static void parse_unixware(struct parsed_partitions *state,
sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_UNIXWARE_DISKLABEL
Sector sect;
struct unixware_disklabel *l;
struct unixware_slice *p;
l = read_part_sector(state, offset + 29, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) {
put_dev_sector(sect);
return;
}
printk(" %s%d: <unixware:", state->name, origin);
p = &l->vtoc.v_slice[1];
/* I omit the 0th slice as it is the same as whole disk. */
while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) {
if (state->next == state->limit)
break;
if (p->s_label != UNIXWARE_FS_UNUSED)
put_partition(state, state->next++,
le32_to_cpu(p->start_sect),
le32_to_cpu(p->nr_sects));
p++;
}
put_dev_sector(sect);
printk(" >\n");
#endif
}
/*
* Create devices for BSD partitions listed in a disklabel, under a
* dos-like partition. See extended_partition() for more information.
*/
static void do_bsd_partition(struct gendisk *hd, struct block_device *bdev,
int minor, int *current_minor, char *name, int max_partitions)
{
long offset = hd->part[minor].start_sect;
Sector sect;
struct bsd_disklabel *l;
struct bsd_partition *p;
int mask = (1 << hd->minor_shift) - 1;
char buf[40];
l = (struct bsd_disklabel *)read_dev_sector(bdev, offset+1, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
put_dev_sector(sect);
return;
}
printk(" %s: <%s", partition_name(hd, minor, buf), name);
if (le16_to_cpu(l->d_npartitions) < max_partitions)
max_partitions = le16_to_cpu(l->d_npartitions);
for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
if ((*current_minor & mask) == 0)
break;
if (p->p_fstype == BSD_FS_UNUSED)
continue;
check_and_add_bsd_partition(hd, p, minor, current_minor);
}
put_dev_sector(sect);
printk(" >\n");
}
static int emmc_read(struct mmc_emergency_info *emmc, void *holder,
char *buffer, off_t offset, int count, bool to_user)
{
unsigned char *read_ptr;
unsigned int sector_no;
off_t sector_offset;
Sector sect;
int rc;
if (!emmc) {
pr_err("%s:invalid emmc infomation\n", __func__);
return 0;
}
if (!emmc->bdev) {
pr_err("%s:invalid emmc block device\n", __func__);
return 0;
}
sector_no = offset >> SECTOR_SIZE_SHIFT;
sector_offset = offset & (SECTOR_SIZE - 1);
if (sector_no >= emmc->block_count) {
pr_err("%s: reading an invalid address\n", __func__);
return -EINVAL;
}
/* make sure the block device is open rw */
rc = blkdev_get(emmc->bdev, FMODE_READ | FMODE_WRITE, holder);
if (rc < 0) {
pr_err("%s: blk_dev_get failed!\n", __func__);
return 0;
}
read_ptr = read_dev_sector(emmc->bdev, sector_no + emmc->start_block,
§);
if (!read_ptr) {
put_dev_sector(sect);
return -EINVAL;
}
/* count and read_ptr are updated to match flash page size */
if (count + sector_offset > SECTOR_SIZE)
count = SECTOR_SIZE - sector_offset;
if (sector_offset)
read_ptr += sector_offset;
if (to_user) {
if (copy_to_user(buffer, read_ptr, count)) {
pr_err( "%s: Failed to copy buffer to User\n",
__func__);
return 0;
}
}
else
memcpy(buffer, read_ptr, count);
put_dev_sector(sect);
return count;
}
int tegra_msdos_parse(struct parsed_partitions *state, struct block_device *bdev, u64 mbr_offset)
{
int sector_size = bdev_logical_block_size(bdev) / 512;
Sector sect;
unsigned char *data;
struct partition *p;
int slot;
printk(KERN_INFO "tegra_msdos_parse: mbr_offset=%llu\n", mbr_offset);
data = read_dev_sector(bdev, mbr_offset, §);
if (!data) {
printk(KERN_INFO "tegra_msdos_parse: read error. exit\n");
return -1;
}
if (!msdos_magic_present(data + 510)) {
printk(KERN_INFO "tegra_msdos_parse: no msdos magic\n");
put_dev_sector(sect);
return 0;
}
p = (struct partition *) (data + 0x1be);
for (slot = 1; slot <= 4; slot++, p++) {
if (p->boot_ind != 0 && p->boot_ind != 0x80) { // 0x1be,0x1ce,0x1de,0x1fe
printk("tegra_msdos_parse: slot %d, boot_ind=0x%x. exit\n", slot, p->boot_ind);
put_dev_sector(sect);
return 0;
}
}
p = (struct partition *) (data + 0x1be);
for (slot = 1 ; slot <= 4 ; slot++, p++) {
u64 start = START_SECT(p)*sector_size; // 0015f800 1439744
u64 size = NR_SECTS(p)*sector_size; // 01c41400 29627392
printk(KERN_INFO "tegra_msdos_parse: slot %d, start=%llu size=%llu\n", slot, start, size);
if (!size)
continue;
if (is_extended_partition(p)) {
printk(KERN_INFO "tegra_msdos_parse: slot %d extended partition\n", slot);
//put_partition(state, state->next++, start+mbr_offset, size == 1 ? 1 : 2);
printk(" <");
tegra_msdos_parse_extended(state, state->bdev, mbr_offset, start, size);
printk(" >");
continue;
}
printk(KERN_INFO "tegra_msdos_parse: put_partition\n");
put_partition(state, state->next++, start+mbr_offset, size);
}
printk("\n");
printk(KERN_INFO "tegra_msdos_parse: done\n");
put_dev_sector(sect);
return 1;
}
int sgi_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int i, csum;
__be32 magic;
int slot = 1;
unsigned int start, blocks;
__be32 *ui, cs;
Sector sect;
struct sgi_disklabel *label;
struct sgi_partition *p;
char b[BDEVNAME_SIZE];
label = (struct sgi_disklabel *) read_dev_sector(bdev, 0, §);
if (!label)
return -1;
p = &label->partitions[0];
magic = label->magic_mushroom;
if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) {
/*printk("Dev %s SGI disklabel: bad magic %08x\n",
bdevname(bdev, b), be32_to_cpu(magic));*/
put_dev_sector(sect);
return 0;
}
ui = ((__be32 *) (label + 1)) - 1;
for(csum = 0; ui >= ((__be32 *) label);) {
cs = *ui--;
csum += be32_to_cpu(cs);
}
if(csum) {
printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n",
bdevname(bdev, b));
put_dev_sector(sect);
return 0;
}
/* All SGI disk labels have 16 partitions, disks under Linux only
* have 15 minor's. Luckily there are always a few zero length
* partitions which we don't care about so we never overflow the
* current_minor.
