19741624072

Committed 27 Nov 2025 03:45PM UTC coverage: 73.086% (+0.02%) from 73.065%

Build # 19741624072

Build Type

Pull #16570

github

Committed by

web-flow

Commit Message

Merge 08a2cdb1d into f94a3f63f

Pull Request Pull Request #16570: rec: rewrite all unwrap calls in web.rs

Run Details

38523 of 63408 branches covered (60.75%)

Branch coverage included in aggregate %.

128044 of 164496 relevant lines covered (77.84%)

6531485.83 hits per line

Source File
Press 'n' to go to next uncovered line, 'b' for previous

77.78

/pdns/dnsdistdist/dnsdist-lbpolicies.hh

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#pragma once

#include <memory>
#include <optional>

struct dnsdist_ffi_servers_list_t;
struct dnsdist_ffi_server_t;
struct dnsdist_ffi_dnsquestion_t;

struct DNSQuestion;
struct DownstreamState;

struct PerThreadPoliciesState;

class ServerPolicy
{
public:
  using SelectedServerPosition = unsigned int;
  template <class T>
  using Numbered = std::pair<unsigned int, T>;
  using NumberedServer = Numbered<std::shared_ptr<DownstreamState>>;
  template <class T>
  using NumberedVector = std::vector<std::pair<unsigned int, T>>;
  using NumberedServerVector = NumberedVector<std::shared_ptr<DownstreamState>>;
  using policyfunc_t = std::function<std::optional<SelectedServerPosition>(const NumberedServerVector& servers, const DNSQuestion*)>;
  using ffipolicyfunc_t = std::function<SelectedServerPosition(dnsdist_ffi_servers_list_t* servers, dnsdist_ffi_dnsquestion_t* dq)>;

  ServerPolicy(const std::string& name_, policyfunc_t policy_, bool isLua_) :
    d_name(name_), d_policy(std::move(policy_)), d_isLua(isLua_)
  {
  }

  ServerPolicy(const std::string& name_, ffipolicyfunc_t policy_) :
    d_name(name_), d_ffipolicy(std::move(policy_)), d_isLua(true), d_isFFI(true)
  {
  }

  /* create a per-thread FFI policy */
  ServerPolicy(const std::string& name_, const std::string& code);

  ServerPolicy()
  {
  }

  class SelectedBackend
  {
  public:
    SelectedBackend(const NumberedServerVector& backends) :
      d_backends(&backends)
    {
    }

    void setSelected(SelectedServerPosition selected)
    {
      if (selected >= d_backends->size()) {
        throw std::runtime_error("Setting an invalid backend position (" + std::to_string(selected) + " out of " + std::to_string(d_backends->size()) + ") from the server policy");
      }
      d_selected = selected;
    }

    operator bool() const noexcept
    {
      return d_selected.has_value();
    }

    DownstreamState* operator->() const
    {
      return (*d_backends)[*d_selected].second.get();
    }

    const std::shared_ptr<DownstreamState>& get() const
    {
      return (*d_backends)[*d_selected].second;
    }

  private:
    const NumberedServerVector* d_backends{nullptr};
    std::optional<SelectedServerPosition> d_selected{std::nullopt};
  };

  SelectedBackend getSelectedBackend(const ServerPolicy::NumberedServerVector& servers, DNSQuestion& dnsQuestion) const;

  const std::string& getName() const
  {
    return d_name;
  }

  std::string toString() const
  {
    return std::string("ServerPolicy") + (d_isLua ? " (Lua)" : "") + " \"" + d_name + "\"";
  }

private:
  struct PerThreadState;

  const ffipolicyfunc_t& getPerThreadPolicy() const;
  static thread_local std::unique_ptr<PerThreadState> t_perThreadState;

public:
  std::string d_name;
  std::string d_perThreadPolicyCode;

  policyfunc_t d_policy;
  ffipolicyfunc_t d_ffipolicy;

  bool d_isLua{false};
  bool d_isFFI{false};
  bool d_isPerThread{false};
};

struct ServerPool;

using pools_t = std::map<std::string, std::shared_ptr<ServerPool>>;
const ServerPool& getPool(const std::string& poolName);
const ServerPool& createPoolIfNotExists(const std::string& poolName);
void setPoolPolicy(const std::string& poolName, std::shared_ptr<ServerPolicy> policy);
void addServerToPool(const std::string& poolName, std::shared_ptr<DownstreamState> server);
void removeServerFromPool(const std::string& poolName, std::shared_ptr<DownstreamState> server);

const ServerPolicy::NumberedServerVector& getDownstreamCandidates(const std::string& poolName);

std::optional<ServerPolicy::SelectedServerPosition> firstAvailable(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> leastOutstanding(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> wrandom(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> whashed(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> whashedFromHash(const ServerPolicy::NumberedServerVector& servers, size_t hash);
std::optional<ServerPolicy::SelectedServerPosition> chashed(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> chashedFromHash(const ServerPolicy::NumberedServerVector& servers, size_t hash);
std::optional<ServerPolicy::SelectedServerPosition> roundrobin(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
std::optional<ServerPolicy::SelectedServerPosition> orderedWrandUntag(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);

#include <unordered_map>

namespace dnsdist::lbpolicies
{
const std::vector<std::shared_ptr<ServerPolicy>>& getBuiltInPolicies();
}

