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 uint32_t __get_classid_from_cgroup(const char *cgroup,
  76                                           const char *subdir)
  77 {
  78         char buf[MAX_PATH_LENGTH];
  79         uint32_t classid = STC_UNKNOWN_CLASSID;
  80         snprintf(buf, sizeof(buf), "%s/%s", cgroup, subdir);
  81
  82         int ret = cgroup_read_node_uint32(buf, CLASSID_FILE_NAME, &classid);
  83         if (ret < 0)
  84                 STC_LOGE("Can't read classid from cgroup %s", buf); //LCOV_EXCL_LINE
  85         return classid;
  86 }
  87
  88 stc_error_e init_current_classid(void)
  89 {
  90         int ret = 0;
  91         struct stat stat_buf;
  92
  93         if (stat(STC_CGROUP_NETWORK, &stat_buf) != 0) {
  94                 uint32_t classid = STC_RESERVED_CLASSID_MAX;
  95                 ret = fwrite_uint(CUR_CLASSID_PATH, classid);
  96                 if (ret < 0) {
  97                         STC_LOGE("Can not init current classid"); //LCOV_EXCL_LINE
  98                         return STC_ERROR_FAIL; //LCOV_EXCL_LINE
  99                 }
 100         }
 101
 102         return STC_ERROR_NONE;
 103 }
 104
 105 uint32_t get_classid_by_app_id(const char *app_id, int create)
 106 {
 107         int ret = 0;
 108         bool exists;
 109         uint32_t classid = STC_UNKNOWN_CLASSID;
 110         const char *path_to_net_cgroup_dir = NULL;
 111
 112         if (app_id == NULL) {
 113                 STC_LOGE("app_id must be not empty"); //LCOV_EXCL_LINE
 114                 return STC_UNKNOWN_CLASSID; //LCOV_EXCL_LINE
 115         }
 116
 117         if (!strcmp(app_id, STC_BACKGROUND_APP_ID))
 118                 return STC_BACKGROUND_APP_CLASSID;
 119
 120         if (!strcmp(app_id, STC_TOTAL_DATACALL))
 121                 return STC_TOTAL_DATACALL_CLASSID;
 122
 123         if (!strcmp(app_id, STC_TOTAL_WIFI))
 124                 return STC_TOTAL_WIFI_CLASSID;
 125
 126         if (!strcmp(app_id, STC_TOTAL_BLUETOOTH))
 127                 return STC_TOTAL_BLUETOOTH_CLASSID;
 128
 129         if (!strcmp(app_id, STC_TOTAL_IPV4))
 130                 return STC_TOTAL_IPV4_CLASSID;
 131
 132         if (!strcmp(app_id, STC_TOTAL_IPV6))
 133                 return STC_TOTAL_IPV6_CLASSID;
 134
 135         if (!strcmp(app_id, STC_TOTAL_TETHERING))
 136                 return STC_TETHERING_APP_CLASSID;
 137
 138         if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 139                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 140         else if (strstr(app_id, STC_TETHERING_APP_SUFFIX))
 141                 path_to_net_cgroup_dir = TETHERING_CGROUP_NETWORK;
 142         else
 143                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK;
 144
 145         /* just read */
 146         if (!create)
 147                 classid = __get_classid_from_cgroup(path_to_net_cgroup_dir, //LCOV_EXCL_LINE
 148                                                     app_id);
 149
 150         if (classid != STC_UNKNOWN_CLASSID)
 151                 return classid;
 152
 153         ret = cgroup_make_subdir(path_to_net_cgroup_dir, (char *)app_id,
 154                                  &exists);
 155         if (ret)
 156                 goto handle_error;
 157
 158         if (exists)
 159                 classid = __get_classid_from_cgroup(path_to_net_cgroup_dir,
 160                                                     app_id);
 161         else
 162                 ret = __place_classid_to_cgroup(path_to_net_cgroup_dir,
 163                                                 (char *)app_id, &classid, NULL);
 164         if (ret)
 165                 goto handle_error; //LCOV_EXCL_LINE
 166
 167         return classid;
 168
 169 handle_error:
 170
 171         STC_LOGE("error_code: [%d]", ret); //LCOV_EXCL_LINE
 172         return STC_UNKNOWN_CLASSID; //LCOV_EXCL_LINE
 173 }
 174
 175 stc_error_e place_pids_to_net_cgroup(const int pid, const char *app_id)
 176 {
 177         char child_buf[21 + MAX_DEC_SIZE(int) + MAX_DEC_SIZE(int) + 1];
 178         const char *path_to_net_cgroup_dir = NULL;
 179
 180         snprintf(child_buf, sizeof(child_buf), PROC_TASK_CHILDREN, pid, pid);
 181
 182         if (app_id == NULL) {
 183                 STC_LOGE("package name must be not empty"); //LCOV_EXCL_LINE
 184                 return STC_ERROR_INVALID_PARAMETER; //LCOV_EXCL_LINE
 185         }
 186
 187         if (!strcmp(app_id, STC_BACKGROUND_APP_ID))
 188                 path_to_net_cgroup_dir = STC_CGROUP_NETWORK;
 189         else if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 190                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 191         else if (strstr(app_id, STC_TETHERING_APP_SUFFIX))
 192                 path_to_net_cgroup_dir = TETHERING_CGROUP_NETWORK;
 193         else
 194                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK; //LCOV_EXCL_LINE
 195
 196         if (access(child_buf, F_OK))
 197                 return cgroup_write_pid(path_to_net_cgroup_dir, app_id, pid);
 198
 199         return cgroup_write_pidtree(path_to_net_cgroup_dir, app_id, pid); //LCOV_EXCL_LINE
 200 }