May 2019 - mptcp - Ml01.01.Org

[PATCH] mptcp:init: panic in case of error

by Matthieu Baerts

The idea is to mimic what is done in tcp_init() and not ignore errors from the init phase. It also simplifies the code as we don't have to manage exit parts anymore. Can be squashed in: - "mptcp: Add MPTCP socket stubs" (mptcp_init()) - "mptcp: Associate MPTCP context with TCP socket" (subflow_init()) - "mptcp: Create SUBFLOW socket for incoming connections" (subflow_ops) Signed-off-by: Matthieu Baerts <matthieu.baerts(a)tessares.net> --- net/mptcp/protocol.c | 20 ++++---------------- net/mptcp/protocol.h | 3 +-- net/mptcp/subflow.c | 27 +++++---------------------- 3 files changed, 10 insertions(+), 40 deletions(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 4e809719dcfd..b342cd4115da 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -992,10 +992,8 @@ static struct inet_protosw mptcp_protosw = { .flags = INET_PROTOSW_ICSK, }; -void mptcp_init(void) +void __init mptcp_init(void) { - int err; - mptcp_prot.h.hashinfo = tcp_prot.h.hashinfo; mptcp_stream_ops = inet_stream_ops; mptcp_stream_ops.bind = mptcp_bind; @@ -1008,22 +1006,12 @@ void mptcp_init(void) token_init(); crypto_init(); + subflow_init(); - err = subflow_init(); - if (err) - goto subflow_failed; - - err = proto_register(&mptcp_prot, 1); - if (err) - goto proto_failed; + if (proto_register(&mptcp_prot, 1) != 0) + panic("Failed to register MPTCP proto.\n"); inet_register_protosw(&mptcp_protosw); return; - -proto_failed: - subflow_exit(); - -subflow_failed: - return; } diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 258325e42fa4..c1a39e31f641 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -105,8 +105,7 @@ static inline struct socket *mptcp_subflow_tcp_socket(const struct subflow_conte return subflow->tcp_sock; } -int subflow_init(void); -void subflow_exit(void); +void subflow_init(void); extern const struct inet_connection_sock_af_ops ipv4_specific; diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 1b8ec517c687..19f36ba6841f 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -286,19 +286,11 @@ static int subflow_ops_init(struct request_sock_ops *subflow_ops) return 0; } -static void subflow_ops_exit(void) +void subflow_init(void) { - kmem_cache_destroy(subflow_request_sock_ops.slab); -} - -int subflow_init(void) -{ - int ret; - subflow_request_sock_ops = tcp_request_sock_ops; - ret = subflow_ops_init(&subflow_request_sock_ops); - if (ret != 0) - return ret; + if (subflow_ops_init(&subflow_request_sock_ops) != 0) + panic("MPTCP: failed to init subflow request sock ops"); subflow_request_sock_ipv4_ops = tcp_request_sock_ipv4_ops; subflow_request_sock_ipv4_ops.init_req = subflow_v4_init_req; @@ -309,15 +301,6 @@ int subflow_init(void) subflow_specific.sk_rx_dst_set = subflow_finish_connect; subflow_specific.rebuild_header = subflow_rebuild_header; - ret = tcp_register_ulp(&subflow_ulp_ops); - if (ret != 0) - subflow_ops_exit(); - - return ret; -} - -void subflow_exit(void) -{ - tcp_unregister_ulp(&subflow_ulp_ops); - subflow_ops_exit(); + if (tcp_register_ulp(&subflow_ulp_ops) != 0) + panic("MPTCP: failed to register subflows to ULP"); } -- 2.20.1

