1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
use crate::proto::Directory;
use crate::{proto, B3Digest, Error};
use futures::stream::BoxStream;
use prost::Message;
use std::ops::Deref;
use std::path::Path;
use tonic::async_trait;
use tracing::{instrument, warn};
use super::utils::traverse_directory;
use super::{ClosureValidator, DirectoryPutter, DirectoryService};
#[derive(Clone)]
pub struct SledDirectoryService {
db: sled::Db,
}
impl SledDirectoryService {
pub fn new<P: AsRef<Path>>(p: P) -> Result<Self, sled::Error> {
let config = sled::Config::default()
.use_compression(false) // is a required parameter
.path(p);
let db = config.open()?;
Ok(Self { db })
}
pub fn new_temporary() -> Result<Self, sled::Error> {
let config = sled::Config::default().temporary(true);
let db = config.open()?;
Ok(Self { db })
}
}
#[async_trait]
impl DirectoryService for SledDirectoryService {
#[instrument(skip(self, digest), fields(directory.digest = %digest))]
async fn get(&self, digest: &B3Digest) -> Result<Option<proto::Directory>, Error> {
match self.db.get(digest.as_slice()) {
// The directory was not found, return
Ok(None) => Ok(None),
// The directory was found, try to parse the data as Directory message
Ok(Some(data)) => match Directory::decode(&*data) {
Ok(directory) => {
// Validate the retrieved Directory indeed has the
// digest we expect it to have, to detect corruptions.
let actual_digest = directory.digest();
if actual_digest != *digest {
return Err(Error::StorageError(format!(
"requested directory with digest {}, but got {}",
digest, actual_digest
)));
}
// Validate the Directory itself is valid.
if let Err(e) = directory.validate() {
warn!("directory failed validation: {}", e.to_string());
return Err(Error::StorageError(format!(
"directory {} failed validation: {}",
actual_digest, e,
)));
}
Ok(Some(directory))
}
Err(e) => {
warn!("unable to parse directory {}: {}", digest, e);
Err(Error::StorageError(e.to_string()))
}
},
// some storage error?
Err(e) => Err(Error::StorageError(e.to_string())),
}
}
#[instrument(skip(self, directory), fields(directory.digest = %directory.digest()))]
async fn put(&self, directory: proto::Directory) -> Result<B3Digest, Error> {
let digest = directory.digest();
// validate the directory itself.
if let Err(e) = directory.validate() {
return Err(Error::InvalidRequest(format!(
"directory {} failed validation: {}",
digest, e,
)));
}
// store it
let result = self.db.insert(digest.as_slice(), directory.encode_to_vec());
if let Err(e) = result {
return Err(Error::StorageError(e.to_string()));
}
Ok(digest)
}
#[instrument(skip_all, fields(directory.digest = %root_directory_digest))]
fn get_recursive(
&self,
root_directory_digest: &B3Digest,
) -> BoxStream<Result<proto::Directory, Error>> {
traverse_directory(self.clone(), root_directory_digest)
}
#[instrument(skip_all)]
fn put_multiple_start(&self) -> Box<(dyn DirectoryPutter + 'static)>
where
Self: Clone,
{
Box::new(SledDirectoryPutter {
tree: self.db.deref().clone(),
directory_validator: Some(Default::default()),
})
}
}
/// Buffers Directory messages to be uploaded and inserts them in a batch
/// transaction on close.
pub struct SledDirectoryPutter {
tree: sled::Tree,
/// The directories (inside the directory validator) that we insert later,
/// or None, if they were already inserted.
directory_validator: Option<ClosureValidator>,
}
#[async_trait]
impl DirectoryPutter for SledDirectoryPutter {
#[instrument(level = "trace", skip_all, fields(directory.digest=%directory.digest()), err)]
async fn put(&mut self, directory: proto::Directory) -> Result<(), Error> {
match self.directory_validator {
None => return Err(Error::StorageError("already closed".to_string())),
Some(ref mut validator) => {
validator.add(directory)?;
}
}
Ok(())
}
#[instrument(level = "trace", skip_all, ret, err)]
async fn close(&mut self) -> Result<B3Digest, Error> {
match self.directory_validator.take() {
None => Err(Error::InvalidRequest("already closed".to_string())),
Some(validator) => {
// retrieve the validated directories.
let directories = validator.finalize()?;
// Get the root digest, which is at the end (cf. insertion order)
let root_digest = directories
.last()
.ok_or_else(|| Error::InvalidRequest("got no directories".to_string()))?
.digest();
let mut batch = sled::Batch::default();
for directory in directories {
batch.insert(directory.digest().as_slice(), directory.encode_to_vec());
}
self.tree
.apply_batch(batch)
.map_err(|e| Error::StorageError(format!("unable to apply batch: {}", e)))?;
Ok(root_digest)
}
}
}
}
|