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- // SPDX-License-Identifier: GPL-2.0-or-later
- /* FS-Cache statistics viewing interface
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- */
- #define FSCACHE_DEBUG_LEVEL OPERATION
- #include <linux/module.h>
- #include <linux/proc_fs.h>
- #include <linux/seq_file.h>
- #include "internal.h"
- /*
- * initialise the /proc/fs/fscache/ directory
- */
- int __init fscache_proc_init(void)
- {
- _enter("");
- if (!proc_mkdir("fs/fscache", NULL))
- goto error_dir;
- #ifdef CONFIG_FSCACHE_STATS
- if (!proc_create_single("fs/fscache/stats", S_IFREG | 0444, NULL,
- fscache_stats_show))
- goto error_stats;
- #endif
- #ifdef CONFIG_FSCACHE_HISTOGRAM
- if (!proc_create_seq("fs/fscache/histogram", S_IFREG | 0444, NULL,
- &fscache_histogram_ops))
- goto error_histogram;
- #endif
- #ifdef CONFIG_FSCACHE_OBJECT_LIST
- if (!proc_create("fs/fscache/objects", S_IFREG | 0444, NULL,
- &fscache_objlist_proc_ops))
- goto error_objects;
- #endif
- _leave(" = 0");
- return 0;
- #ifdef CONFIG_FSCACHE_OBJECT_LIST
- error_objects:
- #endif
- #ifdef CONFIG_FSCACHE_HISTOGRAM
- remove_proc_entry("fs/fscache/histogram", NULL);
- error_histogram:
- #endif
- #ifdef CONFIG_FSCACHE_STATS
- remove_proc_entry("fs/fscache/stats", NULL);
- error_stats:
- #endif
- remove_proc_entry("fs/fscache", NULL);
- error_dir:
- _leave(" = -ENOMEM");
- return -ENOMEM;
- }
- /*
- * clean up the /proc/fs/fscache/ directory
- */
- void fscache_proc_cleanup(void)
- {
- #ifdef CONFIG_FSCACHE_OBJECT_LIST
- remove_proc_entry("fs/fscache/objects", NULL);
- #endif
- #ifdef CONFIG_FSCACHE_HISTOGRAM
- remove_proc_entry("fs/fscache/histogram", NULL);
- #endif
- #ifdef CONFIG_FSCACHE_STATS
- remove_proc_entry("fs/fscache/stats", NULL);
- #endif
- remove_proc_entry("fs/fscache", NULL);
- }
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