* [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation
@ 2022-11-18 8:18 Ji Rongfeng
2022-11-24 0:18 ` Daniel Borkmann
0 siblings, 1 reply; 5+ messages in thread
From: Ji Rongfeng @ 2022-11-18 8:18 UTC (permalink / raw)
To: bpf, linux-kernel
Cc: ast, daniel, andrii, martin.lau, song, yhs, john.fastabend,
kpsingh, sdf, haoluo, jolsa, joannelkoong, kuifeng, lorenzo,
maximmi, quentin, Ji Rongfeng
* append missing optnames to the end
* simplify bpf_getsockopt()'s doc
Signed-off-by: Ji Rongfeng <SikoJobs@outlook.com>
---
include/uapi/linux/bpf.h | 20 ++++++++++++--------
tools/include/uapi/linux/bpf.h | 20 ++++++++++++--------
2 files changed, 24 insertions(+), 16 deletions(-)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 51b9aa640ad2..14f29d95ea71 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -2576,14 +2576,19 @@ union bpf_attr {
* * **SOL_SOCKET**, which supports the following *optname*\ s:
* **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
- * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
+ * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
+ * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
* * **IPPROTO_TCP**, which supports the following *optname*\ s:
* **TCP_CONGESTION**, **TCP_BPF_IW**,
* **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
* **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
- * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**.
+ * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**,
+ * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
+ * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
+ * **TCP_BPF_RTO_MIN**.
* * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
+ * * **IPPROTO_IPV6**, which supports the following *optname*\ s:
+ * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
* Return
* 0 on success, or a negative error in case of failure.
*
@@ -2800,12 +2805,11 @@ union bpf_attr {
* and **BPF_CGROUP_INET6_CONNECT**.
*
* This helper actually implements a subset of **getsockopt()**.
- * It supports the following *level*\ s:
+ * It supports the same set of *optname*\ s that supported by
+ * **bpf_setsockopt**\ () helper with a few exceptions:
*
- * * **IPPROTO_TCP**, which supports *optname*
- * **TCP_CONGESTION**.
- * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
+ * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
+ * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
* Return
* 0 on success, or a negative error in case of failure.
*
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 51b9aa640ad2..14f29d95ea71 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2576,14 +2576,19 @@ union bpf_attr {
* * **SOL_SOCKET**, which supports the following *optname*\ s:
* **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
- * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
+ * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
+ * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
* * **IPPROTO_TCP**, which supports the following *optname*\ s:
* **TCP_CONGESTION**, **TCP_BPF_IW**,
* **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
* **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
- * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**.
+ * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**,
+ * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
+ * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
+ * **TCP_BPF_RTO_MIN**.
* * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
+ * * **IPPROTO_IPV6**, which supports the following *optname*\ s:
+ * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
* Return
* 0 on success, or a negative error in case of failure.
*
@@ -2800,12 +2805,11 @@ union bpf_attr {
* and **BPF_CGROUP_INET6_CONNECT**.
*
* This helper actually implements a subset of **getsockopt()**.
- * It supports the following *level*\ s:
+ * It supports the same set of *optname*\ s that supported by
+ * **bpf_setsockopt**\ () helper with a few exceptions:
*
- * * **IPPROTO_TCP**, which supports *optname*
- * **TCP_CONGESTION**.
- * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
- * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
+ * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
+ * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
* Return
* 0 on success, or a negative error in case of failure.