*/
for(i = 0; i < 16; i++, p++) {
blocks = be32_to_cpu(p->num_blocks);
start = be32_to_cpu(p->first_block);
if (blocks) {
put_partition(state, slot, start, blocks);
if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
state->parts[slot].flags = ADDPART_FLAG_RAID;
}
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}
int sgi_partition(struct parsed_partitions *state)
{
int i, csum;
__be32 magic;
int slot = 1;
unsigned int start, blocks;
__be32 *ui, cs;
Sector sect;
struct sgi_disklabel *label;
struct sgi_partition *p;
char b[BDEVNAME_SIZE];
label = read_part_sector(state, 0, §);
if (!label)
return -1;
p = &label->partitions[0];
magic = label->magic_mushroom;
if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) {
/*
*/
put_dev_sector(sect);
return 0;
}
ui = ((__be32 *) (label + 1)) - 1;
for(csum = 0; ui >= ((__be32 *) label);) {
cs = *ui--;
csum += be32_to_cpu(cs);
}
if(csum) {
printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n",
bdevname(state->bdev, b));
put_dev_sector(sect);
return 0;
}
/*
*/
for(i = 0; i < 16; i++, p++) {
blocks = be32_to_cpu(p->num_blocks);
start = be32_to_cpu(p->first_block);
if (blocks) {
put_partition(state, slot, start, blocks);
if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
state->parts[slot].flags = ADDPART_FLAG_RAID;
}
slot++;
}
strlcat(state->pp_buf, "\n", PAGE_SIZE);
put_dev_sector(sect);
return 1;
}
static void parse_solaris_x86(struct parsed_partitions *state,
sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_SOLARIS_X86_PARTITION
Sector sect;
struct solaris_x86_vtoc *v;
int i;
short max_nparts;
v = read_part_sector(state, offset + 1, §);
if (!v)
return;
if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
put_dev_sector(sect);
return;
}
{
char tmp[1 + BDEVNAME_SIZE + 10 + 11 + 1];
snprintf(tmp, sizeof(tmp), " %s%d: <solaris:", state->name, origin);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
}
if (le32_to_cpu(v->v_version) != 1) {
char tmp[64];
snprintf(tmp, sizeof(tmp), " cannot handle version %d vtoc>\n",
le32_to_cpu(v->v_version));
strlcat(state->pp_buf, tmp, PAGE_SIZE);
put_dev_sector(sect);
return;
}
/* Ensure we can handle previous case of VTOC with 8 entries gracefully */
max_nparts = le16_to_cpu(v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
for (i = 0; i < max_nparts && state->next < state->limit; i++) {
struct solaris_x86_slice *s = &v->v_slice[i];
char tmp[3 + 10 + 1 + 1];
if (s->s_size == 0)
continue;
snprintf(tmp, sizeof(tmp), " [s%d]", i);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
/* solaris partitions are relative to current MS-DOS
* one; must add the offset of the current partition */
put_partition(state, state->next++,
le32_to_cpu(s->s_start)+offset,
le32_to_cpu(s->s_size));
}
put_dev_sector(sect);
strlcat(state->pp_buf, " >\n", PAGE_SIZE);
#endif
}
static void
solaris_x86_partition(struct gendisk *hd, struct block_device *bdev,
int minor, int *current_minor)
{
#ifdef CONFIG_SOLARIS_X86_PARTITION
long offset = hd->part[minor].start_sect;
Sector sect;
struct solaris_x86_vtoc *v;
struct solaris_x86_slice *s;
int mask = (1 << hd->minor_shift) - 1;
int i;
char buf[40];
v = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, §);
if (!v)
return;
if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
put_dev_sector(sect);
return;
}
printk(" %s: <solaris:", partition_name(hd, minor, buf));
if (le32_to_cpu(v->v_version) != 1) {
printk(" cannot handle version %d vtoc>\n",
le32_to_cpu(v->v_version));
put_dev_sector(sect);
return;
}
for (i=0; i<SOLARIS_X86_NUMSLICE; i++) {
if ((*current_minor & mask) == 0)
break;
s = &v->v_slice[i];
if (s->s_size == 0)
continue;
printk(" [s%d]", i);
/* solaris partitions are relative to current MS-DOS
* one but add_gd_partition starts relative to sector
* zero of the disk. Therefore, must add the offset
* of the current partition */
add_gd_partition(hd, *current_minor,
le32_to_cpu(s->s_start)+offset,
le32_to_cpu(s->s_size));
(*current_minor)++;
}
put_dev_sector(sect);
printk(" >\n");
#endif
}
/*
* Create devices for BSD partitions listed in a disklabel, under a
* dos-like partition. See parse_extended() for more information.
