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 "internal.h"
32 #include "proc_fs.h"
33 #include "vnode.h"
34 #include "los_memory.h"
35 #include "los_vm_filemap.h"
36 #include "los_memory_pri.h"
37
SysMemInfoFill(struct SeqBuf * seqBuf,void * arg)38 static int SysMemInfoFill(struct SeqBuf *seqBuf, void *arg)
39 {
40 (void)arg;
41 LOS_MEM_POOL_STATUS mem = {0};
42 if (LOS_MemInfoGet(m_aucSysMem0, &mem) == LOS_NOK) {
43 return -EBADF;
44 }
45 (void)LosBufPrintf(seqBuf, "\nUsedSize: %u byte\n", mem.totalUsedSize);
46 (void)LosBufPrintf(seqBuf, "FreeSize: %u byte\n", mem.totalFreeSize);
47 (void)LosBufPrintf(seqBuf, "MaxFreeNodeSize: %u byte\n", mem.maxFreeNodeSize);
48 (void)LosBufPrintf(seqBuf, "UsedNodeNum: %u\n", mem.usedNodeNum);
49 (void)LosBufPrintf(seqBuf, "FreeNodeNum: %u\n", mem.freeNodeNum);
50 #ifdef LOSCFG_MEM_WATERLINE
51 (void)LosBufPrintf(seqBuf, "UsageWaterLine: %u byte\n", mem.usageWaterLine);
52 #endif
53 return 0;
54 }
55
56 static const struct ProcFileOperations SYS_MEMINFO_PROC_FOPS = {
57 .read = SysMemInfoFill,
58 };
59
ProcSysMemInfoInit(void)60 void ProcSysMemInfoInit(void)
61 {
62 struct ProcDirEntry *pde = CreateProcEntry("meminfo", 0, NULL);
63 if (pde == NULL) {
64 PRINT_ERR("create mem_info error!\n");
65 return;
66 }
67
68 pde->procFileOps = &SYS_MEMINFO_PROC_FOPS;
69 }
70