applied: [PATCH proxmox v5 01/13] proxmox-sys: expose msync to flush mmapped contents to filesystem

["Fabian Grünbichler" <f.gruenbichler@proxmox.com>]

and bumped

On March 11, 2026 2:07 pm, Christian Ebner wrote:
> Allows to flush all in-memory contents of the mmapped file back to
> the filesystem using msync [0] given the semantics provided via the
> `MS_*` flags.
> Without this the contents are not guaranteed to be persisted to the
> backing file until unmapped, which could lead to data loss on system
> crash or OOM situations.
> 
> [0] https://man7.org/linux/man-pages/man2/msync.2.html
> 
> Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
> ---
>  proxmox-sys/src/mmap.rs | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/proxmox-sys/src/mmap.rs b/proxmox-sys/src/mmap.rs
> index 8b8ad8a6..e15ca1db 100644
> --- a/proxmox-sys/src/mmap.rs
> +++ b/proxmox-sys/src/mmap.rs
> @@ -56,6 +56,18 @@ impl<T> Mmap<T> {
>              len: count,
>          })
>      }
> +
> +    /// Flush all in-memory contents to the backing file.
> +    pub fn msync(&self, flags: mman::MsFlags) -> io::Result<()> {
> +        unsafe {
> +            mman::msync(
> +                self.data.cast::<core::ffi::c_void>(),
> +                self.len * mem::size_of::<T>(),
> +                flags,
> +            )
> +        }
> +        .map_err(SysError::into_io_error)
> +    }
>  }
>  
>  impl<T> std::ops::Deref for Mmap<T> {
> -- 
> 2.47.3
> 
> 
> 
> 
> 
>