1 /*
2 * Copyright (c) 2023-2023 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "fs/fs.h"
32 #include "proc_fs.h"
33 #include "proc_file.h"
34 #include "errno.h"
35 #include "sys/mount.h"
36
37 extern struct fsmap_t g_fsmap[];
38 extern struct fsmap_t g_fsmap_end;
39
FsFileSysProcRead(struct SeqBuf *seqBuf, void *buf)40 static int FsFileSysProcRead(struct SeqBuf *seqBuf, void *buf)
41 {
42 (void)buf;
43
44 struct fsmap_t *m = NULL;
45 for (m = &g_fsmap[0]; m != &g_fsmap_end; ++m) {
46 if (m->fs_filesystemtype) {
47 if (m->is_bdfs == true) {
48 (void)LosBufPrintf(seqBuf, "\n %s\n", m->fs_filesystemtype);
49 } else {
50 (void)LosBufPrintf(seqBuf, "%s %s\n", "nodev", m->fs_filesystemtype);
51 }
52 }
53 }
54 return 0;
55 }
56
57 static const struct ProcFileOperations FILESYS_PROC_FOPS = {
58 .read = FsFileSysProcRead,
59 };
60
ProcFileSysInit(void)61 void ProcFileSysInit(void)
62 {
63 struct ProcDirEntry *pde = CreateProcEntry("filesystems", 0, NULL);
64 if (pde == NULL) {
65 PRINT_ERR("creat /proc/filesystems error!\n");
66 return;
67 }
68 pde->procFileOps = &FILESYS_PROC_FOPS;
69 }
70