include/linux/vserver/debug.h

   1 #ifndef _VX_DEBUG_H
   2 #define _VX_DEBUG_H
   3
   4
   5 #define VXD_CBIT(n,m)   (vx_debug_ ## n & (1 << (m)))
   6 #define VXD_CMIN(n,m)   (vx_debug_ ## n > (m))
   7 #define VXD_MASK(n,m)   (vx_debug_ ## n & (m))
   8
   9 #define VXD_QPOS(v,p)   (((uint32_t)(v) >> ((p)*8)) & 0xFF)
  10 #define VXD_QUAD(v)     VXD_QPOS(v,0), VXD_QPOS(v,1),           \
  11                         VXD_QPOS(v,2), VXD_QPOS(v,3)
  12
  13 #define __FUNC__        __func__
  14
  15
  16 #ifdef  CONFIG_VSERVER_DEBUG
  17
  18 extern unsigned int vx_debug_switch;
  19 extern unsigned int vx_debug_xid;
  20 extern unsigned int vx_debug_nid;
  21 extern unsigned int vx_debug_net;
  22 extern unsigned int vx_debug_limit;
  23 extern unsigned int vx_debug_dlim;
  24 extern unsigned int vx_debug_cvirt;
  25
  26
  27 #define VX_LOGLEVEL     "vxD: "
  28 #define VX_WARNLEVEL    KERN_WARNING "vxW: "
  29
  30 #define vxdprintk(c,f,x...)                                     \
  31         do {                                                    \
  32                 if (c)                                          \
  33                         printk(VX_LOGLEVEL f "\n" , ##x);       \
  34         } while (0)
  35
  36 #define vxlprintk(c,f,x...)                                     \
  37         do {                                                    \
  38                 if (c)                                          \
  39                         printk(VX_LOGLEVEL f " @%s:%d\n", x);   \
  40         } while (0)
  41
  42 #define vxfprintk(c,f,x...)                                     \
  43         do {                                                    \
  44                 if (c)                                          \
  45                         printk(VX_LOGLEVEL f " %s@%s:%d\n", x); \
  46         } while (0)
  47
  48
  49 #define vxwprintk(c,f,x...)                                     \
  50         do {                                                    \
  51                 if (c)                                          \
  52                         printk(VX_WARNLEVEL f "\n" , ##x);      \
  53         } while (0)
  54
  55
  56 #define vxd_path(d,m)                                           \
  57         ({ static char _buffer[PATH_MAX];                       \
  58            d_path((d), (m), _buffer, sizeof(_buffer)); })
  59
  60 #else   /* CONFIG_VSERVER_DEBUG */
  61
  62 #define vx_debug_switch 0
  63 #define vx_debug_xid    0
  64 #define vx_debug_nid    0
  65 #define vx_debug_net    0
  66 #define vx_debug_limit  0
  67 #define vx_debug_dlim   0
  68 #define vx_debug_cvirt  0
  69
  70 #define vxdprintk(x...) do { } while (0)
  71 #define vxlprintk(x...) do { } while (0)
  72 #define vxfprintk(x...) do { } while (0)
  73 #define vxwprintk(x...) do { } while (0)
  74
  75 #define vxd_path        "<none>"
  76
  77 #endif  /* CONFIG_VSERVER_DEBUG */
  78
  79
  80 /* history stuff */
  81
  82 #ifdef  CONFIG_VSERVER_HISTORY
  83
  84
  85 extern unsigned volatile int vxh_active;
  86
  87 struct _vxhe_vxi {
  88         struct vx_info *ptr;
  89         unsigned xid;
  90         unsigned usecnt;
  91         unsigned refcnt;
  92 };
  93
  94 struct _vxhe_set_clr {
  95         void *data;
  96 };
  97
  98 struct _vxhe_loc_lookup {
  99         unsigned arg;
 100 };
 101
 102 enum {
 103         VXH_UNUSED=0,
 104         VXH_THROW_OOPS=1,
 105
 106         VXH_GET_VX_INFO,
 107         VXH_PUT_VX_INFO,
 108         VXH_SET_VX_INFO,
 109         VXH_CLR_VX_INFO,
 110         VXH_ALLOC_VX_INFO,
 111         VXH_DEALLOC_VX_INFO,
 112         VXH_HASH_VX_INFO,
 113         VXH_UNHASH_VX_INFO,
 114         VXH_LOC_VX_INFO,
 115         VXH_LOOKUP_VX_INFO,
 116 };
 117
 118 struct _vx_hist_entry {
 119         void *loc;
 120         unsigned short seq;
 121         unsigned short type;
 122         struct _vxhe_vxi vxi;
 123         union {
 124                 struct _vxhe_set_clr sc;
 125                 struct _vxhe_loc_lookup ll;
 126         };
 127 };
 128
 129 struct _vx_hist_entry *vxh_advance(void *loc);
 130
 131 #define VXH_HERE()              \
