Port Linuxulator to IfAPI
Reviewed by: dchagin Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D38349
This commit is contained in:
Justin Hibbits
parent
68b47dcbe3
commit
52d984831d
@ -241,6 +241,36 @@ bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
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}
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}
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struct ifname_linux_to_bsd_cb_s {
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if_t ifp;
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const char *lxname;
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int unit;
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int index;
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bool is_lo;
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bool is_eth;
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};
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static int
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ifname_linux_to_bsd_cb(if_t ifp, void *arg)
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{
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struct ifname_linux_to_bsd_cb_s *cbs = arg;
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/*
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* Allow Linux programs to use FreeBSD names. Don't presume
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* we never have an interface named "eth", so don't make
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* the test optional based on is_eth.
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*/
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cbs->ifp = ifp;
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if (strncmp(if_name(ifp), cbs->lxname, LINUX_IFNAMSIZ) == 0)
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return (-1);
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if (cbs->is_eth && IFP_IS_ETH(ifp) && cbs->unit == cbs->index++)
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return (-1);
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if (cbs->is_lo && IFP_IS_LOOP(ifp))
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return (-1);
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cbs->ifp = NULL;
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return (0);
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}
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/*
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* Translate a Linux interface name to a FreeBSD interface name,
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* and return the associated ifnet structure
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@ -250,46 +280,33 @@ bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
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struct ifnet *
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ifname_linux_to_bsd(struct thread *td, const char *lxname, char *bsdname)
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{
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struct ifnet *ifp;
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int len, unit;
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struct ifname_linux_to_bsd_cb_s cbs = {};
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int len;
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char *ep;
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int index;
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bool is_eth, is_lo;
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cbs.lxname = lxname;
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for (len = 0; len < LINUX_IFNAMSIZ; ++len)
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if (!isalpha(lxname[len]) || lxname[len] == '\0')
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break;
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if (len == 0 || len == LINUX_IFNAMSIZ)
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return (NULL);
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/* Linux loopback interface name is lo (not lo0) */
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is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
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unit = (int)strtoul(lxname + len, &ep, 10);
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cbs.is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
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cbs.unit = (int)strtoul(lxname + len, &ep, 10);
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if ((ep == NULL || ep == lxname + len || ep >= lxname + LINUX_IFNAMSIZ) &&
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is_lo == 0)
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cbs.is_lo == 0)
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return (NULL);
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index = 0;
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is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
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cbs.index = 0;
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cbs.is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
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CURVNET_SET(TD_TO_VNET(td));
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IFNET_RLOCK();
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
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/*
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* Allow Linux programs to use FreeBSD names. Don't presume
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* we never have an interface named "eth", so don't make
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* the test optional based on is_eth.
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*/
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if (strncmp(ifp->if_xname, lxname, LINUX_IFNAMSIZ) == 0)
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break;
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if (is_eth && IFP_IS_ETH(ifp) && unit == index++)
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break;
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if (is_lo && IFP_IS_LOOP(ifp))
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break;
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}
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if_foreach(ifname_linux_to_bsd_cb, &cbs);
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IFNET_RUNLOCK();
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CURVNET_RESTORE();
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if (ifp != NULL && bsdname != NULL)
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strlcpy(bsdname, ifp->if_xname, IFNAMSIZ);
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return (ifp);
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if (cbs.ifp != NULL && bsdname != NULL)
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strlcpy(bsdname, if_name(cbs.ifp), IFNAMSIZ);
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return (cbs.ifp);
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}
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void
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@ -297,7 +314,7 @@ linux_ifflags(struct ifnet *ifp, short *flags)
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{
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unsigned short fl;
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fl = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
