diff options
Diffstat (limited to 'qemu/net/filter.c')
| -rw-r--r-- | qemu/net/filter.c | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/qemu/net/filter.c b/qemu/net/filter.c deleted file mode 100644 index 8ac79f3b7..000000000 --- a/qemu/net/filter.c +++ /dev/null @@ -1,275 +0,0 @@ -/* - * Copyright (c) 2015 FUJITSU LIMITED - * Author: Yang Hongyang <yanghy@cn.fujitsu.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or - * later. See the COPYING file in the top-level directory. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "qemu-common.h" -#include "qapi/qmp/qerror.h" -#include "qemu/error-report.h" - -#include "net/filter.h" -#include "net/net.h" -#include "net/vhost_net.h" -#include "qom/object_interfaces.h" -#include "qemu/iov.h" - -static inline bool qemu_can_skip_netfilter(NetFilterState *nf) -{ - return !nf->on; -} - -ssize_t qemu_netfilter_receive(NetFilterState *nf, - NetFilterDirection direction, - NetClientState *sender, - unsigned flags, - const struct iovec *iov, - int iovcnt, - NetPacketSent *sent_cb) -{ - if (qemu_can_skip_netfilter(nf)) { - return 0; - } - if (nf->direction == direction || - nf->direction == NET_FILTER_DIRECTION_ALL) { - return NETFILTER_GET_CLASS(OBJECT(nf))->receive_iov( - nf, sender, flags, iov, iovcnt, sent_cb); - } - - return 0; -} - -static NetFilterState *netfilter_next(NetFilterState *nf, - NetFilterDirection dir) -{ - NetFilterState *next; - - if (dir == NET_FILTER_DIRECTION_TX) { - /* forward walk through filters */ - next = QTAILQ_NEXT(nf, next); - } else { - /* reverse order */ - next = QTAILQ_PREV(nf, NetFilterHead, next); - } - - return next; -} - -ssize_t qemu_netfilter_pass_to_next(NetClientState *sender, - unsigned flags, - const struct iovec *iov, - int iovcnt, - void *opaque) -{ - int ret = 0; - int direction; - NetFilterState *nf = opaque; - NetFilterState *next = NULL; - - if (!sender || !sender->peer) { - /* no receiver, or sender been deleted, no need to pass it further */ - goto out; - } - - if (nf->direction == NET_FILTER_DIRECTION_ALL) { - if (sender == nf->netdev) { - /* This packet is sent by netdev itself */ - direction = NET_FILTER_DIRECTION_TX; - } else { - direction = NET_FILTER_DIRECTION_RX; - } - } else { - direction = nf->direction; - } - - next = netfilter_next(nf, direction); - while (next) { - /* - * if qemu_netfilter_pass_to_next been called, means that - * the packet has been hold by filter and has already retured size - * to the sender, so sent_cb shouldn't be called later, just - * pass NULL to next. - */ - ret = qemu_netfilter_receive(next, direction, sender, flags, iov, - iovcnt, NULL); - if (ret) { - return ret; - } - next = netfilter_next(next, direction); - } - - /* - * We have gone through all filters, pass it to receiver. - * Do the valid check again incase sender or receiver been - * deleted while we go through filters. - */ - if (sender && sender->peer) { - qemu_net_queue_send_iov(sender->peer->incoming_queue, - sender, flags, iov, iovcnt, NULL); - } - -out: - /* no receiver, or sender been deleted */ - return iov_size(iov, iovcnt); -} - -static char *netfilter_get_netdev_id(Object *obj, Error **errp) -{ - NetFilterState *nf = NETFILTER(obj); - - return g_strdup(nf->netdev_id); -} - -static void netfilter_set_netdev_id(Object *obj, const char *str, Error **errp) -{ - NetFilterState *nf = NETFILTER(obj); - - nf->netdev_id = g_strdup(str); -} - -static int netfilter_get_direction(Object *obj, Error **errp G_GNUC_UNUSED) -{ - NetFilterState *nf = NETFILTER(obj); - return nf->direction; -} - -static void netfilter_set_direction(Object *obj, int direction, Error **errp) -{ - NetFilterState *nf = NETFILTER(obj); - nf->direction = direction; -} - -static char *netfilter_get_status(Object *obj, Error **errp) -{ - NetFilterState *nf = NETFILTER(obj); - - return nf->on ? g_strdup("on") : g_strdup("off"); -} - -static void netfilter_set_status(Object *obj, const char *str, Error **errp) -{ - NetFilterState *nf = NETFILTER(obj); - NetFilterClass *nfc = NETFILTER_GET_CLASS(obj); - - if (strcmp(str, "on") && strcmp(str, "off")) { - error_setg(errp, "Invalid value for netfilter status, " - "should be 'on' or 'off'"); - return; - } - if (nf->on == !strcmp(str, "on")) { - return; - } - nf->on = !nf->on; - if (nf->netdev && nfc->status_changed) { - nfc->status_changed(nf, errp); - } -} - -static void netfilter_init(Object *obj) -{ - NetFilterState *nf = NETFILTER(obj); - - nf->on = true; - - object_property_add_str(obj, "netdev", - netfilter_get_netdev_id, netfilter_set_netdev_id, - NULL); - object_property_add_enum(obj, "queue", "NetFilterDirection", - NetFilterDirection_lookup, - netfilter_get_direction, netfilter_set_direction, - NULL); - object_property_add_str(obj, "status", - netfilter_get_status, netfilter_set_status, - NULL); -} - -static void netfilter_complete(UserCreatable *uc, Error **errp) -{ - NetFilterState *nf = NETFILTER(uc); - NetClientState *ncs[MAX_QUEUE_NUM]; - NetFilterClass *nfc = NETFILTER_GET_CLASS(uc); - int queues; - Error *local_err = NULL; - - if (!nf->netdev_id) { - error_setg(errp, "Parameter 'netdev' is required"); - return; - } - - queues = qemu_find_net_clients_except(nf->netdev_id, ncs, - NET_CLIENT_OPTIONS_KIND_NIC, - MAX_QUEUE_NUM); - if (queues < 1) { - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "netdev", - "a network backend id"); - return; - } else if (queues > 1) { - error_setg(errp, "multiqueue is not supported"); - return; - } - - if (get_vhost_net(ncs[0])) { - error_setg(errp, "Vhost is not supported"); - return; - } - - nf->netdev = ncs[0]; - - if (nfc->setup) { - nfc->setup(nf, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - } - QTAILQ_INSERT_TAIL(&nf->netdev->filters, nf, next); -} - -static void netfilter_finalize(Object *obj) -{ - NetFilterState *nf = NETFILTER(obj); - NetFilterClass *nfc = NETFILTER_GET_CLASS(obj); - - if (nfc->cleanup) { - nfc->cleanup(nf); - } - - if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters) && - nf->next.tqe_prev) { - QTAILQ_REMOVE(&nf->netdev->filters, nf, next); - } - g_free(nf->netdev_id); -} - -static void netfilter_class_init(ObjectClass *oc, void *data) -{ - UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); - - ucc->complete = netfilter_complete; -} - -static const TypeInfo netfilter_info = { - .name = TYPE_NETFILTER, - .parent = TYPE_OBJECT, - .abstract = true, - .class_size = sizeof(NetFilterClass), - .class_init = netfilter_class_init, - .instance_size = sizeof(NetFilterState), - .instance_init = netfilter_init, - .instance_finalize = netfilter_finalize, - .interfaces = (InterfaceInfo[]) { - { TYPE_USER_CREATABLE }, - { } - } -}; - -static void register_types(void) -{ - type_register_static(&netfilter_info); -} - -type_init(register_types); |