Initial commit

Proof-of-concept implementation. Bugs will occur.

vendor/github.com/hanwen/go-fuse/v2/internal/ioctl/ioctl.go

@@ -0,0 +1,45 @@
+package ioctl
+
+// https://github.com/torvalds/linux/blob/master/include/uapi/asm-generic/ioctl.h
+
+const (
+	NONE  = 0x0
+	READ  = 0x1
+	WRITE = 0x2
+)
+
+// The ioctl command. It encodes direction (read/write), argument size
+// and a type/number, where type should be globally unique and number
+// is unique to the driver.
+type Command uint32
+
+// New constructs an ioctl command. size should be less than 16kb.
+func New(dir byte, typ byte, nr byte, size uintptr) Command {
+	if size >= (1 << 14) {
+		panic("invalid ioctl sizeof")
+	}
+	return Command(dir)<<(14+16) |
+		Command(size)<<16 |
+		Command(typ)<<8 |
+		Command(nr)
+}
+
+// Read returns true if the ioctl reads data
+func (c Command) Read() bool {
+	return (c>>(14+16))&READ != 0
+}
+
+// Write returns true if the ioctl writes data
+func (c Command) Write() bool {
+	return (c>>(14+16))&WRITE != 0
+}
+
+// Number returns the lower 8 bits of the command
+func (c Command) Number() byte {
+	return byte(c & 0xff)
+}
+
+// Type returns the upper 8 bits of the command
+func (c Command) Type() byte {
+	return byte((c >> 8) & 0xff)
+}