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core/rawdb: polish

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This commit is contained in:
Gary Rong 2024-08-28 10:09:49 +08:00
parent 8b8e5b98cc
commit 0fe416d704
1 changed files with 14 additions and 7 deletions
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21
core/rawdb/freezer_table.go
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@ -446,8 +446,8 @@ func (t *freezerTable) repairIndex() error {
continue
}
// Ensure that the first non-head index refers to the earliest file,
// or the next file if the earliest file is not sufficient to
// place the first item.
// or the next file if the earliest file has no space to place the
// first item.
if offset == indexEntrySize {
if entry.filenum != head.filenum && entry.filenum != head.filenum+1 {
log.Error("Corrupted index item detected", "earliest", head.filenum, "filenumber", entry.filenum)
@ -474,11 +474,18 @@ func (t *freezerTable) repairIndex() error {
return nil
}
// checkIndexItems checks the validity of two consecutive index items. The index
// item is regarded as invalid if:
// - file number of two index items are not same and not monotonically increasing
// - data offset of two index items with same file number are out of order
// - zero data offset with an increasing file number
// checkIndexItems validates the correctness of two consecutive index items based
// on the following rules:
//
// - The file number of two consecutive index items must either be the same or
// increase monotonically. If the file number decreases or skips in a
// non-sequential manner, the index item is considered invalid.
//
// - For index items with the same file number, the data offset must be in
// non-decreasing order. Note: Two index items with the same file number
// and the same data offset are permitted if the entry size is zero.
//
// - The first index item in a new data file must not have a zero data offset.
func (t *freezerTable) checkIndexItems(a, b indexEntry) error {
if b.filenum != a.filenum && b.filenum != a.filenum+1 {
return fmt.Errorf("index items with inconsistent file number, prev: %d, next: %d", a.filenum, b.filenum)