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Add node-global lock for bucket/key operations (fix #723) #728

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lx merged 1 commit from lock-createbucket into main 2024-02-22 12:05:20 +00:00
Conversation 0 Commits 1 Files changed 12 +511 -476
12 changed files with 511 additions and 476 deletions
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63
src/api/admin/bucket.rs
View file

@ -273,6 +273,8 @@ pub async fn handle_create_bucket(
) -> Result<Response<ResBody>, Error> {
let req = parse_json_body::<CreateBucketRequest, _, Error>(req).await?;
let helper = garage.locked_helper().await;
if let Some(ga) = &req.global_alias {
if !is_valid_bucket_name(ga) {
return Err(Error::bad_request(format!(
@ -296,10 +298,7 @@ pub async fn handle_create_bucket(
)));
}
let key = garage
.key_helper()
.get_existing_key(&la.access_key_id)
.await?;
let key = helper.key().get_existing_key(&la.access_key_id).await?;
let state = key.state.as_option().unwrap();
if matches!(state.local_aliases.get(&la.alias), Some(_)) {
return Err(Error::bad_request("Local alias already exists"));
@ -310,21 +309,16 @@ pub async fn handle_create_bucket(
garage.bucket_table.insert(&bucket).await?;
if let Some(ga) = &req.global_alias {
garage
.bucket_helper()
.set_global_bucket_alias(bucket.id, ga)
.await?;
helper.set_global_bucket_alias(bucket.id, ga).await?;
}
if let Some(la) = &req.local_alias {
garage
.bucket_helper()
helper
.set_local_bucket_alias(bucket.id, &la.access_key_id, &la.alias)
.await?;
if la.allow.read || la.allow.write || la.allow.owner {
garage
.bucket_helper()
helper
.set_bucket_key_permissions(
bucket.id,
&la.access_key_id,
@ -362,15 +356,15 @@ pub async fn handle_delete_bucket(
garage: &Arc<Garage>,
id: String,
) -> Result<Response<ResBody>, Error> {
let helper = garage.bucket_helper();
let helper = garage.locked_helper().await;
let bucket_id = parse_bucket_id(&id)?;
let mut bucket = helper.get_existing_bucket(bucket_id).await?;
let mut bucket = helper.bucket().get_existing_bucket(bucket_id).await?;
let state = bucket.state.as_option().unwrap();
// Check bucket is empty
if !helper.is_bucket_empty(bucket_id).await? {
if !helper.bucket().is_bucket_empty(bucket_id).await? {
return Err(CommonError::BucketNotEmpty.into());
}
@ -476,18 +470,14 @@ pub async fn handle_bucket_change_key_perm(
) -> Result<Response<ResBody>, Error> {
let req = parse_json_body::<BucketKeyPermChangeRequest, _, Error>(req).await?;
let helper = garage.locked_helper().await;
let bucket_id = parse_bucket_id(&req.bucket_id)?;
let bucket = garage
.bucket_helper()
.get_existing_bucket(bucket_id)
.await?;
let bucket = helper.bucket().get_existing_bucket(bucket_id).await?;
let state = bucket.state.as_option().unwrap();
let key = garage
.key_helper()
.get_existing_key(&req.access_key_id)
.await?;
let key = helper.key().get_existing_key(&req.access_key_id).await?;
let mut perm = state
.authorized_keys
@ -505,8 +495,7 @@ pub async fn handle_bucket_change_key_perm(
perm.allow_owner = new_perm_flag;
}
garage
.bucket_helper()
helper
.set_bucket_key_permissions(bucket.id, &key.key_id, perm)
.await?;
@ -530,10 +519,9 @@ pub async fn handle_global_alias_bucket(
) -> Result<Response<ResBody>, Error> {
let bucket_id = parse_bucket_id(&bucket_id)?;
garage
.bucket_helper()
.set_global_bucket_alias(bucket_id, &alias)
.await?;
let helper = garage.locked_helper().await;
helper.set_global_bucket_alias(bucket_id, &alias).await?;
bucket_info_results(garage, bucket_id).await
}
@ -545,10 +533,9 @@ pub async fn handle_global_unalias_bucket(
) -> Result<Response<ResBody>, Error> {
let bucket_id = parse_bucket_id(&bucket_id)?;
garage
.bucket_helper()
.unset_global_bucket_alias(bucket_id, &alias)
.await?;
let helper = garage.locked_helper().await;
helper.unset_global_bucket_alias(bucket_id, &alias).await?;
bucket_info_results(garage, bucket_id).await
}
@ -561,8 +548,9 @@ pub async fn handle_local_alias_bucket(
) -> Result<Response<ResBody>, Error> {
let bucket_id = parse_bucket_id(&bucket_id)?;
garage
.bucket_helper()
let helper = garage.locked_helper().await;
helper
.set_local_bucket_alias(bucket_id, &access_key_id, &alias)
.await?;
@ -577,8 +565,9 @@ pub async fn handle_local_unalias_bucket(
) -> Result<Response<ResBody>, Error> {
let bucket_id = parse_bucket_id(&bucket_id)?;
garage
.bucket_helper()
let helper = garage.locked_helper().await;
helper
.unset_local_bucket_alias(bucket_id, &access_key_id, &alias)
.await?;

