f2fs: introduce get_checkpoint_version for cleanup
There exists almost same codes when get the value of pre_version and cur_version in function validate_checkpoint, this patch adds get_checkpoint_version to clean up redundant codes. Signed-off-by: Tiezhu Yang <kernelpatch@126.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -663,45 +663,55 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
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}
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}
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static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
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struct f2fs_checkpoint **cp_block, struct page **cp_page,
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unsigned long long *version)
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{
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unsigned long blk_size = sbi->blocksize;
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size_t crc_offset = 0;
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__u32 crc = 0;
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*cp_page = get_meta_page(sbi, cp_addr);
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*cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
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crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
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if (crc_offset >= blk_size) {
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f2fs_msg(sbi->sb, KERN_WARNING,
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"invalid crc_offset: %zu", crc_offset);
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return -EINVAL;
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}
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crc = le32_to_cpu(*((__le32 *)((unsigned char *)*cp_block
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+ crc_offset)));
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if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) {
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f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
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return -EINVAL;
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}
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*version = cur_cp_version(*cp_block);
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return 0;
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}
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static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
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block_t cp_addr, unsigned long long *version)
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{
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struct page *cp_page_1, *cp_page_2 = NULL;
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unsigned long blk_size = sbi->blocksize;
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struct f2fs_checkpoint *cp_block;
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struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
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struct f2fs_checkpoint *cp_block = NULL;
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unsigned long long cur_version = 0, pre_version = 0;
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size_t crc_offset;
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__u32 crc = 0;
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int err;
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/* Read the 1st cp block in this CP pack */
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cp_page_1 = get_meta_page(sbi, cp_addr);
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/* get the version number */
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cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
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crc_offset = le32_to_cpu(cp_block->checksum_offset);
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if (crc_offset >= blk_size)
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err = get_checkpoint_version(sbi, cp_addr, &cp_block,
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&cp_page_1, version);
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if (err)
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goto invalid_cp1;
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pre_version = *version;
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crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
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if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
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goto invalid_cp1;
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pre_version = cur_cp_version(cp_block);
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/* Read the 2nd cp block in this CP pack */
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cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
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cp_page_2 = get_meta_page(sbi, cp_addr);
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cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
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crc_offset = le32_to_cpu(cp_block->checksum_offset);
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if (crc_offset >= blk_size)
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err = get_checkpoint_version(sbi, cp_addr, &cp_block,
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&cp_page_2, version);
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if (err)
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goto invalid_cp2;
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crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
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if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
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goto invalid_cp2;
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cur_version = cur_cp_version(cp_block);
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cur_version = *version;
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if (cur_version == pre_version) {
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*version = cur_version;
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