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zvfs: testcase重写

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1iaan
2026-03-02 07:27:48 +00:00
parent 4f3e2a592f
commit f82e089325
23 changed files with 1597 additions and 932 deletions
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3
.gitignore vendored Normal file → Executable file
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@@ -1,6 +1,9 @@
*.o *.o
*.d *.d
*.so *.so
test/bin
zvfs/func_test zvfs/func_test
zvfs_meta.txt zvfs_meta.txt
zvfs/zvfs_meta.txt zvfs/zvfs_meta.txt

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.gitmodules vendored Normal file → Executable file
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Makefile Normal file → Executable file
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@@ -1,9 +1,16 @@
.PHONY: all clean zvfs .PHONY: all clean zvfs test run-test
all: zvfs all: zvfs
zvfs: zvfs:
$(MAKE) -C zvfs $(MAKE) -C zvfs
test:
$(MAKE) -C test
run-test:
$(MAKE) -C test run-test
clean: clean:
$(MAKE) -C zvfs clean $(MAKE) -C zvfs clean
$(MAKE) -C test clean

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README.md Normal file → Executable file
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@@ -3,7 +3,8 @@
```shell ```shell
git submodule update --init --recursive git submodule update --init --recursive
cd /home/lian/share/10.1-spdk/spdk cd spdk
./scripts/pkgdep.sh
./configure --with-shared ./configure --with-shared
make -j make -j

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plan.md Normal file
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# ZVFS -> RocksDB LD_PRELOAD 可重入改造计划（给 Codex 执行）
> 目标：这是一份“可中断、可恢复、可分段提交”的实施计划。
> 原则：每阶段都能独立编译、独立验证、独立回滚，不要求一次性改完。
---
## 0. 执行约束（必须遵守）
1. **一次只做一个阶段**，每阶段结束后必须通过该阶段验收再进入下一阶段。
2. **不跨阶段混改**：例如阶段 1 不改 hook 覆盖，阶段 3 不重构线程模型。
3. **每阶段必须留下恢复锚点**：
- 文档状态更新（本文件“阶段状态”区）
- 代码中保留临时兼容开关（若有）
- 能独立提交 commit（建议）
4. **失败可回退**：阶段内失败仅回退本阶段改动，不影响已完成阶段。
5. **默认保持旧行为可用**，新增能力通过新路径启用，逐步替换旧路径。
---
## 1. 阶段状态（可重入）
- [ ] Phase 1: IO 请求结构体落地（单线程兼容模式）
- [ ] Phase 2: Worker + 多线程执行模型落地
- [ ] Phase 3: 偏移型 IO 完整化（pread/pwrite 语义）
- [ ] Phase 4: RocksDB 核心 hook 补齐（P0）
- [ ] Phase 5: 目录/锁/截断接口补齐（P1）
- [ ] Phase 6: 元数据一致性与崩溃恢复增强
- [ ] Phase 7: 性能增强与观测
> 重入方式：中断后先看此状态区 + 对应阶段“完成定义”，从未完成阶段继续。
---
## 2. 基线与分支策略
### 2.1 基线要求
- 当前 `libzvfs.so` 可正常构建。
- 当前 `func_test` 可运行。
- 已确认 `/zvfs` 路径仍由现有 hook 接管。
### 2.2 分支与提交建议
- 每阶段 1 个分支或 1 个 commit：
- `phase1-req-struct`
- `phase2-worker-thread`
- `phase3-offset-io`
- ...
- commit message 模板：
- `phaseX: <what> + <compat mode/DoD>`
---
## 3. 分阶段实施
## Phase 1: IO 请求结构体落地（不改线程模型）
### 目标
先把“每次系统调用复用 file 临时字段”的问题解开；引入可扩展请求对象，为后续多线程做准备。
**本阶段仍允许单线程执行路径**（内部可继续使用现有 waiter）。
### 改动范围
- `zvfs/zvfs.h`
- `zvfs/zvfs.c`
- 尽量不改 `zvfs/zvfs_hook.c` 的接口覆盖面（只做必要适配）
### 任务清单
1. 新增 `zvfs_req_t`（最小字段）：
- `op`, `file`, `buf`, `count`, `offset`, `ret`, `op_errno`, `done`
- 可选：`need_copy_back`, `actual_io_count`
2. 给现有读写流程加“请求入参”版本：
- 新增 `zvfs_read_req(req)` / `zvfs_write_req(req)` 内部函数
- 旧 API `zvfs_read/zvfs_write` 变成薄包装（构造 req 后调用）
3. 去除对 `file->io_count/write_staging_buf/finished` 的强依赖：
- 保留字段可兼容，但主流程改为优先使用 req 字段
4. 错误返回统一：
- 内部负 errno -> 外部返回值 + errno 映射规则固定
### 完成定义（DoD）
- 编译通过。
- 现有 `func_test` 全通过。
- 无并发改造前提下，行为与旧版一致（回归结果一致）。
### 重入点
- 代码里出现 `zvfs_req_t` 且 `zvfs_read/zvfs_write` 已封装请求对象。
- 若中断，优先检查旧路径是否仍可用，再继续替换剩余 call path。
---
## Phase 2: Worker + 多线程执行模型
### 目标
将“调用线程主动 poll SPDK”改为“专用 worker 线程 poll + 请求队列”。
建立线程安全基础，不追求本阶段 hook 覆盖齐全。
### 改动范围
- `zvfs/zvfs.h`
- `zvfs/zvfs.c`
- `zvfs/zvfs_hook.c`（仅初始化、提交流程相关）
### 任务清单
1. 新增 `zvfs_worker_t`：
- `pthread_t tid`
- 请求队列（先用 mutex + list + cond，后续可换 MPSC）
- `running/stopping` 状态
2. 新增生命周期函数：
- `zvfs_worker_start()`
- `zvfs_worker_stop()`
- 在 mount/init 时启动，在 atexit/unmount 时停止
3. 新增提交流程：
- `zvfs_submit_and_wait(req)`：调用线程阻塞等待完成
- worker 线程执行 SPDK 异步链并回填 req
4. 替换 `waiter()` 主路径：
- 保留 waiter 仅作为 fallback（编译开关控制）
5. 锁与并发保护（最小闭环）：
- 全局状态锁：`g_fs/g_mounted/fd_map`
- 文件级锁：`offset` 更新、close 与 io 竞争
### 完成定义（DoD）
- `db_bench --threads=4` 不崩溃、不死锁（先小规模）。
- 旧单线程 case 仍通过。
- 调用线程不再直接 `spdk_thread_poll`。
### 重入点
- worker 生命周期已接管主流程（可在日志中看到 worker 启动/停止）。
- 若中断，优先确保 stop 路径可达，避免进程退出挂死。
---
## Phase 3: 偏移型 IO 完整化（pread/pwrite 语义）
### 目标
补齐 RocksDB 高频调用语义：`pread/pwrite` 不改文件偏移。
把 `read/write` 变成 `pread/pwrite + offset 管理` 的包装。
### 改动范围
- `zvfs/zvfs.h`
- `zvfs/zvfs.c`
- `zvfs/zvfs_hook.c`
### 任务清单
1. 新增核心接口：
- `zvfs_pread(file, buf, count, offset)`
- `zvfs_pwrite(file, buf, count, offset)`
2. 改造 read/write：
- `read`：在 file lock 下读取并推进 `current_offset`
- `write`：在 file lock 下决定 offset（含 O_APPEND）
3. 明确并发语义：
- 同一 fd 并发 pread/pwrite 允许并行（不同 offset）
- 同一 fd 的 read/write 偏移操作受 file lock 串行
### 完成定义（DoD）
- `pread/pwrite` 回归用例通过。
- 同一 fd 的并发 `pread` 不互相污染 offset。
