ifenslave: further shrink by suppressing excessive inlining
ifenslave: reorder functions to avoid forward declarations function old new delta enslave - 531 +531 get_drv_info - 176 +176 ifenslave_main 1411 671 -740 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/1 up/down: 707/-740) Total: -33 bytes text data bss dec hex filename 809737 624 7060 817421 c790d busybox_old 809704 624 7060 817388 c78ec busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
0876822ded
commit
c8fa04f9b1
@ -133,19 +133,7 @@ struct globals {
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} while (0)
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static void get_drv_info(char *master_ifname);
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static int get_if_settings(char *ifname, struct dev_data *dd);
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static int get_slave_flags(char *slave_ifname);
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static int set_hwaddr(char *ifname, struct sockaddr *hwaddr);
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static int set_mtu(char *ifname, int mtu);
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static int set_if_flags(char *ifname, int flags);
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static int set_if_up(char *ifname, int flags);
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static int set_if_down(char *ifname, int 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 void 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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/* NOINLINEs are placed where it results in smaller code (gcc 4.3.1) */
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static void strncpy_IFNAMSIZ(char *dst, const char *src)
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{
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@ -163,6 +151,302 @@ static int set_ifrname_and_do_ioctl(unsigned request, struct ifreq *ifr, const c
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return ioctl_on_skfd(request, ifr);
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}
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static int get_if_settings(char *ifname, struct dev_data *dd)
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{
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int res;
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res = set_ifrname_and_do_ioctl(SIOCGIFMTU, &dd->mtu, ifname);
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res |= set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &dd->flags, ifname);
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res |= set_ifrname_and_do_ioctl(SIOCGIFHWADDR, &dd->hwaddr, ifname);
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return res;
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}
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static int get_slave_flags(char *slave_ifname)
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{
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return set_ifrname_and_do_ioctl(SIOCGIFFLAGS, &slave.flags, slave_ifname);
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}
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static int set_hwaddr(char *ifname, struct sockaddr *hwaddr)
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{
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struct ifreq ifr;
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memcpy(&(ifr.ifr_hwaddr), hwaddr, sizeof(*hwaddr));
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return set_ifrname_and_do_ioctl(SIOCSIFHWADDR, &ifr, ifname);
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}
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static int set_mtu(char *ifname, int mtu)
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{
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struct ifreq ifr;
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ifr.ifr_mtu = mtu;
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return set_ifrname_and_do_ioctl(SIOCSIFMTU, &ifr, ifname);
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}
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static int set_if_flags(char *ifname, int flags)
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{
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struct ifreq ifr;
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ifr.ifr_flags = flags;
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return set_ifrname_and_do_ioctl(SIOCSIFFLAGS, &ifr, ifname);
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}
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static int set_if_up(char *ifname, int flags)
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{
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int res = set_if_flags(ifname, flags | IFF_UP);
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if (res)
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bb_perror_msg("%s: can't up", ifname);
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return res;
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}
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static int set_if_down(char *ifname, int flags)
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{
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int res = set_if_flags(ifname, flags & ~IFF_UP);
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if (res)
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bb_perror_msg("%s: can't down", ifname);
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return res;
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}
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static int clear_if_addr(char *ifname)
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{
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struct ifreq ifr;
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ifr.ifr_addr.sa_family = AF_INET;
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memset(ifr.ifr_addr.sa_data, 0, sizeof(ifr.ifr_addr.sa_data));
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return set_ifrname_and_do_ioctl(SIOCSIFADDR, &ifr, ifname);
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}
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static int set_if_addr(char *master_ifname, char *slave_ifname)
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{
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#if (SIOCGIFADDR | SIOCSIFADDR \
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| SIOCGIFDSTADDR | SIOCSIFDSTADDR \
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| SIOCGIFBRDADDR | SIOCSIFBRDADDR \
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| SIOCGIFNETMASK | SIOCSIFNETMASK) <= 0xffff
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#define INT uint16_t
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#else
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#define INT int
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#endif
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static const struct {
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INT g_ioctl;
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INT s_ioctl;
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} ifra[] = {
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{ SIOCGIFADDR, SIOCSIFADDR },
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{ SIOCGIFDSTADDR, SIOCSIFDSTADDR },
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{ SIOCGIFBRDADDR, SIOCSIFBRDADDR },
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{ SIOCGIFNETMASK, SIOCSIFNETMASK },
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};
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struct ifreq ifr;
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int res;
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unsigned i;
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for (i = 0; i < ARRAY_SIZE(ifra); i++) {
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res = set_ifrname_and_do_ioctl(ifra[i].g_ioctl, &ifr, master_ifname);
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if (res < 0) {
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ifr.ifr_addr.sa_family = AF_INET;
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memset(ifr.ifr_addr.sa_data, 0,
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sizeof(ifr.ifr_addr.sa_data));
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}
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res = set_ifrname_and_do_ioctl(ifra[i].s_ioctl, &ifr, slave_ifname);
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if (res < 0)
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return res;
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}
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return 0;
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}
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static void change_active(char *master_ifname, char *slave_ifname)
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{
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struct ifreq ifr;
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if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
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bb_error_msg_and_die(
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"%s is not a slave",
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slave_ifname);
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}
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strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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if (set_ifrname_and_do_ioctl(SIOCBONDCHANGEACTIVE, &ifr, master_ifname)
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&& ioctl_on_skfd(BOND_CHANGE_ACTIVE_OLD, &ifr)
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) {
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bb_perror_msg_and_die(
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"master %s, slave %s: can't "
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"change active",
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master_ifname, slave_ifname);
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}
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}
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static NOINLINE int enslave(char *master_ifname, char *slave_ifname)
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{
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struct ifreq ifr;
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int res;
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if (slave.flags.ifr_flags & IFF_SLAVE) {
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bb_error_msg(
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"%s is already a slave",
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slave_ifname);
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return 1;
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}
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res = set_if_down(slave_ifname, slave.flags.ifr_flags);
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if (res)
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return res;
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if (abi_ver < 2) {
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/* Older bonding versions would panic if the slave has no IP
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* address, so get the IP setting from the master.
