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Sysparam threadsafe and SPI access

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Original work by @ourairquality
This commit is contained in:
sheinz 2016-11-25 17:16:58 +02:00
parent 5c885c7722
commit a00b78bc0c
2 changed files with 188 additions and 187 deletions
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51
core/include/sysparam.h
View file

@ -119,7 +119,7 @@ sysparam_status_t sysparam_init(uint32_t base_addr, uint32_t top_addr);
* you reformat the area currently being used, you will also need to call
* sysparam_init() again afterward before you will be able to continue using
* it.
*/
*/
sysparam_status_t sysparam_create_area(uint32_t base_addr, uint16_t num_sectors, bool force);
/** Get the start address and size of the currently active sysparam area
@ -180,24 +180,20 @@ sysparam_status_t sysparam_compact();
*/
sysparam_status_t sysparam_get_data(const char *key, uint8_t **destptr, size_t *actual_length, bool *is_binary);
/** Get the value associated with a key (static buffers only)
/** Get the value associated with a key (static value buffer)
*
* This performs the same function as sysparam_get_data() but without
* performing any memory allocations. It can thus be used before the heap has
* been configured or in other cases where using the heap would be a problem
* (i.e. in an OOM handler, etc). It requires that the caller pass in a
* suitably sized buffer for the value to be read (if the supplied buffer is
* not large enough, the returned value will be truncated and the full
* required length will be returned in `actual_length`).
*
* NOTE: In addition to being large enough for the value, the supplied buffer
* must also be at least as large as the length of the key being requested.
* If it is not, an error will be returned.
* allocating memory for the result value. It can thus be used before the heap
* has been configured or in other cases where using the heap would be a
* problem (i.e. in an OOM handler, etc). It requires that the caller pass in
* a suitably sized buffer for the value to be read (if the supplied buffer is
* not large enough, the returned value will be truncated and the full required
* length will be returned in `actual_length`).
*
* @param[in] key Key name (zero-terminated string)
* @param[in] buffer Pointer to a buffer to hold the returned value
* @param[in] buffer_size Length of the supplied buffer in bytes
* @param[out] actual_length pointer to a location to hold the actual length
* @param[in] dest Pointer to a buffer to hold the returned value.
* @param[in] dest_size Length of the supplied buffer in bytes.
* @param[out] actual_length Pointer to a location to hold the actual length
* of the data which was associated with the key
* (may be NULL).
* @param[out] is_binary Pointer to a bool to hold whether the returned
@ -210,10 +206,10 @@ sysparam_status_t sysparam_get_data(const char *key, uint8_t **destptr, size_t *
* @retval ::SYSPARAM_ERR_CORRUPT Sysparam region has bad/corrupted data
* @retval ::SYSPARAM_ERR_IO I/O error reading/writing flash
*/
sysparam_status_t sysparam_get_data_static(const char *key, uint8_t *buffer, size_t buffer_size, size_t *actual_length, bool *is_binary);
sysparam_status_t sysparam_get_data_static(const char *key, uint8_t *dest, size_t dest_size, size_t *actual_length, bool *is_binary);
/** Get the string value associated with a key
*
*
* This routine can be used if you know that the value in a key will (or at
* least should) be a string. It will return a zero-terminated char buffer
* containing the value retrieved.
@ -240,9 +236,10 @@ sysparam_status_t sysparam_get_data_static(const char *key, uint8_t *buffer, siz
sysparam_status_t sysparam_get_string(const char *key, char **destptr);
/** Get the int32_t value associated with a key
*
*
* This routine can be used if you know that the value in a key will (or at
* least should) be an int32_t value.
* least should) be an int32_t value. This is done without allocating any
* memory.
*
* Note: If the status result is anything other than ::SYSPARAM_OK, the value
* in `result` is not changed. This means it is possible to set a default
@ -266,7 +263,8 @@ sysparam_status_t sysparam_get_int32(const char *key, int32_t *result);
/** Get the int8_t value associated with a key
*
* This routine can be used if you know that the value in a key will (or at
* least should) be a uint8_t binary value.
* least should) be a uint8_t binary value. This is done without allocating any
* memory.
*
* Note: If the status result is anything other than ::SYSPARAM_OK, the value
* in `result` is not changed. This means it is possible to set a default
@ -288,7 +286,7 @@ sysparam_status_t sysparam_get_int32(const char *key, int32_t *result);
sysparam_status_t sysparam_get_int8(const char *key, int8_t *result);
/** Get the boolean value associated with a key
*
*
* This routine can be used if you know that the value in a key will (or at
* least should) be a boolean setting. It will read the specified value as a
* text string and attempt to parse it as a boolean value.
