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-rw-r--r--src/extblkdev/vdo/CMakeLists.txt9
-rw-r--r--src/extblkdev/vdo/ExtBlkDevPluginVdo.cc59
-rw-r--r--src/extblkdev/vdo/ExtBlkDevPluginVdo.h34
-rw-r--r--src/extblkdev/vdo/ExtBlkDevVdo.cc156
-rw-r--r--src/extblkdev/vdo/ExtBlkDevVdo.h52
5 files changed, 310 insertions, 0 deletions
diff --git a/src/extblkdev/vdo/CMakeLists.txt b/src/extblkdev/vdo/CMakeLists.txt
new file mode 100644
index 000000000..60d4f293d
--- /dev/null
+++ b/src/extblkdev/vdo/CMakeLists.txt
@@ -0,0 +1,9 @@
+# vdo plugin
+
+set(vdo_srcs
+ ExtBlkDevPluginVdo.cc
+ ExtBlkDevVdo.cc
+)
+
+add_library(ceph_ebd_vdo SHARED ${vdo_srcs})
+install(TARGETS ceph_ebd_vdo DESTINATION ${extblkdev_plugin_dir})
diff --git a/src/extblkdev/vdo/ExtBlkDevPluginVdo.cc b/src/extblkdev/vdo/ExtBlkDevPluginVdo.cc
new file mode 100644
index 000000000..dbe156182
--- /dev/null
+++ b/src/extblkdev/vdo/ExtBlkDevPluginVdo.cc
@@ -0,0 +1,59 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * (C) Copyright IBM Corporation 2022
+ * Author: Martin Ohmacht <mohmacht@us.ibm.com>
+ *
+ * Based on the file src/erasure-code/clay/ErasureCodePluginClay.cc
+ * Copyright (C) 2018 Indian Institute of Science <office.ece@iisc.ac.in>
+ *
+ * Author: Myna Vajha <mynaramana@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#include "ceph_ver.h"
+#include "ExtBlkDevPluginVdo.h"
+#include "common/ceph_context.h"
+
+
+// This plugin does not require any capabilities to be set
+int ExtBlkDevPluginVdo::get_required_cap_set(cap_t caps)
+{
+ return 0;
+}
+
+
+int ExtBlkDevPluginVdo::factory(const std::string& logdevname,
+ ceph::ExtBlkDevInterfaceRef& ext_blk_dev)
+{
+ auto vdo = new ExtBlkDevVdo(cct);
+ int r = vdo->init(logdevname);
+ if (r != 0) {
+ delete vdo;
+ return r;
+ }
+ ext_blk_dev.reset(vdo);
+ return 0;
+};
+
+const char *__ceph_plugin_version() { return CEPH_GIT_NICE_VER; }
+
+int __ceph_plugin_init(CephContext *cct,
+ const std::string& type,
+ const std::string& name)
+{
+ auto plg = new ExtBlkDevPluginVdo(cct);
+ if(plg == 0) return -ENOMEM;
+ int rc = cct->get_plugin_registry()->add(type, name, plg);
+ if(rc != 0){
+ delete plg;
+ }
+ return rc;
+}
diff --git a/src/extblkdev/vdo/ExtBlkDevPluginVdo.h b/src/extblkdev/vdo/ExtBlkDevPluginVdo.h
new file mode 100644
index 000000000..784f642ec
--- /dev/null
+++ b/src/extblkdev/vdo/ExtBlkDevPluginVdo.h
@@ -0,0 +1,34 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * (C) Copyright IBM Corporation 2022
+ * Author: Martin Ohmacht <mohmacht@us.ibm.com>
+ *
+ * Based on the file src/erasure-code/clay/ErasureCodePluginClay.h
+ * Copyright (C) 2018 Indian Institute of Science <office.ece@iisc.ac.in>
+ *
+ * Author: Myna Vajha <mynaramana@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#ifndef CEPH_EXT_BLK_DEV_PLUGIN_VDO_H
+#define CEPH_EXT_BLK_DEV_PLUGIN_VDO_H
+
+#include "ExtBlkDevVdo.h"
+
+class ExtBlkDevPluginVdo : public ceph::ExtBlkDevPlugin {
+public:
+ explicit ExtBlkDevPluginVdo(CephContext *cct) : ExtBlkDevPlugin(cct) {}
+ int get_required_cap_set(cap_t caps) override;
+ int factory(const std::string& logdevname,
+ ceph::ExtBlkDevInterfaceRef& ext_blk_dev) override;
