X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=kernel%2Fvserver%2Fsignal.c;h=c56c750200096bbcb1c54a4aa5790029d5ba8eba;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=963cc06513ebf97be645b191833cf3bb6a0fcf75;hpb=8e8ece46a861c84343256819eaec77e608ff9217;p=linux-2.6.git

diff --git a/kernel/vserver/signal.c b/kernel/vserver/signal.c
index 963cc0651..c56c75020 100644
--- a/kernel/vserver/signal.c
+++ b/kernel/vserver/signal.c
@@ -3,13 +3,14 @@
  *
  *  Virtual Server: Signal Support
  *
- *  Copyright (C) 2003-2005  Herbert Pötzl
+ *  Copyright (C) 2003-2007  Herbert Pötzl
  *
  *  V0.01  broken out from vcontext V0.05
+ *  V0.02  changed vcmds to vxi arg
+ *  V0.03  adjusted siginfo for kill
  *
  */
 
-#include <linux/config.h>
 #include <linux/sched.h>
 
 #include <asm/errno.h>
@@ -19,37 +20,28 @@
 #include <linux/vserver/signal_cmd.h>
 
 
-int vc_ctx_kill(uint32_t id, void __user *data)
+int vx_info_kill(struct vx_info *vxi, int pid, int sig)
 {
 	int retval, count=0;
-	struct vcmd_ctx_kill_v0 vc_data;
 	struct task_struct *p;
-	struct vx_info *vxi;
-	unsigned long priv = 0;
-
-	if (!vx_check(0, VX_ADMIN))
-		return -ENOSYS;
-	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
-		return -EFAULT;
-
-	vxi = locate_vx_info(id);
-	if (!vxi)
-		return -ESRCH;
+	struct siginfo *sip = SEND_SIG_PRIV;
 
 	retval = -ESRCH;
+	vxdprintk(VXD_CBIT(misc, 4),
+		"vx_info_kill(%p[#%d],%d,%d)*",
+		vxi, vxi->vx_id, pid, sig);
 	read_lock(&tasklist_lock);
-	switch (vc_data.pid) {
+	switch (pid) {
 	case  0:
-		priv = 1;
 	case -1:
 		for_each_process(p) {
 			int err = 0;
 
-			if (vx_task_xid(p) != id || p->pid <= 1 ||
-				(vc_data.pid && vxi->vx_initpid == p->pid))
+			if (vx_task_xid(p) != vxi->vx_id || p->pid <= 1 ||
+				(pid && vxi->vx_initpid == p->pid))
 				continue;
 
-			err = group_send_sig_info(vc_data.sig, (void*)priv, p);
+			err = group_send_sig_info(sig, sip, p);
 			++count;
 			if (err != -EPERM)
 				retval = err;
@@ -58,24 +50,46 @@ int vc_ctx_kill(uint32_t id, void __user *data)
 
 	case 1:
 		if (vxi->vx_initpid) {
-			vc_data.pid = vxi->vx_initpid;
-			priv = 1;
+			pid = vxi->vx_initpid;
+			/* for now, only SIGINT to private init ... */
+			if (!vx_info_flags(vxi, VXF_STATE_ADMIN, 0) &&
+				/* ... as long as there are tasks left */
+				(atomic_read(&vxi->vx_tasks) > 1))
+				sig = SIGINT;
 		}
 		/* fallthrough */
 	default:
-		p = find_task_by_real_pid(vc_data.pid);
+		p = find_task_by_real_pid(pid);
 		if (p) {
-			if ((id == -1) || (vx_task_xid(p) == id))
-				retval = group_send_sig_info(vc_data.sig,
-					(void*)priv, p);
+			if (vx_task_xid(p) == vxi->vx_id)
+				retval = group_send_sig_info(sig, sip, p);
 		}
 		break;
 	}
 	read_unlock(&tasklist_lock);
-	put_vx_info(vxi);
+	vxdprintk(VXD_CBIT(misc, 4),
+		"vx_info_kill(%p[#%d],%d,%d,%ld) = %d",
+		vxi, vxi->vx_id, pid, sig, (long)sip, retval);
 	return retval;
 }
 
+int vc_ctx_kill(struct vx_info *vxi, void __user *data)
+{
+	struct vcmd_ctx_kill_v0 vc_data;
+
+	if (copy_from_user (&vc_data, data, sizeof(vc_data)))
+		return -EFAULT;
+
+	/* special check to allow guest shutdown */
+	if (!vx_info_flags(vxi, VXF_STATE_ADMIN, 0) &&
+		/* forbid killall pid=0 when init is present */
+		(((vc_data.pid < 1) && vxi->vx_initpid) ||
+		(vc_data.pid > 1)))
+		return -EACCES;
+
+	return vx_info_kill(vxi, vc_data.pid, vc_data.sig);
+}
+
 
 static int __wait_exit(struct vx_info *vxi)
 {
@@ -86,7 +100,8 @@ static int __wait_exit(struct vx_info *vxi)
 	set_current_state(TASK_INTERRUPTIBLE);
 
 wait:
-	if (vx_info_state(vxi, VXS_SHUTDOWN|VXS_HASHED) == VXS_SHUTDOWN)
+	if (vx_info_state(vxi,
+		VXS_SHUTDOWN|VXS_HASHED|VXS_HELPER) == VXS_SHUTDOWN)
 		goto out;
 	if (signal_pending(current)) {
 		ret = -ERESTARTSYS;
@@ -103,17 +118,17 @@ out:
 
 
 
-int vc_wait_exit(uint32_t id, void __user *data)
+int vc_wait_exit(struct vx_info *vxi, void __user *data)
 {
-	struct vx_info *vxi;
+	struct vcmd_wait_exit_v0 vc_data;
 	int ret;
 
-	vxi = locate_vx_info(id);
-	if (!vxi)
-		return -ESRCH;
-
 	ret = __wait_exit(vxi);
-	put_vx_info(vxi);
+	vc_data.reboot_cmd = vxi->reboot_cmd;
+	vc_data.exit_code = vxi->exit_code;
+
+	if (copy_to_user (data, &vc_data, sizeof(vc_data)))
+		ret = -EFAULT;
 	return ret;
 }