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2022-02-23reftable: rename writer_stats to reftable_writer_statsLibravatar Han-Wen Nienhuys1-1/+1
This function is part of the reftable API, so it should use the reftable_ prefix Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-02-23reftable: ensure that obj_id_len is >= 2 on writingLibravatar Han-Wen Nienhuys1-1/+3
When writing the same hash many times, we might decide to use a length-1 object ID prefix for the ObjectID => ref table, which is out of spec. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-02-23reftable: avoid writing empty keys at the block layerLibravatar Han-Wen Nienhuys1-2/+1
The public interface (reftable_writer) already ensures that keys are written in strictly increasing order, and an empty key by definition fails this check. However, by also enforcing this at the block layer, it is easier to verify that records (which are written into blocks) never have to consider the possibility of empty keys. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-02-16Merge branch 'hn/reftable-coverity-fixes'Libravatar Junio C Hamano1-18/+25
Problems identified by Coverity in the reftable code have been corrected. * hn/reftable-coverity-fixes: reftable: add print functions to the record types reftable: make reftable_record a tagged union reftable: remove outdated file reftable.c reftable: implement record equality generically reftable: make reftable-record.h function signatures const correct reftable: handle null refnames in reftable_ref_record_equal reftable: drop stray printf in readwrite_test reftable: order unittests by complexity reftable: all xxx_free() functions accept NULL arguments reftable: fix resource warning reftable: ignore remove() return value in stack_test.c reftable: check reftable_stack_auto_compact() return value reftable: fix resource leak blocksource.c reftable: fix resource leak in block.c error path reftable: fix OOB stack write in print functions
2022-01-20reftable: make reftable_record a tagged unionLibravatar Han-Wen Nienhuys1-18/+23
This reduces the amount of glue code, because we don't need a void pointer or vtable within the structure. The only snag is that reftable_index_record contain a strbuf, so it cannot be zero-initialized. To address this, use reftable_new_record() to return fresh instance, given a record type. Since reftable_new_record() doesn't cause heap allocation anymore, it should be balanced with reftable_record_release() rather than reftable_record_destroy(). Thanks to Peff for the suggestion. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-01-20reftable: all xxx_free() functions accept NULL argumentsLibravatar Han-Wen Nienhuys1-0/+2
This fixes NULL derefs in error paths. Spotted by Coverity. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-23reftable: signal overflowLibravatar Han-Wen Nienhuys1-0/+3
reflog entries have unbounded size. In theory, each log ('g') block in reftable can have an arbitrary size, so the format allows for arbitrarily sized reflog messages. However, in the implementation, we are not scaling the log blocks up with the message, and writing a large message fails. This triggers a failure for reftable in t7006-pager.sh. Until this is fixed more structurally, report an error from within the reftable library for easier debugging. Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-10-08reftable: write reftable filesLibravatar Han-Wen Nienhuys1-0/+690
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>