1 //
2 // Copyright (C) 2014 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16 
17 #ifndef UPDATE_ENGINE_UPDATE_MANAGER_UPDATER_PROVIDER_H_
18 #define UPDATE_ENGINE_UPDATE_MANAGER_UPDATER_PROVIDER_H_
19 
20 #include <string>
21 
22 #include <base/time/time.h>
23 
24 #include "update_engine/update_manager/provider.h"
25 #include "update_engine/update_manager/variable.h"
26 
27 namespace chromeos_update_manager {
28 
29 enum class Stage {
30   kIdle,
31   kCheckingForUpdate,
32   kUpdateAvailable,
33   kDownloading,
34   kVerifying,
35   kFinalizing,
36   kUpdatedNeedReboot,
37   kReportingErrorEvent,
38   kAttemptingRollback,
39 };
40 
41 enum class UpdateRequestStatus {
42   kNone,
43   kInteractive,
44   kPeriodic,
45 };
46 
47 // Provider for Chrome OS update related information.
48 class UpdaterProvider : public Provider {
49  public:
~UpdaterProvider()50   ~UpdaterProvider() override {}
51 
52   // A variable returning the timestamp when the update engine was started in
53   // wallclock time.
54   virtual Variable<base::Time>* var_updater_started_time() = 0;
55 
56   // A variable returning the last update check time.
57   virtual Variable<base::Time>* var_last_checked_time() = 0;
58 
59   // A variable reporting the time when an update was last completed in the
60   // current boot cycle. Returns an error if an update completed time could not
61   // be read (e.g. no update was completed in the current boot cycle) or is
62   // invalid.
63   //
64   // IMPORTANT: The time reported is not the wallclock time reading at the time
65   // of the update, rather it is the point in time when the update completed
66   // relative to the current wallclock time reading. Therefore, the gap between
67   // the reported value and the current wallclock time is guaranteed to be
68   // monotonically increasing.
69   virtual Variable<base::Time>* var_update_completed_time() = 0;
70 
71   // A variable returning the update progress (0.0 to 1.0).
72   virtual Variable<double>* var_progress() = 0;
73 
74   // A variable returning the current update status.
75   virtual Variable<Stage>* var_stage() = 0;
76 
77   // A variable returning the update target version.
78   virtual Variable<std::string>* var_new_version() = 0;
79 
80   // A variable returning the update payload size. The payload size is
81   // guaranteed to be non-negative.
82   virtual Variable<int64_t>* var_payload_size() = 0;
83 
84   // A variable returning the current channel.
85   virtual Variable<std::string>* var_curr_channel() = 0;
86 
87   // A variable returning the update target channel.
88   virtual Variable<std::string>* var_new_channel() = 0;
89 
90   // A variable indicating whether user settings allow P2P updates.
91   virtual Variable<bool>* var_p2p_enabled() = 0;
92 
93   // A variable indicating whether user settings allow updates over a cellular
94   // network.
95   virtual Variable<bool>* var_cellular_enabled() = 0;
96 
97   // A variable returning the number of consecutive failed update checks.
98   virtual Variable<unsigned int>* var_consecutive_failed_update_checks() = 0;
99 
100   // A server-dictated update check interval in seconds, if one was given.
101   virtual Variable<unsigned int>* var_server_dictated_poll_interval() = 0;
102 
103   // A variable denoting whether a forced update was request but no update check
104   // performed yet; also tells whether this request is for an interactive or
105   // scheduled update.
106   virtual Variable<UpdateRequestStatus>* var_forced_update_requested() = 0;
107 
108  protected:
UpdaterProvider()109   UpdaterProvider() {}
110 
111  private:
112   DISALLOW_COPY_AND_ASSIGN(UpdaterProvider);
113 };
114 
115 }  // namespace chromeos_update_manager
116 
117 #endif  // UPDATE_ENGINE_UPDATE_MANAGER_UPDATER_PROVIDER_H_
118