Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'netconsole-selftest-for-userdata-overflow'
Breno Leitao says:
====================
netconsole: selftest for userdata overflow
Implement comprehensive testing for netconsole userdata entry handling,
demonstrating correct behavior when creating maximum entries and
preventing unauthorized overflow.
Refactor existing test infrastructure to support modular, reusable
helper functions that validate strict entry limit enforcement.
Also, add a warning if update_userdata() sees more than
MAX_USERDATA_ITEMS entries. This shouldn't happen and it is a bug that
shouldn't be silently ignored.
v2: https://lore.kernel.org/20250103-netcons_overflow_test-v2-0-a49f9be64c21@debian.org
v1: https://lore.kernel.org/20241204-netcons_overflow_test-v1-0-a85a8d0ace21@debian.org
====================
Link: https://patch.msgid.link/20250108-netcons_overflow_test-v3-0-3d85eb091bec@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+298
-219
+2
-1
MAINTAINERS
+2
-1
MAINTAINERS
···
16170
16170
S: Maintained
16171
16171
F: Documentation/networking/netconsole.rst
16172
16172
F: drivers/net/netconsole.c
16173
-
F: tools/testing/selftests/drivers/net/netcons_basic.sh
16173
+
F: tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
16174
+
F: tools/testing/selftests/drivers/net/netcons\*
16174
16175
16175
16176
NETDEVSIM
16176
16177
M: Jakub Kicinski <kuba@kernel.org>
+1
-1
drivers/net/netconsole.c
+1
-1
drivers/net/netconsole.c
+2
tools/testing/selftests/drivers/net/Makefile
+2
tools/testing/selftests/drivers/net/Makefile
···
1
1
# SPDX-License-Identifier: GPL-2.0
2
2
3
3
TEST_INCLUDES := $(wildcard lib/py/*.py) \
4
+
$(wildcard lib/sh/*.sh) \
4
5
../../net/net_helper.sh \
5
6
../../net/lib.sh \
6
7
7
8
TEST_PROGS := \
8
9
netcons_basic.sh \
10
+
netcons_overflow.sh \
9
11
ping.py \
10
12
queues.py \
11
13
stats.py \
+225
tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
+225
tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh
···
1
+
#!/usr/bin/env bash
2
+
# SPDX-License-Identifier: GPL-2.0
3
+
4
+
# This file contains functions and helpers to support the netconsole
5
+
# selftests
6
+
#
7
+
# Author: Breno Leitao <leitao@debian.org>
8
+
9
+
set -euo pipefail
10
+
11
+
LIBDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
12
+
13
+
SRCIF="" # to be populated later
14
+
SRCIP=192.0.2.1
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+
DSTIF="" # to be populated later
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+
DSTIP=192.0.2.2
17
+
18
+
PORT="6666"
19
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MSG="netconsole selftest"
20
+
USERDATA_KEY="key"
21
+
USERDATA_VALUE="value"
22
+
TARGET=$(mktemp -u netcons_XXXXX)
23
+
DEFAULT_PRINTK_VALUES=$(cat /proc/sys/kernel/printk)
24
+
NETCONS_CONFIGFS="/sys/kernel/config/netconsole"
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+
NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}"
26
+
# NAMESPACE will be populated by setup_ns with a random value
27
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NAMESPACE=""
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+
29
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# IDs for netdevsim
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NSIM_DEV_1_ID=$((256 + RANDOM % 256))
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+
NSIM_DEV_2_ID=$((512 + RANDOM % 256))
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NSIM_DEV_SYS_NEW="/sys/bus/netdevsim/new_device"
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+
34
