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Documentation/networking/ifenslave.c: In function ‘if_getconfig’: Documentation/networking/ifenslave.c:508:14: warning: variable ‘mtu’ set but not used [-Wunused-but-set-variable] Documentation/networking/ifenslave.c:508:6: warning: variable ‘metric’ set but not used [-Wunused-but-set-variable] The purpose of this function is to simply print out the values it probes, so... Signed-off-by: David S. Miller <davem@davemloft.net>
1106 lines
29 KiB
C
1106 lines
29 KiB
C
/* Mode: C;
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* ifenslave.c: Configure network interfaces for parallel routing.
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*
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* This program controls the Linux implementation of running multiple
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* network interfaces in parallel.
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*
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* Author: Donald Becker <becker@cesdis.gsfc.nasa.gov>
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* Copyright 1994-1996 Donald Becker
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
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* Center of Excellence in Space Data and Information Sciences
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* Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
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*
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* Changes :
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* - 2000/10/02 Willy Tarreau <willy at meta-x.org> :
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* - few fixes. Master's MAC address is now correctly taken from
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* the first device when not previously set ;
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* - detach support : call BOND_RELEASE to detach an enslaved interface.
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* - give a mini-howto from command-line help : # ifenslave -h
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*
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* - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> :
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* - Master is now brought down before setting the MAC address. In
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* the 2.4 kernel you can't change the MAC address while the device is
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* up because you get EBUSY.
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*
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* - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com>
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* - Added the ability to change the active interface on a mode 1 bond
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* at runtime.
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*
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* - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> :
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* - No longer set the MAC address of the master. The bond device will
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* take care of this itself
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* - Try the SIOC*** versions of the bonding ioctls before using the
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* old versions
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* - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> :
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* - ifr2.ifr_flags was not initialized in the hwaddr_notset case,
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* SIOCGIFFLAGS now called before hwaddr_notset test
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*
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* - 2002/10/31 Tony Cureington <tony.cureington * hp_com> :
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* - If the master does not have a hardware address when the first slave
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* is enslaved, the master is assigned the hardware address of that
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* slave - there is a comment in bonding.c stating "ifenslave takes
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* care of this now." This corrects the problem of slaves having
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* different hardware addresses in active-backup mode when
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* multiple interfaces are specified on a single ifenslave command
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* (ifenslave bond0 eth0 eth1).
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*
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* - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
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* Shmulik Hen <shmulik.hen at intel dot com>
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* - Moved setting the slave's mac address and openning it, from
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* the application to the driver. This enables support of modes
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* that need to use the unique mac address of each slave.
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* The driver also takes care of closing the slave and restoring its
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* original mac address upon release.
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* In addition, block possibility of enslaving before the master is up.
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* This prevents putting the system in an undefined state.
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*
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* - 2003/05/01 - Amir Noam <amir.noam at intel dot com>
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* - Added ABI version control to restore compatibility between
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* new/old ifenslave and new/old bonding.
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* - Prevent adding an adapter that is already a slave.
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* Fixes the problem of stalling the transmission and leaving
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* the slave in a down state.
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*
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* - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
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* - Prevent enslaving if the bond device is down.
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* Fixes the problem of leaving the system in unstable state and
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* halting when trying to remove the module.
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* - Close socket on all abnormal exists.
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* - Add versioning scheme that follows that of the bonding driver.
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* current version is 1.0.0 as a base line.
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*
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* - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
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* - ifenslave -c was broken; it's now fixed
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* - Fixed problem with routes vanishing from master during enslave
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* processing.
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*
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* - 2003/05/27 - Amir Noam <amir.noam at intel dot com>
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* - Fix backward compatibility issues:
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* For drivers not using ABI versions, slave was set down while
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* it should be left up before enslaving.
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* Also, master was not set down and the default set_mac_address()
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* would fail and generate an error message in the system log.
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* - For opt_c: slave should not be set to the master's setting
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* while it is running. It was already set during enslave. To
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* simplify things, it is now handled separately.
