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-rw-r--r--fs/nfsd/stats.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/fs/nfsd/stats.h b/fs/nfsd/stats.h
new file mode 100644
index 0000000000..cf5524e7ca
--- /dev/null
+++ b/fs/nfsd/stats.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Statistics for NFS server.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+#ifndef _NFSD_STATS_H
+#define _NFSD_STATS_H
+
+#include <uapi/linux/nfsd/stats.h>
+#include <linux/percpu_counter.h>
+
+
+enum {
+ NFSD_STATS_RC_HITS, /* repcache hits */
+ NFSD_STATS_RC_MISSES, /* repcache misses */
+ NFSD_STATS_RC_NOCACHE, /* uncached reqs */
+ NFSD_STATS_FH_STALE, /* FH stale error */
+ NFSD_STATS_IO_READ, /* bytes returned to read requests */
+ NFSD_STATS_IO_WRITE, /* bytes passed in write requests */
+#ifdef CONFIG_NFSD_V4
+ NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
+ NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
+#define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
+ NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */
+#endif
+ NFSD_STATS_COUNTERS_NUM
+};
+
+struct nfsd_stats {
+ struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
+
+ atomic_t th_cnt; /* number of available threads */
+};
+
+extern struct nfsd_stats nfsdstats;
+
+extern struct svc_stat nfsd_svcstats;
+
+int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
+void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
+void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
+int nfsd_stat_init(void);
+void nfsd_stat_shutdown(void);
+
+static inline void nfsd_stats_rc_hits_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
+}
+
+static inline void nfsd_stats_rc_misses_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
+}
+
+static inline void nfsd_stats_rc_nocache_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
+}
+
+static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
+ if (exp)
+ percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
+}
+
+static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
+{
+ percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
+ if (exp)
+ percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
+}
+
+static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
+{
+ percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
+ if (exp)
+ percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
+}
+
+static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
+{
+ percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
+}
+
+static inline void nfsd_stats_drc_mem_usage_add(struct nfsd_net *nn, s64 amount)
+{
+ percpu_counter_add(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
+}
+
+static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
+{
+ percpu_counter_sub(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
+}
+
+#ifdef CONFIG_NFSD_V4
+static inline void nfsd_stats_wdeleg_getattr_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]);
+}
+#endif
+#endif /* _NFSD_STATS_H */