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cherry-pick: 4358 fix stats

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Merge in DNS/adguard-home from 4358-fix-stats to master

Updates #4358.
Updates #4342.

Squashed commit of the following:

commit 5683cb304688ea639e5ba7f219a7bf12370211a4
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 4 18:20:54 2022 +0300

    stats: rm races test

commit 63dd67650ed64eaf9685b955a4fdf3c0067a7f8c
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 4 17:13:36 2022 +0300

    stats: try to imp test

commit 59a0f249fc00566872db62e362c87bc0c201b333
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 4 16:38:57 2022 +0300

    stats: fix nil ptr deref

commit 7fc3ff18a34a1d0e0fec3ca83a33f499ac752572
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Apr 7 16:02:51 2022 +0300

    stats: fix races finally, imp tests

commit c63f5f4e7929819fe79b3a1e392f6b91cd630846
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 4 00:56:49 2022 +0300

    aghhttp: add register func

commit 61adc7f0e95279c1b7f4a0c0af5ab387ee461411
Merge: edbdb2d4 9b3adac1
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 4 00:36:01 2022 +0300

    Merge branch 'master' into 4358-fix-stats

commit edbdb2d4c6a06dcbf8107a28c4c3a61ba394e907
Merge: a91e4d7a a481ff4c
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 3 21:00:42 2022 +0300

    Merge branch 'master' into 4358-fix-stats

commit a91e4d7af13591eeef45cb7980d1ebc1650a5cb7
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 3 18:46:19 2022 +0300

    stats: imp code, docs

commit c5f3814c5c1a734ca8ff6726cc9ffc1177a055cf
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 3 18:16:13 2022 +0300

    all: log changes

commit 5e6caafc771dddc4c6be07c34658de359106fbe5
Merge: 091ba756 eb8e8166
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 3 18:09:10 2022 +0300

    Merge branch 'master' into 4358-fix-stats

commit 091ba75618d3689b9c04f05431283417c8cc52f9
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 3 18:07:39 2022 +0300

    stats: imp docs, code

commit f2b2de77ce5f0448d6df9232a614a3710f1e2e8a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Aug 2 17:09:30 2022 +0300

    all: refactor stats & add mutexes

commit b3f11c455ceaa3738ec20eefc46f866ff36ed046
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Apr 27 15:30:09 2022 +0300

    WIP
This commit is contained in:
Eugene Burkov 2022-08-04 19:05:28 +03:00 committed by Ainar Garipov
parent 56dc3eab02
commit 39b404be19
15 changed files with 434 additions and 300 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
internal/aghhttp/aghhttp.go
View file

@ -9,6 +9,12 @@ import (
"github.com/AdguardTeam/golibs/log"
)
// RegisterFunc is the function that sets the handler to handle the URL for the
// method.
//
// TODO(e.burkov, a.garipov): Get rid of it.
type RegisterFunc func(method, url string, handler http.HandlerFunc)
// OK responds with word OK.
func OK(w http.ResponseWriter) {
if _, err := io.WriteString(w, "OK\n"); err != nil {

4
internal/dhcpd/dhcpd.go
View file

@ -5,11 +5,11 @@ import (
"encoding/json"
"fmt"
"net"
"net/http"
"path/filepath"
"runtime"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/netutil"
)
@ -126,7 +126,7 @@ type ServerConfig struct {
ConfigModified func() `yaml:"-"`
// Register an HTTP handler
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request)) `yaml:"-"`
HTTPRegister aghhttp.RegisterFunc `yaml:"-"`
Enabled bool `yaml:"enabled"`
InterfaceName string `yaml:"interface_name"`

4
internal/dnsforward/config.go
View file

@ -5,12 +5,12 @@ import (
"crypto/x509"
"fmt"
"net"
"net/http"
"os"
"sort"
"strings"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/AdGuardHome/internal/filtering"
"github.com/AdguardTeam/dnsproxy/proxy"
"github.com/AdguardTeam/dnsproxy/upstream"
@ -191,7 +191,7 @@ type ServerConfig struct {
ConfigModified func()
// Register an HTTP handler
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
HTTPRegister aghhttp.RegisterFunc
// ResolveClients signals if the RDNS should resolve clients' addresses.
ResolveClients bool

4
internal/dnsforward/dnsforward.go
View file

@ -61,7 +61,7 @@ type Server struct {
dnsFilter *filtering.DNSFilter // DNS filter instance
dhcpServer dhcpd.ServerInterface // DHCP server instance (optional)
queryLog querylog.QueryLog // Query log instance
stats stats.Stats
stats stats.Interface
access *accessCtx
// localDomainSuffix is the suffix used to detect internal hosts. It
@ -107,7 +107,7 @@ const defaultLocalDomainSuffix = "lan"
// DNSCreateParams are parameters to create a new server.
type DNSCreateParams struct {
DNSFilter *filtering.DNSFilter
Stats stats.Stats
Stats stats.Interface
QueryLog querylog.QueryLog
DHCPServer dhcpd.ServerInterface
PrivateNets netutil.SubnetSet

2
internal/dnsforward/stats_test.go
View file

@ -34,7 +34,7 @@ func (l *testQueryLog) Add(p *querylog.AddParams) {
type testStats struct {
// Stats is embedded here simply to make testStats a stats.Stats without
// actually implementing all methods.
stats.Stats
stats.Interface
lastEntry stats.Entry
}

