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openharmony_kernel_liteos_a/kernel/common/los_rootfs.c
Zbigniew Bodek cef02d9340 Add stub for fetching bootargs for Qemu ARM virt 
Currently unused but when rootfs is enabled
we should get this error and quickly narrow down
where to add proper bootargs handling.

Signed-off-by: Zbigniew Bodek <zbigniew.bodek@huawei.com>
Change-Id: Ie8d96fc3b6ad7cc33abe67530ca8ff9526b46855
2020-11-17 23:07:01 +08:00

516 lines
16 KiB
C
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/*
* Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "los_base.h"
#include "los_typedef.h"
#include "string.h"
#ifdef LOSCFG_PLATFORM_HI3518EV300
#include "mtd_partition.h"
#endif
#ifdef LOSCFG_DRIVERS_MMC
#include "mmc/block.h"
#include "disk.h"
#include "ff.h"
#endif
#include "sys/mount.h"
#include "inode/inode.h"
#ifdef LOSCFG_PLATFORM_ROOTFS
#include "los_rootfs.h"
#endif
#include "mtd_list.h"
#ifdef LOSCFG_PLATFORM_HI3518EV300
#define DEV_STORAGE_PATH "/dev/spinorblk2"
#define SECOND_MTD_PART_NUM 2
#define STORAGE_SIZE 0x100000
#endif
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
#ifdef LOSCFG_PLATFORM_HI3516DV300
#define STORAGE_SIZE 0x3200000
STATIC los_disk *g_emmcDisk = NULL;
#endif
#ifndef LOSCFG_SECURITY_BOOT
STATIC INT32 g_alignSize = 0;
#endif
#define VFAT_STORAGE_MOUNT_DIR_MODE 777
#define DEFAULT_STORAGE_MOUNT_DIR_MODE 755
#ifdef LOSCFG_DRIVERS_MMC
los_disk *GetMmcDisk(UINT8 type)
{
const CHAR *mmcDevHead = "/dev/mmcblk";
for (INT32 diskId = 0; diskId < SYS_MAX_DISK; diskId++) {
los_disk *disk = get_disk(diskId);
if (disk == NULL) {
continue;
} else if (disk->disk_name == NULL) {
continue;
} else if (strncmp(disk->disk_name, mmcDevHead, strlen(mmcDevHead))) {
continue;
} else {
if (disk->type == type) {
return disk;
}
}
}
PRINT_ERR("Cannot find the mmc disk!\n");
return NULL;
}
#endif
#ifdef LOSCFG_PLATFORM_HI3516DV300
STATIC const CHAR *AddEmmcRootfsPart(INT32 rootAddr, INT32 rootSize)
{
INT32 ret;
struct mmc_block *block = g_emmcDisk->dev->i_private;
const char *node_name = mmc_block_get_node_name(block);
if (los_disk_deinit(g_emmcDisk->disk_id) != ENOERR) {
PRINT_ERR("Failed to deinit emmc disk!\n");
return NULL;
}
struct disk_divide_info *emmc = get_emmc();
ret = add_mmc_partition(emmc, rootAddr / EMMC_SEC_SIZE, rootSize / EMMC_SEC_SIZE);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add mmc root partition!\n");
return NULL;
} else {
UINT64 storageStartCnt = (rootAddr + rootSize) / EMMC_SEC_SIZE;
UINT64 storageSizeCnt = STORAGE_SIZE / EMMC_SEC_SIZE;
UINT64 userdataStartCnt = storageStartCnt + storageSizeCnt;
UINT64 userdataSizeCnt = g_emmcDisk->sector_count - userdataStartCnt;
ret = add_mmc_partition(emmc, storageStartCnt, storageSizeCnt);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add mmc storage partition!\n");
}
