use std::collections::{BTreeMap, HashMap};
use std::sync::Arc;
use base64::prelude::*;
use futures::prelude::*;
use futures::try_join;
use hyper::body::{Body, Bytes};
use hyper::header::{HeaderMap, HeaderValue};
use hyper::{Request, Response};
use md5::{digest::generic_array::*, Digest as Md5Digest, Md5};
use sha2::Sha256;
use opentelemetry::{
trace::{FutureExt as OtelFutureExt, TraceContextExt, Tracer},
Context,
};
use garage_rpc::netapp::bytes_buf::BytesBuf;
use garage_table::*;
use garage_util::async_hash::*;
use garage_util::data::*;
use garage_util::error::Error as GarageError;
use garage_util::time::*;
use garage_block::manager::INLINE_THRESHOLD;
use garage_model::bucket_table::Bucket;
use garage_model::garage::Garage;
use garage_model::index_counter::CountedItem;
use garage_model::s3::block_ref_table::*;
use garage_model::s3::object_table::*;
use garage_model::s3::version_table::*;
use crate::s3::error::*;
pub async fn handle_put(
garage: Arc<Garage>,
req: Request<Body>,
bucket: &Bucket,
key: &String,
content_sha256: Option<Hash>,
) -> Result<Response<Body>, Error> {
// Retrieve interesting headers from request
let headers = get_headers(req.headers())?;
debug!("Object headers: {:?}", headers);
let content_md5 = match req.headers().get("content-md5") {
Some(x) => Some(x.to_str()?.to_string()),
None => None,
};
let (_head, body) = req.into_parts();
let body = body.map_err(Error::from);
save_stream(
garage,
headers,
body,
bucket,
key,
content_md5,
content_sha256,
)
.await
.map(|(uuid, md5)| put_response(uuid, md5))
}
pub(crate) async fn save_stream<S: Stream<Item = Result<Bytes, Error>> + Unpin>(
garage: Arc<Garage>,
headers: ObjectVersionHeaders,
body: S,
bucket: &Bucket,
key: &String,
content_md5: Option<String>,
content_sha256: Option<FixedBytes32>,
) -> Result<(Uuid, String), Error> {
let mut chunker = StreamChunker::new(body, garage.config.block_size);
let (first_block_opt, existing_object) = try_join!(
chunker.next(),
garage
.object_table
.get(&bucket.id, key)
.map_err(Error::from),
)?;
let first_block = first_block_opt.unwrap_or_default();
// Generate identity of new version
let version_uuid = gen_uuid();
let version_timestamp = next_timestamp(existing_object.as_ref());
// If body is small enough, store it directly in the object table
// as "inline data". We can then return immediately.
if first_block.len() < INLINE_THRESHOLD {
let mut md5sum = Md5::new();
md5sum.update(&first_block[..]);
let data_md5sum = md5sum.finalize();
let data_md5sum_hex = hex::encode(data_md5sum);
let data_sha256sum = sha256sum(&first_block[..]);
let size = first_block.len() as u64;
ensure_checksum_matches(
data_md5sum.as_slice(),
data_sha256sum,
content_md5.as_deref(),
content_sha256,
)?;
check_quotas(&garage, bucket, size, existing_object.as_ref()).await?;
let object_version = ObjectVersion {
uuid: version_uuid,
timestamp: version_timestamp,
state: ObjectVersionState::Complete(ObjectVersionData::Inline(
ObjectVersionMeta {
headers,
size,
etag: data_md5sum_hex.clone(),
},
first_block.to_vec(),
)),
};
let object = Object::new(bucket.id, key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
return Ok((version_uuid, data_md5sum_hex));
}
// The following consists in many steps that can each fail.
// Keep track that some cleanup will be needed if things fail
// before everything is finished (cleanup is done using the Drop trait).
let mut interrupted_cleanup = InterruptedCleanup(Some(InterruptedCleanupInner {
garage: garage.clone(),
bucket_id: bucket.id,
key: key.into(),
version_uuid,
version_timestamp,
}));
// Write version identifier in object table so that we have a trace
// that we are uploading something
let mut object_version = ObjectVersion {
uuid: version_uuid,
timestamp: version_timestamp,
state: ObjectVersionState::Uploading {
headers: headers.clone(),
multipart: false,
},
};
let object = Object::new(bucket.id, key.into(), vec![object_version.clone()]);
garage.object_table.insert(&object).await?;
// Initialize corresponding entry in version table
// Write this entry now, even with empty block list,
// to prevent block_ref entries from being deleted (they can be deleted
// if the reference a version that isn't found in the version table)
let version = Version::new(
version_uuid,
VersionBacklink::Object {
bucket_id: bucket.id,
key: key.into(),
},
false,
);
garage.version_table.insert(&version).await?;
// Transfer data and verify checksum
let first_block_hash = async_blake2sum(first_block.clone()).await;
let (total_size, data_md5sum, data_sha256sum) = read_and_put_blocks(
&garage,
&version,
1,
first_block,
first_block_hash,
&mut chunker,
)
.await?;
ensure_checksum_matches(
data_md5sum.as_slice(),
data_sha256sum,
content_md5.as_deref(),
content_sha256,
)?;
check_quotas(&garage, bucket, total_size, existing_object.as_ref()).await?;
// Save final object state, marked as Complete
let md5sum_hex = hex::encode(data_md5sum);
object_version.state = ObjectVersionState::Complete(ObjectVersionData::FirstBlock(
ObjectVersionMeta {
headers,
size: total_size,
etag: md5sum_hex.clone(),
},
first_block_hash,
));
let object = Object::new(bucket.id, key.into(), vec![object_version]);
garage.object_table.insert(&object).await?;
// We were not interrupted, everything went fine.
