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mptcp: add rm_list_tx in mptcp_pm_data

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This patch added a new member rm_list_tx for struct mptcp_pm_data as the
removing address list on the outgoing direction. Initialize its nr field
to zero in mptcp_pm_data_init.

In mptcp_pm_remove_anno_addr, put the single address id into an removing
list, and passed it to mptcp_pm_remove_addr.

In mptcp_pm_remove_addr, save the input rm_list to rm_list_tx in struct
mptcp_pm_data.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geliang Tang 2021-03-12 17:16:12 -08:00 committed by David S. Miller
parent 6445e17af7
commit cbde278718
3 changed files with 18 additions and 10 deletions
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20
net/mptcp/pm.c
View file

@ -39,18 +39,18 @@ int mptcp_pm_announce_addr(struct mptcp_sock *msk,
return 0;
}
int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id)
int mptcp_pm_remove_addr(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list)
{
u8 rm_addr = READ_ONCE(msk->pm.addr_signal);
pr_debug("msk=%p, local_id=%d", msk, local_id);
pr_debug("msk=%p, rm_list_nr=%d", msk, rm_list->nr);
if (rm_addr) {
pr_warn("addr_signal error, rm_addr=%d", rm_addr);
return -EINVAL;
}
msk->pm.rm_id = local_id;
msk->pm.rm_list_tx = *rm_list;
rm_addr |= BIT(MPTCP_RM_ADDR_SIGNAL);
WRITE_ONCE(msk->pm.addr_signal, rm_addr);
return 0;
@ -260,7 +260,7 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
struct mptcp_rm_list *rm_list)
{
int ret = false;
int ret = false, len;
spin_lock_bh(&msk->pm.lock);
@ -268,11 +268,15 @@ bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
if (!mptcp_pm_should_rm_signal(msk))
goto out_unlock;
if (remaining < TCPOLEN_MPTCP_RM_ADDR_BASE)
len = mptcp_rm_addr_len(&msk->pm.rm_list_tx);
if (len < 0) {
WRITE_ONCE(msk->pm.addr_signal, 0);
goto out_unlock;
}
if (remaining < len)
goto out_unlock;
rm_list->ids[0] = msk->pm.rm_id;
rm_list->nr = 1;
*rm_list = msk->pm.rm_list_tx;
WRITE_ONCE(msk->pm.addr_signal, 0);
ret = true;
@ -292,7 +296,7 @@ void mptcp_pm_data_init(struct mptcp_sock *msk)
msk->pm.add_addr_accepted = 0;
msk->pm.local_addr_used = 0;
msk->pm.subflows = 0;
msk->pm.rm_id = 0;
msk->pm.rm_list_tx.nr = 0;
WRITE_ONCE(msk->pm.work_pending, false);
WRITE_ONCE(msk->pm.addr_signal, 0);
WRITE_ONCE(msk->pm.accept_addr, false);

5
net/mptcp/pm_netlink.c
View file

@ -1071,12 +1071,15 @@ static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk,
struct mptcp_addr_info *addr,
bool force)
{
struct mptcp_rm_list list = { .nr = 0 };
bool ret;
list.ids[list.nr++] = addr->id;
ret = remove_anno_list_by_saddr(msk, addr);
if (ret || force) {
spin_lock_bh(&msk->pm.lock);
mptcp_pm_remove_addr(msk, addr->id);
mptcp_pm_remove_addr(msk, &list);
spin_unlock_bh(&msk->pm.lock);
}
return ret;

3
net/mptcp/protocol.h
View file

@ -207,6 +207,7 @@ struct mptcp_pm_data {
u8 local_addr_used;
u8 subflows;
u8 status;
struct mptcp_rm_list rm_list_tx;
u8 rm_id;
};
@ -661,7 +662,7 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk,
int mptcp_pm_announce_addr(struct mptcp_sock *msk,
const struct mptcp_addr_info *addr,
bool echo, bool port);
int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id);
int mptcp_pm_remove_addr(struct mptcp_sock *msk, const struct mptcp_rm_list *rm_list);
int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 local_id);
void mptcp_event(enum mptcp_event_type type, const struct mptcp_sock *msk,