+};
+
+#endif
diff --git a/src/extblkdev/vdo/ExtBlkDevVdo.cc b/src/extblkdev/vdo/ExtBlkDevVdo.cc
new file mode 100644
index 000000000..c40cd1a1a
--- /dev/null
+++ b/src/extblkdev/vdo/ExtBlkDevVdo.cc
@@ -0,0 +1,156 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * (C) Copyright IBM Corporation 2022
+ * Author: Martin Ohmacht <mohmacht@us.ibm.com>
+ *
+ * Based on the file ceph/src/common/blkdev.cc
+ * Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
+ *
+ * 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 "ExtBlkDevVdo.h"
+#include "common/blkdev.h"
+#include "include/stringify.h"
+#include <errno.h>
+#include "common/debug.h"
+
+#define dout_subsys ceph_subsys_bdev
+#define dout_context cct
+#undef dout_prefix
+#define dout_prefix *_dout << "vdo(" << this << ") "
+
+
+int ExtBlkDevVdo::_get_vdo_stats_handle(const std::string& devname)
+{
+ int rc = -ENOENT;
+ dout(10) << __func__ << " VDO init checking device: " << devname << dendl;
+
+ // we need to go from the raw devname (e.g., dm-4) to the VDO volume name.
+ // currently the best way seems to be to look at /dev/mapper/* ...
+ std::string expect = std::string("../") + devname; // expected symlink target
+ DIR *dir = ::opendir("/dev/mapper");
+ if (!dir) {
+ return -errno;
+ }
+ struct dirent *de = nullptr;
+ while ((de = ::readdir(dir))) {
+ if (de->d_name[0] == '.')
+ continue;
+ char fn[4096], target[4096];
+ snprintf(fn, sizeof(fn), "/dev/mapper/%s", de->d_name);
+ int r = readlink(fn, target, sizeof(target));
+ if (r < 0 || r >= (int)sizeof(target))
+ continue;
+ target[r] = 0;
+ if (expect == target) {
+ snprintf(fn, sizeof(fn), "/sys/kvdo/%s/statistics", de->d_name);
+ int vdo_fd = ::open(fn, O_RDONLY|O_CLOEXEC);
+ if (vdo_fd >= 0) {
+ name = de->d_name;
+ vdo_dir_fd = vdo_fd;
+ rc = 0;
+ break;
+ }
+ }
+ }
+ closedir(dir);
+ return rc;
+}
+
+int ExtBlkDevVdo::get_vdo_stats_handle()
+{
+ std::set<std::string> devs = { logdevname };
+ while (!devs.empty()) {
+ std::string dev = *devs.begin();
+ devs.erase(devs.begin());
+ int rc = _get_vdo_stats_handle(dev);
+ if (rc == 0) {
+ // yay, it's vdo
+ return rc;
+ }
+ // ok, see if there are constituent devices
+ if (dev.find("dm-") == 0) {
+ get_dm_parents(dev, &devs);
+ }
+ }
+ return -ENOENT;
+}
+
+int64_t ExtBlkDevVdo::get_vdo_stat(const char *property)
+{
+ int64_t ret = 0;
+ int fd = ::openat(vdo_dir_fd, property, O_RDONLY|O_CLOEXEC);
+ if (fd < 0) {
+ return 0;
+ }
+ char buf[1024];
+ int r = ::read(fd, buf, sizeof(buf) - 1);
+ if (r > 0) {
+ buf[r] = 0;
+ ret = atoll(buf);
+ }
+ VOID_TEMP_FAILURE_RETRY(::close(fd));
+ return ret;
+}
+
+
+int ExtBlkDevVdo::init(const std::string& alogdevname)
+{
+ logdevname = alogdevname;
+ // get directory handle for VDO metadata
+ return get_vdo_stats_handle();
+}
+
+
+int ExtBlkDevVdo::get_state(ceph::ExtBlkDevState& state)
+{
+ int64_t block_size = get_vdo_stat("block_size");
+ int64_t physical_blocks = get_vdo_stat("physical_blocks");
+ int64_t overhead_blocks_used = get_vdo_stat("overhead_blocks_used");
+ int64_t data_blocks_used = get_vdo_stat("data_blocks_used");
+ int64_t logical_blocks = get_vdo_stat("logical_blocks");