*/
static void parse_bsd(struct parsed_partitions *state,
sector_t offset, sector_t size, int origin, char *flavour,
int max_partitions)
{
Sector sect;
struct bsd_disklabel *l;
struct bsd_partition *p;
char tmp[64];
l = read_part_sector(state, offset + 1, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
put_dev_sector(sect);
return;
}
snprintf(tmp, sizeof(tmp), " %s%d: <%s:", state->name, origin, flavour);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
if (le16_to_cpu(l->d_npartitions) < max_partitions)
max_partitions = le16_to_cpu(l->d_npartitions);
for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
sector_t bsd_start, bsd_size;
if (state->next == state->limit)
break;
if (p->p_fstype == BSD_FS_UNUSED)
continue;
bsd_start = le32_to_cpu(p->p_offset);
bsd_size = le32_to_cpu(p->p_size);
if (offset == bsd_start && size == bsd_size)
/* full parent partition, we have it already */
continue;
if (offset > bsd_start || offset+size < bsd_start+bsd_size) {
strlcat(state->pp_buf, "bad subpartition - ignored\n", PAGE_SIZE);
continue;
}
put_partition(state, state->next++, bsd_start, bsd_size);
}
put_dev_sector(sect);
if (le16_to_cpu(l->d_npartitions) > max_partitions) {
snprintf(tmp, sizeof(tmp), " (ignored %d more)",
le16_to_cpu(l->d_npartitions) - max_partitions);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
}
strlcat(state->pp_buf, " >\n", PAGE_SIZE);
}
static int aix_magic_present(struct parsed_partitions *state, unsigned char *p)
{
struct partition *pt = (struct partition *) (p + 0x1be);
Sector sect;
unsigned char *d;
int slot, ret = 0;
if (!(p[0] == AIX_LABEL_MAGIC1 &&
p[1] == AIX_LABEL_MAGIC2 &&
p[2] == AIX_LABEL_MAGIC3 &&
p[3] == AIX_LABEL_MAGIC4))
return 0;
/* Assume the partition table is valid if Linux partitions exists */
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))
return 0;
}
d = read_part_sector(state, 7, §);
if (d) {
if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
ret = 1;
put_dev_sector(sect);
};
return ret;
}
/**
* read_lba(): Read bytes from disk, starting at given LBA
* @state
* @lba
* @buffer
* @size_t
*
* Description: Reads @count bytes from @state->bdev into @buffer.
* Returns number of bytes read on success, 0 on error.
*/
static size_t read_lba(struct parsed_partitions *state,
u64 lba, u8 *buffer, size_t count)
{
size_t totalreadcount = 0;
struct block_device *bdev = state->bdev;
sector_t n = lba * (bdev_logical_block_size(bdev) / 512);
if (!buffer || lba > last_lba(bdev))
return 0;
while (count) {
int copied = 512;
Sector sect;
unsigned char *data = read_part_sector(state, n++, §);
if (!data)
break;
if (copied > count)
copied = count;
memcpy(buffer, data, copied);
put_dev_sector(sect);
buffer += copied;
totalreadcount +=copied;
count -= copied;
}
return totalreadcount;
}
static void parse_minix(struct parsed_partitions *state,
sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_MINIX_SUBPARTITION
Sector sect;
unsigned char *data;
struct partition *p;
int i;
data = read_part_sector(state, offset, §);
if (!data)
return;
p = (struct 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 */
printk(" %s%d: <minix:", state->name, origin);
for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
if (state->next == state->limit)
break;
/* add each partition in use */
if (SYS_IND(p) == MINIX_PARTITION)
put_partition(state, state->next++,
start_sect(p), nr_sects(p));
}
printk(" >\n");
}
put_dev_sector(sect);
#endif /* CONFIG_MINIX_SUBPARTITION */
}
int sysv68_partition(struct parsed_partitions *state)
{
int i, slices;
int slot = 1;
Sector sect;
unsigned char *data;
struct dkblk0 *b;
struct slice *slice;
char tmp[64];
data = read_part_sector(state, 0, §);
if (!data)
return -1;
b = (struct dkblk0 *)data;
if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
put_dev_sector(sect);
return 0;
}
slices = be16_to_cpu(b->dk_ios.ios_slccnt);
i = be32_to_cpu(b->dk_ios.ios_slcblk);
put_dev_sector(sect);
data = read_part_sector(state, i, §);
if (!data)
return -1;
slices -= 1; /* last slice is the whole disk */
snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
slice = (struct slice *)data;
for (i = 0; i < slices; i++, slice++) {
if (slot == state->limit)
break;
if (be32_to_cpu(slice->nblocks)) {
put_partition(state, slot,
be32_to_cpu(slice->blkoff),
be32_to_cpu(slice->nblocks));
snprintf(tmp, sizeof(tmp), "(s%u)", i);
strlcat(state->pp_buf, tmp, PAGE_SIZE);
}
slot++;
}
strlcat(state->pp_buf, "\n", PAGE_SIZE);
put_dev_sector(sect);
