函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\kcmp.c Create Date:2022-07-27 11:36:35
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：The caller must have pinned the task

函数原型：static struct file *get_file_raw_ptr(struct task_struct *task, unsigned int idx)

返回类型：struct file

参数：

类型参数名称
struct task_struct *task
unsigned intidx
64  struct file * file = NULL
66  Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring* subscriptions and synchronises with wait4(). Also used in procfs. Also* pins the final release of task.io_context. Also protects ->cpuset and* ->cgroup.subsys[]. And ->vfork_done.
67  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
69  如果打开文件信息则file等于fcheck_files(打开文件信息, idx)
72  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
73  task_unlock(task)
75  返回:file
调用者
名称描述
kcmp_epoll_target
SYSCALL_DEFINE5