4
internal/filtering/filtering.go
View file

@ -6,7 +6,6 @@ import (
"fmt"
"io/fs"
"net"
"net/http"
"os"
"runtime"
"runtime/debug"
@ -14,6 +13,7 @@ import (
"sync"
"sync/atomic"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
"github.com/AdguardTeam/dnsproxy/upstream"
"github.com/AdguardTeam/golibs/cache"
@ -94,7 +94,7 @@ type Config struct {
ConfigModified func() `yaml:"-"`
// Register an HTTP handler
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request)) `yaml:"-"`
HTTPRegister aghhttp.RegisterFunc `yaml:"-"`
// CustomResolver is the resolver used by DNSFilter.
CustomResolver Resolver `yaml:"-"`

29
internal/home/clients.go
View file

@ -2,6 +2,7 @@ package home
import (
"bytes"
"encoding"
"fmt"
"net"
"sort"
@ -60,6 +61,33 @@ const (
ClientSourceHostsFile
)
var _ fmt.Stringer = clientSource(0)
// String returns a human-readable name of cs.
func (cs clientSource) String() (s string) {
switch cs {
case ClientSourceWHOIS:
return "WHOIS"
case ClientSourceARP:
return "ARP"
case ClientSourceRDNS:
return "rDNS"
case ClientSourceDHCP:
return "DHCP"
case ClientSourceHostsFile:
return "etc/hosts"
default:
return ""
}
}
var _ encoding.TextMarshaler = clientSource(0)
// MarshalText implements encoding.TextMarshaler for the clientSource.
func (cs clientSource) MarshalText() (text []byte, err error) {
return []byte(cs.String()), nil
}
// clientSourceConf is used to configure where the runtime clients will be
// obtained from.
type clientSourcesConf struct {
@ -397,6 +425,7 @@ func (clients *clientsContainer) Find(id string) (c *Client, ok bool) {
c.Tags = stringutil.CloneSlice(c.Tags)
c.BlockedServices = stringutil.CloneSlice(c.BlockedServices)
c.Upstreams = stringutil.CloneSlice(c.Upstreams)
return c, true
}

37
internal/home/clientshttp.go
View file

@ -47,9 +47,9 @@ type clientJSON struct {
type runtimeClientJSON struct {
WHOISInfo *RuntimeClientWHOISInfo `json:"whois_info"`
Name string `json:"name"`
Source string `json:"source"`
IP net.IP `json:"ip"`
Name string `json:"name"`
Source clientSource `json:"source"`
IP net.IP `json:"ip"`
}
type clientListJSON struct {
@ -81,20 +81,9 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http
cj := runtimeClientJSON{
WHOISInfo: rc.WHOISInfo,
Name: rc.Host,
IP: ip,
}
cj.Source = "etc/hosts"
switch rc.Source {
case ClientSourceDHCP:
cj.Source = "DHCP"
case ClientSourceRDNS:
cj.Source = "rDNS"
case ClientSourceARP:
cj.Source = "ARP"
case ClientSourceWHOIS:
cj.Source = "WHOIS"
Name: rc.Host,
Source: rc.Source,
IP: ip,
}
data.RuntimeClients = append(data.RuntimeClients, cj)
@ -107,13 +96,7 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http
w.Header().Set("Content-Type", "application/json")
e := json.NewEncoder(w).Encode(data)
if e != nil {
aghhttp.Error(
r,
w,
http.StatusInternalServerError,
"Failed to encode to json: %v",
e,
)
aghhttp.Error(r, w, http.StatusInternalServerError, "failed to encode to json: %v", e)
return
}
@ -279,9 +262,9 @@ func (clients *clientsContainer) handleFindClient(w http.ResponseWriter, r *http
func (clients *clientsContainer) findRuntime(ip net.IP, idStr string) (cj *clientJSON) {
rc, ok := clients.FindRuntimeClient(ip)
if !ok {
// It is still possible that the IP used to be in the runtime
// clients list, but then the server was reloaded. So, check
// the DNS server's blocked IP list.
// It is still possible that the IP used to be in the runtime clients
// list, but then the server was reloaded. So, check the DNS server's
// blocked IP list.
//
// See https://github.com/AdguardTeam/AdGuardHome/issues/2428.
disallowed, rule := clients.dnsServer.IsBlockedClient(ip, idStr)

2
internal/home/control.go
View file

@ -189,7 +189,7 @@ func registerControlHandlers() {
RegisterAuthHandlers()
}
func httpRegister(method, url string, handler func(http.ResponseWriter, *http.Request)) {
func httpRegister(method, url string, handler http.HandlerFunc) {
if method == "" {
// "/dns-query" handler doesn't need auth, gzip and isn't restricted by 1 HTTP method
Context.mux.HandleFunc(url, postInstall(handler))

2
internal/home/home.go
View file

@ -46,7 +46,7 @@ type homeContext struct {
// --
clients clientsContainer // per-client-settings module
stats stats.Stats // statistics module
stats stats.Interface // statistics module
queryLog querylog.QueryLog // query log module
dnsServer *dnsforward.Server // DNS module
rdns *RDNS // rDNS module

4
internal/querylog/querylog.go
View file

@ -2,10 +2,10 @@ package querylog
import (
"net"
"net/http"
"path/filepath"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
"github.com/AdguardTeam/AdGuardHome/internal/filtering"
"github.com/AdguardTeam/golibs/errors"
@ -38,7 +38,7 @@ type Config struct {
ConfigModified func()
// HTTPRegister registers an HTTP handler.
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
HTTPRegister aghhttp.RegisterFunc
// FindClient returns client information by their IDs.
FindClient func(ids []string) (c *Client, err error)

