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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_ | |
6 #define STORAGE_BROWSER_QUOTA_QUOTA_SETTINGS_H_ | |
7 | |
8 #include <stdint.h> | |
9 | |
10 #include "base/callback.h" | |
11 #include "base/files/file_path.h" | |
12 #include "base/optional.h" | |
13 #include "base/time/time.h" | |
14 #include "storage/browser/storage_browser_export.h" | |
15 | |
16 namespace storage { | |
17 | |
18 // Settings the storage lib embedder must provide to the QuotaManager. | |
19 struct QuotaSettings { | |
20 QuotaSettings() = default; | |
21 QuotaSettings(int64_t pool_size, | |
22 int64_t per_host_quota, | |
23 int64_t must_remain_available) | |
24 : pool_size(pool_size), | |
25 per_host_quota(per_host_quota), | |
26 must_remain_available(must_remain_available) {} | |
27 | |
28 // The target size in bytes of the shared pool of disk space the quota | |
29 // system allows for use by websites using HTML5 storage apis, for | |
30 // example an embedder may use 50% of the total volume size. | |
31 int64_t pool_size = 0; | |
32 | |
33 // The amount in bytes of the pool an individual site may consume. The | |
34 // value must be less than or equal to the pool_size. | |
35 int64_t per_host_quota = 0; | |
36 | |
37 // The amount of space that must remain available on the storage | |
38 // volume. As the volume approaches this limit, the quota system gets | |
39 // more aggressive about evicting data and disallowing new data. | |
40 int64_t must_remain_available = 0; | |
41 | |
42 // The quota system querries the embedder for the QuataSettings, | |
43 // but will rate limit the frequency of the querries to no more than once | |
44 // per refresh interval. | |
45 base::TimeDelta refresh_interval = base::TimeDelta::Max(); | |
46 }; | |
47 | |
48 // Function type used to return the settings in response to a | |
49 // GetQuotaSettingsFunc invocation. If the embedder cannot | |
50 // produce a settings values, base::nullopt can be returned. | |
51 using OptionalQuotaSettingsCallback = | |
52 base::Callback<void(base::Optional<QuotaSettings>)>; | |
53 | |
54 // Function type used to query the embedder about the quota manager settings. | |
55 // This function is invoked on the UI thread. | |
56 using GetQuotaSettingsFunc = | |
57 base::Callback<void(const OptionalQuotaSettingsCallback& callback)>; | |
58 | |
59 // Returns settings based on the size of the volume containing the storage | |
60 // partition and a guestimate of the size required for the OS. The refresh | |
61 // interval is 60 seconds to accomodate changes to the size of the volume. | |
62 // Except, in the case of incognito, the poolize and quota values are based | |
63 // on the amount of physical memory and the rerfresh interval is max'd out. | |
64 STORAGE_EXPORT | |
65 base::Optional<storage::QuotaSettings> CalculateNominalDynamicSettings( | |
66 const base::FilePath& partition_path, | |
67 bool is_incognito); | |
68 | |
69 // Returns settings with a poolsize of zero and no per host quota. | |
70 inline QuotaSettings GetNoQuotaSettings() { | |
71 return QuotaSettings(); | |
72 } | |
73 | |
74 // Returns settings that provide given |per_host_quota| and a total poolsize of | |
75 // five times that. | |
76 inline QuotaSettings GetHardCodedSettings(int64_t per_host_quota) { | |
77 return QuotaSettings(per_host_quota * 5, per_host_quota, per_host_quota); | |
78 } | |
79 | |
80 } // namespace storage | |
81 | |
82 #endif // STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_ | |
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