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[Qemu-devel] [PATCH RFC v2 3/5] net/filter: Introduce a helper to add a
From: |
zhanghailiang |
Subject: |
[Qemu-devel] [PATCH RFC v2 3/5] net/filter: Introduce a helper to add a filter to the netdev |
Date: |
Wed, 27 Jan 2016 16:29:38 +0800 |
We add a new helper function netdev_add_filter(), this function
can help adding a filter object to a netdev.
Besides, we add a is_default member for struct NetFilterState
to indicate whether the filter is default or not.
Signed-off-by: zhanghailiang <address@hidden>
---
v2:
-Re-implement netdev_add_filter() by re-using object_create()
(Jason's suggestion)
---
include/net/filter.h | 7 +++++
net/filter.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 87 insertions(+)
diff --git a/include/net/filter.h b/include/net/filter.h
index af3c53c..ee1c024 100644
--- a/include/net/filter.h
+++ b/include/net/filter.h
@@ -55,6 +55,7 @@ struct NetFilterState {
char *netdev_id;
NetClientState *netdev;
NetFilterDirection direction;
+ bool is_default;
bool enabled;
QTAILQ_ENTRY(NetFilterState) next;
};
@@ -74,4 +75,10 @@ ssize_t qemu_netfilter_pass_to_next(NetClientState *sender,
int iovcnt,
void *opaque);
+void netdev_add_filter(const char *netdev_id,
+ const char *filter_type,
+ const char *id,
+ bool is_default,
+ Error **errp);
+
#endif /* QEMU_NET_FILTER_H */
diff --git a/net/filter.c b/net/filter.c
index d08a2be..dc7aa9b 100644
--- a/net/filter.c
+++ b/net/filter.c
@@ -214,6 +214,86 @@ static void netfilter_complete(UserCreatable *uc, Error
**errp)
QTAILQ_INSERT_TAIL(&nf->netdev->filters, nf, next);
}
+QemuOptsList qemu_filter_opts = {
+ .name = "default-filter",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_filter_opts.head),
+ .desc = {
+ {
+ .name = "qom-type",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "id",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "netdev",
+ .type = QEMU_OPT_STRING,
+ },{
+ .name = "status",
+ .type = QEMU_OPT_STRING,
+ },
+ { /* end of list */ }
+ },
+};
+
+static void filter_set_default_flag(const char *id,
+ bool is_default,
+ Error **errp)
+{
+ Object *obj, *container;
+ NetFilterState *nf;
+
+ container = object_get_objects_root();
+ obj = object_resolve_path_component(container, id);
+ if (!obj) {
+ error_setg(errp, "object id not found");
+ return;
+ }
+ nf = NETFILTER(obj);
+ nf->is_default = is_default;
+}
+
+void netdev_add_filter(const char *netdev_id,
+ const char *filter_type,
+ const char *id,
+ bool is_default,
+ Error **errp)
+{
+ NetClientState *nc = qemu_find_netdev(netdev_id);
+ char *optarg;
+ QemuOpts *opts = NULL;
+ Error *err = NULL;
+
+ /* FIXME: Not support multiple queues */
+ if (!nc || nc->queue_index > 1) {
+ return;
+ }
+ /* Not support vhost-net */
+ if (get_vhost_net(nc)) {
+ return;
+ }
+
+ optarg = g_strdup_printf("qom-type=%s,id=%s,netdev=%s,status=%s",
+ filter_type, id, netdev_id, is_default ? "disable" : "enable");
+ opts = qemu_opts_parse_noisily(&qemu_filter_opts,
+ optarg, false);
+ if (!opts) {
+ error_report("Failed to parse param '%s'", optarg);
+ exit(1);
+ }
+ g_free(optarg);
+ if (object_create(NULL, opts, &err) < 0) {
+ error_report("Failed to create object");
+ goto out_clean;
+ }
+ filter_set_default_flag(id, is_default, &err);
+
+out_clean:
+ qemu_opts_del(opts);
+ if (err) {
+ error_propagate(errp, err);
+ }
+}
+
static void netfilter_finalize(Object *obj)
{
NetFilterState *nf = NETFILTER(obj);
--
1.8.3.1