--- /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) 2014 Red Hat
+ * Copyright (C) 2020 Abutalib Aghayev
+ *
+ * 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 <sys/file.h>
+
+#include "HMSMRDevice.h"
+#include "include/intarith.h"
+#include "include/types.h"
+#include "include/compat.h"
+#include "include/scope_guard.h"
+#include "include/stringify.h"
+#include "common/blkdev.h"
+#include "common/errno.h"
+#if defined(__FreeBSD__)
+#include "bsm/audit_errno.h"
+#endif
+#include "common/debug.h"
+#include "common/numa.h"
+
+#include "kernel/io_uring.h"
+
+extern "C" {
+#include <libzbd/zbd.h>
+}
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_bdev
+#undef dout_prefix
+#define dout_prefix *_dout << "smrbdev(" << this << " " << path << ") "
+
+HMSMRDevice::HMSMRDevice(CephContext* cct, aio_callback_t cb, void *cbpriv, aio_callback_t d_cb, void *d_cbpriv)
+ : BlockDevice(cct, cb, cbpriv),
+ aio(false), dio(false),
+ discard_callback(d_cb),
+ discard_callback_priv(d_cbpriv),
+ aio_stop(false),
+ discard_started(false),
+ discard_stop(false),
+ aio_thread(this),
+ discard_thread(this),
+ injecting_crash(0)
+{
+ fd_directs.resize(WRITE_LIFE_MAX, -1);
+ fd_buffereds.resize(WRITE_LIFE_MAX, -1);
+
+ bool use_ioring = cct->_conf.get_val<bool>("bdev_ioring");
+ unsigned int iodepth = cct->_conf->bdev_aio_max_queue_depth;
+
+ if (use_ioring && ioring_queue_t::supported()) {
+ bool use_ioring_hipri = cct->_conf.get_val<bool>("bdev_ioring_hipri");
+ bool use_ioring_sqthread_poll = cct->_conf.get_val<bool>("bdev_ioring_sqthread_poll");
+ io_queue = std::make_unique<ioring_queue_t>(iodepth, use_ioring_hipri, use_ioring_sqthread_poll);
+ } else {
+ static bool once;
+ if (use_ioring && !once) {
+ derr << "WARNING: io_uring API is not supported! Fallback to libaio!"
+ << dendl;
+ once = true;
+ }
+ io_queue = std::make_unique<aio_queue_t>(iodepth);
+ }
+}
+
+bool HMSMRDevice::support(const std::string& path)
+{
+ return zbd_device_is_zoned(path.c_str()) == 1;
+}
+
+int HMSMRDevice::_lock()
+{
+ dout(10) << __func__ << " " << fd_directs[WRITE_LIFE_NOT_SET] << dendl;
+ int r = ::flock(fd_directs[WRITE_LIFE_NOT_SET], LOCK_EX | LOCK_NB);
+ if (r < 0) {
+ derr << __func__ << " flock failed on " << path << dendl;
+ return -errno;
+ }
+ return 0;
+}
+
+bool HMSMRDevice::set_smr_params(const std::string& path) {
+ dout(10) << __func__ << " opening " << path << dendl;
+
+ int dev = zbd_open(path.c_str(), O_RDWR | O_DIRECT | O_LARGEFILE, nullptr);
+ if (dev < 0) {
+ return false;
+ }
+ auto close_dev = make_scope_guard([dev] { zbd_close(dev); });
+
+ unsigned int nr_zones = 0;
+ if (zbd_report_nr_zones(dev, 0, 0, ZBD_RO_NOT_WP, &nr_zones) != 0) {
+ return false;
+ }
+
+ std::vector<zbd_zone> zones(nr_zones);
+ if (zbd_report_zones(dev, 0, 0, ZBD_RO_NOT_WP, zones.data(), &nr_zones) != 0) {
+ return false;
+ }
+
+ zone_size = zbd_zone_len(&zones[0]);
+ conventional_region_size = nr_zones * zone_size;
+
+ dout(10) << __func__ << " setting zone size to " << zone_size
+ << " and conventional region size to " << conventional_region_size
+ << dendl;
+
+ return true;
+}
+
+int HMSMRDevice::open(const string& p)
+{
+ path = p;
+ int r = 0, i = 0;
+ dout(1) << __func__ << " path " << path << dendl;
+
+ for (i = 0; i < WRITE_LIFE_MAX; i++) {
+ int fd = ::open(path.c_str(), O_RDWR | O_DIRECT);
+ if (fd < 0) {
+ r = -errno;
+ break;
+ }
+ fd_directs[i] = fd;
+
+ fd = ::open(path.c_str(), O_RDWR | O_CLOEXEC);
+ if (fd < 0) {
+ r = -errno;
+ break;
+ }
+ fd_buffereds[i] = fd;
+ }
+
+ if (i != WRITE_LIFE_MAX) {
+ derr << __func__ << " open got: " << cpp_strerror(r) << dendl;
+ goto out_fail;
+ }
+
+ if (!set_smr_params(p)) {
+ derr << __func__ << " failed to set HM-SMR parameters" << dendl;
+ goto out_fail;
+ }
+
+#if defined(F_SET_FILE_RW_HINT)
+ for (i = WRITE_LIFE_NONE; i < WRITE_LIFE_MAX; i++) {
+ if (fcntl(fd_directs[i], F_SET_FILE_RW_HINT, &i) < 0) {
+ r = -errno;
+ break;
+ }
+ if (fcntl(fd_buffereds[i], F_SET_FILE_RW_HINT, &i) < 0) {
+ r = -errno;
+ break;
+ }
+ }
+ if (i != WRITE_LIFE_MAX) {
+ enable_wrt = false;
+ dout(0) << "ioctl(F_SET_FILE_RW_HINT) on " << path << " failed: " << cpp_strerror(r) << dendl;
+ }
+#endif
+
+ dio = true;
+ aio = cct->_conf->bdev_aio;
+ if (!aio) {
+ ceph_abort_msg("non-aio not supported");
+ }
+
+ // disable readahead as it will wreak havoc on our mix of
+ // directio/aio and buffered io.
