From: Yonglong Li <liyonglong@chinatelecom.cn>
To: Geliang Tang <geliangtang@gmail.com>
Cc: mptcp@lists.linux.dev,
Mat Martineau <mathew.j.martineau@linux.intel.com>
Subject: Re: [PATCH v7 3/5] mptcp: build ADD_ADDR/echo-ADD_ADDR option according pm.add_signal
Date: Fri, 2 Jul 2021 14:15:55 +0800 [thread overview]
Message-ID: <372dc8e1-1c6f-c70d-54c7-2e9e117ad0ab@chinatelecom.cn> (raw)
In-Reply-To: <CA+WQbws0e9dkYy_VDimHQkuXF-fyAz1z1SGWYHcLFycNykaZrA@mail.gmail.com>
Hi Geliang,
Thanks for your reviews.
On 2021/6/30 19:14, Geliang Tang wrote:
> Hi Yonglong,
>
> Thank you for this new patch!
>
> Yonglong Li <liyonglong@chinatelecom.cn> 于2021年6月30日周三 下午6:24写道：
>>
>> according MPTCP_ADD_ADDR_SIGNAL and MPTCP_ADD_ADDR_ECHO flag build
>> ADD_ADDR/echo-ADD_ADDR option
>>
>> add a suboptions type OPTION_MPTCP_ADD_ECHO to mark as echo option
>>
>> Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
>> ---
>> include/net/mptcp.h | 3 ++-
>> net/mptcp/options.c | 54 +++++++++++++++++++++++++++++-----------------------
>> net/mptcp/pm.c | 35 +++++++++++++++++++++++-----------
>> net/mptcp/protocol.h | 25 ++++++++++++++++--------
>> 4 files changed, 73 insertions(+), 44 deletions(-)
>>
>> diff --git a/include/net/mptcp.h b/include/net/mptcp.h
>> index d61bbbf..d2c6ebe 100644
>> --- a/include/net/mptcp.h
>> +++ b/include/net/mptcp.h
>> @@ -61,7 +61,8 @@ struct mptcp_out_options {
>> u64 sndr_key;
>> u64 rcvr_key;
>> u64 ahmac;
>> - struct mptcp_addr_info addr;
>> + struct mptcp_addr_info local;
>> + struct mptcp_addr_info remote;
>> struct mptcp_rm_list rm_list;
>> u8 join_id;
>> u8 backup;
>> diff --git a/net/mptcp/options.c b/net/mptcp/options.c
>> index 1aec016..cceff0a 100644
>> --- a/net/mptcp/options.c
>> +++ b/net/mptcp/options.c
>> @@ -655,13 +655,16 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
>> struct mptcp_sock *msk = mptcp_sk(subflow->conn);
>> bool drop_other_suboptions = false;
>> unsigned int opt_size = *size;
>> - bool echo;
>> - bool port;
>> - int len;
>> + u8 add_addr;
>> + int len = 0;
>>
>> - if ((mptcp_pm_should_add_signal_ipv6(msk) ||
>> - mptcp_pm_should_add_signal_port(msk) ||
>> - mptcp_pm_should_add_signal_echo(msk)) &&
>> + if (!mptcp_pm_should_add_signal(msk) ||
>> + !mptcp_pm_add_addr_signal(msk, skb, opt_size, remaining, opts, &add_addr))
>> + return false;
>> +
>> + if (((add_addr & BIT(MPTCP_ADD_ADDR_ECHO)) ||
>> + ((add_addr & BIT(MPTCP_ADD_ADDR_SIGNAL)) &&
>> + (opts->local.family == AF_INET6 || opts->local.port))) &&
>> skb && skb_is_tcp_pure_ack(skb)) {
>> pr_debug("drop other suboptions");
>> opts->suboptions = 0;
>> @@ -671,11 +674,7 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
>> drop_other_suboptions = true;
>> }
>>
>> - if (!mptcp_pm_should_add_signal(msk) ||
>> - !(mptcp_pm_add_addr_signal(msk, remaining, &opts->addr, &echo, &port)))
>> - return false;
>> -
>> - len = mptcp_add_addr_len(opts->addr.family, echo, port);
>> + len = mptcp_add_addr_len(msk, opts);
>> if (remaining < len)
>> return false;
>>
>> @@ -683,13 +682,16 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
>> if (drop_other_suboptions)
>> *size -= opt_size;
>> opts->suboptions |= OPTION_MPTCP_ADD_ADDR;
>> - if (!echo) {
>> + if (!(add_addr & BIT(MPTCP_ADD_ADDR_ECHO)) &&
>> + (add_addr & BIT(MPTCP_ADD_ADDR_SIGNAL))) {
>> opts->ahmac = add_addr_generate_hmac(msk->local_key,
>> msk->remote_key,
>> - &opts->addr);
>> + &opts->local);
>> }
>> - pr_debug("addr_id=%d, ahmac=%llu, echo=%d, port=%d",
>> - opts->addr.id, opts->ahmac, echo, ntohs(opts->addr.port));
>> +
>
> Drop this blank line.
