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| author | Luke Shumaker <lukeshu@lukeshu.com> | 2022-10-17 00:15:06 -0600 |
|---|---|---|
| committer | Luke Shumaker <lukeshu@lukeshu.com> | 2022-12-20 19:58:11 -0700 |
| commit | 53a2ce3b4dcbfd17ac15230da17130a2aeae42dc (patch) | |
| tree | 4d915a8ae475b82f53014b2c8c90a31932794168 /lib/btrfs/btrfsitem/item_extentdataref.go | |
| parent | 85169c799b4a0d4ba7d39347c07690dc0b49a1d1 (diff) | |
Add and improve comments
Diffstat (limited to 'lib/btrfs/btrfsitem/item_extentdataref.go')
| -rw-r--r-- | lib/btrfs/btrfsitem/item_extentdataref.go | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/btrfs/btrfsitem/item_extentdataref.go b/lib/btrfs/btrfsitem/item_extentdataref.go index 74ce799..8c856e2 100644 --- a/lib/btrfs/btrfsitem/item_extentdataref.go +++ b/lib/btrfs/btrfsitem/item_extentdataref.go @@ -9,10 +9,12 @@ import ( "git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsprim" ) +// key.objectid = laddr of the extent being referenced +// key.offset = crc32c([root,objectid,offset]) type ExtentDataRef struct { // EXTENT_DATA_REF=178 - Root btrfsprim.ObjID `bin:"off=0, siz=8"` - ObjectID btrfsprim.ObjID `bin:"off=8, siz=8"` - Offset int64 `bin:"off=16, siz=8"` - Count int32 `bin:"off=24, siz=4"` + Root btrfsprim.ObjID `bin:"off=0, siz=8"` // subvolume tree ID that references this extent + ObjectID btrfsprim.ObjID `bin:"off=8, siz=8"` // inode number that references this extent within the .Root subvolume + Offset int64 `bin:"off=16, siz=8"` // byte offset for the extent within the file + Count int32 `bin:"off=24, siz=4"` // reference count binstruct.End `bin:"off=28"` } |