parse_extended

Name:Create devices for each logical partition in an extended partition.* The logical partitions form a linked list, with each entry being* a partition table with two entries. The first entry* is the real data partition (with a start relative to the partition

Proto:static void parse_extended(struct parsed_partitions *state, sector_t first_sector, sector_t first_size, unsigned int disksig)

Type:void

Parameter:

Type	Parameter	Name
struct parsed_partitions *	state
sector_t	first_sector
sector_t	first_size
unsigned int	disksig

129

sector_size = bdev_logical_block_size(bdev) / 512

131

loopct = 0

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this_sector = first_sector

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this_size = first_size

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When 1 cycle

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If ++loopct > 100 Then Return

140

If next == limit Then Return

142

data = read_part_sector(state, this_sector, & sect)

143

If Not data Then Return

146

If Not msdos_magic_present(data + 510) Then Go to done

149

p = data + 0x1be

163

When i < 4 cycle

166

If Not nr_sects(p) || is_extended_partition(p) Then Continue

171

offs = start_sect(p) * sector_size

172

size = nr_sects(p) * sector_size

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next = this_sector + offs

174

If i >= 2 Then

175

If offs + size > this_size Then Continue

177

If next < first_sector Then Continue

179

If next + size > first_sector + first_size Then Continue

183

put_partition(state, next, next, size)

184

set_info(state, next, disksig)

185

If SYS_IND(p) == LINUX_RAID_PARTITION Then flags = ADDPART_FLAG_RAID

187

loopct = 0

188

If ++next == limit Then Go to done

198

p -= 4

199

When i < 4 cycle If nr_sects(p) && is_extended_partition(p) Then

201

Break

202

If i == 4 Then Go to done

205

this_sector = first_sector + start_sect(p) * sector_size

206

this_size = nr_sects(p) * sector_size

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put_dev_sector(sect)

209

done :

210

put_dev_sector(sect)

**Caller**
Name	Describe
msdos_partition

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