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Refactor logic for setting/unsetting aliases

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Alex Auvolat 2022-01-03 17:22:40 +01:00
parent 2140cd7205
commit e59c23a69d
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5 changed files with 568 additions and 411 deletions
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474
src/garage/admin.rs
View file

@ -7,7 +7,7 @@ use serde::{Deserialize, Serialize};
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::error::{Error as GarageError, OkOrMessage};
use garage_util::error::Error as GarageError;
use garage_util::time::*;
use garage_table::replication::*;
@ -28,8 +28,6 @@ use crate::repair::Repair;
pub const ADMIN_RPC_PATH: &str = "garage/admin_rpc.rs/Rpc";
macro_rules! INVALID_BUCKET_NAME_MESSAGE { () => { "Invalid bucket name: {}. See AWS documentation for constraints on S3 bucket names:\nhttps://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html" }; }
#[derive(Debug, Serialize, Deserialize)]
pub enum AdminRpc {
BucketOperation(BucketOperation),
@ -134,47 +132,54 @@ impl AdminRpcHandler {
#[allow(clippy::ptr_arg)]
async fn handle_create_bucket(&self, name: &String) -> Result<AdminRpc, Error> {
let mut bucket = Bucket::new();
let alias = match self.garage.bucket_alias_table.get(&EmptyKey, name).await? {
Some(mut alias) => {
if !is_valid_bucket_name(name) {
return Err(Error::BadRequest(format!(
"{}: {}",
name, INVALID_BUCKET_NAME_MESSAGE
)));
}
if let Some(alias) = self.garage.bucket_alias_table.get(&EmptyKey, name).await? {
if !alias.state.get().is_deleted() {
return Err(Error::BadRequest(format!("Bucket {} already exists", name)));
}
alias.state.update(Deletable::Present(AliasParams {
bucket_id: bucket.id,
}));
alias
}
None => BucketAlias::new(name.clone(), bucket.id)
.ok_or_bad_request(format!(INVALID_BUCKET_NAME_MESSAGE!(), name))?,
};
bucket.state.as_option_mut().unwrap().aliases.merge_raw(
name,
alias.state.timestamp(),
&true,
);
// ---- done checking, now commit ----
let bucket = Bucket::new();
self.garage.bucket_table.insert(&bucket).await?;
self.garage.bucket_alias_table.insert(&alias).await?;
self.garage
.bucket_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 mut bucket_alias = self
let helper = self.garage.bucket_helper();
let bucket_id = helper
.resolve_global_bucket_name(&query.name)
.await?
.ok_or_bad_request("Bucket not found")?;
// Get the alias, but keep in minde here the bucket name
// given in parameter can also be directly the bucket's ID.
// In that case bucket_alias will be None, and
// we can still delete the bucket if it has zero aliases
// (a condition which we try to prevent but that could still happen somehow).
// We just won't try to delete an alias entry because there isn't one.
let bucket_alias = self
.garage
.bucket_alias_table
.get(&EmptyKey, &query.name)
.await?
.filter(|a| !a.is_deleted())
.ok_or_bad_request(format!("Bucket {} does not exist", query.name))?;
let bucket_id = bucket_alias.state.get().as_option().unwrap().bucket_id;
.await?;
// Check bucket doesn't have other aliases
let mut bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
.await?;
let mut bucket = helper.get_existing_bucket(bucket_id).await?;
let bucket_state = bucket.state.as_option().unwrap();
if bucket_state
.aliases
@ -216,18 +221,18 @@ impl AdminRpcHandler {
// --- done checking, now commit ---
// 1. delete authorization from keys that had access
for (key_id, _) in bucket.authorized_keys() {
if let Some(key) = self.garage.key_table.get(&EmptyKey, key_id).await? {
if !key.state.is_deleted() {
self.update_key_bucket(&key, bucket.id, false, false, false)
helper
.set_bucket_key_permissions(bucket.id, key_id, BucketKeyPerm::no_permissions())
.await?;
}
} else {
return Err(Error::BadRequest(format!("Key not found: {}", key_id)));
}
}
// 2. delete bucket alias
bucket_alias.state.update(Deletable::Deleted);
self.garage.bucket_alias_table.insert(&bucket_alias).await?;
if bucket_alias.is_some() {
helper
