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Add devicemapper support for docker containers
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Copyright 2016 Google Inc. All Rights Reserved. | ||
| // | ||
| // 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 devicemapper | ||
|
|
||
| import ( | ||
| "os/exec" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/golang/glog" | ||
| ) | ||
|
|
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| // DmsetupClient is a low-level client for interacting with devicemapper via | ||
| // the dmsetup utility. | ||
| type DmsetupClient interface { | ||
| Table(deviceName string) ([]byte, error) | ||
| Message(deviceName string, sector int, message string) ([]byte, error) | ||
| Status(deviceName string) ([]byte, error) | ||
| } | ||
|
|
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| func NewDmsetupClient() DmsetupClient { | ||
| return &defaultDmsetupClient{} | ||
| } | ||
|
|
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| // defaultDmsetupClient implements the standard behavior for interacting with dmsetup. | ||
| type defaultDmsetupClient struct{} | ||
|
|
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| var _ DmsetupClient = &defaultDmsetupClient{} | ||
|
|
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| func (c *defaultDmsetupClient) Table(deviceName string) ([]byte, error) { | ||
| return c.dmsetup("table", deviceName) | ||
| } | ||
|
|
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| func (c *defaultDmsetupClient) Message(deviceName string, sector int, message string) ([]byte, error) { | ||
| return c.dmsetup("message", deviceName, strconv.Itoa(sector), message) | ||
| } | ||
|
|
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| func (c *defaultDmsetupClient) Status(deviceName string) ([]byte, error) { | ||
| return c.dmsetup("status", deviceName) | ||
| } | ||
|
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| func (*defaultDmsetupClient) dmsetup(args ...string) ([]byte, error) { | ||
| glog.V(5).Infof("running dmsetup %v", strings.Join(args, " ")) | ||
| return exec.Command("dmsetup", args...).Output() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // Copyright 2016 Google Inc. All Rights Reserved. | ||
| // | ||
| // 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. | ||
|
|
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| // Package devicemapper contains code for working with devicemapper | ||
| package devicemapper |
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