### 重入点
- hook 层可区分 `read/write` 与 `pread/pwrite` 路径。
- 若中断，先保证 `read/write` 仍有正确 fallback。
---
## Phase 4: RocksDB 核心 hook 补齐（P0）
### 目标
先覆盖 RocksDB “能跑起来”最关键接口。
### 改动范围
- `zvfs/zvfs_hook.c`
- 必要时 `zvfs/zvfs.h` 新增声明
### 任务清单（按优先级）
1. 打开类：
- `open/open64/openat/openat64/__open_2/__open64_2`
2. IO 类：
- `pread/pread64/pwrite/pwrite64`
3. 元数据类：
- `fstat/stat/lstat/fstatat/access`
4. 持久化类：
- `fsync/fdatasync`
5. 文件变更类：
- `rename/renameat/renameat2/unlink/unlinkat`
### 实现要求
- 非 `/zvfs` 路径必须透传 real libc。
- 所有失败分支必须设置 errno。
- 统一 dlsym 初始化：`pthread_once`，避免递归。
### 完成定义（DoD）
- RocksDB 基础 workload（单线程）可跑通：
- `fillseq`, `fillrandom`, `readrandom`
- `strace -f` 观察 `/zvfs` 关键 syscall 已被接管。
### 重入点
- 每新增一组 hook 独立提交，失败时可只回退该组。
---
## Phase 5: 目录/锁/截断接口补齐（P1）
### 目标
补齐 RocksDB 稳定运行需要的辅助接口。
### 改动范围
- `zvfs/zvfs_hook.c`
- `zvfs/zvfs.c`（必要后端支撑）
### 任务清单
1. 截断：
- `ftruncate/truncate`
2. 锁：
- `fcntl` 最少支持 `F_SETLK/F_SETLKW/F_UNLCK/F_GETLK`
3. 目录：
- `mkdir/rmdir/opendir/readdir/closedir`
4. 容量提示（可选但建议）：
- `fallocate/posix_fallocate`（不支持时明确 `EOPNOTSUPP`）
### 完成定义（DoD）
- RocksDB 多线程基础 workload 可稳定运行（`--threads=4/8`）。
- LOCK 文件语义满足单进程多线程正确性。
### 重入点
- `fcntl` 与目录接口可拆成两个子阶段提交。
---
## Phase 6: 元数据一致性与崩溃恢复增强
### 目标
解决 `zvfs_meta.txt` 全量覆盖、崩溃窗口、恢复不确定问题。
### 改动范围
- `zvfs/zvfs_hook.c`（meta load/save）
- `zvfs/zvfs.c`（关键操作强制 flush 时机）
- 文档与测试脚本
### 任务清单
1. 元数据写入策略：
- 从“每次全量覆盖”改为“批量 + 关键点强制刷盘”
2. 元数据文件格式增强：
- 增加版本号 + CRC
3. 恢复路径：
- 加载失败时回退到最近完整版本（若实现双文件/快照）
4. 关键操作一致性点：
- `rename/unlink/truncate/fsync` 后策略明确
### 完成定义（DoD）
- 人工崩溃注入后（kill -9）可重新打开 DB。
- 元数据损坏能被检测并报错，不默默产生脏状态。
### 重入点
- 先做“格式版本化 + 校验”，再做“批量策略”。
---
## Phase 7: 性能增强与观测
### 目标
在正确性稳定后提性能，确保收益可量化。
### 改动范围
- `zvfs/zvfs.c`
- 性能脚本与统计输出
### 任务清单
1. 请求对象池 / DMA buffer 复用
2. 减少全局锁竞争（热点路径细化锁）
3. 元数据 debounce 与批量刷盘参数化
4. 增加指标：
- op 次数、失败率、平均/尾延迟、队列深度
### 完成定义（DoD）
- 与旧版本对比，多线程 `db_bench` 吞吐显著提升（目标 >1.5x，按实测调整）。
- 无新增数据一致性回归。
### 重入点
- 每个优化项独立开关，可单独启停做 A/B。
---
## 4. 阶段间依赖关系（严格）
1. 必须先完成 Phase 1 再做 Phase 2。
2. 必须先完成 Phase 2 再做 Phase 3/4。
3. Phase 4（核心 hook）完成后再做 Phase 5（辅助 hook）。
4. Phase 6/7 必须基于 Phase 5 稳定分支。
---
## 5. 验收矩阵（执行时打勾）
### Phase 1
- [ ] 编译通过
- [ ] `func_test` 通过
- [ ] 请求对象已接管 read/write 内部主流程
### Phase 2
- [ ] worker 模型接管
- [ ] 多线程 smoke 测试通过
- [ ] 无死锁/退出挂死
### Phase 3
- [ ] `pread/pwrite` 语义正确
- [ ] offset 并发污染问题消失
### Phase 4
- [ ] P0 hook 集合已实现
- [ ] RocksDB 单线程 workload 跑通
### Phase 5
- [ ] P1 hook 集合已实现
- [ ] RocksDB 多线程 workload 稳定
### Phase 6
- [ ] 元数据校验与恢复策略生效
- [ ] 崩溃恢复测试通过
### Phase 7
- [ ] 关键指标可观测
- [ ] 性能目标达成或给出瓶颈结论
---
## 6. 风险与应对（执行版）
1. **接口补齐不完整**
- 应对：每阶段跑 `strace -f`，统计 `/zvfs` 相关未接管 syscall。
2. **并发死锁**
- 应对：固定锁顺序；debug 模式打印锁获取日志。
3. **行为回归**
- 应对：保留兼容开关（old path）直到该阶段验收通过。
4. **性能退化**
- 应对：优化项独立开关，逐项 A/B，不一次性合并。
---
## 7. 给 Codex 的执行模板（每阶段复用）
1. 阅读本阶段“目标/任务/DoD/重入点”
2. 只改本阶段文件与最小依赖
3. 本地编译 + 对应测试
4. 更新“阶段状态”勾选
5. 输出：
- 改了什么
- 测了什么
- 还剩什么
6. 等待用户确认再进入下一阶段

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test/Makefile Executable file
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CC ?= gcc
CFLAGS ?= -O2 -Wall -Wextra -std=gnu11
SRCS := $(sort $(wildcard test_*.c))
BIN_DIR ?= bin
BIN_NAMES := $(SRCS:.c=)
BINS := $(addprefix $(BIN_DIR)/,$(BIN_NAMES))
RUN_DIR ?= /tmp/zvfs-test
RUN_BINS ?= test_basic test_lseek test_dual_open_same_file test_two_files \
test_single_file_perf test_single_file_random_perf \
test_single_file_random_noaligned_perf test_write_file test_read_delete_file
.PHONY: all clean list run-test
all: $(BINS)
$(BIN_DIR):
mkdir -p $@
$(BIN_DIR)/%: %.c test_utils.h | $(BIN_DIR)
$(CC) $(CFLAGS) -o $@ $<
list:
@printf "%s\n" $(BINS)
run-test: all
@mkdir -p $(RUN_DIR)
@pass=0; fail=0; \
for t in $(RUN_BINS); do \
printf "\n[RUN] %s\n" "$$t"; \
if ./$(BIN_DIR)/$$t $(RUN_DIR); then \
pass=$$((pass + 1)); \
else \
fail=$$((fail + 1)); \
fi; \
done; \
printf "\n=== run-test summary: PASS=%d FAIL=%d ===\n" $$pass $$fail; \
test $$fail -eq 0
clean:
$(RM) $(BINS)
-rmdir $(BIN_DIR)

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test/test_basic.c Executable file
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#include "test_utils.h"
static int test_basic(const char *path)
{
printf("\n=== test_basic ===\n");
printf("open: %s\n", path);
int fd = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd < 0) { perror("open"); return 1; }
const char *msg = "ABCDEFGHIJKL";
ssize_t w = write(fd, msg, strlen(msg));
if (w < 0) { perror("write"); return 2; }
printf("write: %zd\n", w);
const char *msg2 = "MNOPQRSTUVWXYZ";
ssize_t w2 = write(fd, msg2, strlen(msg2));
if (w2 < 0) { perror("write"); return 2; }
printf("write: %zd\n", w2);
close(fd);
fd = open(path, O_RDONLY);
if (fd < 0) { perror("open R"); return 3; }
char buf[10];
memset(buf, 0, sizeof(buf));
ssize_t r = read(fd, buf, sizeof(buf));
if (r < 0) { perror("read"); return 4; }
