--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+//
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 XSky <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <chrono>
+#include <functional>
+#include <map>
+#include <thread>
+#include <xmmintrin.h>
+
+#include <spdk/nvme.h>
+
+#include <rte_lcore.h>
+
+#include "include/stringify.h"
+#include "include/types.h"
+#include "include/compat.h"
+#include "common/align.h"
+#include "common/errno.h"
+#include "common/debug.h"
+#include "common/perf_counters.h"
+#include "common/io_priority.h"
+
+#include "NVMEDevice.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_bdev
+#undef dout_prefix
+#define dout_prefix *_dout << "bdev(" << sn << ") "
+
+static constexpr uint16_t data_buffer_default_num = 2048;
+
+static constexpr uint32_t data_buffer_size = 8192;
+
+static constexpr uint16_t inline_segment_num = 32;
+
+static thread_local int queue_id = -1;
+
+enum {
+ l_bluestore_nvmedevice_first = 632430,
+ l_bluestore_nvmedevice_aio_write_lat,
+ l_bluestore_nvmedevice_read_lat,
+ l_bluestore_nvmedevice_flush_lat,
+ l_bluestore_nvmedevice_aio_write_queue_lat,
+ l_bluestore_nvmedevice_read_queue_lat,
+ l_bluestore_nvmedevice_flush_queue_lat,
+ l_bluestore_nvmedevice_queue_ops,
+ l_bluestore_nvmedevice_polling_lat,
+ l_bluestore_nvmedevice_buffer_alloc_failed,
+ l_bluestore_nvmedevice_last
+};
+
+static void io_complete(void *t, const struct spdk_nvme_cpl *completion);
+
+int dpdk_thread_adaptor(void *f)
+{
+ (*static_cast<std::function<void ()>*>(f))();
+ return 0;
+}
+
+struct IOSegment {
+ uint32_t len;
+ void *addr;
+};
+
+struct IORequest {
+ uint16_t cur_seg_idx = 0;
+ uint16_t nseg;
+ uint32_t cur_seg_left = 0;
+ void *inline_segs[inline_segment_num];
+ void **extra_segs = nullptr;
+};
+
+class SharedDriverQueueData {
+ SharedDriverData *driver;
+ spdk_nvme_ctrlr *ctrlr;
+ spdk_nvme_ns *ns;
+ std::string sn;
+ uint64_t block_size;
+ uint32_t sector_size;
+ uint32_t core_id;
+ uint32_t queueid;
+ struct spdk_nvme_qpair *qpair;
+ std::function<void ()> run_func;
+ friend class AioCompletionThread;
+
+ bool aio_stop = false;
+ void _aio_thread();
+ int alloc_buf_from_pool(Task *t, bool write);
+
+ std::atomic_bool queue_empty;
+ Mutex queue_lock;
+ Cond queue_cond;
+ std::queue<Task*> task_queue;
+
+ Mutex flush_lock;
+ Cond flush_cond;
+ std::atomic_int flush_waiters;
+ std::set<uint64_t> flush_waiter_seqs;
+
+ public:
+ std::atomic_ulong completed_op_seq, queue_op_seq;
+ std::vector<void*> data_buf_mempool;
+ PerfCounters *logger = nullptr;
+
+ SharedDriverQueueData(SharedDriverData *driver, spdk_nvme_ctrlr *c, spdk_nvme_ns *ns, uint64_t block_size,
+ const std::string &sn_tag, uint32_t sector_size, uint32_t core, uint32_t queue_id)
+ : driver(driver),
+ ctrlr(c),
+ ns(ns),
+ sn(sn_tag),
+ block_size(block_size),
+ sector_size(sector_size),
+ core_id(core),
+ queueid(queue_id),
+ run_func([this]() { _aio_thread(); }),
+ queue_empty(false),
+ queue_lock("NVMEDevice::queue_lock"),
+ flush_lock("NVMEDevice::flush_lock"),
+ flush_waiters(0),
+ completed_op_seq(0), queue_op_seq(0) {
+
+ qpair = spdk_nvme_ctrlr_alloc_io_qpair(ctrlr, SPDK_NVME_QPRIO_URGENT);
+ PerfCountersBuilder b(g_ceph_context, string("NVMEDevice-AIOThread-"+stringify(this)),
+ l_bluestore_nvmedevice_first, l_bluestore_nvmedevice_last);
+ b.add_time_avg(l_bluestore_nvmedevice_aio_write_lat, "aio_write_lat", "Average write completing latency");
