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
|
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "QuotaUtils.h"
#include <fstream>
#include <unordered_map>
#include <sys/quota.h>
#include <android-base/logging.h>
#include "utils.h"
namespace android {
namespace installd {
namespace {
std::recursive_mutex mMountsLock;
/* Map of all quota mounts from target to source */
std::unordered_map<std::string, std::string> mQuotaReverseMounts;
std::string FindQuotaDeviceForUuid(const std::string& uuid) {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
auto path = create_data_path(uuid.empty() ? nullptr : uuid.c_str());
return mQuotaReverseMounts[path];
}
} // namespace
bool InvalidateQuotaMounts() {
std::lock_guard<std::recursive_mutex> lock(mMountsLock);
mQuotaReverseMounts.clear();
std::ifstream in("/proc/mounts");
if (!in.is_open()) {
return false;
}
std::string source;
std::string target;
std::string ignored;
while (!in.eof()) {
std::getline(in, source, ' ');
std::getline(in, target, ' ');
std::getline(in, ignored);
if (target.compare(0, 13, "/data_mirror/") == 0) {
continue;
}
if (source.compare(0, 11, "/dev/block/") == 0) {
struct dqblk dq;
if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), source.c_str(), 0,
reinterpret_cast<char*>(&dq)) == 0) {
LOG(DEBUG) << "Found quota mount " << source << " at " << target;
mQuotaReverseMounts[target] = source;
}
}
}
return true;
}
bool IsQuotaSupported(const std::string& uuid) {
return !FindQuotaDeviceForUuid(uuid).empty();
}
int64_t GetOccupiedSpaceForUid(const std::string& uuid, uid_t uid) {
const std::string device = FindQuotaDeviceForUuid(uuid);
if (device == "") {
return -1;
}
struct dqblk dq;
if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device.c_str(), uid,
reinterpret_cast<char*>(&dq)) != 0) {
if (errno != ESRCH) {
PLOG(ERROR) << "Failed to quotactl " << device << " for UID " << uid;
}
return -1;
} else {
#if MEASURE_DEBUG
LOG(DEBUG) << "quotactl() for UID " << uid << " " << dq.dqb_curspace;
#endif
return dq.dqb_curspace;
}
}
int64_t GetOccupiedSpaceForProjectId(const std::string& uuid, int projectId) {
const std::string device = FindQuotaDeviceForUuid(uuid);
if (device == "") {
return -1;
}
struct dqblk dq;
if (quotactl(QCMD(Q_GETQUOTA, PRJQUOTA), device.c_str(), projectId,
reinterpret_cast<char*>(&dq)) != 0) {
if (errno != ESRCH) {
PLOG(ERROR) << "Failed to quotactl " << device << " for Project ID " << projectId;
}
return -1;
} else {
#if MEASURE_DEBUG
LOG(DEBUG) << "quotactl() for Project ID " << projectId << " " << dq.dqb_curspace;
#endif
return dq.dqb_curspace;
}
}
int64_t GetOccupiedSpaceForGid(const std::string& uuid, gid_t gid) {
const std::string device = FindQuotaDeviceForUuid(uuid);
if (device == "") {
return -1;
}
struct dqblk dq;
if (quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), device.c_str(), gid,
reinterpret_cast<char*>(&dq)) != 0) {
if (errno != ESRCH) {
PLOG(ERROR) << "Failed to quotactl " << device << " for GID " << gid;
}
return -1;
} else {
#if MEASURE_DEBUG
LOG(DEBUG) << "quotactl() for GID " << gid << " " << dq.dqb_curspace;
#endif
return dq.dqb_curspace;
}
}
} // namespace installd
} // namespace android
|
