diff options
Diffstat (limited to 'block/partitions/msdos.c')
-rw-r--r-- | block/partitions/msdos.c | 204 |
1 files changed, 167 insertions, 37 deletions
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c index 82c44f7df911..b5d5c229cc3b 100644 --- a/block/partitions/msdos.c +++ b/block/partitions/msdos.c @@ -18,13 +18,18 @@ * Check partition table on IDE disks for common CHS translations * * Re-organised Feb 1998 Russell King + * + * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il> + * updated by Marc Espie <Marc.Espie@openbsd.org> + * + * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl> + * and Krzysztof G. Baranowski <kgb@knm.org.pl> */ #include <linux/msdos_fs.h> +#include <linux/msdos_partition.h> #include "check.h" -#include "msdos.h" #include "efi.h" -#include "aix.h" /* * Many architectures don't like unaligned accesses, while @@ -33,23 +38,21 @@ */ #include <asm/unaligned.h> -#define SYS_IND(p) get_unaligned(&p->sys_ind) - -static inline sector_t nr_sects(struct partition *p) +static inline sector_t nr_sects(struct msdos_partition *p) { return (sector_t)get_unaligned_le32(&p->nr_sects); } -static inline sector_t start_sect(struct partition *p) +static inline sector_t start_sect(struct msdos_partition *p) { return (sector_t)get_unaligned_le32(&p->start_sect); } -static inline int is_extended_partition(struct partition *p) +static inline int is_extended_partition(struct msdos_partition *p) { - return (SYS_IND(p) == DOS_EXTENDED_PARTITION || - SYS_IND(p) == WIN98_EXTENDED_PARTITION || - SYS_IND(p) == LINUX_EXTENDED_PARTITION); + return (p->sys_ind == DOS_EXTENDED_PARTITION || + p->sys_ind == WIN98_EXTENDED_PARTITION || + p->sys_ind == LINUX_EXTENDED_PARTITION); } #define MSDOS_LABEL_MAGIC1 0x55 @@ -68,7 +71,7 @@ msdos_magic_present(unsigned char *p) #define AIX_LABEL_MAGIC4 0xC1 static int aix_magic_present(struct parsed_partitions *state, unsigned char *p) { - struct partition *pt = (struct partition *) (p + 0x1be); + struct msdos_partition *pt = (struct msdos_partition *) (p + 0x1be); Sector sect; unsigned char *d; int slot, ret = 0; @@ -78,13 +81,19 @@ static int aix_magic_present(struct parsed_partitions *state, unsigned char *p) p[2] == AIX_LABEL_MAGIC3 && p[3] == AIX_LABEL_MAGIC4)) return 0; - /* Assume the partition table is valid if Linux partitions exists */ + + /* + * Assume the partition table is valid if Linux partitions exists. + * Note that old Solaris/x86 partitions use the same indicator as + * Linux swap partitions, so we consider that a Linux partition as + * well. + */ for (slot = 1; slot <= 4; slot++, pt++) { - if (pt->sys_ind == LINUX_SWAP_PARTITION || - pt->sys_ind == LINUX_RAID_PARTITION || - pt->sys_ind == LINUX_DATA_PARTITION || - pt->sys_ind == LINUX_LVM_PARTITION || - is_extended_partition(pt)) + if (pt->sys_ind == SOLARIS_X86_PARTITION || + pt->sys_ind == LINUX_RAID_PARTITION || + pt->sys_ind == LINUX_DATA_PARTITION || + pt->sys_ind == LINUX_LVM_PARTITION || + is_extended_partition(pt)) return 0; } d = read_part_sector(state, 7, §); @@ -122,15 +131,16 @@ static void parse_extended(struct parsed_partitions *state, sector_t first_sector, sector_t first_size, u32 disksig) { - struct partition *p; + struct msdos_partition *p; Sector sect; unsigned char *data; sector_t this_sector, this_size; - sector_t sector_size = bdev_logical_block_size(state->bdev) / 512; + sector_t sector_size; int loopct = 0; /* number of links followed without finding a data partition */ int i; + sector_size = queue_logical_block_size(state->disk->queue) / 512; this_sector = first_sector; this_size = first_size; @@ -146,7 +156,7 @@ static void parse_extended(struct parsed_partitions *state, if (!msdos_magic_present(data + 510)) goto done; - p = (struct partition *) (data + 0x1be); + p = (struct msdos_partition *) (data + 0x1be); /* * Usually, the first entry is the real data partition, @@ -182,7 +192,7 @@ 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) + if (p->sys_ind == LINUX_RAID_PARTITION) state->parts[state->next].flags = ADDPART_FLAG_RAID; loopct = 0; if (++state->next == state->limit) @@ -210,6 +220,30 @@ done: put_dev_sector(sect); } +#define SOLARIS_X86_NUMSLICE 16 +#define SOLARIS_X86_VTOC_SANE (0x600DDEEEUL) + +struct solaris_x86_slice { + __le16 s_tag; /* ID tag of partition */ + __le16 s_flag; /* permission flags */ + __le32 s_start; /* start sector no of partition */ + __le32 s_size; /* # of