* [PATCH net-next 1/4] mptcp: do not set unconditionally csum_reqd on incoming opt
@ 2021-08-18 10:35 Paolo Abeni
2021-08-18 10:35 ` [PATCH net-next 2/4] mptcp: better binary layout for mptcp_options_received Paolo Abeni
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Paolo Abeni @ 2021-08-18 10:35 UTC (permalink / raw)
To: mptcp
Should be set only if the ingress packets present it, otherwise
we can confuse csum validation.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/mptcp/options.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index d94ff50c29b3..b3d5547fdb61 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -355,8 +355,6 @@ void mptcp_get_options(const struct sock *sk,
const struct sk_buff *skb,
struct mptcp_options_received *mp_opt)
{
- struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
- struct mptcp_sock *msk = mptcp_sk(subflow->conn);
const struct tcphdr *th = tcp_hdr(skb);
const unsigned char *ptr;
int length;
@@ -372,7 +370,7 @@ void mptcp_get_options(const struct sock *sk,
mp_opt->dss = 0;
mp_opt->mp_prio = 0;
mp_opt->reset = 0;
- mp_opt->csum_reqd = READ_ONCE(msk->csum_enabled);
+ mp_opt->csum_reqd = 0;
mp_opt->deny_join_id0 = 0;
mp_opt->mp_fail = 0;
--
2.26.3
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH net-next 2/4] mptcp: better binary layout for mptcp_options_received 2021-08-18 10:35 [PATCH net-next 1/4] mptcp: do not set unconditionally csum_reqd on incoming opt Paolo Abeni @ 2021-08-18 10:35 ` Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 4/4] mptcp: optimize the input options processing Paolo Abeni 2 siblings, 0 replies; 5+ messages in thread From: Paolo Abeni @ 2021-08-18 10:35 UTC (permalink / raw) To: mptcp This change reorder the mptcp_options_received fields to shrink the structure a bit and to ensure the most frequently used fields are all in the first cacheline. Sub-opt specific flags are are moved out of the suboptions area, and we must now explicitly set them when the relevant suboption is parsed. This latter part will simplfy the next patch. Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- net/mptcp/options.c | 13 ++++--------- net/mptcp/protocol.h | 24 ++++++++++++------------ 2 files changed, 16 insertions(+), 21 deletions(-) diff --git a/net/mptcp/options.c b/net/mptcp/options.c index b3d5547fdb61..500137f93c28 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -80,11 +80,8 @@ static void mptcp_parse_option(const struct sk_buff *skb, * In other words, the only way for checksums not to be used * is if both hosts in their SYNs set A=0." */ - if (flags & MPTCP_CAP_CHECKSUM_REQD) - mp_opt->csum_reqd = 1; - - if (flags & MPTCP_CAP_DENY_JOIN_ID0) - mp_opt->deny_join_id0 = 1; + mp_opt->csum_reqd = !!(flags & MPTCP_CAP_CHECKSUM_REQD); + mp_opt->deny_join_id0 = !!(flags & MPTCP_CAP_DENY_JOIN_ID0); mp_opt->mp_capable = 1; if (opsize >= TCPOLEN_MPTCP_MPC_SYNACK) { @@ -262,6 +259,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, mp_opt->add_addr = 1; mp_opt->addr.id = *ptr++; + mp_opt->addr.port = 0; if (mp_opt->addr.family == AF_INET) { memcpy((u8 *)&mp_opt->addr.addr.s_addr, (u8 *)ptr, 4); ptr += 4; @@ -282,6 +280,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, } } #endif + mp_opt->ahmac = 0; if (!mp_opt->echo) { mp_opt->ahmac = get_unaligned_be64(ptr); ptr += 8; @@ -363,15 +362,11 @@ void mptcp_get_options(const struct sock *sk, mp_opt->mp_capable = 0; mp_opt->mp_join = 0; mp_opt->add_addr = 0; - mp_opt->ahmac = 0; mp_opt->fastclose = 0; - mp_opt->addr.port = 0; mp_opt->rm_addr = 0; mp_opt->dss = 0; mp_opt->mp_prio = 0; mp_opt->reset = 0; - mp_opt->csum_reqd = 0; - mp_opt->deny_join_id0 = 0; mp_opt->mp_fail = 0; length = (th->doff * 4) - sizeof(struct tcphdr); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 57a50b1194a9..624a72e7ea17 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -140,28 +140,28 @@ struct mptcp_options_received { add_addr : 1, rm_addr : 1, mp_prio : 1, - mp_fail : 1, - echo : 1, - csum_reqd : 1, - backup : 1, - deny_join_id0 : 1; + mp_fail : 1; u32 token; u32 nonce; - u64 thmac; - u8 hmac[MPTCPOPT_HMAC_LEN]; - u8 join_id; - u8 use_map:1, + u16 use_map:1, dsn64:1, data_fin:1, use_ack:1, ack64:1, mpc_map:1, - __unused:2; + reset_reason:4, + reset_transient:1, + echo:1, + csum_reqd:1, + backup:1, + deny_join_id0:1, + __unused:1; + u8 join_id; + u64 thmac; + u8 hmac[MPTCPOPT_HMAC_LEN]; struct mptcp_addr_info addr; struct mptcp_rm_list rm_list; u64 ahmac; - u8 reset_reason:4; - u8 reset_transient:1; u64 fail_seq; }; -- 2.26.3 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask 2021-08-18 10:35 [PATCH net-next 1/4] mptcp: do not set unconditionally csum_reqd on incoming opt Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 2/4] mptcp: better binary layout for mptcp_options_received Paolo Abeni @ 2021-08-18 10:35 ` Paolo Abeni 2021-08-19 1:10 ` Mat Martineau 2021-08-18 10:35 ` [PATCH net-next 4/4] mptcp: optimize the input options processing Paolo Abeni 2 siblings, 1 reply; 5+ messages in thread From: Paolo Abeni @ 2021-08-18 10:35 UTC (permalink / raw) To: mptcp This makes input options processing more consistent with output ones and will simplify the next patch. Also avoid clearing the suboption field after processing it, since it's not needed. Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- net/mptcp/options.c | 79 +++++++++++++++++++------------------------- net/mptcp/protocol.c | 4 +-- net/mptcp/protocol.h | 20 +++++------ net/mptcp/subflow.c | 43 ++++++++++++++---------- 4 files changed, 70 insertions(+), 76 deletions(-) diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 500137f93c28..18ad028ed589 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -80,10 +80,12 @@ static void mptcp_parse_option(const struct sk_buff *skb, * In other words, the only way for checksums not to be used * is if both hosts in their SYNs set A=0." */ - mp_opt->csum_reqd = !!(flags & MPTCP_CAP_CHECKSUM_REQD); - mp_opt->deny_join_id0 = !!(flags & MPTCP_CAP_DENY_JOIN_ID0); + if (flags & MPTCP_CAP_CHECKSUM_REQD) + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; + if (flags & MPTCP_CAP_DENY_JOIN_ID0) + mp_opt->suboptions |= OPTION_MPTCP_DENYID0; - mp_opt->mp_capable = 1; + mp_opt->suboptions |= OPTIONS_MPTCP_MPC; if (opsize >= TCPOLEN_MPTCP_MPC_SYNACK) { mp_opt->sndr_key = get_unaligned_be64(ptr); ptr += 8; @@ -98,7 +100,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, * equivalent to those in a DSS option and can be used * interchangeably." */ - mp_opt->dss = 1; + mp_opt->suboptions |= OPTION_MPTCP_DSS; mp_opt->use_map = 1; mp_opt->mpc_map = 1; mp_opt->data_len = get_unaligned_be16(ptr); @@ -106,7 +108,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, } if (opsize == TCPOLEN_MPTCP_MPC_ACK_DATA_CSUM) { mp_opt->csum = (__force __sum16)get_unaligned_be16(ptr); - mp_opt->csum_reqd = 1; + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; ptr += 2; } pr_debug("MP_CAPABLE version=%x, flags=%x, optlen=%d sndr=%llu, rcvr=%llu len=%d csum=%u", @@ -115,7 +117,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, break; case MPTCPOPT_MP_JOIN: - mp_opt->mp_join = 1; + mp_opt->suboptions |= OPTIONS_MPTCP_MPJ; if (opsize == TCPOLEN_MPTCP_MPJ_SYN) { mp_opt->backup = *ptr++ & MPTCPOPT_BACKUP; mp_opt->join_id = *ptr++; @@ -141,7 +143,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, memcpy(mp_opt->hmac, ptr, MPTCPOPT_HMAC_LEN); pr_debug("MP_JOIN hmac"); } else { - mp_opt->mp_join = 0; + mp_opt->suboptions &= ~OPTIONS_MPTCP_MPJ; } break; @@ -189,8 +191,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, opsize != expected_opsize + TCPOLEN_MPTCP_DSS_CHECKSUM) break; - mp_opt->dss = 1; - + mp_opt->suboptions |= OPTION_MPTCP_DSS; if (mp_opt->use_ack) { if (mp_opt->ack64) { mp_opt->data_ack = get_unaligned_be64(ptr); @@ -219,14 +220,15 @@ static void mptcp_parse_option(const struct sk_buff *skb, ptr += 2; if (opsize == expected_opsize + TCPOLEN_MPTCP_DSS_CHECKSUM) { - mp_opt->csum_reqd = 1; + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; mp_opt->csum = (__force __sum16)get_unaligned_be16(ptr); ptr += 2; } pr_debug("data_seq=%llu subflow_seq=%u data_len=%u csum=%d:%u", mp_opt->data_seq, mp_opt->subflow_seq, - mp_opt->data_len, mp_opt->csum_reqd, mp_opt->csum); + mp_opt->data_len, !!(mp_opt->suboptions & OPTION_MPTCP_CSUMREQD), + mp_opt->csum); } break; @@ -257,7 +259,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, break; } - mp_opt->add_addr = 1; + mp_opt->suboptions = OPTION_MPTCP_ADD_ADDR; mp_opt->addr.id = *ptr++; mp_opt->addr.port = 0; if (mp_opt->addr.family == AF_INET) { @@ -297,7 +299,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, ptr++; - mp_opt->rm_addr = 1; + mp_opt->suboptions |= OPTION_MPTCP_RM_ADDR; mp_opt->rm_list.nr = opsize - TCPOLEN_MPTCP_RM_ADDR_BASE; for (i = 0; i < mp_opt->rm_list.nr; i++) mp_opt->rm_list.ids[i] = *ptr++; @@ -308,7 +310,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, if (opsize != TCPOLEN_MPTCP_PRIO) break; - mp_opt->mp_prio = 1; + mp_opt->suboptions |= OPTION_MPTCP_PRIO; mp_opt->backup = *ptr++ & MPTCP_PRIO_BKUP; pr_debug("MP_PRIO: prio=%d", mp_opt->backup); break; @@ -320,7 +322,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, ptr += 2; mp_opt->rcvr_key = get_unaligned_be64(ptr); ptr += 8; - mp_opt->fastclose = 1; + mp_opt->suboptions |= OPTION_MPTCP_FASTCLOSE; break; case MPTCPOPT_RST: @@ -329,7 +331,8 @@ static void mptcp_parse_option(const struct sk_buff *skb, if (!(TCP_SKB_CB(skb)->tcp_flags & TCPHDR_RST)) break; - mp_opt->reset = 1; + + mp_opt->suboptions |= OPTION_MPTCP_RST; flags = *ptr++; mp_opt->reset_transient = flags & MPTCP_RST_TRANSIENT; mp_opt->reset_reason = *ptr; @@ -340,7 +343,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, break; ptr += 2; - mp_opt->mp_fail = 1; + mp_opt->suboptions |= OPTION_MPTCP_FAIL; mp_opt->fail_seq = get_unaligned_be64(ptr); pr_debug("MP_FAIL: data_seq=%llu", mp_opt->fail_seq); break; @@ -359,15 +362,7 @@ void mptcp_get_options(const struct sock *sk, int length; /* initialize option status */ - mp_opt->mp_capable = 0; - mp_opt->mp_join = 0; - mp_opt->add_addr = 0; - mp_opt->fastclose = 0; - mp_opt->rm_addr = 0; - mp_opt->dss = 0; - mp_opt->mp_prio = 0; - mp_opt->reset = 0; - mp_opt->mp_fail = 0; + mp_opt->suboptions = 0; length = (th->doff * 4) - sizeof(struct tcphdr); ptr = (const unsigned char *)(th + 1); @@ -921,7 +916,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, */ if (TCP_SKB_CB(skb)->seq == subflow->ssn_offset + 1 && TCP_SKB_CB(skb)->end_seq == TCP_SKB_CB(skb)->seq && - subflow->mp_join && mp_opt->mp_join && + subflow->mp_join && (mp_opt->suboptions & OPTIONS_MPTCP_MPJ) && READ_ONCE(msk->pm.server_side)) tcp_send_ack(ssk); goto fully_established; @@ -938,7 +933,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, return subflow->mp_capable; } - if (mp_opt->dss && mp_opt->use_ack) { + if ((mp_opt->suboptions & OPTION_MPTCP_DSS) && mp_opt->use_ack) { /* subflows are fully established as soon as we get any * additional ack. */ @@ -947,7 +942,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, goto fully_established; } - if (mp_opt->add_addr) { + if (mp_opt->suboptions & OPTION_MPTCP_ADD_ADDR) { WRITE_ONCE(msk->fully_established, true); return true; } @@ -956,7 +951,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, * then fallback to TCP. Fallback scenarios requires a reset for * MP_JOIN subflows. */ - if (!mp_opt->mp_capable) { + if (!