diff options
author | Kayla Firestack <dev@kaylafire.me> | 2021-10-18 13:27:51 -0400 |
---|---|---|
committer | Kayla Firestack <dev@kaylafire.me> | 2021-10-18 16:30:52 -0400 |
commit | 1f8fc31ddc1975a1f2e7c2fa8f7f611eab761680 (patch) | |
tree | 62eef03a32544a61c45665e6c4b4ea8014fd6fc8 /rust-src/bch_bindgen/src/rs.rs | |
parent | 7e97ef59bd30154776417748b6518ec43a3db2b9 (diff) |
split mount into a library crate for rust reuse
update makefile to output shared library and rust build
fix default.nix to properly get the binary name for `ln`ing - move binary to main.rs
add rustfmt and gitignore files
move build.rs file into bch_bindgen for reuse between projects
add outputs to nix flake and checks
add mount.toml to makefile
Diffstat (limited to 'rust-src/bch_bindgen/src/rs.rs')
-rw-r--r-- | rust-src/bch_bindgen/src/rs.rs | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/rust-src/bch_bindgen/src/rs.rs b/rust-src/bch_bindgen/src/rs.rs new file mode 100644 index 00000000..4452f0b2 --- /dev/null +++ b/rust-src/bch_bindgen/src/rs.rs @@ -0,0 +1,58 @@ +use crate::bcachefs; + +pub const SUPERBLOCK_MAGIC: uuid::Uuid = uuid::Uuid::from_u128( + 0x_c68573f6_4e1a_45ca_8265_f57f48ba6d81 +); + +extern "C" { + pub static stdout: *mut libc::FILE; +} + +pub enum ReadSuperErr { + Io(std::io::Error), +} + +type RResult<T> = std::io::Result<std::io::Result<T>>; + +#[tracing_attributes::instrument(skip(opts))] +pub fn read_super_opts(path: &std::path::Path, mut opts: bcachefs::bch_opts) -> RResult<bcachefs::bch_sb_handle> { + // let devp = camino::Utf8Path::from_path(devp).unwrap(); + + use std::os::unix::ffi::OsStrExt; + let path = std::ffi::CString::new(path.as_os_str().as_bytes())?; + + let mut sb = std::mem::MaybeUninit::zeroed(); + + // use gag::{BufferRedirect}; + // // Stop libbcachefs from spamming the output + // let gag = BufferRedirect::stderr().unwrap(); + // tracing::trace!("entering libbcachefs"); + + let ret = unsafe { crate::bcachefs::bch2_read_super(path.as_ptr(), &mut opts, sb.as_mut_ptr()) }; + tracing::trace!(%ret); + + match -ret { + libc::EACCES => Err(std::io::Error::new( + std::io::ErrorKind::PermissionDenied, + "Access Permission Denied", + )), + 0 => Ok(Ok(unsafe { sb.assume_init() })), + 22 => Ok(Err(std::io::Error::new( + std::io::ErrorKind::InvalidData, + "Not a BCacheFS SuperBlock", + ))), + code => { + tracing::debug!(msg = "BCacheFS return error code", ?code); + Ok(Err(std::io::Error::new( + std::io::ErrorKind::Other, + "Failed to Read SuperBlock", + ))) + } + } +} + +#[tracing_attributes::instrument] +pub fn read_super(path: &std::path::Path) -> RResult<bcachefs::bch_sb_handle> { + let opts = bcachefs::bch_opts::default(); //unsafe {std::mem::MaybeUninit::zeroed().assume_init()}; + read_super_opts(path, opts) +} |