| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved. |
| # |
| # FSQA Test No. 116 |
| # |
| # Verify that when a fitrim operation is made against a btrfs filesystem, the |
| # ranges [0, 64Kb[ and [68Kb, 1Mb[ of the device are not discarded, they remain |
| # with the content they had before the fitrim operation. These regions of the |
| # device are reserved for a boot loader to use at its will. |
| # |
| . ./common/preamble |
| _begin_fstest auto quick metadata |
| |
| . ./common/filter |
| |
| _require_scratch |
| # Writing non-contiguous data directly to the device |
| _require_non_zoned_device $SCRATCH_DEV |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| |
| # Write to the [0, 64Kb[ and [68Kb, 1Mb[ ranges of the device. These ranges are |
| # reserved for a boot loader to use (GRUB for example) and btrfs should never |
| # use them - neither for allocating metadata/data nor should trim/discard them. |
| # The range [64Kb, 68Kb[ is used for the primary superblock of the filesystem. |
| $XFS_IO_PROG -c "pwrite -S 0xfd 0 64K" $SCRATCH_DEV | _filter_xfs_io |
| $XFS_IO_PROG -c "pwrite -S 0xfd 68K 956K" $SCRATCH_DEV | _filter_xfs_io |
| |
| # Now mount the filesystem and perform a fitrim against it. |
| _scratch_mount |
| _require_batched_discard $SCRATCH_MNT |
| $FSTRIM_PROG $SCRATCH_MNT |
| |
| # Now unmount the filesystem and verify the content of the ranges was not |
| # modified (no trim/discard happened on them). |
| _scratch_unmount |
| echo "Content of the ranges [0, 64Kb] and [68Kb, 1Mb[ after fitrim:" |
| od -t x1 -N $((64 * 1024)) $SCRATCH_DEV |
| od -t x1 -j $((68 * 1024)) -N $((956 * 1024)) $SCRATCH_DEV |
| |
| status=0 |
| exit |
