1 | /* Mode: C;
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2 | *
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3 | * Mini ifenslave implementation for busybox
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4 | * Copyright (C) 2005 by Marc Leeman <marc.leeman@barco.com>
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5 | *
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6 | * ifenslave.c: Configure network interfaces for parallel routing.
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7 | *
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8 | * This program controls the Linux implementation of running multiple
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9 | * network interfaces in parallel.
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10 | *
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11 | * Author: Donald Becker <becker@cesdis.gsfc.nasa.gov>
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12 | * Copyright 1994-1996 Donald Becker
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13 | *
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14 | * This program is free software; you can redistribute it
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15 | * and/or modify it under the terms of the GNU General Public
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16 | * License as published by the Free Software Foundation.
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17 | *
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18 | * The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
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19 | * Center of Excellence in Space Data and Information Sciences
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20 | * Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
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21 | *
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22 | * Changes :
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23 | * - 2000/10/02 Willy Tarreau <willy at meta-x.org> :
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24 | * - few fixes. Master's MAC address is now correctly taken from
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25 | * the first device when not previously set ;
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26 | * - detach support : call BOND_RELEASE to detach an enslaved interface.
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27 | * - give a mini-howto from command-line help : # ifenslave -h
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28 | *
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29 | * - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> :
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30 | * - Master is now brought down before setting the MAC address. In
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31 | * the 2.4 kernel you can't change the MAC address while the device is
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32 | * up because you get EBUSY.
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33 | *
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34 | * - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com>
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35 | * - Added the ability to change the active interface on a mode 1 bond
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36 | * at runtime.
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37 | *
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38 | * - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> :
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39 | * - No longer set the MAC address of the master. The bond device will
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40 | * take care of this itself
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41 | * - Try the SIOC*** versions of the bonding ioctls before using the
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42 | * old versions
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43 | * - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> :
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44 | * - ifr2.ifr_flags was not initialized in the hwaddr_notset case,
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45 | * SIOCGIFFLAGS now called before hwaddr_notset test
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46 | *
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47 | * - 2002/10/31 Tony Cureington <tony.cureington * hp_com> :
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48 | * - If the master does not have a hardware address when the first slave
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49 | * is enslaved, the master is assigned the hardware address of that
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50 | * slave - there is a comment in bonding.c stating "ifenslave takes
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51 | * care of this now." This corrects the problem of slaves having
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52 | * different hardware addresses in active-backup mode when
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53 | * multiple interfaces are specified on a single ifenslave command
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54 | * (ifenslave bond0 eth0 eth1).
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55 | *
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56 | * - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
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57 | * Shmulik Hen <shmulik.hen at intel dot com>
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58 | * - Moved setting the slave's mac address and openning it, from
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59 | * the application to the driver. This enables support of modes
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60 | * that need to use the unique mac address of each slave.
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61 | * The driver also takes care of closing the slave and restoring its
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62 | * original mac address upon release.
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63 | * In addition, block possibility of enslaving before the master is up.
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64 | * This prevents putting the system in an undefined state.
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65 | *
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66 | * - 2003/05/01 - Amir Noam <amir.noam at intel dot com>
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67 | * - Added ABI version control to restore compatibility between
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68 | * new/old ifenslave and new/old bonding.
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69 | * - Prevent adding an adapter that is already a slave.
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70 | * Fixes the problem of stalling the transmission and leaving
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71 | * the slave in a down state.
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72 | *
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73 | * - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
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74 | * - Prevent enslaving if the bond device is down.
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75 | * Fixes the problem of leaving the system in unstable state and
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76 | * halting when trying to remove the module.
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77 | * - Close socket on all abnormal exists.
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78 | * - Add versioning scheme that follows that of the bonding driver.
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79 | * current version is 1.0.0 as a base line.
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80 | *
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81 | * - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
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82 | * - ifenslave -c was broken; it's now fixed
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83 | * - Fixed problem with routes vanishing from master during enslave
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84 | * processing.
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85 | *
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86 | * - 2003/05/27 - Amir Noam <amir.noam at intel dot com>
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87 | * - Fix backward compatibility issues:
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88 | * For drivers not using ABI versions, slave was set down while
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89 | * it should be left up before enslaving.
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90 | * Also, master was not set down and the default set_mac_address()
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91 | * would fail and generate an error message in the system log.
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92 | * - For opt_c: slave should not be set to the master's setting
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93 | * while it is running. It was already set during enslave. To
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94 | * simplify things, it is now handeled separately.
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95 | *
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96 | * - 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
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97 | * - Code cleanup and style changes
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98 | * set version to 1.1.0
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99 | */
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100 |
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101 | #include "libbb.h"
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102 |
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103 | /* #include <net/if.h> - no. linux/if_bonding.h pulls in linux/if.h */
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104 | #include <linux/if.h>
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105 | //#include <net/if_arp.h> - not needed?
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106 | #include <linux/if_bonding.h>
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107 | #include <linux/sockios.h>
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108 | #include "fix_u32.h" /* hack, so we may include kernel's ethtool.h */
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109 | #include <linux/ethtool.h>
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110 | #ifndef BOND_ABI_VERSION
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111 | # define BOND_ABI_VERSION 2
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112 | #endif
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113 | #ifndef IFNAMSIZ
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114 | # define IFNAMSIZ 16
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115 | #endif
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116 |
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117 |
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118 | struct dev_data {
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119 | struct ifreq mtu, flags, hwaddr;
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120 | };
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121 |
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122 |
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123 | enum { skfd = 3 }; /* AF_INET socket for ioctl() calls. */
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124 | struct globals {
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125 | unsigned abi_ver; /* userland - kernel ABI version */
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126 | smallint hwaddr_set; /* Master's hwaddr is set */
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127 | struct dev_data master;
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128 | struct dev_data slave;
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129 | };
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130 | #define G (*ptr_to_globals)
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131 | #define abi_ver (G.abi_ver )
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132 | #define hwaddr_set (G.hwaddr_set)
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133 | #define master (G.master )
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134 | #define slave (G.slave )
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135 | #define INIT_G() do { \
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136 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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137 | } while (0)
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138 |
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139 |
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140 | /* NOINLINEs are placed where it results in smaller code (gcc 4.3.1) */
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141 |
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142 | static int ioctl_on_skfd(unsigned request, struct ifreq *ifr)
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143 | {
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144 | return ioctl(skfd, request, ifr);
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145 | }
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146 |
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147 | static int set_ifrname_and_do_ioctl(unsigned request, struct ifreq *ifr, const char *ifname)
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148 | {
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149 | strncpy_IFNAMSIZ(ifr->ifr_name, ifname);
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150 | return ioctl_on_skfd(request, ifr);
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151 | }
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152 |
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153 | static int get_if_settings(char *ifname, struct dev_data *dd)
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154 | {
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155 | int res;
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156 |
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157 | res = set_ifrname_and_do_ioctl(SIOCGIFMTU, &dd->mtu, ifname);
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158 | res |= set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &dd->flags, ifname);
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159 | res |= set_ifrname_and_do_ioctl(SIOCGIFHWADDR, &dd->hwaddr, ifname);
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160 |
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161 | return res;
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162 | }
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163 |
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164 | static int get_slave_flags(char *slave_ifname)
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165 | {
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166 | return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
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167 | }
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168 |
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169 | static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
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170 | {
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171 | struct ifreq ifr;
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172 |
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173 | memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
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174 | return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
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175 | }
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176 |
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177 | static int set_mtu(char *ifname, int mtu)
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178 | {
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179 | struct ifreq ifr;
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180 |
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181 | ifr.ifr_mtu = mtu;
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182 | return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, ifname);
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183 | }
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184 |
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185 | static int set_if_flags(char *ifname, int flags)
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186 | {
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187 | struct ifreq ifr;
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188 |
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189 | ifr.ifr_flags = flags;
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190 | return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
