diff options
Diffstat (limited to 'block/partitions/msdos.c')
| -rw-r--r-- | block/partitions/msdos.c | 49 |
1 files changed, 38 insertions, 11 deletions
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c index 5f79a6677c6..9123f250b42 100644 --- a/block/partitions/msdos.c +++ b/block/partitions/msdos.c @@ -23,6 +23,7 @@ #include "check.h" #include "msdos.h" #include "efi.h" +#include "aix.h" /* * Many architectures don't like unaligned accesses, while @@ -90,10 +91,21 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p) if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M') ret = 1; put_dev_sector(sect); - }; + } return ret; } +static void set_info(struct parsed_partitions *state, int slot, + u32 disksig) +{ + struct partition_meta_info *info = &state->parts[slot].info; + + snprintf(info->uuid, sizeof(info->uuid), "%08x-%02x", disksig, + slot); + info->volname[0] = 0; + state->parts[slot].has_info = true; +} + /* * Create devices for each logical partition in an extended partition. * The logical partitions form a linked list, with each entry being @@ -106,7 +118,8 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p) */ static void parse_extended(struct parsed_partitions *state, - sector_t first_sector, sector_t first_size) + sector_t first_sector, sector_t first_size, + u32 disksig) { struct partition *p; Sector sect; @@ -130,7 +143,7 @@ static void parse_extended(struct parsed_partitions *state, return; if (!msdos_magic_present(data + 510)) - goto done; + goto done; p = (struct partition *) (data + 0x1be); @@ -143,7 +156,7 @@ static void parse_extended(struct parsed_partitions *state, * and OS/2 seems to use all four entries. */ - /* + /* * First process the data partition(s) */ for (i=0; i<4; i++, p++) { @@ -166,6 +179,7 @@ static void parse_extended(struct parsed_partitions *state, } put_partition(state, state->next, next, size); + set_info(state, state->next, disksig); if (SYS_IND(p) == LINUX_RAID_PARTITION) state->parts[state->next].flags = ADDPART_FLAG_RAID; loopct = 0; @@ -250,7 +264,7 @@ static void parse_solaris_x86(struct parsed_partitions *state, } #if defined(CONFIG_BSD_DISKLABEL) -/* +/* * Create devices for BSD partitions listed in a disklabel, under a * dos-like partition. See parse_extended() for more information. */ @@ -281,7 +295,7 @@ static void parse_bsd(struct parsed_partitions *state, if (state->next == state->limit) break; - if (p->p_fstype == BSD_FS_UNUSED) + if (p->p_fstype == BSD_FS_UNUSED) continue; bsd_start = le32_to_cpu(p->p_offset); bsd_size = le32_to_cpu(p->p_size); @@ -428,7 +442,7 @@ static struct { {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86}, {0, NULL}, }; - + int msdos_partition(struct parsed_partitions *state) { sector_t sector_size = bdev_logical_block_size(state->bdev) / 512; @@ -437,18 +451,28 @@ int msdos_partition(struct parsed_partitions *state) struct partition *p; struct fat_boot_sector *fb; int slot; + u32 disksig; data = read_part_sector(state, 0, §); if (!data) return -1; - if (!msdos_magic_present(data + 510)) { + + /* + * Note order! (some AIX disks, e.g. unbootable kind, + * have no MSDOS 55aa) + */ + if (aix_magic_present(state, data)) { put_dev_sector(sect); +#ifdef CONFIG_AIX_PARTITION + return aix_partition(state); +#else + strlcat(state->pp_buf, " [AIX]", PAGE_SIZE); return 0; +#endif } - if (aix_magic_present(state, data)) { + if (!msdos_magic_present(data + 510)) { put_dev_sector(sect); - strlcat(state->pp_buf, " [AIX]", PAGE_SIZE); return 0; } @@ -491,6 +515,8 @@ int msdos_partition(struct parsed_partitions *state) #endif p = (struct partition *) (data + 0x1be); + disksig = le32_to_cpup((__le32 *)(data + 0x1b8)); + /* * Look for partitions in two passes: * First find the primary and DOS-type extended partitions. @@ -515,11 +541,12 @@ int msdos_partition(struct parsed_partitions *state) put_partition(state, slot, start, n); strlcat(state->pp_buf, " <", PAGE_SIZE); - parse_extended(state, start, size); + parse_extended(state, start, size, disksig); strlcat(state->pp_buf, " >", PAGE_SIZE); continue; } put_partition(state, slot, start, size); + set_info(state, slot, disksig); if (SYS_IND(p) == LINUX_RAID_PARTITION) state->parts[slot].flags = ADDPART_FLAG_RAID; if (SYS_IND(p) == DM6_PARTITION) |