53
internal/stats/http.go
View file

@ -39,34 +39,21 @@ type statsResponse struct {
}
// handleStats is a handler for getting statistics.
func (s *statsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
func (s *StatsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
start := time.Now()
var resp statsResponse
if s.conf.limit == 0 {
resp = statsResponse{
TimeUnits: "days",
var ok bool
resp, ok = s.getData()
TopBlocked: []topAddrs{},
TopClients: []topAddrs{},
TopQueried: []topAddrs{},
log.Debug("stats: prepared data in %v", time.Since(start))
BlockedFiltering: []uint64{},
DNSQueries: []uint64{},
ReplacedParental: []uint64{},
ReplacedSafebrowsing: []uint64{},
}
} else {
var ok bool
resp, ok = s.getData()
if !ok {
// Don't bring the message to the lower case since it's a part of UI
// text for the moment.
aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get statistics data")
log.Debug("stats: prepared data in %v", time.Since(start))
if !ok {
aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get statistics data")
return
}
return
}
w.Header().Set("Content-Type", "application/json")
@ -84,9 +71,9 @@ type config struct {
}
// Get configuration
func (s *statsCtx) handleStatsInfo(w http.ResponseWriter, r *http.Request) {
func (s *StatsCtx) handleStatsInfo(w http.ResponseWriter, r *http.Request) {
resp := config{}
resp.IntervalDays = s.conf.limit / 24
resp.IntervalDays = s.limitHours / 24
data, err := json.Marshal(resp)
if err != nil {
@ -102,7 +89,7 @@ func (s *statsCtx) handleStatsInfo(w http.ResponseWriter, r *http.Request) {
}
// Set configuration
func (s *statsCtx) handleStatsConfig(w http.ResponseWriter, r *http.Request) {
func (s *StatsCtx) handleStatsConfig(w http.ResponseWriter, r *http.Request) {
reqData := config{}
err := json.NewDecoder(r.Body).Decode(&reqData)
if err != nil {
@ -118,22 +105,22 @@ func (s *statsCtx) handleStatsConfig(w http.ResponseWriter, r *http.Request) {
}
s.setLimit(int(reqData.IntervalDays))
s.conf.ConfigModified()
s.configModified()
}
// Reset data
func (s *statsCtx) handleStatsReset(w http.ResponseWriter, r *http.Request) {
func (s *StatsCtx) handleStatsReset(w http.ResponseWriter, r *http.Request) {
s.clear()
}
// Register web handlers
func (s *statsCtx) initWeb() {
if s.conf.HTTPRegister == nil {
func (s *StatsCtx) initWeb() {
if s.httpRegister == nil {
return
}
s.conf.HTTPRegister(http.MethodGet, "/control/stats", s.handleStats)
s.conf.HTTPRegister(http.MethodPost, "/control/stats_reset", s.handleStatsReset)
s.conf.HTTPRegister(http.MethodPost, "/control/stats_config", s.handleStatsConfig)
s.conf.HTTPRegister(http.MethodGet, "/control/stats_info", s.handleStatsInfo)
s.httpRegister(http.MethodGet, "/control/stats", s.handleStats)
s.httpRegister(http.MethodPost, "/control/stats_reset", s.handleStatsReset)
s.httpRegister(http.MethodPost, "/control/stats_config", s.handleStatsConfig)
s.httpRegister(http.MethodGet, "/control/stats_info", s.handleStatsInfo)
}

77
internal/stats/stats.go
View file

@ -4,75 +4,85 @@ package stats
import (
"net"
"net/http"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
)
type unitIDCallback func() uint32
// UnitIDGenFunc is the signature of a function that generates a unique ID for
// the statistics unit.
type UnitIDGenFunc func() (id uint32)
// DiskConfig - configuration settings that are stored on disk
// DiskConfig is the configuration structure that is stored in file.
type DiskConfig struct {
Interval uint32 `yaml:"statistics_interval"` // time interval for statistics (in days)
// Interval is the number of days for which the statistics are collected
// before flushing to the database.
Interval uint32 `yaml:"statistics_interval"`
}
// Config - module configuration
// Config is the configuration structure for the statistics collecting.
type Config struct {
Filename string // database file name
LimitDays uint32 // time limit (in days)
UnitID unitIDCallback // user function to get the current unit ID. If nil, the current time hour is used.
// UnitID is the function to generate the identifier for current unit. If
// nil, the default function is used, see newUnitID.
UnitID UnitIDGenFunc
// Called when the configuration is changed by HTTP request
// ConfigModified will be called each time the configuration changed via web
// interface.
ConfigModified func()
// Register an HTTP handler
HTTPRegister func(string, string, func(http.ResponseWriter, *http.Request))
// HTTPRegister is the function that registers handlers for the stats
// endpoints.
HTTPRegister aghhttp.RegisterFunc
limit uint32 // maximum time we need to keep data for (in hours)
// Filename is the name of the database file.
Filename string
// LimitDays is the maximum number of days to collect statistics into the
// current unit.
LimitDays uint32
}
// New - create object
func New(conf Config) (Stats, error) {
return createObject(conf)
}
// Stats - main interface
type Stats interface {
// Interface is the statistics interface to be used by other packages.
type Interface interface {
// Start begins the statistics collecting.
Start()
// Close object.
// This function is not thread safe
// (can't be called in parallel with any other function of this interface).
// Close stops the statistics collecting.
Close()
// Update counters
// Update collects the incoming statistics data.
Update(e Entry)
// Get IP addresses of the clients with the most number of requests
// GetTopClientIP returns at most limit IP addresses corresponding to the
// clients with the most number of requests.
GetTopClientsIP(limit uint) []net.IP
// WriteDiskConfig - write configuration
// WriteDiskConfig puts the Interface's configuration to the dc.
WriteDiskConfig(dc *DiskConfig)
}
// TimeUnit - time unit
// TimeUnit is the unit of measuring time while aggregating the statistics.
type TimeUnit int
// Supported time units
// Supported TimeUnit values.
const (
Hours TimeUnit = iota
Days
)
// Result of DNS request processing
// Result is the resulting code of processing the DNS request.
type Result int
// Supported result values
// Supported Result values.
//
// TODO(e.burkov): Think about better naming.
const (
RNotFiltered Result = iota + 1
RFiltered
RSafeBrowsing
RSafeSearch
RParental
rLast
resultLast = RParental + 1
)
// Entry is a statistics data entry.
@ -82,7 +92,12 @@ type Entry struct {
// TODO(a.garipov): Make this a {net.IP, string} enum?
Client string
// Domain is the domain name requested.
Domain string
// Result is the result of processing the request.
Result Result
Time uint32 // processing time (msec)
// Time is the duration of the request processing in milliseconds.
Time uint32
}

