gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

impementation of sched_{setparam, getparam, setscheduler, getscheduler, get_priority_min, get_priority_max, rr_get_interval} system calls

Browse Source
This commit is contained in:
Balazs Gerofi
2015-02-19 11:13:13 -08:00
parent 0dee04f16b
commit 0307f6a6cc
6 changed files with 433 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
executer/kernel/syscall.c
View File

@@ -1505,6 +1505,8 @@ fail:
return error;
}
#define SCHED_CHECK_SAME_OWNER 0x01
#define SCHED_CHECK_ROOT 0x02
int __do_in_kernel_syscall(ihk_os_t os, struct mcctrl_channel *c, struct syscall_request *sc)
{
@@ -1592,6 +1594,71 @@ int __do_in_kernel_syscall(ihk_os_t os, struct mcctrl_channel *c, struct syscall
error = writecore(os, sc->args[1], sc->args[0]);
ret = 0;
break;
case __NR_sched_setparam: {
switch (sc->args[0]) {
case SCHED_CHECK_SAME_OWNER: {
const struct cred *cred = current_cred();
const struct cred *pcred;
bool match;
struct task_struct *p;
int pid = sc->args[1];
rcu_read_lock();
p = pid_task(find_get_pid(pid), PIDTYPE_PID);
if (!p) {
rcu_read_unlock();
ret = -ESRCH;
goto sched_setparam_out;
}
rcu_read_unlock();
rcu_read_lock();
pcred = __task_cred(p);
#if LINUX_VERSION_CODE > KERNEL_VERSION(3,4,0)
match = (uid_eq(cred->euid, pcred->euid) ||
uid_eq(cred->euid, pcred->uid));
#else
match = ((cred->euid == pcred->euid) ||
(cred->euid == pcred->uid));
#endif
rcu_read_unlock();
if (match) {
ret = 0;
}
else {
ret = -EPERM;
}
break;
}
case SCHED_CHECK_ROOT: {
const struct cred *cred = current_cred();
bool match;
#if LINUX_VERSION_CODE > KERNEL_VERSION(3,4,0)
match = uid_eq(cred->euid, GLOBAL_ROOT_UID);
#else
match = (cred->euid == 0);
#endif
if (match) {
ret = 0;
}
else {
ret = -EPERM;
}
break;
}
}
sched_setparam_out:
break;
}
default:
error = -ENOSYS;