mirror of https://gitee.com/openkylin/linux.git
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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("fs/fscache/stats", S_IFREG | 0444, NULL,
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&fscache_stats_fops))
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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("fs/fscache/histogram", S_IFREG | 0444, NULL,
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&fscache_histogram_fops))
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goto error_histogram;
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#endif
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_leave(" = 0");
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return 0;
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#ifdef CONFIG_FSCACHE_HISTOGRAM
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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_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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