Function dfs_aspace_mmap_read

components/dfs/dfs_v2/src/dfs_pcache.c:2092–2107

* @brief Read data from memory-mapped file space * * This function handles read operations for memory-mapped file regions by * translating virtual addresses to file positions and performing the actual * read operation through dfs_aspace_read. * * @param[in] file Pointer to the file structure being mapped * @param[in] varea Pointer to the virtual memory area structure * @param[in] data

 *         0 if any parameter is invalid
 */
int dfs_aspace_mmap_read(struct dfs_file *file, struct rt_varea *varea, void *data)
{
    int ret = 0;

    if (file && varea)
    {
        struct rt_aspace_io_msg *msg = (struct rt_aspace_io_msg *)data;
        if (msg)
        {
            off_t fpos = dfs_aspace_fpos(varea, msg->fault_vaddr);
            return dfs_aspace_read(file, msg->buffer_vaddr, ARCH_PAGE_SIZE, &fpos);
        }
    }

    return ret;
}

/**
 * @brief Write data to memory-mapped file space