6
src/api/admin/key.rs
View file

@ -151,11 +151,11 @@ pub async fn handle_delete_key(
garage: &Arc<Garage>,
id: String,
) -> Result<Response<ResBody>, Error> {
let mut key = garage.key_helper().get_existing_key(&id).await?;
let helper = garage.locked_helper().await;
key.state.as_option().unwrap();
let mut key = helper.key().get_existing_key(&id).await?;
garage.key_helper().delete_key(&mut key).await?;
helper.delete_key(&mut key).await?;
Ok(Response::builder()
.status(StatusCode::NO_CONTENT)

11
src/api/s3/api_server.rs
View file

@ -148,7 +148,14 @@ impl ApiHandler for S3ApiServer {
// Special code path for CreateBucket API endpoint
if let Endpoint::CreateBucket {} = endpoint {
return handle_create_bucket(&garage, req, content_sha256, api_key, bucket_name).await;
return handle_create_bucket(
&garage,
req,
content_sha256,
&api_key.key_id,
bucket_name,
)
.await;
}
let bucket_id = garage
@ -261,7 +268,7 @@ impl ApiHandler for S3ApiServer {
Ok(response)
}
Endpoint::DeleteBucket {} => {
handle_delete_bucket(&garage, bucket_id, bucket_name, api_key).await
handle_delete_bucket(&garage, bucket_id, bucket_name, &api_key.key_id).await
}
Endpoint::GetBucketLocation {} => handle_get_bucket_location(garage),
Endpoint::GetBucketVersioning {} => handle_get_bucket_versioning(),

51
src/api/s3/bucket.rs
View file

@ -122,7 +122,7 @@ pub async fn handle_create_bucket(
garage: &Garage,
req: Request<ReqBody>,
content_sha256: Option<Hash>,
api_key: Key,
api_key_id: &String,
bucket_name: String,
) -> Result<Response<ResBody>, Error> {
let body = BodyExt::collect(req.into_body()).await?.to_bytes();
@ -144,16 +144,18 @@ pub async fn handle_create_bucket(
}
}
let key_params = api_key
.params()
.ok_or_internal_error("Key should not be deleted at this point")?;
let helper = garage.locked_helper().await;
// refetch API key after taking lock to ensure up-to-date data
let api_key = helper.key().get_existing_key(api_key_id).await?;
let key_params = api_key.params().unwrap();
let existing_bucket = if let Some(Some(bucket_id)) = key_params.local_aliases.get(&bucket_name)
{
Some(*bucket_id)
} else {
garage
.bucket_helper()
helper
.bucket()
.resolve_global_bucket_name(&bucket_name)
.await?
};
@ -187,13 +189,11 @@ pub async fn handle_create_bucket(
let bucket = Bucket::new();
garage.bucket_table.insert(&bucket).await?;
garage
.bucket_helper()
helper
.set_bucket_key_permissions(bucket.id, &api_key.key_id, BucketKeyPerm::ALL_PERMISSIONS)
.await?;
garage
.bucket_helper()
helper
.set_local_bucket_alias(bucket.id, &api_key.key_id, &bucket_name)
.await?;
}
@ -208,18 +208,16 @@ pub async fn handle_delete_bucket(
garage: &Garage,
bucket_id: Uuid,
bucket_name: String,
api_key: Key,
api_key_id: &String,
) -> Result<Response<ResBody>, Error> {
let key_params = api_key
.params()
.ok_or_internal_error("Key should not be deleted at this point")?;
let helper = garage.locked_helper().await;
let api_key = helper.key().get_existing_key(api_key_id).await?;
let key_params = api_key.params().unwrap();
let is_local_alias = matches!(key_params.local_aliases.get(&bucket_name), Some(Some(_)));
let mut bucket = garage
.bucket_helper()
.get_existing_bucket(bucket_id)
.await?;
let mut bucket = helper.bucket().get_existing_bucket(bucket_id).await?;
let bucket_state = bucket.state.as_option().unwrap();
// If the bucket has no other aliases, this is a true deletion.
@ -243,28 +241,25 @@ pub async fn handle_delete_bucket(
// Delete bucket
// Check bucket is empty
if !garage.bucket_helper().is_bucket_empty(bucket_id).await? {
if !helper.bucket().is_bucket_empty(bucket_id).await? {
return Err(CommonError::BucketNotEmpty.into());
}
// --- done checking, now commit ---
// 1. delete bucket alias
if is_local_alias {
garage
.bucket_helper()
helper
.unset_local_bucket_alias(bucket_id, &api_key.key_id, &bucket_name)
.await?;
} else {
garage
.bucket_helper()
helper
.unset_global_bucket_alias(bucket_id, &bucket_name)
.await?;
}
// 2. delete authorization from keys that had access
for (key_id, _) in bucket.authorized_keys() {
garage
.bucket_helper()
helper
.set_bucket_key_permissions(bucket.id, key_id, BucketKeyPerm::NO_PERMISSIONS)
.await?;
}
@ -274,14 +269,12 @@ pub async fn handle_delete_bucket(
garage.bucket_table.insert(&bucket).await?;
} else if is_local_alias {
// Just unalias
garage
.bucket_helper()
helper
.unset_local_bucket_alias(bucket_id, &api_key.key_id, &bucket_name)
.await?;
} else {
// Just unalias (but from global namespace)
garage
.bucket_helper()
helper
.unset_global_bucket_alias(bucket_id, &bucket_name)
.await?;
}

