TapTap/FastSync
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 2 Wiki Activity

perf(protocol): pack metadata into one frame (PROTOCOL 2.20.0)

Browse Source
This commit is contained in:
TapTap
2026-09-13 04:08:36 +02:00
parent ddc71a7df5
commit 317d5d081a
8 changed files with 210 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/test_metadata.c
+139 -31
View File
@@ -5,6 +5,8 @@
#include "test_utils.h"
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
@@ -134,6 +136,115 @@ static void test_metadata_send_null() {
close(p[1]);
}
/* protocol 2.20.0: metadata is one packed frame. With metadata present the
* wire record is exactly sizeof(int32_t) + FILE_METADATA_WIRE_SIZE bytes (the
* present flag followed by the fixed field record); absent metadata is a lone
* int32 zero. */
static void test_metadata_wire_is_one_packed_frame() {
io_set_bwlimit(0);
int p[2];
EXPECT_EQ_INT(pipe(p), 0);
io_set_fds(p[0], p[1]);
FileMetadata original = {.mode = 0640,
.uid = 42,
.gid = 43,
.mtime_sec = 111,
.mtime_nsec = 222,
.atime_valid = true,
.atime_sec = 333,
.atime_nsec = 444,
.crtime_valid = false,
.crtime_sec = 0,
.crtime_nsec = 0};
EXPECT_TRUE(metadata_send(p[1], &original));
unsigned char wire[sizeof(int32_t) + FILE_METADATA_WIRE_SIZE];
EXPECT_EQ_INT((int)read(p[0], wire, sizeof(wire)), (int)sizeof(wire));
int32_t flag;
memcpy(&flag, wire, sizeof(flag));
EXPECT_EQ_INT(flag, 1);
int avail = -1;
EXPECT_EQ_INT(ioctl(p[0], FIONREAD, &avail), 0);
EXPECT_EQ_INT(avail, 0);
/* The present frame decodes in one shot with the shared codec. */
char* cursor = (char*)wire;
FileMetadata* decoded = metadata_from_buf(&cursor);
EXPECT_NOT_NULL(decoded);
EXPECT_EQ_INT((int)(cursor - (char*)wire), (int)sizeof(wire));
EXPECT_EQ_INT(decoded->mode, 0640);
EXPECT_EQ_INT(decoded->uid, 42);
EXPECT_EQ_INT(decoded->gid, 43);
EXPECT_EQ_INT(decoded->mtime_sec, 111);
EXPECT_EQ_INT(decoded->mtime_nsec, 222);
EXPECT_TRUE(decoded->atime_valid);
EXPECT_EQ_INT(decoded->atime_sec, 333);
EXPECT_EQ_INT(decoded->atime_nsec, 444);
EXPECT_FALSE(decoded->crtime_valid);
free(decoded);
/* Absent metadata is a lone int32 zero (4 bytes). */
EXPECT_TRUE(metadata_send(p[1], NULL));
EXPECT_EQ_INT((int)read(p[0], wire, sizeof(int32_t)), (int)sizeof(int32_t));
memcpy(&flag, wire, sizeof(flag));
EXPECT_EQ_INT(flag, 0);
avail = -1;
EXPECT_EQ_INT(ioctl(p[0], FIONREAD, &avail), 0);
EXPECT_EQ_INT(avail, 0);
close(p[0]);
close(p[1]);
}
/* Round-trip over a socketpair (not just a pipe): present metadata compares
* equal field-by-field and absent metadata yields NULL with ok == 1. */
static void test_metadata_send_receive_socketpair() {
io_set_bwlimit(0);
int sv[2];
EXPECT_EQ_INT(socketpair(AF_UNIX, SOCK_STREAM, 0, sv), 0);
io_set_fds(sv[0], sv[1]);
FileMetadata original = {.mode = 0600,
.uid = 7,
.gid = 8,
.mtime_sec = 1000,
.mtime_nsec = 1,
.atime_valid = true,
.atime_sec = 2000,
.atime_nsec = 2,
.crtime_valid = true,
.crtime_sec = 3000,
.crtime_nsec = 3};
EXPECT_TRUE(metadata_send(sv[1], &original));
int ok = 0;
FileMetadata* received = metadata_receive(sv[0], &ok);
EXPECT_NOT_NULL(received);
EXPECT_EQ_INT(ok, 1);
EXPECT_EQ_INT(received->mode, 0600);
EXPECT_EQ_INT(received->uid, 7);
EXPECT_EQ_INT(received->gid, 8);
EXPECT_EQ_INT(received->mtime_sec, 1000);
EXPECT_EQ_INT(received->mtime_nsec, 1);
EXPECT_TRUE(received->atime_valid);
EXPECT_EQ_INT(received->atime_sec, 2000);
EXPECT_EQ_INT(received->atime_nsec, 2);
EXPECT_TRUE(received->crtime_valid);
EXPECT_EQ_INT(received->crtime_sec, 3000);
EXPECT_EQ_INT(received->crtime_nsec, 3);
free(received);
EXPECT_TRUE(metadata_send(sv[1], NULL));
ok = 0;
received = metadata_receive(sv[0], &ok);
EXPECT_NULL(received);
EXPECT_EQ_INT(ok, 1);
close(sv[0]);
close(sv[1]);
}
static void test_metadata_rejects_invalid_values() {
int p[2];
EXPECT_EQ_INT(pipe(p), 0);
@@ -148,36 +259,30 @@ static void test_metadata_rejects_invalid_values() {
}
/* metadata_receive must reject an out-of-range atime/crtime nsec even when the
* flag would otherwise be valid (defense-in-depth on the -U/-N wire fields). */
* flag would otherwise be valid (defense-in-depth on the -U/-N wire fields).
