rdma/rdma.c

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