根据文件描述符获取文件路径主要是从task_struct中取得文件的dentry和文件所在文件系统vfsmount #ifLINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)base_path= current->files->fdt->fd[fd]->f_path;#elsebase_dp= current->files->fdt->fd[fd]->f_path.dentry; vfsmnt_ptr= current->files->fdt->fd[...
linux多路径multipath, 允许将客户主机端与后端存储引擎或存储阵列之间的多个物理连接组合成一个虚拟设备, 这样做可以为您的存储提供更具弹性的连接(即断开的路径不会妨碍其他连接),或者聚合存储带宽以提高性能. 本文梳理了路径故障时的内核和相关组件处理流程及源码分析, 如下图 多路径故障流程图 fail_path路径故障简...
kpatch-build 产生hot patch。 通过对比包含patch和不包含patch的kernel差异,产生hotpatch。 hot patch module 内核模块文件:包含替换函数和源函数的元数据。 kpatch core module 内核模块文件,提供注册新函数的功能。利用内核kernel ftrace subsystem通过钩子将原函数进行重定向。 kpatch utility 管理热patch。可以配置在启...
static char tracing_mnt[PATH_MAX] = "/sys/kernel/debug"; static char tracing_path[PATH_MAX] = "/sys/kernel/debug/tracing"; static char tracing_events_path[PATH_MAX] = "/sys/kernel/debug/tracing/events"; static char tracing_path[PATH_MAX] = "/sys/kernel/tracing"; static char tracing...
对linux编译模块make -C path_to_kernel_src M=`pwd` modules的理解,这篇文章侧重点在M=`pwd`的个人理解,不足之处希望大神斧正,谢谢。 一直以为M=`pwd`是make的参数
In the context of paving the way towards quantifying the risks caused by software malfunction and, hence, towards the safety-compliance of next-generation safety-related systems, this paper studies and provides a method to estimate the probability of Linux kernel execution paths that remain ...
This is because snd_hda_activate_path() turns on path->active flag at the end of the function while the path power management is done before that. Then it's regarded as if nothing is active, and the driver turns off the power. The fix is simply to set the flag at the beginning of...
To check whether the UltraPath-NVMe kernel module is successfully loaded, perform the following steps: Procedure Run the lsmod | grep ultrapath command. Check the command output. If ultrapath and ultrapath_a are displayed in the command output, the UltraPath-NVMe kernel mo...
使用--kernel-source-path命令行选项指定内核源文件路径: 如果你知道内核源文件已经正确安装,但是系统仍然无法自动找到它们,你可以在编译内核模块或执行其他需要内核源代码的操作时,使用 --kernel-source-path 命令行选项来指定内核源文件的路径。例如: bash make --kernel-source-path=/usr/src/kernels/$(uname -...
In case rhashtable_lookup_insert_fast() fails inside vxlan_vni_add(), the allocated percpu vni stats are not freed on the error path. Introduce vxlan_vni_free() which would work as a nice wrapper to free vxlan_vni_node resources properly. Found by Linux Verification Center (linuxtesting...