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fl = (if_getflags(ifp) | if_getdrvflags(ifp)) & 0xffff;
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*flags = 0;
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if (fl & IFF_UP)
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*flags |= LINUX_IFF_UP;
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@ -321,11 +338,28 @@ linux_ifflags(struct ifnet *ifp, short *flags)
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*flags |= LINUX_IFF_MULTICAST;
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}
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static u_int
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linux_ifhwaddr_cb(void *arg, struct ifaddr *ifa, u_int count)
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{
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struct sockaddr_dl *sdl = (struct sockaddr_dl *)ifa->ifa_addr;
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struct l_sockaddr *lsa = arg;
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if (count > 0)
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return (0);
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if (sdl->sdl_type != IFT_ETHER)
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return (0);
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bzero(lsa, sizeof(*lsa));
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lsa->sa_family = LINUX_ARPHRD_ETHER;
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bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);
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return (1);
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}
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int
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linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
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{
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struct ifaddr *ifa;
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struct sockaddr_dl *sdl;
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if (IFP_IS_LOOP(ifp)) {
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bzero(lsa, sizeof(*lsa));
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@ -336,16 +370,8 @@ linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
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if (!IFP_IS_ETH(ifp))
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return (ENOENT);
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CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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sdl = (struct sockaddr_dl*)ifa->ifa_addr;
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if (sdl != NULL && (sdl->sdl_family == AF_LINK) &&
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(sdl->sdl_type == IFT_ETHER)) {
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bzero(lsa, sizeof(*lsa));
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lsa->sa_family = LINUX_ARPHRD_ETHER;
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bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);
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return (0);
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}
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}
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if (if_foreach_addr_type(ifp, AF_LINK, linux_ifhwaddr_cb, lsa) > 0)
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return (0);
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return (ENOENT);
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}
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@ -732,5 +758,5 @@ bool
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linux_use_real_ifname(const struct ifnet *ifp)
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{
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return (use_real_ifnames || !IFP_IS_ETH(ifp));
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return (use_real_ifnames || !IFP_IS_ETH(__DECONST(if_t, ifp)));
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}
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@ -287,8 +287,8 @@ struct l_statx {
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/*
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* Criteria for interface name translation
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*/
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#define IFP_IS_ETH(ifp) ((ifp)->if_type == IFT_ETHER)
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#define IFP_IS_LOOP(ifp) ((ifp)->if_type == IFT_LOOP)
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#define IFP_IS_ETH(ifp) (if_gettype(ifp) == IFT_ETHER)
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#define IFP_IS_LOOP(ifp) (if_gettype(ifp) == IFT_LOOP)
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struct ifnet;
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@ -2087,46 +2087,138 @@ linux_ioctl_console(struct thread *td, struct linux_ioctl_args *args)
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/*
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* Implement the SIOCGIFNAME ioctl
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*/
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struct linux_ioctl_ifname_cb_s {
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struct l_ifreq ifr;
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int index;
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int ethno;
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};
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static int
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linux_ioctl_ifname_cb(if_t ifp, void *arg)
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{
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struct linux_ioctl_ifname_cb_s *cbs = arg;
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if (cbs->ifr.ifr_ifindex == cbs->index) {
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if (!linux_use_real_ifname(ifp))
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snprintf(cbs->ifr.ifr_name, LINUX_IFNAMSIZ,
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"eth%d", cbs->ethno);
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else
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strlcpy(cbs->ifr.ifr_name, if_name(ifp),
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LINUX_IFNAMSIZ);
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return (-1);
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}
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if (!linux_use_real_ifname(ifp))
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cbs->ethno++;
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cbs->index++;
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return (0);
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}
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static int
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linux_ioctl_ifname(struct thread *td, struct l_ifreq *uifr)
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{
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struct linux_ioctl_ifname_cb_s cbs;
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struct l_ifreq ifr;
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struct ifnet *ifp;
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int error, ethno, index;
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int error;
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error = copyin(uifr, &ifr, sizeof(ifr));
