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 #define VXC_SYSLOG              0x00001000
  56
  57 #define VXC_SECURE_MOUNT        0x00010000
  58 #define VXC_SECURE_REMOUNT      0x00020000
  59 #define VXC_BINARY_MOUNT        0x00040000
  60
  61 #define VXC_QUOTA_CTL           0x00100000
  62
  63
  64 /* context state changes */
  65
  66 enum {
  67         VSC_STARTUP = 1,
  68         VSC_SHUTDOWN,
  69 };
  70
  71
  72 #ifdef  __KERNEL__
  73
  74 #include <linux/list.h>
  75 #include <linux/spinlock.h>
  76 #include <linux/rcupdate.h>
  77
  78 #include "limit_def.h"
  79 #include "sched_def.h"
  80 #include "cvirt_def.h"
  81
  82 struct vx_info {
  83         struct hlist_node vx_hlist;             /* linked list of contexts */
  84         struct rcu_head vx_rcu;                 /* the rcu head */
  85         xid_t vx_id;                            /* context id */
  86         atomic_t vx_usecnt;                     /* usage count */
  87         atomic_t vx_tasks;                      /* tasks count */
  88         struct vx_info *vx_parent;              /* parent context */
  89         int vx_state;                           /* context state */
  90
  91         struct namespace *vx_namespace;         /* private namespace */
  92         struct fs_struct *vx_fs;                /* private namespace fs */
  93         uint64_t vx_flags;                      /* context flags */
  94         uint64_t vx_bcaps;                      /* bounding caps (system) */
  95         uint64_t vx_ccaps;                      /* context caps (vserver) */
  96
  97         pid_t vx_initpid;                       /* PID of fake init process */
  98
  99         spinlock_t vx_lock;
 100         wait_queue_head_t vx_wait;              /* context exit waitqueue */
 101
 102         struct _vx_limit limit;                 /* vserver limits */
 103         struct _vx_sched sched;                 /* vserver scheduler */
 104         struct _vx_cvirt cvirt;                 /* virtual/bias stuff */
 105         struct _vx_cacct cacct;                 /* context accounting */
 106
 107         char vx_name[65];                       /* vserver name */
 108 };
 109
 110
 111 /* status flags */
 112
 113 #define VXS_HASHED      0x0001
 114 #define VXS_PAUSED      0x0010
 115 #define VXS_ONHOLD      0x0020
 116 #define VXS_SHUTDOWN    0x0100
 117 #define VXS_DEFUNCT     0x1000
 118 #define VXS_RELEASED    0x8000
 119
 120 /* check conditions */
 121
 122 #define VX_ADMIN        0x0001
 123 #define VX_WATCH        0x0002
 124 #define VX_HIDE         0x0004
 125 #define VX_HOSTID       0x0008
 126
 127 #define VX_IDENT        0x0010
 128 #define VX_EQUIV        0x0020
 129 #define VX_PARENT       0x0040
 130 #define VX_CHILD        0x0080
 131
 132 #define VX_ARG_MASK     0x00F0
 133
 134 #define VX_DYNAMIC      0x0100
 135 #define VX_STATIC       0x0200
 136
 137 #define VX_ATR_MASK     0x0F00
 138
 139
 140 extern void claim_vx_info(struct vx_info *, struct task_struct *);
 141 extern void release_vx_info(struct vx_info *, struct task_struct *);
 142
 143 extern struct vx_info *locate_vx_info(int);
 144 extern struct vx_info *locate_or_create_vx_info(int);
 145
 146 extern int get_xid_list(int, unsigned int *, int);
 147 extern int xid_is_hashed(xid_t);
 148
 149 extern int vx_migrate_task(struct task_struct *, struct vx_info *);
 150
 151 extern long vs_state_change(struct vx_info *, unsigned int);
 152
 153 extern void free_vx_info(struct vx_info *);
 154
 155
 156 #endif  /* __KERNEL__ */
 157 #else   /* _VX_CONTEXT_H */
 158 #warning duplicate inclusion
 159 #endif  /* _VX_CONTEXT_H */