.unset_global_bucket_alias(bucket_id, &query.name)
.await?;
}
// 3. delete bucket
bucket.state = Deletable::delete();
self.garage.bucket_table.insert(&bucket).await?;
@ -236,125 +241,39 @@ impl AdminRpcHandler {
}
async fn handle_alias_bucket(&self, query: &AliasBucketOpt) -> Result<AdminRpc, Error> {
let bucket_id = self
.garage
.bucket_helper()
let helper = self.garage.bucket_helper();
let bucket_id = helper
.resolve_global_bucket_name(&query.existing_bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
let mut bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
if let Some(key_pattern) = &query.local {
let key = helper.get_existing_matching_key(key_pattern).await?;
helper
.set_local_bucket_alias(bucket_id, &key.key_id, &query.new_name)
.await?;
if let Some(key_local) = &query.local {
let mut key = self.get_existing_key(key_local).await?;
let mut key_param = key.state.as_option_mut().unwrap();
if let Some(Deletable::Present(existing_alias)) =
key_param.local_aliases.get(&query.new_name)
{
if *existing_alias == bucket_id {
return Ok(AdminRpc::Ok(format!(
"Alias {} already points to bucket {:?} in namespace of key {}",
query.new_name, bucket_id, key.key_id
)));
} else {
return Err(Error::BadRequest(format!("Alias {} already exists and points to different bucket: {:?} in namespace of key {}", query.new_name, existing_alias, key.key_id)));
}
}
if !is_valid_bucket_name(&query.new_name) {
return Err(Error::BadRequest(format!(
INVALID_BUCKET_NAME_MESSAGE!(),
query.new_name
)));
}
// Checks ok, add alias
let mut bucket_p = bucket.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), query.new_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(&query.new_name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
key_param.local_aliases = LwwMap::raw_item(
query.new_name.clone(),
alias_ts,
Deletable::present(bucket_id),
);
self.garage.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, true);
self.garage.bucket_table.insert(&bucket).await?;
Ok(AdminRpc::Ok(format!(
"Alias {} created to bucket {:?} in namespace of key {}",
"Alias {} now points to bucket {:?} in namespace of key {}",
query.new_name, bucket_id, key.key_id
)))
} else {
let alias = self
.garage
.bucket_alias_table
.get(&EmptyKey, &query.new_name)
helper
.set_global_bucket_alias(bucket_id, &query.new_name)
.await?;
if let Some(existing_alias) = alias.as_ref() {
if let Some(p) = existing_alias.state.get().as_option() {
if p.bucket_id == bucket_id {
return Ok(AdminRpc::Ok(format!(
"Alias {} already points to bucket {:?}",
query.new_name, bucket_id
)));
} else {
return Err(Error::BadRequest(format!(
"Alias {} already exists and points to different bucket: {:?}",
query.new_name, p.bucket_id
)));
}
}
}
// Checks ok, add alias
let mut bucket_p = bucket.state.as_option_mut().unwrap();
let alias_ts = increment_logical_clock_2(
bucket_p.aliases.get_timestamp(&query.new_name),
alias.as_ref().map(|a| a.state.timestamp()).unwrap_or(0),
);
let alias = match alias {
None => BucketAlias::new(query.new_name.clone(), bucket_id)
.ok_or_bad_request(format!(INVALID_BUCKET_NAME_MESSAGE!(), query.new_name))?,
Some(mut a) => {
a.state = Lww::raw(alias_ts, Deletable::present(AliasParams { bucket_id }));
a
}
};
self.garage.bucket_alias_table.insert(&alias).await?;
bucket_p.aliases = LwwMap::raw_item(query.new_name.clone(), alias_ts, true);
self.garage.bucket_table.insert(&bucket).await?;
Ok(AdminRpc::Ok(format!(
"Alias {} created to bucket {:?}",
"Alias {} now points to bucket {:?}",
query.new_name, bucket_id
)))
}
}
async fn handle_unalias_bucket(&self, query: &UnaliasBucketOpt) -> Result<AdminRpc, Error> {
if let Some(key_local) = &query.local {
let mut key = self.get_existing_key(key_local).await?;
let helper = self.garage.bucket_helper();
if let Some(key_pattern) = &query.local {
let key = helper.get_existing_matching_key(key_pattern).await?;
let bucket_id = key
.state
@ -365,122 +284,56 @@ impl AdminRpcHandler {
.map(|a| a.into_option())
.flatten()
.ok_or_bad_request("Bucket not found")?;