return 1;
}
int karma_partition(struct parsed_partitions *state)
{
int i;
int slot = 1;
Sector sect;
unsigned char *data;
struct disklabel {
u8 d_reserved[270];
struct d_partition {
__le32 p_res;
u8 p_fstype;
u8 p_res2[3];
__le32 p_offset;
__le32 p_size;
} d_partitions[2];
u8 d_blank[208];
__le16 d_magic;
} __attribute__((packed)) *label;
struct d_partition *p;
data = read_part_sector(state, 0, §);
if (!data)
return -1;
label = (struct disklabel *)data;
if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
put_dev_sector(sect);
return 0;
}
p = label->d_partitions;
for (i = 0 ; i < 2; i++, p++) {
if (slot == state->limit)
break;
if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
put_partition(state, slot, le32_to_cpu(p->p_offset),
le32_to_cpu(p->p_size));
}
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}
int release_cmdline(struct inode *i, struct file *f)
{
struct cmdline_priv *p =
(struct cmdline_priv *)f->private_data;
put_dev_sector(p->sect);
blkdev_put(p->bdev, f->f_mode);
kfree(p);
return 0;
}
/*
* Create devices for BSD partitions listed in a disklabel, under a
* dos-like partition. See parse_extended() for more information.
*/
static void
parse_bsd(struct parsed_partitions *state, struct block_device *bdev,
u32 offset, u32 size, int origin, char *flavour,
int max_partitions)
{
Sector sect;
struct bsd_disklabel *l;
struct bsd_partition *p;
l = (struct bsd_disklabel *)read_dev_sector(bdev, offset+1, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != BSD_DISKMAGIC) {
put_dev_sector(sect);
return;
}
printk(" %s%d: <%s:", state->name, origin, flavour);
if (le16_to_cpu(l->d_npartitions) < max_partitions)
max_partitions = le16_to_cpu(l->d_npartitions);
for (p = l->d_partitions; p - l->d_partitions < max_partitions; p++) {
u32 bsd_start, bsd_size;
if (state->next == state->limit)
break;
if (p->p_fstype == BSD_FS_UNUSED)
continue;
bsd_start = le32_to_cpu(p->p_offset);
bsd_size = le32_to_cpu(p->p_size);
if (offset == bsd_start && size == bsd_size)
/* full parent partition, we have it already */
continue;
if (offset > bsd_start || offset+size < bsd_start+bsd_size) {
printk("bad subpartition - ignored\n");
continue;
}
put_partition(state, state->next++, bsd_start, bsd_size);
}
put_dev_sector(sect);
if (le16_to_cpu(l->d_npartitions) > max_partitions)
printk(" (ignored %d more)",
le16_to_cpu(l->d_npartitions) - max_partitions);
printk(" >\n");
}
static void
parse_solaris_x86(struct parsed_partitions *state, struct block_device *bdev,
u32 offset, u32 size, int origin)
{
#ifdef CONFIG_SOLARIS_X86_PARTITION
Sector sect;
struct solaris_x86_vtoc *v;
int i;
short max_nparts;
v = (struct solaris_x86_vtoc *)read_dev_sector(bdev, offset+1, §);
if (!v)
return;
if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
put_dev_sector(sect);
return;
}
printk(" %s%d: <solaris:", state->name, origin);
if (le32_to_cpu(v->v_version) != 1) {
printk(" cannot handle version %d vtoc>\n",
le32_to_cpu(v->v_version));
put_dev_sector(sect);
return;
}
/* Ensure we can handle previous case of VTOC with 8 entries gracefully */
max_nparts = le16_to_cpu (v->v_nparts) > 8 ? SOLARIS_X86_NUMSLICE : 8;
for (i=0; i<max_nparts && state->next<state->limit; i++) {
struct solaris_x86_slice *s = &v->v_slice[i];
if (s->s_size == 0)
continue;
printk(" [s%d]", i);
/* solaris partitions are relative to current MS-DOS
* one; must add the offset of the current partition */
put_partition(state, state->next++,
le32_to_cpu(s->s_start)+offset,
le32_to_cpu(s->s_size));
}
put_dev_sector(sect);
printk(" >\n");
#endif
}
static void emmc_panic_erase(unsigned char *buffer, Sector *sect)
{
struct emmc_ipanic_data *ctx = &drv_ctx;
struct mmc_emergency_info *emmc = ctx->emmc;
unsigned char *read_buf_ptr = buffer;
Sector new_sect;
int rc;
if (!emmc) {
pr_err("%s:invalid emmc infomation\n", __func__);
return;
}
if (!read_buf_ptr || !sect) {
sect = &new_sect;
if (!emmc->bdev) {
pr_err("%s:invalid emmc block device\n",
__func__);
goto out;
}
/* make sure the block device is open rw */
rc = blkdev_get(emmc->bdev, FMODE_READ | FMODE_WRITE, emmc_panic_erase);
if (rc < 0) {
pr_err("%s: blk_dev_get failed!\n", __func__);
goto out;
}
/*read panic header */
read_buf_ptr =
read_dev_sector(emmc->bdev, emmc->start_block, sect);
if (!read_buf_ptr) {
pr_err("%s: read sector error(%llu)!\n",
__func__, (u64) emmc->start_block);
goto out;
}
}
/*write all zero to panic header */
lock_page(sect->v);
memset(read_buf_ptr, 0, SECTOR_SIZE);
