test10.data

操作系统课内实验部分

// test10.data:  Checks that file blocks are being correctly returned to the
// free list.  It is similar to test8, however this time we are going
// to be checking to see if the blocks used in double and triple indirection
// are correctly returned.  At the very end of the test, you should get an
// ERROR as we run out of disk blocks.

// 1. Format the disk with 11 blocks total: (1 superblock, 1 inode block,
//    and 9 data blocks).
formatDisk 11 1

// 2. Write 4 triple-indirect blocks.  Write them so that 9 blocks are
//    needed.  (You can think about how this is done.)  I will choose
//    blocks 98,441 - 98,444
file1 = create
inum1 = inumber file1
seek file1 50401792 0
write file1 Aaaaaayyyyy!_ 2048

// 3. All the data blocks should be used now.  Close and clear the file.
close file1
delete inum1

// 4. Now write 6 double-indirect blocks.  Write them so that 9 blocks are
//  	needed.  I will choose blocks 776-781.
file2=create
inum2 = inumber file2
seek file2 397312 0
write file2 Aaaaaayyyyy!_ 3072

// 5. All the data blocks should be used now.  Close and clear the file.
close file2
delete inum2

// 6. Now write 8 single-indirect blocks.  Write them so that 9 blocks 
//  	are needed.  I will choose blocks 35-43.
file3 = create
inum3 = inumber file3
seek file3 17920 0
write file3 Aaaaaayyyyy!_ 4096

// 7. All the data blocks should be used now.  Close and clear the file.
close file3
delete inum3

// 8. Now write two files, one of 4 blocks and one of 5 blocks.
file4 = create
inum4 = inumber file4
write file4 Aaaaaayyyyy!_ 2048

file5 = create
inum5 = inumber file5
write file5 Aaaaaayyyyy!_ 2560

// 9. At this point, all the blocks should be used.  Add one more block to 
//   	file 4.  You should get an ERROR.
write file4 Aaaaaayyyyy!_ 512

// 10. If your code has not terminated on its own, shutdown and quit.
shutdown
quit