@ -320,7 +318,7 @@ sysparam_status_t sysparam_get_bool(const char *key, bool *result);
*
* The supplied value can be any data, up to 255 bytes in length. If `value`
* is NULL or `value_len` is 0, this is treated as a request to delete any
* current entry matching `key`.
* current entry matching `key`. This is done without allocating any memory.
*
* If `binary` is true, the data will be considered binary (unprintable) data,
* and this will be annotated in the saved entry. This does not affect the
@ -368,7 +366,8 @@ sysparam_status_t sysparam_set_string(const char *key, const char *value);
/** Set a key's value as a number
*
* Write an int32_t binary value to the specified key. This does the inverse of
* the sysparam_get_int32() function.
* the sysparam_get_int32() function. This is done without allocating any
* memory.
*
* @param[in] key Key name (zero-terminated string)
* @param[in] value Value to set
@ -386,10 +385,8 @@ sysparam_status_t sysparam_set_int32(const char *key, int32_t value);
/** Set a key's value as a number
*
* Write an int8_t binary value to the specified key. This does the inverse of
* the sysparam_get_int8() function.
*
* Note that if the key already contains a value which parses to the same
* boolean (true/false) value, it is left unchanged.
* the sysparam_get_int8() function. This is done without allocating any
* memory.
*
* @param[in] key Key name (zero-terminated string)
* @param[in] value Value to set

324
core/sysparam.c
View file

@ -13,9 +13,6 @@
#include "FreeRTOS.h"
#include "semphr.h"
//TODO: make this properly threadsafe
//TODO: reduce stack usage
/* The "magic" value that indicates the start of a sysparam region in flash.
*/
#define SYSPARAM_MAGIC 0x70524f45 // "EORp" in little-endian
@ -33,11 +30,14 @@
*/
#define SCAN_BUFFER_SIZE 8 // words
/* The size of the temporary buffer used for reading back and verifying data
* written to flash. Making this larger will make the write-and-verify
* operation slightly faster, but will use more heap during writes
/* The size in words of the buffer used for reading keys when searching for a
* match, for reading payloads to check if the value has changed, and reading
* back from the flash to verify writes. Will work well if big enough for
* commonly used keys, and must be at least one word. Stack allocated so not too
* large!
*/
#define VERIFY_BUF_SIZE 64
#define BOUNCE_BUFFER_WORDS 3
#define BOUNCE_BUFFER_SIZE (BOUNCE_BUFFER_WORDS * sizeof(uint32_t))
/* Size of region/entry headers. These should not normally need tweaking (and
* will probably require some code changes if they are tweaked).
@ -76,7 +76,7 @@
/******************************* Useful Macros *******************************/
#define ROUND_TO_WORD_BOUNDARY(x) (((x) + 3) & 0xfffffffc)
#define ENTRY_SIZE(payload_len) (ENTRY_HEADER_SIZE + ROUND_TO_WORD_BOUNDARY(payload_len))
#define ENTRY_SIZE(payload_len) (ENTRY_HEADER_SIZE + payload_len)
#define max(x, y) ((x) > (y) ? (x) : (y))
#define min(x, y) ((x) < (y) ? (x) : (y))
@ -119,43 +119,45 @@ static struct {
/***************************** Internal routines *****************************/
static inline IRAM sysparam_status_t _do_write(uint32_t addr, const void *data, size_t data_size) {
CHECK_FLASH_OP(sdk_spi_flash_write(addr, (void*) data, data_size));
return SYSPARAM_OK;
}
static sysparam_status_t _write_and_verify(uint32_t addr, const void *data, size_t data_size) {
int i;
uint32_t bounce[BOUNCE_BUFFER_WORDS];
static inline IRAM sysparam_status_t _do_verify(uint32_t addr, const void *data, void *buffer, size_t len) {
CHECK_FLASH_OP(sdk_spi_flash_read(addr, buffer, len));
if (memcmp(data, buffer, len)) {
return SYSPARAM_ERR_IO;
// The flash write can not cross a flash page boundary, the source needs to
// be word align, so an initial alignment write is performed if necessary.
int align = addr & 3;
if (align) {
size_t count = min(data_size, 4 - align);
// Pad the word with ones, write a word.