+ b.add_time_avg(l_bluestore_nvmedevice_read_lat, "read_lat", "Average read completing latency");
+ b.add_time_avg(l_bluestore_nvmedevice_flush_lat, "flush_lat", "Average flush completing latency");
+ b.add_u64(l_bluestore_nvmedevice_queue_ops, "queue_ops", "Operations in nvme queue");
+ b.add_time_avg(l_bluestore_nvmedevice_polling_lat, "polling_lat", "Average polling latency");
+ b.add_time_avg(l_bluestore_nvmedevice_aio_write_queue_lat, "aio_write_queue_lat", "Average queue write request latency");
+ b.add_time_avg(l_bluestore_nvmedevice_read_queue_lat, "read_queue_lat", "Average queue read request latency");
+ b.add_time_avg(l_bluestore_nvmedevice_flush_queue_lat, "flush_queue_lat", "Average queue flush request latency");
+ b.add_u64_counter(l_bluestore_nvmedevice_buffer_alloc_failed, "buffer_alloc_failed", "Alloc data buffer failed count");
+ logger = b.create_perf_counters();
+ g_ceph_context->get_perfcounters_collection()->add(logger);
+ }
+
+ void queue_task(Task *t, uint64_t ops = 1) {
+ queue_op_seq += ops;
+ Mutex::Locker l(queue_lock);
+ task_queue.push(t);
+ if (queue_empty.load()) {
+ queue_empty = false;
+ queue_cond.Signal();
+ }
+ }
+
+ void flush_wait() {
+ uint64_t cur_seq = queue_op_seq.load();
+ uint64_t left = cur_seq - completed_op_seq.load();
+ if (cur_seq > completed_op_seq) {
+ // TODO: this may contains read op
+ dout(10) << __func__ << " existed inflight ops " << left << dendl;
+ Mutex::Locker l(flush_lock);
+ ++flush_waiters;
+ flush_waiter_seqs.insert(cur_seq);
+ while (cur_seq > completed_op_seq.load()) {
+ flush_cond.Wait(flush_lock);
+ }
+ flush_waiter_seqs.erase(cur_seq);
+ --flush_waiters;
+ }
+ }
+
+ void start() {
+ int r = rte_eal_remote_launch(dpdk_thread_adaptor, static_cast<void*>(&run_func),
+ core_id);
+ assert(r == 0);
+
+ }
+
+ void stop() {
+ {
+ Mutex::Locker l(queue_lock);
+ aio_stop = true;
+ queue_cond.Signal();
+ }
+ int r = rte_eal_wait_lcore(core_id);
+ assert(r == 0);
+ aio_stop = false;
+ }
+
+ ~SharedDriverQueueData() {
+ g_ceph_context->get_perfcounters_collection()->remove(logger);
+ if (!qpair) {
+ spdk_nvme_ctrlr_free_io_qpair(qpair);
+ }
+ delete logger;
+ }
+};
+
+class SharedDriverData {
+ unsigned id;
+ uint32_t core_id;
+
+ std::string sn;
+ spdk_nvme_ctrlr *ctrlr;
+ spdk_nvme_ns *ns;
+ uint64_t block_size = 0;
+ uint32_t sector_size = 0;
+ uint64_t size = 0;
+ uint32_t queue_number;
+ std::vector<SharedDriverQueueData*> queues;
+
+ void _aio_start() {
+ for (auto &&it : queues)
+ it->start();
+ }
+ void _aio_stop() {
+ for (auto &&it : queues)
+ it->stop();
+ }
+
+ public:
+ std::vector<NVMEDevice*> registered_devices;
+ SharedDriverData(unsigned _id, const std::string &sn_tag,
+ spdk_nvme_ctrlr *c, spdk_nvme_ns *ns)
+ : id(_id),
+ sn(sn_tag),
+ ctrlr(c),
+ ns(ns) {
+ int i;
+ sector_size = spdk_nvme_ns_get_sector_size(ns);
+ block_size = std::max(CEPH_PAGE_SIZE, sector_size);
+ size = ((uint64_t)sector_size) * spdk_nvme_ns_get_num_sectors(ns);
+
+ RTE_LCORE_FOREACH_SLAVE(i) {
+ queues.push_back(new SharedDriverQueueData(this, ctrlr, ns, block_size, sn, sector_size, i, queue_number++));
+ }
+
+ _aio_start();
+ }
+
+ bool is_equal(const string &tag) const { return sn == tag; }
+ ~SharedDriverData() {
+ for (auto p : queues) {
+ delete p;
+ }
+ }
+
+ SharedDriverQueueData *get_queue(uint32_t i) {
+ return queues.at(i%queue_number);
+ }
+
+ void register_device(NVMEDevice *device) {
+ // in case of registered_devices, we stop thread now.
