src/helper/helper-net-cls.c

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
   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 <dirent.h>
  18 #include <glib.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22
  23 #include "helper-cgroup.h"
  24 #include "counter.h"
  25 #include "stc-db.h"
  26 #include "helper-file.h"
  27 #include "helper-net-cls.h"
  28
  29 #define CUR_CLASSID_PATH   "/var/lib/stc/cur_classid"
  30 #define CLASSID_FILE_NAME "net_cls.classid"
  31
  32 typedef GArray task_classid_array;
  33
  34 static uint32_t __produce_classid(check_classid_used_cb check_classid_cb)
  35 {
  36         uint32_t classid = STC_RESERVED_CLASSID_MAX;
  37         int ret = fread_uint(CUR_CLASSID_PATH, &classid);
  38         if (ret < 0)
  39                 STC_LOGI("Can not read current classid"); //LCOV_EXCL_LINE
  40
  41         classid += 1;
  42
  43         if (check_classid_cb) {
  44                 int classid_test_count = 0;
  45                 for (classid_test_count = 0; classid_test_count < INT32_MAX;
  46                      ++classid) {
  47                         if (!check_classid_cb(classid))
  48                                 break;
  49                 }
  50         }
  51
  52         ret = fwrite_uint(CUR_CLASSID_PATH, ++classid);
  53         if (ret < 0)
  54                 STC_LOGE("Can not write classid"); //LCOV_EXCL_LINE
  55
  56         return classid;
  57 }
  58
  59 static int __place_classid_to_cgroup(const char *cgroup, const char *subdir,
  60                                      uint32_t *classid,
  61                                      check_classid_used_cb cb)
  62 {
  63         char buf[MAX_PATH_LENGTH];
  64         uint32_t result_classid = (classid && *classid) ? *classid :
  65                 __produce_classid(cb);
  66
  67         /* set classid as out argument */
  68         if (classid && !*classid)
  69                 *classid = result_classid;
  70
  71         snprintf(buf, sizeof(buf), "%s/%s", cgroup, subdir);
  72         return cgroup_write_node_uint32(buf, CLASSID_FILE_NAME, result_classid);
  73 }
  74
  75 static stc_error_e __get_classid_from_cgroup(const char *cgroup,
  76                                           const char *subdir, uint32_t *classid)
  77 {
  78         char buf[MAX_PATH_LENGTH];
  79         snprintf(buf, sizeof(buf), "%s/%s", cgroup, subdir);
  80
  81         int ret = cgroup_read_node_uint32(buf, CLASSID_FILE_NAME, classid);
  82         if (ret < 0) {
  83                 *classid = STC_UNKNOWN_CLASSID;
  84                 return STC_ERROR_NO_DATA;
  85         }
  86
  87         return STC_ERROR_NONE;
  88 }
  89
  90 API stc_error_e init_current_classid(void)
  91 {
  92         int ret = 0;
  93         struct stat stat_buf;
  94
  95         if (stat(STC_CGROUP_NETWORK, &stat_buf) != 0) {
  96                 uint32_t classid = STC_RESERVED_CLASSID_MAX;
  97                 ret = fwrite_uint(CUR_CLASSID_PATH, classid);
  98                 if (ret < 0) {
  99                         STC_LOGE("Can not init current classid"); //LCOV_EXCL_LINE
 100                         return STC_ERROR_FAIL; //LCOV_EXCL_LINE
 101                 }
 102         }
 103
 104         return STC_ERROR_NONE;
 105 }
 106
 107 API uint32_t get_classid_by_app_id(const char *app_id, int create)
 108 {
 109         bool exists;
 110         int ret = STC_ERROR_NONE;
 111         uint32_t classid = STC_UNKNOWN_CLASSID;
 112         const char *path_to_net_cgroup_dir = NULL;
 113
 114         if (app_id == NULL) {
 115                 STC_LOGE("app_id must be not empty"); //LCOV_EXCL_LINE
