drm-lease-manager/main.c

   1 /* Copyright 2020-2021 IGEL Co., Ltd.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include "lease-manager.h"
  17 #include "lease-server.h"
  18 #include "log.h"
  19
  20 #include <assert.h>
  21 #include <getopt.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 static void usage(const char *progname)
  26 {
  27         printf("Usage: %s [OPTIONS] [<DRM device>]\n\n"
  28                "Options:\n"
  29                "-h, --help \tPrint this help\n"
  30                "-v, --verbose \tEnable verbose debug messages\n"
  31                "-t, --lease-transfer \tAllow lease transfter to new clients\n"
  32                "-k, --keep-on-crash \tDon't close lease on client crash\n",
  33                progname);
  34 }
  35
  36 const char *opts = "vtkh";
  37 const struct option options[] = {
  38     {"help", no_argument, NULL, 'h'},
  39     {"verbose", no_argument, NULL, 'v'},
  40     {"lease-transfer", no_argument, NULL, 't'},
  41     {"keep-on-crash", no_argument, NULL, 'k'},
  42     {NULL, 0, NULL, 0},
  43 };
  44
  45 int main(int argc, char **argv)
  46 {
  47         char *device = "/dev/dri/card0";
  48
  49         bool debug_log = false;
  50         bool can_transfer_leases = false;
  51         bool keep_on_crash = false;
  52
  53         int c;
  54         while ((c = getopt_long(argc, argv, opts, options, NULL)) != -1) {
  55                 int ret = EXIT_FAILURE;
  56                 switch (c) {
  57                 case 'v':
  58                         debug_log = true;
  59                         break;
  60                 case 't':
  61                         can_transfer_leases = true;
  62                         break;
  63                 case 'k':
  64                         keep_on_crash = true;
  65                         break;
  66                 case 'h':
  67                         ret = EXIT_SUCCESS;
  68                         /* fall through */
  69                 default:
  70                         usage(argv[0]);
  71                         return ret;
  72                 }
  73         }
  74
  75         if (optind < argc)
  76                 device = argv[optind];
  77
  78         dlm_log_enable_debug(debug_log);
  79
  80         struct lm *lm = lm_create(device);
  81         if (!lm) {
  82                 ERROR_LOG("DRM Lease initialization failed\n");
  83                 return EXIT_FAILURE;
  84         }
  85
  86         struct lease_handle **lease_handles = NULL;
  87         int count_ids = lm_get_lease_handles(lm, &lease_handles);
  88         assert(count_ids > 0);
  89
  90         struct ls *ls = ls_create(lease_handles, count_ids);
  91         if (!ls) {
  92                 lm_destroy(lm);
  93                 ERROR_LOG("Client socket initialization failed\n");
  94                 return EXIT_FAILURE;
  95         }
  96
  97         struct ls_req req;
  98         while (ls_get_request(ls, &req)) {
  99                 switch (req.type) {
 100                 case LS_REQ_GET_LEASE: {
 101                         int fd = lm_lease_grant(lm, req.lease_handle);
 102
 103                         if (fd < 0 && can_transfer_leases)
 104                                 fd = lm_lease_transfer(lm, req.lease_handle);
 105
 106                         if (fd < 0) {
 107                                 ERROR_LOG(
 108                                     "Can't fulfill lease request: lease=%s\n",
 109                                     req.lease_handle->name);
 110                                 ls_disconnect_client(ls, req.client);
 111                                 break;
 112                         }
 113
 114                         struct ls_client *active_client =
 115                             req.lease_handle->user_data;
 116                         if (active_client)
 117                                 ls_disconnect_client(ls, active_client);
 118
 119                         req.lease_handle->user_data = req.client;
 120
 121                         if (!ls_send_fd(ls, req.client, fd)) {
 122                                 ERROR_LOG(
 123                                     "Client communication error: lease=%s\n",
 124                                     req.lease_handle->name);
 125                                 ls_disconnect_client(ls, req.client);
 126                                 lm_lease_revoke(lm, req.lease_handle);
 127                         }
 128                         break;
 129                 }
 130                 case LS_REQ_RELEASE_LEASE:
 131                 case LS_REQ_CLIENT_DISCONNECT:
 132                         ls_disconnect_client(ls, req.client);
 133                         req.lease_handle->user_data = NULL;
 134                         lm_lease_revoke(lm, req.lease_handle);
 135
 136                         if (!keep_on_crash || req.type == LS_REQ_RELEASE_LEASE)
 137                                 lm_lease_close(req.lease_handle);
 138
 139                         break;
 140                 default:
 141                         ERROR_LOG("Internal error: Invalid lease request\n");
 142                         goto done;
 143                 }
 144         }
 145 done:
 146         ls_destroy(ls);
 147         lm_destroy(lm);
 148         return EXIT_FAILURE;
 149 }