12 months

2
2
0 / 0

KSelftests warnings: Replaced mapping before it was done

by Matthieu Baerts

Hello, As just discussed, I have this warning when launching kselftests: Replaced mapping before it was done Here are the logs when KASAN and PROVE_LOCKING are used: TAP version 13 1..1 # selftests: mptcp: mptcp_connect.sh [ 40.042417] IPv6: ADDRCONF(NETDEV_CHANGE): ns1eth2: link becomes ready [ 40.258626] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth3: link becomes ready [ 40.488896] IPv6: ADDRCONF(NETDEV_CHANGE): ns3eth4: link becomes ready # Created /tmp/tmp.GJv3xyPEgr (size 5220870) containing data sent by client # Created /tmp/tmp.qFsIUFmpRA (size 2720072) containing data sent by server # ns1 MPTCP -> ns1 (10.0.1.1:10000) MPTCP [ 40.852761] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth1: link becomes ready [ OK ] # ns1 MPTCP -> ns1 (10.0.1.1:10001) TCP [ OK ] # ns1 TCP -> ns1 (10.0.1.1:10002) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.1.2:10003) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.1.2:10004) TCP [ OK ] # ns1 TCP -> ns2 (10.0.1.2:10005) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.2.1:10006) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.2.1:10007) TCP [ OK ] # ns1 TCP -> ns2 (10.0.2.1:10008) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.2.2:10009) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.2.2:10010) TCP [ OK ] # ns1 TCP -> ns3 (10.0.2.2:10011) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.3.2:10012) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.3.2:10013) TCP [ OK ] # ns1 TCP -> ns3 (10.0.3.2:10014) MPTCP [ OK ] # ns1 MPTCP -> ns4 (10.0.3.1:10015) MPTCP [ 62.510172] Replaced mapping before it was done [ 62.510714] Replaced mapping before it was done [ 62.516202] Replaced mapping before it was done [ 62.556681] Replaced mapping before it was done [ 62.561805] Replaced mapping before it was done [ 62.574194] Replaced mapping before it was done [ 62.586401] Replaced mapping before it was done [ 62.599163] Replaced mapping before it was done [ 62.611202] Replaced mapping before it was done [ 62.623341] Replaced mapping before it was done [ 62.624615] Replaced mapping before it was done [ 62.636842] Replaced mapping before it was done [ 62.649633] Replaced mapping before it was done [ 62.662349] Replaced mapping before it was done [ 62.663527] Replaced mapping before it was done [ 62.675872] Replaced mapping before it was done [ 62.677086] Replaced mapping before it was done [ 62.688965] Replaced mapping before it was done [ 62.690260] Replaced mapping before it was done [ 62.702386] Replaced mapping before it was done [ 62.704102] Replaced mapping before it was done [ 62.715569] Replaced mapping before it was done [ 62.717106] Replaced mapping before it was done [ 62.728812] Replaced mapping before it was done [ 62.730497] Replaced mapping before it was done [ 62.731282] Replaced mapping before it was done [ 62.742104] Replaced mapping before it was done [ 62.743546] Replaced mapping before it was done [ 62.744334] Replaced mapping before it was done [ 62.745559] Replaced mapping before it was done [ 62.756356] Replaced mapping before it was done [ OK ] # ns1 MPTCP -> ns4 (10.0.3.1:10016) TCP [ OK ] # ns1 TCP -> ns4 (10.0.3.1:10017) MPTCP [ OK ] # ns2 MPTCP -> ns1 (10.0.1.1:10018) MPTCP [ OK ] # ns2 MPTCP -> ns1 (10.0.1.1:10019) TCP [ OK ] # ns2 TCP -> ns1 (10.0.1.1:10020) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.1.2:10021) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.1.2:10022) TCP [ OK ] # ns2 TCP -> ns2 (10.0.1.2:10023) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.2.1:10024) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.2.1:10025) TCP [ OK ] # ns2 TCP -> ns2 (10.0.2.1:10026) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.2.2:10027) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.2.2:10028) TCP [ OK ] # ns2 TCP -> ns3 (10.0.2.2:10029) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.3.2:10030) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.3.2:10031) TCP [ OK ] # ns2 TCP -> ns3 (10.0.3.2:10032) MPTCP [ OK ] # ns2 MPTCP -> ns4 (10.0.3.1:10033) MPTCP [ 62.757636] Replaced mapping before it was done [ 95.298199] Replaced mapping before it was done [ 95.327847] Replaced mapping before it was done [ 95.328602] Replaced mapping before it was done [ 95.329316] Replaced mapping before it was done [ 95.351276] Replaced mapping before it was done [ 95.352074] Replaced mapping before it was done [ 95.352909] Replaced mapping before it was done [ 95.353684] Replaced mapping before it was done [ 95.354498] Replaced mapping before it was done [ 95.357110] Replaced mapping before it was done [ 95.358564] Replaced mapping before it was done [ 95.359667] Replaced mapping before it was done [ 95.360482] Replaced mapping before it was done [ 95.366152] Replaced mapping before it was done [ 95.367832] Replaced mapping before it was done [ 95.369141] Replaced mapping before it was done [ 95.370752] Replaced mapping before it was done [ 95.371547] Replaced mapping before it was done [ 95.390047] Replaced mapping before it was done [ 95.390959] Replaced mapping before it was done [ 95.391833] Replaced mapping before it was done [ 95.392758] Replaced mapping before it was done [ 95.393905] Replaced mapping before it was done [ 95.394920] Replaced mapping before it was done [ 95.395848] Replaced mapping before it was done [ 95.396774] Replaced mapping before it was done [ 95.397696] Replaced mapping before it was done [ 95.398619] Replaced mapping before it was done [ 95.399532] Replaced mapping before it was done [ 95.405810] Replaced mapping before it was done [ 95.406954] Replaced mapping before it was done [ 95.407902] Replaced mapping before it was done [ 95.408827] Replaced mapping before it was done [ 95.409750] Replaced mapping before it was done [ 95.410612] Replaced mapping before it was done [ 95.411502] Replaced mapping before it was done [ 95.412339] Replaced mapping before it was done [ 95.413233] Replaced mapping before it was done [ 95.414120] Replaced mapping before it was done [ 95.422271] Replaced mapping before it was done [ 95.423322] Replaced mapping before it was done [ 95.424358] Replaced mapping before it was done [ 95.425294] Replaced mapping before it was done [ 95.426348] Replaced mapping before it was done [ 95.427287] Replaced mapping before it was done [ 95.428526] Replaced mapping before it was done [ 95.429472] Replaced mapping before it was done [ 95.430418] Replaced mapping before it was done [ 95.431471] Replaced mapping before it was done [ 95.432262] Replaced mapping before it was done [ 95.433056] Replaced mapping before it was done [ 95.433842] Replaced mapping before it was done [ 95.434927] Replaced mapping before it was done [ 95.435701] Replaced mapping before it was done [ 95.436449] Replaced mapping before it was done [ 95.437232] Replaced mapping before it was done [ 95.437993] Replaced mapping before it was done [ 95.439034] Replaced mapping before it was done [ 95.439832] Replaced mapping before it was done [ 95.440600] Replaced mapping before it was done [ 95.441388] Replaced mapping before it was done [ 95.442458] Replaced mapping before it was done [ 95.443240] Replaced mapping before it was done [ 95.444022] Replaced mapping before it was done [ 95.444814] Replaced mapping before it was done [ 95.445599] Replaced mapping before it was done [ 95.446345] Replaced mapping before it was done [ 95.447327] Replaced mapping before it was done [ 95.448120] Replaced mapping before it was done [ 95.448888] Replaced mapping before it was done [ 95.449662] Replaced mapping before it was done [ OK ] # ns2 MPTCP -> ns4 (10.0.3.1:10034) TCP [ OK ] # ns2 TCP -> ns4 (10.0.3.1:10035) MPTCP [ OK ] # ns3 MPTCP -> ns1 (10.0.1.1:10036) MPTCP [ 95.450451] Replaced mapping before it was done [ 112.571520] Replaced mapping before it was done [ 112.587209] Replaced mapping before it was done [ 112.594369] Replaced mapping before it was done [ 112.600594] Replaced mapping before it was done [ 112.612149] Replaced mapping before it was done [ 112.613490] Replaced mapping before it was done [ 112.626688] Replaced mapping before it was done [ 112.644450] Replaced mapping before it was done [ 112.651502] Replaced mapping before it was done [ 112.654026] Replaced mapping before it was done [ 112.656538] Replaced mapping before it was done [ 112.658511] Replaced mapping before it was done [ 112.661683] Replaced mapping before it was done [ 112.666669] Replaced mapping before it was done [ 112.669327] Replaced mapping before it was done [ 112.693197] Replaced mapping before it was done [ 112.697572] Replaced mapping before it was done [ 112.701228] Replaced mapping before it was done [ 112.709456] Replaced mapping before it was done [ 112.718214] Replaced mapping before it was done [ 112.734514] Replaced mapping before it was done [ 112.744116] Replaced mapping before it was done [ 112.751082] Replaced mapping before it was done [ 112.767345] Replaced mapping before it was done [ 112.768081] Replaced mapping before it was done [ 112.771245] Replaced mapping before it was done [ 112.774876] Replaced mapping before it was done [ 112.778511] Replaced mapping before it was done [ 112.787584] Replaced mapping before it was done [ 112.801550] Replaced mapping before it was done [ 112.807544] Replaced mapping before it was done [ 112.810806] Replaced mapping before it was done [ 112.811494] Replaced mapping before it was done [ 112.815067] Replaced mapping before it was done [ 112.821310] Replaced mapping before it was done [ 112.822963] Replaced mapping before it was done [ 112.833031] Replaced mapping before it was done [ 112.878348] Replaced mapping before it was done [ 112.881293] Replaced mapping before it was done [ 112.884245] Replaced mapping before it was done [ 112.887241] Replaced mapping before it was done [ 112.890213] Replaced mapping before it was done [ 112.893226] Replaced mapping before it was done [ 112.896229] Replaced mapping before it was done [ 112.907315] Replaced mapping before it was done [ 112.909335] Replaced mapping before it was done [ 112.914545] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns1 (10.0.1.1:10037) TCP [ OK ] # ns3 TCP -> ns1 (10.0.1.1:10038) MPTCP [ OK ] # ns3 MPTCP -> ns2 (10.0.1.2:10039) MPTCP [ 112.915654] Replaced mapping before it was done [ 116.878194] Replaced mapping before it was done [ 116.893826] Replaced mapping before it was done [ 116.911705] Replaced mapping before it was done [ 116.951919] Replaced mapping before it was done [ 116.986086] Replaced mapping before it was done [ 117.006014] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns2 (10.0.1.2:10040) TCP [ OK ] # ns3 TCP -> ns2 (10.0.1.2:10041) MPTCP [ OK ] # ns3 MPTCP -> ns2 (10.0.2.1:10042) MPTCP [ 117.011297] Replaced mapping before it was done [ 120.941688] Replaced mapping before it was done [ 120.948442] Replaced mapping before it was done [ 120.953012] Replaced mapping before it was done [ 120.954179] Replaced mapping before it was done [ 120.955886] Replaced mapping before it was done [ 120.961897] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns2 (10.0.2.1:10043) TCP [ OK ] # ns3 TCP -> ns2 (10.0.2.1:10044) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.2.2:10045) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.2.2:10046) TCP [ OK ] # ns3 TCP -> ns3 (10.0.2.2:10047) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.3.2:10048) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.3.2:10049) TCP [ OK ] # ns3 TCP -> ns3 (10.0.3.2:10050) MPTCP [ OK ] # ns3 MPTCP -> ns4 (10.0.3.1:10051) MPTCP [ OK ] # ns3 MPTCP -> ns4 (10.0.3.1:10052) TCP [ OK ] # ns3 TCP -> ns4 (10.0.3.1:10053) MPTCP [ OK ] # ns4 MPTCP -> ns1 (10.0.1.1:10054) MPTCP [ 121.015360] Replaced mapping before it was done [ 147.456471] Replaced mapping before it was done [ 147.506210] Replaced mapping before it was done [ 147.524400] Replaced mapping before it was done [ 147.535701] Replaced mapping before it was done [ 147.540292] Replaced mapping before it was done [ 147.541784] Replaced mapping before it was done [ 147.542780] Replaced mapping before it was done [ 147.553868] Replaced mapping before it was done [ 147.555707] Replaced mapping before it was done [ 147.566386] Replaced mapping before it was done [ 147.567662] Replaced mapping before it was done [ 147.568929] Replaced mapping before it was done [ 147.574307] Replaced mapping before it was done [ 147.575560] Replaced mapping before it was done [ 147.601309] Replaced mapping before it was done [ 147.602596] Replaced mapping before it was done [ 147.603389] Replaced mapping before it was done [ 147.604688] Replaced mapping before it was done [ 147.605427] Replaced mapping before it was done [ 147.606161] Replaced mapping before it was done [ 147.614362] Replaced mapping before it was done [ 147.615564] Replaced mapping before it was done [ 147.620642] Replaced mapping before it was done [ 147.628157] Replaced mapping before it was done [ 147.629371] Replaced mapping before it was done [ 147.642333] Replaced mapping before it was done [ 147.643834] Replaced mapping before it was done [ 147.660020] Replaced mapping before it was done [ 147.660826] Replaced mapping before it was done [ 147.662040] Replaced mapping before it was done [ 147.662969] Replaced mapping before it was done [ 147.678469] Replaced mapping before it was done [ 147.679238] Replaced mapping before it was done [ 147.680509] Replaced mapping before it was done [ 147.682172] Replaced mapping before it was done [ 147.683383] Replaced mapping before it was done [ 147.684161] Replaced mapping before it was done [ 147.686807] Replaced mapping before it was done [ 147.687537] Replaced mapping before it was done [ 147.688766] Replaced mapping before it was done [ 147.689525] Replaced mapping before it was done [ 147.690748] Replaced mapping before it was done [ 147.691514] Replaced mapping before it was done [ 147.728610] Replaced mapping before it was done [ 147.729397] Replaced mapping before it was done [ 147.730603] Replaced mapping before it was done [ 147.731380] Replaced mapping before it was done [ 147.732616] Replaced mapping before it was done [ 147.733372] Replaced mapping before it was done [ 147.734519] Replaced mapping before it was done [ 147.735289] Replaced mapping before it was done [ 147.738078] Replaced mapping before it was done [ 147.741858] Replaced mapping before it was done [ 147.747656] Replaced mapping before it was done [ 147.749643] Replaced mapping before it was done [ 147.752984] Replaced mapping before it was done [ 147.753760] Replaced mapping before it was done [ 147.760328] Replaced mapping before it was done [ 147.761817] Replaced mapping before it was done [ 147.773499] Replaced mapping before it was done [ 147.774282] Replaced mapping before it was done [ 147.775019] Replaced mapping before it was done [ 147.776088] Replaced mapping before it was done [ 147.777624] Replaced mapping before it was done [ 147.778299] Replaced mapping before it was done [ 147.779434] Replaced mapping before it was done [ 147.780656] Replaced mapping before it was done [ 147.781389] Replaced mapping before it was done [ 147.784510] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns1 (10.0.1.1:10055) TCP [ OK ] # ns4 TCP -> ns1 (10.0.1.1:10056) MPTCP [ OK ] # ns4 MPTCP -> ns2 (10.0.1.2:10057) MPTCP [ 147.785279] Replaced mapping before it was done [ 157.452612] Replaced mapping before it was done [ 157.454093] Replaced mapping before it was done [ 157.457792] Replaced mapping before it was done [ 157.463385] Replaced mapping before it was done [ 157.474383] Replaced mapping before it was done [ 157.485216] Replaced mapping before it was done [ 157.493835] Replaced mapping before it was done [ 157.519095] Replaced mapping before it was done [ 157.530277] Replaced mapping before it was done [ 157.538921] Replaced mapping before it was done [ 157.551129] Replaced mapping before it was done [ 157.562293] Replaced mapping before it was done [ 157.588288] Replaced mapping before it was done [ 157.589520] Replaced mapping before it was done [ 157.599306] Replaced mapping before it was done [ 157.600596] Replaced mapping before it was done [ 157.611909] Replaced mapping before it was done [ 157.612748] Replaced mapping before it was done [ 157.614101] Replaced mapping before it was done [ 157.623566] Replaced mapping before it was done [ 157.624935] Replaced mapping before it was done [ 157.636249] Replaced mapping before it was done [ 157.637547] Replaced mapping before it was done [ 157.642686] Replaced mapping before it was done [ 157.649446] Replaced mapping before it was done [ 157.650227] Replaced mapping before it was done [ 157.651483] Replaced mapping before it was done [ 157.662030] Replaced mapping before it was done [ 157.663748] Replaced mapping before it was done [ 157.665401] Replaced mapping before it was done [ 157.666178] Replaced mapping before it was done [ 157.676388] Replaced mapping before it was done [ 157.677191] Replaced mapping before it was done [ 157.678369] Replaced mapping before it was done [ 157.679087] Replaced mapping before it was done [ 157.690077] Replaced mapping before it was done [ 157.690824] Replaced mapping before it was done [ 157.692002] Replaced mapping before it was done [ 157.692786] Replaced mapping before it was done [ 157.694010] Replaced mapping before it was done [ 157.694784] Replaced mapping before it was done [ 157.703884] Replaced mapping before it was done [ 157.704634] Replaced mapping before it was done [ 157.705816] Replaced mapping before it was done [ 157.706580] Replaced mapping before it was done [ 157.708002] Replaced mapping before it was done [ 157.708800] Replaced mapping before it was done [ 157.718261] Replaced mapping before it was done [ 157.719053] Replaced mapping before it was done [ 157.720240] Replaced mapping before it was done [ 157.721016] Replaced mapping before it was done [ 157.722471] Replaced mapping before it was done [ 157.723247] Replaced mapping before it was done [ 157.736450] Replaced mapping before it was done [ 157.737240] Replaced mapping before it was done [ 157.738429] Replaced mapping before it was done [ 157.739208] Replaced mapping before it was done [ 157.740430] Replaced mapping before it was done [ 157.741213] Replaced mapping before it was done [ 157.752235] Replaced mapping before it was done [ 157.753022] Replaced mapping before it was done [ 157.754222] Replaced mapping before it was done [ 157.755002] Replaced mapping before it was done [ 157.755764] Replaced mapping before it was done [ 157.756923] Replaced mapping before it was done [ 157.757693] Replaced mapping before it was done [ 157.764862] Replaced mapping before it was done [ 157.765613] Replaced mapping before it was done [ 157.766410] Replaced mapping before it was done [ 157.767578] Replaced mapping before it was done [ 157.768789] Replaced mapping before it was done [ 157.769997] Replaced mapping before it was done [ 157.770796] Replaced mapping before it was done [ 157.772156] Replaced mapping before it was done [ 157.772939] Replaced mapping before it was done [ 157.778911] Replaced mapping before it was done [ 157.779687] Replaced mapping before it was done [ 157.780897] Replaced mapping before it was done [ 157.781667] Replaced mapping before it was done [ 157.783569] Replaced mapping before it was done [ 157.784324] Replaced mapping before it was done [ 157.785473] Replaced mapping before it was done [ 157.786384] Replaced mapping before it was done [ 157.792879] Replaced mapping before it was done [ 157.796139] Replaced mapping before it was done [ 157.797561] Replaced mapping before it was done [ 157.799165] Replaced mapping before it was done [ 157.799962] Replaced mapping before it was done [ 157.801428] Replaced mapping before it was done [ 157.802222] Replaced mapping before it was done [ 157.804827] Replaced mapping before it was done [ 157.805598] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns2 (10.0.1.2:10058) TCP [ OK ] # ns4 TCP -> ns2 (10.0.1.2:10059) MPTCP [ OK ] # ns4 MPTCP -> ns2 (10.0.2.1:10060) MPTCP [ 157.806789] Replaced mapping before it was done [ 166.903183] Replaced mapping before it was done [ 166.943365] Replaced mapping before it was done [ 166.948613] Replaced mapping before it was done [ 166.962651] Replaced mapping before it was done [ 166.963987] Replaced mapping before it was done [ 166.976260] Replaced mapping before it was done [ 166.987087] Replaced mapping before it was done [ 166.991032] Replaced mapping before it was done [ 167.003736] Replaced mapping before it was done [ 167.014847] Replaced mapping before it was done [ 167.016107] Replaced mapping before it was done [ 167.026187] Replaced mapping before it was done [ 167.038067] Replaced mapping before it was done [ 167.039304] Replaced mapping before it was done [ 167.052895] Replaced mapping before it was done [ 167.054371] Replaced mapping before it was done [ 167.055112] Replaced mapping before it was done [ 167.065909] Replaced mapping before it was done [ 167.067527] Replaced mapping before it was done [ 167.068299] Replaced mapping before it was done [ 167.078825] Replaced mapping before it was done [ 167.080105] Replaced mapping before it was done [ 167.091030] Replaced mapping before it was done [ 167.092289] Replaced mapping before it was done [ 167.103328] Replaced mapping before it was done [ 167.104098] Replaced mapping before it was done [ 167.105320] Replaced mapping before it was done [ 167.106236] Replaced mapping before it was done [ 167.107474] Replaced mapping before it was done [ 167.119817] Replaced mapping before it was done [ 167.125628] Replaced mapping before it was done [ 167.126415] Replaced mapping before it was done [ 167.127587] Replaced mapping before it was done [ 167.128422] Replaced mapping before it was done [ 167.139439] Replaced mapping before it was done [ 167.144177] Replaced mapping before it was done [ 167.145900] Replaced mapping before it was done [ 167.146792] Replaced mapping before it was done [ 167.147988] Replaced mapping before it was done [ 167.148819] Replaced mapping before it was done [ 167.149992] Replaced mapping before it was done [ 167.150932] Replaced mapping before it was done [ 167.152217] Replaced mapping before it was done [ 167.153009] Replaced mapping before it was done [ 