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error = copyin(uifr, &cbs.ifr, sizeof(cbs.ifr));
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if (error != 0)
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return (error);
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CURVNET_SET(TD_TO_VNET(curthread));
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IFNET_RLOCK();
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index = 1; /* ifr.ifr_ifindex starts from 1 */
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ethno = 0;
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error = ENODEV;
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
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if (ifr.ifr_ifindex == index) {
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if (!linux_use_real_ifname(ifp))
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snprintf(ifr.ifr_name, LINUX_IFNAMSIZ,
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"eth%d", ethno);
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else
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strlcpy(ifr.ifr_name, ifp->if_xname,
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LINUX_IFNAMSIZ);
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error = 0;
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break;
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}
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if (!linux_use_real_ifname(ifp))
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ethno++;
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index++;
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}
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IFNET_RUNLOCK();
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cbs.index = 1; /* ifr.ifr_ifindex starts from 1 */
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cbs.ethno = 0;
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error = if_foreach(linux_ioctl_ifname_cb, &cbs);
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if (error == 0)
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error = ENODEV;
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IFNET_RUNLOCK();
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if (error == -1)
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error = copyout(&ifr, uifr, sizeof(ifr));
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CURVNET_RESTORE();
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return (error);
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}
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static u_int
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linux_ifconf_ifaddr_cb(void *arg, struct ifaddr *ifa, u_int count)
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{
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#ifdef COMPAT_LINUX32
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struct l_ifconf *ifc;
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#else
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struct ifconf *ifc;
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#endif
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ifc = arg;
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ifc->ifc_len += sizeof(struct l_ifreq);
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return (1);
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}
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static int
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linux_ifconf_ifnet_cb(if_t ifp, void *arg)
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{
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if_foreach_addr_type(ifp, AF_INET, linux_ifconf_ifaddr_cb, arg);
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return (0);
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}
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struct linux_ifconfig_ifaddr_cb2_s {
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struct l_ifreq ifr;
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struct sbuf *sb;
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size_t max_len;
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size_t valid_len;
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int ethno;
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};
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static u_int
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linux_ifconf_ifaddr_cb2(void *arg, struct ifaddr *ifa, u_int len)
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{
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struct linux_ifconfig_ifaddr_cb2_s *cbs = arg;
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struct sockaddr *sa = ifa->ifa_addr;
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cbs->ifr.ifr_addr.sa_family = LINUX_AF_INET;
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memcpy(cbs->ifr.ifr_addr.sa_data, sa->sa_data,
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sizeof(cbs->ifr.ifr_addr.sa_data));
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sbuf_bcat(cbs->sb, &cbs->ifr, sizeof(cbs->ifr));
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cbs->max_len += sizeof(cbs->ifr);
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if (sbuf_error(cbs->sb) == 0)
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cbs->valid_len = sbuf_len(cbs->sb);
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return (len);
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}
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static int
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linux_ifconf_ifnet_cb2(if_t ifp, void *arg)
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{
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struct linux_ifconfig_ifaddr_cb2_s *cbs = arg;
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int addrs = 0;
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bzero(&cbs->ifr, sizeof(cbs->ifr));
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if (IFP_IS_ETH(ifp))
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snprintf(cbs->ifr.ifr_name, LINUX_IFNAMSIZ, "eth%d",
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cbs->ethno++);
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else
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strlcpy(cbs->ifr.ifr_name, if_name(ifp), LINUX_IFNAMSIZ);
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/* Walk the address list */
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addrs = if_foreach_addr_type(ifp, AF_INET,
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linux_ifconf_ifaddr_cb2, cbs);
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if (sbuf_error(cbs->sb) == 0)
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cbs->valid_len = sbuf_len(cbs->sb);
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if (addrs == 0) {
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bzero((caddr_t)&cbs->ifr.ifr_addr, sizeof(cbs->ifr.ifr_addr));
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sbuf_bcat(cbs->sb, &cbs->ifr, sizeof(cbs->ifr));
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cbs->max_len += sizeof(cbs->ifr);
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if (sbuf_error(cbs->sb) == 0)
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cbs->valid_len = sbuf_len(cbs->sb);
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}
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return (0);
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}
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/*
