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102 lines
2.5 KiB
102 lines
2.5 KiB
// +build linux,amd64
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/*
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* Minimalist Object Storage, (C) 2015 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 scsi
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import (
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"errors"
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"io/ioutil"
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"path/filepath"
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"github.com/minio/minio/pkg/iodine"
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)
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// NOTE : supporting virtio based scsi devices is out of scope for this implementation
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// Attributes Scsi device attributes
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type Attributes map[string]string
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// Disks is a list of scsis disks and attributes
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type Disks map[string]Attributes
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// Get get disk scsi params
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func (d Disks) Get(disk string) Attributes {
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return d[disk]
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}
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// Len return len of total disks
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func (d Disks) Len() int {
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return len(d)
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}
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// GetDisks - get system devices list
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func GetDisks() (Disks, error) {
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var scsidevices []string
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var scsiAttrList []string
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d := Disks{}
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sysFiles, err := ioutil.ReadDir(sysFSDEVICES)
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if err != nil {
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// may be an amazon instance, ignore this
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return Disks{}, nil
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}
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scsidevices = filterdisks(sysFiles)
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if len(scsidevices) == 0 {
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// may be a docker instance, ignore this
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return Disks{}, nil
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}
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for _, s := range scsidevices {
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scsiAttrPath := filepath.Join(sysFSDEVICES, s)
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scsiAttrs, err := ioutil.ReadDir(scsiAttrPath)
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if err != nil {
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return Disks{}, iodine.New(err, nil)
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}
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scsiBlockPath := filepath.Join(sysFSDEVICES, s, sysFSBLOCK)
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scsidevList, err := ioutil.ReadDir(scsiBlockPath)
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if err != nil {
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return Disks{}, iodine.New(err, nil)
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}
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if len(scsidevList) > 1 {
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return Disks{}, iodine.New(errors.New("Scsi address points to multiple block devices"), nil)
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}
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device := filepath.Join(udev, scsidevList[0].Name())
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for _, sa := range scsiAttrs {
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// Skip directories
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if sa.IsDir() {
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continue
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}
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// Skip symlinks
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if !sa.Mode().IsRegular() {
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continue
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}
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// Skip, not readable, write-only
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if sa.Mode().Perm() == 128 {
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continue
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}
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scsiAttrList = append(scsiAttrList, sa.Name())
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}
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if len(scsiAttrList) == 0 {
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return Disks{}, iodine.New(errors.New("No scsi attributes found"), nil)
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}
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d[device] = getattrs(scsiAttrPath, scsiAttrList)
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}
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return d, nil
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}
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