ret = add_mmc_partition(emmc, userdataStartCnt, userdataSizeCnt);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add mmc userdata partition!\n");
}
LOS_Msleep(10); /* waiting for device identification */
INT32 diskId = los_alloc_diskid_byname(node_name);
if (diskId < 0) {
PRINT_ERR("Failed to alloc disk %s!\n", node_name);
return NULL;
}
if (los_disk_init(node_name, mmc_block_get_bops(block), (void *)block, diskId, emmc) != ENOERR) {
PRINT_ERR("Failed to init emmc disk!\n");
return NULL;
}
return node_name;
}
}
#endif
STATIC const CHAR *GetDevName(const CHAR *rootType, INT32 rootAddr, INT32 rootSize)
{
const CHAR *rootDev = NULL;
#ifdef LOSCFG_PLATFORM_HI3518EV300
INT32 ret;
if (strcmp(rootType, "flash") == 0) {
ret = add_mtd_partition(FLASH_TYPE, rootAddr, rootSize, 0);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add spinor root partition!\n");
} else {
rootDev = FLASH_DEV_NAME;
ret = add_mtd_partition(FLASH_TYPE, (rootAddr + rootSize), STORAGE_SIZE, SECOND_MTD_PART_NUM);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add spinor storage partition!\n");
}
}
} else
#endif
#ifdef LOSCFG_DRIVERS_USB_MASS_STORAGE
if (strcmp(rootType, "usb") == 0) {
rootDev = "/dev/sda";
} else
#endif
#ifdef LOSCFG_DRIVERS_SD
if (strcmp(rootType, "sdcard") == 0) {
los_disk *sdDisk = GetMmcDisk(OTHERS);
if (sdDisk == NULL) {
PRINT_ERR("Get sdcard failed!\n");
} else {
rootDev = sdDisk->disk_name;
}
} else
#endif
#ifdef LOSCFG_PLATFORM_HI3516DV300
if (strcmp(rootType, "emmc") == 0) {
rootDev = AddEmmcRootfsPart(rootAddr, rootSize);
} else
#endif
{
PRINT_ERR("Failed to find root dev type: %s\n", rootType);
}
return rootDev;
}
#ifndef LOSCFG_SECURITY_BOOT
STATIC INT32 GetArgs(CHAR **args)
{
INT32 ret;
INT32 i;
INT32 len = 0;
CHAR *cmdLine = NULL;
CHAR *tmp = NULL;
const CHAR *bootargName = "bootargs=";
cmdLine = (CHAR *)malloc(COMMAND_LINE_SIZE);
if (cmdLine == NULL) {
PRINT_ERR("Malloc cmdLine space error!\n");
return LOS_NOK;
}
#ifdef LOSCFG_PLATFORM_HI3516DV300
g_emmcDisk = GetMmcDisk(EMMC);
if (g_emmcDisk == NULL) {
PRINT_ERR("Get EMMC disk failed!\n");
goto ERROUT;
}
ret = los_disk_read(g_emmcDisk->disk_id, cmdLine, COMMAND_LINE_ADDR / EMMC_SEC_SIZE,
COMMAND_LINE_SIZE / EMMC_SEC_SIZE);
if (ret != 0) {
PRINT_ERR("Read EMMC command line failed!\n");
goto ERROUT;
}
g_alignSize = EMMC_SEC_SIZE;
#endif
#ifdef LOSCFG_PLATFORM_HI3518EV300
struct MtdDev *mtd = GetMtd(FLASH_TYPE);
if (mtd == NULL) {
PRINT_ERR("Get spinor mtd failed!\n");
goto ERROUT;
}
g_alignSize = mtd->eraseSize;
ret = mtd->read(mtd, COMMAND_LINE_ADDR, COMMAND_LINE_SIZE, cmdLine);
if (ret != COMMAND_LINE_SIZE) {
PRINT_ERR("Read spinor command line failed!\n");
goto ERROUT;
}
#endif
#ifdef LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7
/*
* TODO: Implement method of fetching bootargs for
* Qemu ARM virtual platform. If used without
* bootloader it will pass DTB by default.
