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// -*- 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 "HMSMRDevice.h"
extern "C" {
#include <libzbd/zbd.h>
}
#include "common/debug.h"
#include "common/errno.h"
#define dout_context cct
#define dout_subsys ceph_subsys_bdev
#undef dout_prefix
#define dout_prefix *_dout << "smrbdev(" << this << " " << path << ") "
using namespace std;
HMSMRDevice::HMSMRDevice(CephContext* cct,
aio_callback_t cb,
void *cbpriv,
aio_callback_t d_cb,
void *d_cbpriv)
: KernelDevice(cct, cb, cbpriv, d_cb, d_cbpriv)
{
}
bool HMSMRDevice::support(const std::string& path)
{
return zbd_device_is_zoned(path.c_str()) == 1;
}
int HMSMRDevice::_post_open()
{
dout(10) << __func__ << dendl;
zbd_fd = zbd_open(path.c_str(), O_RDWR | O_DIRECT | O_LARGEFILE, nullptr);
int r;
if (zbd_fd < 0) {
r = errno;
derr << __func__ << " zbd_open failed on " << path << ": "
<< cpp_strerror(r) << dendl;
return -r;
}
unsigned int nr_zones = 0;
std::vector<zbd_zone> zones;
if (zbd_report_nr_zones(zbd_fd, 0, 0, ZBD_RO_NOT_WP, &nr_zones) != 0) {
r = -errno;
derr << __func__ << " zbd_report_nr_zones failed on " << path << ": "
<< cpp_strerror(r) << dendl;
goto fail;
}
zones.resize(nr_zones);
if (zbd_report_zones(zbd_fd, 0, 0, ZBD_RO_NOT_WP, zones.data(), &nr_zones) != 0) {
r = -errno;
derr << __func__ << " zbd_report_zones failed on " << path << dendl;
goto fail;
}
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 0;
fail:
zbd_close(zbd_fd);
zbd_fd = -1;
return r;
}
void HMSMRDevice::_pre_close()
{
if (zbd_fd >= 0) {
zbd_close(zbd_fd);
zbd_fd = -1;
}
}
void HMSMRDevice::reset_all_zones()
{
dout(10) << __func__ << dendl;
zbd_reset_zones(zbd_fd, conventional_region_size, 0);
}
void HMSMRDevice::reset_zone(uint64_t zone)
{
dout(10) << __func__ << " zone 0x" << std::hex << zone << std::dec << dendl;
if (zbd_reset_zones(zbd_fd, zone * zone_size, zone_size) != 0) {
derr << __func__ << " resetting zone failed for zone 0x" << std::hex
<< zone << std::dec << dendl;
ceph_abort("zbd_reset_zones failed");
}
}
std::vector<uint64_t> HMSMRDevice::get_zones()
{
std::vector<zbd_zone> zones;
unsigned int num_zones = size / zone_size;
zones.resize(num_zones);
int r = zbd_report_zones(zbd_fd, 0, 0, ZBD_RO_ALL, zones.data(), &num_zones);
if (r != 0) {
derr << __func__ << " zbd_report_zones failed on " << path << ": "
<< cpp_strerror(errno) << dendl;
ceph_abort("zbd_report_zones failed");
}
std::vector<uint64_t> wp(num_zones);
for (unsigned i = 0; i < num_zones; ++i) {
wp[i] = zones[i].wp;
}
return wp;
}
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