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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
use std::collections::VecDeque;
use std::sync::Arc;
use futures::stream::*;
use hyper::Body;
use garage_util::data::*;
use garage_util::error::Error;
use garage_core::block::INLINE_THRESHOLD;
use garage_core::block_ref_table::*;
use garage_core::garage::Garage;
use garage_core::object_table::*;
use garage_core::version_table::*;
pub async fn handle_put(
garage: Arc<Garage>,
mime_type: &str,
bucket: &str,
key: &str,
body: Body,
) -> Result<UUID, Error> {
let version_uuid = gen_uuid();
let mut chunker = BodyChunker::new(body, garage.config.block_size);
let first_block = match chunker.next().await? {
Some(x) => x,
None => return Err(Error::BadRequest(format!("Empty body"))),
};
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: mime_type.to_string(),
size: first_block.len() as u64,
state: ObjectVersionState::Uploading,
data: ObjectVersionData::DeleteMarker,
};
if first_block.len() < INLINE_THRESHOLD {
object_version.data = ObjectVersionData::Inline(first_block);
object_version.state = ObjectVersionState::Complete;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
let version = Version::new(version_uuid, bucket.into(), key.into(), false, vec![]);
let first_block_hash = hash(&first_block[..]);
object_version.data = ObjectVersionData::FirstBlock(first_block_hash);
let object = Object::new(bucket.into(), key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
let mut next_offset = first_block.len();
let mut put_curr_version_block =
put_block_meta(garage.clone(), &version, 0, 0, first_block_hash);
let mut put_curr_block = garage
.block_manager
.rpc_put_block(first_block_hash, first_block);
loop {
let (_, _, next_block) =
futures::try_join!(put_curr_block, put_curr_version_block, chunker.next())?;
if let Some(block) = next_block {
let block_hash = hash(&block[..]);
let block_len = block.len();
put_curr_version_block =
put_block_meta(garage.clone(), &version, 0, next_offset as u64, block_hash);
put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
next_offset += block_len;
} else {
break;
}
}
// TODO: if at any step we have an error, we should undo everything we did
object_version.state = ObjectVersionState::Complete;
object_version.size = next_offset as u64;
let object = Object::new(bucket.into(), key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
Ok(version_uuid)
}
async fn put_block_meta(
garage: Arc<Garage>,
version: &Version,
part_number: u64,
offset: u64,
hash: Hash,
) -> Result<(), Error> {
// TODO: don't clone, restart from empty block list ??
let mut version = version.clone();
version
.add_block(VersionBlock {
part_number,
offset,
hash,
})
.unwrap();
let block_ref = BlockRef {
block: hash,
version: version.uuid,
deleted: false,
};
futures::try_join!(
garage.version_table.insert(&version),
garage.block_ref_table.insert(&block_ref),
)?;
Ok(())
}
struct BodyChunker {
body: Body,
read_all: bool,
block_size: usize,
buf: VecDeque<u8>,
}
impl BodyChunker {
fn new(body: Body, block_size: usize) -> Self {
Self {
body,
read_all: false,
block_size,
buf: VecDeque::new(),
}
}
async fn next(&mut self) -> Result<Option<Vec<u8>>, Error> {
while !self.read_all && self.buf.len() < self.block_size {
if let Some(block) = self.body.next().await {
let bytes = block?;
trace!("Body next: {} bytes", bytes.len());
self.buf.extend(&bytes[..]);
} else {
self.read_all = true;
}
}
if self.buf.len() == 0 {
Ok(None)
} else if self.buf.len() <= self.block_size {
let block = self.buf.drain(..).collect::<Vec<u8>>();
Ok(Some(block))
} else {
let block = self.buf.drain(..self.block_size).collect::<Vec<u8>>();
Ok(Some(block))
}
}
}
pub async fn handle_delete(garage: Arc<Garage>, bucket: &str, key: &str) -> Result<UUID, Error> {
let object = match garage
.object_table
.get(&bucket.to_string(), &key.to_string())
.await?
{
None => {
// No need to delete
return Ok([0u8; 32].into());
}
Some(o) => o,
};
let interesting_versions = object.versions().iter().filter(|v| {
v.data != ObjectVersionData::DeleteMarker && v.state != ObjectVersionState::Aborted
});
let mut must_delete = false;
let mut timestamp = now_msec();
for v in interesting_versions {
must_delete = true;
timestamp = std::cmp::max(timestamp, v.timestamp + 1);
}
if !must_delete {
return Ok([0u8; 32].into());
}
let version_uuid = gen_uuid();
let object = Object::new(
bucket.into(),
key.into(),
vec![ObjectVersion {
uuid: version_uuid,
timestamp: now_msec(),
mime_type: "application/x-delete-marker".into(),
size: 0,
state: ObjectVersionState::Complete,
data: ObjectVersionData::DeleteMarker,
}],
);
garage.object_table.insert(&object).await?;
return Ok(version_uuid);
}
|