+ // Because release is really a rare case, we could bear this
+ _aio_stop();
+ registered_devices.push_back(device);
+ _aio_start();
+ }
+
+ void remove_device(NVMEDevice *device) {
+ _aio_stop();
+ std::vector<NVMEDevice*> new_devices;
+ for (auto &&it : registered_devices) {
+ if (it != device)
+ new_devices.push_back(it);
+ }
+ registered_devices.swap(new_devices);
+ _aio_start();
+ }
+
+ uint64_t get_block_size() {
+ return block_size;
+ }
+ uint64_t get_size() {
+ return size;
+ }
+};
+
+struct Task {
+ NVMEDevice *device;
+ IOContext *ctx = nullptr;
+ IOCommand command;
+ uint64_t offset;
+ uint64_t len;
+ bufferlist write_bl;
+ std::function<void()> fill_cb;
+ Task *next = nullptr;
+ int64_t return_code;
+ ceph::coarse_real_clock::time_point start;
+ IORequest io_request;
+ std::mutex lock;
+ std::condition_variable cond;
+ SharedDriverQueueData *queue;
+ Task(NVMEDevice *dev, IOCommand c, uint64_t off, uint64_t l, int64_t rc = 0)
+ : device(dev), command(c), offset(off), len(l),
+ return_code(rc),
+ start(ceph::coarse_real_clock::now()) {}
+ ~Task() {
+ assert(!io_request.nseg);
+ }
+ void release_segs(SharedDriverQueueData *queue_data) {
+ if (io_request.extra_segs) {
+ for (uint16_t i = 0; i < io_request.nseg; i++)
+ queue_data->data_buf_mempool.push_back(io_request.extra_segs[i]);
+ delete io_request.extra_segs;
+ } else if (io_request.nseg) {
+ for (uint16_t i = 0; i < io_request.nseg; i++)
+ queue_data->data_buf_mempool.push_back(io_request.inline_segs[i]);
+ }
+ io_request.nseg = 0;
+ }
+
+ void copy_to_buf(char *buf, uint64_t off, uint64_t len) {
+ uint64_t copied = 0;
+ uint64_t left = len;
+ void **segs = io_request.extra_segs ? io_request.extra_segs : io_request.inline_segs;
+ uint16_t i = 0;
+ while (left > 0) {
+ char *src = static_cast<char*>(segs[i++]);
+ uint64_t need_copy = std::min(left, data_buffer_size-off);
+ memcpy(buf+copied, src+off, need_copy);
+ off = 0;
+ left -= need_copy;
+ copied += need_copy;
+ }
+ }
+
+ void io_wait() {
+ std::unique_lock<std::mutex> l(lock);
+ cond.wait(l);
+ }
+
+ void io_wake() {
+ std::lock_guard<std::mutex> l(lock);
+ cond.notify_all();
+ }
+};
+
+static void data_buf_reset_sgl(void *cb_arg, uint32_t sgl_offset)
+{
+ Task *t = static_cast<Task*>(cb_arg);
+ uint32_t i = sgl_offset / data_buffer_size;
+ uint32_t offset = i * data_buffer_size;
+ assert(i <= t->io_request.nseg);
+
+ for (; i < t->io_request.nseg; i++) {
+ offset += data_buffer_size;
+ if (offset > sgl_offset) {
+ if (offset > t->len)
+ offset = t->len;
+ break;
+ }
+ }
+
+ t->io_request.cur_seg_idx = i;
+ t->io_request.cur_seg_left = offset - sgl_offset;
+ return ;
+}
+
+static int data_buf_next_sge(void *cb_arg, void **address, uint32_t *length)
+{
+ uint32_t size;
+ void *addr;
+ Task *t = static_cast<Task*>(cb_arg);
+ if (t->io_request.cur_seg_idx >= t->io_request.nseg) {
+ *length = 0;
+ *address = 0;
+ return 0;
+ }
+
+ addr = t->io_request.extra_segs ? t->io_request.extra_segs[t->io_request.cur_seg_idx] : t->io_request.inline_segs[t->io_request.cur_seg_idx];
+
+ size = data_buffer_size;
+ if (t->io_request.cur_seg_idx == t->io_request.nseg - 1) {
+ uint64_t tail = t->len % data_buffer_size;
+ if (tail) {
+ size = (uint32_t) tail;
+ }
+ }
+
+ if (t->io_request.cur_seg_left) {
+ *address = (void *)((uint64_t)addr + size - t->io_request.cur_seg_left);
+ *length = t->io_request.cur_seg_left;
+ t->io_request.cur_seg_left = 0;
+ } else {
+ *address = addr;
+ *length = size;
+ }
+
+ t->io_request.cur_seg_idx++;
+ return 0;
+}
+
+int SharedDriverQueueData::alloc_buf_from_pool(Task *t, bool write)
+{
+ uint64_t count = t->len / data_buffer_size;
+ if (t->len % data_buffer_size)
+ ++count;
+ void **segs;
+ if (count > data_buf_mempool.size())
+ return -ENOMEM;
+ if (count <= inline_segment_num) {
+ segs = t->io_request.inline_segs;