4
internal/stats/stats_test.go
View file

@ -37,7 +37,7 @@ func TestStats(t *testing.T) {
LimitDays: 1,
}
s, err := createObject(conf)
s, err := New(conf)
require.NoError(t, err)
testutil.CleanupAndRequireSuccess(t, func() (err error) {
s.clear()
@ -110,7 +110,7 @@ func TestLargeNumbers(t *testing.T) {
LimitDays: 1,
UnitID: newID,
}
s, err := createObject(conf)
s, err := New(conf)
require.NoError(t, err)
testutil.CleanupAndRequireSuccess(t, func() (err error) {
s.Close()

502
internal/stats/unit.go
View file

@ -9,11 +9,13 @@ import (
"os"
"sort"
"sync"
"sync/atomic"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
bolt "go.etcd.io/bbolt"
"go.etcd.io/bbolt"
)
// TODO(a.garipov): Rewrite all of this. Add proper error handling and
@ -24,47 +26,130 @@ const (
maxClients = 100 // max number of top clients to store in file or return via Get()
)
// statsCtx - global context
type statsCtx struct {
// mu protects unit.
mu *sync.Mutex
// current is the actual statistics collection result.
current *unit
// StatsCtx collects the statistics and flushes it to the database. Its default
// flushing interval is one hour.
//
// TODO(e.burkov): Use atomic.Pointer for accessing curr and db in go1.19.
type StatsCtx struct {
// currMu protects the current unit.
currMu *sync.Mutex
// curr is the actual statistics collection result.
curr *unit
db *bolt.DB
conf *Config
// dbMu protects db.
dbMu *sync.Mutex
// db is the opened statistics database, if any.
db *bbolt.DB
// unitIDGen is the function that generates an identifier for the current
// unit. It's here for only testing purposes.
unitIDGen UnitIDGenFunc
// httpRegister is used to set HTTP handlers.
httpRegister aghhttp.RegisterFunc
// configModified is called whenever the configuration is modified via web
// interface.
configModified func()
// filename is the name of database file.
filename string
// limitHours is the maximum number of hours to collect statistics into the
// current unit.
limitHours uint32
}
// data for 1 time unit
// unit collects the statistics data for a specific period of time.
type unit struct {
id uint32 // unit ID. Default: absolute hour since Jan 1, 1970
// mu protects all the fields of a unit.
mu *sync.RWMutex
nTotal uint64 // total requests
nResult []uint64 // number of requests per one result
timeSum uint64 // sum of processing time of all requests (usec)
// id is the unique unit's identifier. It's set to an absolute hour number
// since the beginning of UNIX time by the default ID generating function.
id uint32
// top:
domains map[string]uint64 // number of requests per domain
blockedDomains map[string]uint64 // number of blocked requests per domain
clients map[string]uint64 // number of requests per client
// nTotal stores the total number of requests.
nTotal uint64
// nResult stores the number of requests grouped by it's result.
nResult []uint64
// timeSum stores the sum of processing time in milliseconds of each request
// written by the unit.
timeSum uint64
// domains stores the number of requests for each domain.
domains map[string]uint64
// blockedDomains stores the number of requests for each domain that has
// been blocked.
blockedDomains map[string]uint64
// clients stores the number of requests from each client.
clients map[string]uint64
}
// name-count pair
// ongoing returns the current unit. It's safe for concurrent use.
//
// Note that the unit itself should be locked before accessing.
func (s *StatsCtx) ongoing() (u *unit) {
s.currMu.Lock()
defer s.currMu.Unlock()
return s.curr
}
// swapCurrent swaps the current unit with another and returns it. It's safe
// for concurrent use.
func (s *StatsCtx) swapCurrent(with *unit) (old *unit) {
s.currMu.Lock()
defer s.currMu.Unlock()
old, s.curr = s.curr, with
return old
}
// database returns the database if it's opened. It's safe for concurrent use.
func (s *StatsCtx) database() (db *bbolt.DB) {
s.dbMu.Lock()
defer s.dbMu.Unlock()
return s.db
}
// swapDatabase swaps the database with another one and returns it. It's safe
// for concurrent use.
func (s *StatsCtx) swapDatabase(with *bbolt.DB) (old *bbolt.DB) {
s.dbMu.Lock()
defer s.dbMu.Unlock()
old, s.db = s.db, with
return old
}
// countPair is a single name-number pair for deserializing statistics data into
// the database.
