bcachefs-tools/bch_bindgen/src/sb_io.rs

use crate::bcachefs;
use crate::bcachefs::*;
use crate::errcode::bch_errcode;
use crate::path_to_cstr;
use anyhow::anyhow;

pub use crate::bcachefs::bch2_free_super;

pub fn read_super_opts(
    path: &std::path::Path,
    mut opts: bch_opts,
) -> anyhow::Result<bch_sb_handle> {
    let path = path_to_cstr(path);
    let mut sb = std::mem::MaybeUninit::zeroed();

    let ret =
        unsafe { crate::bcachefs::bch2_read_super(path.as_ptr(), &mut opts, sb.as_mut_ptr()) };

    if ret != 0 {
        let err: bch_errcode = unsafe { ::std::mem::transmute(ret) };
        Err(anyhow!(err))
    } else {
        Ok(unsafe { sb.assume_init() })
    }
}

pub fn read_super(path: &std::path::Path) -> anyhow::Result<bch_sb_handle> {
    let opts = bcachefs::bch_opts::default();
    read_super_opts(path, opts)
}

pub fn read_super_silent(
    path: &std::path::Path,
    mut opts: bch_opts,
) -> anyhow::Result<bch_sb_handle> {
    let path = path_to_cstr(path);
    let mut sb = std::mem::MaybeUninit::zeroed();

    let ret = unsafe {
        crate::bcachefs::bch2_read_super_silent(path.as_ptr(), &mut opts, sb.as_mut_ptr())
    };

    if ret != 0 {
        let err: bch_errcode = unsafe { ::std::mem::transmute(ret) };
        Err(anyhow!(err))
    } else {
        Ok(unsafe { sb.assume_init() })
    }
}