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| author | Geliang Tang <geliang.tang@suse.com> | 2023-06-04 20:25:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-14 11:15:26 +0200 |
| commit | d80a36ad400e1bc69a50e25606d22d2025ecee3a (patch) | |
| tree | d6f1a68a08e1f956dd75f76d7147338083389ebb /net/mptcp | |
| parent | e0b04a9f97dd52b22adaff7988c424c65a7d6d66 (diff) | |
| download | linux-d80a36ad400e1bc69a50e25606d22d2025ecee3a.tar.gz | |
mptcp: only send RM_ADDR in nl_cmd_remove
commit 8b1c94da1e481090f24127b2c420b0c0b0421ce3 upstream.
The specifications from [1] about the "REMOVE" command say:
Announce that an address has been lost to the peer
It was then only supposed to send a RM_ADDR and not trying to delete
associated subflows.
A new helper mptcp_pm_remove_addrs() is then introduced to do just
that, compared to mptcp_pm_remove_addrs_and_subflows() also removing
subflows.
To delete a subflow, the userspace daemon can use the "SUB_DESTROY"
command, see mptcp_nl_cmd_sf_destroy().
Fixes: d9a4594edabf ("mptcp: netlink: Add MPTCP_PM_CMD_REMOVE")
Link: https://github.com/multipath-tcp/mptcp/blob/mptcp_v0.96/include/uapi/linux/mptcp.h [1]
Cc: stable@vger.kernel.org
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/pm_netlink.c | 18 | ||||
| -rw-r--r-- | net/mptcp/pm_userspace.c | 2 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 1 |
3 files changed, 20 insertions, 1 deletions
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 1c69e476f4ad..01d34ee4525e 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1550,6 +1550,24 @@ static int mptcp_nl_cmd_del_addr(struct sk_buff *skb, struct genl_info *info) return ret; } +void mptcp_pm_remove_addrs(struct mptcp_sock *msk, struct list_head *rm_list) +{ + struct mptcp_rm_list alist = { .nr = 0 }; + struct mptcp_pm_addr_entry *entry; + + list_for_each_entry(entry, rm_list, list) { + remove_anno_list_by_saddr(msk, &entry->addr); + if (alist.nr < MPTCP_RM_IDS_MAX) + alist.ids[alist.nr++] = entry->addr.id; + } + + if (alist.nr) { + spin_lock_bh(&msk->pm.lock); + mptcp_pm_remove_addr(msk, &alist); + spin_unlock_bh(&msk->pm.lock); + } +} + void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk, struct list_head *rm_list) { diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index c1d6cd5b188c..a0c1e321f2e9 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -231,7 +231,7 @@ int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info) list_move(&match->list, &free_list); - mptcp_pm_remove_addrs_and_subflows(msk, &free_list); + mptcp_pm_remove_addrs(msk, &free_list); release_sock((struct sock *)msk); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 55fc5e42082e..fc00dd587a29 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -820,6 +820,7 @@ int mptcp_pm_announce_addr(struct mptcp_sock *msk, bool echo); 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, const struct mptcp_rm_list *rm_list); +void mptcp_pm_remove_addrs(struct mptcp_sock *msk, struct list_head *rm_list); void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk, struct list_head *rm_list); |