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d5f5648b37
We use cargo vendor to generate a .cargo/config file and the vendor directory. Vendoring allows us to lock our dependencies and to modify them easily from the top level Cargo.toml. We vendor all dependencies, including the crates.io ones, which allows for network isolated builds. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
79 lines
1.6 KiB
Rust
79 lines
1.6 KiB
Rust
// Copyright 2019 Intel Corporation. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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extern crate libc;
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mod tempdir;
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#[macro_use]
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pub mod ioctl;
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pub mod errno;
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pub mod eventfd;
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pub mod file_traits;
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pub mod seek_hole;
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pub mod signal;
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pub mod terminal;
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pub mod timerfd;
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pub mod write_zeroes;
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#[macro_use]
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pub mod syslog;
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pub mod poll;
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pub use crate::tempdir::*;
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pub use errno::*;
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pub use eventfd::*;
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pub use poll::*;
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use std::os::unix::io::AsRawFd;
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pub use crate::file_traits::{FileSetLen, FileSync};
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pub use crate::seek_hole::SeekHole;
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pub use crate::write_zeroes::{PunchHole, WriteZeroes};
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pub enum FallocateMode {
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PunchHole,
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ZeroRange,
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}
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/// Safe wrapper for `fallocate()`.
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pub fn fallocate(
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file: &dyn AsRawFd,
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mode: FallocateMode,
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keep_size: bool,
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offset: u64,
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len: u64,
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) -> Result<()> {
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let offset = if offset > libc::off64_t::max_value() as u64 {
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return Err(Error::new(libc::EINVAL));
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} else {
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offset as libc::off64_t
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};
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let len = if len > libc::off64_t::max_value() as u64 {
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return Err(Error::new(libc::EINVAL));
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} else {
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len as libc::off64_t
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};
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let mut mode = match mode {
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FallocateMode::PunchHole => libc::FALLOC_FL_PUNCH_HOLE,
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FallocateMode::ZeroRange => libc::FALLOC_FL_ZERO_RANGE,
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};
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if keep_size {
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mode |= libc::FALLOC_FL_KEEP_SIZE;
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}
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// Safe since we pass in a valid fd and fallocate mode, validate offset and len,
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// and check the return value.
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let ret = unsafe { libc::fallocate64(file.as_raw_fd(), mode, offset, len) };
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if ret < 0 {
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errno_result()
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} else {
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Ok(())
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}
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}
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