mirror of https://github.com/minio/minio.git
128 lines
3.4 KiB
Go
128 lines
3.4 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cache
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import (
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"encoding/json"
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"errors"
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"path/filepath"
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"strings"
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"github.com/minio/minio/cmd/config"
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"github.com/minio/minio/pkg/ellipses"
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)
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// Config represents cache config settings
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type Config struct {
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Enabled bool `json:"-"`
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Drives []string `json:"drives"`
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Expiry int `json:"expiry"`
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MaxUse int `json:"maxuse"`
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Quota int `json:"quota"`
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Exclude []string `json:"exclude"`
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}
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// UnmarshalJSON - implements JSON unmarshal interface for unmarshalling
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// json entries for CacheConfig.
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func (cfg *Config) UnmarshalJSON(data []byte) (err error) {
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type Alias Config
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var _cfg = &struct {
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*Alias
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}{
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Alias: (*Alias)(cfg),
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}
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if err = json.Unmarshal(data, _cfg); err != nil {
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return err
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}
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if _cfg.Expiry < 0 {
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return errors.New("config expiry value should not be negative")
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}
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if _cfg.MaxUse < 0 {
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return errors.New("config max use value should not be null or negative")
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}
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if _cfg.Quota < 0 {
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return errors.New("config quota value should not be null or negative")
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}
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if _, err = parseCacheDrives(_cfg.Drives); err != nil {
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return err
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}
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if _, err = parseCacheExcludes(_cfg.Exclude); err != nil {
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return err
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}
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return nil
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}
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// Parses given cacheDrivesEnv and returns a list of cache drives.
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func parseCacheDrives(drives []string) ([]string, error) {
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if len(drives) == 0 {
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return drives, nil
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}
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var endpoints []string
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for _, d := range drives {
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if ellipses.HasEllipses(d) {
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s, err := parseCacheDrivePaths(d)
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if err != nil {
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return nil, err
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}
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endpoints = append(endpoints, s...)
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} else {
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endpoints = append(endpoints, d)
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}
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}
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for _, d := range endpoints {
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if len(d) == 0 {
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return nil, config.ErrInvalidCacheDrivesValue(nil).Msg("cache dir cannot be an empty path")
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}
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if !filepath.IsAbs(d) {
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return nil, config.ErrInvalidCacheDrivesValue(nil).Msg("cache dir should be absolute path: %s", d)
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}
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}
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return endpoints, nil
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}
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// Parses all arguments and returns a slice of drive paths following the ellipses pattern.
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func parseCacheDrivePaths(arg string) (ep []string, err error) {
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patterns, perr := ellipses.FindEllipsesPatterns(arg)
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if perr != nil {
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return []string{}, config.ErrInvalidCacheDrivesValue(nil).Msg(perr.Error())
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}
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for _, lbls := range patterns.Expand() {
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ep = append(ep, strings.Join(lbls, ""))
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}
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return ep, nil
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}
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// Parses given cacheExcludesEnv and returns a list of cache exclude patterns.
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func parseCacheExcludes(excludes []string) ([]string, error) {
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for _, e := range excludes {
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if len(e) == 0 {
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return nil, config.ErrInvalidCacheExcludesValue(nil).Msg("cache exclude path (%s) cannot be empty", e)
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}
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if strings.HasPrefix(e, "/") {
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return nil, config.ErrInvalidCacheExcludesValue(nil).Msg("cache exclude pattern (%s) cannot start with / as prefix", e)
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}
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}
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return excludes, nil
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}
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