You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
154 lines
3.9 KiB
Diff
154 lines
3.9 KiB
Diff
The WRT1900AC among other Linksys routers uses a dual-firmware layout.
|
|
The bootloader passes the active rootfs in bootargs and also sets the
|
|
rootfstype to jffs2 - which is clearly something we don't want.
|
|
|
|
Rename both root= and rootfstype= variables to avoid issues and also
|
|
use the former to dynamically rename the active partition to "ubi".
|
|
|
|
|
|
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
|
|
|
|
--- a/arch/arm/boot/compressed/atags_to_fdt.c
|
|
+++ b/arch/arm/boot/compressed/atags_to_fdt.c
|
|
@@ -66,6 +66,18 @@ static uint32_t get_cell_size(const void
|
|
return cell_size;
|
|
}
|
|
|
|
+static void mangle_bootargs(void *fdt, const char *fdt_cmdline)
|
|
+{
|
|
+ char *rootdev;
|
|
+ char *rootfs;
|
|
+
|
|
+ rootdev = strstr(fdt_cmdline, "root=/dev/mtdblock");
|
|
+ strncpy(rootdev, "uboot_active_root=", 18);
|
|
+
|
|
+ rootfs = strstr(fdt_cmdline, "rootfstype");
|
|
+ strncpy(rootfs, "origfstype", 10);
|
|
+}
|
|
+
|
|
static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
|
|
{
|
|
char cmdline[COMMAND_LINE_SIZE];
|
|
@@ -135,6 +147,9 @@ int atags_to_fdt(void *atag_list, void *
|
|
|
|
for_each_tag(atag, atag_list) {
|
|
if (atag->hdr.tag == ATAG_CMDLINE) {
|
|
+ /* Rename the original root= and rootfstype= options */
|
|
+ mangle_bootargs(fdt,
|
|
+ atag->u.cmdline.cmdline);
|
|
/* Append the ATAGS command line to the device tree
|
|
* command line.
|
|
* NB: This means that if the same parameter is set in
|
|
--- a/arch/arm/boot/compressed/string.c
|
|
+++ b/arch/arm/boot/compressed/string.c
|
|
@@ -111,6 +111,53 @@ char *strchr(const char *s, int c)
|
|
return (char *)s;
|
|
}
|
|
|
|
+/**
|
|
+ * strncpy - Copy a length-limited, %NUL-terminated string
|
|
+ * @dest: Where to copy the string to
|
|
+ * @src: Where to copy the string from
|
|
+ * @count: The maximum number of bytes to copy
|
|
+ *
|
|
+ * The result is not %NUL-terminated if the source exceeds
|
|
+ * @count bytes.
|
|
+ *
|
|
+ * In the case where the length of @src is less than that of
|
|
+ * count, the remainder of @dest will be padded with %NUL.
|
|
+ *
|
|
+ */
|
|
+char *strncpy(char *dest, const char *src, size_t count)
|
|
+{
|
|
+ char *tmp = dest;
|
|
+
|
|
+ while (count) {
|
|
+ if ((*tmp = *src) != 0)
|
|
+ src++;
|
|
+ tmp++;
|
|
+ count--;
|
|
+ }
|
|
+ return dest;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * strstr - Find the first substring in a %NUL terminated string
|
|
+ * @s1: The string to be searched
|
|
+ * @s2: The string to search for
|
|
+ */
|
|
+char *strstr(const char *s1, const char *s2)
|
|
+{
|
|
+ size_t l1, l2;
|
|
+
|
|
+ l2 = strlen(s2);
|
|
+ if (!l2)
|
|
+ return (char *)s1;
|
|
+ l1 = strlen(s1);
|
|
+ while (l1 >= l2) {
|
|
+ l1--;
|
|
+ if (!memcmp(s1, s2, l2))
|
|
+ return (char *)s1;
|
|
+ s1++;
|
|
+ }
|
|
+ return NULL;
|
|
+}
|
|
#undef memset
|
|
|
|
void *memset(void *s, int c, size_t count)
|
|
--- a/drivers/mtd/ofpart.c
|
|
+++ b/drivers/mtd/ofpart.c
|
|
@@ -25,12 +25,15 @@ static bool node_has_compatible(struct d
|
|
return of_get_property(pp, "compatible", NULL);
|
|
}
|
|
|
|
+static int uboot_active_root;
|
|
+
|
|
static int parse_ofpart_partitions(struct mtd_info *master,
|
|
struct mtd_partition **pparts,
|
|
struct mtd_part_parser_data *data)
|
|
{
|
|
struct device_node *node;
|
|
const char *partname;
|
|
+ const char *owrtpart = "ubi";
|
|
struct device_node *pp;
|
|
int nr_parts, i;
|
|
|
|
@@ -78,9 +81,15 @@ static int parse_ofpart_partitions(struc
|
|
(*pparts)[i].offset = of_read_number(reg, a_cells);
|
|
(*pparts)[i].size = of_read_number(reg + a_cells, s_cells);
|
|
|
|
- partname = of_get_property(pp, "label", &len);
|
|
- if (!partname)
|
|
- partname = of_get_property(pp, "name", &len);
|
|
+ if (uboot_active_root && (i == uboot_active_root)) {
|
|
+ partname = owrtpart;
|
|
+ } else {
|
|
+ partname = of_get_property(pp, "label", &len);
|
|
+
|
|
+ if (!partname)
|
|
+ partname = of_get_property(pp, "name", &len);
|
|
+ }
|
|
+
|
|
(*pparts)[i].name = partname;
|
|
|
|
if (of_get_property(pp, "read-only", &len))
|
|
@@ -178,6 +187,18 @@ static int __init ofpart_parser_init(voi
|
|
return 0;
|
|
}
|
|
|
|
+static int __init active_root(char *str)
|
|
+{
|
|
+ get_option(&str, &uboot_active_root);
|
|
+
|
|
+ if (!uboot_active_root)
|
|
+ return 1;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+__setup("uboot_active_root=", active_root);
|
|
+
|
|
static void __exit ofpart_parser_exit(void)
|
|
{
|
|
deregister_mtd_parser(&ofpart_parser);
|