(mp_opt->suboptions & OPTIONS_MPTCP_MPC)) { if (subflow->mp_join) goto reset; subflow->mp_capable = 0; @@ -965,7 +960,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, return false; } - if (mp_opt->deny_join_id0) + if (mp_opt->suboptions & OPTION_MPTCP_DENYID0) WRITE_ONCE(msk->pm.remote_deny_join_id0, true); if (unlikely(!READ_ONCE(msk->pm.server_side))) @@ -1120,13 +1115,13 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) if (!check_fully_established(msk, sk, subflow, skb, &mp_opt)) return sk->sk_state != TCP_CLOSE; - if (mp_opt.fastclose && + if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) && msk->local_key == mp_opt.rcvr_key) { WRITE_ONCE(msk->rcv_fastclose, true); mptcp_schedule_work((struct sock *)msk); } - if (mp_opt.add_addr && add_addr_hmac_valid(msk, &mp_opt)) { + if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) && add_addr_hmac_valid(msk, &mp_opt)) { if (!mp_opt.echo) { mptcp_pm_add_addr_received(msk, &mp_opt.addr); MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR); @@ -1138,34 +1133,28 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) if (mp_opt.addr.port) MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD); - - mp_opt.add_addr = 0; } - if (mp_opt.rm_addr) { + if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR) mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list); - mp_opt.rm_addr = 0; - } - if (mp_opt.mp_prio) { + if (mp_opt.suboptions & OPTION_MPTCP_PRIO) { mptcp_pm_mp_prio_received(sk, mp_opt.backup); MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX); - mp_opt.mp_prio = 0; } - if (mp_opt.mp_fail) { + if (mp_opt.suboptions & OPTION_MPTCP_FAIL) { mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq); MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX); - mp_opt.mp_fail = 0; } - if (mp_opt.reset) { + if (mp_opt.suboptions & OPTION_MPTCP_RST) { subflow->reset_seen = 1; subflow->reset_reason = mp_opt.reset_reason; subflow->reset_transient = mp_opt.reset_transient; } - if (!mp_opt.dss) + if (!(mp_opt.suboptions & OPTION_MPTCP_DSS)) return true; /* we can't wait for recvmsg() to update the ack_seq, otherwise @@ -1214,7 +1203,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) } mpext->data_len = mp_opt.data_len; mpext->use_map = 1; - mpext->csum_reqd = mp_opt.csum_reqd; + mpext->csum_reqd = !!(mp_opt.suboptions & OPTION_MPTCP_CSUMREQD); if (mpext->csum_reqd) mpext->csum = mp_opt.csum; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 8eb2626503d7..b5f8ad634571 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2836,7 +2836,7 @@ struct sock *mptcp_sk_clone(const struct sock *sk, msk->token = subflow_req->token; msk->subflow = NULL; WRITE_ONCE(msk->fully_established, false); - if (mp_opt->csum_reqd) + if (mp_opt->suboptions & OPTION_MPTCP_CSUMREQD) WRITE_ONCE(msk->csum_enabled, true); msk->write_seq = subflow_req->idsn + 1; @@ -2845,7 +2845,7 @@ struct sock *mptcp_sk_clone(const struct sock *sk, msk->wnd_end = msk->snd_nxt + req->rsk_rcv_wnd; msk->setsockopt_seq = mptcp_sk(sk)->setsockopt_seq; - if (mp_opt->mp_capable) { + if (mp_opt->suboptions & OPTIONS_MPTCP_MPC) { msk->can_ack = true; msk->remote_key = mp_opt->sndr_key; mptcp_crypto_key_sha(msk->remote_key, NULL, &ack_seq); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 624a72e7ea17..9934bea21cb9 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -29,6 +29,14 @@ #define OPTION_MPTCP_DSS BIT(11) #define OPTION_MPTCP_FAIL BIT(12) +#define OPTION_MPTCP_CSUMREQD BIT(13) +#define OPTION_MPTCP_DENYID0 BIT(14) + +#define OPTIONS_MPTCP_MPC (OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_SYNACK | \ + OPTION_MPTCP_MPC_ACK) +#define OPTIONS_MPTCP_MPJ (OPTION_MPTCP_MPJ_SYN | OPTION_MPTCP_MPJ_SYNACK | \ + OPTION_MPTCP_MPJ_SYNACK) + /* MPTCP option subtypes */ #define MPTCPOPT_MP_CAPABLE 0 #define MPTCPOPT_MP_JOIN 1 @@ -132,15 +140,7 @@ struct mptcp_options_received { u32 subflow_seq; u16 data_len; __sum16 csum; - u16 mp_capable : 1, - mp_join : 1, - fastclose : 1, - reset : 1, - dss : 1, - add_addr : 1, - rm_addr : 1, - mp_prio : 1, - mp_fail : 1; + u16 suboptions; u32 token; u32 nonce; u16 use_map:1, @@ -152,9 +152,7 @@ struct mptcp_options_received { reset_reason:4, reset_transient:1, echo:1, - csum_reqd:1, backup:1, - deny_join_id0:1, __unused:1; u8 join_id; u64 thmac; diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 54b7ffc21861..670bed9fcf2e 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -141,6 +141,7 @@ static int subflow_check_req(struct request_sock *req, struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); struct mptcp_options_received mp_opt; + bool opt_mp_capable, opt_mp_join; pr_debug("subflow_req=%p, listener=%p", subflow_req, listener); @@ -154,16 +155,18 @@ static int subflow_check_req(struct request_sock *req, mptcp_get_options(sk_listener, skb, &mp_opt); - if (mp_opt.mp_capable) { + opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC); + opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); + if (opt_mp_capable) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE); - if (mp_opt.mp_join) + if (opt_mp_join) return 0; - } else if (mp_opt.mp_join) { + } else if (opt_mp_join) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINSYNRX); } - if (mp_opt.mp_capable && listener->request_mptcp) { + if (opt_mp_capable && listener->request_mptcp) { int err, retries = MPTCP_TOKEN_MAX_RETRIES; subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq; @@ -194,7 +197,7 @@ static int subflow_check_req(struct request_sock *req, else SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_TOKENFALLBACKINIT); - } else if (mp_opt.mp_join && listener->request_mptcp) { + } else if (opt_mp_join && listener->request_mptcp) { subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq; subflow_req->mp_join = 1; subflow_req->backup = mp_opt.backup; @@ -243,15 +246,18 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req, struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); struct mptcp_options_received mp_opt; + bool opt_mp_capable, opt_mp_join; int err; subflow_init_req(req, sk_listener); mptcp_get_options(sk_listener, skb, &mp_opt); - if (mp_opt.mp_capable && mp_opt.mp_join) + opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC); + opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); + if (opt_mp_capable && opt_mp_join) return -EINVAL; - if (mp_opt.mp_capable && listener->request_mptcp) { + if (opt_mp_capable && listener->request_mptcp) { if (mp_opt.sndr_key == 0) return -EINVAL; @@ -262,7 +268,7 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req, subflow_req->mp_capable = 1; subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq - 1; - } else if (mp_opt.mp_join && listener->request_mptcp) { + } else if (opt_mp_join && listener->request_mptcp) { if (!mptcp_token_join_cookie_init_state(subflow_req, skb)) return -EINVAL; @@ -394,7 +400,6 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) subflow->icsk_af_ops->sk_rx_dst_set(sk, skb); - /* be sure no special action on any packet other than syn-ack */ if (subflow->conn_finished) return; @@ -407,7 +412,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) mptcp_get_options(sk, skb, &mp_opt); if (subflow->request_mptcp) { - if (!mp_opt.mp_capable) { + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) { MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPCAPABLEACTIVEFALLBACK); mptcp_do_fallback(sk); @@ -415,9 +420,9 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) goto fallback; } - if (mp_opt.csum_reqd) + if (mp_opt.suboptions & OPTION_MPTCP_CSUMREQD) WRITE_ONCE(mptcp_sk(parent)->csum_enabled, true); - if (mp_opt.deny_join_id0) + if (mp_opt.suboptions & OPTION_MPTCP_DENYID0) WRITE_ONCE(mptcp_sk(parent)->pm.remote_deny_join_id0, true); subflow->mp_capable = 1; subflow->can_ack = 1; @@ -430,7 +435,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) } else if (subflow->request_join) { u8 hmac[SHA256_DIGEST_SIZE]; - if (!mp_opt.mp_join) { + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ)) { subflow->reset_reason = MPTCP_RST_EMPTCP; goto do_reset; } @@ -636,10 +641,10 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, pr_debug("listener=%p, req=%p, conn=%p", listener, req, listener->conn); - /* After child creation we must look for 'mp_capable' even when options + /* After child creation we must look for MPC even when options * are not parsed */ - mp_opt.mp_capable = 0; + mp_opt.suboptions = 0; /* hopefully temporary handling for MP_JOIN+syncookie */ subflow_req = mptcp_subflow_rsk(req); @@ -659,7 +664,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, * options. */ mptcp_get_options(sk, skb, &mp_opt); - if (!mp_opt.mp_capable) { + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) { fallback = true; goto create_child; } @@ -668,8 +673,10 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, if (!new_msk) fallback = true; } else if (subflow_req->mp_join) { + bool opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); + mptcp_get_options(sk, skb, &mp_opt); - if (!mp_opt.mp_join || !subflow_hmac_valid(req, &mp_opt) || + if (!opt_mp_join || !subflow_hmac_valid(req, &mp_opt) || !mptcp_can_accept_new_subflow(subflow_req->msk)) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINACKMAC); fallback = true; @@ -726,7 +733,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, /* with OoO packets we can reach here without ingress * mpc option */ - if (mp_opt.mp_capable) + if (mp_opt.suboptions & OPTIONS_MPTCP_MPC) mptcp_subflow_fully_established(ctx, &mp_opt); } else if (ctx->mp_join) { struct mptcp_sock *owner; -- 2.26.3 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask 2021-08-18 10:35 ` [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask Paolo Abeni @ 2021-08-19 1:10 ` Mat Martineau 0 siblings, 0 replies; 5+ messages in thread From: Mat Martineau @ 2021-08-19 1:10 UTC (permalink / raw) To: Paolo Abeni; +Cc: mptcp On Wed, 18 Aug 2021, Paolo Abeni wrote: > This makes input options processing more consistent with > output ones and will simplify the next patch. > > Also avoid clearing the suboption field after processing > it, since it's not needed. > > Signed-off-by: Paolo Abeni <pabeni@redhat.com> > --- > net/mptcp/options.c | 79 +++++++++++++++++++------------------------- > net/mptcp/protocol.c | 4 +-- > net/mptcp/protocol.h | 20 +++++------ > net/mptcp/subflow.c | 43 ++++++++++++++---------- > 4 files changed, 70 insertions(+), 76 deletions(-) > > diff --git a/net/mptcp/options.c b/net/mptcp/options.c > index 500137f93c28..18ad028ed589 100644 > --- a/net/mptcp/options.c > +++ b/net/mptcp/options.c > @@ -80,10 +80,12 @@ static void mptcp_parse_option(const struct sk_buff *skb, > * In other words, the only way for checksums not to be used > * is if both hosts in their SYNs set A=0." > */ > - mp_opt->csum_reqd = !!