Additional changes - Use ``iota`` for constants - Remove unncessary C header files - ``new-cmd`` now depends on codegangsta cli
170 lines
3.7 KiB
Go
170 lines
3.7 KiB
Go
/*
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* Mini Object Storage, (C) 2014 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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// !build linux,amd64
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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"
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)
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// NOTE : supporting virtio based scsi devices
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// is out of scope for this implementation
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type Scsi struct {
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Disk string
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Scsiattrmap map[string][]byte
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Diskattrmap map[string][]byte
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}
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type Devices struct {
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List []Scsi
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}
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func (d *Devices) getInfo(disk string) (map[string][]byte, error) {
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var diskAttrsList []string
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var diskQueueAttrs []string
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aggrAttrMap := make(map[string][]byte)
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sysfs_block_dev := path.Join(SYSFS_BLOCK + disk)
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sysfs_block_dev_queue := path.Join(sysfs_block_dev + "/queue")
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scsiFiles, err := ioutil.ReadDir(sysfs_block_dev)
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if err != nil {
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return nil, err
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}
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scsiQueueFiles, err := ioutil.ReadDir(sysfs_block_dev_queue)
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if err != nil {
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return nil, err
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}
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for _, sf := range scsiFiles {
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if sf.IsDir() {
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continue
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}
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// Skip symlinks
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if !sf.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 sf.Mode().Perm() == 128 {
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continue
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}
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diskAttrsList = append(diskAttrsList, sf.Name())
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}
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for _, sf := range scsiQueueFiles {
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if sf.IsDir() {
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continue
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}
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// Skip symlinks
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if !sf.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 sf.Mode().Perm() == 128 {
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continue
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}
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diskQueueAttrs = append(diskQueueAttrs, sf.Name())
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}
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if len(diskAttrsList) == 0 {
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return nil, errors.New("No disk attributes found")
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}
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if len(diskQueueAttrs) == 0 {
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return nil, errors.New("No disk queue attributes found")
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}
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diskAttrMap := getattrs(sysfs_block_dev, diskAttrsList)
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diskQueueAttrMap := getattrs(sysfs_block_dev_queue, diskQueueAttrs)
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for k, v := range diskAttrMap {
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aggrAttrMap[k] = v
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}
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for k, v := range diskQueueAttrMap {
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aggrAttrMap[k] = v
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}
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return aggrAttrMap, nil
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}
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func (d *Devices) Get() error {
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var scsidevices []string
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var scsiAttrList []string
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sysFiles, err := ioutil.ReadDir(SYSFS_SCSI_DEVICES)
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if err != nil {
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return err
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}
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scsidevices = filterdevices(sysFiles)
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if len(scsidevices) == 0 {
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return errors.New("No scsi devices found on the system")
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}
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for _, scsi := range scsidevices {
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var _scsi Scsi
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scsiAttrPath := path.Join(SYSFS_SCSI_DEVICES, scsi, "/")
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scsiAttrs, err := ioutil.ReadDir(scsiAttrPath)
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if err != nil {
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return err
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}
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scsiBlockPath := path.Join(SYSFS_SCSI_DEVICES, scsi, "/block")
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scsidevList, err := ioutil.ReadDir(scsiBlockPath)
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if err != nil {
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return err
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}
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if len(scsidevList) > 1 {
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return errors.New("Scsi address points to multiple block devices")
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}
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_scsi.Disk = 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 errors.New("No scsi attributes found")
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}
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attrMap := getattrs(scsiAttrPath, scsiAttrList)
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_scsi.Scsiattrmap = attrMap
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_scsi.Diskattrmap, err = d.getInfo(scsidevList[0].Name())
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if err != nil {
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return err
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}
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d.List = append(d.List, _scsi)
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}
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return nil
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}
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