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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/server/receiver.c
+7 -5
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@@ -470,11 +470,12 @@ static bool receiver_save_file(File* file, void* context_pointer) {
} else {
result = file_save_to_disk_full(context->config->receive_root_directory, file, context->config);
}
/* A directory's times are deferred, never applied inline: collect the
metadata now and apply it at the end. -O/--omit-dir-times is honored by
dir_time_list_apply's caller (see receiver_send_success_frame). */
/* A directory's metadata is deferred, never applied inline: collect it now
and apply it at the end. -O/--omit-dir-times and --preserve_perms/-times
are honored by dir_metadata_list_apply's caller (see
receiver_send_success_frame). */
if (result != FILE_SAVE_ERROR && file->is_dir && file->metadata &&
dir_times_should_capture(context->config) &&
dir_metadata_should_capture(context->config) &&
!dir_time_list_add(&context->dir_times, file->path, file->metadata)) {
file_destroy(file);
return false;
@@ -514,7 +515,8 @@ static bool receiver_send_success_frame(int fd, void* context_pointer) {
phases have committed, so it is finally safe to stamp directory times.
This runs after the deferred deletion because receiver_process commits it
before calling this success frame. */
dir_time_list_apply(&context->dir_times, context->config->receive_root_directory);
dir_metadata_list_apply(&context->dir_times, context->config->receive_root_directory,
context->config);
return receiver_send_final_success(fd, context->config, &context->outcomes);
}