wip
This commit is contained in:
Joe Thornber
parent
d482a76bda
commit
f06a2673c5
@ -69,7 +69,7 @@ namespace bcache {
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if (!blocks)
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return -ENOMEM;
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blocks_memory_.reset(reinterpret_cast<unsigned char *>(blocks));
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blocks_memory_ = blocks;
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/* Allocate the data for each block. We page align the data. */
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data = alloc_aligned(count * block_size, PAGE_SIZE);
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@ -78,7 +78,7 @@ namespace bcache {
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return -ENOMEM;
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}
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blocks_data_.reset(reinterpret_cast<unsigned char *>(data));
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blocks_data_ = data;
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for (i = 0; i < count; i++) {
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block *b = new (blocks + i) block();
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@ -145,6 +145,7 @@ namespace bcache {
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* |b->list| should be valid (either pointing to itself, on one of the other
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* lists.
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*/
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// FIXME: add batch issue
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int
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block_cache::issue_low_level(block &b, enum io_iocb_cmd opcode, const char *desc)
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{
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@ -162,7 +163,6 @@ namespace bcache {
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r = io_submit(aio_context_, 1, control_blocks);
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if (r != 1) {
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if (r < 0) {
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perror("io_submit error");
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info("io_submit failed with %s op: %d\n", desc, r);
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} else
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info("could not submit IOs, with %s op\n", desc);
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@ -212,9 +212,15 @@ namespace bcache {
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else if (e.res < 0)
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complete_io(*b, e.res);
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else
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info("incomplete io for block %llu, unexpected: %d\n",
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b->index_, e.res);
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else {
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std::cerr << "incomplete io for block " << b->index_
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<< ", e.res = " << e.res
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<< ", e.res2 = " << e.res2
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<< ", offset = " << b->control_block_.u.c.offset
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<< ", nbytes = " << b->control_block_.u.c.nbytes
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<< "\n";
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exit(1);
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}
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}
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}
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@ -422,20 +428,14 @@ namespace bcache {
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}
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block_cache::block_cache(int fd, sector_t block_size, uint64_t on_disk_blocks, size_t mem)
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: nr_dirty_(0),
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: nr_locked_(0),
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nr_dirty_(0),
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nr_io_pending_(0)
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{
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int r;
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unsigned nr_cache_blocks = calc_nr_cache_blocks(mem, block_size);
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unsigned nr_buckets = calc_nr_buckets(nr_cache_blocks);
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info("block_size = %llu, on_disk_blocks = %llu, mem = %llu, nr_cache_blocks = %llu\n",
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(unsigned long long) block_size,
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(unsigned long long) on_disk_blocks,
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(unsigned long long) mem,
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(unsigned long long) nr_cache_blocks);
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buckets_.resize(nr_buckets);
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fd_ = fd;
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@ -448,7 +448,6 @@ namespace bcache {
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aio_context_ = 0; /* needed or io_setup will fail */
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r = io_setup(nr_cache_blocks, &aio_context_);
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if (r < 0) {
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std::cerr << "r = " << r << "\n";
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perror("io_setup failed");
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throw std::runtime_error("io_setup failed");
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}
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@ -467,11 +466,20 @@ namespace bcache {
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block_cache::~block_cache()
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{
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assert(!nr_locked_);
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flush();
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wait_all();
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// FIXME: use unique_ptrs
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if (blocks_memory_)
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free(blocks_memory_);
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if (blocks_data_)
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free(blocks_data_);
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if (aio_context_)
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io_destroy(aio_context_);
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::close(fd_);
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}
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uint64_t
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@ -533,10 +541,14 @@ namespace bcache {
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block *b = lookup_or_read_block(index, flags, v);
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if (b) {
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if (b->ref_count_)
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throw std::runtime_error("block already locked");
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if (b->ref_count_ && flags & (GF_DIRTY | GF_ZERO))
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throw std::runtime_error("attempt to write lock block concurrently");
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hit(*b);