printf("read: %zd bytes: %.*s\n", r, (int)r, buf);
char buf2[512];
memset(buf2, 0, sizeof(buf2));
ssize_t r2 = read(fd, buf2, sizeof(buf2));
if (r2 < 0) { perror("read"); return 4; }
printf("read: %zd bytes: %.*s\n", r2, (int)r2, buf2);
close(fd);
if (unlink(path) != 0) { perror("unlink"); return 5; }
printf("unlink: ok\n");
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_basic(path);
return report_result("test_basic", rc);
}

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test/test_dual_open_same_file.c Executable file
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#include "test_utils.h"
static int test_dual_open_same_file(const char *path)
{
printf("\n=== test_dual_open_same_file ===\n");
int fd_init = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_init < 0) { perror("open init"); return 1; }
const char *init = "0123456789";
if (write(fd_init, init, 10) != 10) { perror("write init"); return 2; }
close(fd_init);
int fd_w = open(path, O_WRONLY);
if (fd_w < 0) { perror("open W"); return 3; }
int fd_r = open(path, O_RDONLY);
if (fd_r < 0) { perror("open R"); return 4; }
printf("fd_w=%d fd_r=%d\n", fd_w, fd_r);
if (write(fd_w, "HELLO", 5) != 5) { perror("write"); return 5; }
printf("write via fd_w: HELLO (overwrite first 5 bytes)\n");
char buf[32] = {0};
lseek(fd_r, 0, SEEK_SET);
ssize_t r = read(fd_r, buf, sizeof(buf));
printf("read via fd_r: %zd bytes: %.*s (expect: HELLO56789)\n", r, (int)r, buf);
lseek(fd_w, 0, SEEK_END);
if (write(fd_w, "!!!", 3) != 3) { perror("write append"); return 6; }
printf("write append via fd_w: !!!\n");
lseek(fd_r, 10, SEEK_SET);
memset(buf, 0, sizeof(buf));
r = read(fd_r, buf, sizeof(buf));
printf("read appended via fd_r: %zd bytes: %.*s (expect: !!!)\n", r, (int)r, buf);
close(fd_w);
close(fd_r);
unlink(path);
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_dual_open_same_file(path);
return report_result("test_dual_open_same_file", rc);
}

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test/test_lseek.c Executable file
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#include "test_utils.h"
static int test_lseek(const char *path)
{
printf("\n=== test_lseek ===\n");
int fd = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd < 0) { perror("open"); return 1; }
const char *alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
if (write(fd, alpha, 26) != 26) { perror("write"); return 2; }
printf("write 26 bytes: %s\n", alpha);
off_t pos = lseek(fd, 0, SEEK_SET);
printf("lseek SEEK_SET 0 -> %ld\n", (long)pos);
char buf[32] = {0};
ssize_t r = read(fd, buf, 5);
printf("read 5 bytes: %.*s (expect: ABCDE)\n", (int)r, buf);
pos = lseek(fd, 3, SEEK_CUR);
printf("lseek SEEK_CUR +3 -> %ld\n", (long)pos);
memset(buf, 0, sizeof(buf));
r = read(fd, buf, 5);
printf("read 5 bytes: %.*s (expect: IJKLM)\n", (int)r, buf);
pos = lseek(fd, -5, SEEK_END);
printf("lseek SEEK_END -5 -> %ld\n", (long)pos);
memset(buf, 0, sizeof(buf));
r = read(fd, buf, 10);
printf("read %zd bytes: %.*s (expect: VWXYZ)\n", r, (int)r, buf);
pos = lseek(fd, 30, SEEK_SET);
printf("lseek SEEK_SET 30 -> %ld\n", (long)pos);
if (write(fd, "!", 1) != 1) { perror("write hole"); return 3; }
lseek(fd, 26, SEEK_SET);
memset(buf, 0xAA, sizeof(buf));
r = read(fd, buf, 5);
printf("read hole+1: %zd bytes, hole[0]=%02X hole[1]=%02X hole[2]=%02X "
"hole[3]=%02X last='%c' (expect: 00 00 00 00 '!')\n",
r, (unsigned char)buf[0], (unsigned char)buf[1],
(unsigned char)buf[2], (unsigned char)buf[3], buf[4]);
close(fd);
unlink(path);
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_lseek(path);
return report_result("test_lseek", rc);
}

31
test/test_read_delete_file.c Executable file
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#include "test_utils.h"
static int test_read_delete_file(const char *path)
{
printf("\n=== test_read_delete_file ===\n");
int fd = open(path, O_RDONLY);
if (fd < 0) { perror("open"); return 1; }
printf("open: %s fd=%d\n", path, fd);
char buf[256] = {0};
ssize_t r = read(fd, buf, sizeof(buf));
if (r < 0) { perror("read"); close(fd); return 2; }
printf("read: %zd bytes: %.*s\n", r, (int)r, buf);
close(fd);
printf("close: ok\n");
if (unlink(path) != 0) { perror("unlink"); return 3; }
printf("unlink: ok\n");
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_read_delete_file(path);
return report_result("test_read_delete_file", rc);
}

92
test/test_single_file_perf.c Executable file
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#include "test_utils.h"
static int test_single_file_perf(const char *path)
{
size_t io_size = 128 * 1024;
size_t max_size = 2ULL * 1024 * 1024 * 1024;
size_t max_count = max_size / io_size;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Max file: %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
