[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/networking/ifenslave.c b/ap/app/busybox/src/networking/ifenslave.c
new file mode 100644
index 0000000..c3be818
--- /dev/null
+++ b/ap/app/busybox/src/networking/ifenslave.c
@@ -0,0 +1,617 @@
+/* Mode: C;
+ *
+ * Mini ifenslave implementation for busybox
+ * Copyright (C) 2005 by Marc Leeman <marc.leeman@barco.com>
+ *
+ * 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
+ */
+
+//usage:#define ifenslave_trivial_usage
+//usage: "[-cdf] MASTER_IFACE SLAVE_IFACE..."
+//usage:#define ifenslave_full_usage "\n\n"
+//usage: "Configure network interfaces for parallel routing\n"
+//usage: "\n -c,--change-active Change active slave"
+//usage: "\n -d,--detach Remove slave interface from bonding device"
+//usage: "\n -f,--force Force, even if interface is not Ethernet"
+/* //usage: "\n -r,--receive-slave Create a receive-only slave" */
+//usage:
+//usage:#define ifenslave_example_usage
+//usage: "To create a bond device, simply follow these three steps:\n"
+//usage: "- ensure that the required drivers are properly loaded:\n"
+//usage: " # modprobe bonding ; modprobe <3c59x|eepro100|pcnet32|tulip|...>\n"
+//usage: "- assign an IP address to the bond device:\n"
+//usage: " # ifconfig bond0 <addr> netmask <mask> broadcast <bcast>\n"
+//usage: "- attach all the interfaces you need to the bond device:\n"
+//usage: " # ifenslave bond0 eth0 eth1 eth2\n"
+//usage: " If bond0 didn't have a MAC address, it will take eth0's. Then, all\n"
+//usage: " interfaces attached AFTER this assignment will get the same MAC addr.\n\n"
+//usage: " To detach a dead interface without setting the bond device down:\n"
+//usage: " # ifenslave -d bond0 eth1\n\n"
+//usage: " To set the bond device down and automatically release all the slaves:\n"
+//usage: " # ifconfig bond0 down\n\n"
+//usage: " To change active slave:\n"
+//usage: " # ifenslave -c bond0 eth0\n"
+
+#include "libbb.h"
+
+/* #include <net/if.h> - no. linux/if_bonding.h pulls in linux/if.h */
+#include <linux/if.h>
+//#include <net/if_arp.h> - not needed?
+#include <linux/if_bonding.h>
+#include <linux/sockios.h>
+#include "fix_u32.h" /* hack, so we may include kernel's ethtool.h */
+#include <linux/ethtool.h>
+#ifndef BOND_ABI_VERSION
+# define BOND_ABI_VERSION 2
+#endif
+#ifndef IFNAMSIZ
+# define IFNAMSIZ 16
+#endif
+
+
+struct dev_data {
+ struct ifreq mtu, flags, hwaddr;
+};
+
+
+enum { skfd = 3 }; /* AF_INET socket for ioctl() calls. */
+struct globals {
+ unsigned abi_ver; /* userland - kernel ABI version */
+ smallint hwaddr_set; /* Master's hwaddr is set */
+ struct dev_data master;
+ struct dev_data slave;
+};
+#define G (*ptr_to_globals)
+#define abi_ver (G.abi_ver )
+#define hwaddr_set (G.hwaddr_set)
+#define master (G.master )
+#define slave (G.slave )
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+} while (0)
+
+
+/* NOINLINEs are placed where it results in smaller code (gcc 4.3.1) */
+
+static int ioctl_on_skfd(unsigned request, struct ifreq *ifr)
+{
+ return ioctl(skfd, request, ifr);
+}
+
+static int set_ifrname_and_do_ioctl(unsigned request, struct ifreq *ifr, const char *ifname)
+{
+ strncpy_IFNAMSIZ(ifr->ifr_name, ifname);
+ return ioctl_on_skfd(request, ifr);
+}
+