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*
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* - 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
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* - Code cleanup and style changes
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* set version to 1.1.0
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*/
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#define APP_VERSION "1.1.0"
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#define APP_RELDATE "December 1, 2003"
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#define APP_NAME "ifenslave"
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static char *version =
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APP_NAME ".c:v" APP_VERSION " (" APP_RELDATE ")\n"
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"o Donald Becker (becker@cesdis.gsfc.nasa.gov).\n"
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"o Detach support added on 2000/10/02 by Willy Tarreau (willy at meta-x.org).\n"
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"o 2.4 kernel support added on 2001/02/16 by Chad N. Tindel\n"
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" (ctindel at ieee dot org).\n";
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static const char *usage_msg =
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"Usage: ifenslave [-f] <master-if> <slave-if> [<slave-if>...]\n"
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" ifenslave -d <master-if> <slave-if> [<slave-if>...]\n"
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" ifenslave -c <master-if> <slave-if>\n"
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" ifenslave --help\n";
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static const char *help_msg =
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"\n"
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" To create a bond device, simply follow these three steps :\n"
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" - ensure that the required drivers are properly loaded :\n"
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" # modprobe bonding ; modprobe <3c59x|eepro100|pcnet32|tulip|...>\n"
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" - assign an IP address to the bond device :\n"
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" # ifconfig bond0 <addr> netmask <mask> broadcast <bcast>\n"
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" - attach all the interfaces you need to the bond device :\n"
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" # ifenslave [{-f|--force}] bond0 eth0 [eth1 [eth2]...]\n"
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" If bond0 didn't have a MAC address, it will take eth0's. Then, all\n"
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" interfaces attached AFTER this assignment will get the same MAC addr.\n"
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" (except for ALB/TLB modes)\n"
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"\n"
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" To set the bond device down and automatically release all the slaves :\n"
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" # ifconfig bond0 down\n"
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"\n"
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" To detach a dead interface without setting the bond device down :\n"
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" # ifenslave {-d|--detach} bond0 eth0 [eth1 [eth2]...]\n"
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"\n"
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" To change active slave :\n"
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" # ifenslave {-c|--change-active} bond0 eth0\n"
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"\n"
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" To show master interface info\n"
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" # ifenslave bond0\n"
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"\n"
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" To show all interfaces info\n"
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" # ifenslave {-a|--all-interfaces}\n"
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"\n"
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" To be more verbose\n"
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" # ifenslave {-v|--verbose} ...\n"
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"\n"
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" # ifenslave {-u|--usage} Show usage\n"
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" # ifenslave {-V|--version} Show version\n"
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" # ifenslave {-h|--help} This message\n"
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"\n";
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <linux/if.h>
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#include <net/if_arp.h>
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#include <linux/if_ether.h>
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#include <linux/if_bonding.h>
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#include <linux/sockios.h>
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typedef unsigned long long u64; /* hack, so we may include kernel's ethtool.h */
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typedef __uint32_t u32; /* ditto */
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typedef __uint16_t u16; /* ditto */
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typedef __uint8_t u8; /* ditto */
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#include <linux/ethtool.h>
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struct option longopts[] = {
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/* { name has_arg *flag val } */
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{"all-interfaces", 0, 0, 'a'}, /* Show all interfaces. */
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{"change-active", 0, 0, 'c'}, /* Change the active slave. */
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{"detach", 0, 0, 'd'}, /* Detach a slave interface. */
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{"force", 0, 0, 'f'}, /* Force the operation. */
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{"help", 0, 0, 'h'}, /* Give help */
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{"usage", 0, 0, 'u'}, /* Give usage */
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{"verbose", 0, 0, 'v'}, /* Report each action taken. */
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{"version", 0, 0, 'V'}, /* Emit version information. */
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{ 0, 0, 0, 0}
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};
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/* Command-line flags. */
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unsigned int
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opt_a = 0, /* Show-all-interfaces flag. */
