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virtio-devices: iommu: Switch to use 'thiserror'

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Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen 2022-10-13 12:05:45 -07:00 committed by Rob Bradford
parent 0235ed3388
commit 84105992b7
1 changed files with 19 additions and 53 deletions
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72
virtio-devices/src/iommu.rs
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@ -14,7 +14,6 @@ use crate::{DmaRemapping, VirtioInterrupt, VirtioInterruptType};
use anyhow::anyhow;
use seccompiler::SeccompAction;
use std::collections::BTreeMap;
use std::fmt::{self, Display};
use std::io;
use std::mem::size_of;
use std::ops::Bound::Included;
@ -22,6 +21,7 @@ use std::os::unix::io::AsRawFd;
use std::result;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::{Arc, Barrier, Mutex, RwLock};
use thiserror::Error;
use versionize::{VersionMap, Versionize, VersionizeResult};
use versionize_derive::Versionize;
use virtio_queue::{DescriptorChain, Queue, QueueT};
@ -282,78 +282,44 @@ unsafe impl ByteValued for VirtioIommuProbeProperty {}
unsafe impl ByteValued for VirtioIommuProbeResvMem {}
unsafe impl ByteValued for VirtioIommuFault {}
#[derive(Debug)]
#[derive(Error, Debug)]
enum Error {
/// Guest gave us bad memory addresses.
#[error("Guest gave us bad memory addresses: {0}.")]
GuestMemory(GuestMemoryError),
/// 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 buffer that was too short to use.
#[error("Guest gave us a buffer that was too short to use.")]
BufferLengthTooSmall,
/// Guest sent us invalid request.
#[error("Guest sent us invalid request.")]
InvalidRequest,
/// Guest sent us invalid ATTACH request.
#[error("Guest sent us invalid ATTACH request.")]
InvalidAttachRequest,
/// Guest sent us invalid DETACH request.
#[error("Guest sent us invalid DETACH request.")]
InvalidDetachRequest,
/// Guest sent us invalid MAP request.
#[error("Guest sent us invalid MAP request.")]
InvalidMapRequest,
/// Invalid to map because the domain is in bypass mode.
#[error("Invalid to map because the domain is in bypass mode.")]
InvalidMapRequestBypassDomain,
/// Invalid to map because the domain is missing.
#[error("Invalid to map because the domain is missing.")]
InvalidMapRequestMissingDomain,
/// Guest sent us invalid UNMAP request.
#[error("Guest sent us invalid UNMAP request.")]
InvalidUnmapRequest,
/// Invalid to unmap because the domain is in bypass mode.
#[error("Invalid to unmap because the domain is in bypass mode.")]
InvalidUnmapRequestBypassDomain,
/// Invalid to unmap because the domain is missing.
#[error("Invalid to unmap because the domain is missing.")]
InvalidUnmapRequestMissingDomain,
/// Guest sent us invalid PROBE request.
#[error("Guest sent us invalid PROBE request.")]
InvalidProbeRequest,
/// Failed to performing external mapping.
#[error("Failed to performing external mapping: {0}.")]
ExternalMapping(io::Error),
/// Failed to performing external unmapping.
#[error("Failed to performing external unmapping: {0}.")]
ExternalUnmapping(io::Error),
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
match self {
BufferLengthTooSmall => write!(f, "buffer length too small"),
DescriptorChainTooShort => write!(f, "descriptor chain too short"),
GuestMemory(e) => write!(f, "bad guest memory address: {}", e),
InvalidRequest => write!(f, "invalid request"),
InvalidAttachRequest => write!(f, "invalid attach request"),
InvalidDetachRequest => write!(f, "invalid detach request"),
InvalidMapRequest => write!(f, "invalid map request"),
InvalidMapRequestBypassDomain => {
write!(f, "invalid map request because domain in bypass mode")
}
InvalidMapRequestMissingDomain => {
write!(f, "invalid map request because missing domain")
}
InvalidUnmapRequest => write!(f, "invalid unmap request"),
InvalidUnmapRequestBypassDomain => {
write!(f, "invalid unmap request because domain in bypass mode")
}
InvalidUnmapRequestMissingDomain => {
write!(f, "invalid unmap request because missing domain")
}
InvalidProbeRequest => write!(f, "invalid probe request"),
UnexpectedReadOnlyDescriptor => write!(f, "unexpected read-only descriptor"),
UnexpectedWriteOnlyDescriptor => write!(f, "unexpected write-only descriptor"),
ExternalMapping(e) => write!(f, "failed performing external mapping: {}", e),
ExternalUnmapping(e) => write!(f, "failed performing external unmapping: {}", e),
}
}
}
struct Request {}
impl Request {