bounce[0] = 0xffffffff;
memcpy(((void *)bounce) + align, data, count);
CHECK_FLASH_OP(sdk_spi_flash_write(addr & ~3, bounce, 4));
CHECK_FLASH_OP(sdk_spi_flash_read(addr & ~3, bounce, 4));
if (memcmp(((void *)bounce) + align, data, count) != 0) {
debug(1, "Flash write (@ 0x%08x) verify failed!", addr);
return SYSPARAM_ERR_IO;
}
addr += count;
data += count;
data_size -= count;
}
for (i = 0; i < data_size; i += BOUNCE_BUFFER_SIZE) {
size_t count = min(data_size - i, BOUNCE_BUFFER_SIZE);
// Pad the last word write ones, write words.
bounce[(count - 1) >> 2] = 0xffffffff;
memcpy(bounce, data + i, count);
size_t word_count = (count + 3) & ~3;
CHECK_FLASH_OP(sdk_spi_flash_write(addr + i, bounce, word_count));
CHECK_FLASH_OP(sdk_spi_flash_read(addr + i, bounce, word_count));
if (memcmp(data + i, bounce, count) != 0) {
debug(1, "Flash write (@ 0x%08x) verify failed!", addr);
return SYSPARAM_ERR_IO;
}
}
return SYSPARAM_OK;
}
/*FIXME: Eventually, this should probably be implemented down at the SPI flash library layer, where it can just compare bytes/words straight from the SPI hardware buffer instead of allocating a whole separate temp buffer, reading chunks into that, and then doing a memcmp.. */
static IRAM sysparam_status_t _write_and_verify(uint32_t addr, const void *data, size_t data_size) {
int i;
size_t count;
sysparam_status_t status = SYSPARAM_OK;
uint8_t *verify_buf = malloc(VERIFY_BUF_SIZE);
if (!verify_buf) return SYSPARAM_ERR_NOMEM;
do {
status = _do_write(addr, data, data_size);
if (status != SYSPARAM_OK) break;
for (i = 0; i < data_size; i += VERIFY_BUF_SIZE) {
count = min(data_size - i, VERIFY_BUF_SIZE);
status = _do_verify(addr + i, data + i, verify_buf, count);
if (status != SYSPARAM_OK) {
debug(1, "Flash write (@ 0x%08x) verify failed!", addr);
break;
}
}
} while (false);
free(verify_buf);
return status;
}
/** Erase the sectors of a region */
static sysparam_status_t _format_region(uint32_t addr, uint16_t num_sectors) {
uint16_t sector = addr / sdk_flashchip.sector_size;
@ -295,17 +297,46 @@ static sysparam_status_t _find_entry(struct sysparam_context *ctx, uint16_t matc
}
/** Read the payload from the current entry pointed to by `ctx` */
static inline sysparam_status_t _read_payload(struct sysparam_context *ctx, uint8_t *buffer, size_t buffer_size) {
debug(3, "read payload (%d) @ 0x%08x", min(buffer_size, ctx->entry.len), ctx->addr);
CHECK_FLASH_OP(sdk_spi_flash_read(ctx->addr + ENTRY_HEADER_SIZE, (void*) buffer, min(buffer_size, ctx->entry.len)));
int i;
uint32_t addr = ctx->addr + ENTRY_HEADER_SIZE;
size_t size = min(buffer_size, ctx->entry.len);
uint32_t bounce[BOUNCE_BUFFER_WORDS];
debug(3, "read payload (%d) @ 0x%08x", size, addr);
for (i = 0; i < size; i += BOUNCE_BUFFER_SIZE) {
size_t count = min(size - i, BOUNCE_BUFFER_SIZE);
size_t word_count = (count + 3) & ~3;
CHECK_FLASH_OP(sdk_spi_flash_read(addr + i, bounce, word_count));
memcpy(buffer + i, bounce, count);
}
return SYSPARAM_OK;
}
static inline sysparam_status_t _compare_payload(struct sysparam_context *ctx, uint8_t *value, size_t size) {
debug(3, "compare payload (%d) @ 0x%08x", size, ctx->addr);
if (ctx->entry.len != size) return SYSPARAM_NOTFOUND;
uint32_t *bounce[BOUNCE_BUFFER_WORDS];
uint32_t addr = ctx->addr + ENTRY_HEADER_SIZE;
int i;
for (i = 0; i < size; i += BOUNCE_BUFFER_SIZE) {
int len = min(size - i, BOUNCE_BUFFER_SIZE);
CHECK_FLASH_OP(sdk_spi_flash_read(addr + i, (void*)bounce, len));
if (memcmp(value + i, bounce, len)) {
// Mismatch.
