+++ /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