40
src/garage/admin/bucket.rs
View file

@ -134,6 +134,8 @@ impl AdminRpcHandler {
)));
}
let helper = self.garage.locked_helper().await;
if let Some(alias) = self.garage.bucket_alias_table.get(&EmptyKey, name).await? {
if alias.state.get().is_some() {
return Err(Error::BadRequest(format!("Bucket {} already exists", name)));
@ -145,18 +147,16 @@ impl AdminRpcHandler {
let bucket = Bucket::new();
self.garage.bucket_table.insert(&bucket).await?;
self.garage
.bucket_helper()
.set_global_bucket_alias(bucket.id, name)
.await?;
helper.set_global_bucket_alias(bucket.id, name).await?;
Ok(AdminRpc::Ok(format!("Bucket {} was created.", name)))
}
async fn handle_delete_bucket(&self, query: &DeleteBucketOpt) -> Result<AdminRpc, Error> {
let helper = self.garage.bucket_helper();
let helper = self.garage.locked_helper().await;
let bucket_id = helper
.bucket()
.resolve_global_bucket_name(&query.name)
.await?
.ok_or_bad_request("Bucket not found")?;
@ -174,7 +174,7 @@ impl AdminRpcHandler {
.await?;
// Check bucket doesn't have other aliases
let mut bucket = helper.get_existing_bucket(bucket_id).await?;
let mut bucket = helper.bucket().get_existing_bucket(bucket_id).await?;
let bucket_state = bucket.state.as_option().unwrap();
if bucket_state
.aliases
@ -195,7 +195,7 @@ impl AdminRpcHandler {
}
// Check bucket is empty
if !helper.is_bucket_empty(bucket_id).await? {
if !helper.bucket().is_bucket_empty(bucket_id).await? {
return Err(Error::BadRequest(format!(
"Bucket {} is not empty",
query.name
@ -231,16 +231,16 @@ impl AdminRpcHandler {
}
async fn handle_alias_bucket(&self, query: &AliasBucketOpt) -> Result<AdminRpc, Error> {
let helper = self.garage.bucket_helper();
let key_helper = self.garage.key_helper();
let helper = self.garage.locked_helper().await;
let bucket_id = helper
.bucket()
.resolve_global_bucket_name(&query.existing_bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
if let Some(key_pattern) = &query.local {
let key = key_helper.get_existing_matching_key(key_pattern).await?;
let key = helper.key().get_existing_matching_key(key_pattern).await?;
helper
.set_local_bucket_alias(bucket_id, &key.key_id, &query.new_name)
@ -261,11 +261,10 @@ impl AdminRpcHandler {
}
async fn handle_unalias_bucket(&self, query: &UnaliasBucketOpt) -> Result<AdminRpc, Error> {
let helper = self.garage.bucket_helper();
let key_helper = self.garage.key_helper();
let helper = self.garage.locked_helper().await;
if let Some(key_pattern) = &query.local {
let key = key_helper.get_existing_matching_key(key_pattern).await?;
let key = helper.key().get_existing_matching_key(key_pattern).await?;
let bucket_id = key
.state
@ -287,6 +286,7 @@ impl AdminRpcHandler {
)))
} else {
let bucket_id = helper
.bucket()
.resolve_global_bucket_name(&query.name)
.await?
.ok_or_bad_request("Bucket not found")?;
@ -303,14 +303,15 @@ impl AdminRpcHandler {
}
async fn handle_bucket_allow(&self, query: &PermBucketOpt) -> Result<AdminRpc, Error> {
let helper = self.garage.bucket_helper();
let key_helper = self.garage.key_helper();
let helper = self.garage.locked_helper().await;
let bucket_id = helper
.bucket()
.resolve_global_bucket_name(&query.bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
let key = key_helper
let key = helper
.key()
.get_existing_matching_key(&query.key_pattern)
.await?;
@ -338,14 +339,15 @@ impl AdminRpcHandler {
}
async fn handle_bucket_deny(&self, query: &PermBucketOpt) -> Result<AdminRpc, Error> {
let helper = self.garage.bucket_helper();
let key_helper = self.garage.key_helper();
let helper = self.garage.locked_helper().await;
let bucket_id = helper
.bucket()
.resolve_global_bucket_name(&query.bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
let key = key_helper
let key = helper
.key()
.get_existing_matching_key(&query.key_pattern)
.await?;