+ } else {
+ t->io_request.extra_segs = new void*[count];
+ segs = t->io_request.extra_segs;
+ }
+ for (uint16_t i = 0; i < count; i++) {
+ segs[i] = data_buf_mempool.back();
+ data_buf_mempool.pop_back();
+ }
+ t->io_request.nseg = count;
+ if (write) {
+ auto blp = t->write_bl.begin();
+ uint32_t len = 0;
+ uint16_t i = 0;
+ for (; i < count - 1; ++i) {
+ blp.copy(data_buffer_size, static_cast<char*>(segs[i]));
+ len += data_buffer_size;
+ }
+ blp.copy(t->write_bl.length() - len, static_cast<char*>(segs[i]));
+ }
+
+ return 0;
+}
+
+void SharedDriverQueueData::_aio_thread()
+{
+ dout(1) << __func__ << " start" << dendl;
+
+ if (data_buf_mempool.empty()) {
+ for (uint16_t i = 0; i < data_buffer_default_num; i++) {
+ void *b = spdk_zmalloc(data_buffer_size, CEPH_PAGE_SIZE, NULL);
+ if (!b) {
+ derr << __func__ << " failed to create memory pool for nvme data buffer" << dendl;
+ assert(b);
+ }
+ data_buf_mempool.push_back(b);
+ }
+ }
+
+ Task *t = nullptr;
+ int r = 0;
+ uint64_t lba_off, lba_count;
+
+ ceph::coarse_real_clock::time_point cur, start
+ = ceph::coarse_real_clock::now();
+ while (true) {
+ bool inflight = queue_op_seq.load() - completed_op_seq.load();
+ again:
+ dout(40) << __func__ << " polling" << dendl;
+ if (inflight) {
+ if (!spdk_nvme_qpair_process_completions(qpair, g_conf->bluestore_spdk_max_io_completion)) {
+ dout(30) << __func__ << " idle, have a pause" << dendl;
+ _mm_pause();
+ }
+ }
+
+ for (; t; t = t->next) {
+ t->queue = this;
+ lba_off = t->offset / sector_size;
+ lba_count = t->len / sector_size;
+ switch (t->command) {
+ case IOCommand::WRITE_COMMAND:
+ {
+ dout(20) << __func__ << " write command issued " << lba_off << "~" << lba_count << dendl;
+ r = alloc_buf_from_pool(t, true);
+ if (r < 0) {
+ logger->inc(l_bluestore_nvmedevice_buffer_alloc_failed);
+ goto again;
+ }
+
+ r = spdk_nvme_ns_cmd_writev(
+ ns, qpair, lba_off, lba_count, io_complete, t, 0,
+ data_buf_reset_sgl, data_buf_next_sge);
+ if (r < 0) {
+ derr << __func__ << " failed to do write command" << dendl;
+ t->ctx->nvme_task_first = t->ctx->nvme_task_last = nullptr;
+ t->release_segs(this);
+ delete t;
+ ceph_abort();
+ }
+ cur = ceph::coarse_real_clock::now();
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(cur - start);
+ logger->tinc(l_bluestore_nvmedevice_aio_write_queue_lat, dur);
+ break;
+ }
+ case IOCommand::READ_COMMAND:
+ {
+ dout(20) << __func__ << " read command issued " << lba_off << "~" << lba_count << dendl;
+ r = alloc_buf_from_pool(t, false);
+ if (r < 0) {
+ logger->inc(l_bluestore_nvmedevice_buffer_alloc_failed);
+ goto again;
+ }
+
+ r = spdk_nvme_ns_cmd_readv(
+ ns, qpair, lba_off, lba_count, io_complete, t, 0,
+ data_buf_reset_sgl, data_buf_next_sge);
+ if (r < 0) {
+ derr << __func__ << " failed to read" << dendl;
+ t->release_segs(this);
+ delete t;
+ ceph_abort();
+ } else {
+ cur = ceph::coarse_real_clock::now();
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(cur - start);
+ logger->tinc(l_bluestore_nvmedevice_read_queue_lat, dur);
+ }
+ break;
+ }
+ case IOCommand::FLUSH_COMMAND:
+ {
+ dout(20) << __func__ << " flush command issueed " << dendl;
+ r = spdk_nvme_ns_cmd_flush(ns, qpair, io_complete, t);
+ if (r < 0) {
+ derr << __func__ << " failed to flush" << dendl;
+ t->release_segs(this);
+ delete t;
+ ceph_abort();
+ } else {
+ cur = ceph::coarse_real_clock::now();
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(cur - start);
+ logger->tinc(l_bluestore_nvmedevice_flush_queue_lat, dur);
+ }
+ break;
+ }
+ }
+ }
+
+ if (!queue_empty.load()) {
+ Mutex::Locker l(queue_lock);
+ if (!task_queue.empty()) {
+ t = task_queue.front();
+ task_queue.pop();
+ logger->set(l_bluestore_nvmedevice_queue_ops, task_queue.size());
+ }
+ if (!t)
+ queue_empty = true;
+ } else {
+ if (flush_waiters.load()) {