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*/
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res = set_if_addr(master_ifname, slave_ifname);
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if (res) {
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bb_perror_msg("%s: can't set address", slave_ifname);
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return res;
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}
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} else {
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res = clear_if_addr(slave_ifname);
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if (res) {
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bb_perror_msg("%s: can't clear address", slave_ifname);
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return res;
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}
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}
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if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
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res = set_mtu(slave_ifname, master.mtu.ifr_mtu);
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if (res) {
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bb_perror_msg("%s: can't set MTU", slave_ifname);
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return res;
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}
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}
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if (hwaddr_set) {
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/* Master already has an hwaddr
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* so set it's hwaddr to the slave
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*/
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if (abi_ver < 1) {
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/* The driver is using an old ABI, so
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* the application sets the slave's
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* hwaddr
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*/
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if (set_hwaddr(slave_ifname, &(master.hwaddr.ifr_hwaddr))) {
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bb_perror_msg("%s: can't set hw address",
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slave_ifname);
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goto undo_mtu;
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}
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/* For old ABI the application needs to bring the
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* slave back up
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*/
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if (set_if_up(slave_ifname, slave.flags.ifr_flags))
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goto undo_slave_mac;
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}
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/* The driver is using a new ABI,
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* so the driver takes care of setting
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* the slave's hwaddr and bringing
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* it up again
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*/
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} else {
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/* No hwaddr for master yet, so
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* set the slave's hwaddr to it
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*/
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if (abi_ver < 1) {
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/* For old ABI, the master needs to be
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* down before setting it's hwaddr
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*/
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if (set_if_down(master_ifname, master.flags.ifr_flags))
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goto undo_mtu;
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}
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if (set_hwaddr(master_ifname, &(slave.hwaddr.ifr_hwaddr))) {
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bb_error_msg("%s: can't set hw address",
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master_ifname);
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goto undo_mtu;
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}
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if (abi_ver < 1) {
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/* For old ABI, bring the master
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* back up
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*/
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if (set_if_up(master_ifname, master.flags.ifr_flags))
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goto undo_master_mac;
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}
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hwaddr_set = 1;
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}
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/* Do the real thing */
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strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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if (set_ifrname_and_do_ioctl(SIOCBONDENSLAVE, &ifr, master_ifname)
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&& ioctl_on_skfd(BOND_ENSLAVE_OLD, &ifr)
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) {
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goto undo_master_mac;
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}
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return 0;
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/* rollback (best effort) */
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undo_master_mac:
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set_hwaddr(master_ifname, &(master.hwaddr.ifr_hwaddr));
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hwaddr_set = 0;
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goto undo_mtu;
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undo_slave_mac:
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set_hwaddr(slave_ifname, &(slave.hwaddr.ifr_hwaddr));
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undo_mtu:
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set_mtu(slave_ifname, slave.mtu.ifr_mtu);
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return 1;
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}
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static int release(char *master_ifname, char *slave_ifname)
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{
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struct ifreq ifr;
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int res = 0;
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if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
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bb_error_msg("%s is not a slave",
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slave_ifname);
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return 1;
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}
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strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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if (set_ifrname_and_do_ioctl(SIOCBONDRELEASE, &ifr, master_ifname) < 0
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&& ioctl_on_skfd(BOND_RELEASE_OLD, &ifr) < 0
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) {
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return 1;
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}
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if (abi_ver < 1) {
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/* The driver is using an old ABI, so we'll set the interface
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* down to avoid any conflicts due to same MAC/IP
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*/
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res = set_if_down(slave_ifname, slave.flags.ifr_flags);
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}
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/* set to default mtu */
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set_mtu(slave_ifname, 1500);
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return res;
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}
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static NOINLINE void get_drv_info(char *master_ifname)
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{
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struct ifreq ifr;
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struct ethtool_drvinfo info;
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memset(&ifr, 0, sizeof(ifr));
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ifr.ifr_data = (caddr_t)&info;
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info.cmd = ETHTOOL_GDRVINFO;
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strncpy(info.driver, "ifenslave", 32);
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snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
