X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=kernel%2Fvserver%2Fhelper.c;h=60f570fa152ba5c14270fb23f873aee4277ea646;hb=refs%2Fheads%2Fvserver;hp=023bbee640c9436ef2110c4aadd590764aa4826e;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git

diff --git a/kernel/vserver/helper.c b/kernel/vserver/helper.c
index 023bbee64..60f570fa1 100644
--- a/kernel/vserver/helper.c
+++ b/kernel/vserver/helper.c
@@ -3,19 +3,19 @@
  *
  *  Virtual Context Support
  *
- *  Copyright (C) 2004  Herbert Pötzl
+ *  Copyright (C) 2004-2007  Herbert Pötzl
  *
  *  V0.01  basic helper
  *
  */
 
-#include <linux/config.h>
 #include <linux/errno.h>
-#include <linux/reboot.h>
 #include <linux/kmod.h>
-#include <linux/vserver.h>
-#include <linux/vs_base.h>
+#include <linux/sched.h>
+#include <linux/reboot.h>
 #include <linux/vs_context.h>
+#include <linux/vs_network.h>
+#include <linux/vserver/signal.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -24,6 +24,22 @@
 char vshelper_path[255] = "/sbin/vshelper";
 
 
+static int do_vshelper(char *name, char *argv[], char *envp[], int sync)
+{
+	int ret;
+
+	if ((ret = call_usermodehelper(name, argv, envp, sync))) {
+		printk(	KERN_WARNING
+			"%s: (%s %s) returned %s with %d\n",
+			name, argv[1], argv[2],
+			sync?"sync":"async", ret);
+	}
+	vxdprintk(VXD_CBIT(switch, 4),
+		"%s: (%s %s) returned %s with %d",
+		name, argv[1], argv[2], sync?"sync":"async", ret);
+	return ret;
+}
+
 /*
  *      vshelper path is set via /proc/sys
  *      invoked by vserver sys_reboot(), with
@@ -32,23 +48,26 @@ char vshelper_path[255] = "/sbin/vshelper";
  *      argv [0] = vshelper_path;
  *      argv [1] = action: "restart", "halt", "poweroff", ...
  *      argv [2] = context identifier
- *      argv [3] = additional argument (restart2)
  *
  *      envp [*] = type-specific parameters
  */
 
-long vs_reboot(unsigned int cmd, void * arg)
+long vs_reboot_helper(struct vx_info *vxi, int cmd, void __user *arg)
 {
-	char id_buf[8], cmd_buf[32];
-	char uid_buf[32], pid_buf[32];
-	char buffer[256];
+	char id_buf[8], cmd_buf[16];
+	char uid_buf[16], pid_buf[16];
+	int ret;
 
-	char *argv[] = {vshelper_path, NULL, id_buf, NULL, 0};
+	char *argv[] = {vshelper_path, NULL, id_buf, 0};
 	char *envp[] = {"HOME=/", "TERM=linux",
 			"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
 			uid_buf, pid_buf, cmd_buf, 0};
 
-	snprintf(id_buf, sizeof(id_buf)-1, "%d", vx_current_xid());
+	if (vx_info_state(vxi, VXS_HELPER))
+		return -EAGAIN;
+	vxi->vx_state |= VXS_HELPER;
+
+	snprintf(id_buf, sizeof(id_buf)-1, "%d", vxi->vx_id);
 
 	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
 	snprintf(uid_buf, sizeof(uid_buf)-1, "VS_UID=%d", current->uid);
@@ -71,22 +90,119 @@ long vs_reboot(unsigned int cmd, void * arg)
 		argv[1] = "swsusp";
 		break;
 
-	case LINUX_REBOOT_CMD_RESTART2:
-		if (strncpy_from_user(&buffer[0], (char *)arg, sizeof(buffer) - 1) < 0)
-			return -EFAULT;
-		argv[3] = buffer;
 	default:
-		argv[1] = "restart2";
-		break;
+		vxi->vx_state &= ~VXS_HELPER;
+		return 0;
 	}
 