167.158968] Replaced mapping before it was done [ 167.159759] Replaced mapping before it was done [ 167.160533] Replaced mapping before it was done [ 167.161618] Replaced mapping before it was done [ 167.162388] Replaced mapping before it was done [ 167.163119] Replaced mapping before it was done [ 167.163892] Replaced mapping before it was done [ 167.165032] Replaced mapping before it was done [ 167.165993] Replaced mapping before it was done [ 167.166781] Replaced mapping before it was done [ 167.177238] Replaced mapping before it was done [ 167.178028] Replaced mapping before it was done [ 167.178811] Replaced mapping before it was done [ 167.180117] Replaced mapping before it was done [ 167.181053] Replaced mapping before it was done [ 167.181994] Replaced mapping before it was done [ 167.183179] Replaced mapping before it was done [ 167.183928] Replaced mapping before it was done [ 167.184663] Replaced mapping before it was done [ 167.185701] Replaced mapping before it was done [ 167.186422] Replaced mapping before it was done [ 167.192883] Replaced mapping before it was done [ 167.193650] Replaced mapping before it was done [ 167.194830] Replaced mapping before it was done [ 167.195534] Replaced mapping before it was done [ 167.196665] Replaced mapping before it was done [ 167.197387] Replaced mapping before it was done [ 167.198535] Replaced mapping before it was done [ 167.199454] Replaced mapping before it was done [ 167.200589] Replaced mapping before it was done [ 167.201497] Replaced mapping before it was done [ 167.211678] Replaced mapping before it was done [ 167.213060] Replaced mapping before it was done [ 167.214417] Replaced mapping before it was done [ 167.215378] Replaced mapping before it was done [ 167.216302] Replaced mapping before it was done [ 167.224399] Replaced mapping before it was done [ 167.225225] Replaced mapping before it was done [ 167.226002] Replaced mapping before it was done [ 167.227140] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns2 (10.0.2.1:10061) TCP [ OK ] # ns4 TCP -> ns2 (10.0.2.1:10062) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.2.2:10063) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.2.2:10064) TCP [ OK ] # ns4 TCP -> ns3 (10.0.2.2:10065) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.3.2:10066) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.3.2:10067) TCP [ OK ] # ns4 TCP -> ns3 (10.0.3.2:10068) MPTCP [ OK ] # ns4 MPTCP -> ns4 (10.0.3.1:10069) MPTCP [ OK ] # ns4 MPTCP -> ns4 (10.0.3.1:10070) TCP [ OK ] # ns4 TCP -> ns4 (10.0.3.1:10071) MPTCP [ OK ] ok 1 selftests: mptcp: mptcp_connect.sh make[1]: warning: Clock skew detected. Your build may be incomplete. A bit less without KASAN and PROVE_LOCKING (launched on May 28, 2019 16:47:08 UTC) TAP version 13 1..1 # selftests: mptcp: mptcp_connect.sh [ 15.420305] ip (556) used greatest stack depth: 12168 bytes left [ 15.506125] IPv6: ADDRCONF(NETDEV_CHANGE): ns1eth2: link becomes ready # Error: Specified qdisc not found. [ 15.587395] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth3: link becomes ready # Error: Specified qdisc not found. [ 15.735700] IPv6: ADDRCONF(NETDEV_CHANGE): ns3eth4: link becomes ready # Created /tmp/tmp.p6Y0N8EF65 (size 142618) containing data sent by client # Created /tmp/tmp.wDIjuigEtN (size 1320329) containing data sent by server # ns1 MPTCP -> ns1 (10.0.1.1:10000) MPTCP [ 16.498671] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth1: link becomes ready [ OK ] # ns1 MPTCP -> ns1 (10.0.1.1:10001) TCP [ OK ] # ns1 TCP -> ns1 (10.0.1.1:10002) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.1.2:10003) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.1.2:10004) TCP [ OK ] # ns1 TCP -> ns2 (10.0.1.2:10005) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.2.1:10006) MPTCP [ OK ] # ns1 MPTCP -> ns2 (10.0.2.1:10007) TCP [ OK ] # ns1 TCP -> ns2 (10.0.2.1:10008) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.2.2:10009) MPTCP [ 26.111191] Replaced mapping before it was done [ 26.111217] Replaced mapping before it was done [ OK ] # ns1 MPTCP -> ns3 (10.0.2.2:10010) TCP [ OK ] # ns1 TCP -> ns3 (10.0.2.2:10011) MPTCP [ OK ] # ns1 MPTCP -> ns3 (10.0.3.2:10012) MPTCP [ 26.111949] Replaced mapping before it was done [ 29.213623] Replaced mapping before it was done [ 29.214367] Replaced mapping before it was done [ 29.215425] Replaced mapping before it was done [ 29.216188] Replaced mapping before it was done [ 29.216875] Replaced mapping before it was done [ 29.217566] Replaced mapping before it was done [ 29.218222] Replaced mapping before it was done [ 29.218919] Replaced mapping before it was done [ 29.219606] Replaced mapping before it was done [ 29.220284] Replaced mapping before it was done [ 29.220978] Replaced mapping before it was done [ 29.221677] Replaced mapping before it was done [ 29.222379] Replaced mapping before it was done [ 29.223062] Replaced mapping before it was done [ 29.224121] Replaced mapping before it was done [ 29.225069] Replaced mapping before it was done [ 29.225752] Replaced mapping before it was done [ 29.226462] Replaced mapping before it was done [ OK ] # ns1 MPTCP -> ns3 (10.0.3.2:10013) TCP [ OK ] # ns1 TCP -> ns3 (10.0.3.2:10014) MPTCP [ OK ] # ns1 MPTCP -> ns4 (10.0.3.1:10015) MPTCP [ 29.227212] Replaced mapping before it was done [ 32.331271] Replaced mapping before it was done [ 32.332024] Replaced mapping before it was done [ 32.332740] Replaced mapping before it was done [ 32.333487] Replaced mapping before it was done [ 32.334283] Replaced mapping before it was done [ 32.336077] Replaced mapping before it was done [ OK ] # ns1 MPTCP -> ns4 (10.0.3.1:10016) TCP [ OK ] # ns1 TCP -> ns4 (10.0.3.1:10017) MPTCP [ OK ] # ns2 MPTCP -> ns1 (10.0.1.1:10018) MPTCP [ OK ] # ns2 MPTCP -> ns1 (10.0.1.1:10019) TCP [ OK ] # ns2 TCP -> ns1 (10.0.1.1:10020) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.1.2:10021) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.1.2:10022) TCP [ OK ] # ns2 TCP -> ns2 (10.0.1.2:10023) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.2.1:10024) MPTCP [ OK ] # ns2 MPTCP -> ns2 (10.0.2.1:10025) TCP [ OK ] # ns2 TCP -> ns2 (10.0.2.1:10026) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.2.2:10027) MPTCP [ 32.336955] Replaced mapping before it was done [ 44.709910] Replaced mapping before it was done [ 44.711156] Replaced mapping before it was done [ 44.711993] Replaced mapping before it was done [ 44.712730] Replaced mapping before it was done [ 44.713422] Replaced mapping before it was done [ 44.714121] Replaced mapping before it was done [ 44.714813] Replaced mapping before it was done [ 44.715560] Replaced mapping before it was done [ 44.716425] Replaced mapping before it was done [ 44.717091] Replaced mapping before it was done [ 44.717943] Replaced mapping before it was done [ 44.718569] Replaced mapping before it was done [ 44.719232] Replaced mapping before it was done [ 44.719944] Replaced mapping before it was done [ OK ] # ns2 MPTCP -> ns3 (10.0.2.2:10028) TCP [ OK ] # ns2 TCP -> ns3 (10.0.2.2:10029) MPTCP [ OK ] # ns2 MPTCP -> ns3 (10.0.3.2:10030) MPTCP [ 44.720685] Replaced mapping before it was done [ 47.811611] Replaced mapping before it was done [ 47.812545] Replaced mapping before it was done [ 47.813250] Replaced mapping before it was done [ 47.814007] Replaced mapping before it was done [ 47.814731] Replaced mapping before it was done [ 47.815444] Replaced mapping before it was done [ 47.816155] Replaced mapping before it was done [ 47.816880] Replaced mapping before it was done [ 47.817570] Replaced mapping before it was done [ OK ] # ns2 MPTCP -> ns3 (10.0.3.2:10031) TCP [ OK ] # ns2 TCP -> ns3 (10.0.3.2:10032) MPTCP [ OK ] # ns2 MPTCP -> ns4 (10.0.3.1:10033) MPTCP [ 47.818284] Replaced mapping before it was done [ 50.919166] Replaced mapping before it was done [ 50.920186] Replaced mapping before it was done [ 50.920967] Replaced mapping before it was done [ 50.921695] Replaced mapping before it was done [ 50.922365] Replaced mapping before it was done [ OK ] # ns2 MPTCP -> ns4 (10.0.3.1:10034) TCP [ OK ] # ns2 TCP -> ns4 (10.0.3.1:10035) MPTCP [ OK ] # ns3 MPTCP -> ns1 (10.0.1.1:10036) MPTCP [ 50.923077] Replaced mapping before it was done [ 54.023781] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns1 (10.0.1.1:10037) TCP [ OK ] # ns3 TCP -> ns1 (10.0.1.1:10038) MPTCP [ OK ] # ns3 MPTCP -> ns2 (10.0.1.2:10039) MPTCP [ 54.024528] Replaced mapping before it was done [ 57.122333] Replaced mapping before it was done [ 57.123256] Replaced mapping before it was done [ 57.123867] Replaced mapping before it was done [ 57.125187] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns2 (10.0.1.2:10040) TCP [ OK ] # ns3 TCP -> ns2 (10.0.1.2:10041) MPTCP [ OK ] # ns3 MPTCP -> ns2 (10.0.2.1:10042) MPTCP [ 57.125966] Replaced mapping before it was done [ 60.223267] Replaced mapping before it was done [ 60.223975] Replaced mapping before it was done [ 60.224649] Replaced mapping before it was done [ OK ] # ns3 MPTCP -> ns2 (10.0.2.1:10043) TCP [ OK ] # ns3 TCP -> ns2 (10.0.2.1:10044) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.2.2:10045) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.2.2:10046) TCP [ OK ] # ns3 TCP -> ns3 (10.0.2.2:10047) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.3.2:10048) MPTCP [ OK ] # ns3 MPTCP -> ns3 (10.0.3.2:10049) TCP [ OK ] # ns3 TCP -> ns3 (10.0.3.2:10050) MPTCP [ OK ] # ns3 MPTCP -> ns4 (10.0.3.1:10051) MPTCP [ OK ] # ns3 MPTCP -> ns4 (10.0.3.1:10052) TCP [ OK ] # ns3 TCP -> ns4 (10.0.3.1:10053) MPTCP [ OK ] # ns4 MPTCP -> ns1 (10.0.1.1:10054) MPTCP [ 60.225606] Replaced mapping before it was done [ 72.597843] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns1 (10.0.1.1:10055) TCP [ OK ] # ns4 TCP -> ns1 (10.0.1.1:10056) MPTCP [ OK ] # ns4 MPTCP -> ns2 (10.0.1.2:10057) MPTCP [ 72.598742] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns2 (10.0.1.2:10058) TCP [ OK ] # ns4 TCP -> ns2 (10.0.1.2:10059) MPTCP [ OK ] # ns4 MPTCP -> ns2 (10.0.2.1:10060) MPTCP [ 75.699965] Replaced mapping before it was done [ OK ] # ns4 MPTCP -> ns2 (10.0.2.1:10061) TCP [ OK ] # ns4 TCP -> ns2 (10.0.2.1:10062) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.2.2:10063) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.2.2:10064) TCP [ OK ] # ns4 TCP -> ns3 (10.0.2.2:10065) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.3.2:10066) MPTCP [ OK ] # ns4 MPTCP -> ns3 (10.0.3.2:10067) TCP [ OK ] # ns4 TCP -> ns3 (10.0.3.2:10068) MPTCP [ OK ] # ns4 MPTCP -> ns4 (10.0.3.1:10069) MPTCP [ OK ] # ns4 MPTCP -> ns4 (10.0.3.1:10070) TCP [ OK ] # ns4 TCP -> ns4 (10.0.3.1:10071) MPTCP [ OK ] ok 1 selftests: mptcp: mptcp_connect.sh make[1]: warning: Clock skew detected. Your build may be incomplete. Can be reproduced by downloading the two *virtme.sh scripts from the "scripts" branch: https://github.com/multipath-tcp/mptcp_net-next/tree/scripts/ci and launching the Docker script: bash -x patches/docker/Dockerfile.virtme.sh patches/virtme.sh Docker is the only real dependence. Cheers, Matt -- Matthieu Baerts | R&D Engineer matthieu.baerts(a)tessares.net Tessares SA | Hybrid Access Solutions www.tessares.net 1 Avenue Jean Monnet, 1348 Louvain-la-Neuve, Belgium

