static void gptupdate(const char *which, struct dsk *dskp, struct gpt_hdr *hdr, struct gpt_ent *table) { int entries_per_sec, firstent; daddr_t slba; /* * We need to update the following for both primary and backup GPT: * 1. Sector on disk that contains current partition. * 2. Partition table checksum. * 3. Header checksum. * 4. Header on disk. */ entries_per_sec = DEV_BSIZE / hdr->hdr_entsz; slba = curent / entries_per_sec; firstent = slba * entries_per_sec; bcopy(&table[firstent], secbuf, DEV_BSIZE); slba += hdr->hdr_lba_table; if (drvwrite(dskp, secbuf, slba, 1)) { printf("%s: unable to update %s GPT partition table\n", BOOTPROG, which); return; } hdr->hdr_crc_table = crc32(table, hdr->hdr_entries * hdr->hdr_entsz); hdr->hdr_crc_self = 0; hdr->hdr_crc_self = crc32(hdr, hdr->hdr_size); bzero(secbuf, DEV_BSIZE); bcopy(hdr, secbuf, hdr->hdr_size); if (drvwrite(dskp, secbuf, hdr->hdr_lba_self, 1)) { printf("%s: unable to update %s GPT header\n", BOOTPROG, which); return; } }
static void gptbootconv(const char *which, struct dsk *dskp, struct gpt_hdr *hdr, struct gpt_ent *table) { struct gpt_ent *ent; daddr_t slba; int table_updated, sector_updated; int entries_per_sec, nent, part; table_updated = 0; entries_per_sec = DEV_BSIZE / hdr->hdr_entsz; for (nent = 0, slba = hdr->hdr_lba_table; slba < hdr->hdr_lba_table + hdr->hdr_entries / entries_per_sec; slba++, nent += entries_per_sec) { sector_updated = 0; for (part = 0; part < entries_per_sec; part++) { ent = &table[nent + part]; if ((ent->ent_attr & (GPT_ENT_ATTR_BOOTME | GPT_ENT_ATTR_BOOTONCE | GPT_ENT_ATTR_BOOTFAILED)) != GPT_ENT_ATTR_BOOTONCE) { continue; } ent->ent_attr &= ~GPT_ENT_ATTR_BOOTONCE; ent->ent_attr |= GPT_ENT_ATTR_BOOTFAILED; table_updated = 1; sector_updated = 1; } if (!sector_updated) continue; bcopy(&table[nent], secbuf, DEV_BSIZE); if (drvwrite(dskp, secbuf, slba, 1)) { printf("%s: unable to update %s GPT partition table\n", BOOTPROG, which); } } if (!table_updated) return; hdr->hdr_crc_table = crc32(0, Z_NULL, 0); hdr->hdr_crc_table = crc32(hdr->hdr_crc_table, table, hdr->hdr_entries * hdr->hdr_entsz); hdr->hdr_crc_self = crc32(0, Z_NULL, 0); hdr->hdr_crc_self = crc32(hdr->hdr_crc_self, hdr, hdr->hdr_size); bzero(secbuf, DEV_BSIZE); bcopy(hdr, secbuf, hdr->hdr_size); if (drvwrite(dskp, secbuf, hdr->hdr_lba_self, 1)) printf("%s: unable to update %s GPT header\n", BOOTPROG, which); }