nfsd: cancel async COPY operations when admin revokes filesystem state

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Async COPY operations hold copy stateids that represent NFSv4 state.
Thus, when the NFS server administrator revokes all NFSv4 state for
a filesystem via the unlock_fs interface, ongoing async COPY
operations referencing that filesystem must also be canceled.

Each cancelled copy triggers a CB_OFFLOAD callback carrying the
NFS4ERR_ADMIN_REVOKED status to notify the client that the server
terminated the operation.

The static drop_client() function is renamed to nfsd4_put_client()
and exported. The function must be exported because both the new
nfsd4_cancel_copy_by_sb() and the CB_OFFLOAD release callback in
nfs4proc.c need to release client references.

Reviewed-by: NeilBrown <neil@brown.name>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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This commit is contained in:

Chuck Lever 2026-01-07 19:40:11 -05:00

parent d8316b837c

commit 3daab3112f

5 changed files with 133 additions and 18 deletions

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124

fs/nfsd/nfs4proc.c

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20

fs/nfsd/nfs4state.c

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1

fs/nfsd/nfsctl.c

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5

fs/nfsd/state.h

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1

fs/nfsd/xdr4.h

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