ceph: don't let check_caps skip sending responses for revoke msgs

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If a client sends out a cap update dropping caps with the prior 'seq'
just before an incoming cap revoke request, then the client may drop
the revoke because it believes it's already released the requested
capabilities.

This causes the MDS to wait indefinitely for the client to respond
to the revoke. It's therefore always a good idea to ack the cap
revoke request with the bumped up 'seq'.

Cc: stable@vger.kernel.org
Link: https://tracker.ceph.com/issues/61782
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Milind Changire <mchangir@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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Xiubo Li 2023-06-28 07:57:09 +08:00 • committed by Ilya Dryomov

parent ce72d4e0f1

commit 257e6172ab

1 changed files with 9 additions and 0 deletions

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fs/ceph/caps.c

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