mirror of
https://github.com/git/git.git
synced 2024-10-30 05:47:53 +01:00
c8828530b7
We don't ever refer to the descriptor after mmap-ing it. And keeping it open means we can run out of descriptors in degenerate cases (e.g., thousands of split chain files). Let's close it as soon as possible. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
#ifndef COMMIT_GRAPH_H
|
|
#define COMMIT_GRAPH_H
|
|
|
|
#include "git-compat-util.h"
|
|
#include "repository.h"
|
|
#include "string-list.h"
|
|
#include "cache.h"
|
|
#include "object-store.h"
|
|
#include "oidset.h"
|
|
|
|
#define GIT_TEST_COMMIT_GRAPH "GIT_TEST_COMMIT_GRAPH"
|
|
#define GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD "GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD"
|
|
|
|
struct commit;
|
|
|
|
char *get_commit_graph_filename(struct object_directory *odb);
|
|
int open_commit_graph(const char *graph_file, int *fd, struct stat *st);
|
|
|
|
/*
|
|
* Given a commit struct, try to fill the commit struct info, including:
|
|
* 1. tree object
|
|
* 2. date
|
|
* 3. parents.
|
|
*
|
|
* Returns 1 if and only if the commit was found in the packed graph.
|
|
*
|
|
* See parse_commit_buffer() for the fallback after this call.
|
|
*/
|
|
int parse_commit_in_graph(struct repository *r, struct commit *item);
|
|
|
|
/*
|
|
* It is possible that we loaded commit contents from the commit buffer,
|
|
* but we also want to ensure the commit-graph content is correctly
|
|
* checked and filled. Fill the graph_pos and generation members of
|
|
* the given commit.
|
|
*/
|
|
void load_commit_graph_info(struct repository *r, struct commit *item);
|
|
|
|
struct tree *get_commit_tree_in_graph(struct repository *r,
|
|
const struct commit *c);
|
|
|
|
struct commit_graph {
|
|
const unsigned char *data;
|
|
size_t data_len;
|
|
|
|
unsigned char hash_len;
|
|
unsigned char num_chunks;
|
|
uint32_t num_commits;
|
|
struct object_id oid;
|
|
char *filename;
|
|
struct object_directory *odb;
|
|
|
|
uint32_t num_commits_in_base;
|
|
struct commit_graph *base_graph;
|
|
|
|
const uint32_t *chunk_oid_fanout;
|
|
const unsigned char *chunk_oid_lookup;
|
|
const unsigned char *chunk_commit_data;
|
|
const unsigned char *chunk_extra_edges;
|
|
const unsigned char *chunk_base_graphs;
|
|
};
|
|
|
|
struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st,
|
|
struct object_directory *odb);
|
|
struct commit_graph *read_commit_graph_one(struct repository *r,
|
|
struct object_directory *odb);
|
|
struct commit_graph *parse_commit_graph(void *graph_map, size_t graph_size);
|
|
|
|
/*
|
|
* Return 1 if and only if the repository has a commit-graph
|
|
* file and generation numbers are computed in that file.
|
|
*/
|
|
int generation_numbers_enabled(struct repository *r);
|
|
|
|
enum commit_graph_write_flags {
|
|
COMMIT_GRAPH_WRITE_APPEND = (1 << 0),
|
|
COMMIT_GRAPH_WRITE_PROGRESS = (1 << 1),
|
|
COMMIT_GRAPH_WRITE_SPLIT = (1 << 2),
|
|
/* Make sure that each OID in the input is a valid commit OID. */
|
|
COMMIT_GRAPH_WRITE_CHECK_OIDS = (1 << 3)
|
|
};
|
|
|
|
enum commit_graph_split_flags {
|
|
COMMIT_GRAPH_SPLIT_UNSPECIFIED = 0,
|
|
COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED = 1,
|
|
COMMIT_GRAPH_SPLIT_REPLACE = 2
|
|
};
|
|
|
|
struct split_commit_graph_opts {
|
|
int size_multiple;
|
|
int max_commits;
|
|
timestamp_t expire_time;
|
|
enum commit_graph_split_flags flags;
|
|
};
|
|
|
|
/*
|
|
* The write_commit_graph* methods return zero on success
|
|
* and a negative value on failure. Note that if the repository
|
|
* is not compatible with the commit-graph feature, then the
|
|
* methods will return 0 without writing a commit-graph.
|
|
*/
|
|
int write_commit_graph_reachable(struct object_directory *odb,
|
|
enum commit_graph_write_flags flags,
|
|
const struct split_commit_graph_opts *split_opts);
|
|
int write_commit_graph(struct object_directory *odb,
|
|
struct string_list *pack_indexes,
|
|
struct oidset *commits,
|
|
enum commit_graph_write_flags flags,
|
|
const struct split_commit_graph_opts *split_opts);
|
|
|
|
#define COMMIT_GRAPH_VERIFY_SHALLOW (1 << 0)
|
|
|
|
int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags);
|
|
|
|
void close_commit_graph(struct raw_object_store *);
|
|
void free_commit_graph(struct commit_graph *);
|
|
|
|
/*
|
|
* Disable further use of the commit graph in this process when parsing a
|
|
* "struct commit".
|
|
*/
|
|
void disable_commit_graph(struct repository *r);
|
|
|
|
#endif
|