pub struct KernelConfig { /* private fields */ }Expand description
Configuration of the fuse kernel module connection
Implementations§
Source§impl KernelConfig
impl KernelConfig
Sourcepub fn set_max_stack_depth(&mut self, value: u32) -> Result<u32, u32>
pub fn set_max_stack_depth(&mut self, value: u32) -> Result<u32, u32>
Set the maximum stacking depth of the filesystem
This has to be at least 1 to support passthrough to backing files. Setting this to 0 (the default) effectively disables support for passthrough.
With max_stack_depth > 1, the backing files can be on a stacked fs (e.g. overlayfs)
themselves and with max_stack_depth == 1, this FUSE filesystem can be stacked as the
underlying fs of a stacked fs (e.g. overlayfs).
The kernel currently has a hard maximum value of 2. Anything higher won’t work.
On success, returns the previous value.
§Errors
If argument is too large, returns the nearest value which will succeed.
Sourcepub fn set_time_granularity(
&mut self,
value: Duration,
) -> Result<Duration, Duration>
pub fn set_time_granularity( &mut self, value: Duration, ) -> Result<Duration, Duration>
Set the timestamp granularity
Must be a power of 10 nanoseconds. i.e. 1s, 0.1s, 0.01s, 1ms, 0.1ms…etc
On success returns the previous value.
§Errors
If the argument does not match any valid granularity, returns the nearest value which will succeed.
Sourcepub fn set_max_write(&mut self, value: u32) -> Result<u32, u32>
pub fn set_max_write(&mut self, value: u32) -> Result<u32, u32>
Set the maximum write size for a single request
On success returns the previous value.
§Errors
If the argument is too large, returns the nearest value which will succeed.
Sourcepub fn set_max_readahead(&mut self, value: u32) -> Result<u32, u32>
pub fn set_max_readahead(&mut self, value: u32) -> Result<u32, u32>
Set the maximum readahead size
On success returns the previous value.
§Errors
If the argument is too large, returns the nearest value which will succeed.
Sourcepub fn capabilities(&self) -> InitFlags
pub fn capabilities(&self) -> InitFlags
Query kernel capabilities.
Sourcepub fn kernel_abi(&self) -> Version
pub fn kernel_abi(&self) -> Version
Kernel ABI version.
Sourcepub fn add_capabilities(
&mut self,
capabilities_to_add: InitFlags,
) -> Result<(), InitFlags>
pub fn add_capabilities( &mut self, capabilities_to_add: InitFlags, ) -> Result<(), InitFlags>
Add a set of capabilities.
§Errors
When the argument includes capabilities not supported by the kernel, returns the bits of the capabilities not supported.
Sourcepub fn set_max_background(&mut self, value: u16) -> Result<u16, u16>
pub fn set_max_background(&mut self, value: u16) -> Result<u16, u16>
Set the maximum number of pending background requests. Such as readahead requests.
On success returns the previous value.
§Errors
If the argument is too small, returns the nearest value which will succeed.
Sourcepub fn set_congestion_threshold(&mut self, value: u16) -> Result<u16, u16>
pub fn set_congestion_threshold(&mut self, value: u16) -> Result<u16, u16>
Set the threshold of background requests at which the kernel will consider the filesystem request queue congested. (it may then switch to sleeping instead of spin-waiting, for example)
On success returns the previous value.
§Errors
If the argument is too small, returns the nearest value which will succeed.