From bad4c585ccaaf53c23fbf2b221b88c24576a80fd Mon Sep 17 00:00:00 2001 From: Dai Ngo Date: Sun, 3 Mar 2024 14:23:02 -0800 Subject: NFSD: send OP_CB_RECALL_ANY to clients when number of delegations reaches its limit The NFS server should ask clients to voluntarily return unused delegations when the number of granted delegations reaches the max_delegations. This is so that the server can continue to grant delegations for new requests. Signed-off-by: Dai Ngo Reviewed-by: Jeff Layton Tested-by: Chen Hanxiao Signed-off-by: Chuck Lever --- fs/nfsd/nfs4state.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index aee12adf0598..ee9aa4843443 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -87,6 +87,7 @@ static void nfs4_free_ol_stateid(struct nfs4_stid *stid); void nfsd4_end_grace(struct nfsd_net *nn); static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); static void nfsd4_file_hash_remove(struct nfs4_file *fi); +static void deleg_reaper(struct nfsd_net *nn); /* Locking: */ @@ -6550,6 +6551,8 @@ nfs4_laundromat(struct nfsd_net *nn) /* service the server-to-server copy delayed unmount list */ nfsd4_ssc_expire_umount(nn); #endif + if (atomic_long_read(&num_delegations) >= max_delegations) + deleg_reaper(nn); out: return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); } -- cgit v1.2.3