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feat: per-attribute preservation flags -p/-t/-o/-g with --no-* negations (protocol 2.22.0)

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Split FastSync's single use_metadata bundle into four independent rsync-parity attributes: preserve_perms, preserve_times, preserve_owner, preserve_group. use_metadata is now a derived transport bit (config_derived_use_metadata).

CLI: real -p/--perms, -t/--times, -o/--owner, -g/--group plus --no-perms/--no-times/--no-owner/--no-group (short and long) and --no-preserve; -a is now rsync -rlptgoD; --preserve = -pt; -A implies -p; -X does not; --chmod implies -p; --usermap/--groupmap/--chown imply owner/group per side; --incremental/--delta still auto-preserve unless negated.

Receiver: per-attribute FileAttrPolicy gating for files, dirs (modes applied at end of transfer), symlinks and specials; rsync -E read-bit rule; new files get source_mode & ~umask sanitized (no group/other write); per-side identity resolution; deferred directory metadata; batch dir-metadata replay; daemon modules without 'client owner = yes' no longer refuse plain -a but force super off (no ownership) with a warning.

Wire: PROTOCOL_VERSION 2.21.0 -> 2.22.0 (four appended config bools, golden 653 / 95530566005420798). FileMetadata/chunk/batch framing unchanged. Docs/CHANGELOG/CMake updated to 2.22.0.
This commit is contained in:
TapTap
2026-09-15 19:32:02 +02:00
parent b3f7cad4db
commit 34970b961c
35 changed files with 2523 additions and 485 deletions
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src/shared/file_receive.h
+15 -10
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@@ -48,10 +48,12 @@ typedef struct {
} DirTimeList;
/* Capture gate shared by the sender-side and receiver-side sinks: directory
* metadata is accumulated only when --times/--metadata is in effect and
* -O/--omit-dir-times does not suppress it. Kept here, next to the accumulator
* it guards, so both call sites express the same condition. */
bool dir_times_should_capture(const Config* config);
* metadata is accumulated only when a directory attribute is requested
* (-p/--perms for directory modes, or -t/--times for directory mtimes with
* -O/--omit-dir-times not suppressing them) and metadata rides the wire. Kept
* here, next to the accumulator it guards, so both call sites express the same
* condition. */
bool dir_metadata_should_capture(const Config* config);
void dir_time_list_init(DirTimeList* list);
void dir_time_list_free(DirTimeList* list);
@@ -59,12 +61,15 @@ void dir_time_list_free(DirTimeList* list);
* allocation failure OR when the cumulative entry/byte caps would be exceeded
* (the caller fails the transfer). */
bool dir_time_list_add(DirTimeList* list, const char* wire_path, const FileMetadata* metadata);
/* Apply every accumulated directory's mtime (and atime when captured) beneath
* `root_directory`, confined fd-relative. Best-effort per entry: an absent
* directory (an empty/pruned source dir that was deliberately not created) or a
* non-directory at the path is skipped QUIETLY, an unreachable one with a
* warning, and never fatal. */
void dir_time_list_apply(const DirTimeList* list, const char* root_directory);
/* Apply every accumulated directory's metadata beneath `root_directory`,
* confined fd-relative. Times (mtime, plus atime when -U captured one) are
* applied only when config->preserve_times && !config->omit_dir_times; the mode
* (through --chmod when configured) is applied only when config->preserve_perms.
* Best-effort per entry: an absent directory (an empty/pruned source dir that
* was deliberately not created) or a non-directory at the path is skipped
* QUIETLY, an unreachable one with a warning, and never fatal. */
void dir_metadata_list_apply(const DirTimeList* list, const char* root_directory,
const Config* config);
/* A received delete-manifest frame: the keep-set (`keeps`, destination-relative
paths the sender transferred/keeps) plus `protected`, destination-relative