+static int get_if_settings(char *ifname, struct dev_data *dd)
+{
+ int res;
+
+ res = set_ifrname_and_do_ioctl(SIOCGIFMTU, &dd->mtu, ifname);
+ res |= set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &dd->flags, ifname);
+ res |= set_ifrname_and_do_ioctl(SIOCGIFHWADDR, &dd->hwaddr, ifname);
+
+ return res;
+}
+
+static int get_slave_flags(char *slave_ifname)
+{
+ return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
+}
+
+static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
+{
+ struct ifreq ifr;
+
+ memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
+ return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
+}
+
+static int set_mtu(char *ifname, int mtu)
+{
+ struct ifreq ifr;
+
+ ifr.ifr_mtu = mtu;
+ return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, ifname);
+}
+
+static int set_if_flags(char *ifname, int flags)
+{
+ struct ifreq ifr;
+
+ ifr.ifr_flags = flags;
+ return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
+}
+
+static int set_if_up(char *ifname, int flags)
+{
+ int res = set_if_flags(ifname, flags | IFF_UP);
+ if (res)
+ bb_perror_msg("%s: can't up", ifname);
+ return res;
+}
+
+static int set_if_down(char *ifname, int flags)
+{
+ int res = set_if_flags(ifname, flags & ~IFF_UP);
+ if (res)
+ bb_perror_msg("%s: can't down", ifname);
+ return res;
+}
+
+static int clear_if_addr(char *ifname)
+{
+ struct ifreq ifr;
+
+ ifr.ifr_addr.sa_family = AF_INET;
+ memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
+ return set_ifrname_and_do_ioctl(SIOCSIFADDR, &ifr, ifname);
+}
+
+static int set_if_addr(char *master_ifname, char *slave_ifname)
+{
+#if (SIOCGIFADDR | SIOCSIFADDR \
+ | SIOCGIFDSTADDR | SIOCSIFDSTADDR \
+ | SIOCGIFBRDADDR | SIOCSIFBRDADDR \
+ | SIOCGIFNETMASK | SIOCSIFNETMASK) <= 0xffff
+#define INT uint16_t
+#else
+#define INT int
+#endif
+ static const struct {
+ INT g_ioctl;
+ INT s_ioctl;
+ } ifra[] = {
+ { SIOCGIFADDR, SIOCSIFADDR },
+ { SIOCGIFDSTADDR, SIOCSIFDSTADDR },
+ { SIOCGIFBRDADDR, SIOCSIFBRDADDR },
+ { SIOCGIFNETMASK, SIOCSIFNETMASK },
+ };
+
+ struct ifreq ifr;
+ int res;
+ unsigned i;
+
+ for (i = 0; i < ARRAY_SIZE(ifra); i++) {
+ res = set_ifrname_and_do_ioctl(ifra[i].g_ioctl, &ifr, master_ifname);
+ if (res < 0) {
+ ifr.ifr_addr.sa_family = AF_INET;
+ memset(ifr.ifr_addr.sa_data, 0,
+ sizeof(ifr.ifr_addr.sa_data));
+ }
+
+ res = set_ifrname_and_do_ioctl(ifra[i].s_ioctl, &ifr, slave_ifname);
+ if (res < 0)
+ return res;
+ }
+
+ return 0;
+}
+
+static void change_active(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+
+ if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
+ bb_error_msg_and_die("%s is not a slave", slave_ifname);
+ }
+
+ strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
+ if (set_ifrname_and_do_ioctl(SIOCBONDCHANGEACTIVE, &ifr, master_ifname)
+ && ioctl_on_skfd(BOND_CHANGE_ACTIVE_OLD, &ifr)
+ ) {
+ bb_perror_msg_and_die(
+ "master %s, slave %s: can't "
+ "change active",
+ master_ifname, slave_ifname);
+ }
+}
+
+static NOINLINE int enslave(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res;
+
+ if (slave.flags.ifr_flags & IFF_SLAVE) {
+ bb_error_msg(
+ "%s is already a slave",
+ slave_ifname);
+ return 1;
+ }
+
+ res = set_if_down(slave_ifname, slave.flags.ifr_flags);
+ if (res)
