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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 #include "storage/browser/quota/quota_settings.h" |
| 6 |
| 7 #include <algorithm> |
| 8 |
| 9 #include "base/metrics/histogram_macros.h" |
| 10 #include "base/sys_info.h" |
| 11 |
| 12 #define UMA_HISTOGRAM_MBYTES(name, sample) \ |
| 13 UMA_HISTOGRAM_CUSTOM_COUNTS((name), static_cast<int>((sample) / kMBytes), 1, \ |
| 14 10 * 1024 * 1024 /* 10TB */, 100) |
| 15 |
| 16 namespace storage { |
| 17 |
| 18 base::Optional<storage::QuotaSettings> CalculateNominalDynamicSettings( |
| 19 const base::FilePath& partition_path, |
| 20 bool is_incognito) { |
| 21 const int64_t kMBytes = 1024 * 1024; |
| 22 |
| 23 if (is_incognito) { |
| 24 storage::QuotaSettings settings; |
| 25 settings.pool_size = |
| 26 std::min(300 * kMBytes, base::SysInfo::AmountOfPhysicalMemory() / 10); |
| 27 settings.per_host_quota = settings.pool_size / 3; |
| 28 settings.refresh_interval = base::TimeDelta::Max(); |
| 29 return settings; |
| 30 } |
| 31 |
| 32 // The fraction of the device's storage the browser is willing to |
| 33 // use for temporary storage, this is applied after adjusting the |
| 34 // total to take os_accomodation into account. |
| 35 const double kTemporaryPoolSizeRatio = 1.0 / 3.0; // 33% |
| 36 |
| 37 // The fraction of the device's storage the browser attempts to |
| 38 // keep free. |
| 39 const double kShouldRemainAvailableRatio = 0.1; // 10% |
| 40 |
| 41 // The fraction of the device's storage the browser attempts to |
| 42 // keep free at all costs. |
| 43 const double kMustRemainAvailableRatio = 0.01; // 1% |
| 44 |
| 45 // Determines the portion of the temp pool that can be |
| 46 // utilized by a single host (ie. 5 for 20%). |
| 47 const int kPerHostTemporaryPortion = 5; |
| 48 |
| 49 // os_accomodation is an estimate of how much storage is needed for |
| 50 // the os and essential application code outside of the browser. |
| 51 const int64_t kDefaultOSAccomodation = |
| 52 #if defined(OS_ANDROID) |
| 53 1000 * kMBytes; |
| 54 #elif defined(OS_CHROMEOS) |
| 55 1000 * kMBytes; |
| 56 #elif defined(OS_WIN) || defined(OS_LINUX) || defined(OS_MACOSX) |
| 57 10000 * kMBytes; |
| 58 #else |
| 59 #error "Port: Need to define an OS accomodation value for unknown OS." |
| 60 #endif |
| 61 |
| 62 storage::QuotaSettings settings; |
| 63 |
| 64 int64_t total = base::SysInfo::AmountOfTotalDiskSpace(partition_path); |
| 65 if (total == -1) { |
| 66 LOG(ERROR) << "Unable to compute QuotaSettings."; |
| 67 return base::nullopt; |
| 68 } |
| 69 |
| 70 // If our hardcoded OS accomodation is too large for the volume size, define |
| 71 // the value as a fraction of the total volume size instead. |
| 72 int64_t os_accomodation = |
| 73 std::min(kDefaultOSAccomodation, static_cast<int64_t>(total * 0.8)); |
| 74 UMA_HISTOGRAM_MBYTES("Quota.OSAccomodationDelta", |
| 75 kDefaultOSAccomodation - os_accomodation); |
| 76 |
| 77 int64_t adjusted_total = total - os_accomodation; |
| 78 int64_t pool_size = adjusted_total * kTemporaryPoolSizeRatio; |
| 79 |
| 80 settings.pool_size = pool_size; |
| 81 settings.should_remain_available = total * kShouldRemainAvailableRatio; |
| 82 settings.must_remain_available = total * kMustRemainAvailableRatio; |
| 83 settings.per_host_quota = pool_size / kPerHostTemporaryPortion; |
| 84 settings.refresh_interval = base::TimeDelta::FromSeconds(60); |
| 85 return settings; |
| 86 } |
| 87 |
| 88 } // namespace |
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