unlink(path);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open write"); free(buf); return 1; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
size_t wpos = 0;
do {
if (wpos >= max_count) {
lseek(fd, 0, SEEK_SET);
wpos = 0;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("write");
close(fd);
free(buf);
return 2;
}
wcount++;
wpos++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)(wcount * io_size) / (1024.0 * 1024.0);
printf("\nWRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open read"); free(buf); return 3; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
ssize_t r = read(fd, buf, io_size);
if (r <= 0) {
lseek(fd, 0, SEEK_SET);
continue;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)(rcount * io_size) / (1024.0 * 1024.0);
printf("\nREAD:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_single_file_perf(path);
return report_result("test_single_file_perf", rc);
}

116
test/test_single_file_random_noaligned_perf.c Executable file
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#include "test_utils.h"
static int test_single_file_random_noaligned_perf(const char *path)
{
size_t io_size = 128 * 1024;
size_t max_size = 2ULL * 1024 * 1024 * 1024;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_random_noaligned_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Range : %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
srand(0x1234);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
unlink(path);
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open rand write"); free(buf); return 2; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
do {
off_t offset = (off_t)(rand() % (max_size - io_size));
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand write");
close(fd);
free(buf);
return 3;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("rand write");
close(fd);
free(buf);
return 4;
}
wcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)wcount * io_size / 1024 / 1024;
printf("\nRANDOM WRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open rand read"); free(buf); return 5; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
off_t offset = (off_t)(rand() % (max_size - io_size));
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand read");
close(fd);
free(buf);
return 6;
}
ssize_t r = read(fd, buf, io_size);
if (r < 0) {
perror("rand read");
close(fd);
free(buf);
return 7;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)rcount * io_size / 1024 / 1024;
printf("\nRANDOM READ:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_single_file_random_noaligned_perf(path);
return report_result("test_single_file_random_noaligned_perf", rc);
}

119
test/test_single_file_random_perf.c Executable file
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#include "test_utils.h"
static int test_single_file_random_perf(const char *path)
{
size_t io_size = 128 * 1024;
size_t max_size = 2ULL * 1024 * 1024 * 1024;
size_t max_count = max_size / io_size;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_random_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Range : %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
srand(0x1234);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
unlink(path);
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open rand write"); free(buf); return 2; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
do {
size_t blk = rand() % max_count;
off_t offset = (off_t)blk * io_size;
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand write");
close(fd);
free(buf);
return 3;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("rand write");
close(fd);
free(buf);
return 4;
}
wcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)wcount * io_size / 1024 / 1024;
printf("\nRANDOM WRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open rand read"); free(buf); return 5; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
size_t blk = rand() % max_count;
off_t offset = (off_t)blk * io_size;
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand read");
close(fd);
free(buf);
return 6;
}
ssize_t r = read(fd, buf, io_size);
if (r < 0) {
perror("rand read");
close(fd);
free(buf);
return 7;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)rcount * io_size / 1024 / 1024;
printf("\nRANDOM READ:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_single_file_random_perf(path);
return report_result("test_single_file_random_perf", rc);
}

78
test/test_two_files.c Executable file
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#include "test_utils.h"
static int test_two_files(const char *path_a, const char *path_b)
{
printf("\n=== test_two_files ===\n");
int fd_a = open(path_a, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_a < 0) { perror("open A"); return 1; }