set_page_dirty(sect->v);
unlock_page(sect->v);
sync_blockdev(emmc->bdev);
if (!read_buf_ptr)
put_dev_sector(*sect);
out:
memset(&ctx->hdr, 0, SECTOR_SIZE);
return;
}
int ultrix_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int i;
Sector sect;
unsigned char *data;
struct ultrix_disklabel {
s32 pt_magic; /* magic no. indicating part. info exits */
s32 pt_valid; /* set by driver if pt is current */
struct pt_info {
s32 pi_nblocks; /* no. of sectors */
u32 pi_blkoff; /* block offset for start */
} pt_part[8];
} *label;
#define PT_MAGIC 0x032957 /* Partition magic number */
#define PT_VALID 1 /* Indicates if struct is valid */
data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §);
if (!data)
return -1;
label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
for (i=0; i<8; i++)
if (label->pt_part[i].pi_nblocks)
put_partition(state, i+1,
label->pt_part[i].pi_blkoff,
label->pt_part[i].pi_nblocks);
put_dev_sector(sect);
printk ("\n");
return 1;
} else {
put_dev_sector(sect);
return 0;
}
}
/*
* Create devices for Unixware partitions listed in a disklabel, under a
* dos-like partition. See extended_partition() for more information.
*/
static void unixware_partition(struct gendisk *hd, struct block_device *bdev,
int minor, int *current_minor)
{
#ifdef CONFIG_UNIXWARE_DISKLABEL
long offset = hd->part[minor].start_sect;
Sector sect;
struct unixware_disklabel *l;
struct unixware_slice *p;
int mask = (1 << hd->minor_shift) - 1;
char buf[40];
l = (struct unixware_disklabel *)read_dev_sector(bdev, offset+29, §);
if (!l)
return;
if (le32_to_cpu(l->d_magic) != UNIXWARE_DISKMAGIC ||
le32_to_cpu(l->vtoc.v_magic) != UNIXWARE_DISKMAGIC2) {
put_dev_sector(sect);
return;
}
printk(" %s: <unixware:", partition_name(hd, minor, buf));
p = &l->vtoc.v_slice[1];
/* I omit the 0th slice as it is the same as whole disk. */
while (p - &l->vtoc.v_slice[0] < UNIXWARE_NUMSLICE) {
if ((*current_minor & mask) == 0)
break;
if (p->s_label != UNIXWARE_FS_UNUSED) {
add_gd_partition(hd, *current_minor, START_SECT(p),
NR_SECTS(p));
(*current_minor)++;
}
p++;
}
put_dev_sector(sect);
printk(" >\n");
#endif
}
/**
* ldm_validate_vmdb - Read the VMDB and validate it
* @state: Partition check state including device holding the LDM Database
* @base: Offset, into @bdev, of the database
* @ldb: Cache of the database structures
*
* Find the vmdb of the LDM Database stored on @bdev and return the parsed
* information in @ldb.
*
* Return: 'true' @ldb contains validated VBDB info
* 'false' @ldb contents are undefined
*/
static bool ldm_validate_vmdb(struct parsed_partitions *state,
unsigned long base, struct ldmdb *ldb)
{
Sector sect;
u8 *data;
bool result = false;
struct vmdb *vm;
struct tocblock *toc;
BUG_ON (!state || !ldb);
vm = &ldb->vm;
toc = &ldb->toc;
data = read_part_sector(state, base + OFF_VMDB, §);
if (!data) {
ldm_crit ("Disk read failed.");
return false;
}
if (!ldm_parse_vmdb (data, vm))
goto out; /* Already logged */
/* Are there uncommitted transactions? */
if (get_unaligned_be16(data + 0x10) != 0x01) {
ldm_crit ("Database is not in a consistent state. Aborting.");
goto out;
}
if (vm->vblk_offset != 512)
ldm_info ("VBLKs start at offset 0x%04x.", vm->vblk_offset);
/*
* The last_vblkd_seq can be before the end of the vmdb, just make sure
* it is not out of bounds.
*/
if ((vm->vblk_size * vm->last_vblk_seq) > (toc->bitmap1_size << 9)) {
ldm_crit ("VMDB exceeds allowed size specified by TOCBLOCK. "
"Database is corrupt. Aborting.");
goto out;
}
result = true;
out:
put_dev_sector (sect);
return result;
}
/*
* Uses kernel's function to read sector's data to read the requested block
*/
void read_block(char *dest, size_t size, sector_t block)
{
// Sector size is 512, so we calculate the block's sector index
sector_t sector = block * (dedup_get_block_size() / 512);
Sector sect;
// Read data
void *tmp = read_dev_sector(dedup_bdev, sector, §);
if (!tmp) {
printk(KERN_ERR "failed to read sector.\n");
return;
}
// Copy and release sector
memcpy(dest, (char *)tmp, size);
put_dev_sector(sect);
}
static void parse_solaris_x86(struct parsed_partitions *state,
sector_t offset, sector_t size, int origin)
{
#ifdef CONFIG_SOLARIS_X86_PARTITION
Sector sect;
struct solaris_x86_vtoc *v;
int i;
short max_nparts;
v = read_part_sector(state, offset + 1, §);
if (!v)
return;
if (le32_to_cpu(v->v_sanity) != SOLARIS_X86_VTOC_SANE) {
put_dev_sector(sect);
return;
}
<<<<<<< HEAD
/*
* Minix 2.0.0/2.0.2 subpartition support.