+ 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) {
+ bb_perror_msg("%s: can't set address", slave_ifname);
+ return res;
+ }
+ } else {
+ res = clear_if_addr(slave_ifname);
+ if (res) {
+ bb_perror_msg("%s: can't clear address", slave_ifname);
+ return res;
+ }
+ }
+
+ if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
+ res = set_mtu(slave_ifname, master.mtu.ifr_mtu);
+ if (res) {
+ bb_perror_msg("%s: can't set MTU", 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
+ */
+ if (set_hwaddr(slave_ifname, &(master.hwaddr.ifr_hwaddr))) {
+ bb_perror_msg("%s: can't set hw address",
+ slave_ifname);
+ goto undo_mtu;
+ }
+
+ /* For old ABI the application needs to bring the
+ * slave back up
+ */
+ if (set_if_up(slave_ifname, slave.flags.ifr_flags))
+ 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
+ */
+ if (set_if_down(master_ifname, master.flags.ifr_flags))
+ goto undo_mtu;
+ }
+
+ if (set_hwaddr(master_ifname, &(slave.hwaddr.ifr_hwaddr))) {
+ bb_error_msg("%s: can't set hw address",
+ master_ifname);
+ goto undo_mtu;
+ }
+
+ if (abi_ver < 1) {
+ /* For old ABI, bring the master
+ * back up
+ */
+ if (set_if_up(master_ifname, master.flags.ifr_flags))
+ goto undo_master_mac;
+ }
+
+ hwaddr_set = 1;
+ }
+
+ /* Do the real thing */
+ strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
+ if (set_ifrname_and_do_ioctl(SIOCBONDENSLAVE, &ifr, master_ifname)
+ && ioctl_on_skfd(BOND_ENSLAVE_OLD, &ifr)
+ ) {
+ goto undo_master_mac;
+ }
+
+ return 0;
+
+/* rollback (best effort) */
+ undo_master_mac:
+ set_hwaddr(master_ifname, &(master.hwaddr.ifr_hwaddr));
+ hwaddr_set = 0;
+ goto undo_mtu;
+
+ undo_slave_mac:
+ set_hwaddr(slave_ifname, &(slave.hwaddr.ifr_hwaddr));
+ undo_mtu:
+ set_mtu(slave_ifname, slave.mtu.ifr_mtu);
+ return 1;
+}
+
+static int release(char *master_ifname, char *slave_ifname)
+{
+ struct ifreq ifr;
+ int res = 0;
+
+ if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
+ bb_error_msg("%s is not a slave", slave_ifname);
+ return 1;
+ }
+
+ strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
+ if (set_ifrname_and_do_ioctl(SIOCBONDRELEASE, &ifr, master_ifname) < 0
+ && ioctl_on_skfd(BOND_RELEASE_OLD, &ifr) < 0
+ ) {
+ return 1;
+ }
+ 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);
+ }
+
+ /* set to default mtu */
+ set_mtu(slave_ifname, 1500);
+
+ return res;
+}
+
+static NOINLINE void get_drv_info(char *master_ifname)
+{
+ struct ifreq ifr;
+ struct ethtool_drvinfo info;
+
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_data = (caddr_t)&info;
+ info.cmd = ETHTOOL_GDRVINFO;
+ /* both fields are 32 bytes long (long enough) */
+ strcpy(info.driver, "ifenslave");
+ strcpy(info.fw_version, utoa(BOND_ABI_VERSION));
+ if (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 0) {
+ if (errno == EOPNOTSUPP)
+ return;
+ bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
+ }
+
+ abi_ver = bb_strtou(info.fw_version, NULL, 0);
+ if (errno)
+ bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
+}
+
+int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ifenslave_main(int argc UNUSED_PARAM, char **argv)
+{
+ char *master_ifname, *slave_ifname;
+ int rv;
+ int res;
+ unsigned opt;
+ enum {
+ OPT_c = (1 << 0),
+ OPT_d = (1 << 1),