// We won't have to clean up on drop.
interrupted_cleanup.cancel();
Ok((version_uuid, md5sum_hex))
}
/// Validate MD5 sum against content-md5 header
/// and sha256sum against signed content-sha256
pub(crate) fn ensure_checksum_matches(
data_md5sum: &[u8],
data_sha256sum: garage_util::data::FixedBytes32,
content_md5: Option<&str>,
content_sha256: Option<garage_util::data::FixedBytes32>,
) -> Result<(), Error> {
if let Some(expected_sha256) = content_sha256 {
if expected_sha256 != data_sha256sum {
return Err(Error::bad_request(
"Unable to validate x-amz-content-sha256",
));
} else {
trace!("Successfully validated x-amz-content-sha256");
}
}
if let Some(expected_md5) = content_md5 {
if expected_md5.trim_matches('"') != BASE64_STANDARD.encode(data_md5sum) {
return Err(Error::bad_request("Unable to validate content-md5"));
} else {
trace!("Successfully validated content-md5");
}
}
Ok(())
}
/// Check that inserting this object with this size doesn't exceed bucket quotas
pub(crate) async fn check_quotas(
garage: &Arc<Garage>,
bucket: &Bucket,
size: u64,
prev_object: Option<&Object>,
) -> Result<(), Error> {
let quotas = bucket.state.as_option().unwrap().quotas.get();
if quotas.max_objects.is_none() && quotas.max_size.is_none() {
return Ok(());
};
let counters = garage
.object_counter_table
.table
.get(&bucket.id, &EmptyKey)
.await?;
let counters = counters
.map(|x| x.filtered_values(&garage.system.ring.borrow()))
.unwrap_or_default();
let (prev_cnt_obj, prev_cnt_size) = match prev_object {
Some(o) => {
let prev_cnt = o.counts().into_iter().collect::<HashMap<_, _>>();
(
prev_cnt.get(OBJECTS).cloned().unwrap_or_default(),
prev_cnt.get(BYTES).cloned().unwrap_or_default(),
)
}
None => (0, 0),
};
let cnt_obj_diff = 1 - prev_cnt_obj;
let cnt_size_diff = size as i64 - prev_cnt_size;
if let Some(mo) = quotas.max_objects {
let current_objects = counters.get(OBJECTS).cloned().unwrap_or_default();
if cnt_obj_diff > 0 && current_objects + cnt_obj_diff > mo as i64 {
return Err(Error::forbidden(format!(
"Object quota is reached, maximum objects for this bucket: {}",
mo
)));
}
}
if let Some(ms) = quotas.max_size {
let current_size = counters.get(BYTES).cloned().unwrap_or_default();
if cnt_size_diff > 0 && current_size + cnt_size_diff > ms as i64 {
return Err(Error::forbidden(format!(
"Bucket size quota is reached, maximum total size of objects for this bucket: {}. The bucket is already {} bytes, and this object would add {} bytes.",
ms, current_size, cnt_size_diff
)));
}
}
Ok(())
}
pub(crate) async fn read_and_put_blocks<S: Stream<Item = Result<Bytes, Error>> + Unpin>(
garage: &Garage,
version: &Version,
part_number: u64,
first_block: Bytes,
first_block_hash: Hash,
chunker: &mut StreamChunker<S>,
) -> Result<(u64, GenericArray<u8, typenum::U16>, Hash), Error> {
let tracer = opentelemetry::global::tracer("garage");
let md5hasher = AsyncHasher::<Md5>::new();
let sha256hasher = AsyncHasher::<Sha256>::new();
futures::future::join(
md5hasher.update(first_block.clone()),
sha256hasher.update(first_block.clone()),
)
.with_context(Context::current_with_span(
tracer.start("Hash first block (md5, sha256)"),
))
.await;
let mut next_offset = first_block.len();
let mut put_curr_version_block = put_block_meta(
garage,
version,
part_number,
0,
first_block_hash,
first_block.len() as u64,
);
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.map_err(Error::from),
put_curr_version_block.map_err(Error::from),
chunker.next(),
)?;
if let Some(block) = next_block {
let (_, _, block_hash) = futures::future::join3(
md5hasher.update(block.clone()),
sha256hasher.update(block.clone()),
async_blake2sum(block.clone()),
)
.with_context(Context::current_with_span(
tracer.start("Hash block (md5, sha256, blake2)"),
))
.await;
let block_len = block.len();
put_curr_version_block = put_block_meta(
garage,
version,
part_number,
next_offset as u64,
block_hash,
block_len as u64,
);