* Anand Krishnamurthy <*****@*****.**>
* Rajeev V. Pillai <*****@*****.**>
*/
static void minix_partition(struct gendisk *hd, struct block_device *bdev,
int minor, int *current_minor)
{
#ifdef CONFIG_MINIX_SUBPARTITION
long offset = hd->part[minor].start_sect;
Sector sect;
unsigned char *data;
struct partition *p;
int mask = (1 << hd->minor_shift) - 1;
int i;
char buf[40];
data = read_dev_sector(bdev, offset, §);
if (!data)
return;
p = (struct 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 */
printk(" %s: <minix:", partition_name(hd, minor, buf));
for (i = 0; i < MINIX_NR_SUBPARTITIONS; i++, p++) {
if ((*current_minor & mask) == 0)
break;
/* add each partition in use */
if (SYS_IND(p) == MINIX_PARTITION) {
add_gd_partition(hd, *current_minor,
START_SECT(p), NR_SECTS(p));
(*current_minor)++;
}
}
printk(" >\n");
}
put_dev_sector(sect);
#endif /* CONFIG_MINIX_SUBPARTITION */
}
/**
* read_lba(): Read bytes from disk, starting at given LBA
* @bdev
* @lba
* @buffer
* @size_t
*
* Description: Reads @count bytes from @bdev into @buffer.
* Returns number of bytes read on success, 0 on error.
*/
static size_t
read_lba(struct block_device *bdev, u64 lba, u8 * buffer, size_t count)
{
size_t totalreadcount = 0;
if (!bdev || !buffer || lba > last_lba(bdev))
return 0;
while (count) {
int copied = 512;
Sector sect;
unsigned char *data = read_dev_sector(bdev, lba++, §);
if (!data)
break;
if (copied > count)
copied = count;
memcpy(buffer, data, copied);
put_dev_sector(sect);
buffer += copied;
totalreadcount +=copied;
count -= copied;
}
return totalreadcount;
}
int sun_partition(struct parsed_partitions *state)
{
int i;
__be16 csum;
int slot = 1;
__be16 *ush;
Sector sect;
struct sun_disklabel {
unsigned char info[128]; /* Informative text string */
struct sun_vtoc {
__be32 version; /* Layout version */
char volume[8]; /* Volume name */
__be16 nparts; /* Number of partitions */
struct sun_info { /* Partition hdrs, sec 2 */
__be16 id;
__be16 flags;
} infos[8];
__be16 padding; /* Alignment padding */
__be32 bootinfo[3]; /* Info needed by mboot */
__be32 sanity; /* To verify vtoc sanity */
__be32 reserved[10]; /* Free space */
__be32 timestamp[8]; /* Partition timestamp */
} vtoc;
__be32 write_reinstruct; /* sectors to skip, writes */
__be32 read_reinstruct; /* sectors to skip, reads */
unsigned char spare[148]; /* Padding */
__be16 rspeed; /* Disk rotational speed */
__be16 pcylcount; /* Physical cylinder count */
__be16 sparecyl; /* extra sects per cylinder */
__be16 obs1; /* gap1 */
__be16 obs2; /* gap2 */
__be16 ilfact; /* Interleave factor */
__be16 ncyl; /* Data cylinder count */
__be16 nacyl; /* Alt. cylinder count */
__be16 ntrks; /* Tracks per cylinder */
__be16 nsect; /* Sectors per track */
__be16 obs3; /* bhead - Label head offset */
__be16 obs4; /* ppart - Physical Partition */
struct sun_partition {
__be32 start_cylinder;
__be32 num_sectors;
} partitions[8];
__be16 magic; /* Magic number */
__be16 csum; /* Label xor'd checksum */
} * label;
struct sun_partition *p;
unsigned long spc;
char b[BDEVNAME_SIZE];
int use_vtoc;
int nparts;
label = read_part_sector(state, 0, §);
if (!label)
return -1;
p = label->partitions;
if (be16_to_cpu(label->magic) != SUN_LABEL_MAGIC) {
/* printk(KERN_INFO "Dev %s Sun disklabel: bad magic %04x\n",
bdevname(bdev, b), be16_to_cpu(label->magic)); */
put_dev_sector(sect);
return 0;
}
/* Look at the checksum */
ush = ((__be16 *) (label+1)) - 1;
for (csum = 0; ush >= ((__be16 *) label);)
csum ^= *ush--;
if (csum) {
printk("Dev %s Sun disklabel: Csum bad, label corrupted\n",
bdevname(state->bdev, b));
put_dev_sector(sect);
return 0;
}
/* Check to see if we can use the VTOC table */
use_vtoc = ((be32_to_cpu(label->vtoc.sanity) == SUN_VTOC_SANITY) &&
(be32_to_cpu(label->vtoc.version) == 1) &&
(be16_to_cpu(label->vtoc.nparts) <= 8));
/* Use 8 partition entries if not specified in validated VTOC */
nparts = (use_vtoc) ? be16_to_cpu(label->vtoc.nparts) : 8;
/*
* So that old Linux-Sun partitions continue to work,
* alow the VTOC to be used under the additional condition ...