return SYSPARAM_NOTFOUND;
}
}
return SYSPARAM_OK;
}
/** Find the entry corresponding to the specified key name */
static sysparam_status_t _find_key(struct sysparam_context *ctx, const char *key, uint16_t key_len, uint8_t *buffer) {
static sysparam_status_t _find_key(struct sysparam_context *ctx, const char *key, uint16_t key_len) {
sysparam_status_t status;
debug(3, "find key: %s", key ? key : "(null)");
debug(3, "find key len %d: %s", key_len, key ? key : "(null)");
while (true) {
// Find the next key entry
status = _find_entry(ctx, ENTRY_ID_ANY, false);
@ -316,12 +347,12 @@ static sysparam_status_t _find_key(struct sysparam_context *ctx, const char *key
break;
}
if (ctx->entry.len == key_len) {
status = _read_payload(ctx, buffer, key_len);
if (status < 0) return status;
if (!memcmp(key, buffer, key_len)) {
status = _compare_payload(ctx, (uint8_t *)key, key_len);
if (status == SYSPARAM_OK) {
// We have a match
break;
}
if (status != SYSPARAM_NOTFOUND) return status;
debug(3, "entry payload does not match");
} else {
debug(3, "key length (%d) does not match (%d)", ctx->entry.len, key_len);
@ -398,9 +429,7 @@ static inline sysparam_status_t _delete_entry(uint32_t addr) {
// Set the ID to zero to mark it as "deleted"
entry.idflags &= ~ENTRY_FLAG_ALIVE;
debug(3, "write entry header @ 0x%08x", addr);
CHECK_FLASH_OP(sdk_spi_flash_write(addr, (void*) &entry, ENTRY_HEADER_SIZE));
return SYSPARAM_OK;
return _write_and_verify(addr, &entry, ENTRY_HEADER_SIZE);
}
/** Compact the current region, removing all deleted/unused entries, and write
@ -655,70 +684,79 @@ sysparam_status_t sysparam_get_data(const char *key, uint8_t **destptr, size_t *
sysparam_status_t status;
size_t key_len = strlen(key);
uint8_t *buffer;
uint8_t *newbuf;
if (!_sysparam_info.cur_base) return SYSPARAM_ERR_NOINIT;
buffer = malloc(key_len + 2);
if (!buffer) return SYSPARAM_ERR_NOMEM;
do {
_init_context(&ctx);
status = _find_key(&ctx, key, key_len, buffer);
if (status != SYSPARAM_OK) break;
xSemaphoreTake(_sysparam_info.sem, portMAX_DELAY);
// Find the associated value
status = _find_value(&ctx, ctx.entry.idflags);
if (status != SYSPARAM_OK) break;
newbuf = realloc(buffer, ctx.entry.len + 1);
if (!newbuf) {
status = SYSPARAM_ERR_NOMEM;
break;
}
buffer = newbuf;
status = _read_payload(&ctx, buffer, ctx.entry.len);
if (status != SYSPARAM_OK) break;
// Zero-terminate the result, just in case (doesn't hurt anything for
// non-string data, and can avoid nasty mistakes if the caller wants to
// interpret the result as a string).
buffer[ctx.entry.len] = 0;
*destptr = buffer;
if (actual_length) *actual_length = ctx.entry.len;
if (is_binary) *is_binary = (bool)(ctx.entry.idflags & ENTRY_FLAG_BINARY);
return SYSPARAM_OK;
} while (false);
free(buffer);
if (actual_length) *actual_length = 0;
if (!_sysparam_info.cur_base) {
status = SYSPARAM_ERR_NOINIT;
goto done;
}
_init_context(&ctx);
status = _find_key(&ctx, key, key_len);
if (status != SYSPARAM_OK) goto done;
// Find the associated value
status = _find_value(&ctx, ctx.entry.idflags);
if (status != SYSPARAM_OK) goto done;
buffer = malloc(ctx.entry.len + 1);
if (!buffer) {
status = SYSPARAM_ERR_NOMEM;
goto done;
}
status = _read_payload(&ctx, buffer, ctx.entry.len);
if (status != SYSPARAM_OK) {
free(buffer);
goto done;
}
// Zero-terminate the result, just in case (doesn't hurt anything for
// non-string data, and can avoid nasty mistakes if the caller wants to
// interpret the result as a string).