 116                 return STC_UNKNOWN_CLASSID; //LCOV_EXCL_LINE
 117         }
 118
 119         if (!strcmp(app_id, STC_TOTAL_BACKGROUND))
 120                 return STC_BACKGROUND_APP_CLASSID;
 121
 122         if (!strcmp(app_id, STC_TOTAL_DATACALL))
 123                 return STC_TOTAL_DATACALL_CLASSID;
 124
 125         if (!strcmp(app_id, STC_TOTAL_WIFI))
 126                 return STC_TOTAL_WIFI_CLASSID;
 127
 128         if (!strcmp(app_id, STC_TOTAL_BLUETOOTH))
 129                 return STC_TOTAL_BLUETOOTH_CLASSID;
 130
 131         if (!strcmp(app_id, STC_TOTAL_IPV4))
 132                 return STC_TOTAL_IPV4_CLASSID;
 133
 134         if (!strcmp(app_id, STC_TOTAL_IPV6))
 135                 return STC_TOTAL_IPV6_CLASSID;
 136
 137         if (!strcmp(app_id, STC_TOTAL_TETHERING))
 138                 return STC_TETHERING_APP_CLASSID;
 139
 140         if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 141                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 142         else if (strstr(app_id, STC_TETHERING_APP_SUFFIX))
 143                 path_to_net_cgroup_dir = TETHERING_CGROUP_NETWORK;
 144         else
 145                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK;
 146
 147         /* just read */
 148         if (!create)
 149                 ret = __get_classid_from_cgroup(path_to_net_cgroup_dir, //LCOV_EXCL_LINE
 150                                                         app_id, &classid);
 151
 152         if (ret != STC_ERROR_NONE)
 153                 return STC_UNKNOWN_CLASSID;
 154
 155         if (classid != STC_UNKNOWN_CLASSID)
 156                 return classid;
 157
 158         ret = cgroup_make_subdir(path_to_net_cgroup_dir, (char *)app_id,
 159                                  &exists);
 160         if (ret)
 161                 goto handle_error;
 162
 163         if (exists)
 164                 ret = __get_classid_from_cgroup(path_to_net_cgroup_dir,
 165                                                     app_id, &classid);
 166         else
 167                 ret = __place_classid_to_cgroup(path_to_net_cgroup_dir,
 168                                                 (char *)app_id, &classid, NULL);
 169         if (ret)
 170                 goto handle_error; //LCOV_EXCL_LINE
 171
 172         return classid;
 173
 174 handle_error:
 175         if (STC_DEBUG_LOG)
 176                 STC_LOGE("error_code: [%d]", ret); //LCOV_EXCL_LINE
 177         return STC_UNKNOWN_CLASSID; //LCOV_EXCL_LINE
 178 }
 179
 180 API stc_error_e place_pids_to_net_cgroup(const int pid, const char *app_id)
 181 {
 182         char child_buf[21 + MAX_DEC_SIZE(int) + MAX_DEC_SIZE(int) + 1];
 183         const char *path_to_net_cgroup_dir = NULL;
 184
 185         snprintf(child_buf, sizeof(child_buf), PROC_TASK_CHILDREN, pid, pid);
 186
 187         if (app_id == NULL) {
 188                 STC_LOGE("package name must be not empty"); //LCOV_EXCL_LINE
 189                 return STC_ERROR_INVALID_PARAMETER; //LCOV_EXCL_LINE
 190         }
 191
 192         if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 193                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 194         else if (strstr(app_id, STC_TETHERING_APP_SUFFIX))
 195                 path_to_net_cgroup_dir = TETHERING_CGROUP_NETWORK;
 196         else
 197                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK; //LCOV_EXCL_LINE
 198
 199         if (access(child_buf, F_OK))
 200                 return cgroup_write_pid(path_to_net_cgroup_dir, app_id, pid);
 201
 202         return cgroup_write_pidtree(path_to_net_cgroup_dir, app_id, pid); //LCOV_EXCL_LINE
 203 }