1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #define FSCACHE_DEBUG_LEVEL CACHE
9 #include <linux/proc_fs.h>
10 #include <linux/seq_file.h>
16 atomic_t fscache_n_volumes
;
17 atomic_t fscache_n_volumes_collision
;
18 atomic_t fscache_n_volumes_nomem
;
19 atomic_t fscache_n_cookies
;
20 atomic_t fscache_n_cookies_lru
;
21 atomic_t fscache_n_cookies_lru_expired
;
22 atomic_t fscache_n_cookies_lru_removed
;
23 atomic_t fscache_n_cookies_lru_dropped
;
25 atomic_t fscache_n_acquires
;
26 atomic_t fscache_n_acquires_ok
;
27 atomic_t fscache_n_acquires_oom
;
29 atomic_t fscache_n_invalidates
;
31 atomic_t fscache_n_updates
;
32 EXPORT_SYMBOL(fscache_n_updates
);
34 atomic_t fscache_n_relinquishes
;
35 atomic_t fscache_n_relinquishes_retire
;
36 atomic_t fscache_n_relinquishes_dropped
;
38 atomic_t fscache_n_resizes
;
39 atomic_t fscache_n_resizes_null
;
41 atomic_t fscache_n_read
;
42 EXPORT_SYMBOL(fscache_n_read
);
43 atomic_t fscache_n_write
;
44 EXPORT_SYMBOL(fscache_n_write
);
45 atomic_t fscache_n_no_write_space
;
46 EXPORT_SYMBOL(fscache_n_no_write_space
);
47 atomic_t fscache_n_no_create_space
;
48 EXPORT_SYMBOL(fscache_n_no_create_space
);
49 atomic_t fscache_n_culled
;
50 EXPORT_SYMBOL(fscache_n_culled
);
53 * display the general statistics
55 int fscache_stats_show(struct seq_file
*m
, void *v
)
57 seq_puts(m
, "FS-Cache statistics\n");
58 seq_printf(m
, "Cookies: n=%d v=%d vcol=%u voom=%u\n",
59 atomic_read(&fscache_n_cookies
),
60 atomic_read(&fscache_n_volumes
),
61 atomic_read(&fscache_n_volumes_collision
),
62 atomic_read(&fscache_n_volumes_nomem
)
65 seq_printf(m
, "Acquire: n=%u ok=%u oom=%u\n",
66 atomic_read(&fscache_n_acquires
),
67 atomic_read(&fscache_n_acquires_ok
),
68 atomic_read(&fscache_n_acquires_oom
));
70 seq_printf(m
, "LRU : n=%u exp=%u rmv=%u drp=%u at=%ld\n",
71 atomic_read(&fscache_n_cookies_lru
),
72 atomic_read(&fscache_n_cookies_lru_expired
),
73 atomic_read(&fscache_n_cookies_lru_removed
),
74 atomic_read(&fscache_n_cookies_lru_dropped
),
75 timer_pending(&fscache_cookie_lru_timer
) ?
76 fscache_cookie_lru_timer
.expires
- jiffies
: 0);
78 seq_printf(m
, "Invals : n=%u\n",
79 atomic_read(&fscache_n_invalidates
));
81 seq_printf(m
, "Updates: n=%u rsz=%u rsn=%u\n",
82 atomic_read(&fscache_n_updates
),
83 atomic_read(&fscache_n_resizes
),
84 atomic_read(&fscache_n_resizes_null
));
86 seq_printf(m
, "Relinqs: n=%u rtr=%u drop=%u\n",
87 atomic_read(&fscache_n_relinquishes
),
88 atomic_read(&fscache_n_relinquishes_retire
),
89 atomic_read(&fscache_n_relinquishes_dropped
));
91 seq_printf(m
, "NoSpace: nwr=%u ncr=%u cull=%u\n",
92 atomic_read(&fscache_n_no_write_space
),
93 atomic_read(&fscache_n_no_create_space
),
94 atomic_read(&fscache_n_culled
));
96 seq_printf(m
, "IO : rd=%u wr=%u\n",
97 atomic_read(&fscache_n_read
),
98 atomic_read(&fscache_n_write
));