type countPair struct {
Name string
Count uint64
}
// structure for storing data in file
// unitDB is the structure for deserializing statistics data into the database.
type unitDB struct {
NTotal uint64
// NTotal is the total number of requests.
NTotal uint64
// NResult is the number of requests by the result's kind.
NResult []uint64
Domains []countPair
// Domains is the number of requests for each domain name.
Domains []countPair
// BlockedDomains is the number of requests blocked for each domain name.
BlockedDomains []countPair
Clients []countPair
// Clients is the number of requests from each client.
Clients []countPair
TimeAvg uint32 // usec
// TimeAvg is the average of processing times in milliseconds of all the
// requests in the unit.
TimeAvg uint32
}
// withRecovered turns the value recovered from panic if any into an error and
@ -86,34 +171,40 @@ func withRecovered(orig *error) {
*orig = errors.WithDeferred(*orig, err)
}
// createObject creates s from conf and properly initializes it.
func createObject(conf Config) (s *statsCtx, err error) {
// isEnabled is a helper that check if the statistics collecting is enabled.
func (s *StatsCtx) isEnabled() (ok bool) {
return atomic.LoadUint32(&s.limitHours) != 0
}
// New creates s from conf and properly initializes it. Don't use s before
// calling it's Start method.
func New(conf Config) (s *StatsCtx, err error) {
defer withRecovered(&err)
s = &statsCtx{
mu: &sync.Mutex{},
s = &StatsCtx{
currMu: &sync.Mutex{},
dbMu: &sync.Mutex{},
filename: conf.Filename,
configModified: conf.ConfigModified,
httpRegister: conf.HTTPRegister,
}
if !checkInterval(conf.LimitDays) {
conf.LimitDays = 1
if s.limitHours = conf.LimitDays * 24; !checkInterval(conf.LimitDays) {
s.limitHours = 24
}
if s.unitIDGen = newUnitID; conf.UnitID != nil {
s.unitIDGen = conf.UnitID
}
s.conf = &Config{}
*s.conf = conf
s.conf.limit = conf.LimitDays * 24
if conf.UnitID == nil {
s.conf.UnitID = newUnitID
if err = s.dbOpen(); err != nil {
return nil, fmt.Errorf("opening database: %w", err)
}
if !s.dbOpen() {
return nil, fmt.Errorf("open database")
}
id := s.conf.UnitID()
tx := s.beginTxn(true)
id := s.unitIDGen()
tx := beginTxn(s.db, true)
var udb *unitDB
if tx != nil {
log.Tracef("Deleting old units...")
firstID := id - s.conf.limit - 1
firstID := id - s.limitHours - 1
unitDel := 0
err = tx.ForEach(newBucketWalker(tx, &unitDel, firstID))
@ -133,12 +224,11 @@ func createObject(conf Config) (s *statsCtx, err error) {
}
}
u := unit{}
s.initUnit(&u, id)
if udb != nil {
deserialize(&u, udb)
}
s.current = &u
u := newUnit(id)
// This use of deserialize is safe since the accessed unit has just been
// created.
u.deserialize(udb)
s.curr = u
log.Debug("stats: initialized")
@ -153,11 +243,11 @@ const errStop errors.Error = "stop iteration"
// integer that unitDelPtr points to is incremented for every successful
// deletion. If the bucket isn't deleted, f returns errStop.
func newBucketWalker(
tx *bolt.Tx,
tx *bbolt.Tx,
unitDelPtr *int,
firstID uint32,
) (f func(name []byte, b *bolt.Bucket) (err error)) {
return func(name []byte, _ *bolt.Bucket) (err error) {
) (f func(name []byte, b *bbolt.Bucket) (err error)) {
return func(name []byte, _ *bbolt.Bucket) (err error) {
nameID, ok := unitNameToID(name)
if !ok || nameID < firstID {
err = tx.DeleteBucket(name)
@ -178,80 +268,92 @@ func newBucketWalker(
}
}
func (s *statsCtx) Start() {
// Start makes s process the incoming data.
func (s *StatsCtx) Start() {
s.initWeb()
go s.periodicFlush()
}
func checkInterval(days uint32) bool {
// checkInterval returns true if days is valid to be used as statistics
// retention interval. The valid values are 0, 1, 7, 30 and 90.
func checkInterval(days uint32) (ok bool) {
return days == 0 || days == 1 || days == 7 || days == 30 || days == 90
}
func (s *statsCtx) dbOpen() bool {
var err error
// dbOpen returns an error if the database can't be opened from the specified
// file. It's safe for concurrent use.
func (s *StatsCtx) dbOpen() (err error) {
log.Tracef("db.Open...")
s.db, err = bolt.Open(s.conf.Filename, 0o644, nil)
s.dbMu.Lock()
defer s.dbMu.Unlock()
s.db, err = bbolt.Open(s.filename, 0o644, nil)
if err != nil {
log.Error("stats: open DB: %s: %s", s.conf.Filename, err)
log.Error("stats: open DB: %s: %s", s.filename, err)
