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feat(filter): receiver-side protect/risk engine for dest-only entries

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- new bounded config-wire block (BLOCK_PROTECT_RULES) serializes the sender's
  compiled filter rules to the receiver (bounded count + 256 KiB patterns;
  strict action/sides validation)
- receiver evaluates protect/risk in the whole-tree extras walk and the
  per-directory delete plans, so a dest-only entry matching 'P' is kept like
  rsync; dry-run would-delete enumeration also honours it
- --filter flips to parity (115/11/31); per-dir merge receiver re-derivation
  remains the documented residual
This commit is contained in:
TapTap
2026-09-19 13:52:48 +02:00
parent c9f94ea46e
commit 82959395fb
16 changed files with 448 additions and 84 deletions
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src/shared/delete_plan.c
+21 -4
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@@ -546,12 +546,18 @@ static int open_plan_dir(const Config* config, const char* dir) {
typedef struct PlanSkips {
DeleteSkipEntry* entries;
int count;
/* Receiver-side delete-protection rules received on the config frame (NULL
when the sender sent none). Evaluated per extra so a protect/risk rule is
honored under --delete-during/--delete-delay exactly like the whole-tree
commit walker. */
const FilterRuleList* protect_rules;
} PlanSkips;
static bool build_plan_skips(const Config* config, const DeletePlanSession* session,
PlanSkips* out) {
out->entries = NULL;
out->count = 0;
out->protect_rules = config->protect_rules;
int count = (config->delay_updates ? 1 : 0) + config->basis_count +
session->protected_prefixes->size + session->size_skipped->size;
if (count == 0)
@@ -733,6 +739,10 @@ static bool process_children(int dirfd, const char* dir_rel, const ArrayList* ke
bool is_dir = S_ISDIR(st.st_mode);
bool in_keep_dirs = is_dir && list_contains_str(keep_dirs, entry->d_name);
bool in_keep_files = !is_dir && list_contains_str(keep_files, entry->d_name);
bool rule_protected =
skips->protect_rules &&
filter_rules_apply_side(skips->protect_rules, child_rel, entry->d_name, is_dir,
FILTER_SIDE_RECEIVER) == FILTER_ACTION_PROTECT;
if (in_keep_dirs) {
local_survives = true;
} else if (keep_dirs && !is_dir && list_contains_str(keep_dirs, entry->d_name)) {
@@ -750,11 +760,18 @@ static bool process_children(int dirfd, const char* dir_rel, const ArrayList* ke
else if (!removed)
local_survives = true;
} else if (is_dir) {
bool removed = false;
if (!process_extra_dir(dirfd, entry->d_name, child_rel, force_now, skips, session, &removed))
operation_ok = false;
else if (!removed)
if (rule_protected) {
local_survives = true;
} else {
bool removed = false;
if (!process_extra_dir(dirfd, entry->d_name, child_rel, force_now, skips, session,
&removed))
operation_ok = false;
else if (!removed)
local_survives = true;
}
} else if (rule_protected) {
local_survives = true;
} else {
if (!process_extra_file(dirfd, entry->d_name, child_rel, force_now, session))
operation_ok = false;