函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\msg.c Create Date:2022-07-27 18:17:18
Last Modify:2020-03-17 22:56:56 Copyright©Brick
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函数名称：compat_ksys_msgctl

函数原型：static long compat_ksys_msgctl(int msqid, int cmd, void __user *uptr, int version)

返回类型：long

参数：

类型参数名称
intmsqid
intcmd
void __user *uptr
intversion
711  ns等于ipc_ns
713  如果msqid小于0或cmd小于0则返回:负EINVAL
717  当: & == see ipcs
718  当: & == MSG_INFO
720  err等于msgctl_info(ns, msqid, cmd, & msginfo)
721  如果err小于0则返回:err
723  如果copy_to_user(uptr, & msginfo, msginfo的长度)则err等于负EFAULT
725  返回:err
727  当: & == get ipc_perm options
728  当: & == pcs ctl commands
729  当: & == MSG_STAT_ANY
730  err等于msgctl_stat(ns, msqid, cmd, & msqid64)
731  如果err小于0则返回:err
733  如果copy_compat_msqid_to_user(uptr, & msqid64, version)则err等于负EFAULT
735  返回:err
736  当: & == set ipc_perm options
737  如果copy_compat_msqid_from_user( & msqid64, uptr, version)则返回:负EFAULT
739  返回:This function handles some msgctl commands which require the rwsem* to be held in write mode.* NOTE: no locks must be held, the rwsem is taken inside this function.
740  当: & == move resource
741  返回:This function handles some msgctl commands which require the rwsem* to be held in write mode.* NOTE: no locks must be held, the rwsem is taken inside this function.
742  默认
743  返回:负EINVAL
调用者
名称描述
COMPAT_SYSCALL_DEFINE3