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mmi_info: read all from bootconfig

Browse source 
After 8450 rebased to qcom FC, the bootconfig feature begins enable.
So that some androidboot.* canot be found in the cmdline,
and case can not read it.

When bootconfig enabled, read it from /proc/bootconifg file.

Change-Id: I77b8e023c1fbb85ee941663878823c26d357df2e
Signed-off-by: qianlong <qianl2@motorola.com>
Reviewed-on: https://gerrit.mot.com/2010969
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Zhenxin Xi <xizx@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
qianlong 2021-07-13 16:39:32 +08:00 • committed by qianl2
commit 1f1f1b568d
2 changed files with 95 additions and 85 deletions
Download patch file Download diff file Expand all files Collapse all files

84
drivers/mmi_info/mmi_boot_info.c
View file

@ -70,100 +70,16 @@
static char bootreason[BOOTREASON_MAX_LEN];
static char bootmode[BOOTMODE_MAX_LEN];
#ifdef CONFIG_BOOT_CONFIG
#include <linux/bootconfig.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#define BOOTCONFIG_FULLPATH "/proc/bootconfig"
static char bootconfig_tmp[256];
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
static inline ssize_t kernel_read_stub(struct file *file, void *addr, size_t count)
{
loff_t pos = 0;
return kernel_read(file, addr, count, &pos);
}
#else
static inline ssize_t kernel_read_stub(struct file *file, void *addr, size_t count)
{
return kernel_read(file, 0, addr, count);
}
#endif
static int mmi_read_bootconfig(const char *bootconfig_key, char **bootconfig_val)
{
struct file *filep = NULL;
char *xbc_buf = NULL;
int bytes = 0;
char *start_bootdevice = NULL;
int rc = 0;
filep = filp_open(BOOTCONFIG_FULLPATH, O_RDONLY, 0600);
if (IS_ERR_OR_NULL(filep)) {
rc = PTR_ERR(filep);
pr_err("opening (%s) errno=%d\n", BOOTCONFIG_FULLPATH, rc);
return rc;
}
xbc_buf = kzalloc(XBC_DATA_MAX, GFP_KERNEL);
if (!xbc_buf) {
pr_err("alloc len %d memory fail\n", XBC_DATA_MAX);
filp_close(filep, NULL);
return -ENOMEM;
}
bytes = kernel_read_stub(filep, (void *) xbc_buf, XBC_DATA_MAX);
pr_debug("read bootconfig bytes %d\n", bytes);
if (bytes <= 0) {
pr_err("fail read bytes %d\n", bytes);
kfree(xbc_buf);
filp_close(filep, NULL);
return -EIO;
}
start_bootdevice = strstr(xbc_buf, bootconfig_key);
if (start_bootdevice) {
char *p = start_bootdevice + strlen(bootconfig_key);
int i = 0;
memset(bootconfig_tmp, 0, sizeof(bootconfig_tmp));
while (p && *p && (*p != '\n') && (*p != '"')
&& (i < sizeof(bootconfig_tmp))) {
bootconfig_tmp[i] = *p;
i++;
p++;
}
*bootconfig_val = bootconfig_tmp;
pr_info("bootconfig key %s%s\"\n", bootconfig_key, *bootconfig_val);
} else {
pr_err("cannot find key %s\n", bootconfig_key);
rc = -ENOENT;
}
kfree(xbc_buf);
filp_close(filep, NULL);
return rc;
}
#endif
static void mmi_bootarg_setup(void)
{
char *s;
#ifndef CONFIG_BOOT_CONFIG
if (mmi_get_bootarg("androidboot.bootreason=", &s) == 0)
strlcpy(bootreason, s, BOOTREASON_MAX_LEN);
if (mmi_get_bootarg("androidboot.mode=", &s) == 0)
strlcpy(bootmode, s, BOOTMODE_MAX_LEN);
#else
if (mmi_read_bootconfig("androidboot.bootreason = \"", &s) == 0)
strlcpy(bootreason, s, BOOTREASON_MAX_LEN);
if (mmi_read_bootconfig("androidboot.mode = \"", &s) == 0)
strlcpy(bootmode, s, BOOTMODE_MAX_LEN);
#endif
}
/*

