[PATCH v2 07/14] mtdparts: use negative error codes
Alexey Romanov
avromanov at salutedevices.com
Tue Jan 9 18:32:19 CET 2024
It is bad practice to use such error codes. Error codes
must be negative.
Also, fastboot code expects that if successful, mtdparts
functions will return a value greater than 0. You can see
fastboot_nand_get_part_info() functions calls inside
getvar_get_part_info().
Signed-off-by: Alexey Romanov <avromanov at salutedevices.com>
---
cmd/mtdparts.c | 134 ++++++++++++++++++++++++-------------------------
1 file changed, 67 insertions(+), 67 deletions(-)
diff --git a/cmd/mtdparts.c b/cmd/mtdparts.c
index b31db73ebf..00c07014b2 100644
--- a/cmd/mtdparts.c
+++ b/cmd/mtdparts.c
@@ -299,7 +299,7 @@ static void current_save(void)
* @param type mtd type
* @param num mtd number
* @param mtd a pointer to an mtd_info instance (output)
- * Return: 0 if device is valid, 1 otherwise
+ * Return: 0 if device is valid, -errno otherwise
*/
static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
{
@@ -309,7 +309,7 @@ static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
*mtd = get_mtd_device_nm(mtd_dev);
if (IS_ERR(*mtd)) {
printf("Device %s not found!\n", mtd_dev);
- return 1;
+ return -ENODEV;
}
put_mtd_device(*mtd);
@@ -323,7 +323,7 @@ static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
*
* @param id of the parent device
* @param part partition to validate
- * Return: 0 if partition is valid, 1 otherwise
+ * Return: 0 if partition is valid, -errno otherwise
*/
static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
{
@@ -333,7 +333,7 @@ static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
u64 offset, size;
if (get_mtd_info(id->type, id->num, &mtd))
- return 1;
+ return -EINVAL;
part->sector_size = mtd->erasesize;
@@ -347,14 +347,14 @@ static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
printf("%s%d: partition (%s) start offset"
"alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ return -EINVAL;
}
size = part->size;
if (do_div(size, mtd->erasesize)) {
printf("%s%d: partition (%s) size alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ return -EINVAL;
}
} else {
/*
@@ -374,7 +374,7 @@ static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
printf("%s%d: partition (%s) start offset alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ return -EINVAL;
start_ok:
@@ -393,7 +393,7 @@ static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
printf("%s%d: partition (%s) size alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ return -EINVAL;
end_ok:
return 0;
@@ -410,7 +410,7 @@ static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
*
* @param id of the parent device
* @param part partition to validate
- * Return: 0 if partition is valid, 1 otherwise
+ * Return: 0 if partition is valid, -errno otherwise
*/
static int part_validate(struct mtdids *id, struct part_info *part)
{
@@ -420,18 +420,18 @@ static int part_validate(struct mtdids *id, struct part_info *part)
if (part->offset > id->size) {
printf("%s: offset %08llx beyond flash size %08llx\n",
id->mtd_id, part->offset, id->size);
- return 1;
+ return -EINVAL;
}
if ((part->offset + part->size) <= part->offset) {
printf("%s%d: partition (%s) size too big\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
- return 1;
+ return -EINVAL;
}
if (part->offset + part->size > id->size) {
printf("%s: partitioning exceeds flash size\n", id->mtd_id);
- return 1;
+ return -EINVAL;
}
/*
@@ -446,7 +446,7 @@ static int part_validate(struct mtdids *id, struct part_info *part)
*
* @param dev device to delete partition from
* @param part partition to delete
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -ernno otherwise
*/
static int part_del(struct mtd_device *dev, struct part_info *part)
{
@@ -544,7 +544,7 @@ static int part_sort_add(struct mtd_device *dev, struct part_info *part)
/* be compliant with kernel cmdline, allow only one partition at offset zero */
if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
printf("cannot add second partition at offset 0\n");
- return 1;
+ return -EINVAL;
}
if (new_pi->offset <= pi->offset) {
@@ -574,17 +574,17 @@ static int part_sort_add(struct mtd_device *dev, struct part_info *part)
*
* @param dev device to which partition is added
* @param part partition to be added
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int part_add(struct mtd_device *dev, struct part_info *part)
{
/* verify alignment and size */
if (part_validate(dev->id, part) != 0)
- return 1;
+ return -EINVAL;
/* partition is ok, add it to the list */
if (part_sort_add(dev, part) != 0)
- return 1;
+ return -EINVAL;
return 0;
}
@@ -596,7 +596,7 @@ static int part_add(struct mtd_device *dev, struct part_info *part)
* @param partdef pointer to the partition definition string i.e. <part-def>
* @param ret output pointer to next char after parse completes (output)
* @param retpart pointer to the allocated partition (output)
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
{
@@ -622,7 +622,7 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
size = memsize_parse(p, &p);
if (size < MIN_PART_SIZE) {
printf("partition size too small (%llx)\n", size);
- return 1;
+ return -EINVAL;
}
}
@@ -638,12 +638,12 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
name = ++p;
if ((p = strchr(name, ')')) == NULL) {
printf("no closing ) found in partition name\n");
- return 1;
+ return -EINVAL;
}
name_len = p - name + 1;
if ((name_len - 1) == 0) {
printf("empty partition name\n");
- return 1;
+ return -EINVAL;
}
p++;
} else {
@@ -664,7 +664,7 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
if (size == SIZE_REMAINING) {
*ret = NULL;
printf("no partitions allowed after a fill-up partition\n");
- return 1;
+ return -EINVAL;
}
*ret = ++p;
