kernel/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_STATE_HELPER        (1ULL<<36)
  40
  41 #define VXF_FORK_RSS            (1ULL<<48)
  42 #define VXF_PROLIFIC            (1ULL<<49)
  43
  44 #define VXF_IGNEG_NICE          (1ULL<<52)
  45
  46 #define VXF_ONE_TIME            (0x0003ULL<<32)
  47
  48 #define VXF_INIT_SET            (VXF_STATE_SETUP|VXF_STATE_INIT)
  49
  50
  51 /* context caps */
  52
  53 #define VXC_CAP_MASK            0x00000000
  54
  55 #define VXC_SET_UTSNAME         0x00000001
  56 #define VXC_SET_RLIMIT          0x00000002
  57
  58 #define VXC_RAW_ICMP            0x00000100
  59 #define VXC_SYSLOG              0x00001000
  60
  61 #define VXC_SECURE_MOUNT        0x00010000
  62 #define VXC_SECURE_REMOUNT      0x00020000
  63 #define VXC_BINARY_MOUNT        0x00040000
  64
  65 #define VXC_QUOTA_CTL           0x00100000
  66
  67
  68 /* context state changes */
  69
  70 enum {
  71         VSC_STARTUP = 1,
  72         VSC_SHUTDOWN,
  73
  74         VSC_NETUP,
  75         VSC_NETDOWN,
  76 };
  77
  78
  79 #ifdef  __KERNEL__
  80
  81 #include <linux/list.h>
  82 #include <linux/spinlock.h>
  83 #include <linux/rcupdate.h>
  84
  85 #include "limit_def.h"
  86 #include "sched_def.h"
  87 #include "cvirt_def.h"
  88
  89 struct vx_info {
  90         struct hlist_node vx_hlist;             /* linked list of contexts */
  91         xid_t vx_id;                            /* context id */
  92         atomic_t vx_usecnt;                     /* usage count */
  93         atomic_t vx_tasks;                      /* tasks count */
  94         struct vx_info *vx_parent;              /* parent context */
  95         int vx_state;                           /* context state */
  96
  97         struct namespace *vx_namespace;         /* private namespace */
  98         struct fs_struct *vx_fs;                /* private namespace fs */
  99         uint64_t vx_flags;                      /* context flags */
 100         uint64_t vx_bcaps;                      /* bounding caps (system) */
 101         uint64_t vx_ccaps;                      /* context caps (vserver) */
 102
 103         pid_t vx_initpid;                       /* PID of fake init process */
 104
 105         wait_queue_head_t vx_wait;              /* context exit waitqueue */
 106
 107         struct _vx_limit limit;                 /* vserver limits */
 108         struct _vx_sched sched;                 /* vserver scheduler */
 109         struct _vx_cvirt cvirt;                 /* virtual/bias stuff */
 110         struct _vx_cacct cacct;                 /* context accounting */
 111
 112         char vx_name[65];                       /* vserver name */
 113 };
 114
 115
 116 /* status flags */
 117
 118 #define VXS_HASHED      0x0001
 119 #define VXS_PAUSED      0x0010
 120 #define VXS_ONHOLD      0x0020
 121 #define VXS_SHUTDOWN    0x0100
 122 #define VXS_RELEASED    0x8000
 123
 124 /* check conditions */
 125
 126 #define VX_ADMIN        0x0001
 127 #define VX_WATCH        0x0002
 128 #define VX_HIDE         0x0004
 129 #define VX_HOSTID       0x0008
 130
 131 #define VX_IDENT        0x0010
 132 #define VX_EQUIV        0x0020
 133 #define VX_PARENT       0x0040
 134 #define VX_CHILD        0x0080
 135
 136 #define VX_ARG_MASK     0x00F0
 137
 138 #define VX_DYNAMIC      0x0100
 139 #define VX_STATIC       0x0200
 140
 141 #define VX_ATR_MASK     0x0F00
 142
 143
 144 extern void claim_vx_info(struct vx_info *, struct task_struct *);
 145 extern void release_vx_info(struct vx_info *, struct task_struct *);
 146
 147 extern struct vx_info *locate_vx_info(int);
 148 extern struct vx_info *locate_or_create_vx_info(int);
 149
 150 extern int get_xid_list(int, unsigned int *, int);
 151 extern int xid_is_hashed(xid_t);
 152
 153 extern int vx_migrate_task(struct task_struct *, struct vx_info *);
 154
 155 extern long vs_state_change(struct vx_info *, unsigned int);
 156
 157
 158 #endif  /* __KERNEL__ */
 159 #else   /* _VX_CONTEXT_H */
 160 #warning duplicate inclusion
 161 #endif  /* _VX_CONTEXT_H */