* [PATCH v4 1/2] mptcp: add MSG_PEEK support
@ 2021-04-19 2:53 Yonglong Li
2021-04-19 2:53 ` [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK Yonglong Li
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Yonglong Li @ 2021-04-19 2:53 UTC (permalink / raw)
To: mptcp
Cc: mathew.j.martineau, matthieu.baerts, fw, pabeni, geliangtang,
qitiepeng, Yonglong Li
This patch adds support for MSG_PEEK flag. Packets are not removed
from the receive_queue if MSG_PEEK set in recv() system call.
Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
---
net/mptcp/protocol.c | 28 ++++++++++++++++------------
1 file changed, 16 insertions(+), 12 deletions(-)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 16d73ec..75f4420 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1739,12 +1739,12 @@ static void mptcp_wait_data(struct sock *sk, long *timeo)
static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
struct msghdr *msg,
- size_t len)
+ size_t len, int flags)
{
- struct sk_buff *skb;
+ struct sk_buff *skb, *tmp;
int copied = 0;
- while ((skb = skb_peek(&msk->receive_queue)) != NULL) {
+ skb_queue_walk_safe(&msk->receive_queue, skb, tmp) {
u32 offset = MPTCP_SKB_CB(skb)->offset;
u32 data_len = skb->len - offset;
u32 count = min_t(size_t, len - copied, data_len);
@@ -1760,15 +1760,18 @@ static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
copied += count;
if (count < data_len) {
- MPTCP_SKB_CB(skb)->offset += count;
+ if (!(flags & MSG_PEEK))
+ MPTCP_SKB_CB(skb)->offset += count;
break;
}
- /* we will bulk release the skb memory later */
- skb->destructor = NULL;
- msk->rmem_released += skb->truesize;
- __skb_unlink(skb, &msk->receive_queue);
- __kfree_skb(skb);
+ if (!(flags & MSG_PEEK)) {
+ /* we will bulk release the skb memory later */
+ skb->destructor = NULL;
+ msk->rmem_released += skb->truesize;
+ __skb_unlink(skb, &msk->receive_queue);
+ __kfree_skb(skb);
+ }
if (copied >= len)
break;
@@ -1945,7 +1948,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int target;
long timeo;
- if (msg->msg_flags & ~(MSG_WAITALL | MSG_DONTWAIT))
+ if (flags & ~(MSG_PEEK | MSG_WAITALL | MSG_DONTWAIT))
return -EOPNOTSUPP;
mptcp_lock_sock(sk, __mptcp_splice_receive_queue(sk));
@@ -1962,7 +1965,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
while (copied < len) {
int bytes_read;
- bytes_read = __mptcp_recvmsg_mskq(msk, msg, len - copied);
+ bytes_read = __mptcp_recvmsg_mskq(msk, msg, len - copied, flags);
if (unlikely(bytes_read < 0)) {
if (!copied)
copied = bytes_read;
@@ -2046,7 +2049,8 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
pr_debug("msk=%p data_ready=%d rx queue empty=%d copied=%d",
msk, test_bit(MPTCP_DATA_READY, &msk->flags),
skb_queue_empty_lockless(&sk->sk_receive_queue), copied);
- mptcp_rcv_space_adjust(msk, copied);
+ if (!(flags & MSG_PEEK))
+ mptcp_rcv_space_adjust(msk, copied);
release_sock(sk);
return copied;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK
2021-04-19 2:53 [PATCH v4 1/2] mptcp: add MSG_PEEK support Yonglong Li
@ 2021-04-19 2:53 ` Yonglong Li
2021-04-19 11:23 ` Paolo Abeni
2021-04-19 11:22 ` [PATCH v4 1/2] mptcp: add MSG_PEEK support Paolo Abeni
2021-04-19 16:54 ` Matthieu Baerts
2 siblings, 1 reply; 5+ messages in thread
From: Yonglong Li @ 2021-04-19 2:53 UTC (permalink / raw)
To: mptcp
Cc: mathew.j.martineau, matthieu.baerts, fw, pabeni, geliangtang,
qitiepeng, Yonglong Li
Extend mptcp_connect tool with MSG_PEEK support and add a test case in
mptcp_connect.sh that checks the data recvived from/after recv() with
MSG_PEEK.
Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
---
tools/testing/selftests/net/mptcp/mptcp_connect.c | 48 +++++++++++++++++++++-
tools/testing/selftests/net/mptcp/mptcp_connect.sh | 17 ++++++++
2 files changed, 63 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
index 2f207cf..d88e1fd 100644
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
@@ -45,7 +45,14 @@ enum cfg_mode {
CFG_MODE_SENDFILE,
};
+enum cfg_peek {
+ CFG_NONE_PEEK,
+ CFG_WITH_PEEK,
+ CFG_AFTER_PEEK,
+};
+
static enum cfg_mode cfg_mode = CFG_MODE_POLL;
+static enum cfg_peek cfg_peek = CFG_NONE_PEEK;
static const char *cfg_host;
static const char *cfg_port = "12000";
static int cfg_sock_proto = IPPROTO_MPTCP;
@@ -73,6 +80,8 @@ static void die_usage(void)
fprintf(stderr, "\t-M mark -- set socket packet mark\n");
fprintf(stderr, "\t-u -- check mptcp ulp\n");
fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n");
+ fprintf(stderr,
+ "\t-P [saveWithPeek|saveAfterPeek] -- save data with/after MSG_PEEK form tcp socket\n");
exit(1);
}
@@ -331,6 +340,8 @@ static size_t do_write(const int fd, char *buf, const size_t len)
static ssize_t do_rnd_read(const int fd, char *buf, const size_t len)
{
+ int ret = 0;
+ char tmp[16384];
size_t cap = rand();
cap &= 0xffff;
@@ -340,7 +351,17 @@ static ssize_t do_rnd_read(const int fd, char *buf, const size_t len)
else if (cap > len)
cap = len;
- return read(fd, buf, cap);
+ if (cfg_peek == CFG_WITH_PEEK) {
+ ret = recv(fd, buf, cap, MSG_PEEK);
+ ret = (ret < 0) ? ret : read(fd, tmp, ret);
+ } else if (cfg_peek == CFG_AFTER_PEEK) {
+ ret = recv(fd, buf, cap, MSG_PEEK);
+ ret = (ret < 0) ? ret : read(fd, buf, cap);
+ } else {
+ ret = read(fd, buf, cap);
+ }
+
+ return ret;
}
static void set_nonblock(int fd)
@@ -819,6 +840,26 @@ int parse_mode(const char *mode)
return 0;
}
+int parse_peek(const char *mode)
+{
+ if (!strcasecmp(mode, "saveWithPeek"))
+ return CFG_WITH_PEEK;
+ if (!strcasecmp(mode, "saveAfterPeek"))
+ return CFG_AFTER_PEEK;
+
+ fprintf(stderr, "Unknown: %s\n", mode);
+ fprintf(stderr, "Supported MSG_PEEK mode are:\n");
+ fprintf(stderr,
+ "\t\t\"saveWithPeek\" - recv data with flags 'MSG_PEEK' and save the peek data into file\n");
+ fprintf(stderr,
+ "\t\t\"saveAfterPeek\" - read and save data into file after recv with flags 'MSG_PEEK'\n");
+
+ die_usage();
+
+ /* silence compiler warning */
+ return 0;
+}
+
static int parse_int(const char *size)
{
unsigned long s;
@@ -846,7 +887,7 @@ static void parse_opts(int argc, char **argv)
{
int c;
- while ((c = getopt(argc, argv, "6jr:lp:s:hut:m:S:R:w:M:")) != -1) {
+ while ((c = getopt(argc, argv, "6jr:lp:s:hut:m:S:R:w:M:P:")) != -1) {
switch (c) {
case 'j':
cfg_join = true;
@@ -899,6 +940,9 @@ static void parse_opts(int argc, char **argv)
case 'M':
cfg_mark = strtol(optarg, NULL, 0);
break;
+ case 'P':
+ cfg_peek = parse_peek(optarg);
+ break;
}
}
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index 385cdc9..319d166 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -23,6 +23,8 @@ rcvbuf=0
options_log=true
do_tcp=0
filesize=0
+peekmode=""
+testpeek=false
if [ $tc_loss -eq 100 ];then
tc_loss=1%
@@ -393,6 +395,10 @@ do_transfer()
extra_args="$extra_args -m $testmode"
fi
+ if $testpeek; then
+ extra_args="$extra_args -P $peekmode"
+ fi
+
if [ -n "$extra_args" ] && $options_log; then
options_log=false
echo "INFO: extra options: $extra_args"
@@ -732,6 +738,17 @@ for sender in $ns1 $ns2 $ns3 $ns4;do
run_tests "$ns4" $sender dead:beef:3::1
done
+testpeek=true
+options_log=true
+peekmode="saveAfterPeek"
+run_tests_lo "$ns1" "$ns1" 10.0.1.1 1
+run_tests_lo "$ns1" $sender dead:beef:1::1 1
+
+options_log=true
+peekmode="saveAfterPeek"
