func (s *MountState) setSplice() {
s.canSplice = true
maxW := splice.MaxPipeSize() - 4096
if !splice.Resizable() && s.opts.MaxWrite > maxW {
s.opts.MaxWrite = maxW
}
}
func doInit(state *MountState, req *request) {
const (
FUSE_KERNEL_VERSION = 7
MINIMUM_MINOR_VERSION = 13
OUR_MINOR_VERSION = 16
)
input := (*raw.InitIn)(req.inData)
if input.Major != FUSE_KERNEL_VERSION {
log.Printf("Major versions does not match. Given %d, want %d\n", input.Major, FUSE_KERNEL_VERSION)
req.status = EIO
return
}
if input.Minor < MINIMUM_MINOR_VERSION {
log.Printf("Minor version is less than we support. Given %d, want at least %d\n", input.Minor, MINIMUM_MINOR_VERSION)
req.status = EIO
return
}
state.reqMu.Lock()
state.kernelSettings = *input
state.kernelSettings.Flags = input.Flags & (raw.CAP_ASYNC_READ | raw.CAP_BIG_WRITES | raw.CAP_FILE_OPS)
if input.Minor >= 13 {
state.canSplice = true
maxW := splice.MaxPipeSize() - 4096
if !splice.Resizable() && state.opts.MaxWrite > maxW {
state.opts.MaxWrite = maxW
}
}
state.reqMu.Unlock()
out := &raw.InitOut{
Major: FUSE_KERNEL_VERSION,
Minor: OUR_MINOR_VERSION,
MaxReadAhead: input.MaxReadAhead,
Flags: state.kernelSettings.Flags,
MaxWrite: uint32(state.opts.MaxWrite),
CongestionThreshold: uint16(state.opts.MaxBackground * 3 / 4),
MaxBackground: uint16(state.opts.MaxBackground),
}
if out.Minor > input.Minor {
out.Minor = input.Minor
}
req.outData = unsafe.Pointer(out)
req.status = OK
}