Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 291 insertions, 0 deletions

diff --git a/src/crush/CrushTreeDumper.h b/src/crush/CrushTreeDumper.h
new file mode 100644
index 000000000..a10c0f2c1
--- /dev/null
+++ b/src/crush/CrushTreeDumper.h
@@ -0,0 +1,291 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * Copyright (C) 2015 Mirantis Inc
+ *
+ * Author: Mykola Golub <mgolub@mirantis.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 CRUSH_TREE_DUMPER_H
+#define CRUSH_TREE_DUMPER_H
+
+#include "CrushWrapper.h"
+#include "include/stringify.h"
+
+/**
+ * CrushTreeDumper:
+ * A helper class and functions to dump a crush tree.
+ *
+ * Example:
+ *
+ *  class SimpleDumper : public CrushTreeDumper::Dumper<ostream> {
+ *  public:
+ *    SimpleDumper(const CrushWrapper *crush) :
+ *      CrushTreeDumper::Dumper<ostream>(crush) {}
+ *  protected:
+ *    virtual void dump_item(const CrushTreeDumper::Item &qi, ostream *out) {
+ *      *out << qi.id;
+ *      for (int k = 0; k < qi.depth; k++)
+ *        *out << "-";
+ *      if (qi.is_bucket())
+ *        *out << crush->get_item_name(qi.id)
+ *      else
+ *        *out << "osd." << qi.id;
+ *      *out << "\n";
+ *    }
+ *  };
+ *
+ *  SimpleDumper(crush).dump(out);
+ *
+ */
+
+namespace CrushTreeDumper {
+
+  struct Item {
+    int id;
+    int parent;
+    int depth;
+    float weight;
+    std::list<int> children;
+
+    Item() : id(0), parent(0), depth(0), weight(0) {}
+    Item(int i, int p, int d, float w) : id(i), parent(p), depth(d), weight(w) {}
+
+    bool is_bucket() const { return id < 0; }
+  };
+
+  template <typename F>
+  class Dumper : public std::list<Item> {
+  public:
+    explicit Dumper(const CrushWrapper *crush_,
+		    const name_map_t& weight_set_names_)
+      : crush(crush_), weight_set_names(weight_set_names_) {
+      crush->find_nonshadow_roots(&roots);
+      root = roots.begin();
+    }
+    explicit Dumper(const CrushWrapper *crush_,
+                    const name_map_t& weight_set_names_,
+                    bool show_shadow)
+      : crush(crush_), weight_set_names(weight_set_names_) {
+      if (show_shadow) {
+        crush->find_roots(&roots);
+      } else {
+        crush->find_nonshadow_roots(&roots);
+      }
+      root = roots.begin();
+    }
+
+    virtual ~Dumper() {}
+
+    virtual void reset() {
+      root = roots.begin();
+      touched.clear();
+      clear();
+    }
+
+    virtual bool should_dump_leaf(int i) const {
+      return true;
+    }
+    virtual bool should_dump_empty_bucket() const {
+      return true;
+    }
+
+    bool should_dump(int id) {
+      if (id >= 0)
+	return should_dump_leaf(id);
+      if (should_dump_empty_bucket())
+	return true;
+      int s = crush->get_bucket_size(id);
+      for (int k = s - 1; k >= 0; k--) {
+	int c = crush->get_bucket_item(id, k);
+	if (should_dump(c))
+	  return true;
+      }
+      return false;
+    }
+
+    bool next(Item &qi) {
+      if (empty()) {
+	while (root != roots.end() && !should_dump(*root))
+	  ++root;
+	if (root == roots.end())
+	  return false;
+	push_back(Item(*root, 0, 0, crush->get_bucket_weightf(*root)));
+	++root;
+      }
+
+      qi = front();
+      pop_front();
+      touched.insert(qi.id);
+
+      if (qi.is_bucket()) {
+	// queue bucket contents, sorted by (class, name)
+	int s = crush->get_bucket_size(qi.id);
+	std::map<std::string, std::pair<int,float>> sorted;
+	for (int k = s - 1; k >= 0; k--) {
+	  int id = crush->get_bucket_item(qi.id, k);
+	  if (should_dump(id)) {
+	    std::string sort_by;
+	    if (id >= 0) {
+	      const char *c = crush->get_item_class(id);
+	      sort_by = c ? c : "";
+	      sort_by += "_";
+	      char nn[80];
+	      snprintf(nn, sizeof(nn), "osd.%08d", id);
+	      sort_by += nn;
+	    } else {
+	      sort_by = "_";
+	      sort_by += crush->get_item_name(id);
+	    }
+	    sorted[sort_by] = std::make_pair(
+	      id, crush->get_bucket_item_weightf(qi.id, k));
+	  }
+	}
+	for (auto p = sorted.rbegin(); p != sorted.rend(); ++p) {
+	  qi.children.push_back(p->second.first);
