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Fix positive ABD size assertion in abd_verify(). 

Gang ABDs without childred are legal, and they do have zero size.
For other ABD types zero size doesn't have much sense and likely
not working correctly now.

Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14795
This commit is contained in:
Alexander Motin 2023-04-26 12:20:43 -04:00 committed by GitHub
parent e37a89d5d0
commit bba7cbf0a4
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1 changed files with 2 additions and 1 deletions
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3
module/zfs/abd.c
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@ -109,7 +109,6 @@ void
abd_verify(abd_t *abd)
{
#ifdef ZFS_DEBUG
ASSERT3U(abd->abd_size, >, 0);
ASSERT3U(abd->abd_size, <=, SPA_MAXBLOCKSIZE);
ASSERT3U(abd->abd_flags, ==, abd->abd_flags & (ABD_FLAG_LINEAR |
ABD_FLAG_OWNER | ABD_FLAG_META | ABD_FLAG_MULTI_ZONE |
@ -118,6 +117,7 @@ abd_verify(abd_t *abd)
IMPLY(abd->abd_parent != NULL, !(abd->abd_flags & ABD_FLAG_OWNER));
IMPLY(abd->abd_flags & ABD_FLAG_META, abd->abd_flags & ABD_FLAG_OWNER);
if (abd_is_linear(abd)) {
ASSERT3U(abd->abd_size, >, 0);
ASSERT3P(ABD_LINEAR_BUF(abd), !=, NULL);
} else if (abd_is_gang(abd)) {
uint_t child_sizes = 0;
@ -130,6 +130,7 @@ abd_verify(abd_t *abd)
}
ASSERT3U(abd->abd_size, ==, child_sizes);
} else {
ASSERT3U(abd->abd_size, >, 0);
abd_verify_scatter(abd);
}
#endif