int fd_b = open(path_b, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_b < 0) { perror("open B"); return 2; }
printf("fd_a=%d fd_b=%d\n", fd_a, fd_b);
const char *data_a = "File-A: Hello World!";
const char *data_b = "File-B: Goodbye World!";
if (write(fd_a, data_a, strlen(data_a)) < 0) { perror("write A"); return 3; }
if (write(fd_b, data_b, strlen(data_b)) < 0) { perror("write B"); return 4; }
printf("write A: %s\n", data_a);
printf("write B: %s\n", data_b);
lseek(fd_a, 0, SEEK_SET);
lseek(fd_b, 0, SEEK_SET);
char buf_a[64] = {0};
char buf_b[64] = {0};
ssize_t r_a = read(fd_a, buf_a, sizeof(buf_a));
ssize_t r_b = read(fd_b, buf_b, sizeof(buf_b));
printf("read A: %zd bytes: %.*s\n", r_a, (int)r_a, buf_a);
printf("read B: %zd bytes: %.*s\n", r_b, (int)r_b, buf_b);
int ok = 1;
if (strncmp(buf_a, data_a, strlen(data_a)) != 0) {
printf("FAIL: A content mismatch!\n");
ok = 0;
}
if (strncmp(buf_b, data_b, strlen(data_b)) != 0) {
printf("FAIL: B content mismatch!\n");
ok = 0;
}
if (ok) {
printf("PASS: both files read back correctly\n");
}
lseek(fd_a, 0, SEEK_END);
if (write(fd_a, "[A-TAIL]", 8) != 8) { perror("append A"); return 5; }
lseek(fd_b, 8, SEEK_SET);
if (write(fd_b, "Hi! ", 7) != 7) { perror("overwrite B"); return 6; }
lseek(fd_a, 0, SEEK_SET);
lseek(fd_b, 0, SEEK_SET);
memset(buf_a, 0, sizeof(buf_a));
memset(buf_b, 0, sizeof(buf_b));
r_a = read(fd_a, buf_a, sizeof(buf_a));
r_b = read(fd_b, buf_b, sizeof(buf_b));
printf("after cross-write:\n");
printf(" A: %.*s\n", (int)r_a, buf_a);
printf(" B: %.*s\n", (int)r_b, buf_b);
close(fd_a);
close(fd_b);
unlink(path_a);
unlink(path_b);
return 0;
}
int main(int argc, char **argv)
{
char path_a[PATH_MAX];
char path_b[PATH_MAX];
const char *dir = argc >= 2 ? argv[1] : NULL;
make_path(path_a, sizeof(path_a), dir, "file_a.dat");
make_path(path_b, sizeof(path_b), dir, "file_b.dat");
int rc = test_two_files(path_a, path_b);
return report_result("test_two_files", rc);
}

40
test/test_utils.h Executable file
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#ifndef TEST_UTILS_H
#define TEST_UTILS_H
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
static inline double time_diff_sec(struct timespec a, struct timespec b)
{
return (b.tv_sec - a.tv_sec) + (b.tv_nsec - a.tv_nsec) / 1000000000.0;
}
static inline void make_path(char *out, size_t out_sz, const char *dir, const char *name)
{
if (dir && dir[0] != 0) {
snprintf(out, out_sz, "%s/%s", dir, name);
} else {
snprintf(out, out_sz, "/tmp/%s", name);
}
}
static inline int report_result(const char *name, int rc)
{
printf("\n=== %s %s ===\n", name, rc == 0 ? "PASSED" : "FAILED");
return rc;
}
#endif

27
test/test_write_file.c Executable file
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@@ -0,0 +1,27 @@
#include "test_utils.h"
static int test_write_file(const char *path)
{
printf("\n=== test_write_file ===\n");
int fd = open(path, O_CREAT | O_RDWR, 0644);
if (fd < 0) { perror("open"); return 1; }
printf("open: %s fd=%d\n", path, fd);
const char *msg = "Hello, zvfs!";
ssize_t w = write(fd, msg, strlen(msg));
if (w < 0) { perror("write"); close(fd); return 2; }
printf("write: %zd bytes: %s\n", w, msg);
close(fd);
printf("close: ok\n");
return 0;
}
int main(int argc, char **argv)
{
char path[PATH_MAX];
make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
int rc = test_write_file(path);
return report_result("test_write_file", rc);
}

644
zvfs/func_test.c
View File

@@ -1,644 +0,0 @@
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <stdint.h>
static double time_diff_sec(struct timespec a, struct timespec b)
{
return (b.tv_sec - a.tv_sec) +
(b.tv_nsec - a.tv_nsec) / 1000000000.0;
}
static int test_single_file_perf(const char *path)
{
size_t io_size = 128 * 1024;
// size_t io_size = 4096;
size_t max_size = 2ULL * 1024 * 1024 * 1024; /* 最大 2GB，循环覆写 */
size_t max_count = max_size / io_size;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Max file: %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
unlink(path);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
/* ================= WRITE ================= */
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open write"); free(buf); return 1; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
size_t wpos = 0; /* 当前写位置（以块为单位） */
do {
/* 超过最大文件大小，seek 回头循环覆写 */
if (wpos >= max_count) {
lseek(fd, 0, SEEK_SET);
wpos = 0;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("write");
close(fd);
free(buf);
return 2;
}
wcount++;
wpos++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)(wcount * io_size) / (1024.0 * 1024.0);
printf("\nWRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
/* ================= READ ================= */
