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#!/bin/bash
source "$TEST_TOP/common"
check_prereq mkfs.btrfs
check_prereq btrfs
check_prereq btrfstune
check_prereq btrfs-image
setup_root_helper
prepare_test_dev
function read_fsid {
local dev="$1"
echo $(run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal \
dump-super "$dev" | awk '/fsid/ {print $2}' | head -n 1)
}
function read_metadata_uuid {
local dev="$1"
echo $(run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal \
dump-super "$dev" | awk '/metadata_uuid/ {print $2}')
}
function check_btrfstune {
local fsid
echo "Checking btrfstune logic" >> "$RESULTS"
# test with random uuid
run_check $SUDO_HELPER "$TOP/btrfstune" -m "$TEST_DEV"
# check that specific uuid can set
run_check $SUDO_HELPER "$TOP/btrfstune" -M d88c8333-a652-4476-b225-2e9284eb59f1 "$TEST_DEV"
# test that having seed on already changed device doesn't work
run_mustfail "Managed to set seed on metadata uuid fs" \
$SUDO_HELPER "$TOP/btrfstune" -S 1 "$TEST_DEV"
# test that setting both seed and -m|M is forbidden
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_mustfail "Succeeded setting seed and changing fs uuid" \
$SUDO_HELPER "$TOP/btrfstune" -S 1 -m "$TEST_DEV"
# test that having -m|-M on seed device is forbidden
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_check $SUDO_HELPER "$TOP/btrfstune" -S 1 "$TEST_DEV"
run_mustfail "Succeded changing fsid on a seed device" $SUDO_HELPER "$TOP/btrfstune" -m "$TEST_DEV"
# test that using -U|-u on an fs with METADATA_UUID flag is forbidden
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_check $SUDO_HELPER "$TOP/btrfstune" -m "$TEST_DEV"
run_mustfail "Succeeded triggering FSID rewrite while METADATA_UUID is active" \
$SUDO_HELPER "$TOP/btrfstune" -u "$TEST_DEV"
}
function check_dump_super_output {
local fsid
local metadata_uuid
local dev_item_match
local old_metadata_uuid
echo "Checking dump-super output" >> "$RESULTS"
# assert that metadata/fsid match on non-changed fs
fsid=$(read_fsid "$TEST_DEV")
metadata_uuid=$(read_metadata_uuid "$TEST_DEV")
[ "$fsid" = "$metadata_uuid" ] || _fail "fsid ("$fsid") doesn't match metadata_uuid ("$metadata_uuid")"
dev_item_match=$(run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super \
"$TEST_DEV" | awk '/dev_item.fsid/ {print $3}')
[ $dev_item_match = "[match]" ] || _fail "dev_item.fsid doesn't match on non-metadata uuid fs"
echo "Checking output after fsid change" >> "$RESULTS"
# change metadatauuid and ensure everything in the output is still correct
old_metadata_uuid=$metadata_uuid
run_check $SUDO_HELPER "$TOP/btrfstune" -M d88c8333-a652-4476-b225-2e9284eb59f1 "$TEST_DEV"
fsid=$(read_fsid "$TEST_DEV")
metadata_uuid=$(read_metadata_uuid "$TEST_DEV")
dev_item_match=$(run_check_stdout $SUDO_HELPER "$TOP/btrfs" \
inspect-internal dump-super "$TEST_DEV" | awk '/dev_item.fsid/ {print $3}')
[ "$dev_item_match" = "[match]" ] || _fail "dev_item.fsid doesn't match on metadata uuid fs"
[ "$fsid" = "d88c8333-a652-4476-b225-2e9284eb59f1" ] || _fail "btrfstune metadata UUID change failed"
[ "$old_metadata_uuid" = "$metadata_uuid" ] || _fail "Metadata uuid change unexpectedly"
echo "Checking for incompat textual representation" >> "$RESULTS"
# check for textual output of the new incompat feature
run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super \
"$TEST_DEV" | grep -q METADATA_UUID
[ $? -eq 0 ] || _fail "Didn't find textual representation of METADATA_UUID feature"
echo "Checking setting fsid back to original" >> "$RESULTS"
# ensure that setting the fsid back to the original works
run_check $SUDO_HELPER "$TOP/btrfstune" -M "$old_metadata_uuid" "$TEST_DEV"
fsid=$(read_fsid "$TEST_DEV")
metadata_uuid=$(read_metadata_uuid "$TEST_DEV")
[ "$fsid" = "$metadata_uuid" ] || _fail "FSID and METADATA_UUID don't match"
run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super \
"$TEST_DEV" | grep -q METADATA_UUID
[ $? -eq 1 ] || _fail "METADATA_UUID feature still shown as enabled"
}
function check_image_restore {
local metadata_uuid
local fsid
local fsid_restored