*/
(void)ret;
PRINT_ERR("Fetching bootargs unimplemented.\n");
goto ERROUT;
#endif
for (i = 0; i < COMMAND_LINE_SIZE; i += len + 1) {
len = strlen(cmdLine + i);
tmp = strstr(cmdLine + i, bootargName);
if (tmp != NULL) {
*args = strdup(tmp + strlen(bootargName));
if (*args == NULL) {
goto ERROUT;
}
free(cmdLine);
return LOS_OK;
}
}
PRINT_ERR("Cannot find bootargs!\n");
ERROUT:
free(cmdLine);
return LOS_NOK;
}
STATIC INT32 MatchRootPos(CHAR *p, const CHAR *rootInfoName, INT32 *rootInfo)
{
UINT32 offset;
CHAR *value = NULL;
if (strncmp(p, rootInfoName, strlen(rootInfoName)) == 0) {
value = p + strlen(rootInfoName);
offset = strspn(value, DEC_NUMBER_STRING);
if (strcmp(p + strlen(p) - 1, "M") == 0) {
if ((offset < (strlen(value) - 1)) || (sscanf_s(value, "%d", rootInfo) <= 0)) {
goto ERROUT;
}
*rootInfo = *rootInfo * BYTES_PER_MBYTE;
} else if (strcmp(p + strlen(p) - 1, "K") == 0) {
if ((offset < (strlen(value) - 1)) || (sscanf_s(value, "%d", rootInfo) <= 0)) {
goto ERROUT;
}
*rootInfo = *rootInfo * BYTES_PER_KBYTE;
} else if (sscanf_s(value, "0x%x", rootInfo) > 0) {
value += strlen("0x");
if (strspn(value, HEX_NUMBER_STRING) < strlen(value)) {
goto ERROUT;
}
} else {
goto ERROUT;
}
}
if ((*rootInfo >= 0) && (g_alignSize != 0) && ((UINT32)(*rootInfo) & (UINT32)(g_alignSize - 1))) {
PRINT_ERR("The bootarg \"%s\" will be 0x%x aligned!\n", p, g_alignSize);
}
return LOS_OK;
ERROUT:
PRINT_ERR("Invalid bootarg \"%s\"!\n", p);
return LOS_NOK;
}
STATIC INT32 MatchRootInfo(CHAR *p, CHAR **rootType, CHAR **fsType, INT32 *rootAddr, INT32 *rootSize)
{
const CHAR *rootName = "root=";
const CHAR *fsName = "fstype=";
const CHAR *rootAddrName = "rootaddr=";
const CHAR *rootSizeName = "rootsize=";
if ((*rootType == NULL) && (strncmp(p, rootName, strlen(rootName)) == 0)) {
*rootType = strdup(p + strlen(rootName));
if (*rootType == NULL) {
return LOS_NOK;
}
return LOS_OK;
}
if ((*fsType == NULL) && (strncmp(p, fsName, strlen(fsName)) == 0)) {
*fsType = strdup(p + strlen(fsName));
if (*fsType == NULL) {
return LOS_NOK;
}
return LOS_OK;
}
if (*rootAddr < 0) {
if (MatchRootPos(p, rootAddrName, rootAddr) != LOS_OK) {
return LOS_NOK;
} else if (*rootAddr >= 0) {
return LOS_OK;
}
}
if (*rootSize < 0) {
if (MatchRootPos(p, rootSizeName, rootSize) != LOS_OK) {
return LOS_NOK;
}
}
return LOS_OK;
}
STATIC INT32 GetRootType(CHAR **rootType, CHAR **fsType, INT32 *rootAddr, INT32 *rootSize)
{
CHAR *args = NULL;
CHAR *argsBak = NULL;
CHAR *p = NULL;
if (GetArgs(&args) != LOS_OK) {
PRINT_ERR("Cannot get bootargs!\n");
return LOS_NOK;
}
argsBak = args;
p = strsep(&args, " ");
while (p != NULL) {
if (MatchRootInfo(p, rootType, fsType, rootAddr, rootSize) != LOS_OK) {
goto ERROUT;
}
p = strsep(&args, " ");
}
if ((*fsType != NULL) && (*rootType != NULL)) {
free(argsBak);
return LOS_OK;
}
ERROUT:
PRINT_ERR("Invalid rootfs information!\n");
if (*rootType != NULL) {
free(*rootType);
*rootType = NULL;
}
if (*fsType != NULL) {
free(*fsType);
*fsType = NULL;
}
free(argsBak);
return LOS_NOK;
}
#endif
#ifdef LOSCFG_PLATFORM_HI3516DV300
STATIC VOID OsMountUserdata(const CHAR *fsType)
{
INT32 ret;
INT32 err;
const CHAR *userdataDir = "/userdata";
ret = mkdir(userdataDir, VFAT_STORAGE_MOUNT_DIR_MODE);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to reserve inode /userdata, errno %d: %s\n", err, strerror(err));