+ r = posix_fadvise(fd_buffereds[WRITE_LIFE_NOT_SET], 0, 0, POSIX_FADV_RANDOM);
+ if (r) {
+ r = -r;
+ derr << __func__ << " posix_fadvise got: " << cpp_strerror(r) << dendl;
+ goto out_fail;
+ }
+
+ if (lock_exclusive) {
+ r = _lock();
+ if (r < 0) {
+ derr << __func__ << " failed to lock " << path << ": " << cpp_strerror(r)
+ << dendl;
+ goto out_fail;
+ }
+ }
+
+ struct stat st;
+ r = ::fstat(fd_directs[WRITE_LIFE_NOT_SET], &st);
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " fstat got " << cpp_strerror(r) << dendl;
+ goto out_fail;
+ }
+
+ // Operate as though the block size is 4 KB. The backing file
+ // blksize doesn't strictly matter except that some file systems may
+ // require a read/modify/write if we write something smaller than
+ // it.
+ block_size = cct->_conf->bdev_block_size;
+ if (block_size != (unsigned)st.st_blksize) {
+ dout(1) << __func__ << " backing device/file reports st_blksize "
+ << st.st_blksize << ", using bdev_block_size "
+ << block_size << " anyway" << dendl;
+ }
+
+
+ {
+ BlkDev blkdev_direct(fd_directs[WRITE_LIFE_NOT_SET]);
+ BlkDev blkdev_buffered(fd_buffereds[WRITE_LIFE_NOT_SET]);
+
+ if (S_ISBLK(st.st_mode)) {
+ int64_t s;
+ r = blkdev_direct.get_size(&s);
+ if (r < 0) {
+ goto out_fail;
+ }
+ size = s;
+ } else {
+ size = st.st_size;
+ }
+
+ char partition[PATH_MAX], devname[PATH_MAX];
+ if ((r = blkdev_buffered.partition(partition, PATH_MAX)) ||
+ (r = blkdev_buffered.wholedisk(devname, PATH_MAX))) {
+ derr << "unable to get device name for " << path << ": "
+ << cpp_strerror(r) << dendl;
+ rotational = true;
+ } else {
+ dout(20) << __func__ << " devname " << devname << dendl;
+ rotational = blkdev_buffered.is_rotational();
+ support_discard = blkdev_buffered.support_discard();
+ this->devname = devname;
+ _detect_vdo();
+ }
+ }
+
+ r = _aio_start();
+ if (r < 0) {
+ goto out_fail;
+ }
+ _discard_start();
+
+ // round size down to an even block
+ size &= ~(block_size - 1);
+
+ dout(1) << __func__
+ << " size " << size
+ << " (0x" << std::hex << size << std::dec << ", "
+ << byte_u_t(size) << ")"
+ << " block_size " << block_size
+ << " (" << byte_u_t(block_size) << ")"
+ << " " << (rotational ? "rotational" : "non-rotational")
+ << " discard " << (support_discard ? "supported" : "not supported")
+ << dendl;
+ return 0;
+
+out_fail:
+ for (i = 0; i < WRITE_LIFE_MAX; i++) {
+ if (fd_directs[i] >= 0) {
+ VOID_TEMP_FAILURE_RETRY(::close(fd_directs[i]));
+ fd_directs[i] = -1;
+ } else {
+ break;
+ }
+ if (fd_buffereds[i] >= 0) {
+ VOID_TEMP_FAILURE_RETRY(::close(fd_buffereds[i]));
+ fd_buffereds[i] = -1;
+ } else {
+ break;
+ }
+ }
+ return r;
+}
+
+int HMSMRDevice::get_devices(std::set<std::string> *ls) const
+{
+ if (devname.empty()) {
+ return 0;
+ }
+ get_raw_devices(devname, ls);
+ return 0;
+}
+
+void HMSMRDevice::close()
+{
+ dout(1) << __func__ << dendl;
+ _aio_stop();
+ _discard_stop();
+
+ if (vdo_fd >= 0) {
+ VOID_TEMP_FAILURE_RETRY(::close(vdo_fd));
+ vdo_fd = -1;
+ }
+
+ for (int i = 0; i < WRITE_LIFE_MAX; i++) {
+ assert(fd_directs[i] >= 0);
+ VOID_TEMP_FAILURE_RETRY(::close(fd_directs[i]));
+ fd_directs[i] = -1;
+
+ assert(fd_buffereds[i] >= 0);
+ VOID_TEMP_FAILURE_RETRY(::close(fd_buffereds[i]));
+ fd_buffereds[i] = -1;
+ }
+ path.clear();
+}
+
+int HMSMRDevice::collect_metadata(const string& prefix, map<string,string> *pm) const
+{
+ (*pm)[prefix + "support_discard"] = stringify((int)(bool)support_discard);
+ (*pm)[prefix + "rotational"] = stringify((int)(bool)rotational);
+ (*pm)[prefix + "size"] = stringify(get_size());
+ (*pm)[prefix + "block_size"] = stringify(get_block_size());