+run_tests_lo "$ns1" "$ns1" 10.0.1.1 1
+run_tests_lo "$ns1" $sender dead:beef:1::1 1
+
time_end=$(date +%s)
time_run=$((time_end-time_start))
--
1.8.3.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v4 1/2] mptcp: add MSG_PEEK support
2021-04-19 2:53 [PATCH v4 1/2] mptcp: add MSG_PEEK support Yonglong Li
2021-04-19 2:53 ` [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK Yonglong Li
@ 2021-04-19 11:22 ` Paolo Abeni
2021-04-19 16:54 ` Matthieu Baerts
2 siblings, 0 replies; 5+ messages in thread
From: Paolo Abeni @ 2021-04-19 11:22 UTC (permalink / raw)
To: Yonglong Li, mptcp
Cc: mathew.j.martineau, matthieu.baerts, fw, geliangtang, qitiepeng
On Mon, 2021-04-19 at 10:53 +0800, Yonglong Li wrote:
> This patch adds support for MSG_PEEK flag. Packets are not removed
> from the receive_queue if MSG_PEEK set in recv() system call.
>
> Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
> ---
> net/mptcp/protocol.c | 28 ++++++++++++++++------------
> 1 file changed, 16 insertions(+), 12 deletions(-)
>
> diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
> index 16d73ec..75f4420 100644
> --- a/net/mptcp/protocol.c
> +++ b/net/mptcp/protocol.c
> @@ -1739,12 +1739,12 @@ static void mptcp_wait_data(struct sock *sk, long *timeo)
>
> static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
> struct msghdr *msg,
> - size_t len)
> + size_t len, int flags)
> {
> - struct sk_buff *skb;
> + struct sk_buff *skb, *tmp;
> int copied = 0;
>
> - while ((skb = skb_peek(&msk->receive_queue)) != NULL) {
> + skb_queue_walk_safe(&msk->receive_queue, skb, tmp) {
> u32 offset = MPTCP_SKB_CB(skb)->offset;
> u32 data_len = skb->len - offset;
> u32 count = min_t(size_t, len - copied, data_len);
> @@ -1760,15 +1760,18 @@ static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
> copied += count;
>
> if (count < data_len) {
> - MPTCP_SKB_CB(skb)->offset += count;
> + if (!(flags & MSG_PEEK))
> + MPTCP_SKB_CB(skb)->offset += count;
> break;
> }
>
> - /* we will bulk release the skb memory later */
> - skb->destructor = NULL;
> - msk->rmem_released += skb->truesize;
> - __skb_unlink(skb, &msk->receive_queue);
> - __kfree_skb(skb);
> + if (!(flags & MSG_PEEK)) {
> + /* we will bulk release the skb memory later */
> + skb->destructor = NULL;
> + msk->rmem_released += skb->truesize;
> + __skb_unlink(skb, &msk->receive_queue);
> + __kfree_skb(skb);
> + }
>
> if (copied >= len)
> break;
> @@ -1945,7 +1948,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
> int target;
> long timeo;
>
> - if (msg->msg_flags & ~(MSG_WAITALL | MSG_DONTWAIT))
> + if (flags & ~(MSG_PEEK | MSG_WAITALL | MSG_DONTWAIT))
> return -EOPNOTSUPP;
>
> mptcp_lock_sock(sk, __mptcp_splice_receive_queue(sk));
> @@ -1962,7 +1965,7 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
> while (copied < len) {
> int bytes_read;
>
> - bytes_read = __mptcp_recvmsg_mskq(msk, msg, len - copied);
> + bytes_read = __mptcp_recvmsg_mskq(msk, msg, len - copied, flags);
> if (unlikely(bytes_read < 0)) {
> if (!copied)
> copied = bytes_read;
> @@ -2046,7 +2049,8 @@ static int mptcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
> pr_debug("msk=%p data_ready=%d rx queue empty=%d copied=%d",
> msk, test_bit(MPTCP_DATA_READY, &msk->flags),
> skb_queue_empty_lockless(&sk->sk_receive_queue), copied);
> - mptcp_rcv_space_adjust(msk, copied);
> + if (!(flags & MSG_PEEK))
> + mptcp_rcv_space_adjust(msk, copied);
>
> release_sock(sk);
> return copied;
LGTM,
Acked-by: Paolo Abeni <pabeni@redhat.com>
Note that the first chunk mptcp_recvmsg() will conflict with other
pending changes ("mptcp: ignore unsupported msg flags"), but I guess
Mattbe can handle that ;) - likely no need to resubmit.
