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reftable: adapt writer_add_record() to propagate block_writer_add() errors 

Previously, writer_add_record() would flush the current block and retry
appending the record whenever block_writer_add() returned any nonzero
error. This forced an assumption that every failure meant the block was
full, even when errors such as memory allocation or I/O failures occurred.

Update the writer_add_record() to inspect the error code returned by
block_writer_add() and only flush and reinitialize the writer when the
error is REFTABLE_ENTRY_TOO_BIG_ERROR. For any other error, immediately
propagate it.

Signed-off-by: Meet Soni <meetsoni3017@gmail.com>
Acked-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Meet Soni 2025-03-19 20:59:26 +05:30 committed by Junio C Hamano
parent 27571684dd
commit 9ce297239b
1 changed files with 5 additions and 10 deletions
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15
reftable/writer.c
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@ -310,11 +310,12 @@ static int writer_add_record(struct reftable_writer *w,
* done. Otherwise the block writer may have hit the block size limit
* and needs to be flushed.
*/
if (!block_writer_add(w->block_writer, rec)) {
err = 0;
err = block_writer_add(w->block_writer, rec);
if (err == 0)
goto done;
}

if (err != REFTABLE_ENTRY_TOO_BIG_ERROR)
goto done;
/*
* The current block is full, so we need to flush and reinitialize the
* writer to start writing the next block.
@ -329,16 +330,10 @@ static int writer_add_record(struct reftable_writer *w,
/*
* Try to add the record to the writer again. If this still fails then
* the record does not fit into the block size.
*
* TODO: it would be great to have `block_writer_add()` return proper
* error codes so that we don't have to second-guess the failure
* mode here.
*/
err = block_writer_add(w->block_writer, rec);
if (err) {
err = REFTABLE_ENTRY_TOO_BIG_ERROR;
if (err)
goto done;
}

done:
return err;