+ (*pm)[prefix + "driver"] = "HMSMRDevice";
+ if (rotational) {
+ (*pm)[prefix + "type"] = "hdd";
+ } else {
+ (*pm)[prefix + "type"] = "ssd";
+ }
+ if (vdo_fd >= 0) {
+ (*pm)[prefix + "vdo"] = "true";
+ uint64_t total, avail;
+ get_vdo_utilization(vdo_fd, &total, &avail);
+ (*pm)[prefix + "vdo_physical_size"] = stringify(total);
+ }
+
+ {
+ string res_names;
+ std::set<std::string> devnames;
+ if (get_devices(&devnames) == 0) {
+ for (auto& dev : devnames) {
+ if (!res_names.empty()) {
+ res_names += ",";
+ }
+ res_names += dev;
+ }
+ if (res_names.size()) {
+ (*pm)[prefix + "devices"] = res_names;
+ }
+ }
+ }
+
+ struct stat st;
+ int r = ::fstat(fd_buffereds[WRITE_LIFE_NOT_SET], &st);
+ if (r < 0)
+ return -errno;
+ if (S_ISBLK(st.st_mode)) {
+ (*pm)[prefix + "access_mode"] = "blk";
+
+ char buffer[1024] = {0};
+ BlkDev blkdev{fd_buffereds[WRITE_LIFE_NOT_SET]};
+ if (r = blkdev.partition(buffer, sizeof(buffer)); r) {
+ (*pm)[prefix + "partition_path"] = "unknown";
+ } else {
+ (*pm)[prefix + "partition_path"] = buffer;
+ }
+ buffer[0] = '\0';
+ if (r = blkdev.partition(buffer, sizeof(buffer)); r) {
+ (*pm)[prefix + "dev_node"] = "unknown";
+ } else {
+ (*pm)[prefix + "dev_node"] = buffer;
+ }
+ if (!r) {
+ return 0;
+ }
+ buffer[0] = '\0';
+ blkdev.model(buffer, sizeof(buffer));
+ (*pm)[prefix + "model"] = buffer;
+
+ buffer[0] = '\0';
+ blkdev.dev(buffer, sizeof(buffer));
+ (*pm)[prefix + "dev"] = buffer;
+
+ // nvme exposes a serial number
+ buffer[0] = '\0';
+ blkdev.serial(buffer, sizeof(buffer));
+ (*pm)[prefix + "serial"] = buffer;
+
+ // numa
+ int node;
+ r = blkdev.get_numa_node(&node);
+ if (r >= 0) {
+ (*pm)[prefix + "numa_node"] = stringify(node);
+ }
+ } else {
+ (*pm)[prefix + "access_mode"] = "file";
+ (*pm)[prefix + "path"] = path;
+ }
+ return 0;
+}
+
+void HMSMRDevice::_detect_vdo()
+{
+ vdo_fd = get_vdo_stats_handle(devname.c_str(), &vdo_name);
+ if (vdo_fd >= 0) {
+ dout(1) << __func__ << " VDO volume " << vdo_name
+ << " maps to " << devname << dendl;
+ } else {
+ dout(20) << __func__ << " no VDO volume maps to " << devname << dendl;
+ }
+ return;
+}
+
+bool HMSMRDevice::get_thin_utilization(uint64_t *total, uint64_t *avail) const
+{
+ if (vdo_fd < 0) {
+ return false;
+ }
+ return get_vdo_utilization(vdo_fd, total, avail);
+}
+
+int HMSMRDevice::choose_fd(bool buffered, int write_hint) const
+{
+ assert(write_hint >= WRITE_LIFE_NOT_SET && write_hint < WRITE_LIFE_MAX);
+ if (!enable_wrt)
+ write_hint = WRITE_LIFE_NOT_SET;
+ return buffered ? fd_buffereds[write_hint] : fd_directs[write_hint];
+}
+
+int HMSMRDevice::flush()
+{
+ // protect flush with a mutex. note that we are not really protecting
+ // data here. instead, we're ensuring that if any flush() caller
+ // sees that io_since_flush is true, they block any racing callers
+ // until the flush is observed. that allows racing threads to be
+ // calling flush while still ensuring that *any* of them that got an
+ // aio completion notification will not return before that aio is
+ // stable on disk: whichever thread sees the flag first will block
+ // followers until the aio is stable.
+ std::lock_guard l(flush_mutex);
+
+ bool expect = true;
+ if (!io_since_flush.compare_exchange_strong(expect, false)) {
+ dout(10) << __func__ << " no-op (no ios since last flush), flag is "
+ << (int)io_since_flush.load() << dendl;
+ return 0;
+ }
+
+ dout(10) << __func__ << " start" << dendl;
+ if (cct->_conf->bdev_inject_crash) {
+ ++injecting_crash;
+ // sleep for a moment to give other threads a chance to submit or
+ // wait on io that races with a flush.
