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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| package filesystem | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams" | ||
| "github.com/prysmaticlabs/prysm/v5/config/params" | ||
| "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives" | ||
| ) | ||
|
|
||
| // blobIndexMask is a bitmask representing the set of blob indices that are currently set. | ||
| type blobIndexMask [fieldparams.MaxBlobsPerBlock]bool | ||
|
|
||
| // BlobStorageSummary represents cached information about the BlobSidecars on disk for each root the cache knows about. | ||
| type BlobStorageSummary struct { | ||
| slot primitives.Slot | ||
| mask blobIndexMask | ||
| } | ||
|
|
||
| // HasIndex returns true if the BlobSidecar at the given index is available in the filesystem. | ||
| func (s BlobStorageSummary) HasIndex(idx uint64) bool { | ||
| // Protect from panic, but assume callers are sophisticated enough to not need an error telling them they have an invalid idx. | ||
| if idx >= fieldparams.MaxBlobsPerBlock { | ||
| return false | ||
| } | ||
| return s.mask[idx] | ||
| } | ||
|
|
||
| // AllAvailable returns true if we have all blobs for all indices from 0 to count-1. | ||
| func (s BlobStorageSummary) AllAvailable(count int) bool { | ||
| if count > fieldparams.MaxBlobsPerBlock { | ||
| return false | ||
| } | ||
| for i := 0; i < count; i++ { | ||
| if !s.mask[i] { | ||
| return false | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| // BlobStorageSummarizer can be used to receive a summary of metadata about blobs on disk for a given root. | ||
| // The BlobStorageSummary can be used to check which indices (if any) are available for a given block by root. | ||
| type BlobStorageSummarizer interface { | ||
| Summary(root [32]byte) BlobStorageSummary | ||
| } | ||
|
|
||
| type blobStorageCache struct { | ||
| mu sync.RWMutex | ||
| nBlobs float64 | ||
| cache map[string]BlobStorageSummary | ||
| } | ||
|
|
||
| var _ BlobStorageSummarizer = &blobStorageCache{} | ||
|
|
||
| func newBlobStorageCache() *blobStorageCache { | ||
| return &blobStorageCache{ | ||
| cache: make(map[string]BlobStorageSummary, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest*fieldparams.SlotsPerEpoch), | ||
| } | ||
| } | ||
|
|
||
| // Summary returns the BlobStorageSummary for `root`. The BlobStorageSummary can be used to check for the presence of | ||
| // BlobSidecars based on Index. | ||
| func (s *blobStorageCache) Summary(root [32]byte) BlobStorageSummary { | ||
| k := rootString(root) | ||
| s.mu.RLock() | ||
| defer s.mu.RUnlock() | ||
| return s.cache[k] | ||
| } | ||
|
|
||
| func (s *blobStorageCache) ensure(key string, slot primitives.Slot, idx uint64) error { | ||
| if idx >= fieldparams.MaxBlobsPerBlock { | ||
| return errIndexOutOfBounds | ||
| } | ||
| s.mu.Lock() | ||
| defer s.mu.Unlock() | ||
| v := s.cache[key] | ||
| v.slot = slot | ||
| if !v.mask[idx] { | ||
| s.updateMetrics(1) | ||
| } | ||
| v.mask[idx] = true | ||
| s.cache[key] = v | ||
| return nil | ||
| } | ||
|
|
||
| func (s *blobStorageCache) slot(key string) (primitives.Slot, bool) { | ||
| s.mu.RLock() | ||
| defer s.mu.RUnlock() | ||
| v, ok := s.cache[key] | ||
| if !ok { | ||
| return 0, false | ||
| } | ||
| return v.slot, ok | ||
| } | ||
|
|
||
| func (s *blobStorageCache) evict(key string) { | ||
| var deleted float64 | ||
| s.mu.Lock() | ||
| v, ok := s.cache[key] | ||
| if ok { | ||
| for i := range v.mask { | ||
| if v.mask[i] { | ||
| deleted += 1 | ||
| } | ||
| } | ||
| } | ||
| delete(s.cache, key) | ||
| s.mu.Unlock() | ||
| if deleted > 0 { | ||
| s.updateMetrics(-deleted) | ||
| } | ||
| } | ||
|
|
||
| func (s *blobStorageCache) updateMetrics(delta float64) { | ||
| s.nBlobs += delta | ||
| blobDiskCount.Set(s.nBlobs) | ||
| blobDiskSize.Set(s.nBlobs * bytesPerSidecar) | ||
| } |
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