projects / mirror_zfs.git / blame
| Commit | Line | Data |
|---|---|---|
| d1261452 JG |
1 | #!/bin/ksh -p |
| 2 | # | |
| 3 | # CDDL HEADER START | |
| 4 | # | |
| 5 | # The contents of this file are subject to the terms of the | |
| 6 | # Common Development and Distribution License (the "License"). | |
| 7 | # You may not use this file except in compliance with the License. | |
| 8 | # | |
| 9 | # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 10 | # or http://www.opensolaris.org/os/licensing. | |
| 11 | # See the License for the specific language governing permissions | |
| 12 | # and limitations under the License. | |
| 13 | # | |
| 14 | # When distributing Covered Code, include this CDDL HEADER in each | |
| 15 | # file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 16 | # If applicable, add the following below this CDDL HEADER, with the | |
| 17 | # fields enclosed by brackets "[]" replaced with your own identifying | |
| 18 | # information: Portions Copyright [yyyy] [name of copyright owner] | |
| 19 | # | |
| 20 | # CDDL HEADER END | |
| 21 | # | |
| 22 | ||
| 23 | # | |
| 24 | # Copyright (c) 2018 by Delphix. All rights reserved. | |
| 25 | # | |
| 26 | ||
| 27 | . $STF_SUITE/include/libtest.shlib | |
| 28 | ||
| 29 | # | |
| 30 | # DESCRIPTION: | |
| 31 | # Make sure errors caused by messages being dropped from the list backing the | |
| 32 | # procfs file are handled gracefully. | |
| 33 | # | |
| 34 | # STRATEGY: | |
| 35 | # 1. Make sure a few entries have been logged. | |
| 36 | # 2. Open the procfs file and start reading from it. | |
| 37 | # 3. Write to the file to cause its contents to be dropped. | |
| 38 | # 4. Resume reading from the first instance, and check that the expected | |
| 39 | # error is received. | |
| 40 | # 5. Repeat steps 1-4, except instead of dropping all the messages by writing | |
| 41 | # to the file, cause enough new messages to be written that the old messages | |
| 42 | # are dropped. | |
| 43 | # | |
| 44 | ||
| 45 | function cleanup | |
| 46 | { | |
| 47 | echo $default_max_entries >$MAX_ENTRIES_PARAM || log_fail | |
| 48 | } | |
| 49 | ||
| 50 | function sync_n | |
| 51 | { | |
| 52 | for i in {1..$1}; do | |
| 53 | log_must zpool sync $TESTPOOL | |
| 54 | done | |
| 55 | return 0 | |
| 56 | } | |
| 57 | ||
| 58 | function do_test | |
| 59 | { | |
| 60 | typeset cmd=$1 | |
| 61 | ||
| 62 | # Clear out old entries | |
| 63 | echo 0 >$TXG_HIST || log_fail | |
| 64 | ||
| 65 | # Add some new entries | |
| 66 | sync_n 20 | |
| 67 | ||
| 68 | # Confirm that there actually is something in the file. | |
| 69 | [[ $(wc -l <$TXG_HIST) -ge 20 ]] || log_fail "expected more entries" | |
| 70 | ||
| 71 | # | |
| 72 | # Start reading file, pause and run a command that will cause the | |
| 73 | # current offset into the file to become invalid, and then try to | |
| 74 | # finish reading. | |
| 75 | # | |
| 76 | { | |
| 77 | log_must dd bs=512 count=4 >/dev/null | |
| 78 | log_must eval "$cmd" | |
| 79 | cat 2>&1 >/dev/null | log_must grep "Input/output error" | |
| 80 | } <$TXG_HIST | |
| 81 | } | |
| 82 | ||
| 83 | typeset -r TXG_HIST=/proc/spl/kstat/zfs/$TESTPOOL/txgs | |
| 84 | typeset MAX_ENTRIES_PARAM=/sys/module/zfs/parameters/zfs_txg_history | |
| 85 | typeset default_max_entries | |
| 86 | ||
| 87 | log_onexit cleanup | |
| 88 | ||
| 89 | default_max_entries=$(cat $MAX_ENTRIES_PARAM) || log_fail | |
| 90 | echo 50 >$MAX_ENTRIES_PARAM || log_fail | |
| 91 | ||
| 92 | # Clear all of the existing entries. | |
| 93 | do_test "echo 0 >$TXG_HIST" | |
| 94 | ||
| 95 | # Add enough new entries to the list that all of the old ones are dropped. | |
| 96 | do_test "sync_n 60" | |
| 97 | ||
| 98 | log_pass "Attempting to read dropped message returns expected error" |