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// SPDX-License-Identifier: GPL-2.0-or-later
/* FS-Cache statistics
*
* Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#define FSCACHE_DEBUG_LEVEL CACHE
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "internal.h"
/*
* operation counters
*/
atomic_t fscache_n_volumes;
atomic_t fscache_n_volumes_collision;
atomic_t fscache_n_volumes_nomem;
atomic_t fscache_n_cookies;
atomic_t fscache_n_cookies_lru;
atomic_t fscache_n_cookies_lru_expired;
atomic_t fscache_n_cookies_lru_removed;
atomic_t fscache_n_cookies_lru_dropped;
atomic_t fscache_n_acquires;
atomic_t fscache_n_acquires_ok;
atomic_t fscache_n_acquires_oom;
atomic_t fscache_n_invalidates;
atomic_t fscache_n_updates;
EXPORT_SYMBOL(fscache_n_updates);
atomic_t fscache_n_relinquishes;
atomic_t fscache_n_relinquishes_retire;
atomic_t fscache_n_relinquishes_dropped;
atomic_t fscache_n_resizes;
atomic_t fscache_n_resizes_null;
atomic_t fscache_n_read;
EXPORT_SYMBOL(fscache_n_read);
atomic_t fscache_n_write;
EXPORT_SYMBOL(fscache_n_write);
atomic_t fscache_n_no_write_space;
EXPORT_SYMBOL(fscache_n_no_write_space);
atomic_t fscache_n_no_create_space;
EXPORT_SYMBOL(fscache_n_no_create_space);
atomic_t fscache_n_culled;
EXPORT_SYMBOL(fscache_n_culled);
/*
* display the general statistics
*/
int fscache_stats_show(struct seq_file *m)
{
seq_puts(m, "FS-Cache statistics\n");
seq_printf(m, "Cookies: n=%d v=%d vcol=%u voom=%u\n",
atomic_read(&fscache_n_cookies),
atomic_read(&fscache_n_volumes),
atomic_read(&fscache_n_volumes_collision),
atomic_read(&fscache_n_volumes_nomem)
);
seq_printf(m, "Acquire: n=%u ok=%u oom=%u\n",
atomic_read(&fscache_n_acquires),
atomic_read(&fscache_n_acquires_ok),
atomic_read(&fscache_n_acquires_oom));
seq_printf(m, "LRU : n=%u exp=%u rmv=%u drp=%u at=%ld\n",
atomic_read(&fscache_n_cookies_lru),
atomic_read(&fscache_n_cookies_lru_expired),
atomic_read(&fscache_n_cookies_lru_removed),
atomic_read(&fscache_n_cookies_lru_dropped),
timer_pending(&fscache_cookie_lru_timer) ?
fscache_cookie_lru_timer.expires - jiffies : 0);
seq_printf(m, "Invals : n=%u\n",
atomic_read(&fscache_n_invalidates));
seq_printf(m, "Updates: n=%u rsz=%u rsn=%u\n",
atomic_read(&fscache_n_updates),
atomic_read(&fscache_n_resizes),
atomic_read(&fscache_n_resizes_null));
seq_printf(m, "Relinqs: n=%u rtr=%u drop=%u\n",
atomic_read(&fscache_n_relinquishes),
atomic_read(&fscache_n_relinquishes_retire),
atomic_read(&fscache_n_relinquishes_dropped));
seq_printf(m, "NoSpace: nwr=%u ncr=%u cull=%u\n",
atomic_read(&fscache_n_no_write_space),
atomic_read(&fscache_n_no_create_space),
atomic_read(&fscache_n_culled));
seq_printf(m, "IO : rd=%u wr=%u\n",
atomic_read(&fscache_n_read),
atomic_read(&fscache_n_write));
return 0;
}
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