12 months

4
5
0 / 0

[Weekly meetings] MoM - 23rd of May 2019

by Matthieu Baerts

Hello, We just had our 51st meeting with Mat, Peter and Ossama (Intel OTC), Paolo, Davide, Florian (Red Hat) and myself (Tessares). Thanks again for this new good meeting! Here are the minutes of the meeting: Accepted patches: - mptcp: plug mptcp_accept memory leaks (3 patches): → by Florian → accepted by Peter & Mat → 2 patches have been squashed, one added at the end - mptcp: selftests: exercise GSO, retransmission and reorder code path: → by Paolo → accepted by Florian → "squashed" into "mptcp: selftests: switch to netns+veth based tests" → one note by Mat: the packet reordering is only affecting TCP reassembly, and does not exercise reassembly at the MPTCP layer differently. The stream is still delivered to the MPTCP layer in-order. MPTCP-level reassembly in the prototype implementation does not yet handle out-of-order mappings. That will get built in when updating mptcp_recvmsg() for multiple subflows. → Still a good thing to test. → We will want to test with multiple subflows, different (and variable) delay - mptcp: Add explicit check for protocol version: → by Peter → accepted by Mat → "squashed" into "mptcp: Handle MPTCP TCP options" Pending patches: - preliminary support for 'ss' (2 patches - RFC): → by Davide → are you waiting for more comments? → seems OK for the first RFC → RFC patch v2 in preparation → will propose that to net-next to have comments from ULP community and maybe already have it in net-next (useful only for kTLS for the moment) - mptcp: switch sublist to mptcp socket lock protection: → by Florian → Paolo did an internal review, will comment on the ML → Peter will comment as well → waiting for review (v2 available) - net: mptcp: don't leak 'slab' and 'slab_name' on exit: → by Davide → v1 reviewed by Mat → v2 expected - MP_JOIN handling WIP: → by Peter → quickly reviewed by Paolo → Paolo suggests to apply it quickly → we might need to make sure Selftests are still passing. → note that since we are adding some delay/losses/reording, we might have "random" failures. netconf: - planned for next month in Boston (20th of June) - Paolo and Florian will join - that will be the opportunity to talk with other net-next devs Sync with net-next: - got the first conflict, easy to resolve, more details on the ML Automatic rebase: - proposition from Mat from last week: add a tag before destroying the export branch (with the date). At least commit are not lost. - Matth: done - A tag is now generated after each "rebase": export/<date> export/20190517T115519 Future points (from last time): - In the tests, Paolo would like to introduce drops and re-order → done - Peter has work in progress for the MP_JOIN. → shared - Peter will try to share a RFC next week, also with ADD_ADDR handling. → shared - Mat looking at the DATA-FIN handling. → WIP Cover letter draft for Eric: The MPTCP upstreaming community has prepared a pre-net-next RFC patch set for review: https://github.com/multipath-tcp/mptcp_net-next/tree/<TBD> → can be export, an export tag or a dedicated branch With CONFIG_MPTCP=y, a socket created with IPPROTO_MPTCP will attempt to create an MPTCP connection but remains compatible with regular TCP. IPPROTO_TCP socket behavior is unchanged. This implementation makes use of ULP between the userspace-facing MPTCP socket and the set of in-kernel TCP sockets it controls. ULP has been extended for use with listening sockets. skb_ext is used to carry MPTCP metadata. The patch set includes a self-test to exercise MPTCP in various connection and routing scenarios. We have more work to do to reach the initial feature set for merging, notably: * Handling MP_JOIN requests to accept multiple subflows → it should be part of it * Coupling receive windows across sibling subflow TCP socket → we should mention that this is part of RFC 6824, not just a fancy feature we want to add :) * IPv6 * Not exposing the subflow ULP type to userspace Thank you for your review. You can find us at mptcp(a)lists.01.org and https://is.gd/mptcp_upstream Questions related to maintainer review: - CONFIG_MPTCP is a bool, but we have some module infrastructure in net/mptcp/. Should we remove the module code to make this consistent? - at least to be removed before sending this to Netdev ML (not to have people stopping after the first inconsistency) - same for checkpatch.pl - maybe some commits would need to be squashed as well When to send this to Eric: - MP_JOIN is changing a bit TCP code (original socket doesn't get the new subflow) - maybe OK to have the netconf as a limit minus 1 week: first half of June mptcpd (Netlink daemon for MPTCP): - Migrate to multipath-tcp.org generic netlink API. (#15) → merged in master - A few things are missing (netlink attributes missing) but it is on the good way! - Ossama has some questions, will send them to the ML mptcp.org: - new sync v4.19.36 → .44 - new fixes coming for TFO LPC 2019: - CfP for Networking sessions should open later. - confirmed on netdev ML - would be very nice to participate Next meeting: - We propose to have it next Friday, the 31st of May. - /!\ not on Thursday but on Friday /!\ - Usual time: 16:00 UTC (9am PDT, 6pm CEST) - Still open to everyone! - https://annuel2.framapad.org/p/mptcp_upstreaming_20190531 Feel free to comment on these points and propose new ones for the next meeting! Talk to you next week, Matthieu -- Matthieu Baerts | R&D Engineer matthieu.baerts(a)tessares.net Tessares SA | Hybrid Access Solutions www.tessares.net 1 Avenue Jean Monnet, 1348 Louvain-la-Neuve, Belgium