Thanks!
Paolo
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK
2021-04-19 2:53 ` [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK Yonglong Li
@ 2021-04-19 11:23 ` Paolo Abeni
0 siblings, 0 replies; 5+ messages in thread
From: Paolo Abeni @ 2021-04-19 11:23 UTC (permalink / raw)
To: Yonglong Li, mptcp
Cc: mathew.j.martineau, matthieu.baerts, fw, geliangtang, qitiepeng
On Mon, 2021-04-19 at 10:53 +0800, Yonglong Li wrote:
> Extend mptcp_connect tool with MSG_PEEK support and add a test case in
> mptcp_connect.sh that checks the data recvived from/after recv() with
> MSG_PEEK.
>
> Signed-off-by: Yonglong Li <liyonglong@chinatelecom.cn>
> ---
> tools/testing/selftests/net/mptcp/mptcp_connect.c | 48 +++++++++++++++++++++-
> tools/testing/selftests/net/mptcp/mptcp_connect.sh | 17 ++++++++
> 2 files changed, 63 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> index 2f207cf..d88e1fd 100644
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
> @@ -45,7 +45,14 @@ enum cfg_mode {
> CFG_MODE_SENDFILE,
> };
>
> +enum cfg_peek {
> + CFG_NONE_PEEK,
> + CFG_WITH_PEEK,
> + CFG_AFTER_PEEK,
> +};
> +
> static enum cfg_mode cfg_mode = CFG_MODE_POLL;
> +static enum cfg_peek cfg_peek = CFG_NONE_PEEK;
> static const char *cfg_host;
> static const char *cfg_port = "12000";
> static int cfg_sock_proto = IPPROTO_MPTCP;
> @@ -73,6 +80,8 @@ static void die_usage(void)
> fprintf(stderr, "\t-M mark -- set socket packet mark\n");
> fprintf(stderr, "\t-u -- check mptcp ulp\n");
> fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n");
> + fprintf(stderr,
> + "\t-P [saveWithPeek|saveAfterPeek] -- save data with/after MSG_PEEK form tcp socket\n");
> exit(1);
> }
>
> @@ -331,6 +340,8 @@ static size_t do_write(const int fd, char *buf, const size_t len)
>
> static ssize_t do_rnd_read(const int fd, char *buf, const size_t len)
> {
> + int ret = 0;
> + char tmp[16384];
> size_t cap = rand();
>
> cap &= 0xffff;
> @@ -340,7 +351,17 @@ static ssize_t do_rnd_read(const int fd, char *buf, const size_t len)
> else if (cap > len)
> cap = len;
>
> - return read(fd, buf, cap);
> + if (cfg_peek == CFG_WITH_PEEK) {
> + ret = recv(fd, buf, cap, MSG_PEEK);
> + ret = (ret < 0) ? ret : read(fd, tmp, ret);
> + } else if (cfg_peek == CFG_AFTER_PEEK) {
> + ret = recv(fd, buf, cap, MSG_PEEK);
> + ret = (ret < 0) ? ret : read(fd, buf, cap);
> + } else {
> + ret = read(fd, buf, cap);
> + }
> +
> + return ret;
> }
>
> static void set_nonblock(int fd)
> @@ -819,6 +840,26 @@ int parse_mode(const char *mode)
> return 0;
> }
>
> +int parse_peek(const char *mode)
> +{
> + if (!strcasecmp(mode, "saveWithPeek"))
> + return CFG_WITH_PEEK;
> + if (!strcasecmp(mode, "saveAfterPeek"))
> + return CFG_AFTER_PEEK;
> +
> + fprintf(stderr, "Unknown: %s\n", mode);
> + fprintf(stderr, "Supported MSG_PEEK mode are:\n");
> + fprintf(stderr,
> + "\t\t\"saveWithPeek\" - recv data with flags 'MSG_PEEK' and save the peek data into file\n");
> + fprintf(stderr,
> + "\t\t\"saveAfterPeek\" - read and save data into file after recv with flags 'MSG_PEEK'\n");
> +
> + die_usage();
> +
> + /* silence compiler warning */
> + return 0;
> +}
> +
> static int parse_int(const char *size)