+ derr << __func__ << " injecting crash. first we sleep..." << dendl;
+ sleep(cct->_conf->bdev_inject_crash_flush_delay);
+ derr << __func__ << " and now we die" << dendl;
+ cct->_log->flush();
+ _exit(1);
+ }
+ utime_t start = ceph_clock_now();
+ int r = ::fdatasync(fd_directs[WRITE_LIFE_NOT_SET]);
+ utime_t end = ceph_clock_now();
+ utime_t dur = end - start;
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " fdatasync got: " << cpp_strerror(r) << dendl;
+ ceph_abort();
+ }
+ dout(5) << __func__ << " in " << dur << dendl;;
+ return r;
+}
+
+int HMSMRDevice::_aio_start()
+{
+ if (aio) {
+ dout(10) << __func__ << dendl;
+ int r = io_queue->init(fd_directs);
+ if (r < 0) {
+ if (r == -EAGAIN) {
+ derr << __func__ << " io_setup(2) failed with EAGAIN; "
+ << "try increasing /proc/sys/fs/aio-max-nr" << dendl;
+ } else {
+ derr << __func__ << " io_setup(2) failed: " << cpp_strerror(r) << dendl;
+ }
+ return r;
+ }
+ aio_thread.create("bstore_aio");
+ }
+ return 0;
+}
+
+void HMSMRDevice::_aio_stop()
+{
+ if (aio) {
+ dout(10) << __func__ << dendl;
+ aio_stop = true;
+ aio_thread.join();
+ aio_stop = false;
+ io_queue->shutdown();
+ }
+}
+
+int HMSMRDevice::_discard_start()
+{
+ discard_thread.create("bstore_discard");
+ return 0;
+}
+
+void HMSMRDevice::_discard_stop()
+{
+ dout(10) << __func__ << dendl;
+ {
+ std::unique_lock l(discard_lock);
+ while (!discard_started) {
+ discard_cond.wait(l);
+ }
+ discard_stop = true;
+ discard_cond.notify_all();
+ }
+ discard_thread.join();
+ {
+ std::lock_guard l(discard_lock);
+ discard_stop = false;
+ }
+ dout(10) << __func__ << " stopped" << dendl;
+}
+
+void HMSMRDevice::discard_drain()
+{
+ dout(10) << __func__ << dendl;
+ std::unique_lock l(discard_lock);
+ while (!discard_queued.empty() || discard_running) {
+ discard_cond.wait(l);
+ }
+}
+
+static bool is_expected_ioerr(const int r)
+{
+ // https://lxr.missinglinkelectronics.com/linux+v4.15/block/blk-core.c#L135
+ return (r == -EOPNOTSUPP || r == -ETIMEDOUT || r == -ENOSPC ||
+ r == -ENOLINK || r == -EREMOTEIO || r == -EAGAIN || r == -EIO ||
+ r == -ENODATA || r == -EILSEQ || r == -ENOMEM ||
+#if defined(__linux__)
+ r == -EREMCHG || r == -EBADE
+#elif defined(__FreeBSD__)
+ r == - BSM_ERRNO_EREMCHG || r == -BSM_ERRNO_EBADE
+#endif
+ );
+}
+
+void HMSMRDevice::_aio_thread()
+{
+ dout(10) << __func__ << " start" << dendl;
+ int inject_crash_count = 0;
+ while (!aio_stop) {
+ dout(40) << __func__ << " polling" << dendl;
+ int max = cct->_conf->bdev_aio_reap_max;
+ aio_t *aio[max];
+ int r = io_queue->get_next_completed(cct->_conf->bdev_aio_poll_ms,
+ aio, max);
+ if (r < 0) {
+ derr << __func__ << " got " << cpp_strerror(r) << dendl;
+ ceph_abort_msg("got unexpected error from io_getevents");
+ }
+ if (r > 0) {
+ dout(30) << __func__ << " got " << r << " completed aios" << dendl;
+ for (int i = 0; i < r; ++i) {
+ IOContext *ioc = static_cast<IOContext*>(aio[i]->priv);
+ _aio_log_finish(ioc, aio[i]->offset, aio[i]->length);
+ if (aio[i]->queue_item.is_linked()) {
+ std::lock_guard l(debug_queue_lock);
+ debug_aio_unlink(*aio[i]);
+ }
+
+ // set flag indicating new ios have completed. we do this *before*
+ // any completion or notifications so that any user flush() that
+ // follows the observed io completion will include this io. Note
+ // that an earlier, racing flush() could observe and clear this
+ // flag, but that also ensures that the IO will be stable before the
+ // later flush() occurs.
+ io_since_flush.store(true);
+
+ long r = aio[i]->get_return_value();
+ if (r < 0) {
+ derr << __func__ << " got r=" << r << " (" << cpp_strerror(r) << ")"
+ << dendl;
+ if (ioc->allow_eio && is_expected_ioerr(r)) {
+ derr << __func__ << " translating the error to EIO for upper layer"
+ << dendl;
+ ioc->set_return_value(-EIO);
+ } else {
+ if (is_expected_ioerr(r)) {
+ note_io_error_event(
+ devname.c_str(),
+ path.c_str(),
+ r,
+#if defined(HAVE_POSIXAIO)
+ aio[i]->aio.aiocb.aio_lio_opcode,
+#else
+ aio[i]->iocb.aio_lio_opcode,
+#endif
+ aio[i]->offset,
+ aio[i]->length);
+ ceph_abort_msg(
+ "Unexpected IO error. "
+ "This may suggest a hardware issue. "
+ "Please check your kernel log!");
+ }
+ ceph_abort_msg(
+ "Unexpected IO error. "
+ "This may suggest HW issue. Please check your dmesg!");
+ }
+ } else if (aio[i]->length != (uint64_t)r) {
+ derr << "aio to 0x" << std::hex << aio[i]->offset
+ << "~" << aio[i]->length << std::dec
+ << " but returned: " << r << dendl;
+ ceph_abort_msg("unexpected aio return value: does not match length");
+ }
+
+ dout(10) << __func__ << " finished aio " << aio[i] << " r " << r
+ << " ioc " << ioc
+ << " with " << (ioc->num_running.load() - 1)
+ << " aios left" << dendl;
+
+ // NOTE: once num_running and we either call the callback or
+ // call aio_wake we cannot touch ioc or aio[] as the caller
+ // may free it.