*/
use_vtoc = use_vtoc || !(label->vtoc.sanity ||
label->vtoc.version || label->vtoc.nparts);
spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect);
for (i = 0; i < nparts; i++, p++) {
unsigned long st_sector;
unsigned int num_sectors;
st_sector = be32_to_cpu(p->start_cylinder) * spc;
num_sectors = be32_to_cpu(p->num_sectors);
if (num_sectors) {
put_partition(state, slot, st_sector, num_sectors);
state->parts[slot].flags = 0;
if (use_vtoc) {
if (be16_to_cpu(label->vtoc.infos[i].id) == LINUX_RAID_PARTITION)
state->parts[slot].flags |= ADDPART_FLAG_RAID;
else if (be16_to_cpu(label->vtoc.infos[i].id) == SUN_WHOLE_DISK)
state->parts[slot].flags |= ADDPART_FLAG_WHOLEDISK;
}
}
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}
static void parse_extended(struct parsed_partitions *state,
sector_t first_sector, sector_t first_size)
{
struct partition *p;
Sector sect;
unsigned char *data;
sector_t this_sector, this_size;
sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
int loopct = 0; /* number of links followed
without finding a data partition */
int i;
this_sector = first_sector;
this_size = first_size;
while (1) {
if (++loopct > 100)
return;
if (state->next == state->limit)
return;
data = read_part_sector(state, this_sector, §);
if (!data)
return;
if (!msdos_magic_present(data + 510))
goto done;
p = (struct partition *) (data + 0x1be);
/*
* Usually, the first entry is the real data partition,
* the 2nd entry is the next extended partition, or empty,
* and the 3rd and 4th entries are unused.
* However, DRDOS sometimes has the extended partition as
* the first entry (when the data partition is empty),
* and OS/2 seems to use all four entries.
*/
/*
* First process the data partition(s)
*/
for (i=0; i<4; i++, p++) {
sector_t offs, size, next;
if (!nr_sects(p) || is_extended_partition(p))
continue;
/* Check the 3rd and 4th entries -
these sometimes contain random garbage */
offs = start_sect(p)*sector_size;
size = nr_sects(p)*sector_size;
next = this_sector + offs;
if (i >= 2) {
if (offs + size > this_size)
continue;
if (next < first_sector)
continue;
if (next + size > first_sector + first_size)
continue;
}
put_partition(state, state->next, next, size);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
state->parts[state->next].flags = ADDPART_FLAG_RAID;
loopct = 0;
if (++state->next == state->limit)
goto done;
}
/*
* Next, process the (first) extended partition, if present.
* (So far, there seems to be no reason to make
* parse_extended() recursive and allow a tree
* of extended partitions.)
* It should be a link to the next logical partition.
*/
p -= 4;
for (i=0; i<4; i++, p++)
if (nr_sects(p) && is_extended_partition(p))
break;
if (i == 4)
goto done; /* nothing left to do */
this_sector = first_sector + start_sect(p) * sector_size;
this_size = nr_sects(p) * sector_size;
put_dev_sector(sect);
}
done:
put_dev_sector(sect);
}
int msdos_partition(struct parsed_partitions *state)
{
sector_t sector_size = bdev_logical_block_size(state->bdev) / 512;
Sector sect;
unsigned char *data;
struct partition *p;
struct fat_boot_sector *fb;
int slot;
data = read_part_sector(state, 0, §);
if (!data)
return -1;
if (!msdos_magic_present(data + 510)) {
put_dev_sector(sect);
return 0;
}
if (aix_magic_present(state, data)) {
put_dev_sector(sect);
printk( " [AIX]");
return 0;
}
/*
* Now that the 55aa signature is present, this is probably
* either the boot sector of a FAT filesystem or a DOS-type
* partition table. Reject this in case the boot indicator
* is not 0 or 0x80.
*/
p = (struct 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
* its still possible this is valid FAT filesystem
* without a partition table.
*/
fb = (struct fat_boot_sector *) data;
if (slot == 1 && fb->reserved && fb->fats
&& fat_valid_media(fb->media)) {
printk("\n");
put_dev_sector(sect);
return 1;
} else {
put_dev_sector(sect);
return 0;
}
}
}
#ifdef CONFIG_EFI_PARTITION
p = (struct 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) {
put_dev_sector(sect);
return 0;
}
}
#endif
p = (struct partition *) (data + 0x1be);
/*
* Look for partitions in two passes:
* First find the primary and DOS-type extended partitions.
* On the second pass look inside *BSD, Unixware and Solaris partitions.
*/
state->next = 5;
for (slot = 1 ; slot <= 4 ; slot++, p++) {
sector_t start = start_sect(p)*sector_size;
sector_t size = nr_sects(p)*sector_size;
if (!size)
continue;
if (is_extended_partition(p)) {
/*
* prevent someone doing mkfs or mkswap on an
* extended partition, but leave room for LILO
* FIXME: this uses one logical sector for > 512b
* sector, although it may not be enough/proper.
