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Merge pull request #249 from Nordix/sriov-token-server-elem
add sriov token server chain element
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // Copyright (c) 2021 Nordix Foundation. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at: | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package token | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
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| "github.com/networkservicemesh/api/pkg/api/networkservice" | ||
| ) | ||
|
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| type tokenElement struct { | ||
| lock sync.Mutex | ||
| tokens map[string][]string // tokens[tokenName] -> []tokenIDs | ||
| connectionsByTokens map[string]string // connectionsByTokens[tokenID] -> connectionID | ||
| tokensByConnections map[string]string // tokensByConnections[connectionID] -> tokenID | ||
| } | ||
|
|
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| type tokenConfig interface { | ||
| assign(tokenName string, conn *networkservice.Connection) (tokenID string) | ||
| release(conn *networkservice.Connection) | ||
| } | ||
|
|
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| func createTokenElement(allocatableTokens map[string][]string) tokenConfig { | ||
| return &tokenElement{tokens: allocatableTokens, | ||
| connectionsByTokens: map[string]string{}, | ||
| tokensByConnections: map[string]string{}} | ||
| } | ||
|
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| func (c *tokenElement) assign(tokenName string, conn *networkservice.Connection) (tokenID string) { | ||
| c.lock.Lock() | ||
| defer c.lock.Unlock() | ||
|
|
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| var ok bool | ||
| if tokenID, ok = c.tokensByConnections[conn.GetId()]; ok { | ||
| return tokenID | ||
| } | ||
|
|
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| for _, tokenID = range c.tokens[tokenName] { | ||
| if _, ok := c.connectionsByTokens[tokenID]; !ok { | ||
| c.connectionsByTokens[tokenID] = conn.GetId() | ||
| c.tokensByConnections[conn.GetId()] = tokenID | ||
| break | ||
| } else { | ||
| tokenID = "" | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
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| func (c *tokenElement) release(conn *networkservice.Connection) { | ||
| c.lock.Lock() | ||
| defer c.lock.Unlock() | ||
|
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| if tokenID, ok := c.tokensByConnections[conn.GetId()]; ok { | ||
| delete(c.connectionsByTokens, tokenID) | ||
| delete(c.tokensByConnections, conn.GetId()) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| // Copyright (c) 2021 Nordix Foundation. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at: | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package token | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
|
|
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| "github.com/golang/protobuf/ptypes/empty" | ||
| "github.com/networkservicemesh/api/pkg/api/networkservice" | ||
| "github.com/networkservicemesh/api/pkg/api/networkservice/mechanisms/kernel" | ||
| "github.com/networkservicemesh/sdk/pkg/networkservice/core/next" | ||
|
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| "github.com/networkservicemesh/sdk-sriov/pkg/networkservice/common/resourcepool" | ||
| "github.com/networkservicemesh/sdk-sriov/pkg/tools/tokens" | ||
| ) | ||
|
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| type tokenServer struct { | ||
| tokenName string | ||
| config tokenConfig | ||
| } | ||
|
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| // NewServer returns a new token server chain element for the given tokenKey | ||
| func NewServer(tokenKey string) networkservice.NetworkServiceServer { | ||
| return &tokenServer{ | ||
| tokenName: tokenKey, | ||
| config: createTokenElement(map[string][]string{ | ||
| tokenKey: tokens.FromEnv(os.Environ())[tokenKey], | ||
| }), | ||
| } | ||
| } | ||
|
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| func (s *tokenServer) Request(ctx context.Context, request *networkservice.NetworkServiceRequest) (*networkservice.Connection, error) { | ||
| var tokenID string | ||
| if mechanism := kernel.ToMechanism(request.GetConnection().GetMechanism()); mechanism != nil || mechanism.Parameters[resourcepool.TokenIDKey] == "" { | ||
| tokenID = s.config.assign(s.tokenName, request.GetConnection()) | ||
| if tokenID != "" { | ||
| mechanism.Parameters[resourcepool.TokenIDKey] = tokenID | ||
| } | ||
| } | ||
|
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| isEstablished := request.GetConnection().GetNextPathSegment() != nil | ||
| conn, err := next.Server(ctx).Request(ctx, request) | ||
| if err != nil && tokenID != "" && !isEstablished { | ||
| s.config.release(request.GetConnection()) | ||
| } | ||
|
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| return conn, err | ||
| } | ||
|
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| func (s *tokenServer) Close(ctx context.Context, conn *networkservice.Connection) (*empty.Empty, error) { | ||
| if mechanism := kernel.ToMechanism(conn.GetMechanism()); mechanism != nil { | ||
| s.config.release(conn) | ||
| } | ||
| return next.Server(ctx).Close(ctx, conn) | ||
| } |
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