fuse: Fix cores in notify function when this is executed in parallel

The fuse notify function gets called by the epoll or the poll thread
and till the point there is a single epoll thread, 2 notify
instances would not race with each other.

With the upcoming multi thread epoll changes, it is possible that
2 epoll threads invoke the notify function. As a result races
in this function are fixed with this commit.

The races seen are detailed in the bug, and the fix here is to
enforce a (slightly) longer critical section when updating the
fuse private structure and reserving state updates post error
handling.

Change-Id: I6974bc043cb59eb6dc39c5777123364dcefca358
BUG: 1180231
Signed-off-by: Shyam <srangana@redhat.com>
Reviewed-on: http://review.gluster.org/9421
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Tested-by: Raghavendra G <rgowdapp@redhat.com>

0 files changed, 0 insertions, 0 deletions