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opt_c = 0, /* Change-active-slave flag. */
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opt_d = 0, /* Detach a slave interface. */
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opt_f = 0, /* Force the operation. */
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opt_h = 0, /* Help */
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opt_u = 0, /* Usage */
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opt_v = 0, /* Verbose flag. */
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opt_V = 0; /* Version */
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int skfd = -1; /* AF_INET socket for ioctl() calls.*/
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int abi_ver = 0; /* userland - kernel ABI version */
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int hwaddr_set = 0; /* Master's hwaddr is set */
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int saved_errno;
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struct ifreq master_mtu, master_flags, master_hwaddr;
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struct ifreq slave_mtu, slave_flags, slave_hwaddr;
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struct dev_ifr {
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struct ifreq *req_ifr;
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char *req_name;
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int req_type;
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};
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struct dev_ifr master_ifra[] = {
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{&master_mtu, "SIOCGIFMTU", SIOCGIFMTU},
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{&master_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
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{&master_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
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{NULL, "", 0}
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};
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struct dev_ifr slave_ifra[] = {
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{&slave_mtu, "SIOCGIFMTU", SIOCGIFMTU},
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{&slave_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
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{&slave_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
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{NULL, "", 0}
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};
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static void if_print(char *ifname);
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static int get_drv_info(char *master_ifname);
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static int get_if_settings(char *ifname, struct dev_ifr ifra[]);
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static int get_slave_flags(char *slave_ifname);
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static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr);
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static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr);
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static int set_slave_mtu(char *slave_ifname, int mtu);
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static int set_if_flags(char *ifname, short flags);
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static int set_if_up(char *ifname, short flags);
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static int set_if_down(char *ifname, short flags);
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static int clear_if_addr(char *ifname);
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static int set_if_addr(char *master_ifname, char *slave_ifname);
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static int change_active(char *master_ifname, char *slave_ifname);
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static int enslave(char *master_ifname, char *slave_ifname);
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static int release(char *master_ifname, char *slave_ifname);
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#define v_print(fmt, args...) \
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if (opt_v) \
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fprintf(stderr, fmt, ## args )
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int main(int argc, char *argv[])
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{
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char **spp, *master_ifname, *slave_ifname;
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int c, i, rv;
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int res = 0;
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int exclusive = 0;
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while ((c = getopt_long(argc, argv, "acdfhuvV", longopts, 0)) != EOF) {
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switch (c) {
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case 'a': opt_a++; exclusive++; break;
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case 'c': opt_c++; exclusive++; break;
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case 'd': opt_d++; exclusive++; break;
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case 'f': opt_f++; exclusive++; break;
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case 'h': opt_h++; exclusive++; break;
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case 'u': opt_u++; exclusive++; break;
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case 'v': opt_v++; break;
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case 'V': opt_V++; exclusive++; break;
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case '?':
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fprintf(stderr, "%s", usage_msg);
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res = 2;
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goto out;
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}
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}
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/* options check */
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if (exclusive > 1) {
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fprintf(stderr, "%s", usage_msg);
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res = 2;
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goto out;
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}
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if (opt_v || opt_V) {
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printf("%s", version);
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if (opt_V) {
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res = 0;
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goto out;
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}
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}
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if (opt_u) {
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printf("%s", usage_msg);