blocks in partition */ +}; + +struct solaris_x86_vtoc { + unsigned int v_bootinfo[3]; /* info needed by mboot */ + __le32 v_sanity; /* to verify vtoc sanity */ + __le32 v_version; /* layout version */ + char v_volume[8]; /* volume name */ + __le16 v_sectorsz; /* sector size in bytes */ + __le16 v_nparts; /* number of partitions */ + unsigned int v_reserved[10]; /* free space */ + struct solaris_x86_slice + v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */ + unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp */ + char v_asciilabel[128]; /* for compatibility */ +}; + /* james@bpgc.com: Solaris has a nasty indicator: 0x82 which also indicates linux swap. Be careful before believing this is Solaris. */ @@ -265,6 +299,54 @@ static void parse_solaris_x86(struct parsed_partitions *state, #endif } +/* check against BSD src/sys/sys/disklabel.h for consistency */ +#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ +#define BSD_MAXPARTITIONS 16 +#define OPENBSD_MAXPARTITIONS 16 +#define BSD_FS_UNUSED 0 /* disklabel unused partition entry ID */ +struct bsd_disklabel { + __le32 d_magic; /* the magic number */ + __s16 d_type; /* drive type */ + __s16 d_subtype; /* controller/d_type specific */ + char d_typename[16]; /* type name, e.g. "eagle" */ + char d_packname[16]; /* pack identifier */ + __u32 d_secsize; /* # of bytes per sector */ + __u32 d_nsectors; /* # of data sectors per track */ + __u32 d_ntracks; /* # of tracks per cylinder */ + __u32 d_ncylinders; /* # of data cylinders per unit */ + __u32 d_secpercyl; /* # of data sectors per cylinder */ + __u32 d_secperunit; /* # of data sectors per unit */ + __u16 d_sparespertrack; /* # of spare sectors per track */ + __u16 d_sparespercyl; /* # of spare sectors per cylinder */ + __u32 d_acylinders; /* # of alt. cylinders per unit */ + __u16 d_rpm; /* rotational speed */ + __u16 d_interleave; /* hardware sector interleave */ + __u16 d_trackskew; /* sector 0 skew, per track */ + __u16 d_cylskew; /* sector 0 skew, per cylinder */ + __u32 d_headswitch; /* head switch time, usec */ + __u32 d_trkseek; /* track-to-track seek, usec */ + __u32 d_flags; /* generic flags */ +#define NDDATA 5 + __u32 d_drivedata[NDDATA]; /* drive-type specific information */ +#define NSPARE 5 + __u32 d_spare[NSPARE]; /* reserved for future use */ + __le32 d_magic2; /* the magic number (again) */ + __le16 d_checksum; /* xor of data incl. partitions */ + + /* filesystem and partition information: */ + __le16 d_npartitions; /* number of partitions in following */ + __le32 d_bbsize; /* size of boot area at sn0, bytes */ + __le32 d_sbsize; /* max size of fs superblock, bytes */ + struct bsd_partition { /* the partition table */ + __le32 p_size; /* number of sectors in partition */ + __le32 p_offset; /* starting sector */ + __le32 p_fsize; /* filesystem basic fragment size */ + __u8 p_fstype; /* filesystem type, see below */ + __u8 p_frag; /* filesystem fragments per block */ + __le16 p_cpg; /* filesystem cylinders per group */ + } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */ +}; + #if defined(CONFIG_BSD_DISKLABEL) /* * Create devices for BSD partitions listed in a disklabel, under a @@ -349,6 +431,51 @@ static void parse_openbsd(struct parsed_partitions *state, #endif } +#define UNIXWARE_DISKMAGIC (0xCA5E600DUL) /* The disk magic number */ +#define UNIXWARE_DISKMAGIC2 (0x600DDEEEUL) /* The slice table magic nr */ +#define UNIXWARE_NUMSLICE 16 +#define UNIXWARE_FS_UNUSED 0 /* Unused slice entry ID */ + +struct unixware_slice { + __le16 s_label; /* label */ + __le16 s_flags; /* permission flags */ + __le32 start_sect; /* starting sector */ + __le32 nr_sects; /* number of sectors in slice */ +}; + +struct unixware_disklabel { + __le32 d_type; /* drive type */ + __le32 d_magic; /* the magic number */ + __le32 d_version; /* version number */ + char d_serial[12]; /* serial number of the device */ + __le32 d_ncylinders; /* # of data cylinders per device */ + __le32 d_ntracks; /* # of tracks per cylinder */ + __le32 d_nsectors; /* # of data sectors per track */ + __le32 d_secsize; /* # of bytes per sector */ + __le32 d_part_start; /* # of first sector of this partition*/ + __le32 d_unknown1[12]; /* ? */ + __le32 d_alt_tbl; /* byte offset of alternate table */ + __le32 d_alt_len; /* byte length of alternate table */ + __le32 d_phys_cyl; /* # of physical cylinders per device */ + __le32 d_phys_trk; /* # of physical