ip/iplink_ipoib.c

   1 /*
   2  * iplink_ipoib.c       IPoIB device support
   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:     Or Gerlitz <ogerlitz@mellanox.com>
  10  *              copied iflink_vlan.c authored by Patrick McHardy <kaber@trash.net>
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <linux/if_link.h>
  17
  18 #include "rt_names.h"
  19 #include "utils.h"
  20 #include "ip_common.h"
  21
  22 static void print_explain(FILE *f)
  23 {
  24         fprintf(f,
  25                 "Usage: ... ipoib [ pkey PKEY ]\n"
  26                 "                 [ mode {datagram | connected} ]\n"
  27                 "                 [ umcast {0|1} ]\n"
  28                 "\n"
  29                 "PKEY  := 0x8001-0xffff\n"
  30         );
  31 }
  32
  33 static void explain(void)
  34 {
  35         print_explain(stderr);
  36 }
  37
  38 static int mode_arg(void)
  39 {
  40         fprintf(stderr, "Error: argument of \"mode\" must be \"datagram\"or \"connected\"\n");
  41         return -1;
  42 }
  43
  44 static int ipoib_parse_opt(struct link_util *lu, int argc, char **argv,
  45                           struct nlmsghdr *n)
  46 {
  47         __u16 pkey, mode, umcast;
  48
  49         while (argc > 0) {
  50                 if (matches(*argv, "pkey") == 0) {
  51                         NEXT_ARG();
  52                         if (get_u16(&pkey, *argv, 0))
  53                                 invarg("pkey is invalid", *argv);
  54                         addattr_l(n, 1024, IFLA_IPOIB_PKEY, &pkey, 2);
  55                 } else if (matches(*argv, "mode") == 0) {
  56                         NEXT_ARG();
  57                         if (strcmp(*argv, "datagram") == 0)
  58                                 mode = IPOIB_MODE_DATAGRAM;
  59                         else if (strcmp(*argv, "connected") == 0)
  60                                 mode = IPOIB_MODE_CONNECTED;
  61                         else
  62                                 return mode_arg();
  63                         addattr_l(n, 1024, IFLA_IPOIB_MODE, &mode, 2);
  64                 } else if (matches(*argv, "umcast") == 0) {
  65                         NEXT_ARG();
  66                         if (get_u16(&umcast, *argv, 0))
  67                                 invarg("umcast is invalid", *argv);
  68                         addattr_l(n, 1024, IFLA_IPOIB_UMCAST, &umcast, 2);
  69                 } else if (matches(*argv, "help") == 0) {
  70                         explain();
  71                         return -1;
  72                 } else {
  73                         fprintf(stderr, "ipoib: unknown option \"%s\"?\n", *argv);
  74                         explain();
  75                         return -1;
  76                 }
  77                 argc--, argv++;
  78         }
  79
  80         return 0;
  81 }
  82
  83 static void ipoib_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  84 {
  85         __u16 mode;
  86
  87         if (!tb)
  88                 return;
  89
  90         if (!tb[IFLA_IPOIB_PKEY] ||
  91             RTA_PAYLOAD(tb[IFLA_IPOIB_PKEY]) < sizeof(__u16))
  92                 return;
  93
  94         __u16 pkey = rta_getattr_u16(tb[IFLA_IPOIB_PKEY]);
  95
  96         if (is_json_context()) {
  97                 SPRINT_BUF(b1);
  98
  99                 snprintf(b1, sizeof(b1), "%#.4x", pkey);
 100                 print_string(PRINT_JSON, "key", NULL, b1);
 101         } else {
 102                 fprintf(f, "pkey  %#.4x ", pkey);
 103         }
 104
 105         if (!tb[IFLA_IPOIB_MODE] ||
 106             RTA_PAYLOAD(tb[IFLA_IPOIB_MODE]) < sizeof(__u16))
 107                 return;
 108
 109         mode = rta_getattr_u16(tb[IFLA_IPOIB_MODE]);
 110
 111         const char *mode_str =
 112                 mode == IPOIB_MODE_DATAGRAM ? "datagram" :
 113                 mode == IPOIB_MODE_CONNECTED ? "connected" : "unknown";
 114
 115         print_string(PRINT_ANY, "mode", "mode  %s ", mode_str);
 116
 117         if (!tb[IFLA_IPOIB_UMCAST] ||
 118             RTA_PAYLOAD(tb[IFLA_IPOIB_UMCAST]) < sizeof(__u16))
 119                 return;
 120
 121         __u16 umcast = rta_getattr_u16(tb[IFLA_IPOIB_UMCAST]);
 122
 123         if (is_json_context()) {
 124                 SPRINT_BUF(b1);
 125
 126                 snprintf(b1, sizeof(b1), "%.4x", umcast);
 127                 print_string(PRINT_JSON, "umcast", NULL, b1);
 128         } else {
 129                 fprintf(f, "umcast  %.4x ", umcast);
 130         }
 131 }
 132
 133 static void ipoib_print_help(struct link_util *lu, int argc, char **argv,
 134         FILE *f)
 135 {
 136         print_explain(f);
 137 }
 138
 139 struct link_util ipoib_link_util = {
 140         .id             = "ipoib",
 141         .maxattr        = IFLA_IPOIB_MAX,
 142         .parse_opt      = ipoib_parse_opt,
 143         .print_opt      = ipoib_print_opt,
 144         .print_help     = ipoib_print_help,
 145 };