1 /*
2 * Copyright (C) 2022 Huawei Technologies Co., Ltd.
3 * Decription: function declaration for load app operations for kernel CA.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14 #include "teek_app_load.h"
15 #include <linux/fs.h>
16 #include <linux/uaccess.h>
17 #include <linux/vmalloc.h>
18 #include "session_manager.h"
19 #include "ko_adapt.h"
20
teek_open_app_file(struct file * fp,char ** file_buf,uint32_t total_img_len)21 static int32_t teek_open_app_file(struct file *fp, char **file_buf, uint32_t total_img_len)
22 {
23 loff_t pos = 0;
24 uint32_t read_size;
25 char *file_buffer = NULL;
26
27 if (total_img_len == 0 || total_img_len > MAX_IMAGE_LEN) {
28 tloge("img len is invalied %u\n", total_img_len);
29 return TEEC_ERROR_BAD_PARAMETERS;
30 }
31
32 file_buffer = vmalloc(total_img_len);
33 if (!file_buffer) {
34 tloge("alloc TA file buffer(size=%u) failed\n", total_img_len);
35 return TEEC_ERROR_GENERIC;
36 }
37
38 read_size = (uint32_t)kernel_read(fp, file_buffer, total_img_len, &pos);
39 if (read_size != total_img_len) {
40 tloge("read ta file failed, read size/total size=%u/%u\n", read_size, total_img_len);
41 vfree(file_buffer);
42 return TEEC_ERROR_GENERIC;
43 }
44
45 *file_buf = file_buffer;
46
47 return TEEC_SUCCESS;
48 }
49
teek_read_app(const char * load_file,char ** file_buf,uint32_t * file_len)50 static int32_t teek_read_app(const char *load_file, char **file_buf, uint32_t *file_len)
51 {
52 int32_t ret;
53 struct file *fp = NULL;
54
55 fp = filp_open(load_file, O_RDONLY, 0);
56 if (!fp || IS_ERR(fp)) {
57 tloge("open file error %ld\n", PTR_ERR(fp));
58 return TEEC_ERROR_BAD_PARAMETERS;
59 }
60
61 if (!fp->f_inode) {
62 tloge("node is NULL\n");
63 filp_close(fp, 0);
64 return TEEC_ERROR_BAD_PARAMETERS;
65 }
66
67 *file_len = (uint32_t)(fp->f_inode->i_size);
68
69 ret = teek_open_app_file(fp, file_buf, *file_len);
70 if (ret != TEEC_SUCCESS)
71 tloge("do read app fail\n");
72
73 if (fp != NULL) {
74 filp_close(fp, 0);
75 fp = NULL;
76 }
77
78 return ret;
79 }
80
teek_free_app(bool load_app_flag,char ** file_buf)81 void teek_free_app(bool load_app_flag, char **file_buf)
82 {
83 if (load_app_flag && file_buf != NULL && *file_buf != NULL) {
84 vfree(*file_buf);
85 *file_buf = NULL;
86 }
87 }
88
teek_get_app(const char * ta_path,char ** file_buf,uint32_t * file_len)89 int32_t teek_get_app(const char *ta_path, char **file_buf, uint32_t *file_len)
90 {
91 int32_t ret;
92
93 /* ta path is NULL means no need to load TA */
94 if (!ta_path)
95 return TEEC_SUCCESS;
96
97 if (!file_buf || !file_len) {
98 tloge("load app params invalied\n");
99 return TEEC_ERROR_BAD_PARAMETERS;
100 }
101
102 ret = teek_read_app(ta_path, file_buf, file_len);
103 if (ret != TEEC_SUCCESS)
104 tloge("teec load app error %d\n", ret);
105
106 return ret;
107 }
108