Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/Documentation/networking/ifenslave.c b/Documentation/networking/ifenslave.c
new file mode 100644
index 0000000..f315d20
--- /dev/null
+++ b/Documentation/networking/ifenslave.c
@@ -0,0 +1,1110 @@
+/* Mode: C;
+ * ifenslave.c: Configure network interfaces for parallel routing.
+ *
+ * This program controls the Linux implementation of running multiple
+ * network interfaces in parallel.
+ *
+ * Author: Donald Becker <becker@cesdis.gsfc.nasa.gov>
+ * Copyright 1994-1996 Donald Becker
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+ * Center of Excellence in Space Data and Information Sciences
+ * Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+ *
+ * Changes :
+ * - 2000/10/02 Willy Tarreau <willy at meta-x.org> :
+ * - few fixes. Master's MAC address is now correctly taken from
+ * the first device when not previously set ;
+ * - detach support : call BOND_RELEASE to detach an enslaved interface.
+ * - give a mini-howto from command-line help : # ifenslave -h
+ *
+ * - 2001/02/16 Chad N. Tindel <ctindel at ieee dot org> :
+ * - Master is now brought down before setting the MAC address. In
+ * the 2.4 kernel you can't change the MAC address while the device is
+ * up because you get EBUSY.
+ *
+ * - 2001/09/13 Takao Indoh <indou dot takao at jp dot fujitsu dot com>
+ * - Added the ability to change the active interface on a mode 1 bond
+ * at runtime.
+ *
+ * - 2001/10/23 Chad N. Tindel <ctindel at ieee dot org> :
+ * - No longer set the MAC address of the master. The bond device will
+ * take care of this itself
+ * - Try the SIOC*** versions of the bonding ioctls before using the
+ * old versions
+ * - 2002/02/18 Erik Habbinga <erik_habbinga @ hp dot com> :
+ * - ifr2.ifr_flags was not initialized in the hwaddr_notset case,
+ * SIOCGIFFLAGS now called before hwaddr_notset test
+ *
+ * - 2002/10/31 Tony Cureington <tony.cureington * hp_com> :
+ * - If the master does not have a hardware address when the first slave
+ * is enslaved, the master is assigned the hardware address of that
+ * slave - there is a comment in bonding.c stating "ifenslave takes
+ * care of this now." This corrects the problem of slaves having
+ * different hardware addresses in active-backup mode when
+ * multiple interfaces are specified on a single ifenslave command
+ * (ifenslave bond0 eth0 eth1).
+ *
+ * - 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
+ * Shmulik Hen <shmulik.hen at intel dot com>
+ * - Moved setting the slave's mac address and openning it, from
+ * the application to the driver. This enables support of modes
+ * that need to use the unique mac address of each slave.
+ * The driver also takes care of closing the slave and restoring its
+ * original mac address upon release.
+ * In addition, block possibility of enslaving before the master is up.
+ * This prevents putting the system in an undefined state.
+ *
+ * - 2003/05/01 - Amir Noam <amir.noam at intel dot com>
+ * - Added ABI version control to restore compatibility between
+ * new/old ifenslave and new/old bonding.
+ * - Prevent adding an adapter that is already a slave.
+ * Fixes the problem of stalling the transmission and leaving
+ * the slave in a down state.
+ *
+ * - 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Prevent enslaving if the bond device is down.
+ * Fixes the problem of leaving the system in unstable state and
+ * halting when trying to remove the module.
+ * - Close socket on all abnormal exists.
+ * - Add versioning scheme that follows that of the bonding driver.
+ * current version is 1.0.0 as a base line.
+ *
+ * - 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com>
+ * - ifenslave -c was broken; it's now fixed
+ * - Fixed problem with routes vanishing from master during enslave
+ * processing.
+ *
+ * - 2003/05/27 - Amir Noam <amir.noam at intel dot com>
+ * - Fix backward compatibility issues:
+ * For drivers not using ABI versions, slave was set down while
+ * it should be left up before enslaving.
+ * Also, master was not set down and the default set_mac_address()
+ * would fail and generate an error message in the system log.
+ * - For opt_c: slave should not be set to the master's setting
+ * while it is running. It was already set during enslave. To
+ * simplify things, it is now handeled separately.