12 months

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[Weekly meetings] MoM - 31st of May 2019

by Matthieu Baerts

Hello, We just had our 52nd meeting with Mat and Ossama (Intel OTC), Christoph (Apple), Paolo, Davide and Florian (Red Hat) and myself (Tessares). Thanks again for this new good meeting! Here are the minutes of the meeting: Accepted patches: - net: mptcp: don't leak 'slab' and 'slab_name' on exit: - by Davide - accepted by Mat - squashed in "mptcp: Create SUBFLOW socket for incoming connections" - Typo in mptcp_connect.sh: - by Florian - accepted by Matth - squashed in "mptcp: selftests: switch to netns+veth based tests" - mptcp: switch sublist to mptcp socket lock protection: - by Florian - v4 accepted by Mat - added at the end - mptcp: Make mptcp initialization part of tcp initialization: - by Peter - v2 accepted by Florian - squashed in 3 different commits - small notifications done when applying the patch, see ML for more details - https://lists.01.org/pipermail/mptcp/2019-May/001272.html Pending patches: - RFC by Peter: - he is working on a v2 (+ a rebase after last changes made by Florian) - mptcp:init: panic in case of error: - by Matthieu Sync with net-next: - no sync last night because of an error: net-next doesn't compile when IPV6 not compiled: ./include/linux/netfilter_ipv6.h: In function 'nf_ipv6_br_defrag': ./include/linux/netfilter_ipv6.h:110:9: error: implicit declaration of function 'nf_ct_frag6_gather'; did you mean 'nf_ct_attach'? [-Werror=implicit-function-declaration] - fix: https://lore.kernel.org/netdev/20190531081143.21446-1-pablo@netfilter.org... - fix v2: https://patchwork.ozlabs.org/patch/1108255/ - should we always compile with IPV6 support? → We can do that later when we will have MPTCP IPv6 support How to handle sk_state on the mptcp socket: - FastClose: better to take the option B: send reset and clear resources, no need to have an extra state (WAIT_FOR_RST) - when creating the new MPTCP connection, we maintain our own state (using TCP state) - after, we are linked to the data connection → MPTCP connection. → if one sf established and one connecting, we are still in established state → we can be in a situation where there is no more subflow: → until we get a DATA_FIN → for a first version, we can also stop the MPTCP connection if there is no more subflows if it is easier in the code → we can have a timeout when there is no more subflow (and no DATA_FIN) → Break-before-make: → Mat will add note in the wiki → we will need to support that, can be done later: → https://tools.ietf.org/id/draft-defoy-mptcp-considerations-for-5g-00.html... (MP)TFO: - do we need to support it now?: → Not for a first step - if no, what to do?: - we should not break TFO without MPTCP - ignore TFO with MPTCP for the moment - be sure that TFO doesn't break MPTCP! (that was the comment from Paolo on Peter's RFC) - add some comments (TODO) if we are thinking we would need an adaptation in the future (not to forget them) locks: - (on the ML) Mat: At an earlier point we thought there would be a need to read the list without holding a lock, but I don't remember what that case was and looking at the current code the socket lock works well. - (on the ML) Christoph: I think, that was to support lockless subflow establishment, similar to the way Linux supports lockless (meaning, without taking the listener's lock) connection establishment on the server-side. - we need to take the lock when we want to add stuff to the list. To support lock-less establishment, we don't want to take MPTCP lock on the server side. To avoid taking the lock when anything want to walk through to list of sf, we need an RCU list. (racing against a 3rd ACK that confirms the SF establishment). We would only need to access the list lock when we modify the list, not when we walk through the RCU list. - Paolo: RCU adds latency overhead, especially when there are syscalls (sync needed) - difficult to know the cost of the contention we would have with a lock instead of RCU. - we don't have to support the lock-less establishment but TCP was going on this direction (lock-less) - when Christoph did that in mptcp.org, he saw a great improvement with Apache benchmark. - we can also improve this later: best design first and optimisations later. - currently some syscall can modify shared stuff: if run in //, they could create memleaks or deref pointers: - Paolo has a patch to fix some problems there - the idea would be sent them as RFC and postpone their application for after MP_JOIN support - no being able to walk through the list can be an issue for the stats, e.g.: if we want to list the MPTCP and show the number of subflows, we would like to avoid taking locks there KSelftests: - warnings: "Replaced mapping before it was done" - some were fixed by a fix from Paolo. - reproducible using: https://github.com/multipath-tcp/mptcp_net-next/tree/scripts/ci - running on a single CPU - but tests are successful - with and without KASAN and PROVE_LOCKING config. CI: - now testing KSelftests - scripts are available in the 'scripts' branch - https://github.com/multipath-tcp/mptcp_net-next/tree/scripts/ci (virtme) - Suggestions for the future: - by Mat: enable debug features like CONFIG_KASAN and CONFIG_PROVE_LOCKING in the test kernel and then check the console output for KASAN/locking issues. There is a tradeoff in speed, but it could alert us to problems the selftests alone don't catch. - done → now always running with them - But might be interesting to run without and with ↑ - TODO: Matth can update the scripts (feel free to propose changes for these scripts too!) netdev 0x14: - will be next year in March in Canada (west coast, Vancouver) LPC 2019: - nothing new Next meeting: - We propose to have it next Thursday, the 6th of June. - Christoph will not be able to join. - Usual time: 16:00 UTC (9am PDT, 6pm CEST) - Still open to everyone! - https://annuel2.framapad.org/p/mptcp_upstreaming_20190606 Feel free to comment on these points and propose new ones for the next meeting! Talk to you next week, Matthieu -- Matthieu Baerts | R&D Engineer matthieu.baerts(a)tessares.net Tessares SA | Hybrid Access Solutions www.tessares.net 1 Avenue Jean Monnet, 1348 Louvain-la-Neuve, Belgium

1 year

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[PATCH v3] mptcp: Make mptcp initialization part of tcp initialization

by Peter Krystad

Remove remnant module initialization of MPTCP and make it part of the inet/tcp initialization sequence. OK to squash but needs to be split up between "mptcp: Add MPTCP socket stubs" and "mptcp: Associate MPTCP context with TCP socket" v2 - ignore v3 - fix function declaration Signed-off-by: Peter Krystad <peter.krystad(a)linux.intel.com> --- include/net/mptcp.h | 6 ++++++ net/ipv4/tcp.c | 2 ++ net/mptcp/protocol.c | 22 +++------------------- net/mptcp/subflow.c | 15 ++++++++++++--- 4 files changed, 23 insertions(+), 22 deletions(-) diff --git a/include/net/mptcp.h b/include/net/mptcp.h index ed67b140af33..65dd7f052e94 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -49,6 +49,8 @@ struct mptcp_out_options { #ifdef CONFIG_MPTCP +void mptcp_init(void); + static inline bool sk_is_mptcp(const struct sock *sk) { return tcp_sk(sk)->is_mptcp; @@ -84,6 +86,10 @@ void mptcp_write_options(__be32 *ptr, struct mptcp_out_options *opts); #else +static inline void mptcp_init(void) +{ +} + static inline bool sk_is_mptcp(const struct sock *sk) { return false; diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index cb072dce81a7..ab242851da3f 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -275,6 +275,7 @@ #include <net/icmp.h> #include <net/inet_common.h> #include <net/tcp.h> +#include <net/mptcp.h> #include <net/xfrm.h> #include <net/ip.h> #include <net/sock.h> @@ -3947,4 +3948,5 @@ void __init tcp_init(void) tcp_metrics_init(); BUG_ON(tcp_register_congestion_control(&tcp_reno) != 0); tcp_tasklet_init(); + mptcp_init(); } diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 06312efc0b90..d1c617852e0f 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1009,7 +1009,7 @@ static struct inet_protosw mptcp_protosw = { .flags = INET_PROTOSW_ICSK, }; -static int __init mptcp_init(void) +void mptcp_init(void) { int err; @@ -1036,26 +1036,10 @@ static int __init mptcp_init(void) inet_register_protosw(&mptcp_protosw); - return 0; - + return; proto_failed: subflow_exit(); subflow_failed: - return err; -} - -static void __exit mptcp_exit(void) -{ - inet_unregister_protosw(&mptcp_protosw); - proto_unregister(&mptcp_prot); - - subflow_exit(); + return; } - -module_init(mptcp_init); -module_exit(mptcp_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS_NET_PF_PROTO(PF_INET, IPPROTO_MPTCP); -MODULE_ALIAS_NET_PF_PROTO(PF_INET6, IPPROTO_MPTCP); diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index bc8e1a0658ec..e4ae5c5d177d 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -294,6 +294,12 @@ static int subflow_ops_init(struct request_sock_ops *subflow_ops) return 0; } +static void subflow_ops_exit(void) +{ + kfree(subflow_request_sock_ops.slab_name); + kmem_cache_destroy(subflow_request_sock_ops.slab); +} + int subflow_init(void) { int ret; @@ -312,12 +318,15 @@ int subflow_init(void) subflow_specific.sk_rx_dst_set = subflow_finish_connect; subflow_specific.rebuild_header = subflow_rebuild_header; - return tcp_register_ulp(&subflow_ulp_ops); + ret = tcp_register_ulp(&subflow_ulp_ops); + if (ret != 0) + subflow_ops_exit(); + + return ret; } void subflow_exit(void) { tcp_unregister_ulp(&subflow_ulp_ops); + subflow_ops_exit(); } - -MODULE_LICENSE("GPL"); -- 2.17.2

