Date: Mon, 24 Nov 1997 08:33:05 -0800 (PST) From: Bruce Evans <bde@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/ufs/ufs ufs_bmap.c Message-ID: <199711241633.IAA21767@freefall.freebsd.org>
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bde 1997/11/24 08:33:04 PST
Modified files:
sys/ufs/ufs ufs_bmap.c
Log:
Fixed overflow in ufs_getblns(). For ufs on systems with 32-bit ints,
triple indirect blocks only worked for block sizes of 4K, since
MNINDIR(ump)**3 overflows for larger block sizes (e.g.,
(8192/4)**3 = 2**33 > INT_MAX). This fix is not the obvious one of
changing some types to 64 bits. It rearranges the code to avoid some
unnecessary 64-bit calculations.
Reviewed by: Kirk McKusick <mckusick@McKusick.COM>
Revision Changes Path
1.17 +14 -7 src/sys/ufs/ufs/ufs_bmap.c
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