+ if (ioc->priv) {
+ if (--ioc->num_running == 0) {
+ aio_callback(aio_callback_priv, ioc->priv);
+ }
+ } else {
+ ioc->try_aio_wake();
+ }
+ }
+ }
+ if (cct->_conf->bdev_debug_aio) {
+ utime_t now = ceph_clock_now();
+ std::lock_guard l(debug_queue_lock);
+ if (debug_oldest) {
+ if (debug_stall_since == utime_t()) {
+ debug_stall_since = now;
+ } else {
+ if (cct->_conf->bdev_debug_aio_suicide_timeout) {
+ utime_t cutoff = now;
+ cutoff -= cct->_conf->bdev_debug_aio_suicide_timeout;
+ if (debug_stall_since < cutoff) {
+ derr << __func__ << " stalled aio " << debug_oldest
+ << " since " << debug_stall_since << ", timeout is "
+ << cct->_conf->bdev_debug_aio_suicide_timeout
+ << "s, suicide" << dendl;
+ ceph_abort_msg("stalled aio... buggy kernel or bad device?");
+ }
+ }
+ }
+ }
+ }
+ reap_ioc();
+ if (cct->_conf->bdev_inject_crash) {
+ ++inject_crash_count;
+ if (inject_crash_count * cct->_conf->bdev_aio_poll_ms / 1000 >
+ cct->_conf->bdev_inject_crash + cct->_conf->bdev_inject_crash_flush_delay) {
+ derr << __func__ << " bdev_inject_crash trigger from aio thread"
+ << dendl;
+ cct->_log->flush();
+ _exit(1);
+ }
+ }
+ }
+ reap_ioc();
+ dout(10) << __func__ << " end" << dendl;
+}
+
+void HMSMRDevice::_discard_thread()
+{
+ std::unique_lock l(discard_lock);
+ ceph_assert(!discard_started);
+ discard_started = true;
+ discard_cond.notify_all();
+ while (true) {
+ ceph_assert(discard_finishing.empty());
+ if (discard_queued.empty()) {
+ if (discard_stop)
+ break;
+ dout(20) << __func__ << " sleep" << dendl;
+ discard_cond.notify_all(); // for the thread trying to drain...
+ discard_cond.wait(l);
+ dout(20) << __func__ << " wake" << dendl;
+ } else {
+ discard_finishing.swap(discard_queued);
+ discard_running = true;
+ l.unlock();
+ dout(20) << __func__ << " finishing" << dendl;
+ for (auto p = discard_finishing.begin();p != discard_finishing.end(); ++p) {
+ discard(p.get_start(), p.get_len());
+ }
+
+ discard_callback(discard_callback_priv, static_cast<void*>(&discard_finishing));
+ discard_finishing.clear();
+ l.lock();
+ discard_running = false;
+ }
+ }
+ dout(10) << __func__ << " finish" << dendl;
+ discard_started = false;
+}
+
+int HMSMRDevice::queue_discard(interval_set<uint64_t> &to_release)
+{
+ if (!support_discard)
+ return -1;
+
+ if (to_release.empty())
+ return 0;
+
+ std::lock_guard l(discard_lock);
+ discard_queued.insert(to_release);
+ discard_cond.notify_all();
+ return 0;
+}
+
+void HMSMRDevice::_aio_log_start(
+ IOContext *ioc,
+ uint64_t offset,
+ uint64_t length)
+{
+ dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length
+ << std::dec << dendl;
+ if (cct->_conf->bdev_debug_inflight_ios) {
+ std::lock_guard l(debug_lock);
+ if (debug_inflight.intersects(offset, length)) {
+ derr << __func__ << " inflight overlap of 0x"
+ << std::hex
+ << offset << "~" << length << std::dec
+ << " with " << debug_inflight << dendl;
+ ceph_abort();
+ }
+ debug_inflight.insert(offset, length);
+ }
+}
+
+void HMSMRDevice::debug_aio_link(aio_t& aio)
+{
+ if (debug_queue.empty()) {
+ debug_oldest = &aio;
+ }
+ debug_queue.push_back(aio);
+}
+
+void HMSMRDevice::debug_aio_unlink(aio_t& aio)
+{
+ if (aio.queue_item.is_linked()) {
+ debug_queue.erase(debug_queue.iterator_to(aio));
+ if (debug_oldest == &aio) {
+ auto age = cct->_conf->bdev_debug_aio_log_age;
+ if (age && debug_stall_since != utime_t()) {
+ utime_t cutoff = ceph_clock_now();
+ cutoff -= age;
+ if (debug_stall_since < cutoff) {
+ derr << __func__ << " stalled aio " << debug_oldest
+ << " since " << debug_stall_since << ", timeout is "
+ << age
+ << "s" << dendl;
+ }
+ }
+
+ if (debug_queue.empty()) {
+ debug_oldest = nullptr;
+ } else {
+ debug_oldest = &debug_queue.front();
+ }
+ debug_stall_since = utime_t();
+ }
+ }
+}
+
+void HMSMRDevice::_aio_log_finish(
+ IOContext *ioc,
+ uint64_t offset,
+ uint64_t length)
+{
+ dout(20) << __func__ << " " << aio << " 0x"
+ << std::hex << offset << "~" << length << std::dec << dendl;
+ if (cct->_conf->bdev_debug_inflight_ios) {
+ std::lock_guard l(debug_lock);
+ debug_inflight.erase(offset, length);
+ }
+}
+
+void HMSMRDevice::aio_submit(IOContext *ioc)
+{
+ dout(20) << __func__ << " ioc " << ioc
+ << " pending " << ioc->num_pending.load()
+ << " running " << ioc->num_running.load()
+ << dendl;
+
+ if (ioc->num_pending.load() == 0) {
+ return;
+ }
+
+ // move these aside, and get our end iterator position now, as the
+ // aios might complete as soon as they are submitted and queue more
+ // wal aio's.
