这段代码定义了一个名为nvme_scan_work的函数,该函数会在工作队列中执行。这个函数是用来执行NVMe命名空间的扫描操作。以下是函数的主要步骤: 通过container_of宏从传递给函数的工作结构体(work_struct)中获取到对应的nvme_ctrl结构体指针ctrl。 检查控制器的状态是否为NVME_CTRL_LIVE(控制器正在运行)并且是否有有效...
创建完blk_mq_tag_set后,通过运行nvme_scan_work创建nvme_ns,nvme_ns包含struct gendisk接口,表示一个通用数据存储盘。同时用已经创建的blk_mq_tag_set创建一个io请求队列request_queue。 pci.c相关代码: static void nvme_reset_work(struct work_struct *work) { struct nvme_dev *dev = container_of(work...
INIT_WORK(&ctrl->scan_work, nvme_scan_work) nvme_init_non_mdts_limits nvme_scan_ns_list -> 扫描命名空间列表: , 驱动架构分析: https://zhuanlan.zhihu.com/p/590851852, nvme_reset_work, 这个函数初始化nvme盘的admin和io队列(struct nvme_queue),同时初始化nvme盘的管理队列和请求队列对应的硬件队...
l  下面这个输出的调用栈如下,通过nvme_scan_work来扫到设备。<4>[ 8.362018] device_add+0x165/0x610<4>[ 8.362021] device_create_groups_vargs+0xd3/0x100<4>[ 8.362024] device_create_vargs+0x17/0x20<4>[ 8.362028] bdi_register_va.part.16+0x23/0x180...
现在,我们还存储 NVMe 合规版本的缓存副本以及控制器是否连接到子系统或不在通用控制器结构中的标志 INIT_LIST_HEAD(&ctrl->namespaces) -> 初始命名空间链表 init_rwsem(&ctrl->namespaces_rwsem) INIT_WORK(&ctrl->scan_work, nvme_scan_work) nvme_init_non_mdts_limits nvme_scan_ns_list -> 扫描命名...
Scan(K1, K2),返回从K1到K2之间所有的keys-values. 2. 磁盘数据结构 KVell为了避免磁盘空间的碎片化,每一个写入的k/v请求都会按照其大小写入到不同的文件中,比如1K的kv对会写入到1K的文件中,200B的kv对会写入到专门存储200B的文件中。只不过最后的数据访问都是以磁盘page(一般的nvme-ssd默认是4K)为粒度进行...
Scan this computer Select your computer Scan this computer Select your computer Additional resources How to Format a Solid State Drive 28-February-2025 Considering formatting your solid state drive? Discover how to format or reformat an SSD, as well as some handy tips and tricks with Crucial’s...
nvme_queue_scan(ctrl);return0;default:return-ENOTTY; } } 对于ssd的读写命令,显然是要走 NVME_IOCTL_IO_CMD这一分支,该分支的函数主要做的事情是填充了nvme_command c命令: staticintnvme_user_cmd(structnvme_ctrl *ctrl,structnvme_ns *ns,structnvme_passthru_cmd __user *ucmd) ...
Scan this computer Select your computer Additional resources How to Format a Solid State Drive 28-February-2025 Considering formatting your solid state drive? Discover how to format or reformat an SSD, as well as some handy tips and tricks with Crucial’s quick guide. ...
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