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res = 0;
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goto out;
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}
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if (opt_h) {
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printf("%s", usage_msg);
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printf("%s", help_msg);
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res = 0;
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goto out;
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}
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/* Open a basic socket */
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if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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perror("socket");
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res = 1;
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goto out;
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}
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if (opt_a) {
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if (optind == argc) {
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/* No remaining args */
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/* show all interfaces */
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if_print((char *)NULL);
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goto out;
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} else {
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/* Just show usage */
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fprintf(stderr, "%s", usage_msg);
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res = 2;
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goto out;
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}
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}
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/* Copy the interface name */
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spp = argv + optind;
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master_ifname = *spp++;
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if (master_ifname == NULL) {
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fprintf(stderr, "%s", usage_msg);
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res = 2;
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goto out;
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}
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/* exchange abi version with bonding module */
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res = get_drv_info(master_ifname);
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if (res) {
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fprintf(stderr,
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"Master '%s': Error: handshake with driver failed. "
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"Aborting\n",
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master_ifname);
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goto out;
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}
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slave_ifname = *spp++;
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if (slave_ifname == NULL) {
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if (opt_d || opt_c) {
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fprintf(stderr, "%s", usage_msg);
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res = 2;
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goto out;
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}
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/* A single arg means show the
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* configuration for this interface
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*/
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if_print(master_ifname);
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goto out;
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}
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res = get_if_settings(master_ifname, master_ifra);
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if (res) {
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/* Probably a good reason not to go on */
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fprintf(stderr,
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"Master '%s': Error: get settings failed: %s. "
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"Aborting\n",
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master_ifname, strerror(res));
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goto out;
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}
|
|
|
|
/* check if master is indeed a master;
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* if not then fail any operation
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*/
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if (!(master_flags.ifr_flags & IFF_MASTER)) {
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fprintf(stderr,
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"Illegal operation; the specified interface '%s' "
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"is not a master. Aborting\n",
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master_ifname);
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res = 1;
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goto out;
|
|
}
|
|
|
|
/* check if master is up; if not then fail any operation */
|
|
if (!(master_flags.ifr_flags & IFF_UP)) {
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fprintf(stderr,
|
|
"Illegal operation; the specified master interface "
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|
"'%s' is not up.\n",
|
|
master_ifname);
|
|
res = 1;
|
|
goto out;
|
|
}
|
|
|
|
/* Only for enslaving */
|
|
if (!opt_c && !opt_d) {
|
|
sa_family_t master_family = master_hwaddr.ifr_hwaddr.sa_family;
|
|
unsigned char *hwaddr =
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(unsigned char *)master_hwaddr.ifr_hwaddr.sa_data;
|
|
|
|
/* The family '1' is ARPHRD_ETHER for ethernet. */
|
|
if (master_family != 1 && !opt_f) {
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|
fprintf(stderr,
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|
"Illegal operation: The specified master "
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|
"interface '%s' is not ethernet-like.\n "
|
|
"This program is designed to work with "
|
|
"ethernet-like network interfaces.\n "
|
|
"Use the '-f' option to force the "
|
|
"operation.\n",
|
|
master_ifname);
|
|
res = 1;
|
|
goto out;
|
|
}
|
|
|
|
/* Check master's hw addr */
|
|
for (i = 0; i < 6; i++) {
|
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if (hwaddr[i] != 0) {
|
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hwaddr_set = 1;
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break;
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|
}
|
|
}
|
|
|
|
if (hwaddr_set) {
|
|
v_print("current hardware address of master '%s' "
