49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021. Huawei Technologies Co., Ltd. All rights reserved.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "wear.h"
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#include <linux/vmalloc.h>
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#include "euler.h"
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void wear_init(struct super_block *sb)
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{
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struct eufs_sb_info *sbi = EUFS_SB(sb);
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if (!wear_control)
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return;
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sbi->page_wears = vmalloc(sizeof(struct page_wear) * sbi->npages);
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memset(sbi->page_wears, 0, sizeof(struct page_wear) * sbi->npages);
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}
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void wear_fini(struct super_block *sb)
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{
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struct eufs_sb_info *sbi = EUFS_SB(sb);
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if (!wear_control)
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return;
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if (sbi->page_wears)
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vfree(sbi->page_wears);
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sbi->page_wears = NULL;
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}
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/* Return whether it's in a good state */
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bool wear_inc(struct super_block *sb, void *page)
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{
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struct eufs_sb_info *sbi = EUFS_SB(sb);
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if (!wear_control)
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return true;
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return sbi->page_wears[(page - sbi->data_start) / PAGE_SIZE].wear++ <=
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wear_threshold;
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}
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