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commit-graph: use chunk-format write API

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The commit-graph write logic is ready to make use of the chunk-format
write API. Each chunk write method is already in the correct prototype.
We only need to use the 'struct chunkfile' pointer and the correct API
calls.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2021-02-18 14:07:25 +00:00 committed by Junio C Hamano
parent 570df42610
commit 47410aa837
1 changed files with 36 additions and 81 deletions
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117
commit-graph.c
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@ -19,6 +19,7 @@
#include "shallow.h"
#include "json-writer.h"
#include "trace2.h"
#include "chunk-format.h"
void git_test_write_commit_graph_or_die(void)
{
@ -44,7 +45,6 @@ void git_test_write_commit_graph_or_die(void)
#define GRAPH_CHUNKID_BLOOMINDEXES 0x42494458 /* "BIDX" */
#define GRAPH_CHUNKID_BLOOMDATA 0x42444154 /* "BDAT" */
#define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */
#define MAX_NUM_CHUNKS 9
#define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16)
@ -1758,27 +1758,17 @@ static int write_graph_chunk_base(struct hashfile *f,
return 0;
}
typedef int (*chunk_write_fn)(struct hashfile *f,
void *data);
struct chunk_info {
uint32_t id;
uint64_t size;
chunk_write_fn write_fn;
};
static int write_commit_graph_file(struct write_commit_graph_context *ctx)
{
uint32_t i;
int fd;
struct hashfile *f;
struct lock_file lk = LOCK_INIT;
struct chunk_info chunks[MAX_NUM_CHUNKS + 1];
const unsigned hashsz = the_hash_algo->rawsz;
struct strbuf progress_title = STRBUF_INIT;
int num_chunks = 3;
uint64_t chunk_offset;
struct object_id file_hash;
struct chunkfile *cf;
if (ctx->split) {
struct strbuf tmp_file = STRBUF_INIT;
@ -1824,76 +1814,50 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
}
chunks[0].id = GRAPH_CHUNKID_OIDFANOUT;
chunks[0].size = GRAPH_FANOUT_SIZE;
chunks[0].write_fn = write_graph_chunk_fanout;
chunks[1].id = GRAPH_CHUNKID_OIDLOOKUP;
chunks[1].size = hashsz * ctx->commits.nr;
chunks[1].write_fn = write_graph_chunk_oids;
chunks[2].id = GRAPH_CHUNKID_DATA;
chunks[2].size = (hashsz + 16) * ctx->commits.nr;
chunks[2].write_fn = write_graph_chunk_data;
cf = init_chunkfile(f);
add_chunk(cf, GRAPH_CHUNKID_OIDFANOUT, GRAPH_FANOUT_SIZE,
write_graph_chunk_fanout);
add_chunk(cf, GRAPH_CHUNKID_OIDLOOKUP, hashsz * ctx->commits.nr,
write_graph_chunk_oids);
add_chunk(cf, GRAPH_CHUNKID_DATA, (hashsz + 16) * ctx->commits.nr,
write_graph_chunk_data);
if (git_env_bool(GIT_TEST_COMMIT_GRAPH_NO_GDAT, 0))
ctx->write_generation_data = 0;
if (ctx->write_generation_data) {
chunks[num_chunks].id = GRAPH_CHUNKID_GENERATION_DATA;
chunks[num_chunks].size = sizeof(uint32_t) * ctx->commits.nr;
chunks[num_chunks].write_fn = write_graph_chunk_generation_data;
num_chunks++;
}
if (ctx->num_generation_data_overflows) {
chunks[num_chunks].id = GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW;
chunks[num_chunks].size = sizeof(timestamp_t) * ctx->num_generation_data_overflows;
chunks[num_chunks].write_fn = write_graph_chunk_generation_data_overflow;
num_chunks++;
}
if (ctx->num_extra_edges) {