} else if ((*p == ';') || (*p == '\0')) {
@@ -672,14 +672,14 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
} else {
printf("unexpected character '%c' at the end of partition\n", *p);
*ret = NULL;
- return 1;
+ return -EINVAL;
}
/* allocate memory */
part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
if (!part) {
printf("out of memory\n");
- return 1;
+ return -ENOMEM;
}
memset(part, 0, sizeof(struct part_info) + name_len);
part->size = size;
@@ -714,14 +714,14 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
* @param type mtd type
* @param num mtd number
* @param size a pointer to the size of the mtd device (output)
- * Return: 0 if device is valid, 1 otherwise
+ * Return: 0 if device is valid, -errno otherwise
*/
static int mtd_device_validate(u8 type, u8 num, u64 *size)
{
struct mtd_info *mtd = NULL;
if (get_mtd_info(type, num, &mtd))
- return 1;
+ return -EINVAL;
*size = mtd->size;
@@ -732,7 +732,7 @@ static int mtd_device_validate(u8 type, u8 num, u64 *size)
* Delete all mtd devices from a supplied devices list, free memory allocated for
* each device and delete all device partitions.
*
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int device_delall(struct list_head *head)
{
@@ -756,7 +756,7 @@ static int device_delall(struct list_head *head)
* from device list and device memory is freed.
*
* @param dev device to be deleted
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int device_del(struct mtd_device *dev)
{
@@ -835,7 +835,7 @@ static void device_add(struct mtd_device *dev)
* @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
* @param ret output pointer to next char after parse completes (output)
* @param retdev pointer to the allocated device (output)
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
{
@@ -864,7 +864,7 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
mtd_id = p = mtd_dev;
if (!(p = strchr(mtd_id, ':'))) {
printf("no <mtd-id> identifier\n");
- return 1;
+ return -EINVAL;
}
mtd_id_len = p - mtd_id + 1;
p++;
@@ -872,7 +872,7 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
/* verify if we have a valid device specified */
if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
- return 1;
+ return -ENODEV;
}
pend = strchr(p, ';');
@@ -915,7 +915,7 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
}
if (err == 1) {
part_delall(&tmp_list);
- return 1;
+ return -EINVAL;
}
debug("\ntotal partitions: %d\n", num_parts);
@@ -932,14 +932,14 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
printf("unexpected character '%c' at the end of device\n", *p);
if (ret)
*ret = NULL;
- return 1;
+ return -EINVAL;
}
}
/* allocate memory for mtd_device structure */
if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
printf("out of memory\n");
- return 1;
+ return -ENOMEM;
}
memset(dev, 0, sizeof(struct mtd_device));
dev->id = id;
@@ -953,7 +953,7 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
list_del(entry);
if (part_sort_add(dev, part) != 0) {
device_del(dev);
- return 1;
+ return -EINVAL;
}
}
@@ -966,7 +966,7 @@ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_
/**
* Initialize global device list.
*
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int mtd_devices_init(void)
{
@@ -1037,7 +1037,7 @@ static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_
* @param ret_id output pointer to next char after parse completes (output)
* @param dev_type parsed device type (output)
* @param dev_num parsed device number (output)
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
u8 *dev_num)
@@ -1059,12 +1059,12 @@ int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
p += 8;
} else {
printf("incorrect device type in %s\n", id);
- return 1;
+ return -EINVAL;
}
if (!isdigit(*p)) {
printf("incorrect device number in %s\n", id);
- return 1;
+ return -EINVAL;
}
*dev_num = simple_strtoul(p, (char **)&p, 0);
@@ -1079,7 +1079,7 @@ int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
*
* @param buf output buffer holding generated mtdparts string (output)
* @param buflen buffer size
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int generate_mtdparts(char *buf, u32 buflen)
{
@@ -1195,7 +1195,7 @@ static int generate_mtdparts(char *buf, u32 buflen)
cleanup:
last_parts[0] = '\0';
- return 1;
+ return -EINVAL;
}
/**
@@ -1204,7 +1204,7 @@ cleanup:
*
* @param buf output buffer holding generated mtdparts string (output)
* @param buflen buffer size
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int generate_mtdparts_save(char *buf, u32 buflen)
{
@@ -1342,7 +1342,7 @@ static void list_partitions(void)
* @param dev pointer to the requested device (output)
* @param part_num verified partition number (output)
* @param part pointer to requested partition (output)
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
int find_dev_and_part(const char *id, struct mtd_device **dev,
u8 *part_num, struct part_info **part)
@@ -1370,27 +1370,27 @@ int find_dev_and_part(const char *id, struct mtd_device **dev,
*part_num = 0;
if (mtd_id_parse(p, &p, &type, &dnum) != 0)
- return 1;
+ return -EINVAL;
if ((*p++ != ',') || (*p == '\0')) {
printf("no partition number specified\n");
- return 1;
+ return -EINVAL;
}
pnum = simple_strtoul(p, (char **)&p, 0);
if (*p != '\0') {
printf("unexpected trailing character '%c'\n", *p);
- return 1;
+ return -EINVAL;
}
if ((*dev = device_find(type, dnum)) == NULL) {
printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
- return 1;
+ return -ENODEV;
}
if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
printf("no such partition\n");
*dev = NULL;
- return 1;
+ return -EINVAL;
}
*part_num = pnum;
@@ -1402,7 +1402,7 @@ int find_dev_and_part(const char *id, struct mtd_device **dev,
* Find and delete partition. For partition id format see find_dev_and_part().
