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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
7394daa8 DH |
2 | /* FS-Cache statistics viewing interface |
3 | * | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
7394daa8 DH |
6 | */ |
7 | ||
8 | #define FSCACHE_DEBUG_LEVEL OPERATION | |
9 | #include <linux/module.h> | |
10 | #include <linux/proc_fs.h> | |
11 | #include <linux/seq_file.h> | |
12 | #include "internal.h" | |
13 | ||
14 | /* | |
15 | * initialise the /proc/fs/fscache/ directory | |
16 | */ | |
17 | int __init fscache_proc_init(void) | |
18 | { | |
19 | _enter(""); | |
20 | ||
21 | if (!proc_mkdir("fs/fscache", NULL)) | |
22 | goto error_dir; | |
23 | ||
24 | #ifdef CONFIG_FSCACHE_STATS | |
3f3942ac CH |
25 | if (!proc_create_single("fs/fscache/stats", S_IFREG | 0444, NULL, |
26 | fscache_stats_show)) | |
7394daa8 DH |
27 | goto error_stats; |
28 | #endif | |
29 | ||
30 | #ifdef CONFIG_FSCACHE_HISTOGRAM | |
fddda2b7 CH |
31 | if (!proc_create_seq("fs/fscache/histogram", S_IFREG | 0444, NULL, |
32 | &fscache_histogram_ops)) | |
7394daa8 DH |
33 | goto error_histogram; |
34 | #endif | |
35 | ||
4fbf4291 DH |
36 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
37 | if (!proc_create("fs/fscache/objects", S_IFREG | 0444, NULL, | |
38 | &fscache_objlist_fops)) | |
39 | goto error_objects; | |
40 | #endif | |
41 | ||
7394daa8 DH |
42 | _leave(" = 0"); |
43 | return 0; | |
44 | ||
4fbf4291 DH |
45 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
46 | error_objects: | |
47 | #endif | |
7394daa8 | 48 | #ifdef CONFIG_FSCACHE_HISTOGRAM |
4fbf4291 | 49 | remove_proc_entry("fs/fscache/histogram", NULL); |
7394daa8 DH |
50 | error_histogram: |
51 | #endif | |
52 | #ifdef CONFIG_FSCACHE_STATS | |
53 | remove_proc_entry("fs/fscache/stats", NULL); | |
54 | error_stats: | |
55 | #endif | |
56 | remove_proc_entry("fs/fscache", NULL); | |
57 | error_dir: | |
58 | _leave(" = -ENOMEM"); | |
59 | return -ENOMEM; | |
60 | } | |
61 | ||
62 | /* | |
63 | * clean up the /proc/fs/fscache/ directory | |
64 | */ | |
65 | void fscache_proc_cleanup(void) | |
66 | { | |
4fbf4291 DH |
67 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
68 | remove_proc_entry("fs/fscache/objects", NULL); | |
69 | #endif | |
7394daa8 DH |
70 | #ifdef CONFIG_FSCACHE_HISTOGRAM |
71 | remove_proc_entry("fs/fscache/histogram", NULL); | |
72 | #endif | |
73 | #ifdef CONFIG_FSCACHE_STATS | |
74 | remove_proc_entry("fs/fscache/stats", NULL); | |
75 | #endif | |
76 | remove_proc_entry("fs/fscache", NULL); | |
77 | } |