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Support PR_SET/GET_CHILD_SUBREAPER for sys_prctl

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This commit is contained in:
Chen Chengjun
2025-03-03 17:02:08 +08:00
committed by Tate, Hongliang Tian
parent 0903457be3
commit 801eac9386
4 changed files with 147 additions and 10 deletions
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19
kernel/src/syscall/prctl.rs
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@ -80,6 +80,19 @@ pub fn sys_prctl(
thread_name.set_name(&new_thread_name)?;
}
}
PrctlCmd::PR_SET_CHILD_SUBREAPER(is_set) => {
let process = ctx.process;
if is_set {
process.set_child_subreaper();
} else {
process.unset_child_subreaper();
}
}
PrctlCmd::PR_GET_CHILD_SUBREAPER(write_addr) => {
let process = ctx.process;
ctx.user_space()
.write_val(write_addr, &(process.is_child_subreaper() as u32))?;
}
_ => todo!(),
}
Ok(SyscallReturn::Return(0))
@ -95,6 +108,8 @@ const PR_SET_NAME: i32 = 15;
const PR_GET_NAME: i32 = 16;
const PR_SET_TIMERSLACK: i32 = 29;
const PR_GET_TIMERSLACK: i32 = 30;
const PR_SET_CHILD_SUBREAPER: i32 = 36;
const PR_GET_CHILD_SUBREAPER: i32 = 37;
#[expect(non_camel_case_types)]
#[derive(Debug, Clone, Copy)]
@ -111,6 +126,8 @@ pub enum PrctlCmd {
PR_GET_TIMERSLACK,
PR_SET_DUMPABLE(Dumpable),
PR_GET_DUMPABLE,
PR_SET_CHILD_SUBREAPER(bool),
PR_GET_CHILD_SUBREAPER(Vaddr),
}
#[repr(u64)]
@ -137,6 +154,8 @@ impl PrctlCmd {
PR_SET_TIMERSLACK => todo!(),
PR_GET_KEEPCAPS => Ok(PrctlCmd::PR_GET_KEEPCAPS),
PR_SET_KEEPCAPS => Ok(PrctlCmd::PR_SET_KEEPCAPS(arg2 as _)),
PR_SET_CHILD_SUBREAPER => Ok(PrctlCmd::PR_SET_CHILD_SUBREAPER(arg2 > 0)),
PR_GET_CHILD_SUBREAPER => Ok(PrctlCmd::PR_GET_CHILD_SUBREAPER(arg2 as _)),
_ => {
debug!("prctl cmd number: {}", option);
return_errno_with_message!(Errno::EINVAL, "unsupported prctl command");