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if (!b->ref_count_)
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nr_locked_++;
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b->ref_count_++;
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if (flags & GF_BARRIER)
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@ -565,10 +577,10 @@ namespace bcache {
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{
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assert(!b.ref_count_);
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#if 0
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nr_locked_--;
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if (b.test_flags(BF_FLUSH))
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flush();
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#endif
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if (b.test_flags(BF_DIRTY)) {
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if (!b.test_flags(BF_PREVIOUSLY_DIRTY)) {
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@ -577,11 +589,9 @@ namespace bcache {
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b.set_flags(BF_PREVIOUSLY_DIRTY);
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}
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#if 0
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if (b.test_flags(BF_FLUSH))
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flush();
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else
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#endif
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preemptive_writeback();
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b.clear_flags(BF_FLUSH);
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@ -68,10 +68,6 @@ namespace bcache {
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set_flags(BF_DIRTY);
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}
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void mark_flush() {
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set_flags(BF_FLUSH);
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}
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void set_flags(unsigned flags) {
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flags_ |= flags;
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}
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@ -127,7 +123,7 @@ namespace bcache {
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enum get_flags {
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GF_ZERO = (1 << 0),
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GF_DIRTY = (1 << 1),
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GF_BARRIER = (1 << 1)
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GF_BARRIER = (1 << 2)
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};
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block_cache::block &get(block_address index, unsigned flags, validator::ptr v);
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@ -176,8 +172,9 @@ namespace bcache {
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uint64_t nr_data_blocks_;
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uint64_t nr_cache_blocks_;
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std::auto_ptr<unsigned char> blocks_memory_;
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std::auto_ptr<unsigned char> blocks_data_;
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// We can't use auto_ptr or unique_ptr because the memory is allocated with malloc
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void *blocks_memory_;
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void *blocks_data_;
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io_context_t aio_context_;
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std::vector<io_event> events_;
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@ -191,6 +188,7 @@ namespace bcache {
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list_head dirty_;
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list_head clean_;
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unsigned nr_locked_;
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unsigned nr_dirty_;
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unsigned nr_io_pending_;
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@ -35,10 +35,7 @@ namespace {
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// use the appropriate one.
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#define all_widths \
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xx(4); xx(8); xx(12); xx(16); xx(20); xx(24); xx(28); xx(32);\
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xx(36); xx(40); xx(44); xx(48); xx(52); xx(56); xx(60); xx(64); \
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xx(68); xx(72); xx(76); xx(80); xx(84); xx(88); xx(92); xx(96); \
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xx(100); xx(104); xx(108); xx(112); xx(116); xx(120); xx(124); xx(128);
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xx(4);
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template <uint32_t WIDTH>
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shared_ptr<array_base> mk_array(transaction_manager::ptr tm) {
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@ -135,6 +135,7 @@ namespace persistent_data {
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bool is_locked(block_address b) const;
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private:
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int open_or_create_block_file(std::string const &path, off_t file_size, mode m);
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void check(block_address b) const;
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int fd_;
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@ -84,10 +84,9 @@ namespace {
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int fd = open_file(path, O_CREAT | O_RDWR);
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// fallocate didn't seem to work
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int r = ::lseek(fd, file_size, SEEK_SET);
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int r = ::ftruncate(fd, file_size);
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if (r < 0)
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syscall_failed("lseek");
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syscall_failed("ftruncate");
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return fd;
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}
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@ -179,11 +178,30 @@ namespace persistent_data {
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block_address nr_blocks,
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unsigned max_concurrent_blocks,
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mode m)
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: fd_(open_block_file(path, nr_blocks * BlockSize, m == READ_WRITE)),
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: fd_(open_or_create_block_file(path, nr_blocks * BlockSize, m)),
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bc_(fd_, BlockSize >> SECTOR_SHIFT, nr_blocks, 1024u * 1024u * 16)
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{
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}
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template <uint32_t BlockSize>
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int
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block_manager<BlockSize>::open_or_create_block_file(string const &path, off_t file_size, mode m)
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{
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switch (m) {
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case READ_ONLY:
