| Message ID | 20250207-net-next-mptcp-pm-misc-cleanup-2-v3-2-71753ed957de@kernel.org (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Delegated to: | Matthieu Baerts |
| Headers | show |
| Series | mptcp: pm: misc cleanups, part 2 | expand |
On Fri, Feb 07, 2025 at 02:59:20PM +0100, Matthieu Baerts (NGI0) wrote: > Since its introduction in commit 892f396c8e68 ("mptcp: netlink: issue > MP_PRIO signals from userspace PMs"), it was mandatory to specify the > remote address, because of the 'if (rem->addr.family == AF_UNSPEC)' > check done later one. > > In theory, this attribute can be optional, but it sounds better to be > precise to avoid sending the MP_PRIO on the wrong subflow, e.g. if there > are multiple subflows attached to the same local ID. This can be relaxed > later on if there is a need to act on multiple subflows with one > command. > > For the moment, the check to see if attr_rem is NULL can be removed, > because mptcp_pm_parse_entry() will do this check as well, no need to do > that differently here. > > Reviewed-by: Geliang Tang <geliang@kernel.org> > Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org>
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c index 4de38bc03ab8add367720262f353dd20cacac108..b6cf8ea1161ddc7f0f1662320aebfe720f55e722 100644 --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -580,11 +580,9 @@ int mptcp_userspace_pm_set_flags(struct sk_buff *skb, struct genl_info *info) 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; - } + 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) {
Since its introduction in commit 892f396c8e68 ("mptcp: netlink: issue MP_PRIO signals from userspace PMs"), it was mandatory to specify the remote address, because of the 'if (rem->addr.family == AF_UNSPEC)' check done later one. In theory, this attribute can be optional, but it sounds better to be precise to avoid sending the MP_PRIO on the wrong subflow, e.g. if there are multiple subflows attached to the same local ID. This can be relaxed later on if there is a need to act on multiple subflows with one command. For the moment, the check to see if attr_rem is NULL can be removed, because mptcp_pm_parse_entry() will do this check as well, no need to do that differently here. Reviewed-by: Geliang Tang <geliang@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> --- net/mptcp/pm_userspace.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)