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-rw-r--r--net/bridge/br_fdb.c246
1 files changed, 122 insertions, 124 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index a6a68e18c70a..bfb28a24ea81 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -34,8 +34,6 @@ static const struct rhashtable_params br_fdb_rht_params = {
static struct kmem_cache *br_fdb_cache __read_mostly;
static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr, u16 vid);
-static void fdb_notify(struct net_bridge *br,
- const struct net_bridge_fdb_entry *, int, bool);
int __init br_fdb_init(void)
{
@@ -87,6 +85,128 @@ static void fdb_rcu_free(struct rcu_head *head)
kmem_cache_free(br_fdb_cache, ent);
}
+static int fdb_to_nud(const struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb)
+{
+ if (test_bit(BR_FDB_LOCAL, &fdb->flags))
+ return NUD_PERMANENT;
+ else if (test_bit(BR_FDB_STATIC, &fdb->flags))
+ return NUD_NOARP;
+ else if (has_expired(br, fdb))
+ return NUD_STALE;
+ else
+ return NUD_REACHABLE;
+}
+
+static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb,
+ u32 portid, u32 seq, int type, unsigned int flags)
+{
+ const struct net_bridge_port *dst = READ_ONCE(fdb->dst);
+ unsigned long now = jiffies;
+ struct nda_cacheinfo ci;
+ struct nlmsghdr *nlh;
+ struct ndmsg *ndm;
+
+ nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ndm = nlmsg_data(nlh);
+ ndm->ndm_family = AF_BRIDGE;
+ ndm->ndm_pad1 = 0;
+ ndm->ndm_pad2 = 0;
+ ndm->ndm_flags = 0;
+ ndm->ndm_type = 0;
+ ndm->ndm_ifindex = dst ? dst->dev->ifindex : br->dev->ifindex;
+ ndm->ndm_state = fdb_to_nud(br, fdb);
+
+ if (test_bit(BR_FDB_OFFLOADED, &fdb->flags))
+ ndm->ndm_flags |= NTF_OFFLOADED;
+ if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags))
+ ndm->ndm_flags |= NTF_EXT_LEARNED;
+ if (test_bit(BR_FDB_STICKY, &fdb->flags))
+ ndm->ndm_flags |= NTF_STICKY;
+
+ if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.addr))
+ goto nla_put_failure;
+ if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
+ goto nla_put_failure;
+ ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
+ ci.ndm_confirmed = 0;
+ ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
+ ci.ndm_refcnt = 0;
+ if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
+ goto nla_put_failure;
+
+ if (fdb->key.vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16),
+ &fdb->key.vlan_id))
+ goto nla_put_failure;
+
+ if (test_bit(BR_FDB_NOTIFY, &fdb->flags)) {
+ struct nlattr *nest = nla_nest_start(skb, NDA_FDB_EXT_ATTRS);
+ u8 notify_bits = FDB_NOTIFY_BIT;
+
+ if (!nest)
+ goto nla_put_failure;
+ if (test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags))
+ notify_bits |= FDB_NOTIFY_INACTIVE_BIT;
+
+ if (nla_put_u8(skb, NFEA_ACTIVITY_NOTIFY, notify_bits)) {
+ nla_nest_cancel(skb, nest);
+ goto nla_put_failure;
+ }
+
+ nla_nest_end(skb, nest);
+ }
+
+ nlmsg_end(skb, nlh);
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static inline size_t fdb_nlmsg_size(void)
+{
+ return NLMSG_ALIGN(sizeof(struct ndmsg))
+ + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
+ + nla_total_size(sizeof(u32)) /* NDA_MASTER */
+ + nla_total_size(sizeof(u16)) /* NDA_VLAN */
+ + nla_total_size(sizeof(struct nda_cacheinfo))
+ + nla_total_size(0) /* NDA_FDB_EXT_ATTRS */
+ + nla_total_size(sizeof(u8)); /* NFEA_ACTIVITY_NOTIFY */
+}
+
+static void fdb_notify(struct net_bridge *br,
+ const struct net_bridge_fdb_entry *fdb, int type,
+ bool swdev_notify)
+{
+ struct net *net = dev_net(br->dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ if (swdev_notify)
+ br_switchdev_fdb_notify(br, fdb, type);
+
+ skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
+ if (skb == NULL)
+ goto errout;
+
+ err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(skb);
+ goto errout;
+ }
+ rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
+ return;
+errout:
+ rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+}
+
static struct net_bridge_fdb_entry *fdb_find_rcu(struct rhashtable *tbl,
const unsigned char *addr,
