1 /*
2 * Copyright (c) 2017-2023 Nordic Semiconductor ASA
3 * Copyright (c) 2015 Runtime Inc
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #include "fcb_test.h"
9
ZTEST(fcb_test_with_2sectors_set,test_fcb_append_too_big)10 ZTEST(fcb_test_with_2sectors_set, test_fcb_append_too_big)
11 {
12 struct fcb *fcb;
13 int rc;
14 int overhead;
15 uint32_t len;
16 struct fcb_entry elem_loc;
17 const uint8_t max_length_field_len = 2;
18
19 fcb = &test_fcb;
20
21 /*
22 * An entry in the FCB has the following structure:
23 * | fcb_disk_area | length | data | CRC |
24 *
25 * The length is encoded in 1-2 bytes. All these entries
26 * have to abide flash alignment constraints.
27 *
28 * Thus, the max element which fits inside sector is
29 * (M / fcb->f_align) * fcb->f_align, where / is integer
30 * division and M = sector size - O, with O being the sum
31 * of all overhead elements' lengths in flash, i.e.
32 *
33 * O = fcb_len_in_flash(fcb, FCB_CRC_SZ)
34 * + fcb_len_in_flash(fcb, max_length_field_len)
35 * + fcb_len_in_flash(fcb, sizeof(struct fcb_disk_area))
36 */
37 len = MIN(FCB_MAX_LEN
38 + fcb_len_in_flash(fcb, sizeof(struct fcb_disk_area))
39 + fcb_len_in_flash(fcb, FCB_CRC_SZ)
40 + fcb_len_in_flash(fcb, max_length_field_len)
41 , fcb->f_active.fe_sector->fs_size);
42
43
44 rc = fcb_append(fcb, len, &elem_loc);
45 zassert_true(rc != 0,
46 "fcb_append call should fail for too big entry");
47
48 len--;
49 rc = fcb_append(fcb, len, &elem_loc);
50 zassert_true(rc != 0,
51 "fcb_append call should fail for too big entry");
52
53 len -= fcb_len_in_flash(fcb, sizeof(struct fcb_disk_area));
54 rc = fcb_append(fcb, len, &elem_loc);
55 zassert_true(rc != 0,
56 "fcb_append call should fail for too big entry");
57
58 overhead = fcb_len_in_flash(fcb, sizeof(struct fcb_disk_area))
59 + fcb_len_in_flash(fcb, max_length_field_len)
60 + fcb_len_in_flash(fcb, FCB_CRC_SZ);
61
62 len = MIN(FCB_MAX_LEN, fcb->f_active.fe_sector->fs_size - overhead);
63 len = fcb->f_align * (len / fcb->f_align);
64
65 rc = fcb_append(fcb, len, &elem_loc);
66 zassert_true(rc == 0, "fcb_append call failure");
67
68 rc = fcb_append_finish(fcb, &elem_loc);
69 zassert_true(rc == 0, "fcb_append call failure");
70
71 rc = fcb_elem_info(fcb, &elem_loc);
72 zassert_true(rc == 0, "fcb_elem_info call failure");
73 zassert_true(elem_loc.fe_data_len == len,
74 "entry length fetched should match length of appended entry");
75 }
76
