fstype/swap_fs.h

   1 #ifndef __LINUX_SWAP_FS_H
   2 #define __LINUX_SWAP_FS_H
   3
   4 /* The basic structures of the swap super block */
   5 #define SWAP_MAGIC_L            10
   6 #define SWAP_RESERVED_L         (1024 - SWAP_MAGIC_L)
   7 #define SWAP_MAGIC_1            "SWAP-SPACE"
   8 #define SWAP_MAGIC_2            "SWAPSPACE2"
   9
  10 /* Suspend signatures, located at same addr as swap magic */
  11 #define SUSP_MAGIC_L            9
  12 #define SUSP_MAGIC_1            "S1SUSPEND"
  13 #define SUSP_MAGIC_2            "S2SUSPEND"
  14 #define SUSP_MAGIC_U            "ULSUSPEND"
  15
  16 /* The superblock is the last block in the first page */
  17 #define SWAP_OFFSET()           ((getpagesize() - 1024) >> 10)
  18
  19 /* On-disk "super block" */
  20 struct swap_super_block {
  21         char reserved[SWAP_RESERVED_L];
  22         char magic[SWAP_MAGIC_L];
  23 };
  24
  25 #endif