return;
}
CHAR emmcUserdataDev[DISK_NAME] = {0};
if (snprintf_s(emmcUserdataDev, sizeof(emmcUserdataDev), sizeof(emmcUserdataDev) - 1,
"%s%s", g_emmcDisk->disk_name, "p2") < 0) {
PRINT_ERR("Failed to get emmc userdata dev name!\n");
return;
}
ret = mount(emmcUserdataDev, userdataDir, fsType, 0, "umask=000");
if (ret == LOS_OK) {
return;
}
err = get_errno();
if (err == ENOENT) {
ret = format(emmcUserdataDev, 0, FM_FAT32);
if (ret != LOS_OK) {
PRINT_ERR("Failed to format %s\n", emmcUserdataDev);
return;
}
ret = mount(emmcUserdataDev, userdataDir, fsType, 0, "umask=000");
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount /userdata, errno %d: %s\n", err, strerror(err));
}
} else {
PRINT_ERR("Failed to mount /userdata, errno %d: %s\n", err, strerror(err));
}
return;
}
#endif
STATIC INT32 OsMountRootfsAndUserfs(const CHAR *rootDev, const CHAR *fsType)
{
INT32 ret;
INT32 err;
if (strcmp(fsType, "vfat") == 0) {
ret = mount(rootDev, "/", fsType, MS_RDONLY, NULL);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount vfat rootfs, errno %d: %s\n", err, strerror(err));
return ret;
}
g_root_inode->i_mode |= S_IRWXU | S_IRWXG | S_IRWXO;
#ifdef LOSCFG_PLATFORM_HI3516DV300
ret = mkdir("/storage", VFAT_STORAGE_MOUNT_DIR_MODE);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to reserve inode /storage, errno %d: %s\n", err, strerror(err));
} else {
CHAR emmcStorageDev[DISK_NAME] = {0};
if (snprintf_s(emmcStorageDev, sizeof(emmcStorageDev), sizeof(emmcStorageDev) - 1,
"%s%s", g_emmcDisk->disk_name, "p1") < 0) {
PRINT_ERR("Failed to get emmc storage dev name!\n");
} else {
ret = mount(emmcStorageDev, "/storage", fsType, 0, "umask=000");
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount /storage, errno %d: %s\n", err, strerror(err));
}
}
}
OsMountUserdata(fsType);
#endif
} else {
ret = mount(rootDev, "/", fsType, MS_RDONLY, NULL);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount rootfs, errno %d: %s\n", err, strerror(err));
return ret;
}
#ifdef LOSCFG_PLATFORM_HI3518EV300
ret = mkdir("/storage", DEFAULT_STORAGE_MOUNT_DIR_MODE);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to reserve inode /storage, errno %d: %s\n", err, strerror(err));
} else {
ret = mount(DEV_STORAGE_PATH, "/storage", fsType, 0, NULL);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount /storage, errno %d: %s\n", err, strerror(err));
}
}
#endif
}
return LOS_OK;
}
INT32 OsMountRootfs(VOID)
{
INT32 ret = LOS_OK;
INT32 err;
INT32 rootAddr = -1;
INT32 rootSize = -1;
CHAR *rootType = NULL;
CHAR *fsType = NULL;
const CHAR *rootDev = NULL;
#ifdef LOSCFG_SECURITY_BOOT
rootType = strdup(ROOTFS_ROOT_TYPE);
fsType = strdup(ROOTFS_FS_TYPE);
rootAddr = ROOTFS_FLASH_ADDR;
rootSize = ROOTFS_FLASH_SIZE;
#else
ret = GetRootType(&rootType, &fsType, &rootAddr, &rootSize);
if (ret != LOS_OK) {
return ret;
}
rootAddr = (rootAddr >= 0) ? rootAddr : ROOTFS_FLASH_ADDR;
rootSize = (rootSize >= 0) ? rootSize : ROOTFS_FLASH_SIZE;
#endif
rootDev = GetDevName(rootType, rootAddr, rootSize);
if (rootDev != NULL) {
ret = OsMountRootfsAndUserfs(rootDev, fsType);
if (ret != LOS_OK) {
err = get_errno();
PRINT_ERR("Failed to mount rootfs, errno %d: %s\n", err, strerror(err));
}
}
free(rootType);
free(fsType);
return ret;
}
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