[PATCH v5 11/17] bloom: annotate filters with hash version
STALE977d
From: Taylor Blau <hidden>
Date: 2024-01-16 22:09:36
Subsystem:
the rest · Maintainer:
Linus Torvalds
Revision v5 of 5 in this series.
Revisions (5)
In subsequent commits, we will want to load existing Bloom filters out of a commit-graph, even when the hash version they were computed with does not match the value of `commitGraph.changedPathVersion`. In order to differentiate between the two, add a "version" field to each Bloom filter. Signed-off-by: Taylor Blau <redacted> --- bloom.c | 11 ++++++++--- bloom.h | 1 + 2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/bloom.c b/bloom.c
index e9361b1c1f..9284b88e95 100644
--- a/bloom.c
+++ b/bloom.c@@ -88,6 +88,7 @@ int load_bloom_filter_from_graph(struct commit_graph *g, filter->data = (unsigned char *)(g->chunk_bloom_data + sizeof(unsigned char) * start_index + BLOOMDATA_CHUNK_HEADER_SIZE); + filter->version = g->bloom_filter_settings->hash_version; return 1; }
@@ -273,11 +274,13 @@ static int pathmap_cmp(const void *hashmap_cmp_fn_data UNUSED, return strcmp(e1->path, e2->path); } -static void init_truncated_large_filter(struct bloom_filter *filter) +static void init_truncated_large_filter(struct bloom_filter *filter, + int version) { filter->data = xmalloc(1); filter->data[0] = 0xFF; filter->len = 1; + filter->version = version; } struct bloom_filter *get_or_compute_bloom_filter(struct repository *r,
@@ -362,13 +365,15 @@ struct bloom_filter *get_or_compute_bloom_filter(struct repository *r, } if (hashmap_get_size(&pathmap) > settings->max_changed_paths) { - init_truncated_large_filter(filter); + init_truncated_large_filter(filter, + settings->hash_version); if (computed) *computed |= BLOOM_TRUNC_LARGE; goto cleanup; } filter->len = (hashmap_get_size(&pathmap) * settings->bits_per_entry + BITS_PER_WORD - 1) / BITS_PER_WORD; + filter->version = settings->hash_version; if (!filter->len) { if (computed) *computed |= BLOOM_TRUNC_EMPTY;
@@ -388,7 +393,7 @@ struct bloom_filter *get_or_compute_bloom_filter(struct repository *r, } else { for (i = 0; i < diff_queued_diff.nr; i++) diff_free_filepair(diff_queued_diff.queue[i]); - init_truncated_large_filter(filter); + init_truncated_large_filter(filter, settings->hash_version); if (computed) *computed |= BLOOM_TRUNC_LARGE;
diff --git a/bloom.h b/bloom.h
index 138d57a86b..330a140520 100644
--- a/bloom.h
+++ b/bloom.h@@ -55,6 +55,7 @@ struct bloom_filter_settings { struct bloom_filter { unsigned char *data; size_t len; + int version; }; /*
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2.43.0.334.gd4dbce1db5.dirty