*
--
2.30.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation
2022-11-18 8:18 [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation Ji Rongfeng
@ 2022-11-24 0:18 ` Daniel Borkmann
2022-11-24 0:40 ` Martin KaFai Lau
0 siblings, 1 reply; 5+ messages in thread
From: Daniel Borkmann @ 2022-11-24 0:18 UTC (permalink / raw)
To: Ji Rongfeng, bpf, linux-kernel
Cc: ast, andrii, martin.lau, song, yhs, john.fastabend, kpsingh, sdf,
haoluo, jolsa, joannelkoong, kuifeng, lorenzo, maximmi, quentin
On 11/18/22 9:18 AM, Ji Rongfeng wrote:
> * append missing optnames to the end
> * simplify bpf_getsockopt()'s doc
>
> Signed-off-by: Ji Rongfeng <SikoJobs@outlook.com>
> ---
> include/uapi/linux/bpf.h | 20 ++++++++++++--------
> tools/include/uapi/linux/bpf.h | 20 ++++++++++++--------
> 2 files changed, 24 insertions(+), 16 deletions(-)
>
> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> index 51b9aa640ad2..14f29d95ea71 100644
> --- a/include/uapi/linux/bpf.h
> +++ b/include/uapi/linux/bpf.h
> @@ -2576,14 +2576,19 @@ union bpf_attr {
> * * **SOL_SOCKET**, which supports the following *optname*\ s:
> * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
> * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
> - * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
> + * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
> + * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
> * * **IPPROTO_TCP**, which supports the following *optname*\ s:
> * **TCP_CONGESTION**, **TCP_BPF_IW**,
> * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
> * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
> - * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**.
> + * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**,
> + * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
> + * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
> + * **TCP_BPF_RTO_MIN**.
> * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
> - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
> + * * **IPPROTO_IPV6**, which supports the following *optname*\ s:
> + * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
> * Return
> * 0 on success, or a negative error in case of failure.
> *
> @@ -2800,12 +2805,11 @@ union bpf_attr {
> * and **BPF_CGROUP_INET6_CONNECT**.
> *
> * This helper actually implements a subset of **getsockopt()**.
> - * It supports the following *level*\ s:
> + * It supports the same set of *optname*\ s that supported by
nit: that is supported by
> + * **bpf_setsockopt**\ () helper with a few exceptions:
> *
> - * * **IPPROTO_TCP**, which supports *optname*
> - * **TCP_CONGESTION**.
> - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
> - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
> + * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
> + * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
I think from a user PoV the above is a bit hard to follow, maybe take Martin's
earlier feedback into account and add a proper sentence; it will be much easier
to understand.
> * Return
> * 0 on success, or a negative error in case of failure.
> *
[...]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation
2022-11-24 0:18 ` Daniel Borkmann
@ 2022-11-24 0:40 ` Martin KaFai Lau
2022-11-27 3:27 ` Ji Rongfeng
[not found] ` <7ede0b02-6fe6-f51e-eb3c-bf6dab63aa21@outlook.com>
0 siblings, 2 replies; 5+ messages in thread
From: Martin KaFai Lau @ 2022-11-24 0:40 UTC (permalink / raw)
To: Daniel Borkmann, Ji Rongfeng
Cc: ast, andrii, song, yhs, john.fastabend, kpsingh, sdf, haoluo,
jolsa, joannelkoong, kuifeng, lorenzo, maximmi, quentin, bpf,
linux-kernel
On 11/23/22 4:18 PM, Daniel Borkmann wrote:
> On 11/18/22 9:18 AM, Ji Rongfeng wrote:
>> * append missing optnames to the end
>> * simplify bpf_getsockopt()'s doc
>>
>> Signed-off-by: Ji Rongfeng <SikoJobs@outlook.com>
>> ---
>> include/uapi/linux/bpf.h | 20 ++++++++++++--------
>> tools/include/uapi/linux/bpf.h | 20 ++++++++++++--------
>> 2 files changed, 24 insertions(+), 16 deletions(-)
>>
>> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
>> index 51b9aa640ad2..14f29d95ea71 100644
>> --- a/include/uapi/linux/bpf.h
>> +++ b/include/uapi/linux/bpf.h
>> @@ -2576,14 +2576,19 @@ union bpf_attr {
>> * * **SOL_SOCKET**, which supports the following *optname*\ s:
>> * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
>> * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
>> - * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
>> + * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
>> + * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
>> * * **IPPROTO_TCP**, which supports the following *optname*\ s:
>> * **TCP_CONGESTION**, **TCP_BPF_IW**,
>> * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
>> * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
>> - * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**.
>> + * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**, **TCP_NOTSENT_LOWAT**,
>> + * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
>> + * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
>> + * **TCP_BPF_RTO_MIN**.
>> * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>> - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
>> + * * **IPPROTO_IPV6**, which supports the following *optname*\ s:
>> + * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
>> * Return
>> * 0 on success, or a negative error in case of failure.
>> *
>> @@ -2800,12 +2805,11 @@ union bpf_attr {
>> * and **BPF_CGROUP_INET6_CONNECT**.
>> *
>> * This helper actually implements a subset of **getsockopt()**.
>> - * It supports the following *level*\ s:
>> + * It supports the same set of *optname*\ s that supported by
>
> nit: that is supported by
>
>> + * **bpf_setsockopt**\ () helper with a few exceptions:
>> *
>> - * * **IPPROTO_TCP**, which supports *optname*
>> - * **TCP_CONGESTION**.
>> - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>> - * * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
>> + * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
>> + * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
>
> I think from a user PoV the above is a bit hard to follow, maybe take Martin's
> earlier feedback into account and add a proper sentence; it will be much easier
> to understand.
+1 Made the change and also fixed TCP_SAVED_SYNC with s/SYNC/SYN/ while
applying. Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation
2022-11-24 0:40 ` Martin KaFai Lau
@ 2022-11-27 3:27 ` Ji Rongfeng
[not found] ` <7ede0b02-6fe6-f51e-eb3c-bf6dab63aa21@outlook.com>
1 sibling, 0 replies; 5+ messages in thread
From: Ji Rongfeng @ 2022-11-27 3:27 UTC (permalink / raw)
To: Martin KaFai Lau, Daniel Borkmann
Cc: ast, andrii, song, yhs, john.fastabend, kpsingh, sdf, haoluo,
jolsa, joannelkoong, kuifeng, lorenzo, maximmi, quentin, bpf,
linux-kernel
On 2022/11/24 8:40, Martin KaFai Lau wrote:
> On 11/23/22 4:18 PM, Daniel Borkmann wrote:
>> On 11/18/22 9:18 AM, Ji Rongfeng wrote:
>>> * append missing optnames to the end
>>> * simplify bpf_getsockopt()'s doc
>>>
>>> Signed-off-by: Ji Rongfeng <SikoJobs@outlook.com>
>>> ---
>>> include/uapi/linux/bpf.h | 20 ++++++++++++--------
>>> tools/include/uapi/linux/bpf.h | 20 ++++++++++++--------
>>> 2 files changed, 24 insertions(+), 16 deletions(-)
>>>
>>> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
>>> index 51b9aa640ad2..14f29d95ea71 100644
>>> --- a/include/uapi/linux/bpf.h
>>> +++ b/include/uapi/linux/bpf.h
>>> @@ -2576,14 +2576,19 @@ union bpf_attr {
>>> * * **SOL_SOCKET**, which supports the following
>>> *optname*\ s:
>>> * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
>>> * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
>>> - * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
>>> + * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
>>> + * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
>>> * * **IPPROTO_TCP**, which supports the following
>>> *optname*\ s:
>>> * **TCP_CONGESTION**, **TCP_BPF_IW**,
>>> * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
>>> * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
>>> - * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**,
>>> **TCP_NOTSENT_LOWAT**.
>>> + * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**,
>>> **TCP_NOTSENT_LOWAT**,
>>> + * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
>>> + * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
>>> + * **TCP_BPF_RTO_MIN**.
>>> * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>>> - * * **IPPROTO_IPV6**, which supports *optname*
>>> **IPV6_TCLASS**.
>>> + * * **IPPROTO_IPV6**, which supports the following
>>> *optname*\ s:
>>> + * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
>>> * Return
>>> * 0 on success, or a negative error in case of failure.
