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test: iSCSI-related udev tests
This commit is contained in:
Frantisek Sumsal
parent
aedb60043a
commit
9cb41c3326
@ -33,6 +33,12 @@ _host_has_feature() {(
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btrfs)
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modprobe -nv btrfs && command -v mkfs.btrfs && command -v btrfs || return $?
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;;
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iscsi)
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# Client/initiator (Open-iSCSI)
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command -v iscsiadm && command -v iscsid || return $?
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# Server/target (TGT)
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command -v tgtadm && command -v tgtd || return $?
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;;
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lvm)
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command -v lvm || return $?
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;;
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@ -56,6 +62,7 @@ test_append_files() {(
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# checked for here
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local -A features=(
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[btrfs]=install_btrfs
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[iscsi]=install_iscsi
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[lvm]=install_lvm
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[multipath]=install_multipath
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)
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@ -362,6 +369,35 @@ testcase_btrfs_basic() {
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rm -f "${TESTDIR:?}"/btrfsbasic*.img
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}
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testcase_iscsi_lvm() {
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if ! _host_has_feature "iscsi" || ! _host_has_feature "lvm"; then
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echo "Missing iSCSI client/server tools (Open-iSCSI/TGT) or LVM utilities, skipping the test..."
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return 77
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fi
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local qemu_opts=("-device ahci,id=ahci0")
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local diskpath i size
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for i in {0..3}; do
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diskpath="${TESTDIR:?}/iscsibasic${i}.img"
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# Make the first disk larger for multi-partition tests
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[[ $i -eq 0 ]] && size=150 || size=64
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# Make the first disk larger for multi-partition tests
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dd if=/dev/zero of="$diskpath" bs=1M count="$size"
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qemu_opts+=(
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"-device ide-hd,bus=ahci0.$i,drive=drive$i,model=foobar,serial=deadbeefiscsi$i"
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"-drive format=raw,cache=unsafe,file=$diskpath,if=none,id=drive$i"
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)
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done
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KERNEL_APPEND="systemd.setenv=TEST_FUNCTION_NAME=${FUNCNAME[0]} ${USER_KERNEL_APPEND:-}"
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QEMU_OPTIONS="${qemu_opts[*]} ${USER_QEMU_OPTIONS:-}"
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test_run_one "${1:?}" || return $?
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rm -f "${TESTDIR:?}"/iscsibasic*.img
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}
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# Allow overriding which tests should be run from the "outside", useful for manual
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# testing (make -C test/... TESTCASES="testcase1 testcase2")
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if [[ -v "TESTCASES" && -n "$TESTCASES" ]]; then
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@ -40,6 +40,57 @@ helper_check_device_symlinks() {(
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done < <(find "${paths[@]}" -type l)
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)}
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# Wait for a specific device link to appear
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# Arguments:
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# $1 - device path
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# $2 - number of retries (default: 10)
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helper_wait_for_dev() {
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local dev="${1:?}"
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local ntries="${2:-10}"
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local i
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for ((i = 0; i < ntries; i++)); do
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test ! -e "$dev" || return 0
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sleep .2
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done
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return 1
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}
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# Wait for the lvm2-pvscan@.service of a specific device to finish
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# Arguments:
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# $1 - device path
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# $2 - number of retries (default: 10)
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helper_wait_for_pvscan() {
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local dev="${1:?}"
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local ntries="${2:-10}"
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local MAJOR MINOR pvscan_svc real_dev
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# Sanity check we got a valid block device (or a symlink to it)
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real_dev="$(readlink -f "$dev")"
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if [[ ! -b "$real_dev" ]]; then
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echo >&2 "ERROR: '$dev ($real_dev) is not a valid block device'"
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return 1
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fi
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# Get major and minor numbers from the udev database
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# (udevadm returns MAJOR= and MINOR= expressions, so let's pull them into
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# the current environment via `source` for easier parsing)
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source <(udevadm info -q property "$real_dev" | grep -E "(MAJOR|MINOR)=")
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# Sanity check if we got correct major and minor numbers
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test -e "/sys/dev/block/$MAJOR:$MINOR/"
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# Wait n_tries*0.5 seconds until the respective lvm2-pvscan service becomes
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# active (i.e. it got executed and finished)
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pvscan_svc="lvm2-pvscan@$MAJOR:$MINOR.service"
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for ((i = 0; i < ntries; i++)); do
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! systemctl -q is-active "$pvscan_svc" || return 0
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sleep .5
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done
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return 1
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}
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testcase_megasas2_basic() {
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lsblk -S
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[[ "$(lsblk --scsi --noheadings | wc -l)" -ge 128 ]]
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@ -397,6 +448,144 @@ EOF
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udevadm settle
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}
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testcase_iscsi_lvm() {
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local dev i label link lun_id mpoint target_name uuid
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local target_ip="127.0.0.1"
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local target_port="3260"
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local vgroup="iscsi_lvm$RANDOM"
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local expected_symlinks=()
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local devices=(
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/dev/disk/by-id/ata-foobar_deadbeefiscsi{0..3}
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)
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ls -l "${devices[@]}"
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# Start the target daemon
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systemctl start tgtd
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systemctl status tgtd
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echo "iSCSI LUNs backed by devices"
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# See RFC3721 and RFC7143
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target_name="iqn.2021-09.com.example:iscsi.test"
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# Initialize a new iSCSI target <$target_name> consisting of 4 LUNs, each
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# backed by a device
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tgtadm --lld iscsi --op new --mode target --tid=1 --targetname "$target_name"
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for ((i = 0; i < ${#devices[@]}; i++)); do
