_t loc = data_alloc->find_free();
|
|
if (loc != UINT64_MAX)
|
|
{
|
|
loc = loc << dsk->block_order;
|
|
}
|
|
return loc;
|
|
}
|
|
|
|
bool blockstore_heap_t::is_data_used(uint64_t location)
|
|
{
|
|
return data_alloc->get(location >> dsk->block_order);
|
|
}
|
|
|
|
void blockstore_heap_t::use_data(inode_t inode, uint64_t location)
|
|
{
|
|
assert(!data_alloc->get(location >> dsk->block_order));
|
|
data_alloc->set(location >> dsk->block_order, true);
|
|
inode_space_stats[inode] += dsk->data_block_size;
|
|
data_used_space += dsk->data_block_size;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::find_free_buffer_area(uint64_t size)
|
|
{
|
|
auto free_it = buffer_by_size.lower_bound((heap_extent_t){ .start = 0, .end = size });
|
|
if (free_it == buffer_by_size.end())
|
|
{
|
|
return UINT64_MAX;
|
|
}
|
|
return free_it->start;
|
|
}
|
|
|
|
bool blockstore_heap_t::is_buffer_area_free(uint64_t location, uint64_t size)
|
|
{
|
|
auto free_it = buffer_by_end.lower_bound((heap_extent_t){ .end = location+size });
|
|
return (free_it != buffer_by_end.end() && free_it->start <= location);
|
|
}
|
|
|
|
void blockstore_heap_t::use_buffer_area(inode_t inode, uint64_t location, uint64_t size)
|
|
{
|
|
auto free_it = buffer_by_end.lower_bound((heap_extent_t){ .end = location+size });
|
|
assert(free_it != buffer_by_end.end() && free_it->start <= location && free_it->end >= location+size);
|
|
heap_extent_t extent = *free_it;
|
|
buffer_by_end.erase(free_it);
|
|
buffer_by_size.erase(extent);
|
|
if (extent.start == location)
|
|
{
|
|
extent.start += size;
|
|
buffer_by_end.insert(extent);
|
|
buffer_by_size.insert(extent);
|
|
}
|
|
else if (extent.end == location+size)
|
|
{
|
|
extent.end -= size;
|
|
buffer_by_end.insert(extent);
|
|
buffer_by_size.insert(extent);
|
|
}
|
|
else
|
|
{
|
|
buffer_by_end.insert((heap_extent_t){ .start = extent.start, .end = location });
|
|
buffer_by_size.insert((heap_extent_t){ .start = extent.start, .end = location });
|
|
buffer_by_end.insert((heap_extent_t){ .start = location+size, .end = extent.end });
|
|
buffer_by_size.insert((heap_extent_t){ .start = location+size, .end = extent.end });
|
|
}
|
|
buffer_area_used_space += size;
|
|
}
|
|
|
|
void blockstore_heap_t::free_buffer_area(inode_t inode, uint64_t location, uint64_t size)
|
|
{
|
|
auto next_it = buffer_by_end.lower_bound((heap_extent_t){ .end = location+size });
|
|
auto prev_it = next_it == buffer_by_end.begin() ? buffer_by_end.end() : std::prev(next_it);
|
|
assert(next_it == buffer_by_end.end() || next_it->start >= location+size);
|
|
assert(prev_it == buffer_by_end.end() || prev_it->end <= location);
|
|
bool merge_prev = (prev_it != buffer_by_end.end() && prev_it->end == location);
|
|
bool merge_next = (next_it != buffer_by_end.end() && next_it->start == location+size);
|
|
uint64_t prev_start = merge_prev ? prev_it->start : 0;
|
|
uint64_t next_end = merge_next ? next_it->end : 0;
|
|
if (merge_prev && merge_next)
|
|
{
|
|
buffer_by_size.erase(*prev_it);
|
|
buffer_by_size.erase(*next_it);
|
|
buffer_by_end.erase(prev_it);
|
|
buffer_by_end.erase(next_it);
|
|
buffer_by_end.insert((heap_extent_t){ .start = prev_start, .end = next_end });
|
|
buffer_by_size.insert((heap_extent_t){ .start = prev_start, .end = next_end });
|
|
}
|
|
else if (merge_prev)
|
|
{
|
|
buffer_by_size.erase(*prev_it);
|
|
buffer_by_end.erase(prev_it);
|
|
buffer_by_end.insert((heap_extent_t){ .start = prev_start, .end = location+size });
|
|
buffer_by_size.insert((heap_extent_t){ .start = prev_start, .end = location+size });
|
|
}
|
|
else if (merge_next)
|
|
{
|
|
buffer_by_size.erase(*next_it);
|
|
buffer_by_end.erase(next_it);
|
|
buffer_by_end.insert((heap_extent_t){ .start = location, .end = next_end });
|
|
buffer_by_size.insert((heap_extent_t){ .start = location, .end = next_end });
|
|
}
|
|
else
|
|
{
|
|
buffer_by_end.insert((heap_extent_t){ .start = location, .end = location+size });
|
|
buffer_by_size.insert((heap_extent_t){ .start = location, .end = location+size });
|
|
}
|
|
buffer_area_used_space -= size;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::get_buffer_area_used_space()
|
|
{
|
|
return buffer_area_used_space;
|
|
}
|
|
|
|
uint8_t *blockstore_heap_t::get_meta_block(uint32_t block_num)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
return inf.data;
|
|
}
|
|
|
|
uint32_t blockstore_heap_t::get_meta_block_used_space(uint32_t block_num)
|
|
{
|
|
auto & inf = block_info.at(block_num);
|
|
return inf.used_space-inf.virtual_free_space;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::get_data_used_space()
|
|
{
|
|
return data_used_space;
|
|
}
|
|
|
|
const std::map<uint64_t, uint64_t> & blockstore_heap_t::get_inode_space_stats()
|
|
{
|
|
return inode_space_stats;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::get_meta_total_space()
|
|
{
|
|
return (uint64_t)meta_block_count*dsk->meta_block_size;
|
|
}
|
|
|
|
uint64_t blockstore_heap_t::get_meta_used_space()
|
|
{
|
|
return meta_used_space;
|
|
}
|
|
|
|
uint32_t blockstore_heap_t::get_meta_nearfull_blocks()
|
|
{
|
|
return meta_alloc_count;
|
|
}
|
|
|
|
uint32_t blockstore_heap_t::get_compact_queue_size()
|
|
{
|
|
return compact_queue.size();
|
|
}
|
|
|
|
uint32_t blockstore_heap_t::get_max_write_entry_size()
|
|
{
|
|
return max_write_entry_size;
|
|
}
|
|
|
|
void blockstore_heap_t::set_fail_on_warn(bool fail)
|
|
{
|
|
fail_on_warn = fail;
|
|
}
|