xref: /linux/tools/testing/selftests/efivarfs/efivarfs.sh (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) 
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4efivarfs_mount=/sys/firmware/efi/efivars
5test_guid=210be57c-9849-4fc7-a635-e6382d1aec27
6
7# Kselftest framework requirement - SKIP code is 4.
8ksft_skip=4
9
10file_cleanup()
11{
12	chattr -i $1
13	rm -f $1
14}
15
16check_prereqs()
17{
18	local msg="skip all tests:"
19
20	if [ $UID != 0 ]; then
21		echo $msg must be run as root >&2
22		exit $ksft_skip
23	fi
24
25	if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
26		echo $msg efivarfs is not mounted on $efivarfs_mount >&2
27		exit $ksft_skip
28	fi
29}
30
31run_test()
32{
33	local test="$1"
34
35	echo "--------------------"
36	echo "running $test"
37	echo "--------------------"
38
39	if [ "$(type -t $test)" = 'function' ]; then
40		( $test )
41	else
42		( ./$test )
43	fi
44
45	if [ $? -ne 0 ]; then
46		echo "  [FAIL]"
47		rc=1
48	else
49		echo "  [PASS]"
50	fi
51}
52
53test_create()
54{
55	local attrs='\x07\x00\x00\x00'
56	local file=$efivarfs_mount/$FUNCNAME-$test_guid
57
58	printf "$attrs\x00" > $file
59
60	if [ ! -e $file ]; then
61		echo "$file couldn't be created" >&2
62		exit 1
63	fi
64
65	if [ $(stat -c %s $file) -ne 5 ]; then
66		echo "$file has invalid size" >&2
67		file_cleanup $file
68		exit 1
69	fi
70	file_cleanup $file
71}
72
73test_create_empty()
74{
75	local file=$efivarfs_mount/$FUNCNAME-$test_guid
76
77	: > $file
78
79	if [ ! -e $file ]; then
80		echo "$file can not be created without writing" >&2
81		exit 1
82	fi
83	file_cleanup $file
84}
85
86test_create_read()
87{
88	local file=$efivarfs_mount/$FUNCNAME-$test_guid
89	./create-read $file
90	if [ $? -ne 0 ]; then
91		echo "create and read $file failed"
92		file_cleanup $file
93		exit 1
94	fi
95	file_cleanup $file
96}
97
98test_delete()
99{
100	local attrs='\x07\x00\x00\x00'
101	local file=$efivarfs_mount/$FUNCNAME-$test_guid
102
103	printf "$attrs\x00" > $file
104
105	if [ ! -e $file ]; then
106		echo "$file couldn't be created" >&2
107		exit 1
108	fi
109
110	file_cleanup $file
111
112	if [ -e $file ]; then
113		echo "$file couldn't be deleted" >&2
114		exit 1
115	fi
116
117}
118
119# test that we can remove a variable by issuing a write with only
120# attributes specified
121test_zero_size_delete()
122{
123	local attrs='\x07\x00\x00\x00'
124	local file=$efivarfs_mount/$FUNCNAME-$test_guid
125
126	printf "$attrs\x00" > $file
127
128	if [ ! -e $file ]; then
129		echo "$file does not exist" >&2
130		exit 1
131	fi
132
133	chattr -i $file
134	printf "$attrs" > $file
135
136	if [ -e $file ]; then
137		echo "$file should have been deleted" >&2
138		exit 1
139	fi
140}
141
142test_open_unlink()
143{
144	local file=$efivarfs_mount/$FUNCNAME-$test_guid
145	./open-unlink $file
146}
147
148# test that we can create a range of filenames
149test_valid_filenames()
150{
151	local attrs='\x07\x00\x00\x00'
152	local ret=0
153
154	local file_list="abc dump-type0-11-1-1362436005 1234 -"
155	for f in $file_list; do
156		local file=$efivarfs_mount/$f-$test_guid
157
158		printf "$attrs\x00" > $file
159
160		if [ ! -e $file ]; then
161			echo "$file could not be created" >&2
162			ret=1
163		else
164			file_cleanup $file
165		fi
166	done
167
168	exit $ret
169}
170
171test_invalid_filenames()
172{
173	local attrs='\x07\x00\x00\x00'
174	local ret=0
175
176	local file_list="
177		-1234-1234-1234-123456789abc
178		foo
179		foo-bar
180		-foo-
181		foo-barbazba-foob-foob-foob-foobarbazfoo
182		foo-------------------------------------
183		-12345678-1234-1234-1234-123456789abc
184		a-12345678=1234-1234-1234-123456789abc
185		a-12345678-1234=1234-1234-123456789abc
186		a-12345678-1234-1234=1234-123456789abc
187		a-12345678-1234-1234-1234=123456789abc
188		1112345678-1234-1234-1234-123456789abc"
189
190	for f in $file_list; do
191		local file=$efivarfs_mount/$f
192
193		printf "$attrs\x00" 2>/dev/null > $file
194
195		if [ -e $file ]; then
196			echo "Creating $file should have failed" >&2
197			file_cleanup $file
198			ret=1
199		fi
200	done
201
202	exit $ret
203}
204
205check_prereqs
206
207rc=0
208
209run_test test_create
210run_test test_create_empty
211run_test test_create_read
212run_test test_delete
213run_test test_zero_size_delete
214run_test test_open_unlink
215run_test test_valid_filenames
216run_test test_invalid_filenames
217
218exit $rc
219