kernel_liteos_a/kernel/common/los_rootfs.c

562 lines
18 KiB
C

/*
* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020-2021 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"
#if defined(LOSCFG_STORAGE_SPINOR) || defined(LOSCFG_STORAGE_SPINAND)
#include "mtd_partition.h"
#endif
#ifdef LOSCFG_DRIVERS_MMC
#include "disk.h"
#endif
#include "sys/mount.h"
#ifdef LOSCFG_PLATFORM_ROOTFS
#include "los_rootfs.h"
#endif
#include "mtd_list.h"
#include "fs/path_cache.h"
#ifdef LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7
#include "mtd_partition.h"
#include "cfiflash.h"
#define DEV_STORAGE_PATH "/dev/cfiflash1"
#define SECOND_MTD_PART_NUM 1
#endif
#ifdef LOSCFG_STORAGE_SPINOR
#define DEV_STORAGE_PATH "/dev/spinorblk2"
#define SECOND_MTD_PART_NUM 2
#define STORAGE_SIZE 0x80000
#endif
#ifdef LOSCFG_STORAGE_SPINAND
#define DEV_STORAGE_PATH "/dev/nandblk2"
#define SECOND_MTD_PART_NUM 2
#define STORAGE_SIZE 0xa00000
#endif
#ifdef LOSCFG_STORAGE_EMMC
#include "ff.h"
#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 0777
#define DEFAULT_STORAGE_MOUNT_DIR_MODE 0755
#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_STORAGE_EMMC
struct disk_divide_info *StorageBlockGetEmmc(void);
struct block_operations *StorageBlockGetMmcOps(void);
char *StorageBlockGetEmmcNodeName(void *block);
STATIC const CHAR *AddEmmcRootfsPart(INT32 rootAddr, INT32 rootSize)
{
INT32 ret;
void *block = ((struct drv_data *)g_emmcDisk->dev->data)->priv;
const char *node_name = StorageBlockGetEmmcNodeName(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 = StorageBlockGetEmmc();
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, StorageBlockGetMmcOps(), 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;
#if defined(LOSCFG_STORAGE_SPINOR) || defined(LOSCFG_STORAGE_SPINAND)
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/spinand 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/spinand 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_STORAGE_EMMC
if (strcmp(rootType, "emmc") == 0) {
rootDev = AddEmmcRootfsPart(rootAddr, rootSize);
} else
#endif
#ifdef LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7
if (strcmp(rootType, FLASH_TYPE) == 0) {
INT32 ret;
if (rootAddr != CFIFLASH_ROOT_ADDR) {
PRINT_ERR("Error rootAddr, must be %#0x!\n", CFIFLASH_ROOT_ADDR);
return NULL;
}
ret = add_mtd_partition(FLASH_TYPE, rootAddr, rootSize, 0);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add %s root partition!\n", FLASH_TYPE);
} else {
rootDev = "/dev/cfiflash0";
ret = add_mtd_partition(FLASH_TYPE, (rootAddr + rootSize),
CFIFLASH_CAPACITY - rootAddr - rootSize, SECOND_MTD_PART_NUM);
if (ret != LOS_OK) {
PRINT_ERR("Failed to add %s storage partition!\n", FLASH_TYPE);
}
}
} else
#endif
{
PRINT_ERR("Failed to find root dev type: %s\n", rootType);
}
return rootDev;
}
#ifndef LOSCFG_SECURITY_BOOT
STATIC INT32 GetArgs(CHAR **args)
{
#ifdef LOSCFG_BOOTENV_RAM
*args = OsGetArgsAddr();
return LOS_OK;
#else
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_STORAGE_EMMC
g_emmcDisk = GetMmcDisk(EMMC);
if (g_emmcDisk == NULL) {
PRINT_ERR("Get EMMC disk failed!\n");
goto ERROUT;
}
/* param4 is TRUE for not reading large contiguous data */
ret = los_disk_read(g_emmcDisk->disk_id, cmdLine, COMMAND_LINE_ADDR / EMMC_SEC_SIZE,
COMMAND_LINE_SIZE / EMMC_SEC_SIZE, TRUE);
if (ret != 0) {
PRINT_ERR("Read EMMC command line failed!\n");
goto ERROUT;
}
g_alignSize = EMMC_SEC_SIZE;
#endif
#if defined(LOSCFG_STORAGE_SPINOR) || defined(LOSCFG_STORAGE_SPINAND)
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
struct MtdDev *mtd = GetCfiMtdDev();
if (mtd == NULL) {
PRINT_ERR("Get CFI mtd failed!\n");
goto ERROUT;
}
g_alignSize = mtd->eraseSize;
ret = mtd->read(mtd, CFIFLASH_BOOTARGS_ADDR, COMMAND_LINE_SIZE, cmdLine);
if (ret != COMMAND_LINE_SIZE) {
PRINT_ERR("Read CFI command line failed!\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;
#endif
}
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 *p = NULL;
if (GetArgs(&args) != LOS_OK) {
PRINT_ERR("Cannot get bootargs!\n");
return LOS_NOK;
}
#ifndef LOSCFG_BOOTENV_RAM
CHAR *argsBak = NULL;
argsBak = args;
#endif
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)) {
#ifndef LOSCFG_BOOTENV_RAM
free(argsBak);
#endif
return LOS_OK;
}
ERROUT:
PRINT_ERR("Invalid rootfs information!\n");
if (*rootType != NULL) {
free(*rootType);
*rootType = NULL;
}
if (*fsType != NULL) {
free(*fsType);
*fsType = NULL;
}
#ifndef LOSCFG_BOOTENV_RAM
free(argsBak);
#endif
return LOS_NOK;
}
#endif
#ifdef LOSCFG_STORAGE_EMMC
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()) != EEXIST)) {
PRINT_ERR("Failed to mkdir /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 == ENOTSUP) {
#ifdef LOSCFG_FS_FAT
ret = format(emmcUserdataDev, 0, FM_FAT32);
if (ret != LOS_OK) {
PRINT_ERR("Failed to format %s\n", emmcUserdataDev);
return;
}
#endif
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;
}
#ifdef LOSCFG_STORAGE_EMMC
ret = mkdir("/storage", VFAT_STORAGE_MOUNT_DIR_MODE);
if ((ret != LOS_OK) && ((err = get_errno()) != EEXIST)) {
PRINT_ERR("Failed to mkdir /storage, errno %d: %s\n", err, strerror(err));
return ret;
} 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,rootDev %s, errno %d: %s\n", rootDev, err, strerror(err));
return ret;
}
#if defined(LOSCFG_STORAGE_SPINOR) || defined(LOSCFG_STORAGE_SPINAND) || defined(LOSCFG_PLATFORM_QEMU_ARM_VIRT_CA7)
ret = mkdir("/storage", DEFAULT_STORAGE_MOUNT_DIR_MODE);
if ((ret != LOS_OK) && ((err = get_errno()) != EEXIST)) {
PRINT_ERR("Failed to mkdir /storage, errno %d: %s\n", err, strerror(err));
return ret;
} 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;
}