2021-10-31 16:00:02 +00:00
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2022-07-20 16:57:58 -07:00
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2021-10-31 16:00:02 +00:00
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2022-05-23 16:17:06 +00:00
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2021-10-31 16:00:02 +00:00
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2021-10-31 16:00:04 +00:00
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2021-10-31 16:00:02 +00:00
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amt: use workqueue for gateway side message handling
There are some synchronization issues(amt->status, amt->req_cnt, etc)
if the interface is in gateway mode because gateway message handlers
are processed concurrently.
This applies a work queue for processing these messages instead of
expanding the locking context.
So, the purposes of this patch are to fix exist race conditions and to make
gateway to be able to validate a gateway status more correctly.
When the AMT gateway interface is created, it tries to establish to relay.
The establishment step looks stateless, but it should be managed well.
In order to handle messages in the gateway, it saves the current
status(i.e. AMT_STATUS_XXX).
This patch makes gateway code to be worked with a single thread.
Now, all messages except the multicast are triggered(received or
delay expired), and these messages will be stored in the event
queue(amt->events).
Then, the single worker processes stored messages asynchronously one
by one.
The multicast data message type will be still processed immediately.
Now, amt->lock is only needed to access the event queue(amt->events)
if an interface is the gateway mode.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-07-17 16:09:03 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:02 +00:00
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2021-10-31 16:00:04 +00:00
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2021-10-31 16:00:02 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:04 +00:00
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amt: use workqueue for gateway side message handling
There are some synchronization issues(amt->status, amt->req_cnt, etc)
if the interface is in gateway mode because gateway message handlers
are processed concurrently.
This applies a work queue for processing these messages instead of
expanding the locking context.
So, the purposes of this patch are to fix exist race conditions and to make
gateway to be able to validate a gateway status more correctly.
When the AMT gateway interface is created, it tries to establish to relay.
The establishment step looks stateless, but it should be managed well.
In order to handle messages in the gateway, it saves the current
status(i.e. AMT_STATUS_XXX).
This patch makes gateway code to be worked with a single thread.
Now, all messages except the multicast are triggered(received or
delay expired), and these messages will be stored in the event
queue(amt->events).
Then, the single worker processes stored messages asynchronously one
by one.
The multicast data message type will be still processed immediately.
Now, amt->lock is only needed to access the event queue(amt->events)
if an interface is the gateway mode.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-07-17 16:09:03 +00:00
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2021-10-31 16:00:02 +00:00
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amt: use workqueue for gateway side message handling
There are some synchronization issues(amt->status, amt->req_cnt, etc)
if the interface is in gateway mode because gateway message handlers
are processed concurrently.
This applies a work queue for processing these messages instead of
expanding the locking context.
So, the purposes of this patch are to fix exist race conditions and to make
gateway to be able to validate a gateway status more correctly.
When the AMT gateway interface is created, it tries to establish to relay.
The establishment step looks stateless, but it should be managed well.
In order to handle messages in the gateway, it saves the current
status(i.e. AMT_STATUS_XXX).
This patch makes gateway code to be worked with a single thread.
Now, all messages except the multicast are triggered(received or
delay expired), and these messages will be stored in the event
queue(amt->events).
Then, the single worker processes stored messages asynchronously one
by one.
The multicast data message type will be still processed immediately.
Now, amt->lock is only needed to access the event queue(amt->events)
if an interface is the gateway mode.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-07-17 16:09:03 +00:00
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2021-10-31 16:00:02 +00:00
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2026-05-02 03:13:05 +00:00
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2021-10-31 16:00:02 +00:00
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amt: use workqueue for gateway side message handling
There are some synchronization issues(amt->status, amt->req_cnt, etc)
if the interface is in gateway mode because gateway message handlers
are processed concurrently.
This applies a work queue for processing these messages instead of
expanding the locking context.
So, the purposes of this patch are to fix exist race conditions and to make
gateway to be able to validate a gateway status more correctly.
When the AMT gateway interface is created, it tries to establish to relay.
The establishment step looks stateless, but it should be managed well.
In order to handle messages in the gateway, it saves the current
status(i.e. AMT_STATUS_XXX).
This patch makes gateway code to be worked with a single thread.
Now, all messages except the multicast are triggered(received or
delay expired), and these messages will be stored in the event
queue(amt->events).
Then, the single worker processes stored messages asynchronously one
by one.
The multicast data message type will be still processed immediately.
Now, amt->lock is only needed to access the event queue(amt->events)
if an interface is the gateway mode.
Fixes: cbc21dc1cfe9 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2022-07-17 16:09:03 +00:00
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2021-10-31 16:00:02 +00:00
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2021-10-31 16:00:04 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:05 +00:00
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2021-10-31 16:00:04 +00:00
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2021-10-31 16:00:02 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:02 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:02 +00:00
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amt: add data plane of amt interface
Before forwarding multicast traffic, the amt interface establishes between
gateway and relay. In order to establish, amt defined some message type
and those message flow looks like the below.
Gateway Relay
------- -----
: Request :
[1] | N |
|---------------------->|
| Membership Query | [2]
| N,MAC,gADDR,gPORT |
|<======================|
[3] | Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR,gPORT |<-----------------() |
| *IP Packet(S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
~ ~
~ Request ~
[4] | N' |
|---------------------->|
| Membership Query | [5]
| N',MAC',gADDR',gPORT' |
|<======================|
[6] | |
| Teardown |
| N,MAC,gADDR,gPORT |
|---------------------->|
| | [7]
| Membership Update |
| ({G:INCLUDE({S})}) |
|======================>|
| |
---------------------:-----------------------:---------------------
| | | |
| | *Multicast Data | *IP Packet(S,G) |
| | gADDR',gPORT' |<-----------------() |
| *IP Packet (S,G) |<======================| |
| ()<-----------------| | |
| | | |
---------------------:-----------------------:---------------------
| |
: :
1. Discovery
- Sent by Gateway to Relay
- To find Relay unique ip address
2. Advertisement
- Sent by Relay to Gateway
- Contains the unique IP address
3. Request
- Sent by Gateway to Relay
- Solicit to receive 'Query' message.
4. Query
- Sent by Relay to Gateway
- Contains General Query message.
5. Update
- Sent by Gateway to Relay
- Contains report message.
6. Multicast Data
- Sent by Relay to Gateway
- encapsulated multicast traffic.
7. Teardown
- Not supported at this time.
Except for the Teardown message, it supports all messages.
In the next patch, IGMP/MLD logic will be added.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-31 16:00:03 +00:00
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2021-10-31 16:00:02 +00:00
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