tree 0679e0f43274648bad70e694a9efb8bcfed55adc
parent 8599396b5062bf6bd2a0b433503849e2322df1c2
author Tejun Heo <tj@kernel.org> 1227697435 +0100
committer Miklos Szeredi <miklos@szeredi.hu> 1227697435 +0100

fuse: implement poll support

Implement poll support.  Polled files are indexed using kh in a RB
tree rooted at fuse_conn->polled_files.

Client should send FUSE_NOTIFY_POLL notification once after processing
FUSE_POLL which has FUSE_POLL_SCHEDULE_NOTIFY set.  Sending
notification unconditionally after the latest poll or everytime file
content might have changed is inefficient but won't cause malfunction.

fuse_file_poll() can sleep and requires patches from the following
thread which allows f_op->poll() to sleep.

  http://thread.gmane.org/gmane.linux.kernel/726176

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>