*/
sector_t n = 2;
n = min(size, max(sector_size, n));
put_partition(state, slot, start, n);
printk(" <");
parse_extended(state, start, size);
printk(" >");
continue;
}
put_partition(state, slot, start, size);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
state->parts[slot].flags = ADDPART_FLAG_RAID;
if (SYS_IND(p) == DM6_PARTITION)
printk("[DM]");
if (SYS_IND(p) == EZD_PARTITION)
printk("[EZD]");
}
printk("\n");
/* second pass - output for each on a separate line */
p = (struct partition *) (0x1be + data);
for (slot = 1 ; slot <= 4 ; slot++, p++) {
unsigned char id = SYS_IND(p);
int n;
if (!nr_sects(p))
continue;
for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++)
;
if (!subtypes[n].parse)
continue;
subtypes[n].parse(state, start_sect(p) * sector_size,
nr_sects(p) * sector_size, slot);
}
put_dev_sector(sect);
return 1;
}
int osf_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int i;
int slot = 1;
unsigned int npartitions;
Sector sect;
unsigned char *data;
struct disklabel {
__le32 d_magic;
__le16 d_type,d_subtype;
u8 d_typename[16];
u8 d_packname[16];
__le32 d_secsize;
__le32 d_nsectors;
__le32 d_ntracks;
__le32 d_ncylinders;
__le32 d_secpercyl;
__le32 d_secprtunit;
__le16 d_sparespertrack;
__le16 d_sparespercyl;
__le32 d_acylinders;
__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
__le32 d_headswitch, d_trkseek, d_flags;
__le32 d_drivedata[5];
__le32 d_spare[5];
__le32 d_magic2;
__le16 d_checksum;
__le16 d_npartitions;
__le32 d_bbsize, d_sbsize;
struct d_partition {
__le32 p_size;
__le32 p_offset;
__le32 p_fsize;
u8 p_fstype;
u8 p_frag;
__le16 p_cpg;
} d_partitions[MAX_OSF_PARTITIONS];
} * label;
struct d_partition * partition;
data = read_dev_sector(bdev, 0, §);
if (!data)
return -1;
label = (struct disklabel *) (data+64);
partition = label->d_partitions;
if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
put_dev_sector(sect);
return 0;
}
if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
put_dev_sector(sect);
return 0;
}
npartitions = le16_to_cpu(label->d_npartitions);
if (npartitions > MAX_OSF_PARTITIONS) {
put_dev_sector(sect);
return 0;
}
for (i = 0 ; i < npartitions; i++, partition++) {
if (slot == state->limit)
break;
if (le32_to_cpu(partition->p_size))
put_partition(state, slot,
le32_to_cpu(partition->p_offset),
le32_to_cpu(partition->p_size));
slot++;
}
printk("\n");
put_dev_sector(sect);
return 1;
}
int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int sector_size = bdev_hardsect_size(bdev) / 512;
Sector sect;
unsigned char *data;
struct partition *p;
int slot;
data = read_dev_sector(bdev, 0, §);
if (!data)
return -1;
if (!msdos_magic_present(data + 510)) {
put_dev_sector(sect);
return 0;
}
if (aix_magic_present(data, bdev)) {
put_dev_sector(sect);
printk( " [AIX]");
return 0;
}
/*
* Now that the 55aa signature is present, this is probably
* either the boot sector of a FAT filesystem or a DOS-type
* partition table. Reject this in case the boot indicator
* is not 0 or 0x80.
*/
p = (struct partition *) (data + 0x1be);
for (slot = 1; slot <= 4; slot++, p++) {
if (p->boot_ind != 0 && p->boot_ind != 0x80) {
put_dev_sector(sect);
return 0;
}
}
#ifdef CONFIG_EFI_PARTITION
p = (struct 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) {
put_dev_sector(sect);
return 0;
}
}
#endif
p = (struct partition *) (data + 0x1be);
/*
* Look for partitions in two passes:
* First find the primary and DOS-type extended partitions.
* On the second pass look inside *BSD, Unixware and Solaris partitions.
*/
state->next = 5;
for (slot = 1 ; slot <= 4 ; slot++, p++) {
u32 start = START_SECT(p)*sector_size;
u32 size = NR_SECTS(p)*sector_size;
if (!size)
continue;
if (is_extended_partition(p)) {
/* prevent someone doing mkfs or mkswap on an
extended partition, but leave room for LILO */
put_partition(state, slot, start, size == 1 ? 1 : 2);
printk(" <");
parse_extended(state, bdev, start, size);
printk(" >");
continue;
}
put_partition(state, slot, start, size);
if (SYS_IND(p) == LINUX_RAID_PARTITION)
state->parts[slot].flags = 1;
if (SYS_IND(p) == DM6_PARTITION)
printk("[DM]");
if (SYS_IND(p) == EZD_PARTITION)
printk("[EZD]");
}
printk("\n");
/* second pass - output for each on a separate line */
p = (struct partition *) (0x1be + data);
for (slot = 1 ; slot <= 4 ; slot++, p++) {
unsigned char id = SYS_IND(p);
int n;
if (!NR_SECTS(p))
continue;
for (n = 0; subtypes[n].parse && id != subtypes[n].id; n++)
;
if (!subtypes[n].parse)
continue;
subtypes[n].parse(state, bdev, START_SECT(p)*sector_size,
NR_SECTS(p)*sector_size, slot);
}
put_dev_sector(sect);
return 1;
}