buffer[ctx.entry.len] = 0;
*destptr = buffer;
if (actual_length) *actual_length = ctx.entry.len;
if (is_binary) *is_binary = (bool)(ctx.entry.idflags & ENTRY_FLAG_BINARY);
status = SYSPARAM_OK;
done:
xSemaphoreGive(_sysparam_info.sem);
return status;
}
sysparam_status_t sysparam_get_data_static(const char *key, uint8_t *buffer, size_t buffer_size, size_t *actual_length, bool *is_binary) {
sysparam_status_t sysparam_get_data_static(const char *key, uint8_t *dest, size_t dest_size, size_t *actual_length, bool *is_binary) {
struct sysparam_context ctx;
sysparam_status_t status = SYSPARAM_OK;
size_t key_len = strlen(key);
if (!_sysparam_info.cur_base) return SYSPARAM_ERR_NOINIT;
// Supplied buffer must be at least as large as the key, or 2 bytes,
// whichever is larger.
if (buffer_size < max(key_len, 2)) return SYSPARAM_ERR_NOMEM;
xSemaphoreTake(_sysparam_info.sem, portMAX_DELAY);
if (actual_length) *actual_length = 0;
if (!_sysparam_info.cur_base) {
status = SYSPARAM_ERR_NOINIT;
goto done;
}
_init_context(&ctx);
status = _find_key(&ctx, key, key_len, buffer);
if (status != SYSPARAM_OK) return status;
status = _find_key(&ctx, key, key_len);
if (status != SYSPARAM_OK) goto done;
status = _find_value(&ctx, ctx.entry.idflags);
if (status != SYSPARAM_OK) return status;
status = _read_payload(&ctx, buffer, buffer_size);
if (status != SYSPARAM_OK) return status;
if (status != SYSPARAM_OK) goto done;
status = _read_payload(&ctx, dest, dest_size);
if (status != SYSPARAM_OK) goto done;
if (actual_length) *actual_length = ctx.entry.len;
if (is_binary) *is_binary = (bool)(ctx.entry.idflags & ENTRY_FLAG_BINARY);
return SYSPARAM_OK;
done:
xSemaphoreGive(_sysparam_info.sem);
return status;
}
sysparam_status_t sysparam_get_string(const char *key, char **destptr) {
@ -741,33 +779,32 @@ sysparam_status_t sysparam_get_string(const char *key, char **destptr) {
}
sysparam_status_t sysparam_get_int32(const char *key, int32_t *result) {
char *buffer;
char *endptr;
int32_t value;
size_t actual_length;
bool is_binary;
sysparam_status_t status;
status = sysparam_get_string(key, &buffer);
status = sysparam_get_data_static(key, (uint8_t *)&value, sizeof(int32_t),
&actual_length, &is_binary);
if (status != SYSPARAM_OK) return status;
value = strtol(buffer, &endptr, 0);
if (*endptr) {
// There was extra crap at the end of the string.
free(buffer);
if (!is_binary || actual_length != sizeof(int32_t))
return SYSPARAM_PARSEFAILED;
}
*result = value;
free(buffer);
return SYSPARAM_OK;
return status;
}
sysparam_status_t sysparam_get_int8(const char *key, int8_t *result) {
int32_t value;
int8_t value;
size_t actual_length;
bool is_binary;
sysparam_status_t status;
status = sysparam_get_int32(key, &value);
if (status == SYSPARAM_OK) {
*result = value;
}
status = sysparam_get_data_static(key, (uint8_t *)&value, sizeof(int8_t),
&actual_length, &is_binary);
if (status != SYSPARAM_OK) return status;
if (!is_binary || actual_length != sizeof(int8_t))
return SYSPARAM_PARSEFAILED;
*result = value;
return status;
}
@ -806,48 +843,30 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
struct sysparam_context write_ctx;
sysparam_status_t status = SYSPARAM_OK;
uint16_t key_len = strlen(key);
uint8_t *buffer;
uint8_t *newbuf;
size_t free_space;
size_t needed_space;
bool free_value = false;
int key_id = -1;
uint32_t old_value_addr = 0;
uint16_t binary_flag;
if (!_sysparam_info.cur_base) return SYSPARAM_ERR_NOINIT;
if (!key_len) return SYSPARAM_ERR_BADVALUE;
if (key_len > MAX_KEY_LEN) return SYSPARAM_ERR_BADVALUE;
if (value_len > MAX_VALUE_LEN) return SYSPARAM_ERR_BADVALUE;
xSemaphoreTake(_sysparam_info.sem, portMAX_DELAY);
if (!value) value_len = 0;
debug(1, "updating value for '%s' (%d bytes)", key, value_len);
if (value_len && ((intptr_t)value & 0x3)) {
// The passed value isn't word-aligned. This will be a problem later
// when calling `sdk_spi_flash_write`, so make a word-aligned copy.
