The IMD code should be readonly and never modify any pointers. Make
all pointers const so that const pointers can be passed in to IMD.
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
common/bbu.c | 4 ++--
common/imd.c | 27 ++++++++++++++-------------
include/bbu.h | 2 +-
include/image-metadata.h | 21 +++++++++++----------
4 files changed, 28 insertions(+), 26 deletions(-)
diff --git a/common/bbu.c b/common/bbu.c
index 3b372263b1..11e44f4a7d 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -159,7 +159,7 @@ static int bbu_check_of_compat(struct bbu_data *data)
struct device_node *root_node;
const char *machine, *str;
int ret;
- struct imd_header *of_compat;
+ const struct imd_header *of_compat;
if (!IS_ENABLED(CONFIG_OFDEVICE) || !IS_ENABLED(CONFIG_IMD))
return 0;
@@ -191,7 +191,7 @@ static int bbu_check_of_compat(struct bbu_data *data)
static int bbu_check_metadata(struct bbu_data *data)
{
- struct imd_header *imd;
+ const struct imd_header *imd;
int ret;
char *str;
diff --git a/common/imd.c b/common/imd.c
index a8a10fc9bb..05e118e773 100644
--- a/common/imd.c
+++ b/common/imd.c
@@ -35,7 +35,7 @@ int imd_command_setenv(const char *variable_name, const char
*value)
* imd_next - return a pointer to the next metadata field.
* @imd The current metadata field
*/
-struct imd_header *imd_next(struct imd_header *imd)
+const struct imd_header *imd_next(const struct imd_header *imd)
{
int length;
@@ -43,10 +43,11 @@ struct imd_header *imd_next(struct imd_header *imd)
length = ALIGN(length, 4);
length += 8;
- return (void *)imd + length;
+ return (const void *)imd + length;
}
-struct imd_header *imd_find_type(struct imd_header *imd, uint32_t type)
+const struct imd_header *imd_find_type(const struct imd_header *imd,
+ uint32_t type)
{
imd_for_each(imd, imd)
if (imd_read_type(imd) == type)
@@ -55,10 +56,10 @@ struct imd_header *imd_find_type(struct imd_header *imd,
uint32_t type)
return NULL;
}
-static int imd_next_validate(void *buf, int bufsize, int start_ofs)
+static int imd_next_validate(const void *buf, int bufsize, int start_ofs)
{
int length, size;
- struct imd_header *imd = buf + start_ofs;
+ const struct imd_header *imd = buf + start_ofs;
size = bufsize - start_ofs;
@@ -82,10 +83,10 @@ static int imd_next_validate(void *buf, int bufsize, int
start_ofs)
return length;
}
-static int imd_validate_tags(void *buf, int bufsize, int start_ofs)
+static int imd_validate_tags(const void *buf, int bufsize, int start_ofs)
{
int ret;
- struct imd_header *imd = buf + start_ofs;
+ const struct imd_header *imd = buf + start_ofs;
while (1) {
uint32_t type;
@@ -122,7 +123,7 @@ static int imd_validate_tags(void *buf, int bufsize, int
start_ofs)
*
* Return: a pointer to the image metadata or a ERR_PTR
*/
-struct imd_header *imd_get(void *buf, int size)
+const struct imd_header *imd_get(const void *buf, int size)
{
int start_ofs = 0;
int i, ret;
@@ -206,7 +207,7 @@ static uint32_t imd_name_to_type(const char *name)
*
* Return: A pointer to the string or NULL if the string is not found
*/
-const char *imd_string_data(struct imd_header *imd, int index)
+const char *imd_string_data(const struct imd_header *imd, int index)
{
int i, total = 0, l = 0;
int len = imd_read_length(imd);
@@ -233,7 +234,7 @@ const char *imd_string_data(struct imd_header *imd, int
index)
*
* Return: A pointer to the string or NULL if the string is not found
*/
-char *imd_concat_strings(struct imd_header *imd)
+char *imd_concat_strings(const struct imd_header *imd)
{
int i, len = imd_read_length(imd);
char *str;
@@ -266,9 +267,9 @@ char *imd_concat_strings(struct imd_header *imd)
*
* Return: A pointer to the value or NULL if the string is not found
*/
-const char *imd_get_param(struct imd_header *imd, const char *name)
+const char *imd_get_param(const struct imd_header *imd, const char *name)
{
- struct imd_header *cur;
+ const struct imd_header *cur;
int namelen = strlen(name);
imd_for_each(imd, cur) {
@@ -294,7 +295,7 @@ int imd_command(int argc, char *argv[])
void *buf;
size_t size;
uint32_t type = IMD_TYPE_INVALID;
- struct imd_header *imd_start, *imd;
+ const struct imd_header *imd_start, *imd;
const char *filename;
const char *variable_name = NULL;
char *str;
diff --git a/include/bbu.h b/include/bbu.h
index 54434b03e0..a3824e11cf 100644
--- a/include/bbu.h
+++ b/include/bbu.h
@@ -16,7 +16,7 @@ struct bbu_data {
const char *devicefile;
size_t len;
const char *handler_name;
- struct imd_header *imd_data;
+ const struct imd_header *imd_data;
};
struct bbu_handler {
diff --git a/include/image-metadata.h b/include/image-metadata.h
index 0ba92469a4..8739bffb92 100644
--- a/include/image-metadata.h
+++ b/include/image-metadata.h
@@ -56,35 +56,36 @@ static inline int imd_type_valid(uint32_t type)
return (type & 0xffff0000) == 0x640c0000;
}
-struct imd_header *imd_next(struct imd_header *imd);
+const struct imd_header *imd_next(const struct imd_header *imd);
#define imd_for_each(start, imd) \
for (imd = imd_next(start); imd_read_type(imd) != IMD_TYPE_END; imd =
imd_next(imd))
-static inline uint32_t imd_read_le32(void *_ptr)
+static inline uint32_t imd_read_le32(const void *_ptr)
{
- uint8_t *ptr = _ptr;
+ const uint8_t *ptr = _ptr;
return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
}
-static inline uint32_t imd_read_type(struct imd_header *imd)
+static inline uint32_t imd_read_type(const struct imd_header *imd)
{
return imd_read_le32(&imd->type);
}
-static inline uint32_t imd_read_length(struct imd_header *imd)
+static inline uint32_t imd_read_length(const struct imd_header *imd)
{
return imd_read_le32(&imd->datalength);
}
-struct imd_header *imd_find_type(struct imd_header *imd, uint32_t type);
+const struct imd_header *imd_find_type(const struct imd_header *imd,
+ uint32_t type);
-struct imd_header *imd_get(void *buf, int size);
-const char *imd_string_data(struct imd_header *imd, int index);
+const struct imd_header *imd_get(const void *buf, int size);
+const char *imd_string_data(const struct imd_header *imd, int index);
const char *imd_type_to_name(uint32_t type);
-char *imd_concat_strings(struct imd_header *imd);
-const char *imd_get_param(struct imd_header *imd, const char *name);
+char *imd_concat_strings(const struct imd_header *imd);
+const char *imd_get_param(const struct imd_header *imd, const char *name);
extern int imd_command_verbose;
int imd_command_setenv(const char *variable_name, const char *value);
--
2.15.1
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