Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 | #include <errno.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <getopt.h> |
| 20 | #include <linux/dm-ioctl.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <android-base/unique_fd.h> |
| 26 | #include <dm.h> |
| 27 | |
| 28 | #include <functional> |
| 29 | #include <iomanip> |
| 30 | #include <ios> |
| 31 | #include <iostream> |
| 32 | #include <map> |
| 33 | #include <string> |
| 34 | #include <vector> |
| 35 | |
| 36 | using DeviceMapper = ::android::dm::DeviceMapper; |
| 37 | using DmTarget = ::android::dm::DmTarget; |
| 38 | |
| 39 | static int Usage(void) { |
| 40 | std::cerr << "usage: dmctl <command> [command options]"; |
| 41 | std::cerr << "commands:"; |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 42 | std::cerr << " create <dm-name> [dm-target> [-lo <filename>] <dm-target-args>]"; |
| 43 | std::cerr, " delete <dm-name>"; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 44 | std::cerr, " list"; |
| 45 | std::cerr, " help"; |
| 46 | return -EINVAL; |
| 47 | } |
| 48 | |
| 49 | static int DmCreateCmdHandler(int argc, char** argv) { |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 50 | if (argc < 1) { |
| 51 | std::cerr << "DmCreateCmdHandler: atleast 'name' MUST be provided for target device"; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 52 | return -EINVAL; |
| 53 | } |
| 54 | |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 55 | std::string name = argv[0]; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 56 | DeviceMapper& dm = DeviceMapper::Instance(); |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 57 | if (!dm.CreateDevice(name)) { |
| 58 | std::cerr << "DmCreateCmdHandler: Failed to create " << name << " device"; |
| 59 | return -EIO; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 60 | } |
| 61 | |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 62 | // if we also have target specified |
| 63 | if (argc > 1) { |
| 64 | // fall through for now. This will eventually create a DmTarget() based on the target name |
| 65 | // passing it the table that is specified at the command line |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 66 | } |
| 67 | |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 68 | return 0; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | static int DmDeleteCmdHandler(int argc, char** argv) { |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 72 | if (argc < 1) { |
| 73 | std::cerr << "DmCreateCmdHandler: atleast 'name' MUST be provided for target device"; |
| 74 | return -EINVAL; |
| 75 | } |
| 76 | |
| 77 | std::string name = argv[0]; |
| 78 | DeviceMapper& dm = DeviceMapper::Instance(); |
| 79 | if (!dm.DeleteDevice(name)) { |
| 80 | std::cerr << "DmCreateCmdHandler: Failed to create " << name << " device"; |
| 81 | return -EIO; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static int DmListCmdHandler(int /* argc */, char** /* argv */) { |
| 88 | std::cout << "Available Device Mapper Targets:" << std::endl; |
| 89 | |
| 90 | DeviceMapper& dm = DeviceMapper::Instance(); |
| 91 | std::vector<DmTarget> targets; |
| 92 | if (!dm.GetAvailableTargets(&targets)) { |
Sandeep Patil | 45d94ab | 2018-06-12 17:03:56 -0700 | [diff] [blame^] | 93 | std::cerr << "Failed to read available device mapper targets" << std::endl; |
Sandeep Patil | 59f04ee | 2018-05-30 13:46:55 -0700 | [diff] [blame] | 94 | return -errno; |
| 95 | } |
| 96 | |
| 97 | if (targets.empty()) { |
| 98 | std::cout << " <empty>" << std::endl; |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | for (const auto& target : targets) { |
| 103 | std::cout << std::left << std::setw(20) << target.name() << " : " << target.version() |
| 104 | << std::endl; |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static int HelpCmdHandler(int /* argc */, char** /* argv */) { |
| 111 | Usage(); |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static std::map<std::string, std::function<int(int, char**)>> cmdmap = { |
| 116 | {"create", DmCreateCmdHandler}, |
| 117 | {"delete", DmDeleteCmdHandler}, |
| 118 | {"list", DmListCmdHandler}, |
| 119 | {"help", HelpCmdHandler}, |
| 120 | }; |
| 121 | |
| 122 | int main(int argc, char** argv) { |
| 123 | android::base::InitLogging(argv, &android::base::StderrLogger); |
| 124 | if (argc < 2) { |
| 125 | return Usage(); |
| 126 | } |
| 127 | |
| 128 | for (const auto& cmd : cmdmap) { |
| 129 | if (cmd.first == argv[1]) { |
| 130 | return cmd.second(argc - 2, argv + 2); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | return Usage(); |
| 135 | } |