let mut bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
helper
.unset_local_bucket_alias(bucket_id, &key.key_id, &query.name)
.await?;
let mut bucket_p = bucket.state.as_option_mut().unwrap();
let has_other_aliases = bucket_p
.aliases
.items()
.iter()
.any(|(_, _, active)| *active)
|| bucket_p
.local_aliases
.items()
.iter()
.any(|((k, n), _, active)| *k == key.key_id && *n == query.name && *active);
if !has_other_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", query.name)));
}
// Checks ok, remove alias
let mut key_param = key.state.as_option_mut().unwrap();
let bucket_p_local_alias_key = (key.key_id.clone(), query.name.clone());
let alias_ts = increment_logical_clock_2(
key_param.local_aliases.get_timestamp(&query.name),
bucket_p
.local_aliases
.get_timestamp(&bucket_p_local_alias_key),
);
key_param.local_aliases =
LwwMap::raw_item(query.name.clone(), alias_ts, Deletable::delete());
self.garage.key_table.insert(&key).await?;
bucket_p.local_aliases = LwwMap::raw_item(bucket_p_local_alias_key, alias_ts, false);
self.garage.bucket_table.insert(&bucket).await?;
Ok(AdminRpc::Ok(format!(
"Bucket alias {} deleted from namespace of key {}",
query.name, key.key_id
"Alias {} no longer points to bucket {:?} in namespace of key {}",
&query.name, bucket_id, key.key_id
)))
} else {
let bucket_id = self
.garage
.bucket_helper()
let bucket_id = helper
.resolve_global_bucket_name(&query.name)
.await?
.ok_or_bad_request("Bucket not found")?;
let mut bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
helper
.unset_global_bucket_alias(bucket_id, &query.name)
.await?;
let mut bucket_state = bucket.state.as_option_mut().unwrap();
let has_other_aliases = bucket_state
.aliases
.items()
.iter()
.any(|(name, _, active)| *name != query.name && *active)
|| bucket_state
.local_aliases
.items()
.iter()
.any(|(_, _, active)| *active);
if !has_other_aliases {
return Err(Error::BadRequest(format!("Bucket {} doesn't have other aliases, please delete it instead of just unaliasing.", query.name)));
}
let mut alias = self
.garage
.bucket_alias_table
.get(&EmptyKey, &query.name)
.await?
.ok_or_message("Internal error: alias not found")?;
// Checks ok, remove alias
let alias_ts = increment_logical_clock_2(
alias.state.timestamp(),
bucket_state.aliases.get_timestamp(&query.name),
);
alias.state = Lww::raw(alias_ts, Deletable::delete());
self.garage.bucket_alias_table.insert(&alias).await?;
bucket_state.aliases = LwwMap::raw_item(query.name.clone(), alias_ts, false);
self.garage.bucket_table.insert(&bucket).await?;
Ok(AdminRpc::Ok(format!("Bucket alias {} deleted", query.name)))
Ok(AdminRpc::Ok(format!(
"Alias {} no longer points to bucket {:?}",
&query.name, bucket_id
)))
}
}
async fn handle_bucket_allow(&self, query: &PermBucketOpt) -> Result<AdminRpc, Error> {
let bucket_id = self
.garage
.bucket_helper()
let helper = self.garage.bucket_helper();
let bucket_id = helper
.resolve_global_bucket_name(&query.bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
let bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
.await?;
let key = self.get_existing_key(&query.key_pattern).await?;
let key = helper.get_existing_matching_key(&query.key_pattern).await?;
let allow_read = query.read || key.allow_read(&bucket_id);
let allow_write = query.write || key.allow_write(&bucket_id);
let allow_owner = query.owner || key.allow_owner(&bucket_id);
let new_perm = self
.update_key_bucket(&key, bucket_id, allow_read, allow_write, allow_owner)
.await?;
self.update_bucket_key(bucket, &key.key_id, new_perm)
helper
.set_bucket_key_permissions(
bucket_id,
&key.key_id,
BucketKeyPerm {
timestamp: now_msec(),
allow_read,
allow_write,
allow_owner,
},
)
.await?;
Ok(AdminRpc::Ok(format!(
@ -490,27 +343,29 @@ impl AdminRpcHandler {
}
async fn handle_bucket_deny(&self, query: &PermBucketOpt) -> Result<AdminRpc, Error> {
let bucket_id = self
.garage
.bucket_helper()
let helper = self.garage.bucket_helper();
let bucket_id = helper
.resolve_global_bucket_name(&query.bucket)
.await?
