Paul Dagnelie 32d41fb73a OpenZFS 7176 - Yet another hole birth issue ... This is another bug in the long line of hole-birth related issues. In this particular case, it was discovered that a previous hole-birth fix (illumos bug 6513, commit bc77ba73) did not cover as many cases as we thought it did. While the issue worked in the case of hole-punching (writing zeroes to a large part of a file), it did not deal with truncation, and then writing beyond the new end of the file. The problem is that dbuf_findbp will return ENOENT if the block it's trying to find is beyond the end of the file. If that happens, we assume there is no birth time, and so we lose that information when we write out new blkptrs. We should teach dbuf_findbp to look for things that are beyond the current end, but not beyond the absolute end of the file. Authored by: Paul Dagnelie <pcd@delphix.com> Reviewed by: Matthew Ahrens mahrens@delphix.com Reviewed by: George Wilson george.wilson@delphix.com Ported-by: kernelOfTruth <kerneloftruth@gmail.com> Signed-off-by: Boris Protopopov <boris.protopopov@actifio.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> OpenZFS-issue: https://www.illumos.org/issues/7176 OpenZFS-commit: https://github.com/openzfs/openzfs/pull/173/commits/8b9f3ad Upstream-bugs: DLPX-46009 Porting notes: - Fix ISO C90 mixed declaration error in dbuf.c ( int nlevels, epbs; ) ; keep previous position of the initialization		2016-08-18 09:26:44 -07:00
..
avl	Fix uninitialized variable in avl_add()	2016-07-25 14:21:34 -07:00
icp	icp: mark asm files with noexec stack	2016-08-12 09:51:26 -07:00
nvpair	OpenZFS 7263 - deeply nested nvlist can overflow stack	2016-08-11 15:58:03 -07:00
unicode	Build user-space with different gcc optimization levels	2016-08-09 14:40:35 -07:00
zcommon	Rework of fletcher_4 module	2016-08-16 14:11:55 -07:00
zfs	OpenZFS 7176 - Yet another hole birth issue	2016-08-18 09:26:44 -07:00
zpios	Add large block support to zpios(1) benchmark	2015-09-22 09:13:20 -07:00
.gitignore	module/.gitignore: Add *.dwo (#4580)	2016-05-02 09:07:04 -07:00
Makefile.in	Illumos Crypto Port module added to enable native encryption in zfs	2016-07-20 10:43:30 -07:00