1 // SPDX-License-Identifier: LGPL-2.1-or-later
2 /*
3 * libfdt - Flat Device Tree manipulation
4 * Testcase for fdt_path_offset()
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 */
7 #include <stdlib.h>
8 #include <stdio.h>
9 #include <string.h>
10 #include <stdint.h>
11
12 #include <libfdt.h>
13
14 #include "tests.h"
15 #include "testdata.h"
16
check_subnode(void * fdt,int parent,const char * name)17 static int check_subnode(void *fdt, int parent, const char *name)
18 {
19 int offset;
20 const struct fdt_node_header *nh;
21 uint32_t tag;
22
23 verbose_printf("Checking subnode \"%s\" of %d...", name, parent);
24 offset = fdt_subnode_offset(fdt, parent, name);
25 verbose_printf("offset %d...", offset);
26 if (offset < 0)
27 FAIL("fdt_subnode_offset(\"%s\"): %s", name, fdt_strerror(offset));
28 nh = fdt_offset_ptr(fdt, offset, sizeof(*nh));
29 verbose_printf("pointer %p\n", nh);
30 if (! nh)
31 FAIL("NULL retrieving subnode \"%s\"", name);
32
33 tag = fdt32_to_cpu(nh->tag);
34
35 if (tag != FDT_BEGIN_NODE)
36 FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
37 if (!nodename_eq(nh->name, name))
38 FAIL("Subnode name mismatch \"%s\" instead of \"%s\"",
39 nh->name, name);
40
41 return offset;
42 }
43
check_path_offset(void * fdt,char * path,int offset)44 static void check_path_offset(void *fdt, char *path, int offset)
45 {
46 int rc;
47
48 verbose_printf("Checking offset of \"%s\" is %d...\n", path, offset);
49
50 rc = fdt_path_offset(fdt, path);
51 if (rc == offset)
52 return;
53
54 if (rc < 0)
55 FAIL("fdt_path_offset(\"%s\") failed: %s",
56 path, fdt_strerror(rc));
57 else
58 FAIL("fdt_path_offset(\"%s\") returned incorrect offset"
59 " %d instead of %d", path, rc, offset);
60 }
61
check_path_offset_namelen(void * fdt,char * path,int namelen,int offset)62 static void check_path_offset_namelen(void *fdt, char *path, int namelen,
63 int offset)
64 {
65 int rc;
66
67 verbose_printf("Checking offset of \"%s\" [first %d characters]"
68 " is %d...\n", path, namelen, offset);
69
70 rc = fdt_path_offset_namelen(fdt, path, namelen);
71 if (rc == offset)
72 return;
73
74 if (rc < 0)
75 FAIL("fdt_path_offset_namelen(\"%s\", %d) failed: %s",
76 path, namelen, fdt_strerror(rc));
77 else
78 FAIL("fdt_path_offset_namelen(\"%s\", %d) returned incorrect"
79 " offset %d instead of %d", path, namelen, rc, offset);
80 }
81
main(int argc,char * argv[])82 int main(int argc, char *argv[])
83 {
84 void *fdt;
85 int subnode1_offset, subnode2_offset;
86 int subsubnode1_offset, subsubnode2_offset, subsubnode2_offset2;
87
88 test_init(argc, argv);
89 fdt = load_blob_arg(argc, argv);
90
91 check_path_offset(fdt, "/", 0);
92
93 subnode1_offset = check_subnode(fdt, 0, "subnode@1");
94 subnode2_offset = check_subnode(fdt, 0, "subnode@2");
95
96 check_path_offset(fdt, "/subnode@1", subnode1_offset);
97 check_path_offset(fdt, "/subnode@2", subnode2_offset);
98
99 subsubnode1_offset = check_subnode(fdt, subnode1_offset, "subsubnode");
100 subsubnode2_offset = check_subnode(fdt, subnode2_offset, "subsubnode@0");
101 subsubnode2_offset2 = check_subnode(fdt, subnode2_offset, "subsubnode");
102
103 check_path_offset(fdt, "/subnode@1/subsubnode", subsubnode1_offset);
104 check_path_offset(fdt, "/subnode@2/subsubnode@0", subsubnode2_offset);
105 check_path_offset(fdt, "/subnode@2/subsubnode", subsubnode2_offset2);
106
107 /* Test paths with extraneous separators */
108 check_path_offset(fdt, "", -FDT_ERR_BADPATH);
109 check_path_offset(fdt, "//", 0);
110 check_path_offset(fdt, "///", 0);
111 check_path_offset(fdt, "//subnode@1", subnode1_offset);
112 check_path_offset(fdt, "/subnode@1/", subnode1_offset);
113 check_path_offset(fdt, "//subnode@1///", subnode1_offset);
114 check_path_offset(fdt, "/subnode@2////subsubnode", subsubnode2_offset2);
115
116 /* Test fdt_path_offset_namelen() */
117 check_path_offset_namelen(fdt, "/subnode@1", -1, -FDT_ERR_BADPATH);
118 check_path_offset_namelen(fdt, "/subnode@1", 0, -FDT_ERR_BADPATH);
119 check_path_offset_namelen(fdt, "/subnode@1", 1, 0);
120 check_path_offset_namelen(fdt, "/subnode@1/subsubnode", 10, subnode1_offset);
121 check_path_offset_namelen(fdt, "/subnode@1/subsubnode", 11, subnode1_offset);
122 check_path_offset_namelen(fdt, "/subnode@2TRAILINGGARBAGE", 10, subnode2_offset);
123 check_path_offset_namelen(fdt, "/subnode@2TRAILINGGARBAGE", 11, -FDT_ERR_NOTFOUND);
124 check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 23, subsubnode2_offset2);
125 check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 22, -FDT_ERR_NOTFOUND);
126 check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 24, subsubnode2_offset2);
127 check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 25, -FDT_ERR_NOTFOUND);
128
129 PASS();
130 }
131