+ Mutex::Locker l(flush_lock);
+ if (*flush_waiter_seqs.begin() <= completed_op_seq.load())
+ flush_cond.Signal();
+ }
+
+ if (!inflight) {
+ // be careful, here we need to let each thread reap its own, currently it is done
+ // by only one dedicatd dpdk thread
+ if(!queueid) {
+ for (auto &&it : driver->registered_devices)
+ it->reap_ioc();
+ }
+
+ Mutex::Locker l(queue_lock);
+ if (queue_empty.load()) {
+ cur = ceph::coarse_real_clock::now();
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(cur - start);
+ logger->tinc(l_bluestore_nvmedevice_polling_lat, dur);
+ if (aio_stop)
+ break;
+ queue_cond.Wait(queue_lock);
+ start = ceph::coarse_real_clock::now();
+ }
+ }
+ }
+ }
+ assert(data_buf_mempool.size() == data_buffer_default_num);
+ dout(1) << __func__ << " end" << dendl;
+}
+
+#define dout_subsys ceph_subsys_bdev
+#undef dout_prefix
+#define dout_prefix *_dout << "bdev "
+
+class NVMEManager {
+ public:
+ struct ProbeContext {
+ string sn_tag;
+ NVMEManager *manager;
+ SharedDriverData *driver;
+ bool done;
+ };
+
+ private:
+ Mutex lock;
+ bool init = false;
+ std::vector<SharedDriverData*> shared_driver_datas;
+ std::thread dpdk_thread;
+ std::mutex probe_queue_lock;
+ std::condition_variable probe_queue_cond;
+ std::list<ProbeContext*> probe_queue;
+
+ public:
+ NVMEManager()
+ : lock("NVMEDevice::NVMEManager::lock") {}
+ int try_get(const string &sn_tag, SharedDriverData **driver);
+ void register_ctrlr(const string &sn_tag, spdk_nvme_ctrlr *c, struct spdk_pci_device *pci_dev,
+ SharedDriverData **driver) {
+ assert(lock.is_locked());
+ spdk_nvme_ns *ns;
+ int num_ns = spdk_nvme_ctrlr_get_num_ns(c);
+ assert(num_ns >= 1);
+ if (num_ns > 1) {
+ dout(0) << __func__ << " namespace count larger than 1, currently only use the first namespace" << dendl;
+ }
+ ns = spdk_nvme_ctrlr_get_ns(c, 1);
+ if (!ns) {
+ derr << __func__ << " failed to get namespace at 1" << dendl;
+ ceph_abort();
+ }
+ dout(1) << __func__ << " successfully attach nvme device at" << spdk_pci_device_get_bus(pci_dev)
+ << ":" << spdk_pci_device_get_dev(pci_dev) << ":" << spdk_pci_device_get_func(pci_dev) << dendl;
+
+ // only support one device per osd now!
+ assert(shared_driver_datas.empty());
+ // index 0 is occured by master thread
+ shared_driver_datas.push_back(new SharedDriverData(shared_driver_datas.size()+1, sn_tag, c, ns));
+ *driver = shared_driver_datas.back();
+ }
+};
+
+static NVMEManager manager;
+
+static bool probe_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid, struct spdk_nvme_ctrlr_opts *opts)
+{
+ NVMEManager::ProbeContext *ctx = static_cast<NVMEManager::ProbeContext*>(cb_ctx);
+ char serial_number[128];
+ struct spdk_pci_addr pci_addr;
+ struct spdk_pci_device *pci_dev = NULL;
+ int result = 0;
+
+ if (trid->trtype != SPDK_NVME_TRANSPORT_PCIE) {
+ dout(0) << __func__ << " only probe local nvme device" << dendl;
+ return false;
+ }
+
+ result = spdk_pci_addr_parse(&pci_addr, trid->traddr);
+ if (result) {
+ dout(0) << __func__ << " failed to get pci address from %s, " << trid->traddr << " return value is: %d" << result << dendl;
+ return false;
+ }
+
+ pci_dev = spdk_pci_get_device(&pci_addr);
+ if (!pci_dev) {
+ dout(0) << __func__ << " failed to get pci device" << dendl;
+ return false;
+ }
+
+ dout(0) << __func__ << " found device at bus: " << spdk_pci_device_get_bus(pci_dev)
+ << ":" << spdk_pci_device_get_dev(pci_dev) << ":"
+ << spdk_pci_device_get_func(pci_dev) << " vendor:0x" << spdk_pci_device_get_vendor_id(pci_dev) << " device:0x" << spdk_pci_device_get_device_id(pci_dev)
+ << dendl;
+ result = spdk_pci_device_get_serial_number(pci_dev, serial_number, 128);
+ if (result < 0) {
+ dout(10) << __func__ << " failed to get serial number from %p" << pci_dev << dendl;
+ return false;
+ }
+
+ if (ctx->sn_tag.compare(string(serial_number, 16))) {
