tree 5d229b3f11b1e9800b95f47bdd1570c2b40e7675
parent eed2179efe1aac145bf6d54b925b750976380fa6
author Brian Foster <bfoster@redhat.com> 1342466630 -0400
committer Miklos Szeredi <mszeredi@suse.cz> 1342620580 +0200

fuse: update attributes on aio_read

A fuse-based network filesystem might allow for the inode
and/or file data to change unexpectedly. A local client
that opens and repeatedly reads a file might never pick
up on such changes and indefinitely return stale data.

Always invoke fuse_update_attributes() in the read path
to cause an attr revalidation when the attributes expire.
This leads to a page cache invalidation if necessary and
ensures fuse issues new read requests to the fuse client.

The original logic (reval only on reads beyond EOF) is
preserved unless the client specifies FUSE_AUTO_INVAL_DATA
on init.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>