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Incremental sync: --incremental flag to skip unchanged files

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- New STATUS_CHECK protocol status (value 6)
- Client sends path + size + mtime; server replies OK (skip) or NEXT (send)
- config.h/c: use_incremental field sent/received over wire
- file.c/h: file_send_single_calls_no_path helper for incremental path
- client_cli.c: --incremental flag
- client_send.c: per-file check before send in both single and chunk paths
- server.c: STATUS_CHECK handling in receive_files()
- multiprocessing.c: STATUS_CHECK handling in receive_thread()
- test.py: incremental sync test case
This commit is contained in:
TapTap
2026-07-16 15:38:48 +02:00
parent ecd486a8d0
commit 109064441a
11 changed files with 199 additions and 11 deletions
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src/client/client_send.c
+36 -6
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@@ -32,17 +32,47 @@ int send_chunk(Client *client, Chunk *chunk, Config *config) {
data_destroy(data);
} else if (config->use_sendfile && !config->use_compression) {
for (int i = 0; i < chunk->element_count; i++) {
if (!send_status(client->file_descriptor, STATUS_NEXT)) return -1;
if (config->use_incremental) {
if (!send_status(client->file_descriptor, STATUS_CHECK)) return -1;
if (!send_str(client->file_descriptor, chunk->items[i]->path)) return -1;
unsigned long long fsize = chunk->items[i]->data->size;
long long mtime = chunk->items[i]->metadata ? chunk->items[i]->metadata->mtime_sec : 0;
if (!send_n_data(client->file_descriptor, &fsize, sizeof(fsize))) return -1;
if (!send_n_data(client->file_descriptor, &mtime, sizeof(mtime))) return -1;
Status s;
if (!receive_status(client->file_descriptor, &s)) return -1;
if (s == STATUS_OK) continue;
if (s != STATUS_NEXT) return -1;
} else {
if (!send_status(client->file_descriptor, STATUS_NEXT)) return -1;
}
if (!file_send_sendfile(chunk->items[i], client->file_descriptor, config->use_metadata))
return -1;
}
} else {
for (int i = 0; i < chunk->element_count; i++) {
if (!send_status(client->file_descriptor, STATUS_NEXT)) return -1;
if (!file_send_single_calls(chunk->items[i], client->file_descriptor,
config->use_metadata,
config->use_compression ? config->compression_level : 0))
return -1;
if (config->use_incremental) {
if (!send_status(client->file_descriptor, STATUS_CHECK)) return -1;
if (!send_str(client->file_descriptor, chunk->items[i]->path)) return -1;
unsigned long long fsize = chunk->items[i]->data->size;
long long mtime = chunk->items[i]->metadata ? chunk->items[i]->metadata->mtime_sec : 0;
if (!send_n_data(client->file_descriptor, &fsize, sizeof(fsize))) return -1;
if (!send_n_data(client->file_descriptor, &mtime, sizeof(mtime))) return -1;
Status s;
if (!receive_status(client->file_descriptor, &s)) return -1;
if (s == STATUS_OK) continue;
if (s != STATUS_NEXT) return -1;
if (!file_send_single_calls_no_path(chunk->items[i], client->file_descriptor,
config->use_metadata,
config->use_compression ? config->compression_level : 0))
return -1;
} else {
if (!send_status(client->file_descriptor, STATUS_NEXT)) return -1;
if (!file_send_single_calls(chunk->items[i], client->file_descriptor,
config->use_metadata,
config->use_compression ? config->compression_level : 0))
return -1;
}
}
}
return 0;