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in ufs_balloc_range(), if we extend a fragment and need to write the 

fragment synchronously, update the vnode's size before doing the flush.
otherwise we might only write part of the data and cause softdep's
accounting to get out of sync.  fixes PR 14201.
many thanks to enami for figuring out what was going on.
This commit is contained in:
chs 2001-10-10 06:37:53 +00:00
parent 652855a0c7
commit eaa7f39f23
1 changed files with 6 additions and 4 deletions
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10
sys/ufs/ufs/ufs_inode.c
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@ -1,4 +1,4 @@
/* $NetBSD: ufs_inode.c,v 1.26 2001/09/30 02:54:42 chs Exp $ */
/* $NetBSD: ufs_inode.c,v 1.27 2001/10/10 06:37:53 chs Exp $ */
/*
* Copyright (c) 1991, 1993
@ -166,7 +166,7 @@ ufs_balloc_range(vp, off, len, cred, flags)
struct ucred *cred;
int flags;
{
off_t oldeof, neweof, oldeob, neweob, oldpagestart, pagestart;
off_t tmpeof, oldeof, neweof, oldeob, neweob, oldpagestart, pagestart;
struct uvm_object *uobj;
struct genfs_node *gp = VTOG(vp);
int i, delta, error, npages1, npages2;
@ -286,9 +286,11 @@ out:
*/
if (flags & B_SYNC) {
tmpeof = MIN(neweof,
(oldeof + bsize - 1) & ~(bsize - 1));
vp->v_size = tmpeof;
(uobj->pgops->pgo_put)(uobj, oldeof & ~(bsize - 1),
MIN((oldeof + bsize) & ~(bsize - 1),
round_page(neweob)), PGO_CLEANIT | PGO_SYNCIO);
round_page(tmpeof), PGO_CLEANIT | PGO_SYNCIO);
simple_lock(&uobj->vmobjlock);
}
}