96
drivers/mmi_info/mmi_info_main.c
View file

@ -93,7 +93,87 @@ bool mmi_device_is_available(struct device_node *np)
}
EXPORT_SYMBOL(mmi_device_is_available);
int mmi_get_bootarg(char *key, char **value)
#ifdef CONFIG_BOOT_CONFIG
#include <linux/bootconfig.h>
#include <linux/slab.h>
#include <linux/version.h>
//#include <linux/vmalloc.h>
#define BOOTCONFIG_FULLPATH "/proc/bootconfig"
static char bootconfig_tmp[256];
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
static inline ssize_t kernel_read_stub(struct file *file, void *addr, size_t count)
{
loff_t pos = 0;
return kernel_read(file, addr, count, &pos);
}
#else
static inline ssize_t kernel_read_stub(struct file *file, void *addr, size_t count)
{
return kernel_read(file, 0, addr, count);
}
#endif
static int mmi_get_bootarg_bootconfig(const char *bootconfig_key, char **bootconfig_val)
{
struct file *filep = NULL;
char *xbc_buf = NULL;
int bytes = 0;
char *start_bootdevice = NULL;
int rc = 0;
filep = filp_open(BOOTCONFIG_FULLPATH, O_RDONLY, 0600);
if (IS_ERR_OR_NULL(filep)) {
rc = PTR_ERR(filep);
pr_err("opening (%s) errno=%d\n", BOOTCONFIG_FULLPATH, rc);
return rc;
}
xbc_buf = kzalloc(XBC_DATA_MAX, GFP_KERNEL);
if (!xbc_buf) {
pr_err("alloc len %d memory fail\n", XBC_DATA_MAX);
filp_close(filep, NULL);
return -ENOMEM;
}
bytes = kernel_read_stub(filep, (void *) xbc_buf, XBC_DATA_MAX);
pr_debug("read bootconfig bytes %d\n", bytes);
if (bytes <= 0) {
pr_err("fail read bytes %d\n", bytes);
kfree(xbc_buf);
filp_close(filep, NULL);
return -EIO;
}
start_bootdevice = strstr(xbc_buf, bootconfig_key);
if (start_bootdevice) {
char *p = start_bootdevice + strlen(bootconfig_key);
int i = 0;
memset(bootconfig_tmp, 0, sizeof(bootconfig_tmp));
while (p && *p && (*p != '\n') && (*p != '"')
&& (i < sizeof(bootconfig_tmp))) {
bootconfig_tmp[i] = *p;
i++;
p++;
}
*bootconfig_val = bootconfig_tmp;
pr_info("bootconfig key %s%s\"\n", bootconfig_key, *bootconfig_val);
} else {
pr_err("cannot find key %s\n", bootconfig_key);
rc = -ENOENT;
}
kfree(xbc_buf);
filp_close(filep, NULL);
return rc;
}
#endif
static int mmi_get_bootarg_cmdline(char *key, char **value)
{
const char *bootargs_tmp = NULL;
char *idx = NULL;
@ -136,6 +216,20 @@ err:
return err;
}
int mmi_get_bootarg(char *key, char **value)
{
#ifdef CONFIG_BOOT_CONFIG
char *tmp_buf = " = \"";
char new_key[256];
memset(new_key, 0x0, 256);
memcpy(new_key, key, strlen(key) - 1);
strcat(new_key, tmp_buf);
return mmi_get_bootarg_bootconfig(new_key, value);
#else
return mmi_get_bootarg_cmdline(key, value);
#endif
}
static void mmi_of_populate_setup(void)
{
const char *temp;