Author: rmacklem
Date: Sun May 29 23:05:14 2016
New Revision: 300977
URL: https://svnweb.freebsd.org/changeset/base/300977
Log:
MFC: r299816
Fix fuse so that stale buffer cache data isn't read.
When I/O on a file under fuse is switched from buffered to DIRECT_IO,
it was possible to read stale (before a recent modification) data from
the buffer cache. This patch invalidates the buffer cache for the
file to fix this.
Modified:
stable/10/sys/fs/fuse/fuse_node.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/fs/fuse/fuse_node.c
==============================================================================
--- stable/10/sys/fs/fuse/fuse_node.c Sun May 29 22:28:39 2016
(r300976)
+++ stable/10/sys/fs/fuse/fuse_node.c Sun May 29 23:05:14 2016
(r300977)
@@ -289,7 +289,9 @@ fuse_vnode_open(struct vnode *vp, int32_
* XXXIP: Handle fd based DIRECT_IO
*/
if (fuse_open_flags & FOPEN_DIRECT_IO) {
+ ASSERT_VOP_ELOCKED(vp, __func__);
VTOFUD(vp)->flag |= FN_DIRECTIO;
+ fuse_io_invalbuf(vp, td);
} else {
VTOFUD(vp)->flag &= ~FN_DIRECTIO;
}
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