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(parent: af9b6d7) | patch
NFSv4.1: Fix a potential layoutget/layoutrecall deadlock
authorTrond Myklebust <trond.myklebust@hammerspace.com>
Thu, 12 Jul 2018 18:19:03 +0000 (14:19 -0400)
committerTrond Myklebust <trond.myklebust@hammerspace.com>
Thu, 26 Jul 2018 20:25:25 +0000 (16:25 -0400)
commitbd3d16a887b0c19a2a20d35ffed499e3a3637feb
tree1c2ddddad9980c0668f902b3d2f9cee7c048455dtree | snapshot
parentaf9b6d7570ca9afbbc6076ab7920d8f00f7e55c1commit | diff
NFSv4.1: Fix a potential layoutget/layoutrecall deadlock

If the client is sending a layoutget, but the server issues a callback
to recall what it thinks may be an outstanding layout, then we may find
an uninitialised layout attached to the inode due to the layoutget.
In that case, it is appropriate to return NFS4ERR_NOMATCHING_LAYOUT
rather than NFS4ERR_DELAY, as the latter can end up deadlocking.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
fs/nfs/callback_proc.c diff | blob | history
Domain: System / Kernel;