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# Used to create and delete namespaces
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source "${LIBDIR}"/../../../../net/lib.sh
36
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source "${LIBDIR}"/../../../../net/net_helper.sh
37
+
38
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# Create netdevsim interfaces
39
+
create_ifaces() {
40
+
41
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echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_NEW"
42
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echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_NEW"
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udevadm settle 2> /dev/null || true
44
+
45
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local NSIM1=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_1_ID"
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local NSIM2=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_2_ID"
47
+
48
+
# These are global variables
49
+
SRCIF=$(find "$NSIM1"/net -maxdepth 1 -type d ! \
50
+
-path "$NSIM1"/net -exec basename {} \;)
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+
DSTIF=$(find "$NSIM2"/net -maxdepth 1 -type d ! \
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-path "$NSIM2"/net -exec basename {} \;)
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+
}
54
+
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+
link_ifaces() {
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local NSIM_DEV_SYS_LINK="/sys/bus/netdevsim/link_device"
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local SRCIF_IFIDX=$(cat /sys/class/net/"$SRCIF"/ifindex)
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local DSTIF_IFIDX=$(cat /sys/class/net/"$DSTIF"/ifindex)
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+
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exec {NAMESPACE_FD}</var/run/netns/"${NAMESPACE}"
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exec {INITNS_FD}</proc/self/ns/net
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+
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# Bind the dst interface to namespace
64
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ip link set "${DSTIF}" netns "${NAMESPACE}"
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+
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# Linking one device to the other one (on the other namespace}
67
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if ! echo "${INITNS_FD}:$SRCIF_IFIDX $NAMESPACE_FD:$DSTIF_IFIDX" > $NSIM_DEV_SYS_LINK
68
+
then
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echo "linking netdevsim1 with netdevsim2 should succeed"
70
+
cleanup
71
+
exit "${ksft_skip}"
72
+
fi
73
+
}
74
+
75
+
function configure_ip() {
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# Configure the IPs for both interfaces
77
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ip netns exec "${NAMESPACE}" ip addr add "${DSTIP}"/24 dev "${DSTIF}"
78
+
ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" up
79
+
80
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ip addr add "${SRCIP}"/24 dev "${SRCIF}"
81
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ip link set "${SRCIF}" up
82
+
}
83
+
84
+
function set_network() {
85
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# setup_ns function is coming from lib.sh
86
+
setup_ns NAMESPACE
87
+
88
+
# Create both interfaces, and assign the destination to a different
89
+
# namespace
90