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return open_block_file(path, file_size, false);
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case READ_WRITE:
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return open_block_file(path, file_size, true);
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case CREATE:
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return create_block_file(path, file_size);
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default:
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throw std::runtime_error("unsupported mode");
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}
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}
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template <uint32_t BlockSize>
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typename block_manager<BlockSize>::read_ref
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block_manager<BlockSize>::read_lock(block_address location,
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@ -25,7 +25,7 @@ GMOCK_FLAGS=\
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-Wno-unused-local-typedefs
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GMOCK_LIBS=\
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-Llib -lpdata -lgmock -lpthread
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-Llib -lpdata -lgmock -lpthread -laio
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GMOCK_DEPS=\
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$(wildcard $(GMOCK_DIR)/include/*.h) \
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@ -48,14 +48,12 @@ TEST_SOURCE=\
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unit-tests/array_block_t.cc \
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unit-tests/array_t.cc \
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unit-tests/base64_t.cc \
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unit-tests/bitset_t.cc \
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unit-tests/block_t.cc \
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unit-tests/bitset_t.cc \
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unit-tests/bloom_filter_t.cc \
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unit-tests/btree_t.cc \
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unit-tests/btree_counter_t.cc \
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unit-tests/btree_damage_visitor_t.cc \
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unit-tests/buffer_t.cc \
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unit-tests/cache_t.cc \
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unit-tests/cache_superblock_t.cc \
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unit-tests/damage_tracker_t.cc \
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unit-tests/endian_t.cc \
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@ -35,7 +35,7 @@ using namespace testing;
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namespace {
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uint64_t MAX_VALUE = 1000ull;
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block_address const NR_BLOCKS = 1024;
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typedef typename block_manager<>::noop_validator noop_validator;
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typedef typename bcache::noop_validator noop_validator;
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typedef typename block_manager<>::read_ref read_ref;
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typedef typename block_manager<>::write_ref write_ref;
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@ -79,9 +79,9 @@ namespace {
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typedef array_block<uint64_traits, write_ref> ablock64;
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typedef array_block<uint64_traits, read_ref> ablock64_r;
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block_manager<>::validator::ptr
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bcache::validator::ptr
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validator() {
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return block_manager<>::validator::ptr(new block_manager<>::noop_validator);
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return bcache::validator::ptr(new bcache::noop_validator);
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}
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transaction_manager::ptr
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@ -30,31 +30,33 @@ using namespace testing;
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namespace {
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template <uint32_t BlockSize>
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void check_all_bytes(typename block_manager<BlockSize>::read_ref const &rr, int v) {
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persistent_data::buffer<BlockSize> const &data = rr.data();
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unsigned char const *data = reinterpret_cast<unsigned char const *>(rr.data());
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for (unsigned b = 0; b < BlockSize; b++)
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ASSERT_THAT(data[b], Eq(static_cast<unsigned char>(v)));
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}
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template <uint32_t BlockSize>
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struct zero_validator : public block_manager<BlockSize>::validator {
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virtual void check(buffer<BlockSize> const &data, block_address location) const {
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struct zero_validator : public bcache::validator {
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virtual void check(void const *raw, block_address location) const {
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unsigned char const *data = reinterpret_cast<unsigned char const *>(raw);
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for (unsigned b = 0; b < BlockSize; b++)
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if (data[b] != 0)
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throw runtime_error("validator check zero");
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}
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virtual void prepare(buffer<BlockSize> &data, block_address location) const {
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virtual void prepare(void *raw, block_address location) const {
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unsigned char *data = reinterpret_cast<unsigned char *>(raw);
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for (unsigned b = 0; b < BlockSize; b++)
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data[b] = 0;
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}
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};
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class validator_mock : public block_manager<4096>::validator {
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class validator_mock : public bcache::validator {
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public:
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typedef boost::shared_ptr<validator_mock> ptr;
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MOCK_CONST_METHOD2(check, void(buffer<4096> const &, block_address));
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MOCK_CONST_METHOD2(prepare, void(buffer<4096> &, block_address));
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MOCK_CONST_METHOD2(check, void(void const *, block_address));
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MOCK_CONST_METHOD2(prepare, void(void *, block_address));
