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