chunks[num_chunks].id = GRAPH_CHUNKID_EXTRAEDGES;
chunks[num_chunks].size = 4 * ctx->num_extra_edges;
chunks[num_chunks].write_fn = write_graph_chunk_extra_edges;
num_chunks++;
}
if (ctx->write_generation_data)
add_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA,
sizeof(uint32_t) * ctx->commits.nr,
write_graph_chunk_generation_data);
if (ctx->num_generation_data_overflows)
add_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW,
sizeof(timestamp_t) * ctx->num_generation_data_overflows,
write_graph_chunk_generation_data_overflow);
if (ctx->num_extra_edges)
add_chunk(cf, GRAPH_CHUNKID_EXTRAEDGES,
4 * ctx->num_extra_edges,
write_graph_chunk_extra_edges);
if (ctx->changed_paths) {
chunks[num_chunks].id = GRAPH_CHUNKID_BLOOMINDEXES;
chunks[num_chunks].size = sizeof(uint32_t) * ctx->commits.nr;
chunks[num_chunks].write_fn = write_graph_chunk_bloom_indexes;
num_chunks++;
chunks[num_chunks].id = GRAPH_CHUNKID_BLOOMDATA;
chunks[num_chunks].size = sizeof(uint32_t) * 3
+ ctx->total_bloom_filter_data_size;
chunks[num_chunks].write_fn = write_graph_chunk_bloom_data;
num_chunks++;
add_chunk(cf, GRAPH_CHUNKID_BLOOMINDEXES,
sizeof(uint32_t) * ctx->commits.nr,
write_graph_chunk_bloom_indexes);
add_chunk(cf, GRAPH_CHUNKID_BLOOMDATA,
sizeof(uint32_t) * 3
+ ctx->total_bloom_filter_data_size,
write_graph_chunk_bloom_data);
}
if (ctx->num_commit_graphs_after > 1) {
chunks[num_chunks].id = GRAPH_CHUNKID_BASE;
chunks[num_chunks].size = hashsz * (ctx->num_commit_graphs_after - 1);
chunks[num_chunks].write_fn = write_graph_chunk_base;
num_chunks++;
}
chunks[num_chunks].id = 0;
chunks[num_chunks].size = 0;
if (ctx->num_commit_graphs_after > 1)
add_chunk(cf, GRAPH_CHUNKID_BASE,
hashsz * (ctx->num_commit_graphs_after - 1),
write_graph_chunk_base);
hashwrite_be32(f, GRAPH_SIGNATURE);
hashwrite_u8(f, GRAPH_VERSION);
hashwrite_u8(f, oid_version());
hashwrite_u8(f, num_chunks);
hashwrite_u8(f, get_num_chunks(cf));
hashwrite_u8(f, ctx->num_commit_graphs_after - 1);
chunk_offset = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH;
for (i = 0; i <= num_chunks; i++) {
uint32_t chunk_write[3];
chunk_write[0] = htonl(chunks[i].id);
chunk_write[1] = htonl(chunk_offset >> 32);
chunk_write[2] = htonl(chunk_offset & 0xffffffff);
hashwrite(f, chunk_write, 12);
chunk_offset += chunks[i].size;
}
if (ctx->report_progress) {
strbuf_addf(&progress_title,
Q_("Writing out commit graph in %d pass",
@ -1905,17 +1869,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
num_chunks * ctx->commits.nr);
}
for (i = 0; i < num_chunks; i++) {
uint64_t start_offset = f->total + f->offset;
if (chunks[i].write_fn(f, ctx))
return -1;
if (f->total + f->offset != start_offset + chunks[i].size)
BUG("expected to write %"PRId64" bytes to chunk %"PRIx32", but wrote %"PRId64" instead",
chunks[i].size, chunks[i].id,
f->total + f->offset - start_offset);
}
write_chunkfile(cf, ctx);
stop_progress(&ctx->progress);
strbuf_release(&progress_title);
@ -1932,6 +1886,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
close_commit_graph(ctx->r->objects);
finalize_hashfile(f, file_hash.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC);
free_chunkfile(cf);
if (ctx->split) {
FILE *chainf = fdopen_lock_file(&lk, "w");