[PATCH v5 1/3] xfstests: btrfs: add functions to create dm-error device
From: Anand Jain <hidden>
Date: 2015-08-14 10:47:23
Also in:
linux-btrfs
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Anand Jain <redacted> Controlled EIO from the device is achieved using the dm device. Helper functions are at common/dmerror. Broadly steps will include calling _init_dmerror(). _init_dmerror() will use SCRATCH_DEV to create dm linear device and assign DMERROR_DEV to /dev/mapper/error-test. When test script is ready to get EIO, the test cases can call _load_dmerror_table() which then it will load the dm error. so that reading DMERROR_DEV will cause EIO. After the test case is complete, cleanup must be done by calling _cleanup_dmerror(). Signed-off-by: Anand Jain <redacted> Reviewed-by: Filipe Manana <redacted> --- v4->v5: No Change. keep up with the patch set v3->v4: rebase on latest xfstests code v2.1->v3: accepts Filipe Manana's review comments, thanks v2->v2.1: fixed missed typo error fixup in the commit. v1->v2: accepts Dave Chinner's review comments, thanks common/dmerror | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ common/rc | 9 ++++++++ 2 files changed, 78 insertions(+) create mode 100644 common/dmerror
diff --git a/common/dmerror b/common/dmerror
new file mode 100644
index 0000000..f895d90
--- /dev/null
+++ b/common/dmerror@@ -0,0 +1,69 @@ +##/bin/bash +# +# Copyright (c) 2015 Oracle. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +# +# +# common functions for setting up and tearing down a dmerror device + +_init_dmerror() +{ + $DMSETUP_PROG remove error-test > /dev/null 2>&1 + + local BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV` + + DMERROR_DEV='/dev/mapper/error-test' + + DMLINEAR_TABLE="0 $BLK_DEV_SIZE linear $SCRATCH_DEV 0" + + $DMSETUP_PROG create error-test --table "$DMLINEAR_TABLE" || \ + _fatal "failed to create dm linear device" + + DMERROR_TABLE="0 $BLK_DEV_SIZE error $SCRATCH_DEV 0" +} + +_scratch_mkfs_dmerror() +{ + $MKFS_BTRFS_PROG $* $DMERROR_DEV >> $seqres.full 2>&1 || \ + _fatal "failed to create mkfs.btrfs $* $DMERROR_DEV" +} + +_mount_dmerror() +{ + mount -t $FSTYP $MOUNT_OPTIONS $DMERROR_DEV $SCRATCH_MNT +} + +_unmount_dmerror() +{ + $UMOUNT_PROGS $SCRATCH_MNT +} + +_cleanup_dmerror() +{ + $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1 + $DMSETUP_PROG remove error-test > /dev/null 2>&1 +} + +_load_dmerror_table() +{ + $DMSETUP_PROG suspend error-test + [ $? -ne 0 ] && _fatal "failed to suspend error-test" + + $DMSETUP_PROG load error-test --table "$DMERROR_TABLE" + [ $? -ne 0 ] && _fatal "failed to load error table error-test" + + $DMSETUP_PROG resume error-test + [ $? -ne 0 ] && _fatal "failed to resume error-test" +}
diff --git a/common/rc b/common/rc
index 70d2fa8..8d4da0e 100644
--- a/common/rc
+++ b/common/rc@@ -1337,6 +1337,15 @@ _require_sane_bdev_flush() fi } +# this test requires the device mapper error target +# +_require_dmerror() +{ + _require_command "$DMSETUP_PROG" dmsetup + $DMSETUP_PROG targets | grep error >/dev/null 2>&1 + [ $? -ne 0 ] && _notrun "This test requires dm error support" +} + # this test requires the device mapper flakey target # _require_dm_flakey()
--
2.4.1