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krbd_discard_512b.t
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$ rbd create --size 4M img
$ DEV=$(sudo rbd map -o alloc_size=512 img)
Zero, < 1 block:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 156672 -l 512 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0026400 0000 0000 0000 0000 0000 0000 0000 0000
*
0026600 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131584 -l 64512 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020200 0000 0000 0000 0000 0000 0000 0000 0000
*
002fe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131584 -l 65024 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020200 0000 0000 0000 0000 0000 0000 0000 0000
*
0030000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 65024 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
002fe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
Zero, 1 block:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 65536 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
0030000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 66048 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
0030200 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 130560 -l 66048 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
001fe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0030000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 130560 -l 66560 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
001fe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0030200 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
Zero, < 2 blocks:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 163840 -l 65536 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0028000 0000 0000 0000 0000 0000 0000 0000 0000
*
0038000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131584 -l 130048 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020200 0000 0000 0000 0000 0000 0000 0000 0000
*
003fe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131584 -l 130560 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020200 0000 0000 0000 0000 0000 0000 0000 0000
*
0040000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 130560 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
003fe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
Zero, 2 blocks:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 131072 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
0040000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 131072 -l 131584 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0020000 0000 0000 0000 0000 0000 0000 0000 0000
*
0040200 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 130560 -l 131584 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
001fe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0040000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 130560 -l 132096 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
001fe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0040200 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
Zero, 37 blocks:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 589824 -l 2424832 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0090000 0000 0000 0000 0000 0000 0000 0000 0000
*
02e0000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 589312 -l 2424832 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
008fe00 0000 0000 0000 0000 0000 0000 0000 0000
*
02dfe00 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 590336 -l 2424832 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0090200 0000 0000 0000 0000 0000 0000 0000 0000
*
02e0200 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
Truncate:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4193792 -l 512 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03ffe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4129280 -l 65024 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03f0200 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4128768 -l 65536 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03f0000 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4128256 -l 66048 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03efe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4063744 -l 130560 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03e0200 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4063232 -l 131072 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03e0000 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 4062720 -l 131584 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
03dfe00 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 512 -l 4193792 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0000200 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
Delete:
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 0 -l 4194304 $DEV
$ hexdump $DEV
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
Empty clone:
$ xfs_io -c 'pwrite -S 0xab -w 0 4M' $DEV >/dev/null
$ sudo rbd unmap $DEV
$ rbd snap create --no-progress img@snap
$ rbd snap protect img@snap
$ rbd clone img@snap cloneimg1
$ DEV=$(sudo rbd map -o alloc_size=512 cloneimg1)
$ blkdiscard -o 720896 -l 2719744 $DEV
$ hexdump $DEV
0000000 abab abab abab abab abab abab abab abab
*
0400000
$ sudo rbd unmap $DEV
$ rbd clone img@snap cloneimg2
$ DEV=$(sudo rbd map -o alloc_size=512 cloneimg2)
$ blkdiscard -o 1474560 -l 2719744 $DEV
$ hexdump $DEV
0000000 abab abab abab abab abab abab abab abab
*
0400000
$ sudo rbd unmap $DEV
$ rbd clone img@snap cloneimg3
$ DEV=$(sudo rbd map -o alloc_size=512 cloneimg3)
$ blkdiscard -o 0 -l 4194304 $DEV
$ hexdump $DEV
0000000 abab abab abab abab abab abab abab abab
*
0400000
$ sudo rbd unmap $DEV
Full clone:
$ rbd clone img@snap cloneimg4
$ DEV=$(sudo rbd map -o alloc_size=512 cloneimg4)
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 720896 -l 2719744 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
00b0000 0000 0000 0000 0000 0000 0000 0000 0000
*
0348000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 1474560 -l 2719744 $DEV
$ hexdump $DEV
0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
0168000 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ xfs_io -c 'pwrite -w 0 4M' $DEV >/dev/null
$ blkdiscard -o 0 -l 4194304 $DEV
$ hexdump $DEV
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0400000
$ sudo rbd unmap $DEV
Multiple object requests:
$ rbd create --size 50M --stripe-unit 16K --stripe-count 5 fancyimg
$ DEV=$(sudo rbd map -o alloc_size=512 fancyimg)
$ xfs_io -c 'pwrite -b 4M -w 0 50M' $DEV >/dev/null
$ blkdiscard -o 0 -l 143360 $DEV
$ hexdump $DEV
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0023000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
3200000
$ xfs_io -c 'pwrite -b 4M -w 0 50M' $DEV >/dev/null
$ blkdiscard -o 0 -l 286720 $DEV
$ hexdump $DEV
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
0046000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
3200000
$ xfs_io -c 'pwrite -b 4M -w 0 50M' $DEV >/dev/null
$ blkdiscard -o 0 -l 573440 $DEV
$ hexdump $DEV
0000000 0000 0000 0000 0000 0000 0000 0000 0000
*
008c000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
*
3200000
$ sudo rbd unmap $DEV
$ rbd rm --no-progress fancyimg
$ rbd rm --no-progress cloneimg4
$ rbd rm --no-progress cloneimg3
$ rbd rm --no-progress cloneimg2
$ rbd rm --no-progress cloneimg1
$ rbd snap unprotect img@snap
$ rbd snap rm --no-progress img@snap
$ rbd rm --no-progress img