if err.Error() == "invalid argument" {
log.Error("AdGuard Home cannot be initialized due to an incompatible file system.\nPlease read the explanation here: https://github.com/AdguardTeam/AdGuardHome/wiki/Getting-Started#limitations")
}
return false
return err
}
log.Tracef("db.Open")
return true
return nil
}
// Atomically swap the currently active unit with a new value
// Return old value
func (s *statsCtx) swapUnit(new *unit) (u *unit) {
s.mu.Lock()
defer s.mu.Unlock()
// newUnitID is the default UnitIDGenFunc that generates the unique id hourly.
func newUnitID() (id uint32) {
const secsInHour = int64(time.Hour / time.Second)
u = s.current
s.current = new
return u
return uint32(time.Now().Unix() / secsInHour)
}
// Get unit ID for the current hour
func newUnitID() uint32 {
return uint32(time.Now().Unix() / (60 * 60))
// newUnit allocates the new *unit.
func newUnit(id uint32) (u *unit) {
return &unit{
mu: &sync.RWMutex{},
id: id,
nResult: make([]uint64, resultLast),
domains: make(map[string]uint64),
blockedDomains: make(map[string]uint64),
clients: make(map[string]uint64),
}
}
// Initialize a unit
func (s *statsCtx) initUnit(u *unit, id uint32) {
u.id = id
u.nResult = make([]uint64, rLast)
u.domains = make(map[string]uint64)
u.blockedDomains = make(map[string]uint64)
u.clients = make(map[string]uint64)
}
// Open a DB transaction
func (s *statsCtx) beginTxn(wr bool) *bolt.Tx {
db := s.db
// beginTxn opens a new database transaction. If writable is true, the
// transaction will be opened for writing, and for reading otherwise. It
// returns nil if the transaction can't be created.
func beginTxn(db *bbolt.DB, writable bool) (tx *bbolt.Tx) {
if db == nil {
return nil
}
log.Tracef("db.Begin...")
tx, err := db.Begin(wr)
log.Tracef("opening a database transaction")
tx, err := db.Begin(writable)
if err != nil {
log.Error("db.Begin: %s", err)
log.Error("stats: opening a transaction: %s", err)
return nil
}
log.Tracef("db.Begin")
log.Tracef("transaction has been opened")
return tx
}
func (s *statsCtx) commitTxn(tx *bolt.Tx) {
// commitTxn applies the changes made in tx to the database.
func (s *StatsCtx) commitTxn(tx *bbolt.Tx) {
err := tx.Commit()
if err != nil {
log.Debug("tx.Commit: %s", err)
log.Error("stats: committing a transaction: %s", err)
return
}
log.Tracef("tx.Commit")
log.Tracef("transaction has been committed")
}
// bucketNameLen is the length of a bucket, a 64-bit unsigned integer.
@ -262,10 +364,10 @@ const bucketNameLen = 8
// idToUnitName converts a numerical ID into a database unit name.
func idToUnitName(id uint32) (name []byte) {
name = make([]byte, bucketNameLen)
binary.BigEndian.PutUint64(name, uint64(id))
n := [bucketNameLen]byte{}
binary.BigEndian.PutUint64(n[:], uint64(id))
return name
return n[:]
}
// unitNameToID converts a database unit name into a numerical ID. ok is false
@ -278,13 +380,6 @@ func unitNameToID(name []byte) (id uint32, ok bool) {
return uint32(binary.BigEndian.Uint64(name)), true
}
func (s *statsCtx) ongoing() (u *unit) {
s.mu.Lock()
defer s.mu.Unlock()
return s.current
}
// Flush the current unit to DB and delete an old unit when a new hour is started
// If a unit must be flushed:
// . lock DB
@ -293,34 +388,29 @@ func (s *statsCtx) ongoing() (u *unit) {
// . write the unit to DB
// . remove the stale unit from DB
// . unlock DB
func (s *statsCtx) periodicFlush() {
for {
ptr := s.ongoing()
if ptr == nil {
break
}
id := s.conf.UnitID()
if ptr.id == id || s.conf.limit == 0 {
func (s *StatsCtx) periodicFlush() {
for ptr := s.ongoing(); ptr != nil; ptr = s.ongoing() {
id := s.unitIDGen()
// Access the unit's ID with atomic to avoid locking the whole unit.
if !s.isEnabled() || atomic.LoadUint32(&ptr.id) == id {
time.Sleep(time.Second)
continue
}
tx := s.beginTxn(true)
tx := beginTxn(s.database(), true)
nu := unit{}
s.initUnit(&nu, id)
u := s.swapUnit(&nu)
udb := serialize(u)
nu := newUnit(id)
u := s.swapCurrent(nu)
udb := u.serialize()
if tx == nil {
continue
}
ok1 := s.flushUnitToDB(tx, u.id, udb)
ok2 := s.deleteUnit(tx, id-s.conf.limit)
if ok1 || ok2 {
flushOK := flushUnitToDB(tx, u.id, udb)
delOK := s.deleteUnit(tx, id-atomic.LoadUint32(&s.limitHours))
if flushOK || delOK {
s.commitTxn(tx)
} else {
_ = tx.Rollback()
@ -330,8 +420,8 @@ func (s *statsCtx) periodicFlush() {