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open read"); free(buf); return 3; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
ssize_t r = read(fd, buf, io_size);
if (r <= 0) {
lseek(fd, 0, SEEK_SET);
continue;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)(rcount * io_size) / (1024.0 * 1024.0);
printf("\nREAD:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
static int test_single_file_random_perf(const char *path)
{
size_t io_size = 128 * 1024;
size_t max_size = 2ULL * 1024 * 1024 * 1024;
size_t max_count = max_size / io_size;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_random_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Range : %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
srand(0x1234);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
unlink(path);
/* ================= RANDOM WRITE ================= */
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open rand write"); free(buf); return 2; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
do {
size_t blk = rand() % max_count;
off_t offset = (off_t)blk * io_size;
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand write");
close(fd);
free(buf);
return 3;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("rand write");
close(fd);
free(buf);
return 4;
}
wcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)wcount * io_size / 1024 / 1024;
printf("\nRANDOM WRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
/* ================= RANDOM READ ================= */
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open rand read"); free(buf); return 5; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
size_t blk = rand() % max_count;
off_t offset = (off_t)blk * io_size;
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand read");
close(fd);
free(buf);
return 6;
}
ssize_t r = read(fd, buf, io_size);
if (r < 0) {
perror("rand read");
close(fd);
free(buf);
return 7;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)rcount * io_size / 1024 / 1024;
printf("\nRANDOM READ:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
static int test_single_file_random_noaligned_perf(const char *path)
{
size_t io_size = 128 * 1024;
size_t max_size = 2ULL * 1024 * 1024 * 1024;
size_t max_count = max_size / io_size;
int test_sec = 10;
int direct = 0;
printf("\n=== test_single_file_random_perf ===\n");
printf("Path : %s\n", path);
printf("IO size : %zu KB\n", io_size / 1024);
printf("Range : %zu MB\n", max_size / 1024 / 1024);
printf("Duration: %d sec\n", test_sec);
srand(0x1234);
char *buf = aligned_alloc(4096, io_size);
if (!buf) { perror("aligned_alloc"); return 1; }
memset(buf, 'A', io_size);
struct timespec t1, t2, now;
unlink(path);
/* ================= RANDOM WRITE ================= */
int fd = open(path, O_CREAT | O_RDWR | direct, 0644);
if (fd < 0) { perror("open rand write"); free(buf); return 2; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t wcount = 0;
do {
off_t offset = (off_t)(rand() % (max_size - io_size));
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand write");
close(fd);
free(buf);
return 3;
}
if (write(fd, buf, io_size) != (ssize_t)io_size) {
perror("rand write");
close(fd);
free(buf);
return 4;
}
wcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double wsec = time_diff_sec(t1, t2);
double wmb = (double)wcount * io_size / 1024 / 1024;
printf("\nRANDOM WRITE:\n");
printf(" total : %.1f MB\n", wmb);
printf(" time : %.3f sec\n", wsec);
printf(" IOPS : %.0f ops/sec\n", wcount / wsec);
printf(" BW : %.2f MB/s\n", wmb / wsec);
/* ================= RANDOM READ ================= */
fd = open(path, O_RDONLY | direct);
if (fd < 0) { perror("open rand read"); free(buf); return 5; }
clock_gettime(CLOCK_MONOTONIC, &t1);
size_t rcount = 0;
do {
off_t offset = (off_t)(rand() % (max_size - io_size));
if (lseek(fd, offset, SEEK_SET) < 0) {
perror("lseek rand read");
close(fd);
free(buf);
return 6;
}
ssize_t r = read(fd, buf, io_size);
if (r < 0) {
perror("rand read");
close(fd);
free(buf);
return 7;
}
rcount++;
clock_gettime(CLOCK_MONOTONIC, &now);
} while (time_diff_sec(t1, now) < test_sec);
clock_gettime(CLOCK_MONOTONIC, &t2);
close(fd);
double rsec = time_diff_sec(t1, t2);
double rmb = (double)rcount * io_size / 1024 / 1024;
printf("\nRANDOM READ:\n");
printf(" total : %.1f MB\n", rmb);
printf(" time : %.3f sec\n", rsec);
printf(" IOPS : %.0f ops/sec\n", rcount / rsec);
printf(" BW : %.2f MB/s\n", rmb / rsec);
unlink(path);
free(buf);
return 0;
}
/* ------------------------------------------------------------------ */
/* Test 1: 原有基础测试 */
/* ------------------------------------------------------------------ */
static int test_basic(const char *path)
{
printf("\n=== test_basic ===\n");
printf("open: %s\n", path);
int fd = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd < 0) { perror("open"); return 1; }
