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[10/10] orangefs: do not check possibly stale size on truncate

Message ID 1491599832-17773-11-git-send-email-martin@omnibond.com (mailing list archive)
State New, archived
Headers show

Commit Message

Martin Brandenburg April 7, 2017, 9:17 p.m. UTC
Let the server figure this out because our size might be out of date or
not present.

The bug was that

	xfs_io -f -t -c "pread -v 0 100" /mnt/foo
	echo "Test" > /mnt/foo
	xfs_io -f -t -c "pread -v 0 100" /mnt/foo

fail because the second truncate did not happen if nothing had requested
the size after the write in echo.  Thus i_size was zero (not present)
and the orangefs_setattr though i_size was zero and there was nothing to
do.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
---
 fs/orangefs/inode.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index ee28364..7f82e56 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -218,8 +218,7 @@  int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
 	if (ret)
 		goto out;
 
-	if ((iattr->ia_valid & ATTR_SIZE) &&
-	    iattr->ia_size != i_size_read(inode)) {
+	if (iattr->ia_valid & ATTR_SIZE) {
 		ret = orangefs_setattr_size(inode, iattr);
 		if (ret)
 			goto out;