local metadata_uuid_restored
echo "TESTING btrfs-image restore" >> "$RESULTS"
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_check $SUDO_HELPER "$TOP/btrfstune" -m "$TEST_DEV"
fsid=$(read_fsid "$TEST_DEV")
metadata_uuid=$(read_metadata_uuid "$TEST_DEV")
run_mayfail $SUDO_HELPER "$TOP/btrfs-image" "$TEST_DEV" /tmp/test-img.dump
# erase the fs by creating a new one, wipefs is not sufficient as it just
# deletes the fs magic string
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
run_check $SUDO_HELPER "$TOP/btrfs-image" -r /tmp/test-img.dump "$TEST_DEV"
fsid_restored=$(read_fsid "$TEST_DEV")
metadata_uuid_restored=$(read_metadata_uuid "$TEST_DEV")
[ "$fsid" = "$fsid_restored" ] || _fail "FSID don't match after restore"
[ "$metadata_uuid" = "$metadata_uuid_restored" ] || _fail "metadata uuids don't match after restore"
}
function check_inprogress_flag {
# check the flag is indeed cleared
run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super \
$1 | grep -q 0x1000000001
[ $? -eq 1 ] || _fail "Found BTRFS_SUPER_FLAG_CHANGING_FSID_V2 set for $1"
run_check_stdout $SUDO_HELPER $TOP/btrfs inspect-internal dump-super \
$2 | grep -q 0x1000000001
[ $? -eq 1 ] || _fail "Found BTRFS_SUPER_FLAG_CHANGING_FSID_V2 set for $2"
}
function check_completed {
# check that metadata uuid is indeed completed
run_check_stdout $SUDO_HELPER "$TOP/btrfs" inspect-internal dump-super \
$1 | grep -q METADATA_UUID
[ $? -eq 0 ] || _fail "METADATA_UUID not set on $1"
run_check_stdout $SUDO_HELPER $TOP/btrfs inspect-internal dump-super \
$2 | grep -q METADATA_UUID
[ $? -eq 0 ] || _fail "METADATA_UUID not set on $2"
}
function check_multi_fsid_change {
check_inprogress_flag $1 $2
check_completed $1 $2
}
function failure_recovery {
local image1
local image2
local loop1
local loop2
local devcount
image1=$(extract_image "$1")
image2=$(extract_image "$2")
loop1=$(run_check_stdout $SUDO_HELPER losetup --find --show "$image1")
loop2=$(run_check_stdout $SUDO_HELPER losetup --find --show "$image2")
# Mount and unmount, on trans commit all disks should be consistent
run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
run_check $SUDO_HELPER umount "$TEST_MNT"
# perform any specific check
$3 "$loop1" "$loop2"
# cleanup
run_check $SUDO_HELPER losetup -d "$loop1"
run_check $SUDO_HELPER losetup -d "$loop2"
rm -f "$image1" "$image2"
}
function reload_btrfs {
rmmod btrfs
modprobe btrfs
}
# for full coverage we need btrfs to actually be a module
modinfo btrfs > /dev/null 2>&1 || _not_run "btrfs must be a module"
modprobe -r btrfs || _not_run "btrfs must be unloadable"
modprobe btrfs || _not_run "loading btrfs module failed"
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
check_btrfstune
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
check_dump_super_output
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$TEST_DEV"
check_image_restore
# disk1 is an image which has no metadata uuid flags set and disk2 is part of
# the same fs but has the in-progress flag set. Test that whicever is scanned
# first will result in consistent filesystem.
failure_recovery "./disk1.raw.xz" "./disk2.raw.xz" check_inprogress_flag
reload_btrfs
failure_recovery "./disk2.raw.xz" "./disk1.raw.xz" check_inprogress_flag
reload_btrfs
# disk4 contains an image in with the in-progress flag set and disk 3 is part
# of the same filesystem but has both METADATA_UUID incompat and a new
# metadata uuid set. So disk 3 must always take precedence
failure_recovery "./disk3.raw.xz" "./disk4.raw.xz" check_completed
reload_btrfs
failure_recovery "./disk4.raw.xz" "./disk3.raw.xz" check_completed
# disk5 contains an image which has undergone a successful fsid change more
# than once, disk6 on the other hand is member of the same filesystem but
# hasn't completed its last change. Thus it has both the FSID_CHANGING flag set
# and METADATA_UUID flag set.
failure_recovery "./disk5.raw.xz" "./disk6.raw.xz" check_multi_fsid_change
reload_btrfs
failure_recovery "./disk6.raw.xz" "./disk5.raw.xz" check_multi_fsid_change
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