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_FORK_RSS            (1ULL<<48)
  40 #define VXF_PROLIFIC            (1ULL<<49)
  41
  42 #define VXF_IGNEG_NICE          (1ULL<<52)
  43
  44 #define VXF_ONE_TIME            (0x0003ULL<<32)
  45
  46
  47 /* context caps */
  48
  49 #define VXC_CAP_MASK            0x00000000
  50
  51 #define VXC_SET_UTSNAME         0x00000001
  52 #define VXC_SET_RLIMIT          0x00000002
  53
  54 #define VXC_RAW_ICMP            0x00000100
  55
  56 #define VXC_SECURE_MOUNT        0x00010000
  57 #define VXC_SECURE_REMOUNT      0x00020000
  58 #define VXC_BINARY_MOUNT        0x00040000
  59
  60 #define VXC_QUOTA_CTL           0x00100000
  61
  62
  63 /* vshelper sync commands */
  64
  65 #define VS_CONTEXT_CREATED      1
  66 #define VS_CONTEXT_DESTROY      2
  67
  68
  69 #ifdef  __KERNEL__
  70
  71 #include <linux/list.h>
  72 #include <linux/spinlock.h>
  73 #include <linux/rcupdate.h>
  74
  75 #include "limit_def.h"
  76 #include "sched_def.h"
  77 #include "cvirt_def.h"
  78
  79 struct vx_info {
  80         struct hlist_node vx_hlist;             /* linked list of contexts */
  81         struct rcu_head vx_rcu;                 /* the rcu head */
  82         xid_t vx_id;                            /* context id */
  83         atomic_t vx_usecnt;                     /* usage count */
  84         atomic_t vx_tasks;                      /* tasks count */
  85         struct vx_info *vx_parent;              /* parent context */
  86         int vx_state;                           /* context state */
  87
  88         struct namespace *vx_namespace;         /* private namespace */
  89         struct fs_struct *vx_fs;                /* private namespace fs */
  90         uint64_t vx_flags;                      /* context flags */
  91         uint64_t vx_bcaps;                      /* bounding caps (system) */
  92         uint64_t vx_ccaps;                      /* context caps (vserver) */
  93
  94         pid_t vx_initpid;                       /* PID of fake init process */
  95
  96         spinlock_t vx_lock;
  97         wait_queue_head_t vx_exit;              /* context exit waitqueue */
  98
  99         struct _vx_limit limit;                 /* vserver limits */
 100         struct _vx_sched sched;                 /* vserver scheduler */
 101         struct _vx_cvirt cvirt;                 /* virtual/bias stuff */
 102         struct _vx_cacct cacct;                 /* context accounting */
 103
 104         char vx_name[65];                       /* vserver name */
 105 };
 106
 107
 108 /* status flags */
 109
 110 #define VXS_HASHED      0x0001
 111 #define VXS_PAUSED      0x0010
 112 #define VXS_ONHOLD      0x0020
 113 #define VXS_SHUTDOWN    0x0100
 114 #define VXS_DEFUNCT     0x1000
 115 #define VXS_RELEASED    0x8000
 116
 117 /* check conditions */
 118
 119 #define VX_ADMIN        0x0001
 120 #define VX_WATCH        0x0002
 121 #define VX_HIDE         0x0004
 122 #define VX_HOSTID       0x0008
 123
 124 #define VX_IDENT        0x0010
 125 #define VX_EQUIV        0x0020
 126 #define VX_PARENT       0x0040
 127 #define VX_CHILD        0x0080
 128
 129 #define VX_ARG_MASK     0x00F0
 130
 131 #define VX_DYNAMIC      0x0100
 132 #define VX_STATIC       0x0200
 133
 134 #define VX_ATR_MASK     0x0F00
 135
 136
 137 extern void claim_vx_info(struct vx_info *, struct task_struct *);
 138 extern void release_vx_info(struct vx_info *, struct task_struct *);
 139
 140 extern struct vx_info *locate_vx_info(int);
 141 extern struct vx_info *locate_or_create_vx_info(int);
 142
 143 extern int get_xid_list(int, unsigned int *, int);
 144 extern int xid_is_hashed(xid_t);
 145
 146 extern int vx_migrate_task(struct task_struct *, struct vx_info *);
 147
 148 extern long vs_context_state(unsigned int);
 149
 150 extern void free_vx_info(struct vx_info *);
 151
 152
 153 #endif  /* __KERNEL__ */
 154 #else   /* _VX_CONTEXT_H */
 155 #warning duplicate inclusion
 156 #endif  /* _VX_CONTEXT_H */