+ dout(0) << __func__ << " device serial number (" << ctx->sn_tag << ") not match " << serial_number << dendl;
+ return false;
+ }
+
+ return true;
+}
+
+static void attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
+ struct spdk_nvme_ctrlr *ctrlr, const struct spdk_nvme_ctrlr_opts *opts)
+{
+ struct spdk_pci_addr pci_addr;
+ struct spdk_pci_device *pci_dev = NULL;
+
+ spdk_pci_addr_parse(&pci_addr, trid->traddr);
+
+ pci_dev = spdk_pci_get_device(&pci_addr);
+ if (!pci_dev) {
+ dout(0) << __func__ << " failed to get pci device" << dendl;
+ assert(pci_dev);
+ }
+
+ NVMEManager::ProbeContext *ctx = static_cast<NVMEManager::ProbeContext*>(cb_ctx);
+ ctx->manager->register_ctrlr(ctx->sn_tag, ctrlr, pci_dev, &ctx->driver);
+}
+
+int NVMEManager::try_get(const string &sn_tag, SharedDriverData **driver)
+{
+ Mutex::Locker l(lock);
+ int r = 0;
+ unsigned long long core_value;
+ uint32_t core_num = 0;
+ int m_core_arg = -1;
+ uint32_t mem_size_arg = g_conf->bluestore_spdk_mem;
+ char *coremask_arg = (char *)g_conf->bluestore_spdk_coremask.c_str();
+
+ if (sn_tag.empty()) {
+ r = -ENOENT;
+ derr << __func__ << " empty serial number: " << cpp_strerror(r) << dendl;
+ return r;
+ }
+
+ core_value = strtoll(coremask_arg, NULL, 16);
+ for (uint32_t i = 0; i < sizeof(long long) * 8; i++) {
+ bool tmp = (core_value >> i) & 0x1;
+ if (tmp) {
+ core_num += 1;
+ // select the least signficant bit as the master core
+ if(m_core_arg < 0) {
+ m_core_arg = i;
+ }
+ }
+ }
+
+ // at least two cores are needed for using spdk
+ if (core_num < 2) {
+ r = -ENOENT;
+ derr << __func__ << " invalid spdk coremask, at least two cores are needed: "
+ << cpp_strerror(r) << dendl;
+ return r;
+ }
+
+ for (auto &&it : shared_driver_datas) {
+ if (it->is_equal(sn_tag)) {
+ *driver = it;
+ return 0;
+ }
+ }
+
+ if (!init) {
+ init = true;
+ dpdk_thread = std::thread(
+ [this, coremask_arg, m_core_arg, mem_size_arg]() {
+ static struct spdk_env_opts opts;
+ int r;
+
+ spdk_env_opts_init(&opts);
+ opts.name = "ceph-osd";
+ opts.core_mask = coremask_arg;
+ opts.dpdk_master_core = m_core_arg;
+ opts.dpdk_mem_size = mem_size_arg;
+ spdk_env_init(&opts);
+
+ spdk_nvme_retry_count = g_ceph_context->_conf->bdev_nvme_retry_count;
+ if (spdk_nvme_retry_count < 0)
+ spdk_nvme_retry_count = SPDK_NVME_DEFAULT_RETRY_COUNT;
+
+ std::unique_lock<std::mutex> l(probe_queue_lock);
+ while (true) {
+ if (!probe_queue.empty()) {
+ ProbeContext* ctxt = probe_queue.front();
+ probe_queue.pop_front();
+ r = spdk_nvme_probe(NULL, ctxt, probe_cb, attach_cb, NULL);
+ if (r < 0) {
+ assert(!ctxt->driver);
+ derr << __func__ << " device probe nvme failed" << dendl;
+ }
+ ctxt->done = true;
+ probe_queue_cond.notify_all();
+ } else {
+ probe_queue_cond.wait(l);
+ }
+ }
+ }
+ );
+ dpdk_thread.detach();
+ }
+
+ ProbeContext ctx = {sn_tag, this, nullptr, false};
+ {
+ std::unique_lock<std::mutex> l(probe_queue_lock);
+ probe_queue.push_back(&ctx);
+ while (!ctx.done)
+ probe_queue_cond.wait(l);
+ }
+ if (!ctx.driver)
+ return -1;
+ *driver = ctx.driver;
+
+ return 0;
+}
+
+void io_complete(void *t, const struct spdk_nvme_cpl *completion)
+{
+ Task *task = static_cast<Task*>(t);
+ IOContext *ctx = task->ctx;
+ SharedDriverQueueData *queue = task->queue;
+
+ assert(queue != NULL);
+ assert(ctx != NULL);
+ ++queue->completed_op_seq;
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(
+ ceph::coarse_real_clock::now() - task->start);
+ if (task->command == IOCommand::WRITE_COMMAND) {
+ queue->logger->tinc(l_bluestore_nvmedevice_aio_write_lat, dur);
+ assert(!spdk_nvme_cpl_is_error(completion));
+ dout(20) << __func__ << " write/zero op successfully, left "
+ << queue->queue_op_seq - queue->completed_op_seq << dendl;
+ // check waiting count before doing callback (which may
+ // destroy this ioc).
