mirror of
https://gitee.com/openharmony/third_party_f2fs-tools
synced 2024-11-23 18:19:43 +00:00
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
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/**
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* node.h
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*
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* Many parts of codes are copied from Linux kernel/fs/f2fs.
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*
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* Copyright (C) 2015 Huawei Ltd.
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* Witten by:
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* Hou Pengyang <houpengyang@huawei.com>
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* Liu Shuoran <liushuoran@huawei.com>
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* Jaegeuk Kim <jaegeuk@kernel.org>
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*
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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 as
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* published by the Free Software Foundation.
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*/
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#ifndef _NODE_H_
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#define _NODE_H_
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#include "fsck.h"
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#define ADDRS_PER_PAGE(page) \
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(IS_INODE(page) ? ADDRS_PER_INODE(&page->i) : ADDRS_PER_BLOCK)
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static inline int IS_INODE(struct f2fs_node *node)
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{
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return ((node)->footer.nid == (node)->footer.ino);
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}
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static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
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{
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return IS_INODE(node) ? node->i.i_addr : node->dn.addr;
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}
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static inline block_t datablock_addr(struct f2fs_node *node_page,
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unsigned int offset)
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{
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__le32 *addr_array;
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ASSERT(node_page);
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addr_array = blkaddr_in_node(node_page);
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return le32_to_cpu(addr_array[offset]);
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}
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static inline void set_nid(struct f2fs_node * rn, int off, nid_t nid, int i)
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{
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if (i)
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rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
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else
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rn->in.nid[off] = cpu_to_le32(nid);
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}
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static inline nid_t get_nid(struct f2fs_node * rn, int off, int i)
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{
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if (i)
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return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
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else
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return le32_to_cpu(rn->in.nid[off]);
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}
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enum {
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ALLOC_NODE, /* allocate a new node page if needed */
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LOOKUP_NODE, /* lookup up a node without readahead */
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LOOKUP_NODE_RA,
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};
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static inline void set_new_dnode(struct dnode_of_data *dn,
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struct f2fs_node *iblk, struct f2fs_node *nblk, nid_t nid)
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{
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memset(dn, 0, sizeof(*dn));
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dn->inode_blk = iblk;
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dn->node_blk = nblk;
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dn->nid = nid;
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dn->idirty = 0;
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dn->ndirty = 0;
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}
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static inline void inc_inode_blocks(struct dnode_of_data *dn)
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{
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u64 blocks = le64_to_cpu(dn->inode_blk->i.i_blocks);
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dn->inode_blk->i.i_blocks = cpu_to_le64(blocks + 1);
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dn->idirty = 1;
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}
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static inline int IS_DNODE(struct f2fs_node *node_page)
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{
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unsigned int ofs = ofs_of_node(node_page);
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if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
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ofs == 5 + 2 * NIDS_PER_BLOCK)
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return 0;
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if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
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ofs -= 6 + 2 * NIDS_PER_BLOCK;
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if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
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return 0;
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}
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return 1;
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}
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#endif
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