2 * linux/kernel/vserver/legacy.c
4 * Virtual Server: Legacy Funtions
6 * Copyright (C) 2001-2003 Jacques Gelinas
7 * Copyright (C) 2003-2005 Herbert Pƶtzl
9 * V0.01 broken out from vcontext.c V0.05
13 #include <linux/sched.h>
14 #include <linux/vs_context.h>
15 #include <linux/vs_network.h>
16 #include <linux/vserver/legacy.h>
17 #include <linux/vserver/namespace.h>
18 #include <linux/namespace.h>
20 #include <asm/errno.h>
21 #include <asm/uaccess.h>
24 extern int vx_set_init(struct vx_info *, struct task_struct *);
26 static int vx_set_initpid(struct vx_info *vxi, int pid)
28 struct task_struct *init;
30 init = find_task_by_real_pid(pid);
33 return vx_set_init(vxi, init);
36 int vc_new_s_context(uint32_t ctx, void __user *data)
39 struct vcmd_new_s_context_v1 vc_data;
40 struct vx_info *new_vxi;
42 if (copy_from_user(&vc_data, data, sizeof(vc_data)))
45 /* legacy hack, will be removed soon */
47 /* assign flags and initpid */
48 if (!current->vx_info)
51 if (vc_data.flags & VX_INFO_INIT)
52 ret = vx_set_initpid(current->vx_info, current->tgid);
54 /* We keep the same vx_id, but lower the capabilities */
55 current->vx_info->vx_bcaps &= (~vc_data.remove_cap);
56 ret = vx_current_xid();
57 current->vx_info->vx_flags |= vc_data.flags;
62 if (!vx_check(0, VX_ADMIN) || !capable(CAP_SYS_ADMIN)
63 /* might make sense in the future, or not ... */
64 || vx_flags(VX_INFO_LOCK, 0))
67 /* ugly hack for Spectator */
73 if (((ctx > MAX_S_CONTEXT) && (ctx != VX_DYNAMIC_ID)) ||
77 if ((ctx == VX_DYNAMIC_ID) || (ctx < MIN_D_CONTEXT))
78 new_vxi = lookup_or_create_vx_info(ctx);
80 new_vxi = lookup_vx_info(ctx);
86 if (!vx_info_flags(new_vxi, VXF_STATE_SETUP, 0) &&
87 vx_info_flags(new_vxi, VX_INFO_PRIVATE, 0))
90 new_vxi->vx_flags &= ~VXF_STATE_SETUP;
92 ret = vx_migrate_task(current, new_vxi);
94 current->vx_info->vx_bcaps &= (~vc_data.remove_cap);
95 new_vxi->vx_flags |= vc_data.flags;
96 if (vc_data.flags & VX_INFO_INIT)
97 vx_set_initpid(new_vxi, current->tgid);
98 if (vc_data.flags & VX_INFO_NAMESPACE)
99 vx_set_namespace(new_vxi,
100 current->namespace, current->fs);
101 if (vc_data.flags & VX_INFO_NPROC)
102 new_vxi->limit.rlim[RLIMIT_NPROC] =
103 current->signal->rlim[RLIMIT_NPROC].rlim_max;
105 /* tweak some defaults for legacy */
106 new_vxi->vx_flags |= (VXF_HIDE_NETIF|VXF_INFO_INIT);
107 ret = new_vxi->vx_id;
110 put_vx_info(new_vxi);