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 (at) mellanox.com> 10 * copied iflink_vlan.c authored by Patrick McHardy <kaber (at) 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 }; 146