+ *
+ * - 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
+ * - Code cleanup and style changes
+ * set version to 1.1.0
+ */
+
+#define APP_VERSION "1.1.0"
+#define APP_RELDATE "December 1, 2003"
+#define APP_NAME "ifenslave"
+
+static char *version =
+APP_NAME ".c:v" APP_VERSION " (" APP_RELDATE ")\n"
+"o Donald Becker (becker@cesdis.gsfc.nasa.gov).\n"
+"o Detach support added on 2000/10/02 by Willy Tarreau (willy at meta-x.org).\n"
+"o 2.4 kernel support added on 2001/02/16 by Chad N. Tindel\n"
+" (ctindel at ieee dot org).\n";
+
+static const char *usage_msg =
+"Usage: ifenslave [-f] <master-if> <slave-if> [<slave-if>...]\n"
+" ifenslave -d <master-if> <slave-if> [<slave-if>...]\n"
+" ifenslave -c <master-if> <slave-if>\n"
+" ifenslave --help\n";
+
+static const char *help_msg =
+"\n"
+" To create a bond device, simply follow these three steps :\n"
+" - ensure that the required drivers are properly loaded :\n"
+" # modprobe bonding ; modprobe <3c59x|eepro100|pcnet32|tulip|...>\n"
+" - assign an IP address to the bond device :\n"
+" # ifconfig bond0 <addr> netmask <mask> broadcast <bcast>\n"
+" - attach all the interfaces you need to the bond device :\n"
+" # ifenslave [{-f|--force}] bond0 eth0 [eth1 [eth2]...]\n"
+" If bond0 didn't have a MAC address, it will take eth0's. Then, all\n"
+" interfaces attached AFTER this assignment will get the same MAC addr.\n"
+" (except for ALB/TLB modes)\n"
+"\n"
+" To set the bond device down and automatically release all the slaves :\n"
+" # ifconfig bond0 down\n"
+"\n"
+" To detach a dead interface without setting the bond device down :\n"
+" # ifenslave {-d|--detach} bond0 eth0 [eth1 [eth2]...]\n"
+"\n"
+" To change active slave :\n"
+" # ifenslave {-c|--change-active} bond0 eth0\n"
+"\n"
+" To show master interface info\n"
+" # ifenslave bond0\n"
+"\n"
+" To show all interfaces info\n"
+" # ifenslave {-a|--all-interfaces}\n"
+"\n"
+" To be more verbose\n"
+" # ifenslave {-v|--verbose} ...\n"
+"\n"
+" # ifenslave {-u|--usage} Show usage\n"
+" # ifenslave {-V|--version} Show version\n"
+" # ifenslave {-h|--help} This message\n"
+"\n";
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <linux/if.h>
+#include <net/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/if_bonding.h>
+#include <linux/sockios.h>
+
+typedef unsigned long long u64; /* hack, so we may include kernel's ethtool.h */
+typedef __uint32_t u32; /* ditto */
+typedef __uint16_t u16; /* ditto */
+typedef __uint8_t u8; /* ditto */
+#include <linux/ethtool.h>
+
+struct option longopts[] = {
+ /* { name has_arg *flag val } */
+ {"all-interfaces", 0, 0, 'a'}, /* Show all interfaces. */
+ {"change-active", 0, 0, 'c'}, /* Change the active slave. */
+ {"detach", 0, 0, 'd'}, /* Detach a slave interface. */
+ {"force", 0, 0, 'f'}, /* Force the operation. */
+ {"help", 0, 0, 'h'}, /* Give help */
+ {"usage", 0, 0, 'u'}, /* Give usage */
+ {"verbose", 0, 0, 'v'}, /* Report each action taken. */
+ {"version", 0, 0, 'V'}, /* Emit version information. */
+ { 0, 0, 0, 0}
+};
+
+/* Command-line flags. */
+unsigned int
+opt_a = 0, /* Show-all-interfaces flag. */
+opt_c = 0, /* Change-active-slave flag. */
+opt_d = 0, /* Detach a slave interface. */
+opt_f = 0, /* Force the operation. */
+opt_h = 0, /* Help */
+opt_u = 0, /* Usage */
+opt_v = 0, /* Verbose flag. */
+opt_V = 0; /* Version */
+
+int skfd = -1; /* AF_INET socket for ioctl() calls.*/
+int abi_ver = 0; /* userland - kernel ABI version */
+int hwaddr_set = 0; /* Master's hwaddr is set */
+int saved_errno;
+
+struct ifreq master_mtu, master_flags, master_hwaddr;
+struct ifreq slave_mtu, slave_flags, slave_hwaddr;
+
+struct dev_ifr {
+ struct ifreq *req_ifr;
+ char *req_name;
+ int req_type;
+};
+
+struct dev_ifr master_ifra[] = {
+ {&master_mtu, "SIOCGIFMTU", SIOCGIFMTU},
+ {&master_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
+ {&master_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
+ {NULL, "", 0}
+};
+
+struct dev_ifr slave_ifra[] = {
+ {&slave_mtu, "SIOCGIFMTU", SIOCGIFMTU},
+ {&slave_flags, "SIOCGIFFLAGS", SIOCGIFFLAGS},
+ {&slave_hwaddr, "SIOCGIFHWADDR", SIOCGIFHWADDR},
+ {NULL, "", 0}
+};
+
+static void if_print(char *ifname);
+static int get_drv_info(char *master_ifname);
+static int get_if_settings(char *ifname, struct dev_ifr ifra[]);
+static int get_slave_flags(char *slave_ifname);
+static int set_master_hwaddr(char *master_ifname, struct sockaddr *hwaddr);
+static int set_slave_hwaddr(char *slave_ifname, struct sockaddr *hwaddr);
