diff --git a/pageserver/src/import_datadir.rs b/pageserver/src/import_datadir.rs index 9ad0124a80..5bff5337bd 100644 --- a/pageserver/src/import_datadir.rs +++ b/pageserver/src/import_datadir.rs @@ -148,17 +148,17 @@ async fn import_rel( // because there is no guarantee about the order in which we are processing segments. // ignore "relation already exists" error // - // FIXME: use proper error type for this, instead of parsing the error message. - // Or better yet, keep track of which relations we've already created + // FIXME: Keep track of which relations we've already created? // https://github.com/neondatabase/neon/issues/3309 if let Err(e) = modification .put_rel_creation(rel, nblocks as u32, ctx) .await { - if e.to_string().contains("already exists") { - debug!("relation {} already exists. we must be extending it", rel); - } else { - return Err(e); + match e { + RelationError::AlreadyExists => { + debug!("Relation {} already exist. We must be extending it.", rel) + } + _ => return Err(e.into()), } } diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index 86c84ec82f..998c199ba6 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -43,6 +43,16 @@ pub enum CalculateLogicalSizeError { Other(#[from] anyhow::Error), } +#[derive(Debug, thiserror::Error)] +pub enum RelationError { + #[error("Relation Already Exists")] + AlreadyExists, + #[error("invalid relnode")] + InvalidRelnode, + #[error(transparent)] + Other(#[from] anyhow::Error), +} + /// /// This impl provides all the functionality to store PostgreSQL relations, SLRUs, /// and other special kinds of files, in a versioned key-value store. The @@ -101,9 +111,9 @@ impl Timeline { ctx: &RequestContext, ) -> Result { if tag.relnode == 0 { - return Err(PageReconstructError::Other(anyhow::anyhow!( - "invalid relnode" - ))); + return Err(PageReconstructError::Other( + RelationError::InvalidRelnode.into(), + )); } let nblocks = self.get_rel_size(tag, lsn, latest, ctx).await?; @@ -148,9 +158,9 @@ impl Timeline { ctx: &RequestContext, ) -> Result { if tag.relnode == 0 { - return Err(PageReconstructError::Other(anyhow::anyhow!( - "invalid relnode" - ))); + return Err(PageReconstructError::Other( + RelationError::InvalidRelnode.into(), + )); } if let Some(nblocks) = self.get_cached_rel_size(&tag, lsn) { @@ -193,9 +203,9 @@ impl Timeline { ctx: &RequestContext, ) -> Result { if tag.relnode == 0 { - return Err(PageReconstructError::Other(anyhow::anyhow!( - "invalid relnode" - ))); + return Err(PageReconstructError::Other( + RelationError::InvalidRelnode.into(), + )); } // first try to lookup relation in cache @@ -724,7 +734,7 @@ impl<'a> DatadirModification<'a> { blknum: BlockNumber, rec: NeonWalRecord, ) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + anyhow::ensure!(rel.relnode != 0, RelationError::InvalidRelnode); self.put(rel_block_to_key(rel, blknum), Value::WalRecord(rec)); Ok(()) } @@ -751,7 +761,7 @@ impl<'a> DatadirModification<'a> { blknum: BlockNumber, img: Bytes, ) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + anyhow::ensure!(rel.relnode != 0, RelationError::InvalidRelnode); self.put(rel_block_to_key(rel, blknum), Value::Image(img)); Ok(()) } @@ -875,32 +885,38 @@ impl<'a> DatadirModification<'a> { rel: RelTag, nblocks: BlockNumber, ctx: &RequestContext, - ) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + ) -> Result<(), RelationError> { + if rel.relnode == 0 { + return Err(RelationError::AlreadyExists); + } // It's possible that this is the first rel for this db in this // tablespace. Create the reldir entry for it if so. - let mut dbdir = DbDirectory::des(&self.get(DBDIR_KEY, ctx).await?)?; + let mut dbdir = DbDirectory::des(&self.get(DBDIR_KEY, ctx).await.context("read db")?) + .context("deserialize db")?; let rel_dir_key = rel_dir_to_key(rel.spcnode, rel.dbnode); let mut rel_dir = if dbdir.dbdirs.get(&(rel.spcnode, rel.dbnode)).is_none() { // Didn't exist. Update dbdir dbdir.dbdirs.insert((rel.spcnode, rel.dbnode), false); - let buf = DbDirectory::ser(&dbdir)?; + let buf = DbDirectory::ser(&dbdir).context("serialize db")?; self.put(DBDIR_KEY, Value::Image(buf.into())); // and create the RelDirectory RelDirectory::default() } else { // reldir already exists, fetch it - RelDirectory::des(&self.get(rel_dir_key, ctx).await?)? + RelDirectory::des(&self.get(rel_dir_key, ctx).await.context("read db")?) + .context("deserialize db")? }; // Add the new relation to the rel directory entry, and write it back if !rel_dir.rels.insert((rel.relnode, rel.forknum)) { - anyhow::bail!("rel {rel} already exists"); + return Err(RelationError::AlreadyExists); } self.put( rel_dir_key, - Value::Image(Bytes::from(RelDirectory::ser(&rel_dir)?)), + Value::Image(Bytes::from( + RelDirectory::ser(&rel_dir).context("serialize")?, + )), ); // Put size @@ -925,7 +941,7 @@ impl<'a> DatadirModification<'a> { nblocks: BlockNumber, ctx: &RequestContext, ) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + anyhow::ensure!(rel.relnode != 0, RelationError::InvalidRelnode); let last_lsn = self.tline.get_last_record_lsn(); if self.tline.get_rel_exists(rel, last_lsn, true, ctx).await? { let size_key = rel_size_to_key(rel); @@ -956,7 +972,7 @@ impl<'a> DatadirModification<'a> { nblocks: BlockNumber, ctx: &RequestContext, ) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + anyhow::ensure!(rel.relnode != 0, RelationError::InvalidRelnode); // Put size let size_key = rel_size_to_key(rel); @@ -977,7 +993,7 @@ impl<'a> DatadirModification<'a> { /// Drop a relation. pub async fn put_rel_drop(&mut self, rel: RelTag, ctx: &RequestContext) -> anyhow::Result<()> { - anyhow::ensure!(rel.relnode != 0, "invalid relnode"); + anyhow::ensure!(rel.relnode != 0, RelationError::InvalidRelnode); // Remove it from the directory entry let dir_key = rel_dir_to_key(rel.spcnode, rel.dbnode); diff --git a/pageserver/src/walingest.rs b/pageserver/src/walingest.rs index 68cf2a4645..8d4c1842bd 100644 --- a/pageserver/src/walingest.rs +++ b/pageserver/src/walingest.rs @@ -25,7 +25,7 @@ use postgres_ffi::v14::nonrelfile_utils::clogpage_precedes; use postgres_ffi::v14::nonrelfile_utils::slru_may_delete_clogsegment; use postgres_ffi::{fsm_logical_to_physical, page_is_new, page_set_lsn}; -use anyhow::Result; +use anyhow::{Context, Result}; use bytes::{Buf, Bytes, BytesMut}; use tracing::*; @@ -1082,7 +1082,10 @@ impl<'a> WalIngest<'a> { .await? { // create it with 0 size initially, the logic below will extend it - modification.put_rel_creation(rel, 0, ctx).await?; + modification + .put_rel_creation(rel, 0, ctx) + .await + .context("Relation Error")?; 0 } else { self.timeline.get_rel_size(rel, last_lsn, true, ctx).await?