.ok_or_bad_request("Bucket not found")?;
let bucket = self
.garage
.bucket_helper()
.get_existing_bucket(bucket_id)
.await?;
let key = self.get_existing_key(&query.key_pattern).await?;
let key = helper.get_existing_matching_key(&query.key_pattern).await?;
let allow_read = !query.read && key.allow_read(&bucket_id);
let allow_write = !query.write && key.allow_write(&bucket_id);
let allow_owner = !query.owner && key.allow_owner(&bucket_id);
let new_perm = self
.update_key_bucket(&key, bucket_id, allow_read, allow_write, allow_owner)
.await?;
self.update_bucket_key(bucket, &key.key_id, new_perm)
helper
.set_bucket_key_permissions(
bucket_id,
&key.key_id,
BucketKeyPerm {
timestamp: now_msec(),
allow_read,
allow_write,
allow_owner,
},
)
.await?;
Ok(AdminRpc::Ok(format!(
@ -590,7 +445,11 @@ impl AdminRpcHandler {
}
async fn handle_key_info(&self, query: &KeyOpt) -> Result<AdminRpc, Error> {
let key = self.get_existing_key(&query.key_pattern).await?;
let key = self
.garage
.bucket_helper()
.get_existing_matching_key(&query.key_pattern)
.await?;
self.key_info_result(key).await
}
@ -601,55 +460,44 @@ impl AdminRpcHandler {
}
async fn handle_rename_key(&self, query: &KeyRenameOpt) -> Result<AdminRpc, Error> {
let mut key = self.get_existing_key(&query.key_pattern).await?;
let mut key = self
.garage
.bucket_helper()
.get_existing_matching_key(&query.key_pattern)
.await?;
key.name.update(query.new_name.clone());
self.garage.key_table.insert(&key).await?;
self.key_info_result(key).await
}
async fn handle_delete_key(&self, query: &KeyDeleteOpt) -> Result<AdminRpc, Error> {
let mut key = self.get_existing_key(&query.key_pattern).await?;
let helper = self.garage.bucket_helper();
let mut key = helper.get_existing_matching_key(&query.key_pattern).await?;
if !query.yes {
return Err(Error::BadRequest(
"Add --yes flag to really perform this operation".to_string(),
));
}
let state = key.state.as_option_mut().unwrap();
// --- done checking, now commit ---
// 1. Delete local aliases
for (alias, _, to) in state.local_aliases.items().iter() {
if let Deletable::Present(bucket_id) = to {
if let Some(mut bucket) = self.garage.bucket_table.get(bucket_id, &EmptyKey).await?
{
if let Deletable::Present(bucket_state) = &mut bucket.state {
bucket_state.local_aliases = bucket_state
.local_aliases
.update_mutator((key.key_id.to_string(), alias.to_string()), false);
self.garage.bucket_table.insert(&bucket).await?;
}
} else {
// ignore
}
helper
.unset_local_bucket_alias(*bucket_id, &key.key_id, alias)
.await?;
}
}
// 2. Delete authorized buckets
for (ab_id, auth) in state.authorized_buckets.items().iter() {
if let Some(bucket) = self.garage.bucket_table.get(ab_id, &EmptyKey).await? {
let new_perm = BucketKeyPerm {
timestamp: increment_logical_clock(auth.timestamp),
allow_read: false,
allow_write: false,
allow_owner: false,
};
if !bucket.is_deleted() {
self.update_bucket_key(bucket, &key.key_id, new_perm)
for (ab_id, _auth) in state.authorized_buckets.items().iter() {
helper
.set_bucket_key_permissions(*ab_id, &key.key_id, BucketKeyPerm::no_permissions())
.await?;
}
} else {
// ignore
}
}
// 3. Actually delete key
key.state = Deletable::delete();
self.garage.key_table.insert(&key).await?;
@ -671,30 +519,6 @@ impl AdminRpcHandler {
self.key_info_result(imported_key).await
}
async fn get_existing_key(&self, pattern: &str) -> Result<Key, Error> {
let candidates = self
.garage
.key_table
.get_range(
&EmptyKey,
None,
Some(KeyFilter::Matches(pattern.to_string())),
10,
)
.await?
