[PATCH v2 3/4] NFSD: Name directory delegations in the CB_RECALL_ANY type mask

RFC 8881 Section 20.6.3 distinguishes an NFSv4.1 server
implementation that shares one pool among all classes of recallable
objects from one that keeps separate pools per class. NFSD falls
in the former category.

The CB_RECALL_ANY operation's craa_type_mask argument names the
types of objects in the recallable resource pool, but NFSD's
implementation does not name directory delegations, even though
they are allocated through __alloc_init_deleg(), they are counted
against the max_delegations budget, and the state shrinker reclaims
them.

Add RCA4_TYPE_MASK_DIR_DLG to craa_type_mask so clients that
implement directory delegations consider them when choosing which
delegations to return.

Signed-off-by: Chuck Lever <[email protected]>
---
 fs/nfsd/nfs4state.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2ddc77ac7312..3017a93261ff 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -7969,7 +7969,8 @@ deleg_reaper(struct nfsd_net *nn)
 		clp->cl_ra_time = ktime_get_boottime_seconds();
 		clp->cl_ra->ra_keep = 0;
 		clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG) |
-						BIT(RCA4_TYPE_MASK_WDATA_DLG);
+						BIT(RCA4_TYPE_MASK_WDATA_DLG) |
+						BIT(RCA4_TYPE_MASK_DIR_DLG);
 		trace_nfsd_cb_recall_any(clp->cl_ra);
 		nfsd4_run_cb(&clp->cl_ra->ra_cb);
 	}

-- 
2.54.0