 132         ({ __label__ here;      \
 133                 here:;          \
 134                 &&here; })
 135
 136
 137
 138 static inline void __vxh_copy_vxi(struct _vx_hist_entry *entry, struct vx_info *vxi)
 139 {
 140         entry->vxi.ptr = vxi;
 141         if (vxi) {
 142                 entry->vxi.usecnt = atomic_read(&vxi->vx_usecnt);
 143                 entry->vxi.refcnt = atomic_read(&vxi->vx_refcnt);
 144                 entry->vxi.xid = vxi->vx_id;
 145         }
 146 }
 147
 148 static inline void vxh_throw_oops(void)
 149 {
 150         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 151
 152         entry->type = VXH_THROW_OOPS;
 153
 154         /* prevent further acquisition */
 155         vxh_active = 0;
 156 }
 157
 158 static inline void vxh_get_vx_info(struct vx_info *vxi)
 159 {
 160         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 161
 162         __vxh_copy_vxi(entry, vxi);
 163         entry->type = VXH_GET_VX_INFO;
 164 }
 165
 166 static inline void vxh_put_vx_info(struct vx_info *vxi)
 167 {
 168         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 169
 170         __vxh_copy_vxi(entry, vxi);
 171         entry->type = VXH_PUT_VX_INFO;
 172 }
 173
 174 static inline void vxh_set_vx_info(struct vx_info *vxi, void *data)
 175 {
 176         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 177
 178         __vxh_copy_vxi(entry, vxi);
 179         entry->sc.data = data;
 180         entry->type = VXH_SET_VX_INFO;
 181 }
 182
 183 static inline void vxh_clr_vx_info(struct vx_info *vxi, void *data)
 184 {
 185         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 186
 187         __vxh_copy_vxi(entry, vxi);
 188         entry->sc.data = data;
 189         entry->type = VXH_CLR_VX_INFO;
 190 }
 191
 192 static inline void vxh_alloc_vx_info(struct vx_info *vxi)
 193 {
 194         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 195
 196         __vxh_copy_vxi(entry, vxi);
 197         entry->type = VXH_ALLOC_VX_INFO;
 198 }
 199
 200 static inline void vxh_dealloc_vx_info(struct vx_info *vxi)
 201 {
 202         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 203
 204         __vxh_copy_vxi(entry, vxi);
 205         entry->type = VXH_DEALLOC_VX_INFO;
 206 }
 207
 208 static inline void vxh_hash_vx_info(struct vx_info *vxi)
 209 {
 210         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 211
 212         __vxh_copy_vxi(entry, vxi);
 213         entry->type = VXH_HASH_VX_INFO;
 214 }
 215
 216 static inline void vxh_unhash_vx_info(struct vx_info *vxi)
 217 {
 218         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 219
 220         __vxh_copy_vxi(entry, vxi);
 221         entry->type = VXH_UNHASH_VX_INFO;
 222 }
 223
 224 static inline void vxh_loc_vx_info(unsigned arg, struct vx_info *vxi)
 225 {
 226         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 227
 228         __vxh_copy_vxi(entry, vxi);
 229         entry->ll.arg = arg;
 230         entry->type = VXH_LOC_VX_INFO;
 231 }
 232
 233 static inline void vxh_lookup_vx_info(unsigned arg, struct vx_info *vxi)
 234 {
 235         struct _vx_hist_entry *entry = vxh_advance(VXH_HERE());
 236
 237         __vxh_copy_vxi(entry, vxi);
 238         entry->ll.arg = arg;
 239         entry->type = VXH_LOOKUP_VX_INFO;
 240 }
 241
 242 extern void vxh_dump_history(void);
 243
 244 #else  /* CONFIG_VSERVER_HISTORY */
 245
 246 #define vxh_throw_oops()        do { } while (0)
 247
 248 #define vxh_get_vx_info(v)      do { } while (0)
 249 #define vxh_put_vx_info(v)      do { } while (0)
 250
 251 #define vxh_set_vx_info(v,d)    do { } while (0)
 252 #define vxh_clr_vx_info(v,d)    do { } while (0)
 253
 254 #define vxh_alloc_vx_info(v)    do { } while (0)
 255 #define vxh_dealloc_vx_info(v)  do { } while (0)
 256
 257 #define vxh_hash_vx_info(v)     do { } while (0)
 258 #define vxh_unhash_vx_info(v)   do { } while (0)
 259
 260 #define vxh_loc_vx_info(a,v)    do { } while (0)
 261 #define vxh_lookup_vx_info(a,v) do { } while (0)
 262
 263 #define vxh_dump_history()      do { } while (0)
 264
 265
 266 #endif /* CONFIG_VSERVER_HISTORY */
 267
 268 #endif /* _VX_DEBUG_H */