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Diffstat (limited to 'net/mptcp/pm_userspace.c')
-rw-r--r--net/mptcp/pm_userspace.c221
1 files changed, 193 insertions, 28 deletions
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index bc97cc30f0..9f5d422d5e 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -106,19 +106,26 @@ static int mptcp_userspace_pm_delete_local_addr(struct mptcp_sock *msk,
return -EINVAL;
}
+static struct mptcp_pm_addr_entry *
+mptcp_userspace_pm_lookup_addr_by_id(struct mptcp_sock *msk, unsigned int id)
+{
+ struct mptcp_pm_addr_entry *entry;
+
+ list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
+ if (entry->addr.id == id)
+ return entry;
+ }
+ return NULL;
+}
+
int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk,
unsigned int id,
u8 *flags, int *ifindex)
{
- struct mptcp_pm_addr_entry *entry, *match = NULL;
+ struct mptcp_pm_addr_entry *match;
spin_lock_bh(&msk->pm.lock);
- list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
- if (id == entry->addr.id) {
- match = entry;
- break;
- }
- }
+ match = mptcp_userspace_pm_lookup_addr_by_id(msk, id);
spin_unlock_bh(&msk->pm.lock);
if (match) {
*flags = match->flags;
@@ -261,7 +268,7 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID];
- struct mptcp_pm_addr_entry *match = NULL;
+ struct mptcp_pm_addr_entry *match;
struct mptcp_pm_addr_entry *entry;
struct mptcp_sock *msk;
LIST_HEAD(free_list);
@@ -298,13 +305,7 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
lock_sock(sk);
- list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
- if (entry->addr.id == id_val) {
- match = entry;
- break;
- }
- }
-
+ match = mptcp_userspace_pm_lookup_addr_by_id(msk, id_val);
if (!match) {
GENL_SET_ERR_MSG(info, "address with specified id not found");
release_sock(sk);
@@ -334,7 +335,6 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
struct mptcp_pm_addr_entry local = { 0 };
struct mptcp_addr_info addr_r;
- struct mptcp_addr_info addr_l;
struct mptcp_sock *msk;
int err = -EINVAL;
struct sock *sk;
@@ -360,25 +360,31 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
goto create_err;
}
- err = mptcp_pm_parse_addr(laddr, info, &addr_l);
+ err = mptcp_pm_parse_entry(laddr, info, true, &local);
if (err < 0) {
NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
goto create_err;
}
+ if (local.flags & MPTCP_PM_ADDR_FLAG_SIGNAL) {
+ GENL_SET_ERR_MSG(info, "invalid addr flags");
+ err = -EINVAL;
+ goto create_err;
+ }
+ local.flags |= MPTCP_PM_ADDR_FLAG_SUBFLOW;
+
err = mptcp_pm_parse_addr(raddr, info, &addr_r);
if (err < 0) {
NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
goto create_err;
}
- if (!mptcp_pm_addr_families_match(sk, &addr_l, &addr_r)) {
+ if (!mptcp_pm_addr_families_match(sk, &local.addr, &addr_r)) {
GENL_SET_ERR_MSG(info, "families mismatch");
err = -EINVAL;
goto create_err;
}
- local.addr = addr_l;
err = mptcp_userspace_pm_append_new_local_addr(msk, &local, false);
if (err < 0) {
GENL_SET_ERR_MSG(info, "did not match address and id");
@@ -387,7 +393,7 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
lock_sock(sk);
- err = __mptcp_subflow_connect(sk, &addr_l, &addr_r);
+ err = __mptcp_subflow_connect(sk, &local.addr, &addr_r);
release_sock(sk);
@@ -540,35 +546,194 @@ destroy_err:
return err;
}
-int mptcp_userspace_pm_set_flags(struct net *net, struct nlattr *token,
- struct mptcp_pm_addr_entry *loc,
- struct mptcp_pm_addr_entry *rem, u8 bkup)
+int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info)
{
+ struct mptcp_pm_addr_entry loc = { .addr = { .family = AF_UNSPEC }, };
+ struct mptcp_pm_addr_entry rem = { .addr = { .family = AF_UNSPEC }, };
+ struct nlattr *attr_rem = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
+ struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
+ struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR];
+ struct net *net = sock_net(skb->sk);
struct mptcp_sock *msk;
int ret = -EINVAL;
struct sock *sk;
u32 token_val;
+ u8 bkup = 0;
token_val = nla_get_u32(token);
