git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 7394daa8 DH |
1 | /* FS-Cache statistics viewing interface |
| 2 | * | |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the License, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #define FSCACHE_DEBUG_LEVEL OPERATION | |
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/proc_fs.h> | |
| 15 | #include <linux/seq_file.h> | |
| 16 | #include "internal.h" | |
| 17 | ||
| 18 | /* | |
| 19 | * initialise the /proc/fs/fscache/ directory | |
| 20 | */ | |
| 21 | int __init fscache_proc_init(void) | |
| 22 | { | |
| 23 | _enter(""); | |
| 24 | ||
| 25 | if (!proc_mkdir("fs/fscache", NULL)) | |
| 26 | goto error_dir; | |
| 27 | ||
| 28 | #ifdef CONFIG_FSCACHE_STATS | |
| 29 | if (!proc_create("fs/fscache/stats", S_IFREG | 0444, NULL, | |
| 30 | &fscache_stats_fops)) | |
| 31 | goto error_stats; | |
| 32 | #endif | |
| 33 | ||
| 34 | #ifdef CONFIG_FSCACHE_HISTOGRAM | |
| 35 | if (!proc_create("fs/fscache/histogram", S_IFREG | 0444, NULL, | |
| 36 | &fscache_histogram_fops)) | |
| 37 | goto error_histogram; | |
| 38 | #endif | |
| 39 | ||
| 4fbf4291 DH |
40 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
| 41 | if (!proc_create("fs/fscache/objects", S_IFREG | 0444, NULL, | |
| 42 | &fscache_objlist_fops)) | |
| 43 | goto error_objects; | |
| 44 | #endif | |
| 45 | ||
| 7394daa8 DH |
46 | _leave(" = 0"); |
| 47 | return 0; | |
| 48 | ||
| 4fbf4291 DH |
49 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
| 50 | error_objects: | |
| 51 | #endif | |
| 7394daa8 | 52 | #ifdef CONFIG_FSCACHE_HISTOGRAM |
| 4fbf4291 | 53 | remove_proc_entry("fs/fscache/histogram", NULL); |
| 7394daa8 DH |
54 | error_histogram: |
| 55 | #endif | |
| 56 | #ifdef CONFIG_FSCACHE_STATS | |
| 57 | remove_proc_entry("fs/fscache/stats", NULL); | |
| 58 | error_stats: | |
| 59 | #endif | |
| 60 | remove_proc_entry("fs/fscache", NULL); | |
| 61 | error_dir: | |
| 62 | _leave(" = -ENOMEM"); | |
| 63 | return -ENOMEM; | |
| 64 | } | |
| 65 | ||
| 66 | /* | |
| 67 | * clean up the /proc/fs/fscache/ directory | |
| 68 | */ | |
| 69 | void fscache_proc_cleanup(void) | |
| 70 | { | |
| 4fbf4291 DH |
71 | #ifdef CONFIG_FSCACHE_OBJECT_LIST |
| 72 | remove_proc_entry("fs/fscache/objects", NULL); | |
| 73 | #endif | |
| 7394daa8 DH |
74 | #ifdef CONFIG_FSCACHE_HISTOGRAM |
| 75 | remove_proc_entry("fs/fscache/histogram", NULL); | |
| 76 | #endif | |
| 77 | #ifdef CONFIG_FSCACHE_STATS | |
| 78 | remove_proc_entry("fs/fscache/stats", NULL); | |
| 79 | #endif | |
| 80 | remove_proc_entry("fs/fscache", NULL); | |
| 81 | } |