7
src/garage/admin/key.rs
View file

@ -76,9 +76,10 @@ impl AdminRpcHandler {
}
async fn handle_delete_key(&self, query: &KeyDeleteOpt) -> Result<AdminRpc, Error> {
let key_helper = self.garage.key_helper();
let helper = self.garage.locked_helper().await;
let mut key = key_helper
let mut key = helper
.key()
.get_existing_matching_key(&query.key_pattern)
.await?;
@ -88,7 +89,7 @@ impl AdminRpcHandler {
));
}
key_helper.delete_key(&mut key).await?;
helper.delete_key(&mut key).await?;
Ok(AdminRpc::Ok(format!(
"Key {} was deleted successfully.",

9
src/model/garage.rs
View file

@ -56,6 +56,9 @@ pub struct Garage {
/// Table containing api keys
pub key_table: Arc<Table<KeyTable, TableFullReplication>>,
/// Lock to prevent concurrent modification of buckets and access keys
bucket_lock: tokio::sync::Mutex<()>,
/// Table containing S3 objects
pub object_table: Arc<Table<ObjectTable, TableShardedReplication>>,
/// Counting table containing object counters
@ -343,6 +346,7 @@ impl Garage {
bucket_table,
bucket_alias_table,
key_table,
bucket_lock: tokio::sync::Mutex::new(()),
object_table,
object_counter_table,
mpu_table,
@ -385,6 +389,11 @@ impl Garage {
pub fn key_helper(&self) -> helper::key::KeyHelper {
helper::key::KeyHelper(self)
}
pub async fn locked_helper(&self) -> helper::locked::LockedHelper {
let lock = self.bucket_lock.lock().await;
helper::locked::LockedHelper(self, lock)
}
}
#[cfg(feature = "k2v")]

