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If the GETATTR request on a file that has write delegation in effect and the request attributes include the change info and size attribute then the write delegation is recalled. If the delegation is returned within 30ms then the GETATTR is serviced as normal otherwise the NFS4ERR_DELAY error is returned for the GETATTR. Add counter for write delegation recall due to conflict GETATTR. This is used to evaluate the need to implement CB_GETATTR to adoid recalling the delegation with conflit GETATTR. Signed-off-by: Dai Ngo <dai.ngo@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
103 lines
3 KiB
C
103 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Statistics for NFS server.
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*
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* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef _NFSD_STATS_H
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#define _NFSD_STATS_H
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#include <uapi/linux/nfsd/stats.h>
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#include <linux/percpu_counter.h>
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enum {
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NFSD_STATS_RC_HITS, /* repcache hits */
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NFSD_STATS_RC_MISSES, /* repcache misses */
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NFSD_STATS_RC_NOCACHE, /* uncached reqs */
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NFSD_STATS_FH_STALE, /* FH stale error */
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NFSD_STATS_IO_READ, /* bytes returned to read requests */
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NFSD_STATS_IO_WRITE, /* bytes passed in write requests */
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#ifdef CONFIG_NFSD_V4
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NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
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NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
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#define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
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NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */
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#endif
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NFSD_STATS_COUNTERS_NUM
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};
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struct nfsd_stats {
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struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
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atomic_t th_cnt; /* number of available threads */
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};
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extern struct nfsd_stats nfsdstats;
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extern struct svc_stat nfsd_svcstats;
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int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
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void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
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void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
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int nfsd_stat_init(void);
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void nfsd_stat_shutdown(void);
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static inline void nfsd_stats_rc_hits_inc(void)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
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}
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static inline void nfsd_stats_rc_misses_inc(void)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
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}
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static inline void nfsd_stats_rc_nocache_inc(void)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
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}
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static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
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if (exp)
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percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
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}
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static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
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{
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percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
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if (exp)
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percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
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}
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static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
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{
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percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
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if (exp)
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percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
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}
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static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
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{
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percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
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}
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static inline void nfsd_stats_drc_mem_usage_add(struct nfsd_net *nn, s64 amount)
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{
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percpu_counter_add(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
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}
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static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
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{
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percpu_counter_sub(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
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}
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#ifdef CONFIG_NFSD_V4
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static inline void nfsd_stats_wdeleg_getattr_inc(void)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]);
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}
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#endif
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#endif /* _NFSD_STATS_H */
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