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191 | }
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192 |
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193 | static int set_if_up(char *ifname, int flags)
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194 | {
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195 | int res = set_if_flags(ifname, flags | IFF_UP);
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196 | if (res)
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197 | bb_perror_msg("%s: can't up", ifname);
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198 | return res;
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199 | }
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200 |
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201 | static int set_if_down(char *ifname, int flags)
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202 | {
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203 | int res = set_if_flags(ifname, flags & ~IFF_UP);
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204 | if (res)
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205 | bb_perror_msg("%s: can't down", ifname);
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206 | return res;
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207 | }
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208 |
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209 | static int clear_if_addr(char *ifname)
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210 | {
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211 | struct ifreq ifr;
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212 |
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213 | ifr.ifr_addr.sa_family = AF_INET;
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214 | memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
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215 | return set_ifrname_and_do_ioctl(SIOCSIFADDR, &ifr, ifname);
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216 | }
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217 |
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218 | static int set_if_addr(char *master_ifname, char *slave_ifname)
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219 | {
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220 | #if (SIOCGIFADDR | SIOCSIFADDR \
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221 | | SIOCGIFDSTADDR | SIOCSIFDSTADDR \
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222 | | SIOCGIFBRDADDR | SIOCSIFBRDADDR \
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223 | | SIOCGIFNETMASK | SIOCSIFNETMASK) <= 0xffff
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224 | #define INT uint16_t
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225 | #else
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226 | #define INT int
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227 | #endif
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228 | static const struct {
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229 | INT g_ioctl;
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230 | INT s_ioctl;
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231 | } ifra[] = {
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232 | { SIOCGIFADDR, SIOCSIFADDR },
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233 | { SIOCGIFDSTADDR, SIOCSIFDSTADDR },
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234 | { SIOCGIFBRDADDR, SIOCSIFBRDADDR },
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235 | { SIOCGIFNETMASK, SIOCSIFNETMASK },
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236 | };
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237 |
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238 | struct ifreq ifr;
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239 | int res;
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240 | unsigned i;
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241 |
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242 | for (i = 0; i < ARRAY_SIZE(ifra); i++) {
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243 | res = set_ifrname_and_do_ioctl(ifra[i].g_ioctl, &ifr, master_ifname);
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244 | if (res < 0) {
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245 | ifr.ifr_addr.sa_family = AF_INET;
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246 | memset(ifr.ifr_addr.sa_data, 0,
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247 | sizeof(ifr.ifr_addr.sa_data));
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248 | }
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249 |
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250 | res = set_ifrname_and_do_ioctl(ifra[i].s_ioctl, &ifr, slave_ifname);
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251 | if (res < 0)
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252 | return res;
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253 | }
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254 |
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255 | return 0;
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256 | }
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257 |
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258 | static void change_active(char *master_ifname, char *slave_ifname)
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259 | {
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260 | struct ifreq ifr;
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261 |
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262 | if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
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263 | bb_error_msg_and_die("%s is not a slave", slave_ifname);
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264 | }
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265 |
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266 | strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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267 | if (set_ifrname_and_do_ioctl(SIOCBONDCHANGEACTIVE, &ifr, master_ifname)
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268 | && ioctl_on_skfd(BOND_CHANGE_ACTIVE_OLD, &ifr)
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269 | ) {
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270 | bb_perror_msg_and_die(
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271 | "master %s, slave %s: can't "
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272 | "change active",
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273 | master_ifname, slave_ifname);
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274 | }
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275 | }
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276 |
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277 | static NOINLINE int enslave(char *master_ifname, char *slave_ifname)
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278 | {
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279 | struct ifreq ifr;
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280 | int res;
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281 |
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282 | if (slave.flags.ifr_flags & IFF_SLAVE) {
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283 | bb_error_msg(
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284 | "%s is already a slave",
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285 | slave_ifname);
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286 | return 1;
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287 | }
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288 |
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289 | res = set_if_down(slave_ifname, slave.flags.ifr_flags);
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290 | if (res)
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291 | return res;
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292 |
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293 | if (abi_ver < 2) {
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294 | /* Older bonding versions would panic if the slave has no IP
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295 | * address, so get the IP setting from the master.
