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] [mode {datagram | connected}][umcast {0|1}]\n"
  26                 "\n"
  27                 "PKEY  := 0x8001-0xffff\n"
  28         );
  29 }
  30
  31 static void explain(void)
  32 {
  33         print_explain(stderr);
  34 }
  35
  36 static int mode_arg(void)
  37 {
  38         fprintf(stderr, "Error: argument of \"mode\" must be \"datagram\"or \"connected\"\n");
  39         return -1;
  40 }
  41
  42 static int ipoib_parse_opt(struct link_util *lu, int argc, char **argv,
  43                           struct nlmsghdr *n)
  44 {
  45         __u16 pkey, mode, umcast;
  46
  47         while (argc > 0) {
  48                 if (matches(*argv, "pkey") == 0) {
  49                         NEXT_ARG();
  50                         if (get_u16(&pkey, *argv, 0))
  51                                 invarg("pkey is invalid", *argv);
  52                         addattr_l(n, 1024, IFLA_IPOIB_PKEY, &pkey, 2);
  53                 } else if (matches(*argv, "mode") == 0) {
  54                         NEXT_ARG();
  55                         if (strcmp(*argv, "datagram") == 0)
  56                                 mode = IPOIB_MODE_DATAGRAM;
  57                         else if (strcmp(*argv, "connected") == 0)
  58                                 mode = IPOIB_MODE_CONNECTED;
  59                         else
  60                                 return mode_arg();
  61                         addattr_l(n, 1024, IFLA_IPOIB_MODE, &mode, 2);
  62                 } else if (matches(*argv, "umcast") == 0) {
  63                         NEXT_ARG();
  64                         if (get_u16(&umcast, *argv, 0))
  65                                 invarg("umcast is invalid", *argv);
  66                         addattr_l(n, 1024, IFLA_IPOIB_UMCAST, &umcast, 2);
  67                 } else if (matches(*argv, "help") == 0) {
  68                         explain();
  69                         return -1;
  70                 } else {
  71                         fprintf(stderr, "ipoib: unknown option \"%s\"?\n", *argv);
  72                         explain();
  73                         return -1;
  74                 }
  75                 argc--, argv++;
  76         }
  77
  78         return 0;
  79 }
  80
  81 static void ipoib_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  82 {
  83         __u16 mode;
  84
  85         if (!tb)
  86                 return;
  87
  88         if (!tb[IFLA_IPOIB_PKEY] ||
  89             RTA_PAYLOAD(tb[IFLA_IPOIB_PKEY]) < sizeof(__u16))
  90                 return;
  91
  92         fprintf(f, "pkey  %#.4x ", rta_getattr_u16(tb[IFLA_IPOIB_PKEY]));
  93
  94         if (!tb[IFLA_IPOIB_MODE] ||
  95             RTA_PAYLOAD(tb[IFLA_IPOIB_MODE]) < sizeof(__u16))
  96                 return;
  97
  98         mode = rta_getattr_u16(tb[IFLA_IPOIB_MODE]);
  99         fprintf(f, "mode  %s ",
 100                 mode == IPOIB_MODE_DATAGRAM ? "datagram" :
 101                 mode == IPOIB_MODE_CONNECTED ? "connected" :
 102                 "unknown");
 103
 104         if (!tb[IFLA_IPOIB_UMCAST] ||
 105             RTA_PAYLOAD(tb[IFLA_IPOIB_UMCAST]) < sizeof(__u16))
 106                 return;
 107
 108         fprintf(f, "umcast  %.4x ", rta_getattr_u16(tb[IFLA_IPOIB_UMCAST]));
 109 }
 110
 111 static void ipoib_print_help(struct link_util *lu, int argc, char **argv,
 112         FILE *f)
 113 {
 114         print_explain(f);
 115 }
 116
 117 struct link_util ipoib_link_util = {
 118         .id             = "ipoib",
 119         .maxattr        = IFLA_IPOIB_MAX,
 120         .parse_opt      = ipoib_parse_opt,
 121         .print_opt      = ipoib_print_opt,
 122         .print_help     = ipoib_print_help,
 123 };