77 lines
2.1 KiB
Diff
77 lines
2.1 KiB
Diff
--- a/drivers/mtd/Kconfig
|
|
+++ b/drivers/mtd/Kconfig
|
|
@@ -18,6 +18,11 @@ config MTD_ROOTFS_ROOT_DEV
|
|
bool "Automatically set 'rootfs' partition to be root filesystem"
|
|
default y
|
|
|
|
+config MTD_ROOTFS_SPLIT
|
|
+ bool "Automatically split 'rootfs' partition for squashfs"
|
|
+ select MTD_SPLIT
|
|
+ default y
|
|
+
|
|
config MTD_SPLIT_FIRMWARE
|
|
bool "Automatically split firmware partition for kernel+rootfs"
|
|
default y
|
|
--- a/drivers/mtd/mtdpart.c
|
|
+++ b/drivers/mtd/mtdpart.c
|
|
@@ -668,6 +668,47 @@ mtd_pad_erasesize(struct mtd_info *mtd,
|
|
return len;
|
|
}
|
|
|
|
+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
|
|
+{
|
|
+ size_t squashfs_len;
|
|
+ int len, ret;
|
|
+
|
|
+ ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ len = mtd_pad_erasesize(master, offset, squashfs_len);
|
|
+ *split_offset = offset + len;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
|
|
+{
|
|
+ unsigned int split_offset = 0;
|
|
+ unsigned int split_size;
|
|
+ int ret;
|
|
+
|
|
+ ret = split_squashfs(master, part->offset, &split_offset);
|
|
+ if (ret)
|
|
+ return;
|
|
+
|
|
+ if (split_offset <= 0)
|
|
+ return;
|
|
+
|
|
+ if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
|
|
+ pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
|
|
+ else
|
|
+ pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
|
|
+
|
|
+ split_size = part->mtd.size - (split_offset - part->offset);
|
|
+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
|
|
+ ROOTFS_SPLIT_NAME, split_offset, split_size);
|
|
+
|
|
+ __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
|
|
+ split_size, false);
|
|
+}
|
|
+
|
|
#define UBOOT_MAGIC 0x27051956
|
|
|
|
static void split_uimage(struct mtd_info *master, struct mtd_part *part)
|
|
@@ -730,7 +771,10 @@ static void mtd_partition_split(struct m
|
|
return;
|
|
|
|
if (!strcmp(part->mtd.name, "rootfs")) {
|
|
- run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
|
|
+ int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
|
|
+
|
|
+ if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
|
|
+ split_rootfs_data(master, part);
|
|
|
|
rootfs_found = 1;
|
|
}
|