diff options
Diffstat (limited to 'tests/zfs-tests/tests/functional/procfs/procfs_list_stale_read.ksh')
| -rwxr-xr-x | tests/zfs-tests/tests/functional/procfs/procfs_list_stale_read.ksh | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/tests/zfs-tests/tests/functional/procfs/procfs_list_stale_read.ksh b/tests/zfs-tests/tests/functional/procfs/procfs_list_stale_read.ksh new file mode 100755 index 000000000000..95a5e5c1ebc6 --- /dev/null +++ b/tests/zfs-tests/tests/functional/procfs/procfs_list_stale_read.ksh @@ -0,0 +1,98 @@ +#!/bin/ksh -p +# +# CDDL HEADER START +# +# The contents of this file are subject to the terms of the +# Common Development and Distribution License (the "License"). +# You may not use this file except in compliance with the License. +# +# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE +# or http://www.opensolaris.org/os/licensing. +# See the License for the specific language governing permissions +# and limitations under the License. +# +# When distributing Covered Code, include this CDDL HEADER in each +# file and include the License file at usr/src/OPENSOLARIS.LICENSE. +# If applicable, add the following below this CDDL HEADER, with the +# fields enclosed by brackets "[]" replaced with your own identifying +# information: Portions Copyright [yyyy] [name of copyright owner] +# +# CDDL HEADER END +# + +# +# Copyright (c) 2018 by Delphix. All rights reserved. +# + +. $STF_SUITE/include/libtest.shlib + +# +# DESCRIPTION: +# Make sure errors caused by messages being dropped from the list backing the +# procfs file are handled gracefully. +# +# STRATEGY: +# 1. Make sure a few entries have been logged. +# 2. Open the procfs file and start reading from it. +# 3. Write to the file to cause its contents to be dropped. +# 4. Resume reading from the first instance, and check that the expected +# error is received. +# 5. Repeat steps 1-4, except instead of dropping all the messages by writing +# to the file, cause enough new messages to be written that the old messages +# are dropped. +# + +function cleanup +{ + echo $default_max_entries >$MAX_ENTRIES_PARAM || log_fail +} + +function sync_n +{ + for i in {1..$1}; do + log_must zpool sync $TESTPOOL + done + return 0 +} + +function do_test +{ + typeset cmd=$1 + + # Clear out old entries + echo 0 >$TXG_HIST || log_fail + + # Add some new entries + sync_n 20 + + # Confirm that there actually is something in the file. + [[ $(wc -l <$TXG_HIST) -ge 20 ]] || log_fail "expected more entries" + + # + # Start reading file, pause and run a command that will cause the + # current offset into the file to become invalid, and then try to + # finish reading. + # + { + log_must dd bs=512 count=4 >/dev/null + log_must eval "$cmd" + cat 2>&1 >/dev/null | log_must grep "Input/output error" + } <$TXG_HIST +} + +typeset -r TXG_HIST=/proc/spl/kstat/zfs/$TESTPOOL/txgs +typeset MAX_ENTRIES_PARAM=/sys/module/zfs/parameters/zfs_txg_history +typeset default_max_entries + +log_onexit cleanup + +default_max_entries=$(<$MAX_ENTRIES_PARAM) || log_fail +echo 50 >$MAX_ENTRIES_PARAM || log_fail + +# Clear all of the existing entries. +do_test "echo 0 >$TXG_HIST" + +# Add enough new entries to the list that all of the old ones are dropped. +do_test "sync_n 60" + +log_pass "Attempting to read dropped message returns expected error" |