Junio C Hamano
295bac407e
The object database files backend has been updated to reload alternates when an object lookup fails on retry. This restores a lost capability to find objects moved to a newly added alternate during a concurrent repository rewrite, with caching and deduplication optimizations to avoid performance regressions. * ps/odb-reload-alternates: odb/source-files: only reload alternates when the file has changed odb/source-files: avoid stat'ing already-known alternates odb/source-files: simplify directory duplication detection odb/source-files: reload alternates on retry odb/source-files: always load alternates via primary object directory odb/source-files: rename alternates-related functions
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
#ifndef ODB_SOURCE_FILES_H
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#define ODB_SOURCE_FILES_H
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#include "odb/source.h"
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#include "statinfo.h"
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#include "strmap.h"
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struct odb_source_loose;
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struct odb_source_packed;
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/*
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* A single object directory that encapsulates access to both the loose and
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* packed backend. This can either be the primary or an alternate object
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* directory.
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*/
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struct odb_files_dir {
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/* Absolute path to the object directory. */
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char *abspath;
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/* List of alternate object directories. */
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struct odb_files_dir *next;
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/* The two sources derived from this object directory. */
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struct odb_source_loose *loose;
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struct odb_source_packed *packed;
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/*
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* Whether this is the local object directory of the owning
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* repository. Directories added via alternates are not local.
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*/
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bool local;
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};
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struct odb_files_dir *odb_files_dir_new(struct object_database *odb,
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const char *path, bool local);
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void odb_files_dir_free(struct odb_files_dir *dir);
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/*
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* The files object database source uses a combination of loose objects and
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* packfiles. It is the default backend used by Git to store objects.
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*/
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struct odb_source_files {
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struct odb_source base;
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/*
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* List of all object directories; the main directory is first (and
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* cannot be NULL after initialization). Subsequent directories are
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* alternates.
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*/
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struct odb_files_dir *dirs;
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struct odb_files_dir **dirs_tail;
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/*
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* Set of directory paths that have already been linked into this
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* source. This set is used to detect the case where the same directory
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* is registered multiple times.
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*/
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struct strset dir_paths;
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/*
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* Whether directory paths shall be compared case-insensitively, as
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* determined by "core.ignoreCase".
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*/
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int dir_paths_icase;
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/* Stat data of the "info/alternates" file. */
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struct stat_validity alternates_validity;
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};
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/* Allocate and initialize a new object source. */
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struct odb_source_files *odb_source_files_new(struct object_database *odb,
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const char *payload,
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enum odb_new_flags flags);
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/*
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* Optimize the files object database source by repacking loose objects and
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* packfiles as needed. Returns 0 on success, a negative error code otherwise.
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*/
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int odb_source_files_optimize(struct odb_source *source,
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const struct odb_optimize_options *opts);
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/*
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* Check whether optimization of the files object database source is required
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* given the provided options. Returns true if optimization should be
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* performed, false otherwise.
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*/
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bool odb_source_files_optimize_required(struct odb_source *source,
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const struct odb_optimize_options *opts);
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/*
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* Cast the given object database source to the files backend. This will cause
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* a BUG in case the source doesn't use this backend.
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*/
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static inline struct odb_source_files *odb_source_files_downcast(struct odb_source *source)
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{
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if (source->type != ODB_SOURCE_FILES)
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BUG("trying to downcast source of type '%s' to '%s'",
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odb_source_type_to_name(source->type),
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odb_source_type_to_name(ODB_SOURCE_FILES));
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return container_of(source, struct odb_source_files, base);
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}
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/*
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* Find "files" directory by its object directory path. Returns a `NULL`
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* pointer in case the object directory could not be found.
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*/
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struct odb_files_dir *odb_source_files_find_dir(struct object_database *odb, const char *obj_dir);
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#endif
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