Disable brick daemon from incorrect brick directory

Summary:
Currently the bricks can open any mount directory from the given volume. This patch adds a provision to prevent
bricks from opening brick directories that aren't created for them. This will help with operating gluster on large
scale.

We add a new xattr GF_XATTR_BRICK_NAME to the brick directory. When we start a brick daemon, we make sure the path on
disk matches with the config provided. For backward compatibility, we ignore if there is no value for
GF_XATTR_BRICK_NAME and set the current brick daemon's path as value.

We ignore GF_XATTR_BRICK_NAME during healing and reset GF_XATTR_BRICK_NAME on brick replace.

Test Plan: Run fb-smoke

Reviewers: jdarcy, sshreyas

Reviewed By: sshreyas

Differential Revision: https://phabricator.intern.facebook.com/D5448921

Porting note: disabled some checks to deal with the snapshot case

Change-Id: I98e62033dfd07f30ad3b99ac003ce94c8d935e5f
Signed-off-by: Jeff Darcy <jdarcy@fb.com>
Reviewed-on: https://review.gluster.org/18275
Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
Tested-by: Jeff Darcy <jeff@pl.atyp.us>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions