include/linux/vs_context.h

   1 #ifndef _VX_VS_CONTEXT_H
   2 #define _VX_VS_CONTEXT_H
   3
   4
   5 #include <linux/kernel.h>
   6 #include <linux/rcupdate.h>
   7 #include <linux/sched.h>
   8
   9 #include "vserver/context.h"
  10 #include "vserver/debug.h"
  11
  12
  13 extern int proc_pid_vx_info(struct task_struct *, char *);
  14
  15
  16 #define get_vx_info(i)  __get_vx_info(i,__FILE__,__LINE__)
  17
  18 static inline struct vx_info *__get_vx_info(struct vx_info *vxi,
  19         const char *_file, int _line)
  20 {
  21         if (!vxi)
  22                 return NULL;
  23         vxlprintk(VXD_CBIT(xid, 2), "get_vx_info(%p[#%d.%d])",
  24                 vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
  25                 _file, _line);
  26         atomic_inc(&vxi->vx_usecnt);
  27         return vxi;
  28 }
  29
  30
  31 extern void free_vx_info(struct vx_info *);
  32
  33 #define put_vx_info(i)  __put_vx_info(i,__FILE__,__LINE__)
  34
  35 static inline void __put_vx_info(struct vx_info *vxi, const char *_file, int _line)
  36 {
  37         if (!vxi)
  38                 return;
  39         vxlprintk(VXD_CBIT(xid, 2), "put_vx_info(%p[#%d.%d])",
  40                 vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
  41                 _file, _line);
  42         if (atomic_dec_and_test(&vxi->vx_usecnt))
  43                 free_vx_info(vxi);
  44 }
  45
  46 #define set_vx_info(p,i) __set_vx_info(p,i,__FILE__,__LINE__)
  47
  48 static inline void __set_vx_info(struct vx_info **vxp, struct vx_info *vxi,
  49         const char *_file, int _line)
  50 {
  51         struct vx_info *vxo;
  52
  53         if (!vxi)
  54                 return;
  55
  56         vxlprintk(VXD_CBIT(xid, 3), "set_vx_info(%p[#%d.%d.%d])",
  57                 vxi, vxi?vxi->vx_id:0,
  58                 vxi?atomic_read(&vxi->vx_usecnt):0,
  59                 vxi?atomic_read(&vxi->vx_refcnt):0,
  60                 _file, _line);
  61
  62         atomic_inc(&vxi->vx_refcnt);
  63         vxo = xchg(vxp, __get_vx_info(vxi, _file, _line));
  64         BUG_ON(vxo);
  65 }
  66
  67 #define clr_vx_info(p)  __clr_vx_info(p,__FILE__,__LINE__)
  68
  69 static inline void __clr_vx_info(struct vx_info **vxp,
  70         const char *_file, int _line)
  71 {
  72         struct vx_info *vxo;
  73
  74         vxo = xchg(vxp, NULL);
  75         if (!vxo)
  76                 return;
  77
  78         vxlprintk(VXD_CBIT(xid, 3), "clr_vx_info(%p[#%d.%d.%d])",
  79                 vxo, vxo?vxo->vx_id:0,
  80                 vxo?atomic_read(&vxo->vx_usecnt):0,
  81                 vxo?atomic_read(&vxo->vx_refcnt):0,
  82                 _file, _line);
  83
  84         if (atomic_dec_and_test(&vxo->vx_refcnt))
  85                 unhash_vx_info(vxo);
  86         __put_vx_info(vxo, _file, _line);
  87 }
  88
  89
  90 #define task_get_vx_info(i)     __task_get_vx_info(i,__FILE__,__LINE__)
  91
  92 static __inline__ struct vx_info *__task_get_vx_info(struct task_struct *p,
  93         const char *_file, int _line)
  94 {
  95         struct vx_info *vxi;
  96
  97         task_lock(p);
  98         vxlprintk(VXD_CBIT(xid, 5), "task_get_vx_info(%p)",
  99                 p, _file, _line);
 100         vxi = __get_vx_info(p->vx_info, _file, _line);
 101         task_unlock(p);
 102         return vxi;
 103 }
 104
 105
 106 #define vx_verify_info(p,i)     \
 107         __vx_verify_info((p)->vx_info,i,__FILE__,__LINE__)
 108
 109 static __inline__ void __vx_verify_info(
 110         struct vx_info *vxa, struct vx_info *vxb,
 111         const char *_file, int _line)
 112 {
 113         if (vxa == vxb)
 114                 return;
 115         printk(KERN_ERR "vx bad assumption (%p==%p) at %s:%d\n",
 116                 vxa, vxb, _file, _line);
 117 }
 118
 119
 120 #else
 121 #warning duplicate inclusion
 122 #endif