342
src/model/helper/bucket.rs
View file

@ -1,19 +1,15 @@
use std::time::Duration;
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::error::{Error as GarageError, OkOrMessage};
use garage_util::error::OkOrMessage;
use garage_util::time::*;
use garage_table::util::*;
use crate::bucket_alias_table::*;
use crate::bucket_table::*;
use crate::garage::Garage;
use crate::helper::error::*;
use crate::helper::key::KeyHelper;
use crate::key_table::*;
use crate::permission::BucketKeyPerm;
use crate::s3::object_table::*;
pub struct BucketHelper<'a>(pub(crate) &'a Garage);
@ -96,341 +92,7 @@ impl<'a> BucketHelper<'a> {
.ok_or_else(|| Error::NoSuchBucket(hex::encode(bucket_id)))
}
/// Sets a new alias for a bucket in global namespace.
/// This function fails if:
/// - alias name is not valid according to S3 spec
/// - bucket does not exist or is deleted
/// - alias already exists and points to another bucket
pub async fn set_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
if !is_valid_bucket_name(alias_name) {
return Err(Error::InvalidBucketName(alias_name.to_string()));
}
let mut bucket = self.get_existing_bucket(bucket_id).await?;
let alias = self.0.bucket_alias_table.get(&EmptyKey, alias_name).await?;
if let Some(existing_alias) = alias.as_ref() {
if let Some(p_bucket) = existing_alias.state.get() {
if *p_bucket != bucket_id {
return Err(Error::BadRequest(format!(
"Alias {} already exists and points to different bucket: {:?}",
alias_name, p_bucket
)));
}
}
}
// Checks ok, add alias
let bucket_p = bucket.state.as_option_mut().unwrap();
let alias_ts = increment_logical_clock_2(
bucket_p.aliases.get_timestamp(alias_name),
alias.as_ref().map(|a| a.state.timestamp()).unwrap_or(0),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
let alias = match alias {
None => BucketAlias::new(alias_name.clone(), alias_ts, Some(bucket_id))
.ok_or_else(|| Error::InvalidBucketName(alias_name.clone()))?,
Some(mut a) => {
a.state = Lww::raw(alias_ts, Some(bucket_id));
a
}
};
self.0.bucket_alias_table.insert(&alias).await?;
bucket_p.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, true);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Unsets an alias for a bucket in global namespace.
/// This function fails if:
/// - bucket does not exist or is deleted
/// - alias does not exist or maps to another bucket (-> internal error)
/// - bucket has no other aliases (global or local)
pub async fn unset_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
let mut bucket = self.get_existing_bucket(bucket_id).await?;
let bucket_state = bucket.state.as_option_mut().unwrap();
let mut alias = self
.0
.bucket_alias_table
.get(&EmptyKey, alias_name)
.await?
.filter(|a| a.state.get().map(|x| x == bucket_id).unwrap_or(false))
.ok_or_message(format!(
"Internal error: alias not found or does not point to bucket {:?}",
bucket_id
))?;
let has_other_global_aliases = bucket_state
.aliases
.items()
.iter()
.any(|(name, _, active)| name != alias_name && *active);
let has_other_local_aliases = bucket_state
.local_aliases
.items()
.iter()
.any(|(_, _, active)| *active);
if !has_other_global_aliases && !has_other_local_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", alias_name)));
}
// Checks ok, remove alias
let alias_ts = increment_logical_clock_2(
alias.state.timestamp(),
bucket_state.aliases.get_timestamp(alias_name),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
alias.state = Lww::raw(alias_ts, None);
self.0.bucket_alias_table.insert(&alias).await?;
bucket_state.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Ensures a bucket does not have a certain global alias.
/// Contrarily to unset_global_bucket_alias, this does not
/// fail on any condition other than:
/// - bucket cannot be found (its fine if it is in deleted state)
/// - alias cannot be found (its fine if it points to nothing or
/// to another bucket)
pub async fn purge_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
let mut bucket = self.get_internal_bucket(bucket_id).await?;
let mut alias = self
.0
.bucket_alias_table
.get(&EmptyKey, alias_name)
.await?
.ok_or_else(|| Error::NoSuchBucket(alias_name.to_string()))?;
// Checks ok, remove alias
let alias_ts = match bucket.state.as_option() {
Some(bucket_state) => increment_logical_clock_2(
alias.state.timestamp(),
bucket_state.aliases.get_timestamp(alias_name),
),
None => increment_logical_clock(alias.state.timestamp()),
};
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
if alias.state.get() == &Some(bucket_id) {
alias.state = Lww::raw(alias_ts, None);
self.0.bucket_alias_table.insert(&alias).await?;
}
if let Some(bucket_state) = bucket.state.as_option_mut() {
bucket_state.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
}
Ok(())
}
/// Sets a new alias for a bucket in the local namespace of a key.
/// This function fails if:
/// - alias name is not valid according to S3 spec
/// - bucket does not exist or is deleted
/// - key does not exist or is deleted
/// - alias already exists and points to another bucket
pub async fn set_local_bucket_alias(
&self,
bucket_id: Uuid,
key_id: &String,
alias_name: &String,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
if !is_valid_bucket_name(alias_name) {
return Err(Error::InvalidBucketName(alias_name.to_string()));
}
let mut bucket = self.get_existing_bucket(bucket_id).await?;
let mut key = key_helper.get_existing_key(key_id).await?;
let key_param = key.state.as_option_mut().unwrap();
if let Some(Some(existing_alias)) = key_param.local_aliases.get(alias_name) {
if *existing_alias != bucket_id {
return Err(Error::BadRequest(format!("Alias {} already exists in namespace of key {} and points to different bucket: {:?}", alias_name, key.key_id, existing_alias)));
}
}
// Checks ok, add alias
let bucket_p = bucket.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), alias_name.clone());
// Calculate the timestamp to assign to this aliasing in the two local_aliases maps
// (the one from key to bucket, and the reverse one stored in the bucket iself)
// so that merges on both maps in case of a concurrent operation resolve
// to the same alias being set
let alias_ts = increment_logical_clock_2(
key_param.local_aliases.get_timestamp(alias_name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
key_param.local_aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, Some(bucket_id));
self.0.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, true);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Unsets an alias for a bucket in the local namespace of a key.
/// This function fails if:
/// - bucket does not exist or is deleted
/// - key does not exist or is deleted
/// - alias does not exist or maps to another bucket (-> internal error)
/// - bucket has no other aliases (global or local)
pub async fn unset_local_bucket_alias(
&self,
bucket_id: Uuid,
key_id: &String,
alias_name: &String,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
let mut bucket = self.get_existing_bucket(bucket_id).await?;
let mut key = key_helper.get_existing_key(key_id).await?;
let bucket_p = bucket.state.as_option_mut().unwrap();
if key
.state
.as_option()
.unwrap()
.local_aliases
.get(alias_name)
.cloned()
.flatten() != Some(bucket_id)
{
return Err(GarageError::Message(format!(
"Bucket {:?} does not have alias {} in namespace of key {}",
bucket_id, alias_name, key_id
))
.into());
}
let has_other_global_aliases = bucket_p
.aliases
.items()
.iter()
.any(|(_, _, active)| *active);
let has_other_local_aliases = bucket_p
.local_aliases
.items()
.iter()
.any(|((k, n), _, active)| *k == key.key_id && n == alias_name && *active);
if !has_other_global_aliases && !has_other_local_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", alias_name)));
}
// Checks ok, remove alias
let key_param = key.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), alias_name.clone());
let alias_ts = increment_logical_clock_2(
key_param.local_aliases.get_timestamp(alias_name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
key_param.local_aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, None);
self.0.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Sets permissions for a key on a bucket.
/// This function fails if:
/// - bucket or key cannot be found at all (its ok if they are in deleted state)
/// - bucket or key is in deleted state and we are trying to set permissions other than "deny
/// all"
pub async fn set_bucket_key_permissions(
&self,
bucket_id: Uuid,
key_id: &String,
mut perm: BucketKeyPerm,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
let mut bucket = self.get_internal_bucket(bucket_id).await?;
let mut key = key_helper.get_internal_key(key_id).await?;
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 perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions on a deleted bucket".into(),
));
}
if let Some(kstate) = key.state.as_option() {
if let Some(bp) = kstate.authorized_buckets.get(&bucket_id) {
perm.timestamp = increment_logical_clock_2(perm.timestamp, bp.timestamp);
}
} else if perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions to a deleted key".into(),
));
}
// ---- timestamp-ensured causality barrier ----
if let Some(bstate) = bucket.state.as_option_mut() {
bstate.authorized_keys = Map::put_mutator(key_id.clone(), perm);
self.0.bucket_table.insert(&bucket).await?;
}
if let Some(kstate) = key.state.as_option_mut() {
kstate.authorized_buckets = Map::put_mutator(bucket_id, perm);
self.0.key_table.insert(&key).await?;
}
Ok(())
}
// ----
pub async fn is_bucket_empty(&self, bucket_id: Uuid) -> Result<bool, Error> {
let objects = self

