diff options
Diffstat (limited to 'include/sys/dmu_traverse.h')
| -rw-r--r-- | include/sys/dmu_traverse.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/sys/dmu_traverse.h b/include/sys/dmu_traverse.h index 8ceef5cf1..d76bfe3c9 100644 --- a/include/sys/dmu_traverse.h +++ b/include/sys/dmu_traverse.h @@ -20,7 +20,7 @@ */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2012, 2014 by Delphix. All rights reserved. + * Copyright (c) 2012, 2018 by Delphix. All rights reserved. */ #ifndef _SYS_DMU_TRAVERSE_H @@ -71,6 +71,20 @@ int traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr, int traverse_pool(spa_t *spa, uint64_t txg_start, int flags, blkptr_cb_t func, void *arg); +/* + * Note that this calculation cannot overflow with the current maximum indirect + * block size (128k). If that maximum is increased to 1M, however, this + * calculation can overflow, and handling would need to be added to ensure + * continued correctness. + */ +static inline uint64_t +bp_span_in_blocks(uint8_t indblkshift, uint64_t level) +{ + unsigned int shift = level * (indblkshift - SPA_BLKPTRSHIFT); + ASSERT3U(shift, <, 64); + return (1ULL << shift); +} + #ifdef __cplusplus } #endif |