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Merge branch 'ns/core-fsyncmethod' into ns/batch-fsync

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* ns/core-fsyncmethod:
  configure.ac: fix HAVE_SYNC_FILE_RANGE definition
  core.fsyncmethod: correctly camel-case warning message
  core.fsync: fix incorrect expression for default configuration
  core.fsync: documentation and user-friendly aggregate options
  core.fsync: new option to harden the index
  core.fsync: add configuration parsing
  core.fsync: introduce granular fsync control infrastructure
  core.fsyncmethod: add writeout-only mode
  wrapper: make inclusion of Windows csprng header tightly scoped
This commit is contained in:
Junio C Hamano
2022-04-06 13:01:54 -07:00
parent b896f729e2 2e37594797
commit fca85986bb
26 changed files with 444 additions and 60 deletions
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48
cache.h
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@ -993,8 +993,54 @@ void reset_shared_repository(void);
extern int read_replace_refs;
extern char *git_replace_ref_base;
/*
* These values are used to help identify parts of a repository to fsync.
* FSYNC_COMPONENT_NONE identifies data that will not be a persistent part of the
* repository and so shouldn't be fsynced.
*/
enum fsync_component {
FSYNC_COMPONENT_NONE,
FSYNC_COMPONENT_LOOSE_OBJECT = 1 << 0,
FSYNC_COMPONENT_PACK = 1 << 1,
FSYNC_COMPONENT_PACK_METADATA = 1 << 2,
FSYNC_COMPONENT_COMMIT_GRAPH = 1 << 3,
FSYNC_COMPONENT_INDEX = 1 << 4,
};
#define FSYNC_COMPONENTS_OBJECTS (FSYNC_COMPONENT_LOOSE_OBJECT | \
FSYNC_COMPONENT_PACK)
#define FSYNC_COMPONENTS_DERIVED_METADATA (FSYNC_COMPONENT_PACK_METADATA | \
FSYNC_COMPONENT_COMMIT_GRAPH)
#define FSYNC_COMPONENTS_DEFAULT ((FSYNC_COMPONENTS_OBJECTS | \
FSYNC_COMPONENTS_DERIVED_METADATA) & \
~FSYNC_COMPONENT_LOOSE_OBJECT)
#define FSYNC_COMPONENTS_COMMITTED (FSYNC_COMPONENTS_OBJECTS)
#define FSYNC_COMPONENTS_ADDED (FSYNC_COMPONENTS_COMMITTED | \
FSYNC_COMPONENT_INDEX)
#define FSYNC_COMPONENTS_ALL (FSYNC_COMPONENT_LOOSE_OBJECT | \
FSYNC_COMPONENT_PACK | \
FSYNC_COMPONENT_PACK_METADATA | \
FSYNC_COMPONENT_COMMIT_GRAPH | \
FSYNC_COMPONENT_INDEX)
/*
* A bitmask indicating which components of the repo should be fsynced.
*/
extern enum fsync_component fsync_components;
extern int fsync_object_files;
extern int use_fsync;
enum fsync_method {
FSYNC_METHOD_FSYNC,
FSYNC_METHOD_WRITEOUT_ONLY
};
extern enum fsync_method fsync_method;
extern int core_preload_index;
extern int precomposed_unicode;
extern int protect_hfs;
@ -1701,6 +1747,8 @@ int copy_file_with_time(const char *dst, const char *src, int mode);
void write_or_die(int fd, const void *buf, size_t count);
void fsync_or_die(int fd, const char *);
int fsync_component(enum fsync_component component, int fd);
void fsync_component_or_die(enum fsync_component component, int fd, const char *msg);
ssize_t read_in_full(int fd, void *buf, size_t count);
ssize_t write_in_full(int fd, const void *buf, size_t count);