>>> *
>>> @@ -2800,12 +2805,11 @@ union bpf_attr {
>>> * and **BPF_CGROUP_INET6_CONNECT**.
>>> *
>>> * This helper actually implements a subset of
>>> **getsockopt()**.
>>> - * It supports the following *level*\ s:
>>> + * It supports the same set of *optname*\ s that supported by
>>
>> nit: that is supported by
>>
>>> + * **bpf_setsockopt**\ () helper with a few exceptions:
>>> *
>>> - * * **IPPROTO_TCP**, which supports *optname*
>>> - * **TCP_CONGESTION**.
>>> - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>>> - * * **IPPROTO_IPV6**, which supports *optname*
>>> **IPV6_TCLASS**.
>>> + * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
>>> + * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
>>
>> I think from a user PoV the above is a bit hard to follow, maybe take
>> Martin's
>> earlier feedback into account and add a proper sentence; it will be
>> much easier
>> to understand.
>
> +1 Made the change and also fixed TCP_SAVED_SYNC with s/SYNC/SYN/
> while applying. Thanks!
Thanks for the helpful reviews. I chose the form of lists was because we
could
append more optnames easily in the future. But I believe it's not late
to apply
that form when we really need it : )
In my opinion, this patch doesn't contain any new feature, but just a
kind of fix
to the documentation, according to the corresponding code in the bpf tree,
which hasn't been modified yet in the bpf-next tree. So I targeted the
former,
as this patch could be useful there. Please let me know if there's any
customary
rules outside bpf_devel_QA. Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation
[not found] ` <7ede0b02-6fe6-f51e-eb3c-bf6dab63aa21@outlook.com>
@ 2022-11-29 14:14 ` Ji Rongfeng
0 siblings, 0 replies; 5+ messages in thread
From: Ji Rongfeng @ 2022-11-29 14:14 UTC (permalink / raw)
To: Martin KaFai Lau, Daniel Borkmann
Cc: ast, andrii, song, yhs, john.fastabend, kpsingh, sdf, haoluo,
jolsa, joannelkoong, kuifeng, lorenzo, maximmi, quentin, bpf,
linux-kernel
On 2022/11/27 11:27, Ji Rongfeng wrote:
> On 2022/11/24 8:40, Martin KaFai Lau wrote:
>> On 11/23/22 4:18 PM, Daniel Borkmann wrote:
>>> On 11/18/22 9:18 AM, Ji Rongfeng wrote:
>>>> * append missing optnames to the end
>>>> * simplify bpf_getsockopt()'s doc
>>>>
>>>> Signed-off-by: Ji Rongfeng <SikoJobs@outlook.com>
>>>> ---
>>>> include/uapi/linux/bpf.h | 20 ++++++++++++--------
>>>> tools/include/uapi/linux/bpf.h | 20 ++++++++++++--------
>>>> 2 files changed, 24 insertions(+), 16 deletions(-)
>>>>
>>>> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
>>>> index 51b9aa640ad2..14f29d95ea71 100644
>>>> --- a/include/uapi/linux/bpf.h
>>>> +++ b/include/uapi/linux/bpf.h
>>>> @@ -2576,14 +2576,19 @@ union bpf_attr {
>>>> * * **SOL_SOCKET**, which supports the following
>>>> *optname*\ s:
>>>> * **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
>>>> * **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
>>>> - * **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
>>>> + * **SO_BINDTODEVICE**, **SO_KEEPALIVE**, **SO_REUSEADDR**,
>>>> + * **SO_REUSEPORT**, **SO_BINDTOIFINDEX**, **SO_TXREHASH**.
>>>> * * **IPPROTO_TCP**, which supports the following
>>>> *optname*\ s:
>>>> * **TCP_CONGESTION**, **TCP_BPF_IW**,
>>>> * **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
>>>> * **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
>>>> - * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**,
>>>> **TCP_NOTSENT_LOWAT**.
