NFSD: Track svc_export in nfs4_stid

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Add an sc_export field to struct nfs4_stid so that each stateid
records the export under which it was acquired.  The export
reference is taken via exp_get() at stateid creation and released
via exp_put() in nfs4_put_stid().

Open stateids record the export from current_fh->fh_export.
Lock stateids and delegations inherit the export from their
parent open stateid. Layout stateids inherit from their
parent stateid. Directory delegations record the export from
cstate->current_fh.

A subsequent commit uses sc_export to scope state revocation to a
specific export, avoiding the need to walk inode dentry aliases at
revocation time.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Tested-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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Chuck Lever 2026-04-19 14:53:05 -04:00 • committed by Chuck Lever

parent 8fc2748835

commit ba0cde5dc8

3 changed files with 42 additions and 3 deletions

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2

fs/nfsd/nfs4layouts.c

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42

fs/nfsd/nfs4state.c

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1

fs/nfsd/state.h

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