diff options
| author | Luke Shumaker <lukeshu@lukeshu.com> | 2022-06-26 15:53:49 -0600 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@lukeshu.com> | 2022-06-26 15:53:49 -0600 |
| commit | 6a1b5c780b8fbb9ca0285286036096960458d4e6 (patch) | |
| tree | d25b258039bfcdea66fbdfd698431d2673e520ec /pkg/btrfs/btrfsitem | |
| parent | fce6934cf76f4dfb04ea6eef1e2cd55c172beb1b (diff) | |
Add an AddrDelta type for safer arithmentic
Diffstat (limited to 'pkg/btrfs/btrfsitem')
| -rw-r--r-- | pkg/btrfs/btrfsitem/item_blockgroup.go | 2 | ||||
| -rw-r--r-- | pkg/btrfs/btrfsitem/item_chunk.go | 21 | ||||
| -rw-r--r-- | pkg/btrfs/btrfsitem/item_devextent.go | 4 |
3 files changed, 17 insertions, 10 deletions
diff --git a/pkg/btrfs/btrfsitem/item_blockgroup.go b/pkg/btrfs/btrfsitem/item_blockgroup.go index a28d4bf..737cfa0 100644 --- a/pkg/btrfs/btrfsitem/item_blockgroup.go +++ b/pkg/btrfs/btrfsitem/item_blockgroup.go @@ -6,6 +6,8 @@ import ( "lukeshu.com/btrfs-tools/pkg/util" ) +// key.objectid = logical_addr +// key.offset = size of chunk type BlockGroup struct { // BLOCK_GROUP_ITEM=192 Used int64 `bin:"off=0, siz=8"` ChunkObjectID internal.ObjID `bin:"off=8, siz=8"` diff --git a/pkg/btrfs/btrfsitem/item_chunk.go b/pkg/btrfs/btrfsitem/item_chunk.go index eb3a16d..8f98ba1 100644 --- a/pkg/btrfs/btrfsitem/item_chunk.go +++ b/pkg/btrfs/btrfsitem/item_chunk.go @@ -8,21 +8,24 @@ import ( ) // Maps logical address to physical. +// +// key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID +// key.offset = logical_addr type Chunk struct { // CHUNK_ITEM=228 Head ChunkHeader Stripes []ChunkStripe } type ChunkHeader struct { - Size uint64 `bin:"off=0x0, siz=0x8"` - Owner internal.ObjID `bin:"off=0x8, siz=0x8"` // root referencing this chunk (always EXTENT_TREE_OBJECTID=2) - StripeLen uint64 `bin:"off=0x10, siz=0x8"` // ??? - Type BlockGroupFlags `bin:"off=0x18, siz=0x8"` - IOOptimalAlign uint32 `bin:"off=0x20, siz=0x4"` - IOOptimalWidth uint32 `bin:"off=0x24, siz=0x4"` - IOMinSize uint32 `bin:"off=0x28, siz=0x4"` // sector size - NumStripes uint16 `bin:"off=0x2c, siz=0x2"` // [ignored-when-writing] - SubStripes uint16 `bin:"off=0x2e, siz=0x2"` // ??? + Size internal.AddrDelta `bin:"off=0x0, siz=0x8"` + Owner internal.ObjID `bin:"off=0x8, siz=0x8"` // root referencing this chunk (always EXTENT_TREE_OBJECTID=2) + StripeLen uint64 `bin:"off=0x10, siz=0x8"` // ??? + Type BlockGroupFlags `bin:"off=0x18, siz=0x8"` + IOOptimalAlign uint32 `bin:"off=0x20, siz=0x4"` + IOOptimalWidth uint32 `bin:"off=0x24, siz=0x4"` + IOMinSize uint32 `bin:"off=0x28, siz=0x4"` // sector size + NumStripes uint16 `bin:"off=0x2c, siz=0x2"` // [ignored-when-writing] + SubStripes uint16 `bin:"off=0x2e, siz=0x2"` // ??? binstruct.End `bin:"off=0x30"` } diff --git a/pkg/btrfs/btrfsitem/item_devextent.go b/pkg/btrfs/btrfsitem/item_devextent.go index dfa6d03..7f08b5e 100644 --- a/pkg/btrfs/btrfsitem/item_devextent.go +++ b/pkg/btrfs/btrfsitem/item_devextent.go @@ -5,11 +5,13 @@ import ( "lukeshu.com/btrfs-tools/pkg/btrfs/internal" ) +// key.objectid = device_id +// key.offset = physical_addr type DevExtent struct { // DEV_EXTENT=204 ChunkTree int64 `bin:"off=0, siz=8"` ChunkObjectID internal.ObjID `bin:"off=8, siz=8"` ChunkOffset internal.LogicalAddr `bin:"off=16, siz=8"` - Length uint64 `bin:"off=24, siz=8"` + Length internal.AddrDelta `bin:"off=24, siz=8"` ChunkTreeUUID internal.UUID `bin:"off=32, siz=16"` binstruct.End `bin:"off=48"` } |