ipc_valid_object

函数名称：pc_valid_object() - helper to sort out IPC_RMID races for codepaths* where the respective ipc_ids.rwsem is not being held down.* Checks whether the ipc object is still around or if it's gone already, as

函数原型：static inline bool ipc_valid_object(struct kern_ipc_perm *perm)

返回类型：bool

参数：

类型	参数	名称
struct kern_ipc_perm *	perm

**调用者**
名称	描述
msgctl_stat
do_msgsnd
do_msgrcv
semctl_stat
semctl_setval
semctl_main
find_alloc_undo	d_alloc_undo - lookup (and if not present create) undo array@ns: namespace@semid: semaphore array id* The function looks up (and if not present creates) the undo structure.* The size of the undo structure depends on the size of the semaphore
do_semtimedop
exit_sem	add semadj values to semaphores, free undo structures
shm_lock	shm_lock_(check_) routines are called in the paths where the rwsem* is not necessarily held.
shmctl_stat
shmctl_do_lock
do_shmat	Fix shmaddr, allocate descriptor, map shm, add attach descriptor to lists.* NOTE! Despite the name, this is NOT a direct system call entrypoint. The* "raddr" thing points to kernel space, and there has to be a wrapper around* this.

函数逻辑报告