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Don't throw away the buffer contents on a fatal write error; just mark

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the buffer as still being dirty. This isn't a perfect solution, but
throwing away the buffer contents will often result in filesystem
corruption and this solution will at least correctly deal with transient
errors.
Submitted by:	Kirk McKusick <mckusick@mckusick.com>
This commit is contained in:
dg 1999-01-22 08:59:05 +00:00
parent 305d248a37
commit e4e8fec98a
1 changed files with 5 additions and 2 deletions
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7
sys/kern/vfs_bio.c
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@ -11,7 +11,7 @@
* 2. Absolutely no warranty of function or purpose is made by the author
* John S. Dyson.
*
* $Id: vfs_bio.c,v 1.194 1999/01/21 08:29:05 dillon Exp $
* $Id: vfs_bio.c,v 1.195 1999/01/21 09:19:33 dillon Exp $
*/
/*
@ -577,7 +577,10 @@ brelse(struct buf * bp)
if (bp->b_flags & B_LOCKED)
bp->b_flags &= ~B_ERROR;
if ((bp->b_flags & (B_NOCACHE | B_INVAL | B_ERROR | B_FREEBUF)) ||
if ((bp->b_flags & (B_READ | B_ERROR)) == B_ERROR) {
bp->b_flags &= ~B_ERROR;
bdirty(bp);
} else if ((bp->b_flags & (B_NOCACHE | B_INVAL | B_ERROR | B_FREEBUF)) ||
(bp->b_bufsize <= 0)) {
bp->b_flags |= B_INVAL;
if (LIST_FIRST(&bp->b_dep) != NULL && bioops.io_deallocate)