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Copy pathdisk-cache-config.go
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Copy pathdisk-cache-config.go
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117 lines (103 loc) · 3.06 KB
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/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
*
* 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 cmd
import (
"encoding/json"
"errors"
"path/filepath"
"strings"
"github.com/minio/minio/pkg/ellipses"
)
// CacheConfig represents cache config settings
type CacheConfig struct {
Drives []string `json:"drives"`
Expiry int `json:"expiry"`
MaxUse int `json:"maxuse"`
Exclude []string `json:"exclude"`
}
// UnmarshalJSON - implements JSON unmarshal interface for unmarshalling
// json entries for CacheConfig.
func (cfg *CacheConfig) UnmarshalJSON(data []byte) (err error) {
type Alias CacheConfig
var _cfg = &struct {
*Alias
}{
Alias: (*Alias)(cfg),
}
if err = json.Unmarshal(data, _cfg); err != nil {
return err
}
if _cfg.Expiry < 0 {
return errors.New("config expiry value should not be negative")
}
if _cfg.MaxUse < 0 {
return errors.New("config max use value should not be null or negative")
}
if _, err = parseCacheDrives(_cfg.Drives); err != nil {
return err
}
if _, err = parseCacheExcludes(_cfg.Exclude); err != nil {
return err
}
return nil
}
// Parses given cacheDrivesEnv and returns a list of cache drives.
func parseCacheDrives(drives []string) ([]string, error) {
if len(drives) == 0 {
return drives, nil
}
var endpoints []string
for _, d := range drives {
if ellipses.HasEllipses(d) {
s, err := parseCacheDrivePaths(d)
if err != nil {
return nil, err
}
endpoints = append(endpoints, s...)
} else {
endpoints = append(endpoints, d)
}
}
for _, d := range endpoints {
if !filepath.IsAbs(d) {
return nil, uiErrInvalidCacheDrivesValue(nil).Msg("cache dir should be absolute path: %s", d)
}
}
return endpoints, nil
}
// Parses all arguments and returns a slice of drive paths following the ellipses pattern.
func parseCacheDrivePaths(arg string) (ep []string, err error) {
patterns, perr := ellipses.FindEllipsesPatterns(arg)
if perr != nil {
return []string{}, uiErrInvalidCacheDrivesValue(nil).Msg(perr.Error())
}
for _, lbls := range patterns.Expand() {
ep = append(ep, strings.Join(lbls, ""))
}
return ep, nil
}
// Parses given cacheExcludesEnv and returns a list of cache exclude patterns.
func parseCacheExcludes(excludes []string) ([]string, error) {
for _, e := range excludes {
if len(e) == 0 {
return nil, uiErrInvalidCacheExcludesValue(nil).Msg("cache exclude path (%s) cannot be empty", e)
}
if hasPrefix(e, slashSeparator) {
return nil, uiErrInvalidCacheExcludesValue(nil).Msg("cache exclude pattern (%s) cannot start with / as prefix", e)
}
}
return excludes, nil
}