log.Tracef("periodicFlush() exited")
}
// Delete unit's data from file
func (s *statsCtx) deleteUnit(tx *bolt.Tx, id uint32) bool {
// deleteUnit removes the unit by it's id from the database the tx belongs to.
func (s *StatsCtx) deleteUnit(tx *bbolt.Tx, id uint32) bool {
err := tx.DeleteBucket(idToUnitName(id))
if err != nil {
log.Tracef("stats: bolt DeleteBucket: %s", err)
@ -347,10 +437,7 @@ func (s *statsCtx) deleteUnit(tx *bolt.Tx, id uint32) bool {
func convertMapToSlice(m map[string]uint64, max int) []countPair {
a := []countPair{}
for k, v := range m {
pair := countPair{}
pair.Name = k
pair.Count = v
a = append(a, pair)
a = append(a, countPair{Name: k, Count: v})
}
less := func(i, j int) bool {
return a[j].Count < a[i].Count
@ -370,41 +457,46 @@ func convertSliceToMap(a []countPair) map[string]uint64 {
return m
}
func serialize(u *unit) *unitDB {
udb := unitDB{}
udb.NTotal = u.nTotal
udb.NResult = append(udb.NResult, u.nResult...)
// serialize converts u to the *unitDB. It's safe for concurrent use.
func (u *unit) serialize() (udb *unitDB) {
u.mu.RLock()
defer u.mu.RUnlock()
var timeAvg uint32 = 0
if u.nTotal != 0 {
udb.TimeAvg = uint32(u.timeSum / u.nTotal)
timeAvg = uint32(u.timeSum / u.nTotal)
}
udb.Domains = convertMapToSlice(u.domains, maxDomains)
udb.BlockedDomains = convertMapToSlice(u.blockedDomains, maxDomains)
udb.Clients = convertMapToSlice(u.clients, maxClients)
return &udb
return &unitDB{
NTotal: u.nTotal,
NResult: append([]uint64{}, u.nResult...),
Domains: convertMapToSlice(u.domains, maxDomains),
BlockedDomains: convertMapToSlice(u.blockedDomains, maxDomains),
Clients: convertMapToSlice(u.clients, maxClients),
TimeAvg: timeAvg,
}
}
func deserialize(u *unit, udb *unitDB) {
// deserealize assigns the appropriate values from udb to u. u must not be nil.
// It's safe for concurrent use.
func (u *unit) deserialize(udb *unitDB) {
if udb == nil {
return
}
u.mu.Lock()
defer u.mu.Unlock()
u.nTotal = udb.NTotal
n := len(udb.NResult)
if n < len(u.nResult) {
n = len(u.nResult) // n = min(len(udb.NResult), len(u.nResult))
}
for i := 1; i < n; i++ {
u.nResult[i] = udb.NResult[i]
}
u.nResult = make([]uint64, resultLast)
copy(u.nResult, udb.NResult)
u.domains = convertSliceToMap(udb.Domains)
u.blockedDomains = convertSliceToMap(udb.BlockedDomains)
u.clients = convertSliceToMap(udb.Clients)
u.timeSum = uint64(udb.TimeAvg) * u.nTotal
u.timeSum = uint64(udb.TimeAvg) * udb.NTotal
}
func (s *statsCtx) flushUnitToDB(tx *bolt.Tx, id uint32, udb *unitDB) bool {
func flushUnitToDB(tx *bbolt.Tx, id uint32, udb *unitDB) bool {
log.Tracef("Flushing unit %d", id)
bkt, err := tx.CreateBucketIfNotExists(idToUnitName(id))
@ -430,7 +522,7 @@ func (s *statsCtx) flushUnitToDB(tx *bolt.Tx, id uint32, udb *unitDB) bool {
return true
}
func (s *statsCtx) loadUnitFromDB(tx *bolt.Tx, id uint32) *unitDB {
func (s *StatsCtx) loadUnitFromDB(tx *bbolt.Tx, id uint32) *unitDB {
bkt := tx.Bucket(idToUnitName(id))
if bkt == nil {
return nil
@ -451,44 +543,44 @@ func (s *statsCtx) loadUnitFromDB(tx *bolt.Tx, id uint32) *unitDB {
return &udb
}
func convertTopSlice(a []countPair) []map[string]uint64 {
m := []map[string]uint64{}
func convertTopSlice(a []countPair) (m []map[string]uint64) {
m = make([]map[string]uint64, 0, len(a))
for _, it := range a {
ent := map[string]uint64{}
ent[it.Name] = it.Count
m = append(m, ent)
m = append(m, map[string]uint64{it.Name: it.Count})
}
return m
}
func (s *statsCtx) setLimit(limitDays int) {
s.conf.limit = uint32(limitDays) * 24
func (s *StatsCtx) setLimit(limitDays int) {
atomic.StoreUint32(&s.limitHours, uint32(24*limitDays))
if limitDays == 0 {
s.clear()
}
log.Debug("stats: set limit: %d", limitDays)
log.Debug("stats: set limit: %d days", limitDays)
}
func (s *statsCtx) WriteDiskConfig(dc *DiskConfig) {
dc.Interval = s.conf.limit / 24
func (s *StatsCtx) WriteDiskConfig(dc *DiskConfig) {
dc.Interval = atomic.LoadUint32(&s.limitHours) / 24
}
func (s *statsCtx) Close() {
u := s.swapUnit(nil)
udb := serialize(u)
tx := s.beginTxn(true)
if tx != nil {
if s.flushUnitToDB(tx, u.id, udb) {
func (s *StatsCtx) Close() {
u := s.swapCurrent(nil)
db := s.database()
if tx := beginTxn(db, true); tx != nil {
udb := u.serialize()
if flushUnitToDB(tx, u.id, udb) {
s.commitTxn(tx)
} else {
_ = tx.Rollback()
}