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create_ifaces
91
+
92
+
# Link both interfaces back to back
93
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link_ifaces
94
+
95
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configure_ip
96
+
}
97
+
98
+
function create_dynamic_target() {
99
+
DSTMAC=$(ip netns exec "${NAMESPACE}" \
100
+
ip link show "${DSTIF}" | awk '/ether/ {print $2}')
101
+
102
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# Create a dynamic target
103
+
mkdir "${NETCONS_PATH}"
104
+
105
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echo "${DSTIP}" > "${NETCONS_PATH}"/remote_ip
106
+
echo "${SRCIP}" > "${NETCONS_PATH}"/local_ip
107
+
echo "${DSTMAC}" > "${NETCONS_PATH}"/remote_mac
108
+
echo "${SRCIF}" > "${NETCONS_PATH}"/dev_name
109
+
110
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echo 1 > "${NETCONS_PATH}"/enabled
111
+
}
112
+
113
+
function cleanup() {
114
+
local NSIM_DEV_SYS_DEL="/sys/bus/netdevsim/del_device"
115
+
116
+
# delete netconsole dynamic reconfiguration
117
+
echo 0 > "${NETCONS_PATH}"/enabled
118
+
# Remove all the keys that got created during the selftest
119
+
find "${NETCONS_PATH}/userdata/" -mindepth 1 -type d -delete
120
+
# Remove the configfs entry
121
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rmdir "${NETCONS_PATH}"
122
+
123
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# Delete netdevsim devices
124
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echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_DEL"
125
+
echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_DEL"
126
+
127
+
# this is coming from lib.sh
128
+
cleanup_all_ns
129
+
130
+
# Restoring printk configurations
131
+
echo "${DEFAULT_PRINTK_VALUES}" > /proc/sys/kernel/printk
132
+
}
133
+
134
+
function set_user_data() {
135
+
if [[ ! -d "${NETCONS_PATH}""/userdata" ]]
136
+
then
137
+
echo "Userdata path not available in ${NETCONS_PATH}/userdata"
138
+
exit "${ksft_skip}"
139
+
fi
140
+
141
+
KEY_PATH="${NETCONS_PATH}/userdata/${USERDATA_KEY}"
142
+
mkdir -p "${KEY_PATH}"
143
+
VALUE_PATH="${KEY_PATH}""/value"
144
+
echo "${USERDATA_VALUE}" > "${VALUE_PATH}"
145
+
}
146
+
147
+
function listen_port_and_save_to() {
148
+
local OUTPUT=${1}
149
+
# Just wait for 2 seconds
150
+
timeout 2 ip netns exec "${NAMESPACE}" \
151
+
socat UDP-LISTEN:"${PORT}",fork "${OUTPUT}"
152
+
}
153
+
154
+
function validate_result() {
155
+
local TMPFILENAME="$1"
156
+
157
+
# TMPFILENAME will contain something like:
158
+
# 6.11.1-0_fbk0_rc13_509_g30d75cea12f7,13,1822,115075213798,-;netconsole selftest: netcons_gtJHM
159
+
# key=value
160
+
161
+
# Check if the file exists
162
+
if [ ! -f "$TMPFILENAME" ]; then
163
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echo "FAIL: File was not generated." >&2
164
+
exit "${ksft_fail}"
165
+
fi
166
+
167
+
if ! grep -q "${MSG}" "${TMPFILENAME}"; then
168
+
echo "FAIL: ${MSG} not found in ${TMPFILENAME}" >&2
169
+
cat "${TMPFILENAME}" >&2
170
+
exit "${ksft_fail}"
171
+
fi
172
+
173
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if ! grep -q "${USERDATA_KEY}=${USERDATA_VALUE}" "${TMPFILENAME}"; then
174
+
echo "FAIL: ${USERDATA_KEY}=${USERDATA_VALUE} not found in ${TMPFILENAME}" >&2
175
+
cat "${TMPFILENAME}" >&2
176
+
exit "${ksft_fail}"
177
+
fi
178
+
179
+
# Delete the file once it is validated, otherwise keep it
180
+
# for debugging purposes
181
+
rm "${TMPFILENAME}"
182
+
exit "${ksft_pass}"
183
+
}
184
+
185
+
function check_for_dependencies() {
186
+
if [ "$(id -u)" -ne 0 ]; then
187
+
