projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1e1236b8 DH |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* FS-Cache statistics viewing interface | |
| 3 | * | |
| 4 | * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. | |
| 5 | * Written by David Howells (dhowells@redhat.com) | |
| 6 | */ | |
| 7 | ||
| 8 | #define FSCACHE_DEBUG_LEVEL CACHE | |
| 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 | if (!proc_mkdir("fs/fscache", NULL)) | |
| 20 | goto error_dir; | |
| 21 | ||
| 9549332d DH |
22 | if (!proc_create_seq("fs/fscache/caches", S_IFREG | 0444, NULL, |
| 23 | &fscache_caches_seq_ops)) | |
| 24 | goto error; | |
| 25 | ||
| 62ab6335 DH |
26 | if (!proc_create_seq("fs/fscache/volumes", S_IFREG | 0444, NULL, |
| 27 | &fscache_volumes_seq_ops)) | |
| 28 | goto error; | |
| 29 | ||
| 7f3283ab DH |
30 | if (!proc_create_seq("fs/fscache/cookies", S_IFREG | 0444, NULL, |
| 31 | &fscache_cookies_seq_ops)) | |
| 32 | goto error; | |
| 33 | ||
| 1e1236b8 DH |
34 | #ifdef CONFIG_FSCACHE_STATS |
| 35 | if (!proc_create_single("fs/fscache/stats", S_IFREG | 0444, NULL, | |
| 36 | fscache_stats_show)) | |
| 37 | goto error; | |
| 38 | #endif | |
| 39 | ||
| 40 | return 0; | |
| 41 | ||
| 42 | error: | |
| 43 | remove_proc_entry("fs/fscache", NULL); | |
| 44 | error_dir: | |
| 45 | return -ENOMEM; | |
| 46 | } | |
| 47 | ||
| 48 | /* | |
| 49 | * clean up the /proc/fs/fscache/ directory | |
| 50 | */ | |
| 51 | void fscache_proc_cleanup(void) | |
| 52 | { | |
| 53 | remove_proc_subtree("fs/fscache", NULL); | |
| 54 | } |