.into_iter()
.filter(|k| !k.state.is_deleted())
.collect::<Vec<_>>();
if candidates.len() != 1 {
Err(Error::BadRequest(format!(
"{} matching keys",
candidates.len()
)))
} else {
Ok(candidates.into_iter().next().unwrap())
}
}
async fn key_info_result(&self, key: Key) -> Result<AdminRpc, Error> {
let mut relevant_buckets = HashMap::new();
@ -714,54 +538,6 @@ impl AdminRpcHandler {
Ok(AdminRpc::KeyInfo(key, relevant_buckets))
}
/// Update **key table** to inform of the new linked bucket
async fn update_key_bucket(
&self,
key: &Key,
bucket_id: Uuid,
allow_read: bool,
allow_write: bool,
allow_owner: bool,
) -> Result<BucketKeyPerm, Error> {
let mut key = key.clone();
let mut key_state = key.state.as_option_mut().unwrap();
let perm = key_state
.authorized_buckets
.get(&bucket_id)
.cloned()
.map(|old_perm| BucketKeyPerm {
timestamp: increment_logical_clock(old_perm.timestamp),
allow_read,
allow_write,
allow_owner,
})
.unwrap_or(BucketKeyPerm {
timestamp: now_msec(),
allow_read,
allow_write,
allow_owner,
});
key_state.authorized_buckets = Map::put_mutator(bucket_id, perm);
self.garage.key_table.insert(&key).await?;
Ok(perm)
}
/// Update **bucket table** to inform of the new linked key
async fn update_bucket_key(
&self,
mut bucket: Bucket,
key_id: &str,
new_perm: BucketKeyPerm,
) -> Result<(), Error> {
bucket.state.as_option_mut().unwrap().authorized_keys =
Map::put_mutator(key_id.to_string(), new_perm);
self.garage.bucket_table.insert(&bucket).await?;
Ok(())
}
async fn handle_migrate(self: &Arc<Self>, opt: MigrateOpt) -> Result<AdminRpc, Error> {
if !opt.yes {
return Err(Error::BadRequest(

9
src/model/bucket_alias_table.rs
View file

@ -1,7 +1,6 @@
use serde::{Deserialize, Serialize};
use garage_util::data::*;
use garage_util::time::*;
use garage_table::crdt::*;
use garage_table::*;
@ -24,10 +23,7 @@ impl AutoCrdt for AliasParams {
}
impl BucketAlias {
pub fn new(name: String, bucket_id: Uuid) -> Option<Self> {
Self::raw(name, now_msec(), bucket_id)
}
pub fn raw(name: String, ts: u64, bucket_id: Uuid) -> Option<Self> {
pub fn new(name: String, ts: u64, bucket_id: Uuid) -> Option<Self> {
if !is_valid_bucket_name(&name) {
None
} else {
@ -101,3 +97,6 @@ pub fn is_valid_bucket_name(n: &str) -> bool {
// Bucket names must not end with "-s3alias"
&& !n.ends_with("-s3alias")
}
/// Error message to return for invalid bucket names
pub const INVALID_BUCKET_NAME_MESSAGE: &str = "Invalid bucket name. See AWS documentation for constraints on S3 bucket names:\nhttps://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html";

386
src/model/helper/bucket.rs
View file

@ -1,14 +1,20 @@
use garage_table::util::EmptyKey;
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::error::{Error as GarageError, OkOrMessage};
use garage_util::time::*;
use crate::bucket_table::Bucket;
use crate::bucket_alias_table::*;
use crate::bucket_table::*;
use crate::garage::Garage;
use crate::helper::error::*;
use crate::key_table::{Key, KeyFilter};
use crate::permission::BucketKeyPerm;
pub struct BucketHelper<'a>(pub(crate) &'a Garage);
impl<'a> BucketHelper<'a> {
#[allow(clippy::ptr_arg)]
impl<'a> BucketHelper<'a> {
pub async fn resolve_global_bucket_name(
&self,
bucket_name: &String,
@ -45,12 +51,386 @@ impl<'a> BucketHelper<'a> {
}
}
/// Returns a Bucket if it is present in bucket table,
/// even if it is in deleted state. Querying a non-existing
/// bucket ID returns an internal error.
pub async fn get_internal_bucket(&self, bucket_id: Uuid) -> Result<Bucket, Error> {
Ok(self
.0
.bucket_table
.get(&bucket_id, &EmptyKey)
.await?
