[PATCH 6.1.y 17/18] nfsd: remove nfsd_stats, make th_cnt a global counter

cel
2024-08-10T20:01:25Z

From: Josef Bacik <josef@toxicpanda.com>

[ Upstream commit e41ee44cc6a473b1f414031782c3b4283d7f3e5f ]

This is the last global stat, take it out of the nfsd_stats struct and
make it a global part of nfsd, report it the same as always.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/nfsd.h | 1 +
fs/nfsd/nfssvc.c | 5 +++--
fs/nfsd/stats.c | 3 +--
fs/nfsd/stats.h | 6 ------
4 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index fa0144a74267..0e557fb60a0e 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -69,6 +69,7 @@ extern struct mutex nfsd_mutex;
extern spinlock_t nfsd_drc_lock;
extern unsigned long nfsd_drc_max_mem;
extern unsigned long nfsd_drc_mem_used;
+extern atomic_t nfsd_th_cnt; /* number of available threads */

extern const struct seq_operations nfs_exports_op;

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 5ddb1f36f82e..8b944620d798 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -34,6 +34,7 @@

#define NFSDDBG_FACILITY NFSDDBG_SVC

+atomic_t nfsd_th_cnt = ATOMIC_INIT(0);
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
@@ -955,7 +956,7 @@ nfsd(void *vrqstp)

current->fs->umask = 0;

- atomic_inc(&nfsdstats.th_cnt);
+ atomic_inc(&nfsd_th_cnt);

set_freezable();

@@ -979,7 +980,7 @@ nfsd(void *vrqstp)
validate_process_creds();
}

- atomic_dec(&nfsdstats.th_cnt);
+ atomic_dec(&nfsd_th_cnt);

out:
/* Take an extra ref so that the svc_put in svc_exit_thread()
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index fdc090284c8d..cd5e48382fba 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -27,7 +27,6 @@

#include "nfsd.h"

-struct nfsd_stats nfsdstats;
struct svc_stat nfsd_svcstats = {
.program = &nfsd_program,
};
@@ -47,7 +46,7 @@ static int nfsd_show(struct seq_file *seq, void *v)
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));

/* thread usage: */
- seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
+ seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt));

/* deprecated thread usage histogram stats */
for (i = 0; i < 10; i++)
diff --git a/fs/nfsd/stats.h b/fs/nfsd/stats.h
index 28f5c720e9b3..9b22b1ae929f 100644
--- a/fs/nfsd/stats.h
+++ b/fs/nfsd/stats.h
@@ -10,12 +10,6 @@
#include <uapi/linux/nfsd/stats.h>
#include <linux/percpu_counter.h>

-struct nfsd_stats {
- 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);
--
2.45.1