+ list<aio_t>::iterator e = ioc->running_aios.begin();
+ ioc->running_aios.splice(e, ioc->pending_aios);
+
+ int pending = ioc->num_pending.load();
+ ioc->num_running += pending;
+ ioc->num_pending -= pending;
+ ceph_assert(ioc->num_pending.load() == 0); // we should be only thread doing this
+ ceph_assert(ioc->pending_aios.size() == 0);
+
+ if (cct->_conf->bdev_debug_aio) {
+ list<aio_t>::iterator p = ioc->running_aios.begin();
+ while (p != e) {
+ dout(30) << __func__ << " " << *p << dendl;
+ std::lock_guard l(debug_queue_lock);
+ debug_aio_link(*p++);
+ }
+ }
+
+ void *priv = static_cast<void*>(ioc);
+ int r, retries = 0;
+ r = io_queue->submit_batch(ioc->running_aios.begin(), e,
+ pending, priv, &retries);
+
+ if (retries)
+ derr << __func__ << " retries " << retries << dendl;
+ if (r < 0) {
+ derr << " aio submit got " << cpp_strerror(r) << dendl;
+ ceph_assert(r == 0);
+ }
+}
+
+int HMSMRDevice::_sync_write(uint64_t off, bufferlist &bl, bool buffered, int write_hint)
+{
+ uint64_t len = bl.length();
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len
+ << std::dec << (buffered ? " (buffered)" : " (direct)") << dendl;
+ if (cct->_conf->bdev_inject_crash &&
+ rand() % cct->_conf->bdev_inject_crash == 0) {
+ derr << __func__ << " bdev_inject_crash: dropping io 0x" << std::hex
+ << off << "~" << len << std::dec << dendl;
+ ++injecting_crash;
+ return 0;
+ }
+ vector<iovec> iov;
+ bl.prepare_iov(&iov);
+ int r = ::pwritev(choose_fd(buffered, write_hint),
+ &iov[0], iov.size(), off);
+
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " pwritev error: " << cpp_strerror(r) << dendl;
+ return r;
+ }
+#ifdef HAVE_SYNC_FILE_RANGE
+ if (buffered) {
+ // initiate IO and wait till it completes
+ r = ::sync_file_range(fd_buffereds[WRITE_LIFE_NOT_SET], off, len, SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER|SYNC_FILE_RANGE_WAIT_BEFORE);
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " sync_file_range error: " << cpp_strerror(r) << dendl;
+ return r;
+ }
+ }
+#endif
+
+ io_since_flush.store(true);
+
+ return 0;
+}
+
+int HMSMRDevice::write(
+ uint64_t off,
+ bufferlist &bl,
+ bool buffered,
+ int write_hint)
+{
+ uint64_t len = bl.length();
+ dout(20) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << (buffered ? " (buffered)" : " (direct)")
+ << dendl;
+ ceph_assert(is_valid_io(off, len));
+ if (cct->_conf->objectstore_blackhole) {
+ lderr(cct) << __func__ << " objectstore_blackhole=true, throwing out IO"
+ << dendl;
+ return 0;
+ }
+
+ if ((!buffered || bl.get_num_buffers() >= IOV_MAX) &&
+ bl.rebuild_aligned_size_and_memory(block_size, block_size, IOV_MAX)) {
+ dout(20) << __func__ << " rebuilding buffer to be aligned" << dendl;
+ }
+ dout(40) << "data: ";
+ bl.hexdump(*_dout);
+ *_dout << dendl;
+
+ return _sync_write(off, bl, buffered, write_hint);
+}
+
+int HMSMRDevice::aio_write(
+ uint64_t off,
+ bufferlist &bl,
+ IOContext *ioc,
+ bool buffered,
+ int write_hint)
+{
+ uint64_t len = bl.length();
+ dout(20) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << (buffered ? " (buffered)" : " (direct)")
+ << dendl;
+ ceph_assert(is_valid_io(off, len));
+ if (cct->_conf->objectstore_blackhole) {
+ lderr(cct) << __func__ << " objectstore_blackhole=true, throwing out IO"
+ << dendl;
+ return 0;
+ }
+
+ if ((!buffered || bl.get_num_buffers() >= IOV_MAX) &&
+ bl.rebuild_aligned_size_and_memory(block_size, block_size, IOV_MAX)) {
+ dout(20) << __func__ << " rebuilding buffer to be aligned" << dendl;
+ }
+ dout(40) << "data: ";
+ bl.hexdump(*_dout);
+ *_dout << dendl;
+
+ _aio_log_start(ioc, off, len);
+
+#ifdef HAVE_LIBAIO
+ if (aio && dio && !buffered) {
+ if (cct->_conf->bdev_inject_crash &&
+ rand() % cct->_conf->bdev_inject_crash == 0) {
+ derr << __func__ << " bdev_inject_crash: dropping io 0x" << std::hex
+ << off << "~" << len << std::dec
+ << dendl;
+ // generate a real io so that aio_wait behaves properly, but make it
+ // a read instead of write, and toss the result.
