rdma/rdma.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * rdma.c       RDMA tool
   4  * Authors:     Leon Romanovsky <leonro@mellanox.com>
   5  */
   6
   7 #include "rdma.h"
   8 #include "SNAPSHOT.h"
   9
  10 static void help(char *name)
  11 {
  12         pr_out("Usage: %s [ OPTIONS ] OBJECT { COMMAND | help }\n"
  13                "       %s [ -f[orce] ] -b[atch] filename\n"
  14                "where  OBJECT := { dev | link | resource | system | help }\n"
  15                "       OPTIONS := { -V[ersion] | -d[etails] | -j[son] | -p[retty]}\n", name, name);
  16 }
  17
  18 static int cmd_help(struct rd *rd)
  19 {
  20         help(rd->filename);
  21         return 0;
  22 }
  23
  24 static int rd_cmd(struct rd *rd, int argc, char **argv)
  25 {
  26         const struct rd_cmd cmds[] = {
  27                 { NULL,         cmd_help },
  28                 { "help",       cmd_help },
  29                 { "dev",        cmd_dev },
  30                 { "link",       cmd_link },
  31                 { "resource",   cmd_res },
  32                 { "system",     cmd_sys },
  33                 { 0 }
  34         };
  35
  36         rd->argc = argc;
  37         rd->argv = argv;
  38
  39         return rd_exec_cmd(rd, cmds, "object");
  40 }
  41
  42 static int rd_batch(struct rd *rd, const char *name, bool force)
  43 {
  44         char *line = NULL;
  45         size_t len = 0;
  46         int ret = 0;
  47
  48         if (name && strcmp(name, "-") != 0) {
  49                 if (!freopen(name, "r", stdin)) {
  50                         pr_err("Cannot open file \"%s\" for reading: %s\n",
  51                                name, strerror(errno));
  52                         return errno;
  53                 }
  54         }
  55
  56         cmdlineno = 0;
  57         while (getcmdline(&line, &len, stdin) != -1) {
  58                 char *largv[512];
  59                 int largc;
  60
  61                 largc = makeargs(line, largv, ARRAY_SIZE(largv));
  62                 if (!largc)
  63                         continue;       /* blank line */
  64
  65                 ret = rd_cmd(rd, largc, largv);
  66                 if (ret) {
  67                         pr_err("Command failed %s:%d\n", name, cmdlineno);
  68                         if (!force)
  69                                 break;
  70                 }
  71         }
  72
  73         free(line);
  74
  75         return ret;
  76 }
  77
  78 static int rd_init(struct rd *rd, char *filename)
  79 {
  80         uint32_t seq;
  81         int ret;
  82
  83         rd->filename = filename;
  84         INIT_LIST_HEAD(&rd->dev_map_list);
  85         INIT_LIST_HEAD(&rd->filter_list);
  86
  87         if (rd->json_output) {
  88                 rd->jw = jsonw_new(stdout);
  89                 if (!rd->jw) {
  90                         pr_err("Failed to create JSON writer\n");
  91                         return -ENOMEM;
  92                 }
  93                 jsonw_pretty(rd->jw, rd->pretty_output);
  94         }
  95
  96         rd->buff = malloc(MNL_SOCKET_BUFFER_SIZE);
  97         if (!rd->buff)
  98                 return -ENOMEM;
  99
 100         rd_prepare_msg(rd, RDMA_NLDEV_CMD_GET,
 101                        &seq, (NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP));
 102         ret = rd_send_msg(rd);
 103         if (ret)
 104                 return ret;
 105
 106         return rd_recv_msg(rd, rd_dev_init_cb, rd, seq);
 107 }
 108
 109 static void rd_cleanup(struct rd *rd)
 110 {
 111         if (rd->json_output)
 112                 jsonw_destroy(&rd->jw);
 113         rd_free(rd);
 114 }
 115
 116 int main(int argc, char **argv)
 117 {
 118         static const struct option long_options[] = {
 119                 { "version",            no_argument,            NULL, 'V' },
 120                 { "help",               no_argument,            NULL, 'h' },
 121                 { "json",               no_argument,            NULL, 'j' },
 122                 { "pretty",             no_argument,            NULL, 'p' },
 123                 { "details",            no_argument,            NULL, 'd' },
 124                 { "force",              no_argument,            NULL, 'f' },
 125                 { "batch",              required_argument,      NULL, 'b' },
 126                 { NULL, 0, NULL, 0 }
 127         };
 128         bool show_driver_details = false;
 129         const char *batch_file = NULL;
 130         bool pretty_output = false;
 131         bool show_details = false;
 132         bool json_output = false;
 133         bool force = false;
 134         struct rd rd = {};
 135         char *filename;
 136         int opt;
 137         int err;
 138
 139         filename = basename(argv[0]);
 140
 141         while ((opt = getopt_long(argc, argv, ":Vhdpjfb:",
 142                                   long_options, NULL)) >= 0) {
 143                 switch (opt) {
 144                 case 'V':
 145                         printf("%s utility, iproute2-ss%s\n",
 146                                filename, SNAPSHOT);
 147                         return EXIT_SUCCESS;
 148                 case 'p':
 149                         pretty_output = true;
 150                         break;
 151                 case 'd':
 152                         if (show_details)
 153                                 show_driver_details = true;
 154                         else
 155                                 show_details = true;
 156                         break;
 157                 case 'j':
 158                         json_output = true;
 159                         break;
 160                 case 'f':
 161                         force = true;
 162                         break;
 163                 case 'b':
 164                         batch_file = optarg;
 165                         break;
 166                 case 'h':
 167                         help(filename);
 168                         return EXIT_SUCCESS;
 169                 case ':':
 170                         pr_err("-%c option requires an argument\n", optopt);
 171                         return EXIT_FAILURE;
 172                 default:
 173                         pr_err("Unknown option.\n");
 174                         help(filename);
 175                         return EXIT_FAILURE;
 176                 }
 177         }
 178
 179         argc -= optind;
 180         argv += optind;
 181
 182         rd.show_details = show_details;
 183         rd.show_driver_details = show_driver_details;
 184         rd.json_output = json_output;
 185         rd.pretty_output = pretty_output;
 186
 187         err = rd_init(&rd, filename);
 188         if (err)
 189                 goto out;
 190
 191         if (batch_file)
 192                 err = rd_batch(&rd, batch_file, force);
 193         else
 194                 err = rd_cmd(&rd, argc, argv);
 195 out:
 196         /* Always cleanup */
 197         rd_cleanup(&rd);
 198         return err ? EXIT_FAILURE : EXIT_SUCCESS;
 199 }