[PATCH v2 0/5] reftable: fix writing multi-level indices

Hi,

this is the second version of my patch series that fixes writing of multi-level indices. There are two minor changes compared to v1:

  - Slightly rephrased a commit message.

  - Dropped an added newline that resulted in a new hunk.

The patch series continues to build on top of jc/reftable-core-fsync.

Thanks!

Patrick

Patrick Steinhardt (5):
  reftable/reader: be more careful about errors in indexed seeks
  reftable/writer: use correct type to iterate through index entries
  reftable/writer: simplify writing index records
  reftable/writer: fix writing multi-level indices
  reftable: document reading and writing indices

 reftable/reader.c         | 30 +++++++++++++++++++
 reftable/readwrite_test.c | 56 ++++++++++++++++++++++++++++++++++
 reftable/writer.c         | 63 ++++++++++++++++++++++-----------------
 3 files changed, 122 insertions(+), 27 deletions(-)

Range-diff against v1:
1:  ecf834a299 = 1:  ecf834a299 reftable/reader: be more careful about errors in indexed seeks
2:  88541d03be = 2:  88541d03be reftable/writer: use correct type to iterate through index entries
3:  b0982baacf ! 3:  b3de0b7f3b reftable/writer: simplify writing index records
    @@ Metadata
      ## Commit message ##
         reftable/writer: simplify writing index records
     
    -    When finishing the current section we may end up writing index records
    -    for the section to the table. The logic to do so essentially copies what
    -    we already have in `writer_add_record()`, making this more complicated
    -    than it really has to be.
    +    When finishing the current section some index records might be written
    +    for the section to the table. The logic that adds these records to the
    +    writer duplicates what we already have in `writer_add_record()`, making
    +    this more complicated than it really has to be.
     
    -    Simplify the code by using `writer_add_record()` instead.
    +    Simplify the code by using `writer_add_record()` instead. While at it,
    +    drop the unneeded braces around a loop to make the code conform to our
    +    code style better.
     
         Signed-off-by: Patrick Steinhardt <ps@pks.im>
     
      ## reftable/writer.c ##
    -@@ reftable/writer.c: static int writer_finish_section(struct reftable_writer *w)
    - 		w->index = NULL;
    - 		w->index_len = 0;
    - 		w->index_cap = 0;
    -+
    - 		for (i = 0; i < idx_len; i++) {
    - 			struct reftable_record rec = {
    - 				.type = BLOCK_TYPE_INDEX,
     @@ reftable/writer.c: static int writer_finish_section(struct reftable_writer *w)
      					.idx = idx[i],
      				},
4:  9c6622c409 = 4:  89a88cf83e reftable/writer: fix writing multi-level indices
5:  7850e65878 = 5:  c3492bbd42 reftable: document reading and writing indices