2017-01-04 02:44:32 +00:00
|
|
|
// Copyright 2017 clair authors
|
|
|
|
//
|
|
|
|
// 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 vulnmdsrc exposes functions to dynamically register vulnerability
|
|
|
|
// metadata sources used to update a Clair database.
|
|
|
|
package vulnmdsrc
|
|
|
|
|
|
|
|
import (
|
2017-01-13 07:33:19 +00:00
|
|
|
"sync"
|
|
|
|
|
2017-01-04 02:44:32 +00:00
|
|
|
"github.com/coreos/clair/database"
|
|
|
|
)
|
|
|
|
|
2017-01-13 07:33:19 +00:00
|
|
|
var (
|
|
|
|
appendersM sync.RWMutex
|
|
|
|
appenders = make(map[string]Appender)
|
|
|
|
)
|
2017-01-04 02:44:32 +00:00
|
|
|
|
|
|
|
// AppendFunc is the type of a callback provided to an Appender.
|
2017-01-19 18:42:37 +00:00
|
|
|
type AppendFunc func(metadataKey string, metadata interface{}, severity database.Severity)
|
2017-01-04 02:44:32 +00:00
|
|
|
|
|
|
|
// Appender represents anything that can fetch vulnerability metadata and
|
|
|
|
// append it to a Vulnerability.
|
|
|
|
type Appender interface {
|
|
|
|
// BuildCache loads metadata into memory such that it can be quickly accessed
|
|
|
|
// for future calls to Append.
|
|
|
|
BuildCache(database.Datastore) error
|
|
|
|
|
|
|
|
// AddMetadata adds metadata to the given database.Vulnerability.
|
|
|
|
// It is expected that the fetcher uses .Lock.Lock() when manipulating the Metadata map.
|
|
|
|
// Append
|
|
|
|
Append(vulnName string, callback AppendFunc) error
|
|
|
|
|
|
|
|
// PurgeCache deallocates metadata from memory after all calls to Append are
|
|
|
|
// finished.
|
|
|
|
PurgeCache()
|
|
|
|
|
|
|
|
// Clean deletes any allocated resources.
|
|
|
|
// It is invoked when Clair stops.
|
|
|
|
Clean()
|
|
|
|
}
|
|
|
|
|
|
|
|
// RegisterAppender makes an Appender available by the provided name.
|
2017-01-13 07:33:19 +00:00
|
|
|
//
|
|
|
|
// If called twice with the same name, the name is blank, or if the provided
|
|
|
|
// Appender is nil, this function panics.
|
2017-01-04 02:44:32 +00:00
|
|
|
func RegisterAppender(name string, a Appender) {
|
|
|
|
if name == "" {
|
2017-01-13 07:33:19 +00:00
|
|
|
panic("vulnmdsrc: could not register an Appender with an empty name")
|
2017-01-04 02:44:32 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if a == nil {
|
|
|
|
panic("vulnmdsrc: could not register a nil Appender")
|
|
|
|
}
|
|
|
|
|
2017-01-13 07:33:19 +00:00
|
|
|
appendersM.Lock()
|
|
|
|
defer appendersM.Unlock()
|
|
|
|
|
|
|
|
if _, dup := appenders[name]; dup {
|
2017-01-04 02:44:32 +00:00
|
|
|
panic("vulnmdsrc: RegisterAppender called twice for " + name)
|
|
|
|
}
|
|
|
|
|
2017-01-13 07:33:19 +00:00
|
|
|
appenders[name] = a
|
|
|
|
}
|
|
|
|
|
|
|
|
// Appenders returns the list of the registered Appenders.
|
|
|
|
func Appenders() map[string]Appender {
|
|
|
|
appendersM.RLock()
|
|
|
|
defer appendersM.RUnlock()
|
|
|
|
|
|
|
|
ret := make(map[string]Appender)
|
|
|
|
for k, v := range appenders {
|
|
|
|
ret[k] = v
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret
|
2017-01-04 02:44:32 +00:00
|
|
|
}
|
2019-01-09 21:16:17 +00:00
|
|
|
|
|
|
|
// CleanAll is a utility function that calls Clean() on every registered
|
|
|
|
// Appender.
|
|
|
|
func CleanAll() {
|
|
|
|
for _, appender := range Appenders() {
|
|
|
|
appender.Clean()
|
|
|
|
}
|
|
|
|
}
|