函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\shm.c Create Date:2022-07-27 18:21:46
Last Modify:2020-03-17 22:58:32 Copyright©Brick
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函数名称：shm_obtain_object_check

函数原型：static inline struct shmid_kernel *shm_obtain_object_check(struct ipc_namespace *ns, int id)

返回类型：struct shmid_kernel

参数：

类型参数名称
struct ipc_namespace *ns
intid
168  ipcp等于pc_obtain_object_check*@ids: ipc identifier set*@id: ipc id to look for* Similar to ipc_obtain_object_idr() but also checks the ipc object* sequence number.* Call inside the RCU critical section.* The ipc object is *not* locked on exit.
170  如果是错误则返回:错误指示
173  返回:container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(ipcp, structshmid_kernel, shm_perm)
调用者
名称描述
shmctl_stat
shmctl_do_lock
do_shmatFix 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.