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NFSv4.1: Ping server when our session table limits are too high
If the server requests a lower target_highest_slotid, then ensure that we ping it with at least one RPC call containing an appropriate SEQUENCE op. This ensures that the server won't need to send a recall callback in order to shrink the slot table. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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0ca3f4825a
commit
c10e449827
3 changed files with 23 additions and 3 deletions
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@ -321,6 +321,7 @@ int nfs41_discover_server_trunking(struct nfs_client *clp,
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struct nfs_client **, struct rpc_cred *);
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extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
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extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp);
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extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp);
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#else
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static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
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@ -389,6 +389,7 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
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{
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struct nfs4_session *session;
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struct nfs4_slot_table *tbl;
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bool send_new_highest_used_slotid = false;
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if (!res->sr_slot) {
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/* just wake up the next guy waiting since
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@ -400,12 +401,25 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
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session = tbl->session;
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spin_lock(&tbl->slot_tbl_lock);
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/* Be nice to the server: try to ensure that the last transmitted
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* value for highest_user_slotid <= target_highest_slotid
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*/
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if (tbl->highest_used_slotid > tbl->target_highest_slotid)
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send_new_highest_used_slotid = true;
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nfs4_free_slot(tbl, res->sr_slot);
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if (!nfs4_session_draining(session))
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rpc_wake_up_first(&tbl->slot_tbl_waitq,
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nfs4_set_task_privileged, NULL);
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if (tbl->highest_used_slotid != NFS4_NO_SLOT)
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send_new_highest_used_slotid = false;
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if (!nfs4_session_draining(session)) {
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if (rpc_wake_up_first(&tbl->slot_tbl_waitq,
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nfs4_set_task_privileged, NULL) != NULL)
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send_new_highest_used_slotid = false;
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}
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spin_unlock(&tbl->slot_tbl_lock);
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res->sr_slot = NULL;
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if (send_new_highest_used_slotid)
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nfs41_server_notify_highest_slotid_update(session->clp);
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}
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static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
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@ -1961,6 +1961,11 @@ void nfs41_server_notify_target_slotid_update(struct nfs_client *clp)
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nfs41_ping_server(clp);
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}
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void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp)
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{
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nfs41_ping_server(clp);
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}
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static void nfs4_reset_all_state(struct nfs_client *clp)
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{
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if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
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