1 year

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[RFC 0/3] MP_JOIN handling WIP

by Peter Krystad

Current state of MP_JOIN handling. As I mentioned this is not functional yet but am sharing for visibility. The intent of this patchset is to complete the handshake for a second subflow in the incoming direction. Sending an outgoing SYN with MP_JOIN and the data path is not addressed. It will already need some refactor due to Florian's changes to subflow list locking. Peter Krystad (3): mptcp: Slightly refactor mptcp_established_options_xxx() mptcp: Add ADD_ADDR handling mptcp: Add handling of incoming MP_JOIN requests include/linux/tcp.h | 6 ++ include/net/mptcp.h | 44 ++++++++++++-- include/net/tcp.h | 6 ++ net/ipv4/tcp_minisocks.c | 6 ++ net/ipv4/tcp_output.c | 31 ++++++---- net/mptcp/Makefile | 2 +- net/mptcp/options.c | 127 ++++++++++++++++++++++++++++++++++++--- net/mptcp/pm.c | 24 ++++++++ net/mptcp/protocol.c | 24 ++++++++ net/mptcp/protocol.h | 45 +++++++++++++- net/mptcp/subflow.c | 42 +++++++++++++ net/mptcp/token.c | 124 ++++++++++++++++++++++++++++++++++++++ 12 files changed, 451 insertions(+), 30 deletions(-) create mode 100644 net/mptcp/pm.c -- 2.17.2

1 year

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Change in ...mptcp_net-next[scripts]: ci:upd-tg: avoid 'tg push' 'up-to-date' error

by Matthieu Baerts (GerritHub)

Hello Mat Martineau, I'd like you to do a code review. Please visit https://review.gerrithub.io/c/multipath-tcp/mptcp_net-next/+/456463 to review the following change. Change subject: ci:upd-tg: avoid 'tg push' 'up-to-date' error ...................................................................... ci:upd-tg: avoid 'tg push' 'up-to-date' error When syncing, if our TopGit tree has been updated by someone and there is also a new update of the base, we will need to launch 'tg update' twice: once to be sync with our repo, another one to propagate the modification made in the base to the rest of the tree. Signed-off-by: Matthieu Baerts <matthieu.baerts(a)tessares.net> Change-Id: Ib142a511c240fba2df5f8ec2f0c9ed3f3c86dfa0 --- M ci/update-tg-tree.sh 1 file changed, 5 insertions(+), 0 deletions(-) git pull ssh://review.gerrithub.io:29418/multipath-tcp/mptcp_net-next refs/changes/63/456463/1 -- To view, visit https://review.gerrithub.io/c/multipath-tcp/mptcp_net-next/+/456463 To unsubscribe, or for help writing mail filters, visit https://review.gerrithub.io/settings Gerrit-Project: multipath-tcp/mptcp_net-next Gerrit-Branch: scripts Gerrit-Change-Id: Ib142a511c240fba2df5f8ec2f0c9ed3f3c86dfa0 Gerrit-Change-Number: 456463 Gerrit-PatchSet: 1 Gerrit-Owner: Matthieu Baerts <matthieu.baerts(a)tessares.net> Gerrit-Reviewer: Mat Martineau <mathew.j.martineau(a)linux.intel.com> Gerrit-MessageType: newchange

1 year

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Weekly meeting - 31 May 2019 16:00 UTC (9am PDT, 6pm CEST) - /!\ Friday this time /!\

by Matthieu Baerts

Hello everybody! Our public MPTCP upstreaming weekly web conference is NOT scheduled for tomorrow but for Friday. The list of topics is available here: https://annuel2.framapad.org/p/mptcp_upstreaming_20190531 Feel free to add/modify topics! Anybody can join the meeting using Google Meet website/app/phone: https://meet.google.com/edk-rkrk-vaj Speak to you tomorrow! Matthieu -- Matthieu Baerts | R&D Engineer matthieu.baerts(a)tessares.net Tessares SA | Hybrid Access Solutions www.tessares.net 1 Avenue Jean Monnet, 1348 Louvain-la-Neuve, Belgium

1 year

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[PATCH mptcp v4] mptcp: switch sublist to mptcp socket lock protection

