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 "/tmp/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");
  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");
  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);
  85         return classid;
  86 }
  87
  88 uint32_t get_classid_by_app_id(const char *app_id, int create)
  89 {
  90         int ret = 0;
  91         bool exists;
  92         uint32_t classid = STC_UNKNOWN_CLASSID;
  93         const char *path_to_net_cgroup_dir = NULL;
  94
  95         if (app_id == NULL) {
  96                 STC_LOGE("app_id must be not empty");
  97                 return STC_UNKNOWN_CLASSID;
  98         }
  99
 100         if (!strcmp(app_id, STC_BACKGROUND_APP_ID))
 101                 return STC_BACKGROUND_APP_CLASSID;
 102
 103         if (!strcmp(app_id, STC_TOTAL_DATACALL))
 104                 return STC_TOTAL_DATACALL_CLASSID;
 105
 106         if (!strcmp(app_id, STC_TOTAL_WIFI))
 107                 return STC_TOTAL_WIFI_CLASSID;
 108
 109         if (!strcmp(app_id, STC_TOTAL_BLUETOOTH))
 110                 return STC_TOTAL_BLUETOOTH_CLASSID;
 111
 112         if (!strcmp(app_id, STC_TOTAL_IPV4))
 113                 return STC_TOTAL_IPV4_CLASSID;
 114
 115         if (!strcmp(app_id, STC_TOTAL_IPV6))
 116                 return STC_TOTAL_IPV6_CLASSID;
 117
 118         if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 119                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 120         else
 121                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK;
 122
 123         /* just read */
 124         if (!create)
 125                 classid = __get_classid_from_cgroup(path_to_net_cgroup_dir,
 126                                                     app_id);
 127
 128         if (classid != STC_UNKNOWN_CLASSID)
 129                 return classid;
 130
 131         ret = cgroup_make_subdir(path_to_net_cgroup_dir, (char *)app_id,
 132                                  &exists);
 133         if (ret)
 134                 goto handle_error;
 135
 136         if (exists)
 137                 classid = __get_classid_from_cgroup(path_to_net_cgroup_dir,
 138                                                     app_id);
 139         else
 140                 ret = __place_classid_to_cgroup(path_to_net_cgroup_dir,
 141                                                 (char *)app_id, &classid, NULL);
 142         if (ret)
 143                 goto handle_error;
 144
 145         return classid;
 146
 147 handle_error:
 148
 149         STC_LOGE("error_code: [%d]", ret);
 150         return STC_UNKNOWN_CLASSID;
 151 }
 152
 153 stc_error_e place_pids_to_net_cgroup(const int pid, const char *app_id)
 154 {
 155         char child_buf[21 + MAX_DEC_SIZE(int) + MAX_DEC_SIZE(int)];
 156         const char *path_to_net_cgroup_dir = NULL;
 157
 158         snprintf(child_buf, sizeof(child_buf), PROC_TASK_CHILDREN, pid, pid);
 159
 160         if (app_id == NULL) {
 161                 STC_LOGE("package name must be not empty");
 162                 return STC_ERROR_INVALID_PARAMETER;
 163         }
 164
 165         if (!strcmp(app_id, STC_BACKGROUND_APP_ID))
 166                 path_to_net_cgroup_dir = STC_CGROUP_NETWORK;
 167         else if (strstr(app_id, STC_BACKGROUND_APP_SUFFIX))
 168                 path_to_net_cgroup_dir = BACKGROUND_CGROUP_NETWORK;
 169         else
 170                 path_to_net_cgroup_dir = FOREGROUND_CGROUP_NETWORK;
 171
 172         if (access(child_buf, F_OK)) {
 173                 STC_LOGD("%s of %s is not existed", child_buf, app_id);
 174                 return cgroup_write_pid(path_to_net_cgroup_dir, app_id, pid);
 175         }
 176
 177         return cgroup_write_pidtree(path_to_net_cgroup_dir, app_id, pid);
 178 }