const char *msg = "ABCDEFGHIJKL";
ssize_t w = write(fd, msg, strlen(msg));
if (w < 0) { perror("write"); return 2; }
printf("write: %zd\n", w);
const char *msg2 = "MNOPQRSTUVWXYZ";
ssize_t w2 = write(fd, msg2, strlen(msg2));
if (w2 < 0) { perror("write"); return 2; }
printf("write: %zd\n", w2);
close(fd);
fd = open(path, O_RDONLY);
if (fd < 0) { perror("open R"); return 3; }
char buf[10];
memset(buf, 0, sizeof(buf));
ssize_t r = read(fd, buf, sizeof(buf));
if (r < 0) { perror("read"); return 4; }
printf("read: %zd bytes: %.*s\n", r, (int)r, buf);
char buf2[512];
memset(buf2, 0, sizeof(buf2));
ssize_t r2 = read(fd, buf2, sizeof(buf2));
if (r2 < 0) { perror("read"); return 4; }
printf("read: %zd bytes: %.*s\n", r2, (int)r2, buf2);
close(fd);
if (unlink(path) != 0) { perror("unlink"); return 5; }
printf("unlink: ok\n");
return 0;
}
/* ------------------------------------------------------------------ */
/* Test 2: lseek */
/* ------------------------------------------------------------------ */
static int test_lseek(const char *path)
{
printf("\n=== test_lseek ===\n");
int fd = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd < 0) { perror("open"); return 1; }
/* 写入 26 个字母 */
const char *alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
if (write(fd, alpha, 26) != 26) { perror("write"); return 2; }
printf("write 26 bytes: %s\n", alpha);
/* SEEK_SET: 跳到第 0 字节，读 5 个 */
off_t pos = lseek(fd, 0, SEEK_SET);
printf("lseek SEEK_SET 0 -> %ld\n", (long)pos);
char buf[32] = {0};
ssize_t r = read(fd, buf, 5);
printf("read 5 bytes: %.*s (expect: ABCDE)\n", (int)r, buf);
/* SEEK_CUR: 从当前位置（5）再向前跳 3 个，应读到第 8 字节 'I' */
pos = lseek(fd, 3, SEEK_CUR);
printf("lseek SEEK_CUR +3 -> %ld\n", (long)pos);
memset(buf, 0, sizeof(buf));
r = read(fd, buf, 5);
printf("read 5 bytes: %.*s (expect: IJKLM)\n", (int)r, buf);
/* SEEK_END: 从文件尾往回 5 字节，读到最后 5 个字母 */
pos = lseek(fd, -5, SEEK_END);
printf("lseek SEEK_END -5 -> %ld\n", (long)pos);
memset(buf, 0, sizeof(buf));
r = read(fd, buf, 10); /* 最多只剩 5 字节 */
printf("read %zd bytes: %.*s (expect: VWXYZ)\n", r, (int)r, buf);
/* SEEK_SET 超过文件末尾：写一个字节，制造"空洞" */
pos = lseek(fd, 30, SEEK_SET);
printf("lseek SEEK_SET 30 -> %ld\n", (long)pos);
if (write(fd, "!", 1) != 1) { perror("write hole"); return 3; }
/* 重新读回空洞区域，[26,29] 应为 0x00 */
lseek(fd, 26, SEEK_SET);
memset(buf, 0xAA, sizeof(buf));
r = read(fd, buf, 5);
printf("read hole+1: %zd bytes, hole[0]=%02X hole[1]=%02X hole[2]=%02X "
"hole[3]=%02X last='%c' (expect: 00 00 00 00 '!')\n",
r, (unsigned char)buf[0], (unsigned char)buf[1],
(unsigned char)buf[2], (unsigned char)buf[3], buf[4]);
close(fd);
unlink(path);
return 0;
}
/* ------------------------------------------------------------------ */
/* Test 3: 同一文件被两个 fd 同时打开（一读一写） */
/* ------------------------------------------------------------------ */
static int test_dual_open_same_file(const char *path)
{
printf("\n=== test_dual_open_same_file ===\n");
/* 先创建并写入初始内容 */
int fd_init = open(path, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_init < 0) { perror("open init"); return 1; }
const char *init = "0123456789";
if (write(fd_init, init, 10) != 10) { perror("write init"); return 2; }
close(fd_init);
/* 用写句柄和读句柄分别打开同一文件 */
int fd_w = open(path, O_WRONLY);
if (fd_w < 0) { perror("open W"); return 3; }
int fd_r = open(path, O_RDONLY);
if (fd_r < 0) { perror("open R"); return 4; }
printf("fd_w=%d fd_r=%d\n", fd_w, fd_r);
/* 通过写句柄覆写前 5 字节 */
if (write(fd_w, "HELLO", 5) != 5) { perror("write"); return 5; }
printf("write via fd_w: HELLO (overwrite first 5 bytes)\n");
/* 通过读句柄从头读回全部内容 */
char buf[32] = {0};
lseek(fd_r, 0, SEEK_SET);
ssize_t r = read(fd_r, buf, sizeof(buf));
printf("read via fd_r: %zd bytes: %.*s (expect: HELLO56789)\n",
r, (int)r, buf);
/* 继续用写句柄追加 */
lseek(fd_w, 0, SEEK_END);
if (write(fd_w, "!!!", 3) != 3) { perror("write append"); return 6; }
printf("write append via fd_w: !!!\n");
/* 读句柄读追加部分 */
lseek(fd_r, 10, SEEK_SET);
memset(buf, 0, sizeof(buf));
r = read(fd_r, buf, sizeof(buf));
printf("read appended via fd_r: %zd bytes: %.*s (expect: !!!)\n",
r, (int)r, buf);
close(fd_w);
close(fd_r);
unlink(path);
return 0;
}
/* ------------------------------------------------------------------ */
/* Test 4: 两个不同文件同时打开，分别读写 */
/* ------------------------------------------------------------------ */
static int test_two_files(const char *path_a, const char *path_b)
{
printf("\n=== test_two_files ===\n");
int fd_a = open(path_a, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_a < 0) { perror("open A"); return 1; }
int fd_b = open(path_b, O_CREAT | O_RDWR | O_TRUNC, 0644);
if (fd_b < 0) { perror("open B"); return 2; }
printf("fd_a=%d fd_b=%d\n", fd_a, fd_b);
/* 分别写入不同内容 */