>
>> + pr_debug("addr_signal:%x, echo=%d, local_addr_id=%d, ahmac=%llu, local_port=%d, remote_addr_id=%d, remote_port=%d",
>> + add_addr, (opts->ahmac == 0), opts->local.id,
>> + opts->ahmac, ntohs(opts->local.port), opts->remote.id, ntohs(opts->remote.port));
>>
>> return true;
>> }
>> @@ -1229,15 +1231,19 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
>>
>> mp_capable_done:
>> if (OPTION_MPTCP_ADD_ADDR & opts->suboptions) {
>> + struct mptcp_addr_info *addr = &opts->remote;
>> u8 len = TCPOLEN_MPTCP_ADD_ADDR_BASE;
>> u8 echo = MPTCP_ADDR_ECHO;
>>
>> + if (opts->ahmac)
>> + addr = &opts->local;
>> +
>> #if IS_ENABLED(CONFIG_MPTCP_IPV6)
>> - if (opts->addr.family == AF_INET6)
>> + if (addr->family == AF_INET6)
>> len = TCPOLEN_MPTCP_ADD_ADDR6_BASE;
>> #endif
>>
>> - if (opts->addr.port)
>> + if (addr->port)
>> len += TCPOLEN_MPTCP_PORT_LEN;
>>
>> if (opts->ahmac) {
>> @@ -1246,25 +1252,25 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
>> }
>>
>> *ptr++ = mptcp_option(MPTCPOPT_ADD_ADDR,
>> - len, echo, opts->addr.id);
>> - if (opts->addr.family == AF_INET) {
>> - memcpy((u8 *)ptr, (u8 *)&opts->addr.addr.s_addr, 4);
>> + len, echo, addr->id);
>> + if (addr->family == AF_INET) {
>> + memcpy((u8 *)ptr, (u8 *)&addr->addr.s_addr, 4);
>> ptr += 1;
>> }
>> #if IS_ENABLED(CONFIG_MPTCP_IPV6)
>> - else if (opts->addr.family == AF_INET6) {
>> - memcpy((u8 *)ptr, opts->addr.addr6.s6_addr, 16);
>> + else if (addr->family == AF_INET6) {
>> + memcpy((u8 *)ptr, addr->addr6.s6_addr, 16);
>> ptr += 4;
>> }
>> #endif
>>
>> - if (!opts->addr.port) {
>> + if (!addr->port) {
>> if (opts->ahmac) {
>> put_unaligned_be64(opts->ahmac, ptr);
>> ptr += 2;
>> }
>> } else {
>> - u16 port = ntohs(opts->addr.port);
>> + u16 port = ntohs(addr->port);
>>
>> if (opts->ahmac) {
>> u8 *bptr = (u8 *)ptr;
>> diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
>> index 0dc9021..9c5b15c 100644
>> --- a/net/mptcp/pm.c
>> +++ b/net/mptcp/pm.c
>> @@ -253,11 +253,11 @@ void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup)
>>
>> /* path manager helpers */
>>
>> -bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
>> - struct mptcp_addr_info *saddr, bool *echo, bool *port)
>> +bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
>> + unsigned int opt_size, unsigned int remaining,
>> + struct mptcp_out_options *opts, u8 *add_addr)
>> {
>> - int ret = false;
>> - u8 add_addr;
>> + int ret = false, len;
>>
>> spin_lock_bh(&msk->pm.lock);
>>
>> @@ -265,18 +265,31 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
>> if (!mptcp_pm_should_add_signal(msk))
>> goto out_unlock;
>>
>> - *echo = mptcp_pm_should_add_signal_echo(msk);
>> - *port = mptcp_pm_should_add_signal_port(msk);
>> + opts->local = msk->pm.local;
>> + opts->remote = msk->pm.remote;
>> + *add_addr = msk->pm.addr_signal;
>> +
>> + if (((msk->pm.addr_signal & BIT(MPTCP_ADD_ADDR_ECHO)) ||
>> + ((msk->pm.addr_signal & BIT(MPTCP_ADD_ADDR_SIGNAL)) &&
>> + (msk->pm.local.family == AF_INET6 || msk->pm.local.port))) &&
>> + skb && skb_is_tcp_pure_ack(skb)) {
>> + remaining += opt_size;
>> + }
>
> Move it back to mptcp_established_options_add_addr, if so, no need to
> add the opt_size argument too.
ok.
