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Various fixes to LVM2 #720

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Various fixes to LVM2 #720

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28 changes: 19 additions & 9 deletions filesystem/lvm2.ksy
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Original file line number Diff line number Diff line change
Expand Up @@ -13,17 +13,17 @@ meta:
- filesystem
- linux
license: GFDL-1.3-or-later
encoding: ascii
encoding: ASCII
endian: le
doc: |
### Building a test file

```
dd if=/dev/zero of=image.img bs=512 count=$(( 4 * 1024 * 2 ))
dd if=/dev/zero of=image.img bs=512 count=$(( 8 * 1024 * 2 ))
sudo losetup /dev/loop1 image.img
sudo pvcreate /dev/loop1
sudo vgcreate vg_test /dev/loop1
sudo lvcreate --name lv_test1 vg_test
sudo lvcreate --name lv_test1 vg_test -l100%FREE
sudo losetup -d /dev/loop1
```
doc-ref: https://github.com/libyal/libvslvm/blob/main/documentation/Logical%20Volume%20Manager%20(LVM)%20format.asciidoc
Expand Down Expand Up @@ -84,12 +84,12 @@ types:
- id: data_area_descriptors
type: data_area_descriptor
repeat: until
repeat-until: _.size != 0 and _.offset != 0
repeat-until: _.size == 0 and _.offset == 0
doc: "The last descriptor in the list is terminator and consists of 0-byte values."
- id: metadata_area_descriptors
type: metadata_area_descriptor
repeat: until
repeat-until: _.size != 0 and _.offset != 0
repeat-until: _.size == 0 and _.offset == 0
types:
data_area_descriptor:
seq:
Expand All @@ -103,6 +103,7 @@ types:
Can be 0. [yellow-background]*Does this represent all remaining available space?*
instances:
data:
io: _root._io
pos: offset
size: size
type: str
Expand All @@ -117,6 +118,7 @@ types:
doc: Value in bytes
instances:
data:
io: _root._io
pos: offset
size: size
type: metadata_area
Expand All @@ -130,7 +132,7 @@ types:
metadata_area_header:
seq:
- id: checksum
type: metadata_area_header
type: u4
doc: "CRC-32 for offset 4 to end of the metadata area header"
- id: signature
contents: " LVM2 x[5A%r0N*>"
Expand All @@ -145,15 +147,16 @@ types:
type: raw_location_descriptor
doc: "The last descriptor in the list is terminator and consists of 0-byte values."
repeat: until
repeat-until: _.offset != 0 and _.size != 0 and _.checksum != 0 # and _.flags != 0
repeat-until: _.offset == 0 and _.size == 0 and _.checksum == 0 # and _.flags == 0
instances:
metadata:
metadata_area:
io: _root._io
pos: metadata_area_offset
size: metadata_area_size
types:
raw_location_descriptor:
-orig-id: "raw_locn"
doc: "The data area size can be 0. It is assumed it represents the remaining available data."
doc: "The data area size can be 0. It is assumed it represents the remaining available data."
seq:
- id: offset
type: u8
Expand All @@ -170,3 +173,10 @@ types:
enums:
raw_location_descriptor_flags:
0x00000001: raw_location_ignored #The raw location descriptor should be ignored.
instances:
metadata:
io: _root._io
pos: offset + _parent.metadata_area_offset
size: size
type: strz
if: size != 0