by Florian Westphal

The mptcp sublist is currently guarded by rcu, but this comes with several artifacts that make little sense. 1. There is a synchronize_rcu after stealing the subflow list on each mptcp socket close. synchronize_rcu() is a very expensive call, and should not be needed. 2. There is a extra spinlock to guard the list, ey we can't use the lock in some cases because we need to call functions that might sleep. 3. There is a 'mptcp_subflow_hold()' function that uses an 'atomic_inc_not_zero' call. This wasn't needed even with current code: The owning mptcp socket holds references on its subflows, so a subflow socket that is still found on the list will always have a nonzero reference count. This changes the subflow list to always be guarded by the owning mptcp socket lock. This is safe as long as no code path that holds a mptcp subflow tcp socket lock will try to lock the owning mptcp sockets lock. The inverse -- locking the tcp subflow lock while holding the mptcp lock -- is fine. mptcp_subflow_get_ref() will have to be altered later when we support multiple subflows so it will pick a 'preferred' subflow rather than the first one in the list. v4: - remove all sk_state changes added in v2/v3, they do not belong here -- it should be done as a separate change. - prefer mptcp_for_each_subflow rather than list_for_each_entry. v3: use BH locking scheme in mptcp_finish_connect, there is no guarantee we are always called from backlog processing. Signed-off-by: Florian Westphal <fw(a)strlen.de> --- net/mptcp/protocol.c | 161 +++++++++++++++++++------------------------ net/mptcp/protocol.h | 3 +- 2 files changed, 73 insertions(+), 91 deletions(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 9a98c8e0c996..6c92c210aac5 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -25,26 +25,20 @@ static inline bool before64(__u64 seq1, __u64 seq2) #define after64(seq2, seq1) before64(seq1, seq2) -static bool mptcp_subflow_hold(struct subflow_context *subflow) -{ - struct sock *sk = mptcp_subflow_tcp_socket(subflow)->sk; - - return refcount_inc_not_zero(&sk->sk_refcnt); -} - static struct sock *mptcp_subflow_get_ref(const struct mptcp_sock *msk) { struct subflow_context *subflow; - rcu_read_lock(); + sock_owned_by_me((const struct sock *)msk); + mptcp_for_each_subflow(msk, subflow) { - if (mptcp_subflow_hold(subflow)) { - rcu_read_unlock(); - return mptcp_subflow_tcp_socket(subflow)->sk; - } + struct sock *sk; + + sk = mptcp_subflow_tcp_socket(subflow)->sk; + sock_hold(sk); + return sk; } - rcu_read_unlock(); return NULL; } @@ -179,9 +173,12 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) return sock_sendmsg(msk->subflow, msg); } + lock_sock(sk); ssk = mptcp_subflow_get_ref(msk); - if (!ssk) + if (!ssk) { + release_sock(sk); return -ENOTCONN; + } if (!msg_data_left(msg)) { pr_debug("empty send"); @@ -196,7 +193,6 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) goto put_out; } - lock_sock(sk); lock_sock(ssk); timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); while (msg_data_left(msg)) { @@ -214,9 +210,9 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) } release_sock(ssk); - release_sock(sk); put_out: + release_sock(sk); sock_put(ssk); return ret; } @@ -381,14 +377,16 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, return sock_recvmsg(msk->subflow, msg, flags); } + lock_sock(sk); ssk = mptcp_subflow_get_ref(msk); - if (!ssk) + if (!ssk) { + release_sock(sk); return -ENOTCONN; + } subflow = subflow_ctx(ssk); tp = tcp_sk(ssk); - lock_sock(sk); lock_sock(ssk); desc.arg.data = &arg; @@ -566,57 +564,36 @@ static int mptcp_init_sock(struct sock *sk) pr_debug("msk=%p", msk); - INIT_LIST_HEAD_RCU(&msk->conn_list); - spin_lock_init(&msk->conn_list_lock); + INIT_LIST_HEAD(&msk->conn_list); return 0; } -static void mptcp_flush_conn_list(struct sock *sk, struct list_head *list) -{ - struct mptcp_sock *msk = mptcp_sk(sk); - - INIT_LIST_HEAD_RCU(list); - spin_lock_bh(&msk->conn_list_lock); - list_splice_init(&msk->conn_list, list); - spin_unlock_bh(&msk->conn_list_lock); - - if (!list_empty(list)) - synchronize_rcu(); -} - static void mptcp_close(struct sock *sk, long timeout) { struct mptcp_sock *msk = mptcp_sk(sk); struct subflow_context *subflow, *tmp; struct socket *ssk = NULL; - struct list_head list; inet_sk_state_store(sk, TCP_CLOSE); - spin_lock_bh(&msk->conn_list_lock); + lock_sock(sk); + if (msk->subflow) { ssk = msk->subflow; msk->subflow = NULL; } - spin_unlock_bh(&msk->conn_list_lock); + if (ssk != NULL) { pr_debug("subflow=%p", ssk->sk); sock_release(ssk); } - /* this is the only place where we can remove any entry from the - * conn_list. Additionally acquiring the socket lock here - * allows for mutual exclusion with mptcp_shutdown(). - */ - lock_sock(sk); - mptcp_flush_conn_list(sk, &list); - release_sock(sk); - - list_for_each_entry_safe(subflow, tmp, &list, node) { + list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) { pr_debug("conn_list->subflow=%p", subflow); sock_release(mptcp_subflow_tcp_socket(subflow)); } + release_sock(sk); sock_orphan(sk); sock_put(sk); @@ -645,11 +622,14 @@ static struct sock *mptcp_accept(struct sock *sk, int flags, int *err, struct sock *new_mptcp_sock; u64 ack_seq; + lock_sock(sk); + local_bh_disable(); new_mptcp_sock = sk_clone_lock(sk, GFP_ATOMIC); if (!new_mptcp_sock) { *err = -ENOBUFS; local_bh_enable(); + release_sock(sk); kernel_sock_shutdown(new_sock, SHUT_RDWR); sock_release(new_sock); return NULL; @@ -663,10 +643,7 @@ static struct sock *mptcp_accept(struct sock *sk, int flags, int *err, msk->token = subflow->token; pr_debug("token=%u", msk->token); token_update_accept(new_sock->sk, new_mptcp_sock); - spin_lock(&msk->conn_list_lock); - list_add_rcu(&subflow->node, &msk->conn_list); msk->subflow = NULL; - spin_unlock(&msk->conn_list_lock); crypto_key_sha1(msk->remote_key, NULL, &ack_seq); msk->write_seq = subflow->idsn + 1; @@ -678,9 +655,11 @@ static struct sock *mptcp_accept(struct sock *sk, int flags, int *err, subflow->tcp_sock = new_sock; newsk = new_mptcp_sock; subflow->conn = new_mptcp_sock; + list_add(&subflow->node, &msk->conn_list); bh_unlock_sock(new_mptcp_sock); local_bh_enable(); inet_sk_state_store(newsk, TCP_ESTABLISHED); + release_sock(sk); } else { newsk = new_sock->sk; tcp_sk(newsk)->is_mptcp = 0; @@ -765,14 +744,33 @@ void mptcp_finish_connect(struct sock *sk, int mp_capable) if (mp_capable) { u64 ack_seq; + /* sk (new subflow socket) is already locked, but we need + * to lock the parent (mptcp) socket now to add the tcp socket + * to the subflow list. + * + * From lockdep point of view, this creates an ABBA type + * deadlock: Normally (sendmsg, recvmsg, ..), we lock the mptcp + * socket, then acquire a subflow lock. + * Here we do the reverse: "subflow lock, then mptcp lock". + * + * Its alright to do this here, because this subflow is not yet + * on the mptcp sockets subflow list. + * + * IOW, if another CPU has this mptcp socket locked, it cannot + * acquire this particular subflow, because subflow->sk isn't + * on msk->conn_list. + * + * This function can be called either from backlog processing + * (BH will be enabled) or from softirq, so we need to use BH + * locking scheme. + */ + local_bh_disable(); + bh_lock_sock_nested(sk); + msk->remote_key = subflow->remote_key; msk->local_key = subflow->local_key; msk->token = subflow->token; pr_debug("token=%u", msk->token); - spin_lock_bh(&msk->conn_list_lock); - list_add_rcu(&subflow->node, &msk->conn_list); - msk->subflow = NULL; - spin_unlock_bh(&msk->conn_list_lock); crypto_key_sha1(msk->remote_key, NULL, &ack_seq); msk->write_seq = subflow->idsn + 1; @@ -781,6 +779,11 @@ void mptcp_finish_connect(struct sock *sk, int mp_capable) subflow->map_seq = ack_seq; subflow->map_subflow_seq = 1; subflow->rel_write_seq = 1; + + list_add(&subflow->node, &msk->conn_list); + msk->subflow = NULL; + bh_unlock_sock(sk); + local_bh_enable(); } inet_sk_state_store(sk, TCP_ESTABLISHED); } @@ -899,11 +902,15 @@ static int mptcp_getname(struct socket *sock, struct sockaddr *uaddr, * is connected and there are multiple subflows is not defined. * For now just use the first subflow on the list. */ + lock_sock(sock->sk); ssk = mptcp_subflow_get_ref(msk); - if (!ssk) + if (!ssk) { + release_sock(sock->sk); return -ENOTCONN; + } ret = inet_getname(ssk->sk_socket, uaddr, peer); + release_sock(sock->sk); sock_put(ssk); return ret; } @@ -939,43 +946,23 @@ static int mptcp_stream_accept(struct socket *sock, struct socket *newsock, static __poll_t mptcp_poll(struct file *file, struct socket *sock, struct poll_table_struct *wait) { - struct subflow_context *subflow, *tmp; + struct subflow_context *subflow; const struct mptcp_sock *msk; struct sock *sk = sock->sk; __poll_t ret = 0; - unsigned int i; msk = mptcp_sk(sk); if (msk->subflow) return tcp_poll(file, msk->subflow, wait); - i = 0; - for (;;) { - int j = 0; - tmp = NULL; - - rcu_read_lock(); - mptcp_for_each_subflow(msk, subflow) { - if (j < i) { - j++; - continue; - } - - if (!mptcp_subflow_hold(subflow)) - continue; - - tmp = subflow; - i++; - break; - } - rcu_read_unlock(); - - if (!tmp) - break; + lock_sock(sk); + mptcp_for_each_subflow(msk, subflow) { + struct socket *tcp_sock; - ret |= tcp_poll(file, mptcp_subflow_tcp_socket(tmp), wait); - sock_put(mptcp_subflow_tcp_socket(tmp)->sk); + tcp_sock = mptcp_subflow_tcp_socket(subflow); + ret |= tcp_poll(file, tcp_sock, wait); } + release_sock(sk); return ret; } @@ -994,24 +981,20 @@ static int mptcp_shutdown(struct socket *sock, int how) } /* protect against concurrent mptcp_close(), so that nobody can - * remove entries from the conn list and walking the list breaking - * the RCU critical section is still safe. We need to release the - * RCU lock to call the blocking kernel_sock_shutdown() primitive - * Note: we can't use MPTCP socket lock to protect conn_list changes, + * remove entries from the conn list and walking the list + * is still safe. + * + * We can't use MPTCP socket lock to protect conn_list changes, * as we need to update it from the BH via the mptcp_finish_connect() */ lock_sock(sock->sk); - rcu_read_lock(); - list_for_each_entry_rcu(subflow, &msk->conn_list, node) { + mptcp_for_each_subflow(msk, subflow) { struct socket *tcp_socket; tcp_socket = mptcp_subflow_tcp_socket(subflow); - rcu_read_unlock(); pr_debug("conn_list->subflow=%p", subflow); ret = kernel_sock_shutdown(tcp_socket, how); - rcu_read_lock(); } - rcu_read_unlock(); release_sock(sock->sk); return ret; diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 6cfce8499656..d4b2aeb4c70f 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -36,13 +36,12 @@ struct mptcp_sock { u64 write_seq; atomic64_t ack_seq; u32 token; - spinlock_t conn_list_lock; struct list_head conn_list; struct socket *subflow; /* outgoing connect/listener/!mp_capable */ }; #define mptcp_for_each_subflow(__msk, __subflow) \ - list_for_each_entry_rcu(__subflow, &((__msk)->conn_list), node) + list_for_each_entry(__subflow, &((__msk)->conn_list), node) static inline struct mptcp_sock *mptcp_sk(const struct sock *sk) { -- 2.21.0

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Change in ...mptcp_net-next[scripts]: ci:virtme: turn on KASAN and PROVE_LOCKING

by Matthieu Baerts (GerritHub)

Hello Mat Martineau, I'd like you to do a code review. Please visit https://review.gerrithub.io/c/multipath-tcp/mptcp_net-next/+/456219 to review the following change. Change subject: ci:virtme: turn on KASAN and PROVE_LOCKING ...................................................................... ci:virtme: turn on KASAN and PROVE_LOCKING To debug memory and locking issues. There is a tradeoff in speed, but it could alert us to problems the selftests alone don't catch. Suggested-by: Mat Martineau <mathew.j.martineau(a)linux.intel.com> Signed-off-by: Matthieu Baerts <matthieu.baerts(a)tessares.net> Change-Id: I54868cc70c8ab994fea5f6926866913c133b108d --- M ci/virtme.sh 1 file changed, 12 insertions(+), 5 deletions(-) git pull ssh://review.gerrithub.io:29418/multipath-tcp/mptcp_net-next refs/changes/19/456219/1 -- To view, visit https://review.gerrithub.io/c/multipath-tcp/mptcp_net-next/+/456219 To unsubscribe, or for help writing mail filters, visit https://review.gerrithub.io/settings Gerrit-Project: multipath-tcp/mptcp_net-next Gerrit-Branch: scripts Gerrit-Change-Id: I54868cc70c8ab994fea5f6926866913c133b108d Gerrit-Change-Number: 456219 Gerrit-PatchSet: 1 Gerrit-Owner: Matthieu Baerts <matthieu.baerts(a)tessares.net> Gerrit-Reviewer: Mat Martineau <mathew.j.martineau(a)linux.intel.com> Gerrit-MessageType: newchange

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mptcp May 2019