__u16 vid)
@@ -638,100 +758,6 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
}
}
-static int fdb_to_nud(const struct net_bridge *br,
- const struct net_bridge_fdb_entry *fdb)
-{
- if (test_bit(BR_FDB_LOCAL, &fdb->flags))
- return NUD_PERMANENT;
- else if (test_bit(BR_FDB_STATIC, &fdb->flags))
- return NUD_NOARP;
- else if (has_expired(br, fdb))
- return NUD_STALE;
- else
- return NUD_REACHABLE;
-}
-
-static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
- const struct net_bridge_fdb_entry *fdb,
- u32 portid, u32 seq, int type, unsigned int flags)
-{
- const struct net_bridge_port *dst = READ_ONCE(fdb->dst);
- unsigned long now = jiffies;
- struct nda_cacheinfo ci;
- struct nlmsghdr *nlh;
- struct ndmsg *ndm;
-
- nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
- if (nlh == NULL)
- return -EMSGSIZE;
-
- ndm = nlmsg_data(nlh);
- ndm->ndm_family = AF_BRIDGE;
- ndm->ndm_pad1 = 0;
- ndm->ndm_pad2 = 0;
- ndm->ndm_flags = 0;
- ndm->ndm_type = 0;
- ndm->ndm_ifindex = dst ? dst->dev->ifindex : br->dev->ifindex;
- ndm->ndm_state = fdb_to_nud(br, fdb);
-
- if (test_bit(BR_FDB_OFFLOADED, &fdb->flags))
- ndm->ndm_flags |= NTF_OFFLOADED;
- if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags))
- ndm->ndm_flags |= NTF_EXT_LEARNED;
- if (test_bit(BR_FDB_STICKY, &fdb->flags))
- ndm->ndm_flags |= NTF_STICKY;
-
- if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.addr))
- goto nla_put_failure;
- if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
- goto nla_put_failure;
- ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
- ci.ndm_confirmed = 0;
- ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
- ci.ndm_refcnt = 0;
- if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
- goto nla_put_failure;
-
- if (fdb->key.vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16),
- &fdb->key.vlan_id))
- goto nla_put_failure;
-
- if (test_bit(BR_FDB_NOTIFY, &fdb->flags)) {
- struct nlattr *nest = nla_nest_start(skb, NDA_FDB_EXT_ATTRS);
- u8 notify_bits = FDB_NOTIFY_BIT;
-
- if (!nest)
- goto nla_put_failure;
- if (test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags))
- notify_bits |= FDB_NOTIFY_INACTIVE_BIT;
-
- if (nla_put_u8(skb, NFEA_ACTIVITY_NOTIFY, notify_bits)) {
- nla_nest_cancel(skb, nest);
- goto nla_put_failure;
- }
-
- nla_nest_end(skb, nest);
- }
-
- nlmsg_end(skb, nlh);
- return 0;
-
-nla_put_failure:
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
-}
-
-static inline size_t fdb_nlmsg_size(void)
-{
- return NLMSG_ALIGN(sizeof(struct ndmsg))
- + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
- + nla_total_size(sizeof(u32)) /* NDA_MASTER */
- + nla_total_size(sizeof(u16)) /* NDA_VLAN */
- + nla_total_size(sizeof(struct nda_cacheinfo))
- + nla_total_size(0) /* NDA_FDB_EXT_ATTRS */
- + nla_total_size(sizeof(u8)); /* NFEA_ACTIVITY_NOTIFY */
-}
-
static int br_fdb_replay_one(struct net_bridge *br, struct notifier_block *nb,
const struct net_bridge_fdb_entry *fdb,
unsigned long action, const void *ctx)
@@ -786,34 +812,6 @@ int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding,
return err;
}
-static void fdb_notify(struct net_bridge *br,
- const struct net_bridge_fdb_entry *fdb, int type,
- bool swdev_notify)
-{
- struct net *net = dev_net(br->dev);
- struct sk_buff *skb;
- int err = -ENOBUFS;
-
- if (swdev_notify)
- br_switchdev_fdb_notify(br, fdb, type);
-
- skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
- if (skb == NULL)
- goto errout;
-
- err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
- if (err < 0) {
- /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
- WARN_ON(err == -EMSGSIZE);
- kfree_skb(skb);
- goto errout;
- }
- rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
- return;
-errout:
- rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
-}
-
/* Dump information about entries, in response to GETNEIGH */
int br_fdb_dump(struct sk_buff *skb,
struct netlink_callback *cb,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 13:50:25 +0000