*
* @param id string describing device and partition
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int delete_partition(const char *id)
{
@@ -1417,17 +1417,17 @@ static int delete_partition(const char *id)
part->name, part->size, part->offset);
if (part_del(dev, part) != 0)
- return 1;
+ return -EINVAL;
if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
printf("generated mtdparts too long, resetting to null\n");
- return 1;
+ return -EINVAL;
}
return 0;
}
printf("partition %s not found\n", id);
- return 1;
+ return -ENOENT;
}
#if defined(CONFIG_CMD_MTDPARTS_SPREAD)
@@ -1478,7 +1478,7 @@ static void spread_partition(struct mtd_info *mtd, struct part_info *part,
* as big as their mtdparts environment variable sizes and they each start
* on a good block.
*
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int spread_partitions(void)
{
@@ -1493,7 +1493,7 @@ static int spread_partitions(void)
dev = list_entry(dentry, struct mtd_device, link);
if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
- return 1;
+ return -EINVAL;
part_num = 0;
cur_offs = 0;
@@ -1519,7 +1519,7 @@ static int spread_partitions(void)
if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
printf("generated mtdparts too long, resetting to null\n");
- return 1;
+ return -EINVAL;
}
return 0;
}
@@ -1547,7 +1547,7 @@ static const char *env_get_mtdparts(char *buf)
* for each entry. Add created devices to the global devices list.
*
* @param mtdparts string specifing mtd partitions
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int parse_mtdparts(const char *const mtdparts)
{
@@ -1605,7 +1605,7 @@ static int parse_mtdparts(const char *const mtdparts)
* to the global mtdids list.
*
* @param ids mapping string
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
static int parse_mtdids(const char *const ids)
{
@@ -1646,7 +1646,7 @@ static int parse_mtdids(const char *const ids)
/* check if requested device exists */
if (mtd_device_validate(type, num, &size) != 0)
- return 1;
+ return -EINVAL;
/* locate <mtd-id> */
mtd_id = p;
@@ -1704,7 +1704,7 @@ static int parse_mtdids(const char *const ids)
list_del(entry);
free(id_tmp);
}
- return 1;
+ return -EINVAL;
}
return 0;
@@ -1715,7 +1715,7 @@ static int parse_mtdids(const char *const ids)
* Parse and initialize global mtdids mapping and create global
* device/partition list.
*
- * Return: 0 on success, 1 otherwise
+ * Return: 0 on success, -errno otherwise
*/
int mtdparts_init(void)
{
@@ -1768,12 +1768,12 @@ int mtdparts_init(void)
env_set("mtdids", (char *)ids);
} else {
printf("mtdids not defined, no default present\n");
- return 1;
+ return -ENXIO;
}
}
if (strlen(ids) > MTDIDS_MAXLEN - 1) {
printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
- return 1;
+ return -EINVAL;
}
/* use defaults when mtdparts variable is not defined
@@ -1789,7 +1789,7 @@ int mtdparts_init(void)
if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
- return 1;
+ return -EINVAL;
}
/* check if we have already parsed those mtdids */
@@ -1800,7 +1800,7 @@ int mtdparts_init(void)
if (parse_mtdids(ids) != 0) {
mtd_devices_init();
- return 1;
+ return -EINVAL;
}
/* ok it's good, save new ids */
@@ -1810,11 +1810,11 @@ int mtdparts_init(void)
/* parse partitions if either mtdparts or mtdids were updated */
if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
if (parse_mtdparts(parts) != 0)
- return 1;
+ return -EINVAL;
if (list_empty(&devices)) {
printf("mtdparts_init: no valid partitions\n");
- return 1;
+ return -ENXIO;
}
/* ok it's good, save new parts */
@@ -2022,7 +2022,7 @@ static int do_mtdparts(struct cmd_tbl *cmdtp, int flag, int argc,
debug("add tmpbuf: %s\n", tmpbuf);
if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
- return 1;
+ return -EINVAL;
debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
dev->id->num, dev->id->mtd_id);
--
2.30.1
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