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| author | Nathan Harold <nharold@google.com> | 2018-06-29 15:07:10 -0700 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2018-07-01 17:47:10 +0200 |
| commit | 6d8e85ffe17895d7bc632dfbaa9e2e33b22fe873 (patch) | |
| tree | 597eed2e596e9a92cc1957df6ad7d41b50c39aea /net/xfrm | |
| parent | e4db5b61c572475bbbcf63e3c8a2606bfccf2c9d (diff) | |
| download | linux-6d8e85ffe17895d7bc632dfbaa9e2e33b22fe873.tar.bz2 | |
xfrm: Allow Set Mark to be Updated Using UPDSA
Allow UPDSA to change "set mark" to permit
policy separation of packet routing decisions from
SA keying in systems that use mark-based routing.
The set mark, used as a routing and firewall mark
for outbound packets, is made update-able which
allows routing decisions to be handled independently
of keying/SA creation. To maintain consistency with
other optional attributes, the set mark is only
updated if sent with a non-zero value.
The per-SA lock and the xfrm_state_lock are taken in
that order to avoid a deadlock with
xfrm_timer_handler(), which also takes the locks in
that order.
Signed-off-by: Nathan Harold <nharold@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_state.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index e04a510ec992..c9ffcdfa89f6 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1562,6 +1562,15 @@ out: if (x1->curlft.use_time) xfrm_state_check_expire(x1); + if (x->props.smark.m || x->props.smark.v) { + spin_lock_bh(&net->xfrm.xfrm_state_lock); + + x1->props.smark = x->props.smark; + + __xfrm_state_bump_genids(x1); + spin_unlock_bh(&net->xfrm.xfrm_state_lock); + } + err = 0; x->km.state = XFRM_STATE_DEAD; __xfrm_state_put(x); |