+ ioc->pending_aios.push_back(aio_t(ioc, choose_fd(false, write_hint)));
+ ++ioc->num_pending;
+ auto& aio = ioc->pending_aios.back();
+ bufferptr p = buffer::create_small_page_aligned(len);
+ aio.bl.append(std::move(p));
+ aio.bl.prepare_iov(&aio.iov);
+ aio.preadv(off, len);
+ ++injecting_crash;
+ } else {
+ if (bl.length() <= RW_IO_MAX) {
+ // fast path (non-huge write)
+ ioc->pending_aios.push_back(aio_t(ioc, choose_fd(false, write_hint)));
+ ++ioc->num_pending;
+ auto& aio = ioc->pending_aios.back();
+ bl.prepare_iov(&aio.iov);
+ aio.bl.claim_append(bl);
+ aio.pwritev(off, len);
+ dout(30) << aio << dendl;
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len
+ << std::dec << " aio " << &aio << dendl;
+ } else {
+ // write in RW_IO_MAX-sized chunks
+ uint64_t prev_len = 0;
+ while (prev_len < bl.length()) {
+ bufferlist tmp;
+ if (prev_len + RW_IO_MAX < bl.length()) {
+ tmp.substr_of(bl, prev_len, RW_IO_MAX);
+ } else {
+ tmp.substr_of(bl, prev_len, bl.length() - prev_len);
+ }
+ auto len = tmp.length();
+ ioc->pending_aios.push_back(aio_t(ioc, choose_fd(false, write_hint)));
+ ++ioc->num_pending;
+ auto& aio = ioc->pending_aios.back();
+ tmp.prepare_iov(&aio.iov);
+ aio.bl.claim_append(tmp);
+ aio.pwritev(off + prev_len, len);
+ dout(30) << aio << dendl;
+ dout(5) << __func__ << " 0x" << std::hex << off + prev_len
+ << "~" << len
+ << std::dec << " aio " << &aio << " (piece)" << dendl;
+ prev_len += len;
+ }
+ }
+ }
+ } else
+#endif
+ {
+ int r = _sync_write(off, bl, buffered, write_hint);
+ _aio_log_finish(ioc, off, len);
+ if (r < 0)
+ return r;
+ }
+ return 0;
+}
+
+int HMSMRDevice::discard(uint64_t offset, uint64_t len)
+{
+ int r = 0;
+ if (cct->_conf->objectstore_blackhole) {
+ lderr(cct) << __func__ << " objectstore_blackhole=true, throwing out IO"
+ << dendl;
+ return 0;
+ }
+ if (support_discard) {
+ dout(10) << __func__
+ << " 0x" << std::hex << offset << "~" << len << std::dec
+ << dendl;
+
+ r = BlkDev{fd_directs[WRITE_LIFE_NOT_SET]}.discard((int64_t)offset, (int64_t)len);
+ }
+ return r;
+}
+
+int HMSMRDevice::read(uint64_t off, uint64_t len, bufferlist *pbl,
+ IOContext *ioc,
+ bool buffered)
+{
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << (buffered ? " (buffered)" : " (direct)")
+ << dendl;
+ ceph_assert(is_valid_io(off, len));
+
+ _aio_log_start(ioc, off, len);
+
+ auto start1 = mono_clock::now();
+
+ auto p = buffer::ptr_node::create(buffer::create_small_page_aligned(len));
+ int r = ::pread(buffered ? fd_buffereds[WRITE_LIFE_NOT_SET] : fd_directs[WRITE_LIFE_NOT_SET],
+ p->c_str(), len, off);
+ auto age = cct->_conf->bdev_debug_aio_log_age;
+ if (mono_clock::now() - start1 >= make_timespan(age)) {
+ derr << __func__ << " stalled read "
+ << " 0x" << std::hex << off << "~" << len << std::dec
+ << (buffered ? " (buffered)" : " (direct)")
+ << " since " << start1 << ", timeout is "
+ << age
+ << "s" << dendl;
+ }
+
+ if (r < 0) {
+ if (ioc->allow_eio && is_expected_ioerr(r)) {
+ r = -EIO;
+ } else {
+ r = -errno;
+ }
+ goto out;
+ }
+ ceph_assert((uint64_t)r == len);
+ pbl->push_back(std::move(p));
+
+ dout(40) << "data: ";
+ pbl->hexdump(*_dout);
+ *_dout << dendl;
+
+ out:
+ _aio_log_finish(ioc, off, len);
+ return r < 0 ? r : 0;
+}
+
+int HMSMRDevice::aio_read(
+ uint64_t off,
+ uint64_t len,
+ bufferlist *pbl,
+ IOContext *ioc)
+{
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << dendl;
+
+ int r = 0;
+#ifdef HAVE_LIBAIO
+ if (aio && dio) {
+ ceph_assert(is_valid_io(off, len));
+ _aio_log_start(ioc, off, len);
+ ioc->pending_aios.push_back(aio_t(ioc, fd_directs[WRITE_LIFE_NOT_SET]));
+ ++ioc->num_pending;
+ aio_t& aio = ioc->pending_aios.back();
+ bufferptr p = buffer::create_small_page_aligned(len);
+ aio.bl.append(std::move(p));
+ aio.bl.prepare_iov(&aio.iov);
