96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
#ifndef __ZVFS_HOOK_H__
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#define __ZVFS_HOOK_H__
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#include <stdio.h>
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#include <spdk/event.h>
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#include <spdk/blob.h>
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#include <spdk/bdev.h>
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#include <spdk/blob_bdev.h>
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#include <spdk/env.h>
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#define ZVFS_MAX_FILES 1024
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#define ZVFS_MAX_FD 64
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#define BUFFER_SIZE (1024*8)
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extern const char *json_file;
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extern struct spdk_thread *global_thread;
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static const int WAITER_MAX_TIME = 100000;
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/* 目录项（内存中的目录） */
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typedef struct {
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char filename[256];
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spdk_blob_id blob_id;
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uint64_t file_size; // 文件逻辑大小（字节）
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uint64_t allocated_clusters; // 已分配的cluster数量
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bool is_valid; // false 表示已删除
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int32_t open_count; // 打开的文件句柄数量
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} zvfs_dirent_t;
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/* 文件系统全局结构 */
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typedef struct zvfs_s {
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struct spdk_bs_dev *bs_dev;
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struct spdk_blob_store *bs;
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struct spdk_io_channel *channel;
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struct spdk_blob *super_blob; // 承载目录日志的blob
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uint64_t io_unit_size; // page大小，单位字节
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/* 目录 */
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zvfs_dirent_t *dirents[ZVFS_MAX_FILES]; // 目录项数组 #define ZVFS_MAX_FILES 1024
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uint32_t dirent_count; // 当前有效项数
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/* 伪FD表 */
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struct zvfs_file_s *fd_table[ZVFS_MAX_FD]; // // e.g., #define ZVFS_MAX_FD 64
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int fd_base; // 伪FD起始值，如1000
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int openfd_count;
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/* 元数据 */
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uint32_t magic; // 0x5A563146 (ZV1F)
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uint32_t version; // 1
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bool finished;
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} zvfs_t;
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/* 打开的文件句柄 */
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typedef struct zvfs_file_s {
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zvfs_t *fs;
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spdk_blob_id blob_id;
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struct spdk_blob *blob;
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zvfs_dirent_t *dirent; // 指回目录项 file_size/allocated_clusters
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uint64_t current_offset; // 当前读写位置
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int flags; // O_RDONLY / O_RDWR / O_CREAT 等
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int pseudo_fd;
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/* 临时DMA缓冲区（可选：每个file一个，避免每次malloc） */
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void *dma_buf;
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uint64_t dma_buf_size;
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size_t actual_io_count;
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const uint8_t *write_staging_buf;
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size_t io_count;
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bool finished;
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} zvfs_file_t;
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bool waiter(struct spdk_thread *thread, spdk_msg_fn start_fn, void *ctx, bool *finished);
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int zvfs_env_setup(void);
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int zvfs_mount(struct zvfs_s *fs);
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int zvfs_umount(struct zvfs_s *fs);
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int zvfs_create(struct zvfs_file_s *file);
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int zvfs_open(struct zvfs_file_s *file);
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int zvfs_read(struct zvfs_file_s *file, uint8_t *buffer, size_t count);
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int zvfs_write(struct zvfs_file_s *file, const uint8_t *buffer, size_t count);
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int zvfs_close(struct zvfs_file_s *file);
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int zvfs_delete(struct zvfs_file_s *file);
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/* POSIX hook API（zvfs_hook.c 实现） */
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int open(const char *path, int flags, ...);
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ssize_t read(int fd, void *buf, size_t count);
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ssize_t write(int fd, const void *buf, size_t count);
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int close(int fd);
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int unlink(const char *name);
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#endif |