tracks per cylinder */ + __le32 d_phys_sec; /* # of physical sectors per track */ + __le32 d_phys_bytes; /* # of physical bytes per sector */ + __le32 d_unknown2; /* ? */ + __le32 d_unknown3; /* ? */ + __le32 d_pad[8]; /* pad */ + + struct unixware_vtoc { + __le32 v_magic; /* the magic number */ + __le32 v_version; /* version number */ + char v_name[8]; /* volume name */ + __le16 v_nslices; /* # of slices */ + __le16 v_unknown1; /* ? */ + __le32 v_reserved[10]; /* reserved */ + struct unixware_slice + v_slice[UNIXWARE_NUMSLICE]; /* slice headers */ + } vtoc; +}; /* 408 */ + /* * Create devices for Unixware partitions listed in a disklabel, under a * dos-like partition. See parse_extended() for more information. @@ -392,6 +519,8 @@ static void parse_unixware(struct parsed_partitions *state, #endif } +#define MINIX_NR_SUBPARTITIONS 4 + /* * Minix 2.0.0/2.0.2 subpartition support. * Anand Krishnamurthy <anandk@wiproge.med.ge.com> @@ -403,20 +532,20 @@ static void parse_minix(struct parsed_partitions *state, #ifdef CONFIG_MINIX_SUBPARTITION Sector sect; unsigned char *data; - struct partition *p; + struct msdos_partition *p; int i; data = read_part_sector(state, offset, §); if (!data) return; - p = (struct partition *)(data + 0x1be); + p = (struct msdos_partition *)(data + 0x1be); /* The first sector of a Minix partition can have either * a secondary MBR describing its subpartitions, or * the normal boot sector. */ if (msdos_magic_present(data + 510) && - SYS_IND(p) == MINIX_PARTITION) { /* subpartition table present */ + p->sys_ind == MINIX_PARTITION) { /* subpartition table present */ char tmp[1 + BDEVNAME_SIZE + 10 + 9 + 1]; snprintf(tmp, sizeof(tmp), " %s%d: <minix:", state->name, origin); @@ -425,7 +554,7 @@ static void parse_minix(struct parsed_partitions *state, if (state->next == state->limit) break; /* add each partition in use */ - if (SYS_IND(p) == MINIX_PARTITION) + if (p->sys_ind == MINIX_PARTITION) put_partition(state, state->next++, start_sect(p), nr_sects(p)); } @@ -451,14 +580,15 @@ static struct { int msdos_partition(struct parsed_partitions *state) { - sector_t sector_size = bdev_logical_block_size(state->bdev) / 512; + sector_t sector_size; Sector sect; unsigned char *data; - struct partition *p; + struct msdos_partition *p; struct fat_boot_sector *fb; int slot; u32 disksig; + sector_size = queue_logical_block_size(state->disk->queue) / 512; data = read_part_sector(state, 0, §); if (!data) return -1; @@ -488,11 +618,11 @@ int msdos_partition(struct parsed_partitions *state) * partition table. Reject this in case the boot indicator * is not 0 or 0x80. */ - p = (struct partition *) (data + 0x1be); + p = (struct msdos_partition *) (data + 0x1be); for (slot = 1; slot <= 4; slot++, p++) { if (p->boot_ind != 0 && p->boot_ind != 0x80) { /* - * Even without a valid boot inidicator value + * Even without a valid boot indicator value * its still possible this is valid FAT filesystem * without a partition table. */ @@ -510,16 +640,16 @@ int msdos_partition(struct parsed_partitions *state) } #ifdef CONFIG_EFI_PARTITION - p = (struct partition *) (data + 0x1be); + p = (struct msdos_partition *) (data + 0x1be); for (slot = 1 ; slot <= 4 ; slot++, p++) { /* If this is an EFI GPT disk, msdos should ignore it. */ - if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) { + if (p->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT) { put_dev_sector(sect); return 0; } } #endif - p = (struct partition *) (data + 0x1be); + p = (struct msdos_partition *) (data + 0x1be); disksig = le32_to_cpup((__le32 *)(data + 0x1b8)); @@ -555,20 +685,20 @@ int msdos_partition(struct parsed_partitions *state) } put_partition(state, slot, start, size); set_info(state, slot, disksig); - if (SYS_IND(p) == LINUX_RAID_PARTITION) + if (p->sys_ind == LINUX_RAID_PARTITION) state->parts[slot].flags = ADDPART_FLAG_RAID; - if (SYS_IND(p) == DM6_PARTITION) + if (p->sys_ind == DM6_PARTITION) strlcat(state->pp_buf, "[DM]", PAGE_SIZE); - if (SYS_IND(p) == EZD_PARTITION) + if (p->sys_ind == EZD_PARTITION) strlcat(state->pp_buf, "[EZD]", PAGE_SIZE); } strlcat(state->pp_buf, "\n", PAGE_SIZE); /* second pass - output for each on a separate line */ - p = (struct partition *) (0x1be + data); + p = (struct msdos_partition *) (0x1be + data); for (slot = 1 ; slot <= 4 ; slot++, p++) { - unsigned char id = SYS_IND(p); + unsigned char id = p->sys_ind; int n; if (!nr_sects(p)) |