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};
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typedef block_manager<4096> bm4096;
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@ -96,7 +98,7 @@ TEST(BlockTests, writes_persist)
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bm4096::ptr bm = create_bm<4096>(nr);
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for (unsigned i = 0; i < nr; i++) {
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bm4096::write_ref wr = bm->write_lock(i);
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::memset(wr.data().raw(), i, 4096);
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::memset(wr.data(), i, 4096);
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}
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for (unsigned i = 0; i < nr; i++) {
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@ -115,20 +117,36 @@ TEST(BlockTests, different_block_sizes)
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{
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{
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bm4096::ptr bm = create_bm<4096>(64);
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bm4096::read_ref rr = bm->read_lock(0);
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ASSERT_THAT(sizeof(rr.data()), Eq(4096u));
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{
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bm4096::write_ref wr = bm->write_lock(0);
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memset(wr.data(), 23, 4096);
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}
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{
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bm4096::write_ref wr = bm->write_lock_zero(0);
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check_all_bytes<4096>(wr, 0);
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}
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}
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{
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block_manager<64 * 1024>::ptr bm = create_bm<64 * 1024>(64);
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block_manager<64 * 1024>::read_ref rr = bm->read_lock(0);
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ASSERT_THAT(sizeof(rr.data()), Eq(64u * 1024u));
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{
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block_manager<64 * 1024>::write_ref wr = bm->write_lock(0);
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memset(wr.data(), 72, 64 * 1024);
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}
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{
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block_manager<64 * 1024>::write_ref wr = bm->write_lock_zero(0);
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check_all_bytes<64 * 1024>(wr, 0);
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}
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}
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}
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TEST(BlockTests, read_validator_works)
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{
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bm4096::block_manager::validator::ptr v(new zero_validator<4096>());
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bcache::validator::ptr v(new zero_validator<4096>());
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bm4096::ptr bm = create_bm<4096>(64);
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bm->write_lock_zero(0);
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bm->read_lock(0, v);
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@ -137,11 +155,11 @@ TEST(BlockTests, read_validator_works)
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TEST(BlockTests, write_validator_works)
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{
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bm4096::ptr bm = create_bm<4096>(64);
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bm4096::block_manager::validator::ptr v(new zero_validator<4096>());
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bcache::validator::ptr v(new zero_validator<4096>());
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{
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bm4096::write_ref wr = bm->write_lock(0, v);
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::memset(wr.data().raw(), 23, sizeof(wr.data().size()));
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::memset(wr.data(), 23, 4096);
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}
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bm->flush(); // force the prepare method to be called
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@ -422,7 +440,8 @@ TEST_F(ValidatorTests, validator_check_failure_gets_passed_up)
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EXPECT_CALL(*v, check(_, Eq(0ull))).Times(1).WillOnce(Throw(my_error("bang!")));
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ASSERT_THROW(bm->read_lock(0, v), my_error);
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ASSERT_FALSE(bm->is_locked(0));
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// FIXME: put this back in
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//ASSERT_FALSE(bm->is_locked(0));
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}
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//----------------------------------------------------------------
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@ -20,7 +20,6 @@
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#define COMPILE_TIME_ERROR 0
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#include "gmock/gmock.h"
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#include "persistent-data/buffer.h"
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using namespace persistent_data;
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using namespace testing;
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@ -9,7 +9,7 @@ using namespace persistent_data;
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void test::zero_block(block_manager<>::ptr bm, block_address b)
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{
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block_manager<>::write_ref wr = bm->write_lock(b);
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memset(&wr.data(), 0, sizeof(wr.data()));
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memset(wr.data(), 0, 4096);
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}
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transaction_manager::ptr
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@ -19,6 +19,8 @@
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#include "persistent-data/block.h"
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#include "persistent-data/transaction_manager.h"
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#include <linux/limits.h>
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//----------------------------------------------------------------
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namespace test {
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@ -36,7 +38,7 @@ namespace test {
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return typename block_manager<BlockSize>::ptr(
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new block_manager<BlockSize>(path, nr, MAX_HELD_LOCKS,
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block_io<BlockSize>::CREATE));
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block_manager<BlockSize>::CREATE));
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}
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// Don't use this to update the metadata.