37
src/model/helper/key.rs
View file

@ -1,12 +1,9 @@
use garage_table::util::*;
use garage_util::crdt::*;
use garage_util::error::OkOrMessage;
use crate::garage::Garage;
use crate::helper::bucket::BucketHelper;
use crate::helper::error::*;
use crate::key_table::{Key, KeyFilter};
use crate::permission::BucketKeyPerm;
pub struct KeyHelper<'a>(pub(crate) &'a Garage);
@ -65,38 +62,4 @@ impl<'a> KeyHelper<'a> {
Ok(candidates.into_iter().next().unwrap())
}
}
/// Deletes an API access key
pub async fn delete_key(&self, key: &mut Key) -> Result<(), Error> {
let bucket_helper = BucketHelper(self.0);
let state = key.state.as_option_mut().unwrap();
// --- done checking, now commit ---
// (the step at unset_local_bucket_alias will fail if a bucket
// does not have another alias, the deletion will be
// interrupted in the middle if that happens)
// 1. Delete local aliases
for (alias, _, to) in state.local_aliases.items().iter() {
if let Some(bucket_id) = to {
bucket_helper
.unset_local_bucket_alias(*bucket_id, &key.key_id, alias)
.await?;
}
}
// 2. Remove permissions on all authorized buckets
for (ab_id, _auth) in state.authorized_buckets.items().iter() {
bucket_helper
.set_bucket_key_permissions(*ab_id, &key.key_id, BucketKeyPerm::NO_PERMISSIONS)
.await?;
}
// 3. Actually delete key
key.state = Deletable::delete();
self.0.key_table.insert(key).await?;
Ok(())
}
}