const char *data_a = "File-A: Hello World!";
const char *data_b = "File-B: Goodbye World!";
if (write(fd_a, data_a, strlen(data_a)) < 0) { perror("write A"); return 3; }
if (write(fd_b, data_b, strlen(data_b)) < 0) { perror("write B"); return 4; }
printf("write A: %s\n", data_a);
printf("write B: %s\n", data_b);
/* 各自 seek 回头读取，验证内容互不干扰 */
lseek(fd_a, 0, SEEK_SET);
lseek(fd_b, 0, SEEK_SET);
char buf_a[64] = {0};
char buf_b[64] = {0};
ssize_t r_a = read(fd_a, buf_a, sizeof(buf_a));
ssize_t r_b = read(fd_b, buf_b, sizeof(buf_b));
printf("read A: %zd bytes: %.*s\n", r_a, (int)r_a, buf_a);
printf("read B: %zd bytes: %.*s\n", r_b, (int)r_b, buf_b);
int ok = 1;
if (strncmp(buf_a, data_a, strlen(data_a)) != 0) {
printf("FAIL: A content mismatch!\n"); ok = 0;
}
if (strncmp(buf_b, data_b, strlen(data_b)) != 0) {
printf("FAIL: B content mismatch!\n"); ok = 0;
}
if (ok) printf("PASS: both files read back correctly\n");
/* 交叉写：向 A 追加，向 B 中段覆写，再各自读回验证 */
lseek(fd_a, 0, SEEK_END);
write(fd_a, "[A-TAIL]", 8);
lseek(fd_b, 8, SEEK_SET); /* "File-B: " 之后 */
write(fd_b, "Hi! ", 7); /* 覆写 "Goodbye" */
lseek(fd_a, 0, SEEK_SET);
lseek(fd_b, 0, SEEK_SET);
memset(buf_a, 0, sizeof(buf_a));
memset(buf_b, 0, sizeof(buf_b));
r_a = read(fd_a, buf_a, sizeof(buf_a));
r_b = read(fd_b, buf_b, sizeof(buf_b));
printf("after cross-write:\n");
printf(" A: %.*s\n", (int)r_a, buf_a);
printf(" B: %.*s\n", (int)r_b, buf_b);
close(fd_a);
close(fd_b);
unlink(path_a);
unlink(path_b);
return 0;
}
static int test_write_file(const char *path)
{
printf("\n=== test_write_file ===\n");
int fd = open(path, O_CREAT | O_RDWR, 0644);
if (fd < 0) { perror("open"); return 1; }
printf("open: %s fd=%d\n", path, fd);
const char *msg = "Hello, zvfs!";
ssize_t w = write(fd, msg, strlen(msg));
if (w < 0) { perror("write"); close(fd); return 2; }
printf("write: %zd bytes: %s\n", w, msg);
close(fd);
printf("close: ok\n");
return 0;
}
static int test_read_delete_file(const char *path)
{
printf("\n=== test_read_delete_file ===\n");
int fd = open(path, O_RDONLY);
if (fd < 0) { perror("open"); return 1; }
printf("open: %s fd=%d\n", path, fd);
char buf[256] = {0};
ssize_t r = read(fd, buf, sizeof(buf));
if (r < 0) { perror("read"); close(fd); return 2; }
printf("read: %zd bytes: %.*s\n", r, (int)r, buf);
close(fd);
printf("close: ok\n");
if (unlink(path) != 0) { perror("unlink"); return 3; }
printf("unlink: ok\n");
return 0;
}
/* ------------------------------------------------------------------ */
/* main */
/* ------------------------------------------------------------------ */
int main(int argc, char **argv)
{
int rc = 0;
char path[256];
char path_a[256];
char path_b[256];
if(argc >= 2){
sprintf(path, "%s/file.dat", argv[1]);
sprintf(path_a, "%s/file_a.dat", argv[1]);
sprintf(path_b, "%s/file_a.dat", argv[1]);
}else {
sprintf(path, "/tmp/test.dat");
}
if(argc == 3){
int choose = atoi(argv[2]);
if(choose == 0){
rc = test_write_file(path);
}else if(choose == 1){
rc = test_read_delete_file(path);
}
return rc;
}
// printf("argv[0]: %s\n", argv[0]);
// printf("argv[1]: %s\n", argv[1]);
// printf("path_a: %s\n", path_a);
// printf("path_b: %s\n", path_b);
// rc |= test_basic(path);
// rc |= test_lseek(path);
// rc |= test_dual_open_same_file(path);
// rc |= test_two_files(path_a, path_b);
// rc |= test_single_file_perf(path);
// rc |= test_single_file_random_perf(path);
rc |= test_single_file_random_noaligned_perf(path);
printf("\n=== all tests %s ===\n", rc == 0 ? "PASSED" : "FAILED");
return rc;
}

816
zvfs/zvfs.c
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File diff suppressed because it is too large Load Diff

5
zvfs/zvfs.h Normal file → Executable file
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@@ -48,6 +48,8 @@ typedef struct zvfs_s {
uint32_t magic; // 0x5A563146 (ZV1F) uint32_t magic; // 0x5A563146 (ZV1F)
uint32_t version; // 1 uint32_t version; // 1
bool bs_dev_owned;
int op_errno;
bool finished; bool finished;
} zvfs_t; } zvfs_t;
@@ -72,6 +74,7 @@ typedef struct zvfs_file_s {
int aligned; int aligned;
size_t io_count; size_t io_count;
int op_errno;
bool finished; bool finished;
} zvfs_file_t; } zvfs_file_t;
@@ -95,4 +98,4 @@ int close(int fd);
int unlink(const char *name); int unlink(const char *name);
off_t lseek(int fd, off_t offset, int whence); off_t lseek(int fd, off_t offset, int whence);
#endif #endif

0
zvfs/zvfs.json Normal file → Executable file
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0
zvfs/zvfs.old/zvfs.json Normal file → Executable file
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0
zvfs/zvfs.old/zvfs.old.c Normal file → Executable file
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0
zvfs/zvfs_hook.c Normal file → Executable file
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