summaryrefslogtreecommitdiff
path: root/tests/qemu-iotests/common.qemu
blob: ee7ebb4c1d974f628a547071210a22d56807a5d7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
#!/bin/bash
#
# This allows for launching of multiple QEMU instances, with independent
# communication possible to each instance.
#
# Each instance can choose, at launch, to use either the QMP or the
# HMP (monitor) interface.
#
# All instances are cleaned up via _cleanup_qemu, including killing the
# running qemu instance.
#
# Copyright (C) 2014 Red Hat, Inc.
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
#

QEMU_COMM_TIMEOUT=10

QEMU_FIFO_IN="${TEST_DIR}/qmp-in-$$"
QEMU_FIFO_OUT="${TEST_DIR}/qmp-out-$$"

QEMU_PID=
_QEMU_HANDLE=0
QEMU_HANDLE=0

# If bash version is >= 4.1, these will be overwritten and dynamic
# file descriptor values assigned.
_out_fd=3
_in_fd=4

# Wait for expected QMP response from QEMU.  Will time out
# after 10 seconds, which counts as failure.
#
# Override QEMU_COMM_TIMEOUT for a timeout different than the
# default 10 seconds
#
# $1: The handle to use
# $2+ All remaining arguments comprise the string to search for
#    in the response.
#
# If $silent is set to anything but an empty string, then
# response is not echoed out.
function _timed_wait_for()
{
    local h=${1}
    shift

    QEMU_STATUS[$h]=0
    while read -t ${QEMU_COMM_TIMEOUT} resp <&${QEMU_OUT[$h]}
    do
        if [ -z "${silent}" ]; then
            echo "${resp}" | _filter_testdir | _filter_qemu \
                           | _filter_qemu_io | _filter_qmp
        fi
        grep -q "${*}" < <(echo ${resp})
        if [ $? -eq 0 ]; then
            return
        fi
    done
    QEMU_STATUS[$h]=-1
    if [ -z "${qemu_error_no_exit}" ]; then
        echo "Timeout waiting for ${*} on handle ${h}"
        exit 1  # Timeout means the test failed
    fi
}


# Sends QMP or HMP command to QEMU, and waits for the expected response
#
# $1:       QEMU handle to use
# $2:       String of the QMP command to send
# ${@: -1}  (Last string passed)
#             String that the QEMU response should contain. If it is a null
#             string, do not wait for a response
#
# Set qemu_cmd_repeat to the number of times to repeat the cmd
# until either timeout, or a response.  If it is not set, or <=0,
# then the command is only sent once.
#
# If $qemu_error_no_exit is set, then even if the expected response
# is not seen, we will not exit.  $QEMU_STATUS[$1] will be set it -1 in
# that case.
function _send_qemu_cmd()
{
    local h=${1}
    local count=1
    local cmd=
    local use_error=${qemu_error_no_exit}
    shift

    if [ ${qemu_cmd_repeat} -gt 0 ] 2>/dev/null; then
        count=${qemu_cmd_repeat}
        use_error="no"
    fi
    # This array element extraction is done to accommodate pathnames with spaces
    cmd=${@: 1:${#@}-1}
    shift $(($# - 1))

    while [ ${count} -gt 0 ]
    do
        echo "${cmd}" >&${QEMU_IN[${h}]}
        if [ -n "${1}" ]; then
            qemu_error_no_exit=${use_error} _timed_wait_for ${h} "${1}"
            if [ ${QEMU_STATUS[$h]} -eq 0 ]; then
                return
            fi
        fi
        let count--;
    done
    if [ ${QEMU_STATUS[$h]} -ne 0 ] && [ -z "${qemu_error_no_exit}" ]; then
        echo "Timeout waiting for ${1} on handle ${h}"
        exit 1 #Timeout means the test failed
    fi
}


# Launch a QEMU process.
#
# Input parameters:
# $qemu_comm_method: set this variable to 'monitor' (case insensitive)
#                    to use the QEMU HMP monitor for communication.
#                    Otherwise, the default of QMP is used.
# Returns:
# $QEMU_HANDLE: set to a handle value to communicate with this QEMU instance.
#
function _launch_qemu()
{
    local comm=
    local fifo_out=
    local fifo_in=

    if (shopt -s nocasematch; [[ "${qemu_comm_method}" == "monitor" ]])
    then
        comm="-monitor stdio"
    else
        local qemu_comm_method="qmp"
        comm="-monitor none -qmp stdio"
    fi

    fifo_out=${QEMU_FIFO_OUT}_${_QEMU_HANDLE}
    fifo_in=${QEMU_FIFO_IN}_${_QEMU_HANDLE}
    mkfifo "${fifo_out}"
    mkfifo "${fifo_in}"

    "${QEMU}" -nographic -serial none ${comm} -machine accel=qtest "${@}" 2>&1 \
                                                                >"${fifo_out}" \
                                                                <"${fifo_in}" &
    QEMU_PID[${_QEMU_HANDLE}]=$!

    if [[ "${BASH_VERSINFO[0]}" -ge "5" ||
        ("${BASH_VERSINFO[0]}" -ge "4"  &&  "${BASH_VERSINFO[1]}" -ge "1") ]]
    then
        # bash >= 4.1 required for automatic fd
        exec {_out_fd}<"${fifo_out}"
        exec {_in_fd}>"${fifo_in}"
    else
        let _out_fd++
        let _in_fd++
        eval "exec ${_out_fd}<'${fifo_out}'"
        eval "exec ${_in_fd}>'${fifo_in}'"
    fi

    QEMU_OUT[${_QEMU_HANDLE}]=${_out_fd}
    QEMU_IN[${_QEMU_HANDLE}]=${_in_fd}
    QEMU_STATUS[${_QEMU_HANDLE}]=0

    if [ "${qemu_comm_method}" == "qmp" ]
    then
        # Don't print response, since it has version information in it
        silent=yes _timed_wait_for ${_QEMU_HANDLE} "capabilities"
    fi
    QEMU_HANDLE=${_QEMU_HANDLE}
    let _QEMU_HANDLE++
}


# Silenty kills the QEMU process
function _cleanup_qemu()
{
    # QEMU_PID[], QEMU_IN[], QEMU_OUT[] all use same indices
    for i in "${!QEMU_OUT[@]}"
    do
        kill -KILL ${QEMU_PID[$i]} 2>/dev/null
        wait ${QEMU_PID[$i]} 2>/dev/null # silent kill
        rm -f "${QEMU_FIFO_IN}_${i}" "${QEMU_FIFO_OUT}_${i}"
        eval "exec ${QEMU_IN[$i]}<&-"   # close file descriptors
        eval "exec ${QEMU_OUT[$i]}<&-"
    done
}