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cmd: ubi: Add 'ubi list' command for printing list of all UBI volumes

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To allow easily iterate over all UBI volumes, add a new command which
either print all user UBI volumes on output or set them into env variable.

As UBI volumes can have arbitrary name/label, in most cases it is useful to
iterate them by their numbers. This can be achieved by -numeric flag.

This functionality is similar to already existing 'part list' command which
prints partitions on formatted block device.

Signed-off-by: Pali Rohár <pali@kernel.org>
This commit is contained in:
Pali Rohár 2022-09-12 11:38:55 +02:00 committed by Tom Rini
parent 8db1fa5a0d
commit 6de1daf64b
1 changed files with 85 additions and 0 deletions
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85
cmd/ubi.c
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@ -27,6 +27,7 @@
#include <ubi_uboot.h>
#include <linux/errno.h>
#include <jffs2/load_kernel.h>
#include <linux/log2.h>
#undef ubi_msg
#define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
@ -84,6 +85,70 @@ static int ubi_info(int layout)
return 0;
}
static int ubi_list(const char *var, int numeric)
{
size_t namelen, len, size;
char *str, *str2;
int i;
if (!var) {
for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
if (!ubi->volumes[i])
continue;
if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
continue;
printf("%d: %s\n",
ubi->volumes[i]->vol_id,
ubi->volumes[i]->name);
}
return 0;
}
len = 0;
size = 16;
str = malloc(size);
if (!str)
return 1;
for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
if (!ubi->volumes[i])
continue;
if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
continue;
if (numeric)
namelen = 10; /* strlen(stringify(INT_MAX)) */
else
namelen = strlen(ubi->volumes[i]->name);
if (len + namelen + 1 > size) {
size = roundup_pow_of_two(len + namelen + 1) * 2;
str2 = realloc(str, size);
if (!str2) {
free(str);
return 1;
}
str = str2;
}
if (len)
str[len++] = ' ';
if (numeric) {
len += sprintf(str + len, "%d", ubi->volumes[i]->vol_id) + 1;
} else {
memcpy(str + len, ubi->volumes[i]->name, namelen);
len += namelen;
str[len] = 0;
}
}
env_set(var, str);
free(str);
return 0;
}
static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
{
return strcmp(vol->name, name);
@ -586,6 +651,21 @@ static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
return ubi_info(layout);
}
if (strcmp(argv[1], "list") == 0) {
int numeric = 0;
if (argc >= 2 && argv[2][0] == '-') {
if (strcmp(argv[2], "-numeric") == 0)
numeric = 1;
else
return CMD_RET_USAGE;
}
if (!numeric && argc != 2 && argc != 3)
return CMD_RET_USAGE;
if (numeric && argc != 3 && argc != 4)
return CMD_RET_USAGE;
return ubi_list(argv[numeric ? 3 : 2], numeric);
}
if (strcmp(argv[1], "check") == 0) {
if (argc > 2)
return ubi_check(argv[2]);
@ -725,6 +805,11 @@ U_BOOT_CMD(
" header offset)\n"
"ubi info [l[ayout]]"
" - Display volume and ubi layout information\n"
"ubi list [flags]"
" - print the list of volumes\n"
"ubi list [flags] <varname>"
" - set environment variable to the list of volumes"
" (flags can be -numeric)\n"
"ubi check volumename"
" - check if volumename exists\n"
"ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"