include/linux/vserver/context.h

   1 #ifndef _VX_CONTEXT_H
   2 #define _VX_CONTEXT_H
   3
   4 #include <linux/types.h>
   5
   6
   7 #define MAX_S_CONTEXT   65535   /* Arbitrary limit */
   8 #define MIN_D_CONTEXT   49152   /* dynamic contexts start here */
   9
  10 #define VX_DYNAMIC_ID   ((uint32_t)-1)          /* id for dynamic context */
  11
  12 /* context flags */
  13
  14 #define VXF_INFO_LOCK           0x00000001
  15 #define VXF_INFO_SCHED          0x00000002
  16 #define VXF_INFO_NPROC          0x00000004
  17 #define VXF_INFO_PRIVATE        0x00000008
  18
  19 #define VXF_INFO_INIT           0x00000010
  20 #define VXF_INFO_HIDE           0x00000020
  21 #define VXF_INFO_ULIMIT         0x00000040
  22 #define VXF_INFO_NSPACE         0x00000080
  23
  24 #define VXF_SCHED_HARD          0x00000100
  25 #define VXF_SCHED_PRIO          0x00000200
  26 #define VXF_SCHED_PAUSE         0x00000400
  27
  28 #define VXF_VIRT_MEM            0x00010000
  29 #define VXF_VIRT_UPTIME         0x00020000
  30 #define VXF_VIRT_CPU            0x00040000
  31 #define VXF_VIRT_LOAD           0x00080000
  32
  33 #define VXF_HIDE_MOUNT          0x01000000
  34 #define VXF_HIDE_NETIF          0x02000000
  35
  36 #define VXF_STATE_SETUP         (1ULL<<32)
  37 #define VXF_STATE_INIT          (1ULL<<33)
  38
  39 #define VXF_SC_HELPER           (1ULL<<36)
  40 #define VXF_REBOOT_KILL         (1ULL<<37)
  41 #define VXF_PERSISTENT          (1ULL<<38)
  42
  43 #define VXF_FORK_RSS            (1ULL<<48)
  44 #define VXF_PROLIFIC            (1ULL<<49)
  45
  46 #define VXF_IGNEG_NICE          (1ULL<<52)
  47
  48 #define VXF_ONE_TIME            (0x0003ULL<<32)
  49
  50 #define VXF_INIT_SET            (VXF_STATE_SETUP|VXF_STATE_INIT)
  51
  52
  53 /* context migration */
  54
  55 #define VXM_SET_INIT            0x00000001
  56 #define VXM_SET_REAPER          0x00000002
  57
  58 /* context caps */
  59
  60 #define VXC_CAP_MASK            0x00000000
  61
  62 #define VXC_SET_UTSNAME         0x00000001
  63 #define VXC_SET_RLIMIT          0x00000002
  64
  65 #define VXC_RAW_ICMP            0x00000100
  66 #define VXC_SYSLOG              0x00001000
  67
  68 #define VXC_SECURE_MOUNT        0x00010000
  69 #define VXC_SECURE_REMOUNT      0x00020000
  70 #define VXC_BINARY_MOUNT        0x00040000
  71
  72 #define VXC_QUOTA_CTL           0x00100000
  73
  74
  75 /* context state changes */
  76
  77 enum {
  78         VSC_STARTUP = 1,
  79         VSC_SHUTDOWN,
  80
  81         VSC_NETUP,
  82         VSC_NETDOWN,
  83 };
  84
  85
  86 #ifdef  __KERNEL__
  87
  88 #include <linux/list.h>
  89 #include <linux/spinlock.h>
  90 #include <linux/rcupdate.h>
  91
  92 #include "limit_def.h"
  93 #include "sched_def.h"
  94 #include "cvirt_def.h"
  95
  96 struct vx_info {
  97         struct hlist_node vx_hlist;             /* linked list of contexts */
  98         xid_t vx_id;                            /* context id */
  99         atomic_t vx_usecnt;                     /* usage count */
 100         atomic_t vx_tasks;                      /* tasks count */
 101         struct vx_info *vx_parent;              /* parent context */
 102         int vx_state;                           /* context state */
 103
 104         struct namespace *vx_namespace;         /* private namespace */
 105         struct fs_struct *vx_fs;                /* private namespace fs */
 106         uint64_t vx_flags;                      /* context flags */
 107         uint64_t vx_bcaps;                      /* bounding caps (system) */
 108         uint64_t vx_ccaps;                      /* context caps (vserver) */
 109
 110         struct task_struct *vx_reaper;          /* guest reaper process */
 111         pid_t vx_initpid;                       /* PID of guest init */
 112
 113         struct _vx_limit limit;                 /* vserver limits */
 114         struct _vx_sched sched;                 /* vserver scheduler */
 115         struct _vx_cvirt cvirt;                 /* virtual/bias stuff */
 116         struct _vx_cacct cacct;                 /* context accounting */
 117
 118         wait_queue_head_t vx_wait;              /* context exit waitqueue */
 119         int reboot_cmd;                         /* last sys_reboot() cmd */
 120         int exit_code;                          /* last process exit code */
 121
 122         char vx_name[65];                       /* vserver name */
 123 };
 124
 125
 126 struct vx_info_save {
 127         struct vx_info *vxi;
 128         xid_t xid;
 129 };
 130
 131
 132 /* status flags */
 133
 134 #define VXS_HASHED      0x0001
 135 #define VXS_PAUSED      0x0010
 136 #define VXS_ONHOLD      0x0020
 137 #define VXS_SHUTDOWN    0x0100
 138 #define VXS_HELPER      0x1000
 139 #define VXS_RELEASED    0x8000
 140
 141 /* check conditions */
 142
 143 #define VX_ADMIN        0x0001
 144 #define VX_WATCH        0x0002
 145 #define VX_HIDE         0x0004
 146 #define VX_HOSTID       0x0008
 147
 148 #define VX_IDENT        0x0010
 149 #define VX_EQUIV        0x0020
 150 #define VX_PARENT       0x0040
 151 #define VX_CHILD        0x0080
 152
 153 #define VX_ARG_MASK     0x00F0
 154
 155 #define VX_DYNAMIC      0x0100
 156 #define VX_STATIC       0x0200
 157
 158 #define VX_ATR_MASK     0x0F00
 159
 160
 161 extern void claim_vx_info(struct vx_info *, struct task_struct *);
 162 extern void release_vx_info(struct vx_info *, struct task_struct *);
 163
 164 extern struct vx_info *lookup_vx_info(int);
 165 extern struct vx_info *lookup_or_create_vx_info(int);
 166
 167 extern int get_xid_list(int, unsigned int *, int);
 168 extern int xid_is_hashed(xid_t);
 169
 170 extern int vx_migrate_task(struct task_struct *, struct vx_info *);
 171
 172 extern long vs_state_change(struct vx_info *, unsigned int);
 173
 174
 175 #endif  /* __KERNEL__ */
 176 #else   /* _VX_CONTEXT_H */
 177 #warning duplicate inclusion
 178 #endif  /* _VX_CONTEXT_H */