.ok_or_message(format!("Bucket {:?} does not exist", bucket_id))?)
}
/// Returns a Bucket if it is present in bucket table,
/// only if it is in non-deleted state.
/// Querying a non-existing bucket ID or a deleted bucket
/// returns a bad request error.
pub async fn get_existing_bucket(&self, bucket_id: Uuid) -> Result<Bucket, Error> {
self.0
.bucket_table
.get(&bucket_id, &EmptyKey)
.await?
.filter(|b| !b.is_deleted())
.ok_or_bad_request(format!("Bucket {:?} does not exist", bucket_id))
.ok_or_bad_request(format!(
"Bucket {:?} does not exist or has been deleted",
bucket_id
))
}
/// Returns a Key if it is present in key table,
/// even if it is in deleted state. Querying a non-existing
/// key ID returns an internal error.
pub async fn get_internal_key(&self, key_id: &String) -> Result<Key, Error> {
Ok(self
.0
.key_table
.get(&EmptyKey, key_id)
.await?
.ok_or_message(format!("Key {} does not exist", key_id))?)
}
/// Returns a Key if it is present in key table,
/// only if it is in non-deleted state.
/// Querying a non-existing key ID or a deleted key
/// returns a bad request error.
pub async fn get_existing_key(&self, key_id: &String) -> Result<Key, Error> {
self.0
.key_table
.get(&EmptyKey, key_id)
.await?
.filter(|b| !b.state.is_deleted())
.ok_or_bad_request(format!("Key {} does not exist or has been deleted", key_id))
}
/// Returns a Key if it is present in key table,
/// looking it up by key ID or by a match on its name,
/// only if it is in non-deleted state.
/// Querying a non-existing key ID or a deleted key
/// returns a bad request error.
pub async fn get_existing_matching_key(&self, pattern: &str) -> Result<Key, Error> {
let candidates = self
.0
.key_table
.get_range(
&EmptyKey,
None,
Some(KeyFilter::Matches(pattern.to_string())),
10,
)
.await?
.into_iter()
.filter(|k| !k.state.is_deleted())
.collect::<Vec<_>>();
if candidates.len() != 1 {
Err(Error::BadRequest(format!(
"{} matching keys",
candidates.len()
)))
} else {
Ok(candidates.into_iter().next().unwrap())
}
}
/// 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::BadRequest(format!(
"{}: {}",
alias_name, INVALID_BUCKET_NAME_MESSAGE
)));
}
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) = existing_alias.state.get().as_option() {
if p.bucket_id != bucket_id {
return Err(Error::BadRequest(format!(
"Alias {} already exists and points to different bucket: {:?}",
alias_name, p.bucket_id
)));
}
}
}
// Checks ok, add alias
let mut 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, bucket_id)
.ok_or_bad_request(format!("{}: {}", alias_name, INVALID_BUCKET_NAME_MESSAGE))?,
Some(mut a) => {
a.state = Lww::raw(alias_ts, Deletable::present(AliasParams { 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 mut 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()
.as_option()
.map(|x| x.bucket_id == 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, Deletable::delete());
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(())
}
/// 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> {
if !is_valid_bucket_name(alias_name) {
return Err(Error::BadRequest(format!(
"{}: {}",
alias_name, INVALID_BUCKET_NAME_MESSAGE
)));
}
let mut bucket = self.get_existing_bucket(bucket_id).await?;
let mut key = self.get_existing_key(key_id).await?;
let mut key_param = key.state.as_option_mut().unwrap();
if let Some(Deletable::Present(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 mut 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, Deletable::present(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 mut bucket = self.get_existing_bucket(bucket_id).await?;
let mut key = self.get_existing_key(key_id).await?;
let mut bucket_p = bucket.state.as_option_mut().unwrap();
if key
.state
.as_option()
.unwrap()
.local_aliases
