drivers/md/raid5-ppl.c

237 	struct ppl_header *pplhdr;
256 	pplhdr = page_address(io->header_page);
257 	clear_page(pplhdr);
258 	memset(pplhdr->reserved, 0xff, PPL_HDR_RESERVED);
259 	pplhdr->signature = cpu_to_le32(ppl_conf->signature);
262 	pplhdr->generation = cpu_to_le64(io->seq);
271 	struct ppl_header *pplhdr;
313 	pplhdr = page_address(io->header_page);
317 				&pplhdr->entries[io->entries_count - 1];
337 		e = &pplhdr->entries[io->entries_count++];
432 	struct ppl_header *pplhdr = page_address(io->header_page);
445 		struct ppl_header_entry *e = &pplhdr->entries[i];
456 	pplhdr->entries_count = cpu_to_le32(io->entries_count);
457 	pplhdr->checksum = cpu_to_le32(~crc32c(~0, pplhdr, PPL_HEADER_SIZE));
959 static int ppl_recover(struct ppl_log *log, struct ppl_header *pplhdr,
976 	for (i = 0; i < le32_to_cpu(pplhdr->entries_count); i++) {
977 		struct ppl_header_entry *e = &pplhdr->entries[i];
1038 	struct ppl_header *pplhdr;
1049 	pplhdr = page_address(page);
1053 	memset(pplhdr->reserved, 0xff, PPL_HDR_RESERVED);
1054 	pplhdr->signature = cpu_to_le32(log->ppl_conf->signature);
1055 	pplhdr->checksum = cpu_to_le32(~crc32c(~0, pplhdr, PAGE_SIZE));
1074 	struct ppl_header *pplhdr = NULL, *prev_pplhdr = NULL;
1101 			pplhdr = NULL;
1104 		pplhdr = page_address(page);
1107 		crc_stored = le32_to_cpu(pplhdr->checksum);
1108 		pplhdr->checksum = 0;
1109 		crc = ~crc32c(~0, pplhdr, PAGE_SIZE);
1115 			pplhdr = prev_pplhdr;
1120 		signature = le32_to_cpu(pplhdr->signature);
1132 			pplhdr = prev_pplhdr;
1138 		    le64_to_cpu(pplhdr->generation)) {
1140 			pplhdr = prev_pplhdr;
1146 		prev_pplhdr = pplhdr;
1151 		for (i = 0; i < le32_to_cpu(pplhdr->entries_count); i++)
1153 			    le32_to_cpu(pplhdr->entries[i].pp_size) >> 9;
1158 	if (!pplhdr)
1163 		    le64_to_cpu(pplhdr->generation));
1166 	if (pplhdr && !mddev->pers && mddev->resync_offset != MaxSector)
1167 		ret = ppl_recover(log, pplhdr, pplhdr_offset);