msk = mptcp_token_get_sock(net, token_val);
- if (!msk)
+ if (!msk) {
+ NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
return ret;
+ }
sk = (struct sock *)msk;
- if (!mptcp_pm_is_userspace(msk))
+ if (!mptcp_pm_is_userspace(msk)) {
+ GENL_SET_ERR_MSG(info, "userspace PM not selected");
goto set_flags_err;
+ }
+
+ ret = mptcp_pm_parse_entry(attr, info, false, &loc);
+ if (ret < 0)
+ goto set_flags_err;
+
+ if (attr_rem) {
+ ret = mptcp_pm_parse_entry(attr_rem, info, false, &rem);
+ if (ret < 0)
+ goto set_flags_err;
+ }
- if (loc->addr.family == AF_UNSPEC ||
- rem->addr.family == AF_UNSPEC)
+ if (loc.addr.family == AF_UNSPEC ||
+ rem.addr.family == AF_UNSPEC) {
+ GENL_SET_ERR_MSG(info, "invalid address families");
+ ret = -EINVAL;
goto set_flags_err;
+ }
+
+ if (loc.flags & MPTCP_PM_ADDR_FLAG_BACKUP)
+ bkup = 1;
lock_sock(sk);
- ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup);
+ ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc.addr, &rem.addr, bkup);
release_sock(sk);
set_flags_err:
sock_put(sk);
return ret;
}
+
+int mptcp_userspace_pm_dump_addr(struct sk_buff *msg,
+ struct netlink_callback *cb)
+{
+ struct id_bitmap {
+ DECLARE_BITMAP(map, MPTCP_PM_MAX_ADDR_ID + 1);
+ } *bitmap;
+ const struct genl_info *info = genl_info_dump(cb);
+ struct net *net = sock_net(msg->sk);
+ struct mptcp_pm_addr_entry *entry;
+ struct mptcp_sock *msk;
+ struct nlattr *token;
+ int ret = -EINVAL;
+ struct sock *sk;
+ void *hdr;
+
+ bitmap = (struct id_bitmap *)cb->ctx;
+ token = info->attrs[MPTCP_PM_ATTR_TOKEN];
+
+ msk = mptcp_token_get_sock(net, nla_get_u32(token));
+ if (!msk) {
+ NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
+ return ret;
+ }
+
+ sk = (struct sock *)msk;
+
+ if (!mptcp_pm_is_userspace(msk)) {
+ GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
+ goto out;
+ }
+
+ lock_sock(sk);
+ spin_lock_bh(&msk->pm.lock);
+ list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
+ if (test_bit(entry->addr.id, bitmap->map))
+ continue;
+
+ hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, &mptcp_genl_family,
+ NLM_F_MULTI, MPTCP_PM_CMD_GET_ADDR);
+ if (!hdr)
+ break;
+
+ if (mptcp_nl_fill_addr(msg, entry) < 0) {
+ genlmsg_cancel(msg, hdr);
+ break;
+ }
+
+ __set_bit(entry->addr.id, bitmap->map);
+ genlmsg_end(msg, hdr);
+ }
+ spin_unlock_bh(&msk->pm.lock);
+ release_sock(sk);
+ ret = msg->len;
+
+out:
+ sock_put(sk);
+ return ret;
+}
+
+int mptcp_userspace_pm_get_addr(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct nlattr *attr = info->attrs[MPTCP_PM_ENDPOINT_ADDR];
+ struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
+ struct mptcp_pm_addr_entry addr, *entry;
+ struct net *net = sock_net(skb->sk);
+ struct mptcp_sock *msk;
+ struct sk_buff *msg;
+ int ret = -EINVAL;
+ struct sock *sk;
+ void *reply;
+
+ msk = mptcp_token_get_sock(net, nla_get_u32(token));
+ if (!msk) {
+ NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
+ return ret;
+ }
+
+ sk = (struct sock *)msk;
+
+ if (!mptcp_pm_is_userspace(msk)) {
+ GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
+ goto out;
+ }
+
+ ret = mptcp_pm_parse_entry(attr, info, false, &addr);
+ if (ret < 0)
+ goto out;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ reply = genlmsg_put_reply(msg, info, &mptcp_genl_family, 0,
+ info->genlhdr->cmd);
+ if (!reply) {
+ GENL_SET_ERR_MSG(info, "not enough space in Netlink message");
+ ret = -EMSGSIZE;
+ goto fail;
+ }
+
+ lock_sock(sk);
+ spin_lock_bh(&msk->pm.lock);
+ entry = mptcp_userspace_pm_lookup_addr_by_id(msk, addr.addr.id);
+ if (!entry) {
+ GENL_SET_ERR_MSG(info, "address not found");
+ ret = -EINVAL;
+ goto unlock_fail;
+ }
+
+ ret = mptcp_nl_fill_addr(msg, entry);
+ if (ret)
+ goto unlock_fail;
+
+ genlmsg_end(msg, reply);
+ ret = genlmsg_reply(msg, info);
+ spin_unlock_bh(&msk->pm.lock);
+ release_sock(sk);
+ sock_put(sk);
+ return ret;
+
+unlock_fail:
+ spin_unlock_bh(&msk->pm.lock);
+ release_sock(sk);
+fail:
+ nlmsg_free(msg);
+out:
+ sock_put(sk);
+ return ret;
+}