.get(alias_name)
.map(|x| x.as_option())
.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 mut 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, Deletable::delete());
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 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 {
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 allow_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(())
}
}

79
src/model/migrate.rs
View file

@ -1,9 +1,8 @@
use std::sync::Arc;
use garage_table::util::EmptyKey;
use garage_util::crdt::*;
use garage_util::data::*;
use garage_util::error::*;
use garage_util::error::Error as GarageError;
use garage_util::time::*;
use garage_model_050::bucket_table as old_bucket;
@ -11,6 +10,7 @@ use garage_model_050::bucket_table as old_bucket;
use crate::bucket_alias_table::*;
use crate::bucket_table::*;
use crate::garage::Garage;
use crate::helper::error::*;
use crate::permission::*;
pub struct Migrate {
@ -19,11 +19,16 @@ pub struct Migrate {
impl Migrate {
pub async fn migrate_buckets050(&self) -> Result<(), Error> {
let tree = self.garage.db.open_tree("bucket:table")?;
let tree = self
.garage
.db
.open_tree("bucket:table")
.map_err(GarageError::from)?;
for res in tree.iter() {
let (_k, v) = res?;
let bucket = rmp_serde::decode::from_read_ref::<_, old_bucket::Bucket>(&v[..])?;
let (_k, v) = res.map_err(GarageError::from)?;
let bucket = rmp_serde::decode::from_read_ref::<_, old_bucket::Bucket>(&v[..])
.map_err(GarageError::from)?;
if let old_bucket::BucketState::Present(p) = bucket.state.get() {
self.migrate_buckets050_do_bucket(&bucket, p).await?;
@ -48,27 +53,6 @@ impl Migrate {
hex::encode(&bucket_id.as_slice()[..16])
};
let new_ak = old_bucket_p
.authorized_keys
.items()
.iter()
.map(|(k, ts, perm)| {
(
k.to_string(),
BucketKeyPerm {
timestamp: *ts,
allow_read: perm.allow_read,
allow_write: perm.allow_write,
allow_owner: false,
},
)
})
.collect::<Map<_, _>>();
let mut aliases = LwwMap::new();
aliases.update_in_place(new_name.clone(), true);
let alias_ts = aliases.get_timestamp(&new_name);
let website = if *old_bucket_p.website.get() {
Some(WebsiteConfig {
index_document: "index.html".into(),
@ -78,32 +62,39 @@ impl Migrate {
None
};
let new_bucket = Bucket {
self.garage
.bucket_table
.insert(&Bucket {
id: bucket_id,
state: Deletable::Present(BucketParams {
creation_date: now_msec(),
authorized_keys: new_ak.clone(),
authorized_keys: Map::new(),
website_config: Lww::new(website),
aliases,
aliases: LwwMap::new(),
local_aliases: LwwMap::new(),
}),
};
self.garage.bucket_table.insert(&new_bucket).await?;
})
.await?;
let new_alias = BucketAlias::raw(new_name.clone(), alias_ts, new_bucket.id).unwrap();
self.garage.bucket_alias_table.insert(&new_alias).await?;
self.garage
.bucket_helper()
.set_global_bucket_alias(bucket_id, &new_name)
.await?;
for (k, perm) in new_ak.items().iter() {
let mut key = self
.garage
.key_table
.get(&EmptyKey, k)
.await?
.ok_or_message(format!("Missing key: {}", k))?;
if let Some(p) = key.state.as_option_mut() {
p.authorized_buckets.put(new_bucket.id, *perm);
}
self.garage.key_table.insert(&key).await?;
for (k, ts, perm) in old_bucket_p.authorized_keys.items().iter() {
self.garage
.bucket_helper()
.set_bucket_key_permissions(
bucket_id,
k,
BucketKeyPerm {
timestamp: *ts,
allow_read: perm.allow_read,
allow_write: perm.allow_write,
allow_owner: false,
},
)
.await?;
}
Ok(())

11
src/model/permission.rs
View file

@ -20,6 +20,17 @@ pub struct BucketKeyPerm {
pub allow_owner: bool,
}
impl BucketKeyPerm {
pub fn no_permissions() -> Self {
Self {
timestamp: 0,
allow_read: false,
allow_write: false,
allow_owner: false,
}
}
}
impl Crdt for BucketKeyPerm {
fn merge(&mut self, other: &Self) {
match other.timestamp.cmp(&self.timestamp) {