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 | 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                 { 0 }
  33         };
  34
  35         rd->argc = argc;
  36         rd->argv = argv;
  37
  38         return rd_exec_cmd(rd, cmds, "object");
  39 }
  40
  41 static int rd_batch(struct rd *rd, const char *name, bool force)
  42 {
  43         char *line = NULL;
  44         size_t len = 0;
  45         int ret = 0;
  46
  47         if (name && strcmp(name, "-") != 0) {
  48                 if (!freopen(name, "r", stdin)) {
  49                         pr_err("Cannot open file \"%s\" for reading: %s\n",
  50                                name, strerror(errno));
  51                         return errno;
  52                 }
  53         }
  54
  55         cmdlineno = 0;
  56         while (getcmdline(&line, &len, stdin) != -1) {
  57                 char *largv[512];
  58                 int largc;
  59
  60                 largc = makeargs(line, largv, ARRAY_SIZE(largv));
  61                 if (!largc)
  62                         continue;       /* blank line */
  63
  64                 ret = rd_cmd(rd, largc, largv);
  65                 if (ret) {
  66                         pr_err("Command failed %s:%d\n", name, cmdlineno);
  67                         if (!force)
  68                                 break;
  69                 }
  70         }
  71
  72         free(line);
  73
  74         return ret;
  75 }
  76
  77 static int rd_init(struct rd *rd, char *filename)
  78 {
  79         uint32_t seq;
  80         int ret;
  81
  82         rd->filename = filename;
  83         INIT_LIST_HEAD(&rd->dev_map_list);
  84         INIT_LIST_HEAD(&rd->filter_list);
  85
  86         if (rd->json_output) {
  87                 rd->jw = jsonw_new(stdout);
  88                 if (!rd->jw) {
  89                         pr_err("Failed to create JSON writer\n");
  90                         return -ENOMEM;
  91                 }
  92                 jsonw_pretty(rd->jw, rd->pretty_output);
  93         }
  94
  95         rd->buff = malloc(MNL_SOCKET_BUFFER_SIZE);
  96         if (!rd->buff)
  97                 return -ENOMEM;
  98
  99         rd_prepare_msg(rd, RDMA_NLDEV_CMD_GET,
 100                        &seq, (NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP));
 101         ret = rd_send_msg(rd);
 102         if (ret)
 103                 return ret;
 104
 105         return rd_recv_msg(rd, rd_dev_init_cb, rd, seq);
 106 }
 107
 108 static void rd_cleanup(struct rd *rd)
 109 {
 110         if (rd->json_output)
 111                 jsonw_destroy(&rd->jw);
 112         rd_free(rd);
 113 }
 114
 115 int main(int argc, char **argv)
 116 {
 117         static const struct option long_options[] = {
 118                 { "version",            no_argument,            NULL, 'V' },
 119                 { "help",               no_argument,            NULL, 'h' },
 120                 { "json",               no_argument,            NULL, 'j' },
 121                 { "pretty",             no_argument,            NULL, 'p' },
 122                 { "details",            no_argument,            NULL, 'd' },
 123                 { "force",              no_argument,            NULL, 'f' },
 124                 { "batch",              required_argument,      NULL, 'b' },
 125                 { NULL, 0, NULL, 0 }
 126         };
 127         bool show_driver_details = false;
 128         const char *batch_file = NULL;
 129         bool pretty_output = false;
 130         bool show_details = false;
 131         bool json_output = false;
 132         bool force = false;
 133         struct rd rd = {};
 134         char *filename;
 135         int opt;
 136         int err;
 137
 138         filename = basename(argv[0]);
 139
 140         while ((opt = getopt_long(argc, argv, ":Vhdpjfb:",
 141                                   long_options, NULL)) >= 0) {
 142                 switch (opt) {
 143                 case 'V':
 144                         printf("%s utility, iproute2-ss%s\n",
 145                                filename, SNAPSHOT);
 146                         return EXIT_SUCCESS;
 147                 case 'p':
 148                         pretty_output = true;
 149                         break;
 150                 case 'd':
 151                         if (show_details)
 152                                 show_driver_details = true;
 153                         else
 154                                 show_details = true;
 155                         break;
 156                 case 'j':
 157                         json_output = true;
 158                         break;
 159                 case 'f':
 160                         force = true;
 161                         break;
 162                 case 'b':
 163                         batch_file = optarg;
 164                         break;
 165                 case 'h':
 166                         help(filename);
 167                         return EXIT_SUCCESS;
 168                 case ':':
 169                         pr_err("-%c option requires an argument\n", optopt);
 170                         return EXIT_FAILURE;
 171                 default:
 172                         pr_err("Unknown option.\n");
 173                         help(filename);
 174                         return EXIT_FAILURE;
 175                 }
 176         }
 177
 178         argc -= optind;
 179         argv += optind;
 180
 181         rd.show_details = show_details;
 182         rd.show_driver_details = show_driver_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 }