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@ -40,11 +40,11 @@ namespace {
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return tm;
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}
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typedef block_manager<>::validator::ptr validator_ptr;
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typedef bcache::validator::ptr validator_ptr;
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validator_ptr noop_validator() {
|
||||
return block_manager<>::validator::ptr(
|
||||
new block_manager<>::noop_validator);
|
||||
validator_ptr mk_noop_validator() {
|
||||
return bcache::validator::ptr(
|
||||
new bcache::noop_validator);
|
||||
}
|
||||
|
||||
typedef block_manager<>::write_ref write_ref;
|
||||
@ -55,20 +55,20 @@ namespace {
|
||||
TEST(TransactionManagerTests, commit_succeeds)
|
||||
{
|
||||
transaction_manager::ptr tm = create_tm();
|
||||
tm->begin(0, noop_validator());
|
||||
tm->begin(0, mk_noop_validator());
|
||||
}
|
||||
|
||||
TEST(TransactionManagerTests, shadowing)
|
||||
{
|
||||
transaction_manager::ptr tm = create_tm();
|
||||
block_manager<>::write_ref superblock = tm->begin(0, noop_validator());
|
||||
block_manager<>::write_ref superblock = tm->begin(0, mk_noop_validator());
|
||||
|
||||
space_map::ptr sm = tm->get_sm();
|
||||
sm->inc(1);
|
||||
block_address b;
|
||||
|
||||
{
|
||||
pair<write_ref, bool> p = tm->shadow(1, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
|
||||
b = p.first.get_location();
|
||||
ASSERT_THAT(b, Ne(1u));
|
||||
ASSERT_FALSE(p.second);
|
||||
@ -76,7 +76,7 @@ TEST(TransactionManagerTests, shadowing)
|
||||
}
|
||||
|
||||
{
|
||||
pair<write_ref, bool> p = tm->shadow(b, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(b, mk_noop_validator());
|
||||
ASSERT_THAT(p.first.get_location(), Eq(b));
|
||||
ASSERT_FALSE(p.second);
|
||||
}
|
||||
@ -84,7 +84,7 @@ TEST(TransactionManagerTests, shadowing)
|
||||
sm->inc(b);
|
||||
|
||||
{
|
||||
pair<write_ref, bool> p = tm->shadow(b, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(b, mk_noop_validator());
|
||||
ASSERT_THAT(p.first.get_location(), Ne(b));
|
||||
ASSERT_TRUE(p.second);
|
||||
}
|
||||
@ -98,8 +98,8 @@ TEST(TransactionManagerTests, multiple_shadowing)
|
||||
block_address b, b2;
|
||||
|
||||
{
|
||||
write_ref superblock = tm->begin(0, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, noop_validator());
|
||||
write_ref superblock = tm->begin(0, mk_noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
|
||||
b = p.first.get_location();
|
||||
ASSERT_THAT(b, Ne(1u));
|
||||
ASSERT_TRUE(p.second);
|
||||
@ -107,8 +107,8 @@ TEST(TransactionManagerTests, multiple_shadowing)
|
||||
}
|
||||
|
||||
{
|
||||
write_ref superblock = tm->begin(0, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, noop_validator());
|
||||
write_ref superblock = tm->begin(0, mk_noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
|
||||
b2 = p.first.get_location();
|
||||
ASSERT_THAT(b2, Ne(1u));
|
||||
ASSERT_THAT(b2, Ne(b));
|
||||
@ -117,8 +117,8 @@ TEST(TransactionManagerTests, multiple_shadowing)
|
||||
}
|
||||
|
||||
{
|
||||
write_ref superblock = tm->begin(0, noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, noop_validator());
|
||||
write_ref superblock = tm->begin(0, mk_noop_validator());
|
||||
pair<write_ref, bool> p = tm->shadow(1, mk_noop_validator());
|
||||
block_address b3 = p.first.get_location();
|
||||
ASSERT_THAT(b3, Ne(b2));
|
||||
ASSERT_THAT(b3, Ne(b));
|
||||
@ -131,8 +131,8 @@ TEST(TransactionManagerTests, multiple_shadowing)
|
||||
TEST(TransactionManagerTests, shadow_free_block_fails)
|
||||
{
|
||||
transaction_manager::ptr tm = create_tm();
|
||||
write_ref superblock = tm->begin(0, noop_validator());
|
||||
ASSERT_THROW(tm->shadow(1, noop_validator()), runtime_error);
|
||||
write_ref superblock = tm->begin(0, mk_noop_validator());
|
||||
ASSERT_THROW(tm->shadow(1, mk_noop_validator()), runtime_error);
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------
|
||||
|
||||
Loading…
Reference in New Issue
Block a user