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296 | */
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297 | res = set_if_addr(master_ifname, slave_ifname);
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298 | if (res) {
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299 | bb_perror_msg("%s: can't set address", slave_ifname);
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300 | return res;
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301 | }
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302 | } else {
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303 | res = clear_if_addr(slave_ifname);
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304 | if (res) {
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305 | bb_perror_msg("%s: can't clear address", slave_ifname);
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306 | return res;
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307 | }
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308 | }
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309 |
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310 | if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
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311 | res = set_mtu(slave_ifname, master.mtu.ifr_mtu);
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312 | if (res) {
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313 | bb_perror_msg("%s: can't set MTU", slave_ifname);
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314 | return res;
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315 | }
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316 | }
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317 |
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318 | if (hwaddr_set) {
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319 | /* Master already has an hwaddr
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320 | * so set it's hwaddr to the slave
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321 | */
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322 | if (abi_ver < 1) {
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323 | /* The driver is using an old ABI, so
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324 | * the application sets the slave's
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325 | * hwaddr
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326 | */
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327 | if (set_hwaddr(slave_ifname, &(master.hwaddr.ifr_hwaddr))) {
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328 | bb_perror_msg("%s: can't set hw address",
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329 | slave_ifname);
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330 | goto undo_mtu;
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331 | }
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332 |
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333 | /* For old ABI the application needs to bring the
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334 | * slave back up
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335 | */
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336 | if (set_if_up(slave_ifname, slave.flags.ifr_flags))
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337 | goto undo_slave_mac;
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338 | }
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339 | /* The driver is using a new ABI,
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340 | * so the driver takes care of setting
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341 | * the slave's hwaddr and bringing
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342 | * it up again
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343 | */
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344 | } else {
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345 | /* No hwaddr for master yet, so
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346 | * set the slave's hwaddr to it
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347 | */
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348 | if (abi_ver < 1) {
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349 | /* For old ABI, the master needs to be
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350 | * down before setting it's hwaddr
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351 | */
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352 | if (set_if_down(master_ifname, master.flags.ifr_flags))
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353 | goto undo_mtu;
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354 | }
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355 |
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356 | if (set_hwaddr(master_ifname, &(slave.hwaddr.ifr_hwaddr))) {
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357 | bb_error_msg("%s: can't set hw address",
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358 | master_ifname);
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359 | goto undo_mtu;
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360 | }
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361 |
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362 | if (abi_ver < 1) {
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363 | /* For old ABI, bring the master
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364 | * back up