+	  push_front(Item(p->second.first, qi.id, qi.depth + 1,
+			  p->second.second));
+	}
+      }
+      return true;
+    }
+
+    void dump(F *f) {
+      reset();
+      Item qi;
+      while (next(qi))
+	dump_item(qi, f);
+    }
+
+    bool is_touched(int id) const { return touched.count(id) > 0; }
+
+    void set_root(const std::string& bucket) {
+      roots.clear();
+      if (crush->name_exists(bucket)) {
+	int i = crush->get_item_id(bucket);
+	roots.insert(i);
+      }
+    }
+
+  protected:
+    virtual void dump_item(const Item &qi, F *f) = 0;
+
+  protected:
+    const CrushWrapper *crush;
+    const name_map_t &weight_set_names;
+
+  private:
+    std::set<int> touched;
+    std::set<int> roots;
+    std::set<int>::iterator root;
+  };
+
+  inline void dump_item_fields(const CrushWrapper *crush,
+			       const name_map_t& weight_set_names,
+			       const Item &qi, ceph::Formatter *f) {
+    f->dump_int("id", qi.id);
+    const char *c = crush->get_item_class(qi.id);
+    if (c)
+      f->dump_string("device_class", c);
+    if (qi.is_bucket()) {
+      int type = crush->get_bucket_type(qi.id);
+      f->dump_string("name", crush->get_item_name(qi.id));
+      f->dump_string("type", crush->get_type_name(type));
+      f->dump_int("type_id", type);
+    } else {
+      f->dump_stream("name") << "osd." << qi.id;
+      f->dump_string("type", crush->get_type_name(0));
+      f->dump_int("type_id", 0);
+      f->dump_float("crush_weight", qi.weight);
+      f->dump_unsigned("depth", qi.depth);
+    }
+    if (qi.parent < 0) {
+      f->open_object_section("pool_weights");
+      for (auto& p : crush->choose_args) {
+	const crush_choose_arg_map& cmap = p.second;
+	int bidx = -1 - qi.parent;
+	const crush_bucket *b = crush->get_bucket(qi.parent);
+	if (b &&
+	    bidx < (int)cmap.size &&
+	    cmap.args[bidx].weight_set &&
+	    cmap.args[bidx].weight_set_positions >= 1) {
+	  int bpos;
+	  for (bpos = 0;
+	       bpos < (int)cmap.args[bidx].weight_set[0].size &&
+		 b->items[bpos] != qi.id;
+	       ++bpos) ;
+	  std::string name;
+	  if (p.first == CrushWrapper::DEFAULT_CHOOSE_ARGS) {
+	    name = "(compat)";
+	  } else {
+	    auto q = weight_set_names.find(p.first);
+	    name = q != weight_set_names.end() ? q->second :
+	      stringify(p.first);
+	  }
+	  f->open_array_section(name.c_str());
+	  for (unsigned opos = 0;
+	       opos < cmap.args[bidx].weight_set_positions;
+	       ++opos) {
+	    float w = (float)cmap.args[bidx].weight_set[opos].weights[bpos] /
+	      (float)0x10000;
+	    f->dump_float("weight", w);
+	  }
+	  f->close_section();
+	}
+      }
+      f->close_section();
+    }
+  }
+
+  inline void dump_bucket_children(const CrushWrapper *crush,
+				   const Item &qi, ceph::Formatter *f) {
+    if (!qi.is_bucket())
+      return;
+
+    f->open_array_section("children");
+    for (std::list<int>::const_iterator i = qi.children.begin();
+	 i != qi.children.end();
+	 ++i) {
+      f->dump_int("child", *i);
+    }
+    f->close_section();
+  }
+
+  class FormattingDumper : public Dumper<ceph::Formatter> {
+  public:
+    explicit FormattingDumper(const CrushWrapper *crush,
+			      const name_map_t& weight_set_names)
+      : Dumper<ceph::Formatter>(crush, weight_set_names) {}
+    explicit FormattingDumper(const CrushWrapper *crush,
+                              const name_map_t& weight_set_names,
+                              bool show_shadow)
+      : Dumper<ceph::Formatter>(crush, weight_set_names, show_shadow) {}
+
+  protected:
+    void dump_item(const Item &qi, ceph::Formatter *f) override {
+      f->open_object_section("item");
+      dump_item_fields(qi, f);
+      dump_bucket_children(qi, f);
+      f->close_section();
+    }
+
+    virtual void dump_item_fields(const Item &qi, ceph::Formatter *f) {
+      CrushTreeDumper::dump_item_fields(crush, weight_set_names, qi, f);
+    }
+
+    virtual void dump_bucket_children(const Item &qi, ceph::Formatter *f) {
+      CrushTreeDumper::dump_bucket_children(crush, qi, f);
+    }
+  };
+
+}
+
+#endif