put_curr_block = garage.block_manager.rpc_put_block(block_hash, block);
next_offset += block_len;
} else {
break;
}
}
let total_size = next_offset as u64;
let data_md5sum = md5hasher.finalize().await;
let data_sha256sum = sha256hasher.finalize().await;
let data_sha256sum = Hash::try_from(&data_sha256sum[..]).unwrap();
Ok((total_size, data_md5sum, data_sha256sum))
}
async fn put_block_meta(
garage: &Garage,
version: &Version,
part_number: u64,
offset: u64,
hash: Hash,
size: u64,
) -> Result<(), GarageError> {
let mut version = version.clone();
version.blocks.put(
VersionBlockKey {
part_number,
offset,
},
VersionBlock { hash, size },
);
let block_ref = BlockRef {
block: hash,
version: version.uuid,
deleted: false.into(),
};
futures::try_join!(
garage.version_table.insert(&version),
garage.block_ref_table.insert(&block_ref),
)?;
Ok(())
}
pub(crate) struct StreamChunker<S: Stream<Item = Result<Bytes, Error>>> {
stream: S,
read_all: bool,
block_size: usize,
buf: BytesBuf,
}
impl<S: Stream<Item = Result<Bytes, Error>> + Unpin> StreamChunker<S> {
pub(crate) fn new(stream: S, block_size: usize) -> Self {
Self {
stream,
read_all: false,
block_size,
buf: BytesBuf::new(),
}
}
pub(crate) async fn next(&mut self) -> Result<Option<Bytes>, Error> {
while !self.read_all && self.buf.len() < self.block_size {
if let Some(block) = self.stream.next().await {
let bytes = block?;
trace!("Body next: {} bytes", bytes.len());
self.buf.extend(bytes);
} else {
self.read_all = true;
}
}
if self.buf.is_empty() {
Ok(None)
} else {
Ok(Some(self.buf.take_max(self.block_size)))
}
}
}
pub fn put_response(version_uuid: Uuid, md5sum_hex: String) -> Response<Body> {
Response::builder()
.header("x-amz-version-id", hex::encode(version_uuid))
.header("ETag", format!("\"{}\"", md5sum_hex))
.body(Body::from(vec![]))
.unwrap()
}
struct InterruptedCleanup(Option<InterruptedCleanupInner>);
struct InterruptedCleanupInner {
garage: Arc<Garage>,
bucket_id: Uuid,
key: String,
version_uuid: Uuid,
version_timestamp: u64,
}
impl InterruptedCleanup {
fn cancel(&mut self) {
drop(self.0.take());
}
}
impl Drop for InterruptedCleanup {
fn drop(&mut self) {
if let Some(info) = self.0.take() {
tokio::spawn(async move {
let object_version = ObjectVersion {
uuid: info.version_uuid,
timestamp: info.version_timestamp,
state: ObjectVersionState::Aborted,
};
let object = Object::new(info.bucket_id, info.key, vec![object_version]);
if let Err(e) = info.garage.object_table.insert(&object).await {
warn!("Cannot cleanup after aborted PutObject: {}", e);
}
});
}
}
}
// ============ helpers ============
pub(crate) fn get_mime_type(headers: &HeaderMap<HeaderValue>) -> Result<String, Error> {
Ok(headers
.get(hyper::header::CONTENT_TYPE)
.map(|x| x.to_str())
.unwrap_or(Ok("blob"))?
.to_string())
}
pub(crate) fn get_headers(headers: &HeaderMap<HeaderValue>) -> Result<ObjectVersionHeaders, Error> {
let content_type = get_mime_type(headers)?;
let mut other = BTreeMap::new();
// Preserve standard headers
let standard_header = vec![
hyper::header::CACHE_CONTROL,
hyper::header::CONTENT_DISPOSITION,
hyper::header::CONTENT_ENCODING,
hyper::header::CONTENT_LANGUAGE,
hyper::header::EXPIRES,
];
for h in standard_header.iter() {
if let Some(v) = headers.get(h) {
match v.to_str() {
Ok(v_str) => {
other.insert(h.to_string(), v_str.to_string());
}
Err(e) => {
warn!("Discarding header {}, error in .to_str(): {}", h, e);
}
}
}
}
// Preserve x-amz-meta- headers
for (k, v) in headers.iter() {
if k.as_str().starts_with("x-amz-meta-") {
match v.to_str() {
Ok(v_str) => {
other.insert(k.to_string(), v_str.to_string());
}
Err(e) => {
warn!("Discarding header {}, error in .to_str(): {}", k, e);
}
}
}
}
Ok(ObjectVersionHeaders {
content_type,
other,
})
}
pub(crate) fn next_timestamp(existing_object: Option<&Object>) -> u64 {
existing_object
.as_ref()
.and_then(|obj| obj.versions().iter().map(|v| v.timestamp).max())
.map(|t| std::cmp::max(t + 1, now_msec()))
.unwrap_or_else(now_msec)
}
