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Merge branch 'mptcp-fix-subflow-s-local_id-remote_id-issues' 

Geliang Tang says:

====================
mptcp: fix subflow's local_id/remote_id issues

v2:
 - add Fixes tags;
 - simply with 'return addresses_equal';
 - use 'reversed Xmas tree' way.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2020-09-10 12:29:15 -07:00
parent a4b5cc9e10 2ff0e566fa
commit d697f42a9f
2 changed files with 20 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
net/mptcp/pm_netlink.c
View File

@ -66,6 +66,16 @@ static bool addresses_equal(const struct mptcp_addr_info *a,
return a->port == b->port;
}
static bool address_zero(const struct mptcp_addr_info *addr)
{
struct mptcp_addr_info zero;
memset(&zero, 0, sizeof(zero));
zero.family = addr->family;
return addresses_equal(addr, &zero, false);
}
static void local_address(const struct sock_common *skc,
struct mptcp_addr_info *addr)
{
@ -171,9 +181,9 @@ static void check_work_pending(struct mptcp_sock *msk)
static void mptcp_pm_create_subflow_or_signal_addr(struct mptcp_sock *msk)
{
struct mptcp_addr_info remote = { 0 };
struct sock *sk = (struct sock *)msk;
struct mptcp_pm_addr_entry *local;
struct mptcp_addr_info remote;
struct pm_nl_pernet *pernet;
pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
@ -323,10 +333,13 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
* addr
*/
local_address((struct sock_common *)msk, &msk_local);
local_address((struct sock_common *)msk, &skc_local);
local_address((struct sock_common *)skc, &skc_local);
if (addresses_equal(&msk_local, &skc_local, false))
return 0;
if (address_zero(&skc_local))
return 0;
pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
rcu_read_lock();

7
net/mptcp/subflow.c
View File

@ -1063,6 +1063,7 @@ int __mptcp_subflow_connect(struct sock *sk, int ifindex,
struct mptcp_sock *msk = mptcp_sk(sk);
struct mptcp_subflow_context *subflow;
struct sockaddr_storage addr;
int remote_id = remote->id;
int local_id = loc->id;
struct socket *sf;
struct sock *ssk;
@ -1107,10 +1108,11 @@ int __mptcp_subflow_connect(struct sock *sk, int ifindex,
goto failed;
mptcp_crypto_key_sha(subflow->remote_key, &remote_token, NULL);
pr_debug("msk=%p remote_token=%u local_id=%d", msk, remote_token,
local_id);
pr_debug("msk=%p remote_token=%u local_id=%d remote_id=%d", msk,
remote_token, local_id, remote_id);
subflow->remote_token = remote_token;
subflow->local_id = local_id;
subflow->remote_id = remote_id;
subflow->request_join = 1;
subflow->request_bkup = 1;
mptcp_info2sockaddr(remote, &addr);
@ -1347,6 +1349,7 @@ static void subflow_ulp_clone(const struct request_sock *req,
new_ctx->fully_established = 1;
new_ctx->backup = subflow_req->backup;
new_ctx->local_id = subflow_req->local_id;
new_ctx->remote_id = subflow_req->remote_id;
new_ctx->token = subflow_req->token;
new_ctx->thmac = subflow_req->thmac;
}