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package s3api
import (
"errors"
"time"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"
"github.com/seaweedfs/seaweedfs/weed/util"
)
func (s3a *S3ApiServer) subscribeMetaEvents(clientName string, lastTsNs int64, prefix string, directoriesToWatch []string) {
processEventFn := func(resp *filer_pb.SubscribeMetadataResponse) error {
message := resp.EventNotification
if message.NewEntry == nil {
return nil
}
dir := resp.Directory
if message.NewParentPath != "" {
dir = message.NewParentPath
}
fileName := message.NewEntry.Name
content := message.NewEntry.Content
_ = s3a.onIamConfigUpdate(dir, fileName, content)
_ = s3a.onCircuitBreakerConfigUpdate(dir, fileName, content)
_ = s3a.onBucketMetadataChange(dir, message.OldEntry, message.NewEntry)
return nil
}
metadataFollowOption := &pb.MetadataFollowOption{
ClientName: clientName,
ClientId: s3a.randomClientId,
ClientEpoch: 1,
SelfSignature: 0,
PathPrefix: prefix,
AdditionalPathPrefixes: nil,
DirectoriesToWatch: directoriesToWatch,
StartTsNs: lastTsNs,
StopTsNs: 0,
EventErrorType: pb.FatalOnError,
}
util.RetryUntil("followIamChanges", func() error {
metadataFollowOption.ClientEpoch++
return pb.WithFilerClientFollowMetadata(s3a, metadataFollowOption, processEventFn)
}, func(err error) bool {
glog.V(0).Infof("iam follow metadata changes: %v", err)
return true
})
}
// reload iam config
func (s3a *S3ApiServer) onIamConfigUpdate(dir, filename string, content []byte) error {
if dir == filer.IamConfigDirectory && filename == filer.IamIdentityFile {
if err := s3a.iam.LoadS3ApiConfigurationFromBytes(content); err != nil {
return err
}
glog.V(0).Infof("updated %s/%s", dir, filename)
}
return nil
}
// reload circuit breaker config
func (s3a *S3ApiServer) onCircuitBreakerConfigUpdate(dir, filename string, content []byte) error {
if dir == s3_constants.CircuitBreakerConfigDir && filename == s3_constants.CircuitBreakerConfigFile {
if err := s3a.cb.LoadS3ApiConfigurationFromBytes(content); err != nil {
return err
}
glog.V(0).Infof("updated %s/%s", dir, filename)
}
return nil
}
// reload bucket metadata
func (s3a *S3ApiServer) onBucketMetadataChange(dir string, oldEntry *filer_pb.Entry, newEntry *filer_pb.Entry) error {
if dir == s3a.option.BucketsPath {
if newEntry != nil {
// Update bucket registry (existing functionality)
s3a.bucketRegistry.LoadBucketMetadata(newEntry)
glog.V(0).Infof("updated bucketMetadata %s/%s", dir, newEntry.Name)
// Update bucket configuration cache with new entry
s3a.updateBucketConfigCacheFromEntry(newEntry)
} else if oldEntry != nil {
// Remove from bucket registry (existing functionality)
s3a.bucketRegistry.RemoveBucketMetadata(oldEntry)
glog.V(0).Infof("remove bucketMetadata %s/%s", dir, oldEntry.Name)
// Remove from bucket configuration cache
s3a.invalidateBucketConfigCache(oldEntry.Name)
}
}
return nil
}
// updateBucketConfigCacheFromEntry updates the bucket config cache when a bucket entry changes
func (s3a *S3ApiServer) updateBucketConfigCacheFromEntry(entry *filer_pb.Entry) {
if s3a.bucketConfigCache == nil {
return
}
bucket := entry.Name
glog.V(3).Infof("updateBucketConfigCacheFromEntry: called for bucket %s, ExtObjectLockEnabledKey=%s",
bucket, string(entry.Extended[s3_constants.ExtObjectLockEnabledKey]))
// Create new bucket config from the entry
config := &BucketConfig{
Name: bucket,
Entry: entry,
IsPublicRead: false, // Explicitly default to false for private buckets
}
// Extract configuration from extended attributes
if entry.Extended != nil {
if versioning, exists := entry.Extended[s3_constants.ExtVersioningKey]; exists {
config.Versioning = string(versioning)
}
if ownership, exists := entry.Extended[s3_constants.ExtOwnershipKey]; exists {
config.Ownership = string(ownership)
}
if acl, exists := entry.Extended[s3_constants.ExtAmzAclKey]; exists {
config.ACL = acl
// Parse ACL and cache public-read status
config.IsPublicRead = parseAndCachePublicReadStatus(acl)
} else {
// No ACL means private bucket
config.IsPublicRead = false
}
if owner, exists := entry.Extended[s3_constants.ExtAmzOwnerKey]; exists {
config.Owner = string(owner)
}
// Parse Object Lock configuration if present
if objectLockConfig, found := LoadObjectLockConfigurationFromExtended(entry); found {
config.ObjectLockConfig = objectLockConfig
glog.V(2).Infof("updateBucketConfigCacheFromEntry: cached Object Lock configuration for bucket %s: %+v", bucket, objectLockConfig)
} else {
glog.V(3).Infof("updateBucketConfigCacheFromEntry: no Object Lock configuration found for bucket %s", bucket)
}
// Load bucket policy if present (for performance optimization)
config.BucketPolicy = loadBucketPolicyFromExtended(entry, bucket)
}
// Sync bucket policy to the policy engine for evaluation
s3a.syncBucketPolicyToEngine(bucket, config.BucketPolicy)
// Load CORS configuration from bucket directory content
if corsConfig, err := s3a.loadCORSFromBucketContent(bucket); err != nil {
if !errors.Is(err, filer_pb.ErrNotFound) {
glog.Errorf("updateBucketConfigCacheFromEntry: failed to load CORS configuration for bucket %s: %v", bucket, err)
}
} else {
config.CORS = corsConfig
glog.V(2).Infof("updateBucketConfigCacheFromEntry: loaded CORS config for bucket %s", bucket)
}
// Update timestamp
config.LastModified = time.Now()
// Update cache
glog.V(3).Infof("updateBucketConfigCacheFromEntry: updating cache for bucket %s, ObjectLockConfig=%+v", bucket, config.ObjectLockConfig)
s3a.bucketConfigCache.Set(bucket, config)
}
// invalidateBucketConfigCache removes a bucket from the configuration cache
func (s3a *S3ApiServer) invalidateBucketConfigCache(bucket string) {
if s3a.bucketConfigCache == nil {
return
}
s3a.bucketConfigCache.Remove(bucket)
s3a.bucketConfigCache.RemoveNegativeCache(bucket) // Also remove from negative cache
glog.V(2).Infof("invalidateBucketConfigCache: removed bucket %s from cache", bucket)
}
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