81 lines
3.0 KiB
C
81 lines
3.0 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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#ifndef EUFS_CONST_H
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#define EUFS_CONST_H
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/* EULER */
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#define EUFS_SUPER_MAGIC 0x50C9
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/* Mount flags */
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#define EUFS_MOUNT_ERRORS_RO 0x000001 /* Remount fs ro on errors */
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#define EUFS_MOUNT_ERRORS_PANIC 0x000002 /* Panic on errors */
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#define EUFS_MOUNT_FORMAT 0x000004 /* was FS formatted on mount? */
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#define NULL_ADDR ((u64)-1ll)
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#define NULL_VAL (0)
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#define NULL_ADDR_PTR ((void *)(NULL_ADDR))
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/* FS Limits */
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#define EUFS_MAX_NAME_LEN (255)
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#define EUFS_LINK_MAX (32000) /* max links to a file */
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/* layout: hash_len (u64) + sym_link + trailing zero */
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#define EUFS_MAX_SYMLINK_LEN (PAGE_SIZE - sizeof(u64) - 1)
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#define EUFS_SYMLINK_HASHLEN_LEN(hashlen) (((hashlen) >> 48) & 0xfff)
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#define EUFS_SYMLINK_SIZE(len) ((len) + sizeof(u64) + 1)
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#define EUFS_BLOCK_SIZE (4096)
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#define EUFS_BLOCK_SIZE_BITS (12)
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/* The initial height is 0 when the file tree contains no or one block */
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#define EUFS_MAX_FILE_TREE_HEIGHT 3
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#define EUFS_FILE_TREE_DEGREE_SHIFT 9
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#define EUFS_FILE_TREE_DEGREE (1U << EUFS_FILE_TREE_DEGREE_SHIFT)
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#define EUFS_MAX_FILE_BLK_CNT \
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(1ll << (EUFS_MAX_FILE_TREE_HEIGHT * EUFS_FILE_TREE_DEGREE_SHIFT))
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#define EUFS_MAX_FILE_SIZE (4096ll * EUFS_MAX_FILE_BLK_CNT)
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#define EUFS_POISON_POINTER ((void *)0x1010101010101010UL)
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#define EUFS_POISON_VALUE ((u64)0x1010101010101010UL)
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#define CACHELINE_SIZE (64)
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#define EUFS_ALLOC_BLOCKS_ZERO_NONE (0x0) /* Zero none NULL_ADDR pages */
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#define EUFS_ALLOC_BLOCKS_ZERO_ALL (0x1) /* Zero all NULL_ADDR pages */
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#define EUFS_ALLOC_BLOCKS_ZERO_EDGE (0x2) /* Zero edge NULL_ADDR pages */
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#define EUFS_INODE_SIZE (CACHELINE_SIZE * 2)
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#define NV_DICT_CAPACITY (512ULL)
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/*
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* EOC stands for "End Of Chain".
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*
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* When volatile bucket (namely table[idx]) is EUFS_DIR_EOC_PTR,
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* it means that both volatile bucket and persist bucket are empty.
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* When volatile bucket is NULL, it just means that volatile
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* bucket is empty.
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*
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* When volatile_next is EUFS_DIR_EOC, it means current entry is
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* the last one in the chain although its next may still points
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* to an entry (because the setting and persistence of next are
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* deferred). When volatile_next is NULL, it means next should be
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* checked to ensure whether or not the current entry is the last
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* one in the chain.
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*/
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#define EUFS_DIR_EOC ((u64)-1)
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#define EUFS_DIR_EOC_PTR ((void *)EUFS_DIR_EOC)
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/* DIR DELeted NEW dentry */
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#define EUFS_DIR_DELNEW ((u64)0x3030303030303030UL)
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#endif /* EUFS_CONST_H */
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