Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\fcntl.c Create Date:2022-07-28 20:05:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:sigio_perm

Proto:static inline int sigio_perm(struct task_struct *p, struct fown_struct *fown, int sig)

Type:int

Parameter:

TypeParameterName
struct task_struct *p
struct fown_struct *fown
intsig
714  _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
715  cred = __task_cred - Access a task's objective credentials*@task: The task to query* Access the objective credentials of a task. The caller must hold the RCU* readlock.* The result of this function should not be passed directly to get_cred();(p)
716  ret = ( uid_eq( uid/euid of process setting the owner , GLOBAL_ROOT_UID) || uid_eq( uid/euid of process setting the owner , saved UID of the task ) || uid_eq( uid/euid of process setting the owner , real UID of the task ) || uid_eq(uid, saved UID of the task ) || uid_eq(uid, real UID of the task )) && Not security_file_send_sigiotask(p, fown, sig)
720  _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()
721  Return ret
Caller
NameDescribe
send_sigio_to_task
send_sigurg_to_task