-	/* maybe we should wait ? */
-	if (call_usermodehelper(*argv, argv, envp, 0)) {
-		printk( KERN_WARNING
-			"vs_reboot(): failed to exec (%s %s %s %s)\n",
-			vshelper_path, argv[1], argv[2], argv[3]);
-		return -EPERM;
+#ifndef CONFIG_VSERVER_LEGACY
+	ret = do_vshelper(vshelper_path, argv, envp, 1);
+#else
+	ret = do_vshelper(vshelper_path, argv, envp, 0);
+#endif
+	vxi->vx_state &= ~VXS_HELPER;
+	__wakeup_vx_info(vxi);
+	return (ret) ? -EPERM : 0;
+}
+
+
+long vs_reboot(unsigned int cmd, void __user * arg)
+{
+	struct vx_info *vxi = current->vx_info;
+	long ret = 0;
+
+	vxdprintk(VXD_CBIT(misc, 5),
+		"vs_reboot(%p[#%d],%d)",
+		vxi, vxi?vxi->vx_id:0, cmd);
+
+	ret = vs_reboot_helper(vxi, cmd, arg);
+	if (ret)
+		return ret;
+
+	vxi->reboot_cmd = cmd;
+	if (vx_info_flags(vxi, VXF_REBOOT_KILL, 0)) {
+		switch (cmd) {
+		case LINUX_REBOOT_CMD_RESTART:
+		case LINUX_REBOOT_CMD_HALT:
+		case LINUX_REBOOT_CMD_POWER_OFF:
+			vx_info_kill(vxi, 0, SIGKILL);
+			vx_info_kill(vxi, 1, SIGKILL);
+		default:
+			break;
+		}
 	}
 	return 0;
 }
 
+
+/*
+ *      argv [0] = vshelper_path;
+ *      argv [1] = action: "startup", "shutdown"
+ *      argv [2] = context identifier
+ *
+ *      envp [*] = type-specific parameters
+ */
+
+long vs_state_change(struct vx_info *vxi, unsigned int cmd)
+{
+	char id_buf[8], cmd_buf[16];
+	char *argv[] = {vshelper_path, NULL, id_buf, 0};
+	char *envp[] = {"HOME=/", "TERM=linux",
+			"PATH=/sbin:/usr/sbin:/bin:/usr/bin", cmd_buf, 0};
+
+	if (!vx_info_flags(vxi, VXF_SC_HELPER, 0))
+		return 0;
+
+	snprintf(id_buf, sizeof(id_buf)-1, "%d", vxi->vx_id);
+	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
+
+	switch (cmd) {
+	case VSC_STARTUP:
+		argv[1] = "startup";
+		break;
+	case VSC_SHUTDOWN:
+		argv[1] = "shutdown";
+		break;
+	default:
+		return 0;
+	}
+
+	return do_vshelper(vshelper_path, argv, envp, 1);
+}
+
+
+/*
+ *      argv [0] = vshelper_path;
+ *      argv [1] = action: "netup", "netdown"
+ *      argv [2] = context identifier
+ *
+ *      envp [*] = type-specific parameters
+ */
+
+long vs_net_change(struct nx_info *nxi, unsigned int cmd)
+{
+	char id_buf[8], cmd_buf[16];
+	char *argv[] = {vshelper_path, NULL, id_buf, 0};
+	char *envp[] = {"HOME=/", "TERM=linux",
+			"PATH=/sbin:/usr/sbin:/bin:/usr/bin", cmd_buf, 0};
+
+	if (!nx_info_flags(nxi, NXF_SC_HELPER, 0))
+		return 0;
+
+	snprintf(id_buf, sizeof(id_buf)-1, "%d", nxi->nx_id);
+	snprintf(cmd_buf, sizeof(cmd_buf)-1, "VS_CMD=%08x", cmd);
+
+	switch (cmd) {
+	case VSC_NETUP:
+		argv[1] = "netup";
+		break;
+	case VSC_NETDOWN:
+		argv[1] = "netdown";
+		break;
+	default:
+		return 0;
+	}
+
+	return do_vshelper(vshelper_path, argv, envp, 1);
+}
+