+static int set_slave_mtu(char *slave_ifname, int mtu);
+static int set_if_flags(char *ifname, short flags);
+static int set_if_up(char *ifname, short flags);
+static int set_if_down(char *ifname, short flags);
+static int clear_if_addr(char *ifname);
+static int set_if_addr(char *master_ifname, char *slave_ifname);
+static int change_active(char *master_ifname, char *slave_ifname);
+static int enslave(char *master_ifname, char *slave_ifname);
+static int release(char *master_ifname, char *slave_ifname);
+#define v_print(fmt, args...) \
+ if (opt_v) \
+ fprintf(stderr, fmt, ## args )
+
+int main(int argc, char *argv[])
+{
+ char **spp, *master_ifname, *slave_ifname;
+ int c, i, rv;
+ int res = 0;
+ int exclusive = 0;
+
+ while ((c = getopt_long(argc, argv, "acdfhuvV", longopts, 0)) != EOF) {
+ switch (c) {
+ case 'a': opt_a++; exclusive++; break;
+ case 'c': opt_c++; exclusive++; break;
+ case 'd': opt_d++; exclusive++; break;
+ case 'f': opt_f++; exclusive++; break;
+ case 'h': opt_h++; exclusive++; break;
+ case 'u': opt_u++; exclusive++; break;
+ case 'v': opt_v++; break;
+ case 'V': opt_V++; exclusive++; break;
+
+ case '?':
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
+ }
+
+ /* options check */
+ if (exclusive > 1) {
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
+
+ if (opt_v || opt_V) {
+ printf(version);
+ if (opt_V) {
+ res = 0;
+ goto out;
+ }
+ }
+
+ if (opt_u) {
+ printf(usage_msg);
+ res = 0;
+ goto out;
+ }
+
+ if (opt_h) {
+ printf(usage_msg);
+ printf(help_msg);
+ res = 0;
+ goto out;
+ }
+
+ /* Open a basic socket */
+ if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ perror("socket");
+ res = 1;
+ goto out;
+ }
+
+ if (opt_a) {
+ if (optind == argc) {
+ /* No remaining args */
+ /* show all interfaces */
+ if_print((char *)NULL);
+ goto out;
+ } else {
+ /* Just show usage */
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
+ }
+
+ /* Copy the interface name */
+ spp = argv + optind;
+ master_ifname = *spp++;
+
+ if (master_ifname == NULL) {
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
+
+ /* exchange abi version with bonding module */
+ res = get_drv_info(master_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Master '%s': Error: handshake with driver failed. "
+ "Aborting\n",
+ master_ifname);
+ goto out;
+ }
+
+ slave_ifname = *spp++;
+
+ if (slave_ifname == NULL) {
+ if (opt_d || opt_c) {
+ fprintf(stderr, usage_msg);
+ res = 2;
+ goto out;
+ }
+
+ /* A single arg means show the
+ * configuration for this interface
+ */
+ if_print(master_ifname);
+ goto out;
+ }
+
+ res = get_if_settings(master_ifname, master_ifra);
+ if (res) {
+ /* Probably a good reason not to go on */
+ fprintf(stderr,
+ "Master '%s': Error: get settings failed: %s. "
+ "Aborting\n",
+ master_ifname, strerror(res));
+ goto out;
+ }
+
+ /* check if master is indeed a master;
+ * if not then fail any operation
+ */
+ if (!(master_flags.ifr_flags & IFF_MASTER)) {
+ fprintf(stderr,
+ "Illegal operation; the specified interface '%s' "
+ "is not a master. Aborting\n",
+ master_ifname);
+ res = 1;
+ goto out;
+ }
+
+ /* check if master is up; if not then fail any operation */
+ if (!(master_flags.ifr_flags & IFF_UP)) {
+ fprintf(stderr,
+ "Illegal operation; the specified master interface "
+ "'%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 =
+ (unsigned char *)master_hwaddr.ifr_hwaddr.sa_data;
+
+ /* The family '1' is ARPHRD_ETHER for ethernet. */
+ if (master_family != 1 && !opt_f) {
+ fprintf(stderr,
+ "Illegal operation: The specified master "
+ "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++) {
+ if (hwaddr[i] != 0) {
+ hwaddr_set = 1;
+ break;
+ }
+ }
+
+ if (hwaddr_set) {
+ v_print("current hardware address of master '%s' "
+ "is %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
+ "type %d\n",
+ master_ifname,
+ 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;
+
+ strcpy(ifr.ifr_name, ifname);
+ if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
+ mtu = 0;
+ else
+ mtu = ifr.ifr_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.
+ */
+ res = set_if_addr(master_ifname, slave_ifname);
+ if (res) {
+ fprintf(stderr,
+ "Slave '%s': Error: set address failed\n",
+ slave_ifname);
+ return res;
+ }
+ } 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 it's 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));
+
+ return res;
+ }
+
+ ipaddr = 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:
+ */
+