echo "This test must be run as root" >&2
188
+
exit "${ksft_skip}"
189
+
fi
190
+
191
+
if ! which socat > /dev/null ; then
192
+
echo "SKIP: socat(1) is not available" >&2
193
+
exit "${ksft_skip}"
194
+
fi
195
+
196
+
if ! which ip > /dev/null ; then
197
+
echo "SKIP: ip(1) is not available" >&2
198
+
exit "${ksft_skip}"
199
+
fi
200
+
201
+
if ! which udevadm > /dev/null ; then
202
+
echo "SKIP: udevadm(1) is not available" >&2
203
+
exit "${ksft_skip}"
204
+
fi
205
+
206
+
if [ ! -f "${NSIM_DEV_SYS_NEW}" ]; then
207
+
echo "SKIP: file ${NSIM_DEV_SYS_NEW} does not exist. Check if CONFIG_NETDEVSIM is enabled" >&2
208
+
exit "${ksft_skip}"
209
+
fi
210
+
211
+
if [ ! -d "${NETCONS_CONFIGFS}" ]; then
212
+
echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2
213
+
exit "${ksft_skip}"
214
+
fi
215
+
216
+
if ip link show "${DSTIF}" 2> /dev/null; then
217
+
echo "SKIP: interface ${DSTIF} exists in the system. Not overwriting it." >&2
218
+
exit "${ksft_skip}"
219
+
fi
220
+
221
+
if ip addr list | grep -E "inet.*(${SRCIP}|${DSTIP})" 2> /dev/null; then
222
+
echo "SKIP: IPs already in use. Skipping it" >&2
223
+
exit "${ksft_skip}"
224
+
fi
225
+
}
+1
-217
tools/testing/selftests/drivers/net/netcons_basic.sh
+1
-217
tools/testing/selftests/drivers/net/netcons_basic.sh
···
18
18
19
19
SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
20
20
21
-
# Simple script to test dynamic targets in netconsole
22
-
SRCIF="" # to be populated later
23
-
SRCIP=192.0.2.1
24
-
DSTIF="" # to be populated later
25
-
DSTIP=192.0.2.2
21
+
source "${SCRIPTDIR}"/lib/sh/lib_netcons.sh
26
22
27
-
PORT="6666"
28
-
MSG="netconsole selftest"
29
-
USERDATA_KEY="key"
30
-
USERDATA_VALUE="value"
31
-
TARGET=$(mktemp -u netcons_XXXXX)
32
-
DEFAULT_PRINTK_VALUES=$(cat /proc/sys/kernel/printk)
33
-
NETCONS_CONFIGFS="/sys/kernel/config/netconsole"
34
-
NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}"
35
-
KEY_PATH="${NETCONS_PATH}/userdata/${USERDATA_KEY}"
36
-
# NAMESPACE will be populated by setup_ns with a random value
37
-
NAMESPACE=""
38
-
39
-
# IDs for netdevsim
40
-
NSIM_DEV_1_ID=$((256 + RANDOM % 256))
41
-
NSIM_DEV_2_ID=$((512 + RANDOM % 256))
42
-
NSIM_DEV_SYS_NEW="/sys/bus/netdevsim/new_device"
43
-
44
-
# Used to create and delete namespaces
45
-
source "${SCRIPTDIR}"/../../net/lib.sh
46
-
source "${SCRIPTDIR}"/../../net/net_helper.sh
47
-
48
-
# Create netdevsim interfaces
49
-
create_ifaces() {
50
-
51
-
echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_NEW"
52
-
echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_NEW"
53
-
udevadm settle 2> /dev/null || true
54
-
55
-
local NSIM1=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_1_ID"
56
-
local NSIM2=/sys/bus/netdevsim/devices/netdevsim"$NSIM_DEV_2_ID"
57
-
58
-
# These are global variables
59
-
SRCIF=$(find "$NSIM1"/net -maxdepth 1 -type d ! \
60
-
-path "$NSIM1"/net -exec basename {} \;)
61
-
DSTIF=$(find "$NSIM2"/net -maxdepth 1 -type d ! \
62
-
-path "$NSIM2"/net -exec basename {} \;)
63
-
}
64
-
65
-
link_ifaces() {
66
-
local NSIM_DEV_SYS_LINK="/sys/bus/netdevsim/link_device"
67
-
local SRCIF_IFIDX=$(cat /sys/class/net/"$SRCIF"/ifindex)
68
-
local DSTIF_IFIDX=$(cat /sys/class/net/"$DSTIF"/ifindex)
69
-
70
-
exec {NAMESPACE_FD}</var/run/netns/"${NAMESPACE}"
71
-
exec {INITNS_FD}</proc/self/ns/net
72
-
73
-
# Bind the dst interface to namespace
74
-
ip link set "${DSTIF}" netns "${NAMESPACE}"
75
-
76
-
# Linking one device to the other one (on the other namespace}
77
-
if ! echo "${INITNS_FD}:$SRCIF_IFIDX $NAMESPACE_FD:$DSTIF_IFIDX" > $NSIM_DEV_SYS_LINK