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365 | */
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366 | if (set_if_up(master_ifname, master.flags.ifr_flags))
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367 | goto undo_master_mac;
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368 | }
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369 |
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370 | hwaddr_set = 1;
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371 | }
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372 |
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373 | /* Do the real thing */
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374 | strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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375 | if (set_ifrname_and_do_ioctl(SIOCBONDENSLAVE, &ifr, master_ifname)
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376 | && ioctl_on_skfd(BOND_ENSLAVE_OLD, &ifr)
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377 | ) {
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378 | goto undo_master_mac;
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379 | }
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380 |
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381 | return 0;
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382 |
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383 | /* rollback (best effort) */
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384 | undo_master_mac:
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385 | set_hwaddr(master_ifname, &(master.hwaddr.ifr_hwaddr));
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386 | hwaddr_set = 0;
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387 | goto undo_mtu;
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388 |
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389 | undo_slave_mac:
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390 | set_hwaddr(slave_ifname, &(slave.hwaddr.ifr_hwaddr));
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391 | undo_mtu:
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392 | set_mtu(slave_ifname, slave.mtu.ifr_mtu);
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393 | return 1;
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394 | }
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395 |
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396 | static int release(char *master_ifname, char *slave_ifname)
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397 | {
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398 | struct ifreq ifr;
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399 | int res = 0;
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400 |
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401 | if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
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402 | bb_error_msg("%s is not a slave", slave_ifname);
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403 | return 1;
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404 | }
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405 |
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406 | strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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407 | if (set_ifrname_and_do_ioctl(SIOCBONDRELEASE, &ifr, master_ifname) < 0
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408 | && ioctl_on_skfd(BOND_RELEASE_OLD, &ifr) < 0
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409 | ) {
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410 | return 1;
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411 | }
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412 | if (abi_ver < 1) {
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413 | /* The driver is using an old ABI, so we'll set the interface
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414 | * down to avoid any conflicts due to same MAC/IP
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415 | */
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416 | res = set_if_down(slave_ifname, slave.flags.ifr_flags);
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417 | }
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418 |
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419 | /* set to default mtu */
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420 | set_mtu(slave_ifname, 1500);
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421 |
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422 | return res;
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423 | }
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424 |
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425 | static NOINLINE void get_drv_info(char *master_ifname)
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426 | {
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427 | struct ifreq ifr;
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428 | struct ethtool_drvinfo info;
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429 |
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430 | memset(&ifr, 0, sizeof(ifr));
|
---|
431 | ifr.ifr_data = (caddr_t)&info;
|
---|
432 | info.cmd = ETHTOOL_GDRVINFO;
|
---|
433 | /* both fields are 32 bytes long (long enough) */
|
---|
434 | strcpy(info.driver, "ifenslave");
|
---|
435 | strcpy(info.fw_version, utoa(BOND_ABI_VERSION));
|
---|
436 | if (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 0) {