|
|
"is %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
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|
"type %d\n",
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|
master_ifname,
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|
hwaddr[0], hwaddr[1],
|
|
hwaddr[2], hwaddr[3],
|
|
hwaddr[4], hwaddr[5],
|
|
master_family);
|
|
}
|
|
}
|
|
|
|
/* Accepts only one slave */
|
|
if (opt_c) {
|
|
/* change active slave */
|
|
res = get_slave_flags(slave_ifname);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: get flags failed. "
|
|
"Aborting\n",
|
|
slave_ifname);
|
|
goto out;
|
|
}
|
|
res = change_active(master_ifname, slave_ifname);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Master '%s', Slave '%s': Error: "
|
|
"Change active failed\n",
|
|
master_ifname, slave_ifname);
|
|
}
|
|
} else {
|
|
/* Accept multiple slaves */
|
|
do {
|
|
if (opt_d) {
|
|
/* detach a slave interface from the master */
|
|
rv = get_slave_flags(slave_ifname);
|
|
if (rv) {
|
|
/* Can't work with this slave. */
|
|
/* remember the error and skip it*/
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: get flags "
|
|
"failed. Skipping\n",
|
|
slave_ifname);
|
|
res = rv;
|
|
continue;
|
|
}
|
|
rv = release(master_ifname, slave_ifname);
|
|
if (rv) {
|
|
fprintf(stderr,
|
|
"Master '%s', Slave '%s': Error: "
|
|
"Release failed\n",
|
|
master_ifname, slave_ifname);
|
|
res = rv;
|
|
}
|
|
} else {
|
|
/* attach a slave interface to the master */
|
|
rv = get_if_settings(slave_ifname, slave_ifra);
|
|
if (rv) {
|
|
/* Can't work with this slave. */
|
|
/* remember the error and skip it*/
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: get "
|
|
"settings failed: %s. "
|
|
"Skipping\n",
|
|
slave_ifname, strerror(rv));
|
|
res = rv;
|
|
continue;
|
|
}
|
|
rv = enslave(master_ifname, slave_ifname);
|
|
if (rv) {
|
|
fprintf(stderr,
|
|
"Master '%s', Slave '%s': Error: "
|
|
"Enslave failed\n",
|
|
master_ifname, slave_ifname);
|
|
res = rv;
|
|
}
|
|
}
|
|
} while ((slave_ifname = *spp++) != NULL);
|
|
}
|
|
|
|
out:
|
|
if (skfd >= 0) {
|
|
close(skfd);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static short mif_flags;
|
|
|
|
/* Get the inteface configuration from the kernel. */
|
|
static int if_getconfig(char *ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int metric, mtu; /* Parameters of the master interface. */
|
|
struct sockaddr dstaddr, broadaddr, netmask;
|
|
unsigned char *hwaddr;
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
|
|
return -1;
|
|
mif_flags = ifr.ifr_flags;
|
|
printf("The result of SIOCGIFFLAGS on %s is %x.\n",
|
|
ifname, ifr.ifr_flags);
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFADDR, &ifr) < 0)
|
|
return -1;
|
|
printf("The result of SIOCGIFADDR is %2.2x.%2.2x.%2.2x.%2.2x.\n",
|
|
ifr.ifr_addr.sa_data[0], ifr.ifr_addr.sa_data[1],
|
|
ifr.ifr_addr.sa_data[2], ifr.ifr_addr.sa_data[3]);
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
|
|
return -1;
|
|
|
|
/* Gotta convert from 'char' to unsigned for printf(). */
|
|
hwaddr = (unsigned char *)ifr.ifr_hwaddr.sa_data;
|
|
printf("The result of SIOCGIFHWADDR is type %d "
|
|
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
|
|
ifr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1],
|
|
hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0) {
|
|
metric = 0;
|
|
} else
|
|
metric = ifr.ifr_metric;
|
|
printf("The result of SIOCGIFMETRIC is %d\n", metric);
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
|
|
mtu = 0;
|
|
else
|
|
mtu = ifr.ifr_mtu;
|
|
printf("The result of SIOCGIFMTU is %d\n", mtu);
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFDSTADDR, &ifr) < 0) {
|
|
memset(&dstaddr, 0, sizeof(struct sockaddr));
|
|
} else
|
|
dstaddr = ifr.ifr_dstaddr;
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFBRDADDR, &ifr) < 0) {
|
|
memset(&broadaddr, 0, sizeof(struct sockaddr));
|
|
} else
|
|
broadaddr = ifr.ifr_broadaddr;
|
|
|
|
strcpy(ifr.ifr_name, ifname);
|
|
if (ioctl(skfd, SIOCGIFNETMASK, &ifr) < 0) {
|
|
memset(&netmask, 0, sizeof(struct sockaddr));
|
|
} else
|
|
netmask = ifr.ifr_netmask;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void if_print(char *ifname)
|
|
{
|
|
char buff[1024];
|
|
struct ifconf ifc;
|
|
struct ifreq *ifr;
|
|
int i;
|
|
|
|
if (ifname == (char *)NULL) {
|
|
ifc.ifc_len = sizeof(buff);
|
|
ifc.ifc_buf = buff;
|
|
if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) {
|
|
perror("SIOCGIFCONF failed");
|
|
return;
|
|
}
|
|
|
|
ifr = ifc.ifc_req;
|
|
for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; ifr++) {
|
|
if (if_getconfig(ifr->ifr_name) < 0) {
|
|
fprintf(stderr,
|
|
"%s: unknown interface.\n",
|
|
ifr->ifr_name);
|
|
continue;
|
|
}
|
|
|
|
if (((mif_flags & IFF_UP) == 0) && !opt_a) continue;
|
|
/*ife_print(&ife);*/
|
|
}
|
|
} else {
|
|
if (if_getconfig(ifname) < 0) {
|
|
fprintf(stderr,
|
|
"%s: unknown interface.\n", ifname);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int get_drv_info(char *master_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
struct ethtool_drvinfo info;
|
|
char *endptr;
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
ifr.ifr_data = (caddr_t)&info;
|
|
|
|
info.cmd = ETHTOOL_GDRVINFO;
|
|
strncpy(info.driver, "ifenslave", 32);
|
|
snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
|
|
|
|
if (ioctl(skfd, SIOCETHTOOL, &ifr) < 0) {
|
|
if (errno == EOPNOTSUPP) {
|
|
goto out;
|
|
}
|
|
|
|
saved_errno = errno;
|
|
v_print("Master '%s': Error: get bonding info failed %s\n",
|
|
master_ifname, strerror(saved_errno));
|
|
return 1;
|
|
}
|
|
|
|
abi_ver = strtoul(info.fw_version, &endptr, 0);
|
|
if (*endptr) {
|
|
v_print("Master '%s': Error: got invalid string as an ABI "
|
|
"version from the bonding module\n",
|
|
master_ifname);
|
|
return 1;
|
|
}
|
|
|
|
out:
|
|
v_print("ABI ver is %d\n", abi_ver);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int change_active(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
if (!(slave_flags.ifr_flags & IFF_SLAVE)) {
|
|
fprintf(stderr,
|
|
"Illegal operation: The specified slave interface "
|
|
"'%s' is not a slave\n",
|
|
slave_ifname);
|
|
return 1;
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if ((ioctl(skfd, SIOCBONDCHANGEACTIVE, &ifr) < 0) &&
|
|
(ioctl(skfd, BOND_CHANGE_ACTIVE_OLD, &ifr) < 0)) {
|
|
saved_errno = errno;
|
|
v_print("Master '%s': Error: SIOCBONDCHANGEACTIVE failed: "
|
|
"%s\n",
|
|
master_ifname, strerror(saved_errno));
|
|
res = 1;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int enslave(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
if (slave_flags.ifr_flags & IFF_SLAVE) {
|
|
fprintf(stderr,
|
|
"Illegal operation: The specified slave interface "
|
|
"'%s' is already a slave\n",
|
|
slave_ifname);
|
|
return 1;
|
|
}
|
|
|
|
res = set_if_down(slave_ifname, slave_flags.ifr_flags);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: bring interface down failed\n",
|
|
slave_ifname);
|
|
return res;
|
|
}
|
|
|
|
if (abi_ver < 2) {
|
|
/* Older bonding versions would panic if the slave has no IP
|
|
* address, so get the IP setting from the master.