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# lun-0 is reserved by iSCSI
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lun_id="$((i + 1))"
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tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun "$lun_id" -b "${devices[$i]}"
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tgtadm --lld iscsi --op update --mode logicalunit --tid 1 --lun "$lun_id"
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expected_symlinks+=(
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"/dev/disk/by-path/ip-$target_ip:$target_port-iscsi-$target_name-lun-$lun_id"
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)
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done
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tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
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# Configure the iSCSI initiator
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iscsiadm --mode discoverydb --type sendtargets --portal "$target_ip" --discover
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --login
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udevadm settle
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# Check if all device symlinks are valid and if all expected device symlinks exist
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for link in "${expected_symlinks[@]}"; do
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# We need to do some active waiting anyway, as it may take kernel a bit
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# to attach the newly connected SCSI devices
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helper_wait_for_dev "$link"
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test -e "$link"
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done
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udevadm settle
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helper_check_device_symlinks
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# Cleanup
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --logout
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tgtadm --lld iscsi --op delete --mode target --tid=1
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echo "iSCSI LUNs backed by files + LVM"
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# Note: we use files here to "trick" LVM the disks are indeed on a different
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# host, so it doesn't automagically detect another path to the backing
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# device once we disconnect the iSCSI devices
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target_name="iqn.2021-09.com.example:iscsi.lvm.test"
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mpoint="$(mktemp -d /iscsi_storeXXX)"
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expected_symlinks=()
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# Use the first device as it's configured with larger capacity
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mkfs.ext4 -L iscsi_store "${devices[0]}"
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udevadm settle
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mount "${devices[0]}" "$mpoint"
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for i in {1..4}; do
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dd if=/dev/zero of="$mpoint/lun$i.img" bs=1M count=32
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done
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# Initialize a new iSCSI target <$target_name> consisting of 4 LUNs, each
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# backed by a file
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tgtadm --lld iscsi --op new --mode target --tid=2 --targetname "$target_name"
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# lun-0 is reserved by iSCSI
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for i in {1..4}; do
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tgtadm --lld iscsi --op new --mode logicalunit --tid 2 --lun "$i" -b "$mpoint/lun$i.img"
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tgtadm --lld iscsi --op update --mode logicalunit --tid 2 --lun "$i"
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expected_symlinks+=(
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"/dev/disk/by-path/ip-$target_ip:$target_port-iscsi-$target_name-lun-$i"
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)
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done
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tgtadm --lld iscsi --op bind --mode target --tid 2 -I ALL
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# Configure the iSCSI initiator
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iscsiadm --mode discoverydb --type sendtargets --portal "$target_ip" --discover
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --login
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udevadm settle
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# Check if all device symlinks are valid and if all expected device symlinks exist
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for link in "${expected_symlinks[@]}"; do
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# We need to do some active waiting anyway, as it may take kernel a bit
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# to attach the newly connected SCSI devices
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helper_wait_for_dev "$link"
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test -e "$link"
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done
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udevadm settle
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helper_check_device_symlinks
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# Add all iSCSI devices into a LVM volume group, create two logical volumes,
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# and check if necessary symlinks exist (and are valid)
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lvm pvcreate -y "${expected_symlinks[@]}"
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lvm pvs
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lvm vgcreate "$vgroup" -y "${expected_symlinks[@]}"
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lvm vgs
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lvm vgchange -ay "$vgroup"
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lvm lvcreate -y -L 4M "$vgroup" -n mypart1
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lvm lvcreate -y -L 8M "$vgroup" -n mypart2
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lvm lvs
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udevadm settle
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test -e "/dev/$vgroup/mypart1"
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test -e "/dev/$vgroup/mypart2"
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mkfs.ext4 -L mylvpart1 "/dev/$vgroup/mypart1"
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udevadm settle
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test -e "/dev/disk/by-label/mylvpart1"
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helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
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# Disconnect the iSCSI devices and check all the symlinks
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --logout
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# "Reset" the DM state, since we yanked the backing storage from under the LVM,
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# so the currently active VGs/LVs are invalid
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dmsetup remove_all --deferred
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udevadm settle
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# The LVM and iSCSI related symlinks should be gone
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test ! -e "/dev/$vgroup"
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test ! -e "/dev/disk/by-label/mylvpart1"
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for link in "${expected_symlinks[@]}"; do
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test ! -e "$link"
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done
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helper_check_device_symlinks "/dev/disk"
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# Reconnect the iSCSI devices and check if everything get detected correctly
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iscsiadm --mode discoverydb --type sendtargets --portal "$target_ip" --discover
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --login
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udevadm settle
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for link in "${expected_symlinks[@]}"; do
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helper_wait_for_dev "$link"
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helper_wait_for_pvscan "$link"
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test -e "$link"
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done
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udevadm settle
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test -e "/dev/$vgroup/mypart1"
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test -e "/dev/$vgroup/mypart2"
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test -e "/dev/disk/by-label/mylvpart1"
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helper_check_device_symlinks "/dev/disk" "/dev/$vgroup"
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# Cleanup
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iscsiadm --mode node --targetname "$target_name" --portal "$target_ip:$target_port" --logout
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tgtadm --lld iscsi --op delete --mode target --tid=2
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umount "$mpoint"
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rm -rf "$mpoint"
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}
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: >/failed
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udevadm settle
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