(flags & MPTCP_CAP_CHECKSUM_REQD); > - mp_opt->deny_join_id0 = !!(flags & MPTCP_CAP_DENY_JOIN_ID0); > + if (flags & MPTCP_CAP_CHECKSUM_REQD) > + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; > + if (flags & MPTCP_CAP_DENY_JOIN_ID0) > + mp_opt->suboptions |= OPTION_MPTCP_DENYID0; > > - mp_opt->mp_capable = 1; > + mp_opt->suboptions |= OPTIONS_MPTCP_MPC; > if (opsize >= TCPOLEN_MPTCP_MPC_SYNACK) { > mp_opt->sndr_key = get_unaligned_be64(ptr); > ptr += 8; > @@ -98,7 +100,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > * equivalent to those in a DSS option and can be used > * interchangeably." > */ > - mp_opt->dss = 1; > + mp_opt->suboptions |= OPTION_MPTCP_DSS; > mp_opt->use_map = 1; > mp_opt->mpc_map = 1; > mp_opt->data_len = get_unaligned_be16(ptr); > @@ -106,7 +108,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > } > if (opsize == TCPOLEN_MPTCP_MPC_ACK_DATA_CSUM) { > mp_opt->csum = (__force __sum16)get_unaligned_be16(ptr); > - mp_opt->csum_reqd = 1; > + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; > ptr += 2; > } > pr_debug("MP_CAPABLE version=%x, flags=%x, optlen=%d sndr=%llu, rcvr=%llu len=%d csum=%u", > @@ -115,7 +117,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > break; > > case MPTCPOPT_MP_JOIN: > - mp_opt->mp_join = 1; > + mp_opt->suboptions |= OPTIONS_MPTCP_MPJ; > if (opsize == TCPOLEN_MPTCP_MPJ_SYN) { > mp_opt->backup = *ptr++ & MPTCPOPT_BACKUP; > mp_opt->join_id = *ptr++; > @@ -141,7 +143,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > memcpy(mp_opt->hmac, ptr, MPTCPOPT_HMAC_LEN); > pr_debug("MP_JOIN hmac"); > } else { > - mp_opt->mp_join = 0; > + mp_opt->suboptions &= ~OPTIONS_MPTCP_MPJ; > } > break; > > @@ -189,8 +191,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > opsize != expected_opsize + TCPOLEN_MPTCP_DSS_CHECKSUM) > break; > > - mp_opt->dss = 1; > - > + mp_opt->suboptions |= OPTION_MPTCP_DSS; > if (mp_opt->use_ack) { > if (mp_opt->ack64) { > mp_opt->data_ack = get_unaligned_be64(ptr); > @@ -219,14 +220,15 @@ static void mptcp_parse_option(const struct sk_buff *skb, > ptr += 2; > > if (opsize == expected_opsize + TCPOLEN_MPTCP_DSS_CHECKSUM) { > - mp_opt->csum_reqd = 1; > + mp_opt->suboptions |= OPTION_MPTCP_CSUMREQD; > mp_opt->csum = (__force __sum16)get_unaligned_be16(ptr); > ptr += 2; > } > > pr_debug("data_seq=%llu subflow_seq=%u data_len=%u csum=%d:%u", > mp_opt->data_seq, mp_opt->subflow_seq, > - mp_opt->data_len, mp_opt->csum_reqd, mp_opt->csum); > + mp_opt->data_len, !!(mp_opt->suboptions & OPTION_MPTCP_CSUMREQD), > + mp_opt->csum); > } > > break; > @@ -257,7 +259,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > break; > } > > - mp_opt->add_addr = 1; > + mp_opt->suboptions = OPTION_MPTCP_ADD_ADDR; The above "=" instead of "|=" is the only issue I noticed (the perils of manual bitfields!). Still running the tests to double check, but this seems like a good way to skip a lot of unnecessary branches. Mat > mp_opt->addr.id = *ptr++; > mp_opt->addr.port = 0; > if (mp_opt->addr.family == AF_INET) { > @@ -297,7 +299,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > > ptr++; > > - mp_opt->rm_addr = 1; > + mp_opt->suboptions |= OPTION_MPTCP_RM_ADDR; > mp_opt->rm_list.nr = opsize - TCPOLEN_MPTCP_RM_ADDR_BASE; > for (i = 0; i < mp_opt->rm_list.nr; i++) > mp_opt->rm_list.ids[i] = *ptr++; > @@ -308,7 +310,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > if (opsize != TCPOLEN_MPTCP_PRIO) > break; > > - mp_opt->mp_prio = 1; > + mp_opt->suboptions |= OPTION_MPTCP_PRIO; > mp_opt->backup = *ptr++ & MPTCP_PRIO_BKUP; > pr_debug("MP_PRIO: prio=%d", mp_opt->backup); > break; > @@ -320,7 +322,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > ptr += 2; > mp_opt->rcvr_key = get_unaligned_be64(ptr); > ptr += 8; > - mp_opt->fastclose = 1; > + mp_opt->suboptions |= OPTION_MPTCP_FASTCLOSE; > break; > > case MPTCPOPT_RST: > @@ -329,7 +331,8 @@ static void mptcp_parse_option(const struct sk_buff *skb, > > if (!(TCP_SKB_CB(skb)->tcp_flags & TCPHDR_RST)) > break; > - mp_opt->reset = 1; > + > + mp_opt->suboptions |= OPTION_MPTCP_RST; > flags = *ptr++; > mp_opt->reset_transient = flags & MPTCP_RST_TRANSIENT; > mp_opt->reset_reason = *ptr; > @@ -340,7 +343,7 @@ static void mptcp_parse_option(const struct sk_buff *skb, > break; > > ptr += 2; > - mp_opt->mp_fail = 1; > + mp_opt->suboptions |= OPTION_MPTCP_FAIL; > mp_opt->fail_seq = get_unaligned_be64(ptr); > pr_debug("MP_FAIL: data_seq=%llu", mp_opt->fail_seq); > break; > @@ -359,15 +362,7 @@ void mptcp_get_options(const struct sock *sk, > int length; > > /* initialize option status */ > - mp_opt->mp_capable = 0; > - mp_opt->mp_join = 0; > - mp_opt->add_addr = 0; > - mp_opt->fastclose = 0; > - mp_opt->rm_addr = 0; > - mp_opt->dss = 0; > - mp_opt->mp_prio = 0; > - mp_opt->reset = 0; > - mp_opt->mp_fail = 0; > + mp_opt->suboptions = 0; > > length = (th->doff * 4) - sizeof(struct tcphdr); > ptr = (const unsigned char *)(th + 1); > @@ -921,7 +916,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, > */ > if (TCP_SKB_CB(skb)->seq == subflow->ssn_offset + 1 && > TCP_SKB_CB(skb)->end_seq == TCP_SKB_CB(skb)->seq && > - subflow->mp_join && mp_opt->mp_join && > + subflow->mp_join && (mp_opt->suboptions & OPTIONS_MPTCP_MPJ) && > READ_ONCE(msk->pm.server_side)) > tcp_send_ack(ssk); > goto fully_established; > @@ -938,7 +933,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, > return subflow->mp_capable; > } > > - if (mp_opt->dss && mp_opt->use_ack) { > + if ((mp_opt->suboptions & OPTION_MPTCP_DSS) && mp_opt->use_ack) { > /* subflows are fully established as soon as we get any > * additional ack. > */ > @@ -947,7 +942,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, > goto fully_established; > } > > - if (mp_opt->add_addr) { > + if (mp_opt->suboptions & OPTION_MPTCP_ADD_ADDR) { > WRITE_ONCE(msk->fully_established, true); > return true; > } > @@ -956,7 +951,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, > * then fallback to TCP. Fallback scenarios requires a reset for > * MP_JOIN subflows. > */ > - if (!mp_opt->mp_capable) { > + if (!(mp_opt->suboptions & OPTIONS_MPTCP_MPC)) { > if (subflow->mp_join) > goto reset; > subflow->mp_capable = 0; > @@ -965,7 +960,7 @@ static bool check_fully_established(struct mptcp_sock *msk, struct sock *ssk, > return false; > } > > - if (mp_opt->deny_join_id0) > + if (mp_opt->suboptions & OPTION_MPTCP_DENYID0) > WRITE_ONCE(msk->pm.remote_deny_join_id0, true); > > if (unlikely(!READ_ONCE(msk->pm.server_side))) > @@ -1120,13 +1115,13 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) > if (!check_fully_established(msk, sk, subflow, skb, &mp_opt)) > return sk->sk_state != TCP_CLOSE; > > - if (mp_opt.fastclose && > + if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) && > msk->local_key == mp_opt.rcvr_key) { > WRITE_ONCE(msk->rcv_fastclose, true); > mptcp_schedule_work((struct sock *)msk); > } > > - if (mp_opt.add_addr && add_addr_hmac_valid(msk, &mp_opt)) { > + if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) && add_addr_hmac_valid(msk, &mp_opt)) { > if (!mp_opt.echo) { > mptcp_pm_add_addr_received(msk, &mp_opt.addr); > MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR); > @@ -1138,34 +1133,28 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) > > if (mp_opt.addr.port) > MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD); > - > - mp_opt.add_addr = 0; > } > > - if (mp_opt.rm_addr) { > + if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR) > mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list); > - mp_opt.rm_addr = 0; > - } > > - if (mp_opt.mp_prio) { > + if (mp_opt.suboptions & OPTION_MPTCP_PRIO) { > mptcp_pm_mp_prio_received(sk, mp_opt.backup); > MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX); > - mp_opt.mp_prio = 0; > } > > - if (mp_opt.mp_fail) { > + if (mp_opt.suboptions & OPTION_MPTCP_FAIL) { > mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq); > MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX); > - mp_opt.mp_fail = 0; > } > > - if (mp_opt.reset) { > + if (mp_opt.suboptions & OPTION_MPTCP_RST) { > subflow->reset_seen = 1; > subflow->reset_reason = mp_opt.reset_reason; > subflow->reset_transient = mp_opt.reset_transient; > } > > - if (!mp_opt.dss) > + if (!(mp_opt.suboptions & OPTION_MPTCP_DSS)) > return true; > > /* we can't wait for recvmsg() to update the ack_seq, otherwise > @@ -1214,7 +1203,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) > } > mpext->data_len = mp_opt.data_len; > mpext->use_map = 1; > - mpext->csum_reqd = mp_opt.csum_reqd; > + mpext->csum_reqd = !!(mp_opt.suboptions & OPTION_MPTCP_CSUMREQD); > > if (mpext->csum_reqd) > mpext->csum = mp_opt.csum; > diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c > index 8eb2626503d7..b5f8ad634571 100644 > --- a/net/mptcp/protocol.c > +++ b/net/mptcp/protocol.c > @@ -2836,7 +2836,7 @@ struct sock *mptcp_sk_clone(const struct sock *sk, > msk->token = subflow_req->token; > msk->subflow = NULL; > WRITE_ONCE(msk->fully_established, false); > - if (mp_opt->csum_reqd) > + if (mp_opt->suboptions & OPTION_MPTCP_CSUMREQD) > WRITE_ONCE(msk->csum_enabled, true); > > msk->write_seq = subflow_req->idsn + 1; > @@ -2845,7 +2845,7 @@ struct sock *mptcp_sk_clone(const struct sock *sk, > msk->wnd_end = msk->snd_nxt + req->rsk_rcv_wnd; > msk->setsockopt_seq = mptcp_sk(sk)->setsockopt_seq; > > - if (mp_opt->mp_capable) { > + if (mp_opt->suboptions & OPTIONS_MPTCP_MPC) { > msk->can_ack = true; > msk->remote_key = mp_opt->sndr_key; > mptcp_crypto_key_sha(msk->remote_key, NULL, &ack_seq); > diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h > index 624a72e7ea17..9934bea21cb9 100644 > --- a/net/mptcp/protocol.h > +++ b/net/mptcp/protocol.h > @@ -29,6 +29,14 @@ > #define OPTION_MPTCP_DSS BIT(11) > #define OPTION_MPTCP_FAIL BIT(12) > > +#define OPTION_MPTCP_CSUMREQD BIT(13) > +#define OPTION_MPTCP_DENYID0 BIT(14) > + > +#define OPTIONS_MPTCP_MPC (OPTION_MPTCP_MPC_SYN | OPTION_MPTCP_MPC_SYNACK | \ > + OPTION_MPTCP_MPC_ACK) > +#define OPTIONS_MPTCP_MPJ (OPTION_MPTCP_MPJ_SYN | OPTION_MPTCP_MPJ_SYNACK | \ > + OPTION_MPTCP_MPJ_SYNACK) > + > /* MPTCP option subtypes */ > #define MPTCPOPT_MP_CAPABLE 0 > #define MPTCPOPT_MP_JOIN 1 > @@ -132,15 +140,7 @@ struct mptcp_options_received { > u32 subflow_seq; > u16 data_len; > __sum16 csum; > - u16 mp_capable : 1, > - mp_join : 1, > - fastclose : 1, > - reset : 1, > - dss : 1, > - add_addr : 1, > - rm_addr : 1, > - mp_prio : 1, > - mp_fail : 1; > + u16 suboptions; > u32 token; > u32 nonce; > u16 use_map:1, > @@ -152,9 +152,7 @@ struct mptcp_options_received { > reset_reason:4, > reset_transient:1, > echo:1, > - csum_reqd:1, > backup:1, > - deny_join_id0:1, > __unused:1; > u8 join_id; > u64 thmac; > diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c > index 54b7ffc21861..670bed9fcf2e 100644 > --- a/net/mptcp/subflow.c > +++ b/net/mptcp/subflow.c > @@ -141,6 +141,7 @@ static int subflow_check_req(struct request_sock *req, > struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); > struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); > struct mptcp_options_received mp_opt; > + bool opt_mp_capable, opt_mp_join; > > pr_debug("subflow_req=%p, listener=%p", subflow_req, listener); > > @@ -154,16 +155,18 @@ static int subflow_check_req(struct request_sock *req, > > mptcp_get_options(sk_listener, skb, &mp_opt); > > - if (mp_opt.mp_capable) { > + opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC); > + opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); > + if (opt_mp_capable) { > SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE); > > - if (mp_opt.mp_join) > + if (opt_mp_join) > return 0; > - } else if (mp_opt.mp_join) { > + } else if (opt_mp_join) { > SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINSYNRX); > } > > - if (mp_opt.mp_capable && listener->request_mptcp) { > + if (opt_mp_capable && listener->request_mptcp) { > int err, retries = MPTCP_TOKEN_MAX_RETRIES; > > subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq; > @@ -194,7 +197,7 @@ static int subflow_check_req(struct request_sock *req, > else > SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_TOKENFALLBACKINIT); > > - } else if (mp_opt.mp_join && listener->request_mptcp) { > + } else if (opt_mp_join && listener->request_mptcp) { > subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq; > subflow_req->mp_join = 1; > subflow_req->backup = mp_opt.backup; > @@ -243,15 +246,18 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req, > struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk_listener); > struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); > struct mptcp_options_received mp_opt; > + bool opt_mp_capable, opt_mp_join; > int err; > > subflow_init_req(req, sk_listener); > mptcp_get_options(sk_listener, skb, &mp_opt); > > - if (mp_opt.mp_capable && mp_opt.mp_join) > + opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC); > + opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); > + if (opt_mp_capable && opt_mp_join) > return -EINVAL; > > - if (mp_opt.mp_capable && listener->request_mptcp) { > + if (opt_mp_capable && listener->request_mptcp) { > if (mp_opt.sndr_key == 0) > return -EINVAL; > > @@ -262,7 +268,7 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req, > > subflow_req->mp_capable = 1; > subflow_req->ssn_offset = TCP_SKB_CB(skb)->seq - 1; > - } else if (mp_opt.mp_join && listener->request_mptcp) { > + } else if (opt_mp_join && listener->request_mptcp) { > if (!mptcp_token_join_cookie_init_state(subflow_req, skb)) > return -EINVAL; > > @@ -394,7 +400,6 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) > > subflow->icsk_af_ops->sk_rx_dst_set(sk, skb); > > - > /* be sure no special action on any packet other than syn-ack */ > if (subflow->conn_finished) > return; > @@ -407,7 +412,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) > > mptcp_get_options(sk, skb, &mp_opt); > if (subflow->request_mptcp) { > - if (!mp_opt.mp_capable) { > + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) { > MPTCP_INC_STATS(sock_net(sk), > MPTCP_MIB_MPCAPABLEACTIVEFALLBACK); > mptcp_do_fallback(sk); > @@ -415,9 +420,9 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) > goto fallback; > } > > - if (mp_opt.csum_reqd) > + if (mp_opt.suboptions & OPTION_MPTCP_CSUMREQD) > WRITE_ONCE(mptcp_sk(parent)->csum_enabled, true); > - if (mp_opt.deny_join_id0) > + if (mp_opt.suboptions & OPTION_MPTCP_DENYID0) > WRITE_ONCE(mptcp_sk(parent)->pm.remote_deny_join_id0, true); > subflow->mp_capable = 1; > subflow->can_ack = 1; > @@ -430,7 +435,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb) > } else if (subflow->request_join) { > u8 hmac[SHA256_DIGEST_SIZE]; > > - if (!mp_opt.mp_join) { > + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ)) { > subflow->reset_reason = MPTCP_RST_EMPTCP; > goto do_reset; > } > @@ -636,10 +641,10 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, > > pr_debug("listener=%p, req=%p, conn=%p", listener, req, listener->conn); > > - /* After child creation we must look for 'mp_capable' even when options > + /* After child creation we must look for MPC even when options > * are not parsed > */ > - mp_opt.mp_capable = 0; > + mp_opt.suboptions = 0; > > /* hopefully temporary handling for MP_JOIN+syncookie */ > subflow_req = mptcp_subflow_rsk(req); > @@ -659,7 +664,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, > * options. > */ > mptcp_get_options(sk, skb, &mp_opt); > - if (!mp_opt.mp_capable) { > + if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) { > fallback = true; > goto create_child; > } > @@ -668,8 +673,10 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, > if (!new_msk) > fallback = true; > } else if (subflow_req->mp_join) { > + bool opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ); > + > mptcp_get_options(sk, skb, &mp_opt); > - if (!mp_opt.mp_join || !subflow_hmac_valid(req, &mp_opt) || > + if (!opt_mp_join || !subflow_hmac_valid(req, &mp_opt) || > !mptcp_can_accept_new_subflow(subflow_req->msk)) { > SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINACKMAC); > fallback = true; > @@ -726,7 +733,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, > /* with OoO packets we can reach here without ingress > * mpc option > */ > - if (mp_opt.mp_capable) > + if (mp_opt.suboptions & OPTIONS_MPTCP_MPC) > mptcp_subflow_fully_established(ctx, &mp_opt); > } else if (ctx->mp_join) { > struct mptcp_sock *owner; > -- > 2.26.3 > > > -- Mat Martineau Intel ^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH net-next 4/4] mptcp: optimize the input options processing. 