+ int64_t logical_blocks_used = get_vdo_stat("logical_blocks_used");
+ if (!block_size
+ || !physical_blocks
+ || !overhead_blocks_used
+ || !data_blocks_used
+ || !logical_blocks) {
+ dout(1) << __func__ << " VDO sysfs provided zero value for at least one statistic: " << dendl;
+ dout(1) << __func__ << " VDO block_size: " << block_size << dendl;
+ dout(1) << __func__ << " VDO physical_blocks: " << physical_blocks << dendl;
+ dout(1) << __func__ << " VDO overhead_blocks_used: " << overhead_blocks_used << dendl;
+ dout(1) << __func__ << " VDO data_blocks_used: " << data_blocks_used << dendl;
+ dout(1) << __func__ << " VDO logical_blocks: " << logical_blocks << dendl;
+ return -1;
+ }
+ int64_t avail_blocks =
+ physical_blocks - overhead_blocks_used - data_blocks_used;
+ int64_t logical_avail_blocks =
+ logical_blocks - logical_blocks_used;
+ state.set_logical_total(block_size * logical_blocks);
+ state.set_logical_avail(block_size * logical_avail_blocks);
+ state.set_physical_total(block_size * physical_blocks);
+ state.set_physical_avail(block_size * avail_blocks);
+ return 0;
+}
+
+int ExtBlkDevVdo::collect_metadata(const std::string& prefix, std::map<std::string,std::string> *pm)
+{
+ ceph::ExtBlkDevState state;
+ int rc = get_state(state);
+ if(rc != 0){
+ return rc;
+ }
+ (*pm)[prefix + "vdo"] = "true";
+ (*pm)[prefix + "vdo_physical_size"] = stringify(state.get_physical_total());
+ return 0;
+}
diff --git a/src/extblkdev/vdo/ExtBlkDevVdo.h b/src/extblkdev/vdo/ExtBlkDevVdo.h
new file mode 100644
index 000000000..09865a27e
--- /dev/null
+++ b/src/extblkdev/vdo/ExtBlkDevVdo.h
@@ -0,0 +1,52 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * (C) Copyright IBM Corporation 2022
+ * Author: Martin Ohmacht <mohmacht@us.ibm.com>
+ *
+ * Based on the file ceph/src/common/blkdev.cc
+ * Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
+ *
+ * And also based on the file src/erasure-code/clay/ErasureCodeClay.h
+ * Copyright (C) 2018 Indian Institute of Science <office.ece@iisc.ac.in>
+ *
+ * Author: Myna Vajha <mynaramana@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.
+ *
+ */
+
+#ifndef CEPH_EXT_BLK_DEV_VDO_H
+#define CEPH_EXT_BLK_DEV_VDO_H
+
+#include "extblkdev/ExtBlkDevInterface.h"
+#include "include/compat.h"
+
+class ExtBlkDevVdo final : public ceph::ExtBlkDevInterface
+{
+ int vdo_dir_fd = -1; ///< fd for vdo sysfs directory
+ std::string name; // name of the underlying vdo device
+ std::string logdevname; // name of the top level logical device
+ CephContext *cct;
+public:
+ explicit ExtBlkDevVdo(CephContext *cct) : cct(cct) {}
+ ~ExtBlkDevVdo(){
+ if(vdo_dir_fd >= 0)
+ VOID_TEMP_FAILURE_RETRY(::close(vdo_dir_fd));
+ }
+ int _get_vdo_stats_handle(const std::string& devname);
+ int get_vdo_stats_handle();
+ int64_t get_vdo_stat(const char *property);
+ virtual int init(const std::string& logdevname);
+ virtual const std::string& get_devname() const {return name;}
+ virtual int get_state(ceph::ExtBlkDevState& state);
+ virtual int collect_metadata(const std::string& prefix, std::map<std::string,std::string> *pm);
+};
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 01:05:41 +0000