1 files changed, 17 insertions, 6 deletions

diff --git a/include/linux/ext2_fs.h b/include/linux/ext2_fs.h
index 153d755376a4..c77c3bbfe4bb 100644
--- a/include/linux/ext2_fs.h
+++ b/include/linux/ext2_fs.h
@@ -29,11 +29,12 @@
 #undef EXT2FS_DEBUG
 
 /*
- * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
+ * Define EXT2_RESERVATION to reserve data blocks for expanding files
  */
-#define EXT2_PREALLOCATE
-#define EXT2_DEFAULT_PREALLOC_BLOCKS    8
-
+#define EXT2_DEFAULT_RESERVE_BLOCKS     8
+/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
+#define EXT2_MAX_RESERVE_BLOCKS         1027
+#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
 /*
  * The second extended file system version
  */
@@ -200,6 +201,8 @@ struct ext2_group_desc
 #define EXT2_IOC_SETFLAGS               FS_IOC_SETFLAGS
 #define EXT2_IOC_GETVERSION             FS_IOC_GETVERSION
 #define EXT2_IOC_SETVERSION             FS_IOC_SETVERSION
+#define EXT2_IOC_GETRSVSZ               _IOR('f', 5, long)
+#define EXT2_IOC_SETRSVSZ               _IOW('f', 6, long)
 
 /*
  * ioctl commands in 32 bit emulation
@@ -317,8 +320,9 @@ struct ext2_inode {
 #define EXT2_MOUNT_XATTR_USER           0x004000  /* Extended user attributes */
 #define EXT2_MOUNT_POSIX_ACL            0x008000  /* POSIX Access Control Lists */
 #define EXT2_MOUNT_XIP                  0x010000  /* Execute in place */
-#define EXT2_MOUNT_USRQUOTA             0x020000 /* user quota */
-#define EXT2_MOUNT_GRPQUOTA             0x040000 /* group quota */
+#define EXT2_MOUNT_USRQUOTA             0x020000  /* user quota */
+#define EXT2_MOUNT_GRPQUOTA             0x040000  /* group quota */
+#define EXT2_MOUNT_RESERVATION          0x080000  /* Preallocation */
 
 
 #define clear_opt(o, opt)               o &= ~EXT2_MOUNT_##opt
@@ -558,4 +562,11 @@ enum {
 #define EXT2_DIR_REC_LEN(name_len)      (((name_len) + 8 + EXT2_DIR_ROUND) & \
                                          ~EXT2_DIR_ROUND)
 
+static inline ext2_fsblk_t
+ext2_group_first_block_no(struct super_block *sb, unsigned long group_no)
+{
+        return group_no * (ext2_fsblk_t)EXT2_BLOCKS_PER_GROUP(sb) +
+                le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block);
+}
+
 #endif  /* _LINUX_EXT2_FS_H */