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wic: allow creation of partitions not in table

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For some architectures it is necessary to reserve space on disk without
it being present in the partition table.

For example, u-boot on i.mx is placed at an offset of 1kB on the sdcard.
While it would be possible to create a partition at that offset and
place u-boot there, it would then be necessary to update the default
u-boot environment to use partition 2 on the mmc instead of partition 1.

(From OE-Core rev: 233b631ece5ee14d057932c146327065064b5196)

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Alexandre Belloni
2015-02-08 23:52:00 +01:00
committed by Richard Purdie
parent f923f0fde8
commit 0b156dac83
4 changed files with 48 additions and 15 deletions
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20
scripts/lib/wic/utils/partitionedfs.py
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@@ -61,6 +61,7 @@ class Image:
self.disks[disk_name] = \
{ 'disk': None, # Disk object
'numpart': 0, # Number of allocate partitions
'realpart': 0, # Number of partitions in the partition table
'partitions': [], # Indexes to self.partitions
'offset': 0, # Offset of next partition (in sectors)
# Minimum required disk size to fit all partitions (in bytes)
@@ -85,7 +86,7 @@ class Image:
self.__add_disk(part['disk_name'])
def add_partition(self, size, disk_name, mountpoint, source_file = None, fstype = None,
label=None, fsopts = None, boot = False, align = None,
label=None, fsopts = None, boot = False, align = None, no_table=False,
part_type = None):
""" Add the next partition. Prtitions have to be added in the
first-to-last order. """
@@ -109,6 +110,7 @@ class Image:
'num': None, # Partition number
'boot': boot, # Bootable flag
'align': align, # Partition alignment
'no_table' : no_table, # Partition does not appear in partition table
'part_type' : part_type } # Partition type
self.__add_partition(part)
@@ -147,6 +149,8 @@ class Image:
# Get the disk where the partition is located
d = self.disks[p['disk_name']]
d['numpart'] += 1
if not p['no_table']:
d['realpart'] += 1
d['ptable_format'] = ptable_format
if d['numpart'] == 1:
@@ -156,7 +160,7 @@ class Image:
# Skip one sector required for the partitioning scheme overhead
d['offset'] += overhead
elif d['numpart'] > 3:
if d['realpart'] > 3:
# Reserve a sector for EBR for every logical partition
# before alignment is performed.
if ptable_format == "msdos":
@@ -189,12 +193,15 @@ class Image:
d['offset'] += p['size']
p['type'] = 'primary'
p['num'] = d['numpart']
if not p['no_table']:
p['num'] = d['realpart']
else:
p['num'] = 0
if d['ptable_format'] == "msdos":
if d['numpart'] > 3:
if d['realpart'] > 3:
p['type'] = 'logical'
p['num'] = d['numpart'] + 1
p['num'] = d['realpart'] + 1
d['partitions'].append(n)
msger.debug("Assigned %s to %s%d, sectors range %d-%d size %d "
@@ -256,6 +263,9 @@ class Image:
msger.debug("Creating partitions")
for p in self.partitions:
if p['num'] == 0:
continue
d = self.disks[p['disk_name']]
if d['ptable_format'] == "msdos" and p['num'] == 5:
# Create an extended partition (note: extended