410
src/model/helper/locked.rs Normal file
View file

@ -0,0 +1,410 @@
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::error::{Error as GarageError, OkOrMessage};
use garage_util::time::*;
use garage_table::util::*;
use crate::bucket_alias_table::*;
use crate::garage::Garage;
use crate::helper::bucket::BucketHelper;
use crate::helper::error::*;
use crate::helper::key::KeyHelper;
use crate::key_table::*;
use crate::permission::BucketKeyPerm;
/// A LockedHelper is the mandatory struct to hold when doing operations
/// that modify access keys or bucket aliases. This structure takes
/// a lock to a unit value that is in the globally-shared Garage struct.
///
/// This avoid several concurrent requests to modify the list of buckets
/// and aliases at the same time, ending up in inconsistent states.
/// This DOES NOT FIX THE FUNDAMENTAL ISSUE as CreateBucket requests handled
/// by different API nodes can still break the cluster, but it is a first
/// fix that allows consistency to be maintained if all such requests are
/// directed to a single node, which is doable for many deployments.
///
/// See issues: #649, #723
pub struct LockedHelper<'a>(
pub(crate) &'a Garage,
pub(crate) tokio::sync::MutexGuard<'a, ()>,
);
#[allow(clippy::ptr_arg)]
impl<'a> LockedHelper<'a> {
pub fn bucket(&self) -> BucketHelper<'a> {
BucketHelper(self.0)
}
pub fn key(&self) -> KeyHelper<'a> {
KeyHelper(self.0)
}
/// Sets a new alias for a bucket in global namespace.
/// This function fails if:
/// - alias name is not valid according to S3 spec
/// - bucket does not exist or is deleted
/// - alias already exists and points to another bucket
pub async fn set_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
if !is_valid_bucket_name(alias_name) {
return Err(Error::InvalidBucketName(alias_name.to_string()));
}
let mut bucket = self.bucket().get_existing_bucket(bucket_id).await?;
let alias = self.0.bucket_alias_table.get(&EmptyKey, alias_name).await?;
if let Some(existing_alias) = alias.as_ref() {
if let Some(p_bucket) = existing_alias.state.get() {
if *p_bucket != bucket_id {
return Err(Error::BadRequest(format!(
"Alias {} already exists and points to different bucket: {:?}",
alias_name, p_bucket
)));
}
}
}
// Checks ok, add alias
let bucket_p = bucket.state.as_option_mut().unwrap();
let alias_ts = increment_logical_clock_2(
bucket_p.aliases.get_timestamp(alias_name),
alias.as_ref().map(|a| a.state.timestamp()).unwrap_or(0),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
let alias = match alias {
None => BucketAlias::new(alias_name.clone(), alias_ts, Some(bucket_id))
.ok_or_else(|| Error::InvalidBucketName(alias_name.clone()))?,
Some(mut a) => {
a.state = Lww::raw(alias_ts, Some(bucket_id));
a
}
};
self.0.bucket_alias_table.insert(&alias).await?;
bucket_p.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, true);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Unsets an alias for a bucket in global namespace.
/// This function fails if:
/// - bucket does not exist or is deleted
/// - alias does not exist or maps to another bucket (-> internal error)
/// - bucket has no other aliases (global or local)
pub async fn unset_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
let mut bucket = self.bucket().get_existing_bucket(bucket_id).await?;
let bucket_state = bucket.state.as_option_mut().unwrap();
let mut alias = self
.0
.bucket_alias_table
.get(&EmptyKey, alias_name)
.await?
.filter(|a| a.state.get().map(|x| x == bucket_id).unwrap_or(false))
.ok_or_message(format!(
"Internal error: alias not found or does not point to bucket {:?}",
bucket_id
))?;
let has_other_global_aliases = bucket_state
.aliases
.items()
.iter()
.any(|(name, _, active)| name != alias_name && *active);
let has_other_local_aliases = bucket_state
.local_aliases
.items()
.iter()
.any(|(_, _, active)| *active);
if !has_other_global_aliases && !has_other_local_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", alias_name)));
}
// Checks ok, remove alias
let alias_ts = increment_logical_clock_2(
alias.state.timestamp(),
bucket_state.aliases.get_timestamp(alias_name),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
alias.state = Lww::raw(alias_ts, None);
self.0.bucket_alias_table.insert(&alias).await?;
bucket_state.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Ensures a bucket does not have a certain global alias.
/// Contrarily to unset_global_bucket_alias, this does not
/// fail on any condition other than:
/// - bucket cannot be found (its fine if it is in deleted state)
/// - alias cannot be found (its fine if it points to nothing or
/// to another bucket)
pub async fn purge_global_bucket_alias(
&self,
bucket_id: Uuid,
alias_name: &String,
) -> Result<(), Error> {
let mut bucket = self.bucket().get_internal_bucket(bucket_id).await?;
let mut alias = self
.0
.bucket_alias_table
.get(&EmptyKey, alias_name)
.await?
.ok_or_else(|| Error::NoSuchBucket(alias_name.to_string()))?;
// Checks ok, remove alias
let alias_ts = match bucket.state.as_option() {
Some(bucket_state) => increment_logical_clock_2(
alias.state.timestamp(),
bucket_state.aliases.get_timestamp(alias_name),
),
None => increment_logical_clock(alias.state.timestamp()),
};
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
if alias.state.get() == &Some(bucket_id) {
alias.state = Lww::raw(alias_ts, None);
self.0.bucket_alias_table.insert(&alias).await?;
}
if let Some(bucket_state) = bucket.state.as_option_mut() {
bucket_state.aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
}
Ok(())
}
/// Sets a new alias for a bucket in the local namespace of a key.
/// This function fails if:
/// - alias name is not valid according to S3 spec
/// - bucket does not exist or is deleted
/// - key does not exist or is deleted
/// - alias already exists and points to another bucket
pub async fn set_local_bucket_alias(
&self,
bucket_id: Uuid,
key_id: &String,
alias_name: &String,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
if !is_valid_bucket_name(alias_name) {
