Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\mqueue.c Create Date:2022-07-28 16:51:01
Last Modify:2020-03-17 23:00:47 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:The next function is only to split too long sys_mq_timedsend

Proto:static void __do_notify(struct mqueue_inode_info *info)

Type:void

Parameter:

TypeParameterName
struct mqueue_inode_info *info
710  If notify_owner && number of messages currently queued == 1 Then
714  Case sigev_notify == her notification: meaningless
715  Break
716  Case sigev_notify == ify via signal
719  clear_siginfo( & sig_i)
720  si_signo = sigev_signo
721  si_errno = 0
722  si_code = sent by real time mesq state change
723  si_value = sigev_value
725  _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
726  si_pid = task_tgid_nr_ns(current process, s_of_pid() returns the pid namespace in which the specified pid was* allocated.* NOTE:* ns_of_pid() is expected to be called for a process (task) that has* an attached 'struct pid' (see attach_pid(), detach_pid()) i.e @pid* is expected to be non-NULL)
728  si_uid = m_kuid_munged - Create a uid from a kuid user-namespace pair.*@targ: The user namespace we want a uid in.*@kuid: The kernel internal uid to start with.* Map @kuid into the user-namespace specified by @targ and* return the resulting uid.
729  _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()
731  kill_pid_info(sigev_signo, & sig_i, notify_owner)
733  Break
734  Case sigev_notify == deliver via thread creation
735  set_cookie(notify_cookie, NOTIFY_WOKENUP)
736  netlink_sendskb(notify_sock, notify_cookie)
737  Break
740  put_pid(notify_owner)
741  put_user_ns(notify_user_ns)
742  notify_owner = NULL
743  notify_user_ns = NULL
745  wake_up( & wait_q)
Caller
NameDescribe
do_mq_timedsend