mirror of
https://github.com/minio/minio.git
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b2293c2bf4
- xl-v1-bucket.go - removes a whole bunch of code. - {xl-v1,fs-v1}-metadata.go - add a lot of comments and rename functions appropriately.
227 lines
5.9 KiB
Go
227 lines
5.9 KiB
Go
package main
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import (
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"sort"
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"sync"
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)
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/// Bucket operations
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// MakeBucket - make a bucket.
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func (xl xlObjects) MakeBucket(bucket string) error {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return BucketNameInvalid{Bucket: bucket}
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}
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nsMutex.Lock(bucket, "")
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defer nsMutex.Unlock(bucket, "")
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// Err counters.
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createVolErr := 0 // Count generic create vol errs.
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volumeExistsErrCnt := 0 // Count all errVolumeExists errs.
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// Initialize sync waitgroup.
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var wg = &sync.WaitGroup{}
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// Initialize list of errors.
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var dErrs = make([]error, len(xl.storageDisks))
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// Make a volume entry on all underlying storage disks.
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for index, disk := range xl.storageDisks {
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wg.Add(1)
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// Make a volume inside a go-routine.
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go func(index int, disk StorageAPI) {
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defer wg.Done()
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err := disk.MakeVol(bucket)
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if err != nil {
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dErrs[index] = err
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return
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}
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dErrs[index] = nil
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}(index, disk)
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}
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// Wait for all make vol to finish.
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wg.Wait()
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// Look for specific errors and count them to be verified later.
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for _, err := range dErrs {
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if err == nil {
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continue
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}
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// if volume already exists, count them.
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if err == errVolumeExists {
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volumeExistsErrCnt++
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continue
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}
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// Update error counter separately.
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createVolErr++
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}
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// Return err if all disks report volume exists.
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if volumeExistsErrCnt == len(xl.storageDisks) {
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return toObjectErr(errVolumeExists, bucket)
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} else if createVolErr > len(xl.storageDisks)-xl.writeQuorum {
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// Return errWriteQuorum if errors were more than allowed write quorum.
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return toObjectErr(errWriteQuorum, bucket)
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}
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return nil
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}
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// getBucketInfo - returns the BucketInfo from one of the disks picked
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// at random.
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func (xl xlObjects) getBucketInfo(bucketName string) (bucketInfo BucketInfo, err error) {
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// Count for errors encountered.
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var bucketErrCount = 0
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// Return the first successful lookup from a random list of disks.
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for bucketErrCount < len(xl.storageDisks) {
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disk := xl.getRandomDisk() // Choose a random disk on each attempt.
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var volInfo VolInfo
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volInfo, err = disk.StatVol(bucketName)
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if err == nil {
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bucketInfo = BucketInfo{
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Name: volInfo.Name,
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Created: volInfo.Created,
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}
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return bucketInfo, nil
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}
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bucketErrCount++ // Update error count.
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}
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return BucketInfo{}, err
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}
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// Checks whether bucket exists.
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func (xl xlObjects) isBucketExist(bucket string) bool {
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nsMutex.RLock(bucket, "")
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defer nsMutex.RUnlock(bucket, "")
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// Check whether bucket exists.
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_, err := xl.getBucketInfo(bucket)
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if err != nil {
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if err == errVolumeNotFound {
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return false
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}
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errorIf(err, "Stat failed on bucket "+bucket+".")
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return false
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}
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return true
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}
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// GetBucketInfo - returns BucketInfo for a bucket.
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func (xl xlObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return BucketInfo{}, BucketNameInvalid{Bucket: bucket}
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}
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nsMutex.RLock(bucket, "")
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defer nsMutex.RUnlock(bucket, "")
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bucketInfo, err := xl.getBucketInfo(bucket)
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if err != nil {
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return BucketInfo{}, toObjectErr(err, bucket)
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}
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return bucketInfo, nil
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}
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// listBuckets - returns list of all buckets from a disk picked at random.
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func (xl xlObjects) listBuckets() (bucketsInfo []BucketInfo, err error) {
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// Count for errors encountered.
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var listBucketsErrCount = 0
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// Return the first successful lookup from a random list of disks.
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for listBucketsErrCount < len(xl.storageDisks) {
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disk := xl.getRandomDisk() // Choose a random disk on each attempt.
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var volsInfo []VolInfo
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volsInfo, err = disk.ListVols()
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if err == nil {
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// NOTE: The assumption here is that volumes across all disks in
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// readQuorum have consistent view i.e they all have same number
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// of buckets. This is essentially not verified since healing
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// should take care of this.
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var bucketsInfo []BucketInfo
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for _, volInfo := range volsInfo {
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// StorageAPI can send volume names which are incompatible
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// with buckets, handle it and skip them.
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if !IsValidBucketName(volInfo.Name) {
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continue
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}
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bucketsInfo = append(bucketsInfo, BucketInfo{
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Name: volInfo.Name,
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Created: volInfo.Created,
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})
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}
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return bucketsInfo, nil
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}
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listBucketsErrCount++ // Update error count.
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}
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return nil, err
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}
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// ListBuckets - lists all the buckets, sorted by its name.
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func (xl xlObjects) ListBuckets() ([]BucketInfo, error) {
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bucketInfos, err := xl.listBuckets()
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if err != nil {
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return nil, toObjectErr(err)
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}
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// Sort by bucket name before returning.
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sort.Sort(byBucketName(bucketInfos))
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return bucketInfos, nil
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}
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// DeleteBucket - deletes a bucket.
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func (xl xlObjects) DeleteBucket(bucket string) error {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return BucketNameInvalid{Bucket: bucket}
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}
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nsMutex.Lock(bucket, "")
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nsMutex.Unlock(bucket, "")
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// Collect if all disks report volume not found.
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var volumeNotFoundErrCnt int
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var wg = &sync.WaitGroup{}
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var dErrs = make([]error, len(xl.storageDisks))
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// Remove a volume entry on all underlying storage disks.
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for index, disk := range xl.storageDisks {
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wg.Add(1)
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// Delete volume inside a go-routine.
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go func(index int, disk StorageAPI) {
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defer wg.Done()
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err := disk.DeleteVol(bucket)
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if err != nil {
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dErrs[index] = err
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return
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}
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dErrs[index] = nil
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}(index, disk)
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}
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// Wait for all the delete vols to finish.
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wg.Wait()
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// Count the errors for known errors, return quickly if we found
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// an unknown error.
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for _, err := range dErrs {
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if err != nil {
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// We ignore error if errVolumeNotFound or errDiskNotFound
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if err == errVolumeNotFound || err == errDiskNotFound {
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volumeNotFoundErrCnt++
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continue
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}
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return toObjectErr(err, bucket)
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}
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}
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// Return errVolumeNotFound if all disks report volume not found.
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if volumeNotFoundErrCnt == len(xl.storageDisks) {
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return toObjectErr(errVolumeNotFound, bucket)
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}
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return nil
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}
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