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hypha: implement loop device support directly to avoid devd

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This commit is contained in:
Alex Zenla
2024-01-21 00:13:05 -08:00
parent 7d9652636f
commit ba156e43da
12 changed files with 765 additions and 21 deletions
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38
hypha/src/ctl/mod.rs
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@ -1,10 +1,12 @@
mod cfgblk;
pub mod cfgblk;
use crate::autoloop::AutoLoop;
use crate::ctl::cfgblk::ConfigBlock;
use crate::error::{HyphaError, Result};
use crate::error::Result;
use crate::image::cache::ImageCache;
use crate::image::name::ImageName;
use crate::image::{ImageCompiler, ImageInfo};
use loopdev::LoopControl;
use std::fs;
use std::path::PathBuf;
use uuid::Uuid;
@ -12,6 +14,7 @@ use xenclient::{DomainConfig, DomainDisk, XenClient};
pub struct Controller {
image_cache: ImageCache,
autoloop: AutoLoop,
image: String,
client: XenClient,
kernel_path: String,
@ -39,6 +42,7 @@ impl Controller {
let image_cache = ImageCache::new(&image_cache_path)?;
Ok(Controller {
image_cache,
autoloop: AutoLoop::new(LoopControl::open()?),
image,
client,
kernel_path,
@ -60,14 +64,13 @@ impl Controller {
let image_info = self.compile()?;
let cfgblk = ConfigBlock::new(&uuid, &image_info)?;
cfgblk.build()?;
let cfgblk_squashfs_path = cfgblk
.file
.to_str()
.ok_or_else(|| HyphaError::new("failed to convert config squashfs path to string"))?;
let image_squashfs_path = image_info
.image_squashfs
.to_str()
.ok_or_else(|| HyphaError::new("failed to convert image squashfs path to string"))?;
let image_squashfs_path = image_info.image_squashfs.clone();
let cfgblk_squashfs_path = cfgblk.file.clone();
let image_squashfs_loop = self.autoloop.loopify(&image_squashfs_path)?;
let cfgblk_squashfs_loop = self.autoloop.loopify(&cfgblk_squashfs_path)?;
let config = DomainConfig {
backend_domid: 0,
name: &name,
@ -79,17 +82,24 @@ impl Controller {
disks: vec![
DomainDisk {
vdev: "xvda",
pdev: image_squashfs_path,
block: &image_squashfs_loop,
writable: false,
},
DomainDisk {
vdev: "xvdb",
pdev: cfgblk_squashfs_path,
block: &cfgblk_squashfs_loop,
writable: false,
},
],
};
let domid = self.client.create(&config)?;
Ok(domid)
match self.client.create(&config) {
Ok(domid) => Ok(domid),
Err(error) => {
let _ = self.autoloop.unloop(&image_squashfs_loop.path);
let _ = self.autoloop.unloop(&cfgblk_squashfs_loop.path);
let _ = fs::remove_dir(&cfgblk.dir);
Err(error.into())
}
}
}
}