+ aio.preadv(off, len);
+ dout(30) << aio << dendl;
+ pbl->append(aio.bl);
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len
+ << std::dec << " aio " << &aio << dendl;
+ } else
+#endif
+ {
+ r = read(off, len, pbl, ioc, false);
+ }
+
+ return r;
+}
+
+int HMSMRDevice::direct_read_unaligned(uint64_t off, uint64_t len, char *buf)
+{
+ uint64_t aligned_off = p2align(off, block_size);
+ uint64_t aligned_len = p2roundup(off+len, block_size) - aligned_off;
+ bufferptr p = buffer::create_small_page_aligned(aligned_len);
+ int r = 0;
+
+ auto start1 = mono_clock::now();
+ r = ::pread(fd_directs[WRITE_LIFE_NOT_SET], p.c_str(), aligned_len, aligned_off);
+ auto age = cct->_conf->bdev_debug_aio_log_age;
+ if (mono_clock::now() - start1 >= make_timespan(age)) {
+ derr << __func__ << " stalled read "
+ << " 0x" << std::hex << off << "~" << len << std::dec
+ << " since " << start1 << ", timeout is "
+ << age
+ << "s" << dendl;
+ }
+
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << " error: " << cpp_strerror(r) << dendl;
+ goto out;
+ }
+ ceph_assert((uint64_t)r == aligned_len);
+ memcpy(buf, p.c_str() + (off - aligned_off), len);
+
+ dout(40) << __func__ << " data: ";
+ bufferlist bl;
+ bl.append(buf, len);
+ bl.hexdump(*_dout);
+ *_dout << dendl;
+
+ out:
+ return r < 0 ? r : 0;
+}
+
+int HMSMRDevice::read_random(uint64_t off, uint64_t len, char *buf,
+ bool buffered)
+{
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << "buffered " << buffered
+ << dendl;
+ ceph_assert(len > 0);
+ ceph_assert(off < size);
+ ceph_assert(off + len <= size);
+ int r = 0;
+ auto age = cct->_conf->bdev_debug_aio_log_age;
+
+ //if it's direct io and unaligned, we have to use a internal buffer
+ if (!buffered && ((off % block_size != 0)
+ || (len % block_size != 0)
+ || (uintptr_t(buf) % CEPH_PAGE_SIZE != 0)))
+ return direct_read_unaligned(off, len, buf);
+
+ auto start1 = mono_clock::now();
+ if (buffered) {
+ //buffered read
+ auto off0 = off;
+ char *t = buf;
+ uint64_t left = len;
+ while (left > 0) {
+ r = ::pread(fd_buffereds[WRITE_LIFE_NOT_SET], t, left, off);
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " 0x" << std::hex << off << "~" << left
+ << std::dec << " error: " << cpp_strerror(r) << dendl;
+ goto out;
+ }
+ off += r;
+ t += r;
+ left -= r;
+ }
+ if (mono_clock::now() - start1 >= make_timespan(age)) {
+ derr << __func__ << " stalled read "
+ << " 0x" << std::hex << off0 << "~" << len << std::dec
+ << " (buffered) since " << start1 << ", timeout is "
+ << age
+ << "s" << dendl;
+ }
+ } else {
+ //direct and aligned read
+ r = ::pread(fd_directs[WRITE_LIFE_NOT_SET], buf, len, off);
+ if (mono_clock::now() - start1 >= make_timespan(age)) {
+ derr << __func__ << " stalled read "
+ << " 0x" << std::hex << off << "~" << len << std::dec
+ << " (direct) since " << start1 << ", timeout is "
+ << age
+ << "s" << dendl;
+ }
+ if (r < 0) {
+ r = -errno;
+ derr << __func__ << " direct_aligned_read" << " 0x" << std::hex
+ << off << "~" << left << std::dec << " error: " << cpp_strerror(r)
+ << dendl;
+ goto out;
+ }
+ ceph_assert((uint64_t)r == len);
+ }
+
+ dout(40) << __func__ << " data: ";
+ bufferlist bl;
+ bl.append(buf, len);
+ bl.hexdump(*_dout);
+ *_dout << dendl;
+
+ out:
+ return r < 0 ? r : 0;
+}
+
+int HMSMRDevice::invalidate_cache(uint64_t off, uint64_t len)
+{
+ dout(5) << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << dendl;
+ ceph_assert(off % block_size == 0);
+ ceph_assert(len % block_size == 0);
+ int r = posix_fadvise(fd_buffereds[WRITE_LIFE_NOT_SET], off, len, POSIX_FADV_DONTNEED);
+ if (r) {
+ r = -r;
+ derr << __func__ << " 0x" << std::hex << off << "~" << len << std::dec
+ << " error: " << cpp_strerror(r) << dendl;
+ }
+ return r;
+}
projects / ceph.git / blobdiff