4 #define OBD_SNAP_MAGIC 0xfffffff3 /* an unlikely block number */
6 #ifndef OBD_SNAP_DEVICENAME
7 #define OBD_SNAP_DEVICENAME "obdsnap"
10 /* ioctls for manipulating snapshots 40 - 60 */
11 #define OBD_SNAP_SETTABLE _IOWR('f', 40, long)
12 #define OBD_SNAP_PRINTTABLE _IOWR('f', 41, long)
13 #define OBD_SNAP_DELETE _IOWR('f', 42, long)
14 #define OBD_SNAP_RESTORE _IOWR('f', 43, long)
16 /* this is the obd device descriptor:
17 * - current snapshot ends up in first slot of this array
20 unsigned int snap_index; /* which snapshot index are we accessing */
24 void snap_use(int table_no, int snap_index) ;
25 void snap_unuse(int table_no, int snap_index) ;
26 int snap_is_used(int table_no, int snap_index) ;
27 int snap_table_attach(int tableno, int snap_index);