2021-08-18 10:35 [PATCH net-next 1/4] mptcp: do not set unconditionally csum_reqd on incoming opt Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 2/4] mptcp: better binary layout for mptcp_options_received Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask Paolo Abeni @ 2021-08-18 10:35 ` Paolo Abeni 2 siblings, 0 replies; 5+ messages in thread From: Paolo Abeni @ 2021-08-18 10:35 UTC (permalink / raw) To: mptcp Most MPTCP packets carries a single MPTCP subption: the DSS containing the mapping for the current packet. Check explicitly for the above, so that is such scenario we replace most conditional statements with a single likely() one. Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- net/mptcp/options.c | 70 +++++++++++++++++++++++---------------------- 1 file changed, 36 insertions(+), 34 deletions(-) diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 18ad028ed589..61ef080ed46c 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -1115,48 +1115,50 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) if (!check_fully_established(msk, sk, subflow, skb, &mp_opt)) return sk->sk_state != TCP_CLOSE; - if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) && - msk->local_key == mp_opt.rcvr_key) { - WRITE_ONCE(msk->rcv_fastclose, true); - mptcp_schedule_work((struct sock *)msk); - } + if (unlikely(mp_opt.suboptions != OPTION_MPTCP_DSS)) { + if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) && + msk->local_key == mp_opt.rcvr_key) { + WRITE_ONCE(msk->rcv_fastclose, true); + mptcp_schedule_work((struct sock *)msk); + } - if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) && add_addr_hmac_valid(msk, &mp_opt)) { - if (!mp_opt.echo) { - mptcp_pm_add_addr_received(msk, &mp_opt.addr); - MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR); - } else { - mptcp_pm_add_addr_echoed(msk, &mp_opt.addr); - mptcp_pm_del_add_timer(msk, &mp_opt.addr, true); - MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ECHOADD); + if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) && add_addr_hmac_valid(msk, &mp_opt)) { + if (!mp_opt.echo) { + mptcp_pm_add_addr_received(msk, &mp_opt.addr); + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ADDADDR); + } else { + mptcp_pm_add_addr_echoed(msk, &mp_opt.addr); + mptcp_pm_del_add_timer(msk, &mp_opt.addr, true); + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_ECHOADD); + } + + if (mp_opt.addr.port) + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD); } - if (mp_opt.addr.port) - MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_PORTADD); - } + if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR) + mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list); - if (mp_opt.suboptions & OPTION_MPTCP_RM_ADDR) - mptcp_pm_rm_addr_received(msk, &mp_opt.rm_list); + if (mp_opt.suboptions & OPTION_MPTCP_PRIO) { + mptcp_pm_mp_prio_received(sk, mp_opt.backup); + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX); + } - if (mp_opt.suboptions & OPTION_MPTCP_PRIO) { - mptcp_pm_mp_prio_received(sk, mp_opt.backup); - MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPPRIORX); - } + if (mp_opt.suboptions & OPTION_MPTCP_FAIL) { + mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq); + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX); + } - if (mp_opt.suboptions & OPTION_MPTCP_FAIL) { - mptcp_pm_mp_fail_received(sk, mp_opt.fail_seq); - MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILRX); - } + if (mp_opt.suboptions & OPTION_MPTCP_RST) { + subflow->reset_seen = 1; + subflow->reset_reason = mp_opt.reset_reason; + subflow->reset_transient = mp_opt.reset_transient; + } - if (mp_opt.suboptions & OPTION_MPTCP_RST) { - subflow->reset_seen = 1; - subflow->reset_reason = mp_opt.reset_reason; - subflow->reset_transient = mp_opt.reset_transient; + if (!(mp_opt.suboptions & OPTION_MPTCP_DSS)) + return true; } - if (!(mp_opt.suboptions & OPTION_MPTCP_DSS)) - return true; - /* we can't wait for recvmsg() to update the ack_seq, otherwise * monodirectional flows will stuck */ @@ -1183,7 +1185,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) memset(mpext, 0, sizeof(*mpext)); - if (mp_opt.use_map) { + if (likely(mp_opt.use_map)) { if (mp_opt.mpc_map) { /* this is an MP_CAPABLE carrying MPTCP data * we know this map the first chunk of data -- 2.26.3 ^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-08-19 1:10 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-08-18 10:35 [PATCH net-next 1/4] mptcp: do not set unconditionally csum_reqd on incoming opt Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 2/4] mptcp: better binary layout for mptcp_options_received Paolo Abeni 2021-08-18 10:35 ` [PATCH net-next 3/4] mptcp: consolidate in_opt sub-options fields in a bitmask Paolo Abeni 2021-08-19 1:10 ` Mat Martineau 2021-08-18 10:35 ` [PATCH net-next 4/4] mptcp: optimize the input options processing Paolo Abeni
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