函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\util.c Create Date:2022-07-27 18:15:04
Last Modify:2022-05-23 18:05:07 Copyright©Brick
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函数名称：pcget_public - get an ipc object or create a new one*@ns: ipc namespace*@ids: ipc identifier set*@ops: the actual creation routine to call*@params: its parameters* This routine is called by sys_msgget, sys_semget() and sys_shmget()

函数原型：static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids, const struct ipc_ops *ops, struct ipc_params *params)

返回类型：int

参数：

类型参数名称
struct ipc_namespace *ns
struct ipc_ids *ids
const struct ipc_ops *ops
struct ipc_params *params
400  flg等于flg
407  lock for writing
408  ipcp等于pc_findkey - find a key in an ipc identifier set*@ids: ipc identifier set*@key: key to find* Returns the locked pointer to the ipc structure if found or NULL* otherwise. If key is found ipc points to the owning ipc structure* Called with writer ipc_ids
409  如果(ipcp == NULL)则
411  如果非flg按位与create if key is nonexistent 的值则err等于负ENOENT
413  否则err等于getnew(ns, params)
415  否则
418  如果flg按位与create if key is nonexistent 且flg按位与ail if key exists 则err等于负EEXIST
420  否则
421  err等于0
422  如果more_checks则err等于more_checks(ipcp, params)
424  如果非err则err等于pc_check_perms - check security and permissions for an ipc object*@ns: ipc namespace*@ipcp: ipc permission set*@ops: the actual security routine to call*@params: its parameters* This routine is called by sys_msgget(), sys_semget() and sys_shmget()* when
431  ipc_unlock(ipcp)
433  lease a write lock
435  返回:err
调用者
名称描述
ipcgetpcget - Common sys_*get() code*@ns: namespace*@ids: ipc identifier set*@ops: operations to be called on ipc object creation, permission checks* and further checks*@params: the parameters needed by the previous operations.