return Err(Error::InvalidBucketName(alias_name.to_string()));
}
let mut bucket = self.bucket().get_existing_bucket(bucket_id).await?;
let mut key = key_helper.get_existing_key(key_id).await?;
let key_param = key.state.as_option_mut().unwrap();
if let Some(Some(existing_alias)) = key_param.local_aliases.get(alias_name) {
if *existing_alias != bucket_id {
return Err(Error::BadRequest(format!("Alias {} already exists in namespace of key {} and points to different bucket: {:?}", alias_name, key.key_id, existing_alias)));
}
}
// Checks ok, add alias
let bucket_p = bucket.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), alias_name.clone());
// Calculate the timestamp to assign to this aliasing in the two local_aliases maps
// (the one from key to bucket, and the reverse one stored in the bucket iself)
// so that merges on both maps in case of a concurrent operation resolve
// to the same alias being set
let alias_ts = increment_logical_clock_2(
key_param.local_aliases.get_timestamp(alias_name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
key_param.local_aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, Some(bucket_id));
self.0.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, true);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Unsets an alias for a bucket in the local namespace of a key.
/// This function fails if:
/// - bucket does not exist or is deleted
/// - key does not exist or is deleted
/// - alias does not exist or maps to another bucket (-> internal error)
/// - bucket has no other aliases (global or local)
pub async fn unset_local_bucket_alias(
&self,
bucket_id: Uuid,
key_id: &String,
alias_name: &String,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
let mut bucket = self.bucket().get_existing_bucket(bucket_id).await?;
let mut key = key_helper.get_existing_key(key_id).await?;
let bucket_p = bucket.state.as_option_mut().unwrap();
if key
.state
.as_option()
.unwrap()
.local_aliases
.get(alias_name)
.cloned()
.flatten() != Some(bucket_id)
{
return Err(GarageError::Message(format!(
"Bucket {:?} does not have alias {} in namespace of key {}",
bucket_id, alias_name, key_id
))
.into());
}
let has_other_global_aliases = bucket_p
.aliases
.items()
.iter()
.any(|(_, _, active)| *active);
let has_other_local_aliases = bucket_p
.local_aliases
.items()
.iter()
.any(|((k, n), _, active)| *k == key.key_id && n == alias_name && *active);
if !has_other_global_aliases && !has_other_local_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", alias_name)));
}
// Checks ok, remove alias
let key_param = key.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), alias_name.clone());
let alias_ts = increment_logical_clock_2(
key_param.local_aliases.get_timestamp(alias_name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
// ---- timestamp-ensured causality barrier ----
// writes are now done and all writes use timestamp alias_ts
key_param.local_aliases = LwwMap::raw_item(alias_name.clone(), alias_ts, None);
self.0.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, false);
self.0.bucket_table.insert(&bucket).await?;
Ok(())
}
/// Sets permissions for a key on a bucket.
/// This function fails if:
/// - bucket or key cannot be found at all (its ok if they are in deleted state)
/// - bucket or key is in deleted state and we are trying to set permissions other than "deny
/// all"
pub async fn set_bucket_key_permissions(
&self,
bucket_id: Uuid,
key_id: &String,
mut perm: BucketKeyPerm,
) -> Result<(), Error> {
let key_helper = KeyHelper(self.0);
let mut bucket = self.bucket().get_internal_bucket(bucket_id).await?;
let mut key = key_helper.get_internal_key(key_id).await?;
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 perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions on a deleted bucket".into(),
));
}
if let Some(kstate) = key.state.as_option() {
if let Some(bp) = kstate.authorized_buckets.get(&bucket_id) {
perm.timestamp = increment_logical_clock_2(perm.timestamp, bp.timestamp);
}
} else if perm.is_any() {
return Err(Error::BadRequest(
"Trying to give permissions to a deleted key".into(),
));
}
// ---- timestamp-ensured causality barrier ----
if let Some(bstate) = bucket.state.as_option_mut() {
bstate.authorized_keys = Map::put_mutator(key_id.clone(), perm);
self.0.bucket_table.insert(&bucket).await?;
}
if let Some(kstate) = key.state.as_option_mut() {
kstate.authorized_buckets = Map::put_mutator(bucket_id, perm);
self.0.key_table.insert(&key).await?;
}
Ok(())
}
// ----
/// Deletes an API access key
pub async fn delete_key(&self, key: &mut Key) -> Result<(), Error> {
let state = key.state.as_option_mut().unwrap();
// --- done checking, now commit ---
// (the step at unset_local_bucket_alias will fail if a bucket
// does not have another alias, the deletion will be
// interrupted in the middle if that happens)
// 1. Delete local aliases
for (alias, _, to) in state.local_aliases.items().iter() {
if let Some(bucket_id) = to {
self.unset_local_bucket_alias(*bucket_id, &key.key_id, alias)
.await?;
}
}
// 2. Remove permissions on all authorized buckets
for (ab_id, _auth) in state.authorized_buckets.items().iter() {
self.set_bucket_key_permissions(*ab_id, &key.key_id, BucketKeyPerm::NO_PERMISSIONS)
.await?;
}
// 3. Actually delete key
key.state = Deletable::delete();
self.0.key_table.insert(key).await?;
Ok(())
}
}

1
src/model/helper/mod.rs
View file

@ -1,3 +1,4 @@
pub mod bucket;
pub mod error;
pub mod key;
pub mod locked;

10
src/model/migrate.rs
View file

@ -67,6 +67,8 @@ impl Migrate {
None
};
let helper = self.garage.locked_helper().await;
self.garage
.bucket_table
.insert(&Bucket {
@ -84,14 +86,10 @@ impl Migrate {
})
.await?;
self.garage
.bucket_helper()
.set_global_bucket_alias(bucket_id, &new_name)
.await?;
helper.set_global_bucket_alias(bucket_id, &new_name).await?;
for (k, ts, perm) in old_bucket_p.authorized_keys.items().iter() {
self.garage
.bucket_helper()
helper
.set_bucket_key_permissions(
bucket_id,
k,