|
|
*/
|
|
set_if_addr(master_ifname, slave_ifname);
|
|
} else {
|
|
res = clear_if_addr(slave_ifname);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: clear address failed\n",
|
|
slave_ifname);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (master_mtu.ifr_mtu != slave_mtu.ifr_mtu) {
|
|
res = set_slave_mtu(slave_ifname, master_mtu.ifr_mtu);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: set MTU failed\n",
|
|
slave_ifname);
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (hwaddr_set) {
|
|
/* Master already has an hwaddr
|
|
* so set it's hwaddr to the slave
|
|
*/
|
|
if (abi_ver < 1) {
|
|
/* The driver is using an old ABI, so
|
|
* the application sets the slave's
|
|
* hwaddr
|
|
*/
|
|
res = set_slave_hwaddr(slave_ifname,
|
|
&(master_hwaddr.ifr_hwaddr));
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: set hw address "
|
|
"failed\n",
|
|
slave_ifname);
|
|
goto undo_mtu;
|
|
}
|
|
|
|
/* For old ABI the application needs to bring the
|
|
* slave back up
|
|
*/
|
|
res = set_if_up(slave_ifname, slave_flags.ifr_flags);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: bring interface "
|
|
"down failed\n",
|
|
slave_ifname);
|
|
goto undo_slave_mac;
|
|
}
|
|
}
|
|
/* The driver is using a new ABI,
|
|
* so the driver takes care of setting
|
|
* the slave's hwaddr and bringing
|
|
* it up again
|
|
*/
|
|
} else {
|
|
/* No hwaddr for master yet, so
|
|
* set the slave's hwaddr to it
|
|
*/
|
|
if (abi_ver < 1) {
|
|
/* For old ABI, the master needs to be
|
|
* down before setting its hwaddr
|
|
*/
|
|
res = set_if_down(master_ifname, master_flags.ifr_flags);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Master '%s': Error: bring interface "
|
|
"down failed\n",
|
|
master_ifname);
|
|
goto undo_mtu;
|
|
}
|
|
}
|
|
|
|
res = set_master_hwaddr(master_ifname,
|
|
&(slave_hwaddr.ifr_hwaddr));
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Master '%s': Error: set hw address "
|
|
"failed\n",
|
|
master_ifname);
|
|
goto undo_mtu;
|
|
}
|
|
|
|
if (abi_ver < 1) {
|
|
/* For old ABI, bring the master
|
|
* back up
|
|
*/
|
|
res = set_if_up(master_ifname, master_flags.ifr_flags);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Master '%s': Error: bring interface "
|
|
"up failed\n",
|
|
master_ifname);
|
|
goto undo_master_mac;
|
|
}
|
|
}
|
|
|
|
hwaddr_set = 1;
|
|
}
|
|
|
|
/* Do the real thing */
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if ((ioctl(skfd, SIOCBONDENSLAVE, &ifr) < 0) &&
|
|
(ioctl(skfd, BOND_ENSLAVE_OLD, &ifr) < 0)) {
|
|
saved_errno = errno;
|
|
v_print("Master '%s': Error: SIOCBONDENSLAVE failed: %s\n",
|
|
master_ifname, strerror(saved_errno));
|
|
res = 1;
|
|
}
|
|
|
|
if (res) {
|
|
goto undo_master_mac;
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* rollback (best effort) */
|
|
undo_master_mac:
|
|
set_master_hwaddr(master_ifname, &(master_hwaddr.ifr_hwaddr));
|
|
hwaddr_set = 0;
|
|
goto undo_mtu;
|
|
undo_slave_mac:
|
|
set_slave_hwaddr(slave_ifname, &(slave_hwaddr.ifr_hwaddr));
|
|
undo_mtu:
|
|
set_slave_mtu(slave_ifname, slave_mtu.ifr_mtu);
|
|
return res;
|
|
}
|
|
|
|
static int release(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
if (!(slave_flags.ifr_flags & IFF_SLAVE)) {
|
|
fprintf(stderr,
|
|
"Illegal operation: The specified slave interface "
|
|
"'%s' is not a slave\n",
|
|
slave_ifname);
|
|
return 1;
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
