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BRT: Fix ranges to blocks conversion math

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BRT_RANGESIZE_TO_NBLOCKS() takes number of ranges as its argument.
To get number of blocks we should multiply it by the entry size,
not divide by it, as it was due to missing parentheses.

Before #17875 this could cause small memory corruptions for vdevs
bigger than 64TB, but the change made the bug more noticeable.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17886
Closes #17915
This commit is contained in:
Alexander Motin 2025-11-10 16:58:39 -05:00 committed by Brian Behlendorf
parent e1734111fd
commit e305c7d596
1 changed files with 1 additions and 1 deletions
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2
include/sys/brt_impl.h
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@ -65,7 +65,7 @@ _Static_assert(BRT_RANGESIZE / SPA_MINBLOCKSIZE <= UINT16_MAX,
*/
#define BRT_BLOCKSIZE (32 * 1024)
#define BRT_RANGESIZE_TO_NBLOCKS(size) \
(((size) - 1) / BRT_BLOCKSIZE / sizeof (uint16_t) + 1)
(((size) - 1) / (BRT_BLOCKSIZE / sizeof (uint16_t)) + 1)
#define BRT_LITTLE_ENDIAN 0
#define BRT_BIG_ENDIAN 1