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