buffer = malloc(value_len);
if (!buffer) {
status = SYSPARAM_ERR_NOMEM;
goto done;
}
memcpy(buffer, value, value_len);
value = buffer;
free_value = true;
}
// Create a working buffer for `_find_key` to use.
buffer = malloc(key_len);
if (!buffer) {
if (free_value) free((void *)value);
status = SYSPARAM_ERR_NOMEM;
xSemaphoreTake(_sysparam_info.sem, portMAX_DELAY);
if (!_sysparam_info.cur_base) {
status = SYSPARAM_ERR_NOINIT;
goto done;
}
do {
_init_context(&ctx);
status = _find_key(&ctx, key, key_len, buffer);
status = _find_key(&ctx, key, key_len);
if (status == SYSPARAM_OK) {
// Key already exists, see if there's a current value.
key_id = ctx.entry.idflags & ENTRY_MASK_ID;
@ -862,24 +881,17 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
if (value_len) {
if (old_value_addr) {
if ((ctx.entry.idflags & ENTRY_FLAG_BINARY) == binary_flag && ctx.entry.len == value_len) {
if ((ctx.entry.idflags & ENTRY_FLAG_BINARY) == binary_flag &&
ctx.entry.len == value_len) {
// Are we trying to write the same value that's already there?
if (value_len > key_len) {
newbuf = realloc(buffer, value_len);
if (!newbuf) {
status = SYSPARAM_ERR_NOMEM;
break;
}
buffer = newbuf;
}
status = _read_payload(&ctx, buffer, value_len);
if (status < 0) break;
if (!memcmp(buffer, value, value_len)) {
status = _compare_payload(&ctx, (uint8_t *)value, value_len);
if (status == SYSPARAM_OK) {
// Yup, it's a match! No need to do anything further,
// just leave the current value as-is.
status = SYSPARAM_OK;
break;
}
if (status != SYSPARAM_NOTFOUND) goto done;
}
// Since we will be deleting the old value (if any) make sure
@ -981,9 +993,6 @@ sysparam_status_t sysparam_set_data(const char *key, const uint8_t *value, size_
debug(1, "New addr is 0x%08x (%d bytes remaining)", _sysparam_info.end_addr, _sysparam_info.cur_base + _sysparam_info.region_size - _sysparam_info.end_addr);
} while (false);
if (free_value) free((void *)value);
free(buffer);
done:
xSemaphoreGive(_sysparam_info.sem);
@ -995,11 +1004,7 @@ sysparam_status_t sysparam_set_string(const char *key, const char *value) {
}
sysparam_status_t sysparam_set_int32(const char *key, int32_t value) {
uint8_t buffer[12];
int len;
len = snprintf((char *)buffer, 12, "%d", value);
return sysparam_set_data(key, buffer, len, false);
return sysparam_set_data(key, (const uint8_t *)&value, sizeof(value), true);
}
sysparam_status_t sysparam_set_int8(const char *key, int8_t value) {
@ -1043,7 +1048,6 @@ sysparam_status_t sysparam_iter_start(sysparam_iter_t *iter) {
}
sysparam_status_t sysparam_iter_next(sysparam_iter_t *iter) {
uint8_t buffer[2];
sysparam_status_t status;
size_t required_len;
struct sysparam_context *ctx = iter->ctx;
@ -1052,7 +1056,7 @@ sysparam_status_t sysparam_iter_next(sysparam_iter_t *iter) {
char *newbuf;
while (true) {
status = _find_key(ctx, NULL, 0, buffer);
status = _find_key(ctx, NULL, 0);
if (status != SYSPARAM_OK) return status;
memcpy(&value_ctx, ctx, sizeof(value_ctx));
@ -1060,7 +1064,7 @@ sysparam_status_t sysparam_iter_next(sysparam_iter_t *iter) {
if (status < 0) return status;
if (status == SYSPARAM_NOTFOUND) continue;
key_space = ROUND_TO_WORD_BOUNDARY(ctx->entry.len + 1);
key_space = ctx->entry.len + 1;
required_len = key_space + value_ctx.entry.len + 1;
if (required_len > iter->bufsize) {
newbuf = realloc(iter->key, required_len);