git.sesse.net Git - bcachefs-tools-debian/blob - rust-src/bch_bindgen/src/rs.rs

   1 use crate::bcachefs;
   2
   3 pub const SUPERBLOCK_MAGIC: uuid::Uuid = uuid::Uuid::from_u128(
   4         0x_c68573f6_4e1a_45ca_8265_f57f48ba6d81
   5 );
   6
   7 extern "C" {
   8         pub static stdout: *mut libc::FILE;
   9 }
  10
  11 pub enum ReadSuperErr {
  12         Io(std::io::Error),
  13 }
  14
  15 type RResult<T> = std::io::Result<std::io::Result<T>>;
  16
  17 #[tracing_attributes::instrument(skip(opts))]
  18 pub fn read_super_opts(path: &std::path::Path, mut opts: bcachefs::bch_opts) -> RResult<bcachefs::bch_sb_handle> {
  19         // let devp = camino::Utf8Path::from_path(devp).unwrap();
  20
  21         use std::os::unix::ffi::OsStrExt;
  22         let path = std::ffi::CString::new(path.as_os_str().as_bytes())?;
  23
  24         let mut sb = std::mem::MaybeUninit::zeroed();
  25
  26         // use gag::{BufferRedirect};
  27         // // Stop libbcachefs from spamming the output
  28         // let gag = BufferRedirect::stderr().unwrap();
  29         // tracing::trace!("entering libbcachefs");
  30
  31         let ret = unsafe { crate::bcachefs::bch2_read_super(path.as_ptr(), &mut opts, sb.as_mut_ptr()) };
  32         tracing::trace!(%ret);
  33
  34         match -ret {
  35                 libc::EACCES => Err(std::io::Error::new(
  36                         std::io::ErrorKind::PermissionDenied,
  37                         "Access Permission Denied",
  38                 )),
  39                 0 => Ok(Ok(unsafe { sb.assume_init() })),
  40                 22 => Ok(Err(std::io::Error::new(
  41                         std::io::ErrorKind::InvalidData,
  42                         "Not a BCacheFS SuperBlock",
  43                 ))),
  44                 code => {
  45                         tracing::debug!(msg = "BCacheFS return error code", ?code);
  46                         Ok(Err(std::io::Error::new(
  47                                 std::io::ErrorKind::Other,
  48                                 "Failed to Read SuperBlock",
  49                         )))
  50                 }
  51         }
  52 }
  53
  54 #[tracing_attributes::instrument]
  55 pub fn read_super(path: &std::path::Path) -> RResult<bcachefs::bch_sb_handle> {
  56         let opts = bcachefs::bch_opts::default(); //unsafe {std::mem::MaybeUninit::zeroed().assume_init()};
  57         read_super_opts(path, opts)
  58 }