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* Implement the SIOCGIFCONF ioctl
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*/
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@ -2139,30 +2231,22 @@ linux_ifconf(struct thread *td, struct ifconf *uifc)
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#else
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struct ifconf ifc;
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#endif
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struct l_ifreq ifr;
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struct ifnet *ifp;
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struct ifaddr *ifa;
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struct linux_ifconfig_ifaddr_cb2_s cbs;
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struct sbuf *sb;
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int error, ethno, full = 0, valid_len, max_len;
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int error, full = 0;
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error = copyin(uifc, &ifc, sizeof(ifc));
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if (error != 0)
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return (error);
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max_len = maxphys - 1;
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cbs.max_len = maxphys - 1;
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CURVNET_SET(TD_TO_VNET(td));
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/* handle the 'request buffer size' case */
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if ((l_uintptr_t)ifc.ifc_buf == PTROUT(NULL)) {
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ifc.ifc_len = 0;
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IFNET_RLOCK();
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
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CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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struct sockaddr *sa = ifa->ifa_addr;
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if (sa->sa_family == AF_INET)
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ifc.ifc_len += sizeof(ifr);
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}
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}
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if_foreach(linux_ifconf_ifnet_cb, &ifc);
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IFNET_RUNLOCK();
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error = copyout(&ifc, uifc, sizeof(ifc));
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CURVNET_RESTORE();
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@ -2175,61 +2259,28 @@ linux_ifconf(struct thread *td, struct ifconf *uifc)
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}
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again:
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cbs.ethno = 0;
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/* Keep track of eth interfaces */
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ethno = 0;
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if (ifc.ifc_len <= max_len) {
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max_len = ifc.ifc_len;
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if (ifc.ifc_len <= cbs.max_len) {
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cbs.max_len = ifc.ifc_len;
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full = 1;
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}
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sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
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max_len = 0;
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valid_len = 0;
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sb = sbuf_new(NULL, NULL, cbs.max_len + 1, SBUF_FIXEDLEN);
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cbs.max_len = 0;
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cbs.valid_len = 0;
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cbs.sb = sb;
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/* Return all AF_INET addresses of all interfaces */
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IFNET_RLOCK();
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CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
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int addrs = 0;
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bzero(&ifr, sizeof(ifr));
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if (IFP_IS_ETH(ifp))
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snprintf(ifr.ifr_name, LINUX_IFNAMSIZ, "eth%d",
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ethno++);
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else
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strlcpy(ifr.ifr_name, ifp->if_xname, LINUX_IFNAMSIZ);
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/* Walk the address list */
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CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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struct sockaddr *sa = ifa->ifa_addr;
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if (sa->sa_family == AF_INET) {
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ifr.ifr_addr.sa_family = LINUX_AF_INET;
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memcpy(ifr.ifr_addr.sa_data, sa->sa_data,
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sizeof(ifr.ifr_addr.sa_data));
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sbuf_bcat(sb, &ifr, sizeof(ifr));
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max_len += sizeof(ifr);
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addrs++;
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}
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if (sbuf_error(sb) == 0)
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valid_len = sbuf_len(sb);
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}
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if (addrs == 0) {
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bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
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sbuf_bcat(sb, &ifr, sizeof(ifr));
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max_len += sizeof(ifr);
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if (sbuf_error(sb) == 0)
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valid_len = sbuf_len(sb);
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}
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}
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if_foreach(linux_ifconf_ifnet_cb2, &cbs);
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IFNET_RUNLOCK();
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if (valid_len != max_len && !full) {
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if (cbs.valid_len != cbs.max_len && !full) {
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sbuf_delete(sb);
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goto again;
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}
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ifc.ifc_len = valid_len;
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ifc.ifc_len = cbs.valid_len;
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sbuf_finish(sb);
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error = copyout(sbuf_data(sb), PTRIN(ifc.ifc_buf), ifc.ifc_len);
|
||||
if (error == 0)
|
||||
|
||||
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Reference in New Issue
Block a user