78
-
then
79
-
echo "linking netdevsim1 with netdevsim2 should succeed"
80
-
cleanup
81
-
exit "${ksft_skip}"
82
-
fi
83
-
}
84
-
85
-
function configure_ip() {
86
-
# Configure the IPs for both interfaces
87
-
ip netns exec "${NAMESPACE}" ip addr add "${DSTIP}"/24 dev "${DSTIF}"
88
-
ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" up
89
-
90
-
ip addr add "${SRCIP}"/24 dev "${SRCIF}"
91
-
ip link set "${SRCIF}" up
92
-
}
93
-
94
-
function set_network() {
95
-
# setup_ns function is coming from lib.sh
96
-
setup_ns NAMESPACE
97
-
98
-
# Create both interfaces, and assign the destination to a different
99
-
# namespace
100
-
create_ifaces
101
-
102
-
# Link both interfaces back to back
103
-
link_ifaces
104
-
105
-
configure_ip
106
-
}
107
-
108
-
function create_dynamic_target() {
109
-
DSTMAC=$(ip netns exec "${NAMESPACE}" \
110
-
ip link show "${DSTIF}" | awk '/ether/ {print $2}')
111
-
112
-
# Create a dynamic target
113
-
mkdir "${NETCONS_PATH}"
114
-
115
-
echo "${DSTIP}" > "${NETCONS_PATH}"/remote_ip
116
-
echo "${SRCIP}" > "${NETCONS_PATH}"/local_ip
117
-
echo "${DSTMAC}" > "${NETCONS_PATH}"/remote_mac
118
-
echo "${SRCIF}" > "${NETCONS_PATH}"/dev_name
119
-
120
-
echo 1 > "${NETCONS_PATH}"/enabled
121
-
}
122
-
123
-
function cleanup() {
124
-
local NSIM_DEV_SYS_DEL="/sys/bus/netdevsim/del_device"
125
-
126
-
# delete netconsole dynamic reconfiguration
127
-
echo 0 > "${NETCONS_PATH}"/enabled
128
-
# Remove key
129
-
rmdir "${KEY_PATH}"
130
-
# Remove the configfs entry
131
-
rmdir "${NETCONS_PATH}"
132
-
133
-
# Delete netdevsim devices
134
-
echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_DEL"
135
-
echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_DEL"
136
-
137
-
# this is coming from lib.sh
138
-
cleanup_all_ns
139
-
140
-
# Restoring printk configurations
141
-
echo "${DEFAULT_PRINTK_VALUES}" > /proc/sys/kernel/printk
142
-
}
143
-
144
-
function set_user_data() {
145
-
if [[ ! -d "${NETCONS_PATH}""/userdata" ]]
146
-
then
147
-
echo "Userdata path not available in ${NETCONS_PATH}/userdata"
148
-
exit "${ksft_skip}"
149
-
fi
150
-
151
-
mkdir -p "${KEY_PATH}"
152
-
VALUE_PATH="${KEY_PATH}""/value"
153
-
echo "${USERDATA_VALUE}" > "${VALUE_PATH}"
154
-
}
155
-
156
-
function listen_port_and_save_to() {
157
-
local OUTPUT=${1}
158
-
# Just wait for 2 seconds
159
-
timeout 2 ip netns exec "${NAMESPACE}" \
160
-
socat UDP-LISTEN:"${PORT}",fork "${OUTPUT}"
161
-
}
162
-
163
-
function validate_result() {
164
-
local TMPFILENAME="$1"
165
-
166
-
# TMPFILENAME will contain something like:
167
-
# 6.11.1-0_fbk0_rc13_509_g30d75cea12f7,13,1822,115075213798,-;netconsole selftest: netcons_gtJHM
168
-
# key=value
169
-
170
-
# Check if the file exists
171
-
if [ ! -f "$TMPFILENAME" ]; then
172
-
echo "FAIL: File was not generated." >&2
173
-
exit "${ksft_fail}"
174
-
fi
175
-
176
-
if ! grep -q "${MSG}" "${TMPFILENAME}"; then
177
-
echo "FAIL: ${MSG} not found in ${TMPFILENAME}" >&2
178
-
cat "${TMPFILENAME}" >&2
179
-
exit "${ksft_fail}"
180
-
fi
181
-
182
-
if ! grep -q "${USERDATA_KEY}=${USERDATA_VALUE}" "${TMPFILENAME}"; then
183
-
echo "FAIL: ${USERDATA_KEY}=${USERDATA_VALUE} not found in ${TMPFILENAME}" >&2
184
-
cat "${TMPFILENAME}" >&2
185
-
exit "${ksft_fail}"
186
-
fi
187
-
188
-
# Delete the file once it is validated, otherwise keep it
189
-
# for debugging purposes
190
-
rm "${TMPFILENAME}"
191
-
exit "${ksft_pass}"
192
-
}
193
-
194
-
function check_for_dependencies() {
195
-
if [ "$(id -u)" -ne 0 ]; then
196
-
echo "This test must be run as root" >&2