+ if (ctx->priv) {
+ if (!--ctx->num_running) {
+ task->device->aio_callback(task->device->aio_callback_priv, ctx->priv);
+ }
+ } else {
+ ctx->try_aio_wake();
+ }
+ task->release_segs(queue);
+ delete task;
+ } else if (task->command == IOCommand::READ_COMMAND) {
+ queue->logger->tinc(l_bluestore_nvmedevice_read_lat, dur);
+ assert(!spdk_nvme_cpl_is_error(completion));
+ dout(20) << __func__ << " read op successfully" << dendl;
+ task->fill_cb();
+ task->release_segs(queue);
+ // read submitted by AIO
+ if(!task->return_code) {
+ if (ctx->priv) {
+ if (!--ctx->num_running) {
+ task->device->aio_callback(task->device->aio_callback_priv, ctx->priv);
+ }
+ } else {
+ ctx->try_aio_wake();
+ }
+ delete task;
+ } else {
+ task->return_code = 0;
+ if (!--ctx->num_running) {
+ task->io_wake();
+ }
+ }
+ } else {
+ assert(task->command == IOCommand::FLUSH_COMMAND);
+ assert(!spdk_nvme_cpl_is_error(completion));
+ queue->logger->tinc(l_bluestore_nvmedevice_flush_lat, dur);
+ dout(20) << __func__ << " flush op successfully" << dendl;
+ task->return_code = 0;
+ }
+}
+
+// ----------------
+#undef dout_prefix
+#define dout_prefix *_dout << "bdev(" << name << ") "
+
+NVMEDevice::NVMEDevice(CephContext* cct, aio_callback_t cb, void *cbpriv)
+ : BlockDevice(cct),
+ driver(nullptr),
+ size(0),
+ block_size(0),
+ aio_stop(false),
+ buffer_lock("NVMEDevice::buffer_lock"),
+ aio_callback(cb),
+ aio_callback_priv(cbpriv)
+{
+}
+
+
+int NVMEDevice::open(const string& p)
+{
+ int r = 0;
+ dout(1) << __func__ << " path " << p << dendl;
+
+ string serial_number;
+ int fd = ::open(p.c_str(), O_RDONLY);
+ if (fd < 0) {
+ r = -errno;
+ derr << __func__ << " unable to open " << p << ": " << cpp_strerror(r)
+ << dendl;
+ return r;
+ }
+ char buf[100];
+ r = ::read(fd, buf, sizeof(buf));
+ VOID_TEMP_FAILURE_RETRY(::close(fd));
+ fd = -1; // defensive
+ if (r <= 0) {
+ if (r == 0) {
+ r = -EINVAL;
+ } else {
+ r = -errno;
+ }
+ derr << __func__ << " unable to read " << p << ": " << cpp_strerror(r) << dendl;
+ return r;
+ }
+ /* scan buf from the beginning with isxdigit. */
+ int i = 0;
+ while (i < r && isxdigit(buf[i])) {
+ i++;
+ }
+ serial_number = string(buf, i);
+ r = manager.try_get(serial_number, &driver);
+ if (r < 0) {
+ derr << __func__ << " failed to get nvme device with sn " << serial_number << dendl;
+ return r;
+ }
+
+ driver->register_device(this);
+ block_size = driver->get_block_size();
+ size = driver->get_size();
+ name = serial_number;
+
+ //nvme is non-rotational device.
+ rotational = false;
+
+ // round size down to an even block
+ size &= ~(block_size - 1);
+
+ dout(1) << __func__ << " size " << size << " (" << pretty_si_t(size) << "B)"
+ << " block_size " << block_size << " (" << pretty_si_t(block_size)
+ << "B)" << dendl;
+
+ return 0;
+}
+
+void NVMEDevice::close()
+{
+ dout(1) << __func__ << dendl;
+
+ name.clear();
+ driver->remove_device(this);
+
+ dout(1) << __func__ << " end" << dendl;
+}
+
+int NVMEDevice::collect_metadata(string prefix, map<string,string> *pm) const
+{
+ (*pm)[prefix + "rotational"] = "0";
+ (*pm)[prefix + "size"] = stringify(get_size());
+ (*pm)[prefix + "block_size"] = stringify(get_block_size());
+ (*pm)[prefix + "driver"] = "NVMEDevice";
+ (*pm)[prefix + "type"] = "nvme";
+ (*pm)[prefix + "access_mode"] = "spdk";
+ (*pm)[prefix + "nvme_serial_number"] = name;
+
+ return 0;
+}
+
+int NVMEDevice::flush()
+{
+ dout(10) << __func__ << " start" << dendl;
+ auto start = ceph::coarse_real_clock::now();
+
+ if(queue_id == -1)
+ queue_id = ceph_gettid();
+ SharedDriverQueueData *queue = driver->get_queue(queue_id);
+ assert(queue != NULL);
+ queue->flush_wait();
+ auto dur = std::chrono::duration_cast<std::chrono::nanoseconds>(
+ ceph::coarse_real_clock::now() - start);
+ queue->logger->tinc(l_bluestore_nvmedevice_flush_lat, dur);
+ return 0;
+}
+
+void NVMEDevice::aio_submit(IOContext *ioc)
+{
+ dout(20) << __func__ << " ioc " << ioc << " pending "
+ << ioc->num_pending.load() << " running "
+ << ioc->num_running.load() << dendl;
+ int pending = ioc->num_pending.load();
+ Task *t = static_cast<Task*>(ioc->nvme_task_first);
+ if (pending && t) {
+ ioc->num_running += pending;
+ ioc->num_pending -= pending;
+ assert(ioc->num_pending.load() == 0); // we should be only thread doing this
+ // Only need to push the first entry
+ if(queue_id == -1)
+ queue_id = ceph_gettid();
+ driver->get_queue(queue_id)->queue_task(t, pending);
+ ioc->nvme_task_first = ioc->nvme_task_last = nullptr;
+ }
+}
+
+int NVMEDevice::aio_write(
+ uint64_t off,
+ bufferlist &bl,
+ IOContext *ioc,
+ bool buffered)
+{
+ uint64_t len = bl.length();
+ dout(20) << __func__ << " " << off << "~" << len << " ioc " << ioc
+ << " buffered " << buffered << dendl;
+ assert(off % block_size == 0);
+ assert(len % block_size == 0);
+ assert(len > 0);
+ assert(off < size);
+ assert(off + len <= size);
+
+ Task *t = new Task(this, IOCommand::WRITE_COMMAND, off, len);
+
+ // TODO: if upper layer alloc memory with known physical address,
+ // we can reduce this copy
+ t->write_bl = std::move(bl);
+
+ if (buffered) {
+ // Only need to push the first entry
+ if(queue_id == -1)
+ queue_id = ceph_gettid();
+ driver->get_queue(queue_id)->queue_task(t);
+ } else {
+ t->ctx = ioc;
+ Task *first = static_cast<Task*>(ioc->nvme_task_first);
+ Task *last = static_cast<Task*>(ioc->nvme_task_last);
+ if (last)
+ last->next = t;
+ if (!first)
+ ioc->nvme_task_first = t;
+ ioc->nvme_task_last = t;
+ ++ioc->num_pending;
+ }
+
+ dout(5) << __func__ << " " << off << "~" << len << dendl;
+
+ return 0;
+}
+
+int NVMEDevice::write(uint64_t off, bufferlist &bl, bool buffered)
+{
+ // FIXME: there is presumably a more efficient way to do this...