> {
> unsigned long s;
> @@ -846,7 +887,7 @@ static void parse_opts(int argc, char **argv)
> {
> int c;
>
> - while ((c = getopt(argc, argv, "6jr:lp:s:hut:m:S:R:w:M:")) != -1) {
> + while ((c = getopt(argc, argv, "6jr:lp:s:hut:m:S:R:w:M:P:")) != -1) {
> switch (c) {
> case 'j':
> cfg_join = true;
> @@ -899,6 +940,9 @@ static void parse_opts(int argc, char **argv)
> case 'M':
> cfg_mark = strtol(optarg, NULL, 0);
> break;
> + case 'P':
> + cfg_peek = parse_peek(optarg);
> + break;
> }
> }
>
> diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
> index 385cdc9..319d166 100755
> --- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
> +++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
> @@ -23,6 +23,8 @@ rcvbuf=0
> options_log=true
> do_tcp=0
> filesize=0
> +peekmode=""
> +testpeek=false
>
> if [ $tc_loss -eq 100 ];then
> tc_loss=1%
> @@ -393,6 +395,10 @@ do_transfer()
> extra_args="$extra_args -m $testmode"
> fi
>
> + if $testpeek; then
> + extra_args="$extra_args -P $peekmode"
> + fi
> +
> if [ -n "$extra_args" ] && $options_log; then
> options_log=false
> echo "INFO: extra options: $extra_args"
> @@ -732,6 +738,17 @@ for sender in $ns1 $ns2 $ns3 $ns4;do
> run_tests "$ns4" $sender dead:beef:3::1
> done
>
> +testpeek=true
> +options_log=true
> +peekmode="saveAfterPeek"
> +run_tests_lo "$ns1" "$ns1" 10.0.1.1 1
> +run_tests_lo "$ns1" $sender dead:beef:1::1 1
> +
> +options_log=true
> +peekmode="saveAfterPeek"
> +run_tests_lo "$ns1" "$ns1" 10.0.1.1 1
> +run_tests_lo "$ns1" $sender dead:beef:1::1 1
> +
> time_end=$(date +%s)
> time_run=$((time_end-time_start))
LGTM! and to checkpatch, also!
Acked-by: Paolo Abeni <pabeni@redhat.com>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v4 1/2] mptcp: add MSG_PEEK support
2021-04-19 2:53 [PATCH v4 1/2] mptcp: add MSG_PEEK support Yonglong Li
2021-04-19 2:53 ` [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK Yonglong Li
2021-04-19 11:22 ` [PATCH v4 1/2] mptcp: add MSG_PEEK support Paolo Abeni
@ 2021-04-19 16:54 ` Matthieu Baerts
2 siblings, 0 replies; 5+ messages in thread
From: Matthieu Baerts @ 2021-04-19 16:54 UTC (permalink / raw)
To: Yonglong Li, Paolo Abeni
Cc: mathew.j.martineau, fw, geliangtang, qitiepeng, mptcp
Hi Yonglong, Paolo,
On 19/04/2021 04:53, Yonglong Li wrote:
> This patch adds support for MSG_PEEK flag. Packets are not removed
> from the receive_queue if MSG_PEEK set in recv() system call.
Thank you for the patches and the reviews!
Now in our tree:
- e7fc5d2f8302: mptcp: add MSG_PEEK support
- 3a43a9f8d6df: selftests: mptcp: add a test case for MSG_PEEK
- Results: 0bc569d1592d..41136bc7e8d8
Tests + export are in progress!
Cheers,
Matt
--
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-04-19 16:54 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-04-19 2:53 [PATCH v4 1/2] mptcp: add MSG_PEEK support Yonglong Li
2021-04-19 2:53 ` [PATCH v4 2/2] selftests: mptcp: add a test case for MSG_PEEK Yonglong Li
2021-04-19 11:23 ` Paolo Abeni
2021-04-19 11:22 ` [PATCH v4 1/2] mptcp: add MSG_PEEK support Paolo Abeni
2021-04-19 16:54 ` Matthieu Baerts
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