fuse_in_header — the 40-byte prefix on every request the kernel
sends to userspace.
Layout (little-endian):
+-------+--------+----------------------------------+
| off | size | field |
+-------+--------+----------------------------------+
| 0 | u32 | len (total frame length) |
| 4 | u32 | opcode |
| 8 | u64 | unique (matches in reply) |
| 16 | u64 | nodeid (target inode) |
| 24 | u32 | uid |
| 28 | u32 | gid |
| 32 | u32 | pid |
| 36 | u32 | padding (zero) |
+-------+--------+----------------------------------+Summary
Functions
Encode a header struct back to bytes. padding is always written as
zero. Primarily a test helper — production code never emits a
request header (the kernel does that).
Size of the on-wire header in bytes (always 40).
Split a complete request frame into its header and body. Validates
that header.len matches the frame size.
Types
@type t() :: %Wick.Protocol.InHeader{ gid: non_neg_integer(), len: non_neg_integer(), nodeid: non_neg_integer(), opcode: non_neg_integer(), pid: non_neg_integer(), uid: non_neg_integer(), unique: non_neg_integer() }
Decoded request header.
Functions
Encode a header struct back to bytes. padding is always written as
zero. Primarily a test helper — production code never emits a
request header (the kernel does that).
@spec size() :: 40
Size of the on-wire header in bytes (always 40).
Split a complete request frame into its header and body. Validates
that header.len matches the frame size.