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https://gitee.com/openharmony/third_party_f2fs-tools
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fdd47b2ea7
This patch adds to support compression, introducing '-O compression' option to enable this feature in image. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/**
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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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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 unsigned int ADDRS_PER_PAGE(struct f2fs_sb_info *sbi,
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struct f2fs_node *node_blk, struct f2fs_node *inode_blk)
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{
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nid_t ino = le32_to_cpu(node_blk->footer.ino);
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unsigned int nblocks;
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if (IS_INODE(node_blk))
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return ADDRS_PER_INODE(&node_blk->i);
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if (!inode_blk) {
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struct node_info ni;
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inode_blk = calloc(BLOCK_SZ, 2);
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ASSERT(inode_blk);
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get_node_info(sbi, ino, &ni);
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ASSERT(dev_read_block(inode_blk, ni.blk_addr) >= 0);
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nblocks = ADDRS_PER_BLOCK(&inode_blk->i);
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free(inode_blk);
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} else {
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nblocks = ADDRS_PER_BLOCK(&inode_blk->i);
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}
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return nblocks;
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}
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static inline __le32 *blkaddr_in_inode(struct f2fs_node *node)
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{
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return node->i.i_addr + get_extra_isize(node);
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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) ? blkaddr_in_inode(node) : 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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static inline nid_t ino_of_node(struct f2fs_node *node_blk)
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{
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return le32_to_cpu(node_blk->footer.ino);
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}
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static inline __u64 cpver_of_node(struct f2fs_node *node_blk)
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{
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return le64_to_cpu(node_blk->footer.cp_ver);
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}
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static inline bool is_recoverable_dnode(struct f2fs_sb_info *sbi,
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struct f2fs_node *node_blk)
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{
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struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
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__u64 cp_ver = cur_cp_version(ckpt);
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/* Don't care crc part, if fsck.f2fs sets it. */
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if (is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
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return (cp_ver << 32) == (cpver_of_node(node_blk) << 32);
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if (is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
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cp_ver |= (cur_cp_crc(ckpt) << 32);
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return cp_ver == cpver_of_node(node_blk);
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}
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static inline block_t next_blkaddr_of_node(struct f2fs_node *node_blk)
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{
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return le32_to_cpu(node_blk->footer.next_blkaddr);
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}
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static inline int is_node(struct f2fs_node *node_blk, int type)
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{
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return le32_to_cpu(node_blk->footer.flag) & (1 << type);
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}
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#define is_fsync_dnode(node_blk) is_node(node_blk, FSYNC_BIT_SHIFT)
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#define is_dent_dnode(node_blk) is_node(node_blk, DENT_BIT_SHIFT)
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#endif
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