+ IOContext ioc(cct, NULL);
+ aio_write(off, bl, &ioc, buffered);
+ ioc.aio_wait();
+ return 0;
+}
+
+int NVMEDevice::read(uint64_t off, uint64_t len, bufferlist *pbl,
+ IOContext *ioc,
+ bool buffered)
+{
+ dout(5) << __func__ << " " << off << "~" << len << " ioc " << ioc << dendl;
+ assert(off % block_size == 0);
+ assert(len % block_size == 0);
+ assert(len > 0);
+ assert(off < size);
+ assert(off + len <= size);
+
+ Task *t = new Task(this, IOCommand::READ_COMMAND, off, len, 1);
+ bufferptr p = buffer::create_page_aligned(len);
+ int r = 0;
+ t->ctx = ioc;
+ char *buf = p.c_str();
+ t->fill_cb = [buf, t]() {
+ t->copy_to_buf(buf, 0, t->len);
+ };
+ ++ioc->num_running;
+ if(queue_id == -1)
+ queue_id = ceph_gettid();
+ driver->get_queue(queue_id)->queue_task(t);
+
+ while(t->return_code > 0) {
+ t->io_wait();
+ }
+ pbl->push_back(std::move(p));
+ r = t->return_code;
+ delete t;
+ return r;
+}
+
+int NVMEDevice::aio_read(
+ uint64_t off,
+ uint64_t len,
+ bufferlist *pbl,
+ IOContext *ioc)
+{
+ dout(20) << __func__ << " " << off << "~" << len << " ioc " << ioc << dendl;
+ assert(off % block_size == 0);
+ assert(len % block_size == 0);
+ assert(len > 0);
+ assert(off < size);
+ assert(off + len <= size);
+
+ Task *t = new Task(this, IOCommand::READ_COMMAND, off, len);
+
+ bufferptr p = buffer::create_page_aligned(len);
+ pbl->append(p);
+ t->ctx = ioc;
+ char *buf = p.c_str();
+ t->fill_cb = [buf, t]() {
+ t->copy_to_buf(buf, 0, t->len);
+ };
+
+ Task *first = static_cast<Task*>(ioc->nvme_task_first);
+ Task *last = static_cast<Task*>(ioc->nvme_task_last);
+ if (last)
+ last->next = t;
+ if (!first)
+ ioc->nvme_task_first = t;
+ ioc->nvme_task_last = t;
+ ++ioc->num_pending;
+
+ return 0;
+}
+
+int NVMEDevice::read_random(uint64_t off, uint64_t len, char *buf, bool buffered)
+{
+ assert(len > 0);
+ assert(off < size);
+ assert(off + len <= size);
+
+ uint64_t aligned_off = align_down(off, block_size);
+ uint64_t aligned_len = align_up(off+len, block_size) - aligned_off;
+ dout(5) << __func__ << " " << off << "~" << len
+ << " aligned " << aligned_off << "~" << aligned_len << dendl;
+ IOContext ioc(g_ceph_context, nullptr);
+ Task *t = new Task(this, IOCommand::READ_COMMAND, aligned_off, aligned_len, 1);
+ int r = 0;
+ t->ctx = &ioc;
+ t->fill_cb = [buf, t, off, len]() {
+ t->copy_to_buf(buf, off-t->offset, len);
+ };
+ ++ioc.num_running;
+ if(queue_id == -1)
+ queue_id = ceph_gettid();
+ driver->get_queue(queue_id)->queue_task(t);
+
+ while(t->return_code > 0) {
+ t->io_wait();
+ }
+ r = t->return_code;
+ delete t;
+ return r;
+}
+
+int NVMEDevice::invalidate_cache(uint64_t off, uint64_t len)
+{
+ dout(5) << __func__ << " " << off << "~" << len << dendl;
+ return 0;
+}
Code Review / stor4nfv.git / blobdiff