strncpy(ifr.ifr_slave, slave_ifname, IFNAMSIZ);
|
|
if ((ioctl(skfd, SIOCBONDRELEASE, &ifr) < 0) &&
|
|
(ioctl(skfd, BOND_RELEASE_OLD, &ifr) < 0)) {
|
|
saved_errno = errno;
|
|
v_print("Master '%s': Error: SIOCBONDRELEASE failed: %s\n",
|
|
master_ifname, strerror(saved_errno));
|
|
return 1;
|
|
} else if (abi_ver < 1) {
|
|
/* The driver is using an old ABI, so we'll set the interface
|
|
* down to avoid any conflicts due to same MAC/IP
|
|
*/
|
|
res = set_if_down(slave_ifname, slave_flags.ifr_flags);
|
|
if (res) {
|
|
fprintf(stderr,
|
|
"Slave '%s': Error: bring interface "
|
|
"down failed\n",
|
|
slave_ifname);
|
|
}
|
|
}
|
|
|
|
/* set to default mtu */
|
|
set_slave_mtu(slave_ifname, 1500);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int get_if_settings(char *ifname, struct dev_ifr ifra[])
|
|
{
|
|
int i;
|
|
int res = 0;
|
|
|
|
for (i = 0; ifra[i].req_ifr; i++) {
|
|
strncpy(ifra[i].req_ifr->ifr_name, ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, ifra[i].req_type, ifra[i].req_ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Interface '%s': Error: %s failed: %s\n",
|
|
ifname, ifra[i].req_name,
|
|
strerror(saved_errno));
|
|
|
|
return saved_errno;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_slave_flags(char *slave_ifname)
|
|
{
|
|
int res = 0;
|
|
|
|
strncpy(slave_flags.ifr_name, slave_ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, SIOCGIFFLAGS, &slave_flags);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Slave '%s': Error: SIOCGIFFLAGS failed: %s\n",
|
|
slave_ifname, strerror(saved_errno));
|
|
} else {
|
|
v_print("Slave %s: flags %04X.\n",
|
|
slave_ifname, slave_flags.ifr_flags);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr)
|
|
{
|
|
unsigned char *addr = (unsigned char *)hwaddr->sa_data;
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
|
|
res = ioctl(skfd, SIOCSIFHWADDR, &ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Master '%s': Error: SIOCSIFHWADDR failed: %s\n",
|
|
master_ifname, strerror(saved_errno));
|
|
return res;
|
|
} else {
|
|
v_print("Master '%s': hardware address set to "
|
|
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
|
|
master_ifname, addr[0], addr[1], addr[2],
|
|
addr[3], addr[4], addr[5]);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr)
|
|
{
|
|
unsigned char *addr = (unsigned char *)hwaddr->sa_data;
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(struct sockaddr));
|
|
res = ioctl(skfd, SIOCSIFHWADDR, &ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
|
|
v_print("Slave '%s': Error: SIOCSIFHWADDR failed: %s\n",
|
|
slave_ifname, strerror(saved_errno));
|
|
|
|
if (saved_errno == EBUSY) {
|
|
v_print(" The device is busy: it must be idle "
|
|
"before running this command.\n");
|
|
} else if (saved_errno == EOPNOTSUPP) {
|
|
v_print(" The device does not support setting "
|
|
"the MAC address.\n"
|
|
" Your kernel likely does not support slave "
|
|
"devices.\n");
|
|
} else if (saved_errno == EINVAL) {
|
|
v_print(" The device's address type does not match "
|
|
"the master's address type.\n");
|
|
}
|
|
return res;
|
|
} else {
|
|
v_print("Slave '%s': hardware address set to "
|
|
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
|
|
slave_ifname, addr[0], addr[1], addr[2],
|
|
addr[3], addr[4], addr[5]);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_slave_mtu(char *slave_ifname, int mtu)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
