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Implement CreateBucket

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This commit is contained in:
Alex Auvolat 2022-01-05 15:56:48 +01:00
parent 9431090b1e
commit 8395030e48
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GPG key ID: EDABF9711E244EB1
5 changed files with 166 additions and 28 deletions
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21
src/api/api_server.rs
View file

@ -108,6 +108,11 @@ async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Respon
let endpoint = Endpoint::from_request(&req, bucket.map(ToOwned::to_owned))?;
// Special code path for CreateBucket API endpoint
if let Endpoint::CreateBucket { bucket } = endpoint {
return handle_create_bucket(&garage, req, content_sha256, api_key, bucket).await;
}
let bucket_name = match endpoint.get_bucket() {
None => return handle_request_without_bucket(garage, req, api_key, endpoint).await,
Some(bucket) => bucket.to_string(),
@ -188,19 +193,7 @@ async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Respon
)
.await
}
Endpoint::CreateBucket { bucket } => {
debug!(
"Body: {}",
std::str::from_utf8(&hyper::body::to_bytes(req.into_body()).await?)
.unwrap_or("<invalid utf8>")
);
let empty_body: Body = Body::from(vec![]);
let response = Response::builder()
.header("Location", format!("/{}", bucket))
.body(empty_body)
.unwrap();
Ok(response)
}
Endpoint::CreateBucket { .. } => unreachable!(),
Endpoint::HeadBucket { .. } => {
let empty_body: Body = Body::from(vec![]);
let response = Response::builder().body(empty_body).unwrap();
@ -303,7 +296,7 @@ async fn resolve_bucket(
let api_key_params = api_key
.state
.as_option()
.ok_or_else(|| Error::Forbidden("Operation is not allowed for this key.".to_string()))?;
.ok_or_internal_error("Key should not be deleted at this point")?;
if let Some(Some(bucket_id)) = api_key_params.local_aliases.get(bucket_name) {
Ok(*bucket_id)

146
src/api/s3_bucket.rs
View file

@ -1,16 +1,21 @@
use std::collections::HashMap;
use std::sync::Arc;
use hyper::{Body, Response};
use hyper::{Body, Request, Response};
use garage_model::bucket_alias_table::*;
use garage_model::bucket_table::Bucket;
use garage_model::garage::Garage;
use garage_model::key_table::Key;
use garage_model::permission::BucketKeyPerm;
use garage_table::util::EmptyKey;
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::time::*;
use crate::error::*;
use crate::s3_xml;
use crate::signature::verify_signed_content;
pub fn handle_get_bucket_location(garage: Arc<Garage>) -> Result<Response<Body>, Error> {
let loc = s3_xml::LocationConstraint {
@ -50,7 +55,7 @@ pub async fn handle_list_buckets(garage: &Garage, api_key: &Key) -> Result<Respo
.authorized_buckets
.items()
.iter()
.filter(|(_, perms)| perms.allow_read || perms.allow_write || perms.allow_owner)
.filter(|(_, perms)| perms.is_any())
.map(|(id, _)| *id)
.collect::<Vec<_>>();
@ -105,3 +110,140 @@ pub async fn handle_list_buckets(garage: &Garage, api_key: &Key) -> Result<Respo
.header("Content-Type", "application/xml")
.body(Body::from(xml))?)
}
pub async fn handle_create_bucket(
garage: &Garage,
req: Request<Body>,
content_sha256: Option<Hash>,
api_key: Key,
bucket_name: String,
) -> Result<Response<Body>, Error> {
let body = hyper::body::to_bytes(req.into_body()).await?;
verify_signed_content(content_sha256, &body[..])?;
let cmd =
parse_create_bucket_xml(&body[..]).ok_or_bad_request("Invalid create bucket XML query")?;
if let Some(location_constraint) = cmd {
if location_constraint != garage.config.s3_api.s3_region {
return Err(Error::BadRequest(format!(
"Buckets must be created in region {}",
garage.config.s3_api.s3_region
)));
}
}
let key_params = api_key
.params()
.ok_or_internal_error("Key should not be deleted at this point")?;
let existing_bucket = if let Some(Some(bucket_id)) = key_params.local_aliases.get(&bucket_name)
{
Some(*bucket_id)
} else {
garage
.bucket_helper()
.resolve_global_bucket_name(&bucket_name)
.await?
};
if let Some(bucket_id) = existing_bucket {
// Check we have write or owner permission on the bucket,
// in that case it's fine, return 200 OK, bucket exists;
// otherwise return a forbidden error.
let kp = api_key.bucket_permissions(&bucket_id);
if !(kp.allow_write || kp.allow_owner) {
return Err(Error::Forbidden(format!(
"Key {} does not have write or owner permissions on bucket {}",
api_key.key_id, bucket_name
)));
}
} else {
// Create the bucket!
if !is_valid_bucket_name(&bucket_name) {
return Err(Error::BadRequest(format!(
"{}: {}",
bucket_name, INVALID_BUCKET_NAME_MESSAGE
)));
}
let bucket = Bucket::new();
garage.bucket_table.insert(&bucket).await?;
garage
.bucket_helper()
.set_bucket_key_permissions(bucket.id, &api_key.key_id, BucketKeyPerm::ALL_PERMISSIONS)
.await?;
garage
.bucket_helper()
.set_local_bucket_alias(bucket.id, &api_key.key_id, &bucket_name)
.await?;
}
Ok(Response::builder()
.header("Location", format!("/{}", bucket_name))
.body(Body::empty())
.unwrap())
}
fn parse_create_bucket_xml(xml_bytes: &[u8]) -> Option<Option<String>> {
// Returns None if invalid data
// Returns Some(None) if no location constraint is given
// Returns Some(Some("xxxx")) where xxxx is the given location constraint
let xml_str = std::str::from_utf8(xml_bytes).ok()?;
if xml_str.trim_matches(char::is_whitespace).is_empty() {
return Some(None);
}
let xml = roxmltree::Document::parse(xml_str).ok()?;
let root = xml.root();
let cbc = root.first_child()?;
if !cbc.has_tag_name("CreateBucketConfiguration") {
return None;
}
let mut ret = None;
for item in cbc.children() {
if item.has_tag_name("LocationConstraint") {
if ret != None {
return None;
}
ret = Some(item.text()?.to_string());
} else {
return None;
}
}
Some(ret)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn create_bucket() -> Result<(), ()> {
assert_eq!(
parse_create_bucket_xml(
br#"
<CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<LocationConstraint>Europe</LocationConstraint>
</CreateBucketConfiguration >
"#
),
Some("Europe")
);
assert_eq!(
parse_create_bucket_xml(
br#"
<CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
</CreateBucketConfiguration >
"#
),
None
);
}
}

