projects / mirror_ubuntu-hirsute-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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, | |
| 97a32539 | 38 | &fscache_objlist_proc_ops)) |
| 4fbf4291 DH |
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 | } |