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 explain(void)
  23 {
  24         fprintf(stderr,
  25                 "Usage: ... ipoib [pkey PKEY] [mode {datagram | connected}]"
  26                 "[umcast {0|1}]\n"
  27                 "\n"
  28                 "PKEY  := 0x8001-0xffff\n"
  29         );
  30 }
  31
  32
  33 static int mode_arg(void)
  34 {
  35         fprintf(stderr, "Error: argument of \"mode\" must be \"datagram\""
  36                 "or \"connected\"\n");
  37         return -1;
  38 }
  39
  40 static int ipoib_parse_opt(struct link_util *lu, int argc, char **argv,
  41                           struct nlmsghdr *n)
  42 {
  43         __u16 pkey, mode, umcast;
  44
  45         while (argc > 0) {
  46                 if (matches(*argv, "pkey") == 0) {
  47                         NEXT_ARG();
  48                         if (get_u16(&pkey, *argv, 0))
  49                                 invarg("pkey is invalid", *argv);
  50                         addattr_l(n, 1024, IFLA_IPOIB_PKEY, &pkey, 2);
  51                 } else if (matches(*argv, "mode") == 0) {
  52                         NEXT_ARG();
  53                         if (strcmp(*argv, "datagram") == 0)
  54                                 mode = IPOIB_MODE_DATAGRAM;
  55                         else if (strcmp(*argv, "connected") == 0)
  56                                 mode = IPOIB_MODE_CONNECTED;
  57                         else
  58                                 return mode_arg();
  59                         addattr_l(n, 1024, IFLA_IPOIB_MODE, &mode, 2);
  60                 } else if (matches(*argv, "umcast") == 0) {
  61                         NEXT_ARG();
  62                         if (get_u16(&umcast, *argv, 0))
  63                                 invarg("umcast is invalid", *argv);
  64                         addattr_l(n, 1024, IFLA_IPOIB_UMCAST, &umcast, 2);
  65                 } else if (matches(*argv, "help") == 0) {
  66                         explain();
  67                         return -1;
  68                 } else {
  69                         fprintf(stderr, "ipoib: unknown option \"%s\"?\n", *argv);
  70                         explain();
  71                         return -1;
  72                 }
  73                 argc--, argv++;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static void ipoib_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  80 {
  81         __u16 mode;
  82
  83         if (!tb)
  84                 return;
  85
  86         if (!tb[IFLA_IPOIB_PKEY] ||
  87             RTA_PAYLOAD(tb[IFLA_IPOIB_PKEY]) < sizeof(__u16))
  88                 return;
  89
  90         fprintf(f, "pkey  %#.4x ", rta_getattr_u16(tb[IFLA_IPOIB_PKEY]));
  91
  92         if (!tb[IFLA_IPOIB_MODE] ||
  93             RTA_PAYLOAD(tb[IFLA_IPOIB_MODE]) < sizeof(__u16))
  94                 return;
  95
  96         mode = rta_getattr_u16(tb[IFLA_IPOIB_MODE]);
  97         fprintf(f, "mode  %s ",
  98                 mode == IPOIB_MODE_DATAGRAM ? "datagram" :
  99                 mode == IPOIB_MODE_CONNECTED ? "connected" :
 100                 "unknown");
 101
 102         if (!tb[IFLA_IPOIB_UMCAST] ||
 103             RTA_PAYLOAD(tb[IFLA_IPOIB_UMCAST]) < sizeof(__u16))
 104                 return;
 105
 106         fprintf(f, "umcast  %.4x ", rta_getattr_u16(tb[IFLA_IPOIB_UMCAST]));
 107 }
 108
 109 struct link_util ipoib_link_util = {
 110         .id             = "ipoib",
 111         .maxattr        = IFLA_IPOIB_MAX,
 112         .parse_opt      = ipoib_parse_opt,
 113         .print_opt      = ipoib_print_opt,
 114 };