+ OPT_f = (1 << 2),
+ };
+#if ENABLE_LONG_OPTS
+ static const char ifenslave_longopts[] ALIGN1 =
+ "change-active\0" No_argument "c"
+ "detach\0" No_argument "d"
+ "force\0" No_argument "f"
+ /* "all-interfaces\0" No_argument "a" */
+ ;
+
+ applet_long_options = ifenslave_longopts;
+#endif
+ INIT_G();
+
+ opt = getopt32(argv, "cdfa");
+ argv += optind;
+ if (opt & (opt-1)) /* Only one option can be given */
+ bb_show_usage();
+
+ master_ifname = *argv++;
+
+ /* No interface names - show all interfaces. */
+ if (!master_ifname) {
+ display_interfaces(NULL);
+ return EXIT_SUCCESS;
+ }
+
+ /* Open a basic socket */
+ xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), skfd);
+
+ /* Exchange abi version with bonding module */
+ get_drv_info(master_ifname);
+
+ slave_ifname = *argv++;
+ if (!slave_ifname) {
+ if (opt & (OPT_d|OPT_c)) {
+ /* --change or --detach, and no slaves given -
+ * show all interfaces. */
+ display_interfaces(slave_ifname /* == NULL */);
+ return 2; /* why 2? */
+ }
+ /* A single arg means show the
+ * configuration for this interface
+ */
+ display_interfaces(master_ifname);
+ return EXIT_SUCCESS;
+ }
+
+ if (get_if_settings(master_ifname, &master)) {
+ /* Probably a good reason not to go on */
+ bb_perror_msg_and_die("%s: can't get settings", master_ifname);
+ }
+
+ /* Check if master is indeed a master;
+ * if not then fail any operation
+ */
+ if (!(master.flags.ifr_flags & IFF_MASTER))
+ bb_error_msg_and_die("%s is not a master", master_ifname);
+
+ /* Check if master is up; if not then fail any operation */
+ if (!(master.flags.ifr_flags & IFF_UP))
+ bb_error_msg_and_die("%s is not up", master_ifname);
+
+#ifdef WHY_BOTHER
+ /* Neither -c[hange] nor -d[etach] -> it's "enslave" then;
+ * and -f[orce] is not there too. Check that it's ethernet. */
+ if (!(opt & (OPT_d|OPT_c|OPT_f))) {
+ /* The family '1' is ARPHRD_ETHER for ethernet. */
+ if (master.hwaddr.ifr_hwaddr.sa_family != 1) {
+ bb_error_msg_and_die(
+ "%s is not ethernet-like (-f overrides)",
+ master_ifname);
+ }
+ }
+#endif
+
+ /* Accepts only one slave */
+ if (opt & OPT_c) {
+ /* Change active slave */
+ if (get_slave_flags(slave_ifname)) {
+ bb_perror_msg_and_die(
+ "%s: can't get flags", slave_ifname);
+ }
+ change_active(master_ifname, slave_ifname);
+ return EXIT_SUCCESS;
+ }
+
+ /* Accepts multiple slaves */
+ res = 0;
+ do {
+ if (opt & 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 */
+ bb_perror_msg(
+ "skipping %s: can't get flags",
+ slave_ifname);
+ res = rv;
+ continue;
+ }
+ rv = release(master_ifname, slave_ifname);
+ if (rv) {
+ bb_perror_msg("can't release %s from %s",
+ slave_ifname, master_ifname);
+ res = rv;
+ }
+ } else {
+ /* Attach a slave interface to the master */
+ rv = get_if_settings(slave_ifname, &slave);
+ if (rv) {
+ /* Can't work with this slave, */
+ /* remember the error and skip it */
+ bb_perror_msg(
+ "skipping %s: can't get settings",
+ slave_ifname);
+ res = rv;
+ continue;
+ }
+ rv = enslave(master_ifname, slave_ifname);
+ if (rv) {
+ bb_perror_msg("can't enslave %s to %s",
+ slave_ifname, master_ifname);
+ res = rv;
+ }
+ }
+ } while ((slave_ifname = *argv++) != NULL);
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(skfd);
+ }
+
+ return res;
+}