Date: Tue, 3 Dec 2002 10:19:27 -0800 (PST) From: Kirk McKusick <mckusick@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/ufs/ffs ffs_snapshot.c Message-ID: <200212031819.gB3IJRdk066485@repoman.freebsd.org>
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mckusick 2002/12/03 10:19:27 PST
Modified files:
sys/ufs/ffs ffs_snapshot.c
Log:
Have to use bread() rather than UFS_BALLOC() when obtaining a
previously allocated block as the previous use of the block may
have fallen out of the cache. Failure to reread its contents cause
zeroed results to be written instead of the proper contents.
Conversely, when the block is going to be entirely filled in, it
is not necessary reread the old contents.
Sponsored by: DARPA & NAI Labs.
Approved by: re
Revision Changes Path
1.53 +30 -24 src/sys/ufs/ffs/ffs_snapshot.c
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