This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / linux / vserver / history.h

diff --git a/include/linux/vserver/history.h b/include/linux/vserver/history.h
new file mode 100644 (file)
index 0000000..acb04df
--- /dev/null
+++ b/include/linux/vserver/history.h
@@ -0,0 +1,197 @@
+#ifndef _VX_HISTORY_H
+#define _VX_HISTORY_H
+
+
+enum {
+       VXH_UNUSED=0,
+       VXH_THROW_OOPS=1,
+
+       VXH_GET_VX_INFO,
+       VXH_PUT_VX_INFO,
+       VXH_INIT_VX_INFO,
+       VXH_SET_VX_INFO,
+       VXH_CLR_VX_INFO,
+       VXH_CLAIM_VX_INFO,
+       VXH_RELEASE_VX_INFO,
+       VXH_ALLOC_VX_INFO,
+       VXH_DEALLOC_VX_INFO,
+       VXH_HASH_VX_INFO,
+       VXH_UNHASH_VX_INFO,
+       VXH_LOC_VX_INFO,
+       VXH_LOOKUP_VX_INFO,
+       VXH_CREATE_VX_INFO,
+};
+
+struct _vxhe_vxi {
+       struct vx_info *ptr;
+       unsigned xid;
+       unsigned usecnt;
+       unsigned tasks;
+};
+
+struct _vxhe_set_clr {
+       void *data;
+};
+
+struct _vxhe_loc_lookup {
+       unsigned arg;
+};
+
+struct _vx_hist_entry {
+       void *loc;
+       unsigned short seq;
+       unsigned short type;
+       struct _vxhe_vxi vxi;
+       union {
+               struct _vxhe_set_clr sc;
+               struct _vxhe_loc_lookup ll;
+       };
+};
+
+#ifdef CONFIG_VSERVER_HISTORY
+
+extern unsigned volatile int vxh_active;
+
+struct _vx_hist_entry *vxh_advance(void *loc);
+
+
+static inline
+void   __vxh_copy_vxi(struct _vx_hist_entry *entry, struct vx_info *vxi)
+{
+       entry->vxi.ptr = vxi;
+       if (vxi) {
+               entry->vxi.usecnt = atomic_read(&vxi->vx_usecnt);
+               entry->vxi.tasks = atomic_read(&vxi->vx_tasks);
+               entry->vxi.xid = vxi->vx_id;
+       }
+}
+
+
+#define        __HERE__ current_text_addr()
+
+#define __VXH_BODY(__type, __data, __here)     \
+       struct _vx_hist_entry *entry;           \
+                                               \
+       preempt_disable();                      \
+       entry = vxh_advance(__here);            \
+       __data;                                 \
+       entry->type = __type;                   \
+       preempt_enable();
+
+
+       /* pass vxi only */
+
+#define __VXH_SMPL                             \
+       __vxh_copy_vxi(entry, vxi)
+
+static inline
+void   __vxh_smpl(struct vx_info *vxi, int __type, void *__here)
+{
+       __VXH_BODY(__type, __VXH_SMPL, __here)
+}
+
+       /* pass vxi and data (void *) */
+
+#define __VXH_DATA                             \
+       __vxh_copy_vxi(entry, vxi);             \
+       entry->sc.data = data
+
+static inline
+void   __vxh_data(struct vx_info *vxi, void *data,
+                       int __type, void *__here)
+{
+       __VXH_BODY(__type, __VXH_DATA, __here)
+}
+
+       /* pass vxi and arg (long) */
+
+#define __VXH_LONG                             \
+       __vxh_copy_vxi(entry, vxi);             \
+       entry->ll.arg = arg
+
+static inline
+void   __vxh_long(struct vx_info *vxi, long arg,
+                       int __type, void *__here)
+{
+       __VXH_BODY(__type, __VXH_LONG, __here)
+}
+
+
+static inline
+void   __vxh_throw_oops(void *__here)
+{
+       __VXH_BODY(VXH_THROW_OOPS, {}, __here);
+       /* prevent further acquisition */
+       vxh_active = 0;
+}
+
+
+#define vxh_throw_oops()       __vxh_throw_oops(__HERE__);
+
+#define __vxh_get_vx_info(v,h) __vxh_smpl(v, VXH_GET_VX_INFO, h);
+#define __vxh_put_vx_info(v,h) __vxh_smpl(v, VXH_PUT_VX_INFO, h);
+
+#define __vxh_init_vx_info(v,d,h) \
+       __vxh_data(v,d, VXH_INIT_VX_INFO, h);
+#define __vxh_set_vx_info(v,d,h) \
+       __vxh_data(v,d, VXH_SET_VX_INFO, h);
+#define __vxh_clr_vx_info(v,d,h) \
+       __vxh_data(v,d, VXH_CLR_VX_INFO, h);
+
+#define __vxh_claim_vx_info(v,d,h) \
+       __vxh_data(v,d, VXH_CLAIM_VX_INFO, h);
+#define __vxh_release_vx_info(v,d,h) \
+       __vxh_data(v,d, VXH_RELEASE_VX_INFO, h);
+
+#define vxh_alloc_vx_info(v) \
+       __vxh_smpl(v, VXH_ALLOC_VX_INFO, __HERE__);
+#define vxh_dealloc_vx_info(v) \
+       __vxh_smpl(v, VXH_DEALLOC_VX_INFO, __HERE__);
+
+#define vxh_hash_vx_info(v) \
+       __vxh_smpl(v, VXH_HASH_VX_INFO, __HERE__);
+#define vxh_unhash_vx_info(v) \
+       __vxh_smpl(v, VXH_UNHASH_VX_INFO, __HERE__);
+
+#define vxh_loc_vx_info(v,l) \
+       __vxh_long(v,l, VXH_LOC_VX_INFO, __HERE__);
+#define vxh_lookup_vx_info(v,l) \
+       __vxh_long(v,l, VXH_LOOKUP_VX_INFO, __HERE__);
+#define vxh_create_vx_info(v,l) \
+       __vxh_long(v,l, VXH_CREATE_VX_INFO, __HERE__);
+
+extern void vxh_dump_history(void);
+
+
+#else  /* CONFIG_VSERVER_HISTORY */
+
+#define        __HERE__        0
+
+#define vxh_throw_oops()               do { } while (0)
+
+#define __vxh_get_vx_info(v,h)         do { } while (0)
+#define __vxh_put_vx_info(v,h)         do { } while (0)
+
+#define __vxh_init_vx_info(v,d,h)      do { } while (0)
+#define __vxh_set_vx_info(v,d,h)       do { } while (0)
+#define __vxh_clr_vx_info(v,d,h)       do { } while (0)
+
+#define __vxh_claim_vx_info(v,d,h)     do { } while (0)
+#define __vxh_release_vx_info(v,d,h)   do { } while (0)
+
+#define vxh_alloc_vx_info(v)           do { } while (0)
+#define vxh_dealloc_vx_info(v)         do { } while (0)
+
+#define vxh_hash_vx_info(v)            do { } while (0)
+#define vxh_unhash_vx_info(v)          do { } while (0)
+
+#define vxh_loc_vx_info(a,v)           do { } while (0)
+#define vxh_lookup_vx_info(a,v)                do { } while (0)
+#define vxh_create_vx_info(a,v)                do { } while (0)
+
+#define vxh_dump_history()             do { } while (0)
+
+
+#endif /* CONFIG_VSERVER_HISTORY */
+
+#endif /* _VX_HISTORY_H */