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-config.h"
  17 #include "lease-manager.h"
  18 #include "lease-server.h"
  19 #include "log.h"
  20
  21 #include <assert.h>
  22 #include <getopt.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 static void usage(const char *progname)
  27 {
  28         printf("Usage: %s [OPTIONS] [<DRM device>]\n\n"
  29                "Options:\n"
  30                "-h, --help \tPrint this help\n"
  31                "-c, --config \t path to configuration file (default "
  32                "/etc/drm-lease-manager.toml)\n"
  33                "-v, --verbose \tEnable verbose debug messages\n"
  34                "-t, --lease-transfer \tAllow lease transfter to new clients\n"
  35                "-k, --keep-on-crash \tDon't close lease on client crash\n",
  36                progname);
  37 }
  38
  39 const char *opts = "vtkhc:";
  40 const struct option options[] = {
  41     {"help", no_argument, NULL, 'h'},
  42     {"verbose", no_argument, NULL, 'v'},
  43     {"lease-transfer", no_argument, NULL, 't'},
  44     {"keep-on-crash", no_argument, NULL, 'k'},
  45     {"config", required_argument, NULL, 'c'},
  46     {NULL, 0, NULL, 0},
  47 };
  48
  49 int main(int argc, char **argv)
  50 {
  51         char *device = "/dev/dri/card0";
  52         char *config_file = "/etc/drm-lease-manager.toml";
  53
  54         bool debug_log = false;
  55         bool can_transfer_leases = false;
  56         bool keep_on_crash = false;
  57
  58         int c;
  59         while ((c = getopt_long(argc, argv, opts, options, NULL)) != -1) {
  60                 int ret = EXIT_FAILURE;
  61                 switch (c) {
  62                 case 'v':
  63                         debug_log = true;
  64                         break;
  65                 case 't':
  66                         can_transfer_leases = true;
  67                         break;
  68                 case 'k':
  69                         keep_on_crash = true;
  70                         break;
  71                 case 'c':
  72                         config_file = optarg;
  73                         break;
  74                 case 'h':
  75                         ret = EXIT_SUCCESS;
  76                         /* fall through */
  77                 default:
  78                         usage(argv[0]);
  79                         return ret;
  80                 }
  81         }
  82
  83         if (optind < argc)
  84                 device = argv[optind];
  85
  86         dlm_log_enable_debug(debug_log);
  87
  88         struct lease_config *lease_configs = NULL;
  89         int num_configs = parse_config(config_file, &lease_configs);
  90
  91         struct lm *lm =
  92             lm_create_with_config(device, num_configs, lease_configs);
  93
  94         if (!lm) {
  95                 ERROR_LOG("DRM Lease initialization failed\n");
  96                 return EXIT_FAILURE;
  97         }
  98
  99         struct lease_handle **lease_handles = NULL;
 100         int count_ids = lm_get_lease_handles(lm, &lease_handles);
 101         assert(count_ids > 0);
 102
 103         struct ls *ls = ls_create(lease_handles, count_ids);
 104         if (!ls) {
 105                 lm_destroy(lm);
 106                 ERROR_LOG("Client socket initialization failed\n");
 107                 return EXIT_FAILURE;
 108         }
 109
 110         struct ls_req req;
 111         while (ls_get_request(ls, &req)) {
 112                 switch (req.type) {
 113                 case LS_REQ_GET_LEASE: {
 114                         int fd = lm_lease_grant(lm, req.lease_handle);
 115
 116                         if (fd < 0 && can_transfer_leases)
 117                                 fd = lm_lease_transfer(lm, req.lease_handle);
 118
 119                         if (fd < 0) {
 120                                 ERROR_LOG(
 121                                     "Can't fulfill lease request: lease=%s\n",
 122                                     req.lease_handle->name);
 123                                 ls_disconnect_client(ls, req.client);
 124                                 break;
 125                         }
 126
 127                         struct ls_client *active_client =
 128                             req.lease_handle->user_data;
 129                         if (active_client)
 130                                 ls_disconnect_client(ls, active_client);
 131
 132                         req.lease_handle->user_data = req.client;
 133
 134                         if (!ls_send_fd(ls, req.client, fd)) {
 135                                 ERROR_LOG(
 136                                     "Client communication error: lease=%s\n",
 137                                     req.lease_handle->name);
 138                                 ls_disconnect_client(ls, req.client);
 139                                 lm_lease_revoke(lm, req.lease_handle);
 140                         }
 141                         break;
 142                 }
 143                 case LS_REQ_RELEASE_LEASE:
 144                 case LS_REQ_CLIENT_DISCONNECT:
 145                         ls_disconnect_client(ls, req.client);
 146                         req.lease_handle->user_data = NULL;
 147                         lm_lease_revoke(lm, req.lease_handle);
 148
 149                         if (!keep_on_crash || req.type == LS_REQ_RELEASE_LEASE)
 150                                 lm_lease_close(req.lease_handle);
 151
 152                         break;
 153                 default:
 154                         ERROR_LOG("Internal error: Invalid lease request\n");
 155                         goto done;
 156                 }
 157         }
 158 done:
 159         ls_destroy(ls);
 160         lm_destroy(lm);
 161         release_config(num_configs, lease_configs);
 162         return EXIT_FAILURE;
 163 }