10
src/garage/admin.rs
View file

@ -531,10 +531,7 @@ impl AdminRpcHandler {
.bucket_helper()
.get_existing_matching_key(&query.key_pattern)
.await?;
key.params_mut()
.unwrap()
.allow_create_bucket
.update(true);
key.params_mut().unwrap().allow_create_bucket.update(true);
self.garage.key_table.insert(&key).await?;
self.key_info_result(key).await
}
@ -545,10 +542,7 @@ impl AdminRpcHandler {
.bucket_helper()
.get_existing_matching_key(&query.key_pattern)
.await?;
key.params_mut()
.unwrap()
.allow_create_bucket
.update(false);
key.params_mut().unwrap().allow_create_bucket.update(false);
self.garage.key_table.insert(&key).await?;
self.key_info_result(key).await
}

6
src/model/helper/bucket.rs
View file

@ -433,13 +433,11 @@ impl<'a> BucketHelper<'a> {
let mut bucket = self.get_internal_bucket(bucket_id).await?;
let mut key = self.get_internal_key(key_id).await?;
let allow_any = perm.allow_read || perm.allow_write || perm.allow_owner;
if let Some(bstate) = bucket.state.as_option() {
if let Some(kp) = bstate.authorized_keys.get(key_id) {
perm.timestamp = increment_logical_clock_2(perm.timestamp, kp.timestamp);
}
} else if allow_any {
} else if perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions on a deleted bucket".into(),
));
@ -449,7 +447,7 @@ impl<'a> BucketHelper<'a> {
if let Some(bp) = kstate.authorized_buckets.get(&bucket_id) {
perm.timestamp = increment_logical_clock_2(perm.timestamp, bp.timestamp);
}
} else if allow_any {
} else if perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions to a deleted key".into(),
));

11
src/model/permission.rs
View file

@ -27,6 +27,17 @@ impl BucketKeyPerm {
allow_write: false,
allow_owner: false,
};
pub const ALL_PERMISSIONS: Self = Self {
timestamp: 0,
allow_read: true,
allow_write: true,
allow_owner: true,
};
pub fn is_any(&self) -> bool {
self.allow_read || self.allow_write || self.allow_owner
}
}
impl Crdt for BucketKeyPerm {