* 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_arp.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>
-
-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 "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 {
} while (0)
-static void get_drv_info(char *master_ifname);
-static int get_if_settings(char *ifname, struct dev_data *dd);
-static int get_slave_flags(char *slave_ifname);
-static int set_hwaddr(char *ifname, struct sockaddr *hwaddr);
-static int set_mtu(char *ifname, int mtu);
-static int set_if_flags(char *ifname, int flags);
-static int set_if_up(char *ifname, int flags);
-static int set_if_down(char *ifname, int flags);
-static int clear_if_addr(char *ifname);
-static int set_if_addr(char *master_ifname, char *slave_ifname);
-static void 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);
-
-static void strncpy_IFNAMSIZ(char *dst, const char *src)
-{
- strncpy(dst, src, IFNAMSIZ);
-}
+/* NOINLINEs are placed where it results in smaller code (gcc 4.3.1) */
static int ioctl_on_skfd(unsigned request, struct ifreq *ifr)
{
static int set_ifrname_and_do_ioctl(unsigned request, struct ifreq *ifr, const char *ifname)
{
- strncpy_IFNAMSIZ(ifr->ifr_name, ifname);
+ strncpy_IFNAMSIZ(ifr->ifr_name, ifname);
return ioctl_on_skfd(request, ifr);
}
-int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
+static int get_if_settings(char *ifname, struct dev_data *dd)
{
- 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_GETOPT_LONG
- static const char ifenslave_longopts[] ALIGN1 =
- "change-active\0" No_argument "c"
- "detach\0" No_argument "d"
- "force\0" No_argument "f"
- ;
-
- applet_long_options = ifenslave_longopts;
-#endif
- INIT_G();
-
- opt = getopt32(argv, "cdf");
- argv += optind;
- if (opt & (opt-1)) /* options check */
- bb_show_usage();
- master_ifname = *argv++;
+ 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);
- /* No interface names - show all interfaces. */
- if (!master_ifname) {
- display_interfaces(NULL);
- return EXIT_SUCCESS;
- }
+ return res;
+}
- /* Open a basic socket */
- xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), skfd);
+static int get_slave_flags(char *slave_ifname)
+{
+ return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
+}
- /* Exchange abi version with bonding module */
- get_drv_info(master_ifname);
+static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
+{
+ struct ifreq ifr;
- 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;
- }
+ memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
+ return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
+}
- res = get_if_settings(master_ifname, &master);
- if (res) {
- /* Probably a good reason not to go on */
- bb_perror_msg_and_die("%s: can't get settings", master_ifname);
- }
+static int set_mtu(char *ifname, int mtu)
+{
+ struct ifreq ifr;
- /* 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);
+ ifr.ifr_mtu = mtu;
+ return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, 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);
+static int set_if_flags(char *ifname, int flags)
+{
+ struct ifreq ifr;
- /* No opts: neither -c[hange] nor -d[etach] -> it's "enslave" then;
- * and -f[orce] is not there too */
- if (!opt) {
- /* 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);
- }
- }
+ ifr.ifr_flags = flags;
+ return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
+}
- /* 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;
- }
+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;
+}
- /* Accept 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(
- "master %s, slave %s: "
- "can't release",
- master_ifname, slave_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(
- "master %s, slave %s: "
- "can't enslave",
- master_ifname, slave_ifname);
- res = rv;
- }
- }
- } while ((slave_ifname = *argv++) != NULL);
+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;
+}
- if (ENABLE_FEATURE_CLEAN_UP) {
- close(skfd);
- }
+static int clear_if_addr(char *ifname)
+{
+ struct ifreq ifr;
- return res;
+ 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 void get_drv_info(char *master_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;
- struct ethtool_drvinfo info;
+ int res;
+ unsigned i;
- memset(&ifr, 0, sizeof(ifr));
- 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 (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 0) {
- if (errno == EOPNOTSUPP)
- return;
- bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
+ 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;
}
- abi_ver = bb_strtou(info.fw_version, NULL, 0);
- if (errno)
- bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
+ 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);
+ bb_error_msg_and_die("%s is not a slave", slave_ifname);
}
strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
}
}
-static int enslave(char *master_ifname, char *slave_ifname)
+static NOINLINE int enslave(char *master_ifname, char *slave_ifname)
{
struct ifreq ifr;
int res;
int res = 0;
if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
- bb_error_msg("%s is not a slave",
- slave_ifname);
+ bb_error_msg("%s is not a slave", slave_ifname);
return 1;
}
return res;
}
-static int get_if_settings(char *ifname, struct dev_data *dd)
+static NOINLINE void get_drv_info(char *master_ifname)
{
- int res;
+ struct ifreq ifr;
+ struct ethtool_drvinfo info;
- 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);
+ 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);
+ }
- return res;
+ abi_ver = bb_strtou(info.fw_version, NULL, 0);
+ if (errno)
+ bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
}
-static int get_slave_flags(char *slave_ifname)
+int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ifenslave_main(int argc UNUSED_PARAM, char **argv)
{
- return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
-}
+ 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" */
+ ;
-static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
-{
- struct ifreq ifr;
+ applet_long_options = ifenslave_longopts;
+#endif
+ INIT_G();
- memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
- return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
-}
+ opt = getopt32(argv, "cdfa");
+ argv += optind;
+ if (opt & (opt-1)) /* Only one option can be given */
+ bb_show_usage();
-static int set_mtu(char *ifname, int mtu)
-{
- struct ifreq ifr;
+ master_ifname = *argv++;
- ifr.ifr_mtu = mtu;
- return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, ifname);
-}
+ /* No interface names - show all interfaces. */
+ if (!master_ifname) {
+ display_interfaces(NULL);
+ return EXIT_SUCCESS;
+ }
-static int set_if_flags(char *ifname, int flags)
-{
- struct ifreq ifr;
+ /* Open a basic socket */
+ xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), skfd);
- ifr.ifr_flags = flags;
- return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
-}
+ /* Exchange abi version with bonding module */
+ get_drv_info(master_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;
-}
+ 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;
+ }
-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;
-}
+ 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);
+ }
-static int clear_if_addr(char *ifname)
-{
- struct ifreq ifr;
+ /* 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);
- 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);
-}
+ /* 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);
-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
+#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
- 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;
+ /* 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;
+ }
- 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));
+ /* 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 %s",
+ slave_ifname, "flags");
+ 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 %s",
+ slave_ifname, "settings");
+ 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);
- res = set_ifrname_and_do_ioctl(ifra[i].s_ioctl, &ifr, slave_ifname);
- if (res < 0)
- return res;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(skfd);
}
- return 0;
+ return res;
}
projects / oweals / busybox.git / blobdiff