* The packed record is built by the shared codec so the out-of-range value
* actually reaches the wire. */
static void test_metadata_receive_rejects_bad_optional_times() {
int p[2];
EXPECT_EQ_INT(pipe(p), 0);
io_set_fds(p[0], p[1]);
int32_t present = 1;
int32_t mode = 0644;
int32_t uid = 1000;
int32_t gid = 1000;
int64_t mtime_sec = 1;
int64_t mtime_nsec = 0;
int32_t atime_valid = 1;
int64_t atime_sec = 1;
int64_t atime_nsec = 2000000000; /* invalid: >= 1e9 */
EXPECT_TRUE(send_n_data(p[1], &present, sizeof(present)));
EXPECT_TRUE(send_n_data(p[1], &mode, sizeof(mode)));
EXPECT_TRUE(send_n_data(p[1], &uid, sizeof(uid)));
EXPECT_TRUE(send_n_data(p[1], &gid, sizeof(gid)));
EXPECT_TRUE(send_n_data(p[1], &mtime_sec, sizeof(mtime_sec)));
EXPECT_TRUE(send_n_data(p[1], &mtime_nsec, sizeof(mtime_nsec)));
EXPECT_TRUE(send_n_data(p[1], &atime_valid, sizeof(atime_valid)));
EXPECT_TRUE(send_n_data(p[1], &atime_sec, sizeof(atime_sec)));
EXPECT_TRUE(send_n_data(p[1], &atime_nsec, sizeof(atime_nsec)));
int32_t crtime_valid = 0;
int64_t crtime_sec = 0;
int64_t crtime_nsec = 0;
EXPECT_TRUE(send_n_data(p[1], &crtime_valid, sizeof(crtime_valid)));
EXPECT_TRUE(send_n_data(p[1], &crtime_sec, sizeof(crtime_sec)));
EXPECT_TRUE(send_n_data(p[1], &crtime_nsec, sizeof(crtime_nsec)));
FileMetadata bad = {.mode = 0644,
.uid = 1000,
.gid = 1000,
.mtime_sec = 1,
.mtime_nsec = 0,
.atime_valid = true,
.atime_sec = 1,
.atime_nsec = 2000000000, /* invalid: >= 1e9 */
.crtime_valid = false,
.crtime_sec = 0,
.crtime_nsec = 0};
char packed[sizeof(int32_t) + FILE_METADATA_WIRE_SIZE];
char* write_ptr = packed;
metadata_to_buf(&write_ptr, &bad);
EXPECT_TRUE(send_n_data(p[1], packed, sizeof(packed)));
int ok = 1;
EXPECT_NULL(metadata_receive(p[0], &ok));
EXPECT_EQ_INT(ok, 0);
@@ -235,12 +340,13 @@ static void test_file_restore_metadata() {
const char* content = "test content";
EXPECT_TRUE(file_write_to_disk(path, content, strlen(content), false, false));
FileMetadata m;
m.mode = 0644;
m.uid = getuid();
m.gid = getgid();
m.mtime_sec = 1234567890;
m.mtime_nsec = 0;
FileMetadata m = {.mode = 0644,
.uid = getuid(),
.gid = getgid(),
.mtime_sec = 1234567890,
.mtime_nsec = 0,
.atime_valid = false,
.crtime_valid = false};
file_restore_metadata(path, &m, false);
@@ -347,6 +453,8 @@ void test_metadata() {
test_metadata_from_buf_null();
test_metadata_send_receive_roundtrip();
test_metadata_send_null();
test_metadata_wire_is_one_packed_frame();
test_metadata_send_receive_socketpair();
test_metadata_rejects_invalid_values();
test_metadata_receive_rejects_bad_optional_times();
test_metadata_mtime_window();