forked from snapcore/snapd
/
refreshhints.go
212 lines (186 loc) · 5.89 KB
/
refreshhints.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
package snapstate
import (
"fmt"
"time"
"github.com/snapcore/snapd/logger"
"github.com/snapcore/snapd/overlord/auth"
"github.com/snapcore/snapd/overlord/state"
"github.com/snapcore/snapd/release"
"github.com/snapcore/snapd/snap"
"github.com/snapcore/snapd/store"
"github.com/snapcore/snapd/timings"
)
var refreshHintsDelay = time.Duration(24 * time.Hour)
// refreshHints will ensure that we get regular data about refreshes
// so that we can potentially warn the user about important missing
// refreshes.
type refreshHints struct {
state *state.State
}
func newRefreshHints(st *state.State) *refreshHints {
return &refreshHints{state: st}
}
func (r *refreshHints) lastRefresh(timestampKey string) (time.Time, error) {
return getTime(r.state, timestampKey)
}
func (r *refreshHints) needsUpdate() (bool, error) {
tFull, err := r.lastRefresh("last-refresh")
if err != nil {
return false, err
}
tHints, err := r.lastRefresh("last-refresh-hints")
if err != nil {
return false, err
}
recentEnough := time.Now().Add(-refreshHintsDelay)
if tFull.After(recentEnough) || tFull.Equal(recentEnough) {
return false, nil
}
return tHints.Before(recentEnough), nil
}
func (r *refreshHints) refresh() error {
var refreshManaged bool
refreshManaged, _, _ = refreshScheduleManaged(r.state)
var err error
perfTimings := timings.New(map[string]string{"ensure": "refresh-hints"})
defer perfTimings.Save(r.state)
var updates []*snap.Info
var ignoreValidationByInstanceName map[string]bool
timings.Run(perfTimings, "refresh-candidates", "query store for refresh candidates", func(tm timings.Measurer) {
updates, _, ignoreValidationByInstanceName, err = refreshCandidates(auth.EnsureContextTODO(), r.state, nil, nil, &store.RefreshOptions{RefreshManaged: refreshManaged})
})
// TODO: we currently set last-refresh-hints even when there was an
// error. In the future we may retry with a backoff.
r.state.Set("last-refresh-hints", time.Now())
if err != nil {
return err
}
deviceCtx, err := DeviceCtxFromState(r.state, nil)
if err != nil {
return err
}
hints, err := refreshHintsFromCandidates(r.state, updates, ignoreValidationByInstanceName, deviceCtx)
if err != nil {
return fmt.Errorf("internal error: cannot get refresh-candidates: %v", err)
}
r.state.Set("refresh-candidates", hints)
return nil
}
// AtSeed configures hints refresh policies at end of seeding.
func (r *refreshHints) AtSeed() error {
// on classic hold hints refreshes for a full 24h
if release.OnClassic {
var t1 time.Time
err := r.state.Get("last-refresh-hints", &t1)
if err != state.ErrNoState {
// already set or other error
return err
}
r.state.Set("last-refresh-hints", time.Now())
}
return nil
}
// Ensure will ensure that refresh hints are available on a regular
// interval.
func (r *refreshHints) Ensure() error {
r.state.Lock()
defer r.state.Unlock()
// CanAutoRefresh is a hook that is set by the devicestate
// code to ensure that we only AutoRefersh if the device has
// bootstraped itself enough. This is only nil when snapstate
// is used in isolation (like in tests).
if CanAutoRefresh == nil {
return nil
}
if ok, err := CanAutoRefresh(r.state); err != nil || !ok {
return err
}
needsUpdate, err := r.needsUpdate()
if err != nil {
return err
}
if !needsUpdate {
return nil
}
return r.refresh()
}
func refreshHintsFromCandidates(st *state.State, updates []*snap.Info, ignoreValidationByInstanceName map[string]bool, deviceCtx DeviceContext) (map[string]*refreshCandidate, error) {
if ValidateRefreshes != nil && len(updates) != 0 {
userID := 0
var err error
updates, err = ValidateRefreshes(st, updates, ignoreValidationByInstanceName, userID, deviceCtx)
if err != nil {
return nil, err
}
}
hints := make(map[string]*refreshCandidate, len(updates))
for _, update := range updates {
var snapst SnapState
if err := Get(st, update.InstanceName(), &snapst); err != nil {
return nil, err
}
flags := snapst.Flags
flags.IsAutoRefresh = true
flags, err := earlyChecks(st, &snapst, update, flags)
if err != nil {
logger.Debugf("update hint for %q is not applicable: %v", update.InstanceName(), err)
continue
}
snapsup := &refreshCandidate{
SnapSetup: SnapSetup{
Base: update.Base,
Prereq: defaultContentPlugProviders(st, update),
Channel: snapst.TrackingChannel,
CohortKey: snapst.CohortKey,
// UserID not set
Flags: flags.ForSnapSetup(),
DownloadInfo: &update.DownloadInfo,
SideInfo: &update.SideInfo,
Type: update.Type(),
PlugsOnly: len(update.Slots) == 0,
InstanceKey: update.InstanceKey,
auxStoreInfo: auxStoreInfo{
Website: update.Website,
Media: update.Media,
},
},
Version: update.Version,
}
hints[update.InstanceName()] = snapsup
}
return hints, nil
}
// pruneRefreshCandidates removes the given snaps from refresh-candidates map
// in the state.
func pruneRefreshCandidates(st *state.State, snaps ...string) error {
var candidates map[string]*refreshCandidate
err := st.Get("refresh-candidates", &candidates)
if err != nil {
if err == state.ErrNoState {
return nil
}
return err
}
for _, snapName := range snaps {
delete(candidates, snapName)
}
st.Set("refresh-candidates", candidates)
return nil
}