ifr.ifr_mtu = mtu;
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
|
|
res = ioctl(skfd, SIOCSIFMTU, &ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Slave '%s': Error: SIOCSIFMTU failed: %s\n",
|
|
slave_ifname, strerror(saved_errno));
|
|
} else {
|
|
v_print("Slave '%s': MTU set to %d.\n", slave_ifname, mtu);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_if_flags(char *ifname, short flags)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
ifr.ifr_flags = flags;
|
|
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
|
|
|
|
res = ioctl(skfd, SIOCSIFFLAGS, &ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Interface '%s': Error: SIOCSIFFLAGS failed: %s\n",
|
|
ifname, strerror(saved_errno));
|
|
} else {
|
|
v_print("Interface '%s': flags set to %04X.\n", ifname, flags);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_if_up(char *ifname, short flags)
|
|
{
|
|
return set_if_flags(ifname, flags | IFF_UP);
|
|
}
|
|
|
|
static int set_if_down(char *ifname, short flags)
|
|
{
|
|
return set_if_flags(ifname, flags & ~IFF_UP);
|
|
}
|
|
|
|
static int clear_if_addr(char *ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res = 0;
|
|
|
|
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
|
|
ifr.ifr_addr.sa_family = AF_INET;
|
|
memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
|
|
|
|
res = ioctl(skfd, SIOCSIFADDR, &ifr);
|
|
if (res < 0) {
|
|
saved_errno = errno;
|
|
v_print("Interface '%s': Error: SIOCSIFADDR failed: %s\n",
|
|
ifname, strerror(saved_errno));
|
|
} else {
|
|
v_print("Interface '%s': address cleared\n", ifname);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int set_if_addr(char *master_ifname, char *slave_ifname)
|
|
{
|
|
struct ifreq ifr;
|
|
int res;
|
|
unsigned char *ipaddr;
|
|
int i;
|
|
struct {
|
|
char *req_name;
|
|
char *desc;
|
|
int g_ioctl;
|
|
int s_ioctl;
|
|
} ifra[] = {
|
|
{"IFADDR", "addr", SIOCGIFADDR, SIOCSIFADDR},
|
|
{"DSTADDR", "destination addr", SIOCGIFDSTADDR, SIOCSIFDSTADDR},
|
|
{"BRDADDR", "broadcast addr", SIOCGIFBRDADDR, SIOCSIFBRDADDR},
|
|
{"NETMASK", "netmask", SIOCGIFNETMASK, SIOCSIFNETMASK},
|
|
{NULL, NULL, 0, 0},
|
|
};
|
|
|
|
for (i = 0; ifra[i].req_name; i++) {
|
|
strncpy(ifr.ifr_name, master_ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, ifra[i].g_ioctl, &ifr);
|
|
if (res < 0) {
|
|
int saved_errno = errno;
|
|
|
|
v_print("Interface '%s': Error: SIOCG%s failed: %s\n",
|
|
master_ifname, ifra[i].req_name,
|
|
strerror(saved_errno));
|
|
|
|
ifr.ifr_addr.sa_family = AF_INET;
|
|
memset(ifr.ifr_addr.sa_data, 0,
|
|
sizeof(ifr.ifr_addr.sa_data));
|
|
}
|
|
|
|
strncpy(ifr.ifr_name, slave_ifname, IFNAMSIZ);
|
|
res = ioctl(skfd, ifra[i].s_ioctl, &ifr);
|
|
if (res < 0) {
|
|
int saved_errno = errno;
|
|
|
|
v_print("Interface '%s': Error: SIOCS%s failed: %s\n",
|
|
slave_ifname, ifra[i].req_name,
|
|
strerror(saved_errno));
|
|
|
|
}
|
|
|
|
ipaddr = (unsigned char *)ifr.ifr_addr.sa_data;
|
|
v_print("Interface '%s': set IP %s to %d.%d.%d.%d\n",
|
|
slave_ifname, ifra[i].desc,
|
|
ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* version-control: t
|
|
* kept-new-versions: 5
|
|
* c-indent-level: 4
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* compile-command: "gcc -Wall -Wstrict-prototypes -O -I/usr/src/linux/include ifenslave.c -o ifenslave"
|
|
* End:
|
|
*/
|
|
|