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block_util: Derive thiserror::Error

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Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen 2022-08-10 16:05:54 -07:00 committed by Rob Bradford
parent 041acf2a65
commit 6a1e637a46
1 changed files with 24 additions and 12 deletions
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36
block_util/src/lib.rs
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@ -32,6 +32,7 @@ use std::path::Path;
use std::result;
use std::sync::Arc;
use std::sync::MutexGuard;
use thiserror::Error;
use versionize::{VersionMap, Versionize, VersionizeResult};
use versionize_derive::Versionize;
use virtio_bindings::bindings::virtio_blk::*;
@ -48,25 +49,25 @@ type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
const SECTOR_SHIFT: u8 = 9;
pub const SECTOR_SIZE: u64 = 0x01 << SECTOR_SHIFT;
#[derive(Debug)]
#[derive(Error, Debug)]
pub enum Error {
/// Guest gave us bad memory addresses.
#[error("Guest gave us bad memory addresses.")]
GuestMemory(GuestMemoryError),
/// Guest gave us offsets that would have overflowed a usize.
#[error("Guest gave us offsets that would have overflowed a usize.")]
CheckedOffset(GuestAddress, usize),
/// Guest gave us a write only descriptor that protocol says to read from.
#[error("Guest gave us a write only descriptor that protocol says to read from.")]
UnexpectedWriteOnlyDescriptor,
/// Guest gave us a read only descriptor that protocol says to write to.
#[error("Guest gave us a read only descriptor that protocol says to write to.")]
UnexpectedReadOnlyDescriptor,
/// Guest gave us too few descriptors in a descriptor chain.
#[error("Guest gave us too few descriptors in a descriptor chain.")]
DescriptorChainTooShort,
/// Guest gave us a descriptor that was too short to use.
#[error("Guest gave us a descriptor that was too short to use.")]
DescriptorLengthTooSmall,
/// Getting a block's metadata fails for any reason.
#[error("Getting a block's metadata fails for any reason.")]
GetFileMetadata,
/// The requested operation would cause a seek beyond disk end.
#[error("The requested operation would cause a seek beyond disk end.")]
InvalidOffset,
/// The requested operation does not support multiple descriptors.
#[error("The requested operation does not support multiple descriptors.")]
TooManyDescriptors,
}
@ -102,20 +103,31 @@ pub fn build_disk_image_id(disk_path: &Path) -> Vec<u8> {
default_disk_image_id
}
#[derive(Debug)]
#[derive(Error, Debug)]
pub enum ExecuteError {
#[error("Bad request: {0}")]
BadRequest(Error),
#[error("Falied to flush: {0}")]
Flush(io::Error),
#[error("Failed to read: {0}")]
Read(GuestMemoryError),
#[error("Failed to seek: {0}")]
Seek(io::Error),
#[error("Failed to write: {0}")]
Write(GuestMemoryError),
#[error("Unsupported request: {0}")]
Unsupported(u32),
#[error("Failed to submit io uring: {0}")]
SubmitIoUring(io::Error),
#[error("Failed to get guest address: {0}")]
GetHostAddress(GuestMemoryError),
#[error("Failed to async read: {0}")]
AsyncRead(AsyncIoError),
#[error("Failed to async write: {0}")]
AsyncWrite(AsyncIoError),
#[error("failed to async flush: {0}")]
AsyncFlush(AsyncIoError),
/// Failed allocating a temporary buffer.
#[error("Failed allocating a temporary buffer: {0}")]
TemporaryBufferAllocation(io::Error),
}