|
---|
437 | if (errno == EOPNOTSUPP)
|
---|
438 | return;
|
---|
439 | bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
|
---|
440 | }
|
---|
441 |
|
---|
442 | abi_ver = bb_strtou(info.fw_version, NULL, 0);
|
---|
443 | if (errno)
|
---|
444 | bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
|
---|
445 | }
|
---|
446 |
|
---|
447 | int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
448 | int ifenslave_main(int argc UNUSED_PARAM, char **argv)
|
---|
449 | {
|
---|
450 | char *master_ifname, *slave_ifname;
|
---|
451 | int rv;
|
---|
452 | int res;
|
---|
453 | unsigned opt;
|
---|
454 | enum {
|
---|
455 | OPT_c = (1 << 0),
|
---|
456 | OPT_d = (1 << 1),
|
---|
457 | OPT_f = (1 << 2),
|
---|
458 | };
|
---|
459 | #if ENABLE_LONG_OPTS
|
---|
460 | static const char ifenslave_longopts[] ALIGN1 =
|
---|
461 | "change-active\0" No_argument "c"
|
---|
462 | "detach\0" No_argument "d"
|
---|
463 | "force\0" No_argument "f"
|
---|
464 | /* "all-interfaces\0" No_argument "a" */
|
---|
465 | ;
|
---|
466 |
|
---|
467 | applet_long_options = ifenslave_longopts;
|
---|
468 | #endif
|
---|
469 | INIT_G();
|
---|
470 |
|
---|
471 | opt = getopt32(argv, "cdfa");
|
---|
472 | argv += optind;
|
---|
473 | if (opt & (opt-1)) /* Only one option can be given */
|
---|
474 | bb_show_usage();
|
---|
475 |
|
---|
476 | master_ifname = *argv++;
|
---|
477 |
|
---|
478 | /* No interface names - show all interfaces. */
|
---|
479 | if (!master_ifname) {
|
---|
480 | display_interfaces(NULL);
|
---|
481 | return EXIT_SUCCESS;
|
---|
482 | }
|
---|
483 |
|
---|
484 | /* Open a basic socket */
|
---|
485 | xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), skfd);
|
---|
486 |
|
---|
487 | /* Exchange abi version with bonding module */
|
---|
488 | get_drv_info(master_ifname);
|
---|
489 |
|
---|
490 | slave_ifname = *argv++;
|
---|
491 | if (!slave_ifname) {
|
---|
492 | if (opt & (OPT_d|OPT_c)) {
|
---|
493 | /* --change or --detach, and no slaves given -
|
---|
494 | * show all interfaces. */
|
---|
495 | display_interfaces(slave_ifname /* == NULL */);
|
---|
496 | return 2; /* why 2? */
|
---|
497 | }
|
---|
498 | /* A single arg means show the
|
---|
499 | * configuration for this interface
|
---|
500 | */
|
---|
501 | display_interfaces(master_ifname);
|
---|
502 | return EXIT_SUCCESS;
|
---|
503 | }
|
---|
504 |
|
---|
505 | if (get_if_settings(master_ifname, &master)) {
|
---|
506 | /* Probably a good reason not to go on */
|
---|
507 | bb_perror_msg_and_die("%s: can't get settings", master_ifname);
|
---|
508 | }
|
---|
509 |
|
---|
510 | /* Check if master is indeed a master;
|
---|
511 | * if not then fail any operation
|
---|
512 | */
|
---|
513 | if (!(master.flags.ifr_flags & IFF_MASTER))
|
---|
514 | bb_error_msg_and_die("%s is not a master", master_ifname);
|
---|
515 |
|
---|
516 | /* Check if master is up; if not then fail any operation */
|
---|
517 | if (!(master.flags.ifr_flags & IFF_UP))
|
---|
518 | bb_error_msg_and_die("%s is not up", master_ifname);
|
---|
519 |
|
---|
520 | #ifdef WHY_BOTHER
|
---|
521 | /* Neither -c[hange] nor -d[etach] -> it's "enslave" then;
|
---|
522 | * and -f[orce] is not there too. Check that it's ethernet. */
|
---|
523 | if (!(opt & (OPT_d|OPT_c|OPT_f)) {
|
---|
524 | /* The family '1' is ARPHRD_ETHER for ethernet. */
|
---|
525 | if (master.hwaddr.ifr_hwaddr.sa_family != 1) {
|
---|
526 | bb_error_msg_and_die(
|
---|
527 | "%s is not ethernet-like (-f overrides)",
|
---|
528 | master_ifname);
|
---|
529 | }
|
---|
530 | }
|
---|
531 | #endif
|
---|
532 |
|
---|
533 | /* Accepts only one slave */
|
---|
534 | if (opt & OPT_c) {
|
---|
535 | /* Change active slave */
|
---|
536 | if (get_slave_flags(slave_ifname)) {
|
---|
537 | bb_perror_msg_and_die(
|
---|
538 | "%s: can't get flags", slave_ifname);
|
---|
539 | }
|
---|
540 | change_active(master_ifname, slave_ifname);
|
---|
541 | return EXIT_SUCCESS;
|
---|
542 | }
|
---|
543 |
|
---|
544 | /* Accepts multiple slaves */
|
---|
545 | res = 0;
|
---|
546 | do {
|
---|
547 | if (opt & OPT_d) {
|
---|
548 | /* Detach a slave interface from the master */
|
---|
549 | rv = get_slave_flags(slave_ifname);
|
---|
550 | if (rv) {
|
---|
551 | /* Can't work with this slave, */
|
---|
552 | /* remember the error and skip it */
|
---|
553 | bb_perror_msg(
|
---|
554 | "skipping %s: can't get flags",
|
---|
555 | slave_ifname);
|
---|
556 | res = rv;
|
---|
557 | continue;
|
---|
558 | }
|
---|
559 | rv = release(master_ifname, slave_ifname);
|
---|
560 | if (rv) {
|
---|
561 | bb_perror_msg("can't release %s from %s",
|
---|
562 | slave_ifname, master_ifname);
|
---|
563 | res = rv;
|
---|
564 | }
|
---|
565 | } else {
|
---|
566 | /* Attach a slave interface to the master */
|
---|
567 | rv = get_if_settings(slave_ifname, &slave);
|
---|
568 | if (rv) {
|
---|
569 | /* Can't work with this slave, */
|
---|
570 | /* remember the error and skip it */
|
---|
571 | bb_perror_msg(
|
---|
572 | "skipping %s: can't get settings",
|
---|
573 | slave_ifname);
|
---|
574 | res = rv;
|
---|
575 | continue;
|
---|
576 | }
|
---|
577 | rv = enslave(master_ifname, slave_ifname);
|
---|
578 | if (rv) {
|
---|
579 | bb_perror_msg("can't enslave %s to %s",
|
---|
580 | slave_ifname, master_ifname);
|
---|
581 | res = rv;
|
---|
582 | }
|
---|
583 | }
|
---|
584 | } while ((slave_ifname = *argv++) != NULL);
|
---|
585 |
|
---|
586 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
587 | close(skfd);
|
---|
588 | }
|
---|
589 |
|
---|
590 | return res;
|
---|
591 | }
|
---|