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-rw-r--r--target/linux/generic/patches-3.18/408-mtd-old-rootfs-squashfs-splitter.patch76
1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/408-mtd-old-rootfs-squashfs-splitter.patch b/target/linux/generic/patches-3.18/408-mtd-old-rootfs-squashfs-splitter.patch
new file mode 100644
index 0000000000..07d4f7d824
--- /dev/null
+++ b/target/linux/generic/patches-3.18/408-mtd-old-rootfs-squashfs-splitter.patch
@@ -0,0 +1,76 @@
+--- 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
+@@ -681,6 +681,47 @@ 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)
+@@ -738,7 +779,10 @@ 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;
+ }