>
>>
>> - if (remaining < mptcp_add_addr_len(msk->pm.local.family, *echo, *port))
>> + len = mptcp_add_addr_len(msk, opts);
>> + if (remaining < len)
>> goto out_unlock;
>>
>> - *saddr = msk->pm.local;
>> - add_addr = msk->pm.addr_signal & ~(BIT(MPTCP_ADD_ADDR_SIGNAL) | BIT(MPTCP_ADD_ADDR_ECHO));
>> - WRITE_ONCE(msk->pm.addr_signal, add_addr);
>> - ret = true;
>> + if ((msk->pm.addr_signal & BIT(MPTCP_ADD_ADDR_ECHO)))
>> + WRITE_ONCE(msk->pm.addr_signal, msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_ECHO));
>> + else
>> + WRITE_ONCE(msk->pm.addr_signal, msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_SIGNAL));
>>
>
> Drop this blank line.
>
>> + ret = true;
>> out_unlock:
>> + if ((mptcp_pm_should_add_signal_echo(msk)) && (mptcp_pm_should_add_signal_addr(msk)))
>> + mptcp_pm_schedule_work(msk, MPTCP_PM_ADD_ADDR_SEND_ACK);
>> +
>
> Again, why we need these two lines?sorry, these two lines is usless now.
>
>> spin_unlock_bh(&msk->pm.lock);
>> return ret;
>> }
>> diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
>> index a0b0ec0..caa4a60 100644
>> --- a/net/mptcp/protocol.h
>> +++ b/net/mptcp/protocol.h
>> @@ -737,16 +737,24 @@ static inline bool mptcp_pm_should_rm_signal(struct mptcp_sock *msk)
>> return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_RM_ADDR_SIGNAL);
>> }
>>
>> -static inline unsigned int mptcp_add_addr_len(int family, bool echo, bool port)
>> +static inline unsigned int mptcp_add_addr_len(struct mptcp_sock *msk,
>> + struct mptcp_out_options *opts)
>> {
>> - u8 len = TCPOLEN_MPTCP_ADD_ADDR_BASE;
>> + u8 len = 0;
>> + struct mptcp_addr_info *addr = &opts->remote;
>
> Use the reverse xmas tree order.
sorry.
>
> Thanks,
> -Geliang
>
>>
>> - if (family == AF_INET6)
>> - len = TCPOLEN_MPTCP_ADD_ADDR6_BASE;
>> - if (!echo)
>> + if (mptcp_pm_should_add_signal_addr(msk)) {
>> + addr = &opts->local;
>> len += MPTCPOPT_THMAC_LEN;
>> + }
>> +
>> + if (addr->family == AF_INET6)
>> + len += TCPOLEN_MPTCP_ADD_ADDR6_BASE;
>> + else
>> + len += TCPOLEN_MPTCP_ADD_ADDR_BASE;
>> +
>> /* account for 2 trailing 'nop' options */
>> - if (port)
>> + if (addr->port)
>> len += TCPOLEN_MPTCP_PORT_LEN + TCPOLEN_MPTCP_PORT_ALIGN;
>>
>> return len;
>> @@ -760,8 +768,9 @@ static inline int mptcp_rm_addr_len(const struct mptcp_rm_list *rm_list)
>> return TCPOLEN_MPTCP_RM_ADDR_BASE + roundup(rm_list->nr - 1, 4) + 1;
>> }
>>
>> -bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
>> - struct mptcp_addr_info *saddr, bool *echo, bool *port);
>> +bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
>> + unsigned int opt_size, unsigned int remaining,
>> + struct mptcp_out_options *opts, u8 *add_addr);
>> bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
>> struct mptcp_rm_list *rm_list);
>> int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);
>> --
>> 1.8.3.1
>>
>
--
Li YongLong
next prev parent reply other threads:[~2021-07-02 6:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 10:24 [PATCH v7 0/4] mptcp: fix conflicts when using pm.add_signal in ADD_ADDR/echo and RM_ADDR process Yonglong Li
2021-06-30 10:24 ` [PATCH v7 1/5] mptcp: fix ADD_ADDR and RM_ADDR maybe flush addr_signal each other Yonglong Li
2021-06-30 10:37 ` Geliang Tang
2021-07-02 6:23 ` Yonglong Li
2021-06-30 10:24 ` [PATCH v7 2/5] mptcp: make MPTCP_ADD_ADDR_SIGNAL and MPTCP_ADD_ADDR_ECHO separate Yonglong Li
2021-06-30 10:24 ` [PATCH v7 3/5] mptcp: build ADD_ADDR/echo-ADD_ADDR option according pm.add_signal Yonglong Li
2021-06-30 11:14 ` Geliang Tang
2021-07-02 6:15 ` Yonglong Li [this message]
2021-06-30 10:24 ` [PATCH v7 4/5] mptcp: remove some double-check Yonglong Li
2021-06-30 10:57 ` Geliang Tang
2021-07-02 6:22 ` Yonglong Li
2021-07-02 8:06 ` Geliang Tang
2021-06-30 10:24 ` [PATCH v7 5/5] mptcp: remove MPTCP_ADD_ADDR_IPV6 and MPTCP_ADD_ADDR_PORT Yonglong Li
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