197
-
exit "${ksft_skip}"
198
-
fi
199
-
200
-
if ! which socat > /dev/null ; then
201
-
echo "SKIP: socat(1) is not available" >&2
202
-
exit "${ksft_skip}"
203
-
fi
204
-
205
-
if ! which ip > /dev/null ; then
206
-
echo "SKIP: ip(1) is not available" >&2
207
-
exit "${ksft_skip}"
208
-
fi
209
-
210
-
if ! which udevadm > /dev/null ; then
211
-
echo "SKIP: udevadm(1) is not available" >&2
212
-
exit "${ksft_skip}"
213
-
fi
214
-
215
-
if [ ! -f "${NSIM_DEV_SYS_NEW}" ]; then
216
-
echo "SKIP: file ${NSIM_DEV_SYS_NEW} does not exist. Check if CONFIG_NETDEVSIM is enabled" >&2
217
-
exit "${ksft_skip}"
218
-
fi
219
-
220
-
if [ ! -d "${NETCONS_CONFIGFS}" ]; then
221
-
echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2
222
-
exit "${ksft_skip}"
223
-
fi
224
-
225
-
if ip link show "${DSTIF}" 2> /dev/null; then
226
-
echo "SKIP: interface ${DSTIF} exists in the system. Not overwriting it." >&2
227
-
exit "${ksft_skip}"
228
-
fi
229
-
230
-
if ip addr list | grep -E "inet.*(${SRCIP}|${DSTIP})" 2> /dev/null; then
231
-
echo "SKIP: IPs already in use. Skipping it" >&2
232
-
exit "${ksft_skip}"
233
-
fi
234
-
}
235
-
236
-
# ========== #
237
-
# Start here #
238
-
# ========== #
239
23
modprobe netdevsim 2> /dev/null || true
240
24
modprobe netconsole 2> /dev/null || true
241
25
+67
tools/testing/selftests/drivers/net/netcons_overflow.sh
+67
tools/testing/selftests/drivers/net/netcons_overflow.sh
···
1
+
#!/usr/bin/env bash
2
+
# SPDX-License-Identifier: GPL-2.0
3
+
4
+
# This test verifies that users can successfully create up to
5
+
# MAX_USERDATA_ITEMS userdata entries without encountering any failures.
6
+
#
7
+
# Additionally, it tests for expected failure when attempting to exceed this
8
+
# maximum limit.
9
+
#
10
+
# Author: Breno Leitao <leitao@debian.org>
11
+
12
+
set -euo pipefail
13
+
14
+
SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
15
+
16
+
source "${SCRIPTDIR}"/lib/sh/lib_netcons.sh
17
+
# This is coming from netconsole code. Check for it in drivers/net/netconsole.c
18
+
MAX_USERDATA_ITEMS=16
19
+
20
+
# Function to create userdata entries
21
+
function create_userdata_max_entries() {
22
+
# All these keys should be created without any error
23
+
for i in $(seq $MAX_USERDATA_ITEMS)
24
+
do
25
+
# USERDATA_KEY is used by set_user_data
26
+
USERDATA_KEY="key"${i}
27
+
set_user_data
28
+
done
29
+
}
30
+
31
+
# Function to verify the entry limit
32
+
function verify_entry_limit() {
33
+
# Allowing the test to fail without exiting, since the next command
34
+
# will fail
35
+
set +e
36
+
mkdir "${NETCONS_PATH}/userdata/key_that_will_fail" 2> /dev/null
37
+
ret="$?"
38
+
set -e
39
+
if [ "$ret" -eq 0 ];
40
+
then
41
+
echo "Adding more than ${MAX_USERDATA_ITEMS} entries in userdata should fail, but it didn't" >&2
42
+
ls "${NETCONS_PATH}/userdata/" >&2
43
+
exit "${ksft_fail}"
44
+
fi
45
+
}
46
+
47
+
# ========== #
48
+
# Start here #
49
+
# ========== #
50
+
51
+
modprobe netdevsim 2> /dev/null || true
52
+
modprobe netconsole 2> /dev/null || true
53
+
54
+
# Check for basic system dependency and exit if not found
55
+
check_for_dependencies
56
+
57
+
# Remove the namespace, interfaces and netconsole target on exit
58
+
trap cleanup EXIT
59
+
# Create one namespace and two interfaces
60
+
set_network
61
+
# Create a dynamic target for netconsole
62
+
create_dynamic_target
63
+
# populate the maximum number of supported keys in userdata
64
+
create_userdata_max_entries
65
+
# Verify an additional entry is not allowed
66
+
verify_entry_limit
67
+
exit "${ksft_pass}"