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if (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 0) {
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if (errno == EOPNOTSUPP)
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return;
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bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
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}
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abi_ver = bb_strtou(info.fw_version, NULL, 0);
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if (errno)
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bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
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}
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int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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@ -310,299 +594,3 @@ int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
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return res;
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}
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static void get_drv_info(char *master_ifname)
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{
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struct ifreq ifr;
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struct ethtool_drvinfo info;
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memset(&ifr, 0, sizeof(ifr));
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ifr.ifr_data = (caddr_t)&info;
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info.cmd = ETHTOOL_GDRVINFO;
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strncpy(info.driver, "ifenslave", 32);
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snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION);
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if (set_ifrname_and_do_ioctl(SIOCETHTOOL, &ifr, master_ifname) < 0) {
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if (errno == EOPNOTSUPP)
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return;
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bb_perror_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
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}
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abi_ver = bb_strtou(info.fw_version, NULL, 0);
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if (errno)
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bb_error_msg_and_die("%s: SIOCETHTOOL error", master_ifname);
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}
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static void change_active(char *master_ifname, char *slave_ifname)
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{
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struct ifreq ifr;
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|
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if (!(slave.flags.ifr_flags & IFF_SLAVE)) {
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bb_error_msg_and_die(
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"%s is not a slave",
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slave_ifname);
|
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}
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strncpy_IFNAMSIZ(ifr.ifr_slave, slave_ifname);
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if (set_ifrname_and_do_ioctl(SIOCBONDCHANGEACTIVE, &ifr, master_ifname)
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&& ioctl_on_skfd(BOND_CHANGE_ACTIVE_OLD, &ifr)
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) {
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bb_perror_msg_and_die(
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"master %s, slave %s: can't "
|
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"change active",
|
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master_ifname, slave_ifname);
|
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}
|
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}
|
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|
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static int enslave(char *master_ifname, char *slave_ifname)
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{
|
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struct ifreq ifr;
|
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int res;
|
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|
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if (slave.flags.ifr_flags & IFF_SLAVE) {
|
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bb_error_msg(
|
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"%s is already a slave",
|
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slave_ifname);
|
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return 1;
|
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}
|
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|
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res = set_if_down(slave_ifname, slave.flags.ifr_flags);
|
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if (res)
|
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return res;
|
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|
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if (abi_ver < 2) {
|
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/* Older bonding versions would panic if the slave has no IP
|
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* address, so get the IP setting from the master.
|
||||
*/
|
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res = set_if_addr(master_ifname, slave_ifname);
|
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if (res) {
|
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bb_perror_msg("%s: can't set address", slave_ifname);
|
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return res;
|
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}
|
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} else {
|
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res = clear_if_addr(slave_ifname);
|
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if (res) {
|
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bb_perror_msg("%s: can't clear address", slave_ifname);
|
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return res;
|
||||
}
|
||||
}
|
||||
|
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if (master.mtu.ifr_mtu != slave.mtu.ifr_mtu) {
|
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res = set_mtu(slave_ifname, master.mtu.ifr_mtu);
|
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if (res) {
|
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bb_perror_msg("%s: can't set MTU", slave_ifname);
|
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return res;
|
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}
|
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}
|
||||
|
||||
if (hwaddr_set) {
|
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/* 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))) {
|
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bb_perror_msg("%s: can't set hw address",
|
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slave_ifname);
|
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goto undo_mtu;
|
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}
|
||||
|
||||
/* For old ABI the application needs to bring the
|
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* slave back up
|
||||
*/
|
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if (set_if_up(slave_ifname, slave.flags.ifr_flags))
|
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goto undo_slave_mac;
|
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}
|
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/* The driver is using a new ABI,
|
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* so the driver takes care of setting
|
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* the slave's hwaddr and bringing
|
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* it up again
|
||||
*/
|
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} 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
|
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* down before setting it's hwaddr
|
||||
*/
|
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if (set_if_down(master_ifname, master.flags.ifr_flags))
|
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goto undo_mtu;
|
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}
|
||||
|
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if (set_hwaddr(master_ifname, &(slave.hwaddr.ifr_hwaddr))) {
|
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bb_error_msg("%s: can't set hw address",
|
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master_ifname);
|
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goto undo_mtu;
|
||||
}
|
||||
|
||||
if (abi_ver < 1) {
|
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/* For old ABI, bring the master
|
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* back up
|
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*/
|
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if (set_if_up(master_ifname, master.flags.ifr_flags))
|
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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 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;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user