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Replace P2ALIGN with P2ALIGN_TYPED and delete P2ALIGN.

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In P2ALIGN, the result would be incorrect when align is unsigned
integer and x is larger than max value of the type of align.
In that case, -(align) would be a positive integer, which means
high bits would be zero and finally stay zero after '&' when
align is converted to a larger integer type.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Youzhong Yang <yyang@mathworks.com>
Signed-off-by: Qiuhao Chen <chenqiuhao1997@gmail.com>
Closes #15940
This commit is contained in:
chenqiuhao1997
2024-05-10 23:47:21 +08:00
committed by Brian Behlendorf
parent 2566592045
commit 9edf6af4ae
16 changed files with 40 additions and 29 deletions
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module/zcommon/zfs_fletcher.c
+5 -3
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@@ -471,7 +471,8 @@ fletcher_4_native(const void *buf, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
(void) ctx_template;
const uint64_t p2size = P2ALIGN(size, FLETCHER_MIN_SIMD_SIZE);
const uint64_t p2size = P2ALIGN_TYPED(size, FLETCHER_MIN_SIMD_SIZE,
uint64_t);
ASSERT(IS_P2ALIGNED(size, sizeof (uint32_t)));
@@ -519,7 +520,8 @@ fletcher_4_byteswap(const void *buf, uint64_t size,
const void *ctx_template, zio_cksum_t *zcp)
{
(void) ctx_template;
const uint64_t p2size = P2ALIGN(size, FLETCHER_MIN_SIMD_SIZE);
const uint64_t p2size = P2ALIGN_TYPED(size, FLETCHER_MIN_SIMD_SIZE,
uint64_t);
ASSERT(IS_P2ALIGNED(size, sizeof (uint32_t)));
@@ -878,7 +880,7 @@ abd_fletcher_4_iter(void *data, size_t size, void *private)
fletcher_4_ctx_t *ctx = cdp->acd_ctx;
fletcher_4_ops_t *ops = (fletcher_4_ops_t *)cdp->acd_private;
boolean_t native = cdp->acd_byteorder == ZIO_CHECKSUM_NATIVE;
uint64_t asize = P2ALIGN(size, FLETCHER_MIN_SIMD_SIZE);
uint64_t asize = P2ALIGN_TYPED(size, FLETCHER_MIN_SIMD_SIZE, uint64_t);
ASSERT(IS_P2ALIGNED(size, sizeof (uint32_t)));