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22	#pragma once
23
24	#include <memory>
25	#include <optional>
26
27	struct dnsdist_ffi_servers_list_t;
28	struct dnsdist_ffi_server_t;
29	struct dnsdist_ffi_dnsquestion_t;
30
31	struct DNSQuestion;
32	struct DownstreamState;
33
34	struct PerThreadPoliciesState;
35
36	class ServerPolicy
37	{
38	public:
39	using SelectedServerPosition = unsigned int;
40	template <class T>
41	using Numbered = std::pair<unsigned int, T>;
42	using NumberedServer = Numbered<std::shared_ptr<DownstreamState>>;
43	template <class T>
44	using NumberedVector = std::vector<std::pair<unsigned int, T>>;
45	using NumberedServerVector = NumberedVector<std::shared_ptr<DownstreamState>>;
46	using policyfunc_t = std::function<std::optional<SelectedServerPosition>(const NumberedServerVector& servers, const DNSQuestion*)>;
47	using ffipolicyfunc_t = std::function<SelectedServerPosition(dnsdist_ffi_servers_list_t* servers, dnsdist_ffi_dnsquestion_t* dq)>;
48
49	ServerPolicy(const std::string& name_, policyfunc_t policy_, bool isLua_) :
50	d_name(name_), d_policy(std::move(policy_)), d_isLua(isLua_)	6,523✔
51	{	6,523✔
52	}	6,523✔
53
54	ServerPolicy(const std::string& name_, ffipolicyfunc_t policy_) :
55	d_name(name_), d_ffipolicy(std::move(policy_)), d_isLua(true), d_isFFI(true)	2✔
56	{	2✔
57	}	2✔
58
59	/* create a per-thread FFI policy */
60	ServerPolicy(const std::string& name_, const std::string& code);
61
62	ServerPolicy()
63	{	805✔
64	}	805✔
65
66	class SelectedBackend
67	{
68	public:
69	SelectedBackend(const NumberedServerVector& backends) :
70	d_backends(&backends)	14,256✔
71	{	14,256✔
72	}	14,256✔
73
74	void setSelected(SelectedServerPosition selected)
75	{	8,325✔
76	if (selected >= d_backends->size()) {	8,325!
77	throw std::runtime_error("Setting an invalid backend position (" + std::to_string(selected) + " out of " + std::to_string(d_backends->size()) + ") from the server policy");	×
78	}	×
79	d_selected = selected;	8,325✔
80	}	8,325✔
81
82	operator bool() const noexcept
83	{	32,030✔
84	return d_selected.has_value();	32,030✔
85	}	32,030✔
86
87	DownstreamState* operator->() const
88	{	20,462✔
89	return (d_backends)[d_selected].second.get();	20,462✔
90	}	20,462✔
91
92	const std::shared_ptr<DownstreamState>& get() const
93	{	8,323✔
94	return (d_backends)[d_selected].second;	8,323✔
95	}	8,323✔
96
97	private:
98	const NumberedServerVector* d_backends{nullptr};
99	std::optional<SelectedServerPosition> d_selected{std::nullopt};
100	};
101
102	SelectedBackend getSelectedBackend(const ServerPolicy::NumberedServerVector& servers, DNSQuestion& dnsQuestion) const;
103
104	const std::string& getName() const
105	{	418✔
106	return d_name;	418✔
107	}	418✔
108
109	std::string toString() const
110	{	×
111	return std::string("ServerPolicy") + (d_isLua ? " (Lua)" : "") + " \"" + d_name + "\"";	×
112	}	×
113
114	private:
115	struct PerThreadState;
116
117	const ffipolicyfunc_t& getPerThreadPolicy() const;
118	static thread_local std::unique_ptr<PerThreadState> t_perThreadState;
119
120	public:
121	std::string d_name;
122	std::string d_perThreadPolicyCode;
123
124	policyfunc_t d_policy;
125	ffipolicyfunc_t d_ffipolicy;
126
127	bool d_isLua{false};
128	bool d_isFFI{false};
129	bool d_isPerThread{false};
130	};
131
132	struct ServerPool;
133
134	using pools_t = std::map<std::string, std::shared_ptr<ServerPool>>;
135	const ServerPool& getPool(const std::string& poolName);
136	const ServerPool& createPoolIfNotExists(const std::string& poolName);
137	void setPoolPolicy(const std::string& poolName, std::shared_ptr<ServerPolicy> policy);
138	void addServerToPool(const std::string& poolName, std::shared_ptr<DownstreamState> server);
139	void removeServerFromPool(const std::string& poolName, std::shared_ptr<DownstreamState> server);
140
141	const ServerPolicy::NumberedServerVector& getDownstreamCandidates(const std::string& poolName);
142
143	std::optional<ServerPolicy::SelectedServerPosition> firstAvailable(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
144	std::optional<ServerPolicy::SelectedServerPosition> leastOutstanding(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
145	std::optional<ServerPolicy::SelectedServerPosition> wrandom(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
146	std::optional<ServerPolicy::SelectedServerPosition> whashed(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
147	std::optional<ServerPolicy::SelectedServerPosition> whashedFromHash(const ServerPolicy::NumberedServerVector& servers, size_t hash);
148	std::optional<ServerPolicy::SelectedServerPosition> chashed(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
149	std::optional<ServerPolicy::SelectedServerPosition> chashedFromHash(const ServerPolicy::NumberedServerVector& servers, size_t hash);
150	std::optional<ServerPolicy::SelectedServerPosition> roundrobin(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
151	std::optional<ServerPolicy::SelectedServerPosition> orderedWrandUntag(const ServerPolicy::NumberedServerVector& servers, const DNSQuestion* dnsQuestion);
152
153	#include <unordered_map>
154
155	namespace dnsdist::lbpolicies
156	{
157	const std::vector<std::shared_ptr<ServerPolicy>>& getBuiltInPolicies();
158	}

PowerDNS / pdns / 19741624072

Source File Press 'n' to go to next uncovered line, 'b' for previous

Source File
Press 'n' to go to next uncovered line, 'b' for previous