}
if s.db != nil {
if db != nil {
log.Tracef("db.Close...")
_ = s.db.Close()
_ = db.Close()
log.Tracef("db.Close")
}
@ -496,11 +588,11 @@ func (s *statsCtx) Close() {
}
// Reset counters and clear database
func (s *statsCtx) clear() {
tx := s.beginTxn(true)
func (s *StatsCtx) clear() {
db := s.database()
tx := beginTxn(db, true)
if tx != nil {
db := s.db
s.db = nil
_ = s.swapDatabase(nil)
_ = tx.Rollback()
// the active transactions can continue using database,
// but no new transactions will be opened
@ -509,11 +601,10 @@ func (s *statsCtx) clear() {
// all active transactions are now closed
}
u := unit{}
s.initUnit(&u, s.conf.UnitID())
_ = s.swapUnit(&u)
u := newUnit(s.unitIDGen())
_ = s.swapCurrent(u)
err := os.Remove(s.conf.Filename)
err := os.Remove(s.filename)
if err != nil {
log.Error("os.Remove: %s", err)
}
@ -523,13 +614,13 @@ func (s *statsCtx) clear() {
log.Debug("stats: cleared")
}
func (s *statsCtx) Update(e Entry) {
if s.conf.limit == 0 {
func (s *StatsCtx) Update(e Entry) {
if !s.isEnabled() {
return
}
if e.Result == 0 ||
e.Result >= rLast ||
e.Result >= resultLast ||
e.Domain == "" ||
e.Client == "" {
return
@ -540,13 +631,15 @@ func (s *statsCtx) Update(e Entry) {
clientID = ip.String()
}
s.mu.Lock()
defer s.mu.Unlock()
u := s.ongoing()
if u == nil {
return
}
u := s.current
u.mu.Lock()
defer u.mu.Unlock()
u.nResult[e.Result]++
if e.Result == RNotFiltered {
u.domains[e.Domain]++
} else {
@ -558,14 +651,19 @@ func (s *statsCtx) Update(e Entry) {
u.nTotal++
}
func (s *statsCtx) loadUnits(limit uint32) ([]*unitDB, uint32) {
tx := s.beginTxn(false)
func (s *StatsCtx) loadUnits(limit uint32) ([]*unitDB, uint32) {
tx := beginTxn(s.database(), false)
if tx == nil {
return nil, 0
}
cur := s.ongoing()
curID := cur.id
var curID uint32
if cur != nil {
curID = atomic.LoadUint32(&cur.id)
} else {
curID = s.unitIDGen()
}
// Per-hour units.
units := []*unitDB{}
@ -574,14 +672,16 @@ func (s *statsCtx) loadUnits(limit uint32) ([]*unitDB, uint32) {
u := s.loadUnitFromDB(tx, i)
if u == nil {
u = &unitDB{}
u.NResult = make([]uint64, rLast)
u.NResult = make([]uint64, resultLast)
}
units = append(units, u)
}
_ = tx.Rollback()
units = append(units, serialize(cur))
if cur != nil {
units = append(units, cur.serialize())
}
if len(units) != int(limit) {
log.Fatalf("len(units) != limit: %d %d", len(units), limit)
@ -628,13 +728,13 @@ func statsCollector(units []*unitDB, firstID uint32, timeUnit TimeUnit, ng numsG
// pairsGetter is a signature for topsCollector argument.
type pairsGetter func(u *unitDB) (pairs []countPair)
// topsCollector collects statistics about highest values fro the given *unitDB
// topsCollector collects statistics about highest values from the given *unitDB
// slice using pg to retrieve data.
func topsCollector(units []*unitDB, max int, pg pairsGetter) []map[string]uint64 {
m := map[string]uint64{}
for _, u := range units {
for _, it := range pg(u) {
m[it.Name] += it.Count
for _, cp := range pg(u) {
m[cp.Name] += cp.Count
}
}
a2 := convertMapToSlice(m, max)
@ -668,8 +768,22 @@ func topsCollector(units []*unitDB, max int, pg pairsGetter) []map[string]uint64
* parental-blocked
These values are just the sum of data for all units.
*/
func (s *statsCtx) getData() (statsResponse, bool) {
limit := s.conf.limit
func (s *StatsCtx) getData() (statsResponse, bool) {
limit := atomic.LoadUint32(&s.limitHours)
if limit == 0 {
return statsResponse{
TimeUnits: "days",
TopBlocked: []topAddrs{},
TopClients: []topAddrs{},
TopQueried: []topAddrs{},
BlockedFiltering: []uint64{},
DNSQueries: []uint64{},
ReplacedParental: []uint64{},
ReplacedSafebrowsing: []uint64{},
}, true
}
timeUnit := Hours
if limit/24 > 7 {
@ -698,7 +812,7 @@ func (s *statsCtx) getData() (statsResponse, bool) {
// Total counters:
sum := unitDB{
NResult: make([]uint64, rLast),
NResult: make([]uint64, resultLast),
}
timeN := 0
for _, u := range units {
@ -731,12 +845,12 @@ func (s *statsCtx) getData() (statsResponse, bool) {
return data, true
}
func (s *statsCtx) GetTopClientsIP(maxCount uint) []net.IP {
if s.conf.limit == 0 {
func (s *StatsCtx) GetTopClientsIP(maxCount uint) []net.IP {
if !s.isEnabled() {
return nil
}
units, _ := s.loadUnits(s.conf.limit)
units, _ := s.loadUnits(atomic.LoadUint32(&s.limitHours))
if units == nil {
return nil
}