>>>> + * **TCP_SYNCNT**, **TCP_USER_TIMEOUT**,
>>>> **TCP_NOTSENT_LOWAT**,
>>>> + * **TCP_NODELAY**, **TCP_MAXSEG**, **TCP_WINDOW_CLAMP**,
>>>> + * **TCP_THIN_LINEAR_TIMEOUTS**, **TCP_BPF_DELACK_MAX**,
>>>> + * **TCP_BPF_RTO_MIN**.
>>>> * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>>>> - * * **IPPROTO_IPV6**, which supports *optname*
>>>> **IPV6_TCLASS**.
>>>> + * * **IPPROTO_IPV6**, which supports the following
>>>> *optname*\ s:
>>>> + * **IPV6_TCLASS**, **IPV6_AUTOFLOWLABEL**.
>>>> * Return
>>>> * 0 on success, or a negative error in case of failure.
>>>> *
>>>> @@ -2800,12 +2805,11 @@ union bpf_attr {
>>>> * and **BPF_CGROUP_INET6_CONNECT**.
>>>> *
>>>> * This helper actually implements a subset of
>>>> **getsockopt()**.
>>>> - * It supports the following *level*\ s:
>>>> + * It supports the same set of *optname*\ s that supported by
>>>
>>> nit: that is supported by
>>>
>>>> + * **bpf_setsockopt**\ () helper with a few exceptions:
>>>> *
>>>> - * * **IPPROTO_TCP**, which supports *optname*
>>>> - * **TCP_CONGESTION**.
>>>> - * * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
>>>> - * * **IPPROTO_IPV6**, which supports *optname*
>>>> **IPV6_TCLASS**.
>>>> + * * **bpf_setsockopt**\ () helper only: **TCP_BPF_***.
>>>> + * * **bpf_getsockopt**\ () helper only: **TCP_SAVED_SYNC**.
>>>
>>> I think from a user PoV the above is a bit hard to follow, maybe take
>>> Martin's
>>> earlier feedback into account and add a proper sentence; it will be
>>> much easier
>>> to understand.
>>
>> +1 Made the change and also fixed TCP_SAVED_SYNC with s/SYNC/SYN/
>> while applying. Thanks!
>
> Thanks for the helpful reviews. I chose the form of lists was because we
> could
> append more optnames easily in the future. But I believe it's not late
> to apply
> that form when we really need it : )
>
> In my opinion, this patch doesn't contain any new feature, but just a
new features
> kind of fix
> to the documentation, according to the corresponding code in the bpf tree,
> which hasn't been modified yet in the bpf-next tree. So I targeted the
> former,
> as this patch could be useful there. Please let me know if there's any
if there're
> customary
> rules outside bpf_devel_QA. Thanks!
I just found that SO_BINDTODEVICE is bpf_setsockopt() only. I checked
sock_getbindtodevice() and there's nothing special comparing with
sock_setbindtodevice(), except "down_read(&devnet_rename_sem);" and
"up_read(&devnet_rename_sem);". Martin once wrote:
> The only exception is SO_BINDTODEVICE because it needs to acquire a
> blocking lock. Thus, SO_BINDTODEVICE is not supported.
Were you referring to "down_read(&devnet_rename_sem);"? Seems it's not
acquiring a blocking lock. Maybe "devnet_rename_sem" has been locked for
writing somewhere in bpf before? Please let me know. Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-11-29 14:17 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-11-18 8:18 [PATCH bpf v2] bpf: Update bpf_{g,s}etsockopt() documentation Ji Rongfeng
2022-11-24 0:18 ` Daniel Borkmann
2022-11-24 0:40 ` Martin KaFai Lau
2022-11-27 3:27 ` Ji Rongfeng
[not found] ` <7ede0b02-6fe6-f51e-eb3c-bf6dab63aa21@outlook.com>
2022-11-29 14:14 ` Ji Rongfeng
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