1 // SPDX-License-Identifier: GPL-2.0
6 #include <test_progs.h>
8 __u32 get_map_id(struct bpf_object *obj, const char *name)
10 struct bpf_map_info map_info = {};
11 __u32 map_info_len, duration = 0;
15 map_info_len = sizeof(map_info);
17 map = bpf_object__find_map_by_name(obj, name);
18 if (CHECK(!map, "find map", "NULL map"))
21 err = bpf_obj_get_info_by_fd(bpf_map__fd(map),
22 &map_info, &map_info_len);
23 CHECK(err, "get map info", "err %d errno %d", err, errno);
27 void test_pinning(void)
29 const char *file_invalid = "./test_pinning_invalid.o";
30 const char *custpinpath = "/sys/fs/bpf/custom/pinmap";
31 const char *nopinpath = "/sys/fs/bpf/nopinmap";
32 const char *nopinpath2 = "/sys/fs/bpf/nopinmap2";
33 const char *custpath = "/sys/fs/bpf/custom";
34 const char *pinpath = "/sys/fs/bpf/pinmap";
35 const char *file = "./test_pinning.o";
36 __u32 map_id, map_id2, duration = 0;
37 struct stat statbuf = {};
38 struct bpf_object *obj;
41 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
42 .pin_root_path = custpath,
45 /* check that opening fails with invalid pinning value in map def */
46 obj = bpf_object__open_file(file_invalid, NULL);
47 err = libbpf_get_error(obj);
48 if (CHECK(err != -EINVAL, "invalid open", "err %d errno %d\n", err, errno)) {
53 /* open the valid object file */
54 obj = bpf_object__open_file(file, NULL);
55 err = libbpf_get_error(obj);
56 if (CHECK(err, "default open", "err %d errno %d\n", err, errno)) {
61 err = bpf_object__load(obj);
62 if (CHECK(err, "default load", "err %d errno %d\n", err, errno))
65 /* check that pinmap was pinned */
66 err = stat(pinpath, &statbuf);
67 if (CHECK(err, "stat pinpath", "err %d errno %d\n", err, errno))
70 /* check that nopinmap was *not* pinned */
71 err = stat(nopinpath, &statbuf);
72 if (CHECK(!err || errno != ENOENT, "stat nopinpath",
73 "err %d errno %d\n", err, errno))
76 /* check that nopinmap2 was *not* pinned */
77 err = stat(nopinpath2, &statbuf);
78 if (CHECK(!err || errno != ENOENT, "stat nopinpath2",
79 "err %d errno %d\n", err, errno))
82 map_id = get_map_id(obj, "pinmap");
86 bpf_object__close(obj);
88 obj = bpf_object__open_file(file, NULL);
89 if (CHECK_FAIL(libbpf_get_error(obj))) {
94 err = bpf_object__load(obj);
95 if (CHECK(err, "default load", "err %d errno %d\n", err, errno))
98 /* check that same map ID was reused for second load */
99 map_id2 = get_map_id(obj, "pinmap");
100 if (CHECK(map_id != map_id2, "check reuse",
101 "err %d errno %d id %d id2 %d\n", err, errno, map_id, map_id2))
104 /* should be no-op to re-pin same map */
105 map = bpf_object__find_map_by_name(obj, "pinmap");
106 if (CHECK(!map, "find map", "NULL map"))
109 err = bpf_map__pin(map, NULL);
110 if (CHECK(err, "re-pin map", "err %d errno %d\n", err, errno))
113 /* but error to pin at different location */
114 err = bpf_map__pin(map, "/sys/fs/bpf/other");
115 if (CHECK(!err, "pin map different", "err %d errno %d\n", err, errno))
118 /* unpin maps with a pin_path set */
119 err = bpf_object__unpin_maps(obj, NULL);
120 if (CHECK(err, "unpin maps", "err %d errno %d\n", err, errno))
123 /* and re-pin them... */
124 err = bpf_object__pin_maps(obj, NULL);
125 if (CHECK(err, "pin maps", "err %d errno %d\n", err, errno))
128 /* set pinning path of other map and re-pin all */
129 map = bpf_object__find_map_by_name(obj, "nopinmap");
130 if (CHECK(!map, "find map", "NULL map"))
133 err = bpf_map__set_pin_path(map, custpinpath);
134 if (CHECK(err, "set pin path", "err %d errno %d\n", err, errno))
137 /* should only pin the one unpinned map */
138 err = bpf_object__pin_maps(obj, NULL);
139 if (CHECK(err, "pin maps", "err %d errno %d\n", err, errno))
142 /* check that nopinmap was pinned at the custom path */
143 err = stat(custpinpath, &statbuf);
144 if (CHECK(err, "stat custpinpath", "err %d errno %d\n", err, errno))
147 /* remove the custom pin path to re-test it with auto-pinning below */
148 err = unlink(custpinpath);
149 if (CHECK(err, "unlink custpinpath", "err %d errno %d\n", err, errno))
152 err = rmdir(custpath);
153 if (CHECK(err, "rmdir custpindir", "err %d errno %d\n", err, errno))
156 bpf_object__close(obj);
158 /* open the valid object file again */
159 obj = bpf_object__open_file(file, NULL);
160 err = libbpf_get_error(obj);
161 if (CHECK(err, "default open", "err %d errno %d\n", err, errno)) {
166 /* set pin paths so that nopinmap2 will attempt to reuse the map at
167 * pinpath (which will fail), but not before pinmap has already been
170 bpf_object__for_each_map(map, obj) {
171 if (!strcmp(bpf_map__name(map), "nopinmap"))
172 err = bpf_map__set_pin_path(map, nopinpath2);
173 else if (!strcmp(bpf_map__name(map), "nopinmap2"))
174 err = bpf_map__set_pin_path(map, pinpath);
178 if (CHECK(err, "set pin path", "err %d errno %d\n", err, errno))
182 /* should fail because of map parameter mismatch */
183 err = bpf_object__load(obj);
184 if (CHECK(err != -EINVAL, "param mismatch load", "err %d errno %d\n", err, errno))
187 /* nopinmap2 should have been pinned and cleaned up again */
188 err = stat(nopinpath2, &statbuf);
189 if (CHECK(!err || errno != ENOENT, "stat nopinpath2",
190 "err %d errno %d\n", err, errno))
193 /* pinmap should still be there */
194 err = stat(pinpath, &statbuf);
195 if (CHECK(err, "stat pinpath", "err %d errno %d\n", err, errno))
198 bpf_object__close(obj);
200 /* test auto-pinning at custom path with open opt */
201 obj = bpf_object__open_file(file, &opts);
202 if (CHECK_FAIL(libbpf_get_error(obj))) {
207 err = bpf_object__load(obj);
208 if (CHECK(err, "custom load", "err %d errno %d\n", err, errno))
211 /* check that pinmap was pinned at the custom path */
212 err = stat(custpinpath, &statbuf);
213 if (CHECK(err, "stat custpinpath", "err %d errno %d\n", err, errno))
223 bpf_object__close(obj);